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Leakinr IInderground Fuel Storage Tank Drogram <br /> Palisades Gas & Wash #835 (Ca e #2) page 2 <br /> 2705 Country Club Blvd, Stockton CA. <br /> San Joaquin County <br /> III Release and Site Characterization Information (continued) Janua 11, 2012 <br /> Maximum Documented Contaminant Concentrations - Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) rWater (ppm)Before After Before After Before After ore After <br /> TPH (Gas) <4. <1. 16.600 <2.0 Ethylbenzene <0.02 0.007 0.0165 <.0005 <br /> TPH (Diesel) NA NA 0.14 <0.05 Xylene <0.02 0.0078 0.0365 <.0005 <br /> Benzene <0.02 0.061 0.344 0.011 MTBE 3.2 0.380 54. 0.44 <br /> Toluene <0.02 <.005 0.0255 <0.0005 TBA 170. 9.1 200. 23. <br /> Comments: No remediation conducted during Case 2 operations. Soil data `before' from CPT-2 and <br /> CPT-3 (2005) and soil "after" from MW-11 to MW-21 installations (2007). Groundwater `before' data from <br /> VEW-3 from 03/12/2002. Groundwater "after" from VEW-3 on either April 5, 2011 or March 17, 2009 <br /> sampling events. <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 uses 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? Yes. Number Decommissioned: 14 <br /> Number retained: 0 <br /> List enforcement actions taken: NOR: July 31, 2002 (Palisades) and June 18, 2007 (Tesoro). <br /> List enforcement actions rescinded: n/a <br /> V. Local Agency Representative Data <br /> Name: Donna Heran, REHS Title: Director, Environmental Health Department <br /> Signature: Date: <br /> L2 j—5 -- Zo Z <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: July 20, 2011 Response Date: August 18, 2011 <br /> RB Staff: James L.L. Barton Response: concurrence to NFA <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> This is Case #2 for this location and started July 31, 2002. See Case #1LGeotracker ID#: — � <br /> T060770052 for data from 1991 to July 30, 2002. <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of <br /> the official site file. <br />