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III Release and Site Characterir�m Information (continued) 4�( 1 <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup I <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 '9 2.4 ND ND ND <br /> Benzene ND ND ND ND <br /> Toluene ND ND ND ND <br /> 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. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? YES <br /> I <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 I <br /> Should corrective action be reviewed if land use changes? No <br /> V <br /> Monitoring/Vapor wells decommissioned: No Number Decommissioned: 0 Number retained: 3 <br /> r <br /> List enforcement actions taken: NOR dated 9/18/91 I' <br /> i <br /> List enforcement actions rescinded:. None <br /> f <br /> V. Local Agency Representative Data i <br /> i <br /> Name: Donna Heran Title: Director of Environmental Health <br /> I I <br /> Signature: Date: <br /> I <br /> it <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Brathovde Response: <br /> Title: Assoc Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> i <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 /> 1 <br /> if <br /> ;i <br />