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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 /> 6/25/2019 Yes 7459 7.53 1104 70 1265 176.6 <br /> 9/13/2019 No 7470 703 11.20 2.6 1376 215 <br /> 11/8/2019 No 74.80 7.61 11.93 2.1 1475 261 <br /> 3/27/2020 No 74.70 7.25 10.06 2.7 1350 115 <br /> 6/24/2020 Yes 74.88 7.63 1112 3.7 1310 -250 <br /> 9/11/2020 No 75.02 7.72 1049 7.1 1380 54 <br /> 11/6/2020 No 74.83 6.93 1155 2.2 1610 143 <br /> Q1 2021 No NM NM NM NM NM NM Inaccessible due to county road conditions <br /> 6/18/2021 No 74.95 771 11.65 30 1519 -39.8 <br /> 7/13/2021 Yes 74.50 696 15.01 2.4 1542 480 <br /> 9/9/2021 No 74.80 7.87 12.41 2.0 1537 479 <br /> 11/9/2021 No 75.30 6.81 12.76 6.8 1572 164.9 <br /> 3/29/2022 Yes 75.30 7.00 1066 7.78 1360.0 127.5 <br /> 6/29/2022 No 75.20 7.82 1318 1.72 15570 2920 <br /> 8/1/2022 Yes 7552 7.83 1326 246 13080 4560 <br /> 11/16/2022 Yes 7490 6.84 1001 1 92 13850 2400 <br /> Q1 2023 No NM NM NM NM NM NM Inaccessible due to county road conditions. <br /> 5/10/2023 Yes 7545 7.91 1141 03 968 162 <br /> NM= Not Measured <br />