– Rehabilitation of Soils and Groundwater Contaminated with Chlorinated Solvents – Case Study


Perchlorethylene (PCE) is a chlorinated solvent commonly used in the dry cleaning industry. Significant PCE contamination has been identified in a site in the Greater Montreal Area.
Enutech has been mandated to carry out the necessary in situ rehabilitation work. The difficulty of rehabilitation was that the contamination was deep. The contaminated groundwater plume had a length of more than 200 meters and 3100 kg of pure PCE was spilled into the site soils. Contaminants in soils and groundwater were PCE, TCE, DCE. The soil contamination was under a parking lot and covered an area of 550 square meters.
Injection series of a biogeochemical formulation – developed specifically by Enutech’s R & D department – were carried out in the site soils to create optimal conditions for the reductive dechlorination reaction of PCE.