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• <br /> v.8.7.009. EPA m.a.0.01 <br /> SEN'S SLOPE ESTIMATOR <br /> - 1 <br /> 80 <br /> n = 42. <br /> 60 Sloe = -9.428 <br /> nz <br /> units per year. <br /> Mann Kendall <br /> normal approx. _ <br /> -3.698. <br /> 40 Decreasing trend <br /> significant at 99% <br /> E ♦ confidence level <br /> ® ®® ® (two tailed). <br /> critical value = -2.575. <br /> 20 <br /> 0 <br /> Mar 1991 Jun 1999 Aug 2007 <br /> :onstituent: Total Dissolved Solids [TDS] (mg/L) Facility: Austin Road LF Data File: AUSTININ <br /> Date: 9/27/07, 9:00 AM Client: Austin Road LF View: Batch <br /> HERST & ASSOCIATES, INC <br />