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v.8.7.009. EPA m.a.0.01 <br /> SE'N.'S SLOPE ESTIMATOR <br /> 10- <br /> 8- n = 30. <br /> Slope = -0.098 <br /> units per year. <br /> Mann Kendall <br /> E - statistic = -188. <br /> z <br /> Decreasing trend <br /> confidence le vel/� <br /> z (pyo tailed). <br /> Critical value = -146. <br /> 2 <br /> 0 <br /> Feb 1997 Jun 2002 Nov 2007 <br /> Hollow symbols indicate censored values. <br /> Constituent: Nitrate as N (mg/L) Facility: Austin Road LF Data File: AUSTININ <br /> Date: 12/17/07, 9:31 AM Client: Austin Road LF View: Batch <br /> HERST SOCIATES, INC." <br />