DRC-2019-003620 - 0901a06880a264ee

Y FUELS
Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140
www.energyfuels.corn
Div of Waste Management April 17, 2019 and Radiation Control
APR 2 2 2019
--PiZ —Xic?-603620
Re: State of Utah Ground Water Discharge Permit No. UGW370004
White Mesa Uranium Mill — Notice Pursuant to Part I.G.1 (a)
Dear Mr. Howard:
The White Mesa Mill (the "Mill") performed first quarter ("Q 1") groundwater monitoring during
the period from January 1, to March 31, 2019 under the January 19, 2018 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 March 22, 2019.
Pursuant to Part I.G.1.a) of the GWDP, 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).
As a result of the issuance of a revised GWDP on January 19, 2018, which sets revised GWCLs,
requirements to perform accelerated monitoring under Part I.G.1 of the previous GWDP ceased
effective on January 19, 2018, and the effect of the issuance of the revised GWDP was to create
a "clean slate" for all constituents in all wells going forward.
Part I.G.1 c) of the GWDP states "that the Permittee shall prepare and submit within 30 calendar
days to the Director 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 Q1 2019 exceedances includes, for each exceedance, a brief discussion of whether
VIA PDF AND OVERNIGHT DELIVERY
Ty L. Howard
Director
Division 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
Letter to Mr. Ty L. Howard
April 17, 2019
Page 2
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") 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 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. A Plan and Time Schedule will not be prepared for monitoring wells with two successive
exceedances if those successive exceedances were reported in a previous quarter and/or
were included in a previous Source Assessment Report ("SAR"). Inclusion in a previous
SAR means that the GWCLs were modified based on conclusions and actions delineated
in the previous SAR which were accepted by DWMRC.
3. 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
exceedances for accelerated constituents not due to Mill activities, but due to repeat sampling of
the same water.
Letter to Mr. Ty L. Howard
April 17, 2019
Page 3
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 Q1 2019. A 30-day plan and schedule
contemplated in Part I.G. 1 c) of the GWDP will be required for the consecutive exceedances of
cadmium in MW-25 as noted 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 August 20, 2017, June 25, 2018, and
January 16, 2019 and the Plan and Time Schedules submitted December 5, 2019 (approved
March 5, 2019) and February 21, 2019.
MW-11
• Manganese concentrations exceeded the GWCL in MW-11 in all of the Q1 sampling
events. A Plan and Time Schedule was submitted to DWMRC on February 21, 2019. A
plan and schedule to address this consecutive exceedance is not necessary and will not be
submitted.
MW-25
• Cadmium concentrations exceeded the GWCL in MW-25 in the February and March
2019 monthly sampling events. This is the first consecutive exceedance for cadmium in
MW-25 under the January 19, 2018 GWDP. Therefore, a plan and schedule for
assessment will be submitted under separate cover within 30 days of this Exceedance
Notice.
MW-26
• Nitrate + nitrite has exceeded its GWCL in all of the Q4 2018 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 in all of the Q4 2018 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.
• The chloride concentration exceeded its GWCL in in the December 2018 monthly and
the Q1 2019 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;
Letter to Mr. Ty L. Howard
April 17, 2019
Page 4
therefore, a plan to address this consecutive exceedance 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.
MW-30
• Nitrate + nitrite has exceeded its GWCL in all of the Q1 2019 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 Q1 2019 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.
• Uranium concentrations exceeded the GWCL in MW-30 in all of the Q1 2019 sampling
events. These exceedances are addressed in the SAR dated January 16, 2019. A plan or
schedule to address the Q1 exceedances is not necessary and is not being submitted because
exceedances have been addressed in the SAR which was submitted to DWMRC on January 16,
2019. The exceedances will continue to be noted and reported.
MW-31
• Nitrate + nitrite has exceeded its GWCL in all of the Q1 2019 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 Q1
2019. 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.
Letter to Mr. Ty L. Howard
April 17, 2019
Page 5
• The sulfate concentration exceeded the GWCL in the January 19, 2018 GWDP in all of
the Q1 2019 sampling events. These exceedances are addressed in the SAR dated August
20, 2017 and approved by DWMRC on March 20, 2018. As a result of the SAR, the
GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs
became effective upon their publication in the March 19, 2019 GWDP. Sulfate was
reported herein because the samples were collected prior to the publication of the March
19, 2019 GWDP. Sulfate will be removed from future exceedance notices.
• The Total Dissolved Solids ("TDS") concentration exceeded the GWCL in the January
19, 2018 GWDP in all of the Q1 2019 sampling events. These exceedances are
addressed in the SAR dated August 20, 2017 and approved by DWMRC on March 20,
2018. As a result of the SAR, the GWCLs have been recalculated and accepted by
DWMRC. The recalculated GWCLs became effective upon their publication in the
March 19, 2019 GWDP. TDS was reported herein because the samples were collected
prior to the publication of the March 19, 2019 GWDP. TDS will be removed from future
exceedance notices.
• The uranium concentration exceeded the GWCL in the January 19, 2018 GWDP in all of
the Q1 2019 sampling events. These exceedances are addressed in the SAR dated August
20, 2017 and approved by DWMRC on March 20, 2018. As a result of the SAR, the
GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs
became effective upon their publication in the March 19, 2019 GWDP. Uranium was
reported herein because the samples were collected prior to the publication of the March
19, 2019 GWDP. Uranium will be removed from future exceedance notices.
• The selenium concentration exceeded the GWCL in the January 19, 2018 GWDP in all of
the Q1 2019 sampling events. These exceedances are addressed in the SAR dated August
20, 2017 and approved by DWMRC on March 20, 2018. As a result of the SAR, the
GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs
became effective upon their publication in the March 19, 2019 GWDP. Selenium was
reported herein because the samples were collected prior to the publication of the March
19, 2019 GWDP. Selenium will be removed from future exceedance notices.
1.2 Quarterly Wells with New Exceedances Reported in Q1
Four new exceedances for the Q1 2019 quarterly well sampling program are listed below.
These exceedances will result in an accelerated sampling frequency from quarterly to monthly.
The wells listed below will only be sampled during the monthly events for those constituents that
exceeded the GWCLs. The wells listed below will be sampled for all constituents listed in the
GWDP during the quarterly events as that is the regularly scheduled sampling for the quarterly
wells. It is important to note EFRI requested removal of field pH in MW-30 from accelerated
monitoring by letter dated January 24, 2019. The February monthly sample results reported a
concentration of field pH below the GWCL. Accelerated monthly monitoring of this constituent
will continue uninterrupted pursuant to the requirements described below.
• Field pH in MW-30 was slightly below the GWCL in the February monthly sampling
event.
Letter to Mr. Ty L. Howard
April 17, 2019
Page 6
• Ammonia in MW-26 was slightly above the GWCL in the Q1 sampling event.
• Field pH in MW-36 was slightly below the GWCL in the February monthly sampling
event.
• Selenium in MW-30 was slightly above the GWCL in the Q1 sampling event.
Relative to accelerated reporting requirements, 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.
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 (Q4 2018 and Q1 2019).
MW-24
• Thallium concentrations exceeded the GWCL in MW-24 in the Q4 2018 and Q1 2019
sampling events. Thallium exceedances are addressed in the Plan and Time Schedule
dated December 5, 2018, which DWMRC approved by letter dated March 5, 2019. A
plan and schedule to address this consecutive exceedance is not necessary and will not be
submitted.
• Beryllium concentrations exceeded the GWCL in MW-24 in the Q4 2018 and Q1 2019
sampling events. Beryllium exceedances are addressed in the Plan and Time Schedule
dated December 5, 2018, which DWMRC approved by letter dated March 5, 2019. A
plan and schedule to address this consecutive exceedance is not necessary and will not be
submitted.
• Cadmium concentrations exceeded the GWCL in MW-24 in the Q4 2018 and Q1 2019
sampling events. Cadmium exceedances are addressed in the Plan and Time Schedule
dated December 5, 2018, which DWMRC approved by letter dated March 5, 2019. A
plan and schedule to address this consecutive exceedance is not necessary and will not be
submitted.
MW-27
• The nitrate+nitrite concentration exceeded its GWCL for both the Q4 2018 sampling
event and the Q1 2019 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.
Letter to Mr. Ty L. Howard
April 17, 2019
Page 7
MW-28
• Chloride has exceeded the GWCL for both the Q4 2018 sampling event and the Q1 2019
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.
• Uranium has exceeded the GWCL for both the Q4 2018 sampling event and the Q1 2019
sampling event. This consecutive exceedance is addressed in the Plan and Time
Schedule, dated December 4, 2014. As a result of the Plan and Time Schedule, additional
data will be collected and an assessed. As a result of DWMRC's acceptance of the Plan
and Time Schedule, no additional actions for this consecutive exceedance are necessary
at this time.
2.2 Semi-annual Wells with New Exceedances Reported in Q1
There were no new exceedances for the semi-annual well sampling program.
Yours truly
ENERGY FUELS RESOURCES (USA) INC.
Kathy Weinel
Quality Assurance Manager
cc: David Frydenlund
Terry Slade
Logan Shumway
Scott Bakken
Paul Goranson
Table 1 - GW/CL Exceedances for First Quarter 2019 under the Jarman 19, 2018 GWDP
Q1 2018 Results 0.2 2018 Results Q4 2018 Results
mitoring Well
Water Class) Constituent Exceeding GWCL
GWCL in
January 19,
2018 GWDP
January
2018
Monthly
Sample
Date
January
2018
Monthly
Result
Q1 2018
Sample
Date
Q1 2018
Result
March
2018
Monthly
Sample
Date
March
2018
Monthly
Result
Q2 2018
Sample
Date
Q2 2018
Result
May 2018
Monthly
Sample
Date
May 2018
Monthly
Result
June 2018
Monthly
Sarnple Date
June 2018
Monthly
Result
July 2018
Monthly
Sample Date
July 2018
Monthly
Result
August
2018
Monthly
Sample
Date
August 2018
Monthly
Result
Q3 2018
Sample Date ` '
Q3 2018
Result
Q4 2018
'! . .. . te
Q4 2018
Result
November
2018
Monthly
Sample Date
November
2018
Monthly
Result
December
2018 Monthly
Sample Date
December
2018
Monthb
Result
, A
Requi
5/15/2018 10/25/2018 161 11/14/2018 11 (Class II) Manganese (ug/L) 164 67 1/24/2018 lija 2/20/2018 117 3/6/20 8 4/18/2018 /74 NA 6/19/2018 NA 7/24/2018 NA 8/9/2018 154 9/11/2018 171 195 12/11/2018 230 14. (Class III) Fluoride (mg/L) 0.2 1/23/2018 0.153 2/19/2018 0.100 3/6/2018 0.110 4/12/2018 <0.100 5/14/2018 0.135 6/18/2018 0.146 7/24/2018 0.183 8/9/2018 <0 100 9/11/2018 <0.100 10/25/2018 0.126 11/13/2018 0.142 12/11/2018 0.146
25 (Class III) Cadmium (ug/L) 1.5 1/23/2018 1.38 2/19/2018 28 3/7/2018 1.45 4/17/2018 1.38 5/14/2018 1.34 6/18/2018 1.38 7/23/2018 1.30 8/9/2018 1.36 9/10/2018 1.35 10/24/2018 1.30 11/13/2018 1.51 12/10/2018 1.49 Fluoride (mg/L) 0.42 NA 0.281 0.318 0.360 0.346 0.210 0.128 0.243 0.243 0.313 0.309 0.298
26 (Class III)
Nitrate + Nitrite (as N) (mei-) 0.62
1/25/2018
0.862
2/22/2018
0.742
3/8/2018
0.691
4/19/2018
0.816
5/15/2018
0.920
6/19/2018
0.8 15
7/24/2018
0.704
8/10/2018
1.40
9/13/2018
0.825
10/25/2018
1.25
11/14/2018
1.08
12/10/2018
1.11 Chloroform (ug/L) 70 2280 1730 2350 2500 1740 3920 1160 1030 728 1130 2960 1460 Chloride (mg/L) 58.31 57.5 64.3 75.2 62.5 62.4 66.9 66.0 68.8 74.5 57.0 57.6 80.3 Methylene Chloride (ug/L) 5 5.79 9.80 11.6 17.4 8.55 10.3 3.07 2.47 1.58 2.13 4.99 2.55 Nitrogen, Ammonia as N 0.92 NA 0.506 NA 0.396 NA NA NA NA 0.480 0.415 NA NA Field pH (S.U.) 5.61 - 8.5 6.11 6.35 6.73 5.50 6.81 7.00 7.18 6.64 6.57 6.38 6.57 6.87
30 (Class II)
Nitrate + Nitrite (as N) (mg/L) 2.5
1/23/2018
15.2
2/22/2018
17.6
3/8/2018
17.0
4/12/2018
17.3
5/15/2018
17.7
6/19/2018
16.9
7/24/2018
17.4
8/10/2018
18.7
9/11/2018
18.0
10/22/2018
17.3
11/14/2018
16.9
12/11/2018
17.2 Chloride (mg/L) 128 152 158 167 145 174 169 177 170 183 140 166 154 Selenium (ug/L) 47.2 43.5 45.5 NA 46 4 NA NA NA NA 42.5 45.6 NA NA Uranium (ug1L) 8.32 8.53 8.23 8.66 7.98 8.44 8.80 8.69 7.69 8.34 8.08 8.81 8.20 Field pH (S.U.) 6 47 - 8.5 6.18 6.54 6.87 6.33 6.74 6.84 7.39 6.91 6.94 6.56 6.94 7.11
31 (Class III)
Nitrate + Nitrite (as N) (mg/L) 5
1/24/2018
17.0
2/20/2018
18.8
3/5/2018
19.0
4/17/2018
19.0
5/14/2018
18.8
6/18/2018
18.0
7/23/2018
18.0
8/10/2018
18.3
9/10/2018
20.1
10/24/2018
18.3
11/13/2018
17.9
12/10/2018
18.3 TDS (mg/L) 1700 1800 1930 NA 1980 NA 2010 2000 1980 2100 2000 1960 2090 Chloride (mg/L) 143 32.1 292 311 308 326 359 35 1 336 333 286 281 302 Selenium (ug/L) 86.81 89.3 88.7 N 90.2 NA 87.5 93.8 86.3 83.0 83.5 90.7 85.6 Uranium (ug/L) 9.1 1 1.4 11.2 11.4 11.5 11.5 12.9 12.3 11.7 11.0 11.6 13.2 12.7 Sulfate (mg/L) 697.60 835 NA 857 NA 976 857 841 893 950 841 905 . 36 (Class III) Field H (S.U.) 6.49 2 NS NA 3/7/2018 6.60 NS NA 4/11/2018 6.99 NS NA NS NA NS NA NS NA
Re '
10/3/2018 6.72 12/6/2018 7.08 NS NA NS NA
)5 (Class II) Uranium (ug/L) 7.5 NS NA 2/16/2018 0.910 NS NA 4/10/2018 0.875 NS NA NS NA NS NA NS NA 9/11/2018 0.631 10/30/2018 0.618 NS NA NS NA 12 (Class III) Uranium (ug/L) 23.5 NS NA 3/2/2018 23.3 NS NA 4/10/2018 21.1 NS NA NS NA NS NA NS NA 9/12/2018 21.1 10/31/2018 20.9 NS NA NS NA
14 (Class III)
Beryllium (ug/L) s _
NS
NA
3/2/2018
1.69
NS
NA
4/19/2018
2.78
NS
NA
NS
NA
NS
NA
NS
NA
9/19/2018
1.68
10/24/2018
2.75
NS
NA
NS
NA Cadmium (ug/L) 6.43 NA NA NA 6.97 NA NA NA NA 5.59 7.05 NA NA
Fluoride (mg/L) 0.47 NA NA NA 0.324 NA NA NA NA NA 0.797 NA NA Nickel (mg/L) NA NA NA 49.5 NA NA NA NA NA 57.7 NA NA Thallium (ug/L) 2.01 NA NA NA 2.44 NA NA NA NA 2.18 2.63 NA NA Field pH (S.D.) 5.03 - 8.5 NA 5.89 NA 4.45 NA NA NA NA 5.30 5.09 NA NA
17 (Class 111) Nitrate + Nitrite (as N) (mg/L) 5.6 NS NA 2/21/2018 6.19 NS NA 4/18/2018 6.09 NS NA NS NA NS NA NS NA 9/12/2018 6.35 10/29/2018 8.69 NS NA NS NA Chloride (mg/L) 38 NA 32.4 NA 34.7 NA NA NA NA 35.6 28.9 NA NA
18 (Class III)
Chloride (mg/L) 105
NS
NA
2/21/2018
121
NS
NA
4/19/2018
138
NS
NA
NS
NA
NS
NA
NS
NA
9/12/2018
148
10/30/2018
119
NS
NA
NS
NA Cadmium (ug/L) 5.2 NA 4.57 NA 4.99 NA NA NA NA 4.84 4.61 NA NA Gross Alpha (pCi/L) 2.42 NA NA NA 1.38 NA NA NA NA NA 2.55 NA NA
Uranium (ug/L) 4.9 NA 3.94 NA 5.06 NA NA NA NA 7.04 6.18 NA NA
12 (Class III) Chloride (mg/L) 35.39 NS NA 2/16/2018 37.4 NS NA 4/10/2018 37.2 NS NA NS NA NS NA NS NA 9/5/2018 41.1 10/29/2018 33.7 NS NA NS NA
Sulfate (mg/L) 2556.70 NA 2160 NA 2000 NA NA NA NA 2060 1800 NA NA
15 (Class II) Nitrogen. Ammonia as N 0.14 NS NA NS NA 4/10/2018 0.254 NS NA NS NA NS NA NS NA 9/10/2018 <0.0500 10/18/2018 0.117 NS NA NS NA
ot Required and Not Sampled
lot Applicable
dances are shown in yellow
ursuant to the January 19, 2018 GWDP these parameters were no longer in exceedance after January 19, 2018 and accelerated sampling was no longer required. The reset of the GWas allowed for the cessation of monthly sampling of these parameters after the issuance of the GWDP
ing during the March monthly event. The exceedances noted during the first quarter event will begin accelerated monitoring with the June monthly event, as required by the revised GWDP.
GWas were reset with the issuance of the January 19, 2018 GWDP. These parameters were no longer in exceedance and these accelerated samples were not required under the January 19, 2018 GWDP. These data were collected and are reported as required by Part 11.F of the GW
'Fable 1 - GWC1, Exceedances for Eir:t Quarter 2019 under the January 19, 2018 GWDP
01 2019 Results
itoring Well
Liter Classi
Constituent Exceeding
GWCL
CWCL in January
19, 2018 GWDP
Q I 2019
Sample Date
Q1 2019
Result
February 2019
Monthly
Sample Date
February
2019
Monthly
Result
March 2019
Monthly
Sample Date
March
2019
Monthly
Result
Required Quarterly Sampling Wells
1 (Class II) Manganese (ug/L) 164 67 1/15/2019 181 2/13/2019 211 .V6/2019 170
4 (Class III) Fluoride (mg/L) 0 2 1/17/2019 0.1 0 NS NA NS NA
5 (Class III) Cadmium (ug/L) 1.5 1/16/2019 1.32 2/12/2019 1.52 3/5/2019 1.54
Fluoride (mg/L) 0.42 0.302 NA NA
Nitrate + Nitrite (as N) (mg/L) 0.62 2.21 0.967
3/6/2019
3.22
Chloroform (ug/L) 70 1200 1300 1290
Chloride (mg/L) 58,31 70.7 57.2 60.4
Methylene Chloride (ug/L) 5 3.24 1.91 1.45
Nitrogen, Ammonia as N 0.92 0.938 NA NA
Field pH (S.U.) 5.61 - 8.5 6.43 6.25 6.77
0 (Class II)
Nitrate + Nitrite (as N) (mg/L) 2.5
1/16/2019
17.9
2/13/2019
18.2
3/6/2019
16.2
Chloride (mg/L) 128 157 167 160
Selenium (ug/L) 47.2 48.6 NA NA
Uranium (ug/L) 8.32 9.07 9.09 8.39
Field pH (S.U.) 6.47 - 8.5 6.60 6.46 6.97
I (Class III)
Nitrate + Nitrite (as N) (mWL) 5
1/15/2019
19.0
2/12/2019
18.6
3/5/2019
18.5
TDS (m6/L) 1700 2030 2090 2160
Chloride (mg/L) 143 283 296 322
Selenium (ug/L) 86.81 89.7 88.5 91.1
Uranium (ug/L) 9.1 13.2 13.6 12.5
Sulfate (mg/L) 697.60 851 893 953
36 (Class III) Field pH (S.U.) 6.49 - 8.5 1/23/2019 6..15 NS NA NS NA
Required Semi-Annual Sampling Wells
5 (Class II) Uranium (ug/L) 7.5 1/17/2019 0.557 NS NA NS NA
2 (Class III) Uranium (ug/L) 33 5 1/21/2019 23.6 NS NA NS NA
4 (Class III)
Beryllium (ug/L) 2
1/23/2019
3.37
NS
NA
NS
NA
Cadmium (ug/L) 6.43 8.34 NA NA
Fluoride (mg/L) 0.47 NA NA NA
Nickel (mg/L) 50 NA NA NA
Thallium (ug/L) 2.01 2.72 NA NA
Field pH (S.U.) 5.03 - 8.5 4.63 NA NA
7 (Class III) Nitrate + Nitrite (as N) (me/L) 5.6 1/21/2019 6.40 NS NA NS NA
Chloride (mg/L) 38 31.0 NA NA
Chloride (mg/L) 105 127
NS
NA
NS
NA
Cadmium (ug/L) 5.2 4.76 NA NA
Gross Alpha (pCi/L) 2.42 NA NA NA
Uranium (ug/L) 4.9 7.12 NA NA
2 (Class III) Chloride (mg/L) 35.39 1/22/2019 35.6 NS NA NS NA
Sulfate (mg/L) 2556.70 1950 NA NA
-35 (Class 11) Nitrogen. Ammonia as N 0.14 1/16/2019 0.100 NS NA NS NA
A Required and Not Sampled
at Applicable
lances are shown in yellow
nt to the DWMRC letters of February 1, and March 5, 2019, these constituents will no longer be rnonitored on an accelerated schedule. These constituents
dropped from this report after this quarter.
3Was were reset with the issuance of the March 19, 2019 GWDP. These parameters are no longer in exceedance as of March 19, 2019. These constituents
dropped after this quarter.