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<br />' (1) The installation cf monitoring wells M-12 and M-13 have confirmed that the <br />' ground water gradient follows the general topography and is from the east- <br />, northeast to west-southwest. <br />' (2) The average ground water gradient below the tailings facility is 0:05 ft/ft and the <br />average hydraulic conductivity of these materials is 0.2 fUday. <br />1 <br />' (3) The average ground water seepage velocity is estimated to be 0.04 fUday (14.6 <br />fUyr). At this seepage velocity, it would take a particle of water approximately _% <br />' 110 years to move from the tailings facility to Battle Mountain's downgradient <br />boundary. <br />' (4) The underflow in the uppermost water-bearing strata of the Santa Fe Formation <br />' through the flow window that could potentially be impacted by the tailings facility <br />is 2.1 gpm. <br /> <br /> (5} The beds of the Santa Fe Formation are not easily correlatable between boreholes; <br />' however, it is inferred through outcrops of the Santa Fe Formation that these beds <br /> may be dipping at approximately 20 degrees to the northwest. <br />1 <br /> (6) Sustained pumping rates at these monitoring wells are extremely low, in the range <br />' of 0.5 to 2.5 gpm. <br />(7) Water quality sampling during the pumping tests at each of the manitoring wells <br />indicates no detectable concentrations of WAD or total cyanide at any of the <br />' wells. <br />($) The three existing monitoring wells can provide adequate monitoring down- <br />gradient of the tailings facility and collection pond. if rernediation does become <br />' necessary in the future due to cyanide concentrations in the three existing <br />' -9- <br />1 <br />