Bear Lodge Plan of Operations - page 464

Interim Baseline Radiological Investigation Report November 14, 2012
Bear Lodge Project, for Rare Element Resources, Inc. Rev.1
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TABLE OF CONTENTS
1.0 INTRODUCTION ............................................................................................................ 1
1.1 DESCRIPTION OF THE PROJECT .................................................................................................... 1
1.2 PURPOSE AND SCOPE ................................................................................................................... 1
1.3 ORGANIZATION AND CONTENTS ................................................................................................. 3
2.0 BASELINE FIELD INVESTIGATION SUMMARY AND SCOPE ........................... 4
2.1 OVERALL SCOPE OF PROJECT ...................................................................................................... 4
2.2 DEVIATIONS FROM THE DECEMBER 2010 SAP AND QAPP......................................................... 5
2.3 FUTURE W ORK ............................................................................................................................ 5
3.0 GPS-BASED GAMMA (DIRECT RADIATION) SURVEY........................................ 7
3.1 GPS SURVEY METHODS .............................................................................................................. 7
3.2 RESULTS OF GPS-BASED GAMMA S URVEY ................................................................................ 7
3.3 DERIVATION OF EXPOSURE RATES BASED ON HPIC CORRELATION ........................................ 11
4.0 BASELINE RADIOLOGICAL INVESTIGATION SOIL SAMPLING .................. 17
4.1 SAMPLING STRATEGY AND APPROACH ..................................................................................... 17
4.2 SURFACE SOIL R A-226 RESULTS ............................................................................................... 18
4.3 OTHER RADIONUCLIDES ............................................................................................................ 23
4.4 SURFACE SOIL R A-226 ESTIMATES B ASED ON GAMMA-SOIL RADIUM CORRELATION............ 24
5.0 DATA QUALITY ASSESSMENT................................................................................ 27
6.0 RADON FLUX MEASUREMENTS............................................................................. 30
7.0 AMBIENT RADON MONITORING ........................................................................... 31
8.0 AIRBORNE PARTICULATES..................................................................................... 35
8.1 TOTAL PARTICULATES ..................................................................................................................... 35
8.1.1 Radioactive Particulates.............................................................................................. 36
8.1.2 Lanthanide Particulates ............................................................................................... 42
8.2 PARTICULATE MATTER FRACTIONS................................................................................................. 45
9.0 AMBIENT GAMMA EXPOSURE RATES................................................................. 48
10.0 SUMMARY AND CONCLUSIONS ............................................................................. 50
11.0 REFERENCES................................................................................................................ 52