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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tarogram <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup <br /> Contaminant I Soil (ppm) Water (ppm) Contaminant soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 71 ND Ethylbenene .52 NA <br /> TPH(Diesel) 1100 ND Xylene 3.3 NA <br /> Benzene .071 NA <br /> Toluene .62 NA <br /> MTBE <br /> Comments: Soil results "before"are from stockpile soil that was placed back in the excavation after the tank removal. The <br /> soil sample results from beneath the tank at the time of removal was ND except for xylene at .014 ppm. Soil samples <br /> taken after the stockpiled soil was removed on 6/27/97 were analyzed for TPH only. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Pian? Yes <br /> Does corrective action protect public health for current land use? Yes <br /> Site management requirements: None <br /> Should corrective action be reviewed if land use changes? No <br /> Monitoring/Vapor wells decommissioned: NA Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR dated 6/24/97 <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 9/18/97 Response Date: 10/1/97 <br /> RB Staff: Pat Anderson Response: Concurrence <br /> Title: H droGeolo ist <br /> VII. Additional Comments, Data, etc. <br /> SOIL ONLY <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />