DRC-2012-001579 - 0901a068802e3098

Table lof 4?-* ^
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
2012-00157
TW N-1 TWI\ -2
Monitoring Event Nitrate, Nitrate + Chloride (mg/l) Monitoring Event Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (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 69 97
3rd Qtr 9/27/2010 06 19 3rd Qtr 9/29/2010 69 104
4th Qtr 12/7/2010 06 14 4th Qtr 12/9/10 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 31 86
Monitoring Event
TW N-3
Monitoring Event
TWh -4
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/25/2010 25 3 111 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 27 106 3rd Qtr 9/27/2010 09 19
4th Qtr 12/10/2010 24 117 4th Qtr 12/8/10 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
Monitoring Event
TW N-5
Monitoring Event
TWW -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 12/7/10 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 0 2 45 1st Qtr 1/10/2012 12 20
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Table 2 of 4
Historic Nitrate, Nitrate + Nitrite and Cloride Concentrations
Nitrate Contamination Investigation
White Mesa Uranium Mill Denision Mines Corp.
Monitoring Event
TW N-7
Monitoring Event
TWN -8
Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l) Monitoring Event Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/i)
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 12/7/10 <0 1 9
1st Qtr 1/27/2011 13 6 1st Qtr 1/25/2011 <0 1 13
2nd Qtr 4/21/2011 17 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 <01 10
1st Qtr 1/11/2012 2 3 5 1st Qtr 1/9/2012 <0 1 11
Monitoring Event TW N-9 Monitoring Event TWN-10 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 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 ...Z'. 10.7 210 3rd Qtr 7/14/2010 02 21
4th Qtr 12/9/2010 8 0 172 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 10 0 192 2nd Qtr 4/21/2011 12 28
3rd Qtr 7/29/2011 11.0 208 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
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 12/7/10 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 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
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
Tabie 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 <01 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 12/10/10 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
1st Qtr 1/9/2012 <10 46 1st Qtr 1/11/2012 35 26
Monitoring Event TWN -15 Monitoring Event TWN-16 Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate -i-
Nitrite (mg/l)
Chloride (mg/i)
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 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
1st Qtr 1/11/2012 15 38 1st Qtr 1/10/2012 28 33
Monitoring Event TWN -17 Monitoring Event TWN-18 Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
Monitoring Event
Nitrate, Nitrate +
Nitrite (mg/l)
Chloride (mg/l)
1st Qtr 3/24/2010 10.4 78 1st Qtr 3/17/2010 16 42
2nd Qtr 6/3/2010 11 87 2nd Qtr 6/1/2010 18 63
3rd Qtr 7/15/2010 8 9 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 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 81 71 4th Qtr 10/18/2011 19 60
1st Qtr 1/12/2012 87 79 1st Qtr 1/10/2012 19 64
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 72 118 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 72 113 3rd Qtr 7/19/2010 <0 1 <10
4th Qtr 12/9/2010 7 0 107 4th Qtr 12/10/10 <0 1 1
1st Qtr 2/1/2011 7 0 114 1st Qtr 1/31/2010 01 1
2nd Qtr 4/28/2011 69 120 2nd Qtr 4/25/2011 <01 <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 7 0 114 1st Qtr 1/31/2010 01 1
Monitoring Event Piezometer 1 Monitoring Event Piezometer 2
Nitrate, Nitrate + Chloride (mg/i) Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (mg/l)
1st Qtr 2010 NS NS 1st Qtr 2010 NS NS
2nd Qtr 6/2/2010 72 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 01 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 0 1 9
Monitoring Event Piezometer 3 Monitoring Event Pond D
Nitrate, Nitrate + Chloride (mg/l) Nitrate, Nitrate + Chloride (mg/l)
Nitrite (mg/l) Nitrite (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
1st Qtr 1/11/2012 18 20 4th Qtr 2012 NS NS
Shaded = Nitrate, Nitrate + Nitrite concentrations greater than the Ground Water Quality Standard of 10 mg/l
NS = Not sampled