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Case Closure Summary Page 4 <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) 91,000 NA 250 5.2 Xylene 970 NA 20 0.46 <br /> TPH (Diesel) 2,400 NA <600 0.0 Ethylbenzene 190 NA 4.0 0.28 <br /> Benzene 39 NA 22 0.012 Oil&Grease NA NA NA NA <br /> Toluene 470 NA 5o 0.10 Lead(Pb) 9.67 NA NA NA <br /> MTBE. <1.0 NA 0.10 <0.05 <br /> 1,2 DCA D.36 NA 1.5 0.11 <br /> Comments: SOIL. BEFORE CONCENTRATIONS: TPH-9 toluene (T), xylene (X), , and MTBE are from MW-1 at 35' on <br /> 712212003; TPH-d is from VW-1 on 8/26/2008; benzene (B) is from P7 at 45' on 512312002; 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 812612008; TPH-d is from MW-1 on 612212006; B, <br /> MTBE, and 1,2 DCA is from MW-1 on 7/3112003; E is from MW-1 on 512512005; and X is from MWA on 813012006. <br /> WATER AFTER CONCENTATIONS: TPH-g, TPH-d;T, X, E, are from MW-13 on 12/28/2012; B is from MW-6 on <br /> 12/2$12012; MTBE is from MW-1 on 6/112007; and 1,2 DCA is from MVV-1 on 5/21/2012. <br /> NA=Not Analyze I <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: None <br /> Should corrective action be reviewed if land use changes?Yes <br /> MonitoringfVapor wells decommissioned: Yes Number Decommissioned:2 Number retained:18 <br /> :L <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 List enforcement actions rescinded: NA 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: Adrienne Ellsaesser, REHS Title: Program Coordinator <br /> Signature: Date: <br /> VI. Centra Valley Re ional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton Response. <br /> Title: En ineerin . Geologist <br /> VII. Additional Comments, Data, etc. <br /> This document 4nd the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />