DRC-2009-006104 - 0901a06880147b7a

State of Utah
JONM HIINT.SM.AN.JR.
(iovfn\ni'
(iAKY HERBERT
Department of
Environmental Quality
Amiinda Siiiiih
.-^iliri^- E.xcniiivt- Diiccior
DIVISION (JF R.'SiOlATION fONTKOL
Djni: L Fincrfiuck
Dm-dor
D^C'.^(fr^^'^'^'''i
MEMORANDUM
TO:
FROM:
DATE:
SUBJECT:
Loren Morton
Dean Henderson
November 4, 2009
Review of the 3''' and 4"^ Quaner 2008 and l" Quarter 2009 Chloroform
Monitoring Reports for the Chlorofomi Contaminalion Investigation
Dennison Mines (USA) Corp. (hereafter "DUSA'")
White Mesa Uranium Mili, near Bianding, Utah
This is a summary for the review of the 3^'' (hereafter •'CMR3") and 4'^ (hereafter CMR4")
Quarter 2008 and the 1''Quarter (hereafter CMR I") Chloroform Monitoring Reports, These
repoits are required as pan of the contamination investigation under the State of Utah Notice of
Violation and Groundvvater CoiTective Action Order Docket No. UGW20-01. Forthe review of
these reports, the following regulatory enforcement documents will be used:
• DUSA was issued Ground WaterQuality Discharge Pennit No. UGW370004 (hereafter
'Termit") on March 8, 2005; last revised on March 17, 2008.
• The DUSA Q)uality 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 CMR3, CMR4, and CMRl will be: 1) summary of apparent violations, 2)
CMR3- CMR4, and CMRl edits, 3) summary of parameters exceeding groundwaier quality
standards 4) cai'bon tetrachloride and Methylene chloride exceeding GWQS, 5) elevated chloride
concentrations and, 6) status and condition of the chloroform plume,
SUMMARY OF APPARENT VIOLATIONS
I. Decontamination procedures reported in the CMR3, CMR4, and CMRl did not follow
decontamination procedures required in Appendix ,\ and section 6.2.5 ofthe QAP.
KiH North !'J50 Wesi • SJII Lake Cily, UT
Mailing .'iLddress: P.O. Box I448JU • Sail Lnkc Citv. l.'T 84114-4850
Teleplione (801) :ri 36-42:^0 •Fn.t (801 J,T7i:i-4rW7 -TDD )80O :=l.'^6 4414
\\ WW di-q uliili.ii'rf
Pimtedon IOO* recvcied p;ir<'
Page 2
Decontamination procedures in Appendix A item I) state:
''Decontamination of All sampUng equipment will follow the decontamination procedure
outlined is section 6.2.5 ofthe QAP. "
Requiremenis in section 6.2.5 of the QAP are:
6.2.5 Decontaminarion Procedure
Ifa portable (non-dedicated) pump is to be used, prior to each sampling event, at the
beginning ofeach day during the sampUng event, and between each sampling location
(weU), decontaminate the portable (non-dedicated) sampling pump prior to its use for
purging or sampling u.sing 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 Eqmpment")
with a nonphosphatc detergent;
b) rinse the Sampling Equipmeni 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 to part of section 2.2.1(b) of CMR3, CMR4, and CMRl; "Before leaving the
Mill office, ihe pump and hose are rinsed with de-ionized ("DI") water. Mill personnel
then proceed to the first well which is the well indicating the lowest concentration of
chlorofonn based on the previous quarters sampling results ". Also, according to part of
section 2.2.2(a) of CMR3, CMR4, and CMRl: "The dedicated portable pump is
appropriately decontaminated prior to each purging event and a QA rinsate sample is
collected afier said decontamination but prior lo the commencement ofthe sampling
event." In this comment [2.2,2(a)] CMR3, CMR4, and CMR I did not reference the
decontamination procedure in section 6.2.5 or Appendix A ofthe QAP. Therefore it
appears that there decontamination procedure was as described in section 2.2.1(b) ofthe
CMR3, CMR4, and CMRl, Therefore, it is recommended that a notice of violation be
issued to DUSA in violation of section 6.2.5 and Appendix A of the QAP.
2. Field Data Worksheet for the 4"" quarter 2008 for well TW4-14 (provided in Tab B of
CMR4) recorded 6 gallons of waler purged wilh no recorded field parameters. Section 7.1
of the QAP requires, in part that:
"The Field Data Worksheet will contain the following information:
(Beginning with the lO^"" bullet)
• results of in-field measurements (pH, specific conductance, water temperature)
• redox potential (Eh) mea.surements
• turbidity measurements "
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 Chlorofonn
hivestigation that is utilized for groundwater .sampling under its groundwater discharge
permit, as set forth in the attached groimdwater discharge permit Quality Assurance Plan
(QAP), except as set forth below:" subsequent language in Appendix A has no exceptions
to recording field parameters as outlined in section 7.1 ofthe QAP.
Page 3
It is recommended that a notice of violation be issued to DUSA in violation of section 7.1
of the QAP.
3. No Field Data Worksheet found in the CMRl for well TW4-14, In section 6(0 of
Appendix A ofthe QAP requires that:
"6) Chlorofomi Investigation Repons
The Chloroform Investigation Reports will include the following information:
...f) Copies of DUSA field records, laboratory reports and chain of custody forms. "
It is recommended that a notice of violation be issued to DUSA in violation of section 6(0
of Appendix A of the QAP.
4. In the 3^*^ quarter 2008 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
dispo.sable bailer, made of inen materials, may he used. Ifa bailer is used, the
foUowing procedure will be followed:
(i) 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 carefid not to
allow the bailer to come in contact with the bottom sediment;
(iv) Afier the bailer isfidl, 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 ofuntU no more water can be retrieved. When the process is
finished for the well, the bailer will be di.sposed of; and
(\'i) 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 u.se the same sampling regimen for the Chlorofonn
Investigation that is utilized for groundwater sampling under its groundwater discharge
pennit, as set fonh in the attached groundwater discliarge permii Quality Assurance Plan
(QAP), excepi as set forth below:" subsequent language in Appendix A has no exceptions
to the well purging requirements outlined in section 6.2.7(e) ofthe QAP.
Paije 4
According to the comments recorded in field data work sheet forTW4-14 (found in under
Tab B ofthe CMR3). for sampling done on September 8, 2009 il appears purging was
attempted but field note state, "No purged produced". No additional explanation for not
purging this well was written in the CMR3. According to the water level measurement
below iand surface (hereafter "bis) for TW4-14 recorded under Tab K in the CMR3,
groundwater on this date was measured at 87.9 feet bis. And according to the well
completion details forTW4-l4 the well depth is 92.5 feet bis (HGC 2002). Therefore,
there was approximately 4.6 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. Therefore, it is
recommended that a notice of violation be issued to DUSA in violation of section 6.2.7(e)
of the QAP.
5. Contrary to Section 6.2.7(d)(v) of the DUSA QAP, DUSA failed to make and record
multiple field measurements to demonstrate parameter stability (+/- 10%) before water
quality sample collection in 20 monitoring wells for 3'^'^ Quarter 2008, 21 monitoring wells
for 4'^ Quarter 2008, and 20 monitoring wells for T^ Quarter 2009 chloroform monitoring
events. While the approved field worksheet included space for four (4) individual field
parameter measurements, in some cases none were recorded (3"^^ Quarter) 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 / Quarterly Monitoring
Event
TW4-1/3'''quaner 2008
4'^ quarter 2008
1" Quarter 2009
TW4-2/3''^quarter 2008
4'*^ quaner 2008
I''auarter'2b09 "
TW4-3/3''^ quarter 2008
4^%uarter2608
I''auai1er2009
TW4-4/3''^ quarter 2008
4''' quarter 2008
1'^ quarter 2009
TW4-5/3'''quaner 2008
4'^ quarter 2008
1'* Quarter 2009
TW4-6/3^ quarter 2008
" 4'^ quarter 2008
1''Quarter 2009
TW4-7/3''^ quaner 2008
' 4"'quarter 2008
P'Quarter 2009
TW4-8/3'^ quarter 2008
Volume Purged (gallons)
66
66
66
66
66
66
66
66
66
66
66
66 ' ""
90
84
84
36
36
36
72
66
66
72
Volume When Field
Parameters Where Measured
(gallons)
Not recorded
36
42
Not recorded
36
42
30
30
36
Not recorded
35
24
Not recorded
48
60
Not recorded
18
18
Not recorded
"36
36
24
Page 5
4"' quarter 2008
1''"quarter 2009 '
TW4-9/3'''quarter 2008
4'^'qua'rter 2008"
[''quarter 2009
TW4-I0/3'"quarter 2008
4'^ quarter 2008
["quarter 2009
TW4-1I / 3''quarter 2008
4"'quarter 2008
1" quarter 2009
TW4-12/3''quarter2008
' 4'^ quarter 2008 ~
[''quarter 2009
TW4-l3/3''quarter2008
4'^ quarter 2008
1" quarter 2009
TW4-14/4'" quarter 2008
TW4-16/3''quarter 2008
4"^ quarter 2008
['* quarter 2009
TW4-18/3'^ quaner 2008
4'"'quarter 2008
[''quarter 2009
TW4-21/3'^ quarter 2008
4^''quarter 2008
1'^ quarter 2009
TW4-22/3'^ quarter 2008
4^'^ quarter 2008
P'quarter 2009
TW4-23 7 3'''quarter 2008
4'^ quarter 2008
1" quarter 2069"
TW4-24/y''quarter 2008
4"'quart'er'2008
P'quarter 2669
TW4-25/3'^ quarter 2008
4"^ quarter 2008
r'quarter 2009
72
72
84
90
84
78
78
72
48
48
54 ""' ""
84
84
84
72
72
72
6
102
io2 "
96
108
108
102
84
84""
84
78
78
78
72
72
78
84
84
84
120
120
120 '" "
36
42
24
42
42
Not recorded
42
36
Not recorded
24
30
42
84
60
24
24
36
Not recorded
42
48
54
48
66
72
Not recorded
48
48
Not recorded
48
48
30
36
42
60
42
84
36
72
120
Section 6.2.7(d)(v) 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 he recorded 07i the Field Dala
Worksheet. Purging is completed after two casing volumes have been removed and the
Page 6
field parameters pH, temperaiure, specific conductance, redox potential (Eh) and turbidity
have .stabilized to within 10% over at least two consecutive measurements. "
Tn the second paragraph in the first page of Appendix A of the QAP it states:
"Specifically, the mill will use the same sampUng regimen for the Chlorofonn
Investigation that is utUized for groundwater sampling under its groundwater discharge
pennit, as set forth in the attached groundwater discharge pennit Quality Assurance Plan
(QAP), except as .set fonh below:" subsequent language in Appendix A has no exceptions
to 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 D of the CMR3, CMR4, and
CMRl) although 2 casing volumes of water were purged from each well, only one set of
field parameter measurements were measured and recorded. The field parameters were
measured prior to completion of purging the required two casing volumes (see Attachment
I, Table 4 for each ofthe CMR3, CMR4, and CMRl reviews below). Therefore, because
DUSA only made one set of measurements, they are unable to demonstrate that the field
parameters stabilized to within 10% over at least two consecutive measurements.
Therefore, it is recommended that DUSA be cited under Appendix A and section 6.2.7(v)
of the QAP, for failure to make multiple field measurements and record them.
6, In the 4"^ quarter 2008 sampling event only one duplicate sample (TW4-65 a duplicate
sample of TW4-32) was collected instead ofthe two duplicate samples required as defined
in section 4.3.3 of the QAP (see item 6 in inspection forms for the 4'^ quarter 2008 in
Attachment 1):
"4.3.3 Field Duplicates
One Duplicate set of samples submitted with each Batch (defined in Section 4.3.4) oflhe
samples (DTG, Field and Laboratory QuaUty Assurance/Quality Control, 7.8). taken from
(me ofthe wells being sainpled and will be submiited to the Analytical Laboratory and
analyzed for all conlaminants listed in Table 2 ofthe GWDP (EPA SW-846, Chapter I.
Section 3.4.1).
4.3.4 Definition of "Batch "
For the purposes ofthis Plan, a Batch is defined as 20 or fewer .samples (PA SW-846,
Chapter 1. Section 5.0, page 23). "
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 thai is utilized for groundwater sampling under its groundwater discharge
pennit, as set forth in the attached groundwater discharge permit Quality As.surance Plan
(QAP), except as .set fonh below:" subsequent language in Appendix A has no exceptions
to the number of duplicate sample(s) requirements outlined in section 4.3.3 of the QAP.
In the 4^*^ quarter 2008 sampling event DUSA sampled 26 monitor wells. According to the
requirements in section 4.3.3 of the QAP DUSA was required to collect two duplicate
samples. Instead DUSA collect only one. Therefore, It is recommended that a notice of
violation be issued to DUSA in violation of section 4,3,3 ofthe QAP.
Page 7
7 In third bullet of section 6(b) in Appendix A ofthe QAP DUSA is required to report:
• Identify all cjuality assurance samples, e.g. trip blanks, equipment blanks,
duplicate samples"
Contrary to this requirement results for the samples with the identification of TW4-62 and
TW4-73 in Energy Laboratories analytical summary report was not identified, mentioned
or explained in the text of the CMRl. Therefore, it is recommended that a notice of
violation be issued to DUS.A in violation of Appendix A, section 6(b) of the QAP.
8. In third bullet of section 6(b) in Appendix A of the QAP DUSA is required to report:
• ^Tdentify all quality assurance samples, e.g. trip blanks equipment blanks, duplicate
samples."
In the 3'"^ quarter 2008 monitoring event there was no trip blank analyzed. Provided under
tab G in CMR3 is the Energy Laboratories analytical summary report. The Case Narrative
for this report, stated: "Trip Blank lost due to instrument malfunction". DUSA did not
mention or address the Trip Blank loss in the CMR. Therefore, it is recommended that a
notice of violation be Issued to DUSA in violation of Appendix A, Section 6(b) of the
QAP.
9. Section 4 in Appendix A of the QAP requires:
4) Laboratory Requirements
Collected satnples which are gathered for chloroform investigation purposes are delivered
to an outside laboratory where the requisite analyses are perfonned. At the laboratory the
following analytical .specifications must be adhered to:
Analytical
Parameter
Nitrate & Nitrite (as
N)
Carbon Tetrachloride
Chloroform
Dichloromethane
(Methylene Chloride)
Chlorotnethane
hiorganic Chloride
Analytical
Method
E353.2
SW8260B
SW8260B
SW8260B
SW8260B
A4500-CLB
Reporting
Limit
O.I mg/l
I.O p g/l
I.Opg/l
1-Opg/l
I.Opg/l
1 mg/l
Maximum
Holding
Times
28 days
14 days
14 days
14 days
14 da\s
28 days
Sample
Presen'ation
Requirement
H2SO4 to
pH<2
HCL to pH<2
HCLtopH<2
HCLtopH<2
HCLlopH<2
None
Sample
Temperaiure
Requirement
<^''C
<J5X
<6''C
<6''C
<6''C
<6''C
Contrary to this requirement the sample for monitor well TW4-20 was not analyzed
Carbon Tetrachloride, Chloroform, Dichloromethane (Methylene Chloride), and
Chloromethane. In section 3.3.3(a) of CMR4 DUSA explained:
PasJe8 *c
"On a review of adherence by Mill personnel to the sampUng procedures summarized in
Section 2.2 above, the QA Manager concluded that such procedures had been followed,
however, well TW4-20 was errantly not sampled for organic analytes. More .specifically, a
set of .samples, including well TW4-20 was sampled in October but did nol meet the
temperature specification for VOC .sample receipt and required re-sampling. Due to an
inadvenent error the .sampling personnel mis.sed re-collection of well TW4-20 for VOC's
when the re-sampling of these wells occurred. "
It is recommended that a notice of violation be issued to DUSA in violation of Appendix
A, Section 4 of the QAP,
10. Part of section 6(c) of Appendix A (item 3 of the first bullet) requires: "3) deplh lo
groundwater mea.sured and groundwater e leva Hon from each monitor well summarized in
a data table, that includes historic groundwater level data for each well, "
Contrary to this requirement CMR3, CMR4, and CMR I failed to provide historic
groundwater level data for wells TW4-23, TW4-24, and TW4-25. Therefore, it is
recommended that a notice of violation be issued to DUSA in violation of Appendix A,
Section 6(c) of the QAP.
11. Part of section 6(c) of Appendix A (item 3 in the second bullet) requires the quarterly
chloroform report to include:
3) Analytical results for each well simimarized in a data table, that includes historic
atialytical results for each well. "
Contrary to this requirement DUSA failed to provide historic analytical results and
summary data tables for all analytes in each well. While such data tables were provided
for nitrate + nitrite (as N) and chloroform, no information was provided i.e., carbon
tetrachloride, chloride, chloromethane, and methylene chloride in the 3^^^ Quarter Report,
4'^ Quarter Report, and T' Quarter Report.
12. Part of section 6(c) of Appendix A also requires the quarterly chloroform report to include
a cunent isoconceniration map that illustrates the 70 pg/l boundary.
Contrary to this requirement, CMR3, CMR4, and CMRl failed to include a cunent
chloroform isoconcentration map with a 70 pg/1 boundary, and instead provided an 80
pg/L isoconceniration boundary. Therefore, it is recommended that a notice of violation
be issued to DUSA in violation of section 6(c) of the QAP.
13. Part of section 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 chlorofonn mass removed for each pumping well, 3) total
chlorofonn tnass removed for the quarter and, 4) total chloroform mass removed form
each pumping well for the quarter."
Page 9
Contrary to this requirement, the CMR3, CMR4. and CMR I provided no calculated
chloroform mass removal by the pumping weils whatsoever. Therefore, it is recommended
that a notice of violation be issued to DUSA in violation of section 6.(c) of the QAP.
CMR3, CMR4, AND CMRl EDITS
1. In section 2.1.1 of CMR3, CMR4, and CMR I lists the chlorofonn monitoring wells that are to
be sampled. This list needs to be updated with the following information to reflect current list
of monitor wells that are to be sampled as part ofthe chloroform contamination investigation:
• Well TW4-A has been abandoned needs to be removed from the list.
• 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 to be added to the lisl of required wells to be
sampled.
2. In the table below, shows a discrepancy between the total well depths recorded in the as-built
wel! diagrams (HGC 2002) and total well depths recorded in the tables forthe historical
groundwater depths recorded in Tab K forCMR3, andTabG forCMR4, and CMRl .
Weli
TW4-10
TW4-n
TW4-12
TW4-I3
TW4-I4
TW4-I6
TW4-I8
TW4-19
MW-32
Total Well Death Recorded in
the As-built Well Diagrams
(HGC 2002)
110
no
IOI
102.5
92.5
142
132.5
137.5
125
Total Well Depth Recorded in
the Historical Tables in
CMR3, CMR4, and CMRl
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 corrected.
SUMMARY OF PARAMETERS EXCEEDING GROUNDWATER QUALITY
STANDARDS (hereafter "GWQS")
Four compliance monitoring parameters exceeded (see Table below) their respective groundwater
quality standards (hereafter "GWQS") in the 3"^, and 4"* 2008, and 1'' quarter 2009 monitoring
events. These parameters are summarized in the table below [see Table I ofthe inspection forms
In Attachment 11.
Page 10
Monitoring
Event
3rd Quarter 2008
3"'* Quarter 2008
Monitoring Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform (70 [ig/L)
Methylene Chloride
(5 Mg/L)
Nitrate, Nitrate -H
Nilriie(10mg/L)
Wells Exceeding GWQS
TW4-19 and TW4-20
MW-4, MW-26, TW4-1, TW4-2,
TW4-4, TW4-7, TW4-10, TW4-11,
TW4-t9, TW4-20, TW4-21, and
TW4-22.
MW-26 and TW4-16
TW4-19. TW4-22, TW4-24, and
TW4-25
Monitoring
Event
3rd Quarter 2008
4'^ Quarter 2008
Monitoring Parameter
(GWQS)
Carbon Tetrachloride
(5 pg/L)
Chloroform (70 pg/L)
Methylene Chloride
(5 pg/L)
Nitrate, Nitrate +
Nitrite (10 mg/L)
Wells Exceeding GWQS
TW4-19
MW-4, MW-26, TW4-1, TW4-2,
TW4-4, TW4-7, TW4-10, TW4-11,
TW4-19, TW4-21, and TW4-22.
MW-26 and TW4-16
TW4-19, TW4-22, TW4-24, and
TW4-25
1'* Quarter 2009
Monitoring
Event
3rd Quarter 2008
Monitoring Parameter
(GWQS)
Cai'bon Tetrachloride
(5 pg/L)
Chlorofomi (70 pg/L)
Methylene Chloride
(5 pg/L)
Nitrate, Nitrate +
Nitrite (10 mg/L)
Wells Exceeding GWQS
TW4-20
MW-4, MW-26, TW4-1, TW4-2,
TW4-4, TW4-6, TW4-7, TW4-10,
TW4-11, TW4-19, TW4-20, TW4-21,
andTW4-22.
MW-26 and TW4-16
TW4-4, TW4-10, TW4-19, TW4-22,
TW4-24, and TW4-25
Note: Wells in bold type MW-4, MW-26, TW4-19, and TW4-20 are pumping wells.
Pase
Chl orofoiTn - 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
chloroform. Therefore, other than addition conective action described below for the
location at well TW4-6, no additional conective action is recommended.
Nitrate. Nitrate -\- 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 at the mill site on or before January 4, 2010. Therefore, no
conective action is recommended at this time.
Carbon Tetrachloride and Methylene Chloride - the presence of both of these groundwater
contaminants on the DUSA site has been long known. Recent concentrations trends for
both are discussed below.
CARBON TETRACHLORIDE AND METHYLENE CHLORIDE EXCEEDING GWQS
Carbon Tetrachloride (hereafter "CTC") - CTC exceeded the GWQS (5 pg/L) in pumping wells
TW4-19 and TW4-20 (see Table 1 for the inspection forms for the T' quarter 2009 monitoring
event in Attachment 1). CTC in TW4-19 was reported at 8.6 pg/l, which exceeded the GWQS in
the 3^'^ quarter 2008 monitoring event. Beginning with the 4"^ quarter 2007 monitoring event
TW4-20 CTC exceeded the GWQS in the last four consecutive monitoring events. An increasing
concentration trend Is also apparent with contaminant levels rising consistently during this time
from 6.8 to 15 pg/1. However, DRC staff believe no further conective action is needed for this
problem, since: 1) CTC is a common co-contaminant of chloroform and 2) CTC, at this time, is
only found In pumping wells TW4-19 and TW4-20 where it is currently being remediated by
hydraulic capture by the pumping system. However, when the conective action plan (hereafter
"CAP") for the chloroform contamination investigation 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 wells pumping well
MW-26 and monitoring well TW4-16 (see Table 1 for the inspection forms for the T' quarter
2009 monitoring event in Attachment 1).
Beginning with the I" quaiter 2007 monitoring event MC in MW-26 has exceeded the GWQS in
the last seven consecutive monitoring events and shows an apparent increasing trend (see Figure
3. below). No additional conective action is needed for well MW-26 since it is a pumping well
used for hydraulic capture of the chloroform contamination.
Beginning with the 3'^ quarter 2005 monitoring event MC in TW4-I6 has exceeded the GWQS in
eight of the last thirteen monitoring events and shows a decreasing trend (see Figure 4, below).
Because: 1) downgradient wells MW-31 and MW-32 from TW4-16 have historic non-detectable
(<!.0 pg/1) concentrations of MC, 2) the MC concentrations show a decreasing trend (see Figure
4), and 3) in 5 of the last 11 monitoring events MC concentrations have been below the GWQS (5
pg/L), with the last monitoring event below lhe detection limit (1.0 pg/1), at this time no
conective action for MC at this well location is recommended.
Paae 12
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 nitrate. In Attachment 3, below there is a
chloride and nitrate isoconcentration map prepared by DRC staff. Chloride and nitrate data for
the chloroform investigation wells are from the P' quarter 2009 monitoring event. Because some
tailing cell wells are sampled semi-annually and some quarterly chloride and nitrate data for these
wells are from the 4'^ quarter 2008 or l" quarter 2009 monitoring events. The map shows one
chloride 100 mg/L isoconcentration line and one nitrate 10 mg/L (10 mg/L is the GWQS for
nitrate). Outside the 100 mg/L chloride Isoconcentration line chloride concentrations range
between 6-91 mg/L. Inside this isoconcentration line chloride concentrations are the highest at
the facility ranging between 113 -1010 mg/L. Both the chionde and nitrate isoconceniration lines
appear to represent plumes that are in concert with each other. It is recommended that the a letter
be sent to DUSA requiring that they address and explain the chloride high concentration in
conjunction with the nitrate contamination investigation report that is due on or before January 4,
2010.
STATUS AND CONDITION OF THE CHLOROFORM PLUME
The Plume No Longer Bound to the South
Based on the chloroform concentration data in the monilor wells and although the chloroform
Isoconcentration map reported in the latest CMR shows a 80 pg/L isoconcentration line (violation,
see item 12 above), it appears that the chlorofonn plume is bound wilh wells around the perimeter
of the plume showing less than a 70 pg/L (GWQS) chlorofonn concentrations with the exception
to the south end of the plume at TW4-6 (see DUSA and DRC Chloroform Isoconcentration Maps
in Attachment 3, below). Since the 2"'^ quarter 2005 monitoring event chloroform concentrations
show an increasing trend in TW4-6 and in the l" quarter 2009 monitoring event for the first time
chloroform concentrations have exceeded the GWQS with a reported chloroform concentration of
81 pg/L (see Table 1 for the Inspection forms for the I" quarter 2009 monitoring event in
Attachment 1 and Figure 2 below). Based on the 1^^ Quarter 2008 Water Levels and Estimated
Capture Zones Map (see Attachment 4) and DRC Chloroform Isoconcentration Map (see
AUachment 3) it appears that the chloroform plume is being captured by the pumping system with
the exception ofthe area in the vicinity of wells TW4-4 andTW4-6. TW4-4 and TW4-6 are
located approximately 400 and 700 feet respectively down-gradient of pumping well MW-4 and
have chloroform concentrations of 2,200 and 81 pg/L respectively. Therefore, conective action is
recommended at TW4-6 with the following:
1, To hydraulically capture the elevated chloroform concentration in the vicinity of wells
TW4-4 and TW4-6 begin pumping TW4-6.
2. To bound the chloroform plume south of TW4-6 install a least one monitor well down
gradient of TW4-6 that will have a chlorofoim concentration below 70 pg/L,
This requiremeni will also be specified in the final Conective Action Plan (CAP).
Page 13
During a DRC / DUSA conference call on October 29, 2009, DUSA agreed that the recent
chloroform concentrations in well TW4-6 exceeded the 70 ug/l GWQS, and that adjustment to the
hydraulic containment program was In order. Two options to improve hydraulic control and
containment were discussed; 1) 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.
Further, DUSA agreed to choose and option and submii a plan of action and work schedule for
DRC review and approval by December 31, 2009. DRC staff will prepare a Confirmatory Action
Letter to document this understanding.
Highest Chloroform Concentrations in the Plume
The highest chloroform concentrations within the plume appear to exist in the vicinity of two
tocations (see isoconcentration maps in Attachment 3): 1) at pumping well TW4-20, and 2)
pumping well MW-4. The chloroform concentration at TW4-20 is 8.200 pg/L. Chloroform
concentrations for wells in the vicinity of MW-4 range from 1,700 to 3,100 pg/L. At both these
locations the pumping wells appear to be capturing these high chloroform concentrations with the
exception of possibility lhe 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 2,200
pg/L. The distance between these two locations is approximately 1300 feet with wells that have
chlorofoim concentrations ranging from 950 to 1,100 pg/L. MW-4 appears to be, according to the
1st quarter 2009 groundwater contour map, cross-gradient to the southeast of TW4-20 (see DUSA
groundwater contour map in Attachment 2) due to: 1) the hydraulic stress on the aquifer from
pumping wells MW-4, MW-26, TW4-19, and TW4-20 and, 2) the hydraulic groundwater
mounding effect or recharge on the aquifer from the leakage of the wild life ponds. Prior to these
man-caused influences, the aquifer near well MW-4 may have been more down-gradient of the
MW-26, TW4-19, and TW4-20 well locations, as seen the 1993 groundwater contour map
provided by the report by Peel Environmental Services (Peel 1993) [see AttachmenI 2].
Chloroform Contamination Source
Based on the P^ Quarter 2009 chloroform isoconcentration maps (see Attachment 3) the
chloroform contamination source continues to appear to be the abandoned scale house leach field
and former office leach field.
Based on the last four years of quarterly sampling events (since 1^'quarter 2005 to 1^" quarter
2009) the chloroform isoconcentration maps show that it appears the basic shape and extent ofthe
chloroform plume has not changed and may be in a static condition with the exception of the
recent migration of the plume extending south beyond TW4-6.
Page 14
References
Denison Mines (USA) Corp., June 2008, White Mesa Uranium Mill, Ground Water Monitoring
Qualily Assurance Plan.
Denison Mines (USA) Corp., November 2008, White Mesa Uranium Mill Chlorofoim Monitoring
Report 3"* Quarter (July through September 2008)
Hydro Geo Chem, INC (HGC) August 29, 2002, Well Installation Report
State of Utah Division of Water Quality Department of Environmental Qualily, March 8, 2005,
Ground Water Discharge Permit for Denison Mines (USA) Corp. at the White Mesa Mill Facility
Near Blanding, Utah.
Utah Division ofRadiation Control, August 23, 1999, White Mesa Uranium Mill: Notice of
Violation and Groundwater Corrective Action Order, Docket No. UGW20-0I.
Utah Division of Radiation Control, January 28, 2009, White Mesa Uranium Mill: Stipulated
Consent Aoreemenl, Docket No. UGW09-03.
Inspection Forms For
3"^ Quarter 2008
Utah Radiation Control Inspection Form
Chloroform Contamination Investigation
3rd Quarter 2008 Ground Water Monitoring Report
Denison Mines (USA) Corp.
White Mesa Uranium Mill, near Blanding, Utah
Regulatory Enforcement Documents:
• White Mesa Uranium Mill Ground WaterQuality Assurance Plan (hei^eafter "QAP").
QAP enforce on June 20, 2008.
• Groundwater Discharge Permit No. UGW370004 (hereafter "Permit"). Permit
enforce on March 17, 2008.
Date of inspection/Report Review: June 23, 2009
DRC Inspection Staff: Dean Henderson
Were Violations Recommended: Yes
GROUNDWATEiR MONITORING REPORT
1. Was the 3^*^ quarter 2008 Groundwater Monitoring Report (hereafter "Report") submitted
to the DRC by December 1, 2008 as required Part l.F.l ofthe Permit and section 11 of
the QAP?
Yes. The report was submitted on December I, 2008.
Violation: No
2. Was the decontamination procedure for all sampling equipment follow 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 wilh de-ionized ("DI") water. "
The pump used to purge the wells was only rinsed with de-ionized water prior to purging
activities.
Violation: Yes. Part lE.l(a) of the Permit and section 6.2.5 of the QAP
3. Were groundwater levels measured at the locations and frequency as required in the
section 6.1 of the QAP? Yes
Violation: No.
Wel!
MW-I
MW-2
MW-3
\TW-4
MW-5
MW-11
MW-12
MW-13
MW-14
MW-15
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
TW4-1I
TW4-12
TW4-13
Yes
Yes .
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
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
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
4, Were there Field Data Work Sheets for each Monitoring Well have the information listed
Part I.F.l(a) and in section 7.1 ofthe QAP? Yes
Violation: No
5, Where purging procedures followed as required In section 6.2.7(v) of the QAP (see table
4)?
No.
Violation: Yes.
Two violations:
1) Purging was not conducted at TW4-14.
2) With lhe exception of TW4-I4 there where no field parameters were recorded, only
one set of field parameters were measured in the following wells: TW4'2, TW4-3,
TW4-4, TW4-5, TW4-6, TW4-7, TW4-8, TW4-9, TW4-10, TW4-1 I, TW4-I2, TW4-
13, TW4-16, TW4-18, TW4-21, TW4-22, TW4-23, TW4-24, and TW4-25. These
parameters were measured prior to purging the required two casing volumes (see
Table 4).
6. Were water quality QC samples collected as required in section 4.3 of the QAP (see lable
below and Table 2)? Yes. Violation: No
Sample
Duplicate for each batch
of 20 samples.
Trip Blank for each
cooler shipped with VOC
samples.
Equipmeni Blank for
sampling equipment in
contact with the
groundwater (Pumps,
bailers etc).
Yes/ No
yes
yes
yes
Violation
no
no
no
Comments
TW4-65 a duplicate of TW4-3
TW4-70 a duplicate of MW-32
One trip blank. Energy
Laboratories reported "Trip Blank
lost due to instrument malfunction "
The Trip Blank sample will be
addressed in item 17 below.
One equipment blank identified as
TW4-63
Note: Although all QC samples were collected as required in section 4,3 of the QAP,
a sample results for a sample with the identification of TW4-73 in Energy
Laboratories analytical summary report was not identified, mentioned or explained in
the text of the CMR. This is an apparent QC sample and will be addressed in Item 17
below.
7. Were all the required compliance monitoring parameters analyzed for
monitor well as required in section 4 of the Appendix A ofthe QAP?
Violation: No.
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-I0
TW4-11
TW4-12
TW4-13
TW4-I4
TW4-16
TW4-18
'"Nitrate
10 mg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
yes
yes
yes
yes
yes
yes
yes
yes
yes
Chloroform
70 pg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
Parameters w
Carbon
tetrachloride
5 Mg/L
yes
yes
yes
yes
yes
ves
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
th their GWQS
Chloromethane
30 Mg/L
yes
yes
yes
yes
yes
yes
ycs
yes
yes
yes
yes
yes
yes
ycs
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
yes
yes
Chloride
No
GWQS
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
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
jes_
yes
yes
yes
yes
yes
yes
yes
yes
ycs
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
I. Nitrate + Nitrite as N
8. Were all groundwater quality analyses performed 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 4°C as required in section 6.2.12(e)
ofthe 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"C .
Violation: No
10. Were the compliance monitoring parameters analyzed by excepted EPA analytical
methods as required in Table 1 in section 8.2 of the QAP? Yes (see table below).
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
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
Chloroform
SW8260B
Yes
Ycs
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Carbon
tetrachloride
SW8260B
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
Ycs
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
Chloride
A4500-
CL
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
TW4-18
TW4-I9
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
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 ofthe QAP? Yes. 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
TW4-1I
TW4-I2
TW4-13
TW4-14
TW4-I6
TW4-t8
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-60
Parameters with their holding times
^'^Nitrate
28 days
Yes
Yes
Ycs
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
Carbon
tetrachloride
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Ycs
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
Meihylene
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
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
TW4-63
TW4-65
TW4-70
*Trip Blank
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes .
Yes
Yes
Yes
12. Did any oflhe compliance monitoring parameters exceed groundwater quality standards
(GWQS) [See Table 1]? Yes.
Nitrate. Nitrate + Nitrite: TW4-19, TW4-22, TW4-24, and TW4-25
Carbon Tetrachloride: TW4-19, and TW4-20
Chloroform: MW-4, MW-26, TW4-1, TW4-2, TW4^, TW4-7, TW4-10, TW4-11,
TW4-19, TW4-20, TW4-21, and TW4-22.
Methylene Chloride: MW-26, and TW4-16
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 TW4-3 (TW4-65) and MW-32 (TW4-
70) were within the 20% relative percent difference. Therefore the data set passes
the precision guidelines.
Representativeness (see Table 2): Duplicate sample for TW4-3 (TW4-65) and MW-
32 (TW4-70) were within the 20% relative percent difference. Therefore the data set
passes the representative guidelines.
Completeness: Is based on precision, accuracy, and holding time evaluation. Based
on this criteria as described above precision, accuracy, and lhe 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 arc 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 il
appears that the comparability requirements were meet.
14. Were the samples collected starting from least contaminated to most contaminated as
required in section I of Appendix A ofthe QAP (see Table 3)? Yes
Violation: No
15. Was analyses preformed by a State of Utah 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: Yes
The following are missing reporting requirements:
1) Part of section 6.b of Appendix A requires; "Identify all quality assurance samples,
e.g. trip blanks equipment blanks, duplicate samples."
A sample results for a sample with the ideniification of TW4-73 in Energy
Laboratories analytical summary report was not identified, mentioned or explained in
the text of the CMR.
2) Part of section 6.b of Appendix A requires: ''Identify all quality assurance samples,
e.g. trip blanks equipment blanks, duplicate samples. "
Energy Laboratories analytical summary report stated: "Trip Blank lost due to
inslrument malfunction". DUSA did not mention or address the Trip Blank lose in
the CMR.
3) Part of section 6,c of Appendix A requires: "Analytical results for each well
summarized in a data table, that includes historic analytical results for each well. "
Historic analytical results for all wells for carbon tetrachloride, chloride,
chloromethane, and Methylene chloride is missing.
4) Part of section 6(c) of Appendix A requires: "...3) depth to groundwater measured
and groundwater elevation from each momtor well summarized in a data table, that
includes historic groundwater level data for each well,... "
The CMR did not include a table with historic groundwater level data for wells TW4-
23,TW4-24, andTW4-25.
5) Part of section 6(c) of Appendix A requires: "a current chloroform isoconcentration
map with one ofthe isoconcentration lines showing the 70 pg/L boundary-. "
The CMR Included a cunent chloroform isoconcentration map but it did not show a
70 pg/L Isoconcentration boundary line.
6) Part of section 6.c of Appendix A requires: "Calculate chlorofonn mass removal by
pumping wells. Calculatums would include: l)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
fonn each pumping well for the quaner. "
No calculated chloroform mass removal by the pumping wells reported in the CMR.
References
Denison Mines (USA) Corp., June 2008, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assurance Plan.
Denison Mines (USA) Corp., November 2008, White Mesa Uranium Mill Chloroform
Monitoring Report 3^*^ Quarter.(July Ihrough September 2008)
State of Utah 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.
TABLE 1
HISTORIC SUMMARY OF MONITOHING PARAMETERS UP TO THE 1ST OUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
UW-4
1siQtr3/1&05
Snd Qtr M&DS
ardotrafai/os
4th oir 12/7/05
istotrao/oe
2nd Oir 6/14/06
3rd Qlr 7/2tV06
4ih oir \'V8J0e
Ist Otr 2/28/07
2nci Qtr e/arw
3rdOr&1S'07
4th Qtr l(VltV07
l3lOtr3/2a'0e
Znd Qtr 6/25/Oe
3rtlQir9/10/da'"
4thQtf mi^oe
1stQlr3'4/09
MW-4AfTW4-A)
1slQtril6rt)5
ziid Qtr s/iasitis
3rd Qtr 8/31/05 '
41h Qtr 12/7/05
IsiQtrMrtie
ZndOir&14.'06'
3td Otr 7;rCK)5
41hQlr 11/8/05
Ist0tr2/28rtl7
Parameter
GWQS
Carbon Tetrachloride
(Spgn.)
NA
NA
<io
<S0
<sb''
<50
<S0
NA
NA
<io
<50
<50
<50
<so
MW-26 (former TW4-15)
i« Qtr 3^16/05
2nd Oti 5/25/05
3rd dir a/3irt)5
4th Qtr 12/7/05
istoiraaoe
2nd Qtr 6/14/06
3rdQtr"7/2CV06
4^1 Otr 11/8/06
lStQtra2a/b7'
?nd Otr 6/27/07
3rdQt(B/15/07
4ihQir1Q/1(V07
tsi Qtr 3/26/08
Znd Qlr &25fOe'
3rd'Qtr'9/i(VbB'
41tiOir 1&15/0B
4«iOir 11/18^)9
1 st Olr 3/A/09
NA
NA
<5.0
<50
<50
<50
<S0
<1.0
<i 0 • •
<io • ••
<1 0
<10
<i.o'
<1.0
<"i;d "• .7
NA
<2.0
<1 0 "
MW-32 {former TW4-17)
1st Olr l'l ^05
2nd Olr M5.'05
3rd Qtr 8/31/05
Jth Otr \2n.'0b
l9tQlr:?L'a'06
2nd Qtr 6/l'4A)6
3rd Olr 7/2&06
4th Qtr 11/8/06
ist Qtr 2/28/07
2nd Qtr 6.27/07
3rd Otr ftf 15/07
athOtr ioqtyo7
1St'Qlr3/2'B/6a '
2nd Olr &25/08
3rdQtt9/l(V08
4th Qtr icvia/oa
1 SI Olr 3'4/09
NA
NA
<1.0
<1 0
<1.0
<1.0
<io"
<1.0
<10
<i.o "
<:1.0
<10
<1 0
<i.o • •
<1.0
<1.0
<1.0
2.1
1.6
I.B
1.9
• i 7
17
1.8
18
17
1.5
24
1.9
Chloride
No GWQS
NA
NA' •
NA •.
53
" 49
49
48
50
47
• •• "45
47
45
• 42
42
" ' 35
45
37
NA
NA
NA
55
'" 53
54
54
• 54
eo
Chloroform
(TOpgrt.)
'fl'- - 2,900
V • ."3,170
-'-• - 3.500
\^ 3.000
' •."a.loo
J.^-"."3.000
'•' •-•-7-2.820
-••^"7-2.830
':i&-".2.300
'5.5.-'.-2,000
-. ^2.600
-• .T= 2,300
^e2,466
•-.. ''i 2.500
:-. .'-:^1,B00
:^ '-*2.l6b
- .. •^•2.200
•• T-^ 3,700
-rt!^.' "3.740
"^••••-:'3.800
.;\.j-E3.000
V,^-:i'3,766
'-'..•, j's.soo
T '•f!~,3,i»
.A/i •*. • ... ..
V -.-2.500
Chl orom etharw
(Mpgfl.)
NA
NA
<ib
<50
<5Q '
<S0
<so
1.4
<1.0
*i.o
"^1.0
<'l.0
•cl.O
<T.O
<i'.o'
<i!o
<1.0
NA
NA '
•tio
<5Q
<S0
<S0
<S0
<10
<i.O
Methylene Chlorida
(Sjigrt.)
NA
NA
<10
<50
<50
<50
<50
<1.0
<1.0
<1 0
<1.0
<^6'
<1.0
<1.0
<i'o"
<10
<10
NA
NA
<10
<50
<50'
<'50'
<so
<10
<1.0
Well abandonded
NA'
NA
NA
55
52
52
155
54
56
49
57
" 57
49
57
44
64
NA
49
rjA
NA
NA
33
32
30
32
31
32
32
3'l
32
31
29
30
26
'30
'•'""-•:^'3io
^*_^\^^442
'^.-^ .-i^geo
•^^^.1,000
^.-.^i,1oo
- -^ 1^1630
• '.-2.170
'• -^ 262
-- ,f-1^570
'r. ~- 3** .''''•^^=^.io6
'iT.- '^'2.666
-l'^'' :•-' 930
-"" ".'-41.360
V„V '^630
NA
_ .^^l".700
'P-' W 950
<1.0
<1.0
<^ 0
<1.0
<1.0
<'i 0
<i 0
<V.o
<i 0
<i 0
<'io
<V.Q
<1.0
<V.o "
<1 0
<1 0
<1.0
NA •
NA
54
<M
<SQ
<S0
<S0
^1.0
<i'.6
•,:1 D
<'l.O
<10
•ci 0
<i.o'
<i.6
NA
<2.0
<1.0
NA
NA
32
<1 0
<1.0
3.5
1.8
. . ...^
<10
<^.0
<^.o
'<^.o
<1.0
<1.0
<1.0
.cio
<r.o
NA
NA
<5 0
<50
<50 '
<5Q .
<50 '
.;•; . .],—
y
_, . . " '7^ . .'. -„;
•"-? •
' ~ •- . ,'•
NA
' "^r .'
NA
NA
<1 0
el.O
<1.0
<\.o
<1 0
<1.0
<]0
<1 0'
<1.0
<i b •
tl 0 • •
<\0
<1 0
<10
<i.o •
NItrats. Ntttnte -••
(10 mg/L)
"
••
2.6
TC, •. '5.5
''." -r\l
- - •>36
'•£-' -14
-'.• •••40
.:-:•." 53
i-. /24
'.'.' "-I'do
''••:', - Si^
'
NA '
<6^'"
<0.1
•<^0.1
^'01'
<0 1
•fO.I
<1.0
<.\ <id
<i6'
<1.0
<i'b
.: 1
•^'o
<].0
<0.05
< 1
" 1
NHflte
6.3
71
•7.0
7.0
"be
" 6.C
1.2
6.4
6.3
7 0
62
62
5.E
6.1
6.4
59
5.7
• • 7.1
7.8
6.9
• 67
5.E
7.3
1.2
71
7.1
0.3
02
0.2
03
• 02
0.2
"- 1.4
• 0.3
.. 0 6
04
1
• "06
0 i
0.6
0.2
01
•'• 04
...
..
NA = not analyzed
NS = not sampled
Shaded indicates concent'ailona exceeding GWQS
Bold and Italics indicates the MDL exceeded the GWQS.
iBl Qtr = January . Match
2nd Qtr- Apiil-June
3rd Otr - July - September
4tti Qtr = October - DecemBtr
TABLE 1
HISTORIC SUMMARY OF MONFTORING PARAMETERS UP TO THE 1 ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
NA = nol analyzed
NS = not sampled
Shaded indicates concenirations exceeding GWOS
Botd and italics indicates the MPL exceeded the GWQS.
1st Otr = January- Marcti
2nd Oil ^ April-June
3rd Olr = JulY - September
41*1 Olr - Oclober • December
Well
Sampling Event
TW4-1
IstQtryi'e/OS
2nd Qlr STZS/tS
3rd Qlr 8/31/05
4th Otr 12/7/05
1st Qtr 3'a'06
2nd Qtr &! 4/06
3rd Olr 7/2CWB
4th Qtr 11/8/06
1st Qtr 2/250)7
2nd'Qlrfi/27/07
3ni Qtr & 15/07
4thOlrl0/1CV07
IstOtra^B/O'S "
arid Otr &25'08
3rdOlr9/lQ^e
4th oi'f "ifti'sfle
1st Qtr 111/09
TW4-2
1st Olr 3^16/05
2f>d Qtr a'25f05
3id Qtr 8/31/05
4th Qtr 12/7/05
1st'Qtr 3/9/06
2ndOtr6/14A)6
3rd Qtr 7/2CV06
4tfi6tr ii/aioe
lstQtr2.2a''0'7
Znd Qtr 6/27/07
3rd'Oti 8/15/07 '
41h'Qlr 1[VltVb7
ist6tr3^&68
2nd Qtr 5'2'5i08
3rd"Qli SnO/OB
4m Qtrl cvi 5/06
4tb'6ir 11/18/09
1st Otr 3/11/09
rW4-3
1stOlr3'1&'05
2nd Otr 5/25f05
3rd Qtr 8/31/05
4th Otr 12/7/05
Ist Qtr 3/3(06
2ndQir6.'l4A)6
Srd Qtr 7/2*06
4th Qtr i 1/8/06
l3tQtrZ-2a'07
2nd Olr 6/27/07
3id Otr a/15/07
4ihQir 1D/1CV07
l3tQt'r3Ca/0a
2nd Otr 6'25'/6e
3rd Oir 9/10108
4th'Otr ltVl5/08
1siQir3.-4/09
TW4-4
l'ai'btr:V16/05
2nd Otr S'2'5/b5
3rdQtra/3l'/05
4ih' oir 12/7/05
lstQtr3f9,-b6
2ndOtr6/14rt)6
3rd Qtr 7/20/06
41h Qtr 11/a06
Ist'Oti 2/28/07
2nd Qlr &27/07
3rd Otr S'l 5/07 "
4th Otr l(V10rt)7
l3l'Qtr3.'2a/0e
2nd otr 6/25rt33
3rdQtr'9/'lO/08
4thQtrlO/1&08
4thQtrll'/i8/b9
isi Qtr 3/4/09
1 Paratrteler
GWQS
Carbon Tetrachloride
(Sptfrt.)
NA
NA
<10
<so
<50
<S0
<S0
-
NA
NA
<10
<50
<50
<50
<5p
NA
NA
NA
<i.b
<1.0
<'l.0
<'i'b
<1.0
<'i'.'o
<:'l 0 '
<1 0
<"i 0
<1.0
<10
<1 0
<1.0
<1 0
<1 D
NA
NA
<10
'<50
<50
<50
<50
<2.0
1.4
12
"l'4
13
13
1.3
1.1
13
1.3
1.1
23
18
25
2.2
2 1
23
2'2
2.4
2.4
" 2.2
1 7
15
1 7
1 5
1 5
1 6
1.5
1.4
NA
12
Chloride
No GWQS
NA
NA
NA
52
'49
48
51
47
47
45
43
43
39
39
35
41
'37
NA'
NA
NA
56
'56
56
54
55
54
50
' '49
'51
48
46
•42
47
NA
46
NA
NA
NA
' 26
26
26
26
23
' "22
•23
"24
.:27
21
19
' 19
22
21
N/\
NA
NA
'54
51
48
50
49
' " 49
47
45
47
" 43
42
"39
44
NA
37
Chloroform
(70 Mat-)
'•>- '2,700
•=..-'-'3,iMb
Jlf. 2.900
"-'•V-2,400
• • -r 2,700
?' • .-"2,200
;^-^'2.840
•"'^" • 2.260
.-;: - . .1.900
•-^••^1.906
"'^y• 2.300
-'.-: ^""2.000
--' •• :'-'2.b66
•' : 1.900
V •• --1,700
>-1.700
."-'' • 1.700
F".>3.7'0i6
•.:4^ 3.750
<r-'~r-j-''Z.90b
=2- /•'3,500
i^'.... 3,806
. 7^: 3.206
• .<=4,120
=.=---\ 3.420
j-V:"r:'2,36o
=: "^^ -^ 340
"?•; •-;.3.200
:.7:^ 3.300
•'fe- 3.106
'.-\W 2,600
NA'
- "''.-'' 3'200
^ " ^3.100
<1.0
<:1.0
-rl.d
<1 0
<1.0
•fl.O
<1.0
<i.'o
<V6 <i b
•:1 b
*1.0
<i b
<i.o'"
<^ 0
•cl.O
<10
--•'••"•• "3','ib6
" ?2.^406
-•^. "'• 3.200
. ••^-J2.8'0b
-., •4'2.90b
^•.' - 2,600
l-J • • 2,656
- * .. 2.670
, , 12.200
" '.. : 2.400
'< ' 2.700
='•;• -='2.500
" ".-2.B0O
,'^-=2.500
. ::-^"' 2.200
NA
'"^ :-"2,500
; "j^- 2 266
Chloromelhnne
OOpgO.)
NA
NA "
<10
<50
<50
<50
^SO
<ib "
<^ 0
<'i'6
<1.0
<1.0
tio"
<i.o
•,:1.0
<1.0
NA
NA
<io
<50
<S0
<sd
<50
<1.0
<i.6'
<].0
<10
•cl 0
<i6
<i.6
<:l6
NA
<2.0
•cl.O "
NA
NA
' 6.4
<1.0
23
16
22
<1.D
<1.D
<i"b
<i.o
<1 0
.-.t.O
<l'6 '
-riO'
.cl.O'
<1.0
NA' '
NA
<10
<sd ' "
<50
<50
<56 '
0.0
^i.o'
-:1 0'
•:-i0
<:I.O
<1.6"
<10
cl 0
NA
<2.6
<1.0
Methylene Chloride
{5^,a^.)
NA
NA
<10
<S0
<»
<50
<50
^i.6
<l'.0
<i'.6
<i.b
<i'b'
<1.0
<\ 0
•cl.o'
cl.O
<1 0
NA
NA
<10
<so <so
<50
<50
<1.0
<1.0
<10
<1.0
<1 0
cl.O
<10
<.10
NA '
<2 0
<i 0
Nft
NA
<:10
<10
<1.0
•ci'.O
cl.O
<i.b'
<1.0
ti'o''
<'i.o
•el.O
<1 0
<i 6
<10
<ib
<1D
NA
Nft
<I0
<so
<50
<50
'<so
<1.0
<:10
c'l.O
<1 0
<i.o
<'i'.o'
•c'l 0
<1 0
NA
<'2.D
<10
Nitrate, NHraie ••• Nitrite
(10 mg/L)
9.1
•"•^"-^•'""•^^'"•-•^."'-lo.e
'9.6
9.7
94
9 6
9.2
B.e
S
8.4
7.8
7.6
8.68
e.i5
9.3
7.5
7.7
8.6
e!c
7.B
7.5
71
74
7.6
•7'3
78
7.3
6.9
'6.9
7.4
71
80
NA
6.5
35
3.7
3.5
33
..33
7.1
2 9
l!5
31
33
3!l
2.8
2.8
2.9
2 7
2.6
25
160
•':= .'--r. ,:, •=••• u-z
. ..^^
"'-f- ^•'•'"-"^ -"• ib"2
95
. . .. 8.6
9.7
,.;^- '•- -.: i-.' io;)
.^•o
94
95
9.'5
9.2
•-S:i':-^ ..:--• •: 108
" ' 88
'\ ' -^ •". -""JOI
NA
?•;•• • /' ,:..:-r"- io.2t
TABLE 1
HISTORIC SUMMARY OF MONrTORING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
TVif4-5
ist Qtr 3/16^5
2nd Otr 5/2^05
3rd" Otf 8/31/05
Ulh Qtr 12/7/05
isiQtfiw/oe""
2nd Qlr 6/14/06
3rdOtr7/20«6
4lh Qtr 11/&06
1st Qtr 2/28/07
z'rid'Otr'&iJ'T/O?
Srd Qtr 8/15^07
4th Otr 1G''l(V07
1at"Qtr3/28/0e
2nd Qtr 6/25rtM
3fd Qtr g/iivoB
4thQtr1(yt&08
lstOtr3'4/69 '
TW4-6
1st Qtr 3/16/05
2nd Qtr 5'25/05
Srd Oir aa 1/05
4th Olr 12/7/05'
istotra&'be
2nd Qtr 6/14/06
3fd Qlr 7/2(y06
4triQti11/art)6'
ist6f'2/28flD7 "
2nd Qtr 6/27/07
3rd Otr a/15/07 "
4th'Qtri'6/id'b7
lstQtr3/2B/08
2nd Otr 6/25/08
3rd Qtr 9/10-06 '
4tnQir i(yi5/oa
l3t Otr 3/11/09
TW4-7
ijiotr'i/ia'bs"
2nd Qtr 5.2^'05
Btd'oti a/3i;05"
4th Qtr 12/7'05
]si'6li'a9/06 '
2ndOir6/14,'06
3nJ Qtr 7/20,06
4ih Qtr i'l/a/oe
istOlr2'2a'07
2nd Otr 5/'27/67
3'd Qtr 8/15^07
4th Otr I a/1 CVO?
i'9tQtr3/'2a/b8'
2nd Qtr 6/25/08
3id Oir 9^1 woe
4th'Qtr 10/1 a'OS
4ttiQtr 11/18/09
1st'Otr 3/11/09
TW4-e
Ist Otr 3'16/06
2iid Qtr 5/25/05
Srd Olr 8^31/05
4tri'6tr i2!7.'05 '
1 st Qtr 3/9/OQ
2nd Oir 6/14/06
3ra Otr 7/2CV06
4th Qtr 11/8/06 "
131 Qti 2/28/07
2nd Qtr 6/27/07
SidO'tr'a/i's/b?
41hOlr 1Q,1Q07
Isl Otr 3^8/08"
2nd Qlr 6^25.'0a
3rdQtr9/1l>08
4l"h'Qtr i[V15/08
!slOlra4/09
Parameter f
GWQS 1
Carbon Tetrachloride
(5 pgl.)
NA
NA
c2.5 "
c2 5
<2.5
<2.5
.;1.0
•cl.O
<1.0
<'i.d"'
cl.O
<1 0
<1.0
<1.0
<i.o
<1.0 "
<io
NA
NA
cl.O
lio
<1.0
cio'
<1 0
cl.O
cio
<10
<1.0
tl 0
<10
Cl.O"
<10
c''i.o
<1.D
NA
NA
<10
<so
<5a
<so
15
1 i
15
1.2
13
1 3
l"4
NA
<2.0 "
1.2
NA "
NA
•,;1.6"
<\"Q'
<\0
cl.O"
cl 0
cio
<I.O
<;1.0
< 1 0
ClO
cl 0
<].0
<1.0
< i 0
cl.O
Chloride
No GWQS
NA
NA
NA
56
52
" 51
54
" 55
57
45
"38
39
38
37
"34
37
34
NA
NA
NA
32
31
"30
37
65
32
38
36
"35
33
35
35
33
35
NA
NA" "
NA
52
48
47
51
49
47
" 45
44
45
"43
43
"35
40
NA
35
NA
NA
NA
"41
39
"37
39
40
39
42
42
43
46
"45
39
44
42
Chloroform
(TOiig/L)
"--•"^7. 113
= .HTT- B2
"63
"66
51
53 7
47 1
"35
-26
9.2
94
'll
.93
" li
10
12
<1.0
2.5
10
17
31
• 19
" 11
" " " . 42.8
46
11
18
18
52
24
39
37
Bl
. .-='3.100
=•_. •_ 2 700
""/'T3,i6b
: '"^2,500
.: .^1.900
^'- >-2.200
: ..^-2."140
X-" •-;2,"i66
""-.y %1.B30
^- .2.600
;'"•' ="2.300
v^ 1.900
•j:-^ 2.200
"-—-^ ll.BOO
-^-^•.•^1,600
NA
-J Z 2.500
.-''" ""-"1,600
10
cl.O
1.1
cl b
1.3
1.8
^1 6
-ri.o
2.5
"""2.5
"" -• "15
3.5
.tfl.O
cl 0
.ClO
<1.0
<1.0
Chloromethane
OOpgrt-)
NA
NA'""
58
25
3.1
31
cio
<1.0
<1.0
'<.\.o
<ro
<1.0
<:1.0
<1.0
<i".o'" "
<1.0
<:.o
NA
NA
2.6
13
Clio
<i b
^10
•cio
tl.O
<1.0
Cl.O
cio
<io"
Cl.O
<1 0
cio"
Cl.O
NA
NA"
<10
•:S0
<SQ
<S0
cl.O
•cl.O
<1.0
ClO "
cl.O
< 1.0
<1.0
•tl 0
NA
<2.0
cl 0
NA
Nft
1 7
<"i"o
2.1
10
cl.O
tl 0
c"i"!b
c"l"0
cl 0
ci.o
<1 0
ClO
<i.6
cl.O
Methylene Chloride
(5 ugl.)
NA
NA
<25
c2.5
c2.5
<2."5""""
cl.O
cl.o"""
cl.o"""
cl.O"
<i.b
Cl.O
<10
cl.O
<i b"
cl 0
Cl.O
NA
NA"
cIO
cl.O
<i.6"
cl.o
cl.o
<i 6
<10
ci.6"""^
cl 0
cl.o
cl.o"
cl 0
cl.o
cl 0
cio
NA
NA
cio
<so
<50
<50
< 1.6
<1 0
ClO
cl O'
cl 0
<\.Q
<1 0
NA
c2 0
cl.O
NA
NA
NA
cl.O
cl.o"
<i6
cl 0
clo""
<1 0
cio
cl 0
v-1 0
tio
cl.b"
cl 0
clO
cl O"
Nllrale, Nitrate + Nitnte
(10 mgn.)
"4.9
3.7
6.0
Q.G
6.0
" 59
6.7
2.9
7.6
7.C
7 7
S.2
74
6 7
"""7.9
9.3
7.S
02
0.4
08
0.9
1.2
1.0
0.6
1.4
18
b.6
0.7
be
1.1
09
i .1
"i.O
22
5.2
54
52
53
1
4.5
4.7
" " 4.6
6
5 1
4!7
4.;
42
4.8
4.16
401
NA
37
cO.l"""
02
cl.b
ClO
03
cl.b
0 1
cl
6.7
0.2
cl 0
05
0 1
cio
cO.05
cO"05
cO.l
NA - not analyzed
NS - not sampled
Shaded indicates concentrations exceeding GWOS.
Bold and Italics indicates the MDL exceeded ihe GWOS.
Isl Qtr = January • March
2nd Otr = Apnl - June
Srd Qtr = July - September
4th Qtr = October - December
TABLE 1
HISTORIC SUMMARY OF MONrTORING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
NA = not analyzed
NS - not sampled
Shaded indicates concentrations exceeding GWQS.
Bo'd and italics indicates the MDL exceeded the GWOS
1 st Otr = January • March
2nd Qtr - Apnl • June
3n3 Qtf ^ July - September
4tti Olr = Oclober. December
Well
Sampling Event
TW4-9
1stQtr3/16'05
2nd Oir MS'OS
Srd Qtr 8/31/05
4th Qtr 12/7/05
1stQtra9/D6
2ndQtr&14f06
Srd Olr 7/2CV06
4thQtr11/a'0e
1st Qtr 2/280)7
2nd Qtr 6/27/07
3rd Qtr a/15/07
4thQtr 10/1(V07
Isi Otr 3/25/08
2nd Qtr 8/25/08
3rd Qlr 9/1 ooe
4thQin(yi5/0B
iBt Qtr 3/4/09
rw4-io
isioira/ie/bs'
2nd Qtr 5/25/05
3rd Qlr 8/31/05
4th Qtr 12/7/05
1siQtr3'9/06
2nd Otr 6/14/06
3rd Qtr 7/2006
4th Qtr 11/»06
1st Qlr 2/28/07
2nd Otr a/27/07
3idQtr8/1E^b7
4th Otr iaiQ/07
1510113/28/06
2nd Otr 6/25,06
3rdQtr9/1(H]8
4ih Otr 10/1 a/Oe
4ttiOtr ll/ia/09
1st Qtr 3/11/09
TW4-11
1st Otr ivia/os
2nd Qtr ^2a05
3rd Olr a/31/05
4^ Qtr 12;7/05
1st Otr 3/9/06
2nd Qtr S'l4/06
3na Qtr 7,-20-06
4th Qtr 11/8/06
1st Olr 2/28/07
2nd Qtr 6.'27/07
3rd Qtr 6/15/07
4th Qtr 10/10/07
lslQtr:V2a'06
?nd Otr a/25/08
3rd Otr 9/10/08
aih Qlr 10/15/08
4th Qtr 11/18/09
1st Qtr 3/11/09
TW4-12
1siQtr:V16/05
2nd Qtr 5/25/05 •
3rd Qtr 8/31 TO
4ihOlr 12/7/05
1st Qtr 3^/06
2nd Otr & 14.06
Srd Olr 7/2tV06
4th Otr 11/8A)6
l3tQtr2/28r'07
2nd Qtr 6/27/07
3rdQir'a/15/07'
4lhOti 1Q'1C107
Ist Oir 3*28/08
Znd Oil 6/25/08
3rd Qt- 9/1Q/08
4ihOtr iai5A)B
Isl Qtr 3/11/09
Parameter
GWOS
Carbon Tetrachtonde
(5 Mg/L)
NA
NA
cl.O
cl.b"
cl 0
<10
<1.0
cl.o
<10
cl.o
cl.o
<10
cl.o
<1 0
cl.o
cl.O
cl.o
NA '" ""
NA
c2.5
<25
c5.0
<5 0
c5.0
cl.O
cl.O
<10
ClO
cio
cl.O
cl.O
cio
NA
c2.0
cl 0
NA
NA
<W
<100
<50
<50
<50
1.7
1.:
1.6
1.7
1 6
tl 0
cl.O
cl 0
NA
c2.0
<1.0
NA
NA
ct D
cIO
cl.O
tl.O
cl.O
cl.O
.:1 0
cl.O
<r.'o
cl.O
cl.O
clO
cl.O
cl.O
tl.O
Chloride
No GWQS
NA
NA
NA
42
38
39
41
44
44
42
38
40
35
35
28
5B
30
NA
NA
NA
52
50
54
61
58
2
54
59
59
55
58
51
61
NA
64
NA
NA
NA
58
56
56
55
55
54
53
53
53
63
46
42
47
NA
49
NA
NA
NA
19
19
16
16
16
16
18
29
16
16
19
IB
22
23
Chtorolorm
(70 pQ/U
38
1.2
tl.O
cl.O
cl.b
19
cio
cl.O
cl.O
21
9.5
67
1.3
1
cl.O
cl.O
cl.O
• .';-.:- IdO
624
^-r -rno
''j ' - .300
=••- --"L 100
.•_::^-300
\^:: — ^
J . --•452
i^J. .- '500
•^.•:-i--.>3'56
660
-..-; -470
-^.^^••72b
.T" • '•660
NA
.t-~1.200
1.100
k - ."4.400
--•' " 3.590
-. 4.406
. 4.400
• -4.400
.^-- 4,300
- T - 4.060
-/-•- 3.660
^ 3.600
3.600
-4.500
"•-4,400
3JC
-•• 640
^_v "900
NA
1,000
••• 1.000
cl.O
cl.O
cl 0
ClO
tl.O
tl.O
cl.O
cl.O
cl.O
cl.O
tl.O
cl.O
cl.O
clO
cl 0
tl.O
tl.O
Chlorome! harw
(30M91.)
NA
NA
29
tl.O
2.6
27
•cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cIO
ClO
cio
cio
cl.O
NA
NA
6.2
<2.5
c5 0
c5.0
c5 0
i.6
cl.o
tl.O
cl 0
cl 0
cl.o
cl.O
tl.O
NA
c2 0
cl.O
NA
NA
tlO
<100
<50
<S0
<so
2.7
cl.O
tl 0
cl.O
tl 0
cl.O
tl 0
cl 0
Nft
c2 0
cl 0
NA
NA
58
1
2.6
l.J
1.4
cl 0
cl D
cl 0
clO
tlO
tl 0
cVO
cio
cto
cl.O
Hfcthylene Chloride
(Sfjgo.)
NA
NA
cl 0
cl 0
cl.O
cl.O
tl.O
tl 0
cio
cl.O
cio
cl.O
cl.O
tl.O
cl.O
cl.O
cl.O
NA
NA
c2.5
c25
c5.0
tS.O
c5 0
cl.O
cl 0
cl.O
tl.O
cio
cio
cl 0
cl.O
NA
c2.0
tl.O
NA
NA
<7D
cfOO
^50
<50
<50
1.3
1 6
cl.O
tl 0
1 2
clO
cto
cl.O
NA
<2 0
cl.O
NA
NA
cIO
cio
cl.O
.il.O
tl 0
cl 0
cl.O
cl 0
cl.b
tl.O
cl.O
tl.O
tl 0
cio
cl 0
Niiraie, Nitrate -i- NKrIle
{10 mg/L)
1.;
1;
1.3
1.3
1.5
1.5
O.S
0.7
O.e
1.;
I.E
2
2.1
.. . ^?.
2.7S
1.9S
2.',
1.6
O.E
1.1
3.C
2.4
35
6.6
5.7
7.;
5 1
7.;
67
7.E
9.e
9.2;
^-."••^. .-'^ •Tr^'ios
NA
.^-- •.- ,•--. .:= 11.6
67
_ . ^,. • r =:=^10.S
9.4
g.-i
9.2
10.C
IOC
IOC
^ - 'J T .-- --io.i
•. ^ ^10.e
•-•= ..••••• .^- ^T- 10.2
• 98
7.7
7.;
7.E
9.5
NA
73
14
I.e
1 5
1 4
1 3
1.4
1.4
1.4
1.5
1 5
14
1.4
1.6
2.7
2.7
25
2.4
TABLE 1
HISTORIC SUMMARY CF MONITORING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHrTE MESA MILL
NA = not analyzed
NS = not sampled
Shaded Indicates concemrailons exceeding GWOS.
Bold and italics Indicates ihe MDL exceeded the GWQS
1st Qtr - January . March
2nd Olr - April • June
3rd Qtr = July - September
41h Qtr ^ OcTiober - December
Well
Sampling Event
TW4-13
i'st Qtr 3/160)5
2nd Qtr'5ffl 5/05
3fd oir 8/310)5
4th Qtr 12/7/05
1StOtr3WD6
2nd Qtr 6/14/06
3'rd Qtr'7/20136"'
4th Qlr 11/8/06
ist Qtr 2/280)7
2nd oir'6/27/07'
Std Qtr 8/150)7
4th Qtr 10/100)7
1st Olr a/26/08
2nd Qtr'6/25/Oe'
SrdQlr9/1CV08'
4th Ql'fl'tti 50)6
1st Otr 3'4.oe
TW4-14
IstOtrliaOffi
2nd'Qtr5/25rt)5'
Srd Oir a/31/05
4th'Qtri"2/7/05
1stblr3W06
Znd C^r 6/14/06 '
3'rd'Qtr7/2Q0)is "
41ti'bir 11/8/06
lst'dt'r"2/2a0)7'
2nd Qti 6/27/07
SrdOlrB/lSrt)?
(tfl Qtf'ib/'i'O/O?
1st Olr 3^28/08
2nd Qtr 6^5/06
SiidOr'si/iabei"'
it'h'blr i'cyi"5/bB'
1stOtr3'4/09
TW4-16
1st Otr 3/16/05
2nd'Qtf 5/25/05
3r'd'Qtr&3W05
4'thClti 12/7/05
Ist Olr 19/06 '
2n'd'btr"6/"l'4/66
3nd Citr 7/20/06
4tn Otr 11,8/06
1st Qtr 2/28/07
2nd Citr a/27/67
3rd Qtr'8/15037'
4thQtr1[V10'07
Ist'Oir 12808
2nd Otr 6/25/OB
3i'dQtr9/1(V08
4th Qtr lO/15'Oe
1 SI Qtr 3^.5/09
TW4-18
1st Qtr 3/16/05
2nd Qlr 5/25/05
Srd Otr ft'31/05
41hQtr 12/7/05 "
1st Otr 3/9/06
2nd Qtr a/lioe"
3rd Olr 7/2C^06
4ihQtr ii.'a'oe
1StQti2/2a'07
2nd Qti 6/27/07
Srd Qtr 8/15/07
4ihOir"l0/10/07
1st Otr 3/26/06
2rKJ Qti 6/25/08
sidoira/njoa
4m'Qtriai'5/69
IStCilr 11,09
Carbon Tetrachlortde
(SpBrt.)
NA
NA
cl.O
<10
cio
ClO
<"l.0
tl.O
tl.O
cl.O
cl.O
ClO
cl.O
cio
cl.O
t'l.O
tl.O
NS
n&-
NS
NS
NS
NS
NS
cl.O
tl.O
cl.O
cl.o
c1.0
cl.O
cl.O
cl 0
cl^b
cl.O
NA
NA
cl.O
cl 0
cl.O
tl.O
c'i'.O
cl.O
tl.O
tio
ci6
cl 0
cl 0 " "
ci.o
cl 0
cl 0
tl 0
NA
Nft
clO
ClO
ci.o
cl.O
cl.O
cio
cib
cio
cl.O
cl.o
cl.o
cl 0
cl.o
cio
cl.o
Parameter
GWOS
Chloride
No GWQS
NA
NA
NA
69
67
'66
65
' ' ' 33
59
59
58
58
54
58
50
58
58
NS
NS
NS "
NS
NS
NS
NS
37
38
36
36
38
57
35
34
40
35
NA'
NA '
NA
64
60
55
60
62
79
75
65
69
52
58
' 71
69
•73
NA
NA "
NA
41
36
35
35
34
' ' 30
28
32
27
23
23
26
30
29
Chloroform
(70tjga-)
tl.O
cio
cl.o
cio
tio
cio
cl.o
c'l.O
tl.O
c'id'
cl.o
<10
ClO
cl.o
c'i'.O '
c'i!o
c'lO
NS
NS
NS
NS
NS
NS
NS
NS
cl.O
ci.o
cl.O
tl.O
cl.O
cl.O
<1.0
ClO
cl 0
240.-... .-i"
. •--- 212
••••• ~ as
'ii
30
"13
52
136
" 8 7
"s'e
'ri 1 4
11
cl.o
io
39
c'lO
38
29 6
39
14
12
12
108
12 5
9.2
8
89
74
64
57
8
9^4
11
Chtoromatharw
(30 pgt)
NA
NA •
'3.1
cl.O
1.7
1.4
clO
clO
cl.O
<1.0
tl 0
cl.O
cl D
cl.O
cl.O
clO
cio
NS
NS
NS
NS "
NS
NS
NS
ci.o
clO"
cl.o
cio
cl.O
cio
clO
cio
cl.O "
cl.O
NA
NA
32
26
1.1
2.4
cl.O
tl.O
tl.O
cl 0
cl 6
cl 0
cl.O
cl.O
cl 0
tl 0
tl 0
NA
NA
'" 28
1 1
1 6
2 7
tl.O
tl.O
cl 0
clO
cio "
cl'o
ClO
cio
cl 0
tl 0
clO
Methylene Chloride
(Sjjgt.)
NA
NA"
cl.b "
cl.b "
cl.o"
ci.o
<i.6
tl.O
tio
cio
cio
cio
cl.o"
tl.O
cio
ci:6
<i 0
NS
NS
NS
NS
NS
NS "
NS
cl.O
cl.O
tl.O
cl.O
tl.O
ClO
cl.O
cl.O " " '
cl.O
cl.O
NA' '
NA
S^'^_-:'""TL~' ",42
"-•. ^-. - i^' 5.9
•."^"i=™-- .'-^ • 21
—-.r.^^ -." -'. 8.9
"2.7
." "':"^."= --^-'"66
'is
- .i?r^ ; Ji\ 5 1
1
=-"."'"' "-=^ 'V 26
c1.0'^"'
.-- * . •^rJ- .^ 14
. • _. - • 6.6
cl.b
NA
NA
tl 0
clO
tl.O
ti.6
cl 0
cio
cio
cio"
cl 0
tl.O
cl 0
cl.O '
cio
cl.O
tlO
Nitrate, Nitrate + Nitrite ||
NS
NS
NS
NS
NS
NS
NS
cO.l
tO"'l"
cOl
.- -.
>
=^
(10 mgfl.)
4.2
43!
461
43
4.2
4.9
"" 4.3
08
4C
... .^.^ 4.4
4.1
3.t
4.2
"4.3
4.6
" 3.7
2.4
2.3
1.4
1.1
oie
0.4
1.6
1 38
"1 "6"'76
16
•
14
: 1.9
" "2.7
56
\^- r"^ • ' .12.3
• 9.9
"5''4
4.4
cO I
"15
^r^- = •"._;io5
9.82
9.6
'-"^'^"•'.±-=i. 14 1
~-- •--:- ,12.9
. y '. :"-'"''l33
7.0
5.9
4.7
6 1
5.7
5.1
4.9
5
"4.4
07
4.6
4.86
""""5.15
5.2
TABLE 1
HISTORIC SUMMARY OF MONITCRING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampiing Event
rW4-19
1st otr :vi a/05
2ri"d" CSr 5/25035
3n3 Qtr 8/31/05
4th (Jtr 12/7/05
1st Qlr 19/06
2n"d"Qtia'14/06
3fd oil 7/200)6
4th CJlr 11/6/06
1stbtr2/2S/07"
End Otr 6/27/07
SrdOt"r"a'15/07
4th""Qtr ICVl00)7
lslOlr3/2a«)6
2nd Qtr 6/25/06
SrdOtra'IQ'OB
4th Qtr Wl aoa
l3t"Otrl4A)9
TW4-20
ist Qtr 11605
2nd "otr 5/25/05
Srd Qtr ^31/05
41h Citr 12/7/05
IstOlr 19036
Jnd Citr 6/1*06
3rd Qtf 7/20/06
4th Qtr 1 i/a/oe
lat Olr 2/28/07
2nd OtF 6«7/07
3rdC3tra/i5rt)7
4thOtr 1(vi0/07
lat Qtr'1280)8
2nd Qtr 6/25/08
SrdOtrg/KVbe
4thdtr'lQ/i5flB
ist Qtf 3/4/09
rW4-21
1stQtrll6'05
2rid Qtr 5/25/05
l3id Citr 6/31/05
4th"Qtr 12/7^05
1st Otr 3/9/06
2nd'Citr'e/14/06
3rd'Qlr 7/20/06
4th Qlr 11/8/06
l3t Qtr 2/26/07
2nd Oil &27/07
Srd Oil 6/15037
4th Citr 1CM0^07
iLt Qtr 128/08
2nd Citi 6/25/oa
SroOtraiOoa
4th Oil 1CV15/08
4th citr 11/180)9
1siatrlll/09
TW4-22
lat Olr 116/05
2nd Oir 5/25/05
3rdQti'a^l/05
4th Citr 12/7/05
1st Qtr 19/06'
Snd Qtr 6/14/06'
Srd Oti 7/2tV06
4th'Oif ll/'i06
Istdtr 2/28,07
2nd Oir 6/27/07
Srd Otr 8/15/07
4ihCnr 1CV1007
1st Citi 128/08
pnd Qtr a/25/08
Srd Qlr 9,1 &08
4th'Otr icvisoje
4th Olr 11/18/09
list Oti 111/09
Parameter
GWQS
Carbon Tetrachloride
(5 pgl)
NA
NA
c5.0
<» <50
<50
<sp
cl 0
g-g'^.: •_.••; ^^^^'-'-.
12:^^^'"'^^:r
1.2
NA
<10
<250
<SO0
<S00
<1000
- ^ -w ^=' . . .-^, .^^
• ^^'^^" >•-'
y^_- !. "^'"'.''"'"_ „,- •ri=p~-.-..^
NA
5;7=='"".-^=^-.
NA
c5'b
cl 0
t2.5
c'2"5
<2.5
'-'"•^ ' "i •
cl 0
cib'
'-'---" ,J^ " '
UA.
2
cl 0
NA
t'5 0
c50
<J0
<fO
CfO
<1 0
cl.o
cl 0
cl.O
tl.O
cl 0
cio
1.3
NA
t2.0
cl 0
1.6
1.3
Chloride
No GWQS
NA
NA' '
NA
81
86
116
123
134
133
Chloroform
(70pgn.)
•;-." "2.200
"•''•i ""••'1,200
" i.4"b6
= .^"" "2.860
-• 1,200
. ": -. 1.160
" "'- -1;'120
, '''.-i.o'so
y.. 1,200
Chloromethane
(SOpgfl.)
NA
NA
c'5 0
^50
<50
<so <so 2 6
cl.O
1 Methylene Chloride
(5pgn-)
NA
NA
c5 0
c50
<S0
<50
<50
cl.O
cl.O
Did not sample
19
1.9
"2.9
• ;.v=
'':""•
129
132
131'
126
113
'124""' '
127
'i'--' ';i™
••-f'' .1.106
i.eo6
-••" -1,000
• ""_"3.600
""•*•' • 4.266
;• • i.icio
tl.O
.Tl.O
cl 0
ci"6
cl.o
tiib'
cid
cl.O
cio
tl.O
cl.o
cl.O
cio
ClO
Monitor well was nol installed
•-7.1
31
2.2
3.5
•r:6 8
2J:;9
=^13
15
'-=:-
NA
NA
131
' 120
"235
134
" 124
124
' 112
117
170
132
191
156
168
164
• -v- 39.000
Vr" 3.800
;•":. 19.000
-"-:• -~ 9.200
'^ -61.000
5.300
"^''^ii,66o
^\ .'" 4.4'06
.^1.800
vv 5.200
-'•'.-'! 9.660
..•^^"13,666
' /'••••,. 30,000
21.000
NA'
, '•=^,8260
NA
cio
•=256
<5O0
KSOO"
clOPO
'1.9
.^10
cl.o
cl.O
cl.O
cl.O
tl.O
.^1.0'
NA
Clio
NA
<W
^50
<'sd6
<500
<iooo
cl.o
y^~.'s^ -^'i.
Monitor well was noi installed
2
18
- 58
3 "7
"""i."7
\-^
NA
NA'
353
.. *1'^
318
357
296
306
327
'366
"238
""" 331
271
244
"284
NA
279
~ M92
't. ' '• 76
-86
.•/, . :120
';-'-"r..^i26
-.- - 10Q
•i^" • 1:139
'l*-'"; -'160
300
- ,•.140
1-: • .120
1 390
• V"-- iso
120
NA
'"i" '" ".'1.70
'I'ao
NA
t5.0
tl 0
c2.5
t2 5
c2 5
ci.o
cl.b
.ii'b
'Tl.O
tlO
cl.o
tlO
cl 0'
NA '
c2'.6
cl.O
NA
c50
cio
c2 5
c2."5'
c2.5
cl.O
cl.o"
c'l 6 "
cl.O
c'l.O
cl.O
cl 0
cl.O
c2.'6 "
cl.O
Moniior iveli waa not installed
NA
NA
253
236
221
221
236
347
273
259
23a
519
271
524
539
NA ""
177
340
290
•-•, ' '320
y 390
' '•- ' '-'2B0
'•'864
. '-' 350
:"440
. _ 740
"r- 530
.- 440
1400
1200
•-' 6300
NA
VV 630
- 380
NA
c5.6 " "
c50
clO
c'lO
tio
1.6
cl 6
A\ 0
cib
cl.o
tl 0
cl 0
ci.o
NA
c2.'0
cl.O
NA
c5b
c5.0
<fO
<10
<10
cio
cl 0
cl 0
ci.o
tl.O
cio
cl.o
dO
t'2'.O "
tl 0
Nitrate. Nllrale + Nllrlte
(10 mg/L)
53
"5.7
4.6
<o'.i
4
52
4.3
4.6
4
1 4.1
4
2.2
' 2!e
t .'-^'y-.}J=i:..y '^^.•2
' ' -^ ^ Tl^' '** "v" •J-^ .'AT A
--r--*... . ••••32
1
22
1.1
1.8
1.9
1.5
1.2
3.7
NA
-452
^5. .-^ ki.^,-. ^^10.1
"29
lis
Zl
9.4
2.E
3.'5
4.2
'2.3
"'2.1
56
0.9
8
4.44
551
5.1
1
NA
.:=y^^,. -:-=. -1,14.6
'^ '•i'y-r=y\_--^.'\o 1
"9 6
85
--•- "-i^^". '=~y-r'''^'To.2
'a.a
B.7
' 87
86
"8 6
'6.3
•_ :t -^ 'y- -^ 14.3
' "se
7.57
a
NA
8.3
1
NA
-'--'- '- •'ie!2
• --£."•> -"i^' - •-.•i5.7
= f:^ .--,• = • 15.1
'.:: ••'- -r^ y_ ..."15;
-•- ' .y^ -:"ri4.3
^'.--'I "•-' .^ '•'14.5
^--' '.--: -"r:.7--.',15 9
;• .:•• '=:''^-:"'="'20 9
•• r_ r: :--:- /^..19 3
•.":-. !" ;>-' '^ i'9.:
-..=••'.-3 /=.' y '-jBB
'...: ^: -..y'- •''?'-• 39 1
•••.•^-^•^.-;-.--^ -•41.9
• ,. y. ' - li-38.7
;X.-':- • ^- A7.^^36.3
NA ' ' '
,:"•. .—-''.- _jr.20.7
NA - not analyzed
NS = not sampled
Shaded indicates concentrations exceeding GWOS
Bold and Italics indicates me MDL exceeded the GWQS
Isl Qtr = January . March
2nd Oil = Apnl - June
Srd Otr = July • September
41h Qti = October - Decembei
. TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 1 ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
IWell
Sampling Evert
rW4-23
2nd Qtt 6/27/07
3nd Qtr a/15/07
4th Qtr 1(V1{V07
1StQlrl28fle
2nd Qtr 6/250)6
3rd Citr 9/1 (V08
4th Otr 10/1 &08
4th Qtt 11/18/09
1atQtr:V4/09
TW4-24
2nd Otr 6/27/07
3id Qtr 115/07
4th Otr 10/100)7
1st ar 128^6
2nd Citr a/2a'08
JrdOirS/'iCrte
4thQtr1CV15/OB
Ith CHr 11/18/09
1st Qtr 14/09
TW4-2S
2nd Citr 6/270)7
3rdOtrB/l5»7
4th Citr 1(V1CV07
Ist (itr 12ft08
2nd'Citr6/25/0e'
3rdOtr9/10«B
4thQtTlCV1&0e
4th Citr 11/ia/09
Isl Qti 14^39
Cartmn Tetrachloride
(SMS'L)
c1.0
cl.O
cl.O
<1.0
cl.O
cl.O
NA
c2 0
cio
cl.O
cl.O
cio
cl.O
cl.O
cl.O
NA
c2 0
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
NA
c20
cl 0
Parameter
GWQS
Chloride
No GWQS
47
46
43
41
41
35
51
NA
41
770
791
692
740
' 834
1180
1130
NA
i'b'ib
395
382
356
374
344
333
366
NA
332
Chlorofonn
CTOpgn.)
clO
cio
clO
clO
cl.O
cl.O •
NA
c2 0
tl.O
26
2.2
1 5
1 5
14
2.9
NA
c2.0
14
cl.O
2.2
cl.O
tl.O
ClO
cl.O
NA
c20
cl.O "
Chloromethane
OOpgfl.)
ci.6
cl.o
cl 0
<:1.0
^10
cio
NA
^2.0
cl.O
clO
c:1.0
cio
cl.O
cl.o
cio
NA
c2 0
cib
cl 0
<io
cio
cto
clO
clO
NA
c2 0
<10
. . — —^^^^^
Methylene Chloride
(5pg0-)
cl.o
cl 0
ClO
tl.O
cl.o
cl.O
NA
<2.0
cl.O
ClO
<1 0
cl.O
cl.O
cl.O
cl.O
NA
c2.0
cl.O
cl.O
cl.O
<1 0
cl.O
cl.o'
cl.O
NA
t2 0
cl 0
Nitrate. Nitrate •f Nitrite
(10 mg'L)
c0.1
cOI
cOI
cO.1
cO.1
tO05
c0 05
NA
cO.1
'^r>z-:'^.'.:.-'.'^'-^-'2G.]
^•^^^-%.2S
",..-•^•-1 ;^_ -='247
.- J: ^-....•1- '^- 24.4
^..7- :•... -r/C-'-v45.5
•-.•-_=. ^•.. ,-:.v^-'-38-j
-v"-~ ,;_ = t«-^^ ..44.t
NA
. • -^• -^ •""-. .,.-.30.6
•,3'.v^:fr-S^i7.i y-^: I < 2« ymmi
- ^- -• i- .- . 22.1 '^•^'^ =^^ >^.i8:8
7:^_.-v=. ^fc.S-2J,-
NA
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 1 ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHrTE MESA MILL
Well
Sampling Event
Parameter
GWQS
Carbon Tetrachloride
15 »T-)
TW4-eO (Dl Blank)
ISI Qtr 116*5
Znd Otr 5'25A>5
Srd Otr 8/31/05
41h Citr 12/7/05
1st Qlr 19036
2nd Olr a/140)6
4th (itf 11/8/06
1st (itr 2/28/07
2nd CHr 6/27/07
Srd (itr 8/15/07
4mOtrl(V10rt37
1stQtr3/28ffl8
Jnd Olr a^5rt)e
3td Otr 9/8/06
1st Qtr 1109
TW4-62
1st Qtr 3/109
2nd Olr 5/25/05
Srd (itr a031/O5
4th (ilr 12/7/05
lat Qtr 19/06
Srd Otr 7/2106
Ist Qtr 2/260)7
2ivdl'Qtt 6/2'7i'07
3niaa&\5n7
4th{ilria'1CV07
1stOtrl28/0S
2nd Qtr a'25'68
Srd (ilr 9/a036
1st Qlr 3/100
NA
NA
cl.O
cl.O
tl.O
cio
cio
<1.0
cl.O
cl.O
cl.o
cl.O
tl.O
cl.O
cl.O
Chloride
Ho GWQS
NA
NA
NA
cl.O
tl.O
cio
Cl.O
cl.O
cl.O
cl 0
cl.O
cl.O
cl.o
cl.O
cl 0
Chloroform
(70pgrt-)
cl 0
37.6
2.7
cl.O
cl.O
cl.O
tl 0
25
'-? 190
tl 0
5.7
1.1
13
3
33
Cam tind reason for TW4-a2 in texted
tl.O
NA
<« <100
<50
<50
tl 0
cl.O
cl.O
cl.O
cl.O
tio cio
cl.o
TW4-65 (dup Of TT«4-20)
4thCilr 11/6/06
1st Oti 2/28/07
2nd Otr &27/67
3rd (ilr a/15/07
4th Citr 1CVI(V07
1 SI Otr 128/06
_-=r- .- 37
'•7^-'-^:::^^
1.9
•;•:-- .•:'•-,- ••is
3.2
-y • •': ' -.$2
TW4-65 (dup of TW4-5)
4"t"h"(5r il/B/0"6 |cld
TW4-65 (dup ol MW-32 lormer TW4-17>
2nd Otf 6/25/08 tl.O
Isl Ql'r 14/09 cl.O
r«4-65 (dup Dl TV*4-3)
3idQtrg/100)6 |cl6
TW4-70(duporTW4-2}
lst"6r 1.4/69 I2.I
TW4-70 (dup ot TW4-8)
2ndbir'a^e^ba |ci.6
TW4-70 (dup of MW-26 lormer TW4-15)
1st Qtr 2/28/07
2nd Qtr 6.'27/07
3id (itf 8/15/07
4th Otr 10/10/07
cl.O
tl.O
cl.O
cl.O
TW4-70 (dup of MW-32 former TW4-17)
lStQtr3/280)B
Srd Olr 9/1 (V08
TW4-73
Srd Qtr 9/909
TW4-73
1st Olr 11109
cl.O
tl.O
tl.O
NA
NA
51
52
46
tl.O
c1.0
cl.O
cl.O
cl.O
c'i'.O
cl.O
cl.O
125
139
125
137
176
137
56
29
31
18
44
45
55
53
51
58
31
31
34
. .3.500
..-"r-^3.100
-- • 3.200
. . - 3.300
.-: •^:i-:2.800
20
50
cio
1
1.5
cl.O
3
10
--=" 13.700
.^16.000
;: 1.700
'": . 27.000
.- ' 3.600
• -12000
53
cl.O
cl.O
cl.O
3100
tlO
41
= 400
• 440
-•. -.1.700
cl 0
clO
Cam find reason for TV/4-73 in teicted
cio |c1 III
Cant tind reason for TW4-73 in texted
cib [cl lis
Chloromatharw
(30 (ign.)
NA
NA
2 4
cl.O
15
1.1
1.3
<1.0
ClO
cio
cl.O
tl.O
cl.O
cl.O
tl.O
tl.O
NA
c25
<100
<so
<so
cl 0
<1.Q
<1.0
cio
cl.O
14
cl 0
cl.O
1.8
cl.O
<10
cl 0
cl.O
tl.O
ci 6
cl.O
tl 0
cl.o
cl 0
cl.o
cl 0
cio
<1 0
cl.o
cl 0
cio
tl 0
cl D
Meihylene Chloride
(Sp^n.)
NA
NA
tl.O
<1 0
cio
cl.o
cl 0
cl.O
cl.O
cl.O
cio
cio
cio
cio
cl.b
ClO
NA
<25
<100
<50
<50
cl.O
c10
cl.O
tl.O
tl.O
ClO
cio
cl 0
22
1
clO
clO
2.2
1.2
cl.O
tl 0
cl.O
cl.O
tl 0
cl 0
cl.O
IB
cl.O
cl 0
cl.O
tl.o"
clO
clO
Nitrate, Nitrate -H
(10 mg^L)
cO.1
cO.1
<01
<01
cO.1
cO.l
cl
cO 1
<01
cO.I
<0 1
cOI
c0.05
c0.05
t0 05
<0.05
"^^ ''."• .yc- '"•"
cO.l
tO.l
cOl
cO.1
c005
cO.05
tO.1
c0 05
cO.l
272
7
tl.O
cOl
c0 05
c0 05
c0.05
1
^Jilrite
, 102
66
6.E
e.i
54
P'
1.5
4.;
l.£
4
5.;
4.6
6.7
8.1
06
0;
06
NA = not analyzed
NS = nol sampled
Shaded indicates con centra! I ons exceedlnfl GWQS
Bold and italics indicates the MDL exceeded ihe GWQS.
15t (ilr = Januaiy - Man^h
2nd Otr = April • June
3rd Citr ^ July - September
4th Otr - Oclober - December
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Inspection Forn^F,,
"* warter 2008
Utah Radiation Control Inspection Form
Chloroform Contamination Investigation
4th Quarter 2008 Ground Water Monitoring 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'*).
QAP enforce on June 20, 2008.
• Groundwater Discharge Pennit No. UGW370004 (hereafter "Permit"). Permit
enforce on March 17, 2008.
Date of Inspection/Report Review: June 30 and July 1, 2009
DRC Inspection Staff: Dean Henderson
Were Violations Recommended: Yes
GROUNDWATER MONITORING REPORT
1. Was the 4th quarter 2009 Groundwater Monitoring Report (hereafter "Report") submiited
to the DRC by March 1, 2009 as required Part I.F. 1 of the Permit and section 11 of the
QAP?
Yes. The report was submitted DRC on February 26, 2009.
Violation: No
2. Was lhe decontamination procedure for all sampling equipment follow the requirement in
section 6.2.5 of the QAP? No. According to section 2.2.1(b) of the report: "Before
leaving lhe Mill office, the pump and hose are linsed with de-ionized ("DI") water.''
The pump used to purge the wells was only rinsed with de-ionized waler prior to purging
activities.
Violation: Yes. Part I.E.l(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 ofthe
QAP? Yes
Violation: No.
Well
MW-I
MW-2
MW-3
[vrw-4
MW-5
MW-I!
MW-12
MW-13
MW-14
MW^15
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-I0
TW4-n
TW4-12
TW4-13
Yes
Yes
Yes
Yes
Yes
Ycs
Ycs
Yes
Yes
Yes
Yes
No
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
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
4. Were there Field Data Work Sheets for each Monitoring Well have the information listed
Part l.F.l(a) and in section 7.1 ofthe QAP? No Violation: Yes
The field data work sheet for TW4-14 record 6 gallons of water purged with no recorded
field parameters (see table 6).
5. Where purging procedures followed as required in section 6.2.7(v) of the QAP (see table
4)? No. Violation: Yes.
No field parameters recorded at TW4-14. There where one set of field parameters
recorded in the following wells: TW4-1, TW4-2, TW4-3, TW4-4, TW4-5, TW4-6,
TW4-7, TW4-8, TW4-9, TW4-I0, TW4-1 L TW4-12, TW4-13, TW4-16, TW4-18,
TW4-21. TW4-22, TW4-23, TW4-24, and TW4-25. Parameters were measured prior
to purging the required two casing volumes (.see Table 4).
6. Were water quality QC sajnples collected as required in section 4.3 of the QAP (see table
below and Table 2)? No. Violation: Yes
Sample
Duplicate for each batch
of 20 samples.
Trip Blank foreach
cooler shipped with VOC
samples.
Equipmeni Blank for
sampling equipmeni in
contact with the
groundwater (Pumps,
bailers elc).
Yes/ No
no
yes
yes
Violation
yes
no
no
Comments
Only one duplicate sample was
collected. TW4-65 a duplicate of
MW-32.
One equipment blank identified as
TW4-63
7. Were all the required compliance monitoring parameters analyzed for each compliance
monitor well as required in section 4 of the Appendix A of the QAP? no.
Violation: Yes, Chloroform, Carbon tetrachloride, Chloromethane, Methylene
Chloride, and Chloride.
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
TW4-1I
TW4-12
TW4-13
TW4-14
TW4-16
TW4-I8 J
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
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
yes
ycs
yes
yes
yes
yes
yes
yes
yes .
Chloroform
70 Mg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
yes
yes
yes
yes
no
yes
yes
yes
yes
ves
Carbon
tetrachloride
5M&/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
yes
yes
yes
yes
yes
Chloromethane
30 Mg/L
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
ves
yes
yes
yes
yes
Methylene
chloride
5 MgA.
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
yes
yes
no
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
yes
yes'
yes
no
yes
yes
yes
yes
yes
1. Nitrate + Nitrite as N
8. Were all groundwater quality analyses performed with a minimum detection limit or
reponing limit less then its respective GWQS (See Table I)?: yes
Violation: no
9. Did sannples arrive at the contracted laboratory below 4°C as required in section 6.2.12(e)
of the QAP? Yes. According to the chain of custody documeni provided in Energy
Laboratories analytical summary report that is provided in Attachment H the Report,
samples arrived at a 2°C .
Violation: No
10. Were the compliance monitoring parameters analyzed by excepted EPA analytical
methods as required in Table 1 in section 8.2 of the QAP? Yes (see table below).
Violaiion: 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-I3
TW4-I4
TW4-16
TW4-18
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-60
TW4-63
TW4-65
TW4-70
TW4-73
*Trip Blank
Parameters with Iheir 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
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
tetrachloride
SW8260B
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1
Yes
Yes
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
•^ot Analyzed
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 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-i0
TW4-U
TW4-12
TW4-I3
TW4-14
TW4-16
TW4-I8
TW4-19
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-60
TW4-63
TW4-65
TW4-70
*Trip Blank
Parameters with their holding times
^"Nitrate
28 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Ycs
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
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
Yes
Yes
Yes
Yes
Yes
Y'es
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
Methylene
chloride
14 days
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
^Jot Analyzed
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
12. Did any of the compliance monitoring parameters exceed groundwater quality standards
(GWQS) [See Table 11? Yes.
Nitrate, Nitrate -\- Nitrite: TW4-19, TW4-22, TW4-24, and TW4-25
Carbon Tetrachloride: TW4-I9
Chloroform: MW-4, MW-26, TW4-1, TW4-2, TW4-4, TW4-7, TW4-10, TW4-11,
TW4-19, TW4-2I, and TW4-22.
Methylene Chloride: MW-26, and TW4-16
Violation: Yes
13. Were QA/QC objectives meet for measurement of data (precision, accuracy,
representativeness, completeness, and comparability) as required in section 3 oflhe
QAP? Yes. See Details below.
Violation: No
Precision (see Table 2): Duplicate sample for MW-32 (TW4-65) were within the
20% relative percent difference. Therefore the data set passes the precision
guidelines.
Representativeness (see Table 2): Duplicate sample for MW-32 (TW4-65) were
within the 20% relative percent difference. Therefore the data set passes the
representative guidelines.
Completeness: Is based on precision, accuracy, 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
sampies are within expectable recovery ranges for accuracy.
Comparability: Is based on sampling conditions, collection techniques, measurement,
procedures, methods, and reporting unils. After review of the data and reporl il
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 of the QAP (see Table 3)? Yes
Violation: No
15. Was analyses preformed by a State of Ulah Certified Heath Laboratory as required in
section 2.5 of the QAP? Yes. Laboratory: Energy Laboratories, Certificaie
NO.WY00002.
Violation: No
16. Did the Report include all reporting requirements as required in section 6 of Appendix A
ofthe QAP? No.
Violation: Yes
The following are missing repoiting requirements:
1) Part of section 6.c of Appendix A requires: "Analytical results for each well
summarized in a data table, that includes historic analytical results for each well."
Historic analytical results for all wells for carbon tetrachloride, chloride,
chloromethane, and Methylene chloride is missing.
2) Part of section 6(c) of Appendix A requires: "...3) depth to groundwater measured
and groundwater elevation from each monitor well summarized in a dala lable, thai
includes historic groundwater level data for each well.... "
The CMR did not include a lable with historic groundwater level data for wells TW4-
23,TW4-24,andTW4-25.
3) Part of section 6(c) of Appendix A requires: "a current chloroform isoconcentration
map with one ofthe isoconcentration lines showing lhe 70 pg/L boundary, "
The Report included a current chloroform isoconcentration map but it did not show a
isoconcentration line showing the 70 itg/L boundary.
4) Part of section 6.c of Appendix A requires: "Calculate chlorofonn 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 quaner and. 4) total chloroform mass removed
form each pumping well for the quaner."
No calculated chloroform mass removal by the pumping wells reported in the Report.
References
Denison Mines (USA) Corp., June 2008, White Mesa Uranium Mill, Ground Water
Monitoring Quality Assurance Plan.
Denison Mines (USA) Coip., November 2008, White Mesa Uranium Mill Chloroform
Monitori ng Report 4th Quarter (October through December 2008)
Stale of Utah Division of Water Quality Departmeni of Environmental Quahty, March 8,
2005, Ground Water Discharge Permit for Denison Mines (USA) Corp. at the White Mesa
Mill Facility Near Blanding, Utah.
References
Denison Mines (USA) Corp., June 2008, While Mesa Uranium Mill, Ground Waler
Monitoring Quality Assurance Plan.
Denison Mines (USA) Corp., November 2008, White Mesa Uranium Mill Chloroform
Monitoring Report 4th Quarter (October through December 2008)
Slate of Utah Division of WaterQuality 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.
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 4th OUARTER 200B
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
NA = not analyzed
NS = not sampled
Shaded indicates concttnirailcra exceeding GWQS
Bol(J and italics indicates the MDL exceeded the GWQS
I51 Otr = January - March
2nd Qtr = Apnl - June
3rd Otr = July - September
4th Otf = Oaober - December
Well
Sampling Evefit
MW-a
istOtr3/16A)5
2nd Qti aSSflS
3rd Qtr 8/31/05
4lfiOtr12l7«)5
isi Qtr 3/9/O6
2nd Qtr 6/14/06
3rd Qtr 7/2tt06
4ihOtrn/Ert)6"
IslQIrE/EftW
2nd Otr 6/27/07
3(dbtr8/i5rtl7
4th Otr 1Cyi(V07
lstQtr3/2fl«a
2nd Oti 6/25™
ardOtrSVlCVOS'
4ttiOtr 1Q/15/0B
MW-4A(TW4-A)
1stOtr3/'l6«5
2nd Qtr 5/25/05
3rdQtra'31/05'
4m6ir'l'2/7/05'
istQtr3/9/06
Snd Olr on 4/06
3rd Oir 7/20/05
aih Olr 11/6/05
131 Otr 2/28/07
Parcmeier
GWQS
Carbon TMrachlorlde
(Spgt)
NA
NA
<ib
<so <so
<50
<so
NA
i^A
<io
<50
<so
<50
MW-2e(romierTW4-15)
Isl Qtr 3/16/05
2nd Oir 5/2^5 '
3rd'Otr 8/31/05'
ith Qlr 12^705
laidlr'iBvOe
2nd Otf'6/14/06
Srd Otr 7/20rt)6
4tliOtr 11/8/06
Isi Qtr 2/28/07
2nd Qtr 6/27/0?'
3rdOtra'1S'07
4ttiQtr l(yi0/07
1stOtr3/28/0S
2nd Qtr 6,^5-08
3(d Qtr S'l0/08
ith Qtr 1CV15/b8'
flthQtr'il/l&OS
NA
NA
<5.0
<5d
<50
<50
<50
<1.0
<1 0
<'l.O
<1.0
<1.0 " "
<1.0
<1 0
<\0
NA
•:2.0
MW-32 (former TW4-17)
1st'btr3/l'a«5
2nd Qtr' 5,25fl35
3rdOlrty3l/05
ilh Qlr 12/7/05
lstQlr3,'9,-b6
2nd Otr'& 14/06
3rd Olr 7/20/06
41h Qlr 11/8/06
lBtOtra-2&'07
ZiW Qtr 6/27/07
3rd Otr S'l S'O?
4tnOtr 10/1QflD7
lslQtr3«2a'08
2nd Olr &25rt)e
Srd Otr 9/10/08
41hQtr10/15'Oe
NA
NA
<1 0
<10
<'i.6
<1.0
<i 0 '
<:1 b
cl d'
<1.0
<'i'.'6' '
<t 0
<i 0
<1.0
<-i 0
<1.0
21
16
1.8
' 1.9
1.7
1.7
18
• 1 8
1.7
24
1.9
Chloride
No GWQS
NA
NA^
NA
53
49
49
48
50
47
45
47
45
42
42
' ' '35
45
NA '
NA'
NA
55
'53
54
" ' 54
54
60
Chlorofonn
(70p9fl.)
'•—-•V2.900
' • 3 170
'• „-- 3.500
.y .:- 3.000
"'•'• ^"3.100
•-, - .^ 3.000
"^^l. . 2.820
-. 2.830
'-'•': ': 2.300
'"'"T 2,000
- '^' 2,600
.' „:- 2.300
"T. 2.400
"'•• • -^ 2.5'06
•>•- ---1.800
•-'-•- -=2.100
• •'.- -~ 3.700
•.y- •• = 3,740
•^3,800
'•'"."'•-i.'3.606
'ii."s3,760
^ -^3.300
•'-•'r''=^''3,'l90
'"l-:^:. 3.370
2,500
Chloromdhanc
{30\igrL)
NA
NA
<10
<so <so
<50
<50
1.4
<1 0 "
-^lO
^10
<10
<10
<10
cl.o
<1.0
NA
NA " "
<:10
<50
<50 '
<50
<i'.'6
<1.0
Methyterw Chlorida
(Spgfl.)
NA'
NA
<10
<so <sd
<so
<so
cl.o
<1 0
<^ 0
cio
•lio
<10
cio
ci.o
cl.o
NA
NA
cIO
<so
-rSO
<SQ "
<50
cl 0
cl.o'
Well tbandcxided
NA
NA
NA
55
52
52
65
54
56
49
57
57
49
57
44
" ' 64
NA
NA '
NA
NA
33
32
' 30
32
31
32
32
31
32
31
29
30
26
"- _•••;" 316
'--'-' ''442
gr;966
;" ". '1.660
••;_ •dl.ioo
'-r.'-z.'iro
- - y.-" 283
•'.- :il:r576
•'•••'360
-• --'1.400
•W-" 2.600
' i''^ '930
^~:": 1.300
• .-T- • 630
NA
'. -^: 1,700
<1.0
<1.0
<1.0
<10
<^.o
<-io
<1.0
<1.0
•cl 0
*1.0
<1 0
cl.o
<t.o
<1.0
<^ 0
<1.0
NA
NA
5.4
<50
<50
•^50 '
<50
<i.o'
<1.0
<i.6
•cto
*10
<10""
•tl.O
<i6'
NA
<2D "
NA
NA
3 2
cio
<1.0'
3.5
1 8
15
<1 0
<1.0
<1.0
' <1.0
<1 0
<io
cl 0
cl.O
NA
NA
c5.0
•.^50 '
<50
<56
<50_
1 _ -. -^ "
~^r.
' .
~--
NA
NA
<1 0
cto
cio ' •
cl 0
clO
ci'6
cl 0
cl 0
c'i 6
<1.0
cl 0
cl 0
..-1 0
cl 0'
NHraie, Nllrale +
(10 mc^)
2.6
: 5.5
"':i3
. -36
. 14
40
^3
34
' NA
166
cD.l
co'.i
cO 1
<0 1
<0 1
cOI
^•'•O
C.I '
cl 0
<1.0
clO
<'t>
cl
^•'•O
cl 0
c0.05
Nllrlte
' "6.3
7 1
•70
7.0
e.'o
6.0
1.2
6.4
63
70
"62
6.2
56
8 1
"64
5.9
71
7!6
6.9
67
58
7.3
1.2
7.1
7.1
OS
0.2
• " 0:2
0.3
0.2
02
• 1.4
OS
"•' 0 6
o'!4
1
0.6
0 I
06
02
01
NA
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 4th QUARTER 2008
CHLOROFORM COriTAMINATION INVESTIGATION
DUSA WMFTE MESA MILL
NA = not analyzed
NS = not sampled
Shaded indicates concentrations a^tceeding GWQS.
Bold and italics indicates the MDL exceeded the GWQS
Ist Qlr -January Mnrch
2ndQtr = Apnl-June
3rd Olr - July - Sepiember
4th Otr ^ Oclober - December
Well
Sampiing Evem
rW4-l
1st'6lr'3/i6/05"
2nd Otr 5/25/05'
Srd Olr evs 1/05 "
4th Qtr 12/7/05"
1st Olr 3^/06
2ndQtra/l4rtl6
Snd Qtr 7/20/06
4th"blr 11/8/06"
1st6ti2/2a'07
2n<j Otr 6/27/07
Srd Olr a/15/07"
4th Qtr 10/10/07
IstOtiSffia™
2"fi"d""Qtr 6^5/08"
3rd Otr 9,'10/06
4ihOir1(V15/68
IW4-2
Mt Qlr y^mi
2hd Qlr 5/25/05
3rd Qlr 6^1/05
ith Otr 12/7/05
isi Otr'3W06"
2ndQtr6/14«)6
Srd Otf 7/2O06
4ih Qtr 11/a06
Ist Olr 2/28^7
2nd Olr 6'27/67
Srd Qtr a/1 &07
4th Qtr 10/10/07
ISI Qtr 3/2&0a
jnd QIC 6/25/Oe'
3rd Otr WICVOS
ilh Qtr 10/15/08
ith Qtr 11/19/08"
TW4-3
lai Qtr 3/16/05
2nd Qlr 5,'25/05
SrdQtr"a'31/05""
ilh Qu 12/7AJ5
l3t"bl"r"3/*06
Znd0tr&-I4y0e
3r"d"Qtr7/2CV06
4th" Qtr 11/8/06"
lBl""Qtr"2/2a/07
2nd Qlr 6,'27/07
3rcJ"Qtr a/15i07""
4th Qtr ICVIO'O?
1st Olr 3,28/08
2nd Otr &-25/08
Sr"d"6irafiaD8"""
4th Qtr IfflSAW
TW4-4
1»lOtr3/16,05
2nd Qtr 5.2SWS"
Srd Qtr SfSl/OS "
4th Qlr 12/7/05
Isi Olr"3^/06
2ncfQtr6/14^06
Srd Qlr 7/20/06"
4tK Qtr 11/8/06"
1 sl Oil 2/28/07
2nd Qlr 5/27/07
Snd (Dir 6^15/07
4th Qlr ICVIQ/67
1stQlr3/2a08
Znd Otr ^25/08
3rdQir9;1(V0e
4mQir 1tV15/08
4tK'6i"r""l 1/18/03
^^^^^^^^^ Pa time ter
GWQS
Carbon Tetrachloride
(5 JJ9/L>
NA
NA
<W
<50
<S0
<sb
<so
NA
NA
<5d
<50
<so
NA
NA
NA
cl b
cVo
ClO
cl 0
cl.O
cl.O
cl.O
cl.O
cl 0
cl 6
c!0
cl 0
cl 0
cl.O
NA
NA
<10
c«
<50
<50
<50
1.4
1.2
14
13
1.3
1.3
l!l
1.3
1.3
2.3
"i"8
2.5
2.2
2.1
2.3
2.2
2.4
2.4
l"?
"15
1.7
1.5
"l."5
16
1.5
14
NA
c2 0
Chloride
No GWQS
NA
NA
NA
52
49
48
51
47
47
"45
43
43
39
39
"35
41
NA
NA
NA
"58
56
56
54
55
54
50
49
51
48
46
42
47
NA
NA
NA
NA
26
26
26
26
23
22
23
24
27
21
19
19
22
NA
NA
NA
S4
Si
48
50
49
49
"47
"" 45
47
43
"<2
39
44
NA
Chloroform
pOpg/L)
;_— ""2.700
'-•4',- :'"3.680
.€^ ''2.eoo
- "2.400
\^-:-" 2.700
." -l.:-i;" 2.200
- , =f 2,840
^--•-•"'-^•2.280
^^••-••1.900
• ^>l""i,966
:^='2.300
I.'r i.-l 2,000
'^\:"'2,000
'^" "•."'1,960
„=r.,-V^1.766
y^ "•"'1.700
• v-t-^^3.760
..=,•^"•""3.756
=- -"" "3.600
-.;;. 3,500
-^.=/>;3.800
• fiifS.lQO
ikfi 4,120
^""•3.426
•f^:2.300
"• "-^^3."oo6
5: .''^340
"" •.•••3.200
±-': "J3.300
• 1^3.100
r''ir^2.866
NA
':• •iii?: 3200
cl 0
cl 0
cio
cio"
cio
cl.o
cl.o
c"i."6"""
cio
cio"
cl 0
cio
cl.o
cio
cl.o
cio "
""-: " "3."100
^ ^ . 2.400
yy 3.200
-^^"2.806
""^ 2.966
-•".•••"2.600
..--- 2.850
•^y" '2.670
:7 "-' 2.200
-- •- 2,400
- ri s.'^oo
=' ".: "2,560
•"?^" 2.800
• T*-^ 2.500
. i.S^. 2.200
NA
2.500
Chloromethane
OOygfl.)
NA "
NA
cio "
<sd
<so
<sd'
<50
<i'.o
<i.6
<i.6
cio"
cl.o
cio
cl.O
cl.O
cl.O
NA
NA" "
clO
<50
<S0
<s6
<50
cl.O
cl.O
cio
cio
cl.o
cl 0
cl.o
cl.O
NA
c2.0
NA
NA
"6 4
cl.O "
2.3
1.6
2.2
cl.o
cl 0
cl.O
•cl.O
cl.O
cl.O
cl.O
cl.O
cl.o"
fjA
NA
cio
c50
<50
<5Q
<S0
cl.O
cl 0
cl.O
cl.O
cl.o""'"
ci.o'
cl.O
cl.o"
NA
"c26
Methylene Chloride
15 ugrt-)
NA
NA
<10
<SQ
<sd
<sd
<50
cl.o
cl.o
ci.o
ci.o
<1 0
cl.o
cl.o
cl.o
ClO
NA
NA
<50
<S0
<50
<S0
cio
<i.6
cl.o
cl 0
clO
ClO
cl 0
cl 0
NA
c2 0
NA
NA
cio
cl.O
cl.o
cl 0
cl 0
<10
ClO
c-1 0
cio
<i.6
cl 0
cio
cl 0
cl.O
NA
NA
<to
<so
<50
<50
'<50
cio
*10
cl.O
cio
cl 0
cl.o"
clO
cl 0
hIA
c2"6
Nitrate, Nitrate + Nitrite
(10 in g/L)
"9.1
"•i" "•--•>-"-"""•'•.- "" l~<-i6e
9E
9.7
94
9 6
""- "gia
8.9
" •g
8.4
7.E
76
8.68
8.15
9 3
y."7
86
8 0
7.8
7 5
7.1
"7.4
76
7.3
" " 7J
" "73
" 69
6:9
74
71
8.0
NA
3 5
" "3:7
""" 3.5
. 3"a
- -3; J
7.1
"" 29
is
"""3!i
3.3
" """is 1
26
2.8
2.9
"27
26
106
„„y.- -,\ •• =- "•• i"i s
9 9
'2y^ :^l':^^"V:ip:2
95
86
"97
" " ..J-.J. --- ^lo 1
90
"94
" 9.5
9 5
9 2
:', "— '"yy y "los 3 8
" W
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 4lh QUARTER 200B
CHLOROFORM CONTAMINATION INVESTIGATtCN
DUSAWHFTE MESA MILL
NA - not analyzed
NS = not sampled
Shaded indicates concentrations exceeding GWOS.
Bold and italics indicates the MDL exceeded the GWQS
1st Otr - January - March
2nd Qtr = April • June
3rd Olr - July - September
4lti Qlr = October - December
Well
Sampling Event
TW4-5
l9tOtr^l&05"
2ndQtrM5/05
3rd Qlr a/31/05 "
ith Otr 12/7/05
1st "otr 3W06
2nd Otr ^14^
3ld"oir7/2Q''68
ilh Qlr 11/8/06
1st Qtr 2/28^)7
2nd Qtr 6/27/07
3rd Otr 8/15/07
tth Otr 10/1CV07
Ist'otr 3/28/08
2nd Olr 6/25/08
3rd Otf 9/10/08
ilh Qtr ttVI 5/08
TW4-6
ist'Qlra'i"iiD"5"
2nd Qlr 5/25^05
Srel Qtr 8/31/05
ith Qtr 12/7/05"
1stOlr3/9/06
2ndCttr"6/14/06
3fd Qtf 7/2li06
ith Qlr 1 t/froe
Ut Qlr 2/28/07
2nd Qtr &27/07
Srd Olr 8/1^07
4tti Qlr 1Cyi0rt)7
Isl Oir 3-28/08
2ndQtr6/25rt)8
3rd""Qlr9/1Cv"03
4th Qtr 10/1^08
TW4-7
lst"Otr 3/16-05
2nd Qtr i-2&05
3rd"6l"r"a'3i/05
ilh Qtr 12/7/05
l3t Qtr 3/9/06
2"ri"d" Qtr 6/14^)5"
3rd Otr 7/20^6
4th Olr 11/8/06
1StiQtrZ'2&D7
2nd Qlr &27/07
3id Otr 8/15/07
4iti"0lr 10/10/07
1st Qtr 128/06
2nd Qtr 6-25/06
3rdQir9'1(V08
ith Qtr 1 (if 15/08
4ihQtr 11/18/08
TW4-8
1st Otr a'16'05
2n"cj Olr 5,25/0f>
3rd Qlr 3/31/05
ilh Olr 12/7/05
i"al Otr :i'9/06
bnd Qtr ^14/06
3rd "Olr 7/20/06"
ittiOti 11/8A)6
1st Qlr 2/28/07
2ncl Qtr 6/27/07
Srd Otr 8/15/07
ilhOtr 10/ItV07
lstQn3/2a'08
2nd Olr 6^5/08
3rdQl(9/10rt)e
4itioir 10/15/08
Carbcm Tetrachlorlds
(Spgfl-)
NA
NA
c2.5
c2.5
c2 5
c2 5
cio
cl 0
cl.O
cl.O
--10
cl.O
cl.O
cl 0
cl.O
<10
NA
NA
ci"6
cl 0
ClO
cl.O
ci.o
cio
clO
cl.O
cl 0
ci""o
ClO
cl 0
cl.O
ci.b"
NA
NA
cTO
'<sd
<so
<50
<S0
1.5
"i'l
1 5
i.4
1.2
1.3
1.3
14
NA
<2 0
NA
NA "
cl.O
cio
cl 0
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.b
cl.o
Paramster
GWQS
Chloride
No GWQS
NA
NA
NA
56
52
" 51
" 54
"55
57
45
" " 38
39
36
"" "3-7
34
"37
NA
NA
NA
" " " "32
31
30
"37
65
32
38
36
35
33
35
"35
33
NA
NA
NA
52
48
47
51
49
• " ^47
45
44
" "45
43
43
35
40
NA
NA
NA
i^A
41
39
37
39
40
39
42
42
43
46
"45
39
44
Chlorolofm
(70p9fl-)
-?y 120
-•r; -113
„ ^ j~4,-?gg
63
66
51
53.7
47.1
35
26
92
9.4
n
9.3
11
10
ci.o
2.5
10
i"7
"31
19
11
42.6
^48
11
18
18
52
24
39
37
,. '-y='i'.ioo
y}} "=2,-7"00
:"''>3.i6o
c. ••''r2.500
"--':. 1,900
••-""'""^,266
=' •'" 2.i46
V" "'-2.i60
"':-"':i."836
f^.- -2.600
.;-' 2.300
•;V.^'^i",960
^-. --2.200
--;••, r 1,800
=4, • 'i.eoo
NA
2.500
10
cl.O
l.-l
cl.O
1.3
1.8
ci.o
cl.O
2 5
2.5
"1.5
35
cl.O
cl.O
cl.O
cl 0
Chloromethane
(30 ran.)
NA
NA
5.8
2.5
31
3.1
cl.O
cl.O
ci!6
cl.o
cl.o"
ClO
cl.o
cl 0
cl.O
ci.o
NA
NA
2.8
1.3
cl.o
cl.o
cl.O
cl.O
ci.b
tl.O
cl.o
cl.o"
cl.O
cl.o
cl.O
cl.O
NA
NA
cio
<50
<50
<5d
<S0
cl 0 "
cio
cl.o
cl.O
c i.O
cl.o
<i 0
cl.o
NA
c2!o
NA
NA ""
1.7
cl 0 "
"2.1
1.0
cl.b
cio
cl.O
cl.b
•^1.0
cl.o """
ci.o
cl.o
cl.b
cl.o
Mathylene Chloride
(SpBfl.)
NA
NA """
c2.5
c2 5
c2."5"
c2.5"
ci'.O
C-I.6
cio
•cl.O
<i.b
cl.o'"
ci.o
cl.o
cl.o
cl.O
NA
NA
cio
ci.o
ci.b
cl.o
ci.o
cio
dO
•cl.o
cl.O
ci.o"
cl.o"
ClO
cl.o
cl.o
NA""
NA
<10
<so
<so
<so '
<50
cio
cl.o
cl.o
cl.O
cl 6
cl 0
ci.o
cl.o
NA
c26
NA
NA
NA
cl.O
cio
cio
cl.O
cl.O
cl.O
ci".6
cl 0
cl.o
cl.O
cl.O
ClO
cl 0
Nitrate, Nitrate + Nltrtte
(10 mg/L)
4 9
3.7
60
6.0
6^0
59
. 6.7
"2.9
7.8
70
7.7
82
7.4
6.7
7.9
9.3
0.2
0.4
0.8
09
1.2
10
0.6
1.4
1.8
0.6
07
08
I.i
0.9
1.1
1.0
5.2
5.4
5 2
•' " "5.3
1
4:5
4.7
4.6
6
5 1
4.7
4.7
4.2
4.8
i 16
4.01
NA"
cO 1
02
cl".0
ci.b
oia
cl.o
0.1
c 1
07
0.*
cl.o
0.5
6.1
cl.o
c605
cb.05
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 4th QUARTER 2008
CHLOROFORM COm'AMINATION INVESTIGATION
DUSA VmiTE MESA MILL
NA - not analyzed
NS = not sampled
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL exceeded the GWOd.
1 si Qtr = January March
2nd Qlr = Aoril - June
3nj Qlr = July • Sepiember
4th Qtr = October - Dec»mber
Well
Sampling Event
TW4-9
IstOti"3/l&'05
2nd Qtr 5/25/05"
3rd Oir 6,31/05
imOtr 12/7/05"
lstQlr3/9/0e
2nd Qtr S'l4/06"
3(d Otr 7/20/06
Mh Qlr 11/8/06
1st Otr 2/28/07
ZndOtr ^27/07
3rd Otr 8/15/07
4th Qtr 10/10/07
1st Qtr 3^6/08
2nd Qlr e/2S/b&
3(dOir9/1(V08
4ih Otr 10/1&08
TW4-10
1stQtr3'l6/05
Znd Otr 5/25ra5
Srd Otf 8/31/05"
ith Qtr 12/7/05
Ist Olr 19/06
Znd Otr"& 14/06
Srd Qtr 7/2*06
ithOtr 11/8/D6
1siQtr2(2a07
Znd Qlr 6/27/07
3rd Qtr 8/15/07
4tbar 10/10/07
1st Oil 128/08"
?nd Otr 6/25rt)e
SrdQtr9/1CV06
itnQtr i"a"lE^08
JttiQlr 11/1B/D8
TW4-11
lstOtr"3'ia/05
2nd Qti S,|25'05
3idQtr""a/3i/05
4ibOir 12-7/05
1st Qtr 19/06
Znd Qtf 6/14/06
Srd Qtf •7/20/06
4th Qtr 1 l/aw"
Ist Qlr 2/28/07
2n(l Otr 6/27/07
3rd Oir 6/15/07
ith Qtr 10/10/07
1st Olr 128/06
2nd Qtr 6/25/68
3rd Qlr 9/1*08
4ihOir 10,'15,0e
4ihOir ii/iaoe
TW4-12
1st Qtr 116/65
2nd Oir 5/25/05
Srd Otr 8/31/05
4"tfiQtr"i"2/7"/05
1st Qlr 19/06
Znd Qtr & 14/06
Srd Qtr 7/20TO
4tlT Otr i 1/8/06
Isl Qtr 2/28/07
2nd Olr 6/27/07
Srd Qtr 8/15/07
4th Qtr lCVia'07
ist Qtr" 128/68
2nd Off 6/25/08
3rdOtr9/1&08
ithOtr lai&OS
Parantetsr
GWQS
Carbon Tetrachloride
(Spgn.)
NA
NA
clO
cl 0
ci 0
ci.b
cl.o
cl.O
cl.O
cl.O
cl.o
cl.O
c 1.0
cl.O
cl.O " "" "
cl.O
NA
NA
c2.5
c2.5
c5.0
c5.0
cS.O
ciid
cio
<1.0
cl 0
cl.O ""
cl.O
c'lio
cl 0
NA
c2.0
NA
NA
<'io
<wo
^50
<so
<sd
1.7
1 3
1 6
1 7
1.6
cl.O
ci."6
cl.O
NA
c2 0
NA" ""
NA
cl.O """"
.1.0
cl.O
cl 0
cio
cl.o""""
cl.O
•rl 6 "
<10
clO
c't.6 "
cl.O
cl.O
cl 0
Chloride
No GWOS
NA"
NA
NA
42
38
39
41
44
44
42
38
40
35
35
28
56
NA
NA
NA" ""
52
50
54
61
58
2
54
59
59
55
" 58
51
61
NA "
NA
NA "
t^A
58
56
56
55
55
54
53
53
53
63
46
42
47
NA
NA
NA"
NA
19
19
16
16
16
16
18
29
16
16
19
16
22
Chl orof or nt
(70 MB"-)
3.8
12
cl.O
cl.o"
cl.O
19
ci.6
cio" ""
clO
""" 21
9 5
87
1.3
1
cl.O " ""
cl.O
•••-..i-lir'.-J.'io
'"6i2!4
-^r\•-• 110
,300
••-•••-. '''• ' .190
-:;:..'i\ 300
^i-.^: 452
"-^•^"T-""'." 500
.'V'-^'":, 250
:'.--4-Geo
-•-j;—y_-470
•"-^•£^;-"620
"•"--'.i^i-"7"26
""-^'fleo
i^A
?--•• 1200
^X4.'406
i=r--"-"3.596
"t?^4.400
T'': •,.•4.400
'—;•".. 4.400
'"".-•^4.300
•-'14.080
.• -• 3,660
''•"3,600
- - "" "3,800
"^•r-4.500
•r-'[^: 4.400
^.^"""346
:-.£:= -. 64C
- ••— 900
NA " ""
"-^•f--1.000
cio
cio
cio" "
cl b
cl.o
cl.o
ci."6""""
cl.o
ciib
cl.o
cl.o
cl.o
cio
ci6'
cl 6"""
cl.o"
Chlorometharw
(30 pg/L)
NA
NA
2.9
cl.O
2.6
2.'7
ci.o
cl.O
<1.0
<1 0
cl.o
cio
ci6
cl.o
•^1.0
cl 0
NA
NA
6.2
c2 5
c50"
c5 0
c50
1 6
cl.O
cio
<i6""
cio
cl.o
cl.O
cl 0
NA
c2 0
NA
NA
cio
c7aj
<so
cW
c50
2.7
cl 0
<1.6"
cl 0 "
cl 0
cio
cio
-:1.0
NA" "" "
c2 0
NA
NA
5.8
1
26
1.4
1.4
<10
ci"6""
cl.o
cio
cl.o
cl 6
cl 0
ci.6'
cl.o -
htalhyiene Chloride
(5M9^)
NA
NA
cl 0
cl.O
cl 0 "
ci.o
cl.o
cl 0
cl 0
cl 0
cl.O
cl.O
clO
cio"
cl 0
cl 0 "
NA
NA
<2.5
c2 5
c5.0"
c5.0
c5 0
cio-
cl 0
cl O"
cl.O
cl.O
cio
ci.6 "" "
cl 0
NA
c2.0
NA
NA
OO
<100
<50
<50
cSO """
l""3
1 8
O.O
cl 0
1.2
•,:1.0
cl 0 """ "
cl 0
NA
c2 0
NA
NA
cl.O
cl.O
cio"""
cl.o
cl.o"""
^1.6""
v-l.O
cib"
cl.o
cl 0
<i.6"
cl.o
cl 0
cl.o
Nitrate, Nllrale + Nllrlto
(10 mg/L)
1.3
^13
13
1.3
"""i.5
1.5
6.9
07
06
13
"is
2
2.1
2".3
2.79
1.99
1.6
0.8
1 1
3.3
24
3.5
6.e
5.7
73
5.1
72
i'.i
7.3
9 9
9 23
• 10.5
NA
87
^. "^ -• -"W:. id: 9 4
94
92
10 0
100
10.0
" ""'^"-/VLV-'O^'
, .. :y .. y=^... ' A10.6
•-^ '• .- r 102
98
7 7
'7.2
79
9 5
NA
1 4
1.6
. i"6
2.7
2.H
25|
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 41h QUARTER 2000
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA V/HfTE MESA MILL
Well
Sampling Event
TW4-13
1st Oil 116/05 "
2ndOtr&2S^05
Srd Otr ao 1/05
4th Qtr 12/7/05
1st Otr 19/06
2ndQtr6/i4/06
3rd Qtr 7/2CV66"
ith Qtr 11/8/06
isl Qtr 2/28/07"
Snd Qlr 6/27/07"
Srd Otr & 15/07
ilh Qtr iCV1ttD7
lsiQtrl28/6a
Znd Qtr 6/25/08
3rij""Qtra'"icy68"""
ith Qtr 10/1 &oe
TW4-14
ist Qlr 116/05
ZndQ"tf"5/25AJ5
3rd" Olr af3l/65
4th Qlr 12/7/05
1stQtf3fl/06
2nd Otr 6/14/06
Srd Otr 7/2(V"b6
ith Oil n/abe
isrQtr2/2"a/67"
2nd Olr &27/07
3rdQtr8/l5A)7
ith Qtr ia'ia'07
Ist Olr 128/08
2nd Otr a^SOO"
3rd Qtr 9/10/08
ith Qtr 1CV15/0e
TW4-16
1s(Olrl1&05
2ncj "otr 5/25/05
Sfci Qtr 131/05
4th"Olr 12/7/D5
1st Oil 19/06
2nd Otr 6/14/06
3rd""6ir 7/2106
4lii Qlr 11/8/06
1st Otf 2/28/07
Ztid Qtr 6'27/07
3rd" oir 115/07
4tti Otr 10/10/07
Ist Qtf 3/28^38
2ri"ci""(3tr6/Z5/08"
3(dOtr9/l(yoa
4m Qtt 1115/08
rW4-1i
1st Qtr 116/05
2nd Qtr 5/25/65
3rd"otrB.'3i/05 "
ilh Qtn 2/7/05
1st Qtf 3«/06
2nd Olr 6/14/06
3rd Oil 7/2*06
iiiiotr 1 i/ibe '
1st Qtr 2/28/07
2nd Oil 6/27/07
3fd" Qtr 8/15/07"
imOtr 1(Via07
1st Qtr 128/08
Znd Qtr 6/2"5/08
SrdQtr9/icV08
ithOtr 1CV15/D6
Carbon Tetrachloride
(Spgt)
NA
NA
<1.6
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
cl.O
ClO
cl.O
cio
cl.O
NS "
NS
NS
NS
NS
NS
NS
cl.O
ci.o
ci.6
cio
cl.o"
cl.O
cl.O
<10
ClO
NA
NA
cio
cl 0
cl 0
cio
ci.b
cl.o
cio
cio
cl "6
cl 0
cl.o
cl.o""'
cl 0
ci.o
NA
NA
ci.o
cl.O
cl 0
cl.O
cl.O
cTo
cl.O
cl.O
cio
<10 "
cio
cl.o"'
cl.o
ClO
Parameter
GWQS
Chloride
No GWQS
NA
NA
NA
69
67
"86
65
33
59
59
58
58
54
58
50
" "58
NS"
i^s
NS
NS ""
NS
NS
NS
37
38
38
36
38
57
35
34
" "40
NA
NA
NA
"64
60
55
60
. . 62
79
75
65
69
52
" "58
71
89
NA
NA
NA
41
'36
35
35
34
30
28
32
27
23
23
26
" 30
Chlorotorm
(TOpgn.)
cl.O
cl 6
cl 0
cl.o
cl.O
cl.o
ci 6
cl.o"'""
cid"
ci 0
cl 0
cl.o
ci.o"
cl.b
cl.o"
cl.o
NS
NS
NS
NS
NS
NS
NS
NS
ci.6"
cio
clO
<"i.6
cl.o
cl.o""""
ci."6"
cl d"""
S'lO.: -^c
. :.• -. 212
^: --^: 85
14
39
is
5.2
i3"6
8."7
2."6
7.1
1.4
11
ci.6
ID""
3.9
"38
29.8
39
14
" 12
12
lb.8
i"2'.5
92
8
8:9
7.4
64
" 57
8
9.4
Chloromethane
OOpgT.)
NA
NA'
31
cl.O
1.7
1.4
<L6 ""
cl.O
cl.o
cl.b
cl.o "
cl.o
ci.b
cl.o
cl.o""'
cl.o
NS
NS
NS
NS .
NS
NS "
NS
ClO"
cio
-:1 O" "
cio
ci.o
cl.o
<i"d
cio
cl 0
N"A
NA
32
26
1.1
24
cl.O
ci.o ""
cl.O
•cl.O
cl.O
cl.O
cl.O
<i 0
cl.O
•<;1.0
NA
NA
2 8
t 1
1.6
2.7
ci.o"
cl 0 "
cl 0
ci.o
•^i.o""
cLO
cl 0
cl 0
ci!o
cio
Methylene Chloride
(SiigO.)
NA
NA
cl.O
cl.O
cio
ClO
•;i"".'o
cl.o
cl.o
ci.o
cio
ClO
cl.O
ClO
cio
cl 0
NS "
NS
NS
NS
NS
NS
NS
<"l".0
cl.O
cl.O
ci.o
cio
cl.o" ""
cl.b
cl.o"
cl.o
NA"
NA
-\- ;r.^'"">-"-.'i.^i43
••";- •" • ~~ ^- 5.9
-:. -: ' --;" '.' 21
'-- „- - . 8.9
2.7
-• - -.- •: jr.. 9 2
/; '-" "X\:-;-"G6
1 8
•"••:"-' "--^y.-ir--- •"•-'•"5.1
"' i
;~r.-.>_.",: "•^^'""26
<i'6 ' ~"' •
i3,v ---•'" "'"-• !•*
"•= •.";- ;:"-~""6 6
NA
NA " " "
<10
ci.o
cl.O
cl.O
ci 0
cio
cl.O
cl.o
<1.6 "
cl.O
cl.O
cl.O
cl.O
ci.b
1 Nitrate. Nitrate + NMrlte [
(10 m^}
NS
NS
NS
NS
NS
NS
NS" "
co"."i"
cO.l
co.i
"" '-•-• ~ '.y~'
'"!"•• y 'j^y "-•" ^
-..- "^""^."l- """ •:'•
4 ..._ _:T~. •!!
- "-- 'i: •'- '.-
-
4.2
4.3
4.6
43
4.2
49
4 3
06
..|o
"1 4.4
41
3B
42
" "43
ie
2.4
2.3
1.4
1.1
0.8
o!4
1.6
1.38
6.76
"1.4
3
1.9
2.7
5.6
"••i2'3
99
54
4.4
cO.1
1.5
,-10 E
9.82
.,.,
-12.9
"'•13.3
73
"59
47
"6 1
5.7
"" sii
49
"5
4.4
6.7
"4.6
4.86
5 15
NA = noi analyzed
NS = nol sampled
Shaded mdicates concentrations exceeding GWOS
Bold and italics indicates lhe MDL exceeded the GWOS
1st Qlr = January - March
2nd Qtr •= April - June
3rd Qtr = July - September
4ih Qtr = Oclober - December
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 4th QUARTER 2008
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
NA = not analyzed
NS = not sampled
Shaded indicates concentrations enceeding GWOS
Bold and italics indicates the MDL exceeded tlie GWQS.
1 st Ott - January - Match
2nd Qtr = Apnl - June
3rd Olr - July - Sepiember
4tti Qtr = October - December
Wall
Sampling Event
TW4-19
IstOtrll&OS
2nd Otr 5/25/05
3tdbiraGl/65""
ith Qtr ia7/05
ist" Qtr 19/06
Znd Qtr 6/14/06"
Srd Qtf 7/2*06
ithQtrll/BTB"
1stQtr2/2"B/67""
ZniJ Qtf 6/27/07
3rdOlrl1&V7
ith Olr 1*1*07
lst"Qtrl2a08
Znd Qtr a/25Wl
3rd Qtr"* 1*08
4th"6tf 1*115/08"
TW4-20
1SlQtrll&05
Znd Otr 5/25/05
SrdOif 8/31/05
41h Qtr 12/7/05
1st Otr 1106
Zndbtr&14A36
s"rd"Qir"7/2*06
4th"6i"r "ii/ioe""
1st" Otr 2/28/07 "
2nd Qtr 6/27/07
3rd Otr 115/07
iih Otr 10/1107
isl Qtf 3/2108
Znd Olr 6'25/Oa
3rd Qtf 9/1108
rW4-21
ist Olr 116/05
Znd Otr 5/25/05
Srd Qtr 8/31/05
4tii"Qtr i2/7/6"5" "
1st Qtt 19/06
anci Qtf 6/14/06
Srd Qtr 7.2*06
4th Olr 11/108
1stOir"2^"a/67
Znd Qtr 6/27/07
Srd Qlr 115/07
ilh Otr 1*1*07
IStQlrS'^a/Oe
2tid Qtr &2l68"
3rd" Otf 9.-1*06
IthOtr 1*15/08
ilh Otr 11/18/08
rW4-22
isl Qtr 11105
2nd Olr 12105
Snd Otr a/31/05
ithOtr 12/7/tH""
ISI Qlr 1*06
ZndQtr6/l4'06
Srd Otr 7/20rt36
ith Otr 11/8/06
Isi'oir"2/2107 "
Znd Qlr 6,27.07
Srd Qtr a/1107
ithOtr 1*l*D7
1st Olr 12106
Znd Otr 6.'25/b8
3rd"Oir9/10,-0a
ittiQtt iiis/oa
4th Qtr 11/1106
Parameter
GWQS
Carbon Tetrachloride
(5 Mgfl.)
NA
NA
c5iO
•:50
<S0
<S0
<S0
cio
B:G]J,fr^yyy
NA
<10
<2S6
<5ad
<50b
<1000 •r J— ^.••.-^"-^«(-
^._._^^ jv^S^
••:-:- -::-••= -
'^'~ -••-.•'*!" '
uAU-^wm
NA"
c5.0
cl 6
c2.5
c2.5
c2.5
~ /.^'.~
cio
clO
•-T'...^
NA
NA
c5 6
c5 0
cID
c)0
c"j£I
cl 0
cl 0
cl.O
cl.O
cl.O
cl.O
cl 0
1 3
NA
c2 0
1.6
" 1.3
Chloride
No GWQS
NA
NA"
NA
81
86
116
i2'3"
134
133
Chlorororm
C70iig/L)
•- ."^2.200
;" y 1,200
'. „'"i;4o6
••"^:~=.= 2.800
"'-..-^ 1,200
"1,100
- 1.120
•;-•- " ""1.050
"""=:" .1.200
Chlorvmethafte
130 vgn.)
NA
NA
c5 0
<50
<50
<S0
<sb
2.6
<1 0
IMethylene Chloride
(Sp*™.)
NA
NA
<5.0
<S0
<so " ""
<so
<50
clO "
cio '
Did not sample
1.9
19
29
{•j^^
-7:-^ -^
129
132
131
128
113
124
• -" -1.100
..•^~. 1,100
"•"".";•'. ^1,600
'.- -- -1.000
j">"r-"-' 3.600
•-: ••_ 4.200
cl.O
cl.O
<1.0
cl.O
cio
cl.O
cl.O
cl 0
cl.o
cl 0
cl.O
cl.O
Monitor nelt was not installed
^^^i;-
3.1
22
35
1-6.8
".^9
£yA3
yy^s
NA
NA
131
120
235
" 134
124
124
112
117
i76
132
" 191
156
-..^^ 39.000
=-T-' 3,8W
•; - I9.0O0
:. ,--?"9.200
•'•-..V 61.000
I v^^^ 5.300
:"-"- 11.666
'•y, ,z. 4.400
."•-¥ 1.800
.. .^ 5.200
" " •.^'^•- 9.000
">";v~;13.000
""•""•-^3O.0O6
y .-21.606
NA
cio
<250
<500
<5O0
ciijiw
"1.9
ci 0
cl.o
cl 0
cl.o
ClO
cl 0"
cl.o
HWI'iiWHITt
NA
<10
<25b
<so6
<soo
<i«w
2.2
1.1
cl.O
1.8
1.9
15
12
"3"."7
Monitor well was not installed
2
'""i.8
-"5.8
i^;"7
"'~l'.7
16
2
NA
NA
353
347
318
357
296
306
327
300
288
331
271
244
264
NA
•-: .'.- 192
•y'." --^'iA
. kR • "86
-120
.i20
r - 108
-^.. --139
•-.; "--160
V-;-'" sob
•4:" : 140
"'V- • -•.120
-"- - • 390
180
-^ - . .jgg
NA
170" 7_^.
NA
c5.0
cl.O
c2 5
c2 5
c2 5
cl.O
ci.6
cl.o
cl 0
cib
cl.o
cio
cio
NA
c2 0
NA
c5 6
cl.O
c2 5"
c2 5
c2.5"
cio
cl.O
ci.6
cl.O
cl.O
cl.O
cio
cl.O
NA
c2.0
Mcnnof well was not installed
NA
NA
253
236
221
221
236
347
"" "273
259
238
519
271
524
539
NA
-=-340
-:•. "290
!•'-".•" .326
.1390
•"•"" i^280
.864
-" L,:V-350
.--' 440
740
.~ " "536
. y.. 440
y '••i4oo
• •••^206
- • - " 6300
NA
Q3Q'-'zyy"
NA
<5.0
<5!6"
cio
cio
cio
16
cl.O
cio
clO
ClO
cl.O
cl.O
cl.O
NA
c2 0
NA
c5 0
<56
clD
<10
<:10
cl 0 ""
ClO
cl 0
clo"
cl.O
cl.O
cl.O
cl.6 "
NA
c2.0
•
Nitrate, NHrate •!-Nllrlte
(10 mg'L)
53
57
4.6
cO.1
4
5.2
4.3
4.6
4
4.1
• 4
2.2
2.8
V;.- !-.r^.-..=.""\A-:'35.2
•--^S'y-t-'--- y_-.':,^.'Ai.e
'-=^y.y-y yvi.\ " 2^9
i.s
38
9.4
3^5
4.2
2.3
2.1
sie
0.9
6
4.44
""•"-," " ^ -" "^"14.6
- J -rt: '^., ".-••liai
9.6
" " "B5
• ": """ '•••:-"- ^—••'""10".2
89
8.7
8.7
"""8 6
86
8.3
V-"^"-^;,-; •'^.^i"4".3
B!8
7.57
8
NA
>: :^ - 1: 18.2
-• '-•:. '• z- y^ 1S.7
"•'"-''"'".'. "^^=^'1^)
y "--^". • •"" •'-• 153
= •-^j-_.^ .:- ., "14.3
.-'•--»„ •i'--' .l'4.5
- "H:."" " -- -' '"y. '"15.9
"'^r •; -••.,,• 2oT9
=" :•'-' ~ - :-.„'"ies
- '-^•- '^''^^-19 3
•>• ~.:''"y '•~^Q.Q
•-- .4-" •^"-' 1"""39 1
-.- .^^-. . ••;•:••• '. 41.9
" y =^ -#) "38.7
-' -;. ." . • " l_Z^.'__'dS3
NA
TABLE 1
HtSTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 4th QUARTER 2008
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
IW4-23
Znd Otr 6/27/07
Srd Qtr 115/07
«hQ[r laiao"?
1st Otr 3/2108
2ndOirl2&'08
3rd "Qtr 9/1108
ithOtr 1*15«)8
4th Otr 11/18/08
TW4-24
2nd Qtt 6/27/07
Srd Qtr 115/07
4tii Otr 111*07
1st Qtr 12108
SndOtrS-fS'Oa
3rd Qtr 11*08
ilh Qtr 1*15/08
ithQlrii/1108
rW4-25
and Qtr 127.07
3rd Olr 11107
ith Oil 1*1*07
131 Qtr 12108
2nd Qlr 6/2108
Snd Qtr 9/1*08
4(h Off 1*15/06
4th Oir 11/18.08
Parameter
GWQS
Cart>on Tetrachloride
cl.O
cl.O
cJO"
clO
cio
cio
NA
c2.0
--I0 "
cio
cl.O
cl 0
c).0
cl.O
NA
c2.0
clO
cl.O
ClO
cl.O
cl 0
cl.O
NA
c2.0
Chic* kto
No GWQS
47
46
45
41
"4i
35
51
NA
770
" 791
692
740
834
1180
1130
NA
395
382
358
374
344
333
366
" NA
Chloroform
(70 pg/L)
cl 0
cl 0
clO
cl 0
cl.O
cl.O
NA "
c2 0
2.6
2.2
1.5
1 5
14
29
NA
c2 0
cl.O
22
cl 0
cl.O
cl.O
cl.O
NA
c2.0
Chloromethane
(30 \i^)
clO
clO
cJ.O
cl.O
cl.O
cio "
NA
c2.0
cl.O
cl.O
cl.O
cl 0
clO
cl 6
NA
c2.0
clO
cl 0
cl 0
cl.O
cl 6
cl 0
NA
c2 0
MettivlHia Chloride
(Spgfl.)
ci6"
cl.o
^1 0 "
cio
cl.o
ClO
NA
c2 0
cl.O
ci.6 "
cl.O
Tl.O
cl.b"
cl.b
NA
c2.0
cl.O
cl.O
cl.O
cl.O
cio
<1 0
NA
c2.0
Nitrate, Nllrale + Nitrite
(10 mg/L)
cO.1
cOI
c0.1
cO.l
<0.1
•^0.05
<"605
NA
yy.., •' ^-=?€r26.-|
"^.'V^ -. i ^^^'' '2*^''
..~cf.-.----l-.'f-': 24!i
•' -^••••••••^..~^- •-• 45.3
y •" --~::":l,-- --: - 38.4
:':"y3yyy'--'--yMs
NA
"•^i -"• - ^r:-~S^17.1
- " - •"^^^-^^ • -"*^ 221
y yw_ -. v-^21.3^
NA ' 1
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 41h OUARTER 200S
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
NA = not analyzes
NS = nm samplea
Shaded indicates concentrations exceedir>g GWOS.
Bold and Mahcs indicates the MDL exceeded the GWOS
Ist Olr - January - March
2nd Qtr ^ April - June
Srd Qtr = July - Sdpiember
4th Otr ^ Oaober - December
Well
Sampling Event
Parameter
GWOS
Carbon Tetrachloride
(5 ugrt.)
TYV4-60 (Dl Blank)
ist Ott 11105
Znd Qtr 5/25TO
3rd Qtr 131/05
ith Qtr 12/7/05
1stQti3«/06
2nd Qtt a/14/06
4lh Qtr 11/106
isi Olr 2/28/07
?ndQrr6«7/U7
3(d Qtr 115/07
4tli Olr 1*1107
1st Qtr 12108
2nd Qlr 125/08
Srd Otr 9/BJ08
4th Qtr 1114/08
NA
NA
cl.O
cl.O
'1.0
cIO
c:1 0
cl.O
.^10
.^1.0
•.1.0
*1.0
^1.0
<1.0
'.^ 0
TW4-e3 (Eq. Blank)
1slQtr3/1&05
Znd Ott 5/25W
Srd Olr 8/31/05
4th Qlr 12/7/05
1st Qtr 19/06
3rd Otr 7/2*06
isl Qtr 2/28/07
Znd Qtr 6/27/07
3rd Qtt a/15/07
4th Qtr 1*1107
1stQtr3i2108
Znd Qtr 125^38
Srd Otr 9/8/08
4lh Qtr 1*14/06
NA
NA
x25
•elOO
rSO
•^50
^1.0
-,10
•:10
ri.o
r:1.0
--1.0
rlO
^10
TW4-6S (dup ol TW4-20)
ilh Qtt I I/a'06
1st Qtr 2/28/07
Znd Otr 127/07
Srd Oir 115/07
4th Olr 111*07
1st Otr 12108
, -:• -:-=. •-• "• 9.7
•^.z. -. ^ •-•--- ^ '8 3
1 9
±-.~- -r -"., ^. -19
32
-". -• ^-'.-^ -8.2
TW4-65 (dup of TW4-5)
itii Otr 11/106 Icl.O
TW4-65 (dup Ol MW-32 lormer TW4-17)
2nd Otr 6-25,'08 tio
TW4-85 (dup ol •rw4-3)
SnaQtr9/l*08 Ui.o
rW4-70 (dup of TW4-B)
2ndbir&2'lD8 U\ Q
TW4-70 (dup Of MW-26 fonner TW4-15)
1stQlr2/2f07
2nd Oir 627/07
3rdQtrl15/07
ithOtr 1*1*07
cl.O
cl 0
cl 0
cl 0
TW4-70 (dup ot MW-32 former TW4-17)
1st Qlr 12106
Srd Olt 11*08
TW4-73
3rd Otr 9/909
cl.O
cl.O
Chloride
No GWQS
NA
NA
NA
cl.O
cl.O
cib
<10
cio
<f 0
cio
cl.O
cl.O
cl.o
<10
cl.O
NA
NA
NA
51
52
46
cl.O
cl.O
clO
cl.O
cl 0
cl.O
cl.O
cl.O
125
139
125
137
176
137
56
29
18
45
55
53
51
58
31
31
Chloroform
(70 ugrt.)
ClO
37.6
2.7
cl.O
cl.O
cl.O •
cl.O
25
.. -T-' 190
ClO
5.7
1.1
13
3
18
-- r: 41400
ztT ; 3.500
.- ?tV 3.100
- .*r 3.260
~- •.!V3,300
I •'^;-:2.800
20
50
cl.O
1
1.5
cl.O
S
16
il. :-t3.700
'^•-' "16,006
-. -."1.700
^•. .-r27.006
r., '*-' 3.600
-- -M 2.000
53
cl 0
cl.o
ClO
41
:-' . "•'' ,400
• , •-, -„~440
-.L.-. 1.700
cl.O
cl.O
Cant find reason tor TW4-73 in lexted
clO id In
Chloromethane
(30|igfl-)
NA
NA
2.4
cl.O
1.5
1.1
1.3
cl.O
cIO
cl.O
cl.O
cl.O
cl.O
cl.O
•^1.0
NA
NA
c25
<T(W
c50
<S0
cl.O
cl.O
<1.0
cl 0
cl 0
14
cl.O
•<^1.0
18
cl 0
cl.O
clO
cl 0
cl.O
cl.o
cl 0
cl.O-
c1 0
cl 0
cl.O
cl.O
cl.O
cl.O
cl.O
ClO
Methylene Chloride
(5 Mgfl.)
NA
NA
cio
ClO
<10
cl.O
cl.O
cl.O
cFO
cl.O
ClO
cl.O
cio
cl 0
cl.O
NA
NA
c25
ctOD
<50
<S0
cl.o
<10
cl.O
cl.O
cl.O
cl 0
cl.O
clO
2.2
1
cl 0
cl 0
22
1.2
cl.O
cl 0
<10
cl.O
cl.O
18
clO
cl.O
cl 0
cl.O
cl.O
Nllrale, Nitrate -t-
(10 mgn.)
<0.1
cOI
cOI
cO.1
cO.1
cO.1
C.I
cOl
<"o'. f
cO.1
c6i
cOI
c0.05
c0.05
cO.05
-_ -^- •- j~- •
cO.1
cO.1
cO.1
cO.1
c0.05
c0.05
c0 05
<0.05
2.72
cl.O
cO 1
c0 05
c0.05
1
Nllrlte
[
8.2
•- 10.2
66
6.E
62
5.4
0.1
I.f
4.;
1.9
4
5.3
4f
67
mm
8.1
06
0;
0.6
1
CM
O
w o
Q. E (Q
CO
o
o 5 o o
E E
3
«
00
o o
CM k.
V
t n
3
a £
+-
n
CO o o
CJ
l_
t: (0
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Table 3
4th Quarter 2008 Sampling Order
The correct 4th Quarter 2008 sampling Order (lowest concentration to
highest concentration) Based the Chloroform Concentrations in the 3rd
Qtr 2008 Sampiinq Event
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Well
TW4-3
TW4-8
TW4-12
TW4-13
TW4-14
TW4-23
TW4-25
MW-32 (TW4-17)
TW4-9
TW4-24
TW4-18
TW4-16
TW4-5
TW4-6
TW4-21
*MW-26(TW4-15)
TW4-10
TW4-11
TW4-7
TW4-1
"MW-4
TW4-4
TW4-2
*TW4-19
TW4-22
*TW4-20
Chloroform (pq/L)
<1.0
<1.0
<1-0
<1.0
<1.0
<1.0
<1-0
<1.0
<1.0
2.9
8
10
11
39
120
630
660
900
1,600
1,700
1,800
2,200
2,800
3,600
6,300
21,000
DUSA order based on purging times for the 4th Qurater 2008
Sampling Event
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Well
MW-32 (TW4-17)
'MW-26(TW4-15)
'TW4-20
TW4-25
'MW-4
TW4-3
TW4-12
TW4-14
TW4-13
'TW4-19
TV/4-23
TW4-9
TW4-8
TW4-24
TW4-1B
TW4-16
TW4-5
TW4-6
TW4-21
TW4-10
TW4-11
TW4-7
TW4-1
TW4-4
TW4-2
TW4-22
Chloroform (MQ/L)
<1.0
1,700
NA
<2.0
2.100
<1.0
<1-0
<1.0
<1.0
4.200
<1.0
<1.0
<1.0
<2.0
9.4
3-9
10
37
170
t.200
1.000
2.500
1,700
2.500
3.200
630
Time
840
854
900
905
930
933
1000
1014
1018
1012
1057
1209
1229
1249
1320
1344
1407
1423
1445
1505
1522
1537
1552
1607
1624
1643
* Pumping wells may be samled at anytime
NA = Not analyzed
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Utah Radiation Control Inspection Form
Chloroform Contamination Investigation
1st Quarter 2009 Ground Water Monitoring Report
Denison Mines (USA) Corp.
White Mesa Uranium Mill, near Blanding, Utah
Regulatory Enforcement Documenls:
• While Mesa Uranium Mill Ground Waler Quality Assurance Plan (hereafter "QAP").
QAP enforce on June 20, 2008.
• Groundwater Discharge Permii No. UGW370004 (hereafter "Permit"). Permit
enforce on March 17, 2008.
Date of Inspection/Report Review: June 23, 2009
DRC Inspection Staff: Dean Henderson
Were Violations Recommended: Yes
GROUNDWATER MONITORING REPORT
1. Was the 1st quarter 2009 Groundwater Monitoring Report (hereafter "Report") submitted
to the DRC by June 1, 2009 as required Pan T.F.l ofthe Permit and section 11 oflhe
QAP?
Yes. The Report was submitted and received by DRC on June 1, 2009.
Violation; No
2. Was the decontamination procedure for all sampling equipment foliow 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 ("Dl") water. "
The pump used to purge the wells was only rinsed with de-ionized waler prior to purging
activities.
Violation: Yes. Part I.E. 1(a) of the Pcrmil and section 6.2.5 of the QAP
3. Were groundwater levels measured at the locations required in the section 6.1 ofthe
QAP? Yes
Violation: No.
Well
MW-I
MW-2
MW-3
MW-4
MW-5
MW-11
MW-12
MW-13
MW-14
MW-15
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-I2
TW4-13
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Ycs
Yes
No
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
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
4. Were there Field Data Work Sheets foreach Monitoring Well have the information listed
Part I.F.l(a) and in section 7.1 of the QAP? No
No Field Data Work Sheel forTW4-14.
Violation: Yes
5. Where purging procedures followed as required in section 6.2.7(v) of the QAP (see table
4)? No. Violation: Yes.
No purging recorded forTW4-14. There where one set of field parameters recorded in
the following wells: TW4-L TW4-2, TW4-3, TW4-4, TW4-5, TW4-6, TW4-7, TW4-8,
TW4-9, TW4-10, TW4-11, TW4-12, TW4-13, TW4-16- TW4-18. TW4-21, TW4-22,
TW4-23, TW4-24, and TW4-25. Parameters were measured prior lo purging the required
two casing volumes (see Table 4).
6. Were water quality QC samples collected as required in section 4.3 of the QAP (see lable
betow and Table 2)? Yes. Violation: No
Sample
Duplicate for each batch
of 20 sampies.
Trip Blank for each
cooler shipped with VOC
samples.
Equipment Blank for
sampling equipmeni in
contact with the
groundwaier (Pumps,
bailers elc).
Yes/ No
yes
yes
yes
Violation
no
no
no
Comments
TW4-65 a duplicate of MW-32
TW4-70 a duplicate of TW4-2
One equipmeni blank identified as
TW4-63
Note: Although all QC samples were collected as required in section 4.3 of the QAP,
a sample results for a sample with lhe identification of TW4-62 and TW4-73 in
Energy Laboratories analytical summary report was not identified, mentioned or
explained in the text ofthe CMR. This is an apparent QC sample and will be
addressed in Item 16 below.
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-il
TW4-12
TW4-13
TW4-14
TW4-I6
TW4-I8
TW4-I9
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
•"^Nitrate
10 mg/L
yes
yes
yes
yes
yes
yes
yes
ves
yes
yes
ves
ves
ves
ves
yes
yes
yes
yes
yes
yes
yes
ves
ves
ves
yes
ves
Chloroform
70 Mg/L
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
Parameters w
Carbon
tetrachloride
5 11^
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
th their GWQS
Chloromethane
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
ves
yes
ves
yes
yes
yes
yes
yes
ves
ves
yes
ves
yes
Methylene
chloride
.5 MgA.
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
ves
yes
yes
yes
yes
yes
yes
ves
yes
yes
ves
yes
yes
Chloride
No
GWQS
yes
yes
yes
yes
yes
yes
yes
yes
yes
ves
yes
ves
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
I. Nitrale + Nitrile as N
8. Were all groundwater quality analyses performed with a minimum deteciion limit or
reporting limit less then its respective GWQS (See Table 1)?: Yes
Violation: No
9. Did samples arrive at the contracted laboratory below 4'^C as required in section 6.2.12(e)
oflhe QAP? Yes. According to the chain of custody documeni provided in Energy
Laboratories analytical summary report that is provided in Attachment H the Report,
samples arrived at a 3°C. Violation: No
10. Were the compliance monitoring parameters analyzed by excepted EPA analytical
methods as required in Table 1 in section 8.2 of the 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-I!
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
TW4-65
TW4-70
TW4-73
*Trip Blank
Parameters with their Analytical Methods
'"Nitrate
E3532
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
Chloroform
SW8260B
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
Carbon
tetrachloride
SW8260B
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
Chloromethane
SW8260B
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Ycs
Yes
Yes
Yes
Yes
Yes
Ycs
Yes
Yes
Yes
Yes
Yes
Yes
Methylene
chloride
SW826QB
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
Chloride
A4500-
CL
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 wiihin maximum holding times as required
in Table 1 in section 8.2 ofthe QAP? Yes. Violation: No
Sample ID
MW-4
MW-26
MW-32
TW4-1
TW4-2
TW4-3
TW4-4
TW4-5
TW4-6
T^\^4-7
TW4-8
TW4-9
TW4-10
TW4-I1
TW4-I2
TW4-13
TW4-I4
TW4-I6
TW4-I8
TW4-I9
TW4-20
TW4-21
TW4-22
TW4-23
TW4-24
TW4-25
TW4-60
TW4-63
TW4-65
TW4-70
"^Trip Blank
Parameters wilh their holding times
"•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
Yes
Chlorotorm
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
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
Yes
Yes
Chloromethane
14 days
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Ycs
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
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
Yes
12. Did any of the compliance monitoring parameters exceed groundwater qualily standards
(GWQS) [See Table 11? Yes.
Nitrate, Nitrate-H Nitrite: TW4-4, TW4-10, TW4-19, TW4-22, TW4-24, and TW4-25
Carbon Tetrachloride: TW4-20
Chlorofonn: MW-4. MW-26, TW4-L TW4-2, TW4-4, TW4-7- TW4-I0- TW4-11.
TW4-19, TW4-20, TW4-21, and TW4-22.
Methylene 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 oflhe
QAP? Yes. See Details below.
Violation: No
Precision (see Table 2): Duplicate sample for MW-32 (TW4-65) and TW4-2 (TW4-
70) were within the 20% relative percent difference. Therefore the data set passes
the precision guidelines.
Representativeness (see Table 2): Duplicate sample for TW4-3 (TW4-65) and MW-
32 (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.
Accuracy: 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, measuremenl,
procedures, methods, and reporting units. After review of the data and report it
appears that the comparability requiremenis 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 Slate of Utah Certified Heath Laboratory as required in
section 2.5 of the QAP? Yes. Laboralory: 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: Yes
The following are missing reporting requirements:
I) Part of section 6.b of Appendix A requires: ^'Identifi' all quality assurance samples,
e.g. ttip blanks equipment blanks, duplicate sampies."
Sample results for samples identification as TW4-62 and TW4-73 in Energy
Laboratories analytical summary report was not identified, mentioned or explained in
the text of the Report.
2) Part of section 6.c of Appendix A requires: "Analytical resuhs for each well
summarized in a data table, that includes historic analytical results for each well."
Historic analytical results for all wells for carbon tetrachloride, chloride,
chloromethane, and Methylene chloride is missing.
3) Part of section 6(c) of Appendix A requires: "...3) depth to groundwater measured
and groundwater elevation from each monitor well summarized in a data table, that
includes historic grotmdwater level data for each well,...''
The CMR did nol include a table with historic groundwater level data for wells TW4-
23,TW4-24,andTW4-25.
4) Part of section 6(c) of Appendix A requires: "a current chlorofonn isoconcentration
map with one ofthe isoconcentration lines showing the 70 pg/L boundary,"
The Report included a curtent chloroform isoconceniration map but it did not show a
the isoconcentration lines showing the 70 fJg/L boundary.
5) Part of section 6.c of Appendix A requires: "Calculate chloroform ifiass removal by
pumping wells. Calculations would include: l)total historic chloroform mass
removed, 2) total historic chloroform mass removed for each pumping well, 3) total
chlorofonn mass removed for the quarter and, 4) total chlorofonn mass removed
form each pumping well for the quarter."
No calculated chloroform mass removal by the pumping wells reported in the Report.
/N
References
Denison Mines (USA) Coip., June 2008, White Mesa Uranium Mill, Ground Water .
Monitoring Quality Assurance Plan.
Denison Mines (USA) Corp., November 2008, While Mesa Uranium Mill Chloroform
Monitoring Report T' Quarter (January through March 2009)
State of Utah Division of Water Qualily 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.
TABLE 1
HISTORIC SUMMARY OF MONfTOBING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
MW-4
1star3'l6'l>5
2nd Otr "s^iCe
3rdOlr&31/05
4th Qtf 12/7A)5
lat Qlr 3*9/06
2ndOti"6/i4/06
3rd Qtf 7/2CV06
4thQtr"ll".'8/06
lstQtr"2/2a/07
2nd Qtr 6/^7/07
3rdOtra/l5flD7
«ti Qtt 10/10/07
istarazfros
End Qtr &^5.0e
3rdOtr9/lCyoe
4th Qtr" 10/15/08
1st Otr 3*4/09
MW-4A(7W4-A)
1siQtr^l6/05
Znd Olr aSS/OS
3rd Qtr" 8/31/05
41hQt"r" 12/7/05
IstQtrS/a'OB
End Qtr 6/14/06
3rd Qtr 7/2W05
41h Qlr 1 l/fttB
lstQtr2/2a/07
Carbon Tetracnioride
(5 MO^L)
NA
NA
<W "
<50
<S0
<50
<50 "' __
NA
NA
<:I0
<50
<5d"
<50
<S0
«W-a6 (lormer •rW4-151
1stQtr^lEy05
End Olr arj^OS
3rd Qtr 8/31/05
*1h Otr 12/7/05
1stQtr3'9.'06
2nd Qtr 6/1*06
3rd Qtr 7/2(V06
4lh Otr 11/6/06 "
i"a"t'Otr "2*28/07
2nd Olr &i:7.'07
3rd Olr £yiS'O/
4tti Qtr 10/10/07
lstQtr3/2B/08
2nd oif 6^5/08
3rd6lr9/lO«8
4ihOir l"&l5/08
4lhOir n/ia/09
1st Qtf 3/4.'09
NA
NA
-:5 0
'<56"
<so <sd <50'
<1.0
^1.0 '
<\'Q" "
^•1.0""""
<i.6"""
<i o"
<1 0
<10 ""
NA " "
•^zo "
<^.6"'
MW-32(fo'n«rTW4-17)
1st Olr 3/16/05
2nd Otr 5/25/05
3rdO(r6/3^'05
4"thQtf'i2/7/05
1stOtr'3/9/06
2nd" Qtr a/14/06
arrj Otr 7!^^
4t!iOtr 11/fl'06
1Statr2/2a/07
2nd Olr 6/27/07
3ril Qtr "e/15/07
4th Qtr id'10/07
1st Otr 128/08
2nd Qtr 6/25/"d8
3rdOtr9/lCVOa
4lhOtr"td/15rt>8
lsiQtr3/4,'09
NA
NA
<1.0
<1.0
-:1.0 "
<1 0
<1.D
•^1.0
<1.0
<^.0
<1.0
<1.0
<1.0
<1.0
<1.0
:;i."o
<i.6"
21
1 6
1.8
19
17
1.7
1.8
1.8
1.7
" "i.s
2.4
i.9
Parameler
GWOS
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
""""55
53
54
54
54
eo
Chloroform
(70 pg/L)
"" "2.900
3.170
-3.500
3.000
- • 3.100
3.000
. 2.820
. 2.830
2.300
i . 2.000
.---2.600
2.300
2.400
2,500
1.800
y': : 2.100
".?""r"."'2,206
3.700
3.^740
."•"": .3.800
• •"3.000
"""".-"/.""3,706
3.300
3.190
. ..3.370
-• 2,500
Chloromethane
(30 vgn.)
NA
NA
<io
<50
<50
<50
<S0
1.4 ""
<1 0
<1 0
<"i."o
<1 0
<1 D
<^ D
<.! 0
<^0
<1.0
NA
NA
<10 "
<50
<S0
<50
<50
<1.0
<1.0
Methylerw Chloride
(spgrt-)
NA
NA
<10
•<50
<50
<» <»
<10
^10
<1.0
<1 0
^^I.O
<1.0
<1.0
<^o
<1.0
<10
NA
NA
<r70
<50
•^50
<50
<'[0
Well abandonded
55
"""52
"52
65
"54
56
49
57
57
49
57
44
64
43
33
32
30
"32
31
32
32
"31
32
31
29
30
" "26
30
' ~ 316
"'""442
•• '960
"."" " i.'obo
1;10b
z ^ - -. 1- 630
.-"i=f 2.170
••E.-i..-^282
.'.".---570
' 300
". 1.400
,2.000
.1. - -930
^^.^•i: .1.300
. " - 630
NA
- ^-1.700
.... - 950
^10
<1 0
'cio
^1 0
<I.O
f 1 0
<10
<^ 0
<1 0
.;l 0
^1.0
<I.O
<^.o
tl 0
<1.0
•cl.o
<i 0
NA
NA
54
<sd
<50
<50
<S0
<1 0
"<"ib
<1 D '
<^ 0
tl 0
<.10
fio
<1.0
NA
<2.0
<1.0
NA
NA
32
<1.0
<1.0
"3.5
" i.a
"1.5
<1.0
<1.0
<1.0
<1.0
<1.0
<1 0
<i 0
cio
<1 0
NA
NA
<5.0
<50
<50
•c50
<50
-. - '^ • J '-z
' . "~~'rc~' ••'
/^?2—,,.'!
~ - -.-^
L -. ..•.••r.
NA
=.•=.= •\-„.
-%:i™"; '• .•• .
NA
NA
<1.0
<\0
•^10
<10
<1.0
<1.0
•^1.0
<1.0
•elO
<10
<1.0
<^o
<^ 0
<i.b
•^1.0
Nllrale. Nitrate *
(lOmWD
26
" 5.5
-.13
->36
f~.14
z;40
' "53
.124
.100
51
NA
<o"."i""
^0.1
<0."1 "
<0.1
<0."l
tO.l
<i.o"
<: 1
<1.0
<1.0
<1.0
<"i".6
<.i
<"i.o
<1.0
<0 05
<.\
^^^^^
Nitrite
6.3
7 1
7.0
7.C
6 0
6.0
" " T.2
6.4
"""" 6.3
7.0
62
62
58
6 !
" " 6.4
"" " 5.9
57
71
78
6.1
67
"" " 5.8
7.3
" 1.2
7.1
7.1
0.;
02
"0.2
0.3
0.2
0.2
1 4
0.3
08
04
1
0.6
0.1
0.6
0 2
01
04
NA = not analyzed
NS - not sJinpled
Shaded Indicates concentrations eiceeding GWQS.
Bold and Italics indicates the MDL exceeded the GWQ
Isl Otr = January • March
2nd Otr = April - June
3rd Otr = July • Seplembtr
4ih Olr = Cfclober - December
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTTGATION
DUSA WHITE MESA MILL
Well
Sampling Event
rw4-i
1st Otr cV 16/05
2nd Qtr 5^25/05
3rd Qtr 8/31/05
4th Qlr 12/7/05
isl dti ^9/06
2nd Qlf 6/14/06
3rd Qtr 7/20.06
ath Otr 11/B/06
Isl Qtr 2/28/07
2nd Otr 6^7/07
3rdQtf a'15/07
*th Qtr 10/10.07
istQtr3.-2a/0a
2nd Olr a*2S'08
3rdQtr9;iCV08
4th Otr 1(V15/0e
1stQtr3'l1/09
TW4-2
lstOtr^ia-'05
2nd Olr 512505
3rdOlra/31.'05
4th"0(r 12.7/05
1siQti3rt(06
2ndOira/14,'06
3rd""Qlr 7/2^06
4th Qtn 1 •awe
1stOir2/2a''07""
2nd Otr &^7.07
3rdOtra/1S'07
4thQtr 1Q/1Qrt37
l9tOlra'2&a8
2nd Q"tr"6/25/08
3rdOtr9/1&08
4lh Qtr 10*15/06
4lh Qtr 11/16n39
1st Olr a/11/09
TW4-3
lstQtr3'1&05
Snd Qtr 5/25/05
Srd Qtr 6/31.'05
4th Qtr 12/7/05
1st Otr 3'9/Oti
2nd Qtr 6/14/06
3nd Qtf 7/20/06
4th Olr 11/6*06
l3t Otr 2/28/07
2nd Qtr 5/27/07
3ndQtr8/15/"0/
4th Olr ia'10/07
1st Qtr 1^28/06
2nd Qti 6/2i'08
3nj Qtr 9/10/08"
4th Otr ia'15/03
1 si Qtr 3.4/09
TW4-4
Isi Qtr 3*16/05
2nd Otr 5/25rt35
Srd Ql< a/31 •OS
•Itti Otr 12/7/05
Isl Qtr 3*9.06
2nd Qtr 6/14,06
3rd Olr 7/20/06
4th Otr 11/8/06
l3t Otr 2/23/07
2nd Oir 6/27/07
^ttio^t3/^5/0T
4th Otr 10.-10^07
1stQlr3.-2a.0e
End Olr 6'2S'08
3rd Oir 9/1 HOB
IthOtr 10/15-08
41hQtr 11.1&U9
Ist Otr 3/4/09
' Parameter
GWOS
Carbon Tetrachloride
(stiao.}
NA
NA
<10
<so
<50
<50
<50
NA
NA
<"io
<so
<50
<S0
<S0
NA
NA
NA
-•1.0
<1.0
<1.0
<^ 0
<1.0
<1.0
<1 0
•.;1.0
<1.0
<1 0
'^•'•0 . .
<:1 0
<1.0
.-1.0
-.1 0
NA
NA
<1D
<50
<50
<S0
':S0
<20
1 4
1.2
14
1 3
13
13
1 1
1 3
1 3
1 1
23
1.8
2.5
"2.2
2.1
2.3
22
2.4
24
22
1.7
1.5
1.7
1 5
1.^
1.6
1.5
1.4
NA
1.2
Chloride
No GWQS
NA
NA
NA "
52
49
48
51
" 47
47
45
43
43
39
39
35
41
37
NA
NA
NA
56
56
56
54
55
"" "54
50
49
" "51
48
46
42
47
NA
46
NA
NA
NA
26
26
26
26
23
22
23
24
27
"" "21
19
19
22
21
NA
NA
NA
54
51
46
50
49
49
47
45
47
43
42
39
44
NA
37
Chloroform
(70M91-)
2,700
«* """. 3.080
2,900
''yy 2.400
Z^" 2.700
i=l„.""2,200
--=-^-2,840
"•%yi '2.260
i-" ~= 1.900
r>.,±Pl.900
"F-^"S 2.300
- =12.000
-^ - = 2.000
-- 3.1,900
4^1.700
---.=1;700
" - 71.700
I.:. " -3.700
p.""/ 3.750
yi-l "3.900
= "= f- 3.500
E. - -3.900
^y 3.200
l*-r- 4.120
r= -^ 3,420
~ - -=- 2.366
~:-r:§i-, 3.000
' '^-^_-340
.:• 1^3,200
r ."13.300
:V-".-^3,100
; .„-=2.800
NA
•- - :f 3.200
- >3 100
<"i 0
<\ 0
<1.0
<t.O
<10
<10
<:1.0
<1 0
<i.o""
<:1.0
<1.0
.^1.0
<1.0
<1.0
<1.0
<1.0
<1.0
"^3.100
•12.400
- --3.200
" ':'2.aoo
•y. -"2,900
= - 2.600
•=w--: 2,850
r 2,670
% '•: 2,200
=Sy y - 2.400
£ • -2,700
'-m : 2.500
ii }"'2.600
--y&-} 2.500
^Cr 2.200
NA
-' c 2.500
.'^- 2.200
Ct^lorofnethane
130 vg/L)
UPi" "
NA
-.10
-rSO
<50
<so
<so
tl.O
tl 0
tl.O
v-1.0
<1 0
<1.0
<-\ 0
<1 0
tJ.O
cl.o
NA"
NA
tlO
<so
<50
<50
<so
tl.O
tl.O
Tl.O
<1.0
<1 0
<1.0
tl 0
tl.O
NA
t2.0
^1.0
NA"
NA
64
tl 0
23
1 6
2.2
tlO
<^ 0
tl 0
tl.O
•^1.0
•'.^ 0
<1 0
tl 0
tl.O
tl.O
NA
NA
tio
<so
<50
tSO" "
<50
<1 0
tl 0
tl 0
tl 0
.-1.0
<1.0
tl 0
-.1 0
^4A
t2.0
tl.O
Meihylene Chloride
(5M9/LJ
NA
NA
tlO
<50
<S0
••SO
<50
tl.O
tl.O
tl 0
tl.O
•rl.G
tl.O
ti 0
tl.O
tl 0
tl 0
NA
NA
<10
tSO
<5Q
<50
'TSO
tl 1)
•fl.O
-.10
tl 0
<1.0
*"l 0
tl 0
tl.O
NA
t3 0
tl 0
NA
NA
tlO
tl.O
tl 0
tl 0
-'-^-0
vl.O
tl.O
<1 0
-.1.0
tl.O
-•1.0
tl.O
tl 0
tl.O
tl 0
NA
NA
tTO
<50
<50
<S0
<50
tl 0
tl 0
t'.D
--•1 0
tio
•rlO
tl.O
tl.O
tJA
-^2 0
-.1 0
Nitrate, NHrale + Nilrit*
(10 mg/L)
"9.1
" ':- " • AOe
9.8
9.7
9.4
9.6
92
8.9
9
64
7.6
7!6
8.68
8.15
93
75
77
8 6
80
7.6
7.5
7.1
7.4
76
73
78
73
69
6.9
74
7 1
80
NA
6.5
3.5
3.7
3.5
33
3.3
7.1
29
1.5
3.1
3.3
3 1
28
2 8
2.9
2 7
2(5
25
10.0
•:xti"."C" ".- ,11.3
9.9
."" "' y....y.- - 10 2
95
86
97
y ' = :=i =* 101
90
•94
9.6
95
9.2
"zzz' ' '^"^zz 10.8
8.8
,=: - - --.ifiio.l
NA
r yz= •:• 1-10.2
NA- not analyzed
NS - not sampled
Shaded indicates concentrations nicreeding GWOS
Botd and italics mdicaiss tne MDL enneeded the GWQS.
1st Otr -January - Ma'cn
2r)d Qtr - April - Jiin^
Srd Qtr = July - September
4th Olr - Oclober - December
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 1 ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
rrW4-5
lstQtr3/i&05
2nd Olr 5.2&'05
3rdQtf8/3105
ath Qtr 12/7/05
Isl Qtr 3*9/06
Znd Otr a.l"4"06
3rd Qtr 7/2ai36
4th Otr 11/8/06
l3tQtf2/28-0/
2nd Qtr 6,27/07
3rd"Qtr 8/15.07
4th Olr 10'1CV07
lstOtr3'28/0e
2ntt Qlr 6^-25/Oe
SrdOtrWlQ'Oe
4ihQir m-isi'oe
lstar3'4'09
TW4-S
l5tOir3'1605
2nd Otr ^25.'05
3rd Qtr B'S 1/05
41h Qtr :2n/Q5
Istdtr 3/9/06
2ndOtr6'14/06
3rd Olr 7/2006
iaiotr ll/8,'06
l3tQlr2.'2a'07
2nd Olr 6/27/07
3rd Of 8/15/07
4th Otr 1Q'10A17
1st Qfr 3-2a/08
?nd Olr a25'0B
3rdQtt9/ltk)B
4th Or 1&15.08
1st Qtr 311.09
TW4-7
1st Qtr 3'ia05
2nd Qtr 5/25.05
3fd Qtr 8/31/05
4ih Olr 127/05
1st Qtr aabe
2ndair5.H^06
3rd Otr //2Q06
*lh Qtr 11.^8/X)6
1stOlr2/2B/07
2nd Otr 6/27.'07
3rd Qtr &• 15/07
aihdtr l6/H>07
lstQlr3/2a'08
2nd Otr 6/25/08
3rd Olr 9/1008
MttiQtf lO/l&OB
ItnQtr n/iEyog
lstQtri'11,09
TW4-e
i5lOtri16/05
2nd Qlr 5/2^05
3(d Otr 3/31/05
4th Otr 127/05
l3lQtr3.-9/06
andOtrtj;i4;06
3nj Otr 7/20.'OB
4th Oir 1i.^a06
lslQtr2^28^07
?nd Qtr 6/27^07
3(d Otr B.'15/07
Ilh Olr 10/1007
i3tOtr3'28.0a
Jnd Otr 6/25.yfl
3rdQtrP.1&08
iihOtr 10*15/08
latOTra-V09
Carbon Tetrachloride
(Stig/L)
NA
NA
t2 5
•^•2 5 "
t25
t2.5
tl.O
•<;1.0
tl 0
<1 0
•^10
<10
tl 0
tio
tl.O
tl.O
fl 0
NA
NA
tl.O
tl 0
tl.O
tl 0
tl.O
<^1.0
tlO
tl 0
-.1 0
tl 0
f 0
tl.O
tl.O
tl 0
tl.O
NA
NA
tID
<50
<50
<50
<:S0
t2.0
NA
NA
tl 0
tl.O
tl.O
tl 0
tl.O
tl 0
tl 0
t.l D
tl 0
tl 0
•:1 0
flO
tl 0
tl.O
ti.b
1.5
11
1.5
1.4
1.2
1 3
13
14
NA
1 2
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
32
31
30
37
65
32
38
36
35
33
35
35
33
35
52
48
47
51
49
47
45
44
45
43
43
35
40
35
41
39
37
39
40
39
42
42
43
46
45
39
4d
42
Chloroform
{70M9'L)
~^.-r 120
• 113
1- , 82
63
66
5f
53.7
47.1
35
26
92
9.4
11
"""9.3
n
10
12
tl 0
25
10
17
31
19
M
42.8
46
11
18
18
52
24
39
37
61
I £1:3,100
• . >:2,700
--^ l-i 3,100
=-=^#2,500
-"^=^1,900
'=== 2,200
-==.: 2'.^A0
=:L "2.160
= -1,830
r" ^2 600
:"' " -"2,300
-- " 11,900
'- r-"^ 2,200
- ifj,800
-r "=11.600
NA
. ;: = 2.500
:- .-- 1.800
10
tl 0
1.1
tl.D
1 3
1 8
tl.O
tl.O
25
25
1.5
3.5
tl.O
tJO
tl 0
tl 0
tl.O
Chloromethane
{30(igfl.)
NA
NA
5.6
25
3.1
3 1
tl.O
tl.O
tlO
tl 0
tlO
tl.O
tl.O
tl.O
tl.O
tl.O
tlO
NA
NA
2.8
13
tl.O
tl 0
tl.O
tl.O
tl.O
tl.O
tl.O
<1.0
tl.O "
tl.O
tl.O
tl 0
tlO
NA
NA
tio
<50
<50
<S0
<50
tl.O
tl 0
tl 0
tl.O
tl 0
tl 0
tl.O
ti!d
NA
t2.0
tl.O
NA
NA
1.7
tl.O
2.1
1.0
tl.O
tl 0"
tl 0
tl.O
tl.O
t llo
tl 0
tl.O
tl.O
tl.O
tl.O
Methylene Chloride
15P9^)
NA
NA
<2 5
t2 5
t2 5
t25
tl.O
<1 0
tl 0
.^1.0
tl.O
tl.O
tl.O
.-1.0
tl.O
tl 0
-ri.o
NA
NA
tl 0
tl 0
tl 0
tl 0
tio
•^1.0
tl 0
tl.O
tl.O
..-10
tl 0
tl D
tl 0
tl 0
tl.O
NA
NA "
<w
<50
<50
<S0
<S0
t)0
tl.O
.1.0
tt.O
tio
tio
tl 0
tl 0
NA"
t2 0
tio
NA
NA
NA
tlO
tl 0
<1 D
•cl 0
tl 0
tl 0
tl.O
-.-1.0
ti.o"
tl 0
tl.O "
tl.O
.1.0
tl.O
Nitrate. Nitrate -i-
(10 mg/L)
NA
<0.1
'."rb
tl 0
tl.O
t.l
tl.O
tl.O
<0.05
t0 05
-.0.1
• • =
Nitrite
4.9
3.7
6.C
6.0
Q.O
5.9
6.7
29
78
7.0
7.7
82
74
B.7
7.9
93
79
D:
0.4
O.B
09
1.2
1.0
0.6
1.4
1.8
0.6
0.7
08
1.1
0.9
1.1
10
22
52
54
52
5.3
1
45
47
46
6
5 1
4.7
47
42
" 4.8
416
4.01
37
0.
0.3
"01
07
02
05
0 1
NA= nor analy?ea
NS = riot sampled
Shaded indirales cnncflrrtralions eKceeding GWOS.
Bold and haiics indicLiies the MDL exceeded the GWOS
1ST Oir -January-March
2nd Oti - Apnl-June
3rd Otr ^ July - September
4th Qtr - Oclober • DecemDer
TABLE 1
HISTORIC SUMMARY OF MOWfTORING PARAMETERS UP TO THE JST OUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
TW4-9
Jsf Otr S'l605
2nd Otr 5/25/05
3rd Otr a/31/05
4th Qtr 127.05
l3I Qlr 3*9/06
2nd Otr t'l4.06
3rd Olr 7/2[V06
4lh"Qtf 11/8.06
1st Qtr2/2807
2nd Olr &27.0;
3rdQlr8.15'07
athOtr 1(Via07
1siQtr3/2a.o"B"""
Znd Olr 6.2508
3rd Qtr 9/10*06
4th Otr ^o/^5•X}e
1st Otr 3/4/09
TW4-10
1st Qtr 3/16/05
2nd Qtr S25.135
SrdOtrft'Sl.tDS
4th Qtr 12/7/05
1st Qtr 3'a'06
2nd Qir 6/14/06
3rd Ott 7/20/06"
ilh Qtf 1 l.^a'06
1stQ1r2;2B/07
2ndQtr6.27.07
3rd Qtr S'l 5/07
4th"Qtr 10*10.07
l3t Olr 3,2608
2nd Olr &25.'08
3rdQlra/lCV08
4th Qtr 10/15.08
4th Otr n/iaw
1 si Qtr 3.11 09
TW4-11
Isl Qtr 316.05
Znd Qlr S2505
3nJ Qtr a'31/05
4tti Qlr 12r7.'05
lst""6tr 3/9/06
2nd Qtr 6/14/06
3rd Qir 7/20/06
4ih Oir 1 l/a'06
IatOtt2/28.'07
2nd Qtr 6/27/0/
3rdOtra'1S'07
41h Qtrl 0/1 (V07
1st Olr 3-28/08
Znd Otr 6/25/08
3rd Otr 9/10.03
4th Qtr ia 15/08
4thQtrll/lB/09
1st Qlr ai 1/09
TW4-12
I3tblrai6'05
Znd Olr 52S05
3rd Olr 8/31/05
athQtrl27.05
lstQtr3.'9/06
2nd Olr & 14-06
3fd Qtr 7/20^36
4thOir I1/a06
ls1Qtr2-2a.07
2nd Qtr 6.270/
3fdQtr8-^l5'07
4th Otr WWOT
1st a r 3/28/08
Znd Qtr" 9^5-08
3rdQtr9/10^08
4th Oir lCV15.'0a
1st Orr 3'11/09
^^^^^^=^^^
Carbon Tetrachloride
(5M9^)
NA
NA
tl.O
.-1.0
tl.O
tl.O
tl.O
tl 0
tlO
'.•1 0
tio
tl 0
ti 0
tl.O
tl 0
tlO
tl.O
NA
NA
t2 5
<2b
t5 0
t5 0
tS.O
tl 0
tl 0
tl.O
tl.O
tl.O
tl.O
tl.O
tl 0
NA
t20
tl 0
NA
^JA
<10
<100
<50
<so
<50
1 7
1.3
1.6
1 7
1 6
tl d
tl.O
tl.O
NA
t2 0
il.O
NA
NA
tl 0 "
tl 0
tlO
tl 0
ti 0
tl 0
tl 0
< 1 D
tl 0
tl.O
tl 0
tl 0
tl 0
tl.D
--1 0
Paranwter
GWQS
Chloride
No GWQS
NA
NA
NA
42
38
39
41
44
44
" " " 42
36
40
35
35
26
56
30
NA
WA
NA
52
50
54
61
58
2
54
59
59
55
58
51
61
NA
64
NA
^•A"
NA
SB
56
56
.15
55
54
53
53
53
63
46
42
47
NA
49
NA
NA
NA
19
19
16
16
16
16
IB
"29
16
16
19
16
22
23
Chloroform
(TOpgfl.)
36
1 2
tl.O
tio
tio
19
tl 0
tl.O
tl.O
21
9.5
8.7
1 3
1
tl.O
tl.o""""
•=10
• ,140
624
'-:"::ilO
' 300
• ".^=£190
. '=-=; 300
...... -..= 504
.=7 452
.-^-zzy. 500
~ j= 350
- : " "660
* • .-470
: : 620
,.'• T2Q
-- ^-660
NA
;i.20o
ililOO
, - -^4.400
3.590
. ~~: 4,400
J- :^3 4.400
zziZEZ 4.400
iJz'T 4.300
.:..z.^^.. 4.080
i-i-~ • 3,660
'•"^- 3,600
3,600
1 4,500
4,400
r^340
-- • -1=640
. - -:-11900
NA
y: "31,000
^..-%^ 1,000
tl.O
tl.O
tl.O
ti.o""""
tl.O
tTO
tiO
tl 0
tl 0
tl.O
tl 0
tl 0
tl.O
tl.O
tl 0
t.l 0
tl.O
Chloromethans
(30 pg/L)
NA
NA
2.9
.:1.0
2.6
2.7
tl.O
tl.O
tl.O
tl 0
-.1 0
tl 0
tl 0
tl 0
tl.O
•cl.O
tl.O
NA
NA
6.2
t2 5
t5 0
t5 0
t50
1 6
<i.D
'-•1 0
tl 0
tl.O
tl o"
tl.O
tl.O
NA
t2.0
tl.O
NA
NA
tlO
<700
<50
<so
<50
27
tio
tl.O
tl.O
tl.O
tio
^1.0
tl 0
NA
<2.0
tl 0
NA
NA
5.6
1
2.6
1.4
1.4
tl.O
tl.O
tl.O
tl.O
tl.O
tl C)
tl.O
<10
tl 0
tl.O
Meihylene Chloride
(5M9fl-)
NA
NA
tl.O
'•.^ 0
tl.O
ti.d"
tl.O
tl.O
tl.O
tl.O
tl.O
-.•1.0
tl 0
tl 0
tl.O
tl.O
tl 0
NA
NA
t2.5
t2 5
t5 0
t5 0
t5 0
tl 0
tl D
tl 0
tl 0
tl 0
t.1.0
tl.O
tl.O
NA
t.2.0
tl.O "
NA
NA
tfO
<700
<50
<S0
<50
1.3
1.6
tt.O
tl.O
1.2
tiO
tl 0
tl 0
NA
t2.0
'<io
NA
NA
tl 0
tl.O
tl.O
tl 0
tl 0
tl.O
tl 0
tl.O
tl.O
tl.O
tl.O
tl.O
<i.o
tl.O
tl.O
\
Nitrate. Nitrate -f Nllrlte
(10 mg/L)
I 3
1 3
1 3
1 3
1 5
15
09
0.7
O.e
1 3
I.e
2
21
2 3
2.79
1.99
25
1 6
0 8
""i!i
3.3
24
3.5
68
5.7
7.3
5.1
7.3
67
73
9.9
9.23
"-•=^ 10.5
NA
.i™=- - 11.6
8 7
10 3
94
9.4
9.2
10.0
100
10.0
ZF=3 '- -- "101
=:y ' • "" 106
f"" " ••' ' ^- 10.2
9B
7 7
73
79
^•5
NA
7.3
1.4
16
1.5
1.4
1.3
1.4
l.J
1 A
l.fi
15
1.4
1.4
1 6
2 7
2.r
25
24
NA ^ not anaiyiPd
NS - not samplsd
Shaded indicates concenirations occeeding GWQS
Bold and italics indicates the MDL e:cceeded ihs GWQS.
15t Otr - .January Marr.h
2nd Qtr - April June
3rd Qtr - July - Septeniber
41h Ol' = Oclober - Decen-.bei
TABLE 1
HISTORIC SUMMARY QF MONITORING PARAMETERS UP TO THE 1 ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHtTE MESA MILL
Well
Sampling Event
TW4-13
1st Otr 1^16/05
2nd Qtr 5/25.05
3rdOtra'31/D5
ilh Olr 12/7/05
1st Oir 3*9/06
Znd Otr 6/14/06
3rd Qtr 7/2*06
41h Citri i/a.'06
I3t Olr 2/26^07
2ndQtr6/27/6^7""
3rdOtra^15'07
4ttiQtr10/1ll07
ISI Qtf 3/26/06
Znd Olr 6/2&08
3rdOlr9^1Qfl3e
4th Otr lCyi5/08
1st Qtr 3*4/09
TW4-14
Isi Qtr 3/16/05
Znd Qt^ 5/25/05
Snaotra/Sl-XB
4th Qlr 12/7/05"
1st Otr 19/06
Znd Qtr 6/14/06
3id Otr 7/2iv06
41h Qlr 11.^a*06
lstOlr2/2B/07
?nd Otf 6.'27/07
3rd Qtr a/1 M7
41h Qtr 10/^07
IstOif a/2a'0B
Zna Qtr 6/25,'08
Srd Olr a/1 [V08
4tn Qtr 10/15^6
1st Qtr 3*4-09
TW4-1S
Isl Qtr 3/16/05
Znd Olr 5.25'05
3rd Oti 8.31/05
4th Otr 12/7/05
1st Qtr 3/9/06
2nd "Qtr 6*14/06
Srd Qtr 7/20AD6
4lti Olr 11/6/06
1st Otr 2/28,07
2nd oil 6/27.07
SfdOtrft'ld/b?"
41h Qtr lO'l WOT
lstOtra'28/08
2nd Otr 6/25/Oe
3rdOtrEV1CV08
41hQI( itvia'OB
1st Oir 3*4*09
TW4-ie
1st Qtr 3.16/05
2nd Qtr S'25/05
3rd Qir ai:31/05
ith Qtr 127/05
l3tOtrS9/06 "
^ndOir&I4/06
3rd Qtr 7/20136
4th Qtr 11.8/06
1s1Q^^^•2a/07
Znd Olr 6.27/07
3rd Qtr 8/15.07
4th Otr 10/10*07
ist"Qt"r""32aoe
Znd Qtr 6*25.06
Srd Qtr 9/10/08
4th"oir iD/15.'03
lstOtr3'4,09
Carbon Tetrachloride
(5 pg/L)
NA
NA
tl.O
tl.O
tl.O
tl.O
tl.O
tlO
tl 0
tl 0
tl 0
tl 0
ti.o
tl.O
tl.O ""
tlO
tl 0
NS"
NS
NS
NS
NS
NS
NS
tl.O
tio
tl.O
tl 0
tl 6
tl.O
tl 0
tl 0
tio
tl.O
NA
NA
tl.O
tl 0
tl 0
tl.O
tl.O
tl 0
tl.O
t.1.0
tl.O
tl.O
.:1.0
tl.O "
-•1.0
tl.O ""
tl.O
NA
NA
t! 0
tl.O
ti.o
fl.O
tl.O
tio
tl 0 "
tl 0
<1.0
•:1 0
tio
tl.O
tl 0
tl.O
tl.O
Parameter
GWOS
Chloride
No GWQS
NA
NA
NA
NS
NS
NS
NS
NS
NS
NS
NA
NA
NA
NA
NA
NA
89
67
66
65
33
59
59
58
58
54
58
50
58
58
37
38
36
36
38
57
35
34
40
35
64
60
55
60
" 62
79
75
65
69
52
56
71
89
73
41
36
35
35
34
30
28
32
27
23
23
26
30
29
Chloroform
<70\,gn.)
tl 0
tl 0
tl.O
tl 0
tl.O
tl.O
tl.O
ti.b
tl.O
tl.O
tl.O
tl 0
tl.O
tl.O
tl.O
tl 0
tio
NS
NS
NS
NS
NS
NS
NS
NS
•.-10
tiO
•cl.o
^•.^ 0
tl.O
ti.b"
tl.O
tl.O
tl.O
240 i-i?^
-^:-5=~f.212
Tf:ry=-: B5
14
39
13
5.2
136
87
2.6
7.1
1 4
11
tl 0
10
3.9
tiO
38
29.8
39
14
12
12
106
12 5
92
8
8!9
7.4
64
57
8
94
11
Chloromethane
{30 (.g/L)
NA
NA
31
tl.O
1.7
\.^
<).0
tl.O
^1 0
^10"
-.10
tl 0
ti.o
tl.O
-• 1 0 "
tl 0
'Tl.O
NS
NS
NS
NS
NS
NS
NS
tl.O
-.-1.0
.1.0
-.1.0
tl.O
tl.O
tl.O
tl.O
tl 6
tlO
NA
NA
3.2
2.6
I 1
24
tl.O
<10
tio
tio
cl.o
tl 0
tl.O "
-:1 0
tl.O
tl.O
tl.O
NA
NA
28
1.1
16
27
tlO
tlO
^•1 0
<1 0
tl 0
tl.O
tl 0
tl.O
tl 0
•It 0
tl 0
Methylene Chloride
(5tjg*L)
NA
NA
tl 0
tl.O
.-1.0
tl.O
tl 0
tl 0
tl 0
-.1 0
tl 0
tl 0
tl 0
tl.O
t i"6
tio
tl.O
NS
NS
NS
NS
NS
NS
NS
tio
tl 0
tl.O
tl 0
<i.o "
-1.0
tl.O
tl.O
tl 0
-ri.o
NA
NA
:" ": 5 = •- -" ;
'_.:••": •
z ., -£ ,..>==-"=™
.:1 0
• • • "zyy yy z"
•••' = ™- • -."- y.
tl.O
NA
NA
tl.O
-•1.0
tl.O
tl 0
-.•1 0
tl.O
tio
tl 0
tl 0
tl 0
tl 0
<1 0
tl 0
tl 0
tl.O
=543
-5.9
21
89
27
9.2
6.6
1 8
51
1
26
=il4
6.6
Nitrate, Nitrate -i-
(lOmgrt,)
NS
HS
NS
NS
NS
NS
NS
tO.1
tO.l
tO.1
" yzzz. \ : ':
;-=I=/, ,-. ^-r -^
• ^ - ].. "
^ '-z
Nitrile
42
4"3
46
43
"4!2
i.9
4.3
0.8
4.0
""" 4.6
4.4
4 1
aa
4.2
4!3
46
37
2.4
23
1.4
1 1
08
04
1.6
1.3B
0.76
1 6
1.4
3
1 9
2.H
5.6
• 12.3
9.9
5.4
44
tOl
1 5
=-' 10.5
9B2
96
-""14 1
12.9
13.3
7.3
5.9
47
61
57
51
49
5
i.A
0.7
4.6
" 4 86
"5 15
5.2
NA = nol analysed
NS = ret sampled
Shaded indicates concentrations exceeding GWQS
Brtd and italics indicates ihe MDL exceeded Hie GWOS
Ist Qtr - January - March
2ncJ Qtr = April - June
3rd Otr ^ .July - September
4ih Olr ^ October - December
TABLE 1
HISTORIC SUMMARV OF MONRRORING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MU.L
Well
Sampling Event
rW4-19
lat Otr a/16/05
2nd Qtr 5/25/05
3rd"Qtr&'31/05
4th Qtr 12/7.05
1siOtr3'&'06
2ndQtr6/14A)6
3rel"atr 7.-2CV06
4th Oir 1 i.'aoe"
Isi Qtr 2/28/07
2nd Qtf li'ZT/ri?
Srd Otr a/15*07
ath Otr 1CV10.07
1stQtra28/0a
2nd Olr 6.-.2!VOe
Srd Olr 9/10*06
41(1 Qtr I(V 15/06
I3t Qlf 3/4/09
rW4-20
1st Otr SI6*05"
2nd Qtr 5'2505
3rdOire/31/05
41h Qlr 12/7/05
1st Olr 19/06
2ndOtr6.'14/06
3rd Otr 7/20/06
4.1hOli"l1'a.'06
ISt Otr 2/2a'07
2nd Qtr 6/27/07
3rd Qtr 8/10/07
4thQtr KVIOO?
1slQtr3'28/0B
Znd Otr 6.25/08
3rdQtrW10-T38
4th bir 1{V15.'08
131 Otr 3/4/09
TW4-21
Isl Qtr 3i-15/05
?nd Otr 5/25'05
Srd Qtr 8/31*05
4th Otr 12/7/05
lstQtra'9.06
Znd Olr 6*14/06
3rd Olr 7/20-06
4th Qtf ii.a/oe
1st Qtr 2/28*07
2nd Qtr 6/2707
3rdOlra*1fv07
4thQtr 1Q.10/07
l3tOlr3/2a.0B
2nd Qtr 6.25/08
Srd Otr 9/1008
4ihQtT 10.15'08
41h01r 11/16'09
latatra.li/09
TW4-22
lstOtr:Ma'05
Znd Qtr 5/2.5.05
Srd Qtr 8/31.05
4th Qlr 12/7/05
131 Qtr 3/9/06
2nd Qlf 6/14-06
3rd Qtr 7/20/06
ath Qtr ll/B/06
lsiQtr2/2a07
2nd Olr 6/27/U7
3rd Olr 8/15.07
4tnQtr 10/i0^07
lStQlr3/2aDB
2nd Oir 625/08
3r"d""Olra/lCV08
4th Qtr 10/1506
41hQtr 11/1 a09
1atQlt3,^11/QG
Parameter
GWQS
Carbon Tetrachlor Ms
(5 Mg/L)
NA
NA
t5.0
<50
^50
<50
<50
tio
8.6 ~,^,
12' '--=1 •
12
NA" "
<10
<2'50
<5O0
<500' "
t7000
=-; -
, -yz^
• '-=1
..•- ==
NA
5 7 • Z
NA
t5 0
tl.O
..2.5
t2 5
t2 5
tlO
tl.O
..:
NA
2
tl.O
NA
t5 0
t5 0
<T0
<10
<10
<I 0
tl.D
tl 0
tl.O
.^1 0
tl 0
tl 0
1.3
NA
-.2 0
tlO
1 6
1.3
Chloride
No GWQS
NA
NA
NA
81
BG
116
123
134
133
Chlorolorm
(70ii9*L)
1 ^ 2.200
• • 1.200
1.400
"""""-". 2.800
1.200
^'^ -•' I.too
^Fl-F 1.120
-„="='1,050
' . 1,200
Chlorometharw
(30 frig/L)
NA
NA
t5 0
<50
<.50
<50
<50
26
tl 0
Methylene Chloride
{SiigiL)
NA
NA
•:5.0
<50
<S0
<50
<50
tl 0
ttO
Did not sample
1 9
1 9
2.9
• •.••:-,
129
132
131
12B
113
124
127 "
1.100
• 1.100
1.800
"- .1.000
^3.800
4.200
"=-=, 1.100
tl 0
tio
-i.b
tl.O
tl.O
tl 0
tl.O
tl.O
tl 0
.-•1.0
tl.O
tl.O
tl.O
tl.O
Monitor well was not installed
7.1
3.1
2.2
35
^56.6
=""- • "^0
4'\ .zk.Y2
15
y--y"' , :_
NA
NA
131
120
235
134
124
124
112
117
170
132
191
156
168
164
: =^,39.000
: ~ ^3.800
"-"^^-19.000
• ^ 9.200
: 61.000
5.300
- 11.000
• 4.400
1.800
??"-"""^5,200
rl - 9.000
=== 13.000
?i^*--30.000
21.000
NA
€: 171^--8.200
NA
tlO
<250
<soo
<50Q
<1000
1.9
tl 0
tl.O
tl 0
tl 0
tl.O
^1.0
tl.O
NA
t-l 0
NA
<TD
<250
tSOO
<500
<1000
-;1.0
~.. "• ,::==- .".
Monitor well was not InsLalled
2
18
?==(= 5 6
.........^. ^ J,
"l 7
1.6
NA
NA
353
347
316
357
296
306
327
300
268
331
271
"2*4
264
NA
279
^192
. -. ' '~~=:-78
- 86
120
120
- 106
139
160
300
"140
120
390
..• i==,180
- - ~F,120
NA
- = 170
160
NA
-.5.0
tl.O
t2.5
t2 5
t2.5
il.O
tl 0
tl.O
tl.O
•n.o
tl 0
tl 0
tl 0
NA
.-2.0
-.10
NA
tS.O
tl.O
t.2.5
..2.5
<2.5
tl.O
tl.O
-.1 0
tl 0
.:1 0
tl.O
--1 0
-.1 0
t2 0
tl 0
Monilor well was not installed
NA
NA
253
236
221
221
236
347
273
2;i9
236
519
271
524
539
NA
177
Ty. z~ 340
-= •- •: 290
=---=', "320
"JIL1--390
J- -"--260
864
,350
"-=•440
iiaa
530
.440
;; 1400
f- 1200
- - 6300
NA
:.-"63b
, -3 390
NA
t5 0
t5.0
tio
tlO
..10
1 6
tl 0
tl.O
tl.O
tl 0
tl 0
tl.O
tl 0
NA
t2.0
•;1 0
NA
t50
-.5 0
<10
<w <w
tl.O
tl.O
tl 0
tl 0 "
tl.O
tl.O
tl.O
•;i 0
•c2 0
tlO
2.2
1 1
1.8
1.9
1.5
1 2
3.7
NA
-5.2
NA
NA
Nitrate, Nitrate •»• Nitrite
(10 mg/L)
5.3
57
46
tO.1
4
5.2
43
46
4
4.1
4
2.2
2.8
• -= ==-^35 2
. ' -:• -^ T==~'47.8
32
=••• • -'..zyyz.. -. __io.i
29
1 8
3.8
9.4
29
35
42
23
21
5.6
0.9
8
444
5 51
5.1
r'~ <-^ t4!B
.••,:. - yyzy "lo.i
9 6
ef
• . -^ = :F:==10 2
89
87
B.7
8.6
8.6
83
. "-=.. -•---i^^ • -•14"3
8""8
7.57
8
NA
8.3
-#"" .*=-il" , 1,18.2
-L% -z %"=, - I- 15.7
--^3, . '- -r --'.IS.!
"ry .. ' " 153^
-.-=-k . - -.^-- 14.3
- - .y 14.5
•::%==15G
:-z=y. _ -"===209
• =§!_=" • =„===19.3
" "-'':i9 3
,18.8
= " - • 39'1
„= - -41.9
- i::il "-387
- = ,= 36.3
NA
z^ryz, 20 7
NA-not analyzed
NS = not sampled
Shaded indicates concentrations exceeding GWOS
Bold and hafcs indicates tne MDL enceedea ihe GWOS
Isl Otr - January - March
2nd Qtr = AonI • June
3rd Qtr ^ July September
4th Qlr - Oaober - Decemoer
TABLE 1
HISTORIC SUMMARY OF MONITORING PARAMETERS UP TO THE 15T QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
Well
Sampling Event
rW4-23
Znd Qir S*27/07
3tdQlra.^l5/07
4th Otr lCyiO/07
1st Qtr 3/28*06
Znd Qtr 6/2ry08
Srd Qti 9/10/be
ithOtr 1O15.'0B
4th Otr 11/13.09
ist Qtr 3.'409
TW4-24
2nd Qtr 6.27;07
3rdQtrai5*07
ath Otr 10*10/07
Isi Qtf 3/28/08
Znd Otr 6/25/OB
3idQtr9/10.'08
4th Oir l(Vl5/0e
4thOlr1i/ia/09
istOtr3'4/09
TW4-a5
Znd Qtr 6/27.07
U3rd Qlf 8/15/07
4th Qtr ItVKVij?
1siQtr3'28/0a
Znd Otr 6/25/06
BrdOtrWlO/Oa
41h01f IQ'15/08
41h Qlr 11/18/09
1st Qtr 14.09
Carbon Telfachloride
(5 Ufl/L)
tl.O
tl.O
tl 6
tio
tio
tio
NA
<2.Q
tl.O
ti"6
tl.O
tl.O
tl.O
tl.O
.-.1.0
NA
^2 0
tl.O
tl.O
•.•:1.0
tl 0
tl 0
tl 0
tl.O
NA
<2.0
tl 0
Parameter
aWDS
Chloride
No GWQS
47
46
43
•41
41
35
51
NA
41
770
" "791
692
740
" 834
1180
1130
NA
1010
395
382
358
374
344
333
366
NA
332
Chloroform
nomTL)
tl 0
t.1.0
tl.O
tl.O
tio
<10
NA
f2 0
tio
2.6
a.2
15
1.5
1 4
2.9
N"A
t2.0
14
tl.O
22
tl.O
tl.O
<^.o
tl.O
NA
t2.0
tl.O
Chloromethane
(30 MS'Ll
tl 0
tl.O
tl.O
<1.0
<1 0
tl.O
NA
t2 0
tl.O
t.1.0
tl.O
tl.O
tl.O
tl.O
tl.O
NA
<2.0
tl.O
tl 0
tl.o" "
tlO
tl 0
tlO
tlO
NA
t.2 0
tilo
Methylene Chloride
(5 Pfl/L)
tlO
t.lO
-1.0
tio
tio
tio
NA
t?0
tl 0
tl.O
.^1 0
tl 0
tl 0
tl 0
tlO
NA
t2.0
•:1.0
tl 0
tl.D
tl.O
KIO
tl 0
.;! 0
NA
t2 0
tl D
Nitrate, Nitrate •••
[10 mcj/L)
tO.l
-•.o.t
t6"i"
tOl
tOI
td 05
t.0 05
NA
<0.1
-
-•.
NA
• ,_•>=,, ^ .
• .-==3; y^ : -
-ir€=' =-.
,=== - . „=-"-,.. . -.
"T""'~ =^
-y ~
i=Z "
NA
Z="
Nitrite
1 1 1 1
1 1 [
261
--29
-. 24.7
24.4
453
38.^
448
305
.17.1
"" 2S
17
. 18 7
-22.t
18 8
213
-15.3
TABLE 1
HISTORIC SUMMARY OF MONRORING PARAMETERS UP TO THE 1ST QUARTER 2009
CHLOROFORM CONTAMINATION INVESTIGATION
DUSA WHITE MESA MILL
NA = not analyzed
NS = not sampled
Shaded indicates concentrations exceeding GWQS
Bold and italics indicates the MDL enceeded the GWOS.
1st Otr = January - March
2ndOtr = Apnl-June
3rO Otr = July - Sepiember
4th Qtr = October • December
Well
Sampling Event
Parameter
GWQS
Carbon Tetrachloride
(S pfl/L)
TW4-60 (Dl Blank)
1st Otr 3/16*05
2nd Otr 5/25*05
3rdOtra-31/05
41h Olr 12/7/05
1st Qtr 3*9/06
2nd Olr 6'14/06
4th Otr 1 l/a'06
lslQtr2/2a*07
Znd Oti 6/27/07
3tdOtrai&'07
4thQtrlO/10'07
1st Olr 3*28/08
2nd dir 6/25/08
3rd Otr 9/8/08
istotraaw
rW4-62
IStQtr3/3«9
2nd Olr 5*25/05
Srd Qtr a'SI/OS
4lh Otf 12/7/05
1st Olr 3/9/06
Srd Qtr 7/2CV06
1st Oir 2/28/07
Znd Otr 6/27A37
Srd Qtr 6*15*07
41hOir 1W10/07
1st Otr 328rt36
Znd Qtr 6/25*08
3fd Oir 9/a'08
131 Qtr 3/3/09
NA
NA
tl 0
tl.O
tl.O
tl.O
tl.O
tl.O
tl.O
tl 0
tl 0
tio
tio
tio
tio
Chloride
No GWOS
NA
NA
NA
tl.O
tl.O
tl.O
tl 0
tl.O
tl.O
tio
tio
tl.O
tl.O
tl.O
tl.O
Chloroform
(70 uaiL)
tl.O
37 6
27
tl.O
tl.O
tl.O
tl.O
25
.-•- •. 190
tl.O
57
1.1
13
3
33
Cant (Ind reason lor TW4.-62 in texled
tl.O
NA
•:2s
<100
<50
<so
tl.O
tl.O
tlO
tlO
tlO
tl.O
tl.O
tl.O
TW4-e5 (dup of TW4-20)
4th Olr 11/8/06
1st Otr 2/28*07
Znd Otr 6/27/07
3rdQtrB/15.07
4th Qtr ICVlCV07
l3tOtr3/2ane
•>--•• "k. .-.9.7
-3ir..=rii ..^.^..^8.3
1.9
„-" -.^v..--' - "~-;.-'i9
32
- .^-^ - ^ 8 2
TW4-65 (dup oT TW4-5)
4t"h"'Qir ii.'aoe Itio
rW4-65 (dup of MW-32 former TW4-17)
2nd Qtr 6/25*06 tl 0
lstQlra'4/09 tio
TW4-65 (dup Of TW4-3)
3fdOlr9/1CV0e [<i.b
TW4-70 (dup Of TW4-2>
1st"'Qtri4/09" |2.1
TW4-70 (dup or TW4-8>
2nd Otr 6/2&*08 |<1 0
TW4-70 (dup Of MW-26 former T1W4-15)
l3t Qtr 2/2807
2nd Qlr a27/07
3ni Qtr 8/15*07
4th Qtr lCV10f07
tl.O
tl.O
tl.O
tio
TW4-70 (dup of MW-32 former TW4-17)
lstOlr3'28/08
SrdOlra'KVOe
TW4-73
3rd Otr 9/909
TW4-73
lstOtr3/10«)9
<1.0
tl.O
tl 0
NA
NA
51
52
48
tl.O
tio
tl.O
tl 0
tl.O
tl 0
tl.O
tl.O
125
139
125
137
176
137
56
2S
31
IE
4.1^
45
55
53
51
58
31
31
34
. 3.500
~ 3.100
--- • 3.200
=1- -3.300
:== . 2.800
20
50
tl.O
I
1.5
tl.O
3
to
--"^-13.700
, ••16.000
yzrl 1,766
7^ 27.000
.- 3.600
.- • 12,000
53
tio
tl 0
tl.O
3100
tl.O
41
-, • 400
•-•:^. 440
-' --^c1.700
tl.O
tlO
Cant find reason lor TW4-73 m texled
tlO ltl In
Cant tind reason lorTW4-7S in texled
tl.O |t1 |l9
Chloromethane
(30 P3/L)
NA
NA
24
tl.O
1.5
1.1
1.3
tlO
tio
tiO
tio
tio
tl.O
tl.O
tiO
tl.O
NA
t25
<TOD
<50
<S0
tl.O
tl.O
tl.O
tl.O
tl 0
1.4
tio
tl 0
IB
tl.O
tl 0
tio
tl.O
tl.O
tl.O
<1.0
•=10
tl.O
tl.O
tl.O
<1 0
tl 0
tl.O
tl 0
<1 0
tl 0
tl.O
tl 0
Methylene Chlorid*
(5 Mg/L)
NA
NA
tl 0
tl.O
tl.O
t.1.0
tl 0
tlO
<10
tl 0
tl 0
tl 0
ti" 6
tl.O
tl 0
tl.O
NA
<25
<100
<50
<50
tl.O
tio
tl.O
tl 0
tl 0
tio
tl 0
tl.O
2.2
1
tl 0
tl.O
22
1 2
tl.O
tl.O
tl 0
tio
•^1.0
tio
tl.O
18
tl.O
tl 0
tl.O
<1 0
tl.O
tl.O
Niiraie
tO 1
tO f
<0.1
<0.1
tO.1
t0.1
t.l
tOI
tOI
tO.1
tO.l
tO.l
t0.05
tO05
tO05
t0.05
-; - -
tOI
tO.I
tO 1
tO.1
t0.05
<0.05
tO.l
t0 05
tOl
272
7
tl.O
tO 1
t0.05
t0.05
t0 05
NHrate -f Nitrite
:iDmg/L)
' = ^ 10.2
68
6.6
B.2
5.4
0.1
1 5
4.2
I.E
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Table 3
1st Quarter 2009 Sampling Order
The correct 3rd Quarter 2008 Purging Order (lowest concentration to
highest concentration) BasecJ the Chloroform Concentrations in the 2nd
Qtr 2008 Sampiinq Event
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Well
TW4-3
TW4-8
TW4-9
TW4-12
TW4-13
TW4-14
TW4-23
TW4-24
TW4-25
MW-32 (TW4-17)
TW4-16
TW4-18
TW4-5
TW4-6
TW4-21
TW4-22
TW4-11
TW4-10
TW4-1
'MW-26(TW4-15)
'MW-4
TW4-4
TW4-7
TW4-2
•TW4-19
•TW4-20
Chlorotorm (pq/L)
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<2.0
<2.0
<1.0
4
9
10
37
170
630
1.000
1,200
1,700
1,700
2,100
2,500
2,500
3,200
4,200
H^
* Pumping well
DUSA Purging Order for the 3rd Qurater 2008 Sampling Event
Order
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Well
rW4-25
TW4-24
TW4-9
TW4-3
TW4-8
TW4-23
TW4-13
TW4.12
TW4-16
TW4-18
TW4-5
TW4-4
MW-32
•TW4-20
'MW-26
'MW-4
'TW4-19
TW4-14
TW4-6
TW4-21
TW4.22
TW4-11
TW4-10
TW4-1
TW4-7
TW4-2
Chloroform fpcj/L)
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
11
t2
2.200
<1.0
8,200
950
2,200
1,100
t:1.0
81
180
390
1.000
1,100
1.700
1.B00
3.100
Date/Time
3-3-0a'830
3-3-09/905
3-3-09/92d
3-3-09/1034
3-3-09/1051
3-3-09/1109
3-3-09/1214
3-3-09/1235
3-3-09/1258
3-3-09/1325
3-3-09/1345
3-3-09/1402
3-4-09/800
3-4-09/855
3-4-09/901
3-4-09/907
3-4-09/924
3-4-09/1022
3-10-09/848
3-10-09/908
3-10-09/935
3-10-09/950
3-10-09/1005
3-10-09/1023
3-10-09/1036
3-10-09/1053
TW4-M was sampled out Ol order. However it does not appeared any cross
contamination occurred.
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Attachment 2
DUSA 1'* Quarter 2009 Groundwater Contour Map
Peel 1993 Groundwater Contour Map
DUSA 1« Quarter 2009 Groundwater Contour Map
FM.7I....L;LJ l:.J. M'M :M-::M':~M':
• ^ • '. •• •"*' • ^y^y''-^yR-^4^^^^^^^
0 5S56
PIEZ-1
• 5593
MW3I
-^ 55^6
KJ^5573
temporary parched nwnitOTing well
showing elevalion In feel amsl
perched piezometer showing
elevation In Ieet amsJ
perched monitoring well Installed April, 2005
showing etevation in feel amsl
temporary perched monitoring well installed
April, 2005 showing elevation in feet amsl
temporary perched monitoring well Insialled
May, 2007 showing approximate etevation
in toat amtl , ,••,-
NOTES: Locations and elevations for TW4-23, TW4-24, and TW4-25 are approximate
HYDRO
GEO
CHEM, INC.
KRIGED 1st QUARTER, 2009 WATER
WHITE MESA SITE
LEVELS
APPROVED
SJS
REFEHFNCF
H1/718000/may09/wl0309, srf
Ptel 1993 Groundwater Conlour Map
a22_L
Phreatic Surface ot the Ground Water in the Burro Canyon Formation
Beneath the White Mesa Mill Site.
Figure 5.2 .2 - 1
Attachment 3
DUSA and DRC Chloroform Isoconcentration Maps,
and DRC Chloride and Nitrate Isoconcentration Map
DUSA Chloroform isoconcentration Map
'y\- *'^'':
.".•-PjTl
•Wr->y:.
ri •.;-. •-.
Ol7D0
PIEZ-1
0 NS
MW-32
•^180
EXPLANATION
perchad monitoring well showing
concentratton In vGA
temporary parched monitoring well
showing concentration in uG/l
perchad piezometer (not sampled)
perched monitoring well installed April. 2005
showing concentration In uG/l
tenipoiaTy patched cnonitorlng weH in&talled
April, 2005 showing concentration ki uG/l
temporary perched monitoring well installed
May, 2007 showing concentration In uG/l
NOTES: ND = not detected, NS = not sampled
^^ HYDRO
^^m GEO
-Y^- CHEM, INC.
KRIGED 1st QUARTER, 2009 CHLOROFORM (uG/L)
WHITE MESA SITE
APPflCJVED
SJS
flEFEREMCE
Hy71800(VmayO9/chlO309.srf
'""concentration Map
r 1 r •
:> I • I 1 l^ri.T"LJ^'^l.J"^^^^LJ"T-I LJ. Li l-J
EXPLANATION
'^^•^^/L /oc^^f/^ ^-^S^/^ c
0
N
0 150 300
SCALE IN FEET
nTW4-4
5550 temporary perched monitoring well
showing elevation in feet amsl
0 MW-32 perched monilonng well showing
5548 elevalion in Jeet amsl
HYDRO
GEO
CHEM, INC
, TW4-19, and TW4-20 are pumping wells
IS ol TW4-23, TW4-24 and TW4-25 are approximate
KRIGED 1st QUARTER, 2009 WATER LE\
AND ESTIMATED CAPTURE ZONES
WHITE MESA SITE
.' ^^'' ^"estimated capture zone NOTES: MW-4, MW-26, TW4-19, and TW4-20 are pum
f / boundary stream tubes Locations and elevations ol TW4-23, TW4-24 and TW4-^,. „,^ ^^.^..^ —
' ' resulting from pumping I — | KRIGED 1st QUARTER, 2009 WATER LEVELS
3 ESTIMATED CAPTURE ZONES
APPROVED
SJS
DATE
I iiviM I t-u w«r I uni-
WHITE MESA SITE
(detail map)
REFERENCE
H :/718000/may09/wi0309cz.sr[
FGURE
DRC Chloride and Nitrate Isoconcentration Map
Attachment 4
1"' Quarter 2009 Waler Levels and Estimated Capture Zones
p?]Mp:»:MPlMSM;-^^i^^^
."r-'.-^'.'-
EXPLANATION
/V ^^ estimated capture zone
boundary stream tubes
resulting from pumping
NOTES: MW-4. MW-26. TW4-19, and TW4-20 are pumping wells
Locations and elevations of TW4-23, TW4-24 and TW4-25 are approximate
0 150 300
SCALE IN FEET
nTW4-4
-5550 temporary perched monitoring well
showing elevation in feet amsl
0 MW-32 pgrched monitoring well showing
5548. • elevation in feet amsl
HYDRO
GEO
CHEM, INC.
KRIGED 1st QUARTER, 2009 WATER LEVELS
AND ESTIMATED CAPTURE ZONES
WHITE MESA SITE
(detail map)
APPROVED
SJS
REFERENCE
Hm 8000/may0a'wl0309c2.srf
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