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' III. Soil Remediation Information Sod remediation method(s) vaoor extraction with off- as abaterent Volume treated and/or removed 120' x 75' x 30' Contaminated soil disposal site NA ' If contamination is remaining, describe concentration range and volume (cubic yards or meters) ethyl benzene @ 0.010ppm and total xylenes @ 0.16 ppm, less than 5 cubic yarns Table III - Mwdmuxo documented contain naut concentrations in soil before and after cleanup ' Coatamnmm Method Before After Depth Contaminant Method Before Afar Depth ' used (mg/kg) (mg/kg) (ft) used (mg/kg) (mg/kg) (ft) TPH (Gas) 20 8015 8,900 <1.0 Benzene 0020 210 <0.005 20 TPH (Diesel) 8015 20,000 <5.0 20 Toluene 8020 560 <0.005 20 ' Other fuel Ethylbenzeae 8020 220 0.010 20 Heavy acetals Xylene 8020 920 0.16 20 Other lead 0.059 20 Other Naphtha 3,500 5.5 IV. Groundwater Remediation Information Groundwater remediation method(s) Passive raTediation Volume treated and/or removed none ' If contammation is remaining, desenbe concentrauon range and volume (gallons or liters) r Table IV • Ma3dmum documented contaminant concentrations in groundwater before and after cleanup r Contaminant Method Before After Depth Contammanr Method Before After Depth used (mg/1) (MO) (ft) used (mgr) (m9/1) (ft) TPH (Gas) 8015 0.790 <0.050 NA Bye 8020 0.082 <0.0005 NA ' TPH (Diesel) 8015 0.720 <0.720 M Toluene 8020 0.022 <0.0005 NA Other fuel Ethylbenzeae 8020 0.0045 <0.0005 M r- ' Heavy metals Xyleae 8020 0.016 <0.0005 NA - Other. lead 0.110 <0.005 NA Other, IV. Closure - - - Does Regional Board concur with closure? Yes No ' ' Rationale for closure f t tion of reports on file (Agency/Room) V ty Staff person Phone Regional Board office Staff person Phone 'SSR Cheklut.wp 10 Sept=ta 1993