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STATISTICAL SAMPLING APPROACH FOR CLOSING A SOIL VENTING SITE
Citation:
Simon*, M A., V. A. Lancaster, AND J. E. Hicks. STATISTICAL SAMPLING APPROACH FOR CLOSING A SOIL VENTING SITE. Third International Battelle Conference on Remediation of Chlorinated and Recalcitrant Compounds, Monterey, CA, 5/20-23/02.
Description:
The USEPA allowed the Performing Parties (PPs) to perform a soil vapor extraction process to a site contaminated by volatile organic compounds (VOC), contingent upon the process reducing the VOC concentrations in the soil by 75% within one year. An innovative injection-extraction soil venting (ISVE) project has been in operation at this NY state solvent-recycling site since 1995. Multiple wells were systematically switched from extraction to injection and back again. The mass removal rate of VOC was higher than projections of what the removal rate would have been had the operation been performed under extraction alone. A statistical design for the collection of soil samples were implemented for sampling prior to the start of the project, in October 1997. The statistical methodology for calculating the VOC concentration reduction is discussed in this paper. In addition to statistical analyses, three-dimensional interpolation of the data demonstrated a 75% reduction in total VOC concentration and the project was allowed to continue.