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Exxon #7-3708-Case #1 <br /> 2705 Country Club Blvd, StocIlon. <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information continued <br /> JuIv 21, 2011 <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) 300. <1.0 4. <0.05 Xylene 15. <.005 0.14 <.0005 <br /> TPH (Diesel) NA NA NA NA MTBE NA NA NA NA <br /> Benzene .360 <.005 1.7 0.013 1,2-DCA NA <0.1 NA NA <br /> Toluene 1 .0 <.005 0.15 <.0005 TBA NA NA NA NA <br /> Ethyl-benzene 1 4.4 <.005 .091 <.0005 <br /> Comments: Note-data limited to Exxon operation7� 77777y 1997. Soil "before" from soil boringB-7 at 10' bgs on December 27, 1991. Soil "afteay 1997 installation (same area asB-7 and MW-3). Water "before" from MW-3, DeWater "after" from last Exxongroundwater sampling event MW-3 on October 5current data on Case #2 closure. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial uses per Regional 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/Vapor wells been decommissioned? only VW-2. Number Decommissioned:1 <br /> Number retained: 9 <br /> List enforcement actions taken: NOR, 11-1-1991 <br /> List enforcement actions rescinded: n/a <br /> V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser, REHS Title: Acting LOP Program Coordinator <br /> Signature: Date: <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: 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 <br /> of the official site file. <br /> Mi/ <br />