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1 <br />5.0 WELL YIELD <br />' During development, the well was air-lifted using the drill rods as an air line. Water levels were <br />measured using an electric water-level probe that was lowered down a 3/4-inch PVC drop pipe <br />which extended from ground surface to below the bottom of the drill rods. The bottom of the <br />' drop pipe was sufficiently deep to not be affected by air bubbles from the air line. <br />' The initial static depth-to-water was 132 feet BGS. The well was air-lifted at 60 gallons per <br />minute (gpm) for six hours. At the end of pumping, the depth-to-water had stabilized a[ 186 feet <br />' BGS. Thus, the well was able to maintain a flow of 60 gpm with a drawdown of about 54 feet. <br />' For a static water level of 132 feet BGS, the pumping drawdown can reach 192 feet before the <br />water level reaches the top of the upper-most screen. Since this is much greater than the <br />' drawdown observed during air-lifting {54 feet), it is concluded that the well can maintain a <br />pumping flow rate of 60 gpm for long periods of time without the water surface falling below the <br />~' top of the screen. This is advantageous because it will minimize air entrapment in the pumping <br />water which will increase the pump life. <br />1 <br /> <br /> <br /> <br /> <br /> <br /> <br />' /ndustrial Water Wel! Completion Report Shepherd M~7/er, /nc. <br />P: X23-I03iTEX!-3.DOC g June /0, /997 <br />