Draft Environmental Impact Assessment Report (ANDAL) Project Number: 50156-001 October 2013 INO: Muara Laboh Geothermal Power Project Prepared by PT Greencap NAA Indonesia for PT Supreme Energy Muara Laboh (PT SEML) This environmental impact assessment report 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. In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area. Environmental Impact Assessment (ANDAL) Geothermal Development Activities for 250 MW Muara Laboh Geothermal Power Plant in South Solok Regency, West Sumatra Province October, 2013 Environmental Impact Assessment (ANDAL) Geothermal Development Activities for the 250 MW Muara Laboh Geothermal Power Plant (PLTP) in South Solok Regency, West Sumatra Province October, 2013 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". The planned Geothermal Development Activities generally include the development and operation of geothermal power plant and the construction of supporting facilities. It is expected that the planned activities will give benefits in supporting the policy of Indonesian Government on energy diversification. However, these planned activities potentially create environmental impacts on the physical-chemical, biological, socioeconomic and cultural components as well as on the public health. As follow up action to the Decision of the Chairman of AMDAL Assessment Commission of South Solok Regency Government Number: 660/162/KPA/VI-2013 on June 27, 2013 on the Approval of Terms of Reference of Environmental Impact Assessment (KA-ANDAL) of the Planned Geothermal Development Activities for the 250 MW Muara Laboh Geothermal Power Plant (PLTP) in South Solok Regency, thus PT SEML composes the Environmental Impact Assessment (ANDAL), Environmental Management Plan (RKL), and Environmental Monitoring Plan (RPL) documents by referring to the Regulations of Minister of Environment No. 16 of 2012 on Guidelines for Composing Environmental Documents. PT SEML is always committed to the Occupational Safety and Health as well as Security management programs. It is expected that these activities will give benefits for the stakeholders, especially: local community, regional government, employees, and shareholders. PT SEML would like thank all of the parties who have supported and worked hard to compose this document. Hopefully, this AMDAL study will be a good step for the development of this project. Muara Laboh, September 2013 PT Supreme Energy Muara Laboh TABLE OF CONTENTS PREFACE ..............................................................................................................................I TABLE OF CONTENTS ................................................................................................................II LIST OF TABLES ........................................................................................................................ VI LIST OF FIGURES ...................................................................................................................... IX LIST OF MAPS XI LIST OF TERMS/ABBREVIATION ............................................................................................ XII CHAPTER I INTRODUCTION .............................................................................................. I-1 1.1 BACKGROUND ................................................................................................................ I-1 1.2 DESCRIPTION OF PLANNED GEOTHERMAL DEVELOPMENT ACTIVITIES FOR 250 MW MUARA LABOH GEOTHERMAL POWER PLANT ............................................ I-2 1.2.1 Stages of Project .................................................................................................. I-4 1.2.2 Schedule of Proposed Project ............................................................................ I-29 1.3 SCOPING PROCESS ..................................................................................................... I-29 1.3.1 Identification of Potential Impacts ....................................................................... I-30 1.3.2 Evaluation of Potential Impacts .......................................................................... I-33 1.3.3 Hypothetically Significant Impacts ...................................................................... I-50 1.4 STUDY AREA SCOPING AND STUDY TIMELINES ..................................................... I-51 1.4.1 Study Area Boundaries ....................................................................................... I-51 1.4.2 Study Timelines .................................................................................................. I-52 CHAPTER II ENVIRONMENTAL BASELINE ...................................................................... II-1 2.1 GEOPHYSICAL-CHEMICAL COMPONENTS ................................................................ II-1 2.1.1 Climate ................................................................................................................. II-1 2.1.2 Air Quality ............................................................................................................ II-3 2.1.3 Noise .................................................................................................................... II-6 2.1.4 Physiography and Geology ................................................................................. II-7 2.1.5 Geotechnical and Earthquakes ......................................................................... II-10 2.1.6 Hydrogeology .................................................................................................... II-14 2.1.7 Hydrology........................................................................................................... II-16 2.1.8 Water Quality ..................................................................................................... II-19 2.1.9 Soil Quality ........................................................................................................ II-24 2.2 BIOLOGICAL COMPONENTS ...................................................................................... II-27 2.2.1 Terrestrial Flora and Fauna ............................................................................... II-27 2.2.2 Aquatic Biota ..................................................................................................... II-37 2.3 SOCIO-ECONOMIC, CULTURE, AND HEALTH OF THE COMMUNITIES ................. II-45 2.3.1 Socio-economic ................................................................................................. II-45 PT Supreme Energy Muara Laboh ii ANDAL Geothermal Development Activities for the 250 MW Muara Laboh Geothermal Power Plant 2.3.2 Socioculture ....................................................................................................... II-53 2.3.3 Public Health ..................................................................................................... II-61 2.3.4 Transportation ................................................................................................... II-66 2.4 OTHER ACTIVITIES IN VICINITY OF PLANNED ACTIVITIES .................................... II-70 CHAPTER III PREDICTED SIGNIFICANT IMPACTS ......................................................... III-1 3.1 PRE-CONSTRUCTION STAGE ..................................................................................... III-3 3.1.1 Socio-economic and Culture Components ......................................................... III-3 3.2 CONSTRUCTION STAGE .............................................................................................. III-4 3.2.1 Physical-Chemical Components ........................................................................ III-4 3.2.2 Biology Components ........................................................................................ III-19 3.2.3 Socio-Economic and Culture Components ...................................................... III-22 3.2.4 Public Health Components ............................................................................... III-26 3.3 OPERATION STAGE .................................................................................................... III-27 3.3.1 Physical-Chemical Components ...................................................................... III-27 3.3.2 Biology Components ........................................................................................ III-51 3.3.3 Socio-Economic and Culture Components ...................................................... III-52 3.3.4 Public Health Components ............................................................................... III-55 3.4 POST OPERATION STAGE ......................................................................................... III-56 3.4.1 Physical-Chemical Components .....................................................................