DRC-2015-009906 - 0901a0688061cd7f

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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
PBC-20(=>- OO^^Ofo
MEMORANDUM
TO:Phil Goble Pl&!l/*
FROM:Dean Henderson
DATE: October 27,2015
SUBJECT: Review of the 1st and 2nd Quarter 2015 Nitrate Monitoring Reports 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 May 20,
2015, White Mesa Uranium Mill 1st Quarter 2015 Nitrate Monitoring Report and the August 25,2015
White Mesa Uranium Mill 2nd Quarter 2015 Nitrate Monitoring Report (“Reports”) for the Nitrate
Contamination Investigation.
For the review of these Reports 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, 0212.
• The EFR Quality Assurance Plan, June 7,2012, Revision. 7.2 (“QAP”)
REVIEW
Monitor Well Sampling for the 1st and 2nd Quarter 2015
In each quarter the following monitor wells were sampled and analyzed for inorganic chloride and
nitrate + nitrite (as N) as required in the CAP:
Monitor wells TWN-1, TWN-2, TWN-3, TWN-4, TWN-7, TWN-18, TW4-22, TWN-24, and TWN-25,
and Piezometer 1, Piezometer 2, and Piezometer 3.
In each quarter 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]
www.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 quarter and parameter for samples collected at each monitor well
were received and analyzed within the required holding times in the QAP.
Receipt Temperature
In each quarter all samples were received within the required QAP temperature limit of 6° C.
Detection Limits
In each quarter all sample sets for each were measured and reported to the required QAP reporting
limits.
Sample Duplicates
One duplicate sample was collected for each quarter. All duplicate samples analytical results for the
sample/duplicate pairs were within the 20% acceptance limits as required in the QAP (see Table 2
below).
Groundwater Head Monitoring for 1st and 2nd Quarter 2015
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.
• MW-20, MW-22 and MW-34
Page 3
• 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
The 1st quarter 2015 report reported an estimate of 82 lbs. of nitrate was removed from the chloroform
pumping wells (MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-11, TW4-19, and TW4-20) and the
nitrate pumping wells (TWN-2, TW4-22, TW4-24, and TW4-25). Of the 82 lbs. removed
approximately 67 lbs. or 81%, was removed by the nitrate pumping wells. In the attached Table 3, the
DRC shows calculations that verify these reported estimates.
The 2nd quarter 2015 report reported an estimate of 69 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, TW4-21 and
TW4-37) and the nitrate pumping wells (TWN-2, TW4-22, TW4-24, and TW4-25). Of the 69 lbs.
removed approximately 48 lbs. or 69%, was removed by the nitrate pumping wells. In the Attached
Table 3, the DRC 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;
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
Page 4
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 Chloroform Contaminate Plume and Its Associated Contaminants
Bounding Chloroform Plume
Groundwater monitoring data up to the 2nd quarter 2015 monitoring event 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).
Pumping Wells
Three new pumping wells TW4-1, TW4-2, and TW4-11 started in the 1st quarter 2015 and two new
pumping wells TW4-21 and TW4-37 in the 2nd quarter 2015. Pumping wells TW4-21 and TW4-37
were installed to control and capture chloroform for the chloroform corrective action plan and because
their within in the nitrate plume these wells will also serve to control and capture nitrate.
Conclusions on Compliance with the CAP. OAP
Per the Division review it appears that the 1st and 2nd Quarter 2015 Nitrate Monitoring Reports 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 these reports.
Page 5
References
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 1
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-1
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-2 (Pumping well starting in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
3rd Qtr9/27/2010
0.5 17 1st Qtr 3/24/2010
0.6 20 2nd Qtr 6/2/2010
0.6 19
4th Qtr12/7/2010 0.6 14
3rd Qtr 9/29/2010
4th Qtr 12/9/2010
62.1
...69
69
48
85
97
1st Qtr 1/26/2011
2nd Qtr 4/20/2011
0.5 17 1st Qtr 2/1/2011
0.5 19 2nd Qtr4/28/2011
3rd Qtr 7/26/2011
4th Qtr10/17/2011
0.5 14 3rd Qtr 7/28/2011
0.5 10 4th Qtr 10/20/2011
43
40
33
33
104
93
..93
85
74
76
1st Qtr 1/9/2012 0.6 15 1st Qtr 1/12/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/17/2012
0.6 17 2nd Qtr4/20/2012
0.6 17 3rd Qtr 7/31/2012
0.43
Nitrate
1st Qtr 2/18/2013
2nd Qtr4/23/2013
3rd Qtr 8/27/2013
4th Qtr 10/16/2013
0.68
0.84
1.24
1.61
17.5
Pumping System
4th Qtr 7/17/2012
Started in January 2013
31
48
54
22.10
86
103
93
79
17.6
17.4
24.1
26.8
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/27/2013
4th Qtr 7/16/2013
57.3
57.7
80.0
111
80.5
82.1
75.9
70.4
1st Qtr 1/14/2014 1.47
2nd Qtr 5/6/2014
3rd Qtr 8/5/2014
1.63
1.7
29.2
31.1
4th Qtr 10/8/2014 1.46
....28
27.6
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr 10/8/2014
42.6
44.7
42.0
71
72.4
84.9
80
1st Qtr 2/18/2015
TWN-65 dup of TVI/N-1
2nd Qtr 5/13/2015
1.37
1.41
0.65
27.8
29.0
29.2
1st Qtr 2/18/2015 48.6
81
87.8
2nd Qtr 5/12/2015 52.8 83.6
Monitoring Event
TWN-3
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)Monitoring Event
TWN-4
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/25/2010
2nd Qtr 6/3/2010
3rd Qtr 7/16/2010
4th Qtr12/10/2010
25.3
26
27
24
111 1st Qtr 3/16/2010
118 2nd Qtr 5/27/2010
0.9
1.0
22
22
106 3rd Qtr 9/27/2010
117 4th Qtr12/8/2010
0.9
1.0
19
21
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
24
26
25
25
138 1st Qtr 1/25/2011
128 2nd Qtr 4/20/2011
0.9
0.9
134 3rd Qtr 7/26/2011
129 4th Qtr 10/18/2011
1.1
0.9
21
21
35
20
1st Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4th Qtr 10/17/2012
25
24
27
12.1
143 1st Qtr 1/9/2012
152 2nd Qtr 4/18/2012
0.9
1.1
20
158 3rd Qtr 7/25/2012
149 4th Qtr 7/15/2012
1.4
1.45
24
....25
26.4
Nitrate Purnping Systern Started in January 2013
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr10/17/2013
22.2
27.2
20.9
23.5
157
158
171
163
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
3rd Qtr 8/27/2013
4th Qtr 7/16/2013
1.5
1.63
1.6
1.69
25.3
24.4
27.2
29.4
1st Qtr 1/15/2014
2nd Qtr 5/7/2014
3rd Qtr 8/6/2014
4th Qtr10/9/2014
19.6
23.6
19.5
19.1
160
168
174
1st Qtr 1/14/2014
2nd Qtr 5/6/2014
3rd Qtr8/5/2014
1.4
1.6
28.4
29.6
153 4th Qtr 10/8/2014
2.0
1.44
28
30.7
1st Qtr 2/19/2015
2nd Qtr 5/14/2015
19.4
17.2
164
141
1st Qtr 2/18/2015
2nd Qtr 5/13/2015
1.48
0.733
31.5
31.9
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/I
Table 1 of 2
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
TWN-5
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
TWN-6
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/16/2010 0.3
[2nd Qtr 5/26/2010 0.3
43
44
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 7/13/2010
1.5
1.4
19
22
3rd Qtr 7/12/2010 0.3
4th Qtr 12/7/2010 0.3
43
45
1st Qtr 1/2572611
4th Qtr12/7/2010
lstQtr'l/26720iT'
1.4
1.2
73
21
0.4 47
44
1.1
1.5
18
222nd Qtr 4/20/2011 0.3 2nd Qtr 4/20/2011
3rd Qtr 7/26/2011 0.3
4th Qtr 10/17/2011 0.3
44
45
3rd Qtr 7/27/2011
4th Qtr i6/18/26i i 1.1
1.4
17
21
1st Qtr 1/9/2012 0.2
2nd Qtr4/18/2012 0.3
45
39
1st Qtr 1/10/2012
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr7/15/2012
1.2
1.1
20
22
3rd Qtr 7/24/2012 0.3 48
43.5
1.4
0.78
22
20.44th Qtr 10/15/2012 <0.1
1st Qtr 2013 NA 1st Qtr 2013
2nd Qtr 2013
3rd Qtr 2613 "
NA
NA2nd Qtr 2013 NA
TWN-5 abandoned on July 31,2013
4th Qtr 2013
NA
NA
1st Qtr 2014
2nd Qtr 2014
3rd Qtr 2014
NA
NA
NA
4th Qtr 2014 NA
1st Qtr 2015
2nd Qtr 2015
NA
NA
Monitoring Event
TWN-7
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I) Monitoring Event
TWN-8
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010 0.8 1st Qtr 3/16/2010 <0.1 11
112nd Qtr 5/28/2010
3rd Qtr 7/14/2010
1.2 2nd Qtr 5/26/2010 <0.1
1.8 3rd Qtr 7/12/2010 <0.1 11 ...94th Qtr 12/10/2010 4th Qtr12/7/2010 <0.1
1st Qtr 1/27/2011
2nd Qtr 4/21/2011
1.3 1st Qtr 1/25/2011 <0.1
1.7 2nd Qtr4/19/2011 <0.1
13
10
183rd Qtr 7/29/2011
4th Qtr 10/19/2011
0.7
2.2
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
<0.1<6.1 10
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/26/2012
4th Qtr 16/16/2612
2.3
1.2
1st Qtr 1/9/2012 <0.1
2nd Qtr 4/18/2012 <0.1
0.9
0.64
6
867
3rd Qtr 7/24/2012 <0.1
4th Qtr 7/15/2012 <0.1
11
15
11
11.4
1st Qtr 2/19/2013 0.59 5.68 1st Qtr 2013 NA
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr 10/16/2013
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
1.16 5.88 2nd Qtr 2013 NA
0.835 6.96 TWN-8 abandoned on July 31,2013
0.986 5.7
0.882 5.75
0.564 5.26
0.9
0.968 5.93
1.04 5.58
0.779 6.18
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 1 of 3
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-9
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event TWN-10
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/23/2010 7.6 183
175
1st Qtr 3/23/2010 1.5 54
302nd Qtr 6/1/2010
3rd Qtr 7/15/2010
4th Qtr12/9/2010
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
7.7
10.7
8.0
..9.5
10.0
11.0
10.9
2nd Qtr 6/2/2010
210
172
3rd Qtr 7/14/2010
4th Qtr 12/8/2010
217
192
1st Qtr 1/26/2011
2nd Qtr 4/21/2011
208
134
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
1.0
0.2
1.3
0.3
1.2
0.1
0.2
21
28
40
28
28
33
1st Qtr 1/12/2012
2nd Qtr4/20/2012
3rd Qtr 7/31/2012
4th Qtr10/17/2012
12.2
10.6
12.3
12.5
202
209
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
215
194
3rd Qtr 7/25/2012
4th Qtr 7/16/2012
0.8
0.9
0.6
0.12
44
28
...33
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
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event TWN-12
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/17/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
1.4
1.3
73
72
76
1st Qtr 3/17/2010 0.7 113
106
1.4
1.4
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
0.8
0.7 112
1034th Qtr12/8/2010 72 4th Qtr12/7/2010 0.7
1st Qtr 1/27/2011
2nd Qtr4/26/2011
1.4
1.4
84 1st Qtr 1/26/2011 4.2 87
109
102
87
3rd Qtr 7/27/2011
4th Qtr10/17/2011
0.1
1.6
76
76
2nd Qtr 4/26/2011
3rd Qtr 7/26/2011
1.0
0.6
76 4th Qtr 10/17/2011 1.2
1st Qtr 1/10/2011 1.6
1.6
69
71
1st Qtr 1/10/2012 0.9 104
106
102
101
2nd Qtr 4/19/2012
3rd Qtr 7/25/2012
4th Qtr10/16/2012
2nd Qtr 4/18/2012 1.2
1.8
1.84
77
76.4
3rd Qtr 7/25/2012 1.4
4th Qtr 7/16/2012 1.41
1st Qtr 2013
2nd Qtr 2013
NA 1st Qtr 2013 NA
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 1 of 4
Historic Nitrate, Nitrate + Nitrite and Cioride 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/I)
1st Qtr 3/17/2010 <0.1
2nd Qtr 5/26/2010
3rd atr 9/27/2610
4th Qtr 12/7/2010
0.1
47
49
1st Qtr 3/24/2010
0.2 53
57
2nd Qtr 6/2/2010
3rd Qtr 7/15/2010
4th Qtr 12/10/2010
2.9
2.9
3.5
4.2
24
30
26
280.4
1st Qtr 1/25/2011
2nd Qtr 4/26/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
1.6 103
49
1st Qtr 1/28/2011
2nd Qtr 4/27/2011
3rd Qtr 7/29/2011
3.7
3.5
24
30<0.1
0.1 49
48
3.5
3.9
25
27<0.1 4th Qtr 10/19/2011
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
<0.1 46
53
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3.5
3.4
26
27<0.1
0.1 48
473
3rd Qtr 7/27/2012
4th Qtr 7/17/2012
3.7
4.03
27
27.44th Qtr 10/15/2012 <0.1
1st Qtr 2013 NA 1st Qtr 2013 NA
2nd Qtr 2013 NA
TWN-13 abandoned on July 31,2013
2nd Qtr 2013
3rd Qtr 2013
NA
NA
4th Qtr 2013 NA
1st Qtr 2014 NA
2nd Qtr 2014
3rd Qtr 2014 ’
NA
NA
4th Qtr 2014 NA
1st Qtr 2015 2nd Qtr 2015"NA
NA
Monitoring Event TWN-15
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event TWN-16
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/18/2010
2nd Qtr 5/28/2010
0.7 43
39
1st Qtr 3/17/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4th Qtr 12/9/2010
1.2
1.3
35
351.0
3rd Qtr 7/13/2010 1.0
i4th Qtr 12/9/2010 1.2
36
38
2.6
....2 35
30
1st Qtr 1/27/2011
2nd Qtr 4/27/2011
1.4 43
49
1st Qtr I/27/29II
2nd Qtr 4/27/2011
3rd Qtr 7/27/2011
4.6
1.6
34
391.6
3rd Qtr 7/28/2011
4th Qtr 10/19/2011
1.6 47
38
2.4
2.6
31
341.3 4th Qtr 10/18/2011
1st Qtr 1/11/2012 1.5 38
46
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
2.8
2.0
33
50
....33
32.1
2nd Qtr 4/20/2012
3rd Qtr 7/26/2012
4th Qtr10/17/2012
1.6
2.1 50
47
3rd Qtr 7/25/2012
4th Qtr 7/16/2012
2.4
2.501.79
1st Qtr 2013
2nd Qtr 2013
NA 1st Qtr 2013
2nd Qtr 2013
NA
NANA
TWN-15 abandoned on July 31,2013 3rd Qtr 2013
4th Qtr 2013
NA
NA
1st Qtr 2014
2nd Qtr 2014
NA
NA
3rd Qtr 2014
4th Qtr 2014
NA
NA
1st Qtr 2015
2nd Qtr 2015
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
Table 1 of 5
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-17
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event TWN-18
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010
2nd Qtr 6/3/2010
10.4 78 1st Qtr 3/17/2010
3rd Qtr 7/15/2010 8.9
87
66
2nd Qtr 6/1/2010
4th Qtr12/10/2010 65
3rd Qtr 9/27/2010
4th Qtr12/9/2010
1.6
1.8
1.8
1.6
42
63
64
59
1st Qtr 2/1/2011 8.6 90 1st Qtr 1/27/2011 1.4
1.8
61
672nd Qtr4/28/2011 81 2nd Qtr 4/26/2011
3rd Qtr 7/29/2011 8.5 74 3rd Qtr 7/28/2011 1.8
1.9
65
604th Qtr 10/20/2011 8.1 71 4th Qtr 10/18/2011
1st Qtr 1/12/2012 8.7 79 1st Qtr 1/10/2012 1.9
2.1
64
642nd Qtr 4/20/2012 9.1 80 2nd Qtr4/19/2012
3rd Qtr 7/27/2012 9.5 85 3rd Qtr 7/26/2012 2.3
1.95
67
67.54th Qtr10/17/2012 9.65 84.8 4th Qtr 7/16/2012
Nitrate Pumping System Started in January 2013
1st Qtr 2013
2nd Qtr 2013
NA
NA
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
3rd Qtr 8/27/2013
4th Qtr 10/16/2013
2.27
2.32
68.7
64.3
3rd Qtr 2013 NA
TWN-17 abandoned on July 31, 2013
1st Qtr /14/2014
2nd Qtr 5/6/2014
3rd Qtr 8/5/2014
4th Qtr10/8/2014
1st Qtr 2/18/2015
2nd Qtr 5/13/2015
TW4-65 dup of TW4-18 <0.10
2.04
2.15
2.33
2.18
1.8
1.47
1
1.35
70.4
67.3
68.4
76.5
70
74.8
73.3
76.6
76.9
Monitoring Event TWN-19
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event Upper Wildlife Pond (UMLP)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
7.2
6.2
118
113
1st Qtr 3/18/2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
<0.1
<0.1
<1.0
<1.0
<1.07.2
7.0
113
107
<0.1
<0.14th Qtr12/9/2010 4th Qtr12/10/2010
1st Qtr 2/1/2011
2nd Qtr4/28/2011
7.0
6.9
114
120
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
0.1
<0.1
<0.1
<0.1
<1.0
<1.0
<1.0
3rd Qtr 7/28/2011
4th Qtr 10/18/2011
7.1
6.5
113
108
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
1st Qtr 1/10/2012 7.0
6.8
114
117
1st Qtr 1/31/2012 0.1
2nd Qtr 4/19/2012
3rd Qtr 7/26/2012
2nd Qtr 2012
3rd Qtr 2012
NS
NS
NS
NS
NS
7.5
7.7
117
1184th Qtr 10/16/2012 4th Qtr 2012 NS
1st Qtr 2013 NA
NA
1st Qtr 2013 NA
2nd Qtr 2013
3rd Qtr 2013
4th Qtr 2012
NA
NA
2nd Qtr 2013
3rd Qtr 2013
NA
NA
4th Qtr 2012 NA
1st Qtr 2014 NA 1st Qtr 2014 NA
2nd Qtr 2014
3rd Qtr 2014
4th Qtr 2014
NA
NA
NA
2nd Qtr 2014
3rd Qtr 2014
4th Qtr 2014
NA
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 1 of 6
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event Piezometer 1
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event Piezometer 2
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 2010 NS
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/10/2010
NS 1st Qtr 2010 NS
7.2 52 2nd Qtr 6/2/2010
NS
0.6
0.6
0.2
6.8
6.5
52
60
3rd Qtr 7/19/2010
4th Qtr 12/10/10 6
9
_ 8
...9
8
9' 1
'*8
ZA
9.5
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
3rd Qt r 7/25/2011
4th Qtr 10/19/2011
60 1st Qtr 1/31/2011
6.8
6.6
58
J53
55
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
0.3
0.3
0.1
0.1
1st Qtr 1/11/2012
1st Qtr 1/10/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 10/17/2012
7.1 78 1st Qtr 1/11/2012
7.0
6.6
7.2
114
" 58
..56
1st Qtr 1/31/2012
2nd Qtr4/20/2012
3rd Qtr 7/27/2012
0.1
0.1
...0.2
0.2
0.197.66 55 4th Qtr 7/17/2012
Nitrate Pumping System StartedJinJanuary 2013
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2013
4th Qtr10/16/2613
8.11
8.88
7.83
56.7
53.3
55.1
1st Qtr 2/19/2013
2nd Qtr4/24/2013
3rd Qtr 8/28/2013
4th Qtr 10/16/2013
0.22
0.172
6.198
9.67
10.3
9.66
9.226.68 54.1 0.36
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
3rd Qtr8/6/2014
6.79 56.2 1st Qtr 1/13/2014
2nd Qtr 5/7/2614
3rd Qtr 8/6/2014
0.169 11.4
11.47.57
5^1
52.1
55
0.736
0.8 12
12.24th Qtr 10/8/2014 5.75 57.6 4th Qtr 10/8/2014 0.755
1st Qtr 2/18/2015
2 n d Qt r 5 /12/ 2 015
6.41
5.95
55.9
57.5
1st Qtr 2/18/2015
2nd Qtr 5/12/2015
0.749
0.646
12.5
13.1
Monitoring Event Piezometer 3
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event Pond D
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 3/24/2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
1.7 116 1st Qtr 2010 NS NS
NS
NS
NS
1.6 36 2nd Qtr 2010 NS
4th Qtr 12/9/2010
1.8
1.8
35
25
3rd Qtr 2010 NS
4th Qtr 2010 NS
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
1.8 40 1st Qtr 1/31/2011 0.1
1.7 35 2nd Qtr 2011 NS NS
NS
NS
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
1.8 61 3rd Qtr 2011 NS
1.7 12 4th Qtr 2011 NS
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 16/17/2612
1.8
1.7
1.8
20
53
21
1st Qtr 2012
2nd Qtr 2012
3rd Qtr 2012
NS
NS
NS
NS
NS
NS
NS2.75 20.1 4th Qtr 2012 NS
Nitr.3te_.Pu_.mping System Started in January 2013
1st Qtr 2/24/2013
2nd Qtr 4/24/2013
3rd Qtr 8/28/2613
1.85 21 1st Qtr 2013 NA
1.83
1.81
21.2
22.4
2nd Qtr 2013
3rd Qtr 2013
NA
NA
4th Qtr 10/16/2013 1.8 23.5 4th Qtr 2013 NA
1st Qtr 1/13/2014
2nd Qtr 5/7/2014
1.7 26 1st Qtr 2014 NA
1.79
..1.7
23.9
....26
2nd Qtr 2014
3rd Qtr 2014
NA
NA3rd Qtr 8/6/2014
4th Qtr 10/8/2014 1.74 28.3 4th Qtr 2014 NA
1st Qtr 2/18/2015
2nd Qtr 5/12/2015
1.82
1.75
27.3
30^2
1st Qtr 2015
2nd Qtr 2015
NA
NA
NS = Not sampled
NA = Per the CAP and SCO, these wells not sampled 2013
Table 1 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)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
Monitoring Event TW4-24 (Pumping well stating in January 2013)
Nitrate, Nitrate +
Nitrite (mg/I)
Chloride (mg/I)
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
3rd Qtr 9/3/2013
4th Qtr10/29/2013
58
50.2
29.7
45.2
635
586
487
501
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
3rd Qtr 9/3/2013
4th Qtr10/3/2013
35.9
23.7
32.6
34.6
596
916
998
1,030
1st Qtr 1/27/2014
2nd Qtr 5/19/2014
3rd Qtr 8/11/2014
4th Qtr 10/21/2014
54.6
47.2
41.5
54.9
598
614
1st Qtr 1/27/2014
2nd Qtr5/19/2014
540
596
3rd Qtr 8/11/2014
4th Qtr 10/21/2014
31.6
35
31.5
35.7
809
1,020
1,150
1,050
1st Qtr 3/9/2015
2nd Qtr 6/8/2015
69.2
47.1
675
390
1st Qtr 3/9/2015
2nd Qtr 6/8/2015
34.6
31.8
944
1290
Monitoring Event TW4-25 (Pumping well starting in January 2013)
Nitrate, Nitrate +
Nitrite (mg/l)
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
3rd Qtr 9/3/2013
9
5.24
4th Qtr10/29/2013
5.69
6.1
1st Qtr 1/27/2014
2nd Qtr5/19/2014
2.16
1.21
3rd Qtr 8/11/2014
4th Qtr 10/21/2014
1st Qtr 3/9/2015
2nd Qtr 6/8/2015
1.6
1.03
1.14
Chloride (mg/l)
190
136
119
88.6
85.7
51.1
....67
58.1
310
58.3
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 2
Summary of QA/QC Duplicate Sample
1st Quarter 2015
Parameter GWQS Duplicate of TWN-1
TWN-1 TWN-65 RPD
Nitrate + Nitrite (as N)10 mg/L 27.8 29 -4.2
Chloride none 1.37 1.41 -2.9
2nd Quarter 2015
Parameter GWQS Duplicate of TWN-18
TWN-18 TWN-65 RPD
Nitrate + Nitrite (as N)10 mg/L 1.35 <0.10 NC
Chloride none 76.6 76.9 -0.4
NC= not calculated
Tabel 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
1st Quarter 2015
Data Discriptions
MW4 MW-26 TW4-1
ChlorofomPumgingWeJIs
TW4-2 TW4-4 TW4-11 7W4-19 TW4-20 TWN-2
NitrateJ^um|imgJWeN8
TW4-22 TW4-24 TW4-25
Nitrate (mg/L)5.8 0.7 7.1 5.3 7.7
7.70E-03
1.70E-05
8.7 8.6 9.8 48.6 69.2 34.6 14.4
Nitrate (g/L)5.80E-03 7.32E-04 7.10E-03 5.30E-03 8.70E-03
1.92E-05
7.28E-05
8.56E-03
1.89E-05
7AQE-05
9.80E-03
2.17E-05
8.20E-05
4.86E-02
1.07E-04
4.06E-04
6.92E-02
1.53E-04
5.79E 04
3.46E-02
7.64E-05
2.89E-04
1.44E-02
3.18E-05
T20E-04
Nitrate (Ibs/L)1.28E-05 1.62E-06 1.57E-05 1.17E-05
Nitrate (Ibs/gal)4.85E-05 6.12E-06 5.94E-05 4.43E-05 6.44E-05
....36'941
..........2.4
Total gallons pumped 76,454 24,005 24,569 24,157
......1.1
0.09
9,899
....0.7
0.06
60,553.......4.3
0.35
15,745.......1.3
0.10
47,262.....19.2
.....1.56
22,047
.....12.8
.....1.04
92,449
.....26.8
2.18
71,452
.......8.6
0.70
lbs of nitrate removed 3.7 0.15 1.5
Gallons of nitrate removed 0.30 0.01 0.12 0.19
Total lbs of nitrate removed from chloroform pumping wells
Total gallons of nitrate removed chloroform pumping welis
15.1
1.2
Total lbs of nitrate removed from nitrate pumping wells
Total gallons of nitrate removed nitrate pumping wells
67.3
5.5
Total lbs nitrate removed from all pumping wells
Total gallons of nitrate removed from ail pumping wells
%Jbs_of^itrateiremoved_b^=nitrate_pumgin£wens___e__=i
82.4
......6.7
81.7
2nd Quarter 2015
Data Discriptions
MW4 MW-26 TW4-1
Chloroform Pumping Wells
TW4-2 TW4-4 TW4-11 TW4-19 TW4-20 TW4-21 TW4-37 TWN-2
Nitrate Pumping Wells
TW4-22 TW4-24 TW4-25
Nitrate (mg/L)2.5 0.4 6.1 4.3
4.30E-03
9!50E-06
6.3
6!30E-03
1.39E-05
8.5
8.50E-03
1.88E-05
0.9
9.16E-04
2.02E-06
5.76
5.76E-03
13.1
T31E-62
2.89E-05
35.2
3.52E-02
7.78E-05
52.8
5.28E-02
1.17E-04
47.1 31.8 1.1
1.14E-03
2.52E-06
Nitrate (g/L)2.50E-03 4.19E-04 6.10E-03
Nitrate (Ibs/L)5.52E-06 9.26E-07 1.35E-05 1.27E-05
4.82E-05
.....18,754
.........0.90
0.07
4.71 E-02
1.04E-04
3.94E-04
3.18E-02
7.03E-05
Nitrate (Ibs/gal)2.09E-05 3.50E-06 5.10E-05 3.60E-05
....22,030
........0J9
0.06
5.27E-05
....69,229
........3.65
7.11E-05
......5,243
........0.37
0.03
7.66E-06
....75,103
........0.58
0.05
1.10E-04
....30,744
........3.37
0.27
2.94E-04
....29,206
........&60
070
4.42E-04
....48,497
......21.41
........1.74
2.66E-04....62,664
......16.66
.........1.316
9.53E-06 ....91,985
.....a’88
.........0.07
Total gallons pumped 60,715 27,805 23,990
lbs of nitrate removed 1.27 0.10 1.22
Gallons of nitrate removed 0.10 0.01 0.10 0.30
23,192
.....9.13
0.74
Total lbs of nitrate removed from chloroform pumping wells
Total gallons of nitrate removed chloroform pumping wells 20.8
0.7
Total lbs of nitrate removed from nitrate pumping wells
Total gallons of nitrate removed nitrate pumping wells
48.1
3.9
Total lbs njtrate removed from all pumping wells
Total gallons of nitrate removed from all pumping wells
%Jbsofnitrate>remwedby_nitratejgumgm£wens!=__^=>=_=
68.9
....4.6
69.8