Interim Baseline Radiological Investigation Report
November 14, 2012
Bear Lodge Project, for Rare Element Resources, Ltd.
Rev.1
41
Table 8.3. Summary Statistics for Radionuclide Concentrations in Air
Concentration (µCi/ml)
Location
U-nat
Th-230
Ra-226
Th-nat Concentration
Avg
σ
Min
Max
Avg
σ
Min
Max
Avg
σ
Min
Max
Avg
σ
Min
Max
AMS-01
2.6E-17
2.1E-17
1.7E-17
8.4E-17
2.8E-17
1.4E-17
1.3E-17
6.1E-17 8.5E-17
6.1E-17
9.6E-18
1.7E-16 2.0E-17
1.3E-17
1.1E-17
5.5E-17
AMS-02
2.9E-17
1.6E-17
2.4E-17
7.2E-17
1.9E-17
9.1E-18
8.9E-18
3.8E-17 4.8E-17
5.6E-17
-2.4E-18 1.8E-16 1.3E-16
2.1E-16
2.3E-17
6.7E-16
AMS-03
1.9E-17
3.1E-18
1.4E-17
2.3E-17
2.4E-17
1.4E-17
9.0E-18
5.1E-17 2.2E-17
1.9E-17
-2.4E-18 5.1E-17 2.0E-17
1.3E-17
6.1E-18
3.7E-17
AMS-04
4.3E-17
6.3E-17
1.4E-17
1.7E-16
6.3E-17
8.6E-17
1.3E-17
2.4E-16 1.1E-16
6.7E-17
2.1E-17
2.3E-16 7.0E-17
1.3E-16
5.6E-18
3.3E-16
Site Wide
2.8E-17
2.9E-17
1.4E-17
1.7E-16
3.0E-17
3.8E-17
8.9E-18
2.4E-16 6.4E-17
6.0E-17
-2.4E-18 2.3E-16 5.7E-17
1.2E-16
5.6E-18
6.7E-16
Notes:
Ra-226 = radium-226
σ = standard deviation
Th-230 = thorium-230
Th-nat = natural thorium
U-nat = natural uranium
µCi/ml = micocuries per milliliter
