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v.8.7.009. EPA m.a.0.01 <br /> SEWS SLOPE ESTIMATOR <br /> -2 <br /> 5 <br /> n = 31. <br /> 4 <br /> Slope = -1.205 <br /> units per year. <br /> Mann Kendall <br /> 3 — - -- statistic = -162. <br /> Decreasing trend <br /> significant at 99% <br /> confidence level <br /> 2 two tailed). <br /> Critical value = -152. <br /> 10- <br /> 01 <br /> Feb 1997 Aug 2002 Feb 2008 <br /> Constituent: Sulfate as SO4 (mg/L) Facility: Austin Road LF Data File: AUSTININ <br /> Date: 4/10/08, 9:20 AM Client: Austirj2,oad LF View: Batch <br /> HERST SOCIATES, INC:" <br />