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TREND ANALYSIS - MW-11 <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 /> System shut down for I '�, I, <br /> Hirst rebound pulse. — <br /> �_Remediation system start-up with SVE using carbon for <br /> vapor abatement, February 17, 2005. System shut down for 5 <br /> second rebound pulse. <br /> 10,000 <br /> 10 <br /> AS shut down for third2 <br /> J — <br /> rebound pulse. <br /> z d <br /> 1,000 -15 c <br /> o <br /> m <br /> r E <br /> L <br /> Y Y <br /> m -20 w <br /> O 100 - <br /> U O <br /> 16 <br /> °7 -25 > <br /> NSystem shut down for upgrades, <br /> December 6, 2007. w <br /> d <br /> 10 -30 3 <br /> = a <br /> a � <br /> H 0 <br /> Upgraded system re-started, I -35 <br /> July 30, 2008. - <br /> 1 <br /> -40 <br /> INotes:Non-detect analytical results shown at their detection limit with an open symbol. <br /> Top of casing elevation=11.29 feet-msl. <br /> 0 -45 <br /> Oh p0 O^ 0cb QO �O <br /> ��c cmc c c <br /> f TPHg -f-Benzene f Groundwater Elevation Top of Well Screen <br /> 60146576 6 of 7 AECOM <br />