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wf <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) Fna <br /> er (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After ore After Before After Before After <br /> TPH(Gas) 1300 <0.1 0 0.050 Xylene 150 <0.001 4.5 <0.0005 <br /> TPH (Diesel) na na na Ethylbenzene 18 <0.001 <0.030 <0.0005 <br /> Benzene <1.0 <0.001 30 <0.0005 Oil&Grease na na na na <br /> Toluene <1.0 <0.001 <0.030 <0.0005 Heavy Metals Pb=5.3 Pb=53 na na <br /> MTBE <0.50 0.026 .126 0.00056 <br /> Comments: The soil before values are from samples collected at 14 feet BGS at the time of USTs removal. The soil after <br /> values are from samples in soil boring GP-3 near the former USTs. The before water values are from the grab sample <br /> collected from GP-3 and the after values are from the nearest downgradient MW-3 on 4/17/03. The only active remediation <br /> that occurred at this site was the removal of 450 cubic yards of soil from the former UST area. <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? No <br /> Monitoring/Vapor wells : 3 Number Decommissioned: 3 Number retained: 0 <br /> List enforcement actions taken: level one, NOR sent to RP <br /> List enforcement actions rescinded:NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director of Environmental Health Department <br /> Signature: Date. <br /> VI. Central Valley Regional Water Quality Control Board (RB)Notification <br /> Date Submitted to RB: October 8, 2003 Response Date: October 30, 2003 <br /> RB Staff: J. Barton Response: <br /> Title:Assoc Eng 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 />