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TREND ANALYSIS - MW-2 <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) <br /> 0 <br /> Remediation system start-up with SVE using carbon <br /> for vapor abatement, February 17, 2005. <br /> -5 <br /> 10,000 , — <br /> System shut down for upgrades, <br /> December 6, 2007. \ f -10 m <br /> ti <br /> m � <br /> z 4) <br /> 1,000 <br /> = c <br /> 0 <br /> -15 <br /> c � <br /> c 100 - -20 c <br /> U <br /> m r <br /> c <br /> N � <br /> C <br /> m -25 w <br /> 10 ;; <br /> a � <br /> System re-started, July 30, 2008' -30 c <br /> 1 � <br /> -35 <br /> Note: Top of casing elevation = 11.39 feet - msl. <br /> 0 -40 <br /> �C o`O o`O o^ o� ow 4, <br /> cb <br /> -�-TPHg Aff-- Benzene —4—Groundwater Elevation -Top of Well Screen <br /> 01231-154 <br /> GF(�(l�A Fniirnnmer+i <br />