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Case Closure Summary Pa%w <br /> Leaking Underground Fuel Storage Tank gram <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 /> ITPH(Gas) 410 <1 <.05 705 Xylene 46 <.001 <.0005 <.0005 <br /> TPH(Diesel) NA NA NA NA Ethylbenzene 6.9 <.001 <.0005 <.0005 <br /> Benzene 0.17 <.001 <,0005 <.0005 Oil&Grease ND<50 NA NA NA <br /> Toluene 6.7 <.001 <.0005 <.0005 Heavy Metals Pb14 NA NA NA <br /> MTBE NA <.001 .007 <.002 <br /> Comments:The Soil Before results are from the final UST excavation sampling at 16 feet below ground surface on <br /> 12/17/93. The Soil After results are from soil collected during installation of the monitoring wells on 5/14/02. The Water <br /> Before results are from MW-2 (placed in the former UST location)on 7/22/02.The Water After results are from MW-2 on <br /> 7/29/04. The only remediation was removal of 800 cubic yards of contaminated soil (to facilitate the installation of new <br /> UST'sj which was disp2sed at Forward Landfill. <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: NA <br /> Should corrective action be reviewed if land use changes?No <br /> Monitoring/Vapor wells decommissioned: No Number Decommissioned:0 Number retained: 3 <br /> List enforcement actions taken: NOR sent to RPs. <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHS/Site Mitigation/LOP Unit IV <br /> Signature: Date: 5 r <br /> VI. Central Valley Regional Water Quality Control Board (RB)Notification <br /> ESubmitftted to RB: Response Date: <br /> arton Response: <br /> olo 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 />