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IM <br /> Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) �# <br /> i <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil <br /> Before After Before After (ppm) Water (ppm) <br /> I TPH(Gas) <1 <2 i Before After Before After <br /> ' TPH(Diesel) 20,000 <1 <.05 Ethylbenene <.045 <.005 <.0003 <br /> Benzene <.005 c005 <.05 Xylene j <.005 <005 c0006 <br /> <.O0D3 <br /> Toluene <.005 <005MTBE h <.020 <.010 <.002 <br /> Comments: All levels in ppm. Soil Before levels from UST removal at 12 feet below grade on 11129101. Soil After levels <br /> are from after a limited overexcavation of UST area was performed and were collected at 14 feet below grade on 12/6/01. <br /> Groundwater After levels are from grab samples of water in excavation after limited overexcavation on 1216101. <br /> { <br /> IV. Closure <br /> j� <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> ii <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 !k <br /> Site management requirements: None <br /> j�. <br /> Should corrective action be reviewed if land use changes? No <br /> Monitoring/Vapor wells decommissioned: NA Number Decommissioned: It Number retained: i <br /> I4 } <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data I� i <br /> Name: Margaret Lagorio Title: Supervising REHS i <br /> Signature: Date: � �' y <br /> Vi. Central Valley Regional Water Quality Control Board (RB) Notification <br /> I <br /> Date Submitted to RB: Response <br /> Date: <br /> RB Staff: Marty Hartzell Response: <br /> Title:Associate Engineering Geologist ?1. <br /> VII. Additional Comments, Data, etc. <br /> i� <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. l <br /> .R <br /> ;f <br /> �� i <br />