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1"'I <br /> 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) 50 <1 Ethylbenene <.03 <.005 <br /> TPH(Diesel) 51 61 Xylene .21 <.005 <br /> Benzene <.03 <.005 lead 7.3 140 <br /> Toluene <.03 <.005 MTBE NA <.005 <br /> MVO Method 8010 <.03 <br /> Comments: All levels in ppm. Soil Before levels from Soil Sample collected on 6/4/98. Soil After levels are from Soil <br /> Sample collected at 12 feet below surface grade (bsg) on 9/20/01. Goundwater was not investigated due to low levels in <br /> soil at 12 feet bsg and groundwater at 50 bsg. No remediation was required. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Pian? 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 List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: Date: _0 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 1/2/02 Response Date: 2/6/02 <br /> RB Staff: Marry 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 <br /> site file. <br />