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IN SITU THERMAL TREATMENT COMPLETION REPORT, FRONTIER FERTILIZER SUPERFUND SITE
U.S. EPA Region 3, 277 pp, 2015
This report documents the operation and post-operation data from in situ thermal treatment (ISTT) activities at the Frontier Fertilizer Superfund Site in Davis, California. Five contaminants of concern (COCs)—1,2-dibromo-3-chloropropane, 1,2-dibromoethane, 1,2-dichloropropane (DCP), 1,2,3-trichloropropane (TCP), and carbon tetrachloride (CCl4)—were identified in soil and groundwater at the former pesticide distribution facility. ISTT was applied from March 2011 to October 2012 to the source zone, which contained only the pesticide COCs (no CCl4). The objective was to remove a continuing source of groundwater contamination by heating the soil using electrical resistance heating to temperatures of 90 ± 10°C in the unsaturated zone <10 ft bgs, 95 ± 5°C in the unsaturated zone 10 ft bgs and deeper, and to the boiling point of water or more than 100°C in the saturated zone. When subsurface temperatures allowed, the treatment volume was sampled in August and September 2013. Calculations indicate >95% reduction in contaminant mass. ISTT removed a total of 79.4 lbs of COCs, mainly DCP (52.5 lbs) and TCP (23.0 lbs), from the source zone. http://yosemite.epa.gov/r9/sfund/r9sfdocw.nsf/3dc283e6c5d6056f88257426007417a2/fd82f49353eaa23388257eeb007515c5/$FILE/Final_FrontierFertilizer_ISTT_Report.pdf
This report documents the operation and post-operation data from in situ thermal treatment (ISTT) activities at the Frontier Fertilizer Superfund Site in Davis, California. Five contaminants of concern (COCs)—1,2-dibromo-3-chloropropane, 1,2-dibromoethane, 1,2-dichloropropane (DCP), 1,2,3-trichloropropane (TCP), and carbon tetrachloride (CCl4)—were identified in soil and groundwater at the former pesticide distribution facility. ISTT was applied from March 2011 to October 2012 to the source zone, which contained only the pesticide COCs (no CCl4). The objective was to remove a continuing source of groundwater contamination by heating the soil using electrical resistance heating to temperatures of 90 ± 10°C in the unsaturated zone <10 ft bgs, 95 ± 5°C in the unsaturated zone 10 ft bgs and deeper, and to the boiling point of water or more than 100°C in the saturated zone. When subsurface temperatures allowed, the treatment volume was sampled in August and September 2013. Calculations indicate >95% reduction in contaminant mass. ISTT removed a total of 79.4 lbs of COCs, mainly DCP (52.5 lbs) and TCP (23.0 lbs), from the source zone. http://yosemite.epa.gov/r9/sfund/r9sfdocw.nsf/3dc283e6c5d6056f8825742600
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