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i <br /> III- Soil Remediation 1 Information ' <br /> S011 remediation method(s) Excavation - Uncontrolled Aeration <br /> ' Volume treated and/or removed 300 cubic yards removed <br /> Contaminated soil disposal site Aerated at City Corp. Yard, 1465 S. Lincoln, Stockton , CA <br /> If contamination is remaining, describe concentration range and volume (cubic yards or meters) <br /> Approximately 57 - 63 cubic yards, cone. range ND - 7800 ppm TPHd, ND - 8300 ppm TPHg <br /> Table III - Maximum documented contaminant <br /> and <br /> ciiatratioas to sal before and after cleanup <br /> ' Coutaminant Method Before After Depth Contaminant Method Before After Depth <br /> used (mgfkg) (mg/kg) (ft) used (mg/kg) (mg/kg) (ft) <br /> TPH (Gas) 8015 8300 8300 5* Benzene <br /> 8020 20 0.023 5.5* <br /> TPH (Diesel) 8015 7$00 7800 5* Toluene 8020 190 190 5* <br /> ' Other fuel Ethylbetlzeae g020 200 200 5* <br /> Heavy metals xylem 8020 1100 1100 5* <br /> ' Other Other <br /> * No contaminants detected below 10 feet. <br /> M Groundwater Remediation Information <br /> ' Groundwater remediation method(s) NA <br /> Volume treated and/or removed NA <br /> ' If contamination is remaining, describe concentration range and volume (gallons or liters) <br /> None <br /> Table r V-Maximum documented contaminant concentrations in groundwater before and after cleanup <br /> F <br /> m= Method Before After Depth Contaminant Method Before After Depth <br /> used (mo) (mom) (ft) used (mg/1) (mgt) (ft) <br /> as) gee <br /> iesel) 8015 ND ND 40 Toluene 8020 ND ND 40 <br /> el Ethylbenzene 8020 ND ND 40etals xylem 8020 ND ND 40 <br /> Other <br /> V. Closure - <br /> Does Regional Board concur with closure? Yes No <br /> tionale for closure <br /> tocation of reports on file (Agency/Room) <br /> unty <br /> te nStaff person Phone <br /> al Board office Staff person Phone <br /> '8R ChckJ-wp 10 September 1993 <br />