Interim Baseline Radiological Investigation Report
November 14, 2012
Bear Lodge Project, for Rare Element Resources, Ltd.
Rev.1
44
Table 8.4. Lanthanide Concentrations on Filters and in Air (concluded)
Sampling Interval
Filter
Concentration
(µg/f)
Concentration in
Air (µg/m
3
)
MDL
(µg/f)
Reporting
Limit
(µg/f)
Location
Start Date
End Date
Volume
Sampled
(scm)
Ce
La
Ce
La
Ce
La
Ce
La
AMS-03
11/16/2011
12/5/2011
30419
14
7
5.E-04
2.3E-04
0.009
0.004
1
1
12/12/2011
12/30/2011
29783
12
6
4.E-04
2.0E-04
0.009
0.004
1
1
1/5/2012
1/30/2012
36237
11
6
3.E-04
1.7E-04
0.002
0.001
1
1
2/13/2012
3/5/2012
43432
10
5
2.E-04
1.2E-04
0.002
0.001
1
1
3/9/2012
3/26/2012
37086
13
7
4.E-04
1.9E-04
0.002
0.001
1
1
3/30/2012
4/20/2012
48393
14
7
3.E-04
1.4E-04
0.002
0.001
1
1
4/30/2012
5/21/2012
35640
18
9
5.E-04
2.5E-04
0.4
0.4
1
1
5/24/2012
6/15/2012
36094
15
7
4.E-04
1.9E-04
0.4
0.4
1
1
6/25/2012
7/13/2012
29576
19
10
6.E-04
3.4E-04
0.4
0.4
1
1
AMS-04
11/16/2011
12/12/2011
42156
16
9
4.E-04
2.1E-04
0.009
0.004
1
1
12/19/2011
1/9/2012
34284
11
6
3.E-04
1.8E-04
0.002
0.001
1
1
1/13/2012
2/6/2012
49620
13
7
3.E-04
1.4E-04
0.002
0.001
1
1
2/19/2012
3/30/2012
40155
18
9
4.E-04
2.2E-04
0.002
0.001
1
1
4/6/2012
4/24/2012
39193
14
7
4.E-04
1.8E-04
0.002
0.001
1
1
5/7/2012
5/24/2012
28056
17
8
6.E-04
2.9E-04
0.4
0.4
1
1
6/1/2012
6/25/2012
3941
22
11
6.E-03
2.8E-03
0.4
0.4
1
1
6/29/2012
7/25/2012
13710
15
8
1.E-03
5.8E-04
0.4
0.4
1
1
Notes:
Ce = cerium
La = lanthanum
scm = standard cubic meters
µg/f = micrograms per filter
µg/m
3
= micrograms per cubic meter
