DRC-2011-008556 - 0901a068809be150

Department of
Environmental QualitY
Amanda Smith
Executive Director
DTVISION OF RADIATION CONTROL
Rusty Lundberg
Dirc(lor
8nG- 201 1_ CI tt7 2w
tr7{[ ,
State of Utah
GARY R. HERBERT
Goventor
GREG BELL
Lieutenant Governor
August 3l,20Ll
CERTIFIED MAIL
(Retum Receipt Requested)
Ms. Jo Ann Tischler
Director, Compliance and Permitting
Denison Mines (USA) CorP. (DUSA)
1050 l7h Street, Suite 950
Denver, CO 80265
Dear Ms. Tischler:
SUBJECT: May 31, 20Il White Mesa Mill Discharge MinimizationTechnology @Mf) Performance
Standard Moniroing Report (DMT Report), and Cell4A BAT Perforunance Standards
Monitoring Report tCeti+a BAT Report) for the lst Quarter, 201l, Submitted as a Single
Volume; Findings and Closeout Letter
we received the subject combined DMT and Cell4A BAT Reports for the l't Quarter, 2011, dated May 31,
2011. These two reports were submitted as a combined single bound volume under one title, as described
in the subject block above. An electronic copy of the volume was also submined on compact disk' We
have reviewed this information, and recognize the following items:
l. Weekly tailings wastewater pool elevations for Cell 48 were not taken during the l't Quarter of
2011. This deficiency was reported by DUSA in a letter to DRC dated June 6,2011. This will be
addressed by DRC outside this report review, under separate cover.
2. In Section 3.0 of the subject volume, in the sixth and last paragraphs, water surfiace measurements
for Cell 4A are discussed. These paragraphs reference the DRC letter of March 15, 201 1. While it
is correct that water surface -"usur"-"nts for Cell 3 are no longer required by the latest DMT and
BAT O&M Plans, weekly water surface measurements for Cell4.A are still required by the plans
(See DMT plan, Section a. t.O ana BAT O&M Plan p. 12, paragraph under "solution Elevation").
Measurements for Cell 44 are necessary to determine the allowable leakage for Cell 4A during
each quarter'
The last sentences, in both the sixth and last paragraph of Section 3.0, need to be corrected. They
should state that water level elevation survey measurements for Cell 4A still need to be conducted,
rather than the current that elevation survey measurements in Cell 4A are no longer required-or
conducted. These statements in these paragraphs must be corrected in the upcoming20ll2""
Quaner RePort.
3. In Attachment "A" of the subject volume, a table titled, Tailings Pond Elevations, I'r Quarter
195 North 1950 West'Salt Lake City' UT
Mailing Addiess: P.O. Box 144850'Salt Lake City, UT 841 l4-4850
Telephonl (801 ) 536-4250' Fax (801 ) 533'4097' T.D.D. (80 I ) 536-44 I 4
n,tr'y'. de q .uta h. Eov
Printed on 100% recycled PaPer
Page 2
Elevations 2011 is provided. In the column underlined "Cell 4A," no solution elevations are
provided for the weeks of 3llll20l1 through 4lll20ll, and the verbiage, "No Longer Required" is
shown. These readings must be reinstated, and the "No Longer Required" verbiage removed from
the table, in the upcomin g2Oll2'd Quarter Report.
4. In section 6.0 of the report, it is noted that during the week of March 20,201I the road grader hit 4
drums of KF Alternate Feed that is stored in steel drums on the Ore Pad. The four drums were
placed in steel over-pack drums and placed back into the stockpile'
5. Section 7.0 of the report discusses liner repairs underway for the Cell I liner, as a result of
discovery of leakage in the Cell 1 Leak Detection System (LDS) on June 2,2010 and later on
August 7 ,2010. As approved in a DRC Confirmatory Action Letter (CAL) dated September 22,
2010, DUSA has committed to complete repair of these leaks by July 31, 2012, and submittal of
the required repair report by December 1,2012.
6. No leakage is noted each week of the 1" Quarter in the LDS inspections for ihe New
Decontamination Pad (NDP) Sedimentation Tank at the mill. The report notes that repairs to
observed cracks in the pad were completed, although the cracks were less than l/8-inch in width.
DRC authorized use of the NDP on February l,20ll.
7. LDS Monitoring. Section 9.I of the subject report states that during the quarter there were no
failures of any LDS pumping or monitoring equipment not made operational within 24-hours of
discovery. However for reference, by letter dated July 6,2011 DUSA informed DRC that the Cell
4A LDS electronic log has had a period of non-operation from June 3, 201 1 through June 27 ,2011.
This will be addressed by DRC outside this report review, under separate cover.
Cell 4A had a total collected leakage for the quarter of 3,160 gallons, compared to allowable
leakage of 23,955 gallons per day. The allowable leakage rate for Cell 4B was 460.8 gallons per
acre-day (based on the table in the BAT O&M Plan) or 18,432 gallons per day for 40 acres, with
the maximum height of water in the cell at 5581.l0 fmsl as measured May 3l, 201 1. New Cell 48
had a total collected leakage and collected condensate volume of 310,433 gallons or 4,927 gallons
per day for the 63 days the cell was in operation. The leakage rate in Cell 48 was well below the
maximum limit.
We have no further cornments on the subject volume. Therefore our review of this item is hereby closed'
out. If you have any questions regarding the above, please contact Mr. Dave Rupp of my staff.
UTAH WATER QUAI-ITY BOARD
WuauSRusty Lundberg
Co-Executive Secretary
DAR:dr
Cc: Phillip Goble, DRC
F:\drupp\DtJSA\GwDPrelated docS\DMT\201 I lst Qtr Findings & Closeout lf,tler.doc
2010 4th Qtr Report Reference: DRC-201 1-002214
Page I of 1
Dave Rupp - Re: Liner Damage and Repair Notice
From:
To:
Date:
Subject:
CC:
Dave RuPP
Steve Landau
s12U2009 4:31 PM
Re: Liner Damage and RePair Notice
Loren Morton
Steve,
we are in receipt a record of DUSA,s verbar notification on May 15, 2009, and your notification letter on the subject dated May
19, 2009. Thank you.
-iou,.
statement that the repair will ue .ompr"ted in "several days" does not meet our interpretation of a
schedule, as required by the permit part LG. and ihe Liner Maintenance Provisions of the DMT Plan' Therefore, please inform
us of the schedule date for repair completion and submittal of the Repair Report. we request you provide these dates prior to
5 ?.r. on MaY 28,2009. - -
David A. RuPP, P.E.
Utah Division of Radiation Control
P. O. Box 144850
Salt Lake CitY, UT 84114-4850
ietepr'one (e6r) sso-+ozs
Fax (801) s33-4097
Email: [e-mail]
>>> Steve Landau <Slandau@denisonmines'com> 511912009 5:07 PM >>>
Dear Mr. Finerfrock,
please find attached a written notice in accordance with Part 1.G.3.(a) of the GWDP for the white Mesa Mill' The notice
pertains to a repair of the liner in cell 1 on the dyke, and above the pond solution level. This is a follow-up to the oral
notification given the uDEQ Emergency Reporting staff on May 15, 2009'
Shouldyouhaveanyquestionsregardingthisnotice,pleasecontactme.
Yours trulY,
Steven D. Landau
Manager, Environmental Affairs
Steve Landau
f,4anager. Enviranmental Affairs
t: [phone] | f: [phone]
rriso iztr Street, Suite 950, Denver, CO 80265
DENISoN MINES (USA) CORP
www. d e oi-Sq n mj.0e9' cA!0
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State of Utah
JON M. HI.'NTSMAN, JR.
Governor
GARY HERBERT
Lieulenant Governor
' April 7,2009
ofepartment of
Environmental Quality
William J, Sinclair
A c ting Executiv e D irec to r
DTVISION OF RADIATION CONTROL
Dane L. Finerfrock
Director
CERTIFIED MAIL
(Return Receipt Requested)
Mr. Steven D. Landau
Manager of Environmental Affairs
Denison.,Mines (USA) Corp. (DUSA)
1050 17th Street, Suite 950
Denver, CO 80265
Dear Mr. Landau:
SUBJECT: March 2,2OOg Wite MTsa Mill Discharge Minimization Technologlt @Mf)Performance Standard Monitoring Report, (DMT Monitoring Report) 4th euarter.2008; February 2,2009 DUSA Letter regarding DMT tvtonit[rinj Report, 3)d
----'
Quarter, 2008; December 17,2OO8 DRC Letter: Request for AdditionalInformation and Confirmatory Action Letter;.December l, 200g DMT MonitoringReport, 3'd euarter, 200g; NOTICE oF NONCOMPLIANCE, upcomingPermit Modifications and Potential for Future F.nforcement Action
we have reviewed !!" 3'o and 4th Quarter, 2008 Reports listed above, and have discovered severalitems of concern with respect to the slimes drain mtnthly recovery head test monitoring of Cell 2at the White Mesa Mill. These problems, in tum, also effect the annual slimes drain recovervhead report, required by Part I.F.11 of the Permit, and submitted by DUSA u, u p* oiih;;d
Quarter report. We wish to identiff these concems to Denison Mines (USA) Corp. and advise youabout upcoming changes to your Ground water Discharge permit.
References:
A. The current DUSA Wite Mesa Mill Taitings Management System and DischargeMinimization Technology @MD Monitoring Plan,under Slimes Drain Water Leve'i Monitoring,paragraphs 3.1.b.v and 3.l.b.vi state the following:
3.1.b.v "Depth to wastewater in the Cell2 slimes drain access pipe shall be monitored andrecorded weekly to determine maximum and minimum fluid head before and after apumping cycle, respectively. All head measurements must be made from the samemeasuring point (the notch at the north side of the access pipe), and made to the nearest
168 North 1950 West . Salt Lake City, UTMailing Address: p.O. Box 144850 . Salt Lake Ciry, UT g4l l4_4g50Telephone [phone]. Fax [phone]S2. f.D.O, (801) 5364414
wwta).deq.utah.gov
printed on 100% recycled paper
Mr. Steven D. Landau
April6, 2009
Page2
0.01 foot. The results will be recorded as depth-in-pipe measurements on the Weekly
Tailings Inspection Form;
3.1 .b.vi "On a monthly basis, the slimes drain pump will be tumed off and the wastewater
in the slimes drain access pipe will be allowed to stabilize for at least 90 hours. Once the
water level has stabilized (based on no change in water level for three (3) successive
readings taken no less thSn one (l) hour apart) the water level of the wastewater will be
measured and recorded as a depth-in-pipe measurement on the Monthly Inspection Data
form, by measuring the depth to water below the water level measuring point on the slimes
drain access pipe;"
B. A December 17,2OO8 DRC letter lists problems found in the 3d qtr, 2008 DMT Monitoring
Report. This letter notes that, "Each month in the second and this third quarter reporting periods
of )OOS . . . a 104-hour recovery time was used as the final reading . . . However, the last three
readings are not stabilized as required by the DMT Plan . . . Please explain and justify why the
changing water levels at the end of the recovery tests in question are compliant with the terms of
the DMT Plan, i.e. represent stable conditions'"
C. In a letter dated February 2,2009 DUSA replied to the Decernber 17,2008 DRC CAL, and
stated, "The technicians misunderstood the stabilization requirement, and thouglrt that
stabilization was fulfilled if either the 90 hour stabilization period had been attained 'or' if 3
successive readings revealed no change. They did not realize that both stabilization requirements
must be met . . . on the interpretation that the consecutive readings prong of the test was intended
to deal with circumstances where the wastewater level may stabilize within the 90-hour period."
D. References are made to the current Ground Water Discharge Permit (issued on March 17,
'oo?]' T"31."#16) states, "the permittee shall at all times maintain the average wastewater head
in the slimes drain access pipe to be as low as reasonably achievable (ALAM) in each
tailings disposal cell, in accordance with the currently approved DMT Monitoring Plan.
Compttanci shall be achieved when the average annual wastewater recovery elevation in the
slimis drain access pipe, determined pursuant to the currently approved DMT Monitoring
Plan, meets the conditions in Equation l. . "'Z. Part I.E.7(b) states, "Monthly Slimes Drain Water Level Monitoring: Cells 2 and 3 - the
Permittee shall monitor and record monthly the depth to wastewater in the slimes drain
access pipes as described in the currently approved DMT Monitoring Plan at Tailings
Cells 2 and. 3 to determine the 9l-hour fluid recovery head. For purposes of said
monitoring, the Permittee shall at each tailings cell:
a. Designate, operate, maintain, and preserve one water level measuring point at the
centirline of the slimes drain access pipe that has been surveyed and certified by a
Utah licensed engineer or land surveyor.
b. Make all slimes drain recovery head (depth to lluid) measurements from the same
designated water level measuring point, and
c. Record and report allfluid depth measurements to the nearest 0.01foot."
(
t
Mr. Steven D. Landau
April 6,2009
Page 3
3. Part I.F.11 states,
"Annual Slimes Drain Recovery Head Report - on or before March I of each year the
Permittee shall submit for Executive Secretary approval an annual slimes drain recovery
head report for Tailings Cells 2 and 3. Said report shall conform to the requirements of
Part 1.D.3(b), 1.8.7(b), and II.G of this Permit, and:
a) Provide the individual monthly slimes drain recovery head monitoring datafor the
previous calendar year, including , but not limited to: date and time for the start and end
of recovery test, initial water level, final depth to water and recovery water level elevation.
b) Calculate the average slimes drain recovery headfor the previous calendar year.
c) Demonstrate compliance status with the requirements of Part LD.3(b) and LE.7(b) of
this Permit."
4. Part II.A states, "REPRESENTATIVE SAMPLING. Samples taken in compliance with the
monitoring requirements established under Part I shall be representative of the monitored
activity. "
E. The following specific items are referenced:
1. February 7,2008 DRC Letter: Notice of Enforcement Discretion. This letter states, "On
June 11,2007, September 5,2007,.andDecember 10, 2007 we received the respective reports
on the subject referenced above [", 2nd, and 3'd Quarter 2007 DMT Reports]. We note these
reports do not contain submissions of the monthly slimes drain recovery test monitoring for
Cell2;'
2. April 10, 2008 DRC Letter: Confirmatory Action Letter (CAL) with Comments and
Recommendations. This letter states, ". . . on four (4) inconsecutive months (July, August,
October, and November) of 2007 the cell 2 slimes drain pump was found to be not operating
when the monthly inspectors arrived."
3. March 2,2009 DUSA DMT Monitoring Report, 2008 4th Quarter:(i) Section 6.0 Annual Slimes Drain Head Condition Evaluation(ii) Section 7.0 Signature and Certification
General Observations:
The wording in the current DMT Monitoring Plan noted in reference A above, was included in the
original DUSA plan dated March 14,2007, approved by DRC on May g, 2OO7 . The plan became
enforceable with this approval.
After the May 9,2007 DRC approval, DUSA should have submitted 14 monthly recovery head
tests for the period of 5107 thru 6/08 - that met both the 90-hour minimum duration and the stable
water level criteria that applied. DUSA was noncompliant with these requirements, 93% of the
time, as only one of the monthly recovery head tests performed by DUSA during the
aforementioned 14 month period met the criteria (January 2008).
Following the DRC review of the subject 2008 3'd and 4'h quarter DMT Monitoring Reports,
submitted by DUSA for Slimes Drain Water Level Monitoring, it is clear that only I of the 6
Mr. Steven D. Landau
April6,2009
Page 4
required monthly recovery head tests met both of the DMT Monitoring Plan cntet'.a mentioned
above (the November 2008 test). Therefore, DUSA was noncompliant in 5 of the 6 recovery head
tests performed in late 2008. Further, as this non-compliant data from 2008 is not representative
of the required monitoring, DUSA has also failed to meet the requirements of Part ILA of the
Permit, noted in reference D.4.
Clearly, 90% of the required 2007 and 2008 data provided by DUSA is noncompliant with the
DMT Monitoring Plan recovery head test criteria. Therefore,90o of the slimes drain recovery
data generated by DUSA from May 2007 through December 2008 is non-compliant with the
intent of Parts I.D.3(b), I.E.7(b), and I.F.1l, noted in references D.l-3, above.
As noted in reference C above, in the DUSA letter of Febru ary z,zX}g,it is clear that as of this
date, DUSA understands that the requirements of the DMT Monitoring Plan with respect to
monthly slimes drain water level recovery head test includes both 1) a 90 hour minimum test
period and 2) achievement of a stabilized water level, as represented by three successive hourly
readings with no water level change, measured to the nearest 0.01 foot.
2008 Annual Slimes Drain Recovery Head Report Observations
In response to Part I.F.l I of the Permit (reference D.3 above), DUSA provided its findings of
compliance status as Section 6.0 of an annual report submitted by email on March 2,2OOg (4th
Quarter, 2008 DMT report). This report was later revised and resubmitted by DUSA in an email
of March 10, 2009. However, after review of both submittals, DRC has concluded:
l. Tl,pographical and Calculation Errors - DUSA apparently, has some problem with the
calculations. A 300 foot typographical error was found in Section 6.0 of the 3/2109
submittal, this error was corrected after it was brought to DUSA's attention. Also, each
submitted sigma (X) component entry in this section of the report appears to be based on
multiple arithmetic errors. This statement is based on using the elevation of measurement
point on the slimes drain access pipe of 5,614.83 famsl as provided by Fisher & Sons
Surveylng. For details, see Attachment 1.
2. Missing Monthly Data - In the Ground Water Diseharge Permit, Part LF.l1 (reference
D.3.a above), an annual report from DUSA is to provide the individual monthly data for
the previous calendar year in the annual report. Contrary to this, DUSA did not provide all
the individual monthly data in the report for the previous calendar year (2008)
3. Unsupported Claim of Compliance - As mentioned earlier in this letter, the DUSA
recovery head tests reported for the period of May, 2007 thru December, 2008 had only 2
of 20 (10%) of required tests that met both 9O-hour duration and stable water level criteria.
Since this data mentioned is not compliant with the permit and the plan requirements, the
DUSA claim made in Section 6.0 of the March 10, 2009 version of the 2008 4th Quarter
DMT Report - that the Cell 2 slimes drain recovery head performance is compliant - is
without support or justification.
Mr. Steven D. Landau
April6,2009
Page 5
Conclusions:
1 . Missing Content of Ouarterly DMT Reports - in a March 14,2OO7 DUSA Letter, the
company responded to a January 24,2007 DRC request, and agreed to provide the
monthly slimes drain recovery head test data to DRC, commencing with the I't
Quarter, 2007 report (reference E.l).
Contrary to this commitment, the 1", 2nd and 3d Quarter 2OO7 rcports, dated June 6,
September 4, and December 7,2007 respectively, failed to include this information.
During an October 31,2007 on-site inspection, DRC staff requested this information
from the mill staff who, in an October 31,2007 email, provided this data, up through
September 18,2007.
On February 7,2008 DRC issued a Notice of Enforcement Discretion, regarding Cell 2
slimes drain recovery head submittal requirements for the quarterly DMT Monitoring
Reports (Reference E.l). To that point, DUSA had not submitted any monthly slimes
drain recovery head test monitoring data for Cell 2 via the quarterly reports. Only after
this Notice, did the slimes drain data begin to be submitted via the quarterly reports.
2. Omission of Pump Operation and Maintenance - On April 10, 2008 DRC issued a
Confirmatory Action Letter (CAL) with comments and recommendations regarding
slimes drain recovery head data for 2007 at Cell2 (Reference E.2). In this CAL, the
DRC observed for four months in 2007, July, August, October and November, ". . , the
cell2 slimes drain pump was found to be not operating when the DUSA monthly
inspectors arrived." Only after the DRC CAL did DUSA report the pump was always
found to be operational.
3. Inadequate Ouality Assurance in Report Preparation - Two sets of problerns have been
identified:
a. Typographical Errors - On the March 2,2009 DMT Monitoring Report, 2008
4th Quarter data was provided to DRC (Reference E.3(i)). In Section 6.0 of
that report, the Annual Slimes Drain Head Condition Evaluation was provided.
This item was first provided with a 300-foot typographical error in the report,
but was resubmitted on March 10, 2009 with that error corrected.b. Calculation Errors - Review of the March 2,2009 DUSA DMT Report shows
several calculation elrors were made, as evidenced by Attachment l, below.
4. Inadequate Report Certification - Section 7.0 Signature and Certification of the March
2,2009 DUSA DMT Report was also reviewed. This section was signed by an officer
of the corporation and states that, "I certify, under penalty of law, that this document
and all attachments were prepared under my direction or supervision in accordance
with a system designed to assure that quali/ied personnel properly gather and evaluate
the information submitted. Based on my inquiry of the person or persons who manage
the system, or those persons directly responsiblefor gathering the information, the
information submitted is, to the best of my knowledge and betief, true, accurate and' complete."
Mr. Steven D. Landau
April6,2009
Page 6
Based on the errors discussed above, and elsewhere in this document, it is clear that
this certification was made without adequate direction and supervision.
In summary, DRC has concems with respect to slimes drain water recovery head test monitoring
and reporting for Cell? at the mill. It appears that almost all data received from DUSA for slimes
drain water level monitoring from the time of the DMT Monitoring Plan approval in May 2007
through the 3d and 4th Quarters of 2008 is non-compliant with the DMT Monitoring Plan and
Permit requirements. As a result, the DUSA claims in the March 2 and 10, 2008 reports that the
Cell2 slimes drain recovery testing is compliant with existing Permit requirements is
unsubstantiated.
Please be advised that in order to rectiff the above concerns, the DRC will modifu the Permit to
revise performance standards, monitoring requirements, and reporting mandates for the subject
monthly slimes drain recovery head testing, and arurual report and compliance determination.
Further, be advised that based on statements made in the February 2,2OOg DUSA letter, it is clear
that DUSA understands that compliance with existing Permit requirements means that the
monthly slimes drain recovery tests must meet both criteria, i.e., 1) a test duration of at least 90-
hours, AND 2) achievement of stable water level conditions at the end of the test, as measured by
three consecutive hourly water level readings, measured to the nearest 0.01 foot; with no change
in water level.
DUSA must become more pro-active in providing intemal QA control in areas of both test
performance and report preparation. Further, we encourage DUSA to come to DRC with
revisions to the DMT Plan, or other plan required by the Permit, immediately after a problem is
identified.
UTAH WATER QUALITY BOARD
DAR:LM:DLF
cc: David Frydenlund, DUSA
Ron Hochstein, DUSA
Attachment
F:\drupp\DUSA\GWDPRelated Items\DMT Documents\2008 Reports9ltems of Concem 04-01-09
File: DUSA Gmund Water File l37A
Dane L. Findzftock
Co-Executive Secretary
IDepart
ironme
Dave Rupp @-=,
March 30,2009
DUSA White Mesa Uranium Mill Slimes Drain Recovery Head Testing: Technical
Memorandum on Changes Proposed to the Ground Water Discharge Permit for
Slimes Drain Head Recovery Testing
This MEMO discusses some of additional technical issues related to proposed changes to the Ground
Water Discharge Permit slimes drain recovery head testing. Attached are several graphs and tables to
support this narrative. Some proposed changes to the subject Permit were provided in the DRC MEMO of
fvfaicfr 24, ZOO9, subject on proposed Ground Water Discharge Permit changes. After closer review of
these changes it appears theie changes should be revised slightly, as discussed below' This memorandum
supplemenis and updates the March 24,2009 memo. Collection and reporting elrors by the owner are
discussed extensively in the April l,2OOg letter to DUSA, subject: NOTICE OF NONCOMPLIANCE'
Upcoming Permit Modifications and Potential for Future Enforcement Action.
As documented previously, the basic errors resulted from DUSA not meeting two important criteria of the
slimes drain recovery tread testing. DUSA usually did not concurrently allow the head to recover for at
least 9o-hours, and then obtain three (3) successive readings with no change in the water level. This dual
requirement is given in the DMT Monitoring Plan, Section 3.l.b.vi.r This information is shown in
Enclosure A attached, as well as the footnote below.
This dual criteria was met only twice (January and November 2008) during 2OO7 and2008 calendar years.
Tables and graphs of recovery head testing information is shown on Enclosure B, attached. Information is
printed on both sides of the enclosure.
one of Enclosure B, the results of all the 2007 recovery head testing is tabulated. None of the tests
met the dual criteria above. In a contrasting point of view, tn 2007 , eight (8) of the twelve ( 12)
were reported as static. However, as stated earlier none met the dual recovery head testing criteria'
the reported static tests mentioned involved the slimes drain pump not working for an
I .,on a monthly basis, the slimes drain pump will be tumed off and the wastewater in the slimes drain access pipe will be allowed to stabilize for
atleastg0hours. Oncethewaterlevelhasstabilized(basedonnochangeinwaterlevelforthree(3)successivereadingstakennolessthanone(l)
hour apart) the water level of the wastewater will be measured and recoided as a depth-in-pipe measurement on the Monthly Inspection Data form,
Uy measuing the depth to water below the water level measuring point on the slimes drain access pipe;"
I 68 North 1950 West ' Salt Lake City, UT
Mailing Address: P.O. Box 144850'Salt take City, UT 84114-4850
Telephone [phone]' Fax [phone]' T.D.D. [phone]
www.deq.utah.got
Printed on 1007o recYcled PaPer
Env
ment of
ntal Quality
State of Utah
JON M. HUNTSMAN, JR
Governor
CARY HERBERT
Lieutenant Governor
TO:
FROM:
DATE;
SUBJECT:
On page
in 2C07
readings
Four of
,l-tsn
William J. Sinclair
Acting Executive Director
DIVISION OF RADIATION CONTROL
Dane L. Finerfrock
Direttor
MEMORANDUM
File Denison Mines (USA) Corp. (DUSA)
Ground Water File 137A
Technical Memorandum
March 30,2009
Page2
undetermined amount of time, when the DUSA inspectors arrived. Only one measurement was taken by
the inspectors, for each of these months, an assumption that the head was static. The four other tests durini2007, reporting that the head was static, varied in duration, from 26 to 53 hours. However, the staticphenomenon shown by these points may potentially have been a temporary local maximum, graphically
speaking, if the test were allowed to run or be timed out for at least 90-hours for the p-u.po."r of
consistency.
On page two of Enclosure B, it shows only the January and November 2008 readings met the dual criteriain the 2008 calendar year. In a contrasting point of view, for 2008, the February and December points didnot have the minimum 9O-hour recovery period, but they did show 3 static readings. Again, the staticphenomenon shown by these two points may potentially have been a temporiry local maximum,graphically speaking, if the test were allowed to run or be timed out for at least gb-trours for the purposes
of consistency.
Enclosure C contains several graphs, which are depictions of some of the exfemes recorded for recoveryhead testing. Page 1 of Enclosure C shows the shortest recovery curve with "static" results, shown by atable and graph of the recovery head test for September 17,2007. The water has the appearance ofbecoming static at 24-hours at 9.58 feet below the measuring point. The caveat discussed above for shortterm tests may apply- Page 2 of enclosure C shows the longest recovery curve with no static results. Therecovery head test was on May 5, 2008. The head at 168 hours has not become static, with the last readinggiven at 10.52 feet below the measuring point. Page 3 shows the longest recovery curve with static results.
This is the compliant recovery head test on November 24,2008. This test complied with the dual criteriaof the DMT Plan' The head at 122 hours had become static, with the last reading given at 11.50 feet belowthe measuring point. Page 4 shows a 74-hour recovery head test, a near 90-hour iest, with "static" results.It is the recovery head test on December 18, 2008. The head had the appearance of becoming static at 7lhours or less than 9O-hours at 11.75 feet below the measuring point.
It does not seem logical that the recovery head could stabilize in such rapid periods as shown for the fourrapid tests in 2007 . This statement is supported by comparing some othei tesis. In 2008 five (5) tests wererun for 1O4-hours without reaching stability. These four tests were compared to two other tests which rani68-hours each, also without reaching stability. The recovery head tests continued to rise another 1.3-feet
and 0.98-feet respectively for May 2008 and June 2008. This is shown on the table at the bottom of page Zof Enclosure B, left of the graph. Such results discredit the use of reporting shorter term tests.
The DMT Monitoring Plan was not approved until May 9, 2007 . Technically, prior to that date, the reports
were not required to meet these criteria. So, l8l2o or 907o of the data did not meet the plan's criteria. Dueto this lack of valid data, DUSA's Annual Slimes Drain Recovery Head Report submitted as Section 6.0 ofthe 2008 4ft Quarter DMT Monitoring Report could not be reviewed by DRC without speculation.
Therefore conclusive findings about DUSA compliance in 2008 cannot be made of defended at this time.
The proposed changes to the Ground Water Discharge Permit were shown in Parts I.D.3, I.8.7, and I.F.2 in
the red-lined copy attached to the March 24,2009 memorandum. These wording changes are primarily toclarify and assure the dual criteria discussed is used in all future recovery head tists. Originally, it
appeared that it would be prudent to revise the Equation in Part I.D.3. After closer review of thlse changesit appears the original equation need not be changed. The original changes, as proposed, should be revised
as discussed below:
Entries for the "Source of Data By Calendar Year for Equation I Variables" Table in Part I.D.3b).1 of theGround Water Discharge Permit are proposed to be revised in my March 24, ZOO1 memorandum. Thepurpose of this revision is to capture time lost as a result of the 2007 and the majority of the 200g data
Technical Memorandum
March 30,2409
Page 3
being unsupportable. It appears an annual Annual Slimes Drain Recovery Head Repor as would be
required by Part LF.ll for 2009 has an inadequate base of valid comparable data for 2008. Thus, a report
for 2009 seems unsupportable as well. It appears the equation as originally written will support an annual
report for 2010 A.D.
Since it appears the equation as originally written will support an annual report for 2010 A.D. Therefore,
only the entries for the equation need to be updated, as attached. With this table update, the first year of
where an annual report would be supported by the new equation would be 2010 A.D., using data from 2009
as a support. If the previous edition of the equation is maintained, the earliest year for an annual report,
supported by a fully year ofdata would be the year 2010 as discussed above.
Attachments
1. Tables and Graphs Enclosures A through C
2. Proposed Ground Water Discharge Permit Wording Changes
-END-
cc: Phil Goble, DRC
F:\DUSA\GWDP Related\DMT Documents\2008 Reports\2008 TechMEMO3-30-09GWPermit Changes.doc
File: DMT 1/4ly Monitoring Reports l37A
State of Utah
JON M. HUNTSMAN, JR.
Govemor
GARY HERBERT
Lieutenant Governor
TO:
FROM:
DATE:
Environmental Quality
William J. Sinclair
Aling Executive Director
DTVISION OF RADIATION CONTROL
Dane L. Finerfrock
Direttor
MEMORANDUM
File Denison Mines (USA) Corp. (DUSA)
Ground Water File 137A
Dave Rupp /4--
March 24,2009
SUBJECT: March 2,2009 White Mesa Mill Discharge MinimiTation Technology (DMT) Performance
Standard Monitoring Report,4th Quarter, 2008; February 2,2009 DUSA Response Letter:
W.M.M. DMT Performance Standard Report 3'd Quarter 2008-UDEQ Request For
lnformation; Changes Proposed to the Ground Water Discharge Permit for Slimes
Drain Head Recovery Testing.
On February 26,2009 Mr. Steven Landau of Denison Mines (USA) Corp. (DUSA) telephoned me and
requested that the subject 4ft Quarter report be submitted on March 2,2W9, to which I agreed. The subject
4h Quarter report was received by email on that date.
DUSA had improper data collection and reporting for the subject 3'd and 4ft Quarters of 2008 with respect
to slimes drain recovery head testing for Cell 2, as discussed in the subject February 2,2009 DUSA letter.
This will be discussed at length in the March 2009 DRC Notice of Non-Compliance letter to DUSA,
subject: Items of Concem. After completion, this letter may be found electronically at
F:\drupp\wp\DUSA\ GWDPRelated ItemsU)MT Documents9O08 ReportsVtems of Concern 03-09.
As documented, the basic errors resulted from DUSA not meeting two important criteria of the slimes drain
recovery head testing. DUSA usually did not concurrently allow the head to recover for at least 9O-hours,
and then obtain three (3) successive readings with no change in the water level. This dual requirement is
given in the DMT Monitoring Plan, Section 3.1.b.vi.1 DUSA met both these criteria only once during the
subject two quarters, i.e. the November 2008 reading.
Additionally, from January I,2007 to June 30, 2008, DUSA did not obtain any readings that met these
criteria. However, the DMT Monitoring Plan was not approved until May 9, 2N7. Technically, prior to
that date, the reports were not required to meet these criteria.
I' "On a monthly basis. the slimes drain pump will be turned off and the wastewater in the slimes drain access pipe will be allowed to stabilize for
at least 90 hours. Once the water level has stabilized (based on no change in water level for three (3) successive readings taken no less than one (1)
hour apart) the water level of the wastewater will be measured and recorded as a depth-in-pipe measurement on the Monthly Inspection Data form,
by measuring the depth to water below the water level measuring point on the slimes drain access pipe;"
168 North I 950 West . Salt Lake City, UT
Mailing Address: P.O. Box 144850 . Salt lake City, UT 84114-4850
Telephone [phone]. Fax [phone]. T.D.D. [phone]
\|ww.deq.utah. goy
Printed on 10090 recycled paper
o
rterMEMO 2oog 4th & 3'd Qua
DMT Monitoring Reports
Page2
Due to this lack of valid data, the Annual Slimes Drain Recovery Head Report submitted as Section 6.0 of
the subject 2008 4th Quarter DMT Monitoring Report could not be reviewed by DRC without speculation.
Therefore it was not reviewed.
To help preclude this erroneous data collection and reporting from continuing, the mentioned NONC letter
will be issued as well as changes proposed to the ground water discharge permit for slimes drain head
recovery testing. The Ground Water Discharge Permit uses the following proposed language to more
clearly communicate the dual criteria for the slimes drain recovery head testing:
"After the slimes drain pump is tumed off, the recovery head test shall include a minimum 9O-hour
duration water level stabilization period, together with at least three successive equal water level
readings with no change, measured to 0.01 foot. The water level of the wastewater will be
measured and recorded as a depth-in-pipe measurement on the Monthly Inspection Data form, by
measuring the depth to water below the designated water level measuring point on the slimes drain
access pipe."
This and other proposed incidental changes to the Ground Water Discharge Permit are shown in Parts
I.D.3,1.8.7, and I.F.2 in the attached red-lined copy.
Attachment
-END-
F:IDUSA\GWDP Related\DMT Documents\2008 ReportsV0OS MEMO 4th&3rd DMT 03-09.doc
File: purT l/4ly Monitoring Reports l37A
tv\CN\€n./, A
White Mesa Mill - Standard Operating Revision: Denison-6
PageT of36Book 11: Environmental Protection Manual, Section
(iii)The slimes drain pump in Cell2 is on a timed system, under which it pumps for 15
minutes each hour, thereby allowing the slimes wastewater to recharge for 45
minutes before being pumped again. Based on measurements taken in August 2006,
the water level in the Cell 2 slimes drain recharges to a depth of about 28.50 feet
before each pumping and is pumped to a depth of 38 feet after each pumping, in each
case measured below the water level measuring point on the slimes drain access pipe.
The average wastewater head in the Cell7 slimes drain is therefore about 5 feet. The
depth to water of about 28.50 feet after recharge is below the phreatic surface of
tailings Cell2, which is at a depth of about 20 feet below the water level measuring
point on the slimes drain access pipe. As a result, there is a continuous flow of
wastewater from Cell 2 into the slimes drain collection system. Mill management
considers that the average allowable wastewater head in the Cell 2 slimes drain
resulting from pumping at these intervals is satisfactory and is as low as reasonably
achievable. Based on past experience, cycling the pump more than 15 minutes every
hour can result in more replacement costs for pumps and more resulting system
downtime;
(iv)The Cell2 slimes drain pump is checked weekly to observe that it is operating and
that the timer is set properly, which is noted on the Weekly Tailings Inspection Form.
If at any time the pump is observed to be not working properly, it will be fixed or
replaced within 15 days;
(v) Depth to wastewater in the Cell2 slimes drain access pipe shall be monitored and
recorded weekly to determine maximum and minimum fluid head before and after a
pumping cycle, respectively. All head measurements must be made from the same
measuring point (the notch at the north side of the access pipe), and made to the
nearest 0.01 foot. The results will be recoided as depth-in-pipe measurements on the
Weekly Tailings lnspection Form;
iivi;On a monthly basis, the slimes drain pump will be tumed offand the wastewater in
\ m" slimes drain access pipe will be allowed to stabilize for at least 90 hours. Once
I m" water level has stabilized (based on no change in water level for three (3)
i successive readings taken no less than one (1) hour apart) the water level of the
/ wast.*ater will be measwed and recorded as a depth-in-pipe measurement on theL Monthly lnspection Data form, by measuring the depth to water below the water level
rneasuring point on the slimes drain access pipe;
(vii) No process liquids shall be allowed to be discharged into Cell 2;
(viii) If at any time the most recent average annual head in the Cell 2 slimes drain is
found to have increased above the average head for the previous calendar year, the
Licensee will comply with the requirements of Part I.G.3 of the GWDP, including the
requirement to provide notification to the Executive Secretary oraliy within 24 hours
followed by written notification;
(ix)Because Cell3 and Cell4A are currently active, no pumping from the Cell3 or Cell
44 slimes drain is authorized. Prior to initiation of tailings dewatering operations for
Cell 3 or Cell 4A, a similar procedure will be developed for ensuring that average
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Pad I
Permit No.
o
UGW370004
2.
thick layer of crushed sandstone was prepared and rolled smooth as a FML sub-
base layer. Beneath this underlay, native sandstone and other foundation
materials were graded to drain to a single low point near the upstream toe of the
south cross-valley dike. Inside this layer, an east-west oriented pipe was installed
to gather fluids at the upstream toe ofthe cross_valley dike.
4) slimes Drain collection Layer and System - immediately above the FML, anominal 72-inch (cell floor) to 18-inch (inside sideslope) soil protective blanket
was constructed of native sands from on-site excavated soils (70%) and dewatered
and cyclone separated tailings sands from the mill (30%). on top of thisprotective blanket, a network of 3-inch PVC perforated pipe laterals was installed
on approximately 50-foot centers. This pipe network gravity drains to a 3-inchperforated PVC collector pipe which also drains toward the south dike, where it is
accessed from the ground surface by a l2-inch diameter, inclined HDpE accesspipe. Each run of the 3-inch lateral drainpipe and collector pipe was covered witha 12 to 18-inch thick berm of native granular filter media. etiett closure,
leachate head inside the pipe network will be removed via a submersible pump
installed inside the l2-inch diameter inclined access pipe.
Existing Tailings Cell Construction Authorized - tailings disposal in existing Tailingscells 1, 2, and 3 is authorized by this permit as defined in Tatle 3 and part I.D. l, above.Authorized operation and maximum disposal capacity in each of the existing tailings cellsshall not exceed the levels authorized by the License. Under no circumstances shall thefreeboard be less than three (3) feet, as measured from the top of the FML. Anymodificafion by the Permittee to any approved engineering disign parameter at theseexisting tailings cells shall require prior Executive secretary apfroval, modification ofthis Permit, and issuance of a construction permit.
Existing Facility DMT Performance Standards - the Permittee shall operate and maintaincertain mill site facilities and the existing tailings disposal cells to minimize the potential
for wastewater release to groundwater and the environment, including, but not limited tothe following additional DMT compliance measures:
a) DMT Monitoring Wells at Tailings Cell I -at all times the Permittee shall operate andmaintain Tailings cell I to prevent groundwater quality conditions in any nearbymonitoring well from exceeding any Ground Water Compliance Limit established inTable 2 of this Permit.
b) Tailings cells 2 and 3 - including the following performance criteria:
Deleted: l)
Formattedl Bullets anil Numbering
Formatted: Font: 12 pt
Formatted: Font: 12 pt
FormatEd: Font: 12 pt
Formattedi Font: 12 pt
Formatted: Font: 12 pt
Formatted: Font: 12 pt
Partl O
PermitNo. UGW370004
Equation l:
[IEr+lEy-1+lEy-21/[Nr+Nr-1+Ny-21<[IEv-r +LEv-2+ lEv-:l/[Nvr+Nr-2+Nv-:J
Where:
f,Er-=- S-u1qqf-all-sligrqs-{rqiq lallglgs- !qid- 915:1a1iqn-49aqqr94e-n1s-4a49 qt-tle 9n11-of-eachi'^--,
iciver.v head Gs1 coilected durins the calendar year of interestt-
+i@ qr9 1el!1e{ to-as- qt1ns1{ryr4 1e-cqv-egy-e!eyqti.o4s-. - . -,ii ' .
iSOnfl. prriuant to ffi ap-prored DM1-tvtonitoring Plan, these recovery tests are to be conducted ',.. '
monthly and the SDRE vaiues reported in units of feet above mean sea level (amsl). ",'.
to waterbelow the desisnatedEaJgr]gve]lEe3sgdqspojllqn th=e=sli$Ss=dlqiE- -
access Dipe.
2) Compliance shall be achieved when the average annual wastewater recovery
elevation in the slimes drain access pipe, as determined pursuant tolh5:-cuqently - - -
approved DMT Monitoring Plan, meets the conditions in Equation 1, below:
IEv-r : Sum of all SDRE measurernents made in the year previous to the calendar year of
interest.
IEy_z : Sum of all SDRE measurements made in the second year previous to the calandar
year ofinterest.
IEy_: = Sum of all SDRE measurernents made in the third year previous to the calendar year
ofinterest.
N, : Total number of$@!esE gqn4qcJql-dllmg-Qe c4154@qy-eqr-of lnlqe-s.
Ny-r : Total number of SDREJe-s5 gqndscle!-rqtlq ys4lp,rqtous, Lo-t!E-c4lg4d41y-eqr of -
interest.
Nv-z: Total number SDRE tgsls_eduqtg{qr1hp-sqcgqd-y-eqrpleylogs-tp lh5:-cqlqnlqrygqr-of
interest.
Nv-: : lstal number ofsg&E-!e!t-s goin4ucJql:q t4e- qtg4 yegr-plevio-uq to-the c41end41 y-ear of - -l ,'
Formatted: Font: 12
Deleted:
D€leted! u
Report for
Calendar
Year
Source ofData By Calendar Year fo. Equation 1 Variables (
Ev-r Ev-z Ev-:Nv-t Nv-z Ny_:
2010-200q 200q_200q.2009.200q_2009_
201 L 2010-200q.200q.2010 200q.200q.
20rL 201 2010-200q.201 2010 2009_
II
i\\ \
\\\ \,
Failure to satisff conditions in pquation 1 shall constitute DMT failure and non-
compliance with this Permit. For cell 3, this requirement shall SPPly after
initiation of de-watering operations.
c) Maximum Tailings Waste Solids Elevation - upon closure of any tailings cell, the
Deleted:
Formatted: Indent: Left: 1", First
line: 0"
Deleted:90-hou
Deleted: recovery test collecied during
the mlenda year of interest.
Formatt€d: Indent: First line: 0"
Deleted: slimes drain 90-hou recovery
Deleted: slimes dmin 90-hou remvuY
Deleted: of slimes <lrain 90-hou
recovery
Deleted: slimes drain 90-hou recovery
Deleted:201 I
Deleted: 2008
Deleted: 2oo7
Deletedr 2oo7
Deleted: 2007
D€leted:2007
Deleted:2007
Deletedr 2oo7
D€leted:2009
Deletedr 2oo8
Deleted: 2oo7
Ireleted: 2oo7
Deleted:2008
Deleted: 2007
Deleted! 2007
Deleted: 2010
Deleted:2009
Deleted: 2oo8
D€leted:2007
Deleted:2009
Deleted: 2oo8
D€leted:2007
Part I
7.
Permit No. uGW370004
accordance with the respective manufacturer's procedures and guiderines. ThePermittee shall make and preserve on-site writtin records orr,rZn ,qrip-"rtcalibration in accordance with part II.G and H of this permit. said records shallidentify the manufacturer's and model number of each piece of field equipment usedand calibration.
white Mesa Seep and Spring Monitoring - after approval of the plan required by partI.H.8, this Permit will be modified to require arruuimonitoring orset#ea seeps orsprings on White Mesa.
DMT Performance Standard Monitoring - the permittee shall perform technologyperformance monitoring in accordance t ritt tt e currently approved DMT MonitoringPlan to determine if DMT is effective in minimizing uni "ont othng the retease orcontaminants pursuant to the provisions of parts I.D.l and r.D.: ofihis permit, including,but not limited to the following activities:
qlweekly Tailings wastewater pool Elevation Monitoring: cels I and 3 - the + - -'
Permittee shall monitor and record weekly the erevation-of wastewater in TailingsCells I and 3 to ensure compliance with the maximum wastewater elevation criteriamandated by condition 10.3 of the License. Said measurements shall be made from awastewater level gauge or eleyation survey to the nearest O.Of foot- _b) Monthly Slimes Drain Water Level Monitoring: Cells 2 and3- the permittee shallmonitor and record monthly the depth to wastewater in the slimes drain access pipesas described in thtq-pprmtleld_tbe currently approved DMT Monitoring plan at
Formatted: Bullets and Numbering
Deletedr u
Deleted: 90-hou fluidI*:T:,:"ll:'""*:-':,i:i"i':?'l:r":n:i.rn-:eqa&Lrh;i;=;Ga,p,E, jr-
a' Designate, operat:: maintain, and preserve one water lever measuring point at thecenterline of the srimes drain access pipe that has been ,u-rv"a *o certified by aUtah licensed engineer or land surveyor.
b. Make all slimes drain recovery head test (depth to fluid) measurements from thesame designated water level measuring poini, and
c. Record and report all fluid depth measurements to the nearest 0.0r foot.
For cell 3 these requirements shall appry upon initiation of tailings de-wateringoperations.
c) weekly Wastewater Level Monitoring: Roberts Pond - the permittee shall monitorand record weekly wastewater levels it the Roberts pond to determinl compliancewith the DMT operations standards in Part I.D.3. Said measurements shall be madein accordance to the currently approved DMT Monitoring plan.
20
monitoring, the permittee shall at each tailings cell:
For purposes of said
Part I
Permit No.
o
ucw370004
c) water Table contour Map - which provides the location and identity of all wells
sampledthatquarter,themeasuredgroundwaterelevationateachwellmeasuredin
feetabovemeansealevel,andisocontourlinestodelineategroundwaterflow
directions observed during the quarterly sampling event'
d) Quality Assurance Evaluation and Data validation - including a written description-'
"]ra fnOings of all quality assurance and data validation efforts conducted by the
Permittee in compli'anc"'*ittt ttt" Groundwater Monitoring Quality Assurance Plan'
Saidreportshallverifftheaccuracyandreliabilityofthegroundwaterquality
compliance data, after evaluation of sample collection techniques and equipment,
sample handling and preservation, analytical methods used' etc'
e) Non-conformance disclosure - with each quarterly groun{ water monitoring report the
Permittee shall fully and completely disclose all non-confornance with requirements
of the currently approved QAP, mandated by Part I'E'1(a)
0 Electronic Data Files and Format - in addition to written results required for every
samplingreport,thePermitteeshallprovideanelectroniccopyofalllaboratory
results for grounJwater quality moniioring conducted. Said electronic files shall
consist of Comma Separated Values (CSV) format, or as otherwise approved by the
Executive Secretary.
2. Routine DMT Performance Standard Monitoring Report - the ?ermlttee shall provide
quarterly monitoring i"ports of all DMTperformance standard monitoring required by
partl.E3 of this permii. DMT monitoring shall be conducted in compliance with this.
oermit and the currently approved DMTlr4onitoring Plan. Said monitoring reports and
results shall be submitted for Executive Secretary approval on the schedule provided in
Table 6, above.
3. Routine Cell 4A BAT performance Standard Monitoring Reports - the Permittee shall
provide quarterly monitoring reports of all BAT performance staldTg monitoring
required by Part I8.8 of this-Permit. BAT Monitoring cell4A shall be conducted in
compliancl with a plan approved by the Executive Secretary pursuant to Part I.H.19.
Said monitoring report ani results ittutt t" submitted for Executive Secretary approval on
the schedule provided in Table 6 above. At a minimum, reporting of BAT monitoring for
Cell4A will include:
a) LDS Monitoring - including:
1) Report on the operational status of the LDS pumping and monitoring equipment
during ttre quaier, including identification ofany intervals ofnon*operational
status and rePairs.
2) Measurement of the weekly fluid head at the lowest point of the secondary
membrane
3) Measurement of the volume of all fluids pumped from the LDS'
b) Measurement of the weekly wastewater fluids elevation in the cell 4A to determine
freeboard
23
State of Utah
DePartment of
Environmental QualitY
Richard W. SPrott
Executive Director
Division of Radiation Control
Dane L. Finerfrock
Director
,o* *]rsMAN, rR
Govemor
GARY HERBERT
Lieutenant Governor
April 10,2008
168 North 1950 west. PO Box 144850'Salt Lake city, uT 84t l4-4850'phone [phone] 'fax [phone]On
T.D.D. (801 ) 516-Ml4' www'deq'utah'gov
CERTIFIED MAIL
(R"t.r.n ReceiPt Requested)
Mr. Steven D' Landau
Manager, Environmental Affairs
Denison Mines (USA) CorP'
1050 Seventeenth Street, Suite 950
Denver, CO 80265
Dear Mr. Landau:
SUBJECT: 2007 Fourth Quarter Discharge Minimization Technorogy (DMT) performance standard
f,fonito-ting nipo't for the Wtrite Mesa Uranium Mill'
Cell|ZslimesDrainMonitoring:Confirmatorya,"tionLetterwithCommentsand
Recommendations
WereceivedthesubjectfourthquarterreportonFebruary23,2008.Asyouwillrecall'effectiveMarch
l7 ,z.Og,part I.F.2 li rt " crouna wut.. pischarge Permit ."quit"t ttris ieport be submitted for Executive
Secretary approval' fto*"'"'' at this time the '"po't need not be approved'
Comments:
We have reviewed the subject report' and have the following comments:
A).Fromthereportedstatic.waterlevelsonthesubject,weobservethatthereisageneraltrendforthe
warer level to be rising in this .li;; druin a'ring 2007' We determinedthe average distance to
water level reported for the V"u. iOOZl. be ll-26 feet below the access pipe measuring point'
corresponding to a depth in -eiq"i;a;n uUoul the slirnes drain bottom of 26'7 | feet (38'00 -
ll.2g). This-elevati on of.26.7lt* *il be used ^t th" t0Oiuu"tug" elevation value in equation l'
found in part I.D.3 of the current ground water discha.g" p"..i, fhis ualu" will be incorporated
into the permit at the next modification'
B). We observed that on four (4) inconsecutive months (July, August, october, and November) of
2007 the cell2 slimes drain pu-p *u, round ro be not of"ruting when the monthly inspectors
arrived. No information was provided in the report ,"gu.aing tlming of pump repairs or the
duration of PumP breakdowns'
As required by the Part I.D.3.b.l of the permit, "the Permittee shall at all times maintain the averagewastewater head in the slimes drain access pipe to be as low as reasonably achievable in each tailingsdisposal cell' in accordance with a DMT M;;itoring Plan. compliance sirall be u.t i"r"o when the averageannual wastewater recovery elevation in the slimes drain access pipe, determined pursuant to the currentlyapproved DMT Monitoring Plan, meets the.conditions in Equatio, I . . .,, w" u.t ro*ledge thatcompliance in this matter cannot be determined until after submittalof ihe 4.r, ar;;;;, 200g DMTMonitoring Report.
Recommendation:
In light of the above findings DUSA may need to make changes to the DMT Monitoring plan and makeother efforts to ensure future compliance with the requi.emen"t for declining annual average head in theCell2 slimes drain.
Confirmatory Action:
However, the elevations of the slimes drain need to be expressed in terms of elevation above mean sealevel' Therefore' the elevation of the water level measu.ing point on the slimes drain access pipe needs tobe surveyed to establish its elevation. This elevation shall6e certified in writing by a utah RegisteredLand Surveyor or kofessional Engineer. In a conversation with you and Mr. David Rupp of this office onApril 4, 2008 yotr agreed to supply the above survey information in writing to DRC by the next quarterlyDMT Perfonnance Standard Monitoring Report due June l, 200g.
If you disagree with the above commitment and compliance schedule, please respond in writing withinthree (3) working days of receipt of this letter.
UTAH RADIATION CONTROL BOARD,
Mr. Steven D l.andau
April 10,2008
Page2
LBM:DAR:dr
F:\drupp\DUSA\GWDhelated docs\DMT\ 2007 4th etr 03-08 cmtltr.dtr
Dane Finerfidck
Executive Secretary
roN M. f*o,,, r*.
GARY HERBERT
Lieutenant Governor
State of Utah
DePartment of
Environmental QualitY
Richard W. SPrott
Executive Director
DTVISION OF RADIATION
CONTROL
Dane L' Finerfrock
Diret:tor
TO:
FROM:
DATE:
File, DUSA Ground Water #1374
MEMORANDUM
4rrt
Dave Rupp, Environmen gt enginee' fu,
April4,2008
168 North 1950 west. po Box 144850. satt take city, UT 84114-4850. phone (801) 536'4250 'fax [phone]'l
T.D D. [phone] 'www'deq utah'got'
suBJECT: Engineering Module 75A,2007 Fourth Quarter Discharge Minimization Technology
@MT) p;;orrnance Standard Monitoring Report for the White Mesa Uranium Mill dated
Feb. 26,2008. Confirmatory Action Letter with Comments dated April 4,2008;
Critique on Cell 2 Slimes Drain Dewatering
Attached is a two-page spread sheet I created titled, DUSA Cell2 Slimes Drain Recovery Testing updated
3-6-0g. On it there is a graph of the static or approximately static water levels of the slimes drain recovery
testing since it began foiC"ff 2. Observe that ihe static water level shows a general trend to be rising in
this slimes drain.
The permit in effect at the time of this and earlier reports does not require approval of the reports'
However, future reports will require approval per the current permit of lf-ti' 17 ,2008' The 4h Quarter
2007 report i, ,ot upfrorubl", in that the slimes drain head in2OO7 shows a steady increasing trend (see
attached chart). Con'sequently, if this trend continues this should be so stated in DRC comment letters on
quarterly reports. R"p"tt fu;oval can only be attained by lowering the average annual head in the slimes
drain as per part I.F.1'1 of tire permit. Thai cannot be determined until the first quarterly report in March
2009.
The overriding goal on this subject is the performanct standard of lowering of the average annual
head. This performance goal for DusA must not be lost in pointing out specificaroblem issues' such
as doing things to get U"ti"r pumping efficiency. There are many avenues for DUSA to attain the
overriding goal. We need not^giv"it"* specific guidance, or er/en emphasize improvement items in
inspections, which could form-an excuse fo. non-Io*pliance, should DUSA only comply with specific
directives, and not take responsibility for reducing the head in the slimes drain'
The following is a summary of some DRC pump efficiency related observations:
1). on four (4) inconsecutive months (July, August, october and November), the pump was found to
be not op"ratirg when the DUSA ,rronihly inspectors arrived. only attending to the pump site
once per month seems problematic , and ioulileave monthJong gaps in pump operation' DUSA
inspectors shouldundeistand there is a recharge period between active operating times, and still
I\,Iemo on Module 75A
March 27,2008
Page2
verify the pump is routinely turning on as required. They should be aware of monthly slimes drainlevel measurement. They should note whe,n ih" pu-p is turned off for monthly water levelrecovery measurements. For other times if they find the pump is not operating, they shoulddocument it, and report to management. Documentation;f timely repair of a malfunctioning pumpcouldbe an inspection item. E.g. per the provisions of Part rv.g iouty to provide Information) ofthe ground water discharge permit, *" "ould get partial documentation by obtaining the WeeklyTailings Inspection Forms for the period of June 1, z0ol through Decem|er 31,2007.
2)' The back page of the spread sheet shows more specific comments on the monthly readings. Thesewere made by me, and the comments in italics by the DUSA inspectors, which measure themonthly slimes drain water levels.
3)' The allowed time in the DMT Monitoring Plan for restoring pump operation is l5-days afterfinding it not operating properly. Fifteendays to obtain purt. ura ao repairs seems reasonable.However, multiple fifteen day repair periods separated orty uy .t ort p"riJ, of operation seemunreasonable' There could be possible scenarios when a r6*iy repaired pump might run for a fewhours or days, then stop again. such-could result in long periods or ao*, tlme. unoer the existingplan, in the worst case, operating with a chronically inaJtive pump system probt"* could continuenearly indefinitely, as long as there is continual decrease in the average annual slimes drain waterlevel (Permit I'D.3). However, as the permit requires continued decrJase in the annual averageIevel, eventually efforts beyond using only the current pumping setup to lower the level willprobably be needed.
4)' DUSA may have had a short stint of bad.luck with this pump system, or it simply should beupgraded before future breakdowns continue to occur (tit<e an ota cary. To remedy or avoidchronic improper pump operation, itseems the DMT plan may need to be adjusted. (To eliminatechronic breakdowns, and eventually keep the water level lowering the.o*piry may elect toreplace the entire pump system with new, unused equipment desilned for tile particularapplication, as endorsed by the manufacturer). other means are available to improve pumpingefficiency, including but not limited to changes in the following:(a)' Pump control systems, i.e. replace the current clock timer with a water level basedcontroller.(b)' Pump size or capacity, i.e. use a smaller pump that runs for more hours per year, etc.
we could strain at the issue of chronic improper operation, but eventually the company will have to cometo grips with the reality, that they must makel-p.Lr"-"nts to attain the bMT .tunau.o of lowering thewater levels annually. However, we should encourage DUSA to make improvements, but reminding themof the end goal of meetils the annual average water level reduction requirement, as defined in the currentpermit dated March 17,2008.
Attachment: DUSA cell2 slimes Drain Recovery Testing two-page spread sheet.
F:\drupp\DUSA\GWDhelated docs\DMTMerro on 2007 4rh euarter Rpt 03-08.doc
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State of Utah
DePartment of
Environmental QualitY
Richard W' SPrott
Executive Director
DTVISION OFRADIATION
CONTROL
Dane L. Finerfrock
Director
TO:
FROM:
DATE:
roN M. r|,*o*' r*.
Govemor
GARY HERBERT
Lieutenant Governor
File, DUSA Ground Water #137 A
MEMORANDUM
(un
Dave RuPP, Environmen tut U"f'"""ffi
October 1,2008
l68Northl950West.PoBoxl44850.Saltl,akeCity,UT84ll4.4850.phone[phone].fax[phone]
T.D.D [phone]' www'deq'utdh'8ov
SUBJECT:EngineeringModuleT5A,2008FirstandSecondQuarterDischargeMinimization
Technology (DMT) pe.ro.munc" stunauto Monitoiing Report for the white Mesa
UraniumMill dated May 2i,2008 and August 2g,2oo8 Respectively'
This letter is provided as supplementary information to our letter to DUSA on the same subject, dated
october 1, 200g. Attached is a two-pag" ,p'r;;!":t I created titled, DUSA Cer 2 slimes Drain Recovery
Testing,updated q-:o-08. on it there it ";6h of the static.or approximately static water levels of the
slimes drain recovery testing since it u"guri ro" c"ll 2. For tne nrsi half of this carendar year, we note there
appears to be a trend for the wastewat", ,";;;;; ;vel to be de"tining since the fourth quarter of 2007 '
However, up to the 2oo'7 4hQuarter DMT report showed an increasing trend (see chart)' DRC Report
approval can only ue aitainea-uy lowering it J ur".ug" annual t "uJ
in ihe slimes drain as per part I.F' 11 of
the permit. Ttrat cannot be determin"a ontii-it. fouitr quarterly report for 2008' which will be due in
March 2009. The p"rrriii" "ff"ct at the tir"" "f it " subject and earlier reports does not require report
approval'
- ---:^^rr-. r^^^rz sA\GwDPRelated
Thebackpageoftheattachedspreadsheet(electronically-locatedatFtdrupp\wp\DU]
Docs\ DMT Docs\ ,ii*", Jruinin ceil2.xls), shows specific comments on ittl monthly readings' These
were made by me, urJ,t o." in italics by the DUSA inspectors' which measure the monthly levels'
The overriding goal on this subject is the performTc: standard of lowering of the average annual
head. This performance goal for DUSA riust not be lost by pointing out specific problems' An
earlier memo regarding these report, aat"a npril 4, 200g rists iome .p".ifi" observations, which need not
be emphasized. uo*e-ver, we cluld "r.oJ*i" utjSn ,o *t";'l*piovements"'but reminding them of the
endgoalofmeetingtheannualaveragewaterlevelreductionrequirement'
Attachment:Dt]sACell2SlimesDrainRecoveryTestingtwo.pagespreadsheet.
F:\drupp\DUSA\GwDPrelated docs\DMT\tvlemo on 2007 4th Quarter Rpt 03-08 doc
File: DUSA Ground Water #137A
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oDepartment of
Environmental euality
William J. Sinclair
Acting Executive Diret:tor
DryISION OF RADIATION CONTROL
Dane L. Finerfrock
Director
State of Utah
JON M. HUNTSMAN, JR
Governor
GARY HERBERT
Lieutenant Governor
n
December 77,2008
CERTIFIED MAIL
(Return Receipt Requested)
Mr. Steven D. Landau
Manager, Environmental Affairs
Denison Mines (USA) Corp. (DUSA)
1050 Seventeenth Street, Suite 950
Denver, CO 80265
Dear Mr. Landau:
SLIBIECT: December 1, Z00g White Mesa Mill Discharge Minimization Technology @Mf)performance standard Monitoring Report,3?, a;;.;, l,"ioi.'z*2 Srimes DrainMonitoring: comments, Requesi ror Aaaitional Information andConfirmatory Action Letter
we received the subjeclfgulh ouarter report on December 1, 200g. As you will recall, effectiveMarch 77 ' 2008'Partr'F'2 of the Groundwut.r nir.h*g. permit (permit) requires this report besubmitted for Executive Secretary approvat. we have reiriewed this report, and have thefollowing comments, request forlnftrmation, and confirmatory action agreed upon by DUSA:
2.
w
No pump breakdowns were noted during the reporting period.
This quarter the water level rose inrespectively. However, the overall
down.
bothAugust and Seprember by 0.1g_foot and 0.25_foortrend from the previous quarters of 200g appears to be
Request for Information:
Each month in the second and this third quarter reporting periods of 200g, for cell2monthly slimes drain monitoring, a 104-hour-.".or".fii"rri" was used as the final readingreported. Readings were taken beginning at 0700 hours th" 1;l;;;;;;r, endingat 1500 hours the fifth day, for a total orlo+-trou.r. rro*"uer, the last three readings arenot stabilized as required by the DMT pran (paragrupnl.r.o
"i), but instead the warerIevels continued to increase at a rate of rougiiry olozreet p", t or..
1 68 North I 950 West . Salt t ake City, UTMailing Address: p.O. Box 144850 . Satt Lake City, ijf a+t t+_+SSOrelephone (80r ) s36-4250 . Fax (801 _533_4osi: i.ii.o] iror ) s:o-+oro
n ww.deq.utoh.gov
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roN M. flrro*, r*
Governor
GARY HERBERT
Lieutenant Governor
State of Utah
Department of
Environmental Quality
Richard W. Sprott
Executive Director
Division of Radiation Control
Dane L. Finerfrock
Director
::,1!!
)
November 19,2008
Mr. Steven D. Landau
Manager, Environmental Affairs
Denison Mines (USA) Corp. (DUSA)
1050 Seventeenth Street, Suite 950
Denver, CO 80265
Dear Mr. Landau:
SUBJECT: November 5, 2008 DUSA Letter Submission of Revised DMT performance StandardMonitoring Reports for the First and Second euarters, 200g; October 1, 200g DRC Letter,comments and Request for corrections; Approval of Reports
We received revised copies the subject first and second quarter 2008 DMT performance StandardMonitoring Reports as requested by our subject letter of bctober 1, 2008 and conveyed by the subject letterdated November 5, 2008. We have reviewed the corrected reports, and found that all issues raised in theDRC October 1, 2008 Request for Information letter have been adequately resolved. Therefore, the revisedquarterly reports are hereby approved.
As you are aware as required by the Part I.D.3.b.1 of the permit, "the permittee shall at all times maintainthe average wastewater head in the slimes drain access pipe to be as low as reasonably achievable in eachtailings disposal cell, in accordance with a DMT Monitoring Plan. Compliance shall te achieved when theaverage annual wastewater recovery elevation in the slimes drain u".e., pip", determined pursuant to thecurrently approved DMT Monitoring Plan, meets the conditions in Equaiio, t . . .,' We note that pursuantto Part I'D'3(b) that Cell 2 compliance in this matter cannot be determined until after submittar orirre +dQuarter, 2008 DMT Monitoring Reporr.
UTAH RADIATION CONTROL BOARD
DAR:dr
F:\drupp\DUSA\GWDPrelated dms\DMT\ 200g lst & 2nd err Reports Approval.doc
File: DMT l/4ty Moniroring Reporrs l37A
168 North 1950 west'PO Box 144850. Salt Lake city, ur 84t l4-4850. phone [phone]A. fax [phone]
T.D.D. [phone] . www.tleq.utalt.gov
ck, Executive Secretary
State of Utah
Department of
Environmental euality
Richard W. Sprotr
Executive Director
Division of Radiation Control
Dane L. Finerfrock
Director
roN M t}r#o*, r*
CARY HERBERT
Lieulenant Governor
October 1,2008
,:' "',,\ i./ r\;r'..-'
l-F-" tt\5 o&
CERTIFIED MAIL
(Return Receipt Requested)
Mr. Steven D. Landau
Manager, Environmental Affairs
Denison Mines (USA) Corp.
1050 Seventeenth Street, Suite 950Denver, CO 80265
Dear Mr. Landau:
SITBJECT: 2008.First and second Quartgr Discharge Minimization Technology (DMT) performanceStandard Monitoring Report for the Wh"ite rvr..u u.unium Mill injra'irgcell2 Slimes Drain Monitoring: cr--u"ir u"d Request for corrections
we received rhe subject first and Scond quT:. prrl"^p"ls on May 30, and September 2,200grespectively. As you are aware, effective March t7, ZC/|,ri,pr.tl.f.Z of th" G.orri *ui", Discharge permitrequires these reports be submitted for Executive s"o"d;;;pr"rur. we have ,"ui"*"0 the subjectreports, and have the following comments:
l. Surface Water Elevation Related Errorsa' Regarding Cell 1, on the second page, the third column of Table 6, it lists the maximumwastewater elevation, under license-condition, as 56l4.4fmsl. Howlr"r, on the previouspage' paragraph (i) states the lalimgm liquid elevation for cell 1, under the license, is5615'4 fmsl' This error is on both rrbj";t;;;;1. pr"u." explain and resorve thisdiscrepancy.b' In the paragraph numbered 4.0-of the subject second quarter report, it shows the maximumwater level of the Roberts Pond to be 5,6i4.02 fmsl. whereas, section LD.3.e of thecurrent permit states that, "lJnder ro "ii.u-.tunc"s ,nrrr the water Ievei in the pondexceed an elevation of 5'624 feet amsl." Heuse "xpruin and resolve this discrepancy.
2. ObservationsRegarding Cell Zslimes Drain Monitoringa. Trends in the Wastewater ppcn'an, Et^.,^a:^- :--
recovery level to be declining since the fourth quurt". of2O0i.
168 North r950 west'po Box I44850. sarr Lake ciry, ur 841 l4-4850. phone (801) 53 6_4250.fax [phone]T.D.D. (B0l ) 5364414 . www.deq.utah.gov
Mr. Steven D. Landau
October 1,2008
Page2
s ln tng Jlrflrtrb r-'r4ru ru'""" ^ '
in JanuarY and
February,atllandd;;;**F"'::",T:::::l3 l*.:l*llll;T,lT'Y*f,i1",",reDruary' af, /1 4uu 1" ^ ::-,^:-.i-^^^ r-.,.r lbilize during tests, evenil;gh'i; 2008, the recovery head level did not completely sti
those exceeding the ;;il; iest period of qg-houtt' thu'' u longer recovery period was
,rla Uv DUSAIo approximate stabilized elevations'
c.PumpReliabitity.Itapp-earsthatduringthesubjectsixmonthreportingperiodthecell2
,ur,,; orffir-p *", f;;J;;;Hi"*l ivhen the monthlv inspectors arrived'
As required by the Pafi I.D.3.b.1 of the permit, ..the Permittee shall at all times maintain the average
wastewater head in the slimes d.uin u"""J. pipl ," be as low^as reasonabry achievable in each tailings
disposal cell, in *";;;;;*itt u pUf fr,i.riiioring Plan' Compliance slail be achieved when the average
annual wastewater recovery elevation in ihe slimes-alrain u""".ffi", q:ry""d,pursuant to the currently
approved DMT Monitoring Plan, meets the conditions in Equation l " '" 'we acknowledge that
compliance in this'r.* iurrootU" a"t"Jir"a o"tif after submittal of the 4e Quarter' 2008 DMT
Monitoring RePort'
Regarding the errors noted.in pTugrT,h one above' please explain in writing' correct and resubmit the
subject reports ro ,t " Diririon In a teleptrone conversation on october 1' 2-008' you committed that DUSA
woutd trtty ,".pora-to,ti, i.ru" 30-d"y: ffi;;;;"'pt;i;hisleuer' If you have questions on the above'
please contact me'
SincerelY,L*'2aX.*v/k7 David A- RuPP, P'E' \
Geotechnical Services Section
LBM:DAR:dr
F:\drupprDUSA\GwDPretated docs\DMn 2008 lst & 2nd Qtr 10-08 cmtltr'doc
File: DMT 1/4ly Monitoring Reports 1374
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Govemor
GARY HERBERT
Lieutenant Governor
State of Utah
Department of
Environmental QualitY
Richard W. SPrott
Executive Director
Division of Radiation Conuol
Dane L. Finerfrock
Director February 7,2008
CERTIFIED MAIL
(Return ReceiPt Requested)
Mr. Steven D. Landau
Manager of Environmental Affairs
Denison Mines (USA) CorP.
1050 17th Street, Suite 950
Denver, CO 80265
Dear Mr. Landau:
SIIBIECT : 2OO7 First, Second and Third Quarter Discharge Minimization Technology (DMT)
performance Standard Monitoring Reports for the White Mesa Uranium Mill.
Notice of Enforcement Discretion: Quarterly Reporting of Cell 2 Monthly
Slimes Drain Recovery Test Results and Readings
on June lI,2OO7 , September 5,2007 , and December 10, 2007 we received the respective reports
on the subject referenied above. We note these reports do not contain submissions of the
monthly tii-.t drain recovery test monitoring for Cell 2'
Per our letter of January 24,2007 , we requested the DMT Monitoring plan include "effective
immediately, the monthly slimes drain head recovery test results and readings for Cell 2 are to be
reported wiih the quarteriy reports per Part \.F.2 of the permit." In a response letter dated March
ti,zool Denison Minet iuse) Corp. (DUSA) stated, "The monthly slimes drain head recovery
test results and readings for Cell 2 will be reported commencing with the first quarter 2007 report
(which will include mlnthly data for March 2OO7)." The first quarter 2007 report, including the
slimes drain recovery test results and readings per DUSA's intention above, was to be submitted
by June 1,2007 , (per Part I.F.2 and Table 5 of the permit)'
The white Mesa Mill Tailings Management system and Discharge Minimization Technology
(DMT) Monitoring Plan datedMarch 2007, and approved by DRC on May 9, 2OO7 ' Pursuant to
part I.F.2 of the permit, the monthly recovery test results and readings for June 2007 were to be
reported in the second quarter report by September l, 2007 '
168 North 1950 West. p0 Box 144850. Salt lake City, UT 841 l4-4850'phone [phone] 'fax [phone]
T.D.D. (801 ) 536441 4' www.de q.utah. gov
Mr. Steven Landau
February 7,2008
Page2
After verbal request from DRC staff, a significant amount of readings were provided (not in a
quarterly report) via email from Mr. David Turk of DUSA on October 31,2007 , for I I tests
beginning November 16,2006 through September 18,2007.
The third quarter report was received on December 5,2007. Again, it failed to provide the
required slimes drain recovery test results and readings for Cell 2.
After review of this non-compliance with Part I.F.2 of the permit, the Executive Secretary has
determined to use enforcement discretion for the second and third quarters of 2007. Please be
advised that failure to meet the reporting requirements for the fourth quarter of 2007 report, due
March 1, 2008, may result in escalated enforcement action.
Also, we remind you that "an annual summary and graph for each calendar year of these
measurements must be included in the fourth quarter report. After the first year, and beginning in
2008, quarterly reports shall include both the current year monthly values and a graphic
comparison to the previous yaff," (Section 8.2,White Mesa Uranium Mill TMS and DMT
M onit orin g Plan dated 3 107).
Please contact Mr. David Rupp of DRC at 801-536-4023, if you have any questions on the above.
Sincerely,
UTAH WATER QUALITY BOARD
Co-Executi ve Secretary
DLF:dr
F:\drupp\DUSA\GWDPrelated docs\DMT\lst-3rd QtrlyRpt Review l-08
loN r'a. JrsveN, ln
GARY HERBERT
Lieutenant Governor
State of Utah
Department of
Environmental QualitY
Richard W. SPrott
Executive Director
DIVISION OFRADIATION
CONTROL
Dane L. Finerfrock
Director
MEMORANDUM
TO:
FROM:
DATE:
File, DUSA Ground Water #131h
Dave Rupp, Environmental Engine - @---1 [h4
February 7,2008
SUBJECT z 2007 First, Second and Third Quarter Discharge Minimization Technology (DMT)
performance Standard Monitoing Reports forthe white Mesa Uranium Mill.
Notice of Enforcement Discretion: Quarterly Reportilq of Cell2 Omission of
MonthlySlimesDrainRecoveryTestResultsandReadings
A letter, subject as above dated February i ,z0og discusses the details of omission of all of the
slimes drain test results and readings from the first three quarterly reports of !o!l ' Attached to
this memo is the "-rit data suppli"o uv DusA via an email on october 3l'2007 '
Also attached is a spread sheet titled DUSA Ceil 2 Slimes Drain Recovery Testing. Included on
this spread sheet is a graph of the end point of the static or approximately static water levels of the
slimes drain recovery testing for Cell2'
Note that the recovered slimes drain surface graph shows an overall increasing pattern at this time'
The difference of barometric pressure from the mill to the tailings cell should not be significant'
Also, at most, only one reading of barometric pressure was recorded per day on the submitted
data.
The DUSA DMT monitoring plan requires the recovery test to be at least g0 hours. This was not
always followed, if the watei ievel was found to be static for a period of time'
Attachments:1. Submitted data by DUSA (Oct' 31' 2007)'
2.DU,ACetl2SlimesDrainRecoveryTestingspreadsheet.
F:\drupp\DUSA\GWDPrelated docs\DMTWIemo on 2007 lst-3rd Quarter Rpts 02-08
168North1950West.PoBox144850.Saltl,akeCity'UT841t4.4850.phone[phone].fax[phone]
T.D.D. [phone]' www'deq utah'gov
MONTHLY HEAD MEASUREMENT TEST
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9,19
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Slimee CeIl # 2
Date
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Location#
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Pagel5oftT
ATTACHIIIEM I
FTELD DATA WORKSHEET FOR GROUND WATER
I
Locarion (werr namersl;^. C.l ),.t #.ti,[lfi'.,",
pH Buffer 7.0 pH Buffer4.0
Spec i fi c Conductance____uMHOS/cm Well Depth__--
Depth to Water Casing Volume (V) 1, Well:_J.653h)
pH of Water (avg)
3" Well: _(.367h)
Well Water Temperature (avg)__
Timc:Time:
Conductance Conductance
oFI.
Temperature_
%
Time:Time:
ConductanceConductance
oH.
Temperaturc_
Pumping Rqte ealculation
FIow Rate (e), in gprn.
5/60 = =
Temperature_
-
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If a preservative is used,
Specify TYPc and
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bttrer (specifY)YN
gr,tg Sl,,*.sfetl A^^*
Dxrc:.t.:9.0Sful ill - Crcundwatcr Di.sr:hruge pcrrlit
Croundtv iltcr lvlonitoring proccrJurc
Well Water Ternperature (avg)_
Rcvi.sion: I
Pagel5oflT
ATT.TcHIITENTJ
FIELD DATA }ryORKSHEET FOR GROUND WATER
I
Locarion (werr name) sl,^e G // e ffiti#fii,",,
pH Buffer 7.0 pH Buffer 4.0
Spec i fi c Conductance_uM HOS/cm Well Depth_%
Depth to Water Casing Volume (V) 4, Well:.- _(.653h)3,'w"ll: I-l( s67h)pH of Warer (avg)_ - I
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nH.
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%
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%
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Time to evacuate two casing volumes (2V)f=ZYIQ=--
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Page l5oft7
ArT.rqErlrENfl
FIELD DATA WORKSHEET T'OR GROUND WATER
Dqlr-./Sampler
Name and initiClw.\"s
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(r)
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-
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Time:
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pH
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-
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ArT.rqHfrENf!
FTELD DATA WORKSHEET F'OR GROUI{D WATER
pH Buffer 7,0
Specific Conductance
Dcpth to Warer
Well Water Temperature (avg)_=.=-
Time:
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Time:
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Feservative .tddedFiltered
(circle)Samole Volur.ne
(indtcate if oEeEffils qn cifiea
If a preservative is used'
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ATr..rcH, [rEtgfl
FIELD DATA WORKSHEET F'OR GROUAID WATER
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White Mesa Uranium Mill
DMT Performance Standard Monitoring Report
State of Utah
Groundwater: Discharge permit No. UGW3 7 O0O4
lst euarter
January tluough March
2009
Prepared By:
Denison Mines (USA) Corp.
1050 171h Street, Suite 95d
Denver, CO. 80265
!
0/,5{nW
sq
June 1,2009
Dl(I' PERFORMATICE STANDARD MOMTORING REPORT
L.0 Measurements Taken During the Quarter
During the Quarter, the following DMT Monitoring was performed or addressed, as
required under Part I.8.6 of the Permit:
-Weekly tailings wastewater pool elevations for tailings Cells l, 3 and 4,{;
-Monttrly 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 wastewatef in Tailings
Cells 1, 3 and 44 to ensure compliance with the maximum wastewater elevation criteria
mandated by Conclition 10.3 of the Mill's Radioactive Materials License. These
measurements were made from an elevation suryey. The results of such monitoring,
reportecl as feet above meall sea level (fmsl), are included in Attachment A.
Condition 10.3 of the Miil's Radioactive Materials License provides that freeboard limits
for Cells 1 and 3 shali be set in accordance with procedures that have been approved by
the U.S. Nuclear Regulatory Commission. Under those procedures:
(i) The fi'eeboard limits are set as per the Jauuary 10, 1990 Drainage Report for Cell
I 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 fmsi. However, in UDEQ couespondence 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 Cell4A 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 ("FMr.-'). The top of the FML in Cell I 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 Celts I 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
Maximum
Wastewater Elevation
Measured During the
Quarter (fmsl)
Maximum
Wastewater Elevation
Permitted Under
License Condition
10.3 (fmsl)
Maximum
Wastewater
Elevation Permitted
Under Part I.D.2 of
the Permit (fmsl)
Cell I
Cell3
Cell4A
5,673.4
5,603.05
5,588.4
56r 5.4
5,602.51
5593.741
5,615.5
5,605.5
5593.741
N.o-tS Interim maximum elevations of 5,602.5 fmsl and 5,593.74 fmsl for Cells 3 and
4A, respectively have been established in correspondence from UDEQ dated November
20,2008. The rniximum elevation of 5,593.74 fmsl for Cell 44' has been set assuming
that the total PMP volume for Cells 2,3 and.4A will be accomodated in Cell 4,A. 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 elirninate
the need to set a freeeboard limit for Cell 3, given that the freeboard limit of 5,593.74
frnsl for Cell 4.A' 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 Discharge Permit and correspondence fi'om the
UDEQ dated February'7,2008, the results of monthly recovery monitoring of the slimes
drain for Cell? 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 rJading for each month are included as
Attachment B. These readings are to be collected during a 90 hour recovery period after
the slimes drain pump has been tumed off in order to determine the static water level in
the drain (head) after this short cessation ia pumping.
In Part 1.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 corrmsnced, no such measurements will be made in the
slimes drain access pipe for Cell 3 in the foreseeable future.
,1.0 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 Rober"ts Pond to determine
compliance with the DMT operations standards in Part I.D.3. of the Permit. Parr I.D.3 of
the Permit provides that the water levei in Robert's Pond shall not exceed an elevation of
I 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,(24 fmsl.
5.0 Weekly Feedstock Storage Area Inspeetion
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 fi'om this rcquirement or leaking
alternate feedstock drums or other altemate feedstock containers were observed during
the inspections.
6.0 Signature and Certification
This document was prepared by Denison Mines (USA) Corp.on November28,2008.
DENTSON MrNES (USA) CORP.
By:
David
Vice
Certification:
I certify, under penalty of law, that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather 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 information 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
imprisonmentfor knowing violations.
nlund
Vice President, Regulatory Affairs and Counsel
Denison Mines (USA) Corp.
Regulatory Affairs and Counsel
Locatlon
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DENISOND#.@
Deniron timt {U8A) Corp.
1050 ,7th St!..t, Suite 950
Donvor, CO 802C5
USA
Tel :[phone]?98
Fax : 303 3E9"tt25
www.d.nilonmlm.eorrr
fi/UNES
May 19,2009
Mr. Dane Finerfrock, Executive Secretary
Utah Radiation Control Board
Utah Department of Environmental euality168 North 1950 West
P.O. Box 144810
Salt Lake City, UT 84114-4810
Dear Mr. Finerfrock:
Re: White Mesa Mill Cell No. I Liner RepairGWDP UGW37004- part I.G.3.(a) Notification
In accordance with the provisions of Dexison's procedur e, Liner Maintenance provisions-cells
l '2'3 and Roberts Pond dated october 5, 2008, and Part I.G.3.(a) of the Grouncl water DischargePetmit, the following information is provided as a written follow-up to our orJ notification thatwas given to UDEQ's Emergency Reporting staffon May 1 5,2oog.
on May 14,2009 at approximately 4:00 PM the Mill initiate-d work ro repair a plugged tailingsline on the dyke near the Northeast comer of cell l. The tailings pipe connection flange wasdisassembled to allow flushing of the line, which unfortunately-reieased u rignifi"unt outflow oftailings solution and sand that eroded the soil cover over the liner exposing u"fu.t of the liner.The exposed liner was observed' to be damaged wfrich appears to have beeir caosed by the forceof the outflow, which also eroded some of tf,e underlying *itr. rni, occurred at the lip edge ofthe dyke near the anchor trench well above the solution i-evel. Because of the saturated soil inthe area of the damage, it will be several days before we can assess the extent of the damage andmake the required repairs.
Repair work will involve the installation of a PVC repair patch over the damaged pVC liner,above the solution level in the pond. subsequent to tire;"pr. installation, the"glueo seams willneed to be tested by means of a vacuum box in order to urru.. that all seams are intact and thatno leakage will occur. once that test is completed, the area will be recovered with earthenmaterial in order to preclude damage of the ivc fro* sunlight. In accordance with Denison,sprocedure, Liner Maintenance Provisions-cells 1,2,3 anct RZbrru poncl d,atedoctober 6, 200g,Denison will issue a repair report once the work is completed, including the informationspecified in the procedure.
If you should require additional information about this matter please contact me'
Yours verY trulY,
:! "4,,fupi4.4-'
, :'i)uxIsoN Mlxps (USA) CoRP.
Srevpx D. L,troau
M.n n n crn, ENvtnoNMENTAL Arrarns
"r*rro*sd#frfitNr$
Incident Number: 7405 NRQnort +'
INCIDENT SUMMARY
Caller reported that a tailing line was plugged, a blowout occurred, and a pond liner snagged causing a tear. Repairs weremade' No leak or discharge occurredbeifuse the tear occurred above the tailing solution level.
Chemical (s) Released:
SPIL LOCATION
Incident Location: White Mesa Uranium Mill, cell one, NE cornerNearest City: BlandingCounty: San Juan
Highway:
Milemarker: 0
ln Waterway :
REPORTING PARTY, DATE, TIMEName: David TurkCompany: Denison MinesPhone: (435) 678-Z22t,ext. tt3
Date Reporred: 5ll5/20o9 Time ll:45Incident Began: 5/14/20A9 Time: 16:30Incident Ended: Time:
RESPONSIBLE PARTYName: Denison Mines Corp.Address: 6425 S. Highway t9l, Blanding, UtahPhone: (435) 6jT-21t6
NOTIFICATIONS MADE
Active Agency may be one actively engaged to coordinate and mitigate a releaseAgency: Radiation ControlActive?: NO
Contact Type: LIVEContact: John HultquistTelephone: (BO1) 536_4263
Date / Time: 5/lg/2o}g g:40By, KV
Agency: DEeActive?: yES
Contact Type: LIVEContact: Dave AriottiTelephone: ./,35) 637_3671
Date / Time: slt}t2}Og 8:48By' KV
REPORT RECEIVED BY
Received by;Viehweg, Kim
ltmavd LtiF
rilt. o, seai
fifdir<9
Tailings cells 1, 2, and 3 are the subject of comprehensive daily inspections which areconducted by either the Environmentil Technician or the Radiation Technician, as wellas once per shift Daily operations Inspections which are conducted by tf,e vtitt s6ttForeman or other trained personnel designated by the Shift poreman. The details of thesedaily inspections are outlined in Sections 2.1 and 2.2 ;t the white Mesa vtitt ruiting,Management system and Discharge Minimization Technology (DMT) Monitoring plan.In each case, these inspections arJ recorded on inspecuo, rots fooiy i^i)ction DataForm and operating Foreman's Daily Inspectictn i**, r"rpectively). In addition, non-recorded Daily operations Patrols ur.
"or-du"ted twice per shift by operations personnel.with regard to Roberts Pond, this facility is observJJ'on a weekly basis when theEnvironmental or Radiation Technician visiis the facility for the recording "i*"* levelsat that location.
Trainins
Ail individuals performing inspections described in Sections 2.7 and 2.2 of the DMTMonitoring Plan must !uI" iailings Management system Training as described inAppendix c to the DMT Monitoring Ftun guilingr tnrp""iion Training"). e, *o elementof the "operational s-v-st9ms" inspJction, in.p".io., ,, trained and required to observethe conditions of the PVC liner. E".uur. ttre pvc liners in Tailings cells l, z and 3 aresensitive to sunlight and can degrade as a result of prolonged ex-posure, inspectors arecautioned to observe any situation where the liner i. .*por"J. These "*porrrJ situationsare considered serious and require immediate attention. Inspectors are trained to covery3tt a1ry of exposure immediately, whereas, larger areu, ur. reported to the radiationSafety officer to prompt the issuancl of a work orier to tr," Maintenance Department. Inkeeping with this inspection requirement, inspectors are trained to obr"*" anydegradation of exposed liners. such degradation can be that caused by exposure tosunlight, abrasion due to erosive wave actiin and/or urt.ipr or tears in the liner material.Given the fact that the liner material is provided with ur lu.tt rn cover, erosive damageand/or rips and tears are unlikely. Inspectors are kained to record all observations ofliner exposure or disrepair on the'inspection report, "r *"tt as the date and nutur" of anyrepair activity.
Roberts Pond is lined with Hi Density Polyethylene (HDpE) material which is notsensitive to sun damagc and, as such, is not covered with earthen material. In this casethe inspector observes the conditions of the liner to the "*i"r, that visual observation ispossible (i'e' above the water level and any visually observable near surface condition).As is the case for the tailing cell inspections, the liner will be observed for any abrasiondue to erosive wave action and/or uny up, or tears in the liner material.
Liner Maintenance provisions-cells r ,2,3 andRoberts pond Dnt flan
Inspections
Appnla,d bV FeC- H-o{ O"t. aat ZooA
Repairs
Repairs to PVC liners in cells 1,2 and2 and to the HDPE liner in Roberts Pond are made
on a case by case i"* *a usually involves the installation of a repair patch over the
damaged location. pVC p""t es-require the use of glues or adhesive solvents to fuse the
patch to the repair io"utio.. HDPE repairs *t uJ"o*plished by use of an extrusion
welder. Subsequent to any repair of a iiner, the repair location will be tested using a
..vacuum box" and soapy water to assure that ihe '"puit is acceptable' The observation of
bubbles through the repair seam while- vacuum is teing applied to the seam constitutes
seam failure *a *rr;fi; must Ue redone until all seatns aie acceptable' in the case of
Cells t, 2, and3, after a patch ha* been applied, the 1enai1 location must be covered with
earthen material, again to avoid "*porrri.
to sunlight Adequate supplies.of Pvc and
HDPE liner materiiirlpuit materiai *Jrurrr* te-st equipment ar9 maif{13d either in
the Mill warehouse o, th" maintenance department' -TE continued availability of these
supplies will be verified as an element oiti," Quarterly Tailings Inspection conducted by
the Radiation Safety Officer or his designee'
Any leak, hole or other damage to the liners in Cells 1, 2,3 andthe Roberts Pond will be
reportedorallytotheExecutivesecretarywithin24hoursofthediscoveryandinwriting
within 5 days or'irr.-Ji.lor"ry. The oral and written notifications will include a
notificatibn.*a o"s.riptiot orth" fuilor. in accordance with Part I'G'3'(a) of the GWDP
,and,be in aocoi.dance with R317-6-6.16.c(1) of the regulations. In addition to the
descriptive inrorrrrutir., about*he failrrr., u pt* and-schedule for the FML repair will be
included *itn trro-noiification' to the Executive Secretary (in accordance with Part
I.G.3.(c) of the Permit);
Repair Report
EachreportwillbesignedbyaUtahlicensedprofessionalengineerandwilladdressthe
following elementJ;A"t apply to the case-by-gase'repairs which are implemented:
o Repair narrative describing the nature of the damage and the repair work
comPleted to rePair the damage'
o Repair material type used to complete the repair
o RePair material descriPtion
o Post rePairs test sPecifications
o Test Methods (ASTM or other)
o Daily reports during the repair work
o RePair test results
o QualityAssurance/QuaiityConffol Information
Page I of II)ave Rupp - 4th euarr". I DMT Report
1&,]qFi:sii+{F;re:3$::uFrr.l4;:}&rtr&t gn}sK.r,!Ss}Sffi:J$*.:] *::*di::-qtia:::dka$:{i$s:13s!:1t}:]tui:$tr:}M1$S;&1.-E&i
Steve Landau <[e-mail]>
Dane Finerfrock <DFINERFROCK @ utah.gov>3/212009 4:16 pM
4th Quarrer 2008 DMT ReporrDave Rupp <DRIIpp @ utal. gov>, David Frydenl und<DFrydenlund @ denisonminJs.com>
4th Q 08 DMT.pdf
Dear Mr. Finerfrock,
fiffi,,ff;.,l1il:3Jli,""flft:ifi:!,r,$?i Discharge Minimization rechnorosy perrormance srandard
lf you shourd have any questions regarding this report, prease contact me.
Sincerely,
Steven D. Landau
DENTSON MTNES (USA) CORP
www.denisonmines.com
This e-mail is intended for exclusive use the person(s) mentione_d as the recipient(s). This message and any aftached fires with it are conridentiar and mav:iJlill,:iliiT;".:',i1"f[*:?,IJ]riJ3*'*i1fl:il:ilii't+ffi,flftxii:'i,::i'"T"r"i""tii,,".,'"6"riiixJii,"v',n" sender you may not use,
From:
To:
Date:
Subject:
CC:
Attachments:
Steve Landau
Manager, Environmental Affai rs
t:{303) 389-4132 | t: (303) g1g_4j2s
1 050 1 7th Street, Suite g5d, Denver, CO 80265
file://c:\Documents and settings\Drupp\Local Setrings\Tempxpgrpwise\4gAc064gEQD... 3lgl2oog
White Mesa Uranium MillDMT Performance standard Monitoring Report
State of Utah
Groundwater Discharge permit No. UGW3 70004
4th euarter
October through December
2008
prepared By:
Denison Mines (USA) Corp.
1050 17ft Street, Suiie 950
Denver, CO. g0265
March,2009
DMT PERFORMANCE STANDARD MONITORING
1.0 Measurements Taken During the Quarter
DuringtheQuarter,thefollowingDMTMonitoringwasperformedoraddressed,as
,"q.ritla under Part I'E'7 of the Permit:
-WeeklytailingswastewaterpoolelevationsfortailingsCellsland3;
-Monthly slimes drain water levels;
-*""0', iu'i"*ut"' level measurements in Robert's Pond; and
-Weekly feedstock storage area inspections'
2.0 Weekly Taitings Waste Water Pool Elevation Monitoring
Miil personnei monitored and recorded weekly the elevation of wastewater in Tailings
cells 1 and 3 to ensure compliance with the maximum wastewater elevation criteria
mandated uy conoltion ro.l of the l'titt" Radioactive Materials License' These
measurement, *.rJ'*ud"-from ur, "t"rutlo, ..r*"y. The results of such monitoring'
reported as feet ,;;;;;sea level (fursl)' are included in Attachment A'
Conditionl0.3oftheMill,sRadioactiveMaterialsLicenseprovidesthatfreeboardlimits
for Cells 1 and 3 ,fraiC"-*, in a""odont" *itft procedures that have been approved by
the U.S. Nuclear n"g'f"t"iy Commission' Under those procedures:
(i) The freeboard limits are set as per the January 10' 1990 Drainage Report for Cell
1 at a liquiJ mu*im'm elevation of 5'615'4 frnsl; and
(ii) The freeboard limit for cell 3 is determined annually using a formula set out in
the procedrir;. ih; current n""u"*J ii.it fot cell i was calculated under this
procedure ",-!,ooi.o r*rr. Ho*"r.., in UDEQ correspondence date November
2A,l2oogund int".i* variance unJti*i, was established at 5'602'5 fmsl'
(iii) In conjunction with the variance established under (ii) above' an interim maximum
forCell44'wasestablishedxs,sgl.lq'AsofJanuary2,2oogCeIl4A,spond
elevation was 5,579'59'
In addition, Part I.D.2 of the Permit provides that under no circumstances shall the
freeboardgfanytailingscellbelessthanthreefeet,aSmeasuledfromthetopofthe
flexible membrane liner (..FML'). Th;;; oi 6" YLj" cell 1 is at 5'618'5 frnsl and
the top of the rvri ir'cell 3 i. ;-ir0s.5 fmsl. This means that the maximum
wastewater poof
'"i"r*tions in Cells i u"i g permitted under Part I'D'2 of the Permit are
S,Of S'S and 5,605'5 frnsl, respectively'
As indicated in the table below, the waste water pool elevations in cells 1 and 3' as
measured during the Quarter, diil ,'ot ex"""d the Groundwater Discharge Permit
Standard:
Table 6 - Summary of Waste Water Pool Elevations
Tailings
Cell
Maximum
Wastewater Elevation
Measured During the
Quarter (fmsl)
Maximum
Wastewater Elevation
Permitted Under
License Condition
Maximum
Wastewater
Elevation Permitted
Under Part I.D.2 of
10.3 the Permit
Cell I
Cell3
3.0 Monthly Slimes Drain Water Level Monitoring
pursuant to Part 1.F.2 of the Groundwater Discharge Permit and correspondence from the
UDEe dated February 7,2008, the results of monthly recovery monitoring of the slimes
drain for Cell2 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
gaph showing tire initial reading and the final reading for each month are included as
ettacnment B. These readings are 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 1.E.6.b) of the Permit this requirernent shall apply to Cell 3 only upon initiation of
tailings de-waiering operations. As Tailings Cell 3 is currently an active tailings cell and
de-witering op".utionr 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 Marclr 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 I.D.3 of
the Permit provides that the water level in Robert's Pond shall not exceed an elevation of
5624 fmsl. The results of such monitoring, reported as feet above mean sea level (frnsl),
are included in Attachment A.
'I'he maximum wastewater elevation measured in Robert's Pond during the quarter of
5,618.86 fmsl did not exceed themaximum 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
sestablishedincorrespondencedatedNovember20,2008
5,614.66
5,602.79
5615.4
5,602.51
5,615.5
5,605.5
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 theMill 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 Annual Slimes Drain Head Condition Evaluation
Pursuant to Part I.3.b)1) of the Permit, Denison has evaluated the annual head elevationwithin the Cell 2 Slimes Drain. The equation and result for the 2008 evaluation are
presented below, dernonstrating compliance with the Permit requirement related to year-
to-year head condition comparison. The Equation to satisfy is as follows:
sEy:IE,-r *IEye < IEv-r + IE,-2 + IEv-s
\ + \-, * Ny-z Ny-1 * Ny-z + Ny-l
Whereby;
IEv :6723s.16
IEv-r = 67242.64
IEv-z :67242.64
IEv-: :67242.64
Ny =12
Ny-r = 12
Ny-z : 12
Nr-3 : 12
Therefore, for the 2008 evaluation the following values apply
TEy*IEr-r *IEy-z = 67235.16+ 672qz.a++ anqz.aq = 2afi20.4= 560334Nv+ \-,* ry-, n+n+D 36
IEy-r *IE -z*IEr-:= 67242.64+ 67242.64+ 67242.64 =201727.9 = 5303.55\-r+ Ny-2* \-:
s603.34 < 5303.55
12+ t2+ t2 36
Therefore, the Permit Condition is satisfied and the Cell
is in compliance.
2 Slimes Drain dewatering for 2008
7.0 Signature and Certification
This document was prepared by Denison Mines (usA) corp. on March 2,20ag.
DENTSON MrNES (USA) CORP.
By:
David C. Frydenlund
Vice President, Regulatory Affairs and Counsel
Certification:
I certify, und;r penalty of law, that this document and all attachments wereprepared under my direction or supervision in a..ordun"e with a system designed toassure that qualified personnel properly gather ura *Juute the information submitted.Based on my inquiry of the petton o. persons who manage the system, or those personsdirectly responsible for gathering the information, the information submitted is, to thebest of my knowledge ancl belie{kue, accurate and complete. I am awarc that there aresignificant penalties for.submitting false information, in.iuoing the possibility of fine andimprisonment for knowing violations.
.. .t " .,. r', -"-t ,i '"u*l
,.:'rr't,,t' t:i *1'(.t'
o''n,' {''":-:,- " " {,',,,'David C. Frydenlund " F
Vice President, Regulatory Affairs and CounselDenison Mines (USA) Co.p.
Attachment A
Tailings Pond Elevations
4th Quarter Elevations
Date
10Bt2a0B
10t10t2008
10t17t2008
10/24t2008
10t31t2008
11t7t2008
11t14t20A8
11t21t2008
11t26t2008
12t5t2008
12t12t2008
12t19t20a8
12t24t2008
Cell 1
s614.24
5614.29
5614.14
5614.26
5614.59
5614.66
5614.18
5612.84
5613.07
5612.52
5612.39
5612.36
s612.64
Cell 3
5602.46
5602.04
5601.45
5601.75
5601.5
5601.32
5602.02
5602.76
5601.81
5601.12
5601.26
5602.28
5602.79
Dry
Dry
Dry
Dry
Dry
Dry
5618.24
5618.22
5618.21
5618.43
5618.86
5618.68
5617.98
Roberts Pond
Attachment B
oO
Locallon
MANTHLV TIEAT' MEA. UREfiTlEN'r rESr
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DENIS arE 6tB ::;: ) {\R #,\o. ,X i\h."r*- r#rt{l
Denison Mines (USA) Corp.
1050 17th Street, Suite 9S0Denver, CO 80265
USA
Tel : [phone]
Fax : [phone]i2S
www.denisonmines.com
MINES
February 2,2009
Sent VIA Electronic Mait (pDF) and Regular Mail
Mr. Dane Finerfrock
Executive Secretary
Utah Radiation Control Board
f!{g of Utah Department of Environmental euality168 North 1950 West
Salt Lake city, Utah g4114_5950
Dear Mr. Finerfrock:
Re: white Mesa Mill Discharge MinimizationTechnology (DMT) performance standard Report,3'd Quarter 200 g -UDEe R"equesi For Information
In accordance with UDF'Q correspondence dated December 17,200g,and received by Denison onDecember 22' 2008, the Department has requested additional information regarding its review of the3'd Quarter, zilos DMT."port. More specifically, the Department asked that Denison answer thefollowing question:
"Please explain andiustify why the changing water levels at the end of the recovery tests in questionare compliant with the terms of the DMr"piln, i.u. *p,;;;"'nt stabre conditions.,,
Denison Response:
The DMT Plan at paragraph 3.1.b.vi states that "on a monthly basis, the slimes drain pump will beturned off and the wastewater in the slimes.drain-acces;r;" will be allowed to stabilize for at least 90hours' once the water level has stabilized (based on no lrr'urg. in water level for three (3) successivereadings taken no less than one (l) hour apart)the water level of the wastewater will be measured andrecorded as a depth-in-pipe measurement on.the Monthly Data.Inspection form, by measuring thedepth to water below the water level measuring point on tt " slimes arain a""".1pipe.,,
In reviewing this matter with Denison monitoring technicians there was apparently a misunderstandingwith respect to the stabilization requirement. The technicians misunderstood the stabilizationrequirement and thought that stabili zationwas fulfilled if either the g0 rror, ,tuuili zationperiod hadbeen attained 'or' if 3 successive readings revealed no change. They did not realize that both
stabilization requirements must be met. In practice, the technicians had been taking the measurementafter allowing the water to stabilize for at least qo horr., on the interpretation that the consecutivereadings prong of the test was intended to deal with circumstances where the wastewater level maystabilize within the 90-hour period. The technicians noted this misunderstanding (independent of thecorrespondence from UDEQ) and rectified the measurement procedure such that both the 90 hourstabilization period and the 3 successive readings *iirr r" change requirement were adhered to for theDecember 15 through l8 measurement period. It is notabl", hJ*eu"r, tt uf ilr" recovery data indicatethe water level to be near stable within uq*t 80 hounl-and,lr1t the day five measurements representvery little rise in water level. More specifically, during this initial g0 hours the water level in theslimes drain tends to rise approximaiely l}-li ft, *h"i" readings taken on the final day indicate onlyabout a 0'2 ft' rise in watei level. For ihis ,"u.on, Denison maintains that, while these measurementsdid not fully comply with the DMT word_ing, u r"pr"r"rtative measurement was taken given therelatively small rise experienced on day.fivJ'ortesting.
-Ho*"r.r,
and as stated above, the samplingtechnicians have recognized this inconsistency and cJrrected the measurement protocol to fulfill bothstability requirements' In the next revision to the DMT plan the confusing language in this sectionshould be amended to prevent any possible future misinterpretation of thJmeasurement requirements.
If you should have any questions regarding this matter, please contact me.
Yours very truly,
, ^-/%TDrursox Mmrs (USA) Conp.
Steven D. Landau
Manager, Environmental Affairs
DEN'SONDII
MINES
DENrsod*
MINES
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel : [phone]
Fax : [phone]
wwwdenisonmines.com
December l, 2008
VIA Electronic Mail (PDF) and Reeular Mail
Mr. Dane Finerfrock
Executive Secretary
Utah Radiation Control Board
State of Utah Department of Environmental Quality
168 North 1950 West
salt Lake city, uT 84114-4850
Dear Mr. Finerfrock:
Re: Transmittal of the 3'd Quarter 2008 Discharge Minimization Technology Performance
Standard Monitoring Report
Please find attached the 3'd Quarter Discharge Minimization Technology Performance Standard
Monitoring Report for the White Mesa Mill.
If you should have any questions regarding this report, please contact me'
Yours very truly,
Steven D. Landau
Manager, Environmental Affairs
Cc: Ron Hochstein
David Frydenlund
David Turk
White Mesa Uranium MillDMT Performance standard Monitoring Report
State of Utah
Groundwater Discharge permit No. UGW3 70A04
3,d euafter
July through Septernber
2008
Prepared By:
Denison Mines (USA) Corp.
1050 lTth Street, Suite 950
Denver, CO. 80265
December 1,200g
DMTPERFORMANCESTANDARDMONIT0RINGREPORT
1.0 Measurements Taken During the Quarter
During the Quarter, the following DMT Monitoring was perfotmed or addressed' as
required under Part I-E'6 of the Permit:
-Weekly tailings wastewater pool elevations for tailings Cells 1 and 3;
MonthlY slimes drain water leve1s;
.Weekiy 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 t and 3 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 fi'om an elevation survey. The results of such monitoring'
repofted 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 with procedures that have been approved by
theU.S.NuclearRegulatoryCommission.Underthoseprocedures:
(i) The freeboard limits are set as per the January 10, 1990 Drainage Report for Cell
I at a liquid maximum elevation of 5,615'4 fmsl; and
(ii) The fieeboard limit for Cell 3 is determined annually using a formula set out in
the procedure. The current freeboard limit for cell 3 was previouly 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 cell4A 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 iailings cell be less than three feet, as measured from the top of the
flexible *"mbrun" 1i# i..rrtau,). The top of the FML in cell r 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 u.ti : permitted under Parl 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 I - Summary of Waste Water pool Elevations
Tailings
Cell
Maximum IVIaximumryraxrmum MaximumWastewater Elevation Wastewater Elevation WasfpworrWastewaterMeasured During the permittecl Under
Quarter (fmsl)License Condition
Cell 3 s602.49 5,602.51 5,605.5
I An interim maximunr wastewater elevation was established in correspondence dated Novernber 20, 200g
Note: An interim maximum elevation of 5,593.74 fmsl for Cell 4.A has been establishedin correspondence from UDEQ dated November io,-)6og Fluid was first introducedinto cell 44 on september 26, 2ool and the base measurement position for cell 44elevation was established on ociober 3, 2008. Accordingly, formal water level elevationrecoding was initiated subsequent to the octobe, :, zlos establishment of the basemeasurement location, albeit the water level in cetl +e was well within the maximumelevation for the 5 days of September operations as fluid had only just begun to bereceived by Cell 4,A..
3.0 Monthly Slimes Drain Water Level Monitoring
Pursuant to Part l 'F'2 of the croundwater Discharge Permit and corespondence from theUDEQ dated February 7,2008, the results_ of morrThly r""or".v monitoring of the slimesdrain for cell2 are to be recorded and included with irre resutts of quarterly monitorin inthe Quarterly Report. In accordance with th_ese requi*."rtr, the monthly readings and agraph showing the initial reading and the nrur ."uiing-ro, .u.r, month are included asAttachment B' These readings aie to be collected duririg a 90 hour recovery period afterthe slimes drain pump has been tumed off in order to dftermine the static water level inthe drain (head) after this short cessation in pumping.
In Part 1'E'6'b) of the Permit this requirement shall apply to cell 3 only upon initiation oftailings de-watering operations' As Tailings cell 3 Ir iuo*trv an active tailings cell andd-e-watering operations have not commenced, no such measurements will be made in theslimes drain access pipe for ceil 3 in the foreseeable fiitul-e.
4'0 weekly wastewater Lever Monitoring: Roberts pond
Mill personnel monitored and recorded weekly, commencing on March g, 2005, theeffective date of the Permit, the wastewater levels at Roberts pond to determinecompliance with the DMT operations standards in part I.D.3. of the permit. part I.D.3 ofthe Permit provides that the water level in Robeft's pona ,rrutt not exceed an elevation of5624 fmsl' The results of such monitoring, reported u, r""tabove mean sea level (fmsl),are included in Attachment A.
Elevation Permitted
Under Part I.D.2 of
The maximum wastewater elevation measured in Robert's Pond during the quarter of
5,61g.1g frnsl did noi '*.."a the maximum permitted elevation of 5,624.0 fmsl'
5.0 Weekly Feedstock Storage Area Inspection
weekly feedstock storage arel iryr^ections were performed by the Radiation safety
Department, commJniinE on Malch 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 prr*it and that all alternate feedstock rocated outside the defined
feedstock u."u urr-1nuirr,ri".a,yi,1r1n water tight containers' The results of these
inspections ur" ,".ora.J on tt " Weekly Mill Insplction Forms' which are available at the
Mill for inspection. No variunce in stored materipls from this requirement or ieaking
alternate feedstock arum, or other alternate f,eedstock coniainers were observed during
the inspections.
6.0 Signature and Certification
This document was prepar€d by Denison Mines (USA) Corp' on Novembet 28,2008'
Certification:
I certify, under penalty of law, that this document and all attachments were
prepared undei my direction or supervision in accordance with a system designed to
urrrrr" that qualifi"a p"rro*el properly gather and evaluate the information submitted'
Based on *y inquiry of the perion or persons who manage the system, or those persons
directly ,"rporrribl"'for gathering the lnformation,- the information submitted is' to the
best oimy inowledge uria rcf"{true, accurate and complete' I am aware that there are
rigrin"*t penalties?or submitting false information, including the possibility of fine and
imprisonment for knowing violations'
Bv: /l /
,^",u{!,K
Vice Presidint, Regulatory Affairs and Counsel
Vice Presidint, Regulatory Affairs and Counsel
Denison Mines (USA) CorP.
Attachment A
Tailings Pond Elevations
3rd Quarter Elevations
Date
Free Board
7-Jul-08
11-Jul-08
1B-Jul-08
25-Jul-08
31-Jul-08
B-Aug-08
15-Aug-08
22-Aug-08
28-Aug-08
5-SeP-08
12-SeP-08
19-SeP-08
26-SeP-08
Cell 1
5615.40
5612.35
5612.41
5612.5
5612.64
5612.75
5612.94
5613.16
5613.4
5613.6
5613.85
5614.14
5614.5
5614-44
Gell 3
5601.60 5624.00
56'18.12
5618.19
5618,06
Dry
561 B
5601 .16
5601.06
5601.3
5601.29
5601.14
5600.85
Dry
Dry
Dry
Dry
Dry
Dry
Dry
Dry
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a,nl,'/
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l,ni/
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Attachrncnt B
Locatlon
MOfUTF'I.T PTEA D MEAS {.'REtr'EruT TES T'
Slimee Cell # 2
Date
$ampler
#
0700
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0800
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1300
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M O NTiil.V iT EA{' fiflEASUREfl8FJV T TEST
Date
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Comments
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Sltrmes Celf # 2
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November 5,2008
VIA FEDERAL EXPRESS AND ELECTRONIC MAIL (PDF)
Mr. David A. Rupp P.E.
Utah Department of Environmental Quality
168 North 1950 West
P.O. Box 144810
Salt Lake City, uT 84114-4910
Dear Mr.Rupp,
Re: State of Utah Ground Water Discharge Permit No. UW370004 (the..GWDP,) White
Mesa Uranium Mill- Revised DMT Performance Standard Monitoring Reports for theI't and 2"d Quartersr 2008
Please find enclosed two revised DMT Performance Standard Monitoring Reports for the I't and 2nd
Quarters of 2008. These revisions are in response to our conversation of October 1, 2008 and your
review correspondence dated October 1, 2008 (which was received by Denison on October O, iOOS;.
In your review you noted that an incorrect maximum elevation limitation was indicated in column j of
the Waste Water Pond Elevations Table for the first and second quarter text portion of the reports, and
that the value recited under Section 4.0 of the 2"d Quarter Report for the Roberts pond maximum
elevation limit appeared to be in error. The values which appeared in column 3 were the result of a
transcription error generated during the creation of a document template for the euarterly DMT
reports. With regard to the maximum value limitation cited for Roberts Pond in Section 4.0 of the 2'd
Quarter Report, I am unable to ascertain the initial source of this error except to note that it was
typographical in nature.
If you should have further questions or require additional information, please contact me.
Yours very truly,/*rru
DtxrsoN MrNns (USA) Conr.
STBvEN D. LeNoeu
Manager, Environmental Affairs
cc: Ron Hochstein
Harold Roberts
David Frydenlund
David Turk
White Mesa Uranium MilIDMT Performance standard Monitoring Report
R srb*'o!"out
,niNh co '' t -
rtL( OL6,'r n4*"'
State of Utah
Groundwater Discharge permit No. UGW3 70004
2nd euarter
April through June
2008
prepared By:
Denison Mines (USA) Corp.
1050 l7,h Street, Suiie 950
Denver, CO. 90265
August 29,200g
Revised Text November 5, 200g
DMT PERFORMANCE STANDARD MONITORING
1.0 Measurements Taken During the euarter
During the Quarter, the following DMT Monitoring was performed or addressed, asrequired under part I.E.6 of the permit:
-Weekly tailings wastewater pool elevations for tailings Cells I and 3;-Monthly slimes drain water levels;
-weekly wastewater lever measurements in Robert,s pond; and-Weekly feedstock storage area inspections.
2'0 weekly Tailings waste water pool Erevation Monitoring
Mill personnel monitored and recorded weekly the elevation of wastewater in TailingsCells I and 3 to ensure compliance with the maximum wastewater elevation criteriamandated by Condition 10.3 of the Mill's Radioactive Materials License. Thesemeasurements 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 l0'3 of the Mill's Radioactive Materials License provides that freeboard limitsfor cells I and 3 shall be set in accordance with proceJures that have been approved bythe U.S. Nuclear Regulatory commission. Underihor" p.oc"dures:
(i) The freeboard limits areset as per the January 10, 1990 Drainage Report for CellI 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 inthe procedure. The current freeboard limit for Cell 3 was calculated under thisprocedure at 5,601.6 frnsl.
In addition, Part r'D.2 of the Permit provides that under no circumstances shall thefreeboard of any tailings cell be less than three feet, u, -"urr,..d from the top of theflexible membrane liner ("FML"). The top of the FML in cell I is at 5,61g.5 ftnsl andthe top of the FML in cell 3 is at 5,608.5 fmsl. This means that the maximumwastewater pool elevations in Cells I and 3 permitted under part 1.D.2 of the permit are5,615.5 and 5,605.5 fmsl, respectively.
As indicated in the table below, the waste water pool elevations in Cells I and 3, asmeasured during the euarter, did not exceed these re-gulatory standards:
Table 6 - Summary of Waste Water pool Elevations
Tailings
Cell
Maximum
Wastewater Elevation
Measured During the
Quarter (fmsl)
Wastewater Elevation
Permitted Under
License Condition
Maximum
Wastewater
Elevation Permitted
Under Part I.D.2 of
Maximum
10.3 (fi the PermitCell I
Cell3
5,612.49
5,601.61
5615.4
5,601.6
5,615.5
5,605.5
3.0 Monthly Slimes Drain Water Level Monitoring
Pursuant to Part l 'F'2 of the Groundwater Discharge Permit and correspondence from theUDEQ dated February 7 , 2008, the results of monThly ,".or"ry monitoring of the slimesdrain for cell2 are to be recorded and included withiheresults of quarterly monitorin inthe Quarterly Report. In accordance with th-ese requirements, the monthly readings and agaph showing the initial reading and the nna reaaing for each month are included asAttachment B' These readings are to be collectea ouririg a 90 hour recovery period afterthe slimes drain pump has been turned off in order to dEtermine the static water level inthe 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 oftailings de-watering operations. As Tailings cell 3 is cunently an active tailings cell andde-watering operations have not commen.id, ,ro such measurements will be made in theslimes drain access pipe for celr 3 in the foreseeable future.
4.0 Weekly Wastewater Level Monitoring: Roberts pond
Mill personnel monitored and recorded weekly, commencing on March g, 2005, theeffective date of the Permit, the wastewater levels at Roberts pond to determinecompliance with the DMT operations standards in part I.D.3. of the permit. part I.D.3 ofthe Permit provides that the water level in Robert's Pond shall not exceed an elevation of5624 frnsl' The results of such monitoring, reported u. r.l above mean sea level (fmsl),are included in Attachment A.
The maximum wastewater elevation measured in Robert's pond during the quarter of5,620.84 fmsl did not exceed the maximum permitted elevatio n of 5,624.0 fmsl.
5.0 Weekly Feedstock Storage Area Inspection
weekly feedstock storage area inspe.lio^ were performed by the Radiation safetyDepartment, commencing on March 8, 20o5,the effective date oith" p;i, i, confirmthat the bulk feedstock materials are stored and maintained within the defined areadescribed in the Permit and that all alternate feedstock located outside the definedfeedstock area are maintained within water tight containers. The results of theseinspections are recorded on the weekly Mill Insplction rorms, which are available at the
Mill for inspection. No variance in stored
alternate feedstock drums or other altemate
the inspections.
6.0 Signature and Certification
materials from this requirement or leaking
feedstock containers were observed during
This document was originally prepared by Denison Mines (usA) co.p. on August 29,
3:::..T1.,:ff:i}".d here on November 5, 2008 with modification of thi text based uponreview by U
Vice President, Regulatory Affairs and Counsel
Certification:
I certify, under penalty of law, that this document and all attachments wereprepared under my- direction or supervision in accordance with a system designed toassure that qualified personnel properly gather and evaluate the information submitted.B.ased on my inquiry of the person or persons who manage the system, or those personsdirectly responsible for gathering the lnformation, the iriformati,on suLmitted is, to thebest of my knowledge and behe{true, accurate and complete. I am aware that there aresignificant penalties for submitting false information, inclrding the possibitity ornne anaimprisonment for knowing violations.
Vice President, Regulatory Affairs and Counsel
Denison Mines (USA) Corp.
Attachment A
Tailings Pond Elevations
2nd Quarter Elevations
Date
Free tsoard
4-Apr-08
11-Apr-08
18-Apr-08
2S-Apr-08
5-May-08
9-May-08
16-May-08
23-May{B
30-May{B
6-Jun{8
13-Jun{8
20-Jun-08
27-Jun-08
Cell 1
5615.40
5612.21
5612.'t6
5612.18
5612.07
5612.15
5612.10
5612.01
5612.24
5612.02
5612.48
5612.44
5612.46
5612.40
Cell 3
5601.60
5601.16
5601.35
5ffi1.27
5600.95
5600.76
5601.17
5601.09
5601.47
5601.35
5601.13
5601.47
5601.61
5601.51
Roberts Pond
5624.00
5618.25
5618.72
5618.76
5618.s4
5619.45
5620.01
5620.68
5620.84
5619.52
Dry
5617.78
56't7.59
5614.94
Attachment B
Locatlon
MANTFILY NEAD MEASUREMENT TEST
Date
Sampler
\ 2*. AY
l; u l.ol*.
s. I
12. Ltq
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1400
1200
'r500
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s.s.ay Qw frt &4
,, ( /6,'-24 '
fuo,reo P^^f b"'lr-
N.'
Locatlon
fl,t0rufHfy HEAD NIEASUREMENT rESr
Date
Sampler
0700
Slrlme,e CelI # 2
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WELLNAME
WELL SUR\IEY 2OO8
NORTIIING EASTING CASEELEV.
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GRND.ELEV.
SLIME IIELL#2 321j22.U 2.578.589,87 5614.83 NOTNEEDED
State of Utah
Department of
Environmental Quality
Richard W. Sprott
Executive Director
Division of Radiation Control
Dane L. Finerfrock
Director
,o* *. JTMAN, rR
Governor
GARY HERBERT
Lieutenant Governor
April 10,2008
Prur +b e';n
Su..,tr) C7
";:*nr
CERTIFIED MAIL
(Return Receipt Requested)
Mr. Steven D. Landau
Manager, Environmental Affairs
Denison Mines (USA) Corp.
1050 Seventeenth Street, Suite 950
Denver, CO 8026;5
Dear Mr. Landau:
SUBJECT:2007 Fourth Quarter Discharge Minimization Technology (DMT) Performance StandardMonitoring Report for the White Mesa Uranium Mill.
Cell2 Slimes Drain Monitoring: Confirmatory Action Letter with Comments and
Recommendations
We received the subject fourth quarter report on February 28,2008. As you will recall, effective March17,2008, Part I.F.2 of the Ground Water Discharge Permit requires this ieport be submitted for ExecutiveSecretary approval. However, at this time the report need not be approved.
Comments:
we have reviewed the subject report, and have the following comments:
A). From the reported static water levels on the subject, we observe that there is a general trend for thewater level to be rising in this slimes drain during 2007. We determined the average distance towater level reported for the year 2007 to be I 1.29 feetbelow the access pipe measuring point,
corresponding to a depth in pipe elevation above the slimes drain bottom of ZO.l t feet 1iS.OO -lI -29). This elevati on of 26.7 I feet will be used as the 2007 average elevation value in equation 1 ,found in Part I'D.3 of the current ground water discharge permit. This value will be incorporatedinto the permit at the next modification.
B). We observed that on four (4) inconsecutive months (July, August, October, and November) of2007 the cell 2 slimes drain pump was found to be not operating when the monthly inspectorsarrived. No information was provided in the report regarding timing of pump repairs or theduration of pump breakdowns.
I 68 North I 950 west ' Po Box I 44850 . Salr Lake Ciry, UT 841 t4-4850 . phone (801 ) 536-4250. fax (801 ) 533-4091
T.D.D. (801 ) 536-441 4 . www.de q.utah. gov
Mr, Steven D. Landau
April 10,2008
PageZ
As required by the part I.D.3.b.1 of the permit, "the Permittee shall at all times maintain the average
*urt"irut., head in the slimes drain access pipe to be as low as reasonably achievable in each tailings
disposal cell, in accordance with a DMT Monitoring Plan. Compliance shall be achieved when the average
annual wastewater recovery elevation in the slimes drain access pipe, determined pursuant to the currently
approved DMT Monitoring Plan, meets the conditions in Equation I . . ." We acknowledge that
compliance in this matter iannot be determined until after submittal of the 4h Quarter, 2008 DMT
Monitoring Report.
Recommendation:
I, frglrt "f th" "b"ve findings DUSA may need to make changes to the DMT Monitoring Plan and make
other efforts to ensure future compliance with the requirement for declining annual average head in the
Cell2 slimes drain.
Confirmatory Action:
H"*"*rJh" "t"rrttons of the slimes drain need to be expressed in terms of elevation above mean sea
level. Therefore, the elevation of the water level measuring point on the slimes drain access pipe needs to
be surveyed to establish its elevation. This elevation shall be certified in writing by a Utah Registered
Land Surveyor or professional Engineer. In a conversation with you and Mr. David Rupp of this office on
April4, ZUjS you agreed to supply the above survey information in writing to DRC by the next quarterly
Divlt performance Standard Monitoring Report due June 1,2008.
If you disagree with the above commitment and compliance schedule. please respond in writing within
three (3) working days of receipt of this letter.
UTAH RADIATION CONTROL BOARD,
Dane Finerfrock
Executive SecretarY
LBM:DAR:dr
F:\drupp\DuSA\GWDhelated docs\DMT\ 2007 4th Qtr 03-08 cmtlb'dG
(6/4/20-08) Lg ren t\l[orto 1"t ;- Sl i m e__s"
From:
To:
CC:
Date:
Subject:
Attachments:
Loren,
"Steve Landau" <[e-mail]>
"'Loren Morton'" <[e-mail]>
<dfrydenlund@denisonm ines.com>, <[e-mail]>
6/4/08 10:21 AM
Slimes #2 elevations
Annual{ails-survey&slim es-Elev..PDF
Regarding the elevation of the Cell 2 Slime Drain, attached is the official
report dated June 2, 2008 from our surveyor. The survey of the Cell 2 Slime
Drain was completed on May 31 and is found on the final page of the report.
Steven D. Landau
Manager, Environmental Affairs
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
[phone]
[phone] Fax
Regarding the elevation of the cell 2 slime Drain, attached is the official report dated June 2, 2008 fromour surveyor' The survey of the cell 2 slime Drain was .o*pr"i"o on May 31 and is found on the finalpage of the report.
Loren,
Steven D. Landau
Manager, Environmental Affairs
Denison Mines (USA) Corp.
1050 '1 7th Street, Suite g50
Denver, CO 80265
[phone]
[phone] Fax
isher & Sons Surveying
414 South 100 West
Blanding Utah 84511
(43s) 678-2465
June 2, 2008
Dennison Mines, Inc.
c/o Ryan Palmer
6425 South Highway l9l
P.O. Box 809
Blanding Utah 8451I
Dear Ryan:
,oor. 'n"
checking ofthe points at celr 4 and cell 3 was completed on Saturday, May 3r,
As was mentioned p ygu: we couldn't get to the points of the south berm of ceil 4 due tothe contractor working on the lining of the celi In going over the berm itself we noticed thatseveral of the rebar which were set for the monitoring were exposed and bent over. From this wedon't think that any future monitoring of trrese points wourd serve any puqpose at a[.
At first we thought that if we had the coordinates for some ofthe other control points at
[:,T'* 400, we wourd be abre to reset 400 and Jo trre checkinc f;;;; arong the top of
rwiewing the situation we feel it would be more feasible to wait until the work ofrebuilding celr 4 is compreted before sening moniio, points -A;;";;;;s most rikelywould have to be set for monitoring shift wien tr," *ort on tt"."u i, ""rrir.la.
Enclosed are the results of tfrg work performed and the statement. Included is the reportfor the slime welr #2 and a copy ofthe Statement for rast year,s work on the monitors.
Ifyou have any questions, please contact us.
Sincerely,
--?6,44*
Alexander A Fisher, R.L.S.
414 South 100 West
Blanding, Utah 845il
MonitorNumber
2008 Annual Movement Monitor Survey for Cell 3
Upstream Dowrctrcam Elevation
3A Conkol 0 0 s607-72
303 ll 56W.79
304 .05 5607.80
30s .07 5607.90
306 .08 5607.90
3W .t0 sffi1.49
308 .u 5607.53
309 .09 s607.54
310 .01 5607.57
311 .01 s607.78
312 .10 5607.79
313 .08 5607.85
314 .t0 5608.97
315 t5 5607.99
316 .13 5607.86
3t7 .08 5607.58
318 Disturb€d .24 5607.65
319 .15 5607.s6
320 t7 5607.9532t.07 s607.96
322 .08 5608.03
323 .14 5607.90
324 t2 5607.86
325 t5 5607.42
326 l4 5607.63
327 II 5607.87
328 .10 5607.99
329 t2 5607.91
330 .03 5607.63
331 .00 5607.45
332 IO 5608.00
333 Control (Sight)0 0 5608.27
MouitorNumber
2008 Annual Movement Monitor Survey for Ceil 4,{
Upstream Dowrutream Elevation
400 Control 0 0 5584.85
401 .06 5596.83
402 .00 5598.09
403 .09 5598. I6
404 ,09 5598.12
405 n .o7 5598.08
406
'r-Jo .07 5598.04
4W JD-.07 5598.15
408 a\,
.10 5598.01
409 08 5598.0r
410
^V .08 5598.04
4lt <V ,,,,.05 5597.73
412 .09 5597.69
413 il .,/.07 5597.75414 h--\.09 5597.74
415 .06 5597.y2
416 .08 5597.96
417 .07 5598.06
418 .03 55yt.9z
419
,02 5597.62
420
.03 55n.97
42t
.00 s598.05
422
,00 5597.97
423 .02 5597.93
424
.06 5598.10
425 05 5598.23
426
.07 5598.47
427 ,06 5598.78
428 Control 0 0
429 Contol
AXO Contol
Monitor Number
2008 Annual Movement Monitor Survey for Cell 4
Upstream Downstream Elevation
43I eonkol .09 5596.78
432 .07 5597.30
433 .09 5598.87
434 .08 5598.46
435 .05 5598.4r
436 .15 5598.67
437 .29 5599.72
438
,24 5600.36
439 REMO\IED
440 (Straightened).16 5601.30
441 .28 5601.79
442 .17 5602.32
443 .t2 5602.91
444
,10 5603.33
445 .06 5604.07
446 .10 5fi4.46
447
,01 5604.49
448 .12 56{N.91
449
,10 5605.54
450 l3 5606.02
451 00 5606,85
452 Control 0 0 5607.44
453 Contol 0 0 5584_69
454 .17 5587.65
45s Dishubed .18 5589.49
456 .27 5589.92
457 Disturbed ..23 5591.44
458 Conhol 0 0 5595.33
459 Control 0 0 5584.69
460 ,02 5574.47
461
.02 5574.23
462 .05 5573.70
463 .04 5572.92
464 Control 0 0 5569.8t
WELLNAME CASEELEV.GRND.ELEV.
White Mesa Uranium MilIDMT Performance standard Monitoring Report
paoulil;t**'*ith
!or'*. o-
7"'rr1r'X'
State of Utah
Groundwater Discharge permit No. UGW3 70004I't euarter
January through March
2008
prepared By:
Denison Mines (USA) Com.
lo5o l7* str""i, suiie 950
Denver, CO. g0265
May 29,200g
Revised Text Novernber 5,200g
DMT PERFORMAI\CE STANDARD MONITORING
1.0 Measurements Taken During the euarter
During the Quarter, the following DMT Monitoring was performed or addressed, asrequired under part I.E.6 of the permit:
-Weekly tailings wastewater pool elevations for tailings Cells I and 3;-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 poor Erevation Monitoring
Mill personnel monitored and recorded weekly the elevation of wastewater in Tailingscells I and 3 to ensure compliance with the maximum wastewater elevation criteriamandated by condition 10.3 of the Mill's Radioactive Materials License. Thesemeasurements were made from an elevation survey. The results of such monitoring,reported as feet above mean sea level (fmsl), are includedin Attachment A.
condition 10'3 of the Mill's Radioactive Materials License provides that freeboard limitsfor cells I and 3 shall be set in accordance with proceJures that have been approved bythe U.S. Nuclear Regulatory commission. underirror" pro""dures:
(i) The freeboard limits are set as per the January 10, 1990 Drainage Report for cellI 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 inthe procedure. The current freeboard limit for Cell 3 was calculated under thisprocedure at 5,601.6 fmsl.
In addition, Part r'D'2 of the Permit provides that under no circumstances shall thefreeboard of any tailings cell be less than three feet, u. -.urr."d from the top of theflexible membrane liner ("FML"). The top of the FML in cell I is at 5,6rg.5 fmsr andthe top of the FML in cell 3 is at 5,608.5 fmsl. This means that the maximumwastewater pool elevations in cells I and 3 permitted under partr.D.2 of the permit are5,615.5 and 5,605.5 fmsl, respectively.
As indicated in the table below, the waste water pool elevations in cells I and 3, asmeasured during the euarter, did not exceed these re'gulatof standards:
Table 6 - Summary of Waste Water pool Elevations
Tailings
Cell
Maximum
Wastewater Elevation
Measured During the
Quarter (fmst)
Wastewater Elevation
Permitted Under
License Condition
Maximum
Wastewater
Elevation Permiffed
Under Part I.D.2 of
Maximum
10.3 (fms the PermitCell I
Cell3
5,612.95
5,601.60
5615.4
5,601.6
5,615.5
5,605.5
3.0 Monthty Stimes Drain Water Level Monitoring
Pursuant to Part 1'F'2 of the Groundwater Discharge Permit and correspondence from theUDEQ dated February 7,2008, the results- of monThly r"ror"ry monitoring of the slimesdrain for cell 2 are to be recorded and included with ihe results of quarterly monitorin inthe Quarterly Report. In accordance with th-ese requirements, the monthly readings and agraph showing the initial reading and the nnat reaaing for each month are included asAttachment B' These readings are to be collected durfg a 90 hour recovery period afterthe slimes drain pump has been turned off in order to dltermine the static water level inthe 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 oftailings de-watering operations. As Tailings cell 3 is iunently an active tailings cell andd-e-watering operations have not commenced, no such measurernents will be made in theslimes 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 g, 2005, theeffective date of the Permit, the wastewater levels at Roberts pond to determinecompliance with the DMT operations standards in Part I.D.3. of the permit. part I.D.3 oft]t9 Permit provides that the water level in Robert's porJ ,nuu not exceed an elevation of5624 fmsl The results of such monitoring, reported ur i".t above mean sea level (fmsl),are included in Attachment A.
The maximum wastewater elevation measured in Robert's pond during the quarter of5,621.52 fmsl did not exceed the maximum permitted elevatio n of 5,624.0 fmsl.
5.0 Weekly Feedstock Storage Area Inspection
weekly feedstock storage area inspe.lr* were performed by the Radiation SafetyDepartment, commencing on March 8, 2005, the effective date of the permit, to confirmthat the bulk feedstock materials are stored and maintained within the defined areadescribed in the Permit and that all alternate feedstock located outside the definedfeedstock area ate maintained within water tight containers. The results of theseinspections are recorded on the weekly Mill InspJction Forms, which are available at the
Mill for inspection. No variance in storedaltemate feedstock drums or other alternate
the inspections.
6.0 Signature and Certification
This document was originally prepared u1lgnison Mines (usA) corp. on May 29,200g
f-,q": l:lttffi1.,nere on November 5, 2008 with modification of the text b'ased upon
materials from this requirement or leaking
feedstock containers were observed during
review by UDEe.
::,. ilr und
Certification:
I certify, under penalty of law, that this document and all attachments wereprepared under my direction or supervision in accordance with a system designed toassure that qualified personnel properly gather and evaluate the information submitted.Based on my inquiry of the-person or persons who manage the system, or those personsdirectly responsible for gathering the lnformation, the in?ormation submitted is, to thebest of my knowledg-e and belief, true, accurate and complete. I am aware that there aresignificant penalties for.submitting false information, irr"iirairg the possibility of fine andimprisonment for knowing violatiJns.
Vice President, Regulatory Affairs and Counsel
Denison Mines (USA) Corp.
Tailings Pond Elevations
1st Quarter Elevations
Date
Free Board
4-Jan-08
10-Jan-08
18-Jan-08
24-Jan-08
3'l-Jan-08
8-Feb-08
1 5-Feb-08
21-Feb-08
29-Feb-08
6-Mar-08
14-Mar-08
21-Mar-08
28-Mar-08
Cell 1
5615.40
5611.47
5611.69
5611.67
5611.75
5612.12
5612.85
5612.47
56't2.55
5612.73
5612.53
5612.s4
5612.47
5612.21
Gell 3
5601.60
5601 .13
s601.28
5601.53
s601.6
5601.59
5601.24
5600.75
s600.87
s601.6
5601.35
5601.2
5600.83
5601.27
5624.00
5620.78
5620.73
5621.16
5621.52
5621.03
5617.4
5617.61
5617.75
5618.86
5617.5
5617.5
5617.79
5618.03
Roberts Pond
Attachment B
Locatlon
ryqNTHLY HEAD MEASUREMENT TEST
Date
SamplerSllmes Cetf # 2
-0700
0800
-
0900
1000
-
1100
-
1200k
1300
-
1&O
-
1500k
2l
-21. t'7
t8.3L
11 8o
-
tl.zi
-
/t.77k
l[ .ss
-
l[ 'oz
-
lr4/L
-r3.{f
' l3 .3,
-
tJ Z1
t3. tl
-
t3.tI
13.0 {ry
r?.12
t?.fiL
-
lz-El
-
-
23
t?. oL
tz. tb
t?.o (
rr.fl
tt.7 I
-
/t- &i
tt. ff ,,
tt. ?3
lt,. If
ll. tCt -
- lt .0?
t(' 01
lo:,,i g
t0.%
/n.17
-
tt.46
lt €o
la-tu)
-
,r*-
z\t
It'?Ll
-
il. !1-
il.1L
4t
4ec>
-
Comrnents
Kyrr- U*l,,n"r
14.tl
Locatlon
MONTHLY HEAD MEASUREMENT TEST
Date
SamplerSllmee Getf # 2
0700ry
0800
-
0900
-
1000
-
1100k
1200
-
1300
1400
-
1500
-
2-z{
M
2l.s{
%.w
/ ?.62
/{o I
TTJZ
It_,_12
t r.0(T
,2-2[
J3.vs.
6.0?
!2.6!_
t3.yLl
-
t3.?,L
t?.f(
B:l{
t3t3
ts.13
-
z-27
lt.?s
12.23
tz.tl
f? .t'{
17.t0
2.2 r
HEtl2,oy _Ettrlt.ff
Wil.fz
ll-t€
tt z7
tt.7L
1t.77
Comments
Loeatlon
MONTHLY ,IEAD MEASUREI,iIENT IEST
Date
SamplerSllmes Getf # 2
0700
-
0800
-
0900
-
1000
1100
-
1200
-
1300
-
1400
-
1500
/loo
.?-l?
22.11{<
2t.sz
M.7Z
t4. u
tr.fo
lL.qz
r? .41
ft.a7
JIJI-
3't X
)Lt Ll (
-tY.?q
/t-to
t3.(L
,lr<,.7,y_
t3-bl
JU.S
',3. {6
t 3,40
t3.i7
,.z.lq
t2.51
t2-sz
t7 .,11
t2. 1? _
t7 -\L
tt -27
i?-?I
r?-7L
tL.( 1*
l?u t{
3-Zt
-it.23
-
fi. zl
-
tt .11
il.tg:r-
ll'rS
)t.tz
ha?
ll. ox
tt.03
3-Zo
tl. L7
il. 65
ll. t '{
rl [,2,,
l,l.sg
)L5S
il s3-
tt.Lt 1
il.try
tl. {z'
Comments
3,t7.1"-@
@oI
TJ-
@oI-
NoIo
oco
Eo
o(Eo
=c'd
o
oo
.E6(\t
o
C)
RP
(rD rqfff or rndrO
White Mesa Uranium Mill
DMT Performance Standard Monitoring Report
State of Utah
G roundwater Discharge Perm i t *u. g 6 r't/ 3 70004
2"'l Quarter
April through June
2008
Prepared By:
Denison Ivlines (USA) Cotp.
1050 17tl'Strcet, Suite !)50
Denver, CO.. 80265
August 29, 2008
A*fi":5'\
('r'^"')'
,
,19fr
DMT PERFORMANCE STANDARD MONITORING
1.0 lVleasurelnents'l'al<en During the Quarter
During the Quarter, the following DMT Monitoring was perfonned or aclclressecl, asrequired under Paft I.E.6 of the Permit:
-Weekly tailings wastewater pool elevations for tailings Cells I and 3;
-Monthly slimes dmin water levels;
-weekly wastewater rever measurements in Robert's pon<l; and
-Weekly feedstock storage area inspections.
2.0 Wcekly Tailings Waste Water pool Elevation Monitoring
Mill personnel monitored and recorded weekly the elevation of wastewater in T'ailingsCells I and 3 to ensure compliance with the maximum wastewater elevation criterianrandated by Condition 10.3 of the Mill's Radioactive Materials License. Thesemeasurelnents wcro made fiom an elevation survoy. 'Ihe results of such monitoring,reported as fbet above mean sea level (finsl), are included in Attachment A.
Condition 10.3 of the Mill's Raclioactive Ivlaterials License provicles that fieeboard lirnitsfbr Cells I anrl 3 shall be set in accorclance with procedures that have been approved bythe u.s. Nucleeu Regulatory commission. Under those pr-ocedures:
(i) The fi'eeboarcl limits are sct as per the January 10, 1990 Drainage Report for CcllI at a liquid maximum elevation of 5,(r15.4 finsl; ancl
(ii) The freeboard lirnit for Cell 3 is clctermined annually using a tbgnula sct out in
the procedure. The cun'ent freeboard lirnit fbr Cell 3 was caiculatecl uncler this
procedure at 5,601 .6 fmsl.
ln addition, Part t.D.2 of the Pennit providas that untler no circumstances shall thetieeboard of any tailings cell be lcss than thrce t'eet, as measured tiom the top of theflcxible menlbrane liner ("FN{L";. The top of the FIvIL in Cell I is at 5,61g.5 fmsl andtl're top of the FML in Cell 3 is at 5,608.5 finsl. This means that the nraximumwastervater pool clevatiotrs in Cells 1 anci 3 pennittecl uncler Part i.D.2 of thc pennit are5,615.5 and 5,605.5 linsl, respectively.
As indicated in the table beiow, the wastc rvater pool clcvatiorrs in Cells I ancl 3, asmeasured during the Quarter, tlid not exceed these regulatory stanclards:
"fable 6 - Summary of Waste lvater pool Elevations
Tailings
Cell
IVlaximurn
Wastewater Blevatiorr
Mcasured During the
Quarter (fmsl)
5,612.48
5,601 .61
Maximum t\'Itximunr
Wastewater
Elevation Pernrittecl
Under Part I.D.2 of
Wastewater Elevation
Permitted Under
License Condition
Cell I
Cell3
-__fL!=1(rmq}_ _ the permit_(!4q|_-__
5r6t& -- s,ors.s5,601.6 5,605.5
3.0 Monthly Slimes Drain Water. Level Monitoring
Pursuant to Part 1.F'2 of the croundwater Discharge Pcrmit ancl corespondencc from theUDEQ dated February 7,2a08, the results of monthly recovery monitoring of the slimesdrain for Cell 2 are to be recorded and included withihe result.s of quarterl"y monitodn inthe Quarterly Report' In aocordance with thesc rcquirements, the mlnthly ieadings and 3graph showing the initial reading anil the tinal reacling for each month are incluclecl asAtiachment B. These readings are to be collectecl cluring a 90 hour recovery period alterthe slirnes dmin purnp has been tumecl off in orcler to dltennine the static water level inthe drain (heacl) after this short cessation in purnping.
In Part I .8.6.b) of the Permit this requirement shall apply to Cell 3 only upon initiation oftailings de-watering operations. As Tailings Cell 3 is tunently an active iailings cell andde-watcring operations have not commenced, no such measurelnents will be macle in theslimes dmin access pipe for ceil 3 in the foreseeable future.
4.0 weekly lvastewater Lever tvlonitoring: Roberts ponct
Mlill personnel monitored and recorded weekly. commencing r>n March g, 2005, theeffective date of the Permit, thc wastewater levels at Roberts pond to clcterminecompliance with the DIvtT operations standarcls in Part I,D.3. of the pe.nit. part I.D.3 ofthe Perrnit p[ovides that the water level in Robert's Pond shall not exceed an clcvation ol.5,614'02 [msl, The r-esults of such monitoring, reportecl as feet above rncan sea levcl(finsl), are inc.ludecl in Attachment A.
The rnaximum wastewater elevation measurecl in Robert's Poncl cluring the quarter of5,620.84 finsl did not exceecl the maximum pennitted elevation of s,62+.0 fmsl.
5.0 Weekly Feedstock Storage ..\rea Insllection
Weekly feeclstock storage area inspections were perfonnecl by the l{adiation SafbtyDepaftment, cotnmencing on March 8, 2005, the effective clate ol the permit, to conf-innthat the bulk t-eedstock materials arc stored ancl maintainecl witlrin the definccl arcadescribed in the Pcrmit and that all alternate tbedstock locatetl outsicle the definedfeedstock area are maintainecl within watcr tight containers. The results of theseinspcctions ate recotded on tlte Weekly Ivlill InspJction Forms, rvhich are available at the
By:
Mill {br inspection. No Variance in storcd materials fl'orn this requirement or lcaking
alternate feedstock drums or other alternate t'eedstock containers were obseryed dtrring
tlrc inspection.
6.0 SICNATIJRE AND CERTIFICA'I'ION
This clocument was preparod by Denison Mines (USr\) Corp. on August 29, 2008.
DENISO N4I s (IJSA) COltP.
David C.und
Vice Presi Regulatory Affairs and Corursel
Certification:
I certify, untler penalty of law, that this document and all attachments were
prepared undei my direction or supeil/ision in accordance with a system designed to
iorur" that qualifiecl personnel properly gather and evaluate the infbrmation submitted.
Based on my inquiry of tl"rc person or persons who manage the system, or those pel'solls
clirectly r*rpon.ibl" for gathering the infomration, the intbrrnation submitted is, to thc
best of my knowleclge and belief, true, accut'ttte, and complete, I am awarc that there are
signiticant penalties fbr subrnittiug thlse intbmration, inch,rcling the possibility of {ine and
for knowing violations.
Dafld C. F'r'Vdcnlund
Vice llresident, Regulatory i\t'tbirs and Counsel
Denison Mines (uSA) CorP.
Attachment A
Tailings Pond Elevations
Znd Quarter Elevations
Date
Free [:]oard
4-Apr-08
11-APr-08
18-Apr-08
25-APr-08
5-MaY-08
9-MaY-08
16-MaY-0B
23-MaY-08
30-MaY-08
6-Jun-08
1 3-Jun-08
20-Jun-08
27-Jun-08
Cell 1
5615.40
5612.21
5612.16
5612.18
5612.07
5612.15
5612.10
5612.01
56:12.24
5612.0?
5612.48
5612.44
5612.46
5il2.44
Cell 3
r;601.60
5601.16
5601.35
56A1.27
5600.95
5600.76
5601.17
5601.09
5601.47
5601.35
5601.13
5601.47
5601.61
5601.51
Roberts Pond
5624.00
5618.25
5618.72
5618.76
5618.54
5619.45
5620.01
s620.68
5620.84
5619.52
Dry
5617.78
5617.59
5614.94
Attachrnent B
Locatfon
Wil A NT Fil LV #{EA D TUilE'A $ UMEfi 6EN'T TE-$ T'
Sfimes Ce[l # 2
Date
$ampler
et)e!-
0700#
0800
0900#
1000_r+
1100
1200
1300
1400
'!'2(
e,q.7s
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White Mesa Uranium MiIt
DMT Performance standard Monitoring Report
State of Utah
Groundwater Discharge permit No. UGW3 7OOO4I't euarter
(January through March)
2008
Prepared By:
Denison Mines (USA) Corp.
1050 lTth St.
Denver, CO. 80265
May 29,2008
DMT PERFORMAI\CE STAI\DARD MONITORING
1.0 Measurements Taken During the euarter
During the Quarter, the following DMT Monitoring was performed or addressed, asrequired under part I.E.6 of the permit:
-Weekly tailings wastewater pool elevations for tailings Cells I and 3;-Weekly slimes drain water levels;
-weekly wastewater level measurements in Robert,s pond; and-Weekly feedstock storage area inspections.
2'0 weekly Tailings waste water poor Elevation Monitoring
Mill personnel monitored and recorded weekly the elevation of wastewater in Tailingscells I and 3 to ensure compliance with the maximum wastewater elevation criteriamandated by Condition 10.3 of the Mill's Radioactive Materials License. Thesemeasurements were made from an elevation survey. The results of such monitoring,reported as feet above mean sea level (fmsl), are includeJin attachment A.
condition 10'3 of the Mill's Radioactive Materials License provides that freeboard limitsfor cells I and 3 shall be set in accordance with pro.LJ,r1". that have been approved bythe U.s. Nuclear Regulatory commission. Under those procedures:
(i) The freeboard limits are set as per !h1January 10, 1990 Drainage Report for cellI at a liquid maximum elevation of 5,615.4 frnsl; and
(ii) The freeboard limit for cell 3 is determined annually using a formula set out inthe procedure. The current freeboard limit for c.ii : was calculated under thisprocedure at 5,601.6 fmsl.
In addition, Part I'D.2 of the Permit provides that under no circumstances shall thefreeboard of any tailings cell be less than three feet, u. -"urur.d from the top of theflexible membrane liner ("FML"). The top of the FML in Cell 1 is at 5,61g.5 frnsl andthe top of the FML in cell 3 is at 5,6b8.5 fmsl. This means that the maximumwastewater pool elevations in cells 1 and 3 permitted under partr.D.2 of the permit are5,615.5 and 5,605.5 fmsl, respectively.
A table indicating the results of weekly measurements at cells I and 3, as well as theRoberts Pond is included in Attachm"ri R to this report. A review of these data, and asindicated in the table below, indicates that the waste'wat'er pool elevations in cells I and3, as measured during the euarter, did not exceed these regulatory standards:
Table 6 - Summary of Waste Water pool Elevations
Tailings
Cell
Maximum
Wastewater Elevation
Measured During the
Quarter (fmst)
Wastewater Elevation
Permitted Under
License Condition
Maximum
Wastewater
Elevation Permitted
Under Part I.D.2 of
Maximum
Cell 1
Cell3
5,612.95
5,601.43
5,614.4
5,601.6
10.3 (fms the Permit (fms
5,615.5
5,605.5
3.0 Monthly Slimes Drain Water Level Monitoring
Pursuant to Part I'F.2 of the Groundwlter Discharge permit and correspondence fromUDEQ dated February 7,2008, the results of monthiy recovery monitoring of the slimesdrain for cell2 are to be recorded and included with tire resutts of quarterly monitoring inthe Quarterly Report. In accordance with th_ese requirements, the monthly readings and agaph showing the initial reading and the nna reaJing for each month are included asAttachment B' These readings u.. to be collecteg ;rdt " 90 hour recovery period afterthe slimes drain pump has been turned off in order to JEt..-in" the static water level inthe drain (head) after this short cessation in pr-pirg. -
During the 2007 calendar yearDenison worked with the Division to resolve p"-ping'u"d recovery issues. As such, therecordings from lllch through November, -2007
"Ith". did not allow sufficient timebetween initial and final reading or pumping operations were inconsistent. Time betweenpumping and recovery remained less tt a, qo hours for the months of January andFebruary but the 90 hour recovery period was attained for the March measurement.Sampling personnel have been upp"r?d of-the "...rriiy to attain the 90 hour recoverygoal' In addition, UDEQ has requested an elevation survey for the measuring point at theslimes drain. This survey has been schearr"a ro, ilay 30-31,200g and will betransmitted to the UDEe no later than June l, 200g.
In Part I'E'6'b) of the Permit provides that this requirement shall apply to cell 3 onlyupon initiation of tailings de-watering operations. As Tailings celi':'is currently anactive tailings cell and de-watering operations have not commenced, no suchmeasurements will be made in the slimes drain access pipe for Cell 3 in the foreseeablefuture.
4.0 Weekly Wastewater Level Monitoring: Roberts pond
Mill personnel monitored and recorded weekly, commencing on March g, 2005, theeffective date of the Permit, the wastewater levels at Roberts pond to determinecompliance with the DMT operations standards in Part I.D.3. of the permit. part I.D.3 of
lhePermit provides that the water level in Robert's pond shall not exceed an elevation of5'624 fmsl' The results of such monitoring, reported u. r""t above mean sea level (frnsl),are included in Attachment A.
The maximum wastewater elevation measured in Robert's pond during the quarter of5'619.86 fmsl did not exceed the maximum permitted erevatio n of 5,624.0 fmsl.
5.0 Weekly Feedstock Storage Area Inspection
weekly feedstock storage area inspe.lrgry were performed by the Radiation SafetyDepartment, commencing on March 8, 2005, the effective date oithe permit, io confirmthat the bulk feedstock materials are stored and maintained within the defined areadescribed in the Permit and that all alternate feedstock located outside the definedfeedstock area are maintained within water tight containers. The results of theseinspections are recorded on the weekly Mill InspJction rorms, which are available at theMill for inspection. No variance in stored maierials from this requiremeni or leakingalternate feedstock drums or other alternate feedstock containers were observed duringthe inspections.
Attachment A
Locatlon
MANTHLY T{EAD MEASUREMENT TEST
Date
SamplerSllrnes Gett # 2
k
0700
0800
-
0900
1000
-
1100
-
120Ak
1300
-
1,O0
1500E
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Locatlon Date
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Locatlon
MONTF,ILY HEAD MEASUNEMENF TEST
Date
Sampler
3, 17-l?:@
P'l*^, P,+lt ,r ,-
0800k
0900
-
1000
1100
-
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Tailings Pond Elevations
1st Quarter Elevations
Date
Free Board
4-Jan-08
10-Jan-08
18-Jan-08
24-Jan-08
31-Jan-08
8-Feb-08
15-Feb-08
21-Feb-08
29-Feb-08
6-Mar-08
14-Mar-08
21-Mar-08
28-Mar-08
Cell 1
5615.40
Gell 3
5601.60
Roberts Pond
5624.00
5620.78
5620.73
5621.16
5621.52
s621.03
5617.4
5617.61
5617.75
5618.86
5617.5
5617.5
5617.79
5618.03
5611.47 5601.135611.69 560.1.285611.67 5601.535611.75 5601.65612.12 5601.595612.85 5601.245612.47 5600.755612.55 5600.875612.73 5601.65612.53 5601.355612.54 5601.25612.47 5600.835612.21 5601.27
Attachment B
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White Mesa Uranium MilI
DMT Performance standard Monitoring Rep&rt
\i:
State of Utah
Groundwater Discharge permit No. UGW3 70004
4th quarter
(October through December)
2007
prepared By:
Denison Mines (VSA) Corp.
1050 I 7,n St.
Denver, CO.90265
,"it,|.,.,-)-\ o\'-.1", \/(i{" .o-\ (v",
t1r 'r..:r
s.i. !.
February,2008
DMT PERFORMANCE STANDARD MONITORING
1.0 Measurements Taken During the euarter
,:;;ix:rtffrgTffilT"?li:T'ffilr{T Monitoring was perrormed or addressed, as
-weekly tailings wastewater pool elevations for tailings cells 1 and 3;_Weekly 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 Tailingscells I and 3 to ensure compliance with the -u*i,,r* wastewater elevation criteriamandated by condition l0'3 of the Mill's naaioaciive Materials License. Thesemeasurements were made from an e]3vajion .r-"v. -irre
results "f ;;h'monitoring,reported as feet above mean sea rever (fmsl), "* i;"il;"d in Attachment A.
condition 10'3 of the Mill's Radioactive Materials License provides that freeboard limitsfor cells I and 3 shall be set in u""oiau,r." **r, p-""i*". thut t uu" u."., upproved bythe U's' Nucrear Regulatory co--i..io". u;;; i;lJJ|ro..ar."r,
(i) The freeboard limits are set as per th-e January r 0, 1990 Drainage Report for cell1 at a liquid maximum elevation of S,O1S.+ fii.f, "a(ii) The freeboard limit for cell 3 is- determined annuaily using a formula set out inthe procedure' The current freeboard ri-ii r"r cJi3 was calculated under thisprocedure at 5,60L 6 frnsl.
In addition' Part I'D'2 of the Permit provides that under no circumstances shall thefreeboard of any tailings cell be il;"thu, ,hr";;",,;measured from the top of theflexible membranelingicFlrar'1.--itre top of the Fvtr in cell I is at 5,61g.5 fmsr andthe top of the FML in cell 3'i. li s,obg.s rmsr.
--rrris
means that the maximumwastewater pool elevations in cells I and 3 permitted ,r;; part r.D.2of the permit are5,615.5 and 5,605.5 frnsl, respectively.
A table indicating the results of weekly measurements at cells I and 3, as well as theRoberts pond is included as ettachmeni A to this d;.-l review of these data, and asindicated in the table below, indicates Lat the;;J#;;;.loor elevations in ce,s I and3, as measured during the Quarter, aia not exceed these regulatory standards:
Table 6 - Surnmary of Waste Water pool Elevations
Tailings
CelI
Maximum Maximum
r.rt.4 OI
,flcerr 3 s.601.43 :,9:1.1 s,orft
ffij:},#T,T:.#:,*,: :Iffiiy.,llr Erevation #;X,Ht.
Y-::::*9"During the p;i;;;;"T:;
Quarter (fmsl)License Condition
,oul.43 5,607.6
Elevation permitted
Under Part I.D.2 of
5,605.5
3.0 Monthly Slimes Drain Water Level Monitoring
Pursuant to Part I'F'2 of the Groundy?1", Discharge permit and correspondence fromUDEQ dated Febru ary 7' zoos' ir'" rgylls "r*on*riv recovery monitoring of the slimesdrain for Cell2 are to be i""*a"J und ,,.il;i.,,irir',il" *rrt. orqra.tJy'monitoring inthe euarterrv Report. In accordanJl yl1n ,rT.; r;;;;ents, the monthly readings and, agaph showing the initial ."uairelrd the final d;;; for each *or,rn,u." included asAttachment B' These r""di;;r';;L u" ""ii""r";fi;'j* a 90 hour recovery period afterthe slimes drain pump has beL tumed off il;;d"r;'ietermine the static water rever inthe drain (head) aftei ,rir ;il;*,:, *rr,,o#rl ,*i, s the z.,icarendar yearDenison has worked with the Jffi:" to resoive pu*iing.11d recovery issues. As such,the recordings from Marctr iloui Nor"mbJr';;i# did not allow sufficient timebetween initiar and finar r;;;]r;";r;.rmping
"p"*,i"n, *ere inconsistent.In Part I'E'6'b) of the Permit Provides that this reguireme.r.r.t shall appry to celr 3 onlyupon initiation of tailings A"_*-ui"rirg operations. As Taifirg, CJii,i._"ro"nt ly anffjl::,"H:il:ili,J" f**fl[tll operations rrave not commenced, no suchfuture. ---- ttlLt uu ,r.(r' m tne sllmes drain access pipe for celr i il; foreseeable
4'0 weekly wastewater Level Monitoring: Roberts pond
Mill personner monitored and recorded weekly, commencing on March g, 2005, theeffective date of 't'" ptt-iil iil"iuu"*ater- ievers
-u,
-nou"ns pond to' determinecompliance with the pMT op"*i."r'standards i.p.;i;3.-of the permit. part I.D.3 ofthe Permit provides that the *.r*1"""r i, R;;;;.'*"ralrar not exceed an elevation of;;:?Ltri:; IT,1::ffi;1x';;ii'lo'i,*, ."p;;;;;* above mean sea rever (rmsr),
The maximum wastewater erevation measured in Robert.l ron! during the quarter of5'619.86 fmsr did not exceed tt. -u*i-.rrn permitted elevafion of 5,624.0 fmsr.
5.0 Weekly Feedstock Storage Area Inspection
Weekly feedstock ro"pu.t r"ni-;";;rtt3*e area inspections were performed by the Radiation safety)ncmg on March 9,2005, the etfectiv" aut" of the permit, to confirm
that the bulk feedstock materials are stored and maintained within the defined areadescribed in the Permit and that all alternat, r""a*to"k located outside the definedfeedstock atea ate maintained withi, yll". tight containers. The results of theseinspections are recorded on the w""kl; Mir Insplction"eor-r, which are available at theMill for inspection' No variance in storea maierials ao- ,r,i, ,"qrir*"rrt or leaking
#:"il3;:"fffttotu drums or other atternate feedstock ,ortrir,".. *o. ob...ued during
Attachment A
Date CeIl I Coll 1 Roberts PondLU/U4/07 5610.90
t0/12/07 )ouu.oz 5617.975610 e1 5600.48t0/19/07 5617 7R)oIU.6d 5600.50
5600.s1
5617.74t0/26/07 561 n 7<
t1t1t07 5617 77
5600.53tt/8t07 5617 5A
5600.s4t1/16/07 56t7.76s610.70 5600.s7tt/21t07 5617 71)olu./u 5600.61
s600.64tt/30/07 5610.71 )ot t.'t2
t2/7t07 5617.725610.82 5601.3212/12/07 5618.34561 1.1 8 560t.43t2/21/07 5615 11
5599.7912/28/07 5619 47)or I.44 5601.09 )619.40
Attachment B
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Gl ountlw:rrr:r Itonitoring procedure
tfr ,tG mn{s sl,,^.s ?r, a
ATT..ICHIIEr\T,!
FIELD DATA WORI$HEET T'OR GROUND WATER
Durdsampler
Name andinitials I
pH Buffer 4.0
Datc: +.1{).05 Rcvi.sion; I
Page 15 of' t7
Location (well name)
pH Buffer 7.0
Specific Condu*ance- _ uMHOS/cm Well
Depth to Water
Well Water Temperature (avg)_"
Casing Volume (V) 43"#fii=_!:;;i,pHof Water(avg)_
Time:
Time:
Temperature-_
----__
Time:
Time:
un
=lI.-lTemperafure_ %
% Temperature*H
Conductanc
-
oH
Ternperature._.-
Conductance H
oH
$;;,=*". (er in gprn.Time to evacuate twoT _ )vtt\ _ casing volumes (2V)T =ZYIQ=
Ilill (ir,)ull(lw.rte r t)iscfiarilr: pcrnrit
(;ft )rlldw,ltL'1. Iturritur.ing prlcr:d ure
t).rtc'; t.lt).115 Itc'r.;r.n: I
['agc l(r rrf'l 7
Tyoe of Sample Sample
Taken
(qlrclc)
sa{ntrF,Yolume
(indlcate if gther
than as soeciffed
tielow)
Fittetgg!
(clr,cle)Preservafive .{dde
VOCs YN YNNutrientsYN flULYNYNll'eavv Metals YN tl:Ii{J.r Y NYNHNOr T N-All Other Non_
Radiologics
YN /,.JU mI YN No heservative AdGd
QrossAlpha YN l-0{10 mt YNUtn6f (snecifi,r)YN lIrUUa Y lrlnampre vOIUme N
If a preservative is used,
Specify Type and
Quantity of pfeservative:
100 -rt8
8o.Q_ -#ffi#ro0 #,
ffi' ffitr-9q on
,?o, sl Jfffilr
"16*g
ITJC
Jl"a
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lqfis ,.
11^57 --
11 ,65
100 -.
qCIo
*\Lt.*fi t3tf .l(,
ATT.{cHilrsNTJ
FIELD DAT^d WORI$HEET T'OR GROI.IND WATEN
rocation (*urr no,ru)S[,yrre Cell f, ffir#Xlli,r,
pH Buffer 7.0
pH Buffer4.0
Speci fi c Conductance_*_uMHOS/cm
Depth to lVater_
Well
,!lill - Clnuntlwatc,r Dischirge pcrnlitCroundrvrrtcr }tonitoring procedurc
Well Water Temperature (avg)__
Drrre: 4.19.05 Rcvi.sion: I
Casing Volume (V) 4,,Well .653h)
Page 15 of l7
3" Welt:367h)
Time:
Time:
Conductance% ConductancenH%------
,"r***, ', T PH-----
Ternperature
''-''_-.t , .
Time:
Time;conductance,.rconductance*
pH- -
DH
Temperature . ,
'
-
Temperature
Rrmpine Rate CalculatjgE
$;Ij". (e), in gpm.
;'$;d"jcuate two casing votumes (zv)
ao
Ilill (;rrlull(lw.ltdt. [)ischatllc pcrnrir
(irt.rulrtJw,rtcr Ilurriruring pliCcilure D.1le; .f ,1t1.1,15 Rq.r.j,ir(rn; I
f';rgu l0 ot' l 7
Tvop of S.4,mele Samole
Taken
(clrcle)
I Samde Vqiume
(Indlcatp if other
than as soccifled
tielowl
Filtered
(clrcle)Pres,ervafive .ldd.d
VOCs YN 3x40 ml YNYNNutrientsYNl00ml rALL YN
tpavy Merals YN 250 rnl YN HAll other Nin-
Radiologils YN 250 ml YN
YT
rut\4 I N
No Boservative Added
Gp s Alpha YN I rnn *t
Other (specify)YN H!SO4 .fl
lJ4rrrpts volume YN
If a preservative is used,
Specify Tlpe and
Quantity of preservative:
Ip.o. ,i?"qgw 41s3.g0- Q(n,gg
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L{to- F,$,4]
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Page l5 ol I7
Time:
Time:
Conductance
ConductancepH-
oHTemperature '
H Temperature %
Time;
Time:
_ Conductance_
o:i_
oHfemperature '?emperature_ %
H TemperaturePtrtnpingBarecarcuratigg %
fl;f=*"" (e), in gpm.
ATT..|gHjtIENTJ
FTELD DATA WORI$HEET FOR GROUND WATER
Location (well name)
pH Buffer 7.0
Specific Condumance_ _uMHOS/cm
Depth to lVater
lVell Water Ternperature (avg) ...-
,r'$rt
d'=.cuate
two cusing vorumes (2v)
Ilill (;r,)utr(ln.lLdr- l.)i:ichirrllc pcrnrit
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f'rrgc l6 rrl'l 7
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Taken
fglrcle)
Samolg V.olume
(ln0lcate if other
th{n as soeqifled
belowl
['iltefe4
(clrcle)Pres$rvative .ldded(clrcle)
VOCs YN 3x40 ml YN -UCL v NNutrientsYNT(,t,mI YN lLlo.r r NHeavy Metals YN 250 ml YN -ull-o, V IAll Other Non-
Radiologics
YN 250 ml YN No Preservative Added
Gross Alpha YN 1,fr)0 ml rN H:SOrYN N
If a prescrvative is used,
Specify Type and
Quantity of Preservative:
Other (specify)YN Sarnple voturne YN
tdes/ol
1.1.5r,
13.55
13,55
t3.s{
l3,5rr_5
%
100
Ban
100.
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. l{.qg_.l{.e I
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,{3.16
13, 33
13.10
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-l?{,56.
J t5e-
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l'l,qL
ILI,LI,L.
, Fl. rl3
J',L,10
Locatlon
MONTHLY HEAD MEASUP EMENTTEST
Date
Sampler$lfmes Gcil 2
*{5 ,,,1!lt'tlo7
,ll.gl
fi.!?
il.D1
,,. r,)
/l,qrl
1300
--
a
-ffrrl
-.a
tt
-ItI
--l
-
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Comments
oO
Locatlan
M O NTII LY H EAD,T'EASURE'TIE'UT TEST
Date
$amplerSllmes GeIl # 2
^^t
0700
-
0800k
0900
-
1000k
1100
-
1200
-
1300
-r*1400
-
1500KE
Comments
l?.5nI
r1 t8
16.10
-
16.6o
16.3g
-
16. lg
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I&,.se B.Sg,
l,.ttal , [,3.53
ltt.t?. t3.4q
l 'l.l8 I 3. 1, I1!.q H.ts t3.3?sJhls slg,ls ,rltdtrz
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seJ"w 6&:n -6?1;sJ
18.38 lll.Ltl ll.6i
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w- 8 5 t2.11slplpt slt&t
Locatlon
MONTHLY HEAD
'TIEASUREMENT
TEST
Sfimes GeIl # 2
Date
$ampler
*&
0900
1000
1.t00
1200
la,L8
rp.?5
t2.\2
l?.trt
t26s
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fi.6er.
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t9.1t
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".,,,. C"tt,f4 s-i;r^us.Jte,.f,mp
1500
Comments
MONTHLY HEAD T'EASURE*'EIUT TEST
Locatlon Date f- // - Af
SllmeeGell #2 Sampler I?V ," (*' ntt .-,-
0800
0900
6afr
7,zl
1.2I
t.z t
??!
r/rr/*
1 100
1500
Comments
L n lr ,,, 'f.
tt - t3- h7
NfiONTHLY HEAD
'T'EASUREMENT
TEST
Date
Sampler
Locatlon
7Z\ !*l,nqtt .
Sllmee Gefi # 2
8'- lB-:-67
8,4[t,!(
x. yd.
g.Ltb
1100
1200
't500
MO NTHLY HEAD IT'EASUREMEflT TEST
Locatlon Date
Sampler
?- n -o?
Sllmes Gell * 2
62n7
1.5s
q,Sg
?.5S_
W,
1300
6t_ut
IO.po
9.8o
1,'lg
j.')5
3,13
9.1o
9.6 8
1,66
1100
1200
1500
Comments
MONTH LY H EAD M EASU RETIfrE'YT TEST
Locatlon Data
$ampler
la -21-0?
Sllmes Gell # 2 N* dlsen
1100
1200
1300
1500
f. se
?.36
xs6
rcb
MO NTH LY HEAD M EASU REME'UT TEST
LocaUon Date
Sarnpler
//- t4-o?
Sllares Gell # 2 4* C^t
lJ:J3-'6?
trtsq
?.q7
8,Lt?
t.{?
1100
1200
1500
ffiANTHLY HEAD MEA,$IIREMEIYT TEST
Locatlon Date
Sampler
t2- t7 -07
Sllmes GeIl # 2
0700
lz,t?
Lt.7!
n [.03
fl}l.bq
11.?n
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t'2.40
t7.+cl
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(,63
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4. [7-;-4.[3-'1_
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1200
1300
1400
1500
-
Comments
White Mesa Uranium Mitl
DMT Performance Standard Monitoring Report'
State of Utah
Groundwater Discharge Permit No. UGW370004
3d quarter
(July through September)
2007
Prepared By:
De,nison Mines (USA) Corp.
1050 17th St.
Denver, CO. 80265
December 5,2007
L:-,lr
DMT PERFORMAIICE STANDARD MONITORING
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 and 3;
-Weekly slimes drain water levels;
-Weekly wastewater level measurernents 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 and 3 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 (frnsl), are included in Attachment A.
Condition 10.3 of the Mill's Radioactive Materials License provides that freeboard limits
for Cells I and 3 shall be set in accordance with procedures that have been approved by
the U.S. Nuclear Regulatory Commission. Under those procedures:
(i) The freeboard limits are set as per the January 10, 1990 Drainage Report for Cell
I 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 calculated under this
procedure at 5,601.6 fmsl.
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 I and 3 permitted under Partl.D.z 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 6 - Summary of Waste Water pool Elevations
Tailings
CeIl
Maximum
Wastewater Elevation
Measured During the
Quarter (fmst)
Maximum
Wastewater Elevation
Permitted Under
License Condition
Maximum
Wastewater
Elevation Permitted
Under Part I.D.2 of
10.3 the Permit
Cell 1
Cell 3
5,612.51
5,600.71
5,61f,..4
5,601.6
5,615.5
5,605.5
3.0 Weekly Slimes Drain Water Level Monitoring
Upon approval of the DMT Monitoring Plan required by part I.H.l3 of the permit, Millpersonnel will monitor and record weekly the depth to wastewater in the slimes drain
access pipe at Tailings Cell2 to determine maximum and minimum fluid head before andafter a pumping cycle, respectively.
Quarter, but will be taken
Part I.E.6.b) of the Permit provides thaffiisrequirement shall apply to Cell 3 only upon initiation of tailings de-watering operations.
4.0 Weekly Wastewater Level Monitoring: Roberts pond
Mill personnel monitored and recorded weekly, commencing on March g, 2005, theeffective date of the Permit, the wastewater levels at Roberts pond to determinecompliance with the DMT operations standards in Part I.D.3. of the permit. part I.D.3 ofthe Permit provides that the water level in Robert's Pond shall not exceed an elevation of5,624 frnsl. The results of such monitoring, reported as feet above mean sea level (finsl),
are included in Attachment A.
The maximum wastewater elevation measured in Robert's Pond during the quarter of5,619.86 frnsl did not exceed the maximum permitted elevation of 5,624.0 fmsl.
5.0 Weekly Feedstock Storage Area Inspection
Weekly feedstock storage area inspections were performed by the Radiation SafetyDepartment, commencing on March 8, 2005, the effective date of th. permit, to confirmthat the bulk feedstock materials are stored and maintained within the defined areadescribed in the Permit and that all alternate feedstock located outside the definedfeedstock atea ate maintained within water tight containers. The results of theseinspections are recorded on the Weekly Mill Inspection Forms, which are available at theMill for inspection. No variance in stored materials from this requirement or leakingalternate feedstock drums or other alternate feedstock containers were observed durin!the inspections.
o\N
As Tailings Cell 3 is currently an active tailings cell and de-watering operati-ons have notcofirmenced, no such measurements will be made in the slimes drain access pipe for Cell3 in the foreseeable future.
of the DMT Monito
Attachment A
Date
03-Jul-07
12-Jul07
19-Jul-07
27-JulO7
01-Aug-07
07-Aug-07
16-Aug-07
23-Aug-07
31-Aug-07
07-Sep-07
12-Sep-07
20-Sep-07
28-Sep-07
Cell #1
5612.51
5612.35
5612.36
5612.16
5611.97
5611.44
5611.09
5610.96
5610.93
5610.84
5610.83
5603.74
5610.88
Cell #3
5598.88
5598.95
5598.88
5598.76
5598.99
5600.56
5600.71
5600.46
5600.10
5600.39
5600.30
5600.25
5600.51
Robert's Pond
5614.85
dry
dry
dry
dry
5617.54
dry
dry
dry
dry
5617.82
'i,r*, ?#y::':: QF'7.
, , PPL'7"carYc'( s*nf' zott/
(i) DIVIT PERFORMAI\CE STAI\DARD MONITORING
a. 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 I
-Weekly slimes drain water levels;
-Weekly wastewater level measurements in Robert's Pond; and
-Weekly feedstock storage area inspections.
b. Weekly Tailings Waste Water Pool Blevation Monitoring
Mill personnel monitored and recorded weekly the elevation of wastewater in Tailings
Cells 1 and 3 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 Tab J.
Condition 10.3 of the Mill's Radioactive Materials License provides that freeboard limits
for Cells I and 3 shall be set in accordance with procedures that have been approved by
the U.S. Nuclear Regulatory Commission. Under those procedures:
(i) The freeboard limits are 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 calculated under this
procedure at 5,601.6 fmsl.
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 Par:t 1.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:
20
Table 6 - Summary of Waste Water Pool Elevations
Tailings
Cell
Maximum
Wastewater EleVation
Measured During the
Quarter (fmsl)
Maximum Maximum
WastewaterElevation Wastewater
Permitted Under Elevation Permitted
License Condition Under Part I.D.2 of
10.3 (fmsl) the Permit (fmsl)
Cell I
Cell3
5,614.r2
5,600.66
5,614.4
5,601.6
5,615.5
5,605.5
c. Weekly Slimes Drain Water Level Monitoring
Upon approval of the DMT Monitoring Plan required by Part I.H.13 of the Permit, Mill
personnel will monitor and record weekly the depth to wastewater in the slimes drain
access pipe at Tailings Cell2 to determine maximum and minimum fluid head before and
after a pumping cycle, respectively. These measurements were not taken during the
, but will be taken u of the DMT Monitorins Plan. which is currentl
Part I.E.6.b) of the Permit provides that 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
corlmenced, no such measurements will be made in the slimes drain access pipe for Cell
3 in the foreseeable future.
d. 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 Pan I.D.3. of the Permit. Part I.D.3 of
the Permit provides that the water level in Robert's Pond shall not exceed an elevation of
5,624 fmsl. The results of such monitoring, reported as feet above mean sea level (fmsl),
are included in Tab J.
The maximum wastewater elevation measured in Robert's Pond during the quarter of
5,619.04 fmsl did not exceed the maximum permitted elevation of 5,624.0 fmsl.
e. Weekly f,'eedstock Storage Area Inspection
Weekly feedstock storage area inspections were performed by the Radiation Safety
Department, cofilmencing 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.
2l
I
DENEOJXJ
Denison Mines (USA) Corp.
1050 17th Street, Sulte 950
Denver, CO 80265
USA
Tel : [phone]
Fax : [phone]
wum.denlsonmlnes.com
aa.
MINES
December 7,2007
YIA FEDERAL EXPRESS
Mr. Dane L. Finerfrock
Executive Secretary
Utah Radiation Control Board
State of Utah Department of Environmental Quahty168 North 1950 West
salt Lake city, tIT 841144850
Re: Transmittal o! 3'd_Qq*ter 2007 Routine Groundwater Monitoring Report and RoutinePerformance Standard Monitoring Report For the White Mesa Uranium il{iI
Dear Mr. Finerfrock:
DMT
Enclosed are two copies each of the White Mesa Uranium Mill Groundwater Monitoring Report and separate
DMT Performance Standard Monitoring Report for the 3nd Quarter of 2007 , as required undir Parts I.F. I and 2
of State of Utah Groundwater Discharge Permit No. UGW370004.
Yours very kuly,
cc: Ron F. Hochstein
Harold Roberts
David Frydenlund
David Turk