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Leaking Underground Fuel Storage Tank Program <br /> i <br /> it <br /> III Release and Site Characterization Information continued <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> ,M <br /> Contaminant Sail (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) <1.0 <1.0 130 ' 27 Ethyl-benzene N!A 0.005 NIA <0.0005 <br /> TPH (Diesel) <1.0 NIA NIA N/A Xylene <0.01 0.007 19.* <0.0005 <br /> Benzene <0.01 <0.005 .7* 0.0013 EDB <0.010 NIA N1A <0.0005 <br /> Toluene <0.01 <0.005 3.3* <0.0005 Lead 5.0 NIA NIA <0.005 <br /> 1,2-DCA I NIA** NIA NIA <0.0005 MtBE <5.0 NIA .066*** 1<0A01 <br /> i <br /> Comments NOTE. GROUNDWATER RESULTS IN PARTS PER MILLION! <br /> *denotes grab water sample from UST pit at time of UST removals,4-18-88. <br /> **denotes Not Analyzed. � <br /> 'denotes grab groundwater sample from "UST pit soil boring B11', 07/02196. <br /> All other Oxygenates (TAME, EtBE, DIPE,TBA, McOH, ETOH) non-detect per EPA-826013, on 7-19-01 for all three <br /> I monitoring wells. <br />' "AFTER"groundwater data from QM-3 -2001 held July 13,2001. <br /> IV. Closure <br /> F <br /> s completedcorrective action protect existing beneficial uses per the Regional Board Basin Plan? YESs completed co.A rrective action protect potential beneficial uses per the Regional Board Basin Plan? YES <br /> s corrective action protect public health for current land use? YES <br /> j <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if land use changes? NOT REQUIRED. <br /> Have the Monitoriri'g/Vapor wells been decommissioned? NOT YET. Number Decommissioned: 0. <br /> Number retained: 3. <br /> List enforcement actions taken: NOR, 10/27/95 <br /> List enforcement actions rescinded: NIA <br /> V. Local Agency Re presentative Data <br /> [Name: Donna Heron 1 Margaret LagorioTitle: Director of Envn Health 1 LOP Supervisor <br /> nature: Date: <br /> t <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> �R <br /> RB Staff: Marty Hartzell Response: <br /> Title: En ineerin ;Leola ist <br /> VII. Additional Comments, Data, etc. <br /> I Small aver-excavation done at time of UST removal in April 1988(pre LOP, pre `interim' remedial action <br /> designation). Consultant reports 120 cubic yards of soil `excavated and removed from the site', but unable to <br /> verify disposition of soil. No records available to show if removed from site or returned to pit. No record of <br /> `imported' soil to#ill pit vacated by two 10,000-gallon steel USTs. Three monitoring wells installed at site during <br /> .Jul 1996 and eachsam led four times since. No new USTs installed and site remains todayas it was in May 1988. <br /> 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 /> MI/11101 <br />