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Case Closure Summary Page%w/ <br /> lop" <br /> S. 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 <br /> (ppm} <br /> Before After Before After <br /> Before After Before After <br /> TPH (Gas) 5,400 2.4 10 <0.05 Xylene 510 <0.005 1.1 <0.0005 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 96 <0.005 1.7 <0.0005 <br /> Benzene 8.4 <0.005 0.31 <0.0005 Oil & Grease NA NA NA NA <br /> Toluene 86 <Q.Q05 Q.44 <O.D005 Heavy Metals NA NA NA NA <br /> MTl3i; 4.6 <Q.005 1.4 0.092 <br /> Comments: The soils before concentrations are from sample MW-2 collected at 5.5 feet bsg pre-remediation; soils after <br /> concentrations are from sample BH-H collected at 4 feet bsg past-remediation. The groundwater before and after <br /> concentrations are from monitoring well MW-2. <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: NFAR <br /> Should corrective action be reviewed if land use changes? Yes <br /> Monitoring/Vapor wells Decommissioned? Yes Number Decommissioned:20 Number retained: 0 <br /> List enforcement actions taken: NOR sent to RP <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> FNamet: Donna Heran, REHS Title: Director <br /> ure: Date: <br /> 4 - 1Z- r9-i1 <br /> VI. Central Valley Regional Water Quality Control Board Ria Notification <br /> =James <br /> : August 26, 2011 Response Date: September 15, 2011 <br /> on, PG Response: No Further Action Required Concurrence <br /> ologist <br /> VII. Additional Comments, Data, etc. <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 />