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Case Closure Summary Pam �.• <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) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After I Before After Before After <br /> TPH (Gas) 2,500 1000 Xylene 12 0.61 <br /> TPH (Diesel) N/A Ethylbenzene <0.02 <0.05 u <br /> Benzene 3 <0.05 Oil&Grease <br /> Toluene 14 <0.05 Heavy Metals <br /> MTBE NIA <0.2 <br /> Comments: BEFORE CONCENTRATIONS FROM UST REMOVAL SAMPLES (1/88). CONCENTRATIONS AFTER <br /> FROM BORING SAMPLES (6/6/96). <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/Vapor wells decommissioned: Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director, Environmental Health <br /> Signature: G � f- Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB:April 28,1998 Response Date: 05/12/98 <br /> RB Staff: PAT ANDERSON Response: Concurrence <br /> Title: HYDROGEOLOGIST <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 />