NC0003425_02_Rox_CAP Update 2019_Figures_20191231

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant
FIGURES
CAP Content Section 10
SynTerra

10
I♦11ItINK-51
(APPROXIMATE
GYPSUM STORAGE AREA
-ING AREA
POWER
PLPLANT.I
r EAB MAIN W
1 / \ I LCID LANDFII
DECOMMISIONED BOUNDAF
SLUICE LINE AREA �l
W, AB MAIN DIM oo ♦
ASH
BASIN
WASTE �
WASTE BOUNDARY00
/ A
v U WEST ASH BASIN
s
W�N DISCHAR E AN
U
N—z " WNJ
WESTERN DISCHARGE CANAL
FILERT
77 57 1
ROXBORO PLANT
PARCEL LINE
1
7 \
EAST ASH BASIN
I♦
I
t �
:/ EASTERN DISCHARGE CANAL \/
�HIUST�OR�ICAL,D/E(P/(O/SITION AREA Q
ASH BASIN
WASTE BOUNDARY-1�
EASTERN DISCHARGE ANAL
i SEPARATOR
�\O F�
q SEPARATOR DIKE
U o
INDUSTRIAL LA FILL
BOUNDARY
SOLID WASTE LANDFILL
sso COMPLIANCE BOUNDARY
550�
CURRENT 50SH BASIN° 0
COMPLIANCE BOUNDARY-
v � v
J
G
NO
1. ALL BOUNDARIES ARE APPROXIMATE. v O L� U v
2. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE
ENERGY'S INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY O
BOUNDARIES AND CURRENT PERSON COUNTY G IS. C'll
`P\
3. 2016 USGS TOPOGRAPHIC MAP, OLIVE HILL QUADRANGLE, OBTAINED
FROM THE USGS STORE AT
https:#stom.usgs.gov/map-locator. 0
DUKE PERSON COUNTY FIGURE ES-1
USGS LOCATION MAP
ENERGY WINSTON-SALEM CORRECTIVE ACTION PLAN UPDATE
PROGRESS �RALEIGH ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
CHARLOTTE
DRAWN BY. J. KI RTZ DATE: 06/11/2019 GRAPHIC SCALE
REVISED BY: C. WYATT DATE: 12/19/2019 0 500 1,000 2,000 3,000
WnTerra CHECKED BY: K. LAWING DATE: 12/19/2019
LAWI
APPROVED BY: K. CAWING DATE: 12/19/2019
www.synterracorp.com PROJECT MANAGER: C. EADY (IN FEET)

I�
LCID LANDFILL
INTAKE
j amL
EASTASH
BASIN
tEDUKE
ERGY
PROGRESS
TRICAL
STATION
4 r
GRAPHIC SCALE
0 150 300 600 900
(IN FEET)
DRAWN BY: J. KIRTZ DATE: 06/05/2019
REVISED BY: C. WYATT/K. KING DATE: 12/18/2019
CHECKED BY: K. LAWING DATE: 12/18/2019
APPROVED BY: K. LAWING DATE: 12/18/2019
PROJECT MANAGER: C. EADY
I
I
I
r�
I
LEGEND
AREAS PROPOSED FOR ACTIVE GROUNDWATER
REMEDIATION
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
> STREAMS (AMEC NRTR)
WETLANDS (AM EC NRTR)
NOTES:
1. THE OUTLINE OF AREA 1 BEYOND THEASH BASIN COMPLIANCE BOUNDARY REPRESENTS
THE MAXIMUM FUTURE EXTENT OF BORON PLUME (MAX-B)ABOVE 02L STANDARD
PREDICTED FOR ALL FLOW LAYERS AND ALL YEARS, BASED ON FLOW AND TRANSPORT
MODELING.
2. ALL BOUNDARIES ARE APPROXIMATE.
3. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S
INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT
PERSON COUNTY GIS.
4. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
OF ENGINEERSAT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
BOUNDARIES WERE OBTAINED FROMAMEC FOSTER WHEELER ENVIRONMENTAL &
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO
STEAM ELECTRIC PLANT DATED JUNE 2015.
5. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
6. DRAWING HAS BEEN SET WITH APROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE ES-2
AREAS PROPOSED FOR CORRECTIVE ACTION
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure ES-3
Proposed Corrective Action Approach
Provided in separate electronic figure file as a
large sheet size

I --
aVtt�
(APPROXIMATE
GYPSUM STORAGE AREA
®'
WPOWER
I (`TAKE
CANAL
■
PLANT
EAB MAIN.
/1 I LCID L
DECOMMISIONED BOUNDARY EAST ASH BASIN
SLUICE LINE AREA �l
I/v_�'I
, MAIN DAM � � � , WAB
AB AC
ASH BASIN
WASTE BOUNDARY A /,
u
�s ■ WEST ASH BASIN
WE TERN DISCHARE CANAL
_ .. ,
C.
■
EASTERN DISCHARGE
,"HIIST�OR'ICAL,D/E(P/(O/SITION AREA/
ASH BASIN
WASTE BOUNDARY
0
��i� o
EASTERN DISCHARGE CANAL
1 SEPARATOR
\\O FEE
SEPARATOR DIKE
INDUSTRIAL LANDFILL
BOUNDARY
nAVV�
SOLID WASTE LANDFILL
COMPLIANCE BOUNDARY
■ � 550�
CURRENT 50SH BASIN' O
COMPLIANCE BOUNDARYCssa
v � v
J
m
-
NOTES
_
3�
-
1. ALL BOUNDARIES ARE APPROXIMATE.
2. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE
ENERGY'S INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY
O
BOUNDARIES AND CURRENT PERSON COUNTY G IS.
Q`
3. 2016 USGS TOPOGRAPHIC MAP, OLIVE HILL QUADRANGLE, OBTAINED
FROM THE USGS STORE AT
O
https:#stom.usgs.gov/map-locator
DUKE
PERSON COUNTY
FIGURE 1-1
ENERGY
USGS LOCATION MAP
CORRECTIVE ACTION PLAN UPDATE
WINSTON-SALEM
PROGRESS
0RALEIGH
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
40
CHARLOTTE
DRAWN BY. J. KI RTZ
DATE: 06/11/2019
GRAPHIC SCALE
REVISED BY: C. WYATT
CHECKED BY: K. LAWING
DATE: 12/19/2019
DATE: 12/19/2019
0 500 1,000 2,000 3,000
synTerra
APPROVED BY: K. LAWING DATE: 12/19/2019
PROJECT MANAGER: C. EADY
www.synterracorp.com
(IN FEET)

Il
,j HYCO
RESERVOIR
•. -�� RSW-5
COAL
PILE IN /"> . EDC-5 (j RSW-7
DFA r
. INTAHANDLING
RSW-3 RSW-4
I AREA DTI'
CAN EDC-4
0 '' 1W GYPSUM X
t3„� vrvn oa.vv�uvv '®�, RSW-1 IRS
TOWER PON
. �IF
�,
POWER � � - � ® �
PLANT
�,.m 5
r. M
UNIT 3
HEATED WATER
EATED WATER �" DISCHARGE POND
CHARGE POND
MW-27BR
MW-22D
FMW-2,?BR/BRL S-21
GCCR-1056R CCR-106BR CW71
lie
lie
� ®MW-1 BR/BRL
GMW-11 CCR-107BR� <�"
- MW ' 5D MW-37D
MW-6BR
CCR-101BR®
ABMW-5
3
[
S-23
MW-11D
ABMW-5D
C
S-19 CW-2-2D
MW-5D
CCR-100D
CCR-100BR
'
CCR-203S CW
MW-5BR ®CW-5
WMW-1BRJS-KgKg20
CCR-203D CCR-200BR t
MW-1�
ABMW6
CCR-203BR
rt
ABMW-6BR
S 2
S-7 S-4 wi
CCR-201 BR
S-8 ❑ S-1
S 6 S 5 S-3 ABMW-3
CCR-202D
a CCR-202BR
MW-2B�
O
INSET SCALE: 1" =
® MW-35BR' MW-37B
ABMW-7
ABMW-7BR/BRL/BRLL
IGMW-71
INDUSTRIAL
LANDFILL
GMW-8~ wMW-21 BRL
MW-13BR ;•'
IWMW-19BRL
MW-10BR `
0
S-10 ` CCR-109BR ED
S-1
D-6-OS4;.:: '.
11B
PRSW-6
MW-14S
MW-14D
MW-14BR
MW-29BR I
LEGEND
WELL IN ASH PORE WATER
`
WELL IN SHALLOW ZONE
I
WELL IN TRANSITION ZONE
CCR-112BR-BG
WELL IN BEDROCK ZONE
WELLABANDONED
PIEZOMETER
- —
MW-23BR/BRR I
MW-20BRL '
I
D
NL-8 SL-8
MW-24BR
MW-17BR
AL -k' •
a.
s•
1�1
a / IN
DUKE
* It' ENERGY
�.�.
PROGRESS
GRAPHIC SCALE
400 0 400 800
(IN FEET)
DRAWN BY: C. DAVIS DATE: 05/03/2019
REVISED BY: C. WYATT/K. KING DATE: 12/20/2019
CHECKED BY: K. LAWING DATE: 12/20/2019
APPROVED BY: K. LAWING DATE: 12/20/2019
PROJECT MANAGER: C. EADY
SOIL SAMPLE LOCATION
CONSTRUCTED SEEP
NON -CONSTRUCTED SEEP
DISPOSITIONED SEEP
SURFACE WATER/SEDIMENTSAMPLE LOCATION
SURFACE WATER/SEDIMENTSAMPLE LOCATION
EFFLUENT WATER SAMPLE LOCATION
EFFLUENT WATER/SEDIMENT SAMPLE LOCATION
SEDIMENT SAMPLE LOCATION
WATER SUPPLY WELL
0 IN -STREAM SURFACE WATER SAMPLE LOCATION PER SOC
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
EFFLUENT DISCHARGE CANAL
SOLID WASTE LANDFILL BOUNDARY
SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS PROPERTY LINE
STREAMS (AMEC NRTR)
WETLANDS (AMEC NRTR)
NOTES:
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND AREA MIX OF SURVEYED AND
APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED APPROXIMATE.
2. SPECIAL ORDER BY CONSENT (SOC) LOCATIONS ARE DESCRIBED IN SOC WQ S18-005.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S INTERPRETATION OF
HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON COUNTY GIS.
5.4.)THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF
ENGINEERSAT THE TIME OF THE MAP CREATION. THIS MAP ISA PRELIMINARY JURISDICTIONAL
DETERMINATION ONLY. THE PRELIMINARY WETLANDSAND STREAMS BOUNDARIES WERE OBTAINED FROM
AMEC FOSTER WHEELER ENVIRONMENTAL&INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL
REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC PLANT DATED JUNE 2015.
6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL WAS
COLLECTED ON JUNE 13, 2016.
7. DRAWING HAS BEEN SET WITH PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM
RIPS 3200(NAD83).
FIGURE 1-2
SITE LAYOUT MAP - EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

CCR-102BR MW-35S MW-37S
MW-6D CCR-101D PZ-14
MW-35D MW-37D MW-108BRL/BRLL
CCR-101BR®
S MW-6BR S 23 ABMW-5 MW-35BR MW-376R ,
*� tye3d. y MW-11 D ' ABMW-5D ABMW-7
*` MW-11BR® ABMW-7BR/BRL/BRLL EDC-00 0
CW-2D MW 5D
MW 23BR/BRR
S-19FCW ®CCR-100BR ABMW-4RR ` _ ?
os
MW-20BRL
CCR-203S MW 5BR ®CW_5 _ PZ-12
WMW-1BR � S 20
T
MW-9BR CCR-203D S-18 ABMW6 a '- — - • ' � CL-4 ��
MW-1 CCR-200BR _• NL-4
CCR-203BR S 2 ABMW-6BR CCR-110BIR NL-8 SL-8
S-7 S-4 CCR-201 BR► I J -2BR GMW-7 +1 CV-1
�' • CCR-2046R g 6 S-5
S-3 ABMW-3 CCR-202D MW-246R
CCR-202 B R
MW-2 ABMW-36R/BRL � "
ROX-1 GMW-ft MW-21BRL �.
ABMW-1 GMW-9
CCR-205BR MW-205BRL/BRLL/BRLLL GMW-8R , MW-216RLR MW-25BR
' ABMW-16R
CCR-206S
����� MW-12BR
' t CCR-206BR LEGEND
CCR-207S •
I WELL IN ASH PORE WATER
CCR-207 B R
WELL IN SHALLOW ZONE
MW-33BR CCR-208S �, • MW-13BR WELL IN TRANSITION ZONE
CCR-208BR AB WELL IN BEDROCK ZONE
' WELLABANDONED
� ABM R MW-16BR Y„
MW-208BRL/BRLL/BRLLL ROX-2 PIEZOMETER
k' MW-19BRL
SOIL SAMPLE LOCATION
z CCR-209S _ +MW-10BR CONSTRUCTED SEEP
MW-7BR CCR-209BR
� NON -CONSTRUCTED SEEP
CCR-210S CCR-212BR DISPOSITIONED SEEP
MW-32BR ' CCR-213BR
CCR-210BR - k, SURFACE WATER/SEDIMENTSAMPLE LOCATION
CCR-211S % SURFACE WATERISEDIMENT SAMPLE LOCATION
CCR-211 BR EFFLUENT WATER SAMPLE LOCATION
CCR-214BR ; EFFLUENT WATER/SEDIMENT SAMPLE LOCATION
� SEDIMENT SAMPLE LOCATION
WATER SUPPLY WELL
CCR-215BR IN -STREAM SURFACE WATER SAMPLE LOCATION PER SOC
�_ / j'n✓+ .' \J`I _�J� CCR-2166R -
/ MW-26BR ASH BASIN WASTE BOUNDARY
ty - ASH BASIN COMPLIANCE BOUNDARY
31�EFFLUENT DISCHARGE CANAL
MW-31 BR CCR-217BR SOLID WASTE LANDFILL BOUNDARY
• Z� BR-1BRL/BRLR .
_ SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
�; ♦ MW-4BR/BRL CCR-218BR DUKE ENERGY PROGRESS PROPERTY LINE
a d � �ij � I ��` � ♦ ♦ BG-1 � STREAMS (AMEC NRTR) WF-1 CF_1 Ia,
WETLANDS (AMEC NRTR
)
�NOTES
CW-4
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES ANDARE A MIX OF SURVEYEDAND
v� ` �` / /%�11 r-I f ♦ ♦ �/ APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED APPROXIMATE.
2. SPECIAL ORDER BY CONSENT (SOC) LOCATIONS ARE DESCRIBED IN SOC WO 518-005.
CF-3
3. ALL BOUNDARIES ARE APPROXIMATE.
MW-15BR a 4. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S INTERPRETATION OF 5 �/� �L / �� ♦ WIF HISTORICAL DOCUMENTED PROPERTY BOUNDARIESAND CURRENT PERSON COUNTY GIs.
�^ ♦ MW-39D
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF ENGINEERS
0.�� \ nj�'(�/ �� �[y�° J • MW-39BR AT E PRELIMINARY
THE MAP LANDSCREATION. NDSTE MAP IS A BOUNDARIES
WERE OBTAINED
DETERMINATION ONLY.
E VIRO MENARYWETLASTR CTURE, STREAMS BOUNDARISOURCE OBTAINED FROM AM E RTR)F FOSTER WHEELER
ENVIRONMENTAL&INFRASTRUCTURE,INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR)FOR
MW_18BR ' ROXBORO STEAM ELECTRIC PLANT DATED JUNE 2015.
'=�1 � I� � � � \ \� -1� � y 6.AERIAL PHOTOGRAPHY OBTAIN ED FROM GOGGLE EARTH PRO ON OCTOBER 11, 2017.AERIAL WAS
/�/J1 r`J l ` CF-rJ COLLECTED ON JUNE 13, 2018.
7. DRAWING HAS BEEN SET WITHA PROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE SYSTEM
,�- i��' ". �11 .� \ ;\ yr++ ♦� MW-38D _ RIPS 3200(NAD83).
GRAPHIC SCALE
DUKE aao O 440 aao FIGURE 1-3
t� ENERGY
� ���,� 1 ��♦�' PROGRESS (IN FEET)
SITE LAYOUT MAP - WEST ASH BASIN
1 \ (/\ ♦ DRAWN BY: C.DAVIS DATE:05//2019 CORRECTIVE ACTION PLAN UPDATE
REVISED BY: C. WYKING DATE: 12/2020/2019
CHECKED BY: K.L4WINGWING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
APPROVED BY: K. LAWING DATE: 12/20/2019
/ _� `' •/ PROJECT MANAGER: C. EADY SEMORA, NORTH CAROLINA
INSET SCALE: 1" = 2500 \ ,ter U� o a� ,�- synTerra
www.synterracorp.com

/ \ 1�FUTUREYCOR��
�--i�pNP� xFUTURE NPD
ROXBORO STEAM F
ELECTRIC PLANT
( ■ram
FUTURE PLANT
INTAKE POND ----
J ( ! r—-UNNAMED CREEK
�i f —_--�
FUTURE POWER BLOCK / (\r-----�
FUTURE HEATED WATER �— 1 ` FUTURE UNIT 3
—� ��DISCHARGEDCANAL L.� �^ COOLING TOWER POND
1 FUTURE HEATED WATER / /--�
HYCO RIVER dDISCHARGE POND i-----==�/el
/ J� / \ i FUTURE EAB MAIN DAM f i\FUTURE UNIT 3 HEATED
WATER DID S�CH�ARGE
FUTURE NPDES OUTFALL 003
(
FUTURE HYCO
RESERVOIR
I �
1
II
f I I 1 I11 \\t
I
HYCO RIVER IK ■rai FUTURE EFFLUENT DISCHARGE CANAL I f
I II -
II
FUTURE HYCO� f I \
RESERVOIR I 1
—, DUKE ENERGY PROGRESS
\ ! ' PROPERTY LINE
II WOODLANDELEMENTARYSCHOOL SFM�RARp
1 I I f
SOURCE:
MARCH 12, 1964 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITE
http,.//earthexplorer.usgs.gov/ '
I FUTURE EAST ASH BASIN I
}
W.
' S
FUTURE FILTER DIKE
W
.p,r e • Z�
3ECANAL
*EKj/
FUTURE SEPARATOR DIKE l*
I DUK RGY PROGRE
I I .'t I PROPERTY LINE
;T7yy
r
FUTURE iINDUST2RIALLANDFILL
' f
�! a
FIGURE 1-4
1964 AERIAL PHOTOGRAPH
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
�4
'DUKE 'I ENERGY
PROGRESS
IY
t- 4
Tesynrra
NOT TO SCALE
DRAWN BY: J. CHASTAIN DATE: 1
REVISED BY: DATE: -
CHECKED BY: K. LAWING DATE: 1
APPROVED BY: K. LAWING DATE: 1
PROJECT MANAGER: C. EADY
www.synterracorp.com

ROxgORO P"Aim
PN
SW-1
sFM �j1 � MW-15BR
oRq Ro
• 0 MW-14BR
Ia
1
I y
. � W
1 �
MW-18D ♦�''
- MW-18BR 1,1 -1;
•
,.%;
ke,DUKE
GRAPHIC SCALE
7000 700 1,400
' ENERGY
�
■
(IN FEET)
'
PROGRESS
I
DRAWN BY: J. KIRTZ DATE: 06/11/2019
REVISED BY: C. WYATT DATE: 12/16/2019
1
■
CHECKED BY: K. LAWING DATE: 12/16/2019
APPROVED BY: K. CAWING DATE: 12/16/2019
synTerra
PROJECT MANAGER: C. EADY
www.synterracorD.com
ri
LEGEND
O GROUNDWATER SAMPLE LOCATION
SOIL SAMPLE LOCATION
SEDIMENT SAMPLE LOCATION
SURFACE WATER SAMPLE LOCATION
ASH BASIN WASTE BOUNDARY
- — ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
- SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
• DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
STREAMS (AMEC NRTR)
® WETLANDS (AMEC NRTR)
NOTES
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND AREA MIX OF SURVEYED
AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED
APPROXIMATE.
2. ALL BOUNDARIES ARE APPROXIMATE.
3. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S
INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON
COUNTY GIS.
4. THE WATERS OR THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF
ENGINEERS AT THE TIME OF MAP CREATION. THIS MAP IS A PRELIMINARY JURISDICTIONAL
DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES WERE
OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL& INFRASTRUCTURE, INC. NATURAL
RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC PLANT DATED JUNE
2015.
5. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL
WAS COLLECTED ON JUNE 13, 2016.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
FIGURE 4-1
BACKGROUND SAMPLE LOCATION MAP
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

SITE FEATURES KEY
OGROUNDWATER FLOWS FROM RIDGES THAT COINCIDE WITH GROUNDWATER
DIVIDES WHICH PROVIDE HYDRAULIC CONTROL KEEPING CONSTITUENT MIGRATION
WITHIN THE FORMER STREAM VALLEY AND AWAY FROM POTENTIAL RECEPTORS
AND WATER SUPPLY WELLS
©LIMITED COI MIGRATION THROUGH TRANSITION ZONE AND INTERCONNECTED
BEDROCK FRACTURES. BEDROCK FRACTURE OCCURRENCE AND APERTURE
DIMINISHES WITH DEPTH
© FORMER STREAM CHANNELS IN ASH BASINS
OPONDED WATER IN THE ASH BASIN CAUSES LIMITED AREA OF DOWNWARD
VERTICAL MIGRATION OF CONSTITUENTS NEAR THE DAM/DIKE DUE TO
ELEVATED HYDRAULIC HEAD
©GROUNDWATER DISCHARGES TO INTAKE CANAL AND
HEATED WATER DISCHARGE POND
O DOWNGRADIENT ADDITIONAL SOURCE AREAS CONTRIBUTE TO AFFECTED
GROUNDWATER BEYOND THE COMPLIANCE BOUNDARY
AREA OF COI CONCENTRATION IN GROUNDWATER GREATER THAN CRITERIA
(SEE GENERAL NOTE 1)
FFs► GENERALIZED GROUNDWATER FLOW DIRECTION
FFs► GENERALIZED ASH PORE WATER FLOW DIRECTION
-- APPROXIMATE FORMER STREAM WITH FLOW DIRECTION
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
®GENERAL AREA OF WATER SUPPLY WELL USERS
(SEE GENERAL NOTE 2)
- - GENERALIZED BEDROCK FRACTURE
F- EAST ASH BASIN CONCEPTUAL
CROSS-SECTION OF PRE -DECANTING CONDITIONS I
(NOT TO SCALE - APPROX. 2,000 LINEAR FEET)
IA
ASK GYPSUM
TRANSITION / STORAGE
ZONE 2 AREA
6
BEDROCK
I WEST ASH BASIN CONCEPTUAL
I CROSS-SECTION OF PRE -DECANTING CONDITIONS
(NOT TO SCALE - APPROX. 1,000 LINEAR FEET)
IP �......�,.
11i r
� \ I
GENERAL NOTES
1) GENERI
NCAC 0;
2) PERMAI
SO SURF
THIS W(
SUBSE(
3) ALL BO
G

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

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure 5-3
General Profile of Ash Basin Pre -
Decanting Flow Conditions In The
Piedmont
Provided In Section 5 Text

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure 5-4a
Water Level Map — East Ash Basin —
Transition/Bedrock Flow Zone
Provided in separate electronic figure file as a
large sheet size

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure 5-4b
Water Level Map - West Ash Basin -
Transition/Bedrock Flow Zone
Provided in separate electronic figure file as a
large sheet size

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DUKE GRAPHIC SCALE FIGURE 5-5a
390 0 390 780
*� • #� �� ENERGY VELOCITY VECTOR MAP
, / - ' • - (IN FEET) FOR PRE -DECANTING CONDITIONS
•' PROGRESS DRAWN BY: J.KIRTZ DATE:06/06/2019 TRANSITION FLOW ZONE (LAYER 13)
REVISED BY: A. ROBINSON/K. DATE: 12/20/2019
! •. �/' I l ! s �� �� CHECKED BY:K.LAWING DATE:12/20/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: K.LAWING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
synTerra PROJECT MANAGER: C. EADY SEMORA, NORTH CAROLINA
■ www.synterracorp.com

NOTES:
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DUKE 400 0 400 800FIGURE 5-5b
VELOCITY VECTOR MAP
(IN FEET) FOR CLOSURE -IN -PLACE CONDITIONS
- PROGRESS DRAWN BY: J.KIRTZ DATE:06/06/2019 TRANSITION FLOW ZONE (LAYER 13)
• + REVISED BY: A. ROBINSON DATE: 12/20/2019
r ♦fit♦♦ I _ `� CHECKED BY: K.LAWING DATE:12/20/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: K.LAWING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
synTerra PROJECT MANAGER: C. EADY SEMORA, NORTH CAROLINA
www.synterracorp.com

NOTES:
1
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390 0 390 780
f 1 �� ENERGY VELOCITY VECTOR MAP
' r (IN FOR CLOSURE -BY -EXCAVATION CONDITIONS
+f A` l PROGRESS DRAWN BY: J.KIRTZ DATE:06/06/2019 TRANSITION FLOW ZONE (LAYER 13)
r / •, REV IBEDBY: ALAWI DATE:12/20/2019
CHECKED BY: K.. L4WING DATE: 12/20/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: K.LAWING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
synTerra PROJECT MANAGER: C. EADY SEMORA, NORTH CAROLINA
www.synterracorp.com

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f • J 1 f d . (IN FEET) FOR PRE -DECANTING CONDITIONS
•— '� '� .� '1 f % .� PROGRESS DRAWN BY: J.KIRTZ DATE:06/06/2019 f BEDROCK FLOW ZONE LAYER 15
r• �"r n� / 1• f f t REVISED BY: A. ROBINSON DATE: 12/20/2019
*� '� ♦♦ I %, J J► / / �•� ■ �� CHECKED BY: K. LAWING DATE: 12/20/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: K. LAWING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
�♦ PROJECTMANAGER:C.EADY SEMORA, NORTH CAROLINA
synTerid
j r / www.synterracorp.com

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LE
t �'r�t— � l f •�' r f DUKE 400 ORAPHICSC400 800 FIGURE 5-6b
VELOCITY VECTOR MAP
/ ' • *�ENERGY (IN FEET) FOR CLOSURE -IN -PLACE CONDITIONS
PROGRESS DRAWN BY:J.KIRTZ DATE:06/06/2019
/ / t / • BEDROCK FLOW ZONE (LAYER 15)
REVISED BY: A. ROBINSON DATE:12/20/2019
CHECKED BY: K.L4WING DATE:12/20/2019 CORRECTIVE ACTION PLAN UPDATE
APPROVED BY: K. L4WING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
r+ ^ . �" • ` PROJECT MANAGER: C. EADY
• �/r�Terra SEMORA, NORTH CAROLINA
1 j %'�/ 1 1 - - " www.synterracorp.com

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VELOCITY VECTOR MAP
f f *�ENERGY • ffff (IN FEET) FOR CLOSURE -BY -EXCAVATION CONDITIONS
PROGRESS DRAWN BY: J. KIRTZ DATE: 06/06/2019
■� `"! REVISED BY: A. ROBINSON DATE:12/20/2019 BEDROCK FLOW ZONE (LAYER 15)
l
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fr f f r J - ' AP PROVED BY:K.LAWING DATE:12/20/2019 ROXBORO STEAM ELECTRIC PLANT
r+ �" • ` PROJECT MANAGER: C. EADY
•— • r % t ynSEMORA, NORTH CAROLINA
sTerra
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�I
,r
p mom
� HYCO II �
INTAKE l� ` 1 M a
RESERVOIR UNIT 3 COOLING CANAL � ,GYPSUM �� � y `,,��� ��'� � `■
� ��
ELECTRICAL
SUBSTATION
HEATED WATER \> _ \ • `�'��
DISCHARGE PONDNO
VA�� • �1 r���F ��
BASIN %RA R DIKE_
� HYCO ► /� LV
RESERVOIR i1 � y � - ��� � _ mi� .. • 11
LCID LANDFILL ► ^ - • 1 ��
1
INDUSTRIAL :f ®V �■� ���� �' �
LANDFILL
I
�l r
1
WATERSUPPLYWELL
,� ��►;
116 -ASH BASIN WASTE BOUNDARY
--- ASH BASIN COMPLIANCE BOUNDARY
--- 0.5-MILE RADIUS FROM ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
mow wmk)
NOTES
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND AREA MIX OF SURVEYED AND
I Wro 11"
APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED APPROXIMATE.
all 2ALL BOUNDARIES ARE APPROXIMATE.
OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON COUNTY G IS,
IN
ENGINEERS AT THE TIME OF MAP CREATION.THIS MAP IS A PRELIMINARY JURISDICTIONAL
D TERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES WERE OBTAINED
FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL RESOURCE
TECHNICAL REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC PLANT DATED JUNE 2015.
5. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL WAS
6 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
>�z /
'\► FILTER DIKE r M`�.1
��• /
� /. � w ♦ �� _� ail ��� ,UPDATE.
�I(IIIa*�ENERGY (JN FEET) WATER SUPPLY WELL SAMPLE LOCATIONS
DRAWN BY: C. WYATT DATE: 12/05/2019 CORRECTIVE ACTION PLAN UPDATE
REVIS
BY. K. LAWING DATE:
PROGRESS
APPROVEDol
: ■ .
SEMORA, NORTH CAROLINA
: �jPROJECT MANAGER: C. EADY
'��rr.�w•_..�s�n.�ra�:wi�trrr.►���.,wer«+��-��1`ii��w�` �/! ��\� i����. '1\ • ■

FOR
ADD
THE NORTH
SEE INSET
TO
THE NORTH SEE INSET A / I ..�►' ' ,
01
O
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Q
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. _
1 •77
LEGEND
_ J WATER TREATMENT SYSTEM
OPT OUT OR NON -RESPONSIVE
• . °
LOCATIONS DEEMED NOT ELIGIBLE PER HOUSE BILL 630
(BUSINESS/CHURCH/SCHOOL) BUT VOLUNTARILY
• SUPPLIED PERMANENT WATER SOLUTION
♦ . • OVACANT PARCELS WITHIN HALF -MILE RADIUS
Y RD �
' • WATER SUPPLY WELL
DUNNAWA�
O�` © ♦�• ASH BASIN WASTE BOUNDARY
d �•� — - — ASH BASIN COMPLIANCE BOUNDARY
\
• C, 0.5-MILE RADIUS FROM ASH BASIN COMPLIANCE
_BOUNDARY
I SOLID WASTE LANDFILL BOUNDARY
Q
• �� SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
• ♦ • ' • DUKE ENERGY PROGRESS PROPERTY LINE
a i
♦' \ ° ` EFFLUENT DISCHARGE CANAL
�' Q • Q D TOPOGRAPHIC CONTOURS (10' INTERVAL)
• - - — - - %' /// Y e • - I STREAMS (AMEC NRTR)
♦i 6 a NOTES WETLANDS (AMEC NRTR)
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF SURVEYED AND
APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED APPROXIMATE.
2. ALL BOUNDARIES ARE APPROXIMATE.
- ` 3. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S INTERPRETATION
♦ OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON COUNTY GIS.
O
4. THE WATERS OR THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS OF
' ENGINEERS AT THE TIME OF MAP CREATION. THIS MAP IS A PRELIMINARY JURISDICTIONAL
`` `- • DETERMINATION ONLY. FFROM AMECOSTER WHEELWETLANDS BOUNDARIES EOBTAINED
ER ENVIRONMENTAL ENTAL& INFRASTRUCTURE, NATURALRE RESOURCE
TECHNICAL REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC PLANT DATED JUNE 2015.
_ 5. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL WAS
• COLLECTED ON JUNE 13, 2016.
(\\ ♦ 6. DRAW ING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
\ .!/./�,�j ♦ SYSTEM FIPS 3200 (NAD83).
L ♦�♦ • J-- ♦ ♦ 7. 0.5-MILE RADIUS DRAWN FROM ESTABLISHED COMPLIANCE BOUNDARY OF THE IM POUNDM ENT AS
DEPICTED IN THE 2017 CSA UPDATE.
OQO ', + GRAPHIC SCALE
DUKE 770FIGURE 5-7b
'0 770 1,e40 HB630 PERMANENT WATER SUPPLY
1* ENERGY (IN FEET)
O ` % PROGRESS COMPLETION MAP
DRAWN BY: C. WYATT DATE: 12/05/2019
REVISEDBY: C.WYATT/K.KING DATE:12/12/2019 CORRECTIVE ACTION PLAN UPDATE
A PROVDBv:K.CAWING DATE:12/12/2019 ROXBORO STEAM ELECTRIC PLANT
APPROVED BY: K. CAWING DATE: 12/12/2019
9Ra ' 1"=1,500' FORADDITIONALAREASTO synTerra PROJECT MANAGER: C.EADv SEMORA, NORTH CAROLINA
THE SOUTH SEE INSET B www.synterracori).com

1A\��
me: rA;zl lc.,
W
HYCO
SERVOIR
�111`
COA
,' PILI
s�
O � a, ♦ F �R4 R
0 \ `
NOTES:
1. THE INTAKE CANAL (HYCO RESERVOIR) IS A RECEIVING WATERBODY (CLASS B, WS-V) COVERED BY
SOC NO. S18-005.
2. GROUNDWATERTO SURFACE WATER (02L-02B) SAMPLES WERE COLLECTED TO ASSESS WHETHER
GROUNDWATER MIGRATION IS CAUSING CONSTITUENT CONCENTRATIONS IN THE INTAKE CANALTO
BE GREATERTHAN THE APPLICABLE 02B STANDARDS. 02L-02B SAMPLING WAS CONDUCTED FROM
APRIL 30, 2018 TO MAY 3, 2018 FOLLOWING DIVIDION APPROVED LOCATION AND PROTOCOLS. IN THE
FIVE DAYS PRIOR TO SAMPLING 0.65 INCHES OF RAINFALL WAS OBSERVED AT THE ROXBORO STEAM At
ELECTRIC PLANT. DURING THE FOUR DAY SAMPLING EVENT, NO RAINFALL WAS OBSERVED AT
ROXBORO STEAM ELECTRIC PLANT.
3.) SUPPLEMENTAL 02L-02B SAMPLES WERE COLLECTED TO ASSESS WHETHER GROUNDWATER ,
MIGRATION IS CAUSING CONSTITUENT CONCENTRATIONS IN STREAM 11ATO BE GREATER THAN THE
APPLICABLE 02B STANDARDS. SUPPLEMENTAL 02L-02B SAMPLING WAS CONDUCTED FROM MAY 20,
2019 TO MAY 23, 2019 FOLLOWING DIVISION APPROVED LOCATION AND PROTOCOLS. IN THE FIVE
DAYS PRIOR TO SAMPLING AND DURING THE FOUR DAY SAMPLING EVENT, NO MEASURABLE
RAINFALL WAS OBSERVED AT ROXBORO STEAM ELECTRIC PLANT.
4. DISSOLVED COPPER CONCENTRATIONS WERE GREATER THAN THE APPLICABLE 02B STANDARDS
AT THE FOLLOWING 02L-02B SAMPLE LOCATION: RSW-4.
5. NO COI CONCENTRATIONS WERE GREATERTHAN THE APPLICABLE 02B STANDARDS IN 02L-02B
SAMPLES COLLECTED AT THE ROXBORO STEAM ELECTRIC PLANT.
6. THE WATER 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 A PRELIMINARY JURISDICTIONALDETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS BOUNDARIES WERE OBTAINEDLaVFROM AMEC FOSTER WHEELER ENVIRONMENTAL& INFRASTRUCTURE, INC. NATURAL RESOURCE
TECHNICAL REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC PLANT DATED JUNE 2015.
R.�A`R�'-`� RSW, _�� � ��.r✓/�!
P.
P
i
7 EAST ASH W% I
BASIN
LANDFILLLIj®�
1 A'fr!>. '�►y��`I^�+^-1 � � �.��� =ter �� � � /
i — LCID LANDFILL i \►
r f 1y
• v v LEGEND
d
11A STREAM 11A AREA � ■ ozL-oze SAMPLE LOCATION
■ SURFACE WATER SAMPLE LOCATION
.Q • ` '
CONSTRUCTED SEEP (APPROXIMATE)
7 \ DUNN,AWAY RD NON -CONSTRUCTED SEEP (APPROXIMATE)
DISPOSITIONED SEEP (APPROXIMATE)
(� ❑ IN -STREAM SURFACE WATER SAMPLE LOCATION PER SOC (APPROXIMATE)
A NPDES OUTFALL LOCATION
.. •
_ �� � ♦ ASH BASIN WASTE BOUNDARY
_ - ASH BASIN COMPLIANCE BOUNDARY
0.5-MILE RADIUS FROM ASH BASIN COMPLIANCE BOUNDARY
% SOLID WASTE LANDFILL BOUNDARY
° y SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
• DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
TOPOGRAPHIC CONTOURS (10' INTERVAL)
e3110 STREAMS (AMEC NRTR)
WETLANDS (AMEC NRTR)
V
"§. NOTES:
�} 7. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S
S./ INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT PERSON
F COUNTY GIS.
t• B. ALL BOUNDARIES ARE APPROXIMATE.
9. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF SURVEYED
AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE DEEMED
' • APPROXIMATE.
a
10. SPECIAL ORDER BY CONSENT (SOC) LOCATIONS ARE DESCRIBED IN SOC WQ 518-005.
11. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL
WAS COLLECTED ON JUNE 13, 2011
12. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
Ik u SYSTEM FIRS 3200 (NAD83).
e \ 1 O-� 13. 0.5-MILE RADIUS DRAWN FROM ESTABLISHED COMPLIANCE BOUNDARY OF THE IMPOUNDMENT
\74 AS DEPICTED IN THE 2017 CSA UPDATE.
%' DUKE 800 GORAPHICSCA800 1,600 FIGURE 5-8
1* ENERGY MAP OF SURFACE WATERS
o (IN FEET)
,. PROGRESS DRAWN BY: J.KIRTZ DATE:06/11/2019 CORRECTIVE ACTION PLAN UPDATE
•b . � � REVISED BY: C. WYATT DATE: 12/19/2019 ROXBORO STEAM ELECTRIC PLANT
• • _ ' CHECKED BY: K. LAWING DATE: 12/19/2019
V _ APPROVED BY: K.LAWING DATE: 12/19/2019 SEMORA, NORTH CAROLINA
synTerra PROJECT MANAGER: C. EADY
www.synterracorp.com

ROXgORO P V PNI�
. — t
f �
� � I w f � I ` •�y
r DUNNAW.
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r •
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1
f
1 �
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♦1�
J
L
•I D U KE GRAPHIC SCALE
700 0 700 1,400
ENERGY
(IN FEET)
IPROGRESS
DRAWN BY: J. KIRTZ DATE: 06/11/2019
REVISED BYA. ROBINSON DATE: 12/16/2019
1
CHECKED BY: K. LAWING DATE: 12/16/2019
/
APPROVED BY: K. CAWING DATE: 12/16/2019
PROJECT MANAGER: C. EADY
s)mTerra
I www.s nterracor .com
LEGEND
SOURCE AREA 1
SOURCEAREA2
L :: ISOURCEAREA3
-ASH BASIN WASTE BOUNDARY
- ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
• - SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
LINED LANDFILL LIMIT OF WASTE
EFFLUENT DISCHARGE CANAL
STREAMS (AMEC NRTR)
® WETLANDS (AMEC NRTR)
NOTES
1. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCESAND AREA MIX OF SURVEYED
ANDAPPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONSARE TO BE DEEMED
APPROXIMATE.
2. ALL BOUNDARIES ARE APPROXIMATE.
3. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S
INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIESAND CURRENT PERSON
COUNTY GIs.
4. THE WATERS OR THE US DELINEATION HAS NOT BEENAPPROVED BY THE USARMY CORPS OF
ENGINEERS ATTHE TIME OF MAP CREATION. THIS MAP ISA PRELIMINARY JURISDICTIONAL
DETERMINATION ONLY. THE PRELIMINARY WETLANDSAND STREAMS BOUNDARIES WERE
OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL & INFRASTRUCTURE, INC. NATURAL
RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO STEAM ELECTRIC PLANT DATED JUNE
2015.
5. AERIAL PHOTOGRAPHY OBTAINED FROM GOGGLE EARTH PRO ON OCTOBER 11, 2017. AERIAL
WAS COLLECTED ON JUNE 13, 2016.
6. DRAWING HAS BEEN SET WITHA PROJECTION OF NORTH CAROLINASTATE PLANE COORDINATE
FIGURE 6-1
MAP OF SOURCE AREAS
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure 6-2
Fly Ash and Bottom Ash Interbedded
Depiction
Included in Section 6 text

A A'
(NORTH)
�-� DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE EAST ASH BASIN / INDUSTRIAL LANDFILL
COMPLIANCE BOUNDARY
(SOUTH)
APPROXIMATE EAST ASH
BASIN WASTE BOUNDARY �w
m
�
rn m U w
ao — LU
N uj
O M 0
�3: 0� r
500 I 7 a
soo
m mAPPROXIMATE PHASE 6
grw
NNN-
APPROXIMATE PHASE 1-5 ENGINEERED BASE �tiY �i '�fi d'ti O 1✓ r Y�. lr Ir \r 1/r✓ y�
�j o__________________ ENGINEERED BASE LINER ELEVATION 1.�i?\' f`
w
---------------------------------------
___________C14___ LINER ELEVATION '�'i$ '',l. zd.
550 m C9 0 ------------------=--ASH=-==--_--_--_--_ - -_ - _-_-_-- td�Y4 550
GYPSUM ¢ w -- -- I
STORAGE REGOLITH
� a --------------------------_------_--_--_--_------------ =ASH-------------
AREA ¢ j -_-__ __-_-_-_- _____� -_- - _________________________ _ ________________
0 0 - - - - - --- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- - STRUCTURAL _
500 s SOIL FILL w_______ FILL \ - - \� 500
aa z --= --= --= --=------------------------------------= --= --=------------= --= --= -_= --= --= --= --= -
- ------o STIR T'�.
--
_-______________i-'\_\i
n1 Q iFCLL
-------------------------_-_-_-_-_-_-__-_Z
-
450 I UO �' /1;'\/\ - ASH PORE--=--------------- \/\'/1"\/\'/1��\/\'/1 �\\'/1���/\'/1"\/\'/1���/\'/1`\/\'/1���/\'/1"\/\'/1���/\'/1"\/\'/1���/\'/1"\/\'/1���/\'/1"\/\'/1"-/\'
D _ _=______ _____ _ _ _ ____ WATER - -_ _ --_ / /
w� a f l-I -\ 84.60' / \ \',-------- \-1'/- \ \'' \-1'/- '' \-1'/�,y�•
aW /\�:/"`_./. �:`r/I�`_________________ -- ,;;
ZW 55' --
/\; /r1-'\\'\/.' ./-/ 1BI"E, DR�O\Clr- r
REGOLITH
400-400 .
413.77' r
350 / \i l �`r I � \ \ l / i t / I \ \ l/-i l i l I \ \ l/ i lily`/ I � \ \ // i /i l �`/ I � \ \ l/-i l i l �`r I � \ \ l/-i l i / ��r l � \ \ l/ i l i l ��r l \ \ l/ l i l ��/ I \ \ // i /i l �\/ I \ \ l / i lily`/ 1 � \ \ l/-i l i l �`r I � \ \ l �- `�� � \; \ i � i _ \ i �`/ 1 � \ \ / r-i _ \ 1 ��7- \ / r-i 350
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BEDROCK:1\'_
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--
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/
EAST ASH
-200 BASIN
'//1"\/\'/1
WEST ASH
BASIN
LEGEND NOTES DUNNAWgy RD
MW-16D WELL IN TRANSITION ZONE TRANSITION ZONE FLOW LAYER GROUNDWATER 1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR APRIL 22-23, 2019
MW-16BR WELL IN COMPETENT BEDROCK LEVEL ELEVATION FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE MEASURED IN THE SAME DAY.
REFERENCED TO NORTH AMERICAN VERTICAL DATUM, 1988.
MY-1001 WATER SUPPLY WELL BEDROCK FLOW LAYER GROUNDWATER 2, DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER
LEVEL ELEVATION 31, 2015.
GENERALIZED WATER TABLE WATER LEVEL ELEVATION (NAVD 88) 3. FRACTURE OCCURRENCE AND ORIENTATION NOT DEPICTED.
won-*- GENERALIZED GROUNDWATER (LABEL COLORING BY FLOW ZONE) NO GEOPHYSICAL LOGGING CONDUCTED IN DEEP BEDROCK BOREHOLES SHOWN ON sgyD NOTE:
FLOW DIRECTION CROSS-SECTION. CROSS SECTION A -A' IS LINEAR IN NATURE AND NOT
ALL THE CSS
GENERALIZED SUBSURFACE ASH WELLSCREEN 4. ALL BOUNDARIES ARE APPROXIMATE. /N sr� PROJE TEDDNS O TOLONG TTHECROSS 8 CTON.TIONARE
PORE WATER FLOW DIRECTION
LITHOLOGIC CONTACT — — — COMPLIANCE BOUNDARY CROSS SECTION LOCATION
0 ASH WASTE BOUNDARY
0 ASH PORE WATER GRAPHIC SCALE
BEDROCK DUKE 0 100 250 500
0 FIGURE 6-3
ENERGY HORIZONTAL SCALE: 1" = 500'
REGOLITH VERTICAL SCALE: 1" = 100' GENERAL CROSS-SECTION A -A'
0 SOIL FILL 5XVERTICAL EXAGGERATION EAST ASH BASIN
PROGRESS DRAWN BY: A.FEIGL DATE: 08/02/2019
® STRUCTURAL FILL REVISED BY: D. KREFSKI DATE: 12/12/2019 CORRECTIVE ACTION PLAN UPDATE
SURFACE WATER CHECKED BY: K. LAWING DATE: 12/12/2019
161P APPROVED BY: C. EADY DATE: 12/12/2019 ROXBORO STEAM ELECTRIC PLANT
1 GENERALIZED VERTICAL PROJECT MANAGER: C. EADY SEMORA, NORTH CAROLINA
TLAYOUT: SECTION A -A' (6-3)
HYDRAULIC GRADIENT syneiid
www.synterracorp.com

i:3
3
600
550
500
(NORTHWEST)
INTAKE
450 CANAL
WATER ELEV.
I, =409.0
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE EAST ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE EAST ASH BASIN WASTE BOUNDARY
(SOUTHEAST)
0
�
w
w Z
w
J
Z J
U W
z o
w
0
w
in w
w
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r,r v „
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r — Wi
------------------
APPROXIMATE TOP OF DAM ATTHE-===----------------
---------- -EASTERN IMPOUNDMENT IN1993 AERIAL-----,-__ ___ ___________ ASH PORE
���� - _____ ASH -
-► - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ ASH PORE WATER =Iol
-_� WATER WATER ELEVATION =465'l'`� \ " \ i `� I ; - \ /\- " \ j /`� - \-- j /`� - \ '
--- _----_- ---_=-=i- -— — — — — — — — -
- _ REGOLITH 472.39
,�_
/ WATER ELEVATION=409' x N� / I - \I i l\, / I , \I i \ / I \/i \ / I' \l i \ / I , \/ / \ / I , \/ i / 1 / \/ l \ r I , \, , _ ,� i \ i , v - •i i \�-1-V� �\ r I ' \l i \ / I , \l i ♦ / I \l ���- / \ / I' \/i / \ / I , \/ TT�/ I ' \/i l \ / I' \l i / \ / I \/i l \ I
,-\/400- \, ram\ I ram\
419.30'\r\,r\,
I \ ` \ I
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BEDROCK R
l`
/ r
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♦/ ,\I \/'I \/ / I ♦/ I ♦/ / I ♦/ , / / I ♦/ I ♦/ / I \/ I / / I \/ \/ / I \/- \/ / I ♦/ I \/ , ♦/- I` \/
\i.\l ./ .I♦ // \- . I. \II``/,\♦///r�\_\. mi/,'.♦II ./ .I\\ /// \-.'1. \I `/\,\\,//r�\ \mi/�l.\II./ .I\///�\- \ ,l.\I�`/`/1I\,\,/i�\\.-�/d'1.\Il ,�/I♦// \ \ l \ 1\I,\,/ TESIAWELL
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1\I\,
LEGEND
;�� ' _I���i\' PZ-12 PIEZOMETER ASH PORE WATER
`\ ``r'/ -, / ABMW-7 WELL IN ASH PORE WATER LEVEL ELEVATION NOTES
200v TRANSITION ZONE FLOW LAYER
N N �
UNIT 3
COOLING
TOWER POND
---------------
-----------=====ASH--
m m m
== _=--AP_PROXIMATE
_ _______=ENGINEERED BASE=
___==LNER ELEVATIO
EAST ASH BASINO
Oa�N�
SEPARATOR DIKE
Q
__ __ __
- _- -
a
-
an
a a
a
====--
---------------------
/_,
GMW-2 WELL IN TRANSITION ZONE
GROUNDWATER LEVEL ELEVATION
1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR APRIL 22-23, 2019
/ i % \/� / �`/ i : \/: ���/ i % \/� /
_,\'
r i % y / ;
ABMW-7BR WELL IN COMPETENT BEDROCK
0
BEDROCK FLOW LAYER GROUNDWATER
FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE MEASURED IN THE SAME DAY.
\
I, \\ 1, 1\ 1/ I;
�,
RO4
LEVEL ELEVATION
CTHIS S
\ i �/\ \ \ �� \ ��\ \ \ ��i \ 1 ��. \ 1'/i \ 1,
\
\%,
D W 26
WATER SUPPLY WELL
2. FRACTU ESREFEENCEDCONC CTO ONCEPTH TUALLY DEPICTED ONCCROSS C$TION REPRESENT GENERALIZED
150
\
/ I , \\� �\ / 1 / \ / I , \\� �\ , I / \ / I , \\� �\
` /\ ` /\
, I / � � / \
/\
WATER LEVEL ELEVATION (NAND 88)
COLORING BY FLOW ZONE)
ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING AT THE ABMW-7BRLL
\'i /� , _ \ i ` \'� / , -� i ` \'� / , -� i
e
` \'�
GENERALIZED WATER TABLE
(LABEL
BOREHOLE. THE DEPICTED FRACTURE ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE
GENERALIZED GROUNDWATER
WELLSCREEN
PLANE OF THE CROSS SECTION AND VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES
FLOW DIRECTION
IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF
�� GENERALIZED SUBSURFACE ASH
FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
RHYCOESERVOIR e \ 1
. . _
PORE WATER FLOW DIRECTION
COMPLIANCE BOUNDARY
3. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER
/' �\
GENERALIZED VERTICAL
WASTE BOUNDARY
31, 2015.
POWER PLANT
HYDRAULIC GRADIENT
4. ALL BOUNDARIES ARE APPROXIMATE.
LITHOLOGIC CONTACT
0
ASH
0
ASH PORE WATER/ WASTEWATER
EAST ASH BASIN e'
0
SAPROLITE
®
TRANSITION ZONE
GRAPHIC SCALE
WEST ASH
I
0
BEDROCK
REGOLITH
DUKE
ENERGY
o 100 250 500
HORIZONTAL SCAL:BASIN
VERTICAL SCALE: 1 1100 ��
FIGURE 6-4
GENERAL CROSS-SECTION B-B'
o
SOIL FILL
PROGRESS
5X VERTICAL EXAGGERATION
EAST ASH BASIN
DUNNAWAv RD
®
STRUCTURAL FILL
DRAWN BY: A.FEIGL DATE: O8/02/2019
REVISED BY: D. KREFSKI DATE: 12/12/2019
CORRECTIVE ACTION PLAN UPDATE
NOTE:
NOT MEASURED
CHECKED BY: K. LAWING DATE: 12/12/2019
ROXBORO STEAM ELECTRIC PLANT
rv, CROSS SECTION B-B' IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
_ _
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
161PAPPROVED
BY: C.EADY DATE: 12/12/2019
PROJECT MANAGER: C. EADY
SEMORA NORTH CAROLINA
'
PROJECTED ONTO THE CROSS SECTION.
LAYOUT: SECTION B-B'(6-4)
CROSS SECTION LOCATION
�
SURFACE WATER
I
...�� ■ ■T��
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,.
PRE -DECANTING CONDITIONS
- POST CLOSURE CONDITIONS
FOR CLOSURE -IN -PLACE
.
I
oil
1If
it
UIC
�-• ��`1��1�� l� `'i ' ��� � � ^
`,,..�
%
,�
{ M ♦
/
. e
I
•:
SATURATED ASH
THICKNESS (FEET)
SATURATED ASH
THICKNESS (FEET)
ter.
♦ _
♦
'
. �+�.
.
r
,y
. ._. �
it • � .
-
_
' DUKE
l'
375 GRAPHIC SCALE
0 375 75o
FIGURE 6-5
ENERGY
SATURATED ASH THICKNESS MAP
_
PROGRESS
(IN FEET)
PRE -DECANTING AND CLOSURE -IN -PLACE CONDITIONS
EAST ASH BASIN
DRAWN BY:C.WYATT DATE:10/30/2019
}
REVISED BY. C. WYATT/K. KING DATE:12/12/2019
CHECKED BY: K. LAWING DATE: 12/12/2019
APPROVED BY: K.LAWING DATE:12/12/2019
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
®
s)mTerra
PROJECT MANAGER: C.EADY
SEMORA, NORTH CAROLINA
www.synterracorp.com

A ---a
(NORTH)
- A'
(SOUTH)
I� DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE EAST ASH BASIN / INDUSTRIAL LANDFILL
COMPLIANCE BOUNDARY
I
APPROXIMATE EAST ASH
BASIN WASTE BOUNDARY
600
do
550
m �
N N
GYPSUM
STORAGE
a a
AREA
cn
SOIL FILL \
500
I
Q
STRUCTURAL
o FILL
450
Z II
Qz
O
z�
J
-_-_------ ----
041 N____________________________________= APPROXIMATI
===================================== ENGINEERED
2 o
LINER ELEVAI
o 0 ASH =====__________--_
w_ ________
400 REGOLITH _
a
350 / i / \�/ I \ 1 i / cwnvo
300
'BEDROCK,,
200
LEGEND
MW-16D WELL IN TRANSITION ZONE
MW-16BR WELL IN COMPETENT BEDROCK
J
i L
m
m W
U
N -
m
w
O
2
p
0 E D-
yr yr
Y
yi
r
rt
w
� I
APPROXIMATE PHASE 6
1-5 ENGINEERED BASE
QO
/LINER ELEVATION
„
/,� ✓
y� yr.*1'r`
zt;r`ij` V
Y Y Y
-- - - - - - - ASH _ REGOLITH
o w __-__---------------__--_--_--_--_--_--_____-___-- ___--_--_--_--_--_- ----- ---- _ __ __--
------------------------------------ -------------------------------
-------------------------_---_---__-_________------ ___= STRUCTURAL ---- — _
FILL\ -I ` - / — l \ \ \,l `r+Tll/\ \ , I�
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M W 139
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a ____ < Sao / �\ /1, / �\ ♦ /1, �\ /1,\/\ /1/.
.-7777
\ -__-_ -_ ____
_ ______
/1\�\/\ --------- -- ASH PORE--==_-____________/I"\/\I/1\�
\'/ --=- =4�= WATER
\/\/1 \ /1, \/� /1 '
/.-BEDROCK'- \- \'/.-- \
_ \ / . / - - ♦ . / _ - / \ � `��+� ,I � \/ i ♦. I' \/� � I � \� � � . /I / \/ `� \ ,I � \li \; 1 \l i � 1 � \/ ; i . /I � \/ ; � \ ,I � \/i ♦` I / \li \ I ! \/ ; i . /I � \/ ; � \ ,I � \li ♦; I / \/i \ I � \li ♦; I � \l i \ 1 � \ /
1,�\/\I/1`�\/\I/1, �\/♦'/1`�\/\I/1/�\/\I/1` �\/\I/1/�\/\I/1` �\/\'/1, �\/\I/1` �\/♦'/1\ �\/\I/1\ �\/\'/1, �\/♦'/1`�\/♦I/1, �\/\'/1` �\/♦I/1, �\/\I/1` �\/\'/1, �\/\I/1` �\/\'/1,�\/\I/1`�\/♦'/1, �\/♦'/1`�\/♦I/1, �\/\'/1\
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BEDROCK./\%
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_NOTES:
1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN \ - \'/ -'� - \'' - \ - \'/ -'� - \'' - \ - \'/ -'� - \'' - \ - \'/ -'\ - \ EAST ASH
BASIN
`\ \,,,I'CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
/ 1
.USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019. / �
�.'.I _ ?.'.I WEST ASH
-2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER - - - BASIN
LITER (w4/L)
TRANSITION ZONE FLOW LAYER
GROUNDWATER LEVEL ELEVATION
MY-1001 WATER SUPPLY WELL
BEDROCK FLOW LAYER GROUNDWATER
LEVEL ELEVATION
_ I _ GENERALIZED WATER TABLE
MEAN BORON (B) CONCENTRATION (ug/L)
GENERALIZED GROUNDWATER
6
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
�►
FLOW DIRECTION
ns
oo
MEAN TOTAL DISSOLVED SOLIDS (TDS)
GENERALIZED SUBSURFACE ASH
CONCENTRATION
PORE WATER FLOW DIRECTION
WELL SCREEN
LITHOLOGIC CONTACT H
ASH — — — COMPLIANCE BOUNDARY
0 ASH PORE WATER WASTE BOUNDARY
0 BEDROCK
REGOLITH
SOIL FILL
® STRUCTURAL FILL
SURFACE WATER
GENERALIZED VERTICAL
HYDRAULIC GRADIENT
NS NOT SAMPLED
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATIONS ARE IN MILLIGRAMS PER LITER (mg/L)
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR
VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP TO
JUNE 2019 WAS USED.
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B SO4 TDS
REPORTING UNITS
Ng/L
15A NCAC 02L STANDARD
700
BACKGROUND THRESHOLD
VALUES
50
(TRANSITION FLOW ZONE)'
BACKGROUND THRESHOLD
VALUES
50
(BEDROCK FLOW ZONE)'
mg/L mg/I
250 500
NOTES
1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR
APRIL 22-23, 2019 FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE
MEASURED IN THE SAME DAY. REFERENCED TO NORTH AMERICAN VERTICAL
DATUM, 1988.
2. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP
TO DECEMBER 31, 2015.
3. FRACTURE OCCURRENCE AND ORIENTATION NOT DEPICTED.
NO GEOPHYSICAL LOGGING CONDUCTED IN DEEP BEDROCK BOREHOLES SHOWN ON
CROSS-SECTION.
4. ALL BOUNDARIES ARE APPROXIMATE.
38 710 �� DUKE
ENERGY
69 560 PROGRESS
1 - BACKGROUND THRESHOLD VALUES WERE CALCULATED
USING DATA FROM BACKGROUND GROUNDWATER SAMPLES
COLLECTED NOVEMBER 2010 TO DECEMBER 2018 AS SUBMITTED
JUNE 2019.
L'
synTerra
GRAPHIC SCALE
0 100 250 500
HORIZONTAL SCALE: 1" = 500'
VERTICAL SCALE: 1" = 100'
5X VERTICAL EXAGGERATION
DRAWN BY: A.FEIGL DATE: 08/02/2019
REVISED BY: D. KREFSKI DATE: 12/12/2019
CHECKED BY: K.LAWING DATE:12/12/2019
APPROVED BY: C. EADY DATE: 12/12/2019
PROJECT MANAGER: C. EADY
LAYOUT: SECTION A -A' (6-6A)
www.synterracorp.com
NOTE:
CROSS SECTION A -A' IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
FIGURE 6-6a
GENERAL CROSS-SECTION A -A'
EAST ASH BASIN - CONSERVATIVE GROUP
MEAN OF BORON, SULFATE AND TOTAL
DISSOLVED SOLIDS
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

A AV
(NORTH)
O m
GYPSUM
STORAGE
a a
AREA
\
s SOIL FILL
U
61
Q
STRUCTURAL
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o FILL
z II
O
y j
Q
�
w
z w
/ t
(SOUTH)
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE EAST ASH BASIN / INDUSTRIAL LANDFILL
COMPLIANCE BOUNDARY
APPROXIMATE EAST ASH
mmi
BASIN WASTE BOUNDARY-1
LUm
m
rn
Cep
N
W
m
U
z
w
L
O
LL
t
(n
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_____________ _____
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Lu
1y '1✓ tir r r'Ir
r ry 0
=1
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r
N
N
p
_ ___ ___ ___ ___ ___ __
APPROXIMATE PHASE 1-5
ENGINEERED BASE
LINER ELEVATIONI
!
jr
o
=-------------------------------------=
LINER ELEVATION
(9
p
o J
- - --- --- --- --- --- --- --- --- --- ASH _ --_ --_ --_ --_ --_ --_ --_ -- _ �
-------------- -
-
>
------------
---------------
-
ASH ----
----
v
REGOLITH
0
--------------- -------------------------------------
_- - -- --- --- --- --- --- -----_---_---__ --_ --_ --_ --_ ------_---
--------------------------------------------------------
--------------
STRUCTURAL
-----
_
p_
Z
__ __ __ __
_______________________________________________________________
__ ____-_--_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ --__ --__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-__ -_-_ --_ ---
_\/II
,
j FILL
/// MW-]36R
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-
_
/ \ . I : / I
\_/I\/\II\/\/-\/I\'I
I , -
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Se M 22BR
F 7.7
-350
000
\ \ \
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\ / /
-200 .rl \Nr,/\`mil\
LEGEND
I; N N' -
V
SH PORE \/\/1�\/1, �\\/I�J/1�\/I�\/1�\/I�\/1�\/1\/\/1\\'.�i\I/1`��i\'/I���i\I/1`��i\'/I;
_ WATER
/1�\/♦I/ 1`\/ \ ____/�1\\/\ /1,\/\'/ 1`\/\I/1 ��\/\I/1`\/\'/1��\/\I/1`\/\'/1�\/\'/1`\/\'/1�\/\'/1\\/\I/1�\/\'/1`\/\I/ 1�\/\I/ 1`\/\'/1�\/\I/ 1\ / �/\'/1�\/\I/1�:
J-\�/\-�\-\i/`�- I/
1/;''/1`'''/1`'''/1`'''/1`'/1;��/\'/1`�\/\'/1�'�/\'/1`��/\'''/1`'''/1`'''/1`'''/1`'''/1`I IN
�\/\'/1;'�/\/1
I/\/\/I•\`,\�I/\/\/I•\`,\�I/\//\/I•\`,\/I/\/�\/I•\`�,\/I/\/�\/1•\`�,\' I\`,\�I/\/\/I•\`,\�I/\//\/I•\`,\�1/\/\/I•\`/\/I/\/\/1•\`,\/I/\/\/I•\`�,\�I/\/�\/I•\`�,\�I/\/�\/I.
/1\♦/\I\/"/\'/1\♦/\I`/,/\I/1`\/\I\/"�/♦I/1`�\/\I\/\�`/♦I/1\♦/\I\/`\\'/1\♦/\I\/`/\\'/1`�\/\I\/�/\\/I/1`�\/\I\/\�\\ I/1\�\/\I\/\�\\'/1\�♦/♦I \/\\'/1\�♦/\I \:
\/ \ / /♦/ l ♦\/ I i \ \ /./ i l / l ♦`/ I i \ \ /./ i l / / \\/ I / \ \ l'\/ i l / l \\/ I i \ \ /.� - I j ;\� \ ; \ /./ i / / l \\/ I i \ /\/ i l / l ♦`/ I i \ \ /./ i l / / \\/ I i \ \ /./ i l / / \\/ I i \ \ /./ i l / l \\/ I i \ \ j /./ i / / l ♦`/ I i \ \ /\� _ \
// \ I \ /� ♦ I \ /� ♦ I \ // \ I \ // \ 1 \ // \ I \ /� ♦ I \ /� ♦ I \ I/ \ I \ // \ I \ // \ I \ /� ♦ I \ /� ♦ I
_ \ / - \ / - _ \ / - _ \ / - -
1 N' �/\I/1�'\/\'/1�'/\I/ 1 �'\/\'/1�'/\'/1�'\/\I/1�'/\'/1�\/\I/1�\/\'/1�\/\I/1 �'/\I/1�\/\'/1�'/\I/ j/ 'IN
IN /I ,1i
\`1E \ \/\,\ \;♦� ii`�'\\ri \ /'ter!/ /\\ i `\�//�/i-\�;` i\``���;`i\`\i�/BEDROCK ;� \\\�
BEDROCK / \� / / \/ \ / \ I \ / . \ I \ / . \ 1 \ r . ♦ I \ r
HYCO
�/�\-\%/\�_\-\�/� �\�\j/\�-\-\�/� �\-1%/\�-\-\�/� �\-1%/\7-\-\�/� RESERVOIR
,I=\// \ / I• \// I-\// \ / I_\// I_\// \ / I_\// I_\// \ / 1 \// I_\// \ / 1 \// I-\l/ \ / I_\I/ POWER PLANT
'/1"\/\I/1\/\I/1" \/\'/1\/\I/1"\/\''\/\'/1" \/\'/1\/\'/1"\/\I/1�'\/\'/1" \/
. \`i �\ / I / \ / / / . \`/ / \ / I / \ / / / I • \`/ �\ / I / \ / �\ I • \`� �\ / I / \ / �� / 1 • \`� �♦ / I / \ / �\ I • \`� �\ / I / \ / / / I • \`/ �\ / I / \ / / / . \`/ �\ / 1 / \ i �� / ,
/1
/�;`\��\;.I�\ / i /i �\I�\ \l'\/ i lil\1�\ \l'\/ i li/♦I�\ \l/\/ i l�
- l ei\/'-`_\ \/ - l Ni\ / - l ei\/'-` \ \/ - l ei\/'-`_` \/ - l ;�\/I_\ \ \, _ l/ \ 1 \
_ _ _ NOTES: _ _ _ _ _ _ `' \' -_
''1�'/\I/ �'\/\''I' EAST NH BAS
/,1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN
CALCULATED BASED ON CENTRAL TENDENCY OF DATASET
USING DATA RANGING FROM ]ANUARY 2018 TO DUNE 2019. i'\7-; - \/\-_; - \ �'`�-; - \/`-_; - \ i'`�-; - \/`-_; - \ WEST ASH
/' -'._ BASIN
2. SELENIUM (Se) AND STRONTIUM (Sr) CONCENTRATIONS ARE NOTES
IN MICROGRAMS PER LITER (Ng/L) DUNNAWAV
MW-16D
WELL IN TRANSITION ZONE
v
MW-16BR
WELL IN COMPETENT BEDROCK
MY-1001
WATER SUPPLY WELL
1
GENERALIZED WATER TABLE
_ _
GENERALIZED GROUNDWATER
B
FLOW DIRECTION
ns uoo
GENERALIZED SUBSURFACE ASH
PORE WATER FLOW DIRECTION
—
LITHOLOGIC CONTACT
0
ASH
— — —
0
ASH PORE WATER
0
BEDROCK
0
REGOLITH
0
SOIL FILL
®
STRUCTURAL FILL
SURFACE WATER
GENERALIZED VERTICAL
HYDRAULIC GRADIENT
NS
NOT SAMPLED
TRANSITION ZONE FLOW LAYER
GROUNDWATER LEVEL ELEVATION
* WELLS WITH DATASETS CONTAINING FEWER THAN FOUR
BEDROCK FLOW LAYER GROUNDWATER
VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP TO
LEVEL ELEVATION
JUNE 2019 WAS USED.
MEAN BORON (B) CONCENTRATION (ug/L)
NO DATA AVAILABLE
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
MEAN TOTAL DISSOLVED SOLIDS (TDS)
ANALYTICAL PARAMETER Se Sr
CONCENTRATION (mg/L)
WELLSCREEN
REPORTING UNITS Ng/L Ng/L
15A NCAC 02L STANDARD 20 NE
COMPLIANCE BOUNDARY
BACKGROUND THRESHOLD
WASTE BOUNDARY
VALUES 2 760
(TRANSITION FLOW ZONE)'
BACKGROUND THRESHOLD
VALUES 1 438
(BEDROCK FLOW ZONE)'
' BACKGROUND THRESHOLD VALUES WERE CALCULATED
USING DATA FROM BACKGROUND GROUNDWATER SAMPLES
COLLECTED NOVEMBER 2010 TO DECEMBER 2018 AS SUBMITTED
JUNE 2019.
NE - NOT ESTABLISHED
1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR
APRIL 22-23, 2019 FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE
MEASURED IN THE SAME DAY. REFERENCED TO NORTH AMERICAN VERTICAL
DATUM, 1988.
2. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP
TO DECEMBER 31, 2015.
3. FRACTURE OCCURRENCE AND ORIENTATION NOT DEPICTED.
NO GEOPHYSICAL LOGGING CONDUCTED IN DEEP BEDROCK BOREHOLES SHOWN
ON CROSS-SECTION.
4. ALL BOUNDARIES ARE APPROXIMATE.
4'DUKE
ENERGY
PROGRESS
WnTem
GRAPHIC SCALE
0 100 250 500
HORIZONTAL SCALE: 1" = 500'
VERTICAL SCALE: 1" - 100'
5X VERTICAL EXAGGERATION
DRAWN BY: A.FEIGL DATE: 08/02/2019
REVISED BY: D. KREFSKI DATE: 12/12/2019
CHECKED BY: K. LAWING DATE: 12/12/2019
APPROVED BY: C. EADY DATE: 12/12/2019
PROJECT MANAGER: C. EADY
LAYOUT: SECTION A -A' (6-613)
www.synterracorp.com
NOTE:
CROSS SECTION AA'IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
FIGURE 6-6b
GENERAL CROSS-SECTION A -A'
EAST ASH BASIN - VARIABLE GROUP
MEANS OF SELENIUM AND STRONTIUM
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

(NORTHWEST)
.550
.500
INTAKE
CANAL UNIT 3 �m:
WATER ELEV. COOLING 0 0
=409.0 TOWER POND
250
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE EAST ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE EAST ASH BASIN WASTE BOUNDARY
ASH
--------------- -------------
m m m
r�
o
_______ _--_____________-
APPROXIMATE -______-
________
----------------------------
LINER ELEVATION
o
0 EAST ASH BASIN
SEPARATOR DIKE
Q====
_
----------------
-=-=-=-=-=-_-=
IL
a a a a
------------
-----------------------------------------
---------------- APPROXIMATE TOPOF DAMAT THE-===________________
-----------------
SOIL ASH PORE
EASTERN UNDMENT IN 1993 AERIAL
-----=__=::IM ����� _ - -_-__ ____-- --- ---- -- -- ASH WATER
---- ----- : ASH PORE WATER _ WATER ELEVATION
--- ------
--- REGOLITH -
71
WAI ER ELEVATION=409'/
NS Tos Izsa ` / I. /. \ I . \ i / / / /
'J"C s sago I \`� \/�/, �rl/\`�/\'I/\/\/I
.
/\'/ 1"\/ ♦ I � - � /1�/ \'/ 1"\/ ' 1�/\'/ "
♦` 1 / \/i / \ / I / \/i ♦ / I r \/i l \\/ I / \/i r 1 _ \/••.ABJIW-0]aR \ / . I `/ -
l/I' \//-BEDROCK-
r_ \;
/ ".'../BEDRO
♦'/1 \/\ /1, \/\'/ 1 ' \/ , �\ 'f�C�jl
V ,
♦ \
/
\ _4 \
—
LEGEND
I/\/mil
PIEZOMETER
ASH PORE WATER
(SOUTHEAST)
3. SULFATE (SO4) AND TOTAL DISSOLVED SOLIDS (TDS)
CONCENTRATIONS ARE IN MILLIGRAMS PER LIFER (mg/L)
* WELLS WITH DATASEFS CONTAINING FEWER THAN FOUR
WELL IN ASH PORE WATER VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP TO
LEVEL ELEVATION NOTES JUNE 2019 WAS USED.
\/\/_I,,\/\/1 \/\/_I,,_\/•/_I _\/\/_I,�\/
_I,,_\/• GMW2 WELL INTRANSITIONZONE
TRANSITION ZONE LAYER GROUNDWATER
1.
WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR
WELL IN COMPETENT BEDROCK
LEVEL ELEVATION
APRIL 22-23, 2019 FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE
WATER SUPPLY WELL
V
BEDROE FLOWN LAYER GROUNDWATER
MEASURED INNTHE SAME DAY. REFERENCED TO NORTH AMERICAN VERTICAL
DW--26
DATUM, 1988.
_ GENERALIZED WATER TABLE
e�wwo
MEAN BORON (B) CONCENTRATION (IJg/L)
MEAN SULFATE (SO4) CONCENTRATION (mg/L)
2.
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT
GENERALIZED ORIENTATIONS OF FRACTURES OBSERVED BASED ON TELEVIEWER
GENERALIZED GROUNDWATER
MEAN TOTAL DISSOLVED SOLIDS
LOGGING AT THE ABMW-7BRLL BOREHOLE. THE DEPICTED FRACTURE
FLOW DIRECTION
(TDS)
GENERALIZED SUBSURFACE ASH
CONCENTRATION (mg/L)
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS
HYCO e � �- /
RESERVOIR
/
PORE WATER FLOW DIRECTION
WELL SCREEN
SECTION AND VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS
` / I ` I / \
GENERALIZED VERTICAL
FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN ADDITION, THE DEPTHS
POWER PLANT
HYDRAULIC GRADIENT
AND LENGTHS OF FRACTURES VERSES DEPTH ARE CONCEPTUAL ONLY.
— — —
COMPLIANCE BOUNDARY
3.
DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP
— LITHOLOGIC CONTACT
WASTE BOUNDARY
TO DECEMBER 31, 2015.
0 ASH
4.
ALL BOUNDARIES ARE APPROXIMATE.
NOTE:
CROSS SECTION B-B' IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
ASH PORE WATER / WASTEWATER
0
SAPROLITE
®
TRANSITION ZONE
GRAPHIC SCALE
0 100 250 500
o
BEDROCK
' D UK E
REGOLITH
ENERGY
HORIZONTAL SCALE: 1" =
VERTICAL SCALE: 1" = 100'
SOIL FILL
5X VERTICAL EXAGGERATION
®
STRUCTURAL FILL
PROGRESS
DRAWN BY: A.FEIGL DATE:08/02/2019
REVISED BY: D.. I DATE: 12/13/2019
-
NOT SAMPLED
CHECKED BY: K. CAWING DATE: 12/13/2019
LAWIN
APPROVED BYC EADY DATE:12/13/2019
PREDOMINANT BEDROCK
FRACTURE ORIENTATION
SURFACE WATER
PROJECT MANAGER: C. EADY
synTeiid LAYOUT: SECTION B B' (6 7A)
www.synterracorp.com
- NO DATA AVAILABLE
ANALYTICAL PARAMETER B SO4 TDS
REPORTING UNITS Ng/L mg/L mg/L
15A NCAC 02L STANDARD 700 250 500
BACKGROUND THRESHOLD
VALUES 50 38 710
(TRANSITION FLOW ZONE)'
BACKGROUND THRESHOLD
VALUES 50 69 560
(BEDROCK FLOW ZONE)'
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED
USING DATA FROM BACKGROUND GROUNDWATER SAMPLES
COLLECTED NOVEMBER 2010 TO DECEMBER 2018 AS SUBMITTED
JUNE 2019.
FIGURE 6-7a
GENERAL CROSS-SECTION B-B'
EAST ASH BASIN - CONSERVATIVE GROUP
MEAN OF BORON, SULFATE AND TOTAL
DISSOLVED SOLIDS
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

B BI
(NORTHWEST)
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE EAST ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE EAST ASH BASIN WASTE BOUNDARY
(SOUTHEAST)
APPROXIMATE
INDUSTRIAL LANDFILL
WASTE BOUNDARY
Z o _ o M N u 600
W r r z. W
Hw--mj
_____________ m w i✓� �i y-wcf
d'd'--ASH�d0-_-____ _________-----==_-_ a �p �•i¢�f 550
o m ¢--------------- ==-=APPROXIMATE ------ a0 J i NIA } � d'r N p� i" 4
LINER ELEVATION __ ------ �� C `i✓•i Qp
�? -_---------- _ N EAST ASH BASIN
o m m m m---_____-------------------_______ -- ---- a SEPARATOR DIKE
(� -----------=--=--= -- APPROXIMATE TOP OF DAM AT THE
---==_=_==============-= OIL ASH PORE
N N w __-_-__-__--__==--EASTERN IMPOUNDMENT IN 1993 AERIAL -- __�__---__---_ ----- -- ASH WATER - -----
-s-- - -- - _ ASH PORE WATER WATER ELEVATION��
INTAKE 0 II -- __-- wr — — — — — —
CANAL 00-
----
UNIT 90 J�REGOL
450
WATER ELEV. =409.0 COOLING I
I \ I \ f
TOWER POND_I"-/\'
WAT R ELEVATION=409' _ _ __ / ` I / / ` / \ / - /
\ I�/i-\I_\/i i \ I_\/i \/I�\_ ♦/I _ I_\/i �'�Ft�/i1 ♦ I_\/i \/I/\li ♦ I_ I_\/i \/I/\li ♦ I \
N /\' 400
/\ /
T+'T-"-r�r'� �/I/\`il\/I/\il�rl���l\rl/\il�/I \-'\/I/\i/�/I//\i/�/I/� �/I/\i/♦/�/\`i��/I/\/�/I/�i/\%1/\i/�/�/\`�/�/I/\-/�/�/�`�/�/I \-/ /�/�/�/�/�`i/�/I/\-/�/�/\`i/�/I/\-/�/I/\�I/\-/�/I
_\ _\� \
I 1� \�\'/` - \l/�-\�1'`� �i lil\♦ 1�\ \'\`/�i li/\♦ I/\ \'\`/�i lil\♦ I�\ \'//-\ 1%/�-\�1'/� -\ \%/� -\�1 \ �-
\ / / \l / / l
_\ ./ \/./- \/ -\/./- _\ ./ _ / _/i ♦ I�\li I_\l ♦/-I�\li I�\li ♦ I/\/i I�\li \ _/i \ _li \ _li ♦ I/\li ♦ I/\ /
_ _ /� I• \/• \ I� \/� 1� \ I'BEDROCK.\/�
BEDROCK-
1 / \`� / / i / \ . /: / 1 _ `- / / i / \- `i I • BEDROCK\ . / \`/ 1 /BEDROCKS, i / \ . /: / I / \`� ;: / i / \ . /: / I \`' ;\ i / \ / : / I \`' ;\ i / \ . /: / I \`�' \ ' I / \ ' \ 1 / \`� / \ ' I / \- / \ / I \`'' ♦ / I / \ \/ : //11 \` \ ;�
/-\\ _\/ /-♦?�_ \\ ,/-_\ \\ ./-_\ ./-\\ ./-_\ ./-\\ ,/-_\ ./-\\ ./-_\ /-♦\, ,__\' /- /--`' /-\:' /--`' /-\' NOTES:
_
_ /
I%\/�/\/I/4 /\/1%\/ /\/I!\/�/\�/I%\/�/♦/I!\/�/\�/1% \' r1!\l I\\/I%\l l\/I!\/:/\/I%\/ �/\�7Tk /;, ; / %`�i�\/ /;, ;`/ %;`�i�\/ /\-,\/1�;\�i�\/�/;/�;`/�%;`�i�\/�I\`, i; \I�j;���\/�1;7T,\ -\ ,1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN
\/ j\I•/\�,•/\,-j'I`/�/-`'I`/\�-j'I�/�/-`'I`/ ,-� , /\/-`',`/\�-i\I•/„_\/i./ �_„I•/\�_\' \/-`'I`/�/_ /•/\�_\/i./\,_\/i./„_\� /\,/./- _\'I./\/_\/ / '. / /„_\\' CALCULATED BASED ON CENTRAL TENDENCY OFDATASET
MW-206
� \-\'/-� ARTESIAN WELL / ,\-1'/-`��\'/ USING DATA RANGING FROM JANUARY 2018 TO JUNE 2019.
,/\ �� I/ � r,/\�� I/\ \r,/\ �� 1/\ r,/\. 1/\ ♦ I/\ \ I/ - �` ,/\ \ I/\ \r,/\ \ I/\ \r,/\ � I/\ r,/\ \ 1/\\ r,/\ : ,Ir\\ r,.\ \ I/\ rI.\ I/\ \/I/\ :;2.SELENIUM(Se)ANDSTRONTIUM(Sr)CONCETRATIONSARE
LEGEND (Ng/L)
IN MICROGRAMS PER LITER
T, 71,'\ / 1, I, \ /
NOTES
_\ WELLS WITH DATASETS CONTAINING FEWER THAN FOUR
PZ-12 PIEZOMETER VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP TO
,' ABMW- WELL IN ASH PORE WATER ASH PORE WATER 1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED JUNE 2019 WAS USED.
-i \ / - ♦ `'I� /\ -i \ ♦ `�I ` /\ -i \ / - \ `/I /\ -i / - \ ` GMW-2 WELL IN TRANSITION ZONE LEVEL ELEVATION FOR APRIL 22-23, 2019 FOR EACH WELL. ELEVATIONS WITHIN EACH
- NO DATA AVAILABLE
/ \ ,� 1 /� �; �/` /; \ �/� 1 /� ; ' / /� DEEP FLOW LAYER GROUNDWATER CLUSTER ARE MEASURED IN THE SAME DAY. REFERENCED TO NORTH
i%\/ /` �/,I %\/ `;�`/�1 %\/ ;♦� ,I / y� / ♦ / I / \lWELL IN COMPETENT BEDROCK LEVEL ELEVATION AMERICAN VERTICAL DATUM, 1988. ANALYTICAL PARAMETER Se Sr
DW-26 WATER SUPPLY WELLS CROSS SECON
BEVE�ELEVATCK FLOW
IONLAYER GROUNDWATER 2 REPRESENT GENERALI EDORIENTATIONSOF. FRACTURES CONCEPTUALLY DEPICTED ON IFRACTTURESOBSERVED REPORTING UNITS Ng/L Ng/L
r . \`� \ / i . �\ \ \`r . \`� �\ \ l BASED ON TELEVIEWER LOGGING AT THE ABMW-7BRLL BOREHOLE. THE 15A NCAC 02L STANDARD 20 NE
\ ` / - ♦ \ / . / - _ \' \ / - ♦ \' . / - _ \ \ / - \ \' . / - _ \ / - \ \' _ _ GENERALIZED WATER TABLE 6R,N,-0]8R MEAN SELENIUM (Se) CONCENTRATION (Hg/L)
\' / 1 , ,� \/�''; _` / \' / 1 , , / \/� 1 ,; `/ \' / \ '_ \ /•\/ �_' �` \ GENERALIZED GROUNDWATER MEAN STRONTIUM (Sr) CONCENTRATION (Hg/L) DEPICTED FRACTURE ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN BACKGROUND THRESTHE HOLD
THE PLANE OF THE CROSS SECTION AND VERTICAL,I%\/� �♦ /,I' \/i ��`/-1%\/� �♦ //I! \/i/�`/-I%\/� �♦ //I! \/%/, `i /,1! \/%/ —� LUES
FLOW DIRECTION ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLIUUSTRATE N. AT (TRANSITION FLOW ZONE)' 2 760
GENERALIZED SUBSURFACE ASH
WELL SCREEN
THIS SCALE. IN ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES
BACKGROUND THRESHOLD
\
PORE WATER FLOW DIRECTION
VERSUS DEPTH ARE CONCEPTUAL ONLY.
VALUES
GENERALIZED VERTICAL - - COMPLIANCE BOUNDARY
3. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION
1 a36
(BEDROCK FLOW ZONE)
HYDRAULIC GRADIENT WASTE BOUNDARY
=
AVAILABLE UP TO DECEMBER 31, 2015.
— LITHOLOGIC CONTACT
4. ALL BOUNDARIES ARE APPROXIMATE. 1
BACKGROUND THRESHOLD VALUES WERE CALCULATED
0
ASH
ASH PORE WATER/ WASTEWATER
EAST ASH BASIN B,
0
SAPROLITE
®
TRANSITION ZONE
0
BEDROCK
WESTASH
0
REGOLITH
BASIN
0
SOIL FILL
OUNNAWAY
®
STRUCTURAL FILL
RO
NOTSAMPLED
NOTE:
CROSS SECTION B-B' IS LINEAR IN NATURE AND NOT
PREDOMINANT BEDROCK
ALL LOCATIONS ALONG THE CROSS SECTION ARE
FRACTURE ORIENTATION
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
0
SURFACE WATER
GRAPHIC SCALE
D 100 250 500
44*)DUKE
ENERGY
HORIZONTAL SCALE: 1= '
VERTICAL SCALE: 1" =
AT
5X VERTICAL EXAGGERATION
PROGRESS
DRAWN BY: AY IGL DATE:08/02/2019
REVISED BY: D. KREFSKI DATE: 12/13/2019
CHECKED BY: K. LAWING DATE: 12/13/2019
APPROVED BY: C. EADY DATE: 12/13/2019
PROJECT MANAGER: C. EADY
LAvouwww
.synterracorp.com
s mTerra
USING DATA FROM BACKGROUND GROUNDWATER SAMPLES
COLLECTED NOVEMBER 2010 TO DECEMBER 2018 AS SUBMITTED
JUNE 2019.
NE - NOT ESTABLISHED
FIGURE 6-7b
GENERAL CROSS-SECTION B-B'
EAST ASH BASIN - VARIABLE GROUP
MEAN OF SELENIUM AND STRONTIUM
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

Note'
Affected
*-Sampling
0
events prior to
Transition Zone Groundwater a
1/1/2018
Legend
a
■
CCR-100D
AL
GMW-6
•
MW-22D
•
CCR-101D
■
GPMW-1D
A
MW-34D �
A
CCR-113D
•
GPMW-2D
MW-35D ■
■
GMW-IA
Ak
GPMW-3D
♦
MW-
•
GMW-2
■
MW-11D
Z
-37D
Ash Pore Water
Legend
ABMW-4
ABMW-5
ABMW-6
ABMW-7*
Bedrock Groundwater Legend
■
ABMW-4BR
Z
CCR-105BR
0
GMW-11
A
MW-11BR Z
MW-24BR
•
ABMW-6BR
*
CCR-106BR
A
GMW-7
V
MW-13BR *
MW-25BR
d A
ABMW-7BR
❑
CCR-107BR
V
GMW-8
♦
MW-166R
MW-276R
s V
ABMW-7BRL
0
CCR-108BR
♦
GMW-BR
Z
MW 17BR
MW 28BR
o
a \ ♦
ABMW-7BRLL
L�,
CCR-109BR
Z
GMW-9
7Y
MW-1BR
MW-2BR
o ■
CCR-100BR
p
CCR-1106R
■
GPMW-1BR
❑
MW-16RL
MW-34BR
10
CCR-101BR
0
CCR-111BR
0
GPMW-2BR
O
MW-20BRL AL
MW-35BR
A
CCR-102BR
Z
CCR-113BR
A
GPMW-3BR
A
MW-21BRLR
MW-36BR
CCR-103BR
■
CW-1
IN
MW-108BRL
0
MW-22BR
MW-37BR
♦
CCR-104BR
■
GMW-10
•
MW-108BRLL
0
MW-23BRR
MW-3BR
/
a \
Ca
—
Transition Zone — ci
Potential
J
Mixing
ik
■
BG-01 ❑ MW-15D
Generally
Rom •
•
BG-0113R 0 MW-1813R
Unaffected
V A
A
BG-02BR A MW-18D
/
CCR-112BR-BG p MW-19BRL e 6
80°%
ao \
''
"
�Q
80%
♦
MW-1013R O MW-26BR /
Z
MW-14BR X MW-2913R ao°�
e 60%
� �
so
60% so
*
MW-15BR 5'T MW-30BR 20%
/40% ■'me
40%
Background
°#
Co
Groundwater
20% * g
A
20%
Legend
00. %
Shallow Zone — cl —
Shallow Groundwater Legend
1 GPMW-1S
E MW-35S
0 MW-37S
(' DUKE
ENERGY
PROGRESS
DRAWN BY: R. BADUM DATE: 12/8/2019
REVISED BY: R. BADUM
CHECKED BY: K. LAWING
APPROVED BY: K. LAWING
PROJECT MANAGER: C.EADY
47
www.synterracorp.com
synTerra
9
I Affected I
Potential
Mixing
w
m
`o \
Generally
Unaffected
80% R
0" S_ 0
ZV 60°% `no
Z = 40%\
s �- 20
Bedrock Zone — cl --'
FIGURE 6-8
ASH PORE WATER AND
GROUNDWATER PIPER DIAGRAMS
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

Note:
*sampling events
prior to 1/1/2018
Background Surface
Water Legend
■ RSW-6
SW-3*
t SW-1*
SW-2*
Downgradient Surface
Water Legend
■
RSW-1
•
RSW-2
A
RSW-3
RSW-4
RSW-5
Z
RSW-9
Seep Legend
■ S-14
• S-21*
A S-13
I Affected I
Potential
Mixing
Generally
Unaffected
80 °/a
�.� 60%
/40% 4
o Z
20%
0 0
E—Ca-
0
I' DUKE
DRAWN BY: R. BADUM DATE: 12/8/2019
ENERGY
REVISED BY: R. BADUM
PROGRESS
CHECKED BY: K. LAWING
APPROVED BY: K. LAWING
�1
PROJECT MANAGER: C. EADY
synTerra
www.synterracorp.com
F
Cl
FIGURE 6-9
SEEP AND SURFACE WATER
QUALITY PIPER DIAGRAMS
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

w
f
/ i
• • /
•• _0 00000
� � I
UNIT 3 COOLING
TOWER POND
UNIT 3 HEATED
WATER DISCHARGE POND
r' EASTASH SEPARATOR DIKE
BASIN
Af1 ■
LCID LANDFILL
INDUSTRIAL ,
k �-� LANDFILL
a
RN DISCHARGE CANAL -,
t I
f
I
..i
f
I
,
- I
'--- f' DUKE
ENERGY
_f PROGRESS
(IN FEET)
DRAWN BY: C. WYATT DATE: 06/11/2019
REVISED BY: C. WYATT/K. KING DATE: 12/13/2019
CHECKED BY: K. LAWING DATE: 12/13/2019
APPROVED BY: K. LAWING DATE: 12/13/2019
PROJECT MANAGER: C. EADY
LEGEND
Izz
NOTES:
FIGURE 6-10a
ISOCONCENTRATION MAP
BORON IN TRANSITION FLOW ZONE
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

ru
m
INTAKE
CANAL
a
I
op
��N . `
IS WEST ASH
BASIN Ll
.`T,
GYPSUM -
STORAGE
AREA
ME m
` I♦
•
EASTERN DISCHARGE CANAL
A-
I
I1
1 — j
C
1 -
1 /� ' •
.�♦
DUKE
ENERGY
(IN FEET)
PROGRESS
DRAWN BY: C. WYATT
REVISED BY: C. WYATT/K. KING
CHECKED BY: K. CAWING
APPROVED BY: K. LAWING
sWTerm PROJECT MANAGER: C. EADY
www.synterr
LEGEND
FIGURE 6-10b
ISOCONCENTRATION MAP
BORON IN BEDROCK FLOW ZONE
DATE: 06/11/2019 EAST ASH BASIN
DATE: 12/18/2019 DATE: 12/18/2019 CORRECTIVE ACTION PLAN UPDATE
DATE: 12/18/2019 ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

0
7-7
UNIT 3 COOLING ,
TO
UNIT 3 HEATED
WATER DISCHARGE POND
•
EAST ASH
y_ BASIN
I
WESTASH
BASIN
i
•
1
1
1
I
s
�-- DUKE
ENERGY
ENERGY
PROGRESS
LEGEND
' I NOTES:
■
FIGURE 6-11a
ISOCONCENTRATION MAP
(IN FEET)
SULFATE IN TRANSITION FLOW ZONE
EAST ASH BASIN
DRAWN BY: C. WYATT DATE: 06/11/2019
DBY:C.ATT/K. KING DATE: 12/27/2019
CORRECTIVE ACTION PLAN UPDATE
CHECK
CHECKED BY: K.. CAWING DATE: 12/27/2019
APPROVED BY: K. LAWING DATE: 12/27/2019
ROXBORO STEAM ELECTRIC PLANT

••� LEGEND
• r �
� I
EASTERN DISCHARGE CANAL I
i
•
1
' , I1 �
� NOTES:
r ..—..
.I
-4 ♦ '� ` ,
i
•
t�ENERGY
DUKE FIGURE 6-11b
ISOCONCENTRATION MAP
(IN FEET)
41 PROGRESS SULFATE IN BEDROCK FLOW ZONE
4 DRAWN BY: C.WYATi DATE:06/11/2019 EAST ASH BASIN
REV ISEDBY: C.ATT/K. KING DATE: 12/18/2019 CORRECTIVE ACTION PLAN UPDATE
1 CHECKED BY: K.. CAWING DATE: 12/18/2019
APPROVED BY: K.LAWING DATE:12/18/2019 ROXBORO STEAM ELECTRIC PLANT
synTerra PROJECT MANAGER:
ADY
www.synterracorp.com
me rracorp.com SEMORA, NORTH CAROLINA
.�

/
mp
,ems-- 4�. � - - / � •
a •'
ll
"Pro
/ f
\ n
LEGEND
•
EASTERN DISCHARGE CANAL
♦�
s .
V
I I NOTES:
r-----
00
�4 ;
V J ♦ ,
♦ I
- �\ � 0 ram♦ / � ••
�a�rl
♦.�� ��41.
('DUKE
ENERGY
PROGRESS
(IN FEET)
DRAWN BY: C. WYATT DATE: 06/11/2019
REVISED BY: C. WYATT/K. KING DATE: 12/18/2019
CHECKED BY: K. LAWING DATE: 12/18/2019
APPROVED BY: K. LAWING DATE: 12/18/2019
PROJECT MANAGER: C. EADY
FIGURE 6-12a
ISOCONCENTRATION MAP
TDS IN TRANSITION FLOW ZONE
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

LEGEND
f f •
0000
f
GYPSUM %
f- `
EASTERN DISCHARGE CANAL
•,El
'
i
f
I � i
v . I
♦�
NOTES:
DUKE
FIGURE 6-12b
ENERGY
ISOCONCENTRATION MAP
(IN FEET)
TDS IN BEDROCK FLOW ZONE
PROGRESS
DRAWN BY: C. WYATT DATE: 06/11/2019
EAST ASH BASIN
REVISED KING DATE: 12/18/2019
CORRECTIVE ACTION PLAN UPDATE
CHECKED BY: K.. CAWING DATE: 12/18/2019
APPROVED BY: K. LAWING DATE: 12/18/2019
ROXBORO STEAM ELECTRIC PLANT
synTerra
PROJECT MANAGER: C. EADY
SEMORA, NORTH CAROLINA
www.synterracorp.com

' •• �� LEGEND
f
f
000,
IEASTERN DISCHARGE CANAL
(' DUKE
V ENERGY
PROGRESS
(IN FEET)
DRAWN BY: C. WYATT DATE: 06/11/2019
REVISED BY: C. WYATT/K. KING DATE: 12/18/2019
CHECKED BY: K. LAWING DATE: 12/18/2019
APPROVED BY: K. LAWING DATE: 12/18/2019
PROJECT MANAGER: C. EADY
NOTES:
FIGURE 6-13a
ISOCONCENTRATION MAP
SELENIUM IN TRANSITION FLOW ZONE
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

••� LEGEND
00
♦ I
L \�
♦ I
" I
WESTASH
BASIN
-
00
jj, ,' , , • •
. p
-41
-
o �-- (' DUKE
' ENERGY
" (IN FEET)
PROGRESS
DRAWN BY: C. WYATT DATE: 06/11/2019
REVISED BY: C. WYATT/K. KING DATE: 12/18/2019
CHECKED BY: K. LAWING DATE: 12/18/2019
' APPROVED BY: K. LAWING DATE: 12/18/2019
•, synTerid PROJECT MANAGER: C. EADY
www.synterracorp.com
110
NOTES:
FIGURE 6-13b
ISOCONCENTRATION MAP
SELENIUM IN BEDROCK FLOW ZONE
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

I e
♦
%
4. EASTERN DISCHARGE CANAL] Ll
J ♦ f
,
► ' ♦ \
.o♦,
_ra
� , I
f
� s I
• f
v `♦ I
1 I
. .
I
10
t
DUKE
ENERGY
PROGRESS
(IN FEET)
DRAWN BY: C. WYATT DATE: 06/11/2019
REVISED BY: C. WYATT/K. KING DATE: 12/16/2019
CHECKED BY: K. LAWING DATE: 12/16/2019
APPROVED BY: K. LAWING DATE: 12/16/2019
PROJECT MANAGER: C. EADY
LEGEND
•
NOTES:
FIGURE 6-14a
ISOCONCENTRATION MAP
STRONTIUM IN TRANSITION FLOW ZONE
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

' / l
000*1
�•r• �nnevu�uvv _
AREA 1 /
INTAKE
CANAL
UNIT 3 COOLING
TOWER POND �. • ��
UNIT 3 HEATED �•
WATER DISCHARGE POND
-� EASTASH
BASIN
:ID LANDFILL
a
WEST ASH
BASIN0-..,
♦ J
♦ 1 \
♦ 1
♦ � EASTERN DISCHARGE CANAL
LEGEND
•
NOTES:
•
rs_
DUKE
FIGURE 6-14b
ENERGY
ISOCONCENTRATION MAP
(IN FEET)
STRONTIUM IN BEDROCK FLOW ZONE
PROGRESS
DRAWN BY: C. WYATT DATE:06/11/2019
EAST ASH BASIN
�jp
REVISED BY: C. WYATT/K. KING DATE: 12/18/2019
CORRECTIVE ACTION PLAN UPDATE
CHECKED BY: K. LAWING DATE: 12/18/2019
C
APPROVED BY: K.LAWING DATE: 12/18/2019
ROXBORO STEAM ELECTRIC PLANT
synTerra
PROJECT MANAGER: C. EADY
SEMORA, NORTH CAROLINA
f7
www.svnterracorD.COM

�� .. ♦ Sample ID (Depth)
�
-�..�..�..�"-♦♦ MW-03BR(0-2)
SULFATE
MW-03BR (21-23)
r
Sample ID (Depth)
MW-34D (2-4)♦� -
CHROMIUM
MW-34D (8-9)
UNIT 3 ••
TOWERPON IRON
Sample ID(Depth)
FA
PSB-49 (1.5-2)
,•
UNIT 3
HEATED WATER
♦�` J
I
I
I
t �
1 '
1
Sample ID(Depth)
MW-11 BR (1.5-2)
EASTASH
BASIN
■
I
Sample ID(Depth)
MW-02BR (2-2.5)
CHROMIUM
s fJ
#Y"`f SamplelD(Depth)
PSB-05 (1.5-2) i
0
Sample ID(Depth)
PSB-48 (1.5-2)
Sample ID(Depth)
BGSB-14 (2-3)
BGSB-14 (4-5)
BGSB-14 (7-8)
BGSB-14 (9-10)
Sample ID (Depth)
MW-01 BRL (0-2)
M W -01 B RL (4-5)
' Sample ID(Depth)
PSB-47 (1.5-2)
IRON
� a
i IF, -
Sample ID(Depth)
PSB-46 (1.5-2)
Sample ID(Depth)
PSB-39 (1.5-2)
Sample ID(Depth)
PSB-40 (1.5-2)
INDUSTRIAL
LANDFILL
Sample ID (Depth)
Sample ID (Depth) GMW-OSR (6-7)
pth)
PSB-04 (1.5-2) Sample ID (De
PSB-01 (1.5-2) CHROMIUM
Sample ID
MOLYBDENUM
(Depth)
PSB-03 (1.5-2)
Sample ID (Depth) GMW-08R (10.5-11.5)
�
PSB-02 (1.5-2)
Sample ID (Depth)
MW-16 (0-2)
Sample ID (Depth)
MW-13BR (0-2)
MW-13BR (22-24)
Sample ID(Depth)
MW-14BR (1-1.25)
MW-14BR (31-31.5)
MW-14BR (37.5-38)
CHROMIUM
4
A
I
1
■
1
1
■
I
y,
Sample ID(Depth)
PSB-45 (1.5-2)
IRON
MANGANESE
Sample ID(Depth)
PSB-44 (1.5-2)
MANGANESE
Sample ID(Depth)
PSB-43 (1.5-2)
Sample ID(Depth)
PSB-42 (1.5-2)
♦ Sample ID(Depth)
PSB-41 (1.5-2)
Sample ID(Depth)
PSB-38 (1.5-2)
IRON
Sample ID(Depth)
PSB-37 (1.5-2)
IRON
%'DUKE
ENERGY
PROGRESS
14'
synTerra
Sample ID(Depth)
MW-17 (29-31)
r•♦
l .
■
I
r'♦
'
I
■
I
Sample ID (Depth)
BGSB-112 (2-3)
BGSB-112 (4-5)
IBGSB-112
(7-8)
BGSB-112 (9-10)
BGSB-112 (14-15)
BGSB-112 (19-20)
1 FrFAIn
O BACKGROUND LOCATION WITH NO EXCEEDANCES
O LOCATION WITH NO EXCEEDANCES
BACKGROUND LOCATION WITH ONE OR MORE
EXCEEDANCES
LOCATION WITH ONE OR MORE EXCEEDANCES
ASH BASIN WASTE BOUNDARY
- - - - ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
0 STREAMS (AMEC NRTR)
® WETLANDS (AMEC NRTR)
NOTES:
1. DISCRETE SOIL SAMPLES EXCEED COMPARATIVE CRITERIA FOR CONSTITUENTS LISTED
UNDER THE SAMPLE ID. REFER TO TABLE 6.3 FOR ASUMMARY OF UNSATURATED SOIL
ANALYTICAL RESULTS.
2. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S
INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT
PERSON COUNTY GIS.
3. ALL BOUNDARIES ARE APPROXIMATE
4. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE
DEEMED APPROXIMATE.
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO
STEAM ELECTRIC PLANT DATED JUNE 2015.
6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
GRAPHIC SCALE
FIGURE 6-15
330 0 330 660
UNSATURATED SOIL SAMPLE
(IN FEET)
LOCATIONS AND EXCEEDANCES
EAST ASH BASIN
DRAWN BY: C. WYATT DATE:05/03/2019
REVISED BY: C. WYATT/K. KING DATE:12/18/2019
CORRECTIVE ACTION PLAN UPDATE
CHECKED BY: K. LAWING DATE: 12/18/2019
APPROVED BY: K. LAWING DATE:12/18/2019
ROXBORO STEAM ELECTRIC PLANT
PROJECT MANAGER: C. EADY
SEMORA, NORTH CAROLINA
www.synterracorp.com

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure 6-16
Pourbaix Diagram for Iron -Water System
Included in Section 6 text

Corrective Action Plan Update December 2019
Roxboro Steam Electric Plant SynTerra
Figure 6-17a
Remedial Alternative 3 - Well System
Layout - Groundwater Remediation by
Extraction combined with Clean Water
Infiltration and Treatment
Provided in separate electronic figure file as a
large sheet size

BASED ON INFORMATION FROM DUKE ENERGY PROGRESS 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/ R ALIZERWELL HEAD PESSURE
a MONITORING TRANSDUCER
d�F GROUNDWATER
I a
WELL PIPE GUIDES
I °
LEVEL
a
a
CONTROL SENSOR CABLE
/ ® CEMENT WITH 5 % BENTON
F1Z" tSVKtKVLt
11;
WELL CASING
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/
FIGURE 6-17b
DUKE
4*5
NOT TO SCALE
REMEDIAL ALTERNATIVE 3
CONCEPTUAL VERTICAL CLEAN WATER
ENERGY
INFILTRATION WELL SCHEMATIC
PROGRESS
DRAWN BY:J.CHASTAIN DATE:12/26/2019
GROUNDWATER REMEDIATION BY EXTRACTION
REVISEDVISEDBYDATE: -
CHECKED BY: J. CLEMMER DATE:12/26/2019
COMBINED WITH CLEAN WATER INFILTRATION
APPROV41PPROJECEDBY:J.G DATE:12/26/2019
AND TREATMENT
R:C.EAR
PROJECT MANAGER: C. EADY
CORRECTIVE ACTION PLAN UPDATE
www.synterracorp.com
synTerm
" "
ROXBORO STEAM ELECTRIC PLANT
�
SEMORA, NORTH CAROLINA

BASED ON INFORMATION FROM DUKE ENERGY PROGRESS 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
HIJUKL b-1 !C
DUKE
4*5
NOT TO SCALE
REMEDIAL ALTERNATIVE 3
CONCEPTUAL VERTICAL EXTRACTION WELL
ENERGY
SCHEMATIC
PROGRESS
DRAWN BY: J. CHASTAIN DATE:12/26/2019
GROUNDWATER REMEDIATION BY EXTRACTION
REVISED BY: DATE: -
CHECKED BY: J. CLEMMER DATE:12/26/2019
COMBINED WITH CLEAN WATER INFILTRATION
APPROVPROJECEDBY:J.G DATE:12/26/2019
AND TREATMENT
R:C.EAR
PROJECT MANAGER: C. EADY
CORRECTIVE ACTION PLAN UPDATE
synTerm
www.synterracorp.com
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

36" MIN
AGGREGATE OR TOPSOIL TO
/MATCH EXISTING SURFACE
FABRIC
6" MAGNETIC LOCATION TAPE
12" DEEP
_CLASS II BACKFILL
(EXISTING FILL MAYBE USED IF ACCEPTABLE)
INTAIN VERTICAL
SLOPED FACE
MINIMUM 4" SEPARATION BETWEEN PIPES
CLASS I BEDDING
6" MIN ELECTRICAL CONDUIT
ELECTRICAL CONDUIT
O O"or,
HDPE CLEAN WATER OR
GROUNDWATER CONVEYANCE
6" +MIN
1
4" MIN
24" MIN
4" MIN
NOTES:
1. 4" MINIMAL HORIZONTAL SEPARATION BETWEEN ALL PIPE
AND CONDUIT.
2. 6" VERTICAL SEPARATION WHEN CROSSING OVER ALL PIPE
AND CONDUIT.
3. 36" MINIMUM COVER FOR ALL PIPE AND CONDUIT.
4. PLACE BACKFILL AND FILL SOIL MATERIALS IN LAYERS NOT
MORE THAN 8" IN LOOSE DEPTH FOR MATERIAL COMPACTED
BY HEAVY COMPACTION EQUIPMENT AND NOT MORE THAN 4
INCHES LOOSE DEPTH FOR MATERIAL COMPACTED BY HAND
OPERATED TAMPERS.
5. PLACE BACKFILL AND FILL MATERIALS EVENLY ON ALL
SIDES OF STRUCTURES TO REQUIRED ELEVATIONS AND
UNIFORMLY ALONG THE FULL LENGTH OF EACH STRUCTURE.
6. COMPACT SOIL MATERIALS TO NOT LESS THAN 95
PERCENT OF MAXIMUM DRY UNIT WEIGHT ACCORDING TO
ASTM D 698.
4*DUKE
ENERGY
NOT TO SCALE
PROGRESS
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. EADY
synTero
www.synterracorp.com
NOT FOR CONSTRUCTION
FIGURE 6-17d
REMEDIAL ALTERNATIVE 3
CONCEPTUAL TRENCH DETAIL
GROUNDWATER REMEDIATION BY EXTRACTION
COMBINED WITH CLEAN WATER INFILTRATION
AND TREATMENT
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

MODEL TIMEFRAME:
MODEL TIMEFRAME:
MODEL TIMEFRAME:
SYSTEM STARTUP AND OPERATION
000-0*
f •
APPROXIMATELY 5 YEARS AFTER .
SYSTEM STARTUP AND OPERATION •
j
APPROXIMATELY 9 YEARS AFTER �.
SYSTEM STARTUP AND OPERATION /
I
10
'o
G: •
.�
000
s* 4. "s F'.
'_ `4
�.
`.
%,%
cl
In
-
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.' ®�-%—ft
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,
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%
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4.
7
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r
I
LEGEND ,A'
,A'
•,A a
NOTES:
DUKE
GRAPHICSCALE
soo o soo 1,000
FIGURE 6-17e
REMEDIAL ALTERNATIVE 3
ENERGY
w FEET:
GROUNDWATER REMEDIATION BY EXTRACTION COMBINED WITH
PROGRESS
CLEAN WATER INFILTRATION
DRAWN BY: C. WYATT DATE:05/15/2019
REVISED BY: C. DAVIS DATE:12/26/2019
SIMULATED BORON CONCENTRATIONS IN
ALL NON -ASH FLOW ZONES
— - —
CHECKED BY: K. LAWING DATE:12/26/2019
APPROVED BY: K. LAWING DATE: 12/26/2019
CORRECTIVE ACTION PLAN UPDATE
PROJECT MANAGER: C. EADY
ROXBORO STEAM ELECTRIC PLANT
synTerra
SEMORA, NORTH CAROLINA
www.s nterracor .com

GROUNDWATER
WELL
GROUNDWATER
Not to Scale
�I
r
EQ TANK
m EQ TANK
�a
FILTRATION
I 0,11
I
I FILTRATION
m m
m m
ION
EXCHANGE
ox ox
ION c � QCD<iN
m m EXCHANGE�V J
I
I I
I I
-- V ————————L—————
I---
I
I
I
I
RECHARGE SUPPLY
TANK m
DRAIN AND
SOLIDS
REMOVAL
PRESSURE GAUGE AND SHUTOFF VALVE AT EACH WELL HE
RECHARGE WELLS
NOTE: PUMP AS NEEDED
LEGEND
®
Rotameter
r� DUKE
DRAWN BY: L. LOTRAKUL DATE:10/18/2019
FIGURE 6-18a
HH - High high
H - High low
L — Low
TYP - Typical
ECXI Flow totalizer
O
I Pressure gauge
sP Sampling port
Check valve
>V< Three-way valve
Ball valve, normally
closed
CCQ
><
1
H
Ball valve, normally open
Diaphragm valve, normally open
Diaphragm valve, normally closed
EN ERGY
OGRESS
REVISED BY: B. GREEN
CHECKED BY: T. VOLSKAY
APPROVED BY: C. EADY
PROJECT MANAGER: C. EADY
CONCEPTUAL PROCESS FLOW DIAGRAM
CLEAN WATER INFILTRATION SYSTEM
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
1,
SynTerra
I
www.synterracorp.com

EXTRACTION
WELLS
I
is
EXISTING LINED
RETENTION BASIN
Not to Scale
LEGEND
®
Rotameter
DUKE
4n
DRAWN BY: B. GREEN DATE: 10/17/2019
FIGURE 6-18b
HH - High high
H - High low
L — Low
TYP -Typical
ECD Flow totalizer
OCD
I Pressure gauge
sP Sampling port
Check valve
Three-way valve
Ball valve, normally
closed
CCQ
><
►/
Ball valve, normally open
Diaphragm valve, normally open
Diaphragm valve, normally closed
E N ERGY
PROGRESS
REVISED BY: T. VOLSKY
CHECKED BY: C. EADY
APPROVED BY: K. LAWING
PROJECT MANAGER: C. EADY
CONCEPTUAL PROCESS FLOW DIAGRAM
GROUNDWATER EXTRACTON SYSTEM
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA
tip
SynTerm
I
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
ENERGY
DRAWN BY: R.ISHAM DATE:12/5/2019
REVISED CHECKED BY: S.WOOD
PROGRESS
APPROVED BY: K. LAWING
PROJECT MANAGER: C. EADY
14'
synTerra www.synterracorp.com
FIGURE 6-19
CAP IMPLEMENTATION GANTT CHART
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTIC PLANT
SEMORA, NORTH CAROLINA

je
WESTASH
BASIN
Z73
000 .•/
�.• s � ••00000
...0000
,
/ ' • � MW-286R
WNW. �' $
GPMW-3D/BR *' ,
4' i to MW-3BR
GPMW-2D/BR ,+
`
% � MW-296R
♦ `
PE
PMW-1S/D/BR ®� 1 %♦
♦ Q�MW-27BR
MW-36D/BR
MW-=4D/BR � � MW-22D/BR ♦
MW-37S/D/BR .
MW-35S/D/BR MW-1 BR/BRL
CCR-103B; `• GM�W-10 CCR-105BR-106B CW-1
GMW 2
--%% ®GM� GMW-11 CCR-107BR
CCR-104BR
r�
OR
EASTASH
BASIN
i
EASTERN DISCHARGE CANA
)IIIBJBRLL
1
1
I
ELECTRICAL
I�I ly,♦ •' �' I
I �
+ 41 • •
EXXTRUlwo
4 V
I
♦ 1
'A
♦, +�
+
' DUKE
`*
GRAPHIC,♦'•
325 GSCALE
650
ENERGY
(IN FEET)
r
♦, ♦�,�-a
PROGRESS
DRAWN BY: C. WYATT DATE: 10/30/2019
_•'.�
♦ '
REVISED BY: J. KIRTZ DATE: 12/23/2019
•
MW-19BRL
CHECKED BY: K. LAWING DATE: 12/23/2019
APPROVED BY: K. LAWING DATE: 12/23/2019
,
PROJECT MANAGER: C. EADY
s)mTerra
+
www.synteracori).com
LEGEND
lie PROPOSED PERFORMANCE MONITORING WELL
+�- EFFECTIVENESS MONITORING FLOW PATH
—ASH BASIN WASTE BOUNDARY
-ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
• SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
--*- STREAMS (AMEC NRTR)
® WETLANDS (AMEC NRTR)
NOTES:
1. WELLS INDICATED WITH RED FONT WILL HAVE GEOCHEMICAL SONDES FORTELEMETRY
MONITORING.
2. CCR-112BR-BO, MW-14BR, MW-19BRL, MW-2913RAND MW30BR ARE APPROVED
BACKGROUND GROUNDWATER MONITORING LOCATIONS.
3. ALL BOUNDARIES ARE APPROXIMATE.
4. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES ANDAREA MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE
DEEMED APPROXIMATE.
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE USARMY CORPS
OF ENGINEERSAT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDSAND STREAMS
BOUNDARIES WERE OBTAINED FROMAMEC FOSTER WHEELER ENVIRONMENTAL &
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO
STEAM ELECTRIC PLANT DATED JUNE 2015.
6.AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 6-20
EFFECTIVENESS MONITORING PLAN
SYSTEMS AND FLOW PATHS
EAST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

Interim
Monitoring Plan Corrective Action
(IMP) sampling Plan Approval
Effectiveness Monitoring Plan (EMP)
monitor downgradient, sidegradient,
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?
-0re
Adjust remedial system
components; continue with EMP
or
Implement contingency plan in
accordance with CAP Update
Section 6.8.9; continue with EMP
Notes:
NCAC - North Carolina Administrative Code
02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and
Standards
No
Continue EMP sampling and Continue PCMP sampling
Annual Review and and Annual Review and
Reporting I I Reporting
/ \
Is the ash basin Yes
certified closed?
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
compliance boundary boundary?
for three years?
No
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
DUKE
ENERGY.
PROGRE55
DRAWN BY: T. PLATING
REVISED BY: J. WYLIE/K SHECK
CHECKED BY: K. LAWING
DATE: 10/112019
DATE: 12/16/2019
DATE: 12/16/2019
APPROVED BY: C. EADY
MANAGER: C. EADY
DATE: 12/16/2019
tPROJECT
ip
www.synterracorp.com
synTem
FIGURE 6-21a
EFFECTIVENESS MONITORING PLAN
WORK FLOW AND
OPTIMIZATION FLOW DIAGRAM
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, 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
not result in significant
reduction of constituents
• Constituents have not and
will not migrate onto
adjacent properties
• GW discharge to surface
water will not violate 02B
standards
Public notice of the request
per Rule 0.0114 (b)
Proposed termination is
consistent with all other
environmental laws
Has the site
been identifie
for resource
development?
Implement GW
nation
monitoring planJat
orized
Fafter
location of no le
health
than one year'
predicted time
safety
analysistravel
upgradienany
existing oforeseeable
rece
Is thereFr ,
sufficient
evidence
that concentrations are
less than 02L standards
from multiple
sampling,
events?
No
further
action

C—
(NORTH)
J
Q
a
Z
Q
U
w
C9
d'
Q
2
U
ABANDONED SLUICE
D
PIPE TRENCH
w
ZF
o
a
PLANT
o a
o¢ �f \
W W ELECTRIC
�? a
'
?� SUBSTATION
:E a
OQ
w
''\
kr� r e
o //
2 REGOLITH 1
I /
/—
400 452.
411. -
- 95'
�.
♦ / / / . /
300
r,. B_ EDROCK\/'/`' 1' \/:/\
i\'/I;C�i\'/I;C�i`I•/„�i\'/I;C�i\'/I;��i\'/I;C�i`'/1;��^'
\r1/\
I I I I l LEGEND
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE WEST ASH BASIN COMPLIANCE
BOUNDARY
APPROXIMATE WEST ASH BASIN WASTE
BOUNDARY
0
K 0
J W
00 > ENGINEERED a
BASE LINER 0
J
Q
J
J
Z
Q
m m
an
o
o
W
WEST FGD SETTLING POND
BIO-REACTOR
BUILDING
000
N N
N
a
N
w
a
N
w
(9
Z W
W Q
C'
(SOUTH)
J
O
O
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U
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jZ
Lu
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OW ov
m m
m N
�W
ui
C9 C7
-
0�
m m
m m
��
tir ,'"�P o
REGOLITH
SH Q Q U (�
SOIL FILL I1 `, , _
ASH =
77
ASH PORE -_ �
- -- /
WATER
VM10:1
/ /
I . \ I . \ I
/
BEDROCK,\/I'\/1r''\
�i\';
\`457.35'
�- / /
- J3
�:♦/ \/
CCR-208S WELL IN SHALLOW MATERIAL SHALLOW ZONE FLOW LAYER
MW 6D WELL IN TRANSITION ZONE GROUNDWATER LEVEL ELEVATION
MW-6BR WELL IN COMPETENT BEDROCK V TRANSITION ZONE FLOW LAYER
GROUNDWATER LEVEL ELEVATION :I'd'k'fvkm I
ABMW-3
WELL IN ASH PORE WATER
R010
WATER SUPPLY WELL
D W-46
_ —GENERALIZED WATER TABLE
GENERALIZED
000001-
GROUNDWATER FLOW
DIRECTION
GENERALIZED SUBSURFACE ASH
PORE WATER FLOW DIRECTION
GENERALIZED VERTICAL
HYDRAULIC GRADIENT
— — LITHOLOGIC CONTACT
0 ASH
ASH PORE WATER / WASTEWATER
BEDROCK
0 REGOLITH
SOIL FILL
NOTE:
PREDOMINANT BEDROCK
CROSS SECTION C-C' IS LINEAR IN NATURE AND NOT —
ALL LOCATIONS ALONG THE CROSS SECTION ARE FRACTURE ORIENTATION
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
V BEDROCK FLOW LAYER GROUNDWATER
LEVEL ELEVATION
ASH PORE WATER
LEVEL ELEVATION
WATER LEVEL ELEVATION (NAVD 88)
(LABEL COLORING BY FLOW ZONE)
WELL SCREEN
— — — COMPLIANCE BOUNDARY
WASTE BOUNDARY
��
, _
i'7 -
\/. \ I 1 / \ I , \/�
;\, BEDROCK'/'�
\lam;\/I�\/i/,/,,
XA
NOTES
1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR APRIL 22-23, 2019 FOR EACH
WELL. ELEVATIONS WITHIN EACH CLUSTER ARE MEASURED IN THE SAME DAY. REFERENCED TO NORTH
AMERICAN VERTICAL DATUM, 1988.
2. FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT GENERALIZED ORIENTATIONS OF
FRACTURES OBSERVED BASED ON TELEVIEWER LOGGING AT THE MW-208 BOREHOLE. THE DEPICTED FRACTURE
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE CROSS SECTION AND VERTICAL
EXAGGERATION. THE ACTUAL NUMBER OF FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN
ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH ARE CONCEPTUAL ONLY.
3. DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION AVAILABLE UP TO DECEMBER 31, 2015.
4. ALL BOUNDARIES ARE APPROXIMATE.
5. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
GRAPHIC SCALE
0 100 250 500
`� DUKE
ENERGY
HORIZONTAL SCALE: 1" = '
VERTICAL SCALE: 1" = 100
5X VERTICAL EXAGGERATION
PROGRESS
DRAWN BY:A.FEIGL DATE:08/02/2019
REVISED BY: D. KREFSKI DATE: 12/13/2019
CHECKED BY: K. LAWING DATE: 12/13/2019
APPROVED BY: C. EADY DATE: 12/13/2019
PROJECT MANAGER: C. EADY
LAYOUT: SECTION C-C' (6-22)
www.synterracorp.com
synTeiid
FIGURE 6-22
GENERAL CROSS-SECTION C-C'
WEST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

D D'
(NORTH)
DUKE ENERGY PROGRESS PROPERTY LINE
(SOUTH)
APPROXIMATE WEST ASH BASIN COMPLIANCE BOUNDARY
soo APPROXIMATE WEST ASH BASIN WASTE BOUNDARY soo
550 "0
WEST ASH BASIN o o pip —
MAIN DAM o r N m
j OUTLET STRUCTURE
500 w ASH BASIN FILTER DIKE 500
0 Q co co Q PRE -DECANTING WATER WAB EXTENSION IMPOUNDMENT
_
----- -- ASH =________ - _ ______ -- ELEVATION-462 —
r - - - - - - - - _ — — — — — — — —� `�`"` — — - -- -- - — — — — WATER ELEVATION=446' ASH —
450---------� ��..---------------------- ����
----------- -------------------------------------------
HEATED WATER----------_-_-_-_-_-_-_-_-------------------------------------------------- _-_-_-------------------- — — — — _ _ -- Z _ _ _ _ _ _ _ _ --
DISCHARGE POND-450
-------- — _= ASH PORE -------------------- ---------------------- —ASH PORE ------------------------------_ -
___ _____ WATER
WATER ELEVATI N= ---- ----------------------------_------------------_----------
0 412' - - - - - - - - - - - WATER ----------------- - — ------------------------ - - - - - ----------------- -�� ------ .. �e-rT.
—L -- ------ - - - - - - - ------ - - - - - - - - - - - - - - - -++�-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_----------------- - - - - - -- - ��• . / . . /
400 ---- ---- ----------__ --y -- 'r'�-CTZ'/1'_ _ ----------------------- - _ _ _ / r
/-------------------------------� �y ��Ti�i\liil\`�`\\l��.-.-�\';.\.-�\';.400
_ . r ` \ r \ / 1 ` r EGOLITH/PWR I . / . , I \ /
463.39' ,,mil \ �/� i \/\'/1"\/\'/I"\/\'/1 '\/\'/1;�\/\'/1" \/\'/1"\/\ /1 / \/\ /1 \/\ /1 /\ \/\. ,�\• /1 \/\ /I, ,\/\ /1 \/\ /1,\/\'/1" \/\'/1
461.48' ' '- ' '- ' '- ' ;- ' '- / ' -1'i-\\ � \\ EGOLITH/PWR-\-\'/- \ \'/- \-\'/- \ \'/- \-\'/- \ \'/- \-\'/- \ \'/- \-\'/- \ \'/-
/ r / /.� I \ i� I,\•�/ / \: �/ 462. � \/I \`'I/\/I ''. I,\\rl/\/I \`''; rl/\� .�i\`';.
I
350\'rl"/\'/I"\/\'/1"/\'/1"\/'/1"'/I"/\'/1"\/\'/I"/\'\'/1 350
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250
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/ / / _ BEDROCK / / /
l'`i-: I :
200/I,,\/\'/1"\/\'/I;��/\'/I"\/\'/1;��/\'/I"\/\'/1;,�i\'/1"\i\'/1;'�i\'/1"\i\'/I,'�i\'/1"\i\'/I;'�i\'/1"\i\'/1;'�i\'/I"\i\'/1;�\i\'/I"\i\'/1`r i\\i./`� \I./.r_-\I\\i./`/_
\/I/\ i I_\ \/I/\ i \/I/\ I/\ i ♦ i \/1/\ I/\ i \/I/\
/1`\/\I./;,/\'/1`�\/\I./;,/\'/1`\/\I./`��/\'/1`\/\I./`��/\'/1`\/\I./`��/\'/1`\/\I./`��/\'/1`\/\I`/,/\'/1`\/\I./;,/\'/1`\/\I./�/\'/1`\/\I./�/\'/1`\/\I./`��/\'/1`�\/\I./"�/\'/1`�\
_, \ /1, _ _ , \ /1, _ \ /1, _ _ , \ /1, _ _, \ /1, _ _, \ / 1, _ _, \ /1_, \ /1, _ \ /1, _ _ , \ /1, _ \ / 1, _ _, \ /1, �-
:.//l�ltel�\/l`\l'\`/ -1i \/�\ l NN"I 1 ' \/"\ / /`-/-\ l /\ `�-I
150 N `
NOTE:
—
HYCO LEGEND
RESERVOIR CROSS SECTION D-D' IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
n ABMW-1 WELL IN ASH PORE WATER ASH PORE WATER NOTES
POWER PLANT ABMW-1BR WELL IN COMPETENT BEDROCK LEVEL ELEVATION
BEDROCK FLOW LAYER GROUNDWATER 1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR APRIL 22-23, 2019
_ Z _ GENERALIZED WATER TABLE LEVEL ELEVATION FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE MEASURED IN THE SAME DAY.
GENERALIZED GROUNDWATER WATER LEVEL ELEVATION (NAND 88) REFERENCED TO NORTH AMERICAN VERTICAL DATUM, 1988.
FLOW DIRECTION (LABEL COLORING BY FLOW ZONE) 2. FRACTURE OCCURRENCE AND ORIENTATION NOT DEPICTED.
GENERALIZED SUBSURFACE ASH NO GEOPHYSICAL LOGGING CONDUCTED IN DEEP BEDROCK BOREHOLES SHOWN ON
PORE WATER FLOW DIRECTION WELL SCREEN CROSS-SECTION.
EAST ASH BASIN GENERALIZED VERTICAL — — — 3. ALL BOUNDARIES ARE APPROXIMATE.
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
HYDRAULIC GRADIENT
COMPLIANCE BOUNDARY
- LITHOLOGIC CONTACT WASTE BOUNDARY
t' WEST ASH 0 ASH
BASIN
\ 0 ASH PORE WATER / WASTEWATER
Du BEDROCK
RD
0 BEDROCK
REGOLITH
SOIL FILL GRAPHIC SCALE
a' o �00 2so 50oDDUKE
FIGURE 6-23
HORIZONTAL SCALE: 1" = 500'
ENERGY VERTICAL SCALE: 1" = 100' GENERAL CROSS-SECTION D-D'
5X VERTICAL EXAGGERATION WEST ASH BASIN
DRAWN BY: A.FEIGL DATE:
SF,�ORq RD PROGRESS REVISED BY: D. KREFSKI DATE:012/014/2019 CORRECTIVE ACTION PLAN UPDATE
/yam APPROVED BY: C. EADYG DATE: 12/14/2019
ROXBORO STEAM ELECTRIC S MORA, ORTH CA OLINA PLANT
PROJECT MANAGER: C. EADY
LAYOUT: www
CROSS SECTION LOCATION synTeria.synterracorp.com

1
PRE -DECANTING CONDITIONS
r
,/ ��� POST CLOSURE CONDITIONS
FOR CLOSURE -IN -PLACE
� III \�-�'%
\`
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SATURATED ASH
��/ '•
`.` THICKNESS (FEET)
SATURATED ASH
` �., THICKNESS (FEET)
J
LEGEND /
UKE
DUKE
�'
GRAPHIC SCALE
375 0 375 750
FIGURE 6-24
E
SATURATED ASH THICKNESS MAP
PROGRESS
(IN FEET)
PRE -DECANTING AND CLOSURE -IN -PLACE CONDITIONS
WEST ASH BASIN
DRAWN BY:C.WYA17 DATE:10/30/2019
10011
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}
®
REVISED BY. C. WYATT/K. KING DATE: 12/12/2019
CHECKED BY: K. LAWING DATE: 12/12/2019
APPROVED BY: K. LAWING DATE: 12/12/2019
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
synTerra
PROJECT MANAGER: C.EADY
SEMORA, NORTH CAROLINA
www.synterracorp.com

C — — IIIIIIIIII—C
(NORTH)
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HYCO \� ; i . /I - v / \; /I
RESERVOIR / ♦, ♦ ` _ ♦ 'I ,
LEGEND
NOTE:
CROSS SECTION C-C' IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
CROSS SECTION LOCATION
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE WEST ASH BASIN COMPLIANCE
BOUNDARY
APPROXIMATE WEST ASH BASIN WASTE
BOUNDARY
0
� mm mm
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SOIL FILL LLN ♦,�,_ _♦../'i\\�:. I _♦�./ :',''`_♦:./I�\ �:'/1' �:
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-- / / ` \mil `/'. ♦ ♦: .-1 / -1//\ \ ♦� / /-,l/♦ \♦�/ / /-,l/� \ \�/ / /-`l/♦ \.�/ /
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I / \ i / / I . \`i �\ / I / \ i l I \`� �\ / I / \ i �\ 1 \♦' �\ / 1 / \ �� / I \`- / ` / I / \ / 1. CONCENTRATIONS SHOWN ARE STATI STICAL MEAN �\�/,�\ / / 1 . \`i �\ / I / \ / /
/\/♦'/1�'�/♦'/1"\/♦'/1��\/♦'/1 ' ♦'/1�'�/\'/1"\/\'/1�'� \'/1" ,♦ 1�/\ CALCV LA
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US]NG DATA RANGING FROM )AN VARY 2018 TO JUNE 2019. _ _ __/
\ l i t �`/ 1 \/ i t \`/ l i \lit ♦/ I \/ i t \`/ I/ /\♦/ I \/ i t \`/ I i \l i l\♦/ I \ \`/ l i\ l i l ♦/ \/ l ! ��`/ I/ \/ 1 l \`/ l IN\l
`/`�Z-BORON[B]CONCENTRA7ION5 ARE [N MICROGRAMS PER /'LITER [N41L)`,I • WELLS WITH DATASETS CONTAINING FEWER THAN FOUR NOTES
` ♦'I /♦ ♦ VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP TO . ,I \ ♦'
'JUNE 2019 WAS USED. / 1 ` ' ♦I
CCR-208S
WELL IN SHALLOW MATERIAL
SHALLOW ZONE FLOW LAYER
DATA
1.
WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR
MW-6D
WELL IN TRANSITION ZONE
GROUNDWATER LEVEL ELEVATION
NO AVAILABLE
APRIL 22-23, 2019 FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE
ANALYTICAL PARAMETER B
MEASURED IN THE SAME DAY. REFERENCED TO NORTH AMERICAN VERTICAL
/ 1
' ♦�
MW-6BR
WELL IN COMPETENT BEDROCK
TRANSITION ZONE FLOW LAYER
REPORTING UNITS Ng/L
DATUM, 1988.
ABMW-3
WELL IN ASH PORE WATER
GROUNDWATER LEVEL ELEVATION
15A NCAC 02L STANDARD Boa
2.
FRACTURES CONCEPTUALLY DEPICTED ON THIS CROSS SECTION REPRESENT
GENERALIZED ORIENTATIONS OF FRACTURES OBSERVED BASED ON
/
/ ♦1
BEDROCK FLOW LAYER GROUNDWATER
BACKGROUND THRESHOLD
TELEVIEWER LOGGING AT THE MW-208 BOREHOLE. THE DEPICTED FRACTURE
DW-46
WATER SUPPLY WELL
LEVEL ELEVATION
VALUES ga
ORIENTATIONS ACCOUNT FOR APPARENT DIP WITHIN THE PLANE OF THE
ASH PORE WATER
(TRANSITION ROW ZONE)'
CROSS SECTION AND VERTICAL EXAGGERATION. THE ACTUAL NUMBER OF
L
GENERALIZED WATER TABLE
BACKGROUND THRESHOLD
FRACTURES IS FAR TOO NUMEROUS TO ILLUSTRATE AT THIS SCALE. IN
GENERALIZED
LEVEL ELEVATION
VALUES SD
ADDITION, THE DEPTHS AND LENGTHS OF FRACTURES VERSUS DEPTH ARE
�/ I • \
�\
I•►
GROUNDWATER FLOW
(BEDROCK ROW ZONE)'
CONCEPTUAL ONLY.
"� /
♦I
DIRECTION
® MEAN BORON (B) CONCENTRATION (ug/L)
- BA CICGROVND THRESHOLD VALUES WERE CALCULATED
3.
DISPLAYED WATER SUPPLY WELL LOCATIONS REFLECT INFORMATION
'� - \
/
GENERALIZED SUBSURFACE ASH
PORE WATER FLOW DIRECTION
n
WELL SCREEN
CUSINGOLLE DATA FROM BACKGROUND 2010 TO EC EMBER 2018 SAMPLES
COLLECTED NOV EMBER 2a10 TO DECEMBER 2018 AS SUBMITTED
JUNE 2019.
4.
5.
AVAILABLE UP TO DECEMBER 31, 2015.
ALL BOUNDARIES ARE APPROXIMATE.
CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITION.
/ I _ \
": /
/ 1 ,
- _ 1
' \
/ �I
1'/
IMWMI► GENERALIZED VERTICAL
HYDRAULIC GRADIENT
LITHOLOGIC CONTACT
0 ASH
0 ASH PORE WATER
BEDROCK
0 REGOLITH
0 SOIL FILL
— — PREDOMINANT BEDROCK
FRACTURE ORIENTATION
— — — COMPLIANCE BOUNDARY
WASTE BOUNDARY
'DUKE
ENERGY
PROGRESS
161P
synTena
GRAPHIC SCALE
0 100 250 500
HORIZONTAL SCALE: 1" = 500'
VERTICAL SCALE: 1" = 100'
5X VERTICAL EXAGGERATION
DRAWN BY: A.FEIGL
DATE: 08/02/2019
REVISED BY: D. KREFSKI
DATE: 12/13/2019
CHECKED BY: K. LAWING
DATE: 12/13/2019
APPROVED BY: C. EADY
DATE: 12/13/2019
PROJECT MANAGER: C. EADY
LAYOUT: SECTION C-C' (6-26)
www.synterracorp.com
FIGURE 6-25
GENERAL CROSS-SECTION C-C'
WEST ASH BASIN - CONSERVATIVE GROUP
MEAN OF BORON
CORRECTION ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

D D'
(NORTH)
DUKE ENERGY PROGRESS PROPERTY LINE
APPROXIMATE WEST ASH BASIN COMPLIANCE BOUNDARY
APPROXIMATE WEST ASH BASIN WASTE BOUNDARY
600
550
WEST ASH BASIN o
o
InMAIN
DAM ¢o
r
In
co
500
w
Q
N
Q m
N
OUTLET STRUCTURE
FILTER DIKE
ED PRE -DECANTING WATER
450
400
350
300
250
200
150
(SOUTH)
600
550
1500
0 _ _ Q Q - ELEVATION=462' _
- -- ASH- - -- ____ _- 1 ASH
r------- --- --____-------- t___��� --- _---------------- -- ����__ -
--------------------------------------------
-------------------------------------------------------------------------------------------- 450
HEATED WATER - - - - - - - - ------------------------- - - - - ---------------------------_-_-_-_-_-_-_-_-------_-_-_- _ ------�----
DISCHARGEPOND-- - - - - -- _-- ------------------- - - - - - - ----------------------___=ASH
-- - - - - --
---------- _ -_-- _
WATER ELEVATION=412'-_-_-_- _-_-_-_- - - WATER _ - - - - - - - - - - - - - - - - - -- _------_------------------ - WATER ------------------ - - - - - - - - - - -_- ♦ / I�/%�/
—L --- ---------------------------------_---------------------------------------- ---
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BEDROCKi�'��"�i♦''�i\'1�'�iJ/1"�i\''�i\'/\"�i\''/\"�i\'/1" /\' ./ I ./ I ./ I ./ I ./ I ./ `BEDROCK `/ ./ I ./
`mil./�/\.;�rj. \`i �./�/\.��rj.� ice./�/\.;�/j. \`i �♦��/\ i;�/j.� i�♦��/\ i;�rj. \`i �♦��/\.;�rj/� ice./�/\.;�rj. \`i �./�/\.;�/j/� ice./�/\ i;�/j. \`i �♦��/\.;�rj.� i�♦��/\ i;�rj.\`.�./�/\.;�rj. �`i �./�/\.;�rj. \`i �./�/\i;:/I/� ��./�/\ i;�r� 250
hi\I./♦i�i\'/1`��i\I./`i�i\'/\`Chi♦I./♦i�i\'/\`Chi♦I`/�,�i\'/\`C�i\I./�/�.'��"` >I"♦/�i\'/1\I./♦i�i\'/1\/\♦I./♦i�i\'/\\/1\/1\/1\/\`/\\I./`
BEDROCK, /1, , \ /1, , \ /1, / \ /1, / \ /1, / \ /1, , \ /\, �_ , \ /1, / \ /1,
l ♦ ' I \/i l ♦ / I \li / I / \/ i l ♦ / I . \li / / I / \/ i / ♦ I . \/i / I / \/i l ♦ / I . \/i / I / \/i l ♦ / I . \l i / I = \/i l ♦ / I . \li / I / \/i l ♦ / 1 . \li / I / \/ i l \ / I . \li / I / \/i / / I . \/i / I / \/i l / I . \l i / 1 / \/i l ♦ i I . \l i / I / \/i l ♦ i I . \li / I . \i l .`/ 0i ♦ / 1 . \i /.`/ i . /i ♦ / I . \i /.`/ i
: NOTES:
�� l `r' _ - l ` �� l `/' - / ` �- l `/' - l ` �� l `/' - l ` �- l `r' _ - l ` �� / `r' 1. CONCENTRATIONS SHOWN ARE STATISTICAL MEAN
♦ I \ � �rl/\ � I/\ �/I/\ � I/\ � �/I/\�i I/\ � ♦/I�\ � I/\ � �/I.\ � I/\ � �rl/\ � I/_\ � �rl/\ � I/\ i� /I/\ � I/\ � �/I/\�i I/\ � �/I.\ � 1/\ � �rl.\ i� I/\ i� /I�\ i
\iJ/ICALCULATED BASED DNCENTRALTENDENCYOF DATA ET
' / / / / / / / USING DATA RANGING FROM IANUARY 2018 TO IUNE 2019.
//I�/I../` \/ �. /IBC . /` \/ �. /�' �- � /` \/ i . /� i"I� . %. /� �� i` /I� . %. /� . /` \/ �. /I� �� . /` \/ �. /I�� /
2. BORON (B) CONCENTRATIONS ARE IN MICROGRAMS PER
LITER (IJg/Q
NOTE.
LEGEND
ERVOIR
CROSS SECTION D-D' IS LINEAR IN NATURE AND NOT
ALL LOCATIONS ALONG THE CROSS SECTION ARE
PROJECTED ONTO THE CROSS SECTION.
ABMW-1
WELL IN ASH PORE WATER
ASH PORE WATER
NOTES
ABMW-1BR
WELL IN COMPETENT BEDROCK
LEVEL ELEVATION
1. WATER ELEVATIONS REPRESENT THE MANUAL WATER LEVELS COLLECTED FOR
"
BEDROCK FLOW LAYER GROUNDWATER
APRIL 22-23, 2019 FOR EACH WELL. ELEVATIONS WITHIN EACH CLUSTER ARE
POWER PLANT
L
GENERALIZED WATER TABLE
LEVEL ELEVATION
MEASURED IN THE SAME DAY. REFERENCED TO NORTH AMERICAN VERTICAL
GENERALIZED GROUNDWATER
DATUM, 1988.
FLOW DIRECTION
MEAN BORON B
( ) CONCENTRATION (ug/L)
2. FRACTURE OCCURRENCE AND ORIENTATION NOT DEPICTED.
GENERALIZED SUBSURFACE ASH
NO GEOPHYSICAL LOGGING CONDUCTED IN DEEP BEDROCK BOREHOLES SHOWN
PORE WATER FLOW DIRECTION
WELL SCREEN
ON CROSS-SECTION.
GENERALIZED VERTICAL
3. ALL BOUNDARIES ARE APPROXIMATE.
HYDRAULIC GRADIENT
— — COMPLIANCE BOUNDARY
4. CROSS SECTION REPRESENTATIVE OF PRE -DECANTING CONDITIONS.
EAST ASH BASIN
LITHOLOGIC CONTACT
WASTE BOUNDARY
ASH
WESTAS
ASH PORE WATER / WASTEWATER
BASIN
0
BEDROCK
REGOLITH
DUNNgI.Vq� RO
a
SOIL FILL
GRAPHIC SCALE
'°° 250 500
DUKE
HORIZONTAL SCALE:
VERTICAL SCALE: 1" = 100'
ENERGY 10
5X VERTICAL EXAGGERATION
PROGRESS DRAWN BY:A.FEIGL DATE:08/02/2019
REVISED BY: D. KREFSKI DATE: 12/14/2019
CHECKED BY: K. LAWING DATE: 12/14/2019
APPROVED BY: C. EADY DATE: 12/14/2019
O
MANAGER: C.
PROJECINttiyS/�
LAYOUT: SECTION D D' 6-D27)
s)mTerra www.synterracorp.com
WAB EXTENSION IMPOUNDMENT
WATER ELEVATION=446'
' WELLS WITH DATASETS CONTAINING FEWER THAN FOUR
VALID RESULTS, THE MOST RECENT VALID SAMPLE DATA UP TO
TUNE 2019 WAS USED.
NO DATA AVAILABLE
ANALYTICAL PARAMETER
REPORTING UNITS Hg/L
15A NCAC 02L STANDARD 700
BACKGROUND THRESHOLD
VALUES 50
ORANSITION FLOW ZONE]'
BACKGROUND THRESHOLD
VALUES 50
(BEDROCK FLOW ZONE)'
' - BACKGROUND THRESHOLD VALUES WERE CALCULATED
USING DATA FROM BACKGROUND GROUNDWATER SAMPLES
COLLECTED NOVEMBER 2010 TO DEC EMBER 2018 AS SUBMITTE❑
]UNE 2019.
FIGURE 6-26
GENERAL CROSS-SECTION D-D'
WEST ASH BASIN - CONSERVATIVE GROUP
MEAN OF BORON
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

CCR-208S
CW-4
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
8
R
8
7
7
V)
6
a
a 6
5
Sampling event
5
600
400
;
200 E
Sampling events
0
-200 O
450
-400
375
i
300
E
+—+
6500
225
IL
19
O
3
6000
150
-0 E
0
5500
7
77
75
V M
5000 -
w
U
4500
a)
a
to
Sampling events
C
452 Sampling event 3
p 3
451
M 452
� ^
^
2 Go
C
'.C-i
11J 00 450 2
_
1L ()02
450 —
N �
�>
>a
w
4-
448
C
y Q
1 C
J Z 1
J Z
449 f0
L
L V
O:
N I1F
r
M 446
3
448 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
CCR-208S: Shallow flow zone monitoring well located
CW-4: Transition flow zone monitoring well located
along the waste boundary. See Figure 6-28 for
southwest of the WAB. See Figure 6-28 for
monitoring location.
monitoring location.
LEGEND
NOTES
NAVD 88 - North American Vertical Datum
—
pH (S.U.)
in - inches
—
Oxidation Reduction Potential (ORP) (mV)
mV - millivolts
—
Specific Conductivity (pS/cm)
S.U. - standard unit
Daily Total Rainfall (inches)
fenDUKE
DRAWN BY: D. AVARD
DATE:: 10/31/2019
ENERGY.
REVISED BY: M. ROZIER
FIGURE 6-27
PROGRESS
CHECKED BY: K. LAWING
GEOCHEMICAL WATER QUALITY PLOTS
APPROVED BY: K. LAWING
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
trip
PROJECTMANAGER: C. EADY
SEMORA, NORTH CAROLINA
www.synterracorp.com
synTerm

Note: Transition Zone Groundwater Legend Affected Bedrock Groundwater Legend
*-Sampling ■ CCR-202D o ■ ABMW-1BR ElCCR-207BR ■ CW-2D A MW-24BR
R
events prior to CW-5 1� ■ ` • ABMW-2BR O CCR-208BR • CW-3D p MW-25BR
1/1/2018 • CCR-203D Cr � �w A ABMW-3BR A CCR-209BR 0 HWMW-iBR 0 MW-31BR
■ CW-2 • MW-39D o' ■ MW-12BR
v �o s ABMW-36RL p CCR-210BR Z MW-32BR
• CW-3 A MI+V-5D / �' • P \ ■ BG-iBRLR 0 CCR-211BR ■ MW-205BRL y MW-33BR
A CW-4 V MTV-6D ■ CCR-200BR X CCR-212BR A MW-205BRLL MW-39BR
V ■ CCR-201BR * CCR-213BR V MW-205BRLLL MW-4BR
# A CCR-202BR ■ CCR-214BR ♦ MW-208BRL MW-6BR
Potential V CCR-203BR • CCR-215BR z MW-208BRLL MW-5BR
Ash Pore Water ��
Legend Mixing • ♦ CCR-204BR A CCR-216BR * MW 208BRLLL MW-7BR
' Z CCR-205BR V CCR-217BR ❑ MW-22BR MW-8BR
■ ABMW-1 Generally O MW-23BRR
• Unaffected
aoo * CCR 206BR ♦ CCR 2186R MW 9BR
ABMW-2 Una
80% df - 80% R
o' a� ` Affected
40 60% a � ZU 60% (P r
Affected x / � e, \ 1
440% * q
■ R 1r r ono , • Potential
• � ` � 0% 1• � " ' • �`y Mixing
Potential 20% *ik • 20% / \
Mixing `y • v
Ca — Transition Zone — cl -.* Generally
Generally ' Unaffected
Unaffected* ■ •
0
•�� • ■ BG-01 ❑ MW-15D
• BG-01BR O MW-18BR
I A BG-02BR A MW-18D ' R
CCR-112BR-BG p MW-19BRL
♦ MW-10BR 0 MW-26BR �
6 60' sQ Z MW-1413R g MW-2913R /40%
/40% • ' 40_�,\ * MW-15BR * MW-3013R j •
V", V Background ZOO' of •fly • 3;
zo+b+ T i Groundwater It
•
0 0 ' Legendst�} 4, f r r
$ ♦- Ce — Bedrock Zone — a
Ca — Shallow Zone — CI
DUKE DRAWN BY: R. BADUM DATE: 12/8/2019 FIGURE 6-28
Shallow Groundwater Legend ENERGY REVISED BY: R. BADUM ASH PORE WATER AND
PROGRESS CHECKED BY: K. LAWING GROUNDWATER PIPER DIAGRAMS
■ CCR-203S ♦ CCR-209S APPROVED BY: K. LAWING
WEST ASH BASIN
• CCR-206S Z CCR-210S PROJECT MANAGER: C. EADY CORRECTIVE ACTION PLAN UPDATE
A CCR-207S * CCR-211S 47 ROXBORO STEAM ELECTRIC PLANT
CCR-208S ■ MW-2 synTerra www.synterracorp.com SEMORA, NORTH CAROLINA

MW-2 ABMW-3
ABMW-3BR
ABMW-1
FGD� ABMW-1BR
CCR-206S POND ABMW-1 OWAU 30'
I, ABMW-1 OWAM 30'
WEST ASH
BAST ABMW-2
CCR-208BR S ABMW-2BR
CCR-213BR
n
sFMORq Ro , ' ,
DFA
HANDLING
AREA
.0000 • � .
V � ♦
�t I
a,� I
- - o ,
I
1000,
NOTES:
J♦
L.O. � *'EDUKE
ERGY
-I PROGRESS
synTerra
GRAPHIC SCALE
700 0 700 1,400
(IN FEET)
DRAWN BY: J. KIRTZ DATE: 05/30/2019
REVISED BY: J. KIRTZ DATE: 12/26/2019
CHECKED BY: K. LAWING DATE: 12/26/2019
APPROVED BY: K. LAWING DATE: 12/26/2019
PROJECT MANAGER: C. EADY
FIGURE 6-29
DECANTING MONITORING NETWORK
WEST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

ABMW-1 Ash Pore Cluster
ABMW-1 Cluster
ABMW-2 Cluster
3
3
3
463
464
464
00
00
00
0
G
G 462
Q
Q
Q
Z 463
11
2
Z
463
2
Z
2
o
„
o
„
o
4.1
i `C
��"I
_
+
>
_
w
+�
> 461
_
,m
w 462
I
w
462
w
L
a 461
L
a
461
L
a 460
3
3
3
0
459
0
460
460
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
ABMW-1 OWAU Water Elevation (NAVD 88)
ABMW-1 Water Elevation (NAVD 88)
ABMW-2 Water Elevation (NAVD 88)
ABMW-1 OWAM Water Elevation (NAVD 88)
ABMW-1 BR Water Elevation (NAVD 88)
ABMW-2BR Water Elevation (NAVD 88)
ABMW-3 Cluster
CCR-206S
452
CCR-208 Cluster
3
466
3
456
3
00
00 464
00
00
00
00
>
>
455
0451
z
2
z
2
z
2
0 462
o
V
o
>
>
454
>450
d
w
0
a)
C
a�
0
Z
@
@
+�,,�
L
L
W
453
L
aA.,
M
3
M
3
M
3
444
�
I
� I
'
I
0
452
0
t
448 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
ABMW-3 Water Elevation (NAVD 88)
CCR-206S Water Elevation (NAVD 88)
CCR-208S Water Elevation (NAVD 88)
ABMW-3BR Water Elevation (NAVD 88)
CCR-208BR Water Elevation (NAVD 88)
LEGEND
DUKE
tl�ENERGY
DRAWN BY:D.AVARD
DATE:12/8/2019
FIGURE 6-30a
Daily Total Rainfall (inches) Notes:
REVISED BY: D.AVARD
HYDROGRAPHS
Ash Pore Water in - inches
PROGRESS
CHECKED BY:K.LAWING
WEST ASH BASIN
Secondary Ash Pore Well NAVD 88 - North American
Vertical
Datum
1988
BY: K.LAWING
CORRECTIVE ACTION PLAN UPDATE
Passive decanting began December 2018
Shallow Flow Zone Data range from March 29 to August 31, 2019
0APPROVED
ROXBORO STEAM ELECTRIC PLANT
Bedrock Flow Zone
wnTerra
PROJECT MANAGER:
SEMORA, NORTH CAROLINA
www.synterracorp.com

CCR-213BR
CCR-217BR
CW-4
472
3
456
3
3
00
00
00
00
454
�.
00
00
452
0
470
;
Z
Z
;
2
2
Z
2
c
c
c
452
c
c
°
450
^
=
:.
>
468
w
>
w
>
�
c
�
c
2
_
>
1
>
450
L
L
i
448
4W,
466
I �,
3
M
3
448
-
0
446
0
464 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
- CCR-213BR Water Elevation (NAVD 88)
CCR-217BR Water Elevation (NAVD 88)
CW-4 Water Elevation (NAVD 88)
MW-2
412
3
00
00
G
411
Z
2
c
O
c
V
f6
410
�
c
W
M
>
a�
1
J
409
3
408 0
4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019
9/1/2019
Date
MW-2 Water Elevation (NAVD 88)
LEGEND
r' DUKE
DRAWN BY: D.AVARD
DATE:12/8/2019
FIGURE 6-30b
Dail Total Rainfall inches
Y (inches) Notes:
ENERGY
REVISED BY:D. AVARD
HYDROGRAPHS
Shallow Flow Zone in - inches
PROGRESS
CHECKED BY: K. LAWING
WEST ASH BASIN
Transition Flow Zone NAVD 88 - North American
Vertical Datum
1988
BY:K. LAWING
CORRECTIVE ACTION PLAN UPDATE
Bedrock Flow Zone Passive decanting began December 2018
0APPROVED
ROXBORO STEAM ELECTRIC PLANT
Data range from March
29 to August
31, 2019
PROJECT MANAGER: C. EADY
syrlTerra
SEMORA, NORTH CAROLINA
www.synterracorp.com

I
p
DECOMMISSIONED SLUICE
LINEAREA
T,
• � 1
• a
�•• w
1100
I It
o � ■
.-.
4
`. ♦ i--.•
1 �-
•��
J ♦ �
♦ /
I �
.10
�. .�•
It(' DUKE
ENERGY
PROGRESS
..001
-7 r-j
ol
L
(IN FEET)
DRAWN BY: C. WYATT DATE: 10/30/2019
REVISED BY: C. WYATT/K. KING DATE: 12/26/2019
CHECKED BY: K. LAWING DATE: 12/26/2019
APPROVED BY: K. LAWING DATE: 12/26/2019
PROJECT MANAGER: C. EADY
LEGEND
NOTES:
FIGURE 6-31a
ISOCONCENTRATION MAP
BORON IN SAPROLITE/TRANSITION FLOW ZONE
WEST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

I
EASTASH
HEATED WATER 6'"PDECOMMI:
SIONED SLUICE BASIN
DISCHARGE EAREA
POND ��
4
l '
,;,A400MER
�( 1%
l • �
oo
le
r♦ /
1 • /
♦
■
/ � I
FILTER DIKE
� % I
.�� ` I
1
It(' DUKE
ENERGY
PROGRESS
L
(IN FEET)
DRAWN BY: C. WYATT DATE: 10/30/2019
REVISED BY: C. WYATT/K. KING DATE: 12/26/2019
CHECKED BY: K. LAWING DATE: 12/26/2019
APPROVED BY: K. LAWING DATE: 12/26/2019
PROJECT MANAGER: C. EADY
LEGEND
FIGURE 6-31b
ISOCONCENTRATION MAP
BORON IN BEDROCK FLOW ZONE
WEST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

i Sample ID(Depth)
PSB-29 (1.5-2)
CHROMIUM
IRON
Sample ID(Depth)
MW-208BRL (4-5)
IRON
Sample ID(Depth)
PSB-28 (1.5-2)
IRON
Sample ID (Depth)
MW-09 (0-2)
Sample ID(Depth)
MW-205BRL (4-5)
Sample ID (Depth) 9
PSB-31 (1.5-2) {
r IRON
Sample ID (Depth)
12BR (0-2)
Sample ID (Depth)
MW-08 (0-2)
MW-08 (14-16)
MW-08 (21-23)�
Y
A
Sample ID (Depth) Sample ID(Depth)
.. MW-07 (0-2) PSB-25 (1.5-2)
IRON I COBALT
r ■ IRON
/ MANGANESE
r
�•J ��
.1e /
Sample ID(Depth)
BGSB-02 (4-5)
k' IRON
BGSB-02 (7-8)
Sample ID (Depth)
MW-15 (0-2)
CHROMIUM
IRON
Sample ID(Depth)
MW-05BR (1-2)
MW-05BR (5-6)
Sample ID(Depth)
PSB-32 (1.5-2)
CHROMIUM
COBALT
IRON
MANGANESE
: .. i (:�7�
Sample ID(Depth)
PSB-34 (1.5-2)
IRON
Sample ID(Depth)
PSB-35 (1.5-2)
Sample ID(Depth)
�J
PSB-27 (1.5-2)
IRON
Sample ID(Depth)
- ` PSB-26 (1.5-2)
Sample ID (Depth)
SB-31 (0.5-1)
COBALT Sample ID(Depth)
MANGANESE PSB-24 (1.5-2)
`•. Sample ID (Depth)
`.� MW-04 (0-2)
• MW-04 (23-25)
Sample ID (Depth) CHROMIUM
` BG-01BR (0-2) \' .- L�) �
Sample ID (Depth)
PSB-23 (1.5-2)
CHROMIUM
COBALT
IRON
MANGANESE
Sample ID (Depth)
PSB-20 (1.5-2)
Sample ID(Depth)
PSB-19 (1.5-2)
6
� - r--t
-1
Sample ID (Depth)
PSB-18 (1.5-2)
Sample ID(Depth)
PSB-33 (1.5-2)
IRON
Sample ID(Depth)
PSB-13 (1.5-2)
CHROMIUM
COBALT
IRON
MANGANESE
Sample ID (Depth)
PSB-36 (1.5-2)
Sample ID(Depth)
PSB-17 (1.5-2)
v
Sample ID(Depth)
PSB-06 2)
CHROMIUM
COBALT
MANGANESE
V,
Sample ID (Depth)
PSB-12 (1.5-2) �/■
Q /
V■
Sample ID(Depth)
PSB-14 (1.5-2)
• Sample ID(Depth)
PSB-15 (1.5-2)
MANGANESE
Sample ID(Depth)
PSB-16 (1.5-2)
CHROMIUM
tDUKE
ENERGY
PROGRESS
141P
synTerra
■ ww
'
I
1
�
Sample ID (Depth)
,
I
MW-10BR (0-2)
■
IRON
Sample ID(Depth)
PSB-07 (1.5-2)
CHROMIUM
L
COBALT
.
IRON
MANGANESE
`. J:
' • 1
w
■
Sample ID (Depth)
' •
'
• � I
PSB-08 (1.5-2)
.. _
CHROMIUM
COBALT
IRON
MANGANESE
LEGEND
O BACKGROUND LOCATION WITH NO EXCEEDANCES
O LOCATION WITH NO EXCEEDANCES
Sample ID(Depth)
PSB-09 (1.5-2)
CHROMIUM
BACKGROUND LOCATION WITH ONE OR MORE
EXCEEDANCES
COBALT
LOCATION WITH ONE OR MORE EXCEEDANCES
IRON
ASH BASIN WASTE BOUNDARY
MANGANESE
. _ . ASH BASIN COMPLIANCE BOUNDARY
Sample ID (Depth)
SOLID WASTE LANDFILL BOUNDARY
SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS PROPERTY LINE
EFFLUENT DISCHARGE CANAL
PSB-10 (1.5-2)
Sample ID (Depth)
PSB-11 (1.5-2)
STREAMS (AMEC NRTR)
Sample (Depth)
r/WETLANDS (AMEC NRTR)
�
BGSB-18 (2-3)
NOTES:
BGSB-18 (4-5)
1. DISCRETE SOIL SAMPLES EXCEED COMPARATIVE CRITERIA FOR CONSTITUENTS LISTED
BGSB-18 (7-8)
UNDER THE SAMPLE ID. REFER TO TABLE 6.23 FORA SUMMARY OF UNSATURATED SOIL
ANALYTICAL RESULTS.
BGSB-18 (9-10)
2. DUKE ENERGY PROPERTY LINES ARE REPRESENTED BASED ON DUKE ENERGY'S
BGSB 18 12-13
INTERPRETATION OF HISTORICAL DOCUMENTED PROPERTY BOUNDARIES AND CURRENT
( )
PERSON COUNTY GIS.
Sample ID (Depth)
MW-18 (0-2)
MW-18 (31-33)
MW-18 (37-38)
Sample ID(Depth)
MW-39D (2-4)
MW-39D (6-8)
GRAPHIC SCALE
580 0 580 1,160
(IN FEET)
DRAWN BY: C. WYATT DATE: 05/03/2019
REVISED BY: C. WYATT/K. KING DATE: 12/18/2019
CHECKED BY: K. LAWING DATE: 12/18/2019
APPROVED BY: K. LAWING DATE: 12/18/2019
PROJECT MANAGER: C. EADY
3. ALL BOUNDARIES ARE APPROXIMATE
4. SAMPLE LOCATIONS WERE DERIVED FROM VARIOUS SOURCES AND ARE A MIX OF
SURVEYED AND APPROXIMATE LOCATIONS. THEREFORE, SAMPLE LOCATIONS ARE TO BE
DEEMED APPROXIMATE.
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT (NRTR) FOR ROXBORO
STEAM ELECTRIC PLANT DATED JUNE 2015.
6. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
7. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 6-32
UNSATURATED SOIL SAMPLE
LOCATIONS AND EXCEEDANCES
WEST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

i
r CW-2/D MW-5D/BR
M y 9BR �' r � HWMW-1 BR CCR-200BR
•� CCR-203S/D/� CCR-201BR
� _ CCR-202D/BR
1 CCR-204BR
CCR-205BR
Y ®MW-205BRL/BRLL/BRLLL
MW-8BR� ♦ •'
1
MW-12BR
■ � CCR-206S/BR
♦
CCR-207S/BR
MW-33BR � r.
CCR-208S/BR MW-208BRL/BRLL/BRLLL
♦
♦
♦ CCR-209S/BR
I�1
M MW-32BR CCR-210S/BR
i
♦ CCR-211S/BR
♦,
r
WESTERN DISCHARGE CANAL
WESTASH
BASIN
1
1
'r
•. MW-15D/BR .�•-�,
sFMoaq Ro � �'
s
I
EASTASH
BASIN
LCID LANDFILL
��E
M
�
t �r•A•
1
ICI
♦ •
DUNNAWAY RD
♦• ter.—.��
MW-10BR
i
r
•
I
I
A
�
MW-26BR �
r
-
1
1
I+
f
f ,
. I
• I1
AV
■
T �.
/ • i
r.
LEGEND
t Q� PROPOSED PERFORMANCE MONITORING WELL
x `
'♦ 1 II
DUKE
GRAPHIC SCALE
• 500 0 500
ENERGY
PROGRESS
s)mTerra
—ASH BASIN WASTE BOUNDARY
- -ASH BASIN COMPLIANCE BOUNDARY
SOLID WASTE LANDFILL BOUNDARY
• SOLID WASTE LANDFILL COMPLIANCE BOUNDARY
EFFLUENT DISCHARGE CANAL
DUKE ENERGY PROGRESS PROPERTY LINE
STREAMS (AMEC NRTR)
® WETLANDS (AMEC NRTR)
■ I NOTES:
1,000
(IN FEET)
DRAWN BY: J. KIRTZ DATE: 06/05/2019
REVISED BY: J. KIRTZ DATE: 12/23/2019
CHECKED BY: K. LAWING DATE: 12/23/2019
APPROVED BY: K. LAWING DATE: 12/23/2019
PROJECT MANAGER: C. EADY
1. WELLS INDICATED WITH RED FONT WILL HAVE GEOCHEMICAL SONDES FORTELEMETRY
MONITORING
2. 130-1, BG-1BR, BG-2BR, MW-10BR, MW-15BPJD, MW-18BRID, AND MW-26BR ARE APPROVED
BACKGROUND GROUNDWATER MONITORING LOCATIONS.
3. ALL BOUNDARIES ARE APPROXIMATE
4. AERIAL PHOTOGRAPHY OBTAINED FROM GOOGLE EARTH PRO ON OCTOBER 11, 2017.
AERIAL WAS COLLECTED ON JUNE 13, 2016.
5. THE WATERS OF THE US DELINEATION HAS NOT BEEN APPROVED BY THE US ARMY CORPS
OF ENGINEERS AT THE TIME OF THE MAP CREATION. THIS MAP IS A PRELIMINARY
JURISDICTIONAL DETERMINATION ONLY. THE PRELIMINARY WETLANDS AND STREAMS
BOUNDARIES WERE OBTAINED FROM AMEC FOSTER WHEELER ENVIRONMENTAL &
INFRASTRUCTURE, INC. NATURAL RESOURCE TECHNICAL REPORT(NRTR)FOR ROXBORO
STEAM ELECTRIC PLANT DATED JUNE 2015.
6. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINASTATE PLANE
COORDINATE SYSTEM FIPS 3200 (NAD83).
FIGURE 6-33
CONFIRMATION MONITORING PLAN NETWORK
WEST ASH BASIN
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA

Interim
Monitoring Plan Corrective Action
(IMP) sampling H
Plan Approval
Confirmation Monitoring Plan (CMP)
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,
is the boron plume
stable at the
compliance
boundary?/
1►[7
Evaluate contingency to determine
if additional data needed to
validate conditions and/or to
update CAP; continue with CMP
Notes:
NCAC - North Carolina Administrative Code
02L - NCAC Title 15A, Subchapter 02L. Groundwater Classification and
Standards
Yes
Continue CMP sampling Continue PCMP sampling
and Annual Review and and Annual Review and
Reporting I I Reporting
""I\
Is the ash basin
certified closed?
No
Are the groundwater
monitoring results
below applicable
standards at the
compliance boundary
for three years?
Post -Closure Monitoring Plan (PCMP)
Post -closure monitoring to begin
Yes following closure certification.
Monitoring parameters and locations
to be determined at that time and in
accordance with G.S. 130A-
309.214(a)(4)k.2.
Yes
Based on \
annual evaluation,
is the plume stable
at the compliance
boundary?
1►C7
Yes Request completion of CMP
corrective action plan monitoring
or
Request completion of PCMP post -closure monitoring
in accordance with G.S. 130A-309.214(a)(3)b
DUKE
tENERGY
PROGRESS
DRAWN BY: T. PLATING
REVISED BY: J. WYLIE /K SHECK
CHECKED BY: K. LAWING
APPROVED BY: K. LAWING
PROJECT MANAGER: C. EADY
DATE: 10/112019
DATE: 12/16/2019
DATE: 12/16/2019
DATE: 12/16/2019
trip
I www.synterracorp.com
s)"Terra
FIGURE 6-34
CONFIRMATION MONITORING
PLAN WORK FLOW DIAGRAM
CORRECTIVE ACTION PLAN UPDATE
ROXBORO STEAM ELECTRIC PLANT
SEMORA, NORTH CAROLINA