NCS000546_Tier III Action Plan with Email_20221115

Georgoulias, Bethany
From: Glenn, Elizabeth <[e-mail]>
Sent: Tuesday, November 15, 2022 9:34 AM
To: Khan, Zahid
Cc: Georgoulias, Bethany
Subject: [External] Allen Steam Station NCS000546 - Tier III Action Plan
Attachments: AIIenISWActionPlan016010 111422 - T3.pdf
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Report Spam.
Mr. Khan —
Please accept the attached Action Plan for the subject station.
Let us know if you have any questions.
Thank you,
J. Elizabeth Glenn
Permitting & Compliance
Duke Energy, Environmental Services
Office: [phone]
1

4 DUKE
ENERGY
November 14, 2022
NC Department of Environmental Quality
Division of Energy, Mineral, and Land Resource
610 East Center Avenue, Suite 301
Mooresville, NC 28115
Subject: Action Plan: Tier III Exceedances for SW 010 & 016
Allen Steam Station
Permit No: NCS000546
Gaston County
Dear Mr. Khan:
Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
Duke Energy respectfully submits the Action Plan, required as by Part D, Section D-7 of the
subject permit.
Should you have any questions regarding this submittal or require additional information, please
contact Elizabeth Glenn at [phone] or email [e-mail].
1 certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. 1 am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations.
Sinc ely,
Jeffre D. FI agan
General Manager III
Allen Steam Station
Enclosures

(.-� Cardna�

Contact Information
Cardno now Stantec
534 Industrial Park Road,
Bluefield, VA 24605
Telephone: [phone]
www.cardno.com
Action Plan
Allen Steam Station: Belmont, NC
Prepared for: Duke Enerav
Document Information
�� DUKE
Prepared for ENERGY®
Randy Gantt
Duke Energy
253 Plant Allen Road, Belmont, NC
Project Name Allen Steam Station
Action Plan: Tier III Benchmark
Exceedances
Author(s) Joshua Sexton
Senior Geologist for Cardno now Job Reference 238000559
Stantec Date November 2022
© Cardno. Copyright in the whole and every part of this document belongs to Cardno and may not be used, sold, transferred,
copied or reproduced in whole or in part in any manner or form or in or on any media to any person other than by agreement with
Cardno.
This document is produced by Cardno solely for the benefit and use by the client in accordance with the terms of the engagement.
Cardno does not and shall not assume any responsibility or liability whatsoever to any third party arising out of any use or reliance
by any third party on the content of this document.
November 2022 Cardno now Stantec
Action Plan

Action Plan: Tier III Benchmark Exceedances
Allen Steam Station — Belmont, NC
Prepared for: Duke Enerov
Table of Contents
1 Exceedance Documentation............................................................................................................ 1
1.1 SW010................................................................................................................................. 1
1.2 SWO16................................................................................................................................. 1
2 Inspection Report..............................................................................................................................2
3 Review................................................................................................................................................ 2
3.1 SW010.................................................................................................................................2
3.2 SWO16.................................................................................................................................2
4 Action Plan.........................................................................................................................................3
4.1 SW010................................................................................................................................. 3
4.2 SWO16................................................................................................................................. 3
5 Monitoring Plan................................................................................................................................. 3
5.1 SW010................................................................................................................................. 3
5.2 SWO16................................................................................................................................. 3
Tables
Table 1 — Historical Analytical Results - Outfall SWO10
Table 2 — Historical Analytical Results - Outfall SWO16
Appendices
Appendix A — Analytical Laboratory Reports
Appendix B — Inspection Report
Appendix C — Best Management Practices
November 2022 Cardno now Stantec ii
Tier III Action Plan 11-2022 DRAFT

Action Plan: Tier III Benchmark Exceedances
Allen Steam Station - Belmont, NC
Prepared for: Duke Enerav
1 Exceedance Documentation
1.1 SW010
Outfall SW010 exceeded the benchmark standard for copper for the September 30, 2022 stormwater
sample collection. Laboratory results from this sampling event were received on October 17, 2022 and
are included as Appendix A. SW010 entered into Tier III status for copper on November 2, 2018. Most
recent benchmark exceedances for SW010 are included below. Historical analytical results are presented
as Table 1 in the Appendix.
SW010
Cu (mg/L) I
Date
Value Benchmark
September 21, 2021 0.0123 0.0100
February 23, 2022 0.0171 0.0100
March 16, 2022 0.0244 0.0100
September 30, 2022 0.0115 0.0100
1.2 SWO16
Outfall SWO16 exceeded the benchmark standard for copper and total suspended solids (TSS) for the
September 30, 2022 stormwater sample collection. Laboratory results from this sampling event were
received on October 17, 2022 and are included as Appendix A. SWO16 entered into Tier III status for
copper on November 2, 2018 and TSS on November 12, 2019. Most recent benchmark exceedances for
SWO16 are included below. Historical analytical results are presented as Table 2 in the Appendix.
SWO16
I
Cu
(mg/L)
TSS (mg/L)
Date
Value
Benchmark
Value
Benchmark
November 11, 2020
0.0153
0.0100
140
100
February 23, 2022
10.0346
0.0100
600
100
�
March 16, 2022 10.0200
0.0100
j
310
J
100
September 30, 2022
0.0179
0.0100
270
100
November 2022 Cardno now Stantec 1
Tier III Action Plan 11-2022 DRAFT

Action Plan: Tier III Benchmark Exceedances
Allen Steam Station - Belmont, NC
Prepared for: Duke Enerav
2 Inspection Report
Cardno and Duke staff conducted a thorough inspection of SW010 and SW016 drainage basins on
October 27, 2022. This report is included as Attachment B.
3 Review
3.1 SW010
The drainage area for SW010 is comprised of a paved alley next to the powerhouse, rail lines
immediately east of the powerhouse, a gravel drive downgradient of the rail line and a grassed
embankment located between the rail lines and the intake structure. The area contains approximately
1,280 linear feet of rail lines.
Train cars carrying coal and limestone use the rail lines that pass through this drainage basin. Duke
Energy enforces procedures to minimize tracking of fugitive coal dust. Vehicular and equipment traffic is
also present in the drainage basin. All mobile equipment operating on the plant site is inspected to
ensure overall integrity of the body and any containers present. Best Management Practices (BMPs)
details are outlined in Appendix C, Best Management Practices.
Prior to the October 27, 2022 site visit, drop inlets in the paved alley immediately adjacent to the
powerhouse were not known to connect to the SWO10 conveyance piping. Tracking of coal and potential
combustion material is occurring in the alley. It is believed that these drop inlets may be the source of
benchmark exceedances. A sediment sample from one of the drop -inlets has been collected to confirm.
Analytical results are pending.
3.2 SWO16
The drainage area for SW016 encompasses primarily vegetated upland areas along the site access road
south of the discharge canal. The drainage area includes approximately 1,700 linear feet of the paved
access road, and approximately 1,000 linear feet of the paved road utilized to haul ash. Haul trucks use
the road to transport ash from the dry ash handling facility to the ash landfill. The drainage area also
includes 700 linear feet of paved road south of the access road, approximately 1,000 linear feet of dirt
roads north of the access road, and a gravel -surfaced laydown and equipment parking area north of the
access road.
Ash and soil are transported through this drainage basin. Duke Energy enforces procedures to minimize
tracking of fugitive dust. Inspection of hauling vehicles for covers, tailgate seals and overall integrity is
required. Materials storage areas are also required to be covered with water resistant materials. BMP
details are outlined in Appendix C.
During the October 27, 2022 inspection, it was noted that haulage and construction activities were not
following BMP practices. Sediment from truck traffic and construction activities was present in the
stormwater conveyance system. Crossings were not being actively maintained and sediment was not
being removed from conveyance ditches or roadways. Additionally, denuded ground from construction
activity was not stabilized and erosion and control structures were not properly installed.
November 2022 Cardno now Stantec
Tier III Action Plan 11-2022 DRAFT

Action Plan: Tier III Benchmark Exceedances
Allen Steam Station - Belmont, NC
Prepared for: Duke Enerav
4 Action Plan
4.1 SW010
Sediment and stormwater samples should be collected and analyzed from alley drop inlets to determine if
elevated metals constituents are present. If this is the case a smoke test should be conducted to
determine all drop inlets connected to the stormwater system west of the rail lines. Identified drop inlets
will then be either sealed or diverted to the coal yard sump. Existing subsurface stormwater piping should
then be jetted to clear metals enriched sediment buildup from the conveyance structure. Jetted material
should be evacuated from a downstream drop inlet and not allowed to discharge from the outfall.
4.2 SWO16
Sediment removal from conveyance ditches along Plant Allen Road should be undertaken. Crossings
need to be adequately maintained with crushed stone to limit sediment tracking across Plant Allen Road.
Sediment needs to be consistently removed from the crossing when fouling occurs and immediately
before precipitation events.
Construction areas need proper erosion and sediment controls installed immediately. Stabilization of
denuded ground should then be conducted to limit future sediment impacts to stormwater.
5 Monitoring Plan
5.1 SW010
Following determination of enriched copper inputs and mitigation efforts, stormwater samples should be
collected monthly as required under Tier III status to monitor impacts (if any) to stormwater discharge.
5.2 SWO16
Implementation of BMPs noted in the action plan should limit sediment input to the basin. Onsite staff
should perform checks weekly and before precipitation events to confirm BMPs are adequately being
implemented. Stormwater samples should be collected monthly to confirm benchmarks are not
exceeded.
November 2022 Cardno now Stantec
Tier III Action Plan 11-2022 DRAFT

Action Plan: Tier III Benchmark
Exceedances
Belmont, NC

Table 1
Historical Analytical Results - Outfall SW010
24"CMP to Catawba River (Lake Wylie) - Draining RR.
WOW
8/19/2015
0.52
6.8
38
0.011
Tier I (Cu)
11/30/15
1.79
6.6
36
0.0076
12/20/2017
0.4
7.0
220
0.02720
4/23/2018
1.96
7.6
99
1 0.0180
Tier 11 (Cu), begin monthly
10/10/2018
0.80
8.3
6.2
0.00543
11/2/2018
0.53
7.9
410
12/20/2018
1.49
8.0
700
6/7/2019
1.06
8.3
8.2
11/12/2019
0.59
8.0
1/24/2020
3/3/2020
0.91
0.83
6.1
6.9
5/27/2020
1.46
6.3
i
6/16/2020
0.51
6.1
8/21/2020
9/17/2020
11/11/2020
0.43
1.86
0.46
6.8
7.2
8.1
•
.
12/14/2020
0.43
7.2
i
1/25/2021
2/11/2021
0.31
0.46
7.5
7.4
•
: •
3/16/2021
1.07
8.0
i
5/3/2021
7/8/2021
0.56
0.31
7.9
8.2
•
Moll
8/2021
No Flow
9/21/2021
0.36
7.2
01/2022
No Flow
2/23/2022
0.43
8.0
3/16/2022
1.05
8.4
04-08/2022
No Flow
9/30/2022
2.12
6.7
1 0 1 4,7MlI
1st Tier III under permit renewal
SU - standard units Tier I
mg/L - milligrams per liter Tier
ug/L - micrograms per liter
ng/L - nanograms per liter

Table 2
Historical Analytical Results - Outfall SWO16
36"CMP to discharge canal to South Fork Catawba
River - Draining paved/gravel/dirt roads, and ash haul
road.
1/15/16
1.15
8.2
360
0.02140
Tier I (TSS, Cu)
5/17/16
0.77
7.0
240
0.01480
Tier II (TSS, Cu) begin monthly
6/15/2016
0.43
7.9
230
0.0163
7/21/2016
0.24
7.0
48
0.00768
9/1/2016
1.25
8.1
100
0.00705
4/3/2017
0.36
Not Accessible
12/20/2017
0.4
7.4
Tier III (TSS, Cu)
3/6/2018
0.51
8.9
10/10/2018
0.80
1 0.53
7.9
7.0
:.
.:
0 oil
1 I M •
11/2/2018
12/20/2018
4/2/2019
1 1.49
0.11
5.9
7.6
6/7/2019
1.06
7.3
11/12/2019
1/24/2020
0.59
0.91
7.5
6.9
0 Is
Is IS
3/3/2020
1 0.83
7.1
M • l
5/27/2020
1.46
6.7
of
6/16/2020
0.51
7.6
of
8/21/2020
0.43
7.0
Is
9/17/2020
11/11/2020
1.86
0.46
7.5
7.9
1 9
12/14/2020
0.43
7.3
1/25/2021
2/11/2021
0.31
0.46
7.6
7.6
3/16/2021
5/3/2021
1.07
0.56
8.2
6.3
7/8/2021
0.31
8.2
8/3/2021
9-12/2021
0.16 1 8.1
No Flow
01/2022
No Flow
2/23/2022
0.43
8.4
1i
3/16/2022
1.05
8.0
04-08/2022
No Flow
9/30/2022
2.12
7.0
1
1 PUA
11st Tier III under permit renewal
SU - standard units Tier I
mg/L - milligrams per liter Tier 11
ug/L - micrograms per liter Tier III
ng/L - nanograms per liter

Action Plan: Tier III Benchmark
Exceedances
Belmont, NC
i:

DUKE Analytical Laboratory
ENERGY
13339 Hagers Ferry Road
Huntersville, NC 28078-7929
McGuire Nuclear Complex - MG03A2
Phone:[phone] Fax:[phone]
Order Summary Report
Order Number: J22100047
Project Name: ALLEN - NPDES STORMWATER
EquisTaskCode:
Customer Name(s): Robert Wylie, Randy Gantt, Chuck Cline, Sally Suddreth, Robbin Jolly, George R
Customer Address: Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
Lab Contact: Jason Robinson Phone: [phone]
Report Authorized By: 9'_/�Date: 10/17/2022
(Signature) -
J on Robinson
Program Comments:
Please contact the Program Manager (Jason Robinson) with any questions regarding this report.
Data Flags & Calculations:
1 of 55
Any analytical tests or individual analytes within a test flagged with a Qualifier indicate a deviation from the method quality
system or quality control requirement. The qualifier description is found at the end of the Certificate of Analysis (sample results)
under the qualifiers heading. All results are reported on a dry weight basis unless otherwise noted. Subcontracted data
included on the Duke Certificate of Analysis is to be used as information only. Certified vendor results can be found in the
subcontracted lab final report. Duke Energy Analytical Laboratory subcontracts analyses to other vendor laboratories that have
been qualified by Duke Energy to perform these analyses except where noted.
Data Package:
This data package includes analytical results that are applicable only to the samples described in this narrative. An estimation of
the uncertainty of measurement for the results in the report is available upon request. This report shall not be reproduced, except
in full, without the written consent of the Analytical Laboratory. Please contact the Analytical laboratory with any questions. The
order of individual sections within this report is as follows:
Job Summary Report, Sample Identification, Technical Validation of Data Package, Analytical Laboratory Certificate of Analysis,
Analytical Laboratory QC Reports, Sub -contracted Laboratory Results, Customer Specific Data Sheets, Reports &
Documentation, Customer Database Entries, Test Case Narratives, Chain of Custody (COC)
Certification:
The Analytical Laboratory holds the following State Certifications : North Carolina (DENR) Certificate #248, South Carolina
(DHEC) Laboratory ID # 99005. Contact the Analytical Laboratory for definitive information about the certification status of
specific methods.

Sample ID's & Descriptions:
2 of 55
Sample ID Plant/Station
2022025935
2022025936
2022025937
2022025938
2022025939
2022025940
2022025941
7 Total Samples
Collection
Date and Time Collected By
Sample Description
ALLEN
30-Sep-22
11:10 AM
Josh Sexton
SWO08
ALLEN
30-Sep-22
10:00 AM
Josh Sexton
SW010
ALLEN
30-Sep-22
10:25 AM
Josh Sexton
SWO15
ALLEN
30-Sep-22
11:45 AM
Josh Sexton
SWO16
ALLEN
30-Sep-22
10:25 AM
Josh Sexton
Hg Dup
ALLEN
30-Sep-22
10:45 AM
Josh Sexton
HG Field Blank
ALLEN
30-Sep-22
10:50 AM
Josh Sexton
Hg Trip Blank

3 of 55
Technical Validation Review
Checklist:
COC and .pdf report are in agreement with sample totals❑ Yes ❑ No
and analyses (compliance programs and procedures).
All Results are less than the laboratory reporting limits. ❑ Yes 0 No
All laboratory QA/QC requirements are acceptable. 0 Yes ❑ No
Report Sections Included:
Job Summary Report
0 Sample Identification
0 Technical Validation of Data Package
0 Analytical Laboratory Certificate of Analysis
❑ Analytical Laboratory QC Report
0 Sub -contracted Laboratory Results
❑ Customer Specific Data Sheets, Reports, & Documentation
❑ Customer Database Entries
❑ Chain of Custody
❑ Electronic Data Deliverable (EDD) Sent Separately
Reviewed By: Jason Robinson Date: 10/17/2022

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: SWO08
Collection Date: 09/30/2022 11:10 AM
Sample #: 2022025935
Matrix: NPDES
Analyse Result Units Qualifiers RDL DF Method
OIL AND GREASE IN WATER - SOLID PHASE EXTRACTION - (Analvsis Performed by Pace Laboratories
Vendor Parameter
Complete
Vendor Method
MERCURY IN WATER - (Analysis Performed by
Pace Labs)
Vendor Parameter
Complete
Vendor Method
TOTAL RECOVERABLE METALS BY ICP - Q22100037
Boron (B)
0.072
mg/L
0.05
1
EPA 200.7
Calcium (Ca)
26.4
mg/L
0.05
1
EPA 200.7
Magnesium (Mg)
2.06
mg/L
0.02
1
EPA 200.7
Total Hardness (Ca and Mg)
74.5
mg/L
0.05
1
EPA 200.7
(CaCO3)
Zinc (Zn)
0.021
mg/L
0.005
1
EPA 200.7
TOTAL RECOVERABLE METALS BY ICP-MS - 022100040
Antimony (Sb)
< 1
ug/L
1
1
EPA 200.8
Arsenic (As)
1.09
ug/L
1
1
EPA 200.8
Beryllium (Be)
< 1
ug/L
1
1
EPA 200.8
Cadmium (Cd)
< 1
ug/L
1
1
EPA 200.8
Chromium (Cr)
< 1
ug/L
1
1
EPA 200.8
Copper (Cu)
6.13
ug/L
2
1
EPA 200.8
Lead (Pb)
< 1
ug/L
1
1
EPA 200.8
Nickel (Ni)
1.01
ug/L
1
1
EPA 200.8
Selenium (Se)
3.18
ug/L
1
1
EPA 200.8
Silver (Ag) Low Level
< 0.3
ug/L
0.3
1
EPA 200.8
Thallium (TI) Low Level
< 0.2
ug/L
0.2
1
EPA 200.8
Total Suspended Solids - Low RL 2.5 - 022100024
TSS
9.0
mg/L
2.5
1
SM2540D
4 of 55
Analysis Date/Time Analyst
V_PACE
V_SHEALY
10/06/202212:44
CELL106
10/06/202212:44
CELL106
10/06/202212:44
CELL106
10/06/202212:44
CELL106
10/06/202212:44 CELL106
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/06/202213:18
MHALL3
10/04/2022 07:47 EBATIAN

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: SWO10
Collection Date: 09/30/2022 10:00 AM
Sample #: 2022025936
Matrix: NPDES
Analyse Result Units Qualifiers RDL DF Method
OIL AND GREASE IN WATER - SOLID PHASE EXTRACTION - (Analvsis Performed by Pace Laboratories
Vendor Parameter
Complete
Vendor Method
MERCURY IN WATER - (Analysis Performed by
Pace Labs)
Vendor Parameter
Complete
Vendor Method
TOTAL RECOVERABLE METALS BY ICP - Q22100037
Boron (B)
< 0.05
mg/L
0.05
1
EPA 200.7
Calcium (Ca)
23.5
mg/L
0.05
1
EPA 200.7
Magnesium (Mg)
1.94
mg/L
0.02
1
EPA 200.7
Total Hardness (Ca and Mg)
66.7
mg/L
0.05
1
EPA 200.7
(CaCO3)
Zinc (Zn)
0.032
mg/L
0.005
1
EPA 200.7
TOTAL RECOVERABLE METALS BY ICP-MS - 022100040
Antimony (Sb)
< 1
ug/L
1
1
EPA 200.8
Arsenic (As)
3.23
ug/L
1
1
EPA 200.8
Beryllium (Be)
< 1
ug/L
1
1
EPA 200.8
Cadmium (Cd)
< 1
ug/L
1
1
EPA 200.8
Chromium (Cr)
< 1
ug/L
1
1
EPA 200.8
Copper (Cu)
11.5
ug/L
2
1
EPA 200.8
Lead (Pb)
< 1
ug/L
1
1
EPA 200.8
Nickel (Ni)
1.69
ug/L
1
1
EPA 200.8
Selenium (Se)
8.73
ug/L
1
1
EPA 200.8
Silver (Ag) Low Level
< 0.3
ug/L
0.3
1
EPA 200.8
Thallium (TI) Low Level
< 0.2
ug/L
0.2
1
EPA 200.8
Total Suspended Solids - Low RL 2.5 - 022100024
TSS
12
mg/L
3.9
1
SM2540D
5 of 55
Analysis Date/Time Analyst
V_PACE
V_SHEALY
10/06/202212:49
CELL106
10/06/202212:49
CELL106
10/06/202212:49
CELL106
10/06/202212:49
CELL106
10/06/202212:49 CELL106
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/06/202213:27
MHALL3
10/04/2022 07:47 EBATIAN

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: SWO15
Collection Date: 09/30/2022 10:25 AM
Sample #: 2022025937
Matrix: NPDES
Analyse Result Units Qualifiers RDL DF Method
OIL AND GREASE IN WATER - SOLID PHASE EXTRACTION - (Analvsis Performed by Pace Laboratories
Vendor Parameter
Complete
Vendor Method
MERCURY IN WATER (AVERAGE)
-
Mercury Average
1.50
ng/L
0.5
1
Calculation
MERCURY IN WATER - (Analysis Performed by
Pace Labs)
Vendor Parameter
Complete
Vendor Method
TOTAL RECOVERABLE METALS BY ICP - 022100037
Boron (B)
0.732
mg/L
0.05
1
EPA 200.7
Calcium (Ca)
35.6
mg/L
0.05
1
EPA 200.7
Magnesium (Mg)
4.93
mg/L
0.02
1
EPA 200.7
Total Hardness (Ca and Mg)
109
mg/L
0.05
1
EPA 200.7
(CaCO3)
Zinc (Zn)
< 0.005
mg/L
0.005
1
EPA 200.7
TOTAL RECOVERABLE METALS BY ICP-MS 022100040
Antimony (Sb)
< 1
ug/L
1
1
EPA 200.8
Arsenic (As)
< 1
ug/L
1
1
EPA 200.8
Beryllium (Be)
< 1
ug/L
1
1
EPA 200.8
Cadmium (Cd)
< 1
ug/L
1
1
EPA 200.8
Chromium (Cr)
< 1
ug/L
1
1
EPA 200.8
Copper (Cu)
< 2
ug/L
2
1
EPA 200.8
Lead (Pb)
< 1
ug/L
1
1
EPA 200.8
Nickel (Ni)
< 1
ug/L
1
1
EPA 200.8
Selenium (Se)
< 1
ug/L
1
1
EPA 200.8
Silver (Ag) Low Level
< 0.3
ug/L
0.3
1
EPA 200.8
Thallium (TI) Low Level
< 0.2
ug/L
0.2
1
EPA 200.8
Total Suspended Solids - Low RL 2.5 - Q22100024
TSS
< 2.5
mg/L
2.5
1
SM2540D
6 of 55
Analysis Date/Time Analyst
V_PACE
V_SHEALY
10/06/202212:53
CELL106
10/06/202212:53
CELL106
10/06/202212:53
CELL106
10/06/202212:53
CELL106
10/06/202212:53 CELL106
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/06/202213:35
MHALL3
10/04/2022 07:47 EBATIAN

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: SWO16
Collection Date: 09/30/2022 11:45 AM
Sample #: 2022025938
Matrix: NPDES
Analyse Result Units Qualifiers RDL DF Method
OIL AND GREASE IN WATER - SOLID PHASE EXTRACTION - (Analvsis Performed by Pace Laboratories
Vendor Parameter
Complete
Vendor Method
MERCURY IN WATER - (Analysis Performed by
Pace Labs)
Vendor Parameter
Complete
Vendor Method
TOTAL RECOVERABLE METALS BY ICP - Q22100037
Boron (B)
< 0.05
mg/L
0.05
1
EPA 200.7
Calcium (Ca)
36.4
mg/L
0.05
1
EPA 200.7
Magnesium (Mg)
9.24
mg/L
0.02
1
EPA 200.7
Total Hardness (Ca and Mg)
129
mg/L
0.05
1
EPA 200.7
(CaCO3)
Zinc (Zn)
0.073
mg/L
0.005
1
EPA 200.7
TOTAL RECOVERABLE METALS BY ICP-MS - 022100040
Antimony (Sb)
< 1
ug/L
1
1
EPA 200.8
Arsenic (As)
5.59
ug/L
1
1
EPA 200.8
Beryllium (Be)
< 1
ug/L
1
1
EPA 200.8
Cadmium (Cd)
< 1
ug/L
1
1
EPA 200.8
Chromium (Cr)
9.37
ug/L
1
1
EPA 200.8
Copper (Cu)
17.9
ug/L
2
1
EPA 200.8
Lead (Pb)
4.45
ug/L
1
1
EPA 200.8
Nickel (Ni)
8.43
ug/L
1
1
EPA 200.8
Selenium (Se)
1.02
ug/L
1
1
EPA 200.8
Silver (Ag) Low Level
< 0.3
ug/L
0.3
1
EPA 200.8
Thallium (TI) Low Level
< 0.2
ug/L
0.2
1
EPA 200.8
Total Suspended Solids - Low RL 2.5 - 022100024
TSS
270
mg/L
50
1
SM2540D
7 of 55
Analysis Date/Time Analyst
V_PACE
V_SHEALY
10/06/202212:58
CELL106
10/06/202212:58
CELL106
10/06/202212:58
CELL106
10/06/202212:58
CELL106
10/06/202212:58 CELL106
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/06/202213:43
MHALL3
10/04/2022 07:47 EBATIAN

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: Hg Dup
Collection Date: 09/30/2022 10:25 AM
Analyse Result Units Qualifiers RDL DF
MERCURY IN WATER - (Analysis Performed by Pace Labs)
Vendor Parameter Complete
8 of 55
Sample #: 2022025939
Matrix: NPDES
Method Analysis Date/Time Analyst
Vendor Method V_SHEALY

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: HG Field Blank
Collection Date: 09/30/2022 10:45 AM
Analyse Result Units Qualifiers RDL DF
MERCURY IN WATER - (Analysis Performed by Pace Labs)
Vendor Parameter Complete
9 of 55
Sample #: 2022025940
Matrix: NPDES
Method Analysis Date/Time Analyst
Vendor Method V_SHEALY

Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
Site: Hg Trip Blank
Collection Date: 09/30/2022 10:50 AM
Analyse Result Units Qualifiers RDL DF
MERCURY IN WATER - (Analysis Performed by Pace Labs)
Vendor Parameter Complete
10 of 55
Sample #: 2022025941
Matrix: NPDES
Method Analysis Date/Time Analyst
Vendor Method V_SHEALY

Certificate of Laboratory Analysis 11 of 55
This report shall not be reproduced, except in full.
Order # J22100047
Level II QC Summary
Q22100037 ICP_TRM TOTAL RECOVERABLE METALS BY ICP
Blank # 1
Parameter
Measured
Final
Units:
Dil RDL
Relative Concentration Qualifier
Boron (B)
0.00111
0.00111
mg/L
1 0.05
< 1/2 RDL
Calcium (Ca)
0.000259
0.000259
mg/L
1 0.05
< 1/2 RDL
Magnesium (Mg)
-0.00109
-0.00109
mg/L
1 0.02
< 1/2 RDL
Zinc (Zn)
0.000107
0.000107
mg/L
1 0.005
< 1/2 RDL
LCS # 1
Parameter
Measured
Final
Units:
Dil Spike
% Recovery
LCL
UCL Qualifier
Boron (B)
4.89
4.89
mg/L
1 5
97.8
85
115
Calcium (Ca)
4.88
4.88
mg/L
1 5
97.6
85
115
Magnesium (Mg)
4.83
4.83
mg/L
1 5
96.5
85
115
Zinc (Zn)
4.91
4.91
mg/L
1 5
98.2
85
115
LCS # 2
Parameter
Measured
Final
Units:
Dil Spike
% Recovery
LCL
UCL Qualifier
Boron (B)
4.84
4.84
mg/L
1 5
96.8
85
115
Calcium (Ca)
4.84
4.84
mg/L
1 5
96.8
85
115
Magnesium (Mg)
4.77
4.77
mg/L
1 5
95.4
85
115
Zinc (Zn)
4.87
4.87
mg/L
1 5
97.4
85
115
LCS # 3
Parameter
Measured
Final
Units:
Dil Spike
% Recovery
LCL
UCL Qualifier
Boron (B)
4.78
4.78
mg/L
1 5
95.6
85
115
Calcium (Ca)
4.8
4.8
mg/L
1 5
96
85
115
Magnesium (Mg)
4.7
4.7
mg/L
1 5
94
85
115
Zinc (Zn)
4.82
4.82
mg/L
1 5
96.4
85
115
LCS # 4
Parameter
Measured
Final
Units:
Dil Spike
% Recovery
LCL
UCL Qualifier
Boron (B)
4.95
4.95
mg/L
1 5
98.9
85
115
Calcium (Ca)
4.97
4.97
mg/L
1 5
99.4
85
115
Magnesium (Mg)
4.92
4.92
mg/L
1 5
98.4
85
115
Zinc (Zn)
5
5
mg/L
1 5
99.9
85
115
LCS # 5
Parameter
Measured
Final
Units:
Dil
Spike
% Recovery
LCL
UCL Qualifier
Boron (B)
4.84
4.84
mg/L
1
5
96.8
85
115
Calcium (Ca)
4.88
4.88
mg/L
1
5
97.5
85
115
Magnesium (Mg)
4.83
4.83
mg/L
1
5
96.5
85
115
Zinc (Zn)
4.92
4.92
mg/L
1
5
98.3
85
115

Certificate of Laboratory Analysis 12 of 55
This report shall not be reproduced, except in full.
Order # J22100047
Level II QC Summary
Q22100037 ICP_TRM TOTAL RECOVERABLE METALS BY ICP
MS # 1
Parameter
Measured
Final
Units:
Dil
Boron (B)
5.31
5.31
mg/L
1
Calcium (Ca)
42.7
42.7
mg/L
1
Magnesium (Mg)
19.5
19.5
mg/L
1
Zinc (Zn)
4.88
4.88
mg/L
1
MSD # 1
Parameter
Measured
Final
Units:
Dil
Boron (B)
5.17
5.17
mg/L
1
Calcium (Ca)
41
41
mg/L
1
Magnesium (Mg)
18.7
18.7
mg/L
1
Zinc (Zn)
4.72
4.72
mg/L
1
Parent Sample:
J22090121 --
2022023504
Spike
% Recovery LCL
UCL
Qualifier
5
99.1 70
130
5
107 70
130
5
101 70
130
5
97.2 70
130
Parent Sample:
J22090121 --
2022023504
Spike
% Recovery LCL
UCL
RPD Qualifier
5
96.2 70
130
2.82
5
72.1 70
130
4.2
5
84.9 70
130
4.11
5
94 70
130
3.33

Certificate of Laboratory Analysis 13 of 55
This report shall not be reproduced, except in full.
Order # J22100047
Level II QC Summary
Q22100040 IMS_TRM TOTAL RECOVERABLE METALS BY ICP-MS
Blank # 1
Parameter
Measured
Final
Units:
Dil RDL
Relative Concentration Qualifier
Antimony (Sb)
0.074
0.074
ug/L
1 1
< 1/2 RDL
Arsenic (As)
0.017
0.017
ug/L
1 1
< 1/2 RDL
Beryllium (Be)
0.016
0.016
ug/L
1 1
< 1/2 RDL
Cadmium (Cd)
-0.003
-0.003
ug/L
1 1
< 1/2 RDL
Chromium (Cr)
0.041
0.041
ug/L
1 1
< 1/2 RDL
Copper (Cu)
0.01
0.01
ug/L
1 2
< 1/2 RDL
Lead (Pb)
0.008
0.008
ug/L
1 1
< 1/2 RDL
Nickel (Ni)
0.03
0.03
ug/L
1 1
< 1/2 RDL
Selenium (Se)
-0.048
-0.048
ug/L
1 1
< 1/2 RDL
Silver (Ag) Low Level
0.004
0.004
ug/L
1 0.3
< 1/2 RDL
Thallium (TI) Low Level
0.013
0.013
ug/L
1 0.2
< 1/2 RDL
LCS # 1
Parameter
Measured
Final
Units:
Dil Spike
% Recovery
LCL
UCL Qualifier
Antimony (Sb)
50.9
50.9
ug/L
1 50
102
85
115
Arsenic (As)
50.5
50.5
ug/L
1 50
101
85
115
Beryllium (Be)
50.1
50.1
ug/L
1 50
100
85
115
Cadmium (Cd)
51.7
51.7
ug/L
1 50
103
85
115
Chromium (Cr)
51.2
51.2
ug/L
1 50
102
85
115
Copper (Cu)
51.5
51.5
ug/L
1 50
103
85
115
Lead (Pb)
50.7
50.7
ug/L
1 50
101
85
115
Nickel (Ni)
51.3
51.3
ug/L
1 50
103
85
115
Selenium (Se)
50.2
50.2
ug/L
1 50
100
85
115
Silver (Ag) Low Level
52.2
52.2
ug/L
1 50
104
85
115
Thallium (TI) Low Level
49.3
49.3
ug/L
1 50
98.6
85
115
LCS # 2
Parameter
Measured
Final
Units:
Dil Spike
% Recovery
LCL
UCL Qualifier
Antimony (Sb)
52.1
52.1
ug/L
1 50
104
85
115
Arsenic (As)
51.8
51.8
ug/L
1 50
104
85
115
Beryllium (Be)
50.4
50.4
ug/L
1 50
101
85
115
Cadmium (Cd)
50.7
50.7
ug/L
1 50
101
85
115
Chromium (Cr)
50.2
50.2
ug/L
1 50
100
85
115
Copper (Cu)
51.9
51.9
ug/L
1 50
104
85
115
Lead (Pb)
51.4
51.4
ug/L
1 50
103
85
115
Nickel (Ni)
51.8
51.8
ug/L
1 50
104
85
115
Selenium (Se)
50
50
ug/L
1 50
100
85
115
Silver (Ag) Low Level
51.8
51.8
ug/L
1 50
104
85
115
Thallium (TI) Low Level
49.1
49.1
ug/L
1 50
98.2
85
115

Certificate of Laboratory Analysis 14 of 55
This report shall not be reproduced, except in full.
Order # J22100047
Level II QC Summary
Q22100040 IMS_TRM TOTAL RECOVERABLE METALS BY ICP-MS
LCS # 3
Parameter
Measured
Final
Units:
Dil
Spike
% Recovery
LCL
UCL Qualifier
Antimony (Sb)
51.1
51.1
ug/L
1
50
102
85
115
Arsenic (As)
50.8
50.8
ug/L
1
50
102
85
115
Beryllium (Be)
51.2
51.2
ug/L
1
50
102
85
115
Cadmium (Cd)
51
51
ug/L
1
50
102
85
115
Chromium (Cr)
50.7
50.7
ug/L
1
50
101
85
115
Copper(Cu)
51
51
ug/L
1
50
102
85
115
Lead (Pb)
50.9
50.9
ug/L
1
50
102
85
115
Nickel (Ni)
51.3
51.3
ug/L
1
50
103
85
115
Selenium (Se)
51.8
51.8
ug/L
1
50
104
85
115
Silver (Ag) Low Level
51.2
51.2
ug/L
1
50
102
85
115
Thallium (TI) Low Level
49.3
49.3
ug/L
1
50
98.6
85
115
LCS # 4
Parameter
Measured
Final
Units:
Dil
Spike
% Recovery
LCL
UCL Qualifier
Antimony (Sb)
51.7
51.7
ug/L
1
50
103
85
115
Arsenic (As)
50.3
50.3
ug/L
1
50
101
85
115
Beryllium (Be)
50.3
50.3
ug/L
1
50
101
85
115
Cadmium (Cd)
49.8
49.8
ug/L
1
50
99.6
85
115
Chromium (Cr)
51
51
ug/L
1
50
102
85
115
Copper(Cu)
51
51
ug/L
1
50
102
85
115
Lead (Pb)
51
51
ug/L
1
50
102
85
115
Nickel (Ni)
50.8
50.8
ug/L
1
50
102
85
115
Selenium (Se)
50.1
50.1
ug/L
1
50
100
85
115
Silver (Ag) Low Level
51.7
51.7
ug/L
1
50
103
85
115
Thallium (TI) Low Level
49.3
49.3
ug/L
1
50
98.5
85
115
LCS # 5
Parameter
Measured
Final
Units:
Dil
Spike
% Recovery
LCL
UCL Qualifier
Antimony (Sb)
51.7
51.7
ug/L
1
50
103
85
115
Arsenic (As)
51.1
51.1
ug/L
1
50
102
85
115
Beryllium (Be)
48.7
48.7
ug/L
1
50
97.4
85
115
Cadmium (Cd)
51.7
51.7
ug/L
1
50
103
85
115
Chromium (Cr)
51.9
51.9
ug/L
1
50
104
85
115
Copper (Cu)
52.6
52.6
ug/L
1
50
105
85
115
Lead (Pb)
51.9
51.9
ug/L
1
50
104
85
115
Nickel (Ni)
52.3
52.3
ug/L
1
50
105
85
115
Selenium (Se)
50.3
50.3
ug/L
1
50
101
85
115
Silver (Ag) Low Level
52.9
52.9
ug/L
1
50
106
85
115
Thallium (TI) Low Level
50.7
50.7
ug/L
1
50
101
85
115

Level II QC Summary
Q22100040 IMS_TRM
MS # 1
Certificate of Laboratory Analysis
This report shall not be reproduced, except in full.
Order # J22100047
TOTAL RECOVERABLE METALS BY ICP-MS
Parameter
Measured
Final
Units:
Dil
Spike
Antimony (Sb)
53.7
53.7
ug/L
1
50
Arsenic (As)
58.7
58.7
ug/L
1
50
Beryllium (Be)
50.9
50.9
ug/L
1
50
Cadmium (Cd)
49.8
49.8
ug/L
1
50
Chromium (Cr)
49.8
49.8
ug/L
1
50
Copper (Cu)
51.7
51.7
ug/L
1
50
Lead (Pb)
50.4
50.4
ug/L
1
50
Nickel (Ni)
56.3
56.3
ug/L
1
50
Selenium (Se)
74
74
ug/L
1
50
Silver (Ag) Low Level
50.2
50.2
ug/L
1
50
Thallium (TI) Low Level
49.5
49.5
ug/L
1
50
MSD # 1
Parameter
Measured
Final
Units:
Dil
Spike
Antimony (Sb)
53.3
53.3
ug/L
1
50
Arsenic (As)
59.6
59.6
ug/L
1
50
Beryllium (Be)
50.1
50.1
ug/L
1
50
Cadmium (Cd)
49.9
49.9
ug/L
1
50
Chromium (Cr)
50.2
50.2
ug/L
1
50
Copper (Cu)
51.6
51.6
ug/L
1
50
Lead (Pb)
50
50
ug/L
1
50
Nickel (Ni)
56.1
56.1
ug/L
1
50
Selenium (Se)
74.7
74.7
ug/L
1
50
Silver (Ag) Low Level
50.4
50.4
ug/L
1
50
Thallium (TI) Low Level
49.7
49.7
ug/L
1
50
Parent Sample: J22090128 -- 2022023542
15 of 55
% Recovery
LCL
UCL Qualifier
102
70
130
102
70
130
101
70
130
99.4
70
130
98.9
70
130
99.9
70
130
100
70
130
101
70
130
97.7
70
130
100
70
130
97.8
70
130
Parent Sample: J22090128 -- 2022023542
% Recovery
LCL
UCL
RPD Qualifier
101
70
130
0.718
103
70
130
1.65
99.9
70
130
1.58
99.5
70
130
0.0422
99.6
70
130
0.679
99.6
70
130
0.293
99.7
70
130
0.764
101
70
130
0.26
99.1
70
130
1.48
101
70
130
0.477
98.2
70
130
0.414

Certificate of Laboratory Analysis 16 of 55
This report shall not be reproduced, except in full.
Order # J22100047
Level II QC Summary
Q22100024 TSS_LL Total Suspended Solids - Low RL 2.5
Blank # 1
Parameter Measured
Final
Units:
Dil
RDL
Relative Concentration
Qualifier
TSS
0
mg/L
1
2.5
< 1/2 RDL
Duplicate # 1
Parent Sample:
J22090541 --
2022025681
Parameter Measured
Final
Units:
Dil
Limit Range
RPD Qualifier
TSS
11.3
mg/L
1
6.39
LCS # 1
Parameter Measured
Final
Units:
Dil
Spike
% Recovery LCL
UCL
Qualifier
TSS
90
mg/L
1
100
90 90
110

leAnalyiical
www.pacelabs.com
Pace Analytical Services, LLC
9800 Klice. Suite 100
Huntersville, NC 28078
[phone]
October 11, 2022
Program Manager
Duke Energy
13339 Hagers Ferry Road
Bldg.7405 MG30A2
Huntersville, NC 28078
RE: Project: J22100047 ALN SW
Pace Project No.: 92629130
Dear Program Manager:
Enclosed are the analytical results for sample(s) received by the laboratory on October 04, 2022. The results relate only to
the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the
laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report.
The test results provided in this final report were generated by each of the following laboratories within the Pace Network:
• Pace Analytical Services - Charlotte
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
%D'a6-
Nicole D'Oleo
nicole.d'[e-mail]
[phone]
Project Manager
Enclosures
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 1 of 16

leAnalyiical
www.pacelabs.com
Pace Analytical Services, LLC
9800 Kligc6r&ie. Suite 100
Huntersville, NC 28078
[phone]
Project: J22100047 ALN SW
Pace Project No.: 92629130
Pace Analytical Services Charlotte
South Carolina Laboratory ID: 99006
9800 Kincey Ave. Ste 100, Huntersville, NC 28078
North Carolina Drinking Water Certification #: 37706
North Carolina Field Services Certification #: 5342
North Carolina Wastewater Certification #: 12
South Carolina Laboratory ID: 99006
CERTIFICATIONS
South Carolina Certification #: 99006001
South Carolina Drinking Water Cert. #: 99006003
Florida/NELAP Certification #: E87627
Kentucky UST Certification #: 84
Louisiana DoH Drinking Water #: LA029
VirginiaNELAP Certification #: 460221
REPORT OF LABORATORY ANALYSIS
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without the written consent of Pace Analytical Services, LLC. Page 2 of 16

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[phone]
SAMPLE SUMMARY
Project: J22100047 ALN SW
Pace Project No.: 92629130
Lab ID
Sample ID
Matrix
Date Collected
Date Received
92629130001
2022025935
Water
09/30/2211:10
10/04/22 14:05
92629130002
2022025936
Water
09/30/22 10:00
10/04/22 14:05
92629130003
2022025937
Water
09/30/22 10:25
10/04/22 14:05
92629130004
2022025938
Water
09/30/2211:45
10/04/22 14:05
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Page 3 of 16

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[phone]
SAMPLE ANALYTE COUNT
Project: J22100047 ALN SW
Pace Project No.: 92629130
Analytes
Lab ID Sample ID
Method
Analysts
Reported
Laboratory
92629130001 2022025935
EPA1664B
REL
1
PASI-C
92629130002 2022025936
EPA1664B
REL
1
PASI-C
92629130003 2022025937
EPA1664B
REL
1
PASI-C
92629130004 2022025938
EPA1664B
REL
1
PASI-C
PASI-C = Pace Analytical Services - Charlotte
REPORT OF LABORATORY ANALYSIS
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without the written consent of Pace Analytical Services, LLC. Page 4 of 16

leAnalyiical
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Pace Analytical Services, LLC
9800 If�nicgr&ie. Suite 100
Huntersville, NC 28078
[phone]
PROJECT NARRATIVE
Project: J22100047 ALN SW
Pace Project No.: 92629130
Method: EPA 1664B
Description: 1664 SGT-HEM, TPH
Client: Duke Energy
Date: October 11, 2022
General Information:
4 samples were analyzed for EPA 1664B by Pace Analytical Services Charlotte. All samples were received in acceptable condition with
any exceptions noted below or on the chain -of custody and/or the sample condition upon receipt form (SCUR) attached at the end of
this report.
Hold Time:
The samples were analyzed within the method required hold times with any exceptions noted below.
Initial Calibrations (including MS Tune as applicable):
All criteria were within method requirements with any exceptions noted below.
Continuing Calibration:
All criteria were within method requirements with any exceptions noted below.
Surrogates:
All surrogates were within QC limits with any exceptions noted below.
Method Blank:
All analytes were below the report limit in the method blank, where applicable, with any exceptions noted below.
Laboratory Control Spike:
All laboratory control spike compounds were within QC limits with any exceptions noted below.
Matrix Spikes:
All percent recoveries and relative percent differences (RPDs) were within acceptance criteria with any exceptions noted below.
Duplicate Sample:
All duplicate sample results were within method acceptance criteria with any exceptions noted below.
Additional Comments:
This data package has been reviewed for quality and completeness and is approved for release.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC. Page 5 of 16

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Huntersville, NC 28078
[phone]
ANALYTICAL RESULTS
Project: J22100047 ALN SW
Pace Project No.: 92629130
Sample: 2022025935 Lab ID: 92629130001 Collected: 09/30/22 11:10 Received: 10/04/22 14:05 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
1664 SGT-HEM, TPH Analytical Method: EPA 1664E
Pace Analytical Services - Charlotte
Total Petroleum Hydrocarbons ND mg/L 4.9 1 10/11/22 03:15
REPORT OF LABORATORY ANALYSIS
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Date: 10/11 /2022 01:48 PM without the written consent of Pace Analytical Services, LLC. Page 6 of 16

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Huntersville, NC 28078
[phone]
ANALYTICAL RESULTS
Project: J22100047 ALN SW
Pace Project No.: 92629130
Sample: 2022025936 Lab ID: 92629130002 Collected: 09/30/22 10:00 Received: 10/04/22 14:05 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
1664 SGT-HEM, TPH Analytical Method: EPA 1664E
Pace Analytical Services - Charlotte
Total Petroleum Hydrocarbons ND mg/L 4.8 1 10/11/22 03:15
REPORT OF LABORATORY ANALYSIS
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Date: 10/11 /2022 01:48 PM without the written consent of Pace Analytical Services, LLC. Page 7 of 16

leAnalyiical
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Pace Analytical Services, LLC
9800 %cfr&ie. Suite 100
Huntersville, NC 28078
[phone]
ANALYTICAL RESULTS
Project: J22100047 ALN SW
Pace Project No.: 92629130
Sample: 2022025937 Lab ID: 92629130003 Collected: 09/30/22 10:25 Received: 10/04/22 14:05 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
1664 SGT-HEM, TPH Analytical Method: EPA 1664E
Pace Analytical Services - Charlotte
Total Petroleum Hydrocarbons ND mg/L 4.9 1 10/11/22 03:15
REPORT OF LABORATORY ANALYSIS
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Date: 10/11 /2022 01:48 PM without the written consent of Pace Analytical Services, LLC. Page 8 of 16

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Pace Analytical Services, LLC
9800 %cfr&ie. Suite 100
Huntersville, NC 28078
[phone]
ANALYTICAL RESULTS
Project: J22100047 ALN SW
Pace Project No.: 92629130
Sample: 2022025938 Lab ID: 92629130004 Collected: 09/30/22 11:45 Received: 10/04/22 14:05 Matrix: Water
Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual
1664 SGT-HEM, TPH Analytical Method: EPA 1664E
Pace Analytical Services - Charlotte
Total Petroleum Hydrocarbons ND mg/L 4.9 1 10/11/22 03:15
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/11 /2022 01:48 PM without the written consent of Pace Analytical Services, LLC. Page 9 of 16

leAnalyiical
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Pace Analytical Services, LLC
9800 %cfr&ie. Suite 100
Huntersville, NC 28078
[phone]
QUALITY CONTROL DATA
Project: J22100047 ALN SW
Pace Project No.: 92629130
QC Batch: 728933 Analysis Method: EPA 1664B
QC Batch Method: EPA 1664E Analysis Description: 1664 SGT-HEM, TPH
Laboratory: Pace Analytical Services - Charlotte
Associated Lab Samples: 92629130001, 92629130002, 92629130003, 92629130004
METHOD BLANK: 3796196 Matrix: Water
Associated Lab Samples: 92629130001, 92629130002, 92629130003, 92629130004
Blank Reporting
Parameter Units Result Limit Analyzed Qualifiers
Total Petroleum Hydrocarbons mg/L ND 5.0 10/11/22 03:15
LABORATORY CONTROL SAMPLE: 3796197
Spike LCS
LCS
% Rec
Parameter
Units
Conc. Result
% Rec
Limits
Qualifiers
Total Petroleum Hydrocarbons
mg/L
20 13.5
68
64-132
MATRIX SPIKE SAMPLE:
3796198
92629851001 Spike
MS
MS
% Rec
Parameter
Units
Result Conc.
Result
% Rec
Limits Qualifiers
Total Petroleum Hydrocarbons
mg/L
ND 19.2
18.8
88
64-132
SAMPLE DUPLICATE: 3796199
92629949001 Dup Max
Parameter Units Result Result RPD RPD Qualifiers
Total Petroleum Hydrocarbons mg/L ND ND 30
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/11/2022 01:48 PM without the written consent of Pace Analytical Services, LLC. Page 10 of 16

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Pace Analytical Services, LLC
9800 "cfr&ie. Suite 100
Huntersville, NC 28078
[phone]
QUALIFIERS
Project: J22100047 ALN SW
Pace Project No.: 92629130
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL -Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean -Up
U - Indicates the compound was analyzed for, but not detected.
Acid preservation may not be appropriate for 2 Chloroethylvinyl ether.
A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA
Method 8260.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as
"Total" may vary slightly from the sum of the reported component parameters.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TN -The NELAC Institute.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
Date: 10/11/2022 01:48 PM without the written consent of Pace Analytical Services, LLC. Page 11 of 16

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[phone]
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Project: J22100047 ALN SW
Pace Project No.: 92629130
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
92629130001
2022025935
EPA1664B
728933
92629130002
2022025936
EPA1664B
728933
92629130003
2022025937
EPA1664B
728933
92629130004
2022025938
EPA1664B
728933
Date: 10/11/2022 01:48 PM
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Analytical
Batch
Page 12 of 16

�l�ace uc.f►-_I Isle: mvv-t-tiivi-rtUN-i-UVu,5 vu'1 Sample Uonclition upon Receipt
Effective Date: 05/12/202205/12/2022
Laboratory receiving samples:
Asheville ❑ Eden[] Greenwood ❑ Huntersville 5� Raleigh❑ Mechanicsville❑ Atlanta❑ Kernersvillef-1
ReceiptSample Upon Client Name: WD : 92629130
Project A.
Courier ❑,Fed Ex ❑UPS ❑U5P5 ❑Client
❑ IIIII1111111111111111 Commercial Pace ❑Other;
Custody Seal Present? MYesa Seals Intact? 5Yes ❑No
Date/initials Person Examining Contents: C1 ——72
Packing Material: [—]Bubble Wrap Bubble Bags ❑None ❑ Other Biological Tissue Frozen?
Thermometer: []Yes ❑No CaN/A
�IRGun ID: Type of Ice: nwet ❑blue ❑Name
Correction Factor:
Cooler Temp: ` ' L Add/Subtract (,C) u U Temp should be above freezing to 6°C
has begun
Cooler Temp Corrected (°[): ❑e Gut of temp criteria, Samples on ice, cooling process
USDA Regulated Soil ( [Z�N/A, water sample)
Did samples originate in a quarantine zone within the United States: CA. NY. or SC Did samnles nr1Pinara from a Mr.i.. ­r;..+e
com
maps)? LIYes L1No
Chain of Custody Present?
RlYes
❑No
[I N/A
1.
Samples Arrived within Hold Time?
OYES
❑No
❑N/A
2.
Short Hold Time Analysis (e72 hr.)?
❑Yes
[9No
❑N/A
3.
Rush Turn Around Time Requested?
❑Yes
EINO
❑N/A
4.
Sufficient Volume?
Myes
❑No
❑N/A
5.
Correct Containers Used?
(Yes
❑No
❑N/A
6:
-Pace Containers Used?
Elva.
I klI
MKI/A
Containers Intact?
Dissolved analysis: Samples Field Filtered?
sample Labels Match CDC?
Yes ❑NO ❑N/A 7.
❑Yes [:]No -N/A a.
9Yes ❑No ❑N/A 9.
Hawaii and Puerto Rico)? ❑Yes ❑No
Comm ents/DIscreoancv:
-Includes Date/Time/ID/Analysis Matrix:
Headspace in VOA Vials (>5-6mm)? ❑Yes &INo E�N/A 10.
Trip Blank Present? ❑Yes f;2W [I N/A 11.
Trip Blank Custody Seals Present? Des ❑NO /A
MENTS/SAMPLE DISCREPANCY field Data Required? ❑Yes DNo
Lot ID of split containers:
CLIENT NOTIFICATION/RESOLUTION
Person contacted:
Project Manager SCURF Review:
Drniert NlanaPar SRF Ra�lic++ti+•
Date/Time:
Date:
Page 13 of 16
Qualtrax ID: 69614 Page 1 of 2

Id, CI4v-r'K1Yf-r1UN1-UUbJ vU1 Sample Condition Upon Receipt
ace
30 of 55
Effective Date: 05/121202205/12/2022
*Check mark top half of box if pH and/or dechlorination is verified and
within the acceptance range for preservation samples.
Exceptions; VOA, Coliform, TOC, Oil and Grease, DRO/8015 (water) DOC, LLHg
**Bottom half of box is to list number of bottles
***Check all unpreserved Nitrates for chlorine
Protect #
WO# : 92 fiZ9130
PM: NMG Due Dater 10/11/22
CLIENT: 92-Duke En@r•
a u 0 v ¢ a q
_ _ _ _ _
N ey ` z b M m _ m
N Gl al �p V V A _ Gi N V _ Ol Q >
ai
V Q z Y Q Q 7 z a
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m v m m v m N m = w g o N i
`p_ a s?. a O p m a y a d o v Q ^� y z Z
4
a c = Z z c c N z ? C14O v a a H to iCL
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u S NJZ v S = ? S z in 4 a O '° '° z S o c
U u x = m en
a a ° °�� J E a ¢ a E a 4 O O O 4 o c v E £
n o a Q: E E E £ v tli m E v E E -a - 4 - - u J
� ry Q ut `r' `n W = tNoy o o E E E £ a E E E o I E
7 N N N ,Ny N 0 as V i
w a a a a a m a V i7 l7 lm:l l7 M l9 ( m rn rn m Ln � M o = aai
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1
2
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7
8
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11
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PH Adjustment Log for Preserved Samples
Sample ID Type of Preservative pH upon receipt Date preservation adjusted Time preservation Amount of Preservative LoE#
ad]usted added
ilwiv; Wiienever [here is a discrepancy aftecting North Carolina compliance samples, a copy of this form will be sent to the North Carolina OENR Certification Office (Le,
Out of hold, incorrect preservative, out of temp, incorrect containers.
Page 14 of 16
Qualtrax ID: 69614 Page 2 of 2
M1

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Page 16 of 16

33 of 55
0
aceAnalytical
Report of Analysis
Duke Energy
13339 Hagers Ferry Rd
Bldg 7405
Huntersville, NC 28078
Attention: Jason Robinson
Project Name: Allen Stormwater
Project Number: J22100047
Lot Number:XJ06030
Date Completed:10/11/2022
10/13/2022 12:21 PM
Approved and released by:
Project Coordinator 1: Jenna S. Holliday
pCC/►F0
ANSI National Accreditation Board
qe�
A C C R E D I T E D
TESTING LABORATORY
The electronic signature above is the equivalent of a handwritten signature.
This report shall not be reproduced, except in its entirety, without the written approval of Pace Analytical Services, LLC.
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172
Tel:[phone] Fax:[phone] www.pacelabs.com
Page 1 of 21

34 of 55
PACE ANALYTICAL SERVICES, LLC
SC DHEC No: 32010001 NELAC No: E87653 NC DENR No: 329 NC Field Parameters No: 5639
Case Narrative
Duke Energy
Lot Number: XJ06030
This Report of Analysis contains the analytical result(s) for the sample(s) listed on the Sample Summary
following this Case Narrative. The sample receiving date is documented in the header information
associated with each sample.
All results listed in this report relate only to the samples that are contained within this report. Where
sampling is conducted by the client, results relate to the accuracy of the information provided, and as the
samples are received.
Sample receipt, sample analysis, and data review have been performed in accordance with the most
current approved The NELAC Institute (TNI) standards, the Pace Analytical Services, LLC ("Pace")
Laboratory Quality Manual, standard operating procedures (SOPS), and Pace policies. Any exceptions to
the TNI standards, the Laboratory Quality Manual, SOPS or policies are qualified on the results page or
discussed below.
Pace is a TNI accredited laboratory; however, the following analyses are currently not listed on our TNI
scope of accreditation: Drinking Water: VOC (excluding BTEX, MTBE, Naphthalene, & 1,2-
dichloroethane) EPA 524.2, E. coli and Total coliforms SM 9223 B-2004, Solid Chemical Material: TOC
Walkley-Black, Biological Tissue: All, Non -Potable Water: SGT-HEM EPA 1664B, Silica EPA 200.7,
Boron, Calcium, Silicon, Strontium EPA 200.8, Bicarbonate, Carbonate, and Hydroxide Alkalinity SM 2320
B-2011, SM 9221 C E-2006 & SM 9222D-2006, Strontium SW-846 6010D, VOC SM 6200 B-2011, Fecal
Coliform Colilert-18.
If you have any questions regarding this report, please contact the Pace Project Manager listed on the
cover page.
Pace Analytical Services, LLC (formerly Shealy Environmetal Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 2 of 21

PACE ANALYTICAL SERVICES, LLC
Sample Summary
Duke Energy
Lot Number: XJ06030
Project Name: Allen Stormwater
Project Number: J22100047
Sample Number
Sample ID
Matrix
Date Sampled
Date Received
001
2022025935
Aqueous
09/30/20221110
10/05/2022
002
2022025936
Aqueous
09/30/20221000
10/05/2022
003
2022025937
Aqueous
09/30/20221025
10/05/2022
004
2022025938
Aqueous
09/30/20221145
10/05/2022
005
2022025939
Aqueous
09/30/20221025
10/05/2022
006
2022025940
Aqueous
09/30/20221045
10/05/2022
007
2022025941
Aqueous
09/30/20221050
10/05/2022
(7 samples)
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 3 of 21

PACE ANALYTICAL SERVICES,
LLC
Detection Summary
Duke Energy
Lot Number: XJ06030
Project Name: Allen Stormwater
Project Number: J22100047
Sample
Sample ID
Matrix Parameter Method
Result Q
Units
Page
001
2022025935
Aqueous Mercury (CVAFS) 1631E
3.80
ng/L
5
002
2022025936
Aqueous Mercury (CVAFS) 1631E
5.58
ng/L
6
003
2022025937
Aqueous Mercury (CVAFS) 1631E
1.53
ng/L
7
004
2022025938
Aqueous Mercury (CVAFS) 1631E
15.6
ng/L
8
005
2022025939
Aqueous Mercury (CVAFS) 1631E
1.46
ng/L
9
(5 detections)
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 4 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-001
Description: 2022025935 Matrix: Aqueous
Date Sampled:09/30/2022 1110 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0614 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury (CVAFS) 7439-97-6 1631 E 3.80 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 5 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-002
Description: 2022025936 Matrix: Aqueous
Date Sampled:09/30/2022 1000 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0619 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury (CVAFS) 7439-97-6 1631 E 5.58 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 6 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-003
Description: 2022025937 Matrix: Aqueous
Date Sampled:09/30/2022 1025 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0625 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury (CVAFS) 7439-97-6 1631 E 1.53 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 7 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-004
Description: 2022025938 Matrix: Aqueous
Date Sampled:09/30/2022 1145 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0641 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury (CVAFS) 7439-97-6 1631 E 15.6 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 8 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-005
Description: 2022025939 Matrix: Aqueous
Date Sampled:09/30/2022 1025 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0647 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury (CVAFS) 7439-97-6 1631 E 1.46 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 9 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-006
Description: 2022025940 Matrix: Aqueous
Date Sampled:09/30/2022 1045 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0652 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury(CVAFS) 7439-97-6 1631E ND 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 10 of 21

Mercury (CVAFS)
Client: Duke Energy Laboratory ID:XJ06030-007
Description: 2022025941 Matrix: Aqueous
Date Sampled:09/30/2022 1050 Project Name: Allen Stormwater
Date Received:10/05/2022 Project Number: J22100047
Run Prep Method Analytical Method Dilution Analysis Date Analyst Prep Date Batch
1 1631 E 1 10/11/2022 0658 JA132 10/08/2022 0644 56309
CAS Analytical
Parameter Number Method Result Q LOQ Units Run
Mercury(CVAFS) 7439-97-6 1631E ND 0.500 ng/L 1
LOQ = Limit of Quantitation B = Detected in the method blank E = Quantitation of compound exceeded the calibration range Q = Surrogate failure
NO = Not detected at or above the LOQ N = Recovery is out of criteria P = The RPD between two GC columns exceeds 40 % L = LCS/LCSD failure
H = Out of holding time W = Reported on wet weight basis S = MS/MSD failure
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 11 of 21

QC Summary
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.) QC Data for Lot Number: XJ06030
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 12 of 21

Mercury (CVAFS) - MB
Sample ID: XQ56309-001 Matrix: Aqueous
Batch: 56309 Prep Method:
Analytical Method: 1631 E Prep Date: 10/08/2022 0644
Parameter Result Q Dil LOQ Units Analysis Date
Mercury (CVAFS) ND 1 0.500 ng/L 10/11/2022 0346
LOQ = Limit of Quantitation
ND = Not detected at or above the LOQ
= RSD is out of criteria
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40
+ = RPD is out of criteria
Note: Calculations are performed before rounding to avoid round -off errors in calculated results
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 13 of 21
QC Data for Lot Number: XJ06030

Mercury (CVAFS) - MB
Sample ID: XQ56309-101 Matrix: Aqueous
Batch: 56309 Prep Method:
Analytical Method: 1631 E Prep Date: 10/08/2022 0644
Parameter Result Q Dil LOQ Units Analysis Date
Mercury (CVAFS) ND 1 0.500 ng/L 10/11/2022 0352
LOQ = Limit of Quantitation
ND = Not detected at or above the LOQ
= RSD is out of criteria
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40
+ = RPD is out of criteria
Note: Calculations are performed before rounding to avoid round -off errors in calculated results
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 14 of 21
QC Data for Lot Number: XJ06030

Mercury (CVAFS) - LCS
Sample ID: XQ56309-002 Matrix: Aqueous
Batch: 56309 Prep Method:
Analytical Method: 1631 E Prep Date: 10/08/2022 0644
Spike
Amount Result %Rec
Parameter (ng/L) (ng/L) Q Dil % Rec Limit Analysis Date
Mercury (CVAFS) 5.00 4.88 1 98 75-125 10/11/2022 0357
LOQ = Limit of Quantitation
ND = Not detected at or above the LOQ
= RSD is out of criteria
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40 %
+ = RPD is out of criteria
Note: Calculations are performed before rounding to avoid round -off errors in calculated results
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 15 of 21
QC Data for Lot Number: XJ06030

Mercury (CVAFS) - MS
Sample ID: XJ06030-003MS
Matrix: Aqueous
Batch: 56309
Prep Method:
Analytical Method: 1631 E
Prep Date: 10/08/2022 0644
Sample
Spike
Amount
Amount
Result %Rec
Parameter
(ng/L)
(ng/L)
(ng/L) Q Dil % Rec Limit Analysis Date
Mercury (CVAFS)
1.53
5.00
5.94 1 88 71-125 10/11/2022 0630
LOQ = Limit of Quantitation
ND = Not detected at or above the LOQ
= RSD is out of criteria
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40 %
+ = RPD is out of criteria
Note: Calculations are performed before rounding to avoid round -off errors in calculated results
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 16 of 21
QC Data for Lot Number: XJ06030

Mercury (CVAFS) - MSD
Sample ID: XJ06030-003MD
Matrix: Aqueous
Batch: 56309
Prep Method:
Analytical Method: 1631 E
Prep Date: 10/08/2022 0644
Sample
Spike
Amount
Amount Result
%Rec % RPD
Parameter
(ng/L)
(ng/L) (ng/L)
Q Dil % Rec % RPD Limit Limit Analysis Date
Mercury (CVAFS)
1.53
5.00 5.88
1 87 0.91 71-125 24 10/11/2022 0636
LOQ = Limit of Quantitation
ND = Not detected at or above the LOQ
= RSD is out of criteria
N = Recovery is out of criteria
P = The RPD between two GC columns exceeds 40 %
+ = RPD is out of criteria
Note: Calculations are performed before rounding to avoid round -off errors in calculated results
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 17 of 21
QC Data for Lot Number: XJ06030

Chain of Custody
and
Miscellaneous Documents
Pace Analytical Services, LLC (formerly Shealy Environmental Services, Inc.)
106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 18 of 21

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106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 19 of 21

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Page 20 of 21

PACE ANALYTICAL SERVICES, LLC
DC# Title: EW-FRlti+1-V4ML•0286 v02 Surop[wg R@42eipt Qwdclirt (SRCj
Lffimrtive Date: 81212C22
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106 Vantage Point Drive West Columbia, SC 29172 [phone] Fax [phone] www.pacelabs.com
Page 21 of 21

C
CHAIN OF CUSTODY RECORD AND ANALYSIS REQUEST FORM
— — ........................I r-------------------------------------------------------
a ical Laboratory Services i Analytical Laboratory Use Only
�' DUKE Mail Code MG03A2 (Building 7405) ! I� Work r Matrix: NPDES Samples
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Important: When specific accounting has been established enter that accounitng
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�•� DUKE Mail Code MG03A2 (Building 7405) I I Work Order Matrix: NPDES Samples
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Action Plan: Tier III Benchmark
Exceedances
Belmont, NC
0
0

October 31, 2022
Mr. Randy Gantt
Duke Energy — Allen Steam Station
253 Plant Allen Road
Belmont, NC 28012
Subject: Allen Steam Station • Tier I and Tier III Exceedances
Dear Randy:
L'7 Cardno
now
® Stantec
Cardno
534 Industrial Park Rd
Bluefield, VA 24605-9364
USA
Phone: [phone]
www.cardno.com
www.stantec.com
As requested, please review a discussion of the findings based on our October 27, 2022 site investigation
conducted with Mr. Kenneth McKenny.
SW010
Outfall SWO10 exceeded the benchmark standard for copper and selenium based on September 30, 2022
stormwater sample collection. SWO10 was previously in Tier III for copper. This event marks the first exceedance
of Selenium resulting in elevation to Tier I status.
During the investigation it was noted that the drop inlet filters, and shell media previously installed in the surface
ditch lines / downgradient drop inlets were in good order. It was also noted that TSS was not a factor in this latest
sampling event as in previous exceedances, indicating that BMPs in the downgradient area are working.
Tracing the piping network upgradient resulted in discovery of a drop -inlet in the alleyway between the railroad
tracks and powerhouse. A maintenance conveyor was setup to discharge into this alleyway proximal to the drop -
inlet. This conveyor appeared to be used for cleaning of coal and debris at the base of the powerhouse stacks.
This material has been and is being tracked throughout the alleyway (Photos 1-3).
It is believed this tracking may have impacted the drop -inlet resulting in elevated concentrations of copper and
selenium in stormwater discharge. A sediment sample from this drop -inlet was collected on October 27, 2022 for
analysis of copper and selenium. Results of analysis are in -process.
Only a few known stormwater drop inlets are present in the powerhouse alleyway. Most precipitation in the area is
directed to the coal yard sumps via an extensive network of drop -inlets. It is recommended that a smoke test be
conducted to locate all drop -inlets connected to SWO10 west of the railroad tracks. Factoring in the crown of the
road and presence of sufficient drop -inlets in the powerhouse area routing precipitation to the coal yard sump, it
may be feasible to eliminate stormwater drop inlets on the west side (upgradient) of the railroad tracks. This would
eliminate a potential source of stormwater contamination from impacting the stormwater basin.
Sediment buildup has been trapped by oyster shell media placed in a drop -inlet near the discharge of SWO10.
Sediment building is occurring on the west (upgradient) side of the shell media as illustrated in Photo 4. So far, the
shell media has managed to capture most of the sediment (Photo 5, downstream piping); however, the media is
likely being fouled and the piping should be flushed to reduce the chance of a future TSS exceedance.

LI7 Ca/'d/7o
Duke Energy —Allen Steam Station
October 31. 2022
2 SWO16
now
(3 Stantec
Outfall SWO16 exceeded the benchmark standard for copper and TSS following September 30, 2022 stormwater
sample collection. This exceedance is likely related to ongoing upgradient operations, specifically tracking of soil
across Plant Allen Road (Photos 6 and 7). Soil was identified in the concrete ditches (Photos 8 - 10) and fouling rip -
rap lined ditches (Photos 11-13). Additionally, sediment is being derived from distribution / transmission tower
upgrades (Photos 14 - 17). This condition has been ongoing and concurrent with sediment inputs from tracking
across Plant Allen Road.
It is recommended that housekeeping practices be immediately undertaken to limit sediment inputs. Gravel
crossing needs to be maintained and the roadway crossing should remain free of sediment. Washing of sediment
from the roadway to the ditches is strongly discouraged. Either a pickup broom should be used to collect sediment
or a crossing structure installed to catch sediment and divert it to the construction basin and away from SWO16.
Concrete ditches also need to be consistently maintained and sediment free. Denuded ground from transmission /
distribution tower upgrades also needs to be stabilized. Erosion and sediment control measure consisting of silt
fence and filter socks should also be properly applied until groundcover is established.
Riprap ditches are currently fouled with sediment. These areas could be relined with geotextile and fresh rock.
Alternatively, a small retention basin with a flocculant component could be installed to catch sediment as it flushes
through the basin before it reaches the stormwater sample point and canal.
The conveyance pipe discharging stormwater to the canal is also undermined and potentially deteriorated (Photo
18-19). A void is present at the inlet of the pipe extending below -grade greater than 1-foot and laterally an
undermined distance. This void is likely undermining the pipe. The bottom (belly) of the pipe may also be
degraded, allowing water being conveyed to mix with underlying soil media, increasing both turbidity and
undermining the piping further. It is recommended that the piping void be grouted to ensure flow is transmitted
through stormwater piping. A survey of the piping should also be conducted to confirm pipe integrity.
3 Recommendations
Cardno recommends that action be taken to address the aforementioned topics to mitigate impacts to stormwater
discharge. Increased scrutiny will likely be on the station with the renewal of the ISW Permit. Cardno will be glad to
assist with these efforts at your request.
Respectfully,
oshua Sexton
Senior Geologist
for Cardno
Direct Line [phone]
Email: Joshua. Sexton (a cardno.com

C,'7 Caircl"40
Cardno Field Notes:
Staff: J. Sexton Date / Time: October 27, 2022 10:55 AM Location: 35.18999884999489,-81.0081013521948
Observation: SW010 drop inlet sediment sample collected from alley near facility.
Photo 1
Photo 2
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Photo 3

G'7 CeAref"o
Cardno Field Notes:
Staff: J. Sexton Date / Time: October 27, 2022 9:45 AM Location: 35.18994080387281,-81.00768627712556
Observation: SW010 upgradient buildup of sediment to the west and downgradient to discharge at river.
Photo 4
i
Photo 5

G'7 cavc/na
Cardno Field Notes:
Staff: J. Sexton Date / Time: October 27, 2022 8:37 AM Location: 35.18728544082313,-81.01389783327292
Observation: Plant Allen road crossing. Sediment entering SW016 basin from hauling activities. Construction crossing not maintained with gravel.
Photo 6
Photo 7

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Cardno Field Notes:
Staff: J. Sexton Date / Time: October 27, 2022 8:40 AM Location: 35.18723359052008,-81.0147020615989
Observation: Upper SW016 basin trans/distribution lines construction.
Photo 14
Photo 15

G'7 Cardno
Cardno Field Notes:
Staff: J. Sexton Date / Time: October 27, 2022 9:11 AM Location: 35.188790026148496, -81.01219366040158
Observation: Construction of transmission / distribution lines lower in basin.
Photo 16
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Photo 17

<,,'7 Cevclno
Cardno Field Notes:
Staff: J. Sexton Date / Time: October 27, 2022 9:18 AM Location: 35.18931079808275,-81.01260812890709
Observation: Void before pipe greater than 1' deep, extends greater than 2' under pipe
Photo 18 Photo 19

Action Plan: Tier III Benchmark
Exceedances
Belmont, NC

<.:� Cardna®

Best Management Practices
Allen Steam Station
Table of Contents
1 Best Management Practices Summary...........................................................................1
1.1 Coal Pile Management........................................................................................................ 1
1.2 Fugitive Dust Emissions...................................................................................................... 1
1.3 Fuel Oil Unloading / Chemical Loading and Unloading / Miscellaneous Loading and
Unloading...................................................................................................................
1.4 Liquid Storage Tanks / Large Bulk Fuel Storage / Above Ground Tanks ..................
1.5 Oil Bearing Equipment Switchyards...........................................................................
1.6 Residue Hauling Vehicles / Ash Loading Areas.........................................................
1.7 Vehicle and Equipment Maintenance.........................................................................
1.8 Material Storage Areas...............................................................................................
1.9 Fueling Operations.....................................................................................................
Appendices
Appendix A — Industrial Stormwater Fact Sheet
Appendix B — Outfall Narrative Descriptions
1
2
2
2
2
3
3
October 2019 Cardno Table of Contents i
Allen Steam Station - BMP 20191028

Best Management Practices
Allen Steam Station
1 Best Management Practices Summary
A number of best management practices (BMPs) are currently in place at the station. These BMPs were
instituted over a number of years as a result of various regulatory drivers and good housekeeping
objectives. While a chosen practice provides some level of pollution prevention as it relates to the
management of stormwater discharges under this permit, the historic rationale behind implementing such
a practice is comprehensive of a number of contributing factors. The ongoing implementation of these
practices are part of the Stormwater Pollution Prevention Plan (SPPP). Table 2 from the Industrial
Stormwater Fact Sheet for Steam Electric Power Generating Facilities (EPA-833-F-06-030) was reviewed
and evaluated (provided in Appendix A) for planning of a BMP strategy. A high-level review of these
BMPs is provided below along with a rationale for implementing them. The detailed listing of these BMPs
for each drainage area is provided in the outfall descriptions (Appendix B) where information regarding
the industrial activities and significant sources of pollutants are also compiled. The compiled information
in the appendix captures an ongoing assessment process for BMP selection and implementation.
The Site Environmental Coordinator shall rely on Table 2 from EPA-833-F-06-030 for the improvement,
installation and implementation of BMPs to address data collected through monitoring of stormwater
discharges. The Site Environmental Coordinator may also rely on other sources of information to
implement other appropriate BMPs not listed in Table 2. This list of BMPs shall be reviewed and updated
annually as new practices are incorporated in the plan or warranted as a result of exceedances of
analytical monitoring benchmarks.
1.1 Coal Pile Management
Rainfall and upland stormwater may be contaminated as it is exposed to the coal pile if not managed
properly. The coal pile at the station is bermed on all sides limiting the potential for run-on and directing
coal pile runoff to the coal yard sump that are directed to the Lined Retention Basin.
1.2 Fugitive Dust Emissions
The potential for fugitive dust to move off -site or into drainage areas with no stormwater or sump controls
drives the need for emission management practices. The station maintains an air permit with NCDEQ that
includes the control of fugitive dust emissions as a programmatic requirement. Fugitive dust emissions
originating from a variety of sources are to be maintained to the Best Available Control Technology
emission limits for Particulate Matter with Nominal Aerodynamic Diameter of 10 Mircometers or Less
(PM10). Fugitive dust emissions are managed through a variety of practices including negative pressure
conditions during raw material unloading, watering of fine particulate materials prior to transport, periodic
wetting of haul roads, paving of heavily used gravel surfaces, tire and vehicle wash stations, and wetting
of placed landfill material. Contractors may be assigned at any time to perform services that generate
fugitive dust related to hauling or construction. As a result, fugitive dust control is typically a contractual
requirement of all contracted work.
1.3 Fuel Oil Unloading / Chemical Loading and Unloading / Miscellaneous
Loading and Unloading
The station maintains numerous locations for the loading and unloading of oil and non -oil liquids and
chemicals. The potential for spills and leaks to release to storm drains or overland drainage pathways to
receiving waters presents a source for an unauthorized discharge and contamination of stormwater
discharges. Loading/unloading operations follow typical spill prevention and control practices and adhere
to the Department of Transportation's unloading/loading procedures (49 CFR Part 177, Subpart B).
Additional BMPs include training, attendance of a qualified individual during transfer, use of tank level
indicators, maintenance of spill kit resources nearby, and the use of transfer containment devices. For
number of these transfers, an oil/water separator or yard drainage system with a sump is located down
gradient to capture spills and leaks for clean-up and prevent them from being discharged directly to
October 2019 Cardno Best Management Practices Summary 1
Allen Steam Station - BMP 20191028

Best Management Practices
Allen Steam Station
receiving waters. Operators make daily rounds to check containments and note on checklist housed in
SPCC plan. Accumulated stormwater is inspected before being discharged
1.4 Liquid Storage Tanks / Large Bulk Fuel Storage / Above Ground Tanks
The station maintains numerous storage tanks for oil and non -oil liquids and chemicals. The potential for
spills and leaks to release to storm drains or overland drainage pathways to receiving waters exists and
presents a source for an unauthorized discharge and contamination of stormwater discharges. The
station relies on a variety of practices to reduce exposure of leak and spills to stormwater discharges.
They include the use of valve controlled and secured secondary containment systems, secured
perimeters and barriers to prevent accidental damage and vandalism to tanks, level indicators and
gauges to detect leaks, lighting, routine disposal schedules, readily available spill kits and materials, and
active SPCC plan development, implementation, and training. For a number of these tanks, a yard
drainage system with a sump is located down gradient to capture spills and leaks for clean-up and
prevent them from being discharged directly to receiving waters. Operators make daily rounds to check
containments and note on checklist housed in SPCC plan. Accumulated stormwater is inspected before
being discharged
1.5 Oil Bearing Equipment Switchyards
There are two switchyards at the station near the powerhouse and numerous oil bearing equipment (e.g.,
transformers) located at various places throughout the station to support operations. The potential for
spills and leaks to release to storm drains or overland drainage pathways to receiving waters exists and
presents a source for an unauthorized discharge and contamination of stormwater discharges. The
station relies on the use of secondary containments around transformers and oil/water separators
downgradient of switchyards to intercept significant spills. These containments are inspected daily and
noted on checklist housed in SPCC plan. Accumulated stormwater is inspected before being discharged.
In addition, the switchyards are covered with gravel surfaces and lined with perimeter ditching to reduce
the conveyance of spills and provide for areas of collection. Both switchyards are located within yard
drainage areas with sumps that discharge ultimately to the Lined Retention Basin.
1.6 Residue Hauling Vehicles / Ash Loading Areas
Fly ash stored in covered silos is loaded into dump trucks and transported to the lined CCP landfill.
Gypsum is loaded into dump trucks and transported off -site. Dry bottom ash is moved by a submerged
conveyor system from the boilers to the Dry Bottom Ash Handling Area where it is processed and
transported by dump trucks to the lined CCP landfill. CCR materials have the potential to spill from trucks
or be carried away as dust, thereby contaminating surfaces that may be later exposed to stormwater
runoff. The materials are wetted prior to loading to prevent dust emissions and truck coverings are used
for hauling off -site where material may dry in transit. Loading areas are regularly washed down with wash
water and drained to a settling basin prior to discharging through the sump system and ultimately to the
Lined Retention Basin. The discharges from these loading areas are located within the yard drainage
system that convey runoff and wash water to the Lined Retention Basin. This keeps loading areas free
from dust generation. Truck wheel wash stations are located in loading and unloading areas and used to
limit the transport of residue to haul roads.
1.7 Vehicle and Equipment Maintenance
Vehicles and equipment have the potential to leak or spill significant quantities of fuel, hydraulic fluids,
and oils if not properly maintained and operated. There is potential for unauthorized discharges as the
vehicles and equipment operate near storm drains. Maintenance is performed on a routine basis to keep
vehicles and equipment operational, thereby reducing the potential for spills and leaks from mechanical
failure. To the extent practicable, maintenance is performed off -site at commercial facilities that are
subject to local laws and regulations regarding the disposal of used materials. When maintenance must
be performed on -site, it is performed under cover and with temporary containment devices used to
capture emptying of fluids. Used materials and parts are labeled and properly disposed of in original
containers or secured packaging. Where spills or leaks do occur, spill kits are readily available for use.
October 2019 Cardno Best Management Practices Summary 2
Allen Steam Station - BMP 20191028

Best Management Practices
Allen Steam Station
Operators make daily rounds to check containments and note on checklist housed in SPCC plan.
Accumulated stormwater is inspected before being discharged
1.8 Material Storage Areas
Limestone, coal, fly ash, and gypsum are the bulk materials stored at the station. Exposure of the
materials to rainfall and stormwater run-on has the potential to contaminate stormwater runoff. All
materials except fly ash are stored outdoors in piles that are bermed to prevent run-on or contained to
drain to detention basins and/or sumps and subsequently to the Lined Retention Basin.
1.9 Fueling Operations
Fueling is performed in two distinct ways that has the potential to contribute to significant quantities of
pollutants. Lighter, all purpose vehicles and equipment such as cars and trucks are fueled from a
stationary dispenser while heavier, dedicated equipment, such as earth moving equipment, are fueled by
mobile dispensers in the areas where they are used. The potential for spills and leaks to release to storm
drains or overland drainage pathways to receiving waters presents a source for an unauthorized
discharge and contamination of stormwater discharges. For the stationary fueling operations, the
dispensary equipment is checked regularly for leaks and functional operation. Spill kits are located nearby
for minor spills and leaks during fueling.
Mobile fueling operations are handled in the same way, but typically a temporary containment is set up to
capture leaks and spills. Operators make daily rounds to check containments and note on checklist
housed in SPCC plan. Accumulated stormwater is inspected before being discharged. Mobile fueling
operations are mostly performed in areas with yard drainage and sumps or leachate collection systems so
ultimately they discharge to the Lined Retention Basin.
October 2019 Cardno Best Management Practices Summary 3
Allen Steam Station - BMP 20191028

DUKE
. " ENERGY::
Location: Allen Steam Station
Outfall Narrative Description and BMP Summary Permit No. NCS000546
Outfall ID
SW010
Drainage Area
0.7 acre
Discharge Structure
12-inch-diameter CMP
Percent Impervious
0%
Location
Located south of station's
Permit Monitoring
1
intake structure
Table
Latitude - Longitude
35011'23"N - 81 000'27"W
Industrial Activities and
The drainage area for SW010 is comprised of rail lines immediately east of the
Description
Powerhouse and a grassed embankment located between the rail lines and
the intake structure. The area contains approximately 1,280 linear feet of rail
lines.
Significant
Coal and Limestone: Train cars carrying coal and limestone use the rail
Materials/Potential
lines that pass through this drainage area.
Pollutants
BMP Summary
Fugitive Dust Emissions
• Establish procedures to minimize off -site tracking of coal dust.
Delivery Vehicles
• Develop procedure for the inspection of all vehicles arriving on the
plant site and ensure overall integrity of the body or container.
Notes:
1. Outfall fact sheet provides documentation for permit sections for narrative description of potential
pollutants (Part II, Section A, 1.(b)) and BMP Summary (Part II, Section A, 2.(c)).

r7 DUKE
ENERGY.
Location: Allen Steam Station
Outfall Narrative Description and BMP Summary Permit No. NCS000546
Outfall ID
SW016
Drainage Area
21.8 acres
Discharge Structure
36-inch-diameter CMP
Percent Impervious
2%
Location
Located at the discharge
Permit Monitoring
1
canal on south bank
Table
Latitude - Longitude
35°11'22"N - 81°00'44"W
Industrial Activities and
The drainage area for SW016 encompasses primarily vegetated upland areas
Description
along the site access road south of the discharge canal. The drainage area
includes approximately 1,700 feet of the site paved access road, and
approximately 1,000 linear feet of the paved ash haul road. Ash haul trucks
use the ash haul road to transport ash from the dry ash handling facility to the
ash landfill. The drainage area also includes an additional 700 linear feet of
paved road south of the access road, approximately 1,000 linear feet of dirt
roads north of the access road, and a gravel -surfaced laydown and equipment
parking area north of the access road.
Significant
Ash: Fly ash is transported in ash haul trucks that use the ash haul road.
Materials/Potential
Pollutants
Inert Materials: Various quantities of structural steel, cable, truck
trailers, and other inert materials may be stored on the
gravel laydown yard area at various times.
BMP Summary
Fugitive Dust Emissions
• Establish procedures to minimize off -site tracking of fly ash,
such vehicle washing or automated wash stations.
Residue Hauling Vehicles
• Inspect all residue hauling vehicles for proper covering over the load,
adequate gate sealing, and overall integrity of the body or container.
Materials Storage Areas
• Cover material with a temporary covering made of water resistant
material
Notes:
1. Outfall fact sheet provides documentation for permit sections for narrative description of potential
pollutants (Part II, Section A, 1.(b)) and BMP Summary (Part II, Section A, 2.(c)).