DRC-2012-002666 - 0901a06880346438

Table lof 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination investigation p% ^
White Mesa Uranium Mill Denision Mines Corp. IJ {\ 20l2-00266(
Monitoring Event
TWN-1
Monitoring Event
TWN-2
Monitoring Event Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/17/2010 05 17 1st Qtr 3/24/2010 62«1 85
2nd Qtr 5/26/2010 06 20 2nd Qtr 6/2/2010 6d 97
3rd Qtr 9/27/2010 06 19 3rd Qtr 9/29/2010 69 104
4th Qtr 12/7/2010 06 14 4th Qtr 12/9/2010 48 93
1st Qtr 1/26/2011 05 17 1st Qtr 2/1/2011 43 93
2nd Qtr 4/20/2011 05 19 2nd Qtr 4/28/2011 40 85
3rd Qtr 7/26/2011 05 14 3rd Qtr 7/28/2011 33 74
4th Qtr 10/17/2011 05 10 4th Qtr 10/20/2011 33 76
1st Qtr 1/9/2012 06 15 1st Qtr 1/12/2012 ""il 86
2nd Qtr 4/18/2012 06 17 2nd Qtr 4/20/2012 48 103
3rd Qtr 7/24/2012 06 17 3rd Qtr 7/31/2012 54 93
Monitoring Event
TWN-3
Monitoring Event
TWN-4
Monitoring Event Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate •<•
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/25/2010 253 111 1st Qtr 3/16/2010 09 22
2nd Qtr 6/3/2010 26 118 2nd Qtr 5/27/2010 10 22
3rd Qtr 7/16/2010 106 3rd Qtr 9/27/2010 09 19
4th Qtr12/10/2010 24 117 4th Qtr 12/8/2010 10 21
1st Qtr 2/1/2011 24 138 1st Qtr 1/25/2011 09 21
2nd Qtr 4/28/2011 26 128 2nd Qtr 4/20/2011 09 21
3rd Qtr 7/29/2011 25 134 3rd Qtr 7/26/2011 11 35
4th Qtr 10/20/2011 25 129 4th Qtr 10/18/2011 09 20
1st Qtr 1/12/2012 "'""*""""'"25 143 1st Qtr 1/9/2012 09 20
2nd Qtr 4/20/2012 24 152 2nd Qtr 4/18/2012 11 24
3rd Qtr 7/31/2012 27 158 3rd Qtr 7/25/2012 14 25
Monitoring Event
TWN-5
Monitoring Event
TWN-6
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate •>•
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/16/2010 03 43 1st Qtr 3/23/2010 15 19
2nd Qtr 5/26/2010 03 44 2nd Qtr 6/1/2010 14 22
3rd Qtr 7/12/2010 03 43 3rd Qtr 7/13/2010 14 73
4th Qtr 12/7/2010 03 45 4th Qtr 12/7/2010 12 21
1st Qtr 1/25/2011 04 47 1st Qtr 1/26/2011 11 18
2nd Qtr 4/20/2011 03 44 2nd Qtr 4/20/2011 15 22
3rd Qtr 7/26/2011 03 44 3rd Qtr 7/27/2011 11 17
4th Qtr 10/17/2011 03 45 4th Qtr 10/18/2011 14 21
1st Qtr 1/9/2012 02 45 1st Qtr 1/10/2012 12 20
2nd Qtr 4/18/2012 03 39 2nd Qtr 4/18/2012 11 22
3rd Qtr 7/24/2012 03 48 3rd Qtr 7/25/2012 14 22
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 2 of 4
Historic Nitrate, Nitrate -i- Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TWN-7
Monitoring Event
TWN-8
Monitoring Event Nitrate, Nitrate -f
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/i)
Chloride (mg/l)
1st Qtr 3/17/2010 08 6 1st Qtr 3/16/2010 <0 1 11
2nd Qtr 5/28/2010 12 6 2nd Qtr 5/26/2010 <0 1 11
3rd Qtr 7/14/2010 18 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 07 5 3rd Qtr 7/26/2011 <0 1 18
4th Qtr 10/19/2011 22 6 4th Qtr 10/17/2011 <0 1 10
1st Qtr 1/11/2012 23 5 1st Qtr 1/9/2012 <0 1 11
2nd Qtr 4/20/2012 12 6 2nd Qtr 4/18/2012 <0 1 15
3rd Qtr 7/26/2012 09 6 3rd Qtr 7/24/2012 <0 1 11
Monitoring Event TWN-9 Monitoring Event TWN-10 Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate
Nitrite (mg/i)
Chloride (mg/l)
1st Qtr 3/23/2010 76 183 1st Qtr 3/23/2010 15 54
2nd Qtr 6/1/2010 7 7 175 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 12/8/2010 13 28
1st Qtr 2/1/2011 9 5 217 1st Qtr 1/26/2011 03 40
2nd Qtr 4/28/2011 10.0 192 2nd Qtr 4/21/2011 1 2 28
3rd Qtr 7/29/2011 110 208 3rd Qtr 7/27/2011 01 28
4th Qtr 10/20/2011 10.9 134 4th Qtr 10/18/2011 02 33
1st Qtr 1/12/2012 12.2 202 1st Qtr 1/10/2012 08 44
2nd Qtr 4/20/2012 10.6 209 2nd Qtr 4/19/2012 09 28
3rd Qtr 7/31/2012 12 3 215 3rd Qtr 7/25/2012 06 33
Monitoring Event TWN-11 Monitoring Event TWN-12 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 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 12/7/2010 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 01 76 3rd Qtr 7/26/2011 06 102
4th Qtr 10/17/2011 16 76 4th Qtr 10/17/2011 12 87
1st Qtr 1/10/2011 16 69 1st Qtr 1/10/2012 09 104
2nd Qtr 4/19/2012 16 71 2nd Qtr 4/18/2012 12 106
3rd Qtr 7/25/2012 18 77 3rd Qtr 7/25/2012 14 102
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 Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-13 Monitoring Event TWN-14 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 <0 1 47 1st Qtr 3/24/2010 29 24
2nd Qtr 5/26/2010 01 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 04 57 4th Qtr 12/10/2010 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
1st Qtr 1/9/2012 <0 1 46 1st Qtr 1/11/2012 35 26
2nd Qtr 4/18/2012 <0 1 53 2nd Qtr 4/20/2012 34 27
3rd Qtr 7/24/2012 0 1 48 3rd Qtr 7/27/2012 37 27
Monitoring Event TWN-15 Monitoring Event TWN-16 Monitoring Event
Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate •<-
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/18/2010 07 43 1st Qtr 3/17/2010
2nd Qtr 5/27/2010
12 35
2nd Qtr 5/28/2010 10 39
1st Qtr 3/17/2010
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 1 2 38 4th Qtr 12/9/2010 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
1st Qtr 1/11/2012 15 38 ist Qtr 1/10/2012 28 33
2nd Qtr 4/20/2012 16 46 2nd Qtr 4/19/2012 20 50
3rd Qtr 7/26/2012 2 1 50 3rd Qtr 7/25/2012 24 33
Monitoring Event TWN-17 Monitoring Event TWN-18
Nitrate, Nitrate + Chloride (mg/i) Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 3/24/2010 10 4 78 1st Qtr 3/17/2010 16 42
2nd Qtr 6/3/2010 S' 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 12/9/2010 16 59
1st Qtr 2/1/2011 86 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
1st Qtr 1/12/2012 87 79 1st Qtr 1/10/2012 19 64
2nd Qtr 4/20/2012 9 1 80 2nd Qtr 4/19/2012 2 1 64
3rd Qtr 7/27/2012 95 85 3rd Qtr 7/26/2012 23 67
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 Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event TWN-19 Monitoring Event Upper Wildlife Pond (UMLP) Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/23/2010 7 2 118 1st Qtr 3/18/2010 <0 1 <10
2nd Qtr 6/1/2010 62 113 2nd Qtr 6/2/2010 <0 1 <10
3rd Qtr 9/27/2010 7 2 113 3rd Qtr 7/19/2010 <0 1 <10
4th Qtr 12/9/2010 70 107 4th Qtr 12/10/2010 <0 1 1
1st Qtr 2/1/2011 70 114 1st Qtr 1/31/2011 01 1
2nd Qtr 4/28/2011 69 120 2nd Qtr 4/25/2011 <0 1 <10
3rd Qtr 7/28/2011 7 1 113 3rd Qtr 7/25/2011 <0 1 <10
4th Qtr 10/18/2011 65 108 4th Qtr 10/19/2011 <0 1 <10
1st Qtr 1/10/2012 70 114 1st Qtr 1/31/2012 0 1 1
2nd Qtr 4/19/2012 68 117 2nd Qtr 2012 NS NS
3rd Qtr 7/26/2012 75 117 3rd Qtr 2012 NS NS
Monitoring Event Piezometer 1 Monitoring Event Piezometer 2
Nitrate, Nitrate -i-Chloride (mg/l) Nitrate, Nitrate -i-Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 2010 NS NS 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010 7 2 52 2nd Qtr 6/2/2010 06 8
3rd Qtr 7/19/2010 68 52 3rd Qtr 7/19/2010 06 8
4th Qtr 12/10/2010 65 60 4th Qtr 12/10/10 ' 02 6
1st Qtr 1/31/2011 7 60 1st Qtr 1/31/2011 03 9
2nd Qtr 4/25/2011 68 58 2nd Qtr 4/25/2011 03 8
3rd Qtr 7/25/2011 7 53 3rd Qtr 7/25/2011 0 1 9
4th Qtr 10/19/2011 66 55 4th Qtr 10/19/2011 01 8
1st Qtr 1/11/2012 7 1 78 1st Qtr 1/11/2012 01 9
1st Qtr 1/10/2012 70 114 1st Qtr 1/31/2012 0 1 1
2nd Qtr 4/20/2012 66 58 2nd Qtr 4/20/2012 02 8
3rd Qtr 7/27/2012 72 56 3rd Qtr 7/27/2012 02 9
Monitoring Event Piezometer 3 Monitoring Event Pond D
Nitrate, Nitrate + Chloride (mg/l) Nitrate, Nitrate -i-Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/i)
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 1/31/2011 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
1st Qtr 1/11/2012 18 20 1st Qtr 2012 NS NS
2nd Qtr 4/20/2012 17 53 2nd Qtr 2012 NS NS
3rd Qtr 7/27/2012 18 21 3rd Qtr 2012 NS NS
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NS = Not sampled