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Leaking Underground Fuel Storage Tank rogram . <br /> r <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) <1.0 <1.0 130.* .27 Ethyl-benzene NIA 0.005 N/A <0.0005 <br /> TPH (Diesel) <1.0 NIA NIA NIA Xylene <0.01 0.007 19.* <0.0005 <br /> Benzene <0.01 <0.005 .7* 0.0013 EDB <Q.010 NIA NIA <0.0005 <br /> Toluene <0.01 <0.005 3.3* <0.0005 Lead 5.0 NIA NIA <0.005 <br /> 1,2-DCA NIA** NIA NIA <0.0005 MtBE <5.0 NIA ,066"** <0.001 <br /> Comments NOTE., GROUNDWATER RESULTS IN PARTS PER MI,LLIONI <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 B1",07102196. <br /> All other Oxygenates (TAME, EtBE, DIPE,TBA, McOH, ETOH) non-detect per EPA-82608, on 7-19-01 for all three <br /> monitoring wells. <br /> "AFTER"groundwater data from QM-3'd-2001 held July 13, 2001. <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? NOT REQUIRED. <br /> Have the Monitoring[Vapor wells been decommissioned? YES. Number Decommissioned: 3. <br /> Number retained: 0. <br /> List enforcement actions taken: NOR, 10/27/95 <br /> List enforcement actions rescinded: NIA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran 1 Margaret Lagorio Title: Director of Envn Health 1 LOP Supervisor <br /> Signature: Date: -�-�� <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: November 30,2001 Response Date: December 28, 2001. <br /> RB Staff: Marty Hartzell Response: concurrence <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> Small over-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 fill pit vacated by two 10,000-gallon steel USTs. Three monitoring wells installed at site during <br /> July 1996 and each sampled four times since. No new USTs installed and site remains today as it was in May 1988. <br /> CVRWQCB issues "Concurrence with No further Action Required" letter, dated December 28,2001. Three <br /> monitoring wells properly destroyed March 1,2002. Final report with manifests and disposition records received <br /> August 19,2002. <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 /> M 118102 <br /> s <br />