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M. Soil Remediation Information <br /> Soil remediation method(s) Excavation, Aeration, and Natural ,Biodegradation <br /> Volume treated and/or removed 1 ,600 cubic yards <br /> Contaminated soil disposal site N' A <br /> ' If contamination is remaining, describe concentration range and volume (cubic yards or meters) <br /> ' Table III - Maxim= documented contaminant concentrations in soil before and after cleanup <br /> Contaminant Method Before After Depth Contaminant Method Before After Depth <br /> used (mg1kg) (mS1kg) (ft) used (mfg) (mglkg) (ft) <br /> TPH (Gas) soil, 1 100 1-n 16 Beazrne 8020 24 <0.005- 16 <br /> TPH (Diesel) 8015 14 1.0 12 Toluene 8020 120 40.005- 16 <br /> Other fuel Ethylbenzene 8020 120 140.005 16 <br /> Leavy metals Xylene 8020 27 C 0.005 16 <br /> ' Other Other <br /> ' IV. Groundwater Remediation Information <br /> Groundwater remediation method(s) <br /> Volume treated and/or removed 7,500 <br /> ' If contamination is remaining, describe concentration range and volume (gallons or liters) <br /> Table W-Madmum documented eontammant concentrations in grouadarater before and after cleanup <br /> Cont=inant Method Before After Depth Contaminant Method Before After Depth <br /> ' used (mgt) (mg/1) (n) used (mg/1) (mgll) (ft} <br /> TPH (Gas} 8015 1,800 <0.005 14e 8020 140 t 0.0005 <br /> TPH (Diesel) 8015 00.005 [/,0.005 14 Tolu=c 8020 97 40.0005 <br /> Other fuel Ethylbcn=c f <br /> 8020 5.0 <0.0005 <br /> Heavy metals xylem 8020 240 /,0.0005 <br /> Other Other <br /> ' V. Closure <br /> Does Regional Board concur with closure? Yes No <br /> ' Rationale for closure <br /> ation of reports on file (Agency/Room) <br /> County Staff person Phone <br /> Regional Board office Staff person Phone <br /> ' SBR CWLk=wp io Sepumber 1e <br />