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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> i!! 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 <br /> Before After Before After <br /> TPH(Gas) 260 <1.0 17 <0.050 Ethylbenene 15.0 <0.005 0.048 <0.0005 <br /> TPH(Diesel) NA NA NA NA Xylene 34.0 <0.01 0.068 <0.001 <br /> Benzene 6.8 <0.005 0.61 <0.0005 MTBE NA NA NA NA <br /> Toluene 21.0 <0.005 0.25 <0.0005 <br /> Comments: Soil Before results are from soil boring P2 collected on 02/02/98 at 20 feet, except total xylene soil results are <br /> from P2 at 10 feet. Soil After results are from borehole SBF at 35 and 45 feet collected on 03103105_ Water Before results <br /> are from soil boring P5-W collected at 50 feet on 03108198. Water After results are from MW-1 collected on 03130107. <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 decommissioned: Yes Number Decommissioned: 3 Number retained: 0 <br /> List enforcement actions taken: NOR 04/07/98 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director of Environmental Health Department <br /> Signature: 'T�� Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification [ <br /> Date Submitted to RB: August 24, 2007 Response Date: September 14, 2007 <br /> RB Staff: James L.L. Barton Response: No Further Action Required 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 />