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GM M_ <br /> 9 <br /> i <br /> 1 <br /> I <br /> Appendix C <br /> AQUIFER CALCULATIONS <br /> This appendix includes a description of the calculations performed to <br /> determine transmissivity and graphs of the data. <br /> Transmissivity is defined as the ease with which water moves through a <br /> unit width of an aquifer. It varies by several orders in magnitude <br /> depending on the aquifer. A typical transmissivity for a producing <br /> aquifer is 100,000 to 1,000,000 gallons per foot per day (gpf/day). In <br /> this investigation three transmissivities were calculated; two were <br /> calculated using drawdown data from the recovery well (Plate C-1) and <br /> the nearest well, E-3 (Plate C-2), and one from Well E-3 (Plate C-3), <br /> during the reactivation of the system. For the recovery calculations it <br /> was assumed drawdown from pumping had reached a steady state at a con- <br /> stant discharge rate of 15.5 gpm. The transmissivity values range from <br /> 5,000 to 8,000 gpf/day. This type calculation is based on assumptions <br /> such as the aquifer is homogeneous, isotropic and infinite in areal <br /> extent. Because of these assumptions these values should' only be <br /> considered best estimates. <br /> • al <br />