DRC-2013-003183 - 0901a068803beb72

State of Utah
Department of
Environmental Quality
Amanda Smith
Executive Director
DIVISION OF RADIATION CONTROL
Rusty Lundberg
Director
II DRC-2013-003183 II
GARY R. HERBERT
Governor
GREG BELL
Lieutenant Governor
MEMORANDUM
TO: Phil Goble 1/&l/&€>ty
FROM:
DATE: September 20,2013
SUBJECT: Review of the 2nd Quarter 2013 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 Radiation Control ("DRC") has reviewed the August 26,2013, White Mesa Uranium
Mill 2nd Quarter 2013 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")
• The EFR Quality Assurance Plan, June 7,2012, Revision. 7.2 ("QAP")
REVIEW
Monitor Well Sampling ^
The following monitor wells were sampled as required in the CAP (see Table 1 below):
TWN-1, TWN-2, TWN-3, TWN-4, TWN-7, TWN-18, TW4-22. TWN-18, TWN-22, TWN-24, TWN-25,
Piezometer 1, Piezometer 2, and Piezometer 3.
The following 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, 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:
195 North 1950 West • Salt Lake City, UT
Mailing Address. P.O. Box 144850 • Salt Lake City, UT 84114-4850
Telephone [phone] • Fax [phone] • T D D [phone]
www deq Utah gov
Printed on 100% recycled paper \
Page 2
Wells: TWN-3 and TWN-7
The water samples for the above wells were analyzed for chloride and nitrate plus nitrite as nitrogen as
required in the CAP. Chloride and nitrate plus nitrite as nitrogen 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. Well TWN-18 and its duplicate sample TWN-65. All analytical
results for the sample/duplicate pair were within the 20% acceptance limits as required in the QAP (see
Table 2 below).
Groundwater Head Monitoring
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-l, P-2, P-3, 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
The reported estimated a total of approximately 92 lbs of nitrate was removed from the chloroform
pumping wells (MW-4, MW-26, TW4-4, TW4-19, and TW4-20) and the nitrate pumping wells (TWN-2,
TW4-22,- TW4-24, and TW4-25). Of the 92 lbs removed approximately 78 lbs. or 85%, was removed by
the nitrate pumping wells. In Table 3, the DRC shows calculations that verify these reported estimates.
Page 3
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
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.
Conclusions on Compliance with the SCA, Permit and QAP
Per the DRC review it appears that the Report complies with CAP and QAP. Therefore, a letter will be
drafted for the Director Signature, notifying EFR of the review and closing-out of the 2nd Quarter 2013
Nitrate Monitoring Report.
Page 4
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 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
TWN-l TWN-2
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
3rd Qtr 9/27/2010
4th Qtr 12/7/2010
1st Qtr 1/26/2611""
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4 th1 Qtr 10/17/2011
i'st Qtr l/9/2'6i2''
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/17/2012
1st Qtr'2/18/2613 ' "
2nd Qtr 4/23/2013
0.5
0.6
0.6
0.6
""6.5
0.5
0.5
0.5
"6.6
0.6
0.6
0.43
"6"68
0.84
17
20
19
14
17
19
14
......10
"l5
17
17
17.5
17.6
17.4
1st Qtr 3/24/2010
2nd Qtr 6/2/2010
3rd Qtr 9/29/2010
4 thQtr 12/9/2010
ls't"Qt'r'2/i'/2011 "'
2nd Qtr 4/28/2011
3rd Qtr 7/28/2011
4 th1 Qtr10/20/2011
lstQtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4th Qtr 7/17/2012
lstQtr 2/19/2013 "
2nd Qtr 4/24/2013
62.1
48
43
40
, .\33
33
31
48
54
22.10
57.3
58
85
97
104
93
93
85
74
76
86
103
93
79
80.5
82.1
Monitoring Event
TWN-3
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event
TWN-4
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/25/2010
2nd Qtr 6/3/2010
3rd Qtr 7/16/2010
4th Qtr 12/10/2010
lsTptr 27172011'
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
is't Qtr i/12/26'l2 '
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4 th Qtr 10/17/2012
1st Qtr 2/19/2013
2nd Qtr 4/24/2013
27
24
24
. 26
25
25
25 iiiiii • 24
mm 27
12.1
22.2
27.4
111
118
106
117
138
128
134
129
143
152
158
149
157
158
1st Qtr 3/16/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4th1 Qtr12/8/2010
lst'Qtri/25/20ii
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4 th Qtr 10/18/2011
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr 7/15/2012
1st Qtr 2/18/2013
2nd Qtr 4/23/2013
0.9
1.0
0.9
1.0
"0.9
0.9
1.1
0.9
0.9
1.1
1.4
1.45
1.5
1.6
22
22
19
21
21
21
35
20
20
24
25
26.4
25.3
24.4
TWN-5
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
TWN-6
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/16/2010
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
4th Qtr 12/7/2010
isTotr V25/2011
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
1st Qtr 1/9/2012 " "
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/15/2012
lstQtr2013
2nd Qtr 2013
0.3
0.3
0.3
0.3
0.4
0.3
0.3
0.3
'6T2
0.3
0.3
<0.1
NA'
NA
43
44
43
45
47
44
44
45
"'45
39
48
43.5
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 7/13/2010
4th Qtr 12/7/2010
lstQtr"'l/26/2011 '
2nd Qtr 4/20/2011
3rd Qtr 7/27/2011
4 th Qtr 10/18/2011
1st Qtr 1/16/2612" "
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr 7/15/2012
1st Qtr 2013
2nd Qtr 2013
1.5
1.4
1.4
1.2
.....„..„.
1.5
1.1
1.4
""1.2
1.1
1.4
0.78
19
22
73
21
18
22
17
21
20
22
22
20.4
NA
NA
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NA = Per the CAP and SCO, these wells not sampled 2013
Table 2 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-7
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event
TWN-8
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010
2nd Qtr 5/28/2010
3rd Qtr 7/14/2010
4th Qtr 12/10/2010
lstQtr 1/27/2011
2nd Qtr 4/21/2011
3rd Qtr 7/29/2011
4th Qtr10/19/2011
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/26/2012
4 th Qtr 10/16/2012
1st Qtr 2/19/2013
2nd Qtr 4/24/2012
0.8
1.2
1.8
1
1.3
1.7
0.7
2.2
2.3
1.2
0.9
0.64
0.59
1.16
6
6
7
4
6
6
5
6
5
6
6
5.67
5.68
5.88
1st Qtr 3/16/2010
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
4 th Qtr 12/7/2010
1st Qtr 1/25/2011
2nd Qtr 4/19/2011
3rd Qtr 7/26/2011
^.^.AP/1?/.2.0^..
1st Qtr 1/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4thi Qtr 7/15/2012
1st Qtr 2013
2nd Qtr 2013
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
NA
NA
11
11
11
9
13
10
18
10
11
15
11
11.4
Monitoring Event TWN-9
Nitrate, Nitrate +
Nitrite (mg/l)
7.6
7.7
8.0
9.5
10.0
• • • 11.0
10.9
12.2
: 10.6 lliHliili
12.5
NA
NA
Chloride (mg/l)
Monitoring Event TWN-10
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 7/15/2010
4 th Qtr 12/9/2010
is'foVw^bii
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4 th Qtr 10/20/2011
1st "Qtr 1/12/2012
2nd Qtr 4/20/2012
3rd Qtr 7/31/2012
4th Qtr 10/17/2012
istQtr2013
2nd Qtr 2013
183
175
210
172
217
192
208
134
202
209
215
194
1st Qtr 3/23/2010
2nd Qtr 6/2/2010
3rd Qtr 7/14/2010
4 th Qtr 12/8/2010
lst'Qtri/2'6/2"oii'
2nd Qtr 4/21/2011
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
1st Qtr"l/l6/2012
2nd Qtr 4/19/2012
3rd Qtr 7/25/2012
4th Qtr 7/16/2012
1st Qtr 2013
2nd Qtr 2013
1.5
1.0
0.2
13
' 03
1.2
0.1
0.2
0.9
0.6
0.12
54
30
21
28
"40
28
28
33
44
28
33
30.8
NA
NA
Monitoring Event TWN-11
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event TWN-12
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
4th Qtr 12/8/2010
1st Qtr'l/27/20il
2nd Qtr 4/26/2011
3rd Qtr 7/27/2011
4th Qtr 10/17/2011
1st Qtr 1/10/2011
2nd Qtr 4/19/2012
3rd Qtr 7/25/2012
4th Qtr 10/16/2012
1st Qtr 2013
2nd Qtr 2013
1.4
1.3
1.4
1.4
"""1.4
1.4
0.1
1.6
""i".6
1.6
1.8
1.84
73
72
76
72
84
76
76
76
"69
71
77
76.4
NA
NA
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
4th Qtr 12/7/2010
1st Qtr l/2"6/201l""
2nd Qtr 4/26/2011
3rd Qtr 7/26/2011
4*0^^0/17/2011,
1st Qtr 1/10/2012 ""
2nd Qtr 4/18/2012
3rd Qtr 7/25/2012
4th Qtr 7/16/2012
1st Qtr 2013
2nd Qtr 2013
0.7
0.8
0.7
0.7
4.2
1.0
0.6
1.2
"*"6"9
1.2
1.4
1.41
113
106
112
103
87
109
102
JB7
"164
106
102
101
NA
NA
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NA = Per the CAP and SCO, these wells not sampled 2013
Table 3 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-13
Nitrate, Nitrate +
Nitrite (mg/l) •>
Chloride (mg/l)
Monitoring Event TWN-14
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010
2nd Qtr 5/26/2010
3rd Qtr 9/27/2010
4th Qtr 12/7/2010
lstQtr 1/25/2011""
2nd Qtr 4/26/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
lsfQtri/9/2012
2nd Qtr 4/18/2012
3rd Qtr 7/24/2012
4th Qtr 10/15/2012
1st Qtr 2013 -
2nd Qtr 2013
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
NA
NA
0.1
0.2
0.4
"i"6
0.1
0.1
47
49
53
57
*"l03
49
49
48 ..... ^
53
48
47.3
1st Qtr 3/24/2010
2nd Qtr 6/2/2010
3rd Qtr 7/15/2010
4th Qtr 12/10/2010
1st Qtr 1/28/2011
2nd Qtr 4/27/2011
3rd Qtr 7/29/2011
4 th Qtr 10/19/2011
lstQtr'i/il/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 7/17/2012
1st Qtr 2013
2nd Qtr 2013
2.9
2.9
3.5
4.2
"3.7
3.5
3.5
3.9
"" 3.5
"3.4
3.7
4.03
24
30
26
28
"24
3P
25
27
" 26
27
27
27.4
NA
NA
Monitoring Event TWN-15
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event TWN-16
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/18/2010
"37dQtr7/13/2bTd"
4th Qtr 12/9/2010
lstQtr 1/27/2011"'
2nd Qtr 4/27/2011
3rd Qtr 7/28/2011
4th Qtr 10/19/2011
1st Qtr 1/11/2012
2nd Qtr 4/20/2012
3rd Qtr 7/26/2012
4th Qtr 10/17/2012
1st Qtr 2013
2nd Qtr 2013
0.7
T6
43
39
1.0
1.2
1.4
1.6
1.6
1.3
1.5
1.6
2.1
1.79
36
38
"43
49
47
38
38
46
50
47
NA
NA
1st Qtr 3/17/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4 th Qtr 12/9/2010
1st Qtr 1/27/2011 "
2nd Qtr 4/27/2011
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
3rd Qtr 7/25/2012
4 th Qtr 7/16/2012
lstQtr 2013
2nd Qtr 2013
1.2
1.3
2.6
2
"4.6'
1.6
2.4
2.6
2.8
2.0
2.4
2.50
35
_ 30
34
39
31
34
33
50
33
32.1
NA
NA
Monitoring Event TWN-17
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event TWN-18
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/24/2010
3rd Qtr 7/15/2010 ~
4 th Qtr 12/10/2010
1st Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
1st Qtr I/I2/2612
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 10/17/2012
1st Qtr 2013
2nd Qtr 2013
8.9
8
8.6
9
8.5
8.1
8.7
9.1
9.5
9.65
78
87
66
65
90
81
74
71
79
80
85
84.8
NA
NA
1st Qtr 3/17/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
4 th Qtr 12/9/2010
1st Qtr 1/27/2011
2nd Qtr 4/26/2011
3rd Qtr 7/28/2011
4th Qtr 10/18/2011
1st Qtr 1/10/2012
2nd Qtr 4/19/2012
3rd Qtr 7/26/2012
4th Qtr 7/16/2012
1st Qtr2/18/2013
2nd Qtr 2/23/2013
1.6
1.8
1.8
1.6
T.4
1.8
1.8
1.9
, 1.9
2.1
2.3'
1.95
"£H
2.32
42
63
64
59
61
67
65
60
64
64
67
67.5
68.7
64.3
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NA = Per the CAP and SCO, these wells not sampled 2013
Table 4 of 4 ^
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-19
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event Upper Wildlife Pond (UMLP)
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qlr 9/27/2016"
4 th Qtr 12/9/20ip
lst Qtr 2/i/26li " '
2nd Qtr 4/28/2011
3rd Qtr 7/28/2011
4th Qtr 10/18/2011
lst Qtr 1/10/2012 "
2nd Qtr 4/19/2012
3rd Qtr 7/26/2012
4th Qtr 10/16/2012
1st Qtr 2013
2nd Qtr 2013
7.2
6.2
7.2
7.0
7.0
6.9
7.1
6.5
"7.O
6.8
7.5
7.7
118
113
113
107
114
120
113
108
114
117
117
118
NA
NA
1st Qtr 3/18/2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/10/2010
lstQtr 1/31/2611'"'
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
'lstQtr'i/31/2'6'12'''
2nd Qtr 2012
3rd Qtr 2012
4th Qtr 2012
1st Qtr 2013
2nd Qtr 2013 "
<0.1
<0.1
<0.1
<0.1
<6.'l
<0.1
<0.1
NS
NS
NS
NA
NA
0.1
0.1
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
NS
NS
NS
Monitoring Event Piezometer 1
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event Piezometer 2
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 2010 NS NS 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4 th Qtr 12/10/2010
1st Qtr i/3i/2'6il'"
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4thi Qtr 10/19/2011
lstQtr 1/11/2012 '
1st Qtr 1/10/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4th Qtr 10/17/2012
lstQtr2/i9/20l'3\"
2nd Qtr 4/24/2013
7.2
6.8
6.5
7
6.8
7
6.6
"7.I
7.0
6.6
7.2
7.66
"8.11
8.88
52
52
60
" "60
58
53
55
78
114
58
56
55
"56.7
53.3
2.ndQtC6/2/201°....
3rd ^"7/19/2616""
4thQtr 12/10/10
1st'Qtr 1/31/2011'
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th1 Qtr 10/19/2011
lstQtr 1/11/2012
1st Qtr 1/31/2012
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4thQtr 7/17/2012
1st Qtr 2/19/2013 "
2nd Qtr 4/24/2013
0.6
0.6
0.2
"6"3
0.3
0.1
0.1
"6.1
0.1
0.2
0.2
0.19
"6.22
0.2
8
8
6
.9
8
9
8
9
1
8
9
9.5
9.67
10.3
Monitoring Event Piezometer 3
Nitrate, Nitrate + Chloride (mg/l)
Monitoring Event Pond D
Nitrate, Nitrate + Chloride (mg/l)
1st Qtr 3/24/2010
.2.Qd.Qt[6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/9/2010
lstQtr 1/31/2011
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
is't Qtri/ii/2012 "'
2nd Qtr 4/20/2012
3rd Qtr 7/27/2012
4 thQtr 10/17/2012
1st Qtr 2/24/2013
2nd Qtr 4/24/2013
1.7
1.6
1.8
1.8
' 1.8
1.7
1.8
1.7
7.8
1.7
1.8
2.75
1.85
1.83
116
36
35
25
""40
35
61
12
"20
53
21
20.1
" 21
21.1
1st Qtr 2010
2ndQtr20iq
3rd Qtr 2010
4th1 Qtr2010
lst'Qt'rT/31/26li'
2nd Qtr 2011
3rd Qtr 2011
4 th Qtr 2011
1st Qtr 2012
2nd Qtr 2012
3rd Qtr 2012
4 th Qtr2012
1st Qtr 2013
2nd Qtr 2012
NS
NS
NS
NS
0.1
NS
NS
NS
NS
NS
NS
NS
NA
NA
NS
NS
NS
NS
NS
NS
NS
NS"
NS
NS
NS
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NS = Not sampled
NA = Per the CAP and SCO, these wells not sampled 2013
\
Table 4 of 5
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TW4-22
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
si
TW4-24
1P1L
Ate
Chloride (mg/l)
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
58 635
586
1st Qtr 2/11/2013
2nd Qtr 6/5/2013
1,260
916
Monitoring Event TW4-25
Nitrate, Nitrate +
Nitrite (mg/l)
lstQtr 2/11/2013
2nd Qtr 6/5/2013
9
5.24
Chloride (mg/l)
190
136
Table 2
Summary of QA/QC Duplicate Sample
2nd Quarter 2013
Parameter GWQS Duplicate of TWN-18
TWN-18 TWN-65 RPD
Nitrate + Nitrite (as N)
Chloride
10 mg/L
none
2.32
64.3
2.46
66.1
-5.9
-2.8
Tabel 3
DRC Nitrate Mass Removal Calculations
Energy Fuels Resorses Inc. White Mesa Mill, Bland, Utah
2nd Quarter 2013
Data Discriptions Chloroform Pumping Wells
MW4 MW-26 TW4-4 TW4-19 TW4-20
Nitrate Pumping Wells
TWN-2 TW4-22 TW4-24 TW4-25
Nitrate (mg/L) 1st Quarter 2013
Nitrate (g/L)
Nitrate (Ibs/L)
Nitrate (lbs/gal)
Total gallons pumped 2nd qtr 2013
lbs of nitrate removed
Gallons of nitrate removed
4.2
4.20E-03
9.28E-06
3.51 E-05
71,187
2.50
0.20
2.1
2.10E-03
4.64E-06
1.76E-05
25,343
0.45
0.04
6.3
6.30E-03
1.39E-05
5.27E-05
65,603
3.46
0.28
3.0
3.00E-03
6.63E-06
2.51 E-05
226,224
5 68
0.46
9.8
9.80E-03
2 17E-05
8.20E-05
20,252
1.66
0.14
57.7
5.77E-02
1.27E-04
4.83E-04
49,579
23.92
1.95
50.2
5.02E-02
1.11E-04
4.20E-04
25,523
10.71
0.87
23.7
2.37E-02
5.24E-05
1.98E-04
187,509
37.16
3.02
5.2
5.24E-03
1.16E-05
4.38E-05
147,310
6.46
0.53
Total lbs of nitrate removed from chloroform pumping wells
Total gallons of nitrate removed chloroform pumping wells
Total lbs of nitrate removed from nitrate pumping wells
Total gallons of nitrate removed nitrate pumping wells
Total lbs of nitrate removed from from all pumping wells
Total gallons of nitrate removed from all pumping wells
% lbs of nitrate removed by nitrate pumping wells
13.74
1.12
78.26
6.37
91.99
7.49
85.1