Assessment of in situ thermal treatment for chlorinated organic source zones |
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| Authors: | Michael J Truex James M Gillie Jefferey G Powers Kira P Lynch |
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| Institution: | 1. Pacific Northwest National Laboratory;2. Professional Civil Engineer, Versar, Inc.;3. Seattle District, U.S. Army Corps of Engineers.;4. Senior Remedial Project Manager, U.S. Environmental Protection Agency. |
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| Abstract: | The East Gate Disposal Yard (EGDY) at Fort Lewis is the source of a large trichloroethene (TCE) plume at this military installation. Source reduction using thermal treatment was applied using electrical resistance heating. A total of about 5,800 kg of TCE‐equivalent volatile organic compounds (VOCs; TCE and dichloroethene) was extracted during thermal treatment of the three zones selected for source reduction. Pretreatment groundwater TCE concentrations were measured up to 100 ppm. Posttreatment groundwater TCE concentrations within the treatment zones averaged less than 100 ppb. Posttreatment soil TCE concentrations decreased by over 96 percent compared to pretreatment soil concentrations. The overall contaminant flux from EGDY was reduced by an estimated 60 to 90 percent by the source reduction effort. The traditional and new techniques for site characterization and remediation performance monitoring applied at EGDY provide insight for installing, operating, monitoring, and assessing thermal treatment. © 2009 Wiley Periodicals, Inc. |
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