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Case Closure Summary Page Y2 <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) 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 FFPH 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 1<0.5 10.0412 1<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 313-13 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 SVEIAS 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 SEVIAS remediation removed approximately 39,000 <br /> pounds of gasoline from 1999 to 2004. <br /> NA-not a nalyzed <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 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 :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 List enforcement actions rescinded: NA 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 Heran, EHS Title: Director, Environmental Health Department <br /> Sig ure'_ 9 Date: Q � <br /> VI_ +er7tral Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 01/30/2006 Response Date: 3/9/2006 <br /> RB Staff: J. Barton Response: CVRWQCB concurs with Site Closure and No <br /> Title: Eng. Geologist Further Action Required <br /> VII. Additional Comments, Data, etc. <br /> IF <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 />