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0 <br />0.24 <br />0.48 <br />0.72 <br />0.96 <br />1.2 <br />2/7/19 4/15/20 6/23/21 8/30/22 11/7/23 1/14/25 <br />Sen's Slope Estimator <br />MW-7 <br />Constituent: Nitrate as N Analysis Run 7/1/2025 12:50 PM <br />Foothill LF Client: Aptim Data: 061625 Foothill Landfill Database <br />Sanitas™ v.10.0.27 Software licensed to APTIM. EPA <br />mg/Ln = 13 <br />Slope = 0.1031 <br />units per year. <br />Mann-Kendall <br />statistic = 45 <br />critical = 39 <br />Increasing trend <br />significant at 98% <br />confidence level <br />(α = 0.01 per <br />tail).