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2008-08-06_REVISION - M1977285
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2008-08-06_REVISION - M1977285
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Last modified
6/15/2021 10:32:51 AM
Creation date
10/28/2008 12:15:15 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1977285
IBM Index Class Name
REVISION
Doc Date
8/6/2008
Doc Name
Address designated mining operations
From
Denison Mines
To
DRMS
Type & Sequence
AD1
Email Name
RCO
Media Type
D
Archive
No
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Christy Woodward <br />July 31, 2008 <br />Page 12 <br />Total Metals Analyses <br />Total metals analyses measure the total concentration of particular metals or metalloids in a <br />rock. Total metals data do not provide specific information regarding the potential mobility of. <br />the particular metal or metalloid, but they are useful in conducting general evaluations of the <br />potential for mine rock to cause adverse impacts to human health or the environment. The <br />mechanisms of human or environmental exposure may include leaching, dispersion as dust, <br />incidental ingestion though recreation activities or other mechanisms. In the event that <br />constituents occur in problematic concentrations in the mine rock, knowledge of total metals <br />concentrations facilitates development of appropriate engineering mitigations to interrupt <br />potential mechanisms during mine development or reclamation and mitigate associated <br />environmental liabilities. <br />Total metals data collected in this investigation will be compared to background <br />concentrations and screening levels, such as the risk management criteria for mining sites <br />published by the U.S. Department of Interior, Bureau of Land Management (BLM 2004), to <br />determine if a potential hazard exists. Concentrations that exceed screening levels are not <br />necessarily problematic, but this risk screening approach will provide Denison with <br />information to further evaluate if additional data collection should be considered. <br />References <br />ASTM International, Inc. 2007. Standard Test Method for Column Percolation Extraction of Mine <br />Rock by the Meteoric Water Mobility Procedure, ASTM E2242-07. June. <br />ASTM International, Inc. 2004. Standard Test Method for 24-h Batch-Type Measurement of <br />Contaminant Sorption by Soils and Sediments, ASTM D4646-03. January. <br />Colorado Division of Reclamation Mining and Safety (DRMS). 2008a. Notices of Determination <br />of Designation Mining Operation (DMO). February 8. <br />Colorado Department of Public Health and Environment, 1997, Proposed Soil Remediation <br />Objectives Policy, Attachment 4, Guidelines for Determining Background <br />Concentrations. December 31. <br />DBMS. 2008b. Division Response to Operator's Memo (Draft dated March 31, 2008) Concerning a <br />Proposed Program for Designated Mining Operation (DMO) Environmental <br />Analysis, at the Sunday Mine Complex and Van 4 Mine. May 9. <br />DRMS. 2008c. New Requirements - Designated Mining Operations (DMO) Status - <br />Implementation of HB 1161. June 6. <br />Denison Mines (USA) Corp. (Denison). 2008. Memorandum in Response to Notice of <br />Determination of Designated Mining Operation (DMO, DRMS File Numbers <br />0:\64986 - Denison\Task Order 3 - DMO Sampling and Analysis Plan\Task 3.1 - Soil Ore Rock Data Collection Plan\Pinal Denison Sunday Mines Group Soil Ore Rock Data <br />Collection Work Plan.doc
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