DRC-2009-003508 - 0901a06880130e1e

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DENISOIsr^i
MINES
Denison Mines (USA) Corp.
1050 17th Street, Si]ite 950
Denver, CO 8026S
USA
Tel: [phone]
Fax: [phone]
www.denlsonmtnes.com
Dane L. Finerfrock, Executive Secretary August 6,2009
Utah Radiation Control Board
Utah Depaitment of Environmental Quality
168 Noith 1950 West
P.O. Box 144810
SaltLakeCity.UT 84114-4810
Re: State of Utah Ground Water Discharge Permit No. UW370004 (the "GWDP") White
Mesa Uranium Mill - Notice Pursuant to Part I.G.l(a)
Dear Mr. Finerfrock:
The White Mesa uranium mill (the "Mill") completed its 2 quaiter, 2009 groundwater sampling
under the GWDP on May 13, 14, 16, 18 27, and 29, 2009. The final analytical results of these
samplings were received by Denison in four separate batches on July 7,9,14 (two sets), 2009.
Under the GWDP it is intended that background groundwater quality will be determined on a well-by-
well basis, as defined by the mean plus second standard deviation concentration. The Mill is currently
in the process of working with the Utah Division of Radiation Control to establish background
(including the mean plus standard deviation) for all of the constituents being sampled under the
GWDP. Until background is established, the GWDP requires that constituent concentrations in each
monitoring well shall not exceed the Groundwater Control Limits ("GWCLs") iset out in Table 2 of the
GWDP.
Pursuant to Part I.G. 1 .a) of the GWDP, please take notice that the concentrations of the following
constituents in the following monitoring wells sampled for the 2"^ Quarter, 2009 (including the semi-
annual sampling regimen) exceeded their respective GWCLs in Table 2 of the Permit:
Table 1 - GWCL Exceedances for the Quarter
liiVlcmitoring Well
m (Water Class)
MW-3 (Class III)
li||c||ii|imiii|
Selenium
Uranium
mmmmmmmM iiiiiwPliiiii
25
15
Sample Result
(ufiflL)
32.4
18.6
Monitoring Well
(Water Class)
MW-5 (Class II)
MW-12 Class (III)
MW-14 (Class in)
MW-15 (Class III)
MW-17 (Class III)
MW-18 Class II)
MW-26 (Class III)
MW-32 Class III)
ll^ilCbiistiiiii^
Manganese
Uranium
Manganese
Uranium
Selenium
Uranium
Uranium
Thallium
Manganese
Uranium
Chloroform
Dichlormethane
Cadmium
Iron
Manganese
mmmmmmm
«;ie;:i;M;(ufi/Ii)si.:;UfiSs!;;
200
15
400
15
25
15
15
0.5
400
15
35
15
2.5
5,500
400
Sample Result :
(ufi)TL) '
249
16.7
1,940
60.5
110
45.6
26.4
2.5
1,120
32.1
2,600
47
2.98
7,600
4,640
Unless the compliance status for any constituents in any wells is determined otherwise by the
Executive Secretary, the Mill will, pursuant to Part I.G.l.b)l) of the Permit, commence or continue, as
the case may be, accelerated sampling of each of the foregoing constituents in its respective well on a
monthly or quarterly basis, as applicable, and as set forth below. It should be noted that no new
constituents at any well locations were added to the accelerated program as a result of this sampling
event.
Table 2 - Accelerated Monitoring Requirements as of August 6,2009
Monitoring
Well
(Water Class)
MW-1
(Class n)
§g^(^^LJNj^^mi
Tetrahydfofuran
Manganese
• -Normal
Frequency bf
Sampling
Semi-Annual
Semi-Annual
Accelerated
Frequency bf
Sampling
Quarterly
Quarterly
Commencement
of Accelerated
Monitoring
4*" Quarter 2005
1'' Quarter 2006
DENISOhT^i
MINES
Monitoring
; Well
(Water Class)
MW.3
(Class ni)
MW-5
(Class II)
MW-12
(Class III)
MW-14
(Class III)
MW-15
(Class III)
MW-17
(Class III)
MW-18
(Class n)
MW-19
(Class II)
:iliCbnSpuiwi^
Manganese
Selinium
Thallium
Uranium
Tetrahydrofuran
Manganese
Fluoride
Tetrahydrofuran
Manganese
Uranium
Manganese
Uranium
Selenium
Uranium
Uranium
Thallium
Thallium
Uranium
Manganese
Fluoride
Selenium
Thallium
Uranium
Nitrate
Normal
Frequency of
Sampling ,
Semi-Annual
Semi-Amiual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Quarterly
Quarterly
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Annual
Semi-Armual
Semi-Annual
Semi-Annual
Semi-Aimual
Semi-Armual
Semi-Annual
Semi-Annual
Accelerated .
Frequency of
Sampling ':
Quarterly
Quatteriy
Quatterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Monthly
Monthly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Commencement
of Accelerated _
Monitoring
1" Quarter 2006
3'^ Quarter 2006
4'" Quarter 2005
4"^ Quarter 2005
3"'Quatter2006
4"* Quarter 2005
4"'Quarter 2005
1" Quarter 2006
4'" Quarter 2005
4'" Quarter 2005
June 2005
June 2005
4*" Quarter 2005
4"^ Quarter 2005
4'" Quarter 2005
1'' Quarter 2006
4'" Quarter 2005
4*" Quarter 2005
January, 2008
1''Quarter 2006
4'" Quarter 2005
1" Quarter 2006
4"* Quarter 2005
1"'Quarter 2009
DENISOhTi^i
MINES
Monitoring iiliPeiilllS
(Water Class)
MW-26
(Class III)
MW-32
(Class III)
siiiCbnstltpriilili
Manganese
Uranium
Chloroform
Dichloromethane"
Cadmium
Iron
Manganese
Nickel
Gross Alpha
iFpqujwicyfb^
iSiampiii^iii
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quatterly
IBlllilB
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Monthly
Commencement
lio|s||idi||ffi|^i
ftsMMitbfinllii
June 2005
June 2005
June 2005
September 2005
June 2005
June 2005
June 2005
June 2005
March 2007
If you have any questions or require any further information, please contact the undersigned.
Yours truly.
Steven D. Landau
DENISON MINES (USA) CORP.
Manager, Environmental Affairs
cc: Ron Hochstein
Harold Roberts
David Frydenlund
David Turk
DENlSONi/i
MINES