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Case Closure Summary Page 2 <br /> eaking Underground Fuel Storage Tank F am <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) 2,000 4.4 0.770 0.250 Ethyibenzene 7.9 <0.01 .0096 .0018 <br /> TPH (Diesel) <50 <50 NIA -N/A Xylene 140 <0.02 0.-0021 0.0096 <br /> Benzene <0.5 <0.01 0.0037 0.0029 TCE NIA <br /> Toluene 1.1 0.21 0.0086 0.001. PCE N/A <br /> MTBE NIA <.010 <br /> Comments: A SITE ASSESSMENT WAS PERFORMED AND MWS INSTALLED. NO HIGH CONCENTRATION OF <br /> GASOLINE OR DIESEL FOUND IN SOIL BUT, GROUNDWATER HAS BEEN IMPACTED WITH LOW GASOLINE <br /> CONCENTRATIONS. <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? NO <br /> MonitoringNapor wells decommissioned: YES Number Decommissioned: 3 Number retained: O <br /> List enforcement actions taken:. NOR <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN Title: DIRECTOR OF ENVIRONMENTAL HEALTH <br /> Signature: Date: <br /> Vt. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 02/04/98 Response Date: <br /> RB Staff: MARK LIST Response: NO RESPONSE <br /> Title: ENGINEERING GEOLOGIST <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 />