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s <br /> Case Closure Summary Page e 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 E <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After . Before After <br /> TPH (Gas) 13,000 580 85 1.70 Xylene 1200 <0.50 21 0.021 <br /> TPH (Diesel) Unk. 800 6.80 3.50 Ethylbenzene 160 <0.50 3.20 0.037 <br /> Benzene <25 <0.50 2.70 <0.0005 Oil &Grease NA NA NA NA <br /> Toluene 480 <D.50 10 0.018 Heavy Metals Pb<5.0 Pb<5.0 Unk. Unk. <br /> MTBE <10.0 <0.40 0.850 <0.005 <br /> Comments: <br /> Soil before cont. are from beneath UST-2 (TK2N-15)at time of removal and after conc. are from confirmation boring CB1- <br /> 35 in former UST area. Water conc. before and after are from BMW-4 located in former UST area. Site remediation began <br /> on 07/17/00 (SVE/IAS)and remains in operation at this time pending UST Closure w/no further action. <br /> h <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin an. 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 /> MonitoringNapor wells: 26 Number Decommissioned: 26 Number retained:0 <br /> List enforcement actions taken: NOR sent to RP <br /> i <br /> List enforcement actions rescinded: <br /> W � <br /> V. Local Agency Representative Data <br /> I <br /> Name: Donna Heran, REHS Title: Director <br /> Environmental Health Department tf <br /> Signature: Date: f <br /> VI. Central Valley Regional Water Quality Control Board (RB)Notification k <br /> } <br /> Date Submitted to RB: Response Date: March 4, 2004 <br /> RB Staff:J. Barton Response. Concurrence <br /> Title: Eng Geologist <br /> VII. Additional Comments, Data, etc. <br /> An estimated 14,326 pounds of gasoline were removed via SVE. <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 />