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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 /> Contaminant Soil Before I(ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After - After Before After <br /> TPH (Gas) 6971. 630 270.0 30.0 Xylene 1010 55.0 20.0 0.25 <br /> TPH (Diesel) NA NA NA NA Ethylbenzene 152.0 9.9 2.8 _ 0.085 <br /> Benzene 24.7 5.1 31.0 0.034 Pb 10 NA NA NA <br /> Toluene 442.0 24.0 32.0 0.0093 MTBE NA 0.051 0.25 <0.001 <br /> TAME NA NA 0.020 NA <br /> 1,2-DCA NA NA 0.012 NA <br /> Comments:The Soil Before Concentrations are from removal of UST#2 East at 11' bgs 04/02/1991. The Soil After <br /> Concentr <br /> B 1 at 25abgs 04/16/tions for 1-999:aThre from e Wa e9Be ore Concent anon forE PH glandrom-X are f om B 9 at 25'1 logs 11/29/20 16E-is-from- -� <br /> BTE are <br /> from MW-1 09/30/1994, MTBE is from B-1 04/16/1999, TAME is from DPE-2 11/07/2008, and 1,2-DCA is from DPE-2 <br /> 09/17/2007. The Water After Concentration for TPH-g is from MW1 06/14/2010, BT are from DPE-2 06/14/2010, EX are <br /> from DPE-1 06/14/2010, and MTBE is from MW1 06/14/2010. <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 /> Monitoring/Remediation Wells Decommissioned?Yes Number Decommissioned: 5 Number retained: 10 <br /> List enforcement actions taken: NOR sent to RP <br /> List enforcement actions rescinded: None <br />_ V. Local Agency Representative Data - <br /> Name.`Adrienne Ellsaesser, REHS Title: Acting Program Coordinator <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board RB Notification i <br /> Date Submitted to RB: Response Date: <br /> RB Staff: J. Barton Response: <br /> Title: Eng. Geologist y <br /> VII. Additional Comments, Data, etc. Jf <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />