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<br />WHIRLWIND MINE, PERMIT NO. M-2007-044 <br />FOURTH QUARTER 2010 HYDROLOGICAL REPORT <br />2. Whirlwind Decline <br /> <br /> <br />Sample Date <br />Sample <br />Location <br />Inflow Rate <br />(gpm) (1)(2) <br />Field pH <br />(s.u.) <br />Temperature <br />(deg. C) Dissolved <br />Oxygen <br />(mg/L) Specific <br />Conductance <br />(US/cm) Oxygen- <br />Reduction <br />Potential (mV) <br /> <br />Comments <br />3/10/2008 WW Sum 2.4 8.30 11.0 NM NM NM See attached tables <br />6/19/2008 WW Sum 2.8 10.26 11.5 0.78 592 114 See attached tables <br />9/8/2008 WW Sum 2.2 9.11 11.0 8.48 649 62 See attached tables <br />12/16/2008 VWV Sum 1.7 8.75 10.7 5.22 609 149 See attached tables <br />3/5/2009 WW Sum 2.1 8.52 11.1 8.24 618 151 No analytical samples collected <br />4/20/2009 WW Sum 2.2 8.41 11.2 6.68 626 177 No analytical samples collected <br />8/11/2009 VWV Sum 1.6 8.76 11.9 6.44 599 152 No analytical samples collected <br />12/1/2009 WW Sum 1.4 8.61 11.5 6.54 624 160 No analytical samples collected <br />2/2/2010 WW Decline 2.0 7.06 11.3 7.02 597 170 No analytical samples collected <br />4/21/2010 VWV Decline 1.9 8.07 12.3 6.76 576 201 See attached tables <br />9/8/2010 VVW Decline 1.7 8.65 11.9 4.53 592 133 No analytical samples collected <br />11/4/2010 <br />/11 Cr- Cir, WW Decline <br />F (l. ,.?.. nr%no a 3.4 <br />. r......ai., 8.49 <br />nnnn - :_c-- 11.6 <br />-- _-.- - 2.22 578 207 No analytical samples collected <br />,.....,.. -.1 ,- „,nv.. law VV- -LIIIiaLcu uvci uia tiual lGl uy l+aR.UlaUlly Lilt- vuiurliu U1 water pumpea oui or ine mine ana <br />treated and estimations of the volume of water evaporated off the untreated water tank and brought out of the mine as moisture in waste rock, ore, and ventilated air. <br />(2) As of the First Quarter 2010, water inflow is calculated based on the approximate water elevation and the void volume of the mine workings. <br />3. Packrat Mine <br />Not Accessible