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Well No. <br />Ground <br />Elevation (ft -MSL) <br />Depth to <br />Water (ft -TOC)* <br />TOC Above <br />Ground (ft) ** <br />Groundwater <br />Elevation (ft -MSL) <br />DW -1 <br />5045.2 <br />66.61 <br />1.5 <br />4980.1 <br />DMW -1 <br />5044.5 <br />63.65 <br />1.5 <br />4982.3 <br />DMW -2 <br />5042.6 <br />65.77 <br />1.5 <br />4978.3 <br />CMW -1 <br />5047.0 <br />32 psi <br />1.1 <br />5122.0 <br />CMW -2 <br />5047.8 <br />34 psi <br />1.3 <br />5127.6 <br />Aquifer <br />Transmissivity <br />(gpd/ft) <br />Transmissivity <br />(ft ^2 /day) <br />Hydraulic <br />Conductivity (ft /day) <br />Storativity <br />Dakota <br />Cheyenne <br />650 <br />225 <br />85 <br />30 <br />1.3 <br />0.3 <br />1.4E -04 <br />1.4E -04 <br />Memorandum to Paul Seby, Carolyn Burr <br />February 7, 2003 <br />Page 3 <br />Aquifer Testing <br />Pumping tests were performed in DW -1 and CMW -2. The second Cheyenne monitoring well <br />was selected, as it appeared to make twice as much water during well development as CMW -1 <br />did. Hydrographs of the water level data are presented in Attachment C. The static water level <br />data is presented in Table 2. <br />Table 2 <br />Summary of Static Water Level Data <br />Notes: * Water levels collected on Jan. 11, 2003 <br />** Top of Casing (TOC) <br />The Cheyenne monitoring wells were artesian and flowing at approximately 3.5 gpm at CMW -1 <br />and approximately 7 gpm at CMW -2. Therefore the static water was collected by shutting in the <br />wellheads and recording the pressure. The water level data and pumping test results indicate that <br />the Dakota and Cheyenne aquifers do not appear interconnected beneath the drill site. <br />Step pumping tests were conducted in DW -1 and CMW -2 to predict the maximum sustainable <br />yield for the 24 hour pumping test. Well DW -1 was pumped at 65, 95, 125 and 200 gpm. Well <br />CMW -2 was pumped at 40, 60 and 80 gpm. <br />A 24 -hour pumping test was conducted at DW -1 on December 21, 2002 at an average rate of 147 <br />gpm. A 24 -hour pumping test was conducted at CMW -2 on January 9, 2003 at an average <br />pumping rate of 60 gpm. During the tests, the water levels in the adjacent wells were monitored <br />with data loggers and pressure transducers. The average aquifer characteristics are presented in <br />Table 3. <br />190066:2} <br />Table 3 <br />Summary of Aquifer Characteristics <br />