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ekienvironment <br /> & water <br /> 35 degrees relative to the Fall 2022 gradient. The calculated gradient in the vicinity of nearby <br /> Pond S5 was 0.0006 and the azimuth was 295 degrees. The Spring 2023 gradient decreased by <br /> 0.0001 and azimuth changed by 5 degrees relative to the Fall 2022 gradient. Near former LAS-2, <br /> the calculated gradient was 0.0016 and the azimuth was 230 degrees, indicating the Spring 2023 <br /> gradient magnitude increased by 0.0008 and the azimuth changed by-20 degrees relative to the <br /> Fall 2022 gradient. <br /> Near Pond S6, water levels in monitoring wells increased by about 5.25 feet on average between <br /> the Fall 2022 and Spring 2023 (Table 3). <br /> 3.2 Groundwater Analytical Results <br /> Results for TDS, nitrate as nitrogen (NO3-N), and total coliform analyzed in samples from the <br /> required compliance wells during the Spring 2023 monitoring event are shown in Table 5; results <br /> for all wells sampled and additional constituents analyzed are reported in Appendix C. The <br /> following discussion summarizes the analytical results and identifies issues of potential concern <br /> in the groundwater quality monitoring data from the compliance wells. <br /> City of Lathrop 11 13 July 2023 <br /> EKI B90088.03 <br />