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v.8.7.009. EPA m.a.0.01 <br /> SEN'S SLOPE ESTIMATOR <br /> AMW-14 <br /> 300- <br /> 25 n = 55. <br /> Slo e = -0.035 <br /> units per year. <br /> 20 Mann Kendall <br /> normal approx. _ <br /> -2.904. <br /> 15 <br /> Decreasin trend <br /> significant'at 99% <br /> confidence level <br /> 10 two tailed). <br /> �ritical value = -2.575. <br /> 50- <br /> 0, vT <br /> Jul 1995 Apr 2002 Feb 2009 <br /> Hollow symbols indicate censored values. <br /> Constituent: Dichlorodifluoromethane (ug/L) Facility: Austin Road LF Data File: AUSTINOR <br /> Date: 3/10/09, 2:09 PM Client: Austin Road LF View: Batch <br /> ERST & A IATES, INC- <br />