NC0005088_Monitoring (Report)_20190424

DUKE
ENERGY
�caLNeo
April 24, 2019
Via Overnight Mail
Landon Davidson
Asheville Regional Office Regional Supervisor
North Carolina Department of Environmental Quality
Division of Water Resources
Water Resources - Water Quality Regional Operations
2090 U.S. 70 Highway
Swannanoa, NC 28778-8211
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
James Wells
Vice President
Environmental, Health and Safety
Programs & Environmental Sciences
526 South Church Street
Mail Code EC13K
Charlotte, NC 28202
[phone]
unnsiora of WwYor Resource
APR 2 6 2019
Water Quarth, ,(7 ona1 Operavons
Subject: Report Under Special Order by Consent — EMC SOC WQ S 17-009
Duke Energy Carolinas, LLC — Rogers Energy Complex
NPDES Permit NC0005088
2018 Annual Seep Survey Report
Dear Messrs. Davidson and Sledge:
On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Rogers Energy
Complex 2018 Annual Seep Survey Report summarizing the findings of the comprehensive survey
as required by the Rogers Energy Complex NPDES Permit NC0005088 Special Order by Consent
(SOC), SOC No. 517-009 Section 2.c.3).
As required by the SOC, I 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. I am aware that there are significant penalties for submitting false
information, including the possibility of fine and imprisonment for knowing violations.

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Messrs. Davidson and Sledge
April 24, 2019
Page 2
Please direct any questions concerning the Rogers Energy Complex NPDES Permit NC0005088
SOC No. S 17-009 to Robert Wylie at [phone] and to Chris Hallman at [phone]
relative to the annual seep inspection report.
Sincerely,
i ames vv ens
Vice Pre ident, Environment, Health & Safety -
Program and Environmental Sciences
Duke Energy
Attachment:
Rogers Energy Complex 2018 Annual Seep Survey
cc: Richard Baker, Duke Energy
Mike Disch, Duke Energy
Chris Hallman, Duke Energy
George Hamrick, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy

161P
synTerra
2018 ANNUAL SEEP REPORT
ROGERS ENERGY COMPLEX
CLIFFSIDE STEAM STATION
EMC SOC WQ S17-009
573 DUKE POWER ROAD
MOORESSORO, NC 28114
APRIL 2019
PREPARED FOR
DUKE ENERGY CAROLINAS� LLC
fm%, DUKE
*O'ENERGY.
CAROLlNAS
Erin N. Kin6fy, EIT
Project Engineer
Scott Spinner, NC LG #2243
Project Manager

0
2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
TABLE OF CONTENTS
SECTION
PAGE
1.0 INTRODUCTION............................................................................................................1
2.0 FINDINGS........................................................................................................................ 3
2.1 General Observations.................................................................................................. 3
2.2 Impact of Decanting..................................................................................................... 3
2.3 Changes to Seep Status................................................................................................ 3
3.0 REFERENCES................................................................................................................... 4
LIST OF FIGURES
Figure 1 SOC Locations and Inspection Areas
LIST OF TABLES
Table 1 SOC Locations and Descriptions-2018 Inspection
LIST OF APPENDICES
Appendix A Photographs
Page

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
LIST OF ACRONYMS
AOW
Areas of Wetness
CCR
Coal Combustion Residuals
EMC
Environmental Management Commission
SOC
Special Order by Consent
Page ii

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
1.0 INTRODUCTION
On May 9-10, 2018, Scott Spinner (NC L.G. #2243) and Chris Suttell (NC L.G. #2426) of
SynTerra inspected the Cliffside Steam Station (Cliffside or Site) for existing and
potential new areas of wetness (AOWs). The aforementioned activities were performed
in accordance with North Carolina Special Order by Consent EMC WQ #S17-009. That
Special Order by Consent (SOC) describes inspection requirements as follows:
Duke Energy shall conduct annual comprehensive surveys of areas down gradient of ash
basins identifying new seeps, and documenting the physical characteristics of previously
documented seeps. All examinations of seeps must include identification of seeps by
approximate latitude and longitude and date -stamped digital photographs of their
appearance. A report summarizing the findings of the surveys, including a section
analyzing the effect decanting of the basin(s) has on seep flows, accompanied by copies of
the photographs noted above ("Annual Seep Report"), shall be submitted to DWR in
conjunction with submittal of the April 30 quarterly report noted in 2(c)(2) above. This
Annual Seep Report must list any seep that has been dispositioned (as described below)
during the previous year, including an analysis of the manner of disposition.
All locations listed in Table 1 of the SOC were observed and documented with
photographs during the inspection.
General inspection observations include:
• No previously unidentified seeps were observed during the inspection.
• No notable changes to seep status were observed during this inspection.
• Decanting had not begun at the time of this inspection.
Inspection Details
Weather during the inspection was clear and no precipitation occurred. Overnight
between May 7 and May 8, 0.11" of rain fell according to the onsite rain gage.
Temperatures ranged from approximately 70 to 80 degrees F.
The inspectors reviewed previous AOW inspection reports and the weekly dam safety
inspection reports for each ash basin. Jessica Snyder, P.E. (Duke Energy system owner)
conducted the ash basin dam safety inspections and prepared the reports. Ms. Snyder
and Mr. Steve Hodges (Duke Energy Site Environmental Coordinator) were
interviewed concerning recent rainfall amounts, recent construction/stabilization
projects associated with the ash basins, and general site conditions in and around the
Page 1

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
ash basins. Observations from the dam safety inspection reports were consistent with
observations made during the SOC inspections.
The inspection included observations in the following areas (Figure 1):
• Along the Broad River north of the Inactive Unit 5 Ash Basin
• Between Inactive Unit 5 Ash Basin and Unit 5
• Along the Broad River northeast of the Former Units 1-4 Ash Basin
• Along the Broad River north of the Ash Storage Area
• Along the Broad River north of the Active Ash Basin
• Along the eastern bank of the Suck Creek adjacent the Active Ash Basin
The inspection scope of work also included a review of the areas identified as
downgradient of ash basins. SOC locations are shown on Figure 1. Observations noted
during the inspection are summarized on Table 1. Photographs of each seep location
are included in Appendix A.
Page 2

' 1
2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
2.0 FINDINGS
2.1 General Observations
Inspection observations are shown for each seep in Table 1. Details include:
AOW conditions were found to be generally similar to conditions in previous
inspections
• Seeps S-37 and S-38 were identified as a part of the 2019 inspection.
2.2 Impact of Decanting
Decanting of the ash basin at Cliffside had not yet begun at the time of this inspection.
2.3 Changes to Seep Status
Mr. Spinner and Mr. Suttell inspected each seep to evaluate whether it may be
dispositioned in accordance with the SOC. The requirements for dispositioning a seep
are as follows:
For purposes of this Special Order, "dispositioned" includes the following: (1) the seep is
dry for at least three consecutive quarters; (2) the seep does not constitute, and does not
flow to, waters of the State or Waters of the United States for three consecutive quarters;
(3) the seep is no longer impacted by flow from any coal ash basin as determined by the
Director of DWR in accord with applicable law and best professional judgment; or (4) the
seep has been otherwise eliminated (e.g., through an engineering solution). If a seep that
has been dispositioned through drying up reappears in any subsequent survey, such a
seep will no longer be deemed dispositioned and can be subsequently re-dispositioned as
specified above. Non -constructed seeps described in paragraph 1(h) of this SOC cannot be
dispositioned through option (2) above.
Seeps dispositioned during 2018 were done so at the time of the SOC issuance. Table 1
lists those seeps dispositioned and the basis for disposition. Seeps identified as
dispositioned at Cliffside are S-01, S-05, S-08, S-09, S-10, S-11, S-12, S-13, S-17, S-20, S-22,
S-24, S-25, S-26, S-33, S-34, and S-35. These dispositioned seeps will continue to be
inspected and evaluated for any change in flow conditons.
In general, there was no change in status of the dispositioned seeps and no change in
status of remaining seeps observed during this inspection.
Seeps S-37 and S-38 were identified as a part of the 2019 inspection. Information
regarding these seeps will be presented in the 2019 Annual Seep Report.
Page 3

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
3.0 REFERENCES
NCDEQ. (2018). Special Order by Consent EMC SOC WQ S17-009.
Page 4

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
APPENDIX A
PHOTOGRAPHS

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
synTerra

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
Outf all 104 (S-04) I View of NPDES Outfa11104 (S-04) facing north.
41P
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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OUtfall 106 (5-06) I View of NPDES Outfall 106 (S-06) facing east.
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
S-08 I View of dispositioned seep location facing northeast.
I&3
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC
SynTerra
S-10 I View of dispositioned seep location facing northeast.
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
L
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
4
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
S-16 I View of seep location facing northwest.
synTerra

2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
S-18 View of seep location facing north-northwest.
SynTerra

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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
S-20 I View of dispositioned seep location facing east.
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
i� A.. : is
S-26 View of dispositioned seep location facing south.
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2018 Annual Seep Report April 2019 I
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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` 2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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2018 Annual Seep Report April 2019
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC SynTerra
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2018 Annual Seep Report
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC
kpril 2019
SynTerra
S-36 View of seep location facing southeast.
0107°E (T) U 35.210289°N, 81.753868°W ±16.4ft A 733ft
S-37 View of seep location facing southeast. Seep was identified as a part of the
2019 inspection, detailed information will be provided in the 2019 report.
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2018 Annual Seep Report
Rogers Energy Complex - Cliffside Steam Station, Duke Energy Carolinas, LLC
kpril 2019
SynTerra
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