2021-01-06_HYDROLOGY - M2007044

• Permit No: M2007044
• IBM Index Class Name: Hydrology
• Doc Date: 1/6/2021
• Doc Name: Hydrology Report
• From: Energy Fuels Resources‎(USA)‎, Inc.
• To: DRMS
• Email Name: ACY
• Media Type: D
• Archive: No

WHIRLWIND MINE,PERMIT NO.M-2007-044
FOURTH QUARTER 2020 HYDROLOGICAL REPORT
Attachment 6.Monitoring Well W-1
Dissolved SpecificOxygen-
Monitoring Sampled Water Level Field pH Temperature Oxygen(mg/L Conductance Reduction
Date YM ft BTOC S.U. (deg.C or% (US/CM) Potential mV Comments
10/21/2008 Yes 73.22 7.96 10.5 0.95 1543 124 Sunny,Dry,see Table 3
12/16/2008 Yes 74.44 7.73 9.9 1.47 1329 187 Overcast,4"snow,see Table 3
2/10/2009 Yes 74.73 7.82 101 093 1251 5 Sunny,Cold,1-2"snow pack,see Table 3
4/20/2009 Yes 75.00 7.34 10.9 0.13 1209 80 Sunny,Dry,see Table 3
6/24/2009 Yes 74.96 7.63 109 -- 1157 -- Raining,cool,see Table 3
9/11/2009 Yes 74.84 7.91 113 023 1219 -75 Sunny,dry,see Table 3
12/10/2009 Yes 74.69 7.66 9.8 1.65 1182 80 Cold,overcast,see Table 3
2/4/2010 Yes 74.40 7.01 107 0.61 1240 -74 Cold,clear skies,3 ft of snow,see Table 3
6!7/2010 Yes 73.98 7.73 12.2 0.25 1239 -111 Hot,clear skies,dry,see Table 3
7/28/2010 No 73.48 NM NM NM NM NM Water level measurement only
11/4/2010 No 74.00 NM NM NM NM NM Water level measurement only
4/18/2011 No 7394 NM NM NM NM NM_Make-up for missed 1 Q11 monitoring
5/24/2011 Yes 73.77 7.85 11.0 0.11 1210 10 Ptly cloudy,warm,see Table 3
8/16/2011 No 7372 NM NM NM NM NM Water level measurement only
10/25/2011 No 73.94 NM NM NM NM NM Water level measurement only,Overcast,light rain
3/28/2012 No 7398 NM NM NM NM NM Water level measurement only,weather dry and calm
5/30/2012 Yes 73.98 7.72 10.9 1.61 1252 NM ORP Probe Broken
8/7/2012 No 7400 NM NM NM NM NM
11/14/2012 No 74.05 NM NM NM NM NM
3/18/2013 No 7395 NM NM NM NM NM
First bail the water was clear,but was muddy for the remainder of
6/17/2013 Yes 74.02 7.31 11.2 37.6% 1216 54.4 the purge.
8/14/2013 N/A N/A N/A N/A N/A N/A N/A Field notes were lost.
11/8/2013 No 73.89 6.38 10.6 0.206 1186 505
Q1 2014 No NM NM NM NM NM NM Inaccessible due to county road conditions.
6/18/2014 Yes 73.27 642 11.3 17 1349 75
9/9/2014 No 74.19 604 14.1 1.4 1386 317
11/13/2014 No 74.29 661 11.0 46 1219 272
3/31/2015 No 74.36 6.50 11.4 5.0 1340 282
5/29/2015 No 74.42 6 74 12.5 30 1438 328
8/5/2015 Yes 74.54 7.40 12.2 2.5 1484 330
11/9/2015 No 74.39 740 11.9 35 1250 326
3/31/2016 No 74.40 7.13 11.05 1.7 1539 425
6/1/2016 Yes 74.40 726 12.04 34 1432 421
8/3/2016 No 74.60 6.51 15.94 2.8 1463 301
10/12/2016 No 74.60 620 14.58 55 1507 290
3/24/2017 No 74.66 6.15 12.75 4.2 1332 504
6/7/2017 Yes 74.65 722 12.66 66 1502 375
9/8/2017 No 74.50 6.95 15.25 5.0 1438 290
10/20/2017 No 74.47 627 11.33 88 1376 803
3/22/2018 No 74.69 7.22 10.88 4.8 1048 290
6/20/2018 Yes 74.69 7.45 11.46 6.5 1014 -7.7
9/7/2018 No 74.69 7.19 11.65 4.5 962 -349.9
12/14/2018 No 74.69 5.99 11.01 NM 1366 293
Q1 2019 No NM NM NM NM NM NM Inaccessible due to county road conditions.
6/25/2019 Yes 74.59 7.53 11.04 70 1265 176.6
9/13/2019 No 74.70 7.03 11.20 2.6 1376 215
11/8/2019 No 7480 7.61 11.93 2.1 1475 261
3/27/2020 No 74.70 7.25 10.06 2.7 1350 115
6/24/2020 Yes 74.88 7.63 1112 3.7 1310 -250
9/11/2020 No 7502 7.72 1049 7.1 1380 54
11/6/2020 No 74.83 6.93 1155 2.2 1610 143
NM=Not Measured