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Case Closure Summary Page 2 <br /> N%w, Leaking Underground Fuel Storage Tanh..togram <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 Before (ppm) Water (ppm) <br /> Before After Before After After Before After <br /> TPH (Gas) 11,000 8.7 <.05 <.05 Xylene 820 0.54 <.0005 <.0005 <br /> TPH(Diesel) <1 <1 <.05 <.05 Ethylbenzene 120 0.12 <.0005 <.0005 <br /> Benzene 71 0.019 <.0005 <,0005 Oil&Grease NIA NIA N/A N/A <br /> Toluene 390 0.022 <.0005 <.0005 Lead 4.2 4.2 N/A N/A <br /> MTBE UNKNOWN <.05 UNKNOWN <.005 <br /> U <br /> Comments: TANK FIELD OVEREXCAVATED WITH 11,000 PPM TPH REMAINING AT 12 FEET. FOUR (4) <br /> ADDITIONAL SOIL BORING LOCATIONS DEFINE THE LIMITED EXTENT; 19.38 GALLONS OF GASOLINE 18 FEET <br /> BGS REMAINS IN SOIL. ON SITE MONITORING WELL*ND. <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: <br /> Should corrective action be reviewed if land use changes? (YES) <br /> Monitoring/Vapor wells decommissioned: (YES) Number Decommissioned: 1 Number retained: 0 <br /> List enforcement actions taken:. "NOR" SENT, LEVEL 1 <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: MARGARET LAGORIO TITLE: SUPERVISING REHS <br /> SITE MITIGATION/LOP UNIT IV <br /> Signature: Date: LU <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 /> 11 LOW RISK SOIL ONLY SITE <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 />