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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 /> m Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Contaminant Soil (PP ) Before After Before After <br /> Before After Before After <O.QDS 0.081 <0.001 <br /> TPH(Gas) <1.0 340 <0.050 Ethylbenene <br /> N A 0.16 Xylene <0.005 <0.050 <0.001 <br /> TPH (Diesel) NA <0.001 MTBE 80 440 <0.001 <br /> Benzene 0.16 U•650 <br /> Toluene <0.005 <0.050 <0.001 1.2 DCA NA NA <0.001 <br /> Comments: Soil Before data are from sample 3E collected at approximately 15 feet bsg during the LIST removed on <br /> 12110198. Soil After data are not available since soil confirmation samples were not collected. Water Before data are from <br /> VW-1 collected on 10114199. Water After data are from the VW-1 collected on 04126111. NA--not analyzed <br /> IV. Closure <br /> FDoescormnPcIEetedEcOrrective <br /> orrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> action protect potential beneficial uses per the Regional Board Basin Plan? Yes <br /> tive 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 wells decommissioned: Yes Number Decommissioned: 15 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: �— Date: November 5, 2012 <br /> A— <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: September 29, 2011 Response Date: October 12, 2011 <br /> RB Staff: James 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 />