Approval Amendment Environmental Protection and Enhancement Act Approval 147028-01-00

Submitted to:

Alberta Environment & Sustainable Resource Development

Prepared for:

Elmworth Generating Station PO Box 5203, Alberta Ave Spruce Grove, AB T7X 3A3

Prepared by:

Amberg Corp.

Environmental & Regulatory Consultants 840, 510 – 5th Street SW Calgary, Alberta T2P 3S2 Tel: (403) 247 - 3088

November 29, 2013

ADI104000 Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

APPLICATION

This approval amendment application was prepared in accordance with the Interim Approvals and Registrations Procedure Regulation, AR 113/93 (Consolidated to AR 251/2001) and Alberta Environment & Sustainable Resource Development’s (AESRD) “Guide to Content of Industrial Approval Applications”, August 1,2013.

As part of Northstone Power Corp’s (Northstone) Approval 147028-01-00 under the “Environmental Protection and Enhancement Act R.S.A. 2000, c.E-12, as amended, Northstone is responsible for ensuring that it does not exceed outlined emission limits and the Alberta Ambient Air Objectives. As such, Northstone has retained Amberg: Environmental & Regulatory Consultants (Amberg) to prepare this amendment application including an air quality assessment.

Changes requested in this amendment application are related to Approval clauses 4.1. 2, 4.1.3, 4.1.6, and 4.1.8. Details pertaining to the particulars of the requested changes are as follows.

4.1.2 (a) Four 3163 Cooper Bessemer LSV 16 Gen Set stacks identified in the application by the designation G5, G6, G7, and G8 plus one Wartsila 20V34sg Gen-Set stack designated as G9.

4.1.3 Table 4.1-B Stack Heights. Reduce number of Cooper Bessemer LSV 16 Gen-Sets to four and add one Wartsila 20V34SG 9300 kW Gen-Set with stack height of 12 m.

4.1.6 Table 4.1-C Limits Wartsila 20V34SG (G9) NOx 12.6 kg/hr

4.1.8 Add Wartsila 20V34SG Gen-Set as G9.

Amberg Environmental & Regulatory Consultants i Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

TABLE OF CONTENTS

APPLICATION ...... i TABLE OF CONTENTS ...... ii 1.0 APPLICANT IDENTIFICATION ...... 1 1.1 Company Name and Address ...... 1 1.2 Facility Address ...... 1 1.3 Applicant Contact Information ...... 1 2.0 FACILITY IDENTIFICATION ...... 2 2.1 Legal Land Description ...... 2 2.2 Geographical Description ...... 2 2.3 Facility Description and Activities ...... 2 3.0 PROJECT BACKGROUND ...... 5 3.1 Regulatory ...... 5 4.0 PROPOSED CHANGES ...... 5 5.0 STATE OF THE ENVIRONMENT ...... 6 6.0 DESIGN AND OPERATION ...... 6 7.0 WASTEWATER AND RUNOFF TREATMENT AND CONTROL ...... 6 8.0 AIR TREATMENT AND CONTROL ...... 6 9.0 DECOMMISSIONING & RECLAMATION PLAN ...... 6 10.0 EMERGENCY RESPONSE ...... 6 APPENDIX 1 APPROVALS AND AMENDMENTS ...... 7 APPENDIX 2 AIR QUALITY ASSESSMENT ...... 24

Amberg Environmental & Regulatory Consultants ii

Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

2.0 FACILITY IDENTIFICATION 2.1 Legal Land Description

The facility is located at Lot 1, Plan 0122645 in LSD NE-8-70-11-W6M, approximately two kilometers southwest of Elmworth, and 60 kilometers west of Grande Prairie, Alberta. See Figure 2.1.

2.2 Geographical Description

The facility is located on gently rolling grassland terrain with some ridges and plateaus in a predominantly agricultural area in the Western Alberta Plains. A regional map is provided in Figure 2.2.

2.3 Facility Description and Activities

According to the “Activities Designation Regulation (276/2003)” the facility is classified as a “thermal electric power plant”. The facility operates as a merchant peaking plant and provides electricity to the Alberta Power Pool.

The facility is comprised of a building, approximately 1080 m2 in size, which houses an office and four Cooper-Bessemer LSV-16 reciprocating engines with generation units each capable of producing 3.163 MW of electricity. Also, a small boiler is located in the main building and a natural gas line heater is located northeast of the main building. All equipment is fueled by natural gas. South of the main building is the facility’s switchyard. The facility site occupies an area of approximately 4 ha.

The facility employs three (3) full time operations personnel.

Amberg Environmental & Regulatory Consultants 2 Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

Figure 2.1 Facility Location

Elmworth Power Plant

Conoco Phillips Gas Plant

Amberg Environmental & Regulatory Consultants 3 Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

Figure 2.2 Regional Setting

Amberg Environmental & Regulatory Consultants 4 Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

3.0 PROJECT BACKGROUND 3.1 Regulatory

The Elmworth Thermal Power Plant was constructed and began operations in 2001. The plant currently generates 9.3 MW of electricity which is provided to the Alberta Power Pool. The facility operates under Approval Number 147028-01-00 as granted under the “Environmental Protection Act” (R.S.A. 2000, c- E12, as amended). Approval 147028-01-00 was issued on April 10, 2012 authorizing the addition of a fifth Cooper-Bessemer LSV-16 turbine generator rated at 3.163 MW

An application to the Alberta Utilities Commission will be issued under separate cover.

4.0 PROPOSED CHANGES

As outlined in Approval 147028-01-00, intentions were to add a fifth Cooper-Bessemer LSV-16 engine and generator. Recent changes to facility development strategy have focused on the installation of a Wartsila 20V34SG reciprocating engine and generator combination with the potential to generate 9.3 MW of electrical energy. Engine features include four stroke lean burn operation with turbocharger and the engine has an embedded control system to manage the combustion process in each cylinder.

Proposed amendments to the Approval include:

4.1.2 (a) Four 3163 Cooper Bessemer LSV 16 Gen Set stacks identified in the application by the designation G5, G6, G7, and G8 plus one Wartsila 20V34sg Gen-Set stack designated as G9.

4.1.3 Table 4.1-B Stack Heights. Reduce number of Cooper Bessemer LSV 16 Gen-Sets to four and add one Wartsila 20V34SG 9300 kW Gen-Set with stack height of 12 m.

4.1.6 Table 4.1-C Limits Wartsila 20V34SG (G9) NOx 12.6 kg/hr

4.1.8 Add Wartsila 20V34SG Gen-Set as G9.

There will be no other changes to unit operations at the facility and no other equipment will be installed with the exception of a small 16 by 20 foot building to house the new engine control equipment.

Notification of the amendment application will be provided in local media as per the direction of Alberta Environment & Sustainable Resource Development.

Amberg Environmental & Regulatory Consultants 5 Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

5.0 STATE OF THE ENVIRONMENT No changes to the state of the environment are anticipated. Environmental impacts related to the addition of the fifth Cooper-Bessemer Gen-Set were evaluated in the application leading to Approval 147028-01- 00. The substitution of the Wartsila 20V34SG will have a lower emissions profile resulting in improved ambient air quality. Details are provided in the Ambient Air Quality Assessment shown in Appendix 2.

Engine cooling will be achieved by a closed loop glycol /water system with aerial coolers and there will be no wastewater effluent from the facility.

There will be no industrial run-off from the facility. Equipment is housed in the main plant building which has been designed with a 75 mm curbed secondary containment, including doorways. The building has impermeable floors which are sloped towards a collection sump. Floor drains are pumped to an outside slop tank. Outside the building, all liquid storage has secondary containment and is in accordance with Alberta Energy Regulator Guide 55.

6.0 DESIGN AND OPERATION The new engine and generator will be housed in the main facility building and a small 16 by 20 foot building will be added to the southeast of the main building to house the engine control equipment.

7.0 WASTEWATER AND RUNOFF TREATMENT AND CONTROL There will be no changes to current water handling practices resulting from this project.

8.0 AIR TREATMENT AND CONTROL An air quality assessment is provided in Appendix 2 and shows the at the Alberta Ambient Air Quality Objectives for nitrogen oxides are met.

9.0 DECOMMISSIONING & RECLAMATION PLAN

The Facility will be in operation for the foreseeable future and no changes to anticipated decommissioning and reclamation plans are envisaged. At the appropriate time, all applicable requirements for decommissioning and reclamation will be met.

10.0 EMERGENCY RESPONSE Emergency procedures related to operation and safe shut down of the existing turbines and related equipment have been developed and implemented. Procedures are primarily directed at the safe operation of equipment as the handling of materials and substances, which could have adverse impacts on the environment is minimal.

Amberg Environmental & Regulatory Consultants 6 Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

APPENDIX 1 APPROVALS AND AMENDMENTS

Amberg Environmental & Regulatory Consultants 7 Government of Alberta _ Environment and Water

APPROVAL

PROVINCE OF ALBERTA

ENWRONMENTALPROTECnONANDENHANCEMENT AC T R.S.A. 2000, c.E-12, as amended.

147028-01-00

APPR ...... OVAL NO.:

003-147028

PP AT .. A LIC ION NO.: ......

April jo ,2012

EFFECTIVE DATE: ......

March 31,2022 EXPIRY DATE:

Northstone Power Corp. APPROVAL HOLDER:

construction, operation and reclamation of the ACTIVITY:

Elmworth Thermal Electric Power Plant

is subject to the attached terms and conditions.

Desi nated Director ...... ct under . l1/for g the A : ...... G.as.ev='

April 10 ,2012

Date Signed: ...... APPROVAL NO. 147028-01-00 Page 1 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

PART 1: DEFINITIONS

SECTION 1.1: DEFINITIONS

1.1.1 All definitions from the Act and the regulations apply except where expressly defined in this approval.

1.1.2 In all PARTS of this approval:

(a) "Act" means the Environmental Protection and Enhancement Act, R.S.A. 2000, c.E-12, as amended;

(b) "air effluent stream" means any substance in a gaseous medium released by or from a plant;

(c) "application" means the written submissions from the approval holder to the Director in respect of application number 003-147028 and any subsequent applications where amendments are issued for this approval;

(d) "CEMS Code" means the Continuous Emission Monitoring System (CEMS) Code, Alberta Environmental Protection, Pub.No.Ref: 107, May 1998, as amended;

(e) "container" means any portable device in which a substance is kept, including but not limited to drums, barrels and pails which have a capacity greater than 18 litres but less than 210 litres;

(f) "day", when referring to sampling, means any sampling period of 24 consecutive hours;

(g) "decommissioning" means the dismantling and decontamination of a plant undertaken subsequent to the termination or abandonment of any activity or any part of any activity regulated under the Act;

(h) "decontamination" means the treatment or removal of substances from the plant and affected lands;

(i) "Director" means an employee of the Government of Alberta designated as a Director under the Act; APPROVAL NO. 147028-01-00 Page 2 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

U) "dismantling" means the removal of buildings, structures, process and pollution abatement equipment, vessels, storage facilities, material handling facilities, railways, roadways, pipelines and any other installations that are being or have been used or held for or in connection with the plant;

(k) "domestic wastewater" means wastewater that is the composite of liquid and water-carried wastes associated with the use of water for drinking, cooking, cleaning, washing, hygiene, sanitation or other domestic purposes, together with any infiltration and inflow wastewater, that is released into a wastewater collection system;

(I) "fugitive emissions" means emissions of substances to the atmosphere other than ozone depleting substances, originating from a plant source other than a flue, vent, or stack but does not include sources which may occur due to breaks or ruptures in process equipment;

(m) "ISO/IEC 17025" means the international standard, developed and published by International Organization for Standardization (ISO), specifying management and technical requirements for laboratories;

(n) "industrial runoff' means precipitation that falls on or traverses the plant developed area;

(0) "industrial wastewater" means the composite of liquid wastes and water-carried wastes, any portion of which results from any industrial process carried on at the plant;

(p) "local environmental authority" means the Department of Environment and Water, in the Province of Alberta, or the agency that has the equivalent responsibilities for any jurisdiction outside the Province;

(q) "manual stack survey" means a survey conducted in accordance with the Alberta Stack Sampling Code, Alberta Environment, 1995, as amended;

(r) "month" means calendar month; APPROVAL NO. 147028-01-00 Page 3 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

(s) "plant" means all buildings, structures, process and pollution abatement equipment, vessels, storage facilities, material handling facilities, roadways, railways, pipelines and other installations, and includes the land, located on the LSD 9 of Section 8, Township 70, Range 11, West of the 6th Meridian that is being or has been used or held for or in connection with the Elmworth Thermal Electric Power Plant;

(t) "plant developed area" means the areas of the plant used for the storage, treatment, processing, transport, or handling of raw material, intermediate product, by-product, finished product, process chemicals, or waste material;

(u) "regulations" means the regulations enacted pursuant to the Act, as amended;

(v) "soil" means mineral or organic earthen materials that can, have, or are being altered by weathering, biological processes, or human activity;

(w) "tank" means a stationary device, designed to contain an accumulation of a substance, which is constructed primarily of non-earthen materials that provide structural support including wood, concrete, steel, and plastic;

(x) "week" means any consecutive 7-day period; and

(y) "year" means calendar year, unless otherwise specified.

PART 2: GENERAL

SECTION 2.1: REPORTING

2.1.1 The approval holder shall immediately report to the Director by telephone any contravention of the terms and conditions of this approval at 780-422-4505.

2.1.2 The approval holder shall submit a written report to the Director within 7 days of the reporting pursuant to 2.1.1.

2.1.3 The approval holder shall immediately notify the Director in writing if any of the following events occurs:

(a) the approval holder is served with a petition into bankruptcy; APPROVAL NO. 147028-01-00 Page 4 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

(b) the approval holder files an assignment in bankruptcy or Notice of Intent to make a proposal;

(c) a receiver or receiver-manager is appointed;

(d) an application for protection from creditors is filed for the benefit of the approval holder under any creditor protection legislation; or

(e) any of the assets which are the subject matter of this approval are seized for any reason.

2.1.4 If the approval holder monitors for any substances or parameters which are the subject of operational limits as set out in this approval more frequently than is required and uses procedures authorized in this approval, then the approval holder shall provide the results of such monitoring as an addendum to the reports required by this approval.

2.1.5 The approval holder shall submit all monthly reports required by this approval to be compiled or submitted to the Director on or before the end of the month following the month in which the information was collected, unless otherwise specified in this approval.

2.1.6 The approval holder shall submit all annual reports required by this approval to be compiled or submitted to the Director on or before March 31 of the year following the year in which the information was collected, unless otherwise specified in this approval.

SECTION 2.2: RECORD KEEPING

2.2.1 The approval holder shall:

(a) record; and

(b) retain APPROVAL NO. 147028-01 -00 Page 5 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

all the following information in respect of any sampling conducted or analyses performed in accordance with this approval for a minimum of ten years, unless otherwise authorized in writing by the Director:

(i) the place, date and time of sampling,

(ii) the dates the analyses were performed,

(iii) the analytical techniques, methods or procedures used in the analyses,

(iv) the names of the persons who collected and analysed each sample, and

(v) the results of the analyses.

SECTION 2.3: ANALYTICAL REQUIREMENTS

2.3.1 With respect to any sample required to be taken pursuant to this approval, the approval holder shall ensure that:

(a) collection;

(b) preservation;

(c) storage;

(d) handling; and

(e) analysis

shall be conducted in accordance with the following unless otherwise authorized in writing by the Director:

(i) for air:

(A) the Alberta Stack Sampling Code, Alberta Environment, 1995, as amended, APPROVAL NO. 147028-01-00 Page 6 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

(8) the Methods Manual for Chemical Analysis of Atmospheric Pollutants, Alberta Environment, 1993, as amended,

(C) the Air Monitoring Directive, Alberta Environment, 1989, as amended, and

(D) the CEMS Code;

(ii) for industrial wastewater, and industrial runoff:

(A) the Standard Methods for the Examination of Water and Wastewater, published jOintly by the American Public Health Association, American Water Works Association, and the Water Environment Federation, 1998, as amended;

(iii) for waste:

(A) the Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, USEPA, SW-846, September 1986, as amended,

(8) the Methods Manual for Chemical Analysis of Water and Wastes, Alberta Environmental Centre, Vegreville, Alberta, 1996, AECV96-M1 as amended,

(C) the Toxicity Characteristic Leaching Procedure (TCLP) USEPA Regulation 40 CFR261, Appendix II, Method No. 1311, as amended, or

(D) the Standard Methods for the Examination of Water and Wastewater, American Public Health Association, American Water Works Association, and the Water Environment Federation, 2010, as amended.

2.3.2 The approval holder shall analyse all samples that are required to be obtained by this approval in a laboratory accredited pursuant to ISO/IEC 17025, as amended, for the specific parameter(s) to be analysed, unless otherwise authorized in writing by the Director. APPROVAL NO. 147028-01-00 Page 7 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

2.3.3 The term sample used in 2.3.2 does not include samples directed to continuous monitoring equipment, unless specifically required in writing by the Director.

2.3.4 The approval holder shall comply with the terms and conditions of any written authorization issued by the Director under 2.3.2.

SECTION 2.4: OTHER

2.4.1 The terms and conditions of this approval are severable. If any term or condition of this approval or the application of any term or condition is held invalid, the application of such term or condition to other circumstances and the remainder of this approval shall not be affected thereby.

2.4.2 Environmental Protection and Enhancement Act Approval No. 147028-00-00 is cancelled.

2.4.3 All tanks shall conform to the Guidelines for Secondary Containment for Above Ground Storage Tanks, Alberta Environmental Protection, 1997, as amended, unless otherwise authorized in writing by the Director.

2.4.4 All above ground storage tanks containing liquid hydrocarbons or organic compounds shall conform to the Environmental Guidelines for Controlling Emissions of Volatile Organic Compounds from Aboveground Storage Tanks, Canadian Council of Ministers of the Environment, PN 1180, 1995, as amended.

PART 3: CONSTRUCTION

Not used at this time.

PART 4: OPERATIONS, LIMITS, MONITORING AND REPORTING

SECTION 4.1: AIR

OPERATIONS

4.1.1 The approval holder shall not release any air effluent streams to the atmosphere except as authorized by this approval. APPROVAL NO. 147028-01-00 Page 8 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

4.1.2 The approval holder shall only release air effluent streams to the atmosphere from the following sources:

(a) Five 3163 Cooper Bessemer LSV 16 Gen-Set stacks identified in the application by the designation G5, G-6, G-7, G-8, and G-9;

(b) the Power Boiler exhaust stack;

(c) the Fuel Gas line Heater exhaust stack;

(d) the space ventilation exhaust stacks as described in the application;

(e) the space heater exhaust vents as described in the application; and

(f) any other source authorized in writing by the Director.

4.1.3 The approval holder shall maintain the following stacks according to the minimum height requirements specified in TABLE 4.1-A and TABLE 4.1-B:

TABLE 4.1-A STACK HEIGHTS

MINIMUM HEIGHT STACK ABOVE GRADE (metres)

Power Boiler Exhaust Stack 11.0

Fuel Gas Line Heater Exhaust Stack 3.6

TABLE 4.1-B STACK HEIGHTS

GEN-SET RATED MINIMUM HEIGHT NUMBER OF CAPAC ITY ABOVE GRADE ENGINES KILOWATTS (kW) (metres) ,

Cooper Bessemer LSV 16 5 12.0 Gen-Set 3163 KW

4.1.4 The approval holder shall control fugitive emissions and any source not specified in 4.1.2 in accordance with 4.1.5 of this approval unless otherwise authorized in writing by the Director. APPROVAL NO. 147028-01-00 Page 9 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

4.1.5 With respect to fugitive emissions and any source not specified in 4.1.2, the approval holder shall not release a substance or cause to be released a substance that causes or may cause any of the following:

(a) impairment, degradation or alteration of the quality of natural resources;

(b) material discomfort, harm or adverse effect to the well being or health of a person; or

(c) harm to property or to vegetative or animal life.

AIR LIMITS

4.1.6 Releases of the following substances to the atmosphere shall not exceed the limits specified in TABLE 4.1-C.

TABLE 4.1-C LIMITS

EMISSION SOURCE SUBSTANCE LIMIT

Cooper Bessemer LSV 16 Gen-sets (G-5, G-6, G-7, G-8, G-9) NOx 19.2 kg/hr

MONITORING AND REPORTING

4.1.7 The approval holder shall monitor the air emission sources as specified in Table 4.1-0.

4.1.8 The approval holder shall report to the Director the results of the air emission source monitoring as required in Table 4.1.0.

TABLE 4.1-0 SOURCE MONITORING AND REPORTING

i I

Emission Method of Method of Reporting Report Parameter Frequency Source Monitoring Analysis Frequency To I

Cooper Bessemer Nitrogen Oxides Alberta Stack Month after LSV 16 Gen-sets (expressed as Manual Once per year Sampling the survey is Director (G-5, G-6, G-7, N02), & Carbon Stack Survey Code done G-8, G-9) Monoxide

, APPROVAL NO. 147028-01-00 Page 10 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

4.1.9 The monitoring required by 4.1.7, shall at a minimum, comply with:

(a) the Alberta Stack Sampling Code, Alberta Environment, 1995 as amended;

(b) the CEMS Code; and

(c) the Air Monitoring Directive, Alberta Environment, 1989, as amended.

4.1.10 The approval holder shall notify the Director in writing a minimum of two weeks prior to any manual stack survey that is required to be conducted by this approval.

4.1.11 The approval holder shall submit an annual air emissions report which contains information related to plant operation, performance of air pollution control equipment and air contaminant emissions.

SECTION 4.2: INDUSTRIAL WASTEWATER

OPERATIONS

4.2.1 The approval holder shall not release any substances from the plant to the surrounding watershed except as authorized by this approval.

4.2.2 The approval holder shall manage:

(a) industrial wastewater; and

(b) industrial runoff

as described in the application, unless otherwise authorized in writing by the Director.

4.2.3 The approval holder shall only dispose of industrial wastewater as follows:

(a) to an Alberta Energy Resources Conservation Board approved disposal well;

(b) to an Alberta Energy Resources Conservation Board approved Waste Processing and Disposal Facility; or APPROVAL NO. 147028-01-00 Page 11 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

(c) as otherwise authorized in writing by the Director.

SECTION 4.3: WASTE MANAGEMENT

OPERATIONS

4.3.1 The approval holder shall dispose of waste generated at the plant only:

(a) to facilities holding a current Act authorization;

(b) to facilities approved by a local environmental authority outside of Alberta; or

(c) as otherwise approved in writing by the Director.

4.3.2 The approval holder shall not:

(a) release; or .

(b) dispose of

any waste to the surrounding environment, except in accordance with 4.3.1.

4.3.3 The approval holder shall not:

(a) receive; or

(b) store

any third party waste at the plant.

4.3.4 The approval holder shall store hazardous waste or hazardous recyclables stored in containers or tanks in accordance with the Hazardous Waste Storage Guidelines, June 1988, Alberta Environment, as amended. APPROVAL NO. 147028-01-00 Page 12 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

SECTION 4.4: DOMESTIC WASTEWATER

OPERATIONS

4.4.1 The approval holder shall not release any substances from the domestic wastewater system to the surrounding watershed except as authorized by this approval.

4.4.2 The approval holder shall direct all domestic wastewater to the septic tank.

4.4.3 The approval holder shall dispose of domestic wastewater generated at the facility only at a wastewater treatment facility holding a current Approval or Registration under the Act.

SECTION 4.5: GROUNDWATER

Not used at this time.

SECTION 4.6: SOIL

Not used at this time.

PART 5: FINANCIAL SECURITY REQUIREMENTS

5.1.1 Not used at this time.

PART 6: DECOMMISSIONING AND LAND RECLAMATION

SECTION 6.1: GENERAL

6.1.1 The approval holder shall apply for an amendment to this approval to reclaim the plant by submitting a:

(a) Decommissioning Plan; and

(b) Land Reclamation Plan

to the Director. APPROVAL NO. 147028-01-00 Page 13 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

6.1.2 The approval holder shall submit the:

(a) Decommissioning Plan; and

(b) Land Reclamation Plan

referred to in 6.1.1 within six months of the plant ceasing operation, except for repairs and maintenance, unless otherwise authorized in writing by the Director

SECTION 6.2: DECOMMISSIONING

6.2.1 The Decommissioning Plan referred to in 6.1.1 shall include, at a minimum, all of the following:

(a) a plan for dismantling the plant;

(b) a comprehensive study to determine the nature, degree and extent of contamination at the plant and affected lands;

(c) a plan to manage all wastes at the plant;

(d) evaluation of remediation technologies proposed to be used at the plant and affected lands;

(e) a plan for decontamination of the plant and affected lands in accordance with the following:

(i) for soil or groundwater, Alberta Tier 1 Soiland Groundwater Remediation Guidelines, Alberta Environment, February 2009, as amended,

(ii) for soil or groundwater, Alberta Tier 2 Soil and Groundwater Remediation Guidelines, Alberta Environment, February 2009, as amended,

(iii) for drinking water, Canadian Environmental Quality Guidelines, Canadian Council of Ministers of the Environment, PN 1299, 1999, as amended, and APPROVAL NO. 147028-01-00 Page 14 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

(iv) for surface water, Surface Water Quality Guidelines for Use in Alberta, Alberta Environment, November 1999, as amended;

(f) confirmatory testing to indicate compliance with the remediation objectives;

(g) a plan for maintaining and operating contaminant monitoring systems;

(h) a schedule for activities (a) through (g) above; and

(i) any other information as required in writing by the Director.

6.2.2 If the Decommissioning Plan is found deficient by the Director, the approval holder shall correct all deficiencies identified in writing by the Director by the date specified in writing by the Director.

SECTION 6.3: LAND RECLAMATION

6.3.1 The Land Reclamation Plan referred to in 6.1.1 shall include, at a minimum, all of the following:

(a) the final use of the reclaimed area and how equivalent land capability will be achieved;

(b) removal of infrastructure;

(c) restoration of drainage;

(d) soil replacement;

(e) erosion control;

(f) revegetation and conditioning of the plant including:

(i) species list, seed source and quality, seeding rates and methods,

(ii) fertilization rates and methods, and

(iii) wildlife habitat plans where applicable; APPROVAL NO. 147028-0 1-00 Page 15 of 15

TERMS AND CONDITIONS ATTACHED TO APPROVAL

(g) reclamation schedule; and

(h) any other information as required in writing by the Director.

6.3.2 If the Land Reclamation Plan is found deficient by the Director, the approval holder shall correct all deficiencies identified in writing by the Director by the date specified in writing by the Director.

April in ,20 12

DATE DESIGNATED RECTOR UNDER THE ACT Gary Sasseville Northstone Power Corp. Elmworth Power Plant - Approval Amendment November 2013

APPENDIX 2 AIR QUALITY ASSESSMENT

Amberg Environmental & Regulatory Consultants 24 AIR QUALITY ASSESSMENT for Approval Amendment 147028-01-00

Prepared for:

ELMWORTH GENERATING STATION PO Box 5203, Alberta Ave Spruce Grove, AB T7X 3A3

Prepared by:

AMBERG

Environmental & Regulatory Consultants 600, 440 – 10816 MacLeod Trail S. Calgary, Alberta T2J 5N8 Tel: (403) 247 – 3088

November 28, 2013

ADI 104 000

Northstone Power Corp - Air Quality Assessment (ADI 104 000) 2013

EXECUTIVE SUMMARY

Northstone Power Corp. (NPC) is independent power producer that operates a 9.3 MW natural gas/diesel power generation plant located near Elmworth, Alberta. The facility has four turbine gen-sets each rated at three MW and the recent Approval renewal addressed the addition of a fifth three MW turbine gen-set. Prior to the installation of the fifth gen-set, an opportunity arose to add a 9.3 MW reciprocating engine gen-set instead of the planned turbine gen-set. Amberg Corp. - Environmental & Regulatory Consultants (Amberg) was retained by NPC to predict the impact proposed gen-set would have on regional air quality. The proposed reciprocating engine / gen-set combination, even though capable of generating four times the MW output of the originally proposed turbine / gen-set, would have a lower emissions footprint.

Air quality assessment focused on nitrogen dioxide (NO2), which are subject to Alberta Ambient Air Quality Objectives (AAAQO). To perform the assessment, the AERMET and AERMOD models were used. Three cases were modeled for the assessment:

Existing Case # 1 - The existing facility was modeled by itself; including four current engine / generators, a package boiler, and a line heater at the NPC facility with the ConocoPhilips facility just south of the NPC facility and sources found to be within 5 km of NPC.

Case Alone # 2 - This model was run to examine the impacts of the NPC facility’s five gen-sets, package boiler, and a line heater alone without the impacts of surrounding sources.

Approval Case # 3 - This model was run to consider the impacts of the four existing gen-sets, the one proposed additional gen-set, a package boiler, a line heater, and sources within 5 km of the NPC facility including the Conoco-Philips plant just south of NPC’s facility.

Predicted values included background concentrations as collected by the Beaverlodge air monitoring station for Nitrogen Oxides (NOX). The values for NOX were inputted into the AERMOD model as

AERMOD was required to determine the total transformation from NOX to NO2.

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Background Concentrations

Species Average 1-hour Concentration Average 1-hour Concentration ug/m3 ppb

Nitrogen Dioxide NO2 7.431 3.668

Predicted air concentrations plus ambient air concentrations, and AAAQOs are illustrated for comparison in the table below.

Comparison of Predicted NO2 Concentrations to AAAQO

Case 99.9 Percentile Average 1-hour Average Annual Concentration / with Added Concentration / AAAQO Ambient Air Concentration / 3 ug/ m NO AAAQO 2 3 ug/ m NO2

Existing Case 1 - existing facility with surrounding sources 241.86 / 249.29 / 300.00 30.59 / 45.00

Alone Case 2 - existing facility plus 5th engine/generator alone 258.34 / 265.77 / 300.00 29.84 / 45.00

Approval Case 3 - existing facility plus 5th engine/generator with 258.43 / 265.86 / 300.00 31.83 / 45.00 surrounding sources

Considering predicted concentrations of NO2 and the addition of surrounding sources and ambient levels

of NO2, the facility will not result in exceedances of the Alberta Ambient Air Quality Objectives.

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TABLE OF CONTENTS

EXECUTIVE SUMMARY ...... i TABLE OF CONTENTS ...... iii LIST OF TABLES ...... iv LIST OF FIGURES...... iv 1.0 INTRODUCTION ...... 1 1.1 Regional Characteristics ...... 2 1.2 Background Ambient Air Quality ...... 2 2.0 ASSESSMENT APPROACH ...... 3 2.1 Ambient Air Quality Objectives ...... 3 2.2 Model Application ...... 3 2.3 Data Selection ...... 5

2.4 Plume Volume Molar Ration Method (PVMRM) for NO2/NOx ...... 5 2.5 Spatial Boundaries ...... 5 2.6 Meteorological Conditions ...... 6 2.7 Project Emissions ...... 6 2.8 Background Emissions ...... 6 3.0 ASSESSMENT CASES ...... 9 3.1 Existing Facility Case 1 ...... 9 3.2 Existing Facility Plus 3.0 MW Engine/Generator Cases 2 and 3 ...... 9 4.0 RESULTS ...... 10

4.1 Predicted NO2 Concentrations ...... 10 5.0 SUMMARY ...... 11 6.0 REFERENCES ...... 12

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LIST OF TABLES

Table 1. Background NO2 Air Concentration ………………………………………………………………...2 Table 2. Alberta Ambient Air Quality Objectives ………………..…………………..……………….……....3 Table 3a. Nested Receptor Grid Bounding Box Values …………………………….……………………...... 4 Table 3b. Nested Receptor Grid Values ……………………..…………………………………………………4 Table 4. Fence Line Nested Receptor Grid Values ....……..……………………………….………..……...4 Table 5. Project Air Emission Sources ..…………………………………………………………..……….....7 Table 6. Background Air Emission Sources …………………………….…..………………………………..8

Table 7. NO2 - Maximum Predicted Concentrations - Operational Scenarios ...….…………………….10

LIST OF FIGURES

Figure 1. Plant Location ……………………………………………………………………..…………….…..13 Figure 2. Plant Layout ………………………………………………………………………………………….14 Figure 3. 3D View of Plant Model Looking Northeast ……..………………………………………...……..15 Figure 4. Topographical Features ….…………………………………………………………………...…….16 Figure 5. Wind Vectors – Wind Rose ……………………………………………………..……………..…...17 Figure 6. Wind Class Frequency ……………………………………………………………...……………....18 th Figure 7. 1-Hour NO2 99.9 Highest Percentile - Existing Case 1 ……...... 19 th Figure 8. 1-Hour NO2 99.9 Highest Percentile - Case Alone 2 …………………………………………..20 th Figure 9. 1-Hour NO2 99.9 Highest Percentile – Approval Case 3 ………………………………………21 st Figure 10. Annual NO2 1 Highest Percentile - Existing Case 1 ....…………………………………………22 st Figure 11. Annual NO2 1 Highest Percentile - Case Alone 2 ……………………………………………....23 st Figure 12. Annual NO2 1 Highest Percentile - Approval Case 3 …………………………………...... 24

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1.0 INTRODUCTION

Northstone Power Corp. (NPC) is independent power producer that operates a 9.3 MW natural gas/diesel power generation plant located near Elmworth, Alberta. The facility has four turbine gen-sets each rated at three MW and the recent Approval renewal addressed the addition of a fifth three MW turbine gen-set. Prior to the installation of the fifth gen-set, an opportunity arose to add a 9.3 MW reciprocating engine gen-set instead of the planned turbine gen-set. Amberg Corp. - Environmental & Regulatory Consultants (Amberg) was retained by NPC to predict the impact proposed gen-set would have on regional air quality. The proposed reciprocating engine / gen-set combination, even though capable of generating four times the MW output of the originally proposed turbine / gen-set, would have a lower emissions footprint. The current power plant is located just outside of Elmworth, Alberta, approximately 60 km west of Grand Prairie, as shown in Figure 1.

The facility has four natural gas/diesel powered engine/generators, which are each capable of producing 3.0 MW. The four engine/generators are located in one building, with each having their own individual stack. Figure 2 shows the current plant layout. An additional concrete pad has been poured for a fifth engine/generator, which is currently not present. Figure 3 shows a three-dimensional model of the facility. Considering the emissions from the four engine/generators as well as a potential fifth, the species of

interest for the air quality assessment were oxides of nitrogen, expressed as Nitrogen Dioxide (NO2) which is subject to Alberta Ambient Air Quality Objectives (AAAQO).

To perform the assessment, the AERMET and AERMOD models were used. Three cases were modeled for the assessment.

Existing Case # 1 - The existing facility was modeled by itself; including four current engine / generators, a package boiler, and a line heater at the NPC facility with the Conoco Philips facility just south of the NPC facility, and sources found to be within 5 km of NPC.

Case Alone # 2 - This model was run to examine the impacts of the five engine/generators, package boiler, and a line heater alone without the impacts of surrounding sources.

Approval Case # 3 - This model was run to consider the impacts of the four existing engine/generators, the one proposed additional engine/generator, a package boiler, a line heater, and sources within 5 km of the NPC facility including the Conoco Philips plant just south of NPC’s facility.

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1.1 Regional Characteristics

Terrain in the study region is generally flat. The Wapiti River flows across the south of the study area from the southwest to the east. The plant site has an elevation of 716 m above sea level and terrain height slopes gently towards to the river valley to the south. Figure 4 shows the terrain elevations.

1.2 Background Ambient Air Quality

Background ambient air quality for NO2 was collected by the Alberta Environment & Sustainable Resource Development (ESRD) and data was accessed from the Clean Air Strategy Alberta (CASA) website (www.CASAdata.org). The air quality monitoring station closest to the facility is “Beaverlodge” located northwest of Elmworth just off Highway 43.

Background ambient air concentrations for NO2 from the Beaverlodge Station were retrieved for each hour st st between October 1 2012 and October 31 2013 inclusive. From these values a one-hour average NO2 value was determined; this value was added to the air models as a background value.

Background concentrations for NO2 are summarized in Table 1.

Table 1. Background NO2 Concentrations

Species Average 1-hour Average 1-hour Concentration Concentration ug/m3 ppb

Nitrogen Dioxide (NO2) 7.431 3.668

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2.0 ASSESSMENT APPROACH

Ambient Air Quality Objectives have been established for Alberta, including values for NO2 . The impact of industrial air emissions is compared to these objectives to assess compliance.

The assessment of industrial emissions on air quality can be achieved by the application of dispersion models. The Alberta Environment and Sustainable Resource Development (ESRD) Air Quality Modeling Guideline (2013) provides guidance on the selection of appropriate models and their application to air quality assessment.

2.1 Ambient Air Quality Objectives

Alberta Ambient Air Quality Objectives (AAAQO) exist for regulated substances and specify concentrations for averaging periods ranging from one hour to one year. The specie of interest for this

study is NO2 . The AAAQO averaging periods and concentrations for this substance are provided in Table 2.

Table 2. Alberta Ambient Air Quality Objectives

Parameter Period Alberta AAAQO (µg/m3)

Nitrogen Dioxide (NO2) 1-Hour 300

Annual 45

2.2 Model Application

Several dispersion models are available for predicting the impact of air emissions on ground level concentrations of species of interest in the surrounding area. The AERMOD model was selected as a thorough application for this assessment. The AERMET meteorological preprocessor and the AERMOD dispersion model are recommended in the Alberta ESRD (2013) modeling guideline. AERMOD is a Gaussian modeling system which is applicable for a modeling domain of 20km x 20km as was used in this assessment.

To meet Alberta ESRD’s modeling guideline for receptor points in AERMOD a Nested Receptor grid was established with the values found in Tables 3a & 3b. In addition to the nested receptor grid, a fence line receptor grid was also established with values listed in Table 4. The initial bounding box’s size approximates property values of the NPC facility.

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As per ESRD’s modeling guidelines the area within the facility fencelines are not subject to the AAAQO’s. This included the area within NPC’s fenceline and the adjacent ConocoPhillips site. It should also be noted that building downwash effects were considered in the AERMOD model.

Table 3a. Nested Receptor Grid Bounding Box Values

X (Easting) Y (Northing)

Origin, (m) 331694 6103084

Size, (m) 133 102

Spacing, (m) 20 20

Table 3b. Nested Receptor Grid Values

Distance from Bounding Box, (m) Receptor Spacing, (m)

1 500 50

2 2000 250

3 5000 500

4 10000 1000

Table 4. Fence Line Nested Receptor Grid Values

Distance (m)

Fence Line Spacing 20

Segment Spacing, (m) Tier Spacing, (m)

Tier 1 25 50

Tier 2 50 50

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2.3 Data Selection

The AERMOD model calculated maximum hourly average concentrations within the assessment area. Due to extremely rare and transient meteorological conditions the maximum concentrations at times do not represent observed conditions. The Air Modeling Guideline recommends using the 99.9 percentile (9th highest value) for one-hour values in place of the maximum predicted value and these values were considered to be the basis for determining compliance. All values for annual periods were included.

2.4 Plume Volume Molar Ration Method (PVMRM) for NO2/NOx

There are several species of nitrogen oxides (NOx), however, only nitrogen dioxide (NO2) is subject to the Alberta Ambient Air Quality Objectives.

Use of the Plume Volume Molar Ration Method (PVMRM) allows for the conversion of NO to NO2

governed by the presence of ozone (O3) in the atmosphere. The PVMRM approach also allows for

multiple nearby plumes to merge in the atmosphere for calculating NO2/NOx ratios.

In keeping with the Alberta Air Modeling Guideline a single representative value of O3 was inputted into AERMOD. This value was determined from data collected at the Beaverlodge air monitoring station where st st the average O3 values from October 1 2012 to October 31 2013 inclusive were averaged to give a value of 0.03 ppm.

The in-stack ratio of NO2/NOx was not known; therefore the default value of 0.10 was used in the air

model as per Alberta Air Modeling Guidelines. The default equilibrium ratio of NO2/NOx used in the

AERMOD-PVMRM model is 0.90. Given a per hour O3 value AERMOD (v - 7.1.0) calculated the

conversion of NOx to NO2 from these values for each hour of the model run.

2.5 Spatial Boundaries

The air quality assessment of the project considered three levels of domains as part of the study approach. These were as follows:

o Modeling domain - A 20 km x 20 km area centered on the project location was developed to include the terrain area mapped in the region.

o Air Quality domain - A 12 km by 12 km area centered on the project location was considered for assessing air-quality impacts of the project at the local level. AERMOD using these singular hourly wind vectors, which are universally across the modeling domain, to determine the

concentrations of NOx.

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o Source Domain – Other industrial sources in a 5 km radius, centered on the project location, were included within the study as they would directly impact model outputs. These other industrial sources were identified in Figure 1.

2.6 Meteorological Conditions

As per section 3.2 of the Alberta Air Modeling Guideline the Multi-Model Extraction Utility (MMEU) and data from the Alberta Environment and Water provided via http://www.albertamm5data.com/ were used to create a SAMSON Surface Meteorological (*.SAM) and Upper Air (*.UA) files. The MMEU determined the closet 12 km cell to the site. The SAMSON and Upper Air files were complied for 2002 to 2006 inclusive. AERMET used these two input files to create a Surface Meteorological Data set and a Profile Air Data set for use directly in AERMOD.

The meteorological data processed provides a wind vector individual to the area which for every hours from January 1st, 2002 to December 31st, 2006. These vectors are summarized in a wind rose shown in Figure 5 and wind class frequency distributions shown in Figure 6.

2.7 Project Emissions

The NPC Elmworth facility currently operates four Cooper-Bessemer 3 MW LSV 16 engine/generators and one power boiler, which are all housed within one building on site plus a small natural gas line heater to the east of the main building. Each engine/generator operates its own dedicated stack, which is located in succession just north of the building. The facility layout is shown in Figure 2. In addition to the existing four engine/generators, the current building has room and a concrete pad already poured for a fifth engine/generator. The addition of a fifth Wartsila reciprocating engine/generator, which would be located within the existing building furthest to the east side, has also been modeled in scenarios listed below. Emissions source physical parameters and emission rates are provided in Table 5. Emission rates of oxides of nitrogen for the Cooper-Bessemer engine/generators were based on stack emission rates used in the February 13th, 2001 "Air Quality Changes Associated with the Proposed Northstone Elmworth Power Plant" report performed by RWDI. Emissions from the new Wartsila engine are based on manufacturer’s data.

2.8 Background Emissions

Numerous other emission sources exist within the 5 km source domain. Industrial sources of NO2 were included in the three scenarios. Source information for the ConocoPhillips facility located a few hundred meters from NPS was provided by ConocoPhillips. Additional source information for sites within 5 km of NPC was taken from Environment Canada’s NPRI website and is summarized in Table 6.

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Table 5. Project Air Emission Sources.

Easting Northing Elevation Source Source Exit Exit Temp. Maximum # Source Height Diameter Velocity o Emissions (m) (m) (m) (m) (m) (m/s) ( K) (g/s) NOx

3 MW Copper Bessemer 1 331755 6103260 716 12.00 0.508 50.0 755 5.30 LSV 16 gen-set

3 MW Copper Bessemer 2 331761 6103260 716 12.00 0.508 50.0 755 5.30 LSV 16 gen-set

3 MW Copper Bessemer 3 331767 6103260 716 12.00 0.508 50.0 755 5.30 LSV 16 gen-set

3 MW Copper Bessemer 4 331773 6103260 716 12.00 0.508 50.0 755 5.30 LSV 16 gen-set

9.3 MW Wartsila 20V34SG 5 331779 6103260 716 12.00 1.22 28.0 642 3.506 engine / gen-set

6 Line Heater 331816 6103275 717 3.66 0.25 28.0 745 0.0123

7 Power Boiler 331748 6103252 716 11.00 0.20 20.0 473 0.014

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Table 6. Background Air Emission Sources.

# Source Easting Northing Elevation Source Source Exit Exit Temp. Emissions Height Diameter Velocity o (g/s) NOx (m) (m) (m) ( K) (m) (m) (m/s)

8 CP - Deep Cut Recompressor 331664 6102567 723 14.10 2.44 37.5 724 39.3 9 CP K1201 332043 6102544 723 13.99 0.32 33.5 761 9.2 10 CP K1202 332052 6102543 723 13.99 0.32 33.5 761 9.2 11 CP K1203 332076 6102549 723 12.00 0.71 26.5 728 0.6 12 CP K1204 331991 6102434 728 7.90 0.31 47.1 728 0.6 13 CP K117 331937 6102549 723 7.90 0.31 47.1 728 0.6 14 CP K118 331937 6102538 723 7.90 0.31 47.1 728 0.6 15 CP K119 331937 6102526 723 7.90 0.31 47.1 728 0.6 16 CP K140 331930 6102591 723 8.10 0.31 47.1 728 0.6 17 CP H710 331492 6102602 722 8.00 0.71 6.4 426 0.11 18 CP H711 331495 6102587 722 8.00 0.71 6.4 426 0.11 19 CP H722 331493 6102551 722 8.00 0.71 6.4 426 0.11 20 CP H723 331490 6102535 722 8.00 0.71 6.4 426 0.11 21 CP Summed Minor Emissions 331734 6102562 723 10.00 1.00 6.8 523 1.97 ConocoPhillips - Windsor Comp 22 332957 6103645 719 12.00 0.50 7.0 573 3.0 Station D-043

ConocoPhillips - Elmworth Comp 23 332516 6101752 721 12.00 0.50 7.0 573 0.79 Stn 11-04-070-11W6

ConocoPhillips - Elmworth Comp 24 332753 6101770 734 12.00 0.50 7.0 573 0.79 Stn 11-01-070-12W6

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3.0 ASSESSMENT CASES

To assess the impact on air quality and the changes the project would have on existing conditions, three separate cases were modeled. These included:

• The Existing project • The project Alone with additional fifth engine • The Approval project is the existing project with additional fifth engine/generator and surrounding sources.

Figures depicting ground level concentrations of species of interest and time averaging periods are indicated and summarized in Table 7 for NO2 in Section 4.0.

3.1 Existing Facility Case 1

Case # 1 - The existing facility case was modeled by itself; including four currently operating engine/generators, the package boiler, and the line heater at the NPC facility with the influence of surrounding sources of the ConocoPhilips facility just south of the NPC facility.

In addition to the above model, NPC requested that Amberg also model the potential impacts if NPC added one additional engine/generator to the four already present in their Elmworth facility. Two models bellow were used to determine the impacts of five engine/generators at the NPC facility. The two secondary models were similar to the initial model described above with the addition of a fifth Wartsila 20V34SG engine/generator added to the NPC site.

3.2 Existing Facility Plus 9.3.0 MW Engine/Generator Cases 2 and 3

Case # 2 - This model was run to examine the impacts of the five engine/generators, the package boiler, and the line heater alone without the impacts of surrounding sources.

Case # 3 - This model was run to consider the impacts of the five engine/generators, the package boiler, the line heater, and sources found to be within 5 km of the NPC facility in the NPRI database including the Conoco Philips plant just south of NPC’s Elmworth facility.

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4.0 RESULTS

Emissions of Nitrogen Dioxide (NO2) were modeled using AERMOD to predict ground level concentrations for Existing Facility with Surrounding Sources, Existing Facility with 5th engine/gen-set alone, and Existing Facility with 5th engine/gen-set and Surrounding Sources cases were run for each species and averaging period required by the Alberta Ambient Air Quality Objectives. Results of these predictions are described in the sections below.

4.1 Predicted NO2 Concentrations

Table 7 summarizes the predicted valued from the data portrayed in the figures.

th o 99.9 Percentile Maximum 1 – hr NO2 concentrations for Existing Facility with Surrounding Sources, Existing Facility with 5th Engine / Generator, and Existing Facility with 5th Engine / Generator and Surrounding Sources, are shown in Figures 7, 8, and 9 respectfully.

o Maximum Annual NO2 concentrations for Existing Facility with Surrounding Sources, Existing Facility with 5th Engine / Generator, and Existing Facility with 5th Engine / Generator and Surrounding Sources, are shown in Figures 10, 11, and 12 respectfully.

Table 7. NO2 – Predicted Concentrations - Operational Scenarios

Case 1 Case 2 Case3 Existing Existing Existing Facility Facility with Facility Alone with 5th Engine AAAQO Figures Surrounding with 5th and Surrounding Sources Engine Sources

Species

99.9th Max 1-hour NO 2 241.86 258.34 258.43 300 7/8/9 Concentration (µg/m3)

th 99.9 Max 1-hour NO2 Concentration with added 249.29 265.77 265.86 300 Background Concentration (µg/m3)

Maximum Annual NO 2 30.59 29.84 31.83 45 10/11/12 Concentration (µg/m3)

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5.0 SUMMARY

Emissions associated with the operation of the NPC Elmworth facility focused on Nitrogen Dioxide (NO2). Operating scenarios considered maximum and anticipated emissions profiles. Air quality impacts were

modeled using the AERMOD dispersion model. All predicted NO2 values were within Alberta Ambient Air Quality Objectives even when background concentrations and a fifth operating engine / generator and a line heater were added to the NPC Elmworth plant.

Emissions from the proposed fifth Wartsila 9.3 MW engine / gen-set were marginally lower than the previous air quality assessment done to support the Application Renewal which included a fifth Cooper-

Bessemer 3MW turbine / gen-set. Air quality results predicted for NO2 were marginally lower and in line with anticipated outcomes.

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6.0 REFERENCES

Alberta Environment and Sustainable Resource Development (ESRD), 2009 rev. 2013. Air Quality Model Guideline, Edmonton, Alberta http://environment.alberta.ca/01004.html

Alberta Environment and Sustainable Resource Development (ESRD), April 2011. Alberta Ambient Air Quality Objectives and http://environment.gov.ab.ca/info/library/5726.pdf

Alberta Environment and Sustainable Resource Development (ESRD), May 2009, Multi-Model Extraction Utility (MMEU) and 2002 – 2006 Alberta Meteorological Data Set: MMEU User’s Guide, Edmonton, Alberta

Alberta Environment and Sustainable Resource Development (ESRD), Air Quality Monitoring in the County of Grande Prairie, June 15 20 28, 1999. ISBN 0-7785-0687-8 Pub No. T/470. Edmonton, Alberta.

Clean Air Strategy Alberta, 120120 Beaverlodge Yearly NOx Readings. Beaverlodge – 2013 Data. http://www.casadata.org.

Clean Air Strategy Alberta. 120120 Beaverlodge Yearly O3 Readings. Beaverlodge – 2013 Data. http://www.casadata.org.

Environment Canada, National Pollutant Release Inventory, 2010, via NPRI Map Layers for Use with Google Earth.

RDWI, Air Quality Changes Associated with the Proposed Northstone Elmworth Power Plant RDWI Project: 01-197W. February 13, 2001, Calgary, Alberta

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Northstone Power ConocoPhillips Windsor Plant Compressor Station

ConocoPhillips Facility

ConocoPhillips Elmworth ConocoPhillips Elmworth Compressor Station 11-01 Compressor Station 11-04

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Engine / Engine / Engine / generator 1 generator 2 generator 3

Engine / Power generator 4 Boiler Line Heater

Engine / generator 5

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Engine / generator 3 Line Heater

Engine / Engine / generator 2 generator 4

Engine / generator 1 Engine / generator 5

Power Boiler

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WRPLOT View - Lakes Environmental Software

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