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0 <br />0.6 <br />1.2 <br />1.8 <br />2.4 <br />3 <br />1/19/15 1/17/17 1/17/19 1/15/21 1/15/23 1/14/25 <br />Sen's Slope Estimator <br />MW-1A <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 = 21 <br />Slope = 0.04516 <br />units per year. <br />Mann-Kendall <br />statistic = 80 <br />critical = 78 <br />Increasing trend <br />significant at 98% <br />confidence level <br />(α = 0.01 per <br />tail).