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542 feet was perforated. I.1r. Dudrey concludFd that this drop may have been <br />caused by the release of a gas bubble formed during perforation operations, <br />or that the zone may be a "thief" zone. Due to the fact that no other pressure <br />drops were noted, it is our opinion that the zone between 530 and 542 feet is <br />a "thief" zone or a zone of lovrer pressure head. To be a "thief" zone, the <br />zone does not necessarily have to be dry. <br />On October 17, 1977, an 8 hour pump test was started. For the purposes <br />of the test, NNG-21 was allowed to flow and pressure drops were measured in <br />NNG-21C. Pump test data is presented in Table 4. It can be seen that an <br />equilibrium flow condition was obtained after approximately 4 hours of dis- <br />charge. The discharge test was continued for approximately 3 additional <br />hours to insure that an additional pressure drop was not noted in the obser- <br />vation well. The data obtained were analyzed to determine average aquifer <br />constants for the perforated zones. <br />Analyses were done using both the "Theis Nonequilibrium Method" and <br />the "Jacob Straight dine Method" to determine aquifer constants. Averaging <br />the values obtained from the above methods, an average aquifer transmissivity <br />of 1470 gallons per day per foot and an average storage coefficient of 0,006 <br />or 0.6 percent were calculated. <br />DISCUSSION <br />NNG-10 <br />Pump test data from NNG-10 is inconclusive relative to aquifer constants, <br />however, considering the geology of the area, the pressures noted at NNG-21C <br />and the low water requirement (i.e., 100 gallons per hour) it appears that the <br />• well will meet the demand requirement when the pump is lo~•rered to a greater <br />depth. <br />-3- <br />