My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2010-08-09_REPORT - M2007044
DRMS
>
Day Forward
>
Report
>
Minerals
>
M2007044
>
2010-08-09_REPORT - M2007044
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 4:17:41 PM
Creation date
8/16/2010 3:38:48 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2007044
IBM Index Class Name
REPORT
Doc Date
8/9/2010
Doc Name
Application for venting and monitoring radon emissions at the Whirlwind Mine
From
ENERGY FUELS RESOURCES CORP
To
EPA
Email Name
GRM
ACS
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
65
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
• The Packrat drift at 50% (i.e. it is 50% mineralized) of the baseline emission rate. <br />Approximately 50% of the drift passes through ore zones that were mined out by <br />historical mining operations; <br />• Future developmental drifts at 50% of the baseline emission rate. This is likely a <br />conservative (i.e., high) value as the purpose of the drifts are solely to reach ore <br />zones and they only encounter ore incidentally; and, <br />• Future ore zone stopes at 100% of the baseline emission rate. <br />The areas of the currently exposed ore zone and future drifts are based on measurement <br />from Figures 4 through 7. It is conservatively estimated that 87,000 square feet of ore <br />zone stopes may be open at any one time during mining. This is based on having 10 open <br />stopes each measuring 100 x 100 ft on average with 87% stope recovery. Current mining <br />plans call for only 8 stopes to be open at any one time. The areas of each zone and the <br />calculated prorated areas are summarized in Table 2. <br />Table 2 <br />Prorated Mining Areas <br /> <br /> <br />Area Description <br />Area <br />(SF) Proration <br />Factor Prorated <br />Area <br />(SF) <br />Phases <br />Current Whirlwind Mine decline 42,285 0 0 C, I, II, III <br />Current open area in ore zone 14,992 100 14,992 C,1, II, III <br />Packrat drift (bulkheaded) 113,295 50 56,648 II, III <br />Phase I drift area 27,129 50 13,564 1, II, III <br />Phase II drift area 79,102 50 39,551 11, 111 <br />Phase III drift area 407,453 50 203,726 III <br />Anticipated open area in ore zones 87,000 100 87,000 1,11,111 <br />C = Current Conditions <br />The estimated radon emissions for each phase were then calculated from the prorated <br />areas and the annual baseline emission rate of 0.18 Ci/1,000 SF. The estimates are <br />provided in Table 3. <br />13
The URL can be used to link to this page
Your browser does not support the video tag.