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Case Closure Summary Page 2 <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 (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH(Gas) 9950 <1 0.110 <.05 Xylene 1080 <.005 0.0069 <.0005 <br /> TPH(Diesel) na na na na Ethylbenzene 247 <.005 0.0014 <.0005 <br /> Benzene 0.962 <.005 0.0045 <.0005 Oil S Grease na na na na <br /> Toluene 479 <.005 0.0021 <.0005 Heavy Metals Pb<10 <10 na na <br /> MTBE 160.4 1<.5 10.099 1<.0005 <br /> Comments: The soil results before are from UST system removal under dispenser 6 (DS-6)and the soil after results are <br /> from confirmation boring (VE-3). The groundwater results before are from MW6 on 12/27/01 and groundwater results after <br /> are from MW-5 on 12119102. <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? yes <br /> Site management requirements: none <br /> Should corrective action be reviewed if land use changes? no <br /> Monitoring/Vapor wells decommissioned: yes Number Decommissioned: 6 Number retained: 0 <br /> List enforcement actions taken: level one, NOR sent to RPs <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 List enforcement actions rescinded: na 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 /> wt,,,.- C 3 -v3 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: March 3, 2003 Response Date: March 20, 2003 <br /> RB Staff: J. Barton Response: concur that no further action is required <br /> Title:Assoc Eng 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 />