St. Bruno, Québec: Thermal Treatment at a Former Dry Cleaner

GEO's St. Bruno case study describes thermal treatment of PCE, its degradation products, and diesel-range petroleum hydrocarbons at a former dry cleaner in Québec. The project was intended to support redevelopment and address vapor-intrusion concerns for nearby businesses.

Thermal remediation installation at St. Bruno, Quebec.

The system included 33 thermal conduction heater wells extending to a maximum depth of 25 feet and 18 multiphase extraction wells. The source lists a treatment volume of 2,800 cubic yards, target temperatures of 80–100°C, and 135 days of heating.

The case study reports achievement of the remediation goal after approximately five months of operation. It describes greater than 99% reduction in PCE by mass on an arithmetic-mean basis, elimination of diesel-related light non-aqueous phase liquid, and final soil concentrations of PCE and chlorinated VOCs below 5 mg/kg.

These are reported remediation results. The source does not separately quantify post-treatment indoor-air improvements or broader community-health outcomes.