Waste Management of Canada Corporation - Environmental Compliance Approval (waste)

This proposal is to amend the existing Environmental Compliance Approval (ECA) No. A032203 for the Twin Creeks Environmental Centre located in Watford, Ontario. The Twin Creeks landfill is a 101.8 hectares area within a total site area of 301 hectares. The landfill is permitted to receive a maximum of 1,400,000 tonnes of non-hazardous waste annually and has approved capacity of 26,508,000 cubic meters. The facility has an Ontario service area with approved operating hours of 7 am to 7 pm, Monday to Saturday.

Environmental Compliance Approval (ECA) No. A032203, Condition 8.6(1)(d) requires WM to prepare a Leachate Treatment Facility Study (LTFS) at least seven years prior to closure of the Twin Creeks Environmental Centre (TCEC) landfill. Based on the current remaining capacity, and approved annual waste volumes, it is projected that the landfill will have approximately seven years of capacity remaining by mid-2024. This will require that the LTFS be prepared within this same timeframe. WM is proposing to amend this ECA condition due to proposed changes to the operational plans and life for the TCEC.

WM has approval for a leachate treatment facility (LTF) at the site (under ECA No. 3506-7M5PU3) which is significantly oversized relative to actual leachate generation being observed at the site and the LTF has not been constructed. WM is continuing to assess the appropriateness of the currently approved LTF design and operations plan.

The TCEC has a viable strategy in place to manage leachate that is being generated at the site. There is no immediate need to have a leachate treatment facility operating on-site at the TCEC.