DRC-2012-001699 - 0901a068802f7a6f

012-00 1699
Denison Mines (USA) Corp
105017th Street, Suite 950
Denver, CO 80265
USA
Tel [phone]
Fax [phone]
www denisonmines com
DENISO
MINES
July 27, 2012
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 second quarter ("Q2") groundwater monitoring
during the period from April 1, to June 30, 2012 under the July 14, 2011 version of the Mill's
Groundwater Discharge Penrnt (the "GWDP") All analytical data needed for comparison to the
GWCLs were received during the period ending July 18, 2012
Pursuant to Part IG 1 a) of the GWDP, (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 this 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 IG 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 ensure 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 Q2 2012 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 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 Apnl 27 and May 2,
2011 Based on the assessments noted below relating to the Q2 exceedances, a plan and
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schedule for the Q2 2012 exceedances will not be required for the following reasons A Plan and
Time Schedule will not be prepared for monitoring wells with two successive exceedances in Q2
2012 if successive exceedances were reported in a previous quarter and were included in the
Plans and Schedules subnutted June 13, 2011, September 7, 2011 and amended April 13, 2012
A Plan and Time Schedule will not be submitted because the assessment processes and schedule
have not changed since these previous subnussions Additionally, a Plan and Time Schedule will
not be prepared for successive exceedances of nitrate + nitrite, chloride, chloroform, methylene
chloride and pH because these constituents have been the subject of ongoing investigations at the
Mill as discussed below
Under the July 14, 2011 revision of the GWDP, GWCLs have been detemuned 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 + nitrite and chloride in groundwater Denison
submitted a Corrective Action Plan ("CAP") for nitrate + nitrite and chloride in
groundwater The CAP is currently undergoing a public comment period 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 + 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 geochenucal consultant, INTERA, Inc , Denison compared the Mill's
most recent groundwater pH data from the Q2 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 Q2, were already outside the revised GWCLs that
were to be proposed in the June 30, 2011 letter By the letter dated June 30, 2011,
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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 Pursuant to teleconferences with DRC on
December 5, and December 19, 2011, Denison submitted the Work Plan and Schedule on
January 20, 2012 and a revised plan based on DRC comments on April 13, 2012 The
Work Plan and Time Schedule was approved by DRC Based on the approved Work Plan
and Time Schedule, Denison and DRC entered into a Stipulated Consent Agreement
("SCA") dated July 12, 2012 Due to the current commitment and on-going study to
evaluate site field pH conditions in the SCA, 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 in Q2 2012 However, the 30-day plan and
schedule contemplated in Part IG 1 c) of the GWDP will not be required for these particular
consecutive exceedances which occurred in Q2 of 2012, 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 30-day plans and schedules for those quarters
MW-26
• Nitrate + nitrite concentration exceeded its GWCL in all sampling events during Q2
2012 As mentioned above, nitrate + nitrite concentrations are currently under re-
evaluation, and a plan to address this consecutive exceedance is not necessary and is not
being submitted
• Chloroform in MW-26 has exceeded its GWCL for all of the monitoring periods for Q2
2012 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 all of the monitoring periods for Q2
2012 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) m 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 vanation over time as a result of the pumping activity This will be taken into
account by the Executive Secretary in detenmning compliance for this well" Based on
information provided by UDEQ m teleconferences on April 27, and May 2, 2011, due to the
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current pumping status as part of the chloroform investigation program, the 30-day plan and
schedule for assessment is not required at this time for exceedances of chloroform and methylene
chloride in MW-26
• Chloride concentration exceeded its GWCL in all of the monitoring periods for Q2 2012
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 Q2 2012
and during previous quarters As mentioned above, nitrate + 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 + nitrite concentration exceeded its GWCL in all sampling events during Q2 2012
and during previous quarters As mentioned above, nitrate + nitrite concentrations are
currently under re-evaluation, and a plan to address this consecutive exceedance is not
necessary and is not being subnutted
Chloride concentration exceeded its GWCL in the April monthly and the Q2 (May 2012)
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
TDS concentration exceeded its GWCL in all of the monitoring periods for Q2 2012 As
noted above, a separate Plan and Time Schedule has not been submitted for this
exceedance The successive TDS exceedances reported in Ql 2012 were added to, and
addressed in conjunction, with the sulfate exceedances as described in the June 13, 2011
Plan and Time Schedule The rationale for addressing the TDS and sulfate together is
based on the connection of sulfate to TDS, that is, sulfate is a component of TDS The
time schedule for the assessment of TDS will be the same as that for sulfate
MW-35
Manganese concentration exceeded the GWCL in MW-35 in all of the Q2 sampling
events The consecutive manganese exceedances noted in MW-35 were previously
discussed in the Plan and Time Schedule Under Part IG4 (d), submitted to UDEQ on
September 7, 2011 as revised on April 13, 2012 An additional plan or schedule to
address the Q2 exceedances is not necessary and is not being subnutted because the
assessment processes and schedule have not changed since the September 7, 2011 and
April 13, 2012 submissions 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
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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 Q2 sampling events
The consecutive uranium exceedances noted in MW-35 were previously discussed in the
Plan and Time Schedule Under Part IG4 (d), submitted to UDEQ on September 7, 2011
as revised on April 13, 2012 An additional plan or schedule to address the Q2
exceedances is not necessary and is not being submitted because the assessment
processes and schedule have not changed since the September 7, 2011 and April 13, 2012
submissions 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
• Gross alpha concentration exceeded the GWCL in MW-35 in all of the Q2 sampling
events An additional plan or schedule to address the Q2 exceedances is not necessary
and is not being submitted because the background has not yet been established for MW-
35, and 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
• Thallium concentration exceeded the GWCL in MW-35 in the April monthly and the Q2
(May) sampling events An additional plan or schedule to address the these exceedances
IS not necessary and is not being submitted because the background has not yet been
established for MW-35, and 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 Q2
New exceedances for the Q2 2012 quarterly well sampling program are listed below This
exceedance will result in an accelerated sampling frequency from quarterly to monthly It is
important to note that the well listed below will only be sampled during the monthly events for
those constituents which exceeded the GWCLs The well 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
• Manganese in MW-14 exceeded the GWCL in the May (Q2) sampling event
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Relative to accelerated reporting requirements, based on phone conversations with UDEQ on
April 5, 2010, that reporting of exceedances is required to be completed within 30 days of receipt
of the last data package for a quarterly monitoring event Similarly, accelerated monitoring is
required to commence the month following the submission of the Exceedance Notice for a
specified quarter for wells that are being accelerated from quarterly to monthly and the quarter
following the submission of the Exceedance Notice for wells that are being accelerated from
senuannually to quarterly Per teleconferences with UDEQ, Denison proposed modified
language for the GWDP, Part 1 G 1 on May 25, 2012, to document DRC concurrence with the
accelerated reporting and monitoring agreements resulting from the April 5, 2012 teleconference
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 (Ql and Q2)
MW-3
Selenium has exceeded the GWCL for both the Ql sampling event and the Q2 sampling
event The consecutive selenium exceedances noted in MW-3 were previously discussed
in the Plan and Time Schedule Under Part 104 (d), submitted to UDEQ on June 13,
2011 as revised on April 13, 2012 An additional plan or schedule to address the Q2
exceedances is not necessary and is not being subnutted because the assessment
processes and schedule have not changed since the June 13, 2011 and April 13, 2012
submissions
Fluoride has exceeded the GWCL for both the Q1 sampling event and the Q2 sampling
event The consecutive selenium exceedances noted in MW-3 were previously discussed
in the Plan and Time Schedule Under Part 104 (d), subnutted to UDEQ on June 13,
2011 as revised on April 13, 2012 An additional plan or schedule to address the Q2
exceedances is not necessary and is not being submitted because the assessment
processes and schedule have not changed since the June 13, 2011 and April 13, 2012
submissions
MW-18
Thallium has exceeded the GWCL for both the Ql sampling event and the Q2 sampling
event The consecutive thallium exceedances noted in MW-18 were previously discussed
in the Plan and Time Schedule Under Part 104 (d), submitted to UDEQ on June 13,
2011 as revised on April 13, 2012 An additional plan or schedule to address the Q2
exceedances is not necessary and is not being submitted because the assessment
processes and schedule have not changed since the June 13, 2011 and April 13, 2012
submissions
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• TDS has exceeded the GWCL for both the Ql sampling event and the Q2 sampling
event The consecutive TDS exceedances noted in MW-18 were previously discussed in
the Plan and Time Schedule Under Part 104 (d), subnutted to UDEQ on June 13, 2011
as revised on April 13, 2012 An additional plan or schedule to address the Q2
exceedances is not necessary and is not being submitted because the assessment
processes and schedule have not changed since the June 13, 2011 and April 13, 2012
submissions
MW-19
Nitrate + Nitrite have exceeded the GWCL for both the Ql sampling event and the Q2
sampling event and during previous quarters As mentioned above, nitrate + nitrite
concentrations are currently under re-evaluation, and a plan to address this consecutive
exceedance is not necessary and is not being subnutted
MW-24
Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql
sampling event and the Q2 sampling event As mentioned above, site-wide pH issues and
trends are currently included in a separate study, and a plan and schedule to address this
consecutive exceedance is not necessary and is not being subnutted
MW-27
Nitrate + Nitrite have exceeded the GWCL for both the Ql sampling event and the Q2
sampling event and durmg previous quarters As mentioned above, nitrate + nitrite
concentrations are currently under re-evaluation, and a plan to address this consecutive
exceedance is not necessary and is not being subnutted
Chloride has exceeded the GWCL for both the Ql sampling event and the Q2 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 subnutted
TDS has exceeded the GWCL for both the Ql sampling event and the Q2 sampling
event The consecutive TDS exceedances noted in MW-27 were previously discussed in
the Plan and Time Schedule Under Part 104 (d), subnutted to UDEQ on June 13, 2011
as revised on Apnl 13, 2012 An additional plan or schedule to address the Q2
exceedances is not necessary and is not being submitted because the assessment
processes and schedule have not changed since the June 13, 2011 and April 13, 2012
subnussions
MW-28
Chloride has exceeded the GWCL for both the Ql sampling event and the Q2 sampling
event and during previous quarters As mentioned above, chloride concentrations are
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currently under re-evaluation, and a plan to address this consecutive exceedance is not
necessary and is not being submitted
2.1 Semi-annual Wells with New Exceedances Reported in Q2
New exceedances for the Q2 2012 semi-annual well sampling program are listed below These
exceedances will result in an accelerated sampling frequency from semi-annually to quarterly It
IS important to note that the well listed below will only be sampled during the quarterly events
for those constituents which exceeded the GWCLs The well listed below will be sampled for all
constituents listed m the GWDP during the semi-annual events (Q2 and Q4) as that is the
regularly scheduled sampling for the semi-annual wells
• Selenium in MW-15 exceeded the GWCL in the May (Q2) sampling event
• Manganese in MW-28 exceeded the GWCL in the May (Q2) sampling event
• Manganese in MW-29 exceeded the GWCL in the May (Q2) sampling event
• TDS in MW-29 exceeded the GWCL in the May (Q2) sampling event
If you have any questions or require any further information, please contact the undersigned
Yours truly.
Jo Ann Tischler
Director, Compliance and Pemutting
cc David Frydenlund
Harold Roberts
David Turk
DENISO MINES
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Jiii
Ql 2010 Results Q2 2010 Results 03 2010 Results Q4 2010 Results
Monitonng
WeU (Water
Class)
Constituent Exceeding
GWCL
GWCL m July
14,2011 GWDP
Ql 2010 Sample
Date
Ql 2010
Result
Q2 2010
Sample Date
Q2 2010
Result
May 2010
Monthly
Sample Date
May 2010
Monthly
Result
June 2010
Monthly
Sample Oate
June 2010
Monthly
Result
July 2010
Monthly
Sample Date
July 2010
Monthly
Result
August 2010
Monthly
Sample Date
August 2010
Monthly Result
Q3 2010
Sample Date
Q3 2010
Result
October 2010
Monthly Sample
Date
October 2010
Monthly
Result
Q4 2010
Sample Date
Q4 2010
Result
December 2010
Monthly Sample
Date
December 2010
Monthly Result
Required Quarterly Sampling WeUs
MW-11 (Class
U)
Manganese (ug/L) 131 29 2/10/10 134 4/28/10 137 5/24/10 122 6/16/10 99 7/20/10 123 8/25/10 138 9/8/10 128 141 133
12/15/10
158 MW-11 (Class
U) Tetrahydrofuran (ug/L) 115 2/10/10 12 4/28/10 52 5/24/10 <1 0 6/16/10 <1 0 7/27/10 2 17 8/25/10 <1 0 9/8/10 <1 0 10/20/10 <10 11/11/10 <1 0 12/15/10 <1 0
MW-14 (Class
m)
Manganese (ug/L) 2230 30 2060 2070 NA NA NA NA 1920
10/20/10
NA 1980
12/15/10
NA MW-14 (Class
m) Field pH (S U ) 65-85 2/2/10 6 45 4/21/10 629 5/21/10
6 36
6/16/10
645
7/20/10
7 19
8/25/10
648
9/8/10
651
10/20/10
6 60
11/10/10
6 37
12/15/10
6 47
MW-25 (Class
UI)
Field pH (S U ) 65-85 2/26/2010 6 53 4/28/2010 72 NS NA NS NA NS NA NS NA 9/8/2010 6 58 NS NA 11/10/10 6 36 NS NA MW-25 (Class
UI) Uranium 65 5 93 6 43 NS NA NS NA NS NA NS NA
9/8/2010
6 57 NS NA 5 89 NS NA
MW-26 (Class
III)
Nitfate + Nitrite (as N)
(mgA.) 0 62 13 2 03 04 06 06
9/26/10
07
10/20/10
04
11/15/10
02
12/15/10
04
MW-26 (Class
III)
Uranium (ug/L) 41 8
2/2/10
58 7 66 7 37 4 36 6 34 4 718
9/26/10
72 7
10/20/10
37 5
11/15/10
30 4
12/15/10
29 6
MW-26 (Class
III)
Chloroform (ug/L) 70
2/2/10
700 1700 800 940 900 2800
9/26/10
2100
10/20/10
1000
11/15/10
1900
12/15/10
1400
MW-26 (Class
III)
Chloride (mg/L) 58 31
2/2/10
72 57 80 47 52 49
9/26/10
64
10/20/10
52
11/15/10
48
12/15/10
52
MW-26 (Class
III)
Field pH (S U ) 6 74 - 8 5
2/2/10
6 59
4/22/10
7 18
5/21/10
636
t)/16/10
6 98
7/21/10
6 45
8/16/10
639
9/26/10
6 60
10/20/10
6 61
11/15/10
6 49
12/15/10
6 45 MW-26 (Class
III) Dichloromethane
(Methylene Chloride)
(UgA.)
5
2/2/10
1
4/22/10
99
5/21/10
NR
t)/16/10
22
7/21/10
12
8/16/10
24
9/26/10
45
10/20/10
55
11/15/10
16
12/15/10
1 2
MW-26 (Class
III)
TDS (mg/L) 3284 19
2/2/10
3100
4/22/10
3280
5/21/10
NS
t)/16/10
NS
7/21/10
NS
8/16/10
NS
9/26/10
3440
10/20/10
NS
11/15/10
3140
12/15/10
NS
MW-26 (Class
III)
Gross Alpha minus Rn & U
(pCi/L) 4 69
2/2/10
24
4/22/10
06
5/21/10
NS
t)/16/10
NS
7/21/10
NS
8/16/10
NS
9/26/10
25
10/20/10
NS
11/15/10
64
12/15/10
NS
MW-30 (Class
n)
Nitrate + Nitrite (as N)
(mgA.) 25
2/9/10
161
4/27/10
15 8
5/21/10
17
6/15/10
15 3 7/21/10 16 8/24/10 16
9/14/10
15
10/19/10
IS
11/9/10
15
12/14/10
16
MW-30 (Class
n)
Chlonde (mg/L) 128
2/9/10
127
4/27/10
97
5/21/10
NS
6/15/10
NS NS NS NS NS
9/14/10
111
10/19/10
NS
11/9/10
126
12/14/10
NS MW-30 (Class
n) Field pH (S U ) 65-85 2/9/10 681 4/27/10 6 55 5/21/10 6 62 6/15/10 7 47 7/21/2010 6 82 8/24/10 6 73 9/14/10 6 80 10/19/10 6 77 11/9/10 6 75 12/14/10 6 65
MW-30 (Class
n)
Uranium (ug/L) 8 32
2/9/10
6 82
4/27/10
6 82
5/21/10
NS
6/15/10
NS NS NS NS NS
9/14/10
7 10
10/19/10
NS
11/9/10
6 64
12/14/10
NS
MW-30 (Class
n)
Selenium (ug/L) 34
2/9/10
32
4/27/10
35 J
5/21/10
NS
6/15/10
NS 7/27/10 33 5 8/24/10 35 6
9/14/10
32 6
10/19/10
32 4
11/9/10
32 2
12/14/10
30 5
MW-31 (Class
in)
Nitrate + Nitrite (as N)
(mgA,) 5
2/9/10
21 7
4/20/10
22 5 5/21/10 23 6/15/10 21 1 7/21/10 20 8/24/10 22
9/13/10
21 10/19/10 20
11/9/10
20
12/14/10
20
MW-31 (Class
in)
TDS (mg/L) 1320
2/9/10
1150
4/20/10
1220 NS NA NS NA NS NA NS NA
9/13/10
1330 NS NA
11/9/10
1320
12/14/10
NS MW-31 (Class
in) Chloride (mg/L) 143 2/9/10 128 4/20/10 128 NS NA NS NA NS NA NS NA 9/13/10 139 NS NA 11/9/10 138 12/14/10 NS MW-31 (Class
in)
Field pH (S U ) 65-85
2/9/10
6 96
4/20/10
7 38 5/21/10 6 95 6/15/10 701 7/21/10 78 8/24/10 7 1
9/13/10
7 66 10/19/10 6 92
11/9/10
6 98
12/14/10
6 95
MW-31 (Class
in)
Sulfate (mg/L) 532
2/9/10
507
4/20/10
522 NS NA NS NA NS NA NS NA
9/13/10
527 NS NA
11/9/10
539
12/14/10
NS
MW-35 (Class
n)
Manganese (ug/L) 200 NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA
11/30/10
698 NS NA
MW-35 (Class
n)
Thalbum (ug/l) 05 NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA
11/30/10
1 14 NS NA
MW-35 (Class
n)
Gross Alpha minus Rn & U
(pCiA.) 3 75 NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA 11/30/10 26 NS NA MW-35 (Class
n)
Selenium (ug/L) 125 NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA
11/30/10
ND NS NA
MW-35 (Class
n)
Uranium (ug/L) 75 NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA
11/30/10
272 NS NA
Required Semi-Annual Sampbng Wells
MW-2 (Class
m)
Gross Alpha minus Rn & U
(oCi/L) 32 NS NA 1 2 NS NA NS NA NS NA NS NA NS NA NS NA 35 NS NA
MW-3 (Class
UI)
Selenium (ug/L) 37 NS NA
5/3/10
372 NS NA NS NA NS NA NS NA
9/20/10
35 5 NS NA
11/19/10
38 8 NS NA MW-3 (Class
UI) Field pH (S U ) 65-85 NS NA 5/3/10 6 14(625) NS NA NS NA NS NA NS NA 9/20/10 6 39 NS NA 11/19/10 6 35 NS NA
MW-3 (Class
UI)
Fluoride (Mg/L) 0 68 NS NA
5/3/10
0 71 NS NA NS NA NS NA NS NA
9/20/10
0 63 NS NA
11/19/10
0 77 NS NA
MW-3A (Class
no
Field pH (S U ) 65-85 NS NA
5/4/10
6 23(624) NS NA NS NA NS NA NS NA
9/21/10
6 42 NS NA
11/22/10
621 NS NA MW-3A (Class
no Sulfate (mg/L) 3640 NS NA 5/4/10 3680 NS NA NS NA NS NA NS NA 9/21/10 3630 NS NA 11/22/10 3850 NS NA
MW-3A (Class
no
TDS (mgA,) 5805 NS NA 5860 NS NA NS NA NS NA NS NA 5470 NS NA
11/22/10
5330 NS NA
MW-3A (Class
no
Selenium (ug/L) 89 NS NA 81 4 NS NA NS NA NS NA NS NA NS NS NA 948 NS NA
MW-5 (Class
n) Uranium (ug/L) 75 NS NA 4/26/10 0 39 NS NA NS NA NS NA NS NA NS NA NS NA 11/11/10 116 NS NA
MW-12 (Class Field pH (S U ) 65-85 NS NA 7 16 NS NA NS NA NS NA NS NA 6 62 NS NA 647 NS NA
m) Selenium (ug/L) 25 NS NA 4/27/10 25 7 NS NA NS NA NS NA NS NA 9/20/10 319 NS NA 11/19/10 27 6 NS NA
MW-15 (Class Selenium (ug/L) 128 7 NS NA 100 NS NA NS NA NS NA NS NA NA NS NA 99 5 NS NA
ID) Iron (ug/L) 81 7 NS NA 4/z ll lU ND NS NA NS NA NS NA NS NA NS NA NS NA 11/11/10 ND NS NA
MW-18 (Class
Thalbum (ug/l) 1 95 NS NA 3 73 NS NA NS NA NS NA NS NA 364 NS NA 3 57 NS NA
HI) Sulfate (mg/L) 1938 9 NS NA 5/4/10 1950 NS NA NS NA NS NA NS NA 9/15/10 1930 NS NA 11/18/10 1910 NS NA
Field pH (S U ) 6 25-8 5 NS NA 62 NS NA NS NA NS NA NS NA 7 23 NS NA 6 37 NS NA
TDS (mg/L) 3198 77 NS NA 3280 NS NA NS NA NS NA NS NA 3190 NS NA 3030 NS NA
Ql 2010 Results Q2 2010 Results Q3 2010 Results Q4 2010 Results
Momtonng
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in
Current GWDP Ql Sample Date Ql Result Q2 Sample
Date Q2 Result May Monthly
Sample Date
May
Monthly
Result
June Monthly
Sample Date
June Monthly
Result
July Monthly
Sample Date
July Monthly
Result
August
Monthly
Sample Date
August Monthly
Result
Q3 Sample
Date Q3 Result
October
Monthly Sample
Date
October
Monthly
Result
Q4 Sample
Date Q4 Result
December
Monthly Sample
Date
December
Monthly Result
Required Semi-Annual Sampling Wells, conUnued
MW-19 (Class
ni)
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
68 NS NA MW-19 (Class
ni) Niu-ate + Nitfite (as N)
(mgA.) 2 83 NS NA
5/4/10
26 NS NA NS NA NS NA NS NA
9/15/10
NS NA NA
11/18/10
24 NS NA
MW-23 (Class
ni)
Field pH (S U ) 65-85 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-23 (Class
ni) Manganese (ug/L) 550 NS NA
4/22/10
184 NS NA NS NA NS NA NS NA
9/14/10
NS NS NA
11/22/10
65 NS NA
MW-24 (Class
ni)
Cadmium (ug/L) 25 NS NA
5/6/10
428 NS NA NS NA NS NA NS NA
9/21/10
506 NS NA
11/17/10
3 22 NS NA
MW-24 (Class
ni) Thallium (ug/L) 1 NS NA 5/6/10 13 NS NA NS NA NS NA NS NA 9/21/10 157 NS NA 11/17/10 109 NS NA MW-24 (Class
ni)
Field pH (S U ) 65-85 NS NA
5/6/10
5 91 (5 78) NS NA NS NA NS NA NS NA
9/21/10
6 64 NS NA
11/17/10
61 NS NA
MW-27 (Class
m)
Nitrate+ Niu-ite (as N)
(mgA.) 56 NS NA
5/3/10
58 NS NA NS NA NS NA NS NA
9/14/10
59 NS NA
11/12/10
57 NS NA
MW-27 (Class
m)
Chloride (mg/L) 38 NS NA
5/3/10
42 NS NA NS NA NS NA NS NA
9/14/10
42 NS NA
11/12/10
45 NS NA
MW-27 (Class
m)
Sulfate (mg/L) 462 NS NA
5/3/10
469 NS NA NS NA NS NA NS NA
9/14/10
461 NS NA
11/12/10
452 NS NA MW-27 (Class
m) Field pH (S U ) 6 5-8 5 NS NA 5/3/10 6 78 NS NA NS NA NS NA NS NA 9/14/10 7 68 NS NA 11/12/10 6 89 NS NA
MW-27 (Class
m)
TDS (mgA.) 1075 NS NA
5/3/10
1160 NS NA NS NA NS NA NS NA
9/14/10
1060 NS NA
11/12/10
1110 NS NA
MW-27 (Class
m)
Gross Alpha minus Rn & U
(pCi/L) 2 NS NA
5/3/10
1 6 NS NA NS NA NS NA NS NA
9/14/10
NA NS NA
11/12/10
24 NS NA
MW-28 (Class
m
Chlonde (mg/L) 105 NS NA
4/19/10
108 NS NA NS NA NS NA NS NA
9/14/10
106 NS NA
11/12/10
107 NS NA MW-28 (Class
m Manganese (ug/L) 1837 NS NA 4/19/10 1550 NS NA NS NA NS NA NS NA 9/14/10 NA NS NA 11/12/10 1510 NS NA MW-28 (Class
m Field pH (S U ) 6 1-85 NS NA
4/19/10
5 67 NS NA NS NA NS NA NS NA
9/14/10
5 91 NS NA
11/12/10
5 72 NS NA
MW-29 (Class
ni)
Iron (ug/L) 1869 NS NA
4/27/10
1630 NS NA NS NA NS NA NS NA
NS NA
NS NA
11/9/10
1490 NS NA
MW-29 (Class
ni)
Manganese (ug/L) 5624 NS NA 4/27/10 4820 NS NA NS NA NS NA NS NA NS NA NS NA 11/9/10 4890 NS NA MW-29 (Class
ni) TDS (mg/L) 4400 NS NA 4/27/10 4400 NS NA NS NA NS NA NS NA NS NA NS NA 11/9/10 4390 NS NA
MW-29 (Class
ni)
Field pH (S U ) 6 46 - 8 5 NS NA
4/27/10
6 82 NS NA NS NA NS NA NS NA
NS NA
NS NA
11/9/10
617 NS NA
MW-32 (Class
UI)
Gross Alpha minus Rn & U
(pCi/L) 3 33 NS NA
4/20/10
45 NS NA NS NA NS NA NS NA
9/13/10
29 NS NA
11/10/10
88 NS NA MW-32 (Class
UI)
Field pH (S U ) 64-85 NS NA
4/20/10
6 03 NS NA NS NA NS NA NS NA
9/13/10
6 33 NS NA
11/10/10
6 05 NS NA
Notes —
GWCL values are taken from February 15, 2011 version of GWDP
NS = Not Requu-ed and Not Sampled
NR = Required and Not Reported
NA = Not Apphcable
Exceedances are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses
Pursuant to the October 26 2011 DRC letter gross alpha monitoring ui MW-26 returned to the routine frquency of quarterly These samples were inadvertantly collected and are for informauon only
Table 1 - GWCL Exceedances for Second Quarter 2012 under the July 14,2011 GWDP
Ql 2011 Results Q2 2011 Results Q3 2011 Results Q4 2011 Results
Monitonng
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL m
July 14,2011
GWDP
January 2011
Monthly
Sample Date
January 2011
Monthly Sample
Result
Ql 2011
Sample
Date
Q12011
Result
March 2011
Monthly
Sample Date
March
2011
Monthly
Result
Q2 2011
Sample
Date
Q2 2011
Result
May 2011
Monthly
Sample Date
May 2011
Monthly
Result
June 2011
Monthly
Sample Date
June 2011
Monthly
Result
July 2011
Monthly
Sample Date
July 2011
Monthly
Result
Q3 2011
Sample
Date
Q3 2011
Result
September
2011
Monthly
Sample Date
September
2011 Monthly
Result
Q4 2011
Sample Date
Q4 2011
Result
November
2011 Monthly
Sample Date
November
2011 Monthly
Result
December
2011 Monthly
Sample Date
December
2011
Monthly
Result
Required Quarterly Sampling Wells
MW-11
(Class 0)
Manganese (ug/L) 131 29 121 145 68 148 170 6/15/2011 121 151 8/3/2011 118 106 112 105 100 MW-11
(Class 0) Tetrahydrofuran (ug/L) 115 1/11/11 <1 0 2/2/11 <\ 0 3/15/11 <1 0 4/4/2011 <1 0 5/10/2011 <1 0 6/20/2011 <1 0 7/6/2011 <1 0 8/30/11 <1 0 9/7/2011 <1 0 10/4/2011 <1 0 11/9/2011 <1 0 12/14/2011 <1 0
MW-14
(Class m)
Manganese (ug/L) 2230 30 NA 2020 NA 2140 NA NA NA 1990 NA 1960 NA
12/12/2011
NA MW-14
(Class m) Field pH (S U ) 65-85
1/11/11
6 37
2/7/11
6 22
3/14/11
6 76
4/4/2011
6 63
5/10/2011
637
6/15/2011
5 83
7/5/2011
64
8/3/2011 623
(6 41)
9/8/2011
6 50
10/4/2011
6 71 (6 82)
11/9/2011
6 63
12/12/2011
6 84
MW-25
(Class UI)
Field pH (S U ) 65-85 1/11/11 644 2/2/11 6 66 3/15/11 6 79 4/4/2011 67 5/11/2011 61 6/20/2011 5 77 7/6/2011 629 8/3/2011
8/30/11
6 42
(6 54) 9/7/2011 6 54 10/4/2011 66 11/9/2011 651 1212/2011 6 87 MW-25
(Class UI) Uranium 65
1/11/11
702 4 77 6.8 5 56 6 72
6/20/2011
7 06 6 74 8/3/2011 6 37
9/7/2011
5 96
10/4/2011
5 27
11/9/2011
6 56
1212/2011
6 1
MW-26
(Class UI)
Nitrate + Nitrite (as N)
(mgA.) 0 62
1/12/11
02 0 25 06 08 04 03 09 06 24
10/12/2011
09
11/9/2011
13
12/14/2011
25
MW-26
(Class UI)
Uranium (ug/L) 41 8
1/12/11
32
2/16/11
69 3
3/15/11
31 8
4/1/2011
602
5/10/2011
574
6/20/2011
185
7/6/2011
57 1
8/3/2011
8/30/11
19 0
9/7/2011
56 1
10/12/2011
5«9
11/9/2011
55 6
12/14/2011
57
MW-26
(Class UI)
Chloroform (ug/L) 70
1/12/11
800
2/16/11
730
3/15/11
1200
4/1/2011
390
5/10/2011
7900
6/20/2011
730
7/6/2011
300
8/3/2011
8/30/11
1000
9/7/2011
1300
10/12/2011
440
11/9/2011
1200
12/14/2011
1400
MW-26
(Class UI)
Chlonde (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
10/12/2011
61
11/9/2011
55
12/14/2011
62
MW-26
(Class UI)
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
643
6/20/2011
6 52
7/6/2011
6 35 8/3/2011
8/30/11
6 07
(658) 9/7/2011
6 71
10/12/2011
6 82
11/9/2011
6 75
12/14/2011
7 1 MW-26
(Class UI) Dichloromethane
(Mediylene Chloride)
(UgA.)
5
1/12/11
<1 0
2/16/11
10
3/15/11
14
4/1/2011
3 1
5/10/2011
20
6/20/2011
7
7/6/2011
24
8/3/2011
8/30/11
10
9/7/2011
79
10/12/2011
26
11/9/2011
89
12/14/2011
11
MW-26
(Class UI)
TDS (mgA.) 3284 19
1/12/11
3100
2/16/11
3270
3/15/11
3140
4/1/2011
3310
5/10/2011
3140
6/20/2011
3020
7/6/2011
3270
8/3/2011
8/30/11
3190
9/7/2011
3200
10/12/2011
3190
11/9/2011
3220
12/14/2011
3160
MW-26
(Class UI)
Gross Alpha minus Rn
& U (pCiA.) 4 69
1/12/11
NS
2/16/11
3
3/15/11
27
4/1/2011
33
5/10/2011
39
6/20/2011
43
7/6/2011
28
8/3/2011
8/30/11
27
9/7/2011
25
10/12/2011
22
11/9/2011
NS
12/14/2011
NS
MW-30
(Class II)
Nitrate + Nitrite (as N)
(mgA.) 25
1/10/11
15
2/1/11
16
3/14/11
17
4/11/2011
16
5/10/2011
16
6/20/2011
17
7/5/2011
17
8/3/2011
14
9/7/2011
16
10/4/2011
16
11/8/2011
16
12/12/2011
16
MW-30
(Class II)
Chlonde (mg/L) 128
1/10/11
NS
2/1/11
134
3/14/11
NS
4/11/2011
134
5/10/2011
128
6/20/2011
127
7/5/2011
127
8/3/2011
126
9/7/2011
145
10/4/2011
129
11/8/2011
122
12/12/2011
124 MW-30
(Class II) Field pH (S U ) 65-85 1/10/11 6 65 2/1/11 6 96 3/14/11 7 10 4/11/2011 6 83 5/10/2011 67 6/20/2011 5 66 7/5/2011 6 65 8/3/2011 661 9/7/2011 6 80 10/4/2011 6 96 (6 73) 11/8/2011 6 83 12/12/2011 7 14
MW-30
(Class II)
Uranium (ug/L) 8 32
1/10/11
NS
2/1/11
5 97
3/14/11
NS
4/11/2011
6 49
5/10/2011
NS
6/20/2011
NS
7/5/2011
NS
8/3/2011
8
9/7/2011
NS
10/4/2011
983
11/8/2011
NS
12/12/2011
NS
MW-30
(Class II)
Selenium (ug/L) 34
1/10/11
362
2/1/11
34 7
3/14/11
34
4/11/2011
444
5/10/2011
38 3
6/20/2011
38 7
7/5/2011
32 4
8/3/2011
J9 7
9/7/2011
32 4
10/4/2011
36 6
11/8/2011
368
12/12/2011
38
MW-31
(Class ni)
Nitrate + Nitnte (as N)
(mgA.) 5
1/10/11
19
2/1/11
21
3/14/11
22
4/1/2011
21
5/10/2011
20
6/20/2011
22
7/5/2011
22
8/2/2011
20
9/6/2011
21
10/3/2011
21
11/8/2011
21
12/12/2011
21
MW-31
(Class ni)
TDS (mg/L) 1320
1/10/11
1240
2/1/11
1220
3/14/11
1250
4/1/2011
1370
5/10/2011
1290
6/20/2011
1330
7/5/2011
1280
8/2/2011
1300
9/6/2011
1300
10/3/2011
1320
11/8/2011
1290
12/12/2011
1330 MW-31
(Class ni) Chlonde (mgA.) 143 1/10/11 NS 2/1/11 145 3/14/11 NS 4/1/2011 143 5/10/2011 143 6/20/2011 145 7/5/2011 148 8/2/2011 148 9/6/2011 148 10/3/2011 145 11/8/2011 145 12/12/2011 148 MW-31
(Class ni)
Field pH (S U ) 65-85
1/10/11
6 65
2/1/11
721
3/14/11
7 43
4/1/2011
7 01
5/10/2011
6 73
6/20/2011
616
7/5/2011
6 64
8/2/2011
6 67
9/6/2011
7 03
10/3/2011
7 28 (7 34)
11/8/2011
701
12/12/2011
7 46
MW-31
(Class ni)
Sulfate (mg/L) 532
1/10/11
NS
2/1/11
538
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
541
10/3/2011
559
11/8/2011
552
12/12/2011
530
MW-35
(Class U)
Manganese (ug/L) 200 NS NA
2/15/11
248 NS NA
6/7/2011
369 NS NA NS NA
7/20/11
348
8/30/2011
267
9/7/11
270
10/3/11
27/
11/8/2011
283
12/14/11
247
MW-35
(Class U)
Thalbum (ugA) 05 NS NA
2/15/11
<0 50 NS NA
6/7/2011
<0 50 NS NA NS NA
7/20/11
NS
8/30/2011
052
9/7/11
NS
10/3/11
0 57
11/8/2011
<050
12/14/11
0 63
MW-35
(Class U)
Gross Alpha minus Rn
& U (pCiA.) 3 75 NS NA 2/15/11 26 NS NA 6/7/2011 37 NS NA NS NA 7/20/11 NS 8/30/2011 45 9/7/11 NS 10/3/11 44 11/8/2011 47 12/14/11 42 MW-35
(Class U)
Selenium (ug/L) 12 5 NS NA
2/15/11
ND NS NA
6/7/2011
ND NS NA NS NA
7/20/11
NA
8/30/2011
93
9/7/11
NA
10/3/11
105
11/8/2011
NA
12/14/11
NA
MW-35
(Class U)
Uranium (ug/L) 75 NS NA
2/15/11
12 7 NS NA
6/7/2011
21 7 NS NA NS NA
7/20/11
242
8/30/2011
183
9/7/11
22 3
10/3/11
201
11/8/2011
24
12/14/11
23 6
Required Semi-Annual Sampling Wells
MW-2 (Class
in)
Gross Alpha minus Rn
& U (pCi/L) 32 NS NA 1 1 NS NA 4/12/2011 1 2 NS NA NS NA NS NA 8/8/2011 05 NS NA 10/5/2011 1 3 NS NA NS NA
MW-3 (Class
in)
Selenium (ug/L) 37 NS NA
2/15/11
405 NS NA
4/13/2011
45 4 NS NA NS NA NS NA
8/10/2011
46 NS NA
10/10/2011
467 NS NA NS NA MW-3 (Class
in) Field pH (S U ) 65-85 NS NA 2/15/11 6 09 NS NA 4/13/2011 646 NS NA NS NA NS NA 8/10/2011 6 32 NS NA 10/10/2011 6 53 (6 83) NS NA NS NA
MW-3 (Class
in)
Fluonde (Mg/L) 0 68 NS NA
2/15/11
069 NS NA 0 68 NS NA NS NA NS NA
8/10/2011
0 96 NS NA
10/10/2011
0 9/ NS NA NS NA
MW 3A
(Class IU)
Field pH (S U ) 65-85 NS NA 6 05 NS NA 6 58 NS NA NS NA NS NA 619 NS NA 6 5 (6 92) NS NA NS NA
MW 3A
(Class IU) 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 10/11/2011 5750 NS NA NS NA
MW 3A
(Class IU)
TDS (mg/L) 5805 NS NA 5770 NS NA 5720 NS NA NS NA NS NA 5810 NS NA 5630 NS NA NS NA
MW 3A
(Class IU)
Selenium (ug/L) 89 NS NA 99 NS NA 85 8 NS NA NS NA NS NA 88 5 NS NA 95 NS NA NS NA
MW-5 (Class
n) Uranium (ug/L) 75 NS NA 2/14/11 295 NS NA 4/12/2011 7 16 NS NA NS NA NS NA 8/9/2011 05 NS NA 10/10/2011 4 52 NS NA NS NA
MW-12
(Class ni)
Field pH (S U ) 65-85 NS NA 643 NS NA A IC I'^fW 1 6 67 NS NA NS NA NS NA 6 13 NS NA 1 A/£ /OA 1 1 6 7 (6 97) NS NA NS NA MW-12
(Class ni) Selenium (ug/L) 25 NS NA 2/15/11 39 NS NA 4/5/zUl 1 21 7 NS NA NS NA NS NA 8/9/2011 25 4 NS NA lU/6/2011 55* NS NA NS NA
MW-15 Selenium (ug/L) 128 7 NS NA NA NS NA A11 'y /^A1 1 116 NS NA NS NA NS NA NS NA NS NA 1 A/1 A/OA 1 1 112 NS NA NS NA
(Class UI) b-on (ug/L) 81 7 NS NA NS NA NS NA 4/lZ/iUl 1 <0 50 NS NA NS NA NS NA NS NA NS NA lU/lO/zUl 1 137 NS NA NS NA
MW-18
Thallium (ug/l) 1 95 NS NA 3 49 NS NA 3 74 NS NA NS NA NS NA 40 339 NS NA 3 83 NS NA NS NA
(Class IU) 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 1910 NS NA 10/11/2011 2020 NS NA NS NA
Field pH (S U ) 6 25-8 5 NS NA 6 27 NS NA 671 NS NA NS NA NS NA 9/21/11 5 95 NS NA 6 55 (6 63) NS NA NS NA
TDS (mg/L) 3198 77 NS NA 3250 NS NA 5250 NS NA NS NA NS NA 3190 NS NA 5220 NS NA NS NA
Ql 2011 Results Q2 2011 Results Q3 2011 Results Q4 2011 Results
Monitonng
Well (Water
Class)
Constituent Exceeding
GWCL
GWCLui
Current
GWDP
January 2011
Monthly
Sample Date
January 2011
Monthly Sample
Result
Ql 2011
Sample
Date
Ql 2011
Result
March 2011
Monthly
Sample Date
March
2011
Monthly
Result
Q2 2011
Sample
Date
Q2 2011
Result
May 2011
Monthly
Sample Date
May 2011
Monthly
Result
June 2011
Monthly
Sample Date
June 2011
Monthly
Result
July 2011
Monthly
Sample Date
July 2011
Monthly
Result
Q3 2011
Sample
Date
Q32011
Result
September
2011
Monthly
Sample Date
September
2011 Monthly
Result
Q4 20n
Sample Date
Q4 2011
Result
November
2011 Monthly
Sample Date
November
2011 Monthly
Result
December
2011 Monthly
Sample Date
December
2011
Monthly
Result
Required Semi-Annual Sampling Wells, continued
MW-19
(Class ni)
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
10/12/2011
6 88 (7 02) NS NA NS NA MW-19
(Class ni) Nitrate + Nitrite (as N)
(mgA.) 2 83 NS NA
2/21/2011
NS NS NA
4/5/2011
26 NS NA NS NA NS NA
7/20/3011
NS NS NA
10/12/2011
40 NS NA NS NA
MW-23
(Class IU)
Field pH (S U ) 65-85 NS NA 2/9/2011 6.13 NS NA 4/5/2011 7 14 NS NA NS NA NS NA 8/4/2011 6 38 NS NA 10/6/2011 6 56 (6 77) NS NA NS NA MW-23
(Class IU) Manganese (ug/L) 550 NS NA
2/9/2011
NS NS NA
4/5/2011
32 NS NA NS NA NS NA
8/4/2011
NS NS NA
10/6/2011
55/ NS NA NS NA
MW-24
(Class ni)
Cadmium (ug/L) 25 NS NA
2/10/2011
2 78 NS NA
4/5/2011
2 61 NS NA NS NA NS NA
8/4/2011
1 46 NS NA
10/11/2011
1 78 NS NA NS NA MW-24
(Class ni) Thallium (ug/L) 1 NS NA 2/10/2011 142 NS NA 4/5/2011 107 NS NA NS NA NS NA 8/4/2011 <0 50 NS NA 10/11/2011 0 62 NS NA NS NA MW-24
(Class ni)
Field pH (S U ) 65-85 NS NA
2/10/2011
5 75 NS NA
4/5/2011
612 NS NA NS NA NS NA
8/4/2011
6 45 NS NA
10/11/2011
644 NS NA NS NA
MW-27
(Class m)
Nitrate + Nitrite (as N)
(mgA.) 56 NS NA
2/9/2011
6 NS NA
4/5/2011
64 NS NA NS NA NS NA
8/8/2011
6 NS NA
10/5/2011
63 NS NA NS NA
MW-27
(Class m)
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
10/5/2011
44 NS NA NS NA
MW-27
(Class m)
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
10/5/2011
456 NS NA NS NA MW-27
(Class m) Field pH (S U ) 6 5-8 5 NS NA 2/9/2011 671 NS NA 4/5/2011 6 79 NS NA NS NA NS NA 8/8/2011 6 39 NS NA 10/5/2011 7 17 (7 24) NS NA NS NA
MW-27
(Class m)
TDS (mgA.) 1075 NS NA
2/9/2011
1090 NS NA
4/5/2011
1190 NS NA NS NA NS NA
8/8/2011
1090 NS NA
10/5/2011
1110 NS NA NS NA
MW-27
(Class m)
Gross Alpha minus Rn
& U (pCi/L) 2 NS NA
2/9/2011
07 NS NA
4/5/2011
1 1 NS NA NS NA NS NA
8/8/2011
08 NS NA
10/5/2011
1 5 NS NA NS NA
MW-28
(Class ni)
Chlonde (mg/L) 105 NS NA
2/14/2011
114 NS NA
4/11/2011
109 NS NA NS NA NS NA
8/8/2011
105 NS NA
10/5/2011
143 NS NA NS NA MW-28
(Class ni) Manganese (ug/L) 1837 NS NA 2/14/2011 NA NS NA 4/11/2011 1690 NS NA NS NA NS NA 8/8/2011 NA NS NA 10/5/2011 1540 NS NA NS NA MW-28
(Class ni)
Field pH (S U ) 6 1-85 NS NA
2/14/2011
5 69 NS NA
4/11/2011
6 01 NS NA NS NA NS NA
8/8/2011
5 7« NS NA
10/5/2011
507(6 M) NS NA NS NA
MW-29
(Class III)
Iron (ug/L) 1869 NS NA NS NA NS NA
4/18/2011
3010 NS NA NS NA NS NA
8/9/2011
1080 NS NA
10/5/2011
1220 NS NA NS NA
MW-29
(Class III)
Manganese (ug/L) 5624 NS NA NS NA NS NA 4/18/2011 4900 NS NA NS NA NS NA 8/9/2011 NA NS NA 10/5/2011 4800 NS NA NS NA MW-29
(Class III) IDS (mg/L) 4400 NS NA NS NA NS NA 4/18/2011 4080 NS NA NS NA NS NA 8/9/2011 NA NS NA 10/5/2011 4280 NS NA NS NA
MW-29
(Class III)
Field pH (S U ) 6 46 - 8 5 NS NA NS NA NS NA
4/18/2011
645 NS NA NS NA NS NA
8/9/2011
620 NS NA
10/5/2011
6 52 NS NA NS NA
MW-32
(Class IU)
Gross Alpha minus Rn
& U (pCiA.) 3 33 NS NA
2/9/2011
1 5 NS NA
4/1/2011
46 NS NA NS NA NS NA 8/2/2011
8/30/11
1 9 NS NA
10/3/2011
57 NS NA NS NA MW-32
(Class IU)
Field pH (S U ) 64-85 NS NA
2/9/2011
5 99 NS NA
4/1/2011
614 NS NA NS NA NS NA
8/2/2011
8/30/11 610
(620) NS NA
10/3/2011
6 35 NS NA NS NA
Notes
GWCL values are taken from July 14, 2011 version of GWDP
NS = Not Requu-ed and Not Sampled
NR = Required and Not Reported
NA = Not Applicable
Exceedances are shown in yellow
Values m () parentheses are the field pH measurements for the resampled analyses
Pursuant to the October 26 2011 DRC letter gross alpha monitoring m MW-26 returned to the routine frquency of quarterly These samples were inadvertantly coUected and are for
information only
Table 1 - GWCL Exceedances for Second Quarter 2012 under the July 14,2011 GWDP
Ql 2012 Results Q2 2012 Results
Monitonng Well
(Water Class)
Constituent
Exceeding GWCL
GWCL m July 14,
2011 GWDP
January 2012
Monthly Sample
Date
January 2012
Monthly Result
Ql 2012 Sample
Date Ql 2012 Result
March 2012
Monthly Sample
Date
March 2012
Monthly Result
Apnl 2012 Monthly
Sample Date
April 2012 Monthly
Result
Q2 2012 Sample
Date Q2 2012 Result
June 2012
Monthly Sample
Date
June 2012
Monthly
Result
Sample Frequency
Required Quarterly Sampling Wells
MW-11 (Class 11)
Manganese (ug/L) 131 29 102 154 121 /52 127
6/19/2012
122 1 Quarterly
MW-11 (Class 11) Tetrahydrofuran 115 1/26/2012 <1 0 2/13/2012 251 3/13/2012 <1 0 4/10/2012 <1 0 5/8/2012 <1 0 6/19/2012
122
Quarterly
MW-14 (Class ni)
Manganese (ug/L) 2230 30 NA 1790 NA NA 2560
6/19/2012
NA Quarterly
MW-14 (Class ni)
Field pH (S U ) 65-85 1/24/2012
6 36
2/21/2012 6 57 3/14/2012
651
4/12/2012
6 97
5/9/2012
6 73
6/19/2012
6 90 Quarterly
MW-25 (Class IU) Field pH (S U ) 65-85 1/25/2012 6 63 2/14/2012 6 83 3/14/2012 6 55 4/9/2012 6 58 5/2/2012 6 73 6/18/2012 6 99 Quarterly MW-25 (Class IU)
Uranium 65 66 65 6 95 6 52
5/2/2012
5 90
6/18/2012
76 Quarterly
MW-26 (Class UI)
Nitrate + Nitrite (as
N) (mgA.) 0 62 19 2/15/2012 12 5 34 29
6/19/2012
25 Quarterly
MW-26 (Class UI)
Uranium (ug/L) 41 8 646 2/21/2012 594 31 2
4/11/2012
42 2
5/7/2012
6/26/2012
18 2
6/19/2012
66 0 Quarterly
MW-26 (Class UI)
Chloroform (ug/L) 70 1900 2/15/2012 3300 2900
4/11/2012
2900
5/7/2012
6/26/2012
1700
6/19/2012
2400 Quarterly
MW-26 (Class UI)
Chloride (mg/L) 58 31
1/25/2012
68 2/15/2012 40
3/14/2012
74
4/11/2012
82
5/7/2012
6/26/2012
74
6/19/2012
85 Quarterly
MW-26 (Class UI)
Field pH (S U ) 6 74 - 8 5
1/25/2012
6 59 2/15/2012 2/21/2012
3/8/2012 6 72 (6 91) (6 71)
3/14/2012
6 39
4/11/2012
6 88 5/7/2012
6/26/2012
7 00(7 01)
6/19/2012
7 00 Quarterly
MW-26 (Class UI)
Dichloromethane
(Methylene Chlonde)
(UgA.)
5
1/25/2012
13 2/15/2012 24
3/14/2012
27
4/11/2012
20
5/7/2012
6/26/2012
10
6/19/2012
16 Quarterly
MW-26 (Class UI)
TDS (mg/L) 3284 19
1/25/2012
3250
2/15/2012
3150
3/14/2012
3220
4/11/2012
3140
5/7/2012
6/26/2012
3240
6/19/2012
3200 Quarterly
MW-26 (Class UI)
Gross Alpha minus
Rn & U (pCi/L) 4 69 NS NA 2/21/2012 1 5
3/14/2012
4
4/11/2012
23
5/7/2012
6/26/2012
3 1
6/19/2012
NA Quarterly
MW-30 (Class U)
Nitrate + Nitrite (as
N) (mgA.) 25
1/24/2012
17
2/14/2012
17
3/14/2012
18
4/10/2012
17
5/2/2012
16
6/18/2012
/5 0 Quarterly
MW-30 (Class U)
Chloride (mgA.) 128 1/24/2012 124
2/14/2012
126
3/14/2012
128
4/10/2012
128
5/2/2012
124
6/18/2012
131 (Quarterly
MW-30 (Class U) Field pH (S U ) 65-85
1/24/2012
6 52 2/14/2012 7 12 3/14/2012 6 86 4/10/2012 7 66 5/2/2012 6 95 6/18/2012 7 10 Quarterly MW-30 (Class U)
Uranium (ug/L) 8 32 NS NA
2/14/2012
7 42
3/14/2012
8 38
4/10/2012
7 84
5/2/2012
681
6/18/2012
78 Quarterly
MW-30 (Class U)
Selenium (ug/L) 34 1/24/2012 33 3
2/14/2012
55
3/14/2012
395
4/10/2012
59/
5/2/2012
32 3
6/18/2012
57 Quarterly
MW-31 (Class ni)
Nitrate + Nitnte (as
N) (mgA.) 5
1/24/2012
21
2/13/2012
21
3/13/2012
22
4/9/2012
21
5/2/2012
20
6/18/2012
6/29/2012
216 Quarterly
MW-31 (Class ni)
TDS (mg/L) 1320
1/24/2012
1360
2/13/2012
1240
3/13/2012
1400
4/9/2012
1380
5/2/2012
1410 6/18/2012
6/29/2012
1460 Quarterly
MW-31 (Class ni) Chlonde (mg/L) 143 1/24/2012 155 2/13/2012 /50 3/13/2012 152 4/9/2012 160 5/2/2012 151 6/18/2012
6/29/2012 138 Quarterly MW-31 (Class ni)
Field pH (S U ) 65-85
1/24/2012
6 78
2/13/2012
7 37
3/13/2012
7 13
4/9/2012
7 14
5/2/2012
7 19
6/18/2012
6/29/2012 7 28
7 63 Quarterly
MW-31 (Class ni)
Sulfate (mg/L) 532
1/24/2012
559
2/13/2012
55«
3/13/2012
517
4/9/2012
547
5/2/2012
532
6/18/2012
6/29/2012
497 Quarterly
MW-35 (Class U)
Manganese (ug/L) 200
1/24/2012
264
2/14/12
255
3/13/12
269
4/10/2012
277
5/2/2012
25«
6/19/2012
304 (Quarterly
MW-35 (Class U)
Thalbum (ugA) 05
1/24/2012
<050
2/14/12
0 65
3/13/12
0 71
4/10/2012
059
5/2/2012
066
6/19/2012
<0 50 Quarterly
MW-35 (Class U) Gross Alpha minus
Rn & U (pCi/L) 3 75
1/24/2012
65 2/14/12 41
3/13/12
62 4/10/2012 41 5/2/2012 45 6/19/2012 49 Quarterly MW-35 (Class U)
Selenium (ug/L) 125 NS NA
2/14/12
19 7 NS NA
4/10/2012
NS
5/2/2012
114
6/19/2012
70 Quarterly
MW-35 (Class U)
Uranium (ug/L) 75 1/24/2012 161
2/14/12
24 7 3/13/12 24 9
4/10/2012
22 4
5/2/2012
22 2
6/19/2012
22 5 Quarterly
Required Semi-Annual Sampling Wells
MW-2 (Class UI) Gross Alpha minus
Rn & U (pCi/L) 32 NS NA 2/22/2012 06 NS NA NS NA 5/9/2012 06 NS NA Semi-Annually
MW-3 (Class IU)
Selenium (ug/L) 37 NS NA
2/29/2012
431 NS NA NS NA
5/14/2012
52 « NS NA Semi-Annually
MW-3 (Class IU) Field pH (S U ) 6 5-85 NS NA 2/29/2012 6 63 NS NA NS NA 5/14/2012 6 67 NS NA Semi-AnnuaUy MW-3 (Class IU)
Fluonde (Mg/L) 0 68 NS NA
2/29/2012
0 86 NS NA NS NA
5/14/2012
104 NS NA Semi-Annually
MW-3A (Class UI)
Field pH (S U ) 65-85 NS NA 646 NS NA NS NA
5/15/2012
6 68 NS NA Semi-Annually
MW-3A (Class UI) Sulfate (mg/L) 3640 NS NA 3/1/2012 3020 NS NA NS NA 5/15/2012 3220 NS NA Semi-Annually MW-3A (Class UI)
TDS (mg/L) 5805 NS NA 5690 NS NA NS NA
5/15/2012
5730 NS NA Semi-Annually
MW-3A (Class UI)
Selenium (ug/L) 89 NS NA 65 8 NS NA NS NA 85 1 NS NA Semi-Annually
MW-5 (Class n) Uranium (ug/L) 75 NS NA 2/28/2012 18 6 NS NA NS NA 5/9/2012 1 23 NS NA Semi-Annually
Field pH (S U ) 65-85 NS NA 681 NS NA NS NA C / 1 A/OA 1 O 691 NS NA Semi-Annually
MW-12 (Class 10) Selenium (ug/L) 25 NS NA 2/29/2012 272 NS NA NS NA 5/IU/2012 196 NS NA Semi-Annually
K4\l/ 1 C ITr\ Selenium (ug/L) 128 7 NS NA o/oo /OA 1 O NA NS NA NS NA c /QA)A 1 O /52 NS NA Semi-Annually
MW-IS (Class lU) b-on (ug/L) 81 7 NS NA 2/22/2012 <30 NS NA NS NA 5/y/2U12 <30 NS NA Semi-Annually
Thalbum (ugA) 1 95 NS NA 5 65 NS NA NS NA 5 5/ NS NA Semi-Annually
MW-18 (Class ni) Sulfate (mg/L) 19389 NS NA 2/27/2012 1920 NS NA NS NA 4/30/2012 1790 NS NA Semi-Annually
Field pH (S U ) 6 25-8 S NS NA 66 NS NA NS NA 6 59 NS NA Semi-Annually
TDS (mg/L) 3198 77 NS NA 5250 NS NA NS NA 52«0 NS NA Semi-Annually
Ql 2012 Results |
Monitonng Well
(Water Class)
Constituent
Exceeding GWCL
GWCL in Current
GWDP
January 2012
Monthly Sample
Date
January 2012
Monthly Result
Ql 2012 Sample
Date Ql 2012 Result
March 2012
Monthly Sample
Date
March 2012
Monthly Result
Apnl 2012 Monthly
Sample Date
Apnl 2012 Monthly
Result
Q2 2012 Sample
Date Q2 2012 Result
June 2012
Monthly Sample
Date
June 2012
Monthly
Result
Sample Frequency
Required Senu-Annual Sampling Wells, contmued
MW-19 (Class UI) Field pH (S U ) 6 78-8 5 NS NA
2/28/2012
6 83 NS NA NS NA
5/16/2012
6 86 NS NA Semi-Annually MW-19 (Class UI)
Nitrate + Nitrite (as
N) (mgA.) 2 83 NS NA
2/28/2012
59 NS NA NS NA
5/16/2012
5 7 NS NA Semi-Annually
MW-23 (Class UI) Field pH (S U ) 65-85 NS NA 2/20/2012 661 NS NA NS NA 5/16/2012 6 74 NS NA Semi-Annually MW-23 (Class UI)
Manganese (ug/L) 550 NS NA
2/20/2012
51 NS NA NS NA
5/16/2012
49 NS NA Semi-Annually
MW-24 (Class HI)
Cadmium (ug/L) 25 NS NA
2/23/2012
2 25 NS NA NS NA
5/10/2012
2 01 NS NA Semi-Annually
MW-24 (Class HI) Thalbum (ug/L) 1 NS NA 2/23/2012 0 96 NS NA NS NA 5/10/2012 0 74 NS NA Semi-Annually MW-24 (Class HI)
Field pH (S U ) 65-85 NS NA
2/23/2012
6 05 NS NA NS NA
5/10/2012
6 2/ NS NA Semi-Annually
MW-27 (Class UI)
Nitrate + Nitrite (as
N) (mgA.) 56 NS NA
2/28/2012
6.4 NS NA NS NA
5/1/2012
62 NS NA Semi-/\nnually
MW-27 (Class UI)
Chlonde (mg/L) 38 NS NA
2/28/2012
45 NS NA NS NA
5/1/2012
46 NS NA Semi-Annually
MW-27 (Class UI) Sulfate (mg/L) 462 NS NA
2/28/2012
451 NS NA NS NA
5/1/2012
446 NS NA Semi-Annually MW-27 (Class UI) Field pH (S U ) 6 5-8 5 NS NA 2/28/2012 7 24 NS NA NS NA 5/1/2012 7 03 NS NA Semi-Annually MW-27 (Class UI)
TDS (mgA.) 1075 NS NA
2/28/2012
1140 NS NA NS NA
5/1/2012
1170 NS NA Semi-Annually
MW-27 (Class UI)
Gross Alpha minus
Rn & U (pCi/L) 2 NS NA
2/28/2012
23 NS NA NS NA
5/1/2012
08 NS NA Semi-Annually
MW-28 (Class UI)
Chloride (mg/L) 105 NS NA
2/28/2012
109 NS NA NS NA
5/8/2012
114 NS NA Semi-Annually
MW-28 (Class UI) Manganese (ug/L) 1837 NS NA 2/28/2012 NA NS NA NS NA 5/8/2012 1850 NS NA Semi-Annually MW-28 (Class UI)
Field pH (S U) 6 1-85 NS NA
2/28/2012
6 22 NS NA NS NA
5/8/2012
6 15 NS NA Semi-/^nually
MW-29 (Class UI)
Iron (ug/L) 1869 NS NA
2/22/2012
1310 NS NA NS NA
5/8/2012
1400 NS NA Semi-Annually
MW-29 (Class UI) Manganese (ug/L) 5624 NS NA 2/22/2012 NA NS NA NS NA 5/8/2012 6/40 NS NA Semi-Annually MW-29 (Class UI) TDS (mg/L) 4400 NS NA 2/22/2012 NA NS NA NS NA 5/8/2012 4600 NS NA Semi-Annually MW-29 (Class UI)
Field pH (S U ) 6 46 - 8 5 NS NA
2/22/2012
7 12 NS NA NS NA
5/8/2012
6 47 NS NA Semi-Annually
MW-32 (Class UI)
Gross Alpha mmus
Rn & U (pCiA.) 3 33 NS NA
2/21/2012
1 8 NS NA NS NA
4/30/2012
24 NS NA Semi-Annually
MW-32 (Class UI)
Field pH (S U ) 64-85 NS NA
2/21/2012
6 57 NS NA NS NA
4/30/2012
640 NS NA Semi-Annually
Notes
GWCL values are taken from February 15, 2011 version of GWDP
NS = Not Requu-ed 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
Pursuant to the October 26 2011 DRC letter gross alpha monitonng m MW-26 retumed to the rouune frquency of quarterly These samples were inadvertantly collected and are for information only