NC0004774_CSA Report Figures_20150823

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SCALE (FEET)
SITE CONCEPTUAL MODEL - PLAN VIEW MAP
AREA OF BORON EXCEEDANCES OF 2L STANDARDS
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
LEGEND:
ASSUMED PRIVATE WATER SUPPLY WELL
FIELD IDENTIFIED PRIVATE WATER SUPPLY WELL
PUBLIC WATER SUPPLY WELL
RECORDED PRIVATE WATER SUPPLY WELL
REPORTED PRIVATE WATER SUPPLY WELL
APPROXIMATE GROUNDWATER FLOW DIRECTION
---
AREA OF BORON EXCEEDANCES
OF 2L STANDARDS
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENT
WITH DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
DUKE ENERGY PROPERTY BOUNDARY
STREAM
NOTES:
NC 2L GROUNDWATER STANDARD FOR BORON IS 700 pg/L
DATE
AUGUST 2015
FIGURE
ES-1
ROWAN COUNTY, NORTH CAROLINA

UCK (LOMBINED
YCLE STATION
I I w7'*"N��^ 1 l''!ti 1n
NOTES:
I. SOURCES: US TOPO; 2011, USGS NATIONAL MAP AERIAL
IMAGERY; 2010 NORTH CAROLINA STATEWIDE
ORTHOIMAGERY, NC GEOSPATIAL & TECHNOLOGY
MANAGEMENT OFFICE
SCALE (FEET)
1,000 0 1,000 2,000
SITE LOCATION MAP
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
4
DATE
AUGUST 2015
FIGURE
2-1

a ' 1jr _ N
lb FUCK STEAM STATION
COAL FIRED UNITS 1-6
i+�1 _
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vo
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SCALE ('FEET)
Tom U 1"
CELL 3 SECONDARY FUND ri t
CELL 2 PRIMARY POND
. - � s,
.%- k1.-0.4
PRE. -ASH BASIN USES MAP
DUKE ENERGY CAROLINAS, LL
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
CATE
AUGUST 2015
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Buck Steam Station Water Schematic Diagram - NPDES Permit NC0004774 - Rowan County
Evap D 'ft
3273 2� 5 Cycles
4299 Makeup 4229 4091 Cooling Condenser 816
Clarification Tower
Closed
CT Evap
3 11a� 5 Cycles
Solid 138
Waste
Chiller System CT Slowdown 2g
Water
1 Potable
1 Septic
67
Supply
Users
System
Fire
Protection
Misc
20
Oil
20
0 20
Uses
arator
Plant:
11
65 Filtered Wtr
45 Reverse
34
32
Microfiltration
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Osmosis
9
2
274,306
Condenser Cooling Water Outfall 001 (395 MGD)
Misc Equipment
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1
51
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i Outfall 002A Intermittent
Sump System ^
Storm Water
(intermittent) ------------------- ----------
- !
Outfall 004 177 (0.255 MGD)
l Intake Screen Backwash
MOutfall 005 1889 (2.72 MGD)
Misc Equipment Cooling
(Non -Contact)
LEGEND Existing —Yellow /Shared —Tan /Combined Cycle -Blue
Flow Unit — Galllons Per Minute (gpm)
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NOTES:
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s Ba Cd Cr Pb Hg Se A0 Sb Be B Cu Mn Ni TI V Zn
EPA Residential Sail Screening Level Element
'ConCerrtrafu4n5 fe5s than
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TRACE ELEMENTS IN BOTTOM ASH VS SOIL (EPRI)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
DATE
AUGUST 2015
FIGURE
3-5
OWAN COUNTY, NORTH CAROLINA

164
*416
s !� ♦q I Q. 1.�� 44
25
.' ... .. y152
156 p26
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- -_\ ti __ I ® Q 1590111 125 P,WS ID-
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g Fo
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r 112
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4
w v
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35
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i Legend�
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e
4 0137 0 r O C36 G20 G21 -? �% 0.5 MILE OFFSET FROM ASH BASIN
13506138 0 O 27 - , a COMPLIANCE BOUNDARY
1670 1 8
0 0134 O O tl ASH BASIN COMPLIANCE BOUNDARY
136 0175 1b9' 130 00 0 CD 00 O pQ * -! ASH BASIN COMPLIANCE BOUNDARY
x •c3 129 00 O p�0 :ki ' ` — — —COINCIDENT WITH DUKE ENERGY
j • d 0 O } =`
�,,,� �� �"' I _ , ! � PROPERTY BOUNDARY
�. O 00 C, 1
�lssle 128 O I �' --� I ASH BASIN WASTE BOUNDARY
133 10 O 00 -0 pO �` ® ' �'' P /r - ASH STORAGE AREA BOUNDARY
1]32 .r W p p DUKE ENERGY PROPERTY BOUNDARY
ONG FERRY RD:;-racld ��, 0 O - F, / ��6r, J i .
. •L _ p,, STREAM
•�`°0'40 ' O mot—= • PUBLIC WATER SUPPLY WELL
.= O Opp 0 d - = �.._ �,,.i
0 O • FIELD IDENTIFIED PRIVATE WATER SUPPLY
CRAWFORD RDp -
/ 0 116 WELL
J,
- 121 F K-- • RECORDED PRIVATE WATER SUPPLY WELL
F
I f • REPORTED PRIVATE WATER SUPPLY WELL
�T1 J; r f l'_, �' �J~L \ • i _ �� O ASSUMED PRIVATE WATER SUPPLY WELL
NOTES: SCALE (FEET) DATE
1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE. USGS RECEPTOR MAP
2. PRIVATE WELL LOCATIONS ARE APPROXIMATE. 500 0 500 1,000 AUGUST2015
3.USGS7.5-MINUTESERIES TOPOGRAPHIC BASEMAPCOPYRIGHT:©2013NATIONAL GEOGRAPHIC SOCIETY I -CUBED DUKE ENERGY CAROLINAS, LLC
4. THE COMPLIANCE 5.HYDROGRA HYWASOBTAINEDFROMUSGS7..5-MUNDARY IS ESTABLISHED CNRDING SERIOESITOPOGRAPHICMAPSSALISE DEFINITION FOUND IN B1RvNc2L.o1o7(a). BUCK STEAM STATION ASH BASIN FIGURE
6. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE.
7. PROPERTY INFORMATION PERTAINING TO IDENTIFIED WATER SUPPLY WELLS IS INCLUDED IN TABLE 4-1 ROWAN COUNTY, NORTH CAROLI NA
4-1

M4
DAVIDSON COUNTY
LL 15� •3
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RIMi4R+Y POND
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NOTES:
1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE.
2. PRIVATE WELL LOCATIONS ARE APPROXIMATE.
3. ORTHOPHOTOGRAPHY IS FROM NC ONEMAP GIS ONLINE SERVICE.
4. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a).
5. HYDROGRAPHY WAS OBTAINED FROM USGS 7.5-MINUTE SERIES TOPOGRAPHIC MAPS SALISBURY, NC
6. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE.
7. PROPERTY INFORMATION PERTAINING TO IDENTIFIED WATER SUPPLY WELLS IS INCLUDED IN TABLE 4-1
SCALE (FEET)
500 0 500 1,000
I
r65
40 14 149 `163 162 1 1:71. 47,/
• �_ ®165 4.0 ® •172, �.
145• 142, _,141 127
155 •41
150 147 •144 96 1� 9
143ti�. �,148 — 42 •43 12^` ;124e ,
„� •159 111 •78 80 � � • � PWS ID
• 125
58 14
�15'7 176 �79 0
154• ' 110� 81 �85
153 12�2 ` 82
84
173 97 •1 , 0 �83 � ,
•4 �' '98 •
�89
115� •�.14 92, '93 • 101 •. 8
•1 �
�' 1�0r 10 �113
10� 104 1
•
�, 11� 107 •117
Legend
..� 0.5 MILE OFFSET FROM ASH BASIN
COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
g' ASH STORAGE AREA BOUNDARY
— — — DUKE ENERGY PROPERTY BOUNDARY
.r; STREAM
® PUBLIC WATER SUPPLY WELL
FIELD IDENTIFIED PRIVATE WATER SUPPLY
r 0 WELL
j O RECORDED PRIVATE WATER SUPPLY WELL
f 0 REPORTED PRIVATE WATER SUPPLY WELL
—!. — O ASSUMED PRIVATE WATER SUPPLY WELL
RECEPTOR MAP - AERIAL BASE
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
I
DATE
AUGUST 2015
FIGURE
4-2

1
NOTES:
1. WASTE BOUNDARY AND ASH STORAGE AREA BOUNDARY ARE APPROXIMATE.
2. AERIAL PHOTOGRAPHY WAS OBTAINED FROM WSP DATED APRIL 17, 2014..
3. HYDROGRAPHY WAS OBTAINED FROM FROM USGS 7.5-MINUTE SERIES TOPOGRAPHIC MAPS SALISBURY, NC,
SOUTHMONT, NC AND ONSITE OBSERVATIONS.
SCALE (FEET)
250' 0 250' 500'
/" = 500'
SURFACE WATER BODIES
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN, NORTH CAROD NA
LEGEND:
ASH BASIN WASTE BOUNDARY
ASH STORAGE AREA BOUNDARY
1500 FT OFFSET FROM ASH BASIN WASTE BOUNDARY
STREAM
RIVER FLOW DIRECTION
DATE
AUGUST 2015
FIGURE
44

Fjo`N
NOTES:
1. ASH BASIN WASTE BOUNDARY AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE.
2. ORTHOPHOTOGRAPHY IS FROM INC ONEMAP GIS ONLINE SERVICE.
3. PROPERTY BOUNDARIES WERE SUPPLIED BY ROWAN COUNTY GIS OFFICES.
4. PROPERTY INFORMATION PERTAINING TO IDENTIFIED PROPERTIES IS INCLUDED IN TABLE 4-2
SCALE (FEET) PROPERTIES CONTIGUOUS TO THE
500 0 500 1,000 ASH BASIN WASTE BOUNDARY
F)l DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
Legend
ASH BASIN WASTE BOUNDARY
ASH STORAGE AREA BOUNDARY
ADJACENT PROPERTIES
DATE
AUGUST 2015
FIGURE
4-5

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❑ Nna4uarorddAwmmmawnaa',
NropmhurokmtmdrlhDwUomwMIMMdm
awruy; m rokW: WAS alpniCaMomo awnlry
Udine SupeoewaAe (*GoAanan(
Gmaalmam
❑ Supn7wsml(mw9ndalwnpRe
dt GLmaAaMMrfMllm
m tkdjn wa.
DASI maw
. NhalusldmgdMhlItampomw
XadpdawM apdaMM aM M vdtmism.
Bmoswkk (ChadeslGA) tMlaAe
❑ raPmMmmcenMl
mggIASSNNMAft5NI0fE op
❑= wolm�skndlw ndda
Sad=vm h'mEwew "neoc
Suwannee lemne IGondwanan pravanantel
IuAas and toafguwdors ahw iMmas,19d9(
❑ Glda%Nm�NYOmMaldMMhwmtXl
I] NwpdxmoicCoen aoMsicrokmicmds
❑SupimW Ow graw) wmpmmh
Nmgd7xwwtaposiammdmkauw
IoOAannaddyawdpt
❑Midw PmaW Am AEXMdm wmdwt art!
AMcaonlrnslltmmal.aFpalacaiaasl.
F/ gr
\\00IIIIIIIIIIIi
t
Abbreviations antl Symbols
9. � ..-,
a.uowmw,wl
aa-a»mmaadammN
u-Aamwwnl5N
P
u.kwsmrnraM!
ma-WMrmWwn:NW-aU
+M-awsmWlea,A7
Q;,
aww.G gMwm Gwq
a. mlatmaMare p el
d- Mw�a p
F I:
[ga-aw4wwaaamw+a4
w.pAtlIMINM
%' -r
lu-XrmYamlwwdw
aw�nma'xwawmMdwdaNG
Mr-aemN»wM{u�N
a- -
"'. -
m-:wmw9wwlmryV
Ia.raedw[°nwd rim
Or-&pastlsm01Gtt1
�
ql-MpwmiwdX
wrr-Yow9nlA'rN1owIIN
mV-hAdewemthMendwtm
e
i i i,
Na YdAdwmurry/d
a-MMmwamllMj
tfw-taMAyWYmaNMaMQ
- Q'�
Id-immla.NtAtl
ttr smmwptmkrsm.wdaAl
w�anvawpe-M
E'•'o-•
w-XNI(mMmtlllk
wa-SwMnYNMMrmMIMI
fWNtl-etldWwnXlMwWp
�:o ti.-:o b �
mn-wruNNwrMrmmlwrydrw
ror-IwmrrMtm,tpufan
fA-Go1Pa1aYIMLN
ems'-,e-'.-
w-aad°n.malsp
mamwtmdmmsAM
au-smds.d,adswwcN
h-�,o e.�,o:
f"e4'hl"'%
m-wunamfmwhaka+mnMlaa7
°-r
4 0
mRfmmnhmalaaddA
mwMdmnhaudwmdu>Fwwm
w-NWwaM,mahumwvw
-' ,
.-a am Ndmw
(bL,:e b..
„-
NwmaardMdn
puluwwonwamdrt-sA
'Irk
��••
.-., smruM1wmwMr.M0
w-lMrNeh'bhAPq
N
,'
,,,,,
wl-IW[anhMwdwiraMlAttal
/ J
tom"-
��� MYmiwdpM
YmYi3,,wgIMMIWSFXLI
P(a�
'wa,f pmw49Wypman
kp-N0m1trtMMpLNM
wMYdM�
mdMPkdwmSmwem
M-MYMWaYGpMdaNpMWNAtI
1
MMmwM1m
Pi.Mwmlrbrm.ryy
Fmrdaw'mam
Hrrma.,wam
w.abwhaMWG
.,a„.,,,. yy.wrn»nm
�
yM.SWNAAGMA
aM..bygerYsamaWlWMI
AmdwMFtllrym
Aw-pap:rMAwO
�� w~,w�m�Md
r
w.ammmmMmlaA*7
18°
Amadmwdam
r%. wmMNaahwlNLlaMba mkMMwwn
SIM-4wWtlMWINpN
�7
m.n»sxwxawlNy
... keµlpwaw4emwdMeemaPwnv,w,
' , MxptuMiMupbrrnYdalhMaNmhMAr-M7
0 100
miles
34°

F)2
REGIONAL GEOLOGIC MAP
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION
NPDES PERMIT #NC0004774
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
5-2

SOIL
Regolith
ZONE
unsaturated
zone
_ Water fable
REGOLITH
Regolith
RESIDUUM
saturated
zone
TRANSITION
ZONE��j
'
C'Q
WEATHERED
BEDROCK
f�
UNWEATHERED
BEDROCK
phi `
FRACTURED BEDROCK
SHEET JOINT
�
J 1t
BEDROCK
'
STRUCTURE
FRACTURE
4
1
NOTES:
1. HARNED, D.A. AND DANIEL III, C.C.
1992. THE TRANSITION
ZONE BETWEEN BEDROCK REGOLITH: CONDUIT FOR
CONTAMINATION?, P. 336-348, IN
DANIEL, C.C., III,
WHITE, R.K., AND STONE, P.A., EDS.,
GROUNDWATER IN
THE PIEDMONT: PROCEEDINGS OF A CONFERENCE ON GROUND WATER IN THE PIEDMONT
OF THE EASTERN
UNITED STATES, OCTOBER 16-18,
1989, CLEMSON
UNIVERSITY, 693P.
INTERCONNECTED TWO MEDIUM PIEDMONT
GROUNDWATER SYSTEM
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
DATE
AUGUST 2015
FIGURE
5-3
ROWAN COUNTY, NORTH CAROLINA

A LAND
SOIL { SURFACE
SAPROLITE ' i p
O 0 0 0 00 o
TRANSITION ZONE doe 0 �0�%��°��OO�l��jp0,O0�D0OODolO� p�Opa
f � P
BEDROCK
FO
/ �90
/ f Op i
a) Foliated/Layered Bedrock
LAND
SOIL
SAPROLITE
INDISTINCT
TRANSITION ZONE
BEDROCK
b) Massive/Plutonic Bedrock
NOTES:
1. HARNED, D.A. AND DANIEL III, C.C. 1992. THE TRANSITION ZONE BETWEEN BEDROCK REGOLITH: CONDUIT FOR
CONTAMINATION?, P. 336-348, IN DANIEL, C.C., III, WHITE, R.K., AND STONE, P.A., EDS., GROUNDWATER IN
THE PIEDMONT: PROCEEDINGS OF A CONFERENCE ON GROUND WATER IN THE PIEDMONT OF THE EASTERN
UNITED STATES, OCTOBER 16-18, 1989, CLEMSON UNIVERSITY, 693P.
CONCEPTUAL VARIATIONS OF THE TRANSITION
ZONE DUE TO ROCK TYPE STRUCTURE
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
DATE
AUGUST 2015
FIGURE
5-4
ROWAN COUNTY, NORTH CAROLINA

uff9 STEM
Slope Aquifer Boundary and Topographic Di.nde
m m m i m® Discharge Boundary
- - - - - - - Compartment (C) Boundary
.*.............. Water Table
Fractures
Groundwater Flow Direction
NOTES:
1. LEGRAND, H.E. 2004. A MASTER CONCEPTUAL MODEL FOR HYDROGEOLOGICAL SITE CHARACTERIZATION IN THE
PIEDMONT AND MOUNTAIN REGION OF NORTH CAROLINA, A GUIDANCE MANUAL, NORTH CAROLINA DEPARTMENT
OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY, GROUNDWATER SECTION, 50P.
PIEDMONT SLOPE -AQUIFER SYSTEM
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
5-5

NOTES: SCALE (FEET)
1. ASH BASIN WASTE BOUNDARIES AND ASH STORAGE AREA BOUNDARIES ARE APPROXIMATE..
2. ORTHOPHOTOGRAPHY IS FROM INC ONEMAP GIs ONLINE SERVICE. 500 0 5001,000
3. THE COMPLIANCE BOUNDARY IS ESTABLISHED ACCORDING TO THE DEFINITION FOUND IN 15A NCAC 02L.0107(a). p
4. DUKE ENERGY PROPERTY BOUNDARY WAS SUPPLIED BY DUKE ENERGY REAL ESTATE.
5. BASED ON GEOLOGIC MAP OF THE CHARLOTTE 1° X 20 QUADRANGLE, N.C. AND S.C. (GOLDSMITH 1988) AND HDR FIELD RECONNAISSANCE (2004, 2015)
6. SERVICE LAYER CREDITS: NC ONEMAP, NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS, INC 911 BOARD
F)l
I
Legend
GEOLOGY
(DSsg) Granite of the Salisbury Plutonic Suite
(Devonian and Silurian) - Light gray, locally pink,
medium- to coarse -grained leucocratic granite;
includes some quartz monzonite; weakly foliated,
commonly has mortar texture
(mv) Metavolcanic Rocks - Rocks of either felsic
metavolcanic (mvf) and mafic and intermediate
metavolcanic (mvm) type or commonly both
interbedded; those of Charlotte belt are probably
correlative, at least in part, with felsic
metavolcanic rocks (Zbvf) and mafic to
intermediate metavolcanic rocks (Zbvm) of the
Battleground Formation
TOP -OF -ROCK AT BORINGS
- fmv - Felsic Metavolcanic
❑ imv - Intermediate Metavolcanic
® mmv - Mafic Metavolcanic
CONTACTS - Solid where approximate;
dotted where concealed
— — — DUKE ENERGY PROPERTY BOUNDARY
SITE GEOLOGIC MAP
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
—COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
DATE
AUGUST 2015
FIGURE
6-1

r
r
M
dp
'r
Qaao�°�a
---- - - - -
QanoQ
r
GWA-5S/BRU
'GWA-12S/D�
GWA 6S/B"R/BRU�I
MW-35/D�
�MW-11S/D
" 'hv
IGWA-4S/D
_m
B-9S/D/BRA, '\MW-4S/D
AB-6BRU J' -e—AB-7S/SL/BRU
r
—GWA-3S/BR/BRU
'.—AB-8S/D
\MW-5S/D
\AB-5S/,SL/BR,W
MW-'2�S/ B-4.S/SLBR/BRU
% I _
GWA-2BR/BRU
'. •,- , -• - • •-
•
I�
A -
AS-1 S/D MW-12S/D
. - - • • - : • . -
f
AS-2D
• :•
SAS-3S-/D
MW-13D ,,
}
GWA-11 S/D
r
MW-7S/D
s BG-3S/D+
MW-6S/D\ y ..
GWA-1
S/D /
_
\MW-8S/D
a ,4T
'k
BG-1 S/D/BR
-j
l
BG 2S/_D F
SCALE (FEET)
MONITORING WELL AND SAMPLING LOCATION MAP
DUKE ENERGY CAROLINAS, LLC
BUCK STREAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
6-2

NOTES:
1. BASE MAP FROM MOUNTAIN ISLAND LAKE, N.C. AND LAKE NORMAN SOUTH, N.C. USGS 7.5-MINUTE TOPOGRAPHIC QUADRANGLES
A
\
€'a.a
�C r+,',�
f
• tom(
-
' I�•� � ~ `•"L\ F
'1}ryf7���w.`.,(!��''°
.. u,r
-
4 of .��
_
.���.. \ •9,�^,�. ' ,!''
`
.i
Lineament Identified from
wl
topographic map interpretation
.
�. �..-u.a..
y, i ._,� Imo_ i �.'
n' L-�tl�`��ii �" ...:I �.,�•.�.�`��r,. ,
I=)
TOPOGRAPHIC LINEAMENTS
AND ROSE DIAGRAM
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 20"
FIGURE
6-3

NOTES:
1. PHOTOMOSAIC OF RIVERBEND PERFORMED WITH A LIETZ SOKKIA MS-27 MIRROR STEREOSCOPE WITH MAGNIFYING BINOCULAR EYEPIECE
2. AERIAL PHOTOGRAPHY PROVIDED BY DUKE ENERGY (FROM WSP), 9X9 INCH GRAYSCALE CONTACT PRINTS, 1"=600", DATED 04/17/2014
F)
AERIAL PHOTOGRAPHY LINEAMENTS
AND ROSE DIAGRAM
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAF:`i
DATE
AUGUST 2017
FIGURE
6-4

500 0 500 1,000
SCALE (FEET)
FEZ
L ILL L L
mull
L L LY
L L L L
ROWAN COUNTY, NORTH CAROLINA
LEGEND
APPROXIMATE GROUNDWATER FLOW DIRECTION
ASH BASIN ASSESSMENT GROUNDWATER
MONITORING WELL
GROUNDWATER CONTOUR LINE
- - - DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENT
- - - WITH DUKE ENERGY PROPERTY BOUNDARY
STREAM
NR - NO READING
DATE
AUGUST 2015
FIGURE
6-7

' G3p°� �oaoD
f ,
570
Yadkin River at NDPES Outfall
,..
GWA1 21D---� T
62.61-67'
MW11D
Secondary Pond
646-7`a
f AB9D_a-` M, 4D \�GWA4D
3
G. • A7�D 609.42i%'% 638.7'
630.88'
GWA10D
ABED III>
672.99' ' 1`
GWA8 D
685.. 2'
')93.17
11: � 6
Cell 2 Primary Pond
70-0
GW
Cell 1 Additional Primary Al D Y Pond
`h '�• � MW8D 699.9'
705.39'
23
:.BG21 , .
703.65'
MWSD
NR
T OIsolated Pond
M
i�
/
i•

500 0 500
SCALE (FEET)
L L LL L l`Y
1,000
F)lL L LY
L L L L
ROWAN COUNTY, NORTH CAROLINA
LEGEND
J10- APPROXIMATE GROUNDWATER FLOW DIRECTION
ASH BASIN ASSESSMENT GROUNDWATER
MONITORING WELL
ASH BASIN COMPLIANCE GROUNDWATER
MONITORING WELL
ASH BASIN VOLUNTARY GROUNDWATER
MONITORING WELL
WATER TABLE CONTOUR LINE
- - - DUKE ENERGY PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY COINCIDENT
WITH DUKE ENERGY PROPERTY BOUNDARY
STREAM
NR - NO READING
DATE
AUGUST 2015
FIGURE
6-5

t
Pill
to
ILL, I
x
W"PILO
PIPILL
P, OIL:
w
Pry, r4If
i ti�S i a
} a
-- l Poo, its °r A. POW* i 7
�,k. a, rg x'trA r A
It
r.^
i 4A IF.. i
r, ' ti
If
y,I Not e
If �'( r LI
r !
r lfr �: ` h '
o
w ai A
r j.It I,
1II
it
« L.P. i ! �n. � t� Hvt,y IV 0
4� Rr
i ' «
x 1
,. �;i.
i'N t
7! V L 'I It
'' i •I PILL *fi
0 If
Oil r:r
In
t r'Y ;. �Y�r 1 ."91�, ti
f y• i t i Q� i F '
kit+�'.J: " ) 4,t ry ..« ) ,� F. <" i1rr
r�!iI ti
�1If
! �,' t of
> BiL (( �, X.� ¢I 5,
ffLPIC
�rk2A� �' 4 • e� a. ty.d PIT��
`, fL Itv SF
j �' �JA 'I • i. ) i J P..1 AL
ti')
}e., _. ,. r.. r
40
ItILL A
it SR phi \ tr NJ I��.
If I At
Vot
r%a%Y �'�� i — tS, i It f
i r !_ R't
4� yV". r If
atr
r ( r)
r It
I If If,}. �, A ,t?
4 a �-
LL
9 a L4 34P VLIZ

T T Ti T-T T
Analyte
CAS No.
NC PSRG Ind'
NC PSRG Prot GIN'
Aluminum
7429-90-5
100,000
NS
Antimony
7440-36-0
94
0.9
Arsenic
7440-38-2
3
5.8
Barium
7440-39-3
44,000
580
Beryllium
7440-41-7
460
63
Boron
7440-42-8
46,000
45
Cadmium
7440-43-9
200
3
Chromium*
16065-83-1
100,000
360,000
Cobalt
7440-48-4
70
0.9
Copper
7440-50-8
9400
700
Cr(VI)
18540-29-9
6.3
3.8
Iron
7439-89-6
100,000
150
Lead
7439-92-1
800
270
Manganese
7439-96-5
5,200
65
Mercury
7439-97-6
8
1
Molybdenum
7439-98-7
1,200
NS
Nickel
7440-02-0
4,400
130
Nitrate
14797-55-8
100,000
NS
Selenium
7782-49-2
1200
2.1
Silver
7440-22-4
1,200
3.4
Strontium
7440-24-6
100,000
NS
Thallium
7440-28-0
2.4
0.28
Tin
7440-31-5
100,000
10,000
Vanadium
7440-62-2
1200
6
Zinc
7440-66-6
70,000
1,200
* Chromum standard shown is for Chromum III for corrparison.
No available standard for Total Chromium
All units shown in mg/kg.
1 - North Carolina DENR Inactive Hazardous Sites Branch - Preliminary Soil Rerrediation Goals
(PSRG) Table (March 2015). Industrial Heath Based Soil PSRG and Protection of Groundwater
PSRG shown for cor parison.
NOTES:
U = NOT DETECTED ABOVE THE LABORATORY REPORTING LIMIT
J = ESTIMATED CONCENTRATION
<3.0 = LESS THAN THE LABORATORY REPORTING LIMIT
J+ = ESTIMATED CONCENTRATION BIASED HIGH
J- = ESTIMATED CONCENTRATION BIASED LOW
PSRG: PRELIMINARY SOIL REMEDIATION GOAL
ft: FEET
mg/kg: MILLIGRAMS PER KILOGRAM
BOLD: EXCEEDS INDUSTRIAL HEALTH STANDARD
UNDERLINED & ITALICS: EXCEEDS PROTECTION OF GROUNDWATER
BOLD, UNDERLINED & ITALICS: EXCEEDS BOTH INDUSTRIAL HEALTH
STANDARD & PROTECTION OF GROUNDWATER
GROUNDWATER ASSESSMENT
MONITORING WELL
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
-- DUKE ENERGY PROPERTY BOUNDARY
STREAM
AUGUST 2015
500
SCALE (FEET)
500
1,000
T T T
T T TT
ROWAN COUNTY, NORTH CAROLINA
FIGURE

1
2
3
0
5
N
7
91
A
750
700
650
.�•
550
500
AB-2D
AS-2 D
Sample Depth ft
5-6.5
14-15.5
19-20.5
24-25.5
Ash
Ash
Soil
Soil
Anal e (mg/kg
Arsenic
14.8
22.8
*DNE
*DNE
Cobalt
6.9
9
7.7
495
Iron
8010
31200
86100
35700
Boron
*DNE
*DNE
71
*DNE
Vanadium
4z.5
5.L6
i6
551
Manganese
*DNE
161
289
2370
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
DISTANCE (ft)
HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
ISSUE DATE DESCRIPTION
SECTION A
SCALE: HORIZ 1 "=120' 11-1
VERT 1 "=30'
PROJECT MANAGER T. YANOSCHAK, PE
DRAWN BY:
-
DESIGNED BY:
-
CHECKED BY:
-
APPROVED BY:
-
PROJECT NUMBER
000000000246400
NOT FOR
CONSTRUCTION
DUKE ENERGY CAROLINASILIC
/� DUKE
ENERGY.:
ROWAN COUNTN
750
rielf
4
01
w
Ix
650
W
W
N
w
Z
J
2
U
a
600
550
500
2800
BUCK STEAM STATION
COMPREHENSIVE SITE
ASSESSMENT
NORTH CAROLINA
ANALYTE
NC PSRG Ind'
NC PSRG Prot GW'
ALUMINUM
100,00
NS
ANTIMONY
94
0.9
ARSENIC
3
5.8
BARIUM
44.000
580
BERYLLIUM
460
63
BORON
46,000
45
CADMIUM
200
3
CHROMIUM*
100,000
360,000
COBALT
70
0.9
I COPPER
9.400
700
Cr(VI)
6.3
3.8
IRON
100,000
150
PLEAD
800
270
I MANGANESE
5,200
65
I MERCURY
8
1
MOLYBDENUM
1,200
NS
NICKEL
4,400
130
NITRATE
100,000
NS
SELENIUM
1,200
2.1
SILVER
1.200
3.4
STRONTIUM
100.000
NS
THALLIUM
2.4
0.28
TIN
100.000
10.000
VANADIUM
1,200
6
ZINC***
70,000
1,200
*Chromium standard shown is for Chromium III for
comparison.
No available standard for Total Chromium.
All units shown in mg/kg.
1— North Caroilina DENR Inactive Hazardous Sites
Branch — Preliminary Soil Remediation Goals
(PSRG) Table (March 2015). Industrial Health
Based Soil PSRG and Protection of Groundwater
PSRG shown for comparison.
NOTES:
U = NOT DETECTED ABOVE LABORATORY REPORTING
LIMIT
J = ESTIMATED CONCENTRATION
<3.0 = LESS THAN LABORATORY REPORTING LIMIT
J+ = ESTIMATED CONCENTRATION BIASED HIGH
J— = ESTIMATED CONCENTRATION BIASED LOW
? = ESTIMATED TRANSITION ZONE (TZ) BEDROCK
(BR) CONTACT
PSRG: PRELIMINARY SOIL REMEDIATION GOAL
FT: FEET
MG/KG: MILLIGRAMS PER LITER
pG/L: MICROGRAMS PER LITER
BOLD: EXCEEDS INDUSTRIAL HEALTH STANDARD
UNDERLINED & ITALICS: EXCEEDS BOTH INDUSTRIAL
HEALTH STANDARD & PROTECTION OF
GROUNDWATER
LEGEND:
WATER TABLE SURFACE (SUMMER 2015)
ASH — ASH
F — FILL
S — ALLUVIUM
M1 — SOIL/SAPROLITE; N < 50
M2 — SAPROLITE/WEATHERED ROCK;
N >_ 50% OR REC S 50%
TZ — PARTIALLY WEATHERED ROCK;
REC>50% AND RQD <50%
BR — SOUND ROCK;REC > 85% AND RQD >: 50%
CROSS SECTION A -A'
SOLID MATRIX ANALYTICAL RESULTS
IC
IM
0 1" 2"
FILENAME FIGURE 8-2.1.DWG SHEET
SCALE AS NOTED FIGURE 8-2.1
W

1
2
3
4
5
N
7
Ll
EAST
750
700
N
I
W
650
W
W
Vl w
550
500
AB-5BRU
Sample Depth (ft
3-5
29-30.5
49-50.5
59-60.5
64-65.5
Soil
Soil
I Soil
soil
Soil
Anal e m k
Arsenic
*DNE
*DNE
Cobalt
*DNE
15.1
2,i
Iron
13400
21900
21400
Selenium7z7r
7..8)-
*DNEE
6.91
*DNE
74
*DNE
Vanadium106J+
12.2
ZS�
¢�
773Man
anese*DNE
2 4
277
AB-L'I4BR
RU
AB IABB 4SL
AB-5BRU
AB-5SL
(AB
B- S
AB-48RU
Sample Depth ft
3-5
23.5-25
48.5-50
53.5-55
58.5-58.9
Ash
Ash
Ash
Soil
sal
Anal e m /k
Arsenicl
3
7.
*DNE
*DNE
*DNE
Cobalt
103
773
13.4
787
Iron
8110
y�Q
4950
Z21f�
Vanadium
I ZZ1
1 724
Manganese
I *DNE
1 75.7
164
1 182
1 205
AB-9BRU
Sample Depth ft
34-35.5
54-55.5
79-80.5
soil
Soil
Soil
Anal m /k
cobalt
1.
11.
6.3
Iron
17800
18500
6130
Vanadiuml
71.3
14.
33
Marl
3 7
1 461
68.2
GWA-5BRU
Sample Depth ft
34.5-36
44.5-45
Soil
Soil
Anal m k
Cobalt
Iron
31 0
Vanadium
.2
Ma anese
1
446
GWA-5S
GWA-5BRU
A'
WEST
2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 5500
DISTANCE (fl)
HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
SECTION n
'_GALE: HORIZ 1"=120' 11-1
VERT 1"=30'
PROJECT MANAGER T.YANOSCHAK,PE
DRAWN BY:
DESIGNED BY: -
CHECKED BY: -
APPROVED BY: -
ISSUE DATE DESCRIPTION PROJECTNUMBER 1 000000000246400
DUKE ENERGY CAROLINAS,LLC
BUCK STEAM STATION
NOT FOR 1p DUKE DUKE n COMPREHENSIVE SITE
CONSTRUCTION ASSESSMENT
ROWAN COUNTY NORTH CAROLINA
750
700
650
600
550
500
ANALYTE
NC PSRG Intl'
NC. PSRC Prot GW'
ALUMINUM
100 00
NS
94
RSE
ARIUM
BERYLLIU
BORON
CADMIUM
CHROMIUM*
44-Q
460
63
45
46.000
200
100 000
3
360,000
COBALT
COPPER
Cr(VI)
IRON
LEAD
MANGANESE
MERCURY
MOLYBDENUM
70
0.9
9,400
700
6.3
3.8
100,000
150
800
270
5,200
65
8
1
1200
NS
NICKEL
4,400
130
NITRATE
100,000
NS
SELENIUM
1200
2.1
34
-SILVER0
TI�
1 00,OOQ
VANADIUM
1 2 00
__J_01_1200
6
ZING--
70,000
1,200
M
*Chromium standard shown is for Chromium III for
comparison.
No available standard for Total Chromium.
All units shown in mg/kg.
1- North Caroillna DENR Inactive Hazardous Sites
Branch - Preliminary Soil Remediation Goals
(PSRG) Table (March 2015). Industrial Health
Based Soil PSRG and Protection of Groundwater
PSRG shown for comparison.
NOTES:
U = NOT DETECTED ABOVE LABORATORY REPORTING
LIMIT
J = ESTIMATED CONCENTRATION
<3.0 = LESS THAN LABORATORY REPORTING LIMIT
J+ = ESTIMATED CONCENTRATION BIASED HIGH
J- = ESTIMATED CONCENTRATION BIASED LOW
? = ESTIMATED TRANSITION ZONE (TZ) BEDROCK
(BR) CONTACT
PSRG: PRELIMINARY SOIL REMEDIATION GOAL
FT: FEET
MG/KG MILLIGRAMS PER LITER
NG/L MICROGRAMS PER LITER B
BOLD: EXCEEDS INDUSTRIAL HEALTH STANDARD
UNDERLINED & ITALICS: EXCEEDS BOTH INDUSTRIAL
HEALTH STANDARD & PROTECTION OF
GROUNDWATER
LEGEND:
WATER TABLE SURFACE (SUMMER 2015)
ASH - ASH
F - FILL
S - ALLUVIUM
M1 - SOIL/SAPROLITE; N < 50
M2 - SAPROLITE/WEATHERED ROCK;
N ? 50% OR REC 5 50%
TZ - PARTIALLY WEATHERED ROCK;
REC>50% AND ROD <50%
BE - SOUND ROCK;REC >- 85% AND ROD a 50%
CROSS SECTION A -A'
SOLID MATRIX ANALYTICAL RESULTS
0 V. 2" FILENAME FIGURE8-2.2.DWG SHEET
SCALE AS NOTED FIGURE 8-2.2
0

HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
ISSUE DATE DESCRIPTION
PROJECT MANAGER T. YANOSCHAK, P.E.
DRAWN BY:
-
DESIGNED BY:
-
CHECKED BY:
-
APPROVED BY:
-
PROJECT NUMBER
000000000246400
NOT FOR
CONSTRUCTION
DUKE ENERGY CAROLINAS,LLC
DUKE
ENERGY.:
ROWAN COUNTY
BUCK STEAM STATION
COMPREHENSIVE SITE
ASSESSMENT
NORTH CAROLINA
CROSS SECTION B-B'
SOLID MATRIX ANALYTICAL RESULTS
0 1" 2" FILENAME I FIGURE 8-3.DWG
SCALE I AS NOTED
SHEET
FIGURE 8-3

HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
ISSUE DATE DESCRIPTION
PROJECT MANAGER T. YANOSCHAK, P.E.
DRAWN BY:
-
DESIGNED BY:
-
CHECKED BY:
-
APPROVED BY:
-
PROJECT NUMBER
000000000246400
NOT FOR
CONSTRUCTION
DUKE ENERGY CAROLINAS,LLC
DUKE
ENERGY
ROWAN COUNTY
BUCK STEAM STATION
COMPREHENSIVE SITE
ASSESSMENT
NORTH CAROLINA
CROSS SECTION C-Cl
SOLID MATRIX ANALYTICAL RESULTS
0 1" 2" FILENAME I FIGURE 8-4.DWG
SCALE I AS NOTED
SHEET
FIGURE 8-4

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.35 224 175
51 ��325 -
1
17(p
4
1 2 '0
1 - 1 -
13 5
Average arsenic concentration (gg/L)
PE SPI
0.5-1.0
1.1 - 2.5
2.6-5.0
5-ol-8.0O Approximate location of Buck Steam Station
MEAN CONCENTRATION BY COUNTY OF ARSENIC IN NC PRIVATE WELL WATER IN 2009 (Ng/L)
ADAPTED FROM SANDERS ET AL. (2011)
F)l
?w
ARSENIC CONCENTRATIONS IN GROUNDWATER
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY AND DAVIDSON COUNTY
NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-1

once ntration of Iron Detected 'in N C Private WelI Water (pg/L), Average 2010
Ail
once Itratlon of iron detected in private weI Is (g f l.)
-� 50.00 300.00
300.01 - ().101D
5 0.01 1,000.00
- 1,000.0.1 12 000.DQ
- 12.000.01 - 1;100,356-. 5
A National Priorities Lit SfteS rePO rti ng icon
O Approximate location of Buck Steam Station
MEAN CONCENTRATION BY COUNTY OF IRON IN NC PRIVATE WELL WATER IN 2010 (Ng/L)
NORTH CAROLINA DEPARTMENT OF HEALTH AND HUMAN SERVICES
FEZ
IRON CONCENTRATIONS IN GROUNDWATER
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY AND DAVIDSON COUNTY
NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
`KN

Manganese Concentraws its Well Water
USGS NUKE Wells ... . t . ■ . �
�■ • + i a . ■ irk w • °
..- '��. .-a-.-•� :�l��a-.�_.�°T . •�'. '�',:.
IPF
a :.:: s` . • *, a ; • °*fie •r •�;
0.
Soil System
Brackish and Freshwater (Marsh System
Broad Basins, River Terraces and Flood Plain System
Carolina 'Slate Bell System
Felsic CrmlIratalline System
— High k1loontain System
monj barge Rrve+r Valleys arvd Flood Plain System
Low and Intermediate Mountawn System
aver Coastal Plain - Parinlico System
■
Lower Coastal Plain 'Wficomico and Talbot System' ' � r V'n`�;.
Middle Coa5lal Plain Sy stem • . , � ; #, •, ' w
Mixed Fels C and Mak System
Organic Sail System
Outer Barks System
Sandhil'ls System
® Tnassiac Basin System
— Upper Coastal Plain and Piedmcnl System
O Approximate location of Buck Steam Station
MANGANESE CONCENTRATIONS IN GROUND WATER AND SOIL REGIONS OF NORTH CAROLINA (GILLESPIE 2013)
FEZ
...
M -
i
Mn pp b
DA0 - 1
* 100.1 - i0 0
• 200.1 - 3000
300,11-5000
500 1 - 1000.0
REGIONAL GROUNDWATER QUALITY - MANGANESE
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY AND DAVIDSON COUNTY NORTH
CAROLINA
DATE
AUGUST 2015
FIGURE
i rem

. �"'.. -A�. y' - y �I: y it '1; r . ��jY„ •a•r.r ', ''#{'�5�"'v- je41. ti'i... s j4 �- ,� ' •.�.� .�P ,r.', .e'r•.' ..Aft
low
'IMFl , + 4 '•4. {'A• - - 1.
i „ '' '� � ;� 4•�� M � �Lsim F ♦ - '
RCL
�WW V;- �Y. + - - t}' •: a` 4r • -r 'V®.:f f 1r.'f� .1`-'.-./ t I_ i l •Rti . ,
A+6 ' , r '1�' }.+ + • • {i'� y'�{ St r �• •��r_^ rl 1+:fl .'�. b fl w ;+ .
A �li` Y^ .• , +� P'YsY7j M
' r = •' , J� fir; ,,�r : P r,"�''r �� '' { rj� • `` : �' ' w. � 5 r ' 4'� A:, y ,
w�'� � ,r � � ' p - ry' .rl ��• ,1 ,+ - `• �i'��,fi x �.,,�� .,,�yt�� Via, . .. N ..� - r . � ,r '�q•.qy,�-� , •+�',,: eA l: a .. - "''r • w a
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f{ .� 4• 4# 1��. v w' 'r' f.- •. J�'�v ;al.� �; v., 'a �•1 .\: �,.., �f,sy.•� � 9 r�' y i�'. *µ ..� ..':. .'°i .a r
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P°R'ir- �� a - .r. .,ti •,yts.. ,�� �.{ �"� .�R'� �,. t ,::K �I .i:,.A�''!.r'' ti•-.t+''. r, � .�1•� � •�'y, 3',�:�:' �`��`xr .fti +
r �• L �. ry , IMF
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, �` � � � _ i..- • ,C _- .�- •i% � i � �ti i. {�Y.-�R • ,,.R•� � � �„ j,; f tT � .i r .� r 2:•' `y, _ • x o'•
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or
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:
• { 1; �`>'/.�''. dot 1. _x.� r 'Iff
its. 4 • + �' "�+ L q•t'
• -1 fit("} a,y.� 7°
Legend
lvo- t"
Buck
ar � � •q
,,�. TL• if#','Y r �n � f� � 4� �1� ._r/rf-it - k 4n ^1 �Y.\Ga �
l�• + •} ,e ^k ...r '' :/ _.; ~ 4 � .54 y"{ 11K � �' e � " ® '�.,`.` .` •'• t t°�x • `tN •.i% ..'•i , ,� y Manganese•1 0 1
`� ,.f � � f .� - r-r � � �4 -[ �•=E a'� � -r�. P'�� �' ' P - a r • �..Yg, , +5,-- z•'�• j j r +q�F oc
} • � 1r{`Y 9e Yc i { v. r w y t fi - y )f (`.'. i, %/ �l i `j L �� A e 1 1 11
-100.00
Via' 100.01 439.90 A
.• ��i" �'� ..ram.. .. ����� a ��.

12Vw 110°W 1000W 90°W 80" VV 70°W
40° N
30O N
20ON
D.
ThalliumTI - C Horizon
• a '.
4P 9-1
0
it q
w � �
r i t• • •
,I
Aw
I p$
• w 'R _ Y
* • r • a
EXPLANATION r /
TI n11
PERCENTILE mplkq
• a
90 to 100 0.7 to 4.3
70 to 90 0.6 to 0.7 �s •
50 to 70 0.5 to 0.6 t`
40to50 0.4to0.5
20 to 40 0.3 to 0.4
10to20 0.2to0.3
0 to 10 <0.1 to 0.2
0 125 250 500 KILOMETERS
0 125 250 500 MILES
. Approximate location of Buck Steam Station
Ease map from U.S. Geological Survey digital data
Lambert Conformal Conic projection
Standard parallels 33'N and 45'N
Central Meridian 96°W
Datum NAD 1983
THALLIUM CONCENTRATIONS IN C HORIZON OF SUBSTRATE
USGS MINERAL RESOURCES DATABASE
FEZ
THALLIUM DISTRIBUTION IN SOIL
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTYAND DAVIDSON COUNTY
NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
WIN

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4 a �-
LL
9 a L4 34P VLIZ

FLUSH -MOUNT STEEL
LOCKABLE WELL PLUG
w1m,
WELL MANHOLE COVER
2'x2'X4" CONCRETE WELL PAD
-EXISTING GROUND
` - STEEL MANHOLE SKIRT
PORTLAND CEMENT AND
BENTONITE MIX
GROUT SEAL
TO SURFACE
WELL CASING
(2-INCH DIA. SCH. 40 PVC)
8-INCH DIA. BOREHOLE
----(FOR
DEEP AND BEDROCK
OUTER CASING (6-INCH DIA.
SCH. 40 PVC FOR DEEP AND
BEDROCK WELLS)
TYPICAL FLUSH —MOUNT WELL COVER
SCALE: NTS
4-FT
ROTECTIVE WELL VAULT
ITH LOCKING COVER
?-FT MIN. HEIGHT)
2'x2'X4" CONCRETE WELL PAD
PROTECTIVE BOLLARD FILLED WITH
CONCRETE AND PAINTED YELLOW
—0 (TYPICAL)
TYPICAL PROTECTIVE BOLLARDS
SCALE: NTS
WELL PLUG
PROTECTIVE WELL VAULT
WITH LOCKING COVER
(2-FT MIN. HEIGHT) 2'x2'X4" CONCRETE WELL PAD
-EXISTING GROUND
GROUT SEAL TO SURFACE
WELL CASING
(2-INCH DIA. SCH. 40 PVC)
�I
+
----�BENTONITE SEAL
zF
I
TOP OF SCREEN
FlLTER SAND
O
2-INCH DIA. SCH. 40 PVC SCREEN
_
0.010-INCH SLOT) WITH PRE -PACKED
4_.
j:x..
FILTER SAND
�rY
THREADED PVC CAP
TYPICAL SHALLOW MONITORING WELL (Single Cased)
SCALE: NTS
PROTECTIVE
WITH U
(2-FT
a
I
v
a
in
;RETE WELL PAD
3 GROUND
TO SURFACE
SCH. 40 PVC)
BOREHOLE
4G (6-INCH DIA.
C) SET APPROX.
) PARTIALLY
ROCK
EAL
EEN
SCH. 40 PVC SCREEN
SLOT) WITH PRE —PACKED
\_THREADED PVC CAP
TYPICAL DEEP MONITORING WELL (Double Cased)
SCALE: NTS
NOTES:
1. MONITORING WELLS WILL BE CONSTRUCTED IN ACCORDANCE WITH 1SA NCAC 02C .0108 STANDARDS OF CONSTRUCTION: WELLS OTHER THAN
WATER SUPPLY.
2. PROTECTIVE COVERS TO BE PAINTED BRIGHT YELLOW WITH WEATHER RESISTANT PAINT.
3. WELL TAG IDs TO BE ATTACHED TO WELL PROTECTIVE COVER WITH MECHANICAL RIVETS OR SET INSIDE FLUSH -MOUNT WELL COVER.
4. PROTECTIVE BOLLARDS (CONE -TAPERED, FILLED WITH CONCRETE, AND PAINTED YELLOW) ARE TO BE INSTALLED AS NECESSARY FOR WELLS LOCATED
IN AREAS WITH NEARBY VEHICULAR TRAFFIC.
S. SLOPE 2' X 2' CONCRETE PAD SURFACE UPWARD TO PROTECTIVE COVER TO PREVENT PONDING WATER.
6. WELL ID TO BE ETCHED IN 2' X 2' CONCRETE PAD.
7. ALL CONSTRUCTION MEASUREMENTS ARE APPROXIMATE.
F)�
PROTECTIVE WELL VAULT
WITH LOCKING COVER
(2—FT MIN. HEIGHT)
if)
z
s
WELL PLUG
2'x2'X4" CONCRETE WELL PAD
-EXISTING GROUND
GROUT SEAL TO SURFACE
WELL CASING
(2-INCH DIA. SCH. 40 PVC)
8-INCH DIA. BOREHOLE
OUTER CASING (6-INCH DIA.
SCH. 40 PVC) SET APPROX.
1-FOOT INTO COMPETENT BEDROCK
BENTONITE SEAL
TOP OF SCREEN
FILTER SAND
2-INCH DIA. SCH. 40 PVC SCREEN
(0.010-INCH SLOT) WITH PRE -PACKED
FILTER SAND
THREADED PVC CAP
w PORTLAND CEMENT AND BENTONITE
GROUT MIX IF REQUIRED
BOTTOM OF BORING
TYPICAL BEDROCK MONITORING WELL (Double Cased)
SCALE: NTS
TYPICAL WELL CONSTRUCTION DETAILS
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
10-8

GWA-65 \ GWA-6BR
(IINA-125 I ONA-12BRU
GWA-6BRU
GWA-5S I GWA-SBRU
yte (Il Anatyte (p9/L
Cobalt 1.7 Iron l,i
Iron 2,100 Manganese
zanese 73 Vanadium
Total Dissolved Soli
NW -SOD
Total Dissolved Solids 674,000
t
Vanadium 1.5
r1 _
1
_ _ -
-
Il (JI lAnadybe (N9/L)
/
romium 65.41+ Antimony
Cobalt 8.911 Iron
Iron 4900J+ Vanadium
iganese 820
nadiuml 12.4
GWA-SD
Yt :
nalyte (pg/L)
Cobalt 7.7
Iron 2,220
9anganese 470
Vanadium1.71
GIIIII
Iron 390 Iron
1060%,
d
Manganese 12,200 Manganese
1401O
i
Yf Vanadl
um 0.731 Vanadium
3.71
.. ....
' i
Anatyte (pg/L)
Anatyte (19/L)
} A 0 f�,.:
`,
Vanadiuml 9
Iron 370
4(I
i
r.
'
Vanadium 17.2.
1
►
GWA-22D
III(pg/L)
` `i i♦ )'
Cobalt 1.1
!w ♦ "'
m anese 120
•' S<
'anadium 15.7
_
Al
.)+Anatyte
(Ng/L)
44.7
Boron 1,900 '
1,20
Chromium
13.7
840
Vanadium 12 "
19.3'
ASS-2D A&26
rte (pg/L) Anatyte (1
.�„o�o 7c Vanadium
Boron 18001 Bar
Cobalt 1.81 BI
San anese 130 Ca
Thallium 0.53J
ved Solids 565,000 Manger
Vanadium 304 Vaned
QNA-105 GWA_'0D
Anatyte I_) A.= (I
vanadiurnj 25.3 Vanadiun 1
c
GWA-115 GWA-11D
N_
Anatyte (pg/L) Anatyte ( /I
Chromium 11.7 Chromium 1]
r+ r•..
Cobalt 23.5 Vanadium -
Iron 1,600,
-�
Manganese 110
Vanadiuml 679
pq
All AD-31)
Anatyte (pg/L) Anatyte (Il
^•y
' r " '
Antimon 8.9 Vanadium 12
* ♦ (---
Arsenic 80.1
•
Boron 2,600
' w
Cobalt 2.5
'
Man anese 390
- -
Thallium 0.43
- _
Vanadium 43.3
3.81
MW
I
IACTIVE
ASH
Ironj 3201 Cobaltl 1.
Vanadium 3.1 Iron 78
Manganese E
Vanadium 4.
GWA-1S I GWA-10
c
4 t -x'
W
k
fir
AB -SD
2e (pg/L)
Ioron 1500
rl m 3.8
ACTIVE
A- ELASIN I
SFCOO Nl7 :Y CELI
v ' AS-2D
a,•- ir, Anatyte (N9
Antimon
Cobalt
Iron
it, A
NW-115
I
MW-11D
III[Pg/L)
Anatyte(Ng/L)
Cobalt
2.2
Boron 1,100
Iron
810
Vanadium 1.5
iganese
26C
medium
2.6
ifWA-4S
GWA-4D
Anatyte fil
Anatyte (Ng,
Cobalt 2.21
Cobalt
.`J
Iron 3,330
Iron 3
_
Manganese 79J
Vanadium
Vanadium 10.6
AB-75 AB-75L AB-78RU
yte (pi Anatyte (pg/L) Anatyte (Il
lrsenic 3581 Antimony 9.31 Antimonvi 1.
75.
Al
4e (pg/L)
imony 1.9
rsenic 13
Cobalt 4.6
QNA-28R la1NA-28RU
Anatyte (pg/L) Anatyte Ul
Antimony 19.3 Antimon 2
!w Barium 790 Iron 5'.
Chromium 54.8 Vanadium 7
.r Total Dissolved Solids 1,460,000
A - Vanadium 2.4
IIIIIIIIII
ill AB-4SL AB-48R AB-4BRU
..
MW-13D
.-;.
.
- . Analyte (pg/L)-
Iron 370
Vanadium 7.6
AS-3S
III
BG3S
BG-3BRU
Anatyte (pi
Analyte (pg/L)
Anatyte (pg/L)
Anatyte (pg/L)
ve- ` Cobalt 2.9J
Ironj 3061
Cobalt 20.i
Chromium 10.9
Vanadium 0.86J
_ �.i.r
Vanadium 10.3 r.,„
Iron 447001
Iron 430J
'
Manganese 25
Vanadium 12.8
Vanadium 882
MW-6S
Mill
tyte(pg/I
Ana tyte(N9/L)
alt 4
Vanadium 8.8
` Y - MW-BS I MW-81)
1 _ Anatyte (pg/L) Anab'te (p9/L)
cobaltl 2.31 Cobalt 1.7
l4 Iron 1.500 Iron 1,700
Man anese 180 Vanadium 8.7
Vanadium 10.1
1
l t t t � Jt x
BG1D )� K 4-. ". a'P� a {� e •}t .•'k .i�,i � 4jN��i
4na a /L : 1 r .!`?' . ayfili S W W� X- ♦ t x '4t •d
Ana to L Ana . ... , .. t7,
Vanadium 26.6 BC, 25 BG2D t -+• r f : �
ly (pg/ ) Analyte (N9/L) 4 dr ,_:~ ,�'C i• j ,r .r
' 1 1 Iron 11,900 Vanadiuml 73
Manganese 54 tT.:
Vanadium 0.951 d AOil
/ ,. • i q. 4r s. - .v - �'+_;}a ti.
�i.J"`" � � `r .. �*� r �« �� a! A.rS•{" it.^+.n,+ �S. ` iM'r.. v �yi.rt?, f: � ,
bj�td8'S °•i>' V4'' i 9 rill -A,
500 0 500
SCALE (FEET)
1,000
IIIIIIIIIN
R R R FkWR R _
R R R
R R RR
ROWAN COUNTY, NORTH CAROLINA
Selenium
3BR GWA-3BRU �� z"�� ; �-� `T•3np. r��if
n 0.45 J Iron 480 a,
e
AB-85 A&SBRU
r
7
`a �r
a
IN
Ki
,
`�k y
`emu.v
a" V
tw
Analyte CAS No.
INC 2L
Groundwater
111i
Antimony
7440-36-0
1*
Arsenic
7440-38-2
10
Barium
7440-39-3
700
Beryllium
7440-41-7
4*
Boron
7440-42-8
700
Cadmium
7440-43-9
2
Chloride**
16887-00-6
250,000
Chromium
7440-47-3
10
Cobalt
7440-48-4
1*
Copper**
7440-50-8
1,000
Iron
7439-89-6
300
Lead
7439-92-1
15
Manganese
7439-96-5
50
Mercury
7439-97-6
1
Nickel
7440-02-0
100
Nitrate* *
14797-55-8
10,000
Nitrite as N**
14797-65-0
1 000
Selenium
7782-49-2
20
Sulfate**
14808-79-8
250,000
Thallium
7440-28-0
0.2
Total Dissolved Solids**
TDS
500,000
Vanadium
7440-62-2
0.3*
Zinc**
7440-66-6
1000
t * Interim Maximum Allowable Concentration (IMAC)
** Unit reported in mg/L in standard, converted here to Ng/L to match
units displayed on figure.
All units shown in pg/L
1 - North Carolina 15A NCAC 02LO202 Groundwater Standards (As of
4/2013). Interim Maximum Allowable Concentration shown where no
standard is available for comparison.
NOTES:
U = NOT DETECTED ABOVE THE LABORATORY REPORTING LIMIT.
J = ESTIMATED CONCENTRATION
<3.0 = LESS THAN THE LABORATORY REPORTING LIMIT
J+ = ESTIMATED CONCENTRATION BIASED HIGH
J- = ESTIMATED CONCENTRATION BIASED LOW
GROUNDWATER ASSESSMENT
MONITORING WELL
Q!l COMPLIANCE GROUNDWATER
MONITORING WELL
VOLUNTARY GROUNDWATER
MONITORING WELL
ASH BASIN COMPLIANCE BOUNDARY
ASH BASIN COMPLIANCE BOUNDARY
COINCIDENT WITH DUKE ENERGY
PROPERTY BOUNDARY
ASH BASIN WASTE BOUNDARY
DUKE ENERGY PROPERTY BOUNDARY
STREAM
AUGUST 2015
FIGURE
10-9

,r �r
- •�� �' ¢ � ALL
-
�.�@e
-
a +h +r~
r _ r
•, l�g
:
Fes.
Q
MW l�s to
,�(#®.5U)
4
g GWA4S T
1n1 In1 p%�p( -•00
GWA-78
(
�.. BASIN OLD,
_ PRIMkRY CELL ACTUE ASH BASIN'
J a Y? tit Q'
SECONII�RY CELL
i.
s
,
n'.
i+ r-
SV 11� Nw
,�,
a • t yy
T
1
GWA14S
Mw 9S
ASH
GWA ®� ACTIVE STORAGE
�� �� ��Oe��➢ SH BASIN
PRIIIYCELL _ A8
t
Sl
ZZ
300 0 300 600
vw
LEGEND:
-- —m
L
NOTES:
r1• m!•_I
N
NN N
N
N
N
N
N
N
N N
N
N N
N
N N
N
N
N N
N
N
N
rgJ`d
h�AJ
N N N N N
N N NN N N IN
N N N N N N
N N M N N
N NN NN N N N N N
N N NN
N N N N N VW M
NV N NN N N
NV N M AN
N N N N NCI N
N N N N IN
N N ICJ Nm
N N N N N
ANTIMONY ISOCONCENTRATION CONTOUR MAP - SHALLOW WELLS (S)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N Nj N
101M
N
N INI
1

.1y:.
3
,.l
Y�
3
4
w& .
#ar
� J

�r
.' 4
k,
l
1 'N
ZA
41
Ow
fi
adF :LIT �`� •. �� .:I. _..—. `1" ��
� -V'
l,fs rr ". �: ,I I .4 •,
1
y
e
fy�
a i
� r.
i•�yr
•
a
_ 14
.,
r
Z iAQ LJ G )
Y� ASH
AC ASH �����
BAUN PRIMARY CELL
pr' SOIL
.� }*,' �"'" r — _ e p$1a.M, -'IM' Fes. { w :� "�� '�. r s' A'w,'"•
s
,
Ok
9 A
_
9
k
t
a
Nw
tV
i i yyjj
s
i` .a• � a
Y � 'ro.. •'�ks
i
n n
,
t
y
r e c r
f-21
300 0 300 600
vw
LEGEND:
N
� � � m
_v
NOTES:
ME
N
NN N
N
N N N
N N N
N N N
N N N
N N N
N N N N
N N N N
N
rgJ`d
h�AJ
J
v
,i ,} A H
d
x�.
1 ♦�
t
xa.
v. t,
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N Nj N

LEGEND:
N N N
N N N
N N N
N
N N
N N N
N N N
N N N
N N N N
N N N N
ta
d
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SOIL
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m MIX 7Y
17
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NOTES:
N PW NN &N
jor
N N N NNN
6
N N N N N N N
N N NN N N N
N N N N N N N
N N W N N N N
N NNNN N N N N N
N N NN
Er
N N N N N VN M
yy (<0.5u)
(0.76 w N M N N
NV N M 4W
N N N N NpiN N
N N N N IN
N N m Nm
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300 0 300 600
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del
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N
N
N N
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N
N
N
N
N
N
N
N
N
N N
N N
N
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N
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300 0 300 600
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N
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7-7 IT!% 'F NOTES:
LEGEND:
N
N
N
N
N
N
N N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N N N N IUN
N N N NNN
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N N N N VW PW
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300 0 300 600
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LEGEND:
C
o,d
Y
---
NOTES:
ME
N
NN
N
N N N
N N N
N N N
N N
N N N
N N N
N N N
N N N N
N N N N
N
N N INN
I`pJV
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NN N N IN
N N N N
N N
N N N NN
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N
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-- —m
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NOTES:
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N N N
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BUCK STEAM STATION ASH BASIN
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N
N
N
N
N
N
N
N
N
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N N
N N
---- N N N
N N N
N N N
N N N N
N N N N
NOTES:
NN
N N N
N
N N NN
PAIN
"NNNN
N N N
N NN
N N
N N
N N VW PW
NV
N M
N N
NV
N MI N
,
N
N N
N NpN N
N
N N N IN
N
N
m Nm
N
N N
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NOTES:
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N
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N
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N N N
N N N
N PW
N
N
N
N
N
N
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N
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N
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N
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N
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300 0 300 600
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300 0 300 .ii
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LEGEND:
N
N
N
N
N
N
N
N
N
N N
-- N N N
N N N
N N N
N N N N
N N N N
-sew
K p' xx
r.> P
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N+N*tm
NOTES:
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N N N 4"
N NNNN
N N N N
N
N N NV
N
N N N
N VIN M
h«
NV N
M N
N
NV N
MI 4W
N N
N N Np4N
N
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N IN
N
N m
Nm
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N N
N
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C
N
N N
N
M
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N
N
N
----
N
N
N
N N
N
N N
N
N N
N
N
N N
N
N
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NSJWI M N
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NOTES:
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N N N 04
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N Nj N

r
LEGEND:
.unman Aaa
N N N
N N N
N N N
N MJ
N
N N
, . - 9. P ,1 10.24J 6 L A 6J¢ (0.4 D➢ — — — — N N N
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NDI
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6
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LEGEND:
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N
N
N
PW
N
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N N N NNV
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BUCK STEAM STATION ASH BASIN
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N
N
N
N
N
N
I
N

C:Rs �u-" - --- --

300 0 300 .ii
LEGEND:
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N N N
N N N N
N
N
N
N
---- N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NOTES:
NN NMN
N N
N
NNN
N
N
N
N N N N
N
N
NN N
N IN
N
N
N N
N
N N
N
NW
N
N NN
N
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N N
N N
N
N
N NV
N
N N
N
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NV N
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N N N NV N
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NV N M AN
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NV N MI 4W
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N PW
N
---- N N N
N N N
N N N
N N N N
N N N N
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N
N
N N N N
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NN N
N IN
N N
N N
N
N N
N N M
N
N N INI
N NN NN
N N
N N
N
N N NN
N
N N
N
N VW M
NV N
NCI
N
N
NV N
M AN
N N
N N
NCI
N
N N N
N IN
N
N
ICJ
Nm
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N
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N
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N
N
N
N
N
N
---- N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NOTES:
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N N N 4"
N NNNN N N N N N
N N NV
N N N N N VIN M
NV N M N N
NV N MI 4W
N N N N NpiN N
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N
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N
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N
N
N N
N
N N
N
N N
N
N
N N
N
N
NOTES:
NN NN
N N N N1J�d
N NNNV N N N N N
N N NN
N N N N N VW M
NV N NCI N N
NV N M AN
N N N N NCI N
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N N
N N
---- N N N
N N N
N N N
N N N N
N N N N
N
IF NOTES:
k
N NNNV N N N N N
N N N N N VIN M
NV N fW N N
NV N MI 4W
N N N N NpiN N
N N N N IN
N N M1 Nm
N N N N N
N N ZN
MAd
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N N
N N
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N N
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N N N
N N N
N N N N
N N N N
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GWA �9
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N N N
N N N
N N
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N N N
N N N
N N N N
N N N N
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Nqm Vt, NX
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SULFATE ISOCONCENTRATION CONTOUR MAP - SHALLOW WELLS (S)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
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N

300 0 300 .ii
LEGEND:
N N N
N N N
N N N N
N N
N
N
N
---- N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NOTES:
N N N N*JN
N N N 4"
"NNNN N N N N NN
NIM NV
N N N N N N VW W
fW N M N N
NV N MI 4K
N N N N NpgN N
N N N N IN
N N Ml Nm
N N N N N
SULFATE ISOCONCENTRATION CONTOUR MAP - DEEP WELLS (D)
del
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN lN
N Nj N

t
;
{
R
i�e
i
300 0 300 .ii
LEGEND:
N N N
N I#1
N
N N
---- N N N
N N N
N N N
N N N N
N N N N
NOTES:
NN NNi4N
N N N �N
"NNNN
N N N
N NN
N N
N N
N N VW PW
41 ;k
NV
N MI N
N
N N
N NpN N
N
N N N IN
N
N
m Nm
N
N N
N N
SULFATE ISOCONCENTRATION CONTOUR MAP - BEDROCK WELLS (BRU AND BR)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N Nj N
IN
I<

yam,
F
kl
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vw
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-- —m
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N
NOTES:
N N N
N N N
N N N
N
N
N
N
N
N
N N
N
N N
N
N N
N
N
N N
N
N
N
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N N N NNN
N N N N N
N N NN N N IN
N N N N N N
N N M N N
N NN NN N N N N N
►�6,
N N N N N VW M
NV N NN N N
NV N M AN
N N N N NCI N
N N N N IN
N N ICJ Nm
N N N N N
101M
N
N INI
THALLIUM ISOCONCENTRATION CONTOUR MAP - SHALLOW WELLS (S)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN lN
N Nj N
N

LEGEND:
N N
N N
N N
— N N N
N N N
N N N
N N N N
N N N N
N
UUIL
ST RAGE f ,
f m
U)
1
NOTES:
NN M"
N N N
e NtP srN fir 't.. $ 1 Yt
cw
< :uj (<O.9 UJ)
300 0 300 .ii
C
N NNNN N N N N N
N N NV
N N N N N VIN M
NV N M N N
NV N MI 4W
N N N N NpiN N
N N N N IN
N N Ml Nm
N N N N N
N
N
N
THALLIUM ISOCONCENTRATION CONTOUR MAP - DEEP WELLS (D)
del
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN lN
N Nj N

,4
0
I Ai
r i
rt
k
V
r'i
ti
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a
r
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1111*14,1113
N
----- N N
-- N N
N N N
N N N
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N N N
N
N
N
N
N
s " < PI#iifJ N
' W< xim N
® Pm#t#fJ N N N N
mmm N
a I#ii#J N KV N X
NOTES:
N N N N rt< N\
N N N N rt< N
N
m
N
N N N
N N
N N
N N N
P4I}J
N
N N
N W
N N< X
M
N
N
N N
N
N N
`
rM
N
N N N
N R<<<WX
m
N N
N N
N< u
N
N N N
u N
rVi}J
N
N
N N
N
N r4v • X
=tiv';
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N N
N
N
i
THALLIUM ISOCONCENTRATION CONTOUR MAP - BEDROCK WELLS (BRU AND BR)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N �N N
N <N
�C

i
LEGEND:
N
N
N PW
N
N
�" '- t ,¢ > t y '' �14 x� t,'F 'c+rf y +' ,y,r4} xaj•. a «� y 'Y „"" . N N
G 0 VY Ne 78 Al-..� Ag � 4 � . � ` � � ��y��" • v�'bi+'{ �� �"�y�"..�HZYJ' \�14 y ��f'"'�{ �
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f - is 5 i ��• Yf TS�
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9
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r
N N N
l000
:= N N N
r.
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N N N N
GWA.43
"` � '? '•' � _�. ram'
- G i
µ GWAl®S
(L
d
w
W
h�' mpLL
cn `
t
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i r r sit
U I r7
AS6110 BASIN
PRIKRRY CELL
N
N
N
Lo
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r
NOTES.
r
,
w __ _ " _ N N N
N ..
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r
,
,
N N NN N N IN
ow
r
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vw
N
N
N
TOTAL DISSOLVED SOLIDS ISOCONCENTRATION CONTOUR MAP - SHALLOW WELLS (S)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN lN
N Nj N
N

-u
0
eJ
0
I
FrF Z1,2,000
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mi,000
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as
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SOIL
STOPAGE
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N N N
N N N
N N
N
N N
N N N
N N N
N N N
N N N N
N N N N
k
,lorl
Wmm N N
Nq+NM VUNX
NOTES:
N N NWN
N N N
kP
"NNNN N N N N NN
BrR-2D'
HIM m�
147,000
N N N N VW PW
44NON
NV N M N N
NV N M N
N N N N NpN N
N N N N IN
N N m Nm
N N N N N
300 0 300 600
vw
TOTAL DISSOLVED SOLIDS ISOCONCENTRATION CONTOUR MAP - DEEP WELLS (D)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N Nj N
IN
Iff

47�
F
_ r
,r
14.
Wr
kA
Lo
m
Q
x
LEGEND:
C
-- —m
N N N
N N
N N
N N
N N N
N N N
N N N
sN N N N
N N N N
00
7!
vwl
a y
c
R R N%"
4 Y —2BR
ASH
ACTIVE STORAGE
AS6110 BASIN
PRIKMY CELL
• 0.
i 4
r
��+,
A.......... ..........
§
a
. . . . . . . . . . . . ...
SOIL
Y s STORAGE
aft
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a
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s
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300 0 300 600
vw
N
NOTES:
NN
N N N
N
NRN
J
i NN
f >
:i H
.g A
x�.
1 PX
r
�A
Af
..
P
'rf, I
I
...
m
TOTAL DISSOLVED SOLIDS ISOCONCENTRATION CONTOUR MAP - BEDROCK WELLS (BRU AND BR)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N Nj N
I

r,
/
1
/
/
/
/
y,.�... ,
3
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1 I
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I:• p
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.11
YY ,w
- � �1
i`
wl—
t,
fy
A

300 0 300 600
Rv X
LEGEND:
N N N
N N N
N N N N
N
N
---� N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
11111
W. 1
11111111
111111111
a 1111111
NOTES:
N N N
N N N
N
N N
KV N X
N N°N
N NN
m N N N N N N N N N N N m N N N
P4I}J N N N N W N N X
f'�}J N N N N N N N
pr
ffli}J N N N N N N WX
m N N N N N• u N
f[#}J N N N u N
fVi}J N N N N N N fW X
m N N N N
VANADIUM ISOCONCENTRATION CONTOUR MAP - DEEP WELLS (D)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N �N N
N N

300 0 300 600
Rv X
LEGEND:
Q� N N N
N
N
---�
N
N
N
N
N
N
-
N
N
N
N
N
N
N
_
N
N
N
N
• PI#fJ N
W. xm N
Pm#t#fJ N N N N
mmm N
a PI#iii#J N KV N X
NOTES:
N N N N N•N
N N N N NN
N
'
m
N
N N N
N N
N N
N N N
f#i}J
N
N N
fVI}J
N
N N
N W
N N X
M
N
N
N N
N
N N
N
N N N
N N
WX
m
N N
N N
N• u
N
N N N
u N
C
fVi}J
N
N
N N
N
N fW X
l"•,
m
N N
N
N
y
VANADIUM ISOCONCENTRATION CONTOUR MAP - BEDROCK WELLS (BRU AND BR)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
N �N N
N N
Z

1 12 3 4 5 6 7 8
750
700
650
w
z
z
a
0
600
550
500
A
EAST
WEST
750
700
N
X
I
O
w
651
LEI
W
N
W
z
J
U
550
500
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800
DISTANCE (ft)
F)l
HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, INC 28202-2075
704.338.6700
ISSUE DATE DESCRIPTION
SECTION n
'_GALE: HORIZ 1"=120' 11-1
VERT 1"=30'
PROJECT MANAGER T. YANOSCHAK, PE
DRAWN BY: -
DESIGNED BY: -
CHECKED BY: -
APPROVED BY: -
PROJECTNUMBER 1 000000000246400
DUKE ENERGY CAROLINAS,LLC
DUKE BUCK STEAM STATION
NOT FOR IV ENERGY. COMPREHENSIVE SITE
CONSTRUCTION ASSESSMENT
ROWAN COUNTY NORTH CAROLINA
NOTE:
1. CONCENTRATIONS OF CONSTITUENTS OF
INTEREST IN GROUNDWATER REPORTED IN
UNITS OF MICROGRAMS PER LITER (ug/L)
ANALYTE
NC 2L
GROUNDWATER ]MAC
ANTIMONY
1**
ARSENIC
1
BARIUM
700
BERYLLIUM
4**
BORON
700
CADMIUM
2
CHLORIDE***
250,000
CHROMIUM
10
COBALT
1**
COPPER***
1.000
IRON
300
LEAD
15
MANGANESE
50
MERCURY
1
NICKEL
100
NITRATE***
10.000
NITRATE AS N***
1,000
p H—tfield
6.5 — 8.5
SELENIUM
20
SULFATE***
250,000
THALLIUM
0.2
TOTAL DISSOLVED SOLIDS
500,000
VANADIUM
0.3**
ZINC***
1000
** Interim Maximum Allowable Concentration(IMAC)
*** Unit reported in mg/L in standard, converted
here to 1Jg/L to match units displayed on figure.
All units shown in pg/L except pH which is
standard units.
NOTES:
U = NOT DETECTED ABOVE LABORA"�'R'r
REPORTING LIMIT
1)026jWTAN i1ZKi121111ENIII
3.0
= LESS THAN
LABORATORY REPORTING
LIMIT
J+ =
ESTIMATED
CONCENTRATION BIASED
HIGH
J— =
ESTIMATED
CONCENTRATION BIASED
LOW
? = ESTIMATED TRANSITION ZONE (TZ) BEDROCK
(BR) CONTACT
*DNE = DOES NOT EXCEED
0
IC
0
LEGEND:
WATER TABLE SURFACE (SUMMER 2015)
ASH — ASH
F — FILL
S — ALLUVIUM A
M1 — SOIL/SAPROLITE; N < 50
M2 — SAPROLITE/WEATHERED ROCK;
N ? 50% OR REC 5 50%
TZ — PARTIALLY WEATHERED ROCK;
REC>50% AND ROD <50%
BR — SOUND ROCK;REC >— 85% AND ROD a 50%
CROSS SECTION A -A'
GROUNDWATER ANALYTICAL RESULTS
V. 2" FILENAME FIGURE 10-X.1.DWG SHEET
SCALE AS NOTED FIGURE 10-52

HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
ISSUE DATE DESCRIPTION
PROJECT MANAGER T. YANOSCHAK, PE
DRAWN BY:
DESIGNED BY:
-
CHECKED BY:
-
APPROVED BY:
-
PROJECT NUMBER
000000000246400
NOT FOR
CONSTRUCTION
DUKE ENERGY CAROLINAS,LLC
DUKE
ENERGY.
ROWAN COUNTY
BUCK STEAM STATION
COMPREHENSIVE SITE
ASSESSMENT
NORTH CAROLINA
CROSS SECTION A -A'
GROUNDWATER ANALYTICAL RESULTS
0 1" 2"
FILENAME FIGURE 10-X.2.DWG SHEET
SCALE AS NOTED FIGURE 10-53

1 12 3 4 5 6 7
I
750
700
650
.ee
550
500
450
0
F)l
200
El ee
HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
600
800 1000
ISSUE DATE DESCRIPTION
NOTE:
CONCENTRATIONS OF CONSTITUENTS OF INTEREST
IN GROUNWATER REPORTED IN UNITS OF
MICROGRAMS PER LITER (ug/L)
750
700
650
60D
550
500
C
C
Il
1200 1400 1600
SECTION
SCALE: HORIZ 1"=120'
VERT 1"=30'
1800 2000
DISTANCE (ft)
n
2200 2400
2600 2800
3000 3200 3400 450
LEGEND:
— WATER TABLE SURFACE (SUMMER 2015)
ASH - ASH
F - FILL
S - ALLUVIUM
A
M1 - SOIL/SAPROLITE; N < 50
M2 - SAPROLITE/WEATHERED ROCK;
N ? 50% OR REC 5 50%
TZ - PARTIALLY WEATHERED ROCK;
REC>50% AND ROD <50%
BR - SOUND ROCK;REC >- 85% AND ROD a 50%
PROJECT MANAGER
- DRAWN BY:
T. YANOSCHAK, P.E.
-
DUKE ENERGY CAROLINAS,LLC
CROSS SECTION B-B'
- DESIGNED BY:
-
GROUNDWATER ANALYTICAL RESULTS
CHECKED BY:
-
BUCK STEAM STATION
APPROVED BY:
-
NOT FOR
DUKE
COMPREHENSIVE SITE
4.�
ENERGY
CONSTRUCTION
ASSESSMENT
SHEET
p
V. p-- FILENAME FIGURE 10-X.DWG
FIGURE 10-54
PROJECTNUMBER
000000000246400
ROWAN COUNTY
NORTH CAROLINA
SCALE AS NOTED

HDR Engineering, Inc. of the Carolinas
N.C.B.E.L.S. License Number: F-0116
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
704.338.6700
ISSUE DATE DESCRIPTION
PROJECT MANAGER T. YANOSCHAK, P.E.
DRAWN BY:
-
DESIGNED BY:
-
CHECKED BY:
-
APPROVED BY:
-
PROJECT NUMBER
000000000246400
NOT FOR
CONSTRUCTION
DUKE ENERGY CAROLINAS,LLC
DUKE
ENERGY.
ROWAN COUNTY
BUCK STEAM STATION
COMPREHENSIVE SITE
ASSESSMENT
NORTH CAROLINA
CROSS SECTION C-Cl
GROUNDWATER ANALYTICAL RESULTS
0 1" 2"
FILENAME FIGURE 10-X.DWG SHEET
SCALE AS NOTED FIGURE 10-55

Figures 10-56 to 10-63

moo
Ash Basin Porewater
�,q,
Ash Basin Surface Water
o
®
Background Wells
�
/
c0
QJ
00
oo d
mac,
a
s.
oaf B-2S AB-4
v0
�O
U
,.. MW-6 AB-7 L
AB-55 M AU
10 -
SW-AB2 ryo
B-3
\ W- Ell
SW -AM
`.� AB-7S
AS-8
o -2D W- B
o
�O 00 SO p0 10 O
O
Calcium
CATIONS
ti b Q3� 4e O
Chloride+Nitrogen, NO2 plus NO3
ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
ASH BASIN POREWATER, WATER, AND BACKGROUND
MONITORING WELLS
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-56

moo
Ash Basin Porewater
Ash Basin Surface Water
2
Seeps
y
S-6
4
00
�� N
mac.
i90io
a
0
s.
x�
47J
v0
AB-2 L S-5
AB-4S
oa0
p0
AB-75
W-AB7
AB-3S
W-AB6
a0
ry�
AB -SS
SW-AB2
SW-AB3
O�
O
�O CO SO p0 110 O
O
Calcium
CATIONS
0
O ry0 p0 10O
Chloride+Nitrogen, NO2 plus NO3
ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
ASH BASIN POREWATER, WATER, AND SEEPS
F)l DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-57

'00
®
Ash Basin Porewater
Ash Basin Surface Water
x GWA-6S ro� GWA-9S
�O
0
Downgradient "S" Wells
d
y
00 oo
d
0o
s.
GWA-7S
G�
x
AB-2
AB-4S
p0
p0
oJ0
U�
AB-6S U•. AB-7SL
-3
'20
W-AB6
W-7S
SW-AB2
Ro
AB-7 WA-4
-AB3
AMS
AB- SW-ABt
'.,.
0 ��, SW-AB4 ,'SW -AB 6
O
�O 00 00 p0 110 0
O
Calcium
CATIONS
Chloride+Nitrogen, NO2 plus NO3
ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
DATE
ASH BASIN POREWATER, WATER, AND DOWNGRADIENT "S"
MONITORING WELLS AUGUST 2015
F)l DUKE ENERGY CAROLINAS, LLC FIGURE
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA 10-58

Ash Basin Porewater
Ash Basin Surface Water
0 0 Downgradient "D" Wells
y w
a
Q \ G3
dory O AB-1 O k2�
0 o d
mac.
a •:� GWA-9 s. G3
x� GWA-8D
AB-2 L AB-4S �O
(j B-7S
W-
AB-
AB_ W-AB
�0 ry0
W D -7S
SW -AB
GWA-22 W-A81
AB -SS 7
-A84
O
100 MWi7UV/
\ 100
WA-1
MW-10D
B-2D
ryo
80
O� GWA-8D 80
�
GWA-9D
AB-1D
b xo
p
C� 60
xP AB-10D - 60
N
ONE.
AB-4S %
N
�]`a0
MW-13D
Uj AB AB-2SL
AB-5S
MW-8D G3
�. GWA-71D '
MW-10D -
' GWA-8D
_ W-AB7
MW- 00
O SWAM
40
- AB-4S
Q' AB-35 ` AB-7S W-AB1 SWAM
40
-
GWA-11D
GWA-1D MW-9
AB-3S
WA-10D
S -AB
AB-8S
SW-AB1
SW-AB4
GWA-22D
SW-AB4 00
O WA-0D
20 AB-5S
AB-3D SW -AB
20
.SW -AM
GW -11D
AB-SSL /
AB 2SL AB- D
SW-AB2
AB-8
AB-2D
AB 7SL
- SW AB3
GWA- 0
\ /
GWA 1D GWA-7D
SW AB7 O
MW-13D `
0
SW AB6 „' O
MW-81D
MW-7D
0
O
60 p0 GWA-4D -0 O
O
ryo b0 00
00 OO
Calcium
Chloride+Nitrogen, NO2 plus NO3
CATIONS
ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
DATE
ASH BASIN POREWATER, WATER, AND DOWNGRADIENT "D"
MONITORING WELLS AUGUST 2015
F)l DUKE ENERGY CAROLINAS, LLC FIGURE
BUCK STEAM STATION ASH BASIN

�Oo
Ash Basin Porewater
Ash Basin Surface Water
�10
2
Downgradient "BRU" Wells
w
4
Q
3x
GWA-6 R
00 00
�C" p
�s.
4
�...... AB-2 7J
�O GWA- BRU, AB-4S
oa0 p0
U� ,....,...
AB-5 AB-75
W-AB
AB-3S W-AB6
ao
AB-7S i AB-7BR SW-
do
AB-4 RU % SW -AB
AB- W-AB
GWA-12BRU SW-AB4
O 111GWA-313RU
O
�O 0O 00 p0 a0 0
O
Calcium
CATIONS
0
O ry0 p0 00 00 00
Chloride+Nitrogen, NO2 plus NO3
ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used I of nitrate and nitrite).
DATE
ASH BASIN POREWATER, WATER, AND DOWNGRADIENT "BRU"
MONITORING WELLS AUGUST 2015
F)l DUKE ENERGY CAROLINAS, LLC FIGURE
BUCK STEAM STATION ASH BASIN 10-60
ROWAN COUNTY, NORTH CAROLINA

moo
Ash Basin Porewater
Ash Basin Surface Water
�
Downgradient "BRU" Wells
w
3x
� 00
GWA-6BRU
N
0C
00
SON
A
s.
v0
AB-2SL
AB-45
oa0
a0
U�
A- BR
AB-5S
AB-75
SW -AB
AB-3S
SW -AM
a0 AB-7
SW-AB3
O
SW -AB
SW-AB4
o
O
�O 00 00 p0 10 O
O
Calcium
CATIONS
Chloride+Nitrogen, NO2 plus NO3
ANIONS
0
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
ASH BASIN POREWATER, WATER, AND DOWNGRADIENT "BR"
F)l MONITORING WELLS
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-61

r00
Background "S" Wells
GWA-6s
Downgradient "S" Wells
`�o
roo
n
�O
y
w
G3
Q GWA-12S
GWA-9S
k2r
�Ory 6,
O
O
Io N
GO
/ s.
G3
GWA-7s
c
U
`MW-95
MW-11S
MW 6S
'2
O MW-7S �
O
N
GWA-4S
GWA-IS
0 GWA-3S \
MW-8S BG-1S,
O
GWA-10S 'J GWA-5S
100
n 100
GGWA--6S
80
ryo
O� r GWA-9S 80
GWA-12S'
�F MW-7
i
a0
c
GWA 7S Ni
P
v°c 60
M S
0�
e
60 dr
N
-
Gi
GWA-12S.,
40-GwA-7S
GWA-1S
AB-ss
00
O MW-9S
40
� GWA-4S
GWA-6S
GwA-1os
MW-115
U
MW 11S
,.;
MW-9S
BG-1S
GWA 5S
20 GWA-9S
GWA-35
00
GWA-15 20
GWA-10S GWA-3S AB 9S
WA-4S
GWA-SS
00
MW-8S MW 7S MW 6S
r0 BG-1S
r0 00 00
O
DO
1O O
0
O ry0 p0 00
Calcium
Chloride+Nitrogen, NO2 plus NO3
CATIONS
ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
DATE
BACKGROUND "S" MONITORING WELLS AND DOWNGRADIENT "S"
MONITORING WELLS AUGUST 2015
F)l DUKE ENERGY CAROLINAS, LLC FIGURE
BUCK STEAM STATION ASH BASIN 10-62
ROWAN COUNTY, NORTH CAROLINA

moo
Background "D" Wells
Downgradient "BR" Wells
�O n
y w
J
dory O AB-1 O k2�
o � d
mac.
a s.
D
x�
0
WA -SD �O
U�
-9D W-11D
AB-100 /
'O GWA-1 \f NO
O -- O
MW-6D
AB-2BR AB-
100 �\MW-7D
wAaD 100
GWA 10D
AB
O BG-i D' M W-10D
80 ry ., UO� `J 80
cP �
.JF OG / C GWA 8D.
b0 �kA �
p D Ni
A 60 0� PAs D 60 N�
t]`a 9'T UO GWA-BD
MW-6D p4j AB-10D
MW-1 OD MW-8D O OC Mrnn rl
GWA-SD 0 �J O � �
40 MW 11D GWA-7D 40
AB
MW 1D MW-7D GWA-1D
D
MW 9D
GWA-11D VW
MW-9� Gw�� O AB-3D
GWA-22D 8 2D
20 AB-1 OR 20
BG 2D
GWA-9� � � GWA-4D AB-26R � GWA 11D
AB-3D GWA-10D BG 1D1GWA-22D
A -ID AB-2D AB-2D MW-13D.
O
GWA 7D - EGAD O O MW-6D MW-8D 0
�p BO B-2BR GO vp 11O O O MW-7D ry0 p0 00 00 00
O
Calcium Chloride+Nitrogen, NO2 plus NO3
CATIONS ANIONS
NOTE: Laboratory reported Nitrate + Nitrate. Used on chart as surrogate for nitrate. Equivalent weight of 54 used (avg of nitrate and nitrite).
BACKGROUND "D" MONITORING WELLS AND DOWNGRADIENT "D"
F)l MONITORING WELLS
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-63

Cation
Anion
Concentrations
Figures 10-64 to 10-73

250000
200000
150000
J
bA
C
L
Y
Qi
u
c
O
U
100000
50000
0
A13-2S
A13-2SL
A13-3S
A13-4S
AB-4SL
A13-5S
A13-5SL
A13-7S
A13-7SL
A13-8S
■ Potassium
29200
18400
21800
5450
13300
6700
3860
5000
12800
11300
■ Calcium
56500
63300
86200
25600
61600
57600
20400
5650
33600
53800
■ Chloride
78700
29100
19200
33000
11400
22800
1900
9500
13300
10500
■ Magnesium
14300
10100
23400
10500
9140
11900
9770
7780
258
13800
■ Sodium
92000
21200
16400
26200
8270
22600
9250
3330
10600
14300
■ Sulfate
203000
125000
105000
82700
135000
69800
10400
1200
77800
39400
■ Nitrogen, NO2 plus NO3
20
20
370
20
210
20
20
160
20
11
NOTE: Blank space in data table above indicates analyte was non -detect.
ASH BASIN POREWATER I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN :)M
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-64

140000
120000
100000
Joao
80000
c
0
v
u
0
60000
U
40000
20000
JL
SW-AB1
SW-AB2
SW-AB3
SW-AB4
SW-AB5
SW-AB6
SW-A67
■ Potassium
8140
15400
18100
9070
7820
12300
11500
■ Calcium
17500
40000
41600
17200
11700
34600
34000
■ Chloride
20900
98300
93700
26300
25700
75100
74300
■ Magnesium
6170
13800
14800
5210
4610
11700
11600
■ Sodium
24800
91300
95800
26200
26000
69900
70100
■ Sulfate
43300
126000
130000
32400
28300
110000
114000
■ Nitrogen, NO2
plus NO3
29
160
13
20
20
20
20
NOTE: Blank space in data table above indicates analyte was non -detect.
ASH BASIN SURFACE WATER I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
F:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-65

40000
35000
30000
Will!]
20000
15000
10000
5000
0
BG-1S
BG-1D
BG-2S
BG-2D
BG-3S
MW-6S
MW-6D
■ Potassium
5000
34100
5000
4700
5000
5000
2640
■ Calcium
13000
26000
5480
18200
1760
2500
12600
■ Chloride
12100
11800
5000
18200
1500
7800
4700
■ Magnesium
6220
1540
4130
3670
716
2920
7370
■ Sodium
12600
26800
5000
16600
2760
2550
6360
■ Sulfate
5800
12600
860
22700
890
670
2400
■ Nitrogen, NO2 plus NO3
20
20
20
1000
220
270
500
NOTE: Blank space in data table above indicates analyte was non -detect.
F:)m
BACKGROUND WELLS I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-66

250000
200000
150000
J
bA
C
L
Y
Qi
u
c
O
U
100000
50000
0
S-1
S-2
S-3
S-4
S-5
S-6
S-7
S-8
S-9
S-10
■ Potassium
6400
3940
3590
5000
5000
2690
5000
3120
5000
5000
■ Calcium
12400
14800
16100
14600
15500
62800
6990
24800
30200
12500
■ Chloride
10400
5400
7000
17900
11400
6400
1500
19200
14100
4200
■ Magnesium
7620
6800
7500
5830
11000
23200
1650
12300
15900
6850
■ Sodium
8850
6530
7710
13700
15200
11400
5000
15300
11400
6400
■ Sulfate
9800
2000
5300
29600
54500
220000
5000
110000
46400
4700
■ Nitrogen, NO2 plus NO3
89
650
300
20
100
370
1600
20
260
250
NOTE: Blank space in data table above indicates analyte was non -detect.
SEEP WELLS I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN :)M
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-67

300000
250000
200000
150000
100000
401111111
0
A13-9S
AB-10S
GWA-IS
GWA-3S
GWA-4S
GWA-5S
GWA-6S
GWA-7S
GWA-9S
GWA-10S
■ Potassium
2750
6920
5000
5000
5000
5000
4840
5000
2580
5000
■ Calcium
7760
3990
9080
13900
12700
5620
86700
20900
30900
22800
■ Chloride
21200
17700
6800
7300
13300
1300
8400
2200
23800
9800
■ Magnesium
6290
3560
8680
6500
4550
2530
30500
9590
15100
17200
■ Sodium
7860
9140
10200
10600
13200
12200
16500
9050
17600
27600
■ Sulfate
7400
10100
9300
8300
19800
7900
280000
63200
123000
10000
■ Nitrogen, NO2 plus NO3
20
34
260
330
20
2600
500
320
73
120
NOTE: Blank space in data table above indicates analyte was non -detect. DOWNGRADIENT S (pg 1 of 2)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN :)M
ROWAN COUNTY, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-68

250000
200000
150000
J
bA
C
C
d
u
c
O
U
100000
50000
0
GWA-11S
GWA-12S
MW-7S
MW-8S
MW-9S
MW-11S
MW-12S
■ Potassium
5000
5000
5000
5000
5000
5000
5000
■ Calcium
2740
52400
5650
19800
26100
14700
4250
■ Chloride
2100
2000
9500
3500
11100
20600
2100
■ Magnesium
1450
32400
7780
13400
9410
10000
1830
■ Sodium
5000
6660
3330
9750
10600
16400
6650
■ Sulfate
860
199000
1200
3800
42200
27800
1000
■ Nitrogen, NO2 plus NO3
64
120
160
760
380
20
860
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT S (pg 2 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
F:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-69

250000
200000
150000
1 1 111111
50000
0
■ Potassium
■ Calcium
■ Chloride
■ Magnesium
■ Sodium
■ Sulfate
■ Nitrogen, NO2 plus NO3
A13-11)
A13-21)
A13-31)
AB-10D
GWA-11)
GWA-41)
GWA-71)
GWA-81)
GWA-91)
GWA-10D
5000
9230
2780
15800
4960
26100
4090
5000
11500
39000
30800
14000
21700
41700
69000
26100
47100
50600
61300
24100
15100
2000
3700
16000
6900
15200
12500
10600
10700
10900
14500
1400
3460
11800
1720
4080
2110
18300
17000
13600
13500
14100
12600
45200
14600
36100
39800
48900
24900
25500
99800
4200
11100
130000
39800
35800
102000
198000
162000
14000
48
260
610
69
1100
20
220
20
20
20
NOTE: Blank space in data table above indicates analyte was non -detect.
F:)M
DOWNGRADIENT D (pg 1 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-70

45000
40000
35000
30000
J
i
25000
c
0
m
c
20000
0
U
15000
10000
5000
Ilk
0
GWA-11D
GWA-22D
MW-7D
MW-8D
MW-9D
MW-111)
MW-12D
MW-13D
■ Potassium
13200
5000
5000
5000
5000
5000
5000
5000
■ Calcium
17100
34600
8920
11100
24900
12400
5220
14000
■ Chloride
8600
7500
3300
6100
11200
10100
2000
6900
■ Magnesium
6710
8820
6020
5670
8560
5300
1870
6220
■ Sodium
13000
13900
12400
7510
10800
12700
5450
8750
■ Sulfate
18400
29200
3100
2300
38500
30700
1000
2700
■ Nitrogen, NO2
plus NO3
320
220
600
2100
260
20
890
2400
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT D (pg 2 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN :)lFIGURE
ROWAN COUNTY, NORTH CAROLINA 10-71

450000
400000
350000
300000
J
250000
C
L
Y
200000
O
U
150000
100000
50000
0
A13-413RU
A13-613RU
A13-713RU
GWA-213RU
GWA-313RU
GWA-56RU
GWA-66RU
■ Potassium
8990
57000
51900
9850
3760
7280
16200
■ Calcium
42400
31800
27800
15300
34800
61700
118000
■ Chloride
5300
13000
7900
4500
14200
11400
9500
■ Magnesium
9200
7010
5530
2600
6940
16800
37200
■ Sodium
15200
39200
17000
16000
71600
15700
19200
■ Sulfate
52300
87800
89800
10100
121000
119000
390000
■ Nitrogen, NO2
plus NO3
20
61
20
680
20
62
270
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT BRU I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN :)M
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-72

600000
500000
400000
J
bA
_
300000
v
u
_
O
U
200000
100000
O-L
A13-21311
A13-4611
A13-9611
GWA-2611
GWA-3611
GWA-66R
GWA-96R
■
Potassium
7790
13300
26200
124000
2690
7600
7400
■
Calcium
102000
48500
31600
481000
32700
201000
84700
■
Chloride
18700
14000
19200
16400
2800
13200
19500
■
Magnesium
630
2040
2540
100
7900
26800
19200
■
Sodium
32500
21300
86200
41400
11000
47700
20800
■
Sulfate
39400
56500
111000
162000
8900
482000
187000
■
Nitrogen, NO2
plus NO3
430
380
53
460
20
20
16
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT BR I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN :)M
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-73

Figures 10-74 to 10-83

I A
12
10
8
0
0.
m
x
6
4
2
0
A13-2S
AB-2SL
A13-3S
A13-4S
A13-4SL
AB-5S
A13-5SL
A13-7S
A13-7SL
A13-8S
0 Sulfate/Chloride Ratio
2.579415502
4.295532646
5.46875
2.506060606
11.84210526
3.061403509
5.473684211
0.126315789
5.84962406
3.752380952
NOTE: Blank space in data table above indicates analyte was non -detect.
ASH BASIN POREWATER SULFATE/CHLORIDE RATIO I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
F:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-74

J
4
3
0
0.
m
x
2
1
0
SW-AB1
SW-A62
SW-A63
SW-A64
SW-A135
SW-AB6
SW-A137
0 Sulfate/Chloride Ratio
2.071770335
1.281790437
1.387406617
1.231939163
1.101167315 1.464713715
1.534320323
NOTE: Blank space in data table above indicates analyte was non -detect.
ASH BASIN SURFACE WATER SULFATE/CHLORIDE RATIO I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-75

I A
1.V
1.2
1
0.8
0
0.
m
x
0.6
0.4
0.2
0
13G-1S
BG-ID
BG-2S
BG-2D
BG-3S
MW-6S
MW-6D
0 Sulfate/Chloride Ratio
0.479338843
1.06779661
0.172
1.247252747
0.593333333
0.085897436
0.510638298
NOTE: Blank space in data table above indicates analyte was non -detect.
BACKGROUND WELLS SULFATE/CHLORIDE RATIO I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-76

Iry
35
30
25
0
m 20
x
15
10
5
0
S-1
S-2
5-3
S-4
S-5
S-6
S-7
S-8
S-9
S-10
0 Sulfate/Chloride Ratio
0.942307692
0.37037037
0.757142857
1.653631285
4.780701754
34.375
3.333333333
5.729166667
3.290780142
1.119047619
NOTE: Blank space in data table above indicates analyte was non -detect.
SEEP WELLS SULFATE/CHLORIDE RATIO I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-77

7C
J J
30
25
20
0
0.
m
x
15
10
5
0
AB-9S
AB-10S
GWA-1S
GWA-3S
GWA-4S
GWA-5S
GWA-6S
GWA-7S
GWA-9S
GWA-10S
0 Sulfate/Chloride Ratio
0.349056604
0.570621469
1.367647059
1.136986301
1.488721805
6.076923077
33.33333333
28.72727273
5.168067227
1.020408163
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT S SULFATE/CHLORIDE RATIO (pg 1 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-78

120
100Cc
80
0
60
40
20
0
GWA-11S
GWA-12S
MW-7S
MW-8S
MW-9S
MW-11S
MW-12S
■ Sulfate/Chloride Ratio
0.40952381
99.5
0.126315789
1.085714286
3.801801802
1.349514563
0.476190476
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT S SULFATE/CHLORIDE RATIO (pg 2 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC AUGUST 2015
F:)mBUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-79

,In
LV
18
16
14
12
0
m 10
x
8
6
4
2
0
A13-11)
A13-21)
A13-31)
AB-10D
GWA-11)
GWA-41)
GWA-71)
GWA-81)
GWA-91)
GWA-10D
0 Sulfate/Chloride Ratio
6.609271523
2.1
3
8.125
5.768115942
2.355263158
8.16
18.67924528
15.14018692
1.28440367
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT D SULFATE/CHLORIDE RATIO (pg 1 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
BUCK STEAM STATION ASH BASIN :)m
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-80

4
3.5
3
2.5
0
m
z
2
1.5
1
0.5
0
GWA-11D
GWA-22D
MW-7D
MW-8D MW-9D
0.37704918 3.4375
MW-11D
MW-12D
MW-13D
■ Sulfate/Chloride Ratio
2.139534884
3.893333333
0.939393939
3.03960396
0.5
0.391304348
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT D SULFATE/CHLORIDE RATIO (pg 2 of 2) I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-81

`YJ
40
35
30
25
0
0.
m
x
20
15
10
5
0
AB-46RU
A13-613RU
A13-713RU
GWA-26RU
GWA-36RU
GWA-SBRU
GWA-613RU
0 Sulfate/Chloride Ratio
9.867924528
6,753846154
11.36708861
2.244444444
8.521126761
10.43859649
41.05263158
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT BRU SULFATE/CHLORIDE RATIO I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-82

YV
35
30
25
0
m 20
x
15
10
5
0
A13-21311
A13-4611
A13-9611
GWA-21311 GWA-31311
GWA-6611
GWA-9611
0 Sulfate/Chloride Ratio
2.106951872
4.035714286
5.78125
9.87804878 3.178571429
36.51515152
9.58974359
NOTE: Blank space in data table above indicates analyte was non -detect.
DOWNGRADIENT BR SULFATE/CHLORIDE RATIO I DATE
DUKE ENERGY CAROLINAS, LLC
AUGUST 2015
lm:)m BUCK STEAM STATION ASH BASIN
FIGURE
ROWAN COUNTY, NORTH CAROLINA 10-83

Stacked Time
Figures 10-84 to 10-143

10000
1000
2L Standard: 700 ug/I
100
µg/L
10
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S
DATE
Boron in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-84
ROWAN COUNTY, NORTH CAROLINA

100
10
2L Standard: 10 ug/1
µg/L
1
0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S I MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S
DATE
Chromium in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-85
ROWAN COUNTY, NORTH CAROLINA

10000
1000
2L Standard: 300 ug/I
100
//ML
-00%or U 09!f�
µg/L
10
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S I MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S
DATE
Iron in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-86
ROWAN COUNTY, NORTH CAROLINA

10000
1000
100
µg/L
2L Standard: 50 ug/I
10
AL
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S I MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S
DATE
Manganese in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-87
ROWAN COUNTY, NORTH CAROLINA

10
9
2L Standard: 6.5 - 8.5 SU
8
7
SU
6
5
4
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S I MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S
DATE
Manganese in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-88
ROWAN COUNTY, NORTH CAROLINA

1000
100
2L Standard: 250 mg/1
10
mg/L
1
0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S I MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S
DATE
Sulfate in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-89
ROWAN COUNTY, NORTH CAROLINA

1000
2L Standard: 250 mg/I
100
MEMO
AFL
TA
mg/L
10
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-10D MW-11D MW-11S MW-12D MW-12S MW-13D MW-6D MW-6S MW-7D MW-7S MW-8D MW-8S MW-9D MW-9S Series15
DATE
Total Dissolved Solids in Compliance Wells
AUGUST 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
Figure 10-90
ROWAN COUNTY, NORTH CAROLINA

10000
1000
30 �0 1250 �♦ 1270
2L Standard: 700 ug/1
100
99/1-
Iff 0■IN
10
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-6D (BG) tMW-10D BMW-11D-I-MW-12D MW-13D MW-3D MW-7D MW-81) —■—MW-91)
MW-6D (BG) vs Deep Wells
Boron (tot)
Duke Carolinas, LLC
Buck Steam Station Ash Basin
Rowan County, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-91

100
2L Standard: 10 ug/1
10
0kA— =Q=
µ9/1-
1.5
1
0-5 --------- 55•5 ■-5 ■-5 5 5 ■•5
9.8
„
2,
1.4
0
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15
May-15
MW-6D (BG) tMW-10D BMW-11D CIE—MW-12D MW-13D MW-3D MW-7D MW-81) —■—MW-91)
MW-6D (BG) vs Deep Wells
Chromium (tot)
Duke Carolinas, LLC
Buck Steam Station Ash Basin
Rowan County, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-92

10000
1000
100
µg/L
10
1 ,
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13
MW-6D (BG) tMW-10D BMW-11D --N�—MW-121) BMW-13D MW-3D
Jan-14 May-14 Sep-14 Jan-15 May-15
MW-71) MW-8D—■—MW-9D
MW-6D (BG) vs Deep Wells
Iron (tot)
Duke Carolinas, LLC
Buck Steam Station Ash Basin
Rowan County, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-93

10000
1000
µg/L
100
10
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14
MW-6D (BG) tMW-10D BMW-11D-I-MW-12D MW-13D MW-3D MW-7D MW-8D MW-9D
Jan-15
MW-6D (BG) vs Deep Wells DATE
Manganese (tot)
Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
Rowan County, NORTH CAROLINA
L
May-15
AUGUST 2015
10-94

1000
■
2L Standard: 250 ug/I
100
+ 64.2
32 ® ® ®
®
■
■ ■ ■ ■ ®
®
■ -
■ ■
14
■
10
8.1
8.6 5.6, °
d 6.7
µg/�
5 �
4..3
41
3.1
2.7�
■
1
■
■
0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12
Jan-13
May-13 Sep-13 Jan-14 May-14 Sep-14
Jan-15
May-15
MW-6D (BG) tMW-10D
BMW-11D CIE—MW-12D
MW-13D MW-3D -MW-7D --*- MW-8D—E—MW-9D
MW-6D (BG) vs Deep Wells
Sulfate
Duke Carolinas, LLC
Buck Steam Station Ash Basin
Rowan County, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-95

10
9
2L Standard = 8.5
8
7.16
7'19
7
6.9
6,85
6.98
o u 6.82
6.76
6,83
6.67 6.67
p H
6.69
6.52
6.69 6.52
6.69
6.58 6,55 6.6 6.58
-
6.35 6.38
6.33 6,4
6.3 6.34
6.2 6.25
_
6.3
6.2 2L Standard = 6.5
6.23 6.15 -
6.14
6.23
6.15
-
6.21
m
6
®
-♦15.94
2
6.14
5.86
5.,
5 -
5
4
Sep-10
Jan-11
May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13
May-13 Sep-13 Jan-14 May-14
Sep-14 Jan-15
May-15
MW-6D (BG) tMW-10D BMW-11D BMW-12D
MW-13D MW-7D MW-81) -■-MW-9D
MW-6D (BG) vs Deep Wells DATE
pH (field)
AUGUST 2015
Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
Rowan County, NORTH CAROLINA 10-96

1000
100
µg/L
2L Standard: 500 ug/1
160 160 . ■ . ■ .
. 170 ■- • 0-150
140
�j140 .._ -- ■" 14 140 .4 r150 ;140 = 131
�� 130 .
130
11
100 - 100
■ ■ 82 ■ ■
■ ■ 74 ■ ■ J5 76
10 -'
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-6D (BG) tMW-10D BMW-11D 0 MW-12D MW-13D MW-3D MW-7D MW-81) —■—MW-91)
MW-61) (BG) vs Deep Wells
Total Dissolved Solids
Duke Carolinas, LLC
Buck Steam Station Ash Basin
Rowan County, NORTH CAROLINA
DATE
AUGUST 2015
FIGURE
10-97

1000
900
2L Standard: 700 ug/1
800
700
600
µg/L
500
400
300
200
100
0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-6S (13G) MW-11S MW-12S MW-3S MW-7S MW-8S MW-9S
MW-6S (BG) vs Shallow Wells DATE
Boron (tot)
AUGUST 2015
Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
10-98
Rowan County, NORTH CAROLINA

30
28
25
20
µg/L
15
13
10
19.6
9 9 9
8
8 $ 8 2L Standard: 10 ug/1
7
5
0.94
0.72
0
Sep-10
Jan-11 May-11
Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-6S (13G) MW-11S BMW-12S —0�- MW-3S MW-7S MW-8S MW-9S
MW-6S (BG) vs Shallow Wells DATE
Chromium (tot)
AUGUST 2015
Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
10-99
Rowan County, NORTH CAROLINA

8000
7`610'
7000
6550
6000
5000
470
µ9/L
4000
3000
2L Standard: 300 ug/1
2000
2000'
1500
1360
-
1000
584
~' 849
571
679 739
0
559
70 157 ��-,
323 366 g 13T
139 227 185 190
56 84 41 — k- T 51
Z/
259 443
].7 — 26 — 247 � 147
195 142 75 201 -f- ���
�S 14 � 68 76+ 37 '_-,.� 70
487 oA —
341
160
69 24 86
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12
Jan-13 May-13 Sep-13 Jan-1-14 May-14
Sep-14 Jan-15 May-15
fMW-6S (BG) t-MW-11S BMW-12S --I—MW-3S MW-7S MW-8S —MW-95
MW-6S (BG) vs Shallow Wells DATE
Iron (tot)
AUGUST 2015
F)M Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
10-100
Rowan County, NORTH CAROLINA

1000
i11:i1(7
µg/L
10
1
Sep-10
260
180
53
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
fMW-6S (BG)—+—MW-11S BMW-12S BMW-3S MW-7S MW-8S MW-9S
MW-6S (BG) vs Shallow Wells DATE
Mangenese (tot)
AUGUST 2015
F)M Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
10-101
Rowan County, NORTH CAROLINA

9
2L Standard: 8.5
8
7
6.54
6.62
6.47
2L Standard: 6.5
�6.25
6.23 6.23 6.29
-
6.13
6.25 6 19 6.11 i.25 6.1 6.25
6.03 6.04 i.19
6 04 6.11
6.03 19 - �- 6
6
6.05
6.11
6.01
` ��
5.96
5,78
pH
5.54
5.41
5.09
5.26 5.32 5.24 -� 5.19
5.13�*5.07}5.12
�
5.23 _' 5.27 �� 5.24
5
�448
4
3
Sep-10
Jan-11 May-11
Sep-11 Jan-12
May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
MW-6S (BG) +MW-11S BMW-12S --I--MW-7S MW-8S
MW-9S
MW-6S (BG) vs Shallow Wells DATE
pH (field)
AUGUST 2015
F)M Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
10-102
Rowan County, NORTH CAROLINA

45000 -
42200
40000
37000
35000
33000
30000 30000
27800
26000
25000 25000
�y 24000
23000
µg/L 22000 22000
'2`100"
20000 20000 200V 200'
17000 18000
15000
15000
13000 _
14000
11000
12000 10000
10000
10000
7000 2L Standard: 250ug/1
4800
5000 3800
3400 3700 2700 3700
_- 3,2003000 1700 2900 2000 2600
1800 2400
2400 1300 940 �500850 850 880 700 120
0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
fMW-6S (BG) BMW-11S BMW-12S --I—MW-3S MW-7S MW-8S MW-9S
F)M4
MW-6S (BG) vs Shallow Wells DATE
Sulfate
AUGUST 2015
Duke Carolinas, LLC
Buck Steam Station Ash Basin FIGURE
10-103
Rowan County, NORTH CAROLINA

700
600
2L Standard: 600 ug/1
500
400
µg/L
300
250
250
250
200
190
180
180 190 190 184
170
170
150 150 150
150
120
137 140 —� 150
\\\\l50
150 . . 164
-
130 �130
.
1340II
�130
100
4- 120
63
�r 39
—�
38
50
36 39
Ir 32
33
32 AL 34
21
0
Sep-10
Jan-11 May-11 Sep-11
Jan-12 May-12 Sep-12 Jan-13 May-13
Sep-13
Jan-14 May-14 Sep-14 Jan-15 May-15
fMW-6S (BG) t-MW-11S BMW-12S --I—MW-3S
MW-7S MW-8S MW-9S
F)M4
MW-6S (BG) vs Shallow Wells
Total Dissolved Solids
Duke Carolinas, LLC
Buck Steam Station Ash Basin
DATE
AUGUST 2015
FIGURE
10-104
Rowan County, NORTH CAROLINA

10000
1000
ug/I 100
10
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Boron, diss #Boron, tot 21- Standard: 700 ug/I -ni- Turbidity, field
100
10
MW-11 D
Boron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STATION
ROWAN COUNTY, NORTH CAROLINA
1
DATE
August2015
FIGURE
Figure 10-105
NTU

100
100
ug/I 10
1
28
13.4 13
12
11 Z13-2 1
9.75 13.8
9
7.76
9.5 7.11
— 8.14
8.01
5 5' S
5
5
5 5 5 5 5
2.5 ` Z25
2.1
X 1.5
10 NTU
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Chromium, diss tChromium, tot 21- Standard: 10 ug/I —A—Turbidity, field
MW-12S DATE
Chromium and Turbidity
August 2015
F)l DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
ROWAN COUNTY, NORTH CAROLINA Figure 10-106

1000 10
81 487`
8.43
323
137 5.21 142 5.29201
185 \�
100
4.24
4.26
—70
ug/I
NTU
3 32
10
2.04
1.63
1
1
0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss tIron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-6S
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-107

1000 100
780
453
413
265 234 218
334
274
216
100
-'O'O\
96 151
83
14.3
9.66
ug/I
8.78
1
10 NTU
s
9.6
7 / 9.3
7.17
4.54
10
3.15
-3.16i
1
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss tIron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-7D
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-108

10000
7610 86.5
100
6559
70.3 4730
47.1
'A
1360 `
4J
1500
lo0o
849
1000
739
27.2
it
h
282
15.3
100
10
ug/I
NTU
11.4
4.48
10
10-4
1
r 1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss Iron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-8S
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-109

10000 100
1700
1000
353
16 214
157
147
1%,
100
Ae00>
10
ug/I
_
NTU
111 " of X 85
4.77 4.78,
\ZOOOOO �\ 3.87
X 12
10
3.55
2.59
1
1
�
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss tIron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-8D
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-110

1000 100
443
341
4
30.6 227 228
190 195
147OOF
100
10
9.9 9.3 70 9.86
8.16
75
6.03 3.82 .
5.59 5
5.31
ug/I
v 26
NTU
.�1 Y
10
1
1
0.91
1
0
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss Iron, tot 21- Standards: 300 ug/I —A—Turbidity, field
FEZ
MW-9S
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-111

1000
100
370
370
v
120
103
100
&
91
15
uFjI
10 NTU
10
X 10
10 A,
4.14
3.04 3.11
2.2
2.1 \1.8
2.04
1.76
1.59
1.06
1.02
1
—. 1
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13
May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss Iron, tot
21- Standards: 300 ug/I —A—Turbidity, field
FEZ
MW-9D
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-112

1000 9.5 10
6.84
5.96
335 279
188
193
104 2.88 98
100 136
110
1.7
61
1.43 — 1•"
L57
1.54 56
X
ug/I 11 1 NTU
0.79
0.46
10 AL
1 0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
Iron, disc Iron, tot 21- Standards: 300 ug/I Turbidity, field
F)�
MW-10D DATE
Iron and Turbidity
August 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
ROWAN COUNTY, NORTH CAROLINA Figure 10-113

10000 100
1000
87
570 1C)
22.9
375
WE
218
.3 316
\40.._��129
N
100ffz
10
ug/I
NTU
119
108 96
6.05 7.76
7.2 00(
/4.83
10
3.09 " 10
2.59
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss Iron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-11 S
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-114

10000
1000�;
3230
7340
F)l
MW-11 D DATE
Iron and Turbidity
August 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
ROWAN COUNTY, NORTH CAROLINA Figure 10-115

10000 100
1010
1000
V
246
13.4 329
157
236
196
13.2
9.75 13.8
ug/I 100
10 NTU
9
119 117
7.76
oef
9.5 7.11
I
8.01
XE
10
2.5 2.56
1 1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss ---*—Iron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-12S
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-116

10000 1000
431
1070 871
1000
994
100
63
281
130
�201 96
/
94
100
ug/I
NTU
83
23.6.
NIL
9.34
NA
10
7.4
10
6:.14 5.18
5.23
4,52
5.87
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss tIron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-12D
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-117

10000 100
1000
27.2
344 /0
257 17.7 370
228,
A
263
ug/I 100
...4
134 9.17 ""w oe zel000'10
NTU
9.9''`
47
7.3 ' 64
4.92
X 4.9
10
4.1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Iron, diss tIron, tot 21- Standards: 300 ug/I —*—Turbidity, field
F)l
MW-13D
Iron and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-118

1000 10
81
8.43
5.21 5.29
X 153
114
100
100 -00 135
-0001, 4.24
4�' 73
73
4 sn
59 35 45
43
ug/I
NTU
3.32
10
2.04
1.63
1 -
1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
Manganese, diss Manganese, tot 21- Standards: 50 ug/I Turbidity, field
MW-6S
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-119

100
10
8.3
70
71
55
36 35
30
4.8 30
X
12
3.6
10
ug/I
NTU
2.43
_ S 2A
2.12
1.99
1.46
1.37
1.14
w
1.04
1
1
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
Manganese, diss Manganese, tot 21- Standards: 50 ug/I Turbidity, field
F)�
MW-7S
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figue 10-120

1000 100
129
100 98
83
000"87
14.3 X 59
41
9.66
ug/I 8.5 _ 45 43 8 78 10 NTU
9.6
19 X i
7 / 9.3
21
19 7.17 18
10
4.54
10
3.96 3.15 �3.O
3.16
1 — 1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
Manganese, diss Manganese, tot 21- Standards: 50 ug/I Turbidity, field
F)�
M W-7 D DATE
Manganese and Turbidity
August 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
ROWAN COUNTY, NORTH CAROLINA Figure 10-121

1000
100
86.5
70.3
360 47,1
48.2
V\
A\
/246
27.2
116 127
,152
100
84 19.5
16 1
15.3
ug/I
10 NTU
11.4 7'
22
6.6
4.48
10
X 5
1
1
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
Manganese, diss Manganese, tot 21- Standards: 50 ug/I Turbidity, field
F)�
MW-8S
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-122

100 88
100
30.6 45
55
45
9.9 9.81
r
9.3
ug/I 10
1 -
Sep-10 Jan-11 May-11 Sep-11
3.01
Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13
Manganese, diss Manganese, tot 21- Standards: 50 ug/I
Jan-14 May-14 Sep-14
Turbidity, field
MW-9S
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
10
1
0
Jan-15 May-15
DATE
August 2015
FIGURE
Figure 10-123
NTU

10000
9.5
10
Owl
5.9'
1000
1130 944
:
2.88
310
1.7
392
1.43 1.79 _
272203 159
228
100
1
ug/I
NTU
0.79
X
0.46
10
1 0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Manganese, diss Manganese, tot 21- Standards: 50 ug/I ---A,- Turbidity, field
F)l
MW-10D
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
Figure 10-124

1000 100
X
4
153
151
139
22.9 106
100
�136 126 102 132 129
111
16.2
14.3
ug/I
_
10 NTU
7.83
9.77
7.76
>6.05��
7.2
4.89 4.9
10
483
3.09
2.59
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
Manganese, diss Manganese, tot 21- Standards: 50 ug/I Turbidity, field
MW-11 S
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figue 10-125

1000
- 1000
ug/I
100
10
313
27' 7\ 202
122
126
123 125 ON\
64
56.2 81
76.8
"j 41
35 37.! 53.3 ;6 56 33.8
27.9
41
X
21
12,8
10
1 -
Sep-10
o
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Manganese, diss — Manganese, tot 21- Standards: 50 ug/I ---A,- Turbidity, field
F)l
- 100
- 10
MW-11 D DATE
Manganese and Turbidity
August 2015
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN FIGURE
ROWAN COUNTY, NORTH CAROLINA Figure 10-126
NTU

1000 100
444
239
316
137
140
100
122
69
68
52
13.4
12 53
EjeO000-
ug/I
_ 9
10 NTU
7.76 K 27
9.5 1 ,,
8.14
8.01
10
2.5 1, /2.56
1
1
Sep-10
Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
X Manganese, diss Manganese, tot 21- Standards: 50 ug/I Turbidity, field
F)�
MW-12S
Manganese and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-127

9.00 10
8.00
8.43
6.64
7.00
3.21
6.00
4.24
4.26
ism
5.00
5.54 5.13
45,41 5.26 <5.24
4.48 �rc
STD
NTU
3 ;
4.00
3.00
2.04
2.00
1.00
1.63 1.36
0.00 1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
tpH 21- Standards: 6.5 - 8.5 STD —A,—Turbidity
F)l
M W-6S
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-128

10
9.00
8.00
7.00
6.98 6.63
6.58
6.6
6.67
6.69
F)l
MW-6D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-129

10
9.00
i
8.00
7.00
6.00
4.8
6.18 588 5.78
6.18 Ow
5.86 5.8
5.00
3.6
STD
NTU
4.00
A A-
3.00
ll .18
2.43
1.99 2.4
2.12-
1.99
2.00
1.00
1.37
1.04
0.00 � � � 1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
tpH 21- Standards: 6.5 - 8.5 STD —A.—Turbidity
F)l
MW-7S
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-130

100
9.00
8.00
7.00
7.16 6•9 6.88
6.76
6.67
6.52
7.19
6.85 6.82
F)l
MW-7D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-131

9.00 100
8.00
7.00
47,1
4&2;
6.00
5.00`
27.2 6.29
AL 6.19 6.25
6.01
_ 5.96
6.05 19.5
6.25 6.25 6.19
6.11 6.03 6'0� 16.9
STD
10 NTU
4.00
11A
NA
At
3.00
6.6
4.48
2.00
1.00
2.04
AL
0.00 1
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
tpH 21- Standards: 6.5 - 8.5 STD —A,—Turbidity
F)l
MW-8S
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-132

100
9.00
8.00
7.00
6.00
5.00
STD
4.00
10 NTU
4.91
F)l
MW-8D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-133

9.00
100
8.00
7.00
5.00
STD
4.00
3.00
2.00
1.00
30.6
6.54 6.25
6.23
9.9 6.62 0- ---,I
6.03 fi.1 6.11
8.26 6.23
6.04
9'3 5.59
7,93
6.223,
3.52
3.01
0.91
0.00
Sep-10 Jan-11 May-11 Sep-11
Jan-12 May-12 Sep-12
Jan-13
May-13
Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
tpH
21- Standards: 6.5
- 8.5 STD
--A—Turbidity
F)l
MW-9S
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
10
1
DATE
August 2015
FIGURE
Figure 10-134
1-011PJ•

100
9.00
8.00
7.00
6.23
F)l
MW-9D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-135

9.00
10
8.00
7.00
6.00
5.98 5.85
F)l
MW-10D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-136

100
9.00
8.00
7.00
6.19
F)l
MW-11S
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-137

9.00
8.00
7.00
5.00
STD
4.00
3.00
2.00
1.00
0.00
Sep-10 Jan-11 May-11 Sep-11
5.79
5.91 5.74
5.94
_ 6 � 56.2
76.8
313
�\ 202
,000 277
126
594
5.76 5.86?
123
5.45
.
5.7' 5.72
37.! 53.3
33.8
27.9
AL
36.3
12.8
Jan-12 May-12 Sep-12
Jan-13
May-13
Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
tpH
21- Standards: 6.5
- 8.5 STD
—A,—Turbidity
F)l
MW-11D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
1000
100
10
1
DATE
August 2015
FIGURE
Figure 10-138
[Zktl •

9.00
100
8.00
7.00
6.12
F)l
MW-12S
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-139

9.00
1000
8.00
7.00
5.00
STD
4.00
3.00
2.00
1.00
6.2
6.17 I
6.23
6.15
-
6.32 6.25
6.07
6.02
63.2
Aw
68.6
23.6
9.34
7.4
i4 23 5.18
5.
4.52
5.87
3.89
3.87
0.00
Sep-10 Jan-11 May-11 Sep-11
Jan-12 May-12 Sep-12
Jan-13
May-13
Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
tpH
21- Standards: 6.5
- 8.5 STD
-A.-Turbidity
F)l
MW-12D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
100
10
1
DATE
August 2015
FIGURE
Figure 10-140
liliti •

100
9.00
8.00
7.00
6.23 6.15
6.14
F)l
MW-13D
pH and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August 2015
FIGURE
Figure 10-141

1000 !li
10
FAM
674
�94
100
mg/I
\":2.73
2.88
2.6
1 NTU
1.7
1.54
1.43 1.79
0.79
10
0.46
1 0
Sep-10 Jan-11 May-11 Sep-11 Jan-12 May-12 Sep-12 Jan-13 May-13 Sep-13 Jan-14 May-14 Sep-14 Jan-15 May-15
--$--TDS (mg/1) —A—Turbidity
F)l
MW-10D
Total Dissolved Solids and Turbidity
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
ROWAN COUNTY, NORTH CAROLINA
DATE
August2015
FIGURE
10-142

m 20,900
le 2,200 .
e 63,200
Dissolved Solids 208,000.
270
cSample Name AS-1S
`Boron
Constituent (pg/L)
3,000
Calcium 124,000
„
Chloride 14,800
.y
Sufate 703,000
.
Total Dissolved Solids 1,240,000
4.
I
I;
1
1
1
1
1
1
r
r
Sample Wmel MW-95
Constituent (pgA)
Cakium 26,100
Chloride 11,100
Sulfate 42,200
To[al DssoNed Solids 184,000
A F
T�
Calcium 3,990
Chloride 17,700
Sulfate 10,100
Total Dissolved Solids 85,000
Sample Name) GWA-105
Constituent (pg/L)
to 22,800
de 9,800
Sample Name GWA-115
Ih 1 Constituent (pg/L)
Calcium2,740
Chloride 2,100
Sulfate 860 J
F r ♦ Total Dissolved Soldsl 30,000
Constituent (pg/L)
52,400
le 2,000
199,000
CTIVE
SH B SIN
PRIM RY CELL
,
n 66,700
e 8,400
a za0,aoo
Dissolved Solids 556,000
Mil L
STOR/ GE
Sample Named MW-3S
Constituent (ua/L)
Tf4
4y ' °
9 eT-"t y 'rib .� �' fae 1 ��, (>'�' W i'
�r A. _i v1 .. 3A�r •:. •' ,. -_ a Sample Name MW-65
y
Constituent (Pg/L)
Calcium 2,500
tg
o �,• ♦ , . +' elr.� > , c _ lid` �dlr 4'�(r v+�rV' i I1 Chloride 7,800
)` 4 s{; �. ' Sulfate 670,
Total DL%olved Solids 34,000
1 I' 1 • t Sample Name 8G-15
i J Constituent (Pg/L) '" ` T �Z ✓ -r.
1 "M Calcium 13,000 �v Sample Name GWA-15
Chloride 12,100 _ - Constituent (pg/L)
1 Sulfate 5,800 a - • Cakium 9,080
+.- ,,
Total Dissolved Solids 115,000 ! Chloride 6,800
1 ` ' Sulfate 9,300
i
♦ Total Dissolved Solids 116,000
+e
Sample Name MW-SS
r Constituent Cil
v
Calcium 19,800G-
1 - Chloride 3,500 • ",'•.N;M a
Sufate 3,800 1•" 5r..q♦ •, rR
Sample Name BG-25i"js
Constituent (pg/L) Total Dissolved Solids 164,000
calcium 5,480 - " .7
t
t
.. - Chloride 5,000
1 - Sulfate 8601
%\ Total Dissolved Solids 51,000 -
500 0 500 1,000
TK U
Sample Hamel MW-7S
Constituent (pg/L)
+ 5,650
e 9,500
Sample Name) GWA-5S
Constituent (pg/L)
m 5,620
Je 1 1,306
Sample Name] AB-9S
Constituent (pg/L)
r
i
I
V
ACTIVE
ASH B SIN
,ONDARY CELL
Constituent
n
410
260
Sample Name) GWA-3S
Constituent (il
Boron
61 JN
Cakium
13,900
Chloride
7,300
Sufate
1 8,300
Total DisoNed Solids
131,000
4,250
2,100
4,000
4,420
9
.10
c
3y :A
)
r
f�
11"
t
Analyte
Abbreviation
Boron
B
Calcium
Ca
Chloride
CI -
pH (field)
pH
Sulfate
SO4
Total Dissolved Solids
TDS
W K K K K K K
W K
Ifs K K K K
V K KK
Kt K K K
KN KK
LEGEND:
K K
K
K
K K
KK K
KK K
K K K
K
KK K
--- K K K
DETECTION MONITORING CONSTITUENTS DETECTED IN SHALLOW WELLS (S) K
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
K KY K 10-143

��!/V Sample Name GWA-70
R,�1 Sample Name GWA-813 Constituent (pg/L)
✓�� Constituent Sample Nam /l.) «
(p9/L) Calcium 47,100 ..•
L, Constituent (pg/L)
'7� - Boron 483 Chloride 12,500 -licall 94,900
Rs Gy Calcium 50.600 Sulfate 102,non
7 , Chloride 50,600 Total Dissolved Solids 316,000 Chloride 5,100
Ro Su ate a"
Sulfate 198,000 i 393,000 � Sample Name GWA-4D
Total Dissolved Solids 450,000 Total Dissolved Solids 674,000 ...tM
-,+ Sample Name MW-3D Constituent (pg/L)
II/ /
Constituent (pg/L) � Boron 220 ]
,, . -� � H r �OCK LAKE) 'Calcium 26,180
YADWIN' RIVER (HIG Baron 690 Chloride 15,200
Y Calcium 27,900
Chloride 11,100 Sample Name MW-11D Sulfate 35,800
Sample Name GWA-9D MENNESulfate 64,200 Constituent (pg/L) Total Dissolvetl Solitls 201,000
Constituent (pg/L) Total Dissolved Solids 201,000 Boron 1,100
Baron 2603 Calcium 12,400
Calcium 61,3003- Chloride 10,100
Chbrde 10,700 Sulfate 30,700
Sulfate 162,000\� `
Total Dissolved Solids 136,000
Total Dissolved Solids 414,000
Sample Name AS-10
Constituent (pg/L)
Boron 380 J
Calcium I 26,...
Chloride
Sulfate 37,800 - --
Total Dissolved Solids 220,000 \ -
Sample Name AB-1D
° °
Constituent (pg/L)
Boron 1,500 J
Calcium 30,800 �.). • °
Chloride 15,100
Sulfate 99,Boo
°
Total Dissolved Solids 260,000 : �t ILI
Sample Name GWA-22D
Constituent (pg/L) ♦.'', I. 2r.4S,f '
Calcium 34,600
Chloride 7,500
Sulfate 29,200 .. .•IV
Total Dissolved Solids 222,000 -
.. � y'
« r '
Sample Name MW-91) {
Constituent (pg/L)
Calcium 24,900
Chloride 11,200 Sample Name MW-12D -
Sulfate 38,500 Constituent (pi
Total DasoNed Solids 180,000 Calcium 5,220 .� r
Chloride 2,000
Total Dissolved Solids 76,000
Sample Name AB-100 ' rehi
Constituent (pg/L) � ... ! •.
Boron 1,900 i
Calcium 41,700 41.
Chloride 16,000
Sulfate 130,000-
Total Dissolved Solids 381,000 -
�-
Sample Name AB-2D� - ''
Constituent (pg/L) 0 ° ..$ ~k.; & t
Boron 703
Boa : .
'D
Calcium 14,000 � -,
Chloride 2,000 '�° '` C'JLcic-Ib - Sample Name AS-2D
SuMate 4,200 Constituent (pg/L)
1 Boron 5301
Total Dissolved Solids 154,000 '• - " -
Calcium 29,300
€: l Chloride 14,900
r - Sulfate 52,000
.� .F Total DissoNed Solids 209,000
-µ.
Sample Name AS-3D
Sample Name GWA-lOD Constituent (pg/L)
Constituent (pg/L) Calcium 20,400
Boron 90 J Chloride 5,3003
Calcium 24,100 Sulfate 44,500
Chloride 10,900 Total Disolved Solids Mono
Sulfate 14,000
Total Dissolved Solids 261,000
WK K KK K K
Y � � n - _ �� K
Sample Name Mw-130 Ifs K K K K
2 I c« i - Constituent (p9/L) w K K K
r £. Tq calcium 14,000 \ Ift K K K
"�, Chloride 6,900 f.
i„ Sample Name GWA-11D SuMate 2,700 K KK
} Constituent (pg/L) Total Dissolved Solids 131,000
Baron 283 a
Calcium 17,100 !•:�. �" Sample Name AB-3D
Chloride 8,600 .�.,° M 'I Constituent (pg/L)
- r Sulfate 18,400 r� Calcium 21,700
( o - Chloride 3,700
Total Dissolved Solids 154,000 - '
Sulfate 11,100
Total Dissolved Solids 160,000 Sample Name MW-6D LEGEND:
r , �, . '>t Constituent (pg/L)
r .,
4'Chloride 4,700 K
iF" 1 s - �r / -Total Dissolved Solids 111,000
K
y� 4 a; c;„ Sample Name MW-SD i,_
n Calcium 11,100 a� - -
. : x r _ K
Chloride 6,1001,
' dam.} }�.
Sulfate 2,300 , --y,-,��« a-'t Sample Name MW-7D ) ' s}„-,S, OF K
Total Dissolved Solids 114,000 u ( - 4 Constituent (pg/L)
t<'I� S r _ ". n a M• 7, Caklum 8,928 OJT K
9 +
Chloride 3,300
SuMate 3,100
, t- ' Total Dissolved Solids 101,000 w
t }`' 9 ,P' - Sample Name GWA-1D r «, •.. KK
.. •- ,.. .' S _ - _ Constituent (pg/L) -, a~.♦ � �.
f ,� 9 4t p f 4;' Calcium 69000-,_ - K K
1 , F" K
4 Y
1 "S. .. Chloride 6 900 :. r '. K
* _ S" 'R n. ' . _ _9' ^� ' �. ' iv - e Sulfate 39,800 - �" K
f �
-:'!' , �, _ Total DisvmNed Solids 239,000 ,. .,,
cpv) s KK K
a
Sample Name BG-10 i �,,. i F��. I ( -'.. �' r, \ ;...w a ",e ,' .. F
Constituent LAa
Boron 383 - rr F. a m
Calcium 26,000 K K K
Chloride 11,800
Sufate 12,600
Total Dissolved Solids 175,000 w ;
z
Sample Name BG-2D
Constituent (pg/L) yt
Lift
Boron 491
Call 20,800 J I Y - S'e `r'3
Chloride 18,200-.: z ti. }�,\`'` `\.A, ..a%°� ~`` .•..z•
_ SuMate 22.700
To[al D"ssoNed Solids 147,000,#
{
. r �"'J..h 4 !a't• , i< tp .y x vPr� `' p
500 0 500 1,000
lK U
DETECTION MONITORING CONSTITUENTS DETECTED IN DEEP WELLS (D)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
Analyte
Abbreviation
Boron
B
Calcium
Ca
Chloride
CI -
pH (field)
pH
Sulfate
SO4
Total Dissolved Solids
TDS
K
10-144

Sample Name GWA-6BR Sample Name GWA-6BRU
Sample Name GWA-SBRU[Chbride
mple Name AB-9BR Sample Name AB-9BRU
�O i Constituent (pg/L) Constituent (pg/L) Constituent (pg/L)tituent (pg/L) Constituent (pg/L)
44
32
QL
ho
Asia
�i�R��F Sample Name GWA-12BRU Oakum 201,000J Calcium 120,000J 600 Boron 790
Boron 350
Calcium 61,700 31,600 Cakium 38,700 _
R Const tuent (pg/L) Chlorde 13,200 Chloride 10,200 19,200 Chlorde 6, 300
Chloride 11,400E
Oakum 16,800 Sulfate 482,000 Sulfate 382,000 311,000 Sufate 94,000
/�ir (, Chloride 3,000 Total Dssolved Solids 1,040,000 Total Dissolved Solids 750,000 Sulfate 119,000
Total Dissolved Salids 374,000lved Solids 446,000 Total DissolvedSolids 455,000
wT Sulfate 15,700
Total Dissolved Solids 138,000
���� Sample Name AB-7BRU
Sample Name AB-6BRU
� H LAKE) Constituent (pg/L) BoronConstituent (p9/L) 140
yADKUN RIDER (HIIGH ROCK Boron 27,
Cakium 31,800 Cakium 27,600 Al
Chloride 7,900 'Y
Chloride 13,000 � Sulfate 89,800
'. Sufate 87,800
Total Dissolved Solids 232,000
Total DssoNed Solids 300,000
Sample Name GWA-9BR
Constituent (pg/L)
Boron 230
Calcium 84,700
Monde 19,500
Sulfate 187,000 J Sample Name GWA-3BR Sample Name GWA-3BRU
Total Dissolved Solids 471,000
Constituent (p9/L) Constituent(pg/L)
Calcium 32,700 Baran 35 ]
Chloride 2,800 Calcium 34,800
VAN Sulfate 8,900 Chloride 14,200
Total Dissolved Solids 165,000 Sulfate 121,00,
Total Dissolved Solid 440,000
1 1
Samp@ Name AB-6BRU � r
Constituent (pg/L) � �
Boron 52 a �`3�1{r s-p_
Cakium 91,000 - rt P', C
Total D'ssoNed Sofds 222,000 �..� s?," • 1y fr �•'.�
Sample Name AB4BR Sample Name AB-4BRU �
Constituent (p9/L) Constituent (p9/L) _
Boron 43 ] Boron 39 ]
Cakium 48,500 Calcium 42,400
Chbnde 14,000 Chbrde 5,300
Sulfate 56,500 Sulfate 52,300
Total Dissolved Solids 226,000 Total Dissolved Solids 242,000
Constituent (pg/Lj Constituent (pg/L) � �a _N-�, t
Calcium 481,000 Cakium 15,300
Chloride 16,900 Chloride 4,500
Sulfate 1Q,00o Sulfate 10,100
` Total Disso Ned Solids 1,460,000 Total Dissolved Solids 196,000
Sample Name AB-2BR a
f1
Constituent (ii 0 '
Boron 59 ] _ v _ ^
Calcium 102,000 Chloride 18,700 • �
Sulfate 39,400
Total Dissolved Solids 425,000
f
,
t/
a �
y • _ o�"JllLS
W KK K K K K K
�.
t
r
{� 4f V K K KKK K
IK'g K KK
y4€ ; KN KK
qz
1%
Sample Name BG-3BRU
f w • � - + ��tTl'aT - ti - P ,^. _d ;�: � � � r n q-(-� �, Constituent (pg/L) LEGEND.
Calcium 10,800
Chloride 2,4003
^,_ _�.� F . ♦ •,s•� � a - +• _ r•`5 :� '�• 4.! Su Mate 11,500 K
4 r" f sr �. _ ,' + .-� - 7 - :n� r '� Total Dissolved Solids 134,000 J K
r� n.y ti... x ¢ t s`4. tp�`I.J r €• lr r a g,:y��Ty,l `
y
KK K
Oi
KK K
:; / ` _ qr.._ of �: • � e � 'h � (rY }6•1 ib 4. K
j S r
'4 t '.` - t, f • r °+ tld F�yi \` 1� M" '4" fn ,4 re_,.. KK K
`r K K K
M, =
y� i'
tt
>
Jr
e w� �. r �.... � 4 4`��^. �.�.ya ..,.� 'i. r •��S'>•'t. r e� A,- .FA.w - Pry ' R"��ix�` " <N l'� �� F�j.'a sW
e.�4
!lk "r "hz
ie", n . . 6. - � o-.re, ., � � �.a.[ �n ie r .�' � e +M: " 6T.,-.1. ���. %• � i YRi�.. ".i �C: 3 n.;n.... N £.`. , i •.r a^' 42t:4
-
,
� (..� .; � /��:, r,l r t•: aE� .':rz. �' <` k }�' ,b ��rn 'i `yt� 'i a t!$f .�.v* 3..'. is ,. jj A s Yy ,'rq„ - _ ,�
:.. ,., _e . r "+. . T v'. {. .- ... m f '^-' � ^S'E w/^ Y. � ✓.L,- 5^. inb ' 1F z, .1r..� w ,'$ �✓'. r , - _
. .J. 4 �" ..r r :, �''�Rr � Np ;�§t }- , .. ��.. ,Tv � • ,t .ftit �'4 �(2 s - �� d '1 - )•` � �Tr �:f '.\
-' Y yf4r ': F'. -�' ,. n..w P.., _,_ -o-: '.=ir tH'.. _�ti `-yt""'ti:. �"''' '' .. si °: "�� �r, Yi^)1 - w•Y ` -�
.4` z'• 2 . � A. s. � tiK k �... 3F1 q`: �,` ,; ' 1 � � ya ��
,e aa� � •. � 4 so- 1� i" ,�, '�,
,,. ..v E' Y. F' � .. ft 1.,gy e x:-. � i.: " L �Y�A-''>�� Y ��� �•�* x• '+fj^ 6�iy ;s1»A� �t` , � ; �� w
r -
1
,
MI tJ
_
i
3i v
500 0 500 1,000
lK U
DETECTION MONITORING CONSTITUENTS DETECTED IN BEDROCK WELLS (BRU AND BR)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
Analyte
Abbreviation
Boron
B
Calcium
Ca
Chloride
CI -
pH (field)
pH
Sulfate
SO4
Total Dissolved Solids
TDS
K
10-145

Sample Name GWA-55 N �IJ vR 1e A �,9O�jN Sample Nam GWA-65 Constituent(pg/L)
�Y Arsenic 0.17 J tR i 4 P
�'� Constituent (p9/L) Barium 52
r
��j Arsenu 0.42 J ..
Chromium 1.4
CobaV(�
r'7 M Sample Name 6WA-125 Beryllium 0.59J Lead 0117
Cadmium 0.11 JIt
Q Constituent (pg/li Molybdenum 0.133
Ck Chromium 42.9 Sample Nam AB-95
'1 Arsenic 0.17J I Selenium 0.21J
Cobalt 5.6 Constituent (pg/L) Sample W-115
Banum 36 Lead 1.8 ' r - Arsenic 1.6 Nam M -
ROCK Cadmium 0.031] - Constituent g/L) ituent (p
HIGH � LAKE) Chromium 0.94 Molybdenum 1.23 - .ra Sample Nam MW-35 Barium 190 Antimony 0.18 J r ,,
YADKIN RIVER ( Cobalt 2 4 - Selenium 0.513 s Constituent (pg/L) Beryllium 0 23 Barium 11
titue A 1
_. Lead 0.29 - Thallium 0.054 ]+ t Arsenic 0.311 Cadmium 0.055 ] F
WA-45Barium 22 1.22Moybdenum 0.22J � }1 Chi2 ] g/L)Cblt 295 017 J0.32 JSample Nam Gig/L) chroBerylmim 0.94 J .Molybdenum 0.17 ] 82Constituent (p9/L) rSample Nam GWA-75 � , ., �; - Chromium 0.94J
Arsenic 0.12 J Constituent (pg/L) ' " - Cobalt 18.4Antimony 0 19] - - Thlli0 16 0.11 JBarium 51 �-L`.:0.52 ] � 0.036 JBerylium 0.13J '"/'Molybdenum 0.28J Barium 88 - 2.51 �•.�zi
Cadmium 0.12 - �' - Thallium 0.074 ] JEWA
Chromium 0.41 r
Beryllium 0.241 t a. Cobalt L2 ]
Cobalt 71.9 $ Cadmium 0.0411 Lead 0.45 J
Lead 0.051 J .0 Chromium 65.4 J+ ' Molybdenum 0.221
Mercury 0.074 J+ . I Cobalt 8.9 1 ,�
Selenium 0.231
Selenium 0.293 Lead 0.533 .ak-,� Sample Nam GWA-35
Thallium 0.059 J Molybdenum 4.5 ] Constituent (pg/L)
-y Arsenic 0.141
Selenium %25 J Barium 89
Thallium 0.028 J
"< Cadmium 0.079 ]
Chromium 0.76 J+
Sample Nam AS-1S ' - Cobalt 2.2
ConstRuent (pg/L) Lead 0.058 J
Antimony 0.223 - _ Mercury 0.0733+
i
Arsenic 6.4 lit
Molybdenum 6.6
A H,
Barium 120
Beryllium 3.71
Cadmium 16
Chromium 8.6 \ -,
Cobalt 332 \ \:% -- "'•',. ..
Lead 1 \
Molybdenum 0.21 J ] _ � .. A A
Selenium 21.2 1
Thallium 0.24 J 1
„q • - C(� Y ` -
ey
+� % _
Sample Name MW 95 « ;_* <- _ r ;_ ««
I_
Constituent (pg/L) , . ,.. - Wq. °L.1-�f Via. r
11)1.h1
Barium 33 � �- :�I ' �., ,r.,,.« #.«
Chromium 0.721
- Lead 0.0523 � . �I �'' /-; _ .-:.. 1
v
VY
Sample Nam AB 105 ""
Constituent W9/L) ;3 _ y t`
` Arsenic 0.84
Barium 220
Beryllium 0.55 ,` _ + a I \
Cadmium 0.0571:- - -
Chromium 3.7 J+ '1 Sample No MW-12S `
Cobalt 44.7 ` f hA' 7, • r'.,
Constituent (p9/L)
Lead 4.2 Arsenic 0.133 #fi
Mercury 0.081 ] :f eaf
Barium 15
Selenium 0.49 ] %w, Chromium 2.1 S„ `",3.
Thallium 0.063 ] - -;5 •?%`a �. �adlt 0.31J 1 " ' �TPX�TM. 1
_ ' Molybdenum 0.4 J
• yy
r
o � .
o. ,o
Sample Name GWA-105 -- ,
Constituent (p9/L)
Arsenic 0.173 ,:
y
Barium 16
Chromium 2.7 'x•.;'•n, 4 _._ '+ i % k `
Mercury 0.078 J+ t cr. i r Sample Nam AS-35
1,
,4 Molybdenum 0.193 i Constituent(pg/L)
nic 5
Baadum 10
i'
Beryllium 2.3
� llLS Cadmium 0.111 W K K K K K K
Chromium r ` W K
Cobalt 20.8 K K
�G T Lead 3J P K K KK K
1<V ,. �:,_ Molybdenum 0.147 s.
1�5it , . . * K K K
1-_ li �,. ...^, x <. ,. w > - - Selenium 10.3
' - Sample Nam GWA
P
Constituent (pg/L)
6k _ ,Arsenic 17 r • r f t 4r J,x:; s KN KK
I�
�,I$�^ 9(,� $~ c 1 Thallium 0.054 J `
r i Barium 61 ; t h .. t i _`3`rF/•? Ft
T. �" - Beryllium J `1 ; -
i % : i°..- _ , ,
Cadmium 0 088
y :#'k �+" w,� ^%,` a,� Gm •alb .e°tAt J 1 �. { r; v' Sample Name MW-6S
1^ r' Chromium 117 Co
, rt ' f»" I * Cakum nst nt (pg/ 2),500 Sample Nam BG-35
L w �ral Lead 10.7 _a, 'rr.. - _ Chbnde 7,800 ConstRuent (pg/L)
Rue
w w • ry a# siZg 3s ~ `�-� '-,/ S L Sultate 6701 Barium 44), LEGEND:
Mercu 0.088 ]+ s f h., �;t, �
i°' i ` Beryllium 0.086 ]
` Selenium 0.65it
a d,'g �. ( t Total Dissolved Solid 34,000
Thallium 0.14 ,(. � - .� .. < , Chro 1.8 ]
�ttfr Sample Name MW-75
mium
„ 1(. - - ,x Constituent (pg/L) Lead 0.0913 K
43 Barium 2fi Molybdenum 0.121
@- i3= Chromium 9.6
Sample Nam MW-85 1.. s, -<. ...K
ConstRuent (pg/L) - r ��- ! Cobalt 0.36] f\
Barium 36 9. « "{ *' r I Lead 0.14 ` t '`-'�' K
Chromium 1.7 J 1 �'�: ".'•' r ' t
4
Cobalt 2.3 . � 1 '�; Y _ :`#._s. e.>. rt .:, �y /rV" ,: �a � K
Lead 0.2 A r ', a - fir,' i� �''v.
Molybdenum 0.191 'S K
i
1 } J p ♦ ?.
Thallium 0.017 J + -1 ] �F KK K
.r ¢ � Sample Na GWA-1S '' `
1 f 9 ^. Constituent(pg/L)
KK K
t Y' Arsenic 01121
1 f k Banum 34`b er "•.
•' " / Chromium 5.3 ]+ . "" - K K K
s yty ` Cobalt K
w Lead
)' / C,. R+ Mercury 0.0867+ '' KK K
r,
i2.2I ` - - ° • Molybdenum 0.19J
K K K
., Thallium 0 021 J
- r eSample Neme BG-25�
Constituent
Arsenic 0.263 ��_-O
.1 n` �.�; t.. •� Banum 55 L,.' QS4 +p «-i s! %i
• px'N
., '
•_ 1 Cadmium 0.025 J ,``
r �• / Chromium 0.42 J+ - iF'iG•a\ w +�, ° y is° _P .�,, p r+
r. 1
,1 Cobalt 0.9 4
_ t 1 I Lead 0.11_P`t ..yy
,� �.1 Molybdenum O11J �t� ,�..LL b � E,• r
. 1 1 \ `'s ',. ;.. or � t •hc". F o-, 1i � +r�•'t" +ts, �,� ° 3',r�
_ G
.11
:a` t of « 4'
To
Sample Nam
BG-IS
Constituent (pg/L)
Antimony
3.8
Arsenic
0.71
Barium
35
Chromium
10 3
500 0 500 1,000
TK U
Analyte
Abbreviation
Antimony
Sb
Arsenic
As
Barium
Ba
Beryllium
Be
Cadmium
Cd
Chromium
Cr
Cobalt
Co
Lead
Pb
Mercury
Hg
Molybdenum
Mo
Selenium
Se
Thallium
TI
Radium-226
Ra-226
Radium-228
Ra-228
ASSESSMENT MONITORING CONSTITUENTS DETECTED IN SHALLOW WELLS (S)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
K
K KY K 1 10-146

Y'9p. Sample Name GWA-7D
k/NR� Constituent (p9/L) S Constitme MW-10D
uent (9/L)
Antimony 1.6 J c
Arsenic 1.5 J Barium 33
/� Barium 207 Cadmium 0.0353 Sample Name GWA-4D
FR/y,Gti Chromium 2.5
�7 Chromium 9.1 J J Constituent (jig/
L)
Cobah 0.25] Sample Name MW-SID Antimon
Roy` Cobah 0.75 Lead 0.051 ] constituent Y 0 32 ]
`I Lead 0.17 ] Antimony 0.21 ]
qk�J
Molybdenum 11.8 Selenium 0.6 Barium 26 Barium 30 J
• fir+ LAKE seiemnm o.94 J
Sample Name GWA-BD �p tJiI�.H ROy� Chromium 0.81 J+ Chromium 9.7
Constituent(p9/L) YADKIN RIUEI-� (fl Sample Name MW-3D Lead 0.15 J+ Cobah 4.4]
Constituent (pg/L) Molybdenum 0.46 ] Lead 0.52 J N
Arsenic 1.61 Barium 79 MoNbdenum 5.5
Barium 353 Chromium 1.9 J+ Selenium 0.32 ]
Chromium 2.51
Cobalt 7.7 ace Lead 0.087 J
Lead 0.151 Molybdenum 0.26 J
Molybdenum 3.61
Selenium 0.243
Sample Name GWA-9D
Constituent(pg/L)
Antimony 0.66 J
Arsenic 0.411
Barium 401
Chromium 7 •
Cobah 1.5 J
Sample mel AS-iD Lead 0.12 J
Constituent (pg/L) Molybdenum 5.4 -a
Antimony 0.191 Selenium 0.52 J -
Arsenic 0.31
Barium 41 J
Chromium 6 Cobalt 0.16 J
Molybdenum 4.2 3
Selenium 0.28 J ,
t
- Sample Name AS -ID w
A A
Constituent (pg/L) _
a e
<` Arsenic 0.19J,
Barium 36 J • .
Chromium 0.35 3 <
_h
Cobalt 0.43 «o
Molybdenum 1.83
.t
r
Sample Name GWA-22D
Constituent (pg/L) - -
Arsenic 0.2 J
Barium 283-
.la,l In '
Chromium 0.1. J -_-"- r -
Cobalt
Molybdenum 0.841 -"
Sample Name MW-9D--1'•�' -`1
V
- Constituent I `a` � - .
. Barium 28 - `'
Lead 0.075J .,. •`-_._ '_ ..,: .•.,.. .,, s , .•' _.<,. ,. .
P�
Sample Name AB-lOD '• -
Constituent (pg/L)
Barium 48
Beryllium 1.3
Cadmium 0.031 w. {�" Sample Name MW-120
Chromium 13.7 - Constituent (pg/L) '
`
Cobatt 0.261 1
- -^ -:. _ �. Antimony 0.161 '-'
Lead 0.11 Barium 14 h-
Molybdenum 10.5 .< _ Chromium 1.4
Selenium 0.66 Lead 0.27 ;
Sample Name AB-2D
ThaNum 0.088 ] �-
Constituent (p9/L) ��• „ „•,. Molybdenum 0.151 x.
Arsenic 0.311 S:- .'
� '� �- � - - -- - - - Sample Name AS-2D
Chromium 0.rium 23] Constituent(pg/L)
Antimony 1.71-
Cobalt 0.15] < Q • Arsenic 2.27
Molybdenum 4.73 = ,:
Barium I
�f a Cadmium 0.0343
• . .
Chromium 3.11
M Cobatt 2.41
Sample Name GWA-10D 9 Molybdenum 0.181
Constituent (pg/L) - Selenium 0.621
Antimony 0.433
Arsenic 0.35 J
Barium 7.7
Beryllium 0.163
Chromium 2.6
Cobalt 0.331
Sample Name AS-3D
- v..._. ., .., Lead 0.11 Constituent (p9/y
Molybdenum 27.5 Arsenic 0.76 J
`•. Selenium 0.313 Barium 18 ]
*;- Chromium 10.9 -
0.173
- -- .t Le
0.096 J i' _
Molybdenum 9.7
Selenium 0.68 3 r. i
_ W 1( K K K K K K K
,•+ Sample Name GWA-11D ., .. _ - ,B' "r w '..i - P �K •µ" . �< L I '
Constituent (p9 K K
< r K K
ri� Antimony 0.29] ;leµ-,_ si `h-.
icy IKg K K KK
Arsenic 0.191 - yK ._ ) y I
- Barium 57
yy +, Beryllium 0.121 y�'+ /.• '� , >�"•i4 P Sample Name Mw-13D KN KK
6) I Chromium 11.3 i .r '' a <.. .. Sample F✓mme AB-3D Constituent (p9/L)
2
T. r ; ` Cobalt 0.28 ] �'a t •. Constituent (pg/L) Barium 48
Lead 0.091 ] < 'y. Arsenic 0.28 3 Chromium 5.2
i - ' ?''� n - ( Barium 64 Cobatt 0.24 3
- r Mercury 0.091 J+
�- Chromium 2.61 Lead 0.092 ]
Molybdenum 3.5 { '- Lead 0.061 J Molybdenum 0.49 3
Selenium 0.411 ` a Mercury 0.072 J LEGEND
Thallium 0.0291 : „ -
w � ,� s Molybdenum 2.7
z K
��p. rl r `. Sample Name MW-7D r- K
h � s' Constituent (pg/L)
m� 2 ;+`f �_ Antimony 0.38J `,✓ - r
K
Barium 18 -
•.,�
•►+ -�^ Cobah 1.7 Constituent (pg/L)
4 ` Lead 0.3 Antimony 0.21 ] � K
Sample Name BG-iD +M. � -
+ v - Constituent (pg/L) t� r L Molybdenum 1.4 } - Chromium 156J K
e Antimony 0.23 7 r'., Lead 0.055 J KK K
0"Ot,
Sample Name GWA-1DOil Arsenic 1 J Constituent (pg/L) Nb
"y, Mo denum 0.27 7
rs in
v"f� Chromium 2 J Ba um 0 13 ] .55
KK K
•' r �,, ry Chromium 16.8 K K K
'`i^ .f+ MoNbdenum 12.7 ] Molybdenum 6.5
a Selenium 0.39 ] r K
, Selenium 0.53 ]
- Sample Name
- Constituent (p9/L) '?�'-.. t F, ._ ... KK K
r :h
( f Antimonylil-
' �, f Barium 22 - a'evj c ,+,;: C , "`" - t y --- K K K
Chromium 1.7 J • ',�•dPJ' '•. �,,awr�-.i* ^'',. �di - a ctb ,.,g, _
T<� Cobah
< Leadp�'w
S' r ty ..p'u'+Nt1 �• i'p '. +�`F ra4
.. 1µV}
g -. •>a�lt'r Sample Name BG-2D
R
a �h. Antimony 0.37 ] r' `" .« v ,� :.: :y ♦,°
w
` Arsenic 0.62-iY!�°33Yi,�',f` "'4,: •>.'f.` jn 'e.�''i:'P*"� `i�ts. yvt •t, f �`• 'v?�^ .•i'' r-.k1�x�,' 2s 'r !', � c•. r.%
Barium 6 4 "v.' ` Ye a b. P" .:, P .:. . < .s4 s F , ;,a, : - • �. ..l 4
Chromium 2 6 r.. h'➢p _ 'i is
f
,+ Cobah 0.15 J
? '
r Molybdenum 40.6
Selenium 0.27] J - r•� 1 "+"• �y.. �4' �r e _ t`
40
,
500 0 500 1,000
lK U
ASSESSMENT MONITORING CONSTITUENTS DETECTED IN DEEP WELLS (D)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
Analyte
Abbreviation
Antimony
Sb
Arsenic
As
Barium
Ba
Beryllium
Be
Cadmium
Cd
Chromium
Cr
Cobalt
Co
Lead
Pb
Mercury
Hg
Molybdenum
Mo
Selenium
Se
Thallium
TI
Radium-226
Ra-226
Radium-228
Ra-228
K
10-147

Name 6WA-9BR ' +il),,,. J
13
im 2.1
♦
1'
� •♦ �
Y
Y
$ a - - a r -
- ^
xS^' 1-Yr
s
M.
ZZ
-2BR/L)0.6430.642
.i
A
]2
J0.055
3
I
,I
or "Air
.
Constituent (pg/L)
nony
0.241
RK -
nic
0.513iA•
-
mium
2.8 G'i+_
-
It
0.85 J
0.1212 J
bdenum
1.4 J
Aium
0.39 J
ample Name
GWA-6BR SampleName
GWA-6BRU
Sample Name
AB-6BRU
Constituent
(pg/L) Constituent (pg/L)
Constituent (pg/L)
imony
0.55 3 Arsenic
0.71 3
Antimony
1.5 J
-nic
0.653 Barium
60
Arsenic
2.2 J
um
8.73 Beryllium
0.22 ]
Barium
411
>mium
8.5 Cadmium
0.065 ]
Beryllium
0.21 J
at
0.3B 3 Chromium
3.1 J
Cadmium
0.037 J
d
0.083 Cobalt
2.8 3
Chromium
16.6 J
,bdenum
3.33 Lead
Cobalt
nium
21 MolybdenumLO.028
Lead
3.3
Seleniumlybdenum
JILlen
6
Thallum
ium
0.53 ]
Thallium
0.113
/v?
C!,`NJL1U I�JIILN - -
- LrLf`VdA.AY.=.)l1�lU �"JI�L'�IS
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PP
r
,r x
G
d
r � 4
f a f n
.'0 1� r�'
r y t
Fa
vor6
,caw,inSE
4*1
r
. I �'-1 F'" .a �� " !s:. f r '' ,,�9K '. a+ke-r'�'.,'"L♦ +\a}� K! y�til
r 7�
� + C..,1 1 M t � 7 T '�.rj� � '%' Nor ` �; A�le. t '. .4+ , .•,•pit,.
♦ �y ! r 4Yi' rrlt'a h` c t�'u3't"( '� / ,+'r`�#�`airAL
r$'����y� Cr
14,
v ,'4Y�ar F IRF".t _ i S ..J 1[ s� :. �•�C- '7 - + Nf4r m .?
500 0 500 1,000
SJ T
1.9
26
0.52
10.4
0.0 88.
17.5
1.6
0.73
94
0.84
5.6
0.28
0.2
20.7
0.92
0.03
ro
ample Name AB-7BRU
Constituent (pg/L)
rtimony 1.7
senic 1.2
Hum 18
.ryllium 0.1 J
dmum 0.025 J
romium 20
bait 0.59
ad 0.79
Alybdenum 27.5
lenrum 2.1
willum 0.11
mple Name GWA-3BR Sample Name GWA-3BRU
Constituent (pg/L) Constituent (pg/L)
enic
0.463 Antimony
0.16
um
4.9 3 Arsenic
0.9
omium
0. 21] Barium
16
Nbdenum
3.1 Beryllium
0.073
Chromium
2.4
Cobak
0.36
Lead
0.13
Molybdenum
22.9
Constituent (pg/L)
rtimony
0.3
senic
0.23
Hum
L
romium
2.9
bait
0.14
ad
0.049
rtybdenum
13.:
knum
0.39
iallum
0.024
S
r
BR
L).9.4.937.4.5
A. Lead 0.088F.
Molybdenum 41.9
`.;,. Selenium 29.3
Thallium 0,0223-
0.78
Sample Name GWA-2BR Sample Name GWA-2BRU "• �'�,:`!
Constituent (pg/L) Constituent (p9/L)
.. Antimony 19.3 Antimony Ll •f +.+�
-`•- Arsenic 0.34 3 Arsenic 0.53
Barum 790 Barium 44 '
•R Chromium 54.8 Chromium 4.4
Lead 0.33 Cobalt 0.41 J �•
- 71
Molybdenum 45.7 Lead 0.3
�+ 0kMo bdenum 2.1
R Selenium 4.9 ly ,�y' ;
'7 ThaKum 018 �� •, q
`;�.n n�.g�'e;dl,�_y„: ';r ', y 6t.#�.iy. ,d �y`�W t ♦ - 1 .-vv
- _ - _ ,
ys T n`
Y CC `Y r y
r y, ly
IV
� K
Sample Name BG-3BRU
Constituent (pg/L)
Antimony -J
Y 4
Arsenic 0.64 J
Barium ill
l Chromium 1.83
Cobalt 0.31 3
Lead 0.23 ]
Molybdenum 5.2
Selenium 0.323
ASSESSMENT MONITORING CONSTITUENTS DETECTED IN BEDROCK WELLS (BRU AND BR)
DUKE ENERGY CAROLINAS, LLC
BUCK STEAM STATION ASH BASIN
J JW J
I
x
rr
Analyte
Abbreviation
Antimony
Sb
Arsenic
As
Barium
Ba
Beryllium
Be
Cadmium
Cd
Chromium
Cr
Cobalt
Co
Lead
Pb
Me rcu ry
Hg
Molybdenum
Mo
Selenium
Se
Thallium
TI
Radium-226
Ra-226
Radium-228
Ra-228
JJ J J J J J J
JJ J
J J J J J
yd J J J
JJy J J J
JN JJ
LEGEND:
J J
J J J
J J J
J J J
J
J J J
J J J
10-148
Ij