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Case Closure Summary Page <br /> �aking Underground Fuel Storage Tank Progiam <br /> III Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> P <br /> inant Soil (ppm) Water (ppm) <br /> Contaminant Soil (ppm) Water (pPm) <br /> Before After Before After Before After Before After <br /> <.005 NA <,0005 <br /> as) NA NA NA NA Xylene NA <.005 NA <.0005iesel) 11 <5 .240 <.05 Ethylbenzene NAe NA <.005 NA <.0005 Oil &Grease NA NA NA NAe NA <br /> <.005 NA <.0005 MTBE NA <.05 NA <.0005 <br /> Comments: Soil Before results are from geoprobe GP4 on 12/20/04 and the analysis was for TPH-diesel only. Soil After <br /> results are from the monitoring wells installed in September 2006. Water Before results are from GP1 on 12/20/04 and the <br /> analysis was for TPH-diesel only. Water After results are from the monitoring wells on 10/27/06. <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:No Number Decommissioned: 0 Number retained:3 <br /> List enforcement actions taken: NOR sent to RP. <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagono Title: REHS, Program Coordinator <br /> Signature: Date: S5/07 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Barton Response: <br /> Title: Eng. Geologist <br /> VII. Additional Comments, Data, etc. <br /> Contamination in geoprobe samples was not confirmed from the monitoring well investigation. <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 />