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r � <br /> Case Closure Summary Page 2 <br /> Leaking Underground Fuel S orage Tank Program <br /> III Release and Site Characterization Information (continued) <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) <1.0 NA <.05 <0.05 Xylene <.005 NA <.0005 <.0005 <br /> TPH (Diesel) 12 NA .063 <.05 Eth (benzene <0.005 NA <.0005 <.0005 <br /> Benzene <0.005 NA <.0005 <.0005 Oil Grease NA NA NA NA <br /> Toluene <0.005 1 NA 1.00083 1<.0005 1MT E 1<.005 I NA 10.410 10.0014 <br /> Comments: The soil before concentrations are from MW-1 at 30 feet bgs. There aren't any soil after concentrations since <br /> no soil confirmation borings were completed. The ground water before 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 /> 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 per the Regional Board Basin Plan? Yes <br /> Does corrective action protect public health for current land use?Ye <br /> Site management requirements: None <br /> Should corrective action be reviewed if land use changes? Yes <br /> Monitoring/Vapor 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 List enforcement actions rescinded: NA 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 Titl : Director of Environmental Health <br /> Signature: Date: <br /> k <br /> ----rVi-�-Central'Valkey-Re-gion-al-Woter-Quality Control'Board-(RB)-'Ni tific tion <br /> Date Submitted to RB: 4116109 Response Date: 5 May 2009 <br /> RB Staff: J. Barton Response: No Further Action Required Concurrence <br /> Title: Eng. Geologist <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 />