Interim Baseline Radiological Investigation Report
November 14, 2012
Bear Lodge Project, for Rare Element Resources, Ltd.
Rev.1
39
Table 8.2. Radionuclide Concentrations in Air
Location
Sample Collection
Concentration (µCi/ml)
% of Effluent Concentration
Lower Limit of Detection (µCi/ml)
Start Date
End Date
Volume
(scm)
U-nat
Th-230
Ra-226
Th-nat
U-nat
Th-230 Ra-226 Th-nat
U-nat
Th-230
Ra-226
Th-nat
AMS-01
11/16/2011
11/21/2011
8066
8.4E-17
6.1E-17
5.0E-17
5.5E-17
0.003% 0.002% 0.006% 0.007%
6.7E-21
8.1E-17
1.4E-16
5.5E-19
11/25/2011
12/19/2011
38930
1.7E-17
2.8E-17
1.0E-17
1.1E-17
0.001% 0.001% 0.001% 0.001%
1.4E-21
1.5E-17
2.8E-17
1.1E-19
12/23/2011
1/13/2012
34402
2.0E-17
3.5E-17
1.7E-16
1.3E-17
0.001% 0.001% 0.019% 0.002%
9.8E-22
1.5E-17
2.6E-17
1.3E-19
1/19/2012
2/14/2012
40850
1.7E-17
1.6E-17
1.7E-16
1.1E-17
0.001% 0.001% 0.018% 0.001%
8.3E-22
1.4E-17
2.2E-17
1.1E-19
2/17/2012
3/9/2012
27713
2.4E-17
2.7E-17
1.5E-16
1.6E-17
0.001% 0.001% 0.017% 0.002%
1.2E-21
1.7E-17
3.2E-17
1.6E-19
3/19/2012
4/6/2012
29400
2.3E-17
2.4E-17
1.1E-16
2.2E-17
0.001% 0.001% 0.012% 0.003%
1.2E-21
1.9E-17
2.7E-17
1.5E-19
4/13/2012
5/7/2012
39299
1.7E-17
2.8E-17
9.4E-17
1.1E-17
0.001% 0.001% 0.010% 0.001%
8.6E-22
1.0E-17
2.5E-17
1.1E-19
5/11/2012
6/1/2012
34259
2.0E-17
1.5E-17
2.3E-17
1.3E-17
0.001% 0.000% 0.003% 0.002%
1.6E-21
2.0E-17
1.8E-17
1.3E-19
6/8/2012
6/29/2012
34288
2.0E-17
2.9E-17
3.2E-17
2.6E-17
0.001% 0.001% 0.004% 0.003%
1.6E-21
1.5E-17
1.7E-17
1.3E-19
7/6/2012
7/30/2012
39023
1.7E-17
1.3E-17
4.9E-17
2.3E-17
0.001% 0.000% 0.005% 0.003%
1.4E-21
1.7E-17
1.8E-17
1.1E-19
AMS-02
11/16/2011
11/28/2011
28139
2.4E-17
1.4E-17
2.5E-17
2.3E-17
0.001% 0.000% 0.003% 0.003%
1.9E-21
2.2E-17
3.6E-17
1.6E-19
12/2/2011
12/23/2011
37680
2.4E-17
1.9E-17
9.6E-18
4.8E-17
0.001% 0.001% 0.001% 0.006%
1.4E-21
1.8E-17
2.9E-17
1.2E-19
12/30/2011
1/20/2012
36329
2.4E-17
1.5E-17
5.5E-17
4.8E-17
0.001% 0.000% 0.006% 0.006%
9.3E-22
2.3E-17
2.2E-17
1.2E-19
1/30/2012
2/21/2012
36049
2.4E-17
2.6E-17
1.8E-16
4.8E-17
0.001% 0.001% 0.020% 0.006%
9.4E-22
1.2E-17
2.5E-17
1.2E-19
3/5/2012
3/19/2012
23001
2.4E-17
2.0E-17
9.4E-17
1.2E-16
0.001% 0.001% 0.010% 0.015%
1.5E-21
2.4E-17
3.9E-17
1.9E-19
3/26/2012
4/13/2012
50873
2.4E-17
1.7E-17
3.4E-17
9.6E-17
0.001% 0.001% 0.004% 0.012%
6.7E-22
1.0E-17
1.8E-17
8.6E-20
4/20/2012
5/11/2012
102489
2.4E-17
8.9E-18
1.3E-17
4.8E-17
0.001% 0.000% 0.001% 0.006%
5.3E-22
5.4E-18
4.9E-18
4.3E-20
5/21/2012
6/28/2012
46643
2.4E-17
1.0E-17
1.3E-17
2.4E-17
0.001% 0.000% 0.001% 0.003%
1.2E-21
1.2E-17
1.3E-17
9.4E-20
6/15/2012
7/6/2012
4013
7.2E-17
3.8E-17
1.2E-17
6.7E-16
0.002% 0.001% 0.001% 0.084%
1.3E-20
1.2E-16
1.5E-16
1.1E-18
