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Figure 7 - TREND ANALYSIS - MW-11 <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) <br /> 100,000 0 <br /> Remediation system start-up with SVE using carbon for <br /> vapor abatement, February 17, 2005. <br /> -5 <br /> 10,000 ® ^ <br /> d <br /> ♦ ■ 0 -10 v <br /> z ■ ® ■ m <br /> 0 1,000 ■ ■ ■ ® -15 m <br /> E <br /> ® ♦ 20 m <br /> 0 100 ■ -�■ c <br /> 0 O <br /> ■ O - 0- O O 25 <br /> N System shut down for upgrades, W <br /> m 10 December 6, 2007. -30 `w <br /> = Upgraded system re- 3 <br /> r started, July 30, 2008. a <br /> 35 <br /> 1 0" <br /> _ ❑ ❑ ❑ ❑ -40 <br /> 7-7 <br /> Notes: Non-detect analytical results shown at their detection limit with an open symbol. <br /> 0 Too of casino elevation = 11.29 feet - msl. -45 <br /> O(b <br /> -� TPHg ■ Benzene 0Groundwater Elevation — -Top of Well Screen <br /> 01231-154 AECOM Environment <br />