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Borden, R.C.
ESTCP Project ER-201581, 151 pp, 2017

Enhanced reductive dechlorination (ERD) with emulsified vegetable oil (EVO) has been used at hundreds of sites to remediate chlorinated solvents, chromate, uranium, perchlorate, and explosive constituents. The process commonly involves injecting EVO, nutrients, pH buffer or base, and microbial cultures to adjust biogeochemical conditions in the immediate vicinity of the contaminant(s). Field, lab, and design evaluations of EVO use for TCE contamination at two sites at the former Naval Training Center Orlando are presented in this report. Although the remediation systems at both sites initially achieved substantial reductions in TCE concentrations, concentrations of cDCE and VC increased and remain elevated in some wells due to TCE degradation. Results from the project evaluations were used to identify the reasons for the ERD systems' failure to meet cleanup goals and to develop new approaches and procedures to improve performance. https://www.serdp-estcp.org/content/download/46673/436329/file/ER-201581%20Final%20Report.pdf

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