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r , <br /> Case Closure Summary Pam? <br /> Leaking Underground Fuel Storage Tank�rogram <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 600ppm <1.0ppm Xylene 52.Oppm .078ppm <br /> TPH(Diesel) 180ppm N/A Ethylbenzene 8.Oppm .013ppm u <br /> Benzene .04ppm .009ppm Oil&Grease <br /> Toluene 7.4ppm .078ppm Heavy Metals <br /> MTBE I N/A 1.39 <br /> Comments: Soil before from sample#7, regular unleaded west 18' bsg (below surface grade), except Benzene from sample <br /> #8 under piping and TPHd from sample#11 under piping. Soil after from borings on 5/9/96 sample 62-35', except MTBE <br /> from 132-45'. <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 Plan? 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? <br /> Monitoring/Vapor wells decommissioned: Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO Title:SUPERVISING REHS/SITE MITIGATION-LOP UNIT <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff. PAT ANDERSON Response: <br /> Title: HYDROGEOLOGIST <br /> VII. Additional Comments, Data, etc. <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 />