Stella-Jones Inc. - Environmental Compliance Approval (sewage)

This proposal is for an amendment to the existing Environmental Compliance Approval No. 3490-D2NK93 to support stormwater treatment system upgrades to the existing stormwater management (SWM) Ponds A servicing the Pressure Treated Wood Facility located at 201 Wellington Street in Shelburne, Ontario.

The proposed stormwater treatment system will consist of the following components of SWM works: collection, storage and treatment systems. There are no changes proposed to the SWM Works B.

The facility produces pressure treated wood products. After wood preservation, the treated wood is covered with an impervious wrap and then stored outdoors in stacks at the south and west portions of the Site. After a rainstorm event, the runoff is directed to SWM Works A. The proposed stormwater treatment upgrades are focused on treating the copper in the stormwater collected in SWM Works A prior to discharge into the municipal Besley Drain. Currently, the wood preservation process uses a combination of rainfall runoff and domestic water to dilute a concentration of colourant, and Health Canada approved biocides and preservatives (called MCA and CA-B) to create the Wood Preservation Liquid (WPL), required to generate the final treated wood products.

Following the application of the WPL process, any excess WPL drippings from the preserved bundles or stacks of wood products are collected within a contained drip pad area inside the wood preservation building and recovered for re-use in the system. Once dry, the treated wood bundles are wrapped with an impervious wrap and then relocated and stacked for storage on the asphalt to the west and south of the wood preservation building prior to being shipped offsite to wholesale and retail lumber stores. No wood is wrapped and moved outside until it is drip dry, and the exterior of the lumber stack is dry to the touch. While stored outside, the wrapped bundles may release minor volumes of excess WPL. During precipitation events, the WPL mixes with the runoff water and is captured by an internal storm sewer network that outlets to SWM Works A. There are no wrapped bundles stored on the SWM Works B catchment and no historic traces of copper in the SWM Works B Effluent.