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WHIRLWIND MINE,PERMIT NO.M-2007-044 <br /> SECOND QUARTER 2023 HYDROLOGICAL REPORT <br /> Attachment 6.Monitoring Well W--1 <br /> Dissolved peci isOxygen- <br /> Monitoring Sampled Water Level Field pH Temperature Oxygen(mg/L Conductance Reduction <br /> Date (Y/N) (ft BTOC) (s.u.) (deg.C) or%) (US/cm) Potential(mV) Comments <br /> 10/21/2008 Yes 7322 7.96 10.5 095 1543 124 Sunny, Dry, see Table 3 <br /> 12/16/2008 Yes 7444 773 9.9 1.47 1329 187 Overcast,4"snow, see Table 3 <br /> 2/10/2009 Yes 74.73 7.82 101 0.93 1251 5 bunny, o - snowpac , see a e <br /> 4/20/2009 Yes 75.00 7.34 10.9 013 1209 80 Sunny, Dry, see Table 3 <br /> 6/24/2009 Yes 74.96 7.63 10.9 -- 1157 -- Raining, cool, see Table 3 <br /> 9/11/2009 Yes 7484 7.91 11.3 023 1219 -75 Sunny, dry, see Table 3 <br /> 12/10/2009 Yes 7469 7.66 9.8 1.65 1182 80 Cold, overcast, see Table 3 <br /> 2/4/2010 Yes 7440 701 10.7 0.61 1240 -74 Cold, clear skies, 3 ft of snow, see Table 3 <br /> 6/7/2010 Yes 73.98 773 12.2 0.25 1239 -111 Hot, clear skies, dry, see Table 3 <br /> 7/28/2010 No 73.48 NM NM NM NM NM Water level measurement only <br /> 11/4/2010 No 74.00 NM NM NM NM NM Water level measurement only <br /> 4/18/2011 No 73.94 NM NM NM NM NM Make-up for missed 1Q11 monitoring <br /> 5/24/2011 Yes 73.77 7.85 11.0 0.11 1210 10 Ptly cloudy,warm, see Table 3 <br /> 8/16/2011 No 7372 NM NM NM NM NM Water level measurement only <br /> 10/25/2011 No 7394 NM NM NM NM NM Water level measurement only, Overcast, light ram <br /> 3/28/2012 No 7398 NM NM NM NM NM Water level measurement only,weather dry and calm <br /> 5/30/2012 Yes 73.98 772 10.9 1.61 1252 NM ORP Probe Broken <br /> 8/7/2012 No 74.00 NM NM NM NM NM <br /> 11/14/2012 No 74.05 NM NM NM NM NM <br /> 3/18/2013 No 7395 NM NM NM NM NM <br /> 6/17/2013 Yes 7402 7.31 11.2 37.6% 1216 544 First bail the water was clear, but was muddy for the remainder of <br /> the purge <br /> 8/14/2013 N/A N/A N/A N/A N/A N/A N/A Field notes were lost. <br /> 11/8/2013 No 73.89 6.38 106 0206 1186 50.5 <br /> Q1 2014 No NM NM NM NM NM NM Inaccessible due to county road conditions <br /> 6/18/2014 Yes 73.27 6.42 113 1.7 1349 75 <br /> 9/9/2014 No 7419 6.04 141 14 1386 317 <br /> 11/13/2014 No 7429 6.61 11.0 46 1219 272 <br /> 3/31/2015 No 7436 650 11.4 5.0 1340 282 <br /> 5/29/2015 No 7442 674 12.5 3.0 1438 328 <br /> 8/5/2015 Yes 7454 740 12.2 2.5 1484 330 <br /> 11/9/2015 No 74.39 7.40 11.9 3.5 1250 326 <br /> 3/31/2016 No 74.40 7.13 11.05 1.7 1539 425 <br /> 6/1/2016 Yes 74.40 7.26 12.04 3.4 1432 421 <br /> 8/3/2016 No 7460 6.51 1594 2.8 1463 301 <br /> 10/12/2016 No 7460 620 1458 55 1507 290 <br /> 3/24/2017 No 7466 615 1275 4.2 1332 504 <br /> 6/7/2017 Yes 74.65 722 1266 6.6 1502 375 <br /> 9/8/2017 No 74.50 6.95 15.25 5.0 1438 290 <br /> 10/20/2017 No 74.47 6.27 11.33 88 1376 803 <br /> 3/22/2018 No 7469 7.22 10.88 48 1048 290 <br /> 6/20/2018 Yes 7469 7.45 11.46 65 1014 -7.7 <br /> 9/7/2018 No 74.69 7.19 11 65 45 962 -349.9 <br /> • 12/14/2018 No 1 7469 1 599 11.01 NM 1366 293 <br /> Q1 2019 No NM NM NM NM NM NM Inaccessible due to county road conditions <br />