Background
Following the successful completion of Phase I, which involved the treatment of 120,000 tons of contaminated soil, Biogenie was retained to treat an additional 100,000 tons originating from a second area of the Channel Tunnel Rail Link Stratford construction site in London’s suburb. In Phase II, contaminants of concern consisted of Polycyclic Aromatic Hydrocarbons (PAHs), the legacy of operations from an oil-powered manufactured gas plant, and to a lesser extent of Diesel Range Organics (DRO) resulting from locomotive refueling activities.

Solution
Biogenie proposed an ex situ Biopile process for the treatment of the PAH and DRO-contaminated soil. Treatment was carried out over a 12-week period and lowered the initial PAH and DRO concentrations to well below the reuse criteria of 200 mg/kg and 2,000 mg/kg, respectively.
 

Services

• Characterization study of the contaminated soil;
• Treatability study for the PAH-contaminated soil in order to confirm the viability of a biological treatment solution and to determine optimal treatment parameters;
• Design, construction and operation of an on-site ex situ Biopile process for the treatment of 100,000 tons of soil;
• Validation sampling;
• Production of reports.

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