DRC-2011-007560 - 0901a0688028b44c

DENISO
MINES
Denison Mines (USA) Corp.
1050 17th Street, Suite 950
Denver, CO 80265
USA
Tel: [phone]
Fax:[phone]
www.denisonmlnes.com
Novembers, 2011
VIA PDF AND FEDEX
Rusty Lundberg,
Co-Executive Secretary
Utah Water Quality Board
Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144850
Salt Lake City, UT 84114-4850
Re: State of Utah Ground Water Discharge Permit No. UGW370004
White Mesa Uranium Mill - Notice Pursuant to Part I.G.I (a)
Dear Mr. Lundberg:
The White Mesa Mill (the "Mill") performed third quarter ("Q3") groundwater monitoring
during the period from July 1, to September 21, 2011 under the February 15, 2011 and July 14,
2011 versions of the Mill's Groundwater Discharge Permits (the "GWDPs"). All analytical data
needed for comparison to the GWCLs was received during the period ending October 4, 2011.
Pursuant to Part LG.l.a) of the GWDP, (February 15, 2011 and July 14, 2011) please take notice
that the concentrations of specific constituents in the monitoring wells highlighted in yellow and
bold italics in the columns for the third quarter in the attached Table 1, exceeded their respective
GWCLs. For ease of review, Table 1 has been formatted to simplify the tracking of any
continued exceedances from one monitoring period to the next by charting ongoing monitoring
of the same well in the same row, and by highlighting exceedances (in color and bold italics).
Part I.G. 1 c) of the GWDP states "that the Permittee shall prepare and submit within 30 calendar
days to the Executive Secretary a plan and a time schedule for assessment of the sources, extent
and potential dispersion of the contamination, and an evaluation of potential remedial action to
restore and maintain groundwater quality to insure that Permit limits will not be exceeded at the
compliance monitoring point and that DMT or BAT will be reestablished." The summary below
relating to the third quarter 2011 exceedances includes, for each exceedance, a brief discussion
of whether such a plan and schedule is or is not required or appropriate at this time in light of
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other actions currently being undertaken by Denison, as determined by Utah Department of
Environmental Quality (UDEQ) Staff and as stated in teleconferences with Denison on April 27
and May 2, 2011. Based on the assessments noted below relating to the third quarter
exceedances, a plan and schedule for the third quarter 2011 exceedances will not be required for
the reasons stated.
Under the February 15, 2011 and July 14, 2011 revisions of the GWDP, GWCLs have been
determined on a well-by-well basis to reflect background groundwater quality, as defined by the
mean plus second standard deviation concentration, or the equivalent. Accordingly, the GWDP
requires that constituent concentrations in each monitoring well shall not exceed the GWCLs set
out in Table 2 of the GWDP. It should be noted that, because the GWCLs have been set at the
mean plus second standard deviation, or the equivalent, un-impacted groundwater would
normally be expected to exceed the GWCLs approximately 2.5% of the time. Therefore,
exceedances are expected in approximately 2.5% of all sample results, and do not necessarily
represent impacts to groundwater from Mill operations.
The following are items of note relevant to all exceedance data presented herein:
1. Nitrate + nitrite and chloride in monitoring wells at the site have been the subject of
ongoing investigations at the Mill. Based on the results of the previous investigations
Denison and the Executive Secretary acknowledge that it has not been possible to date to
determine the source(s), cause(s), attribution, magnitudes of contribution, and
proportion(s) of the local nitrate -I- nitrite and chloride in groundwater. Denison therefore
agreed to submit a Corrective Action Plan ("CAP") for nitrate -I- nitrite and chloride in
groundwater. Based on information provided by UDEQ in teleconferences on April 27,
and May 2, 2011, due to the ongoing activities and actions, the 30-day plan and schedule
for assessment is not required for nitrate -i- nitrite and chloride exceedances at this time.
2. As discussed in previous quarterly groundwater sampling reports, the background levels
and GWCLs for pH were established based on eight or more quarters of laboratory data,
which are historically higher than field data due to effects from the evolution of carbon
dioxide, and subsequent increase in pH from field to lab. Denison's letter to the Co-
Executive Secretary of the Utah Water Quality Board dated January 31, 2011 proposed
the recalculation of the GWCLs for field pH. Following the statistical evaluation of pH
data by Denison's geochemical consultant, INTERA, Inc., Denison compared the Mill's
most recent groundwater pH data from the second quarter of 2011, including accelerated
sampling results as recent as June 2011, and noted that all of the June 2011 groundwater
results, and many of the other results from the second quarter, were already outside the
revised GWCLs that were to be proposed in the June 30, 2011 letter. By the letter dated
June 30, 2011, Denison proposed to submit to DRC a Work Plan and Schedule to
complete investigations to address the site-wide pH issue, following a meeting with
DRC, to discuss Denison's findings to date and to agree upon the steps and milestone
dates to be incorporated in the Work Plan and Schedule. As of the date of this letter, the
requested meeting has not been scheduled, and as a result, the Work Plan and Schedule
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has not been submitted. Based on information provided by UDEQ in teleconferences on
April 27, and May 2, 2011, due to the current commitment to provide a Work Plan and
Schedule to evaluate site field Ph conditions, the 30-day plan and schedule for assessment
is not required for field pH exceedances.
1.0 Exceedances in Required Quarterly Sampling Wells
1.1 Quarterly Wells with Two Successive Exceedances
As indicated in the attached Table 1, the analytes discussed below exceeded their respective
GWCLs for two successive sampling periods as of the third quarter 2011. However, the 30-day
plan and schedule contemplated in Part I.G.I c) of the GWDP will not be required for these
particular consecutive exceedances which first occurred in the third quarter of 2011, for the
reasons stated below. One time exceedances and non-successive exceedances are noted on Table
1, but not listed below. Consecutive exceedances which occurred in previous reporting periods
are discussed in the respective Exceedance Notice for that quarter.
MW-14
• Field pH has been slightly outside (slightly lower than) the GWCL in MW-14 in the July
and August (Q3) sampling events. As mentioned above, site-wide pH issues and trends
are currently under re-evaluation.
MW-25
• Field pH has been slightly outside (slightly lower than) the GWCL in MW-25 in the July
and August (Q3) sampling events. As mentioned above, site-wide pH issues and trends
are currently under re-evaluation.
MW-26
• Chloroform in MW-26 has exceeded its GWCL for all of the monitoring periods for
2011. MW-26 is used as a pumping well for the ongoing chloroform capture program
and is expected to yield increased concentrations of chloroform.
• Methylene chloride in MW-26 exceeded its GWCL in the August (Q3) and September
monthly sampling events. MW-26 is used as a pumping well for the ongoing chloroform
capture program and is expected to yield increased concentrations of methylene chloride.
MW-26 Note: As stated in the September 2009 Statement of Basis (page 23) in support of the
January 20, 2010 revisions to the GWDP, "[i]t should be noted that, because MW-26 is a
pumping well for chloroform removal, concentrations of all constituents in that well are subject
to potential variation over time as a result of the pumping activity. This will be taken into
account by the Executive Secretary in determining compliance for this well." Based on
information provided by UDEQ in teleconferences on April 27, and May 2, 2011, due to the
current pumping status as part of the chloroform program, the 30-day plan and schedule for
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assessment is not required at this time for exceedances of chloroform and methylene chloride in
MW-26.
Field pH has been slightly outside (slightly lower than) the GWCL in MW-26 in the July,
August (Q3), and September sampling events. As mentioned above, site-wide pH issues
and trends are currently under re-evaluation.
Chloride concentration exceeded its GWCL in the July, August (Q3) and September
sampling events. As mentioned above, chloride concentrations are currently under re-
evaluation and a plan to address this consecutive exceedance is not necessary and is not
being submitted.
MW-30
Nitrate + nitrite concentration exceeded its GWCL in all sampling events during the third
quarter 2011 and during previous quarters. As mentioned above, nitrate -i- nitrite
concentrations are currently under re-evaluation, and a plan to address this consecutive
exceedance is not necessary and is not being submitted.
MW-31
Nitrate -i- nitrite concentration exceeded its GWCL in all sampling events during the third
quarter 2011 and during previous quarters. As mentioned above, nitrate -i- nitrite
concentrations are currently under re-evaluation, and a plan to address this consecutive
exceedance is not necessary and is not being submitted.
Chloride concentration exceeded its GWCL in all sampling events during the third
quarter 2011. As mentioned above, chloride concentrations are currently under re-
evaluation, and a plan to address this consecutive exceedance is not necessary and is not
being submitted.
Sulfate concentration exceeded its GWCL in the August (Q3) and September sampling
events. Sulfate concentrations exceeded the GWCLs in two consecutive sampling events
in Ql 2011. The consecutive sulfate exceedances noted in MW-31 in Q3 2011 were
previously discussed in the Ql 2011 Plan and Time Schedule Under Part LG.4 (d),
submitted to UDEQ on June 13, 2011. An additional plan or schedule to address the Q3
exceedances is not necessary and is not being submitted because the assessment
processes and schedule have not changed since the June 13, 2011 submission.
MW-35
Manganese concentration exceeded the GWCL in MW-35 in all of the Q3 sampling
events. The consecutive manganese exceedances noted in MW-35 were previously
discussed in the Plan and Time Schedule Under Part LG.4 (d), submitted to UDEQ on
September 7, 2011. An additional plan or schedule to address the Q3 exceedances is not
necessary and is not being submitted because the assessment processes and schedule have
not changed since the September 7, 2011 submission. It should be noted that background
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has not yet been established for MW-35 and that the interim GWCLs for MW-35 have
been set at a fraction of the Groundwater Quality Standards pending the determination of
background. Therefore, exceedances of the interim GWCLs do not necessarily represent
impacts to groundwater from Mill activities.
• Uranium concentration exceeded the GWCL in MW-35 in all of the Q3 sampling events.
The consecutive uranium exceedances noted in MW-35 were previously discussed in the
Plan and Time Schedule Under Part LG.4 (d), submitted to UDEQ on September 7,
2011. An additional plan or schedule to address the Q3 exceedances is not necessary and
is not being submitted because the assessment processes and schedule have not changed
since the September 7, 2011 submission. It should be noted that background has not yet
been established for MW-35 and that the interim GWCLs for MW-35 have been set at a
fraction of the Groundwater Quality Standards pending the determination of background.
Therefore, exceedances of the interim GWCLs do not necessarily represent impacts to
groundwater from Mill activities.
1.2 Quarterly Wells with New Exceedances Reported in Q3
New exceedances for the quarterly well sampling program are listed below. The exceedances
listed will result in an accelerated sampling frequency from quarterly to monthly. It is important
to note that the wells listed below will only be sampled during the monthly events for those
constituents which exceeded the GWCLs. The wells listed below will be sampled for all
constituents listed in the GWDP during the quarterly events as that is the regularly scheduled
sampling for the quarterly wells.
• Thallium in MW-35 exceeded the GWCL in the August (Q3) sampling event.
• Gross Alpha in MW-35 exceeded the GWCL in the August (Q3) sampling event.
It should be noted that background has not yet been established for MW-35 and that the interim
GWCLs for MW-35 have been set at a fraction of the Groundwater Quality Standards pending
the determination of background. Therefore, exceedances of the interim GWCLs do not
necessarily represent impacts to groundwater from Mill activities.
2.0 Exceedances in Semiannual Sampling Wells Accelerated to Quarterly
2.1 Semi-annual Wells with Two Successive Exceedances
As indicated in the attached Table 1, the analytes discussed below exceeded their respective
GWCLs for two successive sampling periods (Q2 [20111 and Q3 [20111).
MW-3
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2
sampling event and the Q3 sampling event. As mentioned above, site-wide pH issues and
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trends are currently under re-evaluation, and a plan and schedule to address this
consecutive exceedance is not necessary and is not being submitted.
• Selenium has exceeded the GWCL for both the Q2 sampling event and the Q3 sampling
event. The consecutive selenium exceedances noted in MW-3 were previously discussed
in the Plan and Time Schedule Under Part LG.4 (d), submitted to UDEQ on June 13,
2011. An additional plan or schedule to address the Q3 exceedances is not necessary and
is not being submitted because the assessment processes and schedule have not changed
since the June 13, 2011 submission.
MW-18
• Thallium has exceeded the GWCL for both the Q2 sampling event and the Q3 sampling
event. The consecutive thallium exceedances noted in MW-18 were previously discussed
in the Plan and Time Schedule Under Part LG.4 (d), submitted to UDEQ on June 13,
2011. An additional plan or schedule to address the Q3 exceedances is not necessary and
is not being submitted because the assessment processes and schedule have not changed
since the June 13, 2011 submission.
MW-24
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2
sampling event and the Q3 sampling event. As mentioned above, site-wide pH issues and
trends are currently under re-evaluation, and a plan and schedule to address this
consecutive exceedance is not necessary and is not being submitted.
MW-27
Nitrate -H Nitrite have exceeded the GWCL for both the Q2 sampling event and the Q3
sampling event and during previous quarters. As mentioned above, nitrate -i- nitrite
concentrations are currently under re-evaluation, and a plan to address this consecutive
exceedance is not necessary and is not being submitted.
Chloride has exceeded the GWCL for both the Q2 sampling event and the Q3 sampling
event and during previous quarters. As mentioned above, chloride concentrations are
currently under re-evaluation, and a plan to address this consecutive exceedance is not
necessary and is not being submitted.
TDS has exceeded the GWCL for both the Q2 sampling event and the Q3 sampling
event. The consecutive TDS exceedances noted in MW-27 were previously discussed in
the Plan and Time Schedule Under Part LG.4 (d), submitted to UDEQ on June 13, 2011.
An additional plan or schedule to address the Q3 exceedances is not necessary and is not
being submitted because the assessment processes and schedule have not changed since
the June 13, 2011 submission.
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MW-28
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2
sampling event and the Q3 sampling event and during previous quarters. As mentioned
above, site-wide pH issues and trends are currently under re-evaluation, and a plan and
schedule to address this consecutive exceedance is not necessary and is not being
submitted.
MW-29
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2
sampling event and the Q3 sampling events. As mentioned above, site-wide pH issues
and trends are currently under re-evaluation, and a plan and schedule to address this
consecutive exceedance is not necessary and is not being submitted.
MW-32
• Field pH has been slightly outside (shghtly lower than) the GWCL for both the Q2
sampling event and the Q3 sampling event and during previous quarters. As mentioned
above, site-wide pH issues and trends are currently under re-evaluation, and a plan and
schedule to address this consecutive exceedance is not necessary and is not being
submitted.
2.1 Semi-annual Wells with New Exceedances Reported in Q3
New exceedances for the semi-annual well sampling program are listed below. The exceedances
listed will result in an accelerated sampling frequency from semi-annually to quarterly. It is
important to note that during the first and third quarterly events the wells listed below will only
be sampled for those constituents which exceeded the GWCLs because the first and third
quarterly events do not include the semi-annual well sampling program. The wells listed below
will be sampled for all constituents listed in the GWDP during the second and fourth quarter
events as that is the regularly scheduled sampling for the semi-annual wells.
• Field pH in MW-27 was slightly below the GWCL in the Q3 sampling event in August
2011.
If you have any questions or require ciny further information, please contact the undersigned.
Yours truly,
Jo Ann Tischler
Director, Compliance and Permitting
cc: David Frydenlund
Ron Hochstein
Ryan Palmer
Harold Roberts
David Turk
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MW-14
(Class 111)
MW-25 (Class
III)
MW-26
(Class 111)
MW-30
(Class 11)
MW-31
(Class 111)
MW-35
(Class 11)
MW-2
(Class III)
MW-3
(Class 111)
MW-3A
(Class III)
MW-5
(Class II)
MW-12
(Class 111)
MW-18
(Class 111)
Field pH (S.U.)
Field pH (S.U.)
Uranium
Nitrate -i- Nitrite (as N)
(mg/L)
Uranium (ug/L)
Chloroform (ug/L)
Chloride (mg/L)
Field pH (S.U.)
Dichloromethane
(Methylene Chloride)
TDS (mg/L)
Gross Alpha minus Rn
& U (pCi/L)
Nitrate -i- Nitrite (as N)
(mg/L)
Chloride (mg/L)
Field pH (S.U.)
Selenium (ug/L)
Nitrate -i- Nitrite (as N)
(mg/L)
TDS (mg/L)
Chloride (mg/L)
Field pH (S.U.)
Sulfate (mg/L)
Manganese (ug/L)
Thallium (ug/1)
Gross Alpha minus Rn
& U (pCi/L)
Uranium (ug/L)
Gross Alpha minus Rn
& U (pCi/L)
Selenium (ug/L)
Field pH (S.U.)
Fluoride (Mg/L)
Field pH (S.U.)
Sulfate (mg/L)
TDS (mg/L)
Selenium (ug/L)
Uranium (ug/L)
Field pH (S.U.)
Selenium (ug/L)
Thallium (ug/1)
Sulfate (mg/L)
Field pH (S.U.)
TDS (mg/L)
6.5 - 8.5
6.5-8.5
6.5
0.62
41.8
70
58.31
6.74 - 8.5
3284.19
4.69
2.5
128
6.5-8.5
34
1320
143
6.5 - 8.5
532
200
0.5
3.75
7.5
3.2
2/2/10
2/26/2010
2/2/10
2/9/10
2/9/10
NS
6.45
6.53
5.93
1.3
58.7
700
72
6.59
3100
2.4
16.1
127
6.81
32
27.7
1150
128
6.96
507
NS
NS
37
6.5-8.5
0.68
6.5-8.5
3640
5805
7.5
6.5-8.5
25
1.95
1938.9
6.25-8.5
3198.77
NS
NS
"NS"
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NA
NA
NA
NA
NA
4/21/10
4/28/2010
4/22/1G
4/27/10
4/20/10
NS
NS
NS
NS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
5/3/10
5/4/10
4/26/10
4/27/10
5/4/10
Table 1 - GWCL Exceedances for Third Quarter 2011 under the
6.29
7.2
6.43
66.7
1700
57
7.18
9.9
3280
0.6
75.*
97
6.55
35.3
22.5
1220
128
7.38
522
NA
NA
NA
NA
1.2
5/21/10
NS
NS
5/21/10
5/21/10
5/21/10
NS
NS
5/21/10
NS
NS
NS
NS
37.2
6.14 (6.25)
0.71
6.23 (6.24)
3680
5860
81.4
0.39
7.16
25.7
3.73
1950
6.2
3280
NS
NS _
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
6.36
NA
0.3
37.4
800
80
6.36
NR
NS
NS
77
NS
6.62
NS
23
NA
NA
6.95
NA
NA
NA
NA
NA
NA
6/16/10
NS
NS
6/16/10
6/15/10
6/15/10
NS
NS
6/15/10
NS
NS
NS
NS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
"NS"
6.45
NA
NA
0.4
36.6
940
47
6.98
2.2
NS
NS
75.3
NS
7.47
NS
27.7
NA
NA
7.01
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
7/20/10
NS
NS
7/21/10
7/21/10
NS
7/21/2010
7/27/10
7/21/10
NS
NS
7/21/10
NS
NS
NS
NS
NS
NS
7.19
NA
NA
0.6
34.4
900
52
6.45
12
NS
NS
16
NS
6.82
33.5
20
NA
NA
7.8
NA
NA
NA
NA
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
8/25/10 6.48 9/8/10 6.51 10/20/10 6.60 11/10/10
NS NA 9/8/2010
NS
8/16/10
NA
0.6
71.8
2800
49
6.39
24
NS
NS
9/26/10
6.58
6.57
0.7
72.7
2100
64
6.60
45
3440^
2.5
8/24/10 16
NS NS
8/24/10 6.73
8/24/10
8/24/10
35.6
22
NS NA
NS NA
9/14/10
9/13/10
8/24/10 7.1
NA
NA NS
75
111
6.80
32.6
27
7330
139
7.66
527
NA
NS NA NS NA
NS NA NS NA
NS
NS
NA
NA
NS
NS
NA
NA
NS NA
NS NA
NS NA
NS NA
NS NA
NS NA
9/20/10
9/21/10
NS
NS
NS
NA
NA
NA
NS NA
NS
9/20/10
35.5
6.39
0.63
6.42
3630
5470
NS
NA
6.62
37.9
NS
NS
10/20/10
10/19/10
10/19/10
NS
NS
10/19/10
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
"NT
NS
NA
NA
0.4
37.5
1000
: 52
6.61
5.5
NS
NS
75
NS
6.77
32.4
'^20
NA
NA
6.92
NA
NA
NA
.NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
11/10/10
11/15/10
11/9/10
11/9/10
11/30/10
11/19/10
11/22/10
11/11/10
11/19/10
6.37
6.36
5.89
0.2
30.4
1900
48
6.49
16
3140
6.4
15
126
6.75
32.2
20
1320
138
6.98
53P
698 ''^
1.14'
2.6
27.2 '
3.5
38.8
6.35
0.77
6.21
3850
5330
94.8
11.6
6.47
27.6
NS NA
NS NA 9/15/10
NS
NS
NA
NA
3.64
1930
7.23
3190
NS
"NS"
NS
"NS"
NA
NA
NA
NA
11/18/10
3.57
1910
6.37
3030
12/15/10
NS
NS
12/15/10
12/14/10
12/14/10
NS
NS
NS
NS
NS
~
NS
NS
NS
NS
NS
NS
NS
~
NS
NS
"NS"
NS
NS
6.47
NA
NA
0.4
29.6
1400
52
6.45
1.2
NS
NS
16
NS
6.65
30.5
20
NS
NS
6.95
NS
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
MW-19
(Class 111) Field pH (S.U.) 6.78-8.5 NS NA 5/4/10 6.61 (6.66) NS NA NS NA NS NA NS NA 9/15/10 6.93 NS NA 11/18/10 6.8 NS NA
MW-23
(Class m) Field pH (S.U.) 6.5-8.5 NS NA 4/22/10 6.18 NS NA NS NA NS NA NS NA 9/14/10 7.05 NS NA 11/22/10 6.44 NS NA
MW-24
(Class 111)
Cadmium (ug/L) 2.5 NS NA 4.28 NS NA NS NA NS NA NS NA 5.06 NS NA 3.22
Thallium (ug/L) 1 NS NA 5/6/10 7.3 NS NA NS NA NS NA NS NA 9/21/10 7.57 NS NA 11/17/10 1.09
Field pH (S.U.) 6.5-8.5 NS NA 5.97 (5.7*) NS NA NS NA NS NA NS NA 6.64 NS NA 6.1
NS
NS
NS
NA
NA
NA
Nitrate -i- Nitrite (as N)
(mg/L) 5.6 NS NA 5.« NS NA NS NA NS NA NS NA 5.9 NS NA 5.7
MW-27
(Class III)
Chloride (mg/L) 38 NS NA 42 NS NA NS NA NS NA NS NA 42 NS NA 45
Sulfate (mg/L) 462 NS NA
Field pH (S.U.) 6.5-8.5 NS NA 5/3/10 469 NS NA NS NA NS NA NS NA
6.78 NS NA NS NA NS NA NS NA 9/14/10 461 NS NA
7.68 NS NA 11/12/10 452
6.89
TDS (mg/L) 1075 NS NA 7760 NS NA NS NA NS NA NS NA 1060 NS NA 7770
Gross Alpha minus Rn
8c U (pCi/L) NS NA 1.6 NS NA NS NA NS NA NS NA NA NS NA 2.4
NS
NS
NS
NS
NS
NS
NA
NA
NA
NA
NA
NA
MW-28
(Class 111)
Chloride (mg/L) 105 NS NA
Field pH (S.U.) 6.1 -8.5 NS NA 4/19/10 70« NS NA NS NA NS NA NS NA
5.67 NS NA NS NA NS NA NS NA 9/14/10 106 NS NA
5.91 NS NA 11/12/10 707
5.72
NS
NS
NA
NA
MW-29
(Class III)
Iron (ug/L) 1869 NS NA
Field pH (S.U.) 6.46 - 8.5 NS NA 4/27/10 1630 NS NA NS NA NS NA NS NA
6.82 NS NA NS NA NS NA NS NA NS NA NS NA
NS NA 11/9/10 1490
6.77
NS
NS
NA
NA
MW-32
(Class III)
Gross Alpha minus Rn
8i. U (pCi/L) 3.33 NS NA 5.4 NS NA NS NA NS NA NS NA 2.9 NS NA 8.8
4/20/10 9/13/10 11/10/10
Field pH (S.U.) 6.4 - 8.5 NS NA 6.03 NS NA NS NA NS NA NS NA 6.33 NS NA 6.05
NS
NS
NA
NA
Notes:
GWCL values are taken from February 15, 2011 version of GWDP.
NS = Not Required and Not Sampled
NR = Required and Not Reported
NA = Not Applicable
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.
' The revised permit dated February 15, 2011 was received after the Exceedance Notice for was submitted on Febriiary 14, 2011. It is reported as an exceedance in this notice, but was not reported in Q4 2010.
Table 1 - GWCL Exceedances for Third Quarter 2011 under the July 14, 2011 GWDP
jfr-?^.*^^^':i#t^^V,J^rci2^2011 Results. •^^V-??^^^?.^ ^^^I'TQ. « ^^tj^ ^^.f i 5fjQ3 2011'Resulfsi;^.-- ^^T" «J a%
Monitoring«r 'Gdn&tituent Exceeding;^
" 1.' ^' *"V wri "Z" > •
''GW.CL int
rjuly 1^,
,v;Januanr.n
i?:520ir>
Monthly,^
i<ivSampiei,'4
January
^Monthlyt
prSamiyets
SampIeV Quoii;
»vResultr^
-f "f,t
^iiMarphi'.-i
'Klonthiy ^
^f'Sal&iW^i
"March"*
1.^2011"'^
^Monthly a
^^«uTr^
j:,92j2om?.
V'Sample'
V- I -
^Q2 20lC
Resfilt 4
.May 2011'
SKlonthly'^
:^ - 'J f
,May.2011
^^Monthly.
^•ih'Result
June'2011 V f'S^ ^Monthly-*
^*.Sample'.Ji
:-'"^Date'#
^«^> nr^
?June 20115
Monthly„^
?V Result'*'
r.Jfi'poii';
.i.Monthiyf^:
$^ Sample Date^
f?Julfe2011^:
Monthly^Resuft
vn3 20ll'i:
u^SampJe^"
VbatCs^
, '
Iw f r
.Q3,2011
Result
.TSe]pteSiber>
^^^ll?Jq
l^Mbnthly^
-^Sample't^;
rjsSepteinbel^*
: ^2oiip
Monthly.^ -
>/R&ult#
&.•>••.» '"Sample .j \
„ Frequency^V "
* T ^ w If. » 5
MW-11 (Class
II)
Manganese (ug/L) 131.29 1/11/11 121 2/2/11 145 3/15/11 68 4/4/2011 148 5/10/2011 770 6/15/2011 121 It mon 757 8/3/2011
8/30/11
118 9/7/2011 106 Quarterly MW-11 (Class
II) Tetrahydrofuran (ug/L) 11.5 1/11/11 <1.0 2/2/11 <L0 3/15/11 <1.0 4/4/2011 <1.0 5/10/2011 <1.0 6/20/2011 <1.0 It mon <1.0
8/3/2011
8/30/11 <1.0 9/7/2011 <1.0 Quarterly
MW-14 (Class
III) Field pH (S.U.) 6.5-8.5 1/11/11 6.37 2/7/11 6.22 3/14/11 6.76 4/4/2011 6.63 5/10/2011 6.37 6/15/2011 5.«3 7/5/2011 6.4 8/3/2011 6.23
(6.41) 9/8/2011 6.50 Quarterly
MW-25 (Class III) Field pH (S.U.) 6.5-8.5 1/11/11 6.44 2/2/11 6.66 3/15/11 6.79 4/4/2011 6.7 5/11/2011 6.7 6/20/2011 5.77 7/6/2011 6.29 8/3/2011
8/30/11
6.42
(6.54) 9/7/2011 6.54 Quarterly MW-25 (Class III)
Uranium 6.5
1/11/11
7.02
2/2/11
4.77
3/15/11
6.8
4/4/2011
5.56
5/11/2011
6.72
6/20/2011
7.06
7/6/2011
6.74 8/3/2011 6.37
9/7/2011
5.96 Quarterly
MW-26 (Class
111)
Nitrate + Nitrite (as N)
(mg/L) 0.62
1/12/11
0.2
2/16/11
0.25
3/15/11
0.6
4/1/2011
0.8
5/10/2011
0.4
6/20/2011
0.3
7/6/2011
0.9
8/3/2011
8/30/11
0.6
9/7/2011
2.4 Quarterly
MW-26 (Class
111)
Uranium (ug/L) 41.8
1/12/11
32
2/16/11
69.3
3/15/11
31.8
4/1/2011
60.2
5/10/2011
57.4
6/20/2011
18.5
7/6/2011
57.7
8/3/2011
8/30/11
19.0
9/7/2011
56.7 Quarterly
MW-26 (Class
111)
Chloroform (ug/L) 70
1/12/11
800
2/16/11
730
3/15/11
7200
4/1/2011
390
5/10/2011
7900
6/20/2011
730
7/6/2011
300
8/3/2011
8/30/11
7000
9/7/2011
7300 Quarterly
MW-26 (Class
111)
Chloride (mg/L) 58.31
1/12/11
52
2/16/11
59
3/15/11
64
4/1/2011
64
5/10/2011
54
6/20/2011
39
7/6/2011
64
8/3/2011
8/30/11
60
9/7/2011
66 Quarterly
MW-26 (Class
111)
Field pH (S.U.) 6.74 - 8.5 1/12/11 6.83 2/16/11 6.06 3/15/11 6.89 4/1/2011 6.22 5/10/2011 6.43 6/20/2011 6.52 7/6/2011 6.35 8/3/2011
8/30/11
6.07
r6.5*) 9/7/2011 6.77 Quarteriy MW-26 (Class
111) Dichloromethane
(Methylene Chloride)
(ug/L)
5
1/12/11
<1.0
2/16/11
70
3/15/11
74
4/1/2011
3.1
5/10/2011
20
6/20/2011
7
7/6/2011
2.4
8/3/2011
8/30/11
70
9/7/2011
7.9 Quarteriy
MW-26 (Class
111)
TDS (mg/L) 3284.19
1/12/11
3100
2/16/11
3270
3/15/11
3140
4/1/2011
3370
5/10/2011
3140
6/20/2011
3020
7/6/2011
3270
8/3/2011
8/30/11
3190
9/7/2011
3200 Quarterly
MW-26 (Class
111)
Gross Alpha minus Rn &
U (pCi/L) 4.69
1/12/11
NS
2/16/11
3
3/15/11
2.7
4/1/2011
3.3
5/10/2011
3.9
6/20/2011
4.3
7/6/2011
2.8
8/3/2011
8/30/11
2.7
9/7/2011
2.5 Quarterly
MW-30 (Class
II)
Nitrate -i- Nitrite (as N)
(mg/L) 2.5
1/10/11
75
2/1/11
76
3/14/11
77
4/11/2011
76
5/10/2011
76
6/20/2011
77
7/5/2011
77
8/3/2011
74
9/7/2011
' 76 Quarterly
MW-30 (Class
II) Chloride (mg/L) 128 1/10/11 NS 2/1/11 134 3/14/11 NS 4/11/2011 734 5/10/2011 128 6/20/2011 127 7/5/2011 127 8/3/2011 126 9/7/2011 745 Quarterly MW-30 (Class
II) Field pH (S.U.) 6.5-8.5
1/10/11
6.65
2/1/11
6.96
3/14/11
7.10
4/11/2011
6.83
5/10/2011
6.7
6/20/2011
5.66
7/5/2011
6.65
8/3/2011
6.61
9/7/2011
6.80 Quarterly
MW-30 (Class
II)
Selenium (ug/L) 34
1/10/11
36.2
2/1/11
34.7
3/14/11
34
4/11/2011
44.4
5/10/2011
3«.3
6/20/2011
3«.7
7/5/2011
32.4
8/3/2011
39.7
9/7/2011
32.4 Quarterly
MW-31 (Class
111)
Nitrate -i- Nitrite (as N)
(mg/L) 5
1/10/11
19
2/1/11
27
3/14/11
22
4/1/2011
27
5/10/2011
20
6/20/2011
22
7/5/2011
22
8/2/2011
20
9/6/2011
27 Quarterly
MW-31 (Class
111)
TDS (mg/L) 1320 1/10/11 1240 2/1/11 1220 3/14/11 1250 4/1/2011 7370 5/10/2011 1290 6/20/2011 7330 7/5/2011 1280 8/2/2011 1300 9/6/2011 1300 Quarterly MW-31 (Class
111) Chloride (mg/L) 143 1/10/11 NS . 2/1/11 745 3/14/11 NS 4/1/2011 143 5/10/2011 143 6/20/2011 745 7/5/2011 74* 8/2/2011 148 9/6/2011 74« Quarterly
MW-31 (Class
111)
Field pH (S.U.) 6.5-8.5
1/10/11
6.65
2/1/11
7.21
3/14/11
7.43
4/1/2011
7.01
5/10/2011
6.73
6/20/2011
6.76
7/5/2011
6.64
8/2/2011
6.67
9/6/2011
7.03 Quarterly
MW-31 (Class
111)
Sulfate (mg/L) 532
1/10/11
NS
2/1/11
53*
3/14/11
531
4/1/2011
503
5/10/2011
512
6/20/2011
540
7/5/2011
532
8/2/2011
537
9/6/2011
547 Quarterly
MW-35 (Class
II)
Manganese (ug/L) 200 NS NA
2/15/11
248 NS NA
6/7/2011
369 NS NA NS NA
7/20/11
348
8/2/2011
=267—
9/7/11
' -270 Quarterly
MW-35 (Class
II)
Thallium (ug/1) 0.5 NS NA
2/15/11
<0.50 NS
NS
NA
NA 6/7/2011
<0.50 NS NA NS NA
7/20/11
NS
8/2/2011
0.52
9/7/11
NS Quarterly MW-35 (Class
II) Gross Alpha minus Rn &
U (pCi/L) 3.75 NS NA 2/15/11 2.6
NS
NS
NA
NA 6/7/2011
3.7 NS NA NS NA 7/20/11 NS' 8/2/2011 4.5 9/7/11 . NS Quarterly
MW-35 (Class
II)
Uranium (ug/L) 7.5 NS NA
2/15/11
72.7 NS NA
6/7/2011
21.7 NS NA NS NA
7/20/11
24.2
8/2/2011
7*.3
9/7/11
! 22.3 Quarterly
^^^Re'ifuiraBjSem^
MW-2 (Class
III)
Gross Alpha minus Rn &
U (pCi/L) 3.2 NS NA 1.1 NS NA 4/12/2011 1.2 NS NA NS NA NS NA 8/8/2011 0.5 NS NA Semi-Annually
MW-3 (Class
III)
Selenium (ug/L) 37 NS NA
2/15/11
40.5 NS NA
4/13/2011
45.4 NS NA NS NA NS NA
8/10/2011
46 NS NA Semi-Annually MW-3 (Class
III) Field pH (S.U.) 6.5-8.5 NS NA 2/15/11 6.09 NS NA 4/13/2011 6.46 NS NA NS NA NS NA 8/10/2011 6.32 NS NA Semi-Annually
MW-3 (Class
III)
Ruoride (Mg/L) 0.68 NS NA
2/15/11
0.69 NS NA
4/13/2011
0.68 NS NA NS NA NS NA
8/10/2011
0.96 NS NA Semi-Annually
MW-3A (Class
111)
Field pH (S.U.) 6.5-8.5 NS NA
2/16/11
6.05 NS NA
4/13/2011
6.58 NS NA NS NA NS NA
8/11/2011
6.19 NS NA Semi-Annually MW-3A (Class
111) Sulfate (mg/L) 3640 NS NA 2/16/11 3730 NS NA 4/13/2011 3350 NS NA NS NA NS NA 8/11/2011 3560 NS NA Semi-Annually MW-3A (Class
111) TDS (mg/L) 5805 NS NA 2/16/11 5770 NS NA 4/13/2011 5720 NS NA NS NA NS NA 8/11/2011 5810 NS NA Semi-Annually
MW-3A (Class
111)
Selenium (ug/L) 89 NS NA
2/16/11
99 NS NA
4/13/2011
85.8 NS NA NS NA NS NA
8/11/2011
88.5 NS NA Semi-Annually
MW-5 (Class II) Uranium (ug/L) 7.5 NS NA 2/14/11 29.5 NS NA 4/12/2011 7.16 NS NA NS NA NS NA 8/9/2011 0.5 NS NA Semi-Annually
MW-12 (Class
III)
Field pH (S.U.) 6.5 - 8.5 NS NA 2/15/11 6.43 NS NA 4/5/2011 6.67 NS NA NS NA NS NA 8/9/2011 6.73 NS NA Semi-Annually MW-12 (Class
III) Selenium (ug/L) 25 NS NA 2/15/11 39 NS NA 4/5/2011 21.7 NS NA NS NA NS NA 8/9/2011 25.4 NS NA Semi-Annually
MW-18 (Class
III)
Thallium (ug/1) 1.95 NS NA
2/15/11
3.49 NS NA
4/6/2011
3.74 NS NA NS NA NS NA
8/10/2011
9/21/11
4.0
3.39 NS NA Semi-Annually
MW-18 (Class
III) Sulfate (mg/L) 1938.9 NS NA 2/15/11 1770 NS NA 4/6/2011 1780 NS NA NS NA NS NA 8/10/2011
9/21/11
1910 NS NA Semi-Annually MW-18 (Class
III)
Field pH (S.U.) 6.25-8.5 NS NA
2/15/11
6.27 NS NA
4/6/2011
6.71 NS NA NS NA NS NA
8/10/2011
9/21/11 5.95
(6.30; NS NA Semi-Annually
MW-18 (Class
III)
TDS (mg/L) 3198.77 NS NA
2/15/11
3250 NS NA
4/6/2011
3250 NS NA NS NA NS NA
8/10/2011
9/21/11
3190 NS NA Semi-Annually
«^ S:^ .'•x^*^ "^kL,^^""'r,Q.l-ZOltResuits J'tj^' ?i^>, ^-^^^^\r*,7: f V't'-^-a*" J!?'_'v'y-> ^ .-S* Q22011 Results'" -v^ l^-^™? >'>-<'-^'*'C'f^j.'i^'*'-^'i'-^*. ~''^* '-.^.'i ^" - > Wr, ,Q3'2011fResulfsp ^'•'''^r' %t^^''^\
ii-f^omtonngK ?
iweli'cJWafeiCl
.i«\Cl^ss)'-f-,
i'.(3onstituent;Exceeding;> ^,GWGL in"
CCurrentX
"Jaiuiary ^
'::2oii;f
iMonthlyn
^'^ Sample;;;
**?"2011^^"'.
^Monthly'??:
.•i,> Sample y/i
•^RfViilti*'''
^01.2011*:;
Sample V
» •",•> ^% PfS"-
•JL"' 5
IQI 2011-
.JResult, .
- ^MafclT'"
r Sample-^
< *^Marcfi*t
^Monthly.
? Result; /
"iL Sampley
,vDatet~<^
.Q2 20!.r.;
-^Results:;
•VJ ' .^'^
Mav20ir
"Monthly -
,/Sampie.
5,May-201i:
/Monthly
-r Result ,
"June 2011
r,Monthl^
i SampleT
rvDate*/.
7une,2011.
'Monthly
ResultH
r'-juiyioiifc
'SamplVOate'f
^^July2011 ^•
Monthly-^Result
LJ^
$Q3 2011 *
^wSampIe'*
Datel-"""^'
^ -1 ' #
•V
Q3 2011-
"Result"^
1
Septe-nbf^lfSePe^l^e;^
-a".2011 s-^r' Mmi^^--
^.•i^twyiht'^M^itMy.r
ffSample- 1 'RJ^I/,.;
"•'^-sffSample'l^^
'"'Frequency"'^
off^l-C .fi'^.^ ^'s-.'i.si'* , ,~i.v^-,C^i^5Required.'Semi-AnnuaISampling.Wel^^ "S - S- f ^ \'j.:''. ^'2*"^^ V lr^>'~ "V-iht^ ^'
MW-19 (Class
III) Field pH (S.U.) 6.78-8.5 NS NA 2/21/2011 6.78 NS NA 4/5/2011 7.03 NS NA NS NA NS NA 7/20/3011 6.65 NS NA Semi-Annually
MW-23 (Class
III) Field pH (S.U.) 6.5-8.5 NS NA 2/9/2011 6.73 NS NA 4/5/2011 7.14 NS NA NS NA NS NA 8/4/2011 6.3* NS NA Semi-Annually
MW-24 (Class
111)
Cadmium (ug/L) 2.5 NS NA
2/10/2011
2.7« NS NA
4/5/2011
2.67 NS NA • NS NA NS NA
8/4/2011
1.46 NS. NA Semi-Annually MW-24 (Class
111) Thallium (ug/L) 1 . NS NA 2/10/2011 1.42 NS NA 4/5/2011 7.07 NS NA NS NA NS NA 8/4/2011 ND NS NA Semi-Annually
MW-24 (Class
111)
Field pH (S.U.) 6.5-8.5 NS NA
2/10/2011
5.73 NS . NA
4/5/2011
6.72 NS NA NS NA NS NA
8/4/2011
6.45 NS NA Semi-Annually
MW-27 (Class
III)
Nitrate -i- Nitrite (as N)
(mg/L). 5.6 NS NA
2/9/2011
6 NS NA
4/5/2011
6.4 NS NA . NS NA NS NA
8/8/2011
6 NS NA Semi-Annually
MW-27 (Class
III)
Chloride (mg/L) 38 NS NA
2/9/2011
46 NS NA
4/5/2011
43 NS NA NS NA NS NA
8/8/2011
43 NS NA Semi-Annually MW-27 (Class
III) Sulfate (mg/L) 462 NS NA 2/9/2011 455 NS NA 4/5/2011 442 NS NA NS NA NS NA 8/8/2011 424 NS NA Semi-Annually MW-27 (Class
III) Field pH (S.U.) 6.5-8.5 NS NA 2/9/2011 6.71 NS NA 4/5/2011 6.79 NS . NA NS NA NS NA 8/8/2011 6.39 NS NA Semi-Annually
MW-27 (Class
III)
TDS (mg/L) 1075 NS NA
2/9/2011
7090 NS NA
4/5/2011
7790 NS NA NS NA NS NA
8/8/2011
7090 NS NA Semi-Annually
MW-27 (Class
III)
Gross Alpha minus Rn &
u (pcyu) 2 NS NA
2/9/2011
0.7 NS NA
4/5/2011
1.1 NS NA NS NA NS NA
8/8/2011
0.8 NS NA Semi-Annually
MW-28 (Class
III)
Chloride (mg/L) 105 NS NA 2/14/2011 774 NS NA 4/11/2011 709 NS NA NS NA NS NA 8/8/2011 105 NS NA Semi-Annually MW-28 (Class
III) Field pH (S.U.) 6.1-8.5 NS NA 2/14/2011 5.69 NS NA 4/11/2011 6.07 NS NA NS NA NS NA 8/8/2011 5.7« NS NA Semi-Annually
MW-29 (Class
III)
Iron (ug/L) 1869 NS NA NS NA NS NA 4/18/2011 3070 NS NA NS NA NS. NA 8/9/2011 1080 NS NA Semi-Annually MW-29 (Class
III) Field pH (S.U.) 6.46 - 8.5 NS NA NS NA NS NA 4/18/2011 6.45 NS NA NS NA NS NA 8/9/2011 -^6:20-NS NA Semi-Annually
MW-32 (Class
HI)
Gross Alpha minus Rn &
U (pCi/L) 3.33 NS NA
2/9/2011
1.5 NS NA
4/1/2011
4.6 NS NA NS NA NS NA 8/2/2011
8/30/11
1.9 NS NA Semi-Annually MW-32 (Class
HI) Field pH (S.U.) 6.4-8.5 NS NA
2/9/2011
5.99 NS NA
4/1/2011
6.74 NS. NA NS NA NS NA
8/2/2011
8/30/11 6.70
(6.20) NS NA Semi-Annually
Notes:
GWCL values are taken from July 14, 2011 version of GWDP.
NS = Not Required and Not Sampled
NR = Required and Not Reported
NA = Not Applicable
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.