NC0000396_SOC WQ S17-010_20200424

1
d' DUKE RECEIVED James Wells
Vice President
ENERGY. Environmental,Health and Safety
Programs&Environmental Sciences
MAY 0 1 2020 526 South Church Street
Charlotte,NC 28202
[phone]
NCDEQIDWRINPDES
April 24, 2020
Via Overnight Mail
S. Daniel Smith
Director of Water Resources
North Carolina Department of Environmental Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Bob Sledge
North Carolina Department of Environmental Quality
Water Quality Permitting Program
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Report Under Special Order by Consent — EMC SOC WQ S 17-010
Duke Energy Progress, LLC — Asheville Steam Electric Plant
NPDES Permit NC0000396
Interim Seep Report
Dear Messrs. Smith and Sledge:
On behalf of Duke Energy Progress, LLC (DEP), I am submitting to you the Asheville Steam
Electric Plant Interim Seep Report summarizing the findings of the comprehensive survey
completed in early 2020 as required by the Asheville Steam Electric Plant NPDES Permit
NC0000396 Special Order by Consent (SOC), SOC No. S 17-010 Section 2.b.1).
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.

Messrs. Smith and Sledge
g
April 24, 2020
Page 2
Please direct any questions concerning the Asheville Steam Electric Plant NPDES Permit
NC0000396 SOC No. S 17-010 to Robert Wylie at [phone] and to Chris Hallman at (980)
373-7892 relative to the Interim Seep Report.
Sincerely,
CIO/1;FJameells
Vice sident, Environment, Health & Safety-
Programs and Environmental Sciences
Duke Energy
Attachment:
Asheville Steam Electric Plant Interim Seep Report
cc: Richard Baker, Duke Energy
Robert Wylie, Duke Energy
Chris Hallman, Duke Energy
Teresa Williams, Duke Energy
Tina Woodward, Duke Energy
Paul Draovitch, Duke Energy
Matt Hanchey, Duke Energy

t .
synTerra
2020 INTERIM SEEP REPORT
ASHEVILLE STEAM ELECTRIC PLANT
EMC SOC WQ S17-010
46 DUKE ENERGY LANE
ARDEN, NC 28704
APRIL 2020
PREPARED FOR
f•� DUKE
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DUKE ENERGY PROGRESS, LLC
Grant Barrier
Pro' ct Manager
Todd ating, LG 2410
Project Manager

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke EnergyProgress,LLC
SynTerra
TABLE OF CONTENTS
SECTION PAGE
1.0 INTRODUCTION 1-1
1.1 Inspection Details 1-1
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 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
LIST OF ACRONYMS
EMC Environmental Management Commission
NPDES National Pollution Discharged Elimination System
SOC Special Order by Consent
Page ii

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
1.0 INTRODUCTION
Coal fired generation of power ceased at the Asheville Steam Electric Plant(Asheville or
Site) in January 2020. On March 30, 2020, Todd Plating (NC L.G. #2410) of SynTerra
inspected the 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) WQ #517-010. That SOC describes
inspection requirements after termination of coal fired power generation at the Site as
follows:
Within ninety days after the Asheville coal fired generation ceases, and no later than
April 30, 2020, Duke Energy shall conduct a comprehensive survey of areas
downgradient of the 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 ("Interim Seep Report"), shall be
submitted to the Director of DWR no later than April 30, 2020. This Interim Seep
Report must list any seep that has been dispositioned (as described below)since the
Special Order became effective, including an analysis of the manner of disposition.
All locations listed in Table 1 of the SOC, with the exception of previously
dispositioned seep P-01, were observed and documented with photographs during the
inspection. P-01 was not accessible during the inspection due to new fencing and
highway projects in the area.
General observations include:
• No previously unidentified seeps were observed during the inspection.
• Ongoing dewatering of the 1964 ash basin has produced several notable changes
to seep status during this inspection.
1.1 Inspection Details
The weather was clear before and during the inspection. Temperature was
approximately 60 degrees Fahrenheit(F). Prior to the inspection, the most recent rainfall
event occurred on March 25, 2020. A total of 1.37 inches was recorded at the on-Site
weather station. No rainfall was recorded on the day of the inspection or in the four
days before the inspection.
Page 1-1

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
The inspector reviewed previous seep inspection reports. Observations from previous
inspection reports were consistent with observations made during the March 2020 SOC
inspection.
The inspection included observations in the following areas (Figure 1):
• Along the toe of the 1964 ash basin dam
• Along the toe of the former 1982 ash basin dam
• Along the divider dike between the two ash basins
• Areas along and downgradient of the 1964 ash basin and former 1982 ash basin
• In the French Broad River floodplain
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 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
2.0 FINDINGS
2.1 General Observations
Inspection observations of each seep are shown in Table 1. Details include:
• No new seeps were observed during the inspection.
• No previously unidentified or unreported pipes were observed during
inspection.
• A 90-degree V-notch weir was installed at the headwall of the 1964 basin seep
collection system for 64E0-01 and 64E0-02; therefore, this flow is no longer
being contained and pumped back to the 1964 basin. Flow now discharges out
NPDES permitted Outfall 101. Flow above the lowest point of the weir (Outfall
101) was recorded at 0.20 feet (approximately 21 gallons per minute) at time of
inspection.
• Flow was observed emanating from the base of the stormwater dissipation
structure north of the former 1982 ash basin weirs.
• No flow from the pipes within the weirs at the former 1982 ash basin was
observed. Flow from dissipation structures was at a sufficient volume to back up
into the weir boxes.
•
DD-Pipe was observed flowing overland into an adjacent parking lot storm
drain, which conveys water to the west stormwater basin. The discharge from
the west stormwater basin is ultimately monitored at F-01.
• The Interstate 26 (I-26) widening project is changing Site conditions adjacent to
M-01, A-01, A-02, and B-01.
• Most wet weather ditches appeared dry and were not holding water.
2.2 Effects of Decanting
Dewatering of the 1982 ash basin is complete. Seep K-02 was dispositioned because of
non-flowing conditions as a result of dewatering the former 1982 ash basin, as noted in
the SOC.
Page 2-1

2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
Dewatering of the 1964 ash basin is underway at a rate of approximately 240,000 gallons
per day. Ongoing dewatering of the 1964 ash basin has produced several notable
changes to seep status since the previous inspection:
• The saturated area around C-03 appeared to be reduced in size relative to
previous inspections, and the area of seepage has migrated approximately 15
feet downslope.
• C-05 was dry.
• 64E0-03 was dry.
2.3 Changes to Seep Status
Mr. Plating 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 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 C-05 and 64E0-03 were observed to be dry during the March 2020 inspection,
likely due to ongoing dewatering of the 1964 ash basin. If conditions persist, those seeps
could meet the requirements for dispositioning.
No other changes to seep status were observed during this inspection.
Page 2-2

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
3.0 REFERENCES
North Carolina Department of Environmental Quality. (2018). Special Order by Consent
EMC SOC WQ S17-010.
Page 3-1

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
FIGURES

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5----- -y • 3.THE STREAMS AND WETLANDS JURISDICTIONAL DETERMINATION WAS
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- #SAW-2014-00189.THESE WETLANDS AND STREAMS WERE APPROVED BY THE US
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TABLE 1
SEEP LOCATIONS AND DESCRIPTIONS - MARCH 2020 INSPECTION
2020 INTERIM SEEP REPORT
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
Location Coordinates Receiving Receiving
Facility Sample ID Waterbody Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection
Latitude Longitude Classification
Easternmost of two engineered drain pipes from 1964 Ash Basin.
Became permitted outfall during NPDES permit renewal. Combined NA - Monitoring
UT to French seep flow from 64E0-01, 64E0-02, and 64E0-03 is currently being Established per Water exits from a caged pipe. Flow was observed discharging from
Asheville 64E0-01 35.468319 -82.549104 B See C-01. containment system V-notch weir. Flow was measured at 0.2 feet
Broad River monitored by containment system with 90° V-notch weir. Discharge Terms of NPDES above lowest point of weir at time of inspection.
flows into UT, through culvert under I-26, into wetland area draining Permit
to C-01.
Westernmost of two engineered drain pipes from 1964 Ash Basin.
Became permitted outfall during NPDES permit renewal. Combined NA - Monitoring
UT to French seep flow from 64E0-01, 64E0-02, and 64E0-03 is currently being Established per Water exits from a caged pipe. Flow was observed discharging from
Asheville 64E0-02 35.468319 -82.549104 B See C-01. containment system V-notch weir. Flow was measured at 0.2 feet
Broad River monitored by containment system with 90° V-notch weir. Discharge Terms of NPDES
flows into UT, through culvert under I-26, into wetland area draining Permit above lowest point of weir at time of inspection.
to C-01.
Engineered drain from 1964 Ash Basin at black corrugated culvert.
Flow infiltrates downstream into 64E0-01 and 64E0-02 containment
NA - Monitoring
UT to French system. Became permitted outfall during NPDES permit renewal. Established per
Asheville 64E0-03 35.466943 -82.548502 B Combined seep flow from 64E0-01, 64E0-02, and 64E0-03 is See C-01. No flow. Corrugated pipe to convey flow was dry.
Broad River currently being monitored by containment system with 90° V-notch Terms of NPDES
weir. Discharge flows into UT, through culvert under I-26, into Permit
wetland area draining to C-01.
Wetlands drainingMonitoring at Drainage ditch for collection of seeps and runoff. Water runs under
pH 5-10 S.U.
Point of drainage to French Broad River from wetland/braided flow location A-01 prior the gravel road via culvert toward the French Broad River. Flow
Asheville A-01 35.471253 -82.552914 to French B west of I-26. Northernmost sample locations near river. to entering French Mercury 50 ng/L similar to previous inspections. Flow re-enters ground prior to
Broad River Broad River Selenium 10 pg/L discharge to French Broad River.
Wetlands draining Minor seep in wet area just upstream of A-01. Channeled flow drains Monitoring at Low area that is completely overgrown with vegetation. Saturated
Asheville A-02 35.471155 -82.552596 to French Broad B toward A-01 location. location A-01 See A-01 with visible iron staining, but no observable flow. Similar to previous
River inspections.
Wetlands draining Monitoring at Mercury 50 ng/L In a ditch that runs parallel to the gravel road, right before the water
Asheville B-01 35.468595 -82.551418 to French Broad B Point of drainage to French Broad River from wetland/braided flow location B O1 prior Chlorides 600 mg/L flows into a culvert that runs under the road toward the French Broad
River west of I 26. and south of A O1. to entering French TDS 2100 mg/L River. Flow less than previous inspections.
Broad River
Monitoring at This seep is located at the end of the gravel road in the floodplain
Molybdenum 300 mg/L
UT to French Point of drainage to French Broad River from wetland/braided flow location C-01 prior area, adjacent to the wooden footbridge. This area receives water
Asheville C-01 35.466042 -82.549701 Broad River B west of I-26 and south of B-01. to entering French TDS 1500 mg/L from D-01 and from a culvert that runs under I-26 from C-02. Flow
Nickel 50 pg/L
Broad River similar to previous inspections.
Located downstream of the concrete structure at the toe of the 1964
Monitoring location of UT below 1964 Ash Basin for effects of ash basin dike before entering a culvert under I-26. This location is
UT to French general area seepage; site is located just east of culvert under I-26. Monitoring at now receiving combined flow from 64E0-1, 2, &3 as per updated
Asheville C-02 35.466891 -82.548651 Broad River B Stream flow is conveyed into wetland area draining toward C-01 location C-01 See C O1 NPDES permit. Flow is more channelized with less algae. Wetlands
location. area very saturated and flowing into C-02. Wetlands area appears to
have greater volume of standing water than previous inspections.
Seepnear base of northwest side of 1964 Ash Basin. Anyflow NA - MonitoringSeepLocated at the northwest side of the 1964 ash basin between the
initially collected at gravel access road and the dike. Seepage noted in toe of slope
Asheville C 03 35.469383 -82.549293 UT to French drains to 64E0-3, the 1964 engineered outfall collection system. Established per engineered outfall and
B behind riprapapproximately 10 yards u slo a from sign. Seepage
Broad River This non-constructed seep flows to a portion of an NPDES Terms of NPDES pumped back into basin; pp y p p
contained in rip rap lined drainage and conveyed to 64E0-01 and
wastewater treatment system. Permit afterward, see C-01. 64E0-02. No change since previous inspection.
Page 1 of 3

TABLE 1
SEEP LOCATIONS AND DESCRIPTIONS - MARCH 2020 INSPECTION
2020 INTERIM SEEP REPORT
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
Location Coordinates Receiving Receiving
Facility Sample ID Waterbody Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection
Latitude Longitude Classification
AOW near base of northwest side of 1964 Ash Basin. Any flow drains NA - Monitoring Seep initially collected at Located on the north end of the downstream slope of the 1964 ash
UT to French to 64E0-3, the 1964 engineered outfall collection system. This non- Established per engineered outfall and basin dam, between C-03 and 64E0-3. Area near C-05 was dry.
Asheville C-05 35.46887 -82.54915 B
Broad River constructed seepflows to aportion of an NPDES wastewater Terms of NPDES pumped back into basin; Minimal water observed in drainage downslope of C-05 sign. Water
treatment system. Permit afterward, see C-01. within rip rap conveyance from C-03 location.
Wetlands draining Located at the end of the gravel road in the floodplain area, near the
Seep to established channel within wetlands west of I-26. Monitoring at wooden footbridge. This stream is in a deeply incised ditch and is a
Asheville D-01 35.465061 -8254944 to French B Channel flows to C-01 location. location C-01 See C O1 tributary to the channel that contains C-01. Substantial iron staining
Broad River
visible.
Wetlands drainingPoint of drainage to French Broad Monitoring at Located in the floodplain area, about 350 feet down the path south of
g pH 5-10 S.U.
Asheville E-01 35.465061 -82.54944 to French B River from wetland/braided flow west location E O1 prior Nickel 60 pg/L the footbridge and about 40 feet from the French Broad River.
to entering French Channelized flow through low lying area. No standing water
Broad River of I-26 and south of C-01 drainage. TDS 600 mg/L
Broad River observed.
Monitoring at pH 5 10 S.U.
Wetlands draining Point of drainage to French Broad location F O1 prior Copper 15 pg/L Located in the floodplain area, about 950 feet south of the footbridge
Asheville F-01 35.463581 -82.54854 to French B River from wetland/braided flow west Mercury 50 ng/L and about 40 feet from the French Broad River. Flow similar to
Broad River of I-26 and south of E-01 drainage. to entering French Nickel 100 pg/L previous inspections.
Broad River TDS 1000 mg/L
Located in the floodplain area, about 1400 feet south of the
Wetlands draining Point of drainage to French Broad Monitoring at footbridge near the right-of-way that crosses the floodplain area. An
Asheville F-02 35.462533 -82.547499 to French B River from wetland/braided flow west location F-02 pH 5-10 S.U. area of ponded water("impounded wetland") drains into a channel
Broad River of I-26 and south of F-01 drainage. near the AOW sign and flows through the right-of-way toward the
French Broad River. Minimal flow noted exiting the ponded area.
Wetlands draining Monitoring location within wetland area west of I-26, at outlet of Monitoring at Located about 200 feet northeast of F-02. Flow spreads into wetlands
Asheville F-03 35.463114 -82.547177 to French B culvert under I-26. May be remnant beaver pond. Flows toward F-01 location F O1 See F-01 area immediately downgradient from culvert. Flow similar to previous
Broad River location, then to French Broad River. inspections.
UT to wetlands Monitoring location of UT below the 1982 Ash Basin dam,just east Located in the ditch adjacent to I 26, east side, and downgradient of
Asheville K-01 35.463051 -82.545751 drainage to B of culvert under I 26, conveying flow to wetlands west of I 26. Monitoring at See F-01 AOW 82E0-1 &2. Flow is clear with similar volume to previous
French Broad Flows drain through wetlands past locations location F-01
River F-03 and F-01 before entering French Broad River. inspections.
Wetlands draining Seep emerging southeast of 1982 basin dam. Any flow would drain NA Seep
Asheville K-02** 35.463581 -82.544577 to French B through wetlands to sampling location F-01 before entering French Dispositioned NA - Seep Dispositioned Evidence of former flow and/or runoff flow. Area is completely dry.
Broad River Broad River.
Located in the ditch adjacent to I-26, east side, about 500 feet
Wetlands draining Monitoring location for coalescence of seep flows prior to entering farther northwest on I-26. Construction along I-26 directly adjacent
Asheville M-01 35.464266 -82.546712 to French B culvert under I-26. Flow drains throw h wetlands to lin Monitoring at
sam See F-01 to M-01. Ditch to south appears
9 p 9 location F-01 to have been excavated. Check
Broad River location F-01 before entering French Broad River. dams and other BMPs installed north along I-26 adjacent to M-U1.
Flow appears similar to previous inspections.
UT to Powell Monitoring of UT Cadmium 5 pg/L Located in the low area in the woods east of the gravel road that
Asheville N-01 35.474088 -82.551532 C Seep to small channel upstream of its confluence with Powell Creek. prior to confluence leads to Powell Creek and SD-01. Monitoring of UT prior to confluence
Creek with Powell Creek Mercury 50 ng/L with Powell Creek. No changes since previous inspection.
Monitoring site of small drainage channel south of 1982 ash basin
UT to the French NA - Seep Natural stream cut with sandy and cobble substrate. Could not access
Asheville P-01 35.46185 -82.544625 Broad River B prior to entering culvert beneath I- 26. Dis ositioned NA - Seep Dispositioned p_O1 during inspection due to new fencing and highway projects.
Page 2 of 3

TABLE 1
SEEP LOCATIONS AND DESCRIPTIONS - MARCH 2020 INSPECTION
2020 INTERIM SEEP REPORT
ASHEVILLE STEAM ELECTRIC PLANT
DUKE ENERGY PROGRESS, LLC, ARDEN, NC
Location Coordinates Receiving Receiving
Facility Sample ID _ Waterbody Waterbody Description SOC Monitoring Interim Action Levels Notes from Inspection
Latitude Longitude Classification
Wetlands draining Monitoring at Located in the floodplain area, between B-01 and A-01, on the west
Asheville Ponded Water F 35.467232 -82.550521 to French B Ponded water near dry channel between locations B-01 and C-01 locations B-01 and See B-01 and C-01 side of the gravel road. Monitoring at locations B O1 and C-01. Water
Broad River C 01 present in depression similar to previous inspections.
I-26 road construction upstream with substantial clearing noted.
HDPE pipe that outfalls onto riprap and drains to Powell Creek. Flow
* Storm Drain location at north end of site near Powell Creek. From NA - Seep present from corrugated pipe, similar to previous inspections. New
Asheville SD O1 35.474121 -82.552079 Powell Creek C sampling- No CCR impacts. Dispositioned NA Seep Dispositioned stormwater BMPs installed upslope since last inspection, near
laydown area.
UT to wetlands Located in a concrete box outfall structure at the toe of the 1982 ash
Western drain (Drain 1) from 1982 ash basin. Basin has been
Asheville 82E0-01 35.464058 -82.544848 drainage to g excavated and repurposed. Any flow would drain to K-01 and F-01 Monitoring at See F-01 basin dike. No flow observed from the pipe. Flow observed emanating
French Broad locations. location F-01 from the base of the stormwater dissipation structure north of the
River 1982 ash basin weirs.
UT to wetlands Located in a concrete box outfall structure at the toe of the 1982 ash
Eastern drain (Drain 2) from 1982 ash basin; east weir. Basin has
Asheville 82E0-02 35.464058 -82.544848 drainage to g been excavated and repurposed. Any flow would drain to K-01 and Monitoring at See F-01 basin dike. No flow observed from the pipe. Flow observed emanating
French Broad F O1 locations. location F-01 from the base of the stormwater dissipation structure north of the
River 1982 ash basin weirs.
UT to wetlands French drain below divider dike between '64 and past '82 basin. Water flows from 4" PVC pipe located at divider dike. Toe of slope
Asheville DD-Pipe 35.466724 -82.544403 drainage to B Flow is into former 1982 basin footprint which was recently removed Monitoring at See F-01 saturated with standing water. Seepage drains into parking lot and
French Broad from the NPDES permit. Flow would drain toward M-01 location and location F-01
stormwater drain just east of seep location.
River then to sample point at F-01.
Prepared by:GAB Checked by:TDP
Notes:
*-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. Monitoring shall be conducted at the approximate locations indicated on the attached site map.
UT-Unnamed Tributary
pg/L-micrograms per liter
2B-15A NCAC 02L.0202 Standard
CCR-Coal Combustion Residuals
mg/L-milligrams per liter
NA-Not Applicable
ng/L-nanograms per liter
NPDES-National Pollutant Discharge Elimination System
S.U.-Standard Units
SOC-Special Order by Consent
TD5-Total Dissolved Solids
Page 3 of 3

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
APPENDIX A
PHOTOGRAPHS

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
0 46°NE(T) *35°28'1"N,82°32'54"W±16.4ft •2054ft
•
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/a.4' /'�• A,� AshevN 2020 SOC
30 Mar? .11:2 '
64E0-01 View of the NPDES permitted seep location(facing
northeast) looking down.
0 56°NE(T) • 35°28'1"N,82°32'54"W t16.4ft ♦2054ft
•
•1 •jy)� ';, ram* ."
w*Y ^ y• At",
'°l r ,�'l'...0
i•
•
`�
fi4-F02 Asheville 2020 SOC
7-itemark-See Settings ,• - 30 Mar 2020,11:31:15
64E0-02 View of the NPDES permitted seep location(facing
northeast) looking down.
Page 1 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
O 214°SW(Tl ®35°28'6"N,82°32'56"W s16)y.4ft •2088ft
�,' •`,. . .I, -1 '- s$ `-ev,if
- ..
r o �1[' N •
r
f
' of.: W '+ -:•n
..,,- •Ors.
r ..4 f •
•
,F 4 -.t....,
64E0-03 View of NPDES permitted seep location facing southwest. I
• -98.4ft •2124ft
-y 1 pv
ifri
t izer: d
A.,.y
}
t, 1
i*.1.rr►Via. .+ . :' ' , a
1 .+Mil . ". f i i'2► '. l
of +.SO'," 'Itr ,.hook 1"_'' sr. t o
•
M
-'.
„ t. .
R ,
+w a. 1.9M .s_
1-01 \ iew of SOC sample location facing east.
Page 2 of 13

l
• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
0101°E(T) i 35°28'16"N,82°33'9'W*16.4ft ♦2036ft
t
y �. ..
+r 'I_ ram` rY."tr, 14'
t*Itt.
4,1
,A'
p ?v
IA If s'' }i p F .
w.
T y .y�„. /x1 a,; r. ' , 'v sir
1
A-02 View of seep location facing east.
o! • . - , . ,, -,, 1'r . i. -
Fso
y 4
3
a 3
i
r•'11
F F' 'q, 1 Y lip...\ •f J
iiA.
#
a 14 i'# f ^ I. L " el
y = #‘4 •- tadI.
, ,s ;4" 48`07
B-01 View of SOC sample location facing northeast.
Page 3 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
O 165°S(T) ®35°27'57"N,82°32'58"W±16 4ft •2005ft
« , •
z° rt�
-c4".4 = • d., 4.." • 1r+ a
•
4.it.r
d mot.
y t
1H
_- RJt 6.+t.�Jl.. Si1et r
C-01 View of SOC sample location facing south.
176°S(T) ®35°28'0"N,82°32'54"W±16.4ft •2102ft
rx' f 17,1( Y
v.• r.ri ,,7, .- 4 •
40111
1 - s, 4 .,
t c.
a��. *If
('-02 View of seep location fat i ng south.
Page 4 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
0 29°NE(T) • 35°28'9"N,82°32'57"W±16.4ft ♦2119ft
4 y
4w.,rt• ..M
fi
•.s _ �4... ..i ,.. •ttryy;
T `^
t ` .
r 41'� `'.�, Yr-
i
C-03 View of NPDES permitted seep location facing northeast.
a _ —
0 66°NE(T) • 35°28'7'N,82'32'56"W±±1+6.4ft ♦2116ft
t rii .t .��y. s ,c
}
w . •olt
JF'✓ ~ti
J.-w. .v 'r Y1 ' • • .
1.ti.y..y3er,f. ��`j4Lot , t
till4V
C-05 View of NPDES hrrmitted seep location facing northeast.
Page 5 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
O 23°NE(T) •35°27'57"N ,2°32'58"W±16.4ft ♦2037ft
•
' M
1
D-01 View of seep location facing northeast.
0134°SE(T) :!:35°27'54"N,82°32'57"W t16.4ft ♦2027ft
rF
. e, f{
4
: -
•
.fit~:c
P eu
-)40". '
rrar>k+l
I,-01 vi(,wv" of SOC sample location facing southeast
Page 6 of 13

r
• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
®252°W(T) +• 35°27'48"N,82°32.54"W±32.8ft •2027ft
1 fj' `r a R'.
yF /\} } <
ti
''" ; .1 .\
F Asheville 2020 50{.'
i.iur, atermark-See Settings 30 Mar 2020,15.12:1
F-01 View of SOC sample location, facing west.SOC sign in
background.
103°E(T) *35°27'45"N,82°32'51"W±16.4ft •2004ft
,1 r f %'r
( 0 ':',.. .44".- Ai,:',' Lt. 'r.." 1 >:4f 4';
I ,.,:,,'.4r it, '4".• •-•• t4-. — , - .—-4-.-'1
is;r >
i. -II;a is• '..
u
i
,d ♦aem' � 141r' ) ,, �' •i -
` � ygip a
y ': '-4
in \
j� Ai Q�*' i
-?.,4 :im
ram. -7 1 ' ,
[--02 View of SOC sample location facing east.
elEaL
Page 7 of 13

2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress, LLC SynTerra
019°N(T) ,• 35°27'46"N,82°32'48"W±16.4ft ♦2039ft
Y *i
14
N.,
A.
1 r Asheville 2020 SOC
30 Mar 2020.15.28.06
F-03 View of seep location facing north.
0.,-: , • , , 7'47"N,82°32'44"W t32.8ft ♦2049ft
\ {
�'.
r -
l ..
49 sA W, vK ..Y
'41.7-. �y "4 .
i�1 xe� .. .K �
ft
w. ...
- 4 • ;, - . ~ fir,,4. _!
b dr. .. '4'* i
S , , , , w•.., ,+":;i
4` {t;. t ,,, ,,- ,i.
k'* +40, -a'' t
ark-Seu S.tttn92. `�f -.
K-0 1 View of seep location facing northeast. ,
Page 8 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress, LLC SynTerra
0103°E(T) 135°27'48"N,82°32'40"W±16.4ft •2051ft
ba • = 1
t-.
A 0 IN
K-02 .
3 Yr? ' s M • ir
"-As yil.• 4.VE
K-02 View of dispositioned seep location facing east.
e
_ _ -
0 80°E(T) �• , N,8 __ _. •
C I .S YA t 1
'tpom� 6
t,
• !!1 r p `3 "► * x,
t't �t +►� ,A,—*,,, 2'`10,, 4.� ,.\
, ',.;., ' ' - "1,,,,„„, ,, A.,%,4)7, /1 A '
it
1; A!
t1
0 Mar 20 < , ;,
1
M-01 View of seep location facing east. )
Page 9 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
®37°NE(T) • 35°28'26"N,82°33'5"W t16.4ft ♦2042ft
s
: r� j1 f .`. •
4 •. _•.i • -
.74
N-Ot ' '!� �+" 3y Ss
Your Waterj{ark
:N-01 View of SOC sample location facing northeast.
210 272 3"-
• t . I . I • t • t • 1 • t • t • t • t • I • t
®233°SW(T) •35°27'42"N,82°32.40"W±16.4ft ♦2082ft
Asia
• ,
.r+
4
•�i4 .Q lr.r i .
�• e c s
o
,11
Previous photo(Spring 2019 inspection)of dispositioned seep
I'-01 location facing southwest. Limited access to seep location due
to Plant activities during Spring 2020 inspection.
Page 10 of 13

` 2020 Interim Seep Report April 2020 I
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerraII
0 268°W(T) • 35°28'2"N,82°33'1"W±16.4ft •2010ft
Y0" p
flit
tt
'y , ..fit, . y - .
it a `t
yY . 4. , f a
' f;
..
V.C. ; i '4.,. *i ♦,.
.. '. z .i
— „.
,,, ,... , ,,„, ts,,...
,;+
Ponded Water F View of seep location facing west.
AM*. S
• 2055ft
0 1 i
f ,
4.
r' - ..
.
YAnAti l&nt -ftl: i1 :Srlr :51 /
SD-01 View of dispositioned seep location facing north.
Page 11 of 13

• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
O 181°S(T) • 35°27'50"N,82°32'41"W-16.4ft •2041ft
. _ r
s
'o.
or 4
..$' `�►```y•`�... 4y� 100•4 4 .,,v of
..�\> � `��� ,;.fit Js' �� te.
,c,lb•k1741. t.—....s f 4 ' ,,,%, t
1'o shr, r .
s iryVuterrnark•Se '312' 'll •
82E0-01 View of seep location facing south.
S
O 249°W(T) • 35°27'50"N,82°32'41"W±16.4ft •2043ft
w. • • y`
V ` i44 lif LT R ,.
.
# 1 1'.
•'. 4., • �,I�Jr�.1.*j����1
.114 it/jig. A•.•. 4• / n- .• I�Imo.
Ny s .� ice/
oe
ai pet 3 ,) • d;( t. rs1/%44#!
82EO r .'? - =1r 202, i,a�
82E0-02 View of seep location facing west.
Page 12 of 13

F
• 2020 Interim Seep Report April 2020
Asheville Steam Electric Plant-Duke Energy Progress,LLC SynTerra
©277°W(T) �4 35°27'59"N,82°32.38"W±16.4ft •2140ft
.r .1, "
t . :' .* .1_,Ai.:- A
-
ter.
. , , .0.4..141.....4., , ;-t
`iv
'` w ,i ,
i '-dr.lit
♦ id k f*M
, ,t...s -4- i::-,4„..,.fr-15" ..,r,„_.- ,
DD-Pipe View of seep location facing west.
ems,
Page 13 of 13