Background
During the construction of a new exhibition park on a former brownfield site, soils impacted with 47 different contaminants were excavated and disposed of on an adjacent site located near a river and residential area. The municipality was concerned with the health and safety of neighbouring residents, as well as the environmental threat to the nearby river.

Solution
An ex situ Biopile process coupled with a biofilter for the treatment of gas effluents made it possible for Biogenie to lower the average concentration of the 47 contaminants by 93% within 16 weeks of treatment. Hence, 9 weeks less than the deadline which had been originally established. In addition, the process attained a total residual concentration of less than 15 ppm, well below the 100 ppm objective that had been established by local administrative authorities.

Services

• Design and construction of a treatment area;
• Ex situ Biopile treatment of 22,000 tons of soil contaminated with chlorinated solvents, mainly chloronitrobenzenes and chloroanilines, as well as nitrophenols;
• Restoration of the site to its original state.

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