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r 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 Before (ppm) Water (ppm) Contaminant Soil,Before (ppm). Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 14,000 970 2.6 ND Xylene1,500 0.01 0.039 Nb <br /> TPH(Diesel) NA NA NA NA Ethylbenzene 210 ND 0.037 ND <br /> Benzene 0,90 0.01 0.1 0.0012 Oil&Grease NA NA NA NA <br /> Toluene 130 0.01 0.0088 0.0011 Heavy Metals NA NA NA NA <br /> MTBE NA 0.09 NA 2.39 <br /> Comments: MTBE IN GROUNDWATER IS CONSIDERED TO BE MOVING ON-SITE FROM AN UPGRADIENT SOURCE. <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: DTSC HAS REQUIRED A DEED RESTRICTION FOR THE SITE. <br /> Should corrective action be reviewed if land use changes?YES <br /> Monitoring/Vapor wells decommissioned: 9 Number Decommissioned: 11 Number retained: 0 <br /> List enforcement actions taken: NOR• <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signature: Date: f s aZ <br /> VI. Central Valley Regional Water Quality Control Board (RB)Notification <br /> Date Submitted to RB: 5122102 Response Date: 6127102 <br /> RB Staff: MARTY HARTZELL Response: CONCURRENCE <br /> Title: ASSOCIATE'ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> F <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 /> L <br /> 4 <br />