NC0038377_Figures_20150902

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�v
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j
I J fi I
SOURCE:
USGS TOPOGRAPHIC MAP OBTAINED FROM THE NRCS GEOSPATIA71ATA
GATEWACI AT http://datagateway.nres.usda.gov/
MAYO LAKE POWER PLANT
PERSON COUNTY FIGURE 1-1
SITE LOCATION MAP
GREENSBORO. MAYO STEAM ELECTRIC PLANT
*RALEIGH
GREENVILLE 10660 BOSTON RD
EEN•
Terra •CHARLOTE *FAYETTEVILLE ROXBORO, NORTH CAROLINA
CLUSTER SPRINGS, VA QUADRANGLE
148 RIVER STREET, SUITE 220 WILMINGTON
GREENVILLE, SOUTH CAROLINA DRAWN BY: 1. CHASTAIN DATE: 201412-22 GRAPHIC SCALE
PHONE [phone] PROJECT MANAGER: K. WEBB CONTOUR INTERVAL: 10R 1000 0 1000 2000
PHONEnterrac 1-99 9 LAYOUT: FIG 1(SITE LOCATION MAP) MAP DATE: 1987
www.syP:\Duke Energy Progress. 026\ 0a. Mayo Asft Basin GW Assessment Plan\i.11 GSA Reporting\Figures\FIGURE - - SGS SITE LOCATIONI.dwg IN FEET

VIRGIN,IA`
L
V I R G I N I A
rH'
NORTH CIA R 0 L I N A NORTH' CAROLI
/;-�-��,. = � �� . �®•
I r
/ r
FRW
•
MAYO ASH i Lr',
BASIN ! �..: "1'A • .,
�, . • - _ MAYO, PLANT `� ems.• Cr=
hL". a I,MONOFI r ', F `
, '
MAYO
LAKE
MAYO
•• ? ... PLANT
7.
y '
1---------- f.
LQUISIAN
C.
' J
\ •�� /
•L 1
...
4. 1 �� `�; . _ rJ.
LEGEND
bP STREAM
STATE BOUNDARY
ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
:. 7 S��yp1
NOTES:
2014 NAIP AERIAL ORTHOIMAGERY OBTAINED FROM THE ARCGIS IMAGE
SERVICE, SERVICE NAME: NAIP/North_Carolina_2014_1m. (httpsl/gis,apfo.usda.gov)
2 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://servioes.noonemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE
PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011).
�11
synTerra
148 RIVER STREET, SUITE
GREENVILLE, SC 29601
664421-9999
www.synterracorp.com
DRAWN BY: R. SPRING
��DUKE
ENERGY DATE: 08/26/2015
PROGRESS CHECKED BY: J. MEADOWS
MAYO STEAM ELECTRIC POWER PLANT DATE: 08/26/2015
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
PROJECT MANAGER: J. WYLIE
NA
L
0
GRAPHIC SCALE
750 0 750 1,500 2,250 3.000
IN FEET
FIGURE 1-2
MAYO PLANT VICINITY MAP

RAI�ROgD
IF
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5/! 1`BR 341
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HALIFAX CO,
- � -- - 1 PERSON CO
/FUTURE MAYO LA � � .
l '- - - %
/ 1
FUTURE1981
/ LANDFILL
r PERMIT NO. 73-B 01
\♦ FUTURE ACTIVE
\ ASH BASIN
1
—FUTURE\
_
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MAYO LAKE.
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Hill
MAYO STEAM
ELECTRIC PLANT
MontaguE � `-• \ _'
C e m
/
Illy
Bethel Hill. 1
SOURCE: y) Ilk
USGS TOPOGRAPHIC MAP OBTAINED FROM NRCS GEOSPTIAL DATA GATEWAY AT i
http://datagateway.nres.usda.gov/ ��
PERSON COUNTY FIGURE 2-2
GREGN5130WWILMINGTOIN
1968 USGS TOPOGRAPHIC MAP
DUKE ENERGY PROGRESS
MAYO STEAM ELECTRIC PLANT
Terra � ROXBORO, NORTH CAROLINA
CLUSTER SPRINGS VA -NC QUADRANGLE
148 RIVER STREET, SUITE LIN DRAWN BY: JOHN CHASTAIN DATE: 08/16/2015
GREENVILLE, SOUTH CAROLINA GRAPHIC SCALE
PHONE [phone] PROJECT MANAGER; JERRY WYLIE CONTOUR INTERVAL: 10 FEET 1000 0 1000 2000
www.synterracorp.com LAYOUT: FIG 2-2 (1968 USGS TOPO MAP) MAP DATE: 1968
P: Duke EnergyPro ress.1026 105. Mao Ash Basin GW Assessment Plan 1.11 CSA Re ortin Fi ures DE MAYO 1968 USGS TOPO MAP.dw IN FEET

4
y �
•
FUTURE ACTIVE
ASH BASIN
FUT�1111 ! ..
LANDFILL �� \
PERMIT NO. 73-B /
4.•j�:e�\
z FUTURE POWER PLANT
WmFIIMAY0 STEAM /—
ELECTRIC PLANT
x
(q
W
-~`
SOURCE:
MARCH 25, 1948 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITE AT
http://earthexplorer.usgs.gov/
L
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/i 1 e000*
1 ♦l 1• s
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10
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1 I
GRAPHIC SCALE
500 0 500 1000
IN FEET
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
wwwsynterracorp.com
synTerra DRAWN BY JOHN CHASTAIN DATE 08/11/2015
n PROJECT MANAGER: JERRY WYLIE
\ 1, LAYOUT: FIG 2-3 (1948 AERIAL)
\., 08/29/2015 9:11 PM P:\Duke Energy Progress.1026\105. 1
FIGURE 2-3
1948 AERIAL PHOTOGRAPH
DUKE ENERGY PROGRESS
MAYO STEAM ELECTRIC PLANT
ROXBORO, NORTH CAROLINA

T�Z
J\
SOURCE:
JANUARY 24, 1981 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS
EXPLORER WEB SITE AT http://earthexplorer.usgs.gov/
11
ACTIVE
POWER PLANT
IlMEMili.- ''"'_" I
MAYO STEAM
ELECTRIC PLANT
H
FUTURE 1981 —� ;
a LANDFILL ♦ \ \♦/ \ / \
PERMIT NO. 73-84.
/ 1
1 1
/
\1
FUTURE MAYO LAKE
/
F / I
l /
it 1
/
\�
)(A \ I
/•If/
GRAPHIC SCALE
500 0 500 1000
IN FEET
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.synte rraco rp. co m
JOHNIN DATE 08/11/2015
PROJECT MANAGER:R: JERRJERRY WYLIE
TerraiDRAWN8Y
OUT: FIG 21(1981 AERIAL)
LAYR/
916 PM a niiva cncrav ornarccc 1n n 1 nS i
Q/ n1 721
FIGURE 2-4
1981 AERIAL PHOTOGRAPH
DUKE ENERGY PROGRESS
MAYO STEAM ELECTRIC PLANT
ROXBORO, NORTH CAROLINA

�u lr
•
-— • FOMAVO
M
♦
ACTIVE ASH BASIN
1981LANDFILL `� G-�♦�,j/,,�� j�j f\ i/ \ ,
PERMIT NO. 73-8 l \ A i • i \♦ r/ \
4.
..............
<N ooPoyP�'\I MAYO LAKE
POWER PLANT
;
I /
If If
MAYO STEAM
! ELECTRIC PLANT
r
SOURCE rx`
1993 AERIAL PHOTOGRAPH OBTAINED FROM THE USGS EARTH EXPLORER WEB SITE AT \ \
http://earthexplorer.usgs.gov/ ♦ 1 I 1

t Evaporation Outfall Dug
11 E
ling Towers 1a III Maya Reservoir Storm water
Outfall 001
14 2 1
14
3
Misc. Equlpmenl Heat 18 Make Structure r�4
Exchangers —
13 Alternate 26 S
� Fe
Water Storage
Ash Sluice Protection
Wales I P 1 1
112
Boiler 6 Turbina Condensate
Storage
Evap and seepage
Ash Basin
vutiau 1 11 1 Gypsum and
See Page OD9 Llmestane Pile
2 and 3 of 7 3 15 Runofi t7
Coal P" A.000 Road Skim econdary Contatnment
FGfl Blowdawn Runoff 'water, Power botch SW ar anhydreus ammonia
Highway 601 AfgR, tanks
ralaFall
Mayo Reservoir
Ion Exchange
Potable water From
City of Roxwro
Potable &
Sanitary
8 Misc.low
Volume
Duke Energy Progress, Inc.
Mayo Stearn ElectrlaPlanl
Person County, NC
SChemallcot Water Fbw
P 1 of 7 octobe
4
Ash basin
FGD Make-up Pumps
AN
38 (alternate)
cE
27
DI botto�ash
'
seal wa
29
Evaporation
FGD System
37
E�
ly '
r
Cooling Towers
Excess Manaflll teachate
Settling Pond
_______
_
33
Bottom Ash Silo
3g
36
Fly Ash Silas 34
Thermal Evaporator
32
Clean Distillate
_ Demin-Bialer
(Conditioning Water)
31
Make-up
35
Cooling water
Monoflll
3s
r
puke Energy Progress, Inc.
Proposed Water balance detail
+aye steam Electric Plant
Rainfall
Dust
for thermal evaporator
Person County,14C
suppression
and Dry bottom Ash system
Schematic of Water Flow
Pape 3 of 7 oco6er
Sewage
treatment
Oily Waste
Treatment
7
A
16 OuHall002 Mayo Reservoir
11 CodingTowers d
Ouitrall 001
14 41
L._._._._._._--------.._..-----.--_._ ............ Proposed Future
25 24 i Side Stream
14 2
Misc, Equornanl He 18
Intake 2 20
Exchangers Intake t FGD 19 , FGD System
28
12
i 21
Bottom Ash Condensers
Sluice Water
Fartxlss Mcnoittl Leachate FGD Setging Pond
3
Alternate 12 Boiler B Turbine
22
Emergency Ovaraow
Flush Pond
9
Outiall DD9 Bloreaclor
Ash Basin 23
Duke Energy Pi
Water balance detail for FGD WW Mayo slaam El
treatment system (bloreaclor) and Person County,
Cooling System only Schematic of w
Page 2of7
Potential Dust
Groundwater • suppression For-
irrigation
Outfall 004
Storm water
Switchyard C]ulfahs
runoff la 006a 006a, b, c, d
and e
Potential
Cooling Tower
Draft
Outfail 005
Potential Dust
Groundwater A suppression
irrigation
Storm water
Proposed Water balance detall
for thermal evaporator
and Dry bottom Ash system
Mayo Reservoir

r Y �
J y F
E
R
An
!,,-��
Fw xsxaza9 ac cono 4 m cm ft) -
Figure 5: Known sample of ash for comparison.
Figure 3-1: Known sample of ash for comparison. (Source: Duke Energy 2014)
Range (10`" percentile — 901" percentile) in bulk composition of fly ash, bottom ash, rock, and soil. (Source: EPRI 2009a)

100%
90%
p 80%
p 70%
a
0 60%
U
cv 50%
0
,~40%
6
c 30%
20%
10%
0%
Volcanic Ash Shale Fly Ash Bottom Ash
■Si ■AI Fe Ca ■Other Major Elements ■Minor Elements ■Trace Elements
Figure 3-2: Elemental composition for bottom ash, fly ash, shale, and volcanic ash. (Source: EPRI 2009a)

C
J_
E 10
v
O 1
0.1
v
= 0.01
O
V
a 0.001
J
U
H
0.0001
0.00001 '
As Ba
Me>orfwjM
9oRh Percentile TCLP Regulatory Lunt
loth Peroentiie
Mirwnnxn
Cd Cr Pb
Element
Hg Se Ag
Figure 3-3: Coal ash TCLP leachate concentration ranges compared to regulatory limits. (Source: EPRI 2010)

100000
10000
a7 1000
tM
E l00 •
•
v
10
loop
0.1
0.01
0.001
As Ba Cd Cr Pb Hg Se Ag Sb Be B Co Cu Mn Ni TI V Zn
EPA Residential Soil Screening Level Element
*Concentrations less than
Fly Ash Range (1021 and 90m percentile) method detection limits.
Figure 3-4: Trace element concentration ranges in fly ash compared to EPA residential soil screening levels. (Source: EPRI 2009b)
Page 1 of 2

100000
10000
Y
1000
CM
E
100
r.
Q
10
cc
L
V
0
0.1
0.01
IIII%III
�
I
•
•
1•
••
I
I
I
I
As Ba Cd Cr Pb Ng Se Ag Sb Be B Cu Mn Ni TI V Zn
S EPA Residential Soil Screening Level Element
*Concentrations less than
Bottom Ash Range (1014 and 90 percentile) method detection limits.
Trace element concentration ranges in bottom ash compared to EPA residential soil screening levels. (Source: EPRI 2009b)
Page 2 of 2

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FACING NORTHEAST
LEGEND
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COAL ASH
TRANSITION ZONE
BEDROCK
REGOLITH
SOIL/FILL
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
4.4 x 10-4 K Value
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BLE) f,
SAMPLE DESCRIPTIONS
metals TOTAL METALS
TOC TOTAL ORGANIC CARBON
IP GRAIN SIZE, MOISTURE CONTEXT
HC HYDRAULIC CONDUCTIVITY, SPECIFIC GRAVITY
SPLP SYNTHETIC PRECIPITATION LEACHING
PROCEDURE
Kd SORPTION COEFFICIENTS
HFO HYDROUS FERRIC OXIDES
min MINERALOGY BY X-RAY DIFFRACTION AND
WHOLE ROCK CHEMISTRY
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY DATED
MAY 19, 2015 WAS OBTAINED FROM WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND COMPARISON TO
AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG TOPOGRAPHY IS FROM
SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS INSTALLED PRIOR TO
2015 TAKEN FROM S&ME (2010) AND QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL I DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 6-1
DUKE
GRAPHIC SCALE ENERGY
300 0 300 600 PROGRESS
IN FEET
MAYO STEAM ELECTRIC PLANT
HORIZONTAL: 1"=300'
10660 BOSTON RD
30 0 30 60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL:1"=30' FIGURE 6-1
NOTE: 10:1 VERTICAL EXAGGERATION GEOLOGIC CROSS SECTION A -A'

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ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
o FRACTURED/OXIDIZED ZONE
^� OBSERVED IN ROCK CORE
W 0
E = 4.4 x 10-4 K Value
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BLE)
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O o O O O O O O
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(feet) TOC
SECTION C-C' IP
FACING NORTH
HC
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19'
MIN
0
550
- 540
- 530
- 520
- 510
- 500
- 490
- 480
- 470
- 460 o co
- 450 0
w�
440
- 430
- 420
- 410
- 400
- 390
- 380
- 370
360
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+
+
+
+
+
O
—
N
CO
�
LO
(D
f—
CO
O
O
—
N
co
�
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(D
fl-
M
M
ti
�
ti
ti
�
ti
rl-
I—
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CO
co
CO
co
co
CO
co
co
CO
co
EAST
SECTION C-C'
FACING NORTH
SPLP
Kd
HFO
SAMPLE DESCRIPTIONS
TOTAL METALS
TOTAL ORGANIC CARBON
GRAIN SIZE, MOISTURE CONTEXT
HYDRAULIC CONDUCTIVITY, SPECIFIC GRAVITY
SYNTHETIC PRECIPITATION LEACHING
PROCEDURE
SORPTION COEFFICIENTS
HYDROUS FERRIC OXIDES
min MINERALOGY BY X-RAY DIFFRACTION AND
WHOLE ROCK CHEMISTRY
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY DATED
MAY 19, 2015 WAS OBTAINED FROM WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND COMPARISON TO
AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG TOPOGRAPHY IS FROM
SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS INSTALLED PRIOR TO
2015 TAKEN FROM S&ME (2010) AND QUANTEX (2008).
NOTE.
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
rra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 6-3
DUKE
GRAPHIC SCALE ENERGY
300 0 300 600 PROGRESS
IN FEET
MAYO STEAM ELECTRIC PLANT
HORIZONTAL: 1"=300'
10660 BOSTON RD
30 0 30 60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL:1"=30' FIGURE 6-3
NOTE: 10:1 VERTICAL EXAGGERATION GEOLOGIC CROSS SECTION C-Cl

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540
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520
510
500
490
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480
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460
450
440
430
420
410
NOI
MW-05BR(42.0-44.5)
SHARP CONTACT BETWEEN FELSIC AND MARC GNEISS
MW-05BR (44.5-47.0)
MARC BEDROCK WITH MYLONITIC TEXTURE AND CALCITE STRINGERS
LEGEND
COAL ASH
TRANSITION ZONE
BEDROCK
REGOLITH
SOIL/FILL
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
z1U FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
4.4 x 10-4 K Value
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BLE)
SAMPLE DESCRIPTIONS
metals
TOC
IP
HC
SPLP
Kd
HFO
min
SOURCES:
TOTAL METALS
TOTAL ORGANIC CARBON
GRAIN SIZE, MOISTURE CONTEXT
HYDRAULIC CONDUCTIVITY, SPECIFIC GRAVITY
SYNTHETIC PRECIPITATION LEACHING
PROCEDURE
SORPTION COEFFICIENTS
HYDROUS FERRIC OXIDES
MINERALOGY BY X-RAY DIFFRACTION AND
WHOLE ROCK CHEMISTRY
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY DATED
MAY 19, 2015 WAS OBTAINED FROM WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND COMPARISON TO
AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG TOPOGRAPHY IS FROM
SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS INSTALLED PRIOR TO
2015 TAKEN FROM S&ME (2010) AND QUANTEX (2008).
NOTE.
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
Wni(erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 6-4
DUKE
GRAPHIC SCALE
ENERGY
300 0 300 600
PROGRESS
IN FEET
MAYO STEAM ELECTRIC PLANT
HORIZONTAL: 1"=300'
10660 BOSTON RD
30 0 30 60
ROXBORO, NORTH CAROLINA
IN FEET FIGURE 6-4
VERTICAL:1"=30' GEOLOGIC CROSS SECTION A -A'
NOTE: 10:1 VERTICAL EXAGGERATION
WITH PHOTOGRAPHS

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340
330
321
Zi
SECTION B-B'
FACING NORTHWEST
MW-16BR(47.0-50.0)
CROSSING FRACTURES IN GRANITIC GNEISS
MW-16BR (54.0-55.0)
BLACK FINE GRAINED PHYLLI I E PIECES
ABOVE DARK GRAY SILTY MATRIX
�0—
.i
f
r
k
i
ABMW-02BR (117.0-120.0)
GRANITIC GNEISS TO 119.3' BGS,
SHARP CONTACT WITH DARK GRAY PHYLLITE
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
COAL ASH
TRANSITION ZONE
BEDROCK
REGOLITH
--¢
SOIL/FILL
0
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
4.4 x 10-4
K Value
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BLE)
SAMPLE DESCRIPTIONS
metals TOTAL METALS
TOC TOTAL ORGANIC CARBON
IP GRAIN SIZE, MOISTURE CONTEXT
HC HYDRAULIC CONDUCTIVITY, SPECIFIC GRAVITY
SPLP SYNTHETIC PRECIPITATION LEACHING
PROCEDURE
Kd SORPTION COEFFICIENTS
HFO HYDROUS FERRIC OXIDES
min MINERALOGY BY X-RAY DIFFRACTION AND
WHOLE ROCK CHEMISTRY
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY DATED
MAY 19, 2015 WAS OBTAINED FROM WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND COMPARISON TO
AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG TOPOGRAPHY IS FROM
SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS INSTALLED PRIOR TO
2015 TAKEN FROM S&ME (2010) AND QUANTEX (2008).
NOTE.
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 6-5
DUKE
ENERGY
600 PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 6-5
GEOLOGIC CROSS SECTION B-B'
WITH PHOTOGRAPHS

MW-13BR (47.0-57.0) SAPROLITE GRADING INTO PWR
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380 -
370 -
360
ABMW-02BR (102.0-105.0)
GRANITIC GNEISS WITH SHARP CONTACT INTO HORNBLENDE GNEISS
MW-07BR (57.0-67.0)
GREENSCHIST FACIES ROCK TO 65.7' BGS
SHARPE CONTACT WITH GRANITIC GNEISS
I I I I I I I I I I I I I I I I I I I 1 I I I I I I I I C
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550
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- 530
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- 510
- 500
- 490
- 470
- 460 0�
- 450 0
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440
- 430
- 420
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SATURATED SAPROLITE BELOW ASH
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
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\Station
(feet)
ABMW-02BR (117.0-120.0)
GRANITIC GNEISS TO 119.3' BGS,
SHARP CONTACT WITH DARK GRAY PHYLLITE
MW-08S/ 08D (26.5-36.5)
SAPROLITE INTO TRANSITION ZONE j
!� � � %" y�y°{�. �.`�"f � � `,F, rf� r� a � ,.tea r � L '�„ _ •; fe �'^.
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i 1 '.,:.
I
MW-08BR (76.5-86.5)
HARD, FRESH META-ARGILLITE OR METAVOLCANIC BEDROCK
WITH PHYLLITE ON FOLIATION BREAKS
- 410
f
- 380 I 4..
- 370
360
� �����
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
CD
CD
CD
CD
CD
CD
CD
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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co
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co
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EAST
SECTION C-C'
FACING NORTH
A -
MW-09BR(34.0-36.0) LEGEND
SAPROLITIC SCHIST
COAL ASH
TRANSITION ZONE
BEDROCK
REGOLITH
SOIL/FILL
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
500
SURFICIAL WATER LEVEL
4
TRANSITION ZONE WATER LEVEL
480
W
BEDROCK WATER LEVEL
LU
z:
0
�U FRACTURED/OXIDIZED ZONE
-j
c�
OBSERVED IN ROCK CORE
07
(D 0
w
4.4 x 10-4 K Value
Z
J
BORING SYMBOLS
U
H
Q
SOIL SAMPLE
2
WITH VERTICAL
400
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
390
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
380
(SOURCE: BLE)
370
360
SAMPLE DESCRIPTIONS
metals TOTAL METALS
TOC TOTAL ORGANIC CARBON
IP GRAIN SIZE, MOISTURE CONTEXT
HC HYDRAULIC CONDUCTIVITY, SPECIFIC GRAVITY
SPLP SYNTHETIC PRECIPITATION LEACHING
PROCEDURE
Kd SORPTION COEFFICIENTS
HFO HYDROUS FERRIC OXIDES
min MINERALOGY BY X-RAY DIFFRACTION AND
WHOLE ROCK CHEMISTRY
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY DATED
MAY 19, 2015 WAS OBTAINED FROM WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND COMPARISON TO
AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG TOPOGRAPHY IS FROM
SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS INSTALLED PRIOR TO
2015 TAKEN FROM S&ME (2010) AND QUANTEX (2008).
NOTE.
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
Icip
WnTerra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 6-6
DUKE
GRAPHIC SCALE ENERGY
300 0 300 600 � p ®� p C
IN FEET
HORIZONTAL: 1"=300' MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
30 0 30 60 ROXBORO, NORTH CAROLINA
IN FEET FIGURE 6-6
VERTICAL:1"=30' GEOLOGIC CROSS SECTION C-C'
NOTE: 10:1 VERTICAL EXAGGERATION
WITH PHOTOGRAPHS

N
di m� A Zh Maro G��EK _ VIRGINIA
F ' - MW-15BR NORTH CAROLINA
J
�
CW-04
CW-03 j6,
- -
PA
CZfg MW-05BR MW-0� SR 501
5-01 CW-02
\ s CW-02D MW-08S -
S-02' MW-08D
9
qt h � CW-08 1111W�0813R MW-08BR
M' W�U7D °
ACTIVE Mr 7BR
ASH BASIN (� �4,
MW-04 tip
MW-136R
�k. JMW-naRR
` ABMW-01 } '*
• ABMW-02
�' • `` ABMW-02BR ABMW-03S CW-01D
►- `�;� ABMW-04
ABMW-04D
•
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JL
MW-10BR _ ..
r • -
♦ ♦ BG-02 _
r
CZfg
P
MW-11 BR' •
CzfV
. J nNII
•,
`♦
MW-12S
I/ MW-12D —
•• ♦ I , `•, J4•♦ �•
cn J � I ♦
LEGEND
NORTH CAROLINA GEOLOGIC UNITS'
CZfg - FELSIC MICA GNEISS (CHARLOTTETERRANE)
CZfv - FELSIC I MARC METAVOLCANIC ROCK (CAROLINA TERRANE)
VIRGINIA GEOLOGIC UNITS2
Zh - PROTEROZOIC METAVOLCANIC SCHIST
di - PROTEROZOIC QUARTZ DIORITE
MONITORING WELL
TOE DRAIN
ACTIVE ASH BASIN BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE
STATE BOUNDARY
> STREAM
NOTES:
' NORTH CAROLINA GEOLOGIC BOUNDARIES MODIFED TO CORRESPOND WITH
SYNTERRA FIELD OBSERVATIONS. MAP BASED ON GEOLOGIC SHAPEFILES OBTAINED
FROM THE USGS. USGS OPEN -FILE REPORT 2005-1323, PRELIMINARY INTEGRATED
GEOLOGIC MAP DATABASE FOR THE UNITED STATES: ALABAMA, FLORIDA, GEORGIA,
MISSISSIPPI, NORTH CAROLINAAND SOUTH CAROLINA, DATED 2007.
(https://pubs.usgs.gov/of/2005/1323/)
2 VIRGINIA GEOLOGIC BOUNDARIES WERE NOT MODIFIED, AND ARE SHOWN FOR
REFERENCE. GEOLOGIC FEATURE CLASSES OBTAINED FROM THE USGS. OPEN -FILE
REPORT 2005-1325. PRELIMINARY INTEGRATED GEOLOGIC MAP DATABASE FOR THE
UNITED STATES: DELAWARE, MARYLAND, NEW YORK, PENNSYLVANIA, AND VIRGINIA.
(http://pubs.usgs.gov/of/2005/1325/)
] SHADED RELIEF MAP BASED ON LIDAR DEM 20 DATA FROM NORTH CAROLINA FLOOD
RISK INFORMATION SYSTEM. ACCESSED ON JANUARY 2, 2015.
4 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http:llservices.nconemap.gov/)
5 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
500 0 500 1 000 1 500 2000 2 500
IN FEET
DUKEv
C
�' ENERGY
synTerra
PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT a
c
6REENVILLE, SC 29601 10660 BOSTON RD
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com a
FIGURE 6-7
GENERALIZED GEOLOGIC MAP

//,
or
- 000-.
bfjlLm
IsO
s r /a o
►�
SR•1501
` � y ACTIVE
ASH BASIN
Z
. `' -GNP
1- . 1981 �.
�.NDFILL
..�
if/1 + ■ r _ AA , /
dw
0 r
L - # i •
Cho
400
Y ° • 'jolp
LEGEND
O WATER SUPPLY WELD
■ DUKE ENERGY PRODUCTION WELL'
MONITORING WELL
FRACTURE TRACE
ASH BASIN BOUNDARY
L ! ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
NOTES:
DRINKING WATER WELLAND RECEPTOR STUDY (APPENDIX B).
SHADED RELIEF MAP BASED ON LIDAR DEM 20 DATA FROM NORTH CAROLINA FLOOD a
RISK INFORMATION SYSTEM ACCESSED ON JANUARY 2, 2015.
a PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE ~'
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE w
600 0 600 1,200 1,800 2,400 3,000
LL
(IN FEET) LL
4nDUKE
141P0
_ ENERGY
syn
Terra PROGRESS
a
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD m
864 421-9999 ROXBORO, NC 27574 m
FIGURE 6-8
FRACTURE TRACE ANALYSIS

4Lj
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HAD COUNTY _ '� ., 1 • i •'_ w f +
HALIFAX COUNTY NSTATE LINE (APPaox MATE)A _ t► `ti'r,ate• t ...M�. #A 1
` N> ►� PERSON COUNTY - JI
4 1F r PERSON COUNTY �I y a -� ,. • � r"�
.•a ,�.,�.! y♦`• - .. t r fit' y'•ti•tr 't_,^,= MW-15BR '� 1 ti .�.h ; �� 4• J
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427.70 .
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vor BRANCH -v.
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501.94 S 0104 375CW-.29
400_+ �\ MA
1 i.•t� .' [.4jc
,�• , v �� r'I ` 1�� , d' t_ P2 P2A 44.7 MW 3 D
s 'r _ # f % f t _ `♦' 377.32 �� 375.29 '1
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le
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i +1
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�p !432.54 }
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LEGEND
Mw o6BR
ASSESSMENT WELL WELL
407.15
ELEVATION IN FEET (msl.)
BG 02
BACKGROUND COMPLIANCE WELL
511.16
ELEVATION IN FEET (msl.)
l COMPLIANCE WELL
4 0.81
EELOEVATIONDIN FEET (msIENT
MW 3
MONITORING WELL
377.32
ELEVATION IN FEET (msl.)
WATER LEVEL CONTOUR IN FEET (msl.)
- -
INFERRED WATER LEVEL CONTOUR (msl.)
f
GROUNDWATER FLOW DIRECTION
DUKE ENERG PROGRESS
❑❑❑ COMPLIANCE BOUNDAR
WASTE BOUNDAR
PARCEL LINE (APPROXIMATE)
SOURCES:
AERIAL PHOTOGRAPH OF PERSON COUNT !
NORTH CAROLINA OBTAINED FROM THE NRCS
GEOSPATIAL DATA GATEWA_ AT
http://datagateway. nres. usda.gov/
❑❑ ❑❑❑r AERIAL PHOTOGRAPH WAS OBTAINED FROM WSP
FLOWN ON APRIL i
DRAWING HAS BEEN SET WITH A PRO ECTION OF
NORTH CAROLINA STATE PLANE COORDINATE S STEM
FIPS __-_ (NAD __)_
WATER LEVELS:
1.) WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015
2.) NEW WELLS WERE SURVEYED BY McKIM& CREED. THE HORIZONTAL DATUM IS SET TO NAD83
AND THE VERTICAL DATUM IS SET NGVD88.
3.) COMPLIANCE MONITORING WELL LOCATIONS AND WASTE BOUNDARYPROVIDED BU DUKE
ENERGY PROGRESS
4.) ADDITIONAL MONITORING WELL AND PIEZOMETER LOCATIONS WERE BASED ON DATA
PROVIDED BY PROGRESS ENERGY.
GRAPHIC SCALE
400 0 100 400 800
(IN FEET)
s n erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: JOHN CHASTAIN DATE: 08/27/2015
CHECKED BY: JERRY WYLIE DATE: 08/27/2015
PROJECT MANAGER: KATHY WEBB
LAYOUT NAME: FIG 6-9 (WL MAP)
DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 6-9
WATER LEVEL MAP
JUNE 2015
3
a
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w
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a
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NORTHWEST
RGO
ASH
AREA OF CONCENTRATIONS IN
GROUNDWATER ABOVE 2L & IMAC
LEGEND
INFERRED OR MEASURED APPROXIMATE WATER
TABLE
ACTIVE ASH BASIN
(SOURCE)
ASH PORE WATER
Al
synTerra
K
REGOQTH
t•Li�i�Y�L1��
ASH BASIN DAM
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.synterracorp.com
DRAWN BY: JOHN CHASTAIN DATE: 08/17/2015
PROJECT MANAGER: JERRY WYLIE
LAY�OUo. G 6n10 nCONEPToUAL LSECTIONo.,,�.e« �mc�anc i
SOUTHEAST
I
DX CULVERT CRUTCHFIELD BF2A�NCH
NDER ROAD II 'T�P9f
1�_
FIGURE 6-10
CROSS-SECTION SITE CONCEPTUAL MODEL
DUKE ENERGY PROGRESS
MAYO STEAM ELECTRIC PLANT
ROXBORO, NORTH CAROLINA

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MW-14BR 0.75'-1.0': Sb <1.1 / As 1.4 / Ba 81.8 / B 13.6 j / Cr 41.9 / Co 12.4 / Fe 18600 / Mn 527 / TI <1.1 / V 35.1
MW-14BR: pH 6.7 / Sb <1 / As <1 / Ba 30 / B <50 / Cr(VI) NS / Co 1.41 / Fe 907 / Mn 544 / TI <0.2 / TDS 190 / V 1.29 13.0'-13.75': Sb <1.1 / As 1.1 / Ba 479 / B 26.4 j / Cr 68.3 / Co 22.2 / Fe 35500 / Mn 3200 / TI 0.97 j / V 46.2
ABMW-03/ 03S 1
A ABMW-03: pH 6.63 / Sb <1 / As 193 / Ba 200 / B 1940 / Cr(VI) <0.005 / Co <1 / Fe 3890 / Mn 451 / TI 0.289 / TDS 350 / V 0.68 A
550 ABMW-03S: pH 5.21 / Sb <1 / As 1.04 / Ba 25 / B 1100 / C00 <0.005 / Co 3.98 / Fe 2630 / Mn 478 / TI <0.2 / TDS 110 / V <0.3 m 550
CW-05 51'-53': Sb<6.8/As<6.8/Ba56.1/B<17/Cr1.3j/Co6.6j/Fe16900/Mn319/TI<6.8/V28.8 C)
540 CW-05: pH 6.6 / Sb NS / As NS / Ba NS / B NS / Cr(VI) NS / Co NS / Fe NS / Mn NS / TI NS / TDS NS / V NS PLANT 540
530 MW-05BR 0 530
520 MW-05BR: pH 7.1 / Sb <1 / As <1 / Ba 31 / B <50 / Cr(VI) NS / Co <1 / Fe 4240 / Mn 1740 / TI <0.2 / TDS 380 / V <0.3
m 520
510 - 510
500 - - - - - - - - - 500
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- --- - -- ---- ---- - ---- -- - --
450 - --- --- --- 4.44x10 = ---- --- --- --- --- �� --- --- _--_ _--_ - 450
- --- - -- ---- ---- --- --- -- -
--- __ --- O 1.61x10 --- --- ---_ _- 440
--- --- ---- ---- ---
--- O D D D --- ---
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- --- --- -- ---- --- --- --- ---- ---- --
430
--- --- ---- ---- --- --- --- --- -- -- --- --- --- --- --- --- --- ----__
--- ---- __ ---- ---- --- --- --- --- ___
420 - --- --- --- ---- _--_ --- --- --- --- --- --- --- --- --- --- --- - O O O O O --- --- --- --- --- --- ---- ---- _- 420
- - - - - - - - - - - - - - - - -- --
410 - --- --- ---- ---- --- --- --- --- --- --- ---- 1--- - --- --- --- --- --- ---- - 410
0 O 0 o O 0 0 0 0 o O 0 O O O O O O O O O O O O O O O O O O o 0 0 0 0 0 0 0 O o o O O 0 O o o O O o O O O O o 0 0 O O O O O
0 O 0 0 O 0 0 0 0 0 O 0 O O O O O 0 O O O O O O O O O O O O o 0 0 0 0 0 0 0 0 o O O O 0 O O O O O 0 0 0 0 0 0 0 0 0 0 o O o
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O N co It Lr') Co I- co m O - N 10 It LC) Cfl � 00 O O - N M � Ln (o I- m M o - N M ,T LO Co I- CO O 0 - N M � Ln (9 r­ W M O
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NORTHWEST Station SOUTHEAST
(feet)
SECTION A -A'
FACING NORTHEAST
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
COAL ASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
^� FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
4.4 x 10-4 K Value
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BLE)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY
DATED MAY 19, 2015 WAS OBTAINED FROM WSP OF
CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND
COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
iT(erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 8-1
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 8-1
GEOLOGIC CROSS SECTION A -A'
WITH ANALYTICAL RESULTS

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O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
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SOUTHWEST
Station
(feet)
SB-07 SECTION B-B'
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6 FACING NORTHWEST
4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
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off
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In
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470
CW-2: pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 / TDS 370 / V 5.88
CW-2D: pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460
460 N
50
MW-16S/ 16D/ 16BR
MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
4 0
Q
MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
of
MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
43
w
1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J
23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4
420
0
33'-35':Sb<7.5/As<7.5/Ba131/616.8j/Cr9.2/Co12/Fe19100/Mn1630/A<7.5/V16.3
Q
54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87
410
�
400
0 400
J
wA390
390
w
380
Q 380
01
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-
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6.90 x 10 360
U
---
350
340
W
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-_
4.68x10"
Z
---
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---
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-- 330
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- - -
320
- - - -
310
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---
---- ---- ---
300
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O O O
O O O
O O
O O
O O O O O O O O O O O
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+ + +
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+ + + + + + + + + + +
N CO � LO Co r-- 00 M O
f� ti
r1- 00
00 00 Co 00 00 00 00 00 00 O O
NORTHEAST
SECTION B-B'
FACING NORTHWEST
C J
0
w�
COAL ASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
^� FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
4.4 x 10-4 K Value
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC WELL SCREEN WITH
CONDUCTIVITY HYDRAULIC CONDUCTIVITY
OF UNDISTURBED IN CENTIMETERS PER SECOND
SAMPLE (SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BLE)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY
DATED MAY 19, 2015 WAS OBTAINED FROM WSP OF
CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND
COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON JUNE 17, 2015.
A
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 8-2
f%,. D U K E
GRAPHIC SCALE vqc� E N E RGY
300 0 300 600 PROGRESS
IN FEET
HORIZONTAL: 1"=300' MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
30 0 30 60 ROXBORO, NORTH CAROLINA
IN FEET FIGURE 8-2
VERTICAL:1"=30' GEOLOGIC CROSS SECTION B-B'
NOTE: 10:1 VERTICAL EXAGGERATION
WITH ANALYTICAL RESULTS

MW-13BR: pH7.2/Sb<I/As<1/Ba 40/B<50/Cr(VI) 0.005 / Co 1.19 / Fe 1130/ Mn 474/ TI<0.2/ TDS 370/ V 0.381
0'2%Sb<6.5/As<6.5/Ba 72.9 / B <16.3 / Cr 6.1/Co<6.5/Fe 196M Mn 82.8 /TI<6.5/V 32.4
52'-54':Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/C.6.6/Fe 10400/Mn 789 /TI<5.1/V 13.1
ABMW-02: pH7.8/Sb<1/As 1020/Ba 173/B 9200/Cr(VI)0.017/Co<I/Fe 356/ Mn 1110/ TI <0.2/ TD5450/ V 3.53
ABMW-02BR: pH7.2/5b<S/As<1/Ba 159/B<50/Cr(VI)0.007/Co<I/Fe 107/Mn 149/TI<0.2/ TDS 370/ V 0.873
45'-45.5':5b<6/As<6/Ba 92.2 / B <15 / Cr 8 / Co 6 1 / Fe 18300/ Mn 579/ TI<6/ V 30.3
57.5'-58': 5b<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
ABMW-03: pH6.63/5b<1/As 193/Ba 2W/B 1940/Cr(VI)<OAW/Co<1/Fe 3890/ Mn 451/ TI 0.289/ TD5350/ V 0.68
C< ABMW-01 ABMW-035: pH5.21/5b<1/As1.04/Ba25/BIIOO/Cr(VI)<0.005/Co3.98/Fe2630/Mn478/TI<0.2/TD5110/V<0.3 CW-01
550 0 h ABMW-01: pH7.6/Sb38/As518/Ba925/B4560/Cr(VI)NS/Co6.09/Fe1370/Mn2280/TI2.47/TDS540/V 314 51'-53':Sb<6.8/As<6.8/Ba56.1/B<17/Cr1.3j/Cob.6j/Fe16900/Mn319/TI<6.8/V28.8 CW-01: CW-01:pH5.5/5b<3/As<S/Ba<5/B<50/CrIVIINS/Co<1/Fe31/Mn6/TI <0.2/TD5150/V0.543
Z 1'-1.5':5b<8.7/As16.6/Ba15D/B27.4/Cr25/Co7.6j/Fe2240/Mn18.4/TI<8.7/V39.3 CW-01D: pH6.8/Sb<1/As<1/Ba<5/B<50/Cr(VI)NS/Co<1/Fe<10/Mn<5/TI<0.2/TD5200/V1.09
540 OF= 11.5-12': Sb<7.8/As26.2/Ba152/B27.4/Cr26.9/Co8.3/Fe2710/Mn31.3/TI<7.8/V46.2
� W 13'-13.5%Sb<6.2/As<6.2/Sa 53.8 / 8 <15.5 / Cr 3.7 / Co <6.2 / Fe 8770/ Mn 92.2/ TI<6.2/V 11.9 Q
530 m O MW-096R
J
MW-09BR: pH6.3/Sb<llAsri/Ba 301B<50/Cr(VI)NS/Co<1/Fe 3000/Mn 809/ TI<0.2 / TDS 220/ V 4.17
moon
,1/111111111111111111111111►.r���:11111111111111111111111111111111111111111111111111111111111111111_�������:.�
�
IIII/lllllllllllllllllllllllllll�
IIIIIIMIIIIIIIIIIII
!�
1/11111111�111
1��111111111111111111111111��1111����!IIII
11
'-'
1lI1�ILlI
w�.i,�
:�:omm
:�:�SppC
e�lS_�
1
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1�1
11
1�1�1�1�1�1�1�1�
1111ill1�111■1■1■1.111
141'1�I1Ia
11�11i111111_1111-=1111-a
111as11111�s11■s
11■11�a1.aV1a.
1�■!1■11.•1.•a1.Is11�I•1a�I41s:
11.11.•1.ap1I�s,
11al
'
■s1■4�■1■a�aa�a�1aa1�a1
!I-1I!I1I1I1I�1IJ'1II11I1I1I1�1IG11I1�1r111�
On
11
-
da7AM-
�-mIr-C-aaG
��
I•:.ICPo1r1�
AAII�I1
--mmm
111106=1011
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MINIMUM
11111
1$11111111111$11111$11111111111111111111111111111
Fill
11111111
1
1911111
111
F,
1�1�1I>�sa■az
1�$a1a11111a1a1111$11g1g11
�
.,111111111111a1a11111a1a11111a1a11111a1a$1111a1a11111a1a11111a1a111111
.,
aa
aa
aa
.,Illlllllllllllllllllllllllllllllllglllllgllllllllllllll
Illllllllllllllllglllllllllllglllllglllllllllllgllllllll
.,
MW-07D: pH6.4/5b<1/As<1/Ba24/B<50/Cr(VI)NS/Co<1/Fe69/Mn188/TI<0.2/TD539D/V 0.798
MW-07ER: pH 7.4/5b<1/As <1/Ba 140/B<50/CrIVIINS/Co<I/ Fe 339/ Mn 263/ TI<0.2/ TDS 270/V<0.3 CF
550 P-2%Sb<5.1/As<5.1/Ba21.5/B<12.9/Cr4.1/Co<5.1/ Fe 7320/ Mn 27.7/ TI<5.1/ V 12.8 550
540 540
MW-08S/ 08D/ 08BR
530 p MW-086R: pH6.56/Sb<3/As<I/Ba 66/B<50/Cr(V0 N5/Coq/Fe 2200/Mn 2680/TI <0.2/TDS 550/V<0.3
O 0.75'-1.25':Sb<3.2/As<3.2/Ba147/B<63.4/Cr62.2/Co21.3/Fe24700/Mn1230/TI<3.2/V50.6
520 of 25.5'-26':Sb<2.7/As<2.7/Ba193/B33j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb<2.7 As<2.7 Ba130 B<53.1 Cr67.1 Co7.4 Fe11400 Mn875/TI<2.7/V25.2
11/111����111111111111111111111111!!11111
F F
„
,.
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C111
111111111111111111�11111�1111
,.,
.,
.,
111111111111111
11111�1'lll.,
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Illll66111,.,
.
Illllllllli�l
. , ; ,
iaiasis�C��aias$4�4C��a�a
-
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.
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:F
�1111g11111g11111
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.F .,
- - - - - - - - - - - - - - - - - - - -
I
SECTION C-C'
FACING NORTH
LEGEND
_
COAL ASH
_
TRANSITION ZONE
BEDROCK
REGOLITH
SOIL/FILL
SAPROLITE
ALLUVIUM
WATER LEVEL (JUNE 17, 2015)
•
SURFICIAL WATER LEVEL
• TRANSITION ZONE WATER LEVEL
• BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
m�
OBSERVED IN ROCK CORE
UJ w
4.4 x 10-0 K Value
ABMW-0219R: WATER ANALYTICAL RESULTS IN p9/1-
45'45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WITH VERTICAL
HYDRAULIC
WELL SCREEN WITH
CONDUCTIVITY
HYDRAULIC CONDUCTIVITY
OF UNDISTURBED
IN CENTIMETERS PER SECOND
SAMPLE
(SOURCE: SYNTERRA SLUG TEST)
(SOURCE: BILE)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY BOUNDARY
DATED MAY 19, 2015 WAS OBTAINED FROM WSP OF
CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY AND
COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE,
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BV SYNTERRA ON DUNE 17, 2015.
VIP
syn
Terra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 8-3
'DUKE
GRAPHIC SCALE <c ENERGY
300 0 300 600
IN FEET
HORIZONTAL: 1"=300'
30 0 30 60
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 8-3
GEOLOGIC CROSS SECTION C-C'
WITH ANALYTICAL RESULTS

100%
90%
80% i Mullite
70% ■ Kaolinite
60% ■ Illite
50°� ■ I (.7)/ S
c
a
■ Dolomite
a 40%
■ Chlorite
ao 30%
°J ■Amphibole
20%
■ Feldspar
10% � ■Quartz
0%
P
Sample Location
148 RIVER STREET, SUITE 220 FIGURE 8-4
GREENVILLE, SOUTH CAROLINA 29601 DOMINANT MINERALOGY OF SOIL
PHONE [phone]
www.synterracorp.com
DRAWN BY: E. BLACK DATE: AUGUST 2015
synTerra PROJECT MANAGER: J. WVLIE MAYO STEAM ELECTRIC PLANT
LAYOUT:
[P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assessment Plan\1.11 CSA Reporting\Figures\ ROXBORO, NORTH CAROLINA 27574

100%
90%
80%
70%
60%
c
u 50%
v
a
ao 40%
30%
20%
10%
0%
<c\ fro\
I� titi ��04 ti�
Sample Location
410 148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.s nterracor .com
DRAWN BY: E. BLACK DATE: AUGUST 2015
synTerra PROJECT MANAGER J. WYLIE
LAYOUT:
P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW
Assessment PIan\1.11 CSA Reporting\Figures\
L01
V205
Ti02
SrO
Si02
■ P205
Na20
■ MnO
■ Mg0
K20
■ Fe203
■ Cr203
■ CaO
■ BaO
■ A1203
FIGURE 8-5
DOMINANT METAL OXIDE COMPOSITION OF SOIL
MAYO STEAM ELECTRIC PLANT
10660 BOSTON ROAD
ROXBORO, NORTH CAROLINA 27574

100%
90%
80%
70%
60%
a 50%
u
L
a 40%
4,
30%
3 20%
10%
0%
R ly �p�\D `yh�Q`
Sample Location
410 148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.s nter.com racor
DRAWN BY: E. BLACK DATE: AUGUST 2015
synTerra PROJECT MANAGER J. WYLIE
LAYOUT:
P:\Duke Energy Progress. 1 026\1 05. Mayo Ash Basin GW
Assessment Plan\1.11 CSA Reporting\Figures\
L01
V205
Ti02
■ SrO
■ Si02
■ P205
Na20
■ MnO
■ Mg0
■ K20
■ Fe203
■ Cr203
• CaO
■ BaO
■ A1203
FIGURE 8-6
DOMINANT METAL OXIDE COMPOSITION
OF ROCK CORE
MAYO STEAM ELECTRIC PLANT
10660 BOSTON ROAD
ROXBORO, NORTH CAROLINA 27574

100%
90%
80%
Zeolite
70% Siderite
60% Muscovite
50% ■ Lepidocrocite
v
v 40% ■ Kaolinite
a
" r Illite
a_o 30%
w ■ Gibbsite
3 20%
■ Dolomite
10% ■ Chlorite
0% ■ Calcite
(11\ fin\ Lp\ c\ gyp\ gyp\ hp\ c\ fin\ �c\
■ Biotite
00.
Qil
N11
■ #REF!
■ Feldspar
Q ■ Quartz
Sample Location
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.synterracorp.com
DRAWN BY: E. BLACK DATE: AUGUST 2015
synTerra PROJECT MANAGER J. WYLIE
LAYOUT:
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW
Assessment Plan\1.11 CSA Reporting\Figures\
FIGURE 8-7
DOMINANT MINERALOGY OF CORE
MAYO STEAM ELECTRIC PLANT
10660 BOSTON ROAD
ROXBORO, NORTH CAROLINA 27574

N
MW-03BR'
START DEPTH
END DEPTH
Co
Fe
Mn
0.8
1.2
5.4
8480
327
14.75
15
4.37750468
17
18
3.6
-
459
SB-012
START DEPTH
END DEPTH I As
Co
Fe
1
2 1.2 j
3.7
1240
13.5
14.5 1.2 j
8.9
849067481.4
ABMW-015
START DEPTH
I END DEPTH
I Fe
13
1 13.5
18770
ABMW-02BR4
START DEPTH
END DEPTH
I Al
I Ba
I Co
I Cu
I Fe
I Mn
I V
45
45.5
192.216
j
172.711830015791
-
57.5
58
1202001
-
37.4
81.7
43400
782
84.9
SB-022
START DEPTH
END DEPTH
Al
As
Co
Fe
Mn
Se
V
0.5
2
10200
1.9
6.4
18300
365
1.3 j
44.8
11.0
12.5
1.5
-
10300'
I0.85 j
-
SB-032
START DEPTH
END DEPTH
Al
As
Co
Fe
Mn
17
18.5
11800
1.6
10.64
5.2
18100
-
5
6
j
14.918070
348
�ru]Mi
MW-11 BR3
START DEPTH
END DEPTH
Al
Ba
Co
Cu
Fe Hg Mn
V
0
2
19700
-
6.4 j
59.1
52900 0.13 -
208
30
32
15000
17940
.9
363
44000 - 212191
N �I
g 40Myy' SR•1328
4
l Dr �q 4p
J
MWA 5BR4
START DEPTH
END DEPTH
Al
Co
Fe
0.5
1
1844013.9
jj
15600
1981
MWA 6BR3
START DEPTH END DEPTH Al E
1 2 9
23 24
33 35 9030 1
54.5 55.5 24500 2
fi�
SB-074
START DEPTH
END DEPTH Al Co Fe
1
2 9000 5.9 9460
�226
4.5
7.5 - 6040
MW-08BR'
START DEPTH
END DEPTH
Al Ba Co
Feg1.7
1' 0.75
1.25
14500 147 21.3
24700
25.5
26
23700 193 32.9
3130030.5
31
8330 130 7.4
11400
LANDFILL--�--�-
ter+
MW-07BR3
START DEPTH END DEPTH
7�.
♦r 1 2
r.4
r`
SB-052
START DEPTH
END DEPTH As Co Fe
Mn Se
1
2 1.8 2.8 8280
406 1.9
2.3
3.3 1.1 - 6670
393 1.2
8
9 1 j - 5790
195 0.87 j
♦r SB-062
�.„ START DEPTH END DEPTH
.�. L .. 1 2
MW-10BR'
START DEPTH END DEPTH Al As Ba
0.75 1.0 1.4 -
13.0 13.75 18700 1.1 479
5Q'
LEGEND
MONITORING WELL
SOIL BORING
ACTIVE ASH BASIN
L - _ . -' ASH BASIN COMPLIANCE BOUNDARY
:7 DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- - - DITCH
STREAM
Analytical
Parameter
01-Industrial
Health EPA RSL
2015-06
m
02-Residential
Health EPA RSL
2015-06
m
03-Protection of
Groundwater
EPA RSL 2015-06
m
Aluminum (Al)
110000
7700
Arsenic(As)
3
0.68
0.29
Barium (Ba)
22000
1500
82
Cobalt(Co)
35
2.3
Copper (Cu)
4700
310
46
Iron (Fe)
82000
5500
Lead (Pb)
800
400
14
Manganese (Mn)
2600
180
Mercury(Hg)
4
0.94
0.1
Nickel (Ni)
2200
150
Selenium (Se)
580
39
0.26
Thallium(TI)
1.2
0.078
0.14
Vanadium (V)
580.
39
NOTES:
i CONCENTRATIONS SHOWN ARE FROM THE FEBRUARY 2015 SAMPLING EVENT.
2 CONCENTRATIONS SHOWN ARE FROM THE MARCH 2O15 SAMPLING EVENT.
oQ
3 CONCENTRATIONS SHOWN ARE FROM THE APRIL2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
5 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
sSITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
3 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE
NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http:11servioes.nconemap.gov1)
e PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (h0p:l/services.nconemap.gov0
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83Y2011).
Tj = INDICATES CONCENTRATION REPORTED BELOW PQL, BUT ABOVE MDLAND THEREFORE
CONCENTRATION IS ESTIMATED
7 j 46.2 GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000 „
(IN FEET) LL
SR•1507 �' DUKE
_ ENERGY
synTerra °
PROGRESS
g
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT r
L GREENVILLE, SC 29601 10660 BOSTON RD o
864421-9999 ROXBORO, NORTH CAROLINA27574 N
www.synterracorp.com m
FIGURE 8-8
SITE MAP WITH SOIL EXCEEDANCES

a S- 01
5-02
o S-02D
S-03
+IIF S-04
6-05
11-00, S-06
6 Z S-08
4 { x-
80% i � 80%
' 60% � � 60% �
40% 40%
1�
Q ff t 1
20% pr 77 20%
cp
t �4
O O O O
148 RIVER STREET, SUITE 220 FIGURE 9-1
GREENVILLE, SOUTH CAROLINA 29601 PIPER DIAGRAM — SEEPS AND SURFACE WATER
PHONE [phone]
www.s nterracor .com
DRAWN BY: J. GILMER DATE: JUNE 2015
synTerra[P:\Duke
PROJECT MANAGER J. wvuE MAYO STEAM ELECTRIC PLANT
LAYOUT:
Energy Progress.1026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assessment Plan\1.11 CSA ROXBORO, NORTH CAROLINA 27574
Reporting\Figures\Statistics\Piper Diagrams

ABMW-013
CONSTITUENT RESULT
As
518
B
4560
Ba
925
Co
6.09
Fe
Mn
1370
2280
Sb
38
TDS
540
TI
2.47
V
314
SRA 500 gQ
SR.1329
!A .. SR lh;.-' SK-13z8
�400 SQ'0"e SR.1 gt ` -
ABMW-023
CONSTITUENT
RESULT
As
1020
B
9200
Fe
356
Mn
1110
V
3.53
ABMW-033
CONSTITUENT
RESULT
As
193
1981 B
1940
LANDF Fe
3890
Mn
451
TI
0.289
l M
V
0.68
-Ar.' �.
s
ABMW-043
ISTITUENT
RESULT
As
499
B
4930
Co
1.49
Fe
940
Mn
641
TDS
520
V
2.84
NIP"
.r soA
r
f �4
_ 7 �.r.4.
♦ r
1
LEGEND
MONITORING WELL
0 ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
r. _. DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— - — - DITCH
STREAM
North Carolina 2LStandards
Constituent
Abbreviation
Upper Limit
Units
Lower Limit
Antimonys
Sb
1
µg/L
---
Arsenic
As
10
µg/L
---
Boron
B
700
µg/L
---
Chloride
CI
250
mg/L
---
Chromium
Cr
10
µg/L
---
Cobalt-'
Co
1
µg/L
---
Iron
Fe
300
µg/L
Manganese
Mn
50
µg/L
pH
pH
8.5
S.U.
6.5
Selenium
Se
20
µg/L
---
Sulfate
SO4
250
mg/L
---
Thalliums
TI
0.2
µg/L
---
Total Dissolved Solids
TDS
500
mg/L
Vanadium
V
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
Z CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
5NORTH CAROLINA 21- INTERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC)
6SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17. 2014. IT WAS OBTAINED FROM WSP.
7ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83/2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
SR•1507tip
synTerra
148 RIVER STREET, SUITE 220,
L GREENVILLE, SC 29601
864421-9999
www.synterracorp.com
w
4 DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
J1 CHECKED BY: J. MEADOWS DATE: 827/2015
PROJECT MANAGER: J. WYLIE
sow
FIGURE 10-1
w
SITE LAYOUT WITH 2L EXCEEDANCES
s� N� ASH PORE WATER WELLS

cn
w
A
♦ `i
l .
e MW-12S3
s
*7 �^ CONSTITUENT RESULT
Co 1.09
.' . �..—..—.. Mn 267
Ak
pH 5.7
. J V 0.403
h
J
SRA 500 gQ
SR.1329
!A .. SR lh;.-' SK-13z8
'4po SQ'028 SR.1 gt , -
s1,7so?
MW-03'
CONSTITUENT
RESULT
B
847
Mn
880
pH
5.7
ACTIVE
ASH BASIN
NIP"
MWA 6S3
CONSTITUENT I RESULT
Co 4.32
Fe 860
Mn 260
pH 6.0
V 0.303
ABMW-03S3
CONSTITUENT
RESULT
B
1100
Co
3.98
Fe
2630
Mn
EZI
pH
♦ , . ♦ , u1
r �
2jjSR-!i501
o=
sp
7sp
I
11~�
1
r-
L r•
,J
LEGEND
MONITORING WELL
Q ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
r: — �� DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
-—-— DITCH
STREAM
North Carolina 2L Standards
Constituent
Abbreviation
Upper Limit
Units
Lower Limit
Antimony5
Sb
1
µg/L
---
Arsenic
As
10
µg/L
---
Boron
B
700
µg/L
---
Chloride
CI
250
mg/L
---
Chromium
Cr
10
µg/L
Cobalts
Co
1
µg/L
Iron
Fe
300
µg/L
---
Manganese
Mn
50
µg/L
---
pH
pH
8.5
S.U.
6.5
Selenium
Se
20
µg/L
---
Sulfate
SO4
250
mg/1-1
---
Thalliums
TI
0.2
µg/L
---
Total Dissolved Solids
TDS
500
mg/L
---
Vanadium5
V
0.3
µg/L
---
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
Z CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
5NORTH CAROLINA 2L INTERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC)
6SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17. 2014. IT WAS OBTAINED FROM WSP.
7ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83I2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
141P
synTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864421-9999
www.synterracorp.com
4 DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
FIGURE 10-2
SITE LAYOUT WITH 2L EXCEEDANCES
SURFICIAL WELLS

MW-02'
CONSTITUENT
RESULT
Co
2.78
Fe
756
Mn
833
pH
5.8
V
1.68
� o
h �
J� Nt
SRA 500 gQ
SR.1329
'so?
lh;.-' SK-03z8 I
1
40
0
S4t'028 SR•1 gt , -
CW-034
CONSTITUENT
RESULT
V
1 1.41
MW-12D3
CONSTITUENT
RESULT
Co
1.37
Fe
326
Mn
683
pH
6.2
Sb
1.63
V
0.719
NIP"
MW-16D3
CONSTITUENT
RESULT
Mn
269
V
0.617
C W-024
CONSTITUENT
RESULT
B
804
Mn
393
pH
5.1
MW-07D3
CONSTITUENT
RESULT
Mn
1
88
6.4
* ,
5�
798 1 SR1so'
L0
o:
sp
�S
Oy
LEGEND
Q� MONITORING WELL
. ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— — — — DITCH
STREAM
North Carolina 2L Standards
Constituent
Abbreviation
Upper Limit
Units
Lower Limit
Antimonys
Sb
1
µg/L
---
Arsenic
As
10
µg/L
---
Boron
B
700
µg/L
---
Chloride
CI
250
mg/L
---
Chromium
Cr
10
µg/L
---
Cobalt-'
Co
1
µg/L
---
Iron
Fe
300
µg/L
I ---
Manganese
Mn
50
µg/L
---
pH
pH
8.5
S.U.
6.5
Selenium
Se
20
µg/L
---
Sulfate
SO4
250
mg/L
---
Thalliums
TI
0.2
µg/L
---
Total Dissolved Solids
TDS
500
mg/L
Vanadium-'
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
Z CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
5NORTH CAROLINA 2L INTERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC)
6SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
7ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83I2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
SR•1507tip
synTerra
148 RIVER STREET, SUITE 220,
L GREENVILLE, SC 29601
864421-9999
www.synterracorp.com
w
4 DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
FIGURE 10-3
SITE LAYOUT WITH 2L EXCEEDANCES
TRANSITION ZONE WELLS

07
3R• 1400
m0f
MW-13BR3
CONSTITUENT
RESULT
Co
1.19
Fe
1130
Mn
474
V
0.381
4-
ABMW-02BR3
CONSTITUENT
RESULT
Mn
149
V
0.873
BG-014
CONSTITUENT
RESULT
Fe
557
pH
5.6
V
4.94
MW-11 BR3
CONSTITUENT
RESULT
Mn
67
Sb
1.32
TI
0.32
V
2.6
SR•1328 S P...71
SR13Zg�
c9 40
J
CW-054
CONSTITUENT
RESULT
Fe
1060
Mn
785
MW-05BR'
CONSTITUENT
RESULT
Fe
4240
Mn
1740
ABMW-04BR3
CONSTITUENT
RESULT
Fe
1590
Mn
407
V
0.382
9
SR-1500 gQ
SR.1329
sl,7so?
CW-044
CONSTITUENT
RESULT
pH
5.9
V
1.02
MW-03BR'
CONSTITUENT
RESULT
Fe
648
Mn
731
TDS
660
V
0.781
MW-16BR3
CONSTITUENT
I RESULT
pH
8.7
V
2.79
�t
SR-1501- � e
W-10BR' `'VV-U t" .
CONSTITUENT RESULT • r1
ITUENT RESULT V 1.09
i =e 883 ♦ ♦'
An 894 +�
.ram
i
1.J
CW-02D4
CONSTITUENT
RESULT
Mn
81
pH
6.1
V
0.585
C W-064
CONSTITUENT
RESULT
Fe
2040
Mn
1450
TDS
560
LEGEND
MONITORING WELL
ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— - — - DITCH
STREAM
North Carolina 2L Standards
Constituent
Abbreviation
Upper Limit
Units
Lower Limit
Antimony
Sb
1
µg/L
---
Arsenic
As
10
µg/L
---
Boron
B
700
µg/L
---
Chloride
CI
250
mg/L
---
Chromium
Cr
10
µg/L
---
Cobalt-'
Co
1
µg/L
---
Iron
Fe
300
µg/L
---
Manganese
Mn
50
µg/L
---
pH
pH
8.5
S.U.
6.5
Selenium
Se
20
µg/L
---
Sulfate
SO4
250
mg/L
---
Thalliums
TI
0.2
µg/L
---
Total Dissolved Solids
TDS
500
mg/L
Vanadium
V
0.3
µ /-L
---
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
Z CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
NORTH CAROLINA 2L INTERIM MAXIMUM ALLOWABLE CONCENTRATION (IMAC)
6SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
7ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83I2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
SR•1507 40�ENERGY
DUKE
synTerra PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
L GREENVILLE, SC 29601 10660 BOSTON RD
864421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
w
FIGURE 10-4
SITE LAYOUT WITH 2L EXCEEDANCES
BEDROCK WELLS

N---------------� •�---------------------
A •
S-012
Flu
< 1 (<
<1 (21)
AEIMW-04'
�.,<1 (<1)
j
♦............. -.- r-..-1
A
1981W. LANDFILL s.
MAYO
LAKE
,
. ,-..
l .
LEGEND
1 N N NV h X
1 BOLD VALUESN N N
(1) N N IW hX
(1) BOLD VALUESN N N
N N N ITV N N
W N N N N N N
N
0 N
O N N N
N N N
N N N N N N
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N hhi nrN
N g
N
N
N
N
IW M N N Nn
hg
N
N
N N N
hit )hi npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g BK
w
N N
N
N NN
N
N N N N
N
N
Nni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
tip DUKE
ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnnawmw N N Ntrtp w
9 9
FIGURE 10-5
ISOCONCENTRATION MAP
ANTIMONY IN ASH PORE WATER WELLS

N---------------� ••------------
h
• �J
A / r • ?
�S-012
3.45(2.06)
p
-• - wcrnio �_s� d
A
ABMW-01a 10.
g� V' 518 (369) ABMW-02a
biik
1020(87a)-03'�97)
I
L.
♦................ r-.. -1
Lam.
MAYO
LAKE
,
iLEGEND
10 N N frYV h X
10 BOLD VALUESN N N
(10) N N RV X
(10) BOLD VALUESN N N
N hh N fW N N
W N N N N N N
N
L N
O N N N
N N N
N N N N N N
1.
ti r ♦'� /
J -
X
X
NOTES:
N
N N
N hhi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hh N N
N hhN h g
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g fX
w
N N
N
N NN
N N N N N
N
N
fdni i IVV
voh"
N
pi i pii vii ranii nuii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnmm~
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-6
ISOCONCENTRATION MAP
ARSENIC IN ASH PORE WATER WELLS

N---------------� ••----------
o ..
A • •J -
S-012.�-
�142(131) -�-'�-
S-022
ABMW-04
(449)
9r1
j
♦. — .. — .. — ..... — .. r_ .. —1
MAYO
LAKE
,
1•
A"�
`-1
1
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N IW h X
(700) BOLD VALUESN N N
N N N Kry N N
W N N N N N N
N
0 N
O N N N
N N N
N N N N N N
NOTES:
N
N N
N hhi nr N N g
N
N N
N Idi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hhN N
NNiiNhg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
Idni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN Xtip =
DUKE
a
ENERGY
s mTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnnawmw N N Ntrtp LL
9 9 a
FIGURE 10-7
ISOCONCENTRATION MAP
BARIUM IN ASH PORE WATER WELLS

N---------------� •�---------------------
A •
ABMW-01'
g� 4560 (4530)
goo
ABMW-02'
9200 (8100)
J
j
.. -..... -..... -.. r_..-1
A
MAYO
LAKE
,
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N RV h X
(700) BOLD VALUESN N N
N hh N Kry N N
N
0 N
O N N N
N N N
�... mz
N N N N N N
NOTES:
N
N N
N hhi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hhN N
NNiiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
hhni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X
DUKE
1�lp ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p W
9 9
FIGURE 10-8
ISOCONCENTRATION MAP
BORON IN ASH PORE WATER WELLS

N---------------� •a------------
h ,
• '• �J
a
L
♦. - .. - .. - ..... - ..
LEGEND
0.035 N NV m IW h X
0.035 BOLD VALUESN N N
-• ' c W.i "e ., T
N NV N N X
W N N N N N N
N
�- N N N
�._._ N N N
N N N N N N
I —
MAYO
LAKE
,
1•
_`Ils`
1 -
X
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N fdi nr N
N g
N
N
N
N N
NVMNgorN hJW c
ni nrX
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g hX
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i pii vii rrmii nuii ndii
WN X
DUKE
All ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-9
ISOCONCENTRATION MAP
CHROMIUM (VI) IN ASH PORE WATER WELLS

N---------------� •�---------------------
A •
S-01Z
n 8.05 Q.n)
AB M W-03'
j
♦. — ..... — ..... — . . r_ .. —1
J vrm.
1•
A"�
`-1
1
LEGEND
1 N N NV h X
1 BOLD VALUESN N N
(1) N N NV hX
(1) BOLD VALUESN N N
N N N NV N N
W N N N N N N
N
0 N
O N N N
N N N
N N N N N N
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N 9
p
N
N N
N hhi nrN
N 9
N
N
N
N
IW )N N N NN h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g Bx
w
N N
N
N NN
N
N N N N
N
N
Idni i IW
voh"
N
pi i 31i vii ranii nuii ndii
WN Xtip =
DUKE
a
ENERGY
s mTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnnawmw N N Ntrtp LL
9 9 a
FIGURE 10-10
ISOCONCENTRATION MAP
COBALT IN ASH PORE WATER WELLS

N---------------� •a------------
h
• �J
, a ,
slo1Z �J ,
• 22000 (15100)
ASH BASIN i
1981 � ♦W.
LANDFILL s.
ABMW-013 All I00"
1370 (483) ABMW-02' -356(172,
1
aoo
AB W 03�3'Ali Lou
,
Lam.
' MAYO
LAKE
j
.. —..... —..... —.. r_..-1
LEGEND
300 N N f+YV h X
300 BOLD VALUESN N N
(300) N N IW h X
(300) BOLD VALUESN N N
N N N IW N N
W N N N N N N
N
0 N
O N N N
N N N
N N N N N N
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
p
N
N N
N Ni nrN
N g
N
N
N N N
N Idii N h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g fX
w
N N
N
N NN
N
N N N N
N
N
Nni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X
DUKE
Alp ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnnawmw N N Ntrtp w
9 9
FIGURE 10-11
ISOCONCENTRATION MAP
IRON IN ASH PORE WATER WELLS

N---------------� •�---------------------
A •
�, 50
ABMW-02'
o 1 1110 (957)
ABMW-03'�
j
L.
.. —..... —..... —.. r_..-1
-4
.•�-
Ali.
v
Lam.
MAYO
LAKE
1•
Its
•1
1 -
iLEGEND
50 N N fW h X
50 BOLD VALUESN N N
(50) N N hl'V h X
(50) BOLD VALUESN N N
r N hh N Kry N N
N
L N
O N N N
N N N
N N N N N N
NOTES:
N
N N
N hhi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hh N N
N NiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
fdni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X =
DUKE
All a
ENERGY
symTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnmm~ N N Nt rt p LL
9 9 a
FIGURE 10-12
ISOCONCENTRATION MAP
MANGANESE IN ASH PORE WATER WELLS

N---------------� •a------------
h .
• �J
• m
a
j
1
.--------------- ---1
LEGEND
6.5-8.5 TOTAL pH CONCENTRATION (S.U.)
6.5-8.5 BOLD VALUES INDICATE AN EXCEEDANCES
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF EXCEEDANCES)
MONITORING WELL
-
0
TOE DRAIN
Q
ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
.-
STREAM
LAKE
1•
4
NOTES:
1 CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
2 CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA 2L RANGE FOR pH IS 6.5 TO 8.5 S.U..
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
1�lp
symTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864-421-9999
www.synterracorp.com
�� DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA 27574
FIGURE 10-13
ISOCONCENTRATION MAP
pH IN ASH PORE WATER WELLS

N---------------� ••------------
o ..
A • •J -
W02(-1:0.2)
S-022
it
.. -.. -.. -..... -.. r_..-1
L.
4SIN i
1981
LANDFILL s.
MW-03'-� •'
Ira , Ali .. �.s;:..
Lam.
MAYO
LAKE
LEGEND
0.2 N N fW h X
0.2 BOLD VALUESN N N
(0.2) N N IW h X
(0.2) BOLD VALUESN N N
N N N IW N N
W N N N N N N
N
0 N
O N N N
-� N N N
N N N N N N
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N Ni nrN
N g
N
N
N
N
RVM N N N gt
hg
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g fX
w
N N
N
N NN
N
N N N N
N
N
Nni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
DUKE
All ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-14
ISOCONCENTRATION MAP
THALLIUM IN ASH PORE WATER WELLS

N--------------- ••---------------------
A • '
ff
s"
LEGEND
500 TOTAL DISSOLVED SOLIDS CONCENTRATION (mg/L)
500 BOLD VALUES INDICATE AN EXCEEDANCE5
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF LOWER CONCENTRATIONS)
MONITORING WELL
-
0 TOE DRAIN
Q ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
.-
STREAM
MAYO
LAKE
•
z,4
1•
s .J
:.r
1
NOTES:
1 CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
2 CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA2L FOR TOTAL DISSOLVED SOLIDS IS 500 mg/L.
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
1�lp
symTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864-421-9999
www.synterracorp.com
�� DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA 27574
FIGURE 10.15
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN ASH PORE
WATER WELLS

N---------------� ••------------
h ,
• �J
n 0.45(<0.3) R��1 ..�--�''_-•
S-022
i'
AE
31
A
ABMW-02' .�
�3.53 (2.59)
h-ft<
W-03'0.3)
J
j
.. —.. —.. —..... —.. r_..-1
Lam.
MAYO
LAKE
� / s
1•
A"�
`-1
1
LEGEND
0.3 N N NV h X
0.3 BOLD VALUESN N N
(0.3) N N KV h X
(0.3) BOLD VALUESN N N
N N N tW N N
W N N N N N N
� N
0 N
O N N N
N N N
N N N N N N
NOTES:
N
N N
N hhi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N hhi nrN
N g
N
N
N
N
RV M N N Ng)
hg
N
N
N N N
hit Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g BK
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X =
DUKE
All a
ENERGY
symTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnnawmw N N Ntrtp LL
9 9 a
FIGURE 10-16
ISOCONCENTRATION MAP
VANADIUM IN ASH PORE WATER WELLS

N---------------�
A •
h •
•
J '
r
• MWP16S'
• • <1 (<1)
j
_ MW-12S'
♦.—.....1 <1.....—..�..� �
MAYO
LAKE
LEGEND
1 N N tW h X
1 BOLD VALUESN N N
(1) N N fW hX
(1) BOLD VALUESN N N
N N N tW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N fdi nr N
N g
N
N
N
N
tW M N N Nn
hg
N
N
N N N
Nt ddi npp N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g hX
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnm""
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-17
ISOCONCENTRATION MAP
ANTIMONY IN SURFICIAL WELLS

N---------------�
A •
h
•
J '
r
• MWP16S'
• • <1 (<1)
j
_ MW-12S'
•.—.....1 <1.....—..�..� �
LEGEND
10 N N fW h X
10 BOLD VALUESN N N
(10) N N RV h X
(10) BOLD VALUESN N N
N fd N fW N N
W N N N N N N
•�- N N N
�._._ N N N
N N N N N N
I —
Lam.. � •
MAYO
LAKE
,
J
X
X
NOTES:
m
N
N N
N fdi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N fdi nr N N g
N
N
fd N N
N hh N h g
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N fdi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VV 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
fdni i IW
voh"
N
pi i 31i vii rrmii nbii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnm""
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-18
ISOCONCENTRATION MAP
ARSENIC IN SURFICIAL WELLS

N---------------�
A ,
h •
•
• MWP16S'
• . 46 (46)
j
_ MW-12S'
24 (23)
♦.—...... ...�..
L
MAYO
LAKE
,
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N IW h X
(700) BOLD VALUESN N N
N fd N fW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
X
X
NOTES:
m
N
N N
N fdi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N fdi nr N N g
N
N
fdN N
NNiiNhg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N fdi rm pJ N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
fdni i IW
voh"
N
pi i pii vii nmii nbii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnm""
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-19
ISOCONCENTRATION MAP
BARIUM IN SURFICIAL WELLS

N---------------� ••---------------------
A , '
♦
/ 4
♦ _ MWP16S'
/ ♦ ♦ < 50 (< 50)
' SR.1501`,' '.
MW-03'
847 (815) - —
�00 _ a • '
•• ACTIVE - � - - - -
ASH BASIN '
ABMW-03S' ,
1100 (1070)
1
L
MW-12S'
<.5� 050)
i
,l
MAYO
LAKE
♦
$
. A
`
J
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N RV h X
(700) BOLD VALUESN N N
N Id N fW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
X
X
NOTES:
N
N N
N fdi nr N N g
N
N N
N Idi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N Idi nrN N g
N
N
IdN N
NNiiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N Idi rm pJ N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
Idni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnmm~
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
m ssi N N <
N N Ntrtp
FIGURE 10-20
ISOCONCENTRATION MAP
BORON IN SURFICIAL WELLS

N--------------- •�---------------------
A •
• SR:l—
j
.. -.. -.. -..... -.. r_..-1
4
MWP16S'
0.011
LEGEND
0.035 N NV m
0.035 BOLD VALUESN N N
N NV
W N N
•�• � N
•�- N N N
�-• U._._ � N N
N N
I —
Lam.. � •
MAYO
LAKE
,
J
IW h X
N
N
X
N
N
N
N X
N
N
N
N
N
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N fdi nr N
N g
N
N
N
N N
NVMNgorN hJW c
ni nrX
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g hX
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i 31i vii rrmii nuii ndii
WN X
1�lp
symTerra
rrpvN N N Nni c
IN NMI m
vspEpnm""
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-21
ISOCONCENTRATION MAP
CHROMIUM (VI) IN SURFICIAL WELLS

�Il
N---------------� •�---------------------
Flu
L
31
♦
FILL s.
f-,
``�.
Lam.
MAYO
LAKE
,
LEGEND
1 N N NV h X
1 BOLD VALUESN N N
(1) N N NV hX
(1) BOLD VALUESN N N
N N N NV N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nr N
N 9
p
N
N N
N hhi nrN
N 9
N
N
N
N
IW )N N N NrN h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g Bx
w
N N
N
N NN
N
N N N N
N
N
Idni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X
DUKE
All ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-22
ISOCONCENTRATION MAP
COBALT IN SURFICIAL WELLS

N---------------� ••---------------------
n • �y •
•
� • MW-16S3
L
_ MW-12S'
295 (< 10)
�.. ......
FW
MAYO
LAKE
J
LEGEND
300 N N fW h X
300 BOLD VALUESN N N
(300) N N RV h X
(300) BOLD VALUESN N N
N fd N fW N N
� W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
X
X
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
p
N
N N
N fdi nr N
N g
N
N
fd N N
N fdi i N h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N fdi rm pJ N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VV 0
g
g Bx
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
voh"
N
pi i 31i vii rrmii nbii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnmm~
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-23
ISOCONCENTRATION MAP
IRON IN SURFICIAL WELLS

N---------------� ••---------------------
n • �y •
•
� • MW-16S3
L
MW-12S3
267 (249)
LEGEND
50 N N fW h X
50 BOLD VALUESN N N
(50) N N hl'r/ h X
(50) BOLD VALUESN N N
N fd N fW N N
W N N N N N N
•�� � N
•�- N N N
�._._ N N N
N N N N N N
I —
MAYO
LAKE
,
J
1
X
X
NOTES:
m
N
N N
N fdi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N fdi nr N N g
N
N
fd N N
N NiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N fdi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
fdni i IW
voh"
N
pi i 31i vii rrmii nbii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnm""
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-24
ISOCONCENTRATION MAP
MANGANESE IN SURFICIAL WELLS

N--------------- •�---------------------
A • '
Ao•
- I..;&Mu
94'
j
_ MW-12S3
5.7
L
17
Flu
1
1•
4
LEGEND
6.5-8.5 TOTAL pH CONCENTRATION (S.U.)
6.5-8.5 BOLD VALUES INDICATE AN EXCEEDANCE5
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF EXCEEDANCES)
MONITORING WELL
ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
—
STREAM
NOTES:
CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
s CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA 2L RANGE FOR pH IS 6.5 TO 8.5 S.U..
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
1�lp
symTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864-421-9999
www.synterracorp.com
�� DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA 27574
FIGURE 10-25
ISOCONCENTRATION MAP
pH IN SURFICIAL WELLS

N---------------�
A •
h •
•
J '
r
• MWP16S'
• • < 0.2 (< 0.2)
_ MW-12S'
< 0.2 (< 0.2)
♦.—...... ......
L
MAYO
LAKE
,
1
LEGEND
0.2 N N fW h X
0.2 BOLD VALUESN N N
(0.2) N N fW h X
(0.2) BOLD VALUESN N N
N N N fW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nr N
N g
o
N
N N
N fdi nr N
N g
N
N
N
N
RVM N N Ngt
hg
N
N
N N N
fdt ddi npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g fX
w
N N
N
N NN
N
N N N N
N
N
Idni i IVr/
vohti"
N
pi i pii vii ranii nuii ndii
WN X
1�lp
synTerra
rrpvN N N Nni c
IN NMI m
vspEpnm""
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-26
ISOCONCENTRATION MAP
THALLIUM IN SURFICIAL WELLS

N--------------:%
A /
h •
•
J '
r
• MWP16S'
• • 100
_ MW-12S'
50 .-- -- — -..�..,
li
LEGEND
500 TOTAL DISSOLVED SOLIDS CONCENTRATION (mg/L)
500 BOLD VALUES INDICATE AN EXCEEDANCE5
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF LOWER CONCENTRATIONS)
•
MONITORING WELL
• • -
ACTIVE ASH BASIN BOUNDARY
. _ . _ ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- STREAM
MAYO
LAKE
,
1
R
OPT
1•
' J
s
•J
:.r
NOTES:
1 CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
2 CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA2L FOR TOTAL DISSOLVED SOLIDS IS 500 mg/L.
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
1�lp
symTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864-421-9999
www.synterracorp.com
�� DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA 27574
FIGURE 10.27
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN SURFICIAL
WELLS

N---------------� ••---------------------
n • �y
\\ • i
•
I
L
•,1
Lam.. � •
MAYO
LAKE
,
J
1•
A"�
`-1
LEGEND
0.3 N N NV h X
0.3 BOLD VALUESN N N
(0.3) N N KV h X
(0.3) BOLD VALUESN N N
N N N tW N N
W N N N N N N
•�� N
N N N
U-_-_ N N N
N N N N N N
I —
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N fdi nr N
N g
N
N
N
N
RV M N N Ng)
hg
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g BK
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i 31i vii ranii nuii ndii
WN X =
DUKE
Alp a
ENERGY
s mTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnnawmw N N Ntrtp c
9 9 a
FIGURE 10-28
ISOCONCENTRATION MAP
VANADIUM IN SURFICIAL WELLS

N---------------�
A
•
0
h
J
. . . . . . .... .
L
it
1•
A- Ala
> .J
LEGEND
1 N N NV h X
1 BOLD VALUESN N N
(1) N N KV hX
(1) BOLD VALUESN N N
N N N NV N N
W N N N N N N
N
N N N
U-_-_ N N N
N N N N N N
I -
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N fdi nr N
N g
N
N
N
N
RV M N N Nn
hg
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g BK
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
tip DUKE
ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-29
ISOCONCENTRATION MAP
ANTIMONY IN TRANSITION ZONE WELLS

N---------------� ••--------
• �y
* ON
A •
• ,
j
L.
_ MW-12D'
1(C1)
�.—.....—...... ,
LEGEND
10 N N IW h X
10 BOLD VALUESN N N
(10) N N fW h X
MW-16D' (10) BOLD VALUESN N N
N N N IW N N
W N N N N N N
+a.. N
'•� •�- N N N
'4 - N N N
< I (Ns) - -�� �^ N N N N N N
x
1981 � ♦
LANDFILL . _ •
CW-01"
< 1 (NS)
��•�'00,
MAYO
LAKE
NOTES:
N
N N
N hhi nr N N g
N
N N
N Idi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N Ni nrN N g
N
N
N N N
N hhN h g
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g fX
w
N N
N
N NN
N N N N N
N
N
Nni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X =
DUKE
1�lp a
ENERGY
s mTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnnawmw N N Ntrtp LL
9 9 a
FIGURE 10-30
ISOCONCENTRATION MAP
ARSENIC IN TRANSITION ZONE WELLS

N------ ---------� h
A• Jy
i'
iri
MW-02 Wet 711171'-
55(53)
7
cw-021
129 (NS)
L.
MW-12D'
26 (23)
�.—...... ..�.., 1►
Flu
24(23)-----
1981 � ♦
LANDFILL s•. '
CW-014
< 5 (NS)
MAYO
LAKE
Ilk
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N IW h X
(700) BOLD VALUESN N N
N N N fW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
N
N N
N hhi nr N N g
N
N N
N Idi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hhN N
NNiiNhg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi rm pJ N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
Nni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN XLl
=
DUKE
All a
ENERGY
symTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnmm~ N N Nt rt p LL
9 9 a
FIGURE 10-31
ISOCONCENTRATION MAP
BARIUM IN TRANSITION ZONE WELLS

N---------------�
A
MW-12D'
<50(<50)
♦.—...... ......
L
i)
7
it
1•
A— Ala
s .J
`-1
1
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N RV h X
(700) BOLD VALUESN N N
N fd N fW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
m
N
N N
N fdi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N fdi nr N N g
N
N
fdN N
NNiiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N fdi rm pJ N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
Nni i IW
voh"
N
pi i pii vii rrmii nbii ndii
WN X
DUKE
All ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-32
ISOCONCENTRATION MAP
BORON IN TRANSITION ZONE WELLS

N---------------�
A •
♦
MW-12D'
/ 0.334
j
L.
MW 16D'
/ 0.051
LEGEND
0.035 N NV m
0.035 BOLD VALUESN N N
N NV
W N N
•�� � N
•�- N N N
�._._ N N
��— N N
I —
' MAYO
LAKE
IW h X
N
N
X
N
N
N
N X
N
N
N
N
N
NOTES:
m
N
N N
N fdi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N fdi nr N
N g
N
N
N
N N
NVMNgorN hJW c
ni nrX
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g hX
w
N N
N
N NN
N
N N N N
N
N
fdni i IVr/
vohti"
N
pi i pii vii ranii nuii ndii
WN X
1�lp
symTerra
rrpvN N N Nni c
IN NMI m
vspEpnmm~
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
ni ssi N N <
N N Ntrtp
FIGURE 10-33
ISOCONCENTRATION MAP
CHROMIUM (VI) IN TRANSITION ZONE WELLS

N---------------�
A -
• I
h •
•
J '
r
CW-031
r - < 1 (NS)
MW-02'
a4
MW-12D' /
LEGEND
1 N N NV h X
1 BOLD VALUESN N N
(1) N N NV hX
_ MW-'16D' (1) BOLD VALUESN N N
<1 (<1) N N N NV N N
W N N N N N N
•�� � N
•�� � N N N
SS)-��..�- N N N N N N
;�• I -
a'
ACTIVE -
ASH BASIN '
1981 � ♦
will -e
LANDFILL s.. '
J,
CW-014
< 1 (NS) '
,
c`
9 ♦
MAYO
LAKE
,
j
Ilk
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N 9
p
N
N N
N hhi nrN
N 9
N
N
N
N
IW )N N N NrN h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g Bx
w
N N
N
N NN
N
N N N N
N
N
Idni i IW
voh"
N
pi i pii vii ranii nuii ndii
WN X =
DUKE
All a
ENERGY
symTerra PROGRESS
rrpvN N N Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnnawmw N N Ntrtp LL
9 9 a
FIGURE 10-34
ISOCONCENTRATION MAP
COBALT IN TRANSITION ZONE WELLS

N---------------� ••---------------------
A /y i
r
L
MAYO
LAKE
,
'
1•
A"�
4
`-1
1
LEGEND
300 N N W h X
300 BOLD VALUESN N N
(300) N N RV h X
(300) BOLD VALUESN N N
N htt N Kry N N
� W N N N N N N
•�� � N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
m
N
N N
N hhi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
p
N
N N
N hhi nrN
N g
N
N
hh N N
N hbi i N h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g Bx
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
voh"
N
pi i pii vii rrmii nbii ndii
WN X =
DUKE
All a
ENERGY
symTerra PROGRESS
rrpvN N (N Mni c N N N N
a
(N Nmi m M ssi N N
vspEpnnawmw N N Ntrtp LL
9 9 a
FIGURE 10-35
ISOCONCENTRATION MAP
IRON IN TRANSITION ZONE WELLS

N---------------� ••---------------------
A , '
•
• � CW-[
• / M wwo?- �.
- • MW-02'
833 (_ 7.
r
BG-02°
135 (NS In35
L
4 4
LEGEND
50 N N fW h X
50 BOLD VALUESN N N
M6D' (50) N N hl'V h X
W-7,
269 (260) T r i. (50) BOLD VALUESN N N
N hh N Kry N N
50 W N N N N N N
• N
•�- N N N
024 ._.•��• U.= ._ N N N
1(NS) �•�-��-�_• ��^ N N N N N N
a'
Fm
PPOI88176)
•
♦
1 �
-F L 4.� '•
1
Lam.. ♦
MAYO
LAKE
•
.v
NOTES:
N
N N
N hhi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hh N N
N NiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
fdni i IW
voh"
N pi i pii viirrmii nuii ndii
WN X =
DUKE
All ENERGYa
s mTerra PROGRESS
rrpvN N dN Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnmm~ N N Nt rt p LL
9 9 a
N N
FIGURE 10-36
ISOCONCENTRATION MAP
MANGANESE IN TRANSITION ZONE WELLS

N---------------�
A • �
•
•
r
6D'
1
OPT
LAKE
LEGEND
6.5-8.5 TOTAL pH CONCENTRATION (S.U.)
6.5-8.5 BOLD VALUES INDICATE AN EXCEEDANCES
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF EXCEEDANCES)
MONITORING WELL
ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— STREAM
NOTES:
1 CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
2 CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA 2L RANGE FOR pH IS 6.5 TO 8.5 S.U..
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
1�lp
symTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864-421-9999
www.synterracorp.com
�� DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA 27574
FIGURE 10-37
ISOCONCENTRATION MAP
pH IN TRANSITION ZONE WELLS

N---------------� h
A• Jy
L
MW-12D'
< 0.2 (< 0.2)
�.—...... ......
7
it
SR:15p1 ,
CW-024
<0.2(NS)----���•
1981 � ♦
LANDFILL s.♦ '
J ,
CW-01°
Y
♦' MAYO
LAKE
1•
A"�
Ala
lt� .JJ� .�
LEGEND
0.2 N N fW h X
0.2 BOLD VALUESN N N
(0.2) N N IW h X
(0.2) BOLD VALUESN N N
N N N IW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N Ni nrN
N g
N
N
N
N
RVM N N N gt
hg
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g fX
w
N N
N
N NN
N
N N N N
N
N
Nni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
DUKE
All ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-38
ISOCONCENTRATION MAP
THALLIUM IN TRANSITION ZONE WELLS

ff
CW-034 _ MW=16D'
`• , 200
CW-024`�-
-� _�•
210
MW-12D8
120
1
1,
•
MAYO
LAKE
1•
' J
s
•J
:.r
LEGEND
500 TOTAL DISSOLVED SOLIDS CONCENTRATION (mg/L)
500 BOLD VALUES INDICATE AN EXCEEDANCE5
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF LOWER CONCENTRATIONS)
MONITORING WELL
ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
—
STREAM
NOTES:
1 CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
2 CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA2L FOR TOTAL DISSOLVED SOLIDS IS 500 mg/L.
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
1�lp
symTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864-421-9999
www.synterracorp.com
�� DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA 27574
FIGURE 10.39
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN TRANSITION
ZONE WELLS

N---------------�
A
El
j
4-
0.3 (N '�----��
a'
MW-07D'
•
1981
LANDFILL s.
CW-01"
0.543 (NNS
Lam.
MAYO
LAKE
,
LEGEND
0.3 N N NV h X
0.3 BOLD VALUESN N N
(0.3) N N IW h X
(0.3) BOLD VALUESN N N
N N N IW N N
W N N N N N N
N
N N N
�._._ N N N
N N N N N N
I —
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N hhi nrN
N g
N
N
N
N
IW M N N Ng)
hg
N
N
N N N
hit ddi npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g fX
w
N N
N
N NN
N
N N N N
N
N
Nni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
DUKE
Alp ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-40
ISOCONCENTRATION MAP
VANADIUM IN TRANSITION ZONE WELLS

N---------------� •�---------------------
h
/ •'� _ CW-04a
< 1 (NS) •
MW-03BR'
/ ftMW205BRia
<1 (NS)
,-o5a
LEGEND
1 N N NV hX
7 BOLD VALUESN N N
(1) N N fW hX
MW;16BR' (1) BOLD VALUESN N N
<1 (<1) m6mmo6m N N N NV N N
W N N N N N N
•�� � N
•�� N N N
a ._.•�� U._._ N N N
-�. .•�� ��^ N N N N N N
c�ei_ncai_ '
.r III/
Q-'07�9BR;i
1;
.f
��•�' X
Cam.. •
MAYO
LAKE
,
/ s
NOTES:
N
N N
N hhi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N hhi nrN
N g
N
N
N
N
RV M N N Nn
hg
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g hX
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
vohti"
N
pi i pii vii rttnii nuii ndii
WN X
DUKE
1�lp ENERGY°
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-41
ISOCONCENTRATION MAP
ANTIMONY IN BEDROCK WELLS

N---------------� ••---------------------
• �rn •
A / •'� _ CW-04a
< 1 (NS) •
MW-03BR'
/ ftMW205BRia
<1 (NS)
-n5a
LEGEND
10 N N fW h X
10 BOLD VALUESN N N
(10) N N fW h X
MW;16BR' (10) BOLD VALUESN N N
2.05 (2.07) N hh N fW N N
� W N N N N N N
•�• N
•�- � N N N
a ._.•�� U-_-_ � N N N
-�. .•�• ��^ N N N N N N
c�ei_ncai_ '
J
1 M�Wj096B
f
,
.fl
Lam• . ♦
♦' MAYO
LAKE
,
NOTES:
N
N N
N hhi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hh N N
N hhN h g
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g fX
w
N N
N
N NN
N N N N N
N
N
fdni i IVV
voh"
N
pi i pii vii rttnii nuii ndii
WN X
DUKE
1�lp ,
ENERGY.,
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-42
ISOCONCENTRATION MAP
ARSENIC IN BEDROCK WELLS

N---------------� W
%.,-
i0 J
C-04° - 25 (NS)
x _ i MW-03BR'
/ • M1N=14BR' r 46 (NS)
A2105BRWKWOMIC-
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N NV h X
MW;16BR' (700) BOLD VALUESN N N
11 (9) N N N NV N
� W N N N N N
•�• N
•�- � N N N
a ._.•�� U._._ � N N N
-�. .•�• ��^ N N N N N N
I —
Rmw �..—..
ENNER MWL09BR ._
1
LAKE
,
N X
N X
NOTES:
N
N N
N hhi nr N N g
N
N N
N fdi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hhN N
NNiiNhg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
fdni i NV
voh"
N
pi i pii vii ranii nuii ndii
WN X =
DUKE
a
ENERGY
synTerra PROGRESS
rrpvN N dN Nni c N N N N
a
IN NMI m ni ssi N N
vspEpnmm~ N N Nt rt p LL
9 9
a
arw,� N N N PtWpi m
h,E N N N PtWpi m
'# N N
FIGURE 10-43
ISOCONCENTRATION MAP
BARIUM IN BEDROCK WELLS

N---------------� %.,
0 J
•
- AW,
< 50 (NS) -
'x - i MW-03BR'
< 50 (NS)
IIV=I4BR'
50 (<''50)
�SR:1501
"
LEGEND
700 N N NV h X
700 BOLD VALUESN N N
(700) N N RV h X
MW;16BR' (700) BOLD VALUESN N N
< 50 (< 50) N hh N Kry N N
� W N N N N N N
•�• � N
•�� N N N
.�� _ N N N
( _'-� .•�• ��^ N N N N N N
I —
1961 b
7r
LANDFILL - - V • .
MW-096R3
< 50 (< 50) • 1 NOTES:
. ,` • m N N N N hhi nr N N g
D21B `
a ` N N N N hhi nrN N g
90) CW-01D
<50 (NS) : N N N N Ni nrN N g
p N N N N hhi nrN N g
D4BR' •�� N N hhN N NNiiN hg
i0) ; N N N N N Nt bi npJpJ N N
• N g
Y `� -♦ • N N N N N hhi nnp N
N N N N N N N N N 9
♦' MAYO W 9 9
N N N N N N N N N
LAKE
i �. ♦ N N VN 0 9 9
M�BR.NN N N Idni i IW vohN N N N N</
. ,.... ,'
�� �•L
0.
pi vi i rani i nui i nd i i
WN X
DUKE
-!
w�A<t5ENERGYoo
F=j Ter PROGRESS
01
rrpvN N dN Mni c N N N N a
(N Nvzi m M ssi N N o
vspEpnmmymw N N Nt rt p w
9 9 <
m
N N Ptwplm
FIGURE 10-44
ISOCONCENTRATION MAP
a
1 BORON IN BEDROCK WELLS
a

N--------------- •�---------------------
A •
\- • SR,1501 �a--
ABMW-02BR
0.00741
� I I
l• �
r
r /
I
•
j
.. -.. -.. -..... -.. r_..-1
4
MW;16BR'
LEGEND
0.035 N NV m
0.035 BOLD VALUESN N N
0.017 N NV
� W N
N N
•�• �
•�� N N N
W-02D° .�••�� U._-_ N N
.084--��-•�- ��^ N N
\�
1981 �
LANDFILL � _ '
MAYO
LAKE
,
$ • A
` J
�-� -�
`-1
1
IW h X
N
N
X
N
N
N
N X
N
N
N
N
N
NOTES:
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N hhi nrN
N g
N
N
N
N N
NVMNgorN hJW c
ni nrX
N
N
N N N
hit Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 g
g fX
w
N N
N
N NN
N
N N N N
N
N
Nni i IW
vohti"
N
pi i pii vii ranii nuii ndii
WN X
1�lp
symTerra
rrpvN N N Nni c
IN NMI m
vspEpnmm~
9 9
�� DUKE
ENERGY
PROGRESS
N N N N
I'll ssi N N <
N N Ntrtp
FIGURE 10-45
ISOCONCENTRATION MAP
CHROMIUM (VI) IN BEDROCK WELLS

N---------------�
A •
' I
♦ /
N
MW-11BR'
.'------------------ LEGEND
h ' 1 N N NV h X
•J` - cW-04° ' 7 BOLD VALUESN N N
r —
/ <1 (NS) • (1) N N NV hX
MW-03BR' MW;16BR' (1) BOLD VALUESN N N
MW-14BR' < 1 (NS) < 1 (< 1) , , N N N fW N N
1.41 (1.41) W N N N N N N
1 cW-05° ,SR fspl • _ . • N N N
< 1 (NS) cW-02U° . • U . _ . _ N N N
MW-O5BR' <1(NS) --�. --•��� ��^ N N N N N N
I -
GW-O6° '
I
.r f
MW-09BR ._
fl -
LAKE
,
k -.
3R'
NOTES:
N
N N
N hhi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N 9
p
N
N N
N hhi nrN
N 9
N
N
N
N
KV XN N N NN h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g Bx
w
N N
N
N NN
N
N N N N
N
N
fdni i IW
voh"
N
pi i pii vii rttnii nuii ndii
WN X
tip DUKE
ENERGY°
s mTerra PROGRESS ol
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-46
ISOCONCENTRATION MAP
COBALT IN BEDROCK WELLS

N---------------�
A •
•
----------------------.
LEGEND
^°' "` •
300 N N IW h X
300 BOLD VALUESN N N
•
(300) N N f+YV h X
•' " $
MW=03BR
(300) BOLD VALUESN N N
W-146R'
300 648 (NS)°'
y ,MW-16BR'
� N hh N fW N N
80
W N N N N N N
(12), -
SR
- /
/ -
CW-05°
CW-02D° - - _ . -
N N N
1060 (NS)
278 (NS) , / '
U - _ - _ N N N
N N N N N N
I —
CW-064
2040 (NS)
MW-07BR' MW-08BR'
339 (223) 2200 (2030)
ACTIVE
- - -
ASH BASIN
...�'
LANDFILL
�
•
MW-09BR
3000 (102)
.'
0
1
f♦
MAYO
LAKE
,
.�
r
NOTES:
m
N
N N
N hhi nr N
N g
N
N N
N Idi nrN
N g
^
N
N N
N Ni nrN
N g
p
N
N N
N Ni nrN
N g
N
N
N N N
N Idii N h g
N
N
N N N
Ntddi npJpJ N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N 9
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
VN 0
g
g fX
w
N N
N
N NN
N
N N N N
N
N
Idni i IW
voh"
N
pi i pii vii rttnii nuii ndii
WN X
tip DUKE
ENERGY.,
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-47
ISOCONCENTRATION MAP
IRON IN BEDROCK WELLS

N---------------� •'---------------------
h •
A ,
• �J
CW-04°
< 5 (NS) . ..: y
' MV1
73
544 (543)
MW-O5BR' CW
OCTIKIC
u
. .. . .. . .. . .. . ..
W
It-
.
SR,150
1
LEGEND
50 N N fW h X
50 BOLD VALUESN N N
(50) N N h1V h X
V=16BR' (50) BOLD VALUESN N N
(25) 1 1 N hh N Kry N N
� W N N N N N N
•�• N
} .•�- N N N N N
N
�. .•�• ��^ N N N N N N
CW-064
1450 (NS) .�y
MW-07BR' .. nco—T ol3 A
.
981
ND
LANDFILL �
J
MW-096R
X
�' MAYO
LAKE
FEW0BR'95�4)
♦
r
NOTES:
N
N N
N hhi nr N N g
N
N N
N Idi nrN N g
^
N
N N
N Ni nrN N g
p
N
N N
N hhi nrN N g
N
N
hh N N
N NiN hg
N
N
N N N Ntddi npJpJ N N
N
g
r
N
N
N
N N hhi nnp N
N N
N
N N
N N N N 9
W 0
9
9
�x
N
N
N
N N N N N N
N
N
VN 0
g g Bx
w
N N
N
N NN
N N N N N
N
N
Idni i IW
voh"
N
pi i pii vii rttnii nuii ndii
WN X
tip DUKE
ENERGY.,
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-48
ISOCONCENTRATION MAP
MANGANESE IN BEDROCK WELLS

N---------------�
A •
4
MW-16BR'
8.7�
LEGEND
6.5-8.5 TOTAL pH CONCENTRATION (S.U.)
6.5-8.5 BOLD VALUES INDICATE AN EXCEEDANCE5
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF EXCEEDANCES)
•
MONITORING WELL
•
ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
- . �— . •
f
�^
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
> -
STREAM
1981
LANDFILL s ♦ '
MW-09BR
6.5 � •
CW-01 D4
6.8
,
- - 1
Cam.. ♦
`♦' � MAYO
LAKE
my jOQ
79 '
.v
NOTES:
CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
s CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
8 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
5 THE NORTH CAROLINA 2L RANGE FOR pH IS 6.5 TO 8.5 S.U..
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET) _
DUKE
a
ENERGY
s mTerra PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT a
GREENVILLE, SC 29601 10660 BOSTON RD
864-421-9999 ROXBORO, NORTH CAROLINA 27574 LL
www.synterracorp.com a
FIGURE 10-49
ISOCONCENTRATION MAP
pH IN BEDROCK WELLS

N---------------� h --------------------
• Jy
-
<
... x _ MW-03BR'
/ • M1N=14BR' + < 0.2 (NS)
• < 0.2 (<0.2) .
. �SR;1 '
M_0W-O5BR� CW5°1
_. .. .. _ 7.., 5p.
LEGEND
0.2 N N f+YV h X
0.2 BOLD VALUESN N N
(0.2) N N fW h X
MW;16B R' (0.2) BOLD VALUESN N N
< 0.2 (< 0.2) N N N NV N
� W N N N N N N
•�� N
•�� � N N N
a ._.•��• N N N
�) �.�—.•�� ��^ N N N N N N
J
h.. M.1
R
0.2)
-1
.f
`♦' � MAYO
LAKE
•
.v
NOTES:
N
N N
N hhi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N Ni nrN
N g
N
N
N
N
RVM N N Ngt
hg
N
N
N N N
Nt Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g fX
w
N N
N
N NN
N
N N N N
N
N
Nni i IVV
vohti"
N
pi i pii vii rttnii nuii ndii
WN X
tip DUKE
ENERGY.,
s mTerra PROGRESS
rrpvN N N Nni c N N N N a
IN NMI m ni ssi N N o
vspEpnmm~ N N Nt rt p w
9 9
FIGURE 10-50
ISOCONCENTRATION MAP
THALLIUM IN BEDROCK WELLS

N--------------
A
/ mIAI
rr a
SR.1501 - 1'l-- I '
CW-02DU
250 - ..... '
190
1961
LANDFILL ,r � a
MW-09BR .-
220,
ABMW-02BR'
370 CW-01 D°
200 '
,
AIBM W-04BR'
370 X
' MAYO
LAKE
LEGEND
500 TOTAL DISSOLVED SOLIDS CONCENTRATION (mg/L)
500 BOLD VALUES INDICATE AN EXCEEDANCE5
NORTH CAROLINA2L CONTOUR (DASHED WHERE ESTIMATED)
(HASH MARKS INDICATE DIRECTION OF LOWER CONCENTRATIONS)
MONITORING WELL
ACTIVE ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- STREAM
NOTES:
1 CONCENTRATIONS ARE FROM THE MARCH 2O15 SAMPLING EVENT.
2 CONCENTRATIONS ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS ARE FROM THE JUNE 2015 SAMPLING EVENT.
° CONCENTRATIONS ARE FROM THE JULY 2015 SAMPLING EVENT.
THE NORTH CAROLINA2L FOR TOTAL DISSOLVED SOLIDS IS 500 mg/L.
6 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
7 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
8 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (hftp://services.nconemap.gov/)
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
(IN FEET)
tT i DUKE
ENERGY.,
s mTerra PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD o
864-421-9999 ROXBORO, NORTH CAROLINA 27574 w
www.synterracorp.com Q
FIGURE 10-51
ISOCONCENTRATION MAP
TOTAL DISSOLVED SOLIDS IN BEDROCK
WELLS

N---------------�
A •
,
,
M W-71 BR'
2.69 (2.39)
................
LEGEND
0.3 N N NV h X
0.3 BOLD VALUESN N N
(0.3) N N NV h X
tMW-16R" (0.3) BOLD VALUESN N N
2.68) m6mmo6m N N N NV N N
W N N N N N N
•�• N
•�� � N N N
•�� �._._-1 N N N
g) ��.•�•�_-�^ N N N N N N
+ F-'
I —
< 0.3 Q 0.3) .. — . .
0.3
_:;Ooo
•
MW-096R
1•
LAKE
,
h- �A-
\� f
NOTES:
m
N
N N
N hhi nr N
N g
N
N N
N fdi nrN
N g
^
N
N N
N Ni nrN
N g
o
N
N N
N hhi nrN
N g
N
N
N
N
NV M N N Ng)
hg
N
N
N N N
hit Ni npg% N N
N
g
r
N
N
N
N N Ni nnp N
N N
N
N N
N
N N N g
W 0
9
9
�x
N
N
N
N N N
N N N
N
N
ON 0 9
g BK
w
N N
N
N NN
N
N N N N
N
N
fdni i NV
vohti"
N
pi i pii vii rttnii nuii ndii
WN X
tip DUKE
ENERGY.,.
symTerra PROGRESS
rrpvN N dN Nni c N N N N a
(N Nmi m M ssi N N o
vspEpnmm~ N N Nt rt p w
9 9 a
m
N N N InWnl
h,E N N N In:m
�'#._'N N 1N QJ
F FIGURE 10-52
"`- ISOCONCENTRATION MAP
l _ VANADIUM IN BEDROCK WELLS

*A&Mn
ti
ABMW-013
� I
CONSTITUENT RESULT
B 4560
Ca 100
CI 16
t. • pH 7.6
��•••,����
� SO4 5.8
Sp Cond 1009
�\ TDS 540
t s'
r�
. i
, � r
e �
s* .� •/
- •"�
n -
�f -
r t
3R• 1400
SR•1328 P...�_
siQ�3?8 SRl-OV.
!i
�3
SR-1500 gQ
SR.1329
/ U
J
h
J
ABMW-023
CONSTITUENT
RESULT
B
9200
Ca
82.2
CI
12
pH
7.8
SO4
36
Sp Cond
684
TDS
450
7so?
F
I
r ,
ABMW-033
CONSTITUENT
RESULT
B
1940
Ca
54.5
CI
76
pH
6.6
SO4
42
Sp Cond
527
TDS
350
. "',' ��♦ �pA
A TIVE ANDFILL f , 1
AS BASIN
v
M
r
ABMW-043 z oQ
CONSTITUENT RESULT • ��
B 4930
Ca 120 r
CI 11 -� A 4
pH 7.5
SO4 38
r
Sp Cond 818 ����' i♦+-�
TDS 520 +�
-lie ,
1
N too•
= 1.J
LEGEND
MONITORING WELL
Q ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— — — — DITCH
STREAM
Constituent
Abbreviation
Units
Boron
B
µg/L
Calcium
Ca
mg/L
Chloride
CI
mg/L
Specific Conductance
Sp Cond
µmhos/cm
pH
pH
SU
Sulfate
SO4
mg/L
Total Dissolved Solids
TDS
mg/L
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
Z CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
SSITE AERIAL ORTHOPHOTOGRAPHY IS DATEDAPRIL 17, 2014. IT WAS OBTAINED FROM WSP
6ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION ANDANALYSIS AT (http://services.nconemap.gov/)
3 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://servioes.nconemap.gov/)
e DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83/2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
SR•1507tip
synTerra
148 RIVER STREET, SUITE 220,
L GREENVILLE, SC 29601
864421-9999
www.synterracorp.com
w
4 DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
FIGURE 10-53
CCR RULE DETECTION MONITORING
s� - ND. CONSTITUENT MAP
i� '�, ASH PORE WATER

MW-03'
CONSTITUENT
RESULT
B
847
pH
5.7
TDS
190
MW-1 ISS3
CONSTITUENT
RESULT
B
<50
Ca
9.57
CI
13
pH
6.0
SO4
5.3
Sp Cond
TDS
144.3
100
- - / SR.1501'
1981 � 1
• S, -n+ �` !� \ sR Aso
ACTIVE LANDFILL f ,
H BASIN r
♦ V
M
19
r♦4
•
41
r
y� I
t . 401- \�
r
ABMW-03S3
CONSTITUENT
RESULT
B
1100
Ca
4.78
CI
6.9
pH
5.2
SO4
<0.1
Sp Cond
136.5
TDS
110
/ ..
MW-12S3
t �
4.
CONSTITUENT RESULT
11 B <50
Ca 2.36
CI 3.1
_ k �1 pH 5.7
SO4 1.9 MR
Sp Cond 54.8
TDS 50
SR-1500 gQ
SR.1329
s1,7so?
2jkSR-i501
.J
LEGEND
MONITORING WELL
Q ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
r DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— - — - DITCH
STREAM
Constituent
Abbreviation
Units
Boron
B
µg/L
Calcium
Ca
mg/L
Chloride
CI
mg/L
Specific Conductance
Sp Cond
µmhos/cm
pH
pH
SU
Sulfate
SO4
mg/L
Total Dissolved Solids
TDS
mg/L
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
a CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
SSITE AERIAL ORTHOPHOTOGRAPHY IS DATEDAPRIL 17, 2014. IT WAS OBTAINED FROM WSP.
6ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION ANDANALYSIS AT (http://services.nconemap.gov/)
7 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://servioes.nconemap.gov/)
e DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83/2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
141P
synTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864421-9999
www.synterracorp.com
4 DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
FIGURE 10-54
CCR RULE DETECTION MONITORING
CONSTITUENT MAP
SURFICIAL AQUIFER

. -3411
MW-021
CONSTITUENT
RESULT
B
<50
pH
TDS
5.8
200
CW-034
CW-024
CONSTITUENT
RESULT
CONSTITUENT
B
RESULT
804
B
<50
Ca
66.6
Ca
CI
17.6
54
CI
100
pH
6.5
pH
5.1
SO4
15
SO4
49
Sp Cond
645
Sp Cond
285.E
TDS
440
TDS
210
h
J
A ACTIVE
W ASH BASIN
A '
.` �.
u�a
. i �o
• h
.1 y
f ul i r
e
� I
n
ABMW-04D3
CONSTITUENT
RESULT
B
5090
Ca
CI
143
11
pH
6.6
SO4
19
Sp Cond
1174
TDS
680
BG-024
CONSTITUENT
RESULT
B
<50
Ca
CI
56.1
30
pH
6.5
SO4
5.1
Sp Cond
623
TDS
370
w-'.
IV
I.
SR.1329
!A .. gR lh;.-' SK•13z8
'4po SQ`F"'e SR.1 gt , -
b
� � a
h
SR-1500 gQ
SR'so?
MW-16D3
CONSTITUENT
RESULT
B
<50
25.6
Ca
CI
8.8
pH
7.1
7.7
SO4
221
Sp Cond
160
- TDS
ZZ1111"Ir " .
_ � SR-15p1
MW-07h.d-
CONSTITUENT
B
Ca
1
pH
78
6.4
SO4
9
Sp Cond
668
TDS
390
�♦ S°A
r 1
1981 .• ,
LANDFILL • •4
1♦
v
M
MW-12D3
CONSTITUENT
RESULT
B
<50
Ca
12.6
CI
4
pH
6.2
SO4
0.96
Sp Cond
135.7
TDS
120
�IPI
s�
CW-014
CONSTITUENT
RESULT
B
<50
Ca
10.9
CI
23
pH
5.5
SO4
9.5
Sp Cond
TDS
182
150
LEGEND
Z MONITORING WELL
® ACTIVE ASH BASIN
1: _ : =r ASH BASIN COMPLIANCE BOUNDARY
C :: ] DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
— - — DITCH
STREAM
Constituent
Abbreviation
Units
Boron
B
µg/L
Calcium
Ca
mg/L
Chloride
CI
mg/L
Specific Conductance
Sp Cond
µmhos/cm
pH
pH
SU
Sulfate
SO4
mg/L
Total Dissolved Solids
TDS
MR/L
NOTES:
CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
Z CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
SSITE AERIAL ORTHOPHOTOGRAPHY IS DATEDAPRIL 17, 2014. IT WAS OBTAINED FROM WSP.
6ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION ANDANALYSIS AT (http://services.nconemap.gov/)
3 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://servioes.nconemap.gov/)
e DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD83/2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
114rip
synTerra
148 RIVER STREET, SUITE 220,
GREENVILLE, SC 29601
864421-9999
www.synterracorp.com
DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC POWER PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA27574
FIGURE 10-55
CCR RULE DETECTION MONITORING
CONSTITUENT MAP
TRANSITION ZONE

MW-05BR'
CONSTITUENT RESULT
B <50
Ca 95.9
CI
62
pH
7.1
SO4
3.8
Sp Cond
491.1
TDS
380
MW-13BR3
CONSTITUENT
RESULT
B
<50
Ca
75.2
CI
46
pH
SO4
7.2
18
Sp Cond
580
TDS
370
BG-014
CONSTITUENT
RESULT
B
<50
Ca
13.1
CI
11
pH
5.6
SO4
0.32
Sp Cond
151
TDS
130
SR 1828
SR,1400
MW-11 BR3
CONSTITUENT
RESULT
B
<50
Ca
49.6
CI
16
pH
8.1
SO4
14
Sp Cond
381.5
TDS
250
'�28 SRA�sr."
c9
�O
J
CW-044
CONSTITUENT
RESULT
B
<50
Ca
11.6
CI
6.4
pH
5.9
SO4
19
Sp Cond
162
TDS
160
ABMW-02BR3
CONSTITUENT
RESULT
B
<50
Ca
81.5
CI
27
pH
7.2
SO4
12
Sp Cond
631
TDS
370
MW-03BR'
CONSTITUENT
RESULT
B
<50
Ca
145
CI
160
SO4
9.4
TDS
660
ACTIVE
ASH BASIN
MW-16BR3
CONSTITUENT
RESULT
B
<50
Ca
22.5
CI
7
pH
8.7
SO4
12
Sp COnd
238.7
TDS
170
CW-02D4
CONSTITUENT
RESULT
B
363
Ca
36.6
CI
42
pH
6.1
SO4
49
Sp Cond
358.8
TDS
250
Ji
i SR-1501' ' r
1981
NDFILL
MW-10BR'
CONSTITUENT
RESULT
B
<50
Ca
36.8
CI
23
pH
7.9
SO4
83
Sp Cond
345.5
TDS
330
ABMW-04BR3
CONSTITUENT
RESULT
B
<50
Ca
85.3
CI
4.8
pH
7.4
SO4
80
Sp Cond
556
TDS
370
CW-064
CONSTITUENT
RESULT
B
<50
Ca
108
CI
89
pH
6.7
SO4
47
Sp Cond
890
TDS
560
5�
01
v
o
` MW-07BR3 co
CONSTITUENT RESULT '
B <50
Ca 57.3 AP,
MW-08BR3
CONSTITUENT
RESULT
B
<50
Ca
91.5
CI
120
pH
6.6
SO4
33
Sp Cond
858
TDS
550
LEGEND
Q� MONITORING WELL
„i�ACTIVEASH BASIN
_ ;ASH BASIN COMPLIANCE BOUNDARY
r. : J DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- - - DITCH
STREAM
Constituent
Abbreviation
Units
Boron
B
µg/L
Calcium
Ca
mg/L
Chloride
Cl
mg/L
Specific Conductance
Sp Cond
µmhos/cm
pH
pH
SU
Sulfate
SO4
mg/L
Total Dissolved Solids
TDS
mg/L
$ `r CI
15
rOQ
v
p H
NOTES:
o
7.4
1 CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
SO4
1.6
a
Sp Cond
469.5
2 CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.ol
?
TDS
270
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
MW-04'
4 CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
o
CONSTITUENT RESULT
MW-096R3
5STTE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
m
B <50
1 CONSTITUENT
RESULT
sADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
o
pH 6.3
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http://services.nconemap.gov/)
<50
B
TDS 190
22.6
r
Ca
7 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
10
ANALYSIS AT (http://services.neonemap.gov/)
2
CI
16
81
pH
6.3
e DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE1.
d
SYSTEM RIPS 3200 (NAD8312011).
CW-01 D4
CONSTITUENT
RESULT
B
<50
Ca
45.3
CI
10
pH
6.8
SO4
4.1
Sp Cond
348
TDS
200
r SO4 8.9
Sp Cond 226.4 GRAPHIC SCALE
TDS 220 1,000 0 1,000 2,000 3,000 4,000 5,000 0
+ + a
(IN FEET) NONE
DUKE
ENERGY
bynTerra
PROGRESS
148 RIVER STREET, SUITE 220,
MAYO STEAM ELECTRIC POWER PLANT
L
GREENVILLE, SC 29601
10660 BOSTON RD
864A21-9999
ROXBORO, NORTH CAROLINA27574
w
www.synterracorp.com
FIGURE 10-56
CCR RULE DETECTION MONITORING
CONSTITUENT MAP
BEDROCK WELLS

ABMW-023
CONST RESULT
Al 61
As 1020
Ba 173
Be 1.42
Cd <1
Cr <1
Cu <0.001
Fe 356
Hg <0.05
Mn 1110
MO 1830
Pb <1
S2 <0.1
Sb <1
Se <1
SO4 36
TI <0.2
V 3.53
11
1981
LANDFILL
ABMW-043
CONST
RESULT
' Al
71
As
499
Ba
448
Be
<1
Cd
<1
Cr
<1
Cu
<0.001
Fe
940
Hg
<0.05
Mn 641
MO 428
3 . ( Pb <1
o^ o S2 <0.2
D: Sb <1
y Se <1
4 � SO4 38
TI <0.2
V 2.84
S�'sod `'124!
,A
SR4400 SR-1328
sR�3?8
N
w
� o
'k � J
h
SR-1322 j
ABMW-033
CONST RESULT
Al 119
As 193
Ba 200
Be <1
Cd <1
Cr <1
Cu <0.001
Fe 3890
Hg <0.05
Mn 451
MO 75.6
Pb <1
S2 <0.2
Sb <1
Se <1
SO4 42
TI 0.289
V 0.68
SR•1507
LEGEND
Q� MONITORING WELL
f ACTIVE ASH BASIN
. _._. ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- DITCH
STREAM
Constituent
Abbreviation
Units
Aluminum
AI
µg/L
Antimony
Sb
µg/L
Arsenic
As
µg/L
Barium
Ba
µg/L
Beryllium
Be
µg/L
Cadmium
Cd
µg/L
Chromium
Cr
µg/L
Copper
Cu
mg/L
Iron
Fe
µg/L
Lead
Pb
µg/L
Manganese
Mn
µg/L
Mercury
Hg
µg/L
Molybdenum
Mo
µg/L
Selenium
Se
µg/L
Sulfate
SO4
mg/L
Sulfide
S2
mg/L
Thallium
TI
µg/L
Vanadium
V
µg/L
NOTES:
i CONCENTRATIONS SHOWN ARE FROM THE APRIL2015 SAMPLING EVENT.
2 CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
'SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
e ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http:/1services.n00nemap.gov1)
7 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (httpl/servioes.noonemap.govo
s DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD8312011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
44�ENERGY
DUKE
synTerra PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
- FIGURE 10-57
>> CCR RULE ASSESSMENT MONITORING
fsR1y12 SR�s� CONSTITUENT MAP
:r. 2 ASH PORE WATER

, w1.
L
M�
MW-12S3
CONST RESULT '
I Al 292 �3j4
As <1
Ba 24
Be <1
ABMW-03S3
CONST RESULT
Al 30
As 1.04
Ba 25
Be <1
Cd <1
Cr <1
Cu <0.001
Fe 2630
Hg <0.05
Mn 478
MO <1
Pb <1
S2 <0.1
Sb <1
Se <1
SO4 <0.1
TI <0.2
V <0.3
Cd
<1
Cr
1.61
Cu
<0.001
Fe
295
Hg
<0.05
Mn
267
'
11
MO
<1
Pb
<1
�J
p
S2
<0.1
Sb
<1
7p?,$e
-
V'
<1
SO4
1.9
TI
<0.2
V
0.403
SR.1500
, � SR 1329
a
3?8 j
SR4400 SR-1328
s .43
8
N
w
� o
J
SR-1322 j
MW-03'
CONST RESULT
As <1
Ba 56
Fe 34
S, Mn 880
Sb <1
TI <0.2
V
t�
MW-16S3
CONST RESULT
AI 17
As <1
Ba 46
Be <1
Cd <1
Cr <1
Cu 0.00102
Fe 860
Hg <0.05
Mn 260
MO 1.24
Pb <1
S2 <0.1
Sb <1
Se <1
SO4 5.3
' TI <0.2 - - hoN,
- V 0.303 r op
01- SR-1504i6m_
ACTIVE
SH BASIN 1981 .160
LANDFILL f
is Cl)
too
4�
r
`69
K- e ,
r
LAKE
S94
sR lg�?
SR-1507
LEGEND
Q� MONITORING WELL
�fy ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- DITCH
STREAM
Constituent
Abbreviation
Units
Aluminum
AI
µg/L
Antimony
Sb
µg/L
Arsenic
As
µg/L
Barium
Ba
µg/L
Beryllium
Be
µg/L
Cadmium
Cd
µg/L
Chromium
Cr
µg/L
Copper
Cu
mg/L
Iron
Fe
µg/L
Lead
Pb
µg/L
Manganese
Mn
µg/L
Mercury
Hg
µg/L
Molybdenum
Mo
µg/L
Selenium
Se
µg/L
Sulfate
SO4
mg/L
Sulfide
S2
mg/L
Thallium
TI
µg/L
Vanadium
V
µg/L
NOTES:
i CONCENTRATIONS SHOWN ARE FROM THE APRIL2015 SAMPLING EVENT.
2 CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
'SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
e ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http:/1services.n00nemap.gov1)
7 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (httpl/servioes.noonemap.govo
9 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
SYSTEM FIPS 3200 (NAD831'2011).
GRAPHIC SCALE
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
44�ENERGY
DUKE
synTerra PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 10-58
CCR RULE ASSESSMENT MONITORING
s CONSTITUENT MAP
- 2 SURFICIAL AQUIFER

I
e
SR4400
SR-1322
MW-16D3
CW-034 CONST RESULT
CONST RESULT Al 102
Al 89 As <1
As <1 Ba 13
Ba 19 Be I <1
Be <1 Cd <1
Cd <1 Cr <1
Cr <5 Cu <0.001
Fe 87
Cu <0.005 f ,Is e,-,wk
Fe 71 �► :1_--t�i Hg <0.05
Hg <0.05, - ((/�+{/"� Mn 269 N
Mn <5 JA Mo 10.1 CW
Mo <1 Pb <1 CONST
Al
47.
., Sb <1 Sb <1 As
s Se <1 Ba .✓
Se <1
SO4 15 SO4 7.7 Be y
r .. .. TI <0.2 .. .. �♦ o .. TI <0.2 �� .. _ Cd <1 N
♦ y 617
V 1.41 Cr <5
V 0.o'o
I ,. J T . ! - .. 1 Cu <0.005
S,Q 13 � .150 Fe <10
MW-021 ?4 .� �. Hg <0.05 SR-1504
L . 1 - CONST RESULT Mn 393 4411
As <1 j ACTIVE -
ABMW-04D3 Ba 55 U) ASH BASIN 1981 - • �� ; �'� Pb <1 5�
LANDFILL
CONST RESULT Fe 756 �' ' •� Sb <1 h
Al 199 Mn 833 ��+, p `,� MW-07D3 Se <1 y4
As 140 Sb <1 \ CONST RESULT SO4 49
Ba 755 TI <0.2
�Al 147 TI <0.2
Be <1 V 1.68 As <1 V <0.3
Cd <1 .♦ J Ba 24
Cr <1 ♦♦
CW-014 Be <1
Cu <0.001
Fe 28300 ♦� c' CONST RESULT + Cd <1
CONST s
♦• v� . Cr �Q
Hg <0.05 r Al 35 + Cu <0.001 �r0
Mn 3640 . 4 ` + 1 As <1 Fe 69
BG-02 Ba <5
Mo 269 r .� t Hg <0.05
Pb <1 I CONST RESULT ! Be <1
S2 <0.5 ` Al 193 - � - Cd <1 •./ Mn 188
Mo 1.35
Sb 3.68 As <1 (� ♦ - I Cr <5♦� Pb <1
Ba 54 ao Cu <0.005
Se <1 ' ` �� o o . S2 <0.1 � 1
SO4 19 Be <1 r y � Fe 31 Sb <1
Cd <1 J (0 Hg <0.05
V 233.3 Cr <5 MW-12D3 Mn 6 �• se <1
SO4 9
Cu <0.005 CONST RESULT +,�+ • Mo <1 %%r - TI <0.2
Fe 467 9 SR•1500 Al 184 �� �-• Pb <1 1507
�►'.. SR-
Hg <0.05 '132 As <1 Sb <1 r �� V 0.798 11^,•
Mn 135 Ba 26 Se <1 V }. •�
Mo <1 Be <1 SO4 9.5 I 1
Pb <1 Cd <1 S�X54 TI <0.2
Sb <1 Cr <1 V 0.543
Se <1 Cu <0.001
SO4 5.1 Fe 326 .. -�7�,
Hg <0.05 1 1,
SR-1328 SR70, 1.
S�V 5.88 Mo Mn 675
N Pb <1
`,- S2 <0.1 N
'r w
� � o Sb 1.63 r
_ J Se <1
` SO4 0.96 5 T
_ TI <0.2 SR-1512 SR-1512
V 0.719 0 ss
[r S11-15 2 cn
sp
J SR-1512 rs>2 SR1512 S47S'? '
LEGEND
Q� MONITORING WELL
ACTIVE ASH BASIN
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
- - - DITCH
STREAM
Constituent
Abbreviation
Units
Aluminum
Al
µg/L
Antimony
Sb
µg/L
Arsenic
As
µg/L
Barium
Ba
µg/L
Beryllium
Be
µg/L
Cadmium
Cd
µg/L
Chromium
Cr
µg/L
Copper
Cu
mg/L
Iron
Fe
µg/L
Lead
Pb
µg/L
Manganese
Mn
µg/L
Mercury
Hg
µg/L
Molybdenum
Mo
µg/L
Selenium
Se
µg/L
Sulfate
SO4
mg/L
Sulfide
S2
mg/L
Thallium
TI
µg/L
Vanadium
V
µg/L
NOTES: 'm
I CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT.
2 CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
w
3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT. a
m
a CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT. o
0
'SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP. c
'ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS OBTAINED FROM THE NC d
CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT (http://services.neonemap.gov/) S
m
7 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
ANALYSIS AT (http://services.neonemap.gov/) d
w`
e DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE x
SYSTEM RIPS 3200 NAD83/2011 . 9
GRAPHIC SCALE a
1,000 0 1,000 2,000 3,000 4,000 5,000
(IN FEET)
tT 4 DUKE
ENERGY
symTerm PROGRESS
148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
DRAWN BY: A. ROBINSON IDATE: 8/27/2015
FIGURE 10-59
CCR RULE ASSESSMENT MONITORING
CONSTITUENT MAP
TRANSITION ZONE

N
CW-044
MW-03BR'
MW-16BR3
CW-064
LEGEND
MW-14BR'
CONST
RESULT
CONST.
RESULT
CONST
RESULT
CONST
RESULT
A
CONST
RESULT
Al
200
AI
118
Al
88
AI
57
MONITORING WELL
Al
589
As
<1
As
Ba
<1
46
As
2.05
As
<1
ACTIVE ASH BASIN
As
<1
Ba
25
Be
<1
Ba
11
Ba
48
Be
<1
Be
<1
Be
<1
.. _ . _ - ASH BASIN COMPLIANCE BOUNDARY
Ba
30
Cd
<1
Be
<1
Cd
<1
Cr
<1
Cd
<1
Cd
<1
�i DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Cd
I <1
Cr
<5
Cu
<0.001
Cr
<1
Cr
<5
_ _ - _ _ DITCH
Cr
<1
Cu
<0.005
Fe
648
Cu
<0.001
Cu
<0.005
a
Cu
00045
Fe
87
Hg
<0.05
Fe
80
Fe
2040
STREAM
Fe 907 Hg <0.05 Mn 731 Hg <0.05 Hg <0.05
Hg <0.05 Mn <5 Mo 1.39 Mn 30 Mn 1450
CW-054 Mn 544
Mo <1 Pb <1 Mo 23.4 Mo 6.86
_
Pb <1 S2 <0.5 Pb <1 Pb <1
jHg
RESULT Mo 14 Sb <1 qS9e <' S2 0.264 MW-08BR3 sb <1
Pb <1
Al 272 S2 <1 - Se <1 9 4 Sb <1 CONST RESULT Se <1
`1 Sb <1 SO4 19 <0.2 Se <1 Al 110 SO4 47
57 TI <0.2 0.781 SO4 12 As <1 TI <0.2
<1 Se <' �..�..�..�. �..�.
SO4 12 r V 1.02 TI <0.2 Ba 66 V <1 TI <0.2 , J V 2.79 �' �, Be <1
<5-- `
<0.005 V 1.29 S •.`- `,SR1501 .:5' Cr <1
4 ` SR-1504
MW-05BR' `
<0.05 L .'� 1 +N rn .. Fe 2200 <0.05
785 CONST RESULT • / JASHSIN 1981 • - •.• `S Hg ACTIVE
<1 AI 57 ' rj .Mn 2680
<1 As <1 �It
L DFILL Q'•Mo 5.86 <1 Ba 31 / •\ + P • .� :`� Pb <1 Q
5
S2 0.196
Se <1 Be <1 - +
� � r'
SO4 7.5 Cd <1 '��� V
Cr <1 � h 4 Sb <1 MW-07BR3
TI <
Se <1
V <0.3 Cu <0.001 11 N'
I ,` _ SO4 33 CONST RESULT
� e
2
m
i
v
Q
o'
U
o`
a
0
0
Fe 4240 TI <0.2 AI 15 i
NOTES:
Hg <0.05 V <g 3 As <1 ' CONCENTRATIONS SHOWN ARE FROM THE APRIL 2015 SAMPLING EVENT. o
Mn 1740 c ` Ba 140 w
�•- • S < 2 CONCENTRATIONS SHOWN ARE FROM THE MAY 2015 SAMPLING EVENT.
Mo 4.27 �� + Be 1 m
Pb <1 `??j , C = Cd <1 3 CONCENTRATIONS SHOWN ARE FROM THE JUNE 2015 SAMPLING EVENT.
S2 <0.1 �� r - - - - ,h}• +v-9 /� ,► Cr <1 'CONCENTRATIONS SHOWN ARE FROM THE JULY 2015 SAMPLING EVENT.
Sb <1 `� ' ♦ +� ♦� *� 3 Cu <0.001
1.
" MW-09BR 'SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED FROM WSP.
Se <1 L _ CONST RESULT Fe 339
�.. �1-k /i ,• Hg <0.05 lo
sADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY ISDATED 2012. IT WAS OBTAINED FROM THE NC Q
MW-13BR MAYO Al3720 CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS AT htt llservices.neonema ovl
3 SO4 3.8 i o . Mn 263 P P 9 ) ,
TI <0.2 ��' o^' o . „ LAKE AS <1 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND
CONST RESULT V <p 3 `� r' Mo 3.72 w
� Ba 30 ANALYSIS AT (httpalservices.nconemap.govl)
Al 37 J ai .� Pb <1 x
AS <1 ` � Be `1 S2 0.112 a DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE 9
i Cd <1 SYSTEM FIRS 3200 NAD8312011 .
ti-..�,a
Ba 40 1500 ' ' 1 Cr 3.4 Sb <' GRAPHIC SCALE
SR �'� •L MW-04 se <1
Be <1 BG-014 1329 � �✓` Cu 0.00591 1,000 0 1,000 2,000 3,000 4,000 5,000
Cd <1 R . CONST RESULT SO4 1.6
CONST RESULT MW-11 BR3 BMW-04BIRMW-10BR' CW-01 D4 As <1 Fe 3000 TI <0.2 (IN FEET)
Cr <1 BMW-02BR 4 Hg <0.05
Al 418 CONST RESULT CONST RESULT CW-02D CONST RESULT CONST RESULT Ba 6 Mn 809 V <0.3 DUKE
Cu <0.001 CONST RESULT
As <1 AI 80 Al20 CONST RESULT •, Al641 Al11
o, Fe 70 1508
Fe 1130 Ba 97 As <1 „,� AI 64 As 1.08 Al 472 As <1 As <1 Mn 15 Mo 1.75 SR
Hg <0.05 As <1
Be <1 Ba 44 Ba 115 As <1 Ba 27 Ba <5 Pb <1 ; ENERGY
Mn .2 Cd <1 Q73a8 Ba <1 Ba 38 r Be <1 Sb <1 S2 <1
Mo 8.28 Be <1 Be <1 Be <1 �Be <1 TI <0.2 I
Cr <5 Cd <1 Cd <1 Be <1 Cd <1 Cd <1
Sb <1 s mTerm PROGRESS
Pb <1 `Y1 Cd <1 V 0.891 Se <1
S2 0.115 SR Cu <0.005 SR-1328 Cr 1.73 Cr <1 Cr <1 Cd <1 Cr 1.3 Cr <5
Sb <1 Fe 557 Cu <0.001 Cu <0.001 Cu <0.001 Cr <5 f Cu <0.001 Cu <0.005 SO4 8.9 148 RIVER STREET, SUITE 220, MAYO STEAM ELECTRIC POWER PLANT
H <0.05 Cu <0.005 Fe 883 TI <0.2 GREENVILLE, SC 29601 10660 BOSTON RD
Se <1 ! g Fe 115 Fe 107 Fe 1590 Fe <10 V 4.17 864421-9999 ROXBORO, NORTH CAROLINA27574
SO4 18 Mn 23 Hg <0.05 Hg <0.05 Hg <0.05 Fe 278 Hg <0.05 Hg <0.05 LA www.synterracorp.com
Mo <1 H <0.05 Mn 894
TI <0.2 Mn 67 0 Mn 149 Mn 407 g Mn <5 DRAWN BY: A. ROBINSON DATE: 812712015
V 0.381 Pb <1 Mo 5.41 Mo 5.67 Mo 6.12 Mn 81 Mo 2.37 Mo 20.8 r� CHECKED BY: J. MEADOWS DATE: 8/27/2015
PROJECT MANAGER: J. WYLIE
Sb <1 Pb <1 Pb <1 Pb <1 Mo <1 Pb <1 Pb <1
1 Se <1 S2 <0.1 S2 <O.1 S2 <0.1 Pb <1 S2 <10 Sb <1 FIGURE 10-60
SO4 0.32 Sb 1.32 - Sb <1 Sb <1 Sb <1 Sb <1 SR-1 Se <1
CCR RULE ASSESSMENT MONITORING
Se <1 Se <1 SF Se <1 Se <1 !- Se <1 SO4 4.1
S V 4.94 SO4 14 SO4 12 SO4 80 SO4 49 SO4 83 CONSTITUENT MAP
TI <0.2
TI 0.323 TI <0.2 TI <0.2 TI <0.2 % TI <0.2 V 1.09 SR 1512 SQ 7512 BEDROCK �+
V 2.69 V 0.873 V 0,382 V 0.585 °N V 1.66 DE�RO"K WELL)
Constituent
Abbreviation
Units
Aluminum
AI
µg/L
Antimony
Sb
µg/L
Arsenic
As
µg/L
Barium
Ba
µg/L
Beryllium
Be
µg/L
Cadmium
Cd
µg/L
Chromium
Cr
µg/L
Copper
Cu
mg/L
Iron
Fe
µg/L
Lead
Pb
µg/L
Manganese
Mn
µg/L
Mercury
Hg
µg/L
Molybdenum
Mo
µg/L
Selenium
Se
µg/L
Sulfate
504
mg/L
Sulfide
S2
mg/L
Thallium
TI
µg/L
Vanadium
V
µg/L

80%
' 6096
40% m
t
2 0 96 .�
vo va
cl cl
a —
814
1410
synTerra
►J
AL
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.synterracorp.Com
DRAWN BY: J. GILMER DATE: JUNE 2015
PROJECT MANAGER: J. WYLIE
LAYOUT:
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW
Assessment Plan\1.11 CSA
Reporting\Figures\Statistics\Piper Diagrams
0 96
6 0 %
40%
0%
■ ABMW-01
• ABMW-02
• ABMW-03
7 ABMW-04
Z MW-163
V ABMW-03S
V M-12S
at ABMW-04D
AL D -02
,L W-01
• W-02
AL W-03
AL MW-07D
1 MW-12D
k MW-16D
} ABMW-02BR
} ABMW-048R
} D-01
} CW-01 D
} W-02D
} W-04
} W-05
} W-06
} MW-03BR
} MW-05BR
} MW-07DR
MW-02
�} MW-03
MW-04
FIGURE 10-61
PIPER DIAGRAM — ALL GEOLOGIC UNITS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON ROAD
ROXBORO, NORTH CAROLINA 27574

o q} a ABMW-01
• ABMW-02
; o • ABMW-03
V ABMW-04
o �
0
■
a t30
80% 80%
60% � � 6 0 % p
40% 40%
a CPO.
20% if A 20%
O, O, O� 1k 110
0 0 0 0
CaCI
148 RIVER STREET, SUITE 220 FIGURE 10-62
GREENVILLE, SOUTH CAROLINA 29601 PIPER DIAGRAM - ASH PORE WATER
PHONE [phone]
www.s nterracor .com
DRAWN BY: J. GILMER DATE: JUNE 2015
synTerra LAYOUT:
MANAGER:J. wvue MAYO STEAM ELECTRIC PLANT
LAYOUT:
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assessment .11 CSA ROXBORO, NORTH CAROLINA 27574
Reporting\Figures\ures\Statistics\Piper Diagrams

w a IrtVIpV �V,-1�1 / r8 �7
�� yy AL
1F�'�S1Q�M �V11 Vim�}}-��0 3 3
Cf a i IVIVV-12S
AL -ol
i� xa V CW-02
M-07D
z M -12D
80 ' E 80
°'�
60% " � c� � 60% 0
a
40% cl 40%
a
20% � E 2 0 %
7 7 7 0a loa �oa
a
FIGURE 10-63
148 GREEN ILLE,S ET,SUITE AROLI PIPER DIAGRAM —ALLUVIAL SAPROLITE, AND
GREENVILLE, SOUTH CAROLINA 29601 ,
PHONE[phone] TRANSITION ZONE
www.s nterracor .com
DRAWN BY: J. GILMER DATE: JUNE 2015
synTerra[P:\Duke
PROJECT MANAGER J. WYLIE
LAYOUT: MAYO STEAM ELECTRIC PLANT
Energy Progress.1026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assess Plan\1.11 CSA
Reporting\Figures\Statistics\Piper Diagrams ROXBORO NORTH CAROLINA 27574

cp
a ■ ABMVV-020R
ABMVV-040R
61
;off �� 1 BC-01
CVV-01 D
o CW-02D
/ 40,
Z CVV-04
'a ■ CVV-05
cl J► CVV-06
V MVV-030R
MVV-050R
Z MVV-07BR
MVV-08BR
! MVV-090R
a 1 MVV-100R
IF MVV-110R
80% � 80% MVV-13BR
° C?, o MVV-14BR
60% � ,�� 60% Jr MVV-160R
ea MVV-02
40% 40% MVV 03
a co% r MVV-04
—1�1a a a a
0 0 0 0
Ca CI �!
410
synTerra
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601
PHONE [phone]
www.synterracorp.Com
DRAWN BY: J. GILMER DATE: JUNE 2015
PROJECT MANAGER: J. WYLIE
LAYOUT:
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW
Assessment Plan\1.11 CSA
Reporting\Figures\Statistics\Piper Diagrams
FIGURE 10-64
PIPER DIAGRAM - BEDROCK
MAYO STEAM ELECTRIC PLANT
10660 BOSTON ROAD
ROXBORO, NORTH CAROLINA 27574

0
9
7
m
a-,
0
o
4
_ o y
LIG.1
BG 2 C+N-1 Cw.1D
CW-2 CW-2D
Cw-3 CW-4 Cw5 cw-&
15 NCAC 02L Standard = 700 µg/L
15 NCAC 02L Standard = 700 µg/L
0
J
O O
V
ra
O
ry
1313•1
Bc 2 cw.1 CW1D
CW-2 cw.2D
CW3 CW4 Cw-5 cw-6
ram.,
0
15 NCAC 02L Standard = 2 µg/L
— — — — — — — — — — — — — — — — — — — — — — — — —
— — — — — — — — — — —
— — — — — — — — — — — — — — — — — — — — — — — — —
J
E
� a
E
m
u
0
G
150•1
813•2 cw•1 cw•10
CW-2 CW-213
Cw G'A 4 CW5 CW 6
FIGURE 10-65
148 RIVER STREET, SUITE 220
GRLI
GREENVILLE, SOUTH CAROLINA 29601
COMPLIANCE WELL BOX AND WHISKER PLOTS
PHONE [phone]
BARIUM, BORON, CADMIUM
www.s nterracor .com
DRAWN BY: J. GILMER DATE: AUGUST 2015
PROJECT MANAGER J WYLIE
S)m
err,
LAYOUT:
MAYO STEAM ELECTRIC PLANT
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW
Assessment Plan\1.11 CSA
Reporting\Figures\Statistics\Box Plots
10660 BOSTON ROAD
ROXBORO, NORTH CAROLINA 27574

E
i7
0
L
V
r�
15 NCAC 02L Standard = 10 µg/L P
P
BG-1 BC 2 c w 1 CbV 1D GW-2 CW-21D CW-3 CW-4 CW-5 cW-6
0
9
RG 1 6G 2 C%V 1 C',^d ;n CGV 2 GW-21) GIN-3 CW4 CW-5 CW-6
15 NCAC 02L Standard = 250 mg/L
15 NCAC 02L Standard = 300 µg/L V
— — — — — — — 77 — — — — — — — — — — - — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
BG 1 [sC, 2 G:'! 1 G'A'' 1 D CW 2 C:','':' ?D C',''J 3 C+,'d 4 :'.^ C11116
FIGURE 10-66
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601 COMPLIANCE WELL BOX AND WHISKER PLOTS
GRLI
PHONE [phone] CHROMIUM, CHLORIDE, IRON
,tip
www.s nterracor .com
DRAWN BY: J. GILMER DATE: AUGUST 2015
S)m err, PROJECT MANAGER J WYLIE
LAYOUT: MAYO STEAM ELECTRIC PLANT
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assessment Plan\1.11 CSA ROXBORO, NORTH CAROLINA 27574
Reporting\Figures\Statistics\Box Plots

4
O
O
T o —� T 15 NCAC 02L Standard = 50
— -- --
BCr1 BG-2 CW-1 CW-10 CW-2 CW-20 CW3 CW-4 cv.. 5 c1N-6
7 4
n
0
J
OG
n
N
Y
V n
Z
� O
O
O
O O
vs —�
i3G 1 RG 2 CW1 CW10 CW-2 CW-213 CW3 CW-4 cw-5 CW-6
15 NCAC 02L Standard = 100 µg/L
0G 1 90-2 CW-1 CW-1D CW2 CW-2D cw-3 GW. 4 Cw-5 CW rn
15 NCAC 02L Standard = 250 mg/L
FIGURE 10-67
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601 COMPLIANCE WELL BOX AND WHISKER PLOTS
GRLI
PHONE [phone] MANGANESE, NICKEL, SULFATE
www.synterracorp.com
DRAWN BY: J. GILMER DATE: AUGUST 2015
s�mTerra PROJECTMANAGER . WYLIE
LAYOUT: MAYO STEAM ELECTRIC PLANT
P:\Duke Energy Progres51026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assessment Plan\1.11 CSA ROXBORO, NORTH CAROLINA 27574
Reporting\Figures\Statistics\Box Plots

ra
F
15 NCAC 02L IMAC = 0.2 µg/L
BG-1 BG-2 cw-1 Cw-1D CWO 2 Cw-211) CW-3 CW-4 CM5 Cw.6
15 NCAC 02L Standard = 500 µg/L _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ T
O
BG.1 RG2 CIN1 CW.1U C`N.2 GW21) Cw.3 CW-4 CW.5
FIGURE 10-68
148 RIVER STREET, SUITE 220
GREENVILLE, SOUTH CAROLINA 29601 COMPLIANCE WELL BOX AND WHISKER PLOTS
GRLI
PHONE [phone] THALLIUM, TOTAL DISSOLVED SOLIDS
www.synterracorp.co,tip m
DRAWN BY: J. GILMER DATE: AUGUST 2015
synTerr, PROJECT MANAGER J WYLIE
LAvour: MAYO STEAM ELECTRIC PLANT
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW 10660 BOSTON ROAD
Assessment Plan\1.11 GSA ROXBORO, NORTH CAROLINA 27574
Reporting\Figures\Statistics\Box Plots

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620
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O O O O O O O O O O O O O O O O O O O O O O
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+ + + + + + + + + + + + + + + + + + + + + + +
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•- - - - - - - c- N N N
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cp It IT U') LO LO LO LO LO LO LO LO LO CO CO CO (0 (0 CO CO CO (0 (0 r- r1-r- I� r1-r-
SOUTHWEST
Station
(feet)
SB-7
SECTION
B-B' -
ANTIMONY
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6
FACING NORTHWEST
4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
MW-3
MW-3: pH5.71/Sb<1/As<1/Ba56/B847/Cr(VI)0.155/Co<1/Fe34/Mn880/TI<0.2/TDS 190/V<0.3
CW-2/
2D
CW-2:
470
pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 / TDS 370 / V 5.88
CW-2D:
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T460
460
50
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4
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B-B' - ANTIMONY
FACING NORTHWEST
ICOALASH
TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
.2u)
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR ANTIMONY IS 1 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-1A
f%,. DUKE
� ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-1a
GEOLOGIC CROSS SECTION B-B'
WITH ANTIMONY

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FACING NORTHWEST
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460
460
50
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B-B' - ANTIMONY
FACING NORTHWEST
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
��
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
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NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 . THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR ANTIMONY IS 1 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-1A
DUKE
ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-1a
GEOLOGIC CROSS SECTION B-B'
WITH ANTIMONY

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SECTION C-C' - ANTIMONY
FACING NORTH
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
V WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR ANTIMONY IS 1 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-113
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-1 b
GEOLOGIC CROSS SECTION C-C'
WITH ANTIMONY

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FACING NORTHWEST
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+ + +
CO fl- 00
+ +
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+ + + + + + + + + + +
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r- 00
00 00 00 00 00 00 00 00 00 O O
NORTHEAST
SECTION B-B' - ARSENIC
FACING NORTHWEST
ICOALASH
TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
.2u)
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR ARSENIC IS 10 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-2A
(� DUKE
� ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-2a
GEOLOGIC CROSS SECTION B-B'
WITH ARSENIC

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45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
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1 6
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44
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MW-07D: pH 6.4 / Sb <1 / As <1 / Ba 24 / B <50 / Cr(VI) NS / Co <1 / Fe 69 / Mn 188 / TI <0.2 / TDS 390 / V 0.798
MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 111�1540
MW-08S/ 08D/ 08BR
530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb <2.7 / As <2.7 Ba 130 B <53.1 Cr 67.1 Co 7.4 Fe 11400 Mn 875 / TI <2.7 / V 25.2
ML
bw
SECTION C-C' - ARSENIC
FACING NORTH
510
500
490
►D
'Coll"
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
V WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR ARSENIC IS 10 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-213
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-2b
GEOLOGIC CROSS SECTION C-C'
WITH ARSENIC

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SECTION
B-B' -
BARIUM
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6
FACING NORTHWEST
4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
MW-03
MW-03: MW-03: pH 5.71 / Sb <1 / As <1 / Ba 56 / B 847 / Cr(VI) 0.155 / Co <1 / Fe 34 / Mn 880 / TI <0.2 / TDS 190 / V <0.3
COAL ASH
TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
o�
�/ FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
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ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR BARIUM IS 700 pg/L.
CW-2/ 2D
470 CW-2: pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 / TDS 370 / V 5.88
CW-2D: pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460 1 1 1 1 1 1 1460
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4 0 a0 MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
of MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
43 w 1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J 23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4
420 p 33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/TI<7.5/V16.3 erra
} 54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87
410
148 River Street, Suite 220
Greenville, South Carolina 29601
400 0 400 864-421-9999
w www.synterracorp.com
390 w LL 390
0 0 DRAWN BY: C. NEWELL DATE: 8/5/2015
380 41< 380 CHECKED BY: J. WYLIE DATE: 8/5/2015
j 54 v m 370 PROJECT MANAGER: K. WEBB
W LAYOUT NAME: FIGURE 11-3A
46 360
r
DUKE_ --- 350
340
W -38 - - 0 13 GRAPHIC SCALE
J --- --- --- ---- 330
ENERGY
--- --- --- --- ---- --- --- --- --- --- 320 300 0 300 600 PROGRESS
--- ---- ---- ---
___ --- IN FEET
Q 310 MAYO STEAM ELECTRIC PLANT
7 ___ ___ ___ ____ __ ____ __ ____ ___ ___ HORIZONTAL:1"=300' 10660 BOSTON RD
--- --- ---- ---- ---
300 - - - - - - - - - - - - - - - 300 30 0 30 60 ROXBORO, NORTH CAROLINA
o O O O O O O O O O O O O O O O
o O O O O O O O O O O O O O O O
(0 rl- 0+0 M +O + N M � LO (0 r` 0+0 M O + IN FEET FIGURE 11-3a
r` ti r-- 00 o0 00 00 00 00 00 00 00 00 M rn
NORTHEAST VERTICAL:1"=30' GEOLOGIC CROSS SECTION B-B'
SECTION B-B' - BARIUM NOTE: 10:1 VERTICAL EXAGGERATION
FACING NORTHWEST WITH BARIUM

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MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 540
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530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb <2.7 / As <2.7 / Ba 130 / B <53.1 / Cr 67.1 / Co 7.4 / Fe 11400 / Mn 875 / TI <2.7 / V 25.2
510 51U
500 500
490 NO DATA 490
480 480
H
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LLI c J
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400
--- --- -- --- ---- ---
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380 --- --- --- --- --- -- 140 - --- --- --- --- --- 380
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370 370
360
360
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O O O O O O O O O O O O O O O O O O O O
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SECTION C-C' - BARIUM
FACING NORTH
SECTION C-C' - BARIUM
FACING NORTH
510
500
490
ED
041111
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR BARIUM IS 700 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-313
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-3b
GEOLOGIC CROSS SECTION C-C'
WITH BARIUM

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O O O O o O O O O O O O O O O O O o O O O o O O O O O O O O O O O O O O O O O O O O O O O O o O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
O O O O o O O O O O O O O O O O O o O O O O o O o O O CD o O O O O O O O O O O O O O O O O o O O o O O O O O O O O O O O O O O O O O O O O O O O O O O O
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O N M d co r'- M O CD- N M ,I-LO CO r- CO O O �- N CO � LO (D r-- 00 M CD- N M "I- LIDCfl ti CID O �- N M � Ln CO r` M M O N M -' LID CO r1- M O CD- N M ,I- LO (fl r- M M CD M 'z Lo
•- - - - - - - c- N N N N N N N N N N co co M M co co co co M M It" It I- dt It It cp It IT U') LO LID LO LO LID LO LO LID LO CO CO CO (0 (0 CO CO CO (0 (0 r- ti r- ti ti r-
SOUTHWEST
Station
(feet)
S113-7 SECTION B-B' - BORON
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6 FACING NORTHWEST
4.5'-7.5': Sb <6 / As <6 / Ba 15.5 / B <15 / Cr 8.2 / Co <6 / Fe 6040 / M n 226 / TI <6 / V 8.2
MENhow-
-
Not
M W-3
MW-3: pH 5.71 / Sb <1 / As <1 / Ba 56 / B 847 / Cr(VI) 0.155 / Co <1 / Fe 34 / Mn 880 / TI <0.2 / TDS 190 / V <0.3
COAL ASH
TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
o�
�/ FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR BORON IS 700 pg/L.
CW-2/ 2D
470 1 1 1 1 1 CW-2: pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 /TDS 370 / V 5.88
CW-211): pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460 460 aW!g
50 Q MW-16S/ 16D/ 16BR
p MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
4 0 MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
W 43 MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
Q 1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J 23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4 erra
420 33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/TI<7.5/V16.3
410-7 � 1� �
54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87 148 River Street, Suite 220
�
p Greenville, South Carolina 29601
400 w 400 864-421-9999
LL www.synterracorp.com
390 w 2 2 390
F- H z DRAWN BY: C. NEWELL DATE: 8/5/2015
380 U D Q 380 CHECKED BY: J. WYLIE DATE: 8/5/2015
w 804 rle
U m 370
PROJECT MANAGER: K. WEBB
W LAYOUT NAME: FIGURE 11-4A
_ - <50 360
07 _ _
350
DUKE
340
-363-
z - - - - 330 GRAPHIC SCALE E N E RGY
-j
--- ----
--- --- --- --- ---- --- . . . . .--- --- --- --- 320 300 0 300 600 PROGRESS
� --- --- ---_ --- --- _ ---- <50- ---_ --- IN FEET
Q 310 MAYO STEAM ELECTRIC PLANT
HORIZONTAL:1"=300' 10660 BOSTON RD
--- --- ---- ---- ---
300 - - - - - - - - - - - - - - - 300 30 0 30 60 ROXBORO, NORTH CAROLINA
o O O O O O O O O O O O O O O O
0 o O o O O O O O O O O o O O O
+ + + + + + + + + + + + + + + +
CO rl- 00 O O N CO � LO (0r--00 M CD IN FEET FIGURE 11-4a
r` r_ r-- co 00 00 co 0o co co 0o co co M rn
NORTHEAST VERTICAL:1"=30' GEOLOGIC CROSS SECTION B-B'
SECTION B-B' - BORON NOTE: 10:1 VERTICAL EXAGGERATION
FACING NORTHWEST WITH BORON

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0'-2': Sb<6.5/As<6.5/Ba72.9/B<16.3/Cr6.1/Co<6.5/Fe19600/Min 82.8/TI<6.5/V32.4
52'-54': Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/Co6.6/Fe10400/Min 789/TI<5.1/V13.1
ABMW-02/ 02BR
ABMW-02: pH 7.8 / Sb <1 / As 1020 / Ba 173 / B 9200 / Cr(VI) 0.017 / Co <1 / Fe 356 / Mn 1110 / TI <0.2 / TDS 450 / V 3.53
ABMW-02BR: pH 7.2 / Sb <1 / As <1 / Ba 159 / B <50 / Cr(VI) 0.007 / Co <1 / Fe 107 / Mn 149 / TI <0.2 / TDS 370 / V 0.873
45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
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MW-07D: pH 6.4 / Sb <1 / As <1 / Ba 24 / B <50 / Cr(VI) NS / Co <1 / Fe 69 / Mn 188 / TI <0.2 / TDS 390 / V 0.798
MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 540
MW-08S/ 08D/ 08BR
530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb <2.7 / As <2.7 Ba 130 B <53.1 Cr 67.1 Co 7.4 Fe 11400 Mn 875 / TI <2.7 / V 25.2
SECTION C-C' - BORON
FACING NORTH
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
V WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR BORON IS 700 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-413
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-4b
GEOLOGIC CROSS SECTION C-C'
WITH BORON

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SOUTHWEST
Station
(feet)
SB-7 SECTION B-B' - COBALT
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6 FACING NORTHWEST
4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
MW-3
MW-3: pH5.71/Sb<1/As<1/Ba56/B847/Cr(VI)0.155/Co<1/Fe34/Mn880/TI<0.2/TDS190/V<0.3
IN
pip
COAL ASH
TRANSITION ZONE
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
.2u)
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR COBALT IS 1 pg/L.
CW-2/ 2D
470 1 1 1 1CW-2: pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 /TDS 370 / V 5.88
CW-211): pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460 460
50 Q MW-16S/ 16D/ 16BR
p MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
4 0 MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
w 43 MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
Q 1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J 23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4 erra
420 33'-35': Sb <7.5 / As <7.5 / Ba 131 / B 16.8 j / Cr 9.2 / Co 12 / Fe 19100 / Mn 1630 / TI <7.5 / V 16.3
410 < 54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87 148 River Street, Suite 220
p Greenville, South Carolina 29601
400 w 400 864-421-9999
www.synterracorp.com
390 w 2 2 390
H z DRAWN BY: C. NEWELL DATE: 8/5/2015
380 D < 380 CHECKED BY: J. WYLIE DATE: 8/5/2015
11 j 7 0 co 370 PROJECT MANAGER: K. WEBB
LU _ LAYOUT NAME: FIGURE 11-5A
= _ _ ! 4.32 360
C0
DUKE_ _ --- --- 350
340
LU
z _ _ _ `1 _ _ _ _ <1 330 GRAPHIC SCALE
J--- --- --- ----
- - - - - - - - - - - - - -
--- -_-_-_ --- -_-_-_ ---_ _--_ --- ---_ --- -_-- 320 PROGRESS
--- --- ---_ ------ --- `1-- ---_ --- IN FEET
310 HORIZONTAL: 1"=300' MAYO STEAM ELECTRIC PLANT
--- ---_ ---_ ---- --- 10660 BOSTON RD
--- --- ---- ---- ---
300 - - - - - - - - - - - - - - - 300 30 0 30 60 ROXBORO, NORTH CAROLINA
O O O O O O O O O O O O O O O O
O O O O O O O O O O O O O O O O
+ + + + + + + + + + + + + + + + IN FEET
00 M O N CO � (0� 00 M O FIGURE 11-5a
00 00 00 00 00 00 00 00 00 M
NORTHEAST VERTICAL:1"=30' GEOLOGIC CROSS SECTION B-B'
SECTION B-B' - COBALT NOTE: 10:1 VERTICAL EXAGGERATION
FACING NORTHWEST WITH COBALT

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0'-2': Sb<6.5/As<6.5/Ba72.9/B<16.3/Cr6.1/Co<6.5/Fe19600/Mn82.8/TI<6.5/V32.4
52'-54': Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/Co6.6/Fe10400/Mn789/TI<5.1/V13.1
ABMW-02/ 02BR
ABMW-02: pH 7.8 / Sb <1 / As 1020 / Ba 173 / B 9200 / Cr(VI) 0.017 / Co <1 / Fe 356 / Mn 1110 / TI <0.2 / TDS 450 / V 3.53
ABMW-02BR: pH 7.2 / Sb <1 / As <1 / Ba 159 / B <50 / Cr(VI) 0.007 / Co <1 / Fe 107 / Mn 149 / TI <0.2 / TDS 370 / V 0.873
45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
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MW-07D: pH 6.4 / Sb <1 / As <1 / Ba 24 / B <50 / Cr(VI) NS / Co <1 / Fe 69 / Mn 188 / TI <0.2 / TDS 390 / V 0.798
MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 540
MW-08S/ 08D/ 08BR
530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb <2.7 / As <2.7 Ba 130 B <53.1 Cr 67.1 Co 7.4 Fe 11400 Mn 875 / TI <2.7 / V 25.2
SECTION C-C' - COBALT
FACING NORTH
510
500
490
w
Q J
a�
TLIJ
LU
Z_
J
U
Q
400
'Coll"
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
V WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR COBALT IS 1 fag/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-513
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-5b
GEOLOGIC CROSS SECTION C-C'
WITH COBALT

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1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6 FACING NORTHWEST
4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
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pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 / TDS 370 / V 5.88
470
CW-211):
pH6.1/Sb<1/As<1/Ba38/B363/Cr(VI)0.084/Co<1/Fe278/Mn81/TI<0.2/TDS250/V0.585
77 460
460
Q MW-16S/ 16D/ 16BR
50
Q MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
4 0
L1J MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
Q 1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
43
J 23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4
420
33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/TI<7.5/V16.3
Q 54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87
410
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NORTHEAST
SECTION B-B' - IRON
FACING NORTHWEST
620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
470
460
450
440
430
420
410
400
390
LU
LU
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LU
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Q
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TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
2J
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR IRON IS 300 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-6A
(� DUKE
� ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-6a
GEOLOGIC CROSS SECTION B-B'
WITH IRON

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0'-2': Sb<6.5/As<6.5/Ba72.9/B<16.3/Cr6.1/Co<6.5/Fe19600/Mn82.8/TI<6.5/V32.4
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ABMW-02BR: pH 7.2 / Sb <1 / As <1 / Ba 159 / B <50 / Cr(VI) 0.007 / Co <1 / Fe 107 / Mn 149 / TI <0.2 / TDS 370 / V 0.873
45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
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MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 7FTT7 540
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520 w 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
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SECTION C-C' - IRON
FACING NORTH
510
500
490
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400
390
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
w WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR IRON IS 300 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-613
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-6b
GEOLOGIC CROSS SECTION C-C'
WITH IRON

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440
430
420
410
400
390
380
370
360
350
340
330
320
310
300
NONE
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S113-7 SECTION B-B' - MANGANESE
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4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
MW-3
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CW-2/ 2D
470
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CW-2D: pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460
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50
MW-16S/ 16D/ 16BR
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4 0
Q
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of
MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
43
w
Y
1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J
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420
p
33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/TI<7.5/V16.3
Q
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410
�
400
Q 400
J
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390
L j
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NORTHEAST
SECTION
B-B' - MANGANESE
FACING NORTHWEST
FACING NORTHWEST
620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
470
460
450
440
430
420
410
400
390
W
CO
LU
CO
LLI
-
Z_
J
U
Q
COAL ASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
2J
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR MANGANESE IS 50 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-7A
(� DUKE
� ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-7a
GEOLOGIC CROSS SECTION B-B'
WITH MANGANESE

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0
MW-13BR
MW-13BR: pH7.2/Sb<1/As<1/Ba40/B<50/Cr(VI)0.005/Col.19/Fe1130/Mn474/TI<0.2/TDS370/V0.381
0'-2': Sb<6.5/As<6.5/Ba72.9/B<16.3/Cr6.1/Co<6.5/Fe19600/Mn82.8/TI<6.5/V32.4
52'-54': Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/Co6.6/Fe10400/Mn789/TI<5.1/V13.1
ABMW-02/ 02BR
ABMW-02: pH 7.8 / Sb <1 / As 1020 / Ba 173 / B 9200 / Cr(VI) 0.017 / Co <1 / Fe 356 / Mn 1110 / TI <0.2 / TDS 450 / V 3.53
ABMW-02BR: pH 7.2 / Sb <1 / As <1 / Ba 159 / B <50 / Cr(VI) 0.007 / Co <1 / Fe 107 / Mn 149 / TI <0.2 / TDS 370 / V 0.873
45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
ABMW-03/ 03S
BMV' mm.
1 6
in
uWM
ROOM 11IN
ago
b Few
111104
0
s
y
MW-07D/ 07BR
MW-07D: pH 6.4 / Sb <1 / As <1 / Ba 24 / B <50 / Cr(VI) NS / Co <1 / Fe 69 / Mn 188 / TI <0.2 / TDS 390 / V 0.798
MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 540
MW-08S/ 08D/ 08BR
530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb <2.7 / As <2.7 Ba 130 B <53.1 Cr 67.1 Co 7.4 Fe 11400 Mn 875 / TI <2.7 / V 25.2
WE
SECTION C-C' - MANGANESE
FACING NORTH
510
500
490
ED&
'Coll"
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR MANGANESE IS 50 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-713
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-7b
GEOLOGIC CROSS SECTION C-C'
WITH MANGANESE

1 0t'%0A1r%
U0
W
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Q
W
U
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75
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w
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75
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14
LO
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N
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620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
ow 470
M�
aa) 460
w=
450
440
430
420
410
400
390
380
370
360
350
340
330
320
310
300
IN
illlliiiiiii
MENNEN
FIRM
NOW
NMI
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O OD
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O
O N M d co ti M O N M ,I-LO CO I- CO O O �- N CO LO (D � 00 M CD M "I -LC) co ti co O �- N M � Ln CO f� M M O N M d Lo CO fl- M O CD M ,I- LO CO I- M M CDN M 'z Lo
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SOUTHWEST
Station
(feet)
S113-7 SECTION B-B' - THALLIUM
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6
4.5'-7.5':Sb<6/As<6/13a15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
MW-3
MW-3: pH5.71/Sb<1/As<1/Ba56/B847/Cr(VI)0.155/Co<1/Fe34/Mn880/TI<0.2/TDS190/V<0.3
CW-2/ 2D
470
1 1 1 1 1
CW-2: pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 /TDS 370 / V 5.88
CW-211): pH 6.1
/ Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460
460
a)
50
MW-16S/ 16D/ 16BR
p
MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
4 0
a0
MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
Of
MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
43
w
Y
1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J
23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4
420
p
33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/TI<7.5/V16.3
Q
54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87
410
400
0 400
J
w
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w
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__ 330
320
--- ---
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<0.2- ---
310
310
300
- - - - - - 300
O O O
O O CDO
O O O
O O
O O O O O O O O O O
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rl- 00 00
00 0o 00 00 00 00 00 0o O O
NORTHEAST
SECTION
B-B' - THALLIUM
FACING NORTHWEST
FACING NORTHWEST
620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
470
460
450
440
430
420
410
400
390
W
CO
LLI
CO
LLI
-
Z_
J
U
Q
Cff
COAL ASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
.2u)
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR THALLIUM IS 0.2 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-8A
DUKE
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-8a
GEOLOGIC CROSS SECTION B-B'
WITH THALLIUM

N
O
v
L0
1-1
N
04
I
MW-13BR: pH7.2/Sb<I/As<1/Ba 40 / B <50 / Cr(VI) 0.005 / Co 1.19 / Fe 1130/ Mn 474/ TI<0.2/ TDS 370/ V 0.381
O'-2':Sb<6.5/As<6.5/Ba 72.9 / B <16.3 / Cr 6.1/Co<6.5/Fe 196M Mn 82.8 /TI<6.5/V 32.4
52'-54':Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/C.6.6/Fe 10400/Mn 789 /TI<5.1/V 13.1
ABMW-02: pH7.8/Sb<1/As 1020/Ba 173/B 9200/Cr(VI)0.017/Co<I/Fe 356/ Mn 1110/ TI <0.2/ TD5450/ V 3.53
ABMW-02BR: pH7.2/5b<S/As<1/Ba 159/B<50/Cr(VI)0.007/Co<I/Fe 107/Mn 149/TI<0.2/ TDS 370/ V 0.873
45'-45.5':5b<6/As<6/Ba 92.2 / B <15 / Cr 8 / Co 6 j / Fe 18300/ Mn 579/ TI<6/ V 30.3
57.5'-58': 5b<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
ABMW-03: pH6.63/5b<1/As 193/Ba 2W/B 1940/Cr(VI)<OAW/Co<1/Fe 3890/ Mn 451/ TI 0.289/ TD5350/ V 0.68
CABMW-01 ABMW-03S: pHI.21/5b<l/A 1.04/Ba25/BIIOO/Cr(VI)<0.005/Co3.98/Fe2630/Mn478/TI<0.2/TD511G/V<0.3 CW-01
550 v�i ABMW-01: pH7.6/Sb38/As518/Ba925/B4560/Cr(VI)NS/[ 6.09/Fe1370/Mn2280/TI2.47/TOS540/V 314 51'-53':Sb<6.8/As<6.8/Ba56.1/B<17/Cr1.3j/Cob.6j/Fe16900/Mn319/TI<6.8/V28.8 CW-01: CW-01:pH5.5/5b<3/As<S/Ba<5/B<50/CrjVIjNS/Co<1/Fe31/Mn6/TI<0.2/TD5150/V0.543
Z 1'-1.5':5b<8.7/As16.6/Ba15D/B27.4/Cr25/Co7.6j/Fe2240/Mn18.4/TI<8.7/V39.3 CW-01 D: pH6.8/Sb<3/As<1/Ba<5/B<50/CrvI)NS/Co<1/Fe<10/Mn<5/TI<0.2/TD5200/V 1.09
540 OF= 11.5'-12%Sb<7.8/As 26.2/Ba 152/B27.4/Cr26.9/Co8.3/ Fe 2710/ Mn 31.3/ TI<7.8/ V 46.2
wo w 13'-13.5':Sb<6.2/As<6.2/Ba53.8/8<15.5/Cr3.7/Co<6.2/ Fe 8770/ Mn 92.2/ TI<6.2/V 11.9 Q
530 m aMW-096R
MW-09BR: pH6.3/Sb<llAs</Ba 30/B<50/Dr(VI)NS/Co<1/Fe 3000/Min 809/ TI<0.2 / TDS 220/ V 4.17
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MW-07ER: pH7.4/5b<1/As<1/Ba 140/B<50/Cr(VI)NS/Co<I/ Fe 339/ Mn 263/ TI<0.2/ TDS 270/ V<0.3 C'
550 P-2':Sb<5.1/As<5.1/Ba21.5/B<12.9/Cr4.1/Co<5.1/ Fe 7320/ Mn 27.7/ TI<5.1/ V 12.8 550
540 540
MW-08S/ OBDI 08BR
530 p MW-08BR: pH6.56/Sb<1/As<I/Ba 66/B<50/Cr(V0 N5/Co</Fe 2200/ Mn 2680/ TI<0.2/ TDS 550 V<0.3
O 0.75'-1.25':Sb<3.2/As<3.2/Ba147/B<63.4/Cr62.2/Co21.3/Fe24700/Mn1230/TI<3.2/V50.6
520 25.5'-26':Sb<2.7/As<2.7/Ba193/B33j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb<2.7 As<2.7 Ba130 B<53.1 Cr67.1 Co7.4 Fe1140D Mn875/TI<2.7/V25.2
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SECTION C-C' - THALLIUM
FACING NORTH
300
30
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
LEGEND
_ COAL ASH
_ TRANSITION ZONE
BEDROCK
SOIL/FILL
© SAPROLITE
® ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHEREINFERRED
--�--r� HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
• SURFICIAL WATER LEVEL
• TRANSITION ZONE WATER LEVEL
• BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES:
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF GARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOILAND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE:
1. CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR THALLIUM IS 0.2 pg/L.
I VT
s)mTerm
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/
CHECKED BY: J. WYLIE DATE: 8/5/
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-8B
'DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-8b
GEOLOGIC CROSS SECTION C-C'
WITH THALLIUM

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440
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380
370
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350
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310
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+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O N M d co r'- M O CD- N M ,I-LO CO r- CO O O �- N CO � LO (D r-- 00 M CD- N M "I-LO co ti co O �- N M � Ln CO r` M M O N M -' Lo CO r1- M O CD- N M ,I- LO CO r'-M M CD M 'z Lo
•- - - - - - - c- N N N N N N N N N N co co M M co co co co M M It" It I- dt It It cp It IT U') LO LO LO LO LO LO LO LO LO Co Co Co (0 (0 Co Co Co Co (0 r- ti r- I� ti r-
SOUTHWEST
Station
(feet)
SB-7 SECTION B-B' - TDS
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6 FACING NORTHWEST
4.5'-7.5': Sb <6 / As <6 / Ba 15.5 / B <15 / Cr 8.2 / Co <6 / Fe 6040 / Mn 226 / TI <6 / V 8.2
MW-3
MW-3:pH5.71/Sb<1/As<1/Ba56/B847/Cr(VI)0.155/Co<1/Fe34/Mn880/TI<0.2/TDS190/V<0.3
CW-2/
2D
1
1 1 1CW-2:
pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 / TDS 370 / V 5.88
470
CW-2D:
pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
1111111111111460 N
HIMMIMMI
460
11142
MW-16S/ 16D/ 16BR
50
p MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
40
of MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
43
w Y 1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J 23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4
p 33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/TI<7.5/V16.3
420
Q 54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87
410
400
77 1�
p 400
J
w
390
390
w
__
W
Q 380
LU
Um
=
370 370
(n
-
_ 100 360
2
-
~
---
350
LU
---
340
-250- - 160
_
---
---
--- 330
---- ---- ---320
---
---
---
----
170- ---
___
310
310
-
-
- - - - 300
300
O O O
O O CDO
O O O O O O O O O O O O O
O CDO O O O CD O O CD CD
+ + +
CO r1- 00
+ + + + + + + + + + + + +
O O N CO � LO co r-- 00 M CDf�
ti r--
co 00 00 co 00 00 00 00 00 00 O O
NORTHEAST
SECTION B-B' -TDS
FACING NORTHWEST
620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
470
460
450
440
430
420
410
400
390
W
LU
3E
CO
CO
LLI
-
Z_
J
U
Q
ICOALASH
TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
.2u)
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR TDS IS 500 mg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-9A
(� DUKE
� ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-9a
GEOLOGIC CROSS SECTION B-B'
WITH TDS

I 0t'%0A1r%
tiA
LU
n,
C�
Q
W
U
O
Q
U)
a)
YaA
IL
1a0
O
0-
0)
a
W
U
rl
/
C6
n
0)
E
U)
0)
U)
Cn
a
0
Cn
M
m
Cn
a
0
I6
O
/
N
O
vi
U)
a)
w
0
n
E.
a)
w
0
/
WE
7
LO
O
N
00
N
0
MW-13BR
MW-13BR: pH7.2/Sb<1/As<1/Ba40/B<50/Cr(VI)0.005/Col.19/Fe1130/Mn474/TI<0.2/TDS370/V0.381
0'-2': Sb<6.5/As<6.5/Ba72.9/B<16.3/Cr6.1/Co<6.5/Fe19600/Mn82.8/TI<6.5/V32.4
52'-54': Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/Co6.6/Fe10400/Mn789/TI<5.1/V13.1
ABMW-02/ 02BR
ABMW-02: pH 7.8 / Sb <1 / As 1020 / Ba 173 / B 9200 / Cr(VI) 0.017 / Co <1 / Fe 356 / Mn 1110 / TI <0.2 / TDS 450 / V 3.53
ABMW-02BR: pH 7.2 / Sb <1 / As <1 / Ba 159 / B <50 / Cr(VI) 0.007 / Co <1 / Fe 107 / Mn 149 / TI <0.2 / TDS 370 / V 0.873
45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
ABMW-03/ 03S
BMV' mm.
1 6
in
u
PA
dpp WON
WEI
al
s
y
MW-07D/ 07BR
MW-07D: pH 6.4 / Sb <1 / As <1 / Ba 24 / B <50 / Cr(VI) NS / Co <1 / Fe 69 / Mn 188 / TI <0.2 / TDS 390 / V 0.798
MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
�4540 540
MW-08S/ 08D/ 08BR
530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
30.5'-31': Sb <2.7 / As <2.7 Ba 130 B <53.1 Cr 67.1 Co 7.4 Fe 11400 Mn 875 / TI <2.7 / V 25.2
EM
ML
MINE
SECTION C-C' - TDS
FACING NORTH
510
500
490
ED
'Coll"
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. 2L VALUE FOR TDS IS 500 mg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-913
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-9b
GEOLOGIC CROSS SECTION C-C'
WITH TDS

1 0t'%0A1r%
1aA
v7
LU
n,
C�
L7
Q
W
U
O
Q
a�
1a0
IL
1aA
O
0-
(3)
CC
a
W
U
�i
/
C6
0
E
U)
0
U)
Cn
a
0
Cn
M
m
Cn
Q
0
('3
L6
O
/
O
N
O
vi
U)
N
w
0
n
E.
a�
LU
(D
0
/
.E
7
LO
O
LO
O
N
00
N
0
620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
ow 470
M�
aa) 460
w=
450
440
430
420
410
400
390
380
370
360
350
340
330
320
310
300
ILI
IN
a-
92
1
ANN
11
Imes
-
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O OD
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
O N M d co r'- M O CD- N M ,I-LO CO r- CO O O �- N CO � LO (D r-- co M CD- N M "I-LO Cfl rl- co O �- N M � Ln CO r` M M O N M -' Lo CO rl- M O CD- N M ,I- LO (fl r- M M CD N M 'z LID
•- - - - - - - c- N N N N N N N N N N co co M M co co co co M M It" It I- dt It It cp It IT U') LID LO LO LO LO LO LID LO LO CO CO CO (0 (0 CO CO CO (0 (0 r- rl-r- rl- rl-r-
SOUTHWEST
Station
(feet)
SB-7 SECTION B-B' - VANADIUM
1'-2': Sb <5.8 / As <5.8 / Ba 68.8 / B <14.5 / Cr 11.4 / Co 5.9 / Fe 9460 / Mn 693 / TI <5.8 / V 17.6 FACING NORTHWEST
4.5'-7.5':Sb<6/As<6/Ba15.5/B<15/Cr8.2/Co<6/Fe6040/Mn226/TI<6/V8.2
MW-3
MW-3:pH5.71/Sb<1/As<1/Ba56/B847/Cr(VI)0.155/Co<1/Fe34/Mn880/TI<0.2/TDS 190/V<0.3
CW-2/ 2D
470
1
CW-2: pH 6.5 / Sb <1 / As <1 / Ba 54 / B 804 / Cr(VI) <0.021 / Co <1 / Fe 467 / Mn 135 / TI <0.2 / TDS 370 / V 5.88
CW-211): pH 6.1 / Sb <1 / As <1 / Ba 38 / B 363 / Cr(VI) 0.084 / Co <1 / Fe 278 / Mn 81 / TI <0.2 / TDS 250 / V 0.585
460
460 N 42
50
MW-16S/ 16D/ 16BR
p
MW-16S: pH 6.02 / Sb <1 / As <1 / Ba 46 / B <50 / Cr(VI) 0.011 / Co 4.32 / Fe 860 / Mn 260 / TI <0.2 / TDS 100 / V 0.303
4 0
a0
MW-16D: pH7.1/Sb<1/As<1/Ba13/B<50/Cr(VI)0.051/Co<1/Fe87/Mn269/TI<0.2/TDS160/V0.617
of
MW-16BR: pH8.67/Sb<1/As2.05/Ba11/B<50/Cr(VI)0.017/Co<1/Fe80/Mn30/TI<0.2/TDS170/V2.79
43
w
Y
1'-2':Sb<6.5/As<6.5/Ba95.4/B<16.2/Cr7.6/Co6j/Fe7710/Mn1250/TI<6.5/V17.3
J
23'-24': Sb<5/As<5/Ba28.2/B10j/Cr2.1/Co4.6j/Fe10600/Mn885/TI<5/V8.4
420
0
33'-35':Sb<7.5/As<7.5/Ba131/B16.8j/Cr9.2/Co12/Fe19100/Mn1630/A<7.5/V16.3
Q
54.5'-55.5': Sb <5.2 / As <5.2 / Ba 237 / B 32.3 / Cr 37.2 / Co 19.6 / Fe 38300 / Mn 1010 / TI <5.2 / V 87
410
400
0 400
J
LU
390
w
390
W
U)
380
LU
'
Q
<
5.88
U °0 370
CO
<0.3
3 ., \
0_
-
Cn
-
0.303 360
~
---
- 350
LU
---
340
J
--- ---
0.585-
Q A
---
---
330
---
14:
---
---
--- --- 320
---
---
---__
--- ---
2.79- ---
310
310
300
-
-
- - - - 300
CD O
O O
CDO O
CDO O
CDO O CDO O CDO CDO O
CDO O O O CD O O CD CD
+ +
CO rl-
+ + +
00 O O
+ + + + + + + + + + +
N CO � LO O r-- 00 O O
f�
ti rl- 00
00 00 0o 00 00 00 00 00 00 O O
NORTHEAST
SECTION B-B' - VANADIUM
FACING NORTHWEST
620
610
600
590
580
570
560
550
540
530
520
510
500
490
480
470
460
450
440
430
420
410
400
390
W
LU
3E
CO
CO
LU
-
Z_
J
U
Q
COAL ASH
TRANSITION ZONE
- - - - BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
2J
FRACTURED/OXIDIZED ZONE
m
OBSERVED IN ROCK CORE
w`
NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
GRAPHIC SCALE
0 300
IN FEET
HORIZONTAL: 1"=300'
0 30
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.
1. THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR VANADIUM IS 0.3 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-10A
(� DUKE
� ENERGY
PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
ROXBORO, NORTH CAROLINA
FIGURE 11-10a
GEOLOGIC CROSS SECTION B-B'
WITH VANADIUM

I 0t'%0A1r%
tiA
LU
n,
C�
Q
W
U
O
Q
U)
a)
YaA
IL
1a0
O
0-
0)
a
W
U
rl
/
C6
n
0)
E
U)
0)
U)
Cn
a
0
Cn
M
m
Cn
a
0
I6
O
/
N
O
vi
U)
a)
w
0
n
E.
a)
w
0
/
WE
7
LO
O
N
00
N
0
MW-13BR
MW-13BR: pH7.2/Sb<1/As<1/Ba40/B<50/Cr(VI)0.005/Col.19/Fe1130/Mn474/TI<0.2/TDS370/V0.381
0'-2': Sb<6.5/As<6.5/Ba72.9/B<16.3/Cr6.1/Co<6.5/Fe19600/Mn82.8/TI<6.5/V32.4
52'-54': Sb<5.1/As<5.1/Ba62.3/B<2.5/Cr9.2/Co6.6/Fe10400/Mn789/TI<5.1/V13.1
ABMW-02/ 02BR
ABMW-02: pH 7.8 / Sb <1 / As 1020 / Ba 173 / B 9200 / Cr(VI) 0.017 / Co <1 / Fe 356 / Mn 1110 / TI <0.2 / TDS 450 / V 3.53
ABMW-02BR: pH 7.2 / Sb <1 / As <1 / Ba 159 / B <50 / Cr(VI) 0.007 / Co <1 / Fe 107 / Mn 149 / TI <0.2 / TDS 370 / V 0.873
45'-45.5': Sb<6/As<6/Ba92.2/B<15/Cr8/Co6j/Fe18300/Mn579/TI<6/V30.3
57.5'-58': Sb<5.1/As<5.1/Ba41.2/B<12.8/Cr56.7/Co37.4/Fe43400/Mn782/TI<5.1/V84.9
ABMW-03/ 03S
BMV' mm.
1 6
in
u
oil
0102
waft..- rig
-.agog M'al
IBM d
s
y
MW-07D/ 07BR
MW-07D: pH 6.4 / Sb <1 / As <1 / Ba 24 / B <50 / Cr(VI) NS / Co <1 / Fe 69 / Mn 188 / TI <0.2 / TDS 390 / V 0.798
MW-07BR: pH 7.4 / Sb <1 / As <1 / Ba 140 / B <50 / Cr(VI) NS / Co <1 / Fe 339 / Mn 263 / TI <0.2 / TDS 270 / V <0.3 C 1
550 1'-2': Sb<5.1/As<5.1/Ba21.5/B<12.8/Cr4.1/Co<5.1/Fe7320/Mn27.7/TI<5.1/V12.8 550
540 540
MW-08S/ 08D/ 08BR
530 p MW-08BR: pH 6.56 / Sb <1 / As <1 / Ba 66 / B <50 / Cr(VI) NS / Co <1 / Fe 2200 / Mn 2680 / TI <0.2 / TDS 550 / V <0.3
a0 0.75'-1.25': Sb <3.2 / As <3.2 / Ba 147 / B <63.4 / Cr 62.2 / Co 21.3 / Fe 24700 / Mn 1230 / TI <3.2 / V 50.6
520 25.5'-26': Sb<2.7/As<2.7/Ba193/B31j/Cr419/Co32.9/Fe31300/Mn933/TI<2.7/V75.8
Sb <2.7 / As <2.7 Ba 130 B <53.1 Cr 67.1 Co 7.4 Fe 11400 Mn 875 / TI <2.7 / V 25.2
1111
SECTION C-C' - VANADIUM
FACING NORTH
510
500
490
ED
'Coll"
380
370
360
GRAPHIC SCALE
300 0 300
IN FEET
HORIZONTAL: 1"=300'
30 0 30
ICOALASH
TRANSITION ZONE
BEDROCK
SOIL/FILL
SAPROLITE
ALLUVIUM
CONCENTRATION CONTOUR
CONCENTRATION CONTOURS
DASHED WHERE INFERRED
HASH MARKS POINT TO
DECREASING CONCENTRATIONS
V WATER LEVEL (JUNE 17, 2015)
SURFICIAL WATER LEVEL
TRANSITION ZONE WATER LEVEL
BEDROCK WATER LEVEL
FRACTURED/OXIDIZED ZONE
OBSERVED IN ROCK CORE
NS NOT SAMPLED
ABMW-02BR: WATER ANALYTICAL RESULTS IN pg/L
45'-45.5' SOIL TOTAL ANALYTICAL RESULTS IN mg/kg
BORING SYMBOLS
SOIL SAMPLE
WELL SCREEN WITH
CONCENTRATION
(micrograms per liter)
SOURCES.-
1 THE TOPOGRAPHY SURVEY DATA WITHIN THE PROPERTY
BOUNDARY DATED MAY 19, 2015 WAS OBTAINED FROM
WSP OF CARY, NORTH CAROLINA.
2. SELECT TOPOGRAPHIC ADJUSTMENTS BASED ON SITE SURVEY
AND COMPARISON TO AERIAL PHOTOGRAPH.
3. 2015 LITHOLOGY INFORMATION OF SOIL AND WELL LOG
TOPOGRAPHY IS FROM SYNTERRA.
4. GEOLOGIC INFORMATION FOR BORINGS AND MONITORING WELLS
INSTALLED PRIOR TO 2015 TAKEN FROM S&ME (2010) AND
QUANTEX (2008).
NOTE.-
1 . CROSS SECTION LOCATIONS SHOWN ON FIGURE 2-1.
2. WATER LEVELS WERE COLLECTED BY SYNTERRA ON
JUNE 17, 2015.
3. IMAC VALUE FOR VANADIUM IS 0.3 pg/L.
erra
148 River Street, Suite 220
Greenville, South Carolina 29601
864-421-9999
www.synterracorp.com
DRAWN BY: C. NEWELL DATE: 8/5/2015
CHECKED BY: J. WYLIE DATE: 8/5/2015
PROJECT MANAGER: K. WEBB
LAYOUT NAME: FIGURE 11-10B
DUKE
ENERGY
boo PROGRESS
MAYO STEAM ELECTRIC PLANT
10660 BOSTON RD
60 ROXBORO, NORTH CAROLINA
IN FEET
VERTICAL: 1"=30'
NOTE: 10:1 VERTICAL EXAGGERATION
FIGURE 11-10b
GEOLOGIC CROSS SECTION C-C'
WITH VANADIUM

Primary Sources Secondary Sources Exposure Medium Exposure Route I Current Land Use (Hypothetical Future Land Use
Primary Release Mechanisms
Active Ash Basin
Secondary Release Mechanisms
Seeps to Crutchfield Branch
Secondary Release/Exposure Routes
Note 1: Evaluation of potential human health risks to off -site residents will be conducted based upon
results of ongoing groundwater contaminant fate and transport modeling.
Note 2: Would include consumption of fish, as applicable.
Active Ash Basin
jPotential Human Receptors
• Potentially Complete Exposure Pathway
Incomplete Exposure Pathway
TOE
Drain
NPDES
Discharge
Seeps Soil
Groundwater I POP Mayo Lake
nent
Ingestion
Soil Dermal
Inhalation
Ingestion Note 2
Cruchfield TSurface Water Dermal
Branch Inhalation
Ingestion
Sediment Dermal
Inhalation
Ingestion
Groundwater -----1110 Dermal
Inhalation
Qj
4
w
I?..
d
0
^o
Q
v
o
Z
4
w
y
x
3
U
d
v
d
0
a
a
o
..
s
c
u
y
o
..
n
•..
a
d
ro
o
..
0
..
ro
0
..
d
o
o
o
a
z~.
I&T
synTerm
148 River Street, Suite 220
Greenville, SC 29601
Phone: [phone]
E
Figure 12-1
Human Health
Conceptual Exposure Model
Mayo Steam Plant
Roxboro, North Carolina
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Figures\Figure 12-1 Mayo CEM.xlsx8/31/2015

A
4
- - - .
•
•
--
SR.• .ems
Ilk
2
-V
ABMW-03
As
B
Fe '
Mn
TI
V
AsJr
B ' r
CoFe
1� 4.
ADS i,lag
V r—
Rr�� .. -..
IL
'98,
LANDFILL
--- t/♦ram♦- 1
r�
r♦
I
'A .+
*�- MAYO
•` LAKE
16
:A4 •
s
� Y 1
{ *14
•�
♦
"
4r
1D
LEGEND
NC2L OR IMAC EXCEEDANCE - BOLDED IF COAL ASH COPC3
(SEE TABLES 12-1 AND 12-2)1'2
ii?� MONITORING WELL
DITCH
STREAM
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
Antimony
Sb
Arsenic
As
Barium
Ba
Boron
B
Cobalt
Cc
Iron
Fe
Manganese
Mn
Thallium
TI
Total Dissolved Solids
TDS
Vanadium
V
NOTES:
1 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 CONSTITUENTS IDENTIFIED AS A SITE SPECIFIC CONSTITUENT OF POTENTIAL
CONCERN(COPC).
4 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http //services nconemap govl
6 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD83/2011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
DUKE o
U
syn
Terra
' ENERGY
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-2
COPC LOCATIONS FLAGGED
GROUNDWATER - ASH PORE WATER
HUMAN HEALTH

N------------- /t-•---- -----------------
I
I
\• J SR-1501.
4
AL.-
94I,
li a
MW-16S
pH
R,
i
b-
�
ao
1 �V
✓a�'s
♦
v+ram♦- 1
I'
�- MAYO
LAKE
r ram''♦
.
.#JAW
1 -• 1
Jr �
>v
r 3" + �+
+
fr'
ICE l
LEGEND
NC2L OR IMAC EXCEEDANCE - BOLDED IF COAL ASH COPC3
(SEE TABLES 12-2 AND 12-4)1•2
ii?� MONITORING WELL
DITCH
> STREAM
ASH BASIN BOUNDARY
- _ ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
pH
pH
Boron
B
Cobalt
Co
Iron
Fe
Manganese
Mn
Vanadium
V
NOTES:
1 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 CONSTITUENTS IDENTIFIED AS A SITE SPECIFIC CONSTITUENT OF POTENTIAL
CONCERN(COPC).
I SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. T WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
6 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
`=- DUKE
synTerra E N E RGY
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864-421-9999 ROXBORO, NORTH CAROLINA 27574
www.synterracorp.com
FIGURE 12-3
COPC LOCATIONS FLAGGED
GROUNDWATER - ALLUVIAL
HUMAN HEALTH

•
•
...... ......
�.,/ • .ems
SR15p, I►
♦
�yo)
J
'A .+
*�- MAYO
�` LAKE
44
�.°� ram''♦
r
1 -• 1
�
all
111111
y
J
LEGEND
NC2L OR IMAC EXCEEDANCE - BOLDED IF COAL ASH COPC3
(SEE TABLES 12-2 AND 12-5)1,2
ii?� MONITORING WELL
DITCH
STREAM
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
pH
pH
Boron
B
Cobalt
Co
Iron
Fe
Manganese
Mn
NOTES:
1 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 CONSTITUENTS IDENTIFIED AS A SITE SPECIFIC CONSTITUENT OF POTENTIAL
CONCERN(COPC).
4 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
6 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 11200 1,600 2,000
IN FEET
10 4ft� DUKE ENERGY
syn
Terra 3
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT w
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-4
COPC LOCATIONS FLAGGED
GROUNDWATER - SAPROLITE
HUMAN HEALTH

— / /y • MW-16D
• rj / Mn
•
•
CW-03
pH
V ► SR 1501. • . ! ,
Ilk
CW-02
pH
- B
A
4
1►
-V
CW-01
pH y
Fe
V
'r 7
MW-07D _♦
pH
Mn
81 V
)FILL
J
.�J
'A .+
MAYO
•" � LAKE
•
s
LEGEND
NC2L OR IMAC EXCEEDANCE - BOLDED IF COAL ASH COPC3
(SEE TABLES 12-2 AND 12-6)1'2
ii?� MONITORING WELL
DITCH
STREAM
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
pH
pH
Antimony
Sb
Arsenic
As
Barium
Ba
Boron
B
Cobalt
Cc
Iron
Fe
Manganese
Mn
Total Dissolved Solids
TDS
Vanadium
V
NOTES:
1 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 CONSTITUENTS IDENTIFIED AS A SITE SPECIFIC CONSTITUENT OF POTENTIAL
CONCERN(COPC).
4 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
6 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
4*�DUKE
ENERGY'----,-
synTerra
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-5
COPC LOCATIONS FLAGGED
GROUNDWATER - TRANSITION ZONE
HUMAN HEALTH

CW-05
Fe
Mn
MW-05BR
Fe
Mn
4
i
MW-13BR
Co
Fe
Mn
\ o�
T II
r
ye
• + )
,
r-•✓ l
♦ o
------------- LEGEND
&WOmi
MW-16BR
"W
pH NC2L OR IMAC EXCEEDANCE - BOLDED IF COAL ASH COPC3
V (SEE TABLES 12-2 AND 12-7)1•2
CW-04 MONITORING WELL
H _ —� — - DITCH
V
p MW-03BR` STREAM
Fe `. �' ,� ASH BASIN BOUNDARY
Mn ' SR- 15p1' I► _ < 1•� ASH BASIN COMPLIANCE BOUNDARY
TDS - - -r - ' -�� DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
V
ABMW-02BR
Mn
V
A
ABMW-04BR
Fe
Mn
V
J
FTDS
MW-04
pH
V
CW-01 D
V
+ r
MW-07BR
♦
MW-08BR
Fe
Cr(Total)
Mn
Co
pr,
Fe
Mn
TDS
V
MW-096R
pH _
Fe
Mn ...%
V `+
'A .+
*�- MAYO
` LAKE
1 1
it ' � ♦ . r--s
r �1
i
fr'
Constituent Full Name
Constituent Abbreviation
pH
pH
Chromium
Cr(Total)
Cobalt
Co
Iron
Fe
Manganese
Mn
Total Dissolved Solids
TDS
Vanadium
V
NOTES:
1 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 CONSTITUENTS IDENTIFIED AS A SITE SPECIFIC CONSTITUENT OF POTENTIAL
CONCERN(COPC).
I SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. T WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
6 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1200 1600 2,000
IN FEET
LT 4ft� D U KE
synTerra
ENERGY
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-6
COPC LOCATIONS FLAGGED
GROUNDWATER - BEDROCK
HUMAN HEALTH

• +Jy
SB-01 Y..
As
Co
Fe
It
MW-03BR
Co ; A
Fe
Mn
A BR
All
- AI
C Co
o
Fe MW-16BR
CoCo
_l1k
Mn
SB-07
All
Co
Fe
Mn
MW-13BR r
All ABMW-01
` Fe As
ABMW-011
As
� Co
♦ Y '1
T + ♦
• SB_02 I
iI All
+ . As
• + Co
ye •
o Fe
i ) Mn
/s V
MW-11 BR
� + All -
Co
+/ Fe
..
r-•✓ l
♦ o
MW-12D
♦, ' ..'�'♦ As
MW-12D
AI
I Fe
"
♦ 1
SB-06
SB-05
As
Co
Fe
Mn
7 I �
♦
MW-07BR MW-08BR L
I
Fe All
Co
Fe
Mn
V
.-
+
)0- D
l ..
[J� /0"11 2
6 r• ,
LEGEND
EPA R4 REGIONAL INDUSTRIAL SOIL SCREENING LEVEL EXCEEDANCE -
BOLDED IF COAL ASH COPC (SEE TABLES 12-2 AND 12-8)1
EPA R4 REGIONAL RESIDENTIAL SOIL SCREENING LEVEL EXCEEDANCE -
BOLDED IF COAL ASH COPC (SEE TABLES 12-2 AND 12-8)1
io�
MONITORING WELL
SOIL BORING
DITCH
STREAM
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
Aluminum
Al
Arsenic
As
Cobalt
Co
Iron
Fe
Manganese
Mn
Vanadium
V
NOTES:
1 USEPA. REGIONAL SCREENING LEVELS FOR CHEMICAL CONTAMINANTSAT
SUPERFUND SITES. ACCESSED 07/26/2015.
(http://www.epa.gov/reg3hwmd/risk/human/rb-concentration table/Generic-Tables/index.htm)
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS' (IMAC).
3 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
4 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
5 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
6 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
10 DUKE
synTerra ENERGY
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-7
COPC LOCATIONS FLAGGED
SOILS (0-2 FEET) - HUMAN HEALTH

4
.�.�'—..—..—..--. S-04 SW-CB2
As Co
Fe IF
Fe �.
Mn
S 04
SW-CB1 ►
CO As Co
- ,- Fe Co
Yr _ Mn Fe � Mn
Mn �.. ��.
Ilk
._----
S-01 r-
1►
As S-01
S-02B
S-03
Fe As -
Co
Co
Fe
Fe
Fe
Mn
Mn
Mn
,
V
ACTIVE
AS BH ASIN
SS-08 g-pg
Co{
�— • • — - •
>
Mn Co
.�
`,�♦�
Mn
1981
LANDFILL
'
V
i
J
SW-REF1
Fe
>r IN ,,
�. MAYO
•` LAKE
r
�* r
�4
.- ,
y'.
S-06
Co
Fe
Mn ;
LEGEND
EPA R4 REGIONAL INDUSTRIAL SOIL SCREENING LEVEL EXCEEDANCE -
BOLDED IF COAL ASH COPC (SEE TABLES 12-2 AND 12-9)1
EPA R4 REGIONAL RESIDENTIAL SOIL SCREENING LEVEL EXCEEDANCE -
BOLDED IF COAL ASH COPC (SEE TABLES 12-2 AND 12-9)1
O SEEP
IN SURFACE WATER POINT
—> DITCH
-
STREAM
-,
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
Arsenic
As
Cobalt
Cc
Iron
Fe
Manganese
Mn
Vanadium
V
NOTES:
1 USEPA. REGIONAL SCREENING LEVELS FOR CHEMICAL CONTAMINANTSAT
SUPERFUND SITES. ACCESSED 07/26/2015.
(http://www.epa.gov/reg3hwmd/risk/human/rb-concentration table/Generic-Tables/index.htm)
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
4 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
5 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
6 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
10 �fDUKE
+O'ENERGY
synTerra PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-8
COPC LOCATIONS FLAGGED
SEDIMENT - HUMAN HEALTH

LEGEND
•
A •�
• � � SW-C62
.,�., i ► S-04 As
5 02 f As
Co
Co `• �,.
• • TDS ` 1
It
l
S-05
As
-�� TDS
FF
)!
)0- D
y'.
♦
EPA NATIONAL RECOMMENDED WATER QUALITY SCREENING LEVEL EXCEEDANCE -
BOLDED IF COAL ASH COPC (SEE TABLES 12-2,12-10 AND 12-11)1
n SEEP
■ SURFACE WATER POINT
—) - — — DITCH
10 STREAM
j� ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
Arsenic
As
Cobalt
Cc
Total Dissolved Solids
TDS
NOTES:
� USEPA. NATIONAL RECOMMENDED WATER CRITERIA. ACCESSED 07/26/2015.
(http://water.epa.gov/scitech/swgu idance/standards/criteria/current/index.cfm)
2 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
3 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
4 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2012. IT WAS
OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
6 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
DUKE U
' ENERGY o
synTerra PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT w
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-9
COPC LOCATIONS FLAGGED
SURFACE WATER I SEEPS - HUMAN HEALTH
t
Ir

Primary Sources Secondary Sources Exposure Medium Exposure Route I Current and Hypothetical Future Ecological Receptors
Existing Primary Release Mechanisms
Ash Basin
ou
FGD Discharge (Periodic)
v
Incomplete Pathway - - - - - ►
e
o
Secondary Source Flow 0
Exposure Medium
FGD Settling Pond
Polishing Pond
Ash Basin
Potential Human Receptors
• Potentially Complete Exposure Pathway
Incomplete Exposure Pathway
Dermal
Soil Incidental Ingestion
Ingestion of Prey or Plants
Surface Water
Dermal
Purposeful Ingestion (Drinking)
Incidental Ingestion
Ingestion of Prey or Plants
Dermal
Sediment Incidental Ingestion
Ingestion of Prey or Plants
- - - Groundwater - -
Incidental Ingestion
Ingestion of Prey or Plants
10P
synTerra
148 River Street, Suite 220
Greenville, SC 29601
Phone: [phone]
Figure 12-10
Ecological
Conceptual Exposure Model
Mayo Steam Electric Plant
s~
UnE-0
P:\Duke Energy Progress.1026\105. Mayo Ash Basin GW Assessment Plan\1.11 CSA Reporting\Figures\Figure 12-10 Ecological CEM Mayo.xlsx8/28/2015

., o+.. .. . .. , SH4 S AIB S AIB a'
N ------ ------ c 2 c 2
1%h
S02 S-02 p Fe Fe P t
�\ • •. 5-02 SH PH pH / B a
v pH B Fe • S-03
pH
}
Fe B SW-C61
_- 5-04 pH
k pH
Fe
•��� / `` pH Fe SW-CB1 SW-CB1www.
jgjpH
S-01 _ _ Fe
pH A
B S-08
B
Fe SpH
PHB S-02B O Al
AI
J� o B pH B
S 01 Fe Fe
pH S-026 S-02B S-08
AI Al �— >
Fe pH pH -.
ACTIVE Cu Cu
ASH BASIN S-OS
pH ` +
AI
.4 1981 ,
1 S-OS -;ri: LANDFILL
BI 'ram'•
S-05 r • _ 1
Al d
r J
.l - -•,
I
r-
1 -•
ye �
/s
° ♦ o
♦ + � o � -01
r
�' ++ S-06
AI
1 SW-REF1
Al ...
s-os •
SW-REF1
Al
LEGEND
EPA R4 FW CHRONIC EXCEEDANCE - (SEE TABLES 12-2 AND 12-14)4
EPAAQUATIC LIFE ACUTE EXCEEDANCE - (SEE TABLES 12.2 AND 12-14)4
EPAAQUATIC LIFE CHRONIC EXCEEDANCE - (SEE TABLES 12-2 AND 12-14)1
NC213 AQUATIC LIFE ACUTE EXCEEDANCE - (SEE TABLES 12-2 AND 12-14)1
NC2B AQUATIC LIFE CHRONIC EXCEEDANCE - (SEE TABLES 12.2 AND 12.14)1 I
0
SEEP
■
SURFACE WATER POINT
—)~ — -
DITCH
I
STREAM
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
pH
pH
Aluminum
Al
Boron
B
Copper
Cu
Iron
Fe
NOTES:
1 USEPA. NATIONAL RECOMMENDED WATER CRITERIA. ACCESSED 07/26/2015.
(http://water.epa.gov/scitech/swgu id ance/standards/criteria/current/index.cfm)
2 USEPA. SUPPLEMENTAL GUIDANCE TO RISK ASSESSMENT GUIDANCE FOR
SUPERFUND: REGION 4 BULLETINS ECOLOGICAL RISKASSESSMENT. ORIGINALLY
PUBLISHED NOVEMBER 1995. WEB§TE VERSION LAST UPDATED 11/30/2001:
(http://www.epa.gov/region4/su perfund/programs/riskassess/ecol bu l.htm I. )
3 NCDENR. CLASSIFICATIONS AND WATER QUALITY STANDARDS APPLICABLE TO THE
SURFACE WATERS OF NORTH CAROLINA. NORTH CAROLINA ADMINISTRATIVE CODE
TITLE 15A, SUBCHAPTER 02B. 2015.
4 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
5 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
6 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
7 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
DUKE o
U
' ENERGY
synTerra PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT w
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-11
COPC LOCATIONS FLAGGED
SURFACE WATER 1 SEEPS - ECOLOGICAL

-------------
-----------------
LEGEND
N
/t-•----
'
i�
MW-03BR
Al
p'
/
EPA R4 REGIONAL SOIL SCREENING LEVEL EXCEEDANCE -
(SEE TABLES 12-2 AND 12-15)1
Cr(Total)
,
MW-16BR
•
.
Fe
Mn;�
'
MW115BR
A
Al
Cr(Total)
� MONITORING WELL
V
Cr(Total)
M�
SOIL BORING
SB-01
-
Fe
Min
VAl
,
DITCH
Cr(Fetal) ! "� �'?l� Si 5� �j a�
V
�SR:15p�
. /
> STREAM
ASH BASIN BOUNDARY
`-
- !
Mn
-
- -
ASH BASIN COMPLIANCE BOUNDARY
V
DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
A
4
-Ai -4-
MW-13BR
Al
Cr(Total)
Fe
V
ABMW-01
` Al
'.\ As
+ Be
o ♦
B
♦ Cr(Total)
Fe
V
T + �
r ' I
it
, r
yre
r ♦
/s
/1r
r ♦
r-�✓ l
♦ o
1
v �
0
co
MW-11 BR
Al
Cr(Total)
Cu
Fe
Hg
V
SB-02
Al
B Mom:
Cr(Total)
Fe
Mn
Se,
V
MW-12D
Al
B A�
Cr(Total)
Fe
V
r
B �r
B -
Cr(Total)
Fe
J Mn
Se
V
♦
MW-07BR MW-08BR
Al Al
Cr(Total) Cr(Total)
Fe Co
V Fe
Mn
n�».tir• Zn ♦ r
r '
d
r♦
r+�r
MW-10BR
Al �.
B 1
Cr(Total)
Fe
Mn
Se
V
Zn
Constituent Full Name
Constituent Abbreviation
Aluminum
Al
Arsenic
As
Beryllium
Be
Boron
B
Chromium
Cr(Total)
Cobalt
Cc
Copper
Cu
Iron
Fe
Manganese
Mn
Mercury
Hg
Selenium
Se
Vanadium
V
Zinc
Zn
NOTES:
1 USEPA. REGIONAL SCREENING LEVELS FOR CHEMICAL CONTAMINANTSAT
SUPERFUND SITES. ACCESSED 07/26/2015.
(http://www.epa.gov/reg3hwmd/risk/human/rb-concentration table/Generic-Tables/index.htm)
2 NC2L FOR ANTIMONY, BERYLLIUM, COBALT, THALLIUM, AND VANADIUM ARE "INTERIM
MAXIMUM ALLOWABLE CONCENTRATIONS" (IMAC).
3 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
4 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
5 PARCEL BOUNDARY WAS OBTAINED FROM THE INC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
6 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
10 4ft� DUKE ENERGY
syn
Terra 3
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT w
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-12
COPC LOCATIONS FLAGGED
SOILS (0-2 FEET) - ECOLOGICAL

A
4
l
• rJ �
...... - -- — --
• �. /
SAl
-02
AI •
• Cr(Total)
• • S-01 Fe
/ As Mn
• • Zn V
' S-01 s.
h
J
Al
As
Ba
B
Cr(Total)
Fe
Mn
Zn
Al
Cr(Total)
Fe
Mn
S-03 1.
Cr(Total) SW-CB2
AI
S-03 Cr(TotalI
Al Fe
Mn
Cr(Total)
Fe V -
Mn Nx
V
SR.1501.N
Ilk -
r'
v
SW-CB1
Al
Cr(Total)
Fe
Mn
V
1981
LANDFILL
1♦
• r.
S-06 .�
t. Zn
r
40 S-06
All
Cr(Total)
Fe
• + Mn
A
Zn
7
LEGEND
EPA R4 EFFECTS VALUE EXCEEDANCE - (SEE TABLES 12-2 AND 12-16)'
EPA R4 SOIL SCREENING LEVEL EXCEEDANCE - (SEE TABLES 12-2 AND 12-16)1
U SEEP
■ SURFACE WATER POINT
DITCH
STREAM
ASH BASIN BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
�^ DUKE ENERGY PROGRESS MAYO PLANT SITE BOUNDARY
Constituent Full Name
Constituent Abbreviation
Aluminum
Al
Arsenic
As
Barium
Be
Boron
B
Chromium
Cr(Total)
Cobalt
Cc
Iron
Fe
Manganese
Mn
Vanadium
V
Zinc
Zn
NOTES:
1 USEPA. SUPPLEMENTAL GUIDANCE TO RISKASSESSMENT GUIDANCE FOR
SUPERFUND: REGION 4 BULLETINS ECOLOGICAL RISKASSESSMENT. ORIGINALLY
PUBLISHED NOVEMBER 1995. WEB§TE VERSION LAST UPDATED 11/30/2001:
(http://www.epa.gov/region4/su perfund/programs/riskassess/ecol bu l.htm I. )
2 SITE AERIAL ORTHOPHOTOGRAPHY IS DATED APRIL 17, 2014. IT WAS OBTAINED
FROM WSP.
3 ADDITIONAL OFFSITE AERIAL ORTHOPHOTOGRAPHY IS DATED 2013. IT WAS
OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.
(http://services.nconemap.gov/)
4 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC
INFORMATION AND ANALYSIS. (http://services.nconemap.gov/)
5 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE
COORDINATE SYSTEM RIPS 3200 (NAD8312011).
GRAPHIC SCALE
400 0 400 800 1,200 1,600 2,000
IN FEET
,�vj 4ft� DUKETerra
ENERGY,-
PROGRESS
148 RIVER STREET, SUITE 220 MAYO STEAM ELECTRIC POWER PLANT
GREENVILLE, SC 29601 10660 BOSTON RD m
864-421-9999 ROXBORO, NORTH CAROLINA27574
www.synterracorp.com
FIGURE 12-13
COPC LOCATIONS FLAGGED
x$ SEDIMENT - ECOLOGICAL

LEGEND
!� MW-1 PROPOSED GROUNDWATER MONITORING LOCATION
- ;•,,MW-15BR�
S PZ-1 PROPOSED MONITORING LOCATION (NOT SAMPLED)
CW-4 DUKE ENERGY PROGRESS MAYO PLANT
CW 3 MW-16S
MW-16D i 500 ft COMPLIANCE BOUNDARY
MW-03BR MW-16BR
MW-14BR WASTE BOUNDARY
M W-02 SOURCES:
{. 2014 AERIAL PHOTOGRAPH WAS OBTAINED FROM WSP FLOWN ON APRIL 17, 2014.
DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE
MW-5BR CW2D - SYSTEM FIPS 3200 (NAD 83).
a ®
2015 GROUNDWATER ASSESSMENT WELL AND BORING LOCATIONS WERE BASED ON SURVEY DATA
CW-2 DATED JULY 17, 2015 PROVIDED BY McKIM & CREED OF WILMINGTON, NORTH CAROLINA.
` +r CW-6
Iss
W-08S
MW-08D
ACTIVE ASH BASIN AMW-07DAMW-07BR
v
MW-04 Q�^�
MW-13BR
MW-09BR
�. ABMW-01
ZMW-0213R�s
MW-02 ZMW-03SMW-03
t CW-1D
•CW-1
df` ABMW-041�1."w4
ABMW-04D ��• z,
ABMW-04BR
oO��m " P - �' - • ' �,. - •" y?racy...-...r..
MW 106R
40
A�POWER PLANT
r.
_ s,4 BG-2
MW-11 BR
1
',�, �l �b� eLY^ � li -� l •'� . s4�4 1- 6: yJ4l- M ,- " ..
k•!,.'r SiY GRAPHIC SCALE
400 0 400 800
FIGURE 16-1
IN FEET PROPOSED GROUNDWATER MONITORING LOCATIONS
r` 148 RIVER STREET, SUITE 220 DUKE ENERGY PROGRESS
MW-12S � ry;,.• GREENVILLE, SOUTH CAROLINA 29601
.. - MW-12D PHONE[phone] MAYO STEAM ELECTRIC PLANT
r - r Terra www•synterracorp.com 1066, BOSTON R
DRAWN BY' C NEWELL DATE: 08/13/2015 ROXBORONORTH CAROLINA
PROJECT MANAGER J WYLIE
LAYOUT PROPOSED LOCATIONS
' - -I 08/30/2015 12.39 PM P:\Duke Energy Pro ress.1026 105. Mao Ash Basin GW Assessment Plan'\1.11 CSA Reportin Fi ures FIGURE 16-1-MAYO-PROP MONT LOCATIONSdw