Mechanical treatment of sandy clay soils in winter conditions for the reduction of hydrocarbon contaminant concentrations
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The remediation of soils returns contaminated land to productive use and protects the environment and human health. As many as 60% of contaminated sites in Canada are impacted by Petroleum Hydrocarbons (PHCs) and many affected sites are in locations with cold climates. The effectiveness of mechanical rotation and aeration equipment for the treatment of sandy clay soils in winter conditions was studied at a former compressor station site (Lac St. Anne County, AB) impacted by benzene, toluene, ethylbenzene, and xylene and PHC Fraction F1. The treatment was achieved with a trommel which reduced contaminant levels to meet the Alberta Tier I soil remediation guidelines, with the strongest effect on benzene and ethylbenzene. Most of the treatments were successful when the soil was treated with the trommel twice in rapid succession in a time span of three days.
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