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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Ill Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations - - Before and After Cleanup <br /> m Contaminant Soil (ppm) Water (ppm) <br /> Contaminant Soil (ppm) Water (ppm) Before After Before After <br /> Before After Before After 1.4 A039 A039 <br /> Na Na Na Na Xylene 1.4 <br /> TPN (Gas) 4.30 Eth (benzene .037 .037 <0.005 <0.005 <br /> TPH (Diesel) 6,900 6,900 4.30 y Na Na Na <br /> <0.02 <0.02 <.0005 <.0005 Oil &Grease Na <br /> Benzene Na Na <br /> Toluene <0.02 <0.02 0.0017 0.0017 Heavy Metals Na Na <.0005 <.0005 <br /> MTBE <1.0 <1.0 <br /> Comments: Only soil and groundwater investigation conducted; no remediation occurred at this site. Soil concentrations are <br /> from geoprobe B-1 in source area identified at time of UST removal. Groundwater concentrations are from HP-1 near <br /> release area outside former tank location. <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: Na <br /> Should corrective action be reviewed if land use changes?Yes <br /> MonitoringNapor wells decommissioned: Na Number Decommissioned: Na Number retained: 0 <br /> List enforcement actions taken: NOR sent to RP. <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHSISite Mitigation/LOP Unit IV <br /> Date: 03/12/04 <br /> Signature: <br /> Vl, Central Valley Regional Water Quality Control Board (RB) Notification <br /> EStaff: <br /> ed to RB: <br /> Response Date: <br /> Barton <br /> Response: <br /> eolo ist <br /> VII. Additional Comments, Data, etc. <br /> No active remediation occurred at this site. <br /> This document and the related CASE CLOSURE LETTER, <br /> Shall be retained by the lead agency as part of the official <br /> site file. <br />