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WHIRLWIND MINE, PERMIT NO. M-2007-044 , <br /> SECOND QUARTER 2026 HYDROLOGICAL REPORT <br /> Attachment 6. Monitoring Well W-1 <br /> Dissolved Specific Oxygen- <br /> Monitoring Sampled Water Level Field Temperature Oxygen (mg/L Conductance Reduction Comments <br /> Date (Y/N) (ft BTOC) (s.u.).) (deg. C) or%) (US/CM) Potential (mV) <br /> Q1 2019 No NM NM NM NM NM NM Inaccessible due to county road conditions. <br /> 6/25/2019 Yes 7459 7.53 11.04 7.0 1265 1766 <br /> 9/13/2019 No 74.70 7.03 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 11.12 3.7 1310 -250 <br /> 9/11/2020 No 75.02 7.72 10.49 7.1 1380 54 <br /> 11/6/2020 No 74.83 6.93 11.55 22 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 7.71 11.65 3.0 1519 -39.8 <br /> 7/13/2021 Yes 74.50 6.96 15.01 24 1542 480 <br /> 9/9/2021 No 74.80 7.87 12.41 2.0 1537 47 9 <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 10.66 7.78 1360.0 127.5 <br /> 6/29/2022 No 75.20 7.82 13.18 1.72 1557.0 292.0 <br /> 8/1/2022 Yes 75.52 783 13.26 2.46 1308.0 456.0 <br /> 11/16/2022 Yes 74.90 6.84 10.01 192 1385.0 240.0 <br /> Q1 2023 No NM NM NM NM NM NM Inaccessible due to county road conditions. <br /> 5/10/2023 Yes 75.45 7.91 11.41 0.27 968.0 16.2 <br /> 7/25/2023 Yes 75.65 8.01 13.14 2.34 1361.3 319.0 <br /> 10/31/2023 Yes 75.61 7.57 9.98 45.3 12540 27.9 <br /> Q1 2024 No NM NM NM NM NM NM Inaccessible due to county road conditions. <br /> 5/1/2024 Yes 75A1 7.38 9.69 20.48 1330.0 -148.9 <br /> 9/11/2024 Yes 75.29 7.72 11.33 2.17 1354.0 -331 <br /> 10/30/2024 Yes 75.35 775 1 9.48 2.38 1 1396.0 52.4 <br /> Q1 2025 No NM NM NM NM NM NM Inaccessible due to county road conditions <br /> 5/28/2025 Yes 75.34 7.58 13.50 10.66 15200 41 7 <br /> NM = Not Measured <br />