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Case Closure Summary <br /> 3012 E.Waterloo Road, Stockton, CA 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) 500 NA 4,300 1.1 Xylene 6.3 NA 1,350 0.00315 <br /> TPH (Diesel) 110 NA NA NA Ethylbenzene <0.017 NA 330 0.0021 <br /> TPH(Motor Oil) NA NA NA NA Lead (Pb) 180 NA NA NA <br /> Benzene <0.003 NA 220 <0.0005 MTBE <0.05 NA 310 <0.0005 <br /> Toluene <0.017 NA 800 <0.0005 1,2, DCA NA NA <5.0 <0.0005 <br /> Comments:Soil Before: TPHg taken from B1-25 at 25 feet bsg on 7/19/2004. Benzene and MTBE taken from (Tank)TK-3-S <br /> at 15 feet bsg on 9/23/1998. Toluene and ethylbenzene taken from B2-45 at 45 feet bsg. Xylene taken from B1-25 at 25 feet <br /> bsg. Lead and TPHd taken from waste oil tank removal spoils on 12/10/1998. TPHmo and 1,2 DCA not analyzed. Soil <br /> After: No soil after data available. No active remediation was conducted at this site. Groundwater Before: TPHg, benzene, <br /> toluene, ethylbenzene, xylene and MTBE taken from MW-2 on 11/10/2005. 1,2 DCA taken from MW-2 on 4/26/01. TPHd, <br /> TPHmo and lead not analyzed. Groundwater After: TPHg, benzene, toluene, xylene, ethylbenzene, MTBE and 1,2 DCA <br /> taken from MW-1 on 12/17/2012. TPHd, TPHmo and lead not analyzed. 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? No Number Decommissioned: 0 Number retained: 3 <br /> List enforcement actions taken: NOR: 8/31/2004 <br /> List enforcement actions rescinded: None <br /> V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser Title: Program Coordinator <br /> Signature: ��`� Date: 1,4 <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> F_ <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file. <br />