DRC-2010-003541 - 0901a06880194640

DENISO
MINES
.14
Denison Minas Corp.
8429 3. Highway 191, PO Box 809
Blanding, UT 84311
USA
Tel : [phone]
Fax : [phone]
www.danlaonminas.coni
VIA PDF AND EXPRESS DELIVERY
June 11,2010
Dane L. Finerfi-ock, Co-Executive Secretary
Utah Water Quality Board
Utah Department of Environmental Quality
168 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4810
Re: White Mesa Mill Annual Seeps and Springs Sampling -
Notice Pursuant to Utah Groundwater Discharge Permit UGW370004 .
Dear Mr. Finerfi-ock:
Denison Mines (USA) Corp. is providing this letter to notify the Utah Department ofEnvironmental Quality of
the White Mesa Mill's (the "Mill's") annual seeps and springs sampling event as required by Utah Groundwater
Discharge Permit (the"GWDP") UGW370004. The Mill plans to begin the sampling event during the week of
Monday, July 5, 2010.
The Mill staff will attempt to sample the following locations: Coral Canyon Seep, Corral Seep, Ruin Springs,
Cottonwood Seep, Westwater Seep, and Entrance Seep, consistent with the GWDP and the March 2009
Sampling Plan for Seeps and Springs (the "Sampling Plan"). As described in the Sampling Plan, several of
these locations have historically been too dry for sampling. Per the Sampling Plan, beginning the week of July
5, 2010, the Mill staff will make three attempts at sampling each location and will document during each
attempt whether or not conditions permit development and sampling.
If you have any questions or require fiirther assistance, please contact Mr. Richard Bartlett, Mill Manager; Mr.
David Turk, Radiation Safety Officer; or Ryan Palmer at [phone].
Yours very truly.
Jo Ann Tischler
Director, Compliance and Permitting
DENISON MINES (USA) CORP.
cc: Richard Bartlett
David C. Frydenlund
Ron Hochstein;
Ryan Pahner
Harold Roberts
David Turk
DUSA Central Files
DENISO
MINES