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a- t:aseClosureSummaryPage2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information(continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup I, <br /> Contaminant soil (ppm) Water (ppm) CoMwninant Soil (ppm) Water, <br /> Before Atter Before After Before After Before Attar II <br /> TPH(Gas) 500 350 80 3 FAWbenene <1 2.7 .21 .028 I� <br /> TPH(©lesel) 1100 160 66 9.6 Xylem 48 11 .54 .360 �I <br /> Benzene 5.3 .082 .870 .0018 !! <br /> Toluene 23 .92 .760 .0021 MTBE NA .024 II <br /> Comments: The soil before concentrations are from soil samples collected at the time the tanks were removed. The soil <br /> after concentrations are from a sidewall sample after the August 1993 excavation of contaminated soil. Groundwater <br /> concentrations before are from MW1 on 1/9!90. Groundwater concentrations after are from MW1 on 7/Z97. <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? Yes <br /> Monitoring/Vapor wells decommissioned: No Number Decommissioned: 4 Number retained: 0 <br /> List enforcement actions taken: NOR 8/10/89 <br /> List enforcement actions rescinded " <br /> I' <br /> V. Local Agency Representative Data <br /> Name: Donna Heran Title: Director of Environmental Health <br /> Signature: Date: i 6-q 7 <br /> VI. Central V ey Regional Water Quality Control Board(RB) Notification <br /> Date Submitted to RB: 10/27/97 Response Date: 11/24/97 <br /> RB Staff: P. Anderson Response: Concurrence <br /> Title: <br /> VII. Additional Comments, Data,etc. <br /> This document and the related CASE CLOSURE LETTER,Shall be retained by the bad agency as part of the official <br /> site file. <br />