Victoria, BC
Contaminants: Diesel in Soil (PHCs F2/F3)
A leaking diesel storage tank in the basement of a residential home impacted an area directly under the house of approximately 50 square meters. Total Extractable Hydrocarbon (TEH) concentrations varied from 2,700 to 119,000 ppm (BC MOE Contaminated Sites Regulations for TEH in soil is 1,000 ppm). Inside the dwelling's crawl space 36 auger holes were placed in a grid-like pattern, and 7 holes were hand dug outside the dwelling's crawl space. After 190 days of biotreatment a total TEH reduction of 99.5% was effected and BC MOE Criteria for residential sites was achieved.
Project Value: $49,000

Hamilton, On
Contaminants: Creosote in Soil (PAHs, PHCs F3/F4)
Soil was contaminated with tert-butyl para-cresol (tBPC) at concentrations up to 350 ppm (MOE Cleanup Criteria is 40 ppm) from a former food preserving facility located in a residential area. The contaminated soil was placed in 6 aerated engineered biocells and treated with bioproducts and oxygen during biopile construction. The biocells were constructed in October 1996 and have operated through 2 winters. Subsequent re-applications of bioproducts, oxygen and moisture were performed as required. The biocells were continually aerated, monitored and frequently sampled throughout treatment. After 565 days of treatment 2 biocells have attained MOE Cleanup Criteria while the other 4 biocells will require further treatment. To date an overall reduction in tBPC of 69.9% has been effected.