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i <br /> Case Closure Summary Page 2 I <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) 9 <1 <.05 Ethylbenene .03 <.005 <.0005 <br /> TPH(Diesel) 100 <1 .089 Xylene .440 <.005 <.0005 <br /> Benzene .0077 <.005 <.0005 <br /> Toluene <.005 5.005 <.0005 PCE .048 <.005 .0016 <br /> MTBE NA <.005 <.005 <br /> Comments: Soil Before results are from beneath the 12,000 gallon UST's removed in 1995, except the PCE which is from <br /> below the waste oil piping closed in place on 3/21101. The Soil After results are from soil boring B1 drilled on 3117/00, <br /> except for PCE which is from SB1 drilled on 214102. Water Before results are from grab water from B1 drilled on 3/17100, <br /> except PCE which is from grab water from SB1 drilled on 214/02. No remediation was performed and there are no water <br /> after results. <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? Yes <br /> MonitoringfVapor wells decommissioned: NA Number Decommissioned: Number retained: <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHS <br /> Signature: Date: <br /> t!nnf�,� f <br /> VI. Central Valley Regional Water Quality Con rol Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: Marty Hartzell Response: <br /> Title:Associate Engineering Geologist <br /> Vll. 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 />