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f <br /> Case Closure Summary Pa <br /> ge 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Ill Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup l° <br /> Soil (ppm) Water <br /> Before After (ppm) Contaminant Soil (Ppm) <br /> TPH (Gas) 1,700 for Before After Before ) Water (ppm) <br /> 290 13 0.15 After Before After <br /> TPH(Kerosene) 425 <5.01, a MTBE0.005 <0.005 <br /> <0.050 NA Oxygenates <0.s1<5.01 <O.Q05!<0.05Ds `0.0024 <O.00Q3 <br /> TPH(Diesel) <5.0 NA 651,2 NA 0.020 <0.005 <br /> Benzene 5 1,2-DCA NA <0.0056 <0.002a <0.00053 <br /> 0.005 <0.0056 0.024' <0.0005-' EDB NA <0.0056 <0.002a < 3 <br /> Toluene 3.0' 0.516 0.0801 <0.00053 Ethanol NA OA005 <br /> Eth benene 101 s NA <0.25Qa NA <br /> YI 0.6 0.095' 0.00123 Methanol NA NA <0.500° NA <br /> Xylene 201 3.76 0.280' 1<0.0013 Lead 35' NA 0.250' NA <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 /> "Before' concentrations from tank pull results. <br /> 2:Laboratory identified contaminant as kerosene instead of diesel based on chromatogram pattern. <br /> 3:Water'After' concentrations from 03/30/04 quarterly well sampling. <br /> a: Water concentrations from 11/27/01 quarterly well sampling. <br /> 5:Soil concentration from monitoring well installations. <br /> 6: 'After' concentrations from soil boring SB1) advanced on 3/16/04. <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 August 7, 2001 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> [Name: Margaret Lagorio Title: Supervising RENS <br /> nature: Date: - Q <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 />