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j <br /> Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Ill. Release and Site Characterization Information(continued) <br /> Maximum Documented Contaminant Concentrations--Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH(Gas) 6200 3130 0.516 <.05. Xylenes 730 194 0.057 <.0003 <br /> TPH(Diesel) NA NA NA NA Ethylbenzene 140 30.4 0.01 <.0003 <br /> Benzene 2.64 NO 0.062 <.0003 Oil&Grease NA NA NA NA <br /> Toluene 220 1.9 0.042 <.0003 Heavy Metals NO NA NA NA <br /> MTBE 8.0 NO 0.22 <.0005 <br /> Comments:Soil before results from piping removal resamples. Sal after results from confirmation soil borings, prior to the <br /> final ehase of remediation. Water before results from MW 1 on 4118100. Water after results from MW on 11126104. <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?YES <br /> Monitoring/Vapor wells decommissioned: 8 Number Decommissioned: 8 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERAN, REHS Title: DIRECTOR, ENVIRONMENTAL HEALTH DEPT. <br /> Signature: 1- Date: -� <br /> 2-Z —05 <br /> Vt. Central Valley Regional Water Quality Control Board(RB)Notification <br /> Date Submitted to RB: 7113105 Response Date: 71281105 <br /> RB Staff: JAMES L.L. BARTON Response: CONCURRENCE <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> 1Estimated mass of 1,013 gallons TPH-g removed from the vadose zone of the site by soil vapor extraction. An estimated <br /> 56 gallons of TPH-g remains in the soil. <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 />