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Quarterly Groundwater Monitoring Report - First Quarter 2016 <br /> L&M Operable Unit- West Weber Avenue and North Lincoln Street, Stockton, CA <br /> April 29, 2016 <br /> accordingly based on skimmer system operational data. Groundwater monitoring and sampling <br /> activities were performed in accordance with Monitoring and Reporting Program (MRP) No. <br /> R5-2012-0805 (Appendix A). <br /> MONITORING AND SAMPLING DATA AND RESULTS <br /> 2.2.1 Groundwater Monitoring Summary <br /> 1Q16 MONITORING DATA <br /> A Zone Wells <br /> 2AMW-12,2AMW-13, 2AMW-14, MW-9, MW-18 through <br /> MW-23, MW-25, MW-28, MW-31, MW-34, and MW-45 <br /> B Zone Wells <br /> L&M Operable Unit wells monitored MW-16, MW-17, MW-24, MW-26, MW-27, MW-35, MW-42, <br /> (48 total): MW-44, MW-46, MW-47, MW-51, MW-52, and MW-56 <br /> through MW-60 <br /> C Zone Wells <br /> MW-54, MW-61 through MW-67 <br /> D Zone Wells <br /> MW-55, and MW-68 through MW-74 <br /> A Zone Wells <br /> 2AMW-12, MW-9, MW-18, MW-20 through MW-22, and <br /> • <br /> MW-31 <br /> B Zone Wells <br /> L&M Operable Unit wells sampled MW-16, MW-17, MW-42, MW-46, MW-51, MW-56 through <br /> (33 total): MW-60 <br /> C Zone Wells <br /> MW-54, MW-61 through MW-67 <br /> D Zone Wells <br /> MW-55 and MW-68 through MW-74 <br /> Monitoring and sampling dates: January 11 through 13,2016 <br /> Were SPH observed this quarter? Yes <br /> DTW range (ft below TOC): 9.27 (MW-23) to 23.28 (MW-55) <br /> A Zone <br /> 0.53 increase (-0.64 [4Q15] to-0.11 11Q161) <br /> B Zone <br /> Average change in groundwater 0.28 decrease (-3.47 [4Q15] to-3.75 [1 Q16]) <br /> elevation since last event (ft): C Zone <br /> 0.46 decrease (-8.16 [4Q15] to-8.62 [1Q16]) <br /> D Zone <br /> 0.14 decrease -8.51 4Ql 51 to-8.65 1Q16 <br /> A Zone <br /> Southeast at 0.016 and East 0.016 <br /> Groundwater flow direction and B Zone <br /> gradient Northwest at 0.021 and Northeast at 0.020 <br /> (ft per ft): C Zone <br /> Northeast at 0.007 <br /> D Zone <br /> ® Stantec 5 <br />