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0 0 0 <br /> v.8.7.009. EPA m.a.0.01 <br /> SEWS SLOPE ESTIMATOR <br /> 8 <br /> n= 70. <br /> Slo e = -0.192 <br /> ♦ <br /> un s per year. <br /> Mann Kendall <br /> ® normal approx. _ <br /> z -3.966. <br /> 40- <br /> Q) Decreasingg trend <br /> F significant at 99% <br /> confidence level <br /> (two tailed). <br /> Critical value= -2.575. <br /> 2 <br /> Aug 1991 May 2000 Feb 2009 <br /> Constituent: Nitrate as N (mg/L) Facility: Austin Road LF Data File: AUSTININFLAG <br /> Date: 3/10/09, 10:56 AM Client: Austin Road LF View: Batch <br /> ERST & ASSOCIATES, INC <br />