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WHIRLWIND MINE, PERMIT NO. M- 2007 -044 <br />SECOND QUARTER 2013 HYDROLOGICAL REPORT <br />Affachment 2. Whirlwind Decline <br />Monitoring <br />Date <br />Sample <br />Location <br />Inflow Rate(i) <br />m <br />Field pH <br />(S.U.) <br />Temperature <br />(deg. C <br />Dissolved <br />Oxygen <br />(mg/L <br />Specific <br />Conductance <br />(US/cm) <br />Oxygen - <br />Reduction <br />Potential mV <br />Comments <br />3/10/2008 <br />WW Sump <br />2.4 <br />8.30 <br />11.0 <br />NM <br />NM <br />NM <br />See Table 1 <br />6/19/2008 <br />WW Sump <br />2.8 <br />10.26 <br />11.5 <br />0.78 <br />592 <br />114 <br />See Table 1 <br />9/8/2008 <br />WW Sump <br />2.2 <br />9.11 <br />11.0 <br />8.48 <br />649 <br />62 <br />See Table 1 <br />12/16/2008 <br />WW Sump <br />1.7 <br />8.75 <br />10.7 <br />5.22 <br />609 <br />149 <br />See Table 1 <br />3/5/2009 <br />WW Sump <br />2.1 <br />8.52 <br />11.1 <br />8.24 <br />618 <br />151 <br />No analytical samples collected <br />4/20/2009 <br />WW Sump <br />2.2 <br />8.41 <br />11.2 <br />6.68 <br />626 <br />177 <br />No analytical samples collected <br />8/11/2009 <br />WW Sump <br />1.6 <br />8.76 <br />11.9 <br />6.44 <br />599 <br />152 <br />No analytical samples collected <br />12/1/2009 <br />WW Sump <br />1.4 <br />8.61 <br />11.5 <br />6.54 <br />624 <br />160 <br />No analytical samples collected <br />2/2/2010 <br />WW Decline <br />2.0 <br />7.06 <br />11.3 <br />7.02 <br />597 <br />170 <br />No analytical samples collected <br />4/21/2010 <br />1 WW Decline <br />1.9 <br />8.07 <br />12.3 <br />6.76 <br />576 <br />201 <br />See Table 1 <br />9/8/2010 <br />WW Decline <br />1.7 <br />8.65 <br />11.9 <br />4.53 <br />592 <br />133 <br />No analytical samples collected <br />11/4/2010 <br />WW Decline <br />3.4 <br />8.49 <br />11.6 <br />2.22 <br />578 <br />207 <br />No analytical samples collected <br />2/7/2011 <br />WW Decline <br />1.7 <br />8.49 <br />11.3 <br />2.26 <br />590 <br />151 <br />See Table 1 <br />6/20/2011 <br />WW Decline <br />1.2 <br />8.17 <br />11.7 <br />2.42 <br />620 <br />159 <br />No analytical samples collected <br />8/20/2011 <br />WW Decline <br />1.3 <br />8.54 <br />11.6 <br />2.54 <br />644 <br />163 <br />No analytical samples collected <br />10/25/2011 <br />I WW Decline <br />1.0 <br />8.48 <br />11.5 <br />2.63 <br />618 <br />157 <br />No analytical samples collected <br />11/9/2011 <br />WW Decline <br />1.0 <br />8.19 <br />11.5 <br />3.09 <br />631 <br />234 <br />See Table 1 <br />3/28/2012 <br />WW Decline <br />1 0.7 <br />1 8.32 <br />1 11.5 <br />1 2.41 <br />1 592 <br />1 173 <br />(1) From First Quarter 2008 to Fourth Quarter 2009, the inflow rate was estimated over the quarter by calculating the volume of water pumped out of the mine and treated <br />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. As of the First <br />Quarter 2010, water inflow is estimated based on the approximate water elevation and the void volume of the mine workings. <br />