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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 /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) <10 <1 NA NA Xylene 0.38 <.01 NA NA <br /> TPH (Diesel) NA NA NA NA Ethylbenzene <.05 <.005 NA NA <br /> Benzene <.05 <.005 NA NA Oil &Grease NA NA NA NA <br /> Toluene <.05 <.005 ND ND Heavy Metals 11 NA NA <br /> MTBE 12 <0.005 NA NA <br /> Comments: Soil contamination found at time of UST dispenser upgrade (NW-Dispenser at 2 feet). Additional soil <br /> investigation was completed and 2 samples collected. Soil samples before concentrations are from 2 feet under dispenser <br /> at time of upgrade and soil after concentrations are from a soil boring near NW dispenser at 10 and 20 feet bgs. <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: NA <br /> Should corrective action be reviewed if land use changes? No <br /> Monitoring/Vapor wells decommissioned:NA Number Decommissioned: NA Number retained:0 <br /> List enforcement actions taken: NOR sent to RP. <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director, Environmental Health Department <br /> Signature: Date: 06/15/04 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: 05/25/04 <br /> RB Staff: J. Barton Response: No Further Action Required Concurrence <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> SOIL ONLY, NO REMEDIATION <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 />