Orillia, Ontario
Contaminants: BTEX in Groundwater
A leaking underground storage tank that had previously been removed had contaminated the groundwater with up to 50 ppm total BTEX (MOE Cleanup Criteria for total BTEX is 0.33 ppm for Industrial/Commercial Land Use for a Potable Groundwater Condition). Seventy injection wells were drilled through the asphalt surface in a grid-like pattern. Each well was initially injected with microbes, nutrients and an oxygen supply. Subsequent injections were performed on an as required basis. After 366 days an overall BTEX reduction of 81.0% was achieved. Non-potable groundwater condition has been achieved. Treatment is continuing to reach potable groundwater criteria for commercial/industrial sites.
Project Value: $137,000


Maple, On
Contaminants: Diesel in Soil
A leaking underground storage tank impacted soil, including an area underneath the foundation of two existing buildings. Total Light End Hydrocarbon concentrations of up to 3,300 ppm were found in the soil (MOE Cleanup Criteria is 100 ppm). Seven wells were placed on the site and injected with microbes, nutrients and an oxygen supply. Subsequent injections were performed on an as required basis. After 124 days of biotreatment an overall reduction in Total Light End Hydrocarbons of 99.9% was effected and the cleanup criteria was met.
Project Value: $7,800