DRC-2017-009167 - 0901a0688077fa36

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
TO:
FROM:
DATE:
MEMORANDUM
Phil Goble
Dean Henderson
November 13, 2017
DRC-ZOiy-OO^lfc
SUBJECT: Review of the 2nd Quarter 2017 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
August 21, 2017 2nd Quarter 2017 White Mesa Uranium Mill Nitrate Monitoring Report (“Report”) 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, August 15, 2072, Revision. 7.3 (“QAP”)
REVIEW
Monitor Well Sampling
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.
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. (801) 5364414
mtnu.deq utah.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
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
All samples were received within the required QAP temperature limit of 6° C.
Detection Limits
All sample sets were measured and reported to the required QAP reporting limits.
Sample Duplicates
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).
Groundwater Head Monitoring
For the 2nd Quarter, 2017 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 A, P-4 and P-5.
• MW-20, MW-22 and MW-34
• Nitrate monitoring wells.
Page 3
• 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
The Report estimated 80 lbs. 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) and the nitrate
pumping wells (TWN-2, TW4-22, TW4-24, and TW4-25). Of the 80 lbs. removed approximately 73
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
The 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;
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
Page 4
e) Copies of EFR field reports, laboratory reports, arid 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
The 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 Report 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 the 2nd Quarter 2017 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 2nd Quarter, 2017 Nitrate Monitoring
Report, August 21, 2017.
Energy Fuels Resources (USA) Inc., August 15, 2017, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assurance Plan (Revision 7.3).
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.
TWN-1 TWN-2 (Pumping well starting in January 2013)
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 0.5 17 1st Qtr 3/24/2010
....... ....„
62.1 ......................85
2nd Qtr 5/26/2010 0.6 20 2nd Qtr 6/2/2010 1 69 97
3rd Qtr 9/27/2010 0.6 19 3rd Qtr 9/29/2010 ..........; ' '69 104
4th Qtr 12/7/2010 0.6 14 4th Qtr 12/9/2010 48 93
1st Qtr 1/26/2011 0.5 17 1st Qtr 2/1/2011 ; 43 93
2nd Qtr 4/20/2011 0.5 19 2nd Qtr 4/28/2011 _ j 40 .riirzi i.85
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
0.5
0.5
.................. ...... 14
10
3rd Qtr 7/28/2011
4th Qtr 10/20/2011 .........i
33
33
74
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 !i' 48 103
3rd Qtr 7/24/2012 0.6 17 3rd Qtr 7/31/2012 54 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
2nd Qtr 4/23/2013 _................ 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 Qtr 10/16/2013 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 Qtr5/6/2014 1,63 31.1 2nd Qtr5/7/2014 44.7 84.9
3rd Qtr 8/5/2014 1.7 28 3rd Qtr 8/6/2014 42.0 80
4th Qtr 10/8/2014 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 48.6 87.8
TWN-65 dup of TWN-1 1.41 ..............29.0
2nd Qtr5/13/2015 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 ■ s-;-/:" ■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 Qtr 10/6/2016 1.98 33 4th Qtr 10/11/2016 32.6 69.8
1st Qtr 2/15/2017 2.06 31.2 1st Qtr 2/15/2017 27.4 65.8
: TWN-65 dup of TWN-1 _ _ 1,98 31.5
2nd Qtr 6/1/2017 1.89 32.7 2nd Qtr 6/1/2017 Li_____!25.01 61.5|
Monitoring Event
1st Qtr 3/25/2010
2nd Qtr6/3/2010
3rd Qtr 7/16/2010
4th Qtr 12/10/2010
TWN-3
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
24
111
118
106
117
Monitoring Event
1st Qtr 3/16/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4th Qtr 12/8/2010
TWN-4
Nitrate, Nitrate +
Nitrite (mg/I)
0.9i.6
0.9
1.0
Chloride (mg/I)
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
—
138
128
134
129
1st Qtr 1/25/2011
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4th Qtr 10/18/2011
0.9
0.9
1.1
0.9
1st Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4th Qtr 10/17/2012
143
152
158
149
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr 7/15/2012
0.9
1.1
1.4
1.45
Nitrate Pumping System Started in January 2013
20
24
25
26.4
1st Qtr 2/19/2013
2nd Qtr4/24/2013
3rd Qtr 8/28/2013 4th Qtr i6/17/2013
1st Qtr 1/15/2014 2nd Qtr 5/7/2014 '
3rd Qtr 8/6/2014
4th Qtr 10/9/2014
1st Qtr 2/19/2015
2nd Qtr 5/14/2015
3rd Qtr 8/26/2015
4th Qtr 10/14/2015 16.3 129
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
3rd Qtr 8/27/2013
4th Qtr7/16/2013
1st Qtr 1/14/2014
2nd Qtr 5/6/2014
3rdQtr 8/5/2014
4th Qtr 10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/13/2015
3rdQtr8/25/2015
7WN-65 dup of TWN-4
4th Qtr 10/13/20115
1.5
1.63
1.6
1.69
1.4
1.6
2.0
1.44
1.48
0.733
0.974
1.160
1.58
25.3
24.4
27.2
29.4
28.4
29.6
28
30.7
31.5
31.9
35.2
35.2
28.4
1st Qtr 2/24/2016
2nd Qtr 5/18/2016
3rd Qtr 7/20/2016
13.5
128
116
1st Qtr 2/23/2016
2nd Qtr 5/17/2016
2.02
2.97
16.8 110
4th Qtr 10/7/2016 psiiasaffii
3rd Qtr 7/20/2016 3.14
113 4th Qtr 10/6/2016 3.09
1st Qtr 2/16/2017
2nd Qtr 6/2/2017
113
108
1st Qtr 2/15/2017
2nd Qtr 6/1/2017
2.63
2.4
30.7
31.7
28.0
31.3
31.2
28.6
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 TWN-6
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event 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 Qtr 7/13/2010 1.4 73
4th Qtr 12/7/2010 0.3 45 4th Qtr 12/7/2010 1.2 21
1st Qtr 1/25/2011 0.4 47 1st Qtr 1/26/2011 1.1 18
2nd Qtr 4/20/2011 0.3 44 2nd Qtr 4/20/2011 15 22
3rd Qtr 7/26/2011 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 Qtr 7/25/2012 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 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
2nd Qtr 2016 NA 1
3rd Qtr 2016 NA . . |
4th Qtr 2016 NA
1st Qtr 2017 NA 1
2nd Qtr 2017 NA 1!
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 H
2nd Qtr 5/28/2010 1.2 6 2nd Qtr 5/26/2010 <0.1 1!
3rd Qtr 7/14/2010 1.8 7 3rd Qtr 7/12/2010 <0.1 11
4th Qtr 12/10/2010 1 4 4th Qtr 12/7/2010 <0.1 9
1st Qtr 1/27/2011 ................... 13 ............................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 Qtr 7/26/2011 <0.1 18
4th Qtr 10/19/2011 ’ 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 n
2nd Qtr 4/20/2012 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 114th Qtr10/16/2012 0 64 5.67 4th Qtr 7/15/2012 <0.1 ’ 11.4
Nitrate Pumping Systemi Started in January 2013
1st Qtr 2/19/2013 0.59 5.68 1st Qtr 2013 NA
2nd Qtr 4/24/2013 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 Qtr 10/16/2013 0.986 5 7
1st Qtr 1/15/2014 ..................0.882 5.75
2nd Qtr 5/7/2014 0.564 5.263rd Qtr 8/6/2014'0.9 6
4th Qtr 10/9/2014 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 Qtr 10/14/2015 0.672 5 84i’st'Qtr 2/2472016’""....................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
1st Qtr 2/16/2017 1 63 14.02nd Qtr 6/2/2017 '3 74 29.7
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.
TWN-9 TWN-10
Monitoring Event Nitrate, Nitrate +Chloride (mg/I)Monitoring Event Nitrate, Nitrate +Chloride (mg/I)
Nitrite (mg/I)Nitrite (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 Qtr 12/9/2010 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 wmmm,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 Qtr 10/20/2011 10.9 134 4th Qtr 10/18/2011 0.2 33
1st Qtr 1/12/2012 202 1st Qtr 1/10/2012 0.8 44
2nd Qtr4/20/2012 . r : i ;209 2nd Qtr 4/19/2012 0.9 28
3rd Qtr 7/31/2012 ............ ...215 3rd Qtr 7/25/2012 0.6 33
4th Qtr 10/17/2012 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 July31, 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 Qtr 12/7/2010 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 76 2nd Qtr 4/26/2011 io 109
3rd Qtr 7/27/2011 0.1 76 3rd Qtr 7/26/2011 ........................0.6 102
4th Qtr 10/17/2011 1.6 76 4th Qtr 10/17/2011 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 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/l)
Chloride (mg/l)Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
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 Qtr 12/7/2010 0.4 57 4th Qtr 12/10/2010 4.2 28
1st Qtr 1/25/2011 1.6 103 1st Qtr 1/28/2011 3.7 24
2nd Qtr 4/26/2011 <0.1 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 Qtr 10/17/2011 <0.1 48 4th Qtr 10/19/2011 '3.9 27
1st Qtr 1/9/2012 <01 46 1st Qtr 1/11/20:2 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 Qtr 7/27/2012 3.7 27
4th Qtr 10/15/2012 <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 NA
4th Qtr 2016 NA
1st Qtr 2017 NA
2nd Qtr 2017 NA
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 5/28/2.010 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 Qtr 12/9/2010 1.2 38 4th Qtr 12/9/2010 2 30
1st Qtr 1/27/2011 ......................1.4 43 1st Qtr 1/27/2011 4.6 34
2nd Qtr 4/27/2011 L6 49 2nd Qtr 4/27/2011 1.6 39
3rd Qtr 7/28/2011 1.6 47 3rd Qtr 7/27/2011 2.4 ... 314th Qtr 10/19/2011 1.3 38 4th Qtr 10/18/2011 2 6 34
Ist Qtr 1/11/2012 1.5 38 1st Qtr 1/10/2012 2.8 33
2nd Qtr 4/20/2012 1.6 46 2nd Qtr 4/19/2012 2.0 50
3rd Qtr 7/26/2012 2.1 50 3rd Qtr 7/25/2012 2.4 33
4th Qtr 10/17/2012 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 NA
2nd Qtr 2016 NA
3rd Qtr 2015 NA
4th Qtr 2015 NA
1st Qtr 2017 NA
2nd 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 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 Qtr 12/9/2010 1.6 59
1st Qtr 2/1/2011 8.6 .....90 1st Qtr 1/27/2011 ...................1.4 61
2nd Qtr 4/28/2011 9 81 2nd Qtr 4/26/2011 1.8 67
3rd Qtr 7/29/2011 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 Qtr 4/19/2012 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 Systemi Started in January 2013
1st Qtr 2013 NA....1st Qtr 2/18/2013 1.21 68.7
2nd Qtr 2013 NA 2nd Qtr 4/23/2013 232 64.3
3rd Qtr 2013 NA 3rd Qtr 8/27/2013 2.04 70.4
TWN-17 abandoned on July 31, 2013 4th Qtr 10/16/2013 2.15 67.3
1st Qtr 2/14/2014 2.33 68.4
2nd Qtr 5/6/2014 2.18 76.5
3rd Qtr 8/5/2014 1.8 70
4th Qtr 10/8/2014 1.47 74.8
1st Qtr 2/18/2015 1 73.3
2nd Qtr 5/13/2015 1.35 76.6
"nAI4-65 dup of 7WN-18 <0.10 76.9
3rd Qtr 8/25/2015 3' °:35 81.3
4th Qtr 10/13/2015 0.668 69
TV/4-65 dup of 7WN-18 0.645 68.6
1st Qtr 2/23/2016 0.648 67.6
2nd Qtr 5/17/2016 0.497 69.9
3rd Qtr 7/21/2016 <0.100 52.7
4th Qtr 10/6/2016 0.501 67.4
1st Qtr 2/15/2017 0.47 62.1
2nd Qtr 6/1/2017 0.392 63.9
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
.....................7.2
7.2
7.0
...................... 118
113
1st Qtr 3/18/2010
2nd Qtr 6/2/2010
<0.1
<0.1
<1.0
<1.0.....................
<1.0
1
3rd Qtr 9/27/2010
4th Qtr 12/9/2010
113
107
3rd Qtr 7/19/2010 ..
4th Qtr 12/10/2010
<0.1
<0.1
1st Qtr 2/1/2011
2nd Qtr 4/28/2011 3rd Qtr 7/28/2011 '
4th Qtr 10/18/2011
7.0.....6.9
" 7.1
6.5
114
120
US
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
0.1
<0.1
<0.1
1
<1.0
<1.0
108 4th Qtr 10/19/2011 <0.1 <1.0
1st Qtr 1/10/2012 7.0 114 1st Qtr 1/31/2012 0.1 1
2nd Qtr 4/19/2012
3rd Qtr 7/26/2012
4th Qtr 10/16/2012
.............6.8
.....................7.5
7.7
......................117
117
118
Pond no longer in service
1st Qtr 2013
2nd Qtr 2013
3rd Qtr 2013 ’'
4th Qtr 2012
NA
NA........................................................NA ‘..................................................
NA
1st Qtr 2014
2nd Qtr 2014
3rd Qtr 2014
4th 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
3rd Qtr 2016
NA___________
NA
NA
4th Qtr 2016 NA
1st Qtr 2017
2nd Qtr 2017
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
PlEZ-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 Qtr 7/19/2010 "0.6 8
4th Qtr 12/10/2010 6.5 60 4th Qtr 12/10/10 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
3rd Qtr 7/25/2011 7 53 3rd Qtr 7/25/2011 0.1 9
4th Qtr 10/19/2011 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 91st 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 °-2 8
3rd Qtr 7/27/2012 7.2 56 3rd Qtr 7/27/2012 . . °-2 9
4th Qtr 10/17/2012 7.66 55 4th Qtr 7/17/2012 0.19 ..................... 9.5
Nitrate Pumping Systemi 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 0.172 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 Qtr 10/16/2013 0.36 ....................9.22
1st Qtr 1/13/2014 6‘79 56.2 1st Qtr 1/13/2014 "0169 11.4
2nd Qtr 5/7/2014 1.S1 521 2nd Qtr 5/7/2014 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 6.4!55.9 1st Qtr 2/18/2015 "" .........0”749 12.5
2nd Qtr 5/12/2015 5.95 57.5 2nd Qtr 5/12/2015 0.646 13.1
3rd Qtr 8/26/2015 4.96 64.2 3rd Qtr 8/6/2015 0.7 15.5
4th Qtr 10/14/2015 6.17 54 4 4th Qtr 10/14/2015 0.692 13 3
1st Qtr 2/23/2016 S-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
1st Qtr 2/15/2017 ............ ' 6.75 54.5 1st Qtr 2/15/2017 " " .........0.696 12.4
2nd Qtr 6/1/2017 ..............6.6 .................54.7 2nd Qtr 6/1/2017 0.345 13 2
Monitoring Event
PIEZ-3 (abandonded May 2016 )
Monitoring Event
PIEZ-3 A
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010 ,1.7 116
2nd Qtr 6/2/2010 1.6 36 i
3rd Qtr 7/19/2010 !.8 , 354thQtr 12/9/2010 1.8 25
1st Qtr 1/31/2011 ” 1.8 40
2nd Qtr 4/25/2011 1.7 35
3rd Qtr7/25/2011 1.8 6!
4th Qtr 10/19/2011 1.7 12
1st Qtr 1/11/2012 .... 1.8 202nd 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 Qtr 10/16/2013 18 23.5
1st Qtr 1/13/2014 1.7 26
2nd Qtr 5/7/2014 1.79 23.9
3rd Qtr 8/6/2014 17 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
_ 224 ___________395
1st Qtr 2/23/2016 ..................182 27.3
PIEZ-3 abandonded May 2016 (1>2nd Qtr 5/12/2016 8.33 109
3rd Qtr 7/19/2016 8.83 93.8
4th Qtr 10/11/2016 8.44 100
1st Qtr 2/15/2017
2nd Qtr 6/1/2017
;?v$£io.o
' *-j*:r* i 4 sV^lO.l
111
124
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)
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 Qtr6/5/2013 50.2 586 2nd Qtr 6/5/2013 23.7 7" 777.77 7?i6
3rd Qtr 9/3/2013 29.7 .. 487 3rd Qtr 9/3/2013.......32.6<v ------------ ,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 Qtr 8/11/2014 41.5 540 3rd Qtr 8/11/2014 .. 31.5 1,150
4th Qtr 10/21/2014 . SI 54.9 596 4th Qtr 10/21/2014 35.7 1,050
1st Qtr 3/9/2015 IP 69.2 675 Ut 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 Qtr 8/11/2015 25.3 788
4th Qtr 10/19/2015 56.1 567 4th Qtr 10/19/2015 29.6 909
1st Qtr 3/9/2016 31.1 583 1st Qtr 3/9/2016 291 .................. 989
2nd Qtr 5/23/2016 58.4 598 2nd Qtr5/23/2016 24.2 " 771
3rd Qtr 7/25/2016 61.3 619 3rd Qtr 7/25/2016 34.4 1180
4th Qtr 10/12/2016 61.5 588 4th Qtr 10/12/2016 31.9 1010
1st Qtr 3/8/2017 69.8 566 1st Qtr 3/8/2017 41.3 1090
2nd Qtr 6/13/2017 70.5 ....572 2nd Qtr 6/13/2017....*'v 39.9 1080
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 “ist Qtr 1/31/2011 0.1 3
2nd Qtr 6/5/2013 5.24 ____________136
3rd Qtr 9/3/2013 5.69 7"..............77...
4th Qtr 10/29/2013 6.1 88.6
1st Qtr 1/27/2014 ; 2.16 ......................a 85.7
2nd Qtr 5/19/2014 .......Hi .....51.1
3rd Qtr 8/11/2014 77777. .7777767
4th Qtr 10/21/2014 1.03 58.1
1st Qtr 3/9/2015 14.4 310
2nd Qtr6/8/2015 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 Qtr 7/25/2016 1.78 74.1
4th Qtr 10/12/2016 1.24 59.8
1st Qtr 3/8/2017 17 285
2nd Qtr 6/13/2017 0.976 69.8
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
2nd Quarter 2017
Parameter GWQS Duplicate of TWN-1
TWN-1 TWN-65 RPD
Nitrate + Nitrite (as N)10 mg/L 1.89 1.88 0.5
Chloride none 32.7 31.5 3.7
label 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
2nd Quarter 2017
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 TW4-39 PTWN-21 TW4-22 TW4-24 TW4-25
Nitrate (mg/L)4 88 0.922 5 74 4.90 7.06 7.92 0.243 9.76 9 53 31.2 6.25 25.0 70 8 39 9 0.976
Nitrate (g/L)4.88E-03 9.22E-04 5.74E-03 4.90E-03 7.06E-03 7.92E-03 2.43E-04 9.76E-03 9.53E-03 3.12E-02 6.25E-03 2.50E-02 7.08E-02 3.99E-02 9.76E-04
Nitrate (Ibs/L)1.08E-05 2 04E-06 1 27E-05 1.08E-05 1.56E-05 1.75E-05 5.37E-07 2.16E-05 2.11E-05 6.89E-05 1.38E-05 5.52E-05 1.56E-04 8 82E-05 2.16E-06
Nitrate (Ibs/gal)4 08E-05 7 71E-06 4.80E-05 4 10E-05 5 90E-05 6.62E-05 2 03E-06 8.16E-05 7.97E-05 2 61E-04 5.23E-05 2.09E-04 5.92E-04 3.34E-04 8.16E-06
Total gallons pumped 72|299.8 25,921 8 18,200.2 18,716 7 23,244 9 2,845.9 109,943.0 12,475.3 60,969.7 93,191.3 41,313.0 42,550.6 23,685.0 52,808.7 101,617 2
lbs of nitrate removed 2.95 0 20 0 87 0.77 1 37 0.19 0 22 1.02 4.86 24.32 . 2 16
.......8.90 .... 14.02 17.62 0.829
Gallons of nitrate removed 0.24 0.02 0.07 0 06 0.11 0.02 0.02 0.08 0.40 1.98 0.18 0.72 1.14 1.43 0 07
Totaljltis ofjhitrate removed;froiffipumping;wellsjinside nitrate plume;^ 'j” ^73.12
Total gallons of nitrate removed from pumping wells inside nitrate plume5.95Total gallons of nitrate removed from pumping wells inside nitrate plume5.95
Total lbs of nitrate removed from pumping wells outside nitrate plume 7.18
Total gallons of nitrate removed from pumping wells outside nitrate plume0.57
Total lbs nitrate removed from all pumping wells 80.30
Total gallons of nitrate removed from all pumping wells 6.52
% lbs of nitrate removed by pumping wells inside nitrate plume91.06