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preservation and analysis techniques and procedures used at the <br /> Nucla Mine are the same as those previously described in Section <br /> III.A. for the surface water operational monitoring program. A <br /> qualification which needs to be made here is that the specific <br /> procedure by which ground water samples have been taken from Nucla <br /> Mine monitoring wells varies slightly from well to well . The <br /> procedure used depends upon one or more of the following variables: <br /> casing diameter, rate of recovery, casing storage volume, depth to <br /> water and site accessibility. As a result, a summary of the <br /> sampling procedures for each well is detailed below. <br /> Well No. Sampling Procedures and Remarks <br /> GW-N3 Set pump at 65 feet; pump 40 to 70 <br /> gallons and sample. <br /> GW-N4 Set pump at 20 feet; pump 40 to 50 <br /> gallons and sample. <br /> GW-N9 Set pump at 65 feet; pump 30 to 90 <br /> gallons and sample. <br /> GW-N10 Dry well . <br /> B. Water Levels <br /> Static water level measurements have been taken on monitor <br /> wells GW-NI through GW-N11 on a monthly basis since the fall of <br /> 1979. Recently installed monitor wells are also being <br /> monitored on a monthly basis. All of the water level data are <br /> presented in tabular and graphical form in Appendix E. <br /> 1. Wells GW-N1 and GW-N1P1 -- Underburden <br /> Water level measurements have been taken at these two wells on <br /> a monthly basis since August, 1979. The water level hydrographs <br /> show that there is a 10-foot seasonal fluctuation in static water <br /> 73 <br />