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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) 16 <5 Ethylbenene .22 <.002 <br /> TPH(Diesel) <3000 <10.1 Xylene 1.8 <.0039 <br /> Benzene <.05 <.002 <br /> Toluene <.05 <.002 MTBE NA <.01 <br /> Comments: All levels in ppm. Soil Before levels from soil below the UST in the NE corner of the excavation at 9 feet below <br /> surface grade at time of removal. Soil After levels are from soil boring 3 at 16 feet below surface grade on 6114100. <br /> Samples from all the other soil borings completed on 6114100 were non detect. No groundwater samples were collected. <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: NA Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: h6==ZZ::�L Date: fl O <br /> VI, Central Valley Regional Water Quality Control Board (RB) Notification 'T <br /> Date Submitted to RB: 3130101 Response Date: 4123101 <br /> RB Staff: Marty Hartzell Response: Concurrence <br /> Title: Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> IE---- <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 />