DRC-2009-002223 - 0901a0688011b973

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From: Steve Landau <[e-mail]>
To: "[e-mail]" <DFINERFROCK(gutah.gov>
CC: "[e-mail]" <[e-mail]>
Date: 6/1/2009 4:38 PM
Subject: 1 st Quarter 2009 DIVIT Report
Attachments: Scan001.PDF
Dear Mr. Finerfrocl<,
Please find attached the Discharge Minimization Technology Performance Standard Monitoring Report for the 1st Quarter of 2009.
If you should have any questions regarding this report, please contact me.
Sincerely,
Steven D. Landau
Steve Landau
Manager, Environmental Affairs
t: [phone] | f: [phone]
1050 17th Street, Suite 950, Denver, CO 80265
DENISON MINES (USA) CORP
www.denisonmines.com<http://vvwv>^.denisonmines.com/>
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White Mesa Uranium Mill
DMT Performance Standard Monitoring Report
State of Utah
Groundwater Discharge Permit No. UGW370004
1st Quarter
January through March
2009
Prepared By:
Denison Mines (USA) Corp.
1050 17*^ Street, Suite 950
Denver, CO. 80265
June 1, 2009
DM1' PERFORMANCE STANDARD MONITORING REPORT
1.0 Measurements Taken During the Quarter
During the Quarter, the following DMT Monitoring was performed or addressed, as
required under Part I.E.6 of the Permit:
-Weekly tailings wastewater pool elevations for tailings Cells 1, 3 and 4A;
-Monthly slimes drain water levels;
-Weekly wastewater level measurements in Robert's Pond; and
-Weekly feedstock storage area inspections.
2.0 Weekly Tailings Waste Water Pool Elevation Monitoring
Mill personnel monitored and recorded weekly the elevation of wastewater in Tailings
Cells 1, 3 and 4A to ensure compliance with the maximum wastewater elevation criteria
mandated by Condition 10.3 of the Mill's Radioactive Materials License. These
measurements were made from an elevation survey. The results of such monitoring,
reported as feet above mean sea level (fmsl), are included in Attachment A.
Condition 10.3 of the Mill's Radioactive Materials License provides that freeboard limits
for Cells 1 and 3 shall be set in accordance widi procedures that have been approved by
the U.S. Nuclear Regulatory Commission. Under those procedures:
(i) The fieeboard limits aie set as per the January 10, 1990 Drainage Report for Cell
1 at a liquid maximum elevation of 5,615.4 fmsl; and
(ii) The freeboard limit for Cell 3 is determined annually using a formula set out in
the procedure. The current freeboard limit for Cell 3 was previously calculated
under this procedure at 5,601.6 fmsl. However, in UDEQ correspondence dated
November 20, 2008 an interim variance and limit was established at 5,602.5 fmsl.
(iii) In conjunction with the variance established under (ii) above, an interim
maximum elevation for Cell 4A was also established at 5,593.74
In addition, Part I.D.2 of the Permit provides that under no circumstances shall the
freeboard of any tailings cell be less than three feet, as measured from the top of the
flexible membrane liner ("FML"). The top of the FML in Cell 1 is at 5,618.5 fmsl and
the top of the FML in Cell 3 is at 5,608.5 fmsl. This means that the maximum
wastewater pool elevations in Cells 1 and 3 permitted under Part I.D.2 of the Permit are
5,615.5 and 5,605.5 fmsl, respectively.
As indicated in the table below, the waste water pool elevations in Cells 1 and 3, as
measured during the Quarter, did not exceed these regulatory standards:
Table 1 - Summary of Waste Water Pool Elevations
Tailings
Cell
Celll
Cell 3
Cell 4A
Maximum
Wastewater Elevation
Measured During
Quarter (fmsl)
5,613.4
5,603,05
5,588.4
the
Maximum
Wastewater Elevation
Permitted Under
License Condition
10.3 (fmsl)
5615.4
5,602.5'
5593.74'
Maximum
Wastewater
Elevation Permitted
Under Part LD.2 of
the Permit (fmsl)
5,615.5
5,605.5
5593.74'
Note: Literim maximum elevations of 5,602.5 fmsl and 5,593.74 fmsl for Cells 3 and
4A, respectively have been established in con-espondence from UDEQ dated November
20, 2008. The miximum elevation of 5,593.74 fmsl for Cell 4A has been set assuming
that the total PMP volume for Cells 2, 3 and 4A will be accomodated in Cell 4A. By
letter dated December 11, 2008 Denison applied for an amendment to its Radioactive
Materials License to set the freeboard limit for Cell 4A at 5,593.74 fmsl and to eliminate
the need to set a freeeboai-d limit for Cell 3, given that the freeboard limit of 5, 593.74
fmsl for Cell 4A is adequate to accommodate the total PMP volume for Cells 2, 3 and
4A.
3.0 Monthly Slimes Drain Water Level Monitoring
Pursuant to Part 1.F.2 of the Groundwater Dischai'ge Permit and correspondence from the
UDEQ dated February 7, 2008, the results of monthly recovery monitoring of the slimes
drain for Cell 2 are to be recorded and included with the results of quarterly monitoring in
the Quarterly Report. In accordance with these requirements, the monthly readings and a
graph showing the initial reading and the final reading for each month are included as
Attachment B. These readings ai'e to be collected during a 90 hour recovery period after
the slimes drain pump has been turned off in order to determine the static water level in
the drain (head) after this short cessation in pumping.
In Part l.E.6.b) of the Permit this requirement shall apply to Cell 3 only upon initiation of
tailings de-watering operations. As Tailings Cell 3 is currently an active tailings cell and
de-watering operations have not commenced, no such measurements will be made in the
slimes drain access pipe for Cell 3 in the foreseeable future.
4.0 Weekly Wastewater Level Monitoring: Roberts Pond
Mill personnel monitored and recorded weekly, commencing on March 8, 2005, the
effective date of the Permit, the wastewater levels at Roberts Pond to determine
compliance with the DMT operations standards in Part I.D.3. of the Permit. Part 1.D.3 of
the Permit provides that the water level in Robert's Pond shall not exceed an elevation of
' An interim maximum wastewater elevation was established in conespondence dated November 20, 2008
5624 fmsl. The results of such monitoring, reported as feet above mean sea level (fmsl),
are included in Attachment A.
The maximum wastewater elevation measured in Robert's Pond during the quarter of
5,620,86 fmsl did not exceed the maximum permitted elevation of 5,624 fmsl.
5,0 Weekly Feedstock Storage Area Inspection
Weekly feedstock storage area inspections were performed by the Radiation Safety
Department, commencing on March 8, 2005, the effective date of the Permit, to confirm
that the bulk feedstock materials are stored and maintained within the defined area
described in the Permit and that all alternate feedstock located outside the defined
feedstock area are maintained within water tight containers. The results of these
inspections are recorded on the Weekly Mill Inspection Forms, which are available at the
Mill for inspection. No variance in stored materials from this requirement or leaking
alternate feedstock drums or other alternate feedstock containers were observed during
the inspections.
6.0 Signature and Certification
This document was prepared by Denison Mines (USA) Coip. on November 28, 2008.
DENISON MINES (USA) CORP.
By:
David Cv Frydfenlund
Vice PresidentVRegulatory Affairs and Counsel
Certification:
I certify, under penalty of law, that this document and all attachments were
prepared under my direction or supei-vision in accordance with a system designed to
assure that qualified persormel properly gadier and evaluate the information submitted.
Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the infonnation submitted is, to the
best of my knowledge and belief, true, accurate and complete. I am aware that there are
significant penalties for submitting false information, including the possibility of fine and
imprisonment for knowing violations.
David C. Frydenlund
Vice President, Regulatory Affairs and Counsel
Denison Mines (USA) Corp.
Attachment A
mONmLY HEAD SSEASHREMENT TEST
Location
Slimes Cell # 2
0700
0800
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1000
1100
1200
1300
1400
1500
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Date
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MONTHLY HEAD MEASUREMENT TEST
Location
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1000
1100
1200
1300
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Date
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Comments
MONTHLY HEAD MEASUREMENT TEST
0700
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1100
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1300
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1500
SllmosCell #2 Sampler -T^.^^^ tl^^/hd^y
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Attachment B
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