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• n Leaking Underground Fuel Storage Tank Program <br /> I <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) 290 ND ND ND Ethylbenene 1.6 ND ND ND <br /> TPH (Diesel) 6,900 ND .150 ND Xylene i' 2.4 ND ND ND <br /> Benzene ND ND ND ND ` <br /> Toluene ND ND ND ND MTBE 00051 <br /> Comments <br /> Soil before are results from soil samples collected at the time of the tank removals. <br /> Soil after are results from soil samples collected from soil borings. <br /> Remediation was not required. <br /> Confirmation sampling for MTBE was not done at the monitoring well where it was originally detected. The City of Manteca <br /> Municipal Well#13 was sampled instead. p <br /> :i <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 /> 4 <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 /> Monitoring/Vapor wells decommissioned: YES Number Decommissioned: 3 Number retained: 0 <br /> t <br /> List enforcement actions taken: NOR dated 9/18/91,_ <br /> List enforcement actions rescinded:. None <br /> 'f <br /> V. Local Agency Representative Data <br /> I <br /> Nam . Donna H Title: Director of Environmental Health <br /> i <br /> Si tures Date: '/1), <br /> Ucr/ P/ <br /> V.Central Valley Regional Water Quality Control Board (RB) Notificationi <br /> Date Submitted to RB: �Iallcl Resporise Date: I (g `cls <br /> RS Staff: J. Brathovde Response: Concurrence t <br /> Title: Assoc Eng Geologist <br /> i <br /> VII. Additional Comments, Data, etc. <br /> i F <br /> his document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />