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v.8.7.009. EPA m.a.0.01 <br /> SEN'S SLOPE ESTIMATOR <br /> - 1 - <br /> 300 <br /> X250 n= 57. <br /> Slope = -11.14 <br /> units per year. <br /> ;200 <br /> Mann Kendall <br /> normal approx. _ <br /> -3.821. <br /> 150 Decreasing trend <br /> significant'at 99% <br /> confidence level <br /> 100 (two tailed). <br /> Critical value= -2.575. <br /> 50 <br /> AA <br /> Mar 1991 Dec 1999 Aug 2008 <br /> nstituent: Specific Conductance [Field] (umhos/cm) Facility: Austin Road LF Data File: AUSTININ <br /> Date: 1/13/09, 9:39 AM Client: Austin Road LF View: Batch <br /> 4P ERST & IATES, INC" <br />