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Case Closure Summary Page <br /> 1•eeaking Underground Fuel Storage Tank Ptelvfam <br /> flaw[ <br /> � ¢ <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> Contaminant Soil =After <br /> Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before Before After Before After Before After <br /> TPH (Gas} NA NA NA xxxxxx Xylene <.003 .026 NA xxxxxx <br /> TP <br /> H (Diesel) 13,000 <1.0 NA xxxxxx Ethylbenzene <.003 <.005 NA xxxxxx <br /> Benzene <.003 <.005 NA xxxxxx Oil &Grease NA NA NA xxxxxx <br /> Toluene .005 .070 NA xxxxxx Heavy Metals NA NA <br /> 05 NA xxxxxx <br /> MTBE <.05 <.05 NA xxxxxx MTBE <.05 xxxxxx <br /> Comments: SOIL BEFORE SAMPLES WERE FROM SOIL SAMPLES COLLECTED BELOW THE USTs AT TIME OF <br /> TANK REMOVAL. SOIL AFTER RESULTS WERE FROM THE PRELIMINARY SITE INVESTIGATION BORINGS 219100. <br /> GROUNDWATER DEPTH IS APPROXIMATELY 59 FEET BSG. AND WAS NOT SAMPLED. HISTORIC <br /> GROUNDWATER LOW IS APPROXIMATELY 90 FEET BSG. <br /> 1V. Closure <br /> Does completed corrective action protect existing beneficial useper 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 /> MonitvringNapor wells decommissioned: 0 Number Decommissioned: 0 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signature: Date: — —OU <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 5117100 Response Date: 6113100 <br /> RB Staff: MARTY HARTZELL Response: CONCURRENCE <br /> Title: ASSOCIATE ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> MINIMAL SOIL ONLY CONTAMINATION. <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 />