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Case Closure Summary Page ` 1 <br /> Leaking Underground Fuel S orage Tank Program <br /> Ili Release and Site Characterization information (continued) <br /> Maximum Documented Contaminant Concentrations - - Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Con aminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) <1,0 NA <.05 <0.05 Xylene <.005 NA <.0005 <.0005 <br /> TPM (Diesel) 12 NA .063 <.05 Ethyl benzene <0.005 NA <.0005 00005 <br /> Benzene <0.005 NA <.0005 00005 ORI & Grease NA NA NA NA <br /> Toluene 1<0.005 NA 1.00083 <.0005 I MTB <.005 NA 0.410 0.0014 <br /> Comments: The soil before concentrations are from MW-1 at 30 fee bgs. There aren't any soil after concentrations since <br /> no soil confirmation borings were completed. The ground water befo e concentrations are from samples from MW-1 on <br /> 12/17/03 which is located south and down-gradient of the existing U Ts. The ground water after concentrations are from <br /> samples from MW-1 on 11120108. <br /> 11 1 <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial uses poi the 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 /> MonitoringNapor wells installed: Yes Number Decommissioned: 3 Number retained: 0 <br /> List enforcement actions taken: NOR sent to RP. <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title Director of Environmental Health <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> [FRB <br /> ate Submitted to RB: 4116109 Response Date: 5 May 2009 <br /> Staff: J. Barton Res onse: No Further Action Required Concurrence <br /> itle: Eng. Geologist j <br /> VII. Additional Comments, Data, etc. <br /> This is CASE 2 for this site address; the second NFAR granted. <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 />