G. Tackaberry & Sons Construction Company Limited - Environmental Compliance Approval (sewage)

The proposal is for a new Environmental Compliance Approval for industrial sewage treatment works for G. Tackaberry & Sons Construction Company Limited, to serve Sweet's Pit for an existing mobile aggregate wash water facility, located at 3299 Highway 32 in the Township of Leeds and the Thousand Islands, Ontario.

The wash plant consists of a source water pond approximately 60 metres wide and 110 metres long. The depth of the pond varies between 4.5 metres to 5.5 metres. Intake water for the wash plant is taken for aggregate washing as necessary in accordance with the rates and durations specified on Permit to Take Water No. 4360-ACUNG2 for the Sweet’s Pit.

The maximum water taking rate for the mobile wash plant is 7,855,200 liters per day for a maximum of 292 days per year. The water from the mobile wash plant is returned to the source pond via a settling channel approximately 45 metres long and 7 metres wide.

Flow within the settling channel is slowed by a gabion stone weir located at the point where the water re-enters the source water pond. The mobile wash plant operates as a closed-loop system with no direct discharge to the environment.