Environmental Assessment for a New Landfill …

1 Waste Management of Canada Corporation Environmental Assessment for a New Landfill Footprint at the west carleton Environmental Centre ATMOSPHERIC Landfill GAS (VOC) DETAILED IMPACT Assessment Prepared by: RWDI Project Number: 60242342 Date: August, 2012 Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre T a b l e o f C o n t e n t s Page 1. Introduction .. 1 Description of the Preferred Alternative Landfill Footprint .. 3 Facilities Characteristics Report .. 3 Other WCEC Facilities .. 4 Atmospheric Air Quality Study Team .. 4 Contaminants of Interest .. 5 Applicable Guidelines .. 6 Emission Sources .. 7 Existing Landfill Mound under Final Cover .. 7 Preferred Alternative Landfill Footprint .. 8 Contaminated Soil Stockpiles .. 9 Landfill Gas-Fired Generators and Flares .. 9 Leachate Management System .. 11 Off-Site Sources .. 13 2. Landfill Footprint Study Areas.

2 14 3. Methodology .. 17 Assessment 17 Emission Rate Development .. 18 Existing Landfill Gas Emission Rate Calculations .. 18 Preferred Alternative Landfill Gas Emission Rate Calculations .. 19 Landfill Gas-Fired Generator and Flares .. 21 Contaminated Soil Stockpile Emission Rate Calculations .. 21 Leachate Management System Emission Rate Calculations .. 23 Landfill Gas Calibration Factor .. 26 Dispersion Modelling .. 27 Compounds 27 Sources Modelled .. 28 Meteorological Data .. 29 Area of Modelling .. 29 Terrain Data .. 30 Building Information .. 30 Averaging Periods Used .. 30 4. Additional Investigations .. 31 5. Detailed Description of the Environment Potentially Affected .. 31 Preferred Leachate Management System .. 31 On-Site and in the Vicinity .. 31 Discrete Receptors .. 33 Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre 6. Detailed Description of the Environment Potentially Affected with Contingency Leachate Management Method.

3 38 Contingency Leachate Management System .. 38 On-site and in the Vicinity .. 38 Discrete Receptors .. 39 7. Environmental Air Quality Net Effects .. 40 Potential Effects on Atmospheric Environment .. 40 Additional Mitigation and/or Compensation Measures .. 40 Potential Impacts on the Environment with Additional Mitigation 41 Net Effects .. 41 8. Impact Analysis of Other WCEC Facilities .. 44 9. Monitoring and Commitments for the Undertaking .. 45 Monitoring Strategy and Schedule .. 45 Environmental Effects Monitoring .. 45 Development of an Environmental Management Plan .. 45 Commitments .. 46 10. Environmental Air Quality Approvals Required for the Undertaking .. 46 11. References .. 47 List of Grap hs Graph 1. Summary of Landfill Gas Collected from Existing Landfill and Proposed Preferred Alternative Landfill and Maximum Equipment Capacity .. 11 List of Fig ures Figure 1. Preferred Alternative Landfill Footprint.

4 2 Figure 2. Preferred Alternative Landfill Footprint .. 15 Figure 3. WCEC Landfill Site Plan including Modelled Sources .. 16 Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre List of Tables Table 1. Summary of Applicable Criteria for Landfill Gas Compounds .. 6 Table 2. Summary of Emission Sources Included in Each Landfill Gas Modelling Scenario .. 18 Table 3. Summary of Maximum Predicted 24-Hour Concentrations Off-site for Each Future Build Scenario .. 32 Table 4. Summary of Maximum Benzene Predicted Annual Concentrations .. 33 Table 5. Summary of Maximum Predicted 24-Hour Concentrations at Discrete Receptor for Each Future Build Scenario .. 34 Table 6. Summary of Maximum Predicted 10-Minute Concentrations at Discrete Receptor for Each Future Build Scenario .. 35 Table 7. Maximum Predicted 24-Hour Vinyl Chloride Concentrations at Discrete Receptors for Each Future Build Scenario Preferred Leachate Management System.

5 35 Table 8. Maximum Calibrated[1] Predicted 10-Minute Hydrogen Sulphide Concentrations for Each Future Build Scenario .. 36 Table 9. Maximum Calibrated[1] Predicted Hydrogen Sulphide 24-Hour Concentrations for Each Future Build Scenario .. 36 Table 10. Maximum Predicted 24-Hour Benzene Concentrations for All Future Build Scenario .. 37 Table 11. Maximum Predicted Concentrations Off-site for Each Future Build Scenario Contingency Leachate Option .. 39 Table 12. Maximum Predicted Concentrations at Discrete Receptors for Each Future Build Scenario Contingency Leachate Management System .. 39 Table 13. Summary of Baseline and Future Build Maximum Predicted Concentrations Impacts at the Property Line .. 42 Table 14. Summary of Baseline and Future Build Maximum Predicted Concentrations Impacts at the Worst-Case Receptor .. 42 Table 15. Potential Effects, Proposed Mitigation and Compensation Measures, and Resulting Net Effects.

6 43 Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre Ap pe ndices Appendix A1. Existing Landfill Mound LFG Emission Rates Based on Scaling 2010 Flow Data Appendix A2. Preferred Alternative Landfill Mound and Active Stage Emission Rates Based on LANDGEM data Appendix A3. LFG-Fired Generators and Flares Emission Rates Appendix B. Contaminated Soil Stockpile Emission Rates Appendix C1. Comparison of Leachate Influent Characteristics All Measured Leachate Contaminants at Ottawa Landfill Appendix C2. Comparison of Leachate Influent Characteristics Detected and/or Matching Twin Creeks Contaminants Appendix C3. Raw Leachate Equalization Tank Emissions from Water9 Based on Concentrations in Raw Leachate Appendix C4. SBR Tank Emissions from Water9 Based on Concentrations in Raw Leachate Appendix C5. Effluent Equalization Tank Emissions from Water9 Based on Concentrations in Raw Leachate Appendix C6.

7 Sludge Tank Emissions from Water9 Based on Concentrations in Raw Leachate Appendix D1. Leachate Evaporator Sampling Summary Flow Characteristics Appendix D2. Leachate Evaporator Volatile Organic Compounds Average Results Appendix D3. Ammonia Average Results Appendix E. Supporting Information for Assessment of Negligibility Ottawa Landfill Leachate Management System Based on SBR System and Leachate Evaporator System Appendix F. MOE Memo Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre 1 1. Introduction This report documents the Landfill gas (LFG) volatile organic compounds (VOC) impact Assessment of the Preferred Alternative Landfill Footprint for the Environmental Assessment (EA) for a new Landfill footprint at Waste Management of Canada Corporation s (WM) west carleton Environmental Centre (WCEC). In the preceding Alternative Methods phase of the EA, a net effects analysis as well as a comparative evaluation of the four alternative Landfill footprint options were carried out in order to identify a Preferred Alternative Landfill Footprint.

8 The Preferred Alternative Landfill Footprint was determined to be Option #2 the North Footprint Option. The potential Environmental effects, mitigation or compensation measures to address the potential adverse Environmental effects, and the remaining net effects following the application of the mitigation or compensation measures were identified for the Preferred Alternative Landfill Footprint. The Preferred Alternative Landfill Footprint was refined based on stakeholder comments received and in order to further avoid or mitigate potential adverse Environmental effects, and is illustrated in Figure 1. A Facilities Characteristics Report (FCR) as well as a description of the ancillary facilities associated with the WCEC has been prepared so that potential Environmental effects and mitigation or compensation measures identified for the Preferred Alternative Landfill Footprint during the Alternative Methods phase of the EA could be more accurately defined, along with enhancement opportunities and approval requirements.

9 The discipline-specific work plans developed during the Terms of Reference (ToR) outlined how impacts associated with the Preferred Alternative Landfill Footprint would be assessed. The results of these assessments have been documented in the following 10 standalone Detailed Impact Assessment Reports: Atmospheric (Air Quality, Noise, Odour and Landfill Gas) Geology and Hydrogeology Surface Water Biology Archaeology Cultural Heritage Transportation Land Use Agriculture Socio-Economic (including Visual) Despite being standalone documents, there are; however, interrelationships between some of the reports, where the information discussed overlaps between similar disciplines. Examples of this include the following: Geology and Hydrogeology, Surface Water, and Biology (Aquatic Environment); and Land Use, Agricultural, and Socio-Economic. Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre 2 Figure 1.

10 Preferred Alternative Landfill Footprint Atmospheric Landfill Gas (VOC) Detailed Impact Assessment west carleton Environmental Centre 3 Description of the Preferred Alternative Landfill Footprint The southern half of the Preferred Alternative Landfill Footprint is on WM owned lands and the northern half is on lands that WM has options to purchase. A 100 metre (m) buffer is maintained between the north limit of the Preferred Footprint and the private lands to the north ( , lands which front onto Richardson Side Road) in accordance with Ontario Regulation (O. Reg.) 232/98, and an approximate 350 m buffer is maintained between the east limit of the footprint and Carp Road. A light industrial building ( , the Laurysen building) is situated in the eastern portion of WM optioned lands, which WM anticipates using for equipment storage/maintenance or waste diversion activities in the future.