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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <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) 1.1 NA 110 <.05 Ethylbenene <,008 NA 2.7 <001 <br /> TPH (Diesel) Xylene .088 NA 15 <.001 <br /> Benzene <.008 NA .160 <.001 MTBE .250 NA 5.2 .0017 <br /> Toluene <.008 NA 3.1 <.001 <br /> Comments: Soil Before results from MW 1 at 6 feet on 6122100. No remediation performed so Soil After results not <br /> applicable (NA). Groundwater Before results are from the grab sample from the excavation at time of the UST removal. <br /> Groundwater After results are from MW2 on 1113105. <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? Yes <br /> Monitoring/Vapor wells decommissioned: No Number Decommissioned: 4 Number retained: 0 <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 List enforcement actions rescinded: 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: 819105 Response Date: 917105 <br /> RB Staff: ,lames L.L. Barton 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 <br /> site file. <br />