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v.8.7.009. EPA m.a.0.01 <br /> SEN'S SLOPE ESTIMATOR <br /> AMW- <br /> 40- <br /> n = 53.n = 53. <br /> 3 Slope = -1.37 <br /> units per year. <br /> Mann Kendall <br /> normal approx. _ <br /> -3.779. <br /> 20- <br /> Decreasing20- <br /> DecreAsing trend <br /> ♦ ® ® ® significant at 99% <br /> ® confidence level <br /> ® (two tailed). <br /> ® critical value = -2.575. <br /> 1 <br /> 0 <br /> Mar 1994 Jan 2001 Nov 2007 <br /> Hollow symbols indicate censored values. <br /> Constituent: Trichloroethylene (ug/L) Facility: Austin Road LF Data File: AUSTINOR <br /> Date: 12/20/07, 9:58 AM Client: Austin Road LF View: —Batch— <br /> HERS <br /> atch <br /> HERST SOCIATES, INC" <br />