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r Case Closure Summary Page' - <br /> j aking Underground Fuel Storage Tank Pham i <br /> } `ill Release and Site Characterization Information (continued) <br /> r <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> u <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After i� Before After Before After <br /> TPN(Gas) <.05 1,800 NT Xxxxxx Chromium 14.08 NT NT xxxxxx <br /> TPH(Diesel) 6,400 3,800 NT xxxxxx Cadmium!!, 1.4 NT NT xxxxxx <br /> Benzene <0.3 <0.3 NT xxxxxx Nickel .i 67 NT NT xxxxxx <br /> Toluene .04 <0.3 NT xxxxxx MTBE NT <0.3 NT xxxxxx <br /> Ethylbenzene 3.3 1.0 NT xxxxxx PCB <0.25 NT NT xxxxxx <br /> Xylene 6.8 3.2 NT xxxxxx <br /> Motor Oil <1.0 2,300 NT xxxxxx <br /> II < <br /> ij- <br /> Comments: Soil before sample results are from piping removal. Soil afters results are from borings at 10 feet below surface f <br /> grade. All soil sample results were ND below 10 feet bsg to 30 feet bsg. Groundwater was not encountered during <br /> investigation. <br /> l� <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?YES <br /> I} <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? YES <br /> s- Does corrective action protect public health for current land use? YES j I <br /> it <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if land use changes?YES ;} <br /> H <br /> Monitoring/Vapor wells decommissioned: 0 Number Decommissioned: 0 Number retained: 0 <br /> List enforcement actions taken= NOR <br /> 1 <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> I� <br /> Name: DONNA HERAN Title: DIRECTQR OF ENVIRONMENTAL HEALTH <br /> E la <br /> Signature: - pate; <br /> 3- o0 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification �{ <br /> i� <br />' Date Submitted to RB: 6115100 Response Date: 7119100 <br /> RB Staff: MARTY HARTZELL Response: Closure Concurrence <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST Ij <br /> ii <br /> VII. Additional Comments, Data, etc. <br /> it. <br /> Shallow"soil only'contamination. No Oxygenates evidenced in soil. , <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 />