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Leaking Underground Fuel St rage Tank Program <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) 7400 7.3 0.195 Ethyl-benzene 38 2.0 0.00315 <br /> TPH (Diesel) 480 2.5 0.113 Xyl ene 170 0.290 .000899 <br /> Benzene 2.2 0.650 0.0017 <br /> Toluene 21 0.032 .000597 <br /> Mt3E 10 .017 <0.002 <br /> Comments: NOTE. GROUNDWATER RESULTS IN PARTS F ER MILLION! NO REMEDIATION CONDUCTED. <br /> "Before" soil concentrations from hottest of any boring assoc ated with site. "Before" groundwater concentrations <br /> from first three monitoring wells in early phases of site invest!3ation. "After" groundwater concentrations from <br /> latest and most recent groundwater sampling event of 03-21-01. NO SOIL "AFTER" data. no confirmation borings) <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan? nla <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? nla <br /> Does corrective action protect public health for current land use? No corrective action conducted <br /> Site management requirements: none <br /> Should corrective action be reviewed if land use changes? Not necessary <br /> Have the MonitoringfVapor wells been decommissioned?Yes Number Decommissioned: 8 Number retained: 0 <br /> List enforcement actions taken: NOR, 717194 <br /> List enforcement actions rescinded: none <br /> IS <br /> V. Local Agency Representative Data <br /> a <br /> Name: Donna Heran Title: Director of Envn Health <br /> Signature: ate: 16-19-01 <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> ii <br /> ;I Date Submitted to RB: 713101 Response Date: 7120101 <br /> N RB Staff: Marty HartzellResponse: Concurrence <br /> r <br /> Title: Engineering Geologist <br /> ji VII. Additional Comments, Data, etc. <br /> !� None. <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 /> I` <br /> M 115101 <br />