DRC-2012-001164 - 0901a068802b154f

Table lof 4
Histonc Nitrate Nitrate + Nitrite and Clonde Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp
ORC-2012-001164
TW M 1 TWIN 2
Monitonng Event Nitrate Nitrate-f-Chlonde (mg/l) Monitoring Event Nitrate Nitrate/-Chlonde (mg/l)
Nitrite (mg/l) Nitnte (mg/l)
1st Qtr 3/17/2010 05 17 1st Qtr 3/24/2010 85
2nd Qtr 5/26/2010 06 20 2nd Qtr 6/2/2010 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 12/9/10 ^" 4» 93
1st Qtr 1/26/2011 0 5 17 1st Qtr 2/1/2011 93
2nd Qtr 4/20/2011 05 19 2nd Qtr 4/28/2011 85
3rd Qtr 7/26/2011 05 14 3rd Qtr 7/28/2011 74
4th Qtr 10/17/2011 05 10 4th Qtr 10/20/2011 76
Monitoring Event
TWN 3
Nitrate Nitrate+
Nitnte (mg/l)
Chlonde (mg/l) Monitonng Event
TWN 4
Nitrate Nitrate-t-
Nitnte (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
ist Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/29/2011
4th Qtr 10/20/2011
25 3
24
24
26
25
.25^
111
118
106
117
138
128
134
129
1st Qtr 3/16/2010
2nd Qtr 5/27/2010
3rd Qtr 9/27/2010
4th Qtr 12/8/10
1st Qtr 1/25/2011
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4th Qtr 10/18/2011
09
10
09
10
09
09
1 1
09
22
22
19
21
21
21
35
20
Monitonng Event
TWN 5
Nitrate, Nitrate +
Nitnte (mg/l)
Chlonde (mg/l) Monitonng Event
TWN 6
Nitrate Nitrate+
Nitnte (mg/l)
Chlonde (mg/l)
1st Qtr 3/16/2010
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
4th Qtr 12/7/2010
ist Qtr 1/25/2011
2nd Qtr 4/20/2011
3rd Qtr 7/26/2011
4th Qtr 10/17/2011
03
03
03
0 3
0 4
03
03
03
43
44
43
45
47
44
44
45
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 7/13/2010
4th Qtr 12/7/10
1st Qtr 1/26/2011
2nd Qtr 4/20/2011
3rd Qtr 7/27/2011
4th Qtr 10/18/2011
15
14
14
12
1 1
15
1 1
14
19
22
73
21
18
22
17
21
Shaded = Nitrate Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 2 of 4
Historic Nitrate Nitrate + Nitnte and Clonde Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp
Monitonng Event
TWN 7
Nitrate Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event
TWN 8
Nitrate Nitrate+
Nitrite (mg/l)
Chlonde (mg/l)
1st Qtr 3/17/2010
2nd Qtr 5/28/2010
3rd Qtr 7/14/2010
4th Qtr 12/10/2010
1st Qtr 1/27/2011
2nd Qtr 4/21/2011
3rd Qtr 7/29/2011
4th Qtr 10/19/2011
08
12
18
1
13
17
07
2 2
1st Qtr 3/16/2010
2nd Qtr 5/26/2010
3rd Qtr 7/12/2010
4th Qtr 12/7/10
1st Qtr 1/25/2011
2nd Qtr 4/19/2011
3rd Qtr 7/26/2011
4th Qtr10/17/2011
<0 1
<0 1
<0 1
<0 1
<0 1
<0 1
<0 1
<0 1
11
11
11
9
13
10
18
10
Monitonng Event TW M 9 Monitonng Event TWN 10 Monitonng Event
Nitrate Nitrate+
Nitrite (mg/l)
Chloride (mg/l)
Monitonng Event
Nitrate Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/23/2010 76 183 1st Qtr 3/23/2010 15 54
2nd Qtr 6/1/2010 77 175 2nd Qtr 6/2/2010 10 30
3rd Qtr 7/15/2010 .^•^ 10 7 210 3rd Qtr 7/14/2010 02 21
4th Qtr 12/9/2010 80 172 4th Qtr 12/8/10 13 28
1st Qtr 2/1/2011 9 5 217 1st Qtr 1/26/2011 03 40
2nd Qtr 4/28/2011 192 2nd Qtr 4/21/2011 12 28
3rd Qtr 7/29/2011 208 3rd Qtr 7/27/2011 0 1 28
4th Qtr 10/20/2011 134 4th Qtr 10/18/2011 02 33
Monitoring Event Tw^ 11 Monitoring Event TWN 12 Monitoring Event
Nitrate Nitrate +
Nitrite (mg/l)
Chlonde (mg/l)
Monitoring Event
Nitrate Nitrate +
Nitnte (mg/l)
Chlonde (mg/l)
1st Qtr 3/17/2010 14 73 1st Qtr 3/17/2010 07 113
2nd Qtr 6/1/2010 13 72 2nd Qtr 5/26/2010 08 106
3rd Qtr 9/27/2010 14 76 3rd Qtr 7/12/2010 07 112
4th Qtr 12/8/2010 14 72 4th Qtr 12/7/10 07 103
1st Qtr 1/27/2011 14 84 1st Qtr 1/26/2011 42 87
2nd Qtr 4/26/2011 14 76 2nd Qtr 4/26/2011 10 109
3rd Qtr 7/27/2011 0 1 76 3rd Qtr 7/26/2011 06 102
4th Qtr 10/17/2011 16 76 4th Qtr 10/17/2011 12 87
Shaded = Nitrate Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 3 of 4
Historic Nitrate Nitrate + Nitrite and Clonde Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp
Monitonng Event TW^ 1 13 Monitonng Event TWN 14 Monitonng Event
Nitrate Nitrate+
Nitrite (mg/l)
Chlonde (mg/l)
Monitonng Event
Nitrate Nitrate+
Nitrite (mg/l)
Chlonde (mg/f)
1st Qtr 3/17/2010 <0 1 47 1st Qtr 3/24/2010 29 24
2nd Qtr 5/26/2010 0 1 49 2nd Qtr 6/2/2010 29 30
3rd Qtr 9/27/2010 02 53 3rd Qtr 7/15/2010 35 26
4th Qtr 12/7/2010 0 4 57 4th Qtr 12/10/10 42 28
1st Qtr 1/25/2011 16 103 1st Qtr 1/28/2011 37 24
2nd Qtr 4/26/2011 <0 1 49 2nd Qtr 4/27/2011 35 30
3rd Qtr 7/26/2011 01 49 3rd Qtr 7/29/2011 35 25
4th Qtr 10/17/2011 <0 1 48 4th Qtr 10/19/2011 39 27
Monitonng Event TW^ 15 Monitonng Event TWN 16 Monitonng Event
Nitrate Nitrate+
Nitrite (mg/l)
Chloride (mg/l)
Monitonng Event
Nitrate Nitrate-f
Nitrite (mg/l)
Chlonde (mg/l)
1st Qtr 3/18/2010 07 43 1st Qtr 3/17/2010 12 35
2nd Qtr 5/28/2010 10 39 2nd Qtr 5/27/2010 13 35
3rd Qtr 7/13/2010 10 36 3rd Qtr 9/27/2010 26 35
4th Qtr 12/9/2010 12 38 4th Qtr 12/9/10 2 30
1st Qtr 1/27/2011 14 43 1st Qtr 1/27/2011 46 34
2nd Qtr 4/27/2011 16 49 2nd Qtr 4/27/2011 16 39
3rd Qtr 7/28/2011 16 47 3rd Qtr 7/27/2011 24 31
4th Qtr 10/19/2011 13 38 4th Qtr 10/18/2011 26 34
Monitoring Event TW^ 17 Monitonng Event TWN 18 Monitoring Event
Nitrate Nitrate +
Nitrite (mg/l)
Chlonde (mg/l)
Monitonng Event
Nitrate Nitrate+
Nitnte (mg/l)
Chloride (mg/l)
1st Qtr 3/24/2010 78 1st Qtr 3/17/2010 16 42
2nd Qtr 6/3/2010 iigilB ~ 11 87 2nd Qtr 6/1/2010 18 63
3rd Qtr 7/15/2010 89 66 3rd Qtr 9/27/2010 18 64
4th Qtr 12/10/2010 8 65 4th Qtr 12/9/10 16 59
1st Qtr 2/1/2011 8 6 90 1st Qtr 1/27/2011 14 61
2nd Qtr 4/28/2011 9 81 2nd Qtr 4/26/2011 18 67
3rd Qtr 7/29/2011 85 74 3rd Qtr 7/28/2011 18 65
4th Qtr 10/20/2011 8 1 71 4th Qtr 10/18/2011 19 60
Shaded = Nitrate Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 4 of 4
Historic Nitrate Nitrate + Nitrite and Clonde Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp
Monitoring Event TWN 19 Monitonng Event Upper Wildlife Pond (UMLP) Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chlonde (mg/l)
Monitonng Event
Nitrate, Nitrate +
Nitnte (mg/l)
Chlonde (mg/l)
1st Qtr 3/23/2010
2nd Qtr 6/1/2010
3rd Qtr 9/27/2010
_4th Qtr 12/9/2010
ist Qtr 2/1/2011
2nd Qtr 4/28/2011
3rd Qtr 7/28/2011
4th Qtr 10/18/2011
72
62
72
7 0
7 0
69
7 1
65
118
113
113
107
114
120
113
108
1st Qtr 3/18/2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/10/10
1st Qtr 1/31/2010
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
<0 1
<0 1
<0 1
<0 1
0 1
<0 1
<0 1
<0 1
<10
<10
<10
1
1
<10
<10
<10
Monitonng Event Piezometer 1 Monitoring Event Piezometer 2 Monitonng Event
Nitrate Nitrate-i-
Nitnte (mg/l)
Chlonde (mg/l)
Monitoring Event
Nitrate Nitrate+
Nitrite (mg/l)
Chlonde (mg/l)
1st Qtr 2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr 12/10/2010
1st Qtr 1/31/2011
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
NS
72
68
6 5
7
6 8
7
66
NS
52
52
60
60
58
53
55
1st Qtr 2010
2nd Qtr 6/2/2010
3rd Qtr 7/19/2010
4th Qtr12/10/10
1st Qtr 1/31/2010
2nd Qtr 4/25/2011
3rd Qtr 7/25/2011
4th Qtr 10/19/2011
NS
06
06
02
03
03
01
01
NS
8
8
6
9
8
9
8
Monitormg Event Piezometer 3 Monitoring Event Pond D Monitormg Event
Nitrate Nitrate +
Nitnte (mg/l)
Chlonde (mg/l)
Monitoring Event
Nitrate Nitrate+
Nitrite (mg/l)
Chlonde (mg/l)
1st Qtr 3/24/2010 17 116 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010 16 36 2nd Qtr 2010 NS NS
3rd Qtr 7/19/2010 18 35 3rd Qtr 2010 NS NS
4th Qtr 12/9/2010 18 25 4th Qtr 2010 NS NS
1st Qtr 1/31/2011 18 40 1st Qtr 1/31/2010 01 3
2nd Qtr 4/25/2011 17 35 2nd Qtr 2011 NS NS
3rd Qtr 7/25/2011 18 61 3rd Qtr 2011 NS NS
4th Qtr 10/19/2011 17 12 4th Qtr 2011 NS NS
Shaded = Nitrate Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NS = Not sampled