DRC-2010-002464 - 0901a068801731c7

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Oonison Mfates (USA) Corp.
109017th Street, Suite 990
Denver, CO 80269
USA
Tel: [phone]
F«: 303 389^129
www.(ienisonmines.com
DENISOI^i
MINES
March 11, 2010
VIA PDF AND FEDERAL EXPRESS
Dane L. Finerfrock, 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: State of Utah Ground Water Discharge Permit No. UGW370004 (the "GWDP")
White Mesa Uranium Mill - Notice Pursuant to Part I.G.l(a)
Dear Mr. Finerfrock:
The White Mesa Mill (the "Mill") performed monthly accelerated groundwater monitoring of
MW-18 on January 27, 2010 under the March 17, 2008 version ofthe GWDP (the "Previous
GWDP"). The final analytical results ofthis sampling are contained in an analytical report dated
February 10, 2010.
Pursuant to Part I.G. l.a) ofthe Previous GWDP, please take notice that the concentration ofthe
following consfituent in the following monitoring well sampled on January 27 of 2010 exceeded
its respective ground water compliance level ("GWCL") in Table 2 ofthe Previous GWDP:
Table 1 - GWCL Exceedance for January under the Previous GWDP
Monitoring Well
(Water Class)
MW-18 (Class III)
Constituent
Thallium
GWCL in Previous
GWDP
(ug/L)
0.5
Sample Result
3.32
As confirmed via email correspondence on February 16 and 17, 2010, as a result ofthe issuance
ofthe modified GWDP on January 20, 2010 (the "Current GWDP"), which sets revised GWCLs,
all requirements to perform accelerated monitoring under Part l.G.l ofthe Previous GWDP
ceased effective on January 20, 2010, and the effect ofthe issuance ofthe Current GWDP was to
create a "clean slate" for all constituents in all wells going forward.
This means that no accelerated monitoring is required under the Current GWDP for the first
quarter of 2010. Accelerated monitoring for subsequent quarters will depend on the application
of Part l.G.l ofthe Current GWDP to results from groundwater samples required to be taken in
the first quarter of 2010 and from any subsequent sample results. The notice requirements of
Part I.G. l.a) ofthe Current GWDP will apply to any exceedances observed in groundwater
samples required to be taken in the first quarter of 2010 and from any subsequent sample results.
Accordingly, the January 27 accelerated monitoring sample was not required to be performed
under the Current GWDP; hence this is a Notice under the Previous GWDP, and the results are
compared to the GWCLs in the Previous GWDP.
If you have any questions or require any ftirther information, please contact the undersigned.
Yours truly,
Jo Ann Tischler
Director, Compliance and Permitting
cc: David C. Frydenlund
Ron Hochstein
Harold Roberts
David Turk
DENISO
MINES
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