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1 Content Copy Of Original Ministry of the Environment and Climate Change Ministère de l Environnement et de l Action en matière de changement climatique Waste Management of Canada Corporation 117 Wentworth Court Brampton, Ontario L6T 5L4 Site Location: Twin Creeks Landfill Site 8039 Zion Line Warwick Township, County of Lambton N0M 2S0 AMENDED ENVIRONMENTAL COMPLIANCE APPROVAL NUMBER 9488-AMPH4Y Issue Date: July 6, 2017 You have applied under section 20.2 of Part II.1 of the Environmental Protection Act, R.S.O. 1990, c. E. 19 (Environmental Protection Act) for approval of: Three (3) enclosed flare systems, each having a maximum inlet capacity of 2.08 cubic metres per second of landfill gas, exhausting into the air at a maximum volumetric flow rate of 61.3 cubic metres per second through individual stacks, each having an exit diameter of 3.7 metres, extending 15.2 metres above grade; used to: incinerate the landfill gas from a landfill gas collection system; control the off-gases from the enclosed building housing the leachate treatment facility; and maintain a negative pressure on the leachate collection system on an as-needed basis; one (1) enclosed flare system having a maximum inlet capacity of 0.94 cubic metres per second of landfill gas, exhausting into the air at a maximum volumetric flow rate of 25.8 cubic metres per second through a stack having an exit diameter of 3.2 metres, extending 12.2 metres above grade; used to: incinerate the landfill gas from a landfill gas collection system; control the off-gases from the enclosed building housing the leachate treatment facility; and maintain a negative pressure on the leachate collection system on an as-needed basis; One (1) diesel fuel fired emergency generator rated at 1,000 kilowatts that will be used to provide back-up power for the landfill gas plant; exhausting into the air at a maximum volumetric flow rate of 3.56 cubic metres per second; having an exit diameter of 0.25 metre, extending 3.6 metres above grade; One (1) diesel fuel fired generator rated at 50 kilowatts that will be used to provide regular power to the leachate pumping system; exhausting into the air at a maximum volumetric flow rate of 0.24 cubic metres per second; having an exit diameter of 0.10 metre, extending 3.6 metres above grade; One (1) diesel fuel fired emergency generator rated at 250 kilowatts that will be used to provide

2 back-up power for the office buildings; exhausting into the air at a maximum volumetric flow rate of 0.97 cubic metres per second; having an exit diameter of 0.15 metre, extending 3.6 metres above grade; Two (2) passive exhaust louvres serving two (2) sequencing batch reactors (SBR) and two (2) aeration tanks; exhausting into the air individually at a maximum volumetric flow rate of 1.96 cubic metres per second; each having an exit dimension of 1.22 x 1.22 metres, extending 2.13 metres above grade; One (1) process exhaust fan serving the reverse osmosis system area; exhausting into the air at a maximum volumetric flow rate of 1.71 cubic metres per second; having an exit dimension of 0.45 x 0.45 metres, extending 4.0 metres above grade; One (1) exhaust fan serving slurry dryer; exhausting into the air at a maximum volumetric flow rate of 0.24 cubic metres per second; having an exit diameter of 0.3 metre, extending 5.0 metres above grade; all in accordance with the Application for an Approval, dated February 15, 2017 and signed by Reid Cleland of the Company and all information and documentation associated with the application including ESDM Report prepared by RWDI AIR Inc. dated February 15, 2017 and signed by Brad Bergeron; and updates provided by Brad Bergeron of RWDI AIR Inc. on May 10, 18, 24 and 26, For the purpose of this environmental compliance approval, the following definitions apply: 1. "Acoustic Audit" means an investigative procedure consisting of measurements of all noise emissions due to the operation of the Facility, assessed in comparison to the performance limits for the Facility regarding noise emissions, completed in accordance with the procedures set in Publication NPC-103 and reported in accordance with Publication NPC "Acoustic Audit Report" means a report presenting the results of an Acoustic Audit, prepared in accordance with Publication NPC "Acoustical Consultant" means a person currently active in the field of environmental acoustics and noise/vibration control, who is familiar with Ministry noise guidelines and procedures and has a combination of formal university education, training and experience necessary to assess noise emissions from a Facility. 4. "CEM System" means the continuous monitoring and recording system, one for each of the flare system, used to optimize the operation of the flare systems, as described in this Approval, including Schedule "A", to the extent approved by this Approval. 5. "Approval" means this Environmental Compliance Approval, including the application and supporting documentation listed above. 6. "Company" means Waste Management of Canada Corporation that is responsible for the construction or operation of the Facility and includes any successors and assigns. 7. "Director" means a person appointed for the purpose of section 20.3 of the EPA by the Minister pursuant to section 5 of the EPA. 8. "District Manager" means the District Manager of the appropriate local district office of the Ministry, where the Facility is geographically located. 9. "EPA" means the Environmental Protection Act, R.S.O. 1990, c.e.19, as amended. 10. "Equipment" means the equipment described in the Company's application, this Approval and in

3 the supporting documentation submitted with the application, to the extent approved by this Approval. 11. "Facility" means the entire operation located on the property where the Equipment is located. 12. "Independent Acoustical Consultant" means an Acoustical Consultant not representing the Company, and not involved in the noise impact assessment or the design/implementation of noise control measures for the Facility/Equipment. The Independent Acoustical Consultant shall not be retained by the consultant involved in the noise impact assessment or the design/implementation of noise control measures for the Facility/Equipment. 13. "Manager" means the Manager, Technology Standards Section, Standards Development Branch of the Ministry, or any other person who represents and carries out the duties of the Manager, as those duties relate to the conditions of this Approval. 14. "Manual" means a document or a set of documents that provide written instructions to staff of the Company. 15. "Pre-Test Information" means the information outlined in Section 1. of the Source Testing Code. 16. "Publication NPC-103" means Publication NPC-103 of the Model Municipal Noise Control By- Law, Final Report, August, 1978, as amended. 17. "Publication NPC-205" means the Ministry Publication NPC-205, "Sound Level Limits for Stationary Sources in Class 1 & 2 Areas (Urban)", October, 1995, as amended. 18. "Publication NPC-233" means Publication NPC-233, Information to be Submitted for Approval of Stationary Sources of Sound, October 1995, as amended. 19. "Sensitive Receptor" means any location where routine or normal activities occurring at reasonably expected times would experience adverse effect(s) from odour discharges from the Facility, including one or a combination of: 1. private residences or public facilities where people sleep (e.g. single and multi-unit dwellings, nursing homes, hospitals, trailer parks, camping grounds, etc.), 2. institutional facilities (e.g.: schools, places of worship, community centres, day care centres, recreational centres, etc.), 3. outdoor public recreational areas (e.g.: trailer parks, play grounds, picnic areas, etc.), and 4. other outdoor public areas where there are continuous human activities (e.g.: commercial plazas and office buildings). 20. "Schedules" means the following schedules attached to the Approval and forming part of the Approval namely: Schedule A - Continuous Monitoring and Recording System for Temperature Schedule B - Source Testing Requirement Schedule C - Procedures for Calculation of 10-minute Average Concentration of Odour. 21. "Site" means the Twin Creeks Landfill Site and lands owned by the Company described as: 8039 Zion Line, R.R. #4, Watford Lots 19 and 20, Concession 3 and Lots 20 and 21, Concession 4, SER, Reference Plan 25R-9125 Township of Warwick, County Of Lambton, Ontario N0M 2S "Source Testing" means sampling and testing to measure emissions resulting from operating the Equipment under process conditions which yield the worst case emissions within the approved operating range of the Facility and satisfies paragraph 1 of subsection 11(1) of O. Reg. 419/05.

4 23. "Source Testing Code" means the Ontario Source Testing Code, dated June 2010, prepared by the Ministry, as amended. You are hereby notified that this environmental compliance approval is issued to you subject to the terms and conditions outlined below: TERMS AND CONDITIONS 1. NOTIFICATION 1. The Company shall notify the District Manager in writing at least one (1) month prior to the expected date of installation of the second, third and fourth enclosed flare system in the Facility. 2. PERFORMANCE 1. The Company shall, at all times, ensure that the noise emissions from the Facility comply with the limits set in Ministry Publication NPC The Company shall restrict the testing of the two (2) emergency diesel generators (1,000 kilowatts and 250 kilowatts) to a maximum of 30 minutes per hour each during the daytime period between 07:00 and 19:00 hours. 3. The Company shall operate all four enclosed flare systems in such a manner that a minimum temperature, as recorded by the CEM System, shall be 875 degrees Celsius at a point representing a minimum retention time of 0.7 second, at all times when the landfill gas incineration is in progress. 3. OPERATION AND MAINTENANCE 1. The Company shall ensure that the Equipment, including the CEM System, is properly operated and maintained at all times. The Company shall: 2. prepare, not later than three (3) months after the date of this Approval, a Manual outlining the operating procedures and a maintenance program for the Equipment. These operating procedures and the maintenance program in the Manual shall be updated as necessary. The Manual shall include, as a minimum, the following: 3. routine operating and maintenance procedures in accordance with good engineering practices and as recommended by the Equipment and the CEM System suppliers; 4. the calibration procedures of the CEM System; 5. emergency procedures and procedures to prevent upset conditions; 6. the operator training which is to be provided by qualified and experienced individuals, for example, staff associated with the Equipment and the CEM System suppliers or personnel with equivalent qualification; 7. the procedures for optimizing the operation of the Equipment to minimize emissions from the Equipment; 8. the periodic, at a minimum weekly, inspection of the Equipment which is to be conducted by individuals trained with the Equipment; and timetables for work to be carried out; 9. procedures for any record keeping activities relating to operation and maintenance of the Equipment, including but not limited to the quantity and quality of the landfill gas collected and fed to the Equipment for incineration; 10. procedures to record process upsets/upset conditions and the remedial actions taken to respond to the upsets;

5 11. all appropriate measures to minimize noise, dust and odorous emissions from all potential sources; 12. the procedures for recording and responding to complaints regarding the operation of the Equipment; 13. implement the procedures of the Manual. 4. ACOUSTIC AUDIT 1. The Company shall carry out Acoustic Audit measurements on the actual noise emissions due to the operation of the Facility. The: a. shall carry out Acoustic Audit measurements in accordance with the procedures in Publication NPC-103; b. shall submit an Acoustic Audit Report on the results of the Acoustic Audit, prepared by an Independent Acoustical Consultant, in accordance with the requirements of Publication NPC-233, to the District Manager and the Director not later than three (3) months after the commencement of operation of each of the proposed three (3) flare systems in the Facility. 2. The Director: a. may not accept the results of the Acoustic Audit if the requirements of Publication NPC- 233 were not followed; b. may require the Company to repeat the Acoustic Audit if the results of the Acoustic Audit are found unacceptable to the Director. 5. RECORD RETENTION 1. The Company shall retain, for a minimum of two (2) years from the date of their creation, all records and information related to or resulting from the recording activities required by this Approval, and make these records available for review by staff of the Ministry upon request. The Company shall retain: 2. all records on the maintenance, repair and inspection of the Equipment and the CEM System; 3. all records produced by the CEM System; 4. all records on the quality and quantity of landfill gas collected and fed to the Equipment; 5. all records on the ambient air monitoring; 6. all records generated in the Acoustic Audit measurements; 7. all records of process upsets/upset conditions and remedial actions taken to respond to the upsets; 8. all records of any environmental complaints; including: 9. a description, time and date of each incident to which the complaint relates, 10. wind direction at the time of the incident to which the complaint relates, and 11. a description of the measures taken to address the cause of the incident to which the complaint relates and to prevent a similar occurrence in the future. 6. NOTIFICATION OF COMPLAINTS 1. The Company shall notify the District Manager, in writing, of each environmental complaint within two (2) business days of the complaint. The notification shall include: 2. this Approval number; 3. a description of the nature of the complaint; 4. the time and date of the incident to which the complaint relates; 5. a description of the measures taken to address the cause of the incident to which the complaint relates and to prevent a similar occurrence in the future. 7. CONSULTATION 1. During the process of submission of an application to amend any Approval for the Site, the Company shall: 2. discuss with Walpole Island First Nation (WIFN), Township of Warwick and Warwick Public

6 Liaison Committee (WPLC) the proposed application prior to submission of the application to the Director; 3. provide the same documents to WIFN, Township of Warwick and WPLC that are provided to the Director in respect of the amendment; and 4. provide the Director with a statement indicating how WIFN, Township of Warwick and WPLC's comments were considered by the Company before it submitted the application to the Ministry. 8. SOURCE TESTING 1. The Company shall monitor the emissions from the operation of the Facility as follows: a. The Company shall perform Source Testing for the sources and contaminants outlined in Schedule B. b. The Company shall submit, within the three (3) months following the date of this Approval, to the Manager a test protocol, including the Pre-Test Information for the Source Testing required by the Source Testing Code. c. The Company shall finalize the test protocol in consultation with the Manager. d. The Company shall not commence the Source Testing until the Manager has accepted the test protocol. e. The Company shall notify the District Manager and the Manager in writing of the location, date and time of any impending Source Testing required by this Approval, at least fifteen (15) business days prior to the Source Testing or as approved by the Manager. f. The Company shall complete the Source Testing within three (3) months after the commencement of the leachate treatment facility. The source testing will be repeated within 90 days of the start of each new phase as outlined in Table 6.1 of the Design and Operations Plan for the Site. 9. REPORT ON SOURCE TESTING 1. The Company shall submit a report on the Source Testing to the District Manager and the Manager, as stated in the test protocol, but no later than two (2) months after completing the Source Testing. The report shall be in the format described in the Source Testing Code, and shall also include: a. an executive summary including the results from the Source Testing; b. records of all operating conditions including any upset conditions during the Source Testing; and c. the results of dispersion calculations using the maximum emission rate for odour for the Equipment, indicating the maximum concentration of the odour, 10 minute-average, calculated in accordance with the procedures outlined in Schedule C, at the nearby Sensitive Receptors and the yearly frequency of exceedance of 1 odour unit at the Sensitive Receptors. 10. REFUSAL OF SOURCE TESTING 1. The Director may not accept the results of the Source Testing if: a. the Source Testing Code or the requirements of the Manager were not followed; or b. the Company did not notify the District Manager and the Manager of the Source Testing; or c. the Company failed to provide a complete report on the Source Testing. 2. If the Director does not accept the results of the Source Testing, the Director may require retesting. SCHEDULE "A" PARAMETER: Temperature LOCATION: The sample point for the continuous temperature monitoring and recording system shall be shall be

7 installed in the combustion chamber of each flare where the minimum retention time of the combustion gases at a minimum temperature of 875 degrees Celsius for at least 0.7 second is achieved. PERFORMANCE: The Continuous Temperature Monitor shall meet the following minimum performance specifications for the following parameters. PARAMETER SPECIFICATION 1. Type: shielded "K" type thermocouple or equivalent 2. Accuracy: percent of the minimum gas temperature 3. Response Time (95%): 60 sec. (max) 4. Operating Range (Full Scale): 1.5 times approval limit 5. Standard Tolerance: ±2.2 ºC or ±0.75% 6. Resolution: 0.1 ºC 7. Calibration: Per manufacturer s recommendations RECORDER: The recorder must be capable of registering continuously the measurement of the monitor without a significant loss of accuracy and with a time resolution of 5 minutes or better. RELIABILITY: The monitor shall be operated and maintained so that accurate data is obtained during a minimum of 90 percent of the time for each calendar quarter during the first full year of operation, and 95 percent, thereafter when the enclosed flare systems are in operation. SCHEDULE "B" Source ID L3 L4 EF-2 SD-1 Description Exhaust serving sequencing a batch reactor (SBR) and an aeration tank Exhaust serving sequencing a batch reactor (SBR) and an aeration tank Exhaust serving reverse osmosis system area Exhaust serving slurry dryer Source Testing Requirement Test Parameters Odour, hydrogen sulfide, total Mercaptans and a complete scan for volatile organic compounds Odour, hydrogen sulfide, total Mercaptans and a complete scan for volatile organic compounds Odour, hydrogen sulfide, total Mercaptans and a complete scan for volatile organic compounds Odour, hydrogen sulfide, total Mercaptans and a complete scan for volatile organic compounds SCHEDULE "C" Procedures for the Calculation of 10-minute Average Concentration of Odour 1. The one-hour average concentration of odour at the Point of Impingement and at the most impacted Sensitive Receptor can be calculated using the Procedure described as follows: 1. Calculate one-hour average concentration of odour at the Point of Impingement and at the most impacted Sensitive Receptor, employing the AERMOD atmospheric dispersion model employing at least five (5) years of hourly local meteorological data and provide results as individual one- hour odour concentrations;

8 2. Convert each of the one-hour average concentrations predicted over the five (5) years of hourly local meteorological data to a 10-minute average concentration using the One-hour Average to 10-Minute Average Conversion described below; 3. Present the 10-Minute Average concentrations predicted to occur over a five (5) year period at the Point of Impingement and at the most impacted Sensitive Receptor in a histogram. The maximum 10-minute average concentration of odour at the Sensitive Receptor will be considered to be the maximum odour concentration at the most impacted Sensitive Receptor that occurs and is represented in the histogram; and 2. For AERMOD, use the following formula to convert one-hour average Point of Impingement concentration to 10-minute average Point of Impingement concentration: The reasons for the imposition of these terms and conditions are as follows: 1. Condition No. 1 is included to assist the Ministry with the inspection of the Facility so that the environmental impact and subsequent compliance with the EPA, the regulations and this Approval can be verified. 2. Condition Nos. 2.1 and 2.3 are included to provide the minimum performance requirements considered necessary to prevent an adverse effect resulting from the operation of the Facility. 3. Condition No. 2.2 is included to ensure that the operation of the two (2) emergency diesel generators, excluding emergency situations, is not extended beyond the specified hours to prevent an adverse effect resulting from the operation of the Equipment. 4. Condition No. 3 is included to emphasize that the Equipment including the CEM System must be maintained and operated according to a procedure that will result in compliance with the EPA, the regulations and this Approval. 5. Condition No. 4 is included to require the Company to gather accurate information and submit an Acoustic Audit Report in accordance with procedures set in the Ministry's noise guidelines, so that the environmental impact and subsequent compliance with this Approval can be verified. 6. Condition No. 5 is included to require the Company to keep records and to provide information to staff of the Ministry so that compliance with the EPA, the regulations and this Approval can be verified. 7. Condition No. 6 is included to require the Company to notify staff of the Ministry so as to assist the Ministry with the review of the Facility's compliance. 8. Condition No. 7 is included in order to ensure that consultation with Walpole Island First Nation (WIFN), Township of Warwick and Warwick Public Liaison Committee (WPLC) is undertaken during the submission of any application to amend any Approval required by the Ministry. 9. Condition Nos. 8 to 10 are included to require the Company to gather accurate information so that the environmental impact and subsequent compliance with the EPA, the regulations and this Approval can be verified. Upon issuance of the environmental compliance approval, I hereby revoke Approval No(s) VXJ5G issued on November 10, In accordance with Section 139 of the Environmental Protection Act, you may by written Notice served upon me, the Environmental Review Tribunal and in accordance with Section 47 of the Environmental Bill of Rights, 1993, S.O. 1993, c. 28 (Environmental Bill of Rights), the Environmental Commissioner,

9 within 15 days after receipt of this Notice, require a hearing by the Tribunal. The Environmental Commissioner will place notice of your appeal on the Environmental Registry. Section 142 of the Environmental Protection Act provides that the Notice requiring the hearing shall state: a. The portions of the environmental compliance approval or each term or condition in the environmental compliance approval in respect of which the hearing is required, and; b. The grounds on which you intend to rely at the hearing in relation to each portion appealed. Pursuant to subsection 139(3) of the Environmental Protection Act, a hearing may not be required with respect to any terms and conditions in this environmental compliance approval, if the terms and conditions are substantially the same as those contained in an approval that is amended or revoked by this environmental compliance approval. The Notice should also include: 1. The name of the appellant; 2. The address of the appellant; 3. The environmental compliance approval number; 4. The date of the environmental compliance approval; 5. The name of the Director, and; 6. The municipality or municipalities within which the project is to be engaged in. And the Notice should be signed and dated by the appellant. This Notice must be served upon: The Secretary* Environmental Review Tribunal 655 Bay Street, Suite 1500 Toronto, Ontario M5G 1E5 AND The Environmental Commissioner 1075 Bay Street, Suite 605 Toronto, Ontario M5S 2B1 AND The Director appointed for the purposes of Part II.1 of the Environmental Protection Act Ministry of the Environment and Climate Change 135 St. Clair Avenue West, 1st Floor Toronto, Ontario M4V 1P5 * Further information on the Environmental Review Tribunal s requirements for an appeal can be obtained directly from the Tribunal at: Tel: (416) , Fax: (416) or This instrument is subject to Section 38 of the Environmental Bill of Rights, 1993, that allows residents of Ontario to seek leave to appeal the decision on this instrument. Residents of Ontario may seek leave to appeal within 15 days from the date this decision is placed on the Environmental Registry. By accessing the Environmental Registry at you can determine when the leave to appeal period ends. The above noted activity is approved under s.20.3 of Part II.1 of the Environmental Protection Act. DATED AT TORONTO this 6th day of July, 2017 Rudolf Wan, P.Eng.

10 BS/ c: District Manager, MOECC Sarnia Brad Bergeron, RWDI AIR Inc. Director appointed for the purposes of Part II.1 of the Environmental Protection Act