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T Case Closure Summary Pie 2 <br /> � Leaking Underground Fuel Storage Trogram <br /> III Release and Site Characterization Information (continued) V <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 /> ITPH(Gas) Soo 350 so 3 Ethylbenene <1 2.7 .21 .028 <br /> TPH(Diesel) 1100 160 66 9.6 Xylene 48 11 .54 .360 <br /> Bermene 5.3 .082 .870 .0018 <br /> Toluene 23 .92 .760 .0021 MTBE NA .024 <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 7/2/97. <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: 0 Number retained: 4 <br /> List enforcement actions taken: NOR 8/10/89 <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: Margaret Lagorio Title: Supervising REHS <br /> Signature: Date: (d <br /> VI. Central Valley Regional Water Qual-iTy Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: P.Anderson Response: <br /> Title: t <br /> VII. 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 />