DRC-2016-010712 - 0901a0688067876a

State of Utah
GARY R HERBERT
Governor
SPENCER J. COX
Lieutenant Governor
Department of
Environmental Quality
Alan Matheson
Executive Director
DIVISION OF WASTE MANAGEMENT
AND RADIATION CONTROL
Scott T Anderson
Director
MEMORANDUM DRc-^oit-oioTia
TO:
FROM:
DATE:
Phil Goble /°/ W2Z> 16
Dean Henderson ^
October 13, 2016
SUBJECT: Review of the 1st Quarter and 2nd Quarter 2016 Nitrate Monitoring Report for the Nitrate
Contamination Investigation, Energy Fuels Resources (USA) Inc. (“EFR“) White Mesa
Uranium Mill, near Blanding, Utah
The Utah Division of Waste Management and Radiation Control (“Division”) has reviewed the EFR
May 17, 2016, White Mesa Uranium Mill 1st Quarter, 2016 Nitrate Monitoring Report (“1st Quarter,
2016”) and the August 16, 2016, White Mesa Uranium Mill 2nd Quarter, 2016 Nitrate Monitoring Report
(“2nd Quarter, 2016”) [“Reports”] for the Nitrate Contamination Investigation.
For the review of this Report the following regulatory enforcement documents were used:
• Corrective Action Plan for Nitrate White Mesa Uranium Mill near Blanding, Utah, May 7,
2012, (“CAP”) approved December 12, 2012.
• The EFR Quality Assurance Plan, June 7, 2012, Revision. 7.2 (“QAP”)
REVIEW
Monitor Well Sampling
For both the 1st Quarter, 2016 and the 2nd Quarter, 2016 the following monitor wells were sampled and
analyzed for inorganic chloride and nitrate + nitrite (as N) as required in the CAP:
TWN-1, TWN-2, TWN-3, T.WN-4, TWN-7, TWN-18, TW4-22 (pumping well), TW4-24 (pumping
well), and TW4-25 (pumping well), and Piezometer 1, Piezometer 2, and Piezometer 3. Piezometer-3
was abandoned and replaced with Piezometer-3 A in March 2016. Therefore, Piezometer-3 A was
sampled for the first time in the 2nd Quarter, 2016.
195 North 1950 West • Salt Lake City, UT
Mailing Address: P O Box 144880 • Salt Lake City, UT 84114-4880
Telephone [phone] • Fax [phone] • T D.D (801) 5364414
ximiw.deq.uttih.gov
Printed on 100% recycled paper
Page 2
For both the 1st Quarter, 2016 and the 2nd Quarter, 2016 the monitoring wells were purged using the
three approved QAP well purging strategies and meet QAP requirements for each strategy:
1. Purging two casing volumes with stable field parameters for specific conductivity,
turbidity, pFI, redox potential, and water temperature (within 10% RPD):
Wells: TWN-1, TWN-4, and TWN-18.
2. Purging a well to dryness and stability of field parameters for pFI, specific conductivity, and
water temperature only after recovery:
Wells: TWN-3 and TWN-7
3. Continuously Pumped Wells that are considered sufficiently evacuated to immediately
collect a sample:
Wells: TWN-2, TW4-22, TW4-24, and TW4-25
Chloride and nitrate + nitrite (as N) were analyzed for methods consistent with the requirements of the
QAP.
QAQC
Holding Times
For both the 1st Quarter, 2016 and
samples collected at each monitor
the QAP.
Receipt Temperature
For both the 1st Quarter, 2016 and
QAP temperature limit of 6° C.
Detection Limits
For both the 1st Quarter, 2016 and
the required QAP reporting limits.
Sample Duplicates
For the 1st Quarter, 2016, one duplicate sample was collected at TWN-1 and identified as TWN-65. The
duplicate sample analytical results for this sample/duplicate pair were within the 20% acceptance limits
as required in the QAP (see Table 2 below).
For the 2nd Quarter, 2016, one duplicate sample was collected at TWN-18 and identified as TWN-65.
The duplicate sample analytical results for this sample/duplicate pair were within the 20% acceptance
limits as required in the QAP (see Table 2 below).
the 2nd Quarter, 2016 the method holding times for each parameter for
well were received and analyzed within the required holding times in
the 2nd Quarter, 2016 all samples were received within the required
the 2nd Quarter, 2016 all sample sets were measured and reported to
Page 3
Groundwater Head Monitoring
For both the 1st Quarter, 2016 and the 2nd Quarter, 2016 depth to groundwater was measured in the
following wells and/or piezometers as required in Part I.E.3 of the Permit:
• The quarterly groundwater compliance monitoring wells.
• Existing monitoring well MW-4 and all of the temporary chloroform investigation
wells.
• Piezometers P-1, P-2, P-3, P-4 and P-5. Piezometer-3 was abandoned and replaced with
Piezometer-3 A in March 2016. Therefore, Piezometer-3 A first depth to groundwater
measurement was taken in the 2nd Quarter, 2016.
• MW-20, MW-22 and MW-34
• Nitrate monitoring wells.
• The DR piezometers which were installed during the Southwest Hydrologic
Investigation.
In addition to the above, depth to water measurements are routinely observed in conjunction with
sampling events for all wells sampled during quarterly and accelerated efforts, regardless of the
sampling purpose.
All well levels used for groundwater contour mapping were measured and recorded within 5 calendar
days of each other.
Estimation of Pumped Nitrate Mass Removal
For the 1st Quarter, 2016 and the 2nd Quarter, 2016 reports reported an estimated 132.55 lbs. and 99.98
lbs. respectively of nitrate was removed from the chloroform pumping wells (MW-4, MW-26, TW4-1,
TW4-2, TW4-4, TW4-11, TW4-19, TW4-20, and TW4-37) and the nitrate pumping wells (TWN-2,
TW4-22, TW4-24, and TW4-25). For the 1st Quarter, 2016 of the 132.55 lbs. removed approximately
123.41 lbs. or 93%, was removed by the pumping wells inside the nitrate plume. For the 2nd Quarter,
2016 of the 99.98 lbs. removed approximately 90.53 lbs. or 91%, was removed by the pumping wells
inside the nitrate plume. In the attached Table 3, the DWMRC shows calculations that verify these
reported estimates.
Reporting
Each Report included the following information as required in the CAP:
a) Introduction
b) Sampling and Monitoring Plan:
i. Description of monitor wells sampled;
ii. Description of sampling methodology, equipment and decontamination
procedures;
iii. Identification of all quality assurance samples, e.g. equipment blanks
duplicate samples, etc.
c) Data Interpretation:
Page 4
i. Interpretation of groundwater levels, gradients, and flow directions. The interpretation will
include a discussion on: 1) current site groundwater contour map, 2) hydrographs to show
groundwater elevation in each monitor well over time, 3) depth to groundwater measured and
groundwater elevation from each monitor well summarized in data table that includes historic
groundwater level data for each well, 4) calculations documenting quarterly nitrate mass
removed by pumping;
ii. Interpretation of all analytical results for each well including a discussion on: 1) a current
nitrate isoconcentration map, 2) graphs showing nitrate concentration trends in each well
through time and, analytical results for each well summarized in data table that includes
historic analytical results for each well; and
iii. An electronic copy of all laboratory results for groundwater quality monitoring conducted
during the quarter will be provided to the Executive Secretary.
d) Conclusions and Recommendations
e) Copies of EFR field reports, laboratory reports, and chain of custody forms. The nitrate plume is
defined to include any monitoring well that has concentration of nitrate in excess of 10 mg/L.
Evaluation of the Nitrate Contaminate Plume and Its Associated Contaminants
Bounding And Hydraulic Control of the Chloroform Plume
For both the 1st Quarter, 2016 and the 2nd Quarter, 2016 groundwater monitoring data appeared to show
that the nitrate contaminate plume (“Plume”) is bound by up gradient, cross gradient, and down gradient
wells that have a nitrate concentrations of <10 mg/L (GWQS = 10 mg/L). In addition, based on water
level data, groundwater contour, and capture zone maps in the Reports it appears that upgradient of
pumping wells TW4-19, TW4-20, TW4-22, TW4-24, and TW4-37 the Nitrate Plume is being captured.
Conclusions on Compliance with the CAP, QAP
Per the Division review it appears that both the 1st Quarter 2016 Nitrate Monitoring Report and the 2nd
Quarter 2016 Nitrate Monitoring Report for the Nitrate Contamination Investigation, Energy Fuels
Resources (USA) Inc. complies with the CAP and QAP. Therefore, a letter will be drafted for the
Director Signature, notifying EFR of the review and closing-out of this report.
Page 5
References
Energy Fuels Resources (USA) Inc., White Mesa Uranium Mill 1st Quarter, 2016 Nitrate Monitoring
Report, May 17, 2016.
Energy Fuels Resources (USA) Inc., White Mesa Uranium Mill 2nd Quarter, 2016 Nitrate Monitoring
Report August 16, 2016.
Energy Fuels Resources (USA) Inc., June 7, 2012, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assurance Plan (Revision 7.2).
HYDRO GEO CHEM, INC, May 7, 2012, Corrective Action Plan for Nitrate White Mesa Uranium Mill
near Blanding, Utah
Table 1 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-1
Monitoring Event
TWN-2 (Pumping welt starting in January 2013) ||
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010 0.5 17 1st Qtr 3/24/2010 85
2nd Qtr5/26/2010 0.6 20 2nd Qtr6/2/2010 97
3rd Qtr 9/27/2010 0.6 19 3rd Qtr9/29/2010 104
4th Qtr12/7/2010 0.6 14 4th Qtr12/9/2010 93
1st Qtr 1/26/2011 0.5 17 1st Qtr 2/1/2011 93
2nd Qtr4/20/2011 0.5 19 2nd Qtr4/28/2011 85
3rd Qtr7/26/2011 0.5 14 3rd Qtr 7/28/2011 74
4th Qtr 10/17/2011 0.5 10 4th Qtr 10/20/2011 76
1st Qtr 1/9/2012 0.6 15 1st Qtr 1/12/2012 86
2nd Qtr4/18/2012 0.6 17 2nd Qtr4/20/2012 ■103
3rd Qtr 7/24/2012 0.6 17 3rd Qtr 7/31/2012 ■93
4th Qtr 10/17/2012 0.43 17.5 4th Qtr7/17/2012 79
Nitrate Pumping Systemi Started in January 2013
1st Qtr 2/18/2013 0.68 17.6 1st Qtr 2/19/2013 :■ mmi ______80.5
2nd Qtr4/23/2013 ...................0.84 ..........17.4 2nd Qtr4/24/2013 ■ 1H: - p 82.1
3rd Qtr8/27/2013 1.24 24.1 3rd Qtr 8/27/2013 75.9
4th Qtr10/16/2013 1.61 26.8 4th Qtr7/16/2013 70.4
1st Qtr 1/14/2014 1.47 29.2 1st Qtr 1/13/2014 72.4
2nd Qtr5/6/2014 1.63 31.1 2nd Qtr 5/7/2014 84.9
3rd Qtr 8/5/2014 ________1.7 28 3rd Qtr 8/6/2014 80
4th Qtr10/8/2014 1.46 27.6 4th Qtr10/8/2014 81
1st Qtr 2/18/2015 1.37 27.8 1st Qtr 2/18/2015 \ 48.6 j 87.81
; TWN^S dup of 7WN-1 1.41 29.0
2nd Qtr 5/13/2015 0.65 29.2 2nd Qtr5/12/2015 52.8 83.6
3rd Qtr8/25/2015 0.624 ..........................33.2 3rd Qtr 8/25/2015 49.7 87.8
4th Qtr10/13/2015 1.35 27.7 4th Qtr10/14/2015 45 74.9
1st Qtr 2/23/2016 1.51 ..................30.3 1st Qtr 2/23/2016 86.3 73.9
2nd Qtr5/17/2016 1.73 32.1 2nd Qtr5/17/2016 45.4 74.5
1st Qtr 1/12/2012
2nd Qtr4/20/2012
3rd Qtr7/31/2012
4th Qtr 10/17/2012
TWN-3
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/25/2010 25 3 111
2nd Qtr6/3/2010 26 118
3rd Qtr 7/16/2010
4th Qtr 12/10/2010
1st Qtr 2/1/2011
2nd Qtr4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
106
117
138
128
134
129
143
152
158
149
Monitoring Event
1st Qtr 3/16/2010
2nd Qtr 5/27/2010
3rd Qtr9/27/2010
4th Qtr12/8/2010
1st Qtr 1/25/2011
2nd Qtr4/20/2011
3rd Qtr7/26/2011
4th Qtr10/18/2011
1st Qtr 1/9/2012
2nd Qtr4/18/2012
3rd Qtr7/25/2012
4th Qtr 7/15/2012
TWN-4
Nitrate, Nitrate +
Nitrite (mg/I)
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr10/17/2013
—■1
1st Qtr 1/15/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014 '
4th Qtr10/9/2014
1st Qtr 2/19/2015
2nd Qtr5/14/2015
3rd Qtr 8/26/2015
4th Qtr 10/14/2015
1st Qtr 2/24/2016
2r,d Qtr 5/18/2016
Nitrate Pumping System Started in January 2013
0.9
1.0
0.9
1.0
0.9
0.9
1.1
0.9
0.9
1.1.. i 4
1.45
Chloride (mg/I)
21
20
24
25
26^4
157 1st Qtr 2/18/2013......_ 1.5 25.3
158 2nd Qtr4/23/2013 1.63 24.4
............... 171 3rd Qtr 8/27/2013 ........................1.6 27.2
163 4th Qtr7/16/2013 1.69 29.4
........ _ 160 1st Qtr 1/14/2014 1.4 28.4
168 2nd Qtr 5/6/2014 1.6 29.6
174 3rd Qtr 8/5/2014.......2.0 28
153 4th Qtr10/8/2014 1.44 SO-7
164 1st Qtr 2/18/2015 .....................1.48 31.5
141 2nd Qtr 5/13/2015 0.733 31.9
156 3rd Qtr 8/25/2015 0.974 35.2
TWN-65 dup of TWN-4 1.160 35.2
129 4th Qtr10/13/20115 1.58 28.4
128 1st Qtr 2/23/2016 2.02 30.7
116 2nd Qtr 5/17/2016...2.97 31.7
■ Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
Table 2 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-5
Monitoring Event
TWN-6
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/16/2010 0.3 43 1st Qtr 3/23/2010...............................1.5 .............19
2nd Qtr 5/26/2010 0,3 44 2nd Qtr 6/1/2010 .........717.1.4 ’ ~ 22
3rd Qtr 7/12/2010 0.3 43 3rd Qtr7/13/2010 III! 171!1-4 73
4th Qtr12/7/2010 0.3 45 4th Qtr12/7/2010 1.2 21
1st Qtr 172572011 0.4 47 1st Qtr 1/26/2011 1.1 .........................18
2nd Qtr4/20/2011 0.3 44 2nd Qtr4/20/2011 17...1 1 .....1.5 1............’'’77......22
3rd Qtr7/26/2011 0.3 44 3rd Qtr 7/27/2011 ........................1.1 .........................17
4th Qtr10/17/2011 0.3 45 4th Qtr10/18/2011 ............14 ' ..............21
1st Qtr 1/9/2012 0.2 *7"___45 1st Qtr 1/10/2012 '77........... i.2 ___7_ 20
2nd Qtr 4/18/2012 ............. 0.3 ................... 39 2nd Qtr4/18/2012 '77777777.7! i-1 77777777! 22
3rd Qtr 7/24/2012 0.3 48 3rd Qtr 7/25/2012 1.4 22
4th Qtr10/15/2012 <0.1 43.5 4th Qtr7/15/2012 0.78 26.4
1st Qtr 2013 NA 1st Qtr 2013 NA
2nd Qtr 2013 NA 2nd Qtr 2013 NA ...................
TWN-5 abandoned on July 31,2013 3rd Qtr 2013 NA
4th Qtr 2013 NA
1st Qtr 2014 NA
2nd Qtr 2014 NA
3rd Qtr 2014 .......NA
4th Qtr 2014 NA
1st Qtr 2015 NA .........
2nd Qtr 2015 NA
3rd Qtr 2015 NA
4th Qtr 2015 NA
1st Qtr 2016 NA
Monitoring Event
TWN-7 TWN-8
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010 7. _____0.8 6 1st Qtr 3/16/2010 <0.1 11
2nd Qtr 5/28/2010 1.2 ............ 6 2nd Qtr5/26/2010 <0.1___________11
3rd Qtr 7/14/2010 1.8 ___ 7 3rd Qtr7/12/2010 <0.1 r, ............._' ...................11
4th Qtr12/10/2010 1 4 4th Qtr12/7/2010 <0.1 9
1st Qtr 1/27/2011.....' ........ 1.3 ______ 6 1st Qtr 1/25/2011 <0.1.....!............_7:.........................13
2nd Qtr4/21/2011...1.7 ..7777.................. 6 2nd Qtr4/19/2011 <0.1 10
3rd Qtr 7/29/2011 0.7 5 3rd Qtr 7/26/2011 <0.1______ .............18
4th Qtr 10/19/2011 2.2 6 4th Qtr10/17/2011 <0.1 10
1st Qtr 1/11/2012 2.3 5 1st Qtr 1/9/2012 <0.1........... _ ......11
2nd Qtr 4/20/2012 i.2 6 2nd Qtr 4/18/2012 <0.1 7...15
3rd Qtr7/26/2012 0.9 6 3rd Qtr 7/24/2012 <0.1 ii
4th Qtr10/16/2012 0.64 5.67 4th Qtr 7/15/2012 <0.1 11.4
Nitrate Pumping System Started in January 2013
1st Qtr 2/19/2013 0.59 ____5.68 1st Qtr 2013 NA
2nd Qtr4/24/2013...1.16 5.88 2nd Qtr 2013 NA
3rd Qtr 8/28/2013 0.835 6.96 TWN-8 abandoned on July 31, 2013
4th Qtr10/16/2013 0.986 5.7
1st Qtr 1/15/2014 0.882 [7___________5.75
2nd Qtr 5/7/2014 0.564 5.263rd Qtr 8/6/2014....0.9 6
4th Qtr10/9/2014 0.968 5.93
1st Qtr 2/19/2015 1.04 5.58
2nd Qtr 5/14/2015 0.779 6.18
3rd Qtr 8/6/2015 0.348 ..........................6.12
4th Qtr10/14/2015 0.672 5.84
1st Qtr 2/24/2016 0.24 6.06pnd Qtr 5/18/2016...0J32 ....6.26
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
Table 3 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-9
Monitoring Event
TWN-10
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/23/2010 7.6 183 1st Qtr 3/23/2010 1.5 54
2nd Qtr 6/1/2010 7.7 175 2nd Qtr 6/2/2010 1.0 30
3rd Qtr 7/15/2010 10,7 210 3rd Qtr 7/14/2010 0.2 .........................21
4th Qtr12/9/2010 8.0 172 4th Qtr12/8/2010 1.3 28
1st Qtr 2/1/2011 9.5 217 1st Qtr 1/26/2011 0.3 40
2nd Qtr4/28/2011 10.0 192 2nd Qtr 4/21/2011 1.2 28
3rd Qtr 7/29/2011 11.0 208 3rd Qtr7/27/2011 0.1 28
4th Qtr10/20/2011 10.9!134 4th Qtr10/18/2011 0.2 33
1st Qtr 1/12/2012 12.2 202 1st Qtr 1/10/2012 0.8 44
2nd Qtr4/20/2012 10.6 209 2nd Qtr4/19/2012 0.9 28
3rd Qtr 7/31/2012 12.3 215 3rd Qtr 7/25/2012 0.6 33
4th Qtr 10/17/2012 ..............12,5 194 4th Qtr 7/16/2012 0.12 30.8
1st Qtr 2013 NA 1st Qtr 2013 NA
2nd Qtr 2013 NA 2nd Qtr 2013 NA
TWN-9 abandoned on July 31, 2013 | TWN-10 abandoned on July 31,2013 !!
Monitoring Event
TWN-11
Monitoring Event
TWN-12
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010 1.4 73 1st Qtr 3/17/2010......0.7 1132nd Qtr 6/1/2010........1.3 72 2nd Qtr 5/26/2010 ....... ....0.8 106
3rd Qtr9/27/2010 .....................1.4 .............; 76 3rd Qtr7/12/2010 77:77;::......0.7 .........7""::....112
4th Qtr12/8/2010 1.4 72 4th Qtr12/7/2010 0.7 103
1st Qtr 1/27/2011 1-4 ............................84 1st Qtr 1/26/2011 ....................4,2 87
2nd Qtr 4/26/2011 ::::::::: 1.4 ”777." ...........76 2nd Qtr4/26/2011 ...1.0 109
3rd Qtr 7/27/2011 ....01 76 3rd Qtr 7/26/2011 0.6 102
4th Qtr10/17/2011 1.6 76 4th Qtr10/17/2011 1.2 87
1st Qtr 1/10/2011 1.6 69 1st Qtr 1/10/2012 0.9 104
2nd Qtr4/19/2012 1.6 71 2nd Qtr4/18/2012 1.2 106
3rd Qtr7/25/2012 _______ 1.8 :_________ 77 3rd Qtr 7/25/2012 1.4 102
4th Qtr10/16/2012 1.84 76.4 4th Qtr 7/16/2012 1.41 101
1st Qtr 2013 NA 1st Qtr 2013 NA .................
2nd Qtr 2013 NA 2nd Qtr2013 NA
TWN-11 abandoned on July 31,2013 TWN-12 abandoned on July 31,2013
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
Table 4 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
TWN-13 TWN-14
Monitoring Event Nitrate, Nitrate +Chloride (mg/I)Monitoring Event Nitrate, Nitrate +Chloride (mg/I)
Nitrite (mg/I)Nitrite (mg/I)
1st Qtr 3/17/2010 <0.1 47 1st Qtr 3/24/2010 2.9 24
2nd Qtr 5/26/2010 0.1 49 2nd Qtr 6/2/2010 2.9 30
3rd Qtr 9/27/2010 0.2 53 3rd Qtr 7/15/2010 3.5 26
4th Qtr12/7/2010 0.4 57 4th Qtr12/10/2010 4.2 28
1st Qtr 1/25/2011 1.6 103 1st Qtr 1/28/2011 3.7 24
2nd Qtr4/26/2011 <0.1 49 2nd Qtr 4/27/2011 ........................3.5 .. 30
3rd Qtr 7/26/2011 0.1 49 3rd Qtr 7/29/2011 3.5 25
4th Qtr10/17/2011 <0.1 48 4th Qtr 10/19/2011 3.9 27
1st Qtr 1/9/2012 <0.1 46 1st Qtr 1/11/2012 .......................3.5 ' ~ ^ ^...... 26
2nd Qtr4/18/2012 <a0.1 .........................J53 2nd Qtr 4/20/2012 3.4 27
3rd Qtr 7/24/2012 ......................b.i 48 3rd Qtr 7/27/2012 ........................3,7 27
4th Qtr10/15/2012 <0.1 47.3 4th Qtr7/17/2012 4.03 27.4
1st Qtr 2013 NA 1st Qtr 2013 NA
2nd Qtr 2013 NA 2nd Qtr 2013 NA.......................
TWN-13 abandoned on July 31,2013 3rd Qtr 2013..............NA
4th Qtr 2013 NA
1st Qtr 2014 NA
2nd Qtr 2014 NA........ ......
3rd Qtr 2014 NA...............
4th Qtr 2014 NA
1st Qtr 2015 NA...............
2nd Qtr 2015 NArrrrrrrrz
3rd Qtr 2015..............nai:::::::::.
4th Qtr 2015 NA
1st Qtr 2016
2nd Qtr 2016
j<:
<

2;
Z ........................
Monitoring Event
TWN-15 TWN-16
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/18/2010 ___________0.7 .............................43 1st Qtr 3/17/2010 1.2 35
2nd Qtr 5/28/2010 '......................1.0 ____________39 2nd Qtr 5/27/2010 1.3 35
3rd Qtr 7/13/2010 1.0 '36 3rd Qtr9/27/2010 ’"’2.6 ....35
4th Qtr12/9/2010 1.2 38 4th Qtr12/9/2010 2 30
1st Qtr 1/27/2011.....1.4 43 1st Qtr 1/27/2011 4.6 34
2nd Qtr4/27/2011 1.6 49 2nd Qtr 4/27/2011.....1.6 _______ 39
3rd Qtr 7/28/2011 1.6 ' 74 7 3rd Qtr 7/27/2011 2.4 "’irz.....'..31
4th Qtr10/19/2011 1.3 38 4th Qtr10/18/2011 2.6 34
1st Qtr 1/11/2012 1.5 38 1st Qtr 1/10/2012 ,, 2.8 33
2nd Qtr4/20/2012 1.6 46 2nd Qtr4/19/2012..............................£0 50|
3rd Qtr 7/26/2012 2.1 50 3rd Qtr7/25/2012......2.4 33
4th Qtr10/17/2012 1.79 47 4th Qtr 7/16/2012 2.50 32.1
1st Qtr 2013 NA............1st Qtr 2013 NA
2nd Qtr 2013 NA 2nd Qtr 2013 NA
TWN-15 abandoned on July 31,2013 3rd Qtr 2013 NA
4th Qtr 2013 NA
1st Qtr 2014 NA
2nd Qtr 2014 NA
3rd Qtr 2014 ....NA
4th Qtr 2014 NA
1st Qtr 2015 NA
2nd Qtr 2015 NA
3rd Qtr 2015 NA
4th Qtr 2015 NA
1st Qtr 2016 NA112nd Qtr 2016 NA
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
Table 5 of 7
Historic Mitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-17
Monitoring Event
TWN-18
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010 10.4 78 1st Qtr 3/17/2010 1.6 42
2nd Qtr 6/3/2010 11 87 2nd Qtr6/1/2010 y..77V7..7..63
3rd Qtr 7/15/2010 8.9 66 3rd Qtr9/27/2010 1.8 64
4th Qtr12/10/2010 8 65 4th Qtr12/9/2010 1.6 59
1st Qtr 2/1/2011 8.6 90 1st Qtr 1/27/2011 1.4 61
2nd Qtr4/28/2011 9 81 2nd Qtr4/26/2011 1.8 67
3rd Qtr 7/29/2011 8.5 74 3rd Qtr7/28/2011 1.8 .......................65
4th Qtr10/20/2011 8.1 71 4th Qtr 10/18/2011 1.9 60
1st Qtr 1/12/2012 8.7 79 1st Qtr 1/10/2012 1.9 64
2nd Qtr4/20/2012 .....................9.1 ........................... 80 2nd Qtr4/19/2012 2.3.64
3rd Qtr 7/27/2012 9.5 ................ ..........85 3rd Qtr7/26/2012 2.3 67
4th Qtr10/17/2012 9.65 84.8 4th Qtr7/16/2012 1.95 67.5
Nitrate Pumping Systemi Started in January 2013
1st Qtr 2013 NA 1st Qtr 2/18/2013 2.27 68.7
2nd Qtr 2013 NA 2nd Qtr4/23/2013 2.32 .............. 643
3rd Qtr 2013 NA 3rd Qtr8/27/2013 2.04 70.4
TWN-17 abandoned on July 31, 2013 4th Qtr10/16/2013 2.15 67.3
1st Qtr /14/2014 .......................2.33 68.4
2nd Qtr5/6/2014 2.18 76.5
3rd Qtr8/5/2014 1.8 70
4th Qtr10/8/2014 1.47 74.8
1st Qtr 2/18/2015 1 73.3
2nd Qtr5/13/2015 1.35 76.6
TWMSdupofTWN-lS <0.10 76.9
3rd Qtr8/25/2015 ......................0.35 .....................81.3
4th Qtr10/13/2015 0.668 69
TWMS dup onWN-lS 0.645 68.6
1st Qtr 2/23/2016 0.648 67.6
2nd Qtr 5/17/2016 0.497 69.9
Monitoring Event
TWN-19
Monitoring Event
Upper Wildlife Pond (UMLP)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr9/27/2010
4th Qtr12/9/2010
7.2
6.2
7.2
118
113
...................... 113
107
1st Qtr 3/18/2010
2nd Qtr6/2/2010
3rd Qtr 7/19/2010
<0.1
<p.i 77 7 777 77<d.i...
<1.0
<1.0 777 777777777<16
7.0 4th Qtr12/10/2010 <0.1 1
1st Qtr 2/1/2011
2nd Qtr4/28/2011
3rd Qtr7/28/2011
4th Qtr 10/18/2011
7.0
77777 6.9 7 77777777'7:16.5
114
77777 77777777120 7"77 77777777 113108
1st Qtr 1/31/2011
2nd Qtr4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
.........................0.1
<0.17 7 7 7<0.1777777777777777.<0.1
1
<1.0'77777<1.0
<1.0
1st Qtr 1/10/2012 7.0 114 1st Qtr 1/31/2012 0.1 1
2nd Qtr4/19/2012 6.8 117 Pond no longer in service
3rd Qtr 7/26/2012
4th Qtr 10/16/2012
7.5
7.7
117
118
1st Qtr 2013
2nd Qtr 2013
3rd Qtr 2013
4th Qtr 2012
NA
NA
NA
NA
1st Qtr 2014
2nd Qtr 2014
3rd Qtr 20144th Qtr 2014...
NA
NA
NA
NA
1st Qtr 2015
2nd Qtr 2015
3rd Qtr 2015
4th Qtr 2015
NA
NA
NA
NA
1st Qtr 2016
2nd Qtr 2016
NA
NA
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
NA = Per the CAP and SCO, these wells not sampled 2013
NS = Not sampled
Table 6 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
PIEZ-1
Monitoring Event
PIEZ-2
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 2010 NS NS 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010 7.2 52 2nd Qtr 6/2/2010 ’’0.6 8
3rd Qtr 7/19/2010 6.8 52 3rd Qtr7/19/2010 0.6 8
4th Qtr12/10/2010 6.5 60 4th Qtr12/10/10 0.2 6
1st Qtr 1/31/2011 7 60 1st Qtr 1/31/2011 0.3 9
2nd Qtr4/25/2011 6.8 58 2nd Qtr 4/25/2011 0.3 8
3rd Qtr7/25/2011 7 53 3rd Qtr 7/25/2011 .........................0.1 9
4th Qtr10/19/2011 6.6 55 4th Qtr 10/19/2011 0.1 8
1st Qtr 1/11/2012 7.1 78 1st Qtr 1/11/2012 0.1 9
1st Qtr 1/10/2012 7.0 114 1st Qtr 1/31/2012 0.1 1
2nd Qtr4/20/2012 6.6 58 2nd Qtr4/20/2012 0.2 8
3rd Qtr7/27/2012 7.2 56 3rd Qtr 7/27/2012 0.2 ...........................9
4th Qtr10/17/2012 7.66 55 4th Qtr 7/17/2012 0.19 9.5
Nitrate Pumping System Started in January 2013
list Qtr 2/19/2013 8.11 56.7 1st Qtr 2/19/2013 ...................... 0.22 .....................9.67
2nd Qtr4/24/2013 8.88 53.3 2nd Qtr4/24/2013 0.172 ...........10.3
3rd Qtr 8/28/2013 7.83 55.1 3rd Qtr8/28/2013 0.198 9^66
4th Qtr10/16/2013 6.68 54.1 4th Qtr10/16/2013 0.36 9.22list Qtr 1/13/2014 6.79 56.2 1st Qtr 1/13/2014 0.169 11.4
2nd Qtr 5/7/2014 7.57 52.1 2nd Qtr 5/7/2014 0.736 H-4
3rd Qtr 8/6/2014 5.1 55 3rd Qtr8/6/2014 ..................... qs 12
4th Qtr10/8/2014 5.75 57.6 4th Qtr10/8/2014 0.755 12.2
1st Qtr 2/18/2015 6.41 55.9 1st Qtr 2/18/2015 0.749 ___________12.5
2nd Qtr5/12/2015 5.95 57.5 2nd Qtr5/12/2015 0.646 ...... 7' ......13.1
3rd Qtr 8/26/2015 4.96 64.2 3rd Qtr8/6/2015 0.7 15.5
4th Qtr10/14/2015 6.17 54.4 4th Qtr 10/14/2015 0.692 13.3
1st Qtr 2/23/2016 8.31 56.5 1st Qtr 2/23/2016 0.615 13.4
2nd Qtr5/12/2016 6.33 59.1 2nd Qtr 5/12/2016 0.665 14
PIEZ-3 PIEZ-3A
Monitoring Event Nitrate, Nitrate +Chloride (mg/I)Monitoring Event Nitrate, Nitrate +Chloride (mg/I)
Nitrite (mg/I)Nitrite (mg/I)
1st Qtr 3/24/2010 ......................1.7 116
2nd Qtr 6/2/2010 ..............16 36
3rd Qtr7/19/2010 ......................1.8 35
4th Qtr12/9/2010 1.8 25
1st Qtr 1/31/2011 ___________1.8 40
2nd Qtr4/25/2011 ..............1.7 35
3rd Qtr7/25/2011 18 61
4thQtr 10/19/2011 1.7 ....12
1st Qtr 1/11/2012 1.8 20
2nd Qtr 4/20/2012 1.7 53
3rd Qtr 7/27/2012 1.8 ............................21
4th Qtr 10/17/2012 2.75 20.1
Nitrate Pumping System Started in January 2013
1st Qtr 2/24/2013 1.85 21
2nd Qtr4/24/2013 1.83 21.2
3rd Qtr 8/28/2013 _________1.81 .......... 22.4
4th Qtr10/16/2013 1.8 ....23.5
1st Qtr 1/13/2014 ___________1.7 26
2nd Qtr5/7/2014 1.79 3' 23.9
3rd Qtr8/6/2014 ........... 1.7 ...26
4th Qtr10/8/2014 1.74 28.3
1st Qtr 2/18/2015 1.82 27.3
2nd Qtr5/12/2015 1.75 30.2
3rd Qtr 8/26/2015 L87 54.8
4th Qtr10/14/2015 2.24 39.5
1st Qtr 2/23/2016 1.82 27.3
PIEZ-3 abandonded May 2016 (1)2nd Qtr 5/12/2016 | 8.331 109
1. New piezometer to replace PIEZ-3 drilled and installed in May 2016. First monitoring event.
NS - Not sampled
NA = Per the CAP and SCO, these wells not sampled 2013
Table 7 of 7
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TW4-22(Pumping well starting in January 2013)TW4-24 (Pumping well stating in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 2/11/2013 58 635 1st Qtr 2/11/2013.....35.9 ___________596
2nd Qtr 6/5/2013 50.2 586 2nd Qtr 6/5/2013 23.7 916
3rd Qtr9/3/2013 29.7 487 3rd Qtr 9/3/2013 ~32.6 998
4th Qtr10/29/2013 45.2 501 4th Qtr 10/3/2013 34.6 1,030
1st Qtr 1/27/2014 54.6 598 1st Qtr 1/27/2014 31.6 809
2nd Qtr5/19/2014 47.2 614 2nd Qtr5/19/2014 35 1,020
3rd Qtr 8/11/2014 41.5 540 3rd Qtr 8/11/2014 31.5 1,150
4th Qtr10/21/2014 54.9 596 4th Qtr10/21/2014 35.7 1,050
1st Qtr 3/9/2015 69.2 675 1st Qtr 3/9/2015 34.6 944
2nd Qtr6/8/2015 47.1 390 2nd Qtr 6/8/2015 ’31.8 1290
3rd Qtr8/31/2015 64.7 557 3rd Qtr8/11/2015 25.3 788
4th Qtr10/19/2015 56.1 567 4th Qtr10/19/2015 29.6 909
1st Qtr 3/9/2016 31.1 583 1st Qtr 3/9/2016 989
2nd Qtr5/23/2016 2nd Qtr 5/23/2016 771
TW4-25 (Pumping well starting in January 2013)Pond D
Monitoring Event Nitrate, Nitrate +Chloride (mg/I)Monitoring Event Nitrate, Nitrate +Chloride (mg/I)
Nitrite (mg/I)Nitrite (mg/I)
1st Qtr 2/11/2013 ....................9 190 u)lst Qtr 1/31/2011 0.1 3
2nd Qtr6/5/2013 5.24 ...........................136
3rd Qtr9/3/2013 5.69 119
4th Qtr10/29/2013 6.1 88.6
1st Qtr 1/27/2014 2.16 85.7
2nd Qtr 5/19/2014 ''1.21 .........................51.1
3rd Qtr 8/11/2014......................... 1.6 ......................67
4th Qtr10/21/2014 1.03 58.1
1st Qtr 3/9/2015 14.4 310
2nd Qtr 6/8/2015 1.14 ...~
3rd Qtr 8/31/2015 1.63
4th Qtr10/21/2015 1.78 93.7
1st Qtr 3/9/2015 0.837 62.7
2nd Qtr 5/23/2016 0.959 75.5
1. Only sample collected.
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
Table 2
Summary of QA/QC Duplicate Sample
1st Quarter 2016
Parameter GWQS Duplicate of TWN-1
TWN-1 TWN-65 RPD
Nitrate + Nitrite (as N)10 mg/L 1.51 1.67 -10.1
Chloride none 30.3 30.3 0.0
2nd Quarter 2016
| Parameter GWQS Duplicate of TWN-18
TWN-18 TWN-65 RPD
Nitrate + Nitrite (as N)10 mg/L 0.497 0.486 2.2
Chloride none 69.9 69.4 0.7
label 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
1st Quarter 2016
Data Discriptions Chloroform Pumping Wells Nitrate Pumping Wells
MW4 MW-26 TW4-1 TW4-2 TW4-4 TW4-11 TW4-19 TW4-20 TW4-21 TW4-37 TWN-2 TW4-22 TW4-24 TW4-25
Nitrate (mg/L)
Nitrate (g/L)
Nitrate (Ibs/L)
Nitrate (Ibs/gal)
Total gallons pumped
lbs of nitrate removed
Gallons of nitrate removed
5.2
5.15E-03
1.14E-05
4.31 E-05
90,882
3.91
0.32
1.45
1 45E-03
3.20E-06
1.21 E-05
19,151
0.23
0.02
0.148
1.48E-04
3.27E-07
1.24E-06
19,256
0.02
0.00
5.3
5.30E-03
1.17E-05
4.43E-05
20,945
0.93
0.08
6.71
6.71 E-03
1.48E-05
5.61 E-05
57,274
3.21
0.26
7.13
7.13E-03
1.58E-05
5.96E-05
3,676
0.22
0.02
15.7
1.57E-02
3.47E-05
1.31E-04
116,597
15.31
1.25
10.3
1.03E-02
2.28E-05
8.61 E-05
14,354
1.24
0.10
14.6
1 46E-02
3.23E-05
1.22E-04
125,513
15.32
1.25
28.3
2.83E-02
6.25E-05
2.37E-04
111,591
26.41
2.15
86.3
8.63E-02
1.91E-04
7.22E-04
47,670
34.40
2.80
31.1
3.11E-02
6.87E-05
2.60E-04
24,518
6.38
0.52
29.1
2.91 E-02
6.43E-05
2.43E-04
100,063
24.35
1.98
0.84
8.37E-04
1.85E-06
7.00E-06
115,483
0.81
0.07
Total lbs of nitrate removed from pumping wells inside nitrate plume 123.41
Total gallons of nitrate removed from pumping wells inside nitrate plume10.04
Total lbs of nitrate removed from pumping wells outside nitrate plume 9.34
Total gallons of nitrate removed from pumping wells outside nitrate plume0.74
Total lbs nitrate removed from all pumping wells 132.75
Total gallons of nitrate removed from all pumping wells 10.78
% lbs of nitrate removed by pumping wells inside nitrate plume 92.96
2nd Quarter 2016
Data Discriptions Chloroform Pumping Wells Nitrate Pumping Wells
MW4 MW-26 TW4-1 TW4-2 TW4-4 TW4-11 TW4-19 TW4-20 TW4-21 TW4-37 TWN-2 TW4-22 TW4-24 TW4-25
Nitrate (mg/L)4.5 1.12 0.138 5.67 6.56 7.81 1.27 11.2 13.1 27.9 45.4 58.4 24.2 0.959
Nitrate (g/L)4.54E-03 1.12E-03 1.38E-04 5.67E-03 6.56E-03 7.81 E-03 1.27E-03 1.12E-02 1.31 E-02 2.79E-02 4.54E-02 5.84E-02 2.42E-02 9.59E-04
Nitrate (Ibs/L)1.00E-05 2.47E-06 3.05E-07 1.25E-05 1.45E-05 1.73E-05 2.81 E-06 2.47E-05 2.89E-05 6.16E-05 1.00E-04 1.29E-04 5.35E-05 2.12E-06
Nitrate (Ibs/gal)3.80E-05 9.37E-06 1.15E-06 4.74E-05 5.49E-05 6.53E-05 1.06E-05 9.37 E-05 1.10E-04 2.33E-04 3.80E-04 4.88E-04 2.02E-04 8.02E-06
Total gallons pumped 96,541 22,106 19,588 20,624 61,378 3,760 123,768 15,818 132,249 119,241 50,783 26,506 65,234 125,606
lbs of nitrate removed 3.67 0.21 0.02 0.98 3.37 0.25 1.31 1.48 14.49 27.82 19.28 12.95 13.20 1.01
Gallons of nitrate removed 0.30 0.02 0.00 0.08 0.27 0.02 0.11 0.12 1.18 2.26 1.57 1.05 1.07 0.08
Total lbs of nitrate removed from pumping wells inside nitrate plume 90.53
Total gallons of nitrate removed from pumping wells inside nitrate plume 7.37
Total lbs of nitrate removed from pumping wells outside nitrate plume 9.49
Total gallons of nitrate removed from pumping wells outside nitrate plume 0.75
Total lbs nitrate removed from all pumping wells 100.03
Total gallons of nitrate removed from all pumping wells 8.12
% lbs of nitrate removed by pumping wells inside nitrate plume90.5l|