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v.8.7.009. EPA m.a.0.01 <br /> SEWS SLOPE ESTIMATOR <br /> AMW-10 <br /> 1 <br /> n = 55. <br /> Slope = -0.199 <br /> units per year. <br /> a 1 Mann Kendall <br /> ® normal approx. _ <br /> z ® -3.064. <br /> ® <br /> co ® ® Decreasin trend <br /> significan at 99% <br /> ® ® ® ®®® ® ® ® ♦® ♦® confidence level <br /> z ♦ ♦ (two tailed). <br /> Critical value = -2.575. <br /> 01 1 <br /> Mar 1994 Feb 2001 Feb 2008 <br /> Constituent: Nitrate as N (mg/L) Facility: Austin Road LF Data File: AUSTININ <br /> Date: 4/10/08, 1:14 PM Client: Aus4foad LF View: Batch <br /> HERST & ASSOCIATES, INC.' <br />