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Leaking Underground Fu el Storage Tan,..;ogram <br /> III Release and Site.',Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup j <br /> Contaminant Soil (pprn) Water (ppm) Contaminant Soil {ppm) Water (ppm) II <br /> Before After Before After Before After Before After <br /> TPW (Gas) 74001 7400 None None Ethylbenzene 65 65 None None h� <br /> TPH {Diesel) NA NA None None Xylene 5.9 5.9 Bone None II <br /> Benzene <1.0 X1.0 None None Lead 22 22 <br /> Toluene 3.2 3.2 None None <br /> MTBE NA NA None None <br /> Comments: (NA- Not Analyzed) <br /> Following win removal of the'former underground storage tanks, a limited excavation was attempted. Approximately 156 cubic <br /> yards of contaminated soil was removed and soil samples were collected on May.18, 1993. The remaining soil <br /> contamination was characterized using information obtained during the drilling and sampling of five soil borings on July 19, ; <br /> 1995. <br /> . E <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. II <br /> Site management requirements: None. <br /> Should corrective actionbe reviewed if land use changes? Yes. <br /> Monitoring/Vapor wells: None. Number Decommissioned: None. Number retained: None. <br /> List enforcement actions taken: Notice of Reimbursements sent on 715189, 11/15/90 and 1114.91 <br /> List enforcement actions rescinded: None. <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health j <br /> { <br /> Signature: _ Date: <br /> L E <br /> VI. Central Valley 9 Water Regional QualityControl Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: Pat Anderson' .Response: j <br /> Title: Hydrogeologist , <br /> Vil. Additional Comments, Data, etc. <br /> Robert Job, California Registered Professional Engineer, Civil#51592 stated in the Condor Earth Technologies' report dated <br /> July 2, 1996 and May 23, 1996 that the remaining soil contamination would impact groundwater should the affected area not I' <br /> be paved to decrease infiltration of water. He stated that upon completion of the'site paving, he would request that the site <br /> be closed. He based his conclusions and recommendations on site data and SESOIL modeling. In the Condor report dated <br /> August 16, 1995, he stated that approximately 3 cubic yards of contaminated soil remained from approxirnately 6 to 11 feet <br /> beneath the south end of the concrete canopy foundation which was inaccessible at the time of the excavation attempt. <br /> { <br /> his document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />