NC0004979_02_Allen_CAP Update 2019_Figures_20191231

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
FIGURES
(CAP Content Section 10)
SynTerra

SINPDES
OUTFALL
DUKE ENERGY CAROLINAS �I NPDES OUTFACE 006
ALLEN STEAM b
STATION BOUNDARY
DISCHARGE CANAL �
` f 8¢ NPDES NPDES OUTFALL 002B
LP OUTFALL 003
STEAM STATION
NPDES OUTFALL 001 COAL PILE AREA
PLAKT : ^ , NPDES OUT 004
NPDES OUTFALL 0021
RETIRED ASH BASIN
ASH LANDFILL RETIRED ASH BASIN
�(COMPLIANCEBOUNDARY�j ASH LANDFILL
fix BOUNDARY
TIRE@�aE 1 SIN
�RETIREDASH BASIN RE ASH LANDFIASH LL
RETIRED ASH BASIN ` _ NPDES OUTFALL 008
WASTE BOUNDARY ' ti
NPDES OUTFALL108
m
yVf1,PLfFE-sue. • NPDES OUTFALL 108B r
R o •.•� apt
GYPf;[IS'RA �`�
. ACTIVE ASH BASIN
NPDES OUTFALL104
� NPDES OUTFALL103
0
NPDES OUTFALL 002
ACTIVE ASH BASIN p
WASTE BOUNDARY x`
ASH BASIN
lCOMPLIANCEJ
{mot_ 1 BOUNDARY
NOTE:
�}1
WATER FEATURES DEPICTED WITHIN WASTE BOUNDARIES
OF THE ASH BASINS ON THE 2016 USGS TOPOGRAPHIC MAP
DO NOT REPRESENT CURRENT CONDITIONS. THE CONDITIONS
DEPICTED ARE SIMILAR TO THOSE SHOWN ON THE 1968 AND
q�
1973 USGS TOPOGRAPHIC MAPS OF THE AREA [(1968 WEST
SrG
CHARLOTTE (1:24000) AND 1973 BELMONT (1:24000)].
xr
SOURCE:
v
2016 USGS TOPOGRAPHIC MAP, BELMONT & CHARLOTTE WEST
V
QUADRANGLE, OBTAINED FROM THE USGS STORE AT
https://store.usgs.gov/map-locator.DUKE
p
It
ENERGY.
WINSTON-SALEM
CAROLINAS
GASTON
COUNTY
n
,!
FIGURE ES-1
USGS LOCATION MAP
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA
DRAWN BY: B. YOUNG DATE: 05/02/2019 [000
GRAPHICSCALE
REVISED BY: C. WYATT DATE: 12/08/2019 o z000 2,000
CHECKED BY: L. DRAGO DATE: 12/08/2019
APPROVED BY: L. DRAGO DATE: 12/08/2019 (IN FEET)
PROJECT MANAGER: C. SUTTELL

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 & INFRASTRUCTURE, INC. NATURAL RESOURCE
TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED
MAY 29, 2015.
2. ALL BOUNDARIES ARE APPROXIMATE.
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY
CAROLINAS.
4. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO
ON DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30,
2018.
5. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH
CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200
(NAD83/2011).
r
LEGEND
AREA PROPOSED FOR ACTIVE GROUNDWATER
REMEDIATION
ACTIVE ASH BASIN WASTE BOUNDARY
- - RETIRED ASH BASIN WASTE BOUNDARY
- - ASH BASIN COMPLIANCE BOUNDARY
_ RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY
RETIRED ASH BASIN ASH LANDFILL
- COMPLIANCE BOUNDARY
- - DORS FILLS BOUNDARIES
SITE FEATURE
- DUKE ENERGY CAROLINAS PROPERTY LINE
STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
ASH
STORAGE
fALLEEAMATION'
1
•' --ate
s
I
I
I
I
I
I
i
L'Arq
'DUKE
GRAPHIC SCALE
250 0 250 500
FIGURE ES-2
ENERGY
AREA PROPOSED
CAROLINAS
(IN FEET)
FOR CORRECTIVE ACTION
DRAWN BY: K. KING DATE: 06/19/2019
BY: J.KIRTZ DATE:12/19/2019
CORRECTIVE ACTION PLAN UPDATE
14 10REVISED
APPROVED BY: O DATE:12/19/2019
ALLEN STEAM STATION
CHECK .DRAGL.
CHECKED Be. L. DRAGO DATE: 12/19/2019
Sl/r'1TPr1'a
PROGRAM MANAGER: C.SUTTELL
BELMONT, NORTH CAROLINA

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure ES-3a
Proposed Corrective Action Approach
Well System Layout
(Vertical Wells Only)
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
ES-3b
Proposed Corrective Action Approach
Well System Layout
(Vertical and Horizontal Wells)
Provided in separate electronic figure file as a
large sheet size

SINPDES
OUTFALL
DUKE ENERGY CAROLINAS �I NPDES OUTFACE 006
ALLEN STEAM b
STATION BOUNDARY
DISCHARGE CANAL �
` f 8¢ NPDES NPDES OUTFALL 0102B
LP OUTFALL 003
STEAM STATION
NPDES OUTFALL 001 COAL PILE AREA
PLAKT : ^ , NPDES OUT 004
NPDES OUTFALL 0021
RETIRED ASH BASIN
ASH LANDFILL RETIRED ASH BASIN
�(COMPLIANCEBOUNDARY�j ASH LANDFILL
fix BOUNDARY
TIRE@�aE 1 SIN
�RETIREDASH BASIN RE ASH LANDFIASH LL
RETIRED ASH BASIN ` _ NPDES OUTFALL 008
WASTE BOUNDARY ' ti
NPDES OUTFALL108
m
yVf1,PLfFE-sue. • NPDES OUTFALL 108B r
R o •.•� apt
GYPf;[IS'RA �`�
. ACTIVE ASH BASIN
NPDES OUTFALL 104
� NPDES OUTFALL103
0
NPDES OUTFALL 002
�v,
ACTIVE ASH BASIN p
WASTE BOUNDARY x`
make
ASH BASIN
(COMPLIANCE)
{mot_ 1 BOUNDARY
NOTE:
�}1
WATER FEATURES DEPICTED WITHIN WASTE BOUNDARIES
OF THE ASH BASINS ON THE 2016 USGS TOPOGRAPHIC MAP
DO NOT REPRESENT CURRENT CONDITIONS. THE CONDITIONS
DEPICTED ARE SIMILAR TO THOSE SHOWN ON THE 1968 AND
q�
1973 USGS TOPOGRAPHIC MAPS OF THE AREA [(1968 WEST
SrG
CHARLOTTE (1:24000) AND 1973 BELMONT (1:24000)].
xr
SOURCE:
v
2016 USGS TOPOGRAPHIC MAP, BELMONT & CHARLOTTE WEST
V
QUADRANGLE, OBTAINED FROM THE USGS STORE AT
https://store.usgs.gov/map-locator.DUKE
p
It
ENERGY.
WINSTON-SALEM
CAROLINAS
GASTON
COUNTY
n
,!
FIGURE 1-1
USGS LOCATION MAP
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA
DRAWN BY: B.YOUNG DATE: 05/02/2019 [000
GRAPHICSCALE
REVISED BY: C. WYATT DATE: 12/08/2019 o z000 2,000
CHECKED BY: L. DRAGO DATE: 12/08/2019
APPROVED BY: L. DRAGO DATE: 12/08/2019 (IN FEET)
PROJECT MANAGER: C. SMELL

■
•t j,
6 k
/ ' ..
I �1
■
■
BG-3S 1Y r ri ;}A
_ BG-3D � �'•��
" i a "lk
I'
■
'GWA-17S GWA-27S
• CCR-3DA
• • GWA-17D GWA-27D
, � -;• CCR-lS CCR-2S .CCR-3D
AB-1 R
CCR-1 DA CCR 4SA
r���.., •-•; �. :, _ GWA-18S CCR-1D CCR-2D CCR-4DA
y. r' BG-2S • SB-12 `
{' BG-2D • / •` AB- 8S AB-39S AB-41SS
• •
L • AB-38SS AB-41 D SB-1
BG-21BRA-2 •. J • f • ■ 3B_3 AB-39D SB-
AB-38D AB-44AP �.
GWA-16S AB-44SS SB-13
CCR-BG-1S - AB-38BR
`♦ v * GWA-16D . - e • AB-44D SB-10
CCR-BG-1 DA
SB-2 SB-4 SB-5 AB
GWA-19S ■ AB-4
e
GWA-19D • AB-4
_ _
�• AB-37S AB-35S AB
AR-'�FiS
AB-37D AB-35PWS
• �15S RETIRED AB-36D
gB_1AB-35DV _ _ AB-35BR
• • AB-14D - J. r AB-2 JAB35_E
• AB-14BR • WA-14S
•
• • • • GWA-14DA I
• • • ■
■
• • : •• • • • GWA-22S S 10
R ' • GWA-22D
•
• StRGWA-2..1. S •• • • ••
• ••• •pAO GWA-21DA I AB-13S
r
AB-
R GWA-2
•••R00
1BR • •
• •••
11
LA I
00
• AB-4S • . r •� ' +
LEGEND AB-4D ■ . GWA-23S
MONITORING WELL IN ASH PORE WATER AB-4BR GWA-23D
MONITORING WELL IN SHALLOW ZONE _ M
o GWA-24SA
MONITORING WELL IN DEEP ZONE z GWA-9S
GWA-24D •
MONITORING WELL IN BEDROCK ZONE ! GWA-9D
>' GWA-24BR
ABANDONED MONITORING WELL GV1 GWA-9BR
SURFACE WATER SAMPLE LOCATION :. ' AB-20S
EFFLUENT SURFACE WATER SAMPLE LOCATION
• AB-20D
NON -CONSTRUCTED SEEP (APPROXIMATE) :
• DISPOSITIONED SEEP (APPROXIMATE)
F] IN -STREAM SURFACE WATER SAMPLE LOCATION • AB-21 PWA/PWS/OWAU/OWAL
PER SOC (APPROXIMATE)
SURFACE WATER/SEDIMENT LOCATION •°r . - -
SEEP/SEDIMENT LOCATION AB_12S -'
® SOIL SAMPLE LOCATION AB-12D r
• WATER SUPPLY WELL r -■ ,,� y
ACTIVE ASH BASIN WASTE BOUNDARY AB-5
- RETIRED ASH BASIN WASTE BOUNDARY y r R
ASH BASIN COMPLIANCE BOUNDARY I•'
-
fA
I
NPDES ;�
OUTFACE 006
v
Y -
J .
;I
NPD,
A 29S
4-29D .
4-29BR
CP-3S �♦
CP-3D
OUTFALL 002E
OUTFALL I
H/� CP-5D NPDES
GWA-30S UTFALL
GWA-30D • 00
- O2A
�.I CP-6S
CCR-8S CCR-9S
al
CCR-8D CCR-9D
E
AB 33 AB-32S
AB-33SS. AB-32D
ICCR-11 DAI
� - - -,- ��__NPDE
CCR-14S
CCR-14D
AB-26S G
AB-26D GWA-3D
GWA-3BRA/BRL
Toe Drain
SB-9 ® Outfall 108 F08
Drain Outfall 1088��
AB-23S " CCR-16S S-07
AB-236RU CCR-16D
CCR-16BR S-06
® - � S-05
CCR-17S
AB-22S CCR-17D
AB-21S/SL AB-22D p
AB-
AB-21SS AB-226R/BRL AB-10BR/BRL AB -
Toe Drain Outfall 104
•
AB-21BR/BRL CCR-18S Toe Drain
Outfa11103
CCR-21S CCR-18D F' NPDE:
S-02 Outfall
CCR-21 D 002
`' CCR-20S
PH WELL
CCR-22S PH ADJ CCR-20D
CCR-22DA r BLDG
°
GWA-2S •
GWA-1S GWA-2D
RETIRED ASH BASIN ASH LANDFILL WASTE ■ r
BOUNDARY* GWA-26D CCR-23S GWA-1 D 1
- RETIRED ASH BASIN ASH LANDFILL COMPLIANCE r _ . F,y� ^• • . CCR-23D GWA-1 BR
BOUNDARY BG-1S ~�• �� - •
DORS FILLS BOUNDARIES
i 1 BG-1 DA _ • r
SITE FEATURE f AB-11D
- DUKE ENERGY CAROLINAS PROPERTY LINE BG-16RCATAWBA RIVER
STREAM (AMEC NRTR 2015) _ BG-1 D • • - ' - S-01 - - (LAKE WYLIE)
-
® WETLAND (AMEC NRTR 2015) • • • .•
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 & INFRASTRUCTURE, INC. NATURAL
RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION
DATED MAY 29, 2015.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS
�5. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON
DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30, 2018.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
STATE PLANE COORDINATE SYSTEM PIPS 3200 (NAD83).
•
I
375 0 375 750
DUKE
ENERGY GRAPHIC SCALE IN FEET
AS
DRAWN BY: K. KING DATE: 05/07/2019
REVISED BY: C. WYATT DATE: 12/08/2019
APPROVED BY: L. DRAGO DATE: 12/08/2019
CHECKED BY: L. DRAGO DATE: 12/08/2019
T PROGRAM MANAGER: C. SUTTELL
H_2_DN
FIGURE 1-2
SITE LAYOUT MAP
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

_5
f r
DUKE ENERGY CAROLINAS
PROPERTY LINE I
jFUTURE DISCHARGE CANAL I
k',IFUTURE STEAM STATION
' \
FUTURE NPDESOUTFALL001 —\'
FUTURE COAL PILE AREA
IFUTURE
/ ASH BASINTIRED
/ ASH LANDFILL
r FUTURE RETIRED WASTE BOUNDARY ]I
FUTURE RETIRED ASH BASIN ASH
ASH BASIN LANDFILL '
FUTURE RETIRED / CATAWBA RIVER
ASH BASIN ' (LAKE WYLIE)
WASTE BOUNDARY ' '
FUTURE ACTIVE ASH BASIN
IFUTURE NPDES OUTFALL002
FUTURE ACTIVE '
ASH BASIN cv/
j WASTE BOUNDARY
A
�.,. LI '
Aff
MAY 15, 1948 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITE AT
'DUKE
ENERGY
CAROLINAS
14,
GRAPHIC SCALE
600 0 600 1200
IN FEET
DRAWN BY: A. FEIGL DATE: 01/28/2019
REVISED BY: C. NEWELL DATE: 12/10/2019
CHECKED BY: L. DRAGO DATE:12/10/2019
APPROVED BY: L. DRAGO DATE: 12/10/2019
PROJECT MANAGER: C. SUTTELL
www.synterracorp.com
FIGURE 1-3
1948 AERIAL PHOTOGRAPH
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

• •r , I
y • _
da
IVA
BG-4BR 'e-,
0 1'
i
-'6
� � I
AwmAs
BG-2S
BG-2D , ~ �,■� !�
GWA-16S ,. !
� � - • i CCR-BG-1 S C
V
• GWA-16D � "' RR-BG-1 DA •
GWA-19S
- GWA-19D
Ir
•
• •`� RETIRED ASH
•.
ASH
•
• • • • •• • • `
• • * • •
•
• ••
• • GWA-21S • ••
1
PRIMARY
• GWA-21DA • •POND 1
• • •• • • • SSRpNG RpPp • GWA-21BR <.. • •
•' PR _ _ • • • • • •
CAP • • • ;
go 0
o y
4. o` `
D +
LEGEND •
O GROUNDWATER SAMPLE LOCATION • y
SOIL SAMPLE LOCATION
SURFACE WATER SAMPLE LOCATION •
SEDIMENT SAMPLE LOCATION
• WATER SUPPLY WELL • ` 9 x , �-�
ACTIVE ASH BASIN WASTE BOUNDARY t ;, r• • �� w �. r
RETIRED ASH BASIN WASTE BOUNDARY AB-12S •a'' + 1 '
. ASH BASIN COMPLIANCE BOUNDARY AB-12D ;'
•
RETIRED ASH BASIN
ASH LANDFILL
1'
R
�t+ ,
~
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY �• _ `'' • T �'��a� .. ,� , f•:
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY ■� ' j
- DORS FILLS BOUNDARIES GWA-26S J� u�r' s
SITE FEATURE • GWA-26D r ray p �•
DUKE ENERGY CAROLINAS PROPERTY LINE - • _
STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015) BG-1 S
NOTES: BG-1 DA
BG-1 BR
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 FORJURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDSAND STREAMS BOUNDARIES WERE OBTAINED FROM STREAMlmkgm;mo4
AND WETLAND DELINEATION CONDUCTED BY AMEC FOSTER •
WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL
-
RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM
(' DUKE
375 0 375 750
GRAPHIC SCALE IN FEET
STATION DATED MAY 29, 2015.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY
CAROLINAS
DRAWN BY: K. KING DATE: 05/03/2019
CAROLINAS.
5. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO
REVISED BY: C. WYATT DATE: 12/08/2019
ON DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30,
CHECKED BY: L. DRAGO DATE: 12/08/2019
2018.
APPROVED BY: L. DRAGO DATE: 12/08/2019
PROGRAM MANAGER: C. SUTTELL
6. DRAWING HAS BEEN SET WITH PROJECTION OF NORTH
synTerra
www.synterracorp.com
CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200
FIGURE 4-1
BACKGROUND SAMPLE LOCATION MAP
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA
6

"�x
NORTH
GENERAL NOTES
1) GENERALIZED AREAL EXTENT OF MIGRATION REPRESENTED BY NCAC 02L
EXCEEDANCES OF BORON IN MULTIPLE FLOW ZONES.
2) GENERALIZED AREAL EXTENT OF MIGRATION REPRESENTED BY NCAC 02L
EXCEEDANCES OF SULFATE IN MULTIPLE FLOW ZONES.
3) PERMANENT WATER SUPPLY HAS BEEN IMPLEMENTED PROVIDING 191
SURROUNDING WELL USERS WITH WATER TREATMENT SYSTEMS, THIS WORK
WAS COMPLETED IN ACCORDANCE WITH HB630 AND SUBSEQUENTLY
APPROVED BY NCDEQ ON OCTOBER 11, 2018.
4) ALL BOUNDARIES ARE APPROXIMATE.
SITE FEATURES KEY
O GROUNDWATER FLOWS FROM RIDGES WEST, NORTHWEST, AND
SOUTH OF THE ASH BASINS THAT COINCIDE WITH GROUNDWATER
DIVIDES WHICH PROVIDE HYDRAULIC CONTROL OF CONSTITUENT
MIGRATION WITHIN FORMER STREAM VALLEYS AND AWAY FROM
POTENTIAL RECEPTORS AND WATER SUPPLY WELLS
® LIMITED COI MIGRATION THROUGH SAPROLITE, TRANSITION ZONE,
AND INTERCONNECTED BEDROCK FRACTURES. BEDROCK
FRACTURE OCCURRENCE DIMINISHES WITH DEPTH
© FORMER STREAM CHANNELS IN ASH BASINS
OPONDED WATER IN THE ASH BASINS CAUSES LIMITED AREA OF
DOWNWARD VERTICAL MIGRATION OF CONSTITUENTS NEAR THE
DAM DUE TO ELEVATED HYDRAULIC HEAD
© UPWARD VERTICAL GRADIENTS IN GROUNDWATER IMMEDIATELY
DOWNGRADIENT OF THE ASH BASIN DAMS LIMIT DEEP VERTICAL
MIGRATION OF CONSTITUENTS
AREA OF BORON CONCENTRATION IN GROUNDWATER GREATER
THAN CRITERIA (SEE GENERAL NOTE 1)
AREA OF SULFATE CONCENTRATION IN GROUNDWATER GREATER
THAN CRITERIA (SEE GENERAL NOTE 2)
00.► GENERALIZED GROUNDWATER FLOW DIRECTION
o- GENERALIZED ASH PORE WATER FLOW DIRECTION
-- 7 APPROXIMATE FORMER STREAM WITH FLOW DIRECTION
• ACTIVE ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
OGENERAL AREA OF WATER SUPPLY WELL USERS
(SEE GENERAL NOTE 3)
CONCEPTUAL CROSS-SECTION OF PRE -DECANTING CONDITIONS
(NOT TO SCALE - 4,500 LINEAR FEET)
DIKE/
(WS PONDED WATER DAM
TO BE DECANTED
ASH
2 CATAWBA RIVER
GROUNDWATER
DIVIDE 4 (LAKE WYLIE)
SAPROLITE •
TRANSITION ----

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 5-2
LeGrand Slope Aquifer System
Included in Section 5 text

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 5-3
Generalized Profile of Ash Basin
Pre -decanting Flow Conditions in the
Piedmont
Included in Section 5 text

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 5-4a
Water Level Map — Shallow Flow Zone —
March 13, 2019
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 5-4b
Water Level Map — Deep Flow Zone —
March 13, 2019
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 5-4c
Water Level Map — Bedrock Flow Zone —
March 13, 2019
Provided in separate electronic figure file as a
large sheet size

80-.-_.._..-..
44 �
t `STATION WATER INTAKE STRUCTURE
i \
DISCHARGE CANAL STEAM STATION \\ `
W.L. ELEVATION-570.00' GWA-29BR
(APPROXIMATE)
S'o NPDES OUTFACE 003 GWA-29D
\ \\\ ®® ®565.69S CATAWBA
(LAKE WLIE )R
NPDES OU I FALL 001 W.L. ELEVATION - 565.00'
\
570(APPROXIMATE)
0 � �
CCR-26131
CCR-26S CCR-26D 565.96
571.38 CPI
GWA-28BR
GWA-28D
8 �
S8S GwA-7D CP-2D CP 2S \ NPDES OUTFALL 004 CP 4D
HO I GWA-7S / 574.85 -_ III \\
583.25 \\ LIVE COAL PILE 565.36
-C CP-1D 590 90 \ \ 4 \\
• o \ V A\ VA o I
sno S
LSjO CCR-3S - COAL PILE
613.39 GWA-27D GWA-27S 00 ;
6+'' ----- CCR-3DA _ CCR-3D �592.22 CP5D
0 0
o
IV �A� GWA�BRL GWA-BDA <
I I `C =GWA-30S �
i I \� A - CCR-4S CCR-4DA 1 soo
o HOLDING BASIN I -
I
"' I � AB-41SS �� CCR-5S �IIII
I .� �.► 9606.27
I I AB-41D v v r� I�
_ _ _ r
AB-39D STRUCTURAL �v �� CP-6DBR
II FILL AB-44SS «:r} \\--__s9o- CCR-8S
CCR 7D CCR CP-6S
IAB-44D 605.74 --8D 585.03 568.44
® CCR-6S CCR-9D
o DRY 4AP AB-40D ®AB-40SS \ \ BPrICCR-6D - 588.10 CCR-9S
602.33 I 1 -_ - - - 577.4SSSO � 0 4
_- szo to to I I�
� � � I it I \ram • � � � -( 0 A&
���<-��_�------------_- _- - -_ S. 8�
1 I �� / o� AB-33S v9S
ro y
� I 7- 1I I � AB-02SS ®AB-42D I �� � � 600.41
1 I ',I 604.98 AB-42AP
�1 607.25 RETIRED ASH BASIN 3-
I li A598
B-43SS /�� / -
607.83
AB-43D
` 600
3AP®I II
1 1 I �✓ �-� � I 1 .,i - i t I�
I I I 6'47 0, RAB ASH LANDFILL COMPLIANCE BOUNDARY AB32S i III GwA-5D
1 \ 620 NM 1 NM -5S _
0 _ Q o 6zc AB-32D GWA-5BRL
I
GWA-5BRA
I / \ 0 630 60 • -
I I I I 650 I, m NM
' 11 111 0l II sso 6�0 �s7o ���
� 1\ 1 `OI iill `Ili
I
\ III
I
\ 1\ � I I I Illlli I IJ
LEGEND
NOTES:
m630m
INFERRED WATER LEVEL IN SHALLOW ZONE (NAVD 88, FEET)
DUKE ENERGY CAROLINAS PROPERTY LINE
1.
WATER LEVELS COLLECTED OCTOBER 24, 2019.
GWA-30S
WELL ID IN SHALLOW ZONE
ASH BASIN COMPLIANCE BOUNDARY
2.
NOT ALL UTILITIES ARE IDENTIFIED ON THIS DRAWING. THE UTILITIES SHOWN ON THIS
587.18
WATER LEVEL IN SHALLOW ZONE (NAVD 88, FEET)
RETIRED ASH BASIN WASTE BOUNDARY
DRAWING ARE VISUAL AIDS TO LOCATE THE STREAMS AND WETLANDS IN THE FIELD. THE
HORIZONTAL LOCATION AND VERTICAL LOCATION HAVE NOT BEEN FIELD LOCATED ON ANY
AB-39S
WELL IN ASH PORE WATER
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
UTILITIES AND THE SHOWN LOCATIONS ARE APPROXIMATE.
619.02
WATER LEVEL IN ASH PORE WATER (NAVD 88, FEET)
3.
THE TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE FRIS\NORTH
GWA-9D
WELL IN DEEP ZONE
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE BOUNDARY
CAROLINA FLOOD RISK INFORMATION SYSTEM AT
http://fris.nc.gov/fris/Download.aspx?FIPS=031&ST=NC&user=General%20Public AND A
GWA-9BR
WELL IN BEDROCK ZONE
0
WETLAND BY AMEC FOSTER WHEELER
DRAWING TITLED AERIAL TOPOGRAPHIC SURVEY-ALLEN STEAM STATION BY WSP, JOB
STREAM
NUMBER 157002.00 AND DRAWING FILE NAME APRIL 2014_ALLEN_FINAL_10-30-15.DWG
GWA-5BR
WELL ABANDONED
(AERIAL PHOTOGRAPH & TOPOGRAPHIC MAP BASED)
4.
RETIRED ASH BASIN (RAB) LANDFILL WASTE BOUNDARY BASED LINER LIMITS IN THE S&ME
WATER SUPPLY WELL
FLOW DIRECTION
DRAWINGS FOR THE RETIRED ASH BASIN (RAB) LANDFILL PHASE I, PROJECT NUMBER
7235-14-011, DATED 06-16-2015.
NPDES OUTFACE
NPDES OUTFALL (APPROXIMATE)
0
STREAM BY AMEC FOSTER WHEELER
5.
THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
NM
NOT MEASURED
OF ENGI NEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
®
NPDES REGULATED WATER FEATURE
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
BP
WATER LEVEL BELOW PUMP
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &
DRY
NO GROUNDWATER PRESENT AT THE
RIP RAP
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR
TIME OF MEASUREMENT
630
TOPOGRAPHIC CONTOUR (10' INTERVAL)
ALLEN STEAM STATION DATED MAY 29, 2015.
TOPOGRAPHIC CONTOUR (2' INTERVAL)
6.
DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO
DECEMBER 2017.
---------
PIPING OBTAINED FROM DUKE ENERGY,
STANTEC, AND SYNTERRA AOW INSPECTION.
7.
MARCH 03, 2018 AERIAL PHOTOGRAPH WAS OBTAINED FROM GOOGLE EARTH AT
https://www.google.com/maps/.
GROUNDWATER FLOW DIRECTION
9.
ALL BOUNDARIES ARE APPROXIMATE.
%'DUKE
ENERGY
CAROLINAS
161P
synTena
GRAPHIC SCALE
250 0 125 250 500
(IN FEET)
DRAWN BY: J. CHASTAIN DATE: 2/21/2018
REVISED BY: C. NEWELL DATE: 12/12/2019
CHECKED BY: L. DRAGO DATE: 12/12/2019
APPROVED BY: C. SUTTELL DATE: 12/12/2019
PROJECT MANAGER: C.SUTTELL
www.synterracorp.com
FIGURE 5-4d
WATER LEVEL MAP
SHALLOW FLOW ZONE
(OCTOBER 2019)
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

I
�IUWLO���
gym► ��'�\� �.. �.
"00".
i
CATAWBA RIVER
(LAKE WYLIE )
W.L. ELEVATION - 565.00'
(APPROXIMATE)
Rik
` D�
ES OUTFALL 004
CP4D
566.46 `
IVE COAL PILE
�6�0 1
0cP-aS
I I'
ii CP-1D sso sso \ \ o
579.19
soo \ I \ \ \ \
i
CCR-3S GWA-27D soo COAL PILE1r
- - - - - - CCR-3DA 585-98 ® � 4'j
CCR-3D --- GWA-27S �_ \�� CP5D568.52GWA-6BRA �io��� '`o� �' GWA-30D `O �� V A \ _NPD
- 585.46 2 I V A
may:. GWA-6DA i I \
� ,GWA-68RL 589.78 �i' II II 1 `V A V I•
\ �iGWA30S LI
Y ,' CCR-4SA
�6� i CCR-4S CCR-4DA � soo � I � I I I
I 0
1 1 ij1
I AB-41D CCR 5S CCR.5D I o Il
604.96 ®AB-41SS 59671
39D
9.31
G
STRUCTURAL r' I - --- -��� CP-61)
FILL 569.32
AB 44SS C _ - soo CCR-8D -� CCR-9D CP-
605.88 AB-40D �� CCR-6D -- CCR-7D = CCR 8S
I I 605.88 600.04 \ �� CCR-6S 589.16 - 588.77 CCR-7S ° 583.83 \ 578.25 -4
-9S li
Ln
- - -- 592-81D AB-33S - - - - !
I I
x
m I I o 603.84 i A 8S \
AB-33SS u � � � 1,A\� � I I
AB42AP �,
RETIRED ASH BASIN r Vv $9n j!
�595 1
I I l i AB-43SS � I
I I
®AB-43D �60v
A RAB ASH LANDFILL COMPLIANCE BO�UrNDA�RY
A&32S III
GWA-5S
o szo NM
I (
--- I 66$ ! GWA-5BRi
610.68
I II
it
AB-34D _
Isao\ \ )
AB-34S 6lu m
I I I II--�' - CCR-11S
650- '
660 CCR-11DA
I $ I I 67 o I J
I II �I
\f III
I�
5BRL
�w"lw
NOTES:
� m 630 m �
INFERRED WATER LEVEL IN DEEP ZONE (NAVD 88, FEET)
DUKE ENERGY CAROLINAS PROPERTY LINE
1.
WATER LEVELS COLLECTED OCTOBER 24, 2019.
GWA-29D
WELL ID IN DEEP ZONE
ASH BASIN COMPLIANCE BOUNDARY
2.
NOTALL UTILITIES ARE IDENTIFIED ON THIS DRAWING. THE UTILITIES SHOWN ON THIS
565.32
WATER LEVEL IN DEEP ZONE (NAVD 88, FEET)
DRAWING ARE VISUAL AIDS TO LOCATE THE STREAMS AND WETLANDS IN THE FIELD. THE
RETIRED ASH BASIN WASTE BOUNDARY
HORIZONTAL LOCATION AND VERTICAL LOCATION HAVE NOT BEEN FIELD LOCATED ON ANY
AB-20S
WELL IN ASH PORE WATER
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
UTILITIES AND THE SHOWN LOCATIONS ARE APPROXIMATE.
GWA-26S
WELL IN SHALLOW ZONE
3.
THE TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE BOUNDARY
FRIS\NORTH CAROLINA FLOOD RISK INFORMATION SYSTEM AT
GWA-9BR
WELL IN BEDROCK ZONE
WETLAND BY AMEC FOSTER WHEELER
http://fris.nc.gov/fris/Download.aspx?FIPS=031&ST=NC&user=General%20PublicANDA
GWA-5BR
WELLABANDONED
STREAM
DRAWING TITLED AERIAL TOPOGRAPHIC SURVEY-ALLEN STEAM STATION BY WSP, JOB
NUMBER157002.00AND DRAWING FILE NAME APRIL2014_ALLEN_FINAL_10-30-15.DWG
WATER SUPPLY WELL
(AERIAL PHOTOGRAPH & TOPOGRAPHIC MAP BASED)
4.
RETIRED ASH BASIN (RAB) LANDFILL WASTE BOUNDARY BASED LINER LIMITS IN THE S&ME
�-
FLOW DIRECTION
DRAWINGS FOR THE RETIRED ASH BASIN (RAB) LANDFILL PHASE I, PROJECT NUMBER
NPDES OUTFACE 002
NPDES OUTFALL (APPROXIMATE)
7235-14-011, DATED 06-16-2015.
NM
NOT MEASURED
0
STREAM BY AMEC FOSTER WHEELER
5.
THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
OF ENGI NEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
BP
WATER LEVEL BELOW PUMP
®
NPDES REGULATED WATER FEATURE
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
DRY
NO GROUNDWATER PRESENT AT THE
RIP RAP
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &
TIME OF MEASUREMENT
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR
sao
TOPOGRAPHIC CONTOUR (10' INTERVAL)
ALLEN STEAM STATION DATED MAY 29, 2015.
TOPOGRAPHIC CONTOUR (2' INTERVAL)
6.
DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO
DECEMBER 2017.
-------
PIPING OBTAINED FROM DUKE ENERGY,
STANTEC, AND SYNTERRA AOW INSPECTION.
7,
MARCH 03, 2018 AERIAL PHOTOGRAPH WAS OBTAINED FROM GOOGLE EARTH AT
https://www.google.com/maps/.
GROUNDWATER FLOW DIRECTION
9.
ALL BOUNDARIES ARE APPROXIMATE.
DUKE
ENERGY
CAROLINAS
synTena
GRAPHIC SCALE
250 0 125 250 500
(IN FEET)
DRAWN BY: J. CHASTAIN DATE: 2/21/2018
REVISED BY: C. NEWELL DATE: 12/12/2019
CHECKED BY: L. DRAGO DATE: 12/12/2019
APPROVED BY: C. SUTTELL DATE: 12/12/2019
PROJECT MANAGER: C.SUTTELL
www.synterracorp.com
FIGURE 5-4e
WATER LEVEL MAP
DEEP FLOW ZONE
(OCTOBER 2019)
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

89 r--.....-
\ NPDES OUTFALL002B
44
\ it STATION WATER INTAKE STRUCTURE
DISCHARGE CANAL STEAM STATION
V.L. ELEVATION - 570.00'
(APPROXIMATE) GWA 29BR GWA-29D
565.37
` S'o NPDES OUTFACE 003 ® CATAWBA RIVER
GWA29 (LAKE WYLIE )
\ NPDES OUTFALL 001 ® W.L. ELEVATION - 565.00'
570 (APPROXIMATE)
1
h'RX CCR-26BR
571.75
1 CCR-26S�CCR-26D 1 I CP-3S
X GWA-28BR _
574.34 � �
� — 575 � GWA-28D
I GWA-28S v l \
I
gill
GWA-7D T CP-2D CP2SII NPDES OUTFALL 004 CP4D
HC $$0 GWA-7S �. .r III AA CP4S��
N �v LIVE COAL PILE o
I
I
m
� � cP-1s ♦ I I , vvv l
i
CP-1D 590
II
COAL PILE \D\
__ II
g40
CCR-3DA CCR-3S \ CP-5S
GWA-27D®CP-5D,
NPDES OUTFALL 002A
D
\ o 600.77
I � -
°
I I
CCR-5S
1
AB-39D y_-- I 567.93
� � � _ �_ I I _ �_ � 567.93
I ``I
tS { CP-6D
II STRUCTURAL I � � ��� � �. i =—_ __ _�--� ��/ �
FILL
I I 590 CCR-813
AB�4SS '\
AE-44D ® AB-40D ®AB 40SS �� CCR 8S CCR-6D CCR-7D CCR-7S a —= S k
o N AB-44AP \, — CCR-8S CCR-9S CCR-9D
— — — — ------
o �/ AB33D AB33Sv��
I I I
I I /
AB-33SS XON
I+
RETIRED ASH
BA
I I AB-42AP
I I I I L
I
I: ®AB-44D t�I
I I 3AP � � ��,�" K c I � � � I "
y RAB ASH LANDFILL COMPLIANCE BOUNDARY
7 TAB-32S �I; GWA-5D
620 -� GWA-5S NM
I_ 620 AB-74M
GWA-5BRL
— Q NM
O I I I I{! GWA-5BRA
I 1 o s3o I ,.I;
oa
I a
W
CO
I II II II 650 ° ,�11I CCR-11S
I
1 I I II sso —s7o ��� o �� I I I CCR-11DA
I II
\\�
\ \ I o
LEGEND
NOTES:
IIIIIIIIIIIIiM630IIIIIm� INFERRED WATER LEVEL IN BEDROCK ZONE (NAVD 88, FEET) DUKE ENERGY CAROLINAS PROPERTY LINE 1. WATER LEVELS COLLECTED OCTOBER 24, 2019.
GWA-9BR WELL ID IN BEDROCK ZONE ASH BASIN COMPLIANCE BOUNDARY 2. NOT ALL UTILITIES ARE IDENTIFIED ON THIS DRAWING. THE UTILITIES SHOWN ON THIS
638.19 WATER LEVEL IN BEDROCK ZONENAVD 88, FEET) DRAWING ARE VISUAL AIDS TO LOCATE THE STREAMS AND WETLANDS IN THE FIELD. THE
( RETIRED ASH BASIN WASTE BOUNDARY HORIZONTAL LOCATION AND VERTICAL LOCATION HAVE NOT BEEN FIELD LOCATED ON ANY
AB-20S WELL IN ASH PORE WATER RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY UTILITIES AND THE SHOWN LOCATIONS ARE APPROXIMATE.
GWA-26S WELL IN SHALLOW ZONE RETIRED ASH BASIN ASH LANDFILL COMPLIANCE BOUNDARY 3. THE TOPOGRAPHY IS BASED ON LIDAR BARE EARTH DATA OBTAINED FROM THE
FRIS\NORTH CAROLINA FLOOD RISK INFORMATION SYSTEM AT
GWA-9D WELL IN DEEP ZONE 0 WETLAND BY AMEC FOSTER WHEELER http://fris.nc.gov/fris/Download.aspx?FIPS=031&ST=NC&user=General%2OPublicANDA
DRAWING TITLED AERIAL TOPOGRAPHIC SURVEY-ALLEN STEAM STATION BY WSP, JOB
GWA-5BR WELLABANDONED STREAM NUMBER157002.00AND DRAWING FILE NAME APRIL2014_ALLEN_FINAL_10-30-15.DWG
(AERIAL PHOTOGRAPH & TOPOGRAPHIC MAP BASED) 4. RETIRED ASH BASIN (RAB) LANDFILL WASTE BOUNDARY BASED LINER LIMITS IN THE S&ME
WATER SUPPLY WELL FLOW DIRECTION DRAWINGS FOR THE RETIRED ASH BASIN (RAB) LANDFILL PHASE I, PROJECT NUMBER
vPoes ourFnuooz NPDES OUTFALL (APPROXIMATE) O STREAM BY AMEC FOSTER WHEELER 7235-14-011, DATED 06-16-2015.
NM NOT MEASURED 5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
® NPDES REGULATED WATER FEATURE OF ENGI NEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
RIP RAP BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &
sso TOPOGRAPHIC CONTOUR (10' INTERVAL) INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT(NRTR) FOR
TOPOGRAPHIC CONTOUR (2' INTERVAL) ALLEN STEAM STATION DATED MAY 29, 2015.
6. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO
PIPING OBTAINED FROM DUKE ENERGY, DECEMBER 2017.
STANTEC, AND SYNTERRA AOW INSPECTION. 7, MARCH 03, 2018 AERIAL PHOTOGRAPH WAS OBTAINED FROM GOGGLE EARTH AT
GROUNDWATER FLOW DIRECTION https://www.goggle.com/maps/.
9. ALL BOUNDARIES ARE APPROXIMATE.
DUKE GRAPHIC SCALE
ENERGY 260 0 125 250 600 WATERU LEVEL MAP
(IN FELT)
CAROLINAS DRAWN BY: J. CHASTAIN DATE:2/21/2018 BEDROCK FLOW ZONE
REVISED BY: C. NEWELL DATE: 12/12/2019 (OCTOBER 2019)
CHECKED BY: L. DRAGO DATE: 12/12/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: C. SUTfELL DATE: 12/12/2019 ALLEN STEAM STATION
PROJECT MANAGER: C.SUTfELL BELMONT, NORTH CAROLINA
synTena www.synterracorp.com

If
F471W me,
L 1 t
t
t r t t rt t r r r f r
L t t r r r_4J.
ttz,trr
I . ~
~i '� a �, {.� � � � � � �`� ti -• 'R ,r rrr trr ttr r � ��� ~.i � . f r���r rat �, � '' � _�. ro
_6 toe
• • r. •t , w a a s r. �► a w
r w � +~ '`w i� �. � r �♦ r" � ,� f P� �"P ' �' �'�• ' i' O� Ji' �°i* his �'� �'►s �" "� r � T` .+
,
It A
----w �`--� --. t r P pr rfr rrP rrr rrr ) tT ,T , : _ �
t �r t r rrr rr? t 1 ttt t; TT 'fit f?
t t t 1 rr/t rtt� tttttt ttt tt�t =. y•
t'�t tttt ?r tstt tttt tt ttttII �Ittr Itt. ` rf�r�• • �, ��
- 4� err tr tt t
y
rrrr rtfr ?t P10
t �� fff , ._ --. =. -.. ­0 ~r
! y y ir-
'� �— r a. 'ems. y ^�� �•` • 6J , !
{ t4 * 1}t* ri 1 �► rr _ y
are �AllAer rrf �"►�► ���� �rfIt ►rl_0all
a_��� ►
All A(
r � ,� d � w .- � T •. a -�l 11 dl -� �, �..
Jr-
`frPr'si! rir`�ttr<rriP� �' �► � } ~� �
r I
a ti � ti
r r r `—
r
r ar r r
r ar sr r �
t" r'� e' all
&-r LEGEND
All�
sr
a�
ACTIVE ASH BASIN WASTE BOUNDARY
— - — - — - RETIRED ASH BASIN WASTE BOUNDARY
— - — - — - ASH BASIN COMPLIANCE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
•- Y - BOUNDARY
DORS FILLS BOUNDARIES
,r SITE FEATURE
DUKE ENERGY CAROLINAS PROPERTY LINE
STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
NOTES:
1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY).
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS.
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACKARROWS.
4. MODEL LAYER 14 FROM UPDATED GROUNDWATER FLOW AND TRANSPORT
MODELING REPORT FOR ALLEN STEAM STATION, BELMONT, NC (MURDOCH AND
OTHERS, 2019).
5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF
ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND
STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER
ENVIRONMENTALB. INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL
REPORT (NRTR) FOR ALLEN STEAM STATION DATED MAY 29, 2015.
1` `l ` y` 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
~ � � w r !1 1 � .� i +f �� •♦ l� �# (� DUKE 400 0 400 SOo COORDINATE SYSTEM FIPS 3200 (NAD63).
GRAPHIC SCALE FIGURE 5-5a
1 �' 1 • ' �' ENERGY® VECTOR VELOCITY MAP
0. }- (IN FEET)
f rd �
� CAROLINAS FOR PRE -DECANTING CONDITIONS
w ►� '�- DRAWN BY: C. WYATT DATE: 10/04/2019 SHALLOW FLOW ZONE
♦-ti v REVISED BY: C. WYATT DATE: 12/10/2019
CHECKED BY: L.DRAGO DATE:12/10/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L.DRAGO DATE:12/10/2019 ALLEN STEAM STATION
r r L � l �a PROJECT MANAGER: C. SUTTELL
r •— •- .r ti �, l 1 -- synTerra www.synterracorp.com BELMONT, NORTH CAROLINA

� r ,�
r 1 a t t t t r t t �1t� r r �.�� �`Alf
t i f t P t �' P P Tt P �' r r f �r e- -- •_
►�� a 1 l l ��. � � t t t r P r
l �� t t r P t i t � j t f r P r r � r � •-,� � .- .- •- .-
r')_
� �� t r - r r � � � P JP t� 11} 11'q jj f j �' �" � _„ '' •- .- .-
off
All
�� lei
All
All
AA
f LEGEND
�j■` Ilk" t t s y +a y 1= i► P�� �''r
F �� !► -► 9 �f � �♦r ►► P /gip rs ►F - ■ _ �F � � -
r +1 0. �'�� 0.~+ti wit �� '� �.��jA�pi�L r .��s y r► �r �y �� � '.� � � ^fir y � y y y�
t s, �' `� '1R �J' f, j • j,jrti'rr�Pfj'*J'��J' J �� �"a .'
0. +, �' /11}l° l Jar %r it r lr s -►+
►� ►� = j r 1 i r t r r f �` �► �. �. i' ACTIVE ASH BASIN WASTE BOUNDARY
s r 1 t 1 r
r �. + ~� t r • �r rr �� rr P Pf I / �°J, �'�. ~ �+ _. -e �� RETIRED ASH BASIN WASTE BOUNDARY
. ASH BASIN COMPLIANCE BOUNDARY
t t t t rt r f rfrr �r� >>r rr r f� r f • , ~=
r +. +� •� .r l J! a �-+ _RETIRED ASH BASIN ASH LANDFILL WASTE
+- +. Z �Pf % fJ■)y �► � �. 4-b �r -`. ='i} y ''.� � BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
toe
BOUNDARY
r �`rr ��■Z°�";r ^" �'"�" �-" -i y . ► -+ ' �' DORS FILLS BOUNDARIES
SITE FEATURE
y _� .-. �-. _.. - r ~ y ► ~ -. ■� -DUKE ENERGY CAROLINAS PROPERTY LINE
s` r r ✓ ►r �'��/ r '� t "' —� �� .�►� '--+ ~err �• ^. . .
rall
•%o� `ram r i • ~' y. a �' �� +~ STREAM (AMEC NRTR 2015)
f JJ `� Y a-- -,► --. � WETLAND (AMEC NRTR 2015)
f ■ �+ � � � � � � � NOTES:
►-- ti �,. a -�" ^'� ^� �+ �► ■ —,. • 1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY).
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS.
3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS.
tit ,< j� -f. Pp j -� -� r� �� �j rr �► ��* �� jl � )� A J � � � � �s jr■ . � � r� �� 4. MODEL LAYER 14 FROM UPDATED GROUNDWATER FLOW AND TRANSPORT
j�j %f •1r rF+ l'J, �� J� i� %•� �f r�� sA ��• �♦ �► MODELING REPORT FOR ALLEN STEAM STATION, BELMONT, NC (MURDOCH AND
��j j�� r j j� l•A�fjJs� %°�� if� f� !% r J� j%r■ � r J� � OTHERS 2019).
i �` �, ►� �, �� 4 / %r %r %� %r j ' r jr r f f� ' '%r �j 5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF
• 1 Y �� w ! �L ■ ■ri ■ rJr ��I �r �a1 �� r , rr r� �j jl /� r� F ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
d s r jr f j■ f� f ■ q— JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND
f �+y 61 J■ r f r+ 1• �-r STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER
.� %• /' r 'o f �r �.. ,� J fill ENVIRONMENTAL $ INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL
r ■ ► r� --r �► Z-r^,► ^ REPORT NRTR F �r J► t P f l► --. �-s y >w - +-t ► ■ (NRTR) OR ALLEN STEAM STATION DATED MAY 29, 2015.
0. 0. 1 a a a ��.��'• j / l j Jr i + ~ 6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
0. -+ ■ y - �"��rs s• r y -,4- COORDINATE SYSTEM FIPS 3200 (NAD83).
~ r ~ •� ~ ~ ~ �► ■ GRAPHICSCALE FIGURE 5-5b
r` DUKE 400 0 400 800
`' '� ~ 1 r L� VECTOR VELOCITY MAP FOR
�-� •-� a-`.y ti �' ti �'EN�ELRGY® INAS(INFEET) CLOSURE -BY -EXCAVATION CONDITIONS
DRAWNBY.'C.WYATT.WYAT DATE:10/00/2019 SHALLOW FLOW ZONE
ti �a REVISED BY: C. WYATT DATE: 12/10/2019
• CHECKED BY: L.DRAGO DATE:12/10/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L.DRAGO DATE:12/10/2019 ALLEN STEAM STATION
MANAGER: C. SUTTELL
r r r� °' : �► �`, syn errs PROJECT MAwww.s nterracor .com BELMONT, NORTH CAROLINA

r �I • f r f 1 �► t r • r it • I� F ►" �r �-+ " y. y i-.
.- ✓ ,< j L t rr. rt rr tr rr rr t {t '�t
d{ L t t t t r fP r r r ti t
r r P r r'♦, r �. -�
t t r r �' 1' T S r
d ~t t t r r r r r t+ t+ r r
♦� t I
♦W. r wl
k_'�,r�, �, ..,, �_ � -- f LEGEND
�~ �s. - t t '��� � �• ��. �'�, �=4 PPPJffr:*Pj'�r�r=�,"'.
�` r � � ~ � ,� � / `tom � � � ► `• � f J{ � � �•F � �# � y y � . � ar
r � � ►-� r � � ♦ � w � � ��-# � � • �F �a �� � .+ 'tea � �'� � � y
ti �. +� +r J r ♦ s �►'+ 'ter ' .'r . w �` �+�
ik
all
1-0
� � � � "� � �` � +�� � � %� f �' • �, �P pPr�:�` ��" �. ►e � �s � --a � �► � �r-A tiff �e -
ACTIVE ASH BASIN WASTE BOUNDARY
,
* ♦ +` � � 1 a 1. r_ � � � y- � 4. -' � RETIRED ASH BASIN WASTE BOUNDARY
a� � � ' ! � r rr rr rr %' r:• 7 � � � �+ � "�
���. ASH BASIN COMPLIANCE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE
T r .�F- w� :► l y� J f ! y ri w r4 y 4 �� Y �Y - -i Y A
1 ! / --r —e -.. a � � �-a �• �• --r —, � . +. +- BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
r r � r ^a � �► �'� --♦ � � � � � � .� � �+ -.. r BOUNDARY
DORS FILLS BOUNDARIES
All
% ��ar � ~ • Y. -i -/ � �a �. �. � �. �r `rr `' � .. SITE FEATURE
le,
ti v► r +�—DUKE ENERGY CAROLINAS PROPERTY LINE
.�
_w > STREAM (AMEC NRTR 2015)
Jel"�''rr :► f c. �'+ �� ��° i WETLAND (AMEC NRTR 2015)
All
f r ~t Ya.+ ♦ y '"w—i r+ �..r �� NOTES:
40—
�►
y A ~
r ti y 1 r w� y ♦ y 1. VELOCITY MAGNITUDES IN FEET PER DAY (FT/DAY).
Y v-ti �r �► r r �-r �r �-r y
2. VELOCITY VECTORS ARE IN THREE DIMENSIONS.
0 3. VELOCITY VECTOR DIRECTIONS SHOWN AS BLACK ARROWS.
� f P /* �` �-. 4. MODEL LAYER 14 FROM UPDATED GROUNDWATER FLOW AND TRANSPORT
} �%� j i� f■ -� �Y �� �� ��► �� �f �� �� w�^+ y --'� MODELING REPORT FOR ALLEN STEAM STATION, BELMONT, NC (MURDOCH AND
-i' �" I' 'y �'< .+� OTHERS, 2019).
i +` 1 I♦ !♦ %� 5. THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY CORPS OF
• r +� t41
f o f i i° J� %' P ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
+/ w � � � f f � � �. r �r f 1 � � � r -�► �+► • --F JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND
r� -.,� ,y STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER
L , +� �%♦ aJr d1♦ 17 Jf f ��+ �A� ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL
~ F' �' �` '� J • REPORT (NRTR) FOR ALLEN STEAM STATION DATED MAY 29, 2015.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
1 *� 'ram �- '+ -.► • : �* "� + �+ �► �+ COORDINATE SYSTEM RIPS 3200 (NAD83).
'� ,� �,- ~� .► .—. .�,% ►,r ti GRAPHICSCALE FIGURE 5-5c
a�". ( DUKE aoo o aoo soo VECTOR VELOCITY MAP FOR
!`.�� •`r�� 1 d �� �oil,
�'.- ENERGY N FEET) CLOSURE -IN -PLACE CONDITIONS
l
•� F� ►+ i �� a 1 ~ '� DRAWN BY: C. WYATT DATE: 10/04/2019
SHALLOW FLOW ZONE
REVISED BY: C. WYATT DATE: 12/10/2019
L. ,_ r � .•� i L � 1 � � CHECKED BY: DRAGO DATE:12/10/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L. PROJECT ALLEN STEAM STATION
OUTTELL DATE:12/10/2019
a
smTerra BELMONT, NORTH CAROLINA
.� —, www.synterracorp.com

NOTES:
1
LEGEND
� J 2 UP •. +.
\� CATAWBA RIVA
GYPSUML `� (LAKE WYLIE)
PA ; CLASS 8, WS-V
�SCHgRG ` ALLEN �STATION WATER
EC'QNgL, � STEAM INTAKE STRUCTURE ///////, • -` STATION
LIVE _
• �� COAL NPDES
� 1 PILE OUTFAL
,COAL
PILE i I
\ �� � HOLDING
J � � BASIN
J I i
E j
~
v j
y RETIRED ASH BASIN —
RETIRED h ASH LANDFILL
� ASH BASIN � —
biw -.
TFA L]
00
PRIMAR
•PRIMAR POND 3
' POND 1 PRIMARY "
� POND 2 • J�IIIIU� tl
MIR
ItDUKE
C' ENERGY
synTerra
_ 1
1
Toe Drain
p Outfa11104 S-04 1
Toe Drain S-03 NPDES
Out fall 103 OUTFALL 1
002
+ ' S-01
J ■
■
H 2_DN
I
I
r ♦�
may.
1
1
600 0 600 1,200
GRAPHIC SCALE IN FEET
DRAWN BY: K. KING DATE: 05/03/2019
REVISED BY: C. WYATT DATE: 12/06/2019
CHECKED BY: L. DRAGO DATE: 12/06/2019
APPROVED BY: L. DRAGO DATE: 12/06/2019
PROGRAM MANAGER: C. SUTTELL
www.synterracorp.com
FIGURE 5-6
MAP OF SURFACE WATERS
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

J / AL1 v
J V
♦ AL-1023
1*0
AL-1005
AL131
♦
8
P
O�
■ 1
AL19 /
~� - ~RIVER RUN AL8 AL 118
_ - y ...
AL9
AL2 AL17
i
j2q io AL11 AL26 AL21
AL16
ALzs
` AL27 AL24 L23 AL26
1 AL140
L136 AL110 AL-2010-RAW �
A
AL22
L12
AL28 L31 A
/ AL-1007 AL102 AL34 AL100
` AL14 AL29 AL33
Ll 5 AL6
AL30 AL7
GLEN LN AL123
HEATHER
68 AL-2003-RAW AL67
i�� ♦ — — — / ' z AL113 AL69
R AL141 AL70 f.
/ AL71
� RD AL75 AL72
• I:--.�'.~'� ' Y PLANT ALLEN RD—'�r _
' OAL59
OD LN
w ^ r � AL84 AL74 MIDW
u �� _f —� L r ✓' TROND RD AL62 AL60 p
m- r ' I PRMs AL83 AL76 AL64 AL61
w + AL114 AL65 AL63 ° ii �-` _ • ffj t
L77 A6 =
f ` AL82 AL2 AL54
AL66 Ap° AlAL3 / 1 L5
L57 5
Q AL81 AL78 AL55
r� AL79 AL51 AL53 AL58
AL95 , - � LEGEND
�r1 %� HIGHLAND WAY o
I `j � r WILDLIFE RD
AL5 AL49 • WATER SUPPLY WELL
1 ~r / • ;; 1 / _ '. 0.5- MILE RADIUS OF ASH BASIN COMPLIANCE
i Au17 ; t INSET
BOUNDARY
ERUN e AL35
SCALE: 1" = 550 ' ACTIVE ASH BASIN WASTE BOUNDARY
vf l `- _ I� -"---,- \ / a RETIRED ASH BASIN WASTE BOUNDARY
AL137 I-AKE MIST DR AL121 �_�. � ~ � � M1 I ti� -... .. �1 � rc
ACTIVE ASH BASIN COMPLIANCE BOUNDARY
ELRETIRED ASH BASIN ASH LANDFILL WASTE
AL-1021
R _ I` BOUNDARY
� `T° HGLN N '' � V Pa'�
° AL-1009
AL-2001-RAW Au1s Au30 //• •• / / I y RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
4 s� poo' AL13 •/ / r. 1 e g\°'Got BOUNDARY
op po AL-1000 y AL135 • SSYIt I BRP°fiDORS FILLS BOUNDARIES
AL-1008 1
a � °p AL-101 O HIGHLAND WAV
zpa AL-1016 AL-lozs:, y SITE FEATURE
SEE INSET -� •.� 1 — - - - DUKE ENERGY CAROLINAS PROPERTY LINE
°NON AL93 A 1 1 _ 0 1 TOPOGRAPHIC CONTOUR (10' INTERVAL)
..�Gsc ooRo AL-2012-RAW AL48 i
��e° AL47 �. 1 > STREAM (AMEC NRTR 2015)
O2 — AL-2013-RAW
_nLsa AL142 i 1 WETLAND (AMEC NRTR 2015)
NOTES:
•1
WOODBENDDR AL45 1. INFORMATION PROVIDED IN ALLEN STEAM STATION 1. HB 630 PROVISION OF
AL44 ; e} ice_ r + PERMANENT WATER SUPPLY COMPLETION DOCUMENTATION, DUKE ENERGY, AUGUST 1,
W\NGpO\NT°R 5= Aui2., `���- _ 4 2018 (APPENDIX D).
AL-1003 -� AL 129 / AL39 's ;� ��o¢° I rc
2. WATER SUPPLY WELLANALYTICAL RESULTS ARE LOCATED IN TABLE 1, APPENDIX C.
AL -too ALso �� o P' a' yS 3. NON -DUKE PARCEL BOUNDARIES PROVIDED BY NC ONEMAP, DATED 2018.
AL-ioiz Auza ,� [1 ��/�� http://data.nconemap.gove/downloads/vector/parcels
AL134 AL-i 022 AL-1006 Lai AL92 ♦ i �LV°ET LN 4. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE USARMY
AL-ioz6 `ter R l + CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE
cc°Oo AL-ioia .Nao ] W USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDSAND STREAMS
ALao ��W\�s°I - ` 1` ) BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION CONDUCTED
BY AMEC FOSTER WHEELER ENVIRONMENTAL& INFRASTRUCTURE, INC. NATURAL
O°ay ALa2 AL85 , , �� - ■ ,°MPH° �P" RESOURCE TECHNICAL REPORT (NRTR) FORALLEN STEAM STATION DATED MAY 29, 2015.
e•GWo AL-1001 Auzz ALaa I - AL97 `- a Ppe 5. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLYAND SHOULD NOT BE
I AL-1ov Auig ALiii 2° ° USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR
AL-2000-RAW AL103 �° BARE EARTH DATAOBTAINED FROM THE NORTH CAROLINA SPATIAL DATASITEAT
AL90 https://sdd.nc.gov/sdd/DataDownoad.aspx.
GE , AL--2005-RAW OOTWELL RD
ta° • ■ 6. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
K•Ni7F EGRG ._I �, .��. AL98 v f
B,SOT AL125 AL89 AL99 Auzo ♦ 7. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
• s AL-ioi 5 ALiza 3 AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
♦ \ Apsr p GPPR° 8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
■ ■ / l 4 ` -Ro AL126 ° + WINO _ F COORDINATE SYSTEM FIPS 3200 (NAD83/2011).
AL -zoo? -RAW ` 600 ORAPHICSC
ALE AL-1011 DUKE 600 1,200 FIGURE 5-7a
1 y
AL-2008-RAW - ENERGY (IN FEET) WATER SUPPLY WELL
DRAWN BY: K. KING DATE: 05/07/2019 SAMPLE LOCATIONS
�~ AL132 ~ REVISED BY: C. WYATT DATE: 12/10/2019
CORRECTIVE ACTION PLAN UPDATE
AL-1020 Al 127 ALLEN STEAM STATION
CHECKED BY: L. DRAGO DATE: 12/10/2019
APPROVED BY: L. DRAGO DATE: 12/10/2019
G��o
Jay/nTerra PROGRAM MANAGER:C.SL7rELL BELMONT, NORTH CAROLINA
AL-1018 POINT DR
www.synterraoorp.com

WDpO CONE
E
N\'N
ROG
cF �
a
I
/ ♦ i L�
II
f
O
■ 21,,
o
RIVER RUN • •
DJ �_
HEATHER GLEN LN,
lr
ANT ALLEN RD
�A/
71'.
SEE INSET -�
•. l
WOODBEND DR
g= • ;} `—,
• DANA "•IGHELLECT,�
�j
ZU
• S f 0 SE�\�SON RO
o REE
•
A.pTi
Y
lo
WARREN DR • • •
j ' •
V � � _ • • • • SOUTNPDINT DR
I • •
• • LEGEND
HEATHER GLEN LN J'
PUBLIC WATER SUPPLY
• ] WATER TREATMENT SYSTEM
'� a • • PARMR° OPT OUT OR NON -RESPONSIVE
LOCATIONS DEEMED NOT ELIGIBLE PER HOUSE BILL
ONC'RD MIDWOOD LN
^,I ARMs<R i 0 630 (BUSINESS/CHURCH/SCHOOL)
J • • LOCATIONS DEEMED NOT ELIGIBLE PER HOUSE BILL
o + 0 630 (BUSINESS/CHURCH/SCHOOL) BUT VOLUNTARILY
lo
g • SUPPLIED PERMANENT WATER SOLUTION
�r1 % HIGHLAND WAS • I WILDLIFERDVACANT PARCEL
�� m ,o.w•� • WATER SUPPLY WELL
0.5- MILE RADIUS OF ASH BASIN COMPLIANCE
tINSET BOUNDARY
• SCALE: 1 " = 550 ' ACTIVE ASH BASIN WASTE BOUNDARY
M/RETIRED ASH BASIN WASTE BOUNDARY
1
_ — - — - — ACTIVE ASH BASIN COMPLIANCE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE
• y��a"` �� BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
\OC'E CZ
BRAGEBR
DORS FILLS BOUNDARIES
SITE FEATURE
— - - — DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (10' INTERVAL)
1
STREAM (AMEC NRTR 2015)
1
1 WETLAND (AMEC NRTR 2015)
•
UTWE`•�■
a
r < }
% DUKE
,,, ENERGY
EMERgLDsyn
Powr DR
GRAPHIC SCALE
600 0 600
(IN FEET)
DRAWN BY: K. KING
REVISED BY: C. WYATT
CHECKED BY: L. DRAGO
APPROVED BY: L. DRAGO
PROGRAM MANAGER: C. SUTTELL
NOTES:
1. INFORMATION PROVIDED IN ALLEN STEAM STATION HB 630 PROVISION OF PERMANENT
WATER SUPPLY COMPLETION DOCUMENTATION, DUKE ENERGY, AUGUST 1, 2018
(APPENDIX D).
2. WATER SUPPLY WELL ANALYTICAL RESULTS ARE LOCATED IN TABLE 1, APPENDIX C.
3. NON -DUKE PARCEL BOUNDARIES PROVIDED BY NC ONEMAP, DATED 2018.
http: //data. n co ne m a p. gove/down I oads/vector/pa rce Is
4. 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 & INFRASTRUCTURE, INC. NATURAL
RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED MAY 29, 2015.
5. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLYAND 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
https://sdd.nc.gov/sdd/DataDownload.aspx.
6. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
7. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
3
8. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
_ COORDINATE SYSTEM FIPS 3200 (NAD83/2011).
1,200 FIGURE 5-7b
HB 630 PROVISION OF PERMANENT
DATE: 05/07/2019 WATER SUPPLY COMPLETION MAP
DATE: 12/10/2019 CORRECTIVE ACTION PLAN UPDATE
DATE: 12/10/2019 ALLEN STEAM STATION
DATE: 12/10/2019 BELMONT, NORTH CAROLINA

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 6-1
Fly Ash and Bottom Ash Interbedded
Depiction
Included in Section 6 text

A
(NORTH) LIVE COAL
PILE _
I I
600-
I I
I I
572.91'
550 568d 568.22'
571
COMPLIANCE BOUNDARY
fA
Y
OV>mm1111
Iwo,
rrar
aa
,y,� �
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��
0u33
te
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UUU
��
Vt7O9
C7t7 QQ
—
aaaa
QQ
- - - 573.44'
%72�8�0'
573.23'
571.76' 578.49'
573.74'
572.65'
�,90'
- -
S73.93'�
SAPROLITE
572.87'
SAPROLITE
1
573.97'
573.33'11.
-
500
569.27 571.95'
, \ 586.55' \
/ 1 572.98'
/ 1
TRANSITION ZONE
450
oo
1572.95'
/\-
- \ /N-\- 1'/�- �\ 1�— \'/�- �\ - \/�-- ---
l
\ \ j--
1'/�- �\ - \ j/�-\- 1'/�- �\ - \%/�-- \-
'/�- �\ - 1/�-\- \'/�- �y - 1 r569.56'
i /' ' `l i` / I ' `l i� / I i /' `l
` ' I ' i ' '
l ' I ' i /' BEDROCK' / I '
/I
i`
\ ��\//I / \\ \ ��`BEDROC�
7
I \/ I \/ _
I �/ I \/
/1��\2\
Lu
W
\lam �rl-\/il\r(i lii'I'/li\l�i'�\/ilk/li\lei
rl�
/il\r(i\lei rl�\/il\r(i\l�i'I'\/ilk/li\lei
/I�\/ilk/li\l�i'I'
250`/
\'I
200
l�i�/i�/i`'�'`l'i�/'�`l'i`'�'`l'
150
�/i�/
�/
ARTESIAN
10
CONDITIONS
\l :. `l I' N `l' `l'
I'
\/ %�
%.
-
/' / /' i`'''
\ \ I\I I ' / 1 ` ' -/ \I
I / 1 ` '
-/ \I \ / \ I / 1 ` ' -/ \I \ / \ ' / 1 ` ' -/
/'.
\I \ ' \ '
_ A'
(SOUTH)
SAPROLITE
-
\ BEDROCK
I IN
50
00
LEGEND
CANAL ROAD
ALLEN GWA-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
V
SHALLOW ZONE FLOW LAYER GROUNDWATER
NOTES
STATION y GWA-22D
WELL IN TRANSITION ZONE
WELL WATER LEVEL ELEVATION
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
A GWA-21BR WELL IN BEDROCK
DEEP ZONE FLOW LAYER GROUNDWATER
2. GROUNDWATER FLOW IS APPROXIMATELY WEST TO EAST, PERPENDICULAR TO THE CROSS SECTION.
3. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING AT
PLAN' L N RD.
WELL WATER LEVEL ELEVATION
SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
AB 35S
WELL IN ASH PORE WATER
CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
BEDROCK FLOW LAYER GROUNDWATER
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
RETIRED
' ASH BASIN CCR-11D
ABANDONED WELL/GEOTECHNICAL
WELL WATER LEVEL ELEVATION
4. ALL BOUNDARIES ARE APPROXIMATE.
5. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
BORING
ASH STORAGE/
S RUCTURALFILL) RETIRED � _ �
•y°.._ ASH BASIN
GENERALIZED WATER TABLE
WELL SCREEN
ASH LANDFILL 1
'
ALLUVIUM
568.66,
WATER LEVEL ELEVATION (NAVD 88)
FILL
(LABEL COLORING BY FLOW ZONE)
GRAPHIC SCALE
CATAWBA
0 112 225 450
RIVER
o (LAKE WYLIE) 0
SAPROLITE
- - -
COMPLIANCE BOUNDARY
DUKE
®
TRANSITION ZONE
ENERGY
HORIZONTAL SCALE: 1" = 450'
VERT
PPMSjAONGROPO'C, ACTIVE
ASH BASIN 0
BEDROCK
CAROLINAS
SXVEIRTICALCAL EXAGGERATION
GENERAL CROSS SECTION A -A'
DRAWN BY: C. NEWELL DATE: 9/13/2019
CORRECTIVE ACTION PLAN UPDATE
PREDOMINANT BEDROCK
REVISED BY: C. NEWELL DATE: 12/5/2019
FRACTURE ORIENTATION
CHECKED BY: L. DRAGO DATE: 12/5/2019
ALLEN STEAM STATION
APPROVED BY: C. SUTTELL DATE: 12/5/2019
CROSS SECTION A-A'IS LINEAR IN NATUREANDALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
GENERALIZED VERTICAL
PROJECT MANAGER: C. SUTTELL
BELMONT, NORTH CAROLINA
PROJECTED ONTO CROSS
HYDRAULIC GRADIENT
LAYOUT: FIG-6-2
DROSTHE
S SECTION LOCATION
synTena
www.sVnterracorlD.com

(WEST) COMPLIANCE BOUNDARY �,
I (EAST)
STRUCTURAL STRUCTURAL
FILL FILL
Q ASH STORAGE BEND IN COAL PILE
700 4y I
NCROSS SECTION
11 I m m I Q J
� I I
NNN Ic.)c) U)U)am am MG lu
aco Moo co coyC7 rt 650 mtm.>3333
__=-=_===-=_=-=_=-=_=-___________ to G m fA G m
01
=--=----�---�____----= ===_===_===_===__===_===_===_== Q Q ao ao ao o> a rn R
—CA
DRY =__
A$ H PORE __ _ _-_ _ _ _-______ _____ _____ _____ ___ ___ _---~__=Y=--= _ -_-_-_-__-_ _ _ _ _ _ _ - _ _ N N NNN N N lV
WATER
=F=====-=-==-=-==-=-==-=-==-=-===-=-=== ___-==T = d d d d a a a a a a c rn
--
_— =-_____ 0� )L600 631.32' .02- ==== _-- _600.46' 597.01
________
SAPROLITE t9 t7 c9 —e— c9 c9 c9 Ma Ma
— —
630.96' 087.18 581.3� 574.85' 574.75' —
550 TRANSITION ZONE 19.31' I
♦ 574.41' _
589.0 TRANSITION ZONE -
/'` 631.03' SAPROLITE -
\ �l. J 585.46'
�Ti
0 \/\ /\, \ \ /1, \/\ /\� \ \ /1, \/\ /\, \ \ /1, \/\ /\, \ \ /1, \/\ /\, \ \ /1, \/\ / \, \ \ /1, \, \ / � 589.78'
t'I 605.88'
III 591.43'
ILI
\ ., �. �► _\ ./ �.�/ _\ ./ — .�/ ., e-�y, — _\ ./ �.�/ \ Ali — �../ —..
`/ \�., — Y`/ �►..� _� / — _\../ ——\111./ �.�/ \ ./ — ., y \
�7
450 9:64'/- � `/!�;{►,- \�-, � �\�/ -1 =-��'/- \
\\ X// /
/1
B�dCM9 do \
400
�, \`'t`►/ \ \'/ -\ \ - 1'/\-/ \ - 1'/ -\ \ � 1'/`-/ \ - 1'/ -\ \ - \'/`- \ - 1'/ -\ �y \'/\-/ \ -_1'/ -\ \ - 1'/`-/ \ - 1'/ -\ \ � \'/\-/1 \ - 1', -\ \ - \'/\-/ \ - 1'/ -\ \ � \'/ -/ \ - 1'/ -\ \ - \'/\-`\ - 1', -\ \ � \'/\-/ \ - 1'/ -\ \ - \'/`-/ \
350
200
/_\/\'/1`/ /\I� /\ ��/\I/1`/ /\I� /\ � �/\'/1`/ /\I� /\ ��/\'/\`/ /\I� /\ � �/\I/1`/ /\I� /\ ��/\'/1`/ /\I� /\ � �/\I/1` / /\I� /\ � �/\I/1`/ /\I� /\ � �/\' \`/ /\I� /\ ��/\I/1`/ /\I� /\ � �/\I/1` / /\I� /\ ��/\'/1♦.
\ � ♦ � � / I i \ / � �� / I � \/ \ � ; / I i \ / � �� / I � \ / \ � \ / I i \ / � �� / I � \/ � � \ / I i \ / � ✓,� / I � \ / \ � ; / I i \ / � �� / I � \/ \ � \ / I i \ / � �� / I � \ / \ � ; / I i \ / � �� / I � \ / ; � ; / I i \ / � l � / I � \ / � � \ / I i \ / � �� / I � \/ \ � ; / I i \ / � �� / I � \ / ; � \ / I i \ / � �� / I � \/ \ � \ / I �
100
i LEGEND
CROSS SECTION LOCATION
GWA-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
V
ASH PORE WATER FLOWLAYER
GWA-22D
WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION
GWA-21BR WELL IN BEDROCK
V
SHALLOW ZONE FLOW LAYER GROUNDWATER
AB-35S
WELL IN ASH PORE WATER
WELL WATER LEVEL ELEVATION
DEEP ZONE FLOW LAYER GROUNDWATER
GENERALIZED WATER TABLE
WELL WATER LEVEL ELEVATION
GENERALIZED GROUNDWATER
BEDROCK FLOW LAYER GROUNDWATER
FLOW DIRECTION
WELL WATER LEVEL ELEVATION
GENERALIZED ASH PORE WATER
�►
FLOW DIRECTION
WATER LEVEL ELEVATION (NAVD 88)
GENERALIZED VERTICAL
(LABEL COLORING BY FLOW ZONE)
HYDRAULIC GRADIENT
WELL SCREEN
0
ASH
BREAKLINE
0
ASH PORE WATER
0
SAPROLITE
— — —
COMPLIANCE BOUNDARY
®
TRANSITION ZONE
0
BEDROCK
SURFACE WATER
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, AND OCTOBER 24, 2019 (AB-41SS, AB-41D, AB-44AP, AB-44SS, AB-44D,
GWA-28S, GWA-28D, GWA-28BR, GWA-29S, GWA-29D, GWA-29BR, GWA-30S, GWA-30D) REFERENCED TO NORTH AMERICAN VERTICAL DATUM
(NAVD) OF 1988.
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING AT
SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
200
150
100

z
O
H
w
J
W
700
650
600
550
C
(WEST)
COMPLIANCE BOUNDARY
RETIRED ASH BASIN
STRUCTURAL FILL ► RETIRED ASH BASIN ASH LANDFILL
M M t4 ii
QQ N fnG
_- - ---- FILL
--=_=-____=---�=--=--=-=--=-____- _------- -------- _______ a a
-=_��-- --=------ ------___-__ -====
s22. -------- -- ____ _________ ________
- 30_-_-=__ -'„=-_===�___-_____===-===_====-===_====-===_====-===-========-===
=-=---=_====_===_====_===_____ __---—�'==_______-___
------------------------------------
ASH PORE
�� TRANSITION ZONE I �� WATER 580.14'
SAPROLITE
628.77' 573.44'
SAPROLITE
\ AI'
/\I/I���i\li�`'�\/\I/��;�i\' \��I/I�;�i\I/1/�y;r_ _�,1`��-• 623.95'
/ 579
TR1 Imo
\\ ``- I .BEDROCK \ / -/ I X� -y , / I \ \ .>A
/ 1 624.12• — \ / \ / 1—
i�_ �' i
l
572.98'
, �/ \\/ 12.95'€
\ , .BEDROCK . / - \ \\, _
\
Z/\I
ASH
STORAGE ►
AREA
I �
ii m C
Q d
Q IQa a w ASH PORE
SAPROLITE 0 M M WATER
O O Ill m Ill m
Q Q Q Q FILL
---------------------- ---- --____ _
- -___--------------_____________ __
---__ -- --__-__� --- - —- - =ti- =]p__------
_`___-624.51' 626.1T == =-__— ASH
=-=-_
PORE WATER..-
- --- - -- =- = =---= ---=
SAPROLITE i
627.59'
I•►
I
I
I
I
I
I
I
I
I
I
I
I
J
m m
as
C'
(EAST)
700
650
600
CATAWBA RIVER
(LAKE WYLIE)
EL. 565'
(APPROX.)
550
ALLUVIUM
500
450
250
/
200
200
BEDROCK I /
\ BEDROCK; \
♦ � � / \I / 1 , ' / \ I " \ / \ I / 1 / � / \ I " \ / \ I / 1 � � / \ I " \ / \ I / 1 , � / \ I " \ / \ I / 1 / � / \ I " \ / \I / 1 , � / \I " \ / \ I / 1 , � / \ I " \ / \ I / 1 / � / \ I " \ / \I / 1 , � / \I " \ / \ I / 1 / � / \ I " \ / \ I /
� � / \ I " \ .
\ / 1 \ / 1 \ / 1 \ / 1 \ / 1 \ / 1 \ / 1 \ / \ \ / 1 \ / 1
\ / \
-150
LEGEND �,\_——\'/.—_'�
/I�\,il
il\/,\\�I`��/\I/1�'\/\I/\"\/\I/1�'\/\I/1`�\/\I/1�'\/\I/1`�\/\I/
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE � ASH PORE WATER FLOW LAYER \ / 1 / \
��\/\I/\"�
100
WATER LEVEL ELEVATION
WELL IN TRANSITION ZONE
GWA-22D `/' /_ - , \ \ �- , �/' - , \ \ \- , `/' - , \ ` �- , �/' - / \ \ \- , �/'
- , \ \ �
SHALLOW ZONE FLOW LAYER GROUNDWATER \ I \ \ / I ' \ /I ! \\� \ / 1 ' \ ; ` ,I ! \\� \ / I , \ ; \ /I ! \\� \ / 1 ' \
GWA-21BR WELL IN BEDROCK '-
, ! \�� \ / 1 \
WELL WATER LEVEL ELEVATION
AB-35S WELL IN ASH PORE WATER DEEP ZONE FLOW LAYER GROUNDWATER
CANAL ROAD GWA-5BRABANDONED WELL/ WELL WATER LEVEL ELEVATION
STEAM
GEOTECHNICAL BORING
V BEDROCK FLOW LAYER GROUNDWATER
NOTES
STATION
AL34 WATER SUPPLY WELL -
(DEPTH UNKNOWN)
WELL WATER LEVEL ELEVATION
1.
DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF
PLANTAL N RD.
C.
�
WATER LEVEL ELEVATION (NAVD 88)
1988
- GENERALIZED WATER TABLE
(LABEL COLORING BY FLOW ZONE)
2.
FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER
GENERALIZED GROUNDWATER
WELL SCREEN
LOGGING AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
ASHBASIN
FLOW DIRECTION
DISTINCT, CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF
(ASH STORAGE/
GENERALIZED ASH PORE WATER
��
FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS
STRUCTURAL FILL)
RETIRED
FLOW DIRECTION
BREAKLINE
DEPTH ARE CONCEPTUAL ONLY.
ASH BASIN
ASH LANDFILL
GENERALIZED VERTICAL
- - - - COMPLIANCE BOUNDARY
3.
ALL BOUNDARIES ARE APPROXIMATE.
HYDRAULIC GRADIENT
4.
CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
CATAWBA
RIVER
(LAKE WYLIE)
kCTIVE
H BASIN
NOTE:
CROSS SECTION C-C' IS LINEAR IN NATURE AND ALL k
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION — —
ASH
ASH PORE WATER
ALLUVIUM
FILL
SAPROLITE
TRANSITION ZONE
BEDROCK
SURFACE WATER
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
tDUKE
ENERGY
CAROLINAS
161P
synTerra
GRAPHIC SCALE
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
FIGURE 6-4
VERTICAL SCALE: 1"=80'
5X VERTICAL EXAGGERATION
GENERAL CROSS SECTION C-C'
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
CORRECTIVE ACTION PLAN UPDATE
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
ALLEN STEAM STATION
APPROVED BY: C. SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
BELMONT, NORTH CAROLINA
LAYOUT: XSECTCC(6-4)
www.synterracorp.com

(WEST) T) i _ COMPLIANCE BOUNDARY - D,
i (EAST)
i
ASH BASIN
i I I
m p to i PRIMARY POND 1 PRIMARY POND 2 PRIMARY POND 3
700 NNNN __ I
_ 700
to
C9(7C9C9 Q _ a _�• �� vava vmiumiuy�uyin tnC
Q _ J mm fV NNN NNNN N NN
a as aaaa mmmmm
650 ASH Q Q a �a a ASH Q Q J 650
I
--------------- ----- ------
----- _L---- -----------_
-- --------------------------------------
-- ------ ----------------------------
_____ = ==-===-==--= a ,
649.20' _-= ==_= _ ___ ASH PORE _= =-= --== ---=---===--�- �-- �- 638-68'=====_==_==-'===_== �==_--_----�__
-_-_ WATER _=========== a
__===_=-_ ----=�--==-===►_===_= --_= --_= --_= --_= ASH PORE WATER ____ ____ ____ ____ r? e? r� ch
637.50---===-= ==-= ==-= ==-= ==-= ==-===-===---=636.4T =__= �=_=_===_- --_- --_- --_- --_- --_- -_
600 �► _ -===-===-===-===-===-===-=== - - - -=_===_=_====_===_===__===_===_===__== a a a - 600
,i =__ - __ - -__--_____________ _ - CATAWBA RIVER
_-_ _-_ -- (2 W C9 t9 LAKE WYLIE
EL. 565'
SAPROLITE I SAPROLITE - ______== FILL ( )
636.39' �� SAPROLITE (APPROX.)
E573.74' 'Z-------_
550 j TRANSITION 550
ZONE
Z
O / / I / — I / / \� \ / — I / / I / — I \ / / I \ / —
\ \ � /1 \/\ /1 \ f�l� \/\ /1 \ /1 \/\ /1 \ \/\ / 1 \ TRANSITION
F- 500 642.31 \ I- 1'/ /� - 1''/ -� _ 1 �/ - /� - t'/ - /\ - 1'/ - /� - 1'/ / \ 1'/ - /� - 1'/ _ 1�/ /� - 1 ZONE 500
W
w I / I / I / I / \ I N\1
642.0I\ / 1 �.� \ /� / 1BEDROCK\ / 1 \ // \ /� / 1 \ /// 1 \ /� / 1 \// 1 �\ /� / 1 \ / \ � /�/
\ \ — BEDROCK 1 \--
450- BEDROCK`S /I /��/� �� / I / \/� / I / \/ �/ I / \/� / I 450
400 / I / 1, \ / I / \ \ / I / \ \ / I / \ \ x I / \ \ / x / \ 400
LUU
\ / I ♦ / - I \ / - I \ / - I \ / - I
♦ / - I \ / - I ♦ / - I
\ / - I ♦ / - I ♦ / I ♦ / - I \
/ - I ♦ / - `—Nu
BEDROCKS
150
/ \ � _ \ I � / \ � \ \ it � / \ � _ ♦ I � / \ / \ \ �I � / \ / - \ I ♦ / — \ I � / \ � - \ I � / \ � \ \ it � /
� _ ♦ I � / \ / \ \ �I � / \ / - \ I ♦ / — \ I � / \
/ \ I \ / —
150
BEDROCK
/ I / 0
.ARTESIAN \/
--;'CONDITIONS \ - \
100
LEGEND
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE
ASH PORE WATER FLOW LAYER
GWA-22D WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION
GWA-21BR WELL IN BEDROCK
SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
AB-35S WELL IN ASH PORE WATER
CANAL ROAD
DEEP ZONE FLOW LAYER GROUNDWATER
ALLEN ABANDONED WELL/
'GWA 5BR
WELL WATER LEVEL ELEVATION
STEAM BORING V
STATION
BEDROCK FLOW LAYER GROUNDWATER
WATER SUPPLNICALY
.`, AL34 WATER SUPPLY WELL -
WELL WATER LEVEL ELEVATION
NOTES
(DEPTH UNKNOWN)
PLANT AL N RD. v
GENERALIZED WATER TABLE 649.20
WATER LEVEL ELEVATION (NAVD 88)
(LABEL COLORING BY FLOW ZONE)
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
ARETIRED SH BASIN GENERALIZED GROUNDWATER
FLOW DIRECTION
WELL SCREEN
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING
AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
STRUCTURAL FlLL) RETIRED �� GENERALIZED ASH PORE WATER
FLOW DIRECTION
n
BREAKLINE
CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
ASH BASIN
ASH LANDFILL GENERALIZED VERTICAL _____
COMPLIANCE BOUNDARY
3. ALL BOUNDARIES ARE APPROXIMATE.
HYDRAULIC GRADIENT
CATAWBA
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
RIVER ASH
cn (LAKE WYLIE)
GRAPHIC SCALE
APO c0
= ASH PORE WATER
' DUKE
100 200 400
ACTIVE ALLUVIUM
ASH BASIN
ENERGY
HORIZONTAL SCALE: 1"=400'
VERTICAL SCALE: V = 80'
FIGURE 6-5
o ® FILL
5X VERTICAL EXAGGERATION
GENERAL CROSS SECTION D-D'
SAPROLITE
CAROLINAS
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
CORRECTIVE ACTION PLAN UPDATE
NOTE:
® TRANSITION ZONE
REVISED BY: D. KREFSKI DATE:12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
ALLEN STEAM STATION
ALL
CROSS SECTION ALONG LINTHE SECTION
LOCATIONS NOT ALONG THE CROSS SECTION ARE
CROSS
0 BEDROCK
APPROVED BY: C. SUTTELL DATE: 12/8/2019
gELMONT NORTH CAROLINA
PROJECTED ONTO THE CROSS SECTION.
SURFACE WATER
PROJECT MANAGER: 6C.- SUTTELL
LAYOUT: XSECTDD(6-5)
CROSS SECTION LOCATION --�-- PREDOMINANT BEDROCK
Tel'1'd
�
FRACTURE ORIENTATION
www.synterracorp.com

75o
E
(WEST)
L�
�
Q
I
G m
rn
I
700
G W
-
aaa N
N
FILL
Q Q
I
I
600
SAPIR OLITE
�l
I
I
I
I _
_ 550
Z
O
H
Q
J500
w
100
50
ASH
ISAPROLITE
COMPLIANCE BOUNDARY
ASH BASIN
m mGfJtA fN
r
N N N N N N
m m m m m m
ASH aaaaaa
ASH PORE WATER:====_===
--------------------------------
------------
----------------
----------------------
1634.80'
ASH WATER ELEVATION = 634
_
El
750
(EAST)
ACTIVE ASH
BASIN
—'
EAST DAM
700
J
0'
i0'
V>Gmm
tV
NNN
a¢aa
650
J
m CATAWBA
tACmm
RIVER
0000
( LAKE
WYLIE
m 00 00 m )
aaaa
EL. 565'
(APPROX.)
�► SAPROLITE ,595.25'. SAPROLITE
TRANSITION ZONE
639.42' TRANSITION ZONE �568.27'
640 37.'�
\ _
\ /1 \//\ /1 ���/1 \/\ /1 �\ �\/\ /1 ,<\/` r
/ � / _BEDROCK
BEDROCK /I� /I
I ` I /�_569.56' /\ ;
/ `
\/\I/A♦/_\/\I/1
�.\
LEGEND
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER
GWA-22D WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION
SHALLOW ZONE FLOW LAYER GROUNDWATER
GWA-21BR WELL IN BEDROCK
WELL WATER LEVEL ELEVATION
AB-35S WELL IN ASH PORE WATER
DEEP ZONE FLOW LAYER GROUNDWATER
GWA-5BR ABANDONED WELL/
WELL WATER LEVEL ELEVATION
N
M
GEOTECHNICAL BORING
V BEDROCK FLOW LAYER GROUNDWATER
0
500
50
100
50
DIN AL34 WATER SUPPLY WELL-
WELL WATER LEVEL ELEVATION
NOTES
(DEPTH UNKNOWN)
. GENERALIZED WATER TABLE
WATER LEVEL ELEVATION (NAVD 88)
649.20 (LABEL COLORING BY FLOW ZONE)
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
GENERALIZED GROUNDWATER
WELL SCREEN
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING
FLOW DIRECTION
AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT,
GENERALIZED ASH PORE WATER
CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO
#SIN FLOW DIRECTION
n BREAKLINE
NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
DRILL
GENERALIZED VERTICAL
— —°— — — COMPLIANCE BOUNDARY
3. ALL BOUNDARIES ARE APPROXIMATE.
HYDRAULIC GRADIENT
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
CATAWBA
RIVER
N *M°�'I:. (LAKE WYLIE) ASH
GRAPHIC SCALE
�p0 E E' 0 ASH PORE WATER
o ACTIVE
% DUKE
0 100 200 400
ASH BASIN o ALLUVIUM
ENERGY
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1"=80'
FIGURE 6-6
o ® FILL
5X VERTICAL EXAGGERATION
GENERAL CROSS SECTION E-E'
0 SAPROLITE
CAROLINAS
CORRECTIVE ACTION PLAN UPDATE
DRAWN BY: J. CHASTAIN DATE:7/26/2019
NOTE: ® TRANSITION ZONE
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
ALLEN STEAM STATION
CROSS SECTION E-E'IS LINEAR IN NATURE AND ALL BEDROCK
LOCATIONS NOT ALONG THE CROSS SECTION ARE
APPROVED BY: C. SUTTELL DATE:12/8/2019
gELMONT NORTH CAROLINA
PROJECTED ONTO THE CROSS SECTION. SURFACE WATERl0p
PROJECT MANAGER: SUTTELL
—
CROSS SECTION LOCATION --�— PREDOMINANT BEDROCK
SyC1TeYl'd
LAYOUT: XSECTEy6-6
FRACTURE ORIENTATION
www.synterracorp.com

x
of
IF
1lif
.�
�, ,,y///Ar
•_•� /-'tom—���
��- mc
•--\
_
PRE —DECANTING CONDITIONS / —
PRIMARYM
JPOND 1• . • . `
POST CLOSURE CONDITIONS
FOR CLOSURE —IN —PLACE
,
-• .
M
-• r -•
ZA
r
I�'T p hi.,.—\\`�`1�i `����1 �I� ��t�� � ; C„_�— % {• r�
:�'s"-.. �j E�Y+b�f�
a``\ 1
•} �F� PP4
• -'
�•"i '-�.
+•- �`` may^ _, .r•Y�+;.
`1�..
- ,
�..i�.+'
��y�':�"'
�;
•,
' r,..�,� -High . 80
�: -High . 80
..�- _ LOW : 0
:: : --
�`
LOW : 0
LEGEND NOTES: TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED MAY 29. 2015.
LASH THICKNESS ISOPACH SURFACES FROM UPDATEDGROUNDWATER FLOW
APPROXIMATE SATURATED ASH _ RETIRED ASH BASIN ASH LANDFILL ANDTRANSPORT MODELING REPORT FOR ALLEN STEAM STATION BELMONT. 4. ALL BOUNDARIES ARE APPROXIMATE.
THICKNESS ISOPACH (FEET) WASTE BOUNDARY NO (MURDOCH AND OTHERS, 2019)
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
(' DUKE
®
ENERGY
GRAPH IC SCALE
375 0 375 750
FIGURE 6-7
SATURATED ASH THICKNESS MAP FOR
2.THESATDRATEDASH OF ASHFROMTHEF&TMODSINGTME
ACTIVE ASH BASIN WASTE RETIRED ASH BASIN ASH LANDFILL gppROXIMATED BOTTOM OF ASH FROM THE F&T MODEL SIMULATION AND 6. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO
ON
CAROLINAS
(IN FEET)
PRE -DECANTING AND POST -CLOSURE CONDITIONS
DRAWN BY: C.WYATT DATE:10/10/2019
_ --
BOUNDARY ' COMPLIANCE BOUNDARY SIMULATED PRE -DECANTED HYDRAULIC HEADS, THE HYDRAULIC HEAD IN THE DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30, 2018.
SIMULATION ISABOVE THE TOP OFASH IN AREAS WHERE ASH PONDED WATER
CORRECTIVE ACTION PLAN UPDATE
RETIREDASH BASIN WASTE -- DORSFILLSBOUNDARIES OCCURS, AND IN THESE AREAS THE SATURATED ASH THICKNESS IS 7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
-- OVERESTIMATED. PLANE COORDINATE SYSTEM PIPS 3200(NAD83).
' BOUNDARY
REVISED BY: C.WYATT DATE:12/08/2019
CHECKED BY: L.DRAGO DATE:12/08/2019
ALLEN STEAM STATION
SITE FEATURE 3.THEWATEIRS OFTHE USHAVE NOT BEEN APPROVED BYTHE USARMV
APPROVED BY: L.DRAGO DATE:12/08/2019
BELMONT, NORTH CAROLINA
AT NALTHE IME OF THE
CORPSOFENGINEERSATTHE TIME THE MAP CREATION. THIS MAP IS
— • ASH BASIN COMPLIANCE BOUNDARY CORPPRELIMINARYOF ENGINEERS
DUKEENERGYCAROLINAS ATION ONLYCRE THE PRELIMINARY
synTerra
PROJECT MANAGER: C.SUTTELL
WE LANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC FOSTER
PROPERTY LINE WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE
www.synterracorp.com

ISample
ID
■
■
BGSB-BG-3 (4-!
CHROMIUM
I
ti
BGSB-BG-3 (24
■
BGSB-BG-3 (34
I' I■
■I
■
Sample ID(Depth)
I■
■ �
BG-2S (48.5-50)
■
■
�• �
Sample ID(Depth)
■ /L
BGSB-BG-2 (4-5)
• : ♦�
'
BGSB-BG-2 (14-15)
BGSB-BG-2 (24-25)
♦ ♦
Sam pie ID (De pth)
BG-2D (8.5-10)
♦
BG-2D (18-20)
BG-213 (48.5-50)
pth) Sample ID(Depth)
BG-3D (1-2.5)
BG-3D (13.5-15)
') BG-3D(18.5-20)
BG-3D (62-64)
i■
Sample ID(Depth)
GWA-27SB (10-11)
GWA-27SB (14-15)
CHROMIUM
IRON
SELENIUM
GWA-27SB (19-20)
♦�
CHROMIUM
■
■ IRON
SELENIUM
Sample ID(Depth)
GWA-8D (38.5-40)
GWA-8D (48.5-50)
Sample ID(Depth)
BGSB-GW-8 (4-5)
BGSB-GW-8 (14-15)
BGSB-GW-8 (24-25)
Sample ID(Depth)
SB-4 (25-26.5)
BORON
Sample ID(Depth)
SB-2 (18.5-20)
■
Sample ID(Depth)
1 SB-1 (3-5)
M
ARSENIC
WID(Depth)
Sample1.9-2)
�.-
Sample ID(Depth)
GWA-14D (0-2)
GWA-14D (10-12)
GWA-14D (18-20)
Sample ID(Depth)
CCR-26 (0.5-1)
CCR-26 (2-3)
Sample ID(Depth)
GWA-7 (0.5-1)
GWA-7 (2-3)
Sample ID(Depth) Sample ID(Depth)
GWA-29SB (10-11) CP-3SB (2-3)
CP-3SB (5-6)
Sample ID(Depth)
CP-1 SB (2-3)
S)`
Sample ID (De pth)
GWA-61D (28.5-30)
Sample ID(Depth)
GWA-30SB (2-3)
SELENIUM
GWA-30SB (5-6)
SELENIUM
Sample ID(Depth)
AB-34D (14-14)
ARSENIC
SELENIUM
ww Sample ID(Depth)
BGSB-GWA-23 (4-5)
BGSB-GWA-23 (14-15)
BGSB-GWA-23 (21-22)
k
Sample ID(Depth) •
GWA-9S (4-6)
0%
Sample ID(Depth)
GWA-5 (0.5-1)
GWA-5 (2-3)
\ Sam pie ID(Depth)
CP-4SB (4-5)
ARSENIC
THALLIUM
■
■ Sample ID(Depth)
/ CP-2SB (2-3)
♦ ARSENIC
IRON
(■ CP-2SB (5-6)
CHROMIUM
■
■ MANGANESE
■ THALLIUM
CP-2SB (8-9)
IRON
■ Sample ID(Depth)
GWA-5D (2-4)
• SELENIUM
■
• Sam p le l D(D. pt h)
AB-32S (13.5-15)
AB-32S (33.5-35)
COBALT
Sample ID (Depth)
AB-31
Sample ID(Depth)
L
AB-9(0.5-1)
AB-9 (2-3)
■ Sample ID(Depth)
AB-26D (13.5-15)
AB-26D (33.5-35)
Sample,
DID(�" 1
ABSample ID (Depth)
■
Sample ID(Depth)
■
BGSB-GWA-26 (4-5)
BGSB-GWA-26 (14-15)
BGSB-GWA-26 (24-25)
■•
■ � �'� � � • .
� �-
Sample ID (Depth) ' `
� • . � . � � � �
Sample ID(Depth)
BG-1D(1-2) Sample ID(Depth)
Sample ID(Depth)
BGSB-BG-1 (4-5)
BG-1 D (19-20.5) CCR 23 (0.5-1)
AB-11 (0.5-1)
BGSB-BG-1 (14-15)
BG-1D(45-50) CCR-23(2-3)
AB-11 (2-3)
BGSB-BG-1 (24-25)
BG-1D(56-57)
BORON
SELENIUM
AB-10 (0.5-1)
AB-10 (2-3)
lb
>v•j
■
■ Sample ID(Depth)
-- GWA-2(0.5-1)
♦ GWA-2 (1-2)
Sample ID(Depth)
GWA-1 (0.5-1)
GWA-1 (2-3)
Sample ID(Depth)
GWA-28SB (11-12)
SELENIUM
GWA-28SB (14-15)
SELENIUM
LEGEND
O BACKGROUND LOCATION WITH NO EXCEEDANCES
LOCATION WITH NO EXCEEDANCES
BACKGROUND LOCATION WITH ONE OR MORE
EXCEEDANCES
LOCATION WITH ONE OR MORE EXCEEDANCES
SITE FEATURE
ACTIVE ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
DORS FILLS BOUNDARIES
■ ■ DUKE ENERGY CAROLINAS PROPERTY LINE
' STREAM (AMEC NRTR 2015)
WETLAND (AMEC NRTR 2015)
1. DISCRETE SOIL SAMPLES EXCEED COMPARATIVE CRITERIA FOR CONSTITUENTS
LISTED UNDER THE SAMPLE ID. REFER TO TABLE 6-3 FOR A SUMMARY OF
UNSATURATED SOIL ANALYTICAL RESULTS.
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 BY AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC.
NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED
MAY 29, 2015.
4. ALL BOUNDARIES ARE APPROXIMATE
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11,
2017. AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
- COORDINATE SYSTEM FIPS 3200 (NAD83).
DUKE
aoo o
aoo soo
ENERGY
GRAPHIC SCALE IN FEET
CAROLINAS
DRAWN BY: C. WYATT
DATE: 10/03/2019
REVISED BY: C. WYATT
DATE: 12/18/2019
APPROVED BY: L. DRAGO
DATE: 12/18/2019
CHECKED BY: L. DRAGO
DATE: 12/18/2019
synTerra
PROJECT MANAGER: C. cUTTELL
FIGURE 6-8
UNSATURATED SOIL SAMPLE
LOCATIONS AND EXCEEDANCES
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

A..a
(NORTH)
LIVE COAL
PILE
I�� I
cI
`°'7I�
mit600-
V
V V
M
CP-35
550
V
CP-SS
g <50
CP_LS
GWA-SS
B <60
®
B 722
CCR-145
B 690
B <so
504 97B
ros 1a3a
SO4 18.9
B 32 ro5 138
soa 6s.z
504 16
TDS 116 CCR 115
B 178
504 33.9
ros 131
504 34.7
roS 109
COMPLIANCE BOUNDARY
Jjj
0CCR-175
A8-SOS504 43.8 8 « m5
504 4L4 504 1z5 7D5 202 504 19.4
roS 129 ros 285 ros 124
TDS 133 SAPROLITE cP�s SOa R3.a SAPROLITE
B 1d 7D5 2R GWA-4s CCR-14D CCR-I6D AB-10D
-4 1B 2027 B 604 B 50
CP-SD B 576 504 388 [[R-17D
500 \ ros SO4 147 SD4 412 B 1S20 504 283
B 709 - /\-- roS 2n 7D5 184 504 47.a ro5 147
CP-4D4� 253 GWA-40
504 24 _ I 491 GWA-SD CCR-110W B 6A CCR-35BR
/ CP�D _g 6s6 B _ soa 6a3 TRANSITION ZONE V14;1
1 ' / SO4 37.6 so4 81 TDS 170
450 roS 929 - - / \ B 1499 TDS In ros 182 \ / - AB-9D \ / -
i / I \ ` \ / soa 122 _ \ \ / I i i B ss1 / \ / I / \ \ GwA 3D I i
• 7D5 266 _ GWA-4BR _ \ / \ / - _ \ 4 49.1 \ / \ / - _ B 117 / - _ \ / \ / - \ \ / \ / -
\so4 10.9
197
129
400 BEDROCK'
\— `BEDROC � \\ /I / \\ /\\ /1 1 \\ \/ \\ /I \\ B ewA-0aRLm �\ �\\ /I \\ \ \ /I / \\ /\\'I / \\ .4TDS 149 �\ /1 \\ ♦ \ /I / \\ /\\ /I aB1agRL
Q 350 \ \ / \ I / 1 ` / — / \ I \ / \ / \ I / 1 ` / — / \ I \ cP-6BR rye \ /_ sa4 zcl , \ I \ / \ / �T�1 / \ I \` /_ \ / \ ` /_ \ / \ I / T� ' / \ I \ B a2D
s04 1 165
J— 1 /\� — — 1 /\—_ \ — 1 /\� — — 1 /\—_ 104 10 ✓ 1 /\-- \ / 1 /\-- \ — 1 / /`/ i 1 / /` — \ — 1 /'\/ i / /` — \ — 1 / /\� — 1 /�\-- \
lL rll�`/ii/I/\/��\/I—\/i� /I T0s z67 /\/i\/I/\/�i\/I—/'i'I/\/\/\/I—`/�i'I/\/♦/\/I—\/'i /I/\/��\/I—\/�i�,l�\/\/\/
300
\\ \ /\\//I / �\—c�\[�/I / \\ `\/,I `\ /\\ /I / \ //I / \\ /I / \\//\\\\ /I / \\' /`\//I \\ /\\
250 Gwa-sBRL
B 43 \ / \ / \I / 1 ` / —/ \I \ / \ / \I / 1 ` / —/ \I \ / \ / \I / 1 ` / — \I ♦ / \ / \I / 1 ` / —/ \I ♦ / \ /`I / 1 \
s04 55.4
/il\/I/\li \/I/\/i \/I/\li \/I/ /il\/I/\li/il\/I/\li/il\/I/\li
\ / _ \ / \ / — _ \ / \ / _ \ �/ — _ \ / \ / — \ / \ / — _ \ / \ / — \ / \ / — _ \ / \ / / \ / — _ \ / \
150
SO4 a
IN ,I _ \ _ \ / \ / — l i \ /I — \_ \ / \ / — l i \ /I — \ \ in / IN
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
(SOUTH)
— }ALLUVIUM — WMS
SAPROLITE
450
400
CCR-18D ' / \ 1 / -
'BEDROCK zss I' I \ /_ / I `
Q
-350Lu
\ / 1 \ \ / 1
Lu
300
250
\ \/ \ / - _\/ / - \ \/ \ / - _\/ /
­200
\/\I
150
100
-
NOTES:
_ 1 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS
OR
GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY
OF DATASET
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (Pg/L)
3. SULFATE (504) AND TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L)
LEGEND
NOTES
- NO DATA AVAILABLE
GWA 22S
WELL IN FILL/ALLUVIUM/SAPROLITE
V
SHALLOW ZONE FLOW LAYER GROUNDWATER
1.
DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH
AMERICAN VERTICAL DATUM (NAVD) OF 1988.
ANALYTICAL PARAMETER B 504 TDS
REPORTING UNITS Ng/L mg/L mg/L
WELL WATER LEVEL ELEVATION
2.
GROUNDWATER FLOW IS APPROXIMATELY WEST TO EAST, PERPENDICULAR TO THE CROSS
15A NCAC 02L STANDARD 700 250 500
GWA 22D
WELL IN TRANSITION ZONE
SECTION.
BACKGROUND THRESHOLD
GWA 21BR WELL IN BEDROCK
DEEP ZONE FLOW LAYER GROUNDWATER
3.
FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
BASED TELEVIEWER LOGGING AT BOREHOLES. AS
VALUE (SHALLOW ROW 50 5.4 154
WELL WATER LEVEL ELEVATION
ORIENTATIONS ON SITE SPECIFIC
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
BACKGROUND THRESHOLD
14.5 173
AB 35S
0
WELL IN ASH PORE WATER
BEDROCK FLOW LAYER GROUNDWATER
DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE
VALUE (DEEP FLOW ZONE)'50
CCR-11D
ABANDONED WELL/ GEOTECHNICAL
WELL WATER LEVEL ELEVATION
SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR ES NUMEROUS TO ILLUSTRATE AT THIS SCALE.
IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 50 7.3 221
BORING
4.
ALL BOUNDARIES ARE APPROXIMATE.
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
GENERALIZED WATER TABLE
WELL SCREEN
5.
CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
ALLUVIUM
MEAN BORON (B) CONCENTRATION (ug/L)
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
GRAPHIC SCALE
FIGURE 6-9a
0
FILL
MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
DUKE
0 112 225 450
,
GENERAL CROSS SECTION A-ASAPROLITEHORIZONTAL
40:1,
ENERGY
SCALE: 1" = 450'
VERTICALVERTICAL
CONSERVATIVE GROUP
®
TRANSITION ZONE
— — —
COMPLIANCE BOUNDARY
5X VERTICAL EXAGGERATION
EXAGGERATION
BEDROCK
BEDROCK
CAROLINAS
DRAWN BY: C. NEWELL DATE:9/13/2019
MEAN OF BORON, SULFATE AND TOTAL
— —
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
��
REVISED BY: D. KREFSKI DATE: 12/5/2019
CHECKED BY: L. DRAGO DATE: 12/5/2019
APPROVED BY: C. SUTTELL DATE: 12/5/2019
DISSOLVED SOLIDS (TDS)
CORRECTIVE ACTION PLAN UPDATE
PROJECT MANAGER: C. SUTTELL
ALLEN STEAM STATION
LAYOUT: XSECT—AA (6-9A)
synTerra
BELMONT, NORTH CAROLINA
www.synterracorp.com

A
(NORTH)
LIVE COAL
PILE -
I�
I I
soo �o
cy
�� I
fit
����
��MM
z
dd
��
��
U
U �c�
t,c�
am
-------
U
—
L)
—
—� ---
---
—L—
---
G_E
AB-95
CCR-145
cPas�
sr at
m
Gwnras
550 x
SAPROLITE
11
CCR 1fi6 —
sr
Y VV o000
UU
CCR-175
AR-1os ��
ccR uoa
_ y sr 1 zm
500 \ CP-SD [[R-1fiD CCR-76BR
/ / \ 868 CCR-17D
sr Sm
'T / I CP3DTTT
\ / \ /
\\_\ \I \ , \ / \I/ 1 \ / —/.\I \ /\ _ ass GwA-aD \I
_ / \ / 1 TRANSITION ZONE ccrt-1ao
450 / 1 , — 1 / — \ / / — GWA SD s 243 — AB-9D / — \ ' / ' \ // — / — \
�_ \ _ — \ \ _
GWA-SERA
t
\/ i \ / I �Il GWA-36RA /
400 _ \ / \ / — \ �I \ / \ — \ 'I \ / \ �I \ / \ / — \ 'I \ / \"C /I \ / /I \ / \ _ �I \ / \ — \ 'I \ / \ �I \
\ \ / — _ \ / — _ \ \ / BEDROCK'
\/
`BEDROCK\
a350/1,
>
J /i \/I�\/i/\/I� /� \/�/\ li\li \/�\/il\/li\li \/I it\/li\li/il\/li\li/il\/li\li/il\/li\li \/I�
W �L�rl� _ \il\ �-C�1\ /\ �I\ /\ � —\/I\ /\ /�\ I\ /\ / —\ /I\'\ / —\'I\ /\ � —\ /I\'\ / —\'I\ /\ � —\/I\ /\ il\ /\ / _ \�I\ /\ / —\'I\ /\ � —\ �I\'\ .
\/A
\//I �\T �/I / \\ �/ \\//I \\\\ /I / \ i\N//I \\ N /I / \\/i\\ ��\\ /I / \\' i\\//I \\\\ /I / \\�N�
I I
250
200 \\ \\\//I / \\ \ \\\//I / \\i�\/I i \\ \\\//I / \\i l \\//I / \i\\/ \ \\i\\//I / \\i\\/ I i \\i\\//I / \\i\\L}i \
150
RIVER
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
I CCR-1 I
SAPROLITE
_ A'
(SO I TH)
I GWA-2D I
450
400
'
7�
T
'- \ —
CCR-—
\ /
z
BEDROCK
—350 Q
W
300
-250
200
150
100
- — ' NOTES:
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR GEOMEANS
CALCULATED BASED ON CENTRAL TENDENCY OF DATASET USING DATA
RANGING FROM JANUARY 2018 TO JUNE 2019.
2. STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS
PER LITER
(Pg/L)
LEGEND
NOTES
GWA 22S
WELL IN FILL/ALLUVIUM/SAPROLITE
V
SHALLOW ZONE FLOW LAYER GROUNDWATER
1.
DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH
AMERICAN VERTICAL DATUM (NAVD) OF 1988.
GWA 22D
WELL IN TRANSITION ZONE
WELL WATER LEVEL ELEVATION
2.
GROUNDWATER FLOW IS APPROXIMATELY WEST TO EAST, PERPENDICULAR TO THE CROSS
SECTION.
GWA 21BR WELL IN BEDROCK
0
DEEP ZONE FLOW LAYER GROUNDWATER
3.
FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
WELL WATER LEVEL ELEVATION
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
AB 35S
WELL IN ASH PORE WATER
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
BEDROCK FLOW LAYER GROUNDWATER
DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE
CCR 11D
ABANDONED WELL/ GEOTECHNICAL
WELL WATER LEVEL ELEVATION
SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR T00 NUMEROUS TO ILLUSTRATEATTHIS SCALE.
BORING
IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
.
WELL SCREEN
4.
ALL BOUNDARIES ARE APPROXIMATE.
GENERALIZED WATER TABLE
5.
CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
0
ALLUVIUM
MEAN STRONTIUM CONCENTRATION (pg/L)
GRAPHIC SCALE
FILL
DUKE 0 112 225 450
COMPLIANCE BOUNDARY
'RTICALEXAGGERATION
SAPROLITE
HORIZONTAL SCALE: 1" = 450'
ENERGY
®
TRANSITION ZONE
5XRCAL VEI
0
BEDROCK
CAROLINAS DRAWN BY: C. NEWELL DATE:9/13/2019
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
REVISED BY:K DATE: 12/5/2019
CHECKED BY:: L.DATE: 12/5/2019
APPROVED BY:C. SUTTRAGO SUTTELL DATE:12/5/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT_AA (6-9B)
synTeird www.synterracorp.com
- NO DATA AVAILABLE
ANALYTICAL PARAMETER
Sr
REPORTING UNITS
Ug/L
15A NCAC 02L STANDARD
NE
BACKGROUND THRESHOLD
VALUE (SHALLOW FLOW
300
ZONQ)
BACKGROUND THRESHOLD
VALUE (DEEP FLOW ZONE)r
240
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW
181
'- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
FIGURE 6-9b
GENERAL CROSS SECTION A -A'
NON -CONSERVATIVE GROUP
MEAN OF STRONTIUM
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

A_
(NORTH)
Q 350
Lu
J
W
LIVE COAL
PILE
I/1
150/\I/1\//\I/1�/\/�I/1�/\/`�/1�/\/�I/1�/\/
10
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-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
GWA 22D
WELL IN TRANSITION ZONE
GWA-21BR
WELL IN BEDROCK
AB-35S
WELL IN ASH PORE WATER
CCR-11D
ABANDONED WELL/ GEOTECHNICAL
BORING
GENERALIZED WATER TABLE
ALLUVIUM
® FILL
0 SAPROLITE
® TRANSITION ZONE
BEDROCK
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
V DEEP ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
V BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
WELLSCREEN
MEAN COBALT (Co) CONCENTRATION (IJg/L)
�MEAN IRON (Fe) CONCENTRATION (pg/L)
MEAN MANGANESE CONCENTRATION (IJg/L)
— — — COMPLIANCE BOUNDARY
COMPLIANCE BOUNDARY
ra IMl i nn I
_ A'
(SOUTH)
/ IMn 1 38
I .
00
co
(L2
—
Fe
/
O
_ \
BEDROCK I / 1 \ / \ I / 1 ` / \ / \ I / 1
-350 Q
/
—-- — \ /.--
Lu
300
l \ /i l
l \\/ I \ l / l
250
-200
150
/
k /_/ ` / I / `/ / % NOTES:
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
— GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OFDATASET
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
NOTES
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH
AMERICAN VERTICAL DATUM (NAVD) OF 1988.
2. GROUNDWATER FLOW IS APPROXIMATELY WEST TO EAST, PERPENDICULAR TO THE CROSS
SECTION.
3. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
DISTINCT, CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE
SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE.
IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
DUKE
�I ENERGY
CAROLINAS
141P
synTena
GRAPHIC SCALE
0 112 225 450
HORIZONTAL SCALE: V = 450'
VERTICAL SCALE: 1" = 90'
5X VERTICAL EXAGGERATION
DRAWN BY: C. NEWELL DATE: 9/13/2019
REVISED BY: D. KREFSKI DATE: 12/5/2019
CHECKED BY: L. DRAGO DATE: 12/5/2019
APPROVED BY: C.SUTTELL DATE:12/5/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT_AA(6-9C)
www.synterracorp.com
2. COBALT (Co), IRON (Fe), AND MANGANESE (Mn) CONCENTRATIONS
ARE IN MICROGRAMS PER LITER (Hg/L)
- NO DATA AVAILABLE
ANALYTICALPARAMETER Co Fe Mn
REPORTING UNITS Hg/L Ng/L Ng/L
1SA NCAC 02L STANDARD J' 300 50
BACKGROUND THRESHOLD
VALUE (SHALLOW FLOW S.7 1,422 608
ZONE)'
BACKGROUND THRESHOLD 0.82 665 256
VALUE (DEEP FLOW ZONE)'
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 0.35 1,242 360
ZONE)'
- - INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMAC.) OF THE
1SA NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013.
'- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED
MARCH 2O11 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
FIGURE 6-9c
GENERAL CROSS SECTION A -A'
VARIABLE GROUP
MEAN OF COBALT, IRON AND MANGANESE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

(WEST) _ COMPLIANCE BOUNDARY EAST
STRUCTURAL STRUCTURAL
FILL FILL
QC ASH STORAGE BEND IN COAL PILE
700 a �y CROSS SECTION 700
J
fill650 ------
l IIII m mdQ�a cf(asnqa 1!�
q
�aapa�ma�ma
1III
650
--------------------
CATAWBA
�__ �__ �__ Q Q oo ao 00 0� om CD RIVER
_==========_===_===_===_=___ g
g
ccR BG-0ssASH PORE ---B 6 - WATER=---- ----------- _---- a Q a Q Q QAB-38S5-------_ AB-39s —e - o v�600 — soa lz -_ ---- _______ Gwa-a6s 600
--------------- _<so AB-385 �"�--`` B 119 _ - -==504 - -_ -
______________
TDS 29 soa z9 B 119 ros a zsl C9 C9 t9 c9 c9 c9 a a (LAKE
BG-02s SAPROLITE TQS lzo SO4 5.6 soa z — — — — — — — — U U WY565
B so f� TIM 16a SAPROLITE I — — — — _ APPROX.
SD4 1 AB-36D AB -MSS OCR -OM GWA-3o3 LP-ols cP-025 GWA- ( )
7Ds 137 0 5o AB -ID B 179D 6 296 B 361 B `� 8 <50 B <50
550 soa 1G6 B so4 37o soa 1310 soa 98 soa 3az soa vac sD4 1100 550
Tos 199 TRANSITION ZONE so4 33.1 TDs sn ros zsa TDs s63 TDs z6s6
_ TRANSITION ZONE — _ TDS zu I TDS M3' ms 1520
/ , — 1 ' /♦-- \ GW —A SAPROLITE
/ / / ♦ I \ / / / / CCR-BGOIDA \ / / / / ♦ / AB 388R / / I \ / / / / ♦ �, zes B «
Z B <50 ` / — — \ /I / ♦ , — — \ 'I \ , _ 0 6 ♦ / — ` / / — — \'I B <50 / — — \ 'I ` / \ , _ \ / / — — \ /I B 29 CP-02D — GWA-
\ //\I \ //\I /\� \ / \ //\I \ / 504 341 B so 7D5 1434
Q / / 504 <1 - / _ B 24.
so4 11 / 1 , , , TDS 871) ` 504 190
/ —\ \—1'/`—/ \ —\'/ —\ \i \'/`—/ \ —\'/ TDs ua \ —1'/ —\ \/ \/'. TDS 191 \ \ `—/—\ \`—/ e 3si \ so4 z \—, \ —\ 7DS 3&1
500 TDS 116 \ \— / / — / \ \— / / — / — / \ \— / \— / / — / \ i\— / / — / \ saa 3a Jy� — / / — 500
Q i I \_ /I / `� i ♦ /' \ _ /I / \♦ i \ /I — �— `' ` /I / \` \ \ /I \ _ / \\ i ♦ /' \_ /I / \♦ i \ _ /I / \\ i TOs 477
cP-01D% . ♦ ; 1D5 cwA-zsD — \_
i 4�1
/_— I ♦ / / I ♦ / — I ♦ / / I ♦ /_—/_— I ♦ / / I ♦ / — ♦ / / I ` /_— I 1 ♦ / I I ♦ / I \
\ /\, \,1,�\ \/\,1, \ /1 ,,\ \,1 �,� \ /1, \/\,' GW/430D SO4 \/\,, \/\ / ie 1�D \
\ / / 1 CP-03D
W'� /,/�\`//1/. GwA-zeD450 -\/\-1'/-'\-\'/- \-1'/-'� -\ /�\-\' -\ / \-1'`-ice'.\? /- -\' 'C-\� /- \� /- �ms 36ao _ - /� - 0� e so 450
\ / \ / ♦ / \ - k \ / - \ X- / - - 1 \ / \ - \ , \ - GWA-28BR soa 680 -
\ _ \ /� \\' i / I \ ' / \�' i / I \ ♦ /' - \♦' iI \ \ /I / \\' i / I \ i ♦ /' - \♦' i / I \ %` / \ l ♦ / I / \\� i \ /I / \`� �♦ / I / AB aaD ccR-o4DA I WA-06BRA I _ �i \ /I / \\' \s480 / TDS 1170
oa $jD)ROC B <SD ♦/\/ /1"��.'/ 1DS —/\I 0 ' .
SO4 1. Soo 17o 130
z11 TD5 431
\li \ I—\/i ♦ / I/ \/� `'y L1/ ♦ / I/ \/� ` I_\/i \ / I/ \/' ` I_\/i ♦ / I/ \/' ` I_\/i \ / 17 \/� ` I_\/i \ / I/ \/' ` I_\/i ♦ / I� \/'' I I/ \li ♦ I—\/i ♦ / I \l' 169dc \iki - sG4 1100
400`�/\�'�/1"\/\�'\/\I/1"\/\I'I/1"\/\�'�/1"\/\I'I/1"\/\I�I/1"\/\��\/\�/\"\/\ I/1`T\/\I 1��\/\�/1"\/\��\/\�/\"\/\I/I���i\/,ms` 3aro 400
\ \ �♦� /I / \ \ �`\ /I � \\ ♦ �♦� /I / \\i �\\/ I / \ � �\`11 / \ i l ♦\/ I / �`����/ \ i l \\/ I � �r./ I / \ i / ♦\/ 17 \`� �\`/ I / \ i l ♦\/ I / \ � �♦`/} / \ i l \\/ I / \`� �♦`/ I / \ i l ♦\/ 17 \`� �\ / I / \ i l ♦\/ I / 1`v,� Imo/ \ i l \\/ I / \`� �♦\/ I / \ i / ♦\/ I / \`i �\`/ I /
��/\�/1" \/\� \/�/\'/\"—/\I \/�/�/1"—/\I ♦/\/\�/1"—/\� \/\/\I/1"—/\I \/\/\�1"—/\I ♦/\/�%'il"—/\� \/\/\I/1"—/\I \/�/\I 1�;—/\�/ `�\/\'/1"—/\� \/_\/\I/ "—/\I ♦/_\/\I/1`.
350 \li \/I/\/�l♦/I/\li \/I/\/il♦/I/\li ♦/I�\/il♦/I/\li \/I/\/il♦/I/\li \/I/\/il♦/I/\li ♦/I�\/il♦/I/\li \/I/\/il♦/I/\li \/I/\/il♦/I�\lam GwA-OGBRI I_\/i ♦/I/\li ♦ \/i ♦/I/\li ♦ I 350
� /\I ♦/ i ./ / I \/ I ♦/ / I ♦/ I ./ / I ♦/ i ./ / I ./ I ♦/ / I ♦/ I ./ / I \/ i ./ / I ./ I ♦/ './ I \/ i ./ I ./ . I ♦.
200
/NOTES:
i\I / 1 ` _i\I. /♦ ;� i\I / 1 ` _i\I. /♦ ; i\I / \ ` _i\I. /\ ;� i\I / 1 ` _i\I. /♦ ;
i\I/ 1 ` _i;l. /\ ;� i\I/ 1 ` _i\I. /\ ; i\I / \ ` _i\I. /♦ ;� i\I/ 1 ` _i;l. /\ ; i\I 1 ` _i\I. /♦ `\ i\I / \ ` -i . ,
I 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF
150
\` �♦ // I / \♦ i �♦\/ 17 \` �♦ / I / \ i / ♦\/ I / \` i �\ / I / \ / `\/ I / \` i �♦ / I / \ / ♦�/ I / \`
DATASET USING DATA RANGING FROM JANUARY 2018 TO ]UNE 2019.
i �\ / I / \ l `\/ I / \` i �\ / I / \ l `\/ I / \` i �♦ / I / \ l ♦\/ I / \` i �\ / I / \ l `\/ I / \` i �\ / I / \ l ♦\/ I / \` i �♦ / I / \ l ♦\/
_ \ \ ♦ / - _ \ . / - \ \ / \ / - _ \ � / - ♦ \ / � / - _ \ � / - ♦ \ / � / -
_ \ � / - \ \ / \ / - _ \ � / - ♦ \ / � / - _ \ � / - ♦ \ / \ / - _ \ � / - \ \ / \ / - _ \ / - ♦ \ / � / - _ \ . / - \ \ / \ � 2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER
_
1(Pg/L)
- 1 /♦-- \ 1 ' /♦- \ - \ /`-- \ 1 ' /♦- \ - \ /`-- \ 1 ' /♦- \ - 1 /`-- \ 1 ' /♦- \
- \ /`-- \ 1 ' /♦- \ - \ /`-- \ 1 ' /♦- \ - \ /`-- \ 1 ' /♦- \ - 1 /`-- \ 1 ' /♦- \ - \ /`-- \ 1 ' /♦- \ - \ /`-- \ 1 ' /♦- 3. SULFATE (504) AND TOTAL DISSOLVED SOLIDS (TDS)
\ l i / I i \l i l ♦ / I / \l / I \l i l \ / I / \ l / I \l i l ♦ / I / \l / I \l i l ♦ / I / \
l / I \l i l ♦ / I / \l / I \l i l ♦ / I / \ l / I \l i l ♦ / I / \l / I \l i l ♦ / I / \ l / I \l i l ♦ / I / \l / I \l i l ♦ / CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L)
LEGEND
NOTES 4. MOST RECENT SAMPLE USED FOR AB4155/D, AB-44AP/SS/D,
GWA-28S/D/BR, GWA-29S/D/BR, AND GWA-30S/D.
CANAL ROAD - NO DATA AVAILABLE
ALLEP' GWA-22S WELL IN FIL ALLUVIUM SAPROLITE ASH PORE WATER FLOW LAYER
0 L/ / 1. DEPTH WATER GAUGED IN MONITORING WELLS MARCH 13, 2019, AND 2019
siEAnl
STATION GWA-22D WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION (AB-41SS, AB-41D, AB-44AP, AB-44SS, AB-44D, GWA-28S,GWA-28D, GWA-286R, GWA-29S, GWA-29D, ANALYTICAL PARAMETER B SO4 TDS
S, -2 R, GWA-R S,
v SHALLOW ZONE FLOW LAYER GROUNDWATER GWA-29BR, GWA-30S, GWA-30D) REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988. REPORTING UNITS Pg/L mg/L mg/L
8 GWA-21BR WELL IN BEDROCK
PLANT AL INRD.
WELL WATER LEVEL ELEVATION 2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE 15A NCAC 02L STANDARD 700 250 500
AB-35S WELL IN ASH PORE WATER
DEEP ZONE FLOW LAYER GROUNDWATER ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY BACKGROUND THRESHOLD 50 5.4 154
VALUE (SHALLOW FLOW
WELL WATER LEVEL ELEVATION ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT, CONSISTENT
RETIRED GENERALIZED WATER TABLE
FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER BACKGROUND THRESHOLD
50 14.5 173
ASH BASIN
_� GENERALIZED GROUNDWATER
BEDROCK FLOW LAYER GROUNDWATER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND VALUE (DEEP FLOW ZONE)`
LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY. BACKGROUND THRESHOLD
(ASH STORAGE/ FLOW DIRECTION
STRUCTURAL FILL) RETIRED
WELL WATER LEVEL ELEVATION VALUE (BEDROCK FLOW 50 7.3 221
GENERALIZED ASH PORE WATER
ecavn MEAN BORON B CONCENTRATION L 3. ALL BOUNDARIES ARE APPROXIMATE. ,
( ) (�' ) - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
ASH LANDFILL ��
FLOW DIRECTION
B 50 MEAN SULFATE (SO4) CONCENTRATION (mg/L) DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED
sot 11 MEAN TOTAL DISSOLVED SOLIDS (TDS) 4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS. MARCH 2O11 TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
0 ASH
TDS u6
cnrnwBA
CONCENTRATION (mg/L)
RIVER
m (LAKEWYLIE) 0 ASH PORE WATER
�OPp o
SAPROLITE
G RAPH IC SCALE
WELL SCREEN 0 100 200 400' FIGURE 6-10a
DUKE
$
' HORIZONTAL SCALE: 1"=400' GENERAL CROSS SECTION B-B'
4
P�Mg'Ct1pNG
ACTIVE ® TRANSITION ZONE
ASH BASIN
^ BREAKLINE
ENERGY VERTICALEVERTICAL CONSERVATIVE GROUP
0 BEDROCK
EXAGGERATION
- - - COMPLIANCE BOUNDARY 5X VERTICAL EXAGGERATION
CAROLINAS MEAN OF BORON, SULFATE AND TOTAL
o
DRAWN BY: J. CHASTAIN DATE:7/26/2019
SURFACE WATER
REVISED BY: D. KREFSKI DATE: 12/6/2019 DISSOLVED SOLIDS (TDS)
NOTE:
CROSSSECTION B-B'IS LINEAR IN NATUREANDALL _ _ _ PREDOMINANT BEDROCK
LOCATIONS NOT ALONG THE CROSS SECTION ARE FRACTURE ORIENTATION
CHECKED BY: L. DRAGO DATE: 12/6/2019
161P APPROVED BY: C. SU17ELL DATE: 12/6/2019 CORRECTIVE ACTION PLAN UPDATE
PROJECT MANAGER: C. SUTTELL
PROJECTED ONTO THE CROSS SECTION.
10A ALLEN STEAM STATION
LAYOUT:XSE/VC
CROSS SECTION LOCATION
synTerra y P BELMONT, NORTH CAROLINA
S rYa COY .COCTI

B-
(WEST)
ASH STORAGE
n n
COMPLIANCE BOUNDARY
STRUCTURAL STRUCTURAL
FILL FILL
BEND IN
CROSS SECTION
I
- B'
(EAST)
200
\/I!\/i/•NOTES•
CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
750
'EANSCALCULATED BASED ON CENTRAL TENDENCY OF
ET USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (Ug/L)
/!3.
MOST RECENT SAMPLE USED FOR AB-41SS/D, AB-44AP/SS/D,
it ii7100
GWA -28S /D/B R, GWA-29S /D/B R, AND GWA-30S/D .
LEGEND
NOTES - NO DATA AVAILABLE
CANAL ROAD 8�
ANALYTICAL PARAMETER Sr
ST GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE LAYER
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, AND OCTOBER 24, 2019 REPORTING UNITS Ng/L
STAT WATER LEVEL ELEVATION
GWA-22D WELL IN TRANSITION ZONE
(AB-41SS, AB-41D, AB-44AP, AB-44SS, AB-44D, GWA-28S, GWA-28D, GWA-28BR, GWA-29S, GWA-29D,
GWA-29BR, GWA-30S, GWA-30D) REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988. 15A NCAC 02L STANDARD NE
B GWA-21BR WELL IN BEDROCK SHALLOW ZONE FLOW LAYER GROUNDWATER
PLAN N RD.
BACKGROUND THRESHOLD
2 CTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZEDFRACTURE VALUE (SHALLOW FLOW 300
WELL WATER LEVEL ELEVATION
AB-35S WELL IN ASH PORE WATER
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLCONCEPTUALLY ZONE)
DEEP ZONE FLOW LAYER GROUNDWATER
ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT, CONSISTENT BACKGROUND THRESHOLD
FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER 240
GENERALIZED WATER TABLE
ASH BA31N WELL WATER LEVEL ELEVATION
OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND VALUE (DEEP FLOW ZONE)'
(ASH STORAGE/ -, GENERALIZED GROUNDWATER BEDROCK FLOW LAYER GROUNDWATER
LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY. BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 181
STRUCTURAL FILL) ASHTBASIN FLOW DIRECTION WELL WATER LEVEL ELEVATION
ASH LANDFILTED
L GENERALIZED ASH PORE WATER
3. ALL BOUNDARIES ARE APPROXIMATE. , BACKGROUND THRESHOLD VALUES WERE _ USING
COLL
e�aa
FLOW DIRECTION s, 8, MEAN STRONTIUM CONCENTRATION (pg/L)
DATA FROM BACKGROUND GROUNDWATER SAMPLES CTED
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS. MARCH 2O11 TO DECEMBER 2018 AS SUBMITTED IN ]UNE 2019.
.
7 ..• CATAWBA 0 ASH
RIVER
in (LAKE WYLIE) WELL SCREEN
GRAPHIC SCALE
o ASH PORE WATER
SAPROLITE
'DUKE 0 100 200 400'
FIGURE 6-10b
ACTIVE BREAKLINE
ASH BASIN ® TRANSITION ZONE
HORIZONTAL SCALE: 1"=400' GENERAL CROSS SECTION 6-6'
ENERGY VERTICAL SCALE: 1" = 80'
COMPLIANCE BOUNDARY
5XVERTICALEXAGGERATION NON -CONSERVATIVE GROUP
o BEDROCK
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:7/26/2019 MEAN OF STRONTIUM
SURFACE WATER
REVISED BY: D. KREFSKI DATE: 12/7/2019
NOTE:
CHECKED BY: L. DRAGO DATE: 12/7/2019 CORRECTIVE ACTION PLAN UPDATE
�.�
CROSS SECTION B-B' IS LINEAR IN NATURE AND ALL _ _ PREDOMINANT BEDROCK
LOCATIONS NOTALONG THE CROSSSECTION ARE FRACTURE ORIENTATION
� APPROVED BY: C. SUTTELL DATE: 12/7/2019
PROJECT MANAGER: C. SUTTELL ALLEN STEAM STATION
PROJECTED ONTO THE CROSS SECTION.
LAYOUT: BELMONT, NORTH CAROLINA
CROSS SECTION LOCATION
synTena wwwww.syntsynterracorp.com

B—
(WEST)
700
m m m
650
600
550
v
Z
O
Q 500
W
J
W
450
400
350
150
100
.' SAPROLITE
_ COMPLIANCE BOUNDARY
STRUCTURAL STRUCTURAL
FILL FILL
C to ASH STORAGE —III BEND IN
I CROSS SECTION
m m I I I I I
IN Q J vv MMMco M Gi aav ��Cvai��'4�
fAGmm
mmmm mmco mm ��aaaa
__-_--_ __- -__
______________ __ -__-_______ --__----------------
----- _
- - - - — __ -- —
-= ---------_--=__==--=-=-=-_-_=_=_ =_ = ______=
ASHPORE :__ -_- -__ _- ��_=_=- ��__-_ ��=_=
===a4AP
---
--
0
----------- WATER ------------ -------- - --
Co 1.4 �� AB-3855 AB_===__==_=_AB=395 _____ -Fm. _
Mn Fe 355 co 13 o Co 19 Mn
Mn 167 Mo 3 2 SAPROLITE c51.9
AB-36D AB- SS I Lo 2100
— B'
— I (EAST)
I
I
COAL PILE -I
I �
700
I ,
I ,
I ,
I ,
I ,
I ,
I ,
rn o 650
M C
' C? m CATAWBA
as
M G m N G m
ao 0o w rn w rn RIVER
L7 L7
it
c.i
M M 600
��
--- C9C9C9 C9C9C7 UU (LAKE
----- --V EL.565'
cP-o1s cP (APPROX.)
Co 514 Co 10.4 GWA-285
7 Fe 32n3 Fe 3243G. 22.4
Mn 5133 Mn 2960 Fe 386 550
TRANSITION ZONE I I I I I I I I I I I I I I II I�� Mn so 1� L 1� I I I 390 Mn I 4soo I aB asss zaz CP-02D Mn 4900 cP-ois
CCo 49.4
o al Ca 5�i0 Mn 23700 SAPROLITE Co z2 \```� GWM295 Fe 1061
AB-388R
BG02D - \ / ♦ / - \ / / - _ \ / / / / / / / - 58 Fe 75 Co 9.1
Co Q3 / / I ` / I \ / / I \ / I ♦ / I \ / I Co 0.3 \ / I \ / I -_ . Mn 393o0D Mn 1673 Mn 3090
\/\ /1, , AB-49D GWA-30D \/ \'/ 4aD
Fe 144 '/ - /\ - \'/ - \ - \'/ - �\ - 1'/ - \ - \'/ - n \ - \'/ - /\ - \'/ I Fe <50 - /� - \'/ - \ - \'/ - \ _ \ / - \ - \'/ Co 031 co Q9 CP-01D \ - \'/ 2n0
Mn 7 / \\/ I / \\� / \`/ I / \ / \\/ I / \\� / \♦/ I / \ / \\/ I / \\� \ / I / \ / \\/ I / \\� / \` \`/ I / \\� / \♦/ I / \ / \\�\� / \`/ I / \ / \` re 479 Fe 652 \ co 24 500
Mn 191 Mn 1300 - _ Fe c50
BG028RA-2 I ♦ / I ` / — I ♦ / I ` / — I ♦ / I ` / — I ♦ / I ` / — I ♦ / I ` / — ♦ / I ` / — I 1 / I ♦ / I \ /
cv-03D
Fe n l `\ lam-/� \ l\ V/ / i �`\`�-/S \ - 1 `/-i \ l- u- 1 �`.� inn 3270 1/ co s
\• �T�/ I/ \�� I-` / I/JAB I-\/Y \ /�� I-\/i \ / I/ \/� I-\/i \ / I/�/� 1� \/i \ /T'ai I-\/i \ / i \ Fe 3I90
Fe 473 Co Q3 Cum / _ -\ i - -\/ GWA-29D Mn 3223
�i ♦ / \ / \ / I \ / \ / ♦ / \ /
\\/\I/1``\/\I/1 \/\I/1-`/\/.�'/1 \//1\/LLI \/\I/1�^/j1/1, \/\'/1\\/\'/1 'Ci\'/1`/\/�%i'�G �/ I �' Mn 412 Fe ` Fe 9% 1\/1 \/\I
/ , �_ / , �_ �L , , / , �_ / �- / GWA-28BR /
\ - \'• i \ - \'/ - \ - \'/ - \ - \'/ - \ 1'/ � \ - \' \ 1'/ \�1-y� �\'/ - � - \'/ - C- / - .` - \'/ - \ 1'/ - \ - \'/ - 1 J � - \ - - \ / - \ �' � /.Fe 367 450
Min 610
_ /� \\ i ♦ /I \ / / I / `\ \ i /I \ _ /I / `\ i �l'I `_ i /I / \\ i ♦ /I \ _ /I / \\ i /I \_ % �/I / `\' /\_ /I / \\ /`♦ /I ' / \\� /\�.1� ,53
M
1`/\/\I/1,�\/\I/1`/\/�'/1,\/\'/1`/\/�/1CUA--837/\/\I/1`/\ Mn
\ 9
/♦--,
\ - \ � /♦-- \ � \ ' /♦-- \ - \ � /\-- \ � \ ' /\-- \ � 1 / /♦-- \ � \ ' /♦-- \ \ � /♦-- \ � 1 ' /♦-- \ - \ / /\-- \ � \ ' /♦-- \ � 1 / \ � \ ' /♦-- \ - \ / /\-- \ � \ ' /\-- \ \ / /♦-- \ � \ � � Fe zs3 - \ � \ ' /♦-- \ - 1 / /`-- \ � \ ' /\' - \ - 1 / /` - \ � \ ' /♦-- \ Fe loop
Mn 220
/1;' \'/ 1� 400
_ \\ � /\♦ /' / \ \ /`�//I � \\ � /\♦ /I / `\ � /`�//I � `` � �/\F11 / \\ � /`�//I �� � �/ \\ � /\�//I � \\".j/w//I / \\ � /\� /I � \` � /\\/�/ `\ � /`� /I � `\ � /\♦� / \\ � /`�//I � `\ � /\.//I / \\ � /`� /I � \\ � /\ //I / \\ � /\�//I � �\�/�l/`/ \\ � /\�//I � \\ � /\./ I / \\ � /\� /I � \\ � /\�//I /
/ \/\I/1�/ \/\I/1`/\/\I/1�/ \/\I/1`/ \/'`./1�/ �/\'/\`/\/\I/1�/ �/\I/1`/ \/\'/1�/ \/\'/1`/\/\� 1�/ �/\'/\`/ \/�/1�/ �/\I/\`/\/\'/1`/ /\' \ / \/\' \`/ /\I \ / - I `/_- ♦ / ' �/ \ '/1`/\ I/1\.
RL 350
GWA-068
a4
Mn
\ , NOTES:
\/'1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
-GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF
/DATASET USING DATA RANGING FROM JANUARY 2018 TO DUNE 2019.
\.
2. COBALT (Co), IRON (Fe), AND MANGANESE (Mn)
CONCENTRATIONS ARE IN MICROGRAMS PER LITER(N9/L)
3. MOST RECENT SAMPLE USED FOR AB-41SS/D, AB-44AP/SS/D,
\'GWA-28S/D/BR, GWA-29S/D/BR, AND GWA-30S/D.
NO DATA AVAILABLE
LEGENDNOTES ANALYTICAL PARAMETER Co Fe Mn
CANAL ROAD REPORTING UNITS
ALLEN 8 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, AND OCTOBER 24, 2019 (AB-41SS, Ng. ug/L ug/L
STEAM GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER AB-41D, AB-44AP, AB-44SS, AB-44D,GWA-2SS,GWA-28D, GWA-28BR, GWA-295, GWA-29D, GWA-296R, 15A NCAC 02L STANDARD 1- 300 so
STATION WATER LEVEL ELEVATION BACKGROUND THRESHOLD
GWA-22D WELL IN TRANSITION ZONE GWA-30S, GWA-30D) REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAND) OF 1988. VALUE (SHALLOW FLOW 1.7 1,422 608
SHALLOW ZONE FLOW LAYER GROUNDWATER
B PLANT AL IN RD. GWA-21BR WELL IN BEDROCK 2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE ORIENTATIONS ZONE)i
WELL WATER LEVEL ELEVATION BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, BACKGROUND THRESHOLD o.82 665 2s6
AB-35S WELL IN ASH PORE WATER DEEP ZONE FLOW LAYER GROUNDWATER TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE BACKGROUND THRESHHOLD
RETIRED _ GENERALIZED WATER TABLE WELL WATER LEVEL ELEVATION VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR T00 VALUE (BEDROCK FLOW 0.35 1,242 360
" ^^ NUMEROUS TO ILLUSTRATE AT THIS SCALE IN ADDITION THE DEPTH AND LENGTH OF FRACTURES VERSUS
NOTE:
CROSS SECTION B-B' IS LINEAR IN NATUREAND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
nmm.jj,�
0
®
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED ASH PORE WATER
FLOW DIRECTION
ASH
ASH PORE WATER
SAPROLITE
TRANSITION ZONE
BEDROCK
SURFACE WATER
� BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
GWA�RL MEAN COBALT (Co) CONCENTRATION (ug/L)
Fe mi ',, MEAN IRON (Fe) CONCENTRATION (Ng/L)
h* MEAN MANGANESE CONCENTRATION (ug/L)
WELL SCREEN
V^ BREAKLINE
- - - COMPLIANCE BOUNDARY
DEPTH ARE CONCEPTUAL ONLY.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
'-INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACs) OF
THE ISA NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013.
1-BACKGROUND THRESHOLD VALUES WERE CALCULATED USING
DATA FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED
MARCH zou To DecEMBER 2018 AS SUBMITTED IN DUNE 2019.
4'DUKE
ENERGY
CAROLINAS
GRAPHIC SCALE
0 100 200 400'
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1"=80'
CALTHIN EXAGGERATION
S:J.
FIGURE 6-10c
GENERAL CROSS SECTION B-B'
VARIABLE GROUP
MEANS OF COBALT, IRON AND MANGANESE
CORRECTIVE ACTION PLAN UPDATE
DRAWNBY:B : D. KR FSK DATE:7/26/2019
CHA
REVISED BY: D. KREFSKI DATE: 12/7/2019
CHECKED BY: L. DRAGO DATE: 12/7/2019
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
141,
APPROVED BY: C. SUTTELL DATE: 12/7/2019
PROJECT MANAGER: C. SUTTELL
ALLEN STEAM STATION
synTerYcl
LAYOUT: XSECT6-101
BELMONT, NORTH CAROLINA
www.synterracorp.com

L«
(WEST) o
O
Z
700 IL
O J J
650 � --__ 1 SAPROLITE
GWA-19S
600 B 1 <50
504 <1
TDS 47
550
C'
COMPLIANCE BOUNDARY (EAST)
RETIRED ASH BASIN — I
ASH
STORAGE STRUCTURAL FILL i� RETIRED ASH BASIN ASH LANDFILL I
AREA
700
Lo Ln
G mmmm
Q a a a N
J Q Q � � FILL �
—ASH PORE � � � --__ --- � I a m -___ en� N N I
M M WATER 650
M M
a a a a FILL
--— — — — — — — — — — ---- ----- -- ---- --ASH.-=-= ------- --
__----= -- = I
--------- ------- ------
-- --- --- -- -------�--- ------- -— --_ ------------------
�_- — - GGWA 15S -- ----- -----------AB-35S =AB 37S AB-36s =- __ASH PORE WATER_= _= B lms ______ __________ - --- �=_ =___ _--_--_--_---_-__--_--_____ ________-_______-___ ____-_-__ B 71 B 17s _ ____________________ _-___ __AB-3as — �q$[==-�__ __0= __________-------_---__-___ ___________________----------- a a a a 600
SO4 11.1 �� B <50 SO4 3.z --__ -_ --- ______ ____ ___ B 3ll - ___-"=- _ - _ ____ _ ________ �a CATAWBA RIVER
TDS 5s8 -------- SO4 2m - -----------------------------------`-----_-____-_- C9C9 C9 ii' (LAKEWYLIE)
SO4 2 TIM 195 EL.565' TDS 107 SAPROLITE TDS 485 ___ _______ _____-__= ____-=== ____-____-___-____-___-____-_ (APPROX.)
---------------------- ------
--------------- ------ -- I -------
TDS112---------------_
�_,L a6-3srws ASH PORE
SAPROLITE WATER AB 32S ILL 550
504 4.3 B <50
V v _ TIM 105 SAPROLITE
AB 37D AB-36o AB 35D �� s0a z ALLUVIUM
GWA-19D I J GWA-15D /I i TDs >3
B < 50 ` \ , _ SO4 3.8
\ B < 50 B < SO _ TDs 9s S0a 3 5 GwA-oss
Z 50 `� SO4 4.2 SO4 3.5 �� �/ SO4 2.6 /' /T 7DS TRANSITION ZONE �D soa `� 500
Q I \ TDS 155 \ �� ,I-\ \ I _\_� L1-i' \ \I —�� 0
TDS 153 _ Al \ \ \' ` / ``— / �—�'� 1� _ \ e 663 TIM n6
\ ' \ Al'
/ 1 `\ / \I / 1 \ BEDROCK L[T/-1= 1 \ / \ / \ \I / 1 / _ / 1 AB-340 - ,
/ AB-35BR / / / �-�- . \ SD4 3G5
B <50 , , \ ' /.-_ \ , 1 ' /\-- \ `I / TDS 162
i \\� /\ / �� / SO4 13 I' \/i l \ / '
J \/\/\I%1\' /\I \/ /\I `/- I \/ /\I \/- \/T/ I ♦/- I 7 / I \/- I \/ I \ \ SO4 2.8
7D5 98 \/- I \/ +� \/- I // I \/ GWA-05D
W 45 / ' \ / 1 , \ / 1�, \ / \ / \ / \ / 1 , \ / \ �\ / \ \ / 1 , \ / \ / `Y� \ \ / 1 , \ / \ / \ �� TDS \ / \ / \ / \�C \ / 1 T ` 1 , \ / \ / \ / �` / 1 , \ / \ / \1! \ / 1 / �\ a 656 / 450
\�4, TDS 171 GWA-osBRA
i\\/./——\�\\/./— \\/./—_\\/.BEDROCK'\/—\ B 736
/\II/1\'\/\II/1\'l/\II/1\'\/\II
\�\I
`/\/\l/L\\I/\"\/\I/1,\/\I/1\'\/\I/\,\/\I/1\'\/\I/\,\/\I/1\'\/\I/1,\/\I/1\'K%\I/1,\/\I/1\'\/\I/\,\/\I/1\'\/\I/1,\/\I/1\'\/�LLI♦/�/\I/1\'\/\I/1,�\/\I/1\'\/\I/ GWA-DSBRL /\ 250
a 43 �-
I
200
200
BEDROCK I
\
/ 1
-
I
NOTES:
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR GEOMEANS \
CALCULATED BASED ON CENTRAL TENDENCY OF DATASET USING DATA
I \/� ,I \/i \ / I / \li •I \/i \ / I / \li .I \/i \ / I / \li ,I \/i \ /
I / \li •I \/i \ / I / \li •I \/i \ / I \/�
RANGING FROM JANUARY 2018 TO JUNE 2019.
LEGEND
%\I:.\%�:\I/1;'�:\I:.\%�:\I/ ;'�:\I:.\/\ 100
2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L) ' \ ' '
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE
ASH PORE WATER FLOW LAYER
GWA-22D WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION
3. SULFATE SO4 AND TOTAL DISSOLVED SOLIDS(TDS)
( )
CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L) NOTES
AL ROAD
GWA-21BR WELL IN BEDROCK
SHALLOW ZONE FLOW LAYER GROUNDWATER
- NO DATA AVAILABLE
AB-35S WELL IN ASH PORE WATER
0
WELL WATER LEVEL ELEVATION
ANALYTICAL PARAMETER B SO4 TDS 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO NORTH
STATI
DEEP ZONE FLOW LAYER GROUNDWATER
AMERICAN VERTICAL DATUM (NAVD) OF 1988.
REPORTING UNITS
GWA-5BR ABANDONED WELL/
GEOTECHNICAL BORING
WELL WATER LEVEL ELEVATION
700pg/L 250mg/500
i5A NCAC 02L STANDARD 700 250 500 2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
PLANT AL N RD.
C.
BEDROCK FLOW LAYER GROUNDWATER
BACKGROUND THRESHOLD ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
50 5.4
c AL34 WATER SUPPLY WELL -
WELL WATER LEVEL ELEVATION
VALUE (SHALLOW FLOW 154 CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
RETIRED (DEPTH UNKNOWN)
ASH BASIN
MEAN BORON (B) CONCENTRATION (ug/L)
BACKGROUND THRESHOLD DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT
50 14.5 173 THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS
VALUE (DEEP FLOW ZONE)' SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL
_T_ _ GENERALIZED WATER TABLE
(ASH STORAGE/
as MEAN SULFATE (SO4) CONCENTRATION (mg/L)
BACKGROUND THRESHOLD
STRUCTURAL FILL) RETIRED ono..b,. GENERALIZED GROUNDWATER
ASH BASIN
s� as MEAN TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATION (mg/L)
50 7.3 221 ONLY.
VALUE (BEDROCK FLOW
ASH LANDFILL FLOW DIRECTION
' -BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA 3. ALL BOUNDARIES ARE APPROXIMATE.
GENERALIZED ASH PORE WATER
WELL SCREEN
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
FLOW DIRECTION
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019. 4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
CATAWBA ASH
RIVER
BREAKLINE
GRAPHIC SCALE
m (LAKEWYLIE)
0 0 ASH PORE WATER
�'
BOUNDARY
0 100 200 400 FIGURE 6-11a
DUKE
o ALLUVIUM
COMPLIANCE
' HORIZONTAL SCALE: 1"=400' GENERAL CROSS SECTION C-C'
ACTIVE
� ASH BASIN ® FILL
VC ENERGY VERTICALVERTICAL EXAGGERATION CONSERVATIVE GROUP
5X VERTICAL EXAGGERATION
g SAPROLITE
CAROLINAS DRAWN BY: J. CHASTAIN DATE:7/26/2019 MEAN OF BORON, SULFATE AND TOTAL
® TRANSITION ZONE
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019 DISSOLVED SOLIDS (TDS)
NOTE:
BEDROCK
APPROVED BY: C.SU17ELL DATE: 12/8/2019 CORRECTIVE ACTION PLAN UPDATE
61P
CROSS SECTION ALONG IS LINEAR IN NATURE AND ALL
LOCATIONS ONTOTHEC OSSSECSSECTIONARE SURFACE WATER
PROJECTED ONTO THE CROSS SECTION.
PROJECT MANAGER: C. SU17ELL
LAYOUT: XSECT (6-11A) ALLEN STEAM STATION
CROSS SECTION LOCATION - - PREDOMINANT BEDROCK
WnTerra www.s nterracor com BELMONT, NORTH CAROLINA
Y p
FRACTURE ORIENTATION

L«
(WEST) o
a
O
z
700-1 a
� 2
F
650
CWA-195
600 Sr 123
II
550
SAPROLITE
Q Q —ASH PORE
WATER
- - AB-376
Sr 143
SAPROLITE
ASH
STORAGE
AREA
ii I m C
Q a FILL y ==71=-ASH_-
__�--.-A- SH_PORE WATER_____ -____
COMPLIANCE BOUNDARY
RETIRED
ASH BASIN
STRUCTURAL FILL RETIRED ASH BASIN ASH LANDFILL
to
[Q
N
y0
FILL
M
M
fq
G
-- -=---=--====--=
--===------- __-___-___�___-____--__--
a
_--__________________
_'_ _ _
—___
_—_—_ _ _ ___________________________________ _ _ _ ________ ___
AB-355
sr
AB-35Pws
----------------------_- ------
ASH PORE -
sr laa
WATER
SAPROLITE
I AB-325
C'
(EAST)
I
I
I
I
I
I
I
I
I
I
I
9�
00 GO
� N
as
CATAWBA RIVER
(=
(LAKE WYLIE)
EL. 565'
-(APPROX.)
700
650
600
550
III III II AB-37D Sr 119
11 SAPROLITE Sr 1
/ \_— 1 / ; 146 a3
�fia�t^'t/ n AB-35D ALLUVIUM
y^� A 191 I / 1 ` / / \ I \ / ` \ \ I / \ ` ' / \ I `� L/ \ ` / \ / ♦ / s - AB-3aD AB-3zD
sr 2n
Z 5U �I � \�_�lI \ \�l/ 5UUi�% tT �\ mi\/ l i \\i \ / L
1`TRANSITION
\IT/IO\N ZONE\
BEDRCK it\/1R/OH _• ,
I'\/I�\/il\/I�\• .ail\/I�\li \/I�\il / i li \/I�\il /�� /f \il / iIN
J%/1`/��\I/1`/�\Y\ � sr 225 \/1`//\
/ _ I I /
W45 /`-1'/-\i_�\�\-'-\k\-�'y`�\�G1�/`-\-\'/-\/\ /\-\\1'/�\"\ice/�-\-�\'/ GWA-oseRA \\\'/-\ 450
- / I / \ i l \`y `� �\ / I / \ i%�i ♦ / I / \ �/ 50 / \ / �/ , \
.. BEDROCK -
\/\/\I/1�/�/\I/1`/\/\I/1�/�/\�1\,—
\ 1 -7L\�\I/1`/
200 1 i 200
BEDROCK;\/\I/1"�/\I/1`/\/\I/1`/�/\I/1\/\/\I/
\/
I \lei./-l\i\/-\ \'\/-l\�./-\ \'./-l\�./-\ \'\/-l\i\/-\ \'./-l\�./-\ \'./-l\i\/-\ \'\/-l\i\/-\ \'./-l\�./-\ \'./-l\i\/-\ \'./-l\�./-\ \'• _l\��/_\
150
1 i � i l \\/ I / \ i l \\/ I � \` � / \\/ I / \ i l \\/ I � \` � l \\/ I / \ i l \\/ I � \` � / \\/ I / \ i l \\/ I � \` � l \\/ I / \ i l \\/ I � \` � / \\/ I / \ i l \\/ I � \` � l �\/ I / \, i l \\/ I � \` � l �\/ I / \_ i l \\/ I � \` � l �\_ / I / \ i l \\/ I � \` � l \\/ I / \ i l \\/ I � \` � l \\/ I / \ i l `�/ I , \♦
NOTES:
— \ / /\ , — \ \ , /\ _ \ 1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR GEOMEANS
CALCULATED BASED ON CENTRAL TENDENCY OF DATASET USING DATA
LEGEND RANGING FROM JANUARY 2018 TO JUNE 2019. \ / \ I / 1 ` \ / \ I / 1 \ / \ I / 1 ` \ / \ I / \ / \ I / 1 ` ' \ 100
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER 2• STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS PER LITER
GWA-22D WELL IN TRANSITION ZONE WATER LEVEL ELEVATION - NO DATA AVAILABLE—
CANALROAD GWA-21BR WELL IN BEDROCK SHALLOW ZONE FLOW LAYER GROUNDWATER ANALYTICAL PARAMETER Sr NOTES
�^ WELL WATER LEVEL ELEVATION
NOTE:
CROSS SECTION C-CIS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION -
AB-35
WELL IN ASH PORE WATER
GWA-56R
ABANDONED WELL/
GEOTECHNICAL BORING
AL34
WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED ASH PORE WATER
FLOW DIRECTION
ASH
0
ASH PORE WATER
ALLUVIUM
®
FILL
SAPROLITE
®
TRANSITION ZONE
BEDROCK
SURFACE WATER
—
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
DEEP ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
V
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
sr 191
MEAN STRONTIUM CONCENTRATION (pg/L)
WELL SCREEN
✓�
BREAKLINE
— — — —
COMPLIANCE BOUNDARY
REPORTING UNITS Pg/L
15A NCAC 02L STANDARD NE
BACKGROUND THRESHOLD
VALUE (SHALLOW FLOW 300
ZONE)'
BACKGROUND THRESHOLD 240
VALUE (DEEP FLOW ZONE)'
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 181
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
4 'DUKE
ENERGY
CAROLINAS
161P
synTena
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO
NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS AT
THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT
THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE
CONCEPTUAL ONLY.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
GRAPHIC SCALE
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
APPROVED BY: C. SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT(6-11B)
www.synterracorp.com
FIGURE 6-11 b
GENERAL CROSS SECTION C-C'
NON -CONSERVATIVE GROUP
MEAN OF STRONTIUM
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

C C'
(WEST) COMPLIANCE BOUNDARY (EAST)
Q RETIRED ASH BASIN I
ASH
STORAGE �y� STRUCTURAL FILL RETIRED ASH BASIN ASH LANDFILL —,
Z AREA
700 a 700
_ u�z uNi ua,
� M t�
3� ° a a '�� a 00aa
Q QQ �n ASH PORE to r
-__-_--__-
- ---F-IL-_L
650 _ SAPROLITE WATER _ m--
Q
Q�amQ
mQI
650
FILL
------ ------- — AS _ =
W- _-_-_= _= = == _______-___
A-196 5
Co 0.1 AB_ L?AB-3/s �ASH ORWATER: Co a3_ =__�---------
Ca ll_---------------------------__-=-
600 600
_z-== = LCRIVER
YLIE)
1.9
SAPROLITE __-�___-_____--_EL.565'
(APPROX.)
Fe 1354 Fe CATAWBA
wAiD Mn 1127
Fe
Mn 4 Co 0.6 _ _—_L_______
ASH PORE
Fe 292 550
AB-36D
550 I � ca <a1 _► Mn 101 SAPROLITE WATER � 32s ILL
TRAINSITION ZONE ill/ ` AB-37D Fe 133 �1 SAPROLITE Co 17.1
co �0.1 . /l i \/ Mn s CAB-3sD al 39240
Mn 6014 Fe ALLUVIUM
Co
\_ 34D GWA-OSS
/y \ /\
5U Mn <s \ =1 / — \ 1 A/�—, \ — \ ' /! \\ \ __ - \ — \ ' /�— / \ — Mn <5 Co a2 AB-32D Co 213 500
Z / \ / I / \ i �% 7 \ i ' h / I / \ \/ \ �"lT — / \i i \ i / \ / / \ TRANSITION ZONE Fe zFn co 0.3 Fe lzso
\ ��_ I _ \ , \ _ \ I \ / \ I \ i \ I \ L-_ �i �I / \ i _ _ / Fe z54
O \/ /\ / I /\/ /\I /v/�\/�/- /\\�-\ \\/�/- _/ \�— _�\\ Mn 6 ���� /\\/\ Mn 5804
_ I \ /_ I I \ BEDROCK — I \ / I �x T— y / I I \
/ \ , yt \ /) / \ / 1 / .�/J -7 1 , \ /� \ / ♦ / \ / -► • , �'/� / 1 / \ /�F , \ / \ • / 1 \ / 1 , AB-3sBR / / / , , , y , \: / 1 / J8
/ l i \ I \ i l / / /�G \/ I\ i t / / l i \/ I\ l / 7 4 i \/ I \ i l / i t I' \/ I\ i t / �` l i \/ I \, / I\ i l / i l i \/ I\ i t / r l / 7 i \/ I\ i l \.. 6wA -05D
0-3
Lu
45/�\%\i/ Fe 242
la/7;
450W-\
L\ I / \ 6wA-058RA
_ \ / .BEDROCK/ / - \
/- I \ �/ \I \ /- I \ / / \I \ /- I \ / / \I Co 0.1
/1, \/\/1/ \ /1, \/\/1/ \ /1, \/\/\, C /1/ \/\/1/ \ /1, \/\/1/ \ /1/ \/\ .1, \1 Fe 134
Mn 87
200 I / \\i �\ / I / \ i l \\/ 17 \\i �\ / I / \ i / \\/ I \\i �\ / I / \ i l \\/ I \\i �\ / I / \ i l \\/ I \\i �\ / I / \ i / \\/ I \\i �\ / I / \ i l \\/ 17 \\i �\ / I / \ i l \\/ I \\i �\ / I / \ i l \\/ I \\i �\ / I / \ i l \\/ 17 \\i �\ / I / \ i / \ / I \\i �\ / I / \ i l \\/ I \\ 200
\ 6EDROCKI/1♦/\/ '/1\/ /\'/1\/\/ '/1\/ /\'/1\/\/�I/1\/ /\I/\\/\/ '/1\/ /\'/1\/\/\I/1\/I\/\BEDROCK'-\/\
♦ /�/\I/1// \/\I/1\ / \/\'/1, �\/\'/1\ /\/\'/1, �\/\'/1\ / \/\I/1/�\/\I/\\ /\/\'/1, �\/\'/1\ / \/\I/1/ �\/\I/1\ / \/\I/1� �\/\I/1\ / \/\'/1, �\/\'/1\ /\/\I/1/ �\/\I/1\ / \/\I/1, �\/\'/1\ /\/\'/ / �\/\'/1\ / \
/ / / / / / / / / / / _ / - 150
NOTES: / \ i l \\/ 17 \\ �\\/ I / \ i l \\/ I \\ �\\/ I /_ \ i l `\/ I , \♦
♦//\I/1\/\/\I/\\/\/\'/)\/\/\I/1\/\/\'/)\/\/\I/\\/\/\I/\\/\/\I/\\/\/\'/)\/\/\'/1\/\/\I/\\�\/\I/\\/\/\I1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR GEOMEANS
�- CALCULATED BASED ON CENTRAL TENDENCY OF DATASET USING DATA
-\.7\l/\/ii-\_l\/--/\.7/ii-\_l\/-\.7/ii-1_l�\/-/\.i\l/\/_ii-\_l"\_/-\.7\I. RANGING FROM JANUARY 2018 TO JUNE 2019.
LEGEND 2. COBALT (Co), IRON (Fe), AND MANGANESE (Mn) CONCENTRATIONS ARE • /_ \ \ I j ; ♦ / \ I / 1 \ / \ \ I ; \ , \ I / \ / \' / \ / 100
IN MICROGRAMS PER LITER (pg/L)
GWA-22S WELL IN FILVALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER - NO DATA AVAILABLE
GWA-22D WELL IN TRANSITION ZONE WATER LEVEL ELEVATION ANALYTICAL PARAMETER Co Fe Mn
WELL IN BEDROCK
SHALLOW ZONE FLOW LAYER GROUNDWATER REPORTING UNITS pg/L pg/L pg/L NOTES
GWA-21BR
L WELL WATER LEVEL ELEVATION SSA NCAC 02L STANDARD 1* 300 so
srEA AB-35S WELL IN ASH PORE WATER BACKGROUND THRESHOLD 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO
srnrlo 0 DEEP ZONE FLOW LAYER GROUNDWATER
VALUE (SHALLOW FLOW 57 1 422 608 NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
RIVER
NOTE:
CROSS SECTION C-C' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
GWA-5BR
ABANDONED WELL/
GEOTECHNICAL BORING
AL34
WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED ASH PORE WATER
FLOW DIRECTION
0
ASH
0
ASH PORE WATER
0
ALLUVIUM
®
FILL
0
SAPROLITE
®
TRANSITION ZONE
0
BEDROCK
SURFACE WATER
—
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
WELL WATER LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
D MEAN COBALT (Co) CONCENTRATION (ug/L)
MEAN IRON (Fe) CONCENTRATION (ug/L)
s= MEAN MANGANESE CONCENTRATION (ug/L)
WELL SCREEN
BREAKLINE
— — — — COMPLIANCE BOUNDARY
ZONE)'
BACKGROUND THRESHOLD 0.82 665 256
VALUE (DEEP FLOW ZONE)i
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 0.35 1,242 360
- -INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACS) OFTHE 15A
NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013.
'- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
'DUKE
n ENERGY
CAROLI NAS
161P
synTerra
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
DISTINCT, CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT
THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS
SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL
ONLY.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
GRAPHIC SCALE
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY:L.DRAGO DATE:12/8/2019
APPROVED BY: C. SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT(6-11C)
www.synterracorp.com
FIGURE 6-11c
GENERAL CROSS SECTION C-C'
VARIABLE GROUP
MEAN OF COBALT, IRON AND MANGANESE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

(WWD T) _ COMPLIANCE BOUNDARY
ASH BASIN
m p to i PRIMARY POND 1 PRIMARY POND 2 — — PRIMARY POND 3
700 NNNN
N 0U) Vi
C9t7t9C9 Q Q _ �cl) vava mmt/�tAV� rnO
Q aaaa
650 Q a ASH Q Q Q Q Q ASH Q Q
---=-=--=-=-=-=-===-===-===-===-===-=----- =_ _ _ _ _--_--- ---- J- - __ _ -_---_ =-==a=-=_-_---
-- ----- _L---- ------ —----------- ----
_--------------_---------------------- -
GWA-zs AB-i3s _ = __ �_- - _�_-= ASH PORE -=-=�=-=�=-=�=-=�=-- - __-_-____-___-_-__ AB - - -- -___ _- === =__ �__ �__ �__ �_
_ == =__ ==_===================_=========== - ============
B <so B so _ -- WATER -_-_ _ ___________ ____ ____ ____ ____ ___ B lz3a = - --"=__=�=_=�=_=�=_=
==_== ASH PORE
T06 31 •�► TD5 ffi _____________'_________________________________ TD5 220---`----------------_-`_-_-`_-_-________= a
_r __� - - - - - - - _______
600 AB-24S==_==_____________ - - - - __ - �__ ___-
8 773 ------------ AB-zssL
SAPROLITE SAPROLITE _ == FILL
I AB-13D AB-245L s04 B 1065 -
B <so B 631 s04 35.3 SAPROLITE
SO4 <1 504 18.3 Tns 183
AB-265
550 j TDs 1zz TRANSITION Tim1� �► Aa zsss B 1ow
ZONE 0 1z13 s04 65.8
\ / 504 272 TO6 1�
TDS 1sz
Z
8 50 \ / — _ AB-25BRU
;TRANSITION
Q500 \ I_ 1 �/ /� - 1'v -�/� _ 1 �/ - /� - t'/ - /\ - 1'/ - /� - 1' DS , - /� _ 1' -
/ GWA-21DAAB-24BR
soAs B 25BRUIDBLLo 52BEDR
6w. a /I \\BE/D—
R\ O\/ CK\-
1 AB-26D
1BR
450 A-2\ —/ //\I \ /\ / \/ \I /` / — f\I \ / \/ \I /\ / — / \I \ / / \I / ` /_ •/— /\I \ / \/ \I 39z.GWBEDROCK
so4 s
176
400
200
♦ / I \ / — ` ' I \ / \ _ I
\ / — \ ' I \ 7 \ — I \ / — \ ' I \ 7
\ — I
\ / — \ ' I \ 7
\ _ I \ / — \ ' I \ r
\ — I \ / — \ ' I \ 7 \
BEDROCK\
150
i l \\/ BEDROCK(\
.4. \/
lool
LEGEND
GWA-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
GWA-22D
WELL IN TRANSITION ZONE
GWA-21BR WELL IN BEDROCK
AB-35S
WELL IN ASH PORE WATER
GWA-5BR
ABANDONED WELL/
GEOTECHNICAL BORING
AL34
WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
own.*.
GENERALIZED GROUNDWATER
FLOW DIRECTION
mm,..o,
GENERALIZED ASH PORE WATER
FLOW DIRECTION
ASH
(LAKE WYLIE)
JPD
0 ASH PORE WATER
0
ACTIVE
0 ALLUVIUM
0
ASH BASIN
® FILL
0
0 SAPROLITE
NOTE:
® TRANSITION ZONE
CROSS SECTION D-D' IS LINEAR IN NATURE AND ALL
--
�- �� BEDROCK
OT ALONG THE CROSS
PROJECTED ONTO HE CROSS SEONCTION ARE
© SURFACE WATER
CROSS SECTION LOCATION
MINANT
�
FRACTOURE ORIENTDATIION
ASH PORE WATER FLOW LAYER
WATER LEVEL ELEVATION
SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
DEEP ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
vwA-non
MEAN BORON (B) CONCENTRATION (ug/L)
e
«
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
Soo
MEAN TOTAL DISSOLVED SOLIDS (TDS)
TDS
CONCENTRATION (mg/L)
WELLSCREEN
BREAKLINE
----- COMPLIANCE BOUNDARY
J
a�
m�
M �
a
CATAWBA RIVER
Lq (LAKE WYLIE)
EL. 565'
(APPROX.)
700
650
r 600
550
GWA-035
B
339
soa
a1a
TDS
129
500
GWA-03D
B 117
450
GWA-BRA —
e 400
\200
_1
150
A
\ - \ 100
NOTES:
NOTES
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (ug/L)
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS)
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L)
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
DISTINCT, CONSISTENT FRACTURE SETS, BUT A WIDE VARIETY OF FRACTURE ORIENTATIONS
NO DATA AVAILABLE
AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE
ANALYTICAL PARAMETER B SO4 TDS
AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE
REPORTING UNITS ug/L mg/L m g/L
CONCEPTUAL ONLY.
15A NCAC 02L STANDARD 700 250 500
3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
'DUKE
ENERGY
CAROLINAS
161P
synTena
GRAPHIC SCALE
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
APPROVED BY: C. SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT-DD (6-12A)
www.synterracorp.com
VALUE (SHALLOW FLOW 50 5.4 154
VALUE (DEEP FLOW ZONE)i 50 14.5 173
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 50 7.3 221
i- BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
FIGURE 6-12a
GENERAL CROSS SECTION D-D'
CONSERVATIVE GROUP
MEAN OF BORON, SULFATE AND TOTAL
DISSOLVED SOLIDS (TDS)
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

(WWD-40
T) �_ COMPLIANCE BOUNDARY - D,
(EAST)
1
ASH BASIN
I I I
m p N i PRIMARY POND 1 PRIMARY POND 2PRIMARY POND 3
7 0 0 NNNN
r
CD I
JC9t7t90 Q _ Q _ vavamu�lentopNNNNNN aaaa650 ASH Q Q Q Q Q ASH m m
�� J
--------------- ----- ------
_ _ _ __
--------- m
__—____----- ��_
RE _—__—___—___—___—_= Q
PORE__--__--__--__-====�===-===-==-_= 0-==-=--=--=--=--=--=--=-----=--=--=----___--____--____-_—_
_ _
sr WATER _ _ _ _______________________________
AB zssL — ASH PORE WATER
600 �►_ ____ ____ ____ ____ _ sr 12�4 __==_ =
- --------------- CATAWBA RIVER
AB-13D SY 1922 ___ ___ __ ♦ \r ♦n �r in
---------------------------- (LAKE WYLIE)
SAPROLITE sr 19D SAPROLITE A�zasL = ==__ FILL EL. 565'
sr �09 AR zsss SAPROLITE (APPROX.)
TRANSITION �► sr z32 �� ae-zss
550 ZONE Sr 209
GWA-03S
SAffzsRRu r 9s
Z I \
O / II \ / — I \ / / \I \ / — I \ / / I \ / /
R
\' , \ �`I / 1 / \ / \ / 1 \ '� ��1�/ \ / \ / \ \ / \ / 1 \ 1 \ TRANSITION
� 500 ' I — \ �/ — � � / — / — t / — \ ' / — \ - ' / _ \ AR-z58R- / � _ \ ZONE
i / \ \ — / l \/ i ` i l \ / l x/ i \ i II Sr 1 103
Lu GWA-z
W BEDROCK\ / 1 \ /� I / 1 �� \ /� I / 1 / \ //� I / 1 / \ /� I / 1 / \�/� I / 1 �'\
—f BEDROCK \
450
BEDROCKS
400 X I i
—
1
n r
cuu
BEDROCK\
BEDROCK
1001
NOTES
ASH BASIN
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
GWA-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
GWA-22D
WELL IN TRANSITION ZONE
GWA-21BR WELL IN BEDROCK
AB-35S
WELL IN ASH PORE WATER
GWA-5BR
ABANDONED WELL/
GEOTECHNICAL BORING
AL34
WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
Mom.*.
GENERALIZED GROUNDWATER
FLOW DIRECTION
mmmm%tm-
GENERALIZED ASH PORE WATER
FLOW DIRECTION
0
ASH
0
ASH PORE WATER
0
ALLUVIUM
®
FILL
0
SAPROLITE
®
TRANSITION ZONE
BEDROCK
©
SURFACE WATER
--
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
V
ASH PORE WATER FLOW LAYER
WATER LEVEL ELEVATION
V
SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
DEEP ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
x s.a
MEANS STRONTIUM CONCENTRATION (mg/L)
WELL SCREEN
v
BREAKLINE
-----
COMPLIANCE BOUNDARY
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019,
REFERENCED TO NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
700
650
600
550
500
450
400
200
150
�100
NOTES:
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS PER LITER
(Pg/L)
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED
FRACTURE ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC
- NO DATA AVAILABLE
BOREHOLES. AS CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING
ANALYTICAL PARAMETER
Sr
RESULTS DID NOT INDICATE ANY DISTINCT, CONSISTENT FRACTURE SETS, BUTA WIDE
VARIETY OF FRACTURE ORIENTATIONS AT THE SITE. THE ACTUAL NUMBER OF
REPORTING UNITS
Pg/L
FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE
15A NCAC 02L STANDARD
NE
DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
BACKGROUND THRESHOLD
3. ALL BOUNDARIES ARE APPROXIMATE.
VALUE (SHALLOW FLOW
300
ZONE)'
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
BACKGROUND THRESHOLD
240
VALUE (DEEP FLOW ZONE)'
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW
181
GRAPHIC SCALE
100 200 400
DUKE0
ENERGY
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:7/26/2019
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
APPROVED BY: C. SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECT_DD (6-12B)
www.synterracorp.com
synTeirid
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
FIGURE 6-12b
GENERAL CROSS SECTION D-D'
NON -CONSERVATIVE GROUP
MEAN OF STRONTIUM
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

(WWD T) COMPLIANCE BOUNDARY
� 11111 (EAST)
i
I �I� ASH BASIN — I
I I
m p C N i PRIMARY POND 1 PRIMARY POND 2PRIMARY POND 3
700 N N N N 700
C7f7U' U' Q _ Q =�• M
Of
mGfAtA mmM(�M ylp
J -- a ICf ICf N N !O t0
N N N N
m m m m
650 Q ■•■Q QQ ASH QQQQ QQQQQ ASH QQ J 650
______________________________ _---i-=--_------_--_- ----
-- ----- —L---- ------ —------------
--___-_— -------_ ____ —__—_ ---_ ---_ ---_ ---_ ---_ ---_ ---_ ---__ M
GWA-215 -_—__ —__ __ __-- --__--------___--__--___ - AB-25S—_—__—_________—____ ___
a6-1Bs __= == - _= ASH PORE _ __ _ =-__--_-=-_-=-_-
Co Ll -____= AB-245 "____ ____`_ _= Co 2-____'____` a
co as -- __-_-== WATER -- --_ -------------------
Fe 97 ______--__________ =-__ Co L9 __ __ __ __ ___ - Fe 479 _ M p M M
Mn 78 1 _ Fe s7=_-===_=�____ Fe 3490 __= -_-__= -_-__= -__-__--ASH PORE WATER_:_==__===_===_=- 17 . (9
Mn 66 �� Mn 951 _-_-Q Q Q
__ � � CATAWBA RIVER
—600
SAPROLITE AB-LRD SAPROLITE AB-24SL co <nl = FILL V' V' (LAKE WYLIE)
C
.
aI co al Fe 73 = EL.565'
e sFe<95SAPROLITE (APPROX.)
_Z---------
550 n B TRANSITION �► aB zsss _• CUAB-26S12 550
ZONE Co 1 Fe 743
Mn 240 GWA-03S
Co 115
A&25BRU
Z — \ \ / — \ / \ / — _ \ / \ / — \ / \ / — — \ co / \ / — — \ Fe 7092
Feco TRANSITION Mn zL3a
�\1 9' /1 /1
a 500 \I— \'/ /� — 1 / —� \ — \�/ _ /� _ / _ _ \�/ _ /� _ \ Mn �/ _ /� _ 1 Fe _ ,/ ZONE 500
W\ / / / \\/I I / \ / / \\� I / \ / \�/ i / \ / / \\/ I / \ / �x/ I / \\ / AB-24BR / \�/ Co (11 i /Mn GWA-21D
J Co al Fe as I I
W / Fe 187 BEDROCK\ / 1 \ / \ I / 1 \ \ / \ / 1 \ // I / 1 \ / \ / \ I / 1 , \ / \
Mn 6 fei BEDROCK-
//\_
450 / / cGWA-zie.i \/ / / \ / I / \ / / / I / \/ / %\ / I / \/ / I / \/ / i\ / I BEDROCK
Q3 450
\ / I / /\ / I / \/ \ / — / l I / \ \ ' Fe
F. 6I / I / \ /� I I / \ /� I I / \ /� I\I / 1 \ \ /� Mn l
--of
GWA-03D
Co 0.3 /
X Fe 133 GWA-03BRA
/��<� I \ / \ / I / \ / /! \ / I / \ / / \ / I / \ / / \ I / \ / \ I / \ / \ / k / \ / \ I /
\ / \ Mn 13 �/
/�\/400
LUU \ / I \ / — I - \ / I \ / — I - \ / I
GEOTECHNICALBORING
\ / — I - \ / I
\ / — I -
\ / I \ / — I - \ / I \ / — I - \ /
I \ / — LUU
BEDROCK\\
150 1/ \/� /1\/\ /1 �\/\ /1\/\ /1 \/\ /F-7--._\�\ /1 \/\ /1\/\
/1
\/\ /1\/\ /1 \/\ /1\/\ /1 �\/\
/1 �\/ 150
BEDROCK(\
/
—100
NOTES
N
NOTES:
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
LEGEND
GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO
USING DATA RANGING
AN INN ANUANGANESE
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE
ASH PORE WATER FLOW LAYER
NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
2. COBALT (Fe), (Mn) CONCENTRATIONS
GWA-22D WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION
SHALLOW ZONE FLOW LAYER GROUNDWATER
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
ARE IN MICROGRAMS PER LITER (Ng/L)
- NO DATA AVAILABLE
IGWA-21BR1 WELL IN BEDROCK
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
ALLEN
STEAM WELL IN ASH PORE WATER
WELL WATER LEVEL ELEVATION
DEEP ZONE FLOW LAYER GROUNDWATER
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE
ANY
DISTAB-35S FRACTURE
OR ENT TI ONS AT THE SITE. THNCT, CONSISTENT AE ACTUAL NUMB R OFCTURE SETS, BUT A FRACTURES S IDE VARIETY S AR TOO NUMEROUS
ANALYTICAL PARAMETER Co Fe Mn
REPORTING UNITS Hg/L Hg/L Ng/L
STATION
GWA-5BR ABANDONED WELL/
WELL WATER LEVEL ELEVATION
TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES
VERSUS DEPTH ARE CONCFPTIIAL ONLY
15A NCAC 02L STANDARD 1. 300 50
BACKGROUND THRESHOLD
ASH BASIN
3H LANDFII
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
AL34 WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED ASH PORE WATER
FLOW DIRECTION
ASH
0
ASH PORE WATER
0
ALLUVIUM
®
FILL
0
SAPROLITE
®
TRANSITION ZONE
BEDROCK
SURFACE WATER
--!�— --
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
V
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
GWA-z1nA
MEAN BORON (B) CONCENTRATION (ug/L)
B
<so
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
soa
1
MEAN TOTAL DISSOLVED SOLIDS (TDS)
IDS
13°
CONCENTRATION (mg/L)
WELLSCREEN
BREAKLINE
----- COMPLIANCE BOUNDARY
3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
GRAPHIC SCALE
0 100 200 400
if DUKE
ENERGY
V5X
HORIZONTAL SCALE: 9" = 400'
VERTICAL SCALE: 1" = 80'
VERTICAL EXAGGERATION
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:7/26/2019
REVISED BY: D. KREFSKI DATE: 12/8/2019
CHECKED BY: L.DRAGO DATE: 12/8/2019
APPROVED BY: C.SUTTELL DATE: 12/8/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: "IT"(6-12C)
www.synterracorp.com
synTeiid
VALUE (SHALLOW FLOW 5.7 1,422 608
BACKGROUND THRESHOLD 0.82 665 256
VALUE (DEEP FLOW ZONE)'
BACKGROUND THRESHOLD
VALUE (BEDROCK FLOW 0.35 1,242 360
ZONE)'
�-INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACs) OF THE
15A NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013.
'-BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
FIGURE 6-12c
GENERAL CROSS SECTION D-D'
VARIABLE GROUP
MEAN OF COBALT, IRON AND MANGANESE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

750E _ — E' 750
(WEST) COMPLIANCE BOUNDARY _� (EAST)
C m N i ACTIVE ASH
BASIN
700 N N N ASH BASIN EAST DAM 700
i
�� U' __■ Q i��rn `1► ----F�-I_-L-LQ-M
m aJ m 0N0 �a Bo0'B00'
650650 ASH ASH
-___ �ASH ��WATER ELEVATION_634
f--
__________ __—.___---------------_--_--_----____--________---_ AB-215__—_—__—__----------------------------
___________________________________________- ________ 8 3880
________ =__=�=_=�=_= ASH PORE WATER:-====�=_ -_________________________________ ____ ____ ____
.. 504 78.9 504 1 504 134_ _ __
- - ---- ----------------------------------------------------- CATAWBA
'===r===-===-===-===_`=_-===-===-===-===-===-===-=-==-=-=--=-""_---- to C m m
TDs a7a RIVER
---------------------------------- - - -- - - - - --------- --------
600 _____ - __ -___ _ = --===-===-===-===-===-===-= - ___ __ -_= 600
SAPROLITE GWA-ax--===-===-=___ - ---_-_ _ -= AazuL---------------------------- ASH _PO_RE _WA_TER===--=====-===-===-===-=_-===_==-===-== FILL � � � � (LAKE
_ =0-________________________
B <so - e nac =' __==-===-===-===-===-===-__-------------------------------------------------- OD m m m WYLIE)
G1NA-240 _—__ _____ —____
s04 1s3 - _________________________ _ __�__________________________________ �Q�Q Q Q EL. 565
B <50 504 131 ____------------------
SAPROLITE_____—__—__—__ ___ __________________________ ___ ___ ___ ___ ___ ___ ___ ___ —__ —__ —___
______________
son zs DS 1O3 TIM a�
----T-----
--------------------------------------------------------- ------
------------------------------------------------- ----- -
------------------------------------ ------
__ AB 225 B <50
550 a 78 B <50 550
s04 I 13 SAPROLITE s04 z1 1om 19a
OZ \ /. \ I / II \ \— / D5 ss TDS sa TDs 1za
SAPROLITE
H — �'���� 1 TRANSITION ZONE �_uD
GWA-24BR \ / i B <50 =NSITIONLu 500 a <SD A 09D 500
J _TD3 1131 B A -MR SO4 z3\ SO4LU LsBB '"TDS z3o AB-WD
\ \/ \ �� \ \/// �/ \ \ BAB218R� \ \ v // — / \ \/// — / \ \
1 7 i t l\ I \ \/ 7 f l\ \/ 7 i l\ � I \ i \/ 7 i l\ I \ B 2mo B so 7
\ I \ \ I \ \ 504 37.9 504 293 I \
,� DS 147
450 /\/ /1\�/\I/1\/��/1\/\/\I/1\/\/D K\/7/\I/1\/\%\I 1os 171\/_\/\/1\�\/\I/1\/\/\1-1-1\/\I/ 450
BEDROCK/ / ,� ��
\ / — 1 7\-- \ / — 1 / -- \ / — — 1 /\-- \ — / — — 1 /\-- \ — / AB 22BR \
\/ _ _ 21BRLi B/EDI RiOCAKl-i \ / S0B 4 12ss33a BB <so
SO4 113 \I/ 1 \ / \ //\I/ 1 \ �\ / \I/ 1 \ / \ / \I/ 1 \ \�/ \I/ TDS 3rs
400 400
350
\ / / 7 1 / / / 7 / / / 7 1 / / / 7 / / / 7 1 / ` - \ / / 7 1 / / / u TDS SSI
150 \ \ _ \ \ I \ \ \ \ I \ \ _ \ \ I \ \ \ \ I \ \ _ \ \ I \ ` \ \ I \ ` -\ -ISO
100
100
NOTES:
71. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
/ / \ I \ / I \ / / \ I \ / I \ / / \ I \ / I \ / / \ I \ / I \ / / \ I GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
50 - \ / 1 , � \ / \ / 1 - \ / 1 , \ / 1 \ / 1 , \ / \ / 1 - \ / 1 , \ / \ / 1 \ / 1USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
LEGEND 2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER LITER (pg/L)
GWA-22S WELL IN FILL/ALLUVIUM/SAPROLITE ASH PORE WATER FLOW LAYER
WATER LEVEL ELEVATION 3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS)
CANAL ROAD GWA-22D WELL IN TRANSITION ZONE SHALLOW ZONE FLOW LAYER GROUNDWATER NOTES CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L)
ALL GWA-21BR WELL IN BEDROCK WELL WATER LEVEL ELEVATION - NO DATA AVAILABLE
STEAM 1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO ANALYTICAL PARAMETER B 504 TDS
STATION AB-35S WELL IN ASH PORE WATER V DEEP ZONE FLOW LAYER GROUNDWATER NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988. REPORTING UNITS pg/L mg/L mg/L
GWA-5BR ABANDONED WELL/ WELL WATER LEVEL ELEVATION 2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE 15A NCAC 02L STANDARD 700 250 500
P LLEN ROAD GEOTECHNICAL BORING BEDROCK FLOW LAYER GROUNDWATER ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS BACKGROUND THRESHOLD
RETIRED AL34 WATER SUPPLY WELL - WELL WATER LEVEL ELEVATION CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY VALUE (SHALLOW FLOW 50 5.4 154
ASH BASIN (DEPTH UNKNOWN) DISTINCT, CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS AT
AB-= MEAN BORON (B) CONCENTRATION (I1g/L) THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT BACKGROUND THRESHOLD 50 14.5 173
(ASH STORAGE/ RETIRED GENERALIZED WATER TABLE a 0 MEAN SULFATE THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE VALUE (DEEP FLOW ZONE)i
STRUCTURAL FILL) ASH BASIN sm 379 (SO4) CONCENTRATION (mg/L) CONCEPTUAL ONLY. BACKGROUND THRESHOLD
ASH LANDFILL GENERALIZED GROUNDWATER TDS �o MEAN TOTAL DISSOLVED SOLIDS (TDS) VALUE (BEDROCK FLOW 50 7.3 221
FLOW DIRECTION CONCENTRATION (mg/L) 3. ALL BOUNDARIES ARE APPROXIMATE. BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
GENERALIZED ASH PORE WATER WELL SCREEN FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
CATAWBA FLOW DIRECTION 4. CROSS SECTION REPRESENTATIVE OFPRE-DECANTING CONDITIONS. TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
RIVER
(LAKE 0 ASH BREAKLINE
GRAPHIC SCALE
cA WYLIE) �
°SOP° c E �' DUKE 0 100 200 400 FIGURE 6-13a
N E' 0 ASH PORE WATER GENERAL CROSS SECTION E-E'
�° 9 AcrroE ----- COMPLIANCE BOUNDARY
z ASH BASIN ALLUVIUM �� ENERGY VERTICAL
CONSERVATIVE GROUP
o® FILL VERTICAL SCALE: 1" = 80'
0 5X VERTICAL EXAGGERATION
0 SAPROLITE CAROLINAS DRAWN BY: J. CHASTAIN DATE:7/26/2019 MEAN OF BORON, SULFATE AND TOTAL
NOTE: ® TRANSITION ZONE REVISED BY: D. KREFSKI DATE: 12/9/2019 DISSOLVED SOLIDS (TDS)
CROSS SECTION E-E' IS LINEAR IN NATURE AND ALL CHECKED BY: L.DRAGO DATE: 12/9/2019
LOCATIONS NOTALONG THE CROSSSECTION ARE �_� BEDROCK APPROVED BY: C. SUTTELL DATE: 12/9/2019 CORRECTIVE ACTION PLAN UPDATE
PROJECTED ONTO THE CROSS SECTION. SURFACE WATER41P PROJECT MANAGER: C. SUTTELL ALLEN STEAM STATION
CROSS SECTION LOCATION --�-- PREDOMINANT BEDROCK synTerra LAYOUT: XSECTEE(6-13A) BELMONT, NORTH CAROLINA
FRACTURE ORIENTATION www.synterracorp.com

75o
E
(WEST)
m
G
700
lotii
650
t�
I
I
GWA-245A
600 sr ]0
SAPROLITE
I
cwa-zao I
/ sr 92
_ 550
Z
O
H
Q
J 500
Lu
450
400
100
50
COMPLIANCE BOUNDARY
El 750
(EAST)
ACTIVE ASH
ASH BASIN omi
EAST
m to C: J co ernNNfill
FILLQQaam
ASH
ASH
-- )__
ASH
WATER ELEVATION = 634
...... mmn -------------------
---�--�---�---�---�---�---�---�---�---�---�---�---�---�-------
I GWA-09D I
IIIIIIIIIII—ab. SAPROLITE
J
& CATAWBA
0
0
RIVER
0
0
(LAKE
m m
m
m
WYLIE)
Q Q
Q
Q
EL. 565'
AB-106
AB-22s sr 22D
\ sr Q
I SAPROLITE
% \-- TRANSITION ZONE
\/ \/ I / \ / i / I \ AB z0D \ / — _ \ \ / — \ TRANSITION ZONE
Sr, lib
Aa-ED AB_WD � \
\_ / \/ / — 7' \/ / / \ \ \f / / \ \ \— / V / — / \ \ �— / /
I i \ i \ I \ i \� —(—i- i \ I � \ \ / I i \ i \ \ / I i \ i \ � I / \ i \ / I i \ i \ I / \ i
\ // I \\\ �\ I \�.\\ \/ \
BEDR2
284
_\ BEDROCK
\
_BR
/I \/
\/
\ N, \ IN, / \ N, \ / \
/\--—
i
AB-21s5
sr 99
SAPROLITE
700
0
500
\`_�
\\� / I / \`_� \\� /
I / \`_� it \\� / I / \`_�
\\11 / I / \`_� \\� / I / \`_�
150
/I
\ I \ /_ / \
\ I / 1 / \ / N, / 1 \ \ I / 1
i /I i
I \ /_ / \ I
/ \ / \ / 1 \ \ I / 1 / \ / \ / 1
i /I
\ /_ / \ I \ /_ / \
\ \ I / 1 / \ / N, / 1 \ \ I / 1
i\ /I i /I
I \ /_ / \ I \ /_ / \
/ \ / \ / 1 \ \ I / 1 / \ / \ / 1 \ \ I / 1 / \ / N,
\ ;
/mil\\li/mil\\li/mil\\li/mil\/I/\li/mil\/I/\li
_ _ _ \/� / 1,
\/� / 1, \/� / 1
_ _ _
\/i / 1 \/� / 1, \/\ /1
_ _
\/\ / 1 \/\ / 1 \/\ / 1
_ _ _ _ _
\/\ / 1 \/\ / 1 \/\ / 1 \/\ / 1 \/\
/ 1
100
/
/
N, /
— / \ N, / — / \
N, / — / \ N, / — / \ N, / — / \ N, " / — /
NOTES:
\ — \ /
\ I
\ N, \ / — — \ / \ \
\
\ \ /
\ / \ \ / \ I / 1 \ / \ / \ I / 1
\ \\\\\1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
\ / \ I / 1 \ / \ / \ I / 1 \ / \ I / 1 \ / \ / \ I / 1 \ / \ I GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
LEGEND
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
2. STRONTIUM (Sr) CONCENTRATIONS ARE IN MICROGRAMS PER LITER
GWA-22 WELL IN FILL/ALLUVIUM/SAPROLITE
ASH PORE WATER FLOW LAYER
NOTES
(u9/L)
GWA-22D WELL IN TRANSITION ZONE
WATER LEVEL ELEVATION
- NO DATA AVAILABLE
GWA-21BR WELL IN BEDROCK
SHALLOW ZONE FLOW LAYER GROUNDWATER
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO
NORTH AMERICAN VERTICAL DATUM OF 1988.
ANALYTICAL PARAMETER Sr
ALLEN -
WELL WATER LEVEL ELEVATION
(NAVD)
REPORTING UNITS pg/L
STEAM
STATION
AB-35S WELL IN ASH PORE WATER
V DEEP ZONE FLOW LAYER GROUNDWATER
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
15A NCAC 02L STANDARD NE
GWA-5BR ABANDONED WELL/
WELL WATER LEVEL ELEVATION
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
BACKGROUND THRESHOLD
LLEN ROAD
GEOTECHNICAL BORING
V BEDROCK FLOW LAYER GROUNDWATER
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
DISTINCT, CONSISTENT FRACTURE SETS, BUT WIDE VARIETY OF FRACTURE ORIENTATIONS
VALUE (SHALLOW FLOW 300
ZONE)'
RETIRED
AL34 WATER SUPPLY WELL -
(DEPTH UNKNOWN)
WELL WATER LEVEL ELEVATION
AT THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE
AT THIS SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE
BACKGROUND THRESHOLD
240
ASH BASIN
"&�'ss MEAN STRONTIUM CONCENTRATION (ug/L)
CONCEPTUAL ONLY.
VALUE (DEEP FLOW ZONE)'
BACKGROUND THRESHOLD
(ASH STORAGE/
STRUCTURAL FILL) RETIRED
_ GENERALIZED WATER TABLE
3. ALL BOUNDARIES ARE APPROXIMATE.
VALUE (BEDROCK FLOW 181
ASH LANDFILL
�� GENERALIZED GROUNDWATER
FLOW DIRECTION
WELL SCREEN
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
GENERALIZED ASH PORE WATER
FLOW DIRECTION
BREAKLINE
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
ORIVERA
(LAKE WYLIE)
0 ASH -----
COMPLIANCE BOUNDARY
GRAPHIC SCALE
E,
0 ASH PORE WATER
DUKE
o 100 200 400
FIGURE 6-13b
ACTIVE
ASH BASIN
ALLUVIUM
oGENERAL
446) ENERGY
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1"=80'
CROSS SECTION E-E'
® FILL
5X VERTICAL EXAGGERATION
NON -CONSERVATIVE GROUP
0 SAPROLITE
CAROLINAS
DRAWN BY: J. CHASTAIN DATE:7/26/2019
MEAN OF STRONTIUM
NOTE:
® TRANSITION ZONE
REVISED BY: D. KREFSKI DATE: 12/9/2019
CHECKED BY: L.DRAGO DATE: 12/9/2019
CORRECTIVE ACTION PLAN UPDATE
CROSS SECTION E-E' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
E== BEDROCK
APPROVED BY: C. SUTTELL DATE: 12/9/2019
PROJECT MANAGER: C. SUTTELL
ALLEN STEAM STATION
PROJECTED ONTO THE CROSS SECTION.
SURFACE WATER
LAYOUT: XSECTEE(6-13B)
BELMONT, NORTH CAROLINA
--'s--- PREDOMINANT BEDROCK
FRACTURE ORIENTATION
bynTerra WWw.synterracorp.com
CROSS SECTION LOCATION

750d E _
(WEST)
� m N
700 N N N
a a
Co
Fe
Mn
1 0.4
198
66
=_-__---
-
Co 1 0.3
Fe 475
Mn 34
SAPROLITE
Gyyq_D95
GWA-24D
Co 1
0.1
Co Zl
Fe
Mn
_ Mn
324
AB-20D
Co
Fe
<Q1
54
ASH
111111111-00. SAPROLITE
COMPLIANCE BOUNDARY
ASH BASIN
J
m mCN(n N
N N N N N N
ASH 00aaaaa
ASH PORE WATER
1 AB-215L
F�
I AB-215S I
SAPROLITE
ASH WATER ELEVATION = 634
_
(EAST)
ACTIVE ASH '
_ BASIN
EAST DAM
i
�
�
(A�mm
I
N N
N N
aaaOO
Mn <5 Mn 114 Mn I 1146
' rTRANSITION ZONE
i / AB-21D TRANSITION ZONE
500 GWA-24BR GWA-0MR GWA-09DCo 0.3 co a1 co 0.1\\/\/1/\\/FeFe 1 -?ZD
1Mn Mn Co 0.4
l\ \/ i \f l\ AB-21BR
co
"BEERQ CK _
450 / \ / \'//1 \�/ \I/ 1 \' 7�/ 1 \'—/ \I \ / \ / \I \ / / \I \ / \ / \I ABzzBR
BEDROCK / / 1 / Mn 1 / /\\� / 1 / 1 / \
/\-- \ — \ /\ — \ — \ /\-- \ — 1 /\-- \ — \ / co 0.3
\,j Fe 4a1
m
y'I.BEDROCK_ Mn 99
/ \
///4UU \ — \ / — \ \ / — \ \ / — \ — \ /� \ \ / —\�.- \ / — /( \ / AB 22BRL
'
• \/� /1/ \/\ /1 \/mac /1 \/� /1/ \'� /1/ \/\�/1 \/\ /1 \/\ /1 \/\ /1 \/\ /1 \/'C /1 \/\ /11 /\
10
50
CATAWBA
RIVER0(LAKE
mmm
WYLIE)
Q Q
Q
EL. 565'
(APPROX.)
AB-1o5
Co
Fe
l]—j
19
%
750
700
500
AB-10D
Co
0.1
1 �
\
Fe 57
Mn <5
450
A&IDBR
\ \
Mn
3;
400
Co
0.1
—
\
ern
\ , V I / \ - \ /
I / \ "/ \
1 / \ "I \ /
I , \ "-4 \
1 / \ "I \ /
I \ / \ /
I / \ /
/
r / \ '
150
-100
NOTES:
1. ALL CONCENTRATIONS SHOWN ARE STATISTICAL MEANS OR
\ / \I 1
\ \ / \I/ 1
\' \ / \I 1
\ / \ / \I/ 1
\ / \I 1
\ \ / \I/ 1
\ / \I 1
\ / \ / \I/ 1
\' \ / \I 1
\ \ / \I/ 1
\' \ / \I 1
GEOMEANS CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
\
\ /
\ /
,'
\ /
,'
\ /
\ /
\ /
2. COBALT (Co), IRON (Fe), AND MANGANESE (Mn) CONCENTRATIONS
LEGEND
ARE IN MICROGRAMS PER LITER (Pg/L)
- NO DATA AVAILABLE
GWA-22S
WELL IN FILL/ALLUVIUM/SAPROLITE
_V ASH PORE WATER FLOW LAYER
NOTES
ANALYTICAL PARAMETER Co Fe Mn
NOTE:
CROSS SECTION E-E' IS LINEAR IN NATURE AND ALL
LOCATIONS NOT ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
GWA-22D
WELL IN TRANSITION ZONE
GWA-21BR WELL IN BEDROCK
AB-35S
WELL IN ASH PORE WATER
GWA-5BR
ABANDONED WELL/
GEOTECHNICAL BORING
AL34
WATER SUPPLY WELL -
(DEPTH UNKNOWN)
GENERALIZED WATER TABLE
GENERALIZED GROUNDWATER
FLOW DIRECTION
GENERALIZED ASH PORE WATER
FLOW DIRECTION
ASH
0
ASH PORE WATER
ALLUVIUM
®
FILL
SAPROLITE
®
TRANSITION ZONE
BEDROCK
SURFACE WATER
----
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
WATER LEVEL ELEVATION
SHALLOW ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
DEEP ZONE FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER
WELL WATER LEVEL ELEVATION
MEAN COBALT (CO) CONCENTRATION (Ng/L)
MEAN IRON (Fe) CONCENTRATION (pg/L)
M mMEAN MANGANESE CONCENTRATION (pg/L)
WELLSCREEN
v
BREAKLINE
----- COMPLIANCE BOUNDARY
REPORTING UNITS Pg/L Ng/L Ng/L
1. DEPTH TO WATER GAUGED IN MONITORING WELLS ON MARCH 13, 2019, REFERENCED TO
NORTH AMERICAN VERTICAL DATUM (NAVD) OF 1988.
15A NCAC 02L STANDARD 1* 300 50
BACKGROUND THRESHOLD
2. FRACTURES DEPICTED ON THIS CROSS SECTION REPRESENTS THE GENERALIZED FRACTURE
VALUE (SHALLOW FLOW 5.7 1,422 608
ORIENTATIONS BASED ON TELEVIEWER LOGGING AT SITE SPECIFIC BOREHOLES. AS
ZONE)'
CONCEPTUALLY ILLUSTRATED HERE, TELEVIEWER LOGGING RESULTS DID NOT INDICATE ANY
BACKGROUND THRESHOLD
DISTINCT, CONSISTENT FRACTURE SETS, BUTA WIDE VARIETY OF FRACTURE ORIENTATIONS AT
0.82 665 256
VALUE (DEEP FLOW ZONE)'
THE SITE. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS
BACKGROUND THRESHOLD
SCALE. IN ADDITION, THE DEPTH AND LENGTH OF FRACTURES VERSUS DEPTH ARE
VALUE (BEDROCK FLOW 0.35 1,242 360
CONCEPTUAL ONLY.
ZONE)'
3. ALL BOUNDARIES ARE APPROXIMATE.
* - INTERIM MAXIMUM ALLOWABLE CONCENTRATIONS (IMACs) OFTHE
15A NCAC 02L STANDARD APPENDIX 1, APRIL 1, 2013.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED USING DATA
FROM BACKGROUND GROUNDWATER SAMPLES COLLECTED MARCH 2O11
TO DECEMBER 2018 AS SUBMITTED IN JUNE 2019.
'DUKE
n ENERGY
CAROLINAS
41P
synTena
GRAPHIC SCALE
0 100 200 400
HORIZONTAL SCALE: 1" = 400'
VERTICAL SCALE: 1" = 80'
5X VERTICAL EXAGGERATION
DRAWN BY: J. CHASTAIN DATE: 7/26/2019
REVISED BY: D. KREFSKI DATE: 12/9/2019
CHECKED BY: L.DRAGO DATE: 12/9/2019
APPROVED BY: C. SUTTELL DATE: 12/9/2019
PROJECT MANAGER: C. SUTTELL
LAYOUT: XSECTEE(6-13C)
www.synterracorp.com
FIGURE 6-13c
GENERAL CROSS SECTION E-E'
VARIABLE GROUP
MEAN OF COBALT, IRON AND MANGANESE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

AB-21SL
AB-21SS
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
10
10
9
R
9
8
00
8
7
CL
7
6
6
5
5
400
500
200 £
300
0 a
200 a
1000
-200 C
0
-400
E
E
U
z
552
U
s
160
140
r
546
'
120
U
540
U
100
c
0
C
0
80
534
w
60
U
W
U
N
C_
a
a
5
5 w
c
638
4
c
638 4 m
W
-W
o:
,�636
3
> 636 3
O0�
0
W CO
`2
W
� 2
JQ-@634
_ _�. 1 i
1
JZ634
1
"632
"
632 0
L
,,
0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
L
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
3
Date
3
Date
AB-21SL: Ash pore water well located in the southern portion of
AB-21SS: Shallow flow zone well located in the southern portion
the Active Ash Basin. See Figure 6-16 for monitoring location.
of the Active Ash Basin. See Figure 6-16 for monitoring location.
AB-26S
GWA-3S
�-;
4/1/2019 5/1 /2019 6/1/2019 7/1 /2019 8/1/2019 9/1/2019
11'�
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
:D
10
9
=
10
9
a
8
CL
8
7
7
6
6
5
5
350
350
175 E
175
0
E
..
..
0 0.
-175 W
W
-3500
-1750
-525
U
-350
rA
3
560
A
260
490
420
U
240
350
220
U
280
v
200
210
'�-
w
180
a
w
y
a
rA
c
600
5
c
576
5
41
> ,.
590
r.
4
4'
> ,
..
574 4
to 0000
3 —
.2 COD0
572
�'s✓�r,MJti
3 —
0
580
w
— 0
w
>>
2 E
>>
J Z
570
2 C
i z
V
570
1
..
1
r
2
568
M
560
0
f0
3
3
0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
AB-26S: Shallow flow zone monitoring well located within the dam
GWA-3S: Shallow flow zone well located downgradient of the
of the Active Ash Basin. See Figure 6-16 for monitoring location.
Active Ash Basin. See Figure 6-16 monitoring location.
LEGEND Notes:
DUKE
DATE:10/31/2019
—
NAVD 88 -North American Vertical Datum
pH (S.U. )
• �ENERGY
DRAWN BY: D. AVARD
FIGURE 6-14
—
Oxidation
in -inches
Reduction Potential (ORP) (mV)
r.
''
REVISED BY:
GEOCHEMICAL WATER QUALITY
—
pS/cm - micro Siemens per centimeter
Specific Conductivity (pS/cm)
CHECKED BY: L. DRAGO
PLOTS
—
Decanting Start Date (06/05/2019) my -millivolts
CORRECTIVE ACTION PLAN UPDATE
Daily
Total Rainfall (inches) S.U. - standard unit
APPROVED BY: L. DRAGO
ALLEN STEAM STATION
PROJECT MANAGER: C. SUTTELL
BELMONT, NC
synTerra
www.synterracorp.com

Notes' ■ AB-02D o AB-34D CCR-07D A GWA-03D Bedrock Groundwater
• AB-09D o AB-35D* CCR-08D ♦ GWA-04D
1. * - Sampling ♦ AB-10D v AB-36D CCR-090 ♦ GWA-06DA ♦ R Legend
AB-11D O AB-37D CCR-11DA Z GWA-07D \ ■ AB-U4BR CCR-26BR
event prior • AB-22D a AB-38D CCR-14D * GWA-08D a. s� * CP-06BR
^� z AB-26D 'A AB-39D ■ CCR-18D ❑ GWA-17D x — ; w • AB-14BR
to 1/1/Z018 * AB-31D* ■ BG-01D* • CCR-20D O GWA-18D eP ° ♦ ♦ ■ ■ AB-10BR ■ GWA-01BR
❑ AB-32D • BG-01DA ♦ CCR-21D ■ GWA-09D y ¢� * 0 ■ AB-10BRL ♦ GWA-03BR
■ AB-04D A BG-02D v CCR-22DA • GWA-14D* / a A x 4 \ ♦ AB-22BR A GWA-03BRA
• AB-12D v BG-03D ♦ CCR-23D A GWA-14DA
AB-13D ♦ BG-04D * CCR-26D ♦ GWA-15D a� • AB-22BRL v GWA-03BRL
• CCR-01D ■ CCR-BG-OIDA ♦ GWA-16D — ■ n° ■ AB-21BR ♦ GWA-04BR
AB-14D • CCR-01DA ■ CP-01D z GWA-19D ♦ x* x GWA-04BRL
■ AB-20DCCR-02D • CP-02D * GWA-21D* AB-21BRL
• AB 24D *.r* . CCR-03D* A CP-03D ❑ GWA-21DA V AB-24BR * GWA-05BR
. AB-258RU • ♦ AB-27D CCR-03DA • CP-04D O GWA-22D * ❑ GWA-05BRA
• AB-27BR
♦ AB-28D CCR-04D* ♦ CP-OSD o GWA-23D • � 0 GWA-056RL
♦ AB-35BR
z AB-29D - CCR-04DA k CP-06D v GWA-24D i ■ o GWA-05D
CCR-05D ■ GWA-01D U GWA-26D * AB-38BR
❑ AB-33D CCR-06D • GWA-02D ♦ • ■ BG-01BR v GWA-06BR*
�■ O GWA-06BRA
x 0 ♦ �o = BG-02BRA-2 x GWA-06BRL
A _ 80% \2 • 80% R ■ BG-04BR BR 0 GWA-09BR
\ CCR-16D 0 GWA-21BR
60% °\ �� _ t60% 'Pp CCR-17D A GWA-24BR
-.r -
y� v * ♦ \ /40% g ♦ 40%\
$ • o *• ♦ o °
o _ _ Deep�° � `� a
i ■ • r Ca — Groundwater — CI • v ■ ❑
♦ ■ x i • x
V �• $
J' tea° o� o Ash Pore Water
0%
60% a r`' o * o 00% so Legend \ / a�
/ z o P ■ AB-20S AB-29S so% ■ soy R
ao�ro tS >wz ° o� • ao% • AB-21S AB-295L �o Go' ypo
�■ yc ♦ ❑ �� 3k A AB-21SL AB-30S g so°6 \ z ` k soy° o
* �'y� ■ , * 20% AB-23S AB-33S / a °
• d �° ; ♦ AB-24S * AB-34S 40� - * • • z 40�\
QqL e AB-24SL • AB-35S ■ yt,� �° — •a g ■
Shallow `�' "° * AB-255 • AB-365 20% *�/:. ♦♦� ♦• • 20°k
.w Ca — — CI ❑ AB-25SL A, AB-37S • o* g x �♦ ■
Groundwater o AB-27S v AB-38S* 1 1 a
AB-28S ♦ AB-39S* d Bedrock �
■ AB-01R • AB-3355 o CCR-175 V GWA-045 — —
• AB-02 ♦ AB-35PWS v CCR-18S* • GWA-05S Ca O1
♦ AB-05 * AB-38S5 o CCR-20S* z GWA-085 Groundwater —
♦ AB-06A ■ BG-015 g CCR-21S * GWA-175
♦ AB-06R • BG-02S CCR-22S ❑ GWA-185 DRAWN BY: R. Badum DATE: 10/8/2019
z AB-09S ♦ BG-03S ■ CCR-23S ■ GWA-095 DUKE
* REVISED BY: R. Badum DATE: 12/3/2019 FIGURE 6-15a
* AB-I05 • BG-045 ■ CCR-BG-01S • GWA-14S ENERGY,
❑ AB-22S ■ CCR-CIS ■ CP-01S ♦ GWA-15S CAROLINAS CHECKED BY: L. Drago ASH PORE WATER AND
D AB-265 • CCR-025 • CP-02S • GWA-16S APPROVED BY: L. Drago
AB-045 ♦ CCR-03S A CP-035 ♦ GWA-19S GROUNDWATER PIPER DIAGRAMS
AB-12S • CCR-07S • CP-045 x GWA-21S PROJECT MANAGER: C. Suttell
www.synterracorp.com
AB-135 ♦ CCR-08S ♦ CP-065 * GWA-225 tip
ACTION PLAN UPDATE
■ AB-21SS x CCR-09S ■ GWA-01S ❑ GWA-235 ALLEN STEAM STATION
AB-25SS * CCR-11S • GWA-02S o GWA-24SA
AB-2955 ❑ CCR-145 GWA-035 GWA-265 '7" �/� Terra BELMONT, NORTH CAROLINA
o
CCR-165

°
Affected
\
AB-33D
AB-40D
�
Deep Groundwater
CCR-3DA O CCR-9D
CCR-4DA ■ CP-1D
Legend
O
■
C��Oo°
CP-6D 'A° � _*
o
GWA-27D /�' � ♦
o CO,
o x Potential
�° �' Mixing
AB-41D
AB-42D
♦
Z
CCR-5D
CCR-6D
A
♦
CP-2D
CP-3D
•
A
GWA-28D �
00 -
GWA-29D
°\°
ryo
AB-43D
*
CCR-7D
*
CP-4D
v
GWA-30D
Generall
Bedrock Groundwater Legend
• CCR-26BR • GWA-29BR
■ CP-6BR A GWA-613RA
■ GWA-28BR v GWA-613RL
AB-44D ❑ CCR-8D ❑ CP-5D ♦ GWA-6DA unaffected Bedrock
• CCR-26D * GWA-7D Groundwater
•
'A r
o\/ CPO
\o
Affected r ° � o � �Oo ° o
�" 0 ■ °\o ` 80% N 2 Vo o * 80% \/ �o
G a° oo d I °�x G o61
o
�Oo o0 o D
Potential 00 do
Mixing roo 00
20% 20%
OZ
Generally
Unaffected `o0 000 �00 T00 Deep �\ °�\° �°\ °
\
.— Ca Groundwater — Cl �
o �
80% r 2 6C ° 80% Ash Pore Water 80%
v Legend ON, C
�.� 60% \ s 60% (PO ■ AB-335 e 60%
40% 00° 40% ` • AB-42AP /40 %
AB-43AP
200 A A 20%
A
cP 6° r� °\° °\° °\° °\°
O. �o Oo 0 �o �O �O �O
�a Shallow — Cl Shallow
Groundwater Groundwater Legend
AB-33SS ■ CCR-75 * CP-4S
AB-415S A CCR-8S ❑ CP-6S
AB-425S V CCR-9S ■ GWA-27S
AB-43SS ■ CP-1S • GWA-28S
AB-445S A CP-2S A GWA-295
■ CCR-3S ♦ CP-3S V GWA-30S
20% •
■
IOo 00. �Oo a0o
0
*— Ca
Affected
— Cl
Potential
Mixing
Generally
Unaffected
80%
60% NO
40% `
20%

I♦
I
■
a `
r � -
� ! - A ■ `.
LL
M
•too
-r: p
o
c
x
t: o
i
A
O
D
0
LEGEND
- TRANSDUCER LOCATION FOR ASH BASIN
SURFACE WATER LEVEL MONITORING
O TRANSDUCER LOCATION FOR ASH BASIN
GROUNDWATER LEVEL MONITORING
❑ GEOCHEMICAL SONDE LOCATION FOR ASH BASIN
GROUNDWATER LEVEL AND WATER QUALITY
MONITORING
ACTIVE ASH BASIN WASTE
- RETIRED ASH BASIN WASTE
- ASH BASIN COMPLIANCE BOUNDARY
_ RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
- - DORS FILLS BOUNDARIES
SITE FEATURE
- DUKE ENERGY CAROLINAS PROPERTY LINE
3 STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE
MIX OF SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE,
'MPLE LOCATIONS ARE TO BE DEEMED APPROXIMATE.
i
. v�j Pe y ■
J ~
Q
~ y 1
- - , ►' STORAGE 1 RETIRE
ASH
-tea ■ ■. 1
RETIRED i ■ �, ■ �Z ,
ASH BASIN 1 I
1
i
■
■
i -
« - N 8
' r
■
s _ --Y ■ J _ AB-24S/SL/D/BR
■
�� AB-23S
/ GWA-9S/D/BR
Q� AB-20S/D
SOUTHWESTERN
L■ AB-21 S/B R
• . .
no PRIMARY
POND 2
n
AB-27S /
THE WATERS OF THE US HAVE NOT BEEN APPROVED BY THE US ARMY7.r'
)RPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A
J++
ZELIMINARY JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY
ETLANDS AND STREAMS BOUNDARIES WERE OBTAINED FROM AMEC
)STER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL
DUKE
375 0 375 750
FIGURE 6-16
-SOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION
iTED MAY 29, 2015.
'
ENERGY
GRAPHIC SCALE IN FEET SITE LAYOUT
ALL BOUNDARIES ARE APPROXIMATE.
CAROLINAS
DECANTING MONITORING NETWORK
DRAW N BY: C. WYATT DATE: 10/14/2019
PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
REVISED BY: C. WYATT DATE: 12/11/2019 CORRECTIVE ACTION PLAN UPDATE
AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON
14
APPROVED BY: L.DRAGO DATE: 12/11/2019 ALLEN STEAM STATION
ECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30, 2018.
CHECKED BY: L. DRAGO DATE: 12/11/2019
PROGRAM MANAGER: C.SUTTELL BELMONT, NORTH CAROLINA
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA
synTerra
-ATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83).
www.synterracorip.com

A13-9S Cluster
572 5
AB-10 Cluster
5
CCR-20 Cluster
5
575
r'
608
00
00
00
00 4
00
4
00"`+�`r'
4
> 570 �''"''ww,,,
>
> 606
z
z 570
z
0 3 C
..
0
VO
3E
..
0 604
3 C
..
d 568 w
w
f l ti
M
y
...,ma
w
W C
W 565
C
LU
y
C
2
2�
602
2 a10'
O�i
a�i
a�i
J
J
J
L
42 566
L
+;
560
L
J 600
3 1
3
1
3
1
A0
II I I
598
ll
564A 0
555
0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
Date
AB-9S Water Elevation (NAVD 88)
AB-1 OS Water Elevation (NAVD 88)
CCR-20S Water Elevation (NAVD 88)
AB-9D Water Elevation (NAVD 88)
AB-1 OD Water Elevation (NAVD 88)
CCR-20D Water Elevation (NAVD 88)
AB-10BR Water Elevation (NAVD 88)
CCR-21S
CCR-22S
GWA-3 Cluster
5
5
576
5
630
..
0000 628
4
.. 63300
00
4
..
Go
00
4
p
p
p 574
>
>
>
? 626
—z630
v
0
3.E
0
3 E
0
3 .E
624
41
+-+ 572
>
4-
>
01
4-
C
2 627
C
01
,�
C
Lu 622
w
.@
LU
-y
2 0:
-y
2 a
-y
2 W
620
j
J 570
yL
Ly 624
yL
3 618
1
3
J
1
3
I
1
II
568
II
I
I I i
616
621
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
Date
CCR-21 S Water Elevation (NAVD 88)
CCR-22S Water Elevation (NAVD 88)
GWA-3S Water Elevation (NAVD 88)
GWA-3D Water Elevation (NAVD 88)
GWA-3BRA Water Elevation (NAVD 88)
LEGEND Notes:
Ash Pore Water NAVD 88 North
r DUKE
DRAWN BY: D.AVARD DATE:10/31/2019
REVISED BY:
FIGURE 6-17a
-
Decanting Start (06/05/2019) Shallow Flow Zone American Vertical Datum
ENERGY,
CHECKED BY: L.DRAGO
HYDROGRAPHS — DOWNGRADIENT
Daily Rainfall Total (inches) Deep Flow Zone 1988
CAROLIhtAS
APPROVED BY:L. DRAGO
CORRECTIVE ACTION PLAN UPDATE
in - inches
Bedrock Flow Zone
PROJECT MANAGER: C. SUTTELL
ALLEN STEAM STATION
See Figure 6-16 for
�
monitoring locations
%
BELMONT, NORTH CAROLINA
synTena
www.,ynterracorp.com

AB-20 Cluster
AB-21 Cluster
AB-22 Cluster
5
5
602
5
w
640
•I,�
638
No new data
600
0
4
0
collected from AB-21 BR
4
0
4
>
>
due to data download
>
598
z
z
issues
z
o
�"hry
3
o
i
3
2
596
3
638
636
_
-W
w
W
W
4-
G1l
LU
%-
2
W
594
`�
a�
2
w
2 Q�
2
J
J
592
636
634
+
3
1
+�
3
1
+
3
590
1
r
l
I�
588
'
634A
0
0
632 0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019
5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
Date
AB-21 S Water Elevation (NAVD 88)
AB-20S Water Elevation (NAVD 88)
AB-21 SL Water Elevation (NAVD 88)
AB-22S Water Elevation (NAVD 88)
AB-20D Water Elevation (NAVD 88)
AB-21 SS Water Elevation (NAVD 88)
AB-22D Water Elevation (NAVD 88)
i
AB-21 BR Water Elevation (NAVD 88)
AB-22BR Water Elevation (NAVD 88)
AB-26 Cluster
GWA-9 Cluster
5
5
0
586
No new data
00 642
0
collected from AB-26D
4
0
4
>
due to data download
>
z
issues
z 640
c
3
c
c
c
3
,0-�
584
+0-,
m
—
c
M
a2i 638
—
c
LU
W
2
w
2�
d
N
L
582
i 636
4
3
1
3
I
I
1
�
634
I I
I
580
0
0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019
5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
AB-26S Water Elevation (NAVD 88)
GWA-9S Water Elevation (NAVD 88)
AB-26D Water Elevation (NAVD 88)
GWA-9D Water Elevation (NAVD 88)
GWA-9BR Water Elevation (NAVD 88)
LEGEND Ash Pore Water
Notes:
NAVD 88 North
f DUKE
DRAWN BY: D. AVARD
REVISED BY:
DATE: 10/31/2019
FIGURE 6-17b
Decanting Start (06/05/2019) Lower Ash Pore Water
-
American Vertical Datum
ENERGY
CHECKED BY: L.DRAGO
HYDROGRAPHS - UPGRADIENT AND SOUTHERN
Daily Rainfall Total (inches) Shallow Flow Zone
1988
CAROLIhtAS
APPROVED BY:L.DRAGO
ASH BASIN
Deep Flow Zone
in - inches
See Figure 6-16 for
PROJECT MANAGER: C. SUTTELL
CORRECTIVE ACTION PLAN UPDATE
�'
Bedrock Flow Zone
monitoring locations
ALLEN STEAM STATION
WnTena
BELMONT, NORTH CAROLINA
www.synterracorp.com

AB-24 Cluster
AB-25 Cluster
AB-27S
640 5
645
5
5
638
V
�"
00
"ti" ^ r "�
4
640
4
636
4
G 635
C
Z
~ `r
Z
Z 634
..
635
..
..
0
3 c
.._
0
3 c
:_.
0
3 c
..
630
4-
632
c
630
c
a>i
c
2 pc
-f
2
LU
630
2
J
J 625
L 625
L
L 628
R
3
1
3
1
M
3
1
620
I
626
620
0
624
0
0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1 /2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
Date
AB-24S Water Elevation (NAVD 88)
- AB-25S Water Elevation (NAVD 88)
AB-24SL Water Elevation (NAVD 88)
AB-25SL Water Elevation (NAVD 88)
AB-27S Water Elevation (NAVD 88)
AB-24D Water Elevation (NAVD 88)
AB-25SS Water Elevation (NAVD 88)
— AB-24BR Water Elevation (NAVD 88)
— AB-25BRU Water Elevation (NAVD 88)
AB-28S
AB-29 Cluster
AB-30S
619 5
640
5
614
5
00 639
00
4
00
00
4
4
a 612
V Y' ,4..�
618
a
z
z
I
'u
638
z
0
3`c-,
0
3 v
o
�y�,
"
3�
+'
d 637
—
c
+1 610
—
c
v 617
tiry
W
W
c
2 oC
;
2 cd
v
2 o�G
6 36
608
L
L
J
y 616
635
606
'
II �� ,
634
_III
0
0
4/1/2019 5/1/2019 6/1/2019 7/1/2019' 8/1/2019 9/1/2019
615 0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
AB-29S Water Elevation (NAVD 88)
Date
AB-28S Water Elevation (NAVD 88)
AB-29SL Water Elevation (NAVD 88)
AB-29SS Water Elevation (NAVD 88)
AB-30S Water Elevation (NAVD 88)
LEGEND Notes:
Ash Pore Water
(� DUKE
DRAWN BY: D. AVARD DATE: 10/31/2019
FIGURE 6-17c
NAVD 88 - North
Decanting Start (06/05/2019) Lower Ash Pore Water American Vertical Datum
s ENERGY
ENERGY
REVISED BY:
CHECKED BY: L.DRAGO
HYDROGRAPHS — SIDEGRADIENT AND
Daily Rainfall Total (inches) Shallow Flow Zone 1988
CAROLINAS
APPROVED BY: L. DRAGO
NORTHERN ASH BASIN
in - inches
Deep Flow Zone
PROJECT MANAGER: C. SUTTELL
CORRECTIVE ACTION PLAN UPDATE
See Figure 6-16 for
�'
Bedrock Flow Zone monitoring locations
ALLEN STEAM STATION
synTerra
BELMONT, NORTH CAROLINA
www.synterracorp.com

Ash Basin Pond
Ash Basin Fingers Monitoring
Southwestern Pond
659 5
660 5
640
5
00
00 635
4
00
4
Go
00658
4
> 658
a
a
a
z
z
z
o 630
3
0
3 v
c 656
3
>
> 657
>
c
c
c
LU a@ 625
2 cc
w 640
2 IY
—y 654
2 W
>
1
N
—�'
w
J
J
J
a`7
a`7 632
3 620
1
3
1
3 652
1
624
I I
0615
0650
6/1/2019 7/1/2019 8/1/2019/1/2019
5/25/2019 6/1
Date
Date
Date
Southwestern Pond Water Elevation (NAVD 88)
Southwestern Pond Level Elevation (NAVD 88)
Ash Basin Pond Level Elevation (NAVD 88)
Primary Pond 1 Water Elevation (NAVD 88)
Primary Pond 2 Water Elevation (NAVD 88)
Primary Pond 3 Water Elevation (NAVD 88)
Primary Pond 1
Primary Pond 2
Primary Pond 3
640 5
640
5
638
5
00
00
00
00
> 635
4
> 639
4
4
z
z
a
z
c
5
c
5
637
630
3
+ 638
3 =
3 V
c
c
y
c
625
cc
2
d 637
ce
2
>
2
L
L
J 636
+�
M
3 620
1
M
3 636
1
3
1
615
0
635
0
635 0
6/1/2019 7/1/2019 8/1/2019 9/1/2019
6/1/2019 7/1/2019 8/1/2019 9/1/2019
6/1/2019 7/1/2019 8/1/2019 9/1/2019
Date
Date
Date
Primary Pond 1 Level Elevation (NAVD 88)
AB-29S Water Elevation (NAVD 88)
Primary Pond 3 Water Elevation (NAVD 88)
Notes:
LEGEND Ponded Ash Basin NAVD 88 North
17
r DUKE
DRAWN BY: D.AVARD DATE:10/31/2019
REVISED BY:
FIGURE 6-17d
-
Decanting Start (06/05/2019) Ash Basin Finger Surface Water American Vertical Datum
ENERGY
CHECKED BY: L.DRAGO
HYDROGRAPHS — SURFACE WATER
Daily Rainfall Total (inches) Ash Basin Finger Surface Water 1988
CAROLIhtAS
APPROVED BY: L. DRAGO
CORRECTIVE ACTION PLAN UPDATE
Ash Basin Finger Surface Water in - inches
See Figure 6-16 for
PROJECT MANAGER: C. SUTTELL
ALLEN STEAM STATION
Ash Basin Finger Surface Water monitoring locations
%
BELMONT, NORTH CAROLINA
synTena
www.synterracorp.com

AB-32 Cluster
AB-33 Cluster
CCR-4 Cluster
584
600
606
00
00 580
� "
00
00
596
00
00
p
6e+5
C
6e+5
p
6e+5
Q
Q
Q 600
Z 576
'a
Z
'o
Z
'a
c
c 592
c
o
O
y
O
> 572
4e+
N
4e+5
594
4e+5
N
c
W
c
(V
c
W
O
W 58$
O
W
O
a� 568 -
M
W
M
>
J
>
(7
>
J 588
(7
J
+; 564
2e+5
y 584
2e+5
a)2e+5
3
3
3
560
582
580
0
0
0
1/1/18
2/1/18 3/1/18 4/1/18 5/1/18 6/1/18 7/1/18
1/1/18 2/1/18
3/1/18 4/1/18 5/1/18 6/1/18
7/1/18
1/1/18
2/1/18 3/1/18 4/1/18 5/1/18 6/1/18 7/1/18
Date
Date
Date
AB-32S Water Elevation (NAVD 88)
AB-33S Water Elevation (NAVD 88)
CCR-4SA Water Elevation (NAVD 88)
AB-32D Water Elevation (NAVD 88)
AB-33D Water Elevation (NAVD 88)
CCR-4DA Water Elevation (NAVD 88)
CCR-5 Cluster
CCR-6 Cluster
CCR-7 Cluster
597
592
588
596
00
00
00
°D
> 595
6e+5
00
> 591
11
6e+5
00
> 586
6e+5
Q
Q
Q
Z
Z
Z
594
o
o
y
o
> 593
4e+5 c
>>i 590
4e+5
> 584
4e+5
6
I
c
W
O
W
O
W
O
ai
m
w 4 �. --
>
11 -. """"..r
M
(7
N
>
i6
c7
a>i
J 4
J
J
2e+5
V
2e+5
+) 582
2e+5
3
3 2
3
2
p
p
580
0
0 0
1/1/18
2/1/18 3/1/18 4/1/18 5/1/18 6/1/18
7/1/18
1/1/18 2/1/18
3/1/18 4/1/1 5/1/18 6/1/18
7/1/18
1/1/18
2/1/18 3/1/18 4/1/18 5/1/18 6/1/18 7/1/18
Date
Da a
Date
CCR-5S Water Elevation'
CCR-6S Water Elevation'
CCR-7S Water Elevation (NAVD 88)
CCR-5D Water Elevation (NAVD 88)
CCR-6D Water Elevation (NAVD 88)
CCR-7D Water Elevation (NAVD 88)
LEGEND
Notes:
/DUKE
DRAWN BY: D. AVARD
DATE: 10/31/2019
FIGURE -1Ha
NAVD 88 -
North American
Vertical Datum
� ENERGY,
REVISED BY:
1988
CHECKED BY: L.DRAGO
HYDROGRAPHS — HOLDING BASIN
Shallow Flow Zone
in - inches
CAROLINAS
APPROVED BY: L.DRAGO
CORRECTIVE ACTION PLAN UPDATE
Deep Flow Zone
1 - Water level
elevation.
not corrected to NAVD 88
PROJECT MANAGER: C. SUTTELL
ALLEN STEAM STATION
�%
Bedrock Flow Zone
BELMONT, NORTH CAROLINA
synTena
www.synterracorp.com

CCR -8 Cluster
CCR-9 Cluster
GWA-5 Cluster
602
570
579
569
00
00
00 600
00
>
6e+5
> 568
6e+5
>
6e+5
576-"'�"
z
.a
z 567
a
z 598
a
0
573
0 566
y
o
y
>
4e+5 y
> 565
4e+5
> 596
4e+5 N
572
W
570
O
w 3
O
W
O
y
y 568
J
y
J
2
J
567
2e+5
II
�Ir
12e+5
564
2e+5
3
3
3
ilio 6,190
1
560
564
0
0
556
0
1/1/18
2/1/18 3/1/18 4/1/18 5/1/18 6/1/18 7/1/18
1/1/18 2/1/18 3/1/18 4/1/18 5/1/18 6/1/18
7/1/18
1/1/18
2/1/18 3/1/18 4/1/18 5/1/18 6/1/18 7/1/18
Date
Date
Date
CCR-8S Water Elevation (NAVD 88)
CCR-9S Water Elevation'
GWA-5S Water Elevation (NAVD 88)
CCR-8D Water Elevation (NAVD 88)
CCR-9D Water Elevation (NAVD 88)
GWA-5D Water Elevation (NAVD 88)
GWA-5BRA Water Elevation (NAVD 88)
GWA-6 Cluster
GWA-7 Cluster
614
584
00
W
-
p
6e+5
p 582
6e+5
>
613
>
Q
Q
z
z
M
580
;;
o
y
o
W
>
612
4e+5 y
> 578
4e+5
W
O
W
II 1
> 576
>
f°
a>i
J
J
ai
594
2e+5
+, 574
2e+5
3
3
591
572
588
0
570 0
1/1/18 2/1/18 3/1/18 6//114118 5/1/18 6/1/18 7/1/18
1/1/18 2/1/18 3/1/18 41/ate 5/1/18 6/1/18 7/1/18
GWA-6S Water Elevation (NAVD 88)
GWA-7S Water Elevation (NAVD 88)
GWA-6DA Water Elevation (NAVD 88)
GWA-7D Water Elevation (NAVD 88)
GWA-6BRA Water Elevation (NAVD 88)
LEGEND
Notes:
/DUKE
DRAWN BY: D. AVARD
DATE: 10/31/2019
FIGURE -18b
NAVD 88 - North American
Vertical Datum
� ENERGY,
REVISED BY:
1988
CHECKED BY: L.DRAGO
HYDROGRAPHS — HOLDING BASIN
Shallow Flow Zone
in - inches
CAROLIhEAS
APPROVED BY:
CORRECTIVE ACTION PLAN UPDATE
Deep Flow Zone
1 -water level not corrected to NAVD 88
elevation.
PROJECT MANAGER:C.SUTTELL
ALLEN STEAM STATION
�%
Bedrock Flow Zone
BELMONT, NORTH CAROLINA
WnTena
www.,ynterracorp.com

IDE�
RETIRED
�-► �•�— ASH BASIN
- , I
1
I ,
. v
o
�-660
. o
3p /
PRIMARY
POND 1
v
ALLEN STATION WATER
STEAM INTAKE STRUCTURE
STATION
i
ACTIVE
ASH BASIN
rM
I
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/2019
DATE: 12/20/2019
DATE: 12/20/2019
APPROVED BY: L. DRAGO
DATE: 12/20/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SLITTELL
ww,,.s nterracor .com
LEGEND
NOT
FIGURE 6-19a
ISOCONCENTRATION MAP
BORON IN SHALLOW FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

"—i ----�
/
90 I ♦ '
5 I
� I •
0
ON
M 10
EE
6�
ASH
STORAGE -
J I� J
J
■ASH C J
STORAGE h J
ti
IRED U
SSA_ SS" �l `
i
PRIMARY
POND 1
v�
688
❑U
' 00
D
o
y
❑ Ni
t
425 0 425 850
• ' DUKE
ENERGY GRAPHIC SCALE IN FEET
CAROLINAS DRAWN BY: C. DAVIS DATE: 06/12/2019
REVISED BY: J. KIRTZ DATE: 12/20/2019
a 80 APPROVED BY: L. DRAGO DATE: 12/20/2019
20 DATE: 12/20/2019
0 CHECKED BY: L. DRAGO
s,
synTerra PROGRAM MANAGER: C. SUTTELL
o www.s nterracor .com
Nj
0
NOTE
FIGURE 6-19b
ISOCONCENTRATION MAP
BORON IN DEEP FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

H
U
r-1
■ BG-4BR
<50
6g0
,�..�. � sao •
■
O ,
s• CCR-266R GWA-296R
s7o
<50*
<50 GWA-28BR
21j
GWA-6BRA
50
• • > GWA-6BRL •'
<50 4 I 75
• '♦ r' � � i CP-66R
AB-38BR ♦ soo - — - 47
D <50 •. 1
• • • GWA-51D
♦ 1 656
PA
?, • , .�
" " " • 1 I GWA-5BRA
• - • • • • • y GWA-5BRL 736
® _ 43
AB-35BR . ' GWA-4BR
. - "'''• • <50 1 . GWA-4BRL 380
206
AB-146R ' I� ■
�. <50 ■
30 • • �/s AB-27BR m f
I � � �.1 • • 142 •
•
i
1
GWA-21BR _ •'• • .• •
<5o AB-25BR GWA-3BRA • ' AB-246R GWA-36RL
� <50 <50 85 <50
AB-4BR a 1
<50
650 CCR-16D 1 CCR-16BR
% } / � sao� 604 479
/ CCR-17D �,
/ 1520
/ <50
AB-22BR
GWA-96R AB-21BRL AB-21BR 1834 ♦ A
<50 �� <50 <50
AB-226RL
1948
Q 1
0
\ 660
Sv O I
-` GWA-1BR ♦�
\ ■ a <50 ■ ►
I �■
BG-1 BR37
m S�
106R
10BRL
420
DUKE
ENERGY
CAROLINAS
LEGEND
ASSESSMENT MONITORING WELL - GREATER THAN 15A
NCAC 2L .0202 STANDARD (700 Ng/L) (EFFECTIVE DATE
FOR 15A NCAC 02L .0202 STANDARD IS APRIL 1. 2013)
ASSESSMENT MONITORING WELL - GREATER THAN
CONSTITUENT BACKGROUND THRESHOLD VALUE (50
Ng/L)
ASSESSMENT MONITORING WELL - LESS THAN
BACKGROUND THRESHOLD VALUE
BACKGROUND MONITORING WELL
ISOLATED EXCEEDANCE OF BACKGROUND
BORON PLUME GREATER THAN INC 02L STANDARD
(700 Ng/L) FROM MEAN ANALYSIS. FLOW AND
TRANSPORT MODEL PREDICTED PLUME IS USED WHERE
EMPIRICAL DATA IS NOT AVAILABLE.
BORON PLUME GREATER THAN BTV (50 Ng/L) FROM
MEAN ANALYSIS. FLOW AND TRANSPORT PREDICTED
PLUME IS USED WHERE EMPIRICAL DATA IS NOT
AVAILABLE.
ACTIVE ASH BASIN WASTE BOUNDARY
— - — - — ASH BASIN COMPLIANCE BOUNDARY
— - — - — RETIRED ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
DORS FILLS BOUNDARIES
- - DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (10' INTERVAL)
STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
APPROXIMATE HYDROLOGIC DIVIDE
GROUNDWATER FLOW DIRECTION
SURFACE WATER FLOW DIRECTION
NOTES:
1. DATA INCLUDED IN THIS FIGUREARE 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 DATASETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L FOR BORON IS 700 pg/L.
3. THE BACKGROUND VALUE FOR BORON IS 50 pg/L (AS SUBMITTED JUNE 2019).
4. * - CONSTITUENT CONCENTRATION SHOWN IS THE MOST RECENT VALID SAMPLE
AVAILABLE.
5. GROUNDWATER FLOW AND TRANSPORT BORON PLUME SIMULATION IS MODIFIED
FROM MODEL LAYER 17 (MURDOCH AND OTHERS, 2019; MODEL OUTPUT PRODUCED
OCTOBER 2019).
6. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018)AND UPDATED
GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (MURDOCH AND OTHERS,
2019).
7. 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& INFRASTRUCTURE, INC. NATURAL
RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED MAY 29, 2015.
8. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLYAND 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
https:gsdd.nc.gov/sdd/DataDownload.aspx.
9. ALL BOUNDARIES ARE APPROXIMATE.
10. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
11. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
12. DRAWING HAS BEEN SET WITH PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
ate o 42e seo
FIGURE 6-19C
GRAPHIC SCALE IN FEET
ISOCONCENTRATION MAP
DRAWN BY: C. DAVIS DATE: 06/12/2019
BORON IN BEDROCK FLOW ZONE
DATE: 12/20/2019
REVISEDBY:BY: KIRTZL.
CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L. DRAGO DATE: 12/20/2019
CHECKED BY: L. DRAGO DATE: 12/20/2019
ALLEN STEAM STATION
PROGRAM MANAGER: C. SUTTELL
BELMONT, NORTH CAROLINA
www.synterracorp.com

-
--,,—i r - --
R
11
■
r-
♦ S80 � I �
S'90
LEGEND
/V,q ALLEN STATION WATER
STEAM INTAKE STRUCTURE
- STATION
•I - •I •h
I
LIVE
�- I •I • ■ COAL
■ PILE
•I
1 •� I I I • HOLDING
ASH •I I BASIN
STORAGE � ♦• ■
I I
I
� J �I •• • .11 •I •I •I I
i
ASH y
NOTES:
b
�— 640
1
ACTIVE
ASH BASIN
0 ■
• 'DUKE 425 O 425 850 FIGURE 6-2Oa
' ENERGY ISOCONCENTRATION MAP
GRAPHIC SCALE IN FEET
♦ CAROLINAS
♦ DRAWN BY: C.DAVIS DATE:06/12/2019 SULFATE IN SHALLOW FLOW ZONE
,♦ ♦ Z REVISED BY: J. KIRTZ DATE: 12/20/2019
• APPROVED BY: L. DRAGO DATE: 12/20/2019 CORRECTIVE ACTION PLAN UPDATE
600 CHECKED BY: L. DRAGO 2DATE: 12/20/2019 ALLEN STEAM STATION
synTerrd PROGRAM MANAGER: C. SL17ELL
s,
BELMONT, NORTH CAROLINA
www.s nterracor .com

[I
s�
0
I
I
l�
. 0%
•
ALLEN
STEAM STATION WATER
STATION INTAKE STRUCTURE
- ,, ■ ■ LIVE
�, ■ ♦♦ �, COAL
PILE
'♦ ,, ,' coal
PILE HOLDING
BASIN
J �
IM
PRIMARY
POND 1
.04
630
l
o ) A f//.'
.
61V—`
' \ /\
'DUKE
ENERGY
CAROLINAS
425 0 425 850
GRAPHIC SCALE IN FEET
DRAWN BY: C. DAVIS DATE: 06/12/201;
BY: J. KIRTZ DATE: 12/20/2019
DATE: 12/20/2019
APPROVED BY: L. DRAGO DATE: 12/20/2019
CHECKED BY: L. DRAGO
PROGRAM MANAGER: C. SLITTELL
J� 1pREVISED
synTerra
ww,,.s nterracor .com
LEGEND
NOTES:
FIGURE 6-20b
ISOCONCENTRATION MAP
SULFATE IN DEEP FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

13
PRIMARY
POND 1
ALLEN
STEAM STATION WATER
STATION /NTAKE STRUCTURE
i
I
O
LIVE
COAL
PILE
■
PILE HOLDING
BASIN
i
600
RETIRED ASH BASIN
ASH LANDFILL '�
CA
PRIMARY PRIMARY (I
POND 2 POND 3
-� ACTIVE
IASH BASIN
a,
o
o �
o ♦
I r
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/2019
DATE: 12/20/2019
DATE: 12/20/2019
APPROVED BY: L. DRAGO
DATE: 12/20/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SLITTELL
www.synterracorp.com
LEGEND
NOTES:
FIGURE 6-20c
ISOCONCENTRATION MAP
SULFATE IN BEDROCK FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

1
ALLEN
STEAM
STATION
I
•r I
/ ��\-a• T
r �
r •
■ - •r -a ASH
• STORAG •
r
�r
< r •
� r / .6M' �r� '� •r
J
� STORAGE h 12 ��
r RETIRED
APPROXIMATE ► "•►- ASH BASIN � l`l � I Ll
HYDROLOGIC DIVID
r ■ h
r •r
■ LIVE
• COAL
r PILE
r
r
I •r
RETIRED ASH BASIN -
I ASH LANDFILL - •
■
r
�! PRIMARY PRIMARY
- POND 2 POND 3
' PRIMARY
• POND 1 -
r
S'90
r
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/201;
DATE: 12/20/2019
DATE: 12/20/2019
APPROVED BY: L. DRAGO
DATE: 12/20/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SLITTELL
www.svnterracorp.com
LEGEND
NOTES:
FIGURE 6-21a
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS
IN SHALLOW FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

LEGEND
(—,--,690
- r 640 630
l
I O 660
- '670 �
•'' l ❑ ❑ ..
0 �
y� 44 I 600
❑ ---
w
PROXIA - 1 1 I I❑ t I_ d NOTES:
IIATE
MUM
•• I
650
;' • 40
� . 66
('DUKE 425 o 425 seo FIGURE6-21b
ENERGY GRAPHIC SCALE IN FEET ISOCONCENTRATION MAP
CAROLINAS TOTAL DISSOLVED SOLIDS
DRAWN BY: C. DAVIS DATE: 06/12/2019
REVISED BY: J.KIRTZ DATE:12/20/2019 IN DEEP FLOW ZONE
.o DATE: 12/20/2019
APPROVED BY: L. DRAGO CORRECTIVE ACTION PLAN UPDATE
600 62 ' CHECKED BY: L.DRAGO DATE:12/20/2019 ALLEN STEAM STATION
synT�rra
°� PROGRAM MANAGER: C. SUTTELL BELMONT, NORTH CAROLINA
s�
www.s nterracor .com

LI
v
0`SG�p,R
_ ••
ASH
HOLDING
/ •� ' STORAGE BASIN
J
ASH j RETIRED ASH BASIN
STORAGE ASH LANDFILL - -
., h II
MATE RETIRED
C DIVIDE ASH BASIN S
ti
PRIMARY PRIMARY
POND 2 POND 3 i
PRIMARY
• POND 1
160 =
EE.
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/201;
DATE: 12/20/2019
DATE: 12/20/2019
1p
APPROVED BY: L. DRAGO
DATE: 12/20/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SLITTELL
www.svnterracorp.com
LEGEND
NOTES:
A
FIGURE 6-21c
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS
IN BEDROCK FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

■ _• 11
I
�♦ J
J
i
J
AS
SFI J TORAGE
�� ti I RETIRED,
'XIMATE 1 ,� RETIRED � 111 A�_SH L�
GIC DIVIDE' �► ���— "ASH BASIN
PRIMARY
- PRIMARY POND 2
� POND 1
i
i
I`
ALLEN STATION WATER
STEAM INTAKE STRUCTURE
STATION
■ '� �■ c'
WON
LEGEND
7-
NOTE
o
660
o •
• 00
. 420 o 420 sao FIGURE 6-22a
' DUKE
ENERGY GRAPHIC SCALE IN FEET ISOCONCENTRATION MAP
CAROLINAS
DRAWN BY: C. DAVIS DATE: 06/12/2019 STRONTIUM IN SHALLOW FLOW ZONE
�9 ,� • 7 / REVISED BY: J. KIRTZ DATE: 12/17/2019
APPROV/ _ oL. DATE: 12/17/2019 CORRECTIVE ACTION PLAN UPDATE
6 CHECKED DRAG
ALLEN STEAM STATION
600� .62 DATE: 12/17/2019
CHECKED BY: L. DRAGO
synTerrd PROGRAM MANAGER:C.SUTTELL BELMONT, NORTH CAROLINA
www.s nterracor .com

S�
� a
r-
\
C
�- ASH RETIRt
STORAGE h ASh
�- ASH RETIRED U
_ Jr
ti
PRIMARY
PRIMARY POND 2
,- POND 1
i
�f
: �Wp�,
.
ALLEN
STEAM STATION WATER
STATION INTAKE STRUCTURE
rrr SH BBASIAST -
N
JDFILL
IMARY
)ND 3 ,(
RON
DUKE
ENERGY
CAROLINAS
10
synTerr
LEGEND
•
NOTE
FIGURE 6-22b
GRAPHIC SCALE IN FEET
ISOCONCENTRATION MAP
DRAWN BY: C. DAVIS
DATE: 06/12/2019
STRONTIUM IN DEEP FLOW ZONE
REVISEDBY:BY: KIRTZL.
DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L. DRAGO
DATE: 12/17/2019
DATE: 12/17/2019
ALLEN STEAM STATION
CHECKED BY: L. DRAGO
PROGRAM MANAGER: C. SL17ELL
BELMONT, NORTH CAROLINA
www.sy7terracorp.com —71

z
�a
` STEAM ALLEN
STATION WATER
STATION INTAKE STRUCTURE
i
LIVE
COAL
PILE
�- ASH'/ �� PILE HOLDING
STORAGE it BASIN
I I
J J
Q
ASH y RETIREDASHBASIN ,
�. STORAGE ASH LANDFILL
�- RETIRED ,I
ASH BASIN
APPROXIMATE ' — —
HYDROLOGIC DIVIDE
1
ti I CATAWBA RI
PRIMARY PRIMARY ( (LAKE WYL
POND 2 POND 3
PRIMARY
I
POND 1 _
I
INN
DUKE
CAROLINAS
(-
ACTIVE
�� ASH BASIN
r
LEGEND
v
U
NOTE
425 o 425 Sao FIGURE 6-22C
GRAPHIC SCALE IN FEET ISOCONCENTRATION MAP
DRAWN BY: C. DAVIS DATE: 06/12/2019 STRONTIUM IN BEDROCK FLOW ZONE
REVISEDBY:BY: KIRTZL.
DATE: 12/17/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L. DRAGO DATE: 12/17/2019
CHECKED BY: L. DRAGO DATE: 12/17/2019 ALLEN STEAM STATION
PROGRAM MANAGER: C. SL17ELL BELMONT, NORTH CAROLINA
www.synterracorD.com —71

F�I
• _,��� STORAGE I �-i
J
J
ASH RETIRED ASH BAS
STORAGE h R ASH LANDFILL
4TE
DIVIDE , RETIRED , j -
>— ASH BASIN
�l h
�r
L
PRIMARY
PRIMARY
- POND 2 POND 3
� PRIMARY
i
,- POND 1 -
i
■ i
LEGEND
NOTE
o ,
66
� � I
00
\ i . ■ ■ ey
■ 425 0 425 850
■ 68 0 �' DUKE FIGURE 6-23a
I ENERGY GRAPHIC SCALE IN FEET ISOCONCENTRATION MAP
■ CAROLINAS DRAWN BY: C.DAVIS DATE:06/12/2019 COBALT IN SHALLOW FLOW ZONE
■ �096 \ REVISED BY: J. KIRTZ DATE: 12/17/2019
' eZ DATE: 12/17/2019 CORRECTIVE ACTION PLAN UPDATE
/ mo APPROVED BY: L. DRAGO DATE: 12/17/2019
CHECKED BY: L. DRAGO ALLEN STEAM STATION
S, I\ WnTerra PROGRAM MANAGER: C. SL17ELL BELMONT, NORTH CAROLINA
www.synterracorp.com

,z.' !
S'90
SSG
■r ,r ASH r
�r STORAGE
r
r A
r A• ~
- ASH RETIE
- STORAGE h J AS
A
,r r •�_ RETIRED
SH BASIN ie
APPROXIMATE
HYDROLOGIC DIVIDE I -
L �
r
PRIMARY
_ PRIMARY POND 2
POND 1
i
r r
I��illl
a
� asI
r
r
ALLEN
STEAM STATION WATER
STATION INTAKE STRUCTURE
■ �r
• `
DUKE
ENERGY
CAROLINAS
10
synTerr
LEGEND
NOTES:
425 ° 425 850 FIGURE 6-23b
GRAPHIC SCALE IN FEET ISOCONCENTRATION MAP
DRAWN BY: C. DAVIS DATE: 06/12/2019 COBALT IN DEEP FLOW ZONE
REVISEDBY:BY: KIRTZL.
DATE: 12/17/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: L. DRAGO DATE: 12/17/2019
CHECKED BY: L. DRAGO DATE: 12/17/2019 ALLEN STEAM STATION
PROGRAM MANAGER: C. SL17ELL BELMONT, NORTH CAROLINA
www.synterracorp.com

h�
III �` ALLEN
STEAM STATION WATER
STATION INTAKE STRUCTURE
PRG
I
p- COAL
ASH PILE HOLDING
�STORAGE BASIN
I
ASH RETIRED ASH BASIN
� STORAGE h ASH LANDFILL
APPROXIMATE
1 HYDROLOGIC DIVIDE \ RETIRED _
ASH BASIN �
L
PRIMARY PRIMARY ( I
PRIMARY POND 2 POND 3
POND I
t
S'90
� a
Q
425 0 425 850
•'' ' DUKE
ENERGY GRAPHIC SCALE IN FEET
CAROLlNAS DRAWN BY: C. DAVIS DATE: 06/12/2019
REVISED BY: J. KIRTZ DATE: 12/17/2019
DATE: 12/17/2019
\�610 APPROVED BY: L. DRAGO
CHECKED BY: L. DRAGRAGO DATE: 12/17/2019
s, synTerra PROGRAM MANAGER: C. SLITTELL
www.s nterracor .COM
LEGEND
`D
NOTE
FIGURE 6-23c
ISOCONCENTRATION MAP
COBALT IN BEDROCK FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

' BG-4S
e40
�'+ I 620� ( — GWA-29S j
• ` BG-3S • �/ v 400 ,
323 .
580.
CCR-26S GWA-28S ' CP-3S
S' 45575 386 1061
■ �67 `
� CP-2S
GWA-8S GWA-27S ■ GWA-7S `� CP 2 5970 CP-4S
148IM
GWA-17S ♦0 217 CP-1S •'
148 AB 1R ♦ CCR-3S ` ♦ 32733
LEGEND
5�0 • 97 + CC -is CCR-2S Nq GWA-6S ♦ GWA-30S CP-5S 0 ASSESSMENT MONITORING WELL
r - - ■ N A
• ��e50-- -INA 2720
- � B7 : ■ 4544
�♦ 0 BACKGROUND MONITORING WELL
BG-2S . •• • CCR-4SAI CCR-5S • ♦ • '
ISOLATED EXCEEDANCE OF BACKGROUND
♦ 199 ' �•, ♦ j, GWA-18S ® AB-41SS NA I NA AB-4 SS CCR-7S CP-6S — •— IRON - INFERRED BACKGROUND CONTOUR
•� 763++ I 393 ` 41200 NA ` AB-38SS 4517 CCR-9S ACTIVE ASH BASIN WASTE BOUNDARY
_
l ■ 356 AB-44SS o0
se GWA-16S ■ NA
228 CCR-BG-1S 306 — - — - - CCR-8S GW
ASH BASIN COMPLIANCE BOUNDARY
a
• , ; �• NA CCR-6S NA 41250 RETIRED ASH BASIN WASTE BOUNDARY
/ ., ♦ NA — - — - AB-32S RETIRED ASH BASIN ASH LANDFILL WASTE
GWA-19S AB-33SS 39240
250 B-42SS ■ CCR-11S BOUNDARY
•
� 278 814 1 NA RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
■ ■ �`, , , _ AB-31S I BOUNDARY
GWA-15S ' 447 ■' DORS FILLS BOUNDARIES
GWA-4S
M� • . • • 2` . ♦ ' ■ AB-35PWS 48 43SS ; 505 - - DUKE ENERGY CAROLINAS PROPERTY LINE
292 AB-29SS : AB-9S TOPOGRAPHIC CONTOUR (10' INTERVAL)
��� 135 1Sosz
GWA-14S AB-2 STREAM (AMEC NRTR 2015)
91 96
WETLAND (AMEC NRTR 2015)
GWA-22S APPROXIMATE HYDROLOGIC DIVIDE
246 'CCR-14S
r NA GROUNDWATER FLOW DIRECTION
.• `� D (
GWA-21S SURFACE WATER FLOW DIRECTION
�
97 AB-13S --• • AB-25SS AB-26S ' NOTES:
57 107 743 �I 1. DATA INCLUDED IN THIS FIGURE ARE THE MEAN OR GEOMEAN RESULTS FOR WELLS
r BASED ON THE CENTRAL TENDENCY OF THE DATA SET FROM SAMPLES BETWEEN
1 - GWA-3S JANUARY 2018 AND JUNE 2019. FOR WELLS WITH DATASETS CONTAINING FEWER THAN
7092
1 FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
AB-4S 2. THE 02L FOR IRON IS 300 pg/L.
622 GWA-23S CCR-16S 3. THE BACKGROUND VALUE FOR IRON IS 1422 pg/L (AS SUBMITTED JUNE 2019).
95 NAIF 4. NA- NOT AVAILABLE.
_ eao
5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018) AND UPDATED
CCR-17S GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (MURDOCH AND OTHERS,
2019
NA 6. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY
GWA-9S AB-22Sjj� CORPS OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS NOT TO BE
GWA 84SA 156 1675 AB-10S USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND
96 STREAMS BOUNDARIES WERE OBTAINED FROM STREAM AND WETLAND DELINEATION
BY AMEC FOSTER HEELER ENVIRONMENTAL & INFRASTRUCTURE, INC.
AB-21 SS NAATURALTED RESO RESOURCE TECHNICAL 'REPORT (NRTR) FOR ALLEN STEAM STATION DATED
172 MAY 29, 2015.
AB-6R 5B-6A 7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLY AND SHOULD NOT
BE USED FOR DESIGN OR ENGINEERING PURPOSES. TOPOGRAPHY IS BASED ON LIDAR
CCR-21S 100 CCR-18S BARE EARTH DATA OBTAINED FROM THE NORTH CAROLINA SPATIAL DATA SITE AT
https://sdd.nc.gov/sdd/DataDownload.aspx.
AB-12S NA CCR- 0S NA 8. ALL BOUNDARIES ARE APPROXIMATE.
NA
` 265 AB 5 9. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
66
10. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11,
` L -tom -' r 512 CCR-22S 2017. AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
65A-26S ■,,♦ ■ NA Q 85 A-2S • 11. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINASTATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
J� ■ .. CCR-23S GWA-1S 10
i NA 86 ■ 425 o 425 850
DUKE FIGURE 6-24a
IBG-1S .• ENERGY GRAPHIC SCALE IN FEET ISOCONCENTRATION MAP
334 • CAROLINAS
r ♦ DRAWN BY: C.DAVIS DATE:06/12/2019 IRON IN SHALLOW FLOW ZONE
' 69 ,♦ • �°° REVISED BY: J. KIRTZ DATE: 12/17/2019
g3 _ ■ _ c ° 'O ' APPROVED BY: L.DRAGO DATE: 12/17/2019 CORRECTIVE ACTION PLAN UPDATE
CHECKED BY: L. DRAGO DATE: 12/17/2019 ALLEN STEAM STATION
synTerra TTPROGRAM MANAGER: BELMONT, NORTH CAROLINA
www.synterracorp.com

\ B 03D '
■ �� ez '676 - GWA-27D
• GWA-8D 942
• 177 CCR-4DA
♦ GWA-17D ♦�� NA
■ 459
CCR-3DA
' CCR-1 DA CCR-2D NA
GWA-18D NA r NA 67 6s —
BG-2D ■ ■■ ♦ - - ♦ _
144 .�■ AB-38D AB-39D AB
159 58
♦ ss GWA-16D ' • AB-44D
• 165 • 479
/ • � - NA
• GWA-19D AB-43D
55 167
• I � I
AB-37D , AB-36D
GWA-15D 82 133 • - • i I i
<50
" " " • A13-35D
AB-14D <50
125
s�
■� GWA-14DA , 73
<50 w �
GW
317
1
GWA-21 DA
187 AB-1
129
AB-4D
103 GWA-2
• 63
GW2444D GV1649D AB-20D
AB-12D o
- 86
� 660
GWA-H11 r - .
I�
BG-1DA o
68
� 690
0
s'
■
,J
76 GWA-28D �I� 3190
734
GWA-7D 1 CP-2D
89
COAL
Ir
PILE
HOLDING
BASIN
1
WE 0
I RETIRED ASH BASIN
ASH LANDFILL I
,
I
70
r
PRIMARY
POND 2
PRIMARY
POND 1
CCR-23D
NA
♦ AB-11 D
/ 87
D
I
AB-.
337
33
f57
CR-18D
INMIN
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/201;
DATE: 12/17/2019
DATE: 12/17/2019
APPROVED BY: L. DRAGO
DATE: 12/17/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SUTTELL
WWW.s ntelracor .com
LEGEND
ASSESSMENT MONITORING WELL
BACKGROUND MONITORING WELL
ISOLATED EXCEEDANCE OF BACKGROUND
— IRON - INFERRED BACKGROUND CONTOUR
ACTIVE ASH BASIN WASTE BOUNDARY
- - - - - - ASH BASIN COMPLIANCE BOUNDARY
- - - - - RETIRED ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE
BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
DORS FILLS BOUNDARIES
DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (10' INTERVAL)
STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
APPROXIMATE HYDROLOGIC DIVIDE
GROUNDWATER FLOW DIRECTION
SURFACE WATER FLOW 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 DATASETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L FOR IRON IS 300 pg/L.
3. THE BACKGROUND VALUE FOR IRON IS 665 pg/L (AS SUBMITTED JUNE 2019).
4. NA - NOT AVAILABLE.
5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018) AND UPDATED
GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (MURDOCH AND OTHERS,
2019).
6. 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& INFRASTRUCTURE, INC.
NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED
MAY 29, 2015.
7. 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
https://sdd.nc.gov/sdd/DataDownload.aspx.
8. ALL BOUNDARIES ARE APPROXIMATE.
9. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
10. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11,
2017. AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
11. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 6-24b
ISOCONCENTRATION MAP
IRON IN DEEP FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

3
s�
ALLEN STATION WATER
PEN STEAM INTAKE STRUCTURE
� STATION
GW45200
21
� GWA-8S
GWA-17S ♦ 19 CAR-4SA 1
� • NA
10
• AB-1R CCR-IS CCR-3S
_ 7 • NA CCR-2S NA
r NA
• _
+ � AB-41 SS
j GWA-18Se y J 393000
• i 77 AB-AB-44SS
Y . ` . % • 16738SS 4800
CCR-BG-1S �* 1
NA
■ ) I
�.0
�.�10
GWA-15S '
25
AB-35PWS
•��` • 101
'.
GWA-14S AB-2 •��,
24 � 34
1 GWA-22S • "
In 521
1
8WA-21 S
AE
66
66
s '!v l
AB-12S
./ 49 77
�sso�
O
GWA-26S
`14
11\/r_ •
BG-1S .�
� y0
�6
PRIMARY
POND 1
1100
AP-2S'
AP-4S
2960 j3400
♦ CP-1S
5133
GWA-30S CP-5S
;WA-6S WA-6S • 23700 5523
131200
,. . .
CCR-5S CCR-7S
NA CP-6S
NA 2790
coo CCR-S
CR-8S NA
0
kB-40SS NA GWA-5S
7400 AB-33SS 5804
- 717 AB-32S
6014
3-42SS CCR-6S `1 CCR-11S
i1 NA NA
PRIMARY
POND 2
360
AB-31SI121'111111
PRIMARY
�Ihy7
(.
1 1 1
ICATAWB,
/�
Oil
(LAKE 1
POND
3
IF
11
:TIVE
r BASIN
1 1
114
AB-6A
AB-6R 12
38
CCR-1
CCR-21S NA
NA CCR-20S
NA
AB-5
15 CCR-22S
NA GWA-2S
O 150
CCR-23S yo GWA-1S
NA o 13
DUKE
ENERGY
CAROLINAS
LEGEND
ASSESSMENT MONITORING WELL
BACKGROUND MONITORING WELL
MANGANESE - INFERRED BACKGROUND CONTOUR
ACTIVE ASH BASIN WASTE BOUNDARY
- — - - ASH BASIN COMPLIANCE BOUNDARY
RETIRED ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
DORS FILLS BOUNDARIES
— - - DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (10' INTERVAL)
STREAM (AMEC NRTR 2015)
WETLAND (AMEC NRTR 2015)
APPROXIMATE HYDROLOGIC DIVIDE
►GROUNDWATER FLOW DIRECTION
SURFACE WATER FLOW 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 DATASETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L FOR MANGANESE IS 50 pg/L.
3. THE BACKGROUND VALUE FOR MANGANESE IS 608 pg/L (AS SUBMITTED JUNE 2019).
4. NA - NOT AVAILABLE.
5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018) AND UPDATED
GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (MURDOCH AND OTHERS,
2019).
6. 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 & INFRASTRUCTURE, INC.
NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED
MAY 29, 2015.
7. THE TOPOGRAPHY IS SHOWN FOR REFERENCE PURPOSES ONLYAND 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 https://sdd.nc.gov/sdd/DataDownload.aspx.
8. ALL BOUNDARIES ARE APPROXIMATE.
9. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
10. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11,
2017. AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
11. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 6-25a
GRAPHIC SCALE IN FEET
ISOCONCENTRATION MAP
MANGANESE IN SHALLOW FLOW ZONE
DRAWN BY: C. DAVIS DATE: 06/12/2019
REVISED BY: DATE: 12/17/2019
CORRECTIVE ACTION PLAN UPDATE
APPROVEDED BY:: L.L. DRAGO DATE: 12/17/2019
CHECKED BY: L. DRAGO DATE: 12/17/2019
ALLEN STEAM STATION
PROGRAM MANAGER: C. SLITTELL
BELMONT, NORTH CAROLINA
www.svnterracorp.com

61 I
t ` I
t /
0
0
_ 640
i - �1=
v ca r
ALLEN
STEAM STATION WATER
STATION INTAKE STRUCTURE
i �
I,' , +►�y♦ ♦♦ i COAL
•, •, '� �' ,� ���` oil L �'
ASH ��� ILE /HOLDING
- STORAGE , , BASIN ■
J
U �
J
r -ASH � J RETIRR ED ASH BASIN
STORAGE ,- j I ASH LANDFILL
RETIRED �
ASH BASIN _ y
PRIMARY
POND 2
PRIMARY
POND 1 -
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/201;
DATE: 12/17/2019
APPROVED BY: L. DRAGO
DATE: 12/17/2019
DATE: 12/17/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SLITTELL
www.s nterracor .COM
LEGEND
NOTES:
FIGURE 6-25b
ISOCONCENTRATION MAP
MANGANESE IN DEEP FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

■ B(
N,
BG-2BRA2 '
♦�
-38BR
74
1
�e
\ AB-35BR
AB-14BR 9
<5 w • ��
w ' i
+If,ter.
GWA-21BR
149
AB-24BR
( 1 - 85
\i S AB-4BR
213
I
S'90
� a
if r
BR
r
u
v
ALLEN
STEAM STATION WATER
STATION INTAKE STRUCTURE
I► OF- -r-
C y
GWA-28BR
89 �• '
GWA-6BRA �♦
220 � _ •
•' GWA-6BRL
67 •
1
♦ CP-6BR
00 14 GWA-5D
Q n ; 147
GWA-SBRA
■
GWA-5BR4
���
��w
��■ J38 �
AB-27BR o
192
GWA-3BRA
AB-25BR
NA
<5
GWA-3BRL
5
CCR-16BR
:640
♦ CCR-16D
AB-22BRL
9
AB-22BR
99
OF
�� GWA-16R O ♦♦ �
*4
DUKE
425 0
425 850
ENERGY
GRAPHIC SCALE
IN FEET
CAROLINAS
DRAWN BY: C. DAVIS
REVISED BY: J. KIRTZ
DATE: 06/12/2019
DATE: 12/17/2019
DATE: 12/17/2019
APPROVED BY: L. DRAGO
DATE: 12/17/2019
CHECKED BY: L. DRAGO
synTerra
PROGRAM MANAGER: C. SLITTELL
www.synterracorp.com
LEGEND
ASSESSMENT MONITORING WELL
BACKGROUND MONITORING WELL
ISOLATED EXCEEDANCE OF BACKGROUND
-- MANGANESE - INFERRED BACKGROUND CONTOUR
ACTIVE ASH BASIN WASTE BOUNDARY
- - - - ASH BASIN COMPLIANCE BOUNDARY
- - - - - RETIRED ASH BASIN WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL COMPLIANCE
BOUNDARY
- - - - DORS FILLS BOUNDARIES
DUKE ENERGY CAROLINAS PROPERTY LINE
TOPOGRAPHIC CONTOUR (10- INTERVAL)
STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
APPROXIMATE HYDROLOGIC DIVIDE
GROUNDWATER FLOW DIRECTION
—SURFACE WATER FLOW 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 DATASETS CONTAINING FEWER THAN
FOUR VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA WAS USED.
2. THE 02L FOR MANGANESE IS 50 pg/L.
3. THE BACKGROUND VALUE FOR MANGANESE IS 360.3 pg/L (AS SUBMITTTED JUNE
2019).
4. NA- NOTAVAILABLE.
5. HYDROLOGIC DIVIDE IDENTIFIED IN CSA UPDATE (SYNTERRA, 2018) AND UPDATED
GROUNDWATER FLOW AND TRANSPORT MODELING REPORT (MURDOCH AND OTHERS,
2019).
6. 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 & INFRASTRUCTURE, INC.
NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ALLEN STEAM STATION DATED
MAY 29, 2015.
7. 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 https://sdd.nc.gov/sdd/DataDownload.aspx.
8. ALL BOUNDARIESARE APPROXIMATE.
9. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
10. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11,
2017. AERIAL WAS COLLECTED ON OCTOBER 8, 2016.
11. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83).
FIGURE 6-25c
ISOCONCENTRATION MAP
MANGANESE IN BEDROCK FLOW ZONE
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

Notes:
Source Water
1.
See Figure
1-2 for all seep and
Legend
surface water sampling locations
2.
* indicates a sampling event prior
to
■ Active Ponded 1*
Seep Legend
1/1/2018 was used
• SW-01
A, SW-02
■ S-01* ♦ S-05*
Affected
■
R
V SW-03
• S-02 Z S-07*
_
� �
♦ SW-04
Seep & 5-03 * S-08
x
Op ♦
Affected
S-04 ❑ S-086*
°
9�
■ R Q S-09*
Generally
Unaffected
�
rye°
ci goo
f oo° \ S-10
1
Potential
�op�
♦ ■ SW-S-02
Mixing
00 'A
N�
F,
Generally
V
0
Unaffected
80%�
2
00
80%R
60%
Z
60%
�O
ry
40%
40% 80%
2
00 80%
A♦
14
410
CR
A
20% �oi 60% ■
a `
SO 60% U'O
/40
oo° 4
So Surface
o 0
/° ■ z
0 0
<o
°
* 4M 40 /°
0 0
s— Ca
6 o
— Water
N o< ■ V
— Cl � 20% AL ~ ♦
O\
pO
20%
Surface Water
VA
■
Legend
■
SW-05*
* SW-AB-07
SW-D1
0 0
0 0
o
•
SW-06
■ SW-BG-01
SW-DG-02
s— Ca
—
— Cl —10
L
SW-07
• SW-BG-02
SW-IAB-01
DU
DRAWN BY: R. Badum
DATE: 10/3/2019
■
SW_gg_01
A SW-BG-03
SW-IAB-02
N E
REVISED BY: R.Badum
DATE:12/3/2019
FIGURE 6-26
•
SW_AB_02
■ SW-CP-01
SW-IAB-03
CHECKED BY: L. Drago
APPROVED BY: L. Drago
SEEP AND SURFACE WATER
PIPER DIAGRAMS
A
SW-AB-03
• SW-CP-02
SW-IAB-04
t'
PROJECT MANAGER: C. Suttell
CORRECTIVE ACTION PLAN UPDATE
V
SW-AB-04
A SW-CP-03
SW-IAB-05
ALLEN STEAM STATION
♦
SW-AB-05
SW-U1
synTerra
www.synterracorp.com
BELMONT, NORTH CAROLINA

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 6-27
Pourbaix Diagram for Iron -Water System
Included in Section 6 text

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 6-28a
Remedial Alternative 3 - Well System
Layout - Groundwater Remediation by
Extraction Combined with Clean Water
Infiltration and Treatment (Vertical)
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station SynTerra
Figure 6-28b
Remedial Alternative 3 - Well System
Layout - Groundwater Remediation by
Extraction Combined with Clean Water
Infiltration and Treatment (Horizontal)
Provided in separate electronic figure file as a
large sheet size

BASED ON INFORMATION FROM DUKE ENERGY CAROLINAS VAULT LID WITH
VEHICLES USING THE PLANT ROADS WHERE EXTRACTION AND CHANNEL FRAME
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. FLOW SHUTOFF
PRESSURE CONTROL VALVE SOLENOID
FINISHED GRADE MAGNETIC FLOW METER VALVE
\ (NORMALLY
PRESSURE GAUGES CLOSED)
AIR VENT BALL VALVE'
♦FLOWCONCRETE ULT
�TER LEVEL SENSOR SEAL I —SS FLANGE
/ D
DRAIN'
CAP
P/X�C/A/I/NG
CK BEDDING w/COMPRESSIONS C E N/ ALIZERWELL HEAD PESSURE
MONITORING TRANSDUCER
d�F GROUNDWATER
d
WELL PIPE GUIDES
I °
LEVEL
a
a
CONTROL SENSOR CABLE
/ ® CEMENT WITH 5 % BENTON
1Z" tSVKtKVLt
F11;
///////
6" WELL SCREEN
THREADED JOINT
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/
DUKE
4*5
NOT TO SCALE
FIGURE 6-2NREMEDIAL ALTERNATIVE 3
ENERGY
CONCEPTUAL VERTICAL CLEAN WATER
DRAWN BY: J. CHASTAIN DATE:12/12/2019
CAROLINAS
INFILTRATION WELL SCHEMATIC
REVISED BY: DATE:-
CHECKED BY: J. CLEMMER DATE: 12/12/2019
APPROVED BY: J.CLEMMER DATE:12/12/2019
REMEDIATION BY EXTRACTION COMBINED WITH
CLEAN WATER INFILTRATION AND TREATMENT
4'
PROJECT MANAGER: C. SUTTELL
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
synTerra
www.synterracorp.com
BELMONT, NORTH CAROLINA

GROUND SURFACE
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 LEIS 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:12/26/2019
REVISED BY: DATE: -
CHECKED BY: J. CLEMMER DATE: 12/26/2019
APPROVED BY: J. CLEMMER DATE: 12/26/2019
��
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 6-28d
REMEDIAL ALTERNATIVE 3
CONCEPTUAL HORIZONTAL WELL
REMEDIATION BY EXTRACTION COMBINED WITH
CLEAN WATER INFILTRATION AND TREATMENT
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

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: 12/12/2019
REVISED BY: DATE: -
CHECKED BY: J. CLEMMER DATE: 12/12/2019
APPROVED BY: J. CLEMMER DATE: 12/12/2019
161P
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 6-28e
REMEDIAL ALTERNATIVE 3
CONCEPTUAL HORIZONTAL WELL
REMEDIATION BY EXTRACTION COMBINED WITH
CLEAN WATER INFILTRATION AND TREATMENT
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

BASED ON INFORMATION FROM DUKE ENERGY CAROLINAS VAULT LID WITH
VEHICLES USING THE PLANT ROADS WHERE EXTRACTION AND
INFILTRATION WELLS WILL BE LOCATED ARE LIMITED TO LESS CHANNEL FRAME
THAN 6,000 LBS AND SPEEDS LESS THAN 25 MPH. WELL
VAULTS IN THE ROAD MUST BE RATED AS H2O ENCLOSURES.
MAGNETIC FLOW METER
FINISHED GRADE\ PRESSURE GAUGE\ MANUAL FLOW
SAMPLE VALVE,, CONTROL VALVE
I SUBMERSIBLE PUMP V V FLOW
MAGNETIC FLOW METER y
WELL CAP \� --- ---- — d
CONCRETE VAULT D --=---- ----- —
SS FLANGE
LT WATER LEVELS NSOR P
CASING CENTRAL
(IMATE LEVEL CONTROL SENSOF
TABLE��HIGH LEVEL CONTROL
/ THREADED JOINT
VEX
OW -LOW SHUT-OFF SENSOR
ELL PIPE GUIDES
BOREHOLE
C SI
L CASNG
lFfl I(]INTS
IATER LEVEL PRESSURE TRANSDUCER
ELL PUMP POWER CABLE
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' HOPE
,HEADER PIPE
I=
NOT FOR CONSTRUCTION
4*5
DUKE NOT TO SCALE FIGURE ERNREMEDIAL ALTERNATIVE 3
ENERGY CONCEPTUAL VERTICAL EXTRACTION WELL
CAROLINAS DRAWN BY: J.CHASTAIN DATE:12/12/2019 SCHEMATIC
REVISED BY: DATE:- REMEDIATION BY EXTRACTION COMBINED WITH
CHECKED BY: J. CLEMMER DATE: 12/12/2019
APPROVED BY: I. CLEMMER DATE:12/12/2019 CLEAN WATER INFILTRATION AND TREATMENT
' PROJECT MANAGER: C. SUTTELL CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
synTerra www.synterracorp.com BELMONT, 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 0
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:12/20/2019
REVISED BY: DATE: -
CHECKED BY: J. CLEMMER DATE: 12/20/2019
APPROVED BY: J. CLEMMER DATE: 12/20/2019
l0p
PROJECT MANAGER: C. SUTTELL
synTero
www.synterracorp.com
NOT FOR CONSTRUCTION
FIGURE 6-28g
REMEDIAL ALTERNATIVE 3
CONCEPTUAL TRENCH DETAIL
REMEDIATION BY EXTRACTION COMBINED WITH
CLEAN WATER INFILTRATION AND TREATMENT
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

MODEL TIMEFRAME: �•
SYSTEM STARTUP AND OPERATION
MODEL TIMEFRAME: ••
APPROXIMATELY 4 YEARS AFTER
``
SYSTEM STARTUP AND OPERATION00,
C•
•
._•_�
PLAN: -LLEN RD
;
•_-
r PLANTALLEN Rp
_
`�
a
1
'
1 �
1
j
�
I
r
�.
r
-
MODEL TIMEFRAME: •'
APPROXIMATELY 7 YEARS AFTER
SYSTEM STARTUP AND OPERATION "
MODEL TIMEFRAME:
APPROXIMATELY 10 YEARS AFTER
SYSTEM STARTUP AND OPERATION
+
— -
1 .r-
• /7 PLANTALLEN
'
PLANTA-LEN RD•
•
+
RD
�'
4#77
I
♦
,
�
. , ?r
M � � , a
—
r .♦ '.
,.
it
Qll
Ql
a.
r
O
N 1
C
p
1
o
N
�
p
V
O
1
p
O
Q9
fi
r
LEGEND I
''
�---Z
�'
�.-. .-'
�•'��
BORON CONCENTRATION RANGE (700- RETIRED ASH BASIN ASH LANDILL WASTE
4000Ng/L) BOUNDARY
PROPOSED EXTRACTION WELL ASH BASIN ASH LANDFILL
NOTES:
THE US DELINEATION HAS NOT BEEN APPROVED BATHE DETERMINATION ARMY CORPS OF ENGINEERS AT AN TIME OF
1. THE WATERS CREATION.
THE MAP BOUN ARIESWEREISNOTTOBE FROMS RFOR EAMANDWETIONALEATIONCOND COSES.THEWETLANDSAND
STREAMS BOUNDARIESWL&INFRAINED LINEATI TEN FOSTER
(> DUKE
GRAPHIC SCALE
800 0 800 1,600
FIGURE 6-28h
REMEDIAL ALTERNATIVE 3 VERTICAL WELLS ONLY
( )
�-_RETIRED
PROPOSED CLEAN WATER INFILTRATION COMPLIANCE BOUNDARY
TR)FORYAMEC
SOURCAND
WHEELER ENVIRONMENTAL 8INFRASTRUCTURE,INC. NATURAL RESOURCE TECHNICAL REPORT(NRTR)FORALLEN
STRUCTUR INFRASTRUCTURE, INC. NATURAL CAL REPO
STATION DATED MAY29,2015.
2.ALLBOUNDARUNDARIES ARE APROVIDEATE.
STEAM
ENERGY®
CAROLINAS
(IN FEET)
GROUNDWATER REMEDIATION BY EXTRACTION
COMBINED WITH CLEAN WATER
DRAWN BY:C. WYATT
REVISED BY: J. KIRTZ
CHECKED BY: L. DRAGO
DATE:12/09/2019
DATE: 12/23/2019
DATE: 12/23/2019
WELL _ - - DORS FILLS BOUNDARIES
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
ACTIVE ASH BASIN WASTE BOUNDARY SITE FEATURE
2078ERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 5, 2018. AERIAL WAS COLLECTED ON JULY 8,
INFILTRATION AND TREATMENT
SIMULATED BORON CONCENTRATIONS IN ALL FLOW ZONES
_ - - RETIRED ASH BASIN WASTE BOUNDARY - DUKE ENERGY CAROLINAS PROPERTY LINE
_ - - ACTIVE ASH BASIN COMPLIANCE BOUNDARY } STREAM (AMEC NRTR 2015)
® WETLAND (AMEC NRTR 2015)
5. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM RIPS
(NAD83/2011).
3200
Terra
APPROVED BY: L. DRAGO DATE: 12/23/2019
PROGRAM MANAGER: C.SUTTELL
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
www.s nterracor
.com
BELMONT, NORTH CAROLINA

MODEL TIMEFRAME:
'�
MODEL TIMEFRAME:
SYSTEM STARTUP AND OPERATION
APPROXIMATELY 4 YEARS AFTER
SYSTEM STARTUP AND OPERATION
e`..
---- - - - - --
Qb 'a
aw
ANTALLEN.', ��
__
_ 'a 'a�
��
CANT qLLEN RD
jib
�� ��
" A a 'a
'
,
♦
,
♦
'
a.,m
1
-'k
1
I
�
U'
0! 'I I A A
rlt
0
'al
. .
�I
MODEL TIMEFRAME:
''
MODEL TIMEFRAME:
APPROXIMATELY 7 YEARS AFTER
APPROXIMATELY 10 YEARS AFTER
SYSTEM STARTUP AND OPERATION
SYSTEM STARTUP AND OPERATION
��
a aaa e
'a'a 'a 'a � � `
a a a ee e e+\
e
`,
�
i
ANT ALIEN RD
�r 'a e e
e�
CANT •
ALIEN RD
e, e'a e e
" . 'a� 4 e a e�'a
J
��.
. , 'a ,
"�,
e
/
A
'alp
1
ell
III
opei
�
1
I
ell
A
e�
el
LEGEND
006 SULFATE CONCENTRATION RANGE >1000m /L _ RETIRED ASH BASIN ASH LANDILL WASTE NOTES:
( g' 1. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME OF
GRAPHIC SCALE
FIGURE 6-28i
SULFATE CONCENTRATION RANGE (250-
�1000mg/L)
BOUNDARY THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND
FROM STREAMELINEA DELINEATIONTEN BYAMER FOSTER
STREAMS BOUNDARIES WL&INFRASTRUCTUR
/►DUKE
�
410 0 410 820
REMEDIAL ALTERNATIVE 3 VERTICAL WELLS ONLY
( )
LRESOURAND
TR)FORFOSTER
-- RETIREDASH BASINASH LANDFILL WHEELER ENVIRONMENTALEOBTAINED
,INC.N TURALR SOURCLINEATI CAL REPO
COMPLIANCE BOUNDARY STATION DATED MAY 29,2015.
ENERGY®
(IN FEET)
GROUNDWATER
REMEDIATION BY EXTRACTION
PROPOSED EXTRACTION WELL
CAROLINAS
COMBINED WITH CLEAN WATER
DRAWN BY: C. WYATT DATE: 12/09/2019
- DORS FILLS BOUNDARIES 2.ALL BOUNDARIES ARE APPROXIMATE.
PROPOSED CLEAN WATER INFILTRATION WELL PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY
INFILTRATION AND TREATMENT
3. CAROLINAS.
SITE FEATURE
ACTIVE ASH BASIN WASTE BOUNDARY 4. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 5, 2018. AERIAL WAS COLLECTED ON JULY 8,
REVISED BY: J. KIRTZ DATE: 12/23/2019
CHECKED BY: L. DRAGO DATE: 12/23/2019
SIMULATED SULFATE CONCENTRATIONS IN ALL FLOW ZONES
- - • RETIRED ASH BASIN WASTE BOUNDARY
- ASH BASIN COMPLIANCE BOUNDARY
- DUKE ENERGY CAROLINAS PROPERTY LINE 2018.
STREAM (AMEC NRTR 2015) 5. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM RIPS
3200
APPROVED BY: L. DRAGO DATE: 12/23/2019
PROGRAM MANAGER: C. SUTTELL
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
- -ACTIVE (NAD8312011).
® WETLAND (AMEC NRTR 2015)
Terra
www.synterracorp.com
BELMONT, NORTH CAROLINA

MODEL TIMEFRAME:
SYSTEM STARTUP AND OPERATION
!•
`
MODEL TIMEFRAME: ♦•
APPROXIMATELY 4 YEARS AFTER
SYSTEM STARTUP AND OPERATION
�•
-
•
• is
00, •_._� '.�
7 .� ��'iD
PLANTALLEN RD Q
�
0
- • ��
r • � PLANTALLEN RD
WL
W
loom
1
'
pR
'1
j
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I
FT I
r
�. 1
r
�.
T
-
MODEL TIMEFRAME:
APPROXIMATELY 7 YEARS AFTER
SYSTEM STARTUP AND OPERATION "
MODEL TIMEFRAME:
APPROXIMATELY 10 YEARS AFTER
SYSTEM STARTUP AND OPERATION
• .♦ ------ IS
•
PLAN
/ ._.+• _a
f
PLANTA-LEN RD•+
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p
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LEGEND I
''
�---Z 4'
�.-. .-'
�•
NOTES:
BORON CONCENTRATION RANGE (700- RETIRED ASH BASIN ASH LANDILL WASTE
THE US DELINEATION HAS NOT BEEN APPROVED BATHE DETERMINATION ARMY CORPS OF ENGINEERS ATTHE TIME OF
T THE WATERS CREATION.
4000Ng/L) BOUNDARY THE MAP BOUN ARIESWEREISNOTTOBE FROMS RFOR EAMANDWETIONALEATIONCOND COSES.THEWETLANDSAND
STREAMS BOUNDARIESWL&INFRAINED LINEATI TEN FOSTER
PROPOSED EXTRACTION WELL ASH BASIN ASH LANDFILL
(> DUKE
GRAPHIC SCALE
800 0 800 1,600
FIGURE 6-28'
( 1 )
REMEDIAL ALTERNATIVE 3 HORIZONTAL AND VERTICAL WELLS
�-_RETIRED
PROPOSED CLEAN WATER INFILTRATION COMPLIANCE BOUNDARY
TR)FORYAMEC
SOURCAND
WHEELER ENVIRONMENTAL 8INFRASTRUCTURE,INC. NATURAL RESOURCE TECHNICAL REPORT(NRTR)FORALLEN
STRUCTUR INFRASTRUCTURE, INC. NATURAL CAL REPO
STATION DATED MAY29,2015.
2.ALLBOUNDARUNDARIES ARE APROVIDEATE.
STEAM
ENERGY®
CAROLINAS
(IN FEET)
GROUNDWATER REMEDIATION BY EXTRACTION
COMBINED WITH CLEAN WATER
DRAWN BY:C. WYATT DATE:12/09/2019
REVISED BY: J. KIRTZ DATE: 12/23/2019
L.
CHECKED BY: LDRAGO DATE: 12/23/2019
WELL - - - DORS FILLS BOUNDARIES
3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
PROPOSED INFILTRATION HORIZONTAL WELL SITE FEATURE
AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 5, 2018. AERIAL WAS COLLECTED ON JULY B,
2078
INFILTRATION AND TREATMENT
SIMULATED BORON CONCENTRATIONS IN ALL FLOW ZONES
ACTIVE ASH BASIN WASTE BOUNDARY � - DUKE ENERGY CAROLINAS PROPERTY
_ • RETIRED ASH BASIN WASTE BOUNDARY —)I—STREAM (AMEC NRTR 2015)
LINE
5. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM RIPS
(NAD83/2011).
3200
APPROVED BY: L. DRAGO DATE: 12/23/2019
PROGRAM MANAGER: C.SUTTELL
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
- - ACTIVE ASH BASIN COMPLIANCE BOUNDARY ® WETLAND (AMEC NRTR 2015)
Terra
BELMONT, NORTH CAROLINA
WWW.S nterracor .com

MODEL TIMEFRAME:
'�
MODEL TIMEFRAME:
SYSTEM STARTUP AND OPERATION
APPROXIMATELY 4 YEARS AFTER
SYSTEM STARTUP AND OPERATION
eQ5
ANTALLEN RD _ _ � ♦
�♦
•
' . �
Q5 l
`ANT A"EN RD
�
,
_
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Q5 Q5
,
Q5
1
,�
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v,
I A ' A
A A
FIN
.
0
�1
_
. .
•I
MODEL TIMEFRAME:
''
MODEL TIMEFRAME:
APPROXIMATELY 7 YEARS AFTER
APPROXIMATELY 10 YEARS AFTER
SYSTEM STARTUP AND OPERATION
SYSTEM STARTUP AND OPERATION
ANTALLEN R°♦
LAN 'ALLEN Rp
- . Nb
,
♦
• •
♦
��
Q5 I
A
A
„
III
,
1
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IQ5':
LEGEND �'
♦
`�
NOTES
SULFATE CONCENTRATION RANGE 1000m /L RETIRED ASH BASIN ASH LANDILL WASTE � ( 9 ) � 7. THE WATERS THE US DELINEATION HAS NOT BEEN APPROVED BY ARMY CORPS OF ENGINEERS AT TIME OF
GRAPHIC SCALE
FIGURE 6-28k
1111111— SULFATE CONCENTRATION RANGE (ZSO-
1000m /L )
BOUNDARY IO AN
THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR JURISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND
E
RETIRED ASH BASIN ASH LANDFILL STREAMS BOUNDARIES WERE AND LINEATI
)FORALMEC STER
/►� DUKE
410 o 410 szo
REMEDIAL ALTERNATIVE 3 (HORIZONTAL AND VERTICAL WELLS)
J
• PROPOSED EXTRACTION WELL
NATURAL SOURCAND
L&INFROBTAINED STRUCTFROM INFRASTREAMTRUCTURE, INC. CAL REPORT
� � WHEELER ENVIRONMENTAL 8INFRASTRUCTURE,INC. NATURAL RESOURCE TECHNICAL REPORT NRTR FORALLEN
COMPLIANCE BOUNDARY STATION DATED MAY 29, 2015.
STEAM
ENERGY®
(IN FEET)
(IN
GROUNDWATER
REMEDIATION BY EXTRACTION
••
PROPOSED CLEAN WATER INFILTRATION
DORS FILLS BOUNDARIES 2.ALL BOUNDARIES ARE APPROXIMATE.
WELL �
CAROLINAS
WITH CLEAN WATER
INFILTRATION AND TREATMENT
DRAWN BY: C. WYATT DATE: 12/09/2019
J�jpREVISED
SITE FEATURE 3. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
PROPOSED INFILTRATION HORIZONTAL WELL
4.AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 5, 2078. AERIAL WAS COLLECTED ON JULY 8,
DUKE ENERGY CAROLINAS PROPERTY LINE 2018.
BY: J. KIRTZ DATE: 12 23 2019
/ /
CHECKED BY: L. DRAGO DATE: 12 23 2019
/ /
SIMULATED
SULFATE CONCENTRATIONS IN ALL FLOW ZONES
ACTIVE ASH BASIN WASTE BOUNDARY
• • RETIRED ASH BASIN WASTE BOUNDARY
-)I-STREAM (AMEC NRTR 2015) 5. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM RIPS
(NAD83/2011).
3200
APPROVED BY: L. DRAGO DATE: 12/23/2019
PROGRAM MANAGER: C.SU17ELL
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
• ACTIVE ASH BASIN COMPLIANCE BOUNDARY
® WETLAND (AMEC NRTR 2015)
Terra
BELMONT, NORTH CAROLINA
www.s nterracor .com

EXISTING FIRE
SUPPRESION
SYSTEM
Not to Scale
LEGEND
HH - High high 0:D
H - High low
L — Low `y'
TYP - Typical SP
SODIUM
HYPOCHLORITE
FEED
POLYMER FEED
I
I
I
I
I
1
i
RAPID
SEDIMENTATION FILTRATION
MIX
BASIN
RAPID
SEDIMENTATION FILTRATION
MIX
BASIN
POLYMER
FEED
SODIUM
HYPOCHLORITE
FEED
Flow totalizer 14 Check valve
Pressure gauge >< Three-way valve
Sampling port /N Ball valve, normally
closed
I
i I
I
I
I
DRAIN AND
SOLIDS
REMOVAL
Doa L� 4
O
O Do�il�
I
I
---------------
® Rotameter
D01 Ball valve, normally open
CD
Diaphragm valve, normally open
I
Diaphragm valve, normally closed
RECHARGE SUPPLY
TANK
PRESSURE GAUGE AND SHUTOFF VALVE AT EACH WELL HEAD
ENKE
BGY
CAROLINA$
16'
symTerra
CLEAN WATER
INFILTRATION WELLS
DRAWN BY: T. COLTON
REVISED BY: B. GREEN
CHECKED BY: T. COLTON
APPROVED BY: L. DRAGO
PROJECT MANAGER: C. SUTTELL
SIP
I DECHLORINATION _1
I
I
I
I
GRAVITY
FEED
NOTE: PUMP AS NEEDED
DATE:11/17/2019 FIGURE 6-29
CONCEPTUAL PROCESS FLOW DIAGRAM
CLEAN WATER INFILTRATION SYSTEM
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA
www.synterracorp.com

EXTRACTION
WELLS
DISCHARGE TO NPDES
OUTFALL OR
BENEFICIAL REUSE
Not to Scale
LEGEND
®
Rotameter
�� DUKE
DRAWN BY: B. GREEN DATE: 12/9/2019
REVISED BY: B. GREEN
FIGURE 6-30
CONCEPTUAL PROCESS FLOW DIAGRAM
HH - High high
E01 Flow totalizer
Check valve
CCQ
Ball valve, normal) o
y pen
ENERGY
CAROLINAS
CHECKED BY: T. COLTON
GROUNDWATER EXTRACTON SYSTEM
H - High low
L — Low
Q Pressure gauge
Three-way valve
Diaphragm valve, normally open
APPROVED BY: L. DRAGO
PROJECT MANAGER: C. SUTTELL
CORRECTIVE ACTION PLAN UPDATE
�'
TYP -Typical
SIP Sampling port
Ball valve, normally
H
Diaphragm valve, normally closed
SymTerra
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA
r www.synterracorp.com
closed
I

DISCHARGE TO
FILTRATION NPDES
OUTFALL 002
pH
I ADJUSTMENT
I
I
I
I
I
I
I �
I
I f ?
I
o 0
DRAIN TO
PROPOSED PUMP SECONDARY WIN
STATION IN CONTAINMENT CAUSTIC ACID
TANK TANK DRAIN TO
GROUNDWATER T SECONDARY
COLLECTION I CONTAINMENT
SYSTEM I
Q
ILci
I
I o 0
EXTRACTED fZ fZ
GROUNDWATER $ o-
I
FROM WELLS
FILTRATION
pH
0 o ADJUSTMENT
m DISCHARGE TO
�� pQ NPDES
OUTFALL 002
NOTE: PUMP AS NEEDED
Not to Scale
LEGEND ® Rotameter CNEkGY
UKE DRAWN BY: B. GREEN DATE: 12/9/2019 FIGURE 6-31
REVISED BY: B. GREEN CONCEPTUAL PROCESS FLOW DIAGRAM
HH - High high E01 Flow totalizer Check valve COQ Ball valve, normally open CAROLINA$ CHECKED BY: T. COLTON
H - High low (� CD APPROVED BY: L. DRAGO GROUNDWATER TREATMENT SYSTEM
L — Low 7 Pressure gauge >7< Three-way valve Diaphragm valve, normally open PROJECT MANAGER: C. SUTTELL CORRECTIVE ACTION PLAN UPDATE
16-7 ALLEN STEAM STATION
TYP -Typical SIP Sampling port ON Ball valve, normally H Diaphragm valve, normally closed WnTerra BELMONT, NORTH CAROLINA
closed www.synterracorp.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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DUKE
4N DUKE
BY: R. ISHAM DATE: 12/5/2019
REVISED BY:
r ENERGY
CHECKED BY: S. WOOD
CAROLINAS
APPROVED BY: L. DRAGO
PROJECT MANAGER:C.SUTTELL
10
www.synterracorp.com
synTerra
FIGURE 6-32
CAP IMPLEMENTATION GANTT CHART
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

LEGEND
PROPOSED PERFORMANCE MONITORING WELL
PROPOSED PERFORMANCE MONITORING WELL (NEW)
■ ■ EFFECTIVENESS MONITORING FLOW PATH
ACTIVE ASH BASIN WASTE BOUNDARY
— - - RETIRED ASH BASIN WASTE BOUNDARY
— - - ASH BASIN COMPLIANCE BOUNDARY
RETIRED ASH BASIN ASH LANDFILL WASTE BOUNDARY
— - - RETIRED ASH BASIN ASH LANDFILL COMPLIANCE BOUP
- - DORS FILLS BOUNDARIES
SITE FEATURE
- DUKE ENERGY CAROLINAS PROPERTY LINE
STREAM (AMEC NRTR 2015)
E WETLAND (AMEC NRTR 2015)
SELECT GROUNDWATER WELLS WOULD HAVE GEOCHEMICAL
INDES INSTALLED FOR TELEMETRY MONITORING OF THE SIX
ZOUNDWATER FIELD PARAMETERS. SEE TABLE 6.17 FOR
ZOUNDWATER FELD PARAMETERS AND WELLS TO HAVE
:OCHEMICAL SONDES.
BG-1S/DA/BR, CCR-BG-1 S/DA, AND GWA-21 S/DA/B R ARE
'PROVED BACKGROUND GROUNDWATER MONITORING
THE WATERS OF THE US DELINEATION HAS NOT BEEN
'PROVED BY THE US ARMY CORPS OF ENGINEERS AT THE TIME
THE MAP CREATION. THIS MAP IS NOT TO BE USED FOR
RISDICTIONAL DETERMINATION PURPOSES. THE WETLANDS AND
'REAMS BOUNDARIES WERE OBTAINED FROM STREAM AND
=TLAND DELINEATION CONDUCTED BY AMEC FOSTER WHEELER
MAY 29, 2015.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY
6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO
ON DECEMBER 13, 2018. AERIAL WAS COLLECTED ON MARCH 30,
2018.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH
CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200
(NAD83/2011).
r --.
STORAGE
CCR-BG-1 S/DA
Ile-
.Y
ASH
STORAGE
CCR-25S/D/BR C�
GWA-28S/D/BR
GWA-7S/D P P��EN µo �♦
♦ pl NS � CP-2S/D
GWA-27S/D C
CP-1 S/D P-4S/D
CCR-3S/DA � ♦ -
I- COAL
i
♦ ♦ '+
GWA-6S/DA/BRA/BRL GWA-30S/D • '
ACTIVE
ASH BASIN
GRAPHIC SCALE
(' DUKE 375 0 375 750
ENERGY (IN FEET)
CAROLINAS
DRAWN BY: K. KING DATE: 06/19/2019
14 REVISED BY: J. KIRTZ DATE: 12/20/2019
APPROVED BY: L. DRAGO DATE: 12/20/2019
CHECKED BY: L. DRAGO DATE: 12/20/2019
T PROGRAM MANAGER: C. SUTTELL
CCR-21 S/D
- , CCR-20S/D
AB-9S/D
GWA-3S/D/BRA/BRL
jllL CCR-15S/D/BR
i
AB-10S/D/BR/BRL
i
CCR-18S/D
i
FIGURE 6-33
EFFECTIVENESS MONITORING WELL
NETWORK AND FLOW PATHS
CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
BELMONT, NORTH CAROLINA

Interim
Monitoring Plan Corrective Action
(IMP) sampling )-->Plan Approval
10R
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?
No
Adjust remedial system
components; continue with EMP
or
Implement contingency plan in
accordance with CAP Update
Section 6.8.8; continue with EMP
Continue EMP sampling and Continue PCMP sampling
Annual Review and and Annual Review and
Reporting I I Reporting
Post -Closure Monitoring Plan (PCMP)
Post -closure monitoring to begin
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.
No
Are the groundwater Based on
monitoring results Yes annual evaluation,
below applicable is the plume stable
standards at the at the compliance 000>
compliance boundary boundary?
for three years?
/ \
Is the ash basin Yes
certified closed?
' DUKE
*'ENERGY
Notes: CAROLINAS
NCAC - North Carolina Administrative Code
02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and ��
Standards
synTem
Yes Request completion of active remediation
or
Request completion of PCMP post -closure monitoring
in accordance with G.S. 130A-309.214(a)(3)b
No
JN BY: T. PLATING DATE: 10/112019 FIGURE 6-34
3ED BY: J. WYLIE & K SHECK DATE: 12/16/2019 WORK FLOW FOR EFFECTIVENESS
KED BY: L. DRAGO DATE: 12/19/2019 MONITORING AND OPTIMIZATION
OVED BY: C. SUTTELL DATE: 12/19/2019
ECT MANAGER: C. SUTTELL CORRECTIVE ACTION PLAN UPDATE
ALLEN STEAM STATION
www.synterracorp.com
BELMONT, 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 plan at
reduction of constituents
Has the site
Termination
location of no less
• Constituents have not and
been identified
authorized
after health
than one year'
will not migrate onto
for resource
and safety
predicted time o
adjacent properties
development?�
analysis
travel upgradient of
• GW discharge to surface
any existing or
water will not violate 02B
foreseeable receptor
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