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Exxon #7-3708-Case #1 <br /> 2705 Country Club Blvd, Stoc V,o- <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) January 11, 2012 <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 4.4 <.005 1 .091 <.0005 <br /> Comments: Note-data limited to Exxon operation Aug 1991 to May 1997. Soil "before" from soil boring <br /> B-7 at 10' bgs on December 27, 1991. Soil "after" from VW-3 in May 1997 installation (same area as <br /> B-7 and MW-3). Water "before" from MW-3, December 10, 1992. Water "after" from last Exxon <br /> groundwater sampling event MW-3 on October 5, 1995. 1995 to current 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 MonitoringNapor wells been decommissioned? YES, Number Decommissioned-9 <br /> Number retained: 0 <br /> List enforcement actions taken: NOR, 11-1-1991 <br /> List enforcement actions rescinded: n/a <br /> i <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director, SJCEHD j <br /> Signature: v k ti Date: f <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: July 20, 2011 Response Date: August 18, 2011 <br /> RB Staff: James L.L. Barton Response: concurrence to NFA <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 /> My <br />