DRC-2010-001907 - 0901a0688016ac27

State of Utah
GARY R. HERBERT
C;REU BELL
Lieuienanl Gin'cnuir
Department of
Environmental Quality
.•Amanda Smith
Execuiive Director
DIVISION OF RADIATION CONTROL
Dane L. Finerfrock
Direcior
TO:
FROM:
DATE:
SUBJECT:
MEMORANDUM
O //<5 /-"i
Loren Morton
Dean Henderson
January 7, 2010
Review of the 2"'^ Quaiter 2009 Chloroform Monitoring Report for the Chloroform
Contamination Investigation
Dennison Mines (USA) Corp. (hereafter "DUSA")
White Mesa Uranium Mill, near Blanding, Utah
On September 1, 2009 the Division of Radiation Control (hereafter "DRC") received 2"'' Quarter
2009 Chloroform Monitoring Report (hereafter "Report"). On December 21, 2009 DRC receive
the White Mesa Uranium Mill Supplemental Chloroform Monitoring Report Addendum (hereafter
"Addendum") from DUSA that included missing infonnation that was not included in the Report.
For the review of this Report and the Addendum, the following regulatory enforcement documents
will be used:
• DUSA was issued Ground Water Quality Discharge Permit No. UGW370004 (hereafter
"Pennit") on March 8, 2005; last revised on March 17, 2008.
• The DUSA Quality Assurance Plan (hereafter "QAP") was originally dated November 17,
2006, (Revision 1.0); and was approved by the DRC Executive Secretary on December 1,
2006. The DUSA QAP was last revised by DUSA on November 18, 2008 (Revision. 4.0)
and approved on March 30, 2009 by the Executive Secretary.
The review for the Repori will be: 1) summary of apparent violations, 2) edilorial corrections for
future chloroform monitoring reports, 3) summary of parameters exceeding groundwater quality
standards, 4) carbon tetrachloride and Methylene chlonde exceeding groundwater quahty
standards (hereafter "GWQS"), 5) elevated chloride concentrations and, 6) status and condition of
the chloroform plume.
168 North lySO WcM • .Sail L.kL- ( ily. IT
Mailint; Acklress: P.O.Box I448.i0 . .Salt Lake (ily. 1 IT 841 I4-4X.^50
Tck-phoiK-(HOI) 530-4250. Fax (SOli 5".^-4l)')7 .'l.O.D iHOl )5"6-4414
UMW.flc^q.iilall .i;n\
PriniL-d on 1(1(1'', K-mk-il |M(VI
State of Utah
GARY R. HERBERT
Govemor
GREG BELL
Lieutenant Governor
Department of
Environmental Quality
Amanda Smith
Executive Director
DIVISION OF RADIATION CONTROL
Dane L. Finerfrock
Direcior
MEMORANDUM
TO: Loren Morton
FROM: Dean Henderson
DATE: February 10, 2010
SUBJECT: Review of the 2"" Quarter 2009 Chloroform Monitoring Report for the Chloroform
Contamination Investigation
Dennison Mines (USA) Corp. (hereafter "DUSA")
White Mesa Uranium Mill, near Blanding, Utah
On September 1, 2009 the Division of Radiation Control (hereafter "DRC") received 2"^ Quarter
2009 Chloroform Monitoring Report (hereafter "Report"). On December 21, 2009 DRC receive
the White Mesa Uranium Mill Supplemental Chloroform Moniloring Report Addendum (hereafter
"Addendum") from DUSA that included missing information that was not included in the Report. .
For the review ofthis Report and the Addendum, the following regulatory enforcement documenls
will be used:
• DUSA was issued Ground Water Quality Discharge Permii No. UGW370004 (hereafter
"Pennit") on March 8, 2005; last revised on March 17, 2008.
• The DUSA Qualily Assurance Plan (hereafter "QAP") was originally dated November 17,
2006, (Revision I.O); and was approved by the DRC Executive Secretary on December 1,
2006. The DUSA QAP was last revised by DUSA on November 18, 2008 (Revision. 4.0)
and approved on March 30, 2009 by the Executive Secreiary.
The review for the Report will be: 1) summary of apparent violations, 2) editorial corrections for
future chloroform monitoring reports, 3) summary of parameters exceeding groundwater quality
standards, 4) carbon tetrachloride and Methylene chloride exceeding groundwaier qualily
siandards (hereafter "GWQS"), 5) elevated chloride concenlrations and, 6) status and condition of
the chlorofonn plume.
168 North 1950 West • Salt Lake City. UT
Mailing Address: P.O. Box 144850 • Salt Lake City, UT 84114-4850
Telephone [phone] • Fax [phone] • T.D.D. (801) 536^1414
www.deq.utah.gov
Prinled on 100% recycled paper
Page 2
SUMMARY OF APPARENT VIOLATIONS
1. Decontamination procedures reported did not follow decontamination procedures required
in Appendix A and seciion 6.2.5 of the QAP. Decontaminaiion procedures in Appendix A
item 1) state:
"Decontamination of All sampling equipment y^ill follow the decontamination procedure
outlined is section 6.2.5 ofthe QAP. "
Requirements in seciion 6.2.5 ofthe QAP are:
6.2.5 Decontamination Procedure
Ifa portable (non-dedicated) pump is to be used, prior to each sampling event, at the
beginning ofeach day during the sampling event, and between each sampling location
(well), decontaminate the portable (non-dedicated) sampling pump prior to its use for
purging or sampling using the following procedure:
"a) wash the pump probe, probe sheath and other pump equipment that may come in
contact with the sampling well inner casing or well water (the "Sampling Equipment")
with a nonphosphate detergent;
b) rinse the Sampling Equipment with de-ionized water;
c) rinse the Sampling Equipment with dilute (.IN) hydrochloric or nitric acid; and
d) rinse the Sampling Equipment with de-ionized water."
According lo part of section 2.2.1(b) of the Report: "Before leaving the Mill office, the
pump and hose are rinsed with de-ionized ("DI") water. Mill personnel then proceed to
thefirst well which is the well indicating the lowest concentration of chloroform based on
the previous quarters sampling results". Also, according to part of section 2.2.2(a) of the
Report: "The dedicated portable pump is appropriately decontaminated prior to each
purging event and a QA rinsate sample is collected after said decontamination but prior to
the commencement ofthe sampling event. " In this comment [2.2.2(a)] the Report did nol
reference the decontamination procedure in seciion 6.2.5 or Appendix A of the QAP.
Therefore it appears that there decontamination procedure was as described in seciion
2.2.1(b) ofthe Report.
This is a repeat violation of the same problem identified in the November 10, 2009 Notice
of Violation and Compliance Order, Docket No. UGW09-05 (hereafter "NOV"), Violation
No. 1. This NOV was for the 3"* and 4'" quarter 2008 and 1'' quarter 2009 chloroform
monitoring reports. On December 14, 2009 DUSA responded on how lhey would resolve
the violations listed in the NOV. Since this review occurred after the NOV was issued and
the 2"'' quarter 2009 sampling had occurred in June 2009 DUSA did not have time lo
resolve all violations listed in the NOV. Therefore, DRC slaff feels it is reasonable to
eccept DUSA response to resolve violation 1 ofthe NOV for this repeat violation, which
is:
"a) Root Cause of the Noncompliance
The root cause of the noncompliance was a failure to fully understand the
decontamination process outlined in the QAP as it relates to chloroform sampling with
non-dedicated pumping equipment. The sampling technicians and QA Manager
Page 3
believed that the process outlined in Section 1) of the Chloroform Investigation
Monitoring Quality Assurance Program (Appendix A to the QAP), whereby samples
are collected in sequential order from the least affected lo most affected well, allowed
for decontaminaiion prior lo the sampling evenl bul did not require deconlamination
belween individual sampling locations. As this was the past practice for many years
and because the sequential sampling was still described in the QAP, the technicians
and QA Manager failed lo understand that the reference to Seciion 6.2.5 of the QAP
required decontamination between individual sampling locations, in addition to
decontamination prior lo the sampling evenl.
b) Steps That Have Been Taken to Correct the Violation
The QA Manager and sampling technicians have reviewed the matter and the QAP
language and now are fully aware that the reference to Section 6.2.5 of the QAP at
Section 1) of the Chloroform Investigation Moniloring Quality Assurance Program
applies not only to decontamination prior to chloroform sampling events bul between
sampling locations as well.
c) Date When Compliance Was or Will be Regained
Samples collected for the 4"^ Quarter, 2009 will be collected with the appropriate
understanding of the QAP, and in accordance with Seciion 6.2.5. Equipment
decontaminaiion will occur prior to the sampling event and between individual sample
locations.
d) Sleps Taken to Prevenl Reoccurrence of the Noncompliance
i. The steps outlined in I .b) above have been taken.
ii. DUSA is evaluating the installation of dedicated pumping equipment for all
chloroform monitoring wells."
Contrary lo Seciion 6.2.7(d)(v) oflhe DUSA QAP, DUSA failed to make and record
multiple field measurements lo demonstrate parameter stability (+/- 10%) before water
quality sample collection in 21 monitoring wells for the 2"'' quarter 2009 chloroform
monitoring evenl. While the approved field worksheet included space for four (4)
individual field parameter measurements, in one case (TW4-14) none were recorded and in
all others only one (I) measurement was recorded. These wells along with the reported
purge volume at the time field parameters where measured are summarized in the table
below.
Well
TW4-I
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
Volume Purged (gallons)
60
66
66
66
84
36
66
Volume When Field
Parameters Where Measured
(gallons)
48
54
36
54
72
24
54
Page 4
TW4-8
TW4-9
TW4-I0
TW4-11
TW4-I2
TW4-I3
TW4-14
TW4-I6
TW4-I8
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
76
87
84
48
82
72
Not Purged
99
72
84
78
72
84
126
60
60
72
36
66
60
96
60
60
60
60
72
90
Section 6.2.7(d)(v) of the QAP requires in part that:
"Take measurements of field parameters (pH, specific conductance, temperature, redox
potential and turbidity) during well purging, using the Field Parameter Meter and
turbidity measuring instrument. These measurements will be recorded on the Field Data
Worksheet. Purging is completed after two casing volumes have been removed and the
field parameters pH, temperature, specific conductance, redox potential (Eh) and turbidity
have stabilized to within 10% over at least two consecutive measurements."
In the second paragraph in the first page of Appendix A of the QAP it slates:
"Specifically, the mill will use the same sampling regimen for the Chloroform
Investigation that is utilized for groundwater sampling under its groundwater discharge
permit, as set forth in the attached groundwater discharge permit Quality Assurance Plan
(QAP), except as set forth below:" subsequent language in Appendix A has no exceptions
lo the well purging requirements outlined in section 6.2.7(d)(v) of the QAP.
According to DUSA field data work sheets (found under Tab B) of the Report, with the
exception of TW4-14, although 2 casing volumes of water were purged from each well,
only one sel of field parameter measurements were measured and recorded. The field
parameters were measured prior to completion of purging the required two casing volumes
(see Table 4 for the inspection form in Attachmenl 1). Therefore, because DUSA only
made one sel of measurements or in the case of TW4-i4 no measurements, they are unable
lo demonstrate that the field parameters stabilized lo within 10% over at least two
consecutive measurements.
This is a repeat violation ofthe same problem identified in the November 10, 2009 NOV,
Violation No. 3. This NOV was for the 3"^ and 4"" quarter 2008 and l" quarter 2009
chloroform monitoring reports. On December 14, 2009 DUSA responded on how they
would resolve the violations listed in the NOV. Since this review occurred after the NOV
was issued and the 2"'' quarter 2009 sampling had occurred in June 2009 DUSA did nol
have lime lo resolve all violations lisied in the NOV. Therefore, DRC staff feels it is
Page 5
reasonable to accept DUSA response to resolve violation 3 of the NOV for this repeat
violation, which is:
"a) Root Cause of the Noncompliance
The sampling technicians failed to fully understand the QAP requirement al Section
6.2.7.(d)(v) of the QAP. The technicians incorrectly believed that if the well yields 2
casing volumes (Section 6.2.7.(d)(vi) ofthe QAP) or if stable parameters are obtained
in accordance with Section 6.2.7.(d)(v) then a sample can be collected. The technicians
did nol understand that regardless of the fact that 2 casing volumes have been
evacuated, Seciion 6.2.7.(d)(v) requires that field parameters must fall wilhin 10%
prior to the collection of samples. As a result, the technicians evacuated 2 casing
volumes and only recorded one set of field parameters.
b) Sleps That Have Been Taken lo Conect the Violation
The following sleps have been taken lo conect the violation:
i. Sample technicians have been re-apprised of the requirements at Sections
.2.7.(d)(v) and 6.2.7.(d)(vi) ofthe QAP and advised as to the duel requiremenl that
2 casing volumes must be evacuated and that stable field parameters musl be
observed prior to sampling.
ii. The QA Manager has initiated an early review process for field data worksheets
relative lo well evacuation volumes and field parameters. This review step will
occur as soon as possible after sampling has occuned, and in time for re-sampling
should purging steps fail to comply with QAP requirements.
iii. As an elemeni of quarterly reporting, the QA Manager has initiated a documented
review of quarterly samples for evacuation volume and field parameter stability,
which has been included in the 3 Quarter, 2009 Chloroform Moniloring Report,
iv. All technicians are required to read the QAP at least annually and as necessary in
order lo follow the QAP requiremenls.
c) Date When Compliance Was or Will be Regained
Samples will be collected in accordance wilh Sections 6.2.7.(d)(v) and 6.2.7.(d)(vi) of
the QAP during the 4"' Quarter, 2009 evenl.
d) Steps Taken to Prevenl Reoccunence oflhe Noncompliance
The steps described under 3.b) above have been taken."
3. In the 2"'* quarter 2009 sampling event monitoring well TW4-14 did not follow purge
procedures as required in section 6.2.7(e) of the QAP. Section 6.2.7(e) requires:
"e) Purging, Where Use of Pump is Not Effective
For wells where a pump is not effective for purging and/or sampling (wells with
shallow water columns, i.e. where the water column is less than five feet above the
bottom ofthe well casing or the wells over two days to recover from purging), a
disposable bailer, made of inert materials, may be used. Ifa bailer is used, the
following procedure will be followed:
Page 6
(/) Use the sound level instrument to determine the water column and figure the
amount of water that must be evacuated;
(ii) Attach a 3" disposable bailer to a rope and reel;
(iii)Lower the bailer into the well and listen for contact with the solution. Once
contact is made, allow the bailer to gradually sink in the well, being careful not to
allow the bailer to come in contact with the bottom sediment;
(iv) After the bailer is full, retrieve the bailer and discharge the water from the bailer
into 5 gallon buckets. By doing this, on can record the number of gallons purged;
(v) After the bailer is emptied, lower the bailer back into the well and gain another
sample as before. This process will continue until the two casing volumes have
been collected of until no more water can be retrieved. When the process is
finished for the well, the bailer will be disposed of; and
(vi) Take field measurements referred to in paragraph 6.2.7(v) above from the water in
the buckets;"
In the second paragraph in the first page of Appendix A of the QAP it states:
"Specifically, the mill will use the same sampling regimen for the Chloroform
Investigation that is utilized for groundwater sampling under its groundwater discharge
permit, as set forth in the attached groundwater discharge permit Quality Assurance Plan
(QAP), except as set forth below:" subsequent language in Appendix A has no exceptions
lo the well purging requiremenls outlined in seciion 6.2.7(e) ofthe QAP.
According to the comments recorded in field data work sheet for TW4-I4 (found in under
Tab B of the Report), for sampling done on September 8, 2009 it appears purging was
attempted bul a field note slates, "No purge - not enough water - doesn't recharge ". No
additional explanation for not purging this well was written in the Report. According to
the water level measurement below land surface (hereafter "bis) for TW4-I4 recorded
under Tab G in the Report, groundwater on this date was measured at 87.59 feet bis. And
according lo the well complelion delails for TW4-14 the well depth is 92.5 feel bis (HGC
2002). Therefore, there was approximately 4.9 feet of water in the well column which
qualifies TW4-14 to follow the purging procedures out lined in section 6.2.7(e) ofthe
QAP.
This is a repeat violation of the same problem idenlified in the November 10, 2009 NOV,
Violation No. 2. This NOV was for the 3''' and 4'^ quarter 2008 and 1'' quarter 2009
chloroform monitoring reports. On December 14, 2009 DUSA responded on how they
would resolve the violations listed in the NOV. Since this review occurred after the NOV
was issued and the 2"^* quarter 2009 sampling had occuned in June 2009 DUSA did not
have time to resolve all violations listed in the NOV. Therefore, DRC staff feels il is
reasonable to accept DUSA response lo resolve violation 2 of the NOV for this repeal
violation which is:
"a) Root Cause of the Noncompliance
Well TW4-I4 produces very lillie waler and has been difficult lo sample as a result.
Due to the difficulty in obtaining samples (and evacuating 2 casing volumes) the
sampling technicians believed that obiaining a sample without evacuating two casing
volumes was acceptable given that waler evacuation and recovery in this well has been
Page 7
difficult al best. While this well may be difficult to obtain a sample from, the QAP
accommodates such situations al Section 6.2.7.d)(vii) whereby the well must be
evacuated to dryness, the number of gallons evacuated musl be recorded, and prior lo
sampling (but after evacuation) the depth lo groundwater must be recorded on the field
data worksheet. The sampling technicians failed to recognize these requiremenls for
wells with poor recovery and failed to conduct any purging and to record the
informaiion required by Section 6.2.7.d)(vii) ofthe QAP. The root cause was failure lo
recognize the requirements of Seciion 6.2.7.d)(vii) of the QAP.
b) Steps That Have Been Taken lo Conect the Violation
The following steps have been taken to conect the violation:
i. Sampling technicians have been re-apprised of the requiremenls of Section
6.2.7.d)(vii)oftheQAP.
ii. All technicians are required to read the QAP al least annually and as necessary in
order to follow the QAP requiremenls.
c) Date When Compliance Was or Will be Regained
Well TW4-14 will be sampled in accordance with Section 6.2.7.d)(vii) of the QAP for
the 4"^ Quarter, 2009 Chloroform sampling evenl.
d) Steps Taken lo Prevent Reoccurrence of the Noncompliance
The steps described under item 2.b) above have been taken."
4. Part of section 6(c) of Appendix A (first bullet in item 3) requires: "3) depth to
groundwater measured and groundwater elevation from each monitor well summarized in
a data table, that includes historic groundwater level data for each well, "
The Report did not provide historic groundwater level data for wells TW4-23, TW4-24,
and TW4-25. However, this missing water level dala was provided in Tab G of the
Addendum. In addition, DRC staff feels it is reasonable to accept DUSA response to
resolve violation 7 of the NOV for this repeat violation, which is:
"a) Root Cause of the Noncompliance
The QA Manager inadvertently over looked this requiremenl.
b) Steps That Have Been Taken to Conect the Violation
In order to address this violation, DUSA is preparing Addenda that will include
hydrographs and elevation tables for the 3"* Quarter 2008 Report, 4'^ Quarter 2008
Report, and l" Quarter 2009 Report.
c) Date When Compliance Was or Will be Regained
The Addenda will be submitted to the Executive Secretary on or before December 18,
2009.
d) Steps Taken lo Prevenl Reoccunence ofthe Noncompliance
The steps described under 7.b) above have been taken."
Page 8
5. Part of seciion 6(c) of Appendix A (item 1 second bullet) requires the quarterly chloroform
report lo include: "a current isoconcentration map with one ofthe isoconcentration lines
showing the 70 pg/L boundary. "
Contrary lo this requirement, DUSA failed to include in the Report a cunent chloroform
isoconcentration map with a 70 pg/L boundary, and instead provided an 80 pg/L
isoconcentration boundary. However, a cunent isoconcentration map wilh one of the
isoconcentration lines showing the 70 pg/L boundary was included in Tab J of the
Addendum. In addition, DRC staff feels it is reasonable lo accept DUSA response lo
resolve violation 9 of the NOV for this repeat violation, which is:
"a) Root Cause of the Noncompliance
The root cause of noncompliance was an inadvertent oversight on the part of the QA
Manager. In preparing these reports the QA Manager failed lo recall the new
requirement for displaying the 70 pg/1 contour on the isoconcentration maps which
became effective with the approval of Revision 3 oflhe QAP on June 20, 2009.
b) Steps That Have Been Taken to Conect the Violation
The following sleps have been taken to conect the violation:
i. DUSA is preparing Addenda that will include updated mapping lo include the 70
pg/1 contour line on the isoconcentration maps for the 3"^ Quarter 2008 Report, 4'
Quarter 2008 Report and 1st Quarter 2009 Report,
ii. DUSA has issued the 3"* Quarter 2009 Quarteriy Report to include the 70 pg/1
contour line on the isoconcentration map.
c) Date When Compliance Was or Will be Regained
Compliance was re-established with the completion oflhe 3"* Quarter 2009 Report.
Pasl reports subsequent to the approval of Revision 3 to the QAP are being updated
with isoconcentration mapping which includes the 70 pg/1 contour.
d) Steps Taken to Prevent Reoccurrence ofthe Noncompliance
The steps described under 9.b) above have been taken."
6. Part of seciion 6(c) of Appendix A (item 3 second bullet) requires the quarterly chloroform
report to include: "3) Analytical results for each well summarized in a data table, that
includes historic analytical results for each well. "
Contrary to this requirement DUSA failed to provide in the Report historic analytical
results and summary data tables for all analytes in three wells including: TW4-23, TW4-
24 and TW4-25. While data tables were provided for historical analysis results for nitrate
-I- nitrite (as N) and chloroform in all wells except TW4-23, TW4-24, and TW4-25. In
addition, no informaiion was provided for any of the monitoring wells for four (4) analytes
i.e., carbon tetrachloride, chloride, chloromelhane, and methylene chloride in the Report
[see item 16(3) of the inspeciion form in Attachment 1]. However, historic analytical
results and summary data tables for all required analytes for the above three wells was
provided later in Tab K Addendum (received of December 21, 2009). In addition, DRC
Page 9
staff feels it is reasonable lo accept DUSA response to resolve violation 8 of the NOV for
this repeat violation, which is:
"a) Root Cause of the Noncompliance
The root cause of noncompliance was an inadvertent oversight on the part of the QA
Manager. In preparing these reports the QA Manager failed to recall the new
requiremenl for historic reporting of aniaytes olher than chloroform and nitrate in data
summary tables which became effective wilh the approval of Revision 3 of the QAP on
June 20, 2009.
b) Steps That Have Been Taken to Conect the Violation
The following sleps have been laken to conect the violation:
i. DUSA is preparing Addenda that will include historic summary tables which
include, in addition lo chloroform and nitrate, carbon tetrachloride chloride,
chloromethane, and methylene chloride for the 3^^* Quarter 2008 Report, 4""
Quarter 2008 Report and l" Quarter 2009 Report,
ii. DUSA has issued the 3*^^ Quarter 2009 Quarterly Report which includes historic
results for carbon tetrachloride, chloride, chloromethane, and methylene chloride in
addition to chlorofonn and nitrate included in past reports.
c) Date When Compliance Was or Will be Regained
Compliance was re-established wilh the completion of the 3"^ Quarter 2009 Report.
Past reports subsequent to the approval of Revision 3 to the QAP are being updated
with supplemental Addenda.
d) Steps Taken lo Prevent Reoccunence of the Noncompliance
The sleps described under 8.b) above have been taken."
Part of seciion 6(c) of Appendix A (third bullet) requires: "Calculate chloroform mass
removal by pumping wells. Calculations would include: 1) total historic chloroform mass
removed, 2) total historic chloroform mass removed for each pumping well, 3) total
chloroform mass removed for the quarter and, 4) total chloroform mass removed form
each pumping well for the quarter. "
Contrary to this requirement, the Report provided no calculated chloroform mass removal
by the pumping wells whatsoever. However, the required calculated data was included in
seciion 4.4.5 of the Addendum. Therefore no enforcement action is recommended.
"a) Root Cause of the Noncompliance
The root cause of noncompliance was an inadvertent oversight on the part of the QA
Manager. In preparing these reports the QA Manager failed lo recall the new
requirement for including historic mass removal of chloroform from the shallow
aquifer lo date, total historic chloroform mass removed from each of the pumping
wells lo date, chloroform mass removed from each pumping well in the quarter and
total chloroform removed in the quarter. This requirement became effective with the
approval of Revision 3 of the QAP on June 20, 2009.
Page 10
b) Steps That Have Been Taken to Conect the Violation
The following steps have been taken to conect the violation:
i. DUSA is preparing Addenda pertaining lo the 3"' Quarter 2008 Report, 4* Quarter
2008 Report and 1^' Quarter 2009 Report which include historic mass removal of
chloroform from the shallow aquifer lo date, tolal historic chloroform mass
removed from each of the pumping wells to date, chloroform mass removed from
each pumping well in the quarter and total chloroform removed in the quarter.
ii. DUSA has issued the 3^'' Quarter 2009 Quarterly Report lo include historic mass
removal of chloroform from the shallow aquifer to date, tolal historic chloroform
mass removed from each of the pumping wells lo date, chloroform mass removed
from each pumping well in the quarter and lotal chloroform removed in the quarter.
c) Date When Compliance Was or Will be Regained
Compliance was re-established with the completion of the 3'^'' Quarter 2009 Report.
Past reports subsequent lo the approval of Revision 3 to the QAP are being updaled lo
include historic mass removal of chloroform from the shallow aquifer to date, total
historic chloroform mass removed from each of the pumping wells lo date, chloroform
mass removed from each pumping well in the quarter and lotal chloroform removed in
the quarter.
d) Sleps Taken to Prevent Reoccurrence of the Noncompliance
The steps described under lO.b) above have been laken."
EDITORIAL CORRECTIONS FOR FUTURE CHLOROFORM MONITORING
REPORTS
In should be noted that on November 9, 2009 a letter was sent to DUSA regarding the same
conections listed below for the 3'^'' and 4"' quarter 2008, and 1^' quarter 2009 chloroform
monitoring reports. Because, 1) this Report was submitted to DRC on September I, 2009 and 2)
the review of this Report was compleled on December 1, 2009, its reasonable to conclude that
DUSA has not had time to make conections prior to submitting this Report. Therefore, il is /
reasonable lo expected that when the 3"^*^ quarter 2009 chloroform report is submitted to DRC
these conections will have been made.
1. In section 2.1.1 ofthe Report lists the chloroform monitoring wells that are to be sampled.
This lisl needs to be updaled with the following information to reflect cunent lisl of moniior
wells that are to be sampled as part ofthe chloroform contamination investigation:
• Well TW4-15 needs to be re-identified as MW-26.
• Well TW4-17 needs to be re-identified as MW-32.
• Wells TW4-23, TW4-24, and TW4-25 need lo be added to the list of required wells lo be
sampled.
2. In the table below, shows a discrepancy belween the total well depths recorded in the as-buill
well diagrams (HGC 2002) and lolal well depths recorded in the tables for the historical
groundwater depths recorded in Tab G of the Report.
Page 11
Well
TW4-10
TW4-11
TW4-I2
TW4-13
TW4-I4
TW4-16
TW4-18
TW4-I9
MW-32
Total Well Death Recorded in
the As-buill Well Diagrams
(HGC 2002)
IIO
IIO
101
102.5
92.5
142
132.5
137.5
125
Total Well Depth Recorded in
the Historical Tables in Tab G
of the Report
121.33
121.33
121.33
121.33
121.33
121.33
121.33
121.33
121.33
The above discrepancy needs to be resolved and conected.
SUMMARY OF PARAMETERS EXCEEDING GROUNDWATER QUALITY
STANDARDS
Compliance monitoring parameters nitrate, nitrate -i- nitrite, chloroform, and methylene chloride
exceeded (see Table below) their respective GWQS in the 2"'' quarter 2009 monitoring evenl.
These parameters are summarized in the table below (see Table I of the inspection forms in
Attachment 1).
2°'' Quarter 2009
Monitoring Parameter
(GWQS)
Nitrate, Nitrate -f
Nitrite (10 mg/L)
Chloroform
Methylene Chloride
(5 pg/L)
Wells Exceeding GWQS
TW4-22, TW4-24, and TW4-25
MW-4, MW-26, TW4-1, TW4-2,
TW4-4, TW4-6, TW4-7, TW4-10,
TW4-11, TW4-19, TW4-20, TW4-21,
and TW4-22.
MW-26 and TW4-16
Note: Wells in bold type MW-4, MW-26, TW4-19, and TW4-20 are pumping wells.
Nitrate, Nitrate -i- Nitrite (hereafter "Nitrate") - through a stipulated consent agreement
(Docket No. UGW 09-03) DUSA has agreed to submit a contamination investigation for
Nitrate exceeding GWQS al the mill site on or before January 4, 2010. This report was
received in lime and is cunently under DRC review. Therefore, no correclive action is
recommended at this time.
Chloroform - there is already a notice of violation and groundwater conective action order
in place (Docket No. UGQ-20-01) for the DUSA wells exceeding the GWQS for
Page 12
chloroform. Therefore, other than addition conecfive aclion described below for the
location at well TW4-6, no addifional conecfive acfion is recommended.
Carbon Tetrachloride and Methvlene Chloride - the presence of both of these groundwater
contaminants on the DUSA sile has been long known. Recent concentrations trends for
bolh are discussed below.
CARBON TETRACHLORIDE AND METHYLENE CHLORIDE EXCEEDING GWQS
Carbon Tetrachloride (hereafter "CTC") - historically CTC has exceeded its GWQS (5pg/L) in
pumping wells TW4-19 and TW4-20. However, in the 2"^ quarter 2009 chloroform monitoring
event CTC did not exceed ils GWQS in TW4-19 (1.2 pg/L) and TW4-20 (4.9 pg/L) [see Table 1
for the inspeciion forms in Attachment 1]. In TW4-19 CTC firsl exceeded the GWQS in the 3"*
quarter 2008 monitoring event. The following three quarterly moniloring events (4"" quarter 2008,
I" and 2"^ quarter 2009) CTC appears to be having a decreasing trend with the last two events
below the GWQS.
In TW4-20 beginning wilh the 4"^ quarter 2007 monitoring event CTC exceeded the GWQS in the
next four consecufive monitoring events (thru 4'^ Quarter, 2008) An increasing concentrafion
trend was also apparent with contaminant levels rising consistently during this time from 6.8 to
15pg/l. In the last two monitoring events (l" and 2"*^ Quarter, 2009) CTC appears lo show a
decreasing trend wilh levels from 5.7 to 4.9pg/L. DRC staff believes at this fime no further
administrafive action is needed for this problem, since: 1) CTC is a common co-contaminant of
chloroform, 2) CTC, at this fime, has only exceeded the GWQS in pumping wells TW4-19 and
TW4-20 where it is cunently being remediated by hydraulic capture by the pumping sysiem, and
3) both wells show an apparent decreasing trend. However, when the conecfive aclion plan
(hereafter "CAP") for the chloroform coniamination invesfigafion is approved, CTC cleanup
standards in TW4-19 and TW4-20 will also need to be established at levels equal to or below their
respective GWQS.
Methylene Chloride (hereafter "MC") - MC exceeded the GWQS (5 pg/L) in pumping well MW-
26 and moniloring well TW4-16 (see Table 1 for the inspecfion forms in Attachment 1).
Beginning with the 1^' quarter 2007 monitoring event MC in MW-26 has exceeded the GWQS in
the last seven consecufive monitoring events and shows an apparent over all increasing trend with
the last two monitoring events (1^' and 2""^ Quarter, 2009) showing an apparent decreasing trend
(see Figure 3 and Table 1 in Attachment I, below). No addilional conective action is needed for
well MW-26 since it is a pumping well used for hydraulic caplure of the chloroform
contaminafion.
Beginning wilh the 3"* quarter 2005 monitoring evenl MC in TW4-I6 has exceeded the GWQS in
eight ofthe last fourteen monitoring events and may show a decreasing trend (see Figure 4, below
and Table 1 in Allachment I below). Il is also important lo note that: I) downgradient wells MW-
31 and MW-32 from TW4-16 have historic non-detectable (<I.O pg/1) concentrafions of MC, 2)
the MC concentrations in TW4-6 may show a decreasing trend (see Figure 4 and Table 1 in
Atlachment 1 below), and 3) in 6 ofthe last 12 monitoring events MC concenlrations in TW4-6
Page 13
have been below the GWQS (5 pg/L) with the last monitoring two evenl below the detecfion limit
(1.0 pg/1), at this fime no corrective acfion for MC at this well locafion is recommended.
ELEVATED CHLORIDE CONCENTRATIONS
Although there is no GWQS for chloride it appears that chloride concentrations highs appear to be
in concert with wells that have exceeded the GWQS for nitraie. In Allachment 4, below there is a
chloride and nitrate isoconcentration map prepared by DRC slaff. Chloride and nitrate data for
the chloroform investigafion wells are from the 2"^* quarter 2009 moniloring event. The map
shows one chloride IOO mg/L isoconcentrafion line and one nitrate 10 mg/L (10 mg/L is the
GWQS for nitrate). Outside the IOO mg/L chloride isoconcentrafion line chloride concentrafions
range between 7-81 mg/L. Inside this isoconcentrafion line chloride concentrations are the
highest at the facility ranging belween 122 -759 mg/L. Bolh the chloride and nitrate
isoconcentration lines appear lo represent plumes that are in concert with each olher. On
December 1, 2009 a lelter was senl lo DUSA recommending they address and explain the chloride
high concentrafion in conjunction wilh the nitrate contamination invesfigation report that is due on
or before January 4, 2010.
STATUS AND CONDITION OF THE CHLOROFORM PLUME
The Plume No Longer Bound to the Soulh
Based on the chloroform concentration data in the moniior wells and DUSA chloroform
isoconcentration map (see Attachment 3), it appears that the chloroform plume is bound wilh
wells around the perimeler of the plume showing less than a 70 pg/L (GWQS) chloroform
concentraiions with the exception lo the south end of the plume at TW4-6. Since the 2""^ quarter
2005 monitoring event chloroform concentraiions show an increasing trend in TW4-6 and in the
1^' quarter and 2"'' 2009 moniloring events chlorofonn concentrations have exceeded the GWQS
with a reported chloroform concentrations of 81 and 120 pg/L respectively (see Table I or the
inspection forms in Atlachment I and Figure 2 below). Based on DUSA chloroform
isoconcentration map (see Attachment 3), and the 2"'' quarter 2009 waler levels and estimated
capture zones white mesa site map (see Attachment 5) it appears that the chloroform plume is
being captured by the pumping system with the exception of the area in the vicinity of wells TW4-
4 and TW4-6. TW4-4 and TW4-6 are located approximately 400 and 700 feet respectively down-
gradient of pumping well MW-4 and have chloroform concenlrations of 1,800 and 120 pg/L
respectively. Therefore, corrective action is recommended at TW4-6 with the following:
1. To hydraulically caplure the elevated chloroform concentration in the vicinity of wells
TW4-4 and TW4-6 by pumping TW4-6 and;
2. To bound the chloroform plume soulh of TW4-6 by installing a least one moniior well
down gradient of TW4-6 that will have a chloroform concentration below 70 pg/L.
During a DRC / DUSA conference call on Ociober 29, 2009, DUSA agreed that the recent
chloroform concentrations in well TW4-6 exceeded the 70 pg/1 GWQS, and that adjustment lo the
hydraulic containment program was in order. Two options lo improve hydraulic conlrol and
containment were discusse(l: I) increased pumping from the existing four (4) chloroform
pumping wells, and / or 2) addition of one or more pumping wells in or near well TW4-6.
Page 14
Further, DUSA agreed to choose and option and submit a plan of action and work schedule for
DRC review and approval by December 31, 2009. On November 9, 2009 DRC sent a
Confirmatory Acfion Letler to documeni this understanding. This plan of action was received on
December 31, 2009 and is cunently in review.
Highest Chloroform Concentrations in the Plume
The highest chloroform concentrations within the plume appear lo exist in the vicinity of two
locations (see DUSA chloroform isoconcentration map in Allachment 3): 1) at pumping well
TW4-20, and 2) pumping well MW-4. The chlorofonn concentration at TW4-20 is 6,800 pg/L.
Chloroform concentrations for wells in the vicinity of MW-4 range front 1,400 lo 2,800 pg/L. At
both these locations the pumping wells appear to be capturing these high chloroform
concentrations with the exception of possibility the area, as described above, in the vicinity of
TW4-4 (located approximately 400 feet down-gradient of MW-4) that has a chloroform
concentration of 1,800 pg/L. The distance belween these two locations is approximaiely 1,300
feet with wells that have chloroform concenlrations ranging from 410 to 980 pg/L. MW-4
appears to be, according lo the 2"^ quarter 2009 groundwaier conlour map, cross-gradient to the
southeast of TW4-20 (see DUSA groundwater contour map in Atlachment 2) due to: I) the
hydraulic stress on the aquifer from pumping wells MW-4, MW-26, TW4-19, and TW4-20 and, 2)
the hydraulic groundwaier mounding effect or recharge on the aquifer from the leakage of the
wild life ponds. Prior lo these man-caused influences, the aquifer near well MW-4 may have been
more down-gradient ofthe MW-26, TW4-19, and TW4-20 well locations, as seen the 1993
groundwaier contour map provided by the report by Peel Environmental Services (Peel 1993) [see
Attachment 2].
Chloroform Coniamination Source
Based on the 2"^* quarter 2009 chloroform isoconcentration maps (see Attachment 3) the
chloroform contamination source continues to appear lo be the abandoned scale house leach field
and former office leach field.
Based on the last 18 quarteriy sampling events (since I'* quarter 2005 to 2"'' quarter 2009) the
chloroform isoconcentrafion maps show that it appears the basic shape and extent of the
chloroform plume has not changed and may be in a static condition with the exception ofthe
recent migration of the plume extending south beyond TW4-6.
Page 15
References
Denison Mines (USA) Corp., June 2008, White Mesa Uranium Mill, Ground Waler Monitoring
Quality Assurance Plan.
Denison Mines (USA) Corp., August 2009, White Mesa Uranium Mill Chloroform Monitoring
Report 2"'* Quarter (April ihrough June 2009)
Denison Mines (USA) Corp., December 2009, White Mesa Uranium Mill Supplemental
Chloroform Monitoring Report Addendum 2""^ Quarter (April ihrough June 2009)
Denison Mines (USA) Corp., December 14, 2009, Letter: DUSA 3"^ Quarter, 2008, 4* Quarter
2008 and I^' Quarter 2009, Chloroform Monitoring Reports: Notice of Violation and Compliance,
Docket No. UGW09-04
Hydro Geo Chem, INC (HGC) August 29, 2002, Well Installation Report.
State of Ulah Division of Water Quality Department of Environmental Quality, March 8, 2005,
Ground Water Discharge Permit for Denison Mines (USA) Corp. at the White Mesa Mill Facility
Near Blanding, Utah.
Utah Division of Radiation Control, August 23, 1999, While Mesa Uranium Mill: Notice of
Violation and Groundwater Conective Aclion Order, Docket No. UGW20-0I.
Utah Division of Radiation Control, January 28, 2009, While Mesa Uranium Mill: Stipulated
Consent Agreement, Docket No. UGW09-03.
Utah Division of Radiation Control, November 10, 2009, DUSA 3'"'' Quarter, 2008 (dated
November 2008), 4"^ Quarter, 2008 (dated February 2009), and l" Quarter, 2009 (dated May
2009) White Mesa Uranium Mill Chloroform Monitoring Reports: Notice of Violation and
Compliance Order, Docket No. UGW09-05.
Utah Division of Radiation Control, November 9, 2009, Editorial Conections for Future
Chloroform Monitoring Reports for the Chloroform Contamination Investigafion, Dennison Mines
(USA) Corp., White Mesa Uranium Mill, near Blanding, Utah
Utah Division of Radiation Control, December 1, 2009, Apparent Chloride Plume Coincident with
the Nitraie Plume at the White Mesa Uranium Mill Facility near Blanding Utah:
Recommendation.
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Attachment 1
Inspection Forms For
2"" Quarter 2009
Utah Radiation Control Inspection Form
Chloroform Contamination Investigation
2nd Quarter 2009 Ground Water Monitoring Report and the Supplemental Addendum
Report
Denison Mines (USA) Corp.
White Mesa Uranium Mill, near Blanding, Utah
Regulatory Enforcement Documents:
• White Mesa Uranium Mill Ground Water Quality Assurance Plan (hereafter "QAP").
The QAP was originally dated November 17, 2006, (Revision 1.0); and was approved
by the DRC Executive Secretary on December 1, 2006. The DUSA QAP was revised
by DUSA on June 18, 2008 (Revision. 3.0) and was approved on June 20, 2008 by
the Execuiive Secretary. Later, the QAP was revised by DUSA in a submittal of
November 18, 2008 (Revision 4.0), and subsequently approved on March 30, 2009.
Changes in DUSA QAP Revision 4.0 were minor and do not alter any findings set out
below.
• Groundwater Discharge Permit No. UGW370004 (hereafter "Permit"). DUSA was
issued the Permit on March 8, 2005, last modified on March 17, 2008.
Date of Inspecfion/Report Review: January 4, 2010
DRC Inspection Staffi Dean Henderson
Were Violations Recommended: Yes
GROUNDWATER MONITORING REPORT
1. Was the 2nd quarter 2009 Groundwater Monitoring Report (hereafter "Report")
submitted to the DRC by September 1, 2009 as required Part I.F.I of the Pennit and
section 11 of the QAP?
Yes. The Report was submitted and received by DRC on September 1, 2009.
Violation: No
2. Was the decontamination procedure for all sampling equipment follow the requirements
in section 6.2.5 of the QAP? No. According to section 2.2.1(b) of the report: "Before
leaving the Mill office, the pump and hose are rinsed with de-ionized ("DI") water. Mill
personnel then proceed to thefirst well which is the well indicating the lowest
concentration of chloroform based on the previous quarters sampling results. ". Based
on this statement it appears the pump used to purge the wells was only rinsed with de-
ionized water prior to purging acfivities and not decontaminated according to Part
I.E. 1(a) ofthe Permit and section 6.2.5 ofthe QAP. Also, in the last sentence in seciion
2.2.2(a) of the report states: "The dedicated portable pump is appropriately
decontaminated prior to each purging sampling event and the QA rinsate sample is
collected after said decontamination but prior to the commencement ofthe sampling
event. ". Based on this statement it is not clear weather the portable pump was
decontaminated by rinsing it with de-ionized water as descnbed in section 2.2.1(b) of the
report or appropriately decontaminated prior to each purging sampling event foiiowing
decontamination procedures outlined in Part I.E. 1(a) of the Permit and section 6.2.5 of
the QAP.
Violation: Yes. Part I.E. 1(a) of the Permit and .section 6.2.5 of the QAP
3. Were groundwater levels measured at the locations required in the section 6.1 of the
QAP? Yes
Violation: No.
Well
MW-1
MW-2
MW-3
MW-4
MW-5
MW-11
MW-12
MW-13
MW-14
MW-15
MW-17
MW-18
MW-20
MW-22
MW-23
MW-24
MW-25
MW-26
MW-27
MW-28
MW-29
MW-30
MW-31
MW-32
TW4-1
TW4-2
TW4-3
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No Well
TW4-4
TW4-5
TW4-6
TW4-7
TW4-8
TW4-9
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
TW4-16
TW4-18
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
P-4
P-5
P-3
P-4
P-5
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
4. Were there Field Data Work Sheets for each Monitoring Well have the information listed
Part I.F. 1(a) and in section 7.1 ofthe QAP? Yes (see table 5)
Violation: No
5. Where purging procedures followed as required in section 6.2.7 of the QAP (see table 4)?
No. Violation: Yes.
There where one set of field parameters recorded and parameters were measured prior
to purging the required two casing volumes (see Table 4) in the following wells:
TW4-1, TW4-2, TW4-3, TW4-4, TW4-5, TW4-6, TW4-7, TW4-8, TW4-9, TW4-10,
TW4-11, TW4-12, TW4-13, TW4-14, TW4-16, TW4-1 8, TW4-21, TW4-22, TW4-
23, TW4-24, and TW4-25. Therefore, there was a failure to show that the field
parameters were not within 10% to two consecutive measurement prior to sampling
as outlined in section 6.2.7(d)(v) ofthe QAP.
• TW4-14 was sampled but according to the field data work sheet the well was not
purged. According to the field data work sheet a pump was used to attempt the purge
with no success. Tab G of the Report records that the water level below ground
surface is 87.59 feet. And according to the well completion details for TW4-14 the
well depth is 92.5 feet bis (HGC 2002). Therefore, there was approximately 4.9 feet
of water in the well column which qualifies TW4-14 to follow the purging procedures
with a bailer as out lined in section 6.2.7(e) of the QAP.
Were water quality QC samples collected as required in section 4.3 of the QAP (see the
table below and Table 2)? Yes. Violation: No
Sample
Duplicate for each batch
of 20 samples.
Trip Blank for each
cooler shipped with VOC
samples.
Equipment Blank for
sampling equipment in
conlact with the
groundwater (Pumps,
bailers etc).
Yes/ No
yes
yes
yes
Violation
no
no
no
Comments
TW4-65 a duplicate of MW-32
(former TW4-17)
TW4-70 a duplicate of TW4-8
One equipment blank identified as
TW4-63
7. Were all the required
monitor well as requi
Violation: No.
compliance monitoring parameters analyzed for
red in section 4 of the Appendix A of the QAP?
each compliance
Yes.
Sample ID
MW-4
MW-26
MW-32
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
TW4-8
TW4-9
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
Parameters with their GWQS
'"Nitrate
10 mg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Chloroform
70 pg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
yes
yes
ves
yes
yes
yes
Carbon
tetrachloride
5 Mg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Chloromethane
30 ng/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Methylene
chloride
5 Mg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Chloride
No
GWQS
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
TW4-16
TW4-18
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
1. Nitrate -i- Nitrite as N
8. Were all groundwater quality analyses perfonned with a minimum detection limit or
reporting limit less then its respective GWQS (See Table 1)?: Yes
Violation: No
9. Did samples arrive at the contracted laboratory below 6°C as required in section 6.2.12(e)
of the QAP? Yes. According to the chain of custody document provided in Energy
Laboratories analytical summary report that is provided in Attachment H the Report,
samples arrived at a 3^0. Violation: No
10. Were the compliance monitoring parameters analyzed by excepted EPA analytical
methods as required in Table 1 in section 8.2 ofthe QAP? Yes (see table below).
Violation: No
Sample ID
MW-4
MW-26
MW-32
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
TW4-8
TW4-9
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
TW4-16
TW4-18
TW4-19
Parameters with their Analytical Methods
'"Nitrate
E353.2
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chloroform
SW8260B
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Carbon
tetrachlonde
SW8260B
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chloromethane
SW8260B
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Methylene
chloride
SW8260B
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chloride
A4500-
CL
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-60
TW4-63
TW4-65
TW4-70
TW4-73
*Trip Blank
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
* VOC only
11. Were the compliance monitoring parameters within maximum holding times as required
in Table 1 in section 8.2 of the QAP? Yes. Violation: No "
Sample FD
MW-4
MW-26
MW-32
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
TW4-7
TW4-8
TW4-9
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
TW4-16
TW4-18
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-60
TW4-63
TW4-6.^
Parameters with their holding tiines
'"Nitrate
28 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chloroform
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Carbon
tetrachloride
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chloromethane
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Methylene
chloride
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Chloride
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
TW4-70
*Tnp Blank
Yes Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
12. Did any of the compliance monitoring parameters exceed groundwater quality standards
(GWQS) [See Table 1]? Yes.
Nitrate, Nitrate + Nitrite: TW4-22, TW4-24, and TW4-25
Chlorofoi-m: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-6, TW4-7, TW4-10, TW4-
11, TW4-19, TW4-20, TW4-21, and TW4-22.
Methvlene Chloride: MW-26
Violation: Yes
13. Were QA/QC objectives meet for measurement of data (precision, accuracy,
representativeness, completeness, and comparability) as required in section 3 ofthe
QAP? Yes. See Details below.
Violation: No
Precision (see Table 2): Duplicate sample for MW-32 (TW4-65) and TW4-8 (TW4-
70) were within the 20% relative percent difference. Therefore the dala set passes
the precision guidelines.
Representativeness (see Table 2): Duplicate sample for MW-32 (TW4-65) and TW4-
8 (TW4-70) were within the 20% relative percent difference. Therefore the data set
passes the representative guidelines.
Completeness: Is based on precision (see comment above), accuracy (see comment
below), and holding time evaluation. Based on this criteria as described above
precision, accuracy, and the holding time for the data set is in compliance. Therefore,
completeness passes the 100% criteria.
Accuracv: Based on the QA/QC laboratory report the percent recovery for analyte
samples are within expectable recovery ranges for accuracy.
Comparability: Is based on sampling conditions, collection techniques, measurement,
procedures, methods, and reporting units. After review of the data and report it
appears that the comparability requirements were meet.
14. Were the samples collected starting from least contaminated to most contaminated as
required in section 1 of Appendix A ofthe QAP (see Table 3)? Yes
Violation: No.
15. Was analyses preformed by a State ofUtah Certified Heath Laboratory as required in
section 2.5 of the QAP? Yes. Laboratory: Energy Laboratories. Certificate
NO.WY00002.
Violation: No
16. Did the Report include all reporting requirements as required in section 6 of Appendix A
of the QAP? No.
Violation: No
The following required information was missing in the Report but, was included in the
December 2009 Addendum (hereafter "Addendum") for this Report.
1) Part of section 6(c) of Appendix A (1^' bullet item 3) requires: "...3) depth to
groundwater measured and groundwater elevalion from each monitor well
summarized in a data table, that includes historic groundwater level data for each
well,..."
The Report did not include a table with historic groundwater level data for wells
TW4-23, TW4-24, and TW4-25.
2) Part of section 6(c) of Appendix A (2"^ bullet item 1) requires: "a current
chloroform isoconcentration map with one ofthe isoconcentration lines showing the
70 pg/L boundaiy,"
The Report did not include a current chloroform isoconcentration map.
3) Part of section 6.c of Appendix A (2"'' bullet item 3) requires: "Analytical results for
each well summarized in a data table, that includes historic analytical results for
each well."
For wells TW4-23, TW4-24 and TW4-25 there was no historic analytical results
reported. While such data tables were provided for nitrate + nitrate (as N) and
chlorofonn, no infonnation was provided i.e., carbon tetrachloride, chloride,
chloromethane, and Methylene chloride in the Report.
4) Part of section 6.c of Appendix A (3"* bullet) requires: "Calculate chloroform mass
removal by pumping wells. Calculations would include: 1) total historic chloroform
mass removed. 2) total historic chloroform mass removed for each pumping well, 3)
total chloroform mass removed for the quarter and, 4) total chlorofonn mass
removed form each pumping well for the quarter. "
No calculated chloroform mas's removal by the pumping wells reported in the Report.
References
Denison Mines (USA) Corp., June 2008, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assuiance Plan.
Denison Mines (USA) Corp., August 2009, White Mesa Uranium Mill Chloroform
Monitoring Report 2nd Quarter (April through June 2009)
Denison Mines (USA) Corp., December 2009, White Mesa Uranium Mill Supplemental
Chloroform Monitoring Report Addendum (April through June 2009)
State of Utah Division of Water Quality Department of Environmental Quality, March 8,
2005, Ground Water Discharge Permit for Denison Mines (USA) Coip. at the White Mesa
Mill Facility Near Blanding, Utah.
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
MW-4
1s(Qtr3/1ff05
2nc1 Qir 5/25/06
3rd Qtr 8/31/05
4th Qtr 12/7/05
1sl Qtr 3/9/06
2nd Qir 6/14/06'
3rd Qtr 7/20/06
41hQtr 11/8/06
lsl Qtr 2/28/07
2nd Oir 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
1st Qtr 3/28/08
2nd Otr 6/25/08
3rd Qtr 9/10/08
4th Qtr 10/15/08
1s( Qtr 314/09
2nd Qir 6/23/09
MW-4A(TW4-A)
lsl Qtr 3/16/05
2nd Qir 5/25/05
3rd Qtr 8/31/05
4lhQtr 12/7/05
1st Qtr 3/9/06
2nd Qir 6/14/06
3rd Qtr 7/20/05
41h Qtr 11/W05
lsl Qtr 2/28/07'
Carbon Tetrachloride
(5 pg/L)
NA
NA
<io <so
<50
<S0
<S0
NA '
NA
<to
<50
<50
<50
<50
MW-26((ormerTW4-15)
1sl Qtr si 16/05
2nd Qir 5/25/05
3rd Qir 8/31/05
41h Qtr 12/7/05'
lsl Qtr 3/9/06
2nd Otr 6/14/06
3rd Otr 7/20/06
4th Qtr 11/8/06
1st Qtr 2/28/07
2nd Qir 6/27/07
3rd Cll r 8/15/07
4lh Qtr 10/10/07
1st Qir 3/28/08
2nd Qir 6/25/08
3rd Qir 9/10/08
4lhQlr 10/15/08
4lhblr 11/18/09
1st Qtr 3/4/09
2nd Qir 6/23/09
NA
NA
<5.0
<50
<50
<S0
<S0
<1.0
<1 0
<1.0
cl.b
<1 0
<1.0
<1.0
<l'.0
NA
<2.0
<1.0
<l'.0
MW-32 (former TW4-17)
ist Qir 3/16/05
2nd Qtr 5/25/05
3rd Qtr 8/31/05
4lhQtr 12/7/05
IslQtr 3/9/06
2nd Qtr 6/14/06
3rd Qtr 7/20/06
4th Qir 11/8/06
lsl Qtr 2/28/07'
2nd Qtr &27/07
3rd Qtr 8/15/07
41hQtr 10/10/07
1st Qtr 3/28/08
2nd Qir 6/25/08
3rd Qtr 9/10/08
41hQlr 10/15/08
1st Otr 3/4/09
2nd Qir 6/23/09
NA
NA
<i.O
<1.0
<1 0
<10
<1 0
<10
<1 0
<10
<1'0
<10
<1 0
<1 0
<i'.o
<1.0
<1.0
<1.0
21
1.6
1 8
1.9
1.7
1 7
1.8
1.8
I 7
1 5
' 1 3
24
1 9
Parameter
GWQS
Chloride
No GWQS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
' 53
49
49
48
50
47
45
47
45
42
42
35
45
37
34
55
53
54
54
54
60
Chloroform
(70 pg/L)
2,900
3.170
3.500
3.000
. 3,100
3.000
.2.820
2,830
. 2.300
2.000
2,600
2.300
2,400
2,500
' 1,800
2,100
. '•• 2,200
1,800
3,700
3,740
3,800
- 3,000
3,700
3,300
3,190
3,370
2,500
Chloromethane
(30 pg/L)
NA
NA
<10
<50
<S0
<S0
<S0
' 1.4
<1.0
<1 0
<1 0
<1.0
<1 0
<10
<1 0
<i'o
<L0
<1.0
NA
NA
<10
<so
<50
<50
<50
<1.0
<1.0
Well abandonded
55
52
52
65
54
56
49
57
57
49
57
44
64
49
48
33
32
30
32
31
32
32
31
32
31
29
30
26
30
31
310
442
960
1,000
•-1,100
830
• 2,170
282
570
300
1,400
2,000
- 930
1,300
. . 630
NA
1.700
950
410
<io'
<1.0
<1 0
<1 0
<1 0 '
<1 0
<i o'
<1 0
<1 0
<1 0
<i'o
<1 0
<1 0
<1 0
<:10
<1 0
<10
cl 0
NA
NA
5.4
<50
<S0
<S0
<50
<1.0
<ro <1 0
<10
<1.0
<1 0
<1.0
<i;o
NA
<20
<10
<1.0
NA
NA
32
<1.0
<'l'.0
35
' 1 8
1 5
<1.0
<1.0
<1.0
<1.0
<1.0
<i 0
<1.0
<1.0
<i.0
<1.0
Methylene Chloride
(5 pg/L)
NA
NA
<10
<50
<S0
<S0
<S0
<1 0
<10
<1 0
<1 0
<'l 0 '
<1 0
<1 0
<1 0
<1 0
<'l.O
<1.0
NA
NA
<10
<S0
<50
<50
<50
<1 0
<1 0
NA
NA
<5.0
^50
<50
<50
<S0
NA
NA
NA
<1 0
<10
<1 0
<10
<1 0
<10
'el.O
<10
<1 0
<10
cl 0
<1.0
c1 0
<1 0
cio'
<1 0
Nitrate, Nitrate +
(10 mg/L)
2.6
•^^ 5 5
13
36
14
%0
53
24
• 100
51
12
NA
<oi"
<0 1
cOI
<0 1
<0 1
<0 1
<i b
<.l
'<i.'o
<1.0
<i.b
<1.0
< 1
<1.0
<1.0
<0 05
< i
<0 1
Nitrite
6.3
7.1
7.0
7.0
6.0
6 0
1 2
64
6.3
70
6.2
62
5.8
61
64
"5.9
5.7
6.2
7 1
7.8
69
6.7
58
7.3
1 2
7.1
7 1
03
02
02
03
02
02
1 4
03
06
04
1
0.6
0.1
0.6
02
0 1
04
02
NA = not ana'yzetd
NS = not sampled
Shaded indicales concentraiions exceening GWQS
Bold and ilaiics indicates the MDL exceeded lhe GWQS
1 st Qir = January - March
2nd Qtr = Apnl - June
3rd Qtr = July - September
4th Qtr = October - December
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
TW4-1
1st Qtr 3/16/05
2nd Qtr 5/25/05
3rd Qtr 8/31/05'
4th Qtr 12/7/05
1st Qtr 3/9/06
2nd Qir 6/14/06
3rd Qtr 7/20/06
4th Qtr 11/8/06
1st Qtr 2/28/07
2nd Otr 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
1st Qtr 3/28/08
2nd Qir 6/25/08
3rd Qtr 9/10/08
4th Qtr 10/16/08
lsl Qtr 3/11/09
2nd Qir 6/23/09
1^4-2
lsl Qtr 3/16/05
2nd Qir 5/26/05
3rd CJlr 8/31/05
4th Qtr 12/7/05'
1sl Qtr 3/9/06
2nd Qir 6/14/06
3rd Qtr 7/20/06
4th Qtr l'l/8/06
1st Qtr 2/28/07
2nd Oir 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
1st Qtr 3/28/08
2nd Qir 6/25/08
3rd Qir 9/10/08
4th Qtn 0/15/08
4th Qtr 11/18/09
lsl Qtr 3/11/09
2nd Qtr 6/23/09
TW4-3
1st Qtr 3/16/05
2nd Qtr 5/25/05
3rd Oir 8/31/05
4th Oir 12/7/05
1st Oir 3/9/06
2nd Qtr 6/14/06
3rd Qir 7/20/06
41h Otr 11/8/06
lsl Otr 2/28/07
2nd Qtr 6/27/07
3rd Otr 8/15/07
4lh Qtr 10/10/07
lsl Otr 3/28/08 '
2nd Qtr 6/25/08
3rd Qtr 9/10/08
41h01r 10/15/08
lsl Qtr 3/4/09
2nd Oir 6/23/09
TW4-4
lsl Otr 3/16/05'
2nd Qtr 5/25/05
3rd Otr 8/31/05
4th Otr 12/7/05
lsl Qir 3/9/06
2nd Otr 6/14/06
3rd Qtr 7/20/06
41h Qir 11/8/06
lsl Qir 2/28/07
2nd Qtr 6/27/07
3rd Oir 8/15/07
41h Qtr 10/10/07
lsl Qir 3/28/08
2nd Qir 6/25/08
3rd Oir 9/10.-08
4th Qtr 10/15/08
4th Qtr 11/18/09
lsl Qtr 3/4/09
2nd Qtr 5/23/09
Parameter
GWQS
Carbon Tetrachloride
(5 pg/L)
NA
NA'
<10
<50
<S0
<50
<S0
NA
NA
<io
<so
<so
<50
<so
NA
NA
NA
<1 0
<i'.'o
<1 0
<1 0
<i'o
<1.0
<1.0
<1.0
<1.0
<1 0
<1.0
<1.0
<1.0
cl.O
<1.0
<1 0
NA
NA
<io
<50
<so
<so
<so
NA
<2 0
1.4
\.2
1.4
"i:3
1.3
i.3
l'i
1.3
1.3
1.1
1
2.3
1.8
2.5
2.2
21
2 3
2.2
2.4
2 4
22
2
i 7
1 5
1 7
1.5
1.5
1 6
1.5
1.4
1 2
1 2
Chloride
No GWQS
NA
NA
NA
52
49
48
51
47
47
45
43
43
39
39
35
41
37
37
NA
NA
NA
56
56
56
54
55
54
60
49
'6i
48
46
42
47
NA
46
44
NA
NA
NA
26
26
26
26
23
22
23
24
27
21
19
19
22
21
20
NA
NA
NA
54
si
48
50
49
49
47
45
47
43
42
39
44
NA
37
34
Chloroform
(70 pg/L)
2.700
3.080
2,900
2,40b
2,700
2,200
2,840
... 2,260
'-' 1.900
1,900
2.300
2,000
2,000
1,900
: 1,700
1,700
. 1.700
1,500
3,700
3,750
3,900
3,500
; 3,800
3,200
4,120
3,420
2.300
3,000
340
3,200
3,300
. ... 3,100
2,800
NA
3,200
• 3,100
-'•r 2,800
<1 0
cl 0
cl 0
cl 0
cl 0
cio
cio
cl 0
c10
cl.O
ci 0
cl 0
d'o
cl 0
cl.O
cl 0
cl 0
cl 0
3,100
•' 2,400
3.200
2.800
2.900
2.600
2.850
2,670
2,200
2,400
. 2,700
2.500
2.800
. 2.500
2.200
NA
2.500
2.200
1.800
Chloromethane
(30 pg/L)
NA
NA " '
cio
<50
<S0
<S0
<50
cl 0
cl 0
cl 0
cl 0
cl 0
cl.O
cl.O
cl 0
cl 0
cl 0
cl 0
NA
NA
cio
<S0
<S0
<50
<S0
cl 0
cl 0
c1 0
cl.O
cl 0
cio
cl.O
c 1 p
NA
c2 0
cl.O
cl.O
NA
NA
64
cl 0
2.3
1.6
2.2
cl.O
cl 0
cio
cl.O
cl.O
cl.O
c1 0
c1.0
cio
cl.O
cl.O
NA
NA
cio '
<50
<S0
<50
<S0
cl 0
cl 0
cl 0
c1 0
ClO
cl 0
cl.O
cl 0
NA
c2.0
cl 0
cl.O
Methylene Chloride
(5 pg/L)
NA
NA
<I0
<50
<S0
<50
<S0
cl 0
cl.O
cl.O
cio'
cl 0
cl O'
cl.O
cl.O
cl.O
cl.O
cio
NA
NA
<10
<so
<50
<S0
<50
cl 0
cl 0
cl.O
cl.O
cl.O
cl.o'
cl 0
cl.O
NA
c2 0
cl 0
cl 0
NA
NA
cl 0
cl 0
cl 0
cl.O
cl 0
cl 0
cl 0
<1 0
cl.O
<1 0
cl.o'
cl 0
cl 0
cl 0
cl.O
cl.O
NA
NA
<10
<so
<50
<50
<S0
cio
cl 0
cl 0
cl 0
cl 0
cio
cl 0
cl.O
NA
c2.0
cl 0
cl 0
Nitrate, Nitrate + Nitrite
(10 mg/L)
91
. 106
98
97
94
9.6
9.2
8.9
9
8.4
7.8
7.6
' 8.68
8.15
93
7.5
6.9
77
86
80
7.8
7.5
71
74
76
7.3
7.8
7.3
6.9
6.9
7.4
7.1
8 0
NA
65
6.4
35
37
35
33
33
7.1
2.9
1 5
3 1
3.3
3.1
2.8
2.8
2.9
2.7
2.6
2.5
29
100
11.3
99
102
9.5
86
97
101
90
94
9.5
9.5
92
108
'8.8
101
NA
10.2
82
NA ^ not analyzed
NS - not sampled
Shaded mfJicates noncefitraiions e
Bold and ilaiics indicates fhe MDL
1st Qtr = January - March
2nd Otr ^ April June
3rd Qtr = July - Septemher
4ih Otr = October - Deuombef
ixceeding GWQS
exceeded the GWOS
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampiing Evenl
TW4-5
lsl Otr 3/16/05
2nd Qir 5/25/05
3rd Qtr 8/31/05
4lhOtr 12/7/05
151 Qtr 3/9/06
2nd Qtr 6/14/06
3rd Otr 7/20/06
4th Otr 11/8/06
lsl Qtr 2/28/07
2nd Qtr 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
ist Qtr 3/28/08
2nd Qtr 6/25/08
3rd Qtr 9/10/08
4th Qtr 10/15/08
1st Qtr 3/4/09
2nd Qir 6/23/09
TW4-6
1st Qtr 3/16/05
2nd Oir 5/26/05
3rd Qtr 8/31/05
41h Qtr V2/7/05
lsl Qtr 3/9/06
2nd dir 6/14/06
3rd Otr 7/20/06
41hQtr 11/8/06
lsl Qtr 2/28/07
2nd Qtr 6/27/07 '
3rd ar 8/15/07
4lh Qir 10/10/07
1sl Qtr 3/28/08
2nd Qtr 6'25/b8
3rd Qtr 9/10/08
4lh Qir 10/16/08
1st Qtr 3/11/09
2nd Qtr 61(23/09
TW4-7
1st Otr 3/16/05
2nd Qtr 5/25/05
3rd Oir 8/31/05
4lhQlr 12/7/05
1st Qtr 3/9/06
2ndQlr6/i4/06
3rd Qtr 7/20/06
41hQ'tr 11/8/06
lsl Qtr 2/28/07
2nd Otr 6^27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
lsl Qtr 3/28/08
2nd Oir 6/26/08
3rd Qtr 9/10/08
41hQir 10/i 5/08
41hQlr 11/18/09
1sl Qtr 3/11/09
2nd Qtr 5/23/09
•n«4-8
1st Qir 3/16/05
2nd dtr 5/26/05
3rd dir 8/31/05
41hQlr 12/7/05 '
1sl Qir 3/9/06
2ndQlr6/i4/06
3rd Qtr 7/20/06
4th Qir 11/8/06
1st Qir 2/28/07
2nd Qtr 6/27/07
3rd Qir 8/15/07'
4th Qtr 10/10/07
lsl Qir 3/28/08
2nd Oir 6/25/08
3rd Qtr 9/10/08
41 h Qtr 10/15/08
Isl Qtr 3/4/09
2nd Qir 6/23/09'
Carbon Tetrachloride
(5 pg/L)
NA
NA
c2 5
c2 5 "
<2 5
c2.5
<1 0
<1.0
cl 0
cl 0
cl 0 "
cl.O
ClO
cl.O
cl.O
cl.O
cl.O
cl.O
NA
NA
<1 0
cl 0
cl 0
cio
cl 0
cio
cl b
cio
cio
cl 0
c10
cl 0
ClO
cl.O
cl.O
<1.0
NA
NA
<10
<50
<50
<50
<50
1 5
1 1
•1.5
i.4
1 2
.1.3
1.3
1.4
NA
c2 0
1.2
cl.O
NA '
NA
cl 0
cl b
cl'o
cl.O
cl.O
cio
cl 0
cio
cio
cio •
cl 0
cio
cl 0
cio
cl 0
cl.O
Parameter
GWQS
Chloride
No GWQS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
56
52
51
54
55
57
45
38
39
36
37
34
37
34
37
32
31
30
37
65
32
38
36
36
33
36
35
33
35
37
52
48
47
51
49
47
45
44
45
43
43
35
40
35
37
41
39
37
39
40
39
42
42
43
46
45
39
44
42
44
Chloroform
(70 pg/L)
120
113
82
63
66
61
53.7
47.1
35
26
92
94
n
93
11
10
12
13
cl.O
' 25
10
17
31
19
11
42 8
46
1 1
18
18
52
24
39
37
81
120
3,100
2,700
3,100
2,500
1.900
2.200
2.140
2.160
1,830
2,600
2.300
1,900
2,200
i.SOO
1.600
NA
2.500
1,800
1.400
10
cl 0
1 1
cl 0
1 3
1 8
cl 0
cl 0
25
25
1 5
3.5
cl.O
cl 0
c1 0
cl 0
cl 0
cl 0
Chloromethane
(30 pg/L)
NA
NA
" 58
2.5
3.1
3.1
cl.O
cl.O
cl 0
cl 0
cl 0
cl 0
cl 0
cl 0
c1 0
d.O
<1 0
c10
NA
NA
28
1 3
cl.O
cl.O
cl 0
cl 0
cl.O
cl 0
cl.O
cl 0
cl.O
cl 0
cl 0
cl 0
cl 0
cl 0
NA
NA
ClO
<S0
<S0
<50
<S0
cl 0
cl.O
cl.O
<1.0
cl 0
cl 0
cl 0
cl 0
NA
c2.0
cl 0
cl 0
NA
NA
1 7
cl 0
2.1
10
cl.O
cl 0
cl 0
cl 0
cl 0
cl.O
cl 0
cl 0
cl 0
cl 0
cl 0
cl 0
Methylene Chloride
(5 pg/L)
NA
NA
c2.5
c2 5
<2.5
c2 6
cl 0
cio
cl.O
cl 0
cl 0 '
<1 0
cl 0 '
cl.O
cl.O
cl.O
cl.O
<1 0
NA
NA '
cl.O
cl.O
cl.O
cl 0
cl O'
c'l 0 '
cl 0
cl.O
cl.O
cio
cl 0
cl 0
<1 0
<1.0
clo"
cio
NA
NA
<10
<so
<so
<so
<so
Cl.O
cl 0
cl.O
Cl.O
cio
cl 0
cio'
cl 0
NA
c2 0
cio '
c1 0
NA
NA
NA
cl.b
cl 0
cl O'
cl 0
cl.O
cl.O
cl 0
cl.O
cl.O
cl.O
cl 0
cl 0
cl 0
el 0
cl 0
Nitrate, Nitrate +
(10 mg/L)
NA
cOI
cl 0
ClO
cl 0
c.1
cl.O
cl 0
c0 05
c0 05
cO 1
cOI
Nitrite
49
3 7
60
60
6.0
5.9
6 7
29
78
7.0
7 7
8.2
7.4
8.7
79
9.3
7.9
7.5
02
04
08
09
1.2
1 0
0.6
1 4
1 8
06
07
0:8
1 1
09
1 1
1.0
2.2
2.7
5.2
5.4
5.2
5.3
1
4.5
4.7
46
6
6 1
47
47
42
4.8
4.16
4.01
3.7
3.8
02
0.3
0 1
07
02
05
0 i
NA = nol analyzed
NS = not sampled
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates lhe MDL exceeded the GWOS
1 st Qir - January - March
2nd Qtr = April • June
3rd Qtr ^ July - September
4th Otr = Ociober December
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
TW4-9
1st Qtr 3/16/05
2nd Qtr 5/26/05
3rd Qtr 8/31/05
4th Qtr 12/7/05
1st Qir 3/9/06
2nd Qtr 6/14/06
3rd Qir 7/20/06
4th Qir 11/8/06
lsl Qtr 2/28/07
2nd Qlr'6/27/07
3rd Qir 8/15/07
4th Qtr 10/10/07
1st Otr 3/28/08
2nd Qtr'6/25/08
3rd Qir 9/10/08
4th Qir 10/15/08
161 Qir 3/4/09
2nd Qtr 6/23/09
TW4-10
1sl Oir 3/16/06
2nd Qtr 5/26/05
3rd Oir 8/31/06
4th Otr 12/7/06
lsl Oir 3/9/06
2'nd Qtr 6/14/06
3rd Qtr 7/20/06
4ihQlr li/8/06
lsl Qtr 2/28/07
2nd Qtr 6/27/07
3rd Qtr 8/16/07
4th Qtr 10/10/07
lsl Qtr 3/28/08
2nd Qir 6/25/08
3'rdQlr9/10/b8
4th Qtr 10/15/08
4th Qtr 11/18/09
isl Qtr 3/11/09
2nd Qtr 6/23/09
TW4-11
Isi Qtr 3/16/05
2nd Oir 5/25/05
3rd Qtr 8/31/05
4th Qtr 12/7/05
1st Qtr 3/9/06
2nd Oir 6/14/06
3rd Qtr 7/20/06
4th Qtr 11/8/06
1st Qtr 2/28/07
2nd Otr 6/27/07
3rd Qtr 8/15/07
4thQir 10/ib/07
1st Qtr 3/28/08
2ndQlr6'25/08
3rd Qtr 9/10/08
4ihQtr i'o/15/08
4th Qtr 11/18/09
1st Qtr 3/11/09
2nd Qtr 6/23/09
TW4-12
1st Qtr 3/16/05
2nd Qtr 5/25/05
3rd Qtr 8/31/05
4th Qtr 12/7/05
1st Qtr 3/9/06
2nd Qtr 6/14/06
3rd Otr 7/20/06
4th Qtr 11/8/06
lsl Qtr 2/28/07
2nd Qtr 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/i0/07
lsl Qtr 3/28/08
2nd Qtr 6/25/08
3rd Qtr 9/10/08
4th Qtr 10/15/08
1st Qtr 3/1 1/09
2nd Qir 6/23/09
—
Carbon Tetrachloride
(5 pg/L)
NA
NA
cl.O
cl.O
cl'o
cl.O
<1 0
<1.0
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
<1.0
cl.O
<1.0
ci.O
NA
NA
c2.5
c2.6
c5.0
c5.0
c5.0
cl.O
d.O
d.O
ci.O
d 0
d 0 ' '
d 0
ci 0 '
NA
c2 0
dO
d 0
NA
NA
<10
<100
<50
<S0
<50
1 7
1 3
16
1 7
16
cl.O
d 0
d 0
NA
c2 0
d 0
cl 0
NA
NA
d 0
d.O
d 0 '
d 0
dO
cl 0
d 0
d.O
d.O
cl 0 '
d.O
d 0
d.O
d 0
d 0
d 0
Chior
Parameter
GWQS
de
No GWQS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
42
38
39
41
44
44
42
38
40
35
35
28
58
30
30
52
50
54
61
58
2
54
59
59
55
58
51
61
64
62
58
56
56
56
55
54
53
53
53
63
46
42
47
49
44
19
19
16
16
16
16
18
29
16
16
19
18
22
23
22
Chloroform
(70 pg/L)
3.8
1.2
cl 0
cl 0
cl 0
19
dO
cl 0
cl 0
21
96
87
1 3
i
cl 0
d 0
cl 0
d 0
. 140
62 4
110
300
190
300
504
452
600
360
.660
470
620
::72o
660
NA
i.200
1.100
1,200
4,400
3,590
4,400
4.400
4,400
4,300
4,080
3,660
. 3.600
3.80b
4,500
4,400
340
640
900
NA
1,000
.1,000
980
d.O
d 0
ClO
d 0
d 0
cl 0
cl.O
d 0
d 0
cl 0
d 0
cl 0
d 0
cl 0
cl 0
cl 0
d 0
cl 0
Chloromethane
(30 pg/L)
i\IA
NA
29
d 0
2.6
2.7
d.O
d 0
d 0
cl 0
d.O
d 0
d 0
d 0
d 0
d 0
d.O
d.O
NA
NA
6.2
c'2'5
c5 0
c5.0
c5 0
1.6
d 0
d 0
d 0
d 0
d 0 '
dO
d 0
NA
c2.0
d 0
cio '
N A
NA
dO
<100
<so
<50
<50
27
d.O "
d 0
d.O
d 0
d 0
d 0
d 0
NA
c2 0
d.O
cl 0
NA
NA
5.8
1
26
1 4
1.4
d 0
d 0
cl.o'
d 0
d 0
d 0 "
cl 0
cl 0
dO
d 0
cio
Methylene Chloride
(5 pg/L)
NA
NA
d 0
d 0
dO
d.O
d 0 "
d 0
d 0 '
d 0 '
d 0
'd'o
d 0
d 0 "
d 0
dO
d 0 '
d 0
NA
NA
<2.5
c2.5
c5.0
'<5 0 '
c5 0
d 0
d.O '
d.O
d 0
d 0
d.O
d.O
d.O
NA
'c2 0'
d.O
d.O
NA
NA
<10
<100
<50
<S0
<50
1 3
16
do'
cl 0
1.2
d 0
cl.o'
cl 0
NA
'c2 0
d 0 '
d 0
NA
NA
d.O
d 0
d.O
d.O
d.O
cl 0
d.O
d 0
d 0
d 0
d 0
d 0
d 0
d.O
<1 0
cl 0
Nitrate, Nitrate -i- Nitrite
(10 mg/L)
1 3
1 3
1.3
1.3
1 5
1 5
09
07
06
1 3
1 8
"2
2 i
23
2 79
1 99
25
23
1 6
03
1.1
3.3
24
3.5
68
57
73
5.1
7.3
67
7.3
9.9
923
:. 105
NA
. 11.6
9.8
8.7
103
9.4
94
9.2
10.0
100
too
101
':'"" '"•' " 106
102
9.8
77
7.3
79
9 5
NA
7.3
68
1.4
1.6
1.6
1.4
1.3
1 4
i.4
1 4
1.6
1 5
1.4
1 4
1.6
2.7
2.7
25
2.4
38
NA ^ not analyzed
NS = not sampled
Shaded indicates concentrations excpedmg 'oWOS
Bold and italics indicales lhe MDL exceeded ihe GWOS
Isi Otr = January - Mr^rch
2nd Qtr ^ Apnl • June
3rii Qtr -^ July September
dth Otr - October - December
TABLE 1
HISTORIC SUMMARY OF MONfrORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Evenl
TW4-13
1st Qtr 3/16/06
2nd Qir 5/25/05
3rd Qtr 8/31/05
4th Otr 12/7/06
lsl Qtr 3/9/06
2nd Oir 6/14/06
3rd Qtr 7/20/06
4lh Otr 11/8/06
1st Otr 2/28/07
2nd Qtr 6/27/07
3rd Oir 8/15/07
4th Otr 10/10/07
1st Otr 3/28/08
2nd Qtr 6/25/08
3rd Qir 9/10/08
4lhQlr 10/15/08
ist Qir 3/4/09
2nd Qtr 6/23/09
TW4-14
lsl Qir 3/16/05
2'n'd Qtr 5/25/05
3rd Qtr 8/31/05
4th Qtr 12/7/05
lsl Qtr 3/9/06
2ndQtr6/i4/06
3rd Qtr 7/20/06
4th Qtr 11/8/06
lsl Qtr 2/28/07
2nd Qtr 6/27/07
3rd Qtr 8/15/07
41hQtr 10/i0/07
lsl Qtr 3/28/08
2nd Qir 6/26/08
3rd Otr 9/10/08
4ih Qtr io/16/08
1st Otr 3/4/09
2nd Qtr 6/23/09
TW4-16
lsl Qir 3/16/05
2nd Qtr 5/25/05
3rd Otr 8/31/05
4lhOlr 12/7/05
1st Qir 3/9/06
2nd Qtr 6/14/06
3rd Qir 7/20/06
4th Qir i 1/8/06
1st Qir 2/28/07
2nd Qtr 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
lsl Qtr 3/28/08
2nd Qir 6/25/08
iSrd Otr 9/10/08
4lhQlr 10/15/08
1 sl Otr 3/4/09
2nd Qtr 6/23/09
TW4-18
1st Qir 3/16/06
2nd Qtr 5/25/05
3rd Otr 8/31/05
4th Oir 12/7/05
1st Otr 3/9/06
2nd Qtr 6/14/06
3rd Qtr 7/20/06
4th Qtr 1 1/8/06
lsl Qtr 2/28/07
2nd Otr 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
lsl Qtr 3/28/08
2nd Otr 6/25/08
3rd Qtr 9/10/08
4lh Qtr 10/15/08
ist Otr 3/4/09
2nd Qtr 6/23/09
Carbon Tetrachloride
(5 pg/L)
NA
NA
d 0
cl 0
d'o
d b
d.O
ci.O
cl.O
d 0
dO
cl.O
dO
d.O
d'o
d.O
d.O
cl.b
NS
NSI
NS
NS
NS
NS
NS
d.O
cl.O
d 0
d.O
d 0
d.O
d.O
ci.O
d.O
d.O
d.O
NA'
NA
d.O
<yo
d 0
d.O
d.O
d.O
ci.O
d.O
d 0
d.O
d.O
d.O
d.O
d.O
cl.O
d.O
NA
NA
d.O
d 0
d.O
d.O
cl 0
cl 0
d.O
ci O'
d'o
d 0
d 0
cl 0
cl 0
d 0
cio
cio
Parameter
GWQS
Chloride
No GWQS
NA
NA
NA
69
67
66
65
33
59
59
68
58
54
58
50
58
58
57
NS
NS
NS
NS
NS
NS
NS
' 37
' 38
38
36
38
" 57
35
34
40
35
36
NA
NA
NA
64
60
55
60
62
79
76
66
69
52
58
"71
89
73
76
NA
NA
NA
41
36
35
35
34
30
28
' 32
27
23
23
26
' 30
29
30
Chloroform
(70 pg/L)
cl 0
cl.O
d 0
d 0
d 0
dO
d 0
ClO
cl.O
d.O
d 0
d.O
d.O
d.O
d.O "
d.O
cl 0 '
d.O
NS
NS
NS
NS
NS
NS
NS
NS
cIO
cl 0
cl 0
d.O
d.O
d.O
d.O
d.o""
d.O
dO
240
212
85
14
39
13
52
136
87
26
71
14
11
d.O "
10
39
d 0
d.O
38
29.8
39
14
12
12
108
12.5
9.2
8
89
74
64
57
8
9.4
1 1
16
Chloromethane
(30 pg/L)
NA
NA
31
d.O
1 7
i 4
d.O
cl 0
d.O
dO
d 0
cl 0
d 0
cl.O
d 0
ClO
cl.O
d.O
NS
NS
NS
NS
NS
NS
NS
cl.O
ci b
cl 0
d'o
cl 0
cl 0
d 0
dO
ClO
cl 0
cl.O
NA '
NA
32
26
1 1
24
cl.O
d.O
d.O
d.O
cl 0
ci.O
ci 0
d.O
d 0
d 0
d 0
cl 0
NA
NA
28
1 1
1 6
2 7
d.O
d.O
d.O
d 0
d'o
d.O
d 0
cl 0
cl 0
d 0
ClO
cl 0
Methylene Chloride
1 (5 pg/L)
NA
NA ;
d.O '
d 0
d 0
d 0 •
d 0
d 0
d.O
d 0
cl 0
cl 0
cl 0
cl.O
cl 0
cl 0
cl 0 :
d.O
NS '!
NS
NS
NS
NS
NS
NS
d.O
cl 0
cl 0
d.O
d.o:
cl 0
d.O "
d 0
cl b i
d 0
d.O
NA"
NA
cl q
cl 0
d.O
NA
NA
cl.O
cl.O
cl.O
cl.O
d.O
d'o
d.O
cl 0
cl.O
cl 0
d 0
cl 0
cl.O
cl 0
d.O
d.O
43
• 5.9
21
8.9
2.7
92
6.6
1.8
5.1
1
26
14
6.6
Nitrate, Nitrate +
(10 mg/L)
... .
NS
NS
NS
NS
NS
NS
NS
cOI
cOl
<0.1
.-
Nitrite
42
43
4 6
43
42
49
4 3
08
4.0
4.6
4.4
4 1
38
42
43
46
37
1 2
2.4
23
1.4
1.1
08
' 04
1 6
1 38
076
1.6
1.4
1.4
3
1 9
27
5 6
123
99
64
4 4
cO 1
1 6
.10 5
9 82
96
89
.14.1
-. 12.9
13.3
7.3
5.9
4 7
61
57
5 1
4.9
5
44
0 7
46
4.86
5 15
5.2
62
NA = not analyzed
NS ^ not sampled
Shaded indpcates concentrations exceeding GWQS.
Bold and italics 'ndcales (he MDL exceeded lhe GWOS
1st Qir - January - March
2nd Qir = April June.
3rd Otr = Jtjly September
4th Oir = October - Dec:ember
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
IWell
Sampling Event
TW4-19
lsl Qtr 3/16/05
2nd Qtr 5/25/05
3rd Qtr 8/31/05
km Qtr 12/7/05
lsl Otr 3/9/06
2nd Oir 6/14/06
3rd Qir 7/20/06
4th Qtr 11/8/06
lsl Ou 2/28/07
2nd Otr 6/27/07
3rd Otr 8/15/07
41h Qir 10/10/07
1st Qir 3/28/08
2nd Oir 6/25/08
brdOlr 9/lOiOB
4th Qtr 10/15/08
lsl Qtr 3/4/09
2nd Qtr 6/23/09
TW4-20
1st Qtr 3/16/05
2nd Qtr 5/25/05
3rd Qir 8/31/05
UlhOlr 12/7/05
1sl Otr 3/9/06
2nd Qtr 6/14/06
3r(l Qtr 7/20/06
4lh Qtr 11/8/06
Isi Qtr 2/28/07
2nd Otr 6/27/07
3rd Qtr 8/15/07
4th Qir 10/10'07
1sl Otr 3/28/08
2nd Qtr 6/25/08
3rrl Otr 9/10/08
41h Otr 10/15/08
lsl Otr 3/4/09
2nd Qir 6/23/09
TW4-21
lsl Qtr 3/16/06
End Otr 6/25/05
3rcl Qtr 8/31/05
4th Qtr 12/7/06
1st Qtr 3/9/06
2nd Qtr 6^14/06
3rd Qtr 7/20/06
4th Qtr 1 1/8/06
1st Otr 2/28/07
2nd Otr 6/27/07
3rd Otr 8/15/07
MlhOtr 10/10/07
lsl Otr 3/28/08
2nd Qtr 6/26/08
3rd Qtr 9/10/08
4inQlr 10/15-08
41hQlr 11/18/09
lsl Qtr 3/1 1/09
2nd Oir 6'23/09
TW4-22
1 Sl Qtr 3/16.05
2nd Otr 5/25/05
3rd Otr 8/31/05
4lh Qir 12/7/05
1st Oir 3/9/06
2n(JQlr 6/14/06
3rd Qir 7/20/06
UlhQlr 11/8/06
lsl Otr 2/28/07
2nd Qtr 6/27/07
3rcl Otr 8/15/07
4lh Qtr 10/10/07
Tst 01/3/28/08
2nd Oir 6/25/08
3r.-| Otr 9/10/08
4th otr 10/15/08
4lh Otr 11,18/09
lsl Qtr 3/11/09
pnd Qir 6/23/09
Carbon Tetrachloride
(5 pg/L)
NA
NA
C.5 0
c5D
<50
<50
<S0
d 0
6.6
12
1 2
1 2
NA
<10
<250
<S00
<S00
<1000
NA
5.7
4.9
NA
c50
d 0
c2 6
c2 6
c2 5
cl 0
cl 0
NA
2
d 0
d 0
NA
c5 0
c5 0
dO
<10
<10
cl 0
cl 0
cl 0
d.O
cl 0
d.O
cl 0
1 3
NA
c20
. 1 0
d 0
1.6
1.3
Chloride
No GWQS
NA
NA
NA
81
86
116
123
134
133
1.9
1.9
2.9
129
132
131
128
113
124
127
132
7.
3.1
2.2
35
68
9
13
15
NA
NA
2
1 8
58
7
1.7
1.6
NA
NA
NA
NA
NA
NA
13
120
235
134
124
124
112
117
170
132
19
156
168
164
164
353
347
318
357
296
306
327
300
288
331
271
244
284
279
291
253
236
221
221
236
347
273
259
238
519
27
524
539
177
177
Parameter
GWQS
Chloroform
(70 pg/L)
2.200
1,200
1.400
2,800
1,200
1,100
1,120
1,050
1.200
Chloromethane
(30 pg/L)
NA
NA
c5.0
c50
<S0
<so
<50
2.6
cl 0
Methylene Chloride
(5 pg/L)
NA
NA
c5 0
<S0
<50
<50
<50
d.O
d.O
Dirl nol sample
1.100
1.100
1.800
1.000
3,600
4,200
1,100
990
d.O
cl.O
cl.O
d.O
d.O
cl.O
d 0
cl.O
cl 0
cl.O
d 0
d 0
cl 0
cl 0
d 0
d.O
Monitor v^etl was not installed
39,000
3,800
19,000
9,200
61.000
5.300
11.000
4.400
1,800
5,200
9,000
13,000
.30,000
21,000
NA
8,200
6,800
NA
ClO
<250
<500
<S00
<1000
1 9
d 0
d.O
cl.O
cl 0
d 0
d.O
cl 0
NA
cl 0
d 0
NA
<10
<250
<S00
<S00
<1000
22
1 1
d 0
1.8
1 9
1.5
1 2
37
NA
52
42
Monitor weW was not installed
192
78
86
120
120
108
139
160
300
140
120
390
180
120
NA
.170
180
200
NA
c5.0
d.O
c2.5
<2.5
c2.5
d 0
d 0
cl 0
cl 0
d 0
cl 0
cl 0
d.O
NA
c2.0
d 0
cl 0
NA
c5 0
d.O
c2.5
c2 5
c2 5
d 0
d 0
cl 0
d.O
d 0
d.O
d.O
cl 0
NA
c2 0
cl 0
d 0
Moniior well was not installed
340
290
320
390
280
864
350
440
740
530
440
1400
1200
6300
NA
630
390
730
NA
c50
c5 0
dO
dO
ClO
1.6
cl 0
cl 0
cl 0
d 0
cl 0
d 0
d 0
NA
c2.0
d.O
d.O
NA
c5 0
c50
<10
<w
<10
d.O
d 0
d.O
cl.O
cl 0
cl 0
d 0
cl 0
NA
c2 0
cl 0
d 0
I
Nitraie, Nitrate + Nitrite j
(10 mg/L)
5 3
5 7
4 6;
cOl
4
5 2
4
4
4.
2
2
35.
47
3
2 4
10
2 9
1 sl
3 8l
9.4
2 9
3 5
4.2
23
2 1
56
09
8-
4.44I
551
6 1
2 9l
14.5
101
9 6
8 5
102
8 9
8 7
8 7
86
86
83
14.3
88
7 57
8
NA
8 3-
8 1
18.2!
15 7''\
15 1
15 3:
14 3
14 5
15
20
19
19.
18.
39.
41.9
38 7
36 3
NA
20 7
20 6|
NA ^ nol anaiy^eo
NS = nol -sampled
SMHLleil iniii(L.,Tle^ (inncenuEilions exceeding GWOS
Boiri Hnri Italics iixii'-aiei- iho MDL exieeded liie GWQS
Itl Qtr ^ Jdnuarv M^rch
L'nii Qu ^ Apr''. June
'^r'\ Otr = July Seijlemtier
4lti Qtr -r Otjiol'er LieceiTiber
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Evenl
rW4-23
2nd Qir 6/27/07
3rd Qtr 8/15/07
4th Qtr 10/10/07
1st Qtr 3/28/08
2nd Oir 6/26/08
3rd Qtr 9/10/08
4th Qtr 10/15/08
41hQtr 11/18/09
1st Qir 3/4/09
2nd Qir 6/23/09
TW4-24
2nd Qtr 6/27,07
3rd Otr 8/15/07
41hQlr 10/10/07
lsl Qtr 3/28/08
2nd Qtr 6/25/08
3rd Otr 9/10/08
4th Oir 10/15/08
4th Otr 11/18/09
lsl Otr 3/4/09
2nd dtr 6/23/09
TW4-25
2nd Otr 6/27;07
3rd Otr 8/15/07
4th Oir 10/10/07
lsl Qtr 3/28/08
2nd Otr 6/25/08
3rd Qtr 9/10/08
4th Otr 10/16/08
4th Qtr 11/18/09
lsl Qtr 3/4/09
2nd Qtr 6/23/09
Carbon Tetrachloride
(5 pg/L)
dO '
cl 0
ClO
cl 0
ClO
ClO
NA
c2 0
d.O
cl 0 "
d 0
cl 0
dO
do'
cl 0
d 0
NA
c2 0
d 0 '
d 0
d.O
cl 0
cl 0
d 0
cl 0
cl 0
NA '
c20
cl 0
cl 0
Parameter
GWQS
Chloride
No GWQS
47
46
43
41
41
35
' 51
NA
' 41
43
770
791
692
740
834
1180
1130
NA
1010
759
395
382
358
374
344
333
366
NA
332
328
Chloroform
(70 pg/L)
d.O
d.O
d 0
d 0
d 0
d 0
NA
c2 0
d 0
ClO
2.6
2.2
1.5
1.5
1.4
2.9
NA
c2 0
1.4
1.6
d.O
22
d 0
d 0 ' '
d 0
d 0
NA
c2 0
d 0
dO
Chloromethane
(30 pg/L)
dO
cl.O
d 0
d.O
d.O
d.O
NA
<2.0
d.O
d.O
d.o'
d.o' '
d.O
dO
d.O
cl.O
NA
c2 0'
d.O
d.O
d.O "
d.O
d.O
d.O
d.O
d.O
NA
<2.0
dO
d O'
Methylene Chloride
(5 pg/L)
cl.o
d 0
d 0
dO
dO
dO
NA
c2 0
d.O
d.O
d 0
d 0
d 0
d 0
d 0
d 0
NA
c2 0
d.O
dO
d.O
d.O
d.O
d.O
d.O
cl.O
NA
<2.0
d 0
d.O
Nitraie, Nitrate +
(10 mg/L)
cO 1
cOl
cO 1
cOl
cO 1
c0 05
c0 05
NA
cO 1
cO 1
NA
NA
1
Nitrite
.26 1
..- 2?
'24 7
.24 4
. -45 3
. ,. 38.4
' 44 8
. 305
: .. 30.4
17.1
29
17
:i8.7
22.1
. 18.8
- 21.3
15.3
• 15.3
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 2nd QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Evenl
Carbon Tetrachloride
(5 pg/L)
TW4-60 (Dl Blank)
IslQtr 3/16/05
2nd Qir 5/25/05
3rd Qtr 8/31/05
4lhQtr i2/7/05
lsl Qtr 3/9/06
2'nd Qtr 6/14/06
41hQtr 11/8/06
lsl Qtr 2/28/07
2nd Qtr 6/27/07
3rd Qtr 8/16/07
4th Qir 10/10/07
lsl Qtr 3/28/08
2nd Qir 6/25/08
3rd Qtr 9/8/08
lsl Qtr 3/3/09
2nd Otr 6/23/09
TW4-62
lsl Otr 3/3/09
2nd Qtr 5/25/05
3rd Qtr 8/31/06
4lh Qtr 12/7/06
lsl dtr 3/9/06
3rd Otr 7/20/06
IslQtr 2/28/07
2nd Qtr 6/27/07
3rd Otr 8/15/07
4lhOtr 10/10/07
lsl Otr 3/28/08
2nd Qtr 6/25/08
3rd Otr 9/8/08
lsl ar 3/3/09
NA
NA
d.O
cl 0
d.O
ci.O
d.O
d.O
d.O
ci.O
ci.O
d.O
d.O
d.O
cl.O
d.O
Chloride
No GWQS
NA
NA
NA
cl 0
cl.O
cl.O
d 0
d.O
d 0
cl 0
cl.O
cl.O
cl 0
cl.O
cl 0
cl o'
Parameter
GWQS
Chloroform
(70 pg/L)
cl.O
cl.O
d.O
cl 0
cl.O
d.O
Cam find reason lor TW4-62 in levied
d.O ClO
NA NA
<2S
<100
<50
<S0
d.O
d.o
d.O
d.o
d.o
d.O
d 0
d 0
TW4-63 (Rinsate)
2nd Qtr 6/23/09 |c1 0
TW4-65 (dup of TW4-3)
3rd Qir 9/10/08 |d.O
rW4-65(dupofTW4-5)
4th Otr 11/8/05 |<1.0
TW4-65 (dup of TW4-20)
4th Qir 11/8/06
1st Qir 2/28/07
2nd Qtr 6/27/07
3rd Qir 8/15/07
4th Qir 10/10/07
1st Qir 3/28/08
• 9.7
•'8.3
1 9
':'• • '•• -19
32
82
rW4-65 (dup of MW-32 former TW4-17)
2nd Otr 6/26/08
lsl Otr 3/4/09
2nd Oir 6/24/09
d.O
cl 0
d.O
TW4-70(dupofTW4-2)
lsl Qtr 3/4/09 |2.1
rW4-70 (dup ol TW4-8)
2nd Oir 6/25/08 d.O
2nd Oir 6/24/09 d.O
TW4-70 (dup of MW-26 former TW4-15)
1st Otr 2/28/07
2nd Qir 6/27/07
3rd Otr 8/15/07
4th Otr 10/10/07
d 0
d 0
d 0
d 0
TW4-70 (dup of MW-32 former TW4-17)
1st Otr 3/28/08
3rd Oir 9/10/08
TW4-73
3rd Otr 9/9/08
TW4-73
1st Qtr 3/10/09
d 0
d.O
NA
51
52
48
cl 0
d 0
d 0
cl 0
cl 0
dO
cl 0
cl 0
cl.O
18
56
125
139
125
137
176
137
29
31
26
44
46
41
55
53
61
58
31
31
ct 0
d.O
d 0
cl 0
cl 0
d.O
3100
d.O
cl.O
d.O
d 0
Cant find reason lor TW4 73 in texted
<10 |cl 111
Cant lind reason lor TW4 73 in texted
dO |c1 |19
37.6
27
25
190
57
1 i
13
3
33
3.5
34
3.500
3,100
3;200
3.300
2,800
20
50
i
1 5
3
10
4 7
53
13,700
16,000
1,700
27,000
3,600
12,000
41
400
440
1,700
Chloromethane
(30 pg/L)
NA
NA
24
d 0
1.5
1.1
1.3
dO
d 0
cl 0
cl.O
d.O
d.O
d.O
d.O
d.O
d.O
NA
c25 '
<100
<so
<so
d.o
d 0
d 0
d 0
dO
14
dO
dO
d.O
dO
d 0
1.8
d 0
dO
d 0
cl.O
cl.O
d 0
d 0
d 0 "
dO '
<\0
d 0
d 0
d 0
cl 0
dO
d 0
d 0
cl 0
cl.O
Methylene Chloride
(5 pg/L)
NA
NA
dO
d 0
dO '
d 0
d 0
ci 0
cl 0
cl 0
d 0
d 0
cl 0 '
d 0
cl.O
1.4
d.O
NA
<2S
<100
<S0
<50
d.O
d.o
cl 0
d 0
ci 0
dO
dO
d 0
cl.O
d.O
d 0
2.2
1
d.O
d'o
22
1.2
d 0
d 0 '
cl.O
dO
cio
d 0
d.O
i8
cl 0
d.O
cl.O
cl.O
cl.O
d.O
Nitrate, Nitrate -f
(10 mg/L)
cO.1
cO 1
cOI
co.i
cO.'l
cO 1
c.1
c0 1
cO.i
cO'i
cOI
cOI
<O05
<0.05
cO. 05
cO.1
cao5
cOl
<01
<01
cO V
<0.b5
<ao6
cOI
<01
2.72
cO05
cOI '
cOI
7
ci'-.'b
cO.1
cO.1
cO05
cO.05
<0 05
Nitrite
102
68
66
62
5.4
0 1
67
' 'l 5
43
1.9
4
53
4.6
8.1
06
03
06
^,^__
NA rr not analyzed
NS r= not sampled
Shaded indicates concentrations exceeding GWOS
Bold and italics indicates the MDL exceeded ihe GWQS.
1 sl Qtr = January - March
2nd Qir = April - June
3rd Qtr = July - September
4th Qtr = October - December
(A
a
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CD 0-0 0 0-0 0: >.>^>,>.>^>^>^>^>^>.>l>,>.>.>^>.>^>^>^>,>^>,>,>,>^>l
cn cn to cn co en to co cn cn to cntn-tn cntncn mm m m- m to cn cn •-0-0 0 0 OJ 0 0 0-0-0 tD:0 0;(l> 0 0-0 0'0:0 0-0-0-0 0 >l>,>^>^>^>^>,>.>.>.>,>,>^>,>^>^>,>v>.>.>^:>^>^>^>'
mmmmmmmmmmmmmmmmm: mmmmmmmmm
00000000000(1>0000000. 0000000
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mmmmmmmmmmmmm mmmmmmmmmm.mm 0000000000000000000000000 >v>,>,>^>.>v>.;>->.>^>.>.>v>,>,>-.>->,>>>,>,>-.>i>,>J
ig 2
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ggggggggggggggggPn
I- h- H h- 1- I- I- I- I- H I- I- I- l-l- I- ; ;
CVJ CXJ
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<2 E
Attachment 2
DUSA 2"" Quarter 2009 Groundwater Contour Map
Peel 1993 Groundwater Contour Map
DUSA 2"° Quarter 2009 Groundwater Contour Map
"i^-
•^
MW-20
# 5460
O -555.;
PIEZ-1
9 5593
MW-31
-^5547
^=i^41
EXPLANATION
parched monitoring wall showing
elevation in fsel amsl
temporary perched monitoring well
showing elevation in feet amsl
perched piezometer showing
elevation in leet amsl
perched monitoring well installed April, 2005
showing elevation In feet amsl
temporary perched monitoring well installed
April, 2005 showing elevation in feet amsl
temporary perched monitoring weU installed
May, 2007 showing approximate elevation
m feet amsl
NOTES: Locations and «levatlona for TW4-23, TW4-24, and TW4-25 are approximate
.^fi
'-§^/.^
HYDRO
GEO
CHEM, INC.
KRIGED 2nd QUARTER, 2009 WATER LEVELS
WHITE MESA SITE
APPBOVEO
SJS
REFEREMCE
H •J7^ 8000/aug09Awl0609.srf
Peel 1993 Groundwater Contour Map
R22E
Phreatic Surface of the Ground Water in the Burro Canyon Formation
Beneath the White Mesa Mill Site.
Figure 5.2 .2 -1
Attachment 3
tnd DUSA Chloroform Isoconcentration Map for the 2 Quarter 2009 Monitoring Event.
O 'SOO
PlEzi
9 MS
MW-32
•^ r-tD
KlV:^tifi
temporary perched monitoring well
showing concentration in uG/1
perched piezometer (not sampled)
perched monitoring weU installed April, 2005
showing concentration in uG/l
temporary perched moniloring well installed
April, 2005 showing concentration in uG/l
temporary perched monitoring well Installed
May, 2007 showing concentration in uGl
NOTES: ND <= not detected, NS » not sampled
M^ HYDRO
GEO
CHEM, INC.
KRIGED 2nd QUARTER, 2009 CHLOROFORM (uG/L)
WHITE MESA SITE
APPHOVEO
SJS
DATE FfEFfflEHCC THflGlinF
H:/718000/aug09/chl0609c.srf
Attachment 4
DRC Chloride and Nitrate Isoconcentration Map
MW-1 .,
16 ® "^
White Mesa Site IVIap
ofthe Nitrate and Chloride
Plumes for the 2nd Quarter 2009
Samping Event
34
MW-19^
370TW4-5
30 2.3 0"rW4-9
feT2 "rW4-''°'™'45^ TW4-12
IW4-1144 6 4 TW4-13 44 O TW4-S O
3 8TW4-7C* OTW4.8 ° MW-4 ^ii'O
TW4-23 43 0=0.1
,"rW4.4., 14 34 O 8 2 •rW4-14 O 36
TW4-6
37<3 2.7
MW-17 36 ® 0.7
Wild Life
Ponds
60 54
MW-20
Scale (Feet)
1000 2000 3000 4000 5000
Legend
Monitoring Well With Nirtrate and
Chloride Concentrations mg/L
Chloroform Well O
Tailling Cell Monitor well ©
Piezometer 0
TW4-24
O
30.4
759
Leach Field i ]
58 3.4
MW-22
Attachment 5
2 Quarter 2009 Water Levels and Estimated Capture Zones White Mesa Site Map