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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) Water (ppm) Contaminant Soil {ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 150,000 <1 14 <.05 Ethylbenene 3600 <005 .4 <,0005 <br /> TPH (Diesel) NA <1 1.6 <.05 Xylene 16000 <.005 1.1 <.001 <br /> Benzene 1200 <.005 1.5 <.0005 EDC <br /> <.0017 .770 .0057 <br /> Toluene 7000 <.005 .049 <.0005 <br /> MTBE I<.0005 1 .280 .0015 <br /> Comments: Soil Before is from the UGT system removal Piping Line#3 on 11122189. Soil After is from VS-2-25' on 8/29/97. <br /> Groundwater Before for BTEX , TPH-g and TPH-d is from MW3 on 718/93, EDC and MTBE is from MW1 on 718/93. <br /> Groundwater After is from MW2 on 11/21197. <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: No Number Decommissioned. Number retained: 9 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHS <br /> Signature: Date: <br /> Vi. Central Valley Regional Water Quality Con rol Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: P. Anderson Response: <br /> Title: Hydrogeoiogist <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 />