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Monitoring Well <br />Hydraulic Conductivity <br />(cm /sec) <br />Hydraulic Conductivity <br />(ft/day) <br />MW -1 <br />9.2 x 10 <br />2.6 x 10 -3 <br />MW -2 * <br />4.9 x 10 -10 <br />1.4 x 10 -6 <br />MW-3 <br />7.1 x 10 -9 <br />2.0 x 10 -5 <br />MW-4 <br />5.0 x 10 -7 <br />1.4 x 10 -3 <br />i <br />1 <br />1 <br />1 <br />r <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />hydraulic conductivities in the range of 1 -'to 10 -10 centimeters per second (cm /sec). Similarly, results of <br />hydraulic conductivity testing of well MW -4 conducted by both rising and falling head slug tests in 2010 <br />(Golder 2011) were in the same range as MW -1, as shown below. <br />Notes: <br />October 2012 <br />* MW -2 was estimated because water levels recovered to higher levels than "static" at the beginning of the <br />test (Secor 1998). <br />Wells MW -1 through MW -3 were inferred to be installed within or at the interface of the Codell sandstone <br />and Niobrara A (Laporte Member) limestone band (Secor 1998). The A band contained thin shale layers <br />in the screened interval of wells MW -2 and MW -3, based on the borehole logs. The lithology at well <br />MW -4 is not known due to the lack of a borehole log. Five core samples of the Codell sandstone at the <br />Boettcher Quarry were tested for grain density, porosity, and permeability to gas (Reservoirs Inc. 1987). <br />Grain densities ranged from 2.69 to 2.73 grams per cubic centimeter (g /cc), porosities from 5.0 to <br />13.0 percent by volume (% BV), and permeability to gas from 0.01 to 0.05 millidarcy (md). <br />\10\ 81640\ 0400\ charactenzationpin_ fnl- 23octl2 \charactenzationpin_fnl- 23octl2 docx <br />Attorney Work Product, <br />Confidential and Privileged <br />4 <br />103- 81640A <br />Golder <br />Associates <br />