SAMBAULT LANDFILL REMEDIATION

Since 2010, PSPC has been managing the former Sambault landfill located in Saint-Isidore-de-Laprairie, Québec. This site,
approximately 150,000 square meters, has hosted illegal landfill activities of various wastes between 1965 and 1986 which have caused contamination of soil, groundwater, and surface water beyond the applicable values for different families of contaminants.

This situation prompted the urgent need for action and a remediation program was developed based on several environmental studies, risk analysis, the development and the evaluation of remediation scenarios, and implementation through a design-build approach.

Golder carried out this hybrid approach remediation program which consisted in the profiling and waterproofing work on the waste cells, the installation of a hydraulic containment system and the design and construction of a groundwater treatment plant using the electrocoagulation technology. This innovative technology choice, made it possible to treat the wide variety of contaminants present in groundwater while reducing the quantities of media used and by-products generated, thus controlling installation and operating costs.

The 24/7 operation of the systems is currently protecting the water supply of the local population, and the agricultural neighborhood for whom irrigation is essential, from contamination by chlorinated solvents. The landfill, once a brownfield site, has become a controlled green space integrated into the landscape.