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<br />WHIRLWIND MINE, PERMIT NO. M-2007-044 <br />FOURTH QUARTER 2010 HYDROLOGICAL REPORT <br />5. PR Spring <br /> <br /> <br />Sample Date <br />Sampled <br />(Y/N) <br />Inflow Rate <br />(gpm) <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 Yes 4 to 5 8.1 8.6 NM NM NM Sunny, Ave. of 1 foot snowpack, see <br />attached tables <br />6/19/2008 Yes 4.7 7.90 13.8 9.95 762 140 Sunny, Dry, see attached tables <br />9/8/2008 Yes 4.1 8.36 13.4 8.39 883 166 Sunny, Dry, see attached tables <br />12/15/2008 Yes 4.5 8.31 9.1 8.20 790 -35 Overcast, 4" snowpack, see attached <br />tables <br />2/10/2009 Yes 4.5 6.68 9.2 7.27 923 90 Sunny, Cold, 1-2" snowpack, see <br />attached tables <br />4/20/2009 Yes 4.5 8.24 12.3 8.45 898 195 Sunny, Dry, see attached tables <br />8/11/2009 No 4.7 8.48 13.9 8.25 889 133 Sunny, Hot, Dry <br />12/1/2009 No 1.5 9.15 8.6 11.54 881 116 Flow restricted by vegetation <br />6/2/2010 Yes 2.3 8.52 13.2 2.27 880 172 Flow restricted by vegetation <br />7/28/2010 No 5.2 8.44 13.4 8.04 880 99 Sunny, Dry, Vegetation removed <br />11/4/2010 No 5.1 8.47 10.1 8.51 856 157 Sunny, Dry <br />ww. ?. vV I ti. Ewa ul,l.rcJ0??J1c 111 1 cV1 Ua1y VI rv1a 11.11, GV IV UUC LV U=p JI IVW