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Pioneering fast-track remediation of VOC-contaminated soil at proposed school site using treatment cells
By Ulf Lindmark, PE, BCEE and Steve Morrill, PE
In September 2008, Coffey Environments (CE) was retained by the Los Angeles Unified School District (LAUSD) to implement the remedial action plan for a proposed 2.5-hectare elementary school site that would provide 950 much-needed seats in a commercial/residential area just south of downtown Los Angeles, California, USA.
The site had been rigorously screened and evaluated through a process that included Phase I and II site assessments, a preliminary endangerment assessment (PEA), a remedial action plan (RAP) and remedial design. Chemicals of concern at the site included tetrachloroethene (PCE) and trichloroethene (TCE) from an on-site source. Volatile organic compounds (VOCs) were detected only in soil gas, and not in soil samples.
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