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GeoHydrologic Consultants, Inc <br /> • Well EW-5D was pumped at a constant pumping rate of approximately 2 3 gallons per <br />' minute for the entire length of the test(745 minutes) Drawdown and recovery levels for <br /> EW-5D are included in Table 10A and water levels for observation wells are included in <br /> Table 11A Field data sheets for the aquifers test are included in Appendix D <br />' Well EW-5S was pumped at a constant pumping rate of approximately 0 25 gallons per <br /> minute for the entire length of the test (730 minutes) Drawdown and recovery levels for <br />' EW-5S are included in Table 10B and water levels for observation wells are included in <br /> Table 11B Field data sheets for the aquifers test are included in Appendix D <br /> The recovery data for EW-51D and EW-5S were plotted and analyzed using solutions <br /> developed by Cooper-Jacob (1946), straight-line method The assumptions for the <br /> Cooper-Jacob solutions were as follows <br /> • the aquifer has infinite area] extent <br />' • the aquifer is homogeneous, isotropic, and of uniform thickness <br /> • the aquifer potentiometric surface is initially horizontal <br /> • the pumping well is fully penetrating <br />' • the aquifer is unconfined <br /> i <br /> • the flow is steady <br /> • the water is released instantaneously from storage with decline in hydraulic head, <br /> a there is no delayed aquifer response <br /> • the flow is horizontal and uniform in a vertical section through the axis of the <br />' well <br /> • displacement is small relative to saturated thickness of the aquifer <br />' • the flow velocity is proportional to tangent of the hydraulicg radient <br />' • the diameter of the pumping well is small so that storage in the well can be <br /> neglected <br />' Note Storage effects are expected to be observed at the beginning of the pumping tests, <br /> for this reason, the analytical solutions were fitted to the latter portion of the graph, which <br /> represents the later time data when storage effects are not expected to be as influential <br />' The late time data were also used for the recovery data <br /> • <br /> TOC 171 Pilot Study Page 16 <br />