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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> Former Western Lift—Case 2—3430 South EI Dorado Street, Stockton, California 95206 <br /> III. Release and Site Characterization Information continued <br /> Maximum Documented Contaminant Concentrations-- Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 8,170 NA 561 4.2 Xylene 668 NA 45 0.24 <br /> TPH (Diesel) 5,730 NA <0.050 NA Ethylbenzene 103 NA 6.21 0.062 <br /> Benzene 48 NA 22.5 1.2 Oil&Grease NA NA NA NA <br /> Toluene 316 NA 36.2 0.10 Lead 12 NA NA NA <br /> MTBE 1<50 1 NA I NA NA <br /> Comments: Soil Before Concentrations:. TPH (Gas), benzene, toluene, ethylbenzene, and xylene are from soil boring <br /> B10-40 at 40' on 3/12/1997; TPH (Diesel), MTBE and lead are from soil boring B1-10 at 10' collected on 06/25/1996. - -Soil <br /> After Concentrations: No soil after sample results are available. Water Before Concentrations: TPH (Gas), <br /> ethylbenzene, and xylene are from MW-7 collected on 9/15/1998; TPH (Diesel) and toluene are from MW-7 collected on <br /> 3/13/1998; and benzene is from MW-8B collected on 9/1/2004. Water After Concentrations: TPH (gas) and benzene are <br /> from MW-8A collected on 12/27/2012; toluene, ethylbenzene, and xylene are from MW-7 collected on 12/27/2012. <br /> NA= not analyzed <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: 16 Number retained: 0 <br /> List enforcement actions taken: NORs sent to RPs on 8/31/2012 <br /> List enforcement actions rescinded: NA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: - Date: May 5, 2014 <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: July 1, 2013 Response Date: July 24, 2013 <br /> RB Staff: James L. L. Barton Response: Concurrence <br /> Title: Engineering. Geologist <br /> VII. Additional Comments, Data, etc. <br /> Case#2 is located in northern area of the site. This area was remediated using SVE/IAS. In GeoTracker, Case#1 and <br /> Case#2 information for this site maybe comin led. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />