DRC-2012-002963 - 0901a0688036710e

DRC-2012^02053 Page 1 of2
Russell Topham - Re: Phone conversation regarding Cell 1 liner repairs and leak
detection system monitoring
From: Russell Topham
To: Jo Ann Tischler
Date: 5/17/2012 10:11 AM
Subject: Re: Phone conversation regarding Cell 1 liner repairs and leak detection system monitoring
CC: DanHlllsten; David Turk; DavldFrydenlund; Harold Roberts; Kathy Welnel; Meredith Goble;
Phillip Goble; Rusty Lundberg
Jo Ann,
The attached summary accurately captures our conversation from yesterday. This reply confirms our
concurrence with your proposal to substitute the blow tube monitoring method for the automated method
during the one to two weeks the automation system will be powered down to facilitate liner repairs.
Thank you for documenting the conversation.
"Russ
Russell J. Topham, PE nOH ^n>S^Ar^/%n/ —
Environmental Engineer UKU-cUl/~UUr/04
Utah Division of Radiation Control U ^
Mailing Address: P.O. Box 144850
Salt Lake City, UT 84114-4850
Street Address: Multi-Agency State Office Building, 195 North 1950 West, Salt Lake City, UT 84116
Tel: [phone]
Fax: [phone]
Email: [e-mail]
>» Jo Ann Tischler <[e-mail]> 5/17/2012 9:12 AM >>>
Russ,
This email documents our phone conversation yesterday, May 16, 2012, regarding Denison Mines' liner repair
activities at White Mesa Mill Cell 1. At the time we spoke yesterday, repair crew had completed repairs on
three sides of the cell and was about to begin work on the fourth side. Work on the fourth side requires
shutting down the power to the Cell 1 area, and would also shut down the electronic leak detection system
monitoring at Cell 1, Mill environmental personnel were prepared to return to the use ofthe manual blow
tube method for checking daily and weekly LDS solution level. The Mill estimated that the power needed to be
shut down for approximately one to two weeks, and the electronic sensor and data logging system would be
reactivated on the day power is returned to the area. My phone call to you was to confirm that this approach
was acceptable to DRC, During our call you gave a verbal approval and advised Denison we could proceed on
your verbal OK, You requested that I document our conversation by email, so you could provide a written
confirmation in response.
Thank you for your quick evaluation and agreement with our approach. Please confirm our agreement with an
email note at your convenience.
During our phone call, I also mentioned that Denison would like to include in the next revision ofthe Discharge
file://C:\Documents and Settings\rtopham\Local Settings\Temp\XPgrpwise\4FB4CEEDEQ.,. 5/17/2012
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Minimization Technology ("DMT") Plan, which is currently under review by DRC, a proposed change to the text
accommodate use ofthe blow tube method for LDS monitoring during periods of power loss to the tailings
area. We plan to include that textual change in the version we submit in response to your review comments.
Thank you for your responsiveness and help.
Jo Ann Tischler
Jo Ann Tischler
Director, Compliance and Permitting
t: 303-369-4132 | f- 303-389-4125
105017th Street, Suite 950
Denver, CO. US, 80265
DENISON MINES (USA) CORP
www.denisonmines.conn
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