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Leaking Underground Fuel Storage Tank Program <br /> Ultramar-Beacon #3641 <br /> 1210 East Hammer Lane, Stockton <br /> III Release and Site Characterization Information continued November 2011 <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) 15,000 14 <0.050 Ethyl-benzene 410 .51 <0.0005 <br /> Benzene 425 4.4 <0.0005 Xylene 2,100 1.3 <0.0005 <br /> Toluene 1,500 1.2 <0.0005 MTBE 76 1.2 <0.0005 <br /> Comments: Soil `before' samples from MW-1 sample "S-35-B2", July 1996. * No soil sampling in <br /> same area since 1996. * Water `before' from MW-1, November 1996. Water `after' from MW-1, <br /> December 2010. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial use per 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 /> Have the MonitoringNapor wells been decommissioned? Yes <br /> Number Decommissioned: 23 casings in 18 boreholes (3 wells double nested, 1 well triple nested) <br /> Number retained: 0 <br /> List enforcement actions taken: NOR, October 30, 1995 <br /> List enforcement actions rescinded: NIA <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director <br /> Signature: Date: <br /> VI. Central Valley Regional Water Quality Control Board RB Notification <br /> Date Submitted to RB: January 6, 2012 Response Date: January 24, 2012 <br /> RB Staff: James L.L. Barton Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> Remediation, SVE, was active from 2005 to 2009 <br /> This documer:t and the related CASE CLOSURE LETTER shall be retained by the lead agency as part <br /> of the official site file. <br />