ASVL Isotope Update Memo_20171004

41P
synTerra MEMORANDUM
Date: October 04, 2017 File: 102.102.41
To: John Toepfer
Cc: Ryan Czop, Kathy ebb ynTerra)
From: Todd Plating��
Subject: Ongoing Assessment Update and Recommendations at the
Asheville Steam Electric Plant
Representatives of Duke Energy, SynTerra, and the North Carolina Department of
Environmental Quality, Asheville Regional Office, met on August 29, 2017. The focus of the
meeting was flow and transport modeling and geochemical modeling for the Asheville Steam
Electric Plant, but other topics were discussed. Particular emphasis was given to the progress
of ongoing isotope evaluation, as well as strategies for further evaluation of interaction
between groundwater and the French Broad River (FBR). The following sections provide an
isotope evaluation status report and recommendations for additional hydraulic evaluation of
groundwater/FBR interaction.
ISOTOPE EVALUATION
Additional groundwater sampling and surface water sampling — to evaluate boron, strontium,
deuterium, and tritium isotopes at locations east and west of the FBR — have been completed.
During April 2017,46 groundwater and surface water locations were sampled and analyzed.
Five of those samples were collected from water supply wells and a springhouse on the
western side of the FBR. Summaries of analytical results and sample locations are presented in
Table 1 and Figure 1, respectively. Analytical laboratory reports are included as Attachment A.
Additional water supply wells are present on the west side of the FBR. Those locations will be
included in the isotope evaluation if permission to access and collect a groundwater sample is
granted. Duke Energy has attempted to obtain permission to sample those wells on numerous
occasions with little success. The following timeline provides a summary of outreach activities:
Letters were sent in January 2017 to owners of neighboring water supply wells. Those
letters described alternate water solutions and invited the owners to a community
information session.
• Water supply well owners who attended the community information session were told
that their wells would be sampled if they so desired.
• In early May 2017, follow-up letters were sent to the water supply well owners on
Ledbetter Road, Justin Trail, and Sumner Drive. The letters included a request for
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\41.EHS Update CSA\Iso_hyd_eval_Update\ASVL
Isotope Update Memo.doc

Ongoing Assessment Update and Recommendations Page 2 of 3
Duke Energy Progress - Asheville Steam Electric Plant
permission to sample their wells. Duke Energy requested a phone call response to set
up a time to sample their well. No response was received from any of the well owners.
In early May 2017, SynTerra contacted water supply well owners not located on
Ledbetter Road, Justin Trail, or Sumner Drive to request permission to sample their
wells. Permission to sample four locations along Hoyt Road was obtained.
• In June 2017 and July 2017, there were multiple communications between attorneys for
the homeowners on Ledbetter Road, Justin Trail, and Sumner Drive and Duke's
attorneys. Included in these communications were requests to collect samples from
those owners' wells. No permission was granted.
In August and September 2017, communications not related to sampling wells occurred
between Duke Energy and the attorneys representing homeowners on the
aforementioned streets. To date no permission has been granted to sample wells.
The isotopic data will be used to evaluate potential bedrock flow paths in the direction of
northeast to southwest beneath the FBR.
HYDRAULIC EVALUTION OF GROUNDWATER INTERACTION WITH THE
FRENCH BROAD RIVER
The installation of seven deep bedrock wells along the eastern shore of the FBR is planned for
the near future (Figure C-02). Installation of those wells would provide an opportunity to
conduct additional evaluation of the interaction between groundwater and the FBR. SynTerra
recommends a three-phase approach to fully evaluate this hydraulic connection:
Instrument existing and newly installed monitoring wells with pressure
transducers.
2. Complete up to three pumping tests at newly installed deep bedrock wells along
the FBR.
3. Install well nests (where possible) at newly drilled deep bedrock wells to isolate
individual fracture zones.
Using pressure transducers to measure groundwater head potential over time within existing
and newly installed monitoring wells enables determination of baseline conditions and may
also provide evidence of influence from nearby pumping wells (including west of the FBR),
precipitation events, or other anomalous factors. Installing the transducers prior to
implementation of the drilling program could yield compelling results and provide insight to
interconnectivity of identified flow zones if pressure signals from the drilling are observed.
These pressure transducers should be installed prior to conducting pumping tests, and
continued monitoring of water levels should be conducted throughout pumping test activities.
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\41.EHS Update CSA\Iso_hyd_eval_Update\ASVL
Isotope Update Memo.doc

Ongoing Assessment Update and Recommendations Page 3 of 3
Duke Energy Progress - Asheville Steam Electric Plant
Recommendations about specific locations for monitoring can be incorporated into a detailed
work plan, at the request of Duke Energy.
Pumping tests can be used to determine aquifer characteristics and measure boundary effects
encountered while pumping. Test data can be evaluated to provide additional insight and
quantitative evidence of the interaction between groundwater and the French Broad River.
Information gathered during the pumping tests can also be used to further refine the
groundwater flow and transport model. Conceptually, three locations will be selected along the
FBR floodplain for obtaining information along the width of the discharge area to the FBR. For
example, MW-16BRL, MW-26BRL, and MW-20BRL could be ideal candidates for pumping
tests. Generally, pumping tests designed to identify and evaluate boundary conditions must be
conducted over a longer period of time. However, the location of proposed wells adjacent to
the FBR should yield usable results within a 72 -hour pumping time period. Evaluation of data
in the field will ultimately be used to determine the test durations. A detailed pumping test
work plan can be developed, at the request of Duke Energy, once information from the
installation of deep bedrock wells is available.
The installation of nested wells (where appropriate) at the proposed deep bedrock locations
will enable the measurement of discrete head potentials from individual fracture zones. Those
measurements will be used to evaluate vertical gradients and potential interaction (or absence
of interaction) with the FBR. In addition to potentiometric data, groundwater samples can be
collected, allowing comparison of groundwater chemistry from multiple fracture zones at a
single location.
Attachments: Table 1
Figure 1
Figure C-02
Attachment A
2017 Analytical Results Summary
Isotope Sample Location Map
Wetlands and Proposed Wells
Laboratory Analytical Data Reports
P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\41.EHS Update CSA\Iso_hyd_eval_Update\ASVL
Isotope Update Memo.doc

TABLE 1
Duke Energy Asheville Plant Isotopic Analytic Results
as of September 25, 2017
NOTES:
NS =Analysis not scheduled NR = Analyzed but no result -stable signal not obtained
NA = Not analyzed due to insuffient mass AP = Analysis in progress
Analysis
3H
5180
5D
5116
5345
87Sr/86Sr
Reporting Units
TU
%o
%.
%.
I %.
ratio
Sample ID
Sample
Collection Date
Sample
Type
Analytical Results
CCR -102S
4/7/2017
GW
3.8
-2.5
-19.4
-0.5
7.1
0.711
CCR -102D
4/7/2017
GW
4.9
-2.1
-18.4
1.5
7.3
0.712
CCR-101BR
4/12/2017
GW
4.0
-3.4
-22.9
2.5
7.4
0.717
GW -03
4/11/2017
GW
5.2
-3.6
-23.4
-2.7
7.1
0.712
MW -18D
4/6/2017
GW
4.5
-3.0
-20.7
-1.9
4.8
0.723
MW-18BR
4/6/2017
GW
4.5
-2.8
-20.1
-1.2
4.8
10.727
MW-18BRL
4/6/2017
GW
1.7
-5.6
-34.6
16.4
4.9
0.723
MW -20A
4/7/2017
GW
5.0
-2.0
-13.3
6.1
8.3
0.719
MW -065
4/10/2017
GW
4.5
-1.3
-14.0
2.2
7.9
0.714
MW -05D
4/13/2017
GW
4.5
-3.8
-24.4
12.6
7.2
0.723
MW -06D
4/10/2017
GW
4.3
-1.6
-14.8
2.6
8.9
0.714
AMW-01B
4/12/2017
GW
3.7
-3.3
-21.1
8.4
10.1
0.727
CB -04B
4/13/2017
GW
4.0
-2.9
-21.7
21.6
NA
NA
MW-OSBR
4/13/2017
GW
4.3
-5.0
-30.2
8.5
-4.5
0.719
MW-06BR
4/10/2017
GW
1.1
-5.4
-32.6
19.5
12.7
0.720
MW -16A
4/12/2017
GW
5.2
-4.5
-27.6
27.2
8.8
0.719
MW -085
4/7/2017
GW
4.1
-2.4
-18.9
2.1
7.3
0.711
MW -09D
4/12/2017
GW
3.9
1 -3.4
-24.2
3.5
7.4
0.713
GW -02
4/11/2017
GW
4.2
-2.5
-18.6
15.8
8.1
0.713
EXT -01
4/13/2017
GW
4.4
-1.8
-17.5
-2.9
7.0
0.711
MW-09BR
4/12/2017
GW
3.9
-2.6
-20.8
20.5
8.7
0.724
MW-16BR
4/12/2017
GW
4.4
-5.2
-29.9
33.8
9.1
0.720
GW -01
4/10/2017
GW
3.8
-3.0
-21.2
38.6
3.9
NA
GW -01D
4/10/2017
GW
4.5
-2.9
-20.9
34.5
5.9
0.722
GW-01BR
4/10/2017
GW
5.7
-6.1
-35.7
34.6
7.9
0.726
CB -09
4/13/2017
GW
3.6
-3.3
-20.8
NR
NA
0.718
CB-09SL
4/13/2017
GW
4.4
-2.8
-19.3
25.7
NA
0.718
CB-09BR
4/13/2017
GW
5.4
-2.4
-18.2
38.7
NA
0.726
CB -05
4/6/2017
GW
4.7
-3.9
-23.7
11.7
9.6
0.721
CB -01
4/13/2017
GW
4.3
-5.9
-31.8
35.4
NA
NA
CB -01D
4/13/2017
GW
4.5
-6.2
-34.1
NR
4.6
0.722
MW -10
4/11/2017
GW
4.2
-6.0
-33.7
27.4
10.1
0.721
AMW-03B
4/12/2017
GW
5.7
-6.4
-37.5
25.2
NA
0.726
MW -24S
4/12/2017
GW
4.4
-6.1
-35.5
NR
NA
0.722
SWu-1
4/18/2017
SW
5.5
-1.0
-10.2
35.4
6.7
0.718
SW -06
4/18/2017
SW
5.0
-4.9
-24.8
19.5
10.2
0.718
SWFBR-1
4/19/2017
SW
4.9
-5.8
-29.5
19.5
7.9
0.717
SWFBR-2
4/18/2017
SW
5.0
-5.9
-28.7
25.1
8.2
0.717
SWFBR-3
4/18/2017
SW
3.7
-5.7
-29.0
26.8
7.9
0.717
SWFBR-4
4/18/2017
SW
3.8
-5.8
-28.9
19.5
6.6
0.717
AVL Rain
4/19/2017
Precip
NS
-2.7
-0.7
NS
NS
NS
AS -9
5/5/2017
GW
1.9
-6.3
-37.0
29.2
AP
AP
8 HOYT
5/5/2017
GW
4.3
-6.0
-33.0
29.3
AP
NA
25 HOYT
5/5/2017
GW
1.2
-6.8
-38.6
AP
AP
AP
42 HOYT
5/5/2017
GW
4.4
-5.9
-32.9
AP
AP
NA
44 HOYT
5/5/2017
GW
3.5
-6.2
-34.4
AP
AP
AP
NOTES:
NS =Analysis not scheduled NR = Analyzed but no result -stable signal not obtained
NA = Not analyzed due to insuffient mass AP = Analysis in progress

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"%I TETRA TECH
INTERIM REPORT OF ANALYSES
Analyses performed by:
Tetra Tech, Inc.
Boron Isotope Laboratory
3801 Automation Way, Ste. 100
Fort Collins, CO 80525
[phone]
www.tetratech.com
September 25, 2017
Client
Duke Energy
13339 Hagers Ferry Rd
Huntersville, N.C. 28078

TETRA TECH
September 25, 2017
Zachary Hall
Duke Energy
13339 Hagers Ferry Rd
Huntersville, N.C. 28078
RE: Boron Isotope Analyses for Duke Energy
Dear Mr. Hall:
Please find enclosed an Interim Report of Results for 39 of 45 samples submitted to us on June 28, 2017 for boron
isotope analysis. The attached documents contain results for the samples analyzed and other explanatory
information.
The 39 samples for which results are reported were analyzed routinely and no analysis problems were encountered.
Analysis was attempted but was not successful for three samples due to insufficient volume for the small amount
of boron mass present. Analyses for the remaining three samples are in process and will be reported as a part of a
Final Report of Results.
The machine bias correction factor (MBCF), defined in Report Definitions, is based on the analytical results of the
either the NBS standard or seawater sample, as reported in each certificate of analysis. Precision, based on the
standard deviation of values obtained for the MBCF, is less than +/- 1.00 %o 6"B
The data contained in the following report have been reviewed and approved by the personnel listed on each
Certificate of Analysis. In addition, Tetra Tech represents that the analyses reported herein are true, complete, and
correct within the limits of the methods employed.
Please notify us if there are questions or if you need additional information. We will hold the samples for 30 days
before they are discarded unless notified by Duke Energy to do otherwise.
In addition to isotope geochemistry, Tetra Tech provides a wide range of geochemical consulting services,
including, but not limited to, forensic geochemistry, flow and transport modeling, environmental geochemistry,
water source assessment, applied experimental, and litigation support. Please let us know if we can be of further
assistance in providing any geochemical consulting services.
Thank you for selecting our lab for your boron isotope requirements.
Sincerely,
a4-4�� AJL
E.R. Muller, P.G.
Project Scientist
Tetra Tech
3801 Automation Way, Suite 100, Fort Collins, CO 80525
Tel [phone] Fax [phone] www.tetratech.com
Page 2 of 54

D
TETRA TECH
Tetra Tech
3801 Automation Way, Suite 100
Fort Collins, CO 80525
Tel [phone]
Fax [phone]
www.tetratech.com
RESULTS OF ANALYSIS FOR BORON ISOTOPIC COMPOSITION
Version 11/29/11
Page 3 of 54

O TETRATECH Tetra Tech, Inc.
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph: 970-223-9600 Fax: [phone]
Client: Duke Energy Carolinas LLC
Report Date: 9/25/2017
Project: 114-021906_100
Contact: Zachary Hall
www.tetratech.com
Summary of Boron Isotopic Results -Page 1
Client's ID#
Sample Collection Date
Lab ID#
Receipt Date
B m /0)
Date Analyzed
AMW-01 B
4/12/2017
021906_100_01
04/20/17
0.393
07/03/17
AMW-03B
4/12/2017
021906_100_02
04/20/17
0.00283
08/22/17
CB -01
4/13/2017
021906_100_03
04/20/17
0.002
08/08/17
CB -01D
4/13/2017
021906_100_04
04/20/17
0.00423
NA
CB -04B
4/13/2017
021906_100_05
04/20/17
0.0256
08/31/17
CB -05
4/6/2017
021906_100_06
04/20/17
0.286
07/05/17
CB -09
4/13/2017
021906_100_07
04/20/17
0.00813
NA
CB-09BR
4/13/2017
021906_100_08
04/20/17
0.00565
09/08/17
CB-09SL
4/13/2017
021906_100_09
04/20/17
0.00511
08/14/17
CCR -101 BR
4/12/2017
021906_100_10
04/20/17
4.73
06/02/17
CCR -102D
4/7/2017
021906_100_11
04/20/17
6.3
06/02/17
CCR -102S
4/7/2017
021906_100_12
04/20/17
8.32
06/01/17
EXT -01
4/13/2017
021906_100_13
04/20/17
14.5
06/01/17
GW -01
4/10/2017
021906_100_14
04/20/17
0.00992
08/08/17
GW -01 BR
4/10/2017
021906_100_15
04/20/17
0.0119
09/05/17
GW -01D
4/10/2017
021906_100_16
04/20/17
0.0179
08/08/17
GW -02
4/11/2017
021906_100_17
04/20/17
2.35
06/02/17
GW -03
4/11/2017
021906_100_18
04/20/17
1.6
06/19/17
MW-05BR
4/13/2017
021906_100_19
04/20/17
0.439
07/05/17
MW -05D
4/13/2017
021906_100_20
04/20/17
0.627
07/05/17
MW-06BR
4/10/2017
021906_100_21
04/20/17
0.128
08/09/17
MW -06D
4/10/2017
021906_100_22
04/20/17
1.59
06/23/17
MW -06S
4/10/2017
021906_100_23
04/20/17
1.04
06/19/17
MW -08S
4/7/2017
021906_100_24
04/20/17
6.9
06/02/17
MW-09BR
4/12/2017
021906_100_25
04/20/17
2.87
06/05/17
MW -09D
4/12/2017
021906_100_26
04/20/17
5.24
06/05/17
MW -10
4/11/2017
021906_100_27
04/20/17
0.00697
08/08/17
MW -16A
4/12/2017
021906_100_28
04/20/17
0.639
06/26/17
MW-16BR
4/12/2017
021906_100_29
04/20/17
0.181
08/04/17
MW-18BR
4/6/2017
021906_100_30
04/20/17
1.0
06/20/17
MW-18BRL
4/6/2017
021906_100_31
04/20/17
0.0475
07/06/17
MW -18D
4/6/2017
021906_100_32
04/20/17
0.961
06/23/17
MW -20A
4/7/2017
021906_100_33
04/20/17
0.681
06/26/17
MW -24S
4/12/2017
021906_100_34
04/20/17
0.0112
NA
SW -06
4/18/2017
021906_100_35
04/28/17
0.00706
08/28/17
SW FBR-1
4/19/2017
021906_100_36
04/28/17
0.0102
08/22/17
S W FBR-2
4/18/2017
021906_100_37
04/28/17
0.0072
08/17/17
SWFBR-3
4/18/2017
021906_100_38
04/28/17
0.00838
08/14/17
SWFBR-4
4/18/2017
021906_100_39
04/28/17
0.00872
08/04/17
SWLJ-1
4/18/2017
021906_100_40
04/28/17
0.0186
08/04/17
8 HOYT
5/5/2017
021906_100_42
05/17/17
<0.002
09/05/17
25 HOYT
5/5/2017
021906_100_43
05/17/17
<0.002
In Progress
AS -9
5/5/2017
021906_100_44
05/17/17
0.00411
08/20/17
42 HOYT
5/5/2017
021906_100_45
05/17/17
<0.002
In Progress
44 HOYT
1
1 5/5/2017
1
1 021906 100 46
1
1 05/17/17
1
1 <0.002
1
1 In Progress
NOTES:
1. B Concentration Provided by the Client
Page 4 of 54

O TETRATECH Tetra Tech, Inc.
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph: 970-223-9600 Fax: [phone] www.tetratech.com
Client: Duke Energy Carolinas LLC Project: 114-021906_100
Report Date: 9/25/2017 Contact: Zachary Hall
1,101G5:
1. S"B computed using NBS SRM 951
2. Precision of < t1.00 %. 611 B (1a) is given by the Standard Deviation from analysis of NBS standard or seawater.
3. MBCF: Machine bias correction factor
4. Correction (MBCF) is made for machine and extraction bias using results of NBS Standard analysis.
5. Correction (MBCF) is made for machine and extraction bias using results of seawater analysis.
6. Corr. d"B %o: Corrected 0B %. using MBCF
Page 5 of 54
Summary of Boron Isotopic
Results""u-Pape 2
Re licate
1
Re licate 2
Average
Client's ID#
111211106
811B %o
MBCF(') 8t1B %o
Corr. 81113
%o (0)
1161106
611B %.
MBCF(�) 811B %o
Corr. S"B %o (0)
8"B %"
AMW-01B
4.0523773
12.73986
4.3179
8.4
8.4
AMW-03B
4.1059217
26.12128
0.9669('1
25.2
25.2
CB -01
4.1468343
36.34585
0.96691'1
35.4
35.4
CB -01D
No Analysis
Reported, insufficient mass
CB -04B
4.091118
504
21.6
1.
CB -05
4.05218019
12.67104
0.9669('1
11.7
I
I 11.7
CB -09
No Analysis
Reported, insufficient mass
CB-09BR
4.1580739
39.15477
0.4340(4)
38.7
38.7
CB-09SL
4.1085997
26.79055
0.9669"1
25.8
4.1075803 26.53579
0.966Y'1
25.6
25.7
CCR-101BR
4.0288247
6.85378
4.3179("1
2.5
2.5
CCR -102D
4.0245895
5.79535
4.3179()
1.5
1.5
CCR -102S
4.0165540
3.78717
4.3179("1
-0.5
-0.5
EXT -01
4.0070063
1.40108
4.3179("1
-2.9
-2.9
GW -01
4.1595497
39.52359
0.9669('1
38.6
38.6
GW-01BR
4.1415105
35.01537
0.4340("1
34.6
34.6
GW -01D
4.1433006
35.46274
0.9669(6)
34.5
34.5
GW -02
4.0820722
20.16099
4.3179("1
15.8
15.8
GW -03
4.0080525
1.66254
4.3179("1
-2.7
-2.7
MW-05BR
4.0526312
12.80332
4.3179("1
8.5
8.6
MW -05D
4.0573989
13.99483
4.3179()
9.7
9.7
MW-06BR
4.0766567
18.80759
0.96691"
17.8
17.8
MW -06D
4.0291539
6.93603
4.3179(")
2.6
2.6
MW -06S
4.0274627
6.51340
4.3179("1
2.2
2.2
MW -08S
4.0270640
6.41376
4.3179(4)
2.1
2.1
MW-09BR
4.1006504
24.80392
4.3179("1
20.5
20.5
MW -09D
4.0301800
7.19248
4.3179("1
2.9
4.0355691 8.53929
4.3179`41
4.2
3.5
MW -10
4.1150193
28.39489
0.9669(')
27.4
27.4
MW -16A
4.1274770
31.50822
4.3179("1
27.2
27.2
MW-16BR
4.1406637
34.80374
0.9669('1
33.8
33.8
MW-18BR
4.0137794
3.09377
4.3179(")
-1.2
-1.2
MW-18BRL
4.0856414
21.05298
4.3179("1
16.7
4.0830421 20.40338
4.3179()
16.1
16.4
MW -18D
4.0094071
2.00107
4.3179(")
-2.3
4.0123853 2.74536
4.3179(41
-1.6
-1.9
MW -20A
4.0429356
10.38027
4.3179("1
6.1
6.1
MW -24S
No Analysis
Reported, insufficient mass
SW -06
4.0833323
20.47591
0.9669"1
19.5
19.5
SWFBR-1
4.0832826
20.46349
0.9669(')
19.5
19.5
SWFBR-2
4.1056340
26.04938
0.96691"
25.1
25.1
SWFBR-3
4.1140951
28.16392
0.9669(5)
27.2
4.1111589 27.43012
0.9669('1
26.5
26.8
SWFBR4
4.0832826
20.46349
0.9669"'
19.5
19.5
SWLJ-1
4.1468940
36.36077
0.9669")
35.4
35.4
8 HOYT
4.1203628
29.73029
0.4340("1
29.3
29.3
25 HOYT
In process
AS -9
4.1222879
30.21140
0.9669(')
29.2
1
I
1
1
1 29.2
42 HOYT
In process
44 HOYT
In process
1,101G5:
1. S"B computed using NBS SRM 951
2. Precision of < t1.00 %. 611 B (1a) is given by the Standard Deviation from analysis of NBS standard or seawater.
3. MBCF: Machine bias correction factor
4. Correction (MBCF) is made for machine and extraction bias using results of NBS Standard analysis.
5. Correction (MBCF) is made for machine and extraction bias using results of seawater analysis.
6. Corr. d"B %o: Corrected 0B %. using MBCF
Page 5 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_01
ClientlD#
AMW-01B
Sample Date
4/12/2017
B (mg/L)
0.393
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 07/03/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
AMW-01B
4.0523773
12.73986
4.3179
8.4
8.4
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 6 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_02
Client ID#
AMW-03B
Sample Date
4/12/2017
B (mg/L)
0.00283
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/22/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
AMW-0313
4.1059217
26.12128
0.9669
25.2
25.2
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 7 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_03
Client ID#
CB -01
Sample Date
4/13/2017
B (mg/L)
0.002
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/08/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
CB -01
4.1468343
36.34585
0.9669
35.4
35.4
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 8 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_05
Client ID#
CB -04B
Sample Date
4/13/2017
B (mg/L)
0.0256
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/31/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
CB -04B
4.0918118
22.59504
0.9669
21.6
21.6
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 9 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_06
Client ID#
CB -05
Sample Date
4/6/2017
B (mg/L)
0.286
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 07/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (S"B %o)
Corr. S17B %. (4)
51113 %e
CB -05
4.0521019
12.67104
0.9669
11.7
11.7
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 10 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_08
Client ID#
CB-09BR
Sample Date
4/13/2017
B (mg/L)
0.00565
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 09/08/17
Individual Boron Isotopic Results(11'10)
Replicate 1
Replicate 2
Average
Client's ID#
11 B/1 B
013 %u
MBCF�3) (8"13%o)
Corr. S"B %. lal
11 B/10B
013 %u
MBCF(')(8"B%.)
Corr.5l'B %n lal
013 %u
CB-09BR
4.1580739
39.15477
0.4340
38.7
38.7
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %0 811 B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 11 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_09
Client ID#
CB-09SL
Sample Date
4/13/2017
B (mg/L)
0.00511
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/14/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2(6)
Average
Client's ID#
11B/10B
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
51113 %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
CB-09SL
4.1085997
26.79055
0.9669
25.8
4.1075803
26.53579
0.9669
25.6
25.7
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 12 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_10
ClientlD#
CCR-101BR
Sample Date
4/12/2017
B (mg/L)
4.73
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/02/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11 B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
11 B/10B
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %o
CCR-101BR
4.0288247
6.85378
4.3179
2.5
2.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 13 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_11
Client ID#
CCR -102D
Sample Date
4/7/2017
B (mg/L)
6.3
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/02/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
5"B %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
CCR -102D
4.0245895
5.79535
4.3179
1.5
1.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 14 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_12
Client ID#
CCR -102S
Sample Date
4/7/2017
B (mg/L)
8.32
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/01/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
CCR -102S
4.0165540
3.78717
4.3179
-0.5
-0.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 15 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_13
Client ID#
EXT -01
Sample Date
4/13/2017
B (mg/L)
14.50
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/01/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
EXT -01
4.0070063
1.40108
4.3179
-2.9
-2.9
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 16 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_14
Client ID#
GW -01
Sample Date
4/10/2017
B (mg/L)
0.00992
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/08/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
5"B %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
GW -01
4.1595497
39.52359
0.9669
38.6
38.6
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 17 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_15
Client ID#
GW-01BR
Sample Date
4/10/2017
B (mg/L)
0.0119
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 09/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
OB %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
GW -01 BR
4.1415105
35.01537
0.4340
34.6
34.6
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 18 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_16
Client ID#
GW -01D
Sample Date
4/10/2017
B (mg/L)
0.0179
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/08/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (S"B %o)
Corr. S17B %. (4)
51113 %e
GW -01 D
4.1433006
35.46274
0.9669
34.5
34.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 19 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_17
Client ID#
GW -02
Sample Date
4/11/2017
B (mg/L)
2.35
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/02/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
GW -02
4.0820722
20.16099
4.3179
15.8
15.8
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 20 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_18
Client ID#
GW -03
Sample Date
4/11/2017
B (mg/L)
1.60
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/19/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
GW -03
4.0080525
1.66254
4.3179
-2.7
-2.7
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 21 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_19
Client ID#
MW-05BR
Sample Date
4/13/2017
B (mg/L)
0.439
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 07/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
5"B %°
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/706
51113 %°
I MBCF(') (8"B %°)
Corr. 51713 %° (4)
51113 %°
MW-05BR
4.0526312
12.80332
4.3179
8.5
4.0534355
13.00432
1 4.3179
8.7
8.6
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 22 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_20
Client ID#
MW -05D
Sample Date
4/13/2017
B (mg/L)
0.627
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 07/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
MW -05D
4.0573989
13.99483
4.3170
9.7
9.7
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_21
Client ID#
MW-06BR
Sample Date
4/10/2017
B (mg/L)
0.128
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/09/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (S"B %o)
Corr. S17B %. (4)
51113 %e
MW-06BR
4.0766567
18.80759
0.9669
17.8
17.8
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 24 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_22
Client ID#
MW -06D
Sample Date
4/10/2017
B (mg/L)
1.59
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/23/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
OB %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
MW -06D
4.0291539
6.93603
4.3179
2.6
2.6
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 25 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_23
Client ID#
MW -06S
Sample Date
4/10/2017
B (mg/L)
1.04
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/19/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
OB %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
MW -06S
4.0274627
6.51340
4.3179
2.2
2.2
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 26 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_24
Client ID#
MW -08S
Sample Date
4/7/2017
B (mg/L)
6.9
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/02/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11 B/1OB
57113 %o
MBCF(') (013 %°)
Corr. 5176 %o (4)
11 B/10B
811B %o
MBCF(') (8116 %°)
Corr. 81113 %0 (4)
5116 %o
MW -08S
4.0270640
6.41376
4.3179
2.1
2.1
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 27 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_25
Client ID#
MW-09BR
Sample Date
4/12/2017
B (mg/L)
2.87
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
5"B %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
MW-09BR
4.1006504
24.80392
4.3179
20.5
20.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 28 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_26
Client ID#
MW -09D
Sample Date
4/12/2017
B (mg/L)
5.24
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
5'16 %°
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/706
51113 %°
I MBCF(') (8"B %°)
Corr. 51713 %° (4)
51113 %°
MW -09D
4.0301800
7.19248
4.3179
2.9
4.0355691
8.53929
1 4.3179
4.2
3.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 29 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_27
Client ID#
MW -10
Sample Date
4/11/2017
B (mg/L)
0.00697
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/08/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (S"B %o)
Corr. S17B %. (4)
51113 %e
MW -10
4.1150193
28.39489
0.9669
27.4
27.4
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 30 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_28
Client ID#
MW -16A
Sample Date
4/12/2017
B (mg/L)
0.64
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/26/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
5"B %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
MW -16A
4.1274770
31.50822
4.3179
27.2
27.2
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 31 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_29
Client ID#
MW-16BR
Sample Date
4/12/2017
B (mg/L)
0.181
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/04/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
MW-16BR
4.1406637
34.80374
0.9669
33.8
33.8
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 32 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_30
Client ID#
MW-18BR
Sample Date
4/6/2017
B (mg/L)
1
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/20/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113 %°
MW-18BR
4.0137794
3.09377
4.3179
-1.2
-1.2
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_31
Client ID#
MW-18BRL
Sample Date
4/6/2017
B (mg/L)
0.0475
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 07/06/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %°
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/706
51113 %°
I MBCF(') (8"B %°)
Corr. 51713 %° (4)
51113 %°
MW-18BRL
4.0856414
21.05298
4.3179
16.7
4.0830421
20.40338
1 4.3179
16.1
16.4
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 34 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_32
Client ID#
MW -18D
Sample Date
4/6/2017
B (mg/L)
0.961
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/23/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %°
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/706
51113 %°
I MBCF(') (8"B %°)
Corr. 51713 %° (4)
51113 %°
MW -18D
4.0094071
2.00107
4.3179
-2.3
4.0123853
2.74536
1 4.3179
-1.6
-1.9
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 35 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_33
Client ID#
MW -20A
Sample Date
4/7/2017
B (mg/L)
0.681
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 06/26/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/106
811B %°
MBCF(') (8116 %°)
Corr. 81713 %° (4)
51113
MW -20A
4.0429356
10.38027
4.3179
6.1
6.1
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of NBS standard.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of NBS standard analysis.
Page 36 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_35
Client ID#
SW -06
Sample Date
4/18/2017
B (mg/L)
0.00706
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/28/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
SW -06
4.0833323
20.47591
0.9669
19.5
19.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 37 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_36
Client ID#
SWFBR-1
Sample Date
4/19/2017
B (mg/L)
0.0102
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/22/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
MBCF(4)
11 B/10B 57113 %o (8116 %u) Corr. 51713 %° lel
MBCF(4)
116/706 51113 %° (5116 %°)
Corr. 81713 %° lel
51113 %o
SWFBR-1
4.0832826 20.46349 0.9669 19.5
19.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 38 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_37
Client ID#
SWFBR-2
Sample Date
4/18/2017
B (mg/L)
0.0072
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/17/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
SWFBR-2
4.1056340
26.04938
0.9669
25.1
25.1
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 39 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_38
Client ID#
SWFBR-3
Sample Date
4/18/2017
B (mg/L)
0.00838
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/14/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
5"B %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
51113 %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
SWFBR-3
4.1140951
28.16392
0.9669
27.2
4.1111589
27.43012
0.9669
26.5
26.8
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 40 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_39
Client ID#
SWFBR-4
Sample Date
4/18/2017
B (mg/L)
0.00872
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/04/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/1OB
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/106
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
SWFBR-4
4.0832826
20.46349
0.9669
19.5
19.5
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 41 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_40
Client ID#
SWLJ-1
Sample Date
4/18/2017
B (mg/L)
0.0186
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/04/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
811B %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
SWLJ-1
4.1468940
36.36077
0.9669
35.4
35.4
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 42 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_42
Client ID#
8 HOYT
Sample Date
5/5/2017
B (mg/L)
<0.002
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 09/05/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
5"B %°
MBCF(') (013 %°)
Corr. 51713 %° (4)
116/706
51113 %°
I MBCF(') (8116 %°)
Corr. 51713 %° (4)
51113 %°
8 HOYT
4.1203628
29.73029
0.4340
29.3
4.1198618
29.60509
1 0.2274
29.4
29.3
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %°: Corrected S"B %° using MBCF
2. Precision of <±1.00 %° 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 43 of 54

NTETRATECH
Client: Duke Energy Carolinas LLC
Project: 114-021906_100
Contact: Zachary Hall
Tetra Tech, Inc
3801 Automation Way, Ste 100, Fort Collins, Colorado 80525
Ph 970-223-9600 Fax: [phone] www.tetratech.com
Certificate of Analysis
Lab ID#
021906_100_44
Client ID#
AS -9
Sample Date
5/5/2017
B (mg/L)
0.00411
Report Date: 09/25/17
Date Received: 04/20/17
Date Analyzed: 08/20/17
Individual Boron Isotopic Results (1,2,3)
Replicate 1
Replicate 2
Average
Client's ID#
11B/10B
57113 %u
MBCFI'1 (S"B %o)
Corr. S17B %0 (4)
116/706
51113 %a
MBCFI't (8"B %o)
Corr. S17B %. (4)
51113 %e
AS -9
4.1222879
30.21140
0.9669
29.2
4.1188103
29.34231
0.2274
29.1
29.2
Edward Muller, Project Scientist
Approved
NOTES:
1. S"B computed using NBS SRM 951 4. Corr. S"B %o: Corrected S"B %o using MBCF
2. Precision of <±1.00 %o 611B (1a) is given by the Standard Deviation from analysis of seawater.
3. Machine bias correction factor (MBCF) is machine and/or extraction bias using results of seawater analysis.
Page 44 of 54

QTETRA TECH
BDL
delta 11B a o)
NBS SRM 951
Tetra Tech
3801 Automation Way, Suite 100
Fort Collins, CO 80525
Tel [phone]
Fax [phone]
www.tetratech.com
REPORT DEFINITIONS
Below detection limit, in this context it means that the mass available for
analysis was too small to produce a reliable signal when analyzed in the mass
spectrometer.
Comparison of the ratio for "B/10B in a sample with the NBS standard reported
as a permil amount:
8' ' B (%o) = (11B/1013)sample — ,11B/loB, standard x1000.
(1 iB/10B)standard
National Bureau of Standards Standard Reference Material 951. The
internationally accepted boric acid standard with an isotopic ratio for 11B/"B of
1113/1013 of 4.0014 +/- 0.0027 (26) (Hemming and Hanson., 1994) in negative ion
mode.
MBCF Machine bias correction factor. The average value for the standards analyzed
with each batch of samples is normalized to the accepted isotopic ratio; this
correction is applied to the measurement for each sample in a given batch
analyzed in the mass spectrometer. Standard used include NBS SRM 951 and
seawater.
permil (%o) part per thousand
Precision The standard deviation of values obtained for MBCF is computed and reported
as the long-term precision of the isotopic measurement to 16 .
Replicate Repeated mass spectrometric analyses on different aliquots of the same
chemically processed material.
Seawater The boron isotopic composition of seawater is 39.61 %o as reported in Foster,
G.L., Pogge von Strandmann, P.A.E., Rae, J. W.B., 2010. Boron and magnesium
isotopic composition of seawater. Geochem. Geophys. Geosyst. 11, Q08015.
TIMS Thermal Ionization Mass Spectrometer. The instrument used in the Tetra Tech
laboratory is a TIMS VG 336, built by VG Isotopes Limited, Cheshire, England.
It uses an 18 cm, 60o extended geometry magnetic sector analyzer, with dual
Faraday bucket collectors.
Page 45 of 54
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TETRATECH
Tetra Tech
3801 Automation Way, Suite 100
Fort Collins, CO 80525
Tel [phone]
Fax [phone]
www.tetratech.com
BORON ISOTOPE LABORATORY
SAMPLE RECEIPT AND ACKNOWLEDGEMENT FORM
Client and Contact: Todd Plating, SynTerra
Sender's Co. and Contact: Ashely Albert, SynTerra
Date/Time Received: 4/20/17 10:30
Received By: Elissa Palmer
No. of Shipping Containers: 1
Carrier: Fed Ex
Samples:
Shipping Container Seal Intact: Yes
Sample Seals Intact: NA
No. Samples Received: 34 (bottles)
Samples in Good Condition: Yes
Chain of Custody Forms Included: Yes
Samples Labels Agree w/C of C: Yes
Tetra Tech Laboratory Numbers: 021096 101 to 021096 134
Date this form sent to client: 4/24/17
Edward Muller, P.G.
Phone: [phone] Fax: [phone] Mobile: [phone]
ed. muller(cDtetratech.com
Page 50 of 54
Version 11/30/11

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TETRATECH
Tetra Tech
3801 Automation Way, Suite 100
Fort Collins, CO 80525
Tel [phone]
Fax [phone]
www.tetratech.com
BORON ISOTOPE LABORATORY
SAMPLE RECEIPT AND ACKNOWLEDGEMENT FORM
Client and Contact: Todd Plating, SynTerra
Sender's Co. and Contact: Ashely Albert, SynTerra
Date/Time Received: 4/28/17 10:20
Received By: Alicia Shogbon
No. of Shipping Containers: 1
Carrier: Fed Ex
Samples:
Shipping Container Seal Intact: Yes
Sample Seals Intact: NA
No. Samples Received: 6 (bottles)
Samples in Good Condition: Yes
Chain of Custody Forms Included: Yes
Samples Labels Agree w/C of C: Yes
Tetra Tech Laboratory Numbers: 021096 135 to 021096 140
Date this form sent to client: 4/28/17
Edward Muller, P.G.
Phone: [phone] Fax: [phone] Mobile: [phone]
ed. muller(cDtetratech.com
Page 52 of 54
Version 11/30/11

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TETRATECH
Tetra Tech
3801 Automation Way, Suite 100
Fort Collins, CO 80525
Tel [phone]
Fax [phone]
www.tetratech.com
BORON ISOTOPE LABORATORY
SAMPLE RECEIPT AND ACKNOWLEDGEMENT FORM
Client and Contact: Todd Plating, SynTerra
Sender's Co. and Contact: Ashely Albert, SynTerra
Date/Time Received: 5/17/17 10:00
Received By: Ed Muller
No. of Shipping Containers: 1
Carrier: Fed Ex
Samples:
Shipping Container Seal Intact: Yes
Sample Seals Intact: NA
No. Samples Received: 5 (bottles)
Samples in Good Condition: Yes
Chain of Custody Forms Included: Yes
Samples Labels Agree w/C of C: Yes
Tetra Tech Laboratory Numbers: 021096 141 to 021096 145
Date this form sent to client: 5/19/17
Edward Muller, P.G.
Phone: [phone] Fax: [phone] Mobile: [phone]
ed. muller(cDtetratech.com
Page 54 of 54
Version 11/30/11

� ISOTOPE TRACER
TECHNOLOGIES INC
Approved by:
Orfan Shouakar-Stash, PhD
Director
Isotope Tracer Technologies Inc.
695 Rupert St. Unit B, Waterloo, ON, N2V 1Z5
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.it2isotopes.com
IT2 FILE #
170156
2017-08-25

1/2
f [S(l'1'0PE: TRACER
File Number: 170156
Project Number: 114-021906
Project Name: Duke/Ashville
Client: Tetra Tech Inc.
Address: 3801 Automation Way, Suite 100
Fort Collins, Colorado 80525
USA
Tel: [phone]
Fax: [phone]
Attn.: Ed Muller
E-mail: Ed.muller(@tetratech.com
#
Sample ID
Date
Time
Sample#
6345
Result
Repeat
SO4
VCDT
1
AMW-01B
4/12/2017
1435
45535
X
10.1
9.6
2
CB -01D
4/13/2017
928
45536
X
4.6
3
CB -05
4/6/2017
928
45537
X
9.6
4
CB-09BR
4/13/2017
934
45538
WNA
5
CCR-101BR
4/12/2017
1312
45539 1
X
7.4
7.9
6
MW-18BRL
4/6/2017
1506
45540
X
4.9
7
MW -18D
4/6/2017
1419
45541
X
4.8
4.2
8
MW -20A
4/7/2017
1019
45542
X
8.3
9
MW -24S
4/12/2017
1154
45543
WNA
10
CCR -102D
4/7/2017
953
45544
X
7.3
11
CCR -102S
4/7/2017
1028
45545
X
7.1
6.5
12
EXT -01
4/13/2017
1134
45546 1
X
7.0
13
GW -01
4/10/2017
1213
45547
X
3.9
4.5
14
GW-01BR
4/10/2017
1012
45548
X
7.9
8.0
15
GW -01D
4/10/2017
1051
45549
X
5.9
16
GW -02
4/11/2017
1541
45550
X
8.1
17
GW -03
4/11/2017
1021
45551
X
7.1
7.4
18
MW-05BR
4/13/2017
1205
45552
X
-4.5
-4.6
19
MW -05D
4/13/2017
1224
45553 1
X
7.2
20
MW-06BR
4/10/2017
1021
45554
X
12.7
13.3
21
MW -06D
4/10/2017
1226
45555
X
8.9
22
MW -06S
4/10/2017
1034
45556
X
7.9
23
MW -08S
4/7/2017
916
45557
X
7.3
7.6
24
MW-09BR
4/12/2017
1108
45558
X
8.7
25
MW -09D
4/12/2017
1053
45559
X
7.4
26
MW -10
4/11/2017
1440
45560 1
X
10.1
27
MW -16A
4/12/2017
1346
45561
X
8.8
8.8
28
MW-16BR
4/12/2017
1323
45562
X
9.1
29
MW-18BR
4/6/2017
1345
45563
X
4.8
30
SWFBR-1
4/19/2017
945
45564
X
7.9
8.2
31
SWFBR-2
4/18/2017
1130
45565
X
8.2
32
SWFBR-3
4/18/2017
1025
45566
X
7.9
33SWFBR-4
4/18/2017
945
45567
X
6.6
34
SWLJ-1
4/18/2017
1445
45568
X
6.7
35
SW -06
4/8/2017
1400
45569
X
10.2
Notes:
WNA: Was Not analyzed
34S SO4 Analyses
Instrument Used:
Isotope Ratio Mass Spectrometry (IRMS) - MAT 253, Thermo Scientific, Germany
Coupled with Elemental Analyzer (EA), Fisons Instruments, Italy
Standard Used:
IAEA -SO -6 / IT' -520 / IAEA -SO -5 / ITz-518 / NBS-127
Typical Standard deviation:
f0.5%o
Approved by:
o sow
Orfan Shouakar-Stash, PhD
Director
Isotope Tracer Technologies Inc.
695 Rupert St. Unit B, Waterloo, ON, N2V 1Z5
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.it2isotopes.com
695 Rupert St. Unit B - Waterloo - Ontario -N2V 1Z5 - Tel. [phone] - Fax: [phone] - www.it2isotopes.com
2017-08-25

2/2
2017-08-25
File Number: 170156
Project Number: 114-021906
#
Client: Tetra Tech Inc.
Date
Address: 3801 Automation Way, Suite 100
OPE TRACER
Fort Collins, Colorado 80525
%V1S19CT11N(),_()(AES INC
USA
StdDev (abs)
Tel: [phone]
Fax: [phone]
Attn.: Ed Muller
E-mail: Ed.muller([e-mail]
File Number: 170156
Project Number: 114-021906
#
Sample ID
Date
Time
Sample #
87Sr/"Sr
Result
StdErr (abs)
StdDev (abs)
1
AMW-01B
4/12/2017
1435
45535
X
0.726668
2.87119E-06
3.45737E-05
45535R
0.726672
3.36723E-06
4.01252E-05
2
CB -01D
4/13/2017
928
45536
X
0.722277
2.84408E-06
3.40103E-05
3
CB -05
4/6/2017
928
45537
X
0.720726
4.30281E-06
5.16337E-05
4
CB-09BR
4/13/2017
934
45538 1
X
0.726453
4.77555E-06
1 5.71073E-05
5
CCR-101BR
4/12/2017
1312
45539
X
0.717105
2.35592E-06
2.80740E-05
6
MW-18BRL
4/6/2017
1506
45540
X
0.722831
3.29783E-06
3.92982E-05
7
MW -18D
4/6/2017
1419
45541
X
0.722895
5.69698E-06
6.81260E-05
8
MW -20A
4/7/2017
1019
45542
X
0.718881
4.60887E-06
5.53064E-05
9
MW -24S
4/12/2017
1154
45543
X
0.721924
3.09484E-06
3.71381E-05
10
CCR -102D
4/7/2017
953
45544
X
0.711546
2.89594E-06
3.45091E-05
11
CCR -102S
4/7/2017
1028
1 45545
X
0.711245
2.08852E-06
2.48876E-05
12
EXT -01
4/13/2017
1134
45546
X
0.711272
4.75245E-06
5.66320E-05
13
GW -01
4/10/2017
1213
45547
14
GW-01BR
4/10/2017
1012
45548
X
0.725721
3.90965E-06
4.70784E-05
15
GW -01D
4/10/2017
1051
45549
16
GW -02
4/11/2017
1541
45550
X
0.713115
5.89121E-06
7.09396E-05
17
GW -03
4/11/2017
1021
45551 1
X
0.712245
2.96099E-06
3.54083E-05
18
MW-05BR
4/13/2017
1205
45552
X
0.719263
2.46591E-06
2.92811E-05
19
MW -05D
4/13/2017
1224
45553
X
0.722531
6.47301E-06
7.79454E-05
20
MW-06BR
4/10/2017
1021
45554
X
0.720120
5.86294E-06
7.03552E-05
21
MW -06D
4/10/2017
1226
45555
X
0.714367
4.91466E-06
5.85650E-05
22
MW -06S
4/10/2017
1034
45556
X
0.714371
5.52837E-06
6.61097E-05
45556R
0.714380
5.45018E-06
6.58547E-05
23
MW -08S
4/7/2017
916
45557
X
0.711332
3.54575E-06
4.24010E-05
241
MW-09BR
4/12/2017
1108
45558
X
0.724034
3.85784E-06
4.62941E-05
25
MW -09D
4/12/2017
1053
45559
X
0.712884
5.51549E-06
6.61859E-05
26
MW -10
4/11/2017
1440
45560
X
0.721444
3.51010E-06
4.19747E-05
27
MW -16A
4/12/2017
1346
45561
X
0.718518
5.43769E-06
6.43397E-05
28
MW-16BR
4/12/2017
1323
1 45562
X
0.719964
3.62077E-06
4.34493E-05
29
MW-18BR
4/6/2017
1345
45563
X
0.726734
6.89083E-06
8.26900E-05
30
SWFBR-1
4/19/2017
945
45564
X
0.716849
3.34011E-06
3.98020E-05
31
SWFBR-2
4/18/2017
1130
45565
X
0.716809
4.45327E-06
5.32534E-05
32
SWFBR-3
4/18/2017
1025
45566
X
0.716895
7.54735E-06
9.02532E-05
33
SWFBR-4
4/18/2017
945
45567
X
0.716706
5.68458E-06
6.82149E-05
34
SWLJ-1
4/18/2017
1445
45568
X
0.718267
3.49340E-06
4.23552E-05
35
SW -06
4/8/2017
1400
45569
X
0.718253
3.01194E-06
3.61433E -OS
87Sr ANALYSES
Instrument Used:
Thermal Ionization Mass Spectrometry (TIMS), Triton, Thermoscientific, Germany
Standard Used:
NIST -987
Typical Standard deviation:
±0.0001
Approved by:
o =
Orfan Shouakar-Stash, PhD
Director
Isotope Tracer Technologies Inc.
695 Rupert St. Unit B, Waterloo, ON, N2V 1Z5
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.it2isotopes.com
695 Rupert St. Unit B - Waterloo - Ontario -N2V 1Z5 - Tel. [phone] - Fax: [phone] - www.it2isotopes.com

� ISOTOPE TRACER
TECHNOLOGIES INC
Approved by:
Orfan Shouakar-Stash, PhD
Director
Isotope Tracer Technologies Inc.
695 Rupert St. Unit B, Waterloo, ON, N2V 1Z5
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.it2isotopes.com
IT2 FILE #
170187(B)
2017-09-26

1/1
JISOTOPE TRACER
TECHNOLOGIES INC
File Number: 170187(Bl
Proiect Number: 114-021906
Project Name: Duke/Ashville
2017-09-26
Client: Tetra Tech Inc.
Address: 3801 Automation Way, Suite 100
Fort Collins, Colorado 80525
USA
Tel: [phone]
Fax: [phone]
Attn.: Ed Muller
E-mail: [e-mail]
#
Sample ID
Date
Time
Sample #
$'Sr/"Sr
Result
StdErr (abs)
StdDev (abs)
13
AMW-03B
4/12/2017
942
46001
X
0.726005
5.53406E-06
6.61778E-05
14
CB -09
4/13/2017
1004
46002
X
0.718069
4.82611E-06
5.75097E-05
15
CB-09SL
4/13/2017
1110
46003
X
0.718057
6.48906E-06
7.70534E-05
16
GW -01D
4/10/2017
1051
46004
X
0.722078
1 8.76841E-06 I1.04119E
04
87Sr ANALYSES
Instrument Used:
Thermal Ionization Mass Spectrometry (TIMS), Triton, Thermoscientific, Germany
Standard Used:
NIST -987
Typical Standard deviation:
±0.0001
Approved by:
Orfan Shouakar-Stash, PhD
Director
Isotope Tracer Technologies Inc.
695 Rupert St. Unit B, Waterloo, ON, N2V 1Z5
Tel: [phone] Fax: [phone]
Email: [e-mail]
Website: www.it2isotopes.com
695 Rupert St. Unit B - Waterloo - Ontario -N2V 1Z5 - Tel. [phone] - Fax: [phone] - www.it2isotopes.com

Environmental Isotope Laboratory Room 208 Gould -Simpson Building
Geosciences Department [phone]
University of Arizona [e-mail]
Data report for:
Ed Muller 8 -May -17
Tetra Tech Inc.
3801 Automation Way
Fort Collins CO 80525
Project # 114-021906
REPORT OF ANALYSES
34 sample for H and O isotopes in water and tritium
W
Sample
Date Time 5180%.
SD %u
vsmow
vsmow
W66583
AMW-01B
-3.3
-21.1
W66584
AMW-03B
-6.4
-37.5
W66585
CB -01
-5.9
-31.8
W66586
CB -01D
-6.2
-34.1
W66587
CB -04B
-2.9
-21.7
W66588
CB -05
-3.9
-23.7
W66589
CB -09
-3.3
-20.8
W66590
CB-09BR
-2.4
-18.2
W66591
CB-09SL
-2.8
-19.3
W66592
CCR-101BR
-3.4
-22.9
W66593
CCR -102D
-2.1
-18.4
W66594
CCR -102S
-2.5
-19.4
W66595
EXT -01
-1.8
-17.5
W66596
GW -01
-3.0
-21.2
W66597
GW -01 BR
-6.1
-35.7
W66598
GW -01D
-2.9
-20.9
W66599
GW -02
-2.5
-18.6
W66600
GW -03
-3.6
-23.4
W66601
MW-05BR
-5.0
-30.2
W66602
MW -05D
-3.8
-24.4
W66603
MW-06BR
-5.4
-32.6
W66604
MW -06D
-1.6
-14.8
W66605
MW -06S
-1.3
-14.0
W66606
MW -08S
-2.4
-18.9
W66607
MW-09BR
-2.6
-20.8
W66608
MW -09D
-3.4
-24.2
W66609
MW -10
-6.0
-33.7
W66610
MW -16A
-4.5
-27.6
W66611
MW-16BR
-5.2
-29.9
W66612
MW-18BR
-2.8
-20.1
W66613
MW-18BRL
-5.6
-34.6
W66614
MW -18D
-3.0
-20.7
W66615
MW -20A
-2.0
-13.3
W66616
MW -24S
-6.1
-35.5
Analytical precision (10)
David Dettman
Research Scientist
1 of 1
0.10 1.0

Environmental Isotope Laboratory
Geosciences Department
University of Arizona
Data report for:
Ed Muller
Tetra Tech Inc.
3801 Automation Way
Fort Collins CO 80525
Room 208 Gould -Simpson Building
[phone]
[e-mail]
21 August 2017
Project # 114-021906, Duke Ashville
In Progress
REPORT OF ANALYSES
5 samples for H and O isotopes in water and 5 for tritium
W Sample
Date
Time
6180%0
bD %o
VsMOw
VSMOw
W66818 8 HOYT
5/5/2017
-6.0
-33.0
W66819 25 HOYT
5/5/2017
-6.8
-38.6
W66820 AS9
5/5/2017
-6.3
-37.0
W66821 42 HOYT
5/5/2017
-5.9
-32.9
W66822 44 HOYT
5/5/2017
-6.2
-34.4
Analytical precision (1 a)
0.10
1.0
REPORT OF ANALYSES - TRITIUM
5 water samples for tritium
T activity at collection date
AT Sample
Tritium, TU
Error, TU
AT5688 8 HOYT
4.3
0.26
0
AT5689 25 HOYT
1.2
0.25
0
AT5690 AS9
1.9
0.31
0
AT5691 42 HOYT
4.4
0.24
0
AT5692 44 HOYT
3.5
0.24
0
Detection Limit, 9.5 x enrichment, 1500 minutes count 0.4
Explanation of tritium data: The detection limit, 0.4 TU, is calculated as 0 + 2 sigma for low -counting
samples, and applies for 10 -fold enrichment and 1500 minutes of counting. Lower limits are
possible for higher enrichment factors.
A sample with a mean calculated TU value between 0 and 1 sigma , say 0.20 ± 0.35 TU, is reported
thus: <0.9 TU (= 0.2 + 2 x 0.35). A sample with a mean calculated TU value between 1 and
2 sigma , say 0.51 ± 0.38, is reported thus: <1.3 (Apparent 0.5), where 1.3 = 0.51 + 2 x 0.38, rounded.
Samples with calculated TU values greater than 2 are reported thus: 1.1 ± 0.4 TU.
David Dettman
Research Scientist
1 of 1

Environmental Isotope Laboratory Room 208 Gould -Simpson Building
Geosciences Department [phone]
University of Arizona [e-mail]
Data report for:
Ed Muller 6 July 2017
Tetra Tech Inc.
3801 Automation Way
Fort Collins CO 80525
Project # 114-021906
REPORT OF ANALYSES
34 water samples for tritium
T activity at collection date
AT Sample
Tritium, TU
Error, TU
AT5624 AMW-01B
3.7
0.23
AT5625 AMW-03B
5.7
0.26
AT5626 CB -01
4.3
0.23
AT5627 CB -01D
4.5
0.26
AT5628 CB -04B
4.0
0.26
AT5629 CB -05
4.7
0.2
AT5630 CB -09
3.6
0.23
AT5631 CB-09BR
5.4
0.31
AT5632 CB-09SL
4.4
0.27
AT5633 CCR-101BR
4.0
0.24
AT5634 CCR -102D
4.9
0.27
AT5635 CCR -1028
3.8
0.23
AT5636 EXT -01
4.4
0.28
AT5637 GW -01
3.8
0.23
AT5638 GW-01BR
5.7
0.25
AT5639 GW-OiD
4.5
0.24
AT5640 GW -02
4.2
0.23
AT5641 GW -03
5.2
0.26
AT5642 MW-05BR
4.3
0.25
AT5643 MW -05D
4.5
0.21
AT5644 MW -068R
1.1
0.23
AT5645 MW -06D
4.3
0.29
AT5646 MW -06S
4.5
0.25
AT5647 MW -08S
4.1
0.23
AT5648 MW-09BR
3.9
0.21
AT5649 MW -09D
3.9
0.24
AT5650 MW -10
4.2
0.2
AT5651 MW -16A
5.2
0.29
AT5652 MW-16BR
4.4
0.23
AT5653 MW-18BR
4.5
0.4
AT5654 MW-18BRL
1.7
0.24
AT5655 MW -18D
4.5
0.24
AT5656 MW -20A
5.0
0.25
AT5657 MW -24S
4.4
0.42
Detection Limit, 9.5 x enrichment, 1500 minutes count 0.4
Explanation of tritium data: The detection limit, 0.4 TU, is calculated as 0 + 2 sigma for low -counting
samples, and applies for 10 -fold enrichment and 1500 minutes of counting. Lower limits are
possible for higher enrichment factors.
A sample with a mean calculated TU value between 0 and 1 sigma, my 0.20± 0.35 TU, is reported
thus: <0.9 TU (= 0.2 + 2 x 0.35). A sample with a mean calculated TU value between 1 and
2 sigma ,say 0.51 ± 0.38, is reported thus: -1.3 (Apparent 0.5), where 1.3 = 0.51 + 2 x 0.38, rounded.
Samples with calculated TU values greater than 2 are reported thus: 1.1 ± 0.4 TU.
David L. Dettman
Research Scientist
Director Environmental Isotope Laboratory
1 of