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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III Release and Site Characterization Information(coati ed) <br /> Maximum Documented Contaminant Concentrations Before and After Cleanup <br /> Contaminant: Sail (ppm) Water {ppm) Contaminant loil (Ppm) Water (ppm) <br /> Before. After,. Before After Before After Before After <br /> ,TPH(Gas) 7000 c7 .130 <.050 Xylene 5911 <0.005 0.0095 <0.0005 <br /> TPH (Dieidl) rta na na na Ethylbenzene 90 <0.005 0.0014 <0.0005 <br /> Benzene 3.5 :<0.005 <0.0005 <0.0005 Oil&Grease nana na na <br /> Toluene <50, <0.005 0.0019 <0.0005 Heavy Metals Pb 11, ha 0 na <br /> MTBE 0.024 <0.005 0...0024: <0.0005 <br /> Comments: The soil before values are from a sample collected at the time of UST removal at 14 ft,.BGS. The soil after <br /> values are from soil.:bating (SBA)at 80 ft. BGS near UST release. The before values for water are from a grab,water <br /> sample at,80feet fr6rh SS-1, except MTBE is from MW-3 on 9118/03 which is the neatest well to SSI the area Of release,. <br /> The after values for water are from downgradient MW-1. 60 cubic yards of soil was removed from the.south.pMend.6f the <br /> western dis ensers and re mediated on site. No other active remediation has occurred at this site. <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 theRegional Board Basin Plan?Yes <br /> Does corrective-,action protect ipublic.health for current land use? Yes <br /> Site management requirements:..none <br /> [ShoWd corrective.action bereviewed if land use changes?No <br /> Monitoring/Vapor W004 0 commissioned:0 Number.Decommissioned: 0 Number retained.: 4 <br /> .......... <br /> List enforcementaction_;Jaken. Levelone, NOR sent to RP <br /> List enforcementzctionsMsci;ded.mone <br /> V. Local Agency Re <br /> pr"entative:Data:. <br /> Name: MargaretLagorio Title: Supervising REHS/Site Mitigation/LOPUnit IV <br /> [Slqnature: Date: A q <br /> .......... <br /> VI. Central.Valley RpolonalVater Quality Control Board (RB)Notification <br /> Date Submitted to RB! Response,:0ate-W.- <br /> -RB Staff:J.Barton Response-.. <br /> Title:Assoc Eng.GeoI2&( <br /> VII. Additional Comments, Data,etc. <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 />