DRC-2015-005419 - 0901a0688055a84c

r, ENERGY FUELS
Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140
www energyfuels.com
August 14, 2015
VIA PDF AND OVERNIGHT DELIVERY
Scott Anderson,
Director of Waste Management and Radiation Control
State of Utah Department of Environmental Quality
195 North 1950 West
P.O. Box 144880
Salt Lake City, UT 84114-4880
Div of Waste Management
and Radiation Control
AU6 11 2015
DRC-20l5-OO54-n
Re: State of Utah Ground Water Discharge Permit No. UGW370004
White Mesa Uranium Mill - Notice Pursuant to Part I.G.I (a)
Dear Mr. Anderson:
The White Mesa Mill (the "Mill") performed second quarter ("Q2") groundwater monitoring during the
period from April I, to June 30, 2015 under the August 24, 2012 version of the Mill's Groundwater
Discharge Permit (the "GWDP"). All analytical data needed for comparison to the GWCLs were
received during the period ending July 16, 2015.
Pursuant to Part I.G.I.a) of the GWDP, (August 24, 2012) 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 I.G.I 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 2015 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 Energy Fuels Resources
(USA) Inc. ("EFRI") or in light of other reports submitted by EFRI, and as determined by Division of
Waste Management and Radiation Control ("DWMRC") (formerly Division of Radiation Control
["DRC"]) Staff. A description of the other actions and reports which have affected the requirement to
submit a plan and time schedule are as follows:
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, EFRI and the
Director acknowledged 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. EFRI submitted a Corrective Action Plan ("CAP") in February 2012 for nitrate
+ nitrite and chloride in groundwater. The CAP was approved on December 12, 2012 and the
activities associated with the CAP are on-going. Based on information provided by DWMRC in
Letter to Mr. Scott Anderson
August 14,2015
Page 2
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. EFRl's letter to the Director dated January 31, 2011 proposed
the recalculation of the GWCLs for field pH. Following the statistical evaluation of pH data by
EFRFs geochemical consultant, INTERA, Inc., EFRI compared the Mill's groundwater pH data
from Q2 2011 and noted that all of the June 2011 groundwater results, and many of the other
results from Q2 2011, were already outside the revised GWCLs that were to be proposed in the
June 30, 2011 letter. Pursuant to teleconferences with DWMRC on December 5, and December
19, 2011, EFRI submitted a Work Plan and Schedule on January 20, 2012 and a revised plan
based on DWMRC comments on April 13, 2012. Based on the approved Work Plan and Time
Schedule, EFRI and DWMRC entered into a Stipulated Consent Agreement ("SCA") dated July
12, 2012. The SCA required the completion of the pH Report and the Pyrite Investigation and
associated report. The pH Report and Pyrite Investigation Report were submitted November 9,
2012 and December 7, 2012 respectively. By letter dated April 25, 2013, DWMRC accepted the
conclusions that the out-of-compliance results for pH are due to background effects within the
aquifer matrix and are not caused by Mill activities. DWMRC also approved the recalculation of
the GWCLs. As a result, the 30-day plan and schedule for assessment is not required for field pH
exceedances.
3. A Plan and Time Schedule will not be prepared for monitoring wells with two successive
exceedances if successive exceedances were reported in a previous quarter and were included in
the Source Assessment Reports ("SARs"), submitted October 10, 2012, May 8, 2013, August 30,
2013, December 17, 2013, January 13, 2014, and March 19, 2014 and the Plan and Time
Schedule submitted January 8, 2015. A Plan and Time Schedule will not be submitted for those
constituents covered by the previously mentioned SARs, because the conclusions and actions
delineated in those reports were either accepted by DWMRC as documented in DWMRC
correspondence dated April 25, 2013, July 23, 2013, September 17, 2013 January 7, 2014, March
10, 2014, and June 5, 2014 respectively.
4. Chloroform and methylene chloride are the subject of the ongoing chloroform pumping program
and are covered by State of Utah Notice of Violation ("NOV") and Groundwater Corrective
Action Order ("CAO") State of Utah Department of Environmental Quality ("UDEQ") Docket
No. UGW-20-01. As a result, the 30-day plan and schedule for assessment of chloroform and
methylene chloride exceedances is not required.
It is important to note that under 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. In fact, more frequent sampling of a
given analyte will increase the number of exceedances due to statistical variation and not due to Mill
activity. Additionally, given the slow velocity of groundwater movement, accelerated sampling at a
monthly frequency can result in resampling of essentially the same water and can lead to repeat
Letter to Mr. Scott Anderson
August 14, 2015
Page 3
exceedances for accelerated constituents not due to Mill activities, but due to repeat sampling of the same
water.
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 2015. A 30-day plan and schedule contemplated in Part I.G.I c)
of the GWDP will not be required for the consecutive exceedances below 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 SARs
submitted to DWMRC October 10, 2012, May 8, 2013, August 30, 2013, December 17, 2013, January 13,
2014, and March 19, 2014 and the Plan and Time Schedule submitted January 8, 2015.
MW-11
• Manganese concentrations exceeded the GWCL in MW-11 in the March monthly and Q2 2015
sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-26
• Nitrate + nitrite has exceeded its GWCL in the March monthly and Q2 2015 sampling events. As
mentioned above, a CAP has been submitted and approved and the specified actions are currently
being implemented; therefore a plan to address this consecutive exceedance is not necessary and
is not being submitted.
• Chloroform has exceeded its GWCL for all of the Q2 2015 sampling events. MW-26 is used as a
pumping well for the ongoing chloroform capture program and is expected to yield increased
concentrations of chloroform. Because this well is used in the chloroform capture program
which is the subject of separate investigations and actions, a plan and time schedule to address the
consecutive exceedances is not necessary and is not being submitted.
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 DWMRC in teleconferences
on April 27, and May 2, 2011, due to the 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.
• The uranium concentration exceeded its GWCL in all of the Q2 2015 sampling events. This
consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR,
the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will
Letter to Mr. Scott Anderson
August 14, 2015
Page 4
become effective upon their publication in the next revision of the GWDP. As a result of
DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to address this
consecutive exceedance is not necessary and will not be submitted. Until such time as the new
GWCLs become effective, the exceedances will continue to be noted and reported.
• Field pH has been slightly outside (slightly lower than) the GWCL in all of the Q2 2015 sampling
events. As mentioned above, site-wide pH issues and trends are addressed in reports submitted
on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012 report, the
GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of
DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to address this
consecutive exceedance is not necessary and will not be submitted. Until such time as the new
GWCLs become effective, the exceedances will continue to be noted and reported.
• The chloride concentration exceeded its GWCL in all of the Q2 2015 sampling events. As
mentioned above, a CAP has been submitted and approved to address nitrate+nitrite
contamination which is expected to address chloride in groundwater. The actions specified in the
CAP are currently being implemented; therefore a plan to address this consecutive exceedance is
not necessary and is not being submitted.
MW-30
• Nitrate + nitrite has exceeded its GWCL in all of the Q2 2015 sampling events. As mentioned
above, a CAP has been submitted and approved and the specified actions are currently being
implemented; therefore a plan to address this consecutive exceedance is not necessary and is not
being submitted.
• The chloride concentration exceeded its GWCL all of the Q2 2015 sampling events. As
mentioned above, a CAP has been submitted and approved to address nitrate+nitrite
contamination which is expected to address chloride in groundwater. The actions specified in the
CAP are currently being implemented; therefore a plan to address this consecutive exceedance is
not necessary and is not being submitted.
• The selenium concentration exceeded its GWCL in all of the Q2 2015 sampling events. This
consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR,
the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of
DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to address this
consecutive exceedance is not necessary and will not be submitted. Until such time as the new
GWCLs become effective, the exceedances will continue to be noted and reported.
MW-31
• Nitrate + nitrite has exceeded its GWCL in all of the Q2 2015 sampling events. As mentioned
above, a CAP has been submitted and approved and the specified actions are currently being
implemented; therefore a plan to address this consecutive exceedance is not necessary and is not
being submitted.
• The chloride concentration exceeded its GWCL in all of the monitoring periods for Q2 2015. As
mentioned above, a CAP has been submitted and approved to address nitrate+nitrite
Letter to Mr. Scott Anderson
August 14, 2015
Page 5
contamination which is expected to address chloride in groundwater. The actions specified in the
CAP are currently being implemented; therefore a plan to address this consecutive exceedance is
not necessary and is not being submitted.
• The sulfate concentration exceeded its GWCL in all of the monitoring periods for Q2 2015. This
consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR,
the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will
become effective upon their publication in the next revision of the GWDP. As a result of
DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to address this
consecutive exceedance is not necessary and will not be submitted. Until such time as the new
GWCLs become effective, the exceedances will continue to be noted and reported.
• The selenium concentration exceeded its GWCL in all of the monitoring periods for Q2 2015.
This consecutive exceedance is addressed in the SAR, dated August 30, 2013. As a result of the
SAR, the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs
will become effective upon their publication in the next revision of the GWDP. As a result of
DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to address this
consecutive exceedance is not necessary and will not be submitted. Until such time as the new
GWCLs become effective, the exceedances will continue to be noted and reported.
• The Total Dissolved Solids ("TDS") concentration exceeded its GWCL in all of the Q2 2015
sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-35
• The manganese concentration exceeded the GWCL in in all of the Q2 2015 sampling events. A
plan and schedule to address this exceedance is not necessary and is not being submitted because
the exceedances are based on the interim GWCLs for MW-35, which have been set at a fraction
of the Groundwater Quality Standards. Background has been established for MW-35 in the
Background Report submitted to DWMRC on May 1, 2014. As a result of the Background
Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated July 15,
2014. The calculated GWCLs will become effective upon their publication in the next revision of
the GWDP. As a result of DWMRC's acceptance of the calculated GWCLs, a plan and schedule
to address this consecutive exceedance is not necessary and will not be submitted. Until such time
as the new GWCLs become effective, the exceedances will continue to be noted and reported. It
should be noted that the exceedances of the interim GWCLs noted herein, do not necessarily
represent impacts to groundwater from Mill activities.
• The uranium concentration exceeded the GWCL in MW-35 in all of the Q2 2015 sampling
events. A plan and schedule to address this exceedance is not necessary and is not being
submitted because the exceedances are based on the interim GWCLs for MW-35, which have
been set at a fraction of the Groundwater Quality Standards. Background has been established
for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a result of the
Background Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated
July 15, 2014. The calculated GWCLs will become effective upon their publication in the next
Letter to Mr. Scott Anderson
August 14, 2015
Page 6
revision of the GWDP. As a result of DWMRC's acceptance of the calculated GWCLs, a plan
and schedule to address this consecutive exceedance is not necessary and will not be submitted.
Until such time as the new GWCLs become effective, the exceedances will continue to be noted
and reported. It should be noted that the exceedances of the interim GWCLs noted herein, do not
necessarily represent impacts to groundwater from Mill activities.
• The gross alpha minus Rn and U ("gross alpha") concentration exceeded the GWCL in MW-35 in
all of the Q2 2015 sampling events. A plan and schedule to address this exceedance is not
necessary and is not being submitted because the exceedances are based on the interim GWCLs
for MW-35, which have been set at a fraction of the Groundwater Quality Standards.
Background has been established for MW-35 in the Background Report submitted to DWMRC
on May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and
accepted by DWMRC in a letter dated July 15, 2014. The calculated GWCLs will become
effective upon their publication in the next revision of the GWDP. As a result of DWMRC's
acceptance of the calculated GWCLs, a plan and schedule to address this consecutive exceedance
is not necessary and will not be submitted. Until such time as the new GWCLs become effective,
the exceedances will continue to be noted and reported. It should be noted that the exceedances of
the interim GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill
activities.
• Field pH has been slightly outside (slightly lower than) the GWCL in the May 2015 and June
2015 monthly sampling events. A plan and schedule to address this exceedance is not necessary
and is not being submitted because the exceedances are based on the interim GWCLs for MW-35,
which have been set at a fraction of the Groundwater Quality Standards. Background has been
established for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a
result of the Background Report, the GWCLs have been calculated and accepted by DWMRC in
a letter dated July 15, 2014. The calculated GWCLs will become effective upon their publication
in the next revision of the GWDP. As a result of DWMRC's acceptance of the calculated
GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not
be submitted. Until such time as the new GWCLs become effective, the exceedances will
continue to be noted and reported. It should be noted that the exceedances of the interim GWCLs
noted herein, do not necessarily represent impacts to groundwater from Mill activities.
1.2 Quarterly Wells with New Exceedances Reported in Q2
No new exceedances for the quarterly wells were noted during Q2 2015.
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 2015 and Q2 2015).
MW-3 was sampled twice during Q2 2015. Successive exceedances are defined in the GWDP as
"concentration of a pollutant in two consecutive samples from a compliance monitoring point exceeds a
GWCL". As noted below, cadmium and zinc exceeded the GWCL in 2 consecutive samples, but not two
consecutive sampling events.
MW-3
Letter to Mr. Scott Anderson
August 14, 2015
Page 7
• Fluoride has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Selenium has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql 2015 sampling
event and the Q2 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Cadmium has exceeded the GWCL for both of the samples collected in Q2 2015. This is the first
consecutive exceedance for cadmium in MW-3. Therefore, a plan and schedule for assessment
will be submitted under separate cover within 30 days of this Exceedance Notice.
• Zinc has exceeded the GWCL for both of the samples collected in Q2 2015. This is the first
consecutive exceedance for zinc in MW-3. Therefore, a plan and schedule for assessment will be
submitted under separate cover within 30 days of this Exceedance Notice.
MW-3A
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql 2015 sampling
event and the Q2 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
• Selenium has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
Letter to Mr. Scott Anderson
August 14, 2015
Page 8
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-12
• Selenium has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
As a result of the SAR, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-18
• Thallium has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012.
In the October 10, 2012 SAR, EFRI requested the removal of GWCLs for the far upgradient wells
(MW-1, MW-18, and MW-19) at the Mill which cannot be impacted by Mill activities. In
correspondence dated April 25, 2013, DWMRC noted "DWMRC agrees with the justification
provided by EFR, that far upgradient wells are not likely to be impacted by current Mill
activities..." and has recommended the removal of GWCLs for MW-18 from the next revision of
the GWDP. A plan and schedule is not necessary because the exceedance is not caused by Mill
activities and was previously discussed in the October 10, 2012 SAR. Until such time as the
GWCLs are removed, the exceedances will continue to be noted and reported.
• TDS has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015 sampling
event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. In the
October 10, 2012 SAR, EFRI requested the removal of GWCLs for the far upgradient wells
(MW-1, MW-18, and MW-19) at the Mill which cannot be impacted by Mill activities. In
correspondence dated April 25, 2013, DWMRC noted "DWMRC agrees with the justification
provided by EFR, that far upgradient wells are not likely to be impacted by current Mill
activities..." and has recommended the removal of GWCLs for MW-18 from the next revision of
the GWDP. A plan and schedule is not necessary because the exceedance is not caused by Mill
activities and was previously discussed in the October 10, 2012 SAR. Until such time as the
GWCLs are removed, the exceedances will continue to be noted and reported.
MW-19
• Nitrate + nitrite has exceeded its GWCL in both the Ql 2015 sampling event and the Q2 2015
sampling events. As mentioned above, a CAP has been submitted and approved and the specified
actions are currently being implemented; therefore a plan to address this consecutive exceedance
is not necessary and is not being submitted.
MW-24
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql 2015 sampling
event and the Q2 2015sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
Letter to Mr. Scott Anderson
August 14, 2015
Page 9
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-27
• The chloride concentration exceeded its GWCL for both the Ql 2015 sampling event and the Q2
2015 sampling event and during previous quarters. As mentioned above, a CAP has been
submitted and approved to address nitrate+nitrite contamination which is expected to address
chloride in groundwater. The actions specified in the CAP are currently being implemented;
therefore a plan to address this consecutive exceedance is not necessary and is not being
submitted.
MW-28
• Chloride has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event and during previous quarters. As mentioned above, a CAP has been submitted and
approved and the specified actions are currently being implemented; therefore a plan to address
this consecutive exceedance is not necessary and is not being submitted.
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql 2015 sampling
event and the Q2 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-29
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql 2015 sampling
event and the Q2 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
MW-32
• Field pH has been slightly outside (slightly lower than) the GWCL for both the Ql 2015 sampling
event and the Q2 2015 sampling event. As mentioned above, site-wide pH issues and trends are
addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the
November 7, 2012 report, the GWCLs have been recalculated and accepted by DWMRC. The
recalculated GWCLs will become effective upon their publication in the next revision of the
GWDP. As a result of DWMRC's acceptance of the recalculated GWCLs, a plan and schedule to
address this consecutive exceedance is not necessary and will not be submitted. Until such time as
the new GWCLs become effective, the exceedances will continue to be noted and reported.
Letter to Mr. Scott Anderson
August 14, 2015
Page 10
• Chloride has exceeded the GWCL for both the Ql 2015 sampling event and the Q2 2015
sampling event and during previous quarters. As mentioned above, a CAP has been submitted and
approved and the specified actions are currently being implemented; therefore 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 single exceedances for the Q2 2015 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 wells listed below will only be sampled during the first and third quarterly
events for the constituents which exceeded their GWCL. The wells listed below will be sampled for all
constituents listed in the GWDP during the second and fourth quarterly events as that is the regularly
scheduled sampling for the semi-annual wells.
• Chloride in MW-1 was above the GWCL in the Q2 sampling event.
• Beryllium in MW-3 was above the GWCL in the Q2 sampling event.
• Sulfate in MW-29 was above the GWCL in the Q2 sampling event.
Relative to accelerated reporting requirements, based on phone conversations with DWMRC on April 5,
2010, 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 semiannually to quarterly. Per teleconferences with DWMRC,
EFRI proposed modified language for the GWDP, Part 1.G.1 on May 25, 2012, to document DWMRC
concurrence with the accelerated reporting and monitoring agreements resulting from the April 5, 2012
teleconference.
Harold Roberts
David Turk
Dan Hillsten
Logan Shumway
Scott Bakken
Yours trul
ENERGY FUELS RESOURCES (USA) INC.
Kathy Weinel
Quality Assurance Manager
cc: David Frydenlund
Table 1 - GWCL Exceedances for Second Quarter 2015 under the August 24, 2012 GWDP
Ql 2010 Results 02 2010 Results Q3 2010 Results Q4 2010 Results
Monitoring Well
(Water Class)
Constituent Exceeding
GWCL
GWCL in
August 24,2012
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 Date
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
MW-11 (Class 11) Manganese (ug/L)
Required Quarterly Sampling Wells
7/20/2010 123
MW-14 (Class III) Field pH (S.U.) 6.5 - 8.5 2/2/2010 4/2.1/2010 6.45 7/20/2010 7.19 10/20/2010 6.6(1
Field pH (S.U.) 6.36
MW-25 (Class III) Cadmium (ug/L) NS 1.26
Uranium (ug/L) 6.5
Nitrate + Nitrite (as N)
(mg/l.) 0.62 0.7
Uranium (ug/L) 58.7 37.5
Chloroform (ug/L) 800
MW-26 (Class III) Chloride (mg/L) 58.31 80 6/16/2010 9/26/2010 64
Field pH (S.U.) 6.36 6.9S 6.60
Dichloromethane
(Methylene Chloride)
(ug/L)
45
Nitrate + Nitrite (as N)
(mg/L) 2.5 15.3 8/24/2010 /5
Chloride (mg/L)
Uranium (ug/L) 8.32 6.82 NS
MW-30 (Class II)
Field pH (S.U.) 7/21/2010
7/27/2010 6.80 (6.82) 8/24/2010 6.73
9/14/2010
9/21/201(1 6.80 (6.84)
Ammonia (mg/L)
Selenium (ug/L)
Nitrate + Nitrite (as N)
(mg/L) 21.7 5/21/201(1 21.1 20 20 20
TDS (mg/L) NS
MW-31 (Class III) Chloride (mg/L) NA
Selenium (ug/L) NS NS
9/13/2010
(9/21/10) NS
Field pH (S.U.I 6/15/2010 7.66 (7.13) 10/19/2010
Sulfate (mg/L) NS 539
Manganese (ug/L) 698
Thallium (ug/l)
MW-35 (Class II)
Gross Alpha minus Rn &
U (pCi/L) NS
Field pH (S.U.)
Selenium (ua/L)
Uranium (ue/L!
NS
Required Semi-Annual Sampling Wells
MW-01 (Class II)
etrahydrofuran (ug/I^
Chloride (mg/L)
Field pH (S.U.)
Sulfate (mg/L)
22.1
6.77 - 8.5
838
7.86 (6.87)
NS
NA
NS
Selenium (ug/L) 37.2 38.8
Field pH (S.U.) 6.14 (6.25) 6.35
MW-03 (Class III) Beryllium (ug/L)
Cadmium (ug/l.) 5/3/2010 NS
Zine (ug/L) 173.19
Sulfate (mg/L)
Nitrate + Nitrite (as N)
(mg/l.) 0.73
Fluoride (Mg/L) 0.71 0.77
NS
Field pH (S.U.) 6.23 (6.24)
MW-3 A (Class 1
Sulfate (mg/L) 3680
Nitrate + Nilrile (as N)
(mg/L)
NS NS
TDS (mg/L)
Selenium (ug/L)
MW-05 (Class II) Uranium (ug/L) 4/26/2010 NS
Selenium (ug/l,) 25.7 27.6
MW-12 (Class III)
Field pH (S.U.)
4/27/2010 NS
6.47 NS
MW-15 (Class III) Selenium (ug/L) 128.7
Field pH (S.U.)
Ql 2010 Results Q2 2010 Results Q3 2010 Results Q4 2010 Results
Monitoring Well
(Water Class)
Constituent Exceeding
GWCL
GWCL in
Current GWDP Ql Sample Date Ql Result Q2 Sample
Date
MW-18 (Class III)
Thallium (ug/l)
Sulfate (mg/l.)
Field pH (S.U.)
TDS (mg/L)
6.25-8.5
3198.77
Q2 Result May Monthly
Sample Date
May
Monthly
Result
June Monthly
Sample Date
NA
NS
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 Q4 Sample
Date Q4 Result
December
Monthly Sample
Date
Required Semi-Annual Sampling Wells, continued
NS
3.64
11/18/2010
3.57
December
Monthly Result
MW-19 (Class III) Field pH (S.U.) 6.78-8.5 6.61 (6.66) 6.93
Nitrate + Nitrite (as N)
(mg/L)
NS
2.83
NS
MW-23 (Class III) Field pH (S.U.) 6.18 NS
Cadmium (ug/L) 4.28 NA
Fluoride (mg/L) 0.36
MW-24 (Class III)
Thallium (ug/L)
NS NS
1.3
9/21/2010
1.09
Field pH (S.U.) 6.5 - 8.5 5.91(5.78)
Nitrate + Nitrite (as N)
(mg/l.) 5.6 5.9
MW-27 (Class III)
Chloride (mg/L) 42 45
Sulfate (mg/L) 462 5/3/2010 NS 11/12/2010
TDS (mg/L) 1160 1110
Gross Alpha minus Rn &
U (pCi/I.) 2.4
Chloride (mg/L) 105 106
Cadmium (ug/L)
MW-28 (Class III) Uranium (ug/L) 4.9 NS 4/19/2010 NS 11/12/2010
Vanadium (ug/L)
Field pH (S.U.) 5.67 5.91 5.72
TDS (mg/L)
MW-29 (Class HI) Sulfate (mg/l.: NS 2770 NS NS NS 2690
Field pH (S.U.) 6.17
NS
Gross Alpha minus Rn &
U(pCi/L) 3.33
MW-32 (Class III) Chloride (mg/L) 35.39 NS NS
Field pH (S.U.) 6.4 - 8.5 6.03 6.33 6.05
Notes:
GWCL values are taken from August 24. 2012 version of GWDP.
NS = Not Required and Nol Sampled
— tveuuiiCU ana
Fxecedanees are shown in yellow
Values in (} parentheses are the field pH measurements for the resampled analyses.
Table 1 - GWCL Exceedances for Second Quarter 2015 under the August 24. 2012 GWDP
Ql 2011 Results Q2 2011 Results Q3 2011 Results Q4 2011 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in
August 24,
2012 GWDP
January 2011
Monthly
Sample Date
January 2011
Monthly Sample
Result
Q12011
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
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
Required Quarterly Sampling Wells
MW-11
(Class 11) Manganese (ug/L) 148 5/10/2011 170 6/15/2011 121 106 10/4/2011
MW-14
(Class 111) Held pH (S.U.) 6.5 - 8.5 l/l 1/201 1 6.37 6.23 10/4/2011 6.71 (6.82)
MW-25
(Class III)
Field pH (S.U.) 6.5 - 8.5 6.44 6.79 6.29
Cadmium (ug/L) 1.5 5/11/2011 6/20/2011
8/3/2011
8/30/11
6.42
(6.54) 6.51
8/30/2012 10/4/2011
Uranium (ug/L) 7.02 6.8 6.74 6.56
Nitrate + Nitrite (as N)
(mg/L) 0.62 0.8 0.3 2.4
Uranium (ug/L) 41.8 57.4 58.9
Chloroform (ug/L) 1200 390 1900 1000 1300 1200
MW-26
(Class HI)
Chloride (mg/l.) 3/15/2011 64 4/1/2011 8/3/201
8/30/11
60 9/7/2011 12/14/2011
Field pH (S.U.) 6.22 6.43 6.07
(6.58)
Dichloromethane
(Methylene Chloride)
(ug/L)
20 7.9
Nilrate + Nitrite (as N)
(mg/L) 2.5 16 16 17 16
Chloride (mg/L) 134
MW-30
(Class II)
Uranium (ug/L) 8.32
4/11/2011 9/7/2011
Field pH (S.U.) 6.50 5.66
10/4/2011
11/29/2011 12/12/2011
6.96 (6.73)
Ammonia (mg/L)
Selenium (ug/L) 36.2 38.3 38.7 36.6
Nitrate + Nitrite (as N)
(mg/L) 20 22 21 21
1370
MW-31
(Class III)
Chloride (mg/L)
Selenium (ug/L) 65.2 5/10/201 145 148 148 145 11/8/2011
(11/29/12)
Field pH (S.U. 7.43 7.01 (7.34)
Sulfate (mg/L) 532 541 539
Manganese (ug/l.) 248 369 348 267 283
Thallium (ug/l) NA 0.52
MW-35
(Class II)
Gross Alpha minus Rn
& U (pCi/L) 3.75
2/15/2011 NS 4.4
Field pll (S.U.) 6.49 6.40
Selenium (ug/L)
Uranium (ug/L) 12.7 NA NA 24.2 18.3
Required Semi-Annual Sampling Wells
MW-01
(Class II)
Tetrahydrofuran (ug/L)
Chloride (mg/L)
Field pH (S.U.)
Sulfate (mg/l.)
11.5
22.1 NS
4/19/201
4/11/201 1 rrm
NA
NA
NA
NS
NA
NS
7.08 (7.51)
NS
Selenium (ug/L) 37 45.4 46.7
Field pH (S.U.) 6.5 - 8.5 6.46 6.53 (6.83)
MW-03
(Class III)
Beryllium (ug/L)
Cadmium (ug/L) 4.67 2/15/2011 NS 8/10/2011 NS
Zine (ug/L) 173.19 NA
Sulfate (mg/L) 3663 NA
Nilrate + Nitrite (as N)
(mg/L) 0.3
Fluoride (Mg/L) 0.68 0.69
Field pH (S.U.) 6.19 6.5 (6.92)
MW-03A
(Class III)
Sulfate (mg/L) 3730 3350
Nitrate + Nitrite (as N)
(mg/l.) 1.3 4/13/2011 8/11/2011 NS
TDS (mg/L) 5805
Selenium (ug/L) 89 95
MW-05
(Class 11) Uranium (ug/L: NS 29.5 NS NS
MW-12
(Class III
Selenium (ug/L) 25 39.0 35.4
Field pH (S.U.) 6.5 - 8.5 6.7 (6.97)
MW-
(Class
Selenium (ug/L)
Field pHlS.U.) 6.62 - 8.5
Ql 2011 Results Q2 2011 Results Q3 2011 Results Q4 2011 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in
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 20U
Sample
Date
Q3 20U
Result
September
2011
Monthly
Sample Date
September
2011 Monthly
Result
Q4 2011
Sample Date
Q4 20U
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-18
(Class III)
Thallium (ug/l)
Sulfate (mg/L)
Field pH (S.U.)
TDS (mg/L)
1770
3.74
3250
NA
NS
NA
8/10/2011
9/21/11
4.0 3.39
5.95
(6-30)
3190
10/11/2011
3.83
2020
6.55 (6.63)
3220
NA
NA
NA
NA
MW-19
(Class III)
Field pH (S.U.) 6.78-8.5
Nitrate + Nitrite (as N)
(mg/L)
NS
6.88 (7.02)
4/5/2011
2.83 2.6 4.0
MW-23
(Class III) Field pH (S.U.) 6.5 - 8.5 6.13 4/5/2011 6.38 10/6/2011 6.56 (6.77)
Cadmium (ug/I.) 2.5 2.78
MW-24
(Class III)
Fluoride (mg/L;
Sulfate (mg/L) 2903 NA
Thallium (ug/I.)
4/5/2011
1.07
NS 10/11/2011
Field pH (S.U.) 5.73 6.45
Nitrate + Nitrite (as N)
(mg/L) 6.4
MW-27
(Class III)
Chloride (mg/L) 43
10/5/2011
TDS (mg/L) 1190 1110
Gross Alpha minus Rn
&U(pCi/l.)
Chloride (mg/L) 114
MW-28
(Class III)
Cadmium (ug/I.)
Uranium (ug/I.) 10/5/2011
Vanadium (ug/I.)
Field pH (S.U.) 6.1 -8.5 6.01 «.97(6.1I)
NA
TDS (mg/L)
MW-29
(Class III)
Sulfate (mg/L) 2946 NS 2850
Field pH (S.U.) 6.46 - 8.5
NA
NA
NS
MW-32
(Class III)
Gross Alpha minus Rn
& U (pCi/L) 4.6
Chloride (mg/L) 35.39 8/2/201
8/30/1 1 NS 10/3/2011
Field pH (S.U.) 6.14 6.10
(6.20)
NA NS
GWCL values are taken from August 24.
version of GWDP.
NS = Not Required and Not Sampled
Fxeeedanees are shown in yellow
Values in () parentheses are Ihe field pH measurements for the resampled analyses.
Table 1 - GWCL Exceedances for Second Quarter 21)15 under Ihe August 24. 2012 GWDP
Ql 2012 Results Q2 2012 Results Q3 2012 Results Q4 2012 Results
Monitoring Well
(Water Class)
Constituent
Exceeding GWCL
GWCL in
August 24,
2012 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
April 2012
Monthly
Sample Date
April 2012
Monthly
Result
Q2 2012
Sample
Date
Q2 2012
Result
June 2012
Monthly
Sample
Date
June 2012
Monthly
Result
Q3 2012
Sample
Date
Q3 2012
Result
August
2012
Monthly
Sample
Date
August
2012
Monthly
Result
September
2012
Monthly
Sample
Date
September
2012
Monthly
Result
October
2012
Monthly
Sample Date
October
2012
Monthly
Result
Q4 2012
Sample Date
Q4 2012
Result
December
2012
Monthly
Sample Date
Required Quarterly Sampling Wells
MW-11 (Class II) Manganese (ug/l.) 131.29 1/26/2012 102 2/13/2012 3/13/2012 5/S/201 127 135 9/19/2012 138
MW-14 (Class III) Field pH (S.U.) 6.5 - 8.5 1/24/201 6.36 2/21/2012 6.57 3/14/2012 4/12/2012 6.58 9/18/201: 7.08
Field pH (S.U.) 6.5-8.5 6.73 6.99 6.88 6.47
MW-25 (Class III) Cadmium (ug/L) 1.5 1/25/2012 2/14/2012 1.33 8/6/2012 9/18/201: 12/24/2012
Uranium (ug/I.) 6.93 6.52 7.6 6.61
Nitrate + Nitrite (as
N)(mg/L) 0.62 1.9 2/15/2012 2.3 7/11/2012 1.9 3.5
Uranium (ug/L; 64.6 59.4 64.9
Chloroform (ue/L)
MW-26 (Class III) Chloride (mg/L) 58.31 2/15/2012 1700 2400 970 2200 4020
82
Field pFHS.U.) 6.74 - 8.5
3T572TTTT
2/21/2012
3»i»()17
6.72 (6.91)
(6.71)
5/7/2012
6/26/2012 6/19/2012 85 78 78 11/15/2012 12/24/2012
6.39 7.00(7.01) 7/11/2012
8/16/2012
7.10
(6.80) 6.60
Dichloromethane
(Methylene Chloride)
(ug/L)
2/15/2012 24 9.8
Nitrate + Nitrite (as
N) (mg/L) 2.5 15 18 18.5
Chloride (mg/L) 130 135
Uranium (ug/l.) 8.32 NS 7.42
MW-30 (Class II) 6/18/2012 12/26/2012
Field pH (S.U.) 7.05
Ammonia (mg/I.)
Selenium (ug/L) 34 35 39.5 38.5 38.4 41.9
Nitrate + Nitrite (as
N) (mg/L) 21 21 21.6 21 21
TDS (mg/I.) 1380 1410 1460
MW-31 (Class III) Chloride (mg/L; 155 150 152
Selenium (ug/L)
6/18/2012
6/29/2012 7/9/201 161 175 172
76.9 12/18/2012
Field pH (S.U.) 7.28 (7.63)
Sullale (mg/I.) 532 571
Manganese (ug/L) 269 277 258 253 241
Thallium (ug/l) 0.65 0.71 0.59 0.54 0.517 0.554
MW-35 (Class II)
Gross Alpha minus
Rn&U(pCi/I.) 3.75 6.5 6.2
1/24/2012 2/14/2012 3/13/2012 4/10/2012
4.9 4.2 5.4
10/23/201
Field pH (S.U.) 6.35 6.48 6.84 6.43
Selenium (ug/I.) 12.5 19.7 19.0
Uranium (ug/I.) 16.1 24.9 22.4 22.2 22.9 22.4 21.8
Required Semi-Annual Sampling Wells
retrahydrofuran (ug/I
MW-01 (Class II) Chloride (mg/I.)
Field pH (S.U.)
Sullale (mg/l.)
22.1 NS NS 5/1/201 NS 11/27/201
846
Selenium (ug/I.) 37 51.1
Field pH (S.U.) 6.5 - 8.5
MW-03 (Class III) Beryllium (ug/L)
Cadmium (ug/L) 4.67 NS 2/29/2012 NS NS 11/28/2012
/ine (ug/L)
Sulfate (mg/I.) 3663 2340
Nitrale + Nitrite (as
N) (mg/L)
Fluoride (Me/I.) 0.86 0.96 1.26
Field pH (S.U.) 6.35
MW-03A (Class Sulfate (mg/L)
Nitrate + Nitrite (as
N) (mg/I.)
NS 5/15/2012 1.31 NS
Selenium (ug/L) 99.3
MW-05 (Class II) Uranium (ug/I.) 7/16/201
Selenium (ug/L) 25 NA 23.0
MW-12 (Class III) Field pH (S.U.) 6.5 - 8.5 7/17/2012
MW-15 (Class III) Selenium (ua/L)
Field pHtS.U.) 6.62 - 8.5 5/9/2012 152
Ql 2012 Results Q2 2012 Results Q3 2012 Results Q4 2012 Results
Monitoring 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
April 2012
Monthly
Sample Date
April 2012
Monthly
Result
Q2 2012
Sample
Date
Q2 2012
Result
June 2012
Monthly
Sample
Date
June 2012
Monthly
Result
Q3 2012
Sample
Date
Q3 2012
Result
August
2012
Monthly
Sample
Date
August
2012
Monthly
Result
September
2012
Monthly
Sample
Date
September
2012
Monthly
Result
October
2012
Monthly
Sample Date
October
2012
Monthly-
Result
Q4 2012
Sample Date
Q4 2012
Result
December
2012
Monthly
Sample Date
December
2012
Monthly
Result
Required Semi-Annual Sampling Wells, continued
MW-18 (Class 111)
Thallium (ue/l)
Sullale (mg/l.)
Field pHIS.U.)
TDS (mg/l.) 3198.77
2/27/2012
3230 N A
3.5/
3280 N A
3.73
3220
11/26/2012 NS
MW-19 (Class III) Field pH (S.U.) 6.78-8.3 NA 6.71
Nilrale + Nilrile (as
N)(mg/I.)
NS NS 5/16/2012 NS NS
2.83 3.9 3.7 3.96
MW-23 (Class III) Field pH (S.U.)
Cadmium (ug/l.)
Fluoride (mg/I.)
MW-24 (Class III) Sullale ime/l ) 2903 NS 2/23/2012 NS NS
Thallium (ug/I.)
Field pH (S.U.) 6.03 6.21
Nilrale + Nilrile (a
N) (mg/L) 6.4 6.2 6.7 NA
MW-27 (Class III) Chloride (mg/I.) 44.2
Sullale (mg/l.) 11/13/2012
TDS (mg/I.) 1140
Gross Alpha minus
Rn & V IpG/l.) 2.3
Chloride (ma/I.) 7/16/201.
8/1/2012
Cadmium (ua/I.
MW-28 (Class III) Uranium (ua/I.) 11/14/2012
Vanadium (ue/I.
Field pH (S.U.) 6.1 -8.5 6.22 7/16/2012
8/1/2012
6.38 5.98
TDS (mg/I.) 4600 8/1/2012 4420
MW-29 (Class III) Sullale (me/1.) 5/8/2012
Field pH (S.U.) 7.12 7/16/2012
8/1/2012
6.68
(6.45)
NS
Gross Alpha minus
Rn & U (pCi/I.) 3.33
MW-32 (Class III) Chloride (mg/l.) 35.39 NS NS
Field pH (S.U.) 6.4 - 8.5
Notes:
GWCL values are laken from August 24. 2012 version of
GWDP.
NS = Nol Required and Not Sampled
Fxeeedanees are shown in yellow
Values in () parenlheses are Ihe Held pH measurements (or Ihe resampled analysi
Table I - GWCL Exceedances for Second Quarter 21115 under Ihe Augusi 24 2012 CVVDP
Ql 2013 Results Q2 2013 Results Q3 2013 Results Q4 2013 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in August 24.
2012 GWDP
January 2013
Monthly Sample
Date
January
2013
Monthly
Result
Ql 2013
Sample
Date
Ql 2013
Result
March
2013
Monthly
Sample
Date
March 2013
Monthly
Result
April 2013
Monthly-
Sample Date
April 2013
Monthly
Result
Q2 2013
Sample
Date
Q2 2013
Result
June 2013
Monthly
Sample
Date
June 2013
Monthly-
Result
Q3 2013
Sample
Date
Q3 2013
Result
August 2013
Monthly
Sample
Date
August
2013
Monthly
Result
September
2013
Monthly
Sample
Date
September
2013 Monthly
Result
October
2013
Monthly
Sample Date
October
2013
Monthly
Result
Q4 2013
Sample Date
Q4 2013
Result
December
2013 Monthly
Sample Date
December
2013 Monthly
Result
Required Quarterly Sampling Wells
MW-11 (Class
11) Manganese (ug/L) 2/20/2013 164 181 5/14/2013 144 6/25/2013 135 7/10/2013 158 134 10/22/2013 129 11/19/2013
MW-14 (Class
111) Field pH (S.U.) 6.48 6.52 3/20/2013 7/11/2013 6.48 6.77 11/20/2013
MW-25 (Class Field pH (S.U.) 6.32 6.74 6.62
Cadmium (ug/L) 1/22/2013 1.35 5/14/2013 1.52 10/22/2013 1.35
Uranium (ug/L) 6.5 7.13
Nitrate + Nilrile (as N)
(mg/L) 0.62 1.66 1.73 2.01 3.042.11* 3.60
Uranium (ug/L) 65.7 57.8 64.3 71.3 70 58.8
Chloroform (ug/I.) 70 1340 1680 2110 4170
MW-26 (Class
III)
Chloride (mg/L) 58.31 1/24/2013 73.6 70.4 5/23/2013 63.1 6/5/2013
6/25/2013
87.8 77.9* 70.8 77.3 10/23/2013
Field pH (S.U.) 6.74 - 8.5 6.70
Diehloromethane
(Methylene Chloride)
(ug/L)
6.49 10.2 52.4*
[12.11 42.4 29.8
Nilrate + Nitrite (as N)
(mg/l.) 21.4 18.8 16.1 16.9 19.7
Chloride (mg/I.) 128 130
MW-30 (Class
II)
Uranium (ug/I.; 8.36
4/17/2013 5/15/2013 9/18/2013
Field pH (S.U.) 6.87
Ammonia (mg/L)
Selenium (ug/L) 37.2 42.3 39 36.5 39.5 36.6
Nilrale + Nitrite (as N)
(mg/I.) 22.8 19.3 23.8 20.0 21.7 21.2 23.9
TDS (mg/L) 1320 1270 1420 1510 1440
MW-31 (Class
III)
Chloride (mg/L)
Selenium (ug/L) 1/22/2013 176
NS 81.8 72.9 5/1.3/2013 75.9 6/24/2013 179 188 174
73.7 73.2 72.6 74.5
Field pH (S.U.) 6.5 - 8.5 6.37 7.36
Sulfate (mg/l.) 611 644 630 659 666 637
Manganese (ug/L) 200 246 243 250 262 251
Thallium (ug/l) 0.505
MW-35 (Class
II)
Gross Alpha minus Rn &
U(pCi/l.) 6.62 5.09 9.51
4/17/2013
5.70 3.92
8/19/2013
5.39
12/17/2013
Field pH (S.U.) 6.5 - 8.5 6.43 7.02
Selenium (ug/I.) 12.5 22.6 13.6
Uranium (ug/l.) 21.3 22.1 20.0 22.0 19.3 23.0
Required Semi-Annual Sampling Wells
MW-01 (Class
II)
Telrahydrofuran (ug/L)
Chloride (mg/I.)
Field pH (S.U.)
Sullale (mg/I.)
6.77 - 8.5
12.6
5/21/2013
3.26
839
NS NS
Selenium (ue/L) 51.8 52.0
Field pH (S.U.; 6.20 6.46
MW-03 (Class Beryllium (ug/L)
Cadmium (ug/L) NS <0.5 NS
/ine ug/l ) 173.19 20.3
Sulfate (mg/I.) 3760
Nilrate + Nilrile (as N)
(mg/I ] 0.73
Fluoride (Mg/I.) 0.902 1.18 1.28
Field pH (S.U.) 6.5 - 8.5
MW-03A (Class
III)
Sulfate (mg/L) 3640 3670
Nitrate + Nilrile (as N)
(mg/I.)
NS 1.22 5/23/2013 NS
TDS (mg/l.) 6020
Selenium (ug/I.)
Uranium (ug/I.) 7.5 36 7/18/2013
MW-12 (Class
III)
Selenium (ug/I.) 20.5
Field pH (S.U.) NS 7/17/2013
6.60
MW-15 (Class
III)
Selenium (ug/L)
Field pH(S.U.) 5/15/2013
6.61
Ql 2013 Results Q2 2013 Results Q3 2013 Results Q4 2013 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in Current
GWDP
January 2013
Monthly Sample
Date
January
2013
Monthly
Result
Ql 2013
Sample
Date
Ql 2013
Result
March
2013
Monthly
Sample
Date
March 2013
Monthly
April 2013
Monthly
Sample Date
April 2013
Monthly
Result
Q2 2013
Sample
Date
Q2 2013
Result
June 2013
Monthly
Sample
Date
June 2013
Monthly
Result
Q3 2013
Sample
Date
Q3 2013
Result
August 2013
Monthly
Sample
Date
August
2013
Monthly
Result
September
2013
Monthly
Sample
Date
September
2013 Monthly
Result
October
2013
Monthly
Sample Date
October
2013
Monthly
Result
Q4 2013
Sample Date
Q4 2013
Result
December
2013 Monthly
Sample Date
December
2013 Monthly
Result
Required Semi-Annual Sampling Weils, continued
MW-18 (Class
III)
Thallium (ug/l)
Sulfate (mg/I.)
Field pH (S.U.)
TDS (mg/I.) 3198.77
3.26
NS NS
NA 2.81
6.45 NS NS
2000
6.38 NS
MW-19 (Class
III)
Field pH (S.U.)
Nitrate + Nitrite (as N)
(mg/L)
5/20/2013
2.83 4.21 3.70
MW-23 (Class
III) Field pH (S.U.) 6.37 NS NS 6.6 I NS 12/18/2013 7.21
Cadmium (ug/I.) 6.72
MW-24 (Class
III)
Fluoride (mg/I.) 0.36
Sulfate (mg/I.) NS
Thallium (ug/I.)
5/22/2013
0.618
Field pH (S.U.) 6.5-8.5 6.29
NS
Nilrate + Nitrite (as N)
(mg/l.) 7.94 7.09
MW-27 (Class
III)
Chloride (mg/I.) 38 44.2 45.0
Sulfate (mg/I.) 497
TDS (mg/L) 1140 1110 1100
Gross Alpha minus Rn &
U (pCi/L)
Chloride (mg/I.) 110 107
MW-28 (Class
III)
Cadmium (ug/I.) 5.2
Uranium (ug/I.) NS 7/17/2013 NS 12/4/2013 3.34
Vanadium (ug/L: 30
Field pH (S.U.) 6.63
TDS (mg/L)
MW-29 (Class Sulfate (mg/L) 3/6/2013 NS 2750
Field pH (S.U.) 6.46 - 8.5 6.37 6.35
MW-32 (Class
III)
Gross Alpha minus Rn &
U (pCi/L) 3.33 3.72
Chloride (mg/I.) 35.39 2/19/2013 7/9/2013
Field pH (S.U.) 6.4 - 8.5
GWCL values are taken from Augusi 24. 2012 version of GWDP.
NS = Not Required and Nol Sampled
ills — ivcquiieu
Kxceedanecs are shown in yellow
Values in () parentheses are the field pH measurements for the resampled analyses.
Tablr I - GYVCL Kxceedances for Second Quarter 2015 under the August 24. 2012 GWDP
Ql 2014 Results Q2 2014 Results Q3 2014 Results 04 2014 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in August
24, 2012 GWDP
January 2014
Monthly Sample
Date
January
2014
Monthly
Result
February
2014
Monthly
Sample Date
February
2014
Monthly
Result
Ql 2014
Sample
Date
Q12014
Result
April 2014
Monthly
Sample
Date
April 2014
Monthly
Result
May 2014
Monthly
Sample
Date
May 2014
Monthly
Result
Q2 2014
Sample
Date
Q2 2014
Result
July 2014
Monthly
Sample
Date
July 2014
Monthly
Result
August
2014
Monthly
Sample
Date
August
2014
Monthly
Result
Q3 2014
Sample
Date
Q3 2014
Result
October
2014
Monthly
Sample
Date
October
2014
Monthly
Result
Q4 2014
Sample Date
Q4 2014
Result
December
2014 Monthly
Sample Date
December
2014 Monthly
Result
Required Quarterly Sampling Wells
MW-11 (Class Manganese (ug/I.; 141 136 128 6/3/2014 139 139
MW-14 (Class
HI) Field pH(S.U.) 6.16 3/11/2014 5/13/2014 6/3/2014 6.25
MW-25 (Class
III)
Field pH (S.U.) 6.5 - 8.5 6.10 6.27 6.49
Cadmium (ug/I.) 1/7/2014 2/13/2014 1.29 1.51 1.30 9/3/2014
Uranium (ug/l.)
Nitrate + Nitrite (as N)
(mg/I.) 2.42 2.12 1.20 2.0 1.00 1.09
Uranium (ug/I.) 81.7 72.2 96.0 90.6 74.4 48.4
Chloroform (ug/L) 2800 2330 2200 1520
MW-26 (Class
HI)
Chloride (mg/I.) 1/8/2014 69.7 61.0 4/30/2014 62.1 8/20/2014 59.0
Field pH (S.U.)
12/10/14
12/15/14
6.74 - 8.5 6.80 6.50 7.19 6.60 7.28 6.09
Dichloromethane
(Methylene Chloride)
(ug/I.)
6.52 25.8 5.54 10.2 43.3 7.34
Nitrate + Nitrite (as N)
(mg/L) 20.3 18.4 18.3 17.9 19.4 13.8 16.8
Chloride (mg/I.) 128 144 140 136
MW-30 (Class
H)
Uranium (ug/l. 9.82 7.70
4/23/2014 8/20/2014 11/10/2014 12/10/2014
Field pH (S.U.) 6.56
Ammonia (mg/I.) NA
Selenium (ug/I.) 35.6 35.8 37.0 35.4 48.5 53.6 38.9
Nitrate + Nitrite (as N)
(mg/L) 24.0 20.6 23.3 23.1 15.2 18.9
TDS (mg/I.) 1320 1490 1520 1400 1420 1520
MW-31 (Class
III)
Chloride (mg/L)
Selenium (ug/L; 1/7/2014 194 197
77.2 85.4 5/13/2014 200
77.9 82.8 9/3/2014 210
78.9 73.0 12/9/2014
Field pH (S.U.) 6.5 - 8.5 7.13 6.45 7.45 6.69
Sulfate (mg/I.) 558 639 620 560
Manganese (ug/I.) 200 204 202 228
Thallium (ua/1)
MW-35 (Class
II)
Ciross Alpha minus Rn t
U (pCi/L) 3.75 4.12 3.98 4.33
3/11/14 7/29/2014
3.93
Field pH (S.U.) 6.5 - 8.5 6.07 6.32
Selenium (ug/l.) 12.5 14.1 13.9 13.2 31.4
Uranium (ug/I.; 20.6 26.9 23.9
Required Semi-Annual Sampling Wells
MW-01 (Class
II)
Tetrahvdroluran (ug/l.)
Chloride (mg/I.)
Field pH (S.U.)
Sulfate (mg/I.) 838
NS
NA
NS 11/17/2014
920
Selenium (ug/I.) 69.5 94.0
Field pH (S.U.) 6.23 6.13
MW-03 (Class
III)
Beryllium (ug/I.) NA
Cadmium (ug/l.) 2/26/2014 NS
Zine (ug/L) 173.19
Sulfate (mg/I.) 3663
Nitrate + Nitrite (as N)
(mg/I.) 0.73
Fluoride (Mg/I.) 0.771 1.02 1.0
Field pH (S.U.) 6.5 - 8.5 6.40 6.41
MW-03A (Class Sulfalc (mg/L) 3640 377*
Nitrate + Nitrite (as N)
(mg/I.)
NS NA NS
TDS (mg/L)
Selenium (ug/L) 129
MW-05 (Clasi
II) Uranium (ug/L) 7.5 NS 2/12/2014 6/4/2014 2.42
MW-12 (Class Selenium (ug/L)
Field pH (S.U.)
NS 2/12/2014 6.13 7.10 6.47
MW-15 (Class
111)
Selenium (ug/l.)
Field pH (S.U.) NS
6.38
Ql 2014 Results Q2 2014 Results 03 2014 Results Q4 2014 Results
Monitoring
Well (Water
Class)
Constituent Exceeding
GWCL
GWCL in Current
GWDP
January 2014
Monthly Sample
Date
January
2014
Monthly
Result
February
2014
Monthly
Sample Date
February
2014
Monthly
Result
Ql2014
Sample
Date
Ql 2014
Result
April 2014
Monthly
Sample
Date
April 2014
Monthly
Result
May 2014
Monthly
Sample
Date
May 2014
Monthly
Result
Q2 2014
Sample
Date
Q2 2014
Result
April 2014
Monthly
Sample
Date
April 2014
Monthly
Result
May 2014
Monthly
Sample
Date
May 2014
Monthly-
Result
Q3 2014
Sample
Date
Q3 2014
Result
October
2014
Monthly
Sample
Date
October
2014
Monthly
Result
Q4 2014
Sample Date
Q4 2014
Result
December
2014 Monthly
Sample Date
Required Semi-Annual Sampling Wells, continued
MW-18 (Class
III)
Thallium (ug/l)
Sulfate (mg/L)
Held pH (S.U.)
TDS (mg/L) 3198.77
2/19/2014
2.77
6.16
NA
2020
3260
NS NS
2.7
NS
MW-19 (Class
III)
Held pH (S.U.) 6.78-8.5 6.29 6.46
Nilrate + Nitrite (as N)
(mg/I.)
NS NS 9/11/2014
2.83 3.82 NA
MW-23 (Class Held pH (S.U.) 3/5/2014 NS
Cadmium (ug/L) 5.92 2.91
MW-24 (Class
III)
Huoride (mg/L) 0.36 NA 0.4
Sulfate (mg/L)
Thallium (ug/I.) 1.85 1.23
NS 9/17/2014 3120
Held pH (S.U.) 6.5 - 8.5 6.07 5.09
Nilrale + Nitrite (as N)
(mg/I.) 7.35 6.30
MW-27 (Class
III)
Chloride (mg/I.) 47.0 42.6
Sulfate (mg/I.: 2/25/2014 484
TDS (mg/I.) 1090
Gross Alpha minus Rn &
U (pCi/1.)
NS
Chloride (mg/L) 114
MW-28 (Class
Cadmium (ug/L) 5.2
Uranium (ug/L) 2/26/2014 61.3 NS 10.6 21.2
Vanadium (ug/l.) 30
Held pH (S.U.) 6.1-8.5 6.01 5.79
TDS (mg/l.)
MW-29 (Class
III)
Sullale (mg/L) NS 6/3/2014 NS
Held pH (S.U.) 6.46 - 8.5 NA 6.11
MW-32 (Class
III)
Gross Alpha minus Rn &
U (pCi/L) 3.33
Chloride (mg/L) 35.39 NS 2/11/2014 NS
Held pH (S.U.) 6.4 - 8.5
3.69
6.17
11/5/2014
6.08
NS
GWCL values are taken from Augusi 24, 2012 version of
GWDP.
NS = Nol Required and Not Sampled
NR = Required and Nol Reported
NA = Nol Applicable
Exceedances are shown in yellow
Values in () parcnlhescs are the field pH measurements for the resampled analyses.
Table I - GWCL Exceedances for Second Quarter 2015 under the August 24. 2012 GWDP
Ql 2015 Results
Monitoring WeU
(Water Class)
Constituent Exceeding
GWCL
GWCL in
August 24,
2012 GWDP
January 201S
Monthly
Sample Date
January 2015
Monthly
Result
Ql 2015
Sample Date
Ql 2015
Result
March 2015
Monthly
Sample Date
March 2015
Monthly
Result
Q2 2015
Sample Date
Q2 2015
Result
May 2015
Monthly
Sample Date
May 2015
Monthly
Result
June 2015
Monthly
Sample
Date
June 2015
Monthly
Result
Sample
Frequency
MW-11 (Class II) Manganese (ug/L)
Required Quarterly Sampling Wells
2/3/2015 138 3/3/201 149 Quarterly
MW-14 (Class III) Field pH (S.U.) 6.49 6.44 4/8/2015 Quarterly
Field pH (S.U.) <U2 6.52
MW-25 (Class III) Cadmium (ug/L) 1/20/2015 2/4/2015
6/1/2015
6/23/2015 6.59, 6.53 Quarterly
1.27 1.38
Uranium (ug/I.) 6.5 6.54 6.81 6/23/2015 Quarterly
Quarterly
Nitrale + Nitrite (as N)
(mg/L) 2.68 Quarterly
Uranium (ug/L) 78.1 72.6 Quarterly
Chloroform (ug/l.) 70 3570 1160 2610 Quarterly
MW-26 (Class III) Chloride (mg/I.) 58.31 1/21/2015 59.9 2/11/2015 77.2 5/12/2015 61.4 60.8 Quarterly
Field pH (S.U.) 6.74 - 8.5 6.25 6.20 6.60 6.46 6/3/2015
6/24/2015 6.58, 6.20 Quarterly
Diehloromc thane
(Methylene Chloride)
(ug/l.)
6.42 5.89 9.38 Quarterly
Nilrate + Nitrite (as N)
(mg/I.) 19.5 14.9 17.3 Quarterly
Chloride (mg/L) 128 142 145 Quarterly
Uranium (ug/I.) 8.32
MW-30 (Class I 5/12/2015
Quarterly
Field pH (S.U.) 6.41 6.32 6.67 6/2/2015
6/24/2015 Quarterly
Ammonia (mg/l.) 0.0824
Selenium (ug/l.) 37.2 40.9 38.0 37.3
6/24/2015 Quarterly
Quarterly
Nitrate + Nilrite (as N)
(mg/l.) 20.9 18.7 19.8 Quarterly
TDS (mg/L) 1320 1680 1700 1630 Quarterly
MW-31 (Class III) Chloride (mg/L) 226 209 Quarterly
Selenium (ug/l.) 75.7 71.6 74.4 Quarterly
Field pH (S.U.) 6.5 - 8.5 6/1/2015
6/23/2015 Quarterly
Sulfate (mg/L) 669 623 691 Quarterly
Manganese (ug/L) 237 207.0 Quarterly
Thallium (ug/l) Quarlerly
MW-35 (Class II)
Gross Alpha minus Rn &
U (pCi/I.) 6.86 5.61 3.81 4.25
4/9/2015 5/12/2015
Quarlerly
Field pH (S.U.) 6.26 6.46 6/2/2015
6/23/2015 6.50, 6.41 Quarterly
Selenium (ug/l.) 14.2 26.6
Jraniutn (ug/L) 21.8 20.6 24.4 6/23/2015 Quarterly
Quarterl)
Required Semi-Annual Sampling Wells
MW-01 (Class II)
Telrahydrofuran (ug/l.)
Chloride (mg/l.)
Field pH (S.U.)
Sulfate (mg/L)
22.1
838
1.63
NS
Semi-Annually
Scmi-Annually
Semi-Annually
Semi-Annually
Selenium (ug/l.) 61.1 4/23/2015
5/20/2015 81, 61.7 Semi-Annually
Field pHIS.U.) 6.5 - 8.5 6.12
4/23/2015
4/29/2015
5/20/2015
6.18, 6.51,
6.23 Semi-Annually
MW-03 (Class III) Beryllium (ug/L)
Cadmium (ug/I.) 4.67 2/11/2015
Zine (ug/I.)
4/23/2015
5/20/2015
1.44, 2.08 Semi-Annually
5.03,14.2 Semi-Annually
238, 373 Semi-Annually
Sulfate (mg/L.) 3700 Semi-Annually
Nitrale + Nitrite (as N)
(mg/l.) Semi-Annually
Fluoride (mg/L) 1.08 1.00 Semi-Annually
Field pH (S.U.) 4/23/2015
4/29/2015 Semi-Annually
MW-03A (Class
III)
Sulfalc (mg/I.) 3720 Semi-Annually
Nitrale + Nitrite (as N)
(mg/L)
NS Semi-Annually
TDS (mg/L) 5805 Semi-Annually
Selenium (ug/L) 94.1 Semi-Annually
MW-05 (Class II) Uranium (ug/I.) 2/10/2015 NS 4/21/2015 Semi-Annually
Selenium (ug/L) 30.0 29.4 Semi-Annually
MW-12 (Class III)
Field pH (S.U.) 6.5 - 8.5
2/9/2015
6.33 4/21/201
4/28/201
NS
Semi-Annually
MW-15(ClassI Selenium (ug/L) 128.7
Field pH (S.U.) 6.62 - 8.5 2/4/2015 Semi-Annually
6.50 Semi-Annually
Ql 2015 Results Q2 2015 Results
Monitoring Well
(Water Class)
Constituent Exceeding
GWCL
GWCL in
August 24,
2012 GWDP
January 2015
Monthly
Sample Date
January 2015
Monthly
Result
Ql 2015
Sample Date
Ql2015
Result
March 2015
Monthly-
Sample Date
March 2015
Monthly
Result
Q2 2015
Sample Date
Q2 2015
Result
May 2015
Monthly-
Sample Date
May 2015
Monthly
Result
June 2015
Monthly
Sample
Date
June 2015
Monthly
Result
Sample
Frequency
Required Semi-Annual Sampling Wells, continued
MW-18 (Class III)
Thallium (ue/l)
Sulfate (mg/L)
Field pH (S.U.)
TDS (mg/L) 3198.77
6.27
3240
NS
NA
NS
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
MW-19 (Class in) Field pH (S.U.) 6.78-8.5 6.45
Nitrate + Nitrite (as N)
(mg/L)
NS
2.83
NS
Semi-Annually
Semi-Annually
MW-23 (Class III) Field pH (S.U.) NS Semi-Annually
Cadmium (ug/L) 3.31
Fluoride (mg/L) 0.36
MW-24 (Class III) Sulfate (mg/I.)
Thallium (ug/I.)
NS
Field pH (S.U.) 6.5 - 8.5 5/28/2015
6/24/2015 5.39, 5.98
NS
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Nitrate + Nitrite (as N)
(mg/I.) 15.27
MW-27 (Class III) Chloride (mg/L) 44.2 47.6
Sulfate (mg/L) 2/9/2015 NS
TDS (mg/L)
Gross Alpha minus Rn &
U (pCi/L) NA
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Chloride (mg/L) 130 125
Cadmium (ug/I.) 5.2 4/21/2015
MW-28 (Class III) Uranium (ug/L) 2/9/2015 6.13 NS
Vanadium (ug/L) 30
Field pH (S.U.) 5.86 4/21/2015
4/27/2015 6.08, 6.17
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
Semi-Annually
TDS (mg/L) 4400
MW-29 (Class III) Sulfate (mg/L) 4/30/2015 2960
Field pH (S.U.) 6.42 6.36
Semi-Annually
Semi-Annually
Semi-Annually
Gross Alpha minus Rn &
U (pCi/L) 3.33
MW-32 (Class III) Chloride (mg/I.) 35.39 NS NS
Field pH (S.U.) 6.4 - 8.5 2/9/2015
Semi-Annually
Semi-Annually
Semi-Annually
Notes:
GWCL values are taken from August 24, 2012 version of
GWDP.
NS = Nol Required and Not Sampled
NR = Required and Not Reported
NA = Not Applicable
Kxceedanccs are shown in yellow
Values in () parenlheses are Ihe field pH measuremenls for ihe resampled analyses.