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Vanco Truck Plaza Page 2 <br /> 1033 VII. Charter Way, Stockton <br /> Leaking Undsrground Fuel St racge Yank Program � <br /> Case Closure Su marl] <br /> III Release and Site Characterization Information (continu d) <br /> Maximum Documented Contaminant Concentrations - Before dind After Cleanup <br /> Contaminant Soil Soil Water Water After Contaminant Soil Soil Water Water <br /> Before After Before mgll Before After Before- Affier <br /> mg/kg mg/kg mg/I mg/kg mglkg mg/I mg/1 <br /> T PH (Gas) 230. NA 190. 0.800 Cth (benzene 0.19 NA <0.0005 <0.0005 <br /> TPH (Diesel) 5300. NA. 2200. 0.680 Xylene 0.15 NA <0.0006 <0.0005 <br /> Benzene <br /> <0.05 NA <0.0005 <0.0005 MT13E 1.4 NA <0.0005 <0.0005 <br /> Toluene <0.05 1 NA <0.0005 1 <0.0005 11,21DCA <0.005 1 NA 1<0.0005 1<0.0005. <br /> Comments: NO remediation conducted- after soil data listed as NA (not appllcable). Before soil from <br /> dispenser/island 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 samples at installation, 2005). Before groundwater from <br /> soil boring "B-4", 2004 and After groundwater from MVV-4, 200 . <br /> i <br /> IV. Closure I <br /> Does completed corrective action protect existing beneficial�usas per Regional Board Basin Plan? yes i <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? y s <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 List enforcement actions rescinded: none 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, R1=HS Title- Director Environmental Health Department <br /> r, <br /> Signature: _.� ��. Dat <br /> i <br /> Vl. Central Valley Regional Water Duality Control Board (R3) 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 />