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Case Closure Summary Pagf <br /> Y �eaking Underground f=uel Storage Tank ram <br /> III 4 Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> m Water FN/AEthylbenzene. <br /> ontaminant Soil {ppm) Water (ppm) <br /> 7n1anant Soil {pP ) Before After Before After <br /> Before After Before <br /> s) 3,000 1,800 N1A ylene230 99.0 NIA NIA <br /> TP ( esel) 40,000 12 NIA 30 10.0 NIA NIA <br /> Benzene .0083 <.005 NIA il &Grease NIA NIA NIA NIA <br /> Toluene 17 .006 NIA NIA Heavy Metals Pb 9.1 9.1 NIA NIA <br /> TBA 120.0 12.0 NIA NIA MISE 28.0 4.9 NIA NIA <br /> Comments FIRST GENERATION USTs REMOVED IN EARLY 1984; NO INFORMATION OR ANALYTICAL RESULTS <br /> AVAILABLE. NUMEROUS SOIL BORINGS COMPLETED PRIOR TO 2ND GENERATION UST REMOVALS IN 1998. <br /> SOIL CONTAMINATION WAS REMOVED IN 1998, BUT GASOLINE AND MTBE REMAINS IN PIPING TRENCHES AND <br /> TANK FIELD. <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•Regionai Board Basin Plan? YES <br /> Does corrective action protect public health for current land use? YES <br /> Site management requirements: <br /> Should corrective action be reviewed if land use changes? YES <br /> Monitoring/Vapor wells decommissioned: Number Decommissioned: N/A Number retained: NIA <br /> List enforcement actions taken: LEVEL ONE, NOR SENT TO RESPONSIBLE PARTIES <br /> List enforcement actions rescinded: <br /> V. Local Agency Representative Data <br /> VISING REH5ISITE MITIGATION-LOP UNIT <br /> Name: MARGARET LAGORIO TIt1e:SUPER <br /> Signature: Date: c�`$ <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: MARK LIST Response: <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> POST 2ND GENERATION UST REMOVAL SUMMARY <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 />