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-- 7— <br /> r-77 - <br /> Well I.D. OB-4 <br /> Screened Interval: 40-50 Top of Casing Elevation: 14.34 14.25* <br /> Diesel Gasoline Benzene Toluene Ethyl Xylene Depth to Water Change in <br /> Benzene Water Elevation Elevation <br /> Units Date ppb ppb ppb ppb ppb ppb feet feet feet <br /> 4/26/2000 NA NA NA NA NA NA 25.94 11.60 NA <br /> 7/20/2000 NA NA NA NA NA NA 26.34 .12.09 -0.49 <br /> 3/13/2001 NA NA NA NA NA NA 27.43 13.18 -1.09 <br /> 6/8/2001 NA NA:. NA NA NA NA 27.97 13.72. -0.54 <br /> 9/18/2001 dry <br /> 12/7/2001 dry <br /> 6/17/2002 NA NA NA NA NA NA 29.02 14.77 -14.77 <br /> 9/9/2002 NA NA NA NA NA NA 29.90 15.65 -0.88 <br /> 12/1.9/2002 NA NA NA NA NA NA 29.79 15.54 0.11 <br /> 3/25/2003 NA NA NA. NA NA NA 29.69 15.44 0.10 <br /> 6/18/2003 NA NA NA NA NA NA 29.82 15.57 -0.13 <br /> 9/23/2003 dry <br /> 12/19/2003 dry <br /> NA=Not sampled, not applicable. <br /> * .09 ft of csg cut off during Pilot Test <br />