Interim Baseline Radiological Investigation Report
November 14, 2012
Bear Lodge Project, for Rare Element Resources, Ltd.
Rev.1
37
Table 8.1. Radionuclide Concentrations in Filters
Location
Sample Collection
Concentration
Lower Limit of Detection
Start Date
End Date
U-nat
(µg/f)
Th-230
(pCi/f)
Th-230
error ± 2σ
Ra-226
(pCi/f)
Ra-226 error
± 2σ
Th-nat
(µg/f)
U-nat
(µg/f)
Th-230
(µg/f)
Ra-226
(pCi/f)
Th-nat
(µg/f)
AMS-01
11/16/2011
11/21/2011
1
0.49
0.42
0.4
0.7
2
8.0E-5
0.65
1.1
0.02
11/25/2011
12/19/2011
1
1.1
0.53
0.4
0.7
2
8.0E-5
0.60
1.1
0.02
12/23/2011
1/13/2012
1
1.2
0.51
5.9
1.3
2
5.0E-5
0.50
0.9
0.02
1/19/2012
2/14/2012
1
0.67
0.42
6.8
1.3
2
5.0E-5
0.56
0.9
0.02
2/17/2012
3/9/2012
1
0.74
0.40
4.2
1.1
2
5.0E-5
0.48
0.9
0.02
3/19/2012
4/6/2012
1
0.71
0.42
3.1
0.9
3
5.0E-5
0.55
0.8
0.02
4/13/2012
5/7/2012
1
1.1
0.46
3.7
1.1
2
5.0E-5
0.41
1.0
0.02
5/11/2012
6/1/2012
1
0.50
0.43
0.8
0.5
2
8.0E-5
0.68
0.6
0.02
6/8/2012
6/29/2012
1
1.0
0.47
1.1
0.5
4
8.0E-5
0.52
0.6
0.02
7/6/2012
7/30/2012
1
0.52
0.42
1.9
0.7
4
8.0E-5
0.65
0.7
0.02
AMS-02
11/16/2011
11/28/2011
1
0.38
0.38
0.7
0.7
3
8.0E-5
0.61
1.0
0.02
12/2/2011
12/23/2011
1
0.78
0.48
0.4
0.7
2
8.0E-5
0.66
1.1
0.02
12/30/2011
1/20/2012
1
0.61
0.51
2.3
0.8
2
5.0E-5
0.82
0.8
0.02
1/30/2012
2/21/2012
1
1.1
0.46
7.4
1.3
2
5.0E-5
0.43
0.9
0.02
3/5/2012
3/19/2012
1
0.84
0.45
3.9
1.0
5
5.0E-5
0.55
0.9
0.02
3/26/2012
4/13/2012
1
0.72
0.41
1.4
0.7
4
5.0E-5
0.52
0.9
0.02
4/20/2012
5/11/2012
1
0.37
0.34
0.6
0.4
2
8.0E-5
0.55
0.5
0.02
5/21/2012
6/28/2012
1
0.43
0.35
1.2
0.5
1
8.0E-5
0.54
0.6
0.02
6/15/2012
7/6/2012
3
1.6
0.58
3.5
0.8
28
8.0E-5
0.49
0.6
0.02
