DRC-2022-021990 - 0901a068811064fb

October 17, 2022
VIA EXPRESS DELIVERY
Mr. Doug Hansen Director
Division of Waste Management and Radiation Control
Utah Depaitment of Environmental Quality
195 North 1950 West Salt Lake City, UT 84116
Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www .energyfuels.com Re: Transmittal of DMT Performance Standards Monitoring Report and Cell 4A BAT
Performance Standards Monitoring Report for the 3rd Quarter of 2022
Dear Mr. Hansen:
Enclosed please find two copies of the DMT Performance Standards Monitoring Report and Cell 4A
BAT Performance Standards Monitoring Repo1t for the 3rd Quarter of 2022, as required under Parts
I.F.2 and I.F.3 of the White Mesa Mill's State of Utah Groundwater Discharge Permit No.
UGW370004. Also enclosed are two CDs, each with an electronic word-searchable copy of theenclosed Report.
If you have any questions regarding this Report, please contact the undersigned at [phone] or
Mr. Garrin Palmer at [phone].
Yours very truly, <�Jv�e
ENERGY FUELS RESOURCES (USA) INC.
Kathy Weinel
Director, Regulatory Compliance
cc David Frydenlund Garrin Palmer Logan Shumway Scott Bakken Div of Waste Management
and Radiation Control
OCT 19 2022
DRC-2022-021990
WHITE MESA URANIUM MILL
DMT PERFORMANCE STANDARDS MONITORING REPORT AND CELL 4A AND CELL 4B BAT PERFORMANCE STANDARDS MONITORING REPORTS FOR THE 3RD QUARTER OF 2022
1.0 INTRODUCTION
This is the routine Discharge Minimization Technology ("DMT") Performance Standards Monitoring Report for the third quarter of 2022 (the "quarter") prepared by Energy Fuels Resources (USA) Inc. ("EFRI"), as required under Pait I.F.2 of the White Mesa Mill's (the "Mill's") State of Utah Groundwater Discharge Permit No. UGW370004 (the "GWDP"), and the
Routine Cell 4A and Cell 4B Best Available Technology ("BAT") Performance Standards
Monitoring Reports for the quarter, as required under Part I.F.3 of the GWDP.
2.0 MEASUREMENTS TAKEN AND MONITORING PERFORMED
During the quarter, the following DMT monitoring was performed or addressed, as required
under Part I.D.3, I.E. 7, and I.F.11 of the GWDP:
•Weekly tailings wastewater pool elevations for tailings Cells 1 and 3 (PartI.E.7(a));•Quarterly slimes drain water levels in Cell 2 (Part I.D.3(b)(2));•Annual Slimes Drain Compliance (Part I.D.3 (b) (3) and I.F.11);•Weekly feedstock storage area inspections and inspections of feedstock materials
stored outside of the feedstock storage area (Part I.D.3(t) and Parts I.E.7(d); and
(e));•Any tailings cell and pond liner system repairs (Part I.E.7 (t) and Part I.E.(8)(c));•Weekly New Decontamination Pad Inspection (Part I.E.7 (g)) and•Annual Decontamination Pad Concrete Inspection (Part I.F. 11) (not required this
reporting period)
Also during the quarter, the following Cell 4A and 4B BAT performance standards monitoring was performed, or addressed, as applicable and as required by Parts I.E.8 and 1.E.12 of the
GWDP: •Leak detection system ("LDS") monitoring for Cell 4A (Part 1.E.8.(a)), and Cell
4B (Part I.E.12); and•Weekly tailings wastewater pool elevations for tailings Cell 4A (Part I.E.8 (a))and Cell 4B (Part 1.E.12).
During the quarter, the following inspections were also completed:
•LDS monitoring for Cells 1, 2 and 3 pursuant to the Mill's State of UtahRadioactive Materials License No. UT 1900479 (the "License") (Part 11.3).1
3.0 WEEKLY TAILINGS WASTEWATER POOL ELEVATION MONITORING Mill personnel monitored and recorded weekly the elevation of wastewater in the Mill's tailings cells during this quarter except as noted below, to ensure compliance with the maximum wastewater elevation criteria mandated by Parts I.E.7(a)2 and I.E.12(a) of the GWDP. The results of such monitoring, reported as feet above mean sea level ("fmsl"), are included in Attachment A. Part I.D.2 of the GWDP provides that under no circumstances shall the freeboard of any tailings cell be less than three feet, as measured from the top of the flexible membrane liner ("FML"). The top of the FML in Cell 1 is at 5,618.5 fmsl, and the top of the FML in Cell 4B is 5600.4 fmsl. This means that the maximum wastewater pool elevations in Cells 1 and 4B permitted under Part I.D.2 of the GWDP are 5,615.50, and 5,597.40 fmsl, respectively. The maximum wastewater pool elevations in Cells 1 and 4B, as measured during the quarter, are summarized in the following Table 1. The requirements to meet freeboard elevation limits in Cell 3 and Cell 4A were eliminated. The solution elevation measurements in Cell 4A are not required for compliance with freeboard limits but are required for the calculation of the daily allowable volume of fluids pumped from Cell 4A LDS and are collected for this purpose. The freeboard limits established by the GWDP and the "License are slightly different; accordingly, the stricter of the two limits represents the regulatory standard for each cell. As indicated in Table 1, the applicable freeboard limits were not exceeded during the Quarter for any cell. Table 1 -Summary of Waste Water Pool Elevations
Tailings Maximum Maximum Maximum Cell Wastewater Elevation Wastewater Elevation Wastewater Measured During the Permitted Under Elevation Permitted Quarter (fmsl) License Condition Under Part I.D.2 of 10.3 (fmsl) the GWDP (fmsl)
Cell l 5613.33 5,615.40 5,615.50
Cell 3 Not Measured -No Limit No Limit freeboard limit was (5,602.50*) (5,605.50*) removed in QI 2011
Cell 4A 5585.50 - freeboard No Limit No Limit limit was removed in (5,593.74**) (5,595.50**) Ql 2011. Cell 4B 5567.86 5594.60 5597.40 *The Director approved the removal of the Cell 3 freeboard limit and authorized the use of Cell 4B on January 27,2011. Cell 3 is nearly full of solids.** The Director. granted a variance from the Cell 4A freeboard limit on January 13, 2011, and approved the removal of the Cell 4A limit and authorized the use of Cell 4B on January 27, 2011. The previous freeboard limit noted above for Cell 4A was not set out in the License. The freeboard limit of 5,593.74 for Cell 4A was set out in a letter from the Director dated November 20, 2008. The approved DMT Plan, Revision I 1.1 dated January 201 l, included the removal of the freeboard limit for Cell 4A to be replaced by a freeboard limit for Cell 4B that will accommodate the freeboard requirements of Cells I, 4A, and 4B.
2
4.0 QUARTERLY SLIMES DRAIN WATER LEVEL MONITORING
4.1 General
Part I.D.3(b)(l) of the GWDP provides that the Permittee shall at all times maintain the average wastewater recovery head in the slimes drain access pipes of each of Cells 2 and 3 to be as low as is reasonably achievable, in accordance with the DMT Plan. Part I.E.7(b)(5) of the GWDP provides that for Cell 3, this requirement shall apply after initiation of dewatering operations. Part I.D.6(c) of the GWDP provides that, after the Permittee initiates pumping conditions in the
slimes drain layer in Cell 4A, the Permittee will provide: 1) continuous declining fluid heads in the slimes drain layer, in a manner equivalent to the requirements found in Part I.D.3(b ), and 2) a maximum head of 1.0 feet in the tailings (as measured from the lowest point of the upper FML) in 6.4 years or less. Similarly, Part I.D.13(c) of the GWDP provides that, after the Permittee initiates pumping conditions in the slimes drain layer in Cell 4B, the Permittee will provide: 1)
continuous declining fluid heads in the slimes drain layer in a manner equivalent to the
requirements found in Part I.D.3(b), and 2) a maximum head of 1.0 feet in the tailings (as measured from the lowest point of the upper FML) in 5.5 years or less.
The GWDP, Part I.D.3(b)(l) states the "Permitee shall at all times maintain the average
wastewater recovery head in the slimes drain access pipe to be as low as reasonably
achievable ... " Part I.D.3(b)(2) states the "effective July 11, 2011, the Permittee shall conduct a
quarterly slimes drain recovery test. .. ". Monthly testing was conducted through the second quarter of 2011. The frequency change dictated by the GWDP was implemented in the third quarter 2011. The test ensures that each tailings cell meets the following minimum requirements: 1)includes a duration of at least 90-hours, as measured from the time that pumping ceases, and
2)achieves a stable water level at the end of the test, as measured by three consecutive hourly
water level depth measurements with no change in water level, as measured to the nearest 0.01foot.
The GWDP, Part I.E.7(b) requires quarterly monitoring of all slimes drain access pipes in
accordance with I.D.3 as noted above. In addition, for the purposes of monitoring the slimes
drain access pipes, the GWDP Part I.E.7(b) requires: 1) that 1 separate slimes drain recovery test
be performed in each slimes drain for each cell quarterly (upon commencement of dewatering operations), 2) designate, operate, maintain and preserve one water level measuring point of each slimes drain access pipe that has been surveyed by a Utah licensed engineer or land surveyor (upon commencement of dewatering operations), 3) make all slimes drain recovery head test
(depth to fluid) measurements from the same designated measuring point, and 4) record all fluid
depth measurements to the nearest 0.01 foot.
At this time, dewatering operations have not commenced in Cell 3, Cell 4A, or Cell 4B. As a result, the requirements in Part I.E. 7 (b) to monitor and record monthly the depth to wastewater in the slimes drain access pipes as described in Part I.D.3 of the GWDP apply only to Cell 2 at this time. Accordingly, this Report is limited to slimes drain recovery head information relating to Cell 2 only.
3
th
th
4.4 Graphic Comparison to Previous Year
9.1 LDS Monitoring
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment
The LOS pumping and monitoring equipment for both of Cell 4A and Cell 4B, including, but not limited to, the submersible pump, pump controller, head monitoring, and flow meter equipment, operated continuously during the quarter except as noted below.
Cell 4A
During the quarter, there were no failures of any pumping or monitoring equipment that were not repaired and made fully operational within 24-hours of discovery, as contemplated by Part I.E.8(a)(l) of the GWDP.
Cell 4B
During the quarter, there were no failures of any pumping or monitoring equipment that were not repaired and made fully operational within 24-hours of discovery, as contemplated by Part I.E.12(a)(l) of the GWDP.
9.1.2 Measurement of Weekly Fluid Head at the Lowest Point in the Secondary FML
The measurements of the fluid head above the lowest point in the secondary FML for Cells 4A and 4B are provided in Attachment F.
As can be seen from a review of Attachment F, at no point in the quarter did the fluid head in the Cell 4A LOS sump exceed a 1-foot level above the lowest point in the lower FML on the Cell
floor (where for purposes of compliance monitoring, this 1-foot distance equates to 2.28 feet [27.36 inches] above the LOS system transducer), as stipulated by Part I.E.8(a)(2) of the GWDP. During the quarter, the fluid head in the Cell 4A LOS sump did not exceed 4.3 inches above the LOS transducer.
As can be seen from a review of Attachment F, at no point in the quarter did the fluid head in the Cell 4B LOS sump exceed a 1-foot level above the lowest point in the lower FML on the Cell floor, as stipulated by Part I.E.12(2) of the GWDP. For the purposes of compliance monitoring, this 1-foot distance equates to 2.25 feet (27 inches) above the LOS system. During the quarter,
the fluid head in the Cell 4B LOS sump did not exceed 4.72 inches above the LOS transducer.
9.1.3 Measurement of the Volume of Fluids Pumped from the LDS
The measurements of the volume of fluids pumped are provided in Attachment F.
Cell 4A
As can be seen from a review of Attachment F, 219 gallons of fluid were pumped from the Cell 4A LOS for the quarter. Accordingly, the average daily LOS flow volume in Cell 4A did not exceed 24,160 gallons/day, as stipulated by Part I.E.8(a)(3) of the GWDP. 8
10.0 CELL 1, CELL 2, AND CELL 3 LOS MONITORING
The requirement in Section 3.l(a) of the DMT Plan to monitor the LDS for Cells 1, 2, and 3 is a
requirement of the License, and not a DMT performance monitoring standard required by Parts
I.D.3 or I.E.7 of the GWDP. However, DWMRC has requested that the LDS monitoring forCells 1, 2, and 3 be included on the DMT inspection forms and that the results of the monitoringbe reported in the quarterly DMT reports. The Cells 1, 2, and 3 LDS monitoring data areincluded in Attachment F.
10.1 Operational Status of LOS Pumping and Monitoring Equipment
The LDS pumping and monitoring equipment for each of Cell 1, Cell 2, and Cell 3, including, but not limited to, the submersible pump, pump controller, head monitoring, and flow meter equipment, operated continuously during the quarter except as noted below.
For Cell 1, during the quarter, there were no failures of any pumping or monitoring equipment not repaired and made fully operational within 24 hours of discovery.
For Cell 2, during the quarter, there were no failures of any pumping or monitoring equipment not repaired and made fully operational within 24 hours of discovery.
Cell 3
For Cell 3, during the quarter, there were no failures of any pumping or monitoring equipment not repaired and made fully operational within 24-hours of discovery.
10.2 Measurement of the Volume of Fluids Pumped from the LOS
No fluids were pumped from the Cells 1, 2 or 3 LDSs during the quarter because no fluids were detected in the Cells 1, 2 or Cell 3 LDSs.
10.3 Measurement of Weekly Wastewater Fluids in Cells 1, 2, and 3
A summary of the fluid elevations for the Cells 1, 2 and 3 LDSs for the quarter are provided in
Attachment F. The LDS for Cells 1, 2, and 3 were dry during the quarter.
10.4 Slimes Drain Recovery Head Monitoring
As the Mill has not initiated pumping in the Cell 3 slimes drain system at this time, recovery head tests and fluid level measurements are not required at this time.
Date Cell 1 Cell 3 1 Cell 4A 2 Cell 4B 3Free board 5615.40 -RML 5594.60 -RML
Limit 5615.50- GWDP No Limit 5597.40 - GWDP
7/7/2022 5612.81 No Longer Required 5585.50 5566.38
7/15/2022 5613.07 No Longer Required 5585.41 5565.75
7/22/2022 5613.19 No Longer Required 5585.31 5566.05
7/27/2022 5613.11 No Longer Required 5585.37 5566.23
8/5/2022 5613.05 No Longer Required 5585.33 5566.35
8/12/2022 5612.96 No Longer Required 5585.11 5566.54
8/18/2022 5612.97 No Longer Required 5585.07 5566.65
8/25/2022 5613.28 No Longer Required 5585.15 5567.05
9/2/2022 5613.28 No Longer Required 5585.07 5567.50
9/8/2022 5613.26 No Longer Required 5584.98 5567.49
9/15/2022 5613.30 No Longer Required 5584.94 5567.73
9/23/2022 5613.33 No Longer Required 5585.10 5567.53
9/30/2022 5613.22 No Longer Required 5584.97 5567.86
NM = Not Measured
1Cell 3 is nearly full of solids. The freeboard limit is no longer required and the weekly measurements are no
longer required per the January 27 and March 14, 2011 letters from DWMRC.
2 The previous freeboard limit of 5,593.74 for Cell 4A is set out in a letter from the Director dated November
20, 2008. EFRI proposed in the DMT Plan revision dated November 12, 2010 the removal of the freeboard
limit for Cell 4A to be replaced by a freeboard limit for new Cell 4B that will accommodate the freeboard
requirements of Cells 3, 4A, and 4B. The Director granted a variance from the Cell 4A freeboard limit on
January 13, 2011 and approved the removal of the Cell 4A limit and the use of Cell 4B on January 27, 2011.
The weekly measurements are no longer required for compliance with freeboard limts, but are required for the
calculation of the daily allowable volume of fluids pumped from the Cell 4A LDS. 3 The freeboard limit listed is the value specified in the DMT plan when the pool surface area is 40 acres. A
pool surface area of 40 acres is used because there are no beaches present in Cell 4B at this time.
QUARTERLY HEAD MEASUREMENT TEST
Location: White Mesa Mill
Slimes Cell # 2
700 40.50
800 39.75
900 39.37
1000 38.97
1100 38.48
1200 38.13
1300 37.78
1400 37.51
1500 37.20
Comments:
34.49
34.38
34.26
34.15
34.05
33.93
33.81
33.70
33.58
Date: 9/21/2022 -9/27/2022
Sampler: Deen Lyman, Tanner Holliday
32.41 31.51 30.68 30.05
32.36 30.04
32.31 30.03
32.26 30.01
32.21 29.98
32.15 29.96
32.08 29.93
32.01 29.9
31.94 29.86
29.57
29.57
29.57
Piezometer
C2-P01
C2-P02
C2-P03
C2-P04
C2-P05
C2-P06
C2-P07
C2-P08
C2-P09
C2-P10
C2-P11
C2-P12
C2-P13
C2-P14
C2-P15
C2-P16
C2-P17
C2-P18
C2-P19
C2-P20
C2-P21
C2-P22
C2-P23
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
6/16/2016 6/22/2016 6/30/2016 1n12016 7/14/2016 7/22/2016 7/28/2016 8/5/2016
11.46 11.34 11.22 11.17 11.22 11.13 11.01 10.94
8.98 8.94 13.96 13.79 13.73 13.54 13.44 13.36
13.23 13.01 12.91 12.66 12.71 12.72 12.55 12.25
10.91 10.82 15.78 15.66 15.70 15.62 15.24 15.14
14.04 13.95 18.89 18.80 18.73 18.73 18.64 18.37
17.52 17.45 17.32 17.29 17.26 17.12 16.96 16.87
15.21 15.07 15.09 15.02 15.03 15.00 14.30 14.23
18.69 18.56 18.54 18.48 18.46 18.45 18.30 18.19
25.25 23.76 23.86 23.82 23.91 23.71 23.60 23.50
22.49 21.93 22.62 22.80 22.96 23.08 22.78 22.74
20.71 20.45 20.78 20.79 20.91 20.92 20.35 20.31
21.12 19.72 25.61 25.77 25.97 26.06 25.89 25.48
16.85 16.83 21.72 21.55 21.48 21.47 21.30 21.14
22.85 22.56 22.60 22.65 22.75 22.60 22.40 22.38
21.37 21.17 21.20 21.16 21.21 21.08 20.80 20.75
20.24 20.01 20.06 20.02 20.10 20.02 19.80 19.71
23.01 22.87 22.90 22.75 22.77 22.75 22.60 22.47
18.70 18.65 18.62 18.52 18.57 18.58 18.38 18.26
10.31 10.28 10.31 10.35 10.50 10.57 10.50 10.50
17.15 17.10 17.02 16.97 16.98 16.97 16.82 16.72
14.96 14.88 14.87 14.76 14.82 14.85 14.68 14.58
12.42 12.34 12.42 12.30 12.40 12.48 12.32 12.23
9.93 9.76 9.74 9.65 9.73 9.85 9.78 9.72
Notes:
1.Piezometers 9 and 15 were found broken at a joint due to construction work in the area between
July 28, 2016 and Augus! 5, 2016. DTW r;adings on August 5, 2016 were taken before these
were able to be read for this date. The piezometer was repaired and a new elevation measured on
September 11, 2018.
8/11/2016 8/19/2016
11.00 10.86
13.43 13.02
12.22 11.75
15.16 15.02
18.31 17.95
16.91 16.34
14.30 14.16
23.26 22.90
23.52 23.24
27.87 27.80
25.35 25.28
25.61 25.58
21.10 20.69
22.46 22.21
20.51 20.54
19.78 19.59
22.55 22.31
18.31 18.10
10.65 10.55
16.75 16.59
14.65 14.46
12.34 12.18
9.76 9.77
8/26/2016 9/2/2016
10.81 13.14
12.80 12.42
11.73 16.62
14.71 14.42
17.90 17.83
16.30 16.05
13.74 13.61
22.96 22.81
23.05 22.92
27.40 27.16
25.10 24.73
25.65 25.29
20.66 20.52
21.96 21.79
20.10 20.10
19.50 19.31
22.34 22.21
18.11 18.01
10.70 10.71
16.61 16.53
14.60 14.33
12.29 12.15
9.86 9.79
Enerc y Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 9/9/2016 9/16/2016 9/23/2016 9/30/2016 1on12016 10/13/2016 10/21/2016 10/28/2016 11/4/2016 11/11/2016 11/18/2016 11/25/2016
E nergy F I R ue s esources (USA) Inc. White Mesa e M" C II 2 Standpipe Piezometers (ft.
Piezometer 12/2/2016 12/8/2016 12/13/2016 12/20/2016 12/30/2016 1/6/2017 1/11/2017 1/20/2017 1/27/2017 2/3/2017 2/17/2017 2/22/2017
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 3/3/2017 3/10/2017 3/17/2017 3/24/2017 3/31/2017 4/14/2017 4/20/2017 4/27/2017 5/2/2017 5/12/2017 5/19/2017
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 5/25/2017 5/31/2017 6/8/2017 6/16/2017 6/23/2017 6/30/2017 7/6/2017 7/14/2017 7/28/2017 8/4/2017 9/1/2017 10/13/2017
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 11/10/2017 12/6/2017 1/10/2018 2/1/2018 3/16/2018 4/5/2018 5/11/2018 6/14/2018 7/11/2018 8/2/2018 9/6/2018 10/1/2018
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 11/5/2018 12/4/2018 1/8/2019 2/1/2019 3/20/2019 4/4/2019 5/6/2019 6/5/2019 7/3/2019 Bn/2019 9/5/2019 10/2/2019 11ll/2019
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 12/4/2019 1/3/2020 2/14/2020 3/3/2020 4/1/2020 5/1/2020 6/2/2020 7/14/2020 8/5/2020 9/2/2020 10/1/2020 11/2/2020 12/2/2020
Enen y Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers (ft.)
Piezometer 1/4/2021 2/4/2021 3/1/2021 4/5/2021 5/5/2021 6/3/2021 7/9/2021 8/10/2021 9/8/2021 1on12021 11/4/2021 12/3/2021 1/13/2022
E nergy F I R ues esources nc. ,te esa e an pipe 1ezome ers (USA) I Wh" M M"II C 112 St d . p· t (ft)
Piezometer 2/4/2022 3/2/2022 4/6/2022 5/2/2022 6/22/2022 7/6/2022 8/4/2022 9/1/2022
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation (ft amsl)
Piezometer 6/16/2016 6/22/2016 6/30/2016 1n1201s 7/14/2016 7/22/2016 7/28/2016 8/5/2016 8/11/2016 8/19/2016 8/26/2016 9/2/2016
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation (ft ams!)
Piezometer 9/9/2016 9/16/2016 9/23/2016 9/30/2016 10n12016 10/13/2016 10/21/2016 10/28/2016 11/4/2016 11/11/2016 11/18/2016 11/25/2016
nergy F I R ue s esources
Piezometer 12/2/2016 12/8/2016 12/13/2016
nc. Ie (USA} I Wh"t M esa e an 1p1pe Iezome ers a er ur ace evaIon M"II C II 2 St d . p· t W t S f El f (ft ams
12/20/2016 12/30/2016 1/6/2017 1/11/2017 1/20/2017 1/27/2017 2/3/2017 2/17/2017 2/22/2017
Piezometer
C2-P01
C2-P02
C2-P03
C2-P04
C2-P05
C2-P06
C2-P07
C2-P08
C2-P09
C2-P10
C2-P11
C2-P12
C2-P13
C2-P14
C2-P15
C2-P16
C2-P17
C2-P18
C2-P19
C2-P20
C2-P21
C2-P22
C2-P23
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation (ft amsl)
II I I
3/3/2017 3/10/2017 3/17/2017 3/24/2017 3/31/2017 4/7/2017
5611.28 5611.35 5611.33 5611.42 5611.75 5611 .40
5611.83 5611.91 5611.89 5612.02 5612.30 5611.89
5611.37 5611.46 5611.41 5611.50 5611.81 5611.46
5613.07 5613.12 5613.14 5613.29 5613.47 5613.06
5607.80 5607.87 5607.81 5607.83 5608.10 5607.81
5608.55 5608.63 5608.63 5608.71 5608.99 5608.61
5609.53 5609.58 5609.58 5609.68 5609.84 5609.52
5604.45 5604.59 5604.56 5604.68 5605.04 5604.59
5602.29 5602.39 5602.36 5602.39 5602.94 5602.49
5600.14 5600.33 5600.80 5601.02 5601.54 5601.00
5601.24 5600.98 5600.97 5601.22 5601.56 5601.02
5597.38 5597.46 5597.48 5597.93 5598.58 5597.56
5604.92 5604.99 5604.98 5605.12 5605.41 5604.68
5603.32 5603.39 5603.34 5603.42 5603.76 5603.39
5603.36 5603.31 5603.29 5603.46 5603.72 5603.27
5603.66 5603.71 5603.67 5603.82 5604.08 5603.70
5606.88 5606.98 5606.93 5606.98 5607.31 5606.98
5607.00 5607.10 5607.05 5607.21 5607.50 5607.07
5608.10 5608.23 5608.21 5608.28 5608.62 5608.32
5610.08 5610.18 5610.11 5610.15 5610.43 5610.18
5611.42 5611.49 5611.43 5611.51 5611.81 5611.38
5612.51 5612.56 5612.50 5612.59 5612.84 5612.43
5613.52 5613.55 5613.59 5613.73 5613.77 5613.44
4/14/2017
5611.53
5612.02
5611.55
5613.17
5607.88
5608.71
5609.61
5604.76
5602.59
5601.06
5601.06
5597.53
5605.11
5603.48
5603.36
5603.81
5607.07
5607.25
5608.44
5609.83
5611.49
5612.52
5613.63
I!
4/20/2017 4/27/2017 5/2/2017 5/12/2017 5/19/2017
5611.46 5611.71 5611.51 5611.49 5611.48
5611.92 5612.17 5611.93 5611.90 5611.86
5611.48 5611.70 5611.47 5611.42 5611.38
5613.02 5613.25 5613.01 5612.99 5612.96
5607.84 5607.99 5607.82 5607.73 5607.69
5608.63 5608.83 5608.60 5608.48 5608.50
5609.50 5609.65 5609.46 5609.42 5609.40
5604.66 5604.86 5604.63 5604.53 5604.51
5602.44 5602.64 5602.44 5602.39 5602.30
5600.95 5601.12 5600.92 5600.88 5600.86
5600.97 5601.12 5600.92 5600.23 5600.91
5597.36 5597.49 5597.24 5597.22 5597.15
5604.99 5605.21 5604.97 5604.93 5604.89
5603.58 5603.74 5603.53 5603.49 5603.40
5603.65 5603.73 5603.53 5603.50 5603.40
5604.33 5604.26 5604.05 5603.98 5603.89
5607.04 5607.14 5607.02 5606.99 5606.95
5607.16 5607.43 5607.15 5607.13 5607.10
5608.80 5609.02 5608.89 5608.89 5608.92
5610.23 5610.43 5610.23 5609.99 5610.04
5611.40 5611.64 5611.33 5611.30 5611.24
5612.41 5612.64 5612.36 5612.29 5612.25
5613.73 5613.94 5613.77 5613.57 5612.78
*Week of 4/20/17 Piezometer 19 was hit by equipment
and then raised and piezometer 16 was raised to keep
above cover.
Eneqy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation (ft amsl)
Piezometer 5/25/2017 5/31/2017 6/8/2017 6/16/2017 6/23/2017 6/30/2017 7/6/2017 7/14/2017 7/28/2017 8/4/2017 9/1/2017 10/13/2017
C2-P01 5611.47 5611.58 5611.60 5611.60 5611.67 5611.73 5611.65 5611.76 5611.96 5612.01 5612.12 5612.08 C2-P02 5611.84 5611.93 5611.93 5611.92 5611.98 5612.00 5611.91 5611.98 5612.14 5612.18 5612.29 5612.30
C2-P03 5611.37 5611.45 5611.43 5611.38 5611.42 5611.46 5611.34 5611.41 5611.56 5611.59 5611.89 5611.82
C2-P04 5612.94 5612.94 5612.94 5612.93 5612.99 5612.98 5612.89 5612.90 5613.00 5613.01 5613.10 5613.06
C2-P05 5607.63 5607.78 5607.74 5607.66 5607.65 5607.66 5607.54 5607.59 5607.67 5607.69 5607.83 5607.87
C2-P06 5608.48 5608.56 5608.53 5608.43 5608.50 5608.50 5608.39 5608.43 5608.52 5608.54 5608.56 5608.58
C2-P07 5609.37 5609.36 5609.34 5609.32 5609.36 5609.33 5609.26 5609.26 5609.32 5609.32 5609.32 5609.25
C2-P08 5604.53 5604.61 5604.56 5604.49 5604.50 5604.53 5604.38 5604.44 5604.53 5604.54 5604.61 5604.77
C2-P09 5602.29 5602.39 5602.38 5602.29 5602.27 5602.46 5602.29 5602.28 5602.30 5602.32 5602.32 5602.39
C2-P10 5600.85 5600.88 5600.85 5600.81 5600.92 5601.16 5600.87 5600.81 5600.82 5600.84 5600.83 5600.88
C2-P11 5600.90 5600.84 5600.85 5600.81 5600.98 5601.22 5600.96 5600.92 5600.90 5600.89 5600.90 5600.97
C2-P12 5597.15 5597.08 5597.07 5596.99 5597.36 5597.79 5597.21 5597.02 5596.94 5596.90 5596.88 5596.84
C2-P13 5604.83 5604.93 5604.91 5604.90 5604.89 5604.94 5604.84 5604.88 5604.92 5605.00 5605.08 5605.18
C2-P14 5603.34 5603.45 5603.42 5603.34 5603.38 5603.48 5603.31 5603.32 5603.37 5603.39 5603.38 5603.45
C2-P15 5603.38 5603.41 5603.39 5603.32 5603.44 5603.46 5603.30 5603.39 5603.35 5603.36 5603.35 5603.38
C2-P16 5603.80 5603.89 5603.85 5603.79 5603.88 5603.89 5603.75 5603.75 5603.78 5603.79 5603.78 5603.81 C2-P17 5606.93 5607.05 5607.04 5606.96 5606.99 5607.02 5606.90 5606.98 5607.13 5607.17 5607.29 5607.44
C2-P18 5607.04 5607.13 5607.13 5607.08 5607.12 5607.06 5607.00 5607.07 5607.20 5607.22 5607.35 5607.50
C2-P19 5608.84 5609.05 5609.08 5609.02 5609.07 5609.10 5609.02 5609.11 5609.24 5609.28 5609.32 5609.32 C2-P20 5610.08 5610.10 5610.11 5610.03 5610.05 5610.10 5609.97 5610.04 5610.19 5610.20 5610.35 5610.49
C2-P21 5611.22 5611.24 5611.23 5611.12 5611.15 5611.08 5610.99 5611.04 5611.18 5611.19 5611.29 5611.42
C2-P22 5612.21 5612.27 5612.24 5612.16 5612.19 5612.19 5612.05 5612.09 5612.20 5612.21 5612.25 5612.29
C2-P23 5612.76 5613.67 5613.67 5613.64 5613.68 5613.67 5613.56 5613.61 5613.62 5613.60 5613.66 5613.68
Piezometer
E ner� y F I R ues esources nc. 1te esa 111 e 2 tan pipe 1ezometers (USA) I Wh" M M" C II S d . p· ater S rf El u ace evat1on (ft ams I)
11/10/2017 12/6/2017 1/10/2018 2/1/2018 3/16/2018 4/5/2018 5/11/2018 6/14/2018 7/11/2018 8/2/2018 9/6/2018 10/1/2018
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation {ft amsl)
Piez.9meter 11/p/2018. 12/4/2018 1/8/2019 2/1/2019 3/20/2019 4/4/2019 5/6/2019 6/5/2019 7/3/2019 8ll/2019 9/5/2019 10/2/2019 11ll/2019
E
Piezometer 12/4/2019
nergy F I R ue s esources nc. 1e esa e an pipe 1ezome ers a er u ace eva 10n (USA) I Wh"t M M"II C 112 St d . p· t W t S rf El f (ft ams
1/3/2020 2/14/2020 3/3/2020 4/1/2020 5/1/2020 6/2/2020 7/14/2020 8/5/2020 9/2/2020 10/1/2020 11/2/2020
I)
12/2/2020
E
Piezometer 1/4/2021
nergy F I R ue s esources nc. 1te (USA) I Wh" M esa e an 1p1pe 1ezometers M"II C II 2 St d . p· ater S rf El u ace evat1on (ft ams
2/4/2021 3/1/2021 4/5/2021 5/5/2021 6/3/2021 7/9/2021 8/10/2021 9/8/2021 1on12021 11/4/2021 12/3/2021
I}
1/13/2022
Piezometer
C2-P01
C2-P02
C2-P03
C2-P04
C2-P05
C2-P06
C2-P07
C2-P08
C2-P09
C2-P10
C2-P11
C2-P12
C2-P13
C2-P14
C2-P15
C2-P16
C2-P17
C2-P18
C2-P19
C2-P20
C2-P21
C2-P22
C2-P23
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers
Water Surface Elevation (ft amsl)
2/4/2022 3/2/2022 4/6/2022 5/2/2022 6/22/2022 7/6/2022 8/4/2022 9/1/2022
5610.54 5610.29 5610.49 5610.42 5610.51 5610.74 5610.98 5611.22
5610.83 5610.39 5610.60 5610.45 5610.32 5610.53 5610.77 5611.01
5609.78 5609.46 5609.62 5609.46 5609.33 5609.49 5609.65 5609.86
5611.17 5610.85 5610.98 5610.84 5610.71 5610.90 5611.07 5611.16
5605.79 5605.62 5605.64 5605.49 5605.31 5605.36 5605.38 5605.49
5606.69 5606.47 5606.58 5606.38 5606.13 5606.26 5606.30 5606.37
5607.24 5607.02 5607.09 5606.97 5606.77 5606.90 5606.96 5606.97
5602.94 5602.72 5602.85 5602.65 5602.38 5602.54 5602.57 5602.68
5601.22 5601.17 5601.22 5601.05 5600.93 5600.93 5600.90 5600.92
5599.42 5599.31 5599.35 5599.20 5598.98 5599.07 5599.07 5600.01
5599.38 5599.14 5599.11 5598.99 5598.84 5598.90 5598.87 5598.88
5595.21 5594.98 5594.91 5594.75 5594.50 5594.54 5594.53 5594.53
5603.54 5603.31 5603.44 5603.22 5603.00 5603.16 5603.24 5603.32
5601.69 5601.62 5601.68 5601.58 5601.33 5601.42 5601.45 5601.53
5601.60 5601.51 5601.57 5601.47 5601.24 5601.34 5601.37 5601.44
5601.73 5601.88 5601.67 5601.87 5601.64 5601.76 5601.79 5601.85
5605.40 5605.52 5605.25 5605.48 5605.16 5605.25 5605.33 5605.44
5604.14 5604.14 5603.91 5604.06 5603.65 5603.78 5603.88 5604.04
5606.08 5606.27 5606.05 5606.33 5606.12 5606.25 5606.33 5606.44
5608.39 5608.49 5608.22 5608.45 5608.17 5608.24 5608.31 5608.43
5608.81 5608.87 5608.62 5608.84 5608.42 5608.53 5608.64 5608.81
5609.21 5609.24 5609.07 5609.24 5608.86 5608.99 5609.08 5609.21
5609.91 5609.66 5609.66 5609.55 5609.33 5609.37 5609.46 5609.59
5,615
5,610
5,605
> (1,1 w
(1,1 > (1,1 5,600 ...I
(1,1
5,595 -C2-P01 -C2-P02 ...._ C2-P03
-C2-P07 �C2-P08 �C2-P09
�C2-P13 �C2-P14 -C2-P15
�C2-P19 �C2-P20 -e-C2-P21
5,590
Jun-16 Dec-16 Jun-17 Dec-17
-.tr-C2-P04
-e-C2-P10
�C2-P16
�C2-P22
Jun-18
Figure 2 -Cell 2 Standpipe Piezometers
Water Level Elevations
�C2-P0S �C2-P06
�C2-P11 �C2-P12
Note (1): Pieozometer C2-P01 reading for Mar 20, 2019
--a-C2-P17 �C2-P18 was erroneous due to an issue with the water level meter
�C2-P23
Dec-18 Jun-19 Dec-19 Jun-20 Dec-20 Jun-21
Date
Dec-21 Jun-22 Dec-22
2216500
C2-P01 + C2-P02 + ------
2217000 2217500 2218000
C2-P13 +
2218500
C2-P17 +
2219000
C2-P20 +
C722
C2-P23 '+
--2219500
g � g ;,-------t---------t--------+---------+---------4--------�--------t----�;
2216500 2217000
WI ENERGYFUELS
2217500
0 200
0 50
400
Feet
100
Meters
2218000
800
200
2218500
N A
2219000 2219500
ENERGY FUELS INC.
225 Union Blvd, Suite 600
Lakewood, Colorado 80228
Cell 2
July 2022 Piezometer Contours
Date: 9/19/2022 JA
�
2216500 2217000 2217500 2218000 2218500 2219000 2219500
0 ..� \� I '6!, 0 X> / c2+os� '8'
'
2+0 C2-P13 C2-P17 \+ +
C2-P01 C2-P02 I I+ + I G2-P.06 I \ I <C2-P21 /
0 \0 0 :z � 2-P07 -C I )t ! I I -I
<:) P15 C2-P22 ..... G2-P I(f? I � "+ l I � / I & I C2-P.16 /
ff/ lcr.r1s �
J (0 C2-P23 lO
0 I � I I
0 co "' If) -� I 1/) / I
I �,-----,------+-------t------+---------+-------+------L----1
2216500 2217000
'6/'J ENERGY FUELS
2217500
0 200 400
Feet
0 50 100
Meters
2218000
800
200
2218500
N A
2219000 2219500
ENERGY FUELS INC.
225 Union Blvd, Suite 600 Lakewood, Colorado 80228
Cell 2 August 2022 Piezometer Contours Date: 9/19/2022 JA
0 0 .,..-�
0 i �
0 8 � �
0 0 "'
�
2216500 2217000 2217500 2218000 2218500 2219000 2219500
0
\ / \ �
� �
� 'B, I \c2-P17 ' � �2-P0 1C2-P08 C2-P13 G2-03 c21: + + + c2+20 ( C2-P01 --C2-P02 + +--
\ + I /;C2-P21 & +0 IO 0
\ � 2-POV �
I ,II H\ c2+1s c2.:p22
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,------,---------j----------\--------1----------+----------l--------L---J_�
�
2216500 2217000
'61:>J ENERGY FUELS
2217500
0
0
200
50
400
Feet
100
Meters
2218000
200
2218500
800 N A
2219000 2219500
ENERGY FUELS INC.
225 Union Blvd, Suite 600
Lakewood, Colorado 80228
Cell 2
September 2022 Piezometer Contours
Date: 9/19/2022 IA
Feet Below Top of Standpipe
1/30/2009
6/30/2009
11/30/2009
4/30/2010
9/30/2010
2/28/2011
7/31/2011
12/31/2011
5/31/2012
10/31/2012
3/31/2013
8/31/2013
1/31/2014
6/30/2014
11/30/2014
4/30/2015
9/30/2015
2/29/2016
7/31/2016
12/31/2016
5/31/2017
10/31/2017
3/31/2018
8/31/2018
1/31/2019
6/30/2019
11/30/2019
4/30/2020
9/30/2020
2/28/2021
7/31/2021
12/31/2021
5/31/2022
Cell 4A LDS Monitoring Information
July 2022 August2022 September 2022
Weekly measurements in
inches from transducer at Weekly measurements in Weekly measurements in
the bottom of the LDS Flow Meter inches from transducer at the Flow Meter inches from transducer at the Flow Meter
Date sump. in Gallons Date bottom of the LDS sump. in Gallons Date bottom of the LDS sump. in Gallons
7/1/22 3.8 708626 8/1/22 3.0 708802 9/1/22 3.4 708833 7/2/22 3.8 708626 8/2/22 3.0 708802 9/2/22 3.4 708833 7/3/22 3.8 708626 8/3/22 3.0 708802 9/3/22 3.4 708833 7/4/22 3.9 708626 8/4/22 3. l 708802 9/4/22 3.5 708833 7/5/22 3.9 708626 8/5/22 3.2 708802 9/5/22 3.5 708833 7/6/22 3.9 708626 8/6/22 3.l 708802 9/6/22 3.5 708833 7/7/22 3.9 708626 8/7/22 3.1 708802 9/7/22 3.5 708833 7/8/22 3.9 708626 8/8/22 3.2 708802 9/8/22 3.5 708833 7/9/22 4.0 708626 8/9/22 3.2 708802 9/9/22 3.6 708833 7/10/22 3.9 708626 8/10/22 3.2 708802 9/10/22 3.6 708833 7/11/22 4.0 708626 8/11/22 3.2 708802 9/11/22 3.6 708833 7/12/22 4.0 708626 8/12/22 3.3 70882 9/12/22 3.6 708833 7/13/22 4.0 708626 8/13/22 3.3 708802 9/13/22 3.6 708833 7/14/22 4.1 708626 8/14/22 3.3 708802 9/14/22 3.7 708833 7/15/22 4.1 708626 8/15/22 3.4 708802 9/15/22 3.7 708833 7/16/22 4.1 708626 8/16/22 3.4 708802 9/16/22 3.7 708833 7/17/22 4.2 708626 8/17/22 3.4 708802 9/17/22 3.7 708833 7/18/22 4.2 708626 8/18/22 3.4 708802 9/18/22 3.8 708833 7/19/22 4.2 708626 8/19/22 3.4 708802 9/19/22 3.8 708833 7/20/22 4.2 708626 8/20/22 3.5 708802 9/20/22 3.8 708833 7/21/22 4.3 708626 8/21/22 3.5 708802 9/21/22 3.8 708833 7/22/22 4.3 708626 8/22/22 3.5 708802 9/22/22 3.8 708833 7/23/22 4.3 708626 8/23/22 3.5 708802 9/23/22 3.8 708833 7/24/22 4.3 708626 8/24/22 3.5 708802 9/24/22 3.9 708833 7/25/22 4.3 708626 8/25/22 3.2 708833 9/25/22 3.9 708833 7/26/22 2.7 708802 8/26/22 3.2 708833 9/26/22 4.0 708833 7/27/22 2.7 708802 8/27/22 3.2 708833 9/27/22 4.0 708833 7/28/22 2.9 708802 8/28/22 3.2 708833 9/28/22 4.0 708833 7/29/22 2.9 708802 8/29/22 3.3 708833 9/29/22 3.7 708845 7/30/22 2.9 708802 8/30/22 3.4 708833 9/30/22 3.8 708845 7/31/22 3.0 708802 8/31/22 3.4 708833
Total Gallons Pumped per Month 176 31 12
Total Gallons pumped for Q3 219
10
10
X
Max head on Cell 4A FML
Max elevation (ft.)
FML elevation (ft.)
Head (ft.)
From BAT O&M Table lA (gallon/acre/day)
Acres of fluid based on maximum level (acres)
Max allowable flow rate (gal/day)
4A-Q3 2022
5585.5
5555.55
29.95
543.88
39.32
21,385
Max head on Cell 4B FML
Max elevation (ft.)
FML elevation (ft.)
Head (ft.)
From BAT O&M Table 1B (gallon/acre/day)
Acres of fluid based on maximum level (acres)
Max allowable flow rate (gal/day)
4B -Q3 2022
5567.86
5557.50
10.36
317.00
31.38
9,947
Cell 1, Cell 2, and Cell 3 LOS Monitoring Information -Third Quarter 2022
Cell 1 Cell 2 Cell 3
Measurement in inches Measurement in inches Measurement in inches
Date from transducer at the Date from transducer at the Date from transducer at the
bottom of the LDS sump. bottom of the LDS sump. bottom of the LDS sump.
7/7/2022 Dry 7/7/2022 Dry 7/7/2022 Dry
7/15/2022 Dry 7/15/2022 Dry 7/15/2022 Dry
7/22/2022 Dry 7/22/2022 Dry 7/22/2022 Dry
7/27/2022 Dry 7/27/2022 Dry 7/27/2022 Dry
Cell 1 Cell 2 Cell 3
Measurement in inches Measurement in inches Measurement in inches
Date from transducer at the Date from transducer at the Date from transducer at the
bottom of the LOS sump. bottom of the LDS sump. bottom of the LOS sump.
8/5/2022 8/5/2022 Dry 8/5/2022
8/12/2022 8/12/2022 Dry 8/12/2022
8/18/2022 8/18/2022 Dry 8/18/2022
8/25/2022 8/25/2022 Dry 8/25/2022
Cell 1 Cell 2 Cell 3
Measurement in inches Measurement in inches Measurement in inches
Date from transducer at the Date from transducer at the Date from transducer at the
bottom of the LDS sump. bottom of the LOS sump. bottom of the LDS sump.
9/2/2022 Dry 9/2/2022 Dry 9/2/2022 Dry
9/8/2022 Dry 9/8/2022 Dry 9/8/2022 Dry
9/15/2022 Dry 9/15/2022 Dry 9/15/2022 Dry
9/23/2022 Dry 9/23/2022 Dry 9/23/2022 Dry
9/30/2022 Dry 9/30/2022 Dry 9/30/2022 Dry
I
UTAH
*
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ENERGY FUELS RESOURCES (USA), INC. WHITE MESA MILL San Juan County, Utah
Feedstock Storage Area Map D Feedstock Storage Area
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0 50 100 200
Feet
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ENERGY FUELS RESOURCES (USA), INC. WHITE MESA MILL San Juan County, Utah
Feedstock Storage Area Map CJ Feedstock Storage Area
Date: January 2022 Source: Energy Fuels, 2022
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UTAH
*
ENERGY FUELS RESOURCES (USA), INC. WHITE MESA MILL San Juan County, Utah
Feedstock Storage Area Map
CJ Feedstock Storage Area
Date: January 2022 Source: Energy Fuels, 2022
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0 50 100 200
Feet
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I
UTAH
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ENERGY FUELS RESOURCES (USA), INC. WHITE MESA MILL San Juan County, Utah
Feedstock Storage Area Map
c:J Feedstock Storage Area
Date: January 2022 Source: Energy Fuels, 2022
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0 50 100 200
Feet
Energy Fuels Resources (USA) Inc.
White Mesa Mill
Precipitation Chart
Rain or Snow Recorded in Inches of Moisture Received
YEAR 2022
Rain Snow
1 17
2 18
3 19 . 0 \
4 20
5 21 •11
6 22 •>37 23 8 24
9 25
10 26
11 27 12 28
13 29 14 30
15 31 16
Combined
Month July
Rain Snow
.�'I
•OLf
.05
Total: LD3
Energy Fuels Resources (USA) Inc.
White Mesa Mill
Precipitation Chart
Rain or Snow Recorded in Inches of Moisture Received
Rain Snow
1 17
2 18
3 19
4 20
5 21
6 22
8 24
9 25
10 26
11 27
12 28
13 29
14 30
15 31
16
Month August
Rain Snow
Energy Fuels Resources (USA) Inc.
White Mesa Mill
Precipitation Chart
Rain or Snow Recorded in Inches of Moisture Received
YEAR 2022
Rain Snow
1 17 2 18
D.� 3 19 C!R!! ()).1)
4 20
5 21 6 22 7 23
8 24 9 25
10 26
11 27
12 28 OJ� 13 29
14 30
15 31
16
Combined
Month September
Rain Snow
,.03 .. yo .. �f>
Total: ). 0 0