DRC-2023-004032 - 0901a068811ec768

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~'T:NERGYFUELS
April 27, 2023
VIA EXPRESS DELIVERY
Mr. Doug Hansen
Director
Division of Waste Management and Radiation Control
Utah Department 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
WW\\ .energy fuel .com
Div of Ne ste Management
and Rad, 11011 Cortrol
MAY O 4 2023
Re: Transmittal of DMT Performance Standards Monitoring Report and Cell 4A BAT
Performance Standards Monitoring Report for the 1st Quarter of 2023
Dear Mr. Hansen:
Enclosed please find two copies of the DMT Performance Standards Monitoring Report and Cell 4A
BAT Performance Standards Monitoring Report for the 1st Quarter of 2023, 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 the
enclosed Report.
If you have any questions regarding this Report, please contact the undersigned at [phone] or
Mr. Garrin Palmer at [phone].
Yours very truly,
ENERGY FUELS RESOURCES (USA) INC.
Kathy W einel
Director, Regulatory Compliance
cc David Frydenlund
Garrin Palmer
Logan Shumway
Scott Bakken
DRC-2023-004032
April 27, 2023
VIA EXPRESS DELIVERY
Mr. Doug Hansen
Director
Division of Waste Management and Radiation Control
Utah Department 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
\V\ww.energyfuels.com
Re: Transmittal of DMT Performance Standards Monitoring Report and Cell 4A BAT
Performance Standards Monitoring Report for the 1st Quarter of 2023
Dear Mr. Hansen:
Enclosed please find two copies of the DMT Performance Standards Monitoring Report and Cell 4A
BAT Performance Standards Monitoring Report for the 1st Quarter of 2023, 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 the
enclosed Report.
If you have any questions regarding this Report, please contact the undersigned at [phone] or
Mr. Garrin Palmer at [phone].
Yours very truly,
ENERGY FUELS RESOURCES {USA) INC.
Kathy Weinel
Director, Regulatory Compliance
cc David Frydenlund
Garrin Palmer
Logan Shumway
Scott Bakken
WHITE MESA URANIUM MILL
DMT PERFORMANCE STANDARDS MONITORING REPORT AND CELL 4A AND
CELL 4B BAT PERFORMANCE STANDARDS MONITORING REPORT
1st Quarter
January through March
2023
State of Utah
Groundwater Discharge Permit No. UGW370004
Prepared By:
~JS£ (~,:-; I ( <
1/ ENERGYFUELS
Energy Fuels Resources (USA) Inc.
225 Union Boulevard, Suite 600
Lakewood, CO. 80228
April 27, 2023
TABLE OF CONTENTS
1.0 INTRODUCTION ......................................................................................................................................... 1
2.0 MEASUREMENTS TAKEN AND MONITORING PERFORMED ....................................................... I
3.0 WEEKLY TAILINGS WASTEWATER POOL ELEV A TION MONITORING .................................. 2
4.0 QUARTERLY SLIMES DRAIN WATER LEVEL MONITORING ...................................................... 3
4.1 GENERAL ...................................................................................................................................................... 3
4.2 RESULTS FOR THE QUARTER ......................................................................................................................... 4
4.3 QUALITY ASSURANCE EVALUATION AND DATA VALIDATION .................................................................... .4
4.4 GRAPHIC COMPARISON TO PREVIOUS YEAR ................................................................................................. 5
5.0 WEEKLY FEEDSTOCK STORAGE AREA INSPECTIONS AND INSPECTIONS OF
FEEDSTOCK MATERIAL STORED OUTSIDE THE FEEDSTOCK STORAGE AREA ................. 5
6.0 TAILINGS CELLS AND POND LINER SYSTEM REPAIRS ................................................................ 5
7.0 DECONTAMINATION PADS .................................................................................................................... 6
7 .1 SUMMARY OF WEEKLY INSPECTIONS ........................................................................................................... 6
7.2 ANNUAL INSPECTION OF EXISTING DECONTAMINATION PAD ....................................................................... 6
7.3 ANNUAL INSPECTION OF NEW DECONTAMINATION PAD .............................................................................. 7
7.4 ANNUAL INSPECTION OF USED OIL AND FUEL TANKS .................................................................................. 7
8.0 AMMONIUM SULFATE PAD ................................................................................................................... 7
9.0 CELL 4A AND CELL 4B BAT PERFORMANCE STANDARDS REPORT ......................................... 7
9. I LDS MONITORING ........................................................................................................................................ 7
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment ........................................................... 7
9.1.2 Measurement of Weekly Fluid Head at the Lowest Point in the Secondary FML ................................... 8
9.1. 3 Measurement of the Volume of Fluids Pumped from the LDS ................................................................. 8
9 .2 MEASUREMENT OF WEEKLY WASTEWATER FLUIDS IN CELLS 4A AND 4B .................................................. 9
9.3 SLIMES DRAIN RECOVERY HEAD MONITORING ........................................................................................... 9
10.0 CELL 1, CELL 2, AND CELL 3 LDS MONITORING ........................................................................... 9
10.1 OPERATIONAL STATUS OF LDS PUMPING AND MONITORING EQUIPMENT ................................................. 10
10.2 MEASUREMENT OF THE VOLUME OF FLUIDS PUMPED FROM THE LDS ....................................................... 10
10.3 MEASUREMENT OF WEEKLY WASTEWATER FLUIDS IN CELLS 1, 2, AND 3 ................................................. 10
10.4 SLIMES DRAIN RECOVERY HEAD MONITORING ......................................................................................... 10
11.0 ANNUAL SLIMES DRAIN RECOVERY HEAD REPORT FOR THE CALENDAR YEAR 2023 .. 10
12.0 QUARTERLY PRECIPITATION DATA ................................................................................................ 11
13.0 SIGNATURE AND CERTIFICATION .................................................................................................... 12
LIST OF TABLES
Table 1 -Summary of Waste Water Pool Elevations (In the Text)
Table 2-New Decontamination Pad Inspection Portal Level (In the Text)
ATTACHMENTS
A Tailings Cell Wastewater Elevations
B Notices Pursuant to Part I.G.3 of the GWDP
C Quarterly Cell 2 Slimes Drain Monitoring Data
D Graph of Cell 2 Slimes Drain Water Levels Over Time
E Cell Liner Repair Reports and Notices
F Cell 4A and Cell 4B Leak Detection System Data for the Quarter and BAT O&M Plan
Tables lA and 1B, Cell 4A and 4B Calculations
G Annual Inspection Forms for Existing and New Decontamination Pads and Quarterly
Inspection Forms for the Ammonium Sulfate Area
H Weekly Feedstock Inspection Form -Feedstock Maps
I Quarterly Precipitation Data
11
WHITE MESA URANIUM MILL
DMT PERFORMANCE STANDARDS MONITORING REPORT AND CELL 4A AND
CELL 4B BAT PERFORMANCE STANDARDS MONITORING REPORTS
FOR THE 1ST QUARTER OF 2023
1.0 INTRODUCTION
This is the routine Discharge Minimization Technology ("DMT") Performance Standards
Monitoring Report for the first quarter of 2023 (the "quarter") prepared by Energy Fuels
Resources (USA) Inc. ("EFRI"), as required under Part 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 (Part
I.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(f) and Parts I.E. 7( d); and
(e));
• Any tailings cell and pond liner system repairs (Part I.E.7 (f) 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 I.E.12 of the
GWDP:
• Leak detection system ("LDS") monitoring for Cell 4A (Part I.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 I.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 Utah
Radioactive Materials License No. UT 19004 79 (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, 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 finsl, 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 (finsl) License Condition Under Part I.D.2 of
10.3 (fmsl) the GWDP (finsl)
Cell 1 5614.56 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 Q 1 2011
Cell 4A 5587.50 -freeboard No Limit No Limit
limit was removed in (5,593.74**) (5,595.50**)
Ql 2011.
Cell 4B 5572.49 5594.60 5597.40
* The Director approved the removal of the Cell 3 freeboard limit and authorized the use ofCell 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 11.1 dated January 2011, 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 1, 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 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 "Permittee 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 0.01
foot.
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) perform at least 1 separate slimes drain
recovery test at each disposal cell in each quarterly period of each calendar year that meets the
requirements of Part I.D.3 (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 and report 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
Pursuant to Parts the I.F.2 of the GWDP, Section 7.1 of the DMT Plan and correspondence from
the Division of Waste Management and Radiation Control ("DWMRC"), dated February 7,
2008, the results of quarterly recovery monitoring of the slimes drain for Cell 2 are to be
recorded and included with the results of quarterly monitoring in the quarterly White Mesa Mill
DMT Performance Standards Monitoring Report and Cell 4A and Cell 4B BAT Performance
Standards Monitoring Reports (the "DMT Reports"). Further, beginning in 2008, quarterly
DMT Reports must include both the current year values and a graphic comparison to the
previous year. The annual slimes drain recovery head report for 2022 was included in Section 11
of the 4th Quarter 2022 DMT Report which was submitted on January 27, 2023. The annual
slimes drain report for 2023 will be submitted with the 4th Quarter 2023 DMT Report which will
be submitted on or before March 1, 2023.
4.2 Results for the Quarter
In accordance with the requirements described above, the quarterly slimes drain recovery head
monitoring data for the quarter, which includes the date and time for the start and end of the
recovery test, the initial water level, and the final depth to stable water level for the quarter, are
included as Attachment C to this Report. All measurements were made from the designated fluid
measuring point. The fluid level measuring point was surveyed by a licensed Utah land surveyor
in Q3 201 7 after the extension of the slimes drain access pipe. The extension of the slimes drain
access pipe was required due to the Cell 2 cover activities.
Cell 2 Phase 1 cover placement/construction commenced in April 2016. The Phase 1 cover
activities include the placement and compaction of approximately 4.5 feet of soil materials.
These cover placement activities have caused an increase in the measured elevations of the Cell
2 slimes drain fluids. The increased elevations are due to excess pressure from surcharge as a
result of cover activities. The increase in elevations was expected and is unavoidable during
cover construction activities. Cover construction activities included the installation of a series of
piezometers across Cell 2. Fluid levels are monitored and recorded in the piezometers. Initially,
fluid measurements in the piezometers were conducted weekly. After the completion of the
Phase 1 activities, the fluid measurements were conducted monthly. The data as well as monthly
contours of the fluid levels are included in Tab C. The data indicate that the increase in fluid
levels in Cell 2 is directly related to the placement of fill and cover construction activities.
The slimes drain pump in Cell 2 is activated and deactivated by a float mechanism and water
level probe system. When the water level reaches the level of the float mechanism the pump is
activated. Pumping then occurs until the solution level reaches the lower probe which turns the
pump off. It is important to note that as a result of the added cover materials and the increase in
solution elevations, additional volumes of solutions have been pumped since the commencement
of cover activities began.
4.3 Quality Assurance Evaluation and Data Validation
EFRI management has evaluated all slimes drain data collected, data collection methods, and all
related calculations required by the GWDP, and have verified the accuracy and reliability of both
the data and calculations reported.
4
As a result of its quality assurance evaluation and data validation review, EFRI has concluded
that the 2009, and 2010 monthly slimes drain tailings fluid elevation measurements, the 2011
monthly (through June) and quarterly (July forward), and the quarterly 2012, 2013, 2014, 2015,
2016, 2017, 2018, 2019, 2020, 2021, 2022, and 2023 slimes drain tailings fluid elevation
measurements to date meet the test performance standards found in Part I.D.3(b)(2) and I.E.7(b)
of the GWDP and can be used for purposes of determining compliance with the requirements of
Part I.D.3(b) of the GWDP.
4.4 Graphic Comparison to Previous Year
A graph showing the final depth to stable water level readings for 2009 through the current 2023
period is included as Attachment D.
5.0 WEEKLY FEEDSTOCK STORAGE AREA INSPECTIONS AND INSPECTIONS
OF FEEDSTOCK MATERIAL STORED OUTSIDE THE FEEDSTOCK STORAGE
AREA
Weekly feedstock storage area inspections were performed by the Mill's Radiation Safety
Department, to confirm that the bulk feedstock materials are stored and maintained within the
defined area described in the GWDP and that all alternate feedstock located outside the defined
feedstock area is maintained in compliance with the requirements of Part I.D.11 of the
GWDP. The results of these inspections are recorded on the Weekly Mill Inspection forms,
which are available at the Mill for inspection.
In the closeout letter for the first quarter 2013 DMT Report, dated July 23, 2013, DWMRC wrote
"EFRI noted standing water in one of the feedstock storage areas. Language in the report referred
to the standing water as a "small amount." The DWMRC requests that in future quarterly reports,
EFRI be more complete in quantifying and describing the location of standing water discovered
in feedstock storage areas." To comply with this request, EFRI has attached the Feedstock
Storage Area Maps ("Feedstock Maps") completed during the weekly Feedstock Storage Area
inspections as Attachment H. When present, the Feedstock Maps will include the areal extent (in
feet) and depth (in inches) of any standing water noted during the weekly inspections. During
the quarter, standing water was noted during the weekly inspections of January 6, January 13,
January 20, (ore pad was covered in snow), March 9, March 15, March 23, and March 29, 2023.
Standing water noted was the result of precipitation which had fallen and accumulated on the ore
storage pad.
6.0 TAILINGS CELLS AND POND LINER SYSTEM REPAIRS
The liner systems at Cells 1, 2, 3, 4A, and 4B were inspected on a daily basis. The results of
those inspections are recorded on the Mill's Daily Inspection Data sheets, which are available at
the Mill for review.
5
7.0 DECONTAMINATIONPADS
7.1 Summary of Weekly Inspections
Part I.E.7 (f) of the GWDP and Section 3.1 of the DMT Plan require that a weekly inspection of
the New Decontamination Pad be performed, and that the vertical inspection portals on the New
Decontamination Pad, which are located between the primary and secondary containments, be
visually observed on a weekly basis as a means of detecting any leakage from the primary
containment into the void between the primary and secondary containments. The BAT
performance standards for the New Decontamination Pad are set out in Part I.D.14 of the
GWDP. Table 2 below indicates the water level measurements in each portal measured during
the quarter.
Table 2 -New Decontamination Pad Inspection Portal Level for the Quarter
Date Portal 1 Portal 2 Portal 3
Liquid Level (ft.) Liquid Level (ft.) Liquid Level (ft.)
01/06/23 0.00 0.00 0.00
01/12/23 0.00 0.00 0.00
01/20/23 0.00 0.00 0.00
01/27/23 0.00 0.00 0.00
02/03/23 0.00 0.00 0.00
02/10/23 0.00 0.00 0.00
02/16/23 0.00 0.00 0.00
02/24/23 0.00 0.00 0.00
03/03/23 0.00 0.00 0.00
03/10/23 0.00 0.00 0.00
03/17/23 0.00 0.00 0.00
03/24/23 0.00 0.00 0.00
03/31/23 0.00 0.00 0.00
As can be seen from the foregoing table, no fluids were observed to be present in any of the
portals during the quarter.
Any soil and debris identified during the weekly inspections was removed from the wash pad of
the New Decontamination Pad, in accordance with part I.D.14 (b) of the GWDP and Section 3.1
(e)(i)(F) of the DMT Plan. No cracks greater than 1/8" were observed during any weekly
inspections.
7.2 Annual Inspection of Existing Decontamination Pad
As required by Part I.F.12 of the Permit, annual inspections of the existing decontamination pad
must be conducted during the second quarter of each year. The documentation for the 2022
annual inspection was reported in the Second Quarter DMT report submitted on July 29, 2022.
The annual inspection for 2023 will be conducted during the second quarter and reported in the
DMT Report due on or before September 1, 2023 .
6
7.3 Annual Inspection of New Decontamination Pad
Annual inspections of the new decontamination pad are conducted during the second quarter of
each year. The documentation for the 2022 annual inspection was reported in the Second
Quarter DMT report submitted on July 29, 2022. The annual inspection for 2023 will be
conducted during the second quarter and reported in the DMT Report due on or before
September 1, 2023.
7.4 Annual Inspection of Used Oil and Fuel Tanks
The used oil tank and storage area and the fuel tanks and storage areas were inspected during the
second quarter 2022 as required by the Spill Prevention, Control and Countermeasures Plan and
the DMT Plan. The annual inspection for 2023 will be conducted during the second quarter and
reported in the DMT Report due on or before September 1, 20223
8.0 AMMONIUM SULFATE PAD
EFRI implemented Phase I of the approved May 7, 2012 Mill Nitrate Corrective Action Plan
("CAP") through the installation of the ammonium sulfate concrete pad. The ammonium sulfate
cover area is required to be inspected quarterly for eight (8) quarters and annually thereafter. The
eighth quarterly inspection was completed in August 2017.
The ammonium sulfate pad annual inspections were completed in during the second quarter 2022
as required by the CAP and DMT plan. Repairs and maintenance, including caulking and
sealing of cracks, were completed following the inspection to prevent additional deterioration.
No repairs were needed on the asphalt portion of the pad.
The annual inspection for 2023 will be conducted during the second quarter and reported in the
DMT Report due on or before September 1, 2023.
9.0 CELL 4A AND CELL 4B BAT PERFORMANCE STANDARDS REPORT
This Section constitutes the routine Cell 4A and Cell 4B BAT Performance Standards
Monitoring Report for the quarter, as required under Part I.F.3 of the GWDP.
9.1 LOS Monitoring
9.1.1 Operational Status of LDS Pumping and Monitoring Equipment
The LDS pumping and monitoring equipment for both of Cell 4A and Cell 48, 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.
7
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 a/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 LDS sump exceed a I-foot level above the lowest point in the lower FML on the Cell
floor (where for purposes of compliance monitoring, this I-foot distance equates to 2.28 feet
[27.36 inches] above the LDS system transducer), as stipulated by Part I.E.8(a)(2) of the GWDP.
During the quarter, the fluid head in the Cell 4A LDS sump did not exceed 14.2 inches above the
LDS 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 LDS sump exceed a I-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 I-foot distance equates to 2.25 feet (27 inches) above the LDS system. During the quarter,
the fluid head in the Cell 4B LDS sump did not exceed 4.72 inches above the LDS transducer.
9.1.3 Measurement of the Volume of Fluids Pumped/ram 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, 122,797 gallons of fluid were pumped from the
Cell 4A LDS for the quarter. Accordingly, the average daily LDS flow volume in Cell 4A did
not exceed 24,160 gallons/day, as stipulated by Part I.E.8(a)(3) of the GWDP.
The daily allowable volume of fluids pumped from the Cell 4A LDS have also been calculated
based on weekly tailings cell fluid measurements using the calculations provided in the Cell 4A
BAT Operations and Maintenance Plan. A letter from the Director dated January 27, 2011 that
approved the use of Cell 4B, and a subsequent letter dated March 15, 2011, stated approval of the
DMT and Cell 4A O&M Plans, which effectively eliminated the former freeboard elevation
requirements for tailings Cell 4A. Pursuant to the receipt of the March 15, 2011 letter, freeboard
limits in Cell 4A were no longer required. However, the weekly wastewater elevations are
8
documented in order to calculate the maximum daily allowable flow volume, in accordance with
the Cell 4A BAT Operations and Maintenance Plan. Based on the wastewater pool elevation
surveys conducted during the quarter, and the maximum head recorded on the FML during the
quarter of 31.95 feet, the allowable flow rate would be approximately 543.88 gallons/acre/day
(21,385 gallons/day for the cell), as determined by Table lA of the Mill's Cell 4A and 4B BAT
Operations and Maintenance Plan, and assuming a liner elevation of 5555.55 feet and
approximately 39.32 acres of liquid area. The average daily flow volume in Cell 4A did not
exceed the calculated flow volume of 21,385 gallons/day. As mentioned above, a total of
122,797 gallons of fluid were pumped from the Cell 4A LDS during the quarter and did not
exceed the calculated maximum allowable daily flow volume. The allowable flow rate
calculation for the quarter for Cell 4A along with Table lA is included in Attachment F of this
report.
Cell 4B
As can be seen from a review of Attachment F, 419 gallons of fluid were pumped from the Cell
4B LDS for the quarter. The average daily LDS flow volume in Cell 4B did not exceed the
26,145 gallons/day limit, as stipulated by Part I.E.12(3) of the GWDP.
Based on the wastewater pool elevation surveys conducted during the quarter, the maximum
head recorded on the FML during the quarter was 14.99 feet. The allowable flow rate would
therefore be approximately 369.90 gallons/acre/day (12,199 gallons/day for the cell), as
determined by Table lB of the Mill's Cell 4A and 4B BAT Operations and Maintenance Plan,
and assuming a liner elevation of 5557.5 feet and approximately 32.98 acres of liquid area. The
average daily flow volume in Cell 4B did not exceed the calculated flow volume of 12,199
gallons/day. As mentioned above, a total of 419 gallons of fluid were pumped from the Cell 4B
LDS during the quarter and did not exceed the calculated maximum allowable daily flow
volume. The allowable flow rate and average daily flow rate calculations for the quarter for Cell
4B are included along with Table lB in Attachment F of this report.
9.2 Measurement of Weekly Wastewater Fluids in Cells 4A and 4B
Weekly fluid elevations for Cells 4A and 4B for the quarter are provided in Attachment A along
with elevations for Cell 1.
9.3 Slimes Drain Recovery Head Monitoring
As the Mill has not initiated pumping of the Cell 4A or Cell 4B slimes drain systems at this time,
monthly recovery head tests and fluid level measurements are not required at this time pursuant
to Parts I.E.8(b) and I.E.12(b) of the GWDP.
10.0 CELL 1, CELL 2, AND CELL 3 LDS 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 for
9
Cells 1, 2, and 3 be included on the DMT inspection forms and that the results of the monitoring
be reported in the quarterly DMT reports. The Cells 1, 2, and 3 LDS monitoring data are
included in Attachment F.
10.1 Operational Status of LDS 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.
Cell 1
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.
Cell 2
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 LDS
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, monthly
recovery head tests and fluid level measurements are not required at this time.
11.0 ANNUAL SLIMES DRAIN RECOVERY HEAD REPORT FOR THE
CALENDAR YEAR 2023
The annual slimes drain recovery head report for Cell 2 for calendar year 2022, as required under
Parts I.D.3 (b) and I.F.11 of the GWDP and Section 8.2 of the DMT Plan was included with the
fourth quarter 2022 DMT report which was submitted January 27, 2023. The annual slimes
drain recovery head report for Cell 2 for calendar year 2023 will be included with the fourth
quarter 2023 DMT report which will be submitted on or before March 1, 2024.
12.0 QUARTERLY PRECIPITATION DATA
Pursuant to a verbal request from DWMRC personnel, EFRI is providing the quarterly
precipitation data in the quarterly DMT reports. The data are collected at the Mill, by the EFRI
Field Staff, using an on-site rain gauge. The data are included as Attachment I to this report.
11
13.0 SIGNATURE AND CERTIFICATION
This document was prepared by Energy Fuels Resources (USA) Inc.
Energy Fuels Resources (USA) Inc.
By:
Scott A. Bakken
Vice President, Regulatory Affairs
12
CERTIFICATION:
I certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Scott A. Bakken
Vice President, Regulatory Affairs
Energy Fuels Resources (USA) Inc.
13
Attachment A
Date Cell 1 Cell 3 1 Cell 4A 2 Cell 4B 3
Freeboard 5615.40 -RML 5594.60 -RML
Limit 5615.50 -GWDP No Limit 5597.40 -GWDP
01/06/23 5613.81 No Longer Required 5586.14 5570.53
01/12/23 5613.83 No Longer Required 5586.26 5570.75
01/20/23 5613.90 No Longer Required 5586.49 5570.90
01/27/23 5614.09 No Longer Required 5586.62 5570.99
02/03/23 5614.23 No Longer Required 5586.72 5571.04
02/10/23 5614.24 No Longer Required 5586.89 5571.05
02/16/23 5614.33 No Longer Required 5587.01 5571.13
02/24/23 5614.43 No Longer Required 5587.20 5571.16
03/03/23 5614.46 No Longer Required 5587.25 5571.17
03/10/23 5614.47 No Longer Required 5587.26 5571.18
03/17 /23 5614.49 No Longer Required 5587.46 5571.66
03/24/23 5614.53 No Longer Required 5587.48 5571.70
03/31/23 5614.56 No Longer Required 5587.50 5572.49
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 f~r Cell 4A is set out in a letter from the Director dated November
20, 2008. EFRl 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 LOS.
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.
Attachment B
This attachment has been deliberately left blank.
Attachment C
QUARTERLY HEAD MEASUREMENT TEST
Location: White Mesa Mill
Slimes Cell# 2
3/8/23
700 41.47
800 40.07
900 39.72
1000 39.32
1100 38.92
1200 38.52
1300 38.00
1400 37.71
1500 37.44
Comments:
3/9/23
34.79
34.71
34.59
34.51
34.40
34.29
34.15
34.06
33.89
Date: 3/8/2023 -3/14/2023
Sampler: Deen Lyman, Tanner Holliday
3/10/23 3/11/23 3/12/23 3/13/23
32.60 31.09 30.68 30.18
32.54 30.16
32.48 30.14
32.43 30.12
32.36 30.10
32.30 30.08
32.24 30.06
32.18 30.04
32.10 30.01
3/14/23
29.73
29.73
29.73
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
t:nerg1 't-ue1s Kesources (U:SA) inc. wn1te Mesa Miil l;ell 2 :stanap1pe t'1ezometers en.)
6/16/2016 6/22/2016 6/30/2016 7/7/2016 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 8/26/2016
11.00 10.86 10.81
13.43 13.02 12.80
12.22 11.75 11.73
15.16 15.02 14.71
18.31 17.95 17.90
16.91 16.34 16.30
14.30 14.16 13.74
23.26 22.90 22.96
23.52 23.24 23.05
27.87 27.80 27.40
25.35 25.28 25.10
25.61 25.58 25.65
21.10 20.69 20.66
22.46 22.21 21.96
20.51 20.54 20.10
19.78 19.59 19.50
22.55 22.31 22.34
18.31 18.10 18.11
10.65 10.55 10.70
16.75 16.59 16.61
14.65 14.46 14.60
12.34 12.18 12.29
9.76 9.77 9.86
9/2/2016 9/9/2016
13.14 13.12
12.42 12.45
16.62 16.62
14.42 13.97
17.83 17.83
16.05 15.99
13.61 12.91
22.81 22.81
22.92 22.89
27.16 26.90
24.73 24.29
25.29 24.81
20.52 20.52
21.79 21.79
20.10 19.99
19.31 19.26
22.21 22.22
18.01 17.95
10.71 10.82
16.53 16.51
14.33 14.46
12.15 12.25
9.79 9.84
nerg, . E Fuels R SA) Inc. White Mesa Mill Cell 2 StandDiDe p· ft
Piezometer 9/16/2016 9/23/2016 9/30/2016 10/7/2016 10/13/2016 10/21/2016 10/28/2016 11/4/2016 11/11/2016 11/18/2016 11/25/2016 12/2/2016
C2-P01 13.08 12.70 12.64 12.66 12.53 12.71 12.59 12.81 12.77 12.91 13.02 12.75
C2-P02 12.30 12.08 11.69 11.67 11.58 11.79 11. 71 11.92 11.90 12.00 12.09 11.88
C2-P03 16.18 15.86 15.89 15.97 15.85 16.00 15.87 16.06 16.02 16.16 16.22 15.95
C2-P04 13.88 13.57 13.55 13.10 12.84 12.91 12.78 12.95 12.91 12.96 13.08 12.88
C2-P05 17.50 17.44 17.25 17.35 17.20 17.30 17.15 17.30 17.22 17.42 17.40 17.20
C2-P06 15.70 18.82 18.72 18.70 18.48 18.56 18.37 18.54 18.44 18.57 18.57 18.32
C2-P07 12.90 15.70 15.76 15.16 14.87 14.91 14.84 14.96 14.95 15.01 15.05 14.90
C2-P08 22.61 22.43 22.50 22.57 22.37 22.50 22.30 22.49 22.38 22.52 22.56 22.28
C2-P09 22.75 22.50 22.25 22.30 22.10 22.29 22.13 22.30 22.19 22.40 22.28 21.87
C2-P10 26.89 26.04 26.05 25.26 25.13 25.82 25.47 25.66 25.62 25.78 25.44 24.70
C2-P11 24.25 23.76 23.78 23.13 22.84 23.21 23.22 23.40 23.41 23.36 23.45 23.08
C2-P12 24.57 27.13 27.02 26.56 26.00 26.77 26.80 27.05 27.05 27.06 26.83 25.94
C2-P13 20.30 20.05 20.14 20.13 19.98 20.13 19.97 20.14 20.08 20.16 20.23 19.91
C2-P14 21.70 23.75 23.60 23.49 23.31 23.58 23.46 23.64 23.50 23.48 23.28 22.78
C2-P15 20.00 22.00 22.06 21.90 21.58 21.79 21.72 21.93 21.75 21.85 21.79 21.50
C2-P16 19.24 18.86 19.01 18.96 18.69 18.78 18.75 18.96 18.14 18.53 18.57 18.31
C2-P17 22.10 21.92 22.08 22.12 21.95 22.11 21.96 22.07 22.00 22.13 22.10 21.71
C2-P18 17.86 17.70 17.90 17.88 17.82 17.97 17.77 17.90 17.75 17.55 17.78 17.44
C2-P19 10.84 10.80 11.08 11.25 11.15 11.20 11.18 14.31 14.16 14.06 14.15 13.93
C2-P20 16.40 16.32 16.45 16.49 16.33 16.46 16.35 19.20 19.19 19.27 19.30 19.00
C2-P21 14.34 14.08 14.43 14.46 14.33 14.51 14.28 14.31 14.29 14.36 14.48 13.98
C2-P22 12.22 12.06 12.46 12.32 12.31 12.44 12.35 12.31 12.28 12.38 12.44 12.02
C2-P23 9.85 9.72 10.04 10.14 10.07 9.93 9.98 10.25 9.79 9.35 9.33 9.20
E Fuels R (USA) Inc. White Mesa Mill Cell 2 Standpipe p· ters (ft.)
Piezometer 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 3/3/2017
C2-P01 13.10 13.00 13.32 13.23 13.32 13.05 13.06 13.72 13.48 13.34 13.42 13.80
C2-P02 12.21 12.08 12.49 12.36 12.41 12.15 12.13 12.85 12.63 12.51 12.64 13.05
C2-P03 16.27 16.15 16.46 16.32 16.41 16.12 16.13 16.80 16.53 16.35 16.40 16.79
C2-P04 13.14 13.01 13.35 13.25 13.10 12.98 12.95 13.50 13.31 13.22 13.37 13.68
C2-P05 17.43 17.30 17.48 17.33 17.51 17.19 17.18 17.72 17.51 17.40 17.41 17.74
C2-P06 18.58 18.39 18.65 18.44 18.50 18.17 18.12 18.76 18.47 18.31 18.43 18.78
C2-P07 15.10 14.97 15.20 15.09 15.03 15.04 14.85 15.27 15.10 15.01 15.13 15.39
C2-P08 22.61 22.33 22.64 22.40 22.47 22.12 22.08 22.82 22.51 22.36 22.50 22.88
C2-P09 21.90 21.80 22.18 21.95 22.09 21.75 21.70 22.29 21.99 21.81 21.85 22.20
C2-P10 25.10 25.10 24.95 24.79 24.78 24.53 24.49 25.01 24.75 24.60 25.12 25.74
C2-P11 23.18 23.27 23.71 23.71 23.56 23.65 23.61 23.64 23.86 23.93 23.95 23.98
C2-P12 26.24 26.61 27.39 27.47 27.32 27.30 27.30 27.79 27.60 27.56 27.72 28.01
C2-P13 20.20 20.02 20.17 20.19 20.16 19.87 19.84 20.55 20.26 20.12 20.24 20.64
C2-P14 22.93 22.82 23.01 22.76 22.89 22.54 22.50 23.09 22.81 22.71 22.80 23.17
C2-P15 21.78 21.70 22.02 21.74 21.84 21.57 21.56 22.10 21.89 21.80 21.93 22.15
C2-P16 18.56 18.48 18.59 18.35 18.42 18.19 18.19 18.69 18.49 18.42 18.55 18.85
C2-P17 22.07 21.88 22.21 21.94 22.05 21.65 21.58 22.20 21.92 21.77 21.82 22.19
C2-P18 17.74 17.55 17.78 17.61 17.58 17.27 17.08 17.76 17.51 17.36 17.46 17.90
C2-P19 14.23 14.08 14.08 13.89 13.99 13.68 13.63 14.21 13.92 13.76 13.80 14.13
C2-P20 19.22 19.10 19.31 19.10 19.15 18.85 18.80 19.35 19.10 18.97 18.94 19.35
C2-P21 19.69 19.47 19.73 18.54 19.11 18.73 18.64 19.37 19.06 18.98 19.03 19.52
C2-P22 18.38 18.06 18.32 18.15 17.66 17.14 17.00 17.65 17.40 17.33 17.42 17.88
C2-P23 9.44 9.37 13.89 14.40 14.29 14.20 13.35 13.75 13.63 13.63 13.80 14.07
ner! y --E Fuels R (USA) Inc. White Mesa Mill Cell 2 Standpipe p· ters (ft.)
Piezometer 3/10/2017 3/17/2017 3/24/2017 3/31/2017 4nI2011 4/14/2017 4/20/2017 4/27/2017 5/2/2017 5/12/2017 5/19/2017 5/25/2017 5/31/2017
C2-P01 13.73 13.75 13.66 13.33 13.68 13.55 13.62 13.37 13.57 13.59 13.60 13.61 13.50
C2-P02 12.97 12.99 12.86 12.58 12.99 12.86 12.96 12.71 12.95 12.98 13.02 13.04 12.95
C2-P03 16.70 16.75 16.66 16.35 16.70 16.61 16.68 16.46 16.69 16.74 16.78 16.79 16.71
C2-P04 13.63 13.61 13.46 13.28 13.69 13.58 13.73 13.50 13.74 13.76 13.79 13.81 13.81
C2-P05 17.67 17.73 17.71 17.44 17.73 17.66 17.70 17.55 17.72 17.81 17.85 17.91 17.76
C2-P06 18.70 18.70 18.62 18.34 18.72 18.62 18.70 18.50 18.73 18.85 18.83 18.85 18.77
C2-P07 15.34 15.34 15.24 15.08 15.40 15.31 15.42 15.27 15.46 15.50 15.52 15.55 15.56
C2-P08 22.74 22.77 22.65 22.29 22.74 22.57 22.67 22.47 22.70 22.80 22.82 22.80 22.72
C2-P09 22.10 22.13 22.10 21.55 22.00 21.90 22.05 21.85 22.05 22.10 22.19 22.20 22.10
C2-P10 25.55 25.08 24.86 24.34 24.88 24.82 24.93 24.76 24.96 25.00 25.02 25.03 25.00
C2-P11 24.24 24.25 24.00 23.66 24.20 24.16 24.25 24.10 24.30 24.99 24.31 24.32 24.38
C2-P12 27.93 27.91 27.46 26.81 27.83 27.86 28.03 27.90 28.15 28.17 28.24 28.24 28.31
C2-P13 20.57 20.58 20.44 20.15 20.88 20.45 20.57 20.35 20.59 20.63 20.67 20.73 20.63
C2-P14 23.10 23.15 23.07 22.73 23.10 23.01 22.91 22.75 22.96 23.00 23.09 23 .15 23.04
C2-P15 22 .20 22.22 22.05 21 .79 22.24 22.15 21.86 21.78 21.98 22.01 22.11 22.13 22.10
C2-P16 18.80 18.84 18.69 18.43 18.81 18.70 21.21 21.28 21.49 21.56 21.65 21.74 21.65
C2-P17 22.09 22.14 22.09 21 .76 22.09 22.00 22.03 21.93 22.05 22.08 22.12 22.14 22.02
C2-P18 17.80 17.85 17.69 17.40 17.83 17.65 17.74 17.47 17.75 17.77 17.80 17.86 17.77
C2-P19 14.00 14.02 13.95 13.61 13.91 13.79 15.62 15.40 15.53 15.53 15.50 15.58 15.37
C2-P20 19.25 19.32 19.28 19.00 19.25 19.60 19.20 19.00 19.20 19.44 22.00 21.96 21.94
C2-P21 19.45 19.51 19.43 19.13 19.56 19.45 19.54 19.30 19.61 19.64 19.70 19.72 19.70
C2-P22 17.83 17.89 17.80 17.55 17.96 17.87 17.98 17.75 18.03 18.10 18.14 18.18 18.12
C2-P23 14.04 14.00 13.86 13.82 14.15 13.96 13.86 13.65 13.82 14.02 14.81 14.83 13.92
cne rgy i-ueIs l"(esources \U;)AJ me. vvmte Iviesa Iv111I \.,ell~ ;:,canap1pe t'Iezometers tn.J
Piezometer 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 11/10/2017 12/6/2017 1/10/2018
C2-P01 13.48 13.48 13.41 13.35 13.43 13.32 13.12 13.07 12.96 13.00 13.08 13.49 13.45
C2-P02 12.95 12.96 12.90 12.88 12.97 12.90 12.74 12.70 12.59 12.58 12.58 12.92 12.77
C2-P03 16.73 16.78 16.74 16.70 16.82 16.75 16.60 16.57 16.27 16.34 16.36 16.73 16.60
C2-P04 13.81 13.82 13.76 13.77 13.86 13.85 13.75 13.74 13.65 13.69 13.70 14.05 13.89
C2-P05 17.80 17.88 17.89 17.88 18.00 17.95 17.87 17.85 17.71 17.67 17.61 17.87 17.75
C2-P06 18.80 18.90 18.83 18.83 18.94 18.90 18.81 18.79 18.77 18.75 18.66 18.93 18.62
C2-P07 15.58 15.60 15.56 15.59 15.66 15.66 15.60 15.60 15.60 15.67 15.73 15.97 15.78
C2-P08 22.77 22.84 22.83 22.80 22.95 22.89 22.80 22.79 22.72 22.56 22.42 22.66 23.50
C2-P09 22.11 22.20 22.22 22.03 22.20 22.21 22.19 22.17 22.17 22.10 22.00 22.15 21.83
C2-P10 25.03 25.07 24.96 24.72 25.01 25.07 25.06 25.04 25.05 25.00 24.90 25.09 24.77
C2-P11 24.37 24.41 24.24 24.00 24.26 24.30 24.32 24.33 24.32 24.25 24.20 24.34 24.24
C2-P12 28.32 28.40 28.03 27.60 28.18 28.37 28.45 28.49 28.51 28.55 28.33 28.70 28.52
C2-P13 20.65 20.66 20.67 20.62 20.72 20.68 20.64 20.56 20.48 20.38 20.26 20.48 20.51
C2-P14 23.07 23.15 23.11 23.01 23.18 23.17 23.12 23.10 23.11 23.04 22.90 23.15 22.92
C2-P15 22.12 22.19 22.07 22.05 22.21 22.12 22.16 22.15 22.16 22.13 21.95 22.27 22.02
C2-P16 21.69 21.75 21.66 21.65 21.79 21.79 21.76 21.75 21.76 21.73 21.63 21.89 21.71
C2-P17 22.03 22.11 22.08 22.05 22.17 22.09 21.94 21.90 21.78 21.63 21.42 21.62 21.32
C2-P18 17.77 17.82 17.78 17.84 17.90 17.83 17.70 17.68 17.55 17.40 17.20 17.38 17.06
C2-P19 15.34 15.40 15.35 15.32 15.40 15.31 15.18 15.14 15.10 15.10 15.08 15.37 15.14
C2-P20 21.93 22.01 21.99 21.94 22.07 22.00 21.85 21.84 21.69 21.55 21.33 21.49 21.23
C2-P21 19.71 19.82 19.79 19.86 19.95 19.90 19.76 19.75 19.65 19.52 19.33 19.56 19.21
C2-P22 18.15 18.23 18.20 18.20 18.34 18.30 18.19 18.18 18.14 18.10 17.99 18.25 17.56
C2-P23 13.92 13.95 13.91 13.92 14.03 13.98 13.97 13.99 13.93 13.91 13.98 14.14 14.21
nen VI . E Fuels R (USA) Inc. White Mesa Mill Cell 2 Standpipe p· ters (ft.)
Piezometer 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 11/5/2018 12/4/2018 1/8/2019 2/1/2019
C2-P01 13.96 14.10 14.28 13.92 13.89 13.63 13.42 13.43 13.29 13.32 13.99 14.45 14.40
C2-P02 13.30 13.45 13.70 13.45 13.54 13.39 13.11 13.19 12.99 12.88 13.44 13.83 13.79
C2-P03 17.13 17.34 17.56 17.35 17.45 17.33 16.53 16.56 16.41 16.26 16.82 17.22 17.08
C2-P04 14.29 14.44 14.76 14.56 14.70 14.62 14.48 14.53 14.41 14.33 14.83 15.10 15.10
C2-P05 18.14 18.33 18.51 18.41 18.60 18.55 18.54 18.68 18.57 18.45 18.83 19.02 18.95
C2-P06 19.06 19.22 19.49 19.36 19.61 19.58 19.58 19.72 19.59 19.45 19.89 20.05 19.94
C2-P07 16.12 16.26 16.53 16.42 16.75 16.60 16.53 16.61 16.51 16.46 16.85 17.01 16.94
C2-P08 22.82 22.97 23.21 23.05 23.32 23.27 23.28 23.49 23.29 23.09 23.54 23.71 23.57
C2-P09 22.29 22.17 22.41 22.39 22.62 22.45 22.56 22.74 22.52 22.39 22.71 22.91 22.78
C2-P10 25.10 25.19 25.30 25.30 25.59 25.44 25.53 25.69 25.44 25.37 25.78 25.50 25.72
C2-P11 24.46 24.54 24.63 24.75 24.98 24.82 24.89 25.00 25.18 24.78 25.01 25.12 25.15
C2-P12 28.76 28.85 28.79 29.06 29.39 28.99 29.12 29.35 29.40 28.98 29.29 29.43 29.36
C2-P13 20.62 20.75 21.02 20.86 21.12 21.08 21.00 21.08 20.85 20.62 21.05 21.27 21.15
C2-P14 23.32 23.52 23.63 23.55 23.81 23.67 23.75 23.90 24.09 23.49 23.94 24.12 23.99
C2-P15 22.41 22.56 22.72 22.67 22.92 22.80 22.81 22.97 23.18 22.55 22.99 23.15 23.01
C2-P16 22.05 22.22 22.37 22.34 22.57 22.45 22.43 22.62 22.38 22.19 22.64 22.78 22.62
C2-P17 21.79 21.95 22.17 22.05 22.25 22.19 22.20 22.21 21.98 21.73 22.10 22.39 23.25
C2-P18 17.52 17.71 18.03 17.93 18.22 18.22 18.14 18.1 9 17.92 17.63 17.99 18.28 18.18
C2-P19 15.61 15.80 16.00 15.79 15.82 15.83 15.82 15.92 15.81 15.77 16.34 16.60 16.50
C2-P20 21.61 21.79 21.98 21.91 22.10 22.08 22.07 22.09 21.85 21.6 21.93 22.19 22.13
C2-P21 19.70 19.88 20.18 20.07 20.31 20.32 20.32 20.37 20.11 19.84 20.24 20.53 20.38
C2-P22 18.43 18.61 18.88 18.78 19.06 19.07 18.94 19.16 18.92 18.71 19.12 19.41 19.31
C2-P23 14.47 14.70 14.92 15.09 15.19 15.29 15.18 15.18 15.11 15.04 15.18 15.45 15.57
E Fuels R ner~v 1 USA} Inc. White Mesa Mill Cell 2 Standpipe p· .. ters (ft.)
Piezometer 3/20/2019 4/4/2019 5/6/2019 6/5/2019 7/3/2019 8/7/2019 9/5/2019 10/2/2019 11/7/2019 12/4/2019 1/3/2020 2/14/2020 3/3/2020
C2-P01 16.78 13.53 12.78 12.50 12.02 11.78 12.01 11.96 12.52 12.77 13.33 13.32 13.52
C2-P02 13.97 13.57 12.71 12.33 11 .88 11 .61 11 .68 11 .53 11.92 12.07 12.56 12.57 12.79
C2-P03 16.51 16.06 15.65 15.64 15.37 15.19 15.16 15.16 15.42 15.47 15.97 15.97 16.17
C2-P04 14.85 14.06 13.36 13.31 13.04 13.00 13.07 13.01 13.39 13.60 13.87 13.85 13.99
C2-P05 18.93 18.61 18.24 18.29 18.21 18.17 18.20 18.15 18.16 18.05 18.44 18.44 18.54
C2-P06 20.17 19.95 19.59 19.52 19.25 19.13 19.13 18.97 18.97 18.93 19.28 19.26 19.36
C2-P07 16.77 16.55 16.41 16.44 16.21 16.11 16.06 15.89 16.02 16.13 16.32 16.33 16.52
C2-P08 23.82 23.70 23.33 23.33 23.17 23.15 23.19 23.09 23.06 22.93 23.25 23.26 23.29
C2-P09 22.95 23.00 22.90 22.91 22.78 22.72 22.74 22.61 22.64 22.24 22.60 22.60 22.40
C2-P10 25.89 25.92 25.90 26.00 25.87 25.89 25.89 25.69 25.70 25.54 25.74 25.75 25.57
C2-P11 25.31 25.30 25.39 25.47 25.35 25.35 25.29 24.96 25.10 25.05 24.95 24.96 25.10
C2-P12 29.54 29.53 29.59 29.67 29.55 29.57 29.56 29.16 29.32 29.06 29.26 29.27 28.90
C2-P13 21.47 21.31 20.98 21.09 21.10 21.09 21.05 20.68 20.70 20.58 20.81 20.81 20.99
C2-P14 25.15 24.14 24.01 24.03 23.94 23.91 23.92 23.76 23.75 23.53 23.91 23.91 23.85
C2-P15 23.43 23.22 23.12 23.19 23.06 23.05 23 .07 22.89 22.88 22.73 23.03 23.04 22.99
C2-P16 22.78 22.76 22.68 22.76 22.61 22.61 22.62 22.44 22.45 22.30 22.59 22.60 22.59
C2-P17 22.71 22.64 22.51 22.56 22.50 22.40 22.36 22.17 22.12 21.91 22.28 22.30 22.38
C2-P18 18.71 18.72 18.72 18.95 18.91 18.88 18.85 18.61 18.59 18.42 18.69 18.71 18.93
C2-P19 16.10 15.96 15.90 16.01 15.92 15.87 15.96 15.94 16.14 16.11 16.57 16.58 16.68
C2-P20 22.55 22.60 22.57 22.71 22.70 22.63 22.59 22.38 22.31 22.06 22.41 22.42 22.50
C2-P21 20.88 20.83 20.84 21.01 20.97 20.92 20.90 20.65 20.61 20.36 20.66 20.66 20.75
C2-P22 19.72 19.65 19.65 19.79 19.68 19.63 19.59 19.36 19.38 19.25 19.55 19.56 19.68
C2-P23 15.91 15.84 15.82 15.89 15.85 15.76 15.67 15.39 15.58 15.64 15.72 15.74 16.18
1:nerg , t-ue1s Kesources (U::SA) me. wmte Mesa MIii \;ell:.! ::stanap1pe l-'1ezometers (n.)
Piezometer 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 1/4/2021 2/4/2021 3/1/2021 4/5/2021
C2-P01 13.65 13.42 13.19 12.65 12.48 12.45 12.61 12.99 13.27 13.75 13.96 14.39 14.07
C2-P02 13.11 13.30 12.96 12.50 12.33 12.24 12.33 12.58 12.71 13.10 13.33 13.83 13.68
C2-P03 16.48 16.39 16.34 16.00 15.88 15.83 15.91 16.11 16.25 16.59 16.78 17.24 17.20
C2-P04 14.21 14.01 14.10 13.78 13.80 13.84 14.00 14.34 14.37 14.70 14.79 15.23 15.15
C2-P05 18.79 18.83 18.94 18.86 18.81 18.81 18.79 18.78 18.82 18.98 19.07 19.36 19.20
C2-P06 19.71 19.65 19.84 19.63 19.59 19.58 19.56 19.67 19.63 19.82 19.85 20.28 20.04
C2-P07 16.80 16.74 16.81 16.60 16.56 16.54 16.56 16.75 16.71 16.95 16.97 17.34 17.24
C2-P08 23.60 23.62 23.82 23.68 23.68 23.70 23.70 23.70 23.61 23.75 23.76 24.17 23.89
C2-P09 22.71 22.69 22.85 22.79 22.77 22.80 22.73 22.75 22.63 22.79 22.70 23.02 22.79
C2-P10 26.02 25.95 26.13 26.02 26.02 26.05 25.97 26.10 25.81 26.04 25.95 26.08 26.08
C2-P11 25.61 25.64 25.75 25.63 25.62 25.60 25.50 25.60 25.24 25.44 25.44 25.43 25.70
C2-P12 29.64 29.71 29.82 29.70 29.65 29.62 29.54 29.74 29.21 29.58 29.58 29.35 29.88
C2-P13 21.39 21.54 21.70 21.57 21.54 21.40 21.43 21.35 21.23 21.41 21.44 21.85 21.68
C2-P14 24.15 24.15 24.35 24.21 24.18 24.20 24.15 24.21 24.11 24.30 24.29 24.56 24.35
C2-P15 23.34 23.31 23.50 23.34 23.32 23.31 23.32 23.43 23.47 23.50 23.49 23.62 23.58
C2-P16 22.86 22.88 23.05 22.90 22.91 22.91 22.95 23.10 22.96 23.20 23.16 23.31 23.24
C2-P17 22.71 22.77 22.96 22.81 22.78 22.73 22.64 22.60 22.55 22.68 22.79 23.21 22.99
C2-P18 19.31 19.50 19.78 19.70 19.64 19.58 19.61 19.55 19.48 19.59 19.67 20.20 20.09
C2-P19 16.93 16.92 17.02 16.84 16.79 16.86 16.94 17.13 17.21 17.44 17.47 17.86 17.54
C2-P20 22.74 22.89 23.06 22.97 22.90 22.82 22.78 22.70 22.66 22.75 22.85 23.26 23.07
C2-P21 21.11 21.24 21.45 21.34 21.29 21.23 21.17 21.15 21.04 21.11 21.17 21.68 21.50
C2-P22 20.02 20.10 20.32 20.19 20.11 20.09 20.06 20.13 20.02 20.18 20.23 20.78 20.55
C2-P23 16.40 16.62 16.74 16.71 16.65 16.58 16.63 16.70 16.70 16.81 16.98 17.18 17.44
Piezometer 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 2/4/2022 3/2/2022 4/6/2022 5/2/2022
C2-P01 14.29 14.04 13.72 13.45 13.45 13.37 13.64 13.87 14.42 14.54 14.79 14.59 14.66
C2-P02 13.97 13.85 13.65 13.38 13.30 13.16 13.31 13.48 14.02 14.05 14.49 14.28 14.43
C2-P03 17.34 17.24 17.10 16.95 16.90 16.78 16.91 17.08 17.48 17.62 17.94 17.78 17.94
C2-P04 15.38 15.28 15.14 14.99 14.98 14.92 15.11 15.17 15.62 15.58 15.90 15.77 15.91
C2-P05 19.49 19.51 19.51 19.48 19.46 19.36 19.40 19.47 19.63 19.75 19.92 19.90 20.05
C2-P06 20.43 20.37 20.37 20.30 20.35 20.23 20.32 20.33 20.59 20.64 20.86 20.75 20.95
C2-P07 17.48 17.40 17.37 17.30 17.33 17.27 17.40 17.43 17.73 17.68 17.90 17.83 17.95
C2-P08 24.29 24.26 24.27 24.26 24.25 24.08 24.11 24.13 24.36 24.39 24.61 24.48 24.68
C2-P09 23.13 23.11 23.12 23.12 23.16 23.23 23.10 23.08 23.11 23.27 23.32 23.27 23.44
C2-P10 26.48 26.34 26.39 26.40 26.47 26.36 26.44 26.30 26.49 26.46 26.57 26.53 26.68
C2-P11 25.90 25.85 25.83 25.82 25.92 25.72 25.83 25.80 26.03 25.84 26.08 26.11 26.23
C2-P12 30.11 30.13 30.13 30.10 30.16 29.98 30.15 30.03 30.41 30.18 30.41 30.48 30.64
C2-P13 22.04 21.99 21.98 21.88 21.88 21.70 21.76 21.75 22.04 22.02 22.25 22.12 22.34
C2-P14 24.86 24.72 24.73 24.70 24.66 24.50 24.57 24.53 24.67 24.80 24.87 24.81 24.91
C2-P15 24.01 23.85 23.89 23.83 23.81 23.64 23.72 23.60 23.83 23.91 24.00 23.94 24.04
C2-P16 23.71 23.56 23.58 23.47 23.46 23.30 23.40 23.31 23.51 23.81 23.66 23.87 23.67
C2-P17 23.52 23.39 23.41 23.29 23.18 23.01 23.02 23.03 23.26 23.67 23.55 23.82 23.59
C2-P18 20.68 20.55 20.61 20.44 20.35 20.17 20.20 20.15 20.47 20.76 20.76 20.99 20.84
C2-P19 18.01 17.82 17.78 17.67 17.64 17.60 17.76 17.78 17.95 18.34 18.15 18.37 18.09
C2-P20 23.56 23.41 23.45 23.33 23.21 23.08 23.05 23.06 23.31 23.65 23.55 23.82 23.59
C2-P21 22.08 21.94 21.98 21.85 21.76 21.58 21.55 21.53 21.69 22.13 22.07 22.32 22.10
C2-P22 21.08 20.92 20.93 20.80 20.76 20.62 20.68 20.63 20.78 21.18 21.15 21.32 21.15
C2-P23 17.58 17.65 17.65 17.55 17.48 17.43 17.44 17.52 17.75 17.68 17.93 17.93 18.04
. .. . .
Piezometer 6/22/2022 7/6/2022 8/4/2022 9/1/2022 10/7/2022 11/8/2022 12/1/2022 1/10/2023 2/2/2023 3/9/2023
C2-P01 14.57 14.34 14.10 13.86 13.96 13.97 14.19 14.69 15.16 15.25
C2-P02 14.56 14.35 14.11 13.87 13.89 13.74 13.90 14.36 14.86 15.01
C2-P03 18.07 17.91 17.75 17.54 17.60 17.50 17.62 18.00 18.44 18.53
C2-P04 16.04 15.85 15.68 15.59 15.63 15.53 15.67 15.97 16.33 16.43
C2-P05 20.23 20.18 20.16 20.05 20.11 20.03 20.04 20.22 20.52 20.54
C2-P06 21 .20 21.07 21 .03 20.96 21.06 20.94 20.96 21 .12 21.52 21 .61
C2-P07 18.15 18.02 17.96 17.95 17.99 17.92 18.00 18.15 18.42 18.44
C2-P08 24.95 24.79 24.76 24.65 24.74 24.56 24.56 24.72 25.14 25.15
C2-P09 23.56 23.56 23.59 23.57 23.57 23.55 23.50 23.55 23.87 23.95
C2-P10 26.90 26.81 26.81 25.87 25.92 25.91 25.92 25.95 26.25 26.33
C2-P11 26.38 26.32 26.35 26.34 26.17 26.15 26.20 26.32 26.45 26.58
C2-P12 30.89 30.85 30.86 30.86 30.68 30.76 30.80 30.93 31.09 31 .24
C2-P13 22.56 22.40 22.32 22.24 22.24 22.05 22.07 22.26 22.62 22 .69
C2-P14 25.16 25.07 25.04 24.96 24.95 24.85 24.81 24.96 25.32 25.38
C2-P15 24.27 24.17 24.14 24.07 24.07 23.98 23.97 24.16 24.41 24.43
C2-P16 23.90 23.78 23.75 23.69 23.72 23.62 23.62 23.78 24.03 24.05
C2-P17 23.91 23.82 23.74 23.63 23.64 23.33 23.29 23.56 24.02 24.08
C2-P18 21.25 21.12 21 .02 20.86 20.85 20.53 20.49 20.72 21.15 21 .25
C2-P19 18.30 18.17 18.09 17.98 18.09 18.03 18.08 18.23 18.61 18.62
C2-P20 23.87 23.80 23.73 23.61 23.59 23.34 23.31 23.71 24.00 24.06
C2-P21 22.52 22.41 22.30 22.13 22.14 21.80 21.78 22.03 22.47 22.56
C2-P22 21 .53 21.40 21.31 21.18 21 .20 20.95 20.92 21 .15 21.55 21.61
C2-P23 18.26 18.22 18.13 18.00 17.93 17.76 17.82 18.07 18.14 18.23
t:nergy i-ue1s Kesources (U~A) me. wnite Mesa MIii (.;ell 2 ~tana pipe Plezometers water ~unace Elevation (tt amsl)
Piezometer 6/16/2016 6/22/2016 6/30/2016 1n12016 7/14/2016 7/22/2016 7/28/2016 8/5/2016 8/11/2016 8/19/2016 8/26/2016 9/2/2016 9/9/2016
C2-P01 5611.05 5611.17 5611.29 5611.34 5611 .29 5611.38 5611 .50 5611.57 5611.51 5611 .65 5611.70 5611.94 5611.96
C2-P02 5610.90 5610.94 5610.92 5611 .09 5611 .15 5611 .34 5611.44 5611 .52 5611.45 5611 .86 5612.08 5612.46 5612.43
C2-P03 5610.04 5610.26 5610.36 5610.61 5610.56 5610.55 5610.72 5611 .02 5611 .05 5611 .52 5611.54 5611 .54 5611 .54
C2-P04 5610.84 5610.93 5610.97 5611.09 5611 .05 5611.13 5611 .51 5611.61 5611.59 5611 .73 5612.04 5612.33 5612.78
C2-P05 5606.50 5606.59 5606.65 5606.74 5606.81 5606.81 5606.90 5607.17 5607.23 5607.59 5607.64 5607.71 5607.71
C2-P06 5606.51 5606.58 5606.71 5606.74 5606.77 5606.91 5607.07 5607.16 5607.12 5607.69 5607.73 5607.98 5608.04
C2-P07 5606.53 5606.67 5606.65 5606.72 5606.71 5606.74 5607.44 5607.51 5607.44 5607.58 5608.00 5608.13 5608.83
C2-P08 5603.71 5603.84 5603.86 5603.92 5603.94 5603.95 5604.10 5604.21 5604.07 5604.43 5604.37 5604.52 5604.52
C2-P09 5599.31 5600.80 5600.70 5600.74 5600.65 5600.85 5600.96 5601.06 5600.97 5601 .25 5601.44 5601.57 5601.60
C2-P10 5598.44 5599.00 5598.31 5598.13 5597.97 5597.85 5598.15 5598.19 5598.01 5598.08 5598.48 5598.72 5598.98
C2-P11 5599.55 5599.81 5599.48 5599.47 5599.35 5599.34 5599.91 5599.95 5599.87 5599.94 5600.12 5600.49 5600.93
C2-P12 5595.99 5597.39 5596.50 5596.34 5596.14 5596.05 5596.22 5596.63 5596.50 5596.53 5596.46 5596.82 5597.30
C2-P13 5603.71 5603.73 5603.84 5604.01 5604.08 5604.09 5604.26 5604.42 5604.46 5604.87 5604.90 5605.04 5605.04
C2-P14 5601.28 5601.57 5601 .53 5601.48 5601 .38 5601.53 5601.73 5601.75 5601.67 5601.92 5602.17 5602.34 5602.34
C2-P15 5601.80 5602.00 5601.97 5602.01 5601 .96 5602.09 5602.37 5602.42 5602.65 5602.62 5603.06 5603.06 5603.17
C2-P16 5602.27 5602.50 5602.45 5602.49 5602.41 5602.49 5602.71 5602.80 5602.73 5602.92 5603.01 5603.20 5603.25
C2-P17 5606.06 5606.20 5606.17 5606.32 5606.30 5606.32 5606.47 5606.60 5606.52 5606.76 5606.73 5606.86 5606.85
C2-P18 5606.20 5606.25 5606.28 5606.38 5606.33 5606.32 5606.52 5606.64 5606.59 5606.80 5606.79 5606.89 5606.95
C2-P19 5609.06 5609.09 5609.06 5609.02 5608.87 5608.80 5608.87 5608.87 5608.72 5608.82 5608.67 5608.66 5608.55
C2-P20 5609.43 5609.48 5609.56 5609.61 5609.60 5609.61 5609.76 5609.86 5609.83 5609.99 5609.97 5610.05 5610.07
C2-P21 5610.72 5610.80 5610.81 5610.92 5610.86 5610.83 5611.00 5611 .10 5611.03 5611.22 5611.08 5611.35 5611 .22
C2-P22 5611.77 5611 .85 5611 .77 5611 .89 5611.79 5611.71 5611 .87 5611 .96 5611.85 5612.01 5611 .90 5612.04 5611.94
C2-P23 5612.29 5612.46 5612.48 5612.57 5612.49 5612.37 5612.44 5612.50 5612.46 5612.45 5612.36 5612.43 5612.38
..
Piezometer 9/16/2016 9/23/2016 9/30/2016 1onI2016 10/13/2016 10/21/2016 10/28/2016 11/4/2016 11/11/2016 11/18/2016 11/25/2016 12/2/2016
C2-P01 5612.00 5612.38 5612.44 5612.42 5612.55 5612.37 5612.49 5612.27 5612.31 5612.17 5612.06 5612.33
C2-P02 5612.58 5612.80 5613.19 5613.21 5613.30 5613.09 5613.17 5612.96 5612.98 5612.88 5612.79 5613.00
C2-P03 5611.98 5612.30 5612.27 5612.19 5612.31 5612.16 5612.29 5612.10 5612.14 5612.00 5611.94 5612.21
C2-P04 5612.87 5613.18 5613.20 5613.65 5613.91 5613.84 5613.97 5613.80 5613.84 5613.79 5613.67 5613.87
C2-P05 5608.04 5608.10 5608.29 5608.19 5608.34 5608.24 5608.39 5608.24 5608.32 5608.12 5608.14 5608.34
C2-P06 5608.33 5608.51 5608.61 5608.63 5608.85 5608.77 5608.96 5608.79 5608.89 5608.76 5608.76 5609.01
C2-P07 5608.84 5609.22 5609.16 5609.76 5610.05 5610.01 5610.08 5609.96 5609.97 5609.91 5609.87 5610.02
C2-P08 5604.72 5604.90 5604.83 5604.76 5604.96 5604.83 5605.03 5604.84 5604.95 5604.81 5604.77 5605.05
C2-P09 5601.74 5601.99 5602.24 5602.19 5602.39 5602.20 5602.36 5602.19 5602.30 5602.09 5602.21 5602.62
C2-P10 5598.99 5599.84 5599.83 5600.62 5600.75 5600.06 5600.41 5600.22 5600.26 5600.10 5600.44 5601.18
C2-P11 5600.97 5601.46 5601.44 5602.09 5602.38 5602.01 5602.00 5601.82 5601.81 5601.86 5601.77 5602.14
C2-P12 5597.54 5598.26 5598.37 5598.83 5599.39 5598.62 5598.59 5598.34 5598.34 5598.33 5598.56 5599.45
C2-P13 5605.26 5605.51 5605.42 5605.43 5605.58 5605.43 5605.59 5605.42 5605.48 5605.40 5605.33 5605.65
C2-P14 5602.43 5602.74 5602.89 5603.00 5603.18 5602.91 5603.03 5602.85 5602.99 5603.01 5603.21 5603.71
C2-P15 5603.16 5603.51 5603.45 5603.61 5603.93 5603.72 5603.79 5603.58 5603.76 5603.66 5603.72 5604.01
C2-P16 5603.27 5603.65 5603.50 5603.55 5603.82 5603.73 5603.76 5603.55 5604.37 5603.98 5603.94 5604.20
C2-P17 5606.97 5607.15 5606.99 5606.95 5607.12 5606.96 5607.11 5607.00 5607.07 5606.94 5606.97 5607.36
C2-P18 5607.04 5607.20 5607.00 5607.02 5607.08 5606.93 5607.13 5607.00 5607.15 5607.35 5607.12 5607.46
C2-P19 5608.53 5608.57 5608.29 5608.12 5608.22 5608.17 5608.19 5607.92 5608.07 5608.17 5608.08 5608.30
C2-P20 5610.18 5610.26 5610.13 5610.09 5610.25 5610.12 5610.23 5610.23 5610.24 5610.16 5610.13 5610.43
C2-P21 5611.34 5611.60 5611.25 5611.22 5611.35 5611.17 5611.40 5611.37 5611.39 5611.32 5611.20 5611.70
C2-P22 5611.97 5612.13 5611.73 5611.87 5611.88 5611.75 5611.84 5611.88 5611.91 5611.81 5611.75 5612.17
C2-P23 5612.37 5612.50 5612.18 5612.08 5612.15 5612.29 5612.24 5611.97 5612.43 5612.87 5612.89 5613.02
E Fuels R (USA) Inc. White Mesa Mill Cell 2 Standpipe p· ters Water Surface Elevation {ft 11
L
Piezometer 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 3/3/2017
C2-P01 5611.98 5612.08 5611.76 5611.85 5611.76 5612.03 5612.02 5611.36 5611.60 5611.74 5611.66 5611.28
C2-P02 5612.67 5612.80 5612.39 5612.52 5612.47 5612.73 5612.75 5612.03 5612.25 5612.37 5612.24 5611.83
C2-P03 5611.89 5612.01 5611.70 5611.84 5611.75 5612.04 5612.03 5611.36 5611.63 5611.81 5611.76 5611.37
C2-P04 5613.61 5613.74 5613.40 5613.50 5613.65 5613.77 5613.80 5613.25 5613.44 5613.53 5613.38 5613.07
C2-P05 5608.11 5608.24 5608.06 5608.21 5608.03 5608.35 5608.36 5607.82 5608.03 5608.14 5608.13 5607.80
C2-P06 5608.75 5608.94 5608.68 5608.89 5608.83 5609.16 5609.21 5608.57 5608.86 5609.02 5608.90 5608.55
C2-P07 5609.82 5609.95 5609.72 5609.83 5609.89 5609.88 5610.07 5609.65 5609.82 5609.91 5609.79 5609.53
C2-P08 5604.72 5605.00 5604.69 5604.93 5604.86 5605.21 5605.25 5604.51 5604.82 5604.97 5604.83 5604.45
C2-P09 5602.59 5602.69 5602.31 5602.54 5602.40 5602.74 5602.79 5602.20 5602.50 5602.68 5602.64 5602.29
C2-P10 5600.78 5600.78 5600.93 5601.09 5601.10 5601.35 5601.39 5600.87 5601.13 5601.28 5600.76 5600.14
C2-P11 5602.04 5601.95 5601.51 5601.51 5601.66 5601.57 5601.61 5601.58 5601.36 5601.29 5601.27 5601.24
C2-P12 5599.15 5598.78 5598.00 5597.92 5598.07 5598.09 5598.09 5597.60 5597.79 5597.83 5597.67 5597.38
C2-P13 5605.36 5605.54 5605.39 5605.37 5605.40 5605.69 5605.72 5605.01 5605.30 5605.44 5605.32 5604.92
C2-P14 5603.56 5603.67 5603.48 5603.73 5603.60 5603.95 5603.99 5603.40 5603.68 5603.78 5603.69 5603.32
C2-P15 5603.73 5603.81 5603.49 5603.77 5603.67 5603.94 5603.95 5603.41 5603.62 5603.71 5603.58 5603.36
C2-P16 5603.95 5604.03 5603.92 5604.16 5604.09 5604.32 5604.32 5603.82 5604.02 5604.09 5603.96 5603.66
C2-P17 5607.00 5607.19 5606.86 5607.13 5607.02 5607.42 5607.49 5606.87 5607.15 5607.30 5607.25 5606.88
C2-P18 5607.16 5607.35 5607.12 5607.29 5607.32 5607.63 5607.82 5607.14 5607.39 5607.54 5607.44 5607.00
C2-P19 5608.00 5608.15 5608.15 5608.34 5608.24 5608.55 5608.60 5608.02 5608.31 5608.47 5608.43 5608.10
C2-P20 5610.21 5610.33 5610.12 5610.33 5610.28 5610.58 5610.63 5610.08 5610.33 5610.46 5610.49 5610.08
C2-P21 5611.25 5611.47 5611.21 5612.40 5611.83 5612.21 5612.30 5611.57 5611.88 5611.96 5611.91 5611.42
C2-P22 5612.01 5612.33 5612.07 5612.24 5612.73 5613.25 5613.39 5612.74 5612.99 5613.06 5612.97 5612.51
C2-P23 5612.78 5612.85 5613.70 5613.19 5613.30 5613.39 5614.24 5613.84 5613.96 5613.96 5613.79 5613.52
. . -------, --------·-· ------
Piezometer 3/10/2017 3/17/2017 3/24/2017 3/31/2017 4nI2011 4/14/2017
C2-P01 5611 .35 5611.33 5611 .42 5611 .75 5611 .40 5611 .53
C2-P02 5611.91 5611.89 5612.02 5612.30 5611 .89 5612.02
C2-P03 5611.46 5611 .41 5611 .50 5611.81 5611.46 5611.55
C2-P04 5613.12 5613.14 5613.29 5613.47 5613.06 5613.17
C2-P05 5607.87 5607.81 5607.83 5608.10 5607.81 5607.88
C2-P06 5608.63 5608.63 5608.71 5608.99 5608.61 5608.71
C2-P07 5609.58 5609.58 5609.68 5609.84 5609.52 5609.61
C2-P08 5604.59 5604.56 5604.68 5605.04 5604.59 5604.76
C2-P09 5602.39 5602.36 5602.39 5602.94 5602.49 5602.59
C2-P10 5600.33 5600.80 5601 .02 5601.54 5601.00 5601 .06
C2-P11 5600.98 5600.97 5601 .22 5601 .56 5601 .02 5601 .06
C2-P12 5597.46 5597.48 5597.93 5598.58 5597.56 5597.53
C2-P13 5604.99 5604.98 5605.12 5605.41 5604.68 5605.11
C2-P14 5603.39 5603.34 5603.42 5603.76 5603.39 5603.48
C2-P15 5603.31 5603.29 5603.46 5603.72 5603.27 5603.36
C2-P16 5603.71 5603.67 5603.82 5604.08 5603.70 5603.81
C2-P17 5606.98 5606.93 5606.98 5607.31 5606.98 5607.07
C2-P18 5607.10 5607.05 5607.21 5607.50 5607.07 5607.25
C2-P19 5608.23 5608.21 5608.28 5608.62 5608.32 5608.44
C2-P20 5610.18 5610.11 5610.15 5610.43 5610.18 5609.83
C2-P21 5611.49 5611.43 5611 .51 5611 .81 5611.38 5611 .49
C2-P22 5612.56 5612.50 5612.59 5612.84 5612.43 5612.52
C2-P23 5613.55 5613.59 5613.73 5613.77 5613.44 5613.63
.. ---·.--..------------------------,------,
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.
5/25/2017
5611.47
5611 .84
5611.37
5612.94
5607.63
5608.48
5609.37
5604.53
5602.29
5600.85
5600.90
5597.15
5604.83
5603.34
5603.38
5603.80
5606.93
5607.04
5608.84
5610.08
5611 .22
5612.21
5612.76
5/31/2017
5611 .58
5611 .93
5611.45
5612.94
5607.78
5608.56
5609.36
5604.61
5602.39
5600.88
5600.84
5597.08
5604.93
5603.45
5603.41
5603.89
5607.05
5607.13
5609.05
5610.10
5611 .24
5612.27
5613.67
Enerav Fuels Resources (USA Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation (ft amsl)
Piezometer 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 11/10/2017 12/6/2017 1/10/2018
C2-P01 5611 .60 5611.60 5611 .67 5611 .73 5611 .65 5611 .76 5611 .96 5612.01 5612.12 5612.08 5612.00 5611.59 5611 .63
C2-P02 5611 .93 5611.92 5611.98 5612.00 5611 .91 5611.98 5612.14 5612.18 5612.29 5612.30 5612.30 5611 .96 5612.11
C2-P03 5611.43 5611.38 5611.42 5611.46 5611 .34 5611.41 5611.56 5611.59 5611.89 5611.82 5611 .80 5611.43 5611 .56
C2-P04 5612.94 5612.93 5612.99 5612.98 5612.89 5612.90 5613.00 5613.01 5613.10 5613.06 5613.05 5612.70 5612.86
C2-P05 5607.74 5607.66 5607.65 5607.66 5607.54 5607.59 5607.67 5607.69 5607.83 5607.87 5607.93 5607.67 5607.79
C2-P06 5608.53 5608.43 5608.50 5608.50 5608.39 5608.43 5608.52 5608.54 5608.56 5608.58 5608.67 5608.40 5608.71
C2-P07 5609.34 5609.32 5609.36 5609.33 5609.26 5609.26 5609.32 5609.32 5609.32 5609.25 5609.19 5608.95 5609.14
C2-P08 5604.56 5604.49 5604.50 5604.53 5604.38 5604.44 5604.53 5604.54 5604.61 5604.77 5604.91 5604.67 5603.83
C2-P09 5602.38 5602.29 5602.27 5602.46 5602.29 5602.28 5602.30 5602.32 5602.32 5602.39 5602.49 5602.34 5602.66
C2-P10 5600.85 5600.81 5600.92 5601.16 5600.87 5600.81 5600.82 5600.84 5600.83 5600.88 5600.98 5600.79 5601 .11
C2-P11 5600.85 5600.81 5600.98 5601.22 5600.96 5600.92 5600.90 5600.89 5600.90 5600.97 5601.02 5600.88 5600.98
C2-P12 5597.07 5596.99 5597.36 5597.79 5597.21 5597.02 5596.94 5596.90 5596.88 5596.84 5597.06 5596.69 5596.87
C2-P13 5604.91 5604.90 5604.89 5604.94 5604.84 5604.88 5604.92 5605.00 5605.08 5605.18 5605.30 5605.08 5605.05
C2-P14 5603.42 5603.34 5603.38 5603.48 5603.31 5603.32 5603.37 5603.39 5603.38 5603.45 5603.59 5603.34 5603.57
C2-P15 5603.39 5603.32 5603.44 5603.46 5603.30 5603.39 5603.35 5603.36 5603.35 5603.38 5603.56 5603.24 5603.49
C2-P16 5603.85 5603.79 5603.88 5603.89 5603.75 5603.75 5603.78 5603.79 5603.78 5603.81 5603.91 5603.65 5603.83
C2-P17 5607.04 5606.96 5606.99 5607.02 5606.90 5606.98 5607.13 5607.17 5607.29 5607.44 5607.65 5607.45 5607.75
C2-P18 5607.13 5607.08 5607.12 5607.06 5607.00 5607.07 5607.20 5607.22 5607.35 5607.50 5607.70 5607.52 5607.84
C2-P19 5609.08 5609.02 5609.07 5609.10 5609.02 5609.11 5609.24 5609.28 5609.32 5609.32 5609.34 5609.05 5609.28
C2-P20 5610.11 5610.03 5610.05 5610.10 5609.97 5610.04 5610.19 5610.20 5610.35 5610.49 5610.71 5610.55 5610.81
C2-P21 5611.23 5611.12 5611 .15 5611 .08 5610.99 5611.04 5611 .18 5611 .19 5611.29 5611.42 5611.61 5611.38 5611 .73
C2-P22 5612.24 5612.16 5612.19 5612.19 5612.05 5612.09 5612.20 5612.21 5612.25 5612.29 5612.40 5612.14 5612.83
C2-P23 5613.67 5613.64 5613.68 5613.67 5613.56 5613.61 5613.62 5613.60 5613.66 5613.68 5613.61 5613.45 5613.38
--.
Piezometer 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 11/5/2018 12/4/2018 1/8/2019 2/1/2019
C2-P01 5611 .12 5610.98 5610.80 5611 .16 5611 .19 5611.45 5611.66 5611 .65 5611 .79 5611.76 5611 .09 5610.63 5610.68
C2-P02 5611 .58 5611.43 5611 .18 5611.43 5611 .34 5611.49 5611.77 5611 .69 5611 .89 5612.00 5611.44 5611 .05 5611 .09
C2-P03 5611 .03 5610.82 5610.60 5610.81 5610.71 5610.83 5610.87 5610.84 5610.99 5611 .14 5610.58 5610.18 5610.32
C2-P04 5612.46 5612.31 5611 .99 5612.19 5612.05 5612.13 5612.27 5612.22 5612.34 5612.42 5611 .92 5611.65 5611 .65
C2-P05 5607.40 5607.21 5607.03 5607.13 5606.94 5606.99 5607.00 5606.86 5606.97 5607.09 5606.71 5606.52 5606.59
C2-P06 5608.27 5608.11 5607.84 5607.97 5607.72 5607.75 5607.75 5607.61 5607.74 5607.88 5607.44 5607.28 5607.39
C2-P07 5608.80 5608.66 5608.39 5608.50 5608.17 5608.32 5608.39 5608.31 5608.41 5608.46 5608.07 5607.91 5607.98
C2-P08 5604.51 5604.36 5604.12 5604.28 5604.01 5604.06 5604.05 5603.84 5604.04 5604.24 5603.79 5603.62 5603.76
C2-P09 5602.20 5602.32 5602.08 5602.10 5601 .87 5602.04 5601.93 5601 .75 5601.97 5602.10 5601 .78 5601.58 5601 .71
C2-P10 5600.78 5600.69 5600.58 5600.58 5600.29 5600.44 5600.35 5600.19 5600.44 5600.51 5600.10 5600.38 5600.16
C2-P11 5600.76 5600.68 5600.59 5600.47 5600.24 5600.40 5600.33 5600.22 5600.04 5600.44 5600.21 5600.10 5600.07
C2-P12 5596.63 5596.54 5596.60 5596.33 5596.00 5596.40 5596.27 5596.04 5595.99 5596.41 5596.10 5595.96 5596.03
C2-P13 5604.94 5604.81 5604.54 5604.70 5604.44 5604.48 5604.56 5604.48 5604.71 5604.94 5604.51 5604.29 5604.41
C2-P14 5603.17 5602.97 5602.86 5602.94 5602.68 5602.82 5602.74 5602.59 5602.40 5603.00 5602.55 5602.37 5602.50
C2-P15 5603.10 5602.95 5602.79 5602.84 5602.59 5602.71 5602.70 5602.54 5602.33 5602.96 5602.52 5602.36 5602.50
C2-P16 5603.49 5603.32 5603.17 5603.20 5602.97 5603.09 5603.11 5602.92 5603.16 5603.35 5602.90 5602.76 5602.92
C2-P17 5607.28 5607.12 5606.90 5607.02 5606.82 5606.88 5606.87 5606.86 5607.09 5607.34 5606.97 5606.68 5605.82
C2-P18 5607.38 5607.19 5606.87 5606.97 5606.68 5606.68 5606.76 5606.71 5606.98 5607.27 5606.91 5606.62 5606.72
C2-P19 5608.81 5608.62 5608.42 5608.63 5608.60 5608.59 5608.60 5608.50 5608.61 5608.65 5608.08 5607.82 5607.92
C2-P20 5610.43 5610.25 5610.06 5610.13 5609.94 5609.96 5609.97 5609.95 5610.19 5610.44 5610.11 5609.85 5609.91
C2-P21 5611 .24 5611 .06 5610.76 5610.87 5610.63 5610.62 5610.62 5610.57 5610.83 5611 .10 5610.70 5610.41 5610.56
C2-P22 5611 .96 5611 .78 5611 .51 5611 .61 5611.33 5611 .32 5611.45 5611 .23 5611.47 5611 .68 5611 .27 5610.98 5611 .08
C2-P23 5613.12 5612.89 5612.67 5612.50 5612.40 5612.30 5612.41 5612.41 5612.48 5612.55 5612.41 5612.14 5612.02
..
Piezometer 3/20/2019 4/4/2019 5/6/2019 6/5/2019 7/3/2019 Sn/2019 9/5/2019 10/2/2019 11n12019 12/4/2019 1/3/2020 2/14/2020 3/3/2020
C2-P01 5608.30 5611.55 5612.30 5612.58 5613.06 5613.30 5613.07 5613.12 5612.56 5612.31 5611.75 5611.76 5611.56
C2-P02 5610.91 5611.31 5612.17 5612.55 5613.00 5613.27 5613.20 5613.35 5612.96 5612.81 5612.32 5612.31 5612.09
C2-P03 5610.89 5611.34 5611.75 5611.76 5612.03 5612.21 5612.24 5612.24 5611.98 5611.93 5611.43 5611.43 5611.23
C2-P04 5611.90 5612.69 5613.39 5613.44 5613.71 5613.75 5613.68 5613.74 5613.36 5613.15 5612.88 5612.90 5612.76
C2-P05 5606.61 5606.93 5607.30 5607.25 5607.33 5607.37 5607.34 5607.39 5607.38 5607.49 5607.10 5607.10 5607.00
C2-P06 5607.16 5607.38 5607.74 5607.81 5608.08 5608.20 5608.20 5608.36 5608.36 5608.40 5608.05 5608.07 5607.97
C2-P07 5608.15 5608.37 5608.51 5608.48 5608.71 5608.81 5608.86 5609.03 5608.90 5608.79 5608.60 5608.59 5608.40
C2-P08 5603.51 5603.63 5604.00 5604.00 5604.16 5604.18 5604.14 5604.24 5604.27 5604.40 5604.08 5604.07 5604.04
C2-P09 5601.54 5601.49 5601.59 5601.58 5601.71 5601.77 5601.75 5601.88 5601.85 5602.25 5601.89 5601.89 5602.09
C2-P10 5599.99 5599.96 5599.98 5599.88 5600.01 5599.99 5599.99 5600.19 5600.18 5600.34 5600.14 5600.13 5600.31
C2-P11 5599.91 5599.92 5599.83 5599.75 5599.87 5599.87 5599.93 5600.26 5600.12 5600.17 5600.27 5600.26 5600.12
C2-P12 5595.85 5595.86 5595.80 5595.72 5595.84 5595.82 5595.83 5596.23 5596.07 5596.33 5596.13 5596.12 5596.49
C2-P13 5604.09 5604.25 5604.58 5604.47 5604.46 5604.47 5604.51 5604.88 5604.86 5604.98 5604.75 5604.75 5604.57
C2-P14 5601.34 5602.35 5602.48 5602.46 5602.55 5602.58 5602.57 5602.73 5602.74 5602.96 5602.58 5602.58 5602.64
C2-P15 5602.08 5602.29 5602.39 5602.32 5602.45 5602.46 5602.44 5602.62 5602.63 5602.78 5602.48 5602.47 5602.52
C2-P16 5602.76 5602.78 5602.86 5602.78 5602.93 5602.93 5602.92 5603.10 5603.09 5603.24 5602.95 5602.94 5602.95
C2-P17 5606.36 5606.43 5606.56 5606.51 5606.57 5606.67 5606.71 5606.90 5606.95 5607.16 5606.79 5606.77 5606.69
C2-P18 5606.19 5606.18 5606.18 5605.95 5605.99 5606.02 5606.05 5606.29 5606.31 5606.48 5606.21 5606.19 5605.97
C2-P19 5608.32 5608.46 5608.52 5608.41 5608.50 5608.55 5608.46 5608.48 5608.28 5608.31 5607.85 5607.84 5607.74
C2-P20 5609.49 5609.44 5609.47 5609.33 5609.34 5609.41 5609.45 5609.66 5609.73 5609.98 5609.63 5609.62 5609.54
C2-P21 5610.06 5610.11 5610.10 5609.93 5609.97 5610.02 5610.04 5610.29 5610.33 5610.58 5610.28 5610.28 5610.19
C2-P22 5610.67 5610.74 5610.74 5610.60 5610.71 5610.76 5610.80 5611.03 5611.01 5611.14 5610.84 5610.83 5610.71
C2-P23 5611.68 5611.75 5611.77 5611.70 5611.74 5611.83 5611.92 5612.20 5612.01 5611.95 5611.87 5611.85 5611.41
Piezometer 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 1/4/2021 2/4/2021 3/1/2021 4/5/2021
C2-P01 5611.43 5611.66 5611.89 5612.43 5612.60 5612.63 5612.47 5612.09 5611.81 5611.33 5611.12 5610.69 5611.01
C2-P02 5611.77 5611.58 5611.92 5612.38 5612.55 5612.64 5612.55 5612.30 5612.17 5611.78 5611.55 5611.05 5611.20
C2-P03 5610.92 5611.01 5611.06 5611.40 5611.52 5611.57 5611.49 5611.29 5611.15 5610.81 5610.62 5610.16 5610.20
C2-P04 5612.54 5612.74 5612.65 5612.97 5612.95 5612.91 5612.75 5612.41 5612.38 5612.05 5611.96 5611.52 5611.60
C2-P05 5606.75 5606.71 5606.60 5606.68 5606.73 5606.73 5606.75 5606.76 5606.72 5606.56 5606.47 5606.18 5606.34
C2-P06 5607.62 5607.68 5607.49 5607.70 5607.74 5607.75 5607.77 5607.66 5607.70 5607.51 5607.48 5607.05 5607.29
C2-P07 5608.12 5608.18 5608.11 5608.32 5608.36 5608.38 5608.36 5608.17 5608.21 5607.97 5607.95 5607.58 5607.68
C2-P08 5603.73 5603.71 5603.51 5603.65 5603.65 5603.63 5603.63 5603.63 5603.72 5603.58 5603.57 5603.16 5603.44
C2-P09 5601.78 5601.80 5601.64 5601.70 5601.72 5601.69 5601.76 5601.74 5601.86 5601.70 5601.79 5601.47 5601.70
C2-P10 5599.86 5599.93 5599.75 5599.86 5599.86 5599.83 5599.91 5599.78 5600.07 5599.84 5599.93 5599.80 5599.80
C2-P11 5599.61 5599.58 5599.47 5599.59 5599.60 5599.62 5599.72 5599.62 5599.98 5599.78 5599.78 5599.79 5599.52
C2-P12 5595.75 5595.68 5595.57 5595.69 5595.74 5595.77 5595.85 5595.65 5596.18 5595.81 5595.81 5596.04 5595.51
C2-P13 5604.17 5604.02 5603.86 5603.99 5604.02 5604.16 5604.13 5604.21 5604.33 5604.15 5604.12 5603.71 5603.88
C2-P14 5602.34 5602.34 5602.14 5602.28 5602.31 5602.29 5602.34 5602.28 5602.38 5602.19 5602.20 5601.93 5602.14
C2-P15 5602.17 5602.20 5602.01 5602.17 5602.19 5602.20 5602.19 5602.08 5602.04 5602.01 5602.02 5601.89 5601.93
C2-P16 5602.68 5602.66 5602.49 5602.64 5602.63 5602.63 5602.59 5602.44 5602.58 5602.34 5602.38 5602.23 5602.30
C2-P17 5606.36 5606.30 5606.11 5606.26 5606.29 5606.34 5606.43 5606.47 5606.52 5606.39 5606.28 5605.86 5606.08
C2-P18 5605.59 5605.40 5605.12 5605.20 5605.26 5605.32 5605.29 5605.35 5605.42 5605.31 5605.23 5604.70 5604.81
C2-P19 5607.49 5607.50 5607.40 5607.58 5607.63 5607.56 5607.48 5607.29 5607.21 5606.98 5606.95 5606.56 5606.88
C2-P20 5609.30 5609.15 5608.98 5609.07 5609.14 5609.22 5609.26 5609.34 5609.38 5609.29 5609.19 5608.78 5608.97
C2-P21 5609.83 5609.70 5609.49 5609.60 5609.65 5609.71 5609.77 5609.79 5609.90 5609.83 5609.77 5609.26 5609.44
C2-P22 5610.37 5610.29 5610.07 5610.20 5610.28 5610.30 5610.33 5610.26 5610.37 5610.21 5610.16 5609.61 5609.84
C2-P23 5611.19 5610.97 5610.85 5610.88 5610.94 5611.01 5610.96 5610.89 5610.89 5610.78 5610.61 5610.41 5610.15
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation (ft amsl]
Piezometer 5/5/2021 6/3/2021 7/9/2021 8/10/2021 9/8/2021 10/7/2021 11/4/2021 12/3/2021 1/13/2022 2/4/2022 3/2/2022 4/6/2022 5/2/2022
C2-P01 5610.79 5611.04 5611.36 5611.63 5611.63 5611.71 5611.44 5611.21 5610.66 5610.54 5610.29 5610.49 5610.42
C2-P02 5610.91 5611.03 5611.23 5611.50 5611.58 5611.72 5611.57 5611.40 5610.86 5610.83 5610.39 5610.60 5610.45
C2-P03 5610.06 5610.16 5610.30 5610.45 5610.50 5610.62 5610.49 5610.32 5609.92 5609.78 5609.46 5609.62 5609.46
C2-P04 5611.37 5611.47 5611.61 5611.76 5611.77 5611.83 5611.64 5611.58 5611.13 5611.17 5610.85 5610.98 5610.84
C2-P05 5606.05 5606.03 5606.03 5606.06 5606.08 5606.18 5606.14 5606.07 5605.91 5605.79 5605.62 5605.64 5605.49
C2-P06 5606.90 5606.96 5606.96 5607.03 5606.98 5607.10 5607.01 5607.00 5606.74 5606.69 5606.47 5606.58 5606.38
C2-P07 5607.44 5607.52 5607.55 5607.62 5607.59 5607.65 5607.52 5607.49 5607.19 5607.24 5607.02 5607.09 5606.97
C2-P08 5603.04 5603.07 5603.06 5603.07 5603.08 5603.25 5603.22 5603.20 5602.97 5602.94 5602.72 5602.85 5602.65
C2-P09 5601.36 5601.38 5601.37 5601.37 5601.33 5601.26 5601.39 5601.41 5601.38 5601.22 5601.17 5601.22 5601.05
C2-P10 5599.40 5599.54 5599.49 5599.48 5599.41 5599.52 5599.44 5599.58 5599.39 5599.42 5599.31 5599.35 5599.20
C2-P11 5599.32 5599.37 5599.39 5599.40 5599.30 5599.50 5599.39 5599.42 5599.19 5599.38 5599.14 5599.11 5598.99
C2-P12 5595.28 5595.26 5595.26 5595.29 5595.23 5595.41 5595.24 5595.36 5594.98 5595.21 5594.98 5594.91 5594.75
C2-P13 5603.52 5603.57 5603.58 5603.68 5603.68 5603.86 5603.80 5603.81 5603.52 5603.54 5603.31 5603.44 5603.22
C2-P14 5601.63 5601.77 5601.76 5601.79 5601.83 5601.99 5601.92 5601.96 5601.82 5601.69 5601.62 5601.68 5601.58
C2-P15 5601.50 5601.66 5601.62 5601.68 5601.70 5601.87 5601.79 5601.91 5601.68 5601.60 5601.51 5601.57 5601.47
C2-P16 5601.83 5601.98 5601.96 5602.07 5602.08 5602.24 5602.14 5602.23 5602.03 5601.73 5601.88 5601.67 5601.87
C2-P17 5605.55 5605.68 5605.66 5605.78 5605.89 5606.06 5606.05 5606.04 5605.81 5605.40 5605.52 5605.25 5605.48
C2-P18 5604.22 5604.35 5604.29 5604.46 5604.55 5604.73 5604.70 5604.75 5604.43 5604.14 5604.14 5603.91 5604.06
C2-P19 5606.41 5606.60 5606.64 5606.75 5606.78 5606.82 5606.66 5606.64 5606.47 5606.08 5606.27 5606.05 5606.33
C2-P20 5608.48 5608.63 5608.59 5608.71 5608.83 5608.96 5608.99 5608.98 5608.73 5608.39 5608.49 5608.22 5608.45
C2-P21 5608.86 5609.00 5608.96 5609.09 5609.18 5609.36 5609.39 5609.41 5609.25 5608.81 5608.87 5608.62 5608.84
C2-P22 5609.31 5609.47 5609.46 5609.59 5609.63 5609.77 5609.71 5609.76 5609.61 5609.21 5609.24 5609.07 5609.24
C2-P23 5610.01 5609.94 5609.94 5610.04 5610.11 5610.16 5610.15 5610.07 5609.84 5609.91 5609.66 5609.66 5609.55
Energy Fuels Resources (USA) Inc. White Mesa Mill Cell 2 Standpipe Piezometers Water Surface Elevation
,
Piezometer 6/22/2022 7/6/2022 8/4/2022 9/1/2022 10/7/2022 11/8/2022 12/1/2022 1/10/2023 2/2/2023 3/9/2023
C2-P01 5610.51 5610.74 5610.98 5611.22 5611.12 5611.11 5610.89 5610.39 5609.92 5609.83
C2-P02 5610.32 5610.53 5610.77 5611.01 5610.99 5611.14 5610.98 5610.52 5610.02 5609.87
C2-P03 5609.33 5609.49 5609.65 5609.86 5609.80 5609.90 5609.78 5609.40 5608.96 5608.87
C2-P04 5610.71 5610.90 5611.07 5611.16 5611.12 5611.22 5611.08 5610.78 5610.42 5610.32
C2-P05 5605.31 5605.36 5605.38 5605.49 5605.43 5605.51 5605.50 5605.32 5605.02 5605.00
C2-P06 5606.13 5606.26 5606.30 5606.37 5606.27 5606.39 5606.37 5606.21 5605.81 5605.72
C2-P07 5606.77 5606.90 5606.96 5606.97 5606.93 5607.00 5606.92 5606.77 5606.50 5606.48
C2-P08 5602.38 5602.54 5602.57 5602.68 5602.59 5602.77 5602.77 5602.61 5602.19 5602.18
C2-P09 5600.93 5600.93 5600.90 5600.92 5600.92 5600.94 5600.99 5600.94 5600.62 5600.54
C2-P10 5598.98 5599.07 5599.07 5600.01 5599.96 5599.97 5599.96 5599.93 5599.63 5599.55
C2-P11 5598.84 5598.90 5598.87 5598.88 5599.05 5599.07 5599.02 5598.90 5598.77 5598.64
C2-P12 5594.50 5594.54 5594.53 5594.53 5594.71 5594.63 5594.59 5594.46 5594.30 5594.15
C2-P13 5603.00 5603.16 5603.24 5603.32 5603.32 5603.51 5603.49 5603.30 5602.94 5602.87
C2-P14 5601.33 5601.42 5601.45 5601.53 5601.54 5601.64 5601.68 5601.53 5601.17 5601.11
C2-P15 5601.24 5601.34 5601.37 5601.44 5601.44 5601.53 5601.54 5601.35 5601.10 5601.08
C2-P16 5601.64 5601.76 5601.79 5601.85 5601.82 5601.92 5601.92 5601.76 5601.51 5601.49
C2-P17 5605.16 5605.25 5605.33 5605.44 5605.43 5605.74 5605.78 5605.51 5605.05 5604.99
C2-P18 5603.65 5603.78 5603.88 5604.04 5604.05 5604.37 5604.41 5604.18 5603.75 5603.65
C2-P19 5606.12 5606.25 5606.33 5606.44 5606.33 5606.39 5606.34 5606.19 5605.81 5605.80
C2-P20 5608.17 5608.24 5608.31 5608.43 5608.45 5608.70 5608.73 5608.33 5608.04 5607.98
C2-P21 5608.42 5608.53 5608.64 5608.81 5608.80 5609.14 5609.16 5608.91 5608.47 5608.38
C2-P22 5608.86 5608.99 5609.08 5609.21 5609.19 5609.44 5609.47 5609.24 5608.84 5608.78
C2-P23 5609.33 5609.37 5609.46 5609.59 5609.66 5609.83 5609.77 5609.52 5609.45 5609.36
5,615
5,610
5,605 -... --C
0 ...
l'O > aJ
w
aJ > aJ 5,600 ...I
I..
aJ ...
l'O s
5,595 -+-C2-P01 -C2-P02 ~C2-P03
-C2-P07 ~C2-P08 --e-C2-P09
~C2-P13 -+-C2-P14 ·-.,, C2-P15
~C2-P19 ~C2-P20 -S-C2-P21
5,590
Jun-16 Dec-16 Jun-17 Dec-17 Jun-18
-iir-C2-P04
-B-C2-P10
C2-P16
~C2-P22
Dec-18
Figure 2 -Cell 2 Standpipe Piezometers
Water Level Elevations
~C2-POS -+-C2-P06
~ C2-Pll ~C2-P12
Notes:
-.-c2-P17 --..E-C2-P18 1. Pieozometer C2-P01 reading for Mar 20, 2019 was
erroneous due to an issue with the water level meter.
~C2-P23 2. Piezometer C2-P10 was hit by a vehicle on September
1, 2022. Soil fell in the casing and the water level
Jun-19 Dec-19
increased b6 a6out 2 feet.
Jun-20 ec-20 Jun-21 Dec-21 Jun-22
Date
(2)
Dec-22 Jun-23 Dec-23
2216500
C2-P01 + C2-P02 +
-------
2217000 2217500
\
C2-P.06 I
2218000
C2-P08 +
0 2-P1 ~
-1'1
2218500 2219000 2219500
C2-P13 C2-P1 7 O2-P20 + \ + +
C2-P21 -+{ I I t
\c2-P15 C2-P22 + +
C2-f?16
C2-P23 + it---+--+----+----=~..l_d-+.t-l---:---J--+-----.1--h-~+~ S!
0 0 ,,,
"" ~ S!
0 0 ,,, ..,
ID ~ S!
0 0 O 0 ~i ---------,----------t---------+---------+---------~~---------+---------j_ ____ _j_2 S! ~ S!
2216500 2217000 2217500
0
?;t;•t ENERGY FUELS
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
January 2023 Piezometer Contours
Date: 3/21/2023 JA
2216500 2217000 2217500
C2-P02
2216500 2217000 2217500
0
W I ENERGY FUELS
0
200
50
400
Feet
100
Meters
2218000
2218000
C2-P13 +
C2-P15 +
800
200
C2-P16 +
2218500
C2-P17
4-
2218500
N
A
2219000
2219000
C2-P20
C2-P23 +
2219500
2219500
ENERGY FUELS INC.
225 Union Blvd Suite 600
Lakewood, Colorado 80228
Cell 2
February 2023 Piezometer Contours
Date: 3/2112023 JA
2216500
C2-P01 +
2217000 2217500
C2-P05 +
2218000
C2-P13 +
C2-P15 +
C2-P16 +
2218500
C2-P17
4-
2219000 2219500
C2-P.20
/
C C C C ;,--------,-----------t----------t-------------+-----------+-----------t---------_J ____ J I
2216500 2217000 2217500
0
~, ENERGYFUELS
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
March 2023 Piezometer Contours
Date: 3/2 J/2023 JA
~
Attachment D
Feet Below Top of Standpipe
w N N N N N N N N N N
0 I.O 00 -.J en l.n .i:,. w N !"-' 0 a a a a a a a a a 0 a 0 0 0 0 0 0 0 0 0 0 0
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
n +
10/31/2012
tD 3/31/2013 Vl (D
N "'1 8/31/2013 iii"
V\
V, N 1/31/2014 --· 3 6/30/2014
tD 11/30/2014 u,
C 4/30/2015
""I 0J
I 9/30/2015 -· ::::, 2/29/2016 C:
::I 7/31/2016 N (D
Ql 0 ....
0 vi" ■ 12/31/2016 (D U) .... iii" 5/31/2017 V\ ~ N 10/31/2017
0 N 3/31/2018 w 8/31/2018
1/31/2019
6/30/2019
11/30/2019
4/30/2020
9/30/2020
2/28/2021
7/31/2021
rl r 12/31/2021
5/31/2022
10/31/2022
Attachment E
This attachment has been deliberately left blank.
Attachment F
Cell 4A LDS Monitoring Information
January 2023 February 2023 March 2023
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
1/1/23 4.4 746964 2/1/23 4.6 747500 3/1/23 5.1 747701
1/2/23 4.4 746964 2/2/23 4.7 747500 3/2/23 5.1 747701
1/3/23 4.5 746964 2/3/23 4.7 747500 3/3/23 5.4 747701
1/4/23 4.6 746964 2/4/23 4.8 747500 3/4/23 5.7 747701
1/5/23 4.9 746964 2/5/23 4.9 747500 3/5/23 5.9 747701
1/6/23 4.9 746964 2/6/23 4.9 747500 3/6/23 6.1 747701
1/7/23 4.8 746964 2/7/23 4.9 747500 3/7/23 6.1 747701
1/8/23 4.9 746964 2/8/23 5.0 747500 3/8/23 6.2 747701
1/9/23 4.9 746964 2/9/23 3.8 747701 3/9/23 6.2 747701
1/10/23 5.0 746964 2/10/23 3.8 747701 3/10/23 6.3 747701
1/11/23 4.0 747111 2/11/23 3.9 747701 3/11/23 6.4 747701
1/12/23 4.0 747111 2/12/23 4.0 747701 3/12/23 6.5 747701
1/13/23 4.0 747111 2/13/23 4.1 747701 3/13/23 6.9 747701
1/14/23 4.2 747111 2/14/23 4.1 747701 3/14/23 6.9 747701
1/15/23 4.3 747111 2/15/23 4.1 747701 3/15/23 6.9 747701
1/16/23 4.2 747111 2/16/23 4.0 747701 3/16/23 14.2 758580
1/17 /23 4.5 747111 2/17/23 4.0 747701 3/17/23 5.6 763323
1/18/23 4.6 747111 2/18/23 4.3 747701 3/18/23 8.1 768510
1/19/23 4.7 747111 2/19/23 4.4 747701 3/19/23 9.3 773697
1/20/23 4.9 747111 2/20/23 4.4 747701 3/20/23 13.9 778603
1/21/23 4.9 747111 2/21/23 4.4 747701 3/21/23 11.9 786052
1/22/23 5.0 747111 2/22/23 4.4 747701 3/22/23 13.6 791009
1/23/23 5.3 747111 2/23/23 4.7 747701 3/23/23 13.9 793244
1/24/23 4.0 747500 2/24/23 4.7 747701 3/24/23 13.6 795410
1/25/23 4.3 747500 2/25/23 4.8 747701 3/25/23 7.3 803187
1/26/23 4.3 747500 2/26/23 4.9 747701 3/26/23 12.6 814276
1/27/23 4.3 747500 2/27/23 4.9 747701 3/27/23 11.4 826040
1/28/23 4.5 747500 2/28/23 5.0 747701 3/28/23 5.7 838802
1/29/23 4.5 747500 3/29/23 5.7 849118
1/30/23 4.5 747500 3/30/23 11.1 859511
1/31/23 4.6 747500 3/31/23 6.1 869761
Total Gallons Pumped per Month 536 201 122,060
Total Gallons pumped for Ql 122,797
Cell 4B LDS Monitoring Information
January 2023 February 2023 March 2023
Weekly measurements in
Weekly measurements in Weekly measurements in inches from transducer at
inches from transducer at the Flow Meter inches from transducer at the Flow Meter the bottom of the LDS Flow Meter
Date bottom of the LDS sump. in Gallons Date bottom of the LDS sump. in Gallons Date sump. in Gallons
1/1/23 4.72 31 2/1/23 4.72 200 3/1/23 4.72 400
1/2/23 4.72 31 2/2/23 4.72 200 3/2/23 4.72 400
1/3/23 4.72 31 2/3/23 4.72 200 3/3/23 4.72 400
1/4/23 4.72 31 2/4/23 4.72 200 3/4/23 4.72 400
1/5/23 4.72 31 2/5/23 4.72 200 3/5/23 4.72 400
1/6/23 4.72 31 2/6/23 4.72 200 3/6/23 4.72 400
1/7/23 4.72 31 2/7/23 4.72 200 3/7/23 4.72 400
1/8/23 4.72 31 2/8/23 4.72 200 3/8/23 4.72 400
1/9/23 4.72 31 2/9/23 3.90 400 3/9/23 4.72 400
1/10/23 4.72 31 2/10/23 3.90 400 3/10/23 4.72 400
1/11/23 3.90 114 2/11/23 4.72 400 3/11/23 4.72 400
1/12/23 3.90 114 2/12/23 4.72 400 3/12/23 4.72 400
1/13/23 3.90 114 2/13/23 4.72 400 3/13/23 4.72 400
1/14/23 4.72 114 2/14/23 3.90 400 3/14/23 4.72 400
1/15/23 4.72 114 2/15/23 3.90 400 3/15/23 4.72 400
1/16/23 4.72 114 2/16/23 3.90 400 3/16/23 4.72 400
1/17/23 4.72 114 2/17/23 3.90 400 3/17/23 4.72 400
1/18/23 4.72 114 2/18/23 4.72 400 3/18/23 4.72 400
1/19/23 4.72 114 2/19/23 4.72 400 3/19/23 4.72 400
1/20/23 4.27 114 2/20/23 3.90 400 3/20/23 4.72 400
1/21/23 4.72 114 2/21/23 4.72 400 3/21/23 4.72 400
1/22/23 4.72 114 2/22/23 4.72 400 3/22/23 4.72 400
1/23/23 4.72 114 2/23/23 4.72 400 3/23/23 4.72 400
1/24/23 4.72 200 2/24/23 4.72 400 3/24/23 4.72 400
1/25/23 4.72 200 2/25/23 4.72 400 3/25/23 4.72 400
1/26/23 4.72 200 2/26/23 4.72 400 3/26/23 4.72 400
1/27/23 4.72 200 2/27/23 4.72 400 3/27/23 4.72 400
1/28/23 4.72 200 2/28/23 4.72 400 3/28/23 4.72 400
1/29/23 4.72 200 3/29/23 4.72 400
1/30/23 4.72 200 3/30/23 4.72 400
1/31/23 4.72 200 3/31/23 3.90 450
Total Gallons Pumped per Month 169 200 50
Total Gallons pumped for Qt 419
White Mesa Mill -Discharge Minimization Technology Monitoring Plan 12/16 Revision: EFRl 12.4
Page 25 of25
ATTACHMENT C
TABLES
Table IA
Calculated Action leakage Rates
for Various head Conditions
Cell 4A White Mesa Mill
Blanding, Utah
Head above Liner System (feet) Calculated Action leakage Rate
5
10
15
20
25
30
35
37
( gallons I acre / day )
Table lB
Calculated Action leakage Rates
for Various head Conditions
Cell 4B White Mesa Mill
Blanding, Utah
222.04
314.01
384.58
444.08
496.50
543.88
587.46
604.01
Head above Liner System (feet) Calculated Action leakage Rate
( gallons / acre / day )
5 211.40
10 317.00
15 369.90
20 422.70
25 475.60
30 528.40
35 570.00
37 581.20
Calculation of Maximum Daily Allowable LDS Flow Volume for Varying Head Conditions in
Cells 4A and 4B
The equation for the calculation of maximum daily allowable flow volume in Cells 4A and 4B is
as follows:
Step 1)
Where:
Step 2)
Step 3)
Step 4)
Elevation I-Elevation 2 = Head (ft.)
Elevation 1 is the maximum elevation in feet measured during the reporting
period.
Elevation 2 is the FML elevation in feet.
Determine Calculated Action Leakage Rate from Table IA (for Cell 4A) or Table
1B (for Cell 4B) using the head calculated in Step 1 above. If the head calculated
in step 1 above falls between two values in the Head Above Liner System (feet)
column, then the closer of these two values will be used to determine the
Calculated Action Leakage Rate.
Calculate the acres of tailings cell fluids based on the area of the base of the cell,
the head, and the angle of the sideslopes of the cell.
Action Leakage Rate (from Table IA or 1B) X Acres of Tailings Cell Fluids =
Maximum Daily Allowable Flow Volume
Max head on Cell 4A FML
Max elevation (ft.)
FML elevation (ft.)
Head (ft.)
From BAT O&M Table 1A (gallon/acre/day)
Acres of fluid based on maximum level (acres)
Max allowable flow rate (gal/day)
4A-Q12023
5587.5
5555.55
31.95
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-Ql 2023
5572.49
5557.50
14.99
369.90
32.98
12,199
Cell 1, Cell 2, and Cell 3 LDS Monitoring Information -First Quarter 2023
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 LOS sump. bottom of the LOS sump.
1/6/2023 Dry 1/6/2023 Dry 1/6/2023 Dry
1/12/2023 Dry 1/12/2023 Dry 1/12/2023 Dry
1/20/2023 Dry 1/20/2023 Dry 1/20/2023 Dry
1/27/2023 Dry 1/27/2023 Dry 1/27/2023 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 LOS sump. bottom of the LOS sump.
2/3/2023 Dry 2/3/2023 Dry 2/3/2023 Dry
2/10/2023 Dry 2/10/2023 Dry 2/10/2023 Dry
2/16/2023 Dry 2/16/2023 Dry 2/16/2023 Dry
2/24/2023 Dry 2/24/2023 Dry 2/24/2023 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 LOS sump. bottom of the LOS sump.
3/3/2023 Dry 3/3/2023 Dry 3/3/2023 Dry
3/10/2023 Dry 3/10/2023 Dry 3/10/2023 Dry
3/17/2023 Dry 3/17/2023 Dry 3/17/2023 Dry
3/24/2023 Dry 3/24/2023 Dry 3/24/2023 Dry
3/31/2023 Dry 3/31/2023 Dry 3/31/2023 Dry
Attachment G
This attachment has been deliberately left blank.
Attachment H
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ENERGY FUELS RESOURCES (USA), INC.
WHITE MESA MILL
San Juan County, Utah
Feedstock Storage Area Map
D Feedstock Storage Area
Date: January 2022
Source: Energy Fuels, 2022
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San Juan County, Utah
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WHITE MESA MILL
San Juan County, Utah
Feedstock Storage Area Map
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Date: January 2022
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D Feedstock Storage Area
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Attachment I
Energy Fuels Resources (USA) Inc.
White Mesa Mill
Precipitation Chart
Rain or Snow Recorded in Inches of Moisture Received
YEAR 2023 Month January
Rain Snow Rain Snow
1 17 0.70 O.'/U,
2 18 (').GJ7
3 19
4 20 0.2'1
5 21 0.0'3
6 22 o.os-
7 23 0,07
8 24
9 25
10 26 ~ 0~
11 27
12 28
13 29
14 30
15 31 o. '-I&
16 l).~
Combined
Total: '3 ,15
Energy Fuels Resources (USA) Inc.
White Mesa Mill
Precipitation Chart
Rain or Snow Recorded in Inches of Moisture Received
YEAR 2023 Month February
Rain Snow Rain Snow
1 17
2 18
3 19
4 20 I
5 21
6 22 , ,_,---
7 23 .. 10
8 24
g 25
10 26
11 27
12 28
13 29 o. dwl
14 30 {) s~
15 31
16
Combined
Total: I. 09
Energy Fuels Resources (USA) Inc.
White Mesa Mill
Precipitation Chart
Rain or Snow Recorded in Inches of Moisture Received
YEAR 2023 Month March
Rain Snow Rain Snow
1 17 o.~1
2 18 o. I ii
3 19
4 20 0,3~
5 21 o.,~
6 22 0, c-~
7 23
8 24 _.µ+-{'c\
9 25 • I '-l
10 26
11 27 o, 1g
12 28 0.0'8
13 29 o.~.:T
14 30 a.a< D-0~
15 31 o.~3
16 o.~~
Combined
Total: ~-7Y