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• EXHIBIT 19 - Continued <br />The second test, performed by the U.S. Geologic Survey on October <br />L5, 1975, was a drawdown-recovery test of the overburden above the Wadge <br />seam. According to the log of well FM-5, the portion of the overburden <br />penetrated by the well produces water from a zone of sandstone and silt- <br />stone from 175 - 237 feet. Discharge during the drawdown phase of the <br />test was erratic, and drawdown data could not be used to analyze aquifer <br />characteristics. Discharge averaged 6.3 gallons per minute for 35 min- <br />utes. Recovery after pumping is plotted on Figure 2, Well OS-FM-S of <br />this exhibit. Transmissivity was computed by the straight-line method to <br />be 115.1 gpd/f t., and permeability equalled 1.9 gpd/ft2. Due to the <br />short time the test was run, the erratic discharge rate and the partial <br />• penetration of the well into the overburden aquifer, limited confidence <br />is placed on the above results. <br />The third test, performed by Amuedo and Ivey, consultant geologists, <br />on May 25, 1977, was a drawdown test of the entire saturated thickness of <br />the overburden aquifer (71 feet) in the active surface mining area. <br />Drawdown was measured in an observation well 227 feet from the pumped <br />well, OS-77-58. Drawdown data from the observation well is plotted on <br />Figure 3, Well 08-77-34, of this exhibit. Because of the lag time in <br />obtaining drawdown at the distant observation well, the effective length <br />of the test prevented analysis by curve-matching methods. Transmissivity <br />was computed by the straight-line method to be 265.0 gpd/ft., and perme- <br />ability equalled 3.7 gpd/ft2. These values are considered typical of the <br />• overburden aquifer in the active surface mining area. <br />