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    2020 Annual Report for Authorization 8808 Atlantic Power - Williams Lake Power Plant Jacob Steyl 4455 Mackenzie Ave N, Williams Lake, V2G 5E8


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant Executive Summary This Report details the Environmental Emissions from January 1, 2020 to December 31, 2020 and fulfils the requirement of section 3.6 of Authorization 8808 [1]. No rail ties or greater than 1% construction and demolition (C&D) waste were used as feedstock during the reporting period. A total of 368,819 wet tonnes of clean biomass was incinerated during 5,362 hours of normal operation. During this time two discrete monitoring sessions (one for Air Discharge from the Stack and one for Ash Analysis) were performed. The test results were compared against the levels in Permit 8808 and the Hazardous Waste Regulation, and no exceedances of any of the parameters in Schedules A and D of the Permit measured. Continuous Emissions Monitoring System (CEMS) measurements were also taken as required by the Permit throughout this Period, with no exceedances recorded. Respectfully, Jacob Steyl, P.Eng January 04, 2021 i


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant Table of Contents Table of Tables and Figures ......................................................................................................................... ii Nomenclature and Abbreviations ..................................................................................................................iii 1 Introduction............................................................................................................................................ 1 2 Monthly Operating Hours ...................................................................................................................... 2 3 Fuel ....................................................................................................................................................... 2 4 Continuous Emissions Monitoring ......................................................................................................... 3 4.1 Sulphur Oxides .................................................................................................................................. 3 4.2 Nitrogen Oxides ................................................................................................................................ 3 4.3 Hydrochloric Acid .............................................................................................................................. 3 4.4 Combustion Temperature ................................................................................................................. 3 5 Discrete Monitoring ............................................................................................................................... 4 5.1 Air Emissions Stack Test .................................................................................................................. 4 5.2 Ash Testing ....................................................................................................................................... 5 6 Exceedances ......................................................................................................................................... 6 7 References ............................................................................................................................................ 6 Appendix A – Stack Particulate Test ............................................................................................................. 8 Appendix B - Ash Analysis Report .............................................................................................................. 48 Table of Tables and Figures Table 2-1: Operating hours per month .......................................................................................................... 2 Table 3-1: Monthly and Annual Amounts of Fuel .......................................................................................... 2 Table 4-1: Maximum hourly NOx as NO2 per month and average for the Month ......................................... 3 Table 5-1: Schedule A Discrete Monitoring Results ..................................................................................... 4 Table 5-2: Schedule D Discrete Monitoring Results ..................................................................................... 5 Figure 1-1: Normal Operating time for 2020 ................................................................................................. 1 Figure 5-1: Hourly Average Steam Production data for 11 March 2020 Discrete Testing ........................... 6 ii


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant Nomenclature and Abbreviations C&D - Construction and Demolition waste MoE - Ministry of Environment NO₂ - Nitrogen Dioxide NOₓ - Nitrogen Oxides O₂ - Molecular Oxygen TEQ - Toxic Equivalency USEPA - United States Environmental Protection Agency hr - Hour kg/s - Kilograms per Second lb/hr - Pounds per Hour m³/s - Cubic Meter per second mg/kg – Milligrams per Kilogram (1 ppm) mg/L - Milligrams per Liter mg/m³ - Milligrams per cubic Meter MW – Megawatt pg/g – Picogram per Gram (0.001ppb) ppb - Parts Per Billion ppm - Parts Per Million (1,000 ppb) ton/hr - Imperial Ton per Hour tonnes/hr - Metric Tonnes per Hour iii


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant 1 Introduction An amendment was issued for permit 8808 on 18 September 2019 to Atlantic Power Preferred Equity Ltd located at 4455 Mackenzie Ave N, Williams Lake, B.C., V2G 4R7. The revised permit calls for an Annual Report outlined in Section 3.6 of the Permit [1]. Jacob Steyl P.Eng, Maintenance Manager and Chris Turner, Controls Specialist were responsible for collecting data and compiling this report. A. Lanfranco & Associates Inc. and Bureau Veritas conducted discrete monitoring outlined in sections 3.1.2 Schedule A and 3.1.3 Schedule D of the Permit [1]. The reporting window for this Report is 00:00 on 1 January 2020 to 00:00 1 January 2021. The Plant was curtailed for extended periods during the year, as show in Figure 1-1 and Table 2-1. Figure 1-1: Normal Operating time for 2020 As no rail tie material was used as feedstock during the reporting period – Test Regimes Schedule A and D apply. Corrective and preventative maintenance, as well as calibrations, were performed on the Air Emissions Controls and Continuous Emissions Monitoring System (CEMS) equipment of the Authorized Works during the reporting period. 1


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant 2 Monthly Operating Hours Table 2-1 shows the operating time and time incinerating railway ties for each month. Table 2-1: Operating hours per month Operating time1 Incinerating of Railway ties time2 hr hr Jan-20 744 0 Feb-20 571 0 Mar-20 743 0 Apr-20 208 0 May-20 - - Jun-20 - - Jul-20 - - Aug-20 348 0 Sep-20 720 0 Oct-20 589 0 Nov-20 720 0 Dec-20 718 0 2020 Totals 5,362 0 3 Fuel The fuel usage for the reporting period is shown in Table 3-1. Table 3-1: Monthly and Annual Amounts of Fuel Rail ties Construction and Demolition Clean Biomass wet tonnes wet tonnes wet tonnes Jan-20 0 0 44,905 Feb-20 0 0 36,300 Mar-20 0 0 49,517 Apr-20 0 0 13,217 May-20 0 0 - Jun-20 0 0 - Jul-20 0 0 - Aug-20 0 0 22,701 Sep-20 0 0 50,190 Oct-20 0 0 41,127 Nov-20 0 0 53,672 Dec-20 0 0 57,191 2020 Totals 0 0 368,819 1 Operating time for Figure 1-1 and Table 2-1 is taken as combusting-biomass and breaker-closed time 2 Number of hours incinerating rail ties or greater than 1% construction and demolition waste 2


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant 4 Continuous Emissions Monitoring 4.1 Sulphur Oxides No rail ties or greater than 1% C&D waste was used as feedstock during the reporting period, therefore no monitoring for Sulphur Oxides was required or conducted. 4.2 Nitrogen Oxides The maximum hourly Nitrogen Oxides (NOₓ) as Nitrogen Dioxide (NO₂) per month and average for the month at 8% O₂ is show Table 4-1. The Permitted hourly average is 320 mg/m³ at 8% O₂ [1]. Table 4-1: Maximum hourly NOx as NO2 per month and average for the Month Maximum Hourly Average Monthly Average mg/m³ mg/m³ Jan-20 253 209 Feb-20 265 225 Mar-20 280 244 Apr-20 231 201 May-20 - - Jun-20 - - Jul-20 - - Aug-20 274 210 Sep-20 233 210 Oct-20 275 167 Nov-20 247 215 Dec-20 243 223 The average NOx emissions for the year was 213 mg/m³ at 8% O₂. The maximum hourly average for the year is 280 mg/m³ at 8%O₂ well below the Permitted level. 4.3 Hydrochloric Acid No rail ties or greater than 1% C&D waste were used as feedstock during the reporting period, therefore no monitoring for Hydrochloric Acid was required or conducted. 4.4 Combustion Temperature No rail ties or greater than 1% C&D waste were used as feedstock during the reporting period, therefore no monitoring of Combustion Temperature was required or conducted. 3


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant 5 Discrete Monitoring 5.1 Air Emissions Stack Test No rail ties or greater than 1% C&D waste were used as feedstock during the reporting period: Only Schedule A applies. The permitted levels under Schedule A [1] is stated in Table 5-1. A. Lanfranco & Associates Inc was retained to perform an Emission Compliance Survey and Monitoring Report, as per Schedule A of the Permit. The Triplicate test average results for the listed parameters for the Main Stack on March 11, 2020 are summarised in Table 5-1. The complete report can be found in Appendix A – Stack Particulate Test. Table 5-1: Schedule A Discrete Monitoring Results Parameter Test Average Permit Limits Rate of Discharge (m³/s) 97.7 110 Particulate (mg/m³ @ 8% O₂) 3.1 20 Both parameters measure is below permitted levels. The average steam flow during the Stack Test on Mar 11 was 525.7 klb/hr (66.2 kg/s). This meets the Operating Conditions requirements stipulated in section 3.3 of the Permit. 4


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant 5.2 Ash Testing No rail ties or greater than 1% C&D waste were used as feedstock during the reporting period: Only Schedule D applies. The permitted levels as per Schedule D [1] is stated in Table 5-2. Bureau Veritas was commissioned to perform ash analysis on a single ash sample collected before ash conditioning during normal operation. The ash sample was collected on 11 March 2020 under the same conditions as the stack test was conducted. The results from the test is summarised in Table 5-2. The complete reports can be found in Appendix B - Ash Analysis . Table 5-2: Schedule D Discrete Monitoring Results Parameter Average Permitted Limits [2] Arsenic (mg/L) 0.37 2.5 Barium (mg/L) 5.11 100 Boron (mg/L) 1.41 500 Cadmium (mg/L) <0.10 0.5 Chromium (mg/L) <0.10 5 Copper (mg/L) <0.10 100 Lead (mg/L) <0.10 5 Mercury (mg/L) <0.0020 0.1 Selenium (mg/L) <0.10 1 Silver (mg/L) <0.010 5 Uranium (mg/L) <0.10 10 Zinc (mg/L) 1.01 500 Dioxin/Furan TEQ (ppb) 0.0436 100 Polycyclic Aromatic Hydrocarbon TEQ (ppm) 0.026 100 All the parameters measured were well below the values stipulated in the Hazardous Waste Regulation [2]. 5


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant Figure 5-1: Hourly Average Steam Production data for 11 March 2020 Discrete Testing 6 Exceedances No exceedances were recorded under normal operating conditions during the reporting period. 7 References [1] Ministry of Environment, "Permit 8808 Amended 18 September 2019," Enviroment Canada, Williams Lake, 2016. [2] Ministry of Attorney General, Hazardous Waste Regulation BC Reg 63/88, Victoria: Queens Printer, 1988. 6


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant Appendices Appendix A – Stack Particulate Test 8 Appendix B - Ash Analysis 48 7


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    2020 Annual Report for Authorization 8808 - Atlantic Power - Williams Lake Power Plant Appendix A – Stack Particulate Test 8


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    Appendix A – Stack Particulate Test 9


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