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Illr Illlr r r r r Ir r Illlr r r Illr r r Ilr Illr r Illr r <br /> TREND ANALYSIS - MW-25D <br /> TPHg/Benzene Concentrations & Groundwater Elevations vs. Time <br /> (Since January 1, 2005) <br /> 5400 and 5606 Pacific Avenue, Stockton, California <br /> Chevron Site #306620 (Former Unocal #5098) 0 <br /> 100,000 <br /> Remediation system start-up with SVE using carbon <br /> for vapor abatement, February 17, 2005. <br /> -10 <br /> 10,000 _ <br /> System re-started, July 30, 2008. m <br /> m <br /> H <br /> = 1,000 -20 <br /> O <br /> r <br /> V _ <br /> -30 <br /> 0 100 <br /> v � <br /> c System shut down for upgrades, <br /> nOi December 6, 2007. W <br /> c `m <br /> -40 <br /> CM <br /> 10 <br /> = c <br /> a � <br /> f- o <br /> -50 <br /> Notes: Non-detect analytical results shown at their detection limit with an open symbol. <br /> Top of casing elevation = 11.39 feet - msl. <br /> -60 <br /> 0 <br /> IN CP <br /> IZZ <br /> cb <br /> ,�N Cb °� <br /> --♦—TPHg --f— Benzene —0 Groundwater Elevation •Top of Well Screen <br /> M 9R1-154 AECOM Environment <br />