DRC-2017-003304 - 0901a068806f43bc

State of Utah
GARY R. HERBERT
Governor
SPENCERJ COX
Lieutenant Governor
Department of
Environmental Quality
Alan Matheson
Executive Director
DIVISION OF WASTE MANAGEMENT
AND RADIATION CONTROL
Scott T. Anderson
Director
J>RC'£011-00 3304-
MEMORANDUM
TO:
FROM:
DATE:
Phil Goble
Dean Henderson
May 3, 2017
SUBJECT: Review of the 3rd Quarter and 4th 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
November 17, 2016, White Mesa Uranium Mill 3rd Quarter, 2016 Nitrate Monitoring Report (“3rd
Quarter, 2016”) and the February 22, 2016, White Mesa Uranium Mill 4th Quarter, 2016 Nitrate
Monitoring Report (“4th 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 3rd Quarter, 2016 and the 4th 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, TWN-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 3A.
For both the 3rd Quarter, 2016 and the 4th Quarter, 2016 the monitoring wells were purged using the
three approved QAP well purging strategies and meet QAP requirements for each strategy:
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 [phone]
vnmu.deq.utnh.gov
Printed on 100% recycled paper
Page 2
1. Purging two casing volumes with stable field parameters for specific conductivity,
turbidity, pH, 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 pH, 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 3 rd Quarter, 2016 and the 4th Quarter, 2016 the method holding times for each parameter for
samples collected at each monitor well were received and analyzed within the required holding times in
the QAP.
Receipt Temperature
For both the 3rd Quarter, 2016 and the 4th Quarter, 2016 all samples were received within the required
QAP temperature limit of 6° C.
Detection Limits
For both the 3rd Quarter, 2016 and the 4th Quarter, 2016 all sample sets were measured and reported to
the required QAP reporting limits.
Sample Duplicates
For the 3rd 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 4th 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).
Groundwater Head Monitoring
For both the 3rd Quarter, 2016 and the 4th Quarter, 2016 depth to groundwater was measured in the
following wells and/or piezometers as required in Part I.E.3 of the Permit:
Page 3
• 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 A, P-4 and P-5.
• 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 3rd Quarter, 2016 and the 4th Quarter, 2016 reports reported an estimated 101.35 lbs. and 106.27
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, TW4-37, and TW4-39 [4th quarter 2016]) and the nitrate
pumping wells (TWN-2, TW4-22, TW4-24, and TW4-25). For the 3rd Quarter, 2016 of the 101.35 lbs.
removed approximately 91.7 lbs. or 90%, was removed by the pumping wells inside the nitrate plume.
For the 4th Quarter, 2016 of the 106.27 lbs. removed approximately 98.45 lbs. or 93%, 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:
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;
Page 4
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 3rd Quarter, 2016 and the 4th 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, TW4-37, and TW4-39 the Nitrate Plume is being
captured.
Conclusions on Compliance with the CAP. QAP
Per the Division review it appears that both the 3rd Quarter 2016 Nitrate Monitoring Report and the 4th
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
Report, November 17, 2016.
Energy Fuels Resources (USA) Inc., White Mesa Uranium Mill
Report February 22, 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
3rd Quarter, 2016 Nitrate Monitoring
4th Quarter, 2016 Nitrate Monitoring
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 well starting in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/l)Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010 0.5 17 1st Qtr 3/24/2010 62.1 85
2nd Qtr5/26/2010 0.6 20 2nd Qtr 6/2/2010 69 97
3rd Qtr 9/27/2010 0.6 19 3rd Qtr 9/29/2010 69 "71" 104
4th Qtr 12/7/2010 0.6 14 4th Qtr12/9/2010 48 93
1st Qtr 1/26/2011 0.5 17 1st Qtr 2/1/2011 43 93
2nd Qtr4/20/2011 0.5 19 2nd Qtr4/28/2011 40 85
3rd Qtr 7/26/2011 0.5 14 3rd Qtr 7/28/2011 33 74
4th Qtr 10/17/2011 0.5 10 4th Qtr 10/20/2011 33 76
1st Qtr 1/9/2012 0.6 15 1st Qtr 1/12/2012 31 86
2nd Qtr 4/18/2012 0.6 17 2nd Qtr 4/20/2012 48 103
3rd Qtr 7/24/2012 0.6 17 3rd Qtr 7/31/2012 54 1" 171 93
4th Qtr 10/17/2012 0.43 17.5 4th Qtr 7/17/2012 22.10 79
Nitrate Pumping System Started in January 2013
1st Qtr 2/18/2013 ..........................0.68 17.6 1st Qtr 2/19/2013 57.3 ...........................80.5
2ndQtr4/23/2013 ..........................0.84 17.4 2nd Qtr 4/24/2013 57.7 .............................82.1
3rd Qtr 8/27/2013 1.24 24.1 3rd Qtr 8/27/2013 80.0 75.9
4th Qtr10/16/2013 1.61 26.8 4th Qtr 7/16/2013 111 70.4
1st Qtr 1/14/2014 1.47 29.2 1st Qtr 1/13/2014 42.6 ..................72.4
2nd Qtr 5/6/2014 ..........................1.63 31.1 2nd Qtr 5/7/2014 44.7 84.9
3rd Qtr 8/5/2014 1.7 28 3rdQtr8/6/2014 42.0 80
4th Qtr10/8/2014 1.46 27.6 4th Qtr 10/8/2014 71 81
1st Qtr 2/18/2015 1.37 27.8 1st Qtr 2/18/2015 r 5 «.6 87.8
TWN-65 dup of TWN-1 ..........................1.41 29.0
2nd Qtr 5/13/2015 0.65 29.2 2nd Qtr 5/12/2015 52.8 83.6
3rd Qtr 8/25/2015 0.624 33.2 3rd Qtr8/25/2015 49.7 87.8
4th Qtr 10/13/2015 1.35 27.7 4th Qtr 10/14/2015 45 74.9
1st Qtr 2/23/2016 ................1.51 30.3 1st Qtr 2/23/2016 86.3 73.9
2nd Qtr 5/17/2016 1.73 32.1 2nd Qtr 5/17/2016 45.4 74.5
3rd Qtr 7/20/2016 1.76 29.6 3rd Qtr 7/20/2016 35.3 68.8
4th Qtr10/6/2016 1.98 33 4th Qtr 10/11/2016 32.6 69.8
Monitoring Event
TWN-3
Monitoring Event
TWN-4
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/25/2010 25.3 111 1st Qtr 3/16/2010 0.9 22
2nd Qtr 6/3/2010 26 118 2nd Qtr 5/27/2010 1.0 - 22
3rd Qtr 7/16/2010 27 106 3rd Qtr 9/27/2010 0.9 19
4th Qtr12/10/2010 24 117 4th Qtr 12/8/2010 1.0 21
1st Qtr 2/1/2011 24 138 1st Qtr 1/25/2011 0.9 21
2nd Qtr4/28/2011 26 .................128 2nd Qtr 4/20/2011 °-9 21
3rd Qtr 7/29/2011 25 134 3rd Qtr 7/26/2011 1.1 35
4th Qtr 10/20/2011 25 129 4 th Qtr10/18/2011 0.9 20
1st Qtr 1/12/2012 25 143 1st Qtr 1/9/2012 0.9 20
2nd Qtr4/20/2012 24 152 2nd Qtr 4/18/2012 1.1 24
3rd Qtr 7/31/2012 27 ............158 3rd Qtr 7/25/2012 .....................1.4 ........."is
4th Qtr10/17/2012 12.1 149 4th Qtr 7/15/2012 1.45 26.4
Nitrate Pumping System Started in January 2013 !
1st Qtr 2/19/2013 22.2 157 1st Qtr 2/18/2013 1.5 .............................25.3
2nd Qtr4/24/2013 27.2 158 2nd Qtr 4/23/2013 !.63 24.4
3rd Qtr 8/28/2013 20.9 171 3rd Qtr 8/27/2013 1.6 27.2
4th Qtr10/17/2013 .. 23,5 163 4th Qtr 7/16/2013 1.69 29.4
1st Qtr 1/15/2014 19.6 160 1st Qtr 1/14/2014 1.4 28.4
2nd Qtr 5/7/2014 23.6 168 2nd Qtr 5/6/2014 ' "' " i,6 ' „ 29-6
3rd Qtr 8/6/2014 19.5 .....................174 3rdQtr8/5/2014 " 28
4th Qtr10/9/2014 19.1 153 4th Qtr 10/8/2014 1.44 30.7
1st Qtr 2/19/2015 19.4 164 1st Qtr 2/18/2015 1.48 31.5
2nd Qtr 5/14/2015 17.2 141 2nd Qtr 5/13/2015 0.733 31.9
3rd Qtr 8/26/2015 16.2 156 3rd Qtr 8/25/2015 0.974 35.2
TWN-65 dup of TWN-4 1.160 35.2
4th Qtr 10/14/2015 16.3 129 4th Qtr 10/13/20115 1.58 28.4
1st Qtr 2/24/2016 16.8 128 1st Qtr 2/23/2016 2.02 30.7
2nd Qtr5/18/2016 13.5 116 2nd Qtr5/17/2016 2.97 31.7
3rd Qtr7/20/2016 16.8 110 3rd Qtr 7/20/2016 3.14 28.0
4th Qtr 10/7/2016 15.8 113 4th Qtr10/6/2016 3.09 31.3
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 1.4 22
3rd Qtr 7/12/2010 0.3 43 3rd Qtr7/13/2010 1.4 73
4th Qtr 12/7/2010 0.3 45 4th Qtr12/7/2010 1.2 21
1st Qtr1/25/2011 0.4 47 1st Qtr 1/26/2011 1.1 18
2nd Qtr 4/20/2011 0.3 44 2ndQtr4/20/2011 1.5 22
3rd Qtr7/26/2011 0.3 44 3rd Qtr 7/27/2011 ................1.1 17
4th Qtr 10/17/2011 0.3 45 4th Qtr 10/18/2011 1.4 21
1st Qtr 1/9/2012 0.2 45 1st Qtr 1/10/2012 1.2 20
2nd Qtr 4/18/2012 0.3 ............. 39 2nd Qtr 4/18/2012 1.1 22
3rd Qtr 7/24/2012 0.3 48 3rd Qtr7/25/2012 1.4 22
4th Qtr 10/15/2012 <0.1 43.5 4th Qtr 7/15/2012 0.78 20.4
1st Qtr 2013 NA 1st Qtr 2013 NA
2nd Qtr2013 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
Monitoring Event
TWN-8
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010 0.8 6 1st Qtr 3/16/2010 <0.1 11
2nd Qtr 5/28/2010 1.2 6 2nd Qtr 5/26/2010 <0.1 11
3rd Qtr 7/14/2010 1.8 7 3rd Qtr 7/12/2010 <0.1 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 13
2nd Qtr 4/21/2011 1.7 .......................................6 2nd Qtr 4/19/2011 <0.1.............................10
3rd Qtr 7/29/2011 0.7 5 3rd Qtr7/26/2011 <0.1 18
4th Qtr10/19/2011 2.2 6 4th Qtr 10/17/2011 <0.1 10
1st Qtr 1/11/2012 2.3 5 1st Qtr 1/9/2012 <0.1 11
2nd Qtr4/20/2012 1.2 6 2nd Qtr 4/18/2012 <0.1 ....... 15
3rd Qtr 7/26/2012 0.9 6 3rd Qtr 7/24/2012 <0.1 11
4th Qtr 10/16/2012 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
4thQtr 10/16/2013 0.986 5.7
1st Qtri/15/26l4 ......6.882 ......5.75
2nd Qtr 5/7/2014 0.564 5.26
3rd 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 Qtr5/14/2015 0.779 6.18
3rd Qtr 8/6/2015 0.348 6.12
4th Qtr 10/14/2015 0.672 5.84
1st Qtr 2/24/2016 0.24 6.06
2nd Qtr 5/18/2016 0.732 6.26
3rd Qtr 7/21/2016 0.81 5.97
4th Qtr 10/7/2016 0.698 6.17
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/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
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 Qtr 12/8/2010 1.3 28
1st Qtr 2/1/2011 9.5 217 1st Qtr 1/26/2011 0.3 40
2nd Qtr 4/28/2011 10.0 192 2nd Qtr 4/21/2011 1.2 28
3rd Qtr 7/29/2011 11.0 208 3rd Qtr 7/27/2011 0.1 28
4th Qtr10/20/2011 10.9 134 4th Qtr 10/18/2011 0.2 33
1st Qtr 1/12/2012 12.2 202 1st Qtr 1/10/2012 0.8 44
2nd Qtr 4/20/2012 10.6 209 2nd Qtr4/19/2012 0.9 28
3rd Qtr7/31/2012 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/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010 1.4 73 1st Qtr 3/17/2010 0.7 113
2nd Qtr 6/1/2010 1.3 72 2nd Qtr 5/26/2010 0.8 106
3rd Qtr 9/27/2010 1.4 76 3rd Qtr 7/12/2010 0.7 112
4th Qtr 12/8/2010 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
2ndQtr 4/26/2011 1.4 ..............76 2nd Qtr4/26/2011 1.0 109
3rd Qtr 7/27/2011 0.1 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 Qtr 4/19/2012 1.6 71 2nd Qtr 4/18/2012 7.1.2 106
3rd Qtr 7/25/2012 1.8 77 3rd Qtr 7/25/2012 1.4 102
4th Qtr 10/16/2012 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 Qtr 2013 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.
Monitoring Event
TWN-13
Monitoring Event
TWN-14
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/l) 11
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 Qtr 4/26/2011 <0.!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 Qtr 4/18/2012 <0.1 53 2nd Qtr 4/20/2012 3.4 27
3rd Qtr 7/24/2012 0.1 48 3rd Qtr7/27/2012 3.7 27
4th Qtr10/15/2012 <0.1 47.3 4th Qtr 7/17/2012 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 NA
3rd Qtr 2015 NA
4th Qtr 2015 NA
1st Qtr 2016 NA
2nd Qtr 2016 NA________________
3rd Qtr 2016
4th Qtr 2016
Monitoring Event
TWN-15
Monitoring Event
TWN-16
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
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 Qtr 9/27/2010 "2.6 35
4th Qtr12/9/2010 1.2 38 4th Qtr12/9/2010 2 30
1st Qtr1/27/2011 1.4 43 1st Qtr 1/27/2011 4.6 34
2nd Qtr 4/27/2011 1.6 49 2nd Qtr 4/27/2011 1.6 39
3rdQtr 7/28/2011 1.6 47 3rd Qtr7/27/2011 2.4 31
4th Qtr 10/19/2011 1.3 38 4th Qtr 10/18/2011 2.6 34
1st Qtr 1/11/2012 1.5 38 1st Qtr1/10/2012 2.8 33
2nd Qtr 4/20/2012 ' 1.6 46 2nd Qtr 4/19/2012 2.0 50
3rd Qtr7/26/2012 2.1 50 3rd Qtr7/25/2012 2.4 33
4th Qtr 10/17/2012 1.79 47 4th Qtr7/16/2012 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 I
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
2nd Qtr 2016 NA
3rd Qtr 2015 NA
4th Qtr 2015 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 Nitrate, 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 Qtr 6/1/2010 , 1.8 63
3rd Qtr 7/15/2010 8.9 66 3rd Qtr 9/27/2010 1.8 64
4th Qtr 12/10/2010 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 Qtr 4/26/2011 1.8 67
3rd Qtr7/29/2011 8.5 74 3rd Qtr 7/28/2011 1.8 65
4th Qtr 10/20/2011 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 Qtr 4/20/2012 9.1 80 2nd Qtr4/19/2012 2.1 64
3rd Qtr 7/27/2012 9.5 85 3rd Qtr 7/26/2012 2.3 67
4th Qtr 10/17/2012 9.65 84.8 4th Qtr 7/16/2012 1.95 67.5
Nitrate Pumping System 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 64.3
3rd Qtr 2013 NA 3rd Qtr 8/27/2013 204 70.4
TWN-17 abandoned on July 31, 2013 4th Qtr 10/16/2013 2.15 67.3
1st Qtr /14/2014 2.33 68.4
2nd Qtr 5/6/2014 2.18 76.5
3rd Qtr 8/5/2014 1.8 70
4th Qtr10/8/2014 1.47 74.8
1st Qtr 2/18/2015 1 73.3
2nd Qtr 5/13/2015 1.35 76.6
TW4-65 dup of TWN-18 <0.10 76.9
3rd Qtr8/25/2015 0.35 81.3
4th Qtr 10/13/2015 0.668 69
TWW5 dup of TWN-18 0.645 68.6
1st Qtr 2/23/2016 0.648 67.6
2nd Qtr5/17/2016 0.497 69.9
3rd Qtr 7/21/2016 <0.100 52.7
4th Qtr 10/6/2016 0.501 67.4
TWN-19
Monitoring Event
Upper Wildlife Pond (UMLP)
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/23/2010 7.2 118 1st Qtr 3/18/2010 <0.1 <1.0
2nd Qtr 6/1/2010 6.2 ........................113 2nd Qtr 6/2/2010 <0.1.............................<1.0
3rd Qtr9/27/2010 7.2 113 3rd Qtr 7/19/2010 <0.1 <1.0
4th Qtr12/9/2010 7.0 107 4th Qtr12/10/2010 <0.1 1
1st Qtr 2/1/2011 7.0 114 1st Qtr 1/31/2011 0.1 1
2nd Qtr 4/28/2011 6.9 120 2nd Qtr4/25/2011 <0.1 <1.0
3rd Qtr 7/28/2011 7.1 113 3rd Qtr 7/25/2011 <0.1 <1.0
4th Qtr 10/18/2011 6.5 108 4th Qtr 10/19/2011 <0.1 <L0.......................
1st Qtr 1/10/2012 7.0 114 1st Qtr T/3T/2OI2 o.i .i
2nd Qtr 4/19/2012 . 6.8 117 Pond no longer in service
3rd Qtr7/26/2012 .....7.5 117
4th Qtr 10/16/2012 7.7 ...................................118
1st Qtr 2013 NA
2nd Qtr 2013 NA
3rd Qtr 2013 NA
4th Qtr 2012 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
list Qtr 2016 NA
Pnd 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
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 2ndQtr6/2/2010 0.6 8
3rd Qtr7/19/2010 6.8 52 3rd Qtr7/19/2010 0.6 8
4th Qtr 12/10/2010 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 Qtr 4/25/2011 6.8 58 2nd Qtr 4/25/2011 0.3 8
3rdQtr 7/25/2011 7 53 3rd Qtr7/25/2011 0.1 9
4th Qtr 10/19/2011 6.6 55 4th Qtr 10/19/2011 0.1 8
1st Qtr1/11/2012 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 Qtr 4/20/2012 6.6 58 2nd Qtr 4/20/2012 0.2 8
3rd Qtr 7/27/2012 7.2 56 3rd Qtr 7/27/2012 0.2 9
4th Qtr 10/17/2012 7.66 55 4th Qtr 7/17/2012 0.19 9.5
Nitrate Pumping System Started in January 2013
1st Qtr 2/19/2013 ”8.11 56.7 1st Qtr 2/19/2013 0.22 9.67
2nd Qtr 4/24/2013 8.88 53.3 2nd Qtr 4/24/2013 0172 10.3
3rd Qtr 8/28/2013 7.83 55.1 3rd Qtr 8/28/2013 0.198 9.66
4th Qtr10/16/2013 6.68 54.1 4th Qtr10/16/2013 0.36 9.22
1st Qtr 1/13/2014 6.79 56.2 1st Qtr1/13/2014 0.169 11.4
2nd Qtr 5/7/2014 7.57 ' ' 52.1 2nd Qtr5/7/2014 0.736 11.4
3rd Qtr 8/6/2014 " 5.1 " 55 3rd Qtr 8/6/2014 0.8 ................................12
4th Qtr 10/8/2014 5.75 57.6 4th Qtr 10/8/2014 0.755 12.2
1st Qtr 2/18/2015 6.41 55.9 1st Qtr 2/18/2015 0.749 125
2nd Qtr 5/12/2015 5.95 57.5 2nd Qtr5/12/2015 0.646 13.1
3rd Qtr8/26/2015 4.96 64.2 3rd Qtr 8/6/2015 0.7 15.5
4th Qtr 10/14/2015 6.17 54.4 4th Qtr10/14/2015 0.692 13.3
1st Qtr 2/23/2016 8.31 56.5 1st Qtr 2/23/2016 0.615 13.4
2nd Qtr 5/12/2016 6.33 59.1 2nd Qtr 5/12/2016 0.665 14
3rd Qtr 7/19/2016 6.78 53.9 3rd Qtr 7/19/2016 0.669 12.4
4th Qtr 10/11/2016 6.42 58.1 4th Qtr 10/11/2016 0.732 13.4
Monitoring Event
PIEZ-3 PIEZ-3A
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010 1.7 116
2nd Qtr6/2/2010 1.6 ! ' 36
3rdQtr 7/19/2010 1.8 35
4th Qtr 12/9/2010 1.8 25
1st Qtr 1/31/2011 1.8 40
2nd Qtr 4/25/2011 1.7 35
3rd Qtr 7/25/2011 1.8 61
4th Qtr 10/19/2011 1.7 12
1st Qtr 1/11/2012 1.8 20
2nd Qtr4/20/2012 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 Qtr 4/24/2013 1.83 21.2
3rd Qtr 8/28/2013 1.81 22.4
4th Qtr 10/16/2013 ______ 1.8 23.5
1st Qtr 1/13/2014......1.7 26
2nd Qtr 5/7/2014 1.79 23.9
3rd Qtr8/6/2014 1.7 .............................26
4th Qtr 10/8/2014 ......... 1.74 28.3
1st Qtr 2/18/2015 .....1.82 ......27.3
2nd Qtr 5/12/2015 1.75 30.2
3rd Qtr 8/26/2015 1.87 54.8
4th Qtr10/14/2015 2.24 39.5
1st Qtr 2/23/2016 1.82 27.3
PIEZ-3 abandonded May 2016 Ul2nd Qtr 5/12/2016 8.33 109
3rd Qtr 7/19/2016 8.83 93.8
4th Qtr 10/11/2016 8.44 100
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 Monitoring Event
TW4-24 (Pumping well stating in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)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 Qtr 9/3/2013 29.7 487 3rd Qtr 9/3/2013 32.6 998
4th Qtr 10/29/2013 ............._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 Qtr 5/19/2014 47.2 614 2nd Qtr 5/19/2014 35 1,020
3rd Qtr8/11/2014 41.5 540 3rd Qtr 8/11/2014 31.5 1,150
4th Qtr 10/21/2014 54.9 596 4th Qtr 10/21/2014 35.7 1,050
1st Qtr 3/9/2015 69.2 675 1st Qtr 3/9/2015 34.6 944
2nd Qtr 6/8/2015 47.1 390 2nd Qtr 6/8/2015 31.8 1290
3rd Qtr 8/31/2015 64.7 557 3rd Qtr8/11/2015 25.3 788
4th Qtr10/19/2015 56.1 567 4th Qtr 10/19/2015 29.6 909
1st Qtr 3/9/2016 31.1 583 1st Qtr 3/9/2016 29.1 989
2nd Qtr 5/23/2016 58.4 598 2nd Qtr 5/23/2016 24.2 771
3rd Qtr 7/25/2016 61.3 619 3rd Qtr 7/25/2016 34.4 1180
4th Qtr 10/12/2016 6i rs 588 4th Qtr 10/12/2016 ................... 31.9 1010
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 (1|lst Qtr 1/31/2011 0.1 3
2nd Qtr 6/5/2013 ...........................5.24 136
3rd Qtr 9/3/2013 '' 5.69 119
4thQtr 10/29/2013 6.1 88.6
1st Qtr 1/27/2014 2.16 85.7
2nd Qtr5/19/2014 1.21 51.1
3rd Qtr 8/11/2014 .............................1.6 .....................................67
4th Qtr 10/21/2014 1.03 58.1
1st Qtr 3/9/2015 144 310
2nd Qtr 6/8/2015 1.14 ...............58.3
3rd Qtr 8/31/2015 1.63 69.2
4th Qtr 10/21/2015 1.78 93.7
1st Qtr 3/9/2015 0.837 62.7
2nd Qtr 5/23/2016 0.959 75.5
3rd Qtr7/25/2016 1.78 74.1
4th Qtr 10/12/2016 1.24 59.8
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
3rd Quarter 2016
Parameter GWQS Duplicate of TWN-1
TWN-1 TWN-65 RPD
Nitrate + Nitrite (as N) 10 mg/L 1.76 1.78 -1.1
Chloride none 29.6 29.7 -0.3
4th Quarter 2016
Parameter GWQS Duplicate of TWN-18
TWN-18 TWN-65 RPD
Nitrate + Nitrite (as N) 10 mg/L 0.501 0.488 2.6
Chloride none 67.4 65.7 2>1
Tabel 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
3rd Quarter 2016
Data Discriptions Chloroform Pumping Wells |! Nitrate Pumping Wells i
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)5.0 1.57 5.490 4.07 7.22 8.83 10.5 11.3 16.5 33.4 35.3 61.3 34.4 1.78
Nitrate (g/L)4.95E-03 1.57E-03 5.49E-03 4.07E-03 7.22E-03 8.83E-03 1.05E-02 1.13E-02 1.65E-02 3.34E-02 3.53E-02 6.13E-02 3.44E-02 1.78E-03
Nitrate (Ibs/L)1.09E-05 3.47E-06 1.21E-05 8.99E-06 1.60E-05 1.95E-05 2.32E-05 2.50E-05 3.65E-05 7.38E-05 7.80E-05 1.35E-04 7.60E-05 3.93E-06
Nitrate (Ibs/gal)4.14E-05 1.31E-05 4.59E-05 3.40E-05 6.04E-05 7.38E-05 8.78E-05 9.45E-05 1.38E-04 2.79E-04 2.95E-04 5.13E-04 2.88E-04 1.49E-05
Total gallons pumped 79,786 17,150 15,614 17,487 50,104 2,954 103,609 12,187 110,382 98,378 42,330 22,144 51,766 104,984
lbs of nitrate removed 3.30 0.23 0.72 0.60 3.03 0.22 9.10 1.15 15.23 27.48 12.50 11.35 14.89 1.56
Gallons of nitrate removed 0.27 0.02 0.06 0.05 0.25 0.02 0.74 0.09 1.24 2.24 1.02 0.92 1.21 0.13
llTotal lbs of nitrate removed from pumping wells inside nitrate pi ume 91.70
Total gallons of nitrate removed from pumping wells inside nitrate plume 7.46
Total lbs of nitrate removed from pumping wells outside nitrate plume 9.65
Total gallons of nitrate removed from pumping wells outside nitrate plume 0.77
llTotal lbs nitrate removed from all pumping wells 101.35
Total gallons of nitrate removed from all pumping wells 8.23
||% lbs of nitrate removed by pumping wells inside nitrate plume 90.48
4th Quarter 2016
Data Discriptions Chloroform Pumping Wells ji Nitrate Pumping Wells i
MW4 MW-26 TW4-1 TW4-2 TW4-4 TW4-11 TW4-19 TW4-20 TW4-21 TW4-37 TW4-39 TWN-2 TW4-22 TW4-24 TW4-25
Nitrate (mg/L) 4.9 1.18 0.746 6.07 6.77 8.92 10.00 11.2 13.5 26.1 20.7 32.6 61.5 31.9 1.240
Nitrate (g/L)4.88E-03 1.18E-03 7.46E-04 6.07E-03 6.77E-03 8.92E-03 1.00E-02 1.12E-02 1.35E-02 2.61 E-02 2.07E-02 3.26 E-02 6.15E-02 3.19E-02 1.24E-03
Nitrate (Ibs/L)1.08E-05 2.61 E-06 1.65E-06 1.34E-05 1.50E-05 1.97E-05 2.21 E-05 2.47E-05 2.98E-05 5.77E-05 4.57E-05 7.20E-05 1.36E-04 7.05E-05 2.74E-06
Nitrate (Ibs/gal)4.08E-05 9.87E-06 6.24E-06 5.08E-05 5.66E-05 7.46E-05 8.36E-05 9.37E-05 1.13E-04 2.18E-04 1.73E-04 2.73E-04 5.14E-04 2.67E-04 1.04E-05
Total gallons pumped 85,414 18,542 16,757 19,741 31,656 3,050 104,919 12,880 130,311 101,949 3,589 44,641 23,647 99,523 98,681
lbs of nitrate removed 3.49 0.18 0.10 1.00 1.79 0.23 8.77 1.21 14.71 22.25 0.62 12.17 12.16 26.55 102IlGallons of nitrate removed 0.28 0.01 0.01 0.08 0.15 0.02 0.71 0.10 1.20 1.81 0.05 0.99 0.99 2.16 o.osll
Total lbs of nitrate removed from pumping wells inside nitrate plume 98.45
Total gallons of nitrate removed from pumping wells inside nitrate plume^DlTotal gallons of nitrate removed from pumping wells inside nitrate plume8.01
Total lbs of nitrate removed from pumping wells outside nitrate plume 7.82
Total gallons of nitrate removed from pumping wells outside nitrate plume0.62
Total lbs nitrate removed from all pumping wells 106.27
Total gallons of nitrate removed from all pumping wells 8.63
% lbs of nitrate removed by pumping wells inside nitrate plume 92.6411