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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 /> TPN (Gas) 4300 .180 <.05 Xylene 270 .016 <.0005 <br /> TPH(Diesel) Ethylbenzene 37 .0041 <.0005 <br /> Benzene 10 .014 <.0005 Oil &Grease <br /> Toluene 58 .021 <.0005 Organic Pb ND <br /> MTBE NA .068 <.005 <br /> Comments: Soil results are from the sample collected at the time of UST removal (T2-S). No soil sample results are <br /> available after excavation and vapor extraction. Groundwater results Before and After are from VEW-1 in the source <br /> (former UST area) near T2-S. Water samples from all 4 monitoring wells have been non detect(ND) since August 1999, <br /> All MWs and VEWs destroyed on 11122102. <br /> NA= Not Analyzed <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 R.P. <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: - Date: (3 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 10/04/2002 Response Date: 10/29/2002 <br /> RB Staff: M. Hartzell Response: Closure concurrence <br /> Title: Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> f� <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 />