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Case Closure Summary Page 2� <br /> Leaking Underground Fuel Storage Tank Program <br /> 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) 8900 29 FPPH .120 Xylene 730 4.6 FFPH .0011 <br /> TPH(Diesel) NA NA NA NA Ethylbenzene 100 <0.5 FFPH .0013 <br /> Benzene 8.9 <0.5 FPPH 0.0025 Oil &Grease NA NA NA NA <br /> Toluene 270 <0.5 FPPH <0.0005 Heavy Metals NA NA NA NA <br /> MTBE junk <0.5 0.0442 <0.0005 <br /> Comments: The Soil Before concentrations are from soil sample TP3 NE collected beneath one of the USTs (16.5 feet <br /> below grade)at the time of removal. The Soil After concentrations are from confirmation boring SB-13 at 30 ft. after <br /> remediation. The Water Before concentrations are from MW#1 on 2117100. Free phase petroleum hydrocarbon (FFPH) <br /> appeared in MW#1 after SVE/AS began. The Water After concentrations are from MW#1 on 8114105. No 1,2-DCA, EDB or <br /> other fuel oxygenates were detected in water after remediation. The SEV/AS remediation removed approximately 39,000 <br /> pounds of gasoline from 1999 to 2004, <br /> NA=not analyzed <br /> IV. Closure <br /> h <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 /> r <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 :22 Number Decommissioned: 22 Number retained: 0 <br /> List enforcement actions taken: NOR sent to R.P./Level 1 <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name Donna Hers EHS Title: Director, Environmental Health Department <br /> Sig ure•. Date:�� b <br /> Vl. !entral Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 01/30/2005 Response Date: 3/9/2006 i <br /> RB Staff: J. Barton Response: CVRWQCB concurs with Site Closure and�No <br /> Title: Eng. Geologist Further Action Required <br /> Vil. 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 />