This consultation closes at 11:59 p.m. on:
May 2, 2026
Proposal summary
This proposal is for a new Environmental Compliance Approval (industrial sewage) for St. Marys Cement Inc. (Canada), located at the CBM McNally Pit at 4350 Concession 7 (Part of Lots 25, 26, and 27, Concession 2), in the Township of Puslinch, Ontario.
Location details
Site address
4350 Concession 7
Puslinch,
ON
Canada
Site location details
Part of Lots 25, 26, and 27, Concession 2
Site location map
The location pin reflects the approximate area where environmental activity is taking place.
View this location on a map opens link in a new windowProponent(s)
St. Marys Cement Inc. (Canada)
55 Industrial Street
Toronto,
ON
M4G 3W9
Canada
Proposal details
This proposal is for a new Environmental Compliance Approval (Industrial Sewage) for St. Marys Cement Inc. (Canada), located at the CBM McNally Pit at 4350 Concession 7 (Part of Lots 25, 26, and 27, Concession 2), in the Township of Puslinch, Ontario.
The proposed works are for the collection, transmission, treatment and disposal of wash water from an existing aggregate washing plant that has been in operation since 2011. The aggregate wash water is drawn from the McNally Pit below water table extraction area (source pond) and is pumped through the wash plant where it is used to remove native fine grain soils from the coarse aggregate. After washing, the slurry (water and soil) is returned to the McNally Pit Source Pond to settle the native fine grain soils (fine sand, silt and clay). The clarified water re-enters the Source Pond and is reused within the washing operations or re-enters the local groundwater flows system.
The Ministry may require monitoring of the industrial wastewater effluent discharge leaving the site.
Supporting materials
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135 St. Clair Avenue West
Floor 1
Toronto,
ON
M4V 1P5
Canada
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Client Services and Permissions Branch
135 St Clair Ave West
1st Floor
Toronto,
ON
M4V 1P5
Canada
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Contact
Client Services and Permissions Branch
135 St Clair Ave West
1st Floor
Toronto, ON
M4V 1P5
Canada