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<br />From the results of our field investigation we estimate <br />the well yield to be in the range of 25 to 40 gpm. A well in such <br />a low permeability aquifer and a yield of 25 - 40 gpm would <br />develop a zone of influence of about 80 feet during continuous <br />pumping. The cone of depression would be very steep, and <br />therefore the impact of this well on the alluvial aquifer would <br />be minimal. After the cessation of pumping in this well, the <br />recovery of the water level would be relatively quick during the <br />irrigation season and slower during the remaining seasons. <br />Another potential impact on the ground water quality can <br />derive from the small sewer plant located within the coal loadout <br />facility, near the train loadout building. This plant discharges <br />about 100 gallons per day through a septic tank into the ground. <br />CJ <br />Because of the limited size of this plant and the high <br />recharge to the aquifer from the irrigation system in the area, <br />the impact of this plant on the ground water quality will be <br />insignificant. <br />In summary, we believe that the coal loadout facility may <br />influence the ground water regime only in its potential for <br />reducing the precipitation and snowmelt infiltration as well as <br />in its potential for contamination caused by seepage through the <br />fills (the probability of which is minimal). <br />• <br />18 <br />GEO-HYDRO CONSULTING, INC. <br />