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r r r r r r r r r r r r r rr r r r r r <br /> TREND ANALYSIS - MW-4 <br /> TPHg/Benzene Concentrations & Groundwater Elevations vs. Time <br /> (Since January 1, 2005) <br /> 5400 and 5606 Pacific Avenue, Stockton, California <br /> 100,000 Chevron Site #306620 (Former Unocal #5098) 0 <br /> Remediation system start-up with SVE using carbon <br /> for vapor abatement, February 17, 2005. System re-started, July 30, 2008. <br /> �i -5 <br /> 10,000 <br /> System shut down for upgrades, -10 m <br /> December 6, 2007. <br /> cmz <br /> 1,000 -15 <br /> o ea <br /> E <br /> -20 <br /> c <br /> 0 100c <br /> v <br /> -25 <br /> N <br /> W <br /> d � <br /> m 10 -30 <br /> a' 3 <br /> -35 <br /> ri 1 <br /> -40 <br /> Notes: Non-detect analytical results shown at their detection limit with an open symbol. <br /> F <br /> Top of casing elevation = 11.50 feet - msl. <br /> 0 -45 <br /> No �o`O �o^ �o� goo R' <br /> �o <br /> TPHg –AMBenzene —0 Groundwater Elevation -Top of Well Screen <br /> 01231-154 AECOM Environment <br />