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r-IL <br /> t <br /> Case Closure Summary Page'%W <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) 2000 2000 27.9 1.9 Xylene 100 100 8.61 .150 <br /> TPH(Diesel) 4800 4800 6.73 <.050 Ethylbenzene 11 11 1.14 .030 <br /> Benzene <1.2 <1.2 <,05 <.0005 Oil&Grease <br /> Toluene 1.7 1.7 .143 <.0005 Heavy Metals Pb15 15 <br /> MTBE <1 <1 <.05 <002 <br /> Comments: Above soil data before and after is taken from soil boring S138-25', except lead is from SB6-5'. No soil <br /> remediation was performed. Water Before levels are from MW2 on 1129199. Water After levels are from MW2 on 4112102. <br /> 7500 gallons of groundwater were removed. Five on site MWs destroyed on 11125102. <br /> 1V. 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: 5 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 List enforcement actions rescinded: 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: 1 o,_02— <br /> VI. <br /> ZVI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 09/04/02 Response Date: 09/23/02 <br /> RB Staff: M. Hartzell Response: Closure concurrence <br /> Title:Assoc En Geolo ist <br /> VII. Additional Comments, Data, etc. <br /> 11 Groundwater contamination localized near MW#2, no benzene detected. <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 />