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WHIRLWIND MINE, PERMIT NO. M-2007-044 <br /> FIRST QUARTER 2025 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) <br /> 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 74.59 7.53 11 04 7.0 1265 176.6 <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 1006 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 1049 7.1 1380 54 <br /> 11/6/2020 No 74.83 6.93 11 55 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 7.71 1165 3.0 1519 -39.8 <br /> 7/13/2021 Yes 74.50 6.96 1501 24 1542 480 <br /> 9/9/2021 No 74.80 7.87 12.41 20 1537 47.9 <br /> 11/9/2021 No 7530 681 12.76 6.8 1572 164.9 <br /> 3/29/2022 Yes 75.30 7.00 10.66 7 78 13600 127.5 <br /> 6/29/2022 No 75.20 782 13.18 1.72 1557.0 292.0 <br /> 8/1/2022 Yes 75 52 7.83 13.26 246 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 13.14 234 1361.3 319.0 <br /> 10/31/2023 Yes 75.61 7.57 9.98 45.3 1254.0 27.9 <br /> Q1 2024 No NM NM NM NM NM NM Inaccessible due to county road conditions. <br /> 5/1/2024 Yes 75.41 7.38 9.69 20.48 1330.0 -148.9 <br /> 9/11/2024 Yes 75.29 7.72 11 33 1 2.17 1354.0 -33.1 <br /> 10/30/2024 Yes 75.35 7.75 9.48 2.38 1396.0 52A <br /> Q1 2025 No NM NM NM NM NM NM Inaccessible due to county road conditions. <br /> NM = Not Measured <br />