50156-001: Muara Laboh Geothermal Power Project

Draft Addendum Environmental Impact Analysis (ANDAL), and Environmental Management Plan and Environmental Monitoring Plan (RKL-RPL)

Project Number: 50156-001 January 2015

INO: Muara Laboh Geothermal Power Project

Prepared by PT Greencap NAA Indonesia for PT Supreme Energy Muara Laboh (PT SEML)

This addendum to the environmental impact assessment, environmental management plan, and environmental monitoring plan is a document of the borrower. The views expressed herein do not necessarily represent those of ADB's Board of Directors, Management, or staff, and may be preliminary in nature. Your attention is directed to the “Term of Use” section of this website.

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AD DENDUM

ENVIRONMENTAL IMPACT ANALYSIS (ANDAL), AND ENVIRONMENTAL MANAGEMENT PLAN – ENVIRONMENTAL MONITORING PLAN (RKL-RPL)

Geothermal Development Activities for 250 MW Geothermal Power Plant (PLTP Muara Laboh 250 MW) at Solok Selatan District, West Sumatra Province

Januari, 2015

ADENDUM

Environmental Impact Analysis (ANDAL), and Environmental Management Plan – Environmental Monitoring Plan

(RKL-RPL)

Geothermal Development Activities for 250 MW Muara Laboh Geothermal Power Plant (PLTP Muara Laboh 250 MW) at Solok Selatan District, West Sumatra Province

January, 2015

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

HEAD OF SOLOK SELATAN DISTRICT

WEST SUMATRA PROVINCE

DECREE OF THE HEAD OOF SOLOK SELATAN DISTRICT

NUMBER : 660.26.2015

ENVIRONMENTAL FEASIBILITY OF THE PLAN FOR THE AMENDMENT TO

ENVIRONMENTAL IMPACT ANALYSIS (ANDAL), ENVIRONMENTAL

MANAGEMENT PLAN AND ENVIRONMENTAL MONITORING PLAN (RKL-RPL)

OF GEOTHERMAL DEVELOPMENT ACTIVITIES FOR 250 MW MUARA LABUH

GEOTHERMAL POWER PLANT (PLTP MUARA LABOH 250 MW) IN SOLOK

SELATAN DISTRICT, WEST SUMATRA PROVINCE BY PT. SUPREME

ENERGY MUARA LABOH

THE HEAD OF SOLOK SELATAN DISTRICT,

Considering : a. that according to Article 50 of

Government Regulation Number 27 of

2012 on the Environmental Permit, in

respect of the plan for the changes of

activities of PT Supreme Energy Muara

Laboh it is necessary to formulate a

document on the Environmental Impact

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Analysis (ANDAL), Environmental

Management Plan (RKL) and

Environmental Monitoring Plan (RPL) on

the activities of Geothermal

Development for 250 MW (Mega Watt)

Muara Laboh Geothermal Power Plant

(PLTP Muara Laboh 250 Mega Watt (MW))

in Solok Selatan District , West

Sumatra Province.

b. that the documents of the amendment to

the ANDAL, RKL and RPL for Geothermal

Development activities for 250 MW

Muara Laboh Geothermal Power Plant

(PLTP Muara Labuh 250 MW) in Solok

Selatan District, West Sumatra

Province by PT. Supreme Energy Muara

Laboh is a part of Environmental

Impact Analysis (AMDAL) Study.

c. that pursuant to Government Regulation

Number 27 of 2012 on the Environmental

Permit, any activities and/or business

required to have AMDAL must obtain

[approval under] a Decree on

Environmental Feasibility based on the

Environmental Feasibility

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Recommendation and the result of the

assessment by AMDAL Assessment

Committee of Solok Selatan District;

d. that based on the considerations as

referred to in letter a, b and c, it

is necessary to establish a Decree of

the Head of the District;

In view of : 1. Law Number 5 of 1990 on the

Conservation of Biological Natural

Resources and its Ecosystem (State

Gazette of the Republic of Indonesia

1990 Number 49, Supplement to State

Gazette of the Republic of Indonesia

Number 3419);

2. Law Number 38 of 2003 on the

Establishment of Dharmasraya District,

Solok Selatan District and West

Pesaman District in West Sumatra

Province (State Gazette of the

Republic of Indonesia 2003 Number 153,

Supplement to State Gazette of the

Republic of Indonesia Number 4348);

3. Law Number 32 of 2004 on Regional

Government (State Gazette of the

Republic of Indonesia 2004 Number 125,

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Supplement to State Gazette of the

Republic of Indonesia Number 4437)(as

amended by Law Number 12 of 2008 on

the Second Amendment to Law Number 32

of 2004 on Regional Government(State

Gazette of the Republic of Indonesia

2003 Number 59, Supplement to State

Gazette of the Republic of Indonesia

Number 4844);

4. Law Number 26 of 2007 on Spatial

Layout Management (State Gazette of

the Republic of Indonesia 2007 Number

68, Supplement to State Gazette of the

Republic of Indonesia Number 4725);

5. Law Number 32 of 2009 on Environmental

Protection and Management (State

Gazette of the Republic of Indonesia

2009 Number 140, Supplement to State

Gazette of the Republic of Indonesia

Number 5059);

6. Law Number 12 of 2011 on the

Establishment of Laws and Regulations

(State Gazette of the Republic of

Indonesia 2011 Number 53, Supplement

to State Gazette of the Republic of

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Indonesia Number 4389);

7. Government Regulation Number 38 of

2007 on Division of Government Affairs

Between Government, Provincial

Regional and District/Municipality

Regional Government(State Gazette of

the Republic of Indonesia of 2007

Number 82, Supplement to State Gazette

of the Republic of Indonesia Number

4953);

8. Government Regulation Number 27 of

2012 on Environmental Permit (State

Gazette of the Republic of Indonesia

2008 Number 48, Supplement to State

Gazette of the Republic of Indonesia

Number 5285);

9. Regulation of the State Minister for

the Environment Number 05 of 2012 on

the Type of Planned Business and/or

Activities Requiring AMDAL ;

10. Regulation of the State Minister for

the Environment Number 16 of 2012 on

Guidelines for Preparation of

Environmental Documents;

11. Regional Regulation of Solok Selatan

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

District Number 6 of 2008 on the

Organizational Structure and Working

Procedure of the Agency/Service

Office/Office and Inspectorate of

Solok Selatan District;

12 Regional Regulation of Solok Selatan

District Number 13 of 2008 on

Environmental Management.

HAS DECIDED

To establish:

FIRST : Decree on Environmental Feasibility issued

to :

Company Name : PT. Supreme Energy

Muara Laboh

Person in charge : Priyandaru Effendi

Position : VP Relations & SHE

Office Address : Equity Tower, 18th

Floor, Sudirman

Central Business

District (SCBD) Lot 9

Jalan Jenderal

Sudirman Kav. 52-53 6

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Jakarta 12190,

Indonesia

Activity : Geothermal Development

for PLTP Muara Laboh

250 MW in Solok

Selatan District,

West Sumatra

Province.

Location : Pauh Duo District in

Kenagarian Alam Pauh

Duo (Jorong Kampung

Baru, Jorong Taratak

Tinggi, Jorong

Pekonina) and

Kenagarian Pauh Duo

Non Batigo (Jorong

Pinang Awan).

Total Land Area : 62,300 Hectares

Coordinates : According to Decree of

the Head of Solok

Selatan District

Number 540-94-2013 of

2013 on the Amendment

to Decree of the Head

of the District of

Solok Selatan Number 7

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

540/02/DESDM/BUP-2010

on the Geothermal

Mining Business

License at Liki

Pinang Awan for PT.

Supreme Energy Muara

Laboh.

Production Capacity : 250 MW

SECOND : Plan for the change of activities of

Geothermal Development for PLTP Muara

Laboh 250 MW in Solok Selatan District,

West Sumatra Province includes:

1. The plan for manpower recruitment:

Manpower to be recruited during the

construction and operation for the

drilling of 7 (seven) wellpads and

their operation.

Hiring of 2000-2500 workers that

includes both permanent and non-

permanent workers, 15% of which are

local workers living around the

activity location.

2. The plan to have additional new

Wellpads.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

In the ANDAL, RKL and RPL amendment

documents there are 7 (seven)

additional wellpads with the following

coordinates:

Code UTM Coordinates

Wellpad ID Easting Northing

ML-F 736705 9819340

ML-1 736410 9819270

ML-J 736405 9819005

ML-06 737780 9819050

ML-07 738260 9818940

ML-08 737610 9821545

ML-09 736420 9823780

3. The PLTP Construction with 70 MW

capacity

This development system of 70 MW

capacity shall use a dual flash steam

cycle technology, where this 70 MW

capacity is originated from wellpad ML-

A that produces HP steam and wellpad

ML-H that produces HP Steam and LP

Steam, and it is estimated capable to

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

produce 60 MW from HP Steam and LP

Steam 10 MW system.

4. Construction of Switchyard and

electricity connection with the State

Electricity Company (PLN) transmission

network at a voltage of 150 KV to PLN

Sub-station in Sungai Rumbai.

5. Construction of Steam Gathering System.

Steam Gathering System or SGS consists

of a piping network from wellpads,

separators and piping network towards

the PLTP. The 2-phase steam

originating from each production well

is separated in the Separator so that

dry steam is formed and the remainder

is in the form of brine liquid. The dry

steam produced is then delivered

through the piping network to the PLTP,

while the brines are returned to the

reservoir through an injection well.

a. Two phase liquid piping network

system from wellpads.

Hot steam currently is originating

from wellpad ML-A and wellpad ML-H.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

The plan is to add 3 (three)

production wells at the location of

wellpad ML-A and 3 (three)

production wells at the location of

wellpad ML-H in order to achieve

the capacity of 70 MW .

b. Steam and brine separation system

in the separator.

Each wellpad ML-A and ML-H is

equipped with a separator having

the function to separate steam and

brines. This separator is capable

to produce dry steam without

brines. And this separator is

available at ML-A which is named

ML-A Separator Station (SSI)

consisting of 2 (two) units of HP

Separators and ML-H Separator

Station (SS2)which consists of 1

(one) unit of separator.

c. The parameters of chemical

properties of the brines coming out

from the separator are pH, Na, K,

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Ca, Cl, SO4, B, SiO2. And chemical

properties of the steam are CO2,

H2S, NH3, H2, CH2, N2

6. Construction of 1 phase liquid piping

network system

means a steam piping network system

that sends the steam from the separator

to PLTP, brine piping network that

sends the brines from the separator to

the injection well and condensate

piping network system that sends the

condensate from the PLTP condensor to

the injection well.

a. Construction of the steam piping

network having the function to

channel the pressure to the

separator station and PLTP.

b. Construction of the brine piping

network system and injection

wellpad is to send the brines to

the injection wellpad.

c. Construction of the condensate

piping network and injection

wellpad is to assist to send to the

PLTP condenser to the wellpad in

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

order that no condensate flows into

the body of the water of the river.

7. Construction of supporting project

facilities

a Domestic water supply and

treatment.

The need for clean water in the

volume of 130 m3 /hour taken from

the Bangko Jernih river through the

water treatment unit consisting of

among others settling pond, water

basin, clarifier, sand and carbon

filter and water storage.

b. Storm water treatment

is the drainage that has the

function to channel and direct rain

water so as not to mix with waste

water.

c. Waste water treatment plant

is the processing unit for waste

water consisting of settling pond,

oil trap and holding pond.

d. Chemical storage

is the building/ tank to store

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

liquid and hard chemical substance

e. Workshop

is a laydown area for heavy

equipment machinery and workshop.

f. Fire fighting system

is a small fire extinguishing

equipment

g. Emergency power

is the equipment required in an

emergency

h. project administration office

facility.

THIRD : The plan for the change of activities of

Geothermal Development for PLTP Muara Laboh

is feasible from the environmental aspects

point of view based on the following

considerations:

1. Based on the items of changes, it

includes the following:

a. Change of the location of the

Geothermal Power Plant (PLTP)

b. The additional 7 (seven) Wellpads

c. Additional supporting facilities

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

and infrastructures such as road

construction, pipelines and

buildings for the Temporary Storage

of Hazardous and Toxic Waste (TPS

LB3)

2. According to the prediction of spatial

and zone-based layout aspects, the

amendment to AMDAL documents is for the

conducting activities for additional 7

(seven) wellpads of PT. Supreme Energy

Muara Laboh located in the Area

Intended to be Used for Another Purpose

(APL)and according to the Regional

Spatial Layout Plan () of Solok Selatan

District of 2011 – 2031 with the following coordinates:

Code UTM Coordinates

Wellpad ID E ASTING N ORTHING

ML -F 736705 9819340

ML -1 736410 9819270

ML -J 736405 9819005

ML-06 737780 9819050

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

ML-07 738260 9818940

ML-08 737610 9821545

ML-09 736420 9823780

3. Based on prediction on the geophysical,

chemical, biological, social,

economical, cultural and health aspects

in the ANDAL, RKL and RPL amendment

documents of PT. Supreme Energy Muara

Laboh during the Preconstruction,

Construction, Operation and Post-

operation stages, the important impacts

arising from the planned activities are

as follows:

a. Geophysical – Chemical Components i. Change of air quality and

increase in noise caused by

the production well and

injection well drilling,

production well test drilling,

well maintenance,

commissioning, turbine and

condenser operation

activities.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

ii. Increase in erotion rate,

sedimentation rate and water

run-off rate caused by land

clearing and land

rehabilitaton /revegetation.

iii. Reduced surface water quality

due to land clearing,

production well drilling,

injection well drilling,

production well test drilling,

well maintenance, turbine and

condenser operations and land

rehabilitation/revegetation.

b. Biological Component

i. Disturbance and reduction of

biodiversity of terrestrial

flora and fauna caused by land

preparation and land

rehabilitation/revegetation.

ii. Disturbance and reduction of

biodiversity of river aquatic

biota caused by land

preparation, drilling of

production wells and injection

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

wells, production well test

and at the production well,

injection well operational

stage, production well test,

well maintenance and such

impacts occur during the post

operational stage, namely the

stage of land rehabilitation

and revegetation.

c. Socio-economical Component

i. The effects on the employment

opportunities, business

opportunities, society income

and social values and norms as

a result of the activities on

labor recruitment and

termination of employment

during the construction up to

Post-Operation.

ii. Conflicts that arise during

the ownership and control of

the land as a result of land

acquisition activities for the

construction of PLTP

facilities and infrastructures

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

iii. The various perceptions of the

community as a result of land

acquisition, labor recruitment

and termination of employment.

d. Public Health Component

The effects on public health

due to the change of

environmental quality as a

result of activities during

the construction of

production and injection well

drilling, production well test

and during the operational

stage of production and

injection well drilling,

production well test and well

maintenance.

FOURTH : Based on the holistic evaluation on all

existing hypothetical important impacts as

referred to in the THIRD POINT, where all

positive important impacts could be maintaned

and the negative important impacts could be

managed by using several procedures/methods

of the technological, social and

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

institutional approaches which have the

purpose of managing such impacts.

FIFTH : The form of management performed based on

ANDAL, RKL and RPL amendment documents by PT.

Supreme Energy Muara Laboh as the proponent

for managing the important impacts as

referred to in the THIRD POINT is as follows:

A. Pre-Construction Stage

1. For land management and control,

among others:

a. Performing dissemination on

the land acquisition plan by

referring to Presidential

Regulation No. 36 of 2005.

b. conducting land acquisition

wisely and justly in

accordance with the prevailing

regulations particularly on

the land compensation process

and community productive

crops.

c. Considering the aspirations of

the customary community

related to the land

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

acquisition with the land

owners, district government,

nagari and KAN as well as

ninik mamak.

2. to manage the impact of community

perception the following methods

have been used:

a. Identifying the ownership of

the land to be acquired.

b. Acquiring the land directly

from the land owner by

negotiation and payment of

compensation for paddy field,

garden / field cultivation

fees which are acknowledged by

the Wali Jorong, Wali Nagari,

Ninik Mamak, KAN Alam Pauh Duo

and/or Pauh Duo Nan Batigo.

c. Following up the aspiration of

customary community related to

the land acquisition.

B. Construction Stage

1. Management of physical–chemical components for ambient air quality

during the operation stage shall be

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

performed in the following ways:

a. Securing well locations and

establishing the safe zone

boundary for the residents in

the surrounding area.

b. Equipping the workers who are

working around the location

with occupational safety tools

and equipment.

c. At the locations of production

test, H2S monitoring system

device shall be installed.

d. Maintenance of construction

vehicle.

e. Slowing down the speed of

transport vehicles to a

maximum of 30 km/hour

f. During the dry season, the

roads shall be sprayed

regularly

g. Reducing H2S emission by using

Environmental Economic

Technology approach.

h. Pipe installation shall follow

the fault to prevent pipelines

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

from breaking up, if land

movement occurs.

i. Installment of Occupational

Health, Safety, and

Environmental Protection

(K3LL) according to the SOP.

2. Physical – chemical component management for noise shall be

performed by socio-economic and

technological approach, namely:

a. providing extension for the

population at the nearest

location,

b. determining the noise buffer

zone,

c. use of hearing protection

equipment for the workers who

work around the location of

production test.

3. Physical – chemical management for erosion, sedimentation, surface

water run-off and maintaining

surface water quality by:

a. Controlling surface flow

originated from rain water by

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

constructing drainage towards

the catch pond area.

b. Controlling erosion

technically and vegetatively

by planting trees

perpendicular to the flow or

parallel with the countor or

in an open area.

c. Whenever possible carrying out

works on the land during the

dry season.

4. Biological component management for

terrestrial flora and fauna shall be

performed in the following ways:

a. Minimizing open area without

vegetation

b. Opening the land in stages

according to the planned

activities.

c. Relocating the existence of

preserved flora located around

the project site.

d. carrying out revegetation with

the type of plants which are

suitable to the land condition

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

and local climate in an empty

land by using local plants.

e. greening the activity area by

using types of plants which

are the source of animal feed.

f. Prohibiting hunting and

catching animals and taking

preserved flora.

g. Installation of prohibition

signs to catch the protected

animals/ fauna.

h. building and developing

nursery ground to develop

local plant seeds.

i. Cooperating with the related

institutions in safeguarding

the forest area/TNKS from

illegal logging

5. Biological component management for

aquatic biota shall be performed by

technological approach namely by

controlling the land erosion and

sedimentation as follows:

a. Controlling the surface flow

originating from rain water by

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

constructing drainage towards

the catch pond area.

b. Controlling erosion

technically and vegetatively

by planting trees

perpendicular to the flow or

parallel with the countor or

in an open area.

c. Whenever possible carrying out

works on the land during the

dry season.

6. Socio-economic and cultural

component management for employment

opportunity shall be performed in

the followingways:

a. Disseminating information

regarding any vacancies

available and the required

qualifications of the manpower

to carry out construction of

PLTP Muara Laboh project to

all Jorongs around the

activity location.

b. Selection of candidate

manpower and recruitment of

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

manpower according to the

formation set out by giving

priority to the manpower

originating from the jorongs

around the activity location.

c. Education and training program

for the manpower to be

employed at PLTP Muara Laboh

as well as community

empowerment activities.

7. Socio-economic and cultural

component management for the

opportunity to do business shall be

performed in the following ways:

a. Facilitating and assisting the

residents around the activity

location in establishing new

business through CSR program.

b. Organizing entrepreneurship

education and training program

and community empowerment

activities for the residents

around the activity location.

c. Providing training for the

manpower in the industrial

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

field which absorbs a lot of

manpower (Presidential

Regulation No. 28 of 2008

regarding National Industrial

Policy), particularly training

in the field of creative

industry such as handicrafts,

performance art, interactive

games etc.

8. Management on the increase in

community’s income shall be performed in the following ways:

a. Determining salary/wage levels

which commensurate with

reasonable costs of living.

b. Conducting community economic

empowerment activities

9. Management on the effects of social

norm shall be performed in the

following ways:

a. Disseminating the recruitment

of manpower in accordance with

the principles of honesty,

openness and fairness.

b. Carrying out and applying

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

recruitment of manpower based

on the applicable standards

and rules.

c. Fulfilling the commitment on

hiring manpower that comes

from the area directly

connected with the PLTP

construction activities.

10. The impact of community perception

shall be managed in the

followingways:

a. Providing sufficient training

in work skills for the

workers, so that when their

employment is terminated they

are ready and can compete in

getting new jobs.

b. Giving and providing

information regarding

employment opportunity to the

workers whose employment is

terminated as the construction

of geothermal electric power

plant has been completed.

11. The impact on the reduced community

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

health shall be managed as follows:

a. Providing an acceptable and

hygienic sanitation facility

such as lactrine, toilet and

garbage bins around the

project area.

b. Enhancing the understanding

of the community about

environmental health by direct

and indirect extension.

C. Operational Stage

1. Physical–chemical components for ambient air quality shall be managed

in the following ways:

a. Securing the well location and

establishing a safety zone

boundary for the residents in

the surrounding area.

b. Equipping the workers working

in the surrounding location

with the work safety tools and

equipment.

c In the production test

location, H2S monitoring

system equipment shall be

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

installed.

d. Contruction vehicle

maintenance.

e. Reducing the speed of

transportation vehicles to a

maximum speed of 30 km/hour

f. Watering the roads regularly

during the dry season

g. Reducing H2S emission using

Environmental Economic

Technological approach.

h. Installing the pipelines

following the fault to prevent

pipelines from breaking up, if

land movement occurs.

i. Installing signage for

Occupational Health, Safety

and Environmental Protection

(K3LL) according to the SOP.

2. Management of physical – chemical components for noise by using socio-

economic and technonogical

approaches i.e.

1. Determining the noise buffer

zone

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

2. Use of hearing protection

equiment for workers around

the production test location

3. Physical–chemical management to maintain surface water and

disturbance on aquatic biota shall

be performed in the following ways:

a. Controlling surface flow

coming from rain water by

building drainage towards the

catch pond area.

b. Controlling erosion

technically and vegetatively

by planting trees

perpendicular to the flow or

parallel with the contour or

on an open area

c. Whenever possible carrying out

land works in dry season.

4. Socio-economic and cultural

component management for employment

opportunity shall be performed in

the following ways:

a. Conveying information on any

vacancies and qualifications

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

of manpower required for

implementation of construction

of PLTP Muara Laboh project to

all jorongs around the

activity location.

b. Selection of candidate

manpower and recruitment of

manpower according to the

formation that has been

determined by giving priority

to the manpower originated

from the jorongs around the

activity location.

c Educational and training

program for workers to be

employed at PLTP Muara Laboh

or community empowerment

activities.

5. Socio-economic and cultural

component management for the

opportunity to do business shall be

performed in the following ways:

a. Facilitating and assisting the

residents around the activity

location to establish new

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

business through CSR program.

b. Organizing education and

training programs for

entrepreneurship and community

empowerment activities for the

residents around the activity

location.

c. Conducting training for

workers in the industry that

absorbs a lot of workers

(Presidential Regulation No.

28 of 2008 on National

Industrial Policy),

particularly training on

creative industry such as

handicrafts, performance art,

interactive games etc.

6. Management on the increased

community income shall be performed

in the following ways:

a. Determining wage/salary levels

according to decent standards

of living.

b. Conducting community economic

empowerment activities.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

7. Management of the influence of

social norms shall be performed in

the following ways:

a. Disseminating the recruitment

of manpower according to the

principles of honesty,

openness and fairness.

b. Carrying out and implement

manpower recruitment based on

the applicable standard and

provisions.

c. Showing the commitment to

recruit manpower from the

regions that are directly

related to PLTP development

activities.

8. Management on the impact where

community perception occurs shall be

performed in the following ways:

a. Giving sufficient training on

work skills for the manpower,

so that when their employment

is terminated, they are ready

to compete in getting new

jobs.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

b. Providing and making

information on work

opportunities available to the

workers whose employment are

terminated due to the

completion of the geothermal

power plant construction.

9. The impact of the declining

community health shall be managed by

the following ways:

a. Providing decent and healthy

sanitation facilities such as

latrine, toilet and garbage

bin around the project area.

b. Improving the understanding of

the community on environmental

health through direct and

indirect extensions.

D. Post Operational Stage

2. Physical–chemical management for erosion, sedimentation, surface

water run-off and maintainance of

surface water quality shall be

performed by the following ways:

a. Controlling erosion

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

technically and vegetatively

by planting the trees

perpendicular to the flow or

parallel to the countor or in

an open area prone to erosion.

b. Continuing management of

sedimentation erosion, surface

water run-off and maintaining

surface water quality which

has been performed during

consruction and operational

stages.

3. Management of biological components

for terrestrial flora and fauna

shall be performed in the following

ways:

a. Revegetation with the type of

plants which is suitable with

the type of land condition and

local climate in the vacant

land such as guava and Ficus

sp types and grasses.

b. Greening the activity area by

using the type of plants that

becomes the source of animal

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

feed.

c. Prohibiting hunting and

catching animals and taking

preserved flora fauna.

4. Biological component management for

aquatic biota shall be performed by

using a technological approach

namely by controlling land erosion

and sedimentation, management of

surface water run-off rate and

management of surface water quality

existing during the construction and

operational stages

5. Management of socio-economic and

cultural components for the loss

ofemployment opportunity, business

opportunity, source of community

income and negative perception of

the community shall be performed as

follows:

a. Disseminating to the workers

the plan for the closing of

the project and termination of

employment

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

b. Providing a decent

compensation

c. Disseminating to the community

the completion of the project.

6. Management of other impacts as a

result of activities of PT. Supreme

Energy Muara Laboh shall be

performed as follows:

a. Domestic solid waste shall be

disposed of at the waste final

disposal area (TPA)

b. Liquid wastes shall be managed

as follows:

- domestic liquid wastes

from all activities

shalll be treated in the

project area at Domestic

Liquid Waste Treatment

Installation.

- Condensate and brines

produced during PLTP

protection and

operational tests shall

be injected into the

injection well.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

- The sump pit which is

coated by water resistant

coating shall be built.

The water collected in

the sump pit shall be

used in the drilling

process as a drilling mud

component, afterwards it

shall be returned to the

injection well.

c. Toxic and Hazardous wastes (B3

waste) shall be managed in the

following ways:

- ensuring that the

equipment and materials

purchased by PT SEML do

not contain PCB,

asbestos, ODS (azone

depleting substances) and

other materials banned to

be used according to the

prevailing regulation.

- Neutralizing battery

water and save used lead

acid batteries safely.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

- Collecting used oil and

put it in a drum and

deliver it to the

registered B3 waste

treatment company.

- Intalling secondary

containment around

combustible and hazardous

materials according to

the need.

- providing training

regularly to the

employees in handling B3

waste.

SIXTH that after the issuance of the Decree on

Environmental Feasibility then the

Environmental Permit is issued. The other

permits and licenses requiredare as follows:

1. Permits and licenses for environmental

management protection

a. Permit for B3 Waste Temporary

Storage

b. Permit for B3 waste Collection and

Utilization

c. Permit for Domestic Waste Disposal

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

d. Other permits as required

2. Permits and licenses related to business

and/or activities

a. Permit for Utilization of the

Surface Water and Ground Water

b. Permit for the Storage and Use of

Explosive Materials

c. Permit for Water Reinjection into

the Rock Formation

d Building Construction Permit

e. Electric Power Industrial Business

License

f. Permit for the employment of foreign

workers

g. other required permits and licenses

SEVENTH : In carrying out its activities, PT Supreme

Energy Muara Laboh shall adhere to and comply

with the following:

1. Implement the activities of

environmental management plan and

environmental monitoring plan as

stipulated in ANDAL, RKL and RPL

documents, which are enclosed herein and

form an integral part of this Decree.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

2. Prior to carrying out Construction and

Operational activities, PT Supreme

Energy Muara Laboh shall once again

disseminate comprehensively to reach

every relevant community element and

coordinate with Solok Selatan District

Government, and agree to implement any

agreement that has been reached.

3. PT. Supreme Energy Muara Laboh must

manage the impact using socio-economic

and institutiional approach by giving

priority to the community located

closest to the planned activities who

are affected and further reaching the

other communities in Solok Selatan

District.

4. Report the outcome of activities

undertaken, report on environmental

management and environmental monitoring

to Solok Selatan District Head, and

other relevant Technical Insitutions in

Solok Selatan District every six (6)

months.

EIGHTH : Any failure by PT Supreme Eenergy Muara Laboh

to comply herewith may be subject to a

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

sanction in accordance with the prevailing

laws and regulations;

NINTH: This Decree shall be declared VOID should

there be any changes in the business and/or

activities found in the future that meet the

criteria of changes stipulated in Article 50

of Regulation of Government of the Republic

of Indonesia Number 27 of 2012 on the

Environmental Permit and the person in charge

of the business and/or activity shall submit

an application for the new enviromental

feasibility certificate due to such changes.

TENTH : If in the future the environmental impact is

beyond the estimation and anticipation set

forth in ANDAL, RKL and RPL amendment

documents which have been declared

environmentally feasible by the Regional

Government of Solok Selatan District, where

the impact is caused by PT. Supreme Energy

Muara Laboh, then PT. Supreme Energy Muara

Laboh is expected to immediately report it to

the institution related to the Solok Selatan

District Government, in order that all

necessary steps can be taken with the

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

condition that the expenses incurred shall be

under the resonsibility of the proponent.

ELEVENTH : If in the future an error is found herein, a

revision shall be made accordingly;

TWELFTH : This decree shall be effective as of the date

of its issuance.

Established in Padang Aro

On the 14th of January 2015

HEAD OF SOLOK SELATAN DISTRICT

[Signed][Sealed]

MUZNI ZAKARIA

Copies delivered to:

1. Minister of the Environment in Jakarta

2. Governor of West Sumatra in Padang

3. BAPEDALDA (Regional Agency for Environmental Impact

Management) West Sumatra Province in Padang

4. BAPPEDA dan Penanaman Modal (Regional Agency for

Development Planning and Investment) of Solok Selatan

District in Padang Aro.

5. Energy and Mineral Resources Service Office of Solok

Selatan District in Padang Aro

6. Forestry and Plantation Service Office of Solok

Selatan District in Padang Aro

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

7. General Service and Licensing Office of Solok Selatan

District in Padang Aro

8. AMDAL Assessment Committee, Solok Selatan District.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

THE HEAD OF SOLOK SELATAN DISTRICT

WEST SUMATRA PROVINCE

DECREE OF THE HEAD OF SOLOK SELATAN DISTRICT

NUMBER: 660.27.2015

AMENDMENT TO DECREE OF THE HEAD OF SOLOK SELATAN DISTRICT

NUMBER 660.324-2013 ON THE ENVIRONMENTAL PERMIT FOR THE

PLANNED GEOTHERMAL DEVELOPMENT ACTIVITIES FOR 250 MW MUARA

LABOH GEOTHERMAL POWER PLANT (PLTP MUARA LABUH 250 MW) IN

SOLOK SELATAN DISTRICT, WEST SUMATRA PROVINCE BY PT. SUPREME

ENERGY MUARA LABOH

THE HEAD OF SOLOK SELATAN DISTRICT,

Considering: a. that according to Article 50 of

Government Regulation Number 27 of 2012

on the Environmental Permit, if there is

any change of activity that has obtained

an environmental permit, then such

activity is required to make a new

document of Environmental Impact

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Assessment (AMDAL) or documents of the

Amendment to Environmental Impact

Analysis (ANDAL), Environmental

Management Plan (RKL), Environmental

Monitoring Plan (RPL).

b. that for the change of activity of PT.

Supreme Energy Muara Laboh it is

necessary to formulate a document of

amendment to Environmental Impact

Analysis (ANDAL), Environmental

Management Plan (RKL), Environmental

Monitoring Plan (RPL).

c. that the formulation and evaluation on

the document of the amendment to ANDAL,

RKL and RPL, the change of activities in

the Development of 250 MW (Mega Watt)

Muara Laboh Geothermal Power Plant (PLTP

MUARA LABOH 250 MW) in Solok Selatan

District, West Sumatra Province has been

completed, and must obtain the

Environmental Permit which is issued

simultaneously with the Decree of

Environmental Feasibility based on the

Recommendation of Environmental

Feasibility and the result of evaluation

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

of AMDAL Assessment Committe of Solok

Selatan District

d. that based on the considerations as

referred to in letter a, b and c it is

necessary to establish a Decree of the

Head of the District;

In view of: 1. Law No. 38 of 2003 on the Establishment

of Dharmasraya District, Solok Selatan

District and West Pasaman District in

West Sumatra Province (State Gazette of

the Republic of Indonesia Number 153 of

2003, Supplement to State Gazette of the

Republic of Indonesia 4348);

2. Law No. 32 of 2004 on Regional

Government (State Gazette of the

Republic of Indonesia No. 125 of 2004,

Supplement to State Gazette of the

Republic of Indonesia No. 4437);

3. Law No. 33 of 2004 on the Financial

Balance between National and Regional

Governments (State Gazette of the

Republic of Indonesia No. 126 of 2004,

Supplement to State Gazette of the

Republic of Indonesia No. 4438);

4. Law No. 26 of 2007 on Spatial Layout

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Planning (State Gazette of the Republic

of Indonesia No. 68 of 2007, Supplement

to State Gazette of the Republic of

Indonesia No. 4725);

5. Law No. 30 of 2007 on Energy (State

Gazette of the Republic of Indonesia No.

96 of 2007, Supplement to State Gazette

of the Republic of Indonesia No. 4746);

6. Law No. 32 of 2009 on Environmental

Protection and Management (State Gazette

of the Republic of Indonesia No. 140 of

2009, Supplement to State Gazette of the

Republic of Indonesia No. 5059);

7. Law No. 12 of 2011 on the Establishment

of Laws and Regulations (State Gazette

of the Republic of Indonesia No. 53 of

2011, Supplement to State Gazette of the

Republic of Indonesia No. 4389);

8. Government Regulation No. 38 of 2007 on

the Division of Governmental Affairs

between the Government, Provincial

Regional and District/Municipality

Governments (State Gazette of the

Republic of Indonesia No. 82 of 2007,

Supplement to State Gazette of the

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Republic of Indonesia No. 4593);

9. Government Regulation No. 27 of 2012 on

the Environmental Permit (State Gazette

of the Republic of Indonesia No. 48 of

2008, Supplement to State Gazette of the

Republic of Indonesia No. 8285);

10. Regulation of the State Minister for the

Environment No. 05 of 2012 on Types of

Plannned Business and/or Activities

Required to Have AMDAL;

11. Regulation of the State Minister for the

Environment No. 16 of 2012 on the

Guidelines for Preparation of

Environmental Documents;

12. Regional Government of Solok Selatan

District No. 6 of 2008 on SOTK

(Organizational Structure and Work

Procedures) at the Agency/Service

Office/Office and Inspectorate in Solok

Selatan District;

13. Regional Government of Solok Selatan

District No. 13 of 2008 on

Environmental Management;

HAS DECIDED:

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

To establish:

FIRST To grant Environmental Permit to:

Company name PT Supreme Energy Muara

Laboh

Person in Priyandaru Effendi

Charge:

Position: VP Relations & SHE

Office address: Equity Tower, 18th Floor,

Sudirman Central Business

District (SCBD) Lot 9,

Jalan Jenderal Sudirman

Kav. 52 – 53 Jakarta 12190, Indonesia.

Activities: Geothermal Development for

PLTP Muara Laboh 250 MW in

Solok Selatan District,

West Sumatra Province.

Location: Pauh Duo District in

Kenagarian Alam Pauh Duo

(Jurong Kampung Baru,

Jurong Taratak Tinggi,

Jurong Pekonina) and

Kenagarian Pauh Duo Nan

Batigo (Jorong Pinang

Awan).

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Total Area : 63,200 Hectares

Production 250 MW

capacity

Coordinates According to Decree of the

Head of the District Number

540-94-2013 of 2013 on the

Amendment to Decree of the

Head of the Solok Selatan

District Number

540/02/DESDM/BUP-2010 on

the Geothermal Mining

Business License at the

Geothermal Working Area of

Liki Pinang Awan for PT.

Supreme Energy Muara Laboh.

SECOND: The scope of this environmental permit

covers:

1. Activities of PT. Supreme Energy Muara

Laboh which have obtained the

Environmental Permit from th Head of

Solok Selatan District according to

Decree of the Head of Solok Selatan

District Number 660.324.-2013 on the

Environmental Permit for the Planned

Geothermal Development Activity for PLTP

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Muara Laboh 250 MW in Solok Selatan

District, West Sumatra Province by PT.

Supreme Energy Muara Laboh which are as

follows:

A. Preconstruction Stage

1. Preliminary Study that includes

technical planning works covering:

i. Planning for geothermal fluid

production including wells,

separators, brine accumulators,

distributing valves, safety

system in the geothermal field.

ii. Planning for safety equipment

for abnormal condition during

the steam production process.

iii. Planning for the system for

distributing the hot fluid to

the PLTP and its flowing into

the injection well.

2. Topography measurement to determine

the position, land area, activity

boundary, pipelines, PLTP roads and

transmission network.

3. Building Design Works covering

feasibility study and geothermal

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

field development technical design

that supplies geothermal fluid to

the PLTP, field investigation,

laboratory test, field analysis and

recomendation).

4. Land acquisition for provision of

access roads , wellpads and

supporting facilities for the

planned PLTP project. Where

according to the plan, the land

required for wellpads is 21.7 Ha,

for the pipeline 8,040 M, and for

the access roads 14,205 M in length,

while for the PLTP is 64,295 M2, for

Pump Station 216M2, Emergency

Ventilation Station 3,200 M2, for

the ponds 20,452M2, for Office

Building 15,000 M2, for Switchyard

3,500 M2 and for the Development of

Base Camp is 30,400 M2.

B. Construction Stage

1. Recruitment of 2.000 – 2.500 workers both permanent and non-permanent

with the number of local manpower

around the location of activities at

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

a rate of 15%.

2. Mobilization of Equipment and

Materials during 21.00 WIB – 06.00 WIB, 6 series for each convoy to be

transported by land using trucks,

trailers and low boys consisting of

dozers, loaders, dump trucks,

excavators, cranes, drilling

equipment, cementing equipment,

diesel generators, pumps, mechanical

construction equipment (cranes,

welding machine, cutting equipment),

drilling and casing pipes, materials

and structure constructions building

euipment, lumber, reinforcing,

structural steel, concrete, pipes,

isolation eqipment, turbines,

generator and transformers.

3. Preparing land covering vegetation

cutting works and land stripping and

landfilling including levelling of

the land.

4. Civil Construction covering the

following works:

i. Improvement of Connecting Roads

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

and Preparation of Wellpads

ii. Preparation of Production

Wellpads made in 7 locations,

namely:

Wellpad Locations East South

Longitude Latitude

0 0 MLA-A (wellpad ML- 101 7’57,16” -1 37’41.03” A)

0 0 MLA-B (wellpad ML- 101 8’29,01” -1 37’49.43” B)

0 0 MLA-C (wellpad ML- 101 8’02,75” -1 36’09.27” C)

0 0 MLA-D (wellpad ML- 101 7’33,27” -1 36’18.74” D)

0 0 MLA-E (wellpad ML- 101 8’37,33” -1 36’54.16” E)

0 0 MLA-F (wellpad ML- 101 8’40,35” -1 36’52.16” G)

0 0 MLA-G (wellpad ML- 101 7’51,29” -1 38’07.46” H)

iii. Injection well works comprise

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

brine injector well and

condensate injector well which

isplaced at the production well

having the function to minimize

cooling risks.

5. Electrical Mechanical Construction

covering the works for the

installation of PLTP equipment such

as steam turbine generator, tools,

OEC units, condensors with air

conditioners, overhead cranes.

6. Electrical Construction Works

covering assembling and installation

of generators, control and relay

equpment transformers, power plant

sub-station, lighting facilities,

installation of pipeline insulator

and painting.

7. PLTP Construction Works designed and

built based on the design procedure

for seismic resistance for building

structures pursuant to SNI 03-1726-

2002 which includes:

i. Project site construction works

consisting of construction of

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

the road to the PLTP location

and steam separation facilities.

ii. Improvement of existing

connecting roads to the

generator location and well

pads.

iii. PLTP construction works and the

other supporting facilities

where the steam supply

originating from 7 wellpads with

the number of wells

approximately 24 – 27wells. The steam is separated from brines

in the separation station and

then transmitted by gravitation

to 3 – 6 injection wells into the earth.

8. Construction of the cross country

pipeline corridor consisting of dry

steam pipelines, wet steam pipelines,

brine water pipelines and condensate

pipelines designed and built

resistant to the high pressure and

earthquake of 7 SR and equipped with

Safety Valves. The placement of this

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

pipeline shall be according to the

road routes and the side part thereof

shall be equipped with drainage.

9. Construction of supporting faciltiies

consisting of temporary construction

facilities, workers’ dwelling, place for collection of remaining materials

and temporary drainnage during the

preparation of location of

activities.

10. Production well drilling covering 24

– 27 production wells at a depth of

1,500 – 3,000 meters to meet the need for hot steam for the power plant

with the capacity of 250 MW.

Production well drilling shall be

of special cement to anticipate

intrusion with 4.5– 13.375 inches in size. Drilling works shall refer to

API (American Petroleum Institute)

standard materials and chemicals

having MSDS (material safety data

sheet). Driling is equipped with blow

out preventer.

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

11. Injection well drilling shall cover 3

– 6 wells having the function to return water into the rock formation.

The water required for the drilling

is 30 – 60 litres/second.

12. Production well testing shall have

the objective to estimate the well

production result to make a

production curve (deliverability).

13. Environmental Impact control

consisting of management of drilling

cuttings stored at the temporary

storage (TPS), treatment of mud water

sent to the mud pond which is

subsequently returned to the water

tank to meet the need for water

during drilling, and for the

treatment of black water channeled to

the septic tank.

14. Termination of Employment

C. Operational Stage

1. Recruitment of 200 – 240 manpower which is in line with their

respective expertise along with the

requirements of competencies and

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

certification.

2. Development of Geothermal Field

carried out for creating new wells to

anticipate degrading of the quality

of production wells as well as

injection wells.

3. PLTP operation consisting of

commissioning, Turbine Operation

using single pressure technology,

dual pressure technology and organic

ranking cycle technology (ORC).

4. Handling Occupational Health and

Safety (K3) that includes providing

the P3K (First Aid) training for the

employees, providing health clinics

in cooperation with Regional General

Hospital (RSUD) of Solok Selatan

District.

5. Control of Environmental Impact that

includes gas, solid waste, and liquid

waste treatment and the treatment of

oily wastes, chemicals and toxic and

hazardous (B3) wastes.

6. Emergency response management.

D. Post-Production Stage

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

1. Closing of Production and Injection

Wells by using cement with a minimum

width of 30 meters above casing shoe.

2. Deactivating pipeline networks and

supporting facilities

3. Deactiviating of the PLTP

Change of activities of PT. Supreme Energy

II Muara Laboh described in the documents of

amendment to ANDAL, RKL and RPL for Geothermal

Development activities for PLTP Muara Laboh

250 MW in Solok Selatan District, West Sumatra

Province which is as folows:

1. Workers Recruitment Plan

Workers to be recruited at the time of

construction and operation for the

drilling of seven (7) welpads and

operation.

Recruitment of 2000 – 2500 workers including permanent and non-permanent

workers with the number of local workers

around the activity location at a rate of

15%.

2. Plan for the addition of new wellpads

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

In the documents of amendment to ANDAL,

RKL and RPL there are additional seven

(7) wellpads with the following

coordinates:

Wellpad ID UTM Coordinates

Code Earthing Northing

ML-F 736705 9819340

ML-I 736410 9819270

ML-J 736405 9819905

ML-06 737780 9819050

ML-07 738260 9818940

ML-08 737610 9821545

ML-09 736410 9823780

3. Development of PLTP with a capacity of 70

The system for the development of 70 MW

capacity will use a dual-flash steam

cycle, where this 70 MW capacity is

sourced from the wellpad ML-A which

produces HP steam and wellpad ML-H which

produces HP Steam and LP Steam, and it is

estimated to produce 60 MW from the HP

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Steam and LP Steam system of 10 MW

4. Development of Switchyard and electrical

connection to PLN transmission network at

a voltage of 150 KV towards PLN Sub-

station in Rumbai River.

5. Development of Steam Gathering System

comprising pipeline network from the

wellpad, separator and piping network to

the PLTP. 2-phase steam originating from

every production well is separated in the

Separator and thus dry steam is formed and

the remaining is in the form of brines.

Then the dry steam produced is delivered

through the pipeline network to the PLTP,

while the brines shall be returned

returned to the reservoir through

injection wells.

a. 2-phase fluid pipeline network system

from wellpad

The hot steam currently is originated

from wellpad ML-A and wellpad ML-H.

The plan is to add three (3)

production wells at the location of

wellpad ML-A and three (3) production

wells at the location of wellpad ML-H

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

in order to achieve 70MW.

b. Steam and brine separating system in

the separator.

Each wellpad ML-A and ML-H is

equipped with separator facility

having the function to separate steam

and brines. This separator is able

to produce dry steam without brines.

In this separator facility there are

ML-A named ML-A Separator Station

(SS1) consisting of two (2) units of

HP Separator and ML-H Separator

Station (SS2) consisting of one (1)

separator unit.

c. the chemical properties of brines

coming out from the separator shall

be pH, Na, K, Ca, Cl, SO2, B, Si)2.

The steam chemical nature is CO2,

H2S, NH2, H2, CH4, N2.

6. Development of 1-phase fluid pipeline

network means the steam piping network

system which channels the steam from the

separator to the PLTP, brine pipeline

network which sends brines from the

separator to the injection well and the

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

condensate piping network system which

channels condensate from the PLTP

condensor to the injection well.

a. Development of the steam pipeline

network having the function to flow

the pressure to the separator station

and PLTP

b. Development of brines pipeline

network system and injection wellpad

is to flow brines to the injection

wellpad.

c. Development of the condensate

pipeline network and injection

wellpad is to assist in dispatching

the PLTP condenser to the wellpad so

that there is no condensate going

into river body water.

7. The development of the supporting project

facilities

a. Domestic water supply and treatment

The need for clean water in the

volume of 130 m3/hour taken from

Bangko Jernih River thrugh the clean

water treatment unit among others

settling pond, water basin,

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

clarifier, sand and carbon filter and

water storage.

b. Storm water treatment

is a channel having the function to

flow and direct rain water in order

that it is not mixed with the waste

water.

c. Waste water treatment plant

is a treatment unit for waste water

consisting of settling pond, oil trap

and holding pond.

d. Chemical storage

is a building/tank to store fluid and

solid chemicals.

e. Workshop

is the laydown area for heavy

equipment, meachinery and workshop

f. Fire fighting system

is a small size fire extinguisher

g. Emergency power

is supporting equipment in an

emergency state.

h. project administration office

facility

THIRD PT Supreme Energy Muara Laboh in implementing

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

its activities require permits and licenses

among others:

1. Permits for Environmental Protection and

Management

A. Permit for B3 Waste Temporary Storage

B. Permit for Gathering, Utilization of

B3 Waste

C. Permit for Domestic Waste Disposal

D. Other permits as required

2. Permits and licenses related to business

and/or activities

A. Permit for the Utilization of the

Surface and Ground water

B. Permit for Storage and Utilization of

Explosives

C. Permit for Water Reinjection into the

rock formation

D. Building Construction Permit

E. Electric Power Industrial Business

License

F. Permit for the Utilization of Foreign

Workers

G. and other required permits

FOURTH The institution issuing the permits and

licenses shall observe the Environmental

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Permit as a requirement for issuing a permit

in implementing the activities as referred to

in the SECOND point and THIRD point hereof;

FIFTH PT Supreme Energy Muara Laboh in implementing

its activities shall comply with the following

provisions:

1. Implement the activities of environmental

management plan and environmental

monitoring plan as set forth in the:

a. AMDAL documents as set out in the

Decree of the Head of the District

Number 660.324-2013 on the

Environmental Permit for Planned

Geothermal Development Activity for

PLTP Muara Laboh 250 MW at Solok

Selatan District, West Sumatra

Province by PT. Supreme Energy Muara

Laboh, which constitutes an enclosure

and an integral part of this Decree.

b. Documents of amendment to ANDAL, RKL

and RPL for Geothermal Development

Activity for PLTP Muara Laboh 250 MW

in Solok Selatan District, West

Sumatra Province by PT. Supreme

Energy Muara Laboh which constitutes

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

an enclosure and an integral part of

this Decree.

2. Prior to the implementation of

Construction and Operational activities,

PT. Supreme Energy Muara Laboh must re-

disseminate comprehensively to reach all

relevant community elements in

coordination with the Government of Solok

Selatan District and is willing to carry

it out in accordance with the agreement

reached from the dissemination activities

according to the prevailing laws and

regulations.

1. Implement the environmental

management plan and environmental

monitoring plan as set forth in

ANDAL, RKL and RPL documents and must

meet the environmental requirements,

standards and/or environmental damage

criteria according to the prevailing

laws and regulations.

2. PT. Supreme Energy Muara Laboh must

manage the impact through socio-

economic and institutional approach

namely by giving priority to the

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

community located closest to the

location affected by the planned

activities and thereafter reaching

the other communities in Solok

Selatan District.

3. Submitting the report on the result

of the implementation of such

activities, RKL and RPL report to the

Head of Solok Selatan District, and

other relevant Technical Institutions

in Solok Selatan District every six

(6) months;

4. If in the futre there is a change of

business and/or activities according

to the criteria for the amendment as

set forth in Article 50 of Government

Regulation of the Republic of

Indoensia No. 27 of 2012 on the

Environmental Permit, the person in

charge for the business and/or

activities shall submit an

application for such change to the

Head of the District and relevant

institutions in order that all

necessary steps can be taken;

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

5. According to the provision of Article

74 of Law No. 32 of 2009 on

Environmental Protectoin and

Management, PT. Supreme Energi Muara

Laboh shall give an access to the

Regioinal Environmental Supervisory

official for performing supervisory

duties.

SIXTH : This Decree shall be declared VOID in the

future if:

1. It is found that there is a violation of

AMDAL documents and amendments thereto and

the Environmental Permit as provided for

in Article 37 paragraph (2) of Law No. 32

of 2009 on the Environmental Permit.

2. The planned business and/or activities is

not implemented within a period of three

(3) years since the issuance of this

Decree.

3. The change of business and/or activity is

in accordance with the criteria of

amendment as set forth in Article 50 of

Government Regulation No. 27 of 2012 on

the Environmental Permit

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

SEVENTH Any failure and/or deviation by PT. Supreme

Energy Muara Laboh to comply with this decree

may be subject to a sanction according to the

prevailing laws and regulations.

EIGHT By the issuance of this Decree, the Decree of

the Head of Solok Selatan District No.

660.324-2013 on the Environmental Permit on

the Planned Activity of Geothermal Development

for PLTP Muara Laboh 250 MW in Solok Selatan

District, West Sumatra Province by PT. Supreme

Energy Muara Laboh is declared no longer

valid.

NINTH The validity period of this environmental

permit is the same as that of the business

and/or activity permit to the extent there is

no change as provided under Article 50 of

Government Regulation No. 27 of 2012 on the

Environmental Permit.

TENTH If in the future there is an error in this

decree, it shall be duly corrected.

ELEVENTH : This Decree shall be effective as of the date

of its establishment.

Established in Padang Aro

On 14th of January 2015

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

HEAD OF SOLOK SELATAN

DISTRICT

[Signed][Sealed]

MUZNI ZAKARIA

Copies delivered to:

1. The Minister of the Environment in Jakarta

2. Governor of West Sumatra in Padang

3. BAPEDALDA (Regional Agency for Environmental Impact

Control) of West Sumatra Province in Padang

4. BAPPEDA dan Penanaman Modal (Regional Agency for

Development Plannning and Investment) of Solok Selatan

District in Padang Aro

5. Energy and Mineral Resources Service Office, Solok

Selatan District in Padang Aro

6. Forestry and Plantation Service Office, Solok Selatan

District in Padang Aro

7. General Service and Licencing Office, Solok Selatan

District in Padang Aro

8. AMDAL Assessment Committee, Solok Selatan District

9. File

ATTACHMENT II : DECREE OF THE HEAD OF SOLOK SELATAN DISTRICT

NUMBER : 660-27-2015

DATE : January 14, 2015 ON AMENDMENT TO DECREE OF THE HEAD OF SOLOK

SELATAN DISTRICT NUMBER 660.324-2013 ON THE ENVIRONMENTAL

PERMIT FOR THE PLANNED GEOTHERMAL DEVELOPMENT FOR 250 MW

MUARA

LABOH GEOTHERMAL POWER PLANT IN SOLOK SELATAN DISTRICT, WEST

SUMATRA PROVINCE BY PT. SUPREME ENERGY MUARA LABOH

MATRIX OF ENVIRONMENTAL MONITORING PLAN FOR PT. SUPREME ENERGY MUARA LABOH ACTIVITIES

A. Pre-Construction Stage 1. Change in Success indicator of Land  The data shall The monitoring PT SEML   Environmental  Environmental Ownership and management is the acquisition be collected by shall be Service Service Office Control over change of ownership observation and conducted at Office of of Solok land and control over land interviews Pauh Duo Sub- Solok Selatan Selatan which does not create  Data analysis district and District  Energy and conflicts shall be Sangir Sub-  Pauh Duo Sub- Mineral conducted in a district district Resources comparative and government (ESDM) Service descriptive  Land Office of qualitative Management Solok Selatan manner Office of District Solok Selatan  Land  Nagari Management

PT Supreme Energy Muara Laboh 76 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

fugitive emission injection well with TSP residential shall be District  ESDM Service and TSP dispersion drilling as sampling in area where conducted  ESDM Service Office shall comply with well as ambient air there is an twice, that Office of District the TSP ambient production using a high access road is once in Solok Selatan  Director standard under well testing volume sampler to the the dry General of New Government and emission  Data analysis project site season and Renewable

Regulation No. 41 and dispersion using SNI 19-  H2S gas in once in the Energy and or 1999 (TSP of the stack 7119.3-2005 ambient air rainy Energy ambient Standard < of the cooling  Measurement of at a distance season Conservation 3 tower of the during the 230 µg/Nm ) H2S data in of: (EBTKE)  Gas emission and Geothermal ambient air ->500m from constructio dispersion from Power Plant Cooling Tower n stage the stack of -> 1,000m from Cooling Tower Cooling Tower during the operation of the Geothermal Power Plant

 H2S gas emission under Regulation of the Minister of the Environment No. 21 of 2008 on

H2S Emission Standards (< 35 mg/Nm3)  Odor Level under Decision of the Minister of the Environment No. 50

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

3 H2S < 28 µg/Nm ) 2. Change in Noise  Noise level shall Production  Measurement of  Measurement The PT SEML  KLH of Solok  KLH of Solok Level comply with the well drilling, noise level of noise monitoring Selatan Selatan standard for the injection using a sound level at the shall be District District community wells, testing level meter settlement conducted  ESDM Service  ESDM Service settlement which of production  Data analysis adjacent to twice, that Office of Office of is < 55 dB(A) and wells in accordance the project is once in Solok Selatan Solok Selatan industry < 70 with Decision access road the rainy District District season and dB(A) under of the  Measurement  Director once in the Decision of the Minister of of noise General of New dry season Minister of the the level in the Renewable during the Environment No. 48 Environment working Energy and constructio of 1996 No. 48 of 1996 environment Energy n stage  Particularly for at the Conservation the project location of (EBTKE) personnel, the the noise level shall Geothermal comply with the Power Plant Threshold for the and wellpads workplace under adjacent to Circular Letter of the community the Minister of settlement Manpower No. 01/MEN/97 (Noise level threshold for workplace < 85 dB(A) 3. Change in The erosion rate Land clearing  Measurement of Erosion prone The PT SEML  KLH of Solok  KLH of Solok

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis erosion and shall be controlled land erosion areas at access monitoring Selatan Selatan sedimentation in accordance with using Petak road segments, shall be  ESDM Service  ESDM Service Decision of the Kecil (small wellpad area conducted Office of Office of Director General of parcel) method and PLTP area twice, that Solok Selatan Solok Selatan Reforestation and  Measurement of is once in District District Rehabilitation, the rainfalls the rainy  Director Ministry of Forestry season and General of No. 041/Kpts/V/1998 once in the EBTKE (< 15 dray season tons/hectare/annum) during the constructio n stage 4. Change in Sediment entering the Land clearing Sediment charge  Sediment The PT SEML  KLH of Solok  KLH of Solok surface water river being under sampling at the charge from monitoring Selatan Selatan run-off rate control pursuant to catchpond inlet PLTP project shall be District District Government Regulation and outlet, site area conducted  ESDM Service  ESDM Service No. 82 of 2001 thereafter the TDS  Catchpond twice, that Office of Office of (<50mg/L) laboratory inlet and is in the Solok Selatan Solok Selatan analysis using SNI outlet rainy District District 06-6989.3-2004 and season and  Director for effectiveness dry season General of of the catchpond during the EBTKE constructio n stage 5. Change in TSS content in the - Land - River TSS - Sediment Monitoring PT. SEML  KLH of Solok  KLH of Solok surface water river being under clearing sampling charge from shall be Selatan Selatan quality control = TSS - Production - Suspended PLTP Project conducted District District baseline in Liki well Residue site twice, that  ESDM Service  ESDM Service river, that is 4 mg/L drilling, Sampling (TSS), - Catchpond is in the Office of Office of and maximum < 50 mg/L Injection then conducting inlet and rainy Solok Selatan Solok Selatan

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

pursuant to Well laboratory outlet, season and District  Director Government Regulation drilling analysis using representing dry season General of No. 82 of 2001. and SNI 06-6989,3- easily during EBTKE Production 2004 manageable constructio Well sediment n stage Testing - TSS sampling shall be taken from Bangko Jernih, Bangko Keruh and Liki rivers at: - The outfall, - 20 m outfall upstream, - 100 m outfall downstream, - 200 m outfall downstream Representing the sediment passing to the river 6. Disturbance to Land opened as Land clearing  Data collection Environmental The PT SEML  KLH of Solok  KLH, and ESDM terrestrial required method by monitoring at monitoring Selatan Service Office

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

flora and fauna inventorying/di the site to be shall be  ESDM Service of Solok rect opened and the conducted Office of Selatan observation on one that has twice prior Solok Selatan District the opened area been covered to and District  Director and the area with following  Forestry and General of re-covered with vegetation. the land Plantation EBTKE vegetation clearing Service  Data analysis during the Office of by vegetation constructio Solok Selatan analysis n stage District 7. Disturbance to  Change in the  Land Data analysis of Rivers close to Monitoring PT SEML  KLH of Solok  KLH of Solok aquatic biota composition of clearing the quantity, the activity shall be Selatan Selatan aquatic biota at  Production type, composition, location (Banko conducted District District the opened land well abundance, and Jernih, Bangko in the  ESDM Service  ESDM Service  Change in aquatic drilling, diversity of Keruh and Liki rainy and Office of Office of biota composition injection plankton and rivers) dry seasons Solok Selatan Solok Selatan well bentos types during the District District constructio drilling  The director n stage and general of production EBTKE well testing 8. Opening of Quantity and Manpower  Secondary data Surrounding the Once in 6 PT SEML  KLH of Solok  KLH of Solok Employment proportion of local recruitment collection from activity (six) Selatan Selatan Opportunity manpower that can be PT SEML HRD location (Pauh months District District absorbed during the department, Duo Sub- during the  ESDM Service  ESDM Service construction stage  Data analysis district and constructio Office of Office of Solok shall be Sangir Sub- n stage Solok Selatan Selatan district) conducted in a District  Director comparative and General of

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis qualitative EBTKE descriptive manner 9. Opening of  Quantity and  Recruitment  Secondary data Surrounding the Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM and Business proportion of of Manpower collection from activity (six) and Sosnakertrans Opportunities local manpower  Termination PT SEML HRD location (Pauh months Sosnakertrans Service Office that can be of department Duo Sub- during the Service of Solok absorbed during employment  Data analysis district and constructio Office of Selatan the construction shall be Sangir Sub- n stage Solok Selatan  Director stage conducted in a district) District General of  Quantity and comparative and EBTKE proportion of new qualitative business that can descriptive be conducted manner 10. Change in Increase in  Recruitmen  Collection of Around the Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, community's community's income t of secondary data location of (six) Sosnakertrans Sosnakertrans income due to recruitment of Manpower from PT SEML's activities months Service Service Offices manpower at the  Terminatio HRD department (Pauh Duo Sub- during Offices of of Solok construction stage n of  Data analysis district and constructio Solok Selatan Selatan employment conducted in a Sangir Sub- n stage District District comparative and district)  Local  Director qualitative government of General of descriptive Nagari, KAN EBTKE manner 11. Change in Social Change in social  Recruitment  Recording of the Around the Once in 6 PT SEML  KLH, ESDM  KLH, ESDM Norms and Values norms and values as of Manpower data resulted location of (six) Service Service Office, well as local  Termination from official activities months Office, Sosnakertrans tradition of and unofficial (Pauh Duo Sub- during Sosnakertrans Service Office employment meetings with district and constructio Service Office of Solok members and Sangir Sub- n stage of Solok Selatan

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis leaders of the district) Selatan District community District  Director  Data analysis  Local General of shall be government of EBTKE conducted in a Nagari, KAN comparative and qualitative descriptive manner 12. Change in  Lessening of  Recruitment  Collection of Around the Once in 6 PT SEML  KLH, ESDM  KLH, ESDM Community negative perception of Manpower data of location of (six) Service Service Office, perception to the recruitment  Production community activities months Office, Sosnakertrans of manpower at the well perception (Pauh Duo Sub- during Sosnakertrans Service Office construction stage drilling and  Data analysis district and constructio Service Office of Solok  Lessening of injection conducted in a Sangir Sub- n stage of Solok Selatan negative perception well comparative and district) Selatan District to the production drilling, qualitative District  Director well drilling and production descriptive  Local General of injection well well testing manner government of EBTKE drilling, and Nagari, KAN production well construction testing at the of PLTP construction stage as well as construction of PLTP 13. Public Health  Parameters Production  Interviews with Around the Once in 6 PT SEML  KLH, ESDM  KLH, ESDM Disorder/Deterio monitored are types well drilling, the management location of (six) Service Service Office, ration of public of environmental- injection well of the project activities months Office, Health Health Service health based diseases. drilling and and collection (Pauh Duo Sub- during Service Office Office of Solok

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

 Scope of production of secondary district and constructio of Solok Selatan environmental well testing data from the Sangir Sub- n stage Selatan District sanitation such as Puskesmas district) District  Director supply of clean (Public Health  Local General of water, toilets, Centre) government of EBTKE healthy houses and  Interviews with Nagari, KAN solid waste community management leaders or healthcare cadre related to the environmental- based diseases C. Operation Stage 1. Change in Air  Air quality from  Production  Measurement of  In The PT SEML  KLH, ESDM  KLH, ESDM Quality fugitive emissions well ambient air residential frequency Service Office Service Office and TSP meet TSP drilling and with TSP areas, access of of Solok of Solok ambient standard injection sampling in the road to the monitoring Selatan Selatan requirement in well air using the project shall be District District once in 6 accordance with drilling, high volume  H2S gas in  Director Government production sampler ambient air (six) General of Regulation No. 41 well  Data analysis with the months, EBTKE of 1991 (Ambient testing, method based on following that is in TSP Standards < 230 emission and SNI 19-7119.3- distances: the dry 3 season and µg/Nm ) dispersion 2005  At the rainy  Emission and gas of H2S from  Measurement of fence the stack of season from the stack of H2S gas data in boundary of during the Cooling Tower the Cooing ambient air the PLTP Tower during operation during operation of  300m from operation of stage the PLTP the fence the PLTP  H2S gas emission of the PLTP

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

shall meet the  Commissionin  Location of Standards in g sample taking accordance with  Operation shall be Regulation of the and turbine adjusted to Minister of the and the wind Environment No. 21 condensate direction

of 2008 on H2S Emission Standards (< 35 mg/Nm3)  Odor Level shall

meet the H2S Standards in accordance with Decision of the Minister of the Environment No. 50 of 1996 2. Change in noise  The noise level  Production  Measurement of  Measurement of Once in 6 PT SEML  KLH, ESDM  KLH, ESDM level meets the well noise level with noise level in (six) Service Office Service Office requirement. i.e. drilling, sound level residential months of Solok of Solok < 55 dB(A) and for injection meter areas during Selatan Selatan industry < 70 well  Data analysis in  Measurement of operation District District dB(A) in drilling, accordance with noise level in stage  Director accordance with production Decision of working General of Decision of well Minister of the environment EBTKE Minister of the drilling, Environment No. Environment and testing 48 of 1996 48/1996 well  Particularly for drilling manpower for the  Commissionin

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis outfall 200 m downstream from the outfall representing sediments flowing through the river 4. Disturbance to Change in composition Production Data analysis, Rivers close to Once in 6 PT SEML  KLH, ESDM  KLH, ESDM aquatic biota of aquatic biota well drilling, number of types, the locations (six) Service Office Service Office injection well composition, of activities months of Solok of Solok drilling, abundance, (Banko River, during Selatan Selatan production biodiversity of Bangko Keruh operation  Director well testing plankton and and Liki stage General of and operation bentos Rivers) EBTKE and maintenance of PLTP wells 5. Creation of Quantity and Recruitment of  Collection of Around the Once in 6 PT SEML  KLH, ESDM  KLH, ESDM Employment proportion of local manpower secondary data location of (six) Service Office Service Office opportunity manpower that can be from HRD activities months of Solok of Solok absorbed during department of PT (Pauh Duo Sub- during Selatan Selatan operation stage SEML district and operation District District  Data analysis Sangir Sub- stage  Director shall be district) General of conducted in a EBTKE comparative and qualitative manner 6. Creation of Quantity and Recruitment of  Collection of Around the Once in 6 PT SEML  KLH, ESDM and  KLH, ESDM,

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis Business proportion of manpower secondary data locations of (six) Sosnakertrans Sosnakertrans Opportunity businesses that can from HRD the activities months Service Service Offices be absorbed during department of PT (Pauh Duo Sub- during Offices of of Solok the operation stage SEML district and operation Solok Selatan Selatan  Data analysis Sangir Sub- stage District District conducted in a district)  Local  Directorate comparative and government of General of qualitative Nagari, KAN EBTKE descriptive manner 7. Change in Increase in local Recruitment of  Collection of Around the PT SEML  KLH, ESDM,  KLH, ESDM, Community's community's income manpower secondary data location of Sosnakertr Sosnakertrans Income due to increase in from HRD activities ans Service employment department of PT (Pauh Duo Service Offices of opportunity during SEML District and Offices of Solok Selatan the operation stage  Data analysis Sangir Solok District shall be District) Selatan  Director conducted in a District General of comparative and  Local EBTKE descriptive Government qualitative of KAN, manner Nagari 8. Change in Social Change in social Recruitment of  Recording the Around the Once in 6 PT SEML  KLH, ESDM,  KAN, ESDM, Norms and Values norms and values as manpower data resulted locations of (six) monts Sosnakertrans Sosnakertrans well as local from official activities during of Solok of Solok tradition and unofficial (Pauh Duo Sub- operation Selatan Selatan meetings with district and stage District District members of Sangir Sub-  Local  Director leaders of the district) Government of General of community Nagari, KAN EBTKE

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

 Data analysis shall be conducted in a comparative and descriptive qualitative manner 9. Change in  Lessening of  Recruitment  Collection of Around the Once in 6 PT SEML  KLH, ESDM and  KLH, ESDM, community negative perception of manpower data on locations of (six) Sosnakertrans Sosnakertrans perception about land  Production community the activities months Service Office of Service acquisition and well perception (Pauh Duo Sub- during the of Solok Office offices manpower drilling and  Data analysis district and operation Selatan of Solok recruitment during injection shall be Sangir Sub- stage District Selatan the operation stage well conducted in a district)  Local  Directorate  Lessening of drilling, comparative and Government of General of negative perception production qualitative Nagari EBTKE about production well testing descriptive well drilling and as well as manner injection well operation drilling as well as and operation and maintenance maintenance of the of the wells wells and PLTP and PLTP 10. Disorder of  Parameters Production  Interviews with Around the Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, and Public monitored are well drilling, the management locations of (six) Health Service Health Service Health/Deteriora environment-based injection well of the project the activities months Offices of Office of Solok tion of public diseases due to drilling and and collection (Pauh Duo Sub- during Solok Selatan Selatan health deterioration of production of secondary district and operation District District environmental well testing data from the Sangir Sub- stage  Local  Directorate quality as well as Puskesmas district) government of General of

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

 Coverage of operation and (Public Health Nagari, KAN EBTKE environmental maintenance of Centre) sanitation facility the wells and  Interviews with PLTP community leaders and health cadre in connection with the pattern of environment- based diseases D Post-Operation Stage 1. Change in Controlled erosion Rehabilitation Measurement of Erosion prone Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, erosion and rate in accordance /Re-vegetation soil erosion using area at the (six) Health Service Health Service sedimentation with Decision of the the small land access road months Offices of Offices of Director General of parcel method segment, during the Solok Selatan Solok Selatan Reforestation and wellpad and post District District Rehabilitation of the PLTP areas. operation  Local  Directorate Ministry of Forestry stage government of General of No. 041/Kpts/V/1998 Nagari,, KAN EBTKE (< 15 tons/ha/annum) 2. Change in Sediment loads Rehabilitation Sampling of  Sediment Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM surface water flowing into the /Re-vegetation sediment loads at loads from (six) Service Service Offices run-off rate river are controlled the inlet and the PLTP months Offices of of Solok in accordance with outlet catch, project site during the Solok Selatan Selatan Government Regulation thereafter the area post- District District No. 82 of 2001 (< 50 laboratory  Inlet and operation  Directorate mg/L) analysis of the outlet catch stage General of Suspended Solid pond, EBTKE (TSS) using the representing method as ruled in the sediment

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis SNI 06-6989.3-2004 that can be conducted managed well simultaneously to identify the effectiveness of the catch pond. 3. Change in The TSS content in Rehabilitation  The TSS sampling The sampling of Once in 6 PT SEML  KLH, ESDM  KLH, ESDM surface water the river being /Re-vegetation of the river the TSS was (six) Service Service Offices quality controlled = TSS  The Sampling of taken from months Offices of of Solok baseline of Liki Suspended Bangko Jernih during the South Selatan Selatan Disrict River, that is 4 mg/L Residue (TSS), River, Bangko post District  Directtor and at the maximum < then analyzed in Keruh River and operation General of 50 mg/L in accordance the laboratory Liki River at: stage EBTKE with Government using the method  The river Regulation No. 82 of as described in outfall 2001. SNI 06-6989.3-  20 m upstream 2004. from the outfall  100 m downstream from the outfall Representing the sediments flowing into the rivers. 4. Disturbance to Area of the land Rehabilitation  Collection of Monitoring Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, terrestrial being vegetated, /Re-vegetation data/direct shall be (six) Hutbun Hutbun Service flora and fauna types of observation on conducted on months Service Offices of flora/vegetation the area to be the area to be Offices of Solok Selatan

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Environmental Impacts Monitored Forms of Environmental Monitoring Environmental Management Institution Methods for Data No. Source of Monitoring Undertaking Supervising Type of Impact Indicator/Parameter Collection and Frequency Report Recipients Impact Location Party Party Analysis planted and level of covered with the covered with Solok Selatan Distrit growth success of the vegetation the vegetation District  Directorate vegetation plant,  Data analysis of General of existence of the vegetation EBTKE flora protected by analysis and referring to Government Regulation No. 07 of 1999 as well as biodiversity index 5. Disturbance to Change in composition Rehabilitation Analysis of data Rivers close to Once in 6 PT SEML  KLH, ESDM  KLH, ESDM aquatic biota of aquatic biota /Re-vegetation of quality, locations of (six) Service Service Offices composition, activities months Officse of of Solok abundance, (Bangko Jernih during Solok Selatan Selatan diversity of River, Bangko post- District District plankton and Keruh and Liki operation  Director bentos River) stage General of EBTKE 6. Decrease in Quantity and Termination of  Collection of Around the Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, Employment proportion of employment secondary data locations or (six) Sosnakertrans Sosnakertrans Opportunity unemployment due to from HRD activities months Service Service Offices termination of department of PT (Pauh Duo Sub- during Offices of of Solok employment in project SEML district and post- Solok Selatan Selatan activities  Data analysis Sangir Sub- operation District District shall be district) stage  Local  Director conducted in a Government of General of comparative and Nagari, KAN EBTKE qualitative descriptive manner

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

7. Decrease in Number and proportion Termination of  Collection of Around the Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, Business of business due to employment secondary data locations of (six) Sosnaktertrans Sosnakertrans Opportunity post-operation stage from HRD activities months Service Service Offices which decrease during department of (Pauh Duo Sub- during Offices of of Solok post-operation stage PT SEML district and post- Solok Selatan Selatan  Data analysis Sangir Sub- operation District District shall be district) stage  Local Nagari,  Director conducted in a KAN General of comparative and EBTKE qualitative descriptive manner 8. Change in Decreasing income of Termination of  Collection of Around the Once in 65 PT SEML  KLH, ESDM,  KLH, ESDM, community’s local community due employment secondary data locations of (six) Sosnakertrans Sosnakertrans income to termination of from HRD activities months Service Service Offices employment during the department of PT (Pauh Duo Sub- during the Offices of of Solok post-operation stage SEML district and post- Solok Selatan Selatan  Data analysis Sangir Sub- operation District  Director shall be district) stage  Local General of conducted in a Government of EBTKE comparative and Nagari, KAN qualitative descriptive manner 9. Change in  Lessening of  Closing of  Collection of Around the Once in 6 PT SEML  KLH, ESDM,  KLH, ESDM, community negative production secondary data locations of (six) moths Sosnakertrans Sosnakertrans perception perception due to wells, from HRD activities during Service Service Offices the closing of injection department of PT (Pauh Duo Sub- post- Offices of of SOlok production wells, wells, SEML district and operation Solok Selatan Selatan injection wells demolition  Data analysis Sangir Sub- stage District District

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

and supporting of pipeline shall be district)  Local  Director activities as well network and conducted in a Government of General of as demolition of supporting comparative and Nagari, KAN EBTKE pipeline network facilities qualitative as well as as well as descriptive demolition of PLTP demolition manner during post- of PLTP operation stage  Termination  Lessening of of negative employment perception due to termination of employment during post-operation stage E. Monitoring of Other Impacts 1.  Non-industrial  Complying with  Domestic  Measuring  Location of During the PT SEML  KLH, ESDM,  KLH, ESDM, solid wastes: Regulation of the solid quantity of domestic waste constructio Sosnakertrans Sosnaketrans wastes Minister of EMR wastes; solid wastes final disposal n until Service Service Offices transported to No. 045 of 2006 on  Sewage from produced flowing area (TPA) operation Offices of of Solok the TPA (Final Requirements for domestic into and  Domestic waste stage: Solok Selatan Selatan Disposal Area) Treatment of waste water discharged to water  Solid District District  Domestic Drilling Muds; and treatment the TPA; treatment wastes:  Director liquid wastes: installatio  Collecting, installation any time General of (BOD, COD, TSS n (IPAL); preparing and (IPAL) the solid EBTKE and pH) and analyzing the waste is  Types and sample of water discharge quantity of from the outlet d to the hazardous and of all domestic TPA; toxic waste water  IPAL:

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Head of Solok Selatan District

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

[Signed][Sealed]

MUZNI ZAKARIA

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Jakarta, January 5, 2015

PREFACE

PT. Supreme Energy Muara Laboh (PT SEML), a company owned by PT Supreme Energy, GDF Suez (a company domiciled in

France), and Sumitomo Corporation (a company domiciled in

Japan), plan to conduct "Geothermal Development Activities for the 250 MW Muara Laboh Geothermal Power Plant in South

Solok Regency, West Sumatra Province".

In accordance with regulations on the environment, the

Geothermal Development Activities for 250 MW Muara Laboh

Geothermal Power Plant (PLTP Muara Laboh 250 MW) are equipped with AMDAL documents since 2013 and have obtained approval from the Head of Solok Selatan District under

Decree of the Head of Solok Selatan District Number

660.323-2013 on Environmental Feasibility of the Planned

Geothermal Development Activities for 2500 MW Muara Laboh

Geothermal Power Plant in Solok Selatan District, West

Sumatra Province by PT. Supreme Energy Muara Laboh and the

Environmental Permit issued by the Head of Solok Selatan

District under Decree Number 660.324-2013 on the

Environmental Permit for the Planned Geothermal Development

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Activities for 250 MW Muara Laboh Geothermal Power Plant

(PLTP Muara Laboh 250 MW) in Solok Selatan District, West

Sumatra by PT. Supreme Energy Muara Laboh.

In 2015, PT SEML planned to conduct the deveopment by changing the location of PLTP Muara Laboh 250 MW to the new location, besides it also planned to have additional 7

(seven) Exploitation wellpads and supporting facilites which have not been previously stated in the AMDAL

Documents of 2013. Pursuant to the letter from

Environmental Service Office of Solok Selatan District

Number 660/303/KLJ/XI-2014 this new expansion shall be subject to preparation of ANDAL and RKL-RPL Addendum

Documents.

PT. SEML shall at all times be committed to the implementation of Occupational Safety, Health and

Environmental (SHE) Programs. Therefore, PT. SEML would express its gratitude to all parties who have provided their supports and extend their cooperation in preparing these documents. Hopefully, these ANDAL and RKL-RPL

Documents may become a good start for the development of this project.

Sincerely Yours,

PT Supreme Energy Muara Laboh

100

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

101

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

TABLE OF CONTENTS

Table of Contents

PREFACE ...... 99

TABLE OF CONTENTS ...... 102

LIST OF ATTACHMENTS ...... 108

LIST OF TABLES ...... 110

LIST OF FIGURES ...... 118

LIST OF MAPS ...... 122

LIST OF TERMS/ABBREVIATION...... 124

CHAPTER I INTRODUCTION ...... 128

1.1 BACKGROUND ...... 128 1.2 PURPOSE AND OBJECTIVE OF THE PREPARATION OF ADDENDUM TO ENVIRONMENTAL IMPACT ANALYSIS AND RKL-RPL ...... 133 1.2.1 Objective of the Study ...... 133 1.2.2 Purpose of Study ...... 134

CHAPTER II ACTIVITY PLAN ...... 136

2.1 IDENTITY OF THE ACTIVITY PROPONENT AND PREPARER OF ADDENDUM TO ENVIRONMENTAL IMPACT ANALYSIS AND ENVIRONMENTAL MANAGEMENT PLAN AND ENVIRONMENTAL MONITORING PLAN ...... 136 2.1.1 Identity of the Activity Proponent ...... 136 2.1.2 Identity Of The Person In-Charge Of The Activity ...... 136 2.1.3 Identity of Preparer of Adendum to Environmental Impact Analysis and RKL-RPL ...... 137 2.2 BUSINESS AND/OR ACTIVITY LOCATION ...... 143 2.3 SUITABILITY OF ACTIVITY LOCATION WITH SPATIAL LAYOUT ...... 144 2.4 HISTORY OF DEVELOPMENT AND ACTIVITIES IN PROGRESS ...... 152 2.5 ACTIVITIES THAT HAVE BEEN AND WILL BE UNDERTAKEN ...... 159 2.5.1 Wellpad Prospects ...... 159 2.5.2 Selection of Production Capacity of Geothermal Power Plant ...... 160 2.5.3 Planned Drilling Activity at Wellpad A dan H ...... 162 2.6 PLANNED ADDITIONAL ACTIVITIES ...... 163

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

2.6.1 Planned Labor Recruitment ...... 163 2.6.2 Planned Addition of New Wellpads ...... 165 2.6.3 Planned Earthwork ...... 165 2.6.4 Planned Construction of 70 MW Geothermal Power Plant ...... 166 2.6.5 Planned Construction of Switchyard and Electricity Connection to PLN Transmission Grid...... 170 2.6.6 Planned Construction of Steam Gathering System ...... 174 2.6.7 Planned Construction of 1-Phase Fluid Pipelines ...... 183 2.6.8 Planned Construction of Project Facilities ...... 187 2.7 DESCRIPTION OF ENVIRONMENTAL MANAGEMENT PERFORMANCE ...... 193

CHAPTER III ENVIRONMENTAL BASELINE ...... 211

3.1 GEOPHYSICS-CHEMICAL COMPONENTS ...... 212 3.1.1 Climate ...... 212 3.1.1.1 Rainfall ...... 212 3.1.1.2 Speed and Wind Direction ...... 214 3.1.2 Air Quality ...... 215 3.1.3 Noise level ...... 218 3.1.4 Topography ...... 221 3.1.5 Physiology and Geology ...... 222 3.1.6 Geotechnics and Seismicity ...... 228 3.1.7 Hydrogeology...... 235 3.1.8 Hydrology ...... 239 3.1.9 Water Quality ...... 245 3.1.9.1 Surface Water Quality ...... 245 3.1.9.2 Shallow Well Water Quality ...... 248 3.1.10 Soil Quality ...... 250 3.2 BIOLOGICAL COMPONENT ...... 257 3.2.1 Terrestrial flora and fauna ...... 257 3.2.1.1 Flora ...... 257 3.2.1.2 Fauna ...... 277 3.2.2 Aquatic Biota ...... 288 3.2.2.1 Plankton ...... 288 3.2.2.2 Bentos ...... 293 3.3 SOCIO-ECONOMIC CULTURE AND PUBLIC HEALTH ...... 298 3.3.1 Socio-economic culture ...... 298 3.3.1.1 Population ...... 298 3.3.1.2 Employment Opportunities ...... 309 3.3.1.3 Business Opportunities ...... 310 103

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

3.3.1.4 Community Income ...... 311 3.3.2 Socio-cultural ...... 313 3.3.2.1 Values and Social Norms ...... 313 3.3.2.2 Level of Education ...... 325 3.3.2.3 Religion and Beliefs ...... 329 3.3.2.4 Institutionalism ...... 333 3.3.2.5 Ownership and Land Tenure ...... 334 3.3.2.6 Community Perception ...... 336 3.4 PUBLIC HEALTH ...... 344 3.4.1 Ilnesses Pattern ...... 346 3.4.2 Access to Public Health Services ...... 347 3.4.3 Basic Sanitation Facilities ...... 349 3.5 TRANSPORTATION ...... 356 3.5.1 Road and Transportation Facilities in Location of Study ...... 356 3.5.2 Road User Safety Facilities ...... 360 3.5.3 Low Awareness of Good Traffic Attitude ...... 362 3.6 OTHER ACTIVITIES AROUND PLANNED LOCATION ...... 365

CHAPTER IV SCOPE OF STUDY ...... 368

4.1. SCOPING PROCESS ...... 368 4.1.1. Potential Impact Identification ...... 368 4.1.2 Potential Impact Evaluation ...... 376 4.1.2.1 Pre-construction stage ...... 376 4.1.2.2 Construction Stage ...... 376 4.1.2.3 Operation Stage ...... 384 4.1.2.4 Post-operation Stage ...... 387 4.1.3 Hypothetical Significant Impacts ...... 394 4.2 STUDY AREA BOUNDARIES AND STUDY TIMELINE ...... 398 4.2.1 Study Area Boundaries ...... 398 4.2.1.1 Project Boundaries ...... 399 4.2.1.2 Ecological Boundaries...... 399 4.2.1.3 Social Boundaries ...... 399 4.2.1.4 Administrative Boundaries ...... 400 4.2.2 Study Timeline ...... 400

CHAPTER V PREDICTED SIGNIFICANT IMPACTS AND EVALUATION OF SIGNIFICANT IMPACTS ...... 403

5.1 PREDICTED SIGNIFICANT IMPACTS ...... 403

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

5.1.1 Pre-Construction Stage ...... 406 5.1.1.1 Land Clearance...... 406 5.1.2 Construction Stage ...... 408 5.1.2.1 Recruitment of Workers ...... 408 5.1.2.2 Termination of employment ...... 414 5.1.2.3 Production Well Drilliing Activities ...... 417 5.1.2.4 Well production testing activities ...... 419 5.1.2.5 Land Clearing Activities ...... 444 5.1.3 Operation Stage ...... 467 5.1.3.1 Labor recruitment ...... 467 PLTP Operation Activities ...... 471 5.1.3.3 Commisisioning...... 512 5.1.3.4 Operation of Turbine and Condensor ...... 515 5.1.4 Post Operation Stage ...... 525 5.2 IMPACT EVALUATION ...... 526 5.2.1 Physico-Chemical Components ...... 526 5.2.1.1 Study of Impact of Drilling and Well Production Test ...... 527 5.2.1.2 Study of Impact of PLTP Operation ...... 530 5.2.2 Biological Component ...... 536 5.2.2.1 Flora-Fauna Diversity ...... 536 5.2.2.2 Aquatic Biota Diversity ...... 537 5.2.3 Socio-Economical and Cultural Components ...... 538 5.2.3.1 Employment Opportunities ...... 538 5.2.3.2 Business Opportunity ...... 539 5.2.3.3 Community Income ...... 540 5.2.3.4 Social Values and Norms ...... 541 5.2.3.5 Land Tenure ...... 542 5.2.3.6 People’s Perception ...... 543 5.2.4 Public Health Component ...... 545 5.3 DIRECTIVES FOR THE MANAGEMENT OF ENVIRONMENTAL IMPACT ...... 551 5.3.1 Guidelines and Direction of Impact in Pre Construction Stage ...... 555 5.3.2 Guidelines and Direction of Impact in Construction Stage ...... 557 5.3.3 Guidelines for the Management of Impact of the Operation of PLTP ...... 568 5.3.4 Guidelines for and Directions of Management of Impact during Post Operation Stage ...... 576 5.4 RECOMMENDATION FOR ENVIRONMENTAL FEASIBILITY ...... 580

CHAPTER VI ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN (RKL-RPL) ...... 583 105

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

6.1. ENVIRONMENTAL MANAGEMENT PLAN ...... 583 6.1.1 Preconstruction Stage ...... 583 6.1.1.1 Socio-Economic and Culture Components ...... 583 6.1.1.1.2 Community Perception ...... 585 6.1.2 Construction Stage ...... 588 6.1.2.1 Physical and Chemical Components ...... 588 6.1.2.2 Biological Components ...... 599 6.1.2.3 Socio-Economic and Culture Components ...... 603 6.1.2.4 Public Health Components ...... 614 6.1.3 Operation Stage ...... 616 6.1.3.1 Physical-Chemical Components ...... 616 6.1.3.2 Biological Components ...... 623 6.1.3.3 Socio-Economic and Culture Components ...... 624 6.1.3.4 Public Health Components ...... 636 6.1.4 Post Operation Stage ...... 638 6.1.4.1 Physical-Chemical Components ...... 638 6.1.4.2 Biological Components ...... 644 6.1.4.3 Socio-Economic and Culture Components ...... 647 6.1.5 Management Of Other Impacts ...... 656 6.2 ENVIRONMENTAL MONITORING PLAN ...... 705 6.2.1 Pre-Construction Stage ...... 705 6.2.1.1 Socio-Economic and Culture Components ...... 705 6.2.2 Construction Stage ...... 708 6.2.2.1 Physical and Chemical Components ...... 708 6.2.2.2 Biological Components ...... 718 6.2.2.3 Socio-Economic and Culture Components ...... 721 6.2.2.4 Public Health Components ...... 730 6.2.3 Operation Stage ...... 732 6.2.3.1 Physical and Chemical Components ...... 732 6.2.3.2 Biological Components ...... 738 6.2.3.3 Socio-Economic and Culture Components ...... 740 6.2.3.4 Public Health Components ...... 749 6.2.4 Post Operation Stage ...... 751 6.2.4.1 Physical and Chemical Components ...... 751 6.2.4.2 Biological Components ...... 756 6.2.4.3 Socio-Economic and Culture Components ...... 759 6.2.5 Other Impact Monitoring ...... 766

STATEMENT LETTER ...... 806

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

107

LIST OF ATTACHMENTS

Attachment 1 Summary and List of Revisions Resulted from

Session of Discussion on ANDAL and RKL-RPL

Addendum with AMDAL Technical Team

Attachment 2 Summary and Llist of Revisions Resulted from

Session of Discussion on ANDAL and RKL-RPL

Addendum with AMDAL Committee

Attachment 3 Letter of Guidance for Preparation of

Environmental Documents issued by the

Environmental Service Office of Solok Selatan

District

Attachment 4 Statement Letter concerning Status of Land of

PT. Supreme Energy Muara Laboh issued by the

Forestry Service Office of Solok Selatan

District

Attachment 5 Relevant Statement Letter concerning Status of

Land of PT. Supreme Energy Muara Laboh in

connection with TNKS Area issued by Balai Besar

TNKS

Attachment 5 Statement Letter related to Status of Land of

PT. Supreme Energy Muara Laboh in connection

with TNKS Area issued by Balai Besar TNKS

Attachment 6 Letter concerning Conformity of RTRW (Spatial

Layout Management) of Solok Selatan District to

PT Supreme Energy Muara Laboh 108 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Planned Activities

Attachment 7 Decision on Liki Pinangawan Muara Laboh

Geothermal Working Area (WKP) and its Amendments

Attachment 8 Geothermal Mining Business License (IUP) and its

Amendments

Attachment 9 Permit for Taking and Utilization of Surface

Water (SIPA)

Attachment 10 Ex-HGU Confirmation Letter issued by BPN

(National Land Agency)

Attachment 11 Results of Laboratory Analyses

Attachment 12 Curriculum Vitae of ANDAL and RKL-RPL Document

Preparation Team Members

109

LIST OF TABLES

Table II-1 Composition of Experts for the 140

Preparation of Adendum to ANDAL dan RKL-

RPL

Table II-2 Result of Exploration Well Driling 155

Table II-3 Coordinates of Planned Additional New 164

Wellpads

Table II-4 Estimated Cut and Fill in Earthworks 165

Table II-5 Main Parameters of Dual Flash Geothermal 167

Power Plant

Table II-6 Size of HP Separator and LP Separator 177

Table II-7 Chemical Properties of Brine Separated 178

at Separator

Table II-8 Chemical Properties of NCG in Steam 180

Separated at Separator

Table II-9 Type of Wood and Fruit Plants Cultivated 194

in Nursery

Table II-10 Location of Environmental Monitoring 202

Points of SEML

Table III-1 Average Rainfall in the past 10 years 209

(2002 - 2011)

Table III-2 Result of Monitoring of Ambient Air 211

Quality Based on the Monitoring Report

for the 1st Period of 2014

PT Supreme Energy Muara Laboh 110 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Table III-3 Results of Measurement of Ambient Air 213

Quality, November 2014

Table III-4 Results of Monitoring of Noise Level 214

Based on Report on Monitoring for the

1st Period of 2014

Table III-5 Noise Levels at Locations of 215

Measurement, November 2014

Table III-6 Lithological Description 219

Table III-7 Erosion Hazard Levels At Project Area 236

Table III-8 Results of Monitoring of River Water 238

Quality Based on Report on Monitoring

for the 1st Period of 2014

Table III-9 Results of Monitoring of Community Well 242

Water Based on Report on Monitoring for

the 1st Period of 2014

Table III-10 Results of Soil Chemical Characteristics 245

Based on Report on Monitoring for the

1st Period of 2014

Table III-11 Results of Land Physics Based on Report 245

on Monitoring for the 1st Period of 2014

Table III-12 Test Results of Soil Sampling around 247

Activity Location 2014

Table III-13 Species of Trees found at Wellpad H 252

Location

Table III-14 Types of Saplings Found at Wellpad H 253

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Location

Table III-15 Types of Seedling/Herbs found at Wellpad 254

H Location

Table III-16 Types of Seedling / Herbs found at 254

Wellpad B Location

Table III-17 Types of Plants in the Proximity of 255

Planned Power Plant Location

Table III-18 Plant Species found Wellpad E Location 257

Table III-19 Types of Flora found at WP ML 09 258

Location

Table III-20 Results of Analysis of Tree Vegetation 263

Level in the proximity of WP- ML 06,

Coordinates S 01 37 57.8, E 101 08 12.3

Table III-21 Analysis Results of Sapling Vegetation 265

Level in the proximity of WP- ML 06,

Coordinates S 01 37 57.8 , E 101 08

12.3

Table III-22 Mammal Species Found at Activity 267

Location

Table III-23 Bird Species Found at Activities 268

Location

Table III-24 Fauna Species Found in the Proximity of 270

WL-09 Location

Table III-25 Fauna Species Found in the Proximity of 272

WL-06 Location

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Table III-26 Plankton Community in the Proximity of 278

Activity Location

Table III-27 River Benthos Community in around 284

Activity Location

Table III-28 Total Population and Distribution, Area 289

Size and Population Density in Solok

Selatan District by Sub-district 2013

Table III-29 Total Population, Total Number of 290

Families (KK) and Average [Number of

People within each Family] According to

Jorong in Nagari Alam Pauh Duo, 2011

Table III-30 Population Distribution by Age Group and 292

Gender in Solok Selatan District, 2013

Table III-31 Total Population According to Gender and 293

Sub-district in Solok Selatan District,

2013

Table III-32 Solok Selatan Population aged 15 years III-44

and above According to the Type of

Activity and Gender, 2011

Table III-33 Population Distribution According to the 296

Source of Income in Nagari Alam Pauh

Duo, 2011

Table III-34 Non-Agricultural Business in Nagari Alam 298

Pauh Duo

Table III-35 Total Population based on Gender, Number 306

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

of Households per Nagari in Pauh Duo

Sub-district, 2013

Table III-36 Population by Highest Level of Education 314

Completed and Gender, 2013

Table III-37 Number of Schools According toLevel of 316

Education and Status, 2013

Table III-38 Number of Education Facilities in Nagari 318

Alam Pauh Duo

Table III-39 Number of places of Worship According to 320

Nagari its Type in Pauh Duo Sub-

district, 2013

Table III-40 Number of Worship Facilities in Nagari 320

Alam Pauh Duo

Table III-41 Public Perception on PLTP activities in 327

Alam Pauh Duo Sub-district

Table III-42 Largest Number of Diseases in the Sangir 333

and Pakan Selasa Community Health

Centers

Table III-43 Types of Basic Sanitation in Puskesmas 338

Sangir and Pakan Selasa Work Areas

Table III-44 Length of Road (km) According to its 345

Surface and Governmental Authorization

Status in Solok Selatan District 2012

Table III-45 Number of Bridges and Road Segments 346

Based on Length

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Table III-46 Road Length (km) According to Type of 347

Road Surface

Table III-47 Number of Vehicles Passing Pekonina 351

Table IV-1 List of Potential Impacts of Geothermal 357

Development Activities for 250 MW Muara

Laboh Geothermal Power Plant

Table IV-2 Potential Impact Identification Matrix 362

for Geothermal Development Activities

for 250 MW Muara Laboh Geothermal Power

Plant

Table IV-3 Matriks of Hypothetical Significant 376

Impacts of Geothermal Development

Activities for 250 MW Muara Laboh

Geothermal Power Plant

Table IV-4 Hypothetical Significant Impacts of 381

Geothermal Development Activities for

250 MW Muara Laboh Geothermal Power

Plant

Table IV-5 Study Period Scoping 387

Table V-1 Percentage of Brine Formed from Wellpad 410

ML-A and ML-H

Table V-2 H 2S Gas Emission during Well Production 411

Test

Table V-3 Projected CO2 emissions in Indonesia 419

Table V-4 Rates of Erosion and Sediment Charge 430

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Table V-5 Erosion Rate Classification 432

Table V-6 Sediment charge Prior to Management 435

Table V-7 Sediment Charge after Being Managed 436

Table V-8 Surface Water Flow Rate 457

Table V-9 Types of Impacts of PLTP Operations V-36

Table V-10 Data of Cooling Tower for Calculation of 463

H2S Emissions

Table V-11 Characteristics of H2S Gas [and its 472

impacts] on Human’s Health

Table V-12 Projected CO 2 Emission in Indonesia 478

Table V-13 Propagation of Noise from Equipment 481

of Geothermal Power Plant (PLTP)

Table V-14 Propagation of Noise of PLTP 501

Equipment

Table V-15 Matrix of Impact Evaluation using 531

Modified Leopold Method on Geothermal

Development Activities for 250 MW

Muara Laboh Geothermal Power Plant

Table VI-1 Environmental Management Plan Matrix for 641

Geothermal Development Activities for

250 MW Muara Laboh Power Plant by PT

Supreme Energy Muara Laboh

Table VI-2 Environmental Monitoring Plan Matrix of 748

Geothermal Development Activities for

250 MW Muara Laboh Geothermal Power

Plant by PT Supreme Energy Muara Laboh

116

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

117

LIST OF FIGURES

Figure I-1 Location of PLTP and Electricity 130

Transmission Network System of PLN

Figure II-1 Flow Chart of Geothermal Power Plant 165

with Dual Flash Steam Cycle System

Figure II-2 Layout of Muara Laboh Geothermal Power 169

Plant

Figure II-3 Diagram of Switchyard of Muara Laboh 170

Geothermal Power Plant

Figure II-4 2-Phase Fluid Pipelines Network System 174

Figure II-5 Flow Chart of WTP dan Water Mass Balance 185

Figure II-6 Waste Water Treatment Diagram 187

Figure II-7 Management of the Potential Landslide by 192

using Technology

Figure II-8 Nursery 195

Figure II-9 CSR Activities performed by SEML 198

Figure III-1 Average Rainfall and Number of Annual 209

Rain Days in the Study Area

Figure III-2 Average Annual Windrose 210

Figure III-3 Lithological Cross-Section 220

Figure III-4 Indonesian Seismic Zone 225

Figure III-5 Erosion Hazard Levels 234

Figure III-6 Respondents’ Opinion on the Occurrence 310 of Social Conflicts

PT Supreme Energy Muara Laboh 118 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

R Figure III-7 espondents’ Opinion on Social Conflict 311 Resolution in Study Area

Figure III-8 Perception on Environmental Issues 329

Related to Additional Productions Wells

(Wellpads) for PLTP Muara Laboh

Figure III-9 Environment-Based Disease Occurrence in 335

Study Area

Figure III-10 Access to Public Health Services 336

Figure III-11 Percentage of Community Clean Water 339

around Project Site

Figure III-12 Percentage of Community Toilet 340

Facilities In the Study Area

Figure III-13 Percentage of Community Waste Water 341

Disposal

Figure III-14 Percentage of Community Waste Disposal 342

in the Study Area

Figure III-15 Percentage Community Healthy House 343

According to the study area

Figure III-16 Percentage Ratio of Vehicles Passing 353

Study Location

Figure IV-1 Gas Emission during Production Well 370

Testing

Figure IV-2 Schematic Diagram of NCG Removal System 373

in Geothermal Power Plant

Figure IV-3 Flowchart of Hypothetical Significant 379

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Impacts During Preconstruction and

Construction Stages

Figure IV-4 Flowchart of Hypothetical Significant 380

Impacts During Operation and Post-

operation Stages

Figure V-1 Flow Chart of Well Production Test 407

Figure V-2 Release of Steam to the Atmosphere 409

through Rock Muffler

Figure V-3 Pattern of Ambient H2S Gas Dispersion 415

During Production Test

Figure V-4 Pattern of Noise Propagation during 422

Drilling and Production Test

Figure V-5 Diagram of Simplified PLTP Flow Process 460

Figure V-6 Simplified Process Flow Chart of PLTP 462

(Geothermal Power Plant)

Figure V-7 Schematic Drawing of Cooling Tower with 463

4 Fans

Figure V-8 Correlation between Water Make-up and 466

H2S Gas Emission

Figure V-9 Dispersion Pattern of H2S Gas from 471

Cooling Tower

Figure V-10 Position of Cooling Tower and Plant 473

Layout of PLTP

Figure V-11 Pattern of Propagation of Noise 483

from PLTP Equipment

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Figure V-12 Flow Chart of Significant Impact of 536

Geothermal Exploitation Activities

for Muara Laboh 250 MW PLTP in the

Pre -Construction and Construction

Figure V-13 Flow Chart of Significant Impact of 537

Geothermal Exploitation Activities for

Muara Laboh 250 MW PLTP in the

Operation and Post Operation Stage

121

LIST OF MAPS

Map II-1 Planned Location of Geothermal Development 147

Activities for 250 MW Muara laboh

Geothermal Power Plant

Map II-2 Pattern of Utilization of Regional Spatial 148

Layout Plan in Solok Selatan District

Map II-3 Land Use Management at the Project Site of 149

Muara Laboh Geothermal Power Plant

Map II-4 Location of Project Site of 250 MW Muara 154

Laboh Geothermal Power Plant

Map III-1 Topography in the Proximity of Activity 221

Location

Map III-2 Geological Site of PLTP Muara Laboh (Muara 222

Laboh Geothermal Power Plant)

Map III-3 Soil Movement Vulnerability in Solok 226

Selatan District

Seismic Notes from 2004 2013 Map III-4 – 227 Map III-5 Hydrogeology of Solok Selatan District 230

Map III-6 PLTP Muara Laboh Project Site Hydrology 236

Map III-7 Locations for Sampling of Environmental 355

Components

Map IV-1 Study Area Boundaries 389

Map VI-1 Locations for Environmental Management and 789

Monitoring during Pre-Construction Stage

PT Supreme Energy Muara Laboh 122 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Map VI-2 Locations for Environmental Management and 780

Monitoring during Construction Stage

Map VI-3 Locations for Environmental Management and 783

Monitoring during Operation Stage

123

LIST OF TERMS/ABBREVIATION1

AMDAL Analisa Mengenai Dampak Lingkungan

(Environmental Impact Assessment)

ANDAL Analisa Dampak Lingkungan (Environmental

Impact Analysis)

API American Petroleum Institute

B3 Bahan Berbahaya dan Beracun (Hazardous and

Toxic Wastes)

BBM Fuel Oil

BCC Binary Combined Cycle

BOP Blow Out Preventer

BPN Badan Pertanahan Nasional (National Land

Affairs Agency)

CITES Convention on International Trade in

Endangered Species of Wild Fauna and Flora

DAS Daerah Aliran Sungai (Watershed or

catchment)

FGD Focus Group Discussions

GOR Gelanggang Olah Raga (Stadium)

HGU Hak Guna Usaha (Right to Cultivate)

HL Hutan Lindung (Protected Forest)

HPT Hutan Produksi Terbatas (Limited Production

Forest)

1 Translator’s Note: This part is the translation of the Indonesian source text only. Many abbreviations are not used in this translation.

PT Supreme Energy Muara Laboh 124 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

IPA Indeks Pencemaran Air (Water Pollution

Index)

IUCN International Union for Conservation of

Nature

IUP Izin Usaha Panas Bumi (Geothermal Mining

Business License)

Jorong Jorong [= small village]

KA ANDAL Terms of Reference of ANDAL (Environmental

Impact Analysis)

KAN Kerapatan Adat Nagari (Customary Land

Institution)

KK Kepala Keluarga (Family)

LH Lingkungan Hidup (the Environment)

LHR Lalu Lintas Harian Rata-rata (Daily Average

Traffic)

LPM Lembaga Pemberdayaan Masyarakat (Institute

for Community Empowerment)

MDL Methods Detection Limit

MCK Mandi Cuci Kakus (Public Sanitation, Bathing

and Washing Place)

MEQ Micro Earth Quake

MKJI Manual Kapasitas Jalan Indonesia (Indonesian

Highway Capacity Manual)

MW Megawatt

Nagari Nagari

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

ORC Organic Rankine Cycle

PERDA Peraturan Daerah (Regional Regulation)

PLN Perusahaan Listrik Negara (State Electricity

Company)

PLTM Pembangkit Listrik Tenaga Mikrohidro (Micro

Hydroelectric Power Plant)

PLTP Pembangkit Listrik Tenaga Panas Bumi

(Geothermal Power Plant)

PP Peraturan Pemerintah (Government Regulation)

PT SEML PT Supreme Energy Muara Laboh

Pole Vegetation with trunk diameter ranges from 5

to 10 cm

Tree Vegetation with trunk diameter is >10 cm

RSUD Rumah Sakit Umum Daerah (Regional :Public

Hospital)

RTRW Rencana Tata Ruang Wilayah (Spatial Zoning

Plan)

RUPTL Rencana Umum Penyediaan Tenaga Listrik

(General Plan for Provision of Electricity)

RKL Rencana Pengelolaan Lingkungan

(Environmental Management Plan)

RPL Rencana Pemantauan Lingkungan (Environmental

Monitoring Plan)

MSDS Material Safety Data Sheet

Sapling Vegetation with trunk diameter < 5 cm and

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

height > 1.5 m

Seedling Young tree with the height up to 1.5 meters

SIPA Surat Izin Pengambilan Air (Water Use

Permit)

SMP Satuan Mobil Penumpang (Passenger Car

Equivalent Unit)

TBE Tingkat Bahaya Erosi (Erosion Hazard Level)

TNKS Taman Nasional Kerinci Seblat (Kerinci

Seblat National Park)

TSS Total Suspended Solids

TDS Total Dissolved Solids

TPS Temporary Disposal Station

UKL Usaha Pengelolaan Lingkungan (Environmental

Management Effort)

UPL Usaha Pemantauan Lingkungan (Environmental

Monitoring Effort)

UU Undang-Undang (Law or Act)

WKP Wilayah Kerja Pertambangan (Mining Working

Area)

127

CHAPTER I INTRODUCTION

1.1 BACKGROUND

Muara Laboh Geothermal Prospect is located in West Sumatra, along the Sumatra’s fault system around 100 km south east of Padang City. Basically, the development of geothermal activity consists of two main systems, the surface system and subsurface system. The subsurface system is associated with geothermal reservoir itself, which will then supply steam to the surface system. The surface system extends from the production wellhead to the turbine house and ends at the condensate injection wells, until it produces electricity at the switchyard which is the point of connection to the high voltage transmission network of PLN.

The Geothermal Power Plant (PLTP) will convert the steam into electricity. Afterwards, the electric power generated from the geothermal power plant is distributed from a switchyard through the high-voltage transmission network system to the PLN substation. According to the agreement between PT Supreme Energy Muara Laboh (SEML) and PLN as set out in the PPA (Power Purchase Agreement), SEML is required to build a geothermal power plant in order to be able to supply 150 kV high voltage electricity to PLN in a minimum amount of 50 MW. Further, PLN is responsible for connecting electricity from the switchyard of the PLTP and distribute

PT Supreme Energy Muara Laboh 128 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

the same through a system of high-voltage transmission network to the substation at Sungai Rumbai which is 80 km from the PLTP. The locations of the PLTP and the high- voltage transmission network system of PLN West Sumatra

Region from the PLTP to the SungaiRumbai Substation is shown in Figure Figure 0-1.

Figure 0-1 Location of PLTP and Electricity Transmission

Network System of PLN

Based on the results of the baseline study of SEML, the geothermal field of Muara Laboh has geothermal reserve prospect of 300 MW. Therefore SEML intends to develop the geothermal project in Muara Laboh to generate 250 MW of electricity. Based on the results of further exploration, it turned out that several locations of well pads have no 129

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

prospects to be developed as production wells. Among the five (5) Wellpads namely ML-A, ML-B, ML-C, ML-E and ML-H, only Wellpads ML-A and ML-H have the potential to be developed as production wells namely ML-A1, ML-ML-H1 and

ML-H2 Wells. Results of the analysis of exploration wells on the phase-1 shows that Muara Laboh geothermal is only suitable for the development of geothermal power plant

(PLTP) with the capacity of 70 MW, if no new reserves are found at that location.

Therefore, SEML intends to develop a geothermal project in

Muara Laboh which can be divided into four (4) main groups of activities, namely:

1) The planned activities for the addition of 7 (seven) new

wellpads to generate steam.

2) The planned construction of two (2) pipeline systems

namely the 2-phase fluid pipeline network and 1-phase

fluid pipeline network, which are equipped with road

facilities for inspection and at the same time for

pieline maintenance.

3) The planned development of Geothermal Power Plant (PLTP)

in a new location by using Dual Flash Steam Cycle

technology.

4) The planned construction of the supporting facility for

the development of geothermal field, such as domestic

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

water supply and treatment, storm water treatment, waste

water treatment, chemical storage, workshops,

firefighting system and emergency power.

Based on the directives of Environmental Service Office of

Solok Selatan Distrit concerning the Clarification of

Changes in the Environmental Permit of SEML, pursuant to letter number 660/303 / XI / 2014, the preparation of

Addendum to Environmental Impact Analysis (ANDAL) and RKL-

RPL has been recommended.

In relation to such development plan, it is necessary for

SEML to prepare an Addendum to Environmental Impact

Analysis (ANDAL) and RKL RPL documents which specifically examine the impact of the proposed Geothermal Development

Activities of SEML. The Addendum to Environmental Impact

Analysis (ANDAL) and RKL-RPL documents is prepared with the aim of complementing the previoius studies which were not listed in the previous Environmental Impcat Analysis

(ANDAL) and RKL-RPL documents of SEML for the year 2013.

The result of evaluation of Addendum to Environmental

Impact Analysis (ANDAL) and RKL RPL will serve as input for the feasibility or non-feasibility of environment for the

Geothermal Exploitation activity of SEML. Studies in the

Addendum to Environmental Impact Analysis (ANDAL) and RKL-

RPL document only include the changes as referred to above.

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

Documents of Addendum to Environmental Impcat Analysis

(ANDAL) and RKL RPL is prepared with reference to the

ENVIRONMENTAL IMPACT ASSESSMENT (AMDAL) (Environmental

Impact Analysis, RKL and RPL) documents of the Planned

Geothermal Development Activities For 250 MW Muara Laboh

Geothermal Power Plant (PLTP Muara Laboh 250 MW) in Solok

Selatan District, West Sumatra Province by PT Supreme

Energy Muara Laboh which will be performed by virtue of the

Environmental Permits issued by the Regent of South Solok under Decree Number: 660.324-2013 on the Environmental

Permit for the Proposed Geothermal Development Activities for 250 MW Mara Laboh Geothermal Power Plant (PLTP Muara

Laboh 250 MW) in Solok Selatan District, West Sumatra

Province by PT Supreme Energy Muara Laboh into a single inseparable unit of study. Furthermore, the Environmental

Impact Analysis (ANDAL), RKL and RPL documents and the

Addendum to Environmental Impact Analysis (ANDAL) and RKL

RPL documents shall serve as the guidelines for the management and monitoring of the environment for Geothermal

Development Activities by SEML.

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

1.2 PURPOSE AND OBJECTIVE OF THE PREPARATION OF ADDENDUM TO ENVIRONMENTAL IMPACT ANALYSIS AND RKL-RPL

1.2.1 Objective of the Study

The objectives of the study of the Preparation of Addendum to Environmental Impact Analysis and RKL- RPL are as follows:

 To accommodate the addition of wellpads, the new

location of the PLTP and supporting infrastructure that

are not previously listed in the ENVIRONMENTAL IMPACT

ASSESSMENT documents and examine the impact caused by

this change, and to propose the environmental management

and monitoring plans;

 To comply with all laws and regulations in force in

conjunction with pollution control, waste management,

and monitoring of environmental quality;

 To ensure that the SEML activities have complied with

the provisions of sustainable environmentally-oriented

management of natural resources to allow natural

resources to be best exploited for the interest of

national economic development in general, and the

economic and social development in Solok Selatan

District in particular;

 To manage the environmental changes caused by mining

activities of SEML in order to properly maintain the

quality of the environment; 133

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

 To take precautions, prevention and control over the

adverse impacts and maximize positive impacts arising

from the Geothermal Development Activities for 250 MW

Muara Laboh Geothermal Power Plant (PLTP Muara Laboh 250

MW);

 To involve relevant agencies and authorities in dealing

with environmental management in the region;

 To ensure that SEML is fully responsible for providing

sufficient funds to implement the RKL and RPL in order

to continuously preserve the environmental conditions.

1.2.2 Purpose of Study

The purpose of the study of the Preparation of Addendum to

Environmental Impact Analysis and RKL- RPL are as follows:

 As guidelines and reference in the implementation of

environmental management in the area around the activity

locations;

 To assist local governments in decision making and

planning related to environmental management;

 To assist local governments within the function of

monitoring and evaluation of environmental supervision

in environmental conservation efforts;

 As a guideline and reference in the event of environment

related conflicts between the society and SEML;

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk PLTP Muara Laboh 250 MW

 To avoid any environmental damage and further improve

the positive impacts on the surrounding people and local

government.

135

CHAPTER II ACTIVITY PLAN

2.1 IDENTITY OF THE ACTIVITY PROPONENT AND PREPARER OF ADDENDUM TO ENVIRONMENTAL IMPACT ANALYSIS AND ENVIRONMENTAL MANAGEMENT PLAN AND ENVIRONMENTAL MONITORING PLAN

2.1.1 Identity of the Activity Proponent

Name of : PT Supreme Energy Muara Laboh (SEML)

Proponent

Office Address : Equity Tower, 18th Floor,

Sudirman Central Business District

(SCBD) Lot. 9,

Jalan Jenderal. Sudirman Kav. 52-53

Jakarta 12190, INDONESIA

Telephone : (021) 5155222

Number

Facsimile : (021) 5155333

Number

Activity : Geothermal Development for 250 MW

Muara Laboh Geothermal Power Plan in

Solok Selatan District, West Sumatera

Province

2.1. 2 Identity Of The Person In-Charge Of The Activity

Person in : Priyandaru Effendi

Charge

PT Supreme Energy Muara Laboh 136 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Position : VP Relations & SHE

Office Address : Equity Tower, 18th Floor,

Sudirman Central Business District

(SCBD) Lot. 9,

Jalan Jenderal. Sudirman Kav. 52-53

Jakarta 12190, INDONESIA

Telephone : (021) 5155 222

Number

Facsimile : (021) 5155 333

Number

2.1.3 Identity of Preparer of Adendum to Environmental Impact Analysis and RKL-RPL

Executing : PT ENV Indonesia

Agency

Competence : 0014/LPJ/AMDAL-1/LRK/KLH, valid until

Registration October 20, 2016

Office Address : Intiland Tower, 18th Floor

Jl. Jend. Sudirman Kav. 32, Jakarta

10220

Telephone : (021) 5790 1344

Number

137

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Facsimile : (021) 5790 1348

Number

Person in : Arief Pranata, S.Si

Charge

Position : Director

Whereas the Preparation Team of the Environmental Impact

Assessment is shown on Table 0-1.

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Table 0-1 Composition of Experts for the Preparation of

Adendum to ANDAL dan RKL-RPL

Competence No Name Position Competence Registration

A.AMDAL Preparation Team:

1. Rafeldy Team  Biologist K.038.07.11.0

Noviar, Leader 9.000233  AMDAL A S.Si Certificate

 Certificate for

the Head of

AMDAL

Preparation Team

(KTPA)

139

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Competence No Name Position Competence Registration

2. Ir. Member  Water Quality K.107.09.011.

Heryansyah Expert 000009

Zaini  AMDAL Preparer

Certificate

 Certificate for

the Head of

AMDAL

Preparation Team

(KTPA)

3. Arief Member  Environmentalist K.018.08.10.0

Pranata, 31.000243  AMDAL Preparer S.Si Certificate

 Certificate for

the Head of

AMDAL

Preparation Tem

(KTPA)

3. Dian Fiana, Member  Socio Economic A.018.08.10.0

SPi Expert 9. 000232

 Certificate for

the Head of

140

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Competence No Name Position Competence Registration

AMDAL

Preparation Tem

(KTPA)

4. Muchsin Member  Public Health A.049.04.12.0

Riviwanto, Expert 11.000559

SKM. M.Si  Certificate for

the Head of

AMDAL

Preparation Tem

(KTPA)

B. Expert Staff

1. Ir. Sugita Member  Air Quality and

Process Expert

 AMDAL A

Certificate

2. Ir. Ricky Member  Soil Expert

Sulistyo  AMDAL A and B

Certificate

3. Drs. Member  Chemist

Bustanul  AMDAL A and C Arifin, MSi Certificate

141

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Competence No Name Position Competence Registration

4. Dr. Member  Biologist

Chairul, MS  AMDAL-A Course

Certificate

5. Emilia Member  Environmental

Yompa, ST Engineering

Expert

6. Drs. Member  Socio Economic

Yusrizal Expert

Yulius,

M.A.

7. Irdam Huri, Member  Socio Cultural

S.Sos. MSi Expert

 AMDAL-A Course

Certificate

III. Sources

1. Dr. Ir.  Geological and

Witoro Environmental

Soelarno Expert

 AMDAL A and C

Course

Certificate

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Curriculum Vitae and Copy of Diplomas and AMDAL Training

Certificates of the experts involded are shown in

Attachment 12 to these ANDAL and RKL-RPL documents.

2.2 BUSINESS AND/OR ACTIVITY LOCATION

Geothermal Working Area (WKP) Liki Pinangawan Muaralaboh is situated at an altitude of 450-1500 meters above sea level

(asl) with an area of approximately 62,300 hectares (ha) as set out in the Geothermal Mining Business License (IUP) and is adjacent to the Kerinci National Park on the western part and the southern part.

In general, Liki Pinangawan Muaralaboh Geothermal Working

Area (WKP) consists of Limited Production Forest (HPT),

Protected Forest (HL) and Area for Other Purpose (APL).

Meanwhile, the site plan for the geothermal development project for 250 MW Muara Laboh Geothermal Power Plant is located in an area of 160 km2, which is entirely located on the Land Area for Other Purpose (APL). The land at the planned activity location is an area which was formerly used for tea, coffee and quinine plantations of PT Pekonina and community land (residential and agricultural cultivation).

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Based on identification by the Forestry and Plantation

Service Office and the TNKS Technical Implementation Unit, the status of the land in the area of Liki Pinangawan Muara

Laboh Geothermal WKP (Mining Business License) are outside the forest and TNKS areas (Attachments 4 and 5).

Administratively, Geothermal Developement Activities for

250 MW Muara Laboh Geothermal Power Plant is located in

Pauh Duo Sub-district and Sangir Sub-district which are located in Solok Selatan District, West Sumatra Province.

Map of the planned location of the Geothermal Development

Activities for 250 MW Muara Laboh Geothermal Power Plant is shown on

Map 0-1.

2.3 SUITABILITY OF ACTIVITY LOCATION WITH SPATIAL LAYOUT

Regional development in Solok Selatan District is zoned into three development areas according to the respective characteristics and potential of the region, which consist of among others:

 Sangir Sub-district which is centralized in Padang Aro

as the 1st (first) development center with growth points

comprising government services, public services and

trade.

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

 Sungai Pagu, Pauh Duo and Koto Parik Gadang Diateh Sub-

Districts as the centerof the 2nd (second) development

which is centralized in Muara Labuh with the growth

point comprising education, health, trade, tourism and

food crop production and geothermal.

 Sangir Batang Hari, Sangir Jujuan and Sangir Balai

Janggo Sub-Districts as the 3rd (third) development

center designated as an agropolitan area with the growth

point comprising plantation sectors.

According to the National Land Agency (BPN), the location of the project site has a former status as the Right to

Cultivate (HGU) land controlled by the government.

Implementation and control of the development program of

Solok Selatan District shall refer to Regional Regulation

(Perda) No. 8 of 2012 concerning Spatial Layout Plan (RTRW) of Solok Selatan District. The planned activities for the development of geothermal resources in Muara Labuh, Solok

Selatan are in compliance with the Regional Regulation by the inclusion of geothermal plan in the document and map of spatial layout development plan in this district. At the time of preparing the AMDAL document, SEML have obtained a certificate from Regional Development Planning Agency

(Bappeda) of Solok Selatan District on Suitability of RTRW of Solok Selatan with the planned activity locations of

145

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

SEML (Attachment 6). The map of patterns of utilization of the Spatial Layout Plan (RTRW) of Solok Selatan District and land use maps which are overlaid with planned

146

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

activities of SEML are shown on

147

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Map 0-2 and

Map 0-3. 148

Map 0-1 Planned Location of Geothermal Development Activities for 250 MW Muara laboh Geothermal Power Plant

PT Supreme Energy Muara Laboh 149 Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

Map 0-2 Pattern of Utilization of Regional Spatial Layout Plan in Solok Selatan District

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Map 0-3 Land Use Management at the Project Site of Muara Laboh Geothermal Power Plant

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2.4 HISTORY OF DEVELOPMENT AND ACTIVITIES IN PROGRESS

Geothermal prospects in Liki Pinangawan Muaralaboh

Geothermal WKP is located in West Sumatra province, along the Sumatra fault system of about 130km southeast of

Padang, precisely in the area of Pauh Duo and Sangir Sub-

Districts, Solok Selatan. District. Two geothermal resources in Geothermal WKP Liki Pinangawan Muara Laboh stretch along 50 km on the Sumatra fault zone, from Muara

Labuh Utara to Muara Labuh Selatan. Both geothermal sources have different geothermal resources and recharge areas, although hydrologically both are connected to each other.

Most of the hot springs connected to Muara Labuh are located in a Suliti River Valley, the basin tectonics

(tectonic basin) along 30 km and 2-3 km in width at an altitude of 450 meters above sea level. The tectonic basins in Muara Labuh Utara. From the south end of the basin, the topography continues to ascend, the hot springs are found at a distance of + 3 km from Bukit Sikapa (656m) towards

Sapan Malulong (850m). The area to the south of Bukit

Sikapa is called Muara Labuh Selatan. Activities of hot springs in the south indicate a high temperature geothermal systems, including fumaroles, boiling springs and steaming hot springs.

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Development of Geothermal Resources by SEML in Mining

Working Area (WKP) of Geothermal in Liki Pinangawan Muara

Laboh in Solok Selatan District, West Sumatra Province has been stipulated on March 30, 2009 by the Minister of Energy and Mineral Resources under letter No. 1086 K/30/MEM/2009 and in 2014 SEML made the second change to the WKP based on

Decree of Ministry of Energy and Mineral Resources No. 4112

K/30/MEM/201 issued on November 24, 2014. (Attachment 7).

SEML already has a Geothermal Mining Business Permit (IUP) which was issued under Decree of the Head of Solok Selatan

District No. 540/02 / DESDM / Bup-2010 dated 26 April 2010, and its amendment by virtue of Decree of Head of Solok

Selatan District Number: 540-94-2013 dated April 22, 2013

(Attachment 8).

The Company is currently planning to conduct geothermal development activities (exploitation and production) in the

Geothermal WKP in Liki Pinangawan Muaralaboh that can be used as a power source, so that AMDAL document is required.

In 2010, SEML began to carry out exploration activities including Micro Earth Quake (MEQ) surveys, topographic surveys, infrastructure construction/civil works and land clearing for the exploration activities. Drilling construction at the exploration stage began after the Power

Purchase Agreement with the State Electricity Company (PLN) 153

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

was signed. The first exploration well drilling was conducted in September 2012. The exploration activities aim to look for potential geothermal energy which is adequate to build a power plant of 250 MW. This plant will receive a supply of steam through a steam pipeline flow originating from 13 (thirteen) wellpads or more with the total number of 24-27production wells approximately.

Pursuant to Presidential Decree No. 4 of 2010 in conjunction with Presidential Regulation No. 48 of 2011, activities of Geothermal Power Plant (PLTP) in Muara Labuh which is developed by SEML is a national project and included in Phase II of Accelerated 10.000 MW Power Plant

Development Program.

SEML is a company owned by PT Supreme Energy, GDF Suez (a company domiciled in France) and Sumitomo Corporation (a company domiciled in Japan). SEML was established in 2008 and is the developer of the first geothermal power which has conducted exploration activities among other holders of

Geothermal Mining Business License (IUP) for Phase II, after the issuance of Law No. 27 of 2003 on Geothermal.

Based on the results of the study of SEML, geothermal fields in Muara Laboh have prospective geothermal reserves of 300 MW. Muara Laboh geothermal field is able to produce wet steam (2 phases) having enthalpy which varies from a 154

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

low enthalpy of 1025 kJ/kg to a high enthalpy of 2000 kJ / kg. In accordance with the reserve potential and characteristics of geothermal steam, SEML originally intended to build a geothermal power plant (PLTP) with a capacity of 250 MW using a Single and Dual Fash Steam Cycle technology.

SEML estimates that the Geothermal Development Project in

Muara Laboh is capable of generating 250 MW of electricity with Single and Dual Fash Steam Cycle technology. Various facilities have been constructed at the project site, such as the base camp, laydown area, access road to the project, wellpad and other project facilities. Even the land acquisition of about 125 hectares have been performed and almost completed. Exploration drilling has also been conducted in 5 (five) wellpads. However, based on the results of the exploration drilling some wellpad locations do not have the prospects to be developed into a production well. Out of 6 (six) exploration wells which have been drilled in 5 (five) wellpads, namely ML-A, ML-B, ML-C, ML-E and ML-H, the wells which have the potential to be developed into production wells site are only the wells located in Wellpad ML-A and ML-H, namely ML-A1, ML-H1 and

ML-H2. The exploration well drilling activities that have been performed by SEML in various wellpads gave the following results: 155

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Table 0-2 Result of Exploration Well Driling

Result of Well location Follow up exploration

ML-A1 Successful HP Production

well

ML-H1 Marginal LP Production

well

ML-H2 Marginal Injection well

ML-B1 Fail Injection well

ML-E1 Fail Injection well

ML-C1 Fail Monitoring well

Remarks: - HP = High pressure - LP = Low pressure

Based on the exploration results only ML-A1 well produces

HP steam and ML-H1 well produces LP steam that can be further developed into production wells. Other wells are classified as failed production wells, thus it will be used as brine injection and condensate wells. Brine is a liquid from the reservoir which are carried by the steam rising to the ground surface, while the condensate fluid is steam that condenses in the condenser of a Geothermal Power

Plant. Both fluids are classified as wastewater with high

TDS levels that must be returned to the reservoir through injection wells.

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The planned activities that have been performed up to this stage are as follows:

1) The land clearing activities for the project and access

road to the project site, having a total area of 125

hectares.

2) Labor recruitment for the project, both skilled and

general labor.

3) Civil works to carry out the construction of the access

road to the project site, access road to the wellpad

site, construction of Wellpads ML-A, ML-B, ML-C, ML-D,

ML-E, and ML-H, the construction of base camp, laydown

areas and other supporting facilities.

4) The transportation of construction materials and

drilling equipment from outside the project site to the

project site.

5) Drilling of exploration wells in Wellpad ML-A, ML-B, ML-

C, ML-E, and ML-H up to well production testing

activities.

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Map 0-4 Location of Project Site of 250 MW Muara Laboh Geothermal Power Plant

PT Supreme Energy Muara Laboh 158

2.5 ACTIVITIES THAT HAVE BEEN AND WILL BE UNDERTAKEN

Currently SEML is evaluating the feasibility of geothermal projects in Muara Laboh, in terms of technical, economic and environmental feasibilities. The results of the technical and economic feasibility of Muara Laboh project based on the Project’s Feasibility Study can be summarized as follows:

2.5.1 Wellpad Prospects

The 1st phase development relies on geothermal resources derived from Wellpad ML-A and ML-H, while Wellpad ML-I, ML-

J and other Wellpads will be used as a source of geothermal energy for the next development stage. Furthermore, Wellpad

ML-B, ML and ML-E-D will be used as injection wells.

As the basis for the calculation of optimization, the wellhead pressure is set at an average of 10 bar absolute.

1) ML-A production Wellpad

ML-A1 is the most productive wells which is capable of producing up to 25 MW of steam. The flow rate of steam from

ML-A1 is 7.25 t/h, which is equivalent to 2 kg/s. The reservoir of such wells consist of liquid having a temperature of 2350C, therefore Wellpad ML-A can still be developed further for production drilling. The plan for the

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future is to perform drilling at Wellpad ML-A in which each well drilled is expected to be able to generate steam which is equivalent to 10 MW. The Steam has an enthalpy of 1,200 kJ/kg based on empirical experience which is expected to increase to 2,000 kJ / kg in 10-15 years of operation. As the enthalpy increases, the brine content will become lower, hence reducing the formation of LP steam (low pressure geothermal steam).

2) ML-H Production Wellpad

At this time the ML and ML-H2 wells have low productivity.

ML-H1 well is capable of producing low pressure geothermal steam (LP steam), while ML-H2 wells can only be used as an injection well. Therefore, the drilling of new wells in

Wellpad ML-H which is expected to generate steam each well of 10 MW at an enthalphy which ranges between 1100 and 1200 kJ / kg must be done in the future. The enthalpy of the said wells will decline gradually, hence the brine levels will also gradually increase. Thus the production wells on

Wellpad ML-H is only useful as an additional supply of LP steam in the Geothermal Power Plant that uses the Dual

Flash Steam Cycle System technology.

2.5.2 Selection of Production Capacity of Geothermal Power Plant

At the beginning of evaluation, the geothermal field in

Muara Laboh can only be developed to produce 60 MW of

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electricity with Single Flash Steam Cycle technology. The consequences of that choice will result in a decrease in production within a few years of operation, thus an additional supply of 20 MW steam is needed. The Single

Flash technology is proven to be not the best option, so

SEML is trying to develop a geothermal power plant using the Dual Flash Steam Cycle technology. The Dual Flash Steam

Cycle Technology generates additional production of low pressure steam (LP steam) from the first HP Brine Flashing.

Based on the result of drilling evaluation and reservoir model numerical analysis, Muara Laboh geothermal field has a capacity of 70 MW when Dual Flash Steam Cycle is used.

Production of 70 MW consists of 60 MW generated from the high-pressure steam (HP steam) and 10 MW from low pressure steam or LP (flash) steam and additional LP steam from ML-

H1 wells. Thus the design of the geothermal steam collection system (SGS = Steam Gathering System) is based on a capacity of 70 MW. In other words, at phase 1, SEML intends to first build a geothermal power plant with a capacity of 70 MW using Dual Flash Steam Cycle System and will increase its capacity when addtitional geothermal sources can be generated.

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2.5.3 Planned Drilling Activity at Wellpad A dan H

In order to meet the production target of 70 MW with Dual

Flash Steam Cycle technology, it is necessary to drill additional wells at Wellpad ML-A and ML-H. The drilling plan will be carried out as follows:

1) Planned drilling of 4 (four) production wells at Wellpad

ML-A.

Wellpad ML-A is expected to generate high-pressure steam

(steam HPP) with a capacity of 10 MW on each well.

Therefore drilling of 3 (three) to 4 (four) production wells at Wellpad ML-A to produce steam equivalent to 30 MW is needed.

2) Planned Drilling of 3 (three) production wells at

Wellpad ML-H

Different from the wells at Wellpad ML-A which are capable of producing high-capacity HP steam, the wells at Wellpad

ML-H produce only low pressure steam (LP steam) with capacities ranging between 3-5 MW for each well. Therefore the drilling of three (3) new wells at Wellpad ML-H which is expected to generate 10 MW steam HP with enthalphy which ranges between 1100 and 1200 kJ / kg is necessary. Thus the production wells at Wellpad ML-H is only useful to supply a small portion HP and LP steams to Geothermal Power Plant that uses Dual Flash Steam Cycle System technology. 162

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

2.6 PLANNED ADDITIONAL ACTIVITIES

According to the results of project evaluation only Wellpad

MLA and ML-H are productive, so at phase 1 geothermal field of Muara Laboh can only be developed to a capacity of 70

MW. The project can run with some additional project facilities. Thus the scope of the proposed additional activities must be further studied in the Addendum to ANDAL and RKL-RPL as follows:

2.6.1 Planned Labor Recruitment

SEML will perform labor recruitment (recruitment) during construction and operation phase. Labor for construction shall include drilling and construction workers of the PLTP

(Geothermal Power Plant). For the preparation of the next start up of the PLTP, SEML will prepare manpower for the operation of SGS and the PLTP.

Labor requirements will be met according to the stage of development of SEML project in Muara Laboh, in which the number of labor required by the Company and their qualifications will certainly be fluctuated from time to time, depending on the types and scopes of the activities themselves.

Due to the nature of the work to be performed by SEML before the operation of a project, most of the work will be done by contractors in accordance with their respective 163

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

areas of competence, including the use of labor that will carry out the said works.

The Muara Laboh Geothermal Power Plant development activities will absorb the labor directly employed by SEML as well as those employed by contractors. The qualifications of the workforce will be tailored to the requirements, so that the projects implemented can be completed in timely manner and within the predetermined budget.

During the construction phase, it is expected that 2000 to

2500 people will be gradually employed, both as permanent and non-permanent workers with various fields of knowledge and skills. The labor to be recruited for this project, to the extent possible, is from local workforce having qualifications needed for the project of the Company. It is estimated that about 15% will come from the vicinity of the activity location.

Activities in this phase will include the improvement of connecting roads between wells, improvement of existing wellpads, drilling of production wells, injection wells, installation of wellpad equipment such as separators, accumulators, pipe production and injection pipes and the construction of Geothermal Power Plant.

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Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

2.6.2 Planned Addition of New Wellpads

In addition, SEML is also planning to add new wellpads for additional production wells in order to seek additional geothermal reserves.

There are 7 (seven) new wellpads planned to be added, all of which are located within the project boundary. The

Locations of the 7 new wellpads are shown in Table 0-3.

Table 0-3 Coordinates of Planned Additional New Wellpads

UTM Coordinates Wellpad Code Easting Northing

ML-F 736705 9819340

ML-I 736410 9819270

ML-J 736405 9819905

ML-06 737780 9819050

ML-07 738260 9818940

ML-08 737610 9821545

ML-09 736420 9823780

Source: SEML, 2014

2.6.3 Planned Earthwork

The planned earthworks shall include: road and pipelines, wellpad, basecamp, geothermal power plant, laydown areas construction works and so on. Based on the calculation, the

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amount of cut and fill material that would result from additional activities are as many as 375 100 m3

The detailed earthworks are presented in Table 0-4.

Table 0-4 Estimated Cut and Fill in Earthworks

Estimated in No. Activity Cubic (m3)

1. Road Construction 116.358

2. Wellpad 154.670

PLTP (Geothermal Power

3. Plant) and its 104.034

Facilities

Total 375,062

Rounding Up 375.100

Source: SEML, 2014

2.6.4 Planned Construction of 70 MW Geothermal Power Plant

SEML has opted to build a geothermal power plant with a capacity of 70 MW using Dual Flash Steam Cycle technology.

The choice made on the geothermal power plant capacity and technology is based on the following considerations:

 Potential sources of geothermal relies on wells at

Wellpad ML-A, which produces HP steam, while the wells

at Wellpad ML-H produces HP steam and LP steam in a

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small amount so it is only useful as an additional

supply of LP steam.

 HP steam from wells at Wellpad ML-A and small amount of

additional HP from wells at Wellpad ML-H is capable of

generating 60 MW, and LP steam flash plus additional

supply of LP steam from wells at Wellpad ML-H can

produce additional production of 10 MW, bringing the

total production of the Geothermal Power Plant to 70 MW

In the Power Plant, HP and LP steam enters the double-flow turbine to drive a 2-pole electric generator of 3,000 rpm

(50 Hz). The Flow Chart of a Geothermal Power Plant that uses Dual Flash Steam Cycle technology is presented in

Figure II-1.

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Figure 0-1 Flow Chart of Geothermal Power Plant with Dual

Flash Steam Cycle System

Wellhead pressure is estimated at 10 bars and HP steam separation operation will take place at a pressure of 9.1 bar and a pressure drop (pressure drop) of 0.4 bar so that

HP steam to the geothermal power plant is at a pressure of

8.7 bar. Furthermore, in order to prevent the formation of silica, the LP Separator operating pressure should not exceed 4 bar. Therefore the LP steam entering the turbine has a pressure of 3.8 bar. Thus, HP steam entering the turbine has an estimated pressure of 8.7 bar, while the LP 168

Adendum ANDAL dan RKL-RPL Kegiatan Pengusahaan Panas Bumi untuk GEOTHERMAL POWER PLANT Muara Laboh 250 MW

steam pressure is 3.8 bar. In summary the main parameters of the geothermal power plant are presented in Table 0-5.

Table 0-5 Main Parameters of Dual Flash Geothermal Power

Plant

Parameter Value Units

HP steam pressure entering 8,7 Bar the turbine

LP steam pressure entering 3,8 Bar the turbine

Flow rate of HP steam 120 kg/s

Flow rate of LP steam 24,5 kg/s

Condenser Pressure 0,1 bara

Power Generator Outcome 70 MW

Electrical Load for 3,3 MW operation

Net power generated by 66,7 MW GEOTHERMAL POWER PLANT

kg/s/MW Steam rate of HP 2,0 gross

kg/s/MW Steam rate of LP 2,45 gross

Source: SEML, 2014

Some of warm condensate from the condenser flows into the injection wells, while the remaining is further cooled, and 169

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after it is cold it is used to cool the Condenser. Wet bulb temperature has an average of 19,70C which allows mechanical induced draft cooling to be used for cooling the condensate of Geothermal. The fluid flow is done with counter-current, meaning warm condensate is sprayed from the top of Cooling Tower, while cold air flows from the bottom towards the top so that there are contacts between warm condensate and cold air. As the result, condensate is cooled and reused as a condenser coolant, while the warm air flows out of the Cooling Tower.

Plant layout of the Geothermal Power Plant and the position of the cooling tower are presented in Error! Reference ource not found..

2.6.5 Planned Construction of Switchyard and Electricity Connection to PLN Transmission Grid.

At Phase 1 SEML intends to develop Muara Laboh geothermal field to generate electric power of 70 MW at a voltage of

150 kV at switchyard position. The switchyard is the end point of connection to the transmission network of PLN based on the agreement set forth in PPA (Power Purchase

Agreement). Then from this switchyard, PLN will connect and supply power through the 150 kV transmission network to PLN

Substation at Sungai Rumbai. The Switchyard diagram is presented in

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Figure 0-3.

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Figure 0-2 Layout of Muara Laboh Geothermal Power Plant

PT Supreme Energy Muara Laboh 172

Figure 0-3 Diagram of Switchyard of Muara Laboh Geothermal Power Plant

PT Supreme Energy Muara Laboh 173 Addendum to ANDAL and RKL-RPL of Geothermal Development Activities for 250 MW Muara Laboh GEOTHERMAL POWER PLANT

2.6.6 Planned Construction of Steam Gathering System

The Steam Gathering System or SGS generally consists of pipelines from wellpads and separators toward the Geothermal

Power Plant. 2-Phase steam originating from each production well is separated in the separator to form dry steam and the remaining will be in the form of liquid brine. Then dry steam produced is sent through the production pipeline to the geothermal power plant, while the brine is returned to the reservoir through injection wells.

1) Pipelines system for 2-phase fluids from the wellpad

Based on the exploration results, SEML has determined 2 (two) wellpads which are potentially to become the source of steam for production, namely Wellpad ML-A and Wellpad ML-H. The current capacity and planned increase in production capacity of the two wellpads are as follows: a) Wellpad ML-A

Currently there is 1 (one) well at Wellpad ML-A namely the ML-

A1 well and SEML plans to drill another three (3) to four (4) production wells. Wells from Wellpad ML-A is expected to generate steam in the amount as described below:

- The existing well, namely ML-A1 has 25 MW HP steam

production capacity, with 2-phase steam flow rate of 140

kg/s with the enthalpy approximately 1.500 kJ/kg.

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- The addition of 3 (three) new wells ML-Ax with HP steam

production capacity of the wells is 30 MW. 2-Phase steam

flow rate is 93 kg/s at the wellhead pressure of 10 bara

and the enthalpy ranges between 1.200 and 2.000 kJ/kg.

The diameter (DN) of 2-phase fluid pipe for each high pressure pipeline is as follows:

- Branch pipeline ML-A1 and ML-Ax – DN 450 or DN 500.

- HP two phase header – DN 1050.

b) Wellpad ML-H

The second prospect is Wellpad ML-H which is located at the height of 1.140 m asl. Currently in Wellpad ML-H area there is one (1) production well, namely ML-H1 and approximately another three (3) new wells are planned to be added. Thus,

Wellpad ML-H capacity is as follows:

- The current well, namely ML-H1 LP has a steam production

capacity of 5 MW. The 2-phase steam flow rate of 70 kg/s

with enthalpy ranging between 970-1040 kJ/kg.

- Additional three (3) new ML-Hx wells have HP steam

production capacity of 10 MW. The 2-phase steam flow rate of

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each well is 118 kg/s at a pressure of 10 bars with enthalpy

ranging between 1100 and 1200 kJ / kg.

The diameter (DN) of two-phase fluid pipes for each low- pressure pipe is as follows:

- The Branch Pipe of ML-H1 dan ML-Hx wells- DN 450 (diameter

in = 450 mm).

- LP two phase header – DN 500.

- HP two phase cross country line – DN 750.

Therefore, all production wells of Wellpad ML-A and ML-H are capable of generating 65 MW HP steam and 5 MW LP steam.

Furthermore, after being separated in the separator 60 MP HP steam and 10 LP steam will be formed which will further be sent to a Geothermal Power Plant via the steam pipelines.

Geothermal steam gathering systems and 2-phase fluid pipelines are presented in Figure 0-4.

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Figure 0-4 2-Phase Fluid Pipelines Network System

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2) Steam and brine separation system in Separator

Each well at Wellpad ML-A and ML-H is equipped with a separator that functions to separate the steam and brine.

Ideally, this separator is capable of producing dry steam without brine. The Separator facility at each Wellpad are as follows: a) ML-A Separator Station (SS1)

SS1 consists of two (2) HP Separator units, each of which is able to deliver 30 MW HP steam and is equipped with one (1) unit LP Separator designed to be able to separate the

(flashing) HP brine to 8 MW LP steam and brine. Thus SS1 can serve the separation of 60 MW HP steam and 8 MW LP steam. HP brine is brine which actually still contains steam, so if discharged directly into the environment it would be a waste of natural resources. HP brine can still be obtained by the LP steam that can be used as an additional supply of LP steam to the turbine. b) ML-H Separator Station (SS2)

SS2 consists of one (1) LP Separator unit which functions to separate the brine and steam that is designed to be capable of sending 5 MW LP steam. With the additional three production wells, then the Wellpad ML-H requires one (1) additional unit

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of HP Separator with a capacity of 10 MW HP Steam. In addition to the separator, Wellpad ML-H is also equipped with a flash tank, pond drilling and thermal pond.

All brines from the LP Separator flow into the pond (pond) located at Wellpad ML-A, which then flow into the injection well. The size of each Separator is presented on Tabel 0-6.

Tabel 0-6 Size of HP Separator and LP Separator

30 MW HP 8 MW LP 5 MW LP

Description Separator in Separator in Separator in

SS1 area SS1 area SS2 area

Diameter (m) 2,7 2,6 1,75

Height 8,5 10,5 4,5

Inlet (DN) - 750 600 450 mm

Inlet type scrolled scrolled scrolled

Steam outlet - 900 750 500 mm

Brine outlet - 400 500 250 mm

Source: SEML, 2014

Upon the completion of drilling, the former drilling pond which will not be backfilled, will be used as thermal pond to

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temporarily accommodate brine during an emergency (EDV -

Emergency Dump Valve). Furthermore brine can be returned to the reservoir through injection wells.

3) Chemical properties of steam and brine fluids separated in

Separator

Based on the analysis of ML-A1, ML-H1, ML-H2 wells in, it is indicated that the brine coming from geothermal wells of Muara

Laboh has a low level of TDS. Scaling test was conducted on

ML-A1 wells and wells ML-H1. The conclusion is that the silica saturation will occur when steam is separated from brine at a temperature of 1440C or at a pressure of 4 bars. Therefore, in order to prevent the formation of silica then pressure in the separation operation of steam and brine should be less than 4 bars. The steam does not only contain brine but also gas ranging from 0.5 to 0.7% by weight so that according to the criteria of the size of the geothermal, the gas content is moderate. 2-phase fluid coming out from the well head are separated in the separator to form liquid in the form of brine and steam s. Chemical properties of the brine is presented in

Table 0-7.

Table 0-7 Chemical Properties of Brine Separated at Separator

Parameter Typical Low High Unit

pH 6,8 6,0 7,5 −

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Parameter Typical Low High Unit

Na 1184 947 1545 mg/kg

K 210 168 274 mg/kg

Ca 30 24 39 mg/kg

Cl 1961 1569 2559 mg/kg

SO4 39 31 51 mg/kg

B 68 54 89 mg/kg

SiO2 567 454 740 mg/kg

Total 4.059 3.247 5.297 mg/kg

Source: SEML, 2014

Boron is the main nutrient for plant growth, so its presence in soil and irrigation water is important in determining agricultural production. Boron plays an important role in shaping the structure of the cell wall, taking care of the plasma membrane and regulate metabolic pathways. The average needs of the plant is 0.2 mg/L and become toxic at levels of

1-2 mg / L, but not all the leaves of plants sensitive to boron, there are some which are even resistant to Boron up to the content of 250-300 mg/kg (dry weight). In nature the element Boron (B) is in the form of borax compounds

Na2B4O7.10H2O or Na2[B4O5(OH)4]·8H2O.

Ions of Na, K, Ca, Cl, SO4, SiO 2 and B is soluble in brine water and measured as TDS (Total Dissolved Solid). So the

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brine TDS levels of approximately 4059 mg/kg or less than 5000 mg/kg as the limit for the minimum TDS brackish water, so that the brine has relatively low levels of TDS. Nevertheless, the brine must not be discharged into the body of river water having a very low TDS level of less than 50 mg/kg. Therefore, it is absolute that the brine should be returned to the reservoir through injection wells, in addition, this is to prevent environmental pollution as well as to maintain the content of the geothermal reservoir.

Steam that is separated from the Separator which has the gas content that cannot condensate is called NCG (Non Condensable

Gas). NCG is dissolved in the steam so that it is always contained in the steam until the dry steam enters the turbine.

Furthermore, in the Condenser of GEOTHERMAL POWER PLANT, NCG is separated from the steam, then it is released into the atmosphere hence potentially producing H2S gas emission. NCG chemical properties contained in the steam are presented in

Table 0-8.

Table 0-8 Chemical Properties of NCG in Steam Separated at

Separator

Parameter Typical Low High Unit

CO2 4.740 2.370 14.220 mg/kg

H2S 118 59 354 mg/kg

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NH3 2,1 1,1 6,3 mg/kg

H2 1,2 0,6 3,6 mg/kg

CH4 1,8 0,9 5,4 mg/kg

N2 54 27 162 mg/kg

Source: SEML, 2014

Among the said NCGs, H2S gas is a gas that potentially creates emissions that have significant impact on the environment, while the other gases have less significant effects. Levels of ammonia gas (NH3) is relatively small so it does not impact on the environment. The CO2 is not a pollutant, but in a very large amount, it can have an impact on the global climate. The presence of CO2 in a geothermal project is relatively small so that they can be absorbed by forests around the project site that need photosynthesis for its plants.

2.6.7 Planned Construction of 1-Phase Fluid Pipelines

There are three (3) 1-phase fluid pipeline systems, namely steam pipelines, brine pipelines and condensate pipelines.

Steam pipelines channel the hot steam from the Separator to the geothermal power plant, and the brine pipelines channel the brine from the separator to the injection wells, while the condensate pipelines channel condensate water from Condenser of the geothermal power plant to the injection wells.

1) Steam Pipelines

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The high-pressure pipeline of 320 m long with a diameter of DN

1200 has the function to send 60 MW HP steam from the SS1 to the Geothermal Power Plant. Afterwards, the pipeline of 750 m long with diameter of DN 750 LP channels 8 MW steam from SS1 to the connection pipe of ML-H of 1,140 m with a diameter of

DN 600. The steam flow through the high pressured pipelines

(HP steam) may experience a pressure drop of 0.16 bars.

The low pressure pipeline channels 5 MW LP steam from Wellpad

ML-H which afterwards meet 8 MW steam from the LP Separator

SS1. The combined size of the pipeline is equivalent to 10 MW

LP steam. Steam flow through a low pressure pipeline (LP steam) may experience a pressure drop of 0.14 bars.

The entire pipeline is equipped with a CDP (Condensate Drain

Port) with an interval of 200 m in order to accommodate the condensate formed during the course of the flow of steam to the geothermal power plant. Thus there will be:

- 6 CDPs on LP steam pipelines from Wellpad ML-H to SS1.

- 2 or more CDPs on LP steam pipelines from SS1 to GEOTHERMAL

POWER PLANT.

- 2 or more CDPs at HP steam pipeline from SS1 to GEOTHERMAL

POWER PLANT.

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geothermal power plant through the channel created specifically along the pipeline.

2) Brine pipelines and injection wellpads

Brine from SS1 is sent to be injected into the well at Wellpad

ML-D through a pipeline of 2,320 m and to Wellpad ML-E through a pipeline of 3,840 m long. Wellpad ML-E elevation is 1,210 m above sea level and Wellpad ML-D is 1.090, so the difference in the elevation between SS1 and wellpad allows the flowing of brine by gravity. Wellpad ML-D functions as wellpad for main injection at a flow rate of 120 liters/sec, while the Wellpad

ML-E functions as a reserve injection wellpad .

Injection wells are designed with brine flow capacity of 375-

400 kg/s, although the normal operation of the brine flow rate is only 120-140 kg/s. The size of the brine pipes used are as follows:

- The pipeline from the wells at Wellpad ML-A to Wellpad ML-E

uses the pipe of DN 600 type.

- The pipeline from the wells at Wellpad ML-E to Wellpad ML-D

uses the pipe of DN 500 type.

- All branches of the injection pipelines use pipe of DN 300

type.

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In a normal operation, the brine from Wellpad ML-H are injected into ML-H2 wells, however, in emergencies, brine flow to SS1 which then flow into the injection wells along with brine from SS1 to the injection wells at Wellpad ML-D. In accordance with the project area topography, brine can flow into the injection wells by gravity

3) Condensate pipelines and wellpads for injection wells

The condensate from the Geothermal Power Plant Condenser flows into the wells at Wellpad ML-B, however, as a reserve or in an emergency situation, it can also flow to Wellpad ML-E with a flow rate of 140 liters/sec. Thus no condensate is discharged into the body of river water. The distance between the

Condenser of the geothermal power plant to Wellpad ML-B is approximately 1200 m. The condensate flow rate is estimated at

45 kg/sec so a condensate pipe type DN 250 is needed. The flowing of condensate into injection wells requires pumps that has a static pressure of 20 bars.

In general, the land in Muara Laboh has many boulders, thus there will be many obstructions in construction during the installation of piles for the pipeline. Therefore a special foundation design of the pipeline is required in accordance with the characteristics of rocky ground at the project site.

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The pipeline will generally be constructed according to existing road construction in order to facilitate the process of construction, maintenance and operation and examination at the time of production. The pipeline requires the slope requirement, certain security and safety measures hence the pipeline will require cut and fill works to align with slope requirements and the flowing by using gravity.

The pipelines consists of dry steam, wet steam, brine and condensate pipes. On the left or right side of the pipeline, drainage channels and inspection road parallel to the pipeline will also be built. In the pipeline, where there is no access road a crossing track will be constructed such as crossings with roads, rivers or other crossings.

The pipelines are designed to withstand high pressure and an earthquake of 7 SR. It is therefore less likely to leak due to the disaster. In addition, eachgeothermal well is equipped with a safety valve to prevent the spread bursts of steam in the event of a leak.

2.6.8 Planned Construction of Project Facilities

Muara Laboh Geothermal field development project is equipped with several project facilities. Several facilities to be constructed include domestic water supply and treatment, storm water treatment, waste water treatment plants, chemical

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storage, workshops, fire fighting system, emergency power and project administrative office facilities.

1) Domestic water supply and treatment

During the operation, the project requires process water and water for various purposes and potable water. Total raw water requirement of 130 m3/hr is taken from the Bangko Jernih

River, which will be further processed in the WTP (Water

Treatment Plant). The WTP consists of Settling Pond, Water

Basin, Clarifier, Sand & Carbon Filter and Water Storage.

River water flows into the Settling Pond to precipitate the rough mud, and then sent to the Water Basin as a reserve of raw water. Further the water is cleaned in the Clarifier with the aid of a chemical coagulant and flocculant. Periodically, sludge is blown down into the mud reservoir, while the clean water is reprocessed with the Sand Filter. The smell of gas dissolved in the water is absorbed in a Carbon Filter, and then injected with chlorine as a disinfectant in order to produce process water. Furthermore, the treated water is stored in a water storage tank, and then distributed to all units of water users. Flow chart of water treatment and water mass balance is presented in the following figure:

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Figure 0-5 Flow Chart of WTP dan Water Mass Balance

Water consumption for the production of drilling mud (mud) or drilling circulation is in an average of 8 m3/hour which will last for two (2) months for each drilling well. At any drilling, water collected in the Water Pond and Mud Pond in every wellpad up to 6,000 m3 volume. During the drilling process, the water is circulated at a rate of 30-60 liters/sec. Upon the completion of drilling, the remaining water and drilling mud flow into the injection wells.

2) Storm water treatment

This facility serves to channel and direct the rain water to prevent it from mixing with waste water. Storm water treatment consists of a rain water channel the ends of which are sustained by the Settling Pond. This rain water has no pollutant levels hence it can be released directly from the

Settling Pond into the body of water.

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Each fuel and chemical tanks are surrounded by bundwall to localize spills which will further flow through a special drainage towards the WWTP (Waste Water Treatment Plant).

3) Waste Water Treatment Plant (WWTP)

Waste water from the PLTP (Geothermal Power Plant) is originating from oil spills from the workshop and oil tank and spills with low content of chemical substances.

So the chemicals contained in the PLTP waste water are primarily consisting of hydrocarbon and TDS.

The WWTP is a simple unit consisting of Settling Pond, Oil

Trap and Holding Pond.

Processed wastewater flows into the condensate Holding Pond, and periodically, the waste water is discharged together with the condensate water to the injection wells. Oil and used oil which have been separated from the Oil Trap are contained in the drum. Then together with the drum, used oil from the workshop is used by a third party processing the used oil. The diagram of wastewater treatment is shown in the following figure.

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Figure 0-6 Waste Water Treatment Diagram

4) Chemical storage

The PLTP (Geothermal Power Plant) is also equipped with a tank of liquid chemicals and solid chemicals warehouse. Liquid chemicals comprises among others sulfuric acid or hydrochloric acid, oil, and other liquid fuels, while solid chemical consists of for example alum, chlorine, and so on. The liquid chemical storage tank is surrounded by the bundwall as a barrier to prevent spills from the tank from spreading throughout the water ditch, so that it is collected in in the collection sump.

5) Workshop

Workshops are located near the Lay Down area which includes the heavy equipment workshop, machinery workshop and electrical workshop. Heavy equipment and machinery maintenance activities will generate used oil which is then stored in drums. During maintenance activities of machineries and heavy

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equipment there is possibility of oil spills which will be colllected in the oil collection sump. Oil spills which are not collected will be captured by the Oil Trap in the WWTP.

Furthermore, the separated oil is stored in drums, which are then used by the used oil processing plant.

6) Fire fighting system

The project are also equipped with portable fire extinguishers available in every area to overcome minor emergency situation.

For large-scale fires, the project is also equipped with a fire pump and hydrant pipe.

7) Emergency shutdown

In case of emergency, the Geothermal Power Plant is also equipped with an emergency shutdown until all operating units automatically stop safely in a short time. During the emergency shutdown, steam will be temporarily transferred to the Rock Muffler and then released into the atmosphere until the main steam supply valve is fully closed. The Rock Muffler is used to dampen noise when steam is released into the atmosphere (steam venting), during disturbances of turbines operation or Power Plant operation in an emergency. The Rock

Muffler has a length of 13 m, width of 10 m and height of 4 m.

A diesel power generator will also be available at the Power

Plant which will be used to supply power in an emergency.

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8) Project administration office facilities

A project administration office will also be built in the

Power Plant area, which will be furnished with office facilities, lighting, water and sanitation. The administration office is responsible for providing steam production services at SGS, Power Plant as well as access to supply of electricity to PLN.

2.7 DESCRIPTION OF ENVIRONMENTAL MANAGEMENT PERFORMANCE

The implementation of the Environmental Management Plan (RKL) and Environmental Monitoring Plan (RPL) by SEML is based on

ANDAL and RKL-RPL documents in 2013, namely Decree on the

Environmental Permit issued by the Head of Solok Selatan

District Number: 660324-2013 for the Planned Geothermal

Development Activities for 250 MW Muara Laboh Geothermal Power

Plant of Solok Selatan District, West Sumatra Province by PT

Supreme Energy Muara Laboh become an integrated study.

Furthermore ANDAL, RKL and RPL documents and addendum to

ANDAL, RKL and RPL documents shall serve as guidelines for the environmental management and monitoring of Geothermal

Development activities by PT SEML.

1. Change in Air Quality

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Source of impact : Drilling of production wells,

injection wells, and production well testing,

and construction of a Geothermal Power Plant

The acts of managing which has been performed are as follows:

- Securing the location of wells and appling boundary of the

safety zone for the residents in the vicinity in accordance

with the SOP of SEML.

- Workers who work in the vicinity of the wells should be

equipped with personal protective equipment (PPE),,

including portable H2S concentration monitoring tool and H2S

personal detector.

- Maintaining the construction vehicles.

- Limiting the speed of the vehicle to the maximum of 30

km/hours.

- Watering the road during the dry season.

2. Change of Noise Level

Source of impact : Drilling of production well,

injection

well, and production well testing

Management conducted:

- Determining the buffer zone of noise area.

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- The obligation to use hearing protection equipments for

workers around the production test area.

3. Erosion and Sedimentation Changes

Source of impact : Land clearing

The acts of managing which have been performed are as follows:

- Effiorts have been made to control surface water flow by

constructing a catchpond.

- Erosion has been technically controlled by making channels

along the edge of the access road and around the wellpads.

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Figure 0-7 Management of the Potential Landslide by using

Technology

4. Change of Surface Water Quality

Source of impact : Land clearing, production wells, and

injection well drilling, and production well

testing

The acts of manageing whch have been performed are as follows:

- Management has been done over the surface water flow by

constructing catchponds.

- Trees have been planted perpendicular to the stream or in

line with the contour of the erosion prone area.

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5. Disturbance to Terrestrial Flora and Fauna

Source of impact : Land clearing

The acts of managing which have been performed are as follows:

- The land clearing has been matched with the blocking area

and the clearing time is according to the the planned

activities (Results of field observations).

- Revegetation has been done with local tree species and

compacted grass on the the drainage opening area in

particular and the vacant area in general.

- Creating and developing nursery grounds or nurseries to

propagate seedlings of local plants to be used for

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reforestation as presented in Table 0-9 and

- Figure 0-8.

Table 0-9 Type of Wood and Fruit Plants Cultivated in Nursery

Number of No Type of Plant Supplier Seeds

Wood Plants

1 Mahoni 480 Koperasi PKN

2 Kulit Manis 500 Koperasi PKN

3 Meranti 296 Koperasi PKN

4 Trembesi 115 Koperasi PKN

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Number of No Type of Plant Supplier Seeds

5 Meranti - Puspa 186 Koperasi PKN

6 Meranti - Ambun 202 Koperasi PKN

7 Kina - Selibrah 51 Koperasi PKN

8 Surian 231 Koperasi PKN

9 Medang 520 Koperasi PKN

Total 2.581

Fruit Plants

1 Durian 200 Koperasi PKN

2 Nangka Hutan 220 Koperasi PKN

3 Pete 58 Koperasi PKN

4 Matoa 25 Koperasi PKN

5 Manggis 87 Koperasi PKN

6 Alpukat 36 Koperasi PKN

7 Sirsak 48 Koperasi PKN

8 Rambutan 50 Koperasi PKN

9 Makadimia 87 Provided by Site

Support

Jumlah 811

Source: SEML, 2014

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Figure 0-8 Nursery

6. Disturbance to Aquatic biota

Source of impact : Land preparation, production well,

injection well drilling, and production well

testing

The acts of managing which have been performed are as follows:

- The construction of cement drainage on the left and right

sides of the road and its regular maintenance. However,

since the gap between the drainage has not been entirely

covered by land cover crops (compacted grass), there are

some drainages eroding.

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- Several parts of the watershed area of the activity location

are still open and may result in landslides, erosion and

sedimentation.

7. Opening of Employment and Business Opportunities

Source of impact : Labor recruitment

The acts of managing which have been performed are as follows:

- Delivery of information on the employment opportunities and

qualification of the labor needed for the Muara Laboh

Geothermal Power Plant development project in Nagari around

the activity location.

- Selection of candidate workers and recruitment of workers in

accordance with a predetermined formation by giving a higher

priority on labor in Nagari around the activity location.

- Education and training programs for the labor employed in

Muara Laboh Geothermal Power Plant as well as community

empowerment.

8. Opening of Business Opportunities

Source of Impact : Labor recruitment

The acts of managing which have been performed are as follows:

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- With the opening of the access road to the Geothermal Power

Plant development project site in Muara Laboh, SEML has

indirectly supported people to set up new business.

- Programs and activities related to CSR (Corporate Social

Responsibility or CSR) has been implemented even though the

company has not entered production phase

9. Change in the Income of the Community

Source of impact : Labor recruitment

The acts of managing which have been performed are as follows:

- The impact of SEML activity on the income of the people

around the activity location is still insiginificant, as

described below:

o There is only a small number of local people working for

FML.

- Construction of traditional market in Kampung Baru.

- Road asphalting activity around the activity location (Blok

0 and Kampung Baru)

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Asphalting in Blok 0

Ashpalting roads in Kampung Baru

Construction of market in Kampung Baru

Figure 0-9 CSR Activities performed by SEML

10. Change of Values and Social Norms

Source of impact : Labor recruitment

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The acts of managing which have been performed are as follows:

There is no negative environmental impact on values and social norms resulting from labor recruitment activities. Labor who are newcomers in the region did not bring the cultures that influence the pattern of behavior of the local community.

However, this effect needs to be managed so as not to cause negative effects in the future. In addition, recruitment during the construction phase shall prioritize local labor, for the field of work that suits their skills. It aims to develop and maintain the level of public trust in the company's commitment to prioritize local labor.

11. Public Health Disturbance

Source of Impact : Mobilization of equipment and

materials

The acts of managing which have been performed are as follows:

Field monitoring on the types of diseases that have been in existence in 6 parts of villages around the project indicates that there are no additional types of diseases and based on the data from the Puskesma (Public Health Centre) of Pekan

Selasa the disease suffered most by the public is Upper

Respiratory Tract Infections (ISPA), which is in the first rank of the list of the 10 most frequently found diseases.

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Monitoring locations that have been worked on by SEML are as shown in Table 0-10.

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Table 0-10 Location of Environmental Monitoring Points of SEML

Longitude (BT) Latitude (LS) No Code Sampling Type Photos Lokasi Degree Minutes Second Derajat Minute Second

Surface water STA-200 access WP-H,

1 SW-1 and aquatic 101 7 37.06 1 37 31.79 105 meter dari access

biota road

Surface water 121 meter from access 2 SW-2 and aquatic 101 7 31.79 1 36 59.07 D- Sungai

biota

Surface water

3 SW-3 and aquatic 101 8 7.08 1 38 5.40 115 meter dar WP-H

biota

Surface water 100 meter dari 4 SW-4 and aquatic 101 8 1.95 1 36 52.44 jembatan bangko putih biota

110 meter dari Access Surface water road WP-D-Sungai600 5 SW-5 and aquatic 101 7 46.42 1 36 22.01 meter dari akses road biota

taratak Tinggi

Surface water 900 meter ke Intake - 6 SW-6 and aquatic 101 8 32.18 1 37 58.27 1 WP-B

biota

Surface water 900 meter dari Admin 7 SW-7 101 8 51.64 1 37 2.40 and aquatic Building

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Longitude (BT) Latitude (LS) No Code Sampling Type Photos Lokasi Degree Minutes Second Derajat Minute Second

biota

Surface water 153 meter dari STA- 8 SW-8 and aquatic 101 9 3.3 1 36 0.61 900

biota

Flora and 623 meter dari Power 9 FF-1 101 9 0.35 1 36 19.90 fauna Station

Flora and 10 FF-2 101 8 42.53 1 37 48.08 500 meter dari WP-B fauna

Flora and 11 FF-3 101 7 45.43 1 38 4.49 204 meter dari Wp-H fauna

Flora and 100 meterdari access 12 FF-4 101 7 30.93 1 36 49.37 fauna road WP-E

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Longitude (BT) Latitude (LS) No Code Sampling Type Photos Lokasi Degree Minutes Second Derajat Minute Second

13 AQ-1 Water quality 101 7 50.29 1 38 1.64 605 meter dariWP-H

14 AQ-2 Water quality 101 8 27.38 1 37 56.19 251 meter dari WP-B

15 AQ-3 Water quality 101 7 56.51 1 37 44.93 204 meter dari WP-A

250 meter ke arah 16 AQ-4 Water quality 101 8 16.94 1 36 45.94 jurang WP-B

492 meter dari power 17 AQ-5 Water quality 101 8 56.01 1 36 21.53 station

154 meter dari STA- 18 AQ-6 Water quality 101 8 24.3 1 35 45.55 100 Taratak Tinggi

200 meter dari akses 19 AQ-7 Water quality 101 8 33.95 1 35 1.26 jalan Sapan Sari

111 meter dari akses 20 SE-1 Social 101 8 49.81 1 35 22.57 jalan Pekonina

15 meter dari STA-800 21 SE-2 Social 101 8 16.75 1 35 49.94 Taratak Tinggi

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Longitude (BT) Latitude (LS) No Code Sampling Type Photos Lokasi Degree Minutes Second Derajat Minute Second

22 SE-3 Social 101 7 16.26 1 34 27.47 98 meter dari STA-900

175 meter dari akses 23 SE-4 Social 101 6 57.33 1 32 46.22 jalan Ampalu

150meter dariakses 24 SE-5 Social 101 8 29.11 1 34 48.43 jalan Sapan Sari

600 meter dari akses 25 SE-6 Social 101 7 55.56 1 36 13.85 jalan Taratak Tinggi

1000 meter dari akses 26 SE-7 Social 101 9 33.56 1 35 29.50 jalan Liki

75 meter dari STA-200 27 GW-1 People’s Well 101 8 27.34 1 35 44.76 Taratak Tinggi

250 meter dari akses 28 GW-2 People’s Well 101 8 0.25 1 34 44.43 jalan Pinang Awan

300 meter dari akses 29 GW-3 People’s Well 101 8 37.12 1 35 0.69 jalan Sapan Sari

65 meter dari akses 30 S-1 Soil 101 7 50.24 1 38 0.29 jalan WP-H

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Longitude (BT) Latitude (LS) No Code Sampling Type Photos Lokasi Degree Minutes Second Derajat Minute Second

150 meter dari STA + 31 S-2 Soil 101 8 24.77 1 35 55.16 1.800

175 meter dari akses

32 S-3 Soil 101 8 57.87 1 35 57.56 jalan Ampalu

300 meter dari akses 33 S-4 Soil 101 8 33.42 1 37 49.75 masuk WP-B

34 TR-1 Transport 101 8 38.26 1 36 2.17 9meter dari STA-1.800

27 meter dari Blok 35 TR-2 Transport 101 9 0.49 1 35 31.91 Nol

TOTAL 35

Source: SEML, 2014

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CHAPTER III ENVIRONMENTAL BASELINE

For the preparation of Environmental Impact Analysis

(ANDAL) and Environmental Management Plan-Environmental

Monitoring Plan (RKL-RPL) Addendum for Geothermal

Development Activities for 250 MW Geothermal Power Plant

(PLTP), the environmental baseline data presented consists of environmental baseline data at the time of preparation of ANDAL and RKL-RPL of PT Supreme Energy Muara Laboh

(SEML) for the year 2013, environmental baseline data based on Environmental Monitoring Report for the 1st

Period of 2014 and environmental baseline data at the time of preparation of ANDAL and RKL-RPL Addendum documents.

Environmental baseline data used for the preparation of the ANDAL and RKL-RPL Addendum are particularly collected at the planned new PLTP area and representation of new wellpads. The data collection includes the following environmental components:

- Air quality and noise

- Soil

- Terrestrial flora and fauna

- Socio-economic culture

- Public Health

PT Supreme Energy Muara Laboh 211 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

3.1 GEOPHYSICS-CHEMICAL COMPONENTS

3.1.1 Climate

Based on the data obtained from the Indonesian Agency for

Meteorology, Climatology and Geophysics (Badan

Meteorologi, Klimatologi dan Geofisika), Kerinci

Meteorology Station, during the period from 2002 to 2011, the climate pattern around the study area, may be illustrated as follows:

3.1.1.1 Rainfall

Based on Schmidth and Ferguson (1951) climate classification, the area of planned activities is classified as Type A (very wet category). According to the

10 year-base data analysis Q value of is obtained as 0.11, which is categorized as very wet, where the number of dry months which is the number of months with rainfall less than 60 mm is 0.83, and the number of wet months which is the number of months with rainfall more than 100 mm is

9.1.

Between 2002 and 2011, the annual highest rainfall range was 209 mm with the highest rainfall of 405 mm (this occurred in March 2005) and the lowest rainfall was 13.7 mm (this occurred in July 2011), as shown in the following table.

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Table 0-1 Average Rainfall in the past 10 years (2002 -

2011)

Rainfall (mm) Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

2002 256.3 19.2 285.2 257.4 169.6 108 288.8 81.1 169.7 97.1 233.8 344.8

2003 319.9 289.9 172.7 371 174.9 25.7 201.7 286.3 309.4 229.5 123.3 200.7

2004 232.4 136.6 393.1 233.4 208.6 45.3 282.8 51.5 47 282.2 275 236.6

2005 100.8 69 405.8 183.8 157.2 102.1 89.5 255.1 215.6 265.5 330.2 209.8

2006 280.9 269.7 158.3 379.4 142.4 120.2 119.5 76.1 150.1 105.5 179.5 206.2

2007 333.9 131.7 169.4 218.8 201.8 135.8 234.1 139.1 215.8 166.4 145.3 305.1

2008 144.3 132.8 315.4 239.4 228.9 64.8 82.1 169.9 114.4 276.1 216.5 290.1

2009 160.2 318.2 323 200.5 192.2 149.1 77 115.8 128.4 199.6 310 280.6

2010 122.3 371.5 190.6 241.7 119.9 192.1 309.9 329.1 239.3 352.8 275.8 285.1

2011 82.2 57.7 58.9 328.4 104 44.5 13.7 40.5 82.7 215.4 251.5 148.9

Source: Indonsian Agency for Meteorology, Climatology and

Geophysics (Badan Meteorologi, Klimatologi dan Geofisika),

Meteorology Station Kerinci,

Complete monthly rainfall data for the past 10 years are presented in Figure 0-1.

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Year

Figure 0-1 Average Rainfall and Number of Annual Rain

Days in the Study Area

3.1.1.2 Speed and Wind Direction

From the data of speed and wind direction of the

Indonesian Agency for Meteorology, Climatology and

Geophysics (Badan Meteorologi, Klimatologi dan Geofisika),

Kerinci Meteorology Station, for 2007-2013, it is recorded that the average wind speed in the study area was 1.12 m/second. The annual average wind speed around the study area is presented in Figure 0-2.

214

Figure 0-2 Average Annual Windrose

3.1.2 Air Quality

From the measurement results based on the Environmental

Monitoring Report for the 1st Period of 2014, the ambient air quality monitoring was performed in five (5) locations. The analysis results of ambient air quality are presented in Table 0-2 as follows.

Table 0-2 Result of Monitoring of Ambient Air Quality

Based on the Monitoring Report for the 1st

Period of 2014

Sampling location No Parameter Unit BML* 1 2 3 4 5

1 Dust µg/Nm3 12.08 8.94 24.15 12.99 8.35 230

(TSP)

215

Sampling location No Parameter Unit BML* 1 2 3 4 5

3 2 H2S µg/Nm 6.37 5.36 3.98 3.64 2.99 27.8

3 3 SO2 µg/Nm 313.09 247.97 250.21 230.11 100.65 900

3 4 NO2 µg/Nm 97.72 70.94 57.50 28.33 25.96 400

5 CO µg/Nm3 277.01 190.97 35.77 84.87 50.08 30,000

Source: Air Quality Laboratory Analysis Results, Unand

Faculty of Engineering, 2014

*In accordance with Government Regulation No. 41 of 1999; H2S parameter is in accordance with Decree of the Minister of the

Environment No. 50 of 1996.

Sampling location:

1. Wellpad H (WP-H)

2. Around the Planned Power Plant Location

3. Kampung Baru

4. Pinang Awan

5. Wellpad C (WP-C)

The results of air quality measurement performed at three

(3) locations at the time of the preparation of this

Environmental Impact Analysis (ANDAL) and Environmental

Management Plan-Environmental Monitoring Plan (RKL-RPL)

Addendum are shown in Table 0-3.

216

Table 0-3 Results of Measurement of Ambient Air Quality,

November 2014

Analysis Results Parameter Units BML*) Conclusion AQ1 Scale AQ2 Scale AQ3 Scale

32.8 3 SO2 µg/Nm 900 30.50 5 26.30 5 5 5 0

3,23 CO µg/Nm3 30,000 3,265 4 3,299 4 4 4 2

22.5 3 NO2 µg/Nm 400 25.10 5 33.50 5 5 5 0

24.5 3 O3 µg/Nm 235 22.60 5 23.10 5 5 5 0

HC µg/Nm3 160 96 4 98 4 92 4 4

TSP µg/Nm3 230 35 4 34 5 44 5 5

<0.0 Pb µg/Nm3 2 <0.08 5 <0.08 5 5 5 8

Source: Measurement results by PT KehatiLabIndonesia for

SEML, 2014

Remarks:

*) Government Regulation Number 41 of 1999 on Air

Pollution Control

N Dry Air Inhalation Volume Unit corrected at Normal

Condition (25°C, 76 cmHg)

Ash (TSP) and Lead (Pb) measurement

AQ1 : Wellpad ML-09 activity location 217

AQ2 : Planned new Geothermal Power Plant location

AQ3 : Wellpad ML-F activity location

The result of two (2) air quality measurements shows that in general the air quality around of the study areawas still very good and all parameters of ambient air quality still fulfilled the standard value required in Government

Regulation of the Republic of Indonesia No. 41 of 1999.

Based on the abovementioned description, it is found that the environment and ambient air quality are in good condition (scale 4) and the impact is significant (scale

3).

3.1.3 Noise level

Noise level measurement was done at the same location as the location of ambient air quality measurement.

Results of noise level measurement at each area can be seen in Table 0-4 and Table 0-5.

Table 0-4 Results of Monitoring of Noise Level Based on

Report on Monitoring for the 1st Period of 2014

Noise No Sampling location Units BML* Level

1 Wellpad H (WP-H) dB(A) 79.5 85

2 Planned Power Plant proximity dB(A) 51.2 65

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Noise No Sampling location Units BML* Level

3 Kampung Baru dB(A) 59.2 60

4 Pinang Awan dB(A) 63.3 60

5 Wellpad C dB(A) 50.9 85

*Point 1 and 5 in accordance with Regulation of the

Minister of Manpower and Transmigration (PerMenakertrans)

No. 13/2011; points 2,3,4 based on Decree of the State

Minister for the Environment (KepMenLH) No. 48/1996

Source: Air Quality Laboratory Analysis Results, FT Unand,

2014

The results of noise level measurement at the time of preparation of this ANDAL and RKL-RPL Addendum document performed at four (4) locations are shown in Table 0-5.

Table 0-5 Noise Levels at Locations of Measurement,

November 2014

Noise Observation Code BML Level Scale location dB(A)

Wellpad ML-09 AQ 1 55 37.8 4 activities location

Planned new AQ 2 70 60 3 Geothermal Power

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Noise Observation Code BML Level Scale location dB(A)

Plant location

Wellpad ML-F AQ 3 70 57 3 activities location

Camp Site Office AQ 4 70 58 3 Location

Source: Measurement results by PT KehatiLabIndonesia for

SEML, 2014

Remarks:

Noise level based on Kep-48/MENLH/11/1996

*) Industry70 dB (A)

Noise level at a number of measurement locations is between 37.8 and 79.5 dBA. Measurement results in general indicated that the noise condition still meets the standard value required based on Kep-48/MENLH/11/1996, both for industrial activities (outdoor) and residential area. The high level of observation at Wellpad H location was due to the fact that the observation was made during the process of production testing.

220

Based on the abovementioned description, it is found that the environmental quality for noise is in medium condition

(scale 3) and the impact is significant (scale 3).

3.1.4 Topography

The Solok Selatan District is located at 350-430 meters above sea level, with a topography (landscape) varying between undulating, hilly and mountainous plains and valleys, which are part of the Bukit Barisan Mountains that extend from the north to the south along the west coast of Sumatera.

Further, topographically, 69.19% of the Solok Selatan area is located at a slope of above 40 degrees, which is classified as very steep and prone to the dangers of landslides, and only approximately15.02% are relatively flat and sloping. landslide The Solok Selatan District may be classified into three area types: (1) undulating plateau area located at the Eastern part, from Lubuk

Malako in Sangir Jujuan Disrict northwards up to Sangir

Batang Hari District ; (2) hilly area, more dominantly covering Solok Selatan District, from the North to its central part. (3) the foothills of the valley area which is in the Western part of the area bordering on the

Pesisir Selatan District and the Southern part, which is the base of Mount Kerinci.

221

3.1.5 Physiology and Geology

Physiography is characterized by a fault zone which is associated with an active vulcano. Solok Selatan District is located on Sumatra Great Fault System (Sumatra Fault), which is known as Semangko Fault, and is still active.

Sumatra Fault stretches 1,650 kilometers along Teluk

Semangka on the southern end to the Lembah Aceh on the northern end of Sumatra Island. In general, the direction of Sumatra Fault Zone is from the southeast to the northwest, that is parallel to the longitudinal axis of

Sumatra Island.

Based on regional tectonics (tectonic plates), the Sumatra

Fault Zone is also a "Magmatic Arc Zone". The planned activities area is part of the "thrown down block" which relates to the shift of the Great Sumatran Fault (Semangko

Fault) to the right, and is composed of pre-tertiary rock products until the final quarternary of volcanic rocks that consist of complex metamorphic rocks and volcanic rock units. Volcanic rocks are differentiated into units of tertiary volcanic rocks and volcanic quarternary, which in general are inseparable volcanic rocks, consisting of alternations of lava, volcanic breccias and tuffs (Map

0-2).

The cross-sectional lithologicl condition of drilling results can be seen in Table 0-6 and Figure 0-3

222

Table 0-6 Lithological Description

Volcanic Depth (m MD) Lithology Description Facies

Surface up to 600 Proximal - Consisting of andesitic

Medial to ballistic lava flows

and pyroclatic rock that

mainly consist of tuff

breccias and minor tuff

which are associated

with Mount Patah

Sembilan volcanic

products.

600 up to 1,000 Medial Consisting of

pyroclastic and volcanic

breccias and tuffs that

are associated with

Mount Patah Sembilan

volcanic products.

1,100 up to 1,400 Medial – Consisting of Proximal pyroclastic rocks

(dominated by volcanic

breccias) and a small

flow of basatic

andesitic. The

distribution of rocks in

223

Volcanic Depth (m MD) Lithology Description Facies

this layer can be

associated with Mount

Patah Sembilan volcanic

products.

1,400 up to 1,400 Medial Comprising mostly of

pyroclastic rocks.

Lithology consists of

volcanic breccias and

tuffs that are

associated with the

oldest Mount Patah

Sembilan volcanic

products.

Source: SEML Sub-surface Department, 2012

224

Figure 0-3 Lithological Cross-Section

225

Map 0-1 Topography in the Proximity of Activity Location

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Map 0-2 Geological Site of PLTP Muara Laboh (Muara Laboh Geothermal Power Plant)

227

3.1.6 Geotechnics and Seismicity

Historically, soil movement may occur due to the steepness of the slopes or when triggered by a huge earthquake causing rock falls etc.

Based on the map of the West Sumatra Provincial Land

Movement at a scale of 1: 1,000,000, in general the observation area has the characteristics of potential ground motion with low to medium levels (Map 0-3).

Based on the Earthquake Vulnerability Map (Geology Agency,

2000), Sumatra is divided mainly into 5 areas of earthquake vulnerability, namely Aceh, North Sumatra, West

Sumatra, Bengkulu, and Lampung areas; with a variable seismic intensity rate from V to more than VII on the MMI scale (

Figure 0-4). West Sumatera area which is also an observation area is an area of destructive earthquakes with seismic intensity from V to VII or above on the MMI scale.

Results of a geotechnical survey preliminary study conducted by SEML with Golder Associates, with the aim of identifying disaster potentials (geological hazards) or obstacles that might occur at the operating phase or geothermal field development, indicates that the Liki

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Pinangawan Muara Laboh Geothermal Mining Work Area (WKP) is located in a zone of relatively high seismicity (Zone

5), because it is located along Muara Laboh “Graben” Fault which is associated with the Great Sumatran Fault zone (

229

Map 0-4).

230

This study also indicates the potential existence of a number of geological hazards in this area with a level of probability of occurrence from low to moderate, comprising of debris flow, flooding, landslides, soil surface cracks caused by movement of the fault, the vibration caused by seismicity/earthquake, rock fall and consequential effects of volcanic eruptions.

231

P. WE LAUT MINDANAO SKALA (SCALE) 1 : 10 000 000 BANDA ACEH L A U T C I N A S E L A T A N 100 50 0 100 200 300 400 km G. Peuet-Sagoe

Burni Telong I _ P. NATUNA G. Sangir KEP. TALAUD

MEDAN G. Awu XVII KEP. ANAMBAS KEP. SANGIR

G. Banua Wuhu

P. SIMEULEU XXIV G. Karangetang P. MOROTAI L A U T N A T U N A G. Ruang L A U T S U L A W E S I G. Dukono MANADO G. Tangkoko G. Ibu G.Lokon P. NIAS G. Mahawu II _ G. Gamkonora P. BINTAN G. Soputan G. Gamalama PAKANBARU P. HALMAHERA TERNATE G. Sorik Marapi XVI KEP. RIAU GORONTALO G. Kie Besi Tel. Breda P. WAIGEO G. Colo (Una-una) KEP. BATU KEP. TOGIAN G. Marapi PONTIANAK SAMARINDA TEL. TOMINI L A U T M A L U K U XVIII G. Tandikat P. BACAN MANOKWARI P. BIAK PADANG PALUXV LAUT CAROLINE III G. Talang P. SIBERUT XX XXVII Tel. Balikpapan P. OBI G. Kerinci JAMBI XXVI P. BANGKA KEP. SULA KEP. BANGAI P. MISOOL P. SIPORA P. YAPEN PANGKALPINANG PALANGKARAYA Tel. Tolo L A U T S E R A M XXI JAYAPURA P. BELITUNG KEP. PAGAI P. SERAM PALEMBANG TEL. CENDRAWASIH P. BURU BANJARMASIN IRIAN Tel. Mandar Tel. Sebakar G. Kaba AMBON XXII BENGKULU P. LAUT G. Dempo XXV KENDARI XIX IV XIII Tel. Etna XXIII G. Banda Api TIMIKA

L A U T J A W A P. BUTON MAKASSAR L A U T B A N D A P. ENGGANO BANDARLAMPUNG XIV KEP. KAI G. Manuk V P. BAWEAN P. KABAENA KEP. TUKANGBESI KEP. ARU Tel. Flamingo G. Krakatau JAKARTA P. SELAYAR SERANG G. Lagatala (Serua) XXVIII L A U T F L O R E S G. Nieu Werkerk G. Wetar G. Tangkubanparahu G. Laworkarwa (Nila) G. Emperor of China L A U T A R U G.Ciremai KEP. KANGEAN G.Gede SEMARANG P. MADURA G. Serawawerna (Teon) BANDUNG VIII G. Dieng G.Slamet G. Wurlali G. Sundoro G. Galunggung SURABAYA P. KOLEPOM G.Papandayan JAWA VI G. Guntur G. Merapi P. YAMDENA G. Arjuno Welirang P. WETAR YOGYAKARTA G. Batu Tara KEP. BABAR G. Kelud G. Bromo XII G. Ijen G. Butak Petarangan P. ALOR P. BALI G. Batur P. SUMBAWA G. Semeru G. Raung P. LOMBOK G. Ililewotolo _ G. Rokatenda G. Lereboleng G. Iliboleng G. Rinjani G. Tambora G. Sangeang Api G. Agung G. Anak Ranakah P. FLORES G. Iliwerung G. Sirung VII G. Inielika IX MATARAM G. Ebulobo G. Lewotobi Laki-laki DENPASAR G. Kelimutu G. Lewotobi Perempuan G. Iya L A U T T I M O R L A U T A R A F U R A SELATX SUMBA XI + _ + _ + _ P. SUMBA L A U T S A W U P. TIMOR

KUPANG P. SAWU

P. CHRISMAST P. ROTE

SKALA (SCALE) MMI INDONESIA EARTHQUAKE HAZARD PRONE AREAS MMI MMI MMI MMI < V V- VI VI- VII >VII NOMOR WILAYAH GEMPABUMI MERUSAK REGION NUMBER OF DESTRUCTIVE EARTHQUAKE

Sesar utama di darat I Aceh XI Timor - Alor XXI Jayapura Main fault on land II Sumatera Utara (North) XII Yamdena XXII Paniai & Nabire Sesar sungkup utama di darat Main thrustfault on land III Sumatera Barat (West) XIII Sulawesi Selatan (South) XXIII Wamena (Jayawijaya) IV Bengkulu Sulawesi Tenggara Sesar utama lepas pantai XIV (Southeast) XXIV Tarakan Main fault offshore V Lampung XV Sulawesi Tengah (Central) XXV Kalimantan Selatan (South) VI Jawa Barat (West) Sesar turun lepas pantai XVI Sulawesi Utara (North) XXVI Peleng Normal fault offshore VII Yogyakarta XVII Sangir & Talaud XXVII Biak Sesar belakang busur lepas pantai VIII Lasem XVIII Halmahera Back-Arc thrust offshore XXVIII Aru IX Bali - Lombo XIX Ambon Lajur tunjaman lepas pantai Subduction zone offshore X Flores - Sumbawa XX Kepala Burung (Bird Head)

Figure 0-4 Indonesian Seismic Zone

232

Map 0-3 Soil Movement Vulnerability in Solok Selatan District

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Map 0-4 Seismic Notes from 2004 2013 –

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3.1.7 Hydrogeology

Rocks that are outside of the observation area, in particular the northern area along the Great Sumatran

Fault, from Lake Singkarak, Solok to the observation area, consist of metamorphic and igneous rocks which have the characteristics of being solid and hard with very low water transmissivity, part limestone, old volcanic rocks (tertiary) which have relatively moderate water transmissivity properties, and young volcanic rocks (quarternary), which have moderate to high water transmissivity characteristics.

Based on the water transmissivity from the aforementioned rocks, particularly loose sedimentary and half solid rocks on the surface of the observation area, are rocks that absorbs metereoric water or rain water, causing water to be absorbed downwards because it has moderate to high water transmissivity properties.

Similarly, younger volcanic rocks on the surface of the observation area can absorb rain water into the subsurface. In areas outside the observation area, old and young volcanic rocks on the surface may serve to absorb meteoric or rain water from the surface to the subsurface.

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At the subsurface, old and young volcanic rocks, particularly in the observation area, have water transmissivity levels of moderate to high, and they can serve as a good aquifer with moderate to high level water transmissivity properties. It is suspected that rocks in the observation area can serve as a rock reservoir, and hard rock at the subsurface can serve as a bedrock that is heated by a heat source either from magma underneath Mount Patah Sembilan or also by magma from the intrusive rocks (grano-diorite) around Hidung

Mancung. As such, from a hydrogeological perspective, the observation area is an area that has good geothermal

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Map 0-5).

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Map 0-5 Hydrogeology of Solok Selatan District

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3.1.8 Hydrology

The Solok Selatan District is passed by 18 river flows.

Five of them are in Sangir District, three in Sungai

Pagu District and 10 rivers in other districts. The rivers that flow generally have adequate depth, are permanent and have fairly swift currents. In addition,

Solok Selatan District is also one of the four regencies included in the Batanghari upstream watershed (Daerah

Aliran Sungai / DAS) which flows to the east coast.

Based on the 2008 UKL-UPL document, some information regarding the hydrology of the Liki Pinangawan Muara

Laboh Geothermal Mining Work Area (WKP) can be described as follows.

River Characteristics

At the Liki Pinangawan Muara Laboh Geothermal Mining

Work Area (WKP) there are several large and small rivers, both that cross the study area and on the outskirts of the site such as Batang Liki, Batang Bangko

Jernih, Batang Pulakek, and Batang Sapan. The existing rivers generally have a large number of rocks. In general, the rivers are shallow, ranging between 0.5 m and 1.5 m. The quality and quantity of river water is influenced by seasonality, although generally river

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Stream Pattern

The Liki Pinangawan Muara Laboh Geothermal Mining Work

Area (WKP) has a branching tree-like flow (subdendritic pattern). The flow pattern is turbulent, due to the sloping topography and number of rocks, thus great aeration occurs. Generally, this pattern is found in hilly areas with a large number of tributaries and hard rocks.

Catchment Area Condition

The coefficient of flow in Liki Pinangawan Muara Laboh

Geothermal Mining Work Area (WKP) ranges between 0.25 and 0.30. This value indicates that the amount of rainwater that runs off the surface is between 25% and

30%. On the contrary, the amount of rainwater that seeps into the soil is between 70% to 75%. In the meantime, determining the rate of surface water runoff refers to water absorption on the soil surface and rainfall. Based on the abovementioned description, it can be predicted that surface water runoff is in good condition (scale 4) and the impact is significant (scale 3).

River Water Utilization

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Rivers around the planned activity location, such as the

Batang Liki, Batang, Bangko Jernih, Batang Pulakek, and

Batang Sapan rivers, are commonly used by the community for agricultural activities such as rice fields irrigation, windmill mini-hydro power generation, as well as for bathing and washing (MCK). Small percentage of people use it for fish ponds in the residential area.

Erosion

Erosion is an event of displacement of soil or parts thereof from one place to another by natural media. The calculation result using a model which generates level of erosion danger potentials. In general, the project boundaries have the level of erosion at very mild to moderate. The Figure below is an Erosion Hazard Rate

(Tingkat Bahaya Erosi/TBE) in the catchment area of the activity area. TBE class is in accordance with the standards issued by the Ministry of Forestry (Heraeati,

2010).

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Figure 0-5 Erosion Hazard Levels

Error! Reference source not found.Figure III-5 shows rosion hazard rates at the activity location. In general, the above-mentioned region is in the very mild and moderate zone. Heavy and very heavy zones are generally located outside the boundaries of the project site. Based on land covering data, the area is used as an agricultural area, while the topography is quite largely sloped.

Table 0-7 Erosion Hazard Levels At Project Area

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Erosion Value Erosion Danger Percentage (ton/ha/year) Scale Level*) (%) *)

Very Light < 15 60 1

Light 15 - 60 8 2

Medium 60 - 180 20 3

Heavy 180 - 480 5 4

Very Heavy > 480 6 5

*) Ministry of Forestry (1998) in Herawati (2010)

Based on the abovementioned, it is known that the environmental quality for erosion and sedimentation are in good condition (scale 4) and the impact is significant (scale 4).

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Map 0-6 PLTP Muara Laboh Project Site Hydrology

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3.1.9 Water Quality

3.1.9.1 Surface Water Quality

Environmental monitoring results of three (3) primary rivers estimated to be affected: Bangko Keruh, Bangko

Jernih, and Batang Liki rivers are presented in Table

0-8.

Table 0-8 Results of Monitoring of River Water Quality

Based on Report on Monitoring for the 1st

Period of 2014

Sample Code PP

82/2001 No. Parameter Units KAP.1 KAP.2 KAP.3 KAP.4 Class

I PHYSICS

1 Temperature oC 20.2 19.5 20.5 21.0 Dev.3

2 Total Dissolved mg/L 32.5 30.5 95.6 102.3 1000

Solids (TDS)

3 Total Suspended mg/L 2.4 12.6 4.5 4.8 50

Solids (TSS)

II CHEMICAL

1 pH - 6.67 6.87 6.93 7.04 6 - 9

2 Ammonia (NH3-N) mg/L <0.01 <0.01 <0.01 <0.01 (-)

3 Arsenic (As) mg/L < 0.01 < 0.01 < 0.01 < 0.01 1

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Sample Code PP

82/2001 No. Parameter Units KAP.1 KAP.2 KAP.3 KAP.4 Class

4 DO mg/L 6.8 6.4 6.9 6.3 4

5 Cadmium (Cd) mg/L < < < < 0.01

0.002 0.002 0.002 0.002

6 Oil / Fat mg/L 0.01 0.01 0.01 0.01 1

7 Nitrate (NO3-N) mg/L 1.20 1.45 1.22 1.89 10

8 Nitrite (NO2-N) mg/L < 0.02 < 0.02 < 0.02 0.03 0.06

9 Sulfide (H2S) mg/L < < < < 0.002

0.001 0.001 0.001 0.001

10 Copper (Cu) mg/L < < < < 0.02

0.005 0.005 0.005 0.005

11 Lead (Pb) mg/L < < < < 0.03

0.005 0.005 0.005 0.005

12 BOD mg/L 1.30 0.65 1.45 1.40 3

13 COD mg/L 7.32 3.50 8.44 8.05 25

Source: Chemical Laboratory Analysis Results, FMIPA Unand,

2014

Sample Code Information

KAP.1 = Bangko Keruh River

KAP.2 = Bangko Jernih River

KAP.3 = Batang Liki (Upstream)

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Sample Code PP

82/2001 No. Parameter Units KAP.1 KAP.2 KAP.3 KAP.4 Class

KAP.4 = Batang Liki (Downstream)

Surface Water Physical Study

Waters physical parameters analyzed include temperature, suspended solids (Total Suspended Solid - TSS) and dissolved solids (Total Dissolved Solid - TDS).

Laboratory analysis results indicated that the physics parameters at all sampling locations still meet the quality standards stipulated in Government Regulation

No. 82 of 2001 Class II.

Surface Water Chemical Study

Waters chemical parameters analyzed are in accordance with parameters determined in Government Regulation No.

82 of 2001 In general, all chemical parameters for surface waters still fulfill the determined quality standards. Metal content in the researched surface waters in general does not indicate the presence of

PT Supreme Energy Muara Laboh 247 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW values that exceed the quality standards stipulated in

Government Regulation No. 82 of 2001 Class II.

Based on the abovementioned, it is known that the quality of surface waters (river water) in the proximity of planned activities area remain at medium condition

(scale 3) and the impact is significant (scale 3).

3.1.9.2 Shallow Well Water Quality

To ensure that community water wells are not affected by geothermal development activities, management of sources of impacts are performed.

To determine the effectiveness of management carried out by SEML, monitoring of community water wells quality located around the site was performed. The monitoring was carried out at three (3) locations, namely: community wells in Taratak Tinggi, Sapan Sari and Pinang

Awan areas.

Analysis results of community water wells quality are presented in Table 0-9.

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Table 0-9 Results of Monitoring of Community Well Water

Based on Report on Monitoring for the 1st

Period of 2014

Decree of PP 82/ Sample Code Minister No. Parameter Units 2001 of Health

KAT.1 KAT.2 KAT.3 Class I 907/2002

I PHYSICS

1 Temperature oC 20.2 22.5 21.5 Dev. 3 Dev. 3

2 Total Dissolved mg/L 50.3 56.5 47.3 1000 1000

Solids (TDS)

3 Turbidity NTU 1.5 1.5 2.1 (-) 5

4 Odor - Odorless Odorless Odorless (-) (-)

5 Taste - No Taste No Taste No Taste (-) (-)

II CHEMICAL

1 Arsenic (As) mg/L < 0.01 < 0.01 < 0.01 1 0.01

2 Cadmium (Cd) mg/L < 0.002 < 0.002 < 0.002 0.01 0.003

3 Total mg/L 20.04 22.12 28.80 (-) 500

hardness(CaCO3)

4 Chloride (Cl) mg/L 2.44 3.45 2.60 600 250

5 Nitrate (NO3-N) mg/L 0.34 0.44 1.05 10 50

6 Nitrite (NO2-N) mg/L < 0.02 < 0.02 < 0.02 0.06 3

7 pH - 6.6 6.7 6.3 6 - 9 6.5 -

8.5

8 Lead (Pb) mg/L < 0.005 < 0.005 < 0.005 0.03 0.01

PT Supreme Energy Muara Laboh 249 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Decree of PP 82/ Sample Code Minister No. Parameter Units 2001 of Health

KAT.1 KAT.2 KAT.3 Class I 907/2002

9 Permanganate mg/L 1.32 2.43 1.23 (-) (-)

(KMnO4) value

10 Sulfide (H2S) mg/L < 0.001 < 0.001 < 0.001 0.002 0.05

Source: Chemical Laboratory Analysis Results, FMIPA

Sample Code Information

KAT.1 = Community well (Taratak Tinggi)

KAT.2 = Community well (Sapan Sari)

KAT.3 = Community well (Pinang Awan)

(-) = not required

Analysis results of surface waters at aforementioned

three (3) locations, generally indicates that the water

quality of the shallow wells still meet the quality

standards required by Decision of the Minister of Health

No. 907 of 2002.

3.1.10 Soil Quality

For the agricultural field, soil is a plant growth

media. A good media for plants growth should be able to

fulfil the needs of plants for things such as water,

air, nutrients and should be free from toxic materials

with excessive amounts.

PT Supreme Energy Muara Laboh 250 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Soil reaction indicates acidity or alkalinity/soil alkalinity which is expressed by the pH value. The pH value indicates the amount of hydrogen ion (H) in the soil. The larger the levels of H ions in the soil, the more acidic the soil. In soil, in addition to the hydrogen ion (H) and other ions, are also found hydrogen oxide ions (OH), number of which is inversely proportional to the nnumber of hydrogen ions (H). In acid soils, the amount of hydrogen ions (H) is higher than the number of hydrogen oxide ions (OH), meanwhile on alkaline soil, the number of hydrogen oxide ions (OH) is more than the hydrogen ions (H). If they are the same, then the soil becomes neutral, namely having a pH value of 7 (Agus, Cahyono. 1998).

To determine the effectiveness of management that has been done by SEML, monitoring of soil quality is performed on the soil around the locations. Observations were conducted at four (4) locations, namely: S1 (WP-H),

S2 (WP-B), S3 (WP-C), and S4 (Base camp). The analysis results of land quality are presented in Table 0-10 and

Table 0-11. While soil sampling for the preparation of

ANDAL and RKL-RPL Addendum documents can be seen in

Table 0-12.

PT Supreme Energy Muara Laboh 251 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Table 0-10 Results of Soil Chemical Characteristics Based on Report on Monitoring for the 1st

Period of 2014

Soil (1:1) N- Exchangeable C- P- Exchangeable alkaline reaction total P-ters K-potens. acidity (me / No. Code Layer organic potential cations (me/100g) (pH) (% (ppm) (mg/100g) 100g) (% brt) (mg/100g) H 2O KCl brt) Ca Mg K Na Al H

1 S1 (WP-H) 0-20 5.91 4.64 6.25 0.71 21.67 0.77 17.82 9.84 16.72 3.12 2.12 0.85 3.57

2 20-40 5.26 4.57 5.32 0.63 19.31 0.72 15.24 7.76 14.64 3.01 1.97 0.99 3.74

3 S2 (WP-B) 0-20 5.47 4.63 5.53 0.62 18.42 0.64 12.76 8.31 12.78 2.74 1.65 1.24 4.28

4 20-40 5.53 4.71 4.62 0.57 15.01 0.61 11.86 6.74 9.89 2.45 1.28 1.27 4.32

5 S3 (WP-C) 0-20 5.87 5.12 6.12 0.67 23.07 0.75 16.89 9.56 15.45 3.53 2.01 0.78 4.21

6 20-40 5.69 5.02 5.46 0.59 20.62 0.62 14.25 7.55 13.21 3.09 1.89 0.81 4.16

7 S4 (Base 0-20 5.73 5.21 6.62 0.72 22.45 0.89 14.75 8.98 16.03 2.87 1.94 1.05 3.87

8 Camp) 20-40 5.36 4.86 5.53 0.61 17.73 0.76 12.63 8.03 15.62 2.53 1.31 1.12 3.92

Source: Land Laboratory Analysis Results, FP Unand

PT Supreme Energy Muara Laboh 252 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Table 0-11 Results of Land Physics Based on Report on Monitoring for the 1st Period of 2014

Particle size Drainage Water Content distribution TRP Pore (% Available Permeability Layer Texture Bulk Particle (%volume) No. Code (%brt) (% volume) Water cm/hour (cm) class Density Density vol) pF pF pF (% vol) Sand Ash Pliant pF 2,00 Rapid Slow 1,00 2,54 4,20

Silty 1 S1 0-20 36 57 7 0.64 2.58 70.2 67.2 54.8 45.6 15.8 27.5 6.4 29.8 14.2 clay (WP- 20- Silty 2 H) 39 50 11 0.71 2.18 67.4 64.8 57.2 45.1 17.3 25.6 9.3 27.8 12.1 40 clay

Silty 3 S2 0-20 33 58 9 0.69 2.17 68.3 65.0 54.3 47.3 16.2 26.4 7.2 31.1 13.5 clay (WP- 20- 4 B) 38 49 13 Clay 0.73 2.15 66.1 62.3 56.8 44.2 18.4 23.9 12.3 25.8 10.4 40

S3 Silty 5 0-20 33 56 11 0.72 2.36 69.6 65.2 53.5 46.9 16.8 29.5 10.5 30.1 12.3 (WP- clay

PT Supreme Energy Muara Laboh 253 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

C) 20- 6 35 51 14 Clay 0.79 2.02 61.0 63.4 55.2 42.6 19.3 26.3 14.3 23.3 9.8 40

Silty 7 S4 0-20 35 56 9 0.77 2.44 68.5 63.7 52.6 45.4 16.9 29.7 8.6 29.5 11.7 clay (Base 20- 8 Camp) 39 49 12 Clay 0.81 2.20 63.2 61.2 56.1 42.1 17.4 28.2 11.4 24.7 10.2 40

Source: Land Laboratory Analysis Results, FP Unand

PT Supreme Energy Muara Laboh 254 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Table 0-12 Test Results of Soil Sampling around Activity

Location 2014

Result No Parameter Units S1 S2 S3

A. LAND PHYSICS

1 B.D (Bulk Density) g/cc 1.20 0.84 1.18

P.D (Particle 2 g/cc 2.55 2.47 2.51 Density)

3 Total Pore Space (% vol) 53.1 66.0 52.8

4 Water Content

1 (% vol) 51.5 63.7 51.1

2 (% vol) 43.3 52.7 41.1

- pF 2,54 (% vol) 39.5 45.2 34.7

- pF 4,2 (% vol) 28.8 30.8 22.0

5 Drainage Pore

- Rapid (% vol) 9.8 13.3 11.7

- Slow (% vol) 3.8 7.5 6.4

6 Available Water (% vol) 10.7 14.4 12.7

7 Permeability cm/hour 0.63 1.04 0.81

B. LAND CHEMISTRY

1 pH

- H2O - 3.78 4.74 4.11

- KCl - 3.49 4.52 3.86

2 C. Organic % 0.19 2.30 2.02

PT Supreme Energy Muara Laboh 255 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Result No Parameter Units S1 S2 S3

3 N. Total % 0.05 0.17 8

mg/100 4 P2O5 (HCl 25 %) 2 5 12 g

mg/100 5 K2O (HCl 25 %) 3 7 19.22 g

6 P2O5 bray ppm 7.25 15.63

Cation structure 7 (NH4-Act)

me/100 - Ca 1.83 2.88 1.96 g

me/100 - Mg 1.33 1.75 1.62 g

me/100 - K 0.14 0.12 0.16 g

me/100 - Na 0.04 0.07 0.05 g

Cation Exchange me/100 8 11.27 Capacity g

9 Acidity

me/100 - Al-Exchange 4.11 1.56 2.18 g

me/100 - H-Exchange 5.26 3.45 3.94 g

PT Supreme Energy Muara Laboh 256 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Result No Parameter Units S1 S2 S3

10 Texture

- Sand % 27 28 21

- Dust % 53 47 51

- Pliant % 20 25 28

Source: Analysis results by PT KehatiLabIndonesia for SEML,

2014

3.2 BIOLOGICAL COMPONENT

3.2.1 Terrestrial flora and fauna

3.2.1.1 Flora

Liki Pinangawan Muara Laboh Geothermal Mining Work Area (WKP) includes protected forests and other land uses, and adjacent to the Kerinci Seblat National Park (Taman Nasional Kerinci

Seblat/TNKS) to the west.

The Kerinci Seblat National Park (Taman Nasional Kerinci

Seblat/TNKS) was first declared as a candidate for National

Park status by Statement Letter of the Minister of Agriculture

No. 736/Ministry of Agriculture/X/1982 dated October 10, 1982, namely a combination of a group of forests in four (4) of

Provinces which largely consists of Protected Forests, Nature and Wildlife Reserves. It was then designated as a National

Park by Decision of the Minister of Forestry No. 1049 / Kpts-

PT Supreme Energy Muara Laboh 257 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

II / 1982, dated November 12, 1992, and subsequently by

Decision of the Minister of Forestry No. 192 / Kpts-II / 1996, dated May 1, 1996 with an area of 1,368,000 ha. Following a boundaries structuring, based on Decision of the Minister of

Forestry No. 901/Kpts-II/1999 the area of TNKS became

1,375,349.867 hectares, and in 2004 by Decision of the

Minister of Forestry No. 420/Menhut-II/2004, which includes as

Permanent Production Forest the Sipurak Hook forest group area located in Merangin District, Jambi Province, covering 14,160 ha into the TNKS, so that the current TNKS area becomes

1,389,509.867 hectares.

The Kerinci Seblat National Park (Taman Nasional Kerinci

Seblat / TNKS) is administratively located in four (4) administrative regions, namely: Jambi, West Sumatra, Bengkulu, and South Sumatra provinces, which span across the Bukit

Barisan Mountains on the island of Sumatra. Geographically,

TNKS is located at coordinates 100°31’18”E-102°44’01”E dan

1°07’13”S-1°26’14”S.

The Kerinci Seblat National Park is a conservation area which becomes an ASEAN Heritage Site as well as a World Heritage

Site of UNESCO, and is regarded as a world heritage because it has a ecosystem completeness, and its biodiversity is fairly exhaustive, with not less than 370 birds, 90 mammals, 8 primates and various types of reptiles, amphibians, fish and insects as well as 4,000 plant species which are dominated by

PT Supreme Energy Muara Laboh 258 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the Dipterocarpaceae family. A number of plants and wildlife are endangered and protected.

The result of field observation carried out at the location of

Geothermal Development Activities for 250 MW Muara Laboh

Geothermal Power Plant (PLTP) at Solok Selatan District by

SEML, indicates that there has been no significant progress related to the condition of the vegetation/flora and fauna/wildlife at the activity location. It is seen from several types of ecosystems that exist at the activity location and its surrounding areas, such as on paddy fields, mixed garden, or at the outskirts of undergrowth and forest.

The field observation result by using plotting and inventory method is presented in Table 0-13 to Table 0-18.

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Table 0-13 Species of Trees found at Wellpad H Location

N Family Type K KR F FR D DR NP ID o

0.01 24.00 1.50 24.00 12.41 29.15 77.15 - 1 Clusiaceae Calophyllum inophyllum 5 0 0 0 7 1 1 0.349

0.01 16.00 1.00 16.00 12.06 28.33 60.33 - 2 Ixonanthaceae Ixonanthes icosandra 0 0 0 0 8 2 2 0.323

0.01 20.00 1.25 20.00 47.93 - 3 Fagaceae Quercus wallichiana 3.381 7.937 3 0 0 0 7 0.293

0.00 0.25 21.30 29.30 - 4 Podocarpaceae Dacrydium elatum 4.000 4.000 9.075 3 0 4 4 0.227

Calophyllum 0.00 0.50 18.11 - 5 Clusiaceae 8.000 8.000 0.899 2.110 pulcherrimum 5 0 0 0.169

Hamamelidacea 0.00 0.25 13.80 - 6 sp1 4.000 4.000 2.473 5.806 e 3 0 6 0.142

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0.00 0.25 - 7 Clusiaceae Cratoxylon ligustrinum 4.000 4.000 0.534 1.254 9.254 3 0 0.107

0.00 0.25 - 8 Meliaceae Toona sp. 4.000 4.000 0.442 1.037 9.037 3 0 0.106

0.00 0.25 - 9 Moraceae Artocarpus sp. 4.000 4.000 0.413 0.969 8.969 3 0 0.105

1 0.00 0.25 - Lauraceae Litsea sp 4.000 4.000 0.385 0.903 8.903 0 3 0 0.104

1 0.00 0.25 - Moraceae Ficus grossularioides 4.000 4.000 0.322 0.755 8.755 1 3 0 0.103

1 0.00 0.25 - Myrsinaceae Ardisia elliptica 4.000 4.000 0.188 0.442 8.442 2 3 0 0.100

0.06 42.59 Total 100 6.25 100 100 300 2.129 3 5

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Table 0-14 Types of Saplings Found at Wellpad H Location

No Family Type K KR F FR D DR NP ID

0.02 22.22 0.50 25.00 0.68 23.01 70.23 -

1 Clusiaceae Calophyllum pulcherrimum 0 2 0 0 6 7 9 0.340

0.02 22.22 0.50 25.00 0.45 15.21 62.43 -

2 Fagaceae Quercus wallichiana 0 2 0 0 3 5 7 0.327

Ixonanthaca 0.02 22.22 0.25 12.50 0.76 25.81 60.53 -

3 e Ixonanthes icosandra 0 2 0 0 9 5 7 0.323

0.01 11.11 0.25 12.50 0.52 17.71 41.32 -

4 Moraceae Artocarpus sp. 0 1 0 0 8 2 3 0.273

0.01 11.11 0.25 12.50 0.38 12.90 36.51 -

5 Lauraceae Litsea sp 0 1 0 0 5 7 8 0.256

0.01 11.11 0.25 12.50 0.15 28.94 -

6 Rubiaceae Coffea robusta 0 1 0 0 9 5.334 5 0.226

Total 0.09 100 2.00 100 2.98 100 300 1.745

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0 0 0

K= Density; KR= Relative Density; F= Frequency; FR= Relative Frequency; D= Dominance; DR=

Relative Dominace; NP= Important Value; ID= Diversity Index

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Table 0-15 Types of Seedling/Herbs found at Wellpad H

Location

No Type Abundance

1 Eugenis sp ++

2 Calamus sp ++

3 Symplocos sp +

4 Melastoma sp +++

5 Zyngiber sp +++

6 Syzigium sp +

7 Callophyllum sp ++

8 Homalomena sp +++

9 Macaranga sp +

10 Fiicus sp +

11 Nephrolepis sp +++

Remarks +++ = Many; ++ = Medium ; + = Few

Table 0-16 Types of Seedling / Herbs found at Wellpad B

Location

No Type Abundance

1 Laportea stimulan +

2 Baccaurea sp +

3 Sauraia sp +++

4 Toona sureni +

5 Cratoxylon ligustrinum +

PT Supreme Energy Muara Laboh 264 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

No Type Abundance

6 Endospermum sp ++

7 Callophyllum sp ++

8 Schima walchii +

9 Aporosa sp ++

10 Ixonanthes icosandra ++

11 Elaocarpus sp +

12 Alseodaphne sp +

13 Boehmeria sp +

14 Beilschmiedia sp +

15 Omalanthus sp +++

16 Callophyllum innulifolium +

Remarks +++ = Many; ++ = Medium ; + = Few

Table 0-17 Types of Plants in the Proximity of Planned

Power Plant Location

No Type Local Name Abundance

1 Trema orientalis Indarung ++

2 Lantana camara - ++

3 Stachytarpeta sp Bujang kalam +++

4 Coffea robusta Kopi ++

5 Borreria alata - +++

6 Imperata cylindrica Ilalang +++

7 Piper aduncum Sirih-sirih ++++

PT Supreme Energy Muara Laboh 265 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

No Type Local Name Abundance

8 Ficus pandana - +++

9 Polygala paniculata Akar wangi ++

10 Ficus rubra - +

11 Mimosa pygra Putri malu ++++

12 Litsea sp Madang ++

13 Cinnamomum burmanii Kulit manis ++

14 Ixonanthes sp - +

15 Macaranga triloba - +++

16 Aleurites moluccana Damar +

17 Macaranga tanarius - +

18 Omalanthus sp - ++

19 Biden pillosa - ++

20 Sauraia sp - ++++

21 Clibadium sp - +++

22 Eupatorium inulifolium - +++

23 Ageratum coniziodes Sibusuak +++

24 Cratoxilon sp - +

25 Biden pillosa - ++

26 Lagerstoemia sp - +

Remarks +++ = Many; ++ = Medium; + = Few

Table 0-18 Plant Species found Wellpad E Location

No Type Local Name Abundance

PT Supreme Energy Muara Laboh 266 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

No Type Local Name Abundance

1 Coffea robusta Kopi ++++

2 Musa sp Pisang rimbo ++++

3 Villebrunea sp Lasi +++

4 Zingiber sp supadeh ++

5 Elatostemasp - +++

6 Laportea stimulan Jilatang +

7 Ficus pandana - ++

8 Lithocarpus sp - +

9 Evodia sp - +

10 Magnolia sp - +

11 Colocasia gigantea Kamumu +

12 Mikania micranta - ++++

13 Havea brasiliensis Karet +++

14 Abutilon sp - +

15 Crassocepalum sp - +

16 Gliciridia sp - +

17 Boehmeria sp - +

18 Cucurcuma sp Kunyit +

19 Mimosa pudica Putrimalu ++

20 Mimosa pygra Putrimalu +++

Remarks +++ = Many ; ++ = Medium ; + = Few

From the survey results performed at the time of ANDAL and

RKL-RPL Addendum document preparation, location of the

PT Supreme Energy Muara Laboh 267 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW wellpad construction plan is in an area of rice fields, generally located not far from the village residential area. Species of flora found in rice fields are generally dominated by rice plant (Oryza sativa) as well as several types of gulma (weeds). Results of inventory can be seen in Table 0-19.

Table 0-19 Types of Flora found at WP ML 09 Location

PP No Type Abundance IUCN CITES Ket 7/1999

1 Ageratum conyzoides +++ - - -

2 Albizia moluccana + - - -

3 Alpinia galanga + - - -

4 Areca catechu ++ - - -

5 Arenga pinnata + - - -

6 Artemisia scoparia + - - -

7 Begonia sp. + - - -

8 Biden spilosa ++ - - -

9 Bougainvillea + - - -

spectabilis

10 Borreria alata ++ - - -

11 Carica papaya + - - -

12 Cassia alata ++ - - -

13 Celosia cristata + - - -

14 Cymbopo goncitratus + - - -

PT Supreme Energy Muara Laboh 268 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

PP No Type Abundance IUCN CITES Ket 7/1999

15 Cinnamo mumburmanii + - - -

16 Citrus hystrix + - - -

17 Clibadium +++ - - -

surinamense

18 Clidemi ahirta ++ - - -

19 Cocos nucifera + - - -

20 Colocasia esculenta + Least - -

concern

21 Cordilyne sp. + - - -

22 Crassocephalum ++ - - -

crepidioides

23 Cucurbi tapepo + - - -

24 Curcuma domestica + - - -

25 Cyathea sp. ++ - - -

26 Cyperus kyllingia +++ - - -

27 Desmodium sp. + - - -

28 Dracaena marginata + - - -

29 Eupatorium odoratum +++ - - -

30 Ficus padana + - - -

31 Glochidion sp. + - - -

32 Hibiscus rosa- + - - -

sinensis

PT Supreme Energy Muara Laboh 269 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

PP No Type Abundance IUCN CITES Ket 7/1999

33 Hyptisca pitata ++ - - -

34 Lantana camara +++ - - -

35 Macaranga javanica. + - - -

36 Macaranga tanariu + - - -

37 Mangifera indica + - - -

38 Manihot esculenta + - - -

39 Melastoma ++ - - -

malabathricum

40 Meremia sp. + - - -

41 Mikania micrantha +++ - - -

42 Mimosa pigra +++ - - -

43 Mimosa pudica ++ Least - -

concern

44 Musa paradisiaca ++ - - -

45 Ocimum sanctum ++ - - -

46 Oryza sativa +++ - - -

47 Penisetum sp. + - - -

48 Piper aduncum ++ - - -

49 Polygala paniculata ++ - - -

50 Psidium guajava + - - -

51 Saccharum ++ - - -

officinarum

PT Supreme Energy Muara Laboh 270 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

PP No Type Abundance IUCN CITES Ket 7/1999

52 Scleria sumatrensis +++ - - -

53 Sida acuta +++ - - -

54 Solanum melongena. + - - -

55 Solanum torvum + - - -

56 Spilanthes acmella ++ - - -

57 Stachytarpheta +++ - - -

jamaicensis

58 Swietenia mahagonia + - - -

59 Tectona grandis + - - -

60 Themeda gigantea + - - -

61 Toonasureni + - - -

62 Vitex pubescens + - - -

63 Zea mays + - - -

Remarks +++ = Many ; ++ = Medium ;

+ = Few

Source: Primary Data 2014

1. Forest

The form of forest vegetation found around WP-ML 06 is an old secondary forest. The group that controls or is dominant in the area is Myrtaceae such as types of

Syzigium sp and the one that is co dominant is Quercus sp

PT Supreme Energy Muara Laboh 271 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

(Fagaceae). Vegetation analysis results may be seen in

Table 0-20 and Table 0-21 below

PT Supreme Energy Muara Laboh 272 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Table 0-20 Results of Analysis of Tree Vegetation Level in the proximity of WP- ML 06, Coordinates

S 01 37 57.8, E 101 08 12.3

No Type Family K KR F FR D DR NP ID

1 Syzygium sp. Myrtaceae 0,029 33,333 0.9 15,789 6,219 18,522 67,645 -0,336

2 Quercus sp. Fagaceae 0,010 11,494 0.8 14,035 4,888 14,557 40,086 -0,269

3 Calophylum inophyllum Clusiaceae 0,007 8,046 0.7 12,281 4,701 14,000 34,326 -0,248

4 Nephelium sp. Sapindaceae 0,005 5,747 0.2 3,509 5,251 15,640 24,896 -0,207

5 Schima wallchii Theaceae 0,004 4,598 0.2 3,509 5,111 15,221 23,327 -0,199

6 Syzygium antisepticum Myrtaceae 0,003 3,448 0.3 5,263 0,869 2,588 11,299 -0,124

7 Alseodaphne sp. Lauraceae 0,003 3,448 0.3 5,263 0,694 2,066 10,777 -0,119

8 Laportea stimulans M Urticaceae 0,002 2,299 0.2 3,509 0,870 2,590 8,398 -0,100

9 Canarium sp. Burseraceae 0,003 3,448 0.1 1,754 0,537 1,599 6,802 -0,086

10 Flacourtia rukam Flacourtiaceae 0,002 2,299 0.2 3,509 0,119 0,356 6,163 -0,080

11 Antidesma sp. Euphorbiaceae 0,002 2,299 0.1 1,754 0,277 0,825 4,878 -0,067

12 Altingia excelsa Altingiaceae 0,001 1,149 0.1 1,754 0,615 1,833 4,737 -0,066

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No Type Family K KR F FR D DR NP ID

13 Litsea sp. Lauraceae 0,001 1,149 0.1 1,754 0,502 1,497 4,400 -0,062

14 Ficus grossularioides Moraceae 0,001 1,149 0.1 1,754 0,483 1,438 4,342 -0,061

Dipterocarpacea

15 Vatica sp. e 0,001 1,149 0.1 1,754 0,356 1,061 3,965 -0,057

16 Ardisia humilis Myrsinaceae 0,001 1,149 0.1 1,754 0,327 0,973 3,877 -0,056

17 sp2 - 0,001 1,149 0.1 1,754 0,272 0,809 3,713 -0,054

18 Cryptocarya sp. Lauraceae 0,001 1,149 0.1 1,754 0,201 0,599 3,502 -0,052

19 Cinnamomum sp. Lauraceae 0,001 1,149 0.1 1,754 0,177 0,526 3,430 -0,051

20 Magnolia blumei Magnoliaceae 0,001 1,149 0.1 1,754 0,154 0,458 3,362 -0,050

21 Polyalthia sp. Annonacae 0,001 1,149 0.1 1,754 0,147 0,439 3,343 -0,050

22 Rhodamnia cinerea Myrtaceae 0,001 1,149 0.1 1,754 0,143 0,426 3,330 -0,050

23 Polygala paniculata Celastraceae 0,001 1,149 0.1 1,754 0,133 0,395 3,299 -0,050

24 Aporosa sp. Euphorbiaceae 0,001 1,149 0.1 1,754 0,127 0,377 3,281 -0,049

25 Palaquium sp. Sapotaceae 0,000 0,000 0.1 1,754 0,077 0,229 1,984 -0,049

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No Type Family K KR F FR D DR NP ID

26 sp1 - 0,001 1,149 0.1 1,754 0,095 0,283 3,187 -0,048

27 Sapium ixiamasense Euphorbiaceae 0,001 1,149 0.1 1,754 0,057 0,169 3,073 -0,047

0,087 100 5.7 100 33,576 100 300 2,735

Source: Primary Data 2014

Remarks K= Density ; KR= Relative Density; F= Frequency; FR= Relative Frequency; D= Dominance; DR=

Relative Dominace; NP= Important Value; ID= Diversity Index

Table 0-21 Analysis Results of Sapling Vegetation Level in the proximity of WP- ML 06,

Coordinates S 01 37 57.8 , E 101 08 12.3,

No Type Family K KR F FR D DR NP ID

1 Flacourtia rukam Flacourtiaceae 0,008 16,667 0,100 14,286 0,158 27,419 58,371 0,319

2 Lasianthus sp. Rubiaceae 0,012 25,000 0,100 14,286 0,109 18,885 58,170 -

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0,318

3 Laportea stimulans Urticaceae 0,012 25,000 0,100 14,286 0,079 13,726 53,012 0,306

4 Canarium sp. Burseraceae 0,004 8,333 0,100 14,286 0,106 18,287 40,906 0,272

5 Calophylum inophyllum Clusiaceae 0,004 8,333 0,100 14,286 0,055 9,589 32,208 0,240

6 Alseodaphne sp. Lauraceae 0,004 8,333 0,100 14,286 0,050 8,698 31,317 0,236

7 Dyospiros sumatrana Ebenaceae 0,004 8,333 0,100 14,286 0,020 3,397 26,017 0,212

100,00 100,00 100,00 300,00

0,048 0 0,700 0 0,578 0 0 1,902

Source: Primary Data 2014

Remarks K= Density; KR= Relative Density; F= Frequency; FR= Relative Frequency; D= Dominance; DR=

Relative Dominace; NP= Important Value; ID= Diversity Index

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3.2.1.2 Fauna

Based on the observations conducted during the environmental monitoring for the 1st period of 2014, eight species of mammals were recorded to be present in the area of activities. Four species were seen directly at the time of observation, one species sound was heard, one species was identified based on the existence of footprints and traces, while the other two species were recorded based on information from the local community. Two species among them were endangered species (Table 0-22).

It is recorded 13 species of birds were found, two species among which were protected, namely Hawk (Streptopelia sp) and

Hornbill (Buceros rhinoceros) (Table 0-23).

Table 0-22 Mammal Species Found at Activity Location

No Local Name Scientific Status Remarks

Name

1 Babi Sus scrofa J

2 Simpai Presbitys L

melalophus

3 Tupai Callosciurus L

notatus

4 Karo Macaca L

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No Local Name Scientific Status Remarks

Name

fascicularis

5 Baruak Macaca sp I

6 Siamang Hylobates D S

syndactylus

7 Kalong Pteropus L

vampyrus

8 Landak Hystrix D I

brachyura

D = Protected; J = Trace; L = Seen; S = Sound; I = Information

Table 0-23 Bird Species Found at Activities Location

No Local Name Scientific Status Remarks

Name

1 Prinjak Prinia

atrogularis

2 Takur Megalaima

australis

3 Bondo Lonchura maja

4 Elang Streptopelia D

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No Local Name Scientific Status Remarks

Name

5 Cucak Pycnonotus

melanicterus

6 Gereja Passer

montanus

7 Bubut Centropus

sinensis

8 Rangkong Buceros D

rhinoceros

9 Merbah Pycnonotus sp

10 Punai Treron sp

11 Julang emas Aceros

undulatus

12 Poksai Garulax sp

13 Alap-alap Microhierax sp

D = Protected

Based on results of a survey done during the ANDAL and RKL-RPL

Addendum document preparation, the species of fauna inventorized are found in Table 0-24 and Table 0-25.

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Table 0-24 Fauna Species Found in the Proximity of WL-09 Location

Governm ent CITES Regulat No. Species Local Name Abundance IUCN Status Source Status ion No. 7/1999 Status 1. Bufo Kodok *** Least - - Direct melanostictus Concern Observation 2. Bufo asper Kodok *** Least - - Direct Concern Observation 3. Fejervarya Katak Sawah *** Least - - Direct cancrifora Concern Observation 4. Eutropis Bengkarung *** - - - Community multifasciata 5. Bronchocella Bunglon/Kal ** - - - Community cristatela alaso 6. Varanus Biawak *** Least Appendix Community salvator Concern II 7. Dendrelaphis Ular Lidi ** - - - Community pictus 8. Xenochrophis Ular Air ** Least - - Community trianguligerus Concern 9. Ptyas korros Ular ** Least - - Community Simancik Concern 10. Ahaetula Ular Pucuk *** - - - Community prasina 11. Boiga Ular Cincin ** - - - Community dendrophila Emas 12. Naja sumatrana Ular Kobra *** Least Appendix - Community Concern II

13. Muntiacus Kijang ** Least - √ Community munctjak Concern 14. Sus scrofa Babi Hutan *** Least - - Community

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Governm ent CITES Regulat No. Species Local Name Abundance IUCN Status Source Status ion No. 7/1999 Status Concern

15. Lutra lutra Berang- ** Near Appendix I √ Community berang Threatened

16. Lutra Berang- ** Endangered Appendix √ Community sumatrana berang II 17. Paradoxurus Musang *** Least Appendix - Community hermaphroditus Concern III 18. Lonchura Burung *** Least - - Direct punctulata Pipit Concern Observation 19. Passer Burung *** Least - - Direct montanus Gereja Concern Observation 20. Ploceus Burung *** Least - - Community philipinus Tampuo Concern 21. Pycnonotus Burung *** Least - - Community goiavier Barabah Concern 22. Collocalia Burung *** Least - - Direct esculenta Layang- Concern Observation layang 23. Spilornis Elang ** Least Appendix - Direct cheela Concern II Observation 24. Treron Punai Besar *** Least - - Community capellei Concern 25. Treron vernans Punai *** Least - - Community Gading Concern 26. Motacilla Kicuit Batu *** Least - - Community cinerea Concern 27. Arachnotera Pijantung *** - - - Community robusta Besar 28. Otus umbra Burung ** Least - - Community

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Governm ent CITES Regulat No. Species Local Name Abundance IUCN Status Source Status ion No. 7/1999 Status Hantu Concern 29. Ketupa ketupu Burung ** Least - - Community Hantu Concern 30. Egretta alba Burung *** Least - - Community Kuntul Concern 31. Coturnix Burung *** Least - - Community chinensis Puyuh Batu Concern Source: Primary Data 2014

Table 0-25 Fauna Species Found in the Proximity of WL-06 Location

Government

IUCN CITES Regulation No. Species Local Name Abundance Source Status Status No. 7/1999

Status

1. Megophrys Katak Bertanduk ** Least - - Community

nasuta Concern

2. Mychrohyla Katak Serasah ** - - - Community

acatina

2. Leptobrachium Katak Serasah ** Least - - Community

abboti Concern

3. Eutropis Bengkarung *** - - - Community

multifasciata

4. Bronchocella Bunglon/Kalalaso ** - - - Community

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Government

IUCN CITES Regulation No. Species Local Name Abundance Source Status Status No. 7/1999

Status

cristatela

5. Presbytis Simpai *** Endangered - - Direct

melalophos Observation

6. Symphalangus Siamang *** Endangered Appendix - Direct

syndactylus I Observation

7. Macaca Kera ** Least - - Community

fascicularis Concern

8. Macaca Beruk ** Vulnerable - - Community

nemestrina

9. Hylobates Ungko ** Endangered Appendix √ Community agilis I

10. Draco Cicak Terbang ** - - - Community

sumatrana

11. Naja Ular Kobra *** Least - - Community

sumatrana Concern

12. Ahaetula Ular Pucuk *** - - - Community

prasina

13. Boiga Ular Cincin Emas *** - - - Community

dendrophila

14. Bungarus Ular Pamati Ikua *** Least - - Community

flaviceps Concern

15. Tupaia minor Tupai *** Least - - Community

Concern

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Government

IUCN CITES Regulation No. Species Local Name Abundance Source Status Status No. 7/1999

Status

16. Paradoxurus Musang *** Least Appendix - Community

hermaphroditu Concern III

17. Cervus Rusa ** - Appendix √ Community unicolor I

18. Muntiacus Kijang *** Least - √ Community muntjak Concern

19. Sus scrofa Babi Hutan *** Least - - Community

Concern

20. Hystrix Landak * Least - √ Community brachyura Concern

21. Panthera Harimau Sumatera ** Endangered Appendix √ Community tigris I

sumatrae

22. Felis Macan Dahan ** - Appendix √ Community bengalensis II

23. Lutra lutra Berang-berang * Near Appendix √ Community Threatened I

24. Helarctos Beruang Madu ** Vulnerable Appendix √ Community malayanus I

25. Buceros Rangkong Badak * Near Appendix √ Community rhinoceros Threatened II

26. Buceros Rangkong Papan * Near Appendix √ Community

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Government

IUCN CITES Regulation No. Species Local Name Abundance Source Status Status No. 7/1999

Status

bicornis Threatened I

27. Lonchura Burung Pipit *** Least - - Community

punctulata Concern

28. Lonchura Burung Bondol *** Least - - Community

striata Tunggir Putih Concern

29. Lonchura maja Bondol Haji *** Least - - Community

Concern

30. Megalaima Burung Takur *** - - - Community

australis Tenggeret

31. Psilopogon Burung Takur Api *** - - Community

pyrolophus / Loayam

32. Treron Punai Gading *** Least - Community

vernans Concern

33. Treron Punai Besar *** Least - Community

capellei Concern

34. Dicaeum agile Cabai Gesit ** Least - Community

Concern

35. Dicaeum Cabai Tunggir ** Near - Community

everetti Coklat Threatened

36. Dicaeum Cabai Rimba ** Least - Community

chrysorrheum Concern

37. Arachnotera Pijantung Besar *** - - √ Community robusta

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Government

IUCN CITES Regulation No. Species Local Name Abundance Source Status Status No. 7/1999

Status

38. Aethopyga Burung Madu Ekor ** - - √ Community temminckii Merah

39. Reindwardtipi Pelatuk Kundang ** - - - Community

cus validus

40. Dinopium Pelatuk Raffles ** Near - - Community

rafflesi Threatened

41. Orthotomus Cinenen Kelabu * Least - - Community

ruficeps Concern

42. Pycnonotus Kutilang ** Least - - Community

aurigaster Concern

43. Dicrurus Srigunting Bukit ** Least - - Community

remifer Concern

44. Loriculus Serindit Melayu ** Least Appendix - Community

galgulus Concern II

45. Haliastur Elang Bondol ** Least Appendix - Community

indus Concern II

46. Spilornis Elang Ular Bido ** Least Appendix - Community

cheela Concern II

47. Motacilla Kicuit Batu *** Least - - Community

cinerea Concern

48. Lanius schach Bentet Kelabu *** Least - - Community

Concern

49. Rhipidura Kipasan Gunung *** Least - - Community

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Government

IUCN CITES Regulation No. Species Local Name Abundance Source Status Status No. 7/1999

Status

albicollis Concern

50. Rhipidura Kipasan Mutiara *** Least - - Community

perlata Concern

51. Rhipidura Kipasan Belang *** Least - - Community

javanica Concern

52. Dendrocitta Tangkar Uli ** Least - - Community

occipitalis Sumatera Concern

Source: Primary Data 2014

Remarks:

*** = Many

** = Medium

* = Few

The results of the above analysis indicates that the environment

quality for flora and fauna are in good condition (scale 4).

Based on the results of this analysis it is known that there has

been no significant change of environmental quality in the

surrounding area of the Activities Location for PLTP Muara Laboh

at Solok Selatan District.

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3.2.2 Aquatic Biota

Observation of aquatic biota was carried out at the same location as surface water sample-taking.

3.2.2.1 Plankton

Phytoplanton is the main producer and basis of the food chain, while the structure and abundance of zooplankton will be determined from the abundance of the phytoplanton itself.

Plankton analysis results at the time of environmental monitoring in period I of 2014, is presented in Table 0-26.

Table 0-26 Plankton Community in the Proximity of Activity

Location

Sample-Taking Location

Sungai Liki Bangko Bangko

No. Family/Species Upstream Downstream Keruh Jernih

K KR K KR K KR K KR

(ind/l) (%) (ind/l) (%) (ind/l) (%) (ind/l) (%)

A. PHYTOPLANKTON

A. 1.

Bacillariophyceae

1 Achnanthes sp 1.33 0.84 6 2.52

2 Achnanthes 0.67 0.28

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Sample-Taking Location

Sungai Liki Bangko Bangko

No. Family/Species Upstream Downstream Keruh Jernih

K KR K KR K KR K KR

(ind/l) (%) (ind/l) (%) (ind/l) (%) (ind/l) (%)

crenulara

3 Amphora ovalis 1.33 0.56

4 Cymbella tumida 0.67 0.42

Cymbella 5 2.67 1.67 turgidulla

Fragillaria 6 47.3 29.7 45.3 19.1 54 46 10.7 6.99 capucina

Gomphonema 7 0.67 0.42 minutum

Gyrosigma 8 0.7 0.57 scalproides

9 Melosira varians 0.67 0.42 4 3.41

10 Navicula bacillum 4 2.62

11 Navicula minima 4 2.51 18 7.56 4.7 3.98 2 1.31

12 Navidula sp 2 1.31

Nitzschia 13 2 1.26 0.67 0.28 2.7 2.27 2 1.31 frustulum

Nitzschia 14 0.67 0.44 linearis?

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Sample-Taking Location

Sungai Liki Bangko Bangko

No. Family/Species Upstream Downstream Keruh Jernih

K KR K KR K KR K KR

(ind/l) (%) (ind/l) (%) (ind/l) (%) (ind/l) (%)

Pinnularia 15 0.67 0.44 braunii

Pinnularia 16 0.67 0.28 microstaurons

17 Stauroneis anceps 0.67 0.44

Surirella 18 4.67 2.93 0.67 0.28 2.7 2.27 84 55 linearis

19 Surirella ovalis 2 1.26 2 1.31

20 Synedra ulna 38.7 24.3 75.3 31.7 8.7 7.39 5.33 3.49

A.2.

Chlorophyceae

Closterium 21 0.67 0.44 colasporium

Closterium 22 0.67 0.28 validum

23 Cylendrocapsa sp 1.33 0.87

24 Euastrum ansatum 0.67 0.44

Gaminella 25 1.33 0.84 2 1.7 0.67 0.44 mutabilis

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Sample-Taking Location

Sungai Liki Bangko Bangko

No. Family/Species Upstream Downstream Keruh Jernih

K KR K KR K KR K KR

(ind/l) (%) (ind/l) (%) (ind/l) (%) (ind/l) (%)

26 Microsphora sp 1.3 1.14 0.67 0.44

Oedogonium 27 0.7 0.57 microgonium

28 Oedogonium sp 0.67 0.42 1.3 1.14

29 Stigeoclanium sp 0.67 0.42 1.33 0.56

30 Trentepohlia sp 5.33 3.35 3.33 1.4 6 5.11 2 1.31

Ulothrix 31 1.33 0.87 cylendricum

A.3. Cyanophyceae

33 Calothrix fusus 10.7 6.69 3.3 2.84

34 Calothrix sp 4 1.68 2 1.7

Cylendrospermus 35 4.67 3.06 sp

Dactylococcopsis 36 2.67 1.67 2 0.84 2 1.7 sp

37 Hapalosiphon sp 0.67 0.42

38 Lyngbya major 4.67 2.93 1.33 0.56 2.7 2.27 1.33 0.87

Oscillatoria 39 4 2.51 12.7 5.32 6 5.11 4 2.62 angutissima

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Sample-Taking Location

Sungai Liki Bangko Bangko

No. Family/Species Upstream Downstream Keruh Jernih

K KR K KR K KR K KR

(ind/l) (%) (ind/l) (%) (ind/l) (%) (ind/l) (%)

Oscillatoria 40 2.67 1.12 1.3 1.14 2.67 1.75 Formosa

Oscillatoria 41 1.33 0.56 tenue

Phormidium 42 0.67 0.44 ambiguum

43 Phormidium tenue 0.67 0.28 1.33 0.87

Scytonema 44 0.67 0.42 0.7 0.57 0.67 0.44 archangelii

45 Scyzothrix sp 0.67 0.42

46 Spirulina mojor 2 0.84 0.67 0.44

Spirulina 47 6.67 2.8 subsalsa

A. 4.

Euglenophyceae

Trachelomonas 48 2.67 1.67 1.33 0.56 1.3 1.14 0.67 0.44 volvocina

49 Trachelomonas sp 0.67 0.28

B. ZOOPLANCTON

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Sample-Taking Location

Sungai Liki Bangko Bangko

No. Family/Species Upstream Downstream Keruh Jernih

K KR K KR K KR K KR

(ind/l) (%) (ind/l) (%) (ind/l) (%) (ind/l) (%)

B. 1. Protozoa

50 Arcella sp 2.67 1.67 22 9.24 1.3 1.14 8 5.24

51 Centrophyxis sp 1.33 0.56

52 Difflugia sp 11.3 7.11 21.3 8.96 0.7 0.57 1.33 0.87

53 Euglypha sp 4.67 2.93 2 0.84 6.7 5.68 3.33 2.18

54 Nebelia sp 0.67 0.28 0.7 0.57 0.67 0.44

55 Vorticella sp 0.67 0.42

B. 2. Rotifera

Notholca 56 0.67 0.42 1.33 0.56 1.33 0.87 acuminate

Taxa Amount 28 29 24 32

Total Density (ind/l) 159.33 238.00 117.33 152.67

Diversity Index (H’= 2.38 2.29 2.23 2.06 - ∑ pi ln pi) Source: Biology Laboratory Analysis Results, FMIPA Unand

3.2.2.2 Bentos

While analysis results of environmental monitoring within the

1st period of 2014 is presented in Table 0-27.

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Table 0-27 River Benthos Community in around Activity Location

Sample-Taking Location

Group / Sungai Liki Bangko Bangko Keruh No Bentos Animal Upstream Downstream Jernih

Species K KR K KR K KR K KR

(ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%)

INSECTA

O. Coleoptera

Macrorynchus

1 sp. 3.70 1.89 3.70 4.00

11.3

2 Promoresia sp. 14.81 7.02 22.22 2 3.70 4.00 3.70 3.57

Psephenoides

3 sp. 11.11 5.26 14.81 7.55 3.70 4.00

10.7

4 Stenelmis sp. 11.11 1

O. Diptera

5 Anttocha sp. 3.70 1.75 11.11 5.66 7.41 8.00 7.41 7.14

12.2

6 Ixonanthes sp 25.93 8 18.52 9.43

O. Odonata

Asiagomphus

7 sp. 14.81 7.02 11.11 5.66

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Sample-Taking Location

Group / Sungai Liki Bangko Bangko Keruh No Bentos Animal Upstream Downstream Jernih

Species K KR K KR K KR K KR

(ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%)

Ephemeroptera

Centroptilum 16.0

8 sp. 14.81 7.02 14.81 0

O. Lepidoptera

9 Eoophyla sp. 3.70 1.75 18.52 9.43

O. Megaloptera

10 Chaulodes sp. 3.70 1.75 7.41 3.77 3.70 3.57

Corydalidae sp 10.7

11 1 3.70 1.89 11.11 1

O. Plecoptera

Chloroperla

12 sp. 7.41 3.51 3.70 1.89 3.70 4.00 3.70 3.57

35.7

13 Neoperla sp. 3.70 1.75 37.04 1

O. Trichoptera

Cheumatopsyche

14 sp. 3.70 1.75 7.41 3.77 7.41 8.00 3.70 3.57

15 Glossosoma sp. 70.37 33.3 51.85 26.4

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Sample-Taking Location

Group / Sungai Liki Bangko Bangko Keruh No Bentos Animal Upstream Downstream Jernih

Species K KR K KR K KR K KR

(ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%)

3 2

Hydropsyche

16 bryanthi 3.70 1.75 7.41 3.77

Hydropsyche sp 32.0 14.2

17 . 29.63 0 14.81 9

Hydroptilla

18 sp. 7.41 8.00

19 Leptoceridae 3.70 4.00

Philopotamus

20 sp. 3.70 3.57

21 Psychomya sp. 7.41 3.51 14.81 7.55

O. Coleoptera

10.5

22 Promoresia 22.22 3

OLIGOCHAETA

23 Tubifex sp. 3.70 4.00 3.70 3.57

TURBELLARIA

24 Planaria sp. 3.70 4.00

Taxa Amount 15 14 12 11

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Sample-Taking Location

Group / Sungai Liki Bangko Bangko Keruh No Bentos Animal Upstream Downstream Jernih

Species K KR K KR K KR K KR

(ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%) (ind/m 2) (%)

Total Density

(ind/m2) 211.11 196.30 92.59 103.70

Diversity Index

- 2.24 2.19 2.17 (H’= ∑ pi ln 2.03 pi)

Source: Biology Laboratory Analysis Results, FMIPA Unand

Based on the abovementioned description, it is known that the environmental quality for aquatic biota are in good condition

(scale 4) and the impact is significant (scale 4).

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3.3 SOCIO-ECONOMIC CULTURE AND PUBLIC HEALTH

3.3.1 Socio-economic culture

3.3.1.1 Population

2. Total Population

The population of Solok Selatan District in 2013 is projected to be 153,943 people, comprising 77,525 males and 76,418 females.

Compared to that of the previous year, the population has increased by 5,506 people, or by 3.70 percent. Based on the age structure of the population, the Solok Selatan District is categorized as having young population which is approximately

32.55 percent.

The population density of Solok Selatan District in 2013 is

46.01 people per km2 on average. The highest population density is in Sangir Sub-district, with an average of 62.95 people/km2, while the lowest is in Sangir Balai Janggo Sub-district with

24.06 people/km2.

Based on the data from Solok Selatan District in Figures in

2014, the population of Alam Pauh Duo District in 2013 was

15,028 people with a population density of 43,17 people/km2; while Sangir Sub-district has a population of 39,849 people with a density of 62,95 people/km2. A complete population profile of

Solok Selatan District is presented in Table 0-28.

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Table 0-28 Total Population and Distribution, Area Size and

Population Density in Solok Selatan District by Sub-

district 2013

Population Population Area Size Sub-district number density

people km2 people/km2

Sangir 39,849 632.99 62.95

Sangir Jujuan 12,421 278.06 44.67

Sangir Balai Janggo 16,528 686.94 24.06

Sangir Batang Hari 16,540 280.01 59.07

Sungai Pagu 30,266 596.00 50.95

Pauh Duo 15,028 348.10 43.17

Koto Parik Gadang 23,211 524.10 44.29 Diateh

2013 153,943 3,345.20 44.01 Total 2012 148,437 3,346.20 44.36

Source: Solok Selatan District in figures, 2014

Table 0-29 indicates that the population of Nagari Alam Pauh Duo is 7,867 people. This table also indicates that Nagari Alam Pauh

Duo consists of eight sub-villages (jorong). Resprectively from the largest to the smallest, the eight jorong are as follows:

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Pekonina (1,475 people), Pakan Salasa (1,147 people), Durian

Tigo Capang (1,056 people), Kampung Baru-Pekonina (1,016 people), Simancuang (891 people), Taratak Tinggi (813 people),

Ampalu (807 people), and Jorong Sapan Sari-Pekonina (662 people).

Table 0-29 Total Population, Total Number of Families (KK) and

Average [Number of People within each Family]

According to Jorong in Nagari Alam Pauh Duo, 2011

Average Total Number of Total Number of Jorong People in Population Familires each (KK) Family

Pakan Salasa 1,147 312 4

Durian Tigo Capang 1,056 226 5

Ampalu 807 166 5

Pekonina 1,475 389 4

Sapan Sari-Pekonina 662 175 4

Kampung Baru-Pekonina 1,016 246 4

Taratak Tinggi-Pekonina 813 215 4

Simancuang 891 203 4

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Average Total Number of Total Number of Jorong People in Population Familires each (KK) Family

Total 7,867 1932 4

Source: Nagari Alam Pauh Duo Profile, 2012

Table 0-29 also indicates the number of Heads of Households

(Kepala Keluarga/KK) and the average number of family members per household/ family in each jorong (sub-village). The overall number of Households (Kepala Keluarga / KK) in Nagari Alam Pauh

Duo are 1,932 households. The jorong which has the highest number of Households (Kepala Keluarga / KK) is Pekonina (389 families) and the smallest number of households is in Jorong

Ampalu (166 families). The average number of family members per household is 4 persons.

Based on the figure of family size, the natural increase in population in the actiivity site is categorized as slightly higher compared to that of a stable population. The average number of households indicates that labor force growth in the study area was slightly higher than the ideal condition.

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3. Population Structure

Several primary issues regarding population structure at the study area. First, related to the birth, there is an increase in the birth rate. As presented in Table 0-30 there is an indication that the proportion of Solok Selatan District citizens aged <5 years (balita - bawah lima tahun or under 5 years old) is greater than those between 5 - 9 years, namely

17,970 people compared to 16,588 people.

Table 0-30 Population Distribution by Age Group and Gender in

Solok Selatan District, 2013

Age Group Male Female Total

0 - 4 9,041 8,929 17,970

5 - 9 8,145 8,173 16,588

10 - 14 7,884 7,667 15,551

15 - 19 6,786 6,324 13,110

20 – 24 6,328 6,118 12,446 25 - 29 6,836 6,922 13,758

30 - 34 6,124 6,210 12,334

35 - 39 5,853 5,627 11,480

40 - 44 4,927 4,681 9,608

45 - 49 3,997 4,121 8,118

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Age Group Male Female Total

50 - 54 3,400 3,429 6,829

55 - 59 2,805 2,714 5,519

60 - 64 2,095 1,880 3,975

65 + 3,034 3,623 6,657

2013 77,525 76,418 153,943 Total 2012 74,662 73,775 148,437

Source: Solok Selatan District in Figures, 2014

Based on the total population according to gender and gender ratio, Sangi Sub-district has the highest gender ratio, which is

102.92, and Sungai Pagu Sub-district has the lowest gender ratio at 94.27. The complete population data according to gender and gender ratio may be seen in Table 0-31.

Table 0-31 Total Population According to Gender and Sub-district

in Solok Selatan District, 2013

Total Population Gender Sub-district Male Female Ratio

Sangir 20,211 19,638 102.92

Sangir Jujuan 6,251 6,170 101.30

Sangir Balai Janggo 8,850 7,678 115.25

Sangir Batang Hari 8,355 8,185 102.09

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Total Population Gender Sub-district Male Female Ratio

Sungai Pagu 14,735 15,631 94.27

Pauh Duo 7,472 7,556 98.88

Koto Parik Gadang 11,651 11,560 100.79 Diateh

2013 77,525 76,418 101.45 Total 2012 74,662 73,775 101.20

Source: Solok Selatan District in Figures, 2013

4. Manpower

The total population under the workers category or population aged 15 years old and above in the study area is 64.1% at Pauh

Duo Sub-district, and overall 66.2% in Solok Selatan District.

However, the young population (0-14 years old) is greater in the

Pauh Duo Sub-district compared to the Solok Selatan District.

This means that labor force growth in the future will be higher in the study area of Solok Selatan as a whole.

Comparisons between non-productive age population to productive age population resulted in a dependency ratio, namely between those of young age and the elderly. Table 0-32 shows the age dependency ratio in Pauh Duo Sub-district at 0.67 or as many as

67 people of non-productive age per 100 productive age

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District is 62 people per 100 productive population.

The study area or Pauh Duo Sub-district has a dependency ratio higher compared to Solok Selatan District, both for young age dependency ratio and elderly people dependency ratio.

Table 0-32 Solok Selatan Population aged 15 years and above

According to the Type of Activity and Gender,

2011

Type of Activities Male Female Total

Labor Force 40,684 25,058 65,742

Employed 38,729 22,824 61,553

Unemployed 1,955 2,234 4,189

Non-Labor Force 7,201 24,721 31,922

School 3,728 5.615 9,343

Take care of household 523 16,479 17,002

Others 2,950 2,627 5,571

Total 47,885 49,779 97,664

Labor Force Participation

Level (Tingkat Partisipasi 85.0 50.3 67.3

Angkatan Kerja / TPAK)

Open Unemployment Level 4.8 8.9 6.4

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Source: Data Processing Results of National Labour Force Survey

(Survei Angkatan Kerja Nasional - SAKERNAS) in Solok Selatan

District in figures, 2012

Not all labor (productive age population) fall into the category of "labor force", namely the active population work and looking for work. The reason the working age population is not active in the labor market is because they have to go to school, taking care of the family and for other reasons (Table 0-33). In overall, the labour force participation rate (Tingkat

Partisipasi Angkatan Kerja/TPAK) in Services and Labor Force

Participation in Solok Selatan District is approximately 85%.

There is a significant difference between the male and female labour force participation rate (Tingkat Partisipasi Angkatan

Kerja / TPAK), which are 85.0% male compared to 50.3% female.

This significant difference is due to the nature and time allocation of females for non-productive activities (non-market activities), such as taking care of the husband's needs, taking care of children, housekeeping, shopping to the market, preparing food for the family, etc. (Becker, 1966).

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Table 0-33 Population Distribution According to the Source of

Income in Nagari Alam Pauh Duo, 2011

Total Source of Income Persons %

Labor 1,325 21.4

Farmer 2,972 48.0

Trader 607 9.8

Civil Servant 57 0.9

Military/Police 12 0.2

Driver 40 0.6

Motorcycle Cab Driver 32 0.5

Contractor 10 0.2

Private sector 1,142 18.4

Total 6,197 100.0

Source: Nagari Alam Pauh Duo Profile, 2011

The workforce that do not work is called as open unemployment.

The level of open unemployment in the study area is categorized as low, namely 6.4%. The level of open unemployment for females is generally larger than males, and in this study it is 8.9% compared to 4.8% (Table 0-33). While based on the Nagari Alam

Pauh Duo Profile of 2011, the total unemployment in this Nagari

(Village) is 354 people or 11%.

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Based on the field studies by in-depth interviews it was revealed that there is a disguised unemployment rate in the study area. The workforce that belong to this disguised unemployment category are those who work less than 35 hours/week. The number of Labor that fall in the category of underemployment or disguisedunemployment is very large in the study area. The explanation for this situation is because of the seasonality of the rice business, and the ownership of relatively small plots.

Most of the farmers that own plots say that their land is less than one (1) hectare, whereas one (1) hectare is equivalent to

25 patok (stakes). There is a large number of farmers who only have small plots or who does not have any land. This can be seen in Table 0-34 where the number of farmers in Nagari Alam Pauh

Duo are 2,972 people. According to Nagari Alam Pauh Duo 2011 data profile, these farmers cultivate 1,600 Ha of irrigated rice fields. Table 0-33 also depicts that 21.4% or 1,325 people depend on being labor as their livelihood. Labor in the study area are mostly farm labor that work on paddy fields as labor who work for rice farmers and some of them work for plantation companies.

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Table 0-34 Non-Agricultural Business in Nagari Alam Pauh Duo

Type of Business Total

Embroidery 7

Brick production 14

Snacks business 13

Computer rental business 3

Computer lessons business 3

Computer service business 4

Tailor 9

Vehicle workshop 12

Mobile phone counter 22

Photocopy business 3

Total 90

Source: Nagari Alam Pauh Duo Profile, 2011

3.3.1.2 Employment Opportunities

With respect to the abovementioned considerable high level of unemployment and disguised unemployment, it can be concluded that the environmental baseline in relation to the employment opportunities parameters are in bad condition (scale 2) and the impact is significant (scale 5).

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3.3.1.3 Business Opportunities

Oshima (1983) argued that the transformation of the rural economy in Japan and other East Asian countries were characterized by the growth of employment outside the agricultural sector (off-farming employment) and non- agricultural employment (non-farming employment). The first one are farmers who also own a business or work in non-farm enterprises, and the latter are people whose overall income is derived from non-agricultural businesses.

Table 0-34 also indicates that the source of the dominant livelihood is farming, namely by 48.0%. This table also shows that the number of people who work outside the agricultural sector is also quite large, namely 41.6%. Shand (1983) reported that the source of livelihoods outside the agricultural sector after the Second World War contributed greatly to the income of farmers in countries like Japan, South Korea and Taiwan. Since the 1970s, livelihoods outside the agricultural sector also grew rapidly in Thailand, Malaysia and in the rural areas of Java island.

In the Nagari Alam Pauh Duo area, non-agricultural sector livelihoods are dominated by trade (9.8%) and self-employment

(18.4%). Shand (1983) noted that growth of the non-agricultural

PT Supreme Energy Muara Laboh 310 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW sector in rural areas is closely associated with the strategic location of a jorong (sub-village) and availability of better infrastructure. Therefore it cannot be denied that the non- agricultural sector in the study area is concentrated on only a few locations or on certain jorong, particularly Pekan Salasa and the jorong along the Muara Labuh and Padang Aro arterial roads. In field studies, it is also observed that the sources of non-agricultural livelihoods are very rare in major part of

Jorong Nagari Alam Pauh Duo. Patterns of business opportunities in these jorong are very limited due to infrastructure and accessibility constraints as well as traffic density.

Based on the abovementioned considerations, it can be concluded that the environmental baseline related to business opportunity parameters in the study area is in very bad condition (scale 1) and the impact is categorized as more significant (scale 5).

3.3.1.4 Community Income

Nagari Alam Pauh Duo, which is located in Solok Selatan

District, has abundant natural resources that include geothermal energy, iron ore, forest and hot spring tourism potential, etc.

But a large number of these natural resources have not been managed due to lack of capital, expertise and technology.

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The efforts to manage the natural resources in this area is performed by the community and it includes rice crops, horticultural crops and fruits, community plantation, medicinal plants, livestock and fishery. Such farming systems are generally aimed at satisfying subsistence needs.

Commercialization of agricultural products although present, are still to meet the needs of everyday life. The farming business strategy implemented by the community is in general to meet basic needs. Community savings activities performed usually in the form of community livestock farming, such as goats, cows and buffaloes.

Rice crop farming business is a dominant business in the study area (48%). As a source of income, the rice crop is inadequate because the average land ownership is very low, around 15 stakes

(patok) or 0.6 hectares per farmer. Therefore, they need to get additional income from the fields of agricultural and non- agricultural or from becoming labor whether inside or outside their own region.

With regard to the level of wages, based on in-depth interviews with key informants it was revealed that the level of wages in the study area is very low, which is at around Rp 6,000 to 8,000 per hour, or about Rp 50,000 per day for agricultural labor, Rp

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80,000 per day for workman’s wage and Rp 50,000 to Rp 60,000 per day for assistant of workman. Meanwhile, wages in plantation companies around the planned activity area is Rp 25,000 per half day of work for female workers and the labor contract system is applied for male workers. Meanwhile, the low wage rates implicitly reflect the condition of labor surplus or the lack of employment opportunities in the study area.

Based on the analysis of factors that affect people's income, it can be concluded that the the quality of environmental baseline in relation to business opportunity parameters in the study area is in bad condition (scale 2) and the impact is classified as very significant (scale of 5).

3.3.2 Socio-cultural

3.3.2.1 Values and Social Norms

The plan for additional production wells for the 250 MW

Geothermal Power Plant (PLTP) by SEML is still in in the Liki

Pinangawan mining work area, which is located in Nagari Pauh

Duo, Pauh Duo Sub-district, Solok Selatan District, which has a

Minangkabau customary system. The absence of geothermal development activities in over a year is due to the study for additional production wells in order to obtain maximum geothermal steam which is in accordance with the planned target.

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The PLTP area of SEML is a former tea plantation owned by the

Dutch, whose workers are mainly Javanese that have lived in harmony with the local community for a long time. Based on the narrative of the elders, the name Nagari Alam Pauh Duo is derived from Tambo Adat Pauh Duo, when three ancestors (Ninik) who came from Egypt arrived with their entourage, namely:

 Inyiak Samiak (Dt. Samad Dirajo)

 Inyiak Samilu Aia (Dt. Rajo Lelo)

 Inyiak Sikok Sutan Majo Lelo

Inyiak Sikok Sutan Majo Lelo then moved to Camin Talao (Nagari

Lubuk Gadang and the surrounding areas). In this nagari

(autonomous village) both Ninik made a nagari by fishing, training, foraging the woods, celebrated, made rice paddy terraces, and various types of objects. They made a nagari, and built a Koto (fortress town) which was then called "Koto Tuo", currently part of nagari Pauh Duo Nan Batigo, while the word

Alam means they belong to one traditional custom area. This is the oldest nagari (autonomous village) in Sungai Pagu which was built by Inyiak Samiak, Inyiak Samilu Aia and their entourage.

Based on the history, the social development of nagari Pauh Duo, was marked with the arrival of Ninik Mamak Nan Salapan from

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Pagaruyung, this group made the settlement in Banuaran (now part of nagari Kapau Alam Pauh Duo) who was led by Inyiak Nan

Salapan, agree to build a village, named Alam Pauh Duo. Nagari

Alam Pauh Duo is a privileged area of Alam Surambi Sungai Pagu, which exclusively has its own area and leader called Rajo

Cancang Latih.

Nagari Alam Pauh Duo is an area as a result of the development of Sungai Pagu Sub-district in 2002, which had 14 jorong (sub- village) with the following nagari administrative boundaries:

 North : Nagari Koto Baru

 South : Nagari Lubuk Gadang

 West : Pesisir Selatan District

 East : Sawahlunto Sijunjung District

Social conditions and customary traditions of the community surrounding the activity location of the additional production wells are dominated by Minangkabau and Javanese ethnics, so that the interaction pattern and social relationship that develop are very much based on Minangkabau values. The community structure in the study area is Jorong Kampung Baru, Taratak Tinggi,

Pekonina and Pinang Awan with quite diversified cultures, namely

Minang, Javanese, Batak and Nias. A more dominant culture and

PT Supreme Energy Muara Laboh 315 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW language is Minang, which makes the legitimacy of activities performed in the proximity of the site (including those by non-

Minangkabau community members) always measured by the values of the Minangkabau culture. The social life of the nagari Pauh Nan

Duo is influenced by the Minang culture that has the communal land as the place or land for their anak cucu kemenakan

(children, grandchildren, nephews and nieces) to make a living.

The existence of communal land is used for community welfare and its presence is maintained as the identity of the clan/ethnic.

The additional production wells for the geothermal power plant located in Nagari Alam Pauh Duo within the Pauh Duo Sub-district has an area of 348.1 km² with a population of 15,028 people or

3,536 households. Based on West Sumatra Provincial Government

Regulation, the lowest government administration system is the nagari (village) as an overall customary administration system.

Furthermore, the Pauh Duo Sub-district has 4 nagari (village) namely Nagari Alam Pauh Duo, Pauh Duo Nan Batigo, Luak Kapau

Alam Pauh Duo dan Nagari Kapau Alam Pauh Duo. In the meantime,

Nagari in the study area are Nagari Alam Pauh Duo and Nagari

Pauh Duo Nan Batigo. The following table indicates the composition of the population based on nagari in the Pauh Duo

Sub-district, Solok Selatan District.

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Table 0-35 Total Population based on Gender, Number of Households

per Nagari in Pauh Duo Sub-district, 2013

Size Total population

(k Density No Nagari m² Male Female Total Household Pop./km²

)

1. Alam Pauh Duo 99.01 3,427 3,407 6,834 1,611 69.15

2 Pauh Duo Nan 66.70 1,147 1,263 2,410 562 35.80

Batigo

3 Luak Kapau 90.81 1,652 1,645 3,297 777 36.36

Alam Pauh

Duo

4 Kapau Alam 91.58 1,246 1,241 2,487 586 27.21

Pauh Duo

Total 348.10 7,472 7,556 15,028 3,536 43.17

Source: Patah Duo Sub-district in Figures, 2014

The abovementioned data shows that the largest population is in the nagari Alam Pauh Duo as study area for the addition of production wells for PLTP Muaro Labuh with a capacity of 250 MW.

The total population in Nagari Alam Pauh Duo is 6,834 people or

1,611 households with 3,427 males and 3,407 females. The

PT Supreme Energy Muara Laboh 317 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW smallest population in Nagari Pauh Nan Batigo is 2,410 people with 562 households consisting of 1,147 males and 1,263 females.

The largest area in the study area is Nagari Alam Pauh Duo that is 99.02 km² of consisting of 4 nagari (village) that are in the

Pauh Duo Sub-district, the highest population density is also in

Nagari Alam Pauh Duo with 68.15 people / km², while the smallest nagari area is Pauh Duo Nan Batigo which is 66.70 km², located in Pauh Duo Sub-district, Solok Selatan District.

The community kinship system in the study area is established through matrimony, by the area of origin and descendants, in the form of an ethnicity system. In general, the dominant ethnic group in the study area is Minang, which is approximately 90%, while Javanese, another ethnicity which is the second largest following the Minang, have settled in the area hundreds of years ago since the Dutch colonial period as tea plantation workers.

Most Javanese are in Jorong Pekonina and Pinang Awan. They have assimilated through social interactions by marriages and working relationships with the local community. Other ethnic groups present in the study area are Sundanese, Batak and Nias which are very few.

The social interaction and kinship among communities in the study area are based on origins and marriages between members of the ethnic groups present. Furthermore, ethnic groups found in

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Nagari Alam Pauh Duo and Nagari Pauh Duo Nan Batigo, as the activity sites for the PLTP construction are Melayu, Koto

Kaciak, Sikumbang, Tigo lareh, Bariang Kampai, Panai, Durian,

Tanjung, Chaniago, Piliang and ethnic groups outside of Minang such as Javanese, Batak and Nias that have co-existed and lived harmoniously for a long time.

Social life in Nagari Nagari Alam Pauh Duo and Duo Nan Batigo

Pauh interact with each other both socioculturally as well as a customary law community. The customary law community is a law society, which groups of people who for generations have lived in a particular geographical area because of the bond related to ancestral origins, the existence of a strong relationship with the environment, as well as a value system that determine the economic, political, social and legal orderliness. Results of field surveys indicated that the community in the study area relatively lived long in the area, in general they lived more than 10 years, even one generation.

Societal kinship in the study area is still quite good, despite the fact people are from different regions and ethnic groups.

The societal habit pattern in nagari Alam Pauh Duo that still continues is collaboration (working together or gotong royong) in building the village/jorong and deliberations in resolving issues. Collaboration can be seen in construction activities

PT Supreme Energy Muara Laboh 319 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW for roads, villages / sub-village markets, roads, and repairs to mosques/mushalla (small mosque). Social conflicts between ethnic groups in the study area seldom occur; this is due to mutual understanding of traditional customs and culture. The population concentration of each region has been formed for a long time between the Javanese and non-Javanese, and acculturation of two different cultures through matrimony. Acculturation of social processes occurs when a group of people with particular cultural norms are confronted with elements of a foreign culture, to such an extent that elements of the foreign culture was gradually accepted and processed into its own culture without losing the personality of the original culture itself. Further, social conflicts in the study area of the planned additional production wells for the PLTP in nagari Alam Pauh Duo seldom occur. The figure below indicates social conditions of communities in the study area of the planned additional production wells for the

PLTP in nagari Alam Pauh Duo.

PT Supreme Energy Muara Laboh 320 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Tidak/belum pernah 25 (62,5%)

Sangat jarang 9 (22,5%)

Kadang-Kadang 2 (5%)

Sering 4 (10%)

0 5 10 15 20 25

Figure 0-6 Respondents Opinion on the Occurrence of Social ’ Conflicts

The above Figure indicates that the respondents are of the opinion that social conflicts or disagreement in the community are 25 people (62.5%) has never/not yet occurred, despite their coming from various ethnic groups because they can coexist harmoniously. There are 9 respondents (22.5%) out of the total

40 respondents interviewed who are of the opinion that social conflicts are very rare amongst the community; and conflicts occur between people with the proponent about land issues, especially problems with the community’s paddy water. There are 4 respondents (10%) who said conflicts often occur between the community and the proponent regarding recruitment issues which are not in accordance with the original agreement that more priority is to be given to local people. In addition, social

PT Supreme Energy Muara Laboh 321 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW conflicts are also triggered by the prohibition of people taking firewood from the proximity of the PLTP area that borders with Kerinci Seblat National Park. The social conflict resolution in the study area is achievved through an institutional approach and by community leaders. The figure below shows a social conflict resolution of the community located in the location of development or additional production wells for the geothermal power plants (PLTP).

6, 15% 11, 28% 2, 5% localOrganisasi customary adat organizationsetempat

legal remedy (police) Jalur hukum (kepolisian)

settled by conflicting parties themselves 5, 12% Diselesikan sendiri oleh pihak yg konflik Deliberation among community andMusyawarah their leaders dng warga & Tokoh Masyarakat Nagari/Sub-districtPemerintahan nagari/camat Government 16, 40%

Source: Primary Data 2014

Figure 0-7 Respondent Opinion on Social Conflict Resolution in s’ Study Area

The above figure shows that social conflict resolution in the study area are relatively diverses. Respondents that said social conflicts were resolved through deliberations among residents and community leaders were 16 people (40%) of the total respondents. While 11 respondents (28%) stated that social

PT Supreme Energy Muara Laboh 322 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW conflict resolution in the community is achieved through the village administration (pemerintah nagari) and head of sub- districts. Respondents who said conflict resolution was reached through the customary organization were six people (15%) based on the grounds that the customary organizations or institutions still play their roles. Respondents who are of the opinion that social conflict resolution was achieved through legal actions were 2 (5%), on the basis that if the conflict cannot be resolved by the community and its cultural leaders, and if the conflict tends to be a criminal violation. As for conflicts that lead to dissenting opinion, settlement of boundary disputes and fights between youths, the role of community leaders are still very appreciated in the study area. Social conflicts between the community and proponent concerning employee recruitment, land issues and prohibition of communities taking wood in thestudy area immediately adjacent to the TNKS (Kerinci Seblat National

Park) are solved through customary leaders, community members, and village administration along with the existing customary institutions available in the study area.

People in the study area have formed a habitual pattern that they still uphold values of Minang culture, which are guided by the teachings of Islam. The people's philosophy of life is known as the "Adat Basandi Sarak, Sarak Basandi Kitabullah". The

PT Supreme Energy Muara Laboh 323 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW people's habitual pattern in the study area in general is that gotong-royong (working together) still exists; such as placing water into the paddy fields by improving the water flow

(irrigation) together, repairing roads together, building/repairing mosques together, etc. Cooperation is also manifested in the settlement of various issues by deliberation to achieve a consensus.

Another habitual pattern of collaboration in the kinship system can be seen at weddings and religious events (Maulud Nabi, Isra

'M'iraj, Shalawat Dulang). Collaboration activities are also evident during matrimonial ceremonies, feast and other traditional events. The kinship system among fellow citizens during this time is also quite good, it is seen from the habit of residents of different ethnic groups gathering in order to strengthen friendship; and this is always held at the time of

Muslim’s Eid in the form of religious gathering.

Based on the above description, the socio-cultural components of the community in general still support local traditional cultures i an intact and pure manner, therefore the scale of environmental quality can be categorized as in good condition

(scale 4) and the impacts are classified as very significant

(scale of 5).

PT Supreme Energy Muara Laboh 324 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

3.3.2.2 Level of Education

The education sector is a very important social aspect in improving the human resources of a nation; a country's progress can be measured by the education level of its people. The development of the quality of human resources is determined by the level of education as an indicator of a nation's human development index. The level of public education in Pauh Duo

Sub-district is in general relatively low; people in the study area are found as not having completed primary school education and a large number of people only completed primary school

(elementary school). The following table indicates the composition of the level of education of population in nagari

Pauh Duo Sub-district, as follows:

Table 0-36 Population by Highest Level of Education Completed and

Gender, 2013

Highest level of Gender No. Total % Education completed Male Female

1. Not/Not Yet in School 524 534 1,058 7.04

2 Not Completed Primary 2,041 2,117 4,158 27.67

School

3 Completed Primary 2,438 2,242 4,680 31.14

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Highest level of Gender No. Total % Education completed Male Female

School

4 Junior High School or 1,292 1,310 2,603 17.32

equivalent

5 Senior High 859 918 1,777 11.82

School/Islamic High

School

6 Vocational High 105 79 184 1.22

School

7 Diploma I/II 44 167 211 1.40

8 D III / Academy 36 51 88 0.59

9 S1 (Bachelor Degree)/ 121 137 258 1.72

D IV

10 Master/Doctoral 10 2 13 0.09

Total 7,472 7,556 15,028

Source: Solok Selatan District - Education Office 2014

The above data indicates that the majority fo the people have completed their primary school, which is 4,680 people or 31.14% out of the total population of Pauh Duo Sub-district. The second highest majority is the people who have not completed their elementary school which consists of 4,158 people or 27.67%; and

PT Supreme Energy Muara Laboh 326 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the number of people who have completed junior high school

(SLTP) is 2,603 people or 17.32% of the total 15,028 people in

Pauh Duo Sub-district.

The level of education of the people in the study area of Nagari

Alam Pauh Duo is classified as relatively medium; this is shown by the population that have completed senior high school which comprises 473 people. In 2010 approximately 5.5% of Nagari Alam

Pauh Duo children gained tertiary level of education. Most of the people from Nagari Alam Pauh Duo who obtained tertiary education do not live in the nagari; most of them live in

Padang, Pekanbaru, Medan, and Java, or even abroad such as in

Malaysia, Singapore and other countries. The following table indicates the number of education facilities available in Pauh

Duo Sub-district:

Table 0-37 Number of Schools According toLevel of Education and

Status, 2013

School Status No. Types of Education Total Public Private

Kindergarten (Taman Kanak- 1. 1 11 12 Kanak / TK)

2 Primary School (Sekolah 15 0 15

PT Supreme Energy Muara Laboh 327 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

School Status No. Types of Education Total Public Private

Dasar / SD)

Junior High School (Sekolah

3 Lanjutan Tingkat Pertama / 5 2 7

SLTP)

Senior High School (Sekolah

4 Lanjutan Tingkat Atas / 1 0 1

SLTA)

Total 22 13 35

Source: Patah Duo Sub-district in figures, 2014

Further, education facilities in the study area for the additional production wells for the PLTP are considered adequately available for the learning process. The following table indicates the number of education facilities in the study area:

Table 0-38 Number of Education Facilities in Nagari Alam Pauh Duo

Jorong Educational Institution

PT Supreme Energy Muara Laboh 328 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Junior Senior Pre- Primary Kindergarten High High school School (TK) School School (PAUD)*) (SD) (SLTP) (SLTA)

Pakan Salasa 1 1 1 1

Durian Tigo 1 1 1 1 Capang

Ampalu 1 1 1 1

Sapan Sari 1

Pekonina 2 1 1 2

Kampung Baru 1

Taratak Tinggi 1

Simancung 1 1 1 1

Total 6 5 8 5 1

Source: Nagari Alam Pauh Duo Office, 2013

Remarks: *) PAUD: Early Childhood Education (Pendidikan Anak

Usia Dini/PAUD)

3.3.2.3 Religion and Beliefs

People who come into contact directly with and live adjacent to the area of additional planned production well construction for

PLTP in Nagari Alam Pauh Duo and Duo Nan Pauh Batigo are almost

100% Moslems. The daily community activities in carrying out

PT Supreme Energy Muara Laboh 329 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW worship rituals and other religious activities are facilitated by the presence of houses of worship. The existence of several mosques, mushola and surau for citizens are used in conducting daily prayers in congregation and celebrating Islamic festive days such as the Birthday of Prophet Muhammad, IsraMi’raj

(ascension) and others.

Mosques and mushola also function as places for religious activities to build good atitude through various activities such as routine wirid (remembrance of God), during religious studies, and through education center where smaller children learn the

Quran and gain religious knowledge, such as in Taman Pendidikan

Al-Qur'an (TPA / TPQ/Quranic Education Unit for Children),

Madrasah Diniyah (MDA/Islamic Elementary School) and MTs

(MTs/Islamic Junior High School). There are relatively a large number of worship facilities that are found in the study area; all Jorong have mosques and mushola. Table 0-39 and Table 0-40 below show the number of mosques and mushola in Nagari Alam Pauh

Duo.

Table 0-39 Number of places of Worship According to Nagari its

Type in Pauh Duo Sub-district, 2013

No Nagari Type of Place of Worship

PT Supreme Energy Muara Laboh 330 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Mosque Musholla Church Others

(small

mosque)

1. Alam Pauh Duo 11 5 - -

2. Pauh Duo Nan Batigo 6 4 - -

3. Luak Kapau Alam 6 11 - -

Pauh Duo

4. Kapau Alam Pauh Duo 3 2 - -

Total 26 22 - -

Source: Patah Duo Sub-district in figures, 2014

Table 0-40 Number of Worship Facilities in Nagari Alam Pauh Duo

No. of Name of Jorong No. of Mosques Musholla

Pakan Salasa 1 unit 28 units

Durian Tigo 1 unit 1 unit

Capang

Ampalu 1 unit 2 unit

Pekonina 28 units 1 unit

Sapan Sari 2 units 1 unit

Kampung Baru 1 unit 2 units

Taratak Tinggi 1 unit 2 units

PT Supreme Energy Muara Laboh 331 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Simancung 1 unit 2 units

Total 11 units 14 units

Source: Nagari Alam Pauh Duo Office, 2013

The distribution of places of worship help people perform their daily worship, as a place to celebrate the Islamic holidays as well as the availability of religious education / morals for children. Based on the above, environmental quality scale of the religions and beliefs components can be categorized as good or scale 4.

PT Supreme Energy Muara Laboh 332 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

3.3.2.4 Institutionalism

The community social life structure in the Nagari Alam Pauh Duo,

Pauh Nan Batigo and Lubuk Gadang Selatan Tinggi study area, as the areas having direct contact with the construction activities of PLTP Muara Laboh by SEML, has several formal and informal institutions in place. The existence of formal and informal institutions are of help in assisting people in completing various citizenship administrative requirements, putting talents and hobbies to use as well as strengthening the community kinship system. Social interaction that takes place in formal and informal institutions is a form of social relations that are reciprocal in its contribution.

The formal and informal institutions in carrying out its roles and functions have not yet been supported by adequate means, especially from the village administration (nagari) and sub- village (jorong). Institutions existing in the study area in general is the (KAN), Nagari Consultative Body (Bamus),

Institute for Community Empowerment Nagari (LPMN), farmer groups, the Village Unit Cooperatives (KUD), Youth Organization

(Karang Taruna), Religious Study Club (Majelis Ta'lim), groups on Islamic studies, funeral organizing groups (kelompok

PT Supreme Energy Muara Laboh 333 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW kematian), Quranic recital group (kelompok yasinan), Family

Welfare Improvement society (PKK) and youth groups.

3.3.2.5 Ownership and Land Tenure

The planned additional wellpads and production wells to be developed are located in the productive community paddy fields in jorong Taratak Tinggi nagari Alam Pauh Duo. The economic life of the people in the study area depends on agriculture especially in rice paddy fields. The land in Jorong Taratak

Tinggi is generally owned by individuals for it was bought by the community as well as obtained through manaruko (opening) of forest and shrubs. Based on interviews with the Representative of Jorong Taratak Tinggi and the community, lands in Jorong

Taratak Tinggi have been cultivated by the community for a long time because the land was a former Dutch tea plantation which had been abandoned and was no longer maintained.

The additional wellpads and production wells for the construction of PLTP with a capacity of 250 MW are located on the land having a former status as HGU ( Right to Use) land of

PT Pekonina Baru which was a tea plantation belonging to the

Dutch colonial government and has now become the property of and controlled by the government. Prior to the construction of PLTP in 1990, the land was used or cultivated as a place to grow

PT Supreme Energy Muara Laboh 334 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW crops (rice fields and plantation) by the people from various regions such as Muara Labuh, Ulu Liki, Alahan Panjang, Talang

Babungo, Pakan Rabaa and other areas. Being a former tea plantation, there are certain people that claim it as communal land. The process of land ownership and custody by SEML was done by giving a profitable compensation which is considered as adequate to all land owners/workers. The mechanisms of profitable compensation for the community land and crops affected by the construction of PLTP was done through the local government or customary traditions, namely the Head of Sub- district, Wali Nagari, Ninik Mamak and landowners.

The planned construction of wellpads and production wells

(Wellpad ML-09) in an area of ± 1 ha is located in the middle of

Jorong Taratak Tinggi community paddy fields. While wellpads and production wells ML-06 and NL-07 are planned to be constructed in Idung Mancung in an area of ± 2 ha that is located in an area close to the borders of TNKS, land of which had been cultivated by the people, according to these land workers, it must also be acquired by the proponent;.in addition, there is also still land acquisition process taking place for Wellpad J and Wellpand I that are also close to the area bordering TKNS.

PT Supreme Energy Muara Laboh 335 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

From the results of field monitoring of SEML PLTP land ownership, it is indicated that profitable compensation has been provided for the community’s land located in the PLTP construction area by SEML in accordance with the prevailing rules. No people raise complaints about land issues related to the construction of PLTP in the study area, which means that the community land acquisition process has worked well and that no parties have sufferred harm because of land issues in the PLTP project development and all had already been settled by means of deliberations to achieve consensus through the nagari institution and regional government. Based on the results of field surveys, all community land had been given a profitable compensation by SEML. Based on the above description, ownership and tenure of land are in a fair condition (scale 3) and the impact is classified as more significant (scale 4).

3.3.2.6 Community Perception

Public perception or views regarding the plan for the development and addition of production wells and wellpads to meet the PLTP production capacity, as seen from community social interaction with construction activities of PLTP in the study area. Perception can be interpreted as a person's understanding, opinion or response regarding an object that is usually

PT Supreme Energy Muara Laboh 336 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW different from one another due to tendencies and experience.

Perception also means a process by which individuals organize and interpret sensory impressions so as to give meaning to his environment (Robbins, 1996).

Therefore, perception can involve processes to identify, describe, recognize again, and consider the objects obtained through various information.

Furthermore, public perception on the plan to build PLTP production wells in Pauh Duo Sub-district, Nagari Alam Pauh Duo and Pauh Duo Nan Batigo may lead to a variety of interpretations from the society of an activity.

This study is to look at the response, attitude and views of the community to the planned construction of the PLTP based on socio-cultural aspects at the activity locations, namely Jorong

Kampung Baru, Taratak High, Pekonina and Pinang Awan, as agricultural areas. Community perception can be identified through labor recruitment, land acquisition and so can the perception of the PLTP construction activities that have been going on for 4 years.

PT Supreme Energy Muara Laboh 337 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Public negative perception is a form of local community reaction to the presence of and activities in PLTP Muara Laboh construction by SEML in Nagari Alam Pauh Duo, Pauh Duo Sub- district.

The aforementioned perception may be positive or negative. As a prevalent thing in a society, a positive perception arises when people do not feel aggrieved and even communities can gain benefits, but this would be the opposite in the case of negative perceptions. Therefore, public perception will affect the dynamics and the continuation of the PLTP construction activities. Public perception will be identiied from the reaction of the pros and cons or the positive and negative reaction to the planned construction of the PLTP. The table below indicates public perception regarding the additional construction of wellpads, to meet the capacity of the PLTP in the study area.

Table 0-41 Public Perception on PLTP activities in Alam Pauh Duo

Sub-district

Position Statement Frequency Percentage

Strongly Disagree 2 5%

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Disagree 3 7.5%

Be doubtful/ 1 2.5%

Indifferent

Agree 21 52.5%

Strongly Agree 13 32.5%

Total 40 100%

Source: Source: Primary Data 2014

The above table indicates that public perception on the construction of additional wellpads in the Alam Pauh Duo Sub- district somewhat varies. Respondents who agreed to the construction of the geothermal power plant (PLTP) were 21 people or 52.5% with the reason that the capital for the construction of the geothermal power plants should not be missed out, and the community can immediately maximally enjoy electric power

(electricity blackout by rotation will not happen again).

Meanwhile, number of respondents who expressed their strong agreement is 13 persons or 32.5% of the total number of respondents with the same reason; in addition, the PLTP activities can develop and promote the area. Further, the number of respondents who disagree is 3 persons (7.5%) with the reason

PT Supreme Energy Muara Laboh 339 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW that PLTP activity may cause worry to the community like the case of Lapindo mudflow, and it may lead to rice paddy field drought and climate change in the area around the construction site of the geothermal power plant (PLTP) due to moisture/dew.

Based on the above description, the negative perception of the public on the environmental quality can be categorized as medium

(scale 3) and the impact is very significant (scale 5).

Public perception on the issues on additional production wells for PLTP somewhat varies. People's opinion about the additional sites for production wells would need additional land to be acquired; in addition, other environmental impacts may be created. The figure below shows the public perception of environmental problems that may occur related to activities of the addition of production wells for the PLTP in Nagari Alam

Pauh Duo.

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1 (3%) 19 (47%) 7 (18%)

Land acquisition process haLahans not belum finished selesai Rice Kekurangan field lack airof water sawah

EnvironmentalPencemaran lingkunganpollution SocialKonflik conflict sosial DisturbanceGangguan laluto traffic lintas 8 (20%) 5 (12%)

Figure 0-8 Perception on Environmental Issues Related to

Additional Productions Wells (Wellpads) for PLTP Muara Laboh

The above Figure shows that environmental problems regarding the additional wellpads in the study area somewhat varies.

There are 19 Respondents (47%) out of the total number of respondents interviewed who have opinions that there is a problem land that some of the land has not yet been acquired is because there is no clarification yet from SEML regarding the additional production wellpads on the land where the community’s paddy fields are located and the land cultivated by the people in the TNKS border area whether compensation for such land will be given or not.

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The road built by SEML that leads to TKNS land is used by the community to clear a new area, and some of them also take timber. Because SEML assisted the government in urging people not to clear land in the TNKS border area, a group of community members who have negative mind had an opinion that the presence of SEML had disturbed socio-economic activities of the people who were used to farming and getting timber from the TNKS area.

Further, in relation to illegal logging done by the community in the border area of TNKS and even the community’s entering the TNKS area, SEML had banned this by placing several guard posts, and TNKS should be more proactive in preventing the TNKS area from encroachment by illegal loggers coming from various regions.

This prohibition should also have been followed with the participation of government officials at the village, subdistrict and district levels.

Based on the data obtained from the result of the survey on land acquisition, previously SEML had paid profitable compensation based on the prevailing regulations and none of the community members suffered harm due to the land acquisition.

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There are five respondents (12%) who have an opinion that the issue of lack of water for people's paddy fields is caused by

PLTP construction, with the reason that since the existence of

PLTP people felt that there is a lack of a water supply for the paddy fields and the acquisition of the fields for PLTP activities might cause the change in and disturb the water flow to the community’s fields that border the fields that have been compensated by the proponent.

There are 8 respondents (18%) who stated that the additional wellpads will create an impact of environmental pollution to the surrounding areas with the reason that there will be a temperature and climate change around the area of construction of PLTP as well as flood and erosion.

The additional wellpads and construction of the new roads by the proponent is in line with the design requirement by taking into account the land clearing which should be in line with the land size required to avoid flooding and erosion. At the construction site, because it rarely rains and the climate is warm, there is a concern that community crop production will decrease due to the climate change caused by the release of geothermal steam into the surrounding atmosphere.

The number of respondents that stated that social conflicts

PT Supreme Energy Muara Laboh 343 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW occur due to activities related to the construction of additional wellpads are 7 people (18%); this is because recruitment has not yet been fulfilled for only a limited number of workers were recruited.

In addition, the recruitment process is still considered as unfair and not transparent.

3.4 PUBLIC HEALTH

The planned construction of PLTP Muara Laboh is located in the territory of Sangir and Pakan Selasa Community Health Centers

(Puskesmas). The ten main diseases exist within the territory of these community health centers are environment-based diseases which seem to be dominant, particularly Acute Respiratory Tract

Infections (Infeksi Saluran Pernafasan Akut / ISPA) and diarrheal diseases (Table 0-42).

Table 0-42 Largest Number of Diseases in the Sangir and Pakan

Selasa Community Health Centers

Number Number Name of Name of No. of No. of Disease Disease Cases Cases

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Sangir Community Health Pakan Selasa Community

Center - Sangir Sub- Health Center -Pauh Duo

district Sub-district

Acute Acute

Respiratory Respiratory 1. 4604 1 739 Tract Tract

Infections Infections

2 Gastritis 1618 2 Hypertension 506

3 Diarrhea 1414 3 Gastritis 422

4 Hypertension 1145 4 Febris 351

5 Rheumatism 1094 5 Rheumatism 273

6 Accidents 901 6 Tronsilo 236

7. Typhoid 877 7 Common co 184

8 Scabies 427 8 Diarrhea 214

9 Asma 314 9 Allergies 146

10 Miscellaneous 224 10 Accidents 142

Source: Sangir and Pakan Selasa Community Health Centers

(Puskesmas), 2012

Based on the study area, PLTP Muara Laboh construction activities are located in two (2) sub-districts, namely Pauh Duo with Jorong Kampung Baru, Taratak Tinggi, Ampalu, Pinang Awan,

Sapan Sari dan Pekonina; and Sangir Sub-district with Jorong

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Liki. Illustration of community health status in the study area

(jorong) is based on primary data collection in the community from 70 households with the following results.

3.4.1 Ilnesses Pattern

Environmental diseases are still the largest health problems in the community, which are reflected in the high morbidity rate of environment-based diseases in the community’s visits to health care facilities.

The high morbidity rate is attributable to the poor condition of basic sanitation, especially clean water and sanitation.

From the results of primary data collection, environmental disease occurrence was found in the vicinity of the PLTP Muara

Laboh project site consisting of four (4) jorong, as follows:

27.5 7.5 total 75 47.5 40 10 kp. Baru 90 70 kulit 10 0 malaria taratak tinggi 90 50 ispa 30 10 liki 50 diare 30 30 10 pekonina 70 40

0 20 40 60 80 100

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Figure 0-9 Environment-Based Disease Occurrence in Study

Area

Based on the above Figure 0-9, it is shown that environment- based diseases are dominated by Acute Respiratory Tract

Infections (Infeksi Saluran Pernafasan Akut / ISPA) at a rate of

75.05%, then it is followed by Diarrhea at a percentage rate of

47.5%..

3.4.2 Access to Public Health Services

Public Health Care is needed by the community for curative, promotive, and rehabilitation activities. Health care is an indicator of community health. The availability of health care service center nearby the project site will provide easier access for the community when they have health problems.

The construction site of the PLTP is within the territories of two community health centers (puskesmas): Puskesmas Sangir and

Puskesmas Pakan Selasa. Puskesmas Sangir has 8 supporting community health units (puskesmas pembantu), comprising 5 units of Village Polyclinics (polindes/poliklinik desa), 2 units of mobile puskesmas, 2 general practice units with 5 doctors and 4 nurses, 58 units of integrated health services post for children under five years of age (posyandu balita), and 4 units of senior citizens integrated health services post (posyandu lansia).

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Puskesmas Pakan Selasa has 7 supporting community health units

(puskesmas pembantu), and 10 Village Polyclinics (polindes / poliklinik desa). In addition, there are also private health clinics that is capable of providing services to the community.

PuskesmasPublic Health rumahhospitals sakit bidanmidwives desa witchbatra/dukun doctor Centers 70 60 60 57.5 50 40 30 30 25 20 15 10 10 10 10 0 0 0 0 2.5

pekonina liki taratak kp. Baru total tinggi

Figure 0-10 Access to Public Health Services

Based on the above Fugre III-10 there are a number of health care alternatives available for the community which is not limited only to the puskesmas, but also can the people ask for the assistance of practicing nurses/midwives and other paramedics. Therefore it reduces the people's efforts to seek cures from non-medical or traditional health services.

Facilities mostly used are the services of the village nurse/midwife (70%), but certain members of the community, which

PT Supreme Energy Muara Laboh 348 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW is 30%, are still found to seek the services of alternative medication (witch doctors/paranormal) .

3.4.3 Basic Sanitation Facilities

Basic sanitation is an optimum environmental condition or state bringing a positive effect on the realization of optimum health status.

Several indicators were used to see the effects of environmental health, among others, the ownership of clean water facilities, the use of defecation and waste disposal facilities.

Based on secondary data available, environmental health facilities in the working area of Puskesmas Pakan Selasa and

Sangir are as follows:

Table 0-43 Types of Basic Sanitation in Puskesmas Sangir and

Pakan Selasa Work Areas

Type of Total Type of Total

No Sanitation No Sanitation

Facilities Facilities

Puskesmas Sangir - Sangir Sub- Puskesmas Pakan Selasa -

district Pauh Duo Sub-district

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Clean Water Clean Water 1. 3,060 1. 8,912 Facilities Facilities

2. Family Toilet 1,109 2. Family Toilet 2,748

3. Waste Water 2,517 3.

Disposal System

(Sistem

Pembuangan Air

Limbah / SPAL)

4. Dumpsters 2,760 4.

Source: Puskesmas Sangir dan Puskesmas Pakan Selasa, 2012

Due to the fact that the planned construction activities of PLTP

Muara Laboh is located within the territory of the two puskesmas, namely Puskesmas Pakan Selasa with Jorong Kampung

Baru, Taratak Tinggi, Ampalu, Pinang Awan, Sapan Sari dan

Pekonina; and Puskesmas Sangir with Jorong Liki; sanitation facilities dedicated for the use of the nearby communities are as follows:

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PMA/Pansimas dugsumur well gali sungairiver

55 total 10 20 70 kp. Baru 30 0 80 taratak tinggi 20 0 10 liki 30 60 60 pekonina 20 20

Figure 0-11 Percentage of Community Clean Water around

Project Site

Based on the above Figure, it is shown that the source of water supply for the communty is originated from protected springs through the Pansimas project, in particular the community in

Taratak Tinggi and Pekonina, while those using wells are the community of Jorong Kampung Baru; those that make use of the river coupled with a pipeline are generally from the Jorong Liki community.

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80 80 80 70 70

60 50 52.5 50 40 40 Jambanlatrines 40 30 toiletsMCK 30 Sungairivers 20 10 10 10 10 10 7.5 10 0 0 pekonina liki taratak kp. Baru total tinggi

Figure 0-12 Percentage of Community Toilet Facilities In the

Study Area

Based on the above image, it is shown that people make use of the river as toilets (80%). This is because the location of the study area are passed by rivers.

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60 50 50 50 40 40 40 40 40 40 32.5 30 30 riverSungai 30 27.5 road/yardjalan/halaman 20 20 20 20 20 opensaluran channel terbuka

0 pekonina liki taratak kp. Baru total tinggi

Figure 0-13 Percentage of Community Waste Water Disposal

It is shown in Figure 0-13 that community waste water disposal is not managed well. The community waste water disposal is directed to the river, garden and yard openly.

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total 2.5 97.5

kp. Baru 10 90

taratak tinggi 0 100

liki 0 100

pekonina 0 100 0 20 40 60 80 100

tidakno Yayes

Figure 0-14 Percentage of Community Waste Disposal in the

Study Area

Figure 0-14 shows that the garbage disposal system in the study area in general does not include a temporary disposal area, and the people manage it by burning and throwing the garbage into the bushes.

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70 70

60 50 50 40 40 40 ventilationventilasi 40 32.5 3030 30 30 30 30 lightingPencahayaan 27.5 30 25 nottidak compact padat 20 20 20 2020 20 20 windowjendela

0 pekonina liki taratak kp. Baru total tinggi

Figure 0-15 Percentage Community Healthy House According to

the study area

Based on Figure 0-15, it is shown that the requirements for a healthy house in the study area is due to the lack of house ventilation, in addition, the people seldom open their windows in the morning, causing inadequate lighting in the house.

Observing the public health conditions as seen from environmental-based diseases, health care utilization and environmental health, it can be concluded that the environmental quality scale of the initial environmental setting is medium

(scale 3) and the impact is more significant (scale 4).

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3.5 TRANSPORTATION

3.5.1 Road and Transportation Facilities in Location of Study

Solok Selatan District with the capital Padang Aro, has a strategic position because it connects the province of West

Sumatra with Jambi Province. The distance from Padang Aro to

Padang City is approximately + 200 km, with travel time of 5-6 hours, by 4-wheel vehicle.

The road that connects the city of Padang to Solok Selatan

District is one of the main roads which is the provincial road that connects the two provinces. The total length of the existing road in Solok Selatan District in 2011 increased significantly to 1,941.96 km. However, this increase in roads was not followed by an increase in the number and quality of roads.

From the point of view of the road surface type, the length of district roads that have been coated with asphalt is only 88.53 km, the road covered with gravel is 310.50 kmin length, the dirt roads are 972.50 km, while 262.18 km constitutes other roads.

PT Supreme Energy Muara Laboh 356 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Table 0-44 Length of Road (km) According to its Surface and

Governmental Authorization Status in Solok Selatan

District 2012

Governmental Authorization Status Classification National Provincial District Total

Asphalt - 135.25 88.53 223.78

Gravel - 43.00 310.50 353.50

Dirt - 170.00 972.50 1,142.50

Others - - 262.18 262.18

Total - 348.25 1,633.71 1,981.96

Source: Solok Selatan District - Public Works Office 2012

The highway streteching between the two provinces is the backbone of the economy, therefore, good road conditions will facilitate smoother transportation flow and increase economic transactions. The condition of the roads that connect the city of Padang Aro with Muara Labuh at present is good, but damaged roads are found also. Based on the information obtained from the

Public Works Office of Solok Selatan District, it is noted that there are still many roads which are in damaged and severely damaged conditions, which are respectively 387.90 km and 1089.45

PT Supreme Energy Muara Laboh 357 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW km in length. In the meantime, length of the roads in good condition is 275.62 km and 228.99 km in medium condition.

To reach the PLTP Muara Laboh location, which is in Pauh Duo

Sub-district, after passing Muara Labuh there is a winding road of approximately 10 km or about 30 minutes drive through asphalt paved roads and at Nagari Pekonina, the entrance is an 8 meter wide road that is still in the hardening stage. The road connects several wellpad locations as well as the PLTP Muara

Labuh location.

The data of 2012 in figures originating from Alam Pauh Duo Sub- district, Sangir Sub-district and Pauh Duo Sub-district, are shown in the Table 0-45 below.

Table 0-45 Number of Bridges and Road Segments Based on Length

Pauh Duo Sub- Sangir Sub-district district Description Number Length Number Length

(units) (Meter) (units) (Meter)

Bridges 15 310.00 29 886.50

Road 50 159.50 98 321.42

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Segments

Source: Profiles of Alam Pauh Duo Sub-district, 2012 and Sangir

Sub-district, 2012

The number of bridges in Sangir Sub-district is 29 units with a length of 886.50 meters, and in Pauh Duo Sub-district is 15 units with a length of 310 meters, while the length of roads in

Sangir Sub-district is 205.00 km and in the Pauh Duo Sub- district it is 159.50 km.

Table 0-46 presents the length of the roads and their types of pavements; in Pauh Duo Sub-district, the length of asphalted roads is 41,20 km, gravel roads is 33,60 km, and dirt roads is

82,40 km, while reinforcement by concrete in this sub-district is not yet available. The reinforcement in Sangir Sub-sdistrict for asphalt paved roads is 27.52 km in length, concrete pavement

3.50 km, while gravel roads is 85.40 km in length, and dirt roads is 205 km in length.

Table 0-46 Road Length (km) According to Type of Road Surface

Pauh Duo Sangir Sub- Description Sub-district district

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Pauh Duo Sangir Sub- Description Sub-district district

Asphalt Road 41.20 27.52

Concrete Road - 3.50

Gravel Road 33.60 85.40

Dirt Road 82.40 205

Other Roads 2.30 -

Total 159.50 321.42

Source: Profiles of Alam Pauh Duo Sub-district, 2012 and Sangir

Sub-district, 2012

3.5.2 Road User Safety Facilities

Some locations have been installed with road mirrors and traffic signs, which are placed at accident prone areas/locations.

According to observation results during a study conducted in

Solok Selatan District, they do not yet have a public transportation system to provide transportation services, especially in Padang Aro, the center of Solok Selatan District.

Based on observation results, the use of vehicles as a means of transport that can mobilize people from one place to another is

PT Supreme Energy Muara Laboh 360 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW dominated by 2-wheeled vehicles (motorcycles).

Solok Selatan District only has a transportation terminal which is rural class scale. Public transportation are currently only served by rural transport that shuttles from one market to another. While transportation for traveling outside the district is served by regular and mini buses which unofficially provide the transportation service for Padang-Padang Aro, Padang-Muara

Labuh, Solok-Padang Aro dan Solok-Muara Labuh routes.

Based on the data from Solok Selatan District Transportation

Service Office of Pauh Duo Sub-district, accident-prone areas are located in Pekonina and Pakan Selasa, while in Sungai Pagu

Sub-district the accident-prone areas are located in Kampung

Tarandam, Bariang Rao-Rao dan Rawan.

In Solok Selatan there are also several on-street markets (that cause congestions to the main roads), such as in Sungai Kalu where the market opens every Friday, Pakan Selasa which opens on

Tuesdays, Pakan Rabaa that opens every Wednesday, and Padang Aro that opens on Wednesdays and Saturdays; thus, they need special traffic arrangements in those particular days and locations.

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3.5.3 Low Awareness of Good Traffic Attitude

Based on information from Solok Selatan Subregional Police, low awareness of traffic regulations, and the inadequacy of supporting infrastructure are the main causes of traffic accidents n Solok Selatan. The problem of inadequate facility is the small number of public transport, causing the majority of students to use motorcycles for their activities. The rate of traffic accident victims in Solok Selatan is 60%, who are categorized as productive age and they use motorcycles.

To reduce the number of traffic accidents, Solok Selatan Police have intensified dissemination with students as its primary target by distributing materials on traffic rules to the students. Accident victim data in 2011 accounts for 35 cases with 15 mortality, 11 seriously injured, and 37 slightly injured.

Locations which are prone to traffic accidents cover Padang Aro,

Timbulun, Bariang Sangir that are located in Sangir Sub- district, Lalu Pulakek in Sungai Pagu Sub-district, and in the

Pekonina Area of Pauh Duo Sub-district.

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Table 0-47 Number of Vehicles Passing Pekonina

Number of Vehicles (units)

TR-1 TR-2 Time Vehicle (Block O T- (Mosque T-

junction) junctiion)

08:00 – Bus 4 -

10:00 West Truck, other 32 10

Indonesia transportation Time Public - -

Transportation

Private 108 18

Vehicles

Motorcycle 420 70

13:00 – Bus 5 1

15:00 West Truck, other 25 5

Indonesia transportation Time Public - -

Transportation

Private 128 25

Vehicles

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Number of Vehicles (units)

TR-1 TR-2 Time Vehicle (Block O T- (Mosque T-

junction) junctiion)

Motorcycle 390 58

15:00 – Bus 3 1

17:00 West Truck, other 16 3

Indonesia transportation Time Public - -

Transportation

Private 115 15

Vehicles

Motorcycle 210 50

Source: Survey Data Analysis Results, 2013

PT Supreme Energy Muara Laboh 364 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Other Other means means of of transport bus transport Private Private cars cars

motorcycles motorcycles

Figure 0-16 Percentage Ratio of Vehicles Passing Study

Location

Based on the result of the field, the number of motorcycles is very dominant in the study area, with TR-1 reaches 70%, and TR-2

69%.

3.6 OTHER ACTIVITIES AROUND PLANNED LOCATION

In general, the PLTP Muara Laboh planned construction area is located on land having a former status as HGU (Right to Use) land for Other Purpose Usage Area (Area Penggunaan Lain/APL).

The land used for the planned activities occupies a former plantation area for tea, coffee, and quinine of Pekonina (owned by the State), and community land (residential and agricultural land), which at present has already obtained permission from the

National Government and the Regional Government of Solok

Selatan.

PT Supreme Energy Muara Laboh 365 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL- RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Other activities present around the planned construction activity area for PLTP Muara Laboh at Solok Selatan District, are:

 Residential area, paddy fields and plantation,

 Kerinci Seblat National Park (Taman Nasional Kerinci

Seblat/TNKS) Pinang Awan,

 Micro-Hydro Power Plant (Pembangkit Listrik Tenaga Mikro

Hidro/PLTM)

 Hot Spring Recreation Park in Sapan Malulong.

Sampling location for all environmental components is shown by

Map 0-7

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Map 0-7 Locations for Sampling of Environmental Components

PT Supreme Energy Muara Laboh 367

CHAPTER IV SCOPE OF STUDY

4.1. SCOPING PROCESS

Scoping is the initial process to determine the scope of problems and identify significant impacts (hypotheses) related to the planned activities. The scoping of significant impacts is conducted through a series of processes, i.e. potential impact identification and potential impact evaluation.

The significant impact to be reviewed in the ANDAL and RKL-

RPL Addendum will be focused on the hypothetical environmental impact which may occur due to changes and new additional activities. The significant impacts on the environment as a result of activities that have been and are currently being undertaken, have been reviewed in the previous environmental study (2013 Amdal).

4.1.1. Potential Impact Identification

Identifying potential impact is, principally, estimating all the potential impacts of planned activities to be performed on the location with environmental baseline. From the identification of the potential impacts a list of potential impacts will be produced(Table IV-1). Other than that,

PT Supreme Energy Muara Laboh 368 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW potential impacts may also be identified by using impact identification method in the form of simplified interaction matrix (Table IV-2).

Table IV-1 List of Potential Impacts of Geothermal

Development Activities for 250 MW Muara Laboh Geothermal

Power Plant

IMPACT SOURCE POTENTIAL IMPACTS Preconstruction Stage 1. Land Acquisition - Land tenure change - Change of community perception Construction Stage 1. Labor Recruitment - Opening up of employment opportunity - Opening up of business opportunity - Changes in the Community revenue - Changes in Social values and norms - Changes of community perception 2. Equipment and material - Change in Air mobilization quality - change in Noise level - Traffic

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IMPACT SOURCE POTENTIAL IMPACTS transportation disturbance - Public health disorder 3. Land clearing - Change in air quality - Change in noise level - Change in erosion and sedimentation - Change in Surface water run-off rate - Change in Surface water quality - Terrestrial flora and fauna interruption - Aquatic biota interruption 4. Civil construction, - Change in air mechanical, electrical, and PLTP quality works - Change in noise level - Public health disorder 5. Production and injection - Change in air well drilling and production quality and noise well testing level - Change in Land water quality

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IMPACT SOURCE POTENTIAL IMPACTS - Change in Surface water quality Aquatic biota interruption - Public health disorder - Change of community perception 6. Termination of employment - loss of employment opportunity - Loss of business opportunity - Change in Community income - Change of community perception Operation Stage 1. Labor Recruitment - Opening up of employment opportunity - Opening up of business opportunity - Change in community income - Change in social values and norms - Change of community perception 2. Geothermal field - Change in air development quality and noise

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IMPACT SOURCE POTENTIAL IMPACTS

- Additional well level drilling (production - Change in ground and injection wells), water quality well testing and well - Change in surface maintenance water quality - Aquatic biota interruption - Social health disorder - Change of community perception 3. PLTP Operation - Change in air a. Commissioning quality - Change in noise level b. Turbine operation - Change in air quality - Change in noise level - Change in surface water quality Post-operation Stage 1. Production and injection - Change in air well closing, pipeline and quality supporting facilities un- - Change in noise installation, and PLTP level dismantling - Pubilc health disorder - Change of community perception

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IMPACT SOURCE POTENTIAL IMPACTS 2. Rehabilitation/reforestation - Erosion and sedimentation shift - Change in surface water run-off rate - Change in surface water quality - Change in terrestrial flora and fauna - Change in aquatic biota 3. Land Restoration - Land tenure change 4. Termination of employment - Lost of employment and business opportunities - Change in community income - Change in social values and norms - Change of community perception

PT Supreme Energy Muara Laboh 373

Table IV-2 Potential Impact Identification Matrix for Geothermal Development Activities for 250 MW Muara Laboh Geothermal Power Plant

OPERATION

PRE- GEOTHER COMPONENTS OF ACTIVITIES CONSTRUCTION POST-OPERATION CONSTRUCTION MAL PLTP FIELD

Land Testing Materials Condenser Laborr Recruitment Design Works Land Clearing Land Acquisition Land Restoration Demolitio of PLTP Preliminary Study Labor Recriutment Facilities as well ENVIRONMENTAL COMPONENTS and PLTP Construction Testing (Commissioning) Pipeline and Supporting Operation of Turbine and Termination of Employment Drilling, Production Well Termination of Employment Closure of Production and Testing and Well Maintenance Drilling and Production Well Injetion Wells, Demolition of Mobilization of Equipment adn Civil, Mechanical, Electrical Production and Injection Well Production and Injection Well Rehabilitation/Revegetatio of Air Quality • • • • • • • Noise • • • • • • • Erosion and Sedimentation • • Surface water run-off rate • • Ground water quantity • •

Components Surface water quality

Geophysical • • • • • and Chemical

Terrestrial Flora and Fauna • •

Aquatic Biota • • • • Componens Biological

Employment opportunity • • • • ic, e and Cultur Public Health

PT Supreme Energy Muara Laboh 374 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

OPERATION

PRE- GEOTHER COMPONENTS OF ACTIVITIES CONSTRUCTION POST-OPERATION CONSTRUCTION MAL PLTP FIELD

Business Opportunity • • • •

Community Income • • • •

Social values and norms • • • •

Land tenure • •

Community perception • • • • • • • •

Transportation •

Public health • • • •

PT Supreme Energy Muara Laboh 375

4.1.2 Potential Impact Evaluation

The hypothetical significant impacts reviewed in the study of

ANDAL and RKL-RPL Addendum are focused on the hypothetical significant impact that may occur to the environment due to change of and addition to activities, as elaborated below:

4.1.2.1 Pre-construction stage

During pre-construction stage, the activity inducing significant impact is land acquisition. Currently, SEML acquires almost all lands required for the project. Should there be any additional need for land, another land acquisition will be made.

4.1.2.2 Construction Stage

1) Drilling Activities

During this construction stage, additional drilling for 24 to

30 wells will be performed on 13 or more wellpads. The geothermal production wells are 1,500-3,000 meters deep below the land surface. The drilling may be made vertically or in a certain direction (directional well). The targeted structure for geothermal drilling is not the shallow ground water structure. Shallow ground water is avoided to intrude the

PT Supreme Energy Muara Laboh 376 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW wells and in turn reduces the temperature of the reservoir.

The whole part of the well hole will be covered by casing. To prevent intrusion of ground water into the well, instead of perforated casing. This casing will be attached to rock formation beside it using special cement. In a big hole, the casing diameter may reach 36 inches.

During the drilling process, water based mud (WBM) will be used as lubricant for drill bits. At a certain depth, the casing will be fixed to prevent the wall of the wells from collapsing and to prevent leakage from or to the formation.

The designs of both drilling equipment and wells conform to

API (American Petroleum Institute) and/or New Zealand

Drilling Standards that have capability of withstanding anticipated pressure. Furthermore, the drilling is also equipped with blow out preventer (BOP) and during the drilling, the workers will refer to the standard operational procedure to ensure their safety and security during the drilling work.

The condition of drilling area has been studied thoroughly and comprehensively pursuant to the disciplines of Geology,

Geophysics, and Geochemistry. It is very different from the drilling carried out by Lapindo. The location of Lapindo drilling has different geological setting from geothermal drilling in Muara Labuh. The geological structure of

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Lapindo’s drilling area is weathered sediment, while PLTP

Muara Laboh’s drilling geological structure is hard and massive volcanic rocks (pyroclastic and lava). Therefore, the case of Lapindo is not likely to happen in PLTP Muara Laboh.

Following the drilling, well heads will be fitted and the well is equipped with a device to control the fluid flow rate.

The chemical substances used in this project came with MSDS

(Material Safety Data Sheet). Most of the chemical substances are classified as non-hazardous and non-toxic wastes (non-B3) based on the list issued by the United States Environmental

Protection Agency (US-EPA) and Ministry of the Environment.

The storage and treatment for such chemical substances and waste will refer to the MSDS. The procedure for the treatment of drilling mud and drilling cutting shall be pursuant to

Governmental Regulation No. 101 of 2014 on Hazardous and

Toxic Waste Treatment. Explosives will only be used if problems are found during the drilling, i.e. to discharge the pipe if drill pipes are squeezed. The amount to be used is approximately 4 kilograms each time when there is a problem.

The existing explosives warehouse has a permit from the

Headquarter of Indonesian National Police (MABES POLRI) and it is monitored regularly by the relevant institutions, among others, by the Regional Police (Polda), Police Precinct

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(Polres) and Ministry of Energy and Mineral Resources (ESDM).

Any utilization of explosives must be with the knowledge of the local police and reported regularly to the relevant institutions.

Water required for drilling process is taken from surface water and rain run-off water. The amount of water used is limited and should be managed as such so that it will not interfere with community needs and conditions. During the drilling process, 30-60 liters/second of water is required.

It is very small compared to the river flows that could reach more than 1,000 liters/second. The water used is taken from the river which is not used for the need of the communities in the surrounding areas or on a limited basis taken from the river which is also used by the community such as for irrigation, etc.

In line with the procedure, for the purpose of using the water, Water Use Permit (SIPA Surat Izin Pemakaian Air) has been obtained from and issued by the relevant institution

(Schedule 9).

One of significant risks in geothermal drilling process is

H2S gas which in certain concentrate will cause death.

Therefore, during the drilling activities, each wellpad must be equipped with 4 units of H2S sensor mounted on 4 different

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locations identified as H2S gas dispersion area. The first alarm will be activated when ambient H2S content indicates 10 ppm and sirene for evacuation will be heard when the H2S ambient indicates 20 ppm. The safety officer with special protection equipment will manage the leakage of the H2S gas so that there is no more H2 gas dispersion in the ambient air.

The planned activities and components of activities that may create significant impacts on the drilling and production well testing are as follows:

a. Drill Cutting

During the drilling process, solid wastes in the form of drill cutting are produced along with water based mud. At the time of drilling, the drilling cutting is formed up to 300 m3 per well and stored temporarily in a concrete pond within the wellpad area and after drilling has been completed, it is moved and stored in the Temporary Storage (TPS) pursuant to

Governmental Regulation No. 101 of 2014 on Hazardous and

Toxic Waste Treatment, stipulating that drill cutting from geothermal activities is not categorized as not hazardous and toxic wastes (B3) thus it can be utilized as required or piled up in an appropriate location.

b. Drilling Mud

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In the drilling process, water based mud (WBM) will be used.

The main component is clay and therefore water based mud is not categorized as hazardous and toxic wastes pursuant to

Governmental Regulation No. 101 of 2014 on Hazardous and

Toxic Waste Treatment. When drilling has been completed, the drilling mud is mixed with brine in a proportional quantity to prevent sedimentation, and returned to the reservoir through injection wells. The drilling mud may also be dried up and utilized as construction raw materials or piled up in an appropriate location.

2) Production well testing activities

After drilling activities have been completed, production testing will be carried out upon the confirmation of heat recovery by thermal gradient survey. The purpose of this test is to estimate the well production and to create well production curve or deliverability. The wells will be opened with different valve positions or sizes to obtain a stable well production curve. This production curve functions as baseline for initial reference and the change of production curve in the future must be compared with this initial curve.

During production testing, the temperature and pressure will be measured to determine the depth of the feed zone and give

PT Supreme Energy Muara Laboh 381 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the profile when the well is in open condition during the production position.

a. H2S gas emission during production testing

Planned activities and components of activities during the production testing may generate emissions and dispersion, particularly H2S gas to the atmosphere, along with associated gas in the form of CO2 and Boron compounds. The well production testing is conducted by streaming fluid 2 wet steam to a Separator, through choke size of which varies. The separated dried steam is released to the atmosphere through

Rock Muffler which can reduce noise, while the brine is returned to the reservoir through injection wells. This process may last for 30 days. To sum up, the production well testing is presented in the figure below.

Gas H2 S + CO2 boron based vapor wet steam

production wells Dry Rock brine tank steam Noise Muffler

to injection wells

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Figure IV-1 Gas Emission during Production Well Testing

During production well testing, the release of vapor and gas to the atmosphere through the Rock Muffler may emit and disperse H2S. CO2 is not a pollutant, whereas the Boron content in the steam is very small thus giving insignificant impacts. On the contrary, H2S smells like rotten eggs and in a certain concentration is toxic which may degrade ambient air quality and cause harm to environmental health and comfort.

b. Noise during production testing

The release of steam to the atmosphere during production well test may create noise. However, using Rock Muffler, the noise could be controlled and the noise propagation is localized around the wellpads.

c. Formation of brine during production testing

During production testing, the steam is released to the atmosphere through the Rock Muffler and the brine formed is collected in the Thermal Pond or other available ponds. From that pond, the waste water is returned to injection wells.

This way, the brine treatment will be environmentally friendly.

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4.1.2.3 Operation Stage

Steam collected in SGS (Steam Gathering System) is channeled through the steam piping network to the PLTP. The operational activities of the PLTP starts from the steam being received in the Steam Receiving Header, then dry steam will enter turbine generator and eventually produces electrical power in the switchyard connecting point and then connected to PLN

Substation. These planned activities may result in the following impacts:

1) H2S gas emission

The geothermal fluid in the reservoir containing a non- condensable gas (NCG) that needs attention, among others, is

H2S. After that, NCG is separated from the steam fraction in the Steam Ejector, and released to the atmosphere through the

Cooling Tower stack that will emit and disperse H2S gas into the atmosphere. Thus, from the Cooling Tower, emission and dispersion of H2S into the atmosphere will occur and smells like rotten eggs and in a certain concentration is toxic and degrades ambient air quality which may be harmful to environmental health and comfort within the affected dispersion area. The Steam Ejector is type oof equipment having the function to create vacuum pressure in the

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Condenser with Venturi effect (convergent – divergent

nozzle). H2S gas is heavier than the air, therefore it tends

to accumulate and form the dangerous H2S gas hood on the

surface of the land, although finally it will be dispersed in

the air. Thus, to minimize the H2S gas emission, the gas is

dispersed with thermal draft in the Cooling Tower. The Gas

Removal System at the PLTP is presented in the figure below. dry steam

Emission of H2S, CO2 and Steam + Boron

Vacuum Separator wet steam from turbine condensate

condensate to injection wells

Figure IV-2 Schematic Diagram of NCG Removal System in

Geothermal Power Plant

As such, PLTP operation potentially creates significant

impacts on the air quality, especially with the dispersion of

H2S gas.

2) Condensate Water

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The condensation in the condenser produces condensate with

TDS content of approximately 5,000 ppm. The condensate contains silica that easily settles, and forms silica polymer in the form of crust stuck on the piping wall which is hard to clean, either mechanically or chemically. Boron is toxic to plants but its existence may prevent the formation of silica crust. It is a geothermal-field standard that the hot condensate must be returned to the reservoir through injection wells in order to be environmentally friendly.

3) Noise

In PLTP operation, the potential noise originating from

Cooling Tower fans, Steam Ejector, Turbine, and Generator. In the normal operation, noise propagation is localized only around the PLTP noise source and thereby the area can be made as PLTP buffer zone. The highest noise may occur at the PLTP when Turbine operation is interfered at the time the steam is released to the atmosphere through relief valves and as a result, a high level of noise for several hours can be heard up to 1 km away. In order to reduce the noise, the steam is channeled through the Rock Muffler before it is released from the relief valve. Thus, in normal operation, PLTP will generate noise only up to PLTP buffer zone, while in abnormal operation PLTP potentially creates significant impacts.

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4.1.2.4 Post-operation Stage

In this stage, there are no activities planned that create significant impacts, therefore it is not necessary to discuss this further in this ANDAL.

The potential impact evaluation matrix becomes hypothetical significant impacts is presented in Table IV-3 . Meanwhile, the correlation between one environmental impact and the other environmental impacts to determine primary, secondary, and tertiary impacts as well as to determine environmental components/parameters that have the greatest magnitude of

PT Supreme Energy Muara Laboh 387 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW impact is indicated in the flowchart as described in

Figure IV-3 and Figure IV-4.

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Table IV-3 Matriks of Hypothetical Significant Impacts of Geothermal Development

Activities for 250 MW Muara Laboh Geothermal Power Plant

OPERATION

PRE- GEOTHER COMPONENTS OF ACTIVITIES CONSTRUCTION POST-OPERATION CONSTRUCTION MAL PLTP FIELD

PLTP

Land Testing Materials Condenser Laborr Recruitment Design Works Land Clearing Land Acquisition Land Restoration Demolitio of Preliminary Study Labor Recriutment

ENVIRONMENTAL COMPONENTS and PLTP Construction Facilities as well Testing (Commissioning) Pipeline and Supporting Operation of Turbine and Termination of Employment Drilling, Production Well Termination of Employment Closure of Production and Drilling and Production Well Testing and Well Maintenance Injetion Wells, Demolition of Mobilization of Equipment adn Civil, Mechanical, Electrical Production and Injection Well Production and Injection Well Rehabilitation/Revegetatio of

Air Quality • • • •

Noise • • • • Erosion and Sedimentation • • Surface water run-off rate • •

Ground water quantity Geophysical and

Chemical Components Surface water quality • • • • •

Terrestrial Flora and Fauna • • nens Biolo gical Compo

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OPERATION

PRE- GEOTHER COMPONENTS OF ACTIVITIES CONSTRUCTION POST-OPERATION CONSTRUCTION MAL PLTP FIELD

Aquatic Biota • • • •

Employment opportunity • • • •

Business Opportunity • • • •

Community Income • • • •

Social values and norms • • • •

Health Components Land tenure • Economic, Culture and Public

Community perception • • • • • • • • Socio -

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OPERATION

PRE- GEOTHER COMPONENTS OF ACTIVITIES CONSTRUCTION POST-OPERATION CONSTRUCTION MAL PLTP FIELD

Transportation • •

Public health

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PRECONSTRUCTION CONSTRUCTION STAGE STAGE OF STAGE ACTIVITIES

TYPES OF ACTIVITIES Labor Recruitment Mobilization of Land Acquisition Equipment and Land Clearing Materials

PRIMARY IMPACT Change of Land Opening Up of Opening Up of Disturbance to Erosion and Disturbance to Terrestrial Fauna and Tenure Employment Business Sedimentation Opportunity Opportunity Transportation Flora Increase

SECONDARY Change of Change in Change of IMPACT Change of social Community surface water values and norms Couity’s Perception Income quality

TERTIARY IMPACT Change of Distubance to Community aquatic biota Perception

Figure IV-3 Flowchart of Hypothetical Significant Impacts During Preconstruction and Construction Stages

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OPERATION STAGE POST-OPERATION STAGE STAGE OF ACTIVITIES

Production and Injection Well TYPES OF ACTIVITIES Operation of PLTP Rehabilitation/ Labor Recruitment Drillling, Production Well Testing Termination of (Geothermal Power Plant) Revegetation of Land and Well Maitenance Employment

Opening Up of Opening Up of Erosion and Disturbance to Passing Up of Passing Up of PRIMARY Employment Change of air quality Change of surface water Business Sedimentation Terrestrial Flora Employment Business IMPACT Opportunity and noise quality Opportunity Increase and Fauna Opportunity Opportunity

SECONDARY Change of Social Change in Change in IMPACT Public health Public health Change of Aquatic Change of Values and Couiity’s disorder Couity’s disorder Biota Surface Water Norms Income Income Quality

TERTIARY Change of Change of IMPACT Disturbance to Community Community Aquatic Biota Perception Perception

Figure IV-4 Flowchart of Hypothetical Significant Impacts During Operation and Post-operation Stages

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4.1.3 Hypothetical Significant Impacts

In the preparation of ANDAL of the Planned Geothermal

Development Activities for PLTP Muara Laboh 250 MW, some hypothetical significant impacts have been found. Upon a thorough review, during the prepartion of ANDAL, several significant impacts have been found. However, all significant impacts can be well managed, thus the project is environmentally feasible. The planned activities or components of activities of Geothermal Development for PLTP

Muara Laboh 250 MW which is proven to have hypothetical significant impacts is presented in the table below:

Table IV-2 Hypothetical Significant Impacts of Geothermal

Development Activities for 250 MW Muara Laboh Geothermal

Power Plant

IMPACT SOURCE POTENTIAL IMPACTS Preconstruction Stage 1. Land acquisition - Change in Land tenure - Change of community perception Construction Stage 1. Labor Recruitment - Opening up of employment opportunity - Opening up of

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IMPACT SOURCE POTENTIAL IMPACTS business opportunity - Change in community revenue - Change in social values and norms - Change of community perception 2. Land clearing - Erosion and sedimentation shift - Change in surface water run-off rate - Change in surface water quality - Interruption to terrestrial flora and fauna - Interruption to aquatic biota 3. Civil, mechanical, electrical, - Public health and PLTP Construction disorder 5. Production well drilling, - Change in air quality injection well drilling and and noise level production well testing - Change in Land water quality - Change in Surface water quality - Aquatic biota interruption - Public health disorder

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IMPACT SOURCE POTENTIAL IMPACTS - Change of community perception

6. Termination of employment - Loss of Employment opportunity - Loss of Working opportunity - Change in Community revenue - Change of Social values and norms - Change of community perception Operation Stage 1. Labor Recruitment - Opening up of employment opportunity - Opening up of business opportunity availability - change in community income - Change in social values and norms - change of community perception 2. Geothermal field development - Air quality and noise - Additional well drilling level modification (production and injection - Surface water quality wells), well testing and change well maintenance

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IMPACT SOURCE POTENTIAL IMPACTS - Disturbance to Aquatic biota - Public health health disorder - Change of community perception 3. PLTP Operation - Change of air quality a. Testing (Commissioning) - Change in Noise level c. Turbine operation - Change of air quality - Change in noise level change - Change in surface water quality Post-operation Stage 1. Rehabilitation/reforestation - Erosion and sedimentation shift - Change in surface water run-off rate - Change in surface water quality - Change in terrestrial flora and fauna - Change in aquatic biota 2. Termination of Employment - Loss of employment and business opportunity - Change in community income

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IMPACT SOURCE POTENTIAL IMPACTS - Change in social values and norms - Change in community perception

Based on the result of the review of ANDAL of the Planned

Geothermal Development Activities for PLTP Muara Laboh 250

MW, for the same planned activities (construction of new wellpads, PLTP relocation, and supporting facilities construction), then the significant impacts are typically the same. Thus, the estimated hypothetical significant impacts of these ANDAL and RKL-RPL Addendum may refer to ANDAL Document of the Planned Geothermal Development Activities for PLTP

Muara Laboh 250 MW.

4.2 STUDY AREA BOUNDARIES AND STUDY TIMELINE

4.2.1 Study Area Boundaries

The Study area boundary is derived from project boundaries, ecological boundaries, social boundaries, and administrative boundaries. In addition, the study area boundaries are determined based on the considerations of time, funds, experts, and review method. Based on the above

PT Supreme Energy Muara Laboh 398 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW considerations, the study area boundary of the plan covers the area presented in Error! Reference source not found..

4.2.1.1 Project Boundaries

The boundaries of the project activities cover the geothermal field development area and the area where Geothermal Power

Plant (PLTP) and Supporting Facilities will be built.

4.2.1.2 Ecological Boundaries

Ecological boundaries are determined by considering the zone of impact dispersion of the planned activities which will be implemented based on the material transportation method in the form of solid and liquid materials constituting important materials transported in the impact flow and dispersion mechanism. The ecological boundaries are emphasized on waterworks aspect and air or wind movement.

4.2.1.3 Social Boundaries

The social boundaries are based on the space surrounding the study area, where social interaction and communication take place. The social process therein applies the system of social values and norms established in the community social system. Villages (Nagari) and hamlets (Jorong) within the

PT Supreme Energy Muara Laboh 399 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW sub-districts directly or indirectly are affected by geothermal field development and PLTP construction.

4.2.1.4 Administrative Boundaries

Administrative boundaries cover Pauh Duo and Sangir Sub- districts, Solok Selatan District, West Sumatra Province.

4.2.2 Study Timeline

In addition to the importance of scoping of impacts and study area, the study timeline is also necessary. The scoping of

ANDAL study timeline of Geothermal Development Activities for

PLTP Muara Laboh is presented in the following table.

Table IV-3 Study Period Scoping

No Impact Source and Hypothetical Impacts Period

1. Land acquisition, starting from 1 year survey, negotiation, payment up to land administration settlement takes 1 year 2. Recruitment of construction labor for 1 year 4 months, followed by recruitment of operation labor for 4 months near the completion of construction with an additional training period of 4 months 3. Production Well testing for each well, 3 years with a total of 5-6 exploration wells,

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No Impact Source and Hypothetical Impacts Period

27 production wells, and 5-6 injection wells to fulfill the steam requirements for PLTP 250MW. Drilling is planned to be carried out in stages until the end of 2018. 4. Geothermal field operation and PLTP 30 years

activities producing noise, H2S and CO2 dispersion, etc. will last 30 years since the operation. Estimated number of years of impact for 33 years all activities

Therefore, it can be said that the time required to prepare the operation is 3 years, while the operation period is 30 years since the completion of construction. Nevertheless, it should be understood that the cessation of an impact source does not necessarily mean the end of impacts at that moment because there is still a possibility of consequential impacts

(residual impacts) which will take a long time for recovery.

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Map IV-1 Study Area Boundaries

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CHAPTER V PREDICTED SIGNIFICANT IMPACTS AND EVALUATION OF SIGNIFICANT IMPACTS

5.1 PREDICTED SIGNIFICANT IMPACTS

SEML already has ANDAL and RKL-RPL documents for Geothermal

Development Activities for PLTP Muara Laboh 250 MW. From the result of the study of the AMDAL documents it is found that there are a number of Hypothetical Significant Impacts

(DPH/Dampak Penting Hipotetik). Further, during ANDAL preparation and after an in-depth review, it is found that evidently not all DPH are proven as significant impacts.

The signficant impacts stated in the previous Muara Laboh

AMDAL document remain to be significant impacts in this

ANDAL and RKL-RPL Addendum documents. Therefore this

ANDAL and RKL-RPL Addendum could indicate that the DPH mentioned are indeed classified as important impacts for the PLTP development activities in the new location along with the additional 7 new wellpads and construction of the supporting facilities.

The significant impact prediction is to predict the magnitude of the impact and describe the significance of the impact to determine the important value of each hypothetical significant impact. Therefore the important value of each impact could be identified, which impacts are classified as significant and which one are insignificant.

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Each impact always has two (2) measurements, namely the measurement which identifies the magnitude of the impact and the measurement which identifies the significance of the impact. The magnitude of significant impact is determined by mathematical calculation, analogy of similar activities, professional judgement and other methods, while the significance of the impact is determined based on seven

(7) important impact criteria namely:

(1) Total number of people to be affected.

(2) Impact dispersion area

(3) Impact duration

(4) Impact intensity,

(5) Number of other environmental components which will be

affected,

(6) The cumulative nature of the impact,

(7) Whether the impact is reversible or irreversible.

Based on the prediction of the magnitude of impact (M), the impact dispersion area, impact duration, impact intensity, and the number of other environmental components which will be affected as well as the cumulative nature of the impact will be identified as well as whether the impact is reversible or irreversible which will be the basis in determining the significance of the impact (I). Further, based on the laws and regulations and the six (6) important impact criteria the significance of the impact will be

PT Supreme Energy Muara Laboh 404 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW identified. As such, the magnitude (M) and the significance

(I) of each impact could be identified by providing the scale of magnitude and scale of significance within the range of 5 scales respectively.

The scale of magnitude of The scale of significance

impact (M) of impact (I)

. Scale 1 (trivial) . Scale 1 (Not

. Scale 2 (small) significant)

. Scale 3 (moderate) . Scale 2 (quite

. Scale 4 (large) significant)

. Scale 5 (extremely . Scale 3 (significant)

large) . Scale 4 (more

significant)

. Scale 5 (extremely

significant)

It is estimated that the activity plans and activity components of Muara Laboh PLTP Development will create significant impacts on the physicial-chemical, biological and socio-economic cultural environmental components, either at the construction, operation or post-operation stages. The exploration activity plan has been discussed in details in UKL-UPL, which at the same time constitutes an activity in the ANDAL preconstruction stage. Therefore this

ANDAL will be focusing more on the discussion of

PT Supreme Energy Muara Laboh 405 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW significant impacts during construction, operation and post-operation stages.

Further, the magnitude of the impact and the significance of the impact could be used to assess and prove whether each of the hypothetical significant impact is proven as a significant impact. The activity plan and activity component that create DPH in each activity stage are as follows:

5.1.1 Pre-Construction Stage

5.1.1.1 Land Clearance

1) Land Tenure

Nagari Alam Pauh Duo where Muara Laboh PLTP development activities are carried out was previously a tea plantation which was managed by PT Pekonina Baru. The tea plantation was used and utilized by the communities from various regions in Solok Selatan District to be processed to become paddy fields and fields/plantation. The land ownership is the Right to Use (HGU, Hak Guna Usaha) of PT Pekonina Baru which has been surrendered to the local government. Through the Solok Selatan District government, this land is transferred to SEML for Muara Laboh PLTP development plan.

During the land acqusition process for the purpose of constructing the PLTP, well pads and supporting facilities, compensation is provided to the communities who cultivated

PT Supreme Energy Muara Laboh 406 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the crops and fields in accordance with the laws and regulations applicable in South Solok District. However, there are members of the community who still claim that the land is customary land of the communities around the location of PLTP development. Based on the result of the field survey, all of the lands cultivated by the communities have been given compensation by SEML as facilitated by the regional government through the head of subdistrict, nagari and customary administration. Based on the ownership and control of the land against the land acquisition activity there are still some issues which need to be resolved by the proponent and local government; environmental quality during the land acquisition activity can be categorized as poor (scale 2) with the nature of impact categorized as more significant (scale 4).

2) Community Perception

The perception and attitude of the communities on the activity site related to socio-cultural factors, in particular cognitive structure of the physical and social environment. Good and right perception is required as a basis in forming the attitude which will lead to behavior.

The perception of the communities of Nagari Alam Pauh Duo and Pauh Duo Nan Batigo on the PLTP development by SEML against the land acquisition activity shows a positive response, because all lands which have been used as the

PT Supreme Energy Muara Laboh 407 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW location of geothermal development activities by SEML have been compensated.

Based on the local social cultural system, Minang communities have lands with communal land ownership system which is often called customary land. The land ownership for PLTP development location constitutes HGU land of a tea plantation which is already owned by the government and has not been maintained for a long time, and therefore the land has been used for quite some time by the communities originating from various areas in Solok Selatan; some even claimed that the land is customary land. Based on the perception and attitude of the communities against the land acquisition activities, for environmental quality it can be categorized as poor (scale 2) with impact categorized as more significant (scale 4) .

5.1.2 Construction Stage

5.1.2.1 Recruitment of Workers

1) Employment Opportunity

Labor requirement during the construction of PLTP Muara

Laboh fluctuates from time to time, in terms of quantity as well as quality (qualification) of expertise, in line with the project development stages. The works in the construction stage will be performed by contractors according to their respective field and competencies,

PT Supreme Energy Muara Laboh 408 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW including the workers who will carry out the works.

Therefore, PLTP Muara Laboh development activities will absorb workers whether SEML direct workers or those employed by the Contractors.

In overall, it is estimated that PLTP Muara Laboh development could absorb 2,000 - 2,500 workers with various fields and qualifiations and many of them are originating from the location in the vicinity of the location of activities. The absorption of workers will create impacts of the expansion of employment opportunities in the study area for one scale unit so that the environmental quality improves from scale 2 to scale 3 (medium).

In terms of the significance of the impact, there are many residents affected by the PLTP construction activities; impact dispersion is extensive; impact duration is about 2

– 3 years; other environmental components affected are few, the impact is cumulative or has multiplier effect and the impact will be reversible when the employment of the workers is terminated. Therefore it can be concluded that the impact of employment opportunity is under the category of moderate (scale 3) with the impact significance under the category of more significant (scale 4)

2) Business Opportunity

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The plan for labor recruitment activities at the construction stage will open new business opportunities or grow the existing businesses for the communities who live around the project site. Business opportunities could be in the form of trading business and restaurants to meet the need of the workers. The magnitude of business opportunity impact is one scale unit or environmental quality will increase from very poor (scale 1) to poor (scale 2).

There are many people that may be affected; the impact will be dispersed and the impact duration is moderate; many other environmental components are affected; the cumulative nature of the impact is low and the impact will be reversed. Therefore, the level of impact significance is classified as significant or scale 3. Therefore it can be concluded that this activity will be able to change the environmental quality to poor (scale 2) and the impact significance is classified as significant (scale3).

3) Community Income

The level of community income is categorized as low; in the baseline it is expected that it will experience an increase during the construction stage of Muara Laboh PLTP development project. The source of increased income of the communities is originating from labor recruitment activities at the construction stage, whether by SEML as the Proponent or implementing contractor, of 2.000 to

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2.500 persons with various qualifications in accordance with the construction activity stage. The amount of increased income is estimated as 1 (one) scale unit therefore the quality of community income increases from scale 2 (poor) to scale 3 (moderate).

In terms of significance of impact, there are many residents affected and the impact will disperse, the impact duration is moderate, namely during the construction stage.

There are many other environmental components affected, for example the reduced pressure on the forest area due to the residents’ economic activity, the increased social status of some of the residents, etc. The impact will be accumulated through multiplier effects and will be reversed. Therefore the impact significance is under the category of extremely significant (scale 5). Thus the labor recruitment activity during the construction period may change the environmental quality to moderate (scale 3) and the impact significance is under the category of extremely significant (scale 5).

4) Social norms and values

The labor recruitment activity at the construction stage of

PLTP development is originating from various areas outside

Solok Selatan and even West Sumatra Province. The recruited labor that has special capability and expertise

PT Supreme Energy Muara Laboh 411 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW generally are from outside PLTP development area that brings different values and customs. While the labor that do not have mining expertise are from local residents who have known each other and understand the local social cultural condition. The labor recruitment from communities outside PLTP development area certainly bring their own cultural values which are understood by the communities because they are also people originating from the east, thus it facilitates the process of adaptation with the surrounding environment, this is because the difference of cultural values and social norms can be said universally the same as they also come from the territory of Indonesia.

Based on the labor recruitment, the change of community values and social norms for environmental quality could be categorized as moderate (scale 3) with the signficance of impact classified as moderate (scale 3) .

5) Community Perception

Labor recruitment at the PLTP development construction stage creates various perception and attitude of the communities. The perception and attitude of the communities of the labor recruitment may create various interpretations of the community on an activity. In this study activity, it is seen that the response, attitude and views of the community on labor recruitment tends to be negative. This condition has resulted in various

PT Supreme Energy Muara Laboh 412 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW demonstrations related to labor recruitment. It is learned that many local workers such as from Muara Labuh, Hulu

Suliti, Pakan Rabaa and other areas have been hired through recommendations from certain parties. Workers from the communities in PLTP activiity site such as Jorong Pekonina,

Sapan Sari, Kampung Baru, Pinang Awan, Taratak Tinggi, Liki dan Jorong Ampalu are rarely hired and difficult to be hired. In addition, some community groups feel that labor recruitment process is not transparent and does not practice good selection process.

This impact becomes significant due to the perception and attitude of the communities of labor recruitment during construction stage. During the performance of the activities, if things that they receive, understand, think, feel and desire are not according to what they perceive at the early stage of PLTP development, the tendency is that there will be a change of perception to a negative one which if not managed will spread to various layers of society. In such situation, the impact which is initially good will change to moderate (scale 3) up to poor (scale

2).

Thus the termination of employment during the construction results in the change of community perception to become poor (scale 2) and the impact significance is classifed as significant (scale 3) .

PT Supreme Energy Muara Laboh 413 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

5.1.2.2 Termination of employment

1) Work opportunity

The termination of employment activity is conducted because the construction stage has been completed and it will reduce the environmental quality from scale 3 to scale 2

(poor). In terms of impact significance, the number of residents affected are many and extensively dispersed and for a long period, but the other environmental components affected are not many, not accumulated and irreversible.

Thus the impact significance is under the category of significant (scale 3). Therefore the termination of employment during construction may change the environmental quality to poor (scale 2) and the impact significance is classified as significant (scale 3).

2) Business Opportunity

The termination of employment activity at the construction phase will result int reduced environmenetal quality form scale 2 to scale 1. In terms of the significance of impact the number of people affected is high, the impact will spread and last for a long time, the other environmental components affected are high. The impact is neither accummulated nor reversed, therefore the level of impact significance is under the category very significant or scale 4. Thus the termination of employment of operational

PT Supreme Energy Muara Laboh 414 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW workers may change environmental quality to very poor

(scale 1) and impact significance is classified more significant (scale 4).

3) Community Income

At tne end of the construction stage, the quality of community income is expected to decline as the contractors will terminate the workers’ employment. Thus, the scale of quality due to community income will again change from moderate (scale 3) to poor (scale 2).

It is estimated that the residents affected by the declined income of the community is high and it is spreading.

However, the impact will not last long because the works will be continued with the PLTP operation stage. The other environmental components affected includes physical and social components. This impact will be worse if the period of interval between construction stage and operation stage lasts longer than normal. The impact of income reduction is cummulative and irreversible if it is not followed by an appropriate environmental management. Thus the impact significance scale for reduced income due to the completion of construction is under the category of ‘very significant’ (scale 5). Thus the termination of employment at the operation stage may change environmental quality to poor

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(scale 2) and impact significance is classifed as

‘extremely significant’ (scale 5).

4) Social values and norms

The lay-off or termination of employment at the construction stage of Muara Laboh PLTP development activities in Nagari Alam Pauh Duo has not affected the values and norms of the local communities. This condition is due to the social interaction between the local communities and geothermal workers is relatively less intensive and could be said rare, because the workers are living far from the community’s residential area and only local workers who interact with the workers outside the study area. It could be said that the termination of employment process along with the change of communities’ change of values and norms has not affected the community’s social order. From the above description the termination of employment can be said have less influence on the change of social values and norms of the communities it can be said that it is not affected that much, and thus the cultural values and norms could be maintained, environmental quality is under the category of ‘good’ (scale 4) with the impact being significant (scale 3).

5) Community Perception

PT Supreme Energy Muara Laboh 416 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

The termination of employment activity due to the completion of construction stage will reduce environmental quality from scale 3 to scale 2 (poor). In terms of the level of impact significance, the residents affected are high and spreading extensively and for a long time, but the other environmental components affected are not many, not accumulated and irreversible. Therefore the level of impact significance is under the catetogory of

‘significant’ (scale 3). Thus the activity of termination of employment during construction against the change of community perception is poor (scale 3) and the impact significance is classified as significant (scale 3).

5.1.2.3 Production Well Drilliing Activities

The planned activities plan and the components that creates significant impact in the construction stage are among others drilling and well production test activities. During this 1st stage, in order to meet the initial production target of 70 MW using dual flash steam cycle technology, it is necessary to have an additional drilling of three (3) production wells at Wellpad ML-A and it shall be added with an additional drilling of a number of production and injection wells.

During the geothermal drilling process activity it is estimated that the following impacts will occur:

PT Supreme Energy Muara Laboh 417 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

 Noise coming from the engine, rotational transmission

and rotational motion of drilling equipment.. The noise

propagating could only be heard in the wellpad working

area and its vicinity; thus the impact of noise during

the drilling is classified as ‘less significant’.

 Formation water with high TDS (Total Dissolved Solid)

which flows together with the mud and is contained in

the mud pit, further it is flows to the sediment pond.

This drilling waste water is further delivered to the

separator station and together with the brine is

returned again to the injection well. Therefore the

drilling waste water creates less significant impact on

the environment.

 Drilling mud that has been used repeatedly and no longer

meet technical specification should be disposed of as

used drilling mud. Similarly with drilling waste water,

the used drilling mud is mixed with the brine

proportionally, then it is injected to the earth through

the injection well. The drilling mud may also be

utilized as construction material mixture or in the

landfill at the work location. Therefore the used

drilling mud will create less significant impact on the

environment.

PT Supreme Energy Muara Laboh 418 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

 One of potential hazards which is quite high in

geothermal well drilling activity is H2S gas, which,

even in a certain concentration, could cause death.

Therefore every Rig is equipped with 4 units of H2S

sensors installed at 4 different locations identified as

H2S gas dispersion area. The H2S sensor could detect H2S

gas with the content above 200 mg/Nm3 when the sense of

smell is no longer sensitive to detect the smell of H2S

gas. A warning alarm will be heard when in the Wellpad

area it is detected that there is H2S content of 20 ppm

or more.

5.1.2.4 Well production testing activities

Production tests for wells which are just drilled shall be conducted after heat recovery is confirmed by thermal gradient survey. The purpose of production tests is to estimate the well production and to make well production curve / deliverability. The wells will be opened at different valve positions in order to obtain a stable well production curve. This production curve functions as a base line and change of production curve in the future should be compared to this initial curve. During the production test, the temperature pressure will be measured to determine the feed zone depth location and to provide a profile in the condition of open well/in production.

Production test process is carried out by channeling wet

PT Supreme Energy Muara Laboh 419 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW steam through a Separator and separate dry steam flows to the Rock Muffler or Atmospheric Flash Tank (AFT) as a noise reducer.

Thus, the principle of well production testing is that wet steam is separated in the Separator, then the dry steam flows through a Rock Muffler or AFT then is released into the atmosphere. Therefore during the process of production testing H2S emissions will occur from the Rock Muffler.

Schematically, the flow diagram of the production test process is presented in the following figure.

UapWet basah steam

H 2S Gas + CO2 + Vapor SEPARATOR Gas H2S + CO2 + uap air

KEPALAWELLHEAD SUMUR

UapDry steamkering

Air asin panas ROCKRock MAFFLER Muffler (Brine) CondensateKondensat

THERMAL POND

INJECTIONSUMUR REINJEKSIWELL

RESERVOIR

Figure 0-1 Flow Chart of Well Production Test

1) Handling brine during production test

PT Supreme Energy Muara Laboh 420 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Brine formed shall be channeled to Weir box and then from

Weir box hot brine water is sent to the Thermal Pond, which finally will be channeled again to the injection well.

Thus the geothermal field creates waste water in the form of brine and it has become geothermal field standard (SOP) that the brine should again be returned to the earth

(reservoir) through the injection wells. Therefore the brine does not give any impact on the environment.

2) Prediction of emission and dispersion of H2S gas during

production test

During well production test, a significant impact may be created when the steam is released to the atmosphere through the Rock Muffler or AFT. Geothermal wet steam having an NCG (Non Condensable Gas) content, is particularly composed of H2S gas and CO2 which also flows in the geothermal steam. During production test, wet steam is released into the atmosphere through the Rock Muffler or

AFT. Therefore during the production test, in addition to creating waste water in the form of brine, it could also create H2S and CO2 gas emission which is mixed with water steam. Thus the plan for exploitation well production test activity creates an impact on the quality of air and will create noise , H2S and CO2 gas emission The release of vapor together with H2S gas and CO2 into the atmosphere

PT Supreme Energy Muara Laboh 421 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW through Rock Muffler or AFT can be presented in the following figure of Rock Muffler:

Figure 0-2 Release of Steam to the Atmosphere through Rock

Muffler

H2S gas emission and CO2 occurred as the gases are released to the atmosphere from Rock Muffler or AFT at the time of well production test is performed. H2S gas is toxic gas which in the content higher than 400 mg/Nm3 with a certain period of exposure may cause fatality.

a. Prediction of H2S gas emission at the time of

production test

Long term production test process on production wells will last for ±30 days respectively. During the production test, Rock Muffler or AFT will release steam and gas that has NCG (Non Condensable Gas) content in the form of H2S gas and CO2 to the atmosphere which will later be

PT Supreme Energy Muara Laboh 422 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW dispersed in the ambient air so that it will create impact on the environment.

ML-A1 is the most productive well which is able to produce steam equal to 25 MW. Currently there is one (1) well in

Wellpad ML-A and it is planned to conduct drilling for additional production wells. Thus from the wells in

Wellpad ML-A the steam that could be produced is as follows

 Existing well ML-A1 with HP steam production capacity of

25 MW. Two phase steam flow rate is 140 kg/s at the

temperature of 2350C with an enthalpy of around 1,500

kJ/kg.

 Additional 3 to 4 ML-Ax new wells with HP steam

production capacity equal to 30 MW. Two phase steam flow

rate is 93 kg/s at the pressure of well head of 10 bara

and enthalpy ranging between 1,200 - 2,000 kJ/kg.

On the other hand ML-H1 well head is classified as less productive which produces a small amount of HP steam or even LP steam. Therefore from Wellpad ML-H it could create steam in the following amount:

 Existing well ML-H1 with LP steam production capacity

equal to 5 MW. The two-phase steam flow rate is 70 kg/s

with an enthalpy ranging between 970 - 1040 kJ/kg.

PT Supreme Energy Muara Laboh 423 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

 Additional three (3) ML-Hx new wells with HP steam

production capacity equal to 10 MW. The two-phase steam

flow rate from each well is 118 kg/s at the pressure of

10 bara with an enthalpy ranging between 1,100 - 1,200

kJ/kg.

If the pressure of wellhead on the average is 10 bara and the steam coming out from Rock Muffler is at the pressure of 2 bara and the NCG content is ranging between 0.5 - 0.7

% of maximum weight, the H2S gas emission during the production test is as follows:

Table 0-1 Percentage of Brine Formed from Wellpad ML-A and

ML-H

Rock Parameter Unit Well Head Muffler

Pressure bara 10 2

Steam Entropy Btu/lb/oF 1,5720 1,7013

Water Entropy Btu/lb/oF 0,5122 0,3666

Brine % 90,3 Brine percentage percen tage formed during the production test with the assumption that the condensation process takes place isentropically

(fixed entropy) is as follows:

PT Supreme Energy Muara Laboh 424 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Brine flow rate (%) = (0.5720 - 0.3666) x 100 /

(1.7013 - 0.3666) = 90.,3 %

Steam from Muara Laboh field has an average NCG content of

0,6% of weight and therein there is an average 118 mg/kg of

H2S gas,therefore H2S gas emission during the production test is estimated as follows:

Table 0-2 H2S Gas Emission during Well Production Test

Production Parameter Unit Test

Steam flow rate kg/s 93

Brine formed % 90,3

Brine flow rate kg/s 84,0

Steam released to kg/s 6,3 the atmosphere

NCG content in % 0,6 steam

NCG flow rate kg/s 0,04

H2S content in NCG mg/kg 118

H2S flow rate mg/s 4,48

Specific volume Nm 3/kg 0,1799

Steam flow rate Nm 3/s 1,138

3 H2S gas emission mg/Nm 3,9

Emission Standard mg/Nm3 35

PT Supreme Energy Muara Laboh 425 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

H2S*)

*) Emission Standard for H2S: Regulation of the State

Minister of the Environment No.21 of 2008

In the condition where H2S is excessive it is estimated

3 that it could only achieve H2S emission gas of 12 mg/Nm .

According to Regulation of the State Minister of the

Environment No. 21 of 2008, Appendix V – the Immovable Source Standard for the PLTP that can be applied for the

3 production test is 35 mg/Nm . Therefore, H2S gas dispersion during the production test can be controlled under the

PT Supreme Energy Muara Laboh 426 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Emission Standard. In other words the impact on the ambient air qualitty resulted from the production test is less significant.

b. Prediction of H2S gas in ambient air during production

test

Gas emission coming out of Rock Muffler will be dispersed in the atmosphere depending on the direction and speed of wind at that time. The gas dispersion pattern and particles in the atmoshephre can be determined based on a mathematical algorithm, among others by options of using box model, Gaussian model, Eulerian model, and Lagrangian model. Here, the gas dispersion pattern from Rock Muffler emissions uses Gauss formula. Based on Gauss formula gas concentration and particles on the ground level could be estimated by using the following mathematical model :

Where:

C = concentration of pollutant at ground level, µg/m3

Q = pollutant emission g/s

U = average wind speed, m/s

σy = deviation standard in the plume horizontal, m

PT Supreme Energy Muara Laboh 427 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

σz = deviation standard in plume vertical, m H = effective heightStack, m x = Distance of dispersion from Stack in the same direction

as x axis, m y = Distance of dispersion perpendicular to centerline, m e = natural number = 2,71828

The Rock Muffler actually functions as noise control, but at the same time it also functions as stack for gas dispersion. Therefore the design of the height and diameter of the Rock Muffler Stack is determined by natural draft due to the difference of steam pressure and ambient atmosphere pressure. However to calculate maximum gas dispersion, the height of Rock Muffler Stack is the physical height of the stack plus the height of imaginary stack,

Hstack = Hfisik + ∆H

The height of physical stack (Hfisik) is the height of the stack measured physically, while the height of imaginary stack (∆H) is the additional height of plume as determined by plume rise velocity. The height of this imaginary stack may be determined by Davidson & Bryant formula as follows:

PT Supreme Energy Muara Laboh 428 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Vs 1.4 ∆Ts ∆H = ( ) ( 1 + ) T u

Therefore the height of imaginer Stack is influenced by the speed of gas coming out of stack (vs), wind speed (u), temperature of gas coming out of stack (Ts) and ambient air temperature (T). With the height of Rock Muffler Stack of

10 m and stack diameter of 2,7 m, then the height of physical stack is relatively the same as the height of imaginary stack.

Based on H2S gas emission exposed through the Rock Muffler during a production test, the gas dispersion in the atmosphere will follow the Gauss gas dispersion model. The pattern of H2S gas dispersion in ambient air according to

Gauss formula is presented in the following chart:

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3,0 3

g/Nm BML μ 2,5

2,0 S ambien, ambien, S 2 S, µg/NmS,

2 Maksimum

1,5 Kadar H Kadar

1,0 Content of ambient H 0,5 Normal 0,0 0 10 20 30 40 50 60 70 80 90 100 110

DistanceJarak of dispersi H2S Dispersion H S dari from Rock Rock muffler Muffler stack, Stack, m m 2

Figure 0-3 Pattern of Ambient H2S Gas Dispersion During

Production Test

During production test, H2S gas dispersion in ambient air is ranging between 1 - 3 µg/Nm3. According to Decision of the State Minister of the Environment No.: Kep-50/

MENLH/11/1996 on Odor Level Standards, the Odor Level

3 Standard for H2S gas is 0.02 ppm or 28 µg/Nm . Thus, during the production test, the maximum H2S gas dispersion is 3

3 ; µg/Nm therefore it does not create H2S. gas odor.

Pursuant to Regulation of the Minister of the Environment

3 No. 21 of 2008, H2S emission standard is 35 mg/Nm , thus the magnitude of the impact on air quality during well production test is presented in the following impact scales:

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Impact magnitude scale (M):

H2S gas Impact Magnitude (M) Scale Value emission

3 H2S gas emission < 5 mg/Nm 1 Trivial

during production test 3 5 – 15 mg/Nm 2 Small is 9,5 mg/Nm3, 3 15 – 25 mg/Nm 3 Medium therefore the 25 35 mg/Nm3 4 Large magnitude of the –

impact equals to scale > 35 mg/Nm3 5 extremely

2 large

Further the determination of the significance of the impact shall refer to the laws and regulations and seven (7) significant impact criteria. The existence of residential housing far from the wellpad location, therefore it facilitates the implementation of production test, without disturbing the comfort of the residents. The legal ground utilized as a restricting factor is Decision of the State

Minister of the Environment No. 50 of 1996 on Odor Level

Standard which determines Odor Level Standards for H2S is

28 µg/Nm3 as the maximum (threshold). Further the minimum threshhold determined as the minimum threshold is 0.0005 ppm or 1 µg/Nm3. Further, based on the restriction, the significance of the impact is also declared under 5

PT Supreme Energy Muara Laboh 431 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW significant impact, the result is as presented in the following description:

Scales of the signifcance of the impact (I):

Significant impact Significant impact No criteria nature (I)

(1) Total number of people Operator drilling

affected

(2) Impact dispersion area Area well pad

(3) Duration of impact 10 days

(4) Intensity of impact Low

(5) Number of environmental None

components

(6) Impact cummulative Not affected

nature

(7) Reversible or Not affected

irreversible

The significance of Ambient Scale Value impact

3 H2S gas dispersion in < 1 µg/Nm 1 not

the normal ambient air < significant

4 µg/Nm3 and maximum < 8 1 – 10 2 quite

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The significance of Ambient Scale Value impact

µg/Nm3 far below Baku µg/Nm3 significant

Mutunya 28 µg/Nm3. 10 – 19 3 Significant Dispersion within µg/Nm3 working environment, so 19 – 28 4 More that it is equal to the µg/Nm3 significant impace scale 2 > 28 µg/Nm3 5 Extremely

significant

In the planned well production test activities, H2S gas impact is only dispersed within the project boundary i.e. in the wellpad area and is not spreading to the residential area. Therefore the dispersion of H2 gas impact is within the working environment so that work environment threshold value (NAB, Nilai Ambang Batas) is applicable. Thus, the planned well production test activities create a small impact (scale 2) and the impact is quite significant

(scale 2).

c. Prediction of CO2 gas emission load

NCG contains CO2 and H2S gas, hence in addition to creating

H2S, it also creates CO2 emission. CO2 gas does not directly has an impact on the environment, but it has an impact on the global climate. In other words, CO2 emission is not

PT Supreme Energy Muara Laboh 433 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW an important environmental parameter, so that in this ANDAL it is sufficient to consider the CO2 emission load and its constribution nationally. However, due to the global environmental issue regarding the global concern about global warming due to the high greenhouse gas emission

(CO2, CH4, N2O and HFC) from the advanced industrial countries, all countries should reduce CO2 emission load.

Based on the prediction from various national as well as international sources, CO2 emissions in Indonesia are ranging between 400 and 500 million tons of CO2 per annum.

Many agencies have conducted a review to predict CO2 emissions in Indonesia, however the one considered most realistic is the result of the study carried out by New

Straits Times (1995), which is shown in the following table.

Table 0-3 Projected CO2 emissions in Indonesia

CO2 emission in

Year million

ton/year

1988 111

1995 172

2000 220

2005 301

PT Supreme Energy Muara Laboh 434 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

2010 382

2015 533

2020 684

During the production test, the NCG released to the atmosphere is 2% from the wet steam flow rate and 90% of which is CO2 gas. With the wet steam flow rate of 34 kg/second and the duration of the well production test is

30 days, the CO2 emission load which is released to the atmosphere is as follows:

Wet steam flow rate : 34 kg/second

NCG content : 2 %

CO2 content in NCG : 90 %

Duration of production test : 30 days

Total number of production wells : 27 wells

CO2 emission equivalent to : 42,93 ton/year

National contribution : 0 % (trace)

CO2 emission during the production tests of 27 production wells will contribute to the national CO2 emission load of 0% (trace) due to the trivial CO2 emission load. The result of research on primary tropical rain forest shows that primary forest could absorb CO2 as much as 18.35 ton/ha/year. Thus = CO2 emission of 42,93 ton/year may be absorbed by primary forest of 77,4 hectares. Yet the area

PT Supreme Energy Muara Laboh 435 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW of protection forest in Solok Selatan District is more or less 84,079 hectares, which is more than sufficient to absorb such emission and dispersion of CO2 gas. d. Prediction of noise during production test.

During the well production test, a high level of noise may occur, which could reach level of noise of 124 - 134 dB(A) due to the steam blow off. In order to reduce the noise during the production test, the noise is controlled in the

Rock Muffler or AFT. In the Rock Muffler or AFT, pressure and temperatureof the vapor which are hiigh will be suddenly reduced (flashing); thus the noise will be controlled and part of the steam will change into liquid phase. The level of noise could be controlled about 85 -

100 dB(A). The noise propagation from the Rock Muffler or

AFT in the half-open field could be declared with the following equation:

Lr = Lo - 20log r - 8

Where:

Lr = Level of noise in the distance of r meter from the

source of noise, dB(A)

Lo = Level of noise in the source of noise, dB(A) r = distance form the source of noise, meter

PT Supreme Energy Muara Laboh 436 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Based on the said formula the noise propagation pattern during the production test compared to at the time of drilling is as follows:

125

115 BML

105

85 Uji produksi

65 Bising drilling & uji produksi, dB(A)produksi, uji & drilling Bising 55

Noise from drilling & production testing, dB(A) dB(A) testing, production & drilling from Noise 35 Drilling

25 1 20 40 60 80 100 120 140 160 180 200

JarakDistance rambatan of noise bising propagation, dari wellpad, m m

Figure 0-4 Pattern of Noise Propagation during Drilling

and Production Test

At the time of drilling, noise propagation achieves the

Noise Level Standard of 55 dB(A) in the distance of about

100 m from the drilling rig. However, on the contrary when production test is carried out without Rock Muffler or AFT the noise propagation can be heard in the distance 1 km from the wellpad position. Therefore, the existence of Rock

Muffler or AFT as noise reduces becomes important in order for the noise propagation could be reduced up to a maximum of 250 m from the position of Rock Muffler or AFT. The nearest residential area is located 2 km from the wellpad,

PT Supreme Energy Muara Laboh 437 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW therefore the noise during drilling or during production test do not have a significant impact on the residential area.

Based on the prediction of impact of noise on the drilling and production test activities, the magnitude and significance of the impact is presented in the following impact scale:

Scale of magnitude of impact (M):

The magnitude of impact refers to the noise limit is considered safe for health and environmental comfort, in accordance with the Circular of the Minister of Manpower

No.SE.01/MEN/1978, Regulation of the Minister of Health No.

718 of 1987 and Decision of the State Minister of the

Environment No. 48 of 1996. Based on the provisions the magnitude of noise level which can be tolerated is 55 - 85 dB(A), to that end the scale of magnitude of impact can be made as follows:

Magnitude of Impact (M) Interval Scale Value

During drilling, noise < 55 dB(A) 1 Trivial

at the level of 10 m 55 – 70 dB(A) 2 Small from the source of 70 – 85 dB(A 3 Moderate noise = 74 dB(A), while 85 – 100 dB(A 4 Large

PT Supreme Energy Muara Laboh 438 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Magnitude of Impact (M) Interval Scale Value

during production test > 100 dB(A) 5 Extremely

it could reach 98 Large

dB(A). Thus the scale

of magnitude of impact

of production test is

Further the determination on the significance of the impact shall refer to the laws and regulations and the seven (7) criteria of significant impact. The significance of the impact is also declared in 5 scales of significant impact which refers to the provisions of ISO (International

Standardization Organization) and Decision of the State

Minister of the Environment No. 48 of 1996. According to

ISO, the threshold of normal hearing is < 25 dB(A), while according to the Decision of the State Minister of the

Environment No. 48 of 1996 the comfort of residential area is achieved if the level of noise is < 55 dB(A). Based on the threshold, the interval of noise level is between 25 dB(A) up to the worst level 60 dB(A) as a significant impact. The scale of significance of the impact of noise is as presented below:

Scale of significance of impact (I):

PT Supreme Energy Muara Laboh 439 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Criteria of significant Significance of impact No impact (I)

(1) Total number of people Drilling Operator

affected

(2) Impact dispersion area Working environment 250

(3) Impact duration Initial noise condition,

3 months

(4) Impact intensity Low

(5) Number of environmental None

components

(6) The nature of None

cummulative impact

(7) Reversible or None

irreversible

Significance of impact Interval Scale Value

Noise is only < 25 dB(A) 1 Not

impacting on drilling significant

operator s and no 2 25 – 40 Quite residents are affected dB(A) significant by the noise therefore 40 – 55 dB(A 3 Significant the impact scale = 1 55 – 70 dB(A 4 More

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Significance of impact Interval Scale Value

significant

> 70 dB(A) 5 Extremely

signficant

Without Rock Muffler or AFT noise propagation during production test may reach 1.000 m, but with Rock Muffler atau AFT as reducer, noise propagation only reaches a radius of 250 m. In the radius of 250 m there is no residential area, while the nearest residential area with the wells is Wellpad C area i.e. Kampung Baru with a distance of approximately 500 m. Thus within a radius of

250 m is a working environment and not a residential area, therefore the noise in the residential area is the same as the initial noise condition of the environment. Therefore, the drilling and production test activity plan is predicted to create quite significant impact on the environmental comfort and health of the communities in Kampung Baru who live within the radius of + 1.000 m from the Wellpad C location. Based on the above description it can be stated that the noise level impact is moderate (scale 3) and the significance of the impact is classified as less significant (scale 1).

3) Public Health

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During the operation stage, drillings of new wells and construction of new wellpads will be conducted. Certainly there will be an increased concentration of CO2 and H2S in the air and liquid waste. The interview conducted previously with the communities living close to the project site, in particular the communities of Jorong Taratak

Tinggi, revealed that the communities felt disturbed by the smell of sulphur around the residential area, this is even more so during rainy season. However, at prsent the communities in Taratak Tinggi no longer smell H2S. It is predicted that the smell of sulphur gives more impact during the exploitation activities in the production as well as maintainance of production well.

A geothermal power plant is a type of power plant which is environmentally friendly, because the waste produced from the power generation process is only in the form of warm water (+500C) which is mostly directly re-sent into the soil to maintain the fluid supply that has been utilized.

By this method, the potential environmental pollution by generation waste and its effects on the surrounding environment is minor. The liquid waste from the drilling remains in the mud pond and water pond will be re-sent to the earth through injection wells if it is not used for drilling activities. Grey water as domestic liquid waste will be processed in a waste water treatment system in

PT Supreme Energy Muara Laboh 442 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW order to meet the standard, while the black water waste will be channeled to septic tank. Since the communities are concerned with lacking source of clean water as a result of drilling activity and deforestation by another party in the river upstream area, it is predicted that the environmental impact during the activity at the operation stage is classified as ‘poor’ (scale 2)

The declining status of public health is the derivative impact of the activity/project and it is negative. This impact is due to the production, injection well drilling activities and production well test and prodution well maintenance at the post-construction stage (operation). As a result of the declining status of public health it is predicted that the total number of people affected is relatively large, therefore it is categorized as

‘significiant’, and having quite extensive dispersion impact and therefore it is classsified as ‘significant’. The intensity and impact last long (significant). The environmental components affected is not limited to public health but will also affect the other environmental components. However the impact is not cummulative and recoverable (not significant). The impact is irreversible so that the impact is not significant with the degree of significance classified as ‘more significant’ (scale 4).

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5.1.2.5 Land Clearing Activities

1. Erosion and Sedimentation

The project area that has a slope of 25 - 50% needs to be protected in order to be able to give benefit as to protect the area thereunder. There is some concern that the soil works in the sloping area could form a slightly open area which is potentially prone to erosion. Therefore the impact is significant due to the erosion as a result of the planned land opening activity in the area with a sharp slope for the project site during construction.

Most of the activities have been carried out in the exploration stage in accordance with UKL-UPL documents i.e. the construction of access road to the steam field and some of wellpad areas. While for the additional seven (7) and the access road section to the additional wellpads there is no activity at all.

Most of the project area is a dry agricultural area and the remaining area is in the form of paddy fields and shrubs.

As such the dry agricultural area and shrubs with an area of tens of hectares is an open area which is more prone to erosion compared to the opening of project area with area of tens of hectares in stages. The PLTP area is a dry agricultural area, while wellpad area and the access road section are mostly shrubs. The predictiion of the magnitude

PT Supreme Energy Muara Laboh 444 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW of soil erosion rate in the land opening activity in the activity site which is prone to erosion is presented in the following table:

Table 0-4 Rates of Erosion and Sediment Charge

Erosion

Open Area Erosion Critical Location (ha) (ton/ha/year) Threshold

(ton/ha/year)

PLTP Area 7,5 27,8 9

Wellpad Area 4 21,6 9

Road section 3 20,1 9

Erosion critical threshold : Government Regulation No.150 of 2000

The PLTP development project area is considered prone to erosion, even though the project land opening activity is considered to be only slightly prone to erosion. Based on the prediction of the impact of project site land opening activity due to erosion, the magnitude and significance of impact are presented in the following scales of impact:

The scale of magnitude of impact (M):

The magnitude of impact of erosion rate shall refer to

Government Regulation No.150 of 2000 regarding erosion critical threshold. The project site with the depth of soil

PT Supreme Energy Muara Laboh 445 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW of more than 150 cm, the erosion critical threshold is <9 ton/ha/year. Further based on the erosion critical threshold the scale of the magnitude of erosion impact is presented as follows:

Critical Magnitude of threshold Scale Value impact (M) (ton/ha/year)

Project site < 3 1 Trivial

erosion rate is 3 - 6 2 Small

ranging between 6 - 9 3 Moderate

20,1 - 27,8 12 – 15 4 Large ton/ha/year, thus > 15 5 Extremely

the magnitude of large

impact is

classifed as

extremely large,

scale 5

Accoding to the provision, the magnitude of erosion is considered moderate (quite large) if the erosion rate is >9 ton/hectare/year and is classifed as ‘extremely large’ if the erosion rate is >15 ton/hectare/year.

Further, the determination on the significance of impact shall refer to the laws and regulatins and seven (7) significant impact criteria. The significance of the impact

PT Supreme Energy Muara Laboh 446 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW is also described in 5 scales of significant impact which refers to the provisions of Erosion Rate Classification pursuant to the Decision of Directorate General of

Reboisation & Rehabilitation of the Ministry of Forestry

No. 041/Kpts/V/1998, as presented in the following table:

Table 0-5 Erosion Rate Classification

Erosion rate No. Erosion class (ton/ha/year

1 < 15 Normal

2 15 - 60 Slight erosion

3 60 - 180 Moderate

4 180 - 480 Severe

5 > 480 Extremely severe

Then based on the erosion rate classificatin, the significance scale on the erosion impact is presented as follows:

Scale on the significance of impact (I):

Criteria of significant Significance of impact No impact (I)

(1) Total number of people None

affected

(2) Impact dispersion area Well pad, ruas jalan dan

PT Supreme Energy Muara Laboh 447 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Criteria of significant Significance of impact No impact (I)

area PLTP

(3) Lamanya dampak During soil works

(4) Impact intensity Low

(5) Number of environmental Physics- chemical

components

(6) Nature of cumulative Non-cumulative

impact

(7) Reversible or irreversible

irreversible

Erosion rate Significance of impact Scale Value (ton/ha/year)

erosion rate of < 15 1 Insignificant

project site is 15 - 60 2 quite

ranging between 20,1 significant

and 27,8 ton/ha/year 60 - 180 3 Significant

is classified as minor 180 - 480 4 More

erosion, so that it is significant

classified as quite > 480 5 Extremely

significant, with significant

scale 2

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The provisions of Government Regulation No.150 of 2000 are considered strict, therefore the erosion rate of >15 ton/hectare/year is declared as having a quite significant impact. The PLTP Muara Laboh Project only opens a relatively narrow land so that the impact of the erosion is not classified as significant but requires further management. Moreover, the impact of land opening activity against erosion and sedimentation is in the condition extremely large (scale 5) and the significance of impact is classified quite significant (scale 2).

2. Surface Water Quality

Water run-off rate may bring sediment to flow to the river causing concerns that it would give further impact of the declining physico-chemical and biological quality of the river. If erosion occurs, there is concern that the sediment charge is carried along by the water run-off and goes to the river and causes concerns that it will make the water turbid and affect the quality of river water

(physics-biology), and possibly sedimentation occurs at the bottom of the river. The upstream part of the river passing through the project area is relatively good and thus a slight change to the water quality, for example due to the turbidity of the river water, could create a significant impact. Therefore in anticipation of erosion, along the

PT Supreme Energy Muara Laboh 449 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW access road and water run off area of wellpad, a water trench is constructed with the catch pond at its end, to prevent turbidity of the river.

The forecast about the impact of soil works during constrution on the quality of river water is presented below: a) Without management of erosion and sediment charge

Without good management of erosion, the sediment charge that goes to the river may reach a maximum of 388 mg/L, meaning it is far exceeding the standard of 50 mg/L. The sediment charge may give rise to the significant impact on the river water quality. The sediment charge load before management is presented in the following table.

Table 0-6 Sediment charge Prior to Management

Run Sediment Open Quality Activity Erosion Off charge mg/L Area Standard Location (ton/ha/year) Rate (ha) Minimum Maximum (mg/L) (m3/s)

PLTP Plan 7,5 27,8 0,17 97 388 50

Wellpad 4 21,6 0,12 59 234 50 Area

Road 3 20,1 0,10 50 198 50 Section

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b) With management of erosion and sediment charge

If erosion is not well managed, the sediment charge which will enter the river will be far exceeding the standard, i.e. varying between 50 - 388 mg/L. Therefore it is necessary to manage the erosion in order that the sediment charge entering the river is <50 mg/L. The greatest sediment charge load is that originating from PLTP area, but after it is managed there is remaining sediment charge load of 78 mg/L. After the earthworks have been completed, the sediment load will reduce to <50 mg/L. The prediction of sediment charge after it is managed is presented in the following table:

Table 0-7 Sediment Charge after Being Managed

Sediment Sediment

charge, mg/L charge, mg/L Impact Activity Standard Prior to After remains Locatin (mg/L) management management (mg/L)

Minimum Maximum Minimum Maximum

PLTP 97 388 <50 78 28 50 Plan

Wellpad 59 234 <50 47 0 50 Area

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Sediment Sediment

charge, mg/L charge, mg/L Impact Activity Standard Prior to After remains Locatin (mg/L) management management (mg/L)

Minimum Maximum Minimum Maximum

Road 50 198 <50 40 0 50 section

Based on the prediction of impact of the project site land opening activity on erosion, the surface water run off and sediment charge load, the magnitude and significance of the impacts are presented in the following impact scale:

Scale of magnitude of impact (M):

The magnitude of the impact of surface water run-off that brings erosion sediment charge shall refer to the provisions of Government Regulation No. 82 of 2001 on

Water Quality Management and Water Pollution Control, class-I and class-II, for which the TSS Standard in the river water is determined to be 50 mg/L. Further the sediment charge load or mining waste water is allowed to be up to 200 mg/L. In other words, the mining waste water is allowed to enter the river with the TSS content of <200 mg/L. Therefore, the limiting factors of the scale of magnitude of impact are:

 Minimum limit is < 50 mg/L

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 Maximum limit is < 200 mg/L

The magnitude of impact of sediment charge load which enters the river is made in the scale of magnitude of impact, which is presented as follows:

Sediment Magnitude of charge Scale Value Impact (M) (mg/L)

After being < 50 1 Trivial

managed, the 50 - 200 2 Small sediment charge 200 - 350 3 Moderate enters the river 350 – 500 4 Large at a maximum of > 500 5 Extremely 78 mg/L, the Large magnitude of the

impact is

classified as

small, scale 2

Further when the sediment charge enters the river, it will further impact the physico, chemical and biological quality of the river. The most simple phenomenon is the dispersion of TSS in the river when the waste water coming out from the catch pond having the content of TSS > 50 mg/L is immediately mixed with river water and within a second the

PT Supreme Energy Muara Laboh 453 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW mixing process occurs throughout the cross-section of the river.

This event may occur in the steady state condition, meaning the flow rate as well as the concentration does no longer depend on the time. This phenomenon may occur in the downstream part of the river after the mixing zone with the final concentration of TSS in the river is Co. The mixing zone is a dispersion area of TSS impact which is estimated as far as 50 m from the outfall position. Based on the equation, the steady state condition is achieved at the content of TSS = 4,8 mg/L while the initial condition of

TSS in Liki river is 4 mg/L. The river is relatively shallow, so that the dispersion factor is quite large; thus the TSS dispersion area is estimated to be only about 200 m from the outlet position. However, due to the low TSS condition, it is necessary to conduct erosion management and sediment treatment in more strictly which will be discussed further in details in RKL.

Further, the determination on the significance of the impact shall refer to the laws and regulations and seven

(7) significant impact criteria. The significance of the impact is described in 5 scales of significant impact which refers to the TSS initial condition and the established class 1 and class 2 water quality criteria i.e. 50 mg/L.

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As the limiting factor it is established that :

- TSS condition = 4 mg/L as the minimum scale limit

- Standard = 50 mg/L as the maximum scale limit

Therefore the significance of the impact of the land opening on the physico-chemical quality of river water can be presented in the following scale of impact:

Scales of the significance of impact (I):

Significant impact The significance of No criteria impact (I)

(1) Total number of people None

affected

(2) Impact dispersion area Around 50 m of outfall

(3) Impact duration 4,8 mg/L during soil

works

(4) Impact intensity Low

(5) Number of environmental Physics-chemistry and

components biology

(6) Nature of cumulative of Non cumulative

impact

(7) Reversible or Reversible

Irreversible

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TSS content Value Significance of impact Scale (mg/L)

Dispersion of TSS in < 4 1 Not

the river in the significant

steady state is 4,8 4 - 50 2 Quite

mg/L, thus the impact signfiicant is classified as 50 - 95 3 Significant quite signficant, 95 - 140 4 More scale 2 significant

> 140 5 Extremely

significant

Without good management, the magnitude of the impact is quite significant and it could reach scale 2, but the significance of the impat remains in scale 2. The company already has a policy to manage the project in order that it does not create an impact (mitigated impact).

Further, the impact of the land opening activity on the river water quality is classified as ‘low’ (scale 2) and the significance of the impact is classified as ‘quite significant’ (scale 2). While the declinining river water quality as a result of production, injection well drilling, production well testing and well maintenance is classified

PT Supreme Energy Muara Laboh 456 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW as ‘small‘ (scale 2) and the significance of the impact is classified as ‘quite significant’ (scale 2).

3. Water run-off rate

Earthworks to open the site for the acitivies, in addition to create impact of erosion, it may also create impact of water run-off rate. The Wellpad area which is respectively having an area of +3 ha and PLTP area of +7,5 ha as well as access road section in the area of +3 ha are too small compared to the catchment area. However, no matter how small the water run-off is, it may carry sediment charge to the river which causes some concern that it may result in turbidity of the river water and sedimentation at the bottom of the river. The plan for the project site opening activity is predicted to possibly cause the impact of an increased water run-off which possibly could create a further impact of the declining river water quality. The magnitude of the impact could be calculated by comparing the water run-off (Q) before and after the land opening during earthworks.

The impact of earthworks during construction against water run-off rate is predicted to be as follows.

Some of the rain water which falls to the land surface will immediately enter the soil, which is called infiltration of water, and some will not enter the soil and therefore flow

PT Supreme Energy Muara Laboh 457 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW on the land surface to a lower place towards the river, lake and ocean, and is called water run-off flow (runoff). Some of the rain water that has entered the soil, in particular on the soil which is almost or has been saturated, will come out to the surface of the soil again, then flow to a lower place and it is called run-off water.

The rain which falls earlier will meet the need of water for evaporation, interception, infiltration and filling in the new basin, and the run-off water will occur when the rainfall has reached infiltratin rate into the soil. This event may occur if the rain water has achieved a peak flow.

Run-off coefficient (C) of each block of river catchment area shall depend on the slope class, type of soil and type of vegetation/cover.

Based on the rational equation, the prediction on the magnitude of water run-off rate that carries erosion sediment charge in the project site is presented in the following table:

Table 0-8 Surface Water Flow Rate

Open Impact on Flow Location Run Off Rate Area Rate

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(ha) Initial Open Condition (m3/detik) % (m3/detik) (m3/detik)

PLTP Area 7,5 0.1684 0.1725 0.0040 2.4

wellpad 4 0.1059 0.1187 0.0128 12.1 Area

Road 3 0.0882 0.0096 10.9 section

Based on the predicted impact of the project site land opening activity on water run-off, the magnitude and significance of the impact is presented in the following scale of impact:

Scale of the magnitude of the impact (M):

The magnitude of water run-off impact can be determined by comparing water run-off prior to and after earthworks, which is described in the percentage of impact from 0 -

100%. Further, the interval is used to prepare a scale on the magnitude of impact against water run-off, such as presented below:

Magnitude of % impact Scale Value Impact (M)

The magnitude < 20 1 Trivial

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of impact on 20 - 40 2 Small

the flow rate 40 - 60 3 Moderate of 2,4 - 12,1 % 60 - 80 4 Large so that the > 80 5 Extremely magnitude of large the impact is

trivial, scale

The magnitude of the impact is described in the increased water run-off rate which is ranging between 2,4 and 12,1% from the initial, physical condition. However, the flow rate is capable to carry sediment charge into the river, therefore the sediment charge needs to be controlled, either by controlling erosion or run off.

Further the determination on the significance of the impact shall refer to the laws and regulations and seven (7) significant impact criteria. The significance of impact is also described in 5 scales of significant impact which refers to the provisions of general mining that describes that water run-off which may also be called mining waste water, could carry sediment charge <200 mg/L. Meanwhile, according to the Government Regulation No. 82 of 2001 it has been established that the TSS Standard in the river is

50 mg/L. Therefore as a limiting factor, the sediment

PT Supreme Energy Muara Laboh 460 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW charge which may be carried by the water run-off is as follows :

- Minimum limit is < 50 mg/L

- Maximum limit is <200 mg/L

Based on the limit, the scale of significance of impact of land opening against water run-off can be presented in the following scale of impact :

Scale of significance of impact (I):

Significant impact The significance of No criteria impact (I)

(1) Total number of people None

affected

(2) Impacat dispersion area Within project boundary

(3) Impact duration During soil works

(4) Impact intensity Low

(5) Number of environmental Physico-chemical

components

(6) Impact cumulative Cumulative

impact

(7) Reversible or Reversible

irreversible

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Sediment

Significance of Impact charge Scale Value

(mg/L)

Without good < 50 1 Not

management, water run- significant

off is capable to 50 - 200 2 Quite

carry sediment charge significant maximum 198 - 388 200 - 350 3 Significant mg/L thus the impact 350 – 500 4 More is in scale = 4 significant

> 500 5 Extremely

significant

Therefore the land opening activity creates significant impact to the increased water run-off because the water run-off is capable to carry sediment charge> 200 mg/L.

Further the land opening activity against the increased water run-off may change the environmental condition to extremely good (scale 1) and the significance impact is classified more significant (scale 4).

4. Terrestrial Flora and Fauna

With the additional seven (7) new wellpads which are planned in the Geothermal Development Activities for PLTP

Muara Laboh in Solok Selatan District, it is predicted that

PT Supreme Energy Muara Laboh 462 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW it would impact the flora/vegetation in the project site.

The impact occurred in the flora is the loss of vegetation and the change of structure and composition and the declining diversity. The change of structure and composition of vegetation as a result of the plan and/or activitiy is predicted would happen at the construction stage which includes land clearing, land preparation, the existence of main buildings and its supporting facilities, roads, base camp construction.

With regard to the plan for this Geothermal Development

Activities, it is predicted that the structure and composition of the type of plants will change and even removed so as to degrade the good environmental quality

(scale 4) to moderate, and the level of the significance of the impact is classified as ‘significant’ (scale 3). The loss of flora or vegetation is as a result of land opening activity, which does not cover a too large area to build facilities and infrastructures. Besides, it also affects the life of the types of fauna existing in the activity locatin. In this case, the vegetation in forming a community may play a role as habitat, as provider of animal feed and place to take a break and place for protection from the attack of predator enemies.

The significance of impact of flora / vegetation is as follows :

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1. Total number of people affected (scale 3, significant).

Negative impact of flora / vegetation is predicted to be

directly felt by the communities in the vicinity due to

the loss of cultivated plants and paddy fields.

2. Impact Dispersion (scale 2, quite significant)

3. Impact duration (scale 3, significant)

4. Impact intensity (scale 2, quite significant)

5. Number of other environmental components affected

moderately (scale 3, significant)

6. The nature of cumulative impact (scale 3,signficant)

7. Reversibility or irreversibility of the impact

(reversible, scale 3, significant)

Based on the above description, the impact for the land preparation may change the environmental condition to

‘moderate’ (scale 3) and the significance of the impact is classified as ‘significant’ (scale 3). During this activity, there is no occurence of/it does not create other impacts or new impacts.

5. Aquatic Biota

The impact in the form of the abundance of plankton and bentos which basically is the consequential impact of degrading river water quality due to the increased sedimentation content (TSS) and turbidity of water as a

PT Supreme Energy Muara Laboh 464 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW result of erosion from land preparation activities in the form of opening and clearing of land which will be used as

PLTP location and also its supporting facilities. The higher the sediment charge (TSS) and water turbidity, the more it will disturb the aquatic biota photosynthesis activities (particularly Phytoplankton) which will finally cause the declining abundance of plankton and bentos.

The significance of the impact on flora/vegetation is as follows:

5. The total number of people affected. In respect of land

preparation activity against aquatic biota, there is no

direct impact to people. Therefore the impact is under

the category of insignificant negative impact.

6. Impact Dispersion. This activity is predicted to

utilize about 4 hectare land. Some lands no longer have

vegetation i.e. the existing wellpads. Therefore the

impact is under the category insignificant negative

impact.

7. Impact duration. The impact occurs during the

construction stage, therefore in terms of the impact

duration, it can be categorized as insignificant

negative impact.

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8. Impact intensity. Since the impact on the people and the

area is under the category insignificant, the intensity

is therefore concluded as insignificant negative impact.

9. The number of other enviromental components. The impact

occured does not have derivative impact because the

intensity is small and the duration is brief. It is

therefore categorized as insignificant negative impact.

10. Nature of cumulative impact. The impact does not

happen continuously therefore it is not of cumulative in

nature, and thus categorized as insignificant negative

impact.

11. Reversible or irreversible. The change occurring in

aquatic biota habitat will be reversible after the

completion of construction stage. Therefore, based on

the capability of impact to be reversible, it is

classified as insigniciant negative impact.

From the scale of signficance of environment it is categorized as less significant (scale 1). Therefore in terms of environment, the environmental condition will become poor (scale 2) and the significance of impact is classified as less significant (scale 1) as a result of this activity.

PT Supreme Energy Muara Laboh 466 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

5.1.3 Operation Stage

5.1.3.1 Labor recruitment

1. Work Opportunities

In the operation stage, the labor recruited by SEML must have competencies and/or certification according to its field, and the number of workers to be employed is around

200 to 240 persons from various fields of expertise. The labor recruitment activity will widen the employment opportunity in the study area, so that it will be able to improve the environmental quality to moderate (scale 3). In this stage the impact duration is long, accummulated and irreversible, the residents affected are significant, and the impact will disperse extensively, so that the level of significance of impact is under the category extremely significant (scale 5).

2. Business Opportunity

In the operation stage, the labor to be recruited is around

200 to 240 persons from various fields of expertise. They are recruited to be permanent worker and therefore will give impact to the increased quality of business opportunity from scale 1 to scale 2.

At this stage the people affected is significant, the impact will disperse and last very long, the other environmental components affected are high, accumulated and

PT Supreme Energy Muara Laboh 467 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW irreversible. therefore the level of significance of impact is under the category extremely significant (scale 5).

3. Community Income

The condition of the declining community income level due to the termination of employement of workers during construction stage is predicted to experience an increase again in the operation stage of Muaral Laboh PLTP development project. The source of increased community income is originating from the activity of labor recruitment to operate PLTP. As mentioned in the dissemination of activities in Hotel Ummi Kalsum Muara

Labuh, the operation workers of PLTP mostly will be recruited in the study area.

Thus, the labor recruitment in this operation stage will increase the community inocme from scale 2 (poor) to scale

3 (moderate).

In terms of significance of impact, the total number of people affected and the dispersion of impact dampak akan menyebar, the impact will last for a long time, i.e. during the operation stage. The other environmental components affected are high, for example the reduced pressure of residents’ economical activities against forest area, the increased social status of some of the residents etc. The impact will be accumulated through multiplier effects and

PT Supreme Energy Muara Laboh 468 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW irreversible. Therefore the level of significance of impact is under the category of extremely significant

(scale 5).

4. Social Values and Norms

The labor recruited during the construction stage of geothermal power plant is originated from an area outside

Solok Selatan and even outside West Sumatra Province. The workers recruited have special competencies and expertise and in general are originating from outside PLTP development area which bring different values and customs.

While the workers who do not have mining expertise are originating from local residents already know and understand the local social cultural condition. Labor recruitment from the communities outside geothermal development area certainly bring their own cultural values which could e understood by the communities because they are also from the eastern part, it would facilitate the adaptation process with its surroundings, since it can almost be said that the difference of cultural values and social norms universally is the same as they are also from

Indonesia. With respect to labor recruitment against the change of values and social norms of communities for environmental quality it could be categorized as moderate

PT Supreme Energy Muara Laboh 469 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

(scale 3) while the significance of impact is significant

(scale 3).

5. Perception of the Communities

Labor recruitment in the PLTP development operation stage in Nagari Alam Pauh Duo is predicted could create various perceptions and attitude of the communities. The perception and attitude of communities against labor recruitment for the geothermal exploitation development in Nagari Alam Pauh

Duo and Nagari Pauh Duo Nan Batigo which belongs to Pauh

Duo District.

This impact becomes significant because the perception and attitude of the communities against labor recruitment during the operation stage. During the activities, if there are things that they receive, understand, think of, feel and desire are not in accordance with what were perceived at the initial stage of PLTP development, the tendency is that there will be a change of perception to negative, which if not managed, will spread to various layers of society. In this kind of situation, the impact which is initially good may change to moderate (scale 3) to poor

(scale 2).

Based on the labor recruitment against the change of perception of the communities for environmental quality, it

PT Supreme Energy Muara Laboh 470 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW can be categorized as poor (scale 3) and the significance of impact is significant (scale 3)

PLTP Operation Activities

The geothermal fluid in Muara Laboh is classified as wet steam consisting of HP steam and LP steam, therefore what would be suitable in the PLTP operation activity plan is to use dual flash steam cycle technology. The PLTP operation activity is predicted to creat impact to the ambient air quality originating from H2S emission. The higher the NCG emission, the more extensive the dispersion of H2S gas, to include the areas around PLTP location. In addition to NCG emission, PLTP operational equipment also creates noise which rambatan bising cumulatively should be considered in the preparation of BED (basic engineering design). Duriing normal operation stage, the noise may only propagate several tens of meters from the source of noise, but during abnormal operation (turbine disturbance), the noise propagation may reach a radius of 1 km. Further, every year the Cooling tower needs to be cleaned up and the muds collected from Cooling tower pond is mixed with condensate water to be returned to the reservoir through injection wells. Based on the choice of PLTP operation technology, the impacts created by PLTP are as follows :

PT Supreme Energy Muara Laboh 471 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Table 0-9 Types of Impacts of PLTP Operations

No Source of Impacts The impacts created

1. Non Condensable Gas NCG separated in the Steam

(NCG) carried in HP Jet Ejector is released to

steam and LP steam the atmosphere through Fan

Cooling Tower and thus

creates H2S gas emission

2. Condensate water Returned to the earth

condensing at the through injection wells.

Condenser

3. Cooling Tower sludge Mixed with the condensate

with the content of and then returned to the

oxidized sulphur, in the earth through injection

amount of 1 - 2,5 m3 wells

per year

4. Noise from Steam Steam Turbine and

Turbine, Transformer, Transformer are placed in

Circulating Water Pump, the closed buildings to

Cooling Tower Fan isolate noise

5. High noise due to Reducing noise by

turbine disturbance so installing the noise

that the steam is reducing equipment called

released to the Rock Muffler

atmosphere through

PT Supreme Energy Muara Laboh 472 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

No Source of Impacts The impacts created

release valve.

The PLTP operation activity plan creates impacts to the physico-chemical environmental components, particularly to air quality and noise. Based on the characteristics of the

PLTP operation, the magnitude of impact created by the PLTP activity components may be predicted as follows : :

a) Prediction of emission and dispersion of H2S gas

Theoretically it is shown that the change of steam energy to turbine mechanical energy is taking place in the same entropy (proses isentropik). Turbine could only receive dry steam feed, and then the temperature and steam pressure reduced drastically after it is going out from the turbine, and 2-phase fluid is formed. The fluid going out from the turbine is two phase fluid which partly is in the form of steam fraction so that technically it will be difficult to return it to the earth. Therefore the 2 phase fluid first of all should be condensated in the Condenser to become saturated water so that it is easy to pump and flow it by gravity to the injection wells. Condenser is operating at vacuum pressure, because the change of specific volume of steam into water in no time has created a vacuum pressure in the Condenser. The next issue is that in the 2-phase

PT Supreme Energy Muara Laboh 473 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW fluid there is NCG (Non condensable gas) or gas that is not able to condense, especialy composed of H2S gas and CO2.

Therefore to release NCG from Condenser the NCG needs to be sucked using vacuuming equipment called Steam Ejector, then it is separated and released to the atmosphere through the

Cooling Tower stack. Surely the release of H2S gas emission and CO2 to the atmosphere may create environmental impact. Thus based on the description of principle of thermodynamics, the utilization of geothermal steam using Dual Flash Steam Cycle can be presented in the following simple flow diagram:

PT Supreme Energy Muara Laboh 474 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Figure 0-5 Diagram of Simplified PLTP Flow Process

The pressure on the wellhead is estimated to be 10 bara and

HP steam separation operation is taking place at the pressure of 9,1 bara and the reduced pressure of 1,3 until

HP steam up to PLTP is at the pressure of 8,7 bara. Further to prevent the formation of silica crust, the operational pressure of LP Separator should not exceed 4 bara.

Therefore LP steam up to PLTP is controlled at the pressure of 3,8 bara.

SEML has determined to build the PLTP with the capacity of

70 MW using Dual Flash Steam Cycle technology. HP steam from Wellpad ML-A is capable to produce 60 MW, then LP steam flash is added by the additional supply of LP steam from Wellpad ML-H may provide additional production of 10

MW, as such the total will become 70 MW. Thus HP steam and

LP steam enter the double flow turbine to move 2 2-poles generator at 3000 rpm (50 Hz).

b) Prediction of H2S gas emission from Cooling Tower

H2S gas which has been separated is released into the atmosphere through Cooling Tower stack so that H2S gas emission is released. The preparation of ANDAL is made after the project Feasibility Study is prepared, so that at present there are no detail design as yet from the Cooling

Tower which will be used by PLTP. Since gas emission is

PT Supreme Energy Muara Laboh 475 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW used as the basic calculation, then the rough calculation of measurement of Cooling Tower is required. As a reference for the calculation of Cooling Tower is by understanding the Cooling Tower scheme as follows:

 Cooling Tower is used to chill the Condenser water,

either latent heat steam load as well as condensed water

sensible heat.

 NCG that has been separated and originating from Steam

Ejector is released into the atmosphere through the

Cooling Tower stack so that H2S gas emission is released

from the Cooling Tower stack.

 NCG is released evenly to all Cooling Tower Fans/Stacks,

so that the amount of H2S gas emission depends on the

number of Cooling tower Fans/Stacks.

 The air flow is adjusted with the requirement of L/G

ratio in order to obtain H2S emission and make optimum

water. Make water Cooling Tower depends on the flow rate

of circulated cooling water.

The assumption will be the basis for the rough calculation of Cooling Tower which further will be the basis for the prediction of H2S gas emission. Based on the schematic description CO2 and H2S gas emission through the stack of the Cooling Tower is as follows:

PT Supreme Energy Muara Laboh 476 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

H 2S + COH 22 +S +H CO2O2 + + UdaraH2O + Air

Drift

Evaporation

NCG (H2SNCG + CO (H2S) dari+ CO Steam2) from ejectorSteam Ejector CerobongStack Air kondensatWarm condensatehangat water Kipas hisap

SemprotanWater Sprayersair

Aliran udaraAir flow TambahanAdditional air dan water bahan and kimia chemicals Air Waterpada suhu at ambient ambien temperature Air asinBrine Ke CondenserTo Condenser

Blow down Lumpur Mud Ke sumurTo reinjeksiinjection well Ke sumur Toreinjeksi injection well (Cleaning(Cleaning 1 tahun oncesekali a )year)

Figure 0-6 Simplified Process Flow Chart of PLTP

(Geothermal Power Plant)

Then dispersion of NCG will depend very much on the number of Cooling Tower fans, where in this project the number of

Cooling Tower fans is determined as 8 fans which will be technically determined further during BED (Basic

Engineering Design) at a later date. For example, the

Cooling Tower scheme with 4 fans is presented in the following picture.

PT Supreme Energy Muara Laboh 477 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

15 m

Figure 0-7 Schematic Drawing of Cooling Tower with 4 Fans

The height of Cooling Tower Stack is estimated to be 15 m as a reference for gas dispersion calculation. Further, to be able to calculate H2S or CO2 emission, the Cooling Tower design shall use an approach as described in the following table:

Table 0-10 Data of Cooling Tower for Calculation of H2S

Emissions

Parameter Unit HP Steam LP Steam Condenser

Pressure bara 8,7 3,8 0,1

Temperature oF 573,7 477,26 211,34

Steam enthalpy Btu/lb 1180,96 1204,46 1150,12

Water enthalphy Btu/lb 580,2 461,14 179,513

Steam entropy Btu/lboF 1,3606 1,4547 1,7577

Water entropy Btu/lboF 0,779228 0,66129 0,311165 inflow Steam kg/s 120 24,5 144,5

PT Supreme Energy Muara Laboh 478 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Parameter Unit HP Steam LP Steam Condenser

Condensate % 72,6 79,1

Condensate flow kg/s 87,1 19,4 rate

Steam outflow kg/s 32,9 5,1

∆H Steam kJ/h 121.419.661 18.918.781

∆H Air kJ/h 12.644.538

Condenser Load kJ/h 152.982.980

Circulated cooling water flow rate depends on the L/G ratio, which later determines the amount of Cooling tower make-up water. The L/G ratio is determined by the enthalpy of the air and circulated cooling water temperature which can be described in the following equation:

h- 2 h1 Water and air ratio L/G = ------Cp (T - T ) 1 2

The amount of L/G will determine the air flow rate into the Cooling Tower, so that it would also affect the amount of H2S gas emission. Based on the data of the Cooling

Tower and L/G, the amount of H2S gas emission from the stack of the Cooling Tower can be estimated as follows:

PT Supreme Energy Muara Laboh 479 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

L/G ratio Unit 1,6

Circulated cooling t/h 8.345

water

Steam flow rate kg/s 144,5

NCG % 0,6

NCG flow kg/s 0,867

H2S mg/kg 118

H2S flow mg/s 102,306

Total air flow Nm3/h 2.950

3 H2S gas emission mg/Nm 34,7

Correlation between Cooling Tower water make-up and H2S gas emission is presented in the following figure:

PT Supreme Energy Muara Laboh 480 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

2 BML 35 mg/Nm3 S gas emission, mg/Nm emission, S gas 2 H

Figure 0-8 Correlation between Water Make-up and H2S Gas

Emission

Thus the minimum make-up water is 110 m3/hour in order to have gas emission which does not exceed its Standard. This flow rate of make up water will affect the flow rate of the circulated cooling water and L/G ratio. According to

Regulation of Minister for Environmental Affairs (Permen

LH) No. 21 of 2008, Appendix V – Immovable Source Standard for PLTP is 35 mg/Nm3. Thus in order to meet the Standard for the H2S gas emission, the minimum make-up water 100 t/h. The Cooling tower operation is estimated as follows:

PT Supreme Energy Muara Laboh 481 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

3 H2S gas emission mg/Nm 34,7

L/G ratio – 1,6

Circulated cooling m3/h 8.345

water

Make-up water m3/h 101

3 H 2S gas emission of 34,7 mg/Nm is considered to be safe for the environment, though make-up water may reach 101 t/h. Thus the total project water requirement is estimated to be 130 m3/hour.

c) Predictiom of gas H2S gas dispersion in the atmosphere

H2S and CO2 gas which has been separated from the steam is released from the Steam Ejector into the atmosphere through the respective Cooling Tower stack. The Cooling Tower consists of 8 fans and H2S gas emission is distributed to all fans of the Cooling Tower. Further, the H2S gas emission coming out of the Cooling Tower stack will be dispersed in the atmosphere depending on the direction and speed of the wind at that time. The pattern of gas and particle dispersion in the atmosphere can be determined based on a mathematical algorithm, among others by using the options of Box Model, Gaussian Model, Eulerian Model and Lagrangian Model. Here, the dispersion pattern of Stack

PT Supreme Energy Muara Laboh 482 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW particles and emission is using Gauss formula. Based on the Gauss formula, gas and particle concentration at the ground level can be estimated by using the following mathematical model:

Where

C = concentration of pollutant at ground level, g/m3

Q = pollutant emission, g/s

U = average wind speed, m/s

σy = deviation standard in plume horizontal, m

σz = deviation standard in plume vertical, m H = effective stack height, m x = Distance of dispersion from Stack in the direction of x axis, m y = Distance of dispersion perpendicular to centerline, m e = natural number = 2,71828

The design height and Stack diameter will be determined by a mechanical draft IDF and the desired limit of the gas dispesion area. Therefore, to calculate maximum gas

PT Supreme Energy Muara Laboh 483 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW dispersion, the stack height is the physical stack height plus stack imaginer height

Hstack = Hfisik + ∆H

Physical stack height (Hfisik) is the height of the stack measured physically, while the height of, imaginary stack

(∆H) is the additional height of plume as determined by plume rise velocity. The height of this imaginary stack may be determined by the following Davidson & Bryant equation:

Vs 1.4 ∆Ts ∆H = ( ) ( 1 + ) T u

Thus the imaginary stack height is affected by the plume rise velocity from the stack (vs), wind speed (u), temperature of gas coming out of the stack (Ts) and ambient air temperature (T). With the stack height of 15 m and stack diameter of 8 m, the average wind speed at the project location is 2,1 m/second and the wind direction dominant to the North-West direction, thus the H 2S gas dispersion in ambient air can be estimated.

Gas dispersion in ambient air is of cumulative in nature, both dispersion originating from one Coolinng Tower and the others. With the impact of gas and particle dispersion, the

PT Supreme Energy Muara Laboh 484 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW ambient air quality (KUA) will experience the following change:

Ambient air quality = Baseline Condition + Gas dispersion impact

The change of ambient air quality will also change the environmental carrying capacity. The change of the environmental carrying capacity is the difference between the Environmental Standard and the estimated environmental quality; therefore, the impact on the reative environmental carrying capacity (DLR) in percentage (%) can be described by the following equation:

D ─ D DLR = T R x 100% D R Where:

DT = environmental carrying capacity after project = ambient

air quality – standard

DR = initial environmental carrying capacity = baseline

ambient air qualtiy – Standard

Then the absolute environmental carrying capacity (DLA) in percentage (%) can be described with the following formulation: K UA 1 Standard

PT Supreme Energy Muara Laboh 485 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

DLA = x 100%

The absolute environmental carrying capacity may be used by the Regional Government as a reference in spatial design in relation to the designated purpose of the land for each type of activity which potentially creates impact on the air quality. The gas dispersion pattern in ambient air originating from Cooling tower stack emission is estimated as follows:

3 50 3

H 2S Odor Level g/Nm BMLH bau 2S μ Standard 40 S Content,S µg/Nm 2 S ambien, ambien, S 2 30 Ambient H Kadar H Kadar

Max 10 Min

0 0 AreaArea of 100 200 300 400 500 DampakImpact

DistanceJarak dispersi of H S Dispersion H2S dari Cooling from Cooling Tower, Tower, m m 2

Figure 0-9 Dispersion Pattern of H2S Gas from Cooling

Tower

The detailed Cooling Tower design will be determined during the BED (Basic Engineering Design) stage. The H2S gas

PT Supreme Energy Muara Laboh 486 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW dispersion in ambient air is less than 100 m from Cooling tower stack or is still in the factory buffer zone area.

Therefore the odor of H2S gas does not spread to the nearest residential area located within the radius of 1000 m from the PLTP area. The characteristics of H2S gas exposure in ambient air is as follows:

Table 0-11 Characteristics of H2S Gas [and its impacts] on

Human Health ’s

H2S gas Unit Impact to Health content

15.000 µg/Nm3 Iritation in the eyes and

throat

70.000 µg/Nm3 Smart eyes up to blurred

vision

225.000 µg/Nm3 Collapse and unconscious

400.000 µg/Nm3 Breathless or difficulty in

breathing

800.000 µg/Nm3 Die within 30 minutes

1.400.000 µg/Nm3 Die instantly

At the content of over 225,000 µg/Nm 3 the smell of

H2S gas canno longer be detected by the smell, however it may have a fatal impact. The maximum

PT Supreme Energy Muara Laboh 487 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW content of H 2S gas from the PLTP in ambient air shall be 43 µg/Nm 3 which only causes repugnant smell like rotten eggs within a radius of less than 100 m, hence it will only cause inconvenience to the work environment of the employee, but it will not affect the health of the people. The position of the Cooling Tower in the plant layout of PLTP is presented in the following figures:

Cooling Tower

Figure V-10 Position of Cooling Tower and Plant

Layout of PLTP

Pursuant to Regulation of the Minister of

Environment No. 21 of 2008, the quality standard of

3 H2S emissions is 35 mg/Nm , hence the scale of the impact of the current well production testing activities on air quality may be presented in the scale of impact as follow:

PT Supreme Energy Muara Laboh 488 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Scale of Impact (M):

H 2S gas Scale of Impact (M) Scale Score Emission

3 Emission of H 2 S gas > 35 mg/Nm 1 Very Bad

during production 25 – 35 2 Bad test is 9.5 mg/Nm 3, mg/Nm3

hence the scale 15 – 25 3 Medium impact shall be mg/Nm3

equal to scale 4 5 – 15 4 Good mg/Nm3

< 5 mg/Nm 3 5 Very

Good

Further, the determination of the significance of the impact shall refer to the legislation and 7

(seven) criteria of significant impacts. The residential area is located far away from the location of the wellpad, hence it facilitates the performance of the production test, without disturbing the comfort of the people. The laws and regulations used as the limiting factor is Decision of the Minister of Environment No. 50 of 1996 on

Odor Standard in which the quality standards of H 2 S odor is set at 28 mg/Nm 3 as the maximum limit. The minimum threshold is set as the minimum limit, that

PT Supreme Energy Muara Laboh 489 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW is 0.0005 ppm or 1 mg/Nm 3 . Further, based on these limits, the significance of the impact is also expressed in 5 scales of significant impacts, the result is as described below:

Magnitude of significance of impact (I):

Significant Impact Signficance of Impacts No Criteria (I)

(1) Number of people Drilling Operator

affected

(2) Area of impact Well Pad Area

distribution

(3) Duration of impact Baseline, for 10 days

(4) Impact intensity Low

(5) Number of environmental None

components

(6) Impact cumulative No impact

nature

(7) Reversibility or No impact

irreversibility

Significance of Ambient Scale Score Impact

3 H 2S gas < 1 µg/Nm 1 Insignificant

dispersion in 1– 10 2 Quite

PT Supreme Energy Muara Laboh 490 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Significance of Ambient Scale Score Impact

the ambient air µg/Nm3 Significant

is normally <4 10– 19 3 Significant g/Nm 3 and at µg/Nm3

maximum < 8 19– 28 4 More 3 g/Nm 3 well below µg/Nm significant

3 the Quality > 28 µg/Nm 5 Very

Standard of 28 significant

g / Nm3 . The gas

is dispersed in

the work

environment

only, so that

the impact is

equivalent to

scale 2

In the planned well production test activities, the impact of H 2 S gas is only dispersed within the project boundary namely in the wellpad area and does not extend to people’s settlements. Hence distribution of the impact of H 2S gas is within the work environment which renders the applicable NAB

(Threshold Value) of the work environment. Thus the

PT Supreme Energy Muara Laboh 491 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW planned well production test has no significant impact on the quality of ambient air in the wellpad and the surrounding areas. Thus, this activity may change the environmental quality to become good

(scale 4) and the significance of impact is categorized as quite significant (scale 2).

d) Estimated emission load of CO 2 gas

NCG has CO 2 and H2S contents, so that in addition to causing H 2S emissions, it also causes CO2 emissions.

CO2 gas does not have a direct impact on the environment, but it has impact on the global climate. In other words, CO 2 emissions is not a significant environmental parameter, hence this

ANDAL (Environmental Impact Analysis) shall only consider the CO 2 emissions load and its contribution in the national level. However, due to the concerns of the world on global warming issues as the result of the high greenhouse gas emissions (CO 2 , CH4 , N2 O and HFC) from developed countries, all countries are required to reduce the the CO 2 emission load.

Based on estimates from various national and international sources, CO 2 emissions in Indonesia range between 400 and 500 million tonnes per year.

Many agencies have conducted studies to estimate

PT Supreme Energy Muara Laboh 492 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the CO2 emissions in Indonesia, but the most realistic one is the result of a study by the New

Straits Times (1995), which is shown in the following table.

Tabel V-122 Projected CO 2 Emission in Indonesia

CO 2 Emission in

Year million

tons/year

1988 111

1995 172

2000 220

2005 301

2010 382

2015 533

2020 684

During the production test, the NCG released into the atmosphere is 2% of the total wet steam flow rate and 90% of which is in the form of CO 2 gas.

With wet steam flow rate of 34 kg/s and duration well production test is 10 days, the CO 2 emissions load released into the atmosphere is equal to the following:

Wet steam flow rate 34 kg/second

PT Supreme Energy Muara Laboh 493 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

NCG Content 2%

CO2 Content in NCG 90%

Duration of production test 10 days

Number of production well 27 wells

CO2 emission equivalent 14,3 tonnes/year

National contribution 0 % (trace)

Thus the CO 2 emissions during the production test of the 27 production wells contribute to national CO 2 emission load of 0% (trace) due to the small load of CO2 emissions. The result of the study of primary tropical rain forests shows that primary forests can absorb CO 2 of 18.35 tonnes/ha/year. Thus the CO 2 emissions of 14.3 tonnes/year can be absorbed by primary forest in the area of 25.8 hectares.

Moreover, the protected forest area in South Solok is approximately 84,079 hectares, which is more than enough to absorb the emissions and the CO 2 gas dispersion.

e) Estimated Noise during PLTP Operation

Literally noise can be interpreted as an auditory sensation that can be sensed by the human ear, while physically sound is a pressure gradient emitted by the source of the sound. The sound

PT Supreme Energy Muara Laboh 494 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW propagates through a medium in which the particles in the air vibrate and cause changes in air pressure, and therefore the intensity is expressed as sound pressure. A-weighted sound pressure level that is equivalent and continuous (L eq) is used to measure the noise level which constitutes measurement of sound energy and is expressed in of decibels (dB). The noise level is a measure of sound energy that is equivalent and continuous (L eq) and which is expressed in units of dB (A).

Frequency of sound that can be heard by human ear is limited, which ranges between 20 Hertz and

20,000 Hertz. This frequency region is called audiosonic. The human ear is most sensitive at a frequency of about 3,000 Hertz, which means that at this frequency, the sound pressure is very weak though it can still be heard by the human ear. The limit of the intensity of the sound at a frequency of 1000 Hertz is 10 - 16 Watt/cm 2 and the highest sound intensity limit before causing pain to the ear is

1014 times the limit of the weakest intensity of 10 - 2

Watt/cm 2. Thus the noise measurements can be used as a tool to determine the impact of noise on humans.

Noise monitoring is done by measuring the noise

PT Supreme Energy Muara Laboh 495 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW level dB (A) which is aimed to determine the impact of noise on human health and environmental comfort.

The relationship between the noise level and the distance from the simple sound source can be basic formula to predict the propagation of noise from a source of noise to the environment. Propagation of noise from PLTP’s equipment can be expressed by the formula:

Lr = Lo – 20 Log r - 8 Half open field

Where:

Lr = Level of noise at the distance of r meter

from the sound’s source, dB(A)

Lo = Level of noise at the source of noise, dB(A) r = distance from source of noise, meter

PLTP (geothermal power plant) equipment having the potential to cause noise among others, are as listed in the following table:

Tabel V-13 Propagation of Noise from Equipment of

Geothermal Power Plant (PLTP)

Level of Equipment Source of Noise Noise Location

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dB(A) Indoor Outdoor

Steam turbine - 105 √ Generator

Condenser unit 102 √

Generator step up 101 √ transformer

Cooling tower fan 114 √

Circulating water 82 √ pump

The steam turbine and generator are located in the building so it can minimize the noise outside the building. While Transformer and Cooling towers are located outside the building so the noise are directly exposed to the environment. Therefore, the noise heard from the PLTP are the noises from the

Generator step-up transformers and cooling tower fans, which means that the rotation of the many fans causes the noise. While the rotation of steam turbine-generator generates lower noise since it is muffled in the building. Thus, equipment of PLPT having potential to be sources of noise is the steam turbine and Cooling tower. Noise propagation from each of the primary equipment may be presented in the following figure:

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120 BML 110 55 dB(A)

100 Turbine 90

80 Bising peralatan PLTP, dB(A) PLTP, peralatan Bising 70 Cooling tower

40 1 20 40 60 80 100 120 140 160 180 200

DistranceJarak rambatan of Noise Propagation bising dari PLTP, from PmLTP, m Figure V-11 Pattern of Propagation of Noise from

PLTP Equipment

PLTP noise can be heard from a distance of 500 meters from the location of PLTP, which has less significant impact on residential areas which is located 1000 meters from the location of PLTP.

Emergency situation takes place when turbine interruption occurs, causing sudden and automatic excess pressure throughout the vapor released into the atmosphere through the release valve. Expansion of the steam pressure on the release valve generates very noisy squeak which may be heard at a distance of 1 km. Therefore, when there is a sudden pressure due to turbine interruption, the steam escaping from the relief valve flows into the Rock

Muffler in order to reduce noise. Installation of

PT Supreme Energy Muara Laboh 498 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the Rock Muffler can reduce noise so that it can only be heard in a radius of less than 300 m from the noise source.

Scale of Magnitude of the Impact (M):

The magnitude of impact refers to the limit of noise that is considered safe for the health and comfort of the environment, in accordance with

Circular of the Minister of Manpower No.SE.01

SE/MEN/1978, Regulation of the Minister of Health

No. 718 of 1987 and Decision of the Minister of

Environment No. 48 of 1996. Based on these provisions, the tolerable noise level is 55-85 dB

(A), and based on the foregoing, scale of magnitude of impact can be made as follows:

Magnitude of Impact Interval Scale Score (M)

During the drilling, < 55 dB(A) 1 Very noise at the little distance of 10 m 55 – 70 2 Little from the source of dB(A) noise = 74 dB (A), 70 – 85 dB(A 3 Medium whereas during 85 – 100 4 High production test, dB(A noise can reach 98 > 100 dB(A) 5 Very High

PT Supreme Energy Muara Laboh 499 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Magnitude of Impact Interval Scale Score (M) dB (A). So the scale of magnitude of impact on the production test is

Furthermore, the determination of the significance of impact refers to legislation and the 7 (seven) criteria of significant impacts. The nature of the importance of the impact is also expressed in 5 scales of significant impacts which refer to the provisions of ISO (International Standardization

Organization) and Decision of the Minister of

Environment No. 48, 1996. Pursuant to the ISO, the normal hearing threshold is <25 dB (A), while according to Decision of the Minister of

Environment No. 48 1996 the comfort of settlement will not be disturbed if the noise level is <55 dB

(A). Based on these limits, the intervals between the noise level is 25 dB (A) to the worst limit of

60 dB (A) which is determined as significant impact. Scale of the properties of significance of impact of loud noise can be described as follows:

PT Supreme Energy Muara Laboh 500 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Scale of Significane of Impact (I):

Criteria of Properties of Impact No Significant Impact Significance (I)

(1) Number of people Drilling Operator

affected

(2) Area of impact Work environment of

distribution 250 m

(3) Duration of impact Noise baseline, 3

months

(4) Impact intensity Low

(5) Number of None

environmental

components

(6) Cumulation of impact None

(7) Reversibility or None

irreversibility

Significane of Interval Scale Score Impact

Noise only affect < 25 1 Not

the drilling dB(A) Significant

operator, and no 25 – 40 2 Quite people are dB(A) Significant

affected by such 40 – 55 3 Significant

PT Supreme Energy Muara Laboh 501 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Significane of Interval Scale Score Impact

noise, thus the dB(A

scale of impact 55 – 70 4 More is = 2 dB(A significant

> 70 5 Very

dB(A) significant

Without Rock Muffler noise propagation during production test can reach ± 1000 m, but with Rock

Muffler propagation of noise only reaches ± 250 m radius. At a radius of 250 m there is no settlement, while the nearest settlement to the wells at Wellpad C is Kampung Baru which is located approximately ± 500 m from the Wellpad. Thus, the radius of ± 250 m only covers the work environment and not the settlement, so the noise at the settlement is equivalent to the baseline of the noise. Therefore, the planned drilling and production test is expected to cause a quite significant impact on the comfort and health of people living in Kampung Baru at a radius of ±

1,000 m from the location of Wellpad C.

The impact of drilling and production test in changing the noise level becomes higher (scale 4)

PT Supreme Energy Muara Laboh 502 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW and the impact is categorized as ‘quite significant’ (scale 2).

f) Quality of Surface Water

Hot water and brine injection activity has the potential to increase the pH value of the surface water in the vicinity of the drilling, which means the water becomes more alkaline (pH> 7). Results of a laboratory analysis showed that the current value of the pH of river water still meets class II water quality standards (Government Regulation No. 82 of

2001) which ranges from 6.05 to 8.2.

With the runoff and infiltration of hot water and brine, then the pH value of river water is expected to be higher. This increase is due to the addition of new more alkaline materials which are originating from the runoff and infiltration.

However, the increase in the pH value is not expected to exceed the threshold of water quality standards, namely 9.

Determination of significant impact based on the significant impact criteria is described as follows:

12. The number of people affected. The impact of

operations of the PLTP on the pH value does not

PT Supreme Energy Muara Laboh 503 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

directly affect humans. Therefore, the impact

is categorized as insignificant negative

impact.

13. Area of impact distribution. Hot water and

brine injection will be done in production and

injection wells so that the affected area is

very small. Therefore, the impact is

categorized as insignificant negative impact.

14. The duration of the impact. The impact does not

occur continuously but rather accidentally

namely if there is a leak in the settling pond

at the injection activity. Therefore, the

impact is categorized as an insignificant

negative impacts.

15. The intensity of the impact. An increase in the

pH value of the water of the river at the site

of injection wells is not expected to be high

so that it can be categorized as insignificant

negative impact.

16. The number of affected environmental

components. An increase in the pH value will

not cause derivative impact due to its low

intensity, so that it can be categorized as a

insignificant negative impact.

17. The cumulative nature of the impact. The impact

PT Supreme Energy Muara Laboh 504 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

does not occur continuously, hence it is not

cumulative. Therefore, the impact may be

categorized as an insignificant negative

impact.

18. Reversibility or irreversibility of the impact.

An increase in the pH value in water bodies

will recover naturally so that it can be

categorized as an insignificant negative

impact.

Based on the above description, it can be noted that the quality of the environment is on a scale 3

(moderate) to poor (scale 4), with the impact categorized from ‘quite significant’ (scale 3) to

‘significant’ (scale 4).

g) Aquatic Biota

Drilling activities will cause derivatives impact such as decrease in water quality to increase the sediment content (TSS) and turbidity of the water, it will disrupt the photosynthetic activity of aquatic biota (especially phytoplankton) that will ultimately lead to decreased abundance of plankton and benthos. It is predicted to decrease the environmental quality from scale 3 (medium) to 2

(poor).

PT Supreme Energy Muara Laboh 505 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Determination of significant impact based on criteria of significant impact is described as follows:

19. The number of people affected. The impact of

land clearing activities on aquatic biota will

not have an immediate impact on humans.

Therefore, the impact is categorized as non-

significant negative impact.

20. Area of impact distribution. Some plots of land

which will be used for well sites no longer

have any vegetation namely existing wellpads.

Therefore, the impact is categorized as

insignificant negative impact.

21. The duration of impact. The impact will last

during the construction stage, therefore, in

terms of duration of the impact, it can be

categorized as insignificant negative impact.

22. The intensity of the impact. Since the people

and area affected is not considered as

significant, the intensity will be concluded as

be insignificant negative impact.

23. The number of other environmental components

affected. The impact that occurs does not have

derivative impact due to its low intensity and

short duration. Hence it may be categorized as

PT Supreme Energy Muara Laboh 506 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

insignificant negative impact.

24. The cumulative nature of the impact. The impact

does not occur on continuously, hence it not

cumulative, and it may be categorized as

insignificant negative impact.

25. Reversibility or irreversibility of the impact.

Changes in aquatic habitat will be restored

after the construction stage ends. Therefore,

based on the reversibility of the impact, the

negative impact is categorized as non

significant.

Based on the scale of significance, the environment is categorized as (scale 1) less significant. Based on the above descriptions, the quality of the environment will be changed to poor (scale 2) and the significance of impact is categorized as less significant (scale 1).

h) Community Perception

The impact of changes in the public perception is a derivative effect of the noise level at the time of production well testing activities at this operation stage. In the situations, the impact which was originally good turn into medium (scale

3) to poor (scale 2).

PT Supreme Energy Muara Laboh 507 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Determination of significant impact based on criteria of significant impact is described as follows

26. Number of people affected. The impact of

drilling and production test has potential to

cause direct impact to people. Therefore, the

impact is categorized as significant negative

impact.

27. Area of impact distribution. This activity is

expected to affect only the area around the

activity location. Therefore, the impact is

categorized as insignificant negative impact.

28. The duration of the impact. This activity lasts

for less than one month, therefore, in terms of

its duration, the impact can be categorized as

insignificant negative impact.

29. Intensity of the impact. Since the people and

the area affected is considered as

insignificant impact, the intensity is

concluded as a non significant negative impact.

30. Number of other environmental components

affected. The impact that occurs does not have

derivative impact due to its low intensity and

short duration. It may be categorized as an

insignificant negative impact.

PT Supreme Energy Muara Laboh 508 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

31. Cumulative nature of the impact. The impact

does not occur continuously so it is not

cumulative, it is categorized as an

insignificant negative impact.

32. Reversibility or irreversibility of the impact.

Changes in aquatic habitat will be restored

after the construction stage ends. Therefore,

based on the reversibility of the impact, the

negative impact is categorized as

insignificant.

Based on the impact of recruitment of labor to the change in community perception for the quality of the environment, the impact can be categorized as poor (scale 3) with insignificant impact (scale 1).

i) Public Health

During the operation stage there will likely be drilling of new wells and construction of new wellpads. It is intended as an anticipation to the decline in the quality of the existing production wells and injection wells. There will certainly be an increase in the concentration of CO 2 and H2S in the air and wastewater. A geothermal power plant is an environmentally friendly power plant, since the waste was generated from the generation process

PT Supreme Energy Muara Laboh 509 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW which is only in the form of warm water (+/- 500C) and the steam as well as small amount of CO 2 and

H2S. Since waste water from wells mostly flows directly back into the ground to maintain the supply of fluid that has been used, the potential contamination of the environment by waste generation has a very small effect on the environment. Waste water from the drilling which is contained in the mud pond and water pond will also be injected back into the bowels of the earth through injection wells when it is not used for drilling. Gray water as domestic liquid waste will be treated in the waste water treatment system in order to meet quality standards, while the the domestic liquid waste in the form of black water will be discharged into septic tanks. However, interviews with the people in the area adjacent to the project site especially people of Jorong

Taratak Tinggi, show that the people was once bothered by the smell of sulphur around their residences, in which the smell becomes even stronger during the rain. The smell of sulphur is predicted to generate an impact during well testing and the production wells maintenance activities.

Hence, it may be predicted that environmental

PT Supreme Energy Muara Laboh 510 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW impact of activities in the operation stage has the environmental quality scale of ‘poor’ (scale 2).

The lowering health status of the people is the impact derived from the activities/projects and it is of negative nature. This impact comes from the production and injection well drilling, and production well testing and maintenance of production wells in the post-construction stage

(operational). Due to the lowering health status of the people, it is estimated that the number of people affected is relatively large hence the impact is significant, the distribution of impact covers quite a wide area which causes the intensity of the impact to become significant and the impact will have long duration (significant).

Environmental components affected are not limited to public health, instead it will affect other environmental components. The nature of the impac t is not cumulative and reversible (insignificant).

The impact is irreversible, so that the impact is insignificant and the degree of the significance is categorized as more significant (scale 4)

PT Supreme Energy Muara Laboh 511 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

5.1.3.3 Commisisioning

Commissioning which is done first to turbine operation will result in higher noise levels. This activity will include test equipment operation, functional test, protection and interlock tests, and so on. All competent authorities will be involved during the test.

Scale of magnitude of the impact (M):

The magnitude of impact refers to limit of noise that is considered safe for the health and comfort of the environment, in accordance with Circular of the Minister of Manpower No.SE.01 SE / MEN / 1978,

Regulation of the Minister of Health No. 718 of

1987 and Decision of the Minister of Environment

No. 48 of 1996. Based on these provisions, the amount of tolerable noise level is 55-85 dB (A), and based on the foregoing, the scale of magnitude of impact can be made as follows:

Magnitude of Impact Interval Scale Score (M)

At the distance of < 55 dB(A) 1 Very

10 m from the little

PT Supreme Energy Muara Laboh 512 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Magnitude of Impact Interval Scale Score (M) sources of noise, 55 – 70 2 Little the level of noise dB(A) of PLTP equipment 70 – 85 dB(A 3 Medium ranges between 80-91 85 – 100 4 High dB (A), hence the dB(A scale of magnitude > 100 dB(A) 5 Very High is categorized as high or equal to 4.

Furthermore, the determination of the significance of the impact refers to the legislation and the 7

(seven) criteria of significant impacts. The nature of the significance of the impact is also expressed in 5 scale of significant impacts which refer to the provisions of ISO (International

Standardization Organization) and Decision of the

Minister of the Environment No. 48 of 1996.

Pursuant to the ISO, the normal hearing threshold is <25 dB (A), while according to Decision of the

Minister of Environment No. 48 1996 the comfort of settlement will not be disturbed if the noise level is <55 dB (A). Based on these limits, the intervals between the noise level is 25 dB (A) to the worst

PT Supreme Energy Muara Laboh 513 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW limit of 60 dB (A) which is determined as significant impact. Scale of the properties of significance of the impact of noise can be described as follows:

Scale of Significance of Impact (I):

Criteria of Properties of Impact No Significant Impact Significance (I)

(1) Number of people PLTP Operators

affected

(2) Area of impact 500 -1,000 m From PLTP

distribution

(3) Duration of impact Noise baseline, during

the lifetime of the

project

(4) Impact intensity Low

(5) Number of None

environmental

components

(6) Cumulation of impact None

(7) Reversibility or None

irreversibility

Significance of Interval Scale Score Impact

PT Supreme Energy Muara Laboh 514 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Significance of Interval Scale Score Impact

During normal < 25 1 Not

operation, noise dB(A) Significant

can be heard from 25 – 40 2 Quite 500 m away, and dB(A) Significant

the closest 40 – 55 3 Significant residential area dB(A

is more than 1 km 55 – 70 4 More away, thus the dB(A significant

scale of impact > 70 5 Very

is = 2 dB(A) significant

Thus, Geothermal Power Plant (PLTP) operation does not create noise to nearby residential areas and only affect the PLTP operators. Therefore the planned operation of PLTP are not expected to crate a significant impact on the comfort and health of people living around the location of PLTP. Since this activity may change the noise level to quite high (scale 4), the the impact is considered as

‘quite significant’ (scale 2).

5.1.3.4 Operation of Turbine and Condensor a) Noise

PT Supreme Energy Muara Laboh 515 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Literally, noise can be interpreted as an auditory sensation that can be sensed by the human ear, while physically sound is a pressure gradient emitted by the source of the sound. The sound propagates through a medium in which the particles in the air vibrate and cause changes in air pressure, and therefore the intensity is expressed as sound pressure. A-weighted sound pressure level that is equivalent and continuous (L eq) is used to measure the noise level and constitutes measurement of sound energy and is expressed in a scale of decibels (dB). The noise level is a measure of sound energy that is equivalent and continuous (L eq) and which is expressed in dB (A).

Frequency of sound that can be heard by human ear is limited, it ranges between 20 Hertz to 20,000

Hertz. This frequency region is called audiosonic.

The human ear is most sensitive at a frequency of about 3,000 Hertz, which means that at this frequency, the sound pressure is very weak though can still be heard by the human ear. The limit of the intensity of the sound at a frequency of 1000

Hertz is 10 -16 Watt/cm 2 and the highest sound intensity limit before causing pain to the ear is

1014 times the limit of the weakest intensity of 10 - 2

PT Supreme Energy Muara Laboh 516 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Watt/cm2. Thus the noise measurements can be used as a tool to determine the impact of noise on humans. Noise monitoring is done by measuring the noise level dB (A) which is aimed to determine the impact of noise on human health and environmental comfort.

In addition to NCG emissions, operation of PLTP equipment may also cause noise in which its cumulation should be considered in the preparation of BED (basic engineering design) of PLTP equipment. The relationship between the noise level and the distance from a simple sound source may serve as basic formula to predict the propagation of noise from the source of noise to the environment. Many PLTP equipment are sources of noise, but among the PLPT equipment, the equipment which has the highest potential to cause noise impacts are shown in the following table:

Tabel V-14 Propagation of Noise of PLTP Equipment

Level of Equipment

Source of Noise Noise Location

dB(A) Indoor Outdoor

Steam turbine - 105 √ Generator

PT Supreme Energy Muara Laboh 517 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Level of Equipment

Source of Noise Noise Location

dB(A) Indoor Outdoor

Condenser Unit 102 √

Cooling Tower Fan 114 √

Circulating Water 82 √ Pump

The steam turbine and generator are located in the building so it can reduce noise outside the building. While the Transformer and Cooling Tower are located outside the building so the noise are directly exposed to the environment. Therefore, the noise heard from the PLTP are noises from the

Generator step-up transformers and Cooling Tower

Fans, it means that the rotation of the many fan causes the noise. Meanwhile, the rotation of the

Steam Turbine-Generator generates lower noise since it is muffled in the building. Thus, equipment of

PLPT having potential to be sources of noise is steam turbine, Circulating Water Pump and Cooling

Tower. Noise propagation from each of the primary equipment may be presented in the following figure:

PLTP noise can be heard from a distance of 500 m from its location, so in terms of the noise, the

PT Supreme Energy Muara Laboh 518 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW nearest distance of residential area to the location PLTP is 500 m. In other words, the radius of 500 m serves as buffer zone for the noise of geothermal power plant (PLTP). Based on the predicted impacts of PLTP operations in terms of noise, the magnitude and the significance of impacts may be presented in the scale of impacts as follows:

Scale of magnitude of the impact (M):

The magnitude of impact refers to the limit of noise that is considered safe for the health and comfort of the environment, in accordance with

Circular of the Minister of Manpower No.SE.01 / MEN

/ 1978, Regulation of the Minister of Health No.

718 of 1987 and Decision of the Minister of

Environment No. 48 of 1996. Based on these provisions, the amount of tolerable noise level is

55-85 dB (A), and based on the foregoing scale of magnitude of impact can be made as follows:

Magnitude of Impact Interval Scale Score (M)

At the distance of < 55 dB(A) 1 Very

10 m from the little sources of noise, 55 – 70 2 Little

PT Supreme Energy Muara Laboh 519 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Magnitude of Impact Interval Scale Score (M) the level of noise dB(A) of PLTP equipment 70 – 85 dB(A 3 Medium ranges between 80-91 85 – 100 4 High dB (A), hence the dB(A scale of magnitude > 100 dB(A) 5 Very High is categorized as high or equal to 4.

Furthermore, the determination of the significance of the impacts refers to legislation and the 6

(six) criteria of significant impacts. The nature of the significance of the impacts is also expressed in 5 scales of significant impacts which refer to the provisions of ISO (International

Standardization Organization) and Decision of the

Minister of Environment No. 48 of 1996. Pursuant to

ISO, the normal hearing threshold is <25 dB (A), while according to Decision of the Minister of

Environment No. 48 of 1996 the noise level should be <55 dB (A). Based on these limits, the intervals between the noise level of 25 dB (A) and the worst limit of 55 dB (A) which is determined as significant impact. Scales of the significance of

PT Supreme Energy Muara Laboh 520 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the impacts of noise can be described as follows:

Scale of Significane of Impact (I):

Criteria of Properties of Impact No Significant Impact Significance (I)

(1) Number of people PLTP Operator

affected

(2) Area of impact 500 -1,000 m from PLTP

distribution

(3) Duration of impact Noise baseline, during

the life of the

project

(4) Impact intensity Low

(5) Number of None

environmental

components

(6) Cumulation of impact None

(7) Reversibility or None

irreversibility

Significane of Interval Scale Score Impact

During normal < 25 1 Not

operation, noise dB(A) Significant

can be heard from 25 – 40 2 Quite 500 m away, and dB(A) Significant

PT Supreme Energy Muara Laboh 521 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Significane of Interval Scale Score Impact

the closest 40 – 55 3 Significant residential area dB(A

is more than 1 km 55 – 70 4 More away, thus the dB(A significant

scale of impact > 70 5 Very

is = 2 dB(A) significant

Thus, Geothoermal Power Plant (PLTP) operation does not create noise to nearby residential areas and only affect the PLTP operators. Therefore the planned operation of PLTP are not expected to pose a significant impact on the comfort and health of people living around the location of PLTP. Since this activity may change the noise level to quite high (scale 4), the significance of the impact is considered as ‘quite significant’ (scale 2).

b) Quality of Surface Water

Hot water and brine injection activity from the turbine and condenser operation has the potential to increase the pH value of the surface water in the vicinity of the drilling, which means the water becomes more alkaline (pH> 7 valves). Results of

PT Supreme Energy Muara Laboh 522 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW laboratory analysis showed that the current value of the pH of river water still meets Class II Water

Quality Standards (Government Regulation No. 82 of

2001) which ranges from 6.05 to 8.2.

However, the increase in the pH value is not expected to exceed the threshold of water quality standards, namely 9.

Determination of significant impact based on the significant impact criteria is described as follows:

33. The number of people affected. The impact of

operations of PLTP on the pH value directly

creates impact on humans. Therefore, the impact

is categorized as an insignificant negative

impact.

34. The area of impact distribution. Hot water and

brine injection will be done in production and

injection wells so that the affected area is

very small. Therefore, the impact is

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categorized as an insignificant negative

impact.

35. The duration of the impact. The impact does not

occur continuously but rather accidentally

namely if there is a leak in the settling pond

at the injection activity. Therefore, the

effects are categorized as insignificant

negative impacts.

36. The intensity of the impact. An increase in the

pH value of the water of the river at the site

of injection wells is not expected to be high

so that it can be categorized as a

insignificant negative impact.

37. The number of affected environmental

components. An increase in the pH value will

not cause a derivative impact due to its low

intensity, so that it can be categorized as

insignifianct negative impacts.

38. The cumulative nature of the impact. The impact

does not occur continuously, hence it is not

cumulative. Therefore, the impact may be

categorized as an insignificant negative

impact.

39. Reversibility or irreversibility of the impact.

An increase in the pH value in water bodies

PT Supreme Energy Muara Laboh 524 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

will recover naturally so that it can be

categorized as an insignificant negative

impact.

Based on the above description, it can be noted that the quality of the environment is on a scale 3

(moderate) to poor (scale 4), with the significance of impact from quite significant (scale 3) to significant (scale 4).

5.1.4 Post Operation Stage

Post-operation action plan consists of reclamation and mine closure activities that have been regulated in detail in Regulation of the Minister of Energy and Mineral Resources No. 18 of 2008 on

Reclamation and Mine Closure. This Regulation of the Minister of Energy and Mineral Resources defines reclamation as activities aimed at improving or managing the use of land disturbed as a result of mining activities in order that it will function and be of use according to its purpose.

The definition of Mine Closure is an activity which aims to improve usability or to manage the land disturbed as a result of the termination of mining and/or treatment and purification activities to

PT Supreme Energy Muara Laboh 525 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW meet the criteria in accordance with the Mine

Closure Plan document. The impact of the geothermal field development activities with a capacity of 70

MW is the same with that of 250 MW. Thus the estimated impact in the post-operation stage shall refer to Environmental Impact Analysis of development geothermal field of 250 MW capacity based.

5.2 IMPACT EVALUATION

5.2.1 Physico-Chemical Components

Significant impact evaluation is intended to examine the possibility of significant impacts on physico-chemical environmental components. In this

ANDAL (Environmental Impact Analysis), there are

(3) three physico-chemical components of the environment that is affected the most, although not all of them are categorized as significant impact, namely:

 ambient air quality, the presence of H 2 S gas

emissions and dispersion during drilling and well

production test and during the operation of PLTP

 noise, ie the noise exposure of drilling

equipment, production test and equipment of

geothermal power plant, during normal operation

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or in an emergency operation.

 Brines and condensates which are returned into

the reservoir through injection wells, this

project does not create impact on the quality of

river water and groundwater quality.

Planned activities that are likely to make significant impacts on physico-chemical environmental components in the construction stage are as follows:

5.2.1.1 Study of Impact of Drilling and Well Production Test

Steam field is an area where the production of wet steam (2 phases) are conducted before being sent to the PLTP. Components of the activities being the source of the impact and which is located in the steam field area are:

 The production facilities which include drilling

equipment, wellhead, production wells,

separators, Rock Muffler, injection wells, pond

and the supporting facilities.

 Distribution pipeline facilities consisting of

wet steam pipes, dry steam pipes, brine pipeline

and other supporting pipes.

 Supporting facilities of geothermal field

PT Supreme Energy Muara Laboh 527 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

(offsite facilities) including TPS (Temporary

Disposal Area) of solid waste, laydown areas,

offices and other facilities.

The geothermal field is the source of the impact, starting from the drilling process until exploitation well production test. The drilling process can give rise to noise, but the noise propagation is only localized in the vicinity of the drilling rig, hence it has a relatively less significant impact. During the drilling of the well, the propagation of noise reaches Raw Noise

Level of 55 dB (A) at a distance of only about 100 m from the rig which is a working environment of the drilling activities. In addition, during the drilling process there may be also waste water generated, namely drilling water. Drilling water is water with high salinity, hence the TDS (Total

Dissolved Solid) is also high. Waste water is discharged into the injection wells so that the impact is not significant. In addition, the drilling process also results in drilling mud which has high levels of Al oxides, Fe and ,Ca hence the

TSS (Total Suspended Solid) which is also in high concentration, can result in turbidity and crust in the pipeline. Waste water and drilling mud is mixed

PT Supreme Energy Muara Laboh 528 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW with brine (salt water from the Separator), and then discharged into the bowels of the earth through injection wells, so the impact is less significant. The greatest risk encountered by operators is if there is a leak of H2 S gas during the drilling process. Therefore in some places which are exposed to H 2S gas in the wellpad area,

H2S detectors are installed in order to detect the presence or absence of H 2S gas leak. The handling of

H2S gas leak will follow the standard operating procedure for drilling that has been established by

SEML.

Following the completion of drilling, the process of well production test will be performed. Well production test may create noise of a high level, but it can be reduced using Rock Muffler or AFT. If the production test process takes place in the absence of Rock Muffler or AFT, the propagation of noise can be heard at a distance of 1 km from the well pad location. Noise during well production test has less significant impact on the comfort of residential area. In the presence of Rock Muffler or AFT as noise reduces, the propagation of noise can be reduced so that it can only be heard within the maximum distance of 250 m from the Rock Muffler

PT Supreme Energy Muara Laboh 529 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW or AFT ;thus, it only affects the drilling operator. The area around the wellpad is vacant with no settlements, so the noise from the production test with Rock Muffler or AFT as sound proofing is considered as insignificant.

The next impact during the well production test is the release of steam into the atmosphere which yields NCG (Non Condensable Gas), especially in the form of H 2 S gas. At the time of production tests, the release of steam from the Rock Muffler raises

3 the H 2S gas emissions by 4-12 mg / Nm , well below the Standard Quality of H 2S emissions of 35 mg /

3 Nm . With such H 2S gas emissions during production test, H 2S gas is odorless with a radius of over 100 m from the wellpad. Thereby well production test activities have impact on drilling operators only and did not extend to residential areas, therefore, the impact on the health of the environment and environmental comfort is ‘less significant’.

5.2.1.2 Study of Impact of PLTP Operation

A Geothermal Power Plant (PLTP) consists of main processing (main process) facilities and supporting facilities (utilities and offsite facilities). In

PT Supreme Energy Muara Laboh 530 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the PLTP area, the main processing facilities in

PLTP comprise the facilities for operational activities such as follows:

 Steam receiving facilities that includes

receiving header, scrubber, demister and

supporting facilities

 Generation facility which includes steam turbine,

electric generator and transformer (transformer)

in the switchyard.

 Condensate handling facility which includes

condensers, steam ejector, cooling tower and its

supporting units

 Brine and condensate disposal facility which

includes a pump and pipes to drain condensate and

brine into injection wells in the steamfield.

Furthermore Geothermal Power Plant (PLTP) supporting facilities include water treatment units, instrument air system, maintenance workshop

(workshop), fire and safety, warehouse, office, clinic and other facilities.

SGS (Steam Gathering System) is capable of producing 2-phase HP Steam and LP steam so that the selection of the appropriate technology for the

PLTP is dual flash steam cycle technology, both for the operation of steam at low and high enthalpy.

PT Supreme Energy Muara Laboh 531 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

During the operation, a geothermal power plant can create noise and emissions of H 2 S and water evaporation (evaporation loss) of the cooling tower. Therefore, the impact that could become significant is due to emissions and dispersion of

H2S gas from the Cooling Tower stacks. The cooling tower design in detail will be determined at the stage of BED (Basic Engineering Design). However, based on the preliminatry engineering calculation at the FS, it is indicated that H2 S emissions chimney cooling Tower is highly dependent on the design of the L/G ratio, make-up water for cooling tower and the desired H 2S gas emissions during the operation of PLTP.

If the make-up water for water cooling tower in the quantity of 101 tons per hour (tph), the H 2S gas emissions amounted to 34.7 g/Nm3, but if the make- up water for the cooling tower is in the quantity

3 of 100 tph then H 2 S gas emission is 35 g/Nm . The

Quality Standard for PLTP emissions of H 2S gas is 35

g/Nm3, the make-up water cooling tower is a minimum of 100 tph. Make-up water discharge may affect the water requirements of the project where the total water demand of the project would not be

3 more than 130 m /h. Then if H 2S gas emission is 32

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3 g/Nm , the smell of H 2S gas will only be dispersed within a radius of 100 m or one can smell H2S gas in the PLPT area only.

Furthermore, the operation of geothermal power plant may also generate noise from the geothermal power plant equipment. In normal operation, propagation of noise reaching a Raw Noise Level of

55 dB (A) is heard at a distance of less than 300 meters from the source of noise, but at the time of abnormal operation (turbine interference) the propagation of noise can reach a radius of 1 km.

Therefore, it is necessary to install Rock Muffler in order to reduce noise during abnormal operation, so the noise can be reduced to reach 300 m only.

Therefore, the area of the noise buffer zone is set

300 m from the source of noise or a maximum of 500 m. The buffer zone is a vacant land or agricultural land, but not a residential area. Therefore, based on the noise approach it is necessary to choose

PLTP location with a distance of at least 500 m away from a residential area. Thus the environmental components most significantly affected are the ambient air and the noise.

The occurrence of erosion and the subsequent impact of sedimentation is resulting from land preparation

PT Supreme Energy Muara Laboh 533 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW and revegetation activities. When preparing the land, land clearing would potentially cause erosion and sedimentation and the impact is negative. While the land revegetation will decrease erosion and sedimentation, so the impact occurred is a positive impact.

The level of erosion and sedimentation of rivers refers to the calculation on the conditions prior to the construction activities of PLTP Muara Laboh which is classified as good (scale 4) and with the development activities for PLTP Muar Laboh, it decreased to moderate (scale 3). It means there is a decline in the quality of the environment by this activity as much as 1 (one) scale unit. In connection with the occurence of erosion and sedimentation, management is needed to reduce the rate of erosion and sedimentation in rivers.

Land clearing may increase the rate of water runoff, as the source of the impact as a result of land preparation and revegetation activities.

During land preparation, land clearing has potential impact on the rate of water runoff and it is considered as negative impact, while the revegetation of the land instead will decrease in the rate of water runoff, and it is considered as

PT Supreme Energy Muara Laboh 534 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW positive impact.

The rate of surface water runoff based on the condition of vegetation prior to the construction of Muara Laboh PLTP is classified as good (scale 4) and in the presence of Geothermal Power Plant development activities Muara Laboh is decreased to moderate (scale 3). This means a decline in the quality of the environment by this activity is as much as 1 (one) scale unit. With this rate of water runoff, management to reduce erosion and sedimentation in the rivers will be required.

The lowering quality of river water (surface water) due to increase in the content of some parameters of river water may occur as a result of the construction activities of Muara Laboh geothermal power plant. Activity components as a source of impact on river water quality degradation is originating from land preparation, drilling and operation of the turbine. While revegetation activities on land that has been opened instead will improve the water quality of the river.

The quality of river water around the proposed site of the construction of Muara Laboh PLTP, before any activity is classified as good (scale 4) and in the presence of development activities for Muara Laboh

PT Supreme Energy Muara Laboh 535 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW geothermal power plant it is decreased to moderate

(scale 3). This means a decline in the quality of the environment by this activity as much as 1 (one) scale unit. To prevent deterioration of water quality of the river which is located around the proposed construction site of PLTP Muara Laboh, it is necessary to manage water quality to keep it within the quality standards in accordance with the classification.

5.2.2 Biological Component

5.2.2.1 Flora-Fauna Diversity

The impact on terrestrial flora and fauna as an environmental component is resulting from land preparation activities at the time of construction and land revegetation during post operation stage.

During the land preparation the environmental quality of flora and fauna will deteriorate, but after the re-vegetation it will be able to be recovered. However, the recovery will not be the same as the baseline condition or prior to the activity. At the location of the previous activities, the proponent has initiated the revegetation of some places, particularly by planting shade trees on the left and right side of

PT Supreme Energy Muara Laboh 536 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW the main road.

Initially, the environmental condition of flora and fauna is classified as good (scale 4) and during

Muara Laboh PLTP construction activities, it decreases to moderate (scale 3). It means there is a decline in the quality of the environment by this activity of 1 (one) scale unit. Accordingly, it is necessary to manage impacts to flora and fauna during construction, operation and during the post- operation stage.

5.2.2.2 Aquatic Biota Diversity

A decrease in the quality of river water (surface water) may generate a consequential impact on the diversity of aquatic biota of the river. As the source of impact, , the decline of river water comes from the same activity as the decrease in water quality.

The land preparation, drilling and operation of the turbine will cause a reduction in diversity of aquatic biota of the river. While revegetation activities on land that has been opened will rather increase the diversity of aquatic biota of the river.

PT Supreme Energy Muara Laboh 537 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Diversity of aquatic biota of the river around the proposed construction site of PLTP Muara Laboh before any activity is classified as good (scale 4) and in the presence of Muara Laboh geothermal power development activities it is decreased to moderate

(scale 3). This means the decline in the quality of the environment by this activity is as much as 1

(one) scale unit. Due to the decline in -diversity of aquatic biota of the rivers around the proposed construction site of PLTP Muara Laboh, it is necessary to manage river water quality to keep it in good condition.

5.2.3 Socio-Economical and Cultural Components

5.2.3.1 Employment Opportunities

Employment opportunities from construction activities of PLTP Muara Laboh will be created from the recruitment and dismissal of labor for the construction phase as well as recruitment and dismissal of manpower for the operation phase. The impact of the recruitment is positive and the impact of the dismissal of labor is negative. As the people in the community have been employed , upon their termination of employment, it is expected that they are able to open another

PT Supreme Energy Muara Laboh 538 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW business to improve their welfare.

Employment opportunity for the people is initially classified as poor (scale 2); with the presence of

PLTP Muara Laboh Construction activities, it improves the same to moderate (scale 3). It means there is an improved quality of the environment by this activity by 1 (one) scale unit. Accordingly, the impact of employment opportunities needs to be managed optimally.

5.2.3.2 Business Opportunity

The business opportunities are created during the construction of Muara Laboh PLTP together with employment opportunities from the recruitment and dismissal of the labor for the construction phase as well as recruitment and dismisal of labor for the operation stage. The presence of the people and other labor in the community being employed could cause the communities in the surrounding areas to open business for the people’s daily needs. The impact on the business opportunity is a positive impact, but if this activity is no longer in operation, it will cause a loss of business opportunity, so that it will revert to a negative impact.

PT Supreme Energy Muara Laboh 539 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Business opportunities for the communities in the surrounding areas are initially very poor (scale

1); with the presence of Muara Laboh PLTP construction activities it is increased to poor

(scale 2). It means there is an improved quality of the environment by this activity as much as 1 (one) scale unit. In connection with the business opportunities the increase is very small, therefore, it is necessary to manage the impact of the business opportunities in order to be more optimum.

5.2.3.3 Community Income

The construction of Muara Laboh PLTP will lead to an increase in community income as the result of people being employed during the construction and operation stage; in addition, there will be creation of business opportunities for the communities in the surrounding areas. The impact on people's income tends to be a positive impact, but if people do not work anymore or there are no more business opportunities, it will somewhat decrease the income levels.

The income level of the people in the initial condition is classified as poor (scale 2); with the

PT Supreme Energy Muara Laboh 540 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW presence of PLTP Muara Laboh construction activities it will improve to moderate (scale 3).

It means there is an improved quality of the environment by this activity by 1 (one) scale unit.

Accordingly, it is necessary to manageme the impact of employment opportunities which creates a consequential impact on the community income level

5.2.3.4 Social Values and Norms

Changes in social norms and values within the society due to Muara Laboh PLTP construction activities are predicted as a result of the recruitment activities of labor both during the construction and operation stages. This impact is likely to be a negative impact as potentially it would change the social norms and values of local communities because there are labor are not coming from the local area.

The recruitment of labor does not interfere and change the values and social norms of the local community. This is because the workers recruited is also from the local community and workers from outside rarely interact with the community in the surrounding areas because the location of PLTP

PT Supreme Energy Muara Laboh 541 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Development is far from the residential area.

Social values and norms of the local community is initially classified as good (scale 4) and during

PLTP Muara Laboh construction activities it increases to moderate (scale 3). It means there is a decline in social norms and values of society during this activity by 1 (one) scale unit making it a negative impact. In connection with the change of social values and norms of the society, it is necessary to manage these impacts in order to minimize them.

5.2.3.5 Land Tenure

Changes in land tenure is an environmental component that will occur during PLTP Muara Laboh construction activities. It is due to acquisition of the people’s land for the location of activities. Due to the land acquisition, the amount of people’s land that can be used both for plantations and rice fields will be reduced.

Therefore the land will be acquired and certainly compensation will be given in accordance with applicable regulations.

Land tenure for additional production wells do not

PT Supreme Energy Muara Laboh 542 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW interfere with the social norms and values of the society, since the land affected by the additional production wells are not located on indigenous lands/cummunal land in the study area. The land acquisition having been carried out previously by the proponent also did not disturb the system of social values and norms.

Land tenure conditions were initially moderate

(scale 3) and in the presence of PLTP Muara Laboh construction activities especially during land acquisition, it decreases to poor (scale 2). It means there is a decline in land tenure of the community during this event by 1 (one) scale unit making it a negative impact.

5.2.3.6 People’s Perception

Community perception of the land acquisition for the construction of PLTP is quite positive. During

PLTP activity in Alam Pauh Duo village, there are no people who felt aggrieved because their land is affected by the construction of PLTP.

Positive perception/support of the people for the proposed additional production wells (wellpad) of

PLTP is also related to Corporate Social

PT Supreme Energy Muara Laboh 543 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Responsibility (CSR) activities which has been managed quite well. Government Regulation (PP) No.

47 of 2012 regulating the social and environmental responsibility of limited liability companies.

The CSR programs have commenced from 2012 in the communities within the study area with the four focus of activities, namely Education, Health,

Infrastructure Improvement, Community Empowerment and participation program in community activities.

The CSR activities that have been and are being made by the Proponent are as follows:

 Procurement of computers for some schools

 Relocation and construction of traditional

markets

 Rehabilitation of several mosques

 Embroidery Courses.

 Safari Ramadhan in 13 mosques in 4 districts

 Provision of Handi-Talkie Radio Trunking System

for the Police of Solok Selatan District.

 The provision of social aid for flash flood

victims

 Construction of Welcoming Gate in Solok Selatan

District in Ulu Suliti

 Mass circumcision for 50 children in Solok

Selatan.

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 Repair of bridge in Jorong Taratak Tinggi

 Repair of road in Kampung Baru

 Repair of road in Pekonina block 0

 Establishment of MFIs (Microfinance Institutions)

as well as providing training for prospective

small entrepreneurs

 Environmental conservation programs in

cooperation with Agriculture Service Office of

Solok Selatan by providing 1,000 rods of

maccademia bean seeds, etc.

Initially, public perception was moderate (scale 3) and with the geothermal exploitation activities for

PLTP Muara Laboh especially in relation to the land acquisition, it decreases to poor (scale 2). It means there is a decline in land tenure by the people during this event by 1 (one) scale unit making it as a negative impact.

5.2.4 Public Health Component

Activities that make impact on public health is drilling of production and injection wells and production well testing and operation and maintenance of wells and PLTP. Production well tests were conducted during construction and operation stages, while maintanance of production

PT Supreme Energy Muara Laboh 545 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW wells are carried out during the operation phase.

Those activities have impacted the public health components in which public health deteriorates.

The level of public health in initial conditio ns were moderate (scale 3) the presence of PLTP development activities have declined the same to poor (scale 2). It means there is a decline in the quality of the environment by this activity by 1

(one) scale unit. Accordingly, it is necessary to manage impact on public health in order to minimize the same.

Changes in disease patterns occur in the construction stage and the proposed operation of

PLTP Muara Laboh Development Activities. Initially, the condition of the disease in the environment is moderate and the nature of the impact is more siginificant. In the baseline condition, the state of public health were moderate (scale 3). But it changes slightly due to the activities/events which turns it into poor (scale 2), thus there is a decrease in the environmental quality of negative

Based on the result of holistic evaluation, the proposed PLTP Muara Laboh Construction Activities causes environmental degradation by 19.51%. Based

PT Supreme Energy Muara Laboh 546 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW on the scale of environmental quality, and a reduction in the environmental component scale from

4, prior to the activities, to 3, after the activities, or one unit scale. While the average change in the quality of the environment is -0.71 or impacts occurring are small.

The impact evaluation based on the modified Leopold method is shown in Tabel V-1515.

PT Supreme Energy Muara Laboh 547 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Tabel V-15 Matrix of Impact Evaluation using Modified Leopold Method on Geothermal Development Activities for 250 MW Muara Laboh

Geothermal Power Plant

Condition of Environmental Environmental Quality after Operation Predicted Score of Envvironmental Condition and Activities Baseline ence Diffe r ] 1 /I 1 Pre- Post Constru Construction Operation Operation ction

Interpretation of Impact

A.PHYSICS-CHEMISTRY 1. Air Quality 4 2 2 3 3 There is a negative impact with the decrease of 1 12 25 48 3 38 100 38 2 -1 -10 3 2 2 5 5 scale or decrease of 10% in air quality 2. Noise 3 4 4 4 4 There is a negative impact with the decrease of 1 9 25 36 2 16 100 16 1 -1 -20 3 1 1 1 1 scale or decrease of 20% in noise level 3. Erosion and 4 5 2 There is a negative impact with the decrease of 2 Sedimentation 4 16 25 64 4 2 4 18 50 36 2 -2 -28 scales or decrease of 28% in erosion and sedimentation 4. Surface Water Run- 4 1 4 There is a negative impact with the decrease of 2 16 25 64 4 20 50 40 2 -2 -24 off 4 4 4 scales or decrease of 24% in run-off rate 5. Surface Water Quality 3 2 2 2 2 4 There is a negative impact with the decrease of < 1 3 9 25 36 2 2 3 2 2 4 34 125 27 2 0 -9 scale or decrease of 9% in surface water quality (river water) B BIOLOGY 1. Diversity of Flora and 4 2 3 There is a negative impact with the decrease of 2 Fauna 4 16 25 64 4 2 3 13 50 26 2 -2 -38 scale or decrease of 38% in diversity oof terrestrial flora and fauna 2. Diversity of Aquatic 4 2 2 2 4 There is a negative impact with the decrease of 3 Biota 4 16 25 64 4 1 1 1 3 18 100 18 1 -3 -46 schales or decrease of 46% in diversity of aquatic biota

PT Supreme Energy Muara Laboh 548 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Interpretation of Impact

% Scale % Scale (B) Testing Environmental Components Maintenance Land Acquisition Labor Recruitment Labor Recruitment Maximum Score (all activities) Land Preparationtion Percentage rate (Column 4/5 x 100%) Termination of Employment Termination of Employment Maximum Score of Condition x significance Operation of Turbine and Condenser Rehabilitation and Revegetation of Land Weighted Environmental Component Quality Scale (A) Tota Score of All Activities (total M1 x I1) of all Activities Score of scale of environmental condition x scale of significance Condition of Environmental Components (Scale)/Significance (Scale) [M Production and Injection Well Drilling, Production Well Test Production and Injection Well Drilling, Production Well Test and Well 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 C. SOCIO-ECONOMIC, CULTURE AND PUBLIC HEALTH 1. Employment 2 3 2 3 2 There is a positive impact with the increase of 3 10 25 40 2 41 100 41 3 1 1 Opportunity 5 4 3 5 4 scales or increase of 1% in employment opportunity 2. Business Opportunity 1 2 1 2 2 There is a positive impact with the increase of1 5 25 20 1 30 100 30 2 1 10 5 3 4 5 5 scale or increase of 10% in business opportunity 3. Community Income 2 3 2 3 2 There is a positive impact with the increase of 1 10 25 40 2 46 100 46 3 1 6 5 5 5 5 3 scale or increase of 6% in community income 4. Social Values and 4 4 3 4 There is a negative impact with the decrease of 1 20 25 40 21 50 42 3 -1 -38 Norms 5 3 3 scale or decrease of 38% in social values and norms 5. Land Tenure 3 3 2 There is a negative impact with the decrease of 1 4 12 25 48 4 8 25 32 2 -1 -16 scale or decrease of 16% in land ownership and tenure 6. Community 3 2 2 2 There is a negative impact with the decrease of 1 15 25 60 3 18 75 24 2 -1 -36 Perception 5 3 3 3 scale or decrease of 36% in community perception D. PUBLIC HEALTH 1. Public Health 3 2 2 There is a negative impact with the decrease of 1 12 25 48 3 16 50 32 2 -1 -16 4 4 4 scale or decrease of 16% in public health Conclusion of Evaluation Result: Total Score 178 337 The result of evaluatoin of the Planned Developmen Maximum Score 350 1075 Activities for 250 MW Muara Laboh Geothermal Percentage (%) 50.86 31.35 Power Plant is that it causes decrease in Scale 3 2 environmental quality by 19.51%, that is from scale Scale Difference -1.00 3 prior to the presence of the activities to scale 2 Difference (%) -19.51 after the presence of the activities or the quality of Average Quality -0.714 the environment decreases by 1 scale unit or at an

PT Supreme Energy Muara Laboh 549 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Interpretation of Impact

I = Score for Environmental Significance Scale

Environmental Quality Scale: 1 = very poor Environmental Significance Scale: 1 = Insignificant

2 = poor 2 = quite significant

3 = moderate 3 = significant

4 = good 4 = more significant

5 = very good 5 = very significant

PT Supreme Energy Muara Laboh 550 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

5.3 DIRECTIVES FOR THE MANAGEMENT OF ENVIRONMENTAL IMPACT

Socio-cultural components which is assumed to be affected is the land ownership and tenure during the pre-construction phase, namely in land acquisition activities. There are still groups of people who perceive that the construction of

Muara Laboh PLTP is located on communal land of the village. The land used for the construction of PLTP is already cultivated with crops and rice mixture by people of Alam Pauh Duo village.

The ownership and tenure of the land as HGU (Right to Use) which is owned by the Government is granted to SEML for the construction of PLTP Pauh Duo District, so that the tenure of a relatively wide land by SEML on ex-HGU is only limited to the right to use land. To avoid misunderstanding the following management shall be applied:

 Causality between the planned activities and environmental baseline and the positive and negative impacts it

creates.

 The characteristics and nature of significant impacts, both positive and negative, will be continuous during

activity time limit.

 Groups of people who will be affected by negative impact and the group of people who will be affected by positive

impact, the identification of gaps between the desired changes and changes that may occur as a result of the

business or development activities.

 The area which will be potentially affected by this significant impact will only be of local nature or it may extend

to a regional or national scale.

Evaluation of impact is directly aimed to fully understand the causal relationship between the planned activities with environmental components affected by significant impacts. Therefore, the source of the impact that has caused significant negative impacts on environmental components could be identified, as well as the nature of impact whether it is a direct impact or indirect impact. A causal relationship can be described in a flow chart of significant impacts so

PT Supreme Energy Muara Laboh 551 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

that the source of the impact and the significant impacts resulted therefrom and environmental components which are the most significant impacts could be identified. Significant impacts in the Addendum to the Environmental Impact Analysis and Environmental Management Plan – Environmental Monitoring Plan (RKL-RPL) are described in the flow chart of significant impacts, while the impact of a relatively less important impact is not included in this figure. Flowchart of significant impact which serve as a basis for the evaluation of significant impacts may be presented in Figure V-12 dan

Figure V-13.

Further, based on causal relationship depicted in the flow chart of significant impacts, it can be determined that the direction of the management and monitoring of each of the significant impacts is indeed required, and it will also serve as a basis for the preparation of RKL-RPL.

PT Supreme Energy Muara Laboh 552

PRECONSTRUCTION CONSTRUCTION STAGE STAGE OF STAGE ACTIVITIES

TYPES OF ACTIVITIES Labor Recruitment Mobilization of Land Acquisition Equipment and Land Clearing Materials

SECONDARY Change of Change in Change of IMPACT Change of social Community surface water values and norms Couity’s Perception Income quality

TERTIARY IMPACT Change of Distubance to Community aquatic biota Perception

Figure V-12 Flow Chart of Significant Impact of Geothermal Exploitation Activities for Muara Laboh 250 MW PLTP in the Pre- Construction and Construction

PT Supreme Energy Muara Laboh 553 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

OPERATION STAGE POST-OPERATION STAGE STAGE OF ACTIVITIES

TERTIARY Change of Change of IMPACT Disturbance to Community Community Aquatic Biota Perception Perception

Figure V-13 Flow Chart of Significant Impact of Geothermal Exploitation Activities for Muara Laboh 250 MW PLTP in the Operation and FPostigure Operation V-13 FlowStage Chart of Significant Impact of Geothermal Exploitation Activities for Muara Laboh 250 MW PLTP in the Operation

PT Supreme Energy Muara Laboh 554

5.3.1 Guidelines and Direction of Impact in Pre Construction Stage

1. Direction of Management of Land Ownership

The socio-cultural components expected to be adversely affected are land acquisition during pre construction activities. There are still groups of people who perceive that the construction of Muara

Laboh 250 MW PLTP is located on communal land of the village. The land used for the construction of

PLTP is already cultivated with mixed crops and paddy field of the people of Alam Pauh Duo village.

Ownership and tenure of the land as the HGU (Right to Use) land owned by the Government is granted to

SEML for the construction of PLTP Pauh Duo

District, hence the tenure of a relatively wide land by SEML on ex-HGU is only limited to the right to use of the land. To avoid misunderstanding the following and or manage the impact which will be made, an institutional approach shall be applied, among others:

 To disseminate the land acquisition plan with

reference to Presidential Decree No. 36 of

2005.

 Land acquisition must be done wisely and

equitably in accordance with the regulations

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applying mainly on the process of land

compensation and productive plant of the

people.

 Consideration must be given to the aspirations

of customary community related to land

acquisition as well as with landowners,

government districts, Nagari and KAN and Ninik

Mamak.

2. Direction of Management of Community Perception

Land acquisition activities may have an impact on the perceptions and attitudes of the local community, as a result of compensation that may not be in accordance with applicable regulations.

Social and cultural issues need to be assessed as objectively as possible, so as not to disturb the social impact of culture, as for basic management of social and cultural impacts are:

 To identify the ownership of the land to be

acquired.

 To directly acquire land from the owners

through negotiations with wage compensation

paid for the cultivation of paddy fields and

gardens / fields which are acknowledged by

PT Supreme Energy Muara Laboh 556 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Jorong Wali, Wali Nagari, Ninik Mamak, KAN Alam

Pauh Duo or Duo Pauh Nan Batigo.

 Following up the aspirations of customary

community related to land acquisition.

5.3.2 Guidelines and Direction of Impact in Construction Stage

Scope of construction work includes the earthworks, civil works and concrete structures and steel structures and mechanical and electrical work (ME) on steamfield area or area of geothermal power plant. Earthwork on erosion-prone areas can cause erosion and increase surface water runoff which then brought sediment load into the river so that it created impacts on the water quality.

Additionally, construction requires construction materials, so that the mobility of trucks transporting construction materials can have an impact on air quality and noise. The guidelines for the management of civil construction impacts that can become a reference RKL-RPL is as follows:

1. Direction of management of earthworks during

construction

The project area which has inclination of of 25-40% should be protected in order to provide benefits as

PT Supreme Energy Muara Laboh 557 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW a protected area thereunder. There are concerns that the earthworks on the sloping area may lead to the formation of a little open area that may be prone to erosion. Construction of access roads, wellpad area and the area of geothermal power plant in areas prone to erosion can cause erosion, increased surface water runoff and ending with the rising river water quality. Erosion cannot be prevented completely because it is a natural process, so that erosion prevention is only an endeavor to control erosion to prevent any disaster. Soil erosion management plan to minimize the load of sediment entering the river are as follows:

a) Controlling the flow of surface water from

rainfall.

The Management which may be implemented to control the runoff from rainfall is as follows:

 Constructing a bund (mound) and water lines

which is parallel to contour lines with the

objective to restrain the flow of surface

water.

 Constructing trenches to channel and direct the

water towards the catch pond in an area prone

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to erosion, which is on the edge of the access

road, in the wellpad area and in the area of

PLTP.

 Constructing a catchpond to stop the flow of

water passing through the trenches so that the

land material carried away by the flow is

retained and deposited in the catchpond. At one

point the catchpond will experience silting, so

the base of the catchpon needs to be dredged.

b) Controlling the erosion technically and

vegetatively

Management that can be done to control erosion by technical means and vegetative as well as to the preservation or conservation of the land is as follows:

 Tillage and organic fertilizer to increas e

permeability of the soil to make it more loose

so that rainwater easily seeps into the soil.

 Planting perennials (trees) perpendicularly to

the direction of flow (strip cropping).

 Planting perennials parallel to contour lines

(contour strip cropping). Planting is aimed to

reduce or restrain the flow rate of the water

and hold soil particles are transported in the

PT Supreme Energy Muara Laboh 559 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

flow of rainwater.

 Closing open land which has a steep slope with

perennials (buffering)

With the management of erosion and surface water runoff, the impact on water quality can be minimized.

c) Management of flora dan fauna

Impacts on biological components may disturb the the diversity of protected flora and flora. This changes occurs in natural forest ecosystems that will affect the stability of ecological functions.

Directives on environmental management to reduce the impact are as follows:

 Maintaining flora / vegetation on a location

that is not utilized for the construction of

PLTP.

 The clearing of land from cover vegetation

should be implemented gradually in accordance

with the plan of activities.

 Enriching the vegetation in the open forest

area to replace flora/vegetation lost due to

the activities.

PT Supreme Energy Muara Laboh 560 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

 Doing revegetation on empty area (without cover

vegetation) which are not used for the purposes

of activities.

 Placing announcement board prohibiting the

catching of protected animals / fauna.

 Cooperating with relevant agencies in

maintaining forest / TNKS from illegal logging.

2. Direction of management of drilling and

production test activity

The drilling process may generate drilling waste mainly in the form of used drilling mud and drill cutting. Later production testing can create noise and emissions of H 2 S gas. Without proper management, the process of drilling and production test can result in environmental losses. Therefore, in order to minimize the possibility of a significant impact, it is necessary to manage the impact appropriately. Guidelines for the management of the impact of drilling and production test that can be a reference to RKL - RPL are as follows:

a) Direction of management of waste water from

drilling

The waste water from drilling generated from the

PT Supreme Energy Muara Laboh 561 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW washing of drilling equipment and floor of the rig during drilling activities, which lasts about 60-90 days is estimated at 90 x 32.4 m3/day or equivalent to ± 2,916 m 3. The drilling waste water has high TDS and TSS contents and therefore should not be discharged directly to the environment. Therefore, based on the technical and economic approaches, the waste water is collected in a settling pond, and along with the brine it will be returned to the earth through the injection wells, so there is no negative impact caused by the drilling waste water.

Handling of used drilling water is actually the impact of the proposed management (mitigated impact) according to the SOP that has been set by

SEML.

b) Direction of management of used drilling mud

Used drilling mud is mud that cannot be used anymore because it does not meet the technical specifications as drilling mud. The used drilling mud is not reusable, and it is managed by piling, and utilized for construction material mix or carried out in accordance with the applicable regulations on Non Hazardous and Toxic waste treatment.

PT Supreme Energy Muara Laboh 562 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

c) Direction of the management of drilling cutting

Drill cutting, in accordance with Regulation No.

101 of 2014 on Treatment of Hazardous and Toxic

Waste, is categorized as Non-Hazardous and Toxic

Waste, hence the drilling cutting will be managed in accordance with the applicable regulations on the treatment of Non Hazardous and Toxic Wastes, among others: to be utilized internally as a mixture of construction materials and/or piled and/or for the purpose of the company's CSR program and/or managed in accordance with the applicable regulations on treatment of Hazardous and Toxic

Wastes.

d) Direction of Domestic Waste Water treatment

Efforts to manage domestic waste (biological waste from Bathing, Washing and Toilet (MCK)) which is generated from residential activity and employment activities will be accommodated in a septic tank

(1.5 m x 2 m x 2 m). The decomposition process takes place in an anaerobic septic tank, whereas the runoff water with BOD content is seeped in the land covered with perennial plants. Thus the BOD of water runoff can be absorbed into the land which is

PT Supreme Energy Muara Laboh 563 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW covered with the perennial plant. Thus the BOD of water runoff is absorbed by the plan and does not seep into the ground water, instead the plants have many leaves because the waste water also contains potassium, phosphorus and organic nitrogen which serves as plant fertilizer.

e) Direction of solid waste management from labor

activities

Solid waste from labor activity in the form of materials which were used for wrapping/packing materials that is easily biodegradable for example food and beverage wrapping, bags of mud, cement bags and wooden/cardboard packing will be collected and burned in a garbage container (0.75 m x 0.75 m x 1 m). Then materials which are not easily biodegradable, such as plastic containers and plastic wrapping will be collected and the waste from the materials that were used for wrapping which are not easily degradable will be transported to landfill (Final Waste Disposal) of Solok Selatan

District or sold to the users of the used materials.

f) Direction for the treatment of H2S gas emission

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during drilling

H2S gas emitted from formation water with the drilling mud during drilling activities will be managed as follows:

 H2S gas that is contained in the drilling mud

is dissolved in a suspension of calcium

hydroxide [Ca (OH) 2] in a mud container, thus

forming a sulfide salts.

 In respect of free H2S gas emissions of which

can not be estimated, one of the actions that

can be taken is to temporarily suspend the

drilling activities, if H 2S gas emissions

exceeds safety requirements.

Critical situation during the drilling takes place when there is an accumulation of free H 2S in a high level exposed uncontrollbly from drilled wells and it could cause fatality to the drilling operator.

Therefore, preventive efforts that can be done to detect the presence of free H2 S gas as early as possible are as follows:

 Equipping the drilling installation with a

large capacity air blower (fan), which is

directed in the direction of the wind.

 Installing the H 2S gas sensor in certain places

such as: shale shakers, mud tanks and rig

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floor.

 Setting the H 2 S gas sensor at concentrations

that could endanger human life on the threshold

of = 10 ppm H 2S. On such threshold, the

overpowering bad odor will arise that results

in the occurrence of irritation of the eyes,

nose and throat (indication: burning eyes).

Availability Breathing Apparatus (BA) and personal

H2S gas detector at the drilling location for human safety. At levels of 160 ppm, H2S gas was odorless, but could result in fainting or blackouts for some time.

H2S gas emission during drilling is not an impact, but it is more accurately described as a disaster or accident because it is unpredictable.

g) Direction of the management of H 2S gas emission

during production tests

Before the production test the level of H 2S in geothermal steam needs to be measured. If the level of H 2S are relatively stable at a level of less than

2% then production test will be carried out.

Conversely, if the level of H 2S is too high, i.e well above 5%, then production test can be carried

PT Supreme Energy Muara Laboh 566 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW out with special treatment, for example by installing the stack higher, having more H2S detectors and all employees using H2S protective masks and should be on a standby position for evacuation if H 2S exceeds the threshold of work safety. H 2S gas at the level of 2% or maximum 5% would give less significant impact and there is no risk to the safety and health of workers. The level of H 2S in Muara Laboh geothermal steam is ranging between 0.6 and 0.7% NCG and thus there is no impediments in production tests.

h) Direction of management of noise during

production test

The production test may generate very loud noise, and the noise needs to be mitigated by noise reducing equipment called Rock Muffler. Silencer as noise reduces is not suitable for wet steam, but is only suitable for dry steam. By installing the Rock

Muffler noise can be controlled within a radius of about 250 m from the position of Rock Muffler.

During this time the use of Rock Muffler is considered effective to reduce noise, although Rock

Muffler is only able to reduce noise to 80-85 dB

(A). For noise at this level, the propagation of

PT Supreme Energy Muara Laboh 567 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW noise can be controlled within the limit of the project or the work environment so it does not create an impact on the residential areas located nearby the project site.

5.3.3 Guidelines for the Management of Impact of the Operation of PLTP

Operation of PLTP may generate loud noise from the operating equipment namely Steam turbine,

Transformer and Cooling Tower. At the time of normal operation, propagation of noise of 55 dB (A) can be heard up to 300 m, but when turbine interruption occurs, the noise propagation can be heard up to 1 km. Therefore it is necessary to install Rock Muffler as a noise reducing equipment up to the limit of 300 m from the noise source.

In addition, the operation of PLTP can also generate emissions of NCG (Non Condensable Gas), primarily H2S gas emissions that escapes into the atmosphere through the Cooling tower stack. H 2S emissions from the stack of the Cooling tower is approximately 34.7 mg/Nm 3 which is still under the

3 Standard of 35 mg/Nm , so that the H 2S gas dispersion in ambient air is only about 100 m from the geothermal power plant.

Therefore, the direction of the management of H2S

PT Supreme Energy Muara Laboh 568 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW emissions and noise during the operation of geothermal power plant can be applied as follows:

1. Direction of management of H 2S gas emission

during the operation of PLTP

Dry steam coming out of Separator will rotate the blades of a turbine coupled with a generator so as to generate electrical energy.

Fluid that has come out of the turbine will then enter the Condenser with vapor fraction of about

80%, and because of the expansion process of pressure, within a short time the steam will condense into water. Extreme changes in the specific volume of steam into water within a short time will create a vacuum in the Condenser. NCG presence in Condenser may cause Condenser vacuum conditions unable to be achieved optimally, and further resulting in the declining performance of geothermal power plant. Thus in order to maintain the vacuum condition in the Condenser, the NCG must be removed continuously through a gas extraction system called Steam ejectors. NCG gas is then separated from Steam Ejector and discharged into the ambient air through a chimney of the Cooling

Tower in the form of emissions of CO 2 and H2S gas

PT Supreme Energy Muara Laboh 569 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW mixed with water vapor (evaporation losses).

Condensation process in the condenser is done by flowing cold fluid (ambient temperature) into the

Condenser so that the cold fluid will absorb some heat from the fluid in two phases so that the phase of the whole fluid is changed into saturated water.

Therefore the fluid coming out of the Condenser is saturated water, but the temperature of the fluid is relatively the same as the initial temperature when entering the Condenser, because the release of heat (latent heat) just enough to change the phase, but not enough to absorb heat (sensible heat) to lower the temperature. In order to get a liquid fluid which can be used to cool the condenser, the hot fluid that comes out of this Condenser first need to be cooled in the Cooling Tower to near room temperature, after which it can be recirculat ed into the Condenser. Cooling water from the Cooling

Tower can be used to absorb heat latent heat and sensible heat. Therefore, it can save the use of cooling water (fresh water). In this case the use of fresh water serves only as make-up water for

Cooling towers. After understanding the extraction process NCG and the cooling systems of Condenser and Cooling Tower, the direction of the management

PT Supreme Energy Muara Laboh 570 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW of H2S gas emissions is as follows:

 Design of L/G related to a flow rate Circulated

cooling water for Cooling Tower shall allow the

air flow rate to control gas emissions in

accordance with the target of the operation of

the geothermal power plant

 The magnitude of the ratio L / G will also

determine the make-up water flow for Cooling

Tower which will then affect the water usage of

the geothermal power plant. The relationship

between make-up water and H 2 S gas emissions is as

follows:

Cooling Tower Make H 2S gas

Up Water emission

(t/h) (mg/Nm3 )

70 49,5

80 44,2

90 39,7

100 35,0

110 31,3

Quality Standard of H 2S gas emissions is 35 mg /

Nm3, the optimum make-up Cooling Tower is around 100 t / h. The total estimated project water demand is estimated not to exceed 130 m 3 / h.

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2. Direction of management of noise during the

operation of PLTP

The highest source of noise is a couple of

Geothermal Steam Turbine and Generator units which are in the enclosed space so as to reduce noise.

Then the next noise source is a transformer

(Transformer) which uses the air conditioner and

Cooling Tower located in the open area. In the normal operating state, noise can be heard up to a radius of 300 m, but in the event of interruption, the turbine noise can be heard as far as 1 km. In the event of disruption of the turbine, all the steam discharged into the atmosphere through the release valve causing squeaky voice like a whistle at high frequencies. Therefore, the efforts to manage the noise is as follows: a. During normal operation

Propagation of noise during normal operation

can reach a radius of 300 m. Therefore a radius

of 300 m is defined as the noise buffer zone,

accordingly, the area must be vacant and free

from residential areas.

b. During the disturbance to turbine

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During distrubance to the turbine, there will

be a sudden extreme rise in vapor pressure, so

the pressure will automatically dump valve

(release valve) opens and the valve opening

will cause high frequency noise. Therefore, the

propagation of noise in the event of

disturbances turbines can peak at 1,000 m

radius. To overcome the noise, the water vapor

off released through the release valve of the

geothermal power plant shall be transmitted

through the Rock Muffler as noise suppression,

making the noise only affects the radius of 300

m from the noise source. Furthermore, a noise

buffer zone with the distance of 300 m defined

as an area that is free from residential areas,

but it may be used for agricultural areas.

3. Direction for the handling Cooling tower sludge

Cooling Tower Water needs to be maintained so

as not to form crust and moss in Cooling Tower.

Therefore, for the maintenance of the Cooling

Tower, it is to be injected with scaling

corrosion inhibitor and phosphate-based

inhibitors periodically. In addition, biocide

of the type of triazine or phosponium need to

PT Supreme Energy Muara Laboh 573 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

be injected until residual chlorine ranged from

0.3 - 0.5 ppm. Then the pH is maintained

between 7.8 and 8.2 and SiO 2 content should not

exceed 150 ppm. However, since Cooling Tower

has always generated sludge, once a year, the

Cooling Tower needs to be cleaned from the

sludge. Sludge is composed of dust particles

and the dissolved H 2S gas which is oxidized to

form sulfide precipitates, whereas phosphate

and chlorine remains soluble in water Cooling

Tower. Once a year there is as much as 1.0 to

2.5 m 3 of Cooling Tower sludge accummulated. The

sludge volume is very small thus its management

is not bothersome. Sludge can be mixed with

water condensate, and then channeled into the

bowels of the earth through the injection

wells. Thus the mud from Cooling Tower does not

create any impact on the environment.

4. Direction of Management of Social, Economical,

and Cultural Impact

As for the direction of environmental management to social, economic and cultural aspects as well as public health are as listed below:

 To establish communication between the company

PT Supreme Energy Muara Laboh 574 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

and the community that extends beyond the land

affairs, it shall also provide information about

employment opportunities in a transparent manner,

the amount of labor and the qualifications

required and the selection process.

 Efforts like this can foster a positive

perception of the community of the project

because people can directly feel the benefits of

geothermal development in these locations. The

presence of the project makes the people

anticipate increase in their income. Therefore,

in the recruitment of workers, the company does

need to give priority to local people, as long as

they meet the required qualifications and meet

the the labor criteria determined by SEML and

contractors.

 To seek to assist the people in increasing their

income, not only increasing the chance of people

getting a job at the project site, but also

assist in developing the trade and services.

People need to get coaching and training in

business groups so that they can together improve

their livelihood.

 SEML fully supports community based development,

especially in empowering the local economy. CSR

PT Supreme Energy Muara Laboh 575 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

(Corporate Social Responsibility) can be used for

the community development program. CSR management

is implemented by stakeholders (SEML, communities

and local governments) under the principle of

consultation and cooperation. The use of CSR in

the community development program is focused on

four areas, namely: health, education, economic

empowerment and environmental conservation.

5.3.4 Guidelines for and Directions of Management of Impact during Post Operation Stage

In accordance with the Regulation of the Minister of Energy and Mineral Resources No. 18 of 2008 on

Mine Reclamation and Closure, the proponent is obliged to prepare Reclamation and Closure documents. In the preparation of these documents, the Company should also involve the local government, the people and academicians. However, a guideline for the direction of impact management during post-operation stage can be described as follows:

1. Direction of management of termination of

employment

Prior to the closure of geothermal development, the

PT Supreme Energy Muara Laboh 576 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Company needs to provide specific skills to the workers so that they can still work in the community even when they have retired later. With this kind of preparation it is expected that the workers can maintain their life so it does not have a negative impact upon the dismissal of the manpower.

2. Direction of management of post development of

geothermal

As social responsibility of the Company to the community, the company will involve the communities affected by the closure of geothermal development in the preparation of the proposed closure of the geothermal exploitation. Thus people who have been involved in geothermal exploitation do not feel that they miss something from the geothermal development even though it is closed forever.

3. Direction of management of

rehabilitation/revegetation

Rehabilitation/revegetation at the closure of geothermal developmet includes the rehabilitation and revegetation of the area, to ensure that the

PT Supreme Energy Muara Laboh 577 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW post development of geothermal landscape remains safe and stable from the standpoint of physical chemistry, geochemistry and ecology. Then the plan for the use of the land post sustainable geothermal needs to be developed, agreed and explained satisfactorily to the government (central and regional) as well as communities affected by the closure of geothermal. Thus the post-reclamation land can be used as much as possible for the welfare of the people.

4. Direction of the management of remaining wastes

and chemicals.

Just before the closing of geothermal development activity, the company will process the residual waste and residual chemicals in order to minimize the residual impact. Since the design of the construction, it has been decided that the project to the extent possible will not use chemicals that are classified as Hazardous and Toxic Materials so as to facilitate the handling of residual chemicals after geothermal exploitation.

5. Direction of management of assets from the

former project

PT Supreme Energy Muara Laboh 578 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

Sale or transfer of assets from the former project will be managed by using the following method:

 Sales agreement in advance through tender or

public auction. The Company sold all the assets

of used items that include machinery, buildings

and equipment with a system of contracts to

third parties.

 Sell and/or donate a used furniture, equipment,

fences and water wells that may be useful for

the community so that they do not have to be

dismantled.

 Local Government may prevent the access road

and other buildings from being torn down

because it can be used by the local government.

Upon the closing of the mine and the end of

Cultivation Right on Land(HGU), all assets are returned to the local government which is acting for and on behalf of the State with the task of utilizing the land as much as possible for the welfare of the people.

The management shall to ensure that the assets can be transferred clearly to those in need, without causing any additional liability for the company.

PT Supreme Energy Muara Laboh 579 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

5.4 RECOMMENDATION FOR ENVIRONMENTAL FEASIBILITY

Under the baseline condition of each component of the environment and the predicted impacts on environmental components based on each source of impact or activity as the source of impact, an evaluation is conducted by using the modified

Leopold method, indicating that Muara Laboh PLPT

Development Activities may have both positive and negative impacts. The positive impact generated is necessary to be managed to improve the same, while the negative impact can be managed to do minimize the same.

Results of the study and review of Addendum to

Environmental Impact Analysis and RKL-RPL documents, shows that geothermal exploitation for

250 MW Muara Laboh PLTP of PT Supreme Energy Muara

Laboh may be declared as environmentally feasible.

The factors expressing these activities to be environmentally feasible are:

 The Proposed Geothermal Exploitation Activity

the 250 MW Muara Laboh PLTP has complied with

the Regional Spatial Plan of Solok Selatan

District.

 Policies for the protection and management of

environment and natural resources (PPLH & PSDA)

PT Supreme Energy Muara Laboh 580 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

for geothermal activity for Geothermal Power

plant of 250 MW Muara Laboh PLTP have complied

with the laws and regulations.

 Detailed forecast of the magnitude and

significance of the impact viewed from

biophysical chemistry, social, economic,

cultural, spatial and community health impact

aspects at the pre-construction, construction,

operation, and post-operation stage of

Geothermal Development for 250 MW Muara Laboh

PLTP is between 1 to 2 scale unit or the impact

is relatively small.

 The results of holistic evaluation of all

significant impacts as interrelated unity and

which influence one another hence the balance

of the negative and positive significant

impacts of Geothermal Development for 250 MW

Muara Laboh PLPT is determined as -0.71 or

relatively small impact.

 The capacity of the proponent as an entity in

charge of the activity to mitigate negative

impacts that will result from the business

and/or activity which has been planned is based

on the technological, social and institutional

approach.

PT Supreme Energy Muara Laboh 581 Addendum - Environmental Impact Analysis (ANDAL) and Environmental Management Plan-Environmental Monitoring Plan (RKL-RPL) of Geothermal Exploitation Activities for Muara Laboh Geothermal Power Plant (PLTP) 250 MW

 Social values or views of the people as a

result of the proposed Geothermal Development

Activity for 250 MW Muara Laboh Geothermal

Power Plant can be managed, so that the impact

can be minimized.

 The impact of the disruption to key species

ecological entity, the ecological importance

value, the economic importance value and the

scientific importance value resulting from the

proposed Geothermal Development Activity for

250 MW Muara Laboh Geothermal Power Plant is

able to be managed.

 The proposed Geothermal Development Activity

for 250 MW Muara Laboh Geothermal Power Plant

do not cause disruption to the business and/or

activities that have existed around the

Proposed Geothermal Development Activity for

the PLTP Muara Laboh 250 MW.

The carrying capacity and environmental carrying capacity of the location of the proposed Geothermal

Development Activities for 250 MW Muara Laboh

Geothermal Power Plant which is not exceeded after the management is in accordance with management directives.

PT Supreme Energy Muara Laboh 582

CHAPTER VI ENVIRONMENTAL MANAGEMENT AND MONITORING PLAN (RKL-RPL)

6.1. ENVIRONMENTAL MANAGEMENT PLAN

6.1.1 Preconstruction Stage

6.1.1.1 Socio-Economic and Culture Components

6.1.1.1.1. Land Tenure a. Environmental Impact to be Managed

. Changes in land tenure. b. Sources of Impact

. Source of impact comes from land acquisition. Most of

the land had been acquired during the exploration

stage. c. Indicators of Environmental Management Success

. Indicator for success of management is that the

changes in land tenure that does not cause conflict in

the community.

Form of Environmental Management

Environmental management programs that need to be

implemented to prevent or mitigate potential impacts

will be based on a socio-economic approach, including:

PT Supreme Energy Muara Laboh 583 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Conducting dissemination of land acquisition plans in

accordance with Presidential Regulation No. 36 of

2005,

. Conducting land acquisition wisely and fair in

accordance with applicable laws, particularly the

compensation for land and productive plants to

communities,

. Considering the aspirations of customary community

regarding land acquisition with land owners, sub-

district government, Nagari, and KAN, as well as Ninik

Mamak. e. Locations for Environmental Management

. In the vicinity of the site, including Nagari Alam

Pauh Duo and Pauh Duo Nan Batigo, Pauh Duo

Subdistrict, Solok Selatan District. f. Timing and Period of Environmental Management

. Environmental management will be performed during the

pre-construction stage. g. Institutions for Environmental Management

1) Implementing Party : PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 584 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Government of Pauh Duo Subdistrict,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo, and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.1.1.2 Community Perception a. Environmental Impact to be Managed

. Negative perception of communities at pre-construction

stage. b. Sources of Impact

. Source of impact comes from land acquisition. Most of

the land had been acquired during the exploration

stage.

PT Supreme Energy Muara Laboh 585 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Indicators of Environmental Management Success

. Less negative perceptions towards land acquisition. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Identification of ownership of the land to be

acquired.

. Conducting land acquisition directly to the land

owners through negotiation for compensation for

cultivation fees/income for paddy fields and

plantation/crop fields, acknowledged by Wali Jorong,

Wali Nagari, Ninik Mamak, KAN Alam Pauh Duo and Pauh

Duo Nan Batigo.

. Following up the aspirations of the customary

community related to land acquisition. e. Locations for Environmental Management

. In the vicinity of site, including Nagari Alam Pauh

Duo and Pauh Duo Nan Batigo, Pauh Duo Subdistrict,

Solok Selatan District. f. Period of Environmental Management

PT Supreme Energy Muara Laboh 586 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental management will be performed during the

pre-construction stage. g. Institution of Environmental Management

1) Implementing Party : PT Supreme Energy Muara

Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Government of Pauh Duo Subdistrict,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo, and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

PT Supreme Energy Muara Laboh 587 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

6.1.2 Construction Stage

6.1.2.1 Physical and Chemical Components

6.1.2.1.1 Ambient Air Quality a. Environmental Impact to be Managed

. Changes in air quality. b. Sources of Impact

. Production well and injection well drilling,

production well testing, and construction of

geothermal power plant. c. Indicators of Environmental Management Success

. Air quality from fugitive emissions and dispersed TSP

meet TSP ambient quality standard pursuant to

Government Regulation No. 41 of 1999 (ambient TSP

standard < 230 µg/Nm3),

. H2S gas emission meets the standard (Regulation of the

Minister of the Environment No. 21 of 2008 on H2S

emission (< 35 mg/Nm3),

. Odor level meets the H2S standard (Minister of

Environment Decision No. 50 of 1996 - H2S odor level <

28 µg/Nm3). d. Form of Environmental Management

PT Supreme Energy Muara Laboh 588 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Securing the well location and setting a safe zone

limit for surrounding residents according to the SOP

of SEML,

. Providing safety equipment for workers in the vicinity

of the wells,

. Installing H2S monitoring equipment at production test

sites,

. Maintaining construction vehicles,

. Reducing the speed of vehicles, with maximum speed of

30 km/hour,

. Frequently watering the road during dry season,

. Reducing H2S emissions by technical-economic-

environmental approach,

. Installing pipe along the fault line to avoid broken

pipe when soil movement occurs,

. Installing the signs for Occupational Health, Safety,

and Environment in accordance with the SOP. e. Locations for Environmental Management

. Well drilling and production testing sites,

PT Supreme Energy Muara Laboh 589 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Residential areas in the location of access road to

the project

f. Period of Environmental Management

. Environmental management will be performed during the

construction stage.

g. Institution of Environmental Management

1) Implementing Party : PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.1.1.2. Noise a. Environmental Impact to be Managed

. The impact occurs is Changes in noise level.

PT Supreme Energy Muara Laboh 590 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Sources of Impact

. Production well and injection well drilling,

production well testing.

Indicators of Environmental Management Success

. Noise levels meet the standards for residential area <

55 dB(A) and industrial area <70 dB(A) according to

Minister of Environment Decision No. 48 of 1996,

. For project workers, Threshold Limit Values (TLV) for

working environment according to Circular Letter of

Ministry of Manpower No. 01/MEN/ 97 (TLV working

environment < 85 dB(A)).

Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Providing educative information to the surrounding

communities.

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Setting up a buffer zone for noise,

. Installing rock muffler to reduce noise while

operating production tests,

PT Supreme Energy Muara Laboh 591 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Use of hearing protection equipment for workers In the

vicinity of production test locations.

. Implement SOP for reducing noise. e. Locations for Environmental Management

. Wells located nearest to residential areas. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy

Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 592 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.1.3 Erosion and Sedimentation a. Environmental Impact to be Managed

. Changes in erosion and sedimentation. b. Sources of Impact

. Land preparation. c. Indicators of Environmental Management Success

. Controlled erosion rates comply with Minister of

Forestry, Directorate General for Reforestation and

Rehabilitation Decision No. 041/Kpts/V/1998 (<15

ton/ha/of). d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Controlling the surface water runoff, for instance by

building trenches to direct rain water flow to the

catch ponds,

. Implementing technical and vegetative erosion control,

for instance by planting trees perpendicular to the

PT Supreme Energy Muara Laboh 593 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

water flow or parallel to the contour or in open areas

that are prone to erosion,

. Whenever possible conducting earth works during the

dry season. e. Locations for Environmental Management

. Areas prone to erosion in segments of access road,

wellpad sites, and geothermal power plant area. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party : PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 594 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.1.4. Surface Water Runoff Rates a. Environmental Impact to be Managed

. Changes in surface water runoff rates. b. Sources of Impact

. Land preparation. c. Indicators of Environmental Management Success

. Controlling erosion rates to comply with Minister of

Forestry, Directorate General for Reforestation and

Rehabilitation Decision No. 041/Kpts/V/1998 (<15

ton/ha/year),

. Controlling sediment loads that will be discharged

into river according to Government Regulation No. 82

Year 2001 (<50 mg/L),

. Controlling TSS levels to be equal to the Liki River

baseline, of 4 mg/L, and at < 50 mg/L maximum to

comply with Government Regulation No. 82 of 2001. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

PT Supreme Energy Muara Laboh 595 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Controlling surface water runoff, for instance by

building trenches to direct rain water flow to the

catch ponds,

. Technical and vegetative erosion control, for instance

by planting trees perpendicular to water flow or

parallel to the contour or in open areas that are

prone to erosion,

. Conducting earth works during the dry season whenever

possible. e. Locations for Environmental Management

Geothermal power plant project site area. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

PT Supreme Energy Muara Laboh 596 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.1.5 Surface Water Quality a. Environmental Impact to be Managed

. Changes in surface water quality. b. Sources of Impact

. Land preparation, production well and injection well

drilling, and production well testing. c. Indicators of Environmental Management Success

. TSS level in the river is under control = Liki River

TSS baseline i.e. 4 mg/L and < 50 mg/L maximum and

comply with Government Regulation No. 82 of 2001. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

PT Supreme Energy Muara Laboh 597 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Controlling surface water runoff due to rains, for

instance by building trenches to direct rain water

flow to the catch ponds,

. Technical and engineering and vegetative erosion

control, for instance by planting trees perpendicular

to water flow or parallel to the contour or in open

areas that are prone to erosion,

. Carrying out earthworks during the dry season. e. Locations for Environmental Management

. Geothermal power plant project area. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage.

Institutions for Environmental Management

1) Immplementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Party:

PT Supreme Energy Muara Laboh 598 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.2 Biological Components

6.1.2.2.1 Terrestrial Flora and Fauna a. Environmental Impact to be Managed

. Disturbance to terrestrial flora and fauna. b. Sources of Impact

. Land preparation. c. Indicators of Environmental Management Success

. Land clearing in accordance with requirements. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Minimizing open areas without vegetation,

. Gradual land clearance in accordance with activity

plan,

. Relocation of protected flora around the project site,

PT Supreme Energy Muara Laboh 599 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Revegetation on open land using types of local plants

suited to the local climatic and soil conditions,

. Planting the project area using types of plants that

could be used as animal feed.

. Prohibiting animal hunting and capturing as well as

taking protected flora.

. Building and developing nursery ground to develop loal

plant seeds

. Working together with the relevant institutions to

safeguard forest area/Kerinci Seblat National Park

(TNKS, Taman Nasional Kerinci Seblat) from illegal

logging activity

. Compensation for the value of the trees cut in the new

area. e. Locations for Environmental Management

. Environmental management to be implemented in

disturbed areas. f. Period of Environmental Management

Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

PT Supreme Energy Muara Laboh 600 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Forest Agency of Solok Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Forest Agency of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.2.2 Aquatic Biota a. Environmental Impact to be Managed

. Disturbance to aquatic biota. b. Sources of Impact

. Land preparation, production well and injection well

drilling, and production well testing. c. Indicators of Environmental Management Success

PT Supreme Energy Muara Laboh 601 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Changes in the composition of aquatic biota in the

river in the open area. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Efforts to minimize disturbance to aquatic biota

through erosion and sedimentation controls (refer to

section 6.1..2.1.3), management of surface water

runoff rates (refer to section 6.1.2.1.4), and

management of surface water quality (refer to section

6.1.2.1.5). e. Locations for Environmental Management

. Geothermal power plant project area. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 602 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of Renewable Energy and Energy

Conservation.

6.1.2.3 Socio-Economic and Culture Components

6.1.2.3.1 Employment Opportunities a. Environmental Impact to be Managed

. Increase in employment opportunities. b. Sources of Impact

. Labor recruitment activity c. Indicators of Environmental Management Success

. Number and proportion of local workers hired for

construction activities. d. Form of Environmental Management

PT Supreme Energy Muara Laboh 603 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Dissemination of job vacancies and skills requirements

for construction of Muara Laboh Geothermal Power Plant

to jorong in the surrounding areas,

. Selection and recruitment of labor is in accordance

with predetermined proportion by prioritizing workers

from Nagari Alam Pauh Duo, Pau Duo Nan Batigo, and

surrounding areas,

. Providing education and training programs for the

labor to be recruited in Muara Laboh Geothermal Power

Plant and conducting community development programs. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

PT Supreme Energy Muara Laboh 604 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo, and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.3.2. Business Opportunity a. Environmental Impact to be Managed

. Increase in business opportunities. b. Sources of Impact

. Labor recruitment.

PT Supreme Energy Muara Laboh 605 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Indicators of Environmental Management Success

. Number and proportion of local businesses absorbed in

the construction activities. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Facilitating and assisting communities in the

surrounding areas in setting up business through CSR

programs,

. Entrepreneurship education, training, and other

community development programs for the communities in

the surrounding areas,

. Training for workers in the industry that absorb high

number of workers (Presidential Regulation No. 28 of

2008 on National Industrial Policy), in particular

training in creative industry such as handicrafts,

performance arts, interactive games etc. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

PT Supreme Energy Muara Laboh 606 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental management will be performed during

construction stage. g. Institutions for Environmental Management

1) Implementing Agency: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

PT Supreme Energy Muara Laboh 607 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.3.3 Community Income a. Environmental Impact to be Managed

. Changes in community income. b. Sources of Impact

. Labor recruitment. c. Indicators of Environmental Management Success

. Sources of household income outside of agricultural

sector,

. Average level of household expenses. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Determination of wages or salaries in accordance with

Decent Living of Standard (KHL, Kebutuhan Hidup

Layak),

. Conducting community development program. e. Locations for Environmental Management

PT Supreme Energy Muara Laboh 608 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 609 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

6.1.2.3.4 Social Values and Social Norms a. Environmental Impact to be Managed

. Changes in social values and social norms as a result

of the recruitment of construction workers b. Sources of Impact

. Construction labor recruitment. c. Indicators of Environmental Management Success

. Increasing public trust in Company’s commitment to prioritize local hiring of jorong and nagari that are

directly related to the geothermal development

projects. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Dissemination of the labor recruitment in accordance

with the principles of honesty and transparent

justice,

. Initiating and implementing labor recruitment based on

the standards and regulations of the Company,

PT Supreme Energy Muara Laboh 610 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Implementing the commitment to recruit workers from

areas directly related to the development of

geothermal power plant project. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN

3) Report Receiving Agencies :

PT Supreme Energy Muara Laboh 611 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.3.5 Community Perception a. Environmental Impact to be Managed

. Changes in community perception. b. Sources of Impact

. Labor release / termination of employment in the

construction stage of Geothermal Power Plant. c. Indicators of Environmental Management Success

. Decrease in negative perception of recruitment

activity in the construction stage. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

PT Supreme Energy Muara Laboh 612 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Providing adequate skill training for workers during

their employment in Geothermal Power Plant project, so

that when they are laid-off they are ready and are

competitive in getting new jobs,

. Providing information regarding job opportunities to

the workers laid-off for the completion of

construction of geothermal power plant. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Government of Nagari and local KAN.

PT Supreme Energy Muara Laboh 613 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.2.4 Public Health Components a. Environmental Impact to be Managed

. Public health disorder / deterioration of public

health condition.

Sources of Impact

. Production well and injection well drilling,

production well testing, well maintenance, and

Geothermal Power Plant construction. c. Indicators of Environmental Management Success

. No increase in environmental diseases and no changes

to disease patterns. The community can utilize water

resources for daily needs and have easy access to

health services around the project location. d. Form of Environmental Management

PT Supreme Energy Muara Laboh 614 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Providing adequate sanitation facilities such as

toilets, and trash bins around the project area

through CSR activities,

. Increasing public awareness of environmental health by

providing educative information directly and

indirectly.

. Coordinating with the community health centre

(puskesmas) and Health Service Office particularly

conducting an observation of diseases around the

project. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict, Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

PT Supreme Energy Muara Laboh 615 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of

Solok Selatan District,

. Health Service Office of Solok Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of

Solok Selatan District,

. Health Service Office of Solok Selatan District,

. Directorate General of New and Renewable Energy,

and Energy Conservation (EBTKE).

6.1.3 Operation Stage

6.1.3.1 Physical-Chemical Components

6.1.3.1.1 Ambient Air Quality a. Environmental Impact to be Managed

. Changes in air quality. b. Sources of Impact

. Production well and injection well drilling,

production well testing, as well as emission and

PT Supreme Energy Muara Laboh 616 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

dispersion from cooling tower stack during operation

stage of Geothermal Power Plant project.

Indicators of Environmental Management Success

. Air quality from fugitive emissions and dispersed TSP

meets the standards (Government Regulation No. 41 of

1999 (ambient TSP standard < 230 µg/Nm3),

. H2S emission gas meet the standards pursuant to

Regulation of the Minister of the Environment No. 21

3 of 2008 on H2S Emission Standards (< 35 mg/Nm ),

. Odor levels meet the H2S standards (Decision of the

Minister of the Environment No. 50 of 1996 on H2S Odor

Level Standard (< 28 µg/Nm3), meanwhile the minimum

3 limit of human sense of H2S gas smell is 181 µg/Nm . d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Securing the well locations and setting a safe zone

limit for surrounding residents

. Providing safety equipment for workers in the vicinity

of wells,

. H2S monitoring equipment installed at production test

sites,

PT Supreme Energy Muara Laboh 617 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Frequently watering the road during dry seasons,

. Reducing H2S emissions by techno-economy-environment

approach,

. Installation of signs for Occupational Health, Safety,

and Environment in accordance with the SOP. e. Locations for Environmental Management

. Well drilling and production testing,

. Residential areas adjacent to the project site

entrance. f. Period of Environmental Management

. Environmental management will be performed during the

operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 618 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.1.2 Noise a. Environmental Impact to be Managed

. Changes in noise levels. b. Sources of Impact

. Production well and injection well drilling,

production well testing, and Geothermal Power Plant

operation. c. Indicators of Environmental Management Success

. Noise levels meet the applicable standards for

residential < 55 dB(A) and industrial <70 dB(A)

according to Minister of Environment Decision No.

48 of 1996,

. For projects worker, Threshold Limit Values (TLV)

for working environment according to Circular

Letter of Minister of Manpower No. 01/MEN/ 97 (TLV

working environment < 85 dB(A)). d. Form of Environmental Management

PT Supreme Energy Muara Laboh 619 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Setting up a buffer zone for noise,

. Use of hearing protection equipment for workers in the

vicinity of production test locations. e. Locations for Environmental Management

. Measurement of noise level in the residential area by

the entrace of the project.

. Measurement of noise level within work environment in

Geothermal Power Plant location and wellpads located

closest to the residential area. f. Period of Environmental Management

. Environmental management will be performed during the

operation stage.

Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

PT Supreme Energy Muara Laboh 620 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.1.3 Surface Water Quality a. Environmental Impact to be Managed

. Changes in surface water quality. b. Sources of Impact

. Production well and injection well drilling,

production well testing, as well as turbine and

condensate operation. c. Indicators of Environmental Management Success

TSS levels in the river are under control = Liki River baseline of 4 mg/L, maximum < 50 mg/L pursuant to

Government Regulation No. 82 of 2001 d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

PT Supreme Energy Muara Laboh 621 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Controlling surface water runoff from the rain, for

instance by building trenches to direct water flow to

the catch ponds,

. Technical and vegetative erosion control, for instance

by planting trees perpendicular to water flow or

parallel to the contour or in open areas that are

prone to erosion. e. Locations for Environmental Management

. Geothermal power plant project area. f. Period of Environmental Management

. Environmental management will be performed during the

operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 622 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.2 Biological Components

6.1.3.2.1 Aquatic Biota a. Environmental Impact to be Managed

. Disturbance to aquatic biota. b. Sources of Impact

. Production well and injection well drilling,

production well testing, and Geothermal Power Plant

operation and maintenance. c. Indicators of Environmental Management Success

. Reducing impact due to changes in the composition of

aquatic biota. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Efforts to minimize disturbance to aquatic biota

through management of surface water (refer to section

6.1.3.1.3).

PT Supreme Energy Muara Laboh 623 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW e. Locations for Environmental Management

. Geothermal power plant project area. f. Timing and Period of Environmental Management

. Environmental management will be performed during the

operation stage.

g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District.

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District

. Energy and Mineral Resources Service Office of Solok

Selatan District.

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE)

6.1.3.3 Socio-Economic and Culture Components

6.1.3.3.1 Employment Opportunities

PT Supreme Energy Muara Laboh 624 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

a. Environmental Impact to be Managed

. Opening up of employment opportunity,

. Increase in small to medium economic sector

activities,

. Increase in community income. b. Sources of Impact

. Labor recruitment. c. Indicators of Environmental Management Success

. Number and proportion of local workers hired for

operation stage activities. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Diissemination of job vacancies and skills

requirements for operational implementation of

Geothermal Power Plant to jorong around the activity

location.,

. Selection of candidate manpower and recruitment of

manpower in accordance with predetermined proportions

by prioritizing workers from jorong arund the activity

location.

PT Supreme Energy Muara Laboh 625 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Provide labor education and training programs for

workers of Laboh Geothermal Power Plant and conduct

community development programs, e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Timing and Period of Environmental Management

. During construction stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 626 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.3.2 Business Opportunity a. Environmental Impact to be Managed

. Increasing business opportunities. b. Sources of Impact

. Labor recruitment. c. Indicators of Environmental Management Success

. Number and proporton of local businesses created

during the operation stage.

Environmental management programs to be implemented to

prevent or mitigate potential impacts through socio-

economic approach, including:

. Facilitating and helping the communities Nagari Alam

Pauh Duo, Pauh Duo Nan Batigo, and in the surrounding

area for setting up new businesses through CSR

programs,

PT Supreme Energy Muara Laboh 627 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Conducting entrepreneurship education and training

programs and community development programs for

residents from jorong around the activity location.

. Conducting manpower training in the field of labor-

intensive industry (Presidential Decision No. 28 of

2008 on National Industrial Policy), in particular

training in the fields of creative industries such as

crafts (handicrafts), performance art, interactive

games, and others,

. Utilization of CSR fund shall be further arranged

through agreements among the Company, communities, and

Government. d. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. e. Period of Environmental Management

. Environmental management will be performed during the

operation stage. f. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

PT Supreme Energy Muara Laboh 628 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, local KAN.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.3.3 Community Income a. Environmental Impact to be Managed

. Changes in community income (economic growth of small

and medium businesses). b. Sources of Impact

. Labor recruitment.

PT Supreme Energy Muara Laboh 629 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Indicators of Environmental Management Success

. Increase of community income due to labor recruitment

in operation stage. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Determination of wages and salaries in accordance

with Decent Standard of Living (KHL, Kebutuhan Hidup

Layak),

. Conducting community economic development programs e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

operation stage.

Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

1) Supervising Agencies:

PT Supreme Energy Muara Laboh 630 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District.,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN

2) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.3.4 Social Values and Norms a. Environmental Impact to be Managed

. Changes in social values and norms due to operation

labor recruitment. b. Sources of Impact

. Operational worker recruitment.

PT Supreme Energy Muara Laboh 631 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Indicators of Environmental Management Success

. Increasing public trust in the Company's commitment to

prioritize local hiring from jorong and nagari that

are directly related to geothermal development

projects. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Disseminating information concerning labor recruitment

in accordance with the principles of honesty and

transparent justice,

. Initiating and implementing labor recruitment based

on the standards and regulations of the Company,

. Implementing the commitment of prioritizing local

hiring from area that directly related to the

development of geothermal power plant project. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict, Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

PT Supreme Energy Muara Laboh 632 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental management will be performed during the

operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, local KAN

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.3.3.5 Community Perception

PT Supreme Energy Muara Laboh 633 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW a. Environmental Impact to be Managed

. Changes in community perception. b. Sources of Impact

. Labor recruitment. c. Indicators of Environmental Management Success

. Decrease of negative perceptions toward labor

recruitment in the construction stage. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Providing skills training for laid-off workers to be

competitive in getting new and better jobs,

. Providing information regarding job opportunities to

the workers laid-off on the completion of Geothermal

Power Plant activities. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict Solok Selatan

District. f. Period of Environmental Management

PT Supreme Energy Muara Laboh 634 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental management will be performed during the

operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, local KAN

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

PT Supreme Energy Muara Laboh 635 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

6.1.3.4 Public Health Components a. Environmental Impact to be Managed

. Public health disorder/deterioration of public health

conditions. b. Sources of Impact

. Drilling of production well and injection well,

production well testing, and operation and maintenance

of well and geothermal power plant. c. Indicators of Environmental Management Success

. Parameter to be monitored is environmental disease

that can cause infection and is related to the

degradation of quality of the environment,

. Sanitation facilities such as clean water supplies,

toilets, healthy house and solid waste management.

d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Providing adequate sanitation facilities such as

toilets, toilets, and trash bins around the project

area,

PT Supreme Energy Muara Laboh 636 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Increasing public awareness of environmental health by

providing educative information directly and

indirectly. e. Locations for Environmental Management

. In the vicinity of the site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of

Solok Selatan District,

. Health Service Office of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies :

PT Supreme Energy Muara Laboh 637 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of

Solok Selatan District,

. Health Service Office of Solok Selatan District,

. Directorate General of New and Renewable Energy,

and Energy Conservation (EBTKE).

6.1.4 Post Operation Stage

6.1.4.1 Physical-Chemical Components

6.1.4.1.1 Erosion and Sedimentation a. Environmental Impact to be Managed

. Changes in erosion and sedimentation. b. Sources of Impact

. Rehabilitation/revegetation. c. Indicators of Environmental Management Success

. Erosion rates are under control and comply with

Decision of the Director General for Reforestation and

Rehabilitation of the Ministry of the Environment No.

041/Kpts/V/1998 (< 15 ton/ha/of). d. Form of Environmental Management

PT Supreme Energy Muara Laboh 638 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Technical and vegetative erosion control. For example,

by planting trees perpendicular to flow or parallel to

contours or on open areas that are prone to erosion,

. Continuing erosion and sedimentation management that

have been implemented in the construction and

operation phases. e. Locations for Environmental Management

. Areas prone to erosion along the access road, wellpad

area, and geothermal power plant area no longer used. f. Period of Environmental Management

. Environmental management will be performed during the

post operation stage.

g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

PT Supreme Energy Muara Laboh 639 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.1.2 Surface Water Runoff Rates a. Environmental Impact to be Managed

. Changes in surface water runoff rates b. Sources of Impact

. Rehabilitation/revegetation. c. Indicators of Environmental Management Success

. Sediment load entering river is under control and in

accordance with Government Regulation No. 82 of 2001

(<50 mg/L). d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

PT Supreme Energy Muara Laboh 640 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Technical and vegetative erosion control. For example,

by planting trees perpendicular to flow or parallel to

contours or on open areas that are prone to erosion,

. Continuing erosion and sedimentation management that

have been implemented since the construction and

operation phases. e. Locations for Environmental Management

. Areas prone to erosion along the access road, site

area, and around geothermal wells no longer used. f. Period of Environmental Management

. Environmental Management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 641 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.1.3 Surface Water Quality a. Environmental Impact to be Managed

. Changes in surface water quality. b. Sources of Impact

. Rehabilitation/revegetation. c. Indicators of Environmental Management Success

. TSS content in the river is under control = baseline

of TSS in the river is 4 mg/l and < 50 mg/l maximum,

according to the Government Regulation No. 82 of 2001. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Technical and vegetative erosion control. For

example, by planting trees perpendicular to flow or

parallel to contours or on open areas that are prone

to erosion,

PT Supreme Energy Muara Laboh 642 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Continuing erosion and sedimentation management that

have been implemented since the construction and

operation phases. e. Locations for Environmental Management

. Areas prone to erosion along the access road, site

area, and around geothermal wells no longer used. f. Period of Environmental Management

. Environmental Management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 643 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.2 Biological Components

6.1.4.2.1 Terrestrial Flora and Fauna a. Environmental Impact to be Managed

. Increasing flora and fauna. b. Sources of Impact

. Land Rehabilitation/revegetation. c. Indicators of Environmental Management Success

. Total land of revegetated area,

. Type of flora planted,

. Success rate of revegetation plant growth,

. The existence of protected plants in accordance with

Government Regulation No. 07 of 1999. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Conducting revegetation using types of plants suited

to the climatic and soil conditions in open land such

as guava, Ficus sp., and grasses,

PT Supreme Energy Muara Laboh 644 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Planting the project area using types of plants that

could be used as animal feed,

. Prohibiting animal hunting and capturing and taking

protected flora. e. Locations for Environmental Management

. Monitoring will be conducted in areas where

rehabilitation/revegetation is implemented. f. Timing and Period of Environmental Management

. Environmental management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 645 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.2.2 Aquatic Biota a. Environmental Impact to be Managed

. Disturbance to aquatic biota. b. Sources of Impact

. Land Rehabilitation/revegetation. c. Indicators of Environmental Management Success

. Changes in the composition of aquatic biota. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

. Controlling soil erosion and sedimentation, management

of surface water runoff, and management of surface

water quality. g. Locations for Environmental Management

. Areas prone to erosion along the former location of

access road, wellpad area, and around geothermal

wells no longer used. f. Period of Environmental Management

PT Supreme Energy Muara Laboh 646 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.3 Socio-Economic and Culture Components

6.1.4.3.1 Employment Opportunity a. Environmental Impact to be Managed

. Loss of employment opportunity. b. Sources of Impact

. Termination of employment of operation workforce

PT Supreme Energy Muara Laboh 647 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Indicators of Environmental Management Success

. The number and proportion of unemployment resulting

from the loss of jobs in the project. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Disseminating the project closure plan to the workers,

. Disseminating the plan for workforce termination of

employment to the workers,

. Providing fair compensation to employees in accordance

with applicable regulations,

. Disseminating information concerning the end of the

project activities to the workers. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

post operation stage.

Institutions for Environmental Management

PT Supreme Energy Muara Laboh 648 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Government of Nagari, KAN Alam Pauh Duo and Pauh Duo

Nan Batigo.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of Renewable Energy and Energy

Conservation.(EBTKE).

6.1.4.3.2 Business Opportunity a. Environmental Impact to be Managed

. Loss of business opportunities.

PT Supreme Energy Muara Laboh 649 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW b. Sources of Impact

. Termination of employment of operation workers c. Indicators of Environmental Management Success

. Reduced number and proportion of businesses in the

post operation stage,

. The value of compensation provided as a result of

workforce termination of employment being in

accordance with applicable regulations. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Disseminating the project closure plan to the workers,

. Disseminating the plan for termination of employment

to the workers,

. Providing fair compensation to employees in accordance

with applicable regluations,

. Disseminating information concerning the end of

project activities to the workers. e. Locations for Environmental Management

PT Supreme Energy Muara Laboh 650 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 651 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.3.3 Community Income

a. Environmental Impact to be Managed

. Changes in community income (decrease of community

income due to termination of employment

b. Sources of Impact

. Termination of employment of operation workforce

(compensation provided laying off the workforce

during project activity is in accordance with

applicable regulations).

c. Indicators of Environmental Management Success

. Reduced income of the local community due to

termination of employment in the post operation stage. d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Disseminating the project closure plan to the workers,

PT Supreme Energy Muara Laboh 652 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Disseminating the plan for labor termination of

employment ,

. Providing fair compensation to the employees in

accordance with applicable regulations,

. Disseminating information concerning the end of

project activities to the workers. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Timing and Period of Environmental Management

. Environmental Management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

PT Supreme Energy Muara Laboh 653 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.1.4.3.4 Community Perception a. Environmental Impact to be Managed

. Changes in community perception. b. Sources of Impact

. Termination of employment of operational workers c. Indicators of Environmental Management Success

. Reduced negative perceptions toward labor termination

of employment d. Form of Environmental Management

PT Supreme Energy Muara Laboh 654 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

socio-economic approach, including:

. Disseminating the project closure plan to the workers,

. Disseminating the plan for labor termination of

employment ,

. Providing fair compensation to the employees in

accordance with applicable regulations,

. Disseminating information concerning the end of

project activities to the workers. e. Locations for Environmental Management

. In the vicinity of site, including Pauh Duo

Subdistrict and Sangir Subdistrict, Solok Selatan

District. f. Period of Environmental Management

. Environmental Management will be performed during the

post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 655 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District.

. Directorate General of New and Renewable Energy and

Energy Conservation

6.1.5 Management Of Other Impacts a. Environmental Impact to be Managed

. Solid waste and water waste from Geothermal Power

Plant activities. b. Sources of Impact

. Drilling wells, sump pits, and production wells

(during production test). c. Indicators of Environmental Management Success.

PT Supreme Energy Muara Laboh 656 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Wastewater quality meets the applicable standards,

. Comply with applicable regulations on hazardous and

toxic waste management (Government Regulation No. 101

of 2014) . d. Form of Environmental Management

Environmental management programs to be implemented to

prevent or mitigate potential impacts will be based on a

technological approach, including:

Domestic Solid Waste

. Dispose solid waste in landfill.

Liquid Waste:

. Treat domestic liquid waste from all activities at the

project area in waste water treatment plants,

. Condensate and brine, produced during the production

test and operation of geothermal power plant, to be

injected through reinjection wells,

. Building sump pits covered with waterproof coating.

Water collected in the sump pits will be used in the

drilling process as drilling mud component and then

will be reinjected to the well.

Hazardous and Toxic Wastes:

. Ensuring equipment and materials used by SEML do not

contain PCBs, asbestos, ODS (ozone depleting

PT Supreme Energy Muara Laboh 657 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

substances), and other materials that are prohibited

for use as provided by regulations,

. Neutralizing battery acid and store used lead acid

batteries safely,

. Collecting used oil in drums and hand it over to a

registered hazardous and toxic waste management

company for further treatment,

. Installing secondary containment around flammable and

dangerous materials as needed,

. Periodically conducting training for workers in

handling hazardous and toxic wastes.

e. Locations for Environmental Management

. Hazardous and toxic waste temporary storage,

. Waste water treatment plants,

. Non-hazardous and non-toxic waste landfill,

. Wellpads. f. Period of Environmental Management

. Environmental management will be performed from the

construction stage until the post operation stage. g. Institutions for Environmental Management

1) Implementing Party: PT Supreme Energy Muara Laboh

PT Supreme Energy Muara Laboh 658 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

PT Supreme Energy Muara Laboh 659

Table VI-1 Environmental Management Plan Matrix for Geothermal Development Activities for 250 MW Muara Laboh Power Plant by PT Supreme Energy

Muara Laboh

A Pre-Construction Stage

1. Change in land Land Changes in land Environmental In the vicinity of site, During the SEML . Environmental . Environmental ownership and land acquisition ownership and management including Nagari Alam Pauh pre- Service Office Service Office tenure activity. Most land tenure do programs need Duo and Pauh Duo Nan construction of Solok of Solok of the land had not cause to be Batigo, Pauh Duo stage. Selatan Selatan been acquired conflict in implemented to Subdistrict, Solok Selatan District District. during the communities. prevent or District. . Government of . Energy and exploration mitigate Pauh Duo Mineral stage. potential Subdistrict. Resources impacts through . Energy and Service Office socio-economic Mineral of Solok approach, Resources Selatan including: Service Office District.

. Conducting of Solok . Land Agency of dissemination Selatan South of land District. Directorate acquisition . Land Agency of General of New plans with Solok Selatan and Renewable reference to District. Energy and Energy Presidential . Governments of Conservation Regulation No. Nagari, KAN (EBTKE) 36 of 2005. Alam Pauh Duo, . Conducting land and Pauh Duo acquisition Nan Batigo wisely and fairly in accordance with

PT Supreme Energy Muara Laboh 660 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Considering the aspirations of customary community regarding land acquisition with land owners, district government, Nagari and KAN as well as Ninik Mamak.

2. Community perception Land Reduced Environmental In the vicinity of site, During the SEML . Environmental . Environmental acquisition negative management including Nagari Alam Pauh pre- Service Office Service Office activity. Most perceptions programs need Duo and Pauh Duo Nan construction of Solok of Solok of the land had towards land to be Batigo, Pauh Duo stage. Selatan Selatan been acquired acquisition. implemented to Subdistrict, Solok Selatan District District. during the prevent or District. . Government of . Energy and exploration mitigate Pauh Duo Mineral stage. potential Subdistrict. Resources impacts through . Energy and Service Office socio-economic Mineral of Solok approach,

PT Supreme Energy Muara Laboh 661 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Following up the aspirations of customary community related to land acquisition

B. Construction Stage

PT Supreme Energy Muara Laboh 662 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

1. Changes in air quality Production well . Air quality Environmental . Well drilling and During the SEML . Environmental . Environmental and injection from fugitive management production testing construction Service Service well drilling, emissions and programs need to sites, stage Office of Office of production well dispersed TSP be implemented to . Residential areas in Solok Selatan Solok Selatan testing, and meet the prevent or the location of project District. District. construction of standards mitigate potential access. Energy and . Energy and (Government geothermal impacts through Mineral Mineral power plant. Regulation technology Resources Resources No. 41 of approach, Service Service 1999 - TSP including : Office of Office of ambient Solok Selatan Solok Selatan . Securing the standard < District. District. well location 230 µg/Nm3), and setting a . Directorate . H2S emission safe zone limit General of gas meets the for surrounding New and applicable residents Renewable standard according to Energy and (Minister of SOP of SEML, Energy Environment Conservation Regulation . Providing (EBTKE) No. 21 of safety equipment for 2008 - H2S emission < 35 workers in the mg/Nm3), vicinity of the . Odor level wells,

meets the H2S . Installing H2S standard monitoring (Ministry of equipment at Environment production test Decision No. sites, 50 of 1996 - . Maintaining H2S odor construction level < 28

PT Supreme Energy Muara Laboh 663 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Slowing the speed of vehicles, with maximum speed of 30 km/hour,

. Frequently watering the road during dry season,

. Reducing H2S emissions by technical- economic- environmental approach,

. Installing pipe along the fault line to avoid broken pipe when soil movement occurs,

. Installing the signs for Occupational Health, Safety, and Environment in accordance with the SOP.

PT Supreme Energy Muara Laboh 664 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2. Changes in noise level Production well . Noise levels Environmental Environmental management in During the SEML . Environmental . Environmental and injection meet the management the location of the wells construction Service Service well drilling, applicable programs to be nearest to the residential stage Office of Office of production well standards for implemented to area Solok Selatan Solok Selatan testing. residential < prevent or District. District. 55 dB(A) and mitigate potential . Energy and . Energy and industrial impacts will be Mineral Mineral <70 dB(A) based on a socio- Resources Resources according to economic approach, Service Service Ministry of including: Office of Office of the . Providing Solok Selatan Solok Selatan Environment educative District. District. Decision No. information for . Directorate 48 of 1996. the communities General of . For project in the New and workers, surrounding Renewable Threshold area. Energy and Limit Values Environmental Energy (TLV) for management Conservation working programs that need (EBTKE) environment to be implemented according to to prevent or Circular mitigate potential Letter of impacts will be Ministry of based on a Labor No. technological 01/MEN/ 97 approach, (TLV working including: environment < . Setting up a 85 dB(A)). buffer zone for noise,

. Using of hearing

PT Supreme Energy Muara Laboh 665 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Implementing SOP related to noise control

3. Change in Erosion and Land Erosion rates Environmental Areas prone to erosion in Once during SEML . Environmental . Environmental sedimentation preparation comply with management segments of access road, the Service Service Decision of programs to be wellpads, and geothermal construction Office of Office of Directorate implemented to power plant area. stage Solok Selatan Solok Selatan General for prevent or District. District.

Reforestation mitigate potential . Energy and . Energy and and impacts will be Mineral Mineral Rehabilitation based on a Resources Resources of the Ministry technological Service Service of Forestry No. approach, Office of Office of 041/Kpts/V/1998 including: Solok Selatan Solok Selatan (<15 . Controlling the District. District. ton/ha/of). surface water . Directorate runoff, for General of instance by New and building Renewable trenches to Energy and direct rain Energy water flow to Conservation the catch (EBTKE) ponds,

. Implementing technical and

PT Supreme Energy Muara Laboh 666 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Conducting earthworks during the dry season as much as possible.

4. Changes in surface Land . Erosion rate Environmental Geothermal power plant During the SEML . Environmental . Environmental water runoff rates preparation comply with management project site area construction Service Service Decision of programs to be stage Office of Office of Directorate implemented to Solok Selatan Solok Selatan General for prevent or District. District.

Reforestation mitigate potential . Energy and . Energy and and impacts will be Mineral Mineral Rehabilitatio based on a Resources Resources n of the technological Service Service Ministry of approach, Office of Office of Forestry No. including: Solok Selatan Solok Selatan 041/Kpts/V/19 . Controlling District. District. 98 (<15 surface water . Directorate ton/ha/year). runoff, for General of

PT Supreme Energy Muara Laboh 667 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Sediment instance by New and charge that building Renewable will flow trenches to Energy and into river is direct rain Energy under control water flow to Conservation according to the catch (EBTKE) Government ponds,

Regulation . Technical and No. 82 Year vegetative 2001 (<50 erosion mg/L) control, for . TSS level is instance by under control planting trees = Liki River perpendicular baseline, to water flow i.e. 4 mg/L, or parallel to and < 50 mg/L the contour or maximum.and in open areas comply with that are prone Government to erosion, Regulation . Conducting No. 82 of earth works 2001 during the dry season.

5. Changes in surface Land TSS level in Environmental Geothermal power plant During the SEML . Environmental . Environmental water quality preparation, the river. is management project site area construction Service Service production well under control = programs to be stage Office of Office of and injection TSS baseline implemented to Solok Selatan Solok Selatan well drilling, for Liki River prevent or District. District. and production which is 4 mitigate potential . Energy and . Energy and well testing. mg/L and impacts through a Mineral Mineral

PT Supreme Energy Muara Laboh 668 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Year 2001 . Controlling Solok Selatan Solok Selatan surface water District. District. runoff from . Directorate rain, for General of instance by New and building Renewable trenches to Energy and direct rain Energy water flow to Conservation the catch (EBTKE) ponds,

. Technical and vegetative erosion control, for instance by planting trees perpendicular to water flow or parallel to the contour or in open areas that are prone to erosion,

. Conducting earth works during the dry season as much as possible.

PT Supreme Energy Muara Laboh 669 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

6. Disturbance to Land Land clearing Environmental In disturbed areas During the SEML . Environmental . Environmental terrestrial flora and preparation according to management construction Service Service fauna requirements programs to be stage Office of Office of implemented to Solok Selatan Solok Selatan prevent or District. District.

mitigate potential . Forestry . Forestry impacts through a Service Service technological Office Office approach, . Energy and . Energy and including : Mineral Mineral . Minimizing open Resources ResourcesServ areas without Service ice Office vegetation, Office of, of, Solok . Gradual land SolokSelatan Selatan clearance in District District accordance with . Directorate activity plan, General of . Relocation of New and protected flora Renewable around the Energy and project site, Energy Conservation . Revegetation on (EBTKE) open land using types of plants suited to climatic and soil conditions in an open land by using local plants.

. Reforestation of activity

PT Supreme Energy Muara Laboh 670 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Prohibiting animal hunting and capturing as well as taking of protected flora.

. Working together with the relevant institutions to safeguard forest area/TNKS from illegal logging activity.

. Replacing trees that will be cut in the new area.

7. Disturbance to aquatic Land Changes in the Environmental Geothermal power plant During the SEML . Environmental . Environmental biota preparation, composition of management project site area construction Service Service production well aquatic biota programs to be stage Office of Office of and injection in open land implemented to Solok Selatan Solok Selatan well drilling, prevent or District. District. and production mitigate potential . Energy and . Energy and well testing. impacts through a Mineral Mineral

PT Supreme Energy Muara Laboh 671 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. management of surface water (as referred to in section

8. Increase of employment Labor Number and Environmental In the vicinity of site, During the SEML . Environmental . Environmental opportunities recruitment proportion of management including Pauh Duo construction Service Service local workers programs to be Subdistrict, Sangir stage Office of Office of hired for implemented to Subdistrict, Solok Selatan Solok Solok construction prevent or District. Selatan Selatan activities mitigate potential District. District. impacts through a . Social, . Social, socio-economic Manpower, and Manpower, and approach, Transmigratio Transmigratio including: n Service n Service . Dissemination of Office of Office of job openings and Solok Selatan Solok Selatan skills District. District

requirements for . Energy and . Energy and

PT Supreme Energy Muara Laboh 672 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Education and training programs for workers to be employed in Muara Laboh Geothermal Power Plant and community development activities

9. Opening up of business Labor Number and Environmental In the vicinity of site, During the SEML . Environmental . Environmental

PT Supreme Energy Muara Laboh 673 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

construction mitigate potential . Social, . Social, stage impacts will be Manpower, and Manpower, and based on a socio- Transmigratio Transmigratio economic approach, n Service n Service including: Office of Office of . Facilitating and Solok Selatan Solok Selatan assisting District District.

communities in . Energy and . Energy and the surrounding Mineral Mineral areas in setting Resources Resources up business Service Service through CSR Office of Office of programs, Solok Selatan Solok Selatan . Entrepreneurship District. District. education, . Governments . Directorate training, and of Nagari, General of other community local KAN New and development Renewable activities for Energy and residents in the Energy surrounding Conservation areas, (EBTKE) . Training for workers in the industry that hire high number of workers (Presidential

PT Supreme Energy Muara Laboh 674 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

10. Change in Community Labor  Sources of Environmental In the vicinity of site, During the SEML . Environmental . Environmental income recruitment household management including, Pauh Duo construction Service Service income other programs to be Subdistrict, Sangir stage Office of Office of than from implemented to Subdistrict, Solok Selatan Solok Solok agricultural prevent or District. Selatan Selatan sector. mitigate potential District. District. impacts will be  Average level . Social, . Social, based on a socio- of household Manpower, and Manpower, and economic approach, expenses Transmigratio Transmigratio including: n Service n Service . Determination of Office of Office of levels of wages Solok Selatan Solok Selatan or salaries in District. District.

accordance with . Energy and . Energy and Decent Standard Mineral Mineral of Living (KHL, Resources Resources Kebutuhan Hidup Service Service Layak), Office of Office of . Conducting Solok Selatan Solok Selatan

PT Supreme Energy Muara Laboh 675 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

11. Changes in social Labor Increasing Environmental In the vicinity of site, During the SEML . Environmental . Environmental values and social recruitment for public trust in management including Pauh Duo construction Service Service

norms construction Company’s programs to be Subdistrict, Kecamatan stage Office of Office of commitment to implemented to Sangir, Solok Selatan Solok Selatan Solok prioritize lical prevent or District. District. Selatan hiring of jorong mitigate potential . Social, District. and nagari that impacts will be Manpower, and . Social, are directly based on a socio- Transmigratio Labor, and related to the economic approach, n Service Transmigratio geothermal including: Office of n Service development . Disseminating Solok Selatan Offic eof projects. the labor District Solok Selatan recruitment in . Energy and District. accordance with Mineral . Energy and the principles Resources Mineral of honesty and Service Resources transparent Office of Service justice, Solok Selatan Office of . Initiating and District. Solok Selatan implementing . Government of District. labor Nagari and . Directorate recruitment local KAN General of based on the New and

PT Supreme Energy Muara Laboh 676 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Implementing Conservation the commitment (EBTKE) of prioritizing local hiring from areas directly related to the development of geothermal power plant project.

12. Changes in community Labor release Decrease of In the vicinity of site, During the SEML . Environmental . Environmental Environmental perception in construction negative including Pauh Duo construction Service Service management stage of perception Subdistrict, Sangir stage Office of Office of programs to be Geothermal towards Subdistrict, Solok Selatan Solok Selatan Solok Selatan implemented to Power Plant. recruitment District. District. District. prevent or activity in . Social, . Social, mitigate potential construction Manpower, and Manpower, and impacts will be stage Transmigratio Transmigratio based on a socio- n Service n Service economic approach, Office of Office of including: Solok Selatan Solok Selatan . Providing District. District. adeaqute skill . Energy and . Energy and training for Mineral Mineral workers so that Resources Resources when they are Service Service laid off they Office of Office of are ready and Solok Selatan Solok Selatan

PT Supreme Energy Muara Laboh 677 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Form of Period of Institution of Environmental Management Environmental Impact Source of Indicator of Location of Environmental No Environmental Environmental Implementing Supervising Report Receiving to be Managed Impact Success Management Management Management Party Agency Agency competitive in District. District. getting new . Government of . Directorate jobs, Nagari, local General of . Providing KAN New and information Renewable regarding job Energy and opportunities Energy to workers laid Conservation off at the end of construction of geothermal power plant 13. Public health Production well No increase in Environmental In the vicinity of site, During the SEML . Environmental . Environmental disorder/deterioration and injection environmental management including Pauh Duo construction Service Service of public health well drilling, diseases and no programs to be Subdistrict and Solok stage Office of Office of condition. production well changes in implemented to Selatan District. Solok Selatan Solok Selatan testing, and disease prevent or District. District. Geothermal patterns. People mitigate potential . Social, . Social, Power Plant around the site impacts will be Manpower, and Manpower, and construction. location can based on Transmigratio Transmigratio utilize water technological n Service n Service resources for approach, Office of Office of daily needs and including: Solok Selatan Solok Selatan have easy access . Providing District. District to health adequate . Energy and . Energy and services around sanitation Mineral Mineral the project facilities such Resources Resources location. as latrines, Service Service toilets, and Office of Office of trash bins Solok Selatan Solok Selatan around the District. District.. project area, . Government of . Directorate Nagari and General of

PT Supreme Energy Muara Laboh 678 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Increasing local KAN New and public Renewable awareness of Energy and environmental Energy health by Conservation providing (EBTKE) educative information directly and indirectly

C Operation Stage

1. Changes in air quality Production well . Air quality Environmental . Well drilling and During the SEML . Environmental . Environmental and injection from fugitive management production testing operation Service Service well drilling, emissions and programs to be locations, stage Office of Office of production well dispersed TSP implemented to . Residential areas Solok Selatan Solok Selatan testing, as meet TSP prevent or adjacent to the access District. District. well as ambient mitigate potential road to the project. . Energy and . Energy and emission and standards impacts will be Mineral Mineral dispersion from according to based on a Resources Resources cooling tower Government technological Service Service stack during Regulation approach, Office of Office of operation stage No. 41 of including: Solok Selatan Solok Selatan of geothermal 1999 (TSP . Securing the District. District. power plant. ambient air well locations . Directorate standard < and setting a General of 230 µg/Nm3), safe zone limit New and for the . Emission and Renewable surrounding gas Energy and community . dispersion Energy from cooling . Providing Conservation tower stack safety (EBTKE) when equipment for

PT Supreme Energy Muara Laboh 679 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. H2S gas equipment emission installed at meets the production test standards sites,

pursuant to . Frequently Minister of watering the Environment road during dry Regulation seasons, No. 21 of . Reducing H2S 2008 - H S 2 emissions by emission techno-economy- standard < 35 environment mg/Nm3), approach, . Odor levels . Installation of meet the H S 2 signs for standards Occupational according to Health, Safety, Ministry of and Environment Environment in accordance Decision No. with the SOP. 50 of 1996 -

H2S odor level < 28 µg/Nm3). Minimum limit of human

sense of H2S gas smell is

PT Supreme Energy Muara Laboh 680 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2. Changes in noise level Production well . Noise levels Environmental Working environment and During the SEML . Environmental . Environmental and injection meet the management wells adjacent to the operation Service Service well drilling, applicable programs to be residential area stage Office of Office of production well standards for implemented to Solok Selatan Solok Selatan testing, and residential < prevent or District. District. Geothermal 55 dB(A) and mitigate potential . Energy and . Energy and Power Plant industrial impacts will be Mineral Mineral operation. <70 dB(A) based on Resources Resources according to technological Service Service Ministry of approach, Office of Office of Environment including: Solok Selatan Solok Selatan Decision No. . Setting up a District. District. 48 of 1996, buffer zone for . Directorate . For projects noise, General of workers, . Installing Rock New and Threshold Muffler to Renewable Limit Values reduce noise Energy and (TLV) for during Energy working production Conservation environment test. (EBTKE) must be . Use of hearing complied with protection according to equipment for Circular workers In the Letter of vicinity of Minister of production test Manpower No. locations. 01/MEN/ 97 (TLV working environment < 85 dB(A)).

PT Supreme Energy Muara Laboh 681 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3. Changes in surface Production well TSS level in Environmental Geothermal power plant During the SEML . Environmental . Environmental water quality and injection the river is management project site area operation Service Service well drilling, under control = programs to be stage Office of Office of production well Liki River implemented to Solok Selatan Solok Selatan testing, as baseline of 4 prevent or District. District. well as turbine mg/L, maximum < mitigate potential . Energy and . Energy and and condensate 50 mg/L impacts will be Mineral Mineral operation. pursuant to based on a Resources Resources Government technological Service Service Regulation No. approach, Office of Office of 82 of 2001 including: Solok Selatan Solok Selatan . Controlling District. District.

surface water . Directorate runoff from General of rain, for New Energy, instance by Renewable and building Energy trenches to Conservation direct rain water flow to the catch ponds,

. Technical and vegetative erosion control, for instance by planting trees perpendicular to water flow or parallel to the contour or

PT Supreme Energy Muara Laboh 682 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Whenever possible conducing earthworks during dry season.

4. Disturbance to aquatic Production well Reduced impact Environmental Geothermal power plant During the SEML . Environmental . Environmental biota and injection due to the management project site area operation Service Service well drilling, changes in programs to be stage Office of Office of production well composition of implemented to Solok Selatan Solok Selatan testing, and aquatic biota. prevent or District. District. well operation mitigate potential . Energy and . Energy and and maintenance impacts will be Mineral Mineral and Geothermal based on a Resources Resources Power Plant technological Service Service approach, Office of Office of including: Solok Selatan Solok Selatan District. District. . Efforts to

minimize . Directorate disturbance to General of aquatic biota New Energy, through Renewable and management of Energy surface water Conservation quality

5. Opening up of Labor Number and Environmental In the vicinity of site, During the SEML . Environmental . Environmental employment recuitment proportion of management including Pauh Duo operation Service Service opportunities local workers programs to be Subdistrict, Sangir stage Office of Office of

PT Supreme Energy Muara Laboh 683 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

during mitigate potential . Social, . Social, operation stage impacts will be Manpower, and Manpower, and based on a socio- Transmigratio Transmigratio economic approach, n Service n Service including: Office of Office of . Disseminating Solok Selatan Energy and job vacancies District. Mineral

and skills . Energy and Resources requirements Mineral Service for operational Resources Office of implementation Service Solok Selatan of Geothermal Office of District. Power Plant to Solok Selatan Solok Selatan all jorong in District District. the surrounding . Governments . Directorate areas, of Nagari, General of . Selection and local KAN New and recruitment of Renewable manpower in Energy and accordance with Energy predetermined Conservation proportions by (EBTKE) prioritizing workers from Nagari Alam Pauh Duo, Pau Duo Nan Batigo, and surrounding areas,

. Providing

PT Supreme Energy Muara Laboh 684 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

6. Opening up of business Labor Number of local Environmental In the vicinity of site, During the SEML . Environmental . Environmental opportunities recuitment businesses management Pauh Duo Subdistrict, and operation Service Service absorbed during programs to be Sangir Subdistrict Solok stage Office of Office of the operation implemented to Selatan District. Solok Selatan Solok Selatan stage. prevent or District. District. mitigate potential . Social, . Social, impacts through Manpower, and Manpower, and socio-economic Transmigratio Transmigratio approach, n Service n Service including: Office of Office of . Facilitating Solok Selatan Solok Selatan and helping the District. District.

communities in . Energy and . Energy and the surrounding Mineral Mineral area for Resources Resources setting up new Service Service businesses Office of Office of through CSR Solok Selatan Solok Selatan programs, District. District.

. Conducting . Governments . Directorate

PT Supreme Energy Muara Laboh 685 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Conducting manpower training in the labor-intensive industry (Presidential Decision No. 28 of 2008 on National Industrial Policy), in particular training in the fields of creative industries such as crafts (handicrafts), performance art, interactive games, and

PT Supreme Energy Muara Laboh 686 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Utilization of CSR fund shall be further arranged through agreements among the Company, communities, and Government.

7. Changes in community Labor Increase in Environmental In the vicinity of site, During the SEML . Environmental . Environmental income. recuitment local community management including Pauh Duo operation Service Service income due to programs to be Subdistrict and Sangir stage Office of Office of labor implemented to Subdistrict, Solok Selatan Solok Selatan Solok Selatan recruitment in prevent or District. District. District. operation stage mitigate potential . Social, . Social, impacts will be Manpower, and Manpower, and based on a socio- Transmigratio Transmigratio economic approach, n Service n Service including: Office of Office of . Determination Solok Selatan Solok Selatan of wages and District. District.

salaries in . Energy and . Energy and accordance with Mineral Mineral Decent Standard Resources Resources of Living (KHL, Service Service Kebutuhan Hidup Office of Office of Layak), Solok Selatan Solok Selatan . Conducting District. District.

economic . Governments . Directorate empowerment of Nagari and General of

PT Supreme Energy Muara Laboh 687 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

8 Changes in social Operational Increasing Environmental In the vicinity of the During the SEML . Environmental . Environmental values and social worker public trust in management site, including, Pauh Duo operation Service Service norms as a result of recuitment the Company's programs to be Subdistrict and Sangir stage Office of Office of operational worker commitment to implemented to Subdistrict, Solok Selatan Solok Selatan Solok Selatan recruitment prioritize prevent or District. District. District. hiring locally mitigate potential . Social, . Social, or from jorong impacts will be Manpower,and Manpower, and and nagari that based on a socio- Transmigratio Transmigratio are directly economic approach, n Service n Service related to including: Office of Office of geothermal . Disseminating Solok Selatan Solok Selatan development information District. District. project. concerning . Energy and . Energy and labor Mineral Mineral recruitment in Resources Resources accordance with Service Service the principles Office of Office of of honesty and Solok Selatan Solok Selatan transparent District. District

justice, . Governments . Directorate . Initiating and of Nagari and General of implementing local KAN New and labor Renewable recruitment Energy and based on the Energy standards and Conservation

PT Supreme Energy Muara Laboh 688 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Implementing the commitment of prioritizing local hiring from area that directly related to the development of geothermal power plant project.

9. Changes in community Labor Decrease in Environmental In the vicinity of site, During the SEML . Environmental . Environmental perception recruitment negative management including Pauh Duo operation Service Service perceptions of programs to be Subdistrict and Sangir stage Office of Office of recruitment implemented to Subdistrict, Solok Selatan Solok Selatan Solok Selatan activity in prevent or District. District. District operation stage mitigate potential . Government of . Energy and impacts will be Pauh Duo Mineral based on a socio- Subdistrict Resources economic approach, . Energy and Service including: Mineral Office of . Providing Resources Solok Selatan skills training Service District. for laid-off Office of . Land Agency workers to be Solok Selatan of Solok competitive in District. Selatan getting new and . Land Agency District. better jobs, of Solok . Directorate . Providing Selatan General of information District. New and

PT Supreme Energy Muara Laboh 689 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

regarding job . Governments Renewable opportunities of Nagari and Energy and to the workers local KAN Energy laid-off as Conservation PLTP activities (EBTKE) have been completed.

PT Supreme Energy Muara Laboh 690 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

10. Public health Drilling of . Parameter to Environmental In the vicinity of site, During the SEML . Environmental . Environmental disorder/deterioration production well be monitored management including, Pauh Duo operation Service Service of public health and injection is programs to be Subdistrict and Sangir stage Office of Office of conditions. well, environmental implemented to Subdistrict, Solok Selatan Solok Selatan Solok Selatan production well based disease prevent or District District District mitigate potential testing, and that can . Social, . Energy and operation and cause impacts will be Labor,and Mineral maintenance of infection and based on a Transmigratio Resources well and is related to technological n Service Service geothermal degradation approach, Office of Office of power plant. of including: Solok Selatan Solok Selatan environment . Providing District District quality, adequate . Energy and . Health . Sanitation sanitation Mineral Service facilities facilities such Resources Office of such as clean as latrines, Service Solok Selatan water toilets, and Office of District supplies, trash bins Solok Selatan . Directorate latrines, around the District General of healthy house project areas, . Government of New and and garbage . Increasing Nagari and Renewable management. public local KAN. Energy and awareness of Energy environmental Conservation health by (EBTKE) providing educative information directl and indirectly

D Post Operation Stage

1. Changes in erosion and Rehabilitation/ Erosion rates Environmental Areas prone to erosion During the SEML . Environmental . Environmental

PT Supreme Energy Muara Laboh 691 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Continuing erosion and sedimentation management that have been implemented in the construction and operation phases.

PT Supreme Energy Muara Laboh 692 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2. Changes in surface Rehabilitation/ Sediment charge Areas prone to erosion During the SEML . Environmental . Environmental Environmental water runoff revegetation entering river along the access road, post- Service Service management is under wellpad area, and operation Office of Office of programs to be control and in geothermal power plant stage Solok Selatan Solok Selatan implemented to accordance with area no longer used. District. District. prevent or Governement . Energy and . Energy and mitigate potential Regulation No. Mineral Mineral impacts will be 82 of 2001 (<50 Resources Resources based on a mg/L). Service Service technological Office of Office of approach, Solok Selatan Solok Selatan including: District. District. . Tecnical and . Directorate vegetative General of erosion New and control. For Renewable example, by Energy and planting trees Energy perpendicular Conservation to flow or (EBTKE) parallel to contours or on open areas that are prone to erosion,

. Continuing erosion and sedimentation management that have been implemented since the

PT Supreme Energy Muara Laboh 693 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3. Changes in surface Rehabilitation/ TSS levels in Areas prone to erosion During the SEML . Environmental . Environmental Environmental water quality revegetation the river being along the access road, post- Service Service management under control = wellpad area, and operation Office of Office of programs to be Liki River geothermal power plant stage Solok Selatan Solok Selatan implemented to baseline of 4 area no longer used. District. District. prevent or mg/L, maximum < . Energy and . Energy and mitigate potential 50 mg/L Mineral Mineral impacts will be pursuant to Resources Resources based on a Government Service Service technological Regulation No. Office of Office of approach, 82 of 2001 Solok Selatan Solok Selatan including: District. District. . Controlling the . Directorate technical and General of vegetative New and erosion. For Renewable example, by Energy and planting trees Energy perpendicular Conservation to flow or (EBTKE) parallel to contours or on open areas that are prone to erosion,

. Continuing erosion and sedimentation management that

PT Supreme Energy Muara Laboh 694 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

4. Increasing terrestrial Rehabilitation/ . Total land of In areas where the During the SEML . Environmental . Environmental Environmental flora and fauna revegetation revegetated rehabilitation/revegetation post- Service Service management area, is done operation Office of Office of programs to be . Type of stage Solok Selatan Solok Selatan implemented to flora/vegetat District. District. prevent or ion planted, . Energy and . Energy and mitigate potential and Mineral Mineral impacts will be Resources Resources . Success rate based on a Service Service of technological Office of Office of revegetation approach, Solok Selatan Solok Selatan plant growth, including: District. District. . The existence Conducting . . Directorate of protected revegetation General of plants in using types of New and accordance plants suited Renewable with to the climatic Energy and Government and soil Energy Regulation conditions, Conservation No. 07 of such as guava, (EBTKE) 1999. Ficus sp., and grasses,

. Planting the project area using types of plants that

PT Supreme Energy Muara Laboh 695 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Prohibiting animal hunting and capturing and taking protected flora.

5. Disturbance on aquatic Rehabilitation/ Changes in the Areas prone to erosion During the SEML . Environmental . Environmental Environmental biota revegetation composition of along the access road, post- Service Service management aquatic biota wellpad area, and operation Office of Office of programs to be geothermal power plant stage Solok Selatan Solok Selatan implemented to area no longer used. District. District. prevent or . Energy and . Energy and mitigate potential Mineral Mineral impacts will be Resources Resources based on a Service Service technological Office of Office of approach, Solok Selatan Solok Selatan including: District. District. . Efforts to . Directorate minimize General of disturbance to New and aquatic biota Renewable is through Soil Energy and erosion and Energy sedimentation Conservation control, (EBTKE) management of surface water runoff, and management of

PT Supreme Energy Muara Laboh 696 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

6. Loss of employment Termination of The number and Environmental In the vicinity of site, During the SEML . Environmental . Environmental opportunity employment of proportion of management including Pauh Duo post- Service Service operations unemployment programs to be Subdistrict and Sangir operation Office of Office of labor resulting from implemented to Subdistrict, Solok Selatan stage Solok Selatan Solok Selatan the loss of prevent or District. District. District. jobs in the mitigate potential . Social, . Social, project. impacts will be Manpower, and Manpower, and based on a socio- Transmigratio Transmigratio economic approach, n Service n Service including: Office of Office of . Disseminating Solok Selatan Solok Selatan the project District. District.

closure plan to . Energy and . Energy and the workers, Mineral Mineral . Disseminating Resources Resources the plan for Service Service labor Office of Office of termination of Solok Selatan Solok Selatan employment , District. District.

. Providing fair . Governments . Directorate compensation to of Nagari and General of employees in local KAN New and accordance with Renewable applicable Energy and regulations, Energy . Disseminating Conservation information (EBTKE) concerning the end of the project

PT Supreme Energy Muara Laboh 697 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

7. Loss of business Termination of  Reduced Environmental In the vicinity of site, During the SEML . Environmental . Environmental opportunity employment of number and management including Pauh Duo post- Service Service operations proportion of programs to be Subdistrict, Sangir operation Office of Office of labor businesses in implemented to Subdistricti, Solok Selatan stage Solok Selatan Solok Selatan the post prevent or District.. District. District. operation mitigate potential . Social, . Social, stage, impacts will be Manpower, and Manpower, and based on a socio-  Amounts of Transmigratio Transmigratio economic approach, compensation n Service n Service including: provided as a Office of Office of result of . Disseminating Solok Selatan Solok Selatan termination the project District. District. of employment closure plan to . Energy and . Energy and is in the workers, Mineral Mineral accordance . Socializing the Resources Resources with plan for labor Service Service applicable termination of Office of Office of regulations. employment , Solok Selatan Solok Selatan . Providing fair District. District. compensation to . Governments . Directorate employees in of Nagari, General of accordance with KAN Alam Pauh New and applicable Duo and Pauh Renewable reguations, Duo Nan Energy and . Disseminating Batigo Energy information Conservation concerning the (EBTKE) end of project activities to the workers.

PT Supreme Energy Muara Laboh 698 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

8. Changes in community termination of The decreased Environmental In the vicinity of site, During the SEML . Environmental . Environmental income (decrease in employmnent of local community management including Pauh Duo post- Service Service community income due operation labor income due to programs to be Subdistrict, Sangir operation Office of Office of to termination of termination of implemented to Subdistrict, Solok Selatan stage Solok Selatan Solok Selatan employment. employment in prevent or District. District. District. the post mitigate potential . Social, . Social, operation stage. impacts will be Manpower, and Manpower, and based on a socio- Transmigratio Transmigratio economic approach, n Service n Service including: Office of Office of . Disseminating Solok Selatan Solok Selatan the project District. District.

. Providing fair . Governments . Directorate compensation to of Nagari, General of the employees KAN Alam Pauh New and in accordance Duo and Pauh Renewable with applicable Duo Nan Energy and regulations, Batigo Energy . Disseminating Conservation information (EBTKE) concerning the end of project activities to the workers.

9. Changes in community Termination of Decreasing in Environmental In the vicinity of site, During the SEML . Environmental . Environmental

PT Supreme Energy Muara Laboh 699 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

closure plan to . Energy and . Energy and the workers, Mineral Mineral . Disseminating Resources Resources the plan for Service Service termination of Office of Office of employment , Solok Selatan Solok Selatan

. Providing fair District. District. compensation to . Government of . Directorate the employees Nagari, KAN General of in accordance Alam Pauh Duo New and with applicable and Pauh Duo Renewable reguations, Nan Batigo Energy and

. Disseminating Energy information Conservation concerning the (EBTKE) end of project activities to the workers.

E . Management of Other Impacts

1. Heavy metals and Drilling wells, . Wastewater Environmental . Hazardous waste From SEML . Environmental . Environmental hazardous and toxic sump pits, and quality meets management construction Service Service

PT Supreme Energy Muara Laboh 700 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Regulation Waste . Directorate . Directorate No. 101 of . Disposing of General of General of 2014. solid waste in New and New and landfill. Renewable Renewable Energy and Energy and Liquid waste: Energy Energy . Treat domestic Conservation Conservation liquid waste (EBTKE) (EBTKE) from all activities at the project area in liquid waste treatment plants,

. Condensate and brine, produced during the production and operational testing of geothermal power plant, to be injected

PT Supreme Energy Muara Laboh 701 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Building sump pits covered with waterproof coating. Water collected in the sump pits will be used in the drilling process as drilling mud component and then will be reinjected into the injection well.

Hazardous and Toxic Waste: . Ensuring equipment and materials used by SEML do not contain PCBs, asbestos, ODS (ozone depleting substances), and other materials that are prohibited for use as

PT Supreme Energy Muara Laboh 702 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Neutralizing battery acid and store used lead acid batteries safely,

. Collecting used oil in drums and hand it over to a registered hazardous waste management company for further treatment,

. Takings in drilling mud will be collected in sump pits,

. Installing secondary containment around flammable and dangerous materials as needed,

PT Supreme Energy Muara Laboh 703 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Utilizing the drill taking after the permit for utilization is issued by the authorized agency,

. Periodically conducting training for workers in handling hazardous and toxic wastes.

PT Supreme Energy Muara Laboh 704

6.2 ENVIRONMENTAL MONITORING PLAN

6.2.1 Pre-Construction Stage

6.2.1.1 Socio-Economic and Culture Components

6.2.1.1.1 Land Tenure a. Type of Impact

. Changes in land tenure. b. Indicator / Parameter to be Monitored

. One of the indicators for successful monitoring is

that the changes in land tenure will not cause

conflict. c. Sources of Impact

. Land acquisition. d. Data Collection Methods and Analysis

. Data collection done through observations and

interviews,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Location of Environmental Monitoring

. Nagari Alam Pauh Duo and Pauh Duo Nan Batigo, Pauh Duo

Subdistrict. f. Timing and Frequency of Environmental Monitoring

PT Supreme Energy Muara Laboh 705 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental monitoring will be carried out once

during the pre-construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party : PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Government of Pauh Duo Subdistrict

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Governments of Nagari and local KAN

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.1.1.2 Community Perception a. Type of Impact

. Changes in community perception.

PT Supreme Energy Muara Laboh 706 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW b. Indicator/Parameter to be Monitored

. Decrease in negative perceptions on land acquisition. c. Sources of Impact

. Land acquisition. d. Data Collection Method and Analysis

. Data collection done through observations and

interviews,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Location of Environmental Monitoring

. Nagari Alam Pauh Duo and Pauh Duo Nan Batigo, Pauh Duo

Subdistrict, Solok Selatan District

Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once

during the pre-construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Government of Pauh Duo Subdistrict,

PT Supreme Energy Muara Laboh 707 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Land Agency of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2 Construction Stage

6.2.2.1 Physical and Chemical Components

6.2.2.1.1 Ambient Air Quality a. Type of Impact

. Changes in air quality. b. Indicators/Parameters to be Monitored

. Air quality from fugitive emissions and dispersed TSP

meet the standards pursuant to Government Regulation

No. 41 of 1999 (TSP ambient air standard < 230

µg/Nm3),

PT Supreme Energy Muara Laboh 708 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. H2S emission gas meets the standard pursuant to

Minister of Environment Regulation No. 21 of 2008 H2S

emission standards ( < 35 mg/Nm3),

. Odor level meets the H2S standards pursuant to

Minister of Environment Decision No. 50 of 1996 (H2S

odor level < 28 µg/Nm3). c. Sources of Impact

. Well production and injection well drilling,

production well testing, and emission and dispersion

from cooling tower stack during PLTP operation. d. Data Collection Methods and Analysis

. Ambient air measurement with TSP sampling in ambient

air using high volume sampler,

. Data analysis using SNI 19-7119.3-2005 method,

. Ambient H2S measurement. e. Locations of Environmental Monitoring

. Residential area in the location of project’s access road,

. H2S gas in ambient air at a distance of:

- > 500 m from cooling tower,

- >1,000 m from cooling tower. f. Timing and Frequency of Environmental Monitoring

PT Supreme Energy Muara Laboh 709 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental management will be carried out twice a

year during the construction stage g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.1.2 Noise Level a. Type of Impact

. Changes in noise level. b. Indicators /Parameters to be Monitored

. Noise levels meet the standards for residential area <

55 dB(A) and industrial area <70 dB(A) pursuant to

PT Supreme Energy Muara Laboh 710 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Decision of the Minister of the Environment No. 48 of

1996,

. For projects workers, Threshold Limit Values (TLV) for

working environment according to Circular Letter of

Minister of Manpower No. 01/MEN/ 97 (TLV working

environment < 85 dB(A)). c. Sources of Impact

. Production well and injection well drilling, and

production well testing. d. Data Collection Method and Analysis

. Noise level measurements using sound level meter,

. Data analysis in accordance with Regulation of the

Minister of the Environment No. 48 of 1996. e. Location of Environmental Monitoring

. Noise level measurements in residential area located

in project’s access road,

. Noise level measurement in PLTP within the work

environment of the Geothermal Power Plant and the

wellpads nearest the residential area. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

construction stage

PT Supreme Energy Muara Laboh 711 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Frequency of the monitoring is twice a year during the

construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.1.3 Erosion and Sedimentation a. Types of Impacts

. Changes in erosion and sedimentation. b. Indicators/Parameters to be Monitored

. Erosion rate is under control and in accordance with

Decision of Directorate General for Reforestation and

PT Supreme Energy Muara Laboh 712 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Rehabilitation of the Ministry of Forestry No.

041/Kpts/V/1998 (<15 ton/ha/of). c. Sources of Impact

. Land preparation. d. Data Collection Methods and Analysis

. Land erosion measurement using small square method,

. Rainfall monitoring. e. Location of Environmental Monitoring

. Areas prone to erosion along access road, well pad,

and geothermal power plant area. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

construction stage.

. Frequency of monitoring is twice a year during the

construction period/stage g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

PT Supreme Energy Muara Laboh 713 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.1.4 Surface Water Runoff a. Type of Impact

. Changes in surface water runoff. b. Indicators/ Parameter to be Monitored

. Sediment charge that will flow into the river is under

control according to Government Regulation No. 82 of

2001 (<50 mg/L). c. Sources of Impact

. Land preparation. d. Data Collection Method and Analysis

. Sediment charge sampling is taken in inlet and outlet

of the catch pond, and laboratory analysis for Total

Suspended Solids (TSS) uses SNI 06-6989.3-2004 method,

and simultaneously the effectiveness of the catch

ponds is to be determined.

PT Supreme Energy Muara Laboh 714 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW e. Locations for Environmental Monitoring

. Sediment charge in PLTP project sites,

. Inlet and outlet of the catch ponds, representing

sediment that can be well managed. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

construction stage.

. Frequency of environmental monitoring is twice, once

during wet season and once during dry seson during

land preparation g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 715 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.1.5 Surface Water Quality a. Type of Impact

. Changes in surface water quality. b. Indicators/Parameters to be Monitored

. TSS level in the river is under control = Liki River

baseline of 4 mg/L, maximum < 50 mg/L pursuant to

Government Regulation No. 82 of 2001 c. Sources of Impact

. Land preparation,

. Production well and injection well drilling,

production well testing. d. Data Collection Method and Analysis

. TSS in river sampling,

. Suspended Residue Sampling (TSS), then laboratory

analysis using SNI 06-6989.3-2004 method. e. Locations for Environmental Monitoring

. Sediment charge from Geothermal Power Plant project

sites.

. Inlet and outlet of catch pond, representing sediment

that can be well managed,

PT Supreme Energy Muara Laboh 716 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. TSS sampling from Bangko Jernih River, Bangko Keruh

River, and Liki River at:

- Outfall,

- 20 m upstream of outfall,

- 100 m downstream of outfall,

- 200 m downstream of outfall,

representing sediment that has passed into the river. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

construction stage.

. Monitoring frequency will be twice a year during the

construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 717 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.2 Biological Components

6.2.2.2.1 Terrestrial Flora and Fauna a. Type of Impact

. Disturbance to terrestrial flora and fauna. b. Indicators/Parameters to be Monitored

. Open land as needed. c. Sources of Impact

. Land preparation. d. Data Collection Methods and Analysis

. Data collection method through inventory/direct

observation on the area to be cleared and revegetated.

. Data analysis through vegetation analysis. e. Location of Environmental Monitoring

. Environmental monitoring of the revegetated sites. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

construction stage after land preparation phase.

PT Supreme Energy Muara Laboh 718 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Frequence is twice a year during construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Forestry Service Office of Solok Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Forestry Service Office of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.2.2 Aquatic Biota a. Type of Impact

. Disturbance to aquatic biota. b. Indicators/Paramaters to be Monitored

PT Supreme Energy Muara Laboh 719 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Changes in aquatic biota composition in the land to be

cleared.

. Changes in aquatic biota composition. c. Sources of Impact

. Land preparation,

. Production well and injection well drilling, and

production well testing. d. Data Collection Methods and Analysis

. Data analysis number of types, composition, abundance,

and diversity of plankton and benthos e. Location of Environmental Monitoring

. Rivers near activity locations (Bangko Jenih, Bangko

Keruh, and Liki River). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

the construction stage

. Frequency is twice a year during the construction

stage g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

PT Supreme Energy Muara Laboh 720 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE)

6.2.2.3 Socio-Economic and Culture Components

6.2.2.3.1 Job Opportunities a. Type of Impact

. Job opportunities. b. Indicators/Parameters to be Monitored

. Number and proportion of local workforce employed

during the construction stage. c. Sources of Impact

. Labor recruitment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

PT Supreme Energy Muara Laboh 721 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Data analysis performed with comparative and

descriptive qualitative methods. e. Location of Environmental Monitoring

. In the vicinity of site (Nagari Alam Pauh Duo and Pauh

Duo Nan Batigo). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party : PT Supreme Energy Muara Laboh

2) Supervising Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo, and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 722 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.3.2 Business Opportunities a. Type of Impact

. Business opportunities. b. Indicators/Parameters to be Monitored

. Number and proportion of local workforce employed

during construction stage,

. Number and proportion of new business opened during

operation of PLTP Muara Laboh development project. c. Sources of Impact

. Labor recruitment,

. Termination of employment. d. Data Collection Method and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

PT Supreme Energy Muara Laboh 723 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistrict). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

PT Supreme Energy Muara Laboh 724 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.3.3 Community Income a. Type of Impact

. Changes in community income. b. Indicators/Parameters to be Monitored

. Changes in community income from labor recruitment

and labor lay off activities during construction

stage. c. Sources of Impact

. Labor recruitment,

. Termination of employment d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of project location (Nagari Alam Pauh

Duo and Pauh Duo Nan Batigo). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the construction stage.

PT Supreme Energy Muara Laboh 725 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.3.4 Social Values and Norms a. Type of Impact

. Changes in values and social norms from construction

workforce recruitment.

PT Supreme Energy Muara Laboh 726 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW b. Indicators/Parameters to be Monitored

. Changes in social values and norms, and also local

traditions. c. Sources of Impact

. Construction labor recruitment activities,

. Termination of Employment of Construction labor. d. Data Collection Methods and Analysis

. Data recorded from formal and informal meetings with

community figures and members,

. Data analysis performed in comparative and descriptive

qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of the activity site (Pauh Duo

Subdistrict and Sangir Subdistrict). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

PT Supreme Energy Muara Laboh 727 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE)

6.2.2.3.5 Community Perception

a. Type of Impact

. Changes in community perception.

b. Indicators of Environmental Monitoring Success

. Decreased negative perception of workforce

recruitment activity during construction stage,

. Decreased negative perception of production well and

injection well drilling, production well testing

during construction and development of PLTP.

PT Supreme Energy Muara Laboh 728 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

c. Sources of Impact

. Labor recruitment,

. Production well and injection well drilling,

production well testing, and development of PLTP.

d. Data Collection Methods and Analysis

. Data collection on community perceptions,

. Data analysis performed with comparative and

descriptive qualitative methods.

e. Locations for Environmental Monitoring

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistrict).

f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the construction stage.

g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 729 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencie:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.2.4 Public Health Components a. Type of Impact

. Disturbance to public health/deterioration in public

health status. b. Indicators / Parameters to be Monitored

. Parameters to be monitored are infectious

environmental disease types impacting to the degrading

of environmental quality,

. Environmental sanitation facilities which include

clean water supply, toilets, healthy house, and solid

waste management.

PT Supreme Energy Muara Laboh 730 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Sources of Impact

. Production well and injection well drilling, and

production well testing d. Data Collection Methods and Analysis

. Interviews with the head of projects and secondary

data collection from Community Health Centre

(Puskesmas),

. Interviews with community figures and health clinic

employees regarding environmental disease pattern. e. Locations for Environmental Monitoring

. In the vicinity of site (Nagari Alam Pauh Duo and Pauh

Duo Nan Batigo). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once

every year during the construction stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 731 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Health Service Office of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Health Service Office of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.3 Operation Stage

6.2.3.1 Physical and Chemical Components

6.2.3.1.1 Ambient Air Quality a. Type of Impact

. Changes in air quality. b. Indicators of Environmental Monitoring Success

. Air quality from fugitive emissions and dispersed TSP

meet the applicable standards in accordance with

Government Regulation No. 41 of 1999 (TSP ambient air

standard < 230 µg/Nm3),

. Gas emission and dispersion from cooling tower stack

during operation of PLTP,

PT Supreme Energy Muara Laboh 732 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. H2S gas emission meets the applicable standards

pursuant to Minister of Environment Regulation No. 21

3 of 2008 - H2S emission < 35 mg/Nm ),

. Odor level meets the H2S standard pursuant to Minister

of Environment Decision No. 50 of 1996 - H2S odor

level < 28 µg/Nm3). c. Sources of Impact

. Production well and injection well drilling,

production well testing, and emission and dispersion

from cooling tower stack during operation of PLTP,

. Commissioning,

. Turbine operation and condensate. d. Data Collection Methods and Analysis

. Ambient air measurements with TSP sampling in ambient

air using high volume sampler,

. Data analysis using SNI 19-7119.3-2005 method,

. H2S gas measurement in ambient air e. Locations for Environmental Monitoring

. Residential area located in the project’s access road

. H2S gas in ambient air at distances:

- > 500 m from cooling tower,

- >1,000 m from cooling tower. f. Timing and Frequency of Environmental Monitoring

PT Supreme Energy Muara Laboh 733 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental monitoring will be carried out during

the operation stage.

. Frequency of monitoring is once every 6 (six) months. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (ETKE).

6.2.3.1.2 Noise a. Type of Impact

. Changes in noise level. b. Indicators of Environmental Monitoring Success

. Noise levels meet the applicable standards for

residential < 55 dB(A) and industrial <70 dB(A) area

PT Supreme Energy Muara Laboh 734 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

according to Minister of Environment Decision No. 48

of 1996,

. For project workers, Threshold Limit Values (TLV) for

working environment according to Circular Letter of

Minister of Labor No. 01/MEN/ 97 (TLV working

environment < 85 dB(A)). c. Sources of Impact

. Production well and injection well drilling, and

production well testing,

. Commissioning,

. Turbine and condensate operation. d. Data Collection Methods and Analysis,

. Noise level measurement using sound level meter,

. Data analysis in accordance with Minister of

Environmental Regulation No. 48 of 1996. e. Locations for Environmental Monitoring

. Noise level measurement in residential area located

in the project’s access road.

. Noise level measurements in PLTP working area and the

wellpad nearest to residential area. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

the operation stage.

PT Supreme Energy Muara Laboh 735 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Frequency of monitoring is once every 6 (six) months. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.3.1.3 Surface Water Runoff a. Type of Type of Impact

. Changes in surface water quality b. Indicators/Parameters to be Monitored

. TSS levels in the river is under control = Liki River

baseline of 4 mg/L, maximum < 50 mg/L pursuant to

Government Regulation No. 82 of 2001

PT Supreme Energy Muara Laboh 736 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW c. Sources of Impact

. Production well and injection well drilling, and

production well testing,

. Turbine opeation and condensate. d. Data Collection Methods and Analysis

. River TSS sampling,

. Total Suspended Solid (TSS) sampling; laboratory

analysis using SNI 06-6989.3-2004 method. e. Locations for Environmental Monitoring

. Sediment loads at PLTP project site,

. Inlet and outlet of catch pond, representing sediment

that can be managed,

. TSS sampling from Bangko Jernih River, Bangko Keruh

River, and Liki River at:

- Outfall,

- 20 m upstream of outfall,

- 100 m downstream of outfall,

- 200 m downstream of outfall,

representing sediment that has passed into the river. f. Timing and Frequency of Environmental Management

. Environmental monitoring will be carried out during

the operation stage.

PT Supreme Energy Muara Laboh 737 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Frequency of monitoring is once every 6 (six) months g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.3.2 Biological Components

6.2.3.2.1 Aquatic Biota a. Type of Impact

. Disturbance to aquatic biota. b. Indicators / Parameters to be Monitored

. Changes in aquatic biota composition. c. Sources of Impact

PT Supreme Energy Muara Laboh 738 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Production well and injection well drilling,

production well testing, well and PLTP operation and

maintenance. d. Data Collection Methods and Analysis

. Data analysis number of types, composition, abundance,

and diversity of plankton and benthos e. Locations for Environmental Management

. Rivers near activity locations (Bangko Jenih, Bangko

Keruh, and Liki River). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out during

the operation stage.

. Frequency of monitoring is once every six months.

g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

PT Supreme Energy Muara Laboh 739 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE)

6.2.3.3 Socio-Economic and Culture Components

6.2.3.3.1 Employment Opportunities a. Type of Impact

. Employment opportunities. b. Indicators/Parameters to be Monitored

. Number and proportion of local workforce employed

during the operation stage. c. Sources of Impact

. Labor recruitment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

PT Supreme Energy Muara Laboh 740 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. In the vicinity of site (Pauh Duo Subdistrict and

Kecamatan Sangari). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

PT Supreme Energy Muara Laboh 741 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE)

6.2.3.3.2 Business Opportunities a. Type of Impact

. Business opportunities. b. Indicators/Parameters to be Monitored

. Number and proportion of businesses absorbed during

the operation stage. c. Sources of Impact

. Labor recruitment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistricti. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the operation stage. g. Institutions for Environmental Monitoring

PT Supreme Energy Muara Laboh 742 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.3.3.3 Community Income a. Type of Impact

. Changes in community income. b. Indicators/Parameters to be Monitored

PT Supreme Energy Muara Laboh 743 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Increased local community income from increased

workforce recruitment during the operation stage. c. Sources of Impact

. Labor recruitment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistrict).

Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 744 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.3.3.4 Social Values and Norms a. Type of Impact

. Changes in social values and norms from operational

workforce recruitment. b. Indicators/Parameters to be Monitored

. Changes in values and social norms, and also local

traditions. c. Sources of Impact

. Labor recruitment activities for operation

PT Supreme Energy Muara Laboh 745 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW d. Data Collection Methods and Analysis

. Data recorded from formal and informal meetings with

community figure and members,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistricti). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

PT Supreme Energy Muara Laboh 746 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.3.3.5 Community Perception a. Type of Impact

. Changes in community perception. b. Indicators/Parameters to be Monitored

. Decreased negative perception on land acquisition and

from labor recruitment activity during operation

stage,

. Decreased negative perception of production well and

injection well drilling, production well testing,

also well and PLTP operation and maintenance. c. Sources of Impact

. Labor recruitment,

PT Supreme Energy Muara Laboh 747 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Production well and injection well drilling,

production well testing, and well and PLTP operation

and maintenance. d. Data Collection Methods and Analysis

. Data collection of community perception,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistrict) f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the operation stage.

g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

PT Supreme Energy Muara Laboh 748 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Governments of Nagari and local KAN

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.3.4 Public Health Components a. Environmental Impact to be Monitored

. Disturbance to public health/deterioration in public

health status. b. Indicators of Environmental Monitoring Success

. Parameter to be monitored is infectious environmental

disease types related to the impact of environment

quality degradation,

. Environmental sanitation facilities, which include

clean water supplies, toilets, healthy houses, and

solid waste management. c. Sources of Impact

PT Supreme Energy Muara Laboh 749 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Production well and injection well drilling,

production well testing, and well and PLTP operation

and maintenance. d. Data Collection Methods and Analysis

. Interviews with project head and secondary data

collection from community health centre (Puskesmas),

. Interviews with community figures and health clinic

employees regarding environmental disease pattern. e. Locations for Environmental Monitoring

. In the vicinity of project site.

Timing and f. Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Health Service Office of Solok Selatan District,

. Governments of Nagari and local KAN

PT Supreme Energy Muara Laboh 750 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Health Service Office of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4 Post Operation Stage

6.2.4.1 Physical and Chemical Components

6.2.4.1.1 Erosion and Sedimentation a. Type of Impact

. Changes in erosion and sedimentation. b. Indicators/Parameters to be Monitored

. Erosion rate is controlled pursuant to Minister of

Forestry, Directorate General for Reforestation and

Rehabilitation Decision No. 041/Kpts/V/1998 (<15

ton/ha/of). c. Sources of Impact

. Rehabilitation/re-vegetation. d. Data Collection Method and Analysis

. Land erosion measurement using small square method.

PT Supreme Energy Muara Laboh 751 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW e. Locations for Environmental Monitoring

. Areas prone to erosion along access road, well pad,

and geothermal power plant area. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once

every six months during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies :

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4.1.2 Surface Water Runoff Rates a. Type of Impact

PT Supreme Energy Muara Laboh 752 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Changes in surface water runoff. b. Indicators/Parameters to be Monitored

. Sediment charge going into river is under control

according to Government Regulation No. 82 of 2001 (<50

mg/L). c. Sources of Impact

. Rehabilitation/re-vegetation. d. Data Collection Method and Analysis

. Sediment loads sampling in inlet and outlet of catch

pond, and laboratory analysis for Total Suspended

Solids (TSS) using SNI 06-6989.3-2004 method, as well

as determining the effectiveness of the catch pond. e. Locations for Environmental Monitoring

. Sediment loads at PLTP project site,

. Inlet and outlet of catch pond, representing sediment

that can be well managed. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once

every six months during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

PT Supreme Energy Muara Laboh 753 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4.1.3 Surface Water Quality a. Type of Impact

. Changes in surface water quality. b. Indicators/Parameters to be Monitored

. TSS levels in the river are under control = Liki

River baseline of 4 mg/L, maximum < 50 mg/L pursuant

to Government Regulation No. 82 of 2001 c. Sources of Impact

. Rehabilitation/re-vegetation. d. Data Collection Methods and Analysis

PT Supreme Energy Muara Laboh 754 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. TSS river sampling,

. TSS laboratory analysis using SNI 06-6989.3-2004

method. e. Locations for Environmental Monitoring

. TSS sampling from Bangko Jernih River, Bangko Keruh

River, and Liki River at:

- Outfall,

- 20 m upstream of outfall,

- 100 m downstream of outfall,

- 200 m downstream of outfall,

representing sediment that has passed into the river. f. Timing and Frequency of Environmental Management

. Environmental monitoring will be carried out once

every six months during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

PT Supreme Energy Muara Laboh 755 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4.2 Biological Components

6.2.4.2.1 Terrestrial Flora and Fauna a. Type of Impact

. Disturbance to terrestrial flora and fauna. b. Indicators/Parameters to be Monitored

. Re-vegetated area, type of planted flora/vegetation,

and success rate of re-vegetated plant growth,

presence of protected flora refers to Government

Regulation No. 07 of 1999, and diversity index. c. Sources of Impact

. Rehabilitation/re-vegetation. d. Data Collection Methods and Analysis

. Data collection method through inventory/direct

observation on the area to be revegetated.

. Data analysis through vegetation analysis. e. Locations for Environmental Monitoring

PT Supreme Energy Muara Laboh 756 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Monitoring at all rehabilitated/re-vegetated areas. f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once

every six months during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Forestry Service Office of Solok Selatan District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Forestry Service Office of Solok Selatan District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

6.2.4.2.2 Aquatic Biota a. Type of Impact

PT Supreme Energy Muara Laboh 757 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Disturbance to aquatic biota. b. Indicators/Parameters to be Monitored

. Changes in aquatic biota composition. c. Sources of Impact

. Rehabilitation/re-vegetation. d. Data Collection Method and Analysis

. Data analysis of the types, composition, abundance,

and diversity of plankton and benthos e. Locations for Environmental Monitoring

. Rivers near activity locations (Bangko Jenih, Bangko

Keruh, and Liki River). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once

every six months during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District.

PT Supreme Energy Muara Laboh 758 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4.3 Socio-Economic and Culture Components

6.2.4.3.1 Employment Opportunities a. Type of Impact

. Decrease in job opportunities. b. Indicators of Environmental Management Success

. Number and proportion of unemployment as a result of

workforce layoff from project activity. c. Sources of Impact

. Termination of Employment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

PT Supreme Energy Muara Laboh 759 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistrict). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

PT Supreme Energy Muara Laboh 760 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Directorate General of New and Renewable Energy, and

Energy Conservation. (EBTKE).

6.2.4.3.2 Business Opportunities a. Type of Impact

. Decrease in business opportunities. b. Indicators / Parameters to be Monitored

. Decreasing number and proportion of businesses during

the post operation stage. c. Sources of Impact

. Termination of Employment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of site (Pauh Duo Subdistrict and

Sangir Subdistrict). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the post operation stage.

g. Institutions for Environmental Monitoring

PT Supreme Energy Muara Laboh 761 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo, and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4.3.3 Community Income a. Type of Impact

. Changes in community income. b. Indicators/Parameters to be Monitored

PT Supreme Energy Muara Laboh 762 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Decreased community income from workforce lay off

activities during the post operation stage. c. Source of Impact

. Termination of Employment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of project location (Pauh Duo

Subdistrict and Sangir Subdistrict). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 763 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Social, Manpower, and Transmigration Service Offfice

of Solok Selatan District,

. Governments of Nagari and local KAN.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Offfice

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.4.3.4 Community Perception a. Environmental Impact to be Monitored

. Changes in community perception. b. Indicators/Parameters to be Monitored

. Decreased negative perception to closure activities

for production well, injection well, pipeline

demobilization and demobilization of supporting

facilities and PLTP at post operation stage,

. Decreased negative perceptions of workforce layoff

activity during the post operation stage. c. Sources of Impact

PT Supreme Energy Muara Laboh 764 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Closure of production well, injection well,

demobilization of pipeline and supporting facilities,

also Geothermal Power Plant demobilization.

. Termination of Employment. d. Data Collection Methods and Analysis

. Secondary data collection from HRD of SEML,

. Data analysis performed with comparative and

descriptive qualitative methods. e. Locations for Environmental Monitoring

. In the vicinity of project locations (Pauh Duo

Subdistrict and Kecamatan Sangari). f. Timing and Frequency of Environmental Monitoring

. Environmental monitoring will be carried out once a

year during the post operation stage. g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

PT Supreme Energy Muara Laboh 765 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Governments of Nagari, KAN Alam Pauh Duo, and Pauh

Duo Nan Batigo.

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Social, Manpower, and Transmigration Service Office

of Solok Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation (EBTKE).

6.2.5 Other Impact Monitoring

a. Type of Impacts

. Non-industrial solid waste: type and amount of solid

waste collected, transported, disposed at landfill

and recycled,

. Domestic liquid waste: Biochemical Oxygen Demand,

Chemical Oxygen Demand, Total Suspended Solids and

pH,

. Type and amount of hazardous and toxic wastes and,

. Spills: spills type and amount.

PT Supreme Energy Muara Laboh 766 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

b. Indicators/Parameters to be Monitored

. Comply with Minister of Energy and Mineral Resources

Regulation No. 045 of 2006 regarding Drilling Mud

Requirement and Management,

. Comply with the applicable regulation on hazardous

and toxic treatment (Government Regulation No. 18 of

1999 and Government Regulation No. 85 of 1999).

c. Sources of Impact

. Municipal solid waste,

. Domestic liquid waste from Liquid Waste Treatment

Plant (IPAL), and

. Any activities producing hazardous and toxic waste

d. Data Collection Methods and Analysis

. Measure the amount of solid waste generated by

counting the total number of trucks carrying solid

waste to dispose at landfill,

. Collect, prepare, and analyze water sample from all

domestic liquid waste treatment plant outlets

according to SEML protocol based on SNI, also conduct

measurement of pH, conductivity, and temperature of

water sampling (in situ),

. Monitor that Standard Operating Procedures (SOP) for

the prevention of oil spills is implemented

appropriately.

PT Supreme Energy Muara Laboh 767 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Monitor that the Standard Operating Procedures (SOP)

for hazardous and toxic waste handling and disposal

is implemented appropriately.

e. Locations for Environmental Monitoring

. Domestic solid waste landfill,

. Domestic Liquid Waste Treatment Plant,

. Location for the collection of hazardous and

toxic waste

f. Timing and Frequency of Environmental Monitoring

During construction stage until operation stage:

. Solid waste: every Timing solid waste is disposed

to landfill,

. IPAL: once every six months (twice a year); and

. At the location where hazardous and toxic waste is

collected : once every six months

(twice a year).

g. Institutions for Environmental Monitoring

1) Implementing Party: PT Supreme Energy Muara Laboh

2) Supervising Agencies:

PT Supreme Energy Muara Laboh 768 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

3) Report Receiving Agencies:

. Environmental Service Office of Solok Selatan

District,

. Energy and Mineral Resources Service Office of Solok

Selatan District,

. Directorate General of New and Renewable Energy, and

Energy Conservation.

(EBTKE)

PT Supreme Energy Muara Laboh 769

Table VI-2 Environmental Monitoring Plan Matrix of Geothermal Development Activities for 250 MW Muara Laboh Geothermal Power Plant by PT Supreme Energy

Muara Laboh

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

A. Pre-Construction Stage

1. Changes in land One of the Land acquisition. . Data Pauh Duo Once during SEML . Environemntal . Environemntal tenure. indicators for collection Subdistrict and the pre- Agency of Agency of Solok

successful done through Sangir constructio Solok Selatan Selatan District n stage. management is that observations Subdistrict District . Energy and

the changes in and . Government of Mineral Resources land tenure will interviews, Pauh Duo Service Office of not cause conflict . Data analysis Subdistrict. Solok Selatan performed . Energy and District. with Mineral . Land Agency of comparative Resources Solok Selatan and Service District. descriptive Office of . Directorate qualitative Solok Selatan General of New methods. District Energy, Renewable . Land Agency and Energy of Solok Conservation Selatan (EBTKE) District . Nagari Government and local KAN

2. Changes in Decrease in Land acquisition. . Data Pauh Duo Once during SEML . Environmental . Environmental community negative collection Subdistrict and the pre- Service Service Office of

perception perceptions on done through Sangir constructio Office of Solok Selatan

PT Supreme Energy Muara Laboh 770 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

interviews, . Government of Mineral Resources . Data analysis Pauh Duo Service Office of performed Subdistrict Solok Selatan iwith . Energy and District. comparative Mineral . Land Agency of and Resources Solok Selatan descriptive Service District. qualitative Office of . Directorate methods. Solok Selatan General of New District. Energy, Renewable . Land Agency and Energy of Solok Conservation Selatan (EBTKE) District. . Governments of Nagari and local KAN

B. Construction Stage

1. Changes in air . Air quality Well production and . Ambient air . Residential Twice SEML . Environmental . Environemntal quality. from fugitive injection well drilling, measurement area located during the Service Agency of Solok emissions and production well testing, with TSP in the constructio Office of Selatan District dispersed TSP and emission and sampling in project’s n stage Solok Selatan . Energy and meet TSP dispersion from cooling ambient air access road. District. Mineral Resources ambient tower stack during using high . Gas H2S in . Energy and Service Office of standard Geothermal Power Plant volume ambient air Mineral Solok Selatan according to operation. sampler, with distance: Resources District. Government . Data analysis - > 500 m from Service . Directorate Regulation No.

PT Supreme Energy Muara Laboh 771 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

Data Collection No. Indicator/Paramete Monitoring Duration Implementin Supervising Report Receiving Type of Impact Source of Impact Methods and r Locations and Period g Party Agencies Agencies Analysis 41 of 1999 using SNI 19- cooling Office of General of New (Applicable 7119.3-2005 tower, Solok Selatan and Renewable

standard of TSP method, - >1,000 m from District. Energy and Energy ambient < 230 Conservation . H2S data cooling 3 µg/Nm ), measurement in tower. (EBTKE) . Emission and ambient air. gas dispersion from cooling tower stack when Geothermal Power Plant is in operation.

. H2S emission gas meets the applicable standard in accordance with Minister of Environment Regulation No. 21 of 2008 on appplicable

standard of H2S emission (< 35 mg/Nm3),

. Odor level

meets the H2S standards in accordance with Decision of the

PT Supreme Energy Muara Laboh 772 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

H2S odor level (< 28 µg/Nm3).

2. Changes in noise . Noise levels Production well and . Noise level . Noise level Twice SEML . Environmental . Environmental level. meet the injection well drilling, measurements measurements during the Service Service Office of applicable and production well using sound in constructio Office of Solok Selatan standards for testing. level meter, residential n stage Solok Selatan District residential . Data analysis area located District. . Energy and area< 55 dB(A) in accordance in the . Energy and Mineral Resources and industrial with project’s Mineral Service Office of area <70 dB(A) Regulation of access road Resources Solok Selatan according to the Minister . Noise level Service District. Decision of the of the measurement Office of . Directorate Minister of the Environment in PLTP Solok Selatan General of New Environment No. No. 48 of working District. and Renewable 48 of 1996, 1996. environment Energy and Energy . s For project’ and the Conservation workers, wellpad

Threshold Limit nearest to Values (TLV) residential for working area. environment according to Circular Letter of Minister of Manpower No. 01/MEN/ 97 (TLV working

PT Supreme Energy Muara Laboh 773 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

3. Changes in erosion Erosion rate Land preparation . Land erosion Areas prone to Twice SEML . Environemntal . Environmental and sedimentation comply with measurement erosion along during Agency of Service Office of Decision of using small access road, constructio Solok Selatan Solok Selatan Directorate square method, well pad, and n stage District District General for . Rainfall geothermal power . Energy and . Energy and Reforestation and measurement. plant area Mineral Mineral Resources Rehabilitation of Resources Service Office of the Ministry of Service Solok Selatan Forestry No. Office of District 041/Kpts/V/1998 Solok Selatan . Directorate (<15 ton/ha/of). District General of New

and Renewable Energy and Energy Conservation (EBTKE)

4. Changes in surface Sediment charge Land preparation Sediment charge . Sediment loads Twice SEML . Environmental . Environmental water runoff flowing into sampling in from wellpads during the Service Service Office of river is under inlet and outlet of PLTP constructio Office of Solok Selatan control according of the catch project sites, n stage Solok Selatan District pond, and to Government . Inlet and District . Energy and laboratory Regulation No. 82 outlet of the . Energy and Mineral Resources of 2001 (<50 mg/L) analysis for catchpond, Mineral Service Office of Total Suspended representing Resources Solok Selatan Solids (TSS) sediment that Service District using SNI 06- can be Office of . Directorate 6989.3-2004

PT Supreme Energy Muara Laboh 774 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

Data Collection No. Indicator/Paramete Monitoring Duration Implementin Supervising Report Receiving Type of Impact Source of Impact Methods and r Locations and Period g Party Agencies Agencies Analysis method, as well managed. Solok Selatan General of New as determine the District and Renewable effectiveness of Energy and Energy catch ponds. Conservation (EBTKE)

5. Changes in surface TSS level in the . Land preparation, . TSS in river . Sediment Twice SEML . Environmental . Environmental water quality river is under . Production well and sampling, charge of the during the Service Service Office of control = Liki injection well . Suspended wellpad area constructio Office of Solok Selatan River baseline of drilling, production Residue of PLTP n stage Solok Selatan District 4 mg/L, maximum < well testing. Sampling project sites, District . Energy and 50 mg/L pursuant (TSS), then . Inlet and . Energy and Mineral Resources to Government the outlet of the Mineral Service Office of Regulation No. 82 Laboratory catch pond, Resources Solok Selatan of 2001 analysis representing Service District using SNI 06- sediment that Office of . Directorate 6989.3-2004 can be Solok Selatan General of New method. managed, District and Renewable . TSS sampling Energy and Energy from Bangko Conservation Jernih River, (EBTKE) Bangko Keruh River, and Liki River at:

- Outfall,

- 20 m upstream of outfall,

- 100 m

PT Supreme Energy Muara Laboh 775 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

- 200 m downstream of outfall, representin g sediment that has discharged into the river.

6. Disturbance to Open land as Land preparation . Data Environmental Twice SEML . Environmenta . Environmental terrestrial flora needed. collection monitoring of during the l Service Service Office of and fauna. method through the site to be constructio Office of Solok Selatan inventory/dire opened and n stage Solok District, ct observation revegetation has Selatan . Energy and Mineral of the area to been carried District, Resources Service be cleared and out. . Energy and Office of Solok re-vegetated. Mineral Selatan District,

. Data analysis Resources . Forestry Service through Service Office of Solok vegetation Office of Selatan District, analysis. Solok . Directorate Selatan General of New and District, Renewable Energy, . Forestry and Energy Service Conservation Office of (EBTKE) Solok

PT Supreme Energy Muara Laboh 776 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

7. Disturbance to . Changes in . Land preparation, Data analysis of Rivers near Twice SEML . Environmental . Environmental aquatic biota aquatic . Production well and number of types, activity during the Service Service Office of biota injection well composition, locations constructio Office of Solok Selatan composition drilling, and abundance, and (Bangko Jenih, n stage Solok Selatan District diversity of in the area production well Bangko Keruh, District . Energy and plankton and to be testing. and Liki River) . Energy and Mineral Resources benthos opened. Mineral Service Office of

. Changes in Resources Solok Selatan aquatic Service District biota Office of . Directorate composition. Solok Selatan General of New District and Renewable Energy and Energy Conservation (EBTKE)

8. Opening up of Number and Labor recruitment . Secondary In the vicinity O nce a year SEML . Environmental . Environmental Employment proportion of data of site (Pauh during Service Service Office of opportunities local workforce collection Duo Subdistrict constructio Office of Solok Selatan employed during from HRD of and Kecamatan n stage Solok Selatan District, the SEML, Sangari) District, . Energy and construction . Data analysis . Energy and Mineral Resources stage. performed Mineral Service Office of with Resources Solok Selatan comparative Service District and Office of . Social, Manpower, descriptive Solok Selatan and qualitative District Transmigration

PT Supreme Energy Muara Laboh 777 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

methods. . Social, Service Office of Manpower, and Solok Selatan Transmigratio District. n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation of Nagari and (EBTKE) local KAN

9. Opening Up of . Number and . Labor recruitment, . Secondary In the vicinity O nce a SEML . Environmental . Environmental Business proportion of . Termination of data of site (Nagari year, Service Service Office of opportunities local workforce Employment. collection Alam Pauh Duo during Office of Solok Selatan employed during from HRD of and Pauh Duo Nan constructio Solok Selatan District, construction SEML, Batigo) n stage, District, . Energy and stage, . Data . Energy and Mineral Resources . Number and analysis Mineral Service Office of proportion of performed Resources Solok Selatan new businesses with Service District

abbsorbed comparative Office of . Social, Manpower, during and Solok Selatan and operation of descriptive District Transmigration PLTP Muara qualitative . Social, Service Office of Laboh methods. Manpower, and Solok Selatan development Transmigratio District.

project. n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation

PT Supreme Energy Muara Laboh 778 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

10 Changes in Increased . Labor recruitment, . Secondary In the vicinity Once a SEML . Environmental . Environmental . community income community income . Ttermination of data of site (Pauh year, Service Service Office of from labor employment collection Duo Subdistrict during the Office of Solok Selatan recruitment and from HRD of and Sangir constructio Solok Selatan District,

termination of SEML, Subdistrict) n stage District, . Energy and employment during . Data analysis . Energy and Mineral Resources construction stage performed Mineral Service Office of with Resources Solok Selatan comparative Service District and Office of . Social, Manpower, descriptive Solok Selatan and qualitative District Transmigration methods. . Social, Service Office of Manpower, and Solok Selatan Transmigratio District.

n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation of Nagari and (EBTKE) local KAN

11 Changes in social Changes in social . labor recruitment . Data recorded In the vicinity Once a SEML . Environmental . Environmental . values and norms values and norms, workforce termination from formal of site year, Service Service Office of and also local of employment and informal (Kecamatan Pauh during Office of Solok Selatan meetings with Duo and Sangir constructio Solok Selatan

PT Supreme Energy Muara Laboh 779 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

community . Energy and . Energy and figures Mineral Mineral Resources . Data analysis Resources Service Office of performed in Service Solok Selatan comparative Office of District

and Solok Selatan . Social, Manpower, descriptive District and qualitative . Social, Transmigration methods. Manpower, and Service Office of Transmigratio Solok Selatan n Service District.

Offfice of . Directorate Solok Selatan General of New District. and Renewable . Governments Energy and Energy of Nagari, Conservation KAN Alam Pauh (EBTKE) Duo, and Pauh Duo Nan Batigo.

12 Changes in . Decreased . Labor recruitment . Data In the vicinity Once a SEML . Environmental . Environmental . community negative . Production well and collection on of site year, Service Service Office of perception perception of injection well community (Kecamatan Pauh during Office of Solok Selatan labor drilling, production perceptions, Duo and Sangir constructio Solok Selatan District recruitment well testing, and . Data analysis Subdistrict) n stage District. . Energy and activity during development of PLTP. performed with . Energy and Mineral Resources construction comparative Mineral Service Office of stage, and Resources Solok Selatan

PT Supreme Energy Muara Laboh 780 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

. Decreased descriptive Service District. negative qualitative Office of . Social, Manpower, perception of methods. Solok Selatan and production well District. Transmigration and injection . Social, Service Office of well drilling, Manpower, and Solok Selatan production well Transmigratio District. testing during n Service . Directorate construction Office of General of New and development Solok Selatan and Renewable of PLTP. District Energy and Energy . Governments Conservation of Nagari and (EBTKE) local KAN

PT Supreme Energy Muara Laboh 781 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

13 Disturbance to . Parameter to be Production well and . Interviews In the vicinity Once a SEML . Environmenta . Environmental . public monitored are injection well drilling, with project of site (Pauh year, l Service Service Office of health/deterioratio environmental and production well head and Duo Subdistrict during Office of Solok Selatan n in public health infectious testing. secondary and Sangir constructio Solok District status disease types data Subdistrict). n stage Selatan . Energy and

impacting to collection District Mineral Resources the degrading from . Energy and Service Office of environmental community Mineral Solok Selatan quality, health centre Resources District (Puskesmas), . Environmental Service . Health Service sanitation . Interviews Office of Office of Solok facilities with Solok Selatan District which include community Selatan . Directorate clean water figures and District General of New supply, toilet health clinic . Health and Renewable healthy house, employees Service Energy and Energy and solid waste regarding Office of Conservation management. environmental Solok (EBTKE) disease Selatan pattern. District, . Governments of Nagari, KAN Alam Pauh Duo, and Pauh Duo Nan Batigo.

C. Operation Stage

1. Changes in air . Air quality . Production well and . Ambient air . In Once every SEML . Environmental . Environmental quality from fugitive injection well drilling, measurements residential six months Service Service Office of emissions and production well testing, with TSP are located

PT Supreme Energy Muara Laboh 782 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

standards dispersion from cooling ambient air project’s operation Solok Selatan District pursuant to tower stack during using high access road, stage. District. . Energy and Government operation of PLTP, volume . H2S gas in . Energy and Mineral Resources Regulation No. . Commissioning, sampler, ambient air Mineral Service Office of 41 of 1999 (TSP . Turbine and condensate . Data analysis at distances: Resources Solok Selatan ambient operation. using SNI 19- - PLTP fence Service District. applicable 7119.3-2005 Office of . Directorate - 300 m from standard < 230 method Solok Selatan General of New 3 PLTP fence µg/Nm ), District. . H2S gas data and Renewable . Emission and measurement Energy and Energy gas from in ambient Conservation cooling tower air (EBTKE) stack during

operation of PLTP,

. H2S gas emission meets the ]standards pursuant to Minister of Environment Regulation No. 21 of 2008 on

standard of H2S emission (< 35 mg/Nm3), . Odor level

meets the H2S applicable

PT Supreme Energy Muara Laboh 783 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

of 1996 ( H2S odor level standard < 28 µg/Nm3).

2. Changes in noise . Noise levels . Production well and . Noise level . Noise level Once every SEML . Environmental . Environmental level meet the injection well drilling, measurement measurement six month Service Service Office of standards for and production well using sound in during the Office of Solok Selatan residential testing, level residential operation Solok Selatan District area < 55 dB(A) . Commissioning, meter, area stage District. . Energy and and industrial located in . Turbine and condensate . Data . Energy and Mineral Resources area <70 dB(A) the operation. analysis in Mineral Service Office of according to accordance project’s Resources Solok Selatan Minister of with road Service District. Environment access. Minister of Office of . Directorate Decision No. 48 Environment . Noise level Solok Selatan General of New of 1996. al measurement District. and Renewable . For project Regulation s in PLTP Energy and Energy workers, No. 48 of working Conservation Threshold Limit 1996. area and (RBTKE) Values (TLV) the wellpad

for working nearest to environment residential according to area. Circular Letter

of Minister of

PT Supreme Energy Muara Laboh 784 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

PT Supreme Energy Muara Laboh 785 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

3. Changes in surface TSS level in the . Production well and . River TSS . Sediment Once every SEML . Environmenta . Environmental water quality river is under injection well sampling, charge from six months l Service Service Office of control = Liki drilling, and . Sampling of wellpad of during the Office of Solok Selatan River baseline of production well Suspended PLTP project operation Solok District, 4 mg/L, maximum < testing, Residue (TSS) site, stage. Selatan . Energy and Mineral 50 mg/L pursuant . Turbine and condensate then . Inlet and District. Resources Service to Government operation. laboratorium outlet of the . Energy and Office of Solok Regulation No. 82 analysis catchpond, Mineral Selatan District, of 2001 using SNI 06- representing Resources . Directorate 6989.3-2004 sediment that Service General of New and method. can be well Office of Renewable Energy, managed, Solok and Energy . TSS sampling Selatan Conservation.(EBTK from Bangko District. E). Jernih River, Bangko Keruh River, and Liki River at:

- Outfall,

- 20 m upstream of outfall,

- 100 m downstream of outfall,

- 200 m downstream of outfall, representing

PT Supreme Energy Muara Laboh 786 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

4. Disturbance to Changes in aquatic Production well and Data analysis, Rivers near Once every SEML . Environmental . Environmental aquatic biota biota composition injection well drilling, total number of activity six month Service Service Office of production well testing, types, locations Every 6 Office of Solok Selatan well and PLTP operation composition, (Bangko Jenih, (six) Solok Selatan District and maintenance. abundance, and Bangko Keruh, months District . Energy and diversity of and Liki River) during the . Energy and Mineral Resources plankton and operation Mineral Service Office of benthos stage Resources Solok Selatan Service District Office of . Directorate Solok Selatan General of New District and Renewable Energy and Energy Conservation (EBTKE)

5. Job opportunities Number and Labor recruitment . Secondary In the vicinity Once every SEML . Environmental . Environmental proportion of data of site (Pauh six months Service Service Office of local workforce collection Duo Subdistrict during the Office of Solok Selatan absorbed during from HRD of and Sangir operation Solok Selatan District, the operation SEML Subdistrict) stage District, . Energy and stage. . Data analysis . Energy and Mineral Resources performed Mineral Service Office of with Resources Solok Selatan comparative Service District and Office of . Social, Manpower, descriptive Solok Selatan and qualitative District

PT Supreme Energy Muara Laboh 787 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

methods. . Social, Transmigration Labor, and Service Office of Transmigratio Solok Selatan n of Solok District. Selatan . Directorate District. General of New . Governments and Renewable of Nagari and Energy and Energy local KAN Conservation (EBTKE)

6. Increasing business Number and Labor recruitment . Secondary In the vicinity Once every SEML . Environmental . Environmental opportunities proportion of new data of site (Nagari six months Service Service Office of businesses collection Alam Pauh Duo during the Office of Solok Selatan absorbed during from HRD of and Pauh Duo Nan operation Solok Selatan District, the operation SEML Batigo). stage District, . Energy and stage. . Data analysis . Energy and Mineral Resources performed Mineral Service Office of with Resources Solok Selatan comparative Service District and Office of . Social, Manpower, descriptive Solok Selatan and qualitative District Transmigration methods. . Social, Service Office of Manpower, and Solok Selatan Transmigratio District. n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation

PT Supreme Energy Muara Laboh 788 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

7. Changes in Increased Labor recruitment . Secondary In the vicinity Once a year SEML . Environmental . Environmental community income community income data of site (Pauh during the Service Service Office of from labor collection Duo Subdistrict operation Office of Solok Selatan recruitment during from HRD of and Sangir stage Solok Selatan District, the operation SEML Subdistrict) District, . Energy and stage. . Data analysis . Energy and Mineral Resources performed Mineral Service Office of with Resources Solok Selatan comparative Service District and Office of . Social, Manpower, descriptive Solok Selatan and qualitative District Transmigration methods. . Social, Service Office of Manpower, and Solok Selatan Transmigratio District. n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation of Nagari and (EBTKE) local KAN.

PT Supreme Energy Muara Laboh 789 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

8. Changes in social Changes in social Labor recruitment . Data recorded In the vicinity Once a year SEML . Environmental . Environmental values and norms values and norms, from formal of site during the Service Service Office of and also local and informal (Kecamatan Pauh operation Office of Solok Selatan traditions meetings with Duo and stage Solok Selatan District,

community Kecamatan District, . Energy and figure and Sangari) . Energy and Mineral Resources members, Mineral Service Office of . Data analysis Resources Solok Selatan performed with Service District

comparative Office of . Social, Manpower, and Solok Selatan and descriptive District Transmigration qualitative . Social, Service Office of methods. Manpower, and Solok Selatan Transmigratio District. n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation of Nagari and (EBTKE) local KAN

9. Changes in . Decreased . Labor recruitment, . Data In the vicinity Once a year SEML . Environmental . Environmental community negative . Production well and collection of of site during the Service Service Office of perception perception on injection well community (Kecamatan Pauh operation Office of Solok Selatan land drilling, production perception Duo and stage Solok Selatan District acquisition and well testing, and well . Data analysis Kecamatan District. . Energy and from workforce and PLTP operation and performed with Sangari) . Energy and Mineral Resources recruitment maintenance. comparative Mineral Service Office of

PT Supreme Energy Muara Laboh 790 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

Data Collection No. Indicator/Paramete Monitoring Duration Implementin Supervising Report Receiving Type of Impact Source of Impact Methods and r Locations and Period g Party Agencies Agencies Analysis activity during and Resources Solok Selatan operation descriptive Service District. stage, qualitative Office of . Social, Manpower, . Decreased methods. Solok Selatan and negative District Transmigration perception of . Social, Service Office of production well Manpower, and Solok Selatan and injection Transmigratio District. well drilling, n Service . Directorate production well Office of General of New testing, also Solok Selatan and Renewable well and PLTP District. Energy and Energy operation and . Government of Conservation maintenance. Nagari and (EBTKE) local KAN

10 Disturbance to . Parameter to be Production well and . Interviews In the vicinity Once a year SEML . Environmenta . Environemntal . public monitored is injection well drilling, with project of site during the l Service Agency of Solok health/deterioratio environmental production well testing, head and (Kecamatan Pauh operation Office of Selatan District, n in public health disease types and well and PLTP secondary Duo and stage Solok . Energy and status. that cause operation and maintenance. data Kecamatan Selatan Mineral Resources infection as an collection Sangari) District Service Office of impact of from . Energy and Solok Selatan environment Community Mineral District quality, Health Centre Resources . Health Service (Puskesmas), . Environmental Service Office of Solok sanitation . Interviews Office of Selatan District, facilities, with Solok . Directorate which include community Selatan General of New clean water figure and District

PT Supreme Energy Muara Laboh 791 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

supplies, health clinic . Health and Renewable toilets, healthy employees Service Energy and Energy houses, and regarding Office of Conservation solid waste environmental Solok (EBTKE) management. disease Selatan pattern. District, . Governments of Nagari and local KAN

D. Post Operation Stage

1. Changes in erosion Erosion rate is Rehabilitation/revegetatio Land erosion Areas prone to Once every SEML . Environmental . Environmental and sedimentation under control in n measurement erosion along six months Service Service Office of accordance with using small access road, during the Office of Solok Selatan Decision of square method. well pad, and post Solok Selatan District Director General geothermal power operation District . Energy and for Reforestation plant area. stage . Energy and Mineral Resources and Mineral Service Office of Rehabilitation, Resources Solok Selatan the Minister of Service District Forestry,No. Office of . Directorate 041/Kpts/V/1998 Solok Selatan General of New (<15 ton/ha/of). District and Renewable Energy and Energy Conservation (EBTKE)

2. Changes in surface Sediment charge Rehabilitation/revegetatio Sediment charge . Sediment Once every SEML . Environmental . Environmental water runoff rates that will be n sampling in charge of six months Service Service Office of

PT Supreme Energy Muara Laboh 792 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

Data Collection No. Indicator/Paramete Monitoring Duration Implementin Supervising Report Receiving Type of Impact Source of Impact Methods and r Locations and Period g Party Agencies Agencies Analysis discharged into inlet and outlet wellpad of during the Office of Solok Selatan river is under of the catch PLTP project post Solok Selatan District control according pond, and site, operation District . Energy and to Government laboratory . Inlet and stage . Energy and Mineral Resources Regulation No. 82 analysis for outlet of Mineral Service Office of of 2001 (<50 Total Suspended catch pond, Resources Solok Selatan mg/L). Solids (TSS) representing Service District using SNI 06- sediment that Office of . Directorate 6989.3-2004 can be well Solok Selatan General of New method, as well managed. District and Renewable as determining Energy and Energy the Conservation effectiveness of (EBTKE) the catch pond.

3. Changes in surface TSS levels in Rehabilitation/revegetatio . TSS residue . TSS sampling Once every SEML . Environmental . Environmental water quality river are under n sampling and from Bangko six months Service Service Office of control = TSS then it is Jernih River, during the Office of Solok Selatan baseline for Liki analized Bangko Keruh post Solok Selatan District River is 4 mg/L using SNI 06- River, and operation District. . Energy and and maximum < 50 6989.3-2004 Liki River stage . Energy and Mineral Resources mg/.L according to method. at: Mineral Service Office of PP No. 82 of 2001 - Outfall Resources Solok Selatan

- 20 m Service District. upstream of Office of . Directorate outfall, Solok Selatan General of New District. - 100 m and Renewable downstream Energy and Energy of outfall, Conservation.(EBT KE) - 200 m downstream

PT Supreme Energy Muara Laboh 793 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

4. Disturbance to the Re-vegetated area, Rehabilitation/revegetatio . Data Monitoring at Once every SEML  Environemntal . Environmental flora and fauna type of planted n collection all six months Agency of Service Office of flora/vegetation, method rehabilitated/re during the Solok Selatan Solok Selatan and success rate through -vegetated post District District of re-vegetated inventory/dir areas. operation  Forestry . Forestry Service plant growth, ect stage Service Office Office of Solok presence of observation of Solok Selatan District, protected flora of the area Selatan . Energy and refers to to be District, Mineral Resources Government revegetated.  Energy and Service Office of Regulation No. 07 . Data analysis Mineral Solok Selatan of 1999, and through Resources District, diversity index. vegetation Service Office . Directorate analysis. of Solok General of New Selatan and Renewable District. Energy, and Energy Conservation.

5. Disturbance to Changes in aquatic Rehabilitation/revegetatio Data analysis of Rivers near Once every SEML . Environmental . Environmental aquatic biota biota composition. n number of types, locations six months Service Service Office of composition, (Bangko Jernih during the Office of Solok Selatan abundance, and River, Bangko post Solok Selatan District diversity of Keruh River, and operation District . Energy and plankton and Liki River) stage . Energy and Mineral Resources

PT Supreme Energy Muara Laboh 794 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

Data Collection No. Indicator/Paramete Monitoring Duration Implementin Supervising Report Receiving Type of Impact Source of Impact Methods and r Locations and Period g Party Agencies Agencies Analysis benthos Mineral Service Office of Resources Solok Selatan Service District Office of . Directorate Solok Selatan General of New District and Renewable Energy and Energy Conservation (EBTKE)

6. Decrease in Number and Termination of employment . Secondary In the vicinity Once every SEML . Environmental . Environemental employment proportion of data of site six months Service Agency of Solok opportunities unemployment as a collection (Kecamatan Pauh during the Office of Selatan District,

result of from HRD of Duo and post Solok Selatan . Energy and termination of SEML Kecamatan operation District, Mineral Resources employment in . Data analysis Sangari) stage . Energy and Service Office of project activity. performed Mineral Solok Selatan with Resources District comparative Service . Social, Manpower, and Office of and descriptive Solok Selatan Transmigration of qualitative District Solok Selatan methods. . Social, District.

Manpower, and . Directorate Transmigratio General of New n Service and Renewable Office of Energy and Energy Solok Selatan Conservation District. (EBTKE) . Governments of Nagari

PT Supreme Energy Muara Laboh 795 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

7. Decreas e in Decreasing number Termination of Employment . Secondary In the vicinity Once in six SEML . Environmental . Environmental business and proportion of data of site months Service Service Office of opportunies businesses during collection (Kecamatan Pauh during the Office of Solok Selatan the post operation from HRD of Duo and post Solok Selatan District,

stage. SEML Kecamatan operation District, . Energy and . Data analysis Sangari) stage . Energy and Mineral Resources performed Mineral Service Office of with Resources Solok Selatan comparative Service District and Office of . Social, Manpower, descriptive Solok Selatan and qualitative District Transmigration methods. . Social, Service Office of Manpower, and Solok Selatan Transmigratio District.

n Service . Directorate Office of General of New Solok Selatan and Renewable District. Energy and Energy . Governments Conservation of Nagari and (EBTKE) local KAN.

8. Changes in Decreased Termination of employment . Secondary In the vicinity Once a year SEML . Environmental . Environmental community income community income data of site during the Service Service Office of due to termination collection (Kecamatan Pauh post Office of Solok Selatan of employment from HRD of Duo and operation Solok Selatan

PT Supreme Energy Muara Laboh 796 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

Data Collection No. Indicator/Paramete Monitoring Duration Implementin Supervising Report Receiving Type of Impact Source of Impact Methods and r Locations and Period g Party Agencies Agencies Analysis during the post SEML Kecamatan stage District, District, operation stage. . Data analysis Sangari) . Energy and . Energy and performed Mineral Mineral Resources with Resources Service Office of comparative Service Solok Selatan and Office of District

descriptive Solok Selatan . Social, Manpower, qualitative District and methods. . Social, Transmigration Manpower, and Service Office of Transmigratio Solok Selatan n Service District.

Office of . Directorate Solok Selatan General of New District. and Renewable . Governments Energy and Energy of Nagari and Conservation local KAN (EBTKE)

9. Changes in . Decreased . Closure of production . Secondary In the vicinity Once in six SEML . Environmental . Environmental community negative well, injection well, data of site (Nagari months Service Service Office of perception perception to demobilization of collection Alam Pauh Duo during the Office of Solok Selatan the closure of pipeline and supporting from HRD of and Pauh Duo Nan post Solok Selatan District,

production facilities, also PLTP SEML Batigo) operation District, . Energy and well, injection demobilization. . Data stage . Energy and Mineral Resources well, pipeline . Termination of analysis Mineral Service Office of demobilization employment performed Resources Solok Selatan and with Service District demobilization comparative Office of . Social, Manpower, of supporting and Solok Selatan and

PT Supreme Energy Muara Laboh 797 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

PLTP at post qualitative . Social, Service Office of operation methods. Manpower, and Solok Selatan stage, Transmigratio District. . Decreased n Service . Directorate negative Office of General of New perceptions of Solok Selatan and Renewable termination of District. Energy and Energy employment . Governments Conservation during the post of Nagari and (EBTKE) operation local KAN stage.

E. Monitoring of Other Impacts

1. . Non industrial . Comply with . Domstic solid waste, . Measuring the SEML . Environmental . Environmental . Municipal During Solid waste: Minister of . Domestic waste water amount of Service Service Office of solid waste constructio solid waste type Energy and from Waste Water solid waste Office of Solok Selatan landfill, n stage and quantities Mineral Treatment Plant (WWTP), generated by Solok Selatan District. until collected, Resources counting the District. . Energy and . Domestic operation transported, Regulation No. numbers of . Energy and Mineral Resources Waste Water stage: disposed at 045 of 2006 trucks Treatment Mineral Service Office of landfill and regarding carrying Plant, . Solid Resources Solok Selatan recycled, Drilling Mud solid waste waste: Service District. Requirement and to dispose at . Well location . Domestic waste every Office of . Directorate water: Management, landfill, (sump pits Timing Solok Selatan General of New Biochemical . Comply with . Collecting, and mud waste solid District. and Renewable disposal). Oxygen Demand, requirements of preparing, waste is . Department of Energy and Energy Chemical Oxygen applicable and analyzing disposed Social, Conservation Demand, Total hazardous and water sample to Labor, and (EBTKE) Suspended Solids toxic waste from all landfill Transmigratio and pH; management domestic n of Solok

PT Supreme Energy Muara Laboh 798 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

. Hazardous and regulations waste water , Selatan toxic waste (Government treatment District. . WWTP: types and Regulation No. plant outlets once quantitities, 18 of 1999 and according to every . Spills: spill Government PT SEML six types and Regulation No. protocol months quantities 85 of 1999). based on SNI, (twice a spilled. also conduct year) in situ and, measurement of pH, . At the conductivity, location and of temperature, hazardou . Monitoring s and the toxic implementatio waste n of Standard collecti Operating on. Once Procedures every (SOP) to six prevent oil months spills, (twice a . Monitoring year) the implementatio n of Standard Operating Procedures (SOP) of

PT Supreme Energy Muara Laboh 799 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Environmental Impact to be Monitored Form of Environmental Monitoring Environmental Monitoring Institution

. Conducting toxicity characteristi c leaching procedure tests for drilling mud, mud waste, and drilling dust.

PT Supreme Energy Muara Laboh 800

Map VI-1 Locations for Environmental Management and Monitoring during Pre-Construction Stage

PT Supreme Energy Muara Laboh 801 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Map VI-2 Locations for Environmental Management and Monitoring during Construction Stage

PT Supreme Energy Muara Laboh 802 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

PT Supreme Energy Muara Laboh 803 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

PT Supreme Energy Muara Laboh 804 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

Map VI-3 Locations for Environmental Management and Monitoring during Operation Stage

PT Supreme Energy Muara Laboh 805

No. ML-RSH-LTR.002.I.2015 Jakarta, January 5, 2015

STATEMENT LETTER

The undersigned:

Person in : Priyandaru Effendi

Charge

Position : VP Relations and SHE

Office Address : Equity Tower, 18th Floor, Sudirman

Central Business District (SCBD)

Lot. 9, Jalan Jend. Sudirman Kav.

52-53 Jakarta 12190, Indonesia

Telephone : (021) 5155 222

Number

Faximile : (021) 5155 333

Number

In this matter acting as the Proponent of Geothermal

Development Activities for 250 MW Muara Laboh Geothermal

Power Plant in Solok Selatan District, West Sumatra

Province, hereby declare that:

PT Supreme Energy Muara Laboh 806 RKL-RPL Geothermal Development for Muara Laboh Power Plant 250 MW

 We will fulfill the commitment of management and

environmental monitoring as specified in these

Environmental Impact Analysis (ANDAL), Environmental

Management Plan (RKL) and Environmental Monitoring

Plan (RPL) documents,

 We are willing to take responsibility in accordance

with the prevailing regulations, if we are proven to

have failed to perform environmental management and

monitoring in a proper manner.

PT Supreme Energy Muara Laboh 807