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s <br /> Case Closure Summary Pag <br /> Leaking Underground Fuel Storage Tank Program <br /> !1! Release and Site Characterization Information (continued) <br /> E <br /> cumented Contaminant Concentrations - -Before and After Cleanup <br /> Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> 2.1 2.1 8.4 6.0 Xylenes <0.005 <0.005 0.150 0.0228 <br /> TPH(Diesel) 10 10 2.0 2.0 Ethylbenzene <0.005 <0.005 0.012 0.0098 <br /> Benzene <0.005 <0.005 <0.0005 <0.0005 Oil &Grease NA NA NA NA <br /> Toluene <0.005 <0.005 <0.0005 <0,0005 Heavy Metals NA NA Pb=0.0071 0.0071 <br /> MTBE <0.005 <0.005 0.310 <0.001 <br /> Comments: The soil before and the soil after concentrations are from soil borings B1-5 in the former UST area and 136-5 <br /> west of MW4. In August 2009, 15,000 gallons of water were extracted/pumped from MW4. The ground water before <br /> concentrations are from MW4 sampled on 07/31/2008 before ground water extraction. The ground water after <br /> concentrations are from MW4 sampled on 04/02/2010 after ground water extraction. The lead results are from a ground <br /> water sample collected at the time of UST removal.. <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: NA <br /> Should corrective action be reviewed if land use changes? Yes <br /> Monitoring/Vapor wells Decommissioned: Yes Number Decommissioned: 7 Number retained: 0 <br /> List enforcement actions taken: NOR sent to RP <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: Date: <br /> /l <br /> VI. Central Val R ional W ter Q al ityFControl.Board RB Notification <br /> Date Submitted to RB: 12/06/2010 Response Date: 1/14/2011 <br /> RB Staff: J. Barton Response: No Further Action Required <br /> Title: Eng. Geologist <br /> VII. Additional Comments, Data, etc. <br /> F_ <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />