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Case Closure Summary t'" 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 /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 11,000 NA 250 5.2 Xylene 970 NA 20 0.46 <br /> TPH(Diesel) 2,400 NA <500 <1.0 Ethylbenzene 190 NA 4.0 0.28 <br /> Benzene 39 NA 22 0.012 Oil&Grease NA NA NA NA <br /> Toluene 470 NA 50 0.10 Lead(Pb) 9.67 NA NA NA <br /> MTBE <1.0 NA 0.10 <0.05 <br /> 1,2 DCA 10.36 NA 11.5 10.11 <br /> Comments: SOIL BEFORE CONCENTRATIONS: TPH-g toluene (T), xylene (X); , and MTBE are from MW-1 at 35' on <br /> 7/22/2003- TPH-d is from VW-1 on 812612008; benzene (B) is'from P7 at 45' on 5/23/2002; ethylbenzene (E) is from VW-1 <br /> on 311612005; and 1,2 DCA is from SB-1 at 55' on 311012005. SOIL AFTER CONCENTRATIONS: no results are available. <br /> WATER BEFORE CONCENTRATIONS: TPH-g and T are from VW-1 on 8/26/2008; TPH-d is from MW-1 on 6/22/2006; B, <br /> MTBE, and 1,2 DCA is from MW-1 on 713112_003; E is from MW-1 on 5/25/2005; and X is from MW-1 on 813012006. <br /> WATER AFTER CONCENTATIONS: TPH-g, TPH-d, T, X, E, are from MW-13 on 1212812012; B is from MW-6 on <br /> 12/28/2012,- MTBE is from MW-1 on 6/1/2007; and 1,2 DCA is from MW-1 on 5/21/20`12. <br /> NA=Not Analyzed <br /> 1V. 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 /> MonitoringNapor wells decommissioned: Yes Number Decommissioned-.20 Number retained: 0 <br /> List enforcement actions taken: NORs sent to 2 RPs July 24, 2002 <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature., __ Date: 02/15/2014 v - <br /> ..r <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: 05/23/2013 Response Date: 06/2412013 <br /> RB Staff: James L.L. Barton Response: concurrence <br /> Title: Engineering. Geologist <br /> VII.Additional Comments, Data, etc. <br /> IF-- I <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 />