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Case Closure Summary Page 2 <br /> Leaking Underground Fuel S orage Tank Program <br /> Ill 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 <br /> Before After Before After <br /> TPH (Gas) 0200 <.005 Ethy benene .097 <.0001 i <br /> TRH (Diesel) 22,900 <,05 Xylene .407 <.0001 <br /> Benzene .002 <.0001 MTB E <.002 NA <br /> Toluene .2 00001 PCE .085 .0041 <br /> I <br /> Comments: There was no cleanup/remediation performed. Soil Before results for TPH-d is from aslant boring on 2126107 <br /> and for TPH-g and BTEX, MTBE from B7-14 on 3/612008. Water Be ore results are from a grab sample from B5 on <br /> 4120109. Soil contamination remains in place within about a 4 foot radius of the center of the UST that was closed in place. <br /> The volume of contaminated soil remaining is limited. The groundwater is non-detect except for PCE which is below the <br /> MCL. <br /> IV. Closure <br /> i <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 /> I <br /> Does corrective action protect public health for current land use? Ye <br /> Site management requirements: None <br /> Should corrective action be reviewed if land use changes? Yes I <br /> MonitoringlVapor wells decommissioned: Number Decommissioned: Number.retained: 0 <br /> i <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> a <br /> i <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Program Coordinator <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to Ria: Response Date: <br /> RB Staff: James L.L. Barton Response: i <br /> r <br /> Title: Associate Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> 1E__ f <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 />