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s s r rsr �s s s s s � s s +■` s s s Is s s <br /> TREND ANALYSIS - MW-2 <br /> TPHg/Benzene Concentrations & Groundwater Elevations vs. Time <br /> (Since January 1, 2005) <br /> 5606 Pacific Avenue, Stockton, California <br /> Chevron Site #306620 (Former Unocal #5098) <br /> 100,000 ystem shut down for 0 <br /> Remediation system start-up with SVE using carbon First rebound pul-- <br /> for vapor abatement, February 17, 2005. AS shut down for third <br /> rebound pulse. <br /> 10,000 System shut down for -5 <br /> second rebound pulse. <br /> System shut down for upgrades, <br /> December 6, 2007. i <br /> J 10 m <br /> 0) N <br /> 1 N <br /> 1,000 IM I c <br /> O N <br /> 15 <br /> c d <br /> d m <br /> U �- <br /> 0 100 -20 0 <br /> U <br /> m R <br /> c > <br /> N N <br /> C W <br /> m -25 <br /> Cal d <br /> 10 is <br /> za Upgraded system re-started, 'a <br /> I— July 30, 2008. 10j <br /> -30 O <br /> 0 <br /> 1 <br /> -35 <br /> 'INote:Non-detect analytical results shown at their detection limit with an open symbol. <br /> 0 Top of casing elevation=11.39 feet-msl. <br /> 40 <br /> I o� o� <br /> I o°j ^o <br /> c c c c c c <br /> TPHg f Benzene f Groundwater Elevation Top of Well Screen <br /> 60146576 1 of 7 AECOM <br />