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Case Closure Summary Page 2 <br /> i <br /> Leaking Underground fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations --Before and After Cleanup <br /> Contaminant Soil (Ppm) Water <br /> Before ' (PPm) Contaminant Soil [ppm) Water <br /> Gas After Before After (ppm) <br /> TPH <br /> ( ) 17,000 <-05 <05 Before After Before After <br /> TPH(Diesel) 10 Eden enene 390 <br /> <.OS <.05 . Xylene <.0005 <.0005 <br /> Benzene 9.2 <.0005 <, 3,000 <.0005 <,0006 <br /> Toluene 804 4005 MTBE 160 <br /> <.0005 <.0005 .004 <.001 <br /> on 5/799. <br /> vapor extraction was conducted at the site from October 2004 to July 2005 and it is estimated that 192 gallons l of g1as <br /> Soil <br /> Comments: Soil Before results are from soil beneath the underground storage tanks at the time of removaoline <br /> were extracted. Soil samples were not collected after operation of the soil vapor extraction system so there are no soil after <br /> results. Water Before results are from MW 1 on 11/02/01. Water After-results are from MWlR on 07/11/o5. MTBE nor any <br /> other contaminants of concern were confirmed to be in the groundwater. <br /> i <br /> iV. Closure <br /> Fco <br /> ed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> ed corrective action protect potential beneficial uses per the Regional Board Basin.Plan? Yes <br /> e action protect public health for current land use? Yes <br /> ent requirements: None }' <br /> a <br /> ive action be reviewed if land use changes? Yes <br /> MonitoringNapor wells decommissioned: Number Decommissioned: 1 Number retained: 3 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHS <br /> Signature: Date: i I <br /> Vl. 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: Associate 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 official <br /> site file. <br />