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i <br /> Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information (continued) i <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) 21,000 <1 <.05 Ethylbenene 3.8 <.005 <.0005 <br /> TPH (Diesel) 3,800 62 <.05 Xylene 6.5 x.005 <.0005 <br /> Benzene <1.5 <.005 <.0005 <br /> Toluene <1.5 c005 <.0005 MTBE 27 14 <.001 <br /> w <br /> Comments: All levels in ppm. Soil Before levels from UST removal samples on 12130198. Soil After levels are from <br /> excavator on 2119199. Groundwater Before levels are from 132 grab sample on 2120101. Soil remediation was removal of 90 <br /> cubic yards of contaminated soil on 2119199. <br /> IV. Closure I; <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 C <br /> Should corrective action be reviewed if land use changes? Yes <br /> P <br /> Monitoring/Vapor wells decommissioned: No Number.Decommissioned: 1 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: :Donna Heran Title: Director of Environmental Health <br /> Signature: - - Date: .3-U3 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 10/23/02 Response Date: 11/22/02 <br /> RB Staff: Marty Hartzell Response: Concurrence <br /> Title: Associate Engineering Geologist <br /> VIE. 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 /> . a <br />