Interim Baseline Radiological Investigation Report
November 14, 2012
Bear Lodge Project, for Rare Element Resources, Inc.
Rev.1
12
Table 3.3. Integrated Gamma Count Rates and High Pressure Ion Chamber
Measurements
Measurement
Location
Easting
a
Northing
Sodium Iodide
Detector Response
(cpm)
HPIC Response
(µR/hr)
PIC-01
545892.7
4917227.3
12,661
14.14
PIC-02
540987.4
4920776.2
16,636
21.78
PIC-03
540953.8
4923741.4
24,605
21.38
PIC-04
541623.2
4925338.2
8,396
15.61
PIC-05
542384.3
4926289.2
32,786
24.16
PIC-06
542516.3
4926682.5
58,915
39.72
PIC-07
542683.1
4926829.7
46,950
32.03
PIC-08
542810.9
4926744.3
67,903
44.99
PIC-09
544606.0
4924671.0
100,106
59.93
PIC-10
544723.7
4924766.6
81,196
57.31
PIC-11
544765.8
4924815.5
76,285
49.95
Notes:
a
Coordinate system is NAD 1927, UTM Zone 13N, feet.
cpm = counts per minute
µR/hr = micorRoentgens per hour
The data plotted in Figures 3.3 and 3.4 can be summarized as follows:
•
The range of predicted exposure rates is 12.0 to 206.9 μR/hr. The IQR is 9.1 µR/hr (27.9
less 18.8 µR/hr).
•
Elevated levels of radioactivity, nominally characterized by predicted exposure rates
greater than 35 μR/hr, appear to be limited to the known mineralized areas of the Project.
•
Predicted exposure rates decrease in a southerly direction along Miller Creek Road.
•
Gaps in the data, particularly near the eastern edge of the Property, are due entirely to
lack of accessibility. The topography in this area is steep and unsafe to walk in straight
line transects without additional safety equipment.
Based on the above information, it is clear that the Bull Hill and Taylor Ridge areas of the
Project exhibit elevated readings, due to the presence of natural sources within the area.
