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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Ill 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) 9 <1 <.05 Ethylbenene .03 <.005 <.0005 <br /> TPN(Diesel) 100 <1 .089 Xylene .440 <.005 <.0005 <br /> Benzene .0077 <.005 <.0005 <br /> Toluene <.005 <.005 <.0005 PCE .048 <.005 :0016 <br /> MTBE NA <.005 <.005 <br /> Comments: Soil Before results are from beneath the 12,000 gallon UST's removed in 1995, except the PCE which is from <br /> below the waste oil piping closed in place on 3121101. The Soil After results are from soil boring B1 drilled on 3117100, <br /> except for PCE which is from SB1 drilled on 214102. Water Before results are from grab water from B1 drilled on 3117100, <br /> except PCE which is from grab water from SB1 drilled on 214102. No remediation was performed and there are no water <br /> after results. <br /> IV. Closure <br /> 1 <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? Yes <br /> Monitoring/Vapor wells decommissioned: NA Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR <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 List enforcement actions rescinded: 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: 4124102 Response Date: 517102 <br /> RB Staff: Marty Hartzell 'Response: Concurrence <br /> Title: Associate Engineering Geologist <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 I <br /> site file. <br /> r <br />