Preliminary Public Dose Evaluation in Support of the Development of the
November 2012
Rare Element Resources Bear Lodge Project
27
Table 4.3 Dust Emission Summary for Bull Hill Mine
Source Name
Source
Type
Emission
Activity
Dust Emission
Rate
a
(kg y
-1
)
Source area
(m
2
)
Modeled Dust
Emission
Factor
(g m
-2
s
-1
)
BHM
Open Pit
Blasting
3,627
9.63 x 10
5
1.36 x 10
-4
Truck
Loading
323,400
Dozer
Operation
28,080
Hauling
3.75 x 10
6
Total
4.1x 10
6
Notes
a
Emission rate is assumed to be emitted homogeneously over the mine area.
BHM = Bull Hill Mine
g = gram
kg = kilogram
m = meter
s = second
y= year
4.2.2.3
Summary of Emission from Three Sources Considered at the BLP
Table 4.4 summarizes the emission estimates for the BHM, LGOS, and TSF as well as other
parameters used to model off-site impacts of dust emissions.
Table 4.4 Emission Summary for Bear Lodge Project
Source
Name
Source
Type
Area
(m
2
)
Effective
Release
Height
(m)
Dust
(g m
-2
s
-1
)
Radon-220
(g m
-2
s
-1
)
Radon-222
(g m
-2
s
-1
)
LGOS
Area
281,257
0.5
1.36 x 10
-6
3.83 x 10
-19
1.84 x 10
-17
TSF
Area
1,270,710
0.5
9.72 x 10
-7
3.83 x 10
-18
2.15 x 10
-16
BHM
Mine Pit
962,505
0
1.36 x 10
-4
3.83 x 10
-17
3.47 x 10
-16
Notes
BHM = Bull Hill Mine
g = gram
LGOS = log-grade ore stockpile
m = meter
s = second
TSF = tailings storage facility
