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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 1 <0.0005 MTBE 76 1.2 <0.0005 <br /> Comments: Soil 'beforesamples 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 Monitoring/Vapor wells been decommissioned? No Number Decommissioned: 0 <br /> Number retained: 23 casings in 18 boreholes. 3 wells double nested, 1 well triple nested <br /> List enforcement actions taken: NOR, October 30, 1995 <br /> List enforcement actions rescinded: n/a <br /> V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser, REHS Title: Acting LOP Program Coordinator <br /> Si nature: �,�� Date: ////g// <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 /> Remediation, SVE, was active from 2005 to 2009 <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part <br /> of the official site file. <br />