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0 <br />0.1 <br />0.2 <br />0.3 <br />0.4 <br />0.5 <br />1/20/15 1/18/17 1/17/19 1/16/21 1/15/23 1/14/25 <br />Sen's Slope Estimator <br />MW-2R <br />Constituent: Di-isopropyl ether Analysis Run 7/1/2025 12:44 PM <br />Foothill LF Client: Aptim Data: 061625 Foothill Landfill Database <br />Sanitas™ v.10.0.27 Software licensed to APTIM. EPA <br />ug/Ln = 19 <br />Slope = 0 <br />units per year. <br />Mann-Kendall <br />statistic = -72 <br />critical = -68 <br />Decreasing trend <br />significant at 98% <br />confidence level <br />(α = 0.01 per <br />tail). <br />Hollow symbols indicate censored values.