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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 (ppm) FN�A <br /> {ppm) Contaminant Soil (ppm) Water {ppm) <br /> Before After After Before After Before After <br /> TPH(Gas) 5,400 2.4 <0.05 Xylene 510 <0.005 7.1 <0.0005 <br /> TPH(Diesel) NA NA NA Ethylbenzene 96 <0.005 1.7 <0.0005 <br /> Benzene 8.4 <0.005 . <0.0005 Oil&Grease NA NA NA NA <br /> Toluene 86 <0.005 0.44 <0.0005 Heavy Metals NA NA NA NA <br /> MTBE 14.6 <0.005 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 post-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? No Number Decommissioned: 0 Number retained: 6 <br /> List enforcement actions taken: NOR sent to RP <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name:Adrienne Ellsaesser, REHS Title:Acting Program Coordinator <br /> Sign atur . Date: <br /> VI.Central Valley Regional Water Qualitv Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James Barton, PG Response: <br /> Title: Engineering Geolo ist <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 />