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s <br /> Leaking Underground Fuel storage Tank Pr gram <br /> III Release and Site Characterization Information(continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Water (ppm} Contaminant Soil Before (ppm) Water (ppm) <br /> Contaminant Soil Before {ppm} After Before After <br /> After Before After <br /> TPH{Gas) NA NA NA NA Ethyl-benzene <0.005 <0.005 NA NA <br /> TPH(Diesel) 13,000. <50. NA NA Xylene 3.1 <0.005 NA NA <br /> Benzene <0.005 <0.005 NA NA <br /> Toluene <0.005 <0.005 NA NA <br /> MTBE NA <0.05 NA NA <br /> Comments NOTE: GROUNDWATER RESULTS IN PARTS PER MILLION!., o remediation performed or required. <br /> TPH-Diesel hit in soil from"Dispenser 1" area at G' bgs on Nov-1998. Soil borings on Nov-1999 in same area revealed no <br /> TPH-Diesel hits at 10', 15'and 20' bgs. Most shallow DTW=-45'bgs. No hits to hreaten groundwater exists. <br /> IV.Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? None req. <br /> Does completed corrective action protect potential beneficial uses per the egional Board Basin Plan? NIA <br /> Does corrective action protect public health for current land use? NIA <br /> Site management requirements: none required by PHS-EHD <br /> Should corrective action be reviewed if land use changes?...no <br /> Have the Monitoring/Vapor wells been decommissioned? none installed Number Decommissioned: nla <br /> Number retained: 0 <br /> List enforcement actions taken: NOR,April 19, 1999 <br /> List enforcement actions rescinded: none <br /> V. Local Agency Representative Data <br /> Name: Donna Heran I Margaret Lagorio Title: Directo of Env Health I LOP Supervisor <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board(RB)Notification !, <br /> Date Submitted to RB: Response Date: <br /> RB Staff: Marty Hartzell Response: <br /> Title:. Engineering Geologist <br /> VII. Additional Comments, Data,etc. <br /> Simple soil case with no petroleum contaminants detected in post-UST re oval LOP Investigation...Any potential <br /> soil contamination was in stockpiled soil returned to piton top of clean i ported fill and distance to historical high <br /> depth to groundwater nearly 45 feet. Asphalt capped site minimizes rain II penetration and leaching to <br /> groundwater. No sensitive receptors within 2000'and no groundwater sa ples collected. <br /> This document and the related CASE CLOSURE LETTER, shall be retained by the lead agency as part of the official site file. <br /> MI/ 1/2000 <br />