DRC-2010-003217 - 0901a0688018afc0

• Submittal of Westwater Seep Sampling Data for 2009.
From: Jo Ann Tischler <jtischler(@denisonmines.com>
To: Dean Henderson <Dhenderson(gutah.gov>
Date: 5/6/2010 10:43 AM
Subject: Submittal of Westwater Seep Sampling Data for 2009.
CC: Dane Finerfrock <DFINERFROCK(^utah.gov>, Harold Roberts
<HRoberts(@denisonmines.com>, Ron Hochstein <RHochstein(§denisonmines.com>,
David Frydenlund <DFrydenlund(gdenisonmines.com>
Attachments: C09110722.pdf; C09110722.csv
Dean,
As you requested, I am transmitting analytical results for Westwater Seep that were not included in the annual
White Mesa Mill 2009 Seeps and Springs Sampling Report issued on November 30, 2009. As discussed in that
report, Westwater Seep was dry during the July 9, 2009 sampling event. A subsequent excavation in the seep
soils on November 18, 2009 yielded a pool of water sufficient for collection of a sample. Analytical results for
this sample and it s field blanks are attached to this email in pdf and electronic CSV format.
The electronic CSV file may contain additional laboratory QC backup information not included with previous
water quality data. Denison Mines now requires that the laboratory provide digital QC backup along with digital
analytical reported results, and this information is now part ofthe CSV file.
Please contact me ifyou have any questions on this transmittal.
Your truly,
Jo Ann Tischler
Director, Compliance and Permitting
Jo Ann Tischler
Director. Compliance and Permitting
t: [phone] | f: (303) 389^125
1050 17th Street, Suite 950, Denver, CO 80265
DENISON MINES (USA) CORP
www.denisonmines.com
This e-mail is intended for exclusive use the person(s) mentioned as the recipient(s). This message and any attached files with it are confidential and may contain
privileged or proprietary information. If you are not the intended reclpient(s) please delete this message and notify the sender. You may not use, distribute print or
copy this message if you are not the intended recipient(s).
5/19/2010