Southgate Renewables GP Inc., as general partner for and on behalf of Southgate Renewables LP - Environmental Compliance Approval (waste)

This proposal is for an amendment to the multimedia Environmental Compliance Approval No. 1984-BD9NBD for Southgate Renewables GP Inc., as general partner for and on behalf of Southgate Renewables LP.

The anaerobic digester facility is located at 100 Eco-Park Way, Township of Southgate, Grey County, Ontario, on a 4-hectare area site. The facility will be using organic residuals from source separated organics, industrial, commercial, institutional commercial and industrial food waste materials, and a blend of agricultural materials such as (energy crops) silage, stover, culled material from vegetable and tuber crops and animal manure to produce renewable natural gas for injection into the natural gas grid, and digestate (organic fertilizer) crop nutrients to local farms.

The service area will be the Province of Ontario and the States of New York, Michigan, and Ohio. The maximum daily waste received will be 700 tonnes of non-hazardous waste and 700 cubic metres of other liquid waste, and the maximum on-site storage capacity will be 400 tonnes of non-hazardous solid waste and 480 cubic metres of other liquid waste.

The facility is currently permitted to process up to 73,000 tonnes of waste annually. The anaerobic digester will operate 24 hours a day, 7 days a week, and the hours of operation for the reception of organic residuals at the facility will be Monday to Friday from 6 am to 10 pm, and Saturday from 6 am to 4 pm.

This amendment requests approval for the revised facility layout, which will include minor process changes made necessary by the acquisition of additional land adjacent to the original site in 2022. These changes include:

• a biofilter for improved odour control
• changes in tank and combined heat and power sizes
• the use of process water and double membrane roofs
• the addition of boilers