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I <br /> Case Closure Summary Page <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) 1300 < 1.0 .460 <.05 Ethylbenene 20 <0.005 .0021 <.0005 <br /> TPH (Diesel) NA NA NA NA Xylenes 140 <0.005 .0023 <.0005 <br /> Benzene 0.055 <0.005 <.0005 <.0005 MTBE 34 <0.005 1.7 <.0005 <br /> Toluene 29 <0.005 <.0005 <.0005 1,2-DCA NA NA <.0005 <br /> EDB NA NA <.0005 <br /> Comments:Active remediation was not performed at this site. All "Before"and"After"results reported in parts per million. <br /> NA: Not analyzed <br /> Soil Before'concentrations are from beneath UST system at time of removal on 08/15/96 <br /> Soil After concentrations are from cone penetrometer test boring CPT-1 advanced on December 5, 2000 <br /> Water Before concentrations are from 10-07-98 quarterly sampling of monitoring well MW-1 <br /> Water After concentrations are from 10-10-05 quarterly sampling of MW-1 <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: 0 Number retained: 3 <br /> List enforcement actions taken: NOR sent 06/16/97 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHS <br /> Signature: Date: 1.2 I.IXI 0 S <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton Response: <br /> Title:Associate Engineering Geologist <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 />