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'i <br /> Case Closure.Summary.Page 2 <br /> Leaking Underground Fuel Storage Tank'Program. <br /> III Release and.Site Characterization Information (continued) <br /> Maximum Documented.Contaminant Concentrations--Before and After Cleanup <br /> ater <br /> Contaminant Soil {ppm} Water (ppm) Contaminan734 <br /> ollBefore After Before After. efore After.} Before After.Water )TPH(Gas} 2600. FPPH <.05 Xylene 0 FPPH <.0005TPH(Diesel) NA NA NA EthylbenzenFPPH <.0005.Benzene 11 FPPH <.0005 Oil &Grease00 FPPH NA <br /> Toluene 110. FPPH <.0005 Heavy Metals Pb16- NA <.0005 <br /> MTBE NA 2.160 <br /> Comments:.Soil Before results are.from the.UST removal samples in July 1993..Soil samples were not collected and. <br /> analyzed after remediation.. Groundwater Before and After results are from MW-3 near the former UST location.(source <br /> area)which had free.phase petroleum hydrocarbons (FPPH)on 1123192.and was non detect on 312105. Soil excavation and. <br /> soil vapor extraction/air,sparging removed 3,617 pounds of gasoline during remediation..Less.than 1 pound of gasoline <br /> mass is estimated to.remain.beneath the site and will continue to degrade over time.. <br /> IV. Closure ;r <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.BasinPlan?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 :.24...Number;Decommissioned: 24.... . Number retained: 0. t <br /> List enforcement actions taken: NOR sent to RP <br /> Y <br /> List enforcement actions rescinded:.NA. <br /> V..Local Agency.Representative.Data <br /> Name:.Donna Heran Title: Director.of.Environmental Health. <br /> � t <br /> Signature: Date: <br /> VI..Central Valley Regional Water Quality Control Board (RB)Notification <br /> Date Submitted to RB:. 5113105. Response Date: 6123105. , <br /> RB Staff: J. Barton. Response: No Further.Action Required Concurrence <br /> Title: Eng. Geologist <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 />