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rr �r rr �r �r rr rr rr r� rr rr rs r� rr �r r r� �r rr <br /> WHIRLWIND MINE, PERMIT NO. M-2007-044 <br /> THIRD QUARTER 2021 HYDROLOGICAL REPORT <br /> Attachment 6.Monitoring Well W-1 <br /> Dissolved Specific Oxygen- <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 /> 12/14/2018 No 74.69 5.99 11.01 NM 1366 293 <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 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 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 11.65 3.0 1519 -39.8 <br /> 7/13/2021 Yes 74.50 6.96 15.01 2.4 1542 480 <br /> 9/9/2021 No 74.80 7.87 12.41 1 2.0 1537 47.9 <br /> NM=Not Measured <br />