NC0005088_Report_20200526

DUKE James Wells
Nk, ENERGY® Vice President
Environmental, Health and Safety
Programs&Environmental Sciences
526 South Church Street
Charlotte, NC 28202
[phone]
May 26, 2020
Via Overnight Mail RECEIVED
JUN 01 2020
S. Daniel Smith
Director of Water Resources NCDEQlDWRINPDES
North Carolina Department of Environmental Quality
1617 Mail Service Center
Raleigh,NC 27699-1617
Bob Sledge
North Carolina Department of Environmental Quality
Division of Water Resources
Water Quality Permitting Program
1617 Mail Service Center
Raleigh,NC 27699-1617
Subject: Report Under Special Order by Consent—EMC SOC WQ S 17-009
Duke Energy Carolinas, LLC—Rogers Energy Complex
NPDES Permit NC0005088
Final Seep Report
Dear Messrs. Smith and Sledge:
On behalf of Duke Energy Carolinas, LLC (DEC), I am submitting to you the Rogers Energy
Complex Final Seep Report summarizing the findings of the comprehensive survey completed
following completion of decanting as required by the Rogers Energy Complex NPDES Permit
NC0005088 Special Order by Consent (SOC), SOC No. S 17-009 Section 2.c.4). Completion of
decanting occurred at Rogers on March 3, 2020.
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.

MayMessrs26.,Smith2020 and Sledge
Page 2
Please direct any questions concerning the Rogers Energy Complex NPDES Permit NC0005088
SOC No. S17-009 to Robert Wylie at(704) 382-4669 and to Chris Hallman at(980) 373-7892
regarding this Final Seep Report.
Sincerely,
Ctlibta0164-
James Wells
Vice President, Environment, Health& Safety-
Programs and Environmental Sciences
Duke Energy
Attachment:
Rogers Energy Complex 2020 Final Seep Report
cc: Richard Baker, Duke Energy
Robert Wylie, Duke Energy
Shannon Langley, Duke Energy
Chris Hallman, Duke Energy
Steve Hodges, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy

synTerra
2020 FINAL SEEP REPORT
ROGERS ENERGY COMPLEX
CLIFFSIDE STEAM STATION
EMC SOC WQ S17-009
573 DUKE POWER ROAD
MOORESBORO, NC 28114
MAY 2020
PREPARED FOR
Catill) DUKE
ENERGY.
CAROLINAS
DUKE ENERGY CAROLINAS, LLC
Tim Grant
Project Scientist
J.1.472
Scott Spinner, NC LG #2243
Project Manager

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
TABLE OF CONTENTS
SECTION PAGE
1.0 INTRODUCTION 1-1
1.1 Inspection Details 1-2
2.0 FINDINGS 2-1
2.1 General Observations 2-1
2.2 Effects of Decanting 2-1
2.3 Changes to Seep Status 2-2
3.0 REFERENCES 3-1
LIST OF FIGURES
Figure 1 Seep Locations and Inspection Areas
LIST OF TABLES
Table 1 Seep Locations and Descriptions—March 2020 Inspection
LIST OF APPENDICES
Appendix A Photographs
Page i

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
1.0 INTRODUCTION
On March 30, 2020, Scott Spinner (NC L.G. #2243) of SynTerra inspected the Cliffside
Steam Station (Cliffside or Site) property for existing and potential new seeps.
Inspection activities were performed in accordance with North Carolina Environmental
Management Commission(EMC) Special Order by Consent(SOC) EMC WQ #S17-009.
The SOC describes inspection requirements as follows:
No later than 90 days following the completion of decanting at each Facility, and
in the same manner as in the annual surveys, Duke Energy shall conduct a
comprehensive survey 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 this survey, including a section analyzing the effect
decanting of the basins(s) has had on seep flows, accompanied by copies of the
photographs noted above, shall be submitted to the Director of DWR ("Final Seep
Report"). This Final Seep Report must list any seep that has been dispositioned
(as described in subparagraph (3) above) during decanting process, including an
analysis of the manner of disposition. The determination of whether a seep is
dispositioned rests with the Director of DWR. At, or at any time prior to,
submission of the Final Seep Report, Duke Energy shall seek formal certification
from the Director of DWR, certifying the disposition of any seep that Duke
Energy has characterized as dispositioned. Any seeps not certified as
dispositioned by the Director of DWR shall not be deemed as dispositioned.
All locations listed in Table 1 of the SOC were observed and documented with
photographs during the inspection.
General inspection observations include:
• Several seeps located southwest, west, and north of the active ash basin are dry
or exhibit significantly reduced flow as a result of decanting.
• Seeps unaffected by decanting of the active ash basin were found to be generally
similar to observed conditions in previous inspections.
• A new seep, S-39, was identified west of the Unit 5 inactive ash basin with flow
that reaches an unnamed tributary to the Broad River.
Page 1-1

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
1.1 Inspection Details
During the inspection, the weather was clear and no precipitation occurred. The most
recent rain event was 1.8 inches on March 24, 2020, according to the on-Site rain gage.
Temperatures ranged from approximately 60 to 75 degrees Fahrenheit(F).
The inspector reviewed previous seep inspection reports and the weekly dam safety
inspection reports pertaining to each ash basin. Patrick Dunn (Duke Energy System
Owner) conducted the ash basin dam safety inspections and prepared the reports.
Mr. Steve Hodges (Environmental Coordinator) was interviewed about recent rainfall,
recent construction/stabilization projects associated with the ash basins, and general Site
conditions in and surrounding the ash basins. Observations from the dam safety
inspection reports were consistent with observations made during the seep inspection.
The inspection included observations in the following areas (Figure 1):
• Along the Broad River, north of the Unit 5 inactive ash basin
• Between Unit 5 inactive ash basin and Unit 5 power plant
• 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 Suck Creek, adjacent to the active ash basin
• Areas along and downgradient of the ash basins
Seep locations and inspection areas are shown on Figure 1. Observations noted during
the inspection are summarized on Table 1. Photographs taken of each seep location
during the inspection are included in Appendix A.
Page 1-2

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
2.0 FINDINGS
2.1 General Observations
Inspection observations of each seep are described in Table 1. Details include:
• Several seeps located southwest, west, and north of the active ash basin are dry
or exhibit significantly reduced flow as a result of decanting.
• Seeps unaffected by decanting of the active ash basin were found to be generally
similar to observed conditions in previous inspections.
• A new seep, S-39, was identified west of the Unit 5 inactive ash basin with flow
that reaches the unnamed tributary to the Broad River.
• No previously unidentified or unreported pipes were observed during
inspection.
2.2 Effects of Decanting
Decanting of free water from the active ash basin began and wastewater inflows to the
active ash basin ceased on March 31, 2019.
Duke Energy provided a Notification for Completion of Decanting letter to the North
Carolina Department of Environmental Quality (NCDEQ) Division of Water
Resources (DWR) on April 2, 2020. The notification indicated that decanting of the
active ash basin was completed on March 3, 2020.
The annual seep inspection occurred 27 days after the completion of decanting,
approximately one year after wastewater inflows to the active ash basin ceased and
decanting began.
Decanting of the active ash basin has reduced seep flow in areas southwest, west, and
north of the active ash basin. Southwest of the active ash basin, no flow was observed at
seeps S-28, S-31, S-32, and S-37. Seeps S-29 and S-30 exhibited reduced flow compared
to previous observations. West of the active ash basin, near the toe of the upstream
dam, no flow was observed at seeps S-14, S-15, S-16, S-21, and S-27. North of the active
ash basin, seeps S-24 and S-25 exhibited reduced flow compared to previous
observations.
Page 2-1

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
2.3 Changes to Seep Status
Mr. Spinner inspected each seep to evaluate whether it met requirements to 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 such that concentrations of all pollutants listed in Attachment B meet State
criteria for four consecutive sampling events with at least seven days separating
each event; 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.
If similar or drier seep conditions persist around the active ash basin, seeps S-14, S-15,
S-16, S-21, S-27, S-28, S-31, and S-37 will likely be candidates to be dispositioned after
observation in the second quarter of 2020.
Seeps S-10 and S-11, which had previously been dispositioned, were observed to be
flowing and reaching the Broad River. Those seeps will no longer be deemed
dispositioned per the SOC.
Seep S-39 was identified during the annual inspection and is located west of the Unit 5
inactive ash basin. The seep did not exhibit sufficient flow to be sampled during the
annual inspection but will be continue to be monitored.
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2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
3.0 REFERENCES
Duke Energy Carolinas, LLC. (April 2, 2020).Rogers Energy Complex, Special Order by
Consent, EMC SOC WQ S17-009, Notification for Completion of Decanting.
North Carolina Department of Environmental Quality. (2018). Special Order by Consent
EMC SOC WQ S17-009.
Page 3-1

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
FIGURE

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
TABLE

TABLE 1
SEEP LOCATIONS AND DESCRIPTIONS - MARCH 2020 INSPECTION
2020 FINAL SEEP REPORT
ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Location Coordinates Receiving Receiving
Facility Sample ID Waterbody Waterbody Description*** SOC Monitoring Interim Action Levels Notes from Inspection
Latitude Longitude Classification
* Steady flow within 3 foot wide stream located northwest of Iron oxidizing bacteria apparent on substrate near the outlet of
Cliffside S-01 35.215639 -81.775344 Broad River WS-IV Unit 5 inactive ash basin. NA - Seep Dispositioned NA - Seep Dispositioned the draw. Steady flow consistently observed within a well-
defined channel.
Seep drainage in wetland area via 1-2 foot wide stream pH 5-10 S.U.
channel, located north of the Unit 5 inactive ash basin. Monitoring at established Hardness 800 mg/L
Cliffside S-02 35.217217 -81.768678 UT to Broad WS-IV Drainage collects seep flows from S-18, S-19 and S-19A. Flows Duke Energy S-02 Mercury 0.1 Ng/L Flow is steady and clear. Orange aerobic bacteria/floc/iron
River north to the Broad River at a point approximately 50 feet monitoring site Sulfates 500 mg/L oxidation apparent on substrate.
downstream of the Unit 5 inactive ash basin discharge outfall. TDS 1000 mg/L
Thallium 0.5 pq/L
Three pipes observed from the bank. Two pipes are 6"
Minor seepage and groundwater influence from former Units 1-
terracotta and are dry. One pipe is a 10" corrugated steel pipe
Cliffside S-03 35.22001 -81.7577 Broad River WS-IV 4 ash basin area to sample point within former condenser Broad River Instream NA - 2B Standards Apply that has corroded at the base. Seepage emerges from the bank
circulating water discharge canal for retired Units 1-4. Monitoring below the pipe. Flow is steady from below the steel pipe and
orange aerobic bacteria/floc/iron-oxidation is apparent on
substrate. White precipitate observed.
Cliffside 5 05* 35.218147 -81.749844 Broad River WS-IV
Diffuse flow emerging from a small area along the bank of the
Broad River and base of the active ash basin. NA Seep Dispositioned NA Seep Dispositioned No flow or wetness observed.
•
UT to Broad Steady, clear and braided stream that flows in a relatively level Monitoring at established Flow infiltrates at berm between river and stream. Overland
Cliffside S-07 35.218642 -81.745975 WS-IV area northeast of the active ash basin at edge of property line. Duke Energy S-07 pH 5-10 S.U.
River flow discharge to the river was not observed.
Flow is north to Broad River. monitoring site
Cliffside S-08* 35.208547 -81.755781 Suck Creek WS-IV Natural conveyance tributary to Suck Creek NA - Seep Dispositioned NA - Seep Dispositioned Silty and sandy substrate with no apparent floc/iron-oxidation.
Similar to previous inspections.
Cliffside 5 09* 35.217122 -81.754244 Suck Creek WS-IV Minor, diffuse flow to Suck Creek near confluence with Broad Flow observed on rock face entering Suck Creek. Orange
River. NA Seep Dispositioned NA Seep Dispositioned aerobic bacteria/floc/iron-oxidation apparent on substrate.
Seep located near bank of Broad River, adjacent to former Broad River Instream Braided flow from 4 to 5 locations. Sandy and silty substrate
Cliffside S-10 35.219472 -81.756731 Broad River WS-IV Units 1-4 ash basin. Minor flow in distinct or braided channels. Monitoring NA - 2B Standards Apply with apparent orange aerobic bacteria/floc/iron-oxidation. (Seep
no longer considered dispositioned due to flow.)
Sandy and silty substrate with slight orange aerobic
Cliffside S it 35.2194 81.756617 Broad River WS-IV Seep located near bank of Broad River, adjacent to former Broad River Instream NA 2B Standards Apply bacteria/floc/iron-oxidation observed. Flow rate is a trickle with
Units 1-4 ash basin. Minor flow in distinct or braided channels. Monitoring seepage from 3 or 4 locations below rip-rap. (Seep no longer
considered dispositioned due to flow.)
Diffuse seepage to area of wetness with no defined channel on Water relatively clear with flow at a trickle. Orange aerobic
Cliffside S-12* 35.217658 -81.751783 Broad River WS-IV bank of Broad River below ash storage area. Area of wetness NA - Seep Dispositioned NA - Seep Dispositioned bacteria/floc/iron-oxidation apparent on substrate. Flow
does not reach surface waters. emerging from bank and flowing toward, but not reaching the
Broad River.
Minor flow was located at bank of Broad River, adjacent to
Cliffside S-13** 35.218353 -81.754942 Broad River WS-IV former Units 1-4 ash basin. Following ash basin excavation, NA - Seep Dispositioned NA - Seep Dispositioned No flow or wetness observed.
seep has disappeared.
Seepage located along toe of upstream dam of the active ash Suck Creek Instream
Cliffside S-14 35.214511 -81.755844 Suck Creek WS-IV basin. Area of wetness - no flowing water observed. Any flow NA - 2B Standards Apply Pooled water by sign, but no flow toward Suck Creek.
would move toward Suck Creek. Monitoring
Second seepage area located along toe of upstream dam of
Cliffside S-15 35.214297 -81.756117 Suck Creek WS-IV the active ash basin. Area of wetness no flowing water Suck Creek Instream NA - 2B Standards Apply No flow or wetness observed.
observed. Any flow could move via poorly incised channel Monitoring
toward Suck Creek.
Third seepage area located along toe of upstream dam of the Suck Creek Instream
Cliffside S-16 35.2141 -81.756208 Suck Creek WS-IV active ash basin. Any minor flow could move via channelized NA - 2B Standards Apply No flow or wetness observed.
Monitoring
area toward Suck Creek.
Page 1 of 3

7
TABLE 1
SEEP LOCATIONS AND DESCRIPTIONS - MARCH 2020 INSPECTION
2020 FINAL SEEP REPORT
ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Location Coordinates Receiving Receiving
Facility Sample ID Waterbody Waterbody Description*** SOC Monitoring Interim Action Levels Notes from Inspection
Latitude Longitude Classification
Cliffside S-17** 35.217192 -81.769272 Broad River WS-IV Minor seep at river edge and below the ordinary high water NA - Seep Dispositioned NA - Seep Dispositioned No flow or wetness observed.
level of Broad River, west (upstream) of S-02.
UT to Broad Seepage from riprap at toe of Unit 5 inactive ash basin. Flows Monitoring at S-02 Flow converges to create S-02, then on to Broad River. Orange
Cliffside S-18 35.216439 -81.768564 River WS-IV north into wetland area draining to sampling site S-02. monitoring site See S 02 aerobic bacteria/floc/iron-oxidation apparent on substrate.
UT to Broad Seepage from wooded area at toe of Unit 5 inactive ash basin. Monitoring at S-02 Flow converges to create S-02, then on to Broad River. Orange
Cliffside S-19 35.216361 -81.768681 River WS-IV Flows north into wetland area draining to sampling site S-02. monitoring site See S 02 aerobic bacteria/floc/iron-oxidation apparent on substrate.
Cliffside S-19A 35.216581 81.769217 Broad River WS-IV Seepage from wooded area at toe of Unit 5 inactive ash basin. Monitoring at S-02 Flow converges to create S-02, then on to Broad River. Orange
Flows north into wetland area draining to sampling site S-02. monitoring site See S-02 aerobic bacteria/floc/iron-oxidation apparent on substrate.
Cliffside S 20** 35.215856 81.765217 Broad River WS-IV Stagnant seep at toe of northeast side of Unit 5 inactive ash NA Seep Dispositioned NA Seep Dispositioned Seep not visible in area of rip-rap repair. Water exists in ditch
basin. Seep dispositioned via repair. farther downgradient near the cooling tower.
Seep located along toe of the active ash basin upstream dam. Suck Creek Instream
Cliffside S-21 35.214625 -81.755953 Suck Creek WS-IV Area of wetness - no flowing water observed. Any flow would NA - 2B Standards Apply No flow or wetness observed.
Monitoring
move toward Suck Creek.
Cliffside S-22** 35.218278 -81.748258 WS-IV Pipe has been plugged; discharge eliminated. NA - Seep Dispositioned NA - Seep Dispositioned Pipe is plugged and not visible, no discharge.
Seep to pooled area adjacent to the Broad River, located north Broad River Instream Ponded water present at seep emergence. Visible flows reaching
Cliffside S-23 35.217994 -81.750208 Broad River WS-IV of the active ash basin. Minor seepage from pool emerges with Monitoring NA - 2B Standards Apply Broad River to the east of where this flow is usually observed.
any minor flow draining north to the Broad River.
Cliffside S 24* 35.218139 81.749428 Broad River WS-IV Minor seepage near bank of Broad River and north of active NA Seep Dispositioned NA Seep Dispositioned Sandy and silty substrate. Stable with less flow than usually
ash basin. observed. Flow reaching the Broad River.
Minor seepage north of ash storage area. No measurable flow Wet with flow near the placard, then infiltrates the ground prior
Cliffside S-25** 35.217689 -81.751894 Broad River WS-IV NA - Seep Dispositioned NA - Seep Dispositioned to reaching the Broad River. Less flow than previous
has been observed throughout site history. inspections.
* Seepage from steep bank and eroded head cut near bank of Sandy and silty substrate with rock outcrops. Flow is a trickle
Cliffside S-26 35.217425 -81.753931 Suck Creek WS-IV NA - Seep Dispositioned NA - Seep Dispositioned emanating from rock outcrop. Flow in channel does not enter
Suck Creek.
Suck Creek.
Seep located along toe of the active ash basin upstream dam.
Cliffside S-27 35.21383 -81.756478 Suck Creek WS-IV Area of wetness - no flowing water observed. Any flow would Suck Creek Instream NA - 2B Standards Apply No flow or wetness observed.
Monitoring
move toward Suck Creek.
Cliffside S-28 35.211677 -81.753876 Suck Creek WS-IV Minor diffuse groundwater seepage along steep bank of Suck Suck Creek Instream NA - 2B Standards Apply No flow or wetness observed.
Creek, west of the active ash basin. Monitoring
Minor diffuse groundwater seepage along steep bank of Suck Suck Creek Instream Flow is low and clear. Orange aerobic bacteria/floc/iron
Cliffside S-29 35.211542 -81.753993 Suck Creek WS-IV Creek, west of the active ash basin. Monitoring NA - 2B Standards Apply oxidation apparent on substrate. Less flow than previous
inspections; water trickles over rock to Suck Creek.
Minor diffuse groundwater seepage along steep bank of Suck Suck Creek Instream Flow discharges across several areas toward Suck Creek over
Cliffside S-30 35.211496 -81.75391 Suck Creek WS-IV Creek, west of the active ash basin. Monitoring NA - 2B Standards Apply rocks and as drip faces along the bank. Less flow than previous
inspections.
Cliffside S-31 35.211482 -81.753887 Suck Creek WS-IV Minor diffuse groundwater seepage along steep bank of Suck Suck Creek Instream NA - 2B Standards Apply No flow or wetness observed.
Creek, west of the active ash basin. Monitoring
Page 2 of 3

TABLE 1
SEEP LOCATIONS AND DESCRIPTIONS - MARCH 2020 INSPECTION
2020 FINAL SEEP REPORT
ROGERS ENERGY COMPLEX - CLIFFSIDE STEAM STATION
DUKE ENERGY CAROLINAS, LLC, MOORESBORO, NC
Location Coordinates Receiving Receiving
Facility Sample ID Waterbody Waterbody Description*** SOC Monitoring Interim Action Levels Notes from Inspection
Latitude Longitude Classification
Cliffside S-32 35.211258 81.753646 Suck Creek WS-IV Minor diffuse groundwater seepage along steep bank of Suck Suck Creek Instream NA 2B Standards Apply Area is wet but not flowing. Wetness does not reach Suck
Creek, west of the active ash basin. Monitoring Creek.
Seep was located at bank of Broad River, adjacent to former
Cliffside S-33** 35.218272 -81.754754 Broad River WS-IV Units 1-4 ash basin. Following ash basin excavation and NA - Seep Dispositioned NA - Seep Dispositioned No flow or wetness observed.
construction of NPDES outfall structure, seep has disappeared.
Cliffside S 34* 35.217556 -81.753725 Suck Creek WS-IV
Seepage from steep bank and eroded head cut near bank of
Suck Creek. NA - Seep Dispositioned NA - Seep Dispositioned No flow or wetness observed.
Infiltrates prior to entering tributary. Sandy and silty with minor
Cliffside S-35* 35.208203 -81.755703 Suck Creek WS-IV Natural conveyance near bank of Suck Creek. NA - Seep Dispositioned NA - Seep Dispositioned amounts of iron-oxidizing bacteria observed at the confluence of
the tributary.
Cliffside S-36 35.210258 -81.753983 Suck Creek WS-IV Minor diffuse groundwater seepage along bank of Suck Creek, Suck Creek Instream NA - 2B Standards Apply Steady trickle flow from three drip faces.
southwest of the active ash basin. Monitoring
Seep located approximately 20 feet downstream of S-36 and
Cliffside S-37 35.210266 81.753827 Suck Creek WS-IV southwest of the active ash basin. Flow emerges 25 feet from Suck Creek Instream Notable iron staining and floc present. Ponded water at point of
Suck Creek as standing water which becomes shallow, flowing, Monitoring NA 2B Standards Apply emanation but no flow toward or into Suck Creek.
and somewhat diffuse as it flows toward Suck Creek.
Seep emerges near the ordinary high water mark of the Broad
Cliffside S-38 35.217759 81.752742 Broad River WS-IV River north of the active ash basin. Flow is low and travels Broad River Instream NA 2B Standards Apply Flow is low and not apparent when river levels are high. Iron
through multiple channels in sandy shoreline substrate toward Monitoring staining present on sandy substrate. Flow reaches Broad River.
the Broad River.
Seeps Discovered During 2020 Inspection
UT to Broad Flow emerges from three locations along bank of unnamed Flow emerges from three locations along bank of unnamed
Cliffside S-39 35.217759 -81.752742 WS-IV tributary to the Broad River. Flow is a trickle from each Broad River Instream NA - 2B Standards Apply tributary to the Broad River. Flow is a trickle from each
River Monitoring
emergent point. emergent point. Insufficient volume to sample.
NPDES Locations
Seepage from bank downgradient of active ash basin and ash Steady flow consistently within a well-defined rip-rap channel.
Outfall 104 storage area to a channel flowingtoward the Broad River. NA - Monitoredper Terms NA NPDES Permit Siltyand clayey sand beneath rip-rap. Orange aerobic
Cliffside 35.217641 -81.752596 Broad River WS-IV g Discharge Limitations y y p p' 9
(formerly S-04) Outfall has been improved with riprap reinforcement along of the NPDES Permit bacteria/floc/iron oxidizing bacteria apparent on rip-rap
banks and flows through a V-notch weir. Apply substrate along channel.
Steady stream with moderate flow volume within well-defined NA - NPDES Permit Steady moderate flow. Water is clear. Seepage observed at toe
Outfall 106 NA - Monitored per Terms of the dam at/near the rip-rap pile. Vegetation conceals some
Cliffside 35.21844 -81.748266 Broad River WS-IV channel at toe drain for active ash basin downstream dam, Discharge Limitations
(formerly S 06) near the confluence with the Broad River. of the NPDES Permit Apply flow. Orange aerobic bacterial/floc/iron-oxidation apparent on
substrate along channel, especially apparent in eddies.
Prepared by:KDF Checked by:GTC
Notes:
Revised by:SAS Checked by:T]G
*-Location previously investigated as a seep.Monitoring has not indicated the presence of coal combustion residuals.
**-Seep dispositioned via repair and/or non-flowing condition to potentially reach Waters of the U.S.,or other,as noted.
***-Some descriptions have been updated from the original text found in the SOC Attachment A table for accuracy and currency.
pg/L-micrograms per liter
28-15A NCAC 02L.0202 Standard
mg/L-milligrams per liter
NA-Not Applicable
NPDES-National Pollutant Discharge Elimination System
S.U.-Standard Units
SOC-Special Order by Consent
TDS-Total Dissolved Solids
UT-Unnamed Tributary
Page 3 of 3

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
APPENDIX A
PHOTOGRAPHS

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
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Page 1 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
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.. .
t
w
Y} ::
. 1« .er �:,- :': ''0, 14:18:02
S-02 View of seep and Sc)(. sample location facing northeast.
Page 2 of 55

,
2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
S 1/1i w
180 210 240 270
• I • I • I • I • 1 • I • I • I • I • I • I • I • I • i
0 224°SW (T) 35°13.202'N, 81°45.4,65'W ±45ft A 683ft
L
,
•
•
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r
ry
rol f; ;;.
S-03 View of seep location facing southwest.
•
Page 3 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW1
N NE
u 3uU 330 0 30
0 342°N (T) CO) 35°13.061'N, 81°45.162'W ±16ft • 648ft
''.�- --
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t
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9 NV
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It*
30 Mar 2020, 18:2'7:44.
Outf all 104
View of NPDES Outfall 104 facing north-northwest.
(formerly S-04)
Page 4 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW _ N NE
300 330 0 30 60
SI • I • I • I • I • I • I • I • I • I • I • I • I • I
® 353°N (T) (1) 35°13.083'N, 81°45.078'W ±32ft • 642ft
l /
, y 1
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« 8 as tl k:�
4 r ip. 11Ps . "
p
14
e,- ' —� P�`
a
30 Mar 2020, 18:15:22
S-05 View of dispositioned seep location facing north.
Page 5 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW N NE E
730o so 1:
• I • 1 • 1 • 1 I • I • I • 1 • 1 • i • i I I 1 I I • I • I .
®25°NE(T) OO 35°13.106'N,81°44.899'W±32ft ♦ 672ft
' 411.
I 1 .
g ., "s.,
f
.
'
osi
y N ei. * 30 Mar 2020. 18:,
Outf all 106
(formerly S-06) View of NPDES Outfall 106 facing north-northeast.
.E S SL ' W NW
5c 180 ��;
• 1 • 1 • 1 • 1 • I I I • I` I • I • t • I • I • I • I • I • I I • I
0228°SW(T) *35°13.111'N,81°44.756'W±16ft A 710ft
J py h,s A rt�t, -mot i�
1 '4." aF, �J'
•
, , I •t i * +` ', ' ti :., ,,t
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, . ... ,.
, .__
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.• _,... A . _ -„,.. ...„. ....._ ,
•
7SI�
1 S-07 View of seep and SOC sample location facing southwest.
Page 6 of 55

2020 Final See P P Re port Ma 2020
Y
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW I'll NE
uu 330 0 30
. 1 . l . 1 . 1 . 1 . 1 . . i l l
0 344°N (T) • 35°12.514'N, 81°45.392'W ±32ft ♦ 788ft
Y; * ° may?�
i
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1 x
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t. a'
, ,,;.,, , ,r , , :. ..,,. .. ;I:
r t.
£ ry : 7f•+t0,.."4+] W
30 Mar 2020, 16:10.09
S-08 View of dispositioned seep location facing north-northwest.
Page 7 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SE S SW
120 150 180 210 240
• • I • I • I • I I • I • I • I • 11 • I • I •
0 186°S (T) c% 35°13.044'N, 81°45.243'W ±32ft ♦ 676ft
0.41
r S 1 Z Mti i � H er •
•
O3 irJ ' $•
,„
•
•
•
e N�
ti 1 .
"' .. 30 Mar 2020, 12:1
S-09 View of dispositioned seep location facing south.
Page 8 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
E E SE S
60 90 120 150 180
0 114°SE (T) ' ' 35°13.167'N, 81°45.401'W ±16ft A 645ft
, art` - ; r ' j
-- I w ,
r,te
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r
'. t.• dor--:' ''-'s :7„''",,,,' . ,.., ,.:41. ',. „„,_, ..,. .
. 77'
F
O 4120, 1: 04
S-10 View of seep location facing east-southeast.
Page 9 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
W riw N
270 300 330 0
• I . I • I . I . I • I • l • I . I • I • I • III • I
® 314°NW (T) 1 35°13.163'N, 81°45.398'W ±16ft ♦ 642ft
, :4!:.4
..,,
_ . 1 rtito'r, Nill,4 \R 0
- 1
' ' ' '**- ''.... Wt .AAP ' ',, ',..,, it I/
1 c is ... 'rv,
: 43'. °' '' ; 1
ry X�•
,',,, ,II.,
1. • : 4°°fit.--4-4
„
30 Mar 2020. a9r
S-10 View of seep location facing northwest.
Page 10 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW 11 NE
300 330 30 (i0
I • I • I • I • I • I • I • ! • I • I • I • I • I • I •
® 358°N (T) O 35°13.159'N, 81°45.383'W ±16ft ♦ 658ft
_ ... -- r fro; 7—,- -- ry, ,::"--,,,...
_' i_srt- —
w
-aim - M -mac
sal•+... �� °-'^ .Z" ,." ..
.-•-*
x
or, �,.
I I.
a
i
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l
a e,,
'tar 20 = :,4:07
S-I I View of seep location facing n(,1111.
Page 11 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
.W W NW N
240 270 ''00 330 0
• I • I • I • I • I • I • I • I I • i • I • I • I • I
o c c
0 293 W (T) o 35 13.162 N, 81 45.390'W ±16ft ♦ 653ft,
7,4, , "Nile-
w
• I 11/4,":';''..'f,.,', .' '*..%,, tr', 4.,,V ''
vir,,,„,,dir, , 44, 0,.,.. 1,,.4, ,,.:.,4
r'. T` *JIB ,'!
y�,+Ip .. cd
0 7
'r y i,; .ti, ..4 1.
i
rvv
ri
^
ry
tro,,,
s?' 46 ,2,020. 11:44:30
S-11 View of seep location facing west-northwest.
Page 12 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
•
NW N NE E
300 330 a cis aU
1 • 1 • I • I • I I • I • 1 I • 1 • 1 • i 1 • 1 • 1 • 1 • 1 • 1 • I
®12°N (T) • 35°13.053'N, 81°45.121'W±16ft ♦ 699ft
--� z ti • ( t•* z` y u ` ti. as r{!�' ' `
`� ',,�_�•�w �01. `5 ry 1�1 aaa . �2 '"— :
't,...Iv.,"•071..,..,: ,., '''.0.7,' .1.7,t, .2 1.1 i ' •, 5.::-• , le, , \N„; ,.... ,, 1
,..i..,, , ,L,. A.,... r..7.,,.,,.0„, 4f.,...,,,,-i.,:r.,. .0.,:,.4:7:- .:4,..., or-7i • '' ''''',,,,N.-' ,.....
.".:,70,-..." ,4.=.'\., i .'4",4'1 .4.."114'•:',"Ilmtak,,'It'
. _Y Qi...i.! +
Al •. 1f 1,„,�.• •,, ;"lw,J Y J4} `�r'cSi.. .^x,f, G^' Air
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�" = _YI"•• 1�' ,` eft- y, • Y i=M _ ^ASS
� i
k ..co�"�.
� 1�1r
fib N.
' S-12 View of dispositioned seep location facing north.
Page 13 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SE . ) SW
120 150 1 .i 210 240
I • I • I • I • I • I • I • I • I • I • I • I • I • I • 1
0180°S (T) U 35°13.055'N, 81°45.116'W ±32ft At668ft
�, '
i f� 3 ,4 �, / t .y '
, �r r .1 �"
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die ` . - '
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..,. ,,. w,..-1-7., --relp , v,,'i , ' "Ite
' , r •• �' tt , 30 Mar 202 17:54:55
'' 5-12 View of disf o,itioncLI ,L•c•l, location facing south.
Page 14 of 55
L

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
\JW N NE E
330 0 :. 30 60 90
• I • I • I • I • I • I • I • I • I • I • I • . II • I
® 23°NE (T) ES 35°13.107'N, 81°45.300'W ±16ft ♦ 676ft
_ 7
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r '" „..'.,.
h
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1+ T`"" �"`� •!k a t+ ,
,� " :"' 'k '° i t �� '"SIR +�Ea« <
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fit' i._` 9t g
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I
/ " ,*+, i��
S 30 Mar 202012:01:40
•
.-13 View of dispositioned seep location facing north-northeast.
Page 15 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
W NW N
270 111111111P. 300 ,;U
I • I • I • 1 • i • I • I • I • I • I • I • I • •
® 327°NW (T) (0, 35°12.867'N, 81°45.343'W ±32ft A 741ft
. t -ir .
Ile 1+ V' ( ,a'. 10
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30 Mar 2020, 17:23:38
.0
S-14 View of seep location facing northwest.
Page 16 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SW W I NW
240 270 300 330
• 1 . I . I . I . I . I . I . I. I • I . 1 • 1 • I • I
® 284°W (T) OO 35°12.858'N, 81°45.362'W ±16ft ♦ 745ft
,
.11$1).'
� . -) S-15
l
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SI
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. .
,ems -/ ,F
i
• 30M �r 1020. 17:20.36
-15 View of seep location facing west.
Page 17 of 55

2020 Final Seep Report ort May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
w W NW N
240 270 . 300 330 0
0 292°W (T) v 35°12.858'N, 81°45.364'W ±16ft ♦ 726ft
1."`. a! n E
-
yp y 1
y���yyy [
•
('Jr s
40
S-15 View of seep location facing west-northwe ;
Page 18 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
W NW N
240 270 1500 330 0
I • I • I • I • I • I • I • I • I • I • I • I • I • I .
0 297°NW (T) • 35°12.847'N, 81°45.363'W ±16ft ♦ 748ft
1,1
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r
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S-16 �
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'I•-.J,. 9 �.R, i j 'tit/: .. +.
y -�' , , > 30 Mar 20207:18:32�
S-16 View of seep location facing west-northwest.
Page 19 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas, LLC SynTerra
SW W NW
240 270 I 300 330
I • I • I • I . I • I • 1 • I • I • I • I • I • I • I • I
0 290°W (T) • 35°12.849'N, 81°45.368'W ±16ft ♦ 735ft
�i i
•
•
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444,
it' •••` i:44. . ..,.it, - s,,,,,,.
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'.•‘4,•••°:, .4.." ii.X... i , 't Ilititt''' ; lio.;*4.
ii
6
4 `'tea
s
h
4ii
-16 View of seep locatit,n i.4cing west-northwest.
Page 20 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SW W NW N
2�U 24U 2� 330 0
I I I i I I 'ill i I i I 1 I •
i I I 1 . I • 1 •
0.
294°NW (T) 35°13.033'N,$1°46.156'W ±32ft ♦ 643ft
��J' ` ;: err,,.
Xt
rillt
., Yes ac '';w.
x g a
S-17 View of dispositioned seep location facing west-northwest.
SE S SW W
12,3 150 180 10 2 0 270 '02
• I • I I I • I • i I I I I I • 1 • 1 • 1 • 1 • 1 • I
®207°SW(T) O 315°131.041'N,I $1°46.I 159'W±16ft A 692ft
<a y.*
Y 4. '• `b►..
�. yr
•
�. . 3tt 2020. 09.59:15
S-17 View of dispositioned seep location facing south-southwest.
Page 21 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
W NW i N N
270 300 330 i a 30
0 335°NW (T) O 35°12.989'N, 81°46.102'W ±16ft ♦ 664ft
.y
t
i
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,.• , .,!
y}ii`t „r �� .' t i
`
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�
;
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i:• t
k ., `
. 30 Mar 2020, 14:03:06
_ • -
-18 View of seep location facing north-northwest.
Page 22 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
-W NW N N
270 300 l� 30
336°NW (T) • 35°12.986'N, 81°46.119'W ±16ft 672ft
tJ " ., ,t, . ♦ri 1
' ( \--- .
s r t s; ;.�.
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t`s• �j * ,1\ Ai, , -q. --corK, ..,. 1,4„ ,-,- r`.
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s 4
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r _ s.� e A Y ` rpfaa sW 4 o f tw.,,f .- r,..1-
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Fes_ Jt.i i i!' 4 '!' 'iQ"^� 'b� :k
S-19 View of seep location facing north r t,rthwest.
Page 23 of 55
I -

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
II NW N NE •
300 330 0 30
• I '• I • I • I • I • I . 1 . I I l • I • I • l • ,}.
0 342°N (T) ,• 35°12.989'N, 81°46.143'W ±16ft ♦ 686ft
, ,
i -;-1. ' "'+a ,..e.`y, ." , "fir$' -r y 't:! +„ 4,,.: .'•',4 �'• +
i, tk t?. ; ,' 1,
1
' A.3 1.4' 77'' 7' „''. : -1:.::14!>,,..:::"---" .'.,;::: ':-......-1:: :"..:;•;;7-:..,,,..„„' '1,i'''''-if.,;,'';0 •;:-.'''''',-,1 1- ...;,
isl a Tt I , '"a i T %'1/4 i•v
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r
\ i!.^ ,
..a ,�" `� / 30 Mar 2020. 141;10:36
S-19A View of seep location facing north-northwest.
Page 24 of 55

,
2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
S SW W
150 180 210 240 270
® 215°SW (T) OO 35°12.963'N, 81°45.913'W ±16ft A 715ft
K 4++, s... r-G
t
XrTi ..n, r. r.. �
., �— - .�mow,
a
1�. tea.`k ., ' *0` - ,Y'.,1+ir kww..`�`"
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� � �,, , , .w, ,. .i.A.
"fit
,�! t� f y f a
' 41r rf '''' - 020 Y15 2• 7 07
No,
S-20 View of dispositioned seep location facing southwest.
Page 25 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SW W NW N
210 240 270 300 330 0
0 295°NW (T) OO 35°12.8781N,81°45.356'W±16ft ♦ 706ft
4 +:v
sil.A' ds 1M' d .*•*
,'1 .", ':, '" ,xr"!-*" '" *•*••:- *,. it
" . ..i.All ,trrptr#:,.4., ......40,:, . 1-
A.OW.
S-21 4 , m ' .
A . J 5 -
` y a x.fi
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+� '?.
ter'. ^"'Y '‘,......*.N.
S-21 View of seep location facing west-northwest.
NE E SE S
30 120 750 l&6
®97°E (T) O 35°13.072'N,81°44.898'W±16ft A 668ft
,,$
s• � ��
,ems ' .._
„. .x1
" S tv.,,,,
def
30 Mar 2020, 18.42:22
S-22 View of dispositioned seep location facing east.
Page 26 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
E •
SE S Sw,
90 120 150 �.t: 2'i� 240
I • I • I i I • I • I • I • 1 • 1 • 1 • 1 • I • I • I • I I • i • I
®173°S(T) O 35°13.082'N,81°45.031'W±16ft A 651ft
.`
s•.� ' ,
-
t .,Y .. :<
adw ` .,1 p pC �.
,, ,4v
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ii
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s m, .w.a'- rs,. ... .,s
�/ •r r�l�`T n • f ���'`< •� - -�� )dam t, j e
i \
4
3O Vlar Via 1, si
S-23 View of seep location facing south.
Page 27 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
W NW N N:
270 300 330 0 30
I . I • I • I • I • I I • I I • i I I I I .
® 337°NW (T) O 35°13.071'N, 81°45.021'W ±32ft ♦ 658ft
_; • - _(
„,. ,. i i 4, ,,,'"*-4k - 4 40 -,..,.',
''
1 ' ' 4.1' " ,4 s.- -
'` , -* ,mow.•'"' r
`. ` . t ert�y b, r# . 5 S
1140
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...h.",.ir e 7 ,� �:dv� � C d+ ��
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.,„ ' :14.r, >f ' 1:4,4640, .0 „ .-.-,:io/ •. '.4'1.._ , 1,4,• ,:-. .
• "fit,
r.., .a w.t.. ^k , w M, i t.-T yi+fl ',1, y` e ',
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- � - ,r,w .c .1 ', 1� .
,. , ,- • 4, * ' *-..':30 Mar 2020. 18.04 49
S-23 View to •,. a,i, 1,=, ition facing north-northwest.
Page 28 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
S sv W
oO 210 240 270 3(
I • I • I • 1 • I • 1 • 1 I I • I • I • I I • I
•
® 229°SW (T) 0 35°13.088'N, 81°44.976'W ±98ft ♦ 663ft
\e\\ f �,2. cj�j�yj ,, s�,.r •,, r :, �a � - .tip
.h
E _� ..y:: A" ..1": ,i.. , 7_r ��
ti ' if '
i"a x� l w' \¢ f�t
)tik✓= �30 Mar 20 },11$:08:d8 4"
E, :,, L. t 5•i.e'. �i.'+. f Spy~ A. ♦4'S.
♦-24 View of dispositioned seep location facing southwest.
Page 29 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
S c1 W
1` 24U 270
I • I • i • i • I • I • I • ( . I • I • i ! I • I •
0 218°SW (T) (035°13.108'N, 81°44.975`W ±98ft ♦ 669ft
.• •— ti+ y �M F 9., . ,l ally +•nt'..' ' ,a tr' w
i Ott.` ,., •
00,
04r
' ' . I-. - , - , - , ,14,4„...,,,,,,,,,..:,,,c,„„, i,ss.t.,4.144,,,,,,r4 „1,..4....t.
i I ,, ir' `'
;1 • Vic ',:,g
,
A
too,
S-24 View of dispositioned seep location facing southwest.
Page 30 of 55

2020 Final SeepReport
p May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
N NE E
330 30 . 60 90
• I • I • I I • I • I • I • I • I • I • I • I • I • I
® 34°NE (T) CD 35°13.057'N, 81°45.137'W ±32ft ♦ 690ft
Il •.*. .. • fJ li R f I �i
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S-25 iew of dispositioned seep location facing northeast.
Page 31 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
J1i
330 0
N NE 90
30 60 90
1 . 1 . 1 . 1 . 1 . 1 . 1 . I . 1 . I . 1 * I . 1 • I .
0 27°NE (T) 35°13.057'N, 81°45132'W t16ft ♦ 693ft
H44 V ,1 °1416;? 4: ---i.:i.S '' ..44,
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ir
4 "�3 Mar 2020 18:24:28
-25 View of dispositioned seep location facing north-northeast.
Page 32 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW ; I NE
b, 60
l • l • I • i • I • I • i • i • I • i • I • 1 • 1 • 1 • 1
t 360°N (T) • 35°13.061'N, 81°45.228'W ±16ft ♦ 690ft
4 .vywa *.„. {^R IB" ; �`y� is w q4 A 1�' �,4
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4
i
a- r .•.fi 411f f ^ �J .liAC, .
30 Mar 2020. 12:23:32
-26 View of dispositioned seep location facing north.
Page 33 of 55
L

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SE S W
120 lb0 180 210
. 1 . 1 . 1 •
1 . I .
0166°S (T) C. 35°13.055'N, 81°45.228'W ±16ft ♦ 680ft
qr
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1 •
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le A
•
' '30 Mar 2020' •12:24:12
S-26 View of dispositioned seep location facing smith
Page34 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
IN NW N
40 270 300 330 0
I • I • I • I • I • 1 • I • 1 • 1 • 1 • 1 • 1 • I • I • I
0 310°NW (T) 35°12.835'N, 81°45.384'W �-32ft A 710ft
n. �.
a
a
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• ;.,, "ram
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30 Mar 2020, 17:15:33
S-27 View of seep location facing northwest.
Page 35 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
S SW W N
1dG 270 300
0 246°SW (T) • 35°12.698'N, 81°45.244'W ±16ft ♦ 770ft
1 eF
si �rl�!"f',
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r
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1 7
30 M020;'17;,04:40,
S-28 View of seep location facing west-southwest.
Page 36 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW N NE
330 0 6u
I • I • I • I • I • I • I • I I I i • i I I •
018°N (T) • 35°12.698'N, 81°45.247'W ±16ft ♦ 759ft
r d>
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..
E Xl.s - ' ar 2020,'17:04.59
'3 +s . 1 C
S-28 View of seep location facing north.
Page 37 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SW W NW
0 240 270 330
• I • I • I • I • I • I • I • I • I • I • I • I • I • I
0. 282°W (T) • 35°12.693'N, 81°45.24gq0'W ±16ft ♦ 750ft.� L
1- ‘dt.,:'''. .' ''- qi
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' `° 30 Mar p020, 17'01I "gt ;..- \Ls',°. 14,4 Akcsk.,‘„I'Nli.) ‘ -
.flt
S-29 View of seep location facing west.
Page 38 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW N NE
,0 300 3.30 a 30
• 1 I I • 1 • 1 • I • I • 1 • 1 1 • 1
0 341°N (T) • 35°12.694'N, 81°45.2W41' ±16, ♦ft, 743ft
. .....,-.., ,,,,,,r, ,... ,,,z. 54_ ,
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1a ,
S-29 View of seep location facing north-northwest.
Page 39 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SW W NW
210 230 : '0 300 330
• 1 • I • I • I • I • 1 I • I • I I I • I I • I
® 262°W (T) `410 35°12.691'N, 81°45.249'W ±16ft 815ft
I
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. ' , r-'' -.,,,w,„(77,,,,,, -0/,- , iill . 16 .4/ ,.,- ,.., : .
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• 169:43
S-30 View of seep location facing west.
Page 40 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NW N NE E
33o n I,) 60 90 120
I • I • I • I • I • I I •
I •
I i - i I { • i . t i • t • I I
0 40°NE(T) a_ 35°12.690'N,81°45.244'W±16ft ♦761ft .
.*, -A ir 4,' *?' ' I'
MX ,
F
S-30 View of seep location facing northeast.
Page 41 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
E sE S
60 90 120 150 180
I • I • I • I • I • I • I • I • I • I • I • I • I • I •
,.. „,,„ , „. , ;,4,4:74, ,..: . ';,;', -,,, it2 azA- , dir:,..: ''
0129°SE (T) C. 35°12.684'N, 81°45.231'W ±32ft ♦ 761ft
At
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'' rIVC-r 30 Mar 2020, 16.56:38 '
S-31 View of seep location facing southeast.
Page 42 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
E E S
GU 11 150 180
I • 1 • I • 1 • I • 1 • I • 1 • ; • 1 • ; • • I • I •
- , ...,,.. -......., .....„„ . s.,,,,., ...,, ,0. ',.•,.•.,,,,If,.. 104 r''''''''''r. ,,,-....,44...,,,,,,i, ..,,..,,%,-....
0 128°SE (T) Q 35°12.677'N, 81°45.212'W ±16ft • 784ft
i - Sn A yr ➢•
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S-32 View of seep location facing southeast.
Page 43 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NE ; E SE
'o 60
75°E (T) 35°12,675`N 81°45.212'W ±16ft 779ft
"ti z r
Nitb: .• - , AIR— r-4",./5,4,,,,, , • - , .;
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S-32 View of seep location facing east.
Page 44 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
' NE E SE
su 60 120 150
I • I • I • I • I • 1 • I • I • I • I • I • I • I • I •
0 87°E (T) Q 35°13.096'N, 81°45.287'W ±16ft A 664ft
.,►.
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4, ,.`<?_ A
S-33 View of dispositioned seep locati ,?. 1 Icing east.
Page 45 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas, LLC SynTerra
E SE S
90 120 • 150 180 210
• I • I • I • I • 1 • I • I • ;I • I • I • I • I • I • I
0143°SE (T) t 35°13.061'N, 81°45.222'W ±16ft A 685ft
, , A 4ieve../.
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_ * 4,"
i. S
,N r: , +' , 1 • ."k 30 Mar 2020, 1 2 •r� „
�.
-34 View of dispositioned seep location facing southeast.
Page 46 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
N NE i E SE
1 60 i 90 120 150
0 78°E (T) , 35°12.482'N,81°45.378'W ±32ft ♦ 870ft
4
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S-35 View of dispositioned seep location facing east.
Page 47 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NE E SE
40 LU 90 12U
l . I • I • l • l • I • _ I • 1 • I . l • j • I • I • l •
.;:. 99°E (T) • 35°12.620'N, 81°45.233'W ±32ft A 765ft
'11M1k,A.. A 4,1 ,,-,4, 1 , _
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I' i , i ' .30 4 '0.4.+ 16:23:34
S-36 View of seep location facing east.
Page 48 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
E SE S
90 120 'J0 180 210
1 • I • I • I • I • I • 1 • 1 • I • I • 1 • I • I • •1 •
0147°SE (T) O 35°12.619'N, 81°45.233'W ±16ft ♦ 801ft
1 r ery*,n;
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S-36 View of seep location facing southeast.
Page 49 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SE S SW y
120 150 . 180 210 240
. I • I • I • I • I • I l
•
0172°S (T) O 35°12.612'N, 81°45.222'W ±32ft ♦ 744ft
rig+'', ,.y. +ery , # �\ _ 4 _ t
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44
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't':, `- 6 1 , . Le*",. ` :ate . , U*» '
• ` ,' , :• 1. 30 Mar 2020 16.25:03
S-37 View of seep location facing south.
Page 50 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
SW N NW
.'10 240 7 u 300 330
267°W (T) 35°13.061'N, 81°45.169'W ±32ft A 661ft
'+ t ,,.,. . - �..
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30 Mar 2020, 18:29:28
S-38 View of seep location facing west.
Page 51 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
18r 210 240 270
I . I • I • I • I • I • I • I • i • I • I • 1 • I • l •
0 227°SW (T) CO) 35°12.804'N, 81°46.431'W ±16ft ♦ 764ft
:. �e \ te,: e
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S-39 View of seep location facing southwest.
Page 52 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NE E SE
60 90 120 150
• I • I • I
• I • I • I • I _ • I • I • I • I • I • I • I
0 103°E (T) • 35°12.813'N, 81°46.434'W t32ft ♦ 746ft
b Syr R f 1T`.t>/'� "y.�„-. 'j/. 9 ry/,�
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..•• -r 2020. 14:87:52
S-39 View of seep location facing east.
Page 53 of 55

2020 Final Seep Report May 2020
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
N NE E
0 30 } 60 90 120
. 1 . I . 1 . 1 . 1 I 1 1 • I • I • I
® 53°NE (9T) 35°12.812'N, 81°46.439'W ±16ft •s766ft
- ' fa r° ,Y.�, '4 ".-i . .1R6 i, , min r 4y. �,
y� .ey o� a y * • . am,,�y .,;., -`"- . ,�7�!t.1t
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i.—39 View of seep location facing northeast.
Page 54 of 55
L

May 2020
2020 Final Seep Report
Rogers Energy Complex-Cliffside Steam Station-Duke Energy Carolinas,LLC SynTerra
NE E SE
30 60 90 120 150
I i I I I I • I • I • I I • i • I • I • I .
0 99°E (T) • 35° ,
12.801'N 81°46.434'W ±16ft ♦ 755ft
, • ya� 4, . 47
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-39 View of seep location facing east.
Page 55 of 55