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a Vanco Truck Plaza Page 2 <br /> 1033 W. Charter Way, Stockton ` <br /> Leaking Underground Fuel Storage Tank Program <br /> Case Closure S rnmary <br /> Ill Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations - Before and After Cleanup <br /> Contaminant7 Soil Soil Water Water After Contaminant Soil Soil Water Water <br /> Before After Before mg/l Before After Before After <br /> mg/kg mglkg mg/l mg/kg mg/kg mgll mg/I <br /> TPH (Gas) 230. NA 190. 0.800 Et iylbenzene 0.19 NA <0.0005 <0.0005 <br /> TPH (Diesel) 5300. NA. 2200. 0.680 X lene 0.15 NA <0.0006 <0.0005 <br /> Benzene <0.05 NA <0.0005 <0.0005 M BE 1.4 NA <0.0005 <0.0005 <br /> Toluene <0.05 1 NA <0.0005 <0.0005 1, -DCA <0.005 NA <0.0005 <0.0005 <br /> Comments: NO remediation conducted- aftersoil data lis ed as NA (not applicable). Before soil from <br /> dispenserlisland area, 2003 piping upgrade trench soil sample, "P-13" at 6'bgs, except TPHg (boring B3-15' soil <br /> sample, 2003) and 1,2-DCA (all MW-4 and MW-5 soil sampl s at installation, 2005). Before groundwater from <br /> soil boring "B-4", 2004 and After groundwater from MW-4, 20 8. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per Regional Board Basin Pian? yes <br /> Does completed corrective action protect potential beneficial uses per 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 /> Have the Monitoring been decommissioned? Yes Number Decommissioned: 7 Number retained: 0 <br /> List enforcement actions taken: NOR, June 4, 2003 (operator) and September 19, 2003 (landowner) <br /> List enforcement actions rescinded: none <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Ti le: Director, Environmental Health Department <br /> Signature: }_ �_. Date: <br /> Vl. Central Valley Regional Water Quality Control Board ( B) Notification <br /> Date Submitted to RB: August 23, 2010 Response Date: September 16, 2010 <br /> RB Staff: James L.L. Barton Response: concurrence <br /> Title: 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 <br /> official site file. <br /> Mif <br />