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0 9 0 <br /> Sanitast"v.9.3.24 For the statistical analyses of ground water by Geologic Associates only.EPA <br /> Hollow symbols indicate censored values. <br /> Sen's Slope Estimator <br /> A -4 <br /> 50 <br /> 40 n=59 <br /> Slope=-0.03412 <br /> units per year. <br /> Mann-Kendall <br /> normal approx._ <br /> 30 -4.891 <br /> critical=-2.33 <br /> J <br /> Decreasing trend <br /> significant at 98% <br /> confidence level <br /> 20 • (a=0.01 per <br /> • tail). <br /> •• • <br /> •• • <br /> • <br /> 10 <br /> • • <br /> 0 <br /> 3/12/96 8/7/99 1/1/03 5/28/06 10/22/09 3/18/13 <br /> Constituent: Vinyl chloride Analysis Run 4/19/2013 1:18 PM <br /> Facility: Forward Landfill Client: RSI Data File: AustVOCs <br />