NC0005088_02_CSS_CAP Update 2019_Figures_20191231

Corrective Action Plan Update December 2019
Cliffside Steam Station
FIGURES
(CAP Content Section 10)
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FIGURE ES-1
USGS LOCATION MAP
�' ENERGY
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CORRECTIVE ACTION PLAN UPDATE
CAROLINAS
ASHEVILLE •
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CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
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RUTHERFORD CLEVELAND
COUNTY
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DRAWN BY: J. KIRTZ DATE:06/12/2019
REVISED BY: C. DAVIS DATE: 12/27/2019
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GRAPHIC SCALE
0 500 1,000 2,000 3,000
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PROJECT MANAGER: S. SPINNER
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(IN FEET)

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PROJECT MANAGER: S. SPINNER
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AREA PROPOSED FOR ACTIVE GROUNDWATER REMEDIATION
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— - DUKE ENERGY CAROLINAS PROPERTY LINE
1 STREAM (AMEC NRTR)
® WETLANDS (AMEC NRTR)
® AREA UNDER FURTHER INVESTIGATION
NOTES
1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015,
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 16, 2019. AERIAL DATED FEBRUARY 25, 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE ES-2a
AREA PROPOSED FOR
CORRECTIVE ACTION
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

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PROJECT MANAGER: S. SPINNER
LEGEND
AREA PROPOSED FOR ACTIVE GROUNDWATER
ASH BASIN WASTE BOUNDARY
- ASH BASIN COMPLIANCE
ASH STORAGE AREA
)I ---STREAM (AMEC NRTR)
WETLANDS (AMEC NRTR)
® AREA UNDER FURTHER
NOTES
�• 1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 16, 2019. AERIAL DATED FEBRUARY 25, 2019.
y 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE ES-2b
300 AREA PROPOSED FOR
CORRECTIVE ACTION
9 FORMER UNITS 1-4 ASH BASIN
9 CORRECTIVE ACTION PLAN UPDATE
9 CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

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1 STREAM (AMEC NRTR)
WETLANDS (AMEC NRTR)
Ot
AREA UNDER FURTHER INVESTIGATION
NOTES
1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 16, 2019. AERIAL DATED FEBRUARY 25, 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
GRAPHIC SCALE
200 0 200 400
(IN FEET)
DRAWN BY: J. KIRTZ
DATE: 06/21/2019
REVISED BY: C. DAVIS
DATE: 12/18/2019
CHECKED BY: T. GRANT
DATE: 12/18/2019
APPROVED BY: T. GRANT
DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
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FIGURE ES-2c
AREA PROPOSED FOR
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UNIT 5 INACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

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WELL
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- ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA BOUNDARY
I STREAM (AMEC NRTR)
WETLANDS (AMEC NRTR)
NOTES
1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 16, 2019. AERIAL DATED FEBRUARY 25, 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM RIPS 3200 (NAD83).
GRAPHIC SCALE FIGURE ES-3a
soo 0 100 zoo PROPOSED CORRECTIVE ACTION APPROACH
ACTIVE ASH BASIN
DRAWNBY:C.DAVS DATE:12/17/2019 CORRECTIVE ACTION PLAN UPDATE
REVISED BY: C. DAVIS DATE: 12/17/2019
CHECKED BY: T. GRANT DATE: 12/17/2019 CLIFFSIDE STEAM STATION
APPROVPROJECT
MAN GET. RA. DATE:12/17/2019 MOORESBORO NORTH CAROLINA
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2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
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5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
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FIGURE ES-3b
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DRAWN BY: C. DAVIS
DATE: 05/03/2019
CORRECTIVE ACTION PLAN UPDATE
REVISED BY: C.DAVIS
DATE: 12/18/2019
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DATE: 12/18/2019
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PROPOSED SOURCE CONTROL TRENCH
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® WETLANDS (AMEC NRTR)
NOTES:
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US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
t� WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 16, 2019. AERIAL DATED FEBRUARY 25, 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM RIPS 3200 (NAD83).
FIGURE ES-3c
PROPOSED CORRECTIVE ACTION APPROACH
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COUNTY
CHECKED BY: T GRANT DATE: 12/17/2019
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LEGEND
WELL IN ASH PORE
WELL IN SHALLOW ZONE
WELL IN DEEP ZONE
WELL IN BEDROCK ZONE
WELL
Q NON -CONSTRUCTED SEEP (APPROXIMATE)
DISPOSITIONED SEEP (APPROXIMATE)
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SEDIMENT SAMPLE LOCATION (APPROXIMATE)
SURFACE WATER SAMPLE LOCATION
EFFLUENT WATER SAMPLE LOCATION
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STREAM (AMEC NRTR)
® WETLANDS (AMEC NRTR)
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE
DEEMED APPROXIMATE.
2. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
3. NRTR NATURAL RESOURCES TECHNICAL REPORT
4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
5. ALL BOUNDARIES ARE APPROXIMATE.
6. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 16, 2019. AERIAL DATED FEBRUARY 25, 2019.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 1-2
SITE LAYOUT MAP
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

FUTURE UNIT 5 INACTIVE ASH
BASIN WASTE BOUNDARY
z
I
E STEAM STATION
INE
UNIT 1-4 POWER PLANT
E
1
s �
� a �
f �
r `
FUTURE CCP LANDFILL
WASTE BOUNDARY DUKE POWER Rono-
MIEZ
SOURCE:
MARCH 30, 1955 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITE AT
http.,//earthexplorer.usgs.gov/
I
I
r FUTURE ACTIVE ASH BASIN
WASTE BOUNDARY
CLIFFSIDE STEAM S'
a
�DUKE GRAPHIC SCALE
� 400 0 400 800 FIGURE 1-3
ENERGY IN FEET
CAROLINAS DRAWN BY: J. CHASTAIN DATE' 12/21/2019 1955 AERIAL PHOTOGRAPH
REVISED BY: J. CHASTAIN DATE: 12/21/2019 CORRECTIVE ACTION PLAN UPDATE
CHECKED BY: T.DATE: 12/21/2019 CLIFFSIDE STEAM STATION
APPROVED BY: T.. GRANT DATE: 12/21/2019
PROJECT MANAGER: S. SPINNER MOORESBORO, NORTH CAROLINA
WnTerm www.synterracorp.com

Rogers Energy Complex Simplified
Process Flow Diagram Post Outfall 005
Operation
I Broad River I
Unit 6 Co-ol ing
Tower
Slowdown
Raw Water
Tank.
Unit 6 Mechanical
Drag Chain
Owerflow
PFRaw Water
Treatment
Uri it 5 Pi
Drain
Unit S Mechanical
Drag Chain
overflow
I Runoff
I
een
;h
Limestone
Pile Runoff
0-43 MGD
Reject
�UnitRO
Veit 6Storm
Water
1.5 MGD
Unit 5 Cooling
Tower
�dn S.5 MGD
Unit 5 Flw Ash
Silp Sump
Not to Scale
Legend
= Process Flaws
— - — - — - — = Overflows
Unit fi Pro€ess 1035 MGD ,j,
Sump
0.3 IVIGo
ILandfill Lea€hate
0.003 MGD Veit 5 $a
e
5 Yard
m
0.95 M G D
tJnit 5 Process
Sump
FGD
mergenry
002C
Holding Basin
mergency
Ovefio-w � .
0038
Optnnal
Holding Cel I
o-Do35 MGD
nitary 02 MG0
Unit GIFGD
nda 5 stem
0-0015 MGD
3-15 MGD
1.13 MGD
0.8 MGD
Heat
EKhangers
FGD WV"S Inaa0l
a-2MGDp
4
,
U-DS MGD
Final VAM
25 MGD
Ash Basin
Decanting and
Dcwatcring
Temporaeyr
W WTS
0.15 MGD
External
Oultfall DOS
6.0 MGD
External
Outfal10a2
1.0 MGD
DUKE DRAWN BY: T. COLTON DATE: 12/17/2019 FIGURE 1-4
ENERGY REVISED BY: SIMPLIFIED PROCESS FLOW DIAGRAM
GARflLIh1g5 CHECKED BY: T. GRANT APPROVED BY: T. GRANT POST OUTFALL 005 OPERATION
PROJECT MANAGER: S. SPINNER CORRECTIVE ACTION PLAN UPDATE
16' CLIFFSIDE STREAM STATION
synTerra MOORESBORO, NORTH CAROLINA
www.synterracorp.com

1
r'`
.
1
_J
�a
e
a
Wow
K
Pow'
F
.00
1 ® •r GWA-30S
MW-32BR
-
- .,
�
, , J
�` • GWA-30BR
.
M
A
MW-30DA
CCPMW-1S
CCPMW-1D
,�SED-16
�
V 1
I
' i
1 �> DUKE
• ��� �' ENERGY
CAROLINAS
_ ♦ ♦ .)
1000*
,.� o�. 1 FORADDITIONAL
SAMPLE LOCATIONS TO
SALLENGER Ro! -, . - synTerra
_ THE SOUTH SEE INSET A
GWA-24BR .
GRAPHIC SCALE
400 0 400 800
(IN FEET)
DRAWN BY: J. KIRTZ DATE: 06/12/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
m
INSET A
"=1,675
LEGEND
0 GROUNDWATER SAMPLE LOCATION
SOIL SAMPLE LOCATION
SOIL/GROUNDWATER SAMPLE LOCATION
0 SEDIMENT SAMPLE LOCATION
SURFACE WATER SAMPLE LOCATION
ASH BASIN WASTE BOUNDARY
• • - ASH BASIN COMPLIANCE BOUNDARY
LANDFILL / ASH STORAGE AREA BOUNDARY
LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY CAROLINAS PROPERTY LINE
I STREAM (AMEC NRTR)
WETLANDS (AMEC NRTR)
NOTES:
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND AREA MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO
BE DEEMED APPROXIMATE.
2. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015,
3. NRTR - NATURAL RESOURCES TECHNICAL REPORT
4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
5. ALL BOUNDARIES ARE APPROXIMATE.
6. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON DECEMBER
16, 2019. IMAGE COLLECTED ON FEBRUARY 25, 2019.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
FIGURE 4-1
BACKGROUND SAMPLE LOCATION MAP
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

SITE FEATURES KEY -
�r
jr
GROUNDWATER FLOWS FROM RIDGES TO THE SOUTH ALONG PORTIONS OF DUKE-
y
O POWER ROAD (MCCRAW ROAD), TO THE EAST OF THE ACTIVE ASH BASIN, AND WEST OF
THE UNIT 5INACTIVE ASH BASIN, THAT COINCIDES WITH GROUNDWATER DIVIDES WHICH
PROVIDE HYDRAULIC CONTROL OF CONSTITUENT MIGRATION WITHIN FORMER STREAM
VALLEYS AND AWAY FROM POTENTIAL RECEPTORS AND WATER SUPPLY WELLS
r :r
© LIMITED COI MIGRATION THROUGH TRANSITION ZONE AND INTERCONNECTED
BEDROCK. BEDROCK FRACTURE OCCURRENCE DIMINISHES WITH DEPTH
© FORMER SUCK CREEK CHANNEL PRIOR TO RE -DIRECT DURING CONSTRUCTION OF THE -
ACTIVE ASH BASIN ,
IMPOUNDED ASH BASIN WATER CAUSES LIMITED AREA OF DOWNWARD
OVERTICAL MIGRATION OF CONSTITUENTS NEAR THE DAM DUE TO ELEVATED -
HYDRAULIC HEAD -
✓,t
©AREA OF COI CONCENTRATION IN GROUNDWATER GREATER BAD RIVER
GROUNDWATER DISCHARGES TO SUCK CREEK AND THE z'
L
THAN CRITERIA (SEE GENERAL NOTE 1)
® AREA UNDER FURTHER INVESTIGATION
GENERALIZED GROUNDWATER FLOW DIRECTION
ON-► GENERALIZED ASH PORE WATER FLOW DIRECTION
STREAM
--� APPROXIMATE FORMER STREAM WITH FLOW DIRECTION
ACTIVE ASH BASIN WASTE BOUNDARY
FORMER/INACTIVE ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
®GENERAL AREA OF WATER SUPPLY WELL USERS
(SEE GENERAL NOTE 2) / /
-/ GENERALIZED BEDROCK FRACTURE
EAST CONCEPTUAL CROSS-SECTION OF PRE -DECANTING CONDITIONS
(NOT TO SCALE)
A Aw� -
WEST CONCEPTUAL CROSS-SECTION OF PRE -DECANTING CONDITIONS
(NOT TO SCALE)
B B71
I
- -OLDIE
I
GENERAL NOTES
1) AREA OF COI CONCENTRATIONS IN GROUNDWATER GREATER THAN CRITERIA ARE BASED
ON 2018/2019 MEAN VALUES FOR THE SHALLOW, DEEP, AND BEDROCK FLOW LAYERS.
2) PERMANENT WATER SUPPLY HAS BEEN IMPLEMENTED PROVIDING 67 SURROUNDING WELL
USERS WITH PUBLIC WATER SUPPLY CONNECTIONS, THIS WORK WAS COMPLETED IN
ACCORDANCE WITH HB630 AND SUBSEQUENTLY APPROVED BY NCDEQ ON OCTOBER 12, 2018.
3) ALL BOUNDARIES ARE APPROXIMATE.
/ I
/
xe000,
NORTH

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-2
LeGrand Slope Aquifer System
Included in Section 5 text

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-3
Ash Basin Current Flow Conditions
Included in Section 5 text

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-4a
Water Level Map (East) —Shallow Flow
Zone
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-4b
Water Level Map (East) —Deep Flow
Zone
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-4c
Water Level Map (East) —Bedrock Flow
Zone
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-5a
Water Level Map (West) —Shallow Flow
Zone
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-5b
Water Level Map (West) —Deep Flow
Zone
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 5-5c
Water Level Map (West) -Bedrock Flow
Zone
Provided in separate electronic figure file as a
large sheet size

800
750
p 700
a
w
J
w
650
600
718.11'-----------718_19'_ —
— — — — — —
PORTION OF
CROSS SECTION K-K'
J
mm
Ln
tC
7 G o cm
a
co co
SUCK N a a
FILL
a
a
J41
LQ
CREEK
a
3
M
`�
MELEV.714.72WNcq
�04
N
w 00
i ti ^ �__ r ='� —~ L� 727.
\ ----- 72O.33' \
1 \
------717.35'
—
---__ —
ACTIVE ASH BASIN
J
N
N
N
t0
-� 1 TRANS ION ZONE_L4_
!: EO� ;:7 x
/ !-� it k-f-1'i �-/TL�1 I�i\ �,(>-\ �\\n\I % / l //I '/ \/ji \�(/ / \ / I l�/ / / / I/t/\l-� \ /7/
/I-- \\/ \ \/ V \ Ill \/ / `
Z -�' TT/ \ \ \\ 0/\--\\/ y 1/11--� /�\-
cre
\ / \I /
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FORAPPARENT DIP WITHIN THE PLANE OFTHE CROSS SECTION, AND
VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUSTO
ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH
ARE CONCEPTUAL ONLY.
o.. f..
ASH
STRREAAG E
/
cRosssfc
oN
ACTIVE
ASH BASIN
�Qk
,
NOTE:
CROSS SECTION IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
LEGEND
GWA 58S WELL IN SHALLOW LAYER
GWA 58D WELL IN DEEP LAYER
GWA 58BR WELL IN BEDROCK LAYER
v —GENERALIZED WATER TABLE
GENERALIZED VERTICAL
699 - 698 POTENTIOMETERIC LINES
1. DEPTH TO GROUNDWATER GAUGED IN MONITORING
WELLS ON APRIL 22, 2019.
2. SURFACE WATER ELEVATION ESTIMATED FROM SURVEY
DATA COLLECTED ON APRIL 22, 2019.
3. ALL VERTICAL ELEVATIONS ARE MEASURED
IN FEET, NORTH AMERICA VERTICAL
DATUM (NAVD) OF 1988.
ASH
ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
c" BEDROCK
715.39
WATER LEVEL ELEVATION (NAVD 88)
(LABEL COLORING BY FLOW ZONE)
GENERALIZED BEDROCK FRACTURE
ORIENTATION
WELL SCREEN
COMPLIANCE BOUNDARY
III\.
III■\._
800
750
00
op
0
>a
Z
700 p
650
a
w
J
w
CROSS SECTION LOCATION

fr'F
63 GWA-14S
1101 GWA-14D x
<50
�_ _
120 GWA-38S
<50 GWA-38D
NW
NW
' NW
84 .GWA-136R
1 �J
r ' �♦ ' k I fo
+ �:
J. fa.
s: }
# NW
r
72 GWA-62BRU
307 GWA-62BR
w
-
-�• }
�w o
Alo
a�
NW
<50 GWA-60BRU G
-♦ <50 GWA-60BR +�
NW 1
t
<50 GWA-61 BIR
<50 GWA-61 BR
<50 GWA-44S
<50 GWA-44D
55 GWA-44BR
r
<50 MW-23S
t<50 MW-23D
<50 MW-23DR
<50 GWA-33S
<50 GWA-33D
160 GWA-336R
1 <50 GWA-12S
<50 GWA-12BRU
NW
d
NW,
1 597 GWA-59D
593 GWA-59BR
<50 GWA-58S
<50 GWA-58BRU l
I366 GWA�BBR
GWA-2os 283
GWA-20D 921 t 1 330 AB-2S
GWA-20BR 258
343 AB-2D
476 AB-2BRo
DUNCE
ENERGY
CAROLINAS
4'
synTena
GRAPHIC SCALE (IN FEET)
75 0 75 150
DRAWN BY: C. DAVIS DATE: 12/18/2019
REVISED BY: C. DAVIS
REVIEWED BY: T. GRANT
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
I
LEGEND
NW NO WELLAT DEPTH INTERVAL
OBORON LESS THAN BACKGROUND VALUE (50 Ng/L)
OBORON GREATER THAN BACKGROUND VALUE (50 Ng/L)
OBORON GREATER THAN 02L STANDARD (700 Ng/L)
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA BOUNDARY
DUKE ENERGY CAROLINAS PROPERTY LINE
STREAM (AMEC NRTR)
tVERTICAL GRADIENT DIRECTION
NOTES:
1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR
WELLS BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES
BETWEEN JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATA SETS CONTAINING
FEWER THAN FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS
USED.
2. VERTICAL GRADIENT MAGNITUDES CAN BE FOUND IN APPENDIX B
3. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
4. NRTR - NATURAL RESOURCES TECHNICAL REPORT
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
6. ALL BOUNDARIES ARE APPROXIMATE.
7. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM RIPS 3200 (NAD83).
FIGURE 5-7
AAB UPSTREAM DAM MEAN BORON VALUES
AND GENERALIZED VERTICAL GRADIENTS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

7-..;- �_
f
L
� a It11 1 111 1�t1 � r •- rt ��t
111 111 1 1111 !1l111 111111�11111��. �� 11 1 � �� �
owl+ A 11t
lrr 'tip . ��� �` t r - fr It
•� 1'�" \�� �� , �"� ,r�*4 11 1' 11
�1111 �f
i 111\\ t 1 rllr 111111 1111�1 f•' ��ti 1 j!. . - 1 � �" \ � 1>t 11 1 ��
t i\ r
1 1 -: 1 I 111� :��� � 1111 1 • r � Ijj! .' '':� i�. <<� ttt .�\ � �_ `�
1 t 1 11 IIl rrI #0 t 111146
1
tA,
it
'� .�1 1_• f f - 4 , 111 + LEGEND
Ilk
4�_
NOTES: ,� _�' __ '+♦ram ��'_ y�` `�\ � +`\�
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY). .-."' � ` ��� #�� ♦A�� ```
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS. • • �• - r ., •�\ 1 _�
"II
r
r!I
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS.
�. • '�
' �-' • ` �.
�� 1 �' •
ASH BASIN WASTE BOUNDARY
4. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR
CLIFFSIDE STEAM STATION, MOORESBORO, NORTH CAROLINA, 2019 (FALTA,
-"
♦ •
'• ~' `' ♦`` �'
\
\
\ `\
MINE ASH BASIN COMPLIANCE BOUNDARY
GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2019).
--r �+
�+ �+ �. �+♦♦
:
ASH STORAGE AREA BOUNDARY
♦'`�
��
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US
�' �' �' •
~ ti
~ \
y[�i�
• �/
1
- ' DUKE ENERGY CAROLINAS PROPERTY LINE
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
r
r
'� '�
w ■
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
STREAM (AMEC NRTR)
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER
r r
r r r +r
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
`
�> DUKE 350
GRAPHIC SCALE
0 350
FIGURE 5-8a
r
r r
/
700
6. NRTR -NATURAL RESOURCES TECHNICAL REPORT
\
1 '�
ENERGY
(IN FEET)
VELOCITY VECTOR MAP FOR PRE -DECANTING
2 CAROLINAS CONDITIONS - DEEP FLOW ZONE (MODEL LAYER 15)
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 31 .` DRAWN BY: K. KING DATE:06/12/2019 CORRECTIVE ACTION PLAN UPDATE
♦ REVISED BY: C. DAVIS DATE: 12/17/2019
8. ALL BOUNDARIES ARE APPROXIMATE. , .1 ` ` CHECKED BY: T.GRANT DATE:12/17/2019 CLIFFSIDE STEAM STATION
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE ~ ~ \, APPROVED BY: T.GRANT DATE:12/17/2019 MOORESBORO, NORTH CAROLINA
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). \ ti •• ` synTerra PROJECT MANAGER: S. SPINNER
ti
www.synterracorp.com

1
i 11 i�I 1 ilil ��l1li liliii�11111tt 1 �� t f 1 1 �1 rl1 1�!!!! 11j1'� tilii`
« 11 1 1 1 1 t t i
ti4w.41 !rt III ��� ! 11 • 11 �1 ttl \�1 t�: .. 1t"� .Yr t 1
t - r 1 ,• , �� -t • � � irl 1 �1\ t 1 r r f! lrrl ri111 ,•' ��\ ��11 � ! � 111
18
,■�A � �• ���' �,��� r r
1 � 1 t � ' `1 ��llri� il'Itl_ 1 tl� iiirii ,r1. r r Illltt • -= --� 11� rf � ` " � >
� t t.i
rlf��1,
it
If
•� �1 ii -
`,� � j � �•: )� !�/ �;' � lair �•����' � I' � �� � LEGEND
• r' ►� \' 1
NOTES: --r ��+ r 1Y/ ..'�� �. ` �`,l� •��3` ! !' • ,��` 4
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY). �• \ ++ `
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS.
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS. �� • �� _ �ti ♦ ` 7
4. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR " `•' �` • �. * .•~ \ ! 7 w ASH BASIN WASTE BOUNDARY
CLIFFSIDE STEAM STATION, MOORESBORO, NORTH CAROLINA, 2019 (FALTA, —+ �. �. �. ♦� r MI ` ■ ■ ASH BASIN COMPLIANCE BOUNDARY
GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2019). ASH STORAGE AREA BOUNDARY
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US -�. �. +. ti. �. ti. ♦♦ •� '� 1 r •� .' '�
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP �` • _ - ti ti _ �1 ■ ■.�� ,� • ' DUKE ENERGY CAROLINAS PROPERTY LINE
IS NOTTO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE �+ �. �.. + STREAM (AMEC NRTR)
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND +� ..
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015. r PUKE GRAPHIC SCALE FIGURE 5-8b 350 0 350 700
6. NRTR - NATURAL RESOURCES TECHNICAL REPORT ~ �' ENERGY VELOCITY VECTOR MAP FOR CLOSURE-BY-
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. ` ~ CAROLINAS (IN FEET) EXCAVATION - DEEP FLOW ZONE (MODEL LAYER 15)
8. ALL BOUNDARIES ARE APPROXIMATE.
r 3 .� DRAWN BY: K.KING DATE:06/12/2019 CORRECTIVE ACTION PLAN UPDATE
�, ♦ REVISED BY: C.DAVIS DATE:12/18/2019 CLIFFSIDE STEAM STATION
e ♦`� ` ` �� CHECKED BY: T. GRANT DATE: 12/18/2019
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE APPROVED BY: T. GRANT DATE:12/18/2019 MOORESBORO, NORTH CAROLINA
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). \ ti ♦♦ • synTerid PROJECT MANAGER: S. SPINNER
www.s nterracor .com

—
! -
!t 111
-
iikN tl�\ �
\I < < f f f 1 • 111� tt it rtitl _,\��� Itit�♦ .-: 1 -� i ff, ri`����1 i i � � 1 = I
\,\\� � t 1 � t : - . ffl, �
t I y`♦1 lt��� t�\�� it11 t t r 1 f \ •'•� J✓/ �11� R_ t I
itit 1 1 f f f jj � y •. � � iit�`
�,;;'-. frtl��`.�
t s, i 1 jlr fill
tit [ ,1 I 1 1 1 ! •z� : y ��. tip.. �1
�I �i�t r�- f rf f 1i �r ; ,/I .rill �`����i�ttf jj j fr -=^::: �,�--.—'�r1r� / - rfr ;•����` `�.�``
.•1�I •�_j�1j i \ •
'• 1•t 1 1 /*� ` + jlffl LEGEND
••'♦�� � � \����� r`��� ; tsir � ail �' � �`� �
NOTES:
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY).
�\ �'� ♦ it
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS. . _� , , L = .. ` �_ •` �� . ,1 �,� `
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS.
4. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR
ti,•
�,• ti ti • ��• ` � ,f. 1 �
� ` `
� �
� �
� � , � `
� `
� ASH BASIN WASTE BOUNDARY
CLIFFSIDE STEAM STATION, MOORESBORO, NORTH CAROLINA, 2019 (FALTA,
~' ~' • �"
~ ~
♦
�♦ ` ~
� � � � ASH BASIN COMPLIANCE BOUNDARY
GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2019).
+.
+. �. +. %••
•• '�
'�
♦ ♦
ASH STORAGE AREA BOUNDARY
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
r
r r �. �.. `�
•
r
♦♦ ♦ ♦
■ •t �1
� • � DUKE ENERGY CAROLINAS PROPERTY LINE
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
r
1 ~ • •
M
STREAM (AMEC N RTR)
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
r r
•
.� •
FIGURE 5-8c
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
GRAPHIC SCALE
.` ti �> DUKE 350 0 350 700
6. NRTR- NATURALRESOURCESTECHNICALREPORT
•
ENERGY
VELOCITY VECTOR MAP FOR CLOSURE -IN -PLACE
�-
�• rA:�
CAROLINAS
(IN FEET)
CONDITIONS - DEEP FLOW ZONE (MODEL LAYER 15)
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
`
DRAWN BY: K. KING DATE:06/12/2019
CORRECTIVE ACTION PLAN UPDATE
8. ALL BOUNDARIES ARE APPROXIMATE.
♦
~ ♦
'
V
REVISED BY: C. DAVIS DATE: 12/17/2019
CHECKED BY: T.GRANT DATE:12/17/2019
CLIFFSIDE STEAM STATION
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
�`
APPROVED BY: T. GRANT DATE:12/17/2019
MOORESBORO, NORTH CAROLINA
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
` '•
synTerid
PROJECT MANAGER: S. SPINNER
www.synterracorp.com

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NOTES: ' ~ r ��`\ � ,� 1 t`� y`y\ •yy `\ t i t r l I t�t�+ .. =t � . yy�� 1
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY).
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS.
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS.
4. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR ~ -... ~' ~' • ti ' it ASH BASIN WASTE BOUNDARY
CLIFFSIDE STEAM STATION, MOORESBORO, NORTH CAROINA, 2019 (FALTA, "' •`` ` y t r ��� ■ ASH BASIN COMPLIANCE BOUNDARY
GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2019).
_ ASH STORAGE AREA BOUNDARY
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ��' . ' ti ~ ~ • - DUKE ENERGY CAROLINAS PROPERTY LINE
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE , , I STREAM (AMEC N RTR)
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER r GRAPHIC SCALE FIGURE 5-9a
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015. '� r DUKE 350 0 350 700
6. NRTR -NATURAL RESOURCES TECHNICAL REPORT � �
ENERGY VELOCITY VECTOR MAP FOR PRE -DECANTING
CAROLINAS (IN FEET) CONDITIONS - BEDROCK FLOW ZONE (MODEL
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS. 3 ` DRAWN BY: K. KING DATE:06/12/2019 LAYER 17)
REV AVIS
8. ALL BOUNDARIES ARE APPROXIMATE. r ~ 1, j• CHEICKKED BY: T. GRADBY:C..GRANT DATE: 11/11/2019 DATE:11/11/2019 CORRECTIVE ACTION PLAN UPDATE
CHE
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE ~ �' ~ ~' • ` ' APPROVED BY: T.GRANT DATE:11/11/2019 CLIFFSIDE STEAM STATION
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83). 4 �� ` PROJECT MANAGER: S. SPINNER
�ynTerra MOORESBORO, NORTH CAROLINA
www.synterracorp.com

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/ � , f I r � f * � �' 1 LEGEND
f f l � � � { I N N 0, a � �
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-. .1, f # PEI\ t
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j y #
NOTES: �� ,--t IF �-a ,� } ti; J Al, ; �k
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY).r+F L ` # - ♦, \ _
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS.
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACKARROWS.
� - •�
� �' •
� �
4
ASH BASIN WASTE BOUNDARY
� `♦ �-r
�
4. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR
♦
9
All
CLIFFSIDE STEAM STATION, MOORESBORO, NORTH CAROLINA, 2019 (FALTA,
�* �* �+ • `
1
NONE ASH BASIN COMPLIANCE BOUNDARY
GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2019).
.--w ` ♦
+
ASH STORAGE AREA BOUNDARY
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US
♦♦
•
- ' DUKE ENERGY CAROLINAS PROPERTY LINE
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS
NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
♦ - •
y
_ _ _ _ Y
•
STREAM (AMEC NRTR)
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER
'--F
GRAPHIC SCALE
FIGURE 5-9b
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
DUKE
350 0
350 700
6.NRTR-NATURAL RESOURCES TECHNICAL REPORT
'
VELOCITY VECTOR MAP FOR CLOSURE-BY-
•
ENERGY®
(IN FEET)
44
CAROLINAS
EXCAVATION - BEDROCK FLOW ZONE (MODEL
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
DRAWN BY: K. KING
DATE: 06/12/2019
LAYER 17)
'-`
i
8. ALL BOUNDARIES ARE APPROXIMATE.
♦♦`
CREVISED HECKED
C.DARA
CHECKED BY: T. GRANT
DATE:12/17/2019
DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
./�
�+
APPROVED BY: T.GRANT
DATE:12/17/2019
CLIFFSIDE STEAM STATION
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
♦♦
PROJECT MANAGER:ww.synterra
s)mTerra
MOORESBORO, NORTH CAROLINA
�
www.synterracorp.com .com

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i � � � � � ''� 1�' . • ` � t�� .1 , �� ,1�� f �� ���,�"��•� ..��� � ` ' �
I l: •�
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iqr
Ilk-
.11, rT Ile,
C \ 1 i•-N%:.. �! �l �1� •,, S `\ ��• ` �, i ��ji jfw LEGEND
NOTES: / �• �. �� 1 � �' r � ti~�r �.`�� y ,``��< ` \��,� \��\ � 1 i 1 � _. r r�r / ��t• • • \��� �t
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY). "' '• r r S
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS. y - • ~` �' �' _ ' I �' *,�
V• �,
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS.
4. UPDATED GROUNDWATER FLOW AND TRANSPORT MODELING REPORT FOR
v ti `
•�
` �
'�
` • *N
`�
ASH BASIN WASTE BOUNDARY
1 ■ ■ ■ ASH BASIN COMPLIANCE BOUNDARY
CLIFFSIDE STEAM STATION, MOORESBORO, NORTH CAROLINA, 2019 (FALTA,
~
` `
GRAZIANO, GEBRAI, EBENHACK, MURDOCH, AND YU, 2019).
ti �"`
~
ASH STORAGE AREA BOUNDARY
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US
�• �• •
DUKE ENERGY CAROLINAS PROPERTY LINE
ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
�. �. �. ~�► .
'�
'�
1
STREAM (AMEC NRTR)
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
.
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
FIGURE 5-9c
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER
GRAPHIC SCALE
ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
�•
' `� ,
'�'DUKE
350
0 350 700
VELOCITY VECTOR MAP FOR CLOSURE -IN -PLACE
6.NRTR-NATURAL RESOURCES TECHNICAL REPORT
\
ENERGY.
(IN FEET)
CONDITIONS - BEDROCK FLOW ZONE (MODEL
7. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
8. ALL BOUNDARIES ARE APPROXIMATE.
/ .`
,
•
DRAWN BY: K. KING DATE:06/12/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T.GRANT DATE:12/18/2019
LAYER 17)
CORRECTIVE ACTION PLAN UPDATE
�. �.
APPROVED BY: T.GRANT DATE:12/18/2019
CLIFFSIDE STEAM STATION
9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
♦ •
. *
synTerra
PROJECT MANAGER: S. SPINNER
MOORESBORO, NORTH CAROLINA
ti
www.synterracorp.com

AREA A
S-23
o� 0
SC_2_DN
!d.iii�i\ by S-38�/
'R-55
CLFSP-60
Active
Ash Pond
* ACTIVE
ASH BAS
.sti.
■
...: � CLFTD-52 �••
CLFSP 51
r
• , S3 `
1
r, CLFTD-04
�' ■ `'� CLFTD-05SPOIL
or AREA
q
S 18 F S 14
STORAGE
-
cy� S-15
a ; . ■ Wy' S-16 CLFSP 61 AREA
■
. J S-21
CACTIVE
■ S-27 '
■ I S-30
PO� S
S-29 S-32
' •` S-31
AREA D
■ `� S-37
■ ` \ S-36
%' y �� �• AREA C e '
SC_2_UP MCCgA ♦�
W
RD
H\NES Rp �� .
u`. /
� l ♦�
. 1
BALL.ENGE
a .
�r Y
C 1_DN
OO\NNR"R OR
! GRAPHIC SCALE
■> DUKE 650 0 650 1,300
ENERGY
CAROLINAS (IN FEET)
DRAWN BY: C. DAVIS DATE: 06/12/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
LEGEND
FIGURE 5-10
MAP OF SURFACE WATERS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

LEGEND
• WATER SUPPLY WELL
ASH BASIN WASTE BOUNDARY
- ■ - ASH BASIN COMPLIANCE BOUNDARY
LANDFILUASH STORAGEAREA BOUNDARY
LANDFILL COMPLIANCE BOUNDARY
• DUKE ENERGY CAROLINAS PROPERTY LINE
310 STREAM (AMEC NRTR)
® WETLANDS (AMEC NRTR)
NOTES:
1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
C-1007: 433
Dysart Place
-1008 _
z„
00
0
J
SfA
NINES RD
74"
'C26 GRASSY
of
1^g3
p0
SSPSE
MOUNT
PLEASANT
CHURCH RD
/-
- CAMEO DR _
♦, ,,` • Np
Dss � m
a
i f
P r
BRO
FORME
UNITS 1-4
.� ASH BASIN
ASH
UNIT 5 �]) , STORAGE SPOIL
INACTIVE a AREA AREA
ASH BASIN
ACTIVE
oNo
e
pG
�Fa\
off\
PR rc
�o o
•
ArFRO'oaz 3
0
1 �o; ♦
r ♦
I
C-1002:
2901 Fox
Place
C-1006: 291
Fox Place
�R'verfrmt
C-1004:
r�iznn _ .....
600 300 0 600 1,200
WnTCI I G GRAPHIC SCALE IN FEET
DRAWN BY: C. DAVIS DATE: 12/18/2019
REVISED BY: C. DAVIS
�' DUKE CHECKED BY: T. GRANT
fen ENERGY. APPROVED BY: T. GRANT
CAROLINAS PROJECT MANAGER: S. SPINNER
WWI
FIGURE 5-11
WATER SUPPLY WELL SAMPLE LOCATIONS
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

v� f
O
coG
'yljsT.I,T
o
o'
t-
a-
f
�P
h�
o r
J f
0
m
1
� z
w � ES Rp
/ 91 PTE RD 2102 STATE RD 2102 iN\N
/STA/TER
/ OzjOj`eACL/NGFR o_
LEGEND
WATER SUPPLY WELL
- CONNECTED TO PUBLIC WATER SUPPLY
- OPT OUT OR NON -RESPONSIVE
LOCATIONS DEEMED NOT ELIGIBLE
(BUSINESS/CHURCH/SCHOOL)
VACANT PARCELS WITHIN HALF MILE RADIUS
O PARCELBOUNDARY
ASH BASIN WASTE BOUNDARY
- - - ASH BASIN COMPLIANCE BOUNDARY
HALF -MILE RADIUS FROM ASH BASIN
COMPLIANCE BOUNDARY
f
---- LANDFILL/ASH STORAGE AREA
LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY CAROLINAS PROPERTY LINE
310 STREAM (AMEC NRTR)
f
w
MpsiFLLAR RD' ST
RO 141'IF
1,
121,
04
►1
i
f
1
� I
r �+'
L y
f
5Q
f N
fel� f
0
sT
RO' sTF
1 LAKE HOU SER RD
f DOWNRIVER DR
f
'J
0
O
0
w
f
•
NOTES:
1. INFORMATION PROVIDED IN CLIFFSIDE STEAM STATION HB 630 PROVISION OF PERMANENT WATER
SUPPLY COMPLETION DOCUMENT. DUKE ENERGY, SEPTEMBER 5, 2018 (APPENDIX D).
2. NON -DUKE PARCEL BOUNDARIES PROVIDED BY NC ONEMAP, DATED 2018.
http://data.nconemap.gov/downloads/vectorlparcels.
ArF
3. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
,'D7 IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
�02 WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
4.NRTR- NATURAL RESOURCES TECHNICAL REPORT
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
6. ALL BOUNDARIES ARE APPROXIMATE.
7. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON DECEMBER 17, 2019.
AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83).
'ALE
DUKE
ENERGY
600 ORAPHICSC600 1,200
FIGURE 5-12
HB 630 PROVISION OF PERMANENT WATER
CAROLINAS
(IN FEET)
SUPPLY COMPLETION MAP
DRAWN BY: C. DAVIS DATE: 06/12/2019
REV ISEDBY: C.DAVIS DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
CHECKED BY: T. GRANT DATE: 12/17/2019
CLIFFSIDE STEAM STATION
r1 MTi1vr♦
APPROVED BY: T. GRANT DATE: 12/17/2019
PROJECT MANAGER: S. SPINNER
MOORESBORO, NORTH CAROLINA

Corrective Action Plan Update December 2019
Cliffside Steam Station
Source Area 1
SynTerra
(Active Ash Basin and Ash Storage Area)

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 6-1
Fly Ash and Bottom Ash Interbedded
Depiction
Included in Section 6 text

00
00
a
Z
Z
O
W
J
W
A
(SOUTH)
POSSIBLE RADIAL GROUNDWATER FLOW
ACTIVE ASH BASIN
- A'
(NORTH)
\li I_\/i \/li\�i \ I_\/i \/li\li \ I_�/i ♦/li\li \ 41 \/i \/li\li \ I_\/i \ I�\ �Z `/- ♦/ I ♦/_ / 7�2.48' \��/i l ` -\ J/ /
.\/~,J•'��/`I/1\`\/\I/1"\/\I/1``\/\I/1"\/\I/1``\/\I/\`/`I/1��\/\I/1"�i�l�e♦'.//I�\\��`: /11♦�Y/`�/I'\�/ \/\I/1, \/`//\, \`\ \I \./�/\'/1\' 672W./.
,BEDROC)i9�s\�� i\\/ I \�� i`; /I / \, \/ `�/ I \�� i`; /I \` ;i`1�y�\\ `��` /I \\ \ �``!�f1-',\`/ I \/� �``/ I \li l �`/ I \ 1 \ / ♦I / 1 / \ / \I / \ �' �/ �� . /I\i� L i�
/`17i�\_�' .L`%L\ `�jAy\ `� �����/`1ii'1/ C /��TI/ �_`'.�',1/._�� `\il\'�\/`I/1�'//I�\/'.`\/I�`/���.//I�\/\ :Iv~� T\ �`./�- �� 2 '1
/��� \'/ -\ \/ \� � / \ -\'/ -\ \ -1/ . /,Y►�♦1'/ -\ \� \ � , \ -1'/ -\ \ -\/ � / \ -1'/ -\ \/ 1� . / \ -1'/ -\ \ - / \ 1 \/\I/1�'\/\ /1 \/�I 1`/ \/� /1 / I/\"\/♦ /1
BEDROCK,�/li\`il\/I/\il\\/I�\`%/I♦-♦��'\-1'/-'\-\'/-'\-\'/-'\-1'/-'� /-'�-\'/-'\
I/1/'�/\I/1``\/\I/1,��/\I/1``\/\I/1,��/\I/1``\/\I/1/��/\I'%?♦�'\/\I/\���/\I/1��\/�I/1,��/\I/\��\\/\/1_/�//I/�'�•i`/I'\`_���/I�\�/I \`�::/I/\\�; /I'`\���'R/I/\
/.�-�-\�/�-�\-\�/.�-�-\�/�-�\-1�/.�-�-\�/� �\-\�/`/-�-1�/♦-^\�-\�/.�-�-\�/�-�\-1//•�-�-\�/� /\ �/i/\`/I�\1"\/\I/1"\/\I/1"\/\I/1"\/\I/1"\/\I/\"\/\I/1`/
- /\' _ \ - i /\/ _ i l i l \`/ I \ i l /�/ i l i l \`/ I \ i l'`/ - `l i �\ / I \ 1 ' i \ I / 1 / \ i \ I / 1 ' i \I / 1 \ /
.FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
/ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE / 1 \ / \I / 1 / \I
',-ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND - 1 ' /\ \ - X /' \ - 1 ' /\ \ -
'VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO
I/ ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH ��\I/;�/�%♦I/\�/-�\I\/" \\I/1�/-\I�'\/�\/`I/\��//I/\`� �� / li \`� �\/I/\`� �� / I/ \`� �\/I/\`� �\ / li \`� �\/I/\
/.-ARE CONCEPTUAL ONLY.�/-
�'.,' FORMER Q
UNITS 1 4
ASH BASIN r
ASH
1 'CLIFFSIDE` 1, S RA
/
AREAGE
STEAM '� -
STATION - A(
' o�
ASH
UNIT
=.y
r
ASH BATS N
FAo�F'9gpgp
\����
J:.
NOTE:
CROSS SECTION A -A' IS LINEAR IN NATURE AND ALL
NIXON _ LOCATIONS NOT ALONG THE CROSS SECTION ARE
... - - PROJECTED ONTO THE CROSS SECTION.
LEGEND
GWA 25S WELL IN SHALLOW LAYER
V
ASH PORE WATER ELEVATION
GWA 25D WELL IN DEEP LAYER
GWA-21BR WELL IN BEDROCK LAYER
SHALLOW GROUNDWATER ELEVATION
AB 6S WELL IN ASH PORE WATER
V
DEEP GROUNDWATER ELEVATION
GENERALIZED WATER TABLE
-
BEDROCK GROUNDWATER ELEVATION
.�• BEDROCK FRACTURE ORIENTATION
WATER LEVEL ELEVATION (NAVD 88)
-� GENERALIZED GROUNDWATER
(LABEL COLORING BY FLOW ZONE)
FLOW DIRECTION
WELL SCREEN
0 ASH
- - -
COMPLIANCE BOUNDARY
ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
ALLUVIUM
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
2. NM - NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF
1988.
800
750
700
650 Q
a
600 Z
O
550 >
W
J
W
500
450
400
CROSS SECTION LOCATION

J-
(SOUTH)
800
750
ASH STORAGE AREA
.■■■■■■■■■NONE►
-■■■■■■■■■■■■.
00
•■■■■■■■■■►
■■■■■■■■
II
IV
TRANSITION,.
J'
(NORTH)
ii.
-'
700 / I 732.21' -
\ --------- --- ALLUVIUM
\ / - 704.65'
SAPROLITE
BROAD RIVER
-657'
650
/BEDROCK/ — \ / — \ \ TRANSITION
ZONE
It
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
600CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION. — / - \ / / BEDROCK
800
750
00
o0
Q
z
700 z
0
H
>
Lu
J
W
650
600
LEGEND
GWA 25S WELL IN SHALLOW LAYER
V
ASH PORE WATER ELEVATION
WELL IN DEEP LAYER
NOTES
n
GWA 21BR WELL IN BEDROCK LAYER
SHALLOW GROUNDWATER ELEVATION
1. DEPTH TO WATER GAUGED
IN MONITORING WELLS ON APRIL 22, 2019.
WELL IN ASH PORE WATER
V
DEEP GROUNDWATER ELEVATION
2. NM -NOT MEASURED
DURING 24-HOUR WATER LEVEL EVENT.
\j R FORME \
UNITOR ER
\ ASH BASIN
.
3. ALL VERTICAL ELEVATIONS
1988.
ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF
\ \
' SIOR \ GE
GENERALIZED WATER TABLE
V
BEDROCK GROUNDWATER ELEVATION
1 CLIFFSIDE Y ARIA
STEAM \ �u-.'
STATION ACTIVE
GENERALIZED GROUNDWATER
a UNIT 5
��
ASH BASIN
FLOW DIRECTION
WATER LEVEL ELEVATION (NAVD 88)
J
'
cr
(LABEL COLORING BY FLOW ZONE)
cz7N ASH BASIN"
\ „
ASH
ASH PORE WATER
0
WELL SCREEN
`
;oG�Fgo� (
!
® FILL
FR
<
�)
0 SAPROLITE
-
COMPLIANCE BOUNDARY
CCP
® TRANSITION ZONE
LANDFILL
;.
BEDROCK
DUKE
0 60 120 240
NOTE:
ALLUVIUM
ENERGY
HORIZONTAL VERTICAL SCALE: 1" SCALE: 48 240'
CROSS SECTION J-Y IS LINEAR IN NATURE AND ALL
CAROLINAS
5X VERTICAL EXAGGERATION
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
��
DRAWN BY: J. CHASTAIN DATE: 10/3/2019
REVISED BY: D. KREFSKI DATE: 10/30/2019
CHECKED BY: DATE: 10/30/2019
CROSS SECTION
LOCATION
APPROVED BY: S. SPINNER DATE: 10/30/2019
S. SPINNER

-
K =
(WEST)
-
ACTIVE ASH BASIN
K'
_ (EAST)
Q
m M m
GROUNDWATER FLOW IS PERPENDICULAR TO
CROSS SECTION IN THIS AREA
e
N Q Q
800
m
m a a Q a a a
3 800
O
_________FILL __________ LL
_-_-__-_--_-_--- - _
_
. __=�-_--=__--__�--=--=--_
m
Ia7fJ
m
-----------------_--_--_--__--__--___--_-__-__--
-----_-- -ASH=
-------------- �--_
---------- -------------_-F-I-
mmmmmm 78.7s
< < 4 <
750
wpm
o
r r r aoaoao O o C7
N u1 O N Q
N
w p a a a a a a , a
-___- -- -----
------------- --------------------------------- _�___ ___ - 4 - - --- ______--------------- --_______-�_--___-�__-�__-�__-__� SAPROLITE
-�_-� ASH =_ =___ ---_ _NA_-_-�__-�__-��__- -------- ----------------------
___ ___ ___ _ -____ ____________________Nq _= _ _-_____________________________________________________
=__ ___ ___ L� _-___-___-- ----------------------- - - --------------=--=-ASH PORE WATER ----__--__--__--__--___----___--__--__--__--__--__--__
_ __-_ __=--------------------- -----___--___--___--___--_____- -- _-_--__--__--__--_----------------_--__--__--__--__--__________--__--__--__--__--__--__ / 750
MM M
M M
M M 333 333 d> a�
FILL
#-=�'_ _____________________ _ ___________________________ __ ____ _______________ _____ ___ ________________ _ _=760.45'_____________- /
-
e?
Q Q
Y Y a CD0 M % C9
=___--__--__--__--__--__--___ _ _____ ___--__-- _ __________________________—
-_-__-_-__-_-__-__-__-- __
_--
__-__-_-___-- -----____
___-_--_--= ASH PORE WATER_=-=-_-__-
--_---_
a
Q Q
U' y'
____- _-_____ ______________________-__
-__ -_=-=_ASH PORE WATER--76o.5r----------------
_ ---
s------------------------
CREEK_______
AO
TRANSITION80.63'\ ZONE 785.80' 00
-
Q719.59'
718.11' 718.19j ��n ��
--- 761.53'
SAPROLITE
SAPROLITE
_____________
---_---_----_ /\ \
/ `
Z
_ _ _ _ --_ _ _ / \ / I / \ K, \ Z
/
Z 700
O
718.70'
n724O3'
- / \
\ \� j � \ / 1 y4%
\ / \
TRANSITION ZONE
, , / I
/ - _ - __ _ =- - \ \ / \ / - _► \♦� > 700 Z
TRAN TION / \ I / 1 \ / \ / \ \ / \ I / 1 i \ / \1 / h O
/
F-
Q
\ _
\ ♦ \ ♦ \ 709.46' y Y♦ ' /'
•
/
_ / 7
/
_ /
t'--ZONE
l /
/ I/ _ F-
1 _ - / - \ -r
- 1
l/8\/I/`\/l/\/I�/\I///\/W
\ \�..
\/ 729.5\
/ \�/\ /
Y/ / \ I \ / / \ I \
/
/ / \ \
8 W
Lu
nip
��
\Lu
N,t
I /
\ /� / 1 8 /,II \\ / \\� `
IF -
/
BEDROCK \ / i
650
\
BEDROCK
\
/
650
/ I / I \
✓y\
/
-I \ j BEDROCK\
\I / \ / - \ % \ / 'i / - \ % - .~♦ / \ /
FRACTURES CONCEPTUALLY DEPICTED THIS CROSS SECTION REPRESENT GENERALIZED
\ \ / �♦ /
— — \ _ — \ ♦ '` / \ — —
_ 1
ED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
L�l
ORIENTATIONS ACCOUNT FOR APPARENT DIPWITHINTHE PLANE OF THE CROSS SECTION,AND
VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUSTO
\\
\ 1 / \ / 1
\
/ \
ILLUSTRATE AT
\ / \ I / 1 / \ I ARE CONCEPTUALIONLY.LE.IN ADDITION,THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH
\ / 1 / \ / 1
/ \ / 1
\
/ -
600
600
♦I \ /
\ / �,/ \I�♦♦/� I /� / I, \
���J 748.18'
\�/� e�OA�RiD'..
LEGEND
500
/
/ \—\
/
WELL IN SHALLOW LAYER ASH PORE WATER ELEVATION
/ / \ �— \ 1 / / \/ / \� / I \ /
/li \ /
I / \ / /
♦+ \ /
\ / ` /
I / \ / / ��
` /
GWA 58D
WELL IN DEEP LAYER
SHALLOW GROUNDWATER ELEVATION
/
•
\ I l 1
FORMER
\ / \ / UNITS 1-a
Bases
GWA 58BR
WELL IN BEDROCK LAYER
%��t \ _
1 A
, \ — 1 / ;ASH
`I ASH
WELL IN ASH PORE WATER DEEP GROUNDWATER ELEVATION
\
/ / \ / I �♦♦
\ /♦, /
/ /
/�
CSTEAMFFSID w if STAORAAGE� _.
/ \ / / STATION o� ACTIVE
. —GENERALIZED
WATER TABLE
0.
/ \ /
�y
I / \ ,' ♦♦ \ / \ / \♦
/ /
% :ASH BAST -'GENERALIZED
— \ IJ K,
BEDROCK GROUNDWATER ELEVATION
450
—
\ \
— INACITIVE I . i.,, _
ASH BASI l
\
IV
ORIENTATION BEDROCK FRACTURE
WATER LEVEL ELEVATION (NAVD 88)
GENERALIZED GROUNDWATER (LABEL COLORING BY FLOW ZONE)
FLOW DIRECTION
WELL SCREEN
I \ / 1
/ \ / 1
\ t '
O
ASH
ASH PORE WATER
\ / / 1
/ ��
\ / / \ /
/ \ / \
l�� /
/ j
1
/ \ 1
— — — COMPLIANCE BOUNDARY
/
/ —
/\♦1
\ 1
\ / ccP Mcc
LANDFILL RgWRogO \�
®
FILL
400
/ \/
\ j♦` \\/ \
/ \/`
/ �/
/ \ /
I \
O
�� BREAKLINE
SAPROLITE
\
\ /
— \
TRANSITION ZONE NOT AVAILABLE OR NOT MEASURED
NOTE:
OC/�\
\ /
CROSS SECTION K-K' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE
/ / / / PROJECTED ONTO HE CROSS SECS ONCTION ARE
BEDROCK
\
I \
\ \ / % I♦�♦� / \ \
�.\ I / 1
` \ \ / CROSS SECTION LOCATION
350
\ / / I / \
/ NOTES
/ \ /
- /
\ / \\ j
\
I / \ 1. DEPTH TO WATER GAUGED IN MONITORING
WELLS ON APRIL 22, 2019.
% \
\ I / 1
` \ / 2. NM -NOT MEASURED DURING 24-HOUR
/ WATER LEVEL EVENT.
DUKE
0 60 120 240
/
/ / 1 1 / / \ \
_
1 / \
- \ 1 / 3. ALL VERTICAL ELEVATIONS ARE MEASURED
ENERGY
HORIZONTAL
VERTICAL SCALE: 1" 148 240' FIGURE
/
IN FEET, NORTH AMERICA VERTICAL
E
5X VERTICAL EXAGGERATION GENERAL CROSS SECTION K-K'
300
/ \ /
— ` / \ /
I
/
I / \ / / \ — \ / \ / — _
\ / — \ /I \ / `I / 1 \ \
/ \ /
/�-
\ / \ /
/ \ I / 1
,
DATUM (NAVD) OF 1988.
\ \ /REV
/ /
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:10/22/2019 ACTIVE ASH BASIN
CHECKED IBY:T.GRANTI DATE: 10/29/2019 DATE:10/29/2019 CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
\ \ / 1
\ \ _ 1 / —
/ —
— 1
APPROVED BY:S.SPINNER DATE:10/29/2019
MOORESBORO, NORTH CAROLINA
synTerm
PROJECT MANAGER: S. SPINNER
www.synterracorp.com

850 ­--T N mm-- N'
mo
N N ACTIVE ASH BASIN
Q Q
C9 C9 N N
POSSIBLE RADIAL GROUNDWATER FLOW
800 IN THIS AREA
jr,
OLITE Q
oo mQ l SAPROLITE
Q Q Q ASH
TRANSITION ZONE ---__-____� - _ _-�-�-�L:_--"T---_-_--_--_--__-_-_-__________________________--------_ ----------- -- ----------�6 ______________________------ / \ I --__ - -- 764.3------------------_--_------763.640750 / 1/ \ / 1 ---_=__________
Z\\\\\/ - - ___ -__ -__ -_AWATER E ___-__-__- _-_ Z----------NSITIOO / \ I \ / / \ I \ / / \ I -- _---__-_ -_- \ / ZONE
J
BEDROCK -
BEDROCK
650
/
BEDROCK
I CROSS SECTION DOES NOT INCLUDE A BEDROCK
/ EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
6001 y -_ / \ \ i 1
I
14,
LEGEND
ASH PORE WATER ELEVATION
NOTES
GWA 37S WELL IN SHALLOW LAYER
SHALLOW GROUNDWATER ELEVATION
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
GWA 37D WELL IN DEEP LAYER
2. NM -NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
FORMER
U5-5BR WELL IN BEDROCK LAYER
DEEP GROUNDWATER ELEVATION
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF
UNITS 14
ASH BASIN
( I
1988.
%
% ASH
AB 6S WELL IN ASH PORE WATER
BEDROCK GROUNDWATER ELEVATION
/
cSTEAMF\ ems',
STATION \ r I
GENERALIZED WATER TABLE
WATER LEVEL ELEVATION (NAVD 88)
INACuNlrTIVaE `-,
J •, J
r ..
(LABEL COLORING BY FLOW ZONE)
ASH BasIN ",
1 � AcrroE �
-� GENERALIZED GROUNDWATER
c�c`w
�N
!�
ASH BASIN
N r
FLOW DIRECTION
WELL SCREEN
/��
�.... N�
ASH
ASH PORE WATER
COMPLIANCE BOUNDARY
FILL
CCP �''Ai
MQR
°AwROAO � /
0 SAPROLITE
' DUKE
0 50 100 200
LANDFILL
'��
® TRANSITION ZONE
ENERGY
VERTICAL SCALE: 1 140200'
OTE:
�:�T:�i��. BEDROCK
CAROLINAS
5X VERTICAL EXAGGERATION
ROSS SECTION N-N'IS LINEAR IN NATURE AND ALLCATIONS NOT ALONG THE CROSS SECTION AREREVISED
DRAWN BY: J. CHASTAIN DATE: 10/22/2019
BY: D. KREFSKI DATE: 10/29/2019
ROJECTED ONTO THE CROSS SECTION.
ALLUVIUM
CHECKED BY: T. GRANT rc DATE: 10/29/2019
e 000 _ov a colon nATP 1n/90/9M0
850
800
750
700
650
600
op
0
Q
Z
Z
O
w
J
w
CROSS SECTION LOCATION

BROAD�SH
71 PRE -DECANTING
WITHIN ASH STORAGE AREA
TOBE EXCAVATED UNDER APOSTCLOSURE
CONDITIONS FOR
OSURE-IN-PLACE SCENARIO
CLOSURE -IN -PLACE
_ - CONDITIONS
SPOILSTORAREA
�\
ASH _
. .
`0
—�>
or
Vf �1
'���
fax ��� --� {►
s :����� �, 1 I{/
T r ���� )1\ �,
`l
K
/ ��
♦�.. / / V�/ ..�1
d / \�
I
—80 FEET
—80 FEET = . # #. �' * • ;
-° 0 FEET
0 FEET
NOTES: WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER
LEGEND ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
_APPROXIMATE SATURATEDASH THICKNESS 1 ASH THICKNESS ISOPACH SURFACES FROM FLOW AND TRANSPORT MODELS
ISOPACH (FALTAAND OTHERS,2019). 4.NRTR-NATURAL RESOURCES TECHNICAL REPORT
GRAPHIC SCALE
(> DUKE zso 0 250 50o
4 ENERGY
FIGURE 6-6
MODELED SATURATED ASH THICKNESS MAP
SASH BASIN WASTE BOUNDARY 2. THE SATURATED ASH THICKNESS IS CALCULATED USING THE APPROXIMATED 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
ASH STORAGE AREA BOUNDARY BOTTOM OF ASH FROM THE FLOW AND TRANSPORT MODEL SIMULATION AND
SIMULATED HYDRAULIC HEADS UNDER CURRENT CONDITIONS. THE HYDRAULIC 6. ALL BOUNDARIES ARE APPROXIMATE.
CAROLINAS (IN FEET)
DRAWN BY: C. DAVIS DATE: 06/07/2019
FOR PRE -DECANTING AND POST -CLOSURE CONDITIONS
ACTIVE ASH BASIN
- ■ - ASH BASIN COMPLIANCE BOUNDARY HEAD IN THE SIMULATION IS ABOVE THE TOP OF ASH IN AREAS WHERE PONDED
DUKE ENERGY CAROLINAS PROPERTY LINE WATER OCCURS, AND IN THESE AREAS THE SATURATED ASH THICKNESS IS 7. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
• OVERESTIMATED. DECEMBER 17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
REVISED BY: C. DAVIS DATE: 12/19/2019
CHECKED BY: T. GRANT DATE: 12/19/2019
��
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
STREAM (AMEC NRTR) 3. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
®WETLANDS AMEC NRTR US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
ISDICTIONAL DETERMINATION PURPOSES. THE
( ) IS NOT TO BAND ECFF
APPROVED BY: T. GRANT DATE: 12/19/2019
PROJECT MANAGER: S. SPINNER
MOORESBORO, NORTH CAROLINA
MSUB
www.s nterracor .com

SamplelD(Depth)
O.MER GWA-21BRU(5-5)
UNITS 1-4 pH
GWA-21BRU(10-10)
ASH BASIN
AA -
Sample ID (Depth)
GYPSUM
' AS-SBRU (33.5-35)
STACK-OUTAREA�,�/ )• I- P
_rr _ Sample lD (Depth) Sample ID (Depth)
MANGANESE
r
� r, � • { � • !'�� "Y � - Sample lD (Depth)
SamplelD(Depth)
j - AS-1D(3.5-5)
■ '� AS-1D (28.5-30) -
! AS-1D (58.5-60)
"t- Sample ID (Depth) pH
GWA-20D (3-5)!t AS-1D (68.5-70)'.x,
pH
ce r
�i,- Pt" Sample ID (Depth) - - . - rl
4 o GWA-27D (13.5-15) !
COBALT
( MANGANESE
_ GWA-27D (24.9-24.9)
COBALT
MANGANESE
-7;
i
j �vremn t.
I Sample ID (Depth)
GWA-26D (13.5-15)
lb
1
■•
■
s .
t
' r
Sample ID (Depth)
BGSB-GWA-25 (6-7)
GWA-25D (8.5-10)
BGSB-GWA-25 (14-15)
_ .. MANGANESE iR
BGSB-BG-1(6-7)
• s _ BG-1D (8.5-10)
! BGSB-BG-1(1-)
• - - • -' BGSB-BG-1(19-2020)
ry
Sample ID (Depth)
GWA-22S(3-5)
pH
■
■
a
■
■
■
■
■
■
■
■
■
■
Sample ID (Depth)
r GWA-23D(15.8-15.8)
■ ■
DUKE
�/
GRAPHIC SCALE
DUK£ 240 0 240 480
ENERGY (IN FEET)
DRAWN BY: C. DAVIS DATE:06/12/2019
10 REVISED BY: C. DAVIS DATE: 12/10/2019
CHECKED BY: T. GRANT DATE: 12/10/2019
APPROVED BY: T. GRANT DATE: 12/10/2019
smTerra PROJECT MANAGER: S. SPINNER
www.synterracorp.com
LEGEND
C BACKGROUND - NO EXCEEDANCES
m BACKGROUND - ONE OR MORE EXCEEDANCES
O LOCATION WITH NO EXCEEDANCES
LOCATION WITH ONE OR MORE EXCEEDANCES
y�-- ASH BASIN WASTE BOUNDARY
■ ■ ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA BOUNDARY
■ ' DUKE ENERGY CAROLINAS PROPERTY LINE
STREAM (AMEC NRTR)
NOTES:
1. DISCRETE SOIL SAMPLES EXCEED COMPARATIVE CRITERIA FOR CONSTITUENTS LISTED
UNDER THE SAMPLE ID.
2. SAMPLE DEPTH IS FEET BELOW GROUND SURFACE.
3.THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
4. NRTR - NATURAL RESOURCES TECHNICAL REPORT.
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
6. ALL BOUNDARIES ARE APPROXIMATE.
7. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINAONE MAP ON DECEMBER 17,
2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
FIGURE 6-7
UNSATURATED SOIL SAMPLE
LOCATIONS AND EXCEEDANCES
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

A
(SOUTH)
- AN
(NORTH)
ACTIVE ASH BASIN -I
W) POSSIBLE RADIAL GROUNDWATER FLOW
N N IN THIS AREA n a U) c
800 0w0 N 5 a a rn rn omI K BURDaD56 o m 800
3 V u Lo a
mmm mmmmmm mm�
F J co co aaaaaa aaa
U ASH aaa SAPROLITE TDS 84
22
WATER IN BASIN ABoauALs ASH
____ _ ______3____ B M13 —__ _________ ____ WATER IN 6ASIN
_________
____L___________
--------------
750 cLMW-06 ' =====_=�=__===_==__=_' B s3sa _`===_===_=_=__=_ -_=_=_-_=__=__=_=__'_ soa lzs s'=`s -==-=ss'=`s A109s a ns 750
_____ __________________ _ Li ID3-___-_____-___ __ _____-_
WA-255 B <50----=_'_--_---______ 504 ll1---_---_---_----_--- __ _---__ Li A&O7S
B <eo Li L1 `==s-=--s_ ASH PORE WATER—_ ______________________ __ _ __ __ soa so - _ \ B so
TDS 377 -rr =__ ___ — _ — _ ____ AB-04U115 =_- SAPROLITE SO4 139 - _==--=r =- _- — \ /
___________ _________________ TDS 189 \ \ / \ / U 25 J �
\ .soa <1 ros 34 '_``__ _______________________________-_'= B Fo6 ros 415 "`_' _=_=_== - \- / \ - \' SO4 a
/ _ _. 38 1 / \ TRANSITIONZ A&O6D __ ___ ____ ____ ____ __________ 504 11.5-__________ __ _
7UU \� ,K I / \ i / \/ / \ B <50 �� - _ BAB-09Dn B_1Op53 / / / i / FDS ll0 N N N N
\ , \ I \ - ros 77 / \ Li 3.a TR 20NEAN ION / I soa 16 i 1~L♦♦� \ I fill
700
\i \ / - _ \ Li L6 / - /yI\/IS04 <1 AB oast \ / / / I soa 3 \/��\'/1ALLUVIUM
s6.s />1
\ \ / I - \ / i / I / \/ ~♦ I - �/ ' i \ - B <so / 1 - \ / i / I / \/_� 31 / I / i \ /* \ \ - / \/ / / — / \ \ \ \ / / \ r \ / I
\ / _\ \ / - _\ <\ /\\ \ / _\ \ / - \ I / \ I \ AB-09BR / I/ \ - \ I_\ \ / I/ \ i , /1 \/\ /1/ BROAD RIVER co
\/\♦I♦/1/ \/\I/1\/\/\I/1/ \%\I/ Li 9.1 1/ \/\I/1\��/\ S 172 /\ \/1 B <50 /\/� -\�I. /\/�\/�/\r i\-\�/- \-1'/\-/\ - L--65T 00
/ �_ >. _ N / Li 8.3 / / I / Q
0 650 �- \ � \ > \ -_\' / - \ \ 1 � \ / \ - \ ? , \ -_\' / : \ \ - 1' \ A�aas \ \ - \ � \ / � / 1 / �_ / � \ // 1 / //I / \�\ / I / \\i \` /I / \\, \ GWA-21�8 GWA-278RU 650
- / ♦ \ - / \ s BB \ - / zs13 / , � \ I soa is "
I \ /—L I �\ / I ♦\ /— I \ / I \ /— I \ / I _ \ / I \ /— \ / / - \ / \ / \ / \ / - - / \ / 1 / �- �Y \I \ / Li 3.0 \ / 1
\lr.�l/ \/\ /1 \/\ m 1 \/\ /1 �/1 \/~♦,� I \/- I \/_-\-\'/\-_\ IT s g,a 1/ soa 96 a L" Q
\-♦
�
I/\
Z I ♦ / _ \ / _ \ / - \ / _ \ / - - \ \ AB-OaD - \ Li s.s ♦ - / / \ \ / I �♦'A / / / 1 / \ / \ / 1 \ I AB-DiBRDR \ / \ I
600 \/� /\J♦�\/\I/1\/\/\1/1 \/\I/1\/\/\I/1 \/\I/1\/\/\1/1 B <so /\/\ I f♦/ I \_\,./- \Y \ I L \ /-/�_1' ros 3Jz \ 1 / 8 nBR /1
/ / / / _ / / _ / soa a / 1 / 1� / \ / I ��( / - - \ ' \ _ B 397 / - 600 Z
O \ / /\-//\-/ \ - \ ' /\ \ \ / 1 / /\ / \ - \ / " I/ \ /\ / solo <1 \ \ \ � ros ua /\ \ \ i' 1 / \ / \// 1 � / / \7/ 1 � / t' \-�>_\\/ I / \\ � /\. /I / \� \ 1 / /\ Li 6.9 � - \ Li 730 / \/ / O
\ \ / I / — / / BEDROgk9b — / / / \ i \ / I / — / \ / \-_ - \ \ - \ — / / \ / _ \ \ I
\♦ / / i \ I / i \ i \ 1' \-_ \ \ / \ I soa a :�SO4 <1
_ \ / - \ \ / \ / _ _ \ / \ / \ / _ _ \ / - \�\ / \ / _ _ \ / TDS 30 \ / - \ \ / \ / / I / \ / / \ I _ \ / i \ / I / \ \ / \ \ / \ / 1 / — TDS 364 \ / I
♦,il\I/1\\/\I/1\��/\I/1\/t'�♦�I/1\��/\I/1\�4 �H�-\ I\/\/-`/I�/\�-'\�\'/\-��-1 i\-�\ \ \ IN TDS
ros 237
j j �♦ / \ \ % 1 i / \ i \ %
W 550 \ / ♦� \ \ / - / \ / \ \ - / \ / \ \ /- / \ / \ \ - / \ / \ \ / - / \ / \ \ \ �/ / v \/ \/\ /1 \ /1/ \/\ 1 \ /1/�\/ GwA-nBRL /1/ 550
J \/I/\ y\/I/\\i \/I/\mil\/I/\\i \/I/\mil\/I/\\i \/I/\mil\/I/\\i \/BEDROCK,/I/\\i \/I/\�/\/I/y�\��/I��♦ \-1'/-/\-1'/- \-\'/-/\-1'/- \-1 / B zt3 \ W
\ / - \ \ i \ / - _ \ / / - \ \ / / - - \ / \ / - \ \ / / - _ \ / \ / - \ \ i / - _ \ / \ / - \ \ / \ / - _ \ / / - \ \ i \ / I \ / 7 \ - / / _ / \ / / J
W I/1�/\/\I/1\/\/\I/1�/\/\I/1\/\/\I/1,/\/\I/1\/\/\I/1�/\/\I�i'�/\/\I/1�/\/\I/1\/\/\I/1\/ /\I \// /I!�ti/\ I \\ 9.sLu
43.5
/
/ \ SO4 21
500 TDS 348
1 / \-_ \ - \ / / •� - -
—500
\\� \/I/\il\/I/\\� \
N�\/\I/1\/\/\I/1/\/\I/1\/\/\I/1��\/\I/1\/\/\I/1,/I/\i/\\/I/\\��\\/I/\i/\\/I / MW-1ISBLIN
- \ \ / /\/ i l i l \ / I / \ i l /\/ i l i l \\/ I / \ i l /\/ _ \l i �\ / I / \ \ \ / \ / \I / 1 \ / \ / \1 / 1 \ / \ / \I / 1 Li - \ / \I / 1 \ / \ / \ I / \ \ /
/i \ I \ _ / \ I \ _ / \ I_y _\ . / - /� /�_ /� /�_ / -
450 \ FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED _ \ / / - _ \ \ / _ \ / / - _ \ / \ / - \ / / I \ / -_ \ — \ ' /\-_ \ 1 ' /\-_ \ \ ' /� - s04 1 ' /\-_ \ \ /\-_ \ - 450
/ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE /
/\ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OFTHE CROSS SECTION, AND
\NERTICALEXAGGERATION. THE ACTUAL NUMBER OFFRACTURES ISFAR TOO NUMEROUS TO//I/\\/\/I/\/\\/I/\\�/\/I/\�/\\/I/y\��\/I�\-/\ \\'//1/�-1'/-/\ \\'//1/�-\'/-/\
/ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
400 /\ ARE CONCEPTUAL ONLY.
400_J- _ \ / \ / \ / / _ \ /I \ \ \ / \ / _ \ �I \ \ \ / \ / _ \ �I \ _ 400
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
I
O
qoR
F
F�
FORMER
UNITS 1-4
ASH BASIN
ASH
1 CLIFFSIDE ` ur
_
S G
AREA
STEAM
STEAM
1 STATION v
ACTIVE I_
a
UNIT 5
Y
ASH BASIN -
J
INACTIVE
/
xti
ASH BASIN
` t�V
-.._1J:.
c� c�
\
F
Q
CcP
LANDFILL V MOCRA�q,
1 _ gogo
CROSS SECTION A -A' IS LINEAR IN NATURE AND ALL
^-- - - LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
LEGEND
GWA 25S WELL IN SHALLOW FLOW LAYER
GWA 25D WELL IN DEEP FLOW LAYER
GWA 21BR WELL IN BEDROCK FLOW LAYER
AB-6S WELL IN ASH PORE WATER
v — GENERALIZED WATER TABLE
GENERALIZED BEDROCK FRACTURE
ORIENTATION
GWA-s4BRL
B
236
GENERALIZED GROUNDWATER
Li
43.5
FLOW DIRECTION
SO4
TDS
21
348
0 ASH
ASH PORE WATER
0
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
ALLUVIUM
ASH PORE WATER ELEVATION
SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
BEDROCK GROUNDWATER ELEVATION
MEAN BORON (B) CONCENTRATION (ug/L)
MEAN LITHIUM (Li) CONCENTRATION (Ng/L)
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
WELL SCREEN
COMPLIANCE BOUNDARY
('DUKE
ENERGY
CAROLINAS
11611111
synTena
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROG RAMS PER
LITER (Ng/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS
ARE IN MILLIGRAMS PER LITER (mg/L)
WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
REPORTING UNITS Hg/L P9/L mg/L mg/L
15A NCAC 02L STANDARD 700 NE 250 Soo
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)' S0 3 4 57
BACKGROUND THRESHOLD VALUES 50 12 15 307
(TRANSITION ROW ZONE)'
BACKGROUND THRESHOLD VALUES 50 11 17 120
(BEDROCK FLOW ZONED
'-UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 201E AS SUBMITTED IN JUNE 2019.
NE - NOT ESTAB LIS FED
0 100 200 400
HORIZONTAL SCALE: 1' = 400'
VERTICAL SCALE: 1' = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 10/22/2019
REVISED BY: D. KREFSKI DATE: 10/29/2019
CHECKED BY: T. GRANT DATE:10/29/2019
APPROVED BY: S. SPINNER DATE: 10/29/2019
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-8a
GENERAL CROSS SECTION A -A'
CONSERVATIVE GROUP
MEAN OF BORON, LITHIUM, SULFATE AND TOTAL
DISSOLVED SOLIDS (TDS)
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

A - A'
(SOUTH) (NORTH)
ACTIVE ASH BASIN -
ILa In POSSIBLE RADIAL GROUNDWATER FLOW
fN tV IN THIS AREA IQn Ln N c
0
800 3 g7fJ/1N0ro ymG m 800
U ASH 00 aaaaaa aaa X 2
ABA M1A15 ASH SAPROLITE
__ WATER IN BASIN _ _
- k -j
__�_�w�rw____________ _ ____ ________________________5--- As 923 ________ ___ WATERIN BASIN 3
_- AMWS (IS
75O GWA 255 QMW-06_______ __ __ _____ As 323-________ __ U([ataO ¢OWl _-_ --____ _________ _-- As 1965 Sr 56 CCR-0aD 750
----- -- -- -- -- -- -- -- -- -- -__ ___ _ _ _____ ____-___-__ _ As al
As c0.1 As cal ___________________ Sr 2510 _______________________________ V 38.9 ________ ___ ____-__ - ______ ___________________ __ i ------ _ _____ __ _____ y
_______ _________ ___ _____
sr v ___ -__=-u(tara0 aaola =ASH PORE WATERo-===-=_- u(taap aao19 ------------------- _ \/
Sr -
36
_ _ AB-0MAIS __ _________________ U total _
SAPROLITE _-_-_--_ _ _________________________ __ ____ _ SAPROLITE V 0.7 _-_-__-_
U (total) - U (tara0 - _ As 1&1 ___ \ -
_____________________ _ __________________
- V V <0.3 ______"_ _ __ _ __ _ __ _ Sr 351 AB-¢9D==_=_-______
TRANSITION ZONE _____________ _ ___ ___ _____ U(total) 0.0001 AS o,2 As <al , ♦ / — / \ \ AS a3 m m m
/\ / \ -1'/ \ `=' v 14 I \ -i i sr az TRANSITION u(arap 51 /O \\ \♦ /I 700
700 \ i r,K I / \ i / \/ / \ / ♦ Sr 32 N N N N
\ - \ , . / , \ \ i ` / I - \ _ \ , As a19 AB,(KS . / - , I _ \/ u (taap aaom ZONE / I - \ v a3 1 �"w� \ I , , \ / \ u (taap arom Q Q Q Q
/\4 I\I Sf 29 As 1692 I \ / - I V Q3 \ / ` -�� /�-1 V a4
\ A4 � \ / \ / , , \ aa) <o.aols / 1 , / \ / \ / \ I / , / 1 / \ _ \ ' /�-- \ ALLUVIUM
<a3ASMRR - - / /, Sr 1640 \ \ / / 1 , \ // C9 C9 C9 (7 ^
\ l \ I - \ / I ♦ \l As <a1 I ♦ \/ i l \ / I ♦ \l u (cotap amw \ / I ♦ \ \ w \\ \ / \ ♦ _ BROAD RIVER QQ
. \ / '�� 1 \ / / \I / \ \ / \ / \I / \_� \I . / \ / / \ I V 45.9 I . / \ \\I / 1 \ /I / \\ \j /I \\ ` �\`//I /� 1 \ H:v r/ \ / �; i /� 1 / \ GW-- - 65T 0�
/ \ / 1 u (total) <0.0005 / \ / 1 Ae o4s , _ _ sr 93 \ / / \`I` \ \ I / 1 \ / / j / \ i l / i \ l \ ♦ Sr zoa \ L---- 650 ' 650-1'/L1,\-_\'/-\\ \�/�-/\-1 ?- v <n3 ,\-\'/:�\-\'/ As 9 /-\\ 1 /� ♦\!+(tara0aFM /1/�\ �.,, /\ , _ _\
\ l \ / I l \/ ♦ \ l \ / I / \ - l \/ K� \ / I / \ - l \/ ♦ \ l \/ ♦ \ / I / v a3 �- / \ / ♦ _ U (tota0 amB6
Sr \ I \ _ - \ - \ \' \-- \ \ / �\ GWA-21BRU \
_ \ / _L\ �� _ \ .,( - \ \ / -�+.\' / - \ \ . / - - \' . / - \ . / - / I ♦ \/� \ / / \ / I ♦ \ 1 / \I \ / \P s az As <a1
Bmmt \ \\ `Y r 256 1\ ♦ v 6z sr
ram- / / \a�l/1/ \/\ // �i /``/ �`/ _ara0 - , �/ �� - 1'/.-_�— (tota0 <0.
�i \/�rl I_\/i \/I♦\�� I_\/i \/I♦\/�� I-�/i \/I♦\/�� I/\/�� -r 105 I♦\ �S' \/- I \, I / .. 5� Z
All -All-\ / - / _ \ CA \ I AB-OIBIBDR 1 \ I
600 \/\I/,J� /\I \ /\/\I/1\ / /\I \ /_\/\I/1\ / /\ \/\ /1 Sr \/\ V i / �Y►Y \ I \� / / - _�\ \ 1 Sr 268 GWA-21BR \ �i
/ / / \ 11 / / / �\ / \ i \ I _
As e¢i / -
-1'/- -1' u(tota0 - \ ♦ 0
0 \- / / - / \ BEDROC(C!. - / \ \- / / - / \ \- / / v <n3 \- / / / - / \ .-_ \ ' /\-_ \ - \ ' /�-_ / - \ \ ♦ / - _ \ / - \' \ - / v a.7 / \ \ / I _
♦� I/\♦ \/I/\�� I i \/\i� I \i \rf1\ \ l / ♦ l \ \/_- I \/ I \/-\ i�/I- \7� ��•�U(tota0< ♦�/
I/1\�\/� /1,�\1►aI/1\/\/� I/1\/\/� I/1\/��a� I/\`/4,(/\I \/-\ I./\/--\-1'-�- \ /1, \/\„/
/\/1
/��/��-1 `.- 1 /�� -1 `.- 1 /� �1 �\ /1,\/\/1 /17\�/ / / /� \/I♦\\ -I Y \-, �/�--\-2�/1-�, 1�/�-- \Q
\i♦j� '� �a \i\%1 iI \i\j�''� iI \i\%j �'� iI \i\"/1 J / /-1 I \ ♦�/-l'i T' ♦�/-,I_'♦�/- /
W550 /�-'�-�'/\\��\-/\-1'/\\\ �-♦�►ral'/�\\,�/\-1'/\\\`-♦\-1'/\\\,`-♦\-1'/\\\\�/\\,\/\11.\./\/\I \/ 11i\\/\I/1\�/I/1��\/\I/1\/ 550W
J \/I/\ N\/I♦\\�� /I/\�/\/I/\\�� /I/\�/\/I/\\�� /I/\�/\/I/\\�� /BEDROCK,
As as As 114J \ - / \ ♦ J
\I \I \I \I \I , i / \ / I / \\� Sr 436 ' \ / I \ \ / I / \
LJJ /1, \/\/1, \ /1, \/\/\, \ /1, \/\/1, \ /1, \/\/tom^,\ /\/ \/\/1,�\ /1, \/\/1/-\'/\-_� /- /--\' / _\ sr z67 /-_��'�/- W
total u
<n3 it \/ U(total) <o.o00z \I
v ¢3
500 I / 1 / \ / \ I / 1 \ / \ / \ I / 1 \ / \ I / \ \ / \ / \I / 1 \ / \ I / 1 \ / \ / \ I / 1 \ / \ I / 1 \ / \ / \ I / \ \ / \I / 1 \ / \ / \ I / 1 \ / \ I / 1 \ /� \ / \ / 1 ///I \/ i �\ \ I ♦ \/ \ / I \l i l \ / I \ l i \ / I / \/ i l \ / I ♦ \l i \ / I / \
500
\� /I / \\� i / I ♦ \_ \ /I / \\� i / I ♦ \_ \ /I / \\� i / I ♦ \_ \ /I / \\� i / I ♦ \— /I / \\� i / I ♦ \_ \ /I \ ♦ / ♦ \ ♦BRL
\ / As
Sr
\�- �_--; �_ \-1/\'- \ \/\�- \-i�/\�-i lil\\/ I \ it/\/ i lil\\/ I \ it/\/-� \li �\ / I♦ \ 1\ /\%\I/1\ /\%\I/1\ / \%\I/1\ u
.FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED / 1 \ _ / \ I _ \ _ / \ I - y _ \ . __/ _ / __/ _ / (total)
_ _ / __/
450 I /ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE \ / \I, / /\I / 1 / �/ I ♦ \ i / \�/ I / l i l \\/ /�/ / v \ i l /�/ l \\/ I \ 450
/ ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND
\ 'VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO \� / I / \ \ /I \\� / I / \ ` /I \\� / I ♦ y \ / - \ - \ /\ \ \ \ /\-, \ - \' /\ \ \ \ /� , \ - ,' /\ \ \ \
/ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
400
ARE CONCEPTUAL ONLY.-\'./.-\'\i/\--\�\'./.-\-li/�-\-\'./.-�\ v�l�\/-,
---
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
LEGEND CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2' ARSENIC (As),6j111111 (a`WA_5S WELL IN SHALLOW FLOW LAYER ASH PORE WATER ELEVATION CONCENTRATIONS AREErTIUM IN MICROGRAMS PER LITER (u9/(Sr), TOTAL URANIUM (U), L). VANADIUM (V)
�FR WELL IN DEEP FLOW LAYER
GWA-25D � *WELLS WITH DATAS ETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
WELL IN BEDROCK FLOW LAYER SHALLOW GROUNDWATER ELEVATION MOST RECENT VALID SAMPLE DATA UP TO TUNE 2019 WAS USED.
GWA-21BR - NO DATA AVAILABLE
FORMER Q AB 6S WELL IN ASH PORE WATER V DEEP GROUNDWATER ELEVATION ANALYTICAL PARAMETER As Sr U V
UNITS 1-4
ASH BASIN
ASH REPORTING UNITS ua/L ua/L ua/L ua/L
CE STEAM
STATION v -
UNIT 5
INACTIVE
/ r
' V
ASH BASIN
!c9
\
% I
NOTE:
CROSS SECTION A -A' IS LINEAR IN NATURE AND ALL
^-- - - - LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
- - - - GENERALIZED WATER TABLE
GENERALIZED BEDROCK FRACTURE
ORIENTATION
GWA-WRL
GENERALIZED GROUNDWATER
As
0.6
FLOW DIRECTION
URarep
aroII
V
10.3
ASH
ASH PORE WATER
® FILL
0
SAPROLITE
- - -
® TRANSITION ZONE
BEDROCK
ALLUVIUM
BEDROCK GROUNDWATER ELEVATION
MEAN ARSENIC (AS) CONCENTRATION (ug/L)
MEAN STRONTIUM (Sr) CONCENTRATION (Ng/L)
MEAN TOTAL URANIUM (U) CONCENTRATION (Ng/L)
MEAN VANADIUM (V) CONCENTRATION (ug/L)
WELL SCREEN
COMPLIANCE BOUNDARY
('DUKE
ENERGY
CAROLI NAS
41
synTena
15A NCAC 02L STANDARD 10 NE NE 3* 1
(SHALLOW FLOW ZONE)l 0.2 34 0.0005 1
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)i 2 69 0.0005 11
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)i 1 93 0.0005 1
* - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1-UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
0 100 200 400
HORIZONTAL SCALE: V = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 1
REVISED BY: D. KREFSKI DATE: 1
CHECKED BY: T. GRANT DATE: 1
APPROVED BY: S. SPINNER DATE: 1
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-8b I
GENERAL CROSS SECTION A -A'
NON -CONSERVATIVE GROUP
MEAN OF ARSENIC, STRONTIUM, TOTAL URANIUM
AND VANADIUM
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

A - A'
(SOUTH) (NORTH)
ACTIVE ASH BASIN -
L o n POSSIBLE RADIAL GROUNDWATER FLOW
M fV IN THIS AREA n N c
Boo �� 3 cmw Y q�a-e rn�o 3� w hom Boo
mmm mmmmma a
mmm 0
ASR aaaaaaa 0
WATER IN BASIN AITWAIs ASH SAPROLITE
-F_-e__-_-_-5_1__6-_1_ _----______-____- _____-__ -____-_- -__--_--____-
_-
___
31Q1396la7
__1 I♦ / / \_\/_ ;
_
-_
1
J =
750
o
_
Mn 46-ASH PORE WATERMn165 TI SAPROLITE43l-__-__-__ TI B IN WATERINBASIN
750 _o
___ Fe
Ag_Dgp - � \ / \
700 D6 Fe 1 TRANSITION I / ; Fe 193 \ it TI ♦ / al N N N N 700
,_ FILL
AB ouL / - � . AB-0ls aaa a
Mn 25M1 \ /
\I TI al \ /`-- \ \ Co 6R6 ALLUVIUM
i► 1�/♦ ��\ /♦--\�L�/. , ♦ - ♦-_ //� Fe 97 /4�-1 / ,/-/\ /- /-\�/\i Fe 1478 �0�a i�
TI <Ql AB-06BR I/\///\/I/\// \ Mn 9 / /\/ i 7'o \// \/I/\\ \\/_/ ` / _\' \ \\ `/ r \/ _
_ ♦ \ / - _ \ \ 1 - ♦ co <al / \ ` TI <0.1 • / - \ \ / \ / / I / \ / \ / \ Mn T5 BROAD RIVER QQ
\/��/1/�\/\I/\\/\/\I/1/��%\I/ Fe 4214 1/�\/\I/1`L�/\I. /\♦/ \I/1 A \/- _\/\/♦�\\i\/r,__\_\�/- \-\'/ TI as Co WA-bS6 % -657' 00
00
650 -_\ ' / \ - 1 r Mn ® - \ ' ~\ - / - _ co az ` / M` / I ♦ / / \ Fe 7t 650 '
CLI
- \ \ i \ \ / I - \ \ i / I f O1D 71 Q3 \ _ \ ! Fe <50 \ - \ i \ / I - Mn 91 \ / I / \ / / \ / I \/ i l \ / I / \ 1 \ / / \ I ♦ /� - \
4j\/\I/1//\�I/���`\/\I/���.\/\I/1♦/LT�I 1♦ / /\I ♦/ /\I Mn <s \ ♦ / \I ♦ / TI <. \ / - \�\ / \i \ / - _ /�\ /\/�\�Y AB - \I 1\ / GWA-218R.0 /
A&1./i/\li\/-� Fe 9187! / Fe 516 \
Ae-07D / I / \/ co t. i \� I \\ ♦ y ♦ / - I \ / / \ / / �/.
/ Mn 2317 i Mn 168 S
/ \ _ / \ / \ / \I Co 5.3 \ / Fe ll847 I / I / \ i I �Y►Y \ TI <0.1 \I 1 _ TI 0.1
600 \ / 1 J� \ / \ I / 1 ♦ / \ I / 1 \ / \ I / 1 ♦ / \ I / 1 \ / \ / 1 \ Fe 55 / 1 _\ Mn 1S / \ / 1 / - _ \ \ / \ t� / _ \ - \ / - \ 1 ' Co 3.8 / 600
1 \ \ / - \ ' / \ - GWA-21BR O
O //\ \ \ / \ / /♦ / \ - \ ' /\ \ \ \ / / Mn 180 1 \ \ / TI <0.1 \ / /\ \ \ % 1 / / \ / \ / 1 / Y�r\ ��� \ / I / \` i\` /I \\ \ — / \ Mn 1555 / Co Q4
\\/I/\/\/I BEDROC)i'1.�\ i/\/I/\\�� /I/\� /\/I/\\rl cal ^{/\`i \/ I/\ rfl\`-_\ `/'\`--\ /\/� `/I`/\/ -\I �\ ! Fe 3630 I
�F 1 i \,Ay ` ` I ` ;1 / �`� 1 `` _\ ; \ / 1 / I i \/ i l I \l l \ I i \l \ \1 �Y� 1 c \ , ; \ M
W 550 /\-�•L. 1'/%1; \/n 410
\%1; \ -; \/ \�/\ %\ \%�; \ 1� \� \'/� / \ -1'/ -� \ -\ //\ \ \ 1�/\%\I �^ .\%\I/1\\%\I \♦ ,\i\I/1��\% /♦ I 1�� 550 W
BEDROCK/I/\♦�/\/I/\�/\\/I/ GWAfiOBRL-/\-1'/- \-1 / Co azCo al \
W //\/\I/\♦/\/\I/1//\/\I/1`/\/\I/1//\/\I�'/���/\/\I/\//\/\I/1♦/\/\I/1//\/\I/1♦/�\/\/1/ Fe w7s /I \ /I/\\' Fe 3520 I/\ I.I.I
-\/`/ / \ l ` -\ l/�/ / 1 / ` -\ l / / 1 / ` -\ l / / \ l ` -\ l / i—\ l/` -\ \lil\ / I/ \ 1 /♦I `/ /\I Mn s76 ♦/ /\I \/_— \/-
\\/I-\/�i
500 I / 1 / \ / \I / 1 ♦ / \ / \I / 1 \ / \I / 1 ♦ / \ / \I / 1 , \ / \I / 1 ♦ / \ / \I / 1 \ / \I / 1 ♦ / \ / \ I / 1 \ / \I / 1 ♦ / \ / \I / 1 \ / \I / 1 ♦ /� \ / \ / 1 ///I \/ i �\ / I / \/ ` /I \/ i \ / I \ l i \ /I , \l i\ / I / \/ i /I , 500
/1,//\I/1♦\/\I/1,//\I/\��\/\I/1,//\I/1♦\/\I/1///\I/1\I/1\I/1♦\/\�/1////I/\`�i\/I�\\i �\\/I / NRN-uBRL \\�/\\/I/\♦_��\./I/\
` /\-/`-- \-1 I/\-\`/it\`/it\/ /\`/ I/ \ 1// \/`I/1\ /\/\I/1\/\I/ 1� Co _ \/\I/1♦ /\i\I/1`/
450 Fe
\FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED - \ /I \ / \ _ \ �I \ / \ / - \ /I \ / ♦ _ \ �I \ / ♦ / - ♦ / \ / \ /` \ / \I / 1 \ / _ \ /`-- \ \ /\-- \ \ ' /\-- Mn \ ' /♦-- \ 1 / /` - \ - 450
/ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE \ / \ / 1 \ / \ / \ / \ / \ / 1 \ / \ / 1 / \ / \I / 1 / I _ \/ \ / I / \/ \ / I \/ / \ / I \/ / \ / I / \/ \ / I / \
ORIENTATIONSACCOUNTFORAPPARENTDIPWITHINTHEPLANEOFTHECROSSSECTION,AND -` //\/\ \ 1`/_-\I/;♦/��\I/�\/-�\I`/♦� \rl\ /1//��\I�1♦�\�\I/�%/_
\ VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO / \\/ I / \� / \ / I / \ / / I / \� / \ / I \ / \\/ I / \\ \ /I - \- / \ \ / - / \ ' /
/ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH I j ♦ / j \ I / 1 ` / \ I \ / ♦ / j \ I / 1 ` / \ I \ / \ i \ / \ I / 1 �/ I / \ / \\/ I / \` i l \�/ I / \ l \ /
400 /\A RE CONCEPTUAL ONLY. _/-/ \�/`-/� \/-\�/� i\ \/i1�//\ _\ /\/�`� _\/I./♦�\\/\/� _\/I\/♦�\\� _\/I./\�_ 400
6gOgoR 11FR
FORMER
UNITS 1-4
ASH BASIN
CLIFFSIDE
r
STEAM
STATION
v
UNIT 5
INACTIVE
/ r
ASH BASIN
\`
ASH
STORAGE
AREA
ACTIVE
ASH BASIN
(
NOTE:
CROSS SECTION A -A' IS LINEAR IN NATURE AND ALL
^-- - - - LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
LEGEND
GWA 25S WELL IN SHALLOW FLOW LAYER
GWA 25D WELL IN DEEP FLOW LAYER
GWA 21BR WELL IN BEDROCK FLOW LAYER
AB 6S WELL IN ASH PORE WATER
• — GENERALIZED WATER TABLE
�...� GENERALIZED BEDROCK FRACTURE
ORIENTATION
GENERALIZED GROUNDWATER
FLOW DIRECTION
0 ASH
ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
ALLUVIUM
V
ASH PORE WATER ELEVATION
V
SHALLOW GROUNDWATER ELEVATION
V
DEEP GROUNDWATER ELEVATION
V
BEDROCK GROUNDWATER ELEVATION
GWA-MBla
MEAN COBALT (Co) CONCENTRATION (ug/L)
Fe ss7s
MEAN IRON (Fe) CONCENTRATION (ug/L)
Mn s76
MEAN MANGANESE (Mn) CONCENTRATION (Ng/L)
rI o.l
MEAN THALLIUM (TI) CONCENTRATION (ug/L)
WELLSCREEN
r
COMPLIANCE BOUNDARY
t
DUKE
ENERGY
CAROLI NAS
41
synTena
,1LB51*3
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2. COBALT (Co), IRON (Fe), MANGANESE (Mn), AND THALLIUM (7I)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Co Fe Mn T1
REPORTING UNITS Pg/L Pg/L Pg/L Pg/L
1SA NCAC 02L STANDARD 1* 300 SO 0.2*
BACKGROUND THRESHOLD VALUES 21 1700 760 760
(SHALLOW FLOW ZONE),
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE), S 1840 760 760
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE), 2 7680 232 232
* - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1-UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 1
REVISED BY: D. KREFSKI DATE: 1
CHECKED BY: T. GRANT DATE: 1
APPROVED BY: S. SPINNER DATE: 1
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-8c
GENERAL CROSS SECTION A -A'
VARIABLE GROUP
MEAN OF COBALT, IRON, MANGANESE,
AND THALLIUM
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

FORMER
,�►'�,. ` UNITS 1-4
ASH BASIN
ecy
CLIFFSIDE\ Y ' SIOR \GE
al STEAM �u ARI A
STATION ' "P" ACTIVE
n¢ Jh UNIT 5 ASH BASIN
ASH BAISIN
0
CCP
p'
LANDFILL MOCRq
ROgO
NOTE:
CROSS SECTION J-Y IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
-- - PROJECTED ONTO THE CROSS SECTION.
J- 00- -J'
(SOUTH) toASH STORAGE AREA _ (NORTH)
o Coll
as
,
3 '
800
v
FILL �
,
,
,
,
,
,
_______
--- ______=-_ASH________ _
FILL h I
75U SAPROLITE------------- a
_ ______-
7 _____=ASH______ y0'm
QMW-01 _ _ _ _ _ _
B 1420 __
Li L2 _ _ _ _
SO4 111
� TDS 318 � AS-01S___
� � B FILL I
B 1196 ___________ _____
0 Li 83
773
Q \ 504 537 __- -ASH ` _-- _ -` -ASH =-
TRANSITION - PORE -
ZONE TDS 537 -WATER -
/ AS-01D
Z 700 I B 672 B AS'815447 ALLUVIUM
O \ / Li Z5
\ / \ SO4 56 SO4 85- B 147
167
TDS i SO4 2g 'it,
AS 075
247
W
W /� — B 49 SAPROLITE
\ / Li 49 504 31515
504 209 A�O80 TDS 594
TDS 447 B 798 BROAD RIVER
Li 3.8 657'
�� 185.
650 \ � / _ \ / I B; 83; _
/ / B AS-M
/ TDS 305 \ 28. TRANSITION
/BAS-= EDROCK? — \ / _ B 43 \ \ Li 78.5 ZONE
B -078R 72 \ / I 504 217
463
SO4 71 � � ' _TDS 463
TDS 268
504 40
TDS 166
CROSS SECTION DOES NOT INCLUDE A BEDROCK \ / - - \ \ / B
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA / \ I B;4 /
600 CAN BE USED TO DETERMINE GENERALIZED FRACTURE I a / SO4 97 I
ORIENTATION. _ / - \ / / BEDROCK
� 7
LEGEND
GWA 25S WELL IN SHALLOW LAYER V ASH PORE WATER ELEVATION
GWA-25D WELL IN DEEP LAYER
GWA 21BR WELL IN BEDROCK LAYER V SHALLOW GROUNDWATER ELEVATION
AB 6S WELL IN ASH PORE WATER
DEEP GROUNDWATER ELEVATION
GENERALIZED WATER TABLE V BEDROCK GROUNDWATER ELEVATION
-� GENERALIZED GROUNDWATER
FLOW DIRECTION As,07111113 MEAN BORON (B) CONCENTRATION (ug/L)
B 72 MEAN LITHIUM (Li) CONCENTRATION (ug/L)
0 ASH Li 3.8 MEAN SULFATE (SO4) CONCENTRATION (mg/L)
ASH PORE WATER TDS 16 MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
® FILL
SAPROLITE WELL SCREEN
® TRANSITION ZONE
COMPLIANCE BOUNDARY
BEDROCK DUKE 0 60 120
ALLUVIUM `' HORIZONTr A
800
750
OD
CO
a
Z
700 Z
O
Lu
J
w
650
NOTES:
600 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2. BORON (B) AND LITHIUM (U) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (Ug/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS
ARE IN MILLIGRAMS PER LITER (mg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
REPORTING UNITS Pg/L Pg/L
mg/L
mg/L
15A NCAC 02L STANDARD 700 NE
250
500
BACKGROUND THRESHOLD VALUES
50 3
(SHALLOW FLOW ZONE)'
4
57
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE) 50 12
15
107
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)50 11
17
120
'-UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED
USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
NE - NOT ESTABLISHED
CROSS SECTION LOCATION

J =
(SOUTH)
r
800 -J
V
750
ASH STORAGE AREA
0g..
r m
II
��■■■lii
�■■Ilni�i■■
■
Ip�
1I
0�
®®
III
•
� II
III
.iI
o�
/ \ SAPROUTE
\ / \ / \ / — As 3.9
iv
(NORTH)
800
750
(total) O.W 32 Ash �00.5 BROAD SRIVER
/ Sr 0.5
650 As \ \ \ / / As-O7o D (toc(total)650
/ / 250.V '
%BEDROCK/ — \ \ <0.3. — \ / \ Sr 533 TR ZONEION
As 0.6 133 U(tatal) <0.0005
(tatSr ap 0. 0044 / \ V OJ
V 1.0
AAsa 16 aA
Rsr �/ — /2.0CROSS SECTION DOES NOT INCLUDE A BEDROCK \ u(totap o.0040 6`00 EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA V 0.e \ o.0016 6U0 NOTES:
CAN BE USED TO DETERMINE GENERALIZED FRACTURE BEDROCK i / 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
ORIENTATION. — � — 1
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
LEGEND TO JUNE 2019.
GWA 25S WELL IN SHALLOW LAYER ASH PORE WATER ELEVATION 2. ARSENIC (As), STRONTIUM (Sr), TOTAL URANIUM (U), AND VANADIUM (V)
B - CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L).
ROAOHi�F GWA-25D WELL IN DEEP LAYER *WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
RI - SHALLOW GROUNDWATER ELEVATION MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
�` GWA 21BR WELL IN BEDROCK LAYER
NO DATA AVAILABLE
WELL IN ASH PORE WATER
£ \, FORME AB 6S DEEP GROUNDWATER ELEVATION ANALYTICAL PARAMETER As Sr u v
,.► '�, UNITS 14 \ ',' REPORTING UNITS
ASH BASIN . pg/L pg/L pg/L pg/L
AqH — GENERALIZED WATER TABLE
1 r �y'S10R \GE BEDROCK GROUNDWATER ELEVATION 15A NCAC 02L STANDARD 10 NE NE 3*
CLIFFSIDE\ Y
•; STEAM \ aRIA GENERALIZED GROUNDWATER aso�exa BACKGROUND THRESHOLD VALUES
0.2 34 0.0005 1
STATION iv ACTIVE �� MEAN ARSENIC As CONCENTRATION g/L
UNIT5 r ASH BASIN FLOW DIRECTION As 1.6 ( ) (IJ6� ) (SHALLOW FLOW ZONE)1
3a wacnvE �� ' sr 78 MEAN STRONTIUM (Sr) CONCENTRATION (Ng/L) BACKGROUND THRESHOLD VALUES
ASH BASIN �,;:�- ASH u (total) o.004o MEAN TOTAL URANIUM (U) CONCENTRATION (ug/L) (TRANSITION FLOW ZONE)' z 69 0.0005 11
\ v o.s MEAN VANADIUM (V) CONCENTRATION (Ng/L) BACKGROUND THRESHOLD VALUES
rt- OG� WRI�- \ ' ASH PORE WATER (BEDROCK FLOW ZONE)' 1 93 0.0005 1
F
FILL WELL SCREEN * - IMAC OFTHE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 - UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
SAPROLITE DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
CP Mcc q ® TRANSITION ZONE — — — COMPLIANCE BOUNDARY 2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
q�.
BEDROCK DUKE 0 60 120 240 FIGURE 6-9b
` GENERAL CROSS SECTION J-X
G ENERY HORIZONTAL SCALE: 9" = 240'
NOTE: � ALLUVIUM VERTICAL SCALE: 1"=a6' NON -CONSERVATIVE GROUP
CROSS SECTION J-Y IS LINEAR IN NATURE AND ALL 5X VERTICAL EXAGGERATION
LOCATIONS NOT ALONG THE CROSS SECTION ARE CAROLINAS DRAWN BY: I. CHASTAIN DATE: 10/3/2019 MEAN OF ARSENIC, STRONTIUM, TOTAL URANIUM
--~ PROJECTED ONTO THE CROSS SECTION. REVISED BY: D. KREFSKI DATE:10/30/2019 AND VANADIUM
CROSS SECTION LOCATION �� CHECKED BY: GRANT R DATE:10/30/2019 ACTIVE ASH BASIN
APPROVED BY: S. SPINNER DATE: 10/30/2019 CORRECTIVE ACTION PLAN UPDATE

£ \, FORMER
••i'`;'�► ` "'�,_,'= ` UNITS I-4
I ` ASH BASIN
�cH
' / M SIOR\GE
1 CLIFFSIDE\ ARIA I-
`� STEAM \
1 STATION ' c� ACTT
UNIT ASH BASIN ASH BAISIN ' 1JCCP
O
LANDFILL OCR.
NOTE:
CROSS SECTION J-J' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
-- - PROJECTED ONTO THE CROSS SECTION.
J - - 11
(SOUTH) ASH STORAGE AREA (NORTH)
m
� � I
N
as
3
800 800
FILL �
I
------------
I
I
I
I
________=-_ASH________ _
750 SAPROLITE _-_ --_ --_ --_ -_ _ _ _ a a
750
_____=ASH —____ NmOm
CIMW-01 ______________
o
F_ _ _ _ _ _ _ _ _
M. 224 _ _ _
Mn 213
TI 0.5
00 AS.am _____________ FILL
0 CO 14.5 _ _
Fe 222 ASH `-_-�_ _� _ _ _ _ _ ASH_ N N N
a TRANSITION Mn 913
PORE
ZONE TI 0.6 - WATER
/ _ AS-07S
Z — Co700
Co 3.5 = - _` -`y- a
O 700 \ I — Fe 157 Fe 14176 - ALLUVIUM
Mn 291 Mn 12196
TI 13 Co 24
AS-07I Fe 4414 It
W \ \ / Co 15.5 Fe 3913 Mn 2923 AS-025
TI Q2 `�� Co ill,
/ / / Mn 6477 SAPROLITE `�
Fe <50
Lu
I M n 9650
Cow �D8.2 BROAD RIVER
AS-07D Fe 4310 - 657'
Co 0.3Fe Mn 4%8
650 / _ \ ` Mn i%o <al 650
COAS 02DQ5
/BEDROCK? — \ / \ / _ CAS-OB Q2 \ Fe 286 TRAZONEION
\ I Mn 471
C. U.3 \ \ / \ Mn 44 TI
� — Mn 24 \
CROSS SECTION DOES NOT INCLUDE A BEDROCKCo al
600 EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA 1 \ I 1 Mn 363 / \ 600
CAN BE USED TO DETERMINE GENERALIZED FRACTURE i TI <al
ORIENTATION. — — 1 BEDROCK
LEGEND
G A-25SI WELL IN SHALLOW LAYER V ASH PORE WATER ELEVATION
GWA-25D WELL IN DEEP LAYER
GWA 21BR WELL IN BEDROCK LAYER _y SHALLOW GROUNDWATER ELEVATION
AB 6S WELL IN ASH PORE WATER
DEEP GROUNDWATER ELEVATION
GENERALIZED WATER TABLE
BEDROCK GROUNDWATER ELEVATION
GENERALIZED GROUNDWATER
—� FLOW DIRECTION CoAS-PB 07RMEAN COBALT (Co) CONCENTRATION (pg/L)
© ASH MEAN IRON (Fe) CONCENTRATION (ug/L)
Mn 24 MEAN MANGANESE (Mn) CONCENTRATION (ug/L)
ASH PORE WATER TI <0.1 MEAN THALLIUM (TI) CONCENTRATION (Ng/L)
® FILL
SAPROLITE WELL SCREEN
® TRANSITION ZONE COMPLIANCE BOUNDARY
BEDROCK Cf' DUKE o 60 120 240
ALLUVIUM
r K I r r►^%i HORIZONTAL SCALE: 1" = 240'
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2. COBALT (Co), IRON (Fe), MANGANESE (Mn), AND THALLIUM (TI)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Pg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Co Fe Mn TI
REPORTING UNITS Pg/L Ug/L ug/L Ug/L
15A NCAC 02L STANDARD 1* 300 50 0.2*
BACKGROUND THRESHOLD VALUES 21 1700 760 760
(SHALLOW FLOW ZONE)1
BACKGROUND THRESHOLD VALUES 5 1840 760 760
(TRANSITION FLOW ZONE)'
BACKGROUND THRESHOLD VALUES 2 7680 232 232
(BEDROCK FLOW ZONEV
* - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 - UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
CROSS SECTION LOCATION

800
750
Z 700
0
Q
>
W
J
W
650
K
(WEST)
GWA-STS
B <
Li
600 9
Tos
GWA-5711W
B 7fl
35
saa ]6
TCS 49
fA C m G
3 i i i
V' C9 C7
GwA,�s ----3
6 550
T-
GWA
GWAA3S
B
5B
e
7fl9
WMSBBRU
242
Li
B
50
StM
106
sw
aaa
4.
TD5
2]8 1
TOB
916
504
260
/
^
\ TDS
50]
\I ♦�
GW
-
,
Li
215
I
/
GWA-ffiBR
TDS
253
\
B � GWA-S)BR \I
-
TD9
600
GWA-5ffi
SUCK
CREEK
NA
ACTIVE ASH BASIN -
Q GROUNDWATER FLOW IS PERPENDICULAR TO
CROSS SECTION IN THIS AREA
DOD 0
m_tn N00 r2 I
MMch M M � I
O m I
__ FILL NIA
mmm FILL mmmm =_- ---- =_' _- _ __-= C(Am(Ag
-ASH --- - -_ - =-AL-,
_- - -------- _____________________FILL-: __ ______________________________________15
-_ -_ -_ -_ -___ -
- --- --- ----- ------ -- __ _ ___ ___ ___ ___ _�__ SAPROLITE
--------------------
---------------------------------------------------- ------------------------------------------------
-------- - ---------------------
__________ _ __________________________ __________________________________________i Li 141 mac____ ___________________A��______________________________________________ AB-04S - ________________________
_= _ _ _______ __-_--�+'_ -`3 - - - - - - - - - - --- -- --- e - _-_-___ __-_-- -_-_- -_- -_-__ - ASH PORE WATER -___ - -__ _ -__
__________________ _ AB-M _____ �� _ - - ----------__--_________________________-- Li 119 ___ _ _ T.
4]0 ______________________ 8 <50
_____________________ ABG3MA15 ___
-L------------------------------ -- B 436o ---- soa 3ffi - _-_-_- a 17BB--_____-_�____ --_--- ----_ -_-_____--_-_ ASH PORE WATER ------- soa 3.z
AB O45L TIM 45.0
I SO4 I 924 1
WIWA-_
\ /
GWA-mBR
e
1
zss
2].]
soa
az4
GWA35'R
B
380
/
GWA-586R
e
Li
366
LL
��T
Li
504
-
-
504
TDs
u.0
124 \
342
TDs
-
/
K'
(EAST)
_-_-==-- ASH_POREWATER - ==-- _- TDS lws ---- - ---- Tos 3z7 B 1so6 ---- -- -------==---==---==---__ /
__- - ---- a sss Asa4Ass=-_-�__= TRANSITION'
\ ZONE
ABozs=_-==_--==_--==_--___--__-_-_- - - - - - soa 31.1 B---==_--==-�__-�__ / 1 /
--------- --- SAPROLITE ros m U 14.5 =-_-- __-- - / \ GWA-246R
Li 28 A&04D SD4 14 _________ -
504 z4.0 U 398 Li 7fi_ / \ \ \ B 29
ros 1za AenBl SAPROLITE so4 b5.7 L; 3.9
Li zs
TRANSITION ZONE B so AB031 r SO4 1 / - - _ _ _ \ \ / \ / -7.TDs sz1 /
Li 1.8 B 49.5 TDs 30.3 -_ _ - /
AB-02D s04 23.6 Li
Tos m1 _ / TRANSITION
e 5.3 / soa z.fl _ / 1 -ZONE Li 15.3 / \ - 1 / ' AB-OBBRU TDs ]0.0 / \ \ 1 I/ / \
s04 49.7 B 43B / / / - I / �' I / / /�
TDS 2s9 \ I \ / \ I \
as \
1 \ it - ♦ 1 I I \ / 7 e.. 6B.0/\•/1\ �\ I/1\ ti\/��I/1 N.
\I✓1\\/\�/1\ �i\/\I/il
IF-- \ // - ABG86R / • - \ i / 1 TDs \ 1/ - - 1 I / 1 - \ / - soa s6 7 \ BEDROCK i
BEDROCK ♦ \ e 336 \ / r _ I \ • _ T. 1m
\/ 8.0 \ / I ♦ \ / i/ / /� \i/ I \/ \/ f\\� / \ /
slio Ds 12.9 I� \ / I \ \� / I. / -I \ / j BEDROCK\ \// \ / - \ / % I \ - - \ i
1.8 ( I \ / I- T \ / ♦ I I \ f - I \ / I \ / - I \ / ~♦Y♦, 11, \ / - \ I \ / y / `k .
504 53.3 \ /��•� / 1 �/ �, / / ��\ / / 1 / 1 / \ /I�\ / 1 \ / / �� / \ / \ ,FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
TDS , z9z 1 h,` \ - } \ �} - - \ / - - - / - / / ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND
II / \ / / l \ / I I /* l / \ I/ 1 / / / l e 46.0
Y, I \ / / \ VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR T00 NUMEROUS TO
\ �% Li - \ / \ / - \ / \ / _ \ ;I 'ILLUSTRATE AT THIS SCALE. IN ADDITION,THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH
T� SO4\ / - \ \ / - ARE CONCEPTUAL ONLY.
800
750
700 Z
650
600
0
Q
W
J
W
LEGEND
'�♦ \ / \ / - \ /� C \ / \ I \ �� GWA fifi6RL / �/ WELL IN SHALLOW LAYER ASH PORE WATER ELEVATION
j♦�I �♦ / i \ B 463 \1 GWA 58S ASH
500 \ / /J / �� / /; - - ,� 7s.8 \ -i 1 GWA 58D WELL IN DEEP LAYER ASH PORE WATER NOTES:
_ 504 17.5
\I TO5 292 / / / FILL WELL IN BEDROCK LAYER SHALLOW GROUNDWATER ELEVATION
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
4 I / \ / / v w -Ir / �\ / - _ \ / / - _ \ GWA-58BR ® CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
WELL IN ASH PORE WATER
SAPROLITE � DEEP GROUNDWATER ELEVATION TO JUNE 2019.
woo/ - GENERALIZED WATER TABLE ® TRANSITION ZONE 2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
BEDROCK GROUNDWATER ELEVATION LITER (pg/L)
�/ \ \ \ % / ��y / / \ / I /♦♦, / \\/ 1 / \\ / / _ _ _ GENERALIZED BEDROCK FRACTURE BEDROCK 3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS
/ \ / I / \ �'♦♦ - \ / \ / \♦ \ / \ / - _ \ ORIENTATION ABa4BR MEAN BORON (B) CONCENTRATION (ug/L) ARE IN MILLIGRAMS PER LITER (mg/L)
450 �_ \ / \ / - - \ I / \ / \ I / 1 \ / \ I / \ \ \ / GENERALIZED GROUNDWATER s sa MEAN LITHIUM (Li) CONCENTRATION (ug/L)
FLOW DIRECTION soa 3.6 MEAN SULFATE (SO4) CONCENTRATION (mg/L) WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
TDS lm MEAN TOTAL DISSOLVED SOLIDS (TDS) MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
CONCENTRATION (mg/L) - NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
WELL SCREEN REPORTING UNITS pg/L pg/L mg/L mg/L
Y
15A NCAC 02L STANDARD 700 NE 250 500
FORMER - - - COMPLIANCE BOUNDARY BACKGROUND THRESHOLD VALUES 50 3 4 57
400 UNITS 1-4 (SHALLOW FLOW ZONE)
ASH BASIN BACKGROUND THRESHOLD VALUES
I ASH NA NOT AVAILABLE OR NOT MEASURED (TRANSITION FLOW ZONE)' so 12 15 107
CLIFFSIDE �_ K'STORAGE BACKGROUND THRESHOLD VALUES
STEAM AREA
1 so u v 1zo
STATION 'c, ACTIVE �� BREAKLINE (BEDROCK FLOW ZONE)
UNIT ASH BAST" INACTIVE '- UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
ASH SIN
BAK
_ - DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
I 2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
_ \ /I \ / \ - \ I \ \ / \ I ♦�♦ 1 \ \ �,\ I / 1 \ \ \ / �G, i - �`; \ NE - NOT ESTABLISHED
350
LANoFI - MccRgwRo_.� DUKE o so 1zo zao FIGURE 6-10a
HORIZONTAL SCALE: 1°=z40 GENERAL CROSS SECTION K-K'
ENERGY VERTICALSCA EXAGGERATION CONSERVATIVE GROUP
NOTE: CAROLINAS DRAWN BY:J.CHASTAIN DATE:10/22/2019 MEAN OF BORON, LITHIUM, SULFATE AND TOTAL
\ gW�ffi, / \ I \ / \ / CROSS SECTION K-K'ISLINEAR INNATURE AND ALL
300 REVISED BY: D.KREFSKI DATE:10/29/2019 DISSOLVED SOLIDS (TDS)
/ 1 - LOCATIONSNOTALONGTHECROSSSECTIONARE CHECKED BY: T.GRANT DATE:10/29/2019 ACTIVE ASH BASIN
\ / \ I / 1 \ \ I\ - \ / / soa = \ / / - / \ - 1 / - PROJECTED ONTO THE CROSS SECTION. APPROVED BY: S.SPINNER DATE:10/29/2019 CORRECTIVE ACTION PLAN UPDATE
PROJECT MANAGER:S`SPINNER CLIFFSIDE STEAM STATION
CROSS SECTION LOCATION camTp a �+ v. ^-

800
750
ai
aD
Q
Z
Z 700
O
a
W c
J AS
W s,
U (tot:
650
600
500
K--me-
(WEST)
GWA-57S
AS p
S 132
sCO?�._-
-----
........... .......
:—
1■■ m
1■■ nn
1■■ 11■■
11■�■ n■■i.
L 4S�n
I00 ' Ips3il�\
1— 1 llm
GWA-33S
AS 0.2
Sr 142
u (rarap 0.o0om
\\ / • ♦4♦ A6 I= u (total) aolI 4 � 131 �- \ O/ \ I / 1 u (tool) <o.aooq \ \ \ / \ I / 1 I \ \ / \ / ♦1
I / GWA-SBBRU ♦ 1 / _ i As o.ls TRANSITIN --
NA za / \ — \ — \ � / \ —ZONE
GWA-435
AS ABBBRUA
GWp / ,♦- e / \ / — �- \ / \ I/ — / I , — \ / \ 1/
s 157 A 13\ I — I— u Rotap o.aoss \ \ — \ — ♦ \
\ v o3 \ I \ — / � I v aaa, \ / — I/1 I \ / — Asa4BR \ / / I ♦ \ / — i \ / \ /
U ftotap - AS 0.14 GWA-2W AS G.G II / \ . / \ C \ / 1 �I
1 AB -OW — , I / \ / \_ u (total)
082
/ I \ — \ 1 / \ \ • \ I/ \ \ ,/ \III (e cap <o.apos \ \ / — \
ftotap <O.aoos k BEDROCK . \ \ / I _ \ / \ / I \ \ _ \ / BEDROCK
v 103 — �I u (total) 0.0pw
_ I .N� q / I / \ / , \ I I / \ BEDROCK\ / •
♦ / .' / , GWA-seaR / — / Sll \ \ f \ / — - / \ / ♦— \ \ /.\
GWA-57BR \ ♦ As <0.1 - .� \ I / T 1 \ / ♦ �. I �♦�. I ! \ / \ Y I
WA-336R \ \ U(total) /♦ / \, / / \ / \ /.\ \ / \ / \ / \ FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
AS <p.l � AS 0.1 \ / Sr 241 ;.�- \ .� / 1 , \ \ I` / \ \ I / \ \ . / 1 \ 1 / \
Sr 199 _ (total p.a0oa / _ i v o•aG h ,/ r i _ / I / _♦ i _ I� / _ i ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
204 ♦♦ I u(total) o.am9 { — \ - V < — \ \ / \ ♦�\ } _/\ — ,j — \ \ / ORIENTATIONSACOOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND
(total) - } / / I/ / / / / / / / \VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FARTOO NUMEROUSTO
AS
' / \_ i / / \ �% — / • / / — / sr _ \ / \ / — / I /.\ / — / ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
ARE CONCEPTUAL ONLY.
I LEGEND
♦♦ i / I \ — \ /I \ / ./� \ GWAf56RL / —� \ GWA 58S WELL IN SHALLOW LAYER ASH ASH PORE WATER ELEVATION
—♦ ��y I ♦\ / \ / L As 0.11 \ \I/ WELL IN DEEP LAYER
\ /♦♦,�I / 1 \ / '(/ \ ♦♦ � / � \ sr ass I � GWA-58D ASH PORE WATER
/ /� — — ,I\ �♦ u ftotap 0.0001 \ I \ / GWA 58BR WELL IN BEDROCK LAYER SHALLOW GROUNDWATER ELEVATION
-
KI
(EAST)
ACTIVE ASH BASIN _
a GROUNDWATER FLOW IS PERPENDICULAR T
CROSS SECTION IN THIS AREA 0
rn
r" NN
ry�MM
LL�
1�31r
�
I
m_ __ ______
___
m =__ - _ =_
_
ASH__==-__:
_- -==-__ASH_=-�=�__-
----------------------
--�---�---�---�-- =-- =_ -FILL-
---------------------
--
-=- ===- ===- ===- ===- ===- =_= a a a a a a
--------------------------
s
___ __
_�-----
-
%A"��*A15SAPROLIT
A"M _
--- As 3n ---_--__--____-�__-�==ASH
_ ___
ABS
PORE WATER=_-�__-�_ - _ ____-_�___-_�___GwA-z4D
AS 9z.6
A��-------------
As 65.1 ----- uRarap 0.00z7 - _
- - -
sms v
___ __ __ _-___-___-___-___-___- AS <0.1
____- ABBMAIS------------- -------_--_-_-_ sr zm7 =- - ------------------_ -- sr
---------------
___�__-� ASH PORE WATER uftotap
-- _
----- --_ -
u (total) a.072s - - ----
_------------_-------_-
Sr 1358 _-__-- V 41.8 _ _ __________
- - - nsoauss ----------------
AB-a3st --
v szs
- - - - - u (total) 0.0003 _
/
V
109 ne-oast =_- AS 180.-_---_--_-_---_= TRANSITION
�I ■1
:low V 75.8 SAPROLITE
SAPROLITE
...�■■_■■■■■■� 1
800
750
700 Z
650
600
\ /\ I— \ * / \/ / \I / I �� \/ v 0.3 \ / / ® FILL NOTES:
r I / \ l / / I\ / \ /\ \ / I — \ AB_8S WELL IN ASH PORE WATER SAPROLITE DEEP GROUNDWATER ELEVATION 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
0
CENTRAL TENDENCY OF DATAS ETUSIMG DATA RANGING FROM JAN UARV 2018
/ \ �•� \ / \ \ i / �..< A.� ' / \ i — —GENERALIZED WATER TABLE ® TRANSITION ZONE TO JUNE 2019.
BEDROCK GROUNDWATER ELEVATION 2. ARSENIC (As), STRONTIUM (Sr), TOTAL URANIUM (U), AND VANADIUM (V)
\ ♦ / — \ \ t / \ / \ — / _ _ GENERALIZED BEDROCK FRACTURE _-,; ; BEDROCK CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L).
��./ \ \ /\� / ��b / % / I ♦♦, / \ / I / \\ / ORIENTATION AB,[ABR MEAN ARSENIC (As) CONCENTRATION (pg/L) ' WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
450 \ / I / \ _y♦� / \ I \ / \ / ~ /I \ / \ / — \ �� GENERALIZED GROUNDWATER As '01 MEAN STRONTIUM (Sr) CONCENTRATION (pg/L) MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
\ / \ / 1 / \ / FLOW DIRECTION Sr 105 -NO DATA AVAILABLE
350
77
\ — \ / GWAiS
_ \ _ \ /I\\ / \I
300
Ix (total)
CROSS SECTION LOCATION
u,ota,) P. MEAN TOTAL URANIUM (U) CONCENTRATION (pg/L)
V <03 MEAN VANADIUM (V) CONCENTRATION (pg/L)
WELL SCREEN
COMPLIANCE BOUNDARY
BREAKLINE
NOT AVAILABLE OR NOT MEASURED
4' DUKE
ENERGY
CAROLINAS
10p
synTerm
0 60 120 240
HORIZONTAL SCALE: 1" = 240'
VERTICAL SCALE: 1" = 48'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 1i
REVISED BY: D. KREFSKI DATE: 1i
CHECKED BY: T. GRANT DATE: I
APPROVED BY: S. SPINNER DATE: 1i
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
ANALYTICAL PARAMETER
As
Sr
U
V
REPORTING UNITS
Hg/L
pg/L
pg/L
Pg/L
1SA NCAC 02L STANDARD
10
NE
0.03^
3-
13ACKGROUND THRESHOLD VALUES
(SHALLOW ROW ZONE)1
0
34
0.000S
1
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)i
2
69
0.000S
11
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)t
1
93
0.000S
1
^ -FEDERAL MAXIMUM CONTAMINANT LEVEL.
' - IMAC OF THE 1SA NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1-UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
FIGURE 6-10b
GENERAL CROSS SECTION K-K'
NON -CONSERVATIVE GROUP
MEAN OF ARSENIC, STRONTIUM, TOTAL URANIUM
AND VANADIUM
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
O
a
W
J
W

K - - KI
(WEST) ',
ACTIVE ASH BASIN _ (EAST)
a GROUNDWATER FLOW IS PERPENDICULAR T
CROSS SECTION IN THIS AREA 0 rn
800
Fe 246 -----------------
AB-031 �' ____ __ ______ ___ ___ ___ ____ FILL
Mn ]856 Cn 0.17 J N N N a a0 O� aQ Om,D ___ ____________ J Q Q
TI <al Fe 156 FILL------------- - _---__---_---_---_- O (A 00 fq JJ 7
GWA-57elAl Mn m m N Q Q Q 3U' Q a =---� --�--- -ASH ===_ ==r -_- ___ ==ASH ==_ ===- __-
m 13 a.36 c0 __ ______ ___ _FILL
______________________ ___________
Fe]33D 7 a _____________________ __________________ ____. __ _________________________ AB-a46 --�_--
Mn 7B6 Gt Ot o ?� ___- ___- _-____ __=_ As-oas - _ _________________ on _ _ co <°.1 _ - ____--------------= SAPROLITE
TI ax w m m m w m c/lcy V'---__--__- _ASH =_-=__-_=_ -- - _--_-__------- -------------�---�---�---�---�---�---�----- Fe sa -- - __--__--__--__--____-
1^1� Y~'x co N N ___________ ____ c____ ______________ 1.0 ____ ___ ____________ _- Mn <s - Fe <s° ________________________ P
m ' vT coy a =__ =__ =__ � '-'' ___ -_-=_- __- __- __- _- Fe az6a -- - - ------------------ASH PORE WATER=--=-- -_-- -_- - _ Mn s -
75Uto C m w O QQa aQ Q Q3 ___-_---��__------------------- A6086 ----- Mn ilas ---_---__--___=-__-_-__-__-�____________-=-=---_-T -
Wiz- -_______________________ _ - -- -- - --------------------- --------------------
M M M M M fA a O' FILL--------------------------- - co a.39 --- TI a6a Ae-0allnass ------------------------------ - /
M M M Y C7 C7C9o•T C�9U'---==---==---==---==---==---==---=_ _-- ----_--___-----__ -- -__-=----ASH PORE WATER
Q Q 4''j Q Q _____________________________ __ Mn 73.4 __ ___ - _____ Fe <6a ___ a.099 --_ _ __ Ae-04A75 ________________ / / \ �•
ASH PORE WATER -__- --_ n a.9s Aar _ - __-__ Mn s -- -_ ___-\TRANSITION
Z� Fe 97.1 - - - - - 5.4 _-_- \ GI C7 (' C7 C7 (' ___________________________ _ - _____ ____ 4106 ______________ Ca
SUCK AB-0Z5 ]IS _ _ _ _ _ _ TI <a.l Mn 9.1 _ _ Fe
00 CREEK _____ _ _ _ _ _ _ _ _ _______ _________ _ _ _ _ _ M _ ___ _____ _ _ ___ _ _ _ \ ZONE
� GWA-Za5 � 39.7 ___________________ _ Mn 323 TI <a.l - n 6B6 / Fe
i
GWa335 SAPROLITE T oz7 - - _ _ _ _ _ _ _ _ _____. � 1 � / _ _ Mn
Mn 17598 -- WFe
\TI
>Fe 96B _______________\Mn 6013 TI °sa A84761 SAPROLITE
Z .Z700\Co 11.8 TI <al \ TRANSITION ZONE 4Z
Q \ ♦� \ Mn las a Fe 4a.a
\ / j / \ ♦ ♦ \ / \ / i �A&QED26 TI °.aa7 Mn 1s90 -L TRANSITION
Q Gwa33° / \ _ \ �• \ 6wA-seams 17i - \ rl aa� / - - \ f / \ -ZONE-
�' ••I \ / . co u.7 NA / \ \ I \ \ / z As-aeenu \ \ \ I
LU Fe aW \ • GWA�L I Fe 31ao Mn / / \ l.a / / I /` / / /I
-I Mn 89 / Co P25 Mn 720 / i \ \ / \ /, �- \ \ Fe ]357 / \ / - _ A6in8RUA \ / \ / ��- _ si / \ / \ / \ / H- - \ / \ I/ /I 41
/ / TI 0.13 GWA-20D Mn 245 \ _ - \ \ I.IJ TI <al / - \ Mn CO 100 I -
Gwaau / <so \ ^ / \ / I \ \ � / \ ♦ e / \ I / \ \ / I, \ I ✓ \ \ / / \ I \ I / I \
\ Fe 1664 I / \ /I \ / \
W 13 • / _ / I / Mn _
Fe va / _ ':'\ / M" \ \ /� \\ / I \ \ j / \ \ T - \ \ \BEDROCK / \ / \ i
650 Mn 2i3 � ���% \ . / �'� \ ♦ BEDROCK - �I�\ \ \ - / Ae�R - I / �I ,
TI <al / \ I / / \ I \ / / / •III \
btiVA-1G9a /� / / I \ / I \ / I / \ / 13 / \� / I / \ / • \' I • / \ I \ BEDROCK\ ♦/ - TI <aa / - h /
♦ A-s7eR / ♦ Ca 0.28 / - \ / - \ \ \ / - - \ / Fe 2096 \ \ /t� \ / - _ \I / / -I \ \ / \ / - _ \ \ / / - .•� \ / \ \ / \ / - y� b� \ /
GWA-HBR 06 / \ Fe i I MI I I \ / /I \ I I \ f' I \ / / \ I \ / I \ / •y . I ■ \ / I \ / / �. I ,
Mn a� ���� - / \ / \ A ik / \ � \� I\ / )( / \ ♦ I / \ - \ /I FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
m 'al
0. 8.7 ♦ �' / - I/ t / - < I / / - / - / \ �/ / - / - \ / \ / / ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
Fe ]304 ♦ / Mn 966 Fe 12352 \ --I \ \ ,` \ \ I \ / \ \ J� / _ / \ \ / T \ / .
Mn gq ♦ TI <0.1 GWA-50R \ Ae-aamu / \ I / \ ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND
♦ \ / Mn use 'I / \ / l / • /O l / \ i/ I / I l \ / I / \ ♦ / / / • / /
Ca 0.31 �� TI �G,1 _ _ _ y \VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUSTO
Fe 1935a \ / _ / \ \ / \ r - _ \ / 1 / \ / Fe \ / \ / \ / \ j� \ / \ / ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
\ /\ - \ \ / Mn 1a3a \ \ / - I \ / I I \ / - I Mn - I \ / - I \ % I \ / \ / \ I ARE CONCEPTUAL
NCEPTU LONLY.TI
soo _I v LEGEND
GWA fifiBa WELL IN SHALLOW LAYER -I \
a� ; /I \ / � �� � \ /♦� ; \ � o.1e / I/ GWA-58S � ASH � ASH PORE WATER ELEVATION
% (/ \ I ♦ ♦ / / / Fe Joao \i / GWA 58D WELL IN DEEP LAYER ASH PORE WATER
500 \ / \ / / \ _ / \ - - �♦ Mn z99 -I \ SHALLOW GROUNDWATER ELEVATION
450
400
350
300
800
650
600
WELL IN BEDROCK LAYER ® FILL 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
/ \ _ / \ CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
��'� / �\ / \ / \ / - \ AB 8S WELL IN ASH PORE WATER DEEP GROUNDWATER ELEVATION TO JUNE 2019.
SAPROLITE _
2. COBALT (Co), IRON (Fe), MANGANESE (Mn), AND THALLIUM (TI)
\ / \ / \��•� \ / \ _ \; / �.< A.� - / _ / - - GENERALIZED WATER TABLE ® TRANSITION ZONE CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Ng/L)
BEDROCK GROUNDWATER ELEVATION
\ ♦ / - \ / \ t / \ / \ - / _ _ GENERALIZED BEDROCK FRACTURE _-,; ; BEDROCK
�� \ \ ♦� / �y / \ / I �♦♦ / / / \ / ORIENTATION *WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
/ \ / I / \ \ �, ♦♦ \ / \ / - �\♦ /\ I \ Ae.aex MEAN COBALT (Co) CONCENTRATION (pg/L) MOST RECENT- VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
41.
GENERALIZED GROUNDWATER Ca <0.1 MEAN IRON (Fe) CONCENTRATION (Ng/L)
FLOW DIRECTION Fe 118a7 MEAN MANGANESE M CONCENTRATION L NO DATA AVAILABLE
'i
Ott
CROSS SECTION LOCATION
4' DUKE
ENERGY
CAROLINAS
l0p
synTerm
( -) (pr )
ANALYTICAL PARAMETER Co Fe Mn
TI
MEAN THALLIUM (TI) CONCENTRATION (Ng/L)
REPORTING UNITS ug/L u9/L u9/L
u9/L
15A NCAC 02L STANDARD 1* 300 50
0.2*
WELL SCREEN
BACKGROUND THRESHOLD VALUES
21 1700 760
(SHALLOW FLOW ZONE)l
760
COMPLIANCE BOUNDARY
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)' S 1840 760
760
BREAKLINE
BACKGROUND THRESHOLD VALUES
2 7680 232
(BEDROCK FLOW ZONE)'
232
NOT AVAILABLE OR NOT MEASURED
* - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
0 60 120 240
HORIZONTAL SCALE: 1" = 240'
VERTICAL SCALE: 1" = 48'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 1i
REVISED BY: D. KREFSKI DATE: 1i
CHECKED BY: T. GRANT DATE: I
APPROVED BY: S. SPINNER DATE: 11
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-10c
GENERAL CROSS SECTION K-K'
VARIABLE GROUP
MEAN OF COBALT, IRON, MANGANESE
AND THALLIUM
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

G
00
0
Q
Z
Z
O
w
J
W
850 N --au 1111111- N F 850
800
750
700
650
600
mo
ACTIVE ASH BASIN
CN c�
as mono
N N N
C7 :�
POSSIBLE RADIAL GROUNDWATER FLOW
IN THIS AREA 0 0 (D 800
LP OLITE
(� N N GWA-24S
SAPROLITE B <so
Fk-i�
ASH a a a SLoa z°
Y / \ TRANSITION ZONE cce-iso--------_—_ - ---------------------- -_-�-�-�-�_ - \
w----'�-T----------------------
- - --_-_-_-_-_-_-_-_ --- --- --- --- --- --- --- - - - - -
_ B 117 _ _ __ _ _ _ _ _ _ _ AB 066 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - AB_05S - - - - _ _ _ _ \ \
00
U B 9HU / \ I / 1 \ \ \ / \ SL(M D.i ______ Li 00_________ _________________-__-__-__-_ B 5242-______ \ \ / \ I GWA-24D° 750
504 65 / / / TDS 39 \ 504 111 _ __ __ __ ____________________________ __ _ SL04 988 __ __ __ __- / - \ Li 1.7 Q
j / ros z61 _ \ / \ \ \ _ \ \ 377 -- - -- -- -- --- --- - - - - ---- ASH PORE -- ----- - - -T� - - 4 - --- - \ / \ _ / r°s 4s /
-- WATER _________ / Q
�_7_7—____ ___ ___ ___ ___ _ _ _ __ _ _ — TRANSITION
/ I \ \ \ / BwA 2468° Z
1 ZONE �1\/\ s04 7 H
n
/�\i �\/wB 258 \ / \ / - /-Li 1 .0 ` / \ - Li 1.6/ /\t;?
2.53- \ \ 700 LLIRI I / \ I /
BEDROCK'
aB--BSD \/ a e-858R °
L0
SL04 951 - S4 1.66
TDS 89 1 \
BEDROCK
650
-
I BEDROCK
NOTES:'
CROSS ,
CROSS SECTION DOES NOT INCLUDE A BEDROCK / \ / / \ / / \ 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA I — \ / / / \ I — \ / / / \ I — \ / / / \
\ I \ \ I \ \ I \ CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
CAN BE USED TO DETERMINE GENERALIZED FRACTURE ` \ / \ / — — ` / ` / \ \ / \ / — — ` / ` / ` \ / \ / — — \ / PTO JUNE 2019.
ORIENTATION.
ILI
gROAp
_
RIFFR
a
..
FORMERUNI—
TBASIN
ASH ,� I
ASH
CSTEAM LIFFSIDE` W �S�1fRER'�•
STATION \ U -
-=Q
UNIT 5
INACTIVE
ASH BASIN`,
f
1 ACTIVE ,
,.
N ASH BASIN
`
1..r
Ape �
i
..
..
V1
CCP
LANDFILL
Mp R ,
C-��'
NOTE:
_
CROSS SECTION NW IS LINEAR IN NATURE AND ALL
.
LOCATIONS NOT ALONG THE CROSS SECTION ARE
-
-... PROJECTED ONTO THE CROSS SECTION.
LEGEND
GWA 25S WELL IN SHALLOW LAYER
GWA 25D WELL IN DEEP LAYER
GWA 21BR WELL IN BEDROCK LAYER
AB 6S WELL IN ASH PORE WATER
—GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
ASH
ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
ALLUVIUM
ASH PORE WATER ELEVATION
V SHALLOW GROUNDWATER ELEVATION
V DEEP GROUNDWATER ELEVATION
BEDROCK GROUNDWATER ELEVATION
AB -am MEAN BORON (B) CONCENTRATION (Ng/L)
B <so MEAN LITHIUM (Li) CONCENTRATION (ug/L)
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
alad
MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
WELL SCREEN
COMPLIANCE BOUNDARY F
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (P9/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS
ARE IN MILLIGRAMS PER LITER (mg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
REPORTING UNITS Pg/L Ng/L
mg/L
mg/L
15A NCAC 02L STANDARD 700 NE
250
500
BACKGROUND THRESHOLD VALUES
50 3
(SHALLOW FLOW ZONE)'
4
57
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)' 50 12
15
107
BACKGROUND THRESHOLD VALUES
50 11
(BEDROCK FLOW ZONE)'
17
120
' - UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED
FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
NE - NOT ESTABLISHED
CROSS SECTION LOCATION

850 N — N' 850
mo
N N ACTIVE ASH BASIN
as mmo
N N N
� L)
POSSIBLE RADIAL GROUNDWATER FLOW
800 IN THIS AREA (D 800
SAP OLITE
LO In N N
m I SAPROLITE
a a a ASH a GM-24S
As 0.1
/ \ 10
TRANSITION ZONE -------- --- --- ----- _ _ _ _ -__ ___ ___ ___-_- \ u (total) -
---------------
Lw GWA-27DA 1---��-T \ / — AC[R-16D0.1 - _ _ _ _ _ _ _ _ AB-065 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ \ V O.s
A. I
co Sr a07 / \ I / 1 \ / \ Sr 10 _ _ _ �
750 D(totao <°.°°°s / \ 0a°tao Sr 2s10_______________________________________= Sr 354° __—_-= 750 r
> U / .' v <0.3 \ / 1 / v <6.3 ` (Vap a&90------------------_------ ASH PORE - --__- uctVaO o.1667 --___- Sr <240.1 /
WATER__---_-_-_-_==__ - - - - _ - _ - _- ------ nVaao .3 / \A -24RR
____________________________ Q
Z
\ — I \ / — I \ / — I _ _ \ TRANSITION \ / — \ sr zs Z
ZONE i
J / I / /i \ / I / \/i \ As o / \ \/i S 39 \/i \ / w
w 700 / \ / \ AcwA-278R \ / \ / — \ / \ / — — \ / Sr 2
9 / \ / — \ / u (totap A'— — \ / \ / \ / \ 700 Lu
U (total) <0.0oos I \ / I \ / —
V < 0.3
BEDROCK'
FSr
0.1
�r123Sr 101 \— 0.3U ft0tap <0.000
BEDROCK v <0.3 _ / /
650 l /\/ i l l/\ \ i l /\/ i l l / /�/ — / l / /�/ — / l / /�/ 650
BEDROCK _ \
CROSS SECTION DOES NOT INCLUDE A BEDROCK I \ / \ / I / \ / \ I \ / \ / I / \ / \ I \ / \ / I / \ / \ 'I. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA — \ / \ / — \ / \ / — \ / \ / — \ / \ / — \ / \ / — \ / \ CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
CAN BE USED TO DETERMINE GENERALIZED FRACTURE TO JUNE 2019.
600 ORIENTATION. \ \ / \ I \ / \ / \ I / 1 \ \ / \ I \ / \ / \ I / 1 \ \ / \ / 2. ARSENIC (AS), STRONTIUM (Sr), TOTAL URANIUM (U), AND VANADIUM (V)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L).
.. •--• �_ -\...:
_ FORMERUNI—
TBAS
ASH N ,� I
,. \ .. ;Of ASH
�/
1v C IFFSI E\ w ,%T R AGEk
STATION Y
-=Q
UNIT
INACTIVE `-,
ASH BASIN ",
_.
1 U
C _ h� J
1 ACTIVE f ,
N ASH BASIN r
..
CCP
LANDFILL
_MCCAR
t,ROAO
NOTE:
_
CROSS SECTION NW IS LINEAR IN NATURE AND ALL
.
LOCATIONS NOT ALONG THE CROSS SECTION ARE
-
-... PROJECTED ONTO THE CROSS SECTION.
LEGEND * WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
GWA 25S WELL IN SHALLOW LAYER V ASH PORE WATER ELEVATION - NO DATA AVAILABLE
GWA 25D WELL IN DEEP I AVER ANALYTICAL PARAMETER As Sr U V
GWA 21BR WELL IN BEDROCK LAYER V SHALLOW GROUNDWATER ELEVATION
AB 6S WELL IN ASH PORE WATER V DEEP GROUNDWATER ELEVATION
GENERALIZED WATER TABLE BEDROCK GROUNDWATER ELEVATION
GENERALIZED GROUNDWATER
FLOW DIRECTION MEAN ARSENIC (As) CONCENTRATION (pVL)
ASH s A�w� MEAN STRONTIUM (Sr) CONCENTRATION (ug/L)
�ctoao <°.600s MEAN TOTAL URANIUM (U) CONCENTRATION (ug/L)
0 ASH PORE WATER °° MEAN VANADIUM (V) CONCENTRATION (IIg/L)
® FILL
SAPROLITE WELL SCREEN
® TRANSITION ZONE C
COMPLIANCE BOUNDARY E
BEDROCK
C,
ALLUVIUM
REPORTING UNITS
pg/L
pg/L
pg/L
pg/L
15A NCAC 02L STANDARD
10
NE
NE
3*
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)1
0.2
34
0.0005
1
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)'
2
69
0.0005
11
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)t
1
93
0.0005
1
* - IMAC OFTHE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1-UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
CROSS SECTION LOCATION

850 N — N' 850
mo
N N ACTIVE ASH BASIN
as mono
C9 C7 N N N
POSSIBLE RADIAL GROUNDWATER FLOW
800 IN THIS AREA 800
SAP MITE
Lo m
T SAPROLITE
Q a a a ASH a '
GWA-27DA / TRANSITION ZONE ---------------- ----------------
Co 0.8 \
W Fe 97 - T — CCR-15D _ _ _-_ _-_ __ _ _ _ AB _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Co 0.1 _ _ _ _ _ _ _ _ _ _ _ _ _ GWA-245 \�50
LLJ
Fe
Co 5.2
3.
(Y Mn 1296 \I\\ Fe < 0 \ _ _ e 161 _ _ ______________________Mn 2 1$ Fe 1 3 \ 750 00
Q 750 U TI 0.2 / / Mn 112 _ Mn 46 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __-_ _ _ _ _ - TI <0.1 _ _ _ _ _ _ _ _ _ _ _ _ __ T1 52 Mn 5 0
\ / \ TI <0.1 ____________________--_____ _____________ TI <0.1 /
i U / ` rl <0.-------------------- ASH PORE ------------------- n
<0.1 i
--_-_ WATER_Z Z
----------------------------
---------------------
O \ — I \ / / \ I \ / — I \ / / \ I \ / — I \ / / \ I - - -- _ _-_ _ - _- __-- \ / ZONESITION / 1 \ A 248R \ I / O
/ i _ / / _ i / / _ i _ / / / _ i _ Co 0.1
— \ \ \ / / \ — \ \ \ AB-OSBRD \ \ / / Fe 54 ;
J I / \ / \ / I / \ / I / \ / \ / I / \ / / \ / / / / \ / I / \ Fe 104 / Mn 0. / Lu
J
/ GWA-27BR / Co 0.6 \ I \ / / \ / \ TI <0.1 \
W 700 / \ / \ / — Co 0.1 / \ / \ / — \ / Fe <50 \ / / — \ / \ / \ / Mn 171 — \ / / \ / \ 700Fe W
Mn 29
ir
97 1 \ I I / 1 \ I / 1 \ BEDROCK'/
I \ / / \ \/ I / \ \ / / \ / ► \ / / \ \/ I / / / \ / AB-68Ro. / / \ \ / / \ / I Fe 1.7
49 \ \/ I
/ / Mn 109
TI <0.1
TI <0.1
650 — i/\— /\ — \ /\BEDROCK 1 i/\— /\ — / /\ \ 1 � /� \ / /\ /\ `� /� \ //\ /\ 1 � 650
BEDROCK
CROSS SECTION DOES NOT INCLUDE A BEDROCK I / \/ / \ / / \/ / \ / / \/ / \ / / NOTES:
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUAATED BASED ON
CAN BE USED TO DETERMINE GENERALIZED FRACTURE — \ \ / / — — \ / \ / — \ \ / / — — \ / \ / — \ \ / / — — \ /CENTRALTENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
ORIENTATION. \ / — I \ / \ / — I \ / \ / — I \ / TO JUNE 2019.
600— 2. COBALT (Co), IRON (Fe), MANGANESE (Mn), AND THALLIUM (TI)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER (ua/L)
eROgO R --
fq
FORMER
UNITS 1-4
- ASH BASIN
ASH
CLIFFSIDE $- STORAGE
STEAM 'REH
STATION v
>� UNIT csi
is INACTIVE ACTIVE
ASH BASIN
c�N N ASH BASIN
N.
��{CCP T MOORqN,
�LANDFILL �,
�. v ..
NOTE:
CROSSSECTION NW IS LINEAR IN NATUREANDALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
LEGEND
GWA 25S WELL IN SHALLOW LAYER
GWA 25D WELL IN DEEP LAYER
GWA 21BR WELL IN BEDROCK LAYER
AB 6S WELL IN ASH PORE WATER
GENERALIZED WATER TABLE
_� GENERALIZED GROUNDWATER
FLOW DIRECTION
0 ASH
ASH PORE WATER
0
FILL
SAPROLITE
TRANSITION ZONE
BEDROCK
ALLUVIUM
ASH PORE WATER ELEVATION
SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
BEDROCK GROUNDWATER ELEVATION
,� assR MEAN COBALT (Co) CONCENTRATION (ug/L)
MEAN IRON (Fe) CONCENTRATION (Ng/L)
MEAN MANGANEEMEANTHALLIUM STI)(CONCENTRATIONT(Og/L)g/L)
WELL SCREEN
COMPLIANCE BOUNDARY F
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Co Fe Mn TI
REPORTING UNITS ug/L U9/L u9/L
u9/L
15A NCAC 02L STANDARD 1* 300 50
0.2*
BACKGROUND THRESHOLD VALUES
21 1700 760
(SHALLOW FLOW ZONE)1
760
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)` 5 1840 760
760
BACKGROUND THRESHOLD VALUES
2 7680 232
(BEDROCK FLOW ZONE)i
232
* - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
CROSS SECTION LOCATION

MW-10S
MW-11S
GWA-21S
1 /1 /2019 3/1 /2019 5/1 /2019 7/1 /2019 9/1 /2019
1 /1 /2019 3/1 /2019
5/1 /2019 7/1 /2019 9/1 /2019
1 /1 /2019 3/1 /2019 5/1 /2019 7/1 /2019 9/1 /2019
6.0
12
6.0
5.8
5.8
kA
11
1
1-05.6
V
5.6
V
x
x
x
10
N
a
5.4
a
5.4
a
9
5.2
5.2
5.0
5.0
8
700
150
360
600
100
320
;
500
>
50
E
E
E
280
W
400
1%
0
W
O
O
-50
O
240
300
-100
Monitoring well
200
Monitoring well 200
-150
dry as result of
Monitoring well
decanting.
dry as result of
dry as result of
765
5
741
decanting.
5
decanting.
5
c
c
c
670
M
760
4
Z
738
+�
_
Iu CO
755
3Go
..
w
v
735
3
"
�a
w co
a�
660
3
Wa
=
0)
c
a4ia
,�
c
Z
750
2
'o
a
J
732
2
z
655
2
o�C
4-1
745
1
3
729 I
1
3
650
1
740
0
726 IIII I, Jai 1
l � � � l
645
�� �J� , I��l
0
0
01/01/19 03/01/19 05/01/19 07/01/19 09/01/19
01/01/19 03/01/19
05/01/19 07/01/19 09/01/19
1/1/2019 3/1/2019 5/1/2019 7/1/2019 9/1/2019
Date
Date
Date
MW-10S: Shallow flow zone monitoring well located west of
MW-11S: Shallow flow zone
monitoring well located east of the
GWA-21S: Shallow flow zone monitoring well located near the
the active ash basin downstream dam.
active ash basin downstream dam.
toe of the active ash basin downstream dam.
LEGEND
NOTES:
V' DUKE
DRAWN BY: D.AVARD
DATE:10/31/2019
—
pH (SU) Decanting Start (03/31/2019)
NAVD 88 - North American Vertical
�y
� ENERGY
REVISED
BY:
FIGURE 6-12
—
Oxidation Reduction Potential (ORP) (mV) Decanting Suspended (07/02/2019)
Datum
CAROLINAS
GEOCHEMICAL WATER QUALITY PLOTS
Daily Total Rainfall (inches) Decanting Resumed (08/06/2019)
in - inches
CHECKED
BY: T. GRANT
ACTIVE ASH BASIN
my - millivolts
1410
APPROVED BY: T.
GRANT
CORRECTIVE ACTION PLAN UPDATE
SU - standard unit
�nT21'rd
FCT
MANAGER-
S, SPINNER
CLIFFSIDE STEAM STATION
www.synterracorp.com
MOORESBORO, NORTH CAROLINA

Note:
*sampling events prior
to 1/1/2018
Affected I
Potential
Mixing
Generally
Unaffected
N,
OO
*--- Ca AAB North
�O
�O
CI
1
AS-2S
■
AB-7BR
X
AS-71BRB
•
AS-1SB
CCR-7D
A
AS-213R
C
CCR-7S
AS-2D
0
CLMW-3D
Ash Pore Water
Wells
AB-03MA15
AB-05S
AB-03S
AB-06S
AB-03SL
AB-07S
AB-04LA15
AB-08S
AB-04S
AB-09S
AB-04SL
AS-07S
AB-04UA15
AS-08S
Background Wells
♦
GWA-24S
■
BG-01D
Z
GWA-25S
•
BG-01S
*
MW-22BR
A
GWA-24BR
❑
MW-22DR
V
GWA-24D
O
MW-24DR
IN
20%
80%
/40%/
20%
,r 7O
•
AV
00O 000 14
0 0 0
Ca
0
AB-6BR
AB-6D
CCR-16D
CCR-16S*
GWA-47D
C Affected
x
OO Ca
b�
\ Potential
o\o
� Mixing
Generally
Unaffected
/�07
80%x
60% NO
0* 40%
♦ 0\° CPO, Oo V
11�300 ry\o 0\0 OO �\o
0
AAB South CI ---w
20%

Note:
*sampling events prior
to 1/1/2018
Ash Pore Water Wells
AB-03MA15 AB-05S
AB-03S AB-06S
AB-03SL AB-07S
AB-04LA15 AB-08S
Affected o cb
AB-045 AB-095
AB-04SL AS-07S
0° AB-04UA15 AS-08S
Potential co 3 °\o
Mixing oo �O \
Background Wells
0° `�� ♦ GWA-24S
0
Generally * F ■ BG-01D Z GWA-25S
Unaffected • BG-015
* MW-22BR
J ■
A GWA-24BR 0 MW-22DR
V GWA-24D O MW-24DR
°\o \O
80% �' 2
�.� 60% b`
• o0
/40%
20% * ■
CP
00° 00°
0 0 0 0
�— Ca
AAB East
■
AB-1BROR
•
AB-1D
A
GWA-22S
MW-11S
♦
MW-20D
Z
MW-20DR
•
CI
14
80%
�.� 60%
AB-2131RO
GWA-20BR
AB-21D
GWA-20D
AB-2S
GWA-20S
V AB-3BRUA
GWA-58BR
♦ AB-3I
GWA-58BRU
Z CCR-8BR
GWA-58S
IO°
* CCR-8D
GWA-62BRU
1
G O
Op CO,
Affected
x
COO
Potential
°
ry\
Mixing
_Z
* F
A
Generally
Unaffected
-,
■
40% ET •
AV
20% ■
4K i O •
,Vol e)o
0 0
s— Ca
°\°
oo0 o
�l�80
N\AA
lif
yOo°
\° V�0%r■ CP
-10
O �V
AAB West CI

k
�% �'u.
9
e
Ali'
lil"Ail"Is
Aga
■ (.WA-91RG
- P
MW-11 BRO
AB-1 S
AB-1 D
AB-1 BROR
MW-21BR
CCR-4D
N
•
AB-5S
AB-6S
SE FINGER
SW FINGER
/' DUKE 250 ORAPHIC SCALE
250 500
4 ENERGY
CAROLINA'- (IN FEET)
DRAWN BY: C. DAVIS DATE: 05/03/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
synTerra PROJECT MANAGER: S. SPINNER
www.synterracorp.com
LEGEND
GEOCHEMICAL SONDE LOCATION
TRANSDUCER LOCATION
ASH BASIN WASTE BOUNDARY
- ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA
DUKE ENERGY CAROLINAS PROPERTY
STREAM (AMEC NRTR)
NOTES:
1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR - NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM RIPS 3200 (NAD83).
FIGURE 6-14
SITE LAYOUT - DECANTING
MONITORING NETWORK
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

A13-1 Cluster
A13-3 Cluster
A13-4 Cluster
750
�
744
Go
> 738
Q
Z
c 732
0
i+
�a
d
u+ 714
d
J 708
d
R
?� 702
696
r. r
00
00764
G
Q
Z
"763
c
m
762
W
d
761
L-
ai
M
3 760
759
/2019 3/1/2019
764
00
4 00
> 762
Q
Z
3 •. C 760
w >
c �
2 W 758
w
07
J
y 756
1 �
3
754
0
5/1/2019 7/1/2019 9/1/2019 1/1/2019 3/1/2019 5/1/2019 7/1/2019
Date
AB-1 S Water Elevation (NAVD 88)
AB-1 D Water Elevation (NAVD 88)
AB-1 BROR Water Elevation (NAVD 88)
AB -SS
1/1/2019 3/1/2019
5/1/2019 7/1/2019
Date
AB-5S Water Elevation (NAVD 88)
Date
AB-3S Water Elevation (NAVD 88)
AB-3SL Water Elevation (NAVD 88)
AB-6S
5
762
00
4 00
p
Q 759
Z
3 c .2756
M
M >
c °1
2 Q W 753
a�
j
750
1 M
3
747
0
9/1/2019
1/1/2019 3/1/2019 5/1/2019 7/1/2019
Date
AB-4S Water Elevation (NAVD 88)
AB-4SL Water Elevation (NAVD 88)
AB-4D Water Elevation (NAVD 88)
AB-413R Water Elevation (NAVD 88)
CCR-3BR
5
4
3 E
w
c
2
1
0
9/1/2019
5
4
3 'E
4-
2
1
0
9/1/2019 1/1/2019 3/1/2019 5/1/2019 7/1/2019 9/1/2019 1/1/2019 3/1/2019 5/1/2019 7/1/2019 9/1/2019
Date Date
AB-6S Water Elevation (NAVD 88) CCR-3BR Water Elevation (NAVD 88)
J /VV
00
00 765
4 p
Q
Z
764
3 Z,
M
- 2 763
W
2 w
762
L
Y
1 f6
>+ 761
0 760
LEGEND
Notes:
Decanting Start (03/31/2019) Water level elevations are measured in feet
Decanting Suspended (06/02/2019) NAVD 88 - North American Vertical Datum 1988
Decanting Resumed (08/06/2019) in - inches
Daily Total Rainfall (inches)
5 730
/1
Go
00
4 p 725
Q
Z
c c
3 Z, 2 720
w >
c �
M W
2 715
d
J
L
Y
1 3 710
0 705
DUKE
DRAWN BY: D. AVARD DATE: 10/31/2019
ENERGY
REVISED BY: M. ROZIER
R
CHECKED BY: T. GRANT
CAROLINA$
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
synTena
www.synterracorp.com
FIGURE 6-15a
HYDROGRAPHS - GROUNDWATER
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NC

CCR-4D
GWA-21 Cluster
GWA-24S
762
00 760
C
Q
Z 758
c
756
d
W
754
d
J
L
752
7r,n
5
672
oo 668
4 p
Z 664
c o
3
`, 660
�a to R
w >
c �
2 W 656
W
N
i 652
1 �
3 648
I
644
I I I 1 .1 .....I I , III I .III
n
1/1/2019 3/1/2019 5/1/2019 7/1/2019 9/1/2019 1/1/2019 3/1/2019 5/1/2019 7/1/2019 9/1/2019 01/01/19 03/01/19 05/01/19 07/01/19
Date Date Date
CCR-4D Water Elevation (NAVD 88) GWA-21 S Water Elevation (NAVD 88) — GWA-24S Water Elevation (NAVD 88)
GWA-21 BRU Water Elevation (NAVD 88)
MW-10S MW-11 Cluster
� 765
00
0 760
Q
Z
0 755
i7
m
d
W
y 750
d
J
L
a�
3 745
740
J
780
00
00
4 p
Q 777
Z
3'`c 0 774
41
M
M >
c °1
W 771
2� N
d
L 768
a�
1 f6
3 765
n 7G7
MW-21D
5
4
3'`c—,
w
c
2W
1
0
09/01/19
F I 7Gn _ rJ
01/01/19 03/01/19 05/01/19 07/01/19
Date
MW-10S Water Elevation (NAVD 88)
780
00
00
4 p
Q 775
Z
3v o
y 770
'� W
2 1% a�
d
J
L
765
1 M
3
0 760
09/01/19 01/01/19 03/01/19 05/01/19 07/01/19 09/01/19 1/1/2019 3/1/2019 5/1/2019 7/1/2019
Date Date
MW-11 S Water Elevation (NAVD 88) MW-21 D Water Elevation (NAVD 88)
ao
4 ao 750
G
Q
Z
740
3 •E o
a>i 730
W
2
J 720
L
a�
Y
1 �
3 710
0 700
I.I.
MW-11 BRO Water Elevation (NAVD 88)
5
4
3 V
c
2 �
1
0
9/1/2019
LEGEND
MW-11 BRO Water Elevation (NAVD 88)
5
4
3 V
c
2 �
1
0
9/1/2019
LEGEND
DUKE
�
DRAWN BY: D. AVARD DATE: 10/31/2019
REVISED BY: M. ROZIER
FIGURE 6-15b
ENERGY
Notes:
CHECKED BY: T.GRANT
HYDROGRAPHS —GROUNDWATER
Decanting Start (03/31 /2019) Water level elevations are measured in feet
CAROLIhEAS
APPROVED BY: T. GRANT
ACTIVE ASH BASIN
Decanting Suspended (06/02/2019) NAVD 88 - North American Vertical Datum 1988
PROJECT MANAGER: S. SPINNER
CORRECTIVE ACTION PLAN UPDATE
Decanting Resumed (08/06/2019) in -inches
Daily Total Rainfall (inches)
CLIFFSIDE STEAM STATION
5ynTena
MOORESBORO, NC
www.synterracorp.com

760 -
..
00
00
a755
z
0
a
_> 750
W
a�
J
L
745 -
M
1/1/2019
Ash Basin Pond
3/1 /2019 5/1 /2019 7/1 /2019
Date
Ash Basin Pond Level Elevation (NAVD 88)
- 5 1 770 -
4
765 -
.,
00
00
a
760 -
3_
z
c
o
Z
755 -
2
a�
W
z
750 -
L
-1
a
3
0
9/1 /2019
745 -
Ash Basin Fingers Monitoring
-5
Eli
i
9/1/2019
1 /1 /2019 3/1 /2019
5/1 /2019 7/1 /2019
Date
South Finger Water Elevation (NAVD 88)
SE Finger Water Elevation (NAVD 88)
SW Finger Water Elevation (NAVD 88)
Active South Water Elevation (NAVD 88)
-3
w
EVA
LEGEND
Notes:
Water level elevations are measured in feet
NAVD 88 - North American Vertical Datum 1988
in - inches
DUKE
R- ENERGY
C:AROLINM
DRAWN BY: D.AVARD DATE:10/31/2019
REVISED BY: M.ROZIER
CHECKED BY: T.GRANT
APPROVED BY: T.GRANT
PROJECT MANAGER:S.SPINNER
FIGURE 6-16
HYDROGRAPHS — WATER IN BASIN
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
Decanting Start (03/31/2019)
Decanting Suspended (06/02/2019)
Decanting Resumed (08/06/2019)
Daily Total Rainfall (inches)
WnTena
CLIFFSIDE STEAM STATION
MOORESBORO, NC
WWW.synterracorp.com

A
I
A
f �
•
dam' I❑❑❑ I 0 ❑ /
100,
1000
❑ ❑ �
/ .�
low-
/�•.0
♦ e�
VVV
■
�♦
'
> DUKE
�;
ENERGY
�.
(IN FEET)
♦
f ♦
�• �,
/
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
f ��
- — . _ • ♦
��
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
-
- 1001,
PROJECT MANAGER: S. SPINNER
s(�/�'�
' e�
www.synterracorp.com
i�
LEGEND
0
FIGURE 6-17
ISOCONCENTRATION MAP
ARSENIC IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

V40•�•�A
8
76B
784
>92
4
808 8
�j
s
so
8 s
's
82 �
F
792
792
1
■
816 �
824
s B76
N
808 W c9 c J
N a v
o
6
vl-6AAA "
♦ ♦ 712 >Oq 696 664
688
672
N+
GWA-22S
...\ ♦� 664 �' - • • - CLP-2 . ■ . ■ ♦ 264
'+ GWA-21S 1
AS-2S 6S6 ♦ 158
p 1003
A� A � MW-11 S
♦ � , GWA-28S 766 1
CLMW-2 696 CLP-1 AS-5S <50
i
j 126 538 204 <50 1
AB-1 S
♦ AS-71 ■1150
+, 728 645 1 CLMW-SS `
AS-6S <50 `
712 ~ GWA-54S 11
75 <50
♦ > ' 768 ^ �
♦ �� CLMW-3S
911 ,♦1 ♦ 0 ■ AS-1S6 <50 Q MW-10S 1
♦ Q >36 e 1516 216
•, n'i GWA-57S 808
<50 4� 1
ln��ej<50
CCR-7S CCR-6S GWA-58S CLMW-12714 \
♦c. 1420 lie 7g4 �, 1
rn
GWA-43S , GWA-20S `
MW-23S 7g 283
<50 (le Q� AB-2S 6
I?",MW-8S 330 8�
GWA-42S 206
■ 29
1 CCR-11 S CCF
♦ 1207 114,
1
r
AB-81
J AB-31 ♦
50
� � 1
Cr7 11 ■��
i
1
GWA-24S
<50 co
co co
764
J j
GWA-63S
�g6 4F <50
�N
CCR-16S '— p
2580
r
♦ GWA-26S ♦'�'
• <50
808 G ,�
CLMW-6 M
816 °, <50 » ♦�
824 ♦ I
832 ■
I �
•
� GWA-25S
♦ <50
♦ ♦ � DUKE 250 125
�♦ .�♦ ENERGY
CAROLINAS
w
rn
(O
v
ai
GRAPHIC SCALE
0 250 500
(IN FEET)
♦ ♦ ♦ /
BG-1S ♦ ♦ _ ■ - 7i♦ ♦♦
- -
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/17/2019
CHECKED BY: T. GRANT DATE: 12/17/2019
APPROVED BY: T. GRANT DATE: 12/17/2019
PROJECT MANAGER: S. SPINNER
"i'Tena
www.synterracorp.com
664
LEGEND
ASSESSMENT MONITORING WELL - GREATER THAN 02L
STANDARD (700 Ng/L)
ASSESSMENT MONITORING WELL - GREATER THAN
CONSTITUENT BACKGROUND VALUE (50 Ng/L)
ASSESSMENT MONITORING WELL - LESS THAN BACKGROUND
VALUE
BACKGROUND MONITORING WELL
BORON PLUME GREATER THAN 02L STANDARD (700 Ng/L) FROM
MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED
PLUME IS USED TO REFINE DEPICTED BORON EXTENT
BORON PLUME GREATER THAN BACKGROUND VALUE (50 Ng/L)
FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL
PREDICTED PLUME IS USED TO REFINE DEPICTED BORON
EXTENT
ASH BASIN WASTE BOUNDARY
■ ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA BOUNDARY
■ DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (8- INTERVAL)
GENERALIZED GROUNDWATER FLOW DIRECTION
STREAM (AMEC NRTR)
j WETLANDS (AMEC NRTR)
APPROXIMATE HYDROLOGIC DIVIDE
® AREA UNDER FURTHER INVESTIGATION
NOTES:
1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS
BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN
JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATA SETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L STANDARD FOR BORON IS 700 pg/L.
3. THE BACKGROUND VALUE FOR BORON IN THE SHALLOW FLOW ZONE IS 50 pg/L (AS
SUBMITTED JUNE 2019).
4. THE 02L STANDARD OF 700 pg/L IS USED AS COMPARISON CRITERIA FOR BORON IN
THE SHALLOW FLOW ZONE.
5. --VALUE NOT AVAILABLE
6. GROUNDWATER FLOW AND TRANSPORT BORON PLUME SIMULATION IS FROM MODEL
LAYER 13 (FALTAAND OTHERS, 2019; MODEL OUTPUT PRODUCED OCTOBER 2019).
7. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018)AND FLOW AND
TRANSPORT MODELING REPORT (FALTAAND OTHERS, 2019).
8. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
9. NRTR - NATURAL RESOURCES TECHNICAL REPORT
10. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT
BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR
BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATA SITE AT
hftps://sdd.nc.gov/sdd/DataDownload.aspx.
11. ALL BOUNDARIES ARE APPROXIMATE.
12. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
13. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON DECEMBER
17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
14. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
RIPS 3200 (NAD83).
FIGURE 6-18a
ISOCONCENTRATION MAP
BORON IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

'aa I '� vl-6
♦ ♦, sus
792
792
1
616 �
824 •
� r �
s B76
N
808 W � 1�9 —� J
�♦ GWA-62BRU
72
GWA-33D �*
<50
I<50
♦+ 712 >04 696 664
�+ 688 -
+♦ 672
+ MW-20D
664° - • ■ _ _ r 442
GWA-21BRU '
1156
+ ; 656 R 1
A GWA-28BRU MW-11DA `
AS-9D AS-5BRU ♦ <50 79 1
; 138 <50 ■ AB-1 D
80
♦ AS-8D � � � ■ �❑
1 798 728 1
n<50
1
GWA-54D
74 Q 752 Q� ,
�4 ♦ �9
728 ♦+ CLM�W23D r'■ 8 67D ■ . ■ . mom ` 56 R 4D MW-21 D
GWA-59D
> 597 w CCR-SD Q \\ 80 co
<50
3g � � � . • `� 55
N GWA-57BRU MW-10D
AS-1 D 808
GWA-51 D 672 1
78 CCR-9D CCR-7D CCR-6D 153
�RQ 838 796 616 824 1464 GWA-23D
C <50
�IQG1 87s CCR-8D AB -7BRU
AB-2D s88 1991 94
29
MW-8D B-9D
130 AB-8BRU AB-3BRUA
��� ■ rJ 'l`
CCR-11D 438 6077
1210
CCR
♦ CUR-12D
� 373 54 AB-6D Isa+f
+� Lou= <50 i
♦ CCR- 44D
1
♦ 1095 /
,♦ r GWA-27DA GW0
A-24D
40
♦ 1
♦ CCR-15D AB-5BRU
w - 7771\ rn GWA-63BRU 117 <50
0 1
-� Jw � ��cp 816 �� . • o � �
W ? N 7 f AB-6D 1
GWA-47D CCR-16D 784
333 30 /0.00
LEGEND
ASSESSMENT MONITORING WELL - GREATER THAN 02L
STANDARD (700 Ng/L)
ASSESSMENT MONITORING WELL - GREATER THAN
CONSTITUENT BACKGROUND VALUE (50 Ng/L)
ASSESSMENT MONITORING WELL - LESS THAN BACKGROUND
VALUE
BACKGROUND MONITORING WELL
BORON PLUME GREATER THAN 02L STANDARD (700 Ng/L) FROM
MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED
PLUME IS USED TO REFINE DEPICTED BORON EXTENT
BORON PLUME GREATER THAN BACKGROUND VALUE (50 Ng/L)
FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL
PREDICTED PLUME IS USED TO REFINE DEPICTED BORON
EXTENT
w
a 808
816 ♦
824 ®,�.
»
`I\
Y,
"
832
■ +
♦♦
�
DUKE
GRAPHIC SCALE
250 125 0 250 500
ENERGY
-.
� ♦ �
Cam,
(IN FEET)
I .
�♦ �•
♦
/
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/17/2019
♦ �♦
■ ■ _ ■ �♦
CHECKED BY: T. GRANT DATE: 12/17/2019
B 1 D
MW-24D /
°J <50 - -
APPROVED BY: T.GRANT DATE:12/17/2019
PROJECT MANAGER: S. SPINNER
0
Terra
syn
www.synterracorp.com
ASH BASIN WASTE BOUNDARY
■ ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA BOUNDARY
■ DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (8- INTERVAL)
GENERALIZED GROUNDWATER FLOW DIRECTION
STREAM (AMEC NRTR)
® WETLANDS (AMEC NRTR)
,- APPROXIMATE HYDROLOGIC DIVIDE
® AREA UNDER FURTHER INVESTIGATION
NOTES
1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS
BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN
JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATA SETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L STANDARD FOR BORON IS 700 pg/L.
3. THE BACKGROUND VALUE FOR BORON IN THE DEEP FLOW ZONE IS 50 pg/L (AS
SUBMITTED JUNE 2019).
4. THE 02L STANDARD OF 700 pg/L IS USED AS COMPARISON CRITERIA FOR BORON IN
THE DEEP FLOW ZONE.
5. --VALUE NOT AVAILABLE
6. GROUNDWATER FLOW AND TRANSPORT BORON PLUME SIMULATION IS FROM MODEL
LAYER 15 (FALTAAND OTHERS, 2019; MODEL OUTPUT PRODUCED OCTOBER 2019).
7. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018)AND FLOW AND
TRANSPORT MODELING REPORT (FALTAAND OTHERS, 2019).
8. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
9. NRTR - NATURAL RESOURCES TECHNICAL REPORT
10. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT
BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR
BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATA SITE AT
hftps://sdd.nc.gov/sdd/DataDownload.aspx.
11. ALL BOUNDARIES ARE APPROXIMATE.
12. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
13. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON DECEMBER
17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
14. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
RIPS 3200 (NAD83).
FIGURE 6-18b
ISOCONCENTRATION MAP
BORON IN DEEP FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

♦ ♦ 712 >pq 696 664
�2
8
76B
784
>92
41
a
�j
6
so
s s
's
dr,
F
♦ ♦, sus
792
792
\
� \ 1
824
8
s B76
N
808
N y
o
vl-6AAA \
�. 688
672 MW-25DR
�+ <50
MW-20DR ,.
��♦! 664 GWA-216R ■ ` r 175 I 664
696
�� • r 133
�+ ♦ GWA-21BRL
AS-26R 656
213 1
418 A s,GWA-28BR OS 116R0
AS-9BR <50 GWA-64BRL 1
I I e
AS-86R <50 AS-5BR ■ 236 MW-11BRL R
12� W-2DA 43 <50 1 38 '
<50 ■ CCR-3BR
♦ 1 12 AB-16ROR 1
72-7BRB AS-66RA 397 CCOR-17BR
GWA-546R0
92 <50
>6 AS-76RL ♦ �i92
r w M W-21 BR
♦�♦ GWA-626R 5 3A-596R
> �♦r ♦ r ` � � <50
307 36
♦ 4 � N �44
•
• GWA 33BR GWA-58BR GWA-656R
160 366 381 ^ cGoo
�j
s
o N
IQ
876 CCR-86R
901
AB-86R
336
wN
•
808 R
g2A `
�AB-76R r�
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ENERGY
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DRAWN BY: C. DAVIS DATE: 06/13/2019
♦1000,REVISED BY: C. DAVIS DATE: 12/17/2019
�♦ �� CHECKED BY: T. GRANT DATE: 12/17/2019
/ APPROVED BY: T. GRANT DATE: 12/17/2019
Q/1'1Terra PROJECT MANAGER: S. SPINNER
"i ■ www.synterracorp.com
LEGEND
ASSESSMENT MONITORING WELL - GREATER THAN 02L
STANDARD (700 Ng/L)
ASSESSMENT MONITORING WELL - GREATER THAN
CONSTITUENT BACKGROUND VALUE (50 Ng/L)
ASSESSMENT MONITORING WELL - LESS THAN BACKGROUND
VALUE
BACKGROUND MONITORING WELL
BORON PLUME GREATER THAN 02L STANDARD (700 pg/L) FROM
MEAN ANALYSIS. FLOW AND TRANSPORT MODEL PREDICTED
PLUME IS USED TO REFINE DEPICTED BORON EXTENT
BORON PLUME GREATER THAN BACKGROUND VALUE (50 Ng/L)
FROM MEAN ANALYSIS. FLOW AND TRANSPORT MODEL
PREDICTED PLUME IS USED TO REFINE DEPICTED BORON
EXTENT
ASH BASIN WASTE BOUNDARY
■ ASH BASIN COMPLIANCE BOUNDARY
ASH STORAGE AREA BOUNDARY
■ DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (8' INTERVAL)
GENERALIZED GROUNDWATER FLOW DIRECTION
STREAM (AMEC NRTR)
WETLANDS (AMEC NRTR)
APPROXIMATE HYDROLOGIC DIVIDE
® AREA UNDER FURTHER INVESTIGATION
NOTES:
1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS
BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN
JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATA SETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L STANDARD FOR BORON IS 700 pg/L.
3. THE BACKGROUND VALUE FOR BORON IN THE BEDROCK FLOW ZONE IS 50 pg/L (AS
SUBMITTED JUNE 2019).
4. THE 02L STANDARD OF 700 pg/L IS USED AS COMPARISON CRITERIA FOR BORON IN
THE BEDROCK FLOW ZONE.
5. --VALUE NOT AVAILABLE
6. GROUNDWATER FLOW AND TRANSPORT BORON PLUME SIMULATION IS FROM MODEL
LAYER 17 (FALTAAND OTHERS, 2019; MODEL OUTPUT PRODUCED OCTOBER 2019).
7. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018)AND FLOW AND
TRANSPORT MODELING REPORT (FALTAAND OTHERS, 2019).
8. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
9. NRTR - NATURAL RESOURCES TECHNICAL REPORT
10. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT
BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR
BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATA SITE AT
hftps://sdd.nc.gov/sdd/DataDownload.aspx.
11. ALL BOUNDARIES ARE APPROXIMATE.
12. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
13. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON DECEMBER
17, 2019. AERIAL IMAGE COLLECTED ON FEBRUARY 25, 2019.
14. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
RIPS 3200 (NAD83).
FIGURE 6-18c
ISOCONCENTRATION MAP
BORON IN BEDROCK FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

t•.1
♦ + ♦ J`7
1 �
A
41 Ci> DUKE
-♦ Z ENERGY
synTerra
(IN FEET)
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
CHECKED BY: T. GRANT
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
LEGEND
FIGURE 6-19a
ISOCONCENTRATION MAP
COBALT IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/17/2019
DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/17/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
P.Com

F7Z
6A
DUKE
' ENERGY
rr
♦,
(IN FEET)
♦
DRAWN BY: C. DAVIS
7 ♦ �
REVISED BY: C. DAVIS
♦.
CHECKED BY: T. GRANT
APPROVED BY: T. GRANT
- - 1001,
svnTeiid
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LEGEND
NOTES:®
- I FIGURE 6-19b
ISOCONCENTRATION MAP
COBALT IN DEEP FLOW ZONE
DATE: 06/13/2019
DATE: 12/16/2019
ACTIVE ASH BASIN
DATE: 12/16/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/16/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
p.Com

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At-
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i
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.` ♦ �� / REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
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FIGURE 6-20a
ISOCONCENTRATION MAP
IRON IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

i
'-
\f,f♦f♦ C
0
_
A
•� ' i LEGEND
NOTES:
.�''�
FIGURE 6-20b
,; C( N DUKE
L' ENERGY
CAROUNAS
(IN FEET)
ISOCONCENTRATION MAP
.� /.
_ •♦ �.
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
IRON IN DEEP FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
/
sWTerra
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER:S.SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
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A
IWE
/r
DUKE
ENERGY
i' c
-� synTena
(IN FEET)
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
CHECKED BY: T. GRANT
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
LEGEND
0
-
FIGURE 6-20c
ISOCONCENTRATION MAP
IRON IN BEDROCK FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/16/2019
DATE: 12/16/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/16/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
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,
0
I Qp '
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i
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. (IN FEET)
0
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', ■ ■ ♦ - - �♦
/
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED B T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
♦
s(�/�'�
' e�
www.synterracorp.com
LEGEND
0
NOTES:®
FIGURE 6-21a
ISOCONCENTRATION MAP
LITHIUM IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

♦El
R 1
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(IN FEET)
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APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
i�
END
o
NOTES:®
-
FIGURE 6-21b
ISOCONCENTRATION MAP
LITHIUM IN DEEP FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/16/2019
DATE: 12/16/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/16/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
P.Com

t•.1
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ASH
;R,' STORAGE AREAL
ACTIVE
- ASH BASIN
,I
I
1.0
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Z ENERGY
\ , ♦ c (IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/17/2019
♦♦
j
��
CHECKED BY: T. GRANT DATE: 12/17/2019
APPROVED BY: T. GRANT DATE: 12/17/2019
synTerra
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-21c
ISOCONCENTRATION MAP
LITHIUM IN BEDROCK FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

i
0 r1
r'� l
i
I
I
■ i
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DUKE
• ' ENERGY
• (IN FEET)
�• ♦, DRAWN BY: C. DAVIS DATE: 06/13/2019
•�� ' �� / 1 REVISED BY: C. DAVIS DATE: 12/16/2019
_ . _ ♦ - CHECKED BY: T. GRANT DATE: 12/16/2019
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s(�/�'� PROJECT MANAGER: S. SPINNER
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NOTES:
i�
FIGURE 6-22a
ISOCONCENTRATION MAP
MANGANESE IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

r_
A
r
m
1 � '
<t
(> DUKE
ENERGY
CAROUNAS (IN FEET)
4'
nTena
7A
LEGEND
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
FIGURE 6-22b
ISOCONCENTRATION MAP
MANGANESE IN DEEP FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
IM,

r_
A
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1 ®F-1
1
1
i
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(> DUKE
ENERGY
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10
nTena
(IN FEET)
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
CHECKED BY: T. GRANT
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
LEGEND
-- o
NOTES:
- I FIGURE 6-22c
ISOCONCENTRATION MAP
MANGANESE IN BEDROCK FLOW ZONE
DATE: 06/13/2019
DATE: 12/16/2019
ACTIVE ASH BASIN
DATE: 12/16/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/16/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
p.Com

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Qp
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ENERGY
10
nTena
i�
NOTES:
(IN FEET)
FIGURE 6-23a
ISOCONCENTRATION MAP
STRONTIUM IN SHALLOW FLOW ZONE
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
ACTIVE ASH BASIN
CHECKED BY: T. GRANT DATE: 12/16/2019
CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
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LEGEND
ACTIVE
ASH
■
BASIN
i�
JJ
t
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'
# Ci> DUKE
�Z ENERGY
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/17/2019
�j♦♦ �� CHECKED BY: T.GRANT DATE: 12/17/2019
APPROVED BY: T. GRANT DATE: 12/17/2019
� synTerrd PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-23b
ISOCONCENTRATION MAP
STRONTIUM IN DEEP FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

r_
® =
0
10
I 1
(> DUKE
ENERGY
CAROUNAS
10
nTena
1
(IN FEET)
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
CHECKED BY: T. GRANT
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
R
LEGEND
o
NOTES:
- I FIGURE 6-23c
ISOCONCENTRATION MAP
STRONTIUM IN BEDROCK FLOW ZONE
DATE: 06/13/2019
DATE: 12/16/2019
ACTIVE ASH BASIN
DATE: 12/16/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/16/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
p.Com

t•.1
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ENERGY
c:-
DRAWN BY: C. DAVIS
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PROJECT MANAGER: S. SPINNER
LEGEND
w
M
NOTES:
-
FIGURE 6-24a
ISOCONCENTRATION MAP
SULFATE IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/18/2019
DATE: 12/18/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/18/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
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PROJECT MANAGER: S. SPINNER
_ LEGEND
r IWA
-
FIGURE 6-24b
ISOCONCENTRATION MAP
SULFATE IN DEEP FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/17/2019
DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/17/2019
Ll
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
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r.
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(IN FEET)
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REVISED BY: C. DAVIS DATE: 12/19/2019
CHECKED BY: T. GRANT DATE: 12/19/2019
APPROVED BY: T. GRANT DATE: 12/19/2019
PROJECT MANAGER: S. SPINNER
NOTES:
FIGURE 6-24c
ISOCONCENTRATION MAP
SULFATE IN BEDROCK FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

M,IAPREA
DUKE
n ENERGY
c;-
1161
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
Ll
NOTES:
FIGURE 6-25a
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

,
F=7
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dam'
CCCj NOTES:
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t
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1.0
Ci> DUKE
♦ Z ENERGY
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0
FIGURE 6-25b
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN DEEP FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

�> DUKE
ENERGY
CAROLINAS
(IN FEET)
DRAWN 8Y: C. DAVIS
REVISED 8Y: C. DAVIS
DATE: 06/13/2019
DATE: 12/18/2019
CHECKED BY: T. GRANT
DATE: 12/18/2019
APPROVED BY: T. GRANT
DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
WnTerm
www.synterracorp.com
NOTES:
FIGURE 6-25c
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN BEDROCK FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

All,
♦
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♦f
♦f♦ f♦ f♦f
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1.0
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(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
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CHECKED BY: T. GRANT DATE: 12/19/2019
APPROVED BY: T. GRANT DATE: 12/19/2019
PROJECT MANAGER: S. SPINNER
Wed
FIGURE 6-26a
ISOCONCENTRATION MAP
THALLIUM IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

❑❑
c:::; -,-
All,
♦
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♦f
♦f♦ f♦ f♦f
o=E
ACTIVE
ASH BASIN
i
Ci> DUKE
ENERGY
.-f
(IN FEET)
LEGEND
I �
NOTES:
♦ .
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/19/2019
�j♦♦
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CHECKED BY: T.GRANT
APPROVED BY: T. GRANT
DATE:
DATE:
12/19/2019
12/19/2019
.
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FIGURE 6-26b
ISOCONCENTRATION MAP
THALLIUM IN DEEP FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

L � �
A
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um
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.& DUKE
' ENERGY
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116vip
synTena
(IN FEET)
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
CHECKED BY: T. GRANT
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
LEGEND
NOTES:
-
FIGURE 6-27a
ISOCONCENTRATION MAP
TOTAL URANIUM IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/17/2019
DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/17/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
P.Com

UNIT 6
IS
A
0
(> DUKE
ENERGY
C:.
DRAWN BY: C. DAVIS DATE: 06/13/2019
10 REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
nTeiid
www.synterracorp.com
LEGEND
O
FIGURE 6-27b
ISOCONCENTRATION MAP
TOTAL URANIUM IN BEDROCK FLOW ZONE
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

;�❑❑; ,
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APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
LEGEND
0
7q
-
FIGURE 6-28
ISOCONCENTRATION MAP
VANADIUM IN SHALLOW FLOW ZONE
ACTIVE ASH BASIN
DATE: 06/13/2019
DATE: 12/17/2019
DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
DATE: 12/17/2019
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
P.Com

Note:
* - Sampling events prior to
1/1/2018
Surface Water Legend
•
SW-SC-1*
A
SW-SC-2*
SW-SC-3*
♦
SW-SC-4*
Z
SW-SC-5*
*
SW-SC-6*
❑
SW-SC-6A
O
SW-2
A
SW-3
� a\o
00 �a Source Water Legend
Affected 0SW-7*
• Active Ash Pond*
Potential D�
Mixing - r
�0 �Oo\a
Generally
Unaffected
20% OV,$X
1'00 60. Boa
O O O
�— Ca
Vol"
00
C� 80%
o\°
SV 60% �O
\4
Cow Oo
40%
�o\o 10
20%
moo ry10 �10 �(30 �o\0
O
Cl
Seeps Legend
■
S-14*
•
S-21*
A
S-15*
S-16*
♦
S-27*
Z
S-31*
'>k
S-8
DRAWN BY: R. Badum DATE: 10/18/2019 FIG
� DUKE REVISED BY: R. Badum
ENERGY CHECKED BY: T. Grant
APPROVED BY: T. Grant
PROJECT MANAGER: S. Spinner
47
synTerra www.synterracorp.com
URE 6-29 aa
>EEP AND SURFACE WATER QUALIT
PIPER DIAGRAMS - SUCK CREEK
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Note:
* - Sampling events prior to
1/1/2018
Surface Water Legend
■
SW-4
•
SW-BRAB-1
`
SW-BRAB-2
V
SW-BRAB-3*
♦
SW-10A*
Z
SW-10B*
*
SW-10C*
�
00
o`o
�o
Source Water Legend
Affected
60 =
■ SW-7*
`
V °
o\o�
cow CO,
• Active Ash Pond
x
D
Potential
Mixing
�J00
O�o
r •
`�'
Seeps Legend
■ S-4
• S-6
Generally
Unaffected
,E
,
A S-]
❑ SW-BRU14-3*/40%A
20�
10o 00o
0 0 0
�— Ca
r Oa
00 0 80%
� x It
Ucp Apo
■ 60% 'O
oho � 6s sr
■ 40%\
aka CPO"
. L 20%
moo ryO�o �o�o ��\Q �o�o
0
Cl ---go
DRAWN BY: R. Badum DATE: 10/18/2019
4� DUKE REVISED BY: R. Badum
ENERGY CHECKED BY: T. Grant
APPROVED BY: T. Grant
PROJECT MANAGER: S. Spinner
47
synTerra www.synterracorp.com
FIGURE 6-29b
>EEP AND SURFACE WATER QUALIT
PIPER DIAGRAMS — BROAD RIVER
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Note:
*sampling events prior
to 1/1/2018
Beneath Source Legend
■ AB-0113ROR ♦ AB-06BR
i A13-02BRO Z AB-07BR v.
A AB-04BR * AB-08BR COO " °
Water Supply Well Legend V AB-05BR LiAB-09BR/
0
■ C1 Well 2* 0 C-1005 W3*
II 3* • C1 W
O C-1006: 2910 Fox Place* oQ
e
Affected r V
cle
Potential
Mixing o
Generally Z
Unaffected
V*
\0
ZO%O
2% C
Coo 00.
0 0 0
.� Ca
80%
I
�.� 60%
/40%
Z V
20%
V
■ z� z
b. S.
0
�— C a
0%
o\13 V Vve
■ V
WW •
Beneath Source
— Cl ---Ip
Background Monitoring
Well Legend
o\° c\o c\° o
ryo �o o0
Upgradient of — Cl
■ CCR-17BR
Source
• GWA-48BR
MW-21BR
BG-01S
GWA-24S
GWA-25S
BG-01D
GWA-24D
GWA-24BR
MW-22BR
MW-22DR
MW-24DR
Downgradient of Source,
Near or Beyond Compliance
Boundary Legend
1 AS-02BR a GWA-21BRL
• AS-05BR O GWA-33BR
A AS-06BRA b GWA-54BRO
AS-07BRB p MW-02DA
AS-0813R <�, MW-20DR
Z AS-09BR g MW-23DR
* GWA-2113R * MW-25DR
Downgradient of
Source Legend
■
CCR-03BR
*
GWA-57BR
•
CCR-08BR
❑
GWA-58BR
A
CCR-12BR
O
GWA-59BR
T
GWA-20BR
GWA-64BRL
GWA-27BR
p
GWA-66BRL
Z
GWA-28BR
MW-11BRO
o° s Affected
�o
Potential
Mixing
Generally
Unaffected
� Apo
GO 80%
o� ZO a 60% �O
p w 601.
•
v 40%
°\° �O ■ V
Co 20
041
o\13 O\° 0 O
p
Cl � s
Downgradient of Source

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 6-31
Pourbaix Diagram for Iron -Water System
Included in Section 6 text

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 6-32a
Remedial Alternative 2 - System Layout
- Groundwater Remediation by
Extraction combined with Clean Water
Infiltration and Treatment
Provided in separate electronic figure file as a
large sheet size

FINISHED
PRESSURE CONTROL VALVE
MAGNETIC FLOW METER
PRESSURE GAUGE --
VAULT LID WITH
CHANNEL FRAME
FLOW SHUTOFF
SOLENOID
-_----VALVE
----(NORMALLY
AIR VENT BALL VALVE'
♦FLOWCONCRETE ULT
�TER LEVEL SENSOR�_�__— WELL SEAL I —SS FLANGE
/ D
DRAIN'
CAP
P/X�C/A/I/NG
CK BEDDING w/COMPRESSIONS C E N/ R ALIZERWELL HEAD PESSURE
a MONITORING TRANSDUCER
d�F GROUNDWATER
I a
WELL PIPE GUIDES
I °
LEVEL
a
a
CONTROL SENSOR CABLE
/ ® CEMENT WITH 5 % BENTON
6" WELL SCREEN
THREADED JOINT
F1Z" tSVKtKVLt
11;
WELL CASING
r
MAGNETIC FLOW METER
SIGNAL FROM:
LOW LEVEL SHUT-OFF SENSOR
VAULT WATER LEVEL SENSOR
I INSTRUMENTATION CONDUIT
SIGNAL FROM:
FLOW SHUTOFF SOLENOID
MAGNETIC FLOW METER
PRESSURE CONTROL VALVE
WELL HEAD PRESSURE TRANSDUCEf
INSTRUMENTATION
CONDUIT HEADER
ELE%�/����
) OPENING (TYP.)�/
iECHARGE PIPE, 1' HDPE
/RECHARGE HEADER PIPE
NOT FOR CONSTRUCTION/
FIGURE 6-32b
DUKE
ENERGY
NOT TO SCALE
REMEDIAL ALTERNATIVE 2
CONCEPTUAL VERTICAL CLEAN WATER INFILTRATION
WELL SCHEMATIC
DRAWN BY: J. CHASTAIN DATE:12/21/2019
CAROLINAS
GROUNDWATER REMEDIATION BY EXTRACTION
REVISED BY: DATE:-
APPROVDBY: J.. CLEMER DATE: 12/21/2019
APPROVED BY:1. CLEMMER DATE: 12/21/2019
PROJECT MANAGER: S. SPINNER
COMBINED WITH CLEAN WATER INFILTRATION AND
TREATMENT
ACTIVE ASH BASIN
WnTena
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
www.synterracorp.com

REMOVABLE WATER TIGHT SEAL
(CLEAN -OUT) WITH AIR VENT
LT
GROUND SURFACE
WELL CASING
GENERALLY BASED ON INFORMATION FROM ELLINGTON, DTD
BASED ON INFORMATION FROM DUKE ENERGY CAROLINAS
VEHICLES USING THE PLANT ROADS WHERE EXTRACTION AND
INFILTRATION WELLS WILL BE LOCATED ARE LIMITED TO LESS
THAN 6,000 LBS AND SPEEDS LESS THAN 25 MPH. WELL
VAULTS IN THE ROAD MUST BE RATED AS H2O ENCLOSURES.
LOW LEVEL SHUT-OFF SENSOR AND
PRESSURE TRANSDUCER REPOSITIONED
WELL SCREEN
DUKE
ENERGY
NOT TO SCALE
CAROLINAS
DRAWN BY: J. CHASTAIN DATE: 12/21/2019
REVISED BY: DATE: -
CHECKED BY: J. CLEMMER DATE: 12/21/2019
APPROVED BY: J. CLEMMER DATE: 12/21/2019
PROJECT MANAGER: C. SUTTELL
synTerra
www.synterracorp.com
VAULT (SEE FIGURE 6-25b) FOR
WELL CONTROLS WITH VERTICAL
SENORS IN THE HORIZONTAL
WELL REPOSITIONED
CLEAN WATER
INFILTRATE SUPPLY LINE
WELL CASING WITH TYPICAL CONSTRUCTION ANGLE
OF 12° FROM HORIZONTAL GROUND SURFACE
NOT FOR CONSTRUCTION
FIGURE 6-32c
REMEDIAL ALTERNATIVE 2
CONCEPTUAL HORIZONTAL CLEAN WATER
INFILTRATION WELL SCHEMATIC
GROUNDWATER REMEDIATION BY EXTRACTION
COMBINED WITH CLEAN WATER INFILTRATION AND
TREATMENT
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

VAULT LID WITH
CHANNEL FRAME
MAGNETIC FLOW M
FINISHED GRADE\ PRESSURE GAUGE\
SAMPLE VALVE,,
MANUAL FLOW
CONTROL VALVE
/ SUBMERSIBLE PUMP V V FLOW
MAGNETIC FLOW METER y
WELL CAP \� --- ---- — d
CONCRETE VAULT
SS FLANGE
LT WATER LEVEL SENSOR
j ROCK BEDDING IIII
II
I
CASING CENTRALIZER
(IMATE LEVEL CONTROL SENSOR CABLES
TABLE
HIGH LEVEL CONTROL SENSOR a III
III
A / a III
ELL PIPE GUIDES
BOREHOLE
C Si
L CASNG
lFfl I(]INTS
LEVEL CONTROL SENSOR
LEVEL CONTROL SENSOR
SIGNAL FROM:
MAGNETIC FLOW METER
—'111PRESSURE TRANDUCER
INSTRUMENTATION
CONDUIT HEADER
LE
,
/,CONDUIT AL
° SEALED OPENING (TYP.) j//�
DISCHARGE PIPE, T' HDPE
:LOW
j/ PIPE
WATER LEVEL PRESSURE TRANSDUCER CABLE/
I7 I
6" WELL SCREEN
THREADED JOINT
I WELL PUMP POWER CABLE
LOW -LOW SHUT-OFF SENSORSAI
I
II
I
I�
I
WATER LEVEL PRESSURE TRANSDUCER
SUBMERSIBLE WELL PUMP
"FOR CONSTRUCTION
FIGURE 6-32d
DUKE NOT TO SCALE REMEDIAL ALTERNATIVE 2
ENERGY CONCEPTUAL VSCHEMATIC EXTRACTION WELL
CAROLINAS DRAWN BY: J. CHASTAIN DATE:12/21/2019 GROUNDWATER REMEDIATION BY EXTRACTION
REVISED BY: DATE:- COMBINED WITH CLEAN WATER INFILTRATION AND
APPROVDBY: J.. CLEMER DATE: 12/21/2019 TREATMENT
APPROVED BY:1. CLEMMER DATE: 12/21/2019
PROJECT MANAGER: S. SPINNER ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
synTena www.synterracorp.com CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

36" MIN
AGGREGATE OR TOPSOIL TO
/MATCH EXISTING SURFACE
FABRIC
6" MAGNETIC LOCATION TAPE
12" DEEP
_CLASS II BACKFILL
(EXISTING FILL MAYBE USED IF ACCEPTABLE)
INTAIN VERTICAL
SLOPED FACE
MINIMUM 4" SEPARATION BETWEEN PIPES
CLASS I BEDDING
6" MIN ELECTRICAL CONDUIT
ELECTRICAL CONDUIT
O O"or,
HDPE CLEAN WATER OR
GROUNDWATER CONVEYANCE
6" +MIN
1
4" MIN
24" MIN
4" MIN
NOTES:
1. 4" MINIMAL HORIZONTAL SEPARATION BETWEEN ALL PIPE
AND CONDUIT.
2. 6" VERTICAL SEPARATION WHEN CROSSING OVER ALL PIPE
AND CONDUIT.
3. 36" MINIMUM COVER FOR ALL PIPE AND CONDUIT.
4. PLACE BACKFILL AND FILL SOIL MATERIALS IN LAYERS NOT
MORE THAN 8" IN LOOSE DEPTH FOR MATERIAL COMPACTED
BY HEAVY COMPACTION EQUIPMENT AND NOT MORE THAN 4
INCHES LOOSE DEPTH FOR MATERIAL COMPACTED BY HAND
OPERATED TAMPERS.
5. PLACE BACKFILL AND FILL MATERIALS EVENLY ON ALL
SIDES OF STRUCTURES TO REQUIRED ELEVATIONS AND
UNIFORMLY ALONG THE FULL LENGTH OF EACH STRUCTURE.
6. COMPACT SOIL MATERIALS TO NOT LESS THAN 95
PERCENT OF MAXIMUM DRY UNIT WEIGHT ACCORDING TO
ASTM D 698.
4*DUKE
ENERGY
NOT TO SCALE
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:12/26/2019
REVISED BY: DATE: -
CHECKED BY: J. CLEMMER DATE: 12/26/2019
APPROVED BY: J. CLEMMER DATE: 12/26/2019
PROJECT MANAGER: S. SPINNER
synTero
www.synterracorp.com
NOT FOR CONSTRUCTION
FIGURE 6-32e
REMEDIAL ALTERNATIVE 2
CONCEPTUAL PIPELINE TRENCH DETAIL
REMEDIATION BY EXTRACTION COMBINED WITH
CLEAN WATER INFILTRATION AND TREATMENT
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

1 -
MODEL TIMEFRAME: • �, �. ' `�
SYSTEM STARTUP `•® ' • 1
AND OPERATION % , • I
' ,
NEESE
r
I
u AAAAA ;
mm
1
• • 1
:, ' 1
1
MODEL TIMEFRAME:
APPROXIMATELY 2 YEARS
AFTER SYSTEM STARTUP
AND OPERATION
• y r ' • , ` •
•
� % • , _ MODEL TIMEFRAME:
4011, TIMEFRAME: I IAPPROXIMATELY 10 YEARS
APPROXIMATELY 5 YEARS
• 1 AFTER SYSTEM STARTUP
u I 1 AND OPERATION
1 AFTER SYSTEM STARTUP
• • • • • • • • AND OPERATION
At
I 1
, �,,'
44-
♦ I
I • ,%
♦ r
I r
LEGEND ' 1
Q PROPOSED EXTRACTION WELL PROPOSED CLEAN WATER HORIZONTAL NOTES: ONE MAP ON DECEMBER n, 2019. AERIAL IMAGE COLLECTED > DUKE
INFILTRATION WELL ON FEBRUARY 25, 2019. GRAPHIC SCALE
. 1. THE WATERS OF THE US DELINEATION HAS NOT BEEN FIGURE 6-32f
PROPOSED CLEAN WATER INFILTRATION WELL APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE 6. DRAWING HAS BEEN SET WITH PROJECTION OF NORTH 600 300 0 600 1,200
BORON PLUME GREATER THAN THE USEPA
ASH BASIN WASTE BOUNDARY TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE USED CAROLINA STATE PLANE COORDINATE SYSTEM RIPS 3200 ENERGY REMEDIAL ALTERNATIVE 2- SIMULATED BORON CONCENTRATION IN
DRINKING WATER EQUIVALENT LEVEL (4000pg/L) — • — • ASH BASIN COMPLIANCE BOUNDARY WETLAR�DSDANDSTREAms BOUNDARIEPURPOSES.
WE ESOBTA OBTAINED (NADB3). CAROLINAS (IN FEET) ALL FLOW ZONES - GROUNDWATER REMEDIATION BY EXTRACTION
FROM MEAN ANALYSIS. FLOW AND TRANSPORT FROM STREAM AND WETLAND DELINEATION CONDUCTED BY
MODEL PREDICTED PLUMEW ANDUSETRANSPORT
REFINE - DUKE ENERGY CAROLINAS PROPERTY LINE AMINFCFOSTER WHEEL R ENVIROUNE NMENTAL AND DRAWN BY: C. DAVIS DATE: 06/13/2019 COMBINED WITH CLEAN WATER INFILTRATION AND TREATMENT
DEPICTED BORON EXTENT )P STREAM (AMEC NRTR) REVISED BY: C. DAVIS DATE: 12/18/2019
2. NRTR -NATURAL RESOURCES TECHNICAL REPORT ACTIVE ASH BASIN
BORON PLUME GREATER THAN NC 02L ® CHECKED BY: T. GRANT DATE: 12/18/2019WETLANDS (AMEC NRTR) 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CORRECTIVE ACTION PLAN UPDATE
STANDARD (700 pg/L) FROM MEAN ANALYSIS. cAROLINAs. APPROVED BY: T. GRANT DATE: 12/18/2019 CLIFFSIDE STEAM STATION
FLOW AND TRANSPORT MODEL PREDICTED 4. ALL BOUNDARIES ARE APPROXIMATE. PROJECT MANAGER: S. SPINNER
PLUME IS USED TO REFINE DEPICTED BORON sm errs MOORESBORO, NORTH CAROLINA
_..__.._ 5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ......... ......+......,.,.... ,.,.....

SODIUM
HYPOCHLORITE
FEED
POLYMER FEED
EXISTING FIRE
SUPPRESSION
SYSTEM
RAPID
SEDIMENTATION
FILTRATION
MIX
BASIN
RAPID
SEDIMENTATION
FILTRATION
AL MIX
BASIN
POLYMER
FEED
SODIUM
HYPOCHLORITE
FEED
Not to Scale
I
I
I
I
I
I
DRAIN AND
SOLIDS
REMOVAL
I
I
I
I
I
FILTRATE TO
W WTP
i
HOLDING CCD
TANK
I
HOLDING I
TANK
I
I
i I
------------------_-----
PRESSURE GAUGE AND SHUTOFF VALVE AT EACH WELL HEAD
CLEAN WATER
INFILTRATION WELLS
DECHLORINATION
40
X0
z+
GRAVITY
----���� FEED
NOTE: PUMP AS NEEDED
LEGEND
HH - High high
H - High low
L — Low
ECD Flow totalizer
o
I Pressure gauge
Check valve
>7< Three-way valve
®
COQ
CD
Rotameter
Ball valve, normally open
Diaphragm valve, normally open
DUKE
CAROLINA$
DRAWN BY: T. COLTON DATE: 11/4/2019
REVISED BY: B. GREEN
CHECKED BY: T. GRANT
APPROVED BY: J. CLEMMER
PROJECT MANAGER: S. SPINNER
1 V-JJ
CONCEPTUAL PROCESSIVVI\L FLOW DIAGRAM
GROUNDWATER CLEAN WATER
INFILTRATION SYSTEM
ACTIVE ASH BASIN
TYP - Typical
sP Sampling port
Ball valve, normally
I
H
Diaphragm valve, normally closed
-7
syrlTerra
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
r www.synterracorp.com
Closed
I
MOORESBORO NORTH CAROLINA

EXTRACTION
WELLS
EXISTING
WASTEWATER
TREATMENT PLANT
Not to Scale
EXISTING BASEMENT
BASIN (HOLDING CELL)
LEGEND
�
®
Rotameter
DUKE
DRAWN BY: T. COLTON DATE: 10/17/2019
REVISED BY: B. GREEN
FIGURE 6-34
CONCEPTUAL PROCESS FLOW DIAGRAM
HH - High high
EjD:1 Flow totalizer
Check valve
DC�
Ball valve, normally open
CAROLINAS
CHECKED BY: T. GRANT
GROUNDWATER EXTRACTON AND
H - High low
o
Three-way
APPROVED BY: J. CLEMMER
PROJECT MANAGER: S. SPINNER
TREATMENT SYSTEM
ACTIVE ASH BASIN
L — Low
T Pressure gauge
valve
Diaphragm valve, normally open
TYP -Typical
SP Sampling port
Ball valve, normally
H
Diaphragm valve, normally closed
1617
synTerra
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STREAM STATION
www.synterracorp.com
closed
MOORESBORO, NORTH CAROLINA

Submit CAP to NCDEQ (1 day)
NCDEQ Review and Comment Period (90 days)
Duke Energy Responds to CAP Comments (60 days)
CAP Approved by NCDEQ (1 day)
Implement Effectiveness Monitoring Plan (30 days)
Submit Pilot Test Work Plan and Associated Permit Applications to NCDEQ (30 days)
Implement Quarterly Progress Reporting to NCDEQ (30 days)
Permit Applications Approved by NCDEQ (60 days)
Conduct Pilot Test (182 days)
Submit Detailed Design and Specifications Report (182 days)
Review Design Report with NCDEQ (1 day)
Bid documents, Procurement, Permitting (182 days)
Installation of Full -Scale Groundwater Remediation System (243 days)
System Start -Up and Optimization (90 days)
Submit As -Built Construction and Start -Up Information Report (90 days)
Notes:
* - Either submittal of the Effectiveness Monitoring Plan or
the pilot test work plan and permit applications (as
applicable) will fulfill section G.S.130A-309.209.(b)(3).
** - Actual time may vary due to a variety of factors
including agency review and approvals, weather delays,
equipment availability, etc.
Ongoing System Operation
Days
0 150 300 450 600 750 900 1050 1200 1350
I��
MWER,
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DUKE
4N DUKE
BY: R. ISHAM DATE: 12/5/2019
REVISED BY:
r ENERGY
CHECKED BY: S. WOOD
CAROLINAS
APPROVED BY: T.GRANT
PROJECT MANAGER: S. SPINNER
1,
synTerra www.synterracorp.com
FIGURE 6-35
CAP IMPLEMENTATION GANTT CHART
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

MCCRgW R0
FORMER
UNITS 1-,4 BROAD RIVER
SH BASIN x
3
NOTES:
i'
FIGURE 6-36
(> DUKE ENERGY (IN FEET) EFFECTIVENESS MONITORING WELL NETWORK
CAROLINAS AND FLOW PATHS
DRAWN BY: C. DAVIS DATE: 06/13/2019 ACTIVE ASH BASIN
REVISED C. DAVIS DATE: 12/26/2019
CHECKEDB
CHECKED BY: T. GRANT DATE: 12/26/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: T. GRANT DATE: 12/26/2019 CLIFFSIDE STEAM STATION
S. SPINNER
��1e� PROJECT MANAGER: Synterracorp.COYII �'7" MOORESBORO, NORTH CAROLINA

Interim
Monitoring Plan Corrective Action
(IMP) sampling Plan Approval
Effectiveness Monitoring Plan (EMP)
monitor downgradient and
background groundwater in
accordance with G.S. 130A-
309.214(a)(4)k for compliance with
NCAC 02L .0202 Groundwater Quality
applicable Standards
Based on
annual evaluation, Yes
is the remedial
system performance
effective?
m
Adjust remedial system
components; continue with EMP
or
Implement contingency plan in
accordance with CAP Update
Section 6.8.8; continue with EMP
Notes:
NCAC - North Carolina Administrative Code
02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and
Standards
No
Continue EMP sampling and Continue PCMP sampling
Annual Review and and Annual Review and
Reporting I I Reporting
Is the ash basin
certified closed?
No
Are the groundwater
monitoring results
below applicable
standards at the
compliance boundary
for three years?
Yes
Post -Closure Monitoring Plan (PCMP)
Post -closure monitoring to begin
Yes following closure certification.
Monitoring parameters and locations
to be determined at that time and in
accordance with G.S. 130A-
309.214(a)(4)k.2.
Yes
Based on \
annual evaluation,
is the plume stable
at the compliance
boundary?
Request completion of active remediation
or
Request completion of PCMP post -closure monitoring
in accordance with G.S. 130A-309.214(a)(3)b
DUKE
tENERGY
DRAWN BY: T. PLATING
REV ISHECK SED BY: J. WYLIE &
K
DATE: 10/112019
DATE: 12/16/2019
PROGRESS
CHECKED BY: T. GRANT
DATE: 12/16/2019
APPROVED BY: S. SPINNER
DATE: 12/16/2019
410
PROJECT MANAGER: S. SPINNER
synTena
I www.synterracorp.com
No
FIGURE 6-37
EFFECTIVENESS MONITORING PLAN
WORK FLOW AND
OPTIMIZATION FLOW DIAGRAM
ACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Submit
Request for
Termination
Request shall include:
• Discuss duration and
cost for continuation
• Evaluate success of CAP
• Evaluate alternate
technologies
• Discuss health an
safety impacts if
constituent levels
remain
Demonstrate
• Continuation of CAP will
Implement GW
not result in significant
monitoring planJat
reduction of constituents
Has the site
Termination
location of no le
• Constituents have not and
been identified
authorized
after health
than one year'
Will not migrate onto
for resource
and safet
predicted time
adjacent properties
development
travel upgradienanalysisGW
discharge to surface
any existing owater
will not violate 02B
foreseeable rece
standards
Public notice of the request
per Rule 0.0114 (b)
Proposed termination is
consistent with all other
environmental laws
Is there
sufficient
evidence
.
•
that concentrations are
less than 02L standards
from multiple
sampling
events?
No
further
action

Corrective Action Plan Update December 2019
Cliffside Steam Station
Source Area 2
(Former Units 1-4 Ash Basin)
SynTerra

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 6-39
Fly Ash and Bottom Ash Interbedded
Depiction
Included in Section 6 text

_
-
750
G
(NORTHWEST)
GROUNDWATER FLOW IS CROSS SECTION PERPENDICULAR TO
(SOUTHEAST)
G'
750
I
FORMER UNITS 1-4 ASH BASIN
i
_I
7
I
I
N N
I
I
I
I
Q Q
I
I
I
I
FORMER ASH BASIN
I
700
I /�
/
m m
-
N I N N N
m m m ►
m--_--
I
700
w
,
,
w--�
riiiiw__
�rj�
------w
SAPROLITE
1
00
00
FILL
FILL
00
-
-
-
-
Q
-
-
-
FILL
\ /
/
Q
—
Z
661.23'
Z
650
ALLUVIUM
\TRANSITION
650
Z
Q
_
SAPROLITE
\
ZONE
` /
O
- --
—
/W
661.62'
W
I
SAPROLITE
\
J
W
TRANSITION
ZONE
— \
`
\ —
— \
`
/
EDROCK\
I
/
��
I \
600
\ / -
��
��/��
��
600
E611R CK
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
550
550
1 71 LEGEND
19RO o F� GWA 10S WELL IN SHALLOW FLOW LAYER
C GWA 10D WELL IN DEEP FLOW LAYER
ABANDONED WELL/
FORMER G,
IB 1D GEOTECHNICAL BORING
-
- -.
U.'ITS 1-4
ASH ASIN
v GENERALIZED WATER TABLE
ASH
CLIFFSIDE
STEAM
Y STORAGE
AREA
GENERALIZED GROUNDWATER
STATION
e
FLOW DIRECTION
UNIT 5
-aa INACTIVE
sN ASH BASIN
ACTIVE
ASH BASIN
. ASH
ASH PORE WATER
°okFA
�
�
® FILL
o
�4,q ��
/
O SAPROLITE
TRANSITION ZONE
r r'. NDFMo
LAILL o 0 BEDROCK
I�.``-•• RgppR ■ ql �. iT.
� Oq0
NOTE: ALLUVIUM
CROSS SECTION G-G' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
V SHALLOW GROUNDWATER ELEVATION
V DEEP GROUNDWATER ELEVATION
NOTES
661.62' WATER LEVEL ELEVATION (NAVD 88) 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
(LABEL COLORING BY FLOW ZONE) 2. NM -NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
WELL SCREEN
COMPLIANCE BOUNDARY

1 eRogo
800 H H 800
(SOUTHWEST)
(NORTHEAST) �
FORMER
.ASH BASIN
CLIFFSIDE\ STORAGE M M STEAM AREA
Q Q STATION ACTIVE
3¢ INACTIVE f'�--
'ate UNIT or ASH BASIN
=ry ASH BASIN
FORMER UNITS 1-4 -
750 ASH BASIN 750 I'
FA I
/ / +r
r
LANDFILL MCCRAI,I,RO `_ /
706.5T SAPROLITE ci C7 C9 J FORMER ASH BASIN
� � J
NOTE ..�
700 07 02 \ \ m m m — — /� 700 LOCATIONS NOT ALONG THE CROSS CROSS SECTION H-H' IS LINEAR IN NATURE AND ALL
PROJECTED ONTO HE CROSS SECTION.
CTION ARE
17
CROSS SECTION LOCATION
00
00 _ \ �� \ / \ SAPROLITE FILL
- — BROAD RIVER LEGEND
Q _ ���� / N TRANSITION ZONE 661.2' ' 657'
Z WELL IN SHALLOW LAYER
� \ � '• GWA-14S
SAPROLITE "Bob.r 650 WELL IN DEEP LAYER
Z \ — / \ / / \ Z GWA 14D
661.0r4l \ I / 1 \ \ / GWA 14BR WELL IN BEDROCK LAYER
~ •�•••% \ i / ~ ABANDONED WELL/
/ \ �t.•r \ / 1 \ / i \ / / — — ` / / \ � IB 2AL GEOTECHNICAL BORING
/ 1
W — / \—/ — ��� \ — / �� / / \ ' ���� \ / / /\ I•�• "•� ��� J • GENERALIZED WATER TABLE
/ \DR6C / /\ / / \ /\ \ / I — /\ / / % \ / \ ��/ \ / W _ GENERALIZED BEDROCK FRACTURE
iw
Njosz / 1 / �i ORIENTATION
\ / \ \ / ��� •\ • / 1 / \ I /-1 GENERALIZED GROUNDWATER
600
r \ /- < / \ — / \ 600 FLOW DIRECTION
SAPROLITE
BEDROCK \ —
\ I / ® TRANSITION ZONE
BEDROCK
B
EDROCK /
FILL
550 ,( / \ �•/ \ / \ I / 1 \ \ I / \ / \ I / 1 \ \ I / \ / \ I / SHALLOW GROUNDWATER ELEVATION
_ _ _ _ _ _ 550
\ / ,�� — / / — ��� ` / / \ / — / / — 1•. •/ / DEEP GROUNDWATER ELEVATION
/ I / \ \\ / / \ /\ / I / \ •: /'; / I / /\ / I /,, \ \ //\ / / \ �� BEDROCK GROUNDWATER ELEVATION
WATER LEVEL ELEVATION (NAVD 88)
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED _ / / \ / — / \ \ / / \ ` /\. (LABEL COLORING BY FLOW ZONE)
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND / / / \ / I , \/ / \ I / \ / / / , / / \ WELL SCREEN
VERTICAL EXAGGERATION. THEACTUAL NUMBER OF FRACTURES IS FARTOO NUMEROUSTO
500 ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH \ / \ / — \ \ / \ \ / \ / — \ 500
ARE CONCEPTUAL ONL`. z 1 \ / \ \ / — — — COMPLIANCE BOUNDARY
W NOT AVAILABLE OR NOT MEASURED
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
2. NM - NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
4. DATA POSTED FROM I13-2 WELLS IS HISTORIC DATA COLLECTED BEFORE WELLS WERE ABANDONED DURING
BASIN CLOSURE.

-� Sample l D(Depth)
GWA-10D (13.5-15)
•* PH
♦ ARSENIC
a'
6
/,4*
Mom
_ 1a _ f ♦�
�} ID Sample -y ♦ P (Depth)
i7 ,•- +• GWA-29D
ul
LEGEND
Sample ID(Depth) LOCATION WITH NO EXCEEDANCES
• `.� F-•+. - - GWA-12BRU (20-23.5)
fie•
_ *F - ® LOCATION WITH ONE OR MORE EXCEEDANCES . ♦. �..
ASH BASIN WASTE BOUNDARY
♦ ! `r j`� %y -:,.. . ■ . ASH BASIN COMPLIANCE BOUNDARY
♦ = p !fir r' * %y414-1 ASH STORAGE AREA BOUNDARY
x' .
STREAM (AMEC NRTR)
�' •-i-�- - Y : y f •'� NOTES:
♦ r - _ - •. 1. DISCRETE SOIL SAMPLES EXCEED COMPARATIVE CRITERIA FOR CONSTITUENTS LISTED
UNDER THE SAMPLE ID.
{ _ S Sample ID(Depth) + ♦ t
ti r f . 2. SAMPLE DEPTH IS FEET BELOW GROUND SURFACE.
�• � \ GWA 138R (13-14.5) - �•�., �, �
` f - • - r ♦ 3. BACKGROUND SOIL SAMPLES NOT DEPICTED ON THIS MAP. BACKGROUND SOIL SAMPLE
• ' k .--. - - LOCATIONS: BGBS-MW-30, BGBS-MW-32, MW-30D, MW-32D AND MW-32S ARE LOCATED
��, r�'• r,'.,�, '• yam' SOUTH OF THE UNIT 5 INACTIVE ASH BASIN.
:'• i>M K • ♦ �Y ' 4. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
5.•: .. �' ♦ US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
'� ; `►. IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
/'. 1 R - - - ;?'�� _ aA '� ♦ WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
- `';� • j - r(J ��,,77� WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
t A �' ' 9`� * ` ' l 1 1 ♦� 5. NRTR - NATURAL RESOURCES TECHNICAL REPORT
.;•' • � � 4 -r Y - - ;llT ., � ; � 6. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
% API .Y �'•'• 7. ALL BOUNDARIES ARE APPROXIMATE.
�_ •, - _ . i -� 8. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON DECEMBER 17,
+ _ - 2019. IMAGE COLLECTED ON FEBRUARY 25, 2019.
7 .• � ' '�• 9. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
♦♦ r' ` GRAPHIC SCALE FIGURE 6-42
RNr-. ,i• ,::r.,_; *' DUKE 100 0 100 200
ll ENERGY,
UNSATURATED SOIL SAMPLE
:•.- ...` ♦ , 1 :��rr-� (IN FEET)
♦ ,; '; AS LOCATIONS AND EXCEEDANCES
...�� + 'r DRAWN BY:C.DAVIS DATE:06/12/2019 FORMER UNITS 1-4 ASH BASIN
L ♦�►'� +h •.�, - r' '�y y/y,.. $!Y r - f REVISED BY: C. DAVIS DATE:12/12/2019 CORRECTIVE ACTION PLAN UPDATE
�• ' F'I( -►_ 1' �•� ~ xY+ •{.� CHECKED BY: T. GRANT DATE:12/12/2019
.-j�' - _ •'- i:• '�'•- �� 'r'�.L �,. APPROVED BY: T. GRANT DATE:12/12/2019 CLIFFSIDE STEAM STATION
r - ,h•. • Terra PROJECT MANAGER:S.SPINNER
�, s...♦r.. `�m MOORESBORO, NORTH CAROLINA
"7 www.synterracorp.com

750
_
G--No
(NORTHWEST) GROUNDWATERCROSS SECTION FLOW IS PERPENDICULAR TO
FORMER UNITS 1-4 ASH BASIN
FORMER ASH BASIN
i
700
co
co
FILL FILL
Q
Z
E GWA-ms
B 92 16D2AL
Z 650
sLoa 13D ALLUVIUM
OTDS
259 504
g3
r
TD
333
GWA-lOD
W
B <50
G flz
J
soa 23.5 SAPROLITE Ls-ozl
B
W
TDS 125
/ Li
99.0
504
52
TRANSITION TD
a66
_
\ — ZONE
600
TD 1w \ 1/1 \
6EDROCK \
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
550
-
LEGEND
BROA�RLfa
41
GWA 10S WELL IN SHALLOW FLOW LAYER
" >r' ' "
GWA 10D WELL IN DEEP FLOW LAYER
✓,C #r;,
ABANDONED WELL/
IB 1D
1113 MIR
GEOTECHNICAL BORING
' o ASH aslN
` -•5 . , ` ASH
y
Y STORAGE"-�
GENERALIZED WATER TABLE
CLIFFSIDE
STEAM AREA
GENERALIZED GROUNDWATER
' 1,r sTATION
j w
FLOW DIRECTION
a INACTIVE
ASH BASIN ACTIVE
ASH
.;i
- caw A ,3„7 .,. ASH BASIN
ASH PORE WATER
o I
FILL
f hFRgo.:��
O SAPROLITE
TRANSITION ZONE
w, O . ,
•-LANDFILL 4` �RgH'R qp
;��T_4�= BEDROCK
r-.
e NOTE:
CROSS SECTION G-G' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
ALLUVIUM
111111- G'
(SOUTHEAST)
I
I m N
I N N
I r r
I
I
I
I
I
I
I
I
I
i
SAPROLITE
--
soa
TD
101
\ ,
B OiD
B
aa.D
� TRANSITION \
\
/
SAPROLITE
soa
33.]
�
ZONE
\ /
TD 1T3
BI13-048R
TO
TDS
198
EDROCK\
SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
MEAN BORON (B) CONCENTRATION (ug/L)
6 MEAN LITHIUM (Li) CONCENTRATION (pg/L)
6� MEAN SULFATE (SO4) CONCENTRATION (mg/L)
MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
WELL SCREEN
COMPLIANCE BOUNDARY
750
700
600
N OTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASEf USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
550 LITER (ug/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS
ARE IN MILLIGRAMS PER LITER (mg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS,
THE MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
REPORTING UNITS Ng/L Ng/L mg/L mg/L
15A NCAC 02L STANDARD 700 NE 250 500
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)' 50 3 4 57
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)' 50 12 15 107
BACKGROUND THRESHOLD VALUES 50 11 17 120
(BEDROCK FLOW ZONE)'
' - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
NE - NOT ESTABLISHED

750 G _ - G' 750
(NORTHWEST) GROUNDWATER FLOW IS CROSS SECTION PERPENDICULAR TO (SOUTHEAST)
FORMER UNITS 1-4 ASH BASIN —
il it N N
l0
FORMER ASH BASIN
O� J DIY O�
� /���
700 / - m m m 700
--------------- GWA71M
co
co
Q ,
Z
GWA-MS
S 0.6
5ZZ 650 3
W
J
W
600
550
FORMERIT
- CLIFFSIDE\
� - STEAM
ASH
STORAGE
AREA
6
\; STATION
-
n3a \ •; ;„ INACTIVE 1
ASHBASIN '•�
ACTIVE
\
ASH BASIN
F
Ao ry �
t
•-LANDFILL Rq0
s
SAPROLITE AS 0.
Sr 38 co
FILL FILL v <0.3 co
GWA-12BRU Q
FILL AS al >
Sr 49 Q
I&0.42 IB-04o \ TRANSITION Z
ALLUVIUM As a4z / 650 Z
sr s10 — AS 0s4 ZONE / \
v 1 0.48 SAPROLITE Sr V 0
1 —
`JQ
Sr 139 AS 0.13 \ Lu
v 0A SAPROLITE Ie-ozI \ Sr 130 — _ \ J
/ AS 0.54
V \ \ / IJ,I
v 10
_ TRANSITION /
— ZONE — \ ` _ \ \ EDROCK\
AS 1101 0.81 / — \ IB-028RU — \ / — \ \ 600
\ Sr 128 --LL 11
/ v za 6EDROCK v
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA NOTES:
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION. 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO TUNE 2019.
550 2. ARSENIC (As), STRONTIUM (Sr), AND VANADIUM (V) CONCENTRATIONS ARE
IN MICROGRAMS PER LITER (u9/L).
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS,
LEGEND THE MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
GWA 10S NO DATA AVAILABLE
WELL IN SHALLOW FLOW LAYER ALLUVIUM
ANALYTICAL PARAMETER As Sr V
' GWA-1OD WELL IN DEEP FLOW LAYER REPORTING UNITS ug/L u9/L u9/L
ABANDONED WELL/ SHALLOW GROUNDWATER ELEVATION
IB-1D GEOTECHNICAL BORING 15A NCAC 02L STANDARD 10 NE 3*
1 . DEEP GROUNDWATER ELEVATION BACKGROUND THRESHOLD VALUES
GENERALIZED WATER TABLE (SHALLOW FLOW ZONE)` 0.2 34 1
GENERALIZED GROUNDWATER BACKGROUND THRESHOLD VALUES
�► FLOW DIRECTION MEAN ARSENIC (As) CONCENTRATION (ug/L) (TRANSITION FLOW ZONE)i 2 69 11
MEAN STRONTIUM (Sr) CONCENTRATION (lag/L) BACKGROUND THRESHOLD VALUES
ASH MEAN VANADIUM (V) CONCENTRATION (ug/L) (BEDROCK FLOW ZONE)r 1 93 1
O ASH PORE WATER * - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
WELL SCREEN 1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
` ® FILL DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
O SAPROLITE 2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
COMPLIANCE BOUNDARY
® 160
HOCALE: 1" 1
TRANSITION ZONE 0 40 80
'DUKE 0' FIGURE 6-43b
_ \ ORIZNTAL S= 6
BEDROCK FNFRC�Y VERTICAL SCALE.1' _32_ GENERAL CROSS SECTION G:G'
`1 NOTE:
�_ CROSS SECTION G-G' IS LINEAR IN NATURE AND ALL
NOT ALONG THE CROSS SECTION ARE
.± PROJECTED INTO THE CROSS SECTION.
CROSS SECTION LOCATION

750 G _ 00 G'
(NORTHWEST) GROUNDWATER FLOW IS CROSS SECTION PERPENDICULAR TO (SOUTHEAST)
FORMER UNITS 1-4 ASH BASIN m N
I I
I I
I
I I (7
I
I I
FORMER ASH BASIN
I J I
I
I
700 ___--
SAPROLITEAFOD REP -
FILL
Q - _ _GWA-]2BRUCa 23
FILL Fe sot
Z GWl4ll15 Ra \
Co 5.9 I
Z 650 Fe 1az 19z _ Iemo TRANSITION \
Mn 1038 ALLUVIUM Fe zw Co o.zo ZONE
ORa 1.3a� Mn Rzo SAPROLITE Fe 29oo
_ Mn 160
Ra
-
GWh108
/ Co 3.1
W Fe <50
J I Mn 114 SAPROLITE IB-@I \ / W Ra <OS Ss.8
/ Fe 200
Mn 1500
_ TRANSITION - ZONE DR
\
— \ \ \ — _ \ / \ EOCK
600 I - Col&01D �/ I \ / /
/ Fe <50
Mn GQ _ I -L 1 \ Fe 190
6EDROCK \ \ / j m.
99.0
550
OR% RIVEp
\ FORMER V
U. 'ITS 1-4
- ASH BASIN ,
CLIFFSIDE
STEAM
STATION
>� UNIT5 cr,
zQ INACTIVE
ASH BASIN
c� cv
0
CCP
c
LANDFILL I�. + •A6'Rpgp
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
'LEGEND
GWA 10S WELL IN SHALLOW FLOW LAYER
GWA 10D WELL IN DEEP FLOW LAYER
ABANDONED WELL/
IB 1D GEOTECHNICAL BORING
ASH • GENERALIZED WATER TABLE
STORAGEAREA -� GENERALIZED GROUNDWATER
FLOW DIRECTION
0
ACTIVE ASH
ASH BASIN
ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
NOTE:
•�-_tea' CROSS SECTION G-G' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
ALLUVIUM
V SHALLOW GROUNDWATER ELEVATION
V DEEP GROUNDWATER ELEVATION
a
MEAN COBALT (Co) CONCENTRATION (ug/L)
Fe MEAN IRON (Fe) CONCENTRATION (Ng/L)
MEAN MANGANESE (Mn) CONCENTRATION (pg/L)
MEAN TOTAL RADIUM (Re) CONCENTRATION (ug/L)
WELL SCREEN
COMPLIANCE BOUNDARY I �/
750
700
CD
CD
Z
650 Z
0
W
J
W
600
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2. COBALT (Co), IRON (Fe), MANGANESE (Mn), AND TOTAL RADIUM (Re)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER (u9/L)
550 * WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS,
THE MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Co Fe Mn Re
REPORTING UNITS pg/L u9/L u9/L u9/L
15A NCAC 02LSTANDARD
1*
300
50
NE
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)1
21
1700
760
2
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)'
5
1840
760
2
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)`
2
7680
232
3
. - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
2010 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.

800 —�:] H --a*-
(SOUTHWEST)
750
vaa
SAPROLITE
700
600
550
500
FORMER UNITS 1-4
ASH BASIN
J
FORMER ASH BASIN
N
m
m
i
ao
€II
■■■■■■\�_
■■■■■■■■. .::::::■...
II
.■■■■■■■■■■■.:■■■■■■■■■■
�o
--
-�11■■■■■■ ■niiii.■■■■■■■■■■r
NOWEREBROAD
_�■_ ■:aim.■■■■■■■■■
■■■i■II■m■■■■■::.
■■■
RIVER
U0.7TRANSITION
1 ZONE
mm
H'
(NORTHEAST)
/Y \ TDS 413 / - GWA-SS3
98
TDS 333
IB-021 GWA-11BR6 soa 105 /
/
B 350 TDs 299
Li 16.2
— \
Li
99.0 /SO4 103
1 / / \ — \ ` u•` \ — \ 1 / / \ s04 52 — TDS 319
\ / / b9DR6/CK I / \ / / \ / I \ / \ / I TDS 456 I / \ / / — \ \ I •;,•\ / / ,\
< /B-02—
/ s`oa
TDs 1n
BEDROCK
/ 1 .i \ \ 1 \ / \ I / 1 ��/� \ \ / \••��/ 1 \ / Y� / 1 / 'Z! ...�•/ \ I / 1 \ \ / / I /
\ — 1 / / \ — \ 1 / / \ '�•• \ 1 / / \O, — \ 1 / / \ \ 1 / / \ — BEDROCK
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE 1 / / \ — \ 1 / / GWA-11BRL r
ORIENTATIONS ACCOUNT FORAPPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND B <50
VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUSTO \ I \
ILLUSTRATE ATTHIS SCALE. IN ADDITION, THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH \ / \ / — — \ / SO4
ARE CONCEPTUAL ONLY.
LEGEND
GWA-14S WELL IN SHALLOW LAYER ®
TRANSITION ZONE
0
WELL SCREEN
GWA-14D WELL IN DEEP LAYER r—�
BEDROCK
FGWA-14BRI WELL IN BEDROCK LAYER ®
FILL
— — —
COMPLIANCE BOUNDARY
IB 2AL ABANDONED WELL/
GEOTECHNICAL BORING
SHALLOW GROUNDWATER ELEVATION
(B) CONCENTRATION (ug/L)
.
B
Alros
2m
MEAN LITHIUM (Li) CONCENTRATION (pg/L)
GENERALIZED WATER TABLE V
DEEP GROUNDWATER ELEVATION
sLO4
c2
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
GENERALIZED BEDROCK FRACTURE
szz
MEAN TOTAL DISSOLVED SOLIDS (TDS)
ORIENTATION V
BEDROCK GROUNDWATER ELEVATION
CONCENTRATION (mg/L)
—, GENERALIZED GROUNDWATER
FLOW DIRECTION
800
750
700
600
"
•�. `.�'�,�\.'
FORMER \.
\ UNITS I-4
ASH BASINASH
/
I
'CLIFFSIDA
�STORAGE1
- - I-
>�
STEAM \
STATION Ir
AREA
ACTIVE
_Q J.
UNITS
ASH B'NAC
ATS N '.
/ ���
ASH B
J J..
i
"y
CCP
LANDFILL
MCCRAI,I,R
CROSS SECTION LOCATION
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO JUNE 2019.
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (fag/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS
ARE IN MILLIGRAMS PER LITER (mg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS,
THE MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER
B
Li
SO4
TDS
REPORTING UNITS
Hg/L
fag/L
mg/L
mg/L
15A NCAC 02L STANDARD
700
NE
250
500
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)'
50
3
4
57
550 BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)'
50
12
15
107
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)'
50
11
17
120
- UPDATED BACKGROUND THRESHOLD
VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES
COLLECTED FEBRUARY
2010 TO DEC EMBER 2018 AS SUBMITTED IN JUNE
2019.
NE - NOT ESTABLISHED
500
SAPROLITE

800 --�] H �
(SOUTHWEST)
FORMER UNITS 1-4
750 ASH BASIN
3190�
SAPROLITE U' (DJ � FORMER ASH BASIN
H 1 800
(NORTHEAST)
750
S FORMER,•
\ UNITS 1-4
` ASH BASIN
1 �CLIFFSIDE\ '.STORAGE
STEAM AREA.
UNITS STATION I13
r IE
WTAC
INACTIVE / ram" iJ:..
ASH BASIN \
r \ r
i
N N N N
700 \ \ \ _ _ , 700 illIffM
OTE:
ROSS SECTION H-H' IS LINEAR IN NATURE AND ALL
\ OCATIONS NOT ALONG THE CROSS SECTION AREROJECTED ONTO THE CROSS SECTION.
_ \ / GWA-=45 a a a a CROSS SECTION LOCATION
As Gz • 3333
00 0
c� / / \ Vr vs 1 00
��I / \ SAPROLITE
> , 'J / BROAD RIVER > NOTES.
Q `7 TRANSITION ZONE -657'
? 650 r \, zr�['
SAPROLITE 650 Z
'��. CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
/ GWA-I \ / / \ OTO JUNE 2019.
L_+�/ GWA-UBRU AS 12 1 \
'1� \ I \ / AS 0.3 I Sr 5�4 _ / \ \ /\ Q 2. ARSENIC (As), STRONTIUM (Sr), AND VANADIUM (V) CONCENTRATIONS ARE
1B-Bz1 -V 6 \ LZ 0.54 �� /�� W IN MICROGRAMS PER LITER (pg/L).
j \ / \ � \ / � \ / \/ Sr Lo / ,�`` ` / \ �\ \,x �'!' 11 \ ��� �W * WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS,
\ / / b9DR6CK I \ / \ / I / \) / \ \ / I / \ / I ���,\ / I
� THE MOST RECENT VALID SAMPLE DATA UP TO DUNE 2019 WAS USED.
ASWAl1BL3 NO DATA AVAILABLE
600 /1 / / \ /'1,�/• / - /� /-1 /. v a _\ — \ 600 ANALYTICAL PARAMETER As Sr V
7 7 / \
\ �y \ -t �V* \ REPORTING UNITS pg/L
pg/L pg/L
ROCK �► \ .l / - \ I
\�` ,�/ \ / 1 \ / \ / 15A NCAC 02L STANDARD 10 NE 3*
/BEDROCK ` /\ BACKGROUND THRESHOLD VALUES
X\ \ / I / \ l / l i\ / I / \ l / �\ \ / I ` \ / l i\ / I / \ l / �\ (SHALLOW FLOW ZONE)' 0 34 1
BACKGROUND THRESHOLD VALUES
550 / 1 .,1� \ / / 1 / / / 1 / \ / / 1 / / / 1 / \ / / 1 / / / 550 (TRANSITION FLOW ZONE)' 2 69 11
\ / �� \ / \ ��� 1 /\ / \ / \ ���.1•'''/\ / \ / \ / ` /\ BACKGROUND THRESHOLD VALUES
\ BEDROCK FLOW ZONE' 1 93 1
/ — \ \ _�� / — — \ / — \ ���� / — \ / — \ \ i\ / I — \ \ ��•\ * - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
ORIENTATIONSOF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONSACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION, AND / / / / / \ \ / / \ / I / \ It/ \ 2010 TO DEC EMBER 2018 AS SUBMITTED IN JUKE 2019.
VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO \ I \
500 ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH — \ —
ARE CONCEPTUAL ONLY
LEGEND
GWA-14S WELL IN SHALLOW LAYER
GWA-14D WELL IN DEEP LAYER
FGWA-14BRI WELL IN BEDROCK LAYER
IB 2AL ABANDONED WELL/
GEOTECHNICAL BORING
GENERALIZED WATER TABLE
® TRANSITION ZONE
—� BEDROCK
® FILL — —
f SHALLOW GROUNDWATER ELEVATION MEAN ARSENIC (As) CONCENTRATION (pg/L)
way° MEAN STRONTIUM (Sr) CONCENTRATION (pg/L)
DEEP GROUNDWATER ELEVATION MEAN VANADIUM (V) CONCENTRATION (pg/L)
GENERALIZED BEDROCK FRACTURE
ORIENTATION v
—, GENERALIZED GROUNDWATER
FLOW DIRECTION
SAPROLITE
BEDROCK GROUNDWATER ELEVATION
WELL SCREEN
COMPLIANCE BOUNDARY

800 H ---a mm-- H
(SOUTHWEST) (NORTHEAST)
M M
FORMER UNITS 1-4
750 ASH BASIN
119
SAPROLITE 0 ]-_j FORMER ASH BASIN
700
/ \ CGWA-1 0.4
MA
- _ \ 4 \ Ra SAPROLITE FILL
BROAD RIVER
Q \ �•� �I/ / Co 0.2 TRANSITION ZONE ^ 657'
?
T�� F
650e 79 I&ORAL — SAPROLITE y
� / \• � Ca 192
GWA-11S
0 \ a!� / \ / —♦ \ /\ I Mn 820 GWA-118 Co 16 1 /
"\ ���/ T \ Co 0.7. Fe 521
I �{ ' I \ IB-021 Fe 421 I Mn 1970._ \ /
Co 15.8 Mn 7 R. 0.
26RU
_ 1 / R. \ /
Lu
_ \ — ♦ � _ \ � GWA-11BR / _ �/
600 t \ \ I / 1 \ \ \ / \ I / 1��, \ �\ I Co 0.8
Mn 90
Ra , iBED/ \ ROCK
F. 200
Ra
\���/ 1 \ \ / `c11 / 1 / \ yam,•/ \ / 1 \ / /
BEDROCK
550
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITH IN THE PLANE OF THE CROSS SECTION, AND / / \ / I \/ / Co
500 VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURESISFARTOO NUMERCUSTO \ / \ / — — \ / FeILLUSTRATE AT
ARE CONCEPTUAL
ONLY.
IN AD DITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH_
LEGEND
GWA 14S WELL IN SHALLOW LAYER
GWA 14D WELL IN DEEP LAYER
GWA-14BR WELL IN BEDROCK LAYER
IB-2AL ABANDONED WELL/
GEOTECHNICAL BORING
v — GENERALIZED WATER TABLE
® TRANSITION ZONE
BEDROCK
® FILL — —
WELL SCREEN
COMPLIANCE BOUNDARY
SHALLOW GROUNDWATER ELEVATION MEAN ARSENIC (As) CONCENTRATION (pg,/L)
Fe MEAN STRONTIUM (Sr) CONCENTRATION (ug/L)
V DEEP GROUNDWATER ELEVATION as MEAN VANADIUM (V) CONCENTRATION (ug/L)
GENERALIZED BEDROCK FRACTURE
ORIENTATION v
—� GENERALIZED GROUNDWATER
FLOW DIRECTION
BEDROCK GROUNDWATER ELEVATION
800
750
700
00
Q
650 z
Z
O
Q
W
J
W
600
- QORi�Fq _
�x,
.- F ITS 1-4 UN
ASH BASIN r 1-
ASH
1
1 �CLIFFSIDE` 1,STORAGESTEAM �'. �.
/ 1 STATION\� (1,17 AREA ACTIVE
'ate UNIT5 US ASH BASIN
INACTIVE I r� _
=N ASH BASIN
LAND ILL
NOTE
CROSS SECTION H-H' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
Y PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018
TO DUNE 2019.
2. COBALT (Co), IRON (Fe), MANGANESE (Mn), AND TOTAL RADIUM (Re)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER (fag/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS,
THE MOST RECENT VALID SAMPLE DATA UP TO DUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Co Fe Mn Re
REPORTING UNITS Ng/L fag/L fag/L fag/L
15A NCAC 02L STANDARD 1* 300 50 5^
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)1 21 1700 760 2
550 BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)' S 1840 760 2
BACKGROUND THRESHOLD VALUES
(BEDROCK FLOW ZONE)' 2 7680 232 3
* - IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
^ - FEDERAL MAXIMUM CONTAMINANT LEVEL.
1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY
500 2010 TO DECEMBER 2018 AS SUBMITTED IN DUNE 2019.
O SAPROLITE

Note:
*sampling events prior
to 1/1/2018
I Affected I
Potential \ 0
Mixing V 00
°�o
Q C>
Groundwater Wells
'A
k
CCR-IB-3BR
�
moo
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� CCR-IB-35
Ash Pore Water Wells
`moo
*�
off°
GWA-11BR
IB-015* o
N
IB-02S-SL* Generally
♦ GWA-11BRU
IB-045-SL* Unaffected
G WA-11S
Oo
Background Wells 80% V 80% R
■ GWA-30BR 60% V 60%
• GWA-30S _ ` �
A MW-30D /40% El 40%\
MW-30DA
� O ° ��o
z
V MW-305 ■* - q, a �
o o
Z MW-32BR 20 /o z - 20 /o
* MW-32D ■
❑ MW-325 moo moo moo oo no° 0 0 0°
0 ITO O 1/ (o C
<— Ca — —CIS

. ❑
0000
1000,11,
A
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DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
LEGEND
FIGURE 6-46
ISOCONCENTRATION MAP
ARSENIC IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Ile, X- - ,. rl�
♦,
F-"� cu"mil\
DUKE
ENERGY
CAROLINAS
LEGEND
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(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
synTel"id PROJECT MANAGERS SPINNER
www.synterracorp.com
7-
NOTES:
FIGURE 6-47a
ISOCONCENTRATION MAP
BORON IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

0 *00 'o 0 -\t�
44.
DUKE
ENERGY
(IN FEET)
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
DATE: 06/13/2019
DATE: 12/18/2019
CHECKED BY: T. GRANT
DATE: 12/18/2019
APPROVED BY: T. GRANT
DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
WnTena
www.synterracorp.com
LEGEND
lip
lip
NOTES:
FIGURE 6-47b
ISOCONCENTRATION MAP
BORON IN DEEP FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

lip
lip
a
♦ _ a
♦ \� NOTESEl
•
DUKE
ENERGY
(IN FEET)
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
DATE: 06/13/2019
DATE: 12/18/2019
CHECKED BY: T. GRANT
DATE: 12/18/2019
APPROVED BY: T. GRANT
DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
WnTena
www.synterracorp.com
FIGURE 6-47c
ISOCONCENTRATION MAP
BORON IN BEDROCK FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

LEGEND
lip
.%
e'
i
NOTES:
i / 1 1 _\ - -
44.
♦
�*
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ENER
ENERGY
° "FEET)
FIGURE 6-48
ISOCONCENTRATION MAP
COBALT IN BEDROCK FLOW ZONE
CAROLIN• AS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: C.DAVIS DATE:06/13/2019
REVISED BY: C.DAVIS DATE:12/16/2019
'
4
CHECKED BY: T.GRANT DATE:12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROIECTMANAGER:S.SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
synTel'Id
www.synterracorp.com

/ ♦♦,
i / 1 1 _\ ` —
DUKE (IN FEET)
ENERGY
CAROLINAS
DRAWN BY: C. DAVIS DATE: 06/13/2019
'41p REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
synTel"id PROJECT MANAGERS SPINNER
www.synterracorp.com
LEGEND
lip
NOTES:
FIGURE 6-49a
ISOCONCENTRATION MAP
IRON IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

♦'■
LEGEND
lip
% % \ �'
t E:l-
1 �
�� ♦ /` � NOTES:
44.
•
•
(� DUKE
♦ (IN FEET)
ENERGY
CAROLINAS
• DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
synTena PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-49b
ISOCONCENTRATION MAP
IRON IN DEEP FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

GYPSUM �•
STACK -OUT AREA
/ �♦
ICI
LEGEND
lip
e'
i
NOTES:
� T1
�* 0
•
dos DUKE
Y
ENERGY.
(IN FEET)
FIGURE 6-49c
ISOCONCENTRATION MAP
IRON IN BEDROCK FLOW ZONE
�
•
//
CAROLINAS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: C.DAVIS DATE:06/13/2019
REVISED BY: C.DAVIS DATE:12/16/2019
'
4
CHECKED BY: T.GRANT DATE:12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
WnTerm
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='ANQ'id
GYPSUM
STACK -OUT AREA
LEGEND
lip
at aw
NOTES:
n
J
I
•
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04 ■.10
DUKE
ENERGY
(IN FEET)
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
DATE: 06/13/2019
DATE: 12/16/2019
CHECKED BY: T. GRANT
DATE: 12/16/2019
APPROVED BY: T. GRANT
DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
WnTena
www.synterracorp.com
FIGURE 6-50a
ISOCONCENTRATION MAP
LITHIUM IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

LEGEND
lip
/ �� ♦ NOTES:
i
14'
synTena
04 ■.10
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-50b
ISOCONCENTRATION MAP
LITHIUM IN DEEP FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

.'
4Q
GYPSUM ,16*
STACK�_�=�_�
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LEGEND
lip
NOTES:
•
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ENERGY
(IN FEET)
FIGURE 6-50c
IN CE ROCK FL MAP
LITHIUM IN BEDROCK FLOW ZONE
LITHIUM
�
•
CAROLINAS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: C.DAVIS DATE:06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
'
//
CHECKED BY: T.GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
. synTena
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41,
DUKE
ENERGY
CAROLINAS
14'
synTena
LEGEND
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(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
FIGURE 6-51a
ISOCONCENTRATION MAP
MANGANESE IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

NOwlOwl '7
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DUKE
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APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
LEGEND
lip
NO®
FIGURE 6-51b
ISOCONCENTRATION MAP
MANGANESE IN DEEP ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

►��� ,4Q
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FIGURE 6-51c
ISOCONCENTRATION MAP
MANGANESE IN BEDROCK ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: C.DAVIS DATE:06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
'
CHECKED BY: T.GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
WnTerm
www.synterracorp.com

LEGEND
lip
`•% - -
♦ NOTES:
•
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'•JI
(� DUKE
ENERGY
CAROLINAS
14'
synTena
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.'♦I
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
FIGURE 6-52a
ISOCONCENTRATION MAP
STRONTIUM IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

LEGEND
lip
NO®
DUKE
ENERGY
(IN FEET)
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: C. DAVIS
DATE: 06/13/2019
DATE: 12/16/2019
CHECKED BY: T. GRANT
DATE: 12/16/2019
APPROVED BY: T. GRANT
DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
WnTena
www.synterracorp.com
FIGURE 6-52b
ISOCONCENTRATION MAP
STRONTIUM IN DEEP ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

GYPSUM
STACK -OUT AREA
LEGEND
lip
NOTES:
lie
I
44.
•
` f
(� DUKE
� (IN FEET)
ENERGY
� CAROLINAS
• DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
' CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
synTena PROJECT MANAGER: S. SPINNER
www.synterracorp.com
FIGURE 6-52c
ISOCONCENTRATION MAP
STRONTIUM IN BEDROCK ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

'i.
i> DUKE
ENERGY
Co-: -INAS
4'
nTerra
..0
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
LEGEND
lie
NO®
FIGURE 6-53a
ISOCONCENTRATION MAP
SULFATE IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

i> DUKE
ENERGY
C; LINAS
14'
nTerra
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
LEGEND
lie
Ie
Ie
NO®
FIGURE 6-53b
ISOCONCENTRATION MAP
SULFATE IN BEDROCK ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

A
�> DUKE
ENERGY
C INAS
116rip
synTerra
LEGEND
lip
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
PROJECT MANAGER: S. SPINNER
NO®
FIGURE 6-54
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN BEDROCK ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

l
(� DUKE
ENERGY
CAROLINAS
14'
synTena
I
I
k
ASH
STORAGE AREA
No,
ON
I
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
CHECKED BY: T. GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
FIGURE 6-55a
ISOCONCENTRATION MAP
TOTAL RADIUM IN DEEP ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

' Y ) /
LEGEND
lip
NOTES:
� T1
/ ♦♦
♦
�*
(> DUKE
ENER
ENER
ENERGY.
° "FEET)
FIGURE 6-55b
ISOCONCENTRATION MAP
TOTAL RADIUM IN BEDROCK ZONE
CAROLI• AS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: C.DAVIS DATE:06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
'
synTel'Id
CHECKED BY: T.GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
www.synterracorp.com

.'♦
►OEM
GYPSUM �♦�.
STACK -OUT AREA ,
, / 1 1 _\ ` —
DUKE
ENERGY
(IN FEET)
CAROLINAS
DRAWN BY: C. DAVIS
DATE: 06/13/2019
REVISED BY: C. DAVIS
DATE: 12/16/2019
CHECKED BY: T. GRANT
DATE: 12/16/2019
APPROVED BY: T. GRANT
DATE: 12/16/2019
PROJECT MANAGER: S. SPINNER
WnTena
www.synterracorp.com
LEGEND
lip
NOTES:
FIGURE 6-56a
ISOCONCENTRATION MAP
VANADIUM IN SHALLOW FLOW ZONE
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

' Y ) /
LEGEND
lip
.%
e'
i
NOTES:
/ ♦♦
♦
�*
(> DUKE
ENERGY
(IN FEET)
FIGURE 6-56b
N MAP
I N BEDROCK
VANADIUM
VANADIUM IN BEDROCK ZONE
�
•
CAROLINAS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: C.DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/16/2019
'
CHECKED BY: T.GRANT DATE: 12/16/2019
APPROVED BY: T. GRANT DATE: 12/16/2019
PROJECT MANAGER:S.SPINNER
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA
WnTerra
www.synterracorp.com

Note:
* - Sampling
events prior to
1/1/2018
Surface Water Legend
■
SW-BR-3*
•
SW-SBRBG*
A,
SW-BRU14-1*
*
SW-BRU 14-2*
♦
SW-BRU 14-3*
/40%,
20%
�— Ca
Cl —!
DUKE
DRAWN BY: R. Badum DATE: 10/18/2019
�- ENERGY
REVISED BY: R. Badum
CHECKED BY: T. Grant
APPROVED BY: T. Grant
PROJECT MANAGER: S. Spinner
0,
www.synterracorp.com
synTerra
Seeps Legend
■ S-3*
• S-10*
20%
FIGURE 6-57
SEEP AND SURFACE WATER
QUALITY PIPER DIAGRAMS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 6-58a
Remedial Alternative 2 - System Layout
- Groundwater Remediation by
Phytoremediation and TreeWell
Technology
Provided in separate electronic figure file as a
large sheet size

Aeration Tubing
Pi-nompWr
Tree We11'II"
C-olumn
Amendment
Pips
T�wget
oundwater
DUKE
n ENERGY
CAROLINAS
161P
s)mTerra
%,Qrnero
Tube
Rood Sleeves' LinIEN
rit&ftmrad!o-ti )
FIGURE 6-58b
NOT TO SCALE REMEDIAL ALTERNATIVE 2
CONCEPTUAL TREE WELL
DRAWN BY: J. CHASTAIN DATE:12/21/2019 GROUNDWATER REMEDIATION BY PHYTOREMEDIATION
REVISED BY: DATE: -
CHECKEDBY:T.GRANT DATE:12/21/2019 AND TREE WELL TECHNOLOGY
APPROVED BY: T.GRANT DATE:12/21/2019 FORMER UNITS 1-4 ASH BASIN
PROJECT MANAGER: S. SPINNER CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
www.synterracorp.com MOORESBORO, NORTH CAROLINA

9
i
16110,
705, 4
110
soi
1 �
715
r
! � A
3
4 720
a•'
. I _
Al
d�40
725 owk
v,
11 P -{ -.♦
�9
(' DUKE
I ENERGY
CAROLINAS
LEGEND
• I
MODELED TREE WELL AREA
' do
---- HYDRAULIC HEAD (FEET)
ASH BASIN WASTE BOUNDARY
670"
ASH BASIN COMPLIANCE BOUNDARY
STREAM (AMEC NRTR)
690
WETLANDS (AMEC NRTR)
NOTES
'
1. THE MODEL SIMULATED 2.56 ACRES OF TREEWEL-Cm SYSTEM WITH A REMOVAL
RATE OF APPROXIMATELY 3.1 MILLION GALLONS OF GROUNDWATER PER YEAR.
2. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
-
WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER ENVIRONMENTAL
AND INFRASTRUCTURE, INC. JUNE 2015.
3. NRTR - NATURAL RESOURCES TECHNICAL REPORT
4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
5. ALL BOUNDARIES ARE APPROXIMATE.
6. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
• M
DECEMBER 17, 2019. IMAGE COLLECTED ON FEBRUARY 25. 2019.
_
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM RIPS 3200 (NAD83).
GRAPHIC SCALE
FIGURE 6-58c
100 0 100 200
REMEDIAL ALTERNATIVE 2 - MODELED HYDRAULIC HEAD
CONTOURS - GROUNDWATER REMDEDIATION BY
PHYTORE MEDIATION AND TREEWELL TECHNOLOGY
DRAWN BY: C.DAVIS DATE:05/03/2019
FORMER UNITS 1-4 ASH BASIN
REVISED BY: C. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: T. GRANT DATE: 12/18/2019
CLIFFSIDE STEAM STATION
PROJECT MANAGER: S. SPINNER
MOORESBORO, NORTH CAROLINA
www.s nterracor .com

Submit CAP to NCDEQ (1 day)
NCDEQ Review and Comment Period (90 days)
Duke Energy Responds to CAP Comments (60 days)
CAP Approved by NCDEQ (1 day)
Implement Effectiveness Monitoring Plan (30 days)
Submit Pilot Test Work Plan and Associated Permit Applications to NCDEQ (30 days)
Implement Quarterly Progress Reporting to NCDEQ (30 days)
Permit Applications Approved by NCDEQ (60 days)
Conduct Pilot Test (182 days)
Submit Detailed Design and Specifications Report (182 days)
Review Design Report with NCDEQ (1 day)
Bid documents, Procurement, Permitting (182 days)
Installation of Full -Scale Groundwater Remediation System (243 days)
System Start -Up and Optimization (90 days)
Submit As -Built Construction and Start -Up Information Report (90 days)
Notes:
* - Either submittal of the Effectiveness Monitoring Plan or
the pilot test work plan and permit applications (as
applicable) will fulfill section G.S.130A-309.209.(b)(3).
** - Actual time may vary due to a variety of factors
including agency review and approvals, weather delays,
equipment availability, etc.
Ongoing System Operation
Days
0 150 300 450 600 750 900 1050 1200 1350
I��
MWER,
\\ ���
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\\\\\\\\\
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ME
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EME
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IN
1
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EMN
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\\\\\\\\\
DUKE
4N DUKE
BY: R. ISHAM DATE: 12/5/2019
REVISED BY:
r ENERGY
CHECKED BY: S. WOOD
CAROLINAS
APPROVED BY: T.GRANT
PROJECT MANAGER: S. SPINNER
10
synTerra www.synterracorp.com
FIGURE 6-59
CAP IMPLEMENTATION GANTT CHART
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

L.Z,
I NOTES:
IVA,�����
♦� GYPSUM ♦♦♦♦,
STACK -OUT ARE
I
-�-►���-������taa_A ��i7C-��rv.°.'�'A"������`3�k�ieit""����s• '.W�Fl .$._ ,���
DUKE
ENERGY
C; _fNAS
10
synTerra
(IN FEET)
DRAWN BY: C. DAVIS DATE: 06/13/2019
REVISED BY: C. DAVIS DATE: 12/19/2019
CHECKED BY: T. GRANT DATE: 12/19/2019
APPROVED BY: T. GRANT DATE: 12/19/2019
PROJECT MANAGER: S. SPINNER
www.synterracorp.com
EGEND
lip
NOTES:
FIGURE 6-60
EFFECTIVENESS MONITORING WELL NETWORK
AND FLOW PATHS
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Interim
Monitoring Plan Corrective Action
(IMP) sampling Plan Approval
Effectiveness Monitoring Plan (EMP)
monitor downgradient and
background groundwater in
accordance with G.S. 130A-
309.214(a)(4)k for compliance with
NCAC 02L .0202 Groundwater Quality
applicable Standards
Based on
annual evaluation, Yes
is the remedial
system performance
effective?
M
Adjust remedial system
components; continue with EMP
or
Implement contingency plan in
accordance with CAP Update
Section 6.17.9; continue with EMP
Notes:
NCAC - North Carolina Administrative Code
02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and
Standards
No
Continue EMP sampling and Continue PCMP sampling
Annual Review and and Annual Review and
Reporting I I Reporting
Is the ash basin
certified closed?
No
Are the groundwater
monitoring results
below applicable
standards at the
compliance boundary
for three years?
Yes
Post -Closure Monitoring Plan (PCMP)
Post -closure monitoring to begin
Yes following closure certification.
Monitoring parameters and locations
to be determined at that time and in
accordance with G.S. 130A-
309.214(a)(4)k.2.
Yes
Based on \
annual evaluation,
is the plume stable
at the compliance
boundary?
Request completion of active remediation
or
Request completion of PCMP post -closure monitoring
in accordance with G.S. 130A-309.214(a)(3)b
DUKE
tENERGY
DRAWN BY: T. PLATING
REV ISHECK SED BY: J. WYLIE &
K
DATE: 10/112019
DATE: 12/16/2019
PROGRESS
CHECKED BY: T. GRANT
DATE: 12/16/2019
APPROVED BY: S. SPINNER
DATE: 12/16/2019
410
PROJECT MANAGER: S. SPINNER
WnTerra
I www.synterracorp.com
No
FIGURE 6-61
EFFECTIVENESS MONITORING PLAN
WORK FLOW AND
OPTIMIZATION FLOW DIAGRAM
FORMER UNITS 1-4 ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

Submit
Request for
Termination
Request shall include:
• Discuss duration and
cost for continuation
• Evaluate success of CAP
• Evaluate alternate
technologies
• Discuss health an
safety impacts if
constituent levels
remain
Demonstrate
• Continuation of CAP will
Implement GW
not result in significant
monitoring planJat
reduction of constituents
Has the site
Termination
location of no le
• Constituents have not and
been identified
authorized
after health
than one year'
Will not migrate onto
for resource
and safet
predicted time
adjacent properties
development
travel upgradienanalysisGW
discharge to surface
any existing owater
will not violate 02B
foreseeable rece
standards
Public notice of the request
per Rule 0.0114 (b)
Proposed termination is
consistent with all other
environmental laws
Is there
sufficient
evidence
.
•
that concentrations are
less than 02L standards
from multiple
sampling
events?
No
further
action

Corrective Action Plan Update December 2019
Cliffside Steam Station
Source Area 3
(Unit 5 Inactive Ash Basin)
SynTerra

Corrective Action Plan Update December 2019
Cliffside Steam Station SynTerra
Figure 6-63
Fly Ash and Bottom Ash Interbedded
Depiction
Included in Section 6 text

UNIT 5 INACTIVE ASH BASIN Dw
850 ---1 (WEST) (EAST)
OWN-
800
SAPROLITE
GROUNDWATER FLOW IS PERPENDICULAR TO
CROSS SECTION IN THIS AREA
a
� J
cq G m to
N N N N
Lo N Lo
O
Ln
\ TRANSITION
ZONE__-----
0 750
— \ / —
�,_
—_--- - ASH ---
---------------------------------------------------------------
Q
) \ \ /
) /
/
\ / \
NM__
�'�- `--` ___ _
---743.35':
-----------------------------------------------------------------------------
SAPROLITE _________________________
-- -----
ASH==-=-__-_-__-_-__-_-__-_-__-_-
--- --- --- ---
---
Z
/ \
-- --
-
-----------------------�
-----------------------------------------------
--------------------------------------------
� c
-\
iASH PORE WATER
-------------------------------------------
-------------------
-- _------
---------------------------------------
---------
O O
/ I / \ / / \ /
—
/
\ / j /
I / \ / / \ / j
-
—
ZONESITION ------------------------------------
-----------------------------------
----------------------------------
----------------------------------
'_-�
C9
_
Lr rL
W 700
\ \ \ \ I / \
\ /
\ \ I / \
\ \ I / \ / i \ I / \
\ \ I / \
--_---------------_---------------_--
------==-------------==---==
778.83.
----------------
SAPROLITE
-------
BEDROCK _
/ _ / �_ i —
/
/ _ i —
_ _ ___ =ASH PORE WATER
=--_ __=
\ /
709.03'
------------ __-
TRAN
704.09'
'ZONESITION�
AD5.41j
BEDROCK
\ / �
BEDROCK /
\
650
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
600
- gROAO RiRFR
..
O\ FORMER -
- UNITS 1-4
ASH BASIN
ASH
CLIFFSIDE s- STORAGE
STEAM rHEH -
STATION p
-s' AIT5 v < INACTIVE - ACTIVE
ASH BASIN
coN ASH BASIN
OL
Oq0 �
CCP
LANDFILL
NOTE:
CROSS SECTION D-D' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
LEGEND
U5 4S WELL IN SHALLOW FLOW LAYER
U5 4D WELL IN DEEP FLOW LAYER
U5 4BR WELL IN BEDROCK FLOW LAYER
1 U5 2S SLA WELL IN ASH PORE WATER
ABANDONED WELL/
U5 2S SL GEOTECHNICAL BORING
— GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
ASH
ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
V ASH PORE WATER ELEVATION
SHALLOW GROUNDWATER ELEVATION
V DEEP GROUNDWATER ELEVATION
V BEDROCK GROUNDWATER ELEVATION
761M WATER LEVEL ELEVATION (NAVD 88)
(LABEL COLORING BY FLOW ZONE)
WELL SCREEN
COMPLIANCE BOUNDARY
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
2. NM -NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL
DATUM (NAVD) OF 1988.
850
800
ro
750 c9
Q
Z
Z
O
Q
W
700 W
650
600

E _
(SOUTHWEST)
m
J
G N N �
N N N
800 >
� Ln
750
Co
0
Q
Z
Z 700
0
H
W
W
650
600
550
500
350
300
UNIT 5 INACTIVE ASH BASIN
U) C)
762.45' - ----------------------_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
--"'=�-c�---=-= ASH-=-=--- -----------------------------------------
----------------------
�y ==-ASH PORE WATER:=-=--= ---------
-----------------
------------------- -------- m
743.35'-===___-~!'__`_ --------------= FILL
37.3
TRANSITION
ZONE
714.221
SAPROLITE
'0.0.I
BEDROCK
ol
_ ks�
\\ / \�✓
BEDROCK-
E'
(NORTHEAST)
N
N
11
t9
1
-- BROAD
1 5.01, `. RIVER
674.73, \
TRANSITION
ZONE
672.8411 *1(
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIPWTTHINTHE PLANEOFTHE CROSS SECTION,AND VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO / I
ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
ARECONCEPTUALONLY.
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
2. NM -NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF 1988.
800
750
00
o0
0
Q
Z
700 Z
O
H
W LEGEND
CROSS SECTION LOCATION
U5 4S
WELL IN SHALLOW FLOW LAYER
ASH PORE WATER ELEVATION
650 U5 4D
WELL IN DEEP FLOW LAYER
SHALLOW GROUNDWATER ELEVATION
U5-46R
WELL IN BEDROCK FLOW LAYER
U5 2S SLA
WELL IN ASH PORE WATER
DEEP GROUNDWATER ELEVATION
v
GENERALIZED WATER TABLE
—
BEDROCK GROUNDWATER ELEVATION
—
BEDROCK FRACTURE ORIENTATION
WATER LEVEL ELEVATION (NAVD 88)
600 —�
GENERALIZED GROUNDWATER
(LABEL COLORING BY FLOW ZONE)
FLOW DIRECTION
0
ASH
WELL SCREEN
ASH PORE WATER
0
®
FILL
— — —
COMPLIANCE BOUNDARY
SAPROLITE
BREAKLINE
550
®
TRANSITION ZONE
BEDROCK
500
350
300

L-
(SOUTH)
UNIT 5 INACTIVE ASH BASIN
800
> > >
FILL > j
z 700
O
a
W
J
W
FILL
:""
1
1 .�
1 Jii
1 • iiii
1 ..■..
►� J��'
•
1=
ASH • 1
1
1
TRANSITION
/\ SAPROLITE
\ / 1
TRANSITION _
ZONE ■►I►``'�
/ \ /
BED\CI
BEDROCK
\
/ / — \ / \ / — /
LEGEND
ASH PORE WATER ELEVATION
NOTES
eRpq pRJVeR
GWA-37S WELL IN SHALLOW LAYER
V
SHALLOW GROUNDWATER ELEVATION
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON APRIL 22, 2019.
ry
r . fi_: °
GWA S7D WELL IN DEEP LAYER
2. NM -NOT MEASURED DURING 24-HOUR WATER LEVEL EVENT.
\� FORMER
U5 56R WELL IN BEDROCK LAYER
DEEP GROUNDWATER ELEVATION
3. ALL VERTICAL ELEVATIONS ARE MEASURED IN FEET, NORTH AMERICA VERTICAL DATUM (NAVD) OF
1988.
UNITS 1-4
— /^���r�
y BASIN\ASH ASH
ABANDONED WELL/
U5 7SL
BEDROCK GROUNDWATER ELEVATION
C IFF I E\ s�T�o�R�G-E
GEOTECHNICAL BORING
(
sTATI IN
1`__
GENERALIZED WATER TABLE
WATER LEVEL ELEVATION (NAVD 88)
>� UNIT
cr
-
(LABEL COLORING BY FLOW ZONE)
INACTIVE �,
ASH BASIN
=N c
1
_. y
r ACTIVE
\ ASH BASIN i
GENERALIZED GROUNDWATER
��
FLOW DIRECTION
NA
0
NOT AVAILABLE OR NOT MEASURED
i ...
t ,
' " .. r
_:'
I
0 ASH
o�1
�FAo
WELL SCREEN
r /
ASH PORE WATER
°q°
`
® FILL
— — —
COMPLIANCE BOUNDARY
CCp
Ak'Rp
SAPROLITE
DUKE
0 50 100 2 00
LANDFILL .'
IL
u �
.: -
® TRANSITION ZONE
ENERGY
HORIZONTAL SCALE: 1" = 200'
VERTICAL SCALE: 1"
NOTE:
BEDROCK
CAROLINAS
5X VERTICAL EXAGGERATION
"-
CROSS SECTION L-L' IS LINEAR IN NATUREAND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
DRAWN BY: J. CHASTAIN DATE: 10/22/2019
REVISED BY: D. KREFSKI DATE: 10/29/2019
-
PROJECTED ONTO THE CROSS SECTION.
ALLUVIUM
`�
CHECKED BY: T^GRANT.__ DATE: 10/29/2019
- L'
(NORTH)
m
W
O`
m
z
O
W
J
W
CROSS SECTION LOCATION

CURRENT
CONDITIONS
POSTCLOSURE
CONDITIONS FOR
CLOSURE -IN -PLACE
' fir ,-
=- in
_
r r • i,
1
4
UNIT 5
INACTIVE
SH BASIN
a'
•
bb j1
1
V��� ,.a" �a iwl 4 •,� ti �y I I 1 � 4
_'" � �':?l
h
� Il �7
ok�
III
\�
,
4
1`0
s,
lu \�
F\��1�
80 FEET
80 FEET
0 FEET
�•. ��.
0 FEET
77—
NOTES: WETLAND DELINEATION CONDUCTED BYAMEC FOSTER WHEELER
LEGEND 1.ASH THICKNESS ISOPACH SURFACES FROM FLOW AND TRANSPORT MODELS ENVIRONMENTAL AND INFRASTRUCTURE, INC. JUNE 2015.
-- APPROXIMATE SATURATED ASH THICKNESS (FALTA AND OTHERS, 2019). 4. NRTR - NATURAL RESOURCES TECHNICAL REPORT
/
DUKE
ENERGY
LE
250 GGRAPHIC SC 250 500
FIGURE 6-67
MODELED SATURATED ASH THICKNESS MAP
ISOPACH
ASH BASIN WASTE BOUNDARY
LANDFILLAREA BOUNDARY
2. THE SATURATED ASH THICKNESS CALCULATED USING THE APPROXIMATED 5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
BOTTOM OF ASH FROM THE FLOW AND TRANSPORT MODEL SIMULATION AND
SIMULATED HYDRAULIC HEADS UNDER CURRENT CONDITIONS. THE HYDRAULIC 6. ALL BOUNDARIES ARE APPROXIMATE.
CAROLINAS
(IN FEET)
FOR CURRENT AND POST —CLOSURE CONDITIONS
UNIT 5 INACTIVE ASH BASIN
DRAWN BY: C. DAVIS DATE: 06/07/2019
HEAD IN THE SIMULATION IS ABOVE THE TOP ASH AREAS WHERE PONDED
LANDFILL COMPLIANCE BOUNDARY WATER OCCURS, AND IN THESE AREAS THE SATURATED
D ASH THICKNESS IS 7. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRAERIAL
.DUKE ENERGY CAROLINAS PROPERTY LINE OVERESTIMATED. PHOTOGRAPHY OBTAINED FROM NORTH CAROLINA ONE MAP ON
DECEMBER 17,2019. IMAGE COLLECTED ON FEBRUARY 25.2019.
REVISED BY: C. DAVIS
CHECKED BY: T. GRANT
DATE: 12/18/2019
DATE: 12/18/2019
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
STREAM (AMEC NRTR)
®WETLANDS (AMEC NRTR)
3. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED THE
U US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION.. THIS MAP 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
STATE
Terra
APPROVED BY: T. GRANT
PROJECT MANAGER: S. SPINNER
DATE: 12/18/2019
MOORESBORO, NORTH CAROLINA
www.synterracorp.com
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND

a
a
7 .
i.
a
1
y
a
Sample ID (Depth)
BGSB-BG-2(2-3)
n
'
BG-02D (3.5-5.5)
BGSB-BG-2(6-7)
BG-02D (8.5-10)
BG-02D(18.5-20)
'
BG-02D (28.5-30)
Sample ID (Depth)
■ r r
BGSB-MW-32 (2-3)
_ r
% ' + ~
`1r►=,'
_♦`•
ARSENIC
+ MW-32D (3.5-5)
I/
. r
■
�,•.� MW-32D(8.5-10)
•
BGSB-MW-32(14-15)
MW-32D (18.5-20)
MW-32S (22.5-24)
+
■
• •
ARSENIC
`MANGANESE
r
r
1`•
Oe
•
1Li
4
iple ID (Depth) k''+A
•�
(33.5-35)'.r
(33.5-35) 4. ..�
'.%r
-
-
- Sample ID (Depth)
�„ \� •'
i✓�'i
�`� �.-'
GWA-03D (48.5-50)
•
• ��
•
Zoo
CHROMIUM
1• �Sample lD (Depth)
• �_
-
- I�f N
-
L�
t■N pH
%
l J
,
ASH
STORAGEAREA SPOIL
AREA
q '
•� I ''' -fir
��
,
fw.y�
LEGEND
sample ID (Depth)
.+
.� e f �( ±
�.�'
a •r
O BACKGROUND - NO EXCEEDANCES
GWA-318R (44)_
pH
•" {
.. ,f
m BACKGROUND - ONE OR MORE EXCEEDANCES
GWA-31D (7-7) -
GWA-31D(8.7-8.7)
• it
1 --_ -
■..
+ • • - - "
O LOCATION WITH NO EXCEEDANCES
PH
`
■ ->r7 _LL
• • ., _d'
• ■ ■ ■ ■ • A. $
,
LOCATION WITH ONE OR MORE EXCEEDANCES
!+.
'� `.
�,
+ - 6
ASH BASIN WASTE BOUNDARY
fix,-_
UNIT 5
■
ASH BASIN COMPLIANCE BOUNDARY
INACTIVE
" .., ASH BASIN
t _
�1 y
A� III
'�: ► ''
•' 7
LANDFILL/ ASH STORAGE AREA BOUNDARY
le ID (Depth) 7.
28.5-30) "
r
Sample ID (Depth)
LANDFILL COMPLIANCE BOUNDARY
im
GWA-osBRu (13s-15)
GWA-OSS (13.5-15)
., .
,I
— - DUKE ENERGY CAROLINAS PROPERTY LINE
yam` ,
;�`
''• '¢•
5
1 STREAM (AMEC NRTR)
•
NOTES:
.��
f °' ♦
•
�� f
{
1. DISCRETE SOIL SAMPLES EXCEED COMPARATIVE CRITERIA FOR CONSTITUENTS LISTED
UNDER THE SAMPLE ID.
III Sample ID(Depth) l
MW-42D (28.5-30)
2. SAMPLE DEPTH IS FEET BELOW GROUND SURFACE.
USA WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
■
,
WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
•"
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
afro +
�� `.�
•
AND INFRASTRUCTURE, INC. JUNE 2015.
4. NRTR - NATURAL RESOURCES TECHNICAL REPORT
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
r -
;•: f." Y IY
+
•
6. ALL BOUNDARIES ARE APPROXIMATE.
AERIAL PHOTOGRAPHY OBTAINED FROM NORTH MAP ON
-
D ARYCAROLINA20ONE
DECEMBER 17, 2019. IMAGE COLLECTED ON FEBRUARY 25. 2019.
r .�
S
`
'
8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
+ -
•
Sample ID (Depth)
- .d
.,
•
'�
COORDINATE SYSTEM PS 3200 (NAD83).
RIPS
%
:
MW-30D (3.5-5.5)
•y
•
BGSB-MW-30(6-7)
MW-30D (8.5- 10)
-
If' DUKE
GRAPHIC SCALE
250 0 250 500
FIGURE 6-68
BGSB-MW-30(14-15)
V ENERGY.
UNSATURATED SOIL SAMPLE
MW-30D(18.5-20)
CAROLINAS
(IN FEET)
LOCATIONS AND EXCEEDANCES
BGSB-MW-30(24-25)`
' -
DRAWN BY: C. DAVIS
DATE: 06/12/2019
UNIT 5 INACTIVE ASH BASIN
"
MW-30D (28.5-30)
• _ _
2-
A '
REVISED BY: C. DAVIS
DATE:12/18/2019
CORRECTIVE ACTION PLAN UPDATE
MANGANESE
■ Y
~r+'
��
CHECKED BY: T. GRANT
DATE: 12/18/2019
APPROVED BY: T.GRANT
DATE:12/18/2019
CLIFFSIDE STEAM STATION
1
�f
T -
�m
PROJECT MANAGER: S. SPINNER
MOORESBORO, NORTH CAROLINA
✓7.Terra
www.sVnterracorr).com

D-
850 (WEST)
x_
I
800 m
Q
L7
00 750
Q
Z
Z
O
Q
W
W 700
650
600
SAPROLITE
TRANSITION
ZONE
UNIT 5 INACTIVE ASH BASIN
GROUNDWATER FLOW IS PERPENDICULAR TO
CROSS SECTION IN THIS AREA
In
D'
(EAST) F— 850
==__-____-=--
ASH
SAPROLITE --------------------------------------------------------
-------------------------------------------------------
\ I \ — -- - - -- _— -_-_-__-_-__-_-__-_-__-_-__-_-----ASH=-==-_-__-_-__-_-__-_-__-_-__-
_ \ \ / - -- - ----------� - R usossl� 0 y
------------------------------------------------
1 ------ o O
------ ----------------------------------------------
---------- �-------------------------------------------- LI as
iASH PORE WATER R zci ------------------------------------------------ soa lc7
---------- -_---------------------------------_-_-_-_-_-_--_-
\ 54.9 _ _ _ _--------c______ _�_ _ _ _ _ _ _ _ _----------------- TDS 301
i______________________________
____________________________________
usozD 1as TRANSITION ------------------------------------ _ C9 2r rL
\ \ / — \ e 1zs \ / 1 — \ --_=ASH PORE WATER soa lT ewA
TDs az9 ZONE usaao
5L 1G�7 7 \ Li 2I.4 SAPROLITE
BEDROCK / — / \ \ \ i 33a _ \ / — / \ \ \ i / / 1 / \ \ / / - _-_ __ -_ _ _ -_ _ _ --_ _ ______ ou
_ R 159
TDS 319 / Li 5.9 MW-40S
_-_-__ _ __-__ _ ____--_ -__ / \ Soa 194 B <50
ZONESITION / TDS 343 Li 0.6 MW-40RRU
13 \ I \ / \ / I / \ / \ / I - __-__-- - / \ / I
\ \ / — \ \ / — — \ \ / — \ \ / — _ \ - - — \ \ / — \ \ \ saa 113 B <so
TDS 195 / \ I \ / I \ / / \ BEDROCK / — I I \ / B 165 \ / — / TD5 247 / Li 29
SO4 27.4 3 / 1 / .BEDKSO4 99
ROC/ / / \ TDS 211
TDS 433
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
- gR0A0 R 5f R
~.Fj.
\ ..FORMER
Q _ = UNITS 1 4
ASH BASIN
CLIFFSIDE r
STEAM
STATION p
AIT5 v
�< INACTIVE
r,. ASH BASIN
c� N
OL
oyo \
CCP
LANDFILL
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO
LEGENDJUNE
2019.
GWA 25S WELL IN SHALLOW LAYER
V
ASH PORE WATER ELEVATION
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (pg/L)
GWA-25D WELL IN DEEP LAYER
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS ARE
GWA 21BR WELL IN BEDROCK LAYER
SHALLOW GROUNDWATER ELEVATION
IN MILLIGRAMS PER LITER (mg/L)
' WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
AB 6S WELL IN ASH PORE WATER
0
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
DEEP GROUNDWATER ELEVATION
-NO DATA AVAILABLE
ABANDONED WELL/
AB 4APW
ANALYTICAL PARAMETER B Li SO4 TDS
GEOTECHNICAL BORING
BEDROCK GROUNDWATER ELEVATION
REPORTING UNITS pg/L pg/L mg/L mg/L
IT _ ` �
.
15A NCAC 02L STANDARD 700 NE 250 Soo
I
GENERALIZED WATER TABLE
MEAN BORON (B) CONCENTRATION (ug/L)
BACKGROUND THRESHOLD VALUES
s0 3 a s7
(SHALLOW FLOW ZONE)'
GENERALIZED GROUNDWATER
MEAN LITHIUM (Li) CONCENTRATION (ug/L)
BACKGROUND THRESHOLD VALUES
FLOW DIRECTION
s«
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
(TRANSITION FLOW ZONE)' S0 12 15 107
ASAE H BASIN
ASH
MEAN TOTAL DISSOLVED SOLIDS (TDS)
BACKGROUND THRESHOLD VALUES 50 11 17 120
CONCENTRATION (mg/L)
(BEDROCK FLOW ZONE)'
ASH PORE WATER
s - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING DATA
NA
NOT AVAILABLE OR NOT MEASURED
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO
DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
® FILL
- NOT ESTABLISHED
4NE
SAPROLITE
0
WELL SCREEN
® TRANSITION ZONE
' ,
Laa' BEDROCK
— — —
COMPLIANCE BOUNDARY
ofo DUKE
6° 120 240
1---_.1,
f;GAIFRAI
NOTE:
CROSS SECTION D-V IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
800
750 a?
❑
Q
Z
Z
O
Q
W
700 W
650
600
CROSS SECTION LOCATION

UNIT 5 INACTIVE ASH BASIN Dw
850 (WEST) j (EAST)
I II
GROUNDWATER FLOW IS PERPENDICULAR TO
CROSS SECTION IN THIS AREA
�y m a
N
800 m »>jLn
a
3
SAPROLITE FILL - -
_ _ FILL >
TRANSITION -_ -_
------ -----
00 cwameeu __`i ZONE __----- -----�---�---�---�---�---�---�---�---�---�---�-------�---�---�---
ps 45 \ / — ____-�__-�_--�---�---�---�---�---�---�---�---�---�---�---�---�---�---� vt
/ I \ / / \/ / \ / \ -_ _-__--- SAPROLITE---�---�---�---�---�---�---�---�---�---�---�---�---�---�
-------------------------------------------------------
Q \ \ /I — \ -_------- -�_ _-_ ---_--_--_--_--_--_-_- ASH=�---�---�---�---�---�-= s,
-----------------------
- — -- ------------------------------------------------
- - - usa�
Z 1 \ / / \ \ / \ / \I / 1 \ / ` / \ _ u��uBO o
---------- ---------------------------------------------
-- �__--------------------------------------------- o- n
O / _ i _ SASH PORE WATER s 3e�s------------------------------------------- s 374 Q a
\/ \ \ TRANSITION
/ __ ____
LU
700 \ / — I \ / — I \ / — I I \ / — I ------------------------------_-- -----------------------
W 1 / \ \ / \ / 1 / \ \ \ / 1 / \ _=-_-==__ I s as SAPROLITE
/ \ / I / \ / I / \ / I -__--ASH PORE WATER�__-_— �wa1
\BEDROCK / — \ / — / / _ _- -- _ _- --_ _ 1 / o-
_ s. s373� mw�
TRANSITION/ \
— \ Isr
ai ZONE__ /ua\ o-w-
BEDROCK
as,BEDROCi
650
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
NOTES:
600
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN
CALCUALTED BASED ON CENTRAL TENDENCY OF DATASET
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. CHROMIUM (Cr) AND STRONTIUM (Sr) CONCENTRATIONS
LEGEND ARE IN MICROGRAMS PER LITER (ug/L).
GWA 25S WELL IN SHALLOW LAYER V ASH PORE WATER ELEVATION * WELLS WITH DATASETS CONTAINING FEWER THAN FOUR
WELL IN DEEP LAYER VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP
e GWA-25D TO JUNE 2019 WAS USED.
ROgDRi�FR SHALLOW GROUNDWATER ELEVATION
GWA-21BR WELL IN BEDROCK LAYER - NO DATA AVAILABLE
•} i, ANALYTICAL PARAMETER Cr Sr
Ll
WELL IN ASH PORE WATER DEEP GROUNDWATER ELEVATION
_ \ REPORTING UNITS u9/L pg/L
V FORMER r., ABANDONED WELL/
- ASH BASIN AB 4APW GEOTECHNICAL BORING V BEDROCK GROUNDWATER ELEVATION 15A NCAC 02L STANDARD 10 NE
ASH _ '.1 . BACKGROUND THRESHOLD VALUES
O-EnME S �R= — GENERALIZED WATER TABLE (SHALLOW FLOW ZONE)' 26 34
MEAN CHROMIUM (Cr) CONCENTRATION (ug/L)
STATION GENERALIZED GROUNDWATER BACKGROUND THRESHOLD VALUES
Y J Q ' AIT5 I FLOW DIRECTION MEAN STRONTIUM (Sr) CONCENTRATION (ug/L) (TRANSITION FLOW ZONE)' 2 69
- < INACTIVE -
�,. ASH BASIN ACTIVE BACKGROUND THRESHOLD VALUES
ASH BASIN ASH NA NOT AVAILABLE OR NOT MEASURED (BEDROCK FLOW ZONE)3 93
ASH PORE WATER
� 1 -UPDATED BACKGROUND THRESHOLD VALUES WER
FILL WELL SCREEN CALCULATED USING DATA FROM BACKGROUND
GROUNDWATER SAMPLES COLLECTED FEBRUARY2010 TO
moom,
SAPROLITE
DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
CCP® TRANSITION ZONE — — — COMPLIANCE BOUNDARY
4)ENERGY
DUKE o so 120 - 240 FIGURE 6-69b
LANDFILL
Mp°Rqw
LANDFILL �= ROq°
BEDROCK
_ HORIZONTAL SCALE: 1"=2ao' GENERAL CROSS SECTI
fNOTE: VERTICAL SCALE. 1" - 48'
5X VERTICAL EXAGGERATION NON - CONSERVATIVE I
CATIONS NOT ALONG THE CROSS SECTION ARESSECTION D-VIS LINEAR IN CAROLINAS DRAWN BY: J. CHASTAIN DATE:10/30/2019 MEAN OF CHROMIUM (TOTAL) A
OJECTED ONTO THE CROSS SECTION.
REVISED BY: D. KREFSKI DATE: 10/30/2019 UNIT 5 INACTIVE ASH I
CROSS SECTION LOCATION �� CHECKED EDBY:S.SPINN^^^'^ GRANT DATE:10/30/2019 CORRECTIVE ACTION REPO
APPROVED BY: S. SPINNER DATE: 10/30/2019
CI IFFSII'1F RTFAM STI
1
850
800
750 c?
0
Q
Z
Z
O
Q
W
700 w
650
600

UNIT 5 INACTIVE ASH BASIN Dw
850 --, (WEST) (EAST)
800
750
❑
Q
Z
Z
O
Q
W
W 700
650
600
m
Q
O
SAPROLITE
_TRANSITION
ZONE
GROUNDWATER FLOW IS PERPENDICULAR TO
CROSS SECTION IN THIS AREA
111)
J00QN In In
0
_
ASH =-- - _-�__- .
_ __ __ _ __ __ _ __ __ _ __ __ _ __ __ _ __ __ _ ___ _
SAPROLITE _ _
Mn 59 \ \ \ / �-------- -- -- -----�---�---�---�---�==-==ASH
________________________________________________
ojm
------------
—_
/ASH PORE WATER Fe 6�&w ____________________ _---------- -_--_
crly)��,aa4 TRANSITION
---__---__---==---==- c'(VI), so.a29kON
Co 2&0
// -- -- Fe lalszLITE
_I -= ASH PORE WATER = _--__BEDROCK i Ra Ls i / __ Mn 1442\/ ( \ / / / \ / \/ \ / / /-_--__ -__ /TRANSI
Cr(VI) <0.025
\ \ \ co zs1 \ \ \ ------ / \ ZONE
\ — \ _ GWA-04o
s91o/I/1\\/\B��CKI/1\I/ `col)c939
Mn 4320
CROSS SECTION DOES NOT INCLUDE A BEDROCK
EVALUATION BORING WHERE OPTICAL TELEVIEWER DATA
CAN BE USED TO DETERMINE GENERALIZED FRACTURE
ORIENTATION.
LEGEND
GWA 25S WELL IN SHALLOW LAYER
eRG GWA-25D WELL IN DEEP LAYER
4pRi�FR WELL IN BEDROCK LAYER
- GWA-21BR
...
FORMER -
Q - - UNITS 1-4
ASH BASIN
ASH Y
CLIFFSIDE s- STORAGE
STEAM w rHEH -
STATION v -
>� Q -� ' AIT5 v < INACTIVE -
ASH BASIN ACTIVE
ASH BASIN
OL
Oq0 �
CCP
LANDFILL
AB 6S WELL IN ASH PORE WATER
ABANDONED WELL/
AB 4APW GEOTECHNICAL BORING
GENERALIZED WATER TABLE
—r GENERALIZED GROUNDWATER
FLOW DIRECTION
ASH
ASH PORE WATER
r ® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
NOTE:
CROSS SECTION D-D IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
NOTES:
GWA-015
MWAGS
Cr(VI)
Co
<0.0
sA425
Cr(VI)
CF.
0.694
oa
0.
356Fe
M
1
Mn
-6
29
MW-40BRU
_
Cr(VI)
Co
0.082
<a1
\ /
/
BEDROCK /
/
Fe
159
_ \
Mn
Ra
196
46
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON CENTRAL
TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. HEXAVALENT CHROMIUM (VI), COBALT (Co), IRON (Fe), MANGANESE (Mn), AND TOTAL
ASH PORE WATER ELEVATION RADIUM (Re) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST
SHALLOW GROUNDWATER ELEVATION RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
DEEP GROUNDWATER ELEVATION ANALYTICAL PARAMETER Cr (VI) Co Fe Mn Re
REPORTING UNITS pg/L pg/L pg/L pg/L pg/L
V
BEDROCK GROUNDWATER ELEVATION
`s
MEAN CHROMIUM (Cr VI) CONCENTRATION (ug/L)
Cr(VI)
<a025
MEAN COBALT (Co) CONCENTRATION (ug/L)
-
751
6266
MEAN IRON (Fe) CONCENTRATION (ug/L)
M
MEAN MANGANESE (Mn) CONCENTRATION (ug/L)
M- MEAN THALLIUM (TI) CONCENTRATION (pg/L)
FNAI NOT AVAILABLE OR NOT MEASURED
WELL SCREEN
COMPLIANCE BOUNDARY
15A NCAC 02L STANDARD NE 1* 300 50 NE
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)1 4 21 1700 760 2
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE), 0.6 5 1840 760 2
BACKGROUND THRESHOLD VALUES 0.7 2 7660 232 3
(BEDROCK FLOW ZONE)'
* - IMAC OFTHE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING DATA FROM
BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO DECEMBER 2018 AS
SUBMITTED IN JUNE 2019.
NE - NOT ESTABLISHED
850
800
co
750 �?
Q
Z
Z
O
Q
W
700 W
650
600

E _
(SOUTHWEST)
m
J
800
750
CO
0
Q
Z
Z 700
0
H
W
J
W
650
600
550
500
350
300
U"Is
UNIT 5 INACTIVE ASH BASIN
______________
TDS 2ll
--- -------==-.ASH =-_--__________________________________________
usmo--_--_-__--�-- -__ ASH POREWATER.. -=--- --------= J
B <so usozsue �- ________ ___________________________
Li 2a7 \ B 267 - _ _ti-_� _ _ ___ ___ ___ ___ _____ ____ ____ _ m
Li 54.9- - - - - -- _ _ _ FILL 1
504 3 SO4 145 ____
TDS 129 / \
,.� 429
TRANSITION
ZONE
Li I& \ = USA
'o Soa / LLi120
i 3 1 / SAPROLITE
SO4 22
\ / / \ •/ I / \ / / / \ / I / TDS 195 B Us-04
s135
Li 12
SO
a 22
TDs 77
BEDROCK / — / \ — \ / — / \ _�T�•� — \ / US-04D
Li 9.6
/ ♦\ I�\ / \ /T/ \ / \ I�\ / \ /i1/ \ / \ SO4 GSS04 76
\
<50
C4 is
ks
BEDROCK-
Ll
TDS 241 \
E'
(NORTHEAST)
f/i
m m
m
M M
N
N N
N
B I IN __ BROAD
Li as ----' GWh15S .` RIVER
Sc cs
TDS 181 / Li ca5 `�� -666'
SO4 41
GWA-02BRU
/
\
TDS
131
B
Li
504
TDS
127
IO7
69
269
\ /
I \
/ 1►♦ ;
/
/
TRANSITION
ZONE
GW.— —
\
\ /
I ♦x♦ \ / /
\ -� \ ;1
02BRR ♦ /
B 85 / X
B
Li
128
IaS
/
/ \
1 / � i
Li
TUS
54 _ / SO4
48 / \
♦\ ♦
63 \
♦ / '
� � i
UGWA-6MMRL95
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIPWITHINTHE PLANEOFTHE CROSS SECTION, AND
VERTICAL EXAGGERATION.
THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO
ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHSAND LENGTHS OF FRACTURES VERSUS DEPTH
ARE CONCEPTUAL ONLY.
800
750
R
00
0
Q
Z
700 Z
O
H
w
W LEGEND
CROSS SECTION LOCATION
U5 4S
WELL IN SHALLOW FLOW LAYER
650 U5 4D
WELL IN DEEP FLOW LAYER
U5 4BR
WELL IN BEDROCK FLOW LAYER
U5 2S SLA
WELL IN ASH PORE WATER
GENERALIZED WATER TABLE
GENERALIZED BEDROCK FRACTURE
ORIENTATION
600 —o,
GENERALIZED GROUNDWATER
FLOW DIRECTION
500
350
300
ASH
ASH PORE WATER
FILL
SAPROLITE
TRANSITION ZONE
BEDROCK
ASH PORE WATER ELEVATION
SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
BEDROCK GROUNDWATER ELEVATION
MEAN BORON (B) CONCENTRATION (IIg/L)
B MEAN LITHIUM (U) CONCENTRATION (ug/L)
s� MEAN SULFATE (SO4) CONCENTRATION (mg/L)
MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
0 WELL SCREEN
COMPLIANCE BOUNDARY
�— BREAKLINE
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM IANUARY 2018 TO
]UNE 2019.
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (Hg/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS ARE
IN MILLIGRAMS PER LITER (mg/L)
WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO ]UNE 2019 WAS USED.
-NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
REPORTING UNITS Ng/L Ng/L mg/L mg/L
1SA NCAC 02L STANDARD 700 NE 2S0 S00
BACKGROUND THRESHOLD VALUES SO 3 4 S7
(SHALLOW FLOW ZONE)
BACKGROUND THRESHOLD VALUES SO 12 15 107
(TRANSITION FLOW ZONE)
BACKGROUND THRESHOLD VALUES SO 11 17 120
(BEDROCK FLOW ZONE)
�-UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO
DECEMBER 2018 AS SUBMITTED IN ]UNE 2019.
NE - NOT ESTABLISHED

E _ 11111I- E'
(SOUTHWEST) (NORTHEAST)
pp UNIT 5 INACTIVE ASH BASIN
J
u6 LhNGm
> > N N N
800
YY�
Lf)wu)
usms > > >
a 0.7 ---
Sr
750 -=-ASH =--_-------- ----------------------------------_-
usmn - --_= _-------_-_-_=_- _ASH PORE WATER =-_-__-- _-__--__-
o<G.5---____- -________________________-_-_-__-__-__-__-
____
/
W FILL
_ - - - 08 _�
RANSITION
a ZONE Z7U0 Q N_ NN
0 9
SAPROLITE% (g09
yQ QQ 0
U.
w J -/ \/\ ' \Z / \— / — \//\ i \I \/ / ► /— \/_ \ ' \�\ �/I
----------- -- �BROAD D
w GWAaz RIVER
uso GWa366s'
BEDROCK 7 -
g
6SO \ /♦♦♦\ / / / \ \ L / \ / _ / \ \ / \ Sr / \ GWA- IMU / SY 500
/ ♦\ I / \ / \ / T / \ / \ / I / \ / \ /♦1 / \ / \ \ / \ Q o.5 \
/ ♦ I �h / — I \ / • I \ / — \ I ♦♦ \ / I \ / — \ I I \ TRANSITION
�\ /� / 1 / C•�.: \ / 1 \�.>\, / 1 / �\ / \ % 1 / 1 / �\ / \ 1 \ /� / N� �\ . ZONE
GWAAMW
GWAA20Rks
BEDROCK -v
\/�'�✓1/ �\/\I/1\ �\/�I/1/ �\/\I/1\ �\/\I/1\ �\/\I 1\ �\/\I`y��l�k�\/\I/�1\ ���/�
550 \\ / \I / 1 \ �\ / \I / 1 \ \ / \I / 1 \ �\ / \I / 1 \ �\ / \I / 1 / �\ / \I \ \ i / \I / 1 \ ��►\ / \I / 1 \,�\ /♦
EGWA-
3705
4 1 / j
500
350
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
,ORIENTATIONS
APPARENT
ERT CAL EXXAG ERATION. TT E ACTUALO CROSS SECTION, AND
NUM R O FFRACTURES ISFAR TOO NMO UERUS TO
ILLUSTRATE ATTHIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
300 /ARE CO NCEPTUAL ONLY.
800
750
R
00
0
Q
Z
700 Z
O
LU
W LEGEND
CROSS SECTION LOCATION
U5 4S
WELL IN SHALLOW FLOW LAYER
ASH PORE WATER ELEVATION
650 U5 4D
WELL IN DEEP FLOW LAYER
U5-4BR
WELL IN BEDROCK FLOW LAYER
SHALLOW GROUNDWATER ELEVATION
U5 2S SLA
WELL IN ASH PORE WATER
DEEP GROUNDWATER ELEVATION
GENERALIZED WATER TABLE
BEDROCK GROUNDWATER ELEVATION
_
GENERALIZED BEDROCK FRACTURE
ORIENTATION
o-G""0
MEAN CHROMIUM (Cr) CONCENTRATION (ug/L)
600 —�
GENERALIZED GROUNDWATER
sr 27
MEAN STRONTIUM (Sr) CONCENTRATION (ug/L)
FLOW DIRECTION
ASH WELL SCREEN
ASH PORE WATER
® FILL 0
COMPLIANCE BOUNDARY
SAPROLITE
® 550 TRANSITION ZONE BREAKLINE
BEDROCK
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRALTENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO
JUNE 2019.
500 2. CHROMIUM (Cr) AND STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS
PER LITER (ug/L).
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Cr Sr
REPORTING UNITS ug/L ug/L
350 15A NCAC 02L STANDARD 10 NE
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)' 26 34
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)' 2 69
BACKGROUND THRESHOLD VALUES 3 93
(BEDROCK FLOW ZONE)'
1 - UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
300 FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO
DECEMBER 2018 AS SUBMITTED IN JUNE 2019.

E _
(SOUTHWEST)
pp UNIT 5 INACTIVE ASH BASIN
J
N N N
800 7LDI
U Y
N UY 1A
US-01S
IIII��I�O
IIII■�L--
( I�;Im���iiii ■
M11J�\fit, �••� �■■
CO
0
Q
Z
Z 700
O
H
W
W
650
600
550
500
350
300
co vo \ --------------------- ____-__-= FILL
Mn 221
TRANSITIONZONE
---___
0.145 / GWA-0WBR
Us-ozD \ Cr(VI) <0.025
Cr(VI) 0.034 / Co 01 / SAPROLITE
Co Fe 852 \
/---/ / Fe 36740 Mn 125 / / US-04S
Mn 872 I / Ra 17 �� \ / / \ Cr (VI) 2.640
Ra vs / \— — I� / \ — \ / \ / co is
Fe 353
Mn 23
BEDROCK / — / \ — \ ' / — / \--T-L-� — / Ra US-D1D
Co -� \\//\ / I/\ //\\/�1�/ \ //\ Fe 113 ac \
29
Co 0.3
Fe 113 \ J'
Ra
9 Mn
ks
j
BEDROCK-
1B2S
Mn 197 \
EI
(NORTHEAST)
Q.'
m
m
M M
'R __ __L___-- BROAD
GWA 355
cr(vlw� aszoz cr(vp <o.ozs �\ RIVER
Co 0.2 / Co 16.9\\ -666'
Fe 431
Fe 208 Fe 16090
Mn 206 / Mn 1692
Re 0.331 \ Re
/ I \ TRANSITION
/ I►� / \ ZONE
Co 0.5 \ / \ --� ,\ / / \ WA-35D /
Mn 115 \ Cr(VI) <0.025 / X j p <0s2 \
co zs1 _ ;
R / / Mn 5910 Mn 119F. 6266 Fe 8
Alk
1\ A—
GWA-68BRL
I / \ / \ I \ / \ /
I / \ /
;FF.
0.1
276Min
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OFTHE CROSS SECTION, AND
VERTICAL EXAGGERATION.THE
ACTUAL NUMBER OF FRACTURES
ISFARTOO NUMEROUSTO
ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH
ARE CON CE PTUAL ONLY.
800
750
00
DD
0
Q
Z
700 Z
O
H
W LEGEND
CROSS SECTION LOCATION
U5 4S
WELL IN SHALLOW FLOW LAYER
650 U5 4D
WELL IN DEEP FLOW LAYER
U5 4BR
WELL IN BEDROCK FLOW LAYER
JU5-2S-SLAI
WELL IN ASH PORE WATER
GENERALIZED WATER TABLE
GENERALIZED BEDROCK FRACTURE
ORIENTATION
600
GENERALIZED GROUNDWATER
FLOW DIRECTION
550
500
350
300
ASH
.I ASH PORE WATER
® FILL
SAPROLITE
® TRANSITION ZONE
BEDROCK
NOTES:
ASH PORE WATER ELEVATION
SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
BEDROCK GROUNDWATER ELEVATION
MEAN CHROMIUM A (Cr) CONCENTRATION (ug/L)
a Iwo MEAN COBALT (Co) CONCENTRATION (ug/L)
MEAN IRON (Fe) CONCENTRATION (ug/L)
MEAN MANGANESE (Mn) CONCENTRATION (ug/L)
MEAN RADIUM (TOTAL)(Ra) CONCENTRATION
0 WELL SCREEN
COMPLIANCE BOUNDARY
�— BREAKLINE
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON CENTRAL
TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. HEXAVALENT CHROMIUM (VI), COBALT (Co), IRON (Fe), MANGANESE (Mn), AND TOTAL
RADIUM (Re) CONCENTRATIONS ARE IN MICROG RAMS PER LITER (Ng/L)
3. WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST
RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Cr (VI) Co Fe MM, Re
REPORTING UNITS Pg/L Ng/L Pg/L Ng/L Hg/L
1SA NCAC 02L STANDARD NE 1' 300 s0 NE
BACKGROUND THRESHOLD VALUES 4 21 1700 760 2
(SHALLOW FLOW ZONE)1
BACKGROUND THRESHOLD VALUES
(TRANSITION FLAW ZONE)' 0.6 5 1840 760 2
BACKGROUND THRESHOLD VALUES 0 7 2 7680 232 3
(BEDROCK FLAW ZONED
' - IMAC OFTHE 15A NCAC 021-STANDARD, APPENDIX 1, APRIL 1, 2013.
1-UPDATED BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA FROM
BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO DECEM3ER 2018 AS
SUBMITTED IN TUNE 2019.
NE - NOT ESTABLISHED

L-
(SOUTH)
UNIT 5 INACTIVE ASH BASIN
800
mMG
J
a,
> > >
FILL > j
Lh
FILLLh
z
z 700
O
a
W
J
W
— — — — — — — — — — — — — — — — — — — — — — — — — — — — —
FILL ----------------- - - - - - - - - - - - - - - -
'�----------------_------- _ - --
US-085 - - - - - - - - - - - - - - - - - - - - - -
<50 ►,� = �- ---------------
-
i c05-----=- -=----------
Ia z7 --—— — — — — —— ---- _ —
szn — — — — — — — — — — — — — - —_
SAPROLITE "Illb. — —--------------
— — — — — — — — — — — — — —
ASH PORE WATER -
-------------
------------
------------
TRANSITION US-msL
ZONE -- - - B 180
Li
\1, 1 usmD I B 1 331 - _ SAPROLITE
B 141 s04 194 / \ B WA- 400
229 / 1 \ \ \ / \ TDS 422 \ I / 1 \ SO4 184
TDS 362
TRANSITIONZONE
.1►
t4�5GWA-37s
US-WaRTDS2 I \ / - B 80
/ / 1 U 67.1 \ U 0.6
B — / BEDROCK — / / — / / —
TDS 14 4 / \ \ / \ / \ - \ / \ 182
/BEDROCK \ -
WA-37 GD
62'
Soo ono
PFORMER
UNITS 1-4
ASH BASIN
C 'TEAM E\ SSA E
STATION
UNIT
P=Q ` INACTIVE r y
ASH BASIN " ACTIVE
'c2 cv i 1 F� tk►� `` `- ASH BAS_IN', f
jLANDFILL �_ J.t4 -r iyjCCRgwROgO "
( _ NOTE:
"- CROSS SECTION L-L' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
- PROJECTED ONTO THE CROSS SECTION.
LEGEND
GWA 37S WELL IN SHALLOW LAYER
GWA 37D WELL IN DEEP LAYER
U5 5BR WELL IN BEDROCK LAYER
U5 7SL ABANDONED WELL/
0 GEOTECHNICAL BORING
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
0 ASH
ASH PORE WATER
FILL
�J SAPROLITE
® TRANSITION ZONE
BEDROCK
ALLUVIUM
V ASH PORE WATER ELEVATION
V SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
V BEDROCK GROUNDWATER ELEVATION
a
MEAN BORON (B) CONCENTRATION (ug/L)
MEAN LITHIUM (Li) CONCENTRATION (pg/L)
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
0 WELL SCREEN
COMPLIANCE BOUNDARY
- L'
(NORTH)
NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN CALCUALTED BASED ON
CENTRAL TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO
JUNE 2019.
2. BORON (B) AND LITHIUM (Li) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (Ng/L)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS) CONCENTRATIONS ARE
IN MILLIGRAMS PER LITER (mg/L)
- WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE
MOST RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B Li SO4 TDS
REPORTING UNITS Pg/L Pg/L mg/L mg/L
15A NCAC 02L STANDARD 700 NE 250 S00
BACKGROUND THRESHOLD VALUES
FL
OW
OW ZONE)' 50 3 4 57
BACKGROUND THRESHOLD VALUES 50 12 1s 107
(TRANSITION ROW ZONE)'
BACKGROUND THRESHOLD VALUES 50 11 17 120
(BEDROCK ROW ZONE)
'-UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO
DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
NE - NOT ESTABLISHED
CROSS SECTION LOCATION

L-
(SOUTH)
UNIT 5 INACTIVE ASH BASIN
800
m N) G
J
> > >
FILL > j L6
T
R.
z 700
O
a
>
W
J
W
FILL
--------------------
■■■■■■ J■■■■■I' a�i--- ' --
G3Y=QSpp� '
■■_:��� '
-------------
------------------
■�,
•_•--
ASH
• —ZONE Or 1 12.3
1
a 3.1 4 — SAPROLITE
Or 2.0
Sr 233
CC�uS-asD AN \ TRS�
TRANSITION
l \ ZO�`���'
NE
BEDROCK\
U€OBBR
Sar 33 — / / / / / \ \ \ — / \ / / / \ \ \ — / \ / / / \ \ \ — / / / / BEDROCK
/ / — \ / \ / — / / — \ / \ / — / / — \ / \ / — / / —
NOTES:
FORMER
UNITS 1-4
'e^s��_��r"tiy ASH BASIN
ASH
..: / 0-CSTEAME\ SSA E
STATION
UNIT5
P=Q ` INACTIVE
ASH BASIN " ACTIVE
ASH BAS_IN', f
ool
00, 1, 1
16
LAND ILL �,.. J.t4 -r iyjCCRgwROgO "
NOTE:
"- CROSS SECTION L-L' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
- PROJECTED ONTO THE CROSS SECTION.
LEGEND
GWA 37S WELL IN SHALLOW LAYER
GWA 37D WELL IN DEEP LAYER
U5-5BR WELL IN BEDROCK LAYER
U5 7SL ABANDONED WELL/
0 GEOTECHNICAL BORING
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
0 ASH
ASH PORE WATER
FILL
�J SAPROLITE
® TRANSITION ZONE
BEDROCK
ALLUVIUM
ASH PORE WATER ELEVATION
SHALLOW GROUNDWATER ELEVATION
DEEP GROUNDWATER ELEVATION
V BEDROCK GROUNDWATER ELEVATION
Us-MBR MEAN CHROMIUM (Cr) CONCENTRATION (ug/L)
0' >"' MEAN STRONTIUM (SR) CONCENTRATION (ug/L)
WELL SCREEN
COMPLIANCE BOUNDARY
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN
CALCUALTED BASED ON CENTRAL TENDENCY OF DATASET
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. CHROMIUM (Cr) AND STRONTIUM (Sr) CONCENTRATIONS
ARE IN MICROGRAMS PER LITER (u9/L).
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR
VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP
TO JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER Cr Sr
REPORTING UNITS Ng/L Ng/L
15A NCAC 02L STANDARD 10 NE
BACKGROUND THRESHOLD VALUES
(SHALLOW FLOW ZONE)` 26 34
BACKGROUND THRESHOLD VALUES
(TRANSITION FLOW ZONE)` 2 69
BACKGROUND THRESHOLD VALUES 3 93
(BEDROCK FLOW ZONE)'
1 - UPDATED BACKGROUND THRESHOLD VALUES WEIR
CALCULATED USING DATA FROM BACKGROUND
GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO
DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
- L'
(NORTH)
CROSS SECTION LOCATION

L-
(SOUTH)
UNIT 5 INACTIVE ASH BASIN
800
m N) G
J
> > >
FILL > j L6
Oz 700
a
>
W
J
W
FILL
--------------------
■■■■■■ J■■■■■I' a�i--- ' --
■ �mm_pp'
��
®1 .■�
SAPROLITE
QO
ASH PORE WATER
------------
����������������� �® IIII
Cr [VI)
MEMO
Ilii��l
Cr(VI 0.035
�— / \ _ Ra _ cr(vp is GWAo3o SAPROLITE
Fe <50C.
Mn 8 \ / \ / \ / — \ / \ / \ \ / \ / — \ Co s.4 \ / — — \ / \ Fe 163 / \ Cr VI) 01362 —
R.- \ 1 \ \ \ I / \ \ 1 \ \ \ I \ / \ / \ I 1 \ FO 410 \ / \ \ Mn 3222 \ I Fe 174 _
I \ I3.3
R. 3.3 CCR-WmD 1464
TRAN
5.4 \ / / / \ 1.6 ZONESITION ����
F.
Cr(VI) Ra <0.599
0.057 I I \ / Cr(VQ <O.C25
Cr IVI)&08SIR860
069D / \ \ \ I \ \ / i \ / \ \ \ \ \ \ \ 1 / / \ / / G 192.7
Co 40 \ / \ — / \ \ / / BEDROCK \ / \ — / \ \ / / \ \ — \ / \ — / \ \ / / \ \ — \ / \ — Min 31 \ / \ — \ / \ — / \ — \ / \
Mn 7866
Fe
RMin a Ra
<5BED\/ \ �/\ / I/\/\�/ I/
GWA-37D
—�rC, 01685
.3
Fe Mn 948
/ / — \ / \ / — /
NOTES:
- L'
(NORTH)
1. CONCENTRATIONS SHOWN ARE STATISTICALMEAN CALCUALTED BASED ON CENTRAL
TENDENCY OF DATASET USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. HEXAVALENT CHROMIUM (VI), COBALT (Co), IRON (Fe), MANGANESE (Mn), AND TOTAL
RADIUM (Re) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L)
3. WELLS WITH DATASETS CONTAINING FEWER THAN FOUR VALID RESULTS, THE MOST
LEGEND
ASH PORE WATER ELEVATION
RECENT VALID SAMPLE DATA UP TO JUNE 2019 WAS USED.
Q/jOq
oR1�eR
-NO DATA AVAILABLE
GWA 37S
WELL IN SHALLOW LAYER
SHALLOW GROUNDWATER ELEVATION
ANALYTICAL PARAMETER Cr (VI) Co Fe Mn Re
GWA 37D
WELL IN DEEP LAYER
REPORTING UNITS pg/L pg/L pg/L pg/L pg/L
DEEP GROUNDWATER ELEVATION
NE 1` 30o SO NE
15ND
"A FORMER I.r�
U5-5BR
WELL IN BEDROCK LAYER
SHOLD VALUEDARDS
BACKGROUND THRESHOLD VALUES
THRCACESHOLD
4 21 1700 760 2
UNITS 1_4
ASH BASIN
`. i ASH
U5-7SL
ABANDONED WELL /
BEDROCK GROUNDWATER ELEVATION
(SHALLOW FLOW ZONE),
BACKGROUND THRESHOLD VALUES
o.6 s 1Baa 760 2
(TRANSITION FLOW ZONE)
;cuFFSIDF\ =r STORAAGE
`
GEOTECHNICAL BORING
BACKGROUND THRESHOLD VALUES
(
STEAM �RREG
STATION
1., o
�I.
GENERALIZED WATER TABLE
ccaus�D
MEAN CHROMIUM (VI) CONCENTRATION (pg/L)
0.7 2 7680 232 3
(BEDROCK FLOW ZONE)
'
<�
UNIT a
_ r
Cr(VI)
-
MEAN COBALT (Co) CONCENTRATION (ug/L)
- IMAC OF THE 15A NCAC 02L STANDARD, APPENDIX 1, APRIL 1, 2013.
'LAN
` INACTIVE
ASH BASIN
�� tk►�.,, ''
r ACTIVE
` ASH BASIN', ?
_►
GENERALIZED GROUNDWATER
Fe
54
MEAN IRON (Fe) CONCENTRATION (ug/L)
1 - UPDATED BACKGROUND THRESHOLD VALUES WER CALCULATED USING DATA FROM
BACKGROUND GROUNDWATER SAMPLES COLLECTED FEBRUARY 2010 TO DECEMBER 2018 AS
•,' 1
(
FLOW DIRECTION
Hh
MEAN MANGANESE (Mn) CONCENTRATION (Ng/L)
SUBMITTED IN JUNE 2019.
'Del.
ASH
R.
<0.599
MEAN TOTAL RADIUM (R) CONCENTRATION (ug/L)
NE - NOT ESTABLISHED
)
�FAo
r /
ASH PORE WATER
`
®
FILL
WELL SCREEN
,;
M� `
Rgk
SAPROLITE
---
COMPLIANCE BOUNDARY
/ DUKE
I'
0 50 100 200
FIGURE 6-71c
GENERAL CROSS SECTION L-L'
LANDFILL PLL �,
N
u
qo ,_
qo
®
TRANSITION ZONE
ENERGY
HoarzoNrAL SCALE: 1"=zoo'
VERTICAL SCALE: 1"=40'
VARIABLE GROUP
ta._.
NOTE:
;::.",SI;
BEDROCK
CAROLINAS
5X VERTICAL EXAGGERATION
MEAN OF CHROMIUM (VI), COBALT, IRON, MANGA
"-
CROSS SECTION L-L' IS LINEAR IN NATUREAND ALL
DRAWN BY: J. CHASTAIN
REVISED BY: D. KREFSKI
DATE: 10/22/2019
DATE: 10/29/2019
AND TOTAL RADIUM
-
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
ALLUVIUM
`�
CHECKED BY: T. GRANT--
DATE: 10/29/2019
UNIT 55 INACTIVE ASH BASIN
CROSS SECTION LOCATION

Note:
*sampling events prior
to 1/1/2018
Affected /
(a 0Oo
x
Potential C j V-
Mixing Oo
o
�Oo
0
Generally O
Unaffected
o\° `
o `
80% rV 2
�.� 60% �`
• o\o
/40% * V
� � b
20% +♦p*� Z
CPO. 000 �Oo
0 0 0
Ca
°\o
� o\o
00 ry0
0
U5 AB East
GWA-37D
GWA-37S
GWA-4D
GWA-4S
MW-38BR
U5-6D
U 5-6S
CI ---w
Ash Pore Water Wells
ft U52S-SLA
• U5-07S*
A US-07SL*
Background Wells
■
GWA-30S
Z
MW-30DA
•
MW-30S
*
MW-32D
A
MW-32S
❑
CCPMW-01D
CCPMW-01S
O
GWA-30BR
♦
MW-30D
L
MW-32BR
o\o
O
80% 2
�.� 60 %
�40% V
20% 0* z
�Oo 000 �Oo
0 0 0
•E— Ca
11
GWA-2BRA
GWA-2BRU
GWA-2S
US-2BR
U5-2D
U5-3D*
p°
U5-3SA*
Op
Affected
x
�o \Potential
Mixing
Generally
Unaffected
nj Oo
G° 0 80%
x I�
.r 60% �O
00
0 40%
000
° * 20%
10
-0
0
US AB West CI —30

UNIT 5
INACTIVE
ASH BASIN
k^
a'
l
:. ■ 4.64
4.69
® t
5.39 .
6.46 All
6.72
5.43 I- 1
Tr
6.40
6.20 � 7.10
5.73
4.00 720
�;.• y
mum
4.79
14
i
LEGEND
i• ♦HAND AUGER SHALLOW GROUNDWATER ASSESSMENT LOCATION
pH
DITCH WATER ASSESSMENT LOCATION pH
APPROXIMATE PATH OF DITCH
ASH BASIN WASTE BOUNDARY
■ ASH BASIN COMPLIANCE BOUNDARY
310 STREAM (AMEC NRTR)
® WETLANDS (AMEC NRTR)
NOTES:
♦ 1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE
US ARMY CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP
IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE
x WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
WETLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER ENVIRONMENTAL
+(F' AND INFRASTRUCTURE, INC. JUNE 2015.
2. NRTR- NATURAL RESOURCES TECHNICAL REPORT
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
4.ALL BOUNDARIES AREAPPROXIMATE.
5. AERIAL PHOTOGRAPHY OBTAINED FROM NORTH CAROLINAONE MAP ON
DECEMBER 17, 2019. IMAGE COLLECTED ON FEBRUARY 25. 2019.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
DUKE
ENERGY
GRAPHIC SCALE
50 0 50 100
CAROLINAS
(IN FEET)
DRAWN BY: C. DAVIS DATE: 09/12/2019
REVISED BY:. DAVIS DATE: 12/18/2019
CHECKED BY: T. GRANT DATE: 12/18/2019
APPROVED BY: T. GRANT DATE: 12/18/2019
— __—
T _
PROJECT MANAGER: S. SPINNER
FIGURE 6-73
ASSESSMENT OF pH IN SHALLOW
GROUNDWATER AND DITCH
UNIT 5 INACTIVE ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
CLIFFSIDE STEAM STATION
MOORESBORO, NORTH CAROLINA

y'• , Lo
ft.
' - 'q * dN, r
L-'-�4
r. `t • , yS
IL
or j
IV
d�ft' ' '� � r .Y ,• ,,,�ti'' � , M r 4 ''' X' a � �
, 4*1
Jd _. ,� • • ,. i' r.i lanir /'•"..'.�'. Iw •7i
F 4
Y ' •.tin ' y , . F ,gam
4Li h R
" aA ILI,
.0 Mom tiM" { 4
FL�* Y;
e
�,� •r . r-iK- : w• . , :�� LEGEND
SLUICE DISCHARGE DELTA
' ASH BASIN WASTE BOUNDARY
f � -_ � � � • ASH BASIN COMPLIANCE BOUNDARY
■'ig r, r - .!�''4!y �1.�. NOTES
t 5 C{ - •~' _ ,, 1. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
•,� '' '' L �' ■ a ,�y4 2. ALL BOUNDARIES ARE APPROXIMATE.
i4� ' ,v ,,� ,1 ' * 3. AERIAL PHOTOGRAPHY OBTAINED FROM EARTH EXPLORER ON
•', f - - Y r _ • *, , IF—
NOVEMBER 20, 2016. IMAGE COLLECTED IN FEBRUARY 23, 1976.
A
# • :,,
;:', �I �' Fes. •�' �� + 4. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM RIPS 3200 NAD83 .
+ d DUKE GRAPHIC SCALE
f _ I ENERGY 100 0 100 200 FIGURE 6-74
• rI r ti *' CAROLINAS HISTORIC SLUICE DISCHARGE AREA
DRAWN BY: C.DAVIS DATE05/03/2019 UNIT 5 INACTIVE ASH BASIN
t REVISED Br. C.DAVIS DATE: 12/12/2019 CORRECTIVE ACTION PLAN UPDATE
' 'A ■ Rl�� '� ' S + w, p' CHECKED BY: T. GRANT DATE: 12/12/2019
APPROVED BY: T. GRANT DATE: 12/12/2019 CLIFFSIDE STEAM STATION
�,,�PROJECT MANAGER:S.SPINNER MOORESBORO, NORTH CAROLINA
W'e,�
�.
www.s nterracor .com