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TREND ANALYSIS - MW-3 <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 0 <br /> Remediation system start-up with SVE using ystem shut down for j <br /> carbon for vapor abatement, February 17, 2005. 1 irst rebound pulse. —� <br /> AS shut down for third 5 <br /> rebound pulse. <br /> 10,000 <br /> stem s ut down for <br /> econd re ound pulse. -10 j <br /> J N <br /> C) N <br /> 1 N <br /> 1,000U) <br /> ----------- -15 c <br /> o m <br /> d <br /> R E <br /> m -20 m <br /> U <br /> 0 100 0 <br /> U <br /> d System shut down for upgrades, 25 y <br /> N December 6, 2007. 0 w <br /> c <br /> co <br /> m <br /> 10 -30 3 <br /> a Upgraded system re-started, <br /> ~ July 30, 2008. <br /> -35 fog <br /> 1 <br /> I <br /> El -40 <br /> Note:Non-detect analytical results shown at their detection limit with an open symbol. <br /> 0 Top of casing elevation= 10.59 feet-msl. I I I I I -45 <br /> cb Oh 00 O^ qu 00 �O <br /> c c c c c c c <br /> TPHg —0--Benzene --0--Groundwater Elevation Top of Well Screen <br /> 60146576 2 of 7 AECOM <br />