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WHIRLWIND MINE, PERMIT NO.M-2007-044 <br /> SECOND QUARTER 2023 HYDROLOGICAL REPORT <br /> Attachment 8.Rajah 49 Mine Thornton Portal <br /> Dissolved peci isOxygen- <br /> Sampled Inegligible <br /> ate Field pH Temperature Oxygen Conductance Reduction <br /> Sample Date (Y/N) ) (s.u.) (deg.C) (mg/L) (US/cm) Potential(mV) Comments <br /> 9/21/2009 Yes m 858 106 7.71 938 130 Sunny, dry, see Table 5 <br /> 6/30/2010 Yes m 8.9 7.8 10.12 889 153 Hot, clear skies, dry, see Table 5 <br /> 5/24/2011 Yes negligible 9.16 11.1 803 906 120 Ptl cloudy,warm, see Table 5 <br /> 5/30/2012 Yes m 9.67 64 919 939 NM OPR Probe Broken <br /> 6/17/2013 Yes m 8.48 795 14 7% 928 -57 2 water was clear <br /> 6/17/2014 Yes m 8.64 10.85 6.3 973 146.2 <br /> 8/5/2015 Yes 835 1298 361 1030 251 <br /> 6/2/2016 Yes 817 1004 160 888.8 214 <br /> 6/7/2017 Yes 815 12.21 4.52 910.7 329 <br /> 6/20/2018 Yes 8.59 9.55 1204 642 -4 5 <br /> 6/25/2019 Yes 880 10.5 4.46 859 196 <br /> 6/24/2020 Yes ble 875 10.1 1268 827 86.2 <br /> 7/13/2021 Yes I negligible 8.01 1 1343 1 1242 1 9075 1 428 <br /> 8/1/2022 1 Yes negligible 1 8.40 13.7 10.04 9034 419 <br />