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TREND ANALYSIS - MW-6 <br /> TPHg/Benzene Concentrations & Groundwater Elevations vs. Time <br /> (Since January 1, 2005) <br /> 5400 and 5606 Pacific Avenue, Stockton, California <br /> 10,000 Chevron Site #306620 (Former Unocal #5098) 0 <br /> Remediation system start-up with SVE using carbon <br /> for vapor abatement, February 17, 2005. <br /> System shut down for upgrades, _5 <br /> December 6, 2007. <br /> 1,000 <br /> -10 <br /> J � <br /> IM <br /> Z 4) <br /> _ -15 c <br /> o <br /> 100 E <br /> m -20 m <br /> Q o <br /> _ System re-started, July 30, 2008. -25 <br /> N 10 <br /> _ W <br /> d L <br /> d <br /> 00 <br /> z -30cc <br /> 3 <br /> 0- <br /> � c <br /> 1 -35 <br /> Notes: Non-detect analytical results shown at their detection limit with an open symbol. -40 <br /> Top of casing elevation = 11.05 feet - msl. <br /> 0 -45 <br /> IN\\off \Oh \off -00 <br /> \Z� Ali .06 <br /> -� -TPHg —s-- Benzene —0 Groundwater Elevation — -Top of Well Screen <br />