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Case Closure Summary Page 2 Spw <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) 6,600 X1.0 120 13 Xylenes 630 <0.01 17 2.1 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 120 <0.005 3.2 <0.01 <br /> NA NA <br /> <25 <0.005 17 0.21 Oil&Grease NA NA <br /> Benzene <br /> Toluene 430 <0.005 34 0.35 Heavy Metals 5.0 NA NA NA <br /> MTBE 7.7 <0.005 44 0.39 <br /> Comments: "Soil Before" data from tank pit sample TK-1 West @ 15' bsg; "Soil After" data from CB-1, all of the vadose <br /> zone samples. "Water Before" and "Water After' data from well MW-1/EW-1. <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?YES <br /> Monitoring/Remediation wells decommissioned: YES Number Decommissioned: 22 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 List enforcement actions rescinded: NONE 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, RENS Title: DIRECTOR, ENVIRONMENTAL HEALTH DEPT. <br /> Signature: Date:�T ) [- �o O 1 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 08/20/10 Response Date: 09/22/10 <br /> RB Staff: JAMES L.L. BARTON, PG Response: CONCURRENCE <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> COMPLIANCE WITH PUBLIC PARTICIPATION REQUIREMENTS IN SECTON 2728 OF THE CALIFORNIA CODE OF <br /> REGULATIONS HAS BEEN MET. <br /> —:_ ,-_..___4 _R m--j; +—i rncF ri nqi 1RE LETTER shall be retained by the lead agency as part of the official site file. <br />