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v.8.7.009. EPA m.a.0.01 <br /> SEN'S SLOPE ESTIMATOR <br /> 60- <br /> 5n= 43. <br /> Slo e = -0.027 <br /> units per year. <br /> 4 Mann Kendall <br /> a normal approx. _ <br /> to -5.975. <br /> 30- <br /> Decreasin trend <br /> significanUat 99% <br /> confidence level <br /> 2two tailed). <br /> Critical value = -2.575. <br /> 10- <br /> 0 <br /> Aug 1997 May 2003 Feb 2009 <br /> Hollow symbols indicate censored values. <br /> Constituent: Benzene (ug/L) Facility: Austin Road LF Data File: AUSTINOR <br /> Date: 3/11/09, 8:36 AM Client: Austin Road LF View: Batch <br /> ERST & A IATES, INC! <br />