NC0005088_4_FINAL_CSA Supplement 2_Appx A_20160808

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/19/16 COMPLETED 2/26/16 GROUND ELEVATION 793.41 HOLE SIZE(S) 5, 9 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543931.26 EASTING 1178015.85
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
> W
F W
<n w
?�Z J
❑
w=
w 0
0❑¢
J�
O j
0>
Y
DESCRIPTION
REMARKS
MONITORING
dU
m0>
0�0
❑
g�
OZ
0
w
U
O
U) Z
ry
rY
0
Ash 0-76', See boring log for A13-313RU for
description of ash and overburden
Drilled 8"x9" sonic to 120'. 6" PVC surface
casing set to 119.0' on 2/23/16
5
Pumped 20 gallons water from well prior to
grouting - pH of purge water 7.5
10
15
20
25

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
3: JJ�Y�
❑
U'
ww
0
0❑¢
O j
p>
Y
DESCRIPTION
REMARKS
MONITORING
❑
aU
m0>
ORO
2�
UZ
L)
w
U
O
rY
cU) Z
ry
25
Ash 0-76', See boring log for A13-313RU for
description of ash and overburden
(continued)
30
35
40
45
50

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
�W
F W
<nw
3�Z J
❑
w=
w 0
0❑¢
J�
O j
p>
Y
DESCRIPTION
REMARKS
MONITORING
❑
aU
m0>
ORO
g�
UZ
L)
w
U
O
rY
cU) Z
ry
50
Ash 0-76', See boring log for A13-313RU for
description of ash and overburden
(continued)
55
60
65
70
75

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
3: JJ�Y�
❑
U'
ww
0
0❑¢
O j
p>
Y
DESCRIPTION
REMARKS
MONITORING
❑
aU
m0>
ORO
g�
UZ
L)
w
U
O
rY
cU) Z
ry
75
Ash 0-76', See boring log for A13-313RU for
description of ash and overburden
(continued)
80
85
90
95
100

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 5 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3: Z J
J
Y
❑
U'
wW
0
0❑¢
5W
p>
Y
DESCRIPTION
REMARKS
MONITORING
❑
dU
m0>
ORO
0
g�
¢
UZ
L)
w
O
rY
Z
ry
100
Ash 0-76', See boring log for A13-313RU for
description of ash and overburden
(continued)
105
Top of Rock at 117'
110
115
119-187.0': cored via 5" sonic
Very massive, tight biotite gneiss from 119 to
120
187'
Competent bedrock encountered at 120'
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
yellowish red (5YR 5/8) and dark grayish
Fracture density is not reported due to to
green (10Y -5-G/4/2), alternating gneissic
excessive mechanical fracturing by
texture (70%) and schistose texture (30%),
Roto -Sonic drilling method.
medium foliated, fresh, competent. Augens
and garnet porphyroblasts are common
locally.
RC -1
125
111

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 6 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3:F
YY
❑
O
w
-1 0
Z J
-J D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
0
g�
¢
UZ
L)
w
O
rY
Z
ry
125
One partially open Tracture wan pyrite
mineralization dipping 50 along foliation
plane at 125.5' bgs.
Same except weathered zone at 135.6-136.4'
with yellowish red (5YR 5/8), gray (5YR 5/1)
and dark gray (5YR 4/1).
128.5-132' and 134' contains cluster of
small partially open fractures with pyrite
mineralization dipping 0-50 along foliation
130
planes; 128.7-129.5' observed one large
2 -inch wide migmatite injection closed
fracture along nearly vertical fracture
RC -2
135
135.6-136.4': subhorizontal and one 300
dipping partially open fracture with
FeOstaining and trace of pyrite
mineralization
Same except two open fractures, one
dipping 150 at 137.5' and one vertical
fracture at 138.8', two clusters of partially
open fracture with traces of pyrite
140
mineralization at 139.3-140.6' and
142.5-143.5' bgs.
RC -3
145
Fracture density is not reported due to to
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
excessive mechanical fracturing by
yellowish red (5YR 5/8), alternating gneissic
Roto -Sonic drilling method. Augens and
texture (70%) and schistose texture (30%),
garnet porphyroblasts are common locally.
medium foliated, fresh, competent.
same except alternating gneissic texture (50%)
and schistose texture (50%)
150

BORING NUMBER AB-3BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 7 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3: �
��
❑
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
g�
UZ
L)
w
O
cU) Z
ry
150
BIOTITE GNEISS very strong, white (WHITE
Partially open fractures with calcite
page N/8), black (GLEY 1 2.5/N) and locally
mineralization dipping at 5 & 300 at
yellowish red (5YR 5/8), alternating gneissic
148.5-149.2', 85-900 at 151-152.5', open
texture (70%) and schistose texture (30%),
fractures observed at 154' (100), 154.5'
medium foliated, fresh, competent.
(300),156.7- (5°), and 157'(650).
(continued)
155
RC -4
same except alternating gneissic texture (70%)
160
and schistose texture (30%)
Clusters of partially open fractures with
quartz mineralization at 159.5-160.5' dipping
at 5 & 80-900 at 163-163.5' dipping at 0-50,
clusters of partially open fractures with
pyrite mineralization at 166.3-169.2' dipping
at 50, 300 and 550.
165
RC -5
170
_ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ -&-
BIOTITE GNEISS very strong, white (WHITE
Fracture density is not reported due to to
page N/8), black (GLEY 1 2.5/N) and locally
excessive mechanical fracturing by
dark greenish gray (10Y-5-GY 4/8),
Roto -Sonic drilling method.
alternating gneissic texture (70%) and
schistose texture (30%), medium foliated,
Open fractures observed at 170-171.5'
`
fresh, competent, augens and garnet
(5-100 and 900), 176.5-177' (100), 179.5-181
porphyroblasts are common locally.
and highly fractured open fractures at
179.5-181.5' (0-50), partially open fractures
with trace of pyrite mineralization at
186-186.7'(5 and 850)
175

BORING NUMBER AB-3BR
440 S. Church Street,
Suite 900
Charlotte, NC 28202-2075
PAGE 8 OF 8
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3:F
YY
❑
O
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
UZ
L)
w
0
O
¢
(/) Z
ry
175
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
dark greenish gray (10Y-5-GY 4/8),
alternating gneissic texture (70%) and
schistose texture (30%), medium foliated,
fresh, competent, augens and garnet
porphyroblasts are common locally.
(continued)
180
RC -7
185
Bottom of borehole at 187.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Groundwater Assessment FN
A, Sample Photographs
Photo 1 — AB-3BR: Box 1 of 6 Depth: 120.0'-130.0' Date: 02/25/16
Photo 2 — AB-3BR: Box 2 of 6 Depth: 130.0'-139.2' Date: 02/25/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Groundwater Assessment ��
Appendix A, Sample Photographs
Photo 3 — AB-3BR: Box 3 of 6 Depth: 139.3'-148.5' Date: 02/25/16
Photo 4 — AB-3BR: Box 4 of 6 Depth: 148.5'-158.7' Date: 02/25/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Groundwater Assessment FN
A, Sample Photographs
Ago*
Photo 5 — AB-3BR: Box 5 of 6 Depth: 158.7'-170.5' Date: 02/25/16
Photo 6 — AB-3BR: Box 6 of 6 Depth: 170.5'-187.0' Date: 02/25/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER AB-5BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/1/16 COMPLETED 3/1/16 GROUND ELEVATION 769.10 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 542961.78 EASTING 1179103.52
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
1-w
(n w
?�Z J
YY
❑
O
a
W
p Q
J�
0-
O w
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
W v
-10
aU
0❑
m0>
ORO
Y
❑
2�
Uz
L)
(-)
U
O
U) Z
ry
0
Refer to AB5-BRV for Lithology
5
10
15
20
25

BORING NUMBER AB-5BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
3: J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
2�
UZ
L)
w
U
O
cU) Z
w
ry
25
Refer to AB5-BRV for Lithology (continued)
30
35
40
45
50

BORING NUMBER AB-5BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
3�ZJJ�YY
❑
O
a v
W
0
DQ
0W
�
U W
0>
DESCRIPTION
REMARKS
MONITORING
WELL
W
❑
-j
0_0
_j
m0>
ORO
Y
U
g�
UZ
L)
w
O
cU) Z
ry
50
Refer to AB5-BRV for Lithology (continued)
55
Competent bedrock encountered at 67'
60
65
BIOTITE GNEISS strong to very strong, white
(WHITE page N/8), black (GLEY 1 2.5/N) and
locally yellowish red (5YR 5/8) and dark
grayish green (10Y-5-GY/4/2), alternating
gneissic texture (60%) and schistose texture
(40%), thinly foliated, fresh to slightly
70
decomposed, competent to locally
moderately disintegrated, augens and garnet
Fracture density is not reported due to to
porphyroblasts are common locally.
excessive mechanical fracturing by
Roto -Sonic drilling method.
Partially open Fe -stained with
RC -1
76
pyrite -serpentine mineralization and
slickenside fracture plane dipping 650 at
69-71' bgs, partially open Fe -stained
horizontal fracture at 74' bgs, other few
horizontal minor foliation plane fractures are
present.
75

BORING NUMBER AB-5BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W z
c
o
0
=
�W
F W
<nw
3: �
��
❑
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
g�
Uz
L)
w
O
cU) Z
ry
75
BIOTITE GNEISS strong to very strong, white
(WHITE page N/8), black (GLEY 1 2.5/N) and
locally yellowish red (5YR 5/8) and dark
grayish green (10Y-5-GY/4/2), alternating
gneissic texture (60%) and schistose texture
(40%), thinly foliated, fresh to slightly
decomposed, competent to locally
moderately disintegrated, augens and garnet
porphyroblasts are common locally.
(continued)
80
same except alternating gneissic texture (85%)
Few horizontal minor foliation plane
and schistose texture (15%), medium
fractures are present
foliated, fresh competent. Augens and garnet
porphyroblast are common locally.
RC -2
83
85
same except alternating gneissic texture (60%)
and schistose texture (40%), no fractures
observed
90
--------------------
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
dark grayish green (10Y -5-G/4/2), alternating
Open vertical fractures at 90.5-91',
gneissic texture (70%) and schistose texture
91.5-91.7', and 93.5-93.7' and one dipping
RC -3
95
(30%), thinly to medium foliated, fresh to
150 at 90.5-91'
slightly decomposed, competent to slightly
disintegrated, augens and garnet
porphyroblasts are common locally
95
100

440 S. Church Street, Suite 900
,M)Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
I:j l$31xi491D1Lvd-1:Ic7
BORING NUMBER AB-5BR
PAGE 5 OF 5
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
it
same except alternating gneissic texture (60%)
and schistose texture (40%), Augens and
garnet porphyroblasts are common locally
One partially open fracture with pyrite
mineralization at 107.2'
1101I same except alternating gneissic texture (65%) One partially open fracture with Mn -staining
1 and schistose texture (35%) 1 at 109-109.5' (900) and 111-111.7'
RC - 51 I 98
Cluster of partially open fractures with
same except alternating gneissic texture (50%) Mn -staining and pyrite mineralization at
115 _ and schistose texture (50%) _ _ _ _ _ _ _ 114.2-114.6' bgs (0-51' dip).
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
dark grayish green (10Y-5-GY/4/2),
alternating gneissic texture (50%) and
schistose texture (50%), thinly foliated, fresh
to slightly decomposed, competent to slightly
disintegrated
Bottom of borehole at 117.0 feet.
z
a ❑o
a
=
>-IY
F Lu
to w
❑
-1 0
Z J
-j D Q
-
o j
U LL1
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
W
❑
dU
m0>
ORO
0
g�
Uz
L)
w
O
cU) Z
W
ry
100
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
dark grayish green (10Y -5-G/4/2), alternating
gneissic texture (70%) and schistose texture
RC -4
95
(30%), thinly to medium foliated, fresh to
slightly decomposed, competent to slightly
disintegrated, augens and garnet
porphyroblasts are common locally
(continued)
it
same except alternating gneissic texture (60%)
and schistose texture (40%), Augens and
garnet porphyroblasts are common locally
One partially open fracture with pyrite
mineralization at 107.2'
1101I same except alternating gneissic texture (65%) One partially open fracture with Mn -staining
1 and schistose texture (35%) 1 at 109-109.5' (900) and 111-111.7'
RC - 51 I 98
Cluster of partially open fractures with
same except alternating gneissic texture (50%) Mn -staining and pyrite mineralization at
115 _ and schistose texture (50%) _ _ _ _ _ _ _ 114.2-114.6' bgs (0-51' dip).
BIOTITE GNEISS very strong, white (WHITE
page N/8), black (GLEY 1 2.5/N) and locally
dark grayish green (10Y-5-GY/4/2),
alternating gneissic texture (50%) and
schistose texture (50%), thinly foliated, fresh
to slightly decomposed, competent to slightly
disintegrated
Bottom of borehole at 117.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 ��
Appendix A, Sample Photographs
Photo 1 — AB-5BR: Box 1 of 5 Depth: 67.0'-90.0' Date: 03/01/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
-Boy, 3 of S
3 -Flip n
a 0.5-- 99 o Ft
'wc Nx
ROD MC iE,
f2� L
Photo 3 — AB-5BR: Box 3 of 5 Depth: 90.5'-99.0' Date: 03/01/16
qj%ft-qO61
.t
„ rf '
RUN 4
_ *� STEAM SfAt+01`/
Photo 4 — AB-5BR: Box 4 of 5 Depth: 99.0' -111.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/01/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
I/-117,0
6u..p JdrT t
O.R
Photo 5 — AB-5BR: Box 5 of 5 Depth: 111.0'-117.0' Date: 03/01/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-24BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/4/16 COMPLETED 3/10/16 GROUND ELEVATION 795.95 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543396.12 EASTING 1179590.64
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
Z
a ❑
�
o
a
=
> W
F W
<n w
3:F-D��
Y�
❑
0
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
0
g�
UZ
L)
w
O
U) Z
ry
0
(SM) SILTY SAND, mottled red (1 OR 4/8) and
dark reddish gray (1 OR 4/1), dry, non -plastic,
non -cohesive, some silt, trace fine gravel,
abundant mica grains, plagioclase grains less
common (RESIDUUM)
(GP) POORLY GRADED GRAVEL WITH
SAND, reddish yellow (7.5YR 6/6), dry,
non -plastic, non -cohesive, trace silt with
alternating thin beds (<1.0') of (GP)
poorly -graded gravel, reddish yellow (7.5YR
5
SD -1
120
7/6), dry, non -plastic, non -cohesive, few fine
to coarse sand, interbeds at 2.2-2.7', 9.5-10',
10.5-11' and weathered schist with GP poorly
graded gravel with sand, red (2.5YR 5/8),
9-9.5', abundant muscovite and biotite grains,
plagioclase and quartz clasts and grains
common (RESIDUUM)
10
15
SD -2
120
(CL) GRAVELLY LEAN CLAY WITH SAND,
mottled red (2.5YR 4/8), brownish yellow
(10YR 6/1) and dark gray (10YR 4/1), moist,
low plasticity, cohesive, some fine to coarse
sand and silt, little fine gravel
(GP) POORLY GRADED GRAVEL WITH
SAND, dark yellowish -brown (10YR 4/4),
dry, non -cohesive, some fine to coarse sand,
abundant schist clasts, abundant
muscovite/biotite, plagioclase and quartz
20
grains
25

BORING NUMBER GWA-24BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
WZ
=
�W
F W
<nw❑
?�F-D-,�
YIY
C'J
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
m0>
0
0
U
2�
<Z
OZ
V
w
w
O
Uj
Lu
0
25
(GP) POORLY GRADED GRAVEL WITH
SAND, dark yellowish -brown (10YR 4/4),
dry, non -cohesive, some fine to coarse sand,
abundant schist clasts, abundant
muscovite/biotite, plagioclase and quartz
grains (continued)
30
BIOTITE GNEISS, very strong, black (GLEY
1 2.5/N) and white (WHITE Page N/8);
alternating gneissic texture (50%) and
schistose texture (50%), augens present
locally, garnet porphyroblasts are common
locally (PARTIALLY WEATHERED
35
SD -4
120
BEDROCK)
Competent bedrock at 40' bgs
40
Fracture density is not reported due to to
BIOTITE GNEISS very strong, black (GLEY 1
2.5/N) and white (WHITE page N/8),
excessive mechanical fracturing by
alternating gneissic texture (60%) and
Roto -Sonic drilling method.
schistose texture (40%), thinly to medium
Horizontal to subhorizontal partially open to
foliated, fresh, competent, augens and garnet
open fractures at 41.2', 42-42.4' (50),
porphyroblasts are common locally.
42.8-43.3' (5°) 44-44.7' (1-5°) 45.5' (5°)
46.7' (5°), 47.1', 47.8' (50), and 49.2' (20),
minor pyrite mineralization along the
fracture planes
45
RC -1
88
1501
One open fracture dipping 700 at 49.3-50'

BORING NUMBER GWA-24BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
3�F ���
YY
❑
C'J
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
g�
UZ
L)
w
O
cU) Z
ry
50
BIOTITE GNEISS very strong, black (GLEY 1
2.5/N) and white (WHITE page N/8),
alternating gneissic texture (60%) and
schistose texture (40%), thinly to medium
foliated, fresh, competent, augens and garnet
Horizontal to sub -horizontal partially open to
porphyroblasts are common locally.
open fractures at 51.5', 53.2'), 53.7' (50),
(continued)
54.5'(50), 55.5-56', 56.4-56.6', 57.5-57.8',
Same lightly disintegrated to to
58.7-59.6', minor pyrite mineralization along
competent, slightly decomposed at
competent,
the fracture planes, one open fracture
dipping 85 at 53.4'.
55
RC -2
100
60
Same except slightly to moderately
decomposed, very intensely fractured,
hematite -stained fracture surfaces locally.
(SAPROLITE)
65
RC -3
86
70
BIOTITE GNEISS very strong, black (GLEY 1
Horizontal to subhorizontal open fractures
2.5/N) and white (WHITE page N/8),
(0-50) at 70.2-70.6', 71.5-71.8', 72.3-72.5',
alternating gneissic texture (70%) and
and 73.8-74', open fractures dipping 20-250
schistose texture (30%), thinly to medium
at 71.8-72.2, 73-73.3' and 74-74.3'.
foliated, fresh, competent to slightly
disintegrated, augens and garnet
porphyroblasts are common locally
75

BORING NUMBER GWA-24BR
440 S. Church Street,
Suite 900
Charlotte, NC 28202-2075
PAGE 4 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
WZ
=
�W
F W
<nw
?�F-D-,�
YIY
❑
C'J
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
0�0
U
2--%
UZ
V
w
w
O
c¢n Z
Uj
Lu
0
75
BIOTITE GNEISS very strong, black (GLEY 1
2.5/N) and white (WHITE page N/8),
alternating gneissic texture (70%) and
schistose texture (30%), thinly to medium
foliated, fresh, competent to slightly
disintegrated, augens and garnet
porphyroblasts are common locally
(continued)
79': same except alternating gneissic texture
80
(50%) and schistose texture (50%), augens
and garnet porphyroblasts are common
locally.
Open vertical fractures are present at
80.2-80.8, 81.3', 82.2', 83', 83.8', 84.2',
85.5', 86.3', and 87.3'. Open horizontal
fractures along foliation planes are present
at 82.8', 83.5', 86.5', and 87.5'
85
RC -5
81
90
Bottom of borehole at 90.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
TOP OF
RUN
. 4��«srnE ss
irg. ,n CTWA-21BK
MR IMIUVA«Fr JIW 0 —10
Dart F 3/H/16
1.00r�rr PAN SISHUK
r�nnsxrs MY j
BOTTOM
OF RUN
Photo 1 — GWA-24BR: Sample SC -1
TOP OF
RUN I
BOTTOM J/ _
OF RUN
Photo 2 — GWA-24BR: Sample SC -1
Depth: 0.0'- 10.0' Date: 03/04/16
T S'' -A
Depth: 0.0'- 5.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/04/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 LIVJ
Appendix A, Sample Photographs
TOP OF
RUN
ENE r•.
' CLIFFJID[ S1
YFu III iGy✓A-248Y2
wrnl mu��Fr wosy s-10
DAN BISNNK
RUM j
BOTTOM
OF RUN
Photo 3 — GWA-24BR: Sample SC -1 Depth: 5.0'- 10.0' Date: 03/04/16
TOP OF
RUN'.
ITE
I, u�yLSID GWAesszi0 20
UEPIN INfF�:4AL (FT
DaM 91sNUK
tawwaxYS kens UV IDIS Me
y/
BOTTOM
OF RUN `
Photo 4 — GWA-24BR: Sample SC -2 Depth: 10.0'- 15.0' Date: 03/04/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
1
I - 1 4, - i
BOTTOM
OF RUN
Photo 5 — GWA-24BR: Sample SC -2 Depth: 15.0'- 20.0' Date: 03/04/16
TOP OF
RUN
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
y uranxr .Pu'XE EwEQGr
► ..,^.
y,��
u�. rn GW4-2wBR
PWW arra YAL (Fr 0es) M- `f0
RAm F 3/H//b
GMDGST DAN BISNUK
A
raMMFxrs RUN 3
'
BOTTOM
OF RUN
F
Photo 6 —
GWA-24BR: Sample SC -3
Depth: 30.0'- 40.0'
Date: 03/04/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
1
BOTTOM V/
OF RUN
I \1
Photo 7 - GWA-24BR: Sample SC -3 Depth: 30.0'- 33.0' Date: 03/04/16
TOP OF
RUN
a
_A
rr rENT DUKC �MERG.Y ,. � ."^1n/
PI— r"VAL 0Fr scs) 3t) -4P
.ernocrsr VA SlSNUK
o cars Rum 3
[r�.seuP73-3F�ks
BOTTOM -
OF RUN _
Photo 8 - GWA-24BR: Sample SC -3 Depth: 33.0'- 36.0' Date: 03/04/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
-
r
i
j
BOTTOM V/
OF RUN
I \1
Photo 7 - GWA-24BR: Sample SC -3 Depth: 30.0'- 33.0' Date: 03/04/16
TOP OF
RUN
a
_A
rr rENT DUKC �MERG.Y ,. � ."^1n/
PI— r"VAL 0Fr scs) 3t) -4P
.ernocrsr VA SlSNUK
o cars Rum 3
[r�.seuP73-3F�ks
BOTTOM -
OF RUN _
Photo 8 - GWA-24BR: Sample SC -3 Depth: 33.0'- 36.0' Date: 03/04/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
r lGY
r! W its rpE ,SS 7t'
vcu rD �.�►-�WBR
w •+ t J/N//6
�..sr pAM'fJMUI[ �.
I*3 AUN 3
txn_fur' v ^ ti �
BOTTOM
OF RUN
Photo 9 — GWA-24BR: Sample SC -3 Depth: 36.0'- 38.0'
I
TOP OF
RUN
BOTTOM
OF RUN
.CLIENT PL4KE EMiQGY
SITE CwrF:51DE -5s
HA=LL ,p GWA-24BR
VEM WMTEKVAL (r -r HGs) ,9ri - ` C,
MATE F 3/y//6
rlFD�T PAN B/3NUK
raMM, prS AUOV 3
Ct_p5EUP.39-'VD Arer<
Date: 03/04/16
Photo 10 — GWA-24BR: Sample SC -3 Depth: 38.0'- 40.0' Date: 03/04/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

I
Photo 12 — GWA-24BR: Box 2 of 5 Depth: 51.0'- 61.0' Date: 03/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
\-1-1RiC#
C
Photo 11 — GWA-24BR: Box 1 of 5 Depth: 40.0'- 51.0' Date: 03/10/16
ILF

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
(;W,4
77,
PAN
LDS/` 3
Photo
Photo 13 — GWA-24BR: Box 3 of 5 Depth: 61.0'- 72.0' Date: 03/10/16
f
7MM Rl.�llt�t`
Photo 14 — GWA-24BR: Box 4 of 5 Depth: 72.0'- 85.0' Date: 03/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
DSI N BISyU�'
'-t-.� /U j,-
Photo
t
o C'
Photo 15 — GWA-24BR: Box 5 of 5 Depth: 85.0'- 90.0' Date: 03/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA 31 BR -A
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 1 OF 6
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/17/16 COMPLETED 3/23/16 GROUND ELEVATION 753.66 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544600.62 EASTING 1174368.22
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME -
NOTES DATE/TIME ---
Z
CY
�R'
V
Lu W
O
O Z J-
p Q
W
o>
0 W
O>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w
p
_j
mo
_j
m0>
O
WO
Y
QO
OZ
v
W
W
O
() Z
0
Grass then (ML) SILT WITH SAND, strong
brown (0-0.6; 7.5YR 5/6) then red (0.7-2';
1 OR 4/8), non -plastic, dry, cohesive, little very
fine to coarse sand, few clay, trace fine
gravel, abundant mica, quartz and
plagioclase feldspar grains and gneiss clasts
(RESIDUUM)
(GP) POORLY GRADED GRAVEL WITH
SAND, predominantly strong brown (7.5YR
4/6 & 5/6), non -plastic, dry, non -cohesive,
5
RC -1
100
some very fine to coarse sand, trace silt,
abundant mica, quartz and plagioclase
feldspar grains and gneiss clasts
(RESIDUUM)
BOULDER; BIOTITE GNEISS strong, black
(GLEY 1 2.5/N) and white (WHITE page N/9
& N/8.5), and yellowish red (5YR 5/6);
10
gneissic texture (60%) and schistose texture
(40%), thinly foliated, slightly to moderately
decomposed, slightly disintegrated
(GP) POORLY GRADED GRAVEL WITH
SAND, dark brown (10-11.6; 7.5YR 3/4)
and pink gray to light brown (11.5-13'; 7.5YR
6/2 and 7.5YR 6/3, respectively), non -plastic,
RC -2
50
moist, non -cohesive, some very fine to
coarse sand, little silt, abundant biotite,
quartz and plagioclase feldspar grains and
gneiss clasts (SAPROLITE)
BIOTITE GNEISS, very strong, black (GLEY
15
1 2.5/N) and white (WHITE page N/8),
gneissic texture (70%) and schistose texture
Competent bedrock encountered at 15' bgs
(30%), thinly foliated, slightly decomposed.
Augens and smoky quartz and light blue
moonstone (plagioclase) is common from
BIOTITE GNEISS very strong, white (WHITE
page N/9 & N/8.5), light bluish gray (GLEY 2
15-70' and 90-127'
Partially open vertical fractures with
67
7/2), grayish brown (2.5Y 5/2), black (GLEY 2
Fe -staining and pyrite mineralization at
RC -1
7/1), and locally reddish yellow red (5YR
16.2 17'
5/8), alternating gneissic texture (60%) and
schistose texture (40%), thinly foliated,
slightly decomposed, slightly disintegrated.
20
Partially open fractures with pyrite
mineralization at 22' (50 dip) and at
23.2-23.6' (90° dip)
25

BORING NUMBER GWA-31 BR -A
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
WZ
=
�W
F W
<nw❑
?�F-D-,�
YIY
C'J
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
Q-0
m0>
0
0
U
2�
<Z
OZ
V
w
w
O
�
Lu
0
25
RU -2
100
BIOTITE GNEISS very strong, white (WHITE
page N/9 & N/8.5), light bluish gray (GLEY 2
7/2), grayish brown (2.5Y 5/2), black (GLEY 2
7/1), and locally reddish yellow red (5YR
5/8), alternating gneissic texture (60%) and
schistose texture (40%), thinly foliated,
slightly decomposed, slightly disintegrated.
(continued)
25': same, except addition of localized
pyroxene, predominantly olive green (5GY
30
4/4) with light olive green (5GY 5/4) locally
30': same with localized pyroxene, except
Partially open fractures with pyrite
alternating gneissic texture (50%) and
mineralization at 30-30.5' (0-100 dip),
schistose texture (50%)
32.3-32.5 (900 dip), 34.5-35.3'(901 dip),
35.8-36.5' (900 dip)
35
RC -3
93
40
40': same except light bluish gray (5PB 7/1),
olive green (5GY 5/4), and black (GLEY 1
2.5/N), alternating gneissic texture (50%)
Partially open vertical fractures with pyrite
and schistose texture (50%)
mineralization at 40.5-90.6' (900), 41.2-41.3'
(400), 42.7-43'(50 & 900), 43.5-44.4' (850),
45.3-45.7' (900)
45
RC -4
67
Fracture density is not reported due to to
excessive mechanical fracturing by
Roto -Sonic drilling method.
50

BORING NUMBER GWA-31 BR -A
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3�F ���
YY
❑
C'J
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
g�
UZ
L)
w
O
cU) Z
ry
50
BIOTITE GNEISS very strong, white (WHITE
page N/9 & N/8.5), light bluish gray (GLEY 2
7/2), grayish brown (2.5Y 5/2), black (GLEY 2
Partially open fracture with pyrite
7/1), and locally reddish yellow red (5YR
mineralization at 50.4-50.5' (200), 51.3-51.8'
5/8), alternating gneissic texture (60%) and
(50), 52.5-52.6' (900), 53.4-53.5' (900),
schistose texture (40%), thinly foliated,
54.5-54.6' (900), 54.9-55.1' (900), 56.5-56.7'
slightly decomposed, slightly disintegrated.
(900), 57.4-57.7'(50 & 850), 59.2-59.5' (50 &
(continued)
8.50)
50': same
55
RC -5
89
60
60': same
Partially open fractures Fe -staining and
pyrite mineralization at 60-60.3' (50 & 850
dip)
63': same except alternating gneissic texture
Partially open fractures with Fe -staining at
RC -6
94
(60%) and schistose texture (40%)
63-63.5' (50 & 850)
65
65': same except alternating gneissic texture
(60%) and schistose texture (40%), no
fractures observed.
70
Partially open fractures with pyrite
mineralization at 70.3' (50), and 76.3'(50)
RC -7
100
74': same, except andradite garnet present at
75
74.74.5'

BORING NUMBER GWA 31 BR-A
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 4 OF 6
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
Z
=
HW
�H-n-
YW
pU'
�
V
WW
J O
O Z J—
p Q
W
o>
W
0>
DESCRIPTION
REMARKS
MONITORING
NITORING
WELL
W
p
aU
-j
000>
O
wO
Y
QO
UZ
v
w
w
O
cn Z
of
75
BIOTITE GNEISS very strong, white (WHITE
page N/9 & N/8.5), light bluish gray (GLEY 2
7/2), grayish brown (2.5Y 5/2), black (GLEY 2
7/1), and locally reddish yellow red (5YR
5/8), alternating gneissic texture (60%) and
schistose texture (40%), thinly foliated,
slightly decomposed, slightly disintegrated.
(continued)
77': same except garnet is absent, no fractures
observed
80
81': same except garnet is absent, alternating
gneissic texture (75%) and schistose texture
RC-8
100
(25%)
Partially open fractures with pyrite
mineralization at 83' (5° dip), 84' (5° dip) and
85.8-86.1' (10° & 15°)
85
87': same except alternating gneissic texture
(60%) and schistose texture (40%), no
fractures observed
90
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
BIOTITE GNEISS with localized pyroxene
No fractures observed
very strong, white (WHITE page N/9 &
N/8.5), light bluish gray (GLEY 2 7/1), grayish
brown (2.5Y 5/2), olive green (5GY 5/4), and
RC-9
78
black (GLEY 1 2.5/N), alternating gneissic
texture (60%) and schistose texture (40%),
thinly foliated, fresh, competent.
95
98': same except large augens (up to 2.4-in.
diameter) present at 100-101.5'
100

BORING NUMBER GWA-31 BR -A
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 5 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3: �
��
❑
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
g�
UZ
L)
w
O
Z
ry
100
BIOTITE GNEISS with localized pyroxene,
Partially open fractures with pyrite
very strong, white (WHITE page N/9 &
mineralization at 98'(5"), and 105-105.5'
N/8.5), light bluish gray (GLEY 2 7/1), grayish
(85°)
brown (2.5Y 5/2), olive green (5GY 5/4), and
RC-
96
black (GLEY 1 2.5/N), alternating gneissic
10
texture (60%) and schistose texture (40%),
thinly foliated, fresh, competent. (continued)
105
107': same
110
Partially open fractures with pyrite
mineralization at 110.5-110.8' (50 & 850) and
113.3-113.6' (50 & 850)
RC-
77
11
115
115': same except light blue moonstone
(plagioclase) are common, no fractures
observed.
117': same except alternating gneissic texture
(90%) and schistose texture (10%), abundant
plagioclase feldspar (albite and blue
moonstone) and smoky quartz, large
phenocrysts up to 0.5 -in. diameter.
120
120': same, except alternating gneissic texture
Clusters of partially open fractures with
(60%) and schistose texture (40%), increase
pyrite mineralization at 119.5-121.6' (0-50
in mafic minerals and decrease in felsic
dip) and 124.5-126.2'(0-50)
minerals
RC-
100
12
125

BORING NUMBER GWA 31 BR -A
S. Church Street, Suite 900
Charlotte, 28202-2075
PAGE 6 OF 6
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
z
=
HW
�:H-n
Yw
pU'
�
Lu w
O Z J-
p Q
W
o>
(� W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w V
p
-j 0
aU
-j
000>
O
wO
Y
QO
Oz
W
W
O
125
Bottom of borehole at 127.0 feet.

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-31 BR -A: Sample SC -1 Depth: 0.0'- 10.0' Date: 03/16/16
11 ENS 'l��' SS
SITE C^�FnS ID�18R-A
Photo 2 — GWA-31 BR -A: Sample SC -1 Depth: 0.0'- 2.0' Date: 03/16/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
n "�"
BOTTOM
OF RUN
I VEN'
S ITE
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 3 — GWA-31 BR -A: Sample SC -1 Depth: 2.0' - 8.0' Date: 03/16/16
Photo 4 — GWA-31 BR -A: Sample SC -1
YY\ 1
y �« ���
Depth: 8.0'- 10.0' Date: 03/16/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
. Iiv
-0 f
� ,#�Y Y ,�} lr Jl ,q T'•fls 1 � P•� ♦.r •. S '.[' ♦.ia
Photo 5 — GWA-31 BR -A: Sample SC -2 Depth: 10.0'- 15.0'
I GSq DAGy cI�FFsiD�
qP 2693,E
% 2.
7A 3/!7//6
PHAV B/S,yUK
Photo 6 — GWA-31 BR -A: Box 1 of 11
Date: 03/16/16
M . T
v
Depth: 15.0'— 26.5' Date: 03/17/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
`W4/ t�ilcfylj�
Photo 7 — GWA-31 BR -A: Box 2 of 11 Depth: 26.5'-37.0' Date: 03/17/16
"`
t t
2.
41 syr
�c
a m
�m
G
Photo 8 — GWA-31 BR -A: Box 3 of 11 Depth: 37.0'-52.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
A
--
�t
Date: 03/17/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs FN
--3
�f V
I
Photo 9 — GWA-31 BR -A: Box 4 of 11 Depth: 52.0'-63.0' Date: 03/17/16
Photo 10 — GWA-31 BR -A: Box 5 of 11 Depth: 63.0'-72.2' Date: 03/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 11 — GWA-31 BR -A: Box 6 of 11 Depth: 72.2'-83.0'
Date: 03/18/16
Photo 12 — GWA-31 BR -A: Box 7 of 11 Depth: 83.0'-93.0' Date: 03/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
g�411r ;
Photo 13 — GWA-31 BR -A: Box 8 of 11 Depth: 93.0'-105.0'
Y1�� '�^►13�ji,�'^�YCCir,
-0r531'9 ��ss
Ooo
J
Date: 03/18/16
-.ce - �I A
Photo 14 — GWA-31 BR -A: Box 9 of 11 Depth: 105.0'-115.4' Date: 03/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
RvNx
R
�i
97 Ne
/-? mv) „-
Photo 15 — GWA-31 BR -A: Box 10 of 11 Depth: 115.4'-124.6'
\)aD
Date: 03/19/16
Photo 16 — GWA-31 BR -A: Box 11 of 11 Depth: 124.6'-127.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/19/16

BORING NUMBER GWA-34S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 2
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/20/16 COMPLETED 3/22/16 GROUND ELEVATION 712.55 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545058.04 EASTING 1171545.44
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY �F DATE/TIME 3/29/2016 11:36:00 AM 2.14 ft
NOTES 1 DATE/TIME ---
Z
a ❑
�
o
a
=
>
F W
w
<n
3: Z J
J
Y
❑
U'
W
w Q
0 Q
W
0LLI >
Y
DESCRIPTION
REMARKS
MONITORING
❑
0_0
M0>
ORO
U
2�
UZ
L)
w
O
U) Z
ry
0
(ML) SILT WITH SAND, red (11 OR 5/6), low
plasticity, moist, cohesive, lightly weathered
regolith (SOIL)
--------------------
(SW-SM) WELL GRADED SAND WITH SILT,
5
SD - 1
108
red (1 OR 5/6), grading downward to light
reddish gray (10R 7/1), non -plastic,
non -cohesive (PWR)
Top of Rock at 9'
10
NOTE: drilling crew dropped core box,
BIOTITE GNEISS, very strong, white (N9 &
N/8.5), Light Bluish Gray (5PB 7/1), Grayish
spilling contents, rock cores were not in
Brown (2.5Y 5/2), Black (GLEY 1 2.5/N),
correct order. Therefore, description is
Dark Grayish Green (5GY 4/2), and locally
generalized
reddish yellow (5YR 5/8), alternating gneissic
texture (60%) and schistose texture (40%),
thinly -foliated, slightly decomposed, slightly
disintegrated, fracture density is not reported
Augens are common, pyrope garnet
due to excessive mechanical fracturing by
porphyroblasts are present, few partially
Roto -Sonic drilling method.
open fractures with Fe -staining throughout
interval 10-20' bgs
15
RC -1
100
Same - except partially open fractures with
Mn -staining at 21.5-22.2' bgs (450 dip) and
cluster of Fe -Mn stained horizontal fractures
along foliation planes at 24-27' bgs.
20
[25]

440 S. Church Street, Suite 900
Charlotte, 28202-2075
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Ener
PROJECT NUMBER
BORING NUMBER GWA-34S
PAGE 2OF2
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
Bottom of borehole at 30.0 feet.
z
a ❑o
a
=
>- W
F W
(n w
❑
w
-1 0
Z J
-j D Q
-
o j
U LL1
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
dU
m0>
ORO
❑
2�
Uz
V
w
w
U
O
<0
25
Bottom of borehole at 30.0 feet.

BORING NUMBER GWA-35D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/30/16 COMPLETED 3/31/16 GROUND ELEVATION 695.25 HOLE SIZE(S) 8, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545450.05 EASTING 1172891.97
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY I DATE/TIME 4/8/2016 10:45:00 AM 24.86 ft
NOTES 1 DATEITIME ---
W Z
c
o
0
=
�W
F W
<nw
F- Z)
YO
❑
C'1
w
W 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
0�0
UZ
UJ
w
U
O
<0
U) Z
ry
0
(SW -SM) WELL GRADED SAND WITH SILT,
pale red (10R 6/3), grading downward to red
(10R 4/8), non -plastic, dry, cohesive,
Boring for 6" surface casing: 8" x 10" sonic
structureless fabric, no rock (FILL)
0-18' possible fill from adjacent drainage
swale
SD -1
96
5
--------------------
(SW-SM) WELL GRADED SAND WITH SILT
AND GRAVEL, weak red (2.5YR 5/2),
grading downward to light brownish red
(2.5YR 6/3), and back to dark reddish gray
10
(2.5YR 4/1), low plasticity, moist, cohesive,
structureless, micaceous, 10% gravel, minor
organic matter (wood) at base (FILL)
SD -2
120
15
--------------------
(SW-SM) WELL GRADED SAND WITH SILT,
gray (5R 5/1), non -plastic, moist,
non -cohesive, structureless, degraded wood
fragments, throughout sample (FILL)
t-SD
120
�

BORING NUMBER GWA-35D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W z
c
o
0
=
�W
F W
U) U.1
>>F ���
YY
❑
C'J
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
U
2�
Uz
L)
w
O
cU) Z
ry
25
(SW -SM) WELL GRADED SAND WITH SILT,
gray (5R 5/1), non -plastic, moist,
non -cohesive, structureless, degraded wood
fragments, throughout sample (FILL)
(continued)
---------------------
(SP-SM) POORLY GRADED SAND WITH
Bottom of fill @ 28'
SILT, pink (7.5YR 7/4), non -plastic, wet,
cohesive to non -cohesive at bottom of run,
30
fine to medium grained, no relic rock fabric,
very uniform (SOIL)
36': same as above, 1' felsic rock lens at base
SD -4
96
35
24
SD -5
---------------------
(SP) POORLY GRADED SAND WITH
GRAVEL, pink (7.5YR 7/4) with 2.5' very
pale brown (10YR 8/2), felsic lens,
40
non -plastic, wet, non -cohesive, highly to
moderately weathered gneiss (SAPROLITE)
SD -6
120
45
BIOTITE GNEISS, strong, very dark gray
Top of Rock at 47'
(2.5Y 3/1) and white (N9), phaneritic, fine to
medium grained, subhorizontal, thin foliation,
shistose (WEATHERED/FRACTURED
ROCK)
6" PVC surface casing set to 49.0' on
50
1
1
1 3/31116

BORING NUMBER GWA-35D
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 3 OF 3
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
Z
=
�
HW
WW
�:H-n_
O Z J-
p Q
UJW
o>
YW
0>
CY
DESCRIPTION
REMARKS
MONITORING
WELL
W V
p
J O
aU
_J
000>
O
wO
Y
QO
Oz
v
W
W
O
cn Z
50
BIOTITE GNEISS, strong, very dark gray
(2.5Y 3/1) and white (N9), phaneritic, fine to
medium grained, subhorizontal, thin foliation,
51-53.0': Intensely to very intensely
shistose (WEATHERED/FRACTURED
fractured, horizontal to subhorizontal, Fe
ROCK) (continued)
staining
51.9-52.0': silt (ml), very dark gray (5y 3/1),
52.2-53.6': Heavy Fe staining
moist, non -plastic, non -cohesive, micaceous
(SAPROLITE)
53.6-54.3': Calc -silicate zone, white (7.5YR
9.5/1) and gray (2.5Y 5/1); 53.6-54.2':
(ML) SANDY SILT, strong brown (7.5YR 4/6),
moist, non-platic, non -cohesive, micaceous
55
fracture 700, heavy Fe staining
54.3-60.2': Soft drilling
I—(SAPROLITE)------------ J
(ML) SANDY SILT, white (N9), dry,
56.0-59.4': Core loss
non -plastic, non -cohesive, with fine to coarse
quartz grains and fine gravel -size rock
fragments (SAPROLITE/WEATHERED
59.4-60.2': Calc -silicate zone; 59.4-59.7':
ROCK)
Very intensely fractured, Fe staining
59.7-61.6': Moderately to intensely
fractured, bedding joints, subhorizontal, Fe
staining, pyrite
60.3': Fracture, 30°, Fe staining
60
—
62.2-62.9': Calc -silicate zone; 62.2':
BIOTITE GNEISS, very strong, very dark gray
Greenish band
(2.5Y 3/1) and white (N9), phaneritic, fine to
62.4': Fracture, 30', Fe staining
medium grained, horizontal to 30°, thin
foliation, shistose
(WEATHERED/FRACTURED ROCK)
63': Fractures (2), intersecting, 20°, Fe
staining
63.2-63.7': Calc -silicate zone; 63.7':
Fracture, horizontal, Fe staining
64-64.3': Very intensely fractured
65
64.3-66': Moderately fractured horizontal,
bedding joints, with pyrite
BIOTITE GNEISS same as above except less
Monitoring well installed 4/6/16; well screen
fractured (SOUND ROCK)
interval 62.0-67.0'
66.4-67.9': Calc -silicate zone, with
sillimanite, xenoliths common; 66.4':
Fracture, horizontal, pyrite
Bottom of borehole at 69.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 1 — GWA-35D: Sample SC -1 Depth: 0.0'-8.0' Date: 03/30/16
L
$!+ E. �L�Ff51DE55
FWA16: GWA- 35 66,
J>Arf: MAR- 3o2w6
DAY+Id: o- ff F
`ahMQ�b#; Sc- z
i7�'mcM
Photo 2 — GWA-35D: Sample SC -1 Depth: 0.0'-8.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/30/16

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
a� h' l ti �nkwG GWA 35
S'
nq7e : NUR 3o Zdb
{ik ISL PM G" L f7
17 �Fs'ITeM
irk .
IT
T, ° —
"C��tia• >
Photo 3 — GWA-35D: Sample SC -1 Depth: 0.0'-8.0'
y 4 t \S
�,� ter. "�< x � ", }�' � -a � Y ;. � f ; fE� _ ✓`\� "..
Photo 4 — GWA-35D: Sample SC -1 Depth: 0.0'-8.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/30/16
Date: 03/30/16

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 5 — GWA-35D: Sample SC -2 Depth: 8.0' -18.0' Date: 03/30/16
Photo 6 — GWA-35D: Sample SC -2 Depth: 8.0' -18.0' Date: 03/30/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
SITE.
P�o2.iu
*'6
bEPT/
`aAN�p+
Photo 7 — GWA-35D: Sample SC -2 Depth: 8.0' -18.0' Date: 03/30/16
Photo 8 — GWA-35D: Sample SC -2 Depth: 8.0' -18.0' Date: 03/30/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
�.40 141 142
6 •7 $ 9
Photo 9 — GWA-35D: Sample SC -2 Depth: 8.0' -18.0' Date: 03/30/16
lee
Photo 10 — GWA-35D: Sample SC -3 Depth: 18.0' -28.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
o 21 22 23 97 75
.. nn d 44 45 46 47
Photo 11 — GWA-35D: Sample SC -3 Depth: 18.0'- 28.0' Date: 03/31/16
Photo 12 — GWA-35D: Sample SC -3 Depth: 18.0'- 28.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 13 — GWA-35D: Sample SC -3
Depth: 18.0'-28.0'
Date: 03/31/16
Photo 14 — GWA-35D: Sample SC -4 Depth: 28.0'-36.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 15 — GWA-35D: Sample SC -4 Depth: 28.0' - 36.0' Date: 03/31/16
Photo 16 — GWA-35D: Sample SC -4 Depth: 28.0'- 36.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 17 — GWA-35D: Sample SC -5 Depth: 36.0' - 38.0' Date: 03/31/16
Photo 18 — GWA-35D: Sample SC -6 Depth: 38.0'- 48.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 19 — GWA-35D: Sample SC -6 Depth: 38.0'- 48.0' Date: 03/31/16
Photo 20 — GWA-35D: Sample SC -6 Depth: 38.0'- 48.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

s ,74'
Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 21 — GWA-35D: Sample SC -6 Depth: 38.0'- 48.0' Date: 03/31/16
Photo 22 — GWA-35D: Sample SC -6 Depth: 38.0'- 48.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
�1
�
Is W;7
{
Photo 22 — GWA-35D: Sample SC -6 Depth: 38.0'- 48.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 23 — GWA-35D: Sample SC -7 Depth: 48.0'- 51.0' Date: 03/31/16
�h;i;rivp!Y IOYR
8i
Y
Photo 24 — GWA-35D: Sample SC -7 Depth: 48.0'- 51.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 ��
Appendix A, Sample Photographs
Photo 25 — GWA-35D: Box 1 of 2 Depth: 51.0'- 64.0' Date: 04/05/16
Photo 26 — GWA-35D: Box 2 of 2 Depth: 64.0'- 69.0' Date: 04/05/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-35S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 2
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 4/6/16 COMPLETED 4/7/16 GROUND ELEVATION 695.687 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545443.02 EASTING 1172882.81
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Campbell CHECKED BY �F DATE/TIME 4/8/2016 10:45:00 AM 23.20 ft
NOTES 1 DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
?� Z
Z)
❑
U'
W
w Q
0 Q
w
0>
Y
DESCRIPTION
REMARKS
MON LRING
Q-0
coo>
O
O
❑
2�
OZ
0
w
U
O
U) Z
ry
rY
0
See boring log for GW -35D for lithologic
description
5
10
15
20
25

BORING NUMBER GWA-35S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
PAGE 2 OF 2
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
>�F ���
YY
❑
C'J
w
-1 0
Z J
OJ ¢
-
o j
U LL1
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
dU
m0>
ORO
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
30
Boring terminated at 38', screened interval
35
set at 20'-35', monitoring well installed
4/7/16
Bottom of borehole at 38.0 feet.

BORING NUMBER GWA-36D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/16/16 COMPLETED 2/16/16 GROUND ELEVATION 707.52 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545365.46 EASTING 1174228.18
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3:F-D��
Y�
❑
0
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
g�
Uz
L)
w
0
O
U) Z
ry
0
(SW -SM) WELL GRADED SAND WITH SILT
AND GRAVEL, pinkish gray (5YR 6/2) and
red (2.5YR 5/6), mostly plastic, moist,
Well installed 2/16/16
cohesive, some crushed rock (FILL)
SD -1
72
5
SD -2
120
10
15
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(SM) SILTY SAND, reddish yellow (7.5YR
Base of fill �15' -Dark organic staining from
6/6) grading downward to pink (7.5YR 7/3)
degraded roots
with occasional white (7.5YR 8/1), felsic
layers, low plasticity to non -plastic, wet,
cohesive, highly weathered biotite gneiss
(SAPROLITE)
20
SD -3
120
25

BORING NUMBER GWA-36D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw❑
3:F-D-,�
YIY
C'J
w
W 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
0
0
U
2�
<Z
OZ
V
w
w
O
Lu
Uj
0
25
(SM) SILTY SAND, reddish yellow (7.5YR
6/6) grading downward to pink (7.5YR 7/3)
with occasional white (7.5YR 8/1), felsic
layers, low plasticity to non -plastic, wet,
cohesive, highly weathered biotite gneiss
(SAPROLITE) (continued)
26-36': Moderately well preserved relic foliation
(subhorizontal) highly weathered gneiss
(SAPROLITE)
30
SD -4
120
35
120
40
SD -5
45
---------------------
(SM) SILTY SAND, light brown (7.5YR 6/4),
non -plastic, wet, cohesive, micaceous, highly
weathered, subhorizontal relic gneissic
compositional banding and foliation
throughout entire core run (SAPROLITE)
50

BORING NUMBER GWA-36D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W z
c
c
o
=
�W
F W
<nw
3: �
��
❑
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
Uz
L)
w
U
O
¢Z
i
c)
�
�
50
(SM) SILTY SAND, light brown (7.5YR 6/4),
—Material Is highly weathered an
non -plastic, wet, cohesive, micaceous, highly
uniform (consistent lithology)
SD -6
120
weathered, subhorizontal relic gneissic
compositional banding and foliation
throughout entire core run (SAPROLITE)
(continued)
55
SD -7
120
60
65
continued (66-76') - no rock fragments
(SAPROLITE)
70
SD -8
120
75

BORING NUMBER GWA-36D
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 4 OF 4
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
Z
=
HW
�:H-n_
YW
CY
�
V
WW
J O
O Z J-
p Q
W
o>
0 W
0>
DESCRIPTION
REMARKS
MONITORING
WELL
W
p
aU
_j
000>
O
WO
Y
QO
UZ
W
w
O
75
(SM) SILTY SAND, light brown (7.5YR 6/4),
non-plastic, wet, cohesive, micaceous, highly
weathered, subhorizontal relic gneissic
compositional banding and foliation
throughout entire core run (SAPROLITE)
Top of Rock 77'
(continued)
Thin 0.1 to 0.4' seams of weathered gneiss
SD - 9
48
interlayered with saprolite to 80'.
Fracture density not reported due to
Y Is re p
0.2' seam of tough, unweathered gneiss @ 77'
excessive mechanical fracturing by
Roto-Sonic drilling method
6" PVC surface casing set to 80' on 2/13/16
80
Augens are common, Andradite and pyrope
BIOTITE GNEISS, strong to very strong,
white (N9 & N/8.5), Light Bluish Gray (5PB
garnet porphyroblasts are present, few
7/1), Grayish Brown (2.5Y 5/2), Black (GLEY
locally, albite and moonstone plagioclase
1 2.5/N), Dark Grayish Green (5GY 4/2), and
feldspar, smoky quartz, biotite, and
locally reddish yellow (5YR 5/8), alternating
pyroxene are present, abundant Fe-staining
gneissic texture (60%) and schistose texture
is present in the highly decomposed and
78
(40%), thinly foliated, slightly decomposed,
intensely
RC-1
slightly disintegrated.
85
disintegrated interval 80-81' bgs; partially
open fractures with Fe and Mn staining with
localized pyrite mineralization at 81-82' bgs
(cluster dipping at 5, 25, 50, & 60°) and
82-82.5'(90') and 83-83.5' (90°)
Partially open fractures with Fe-staining and
pyrite mineralization at 86.3 and 87.3' (15°
dip), 89.5-90.2' bgs (90° dip), 93-93.5' (5° &
85° dip) and 94.5-95' and 95-95.5' (25° dip)
90
RC-2
93
95
Bottom of borehole at 96.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
M
Aw
' U -
Ni
•YYY
Y
t ,... �. I YYY•
- YYY
Photo 2 — GWA-36D: Sample SC -2 Depth: 6.0'- 16.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 02/13/16
r
Date: 02/13/16

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 3 — GWA-36D: Sample SC -2 Depth: 6.0'- 16.0'
{ice
Date: 02/13/16
Photo 4 — GWA-36D: Sample SC -2 Depth: 6.0'- 16.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 02/13/16

Duke Energy Carolinas, LLC I Cliffside Steam
zt ti Sa p e PSupplement hotographs 2 L�J
Append
Photo 5 — GWA-36D: Sample SC -3 Depth: 16.0'- 26.0' Date: 02/13/16
Photo 6 — GWA-36D: Sample SC -3 Depth: 16.0'- 26.0' Date: 02/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
53 5a 33 I 1 51 SBS 11 [41 41 b] 63 65 bb 61 66 49 ]D ]f kl3 ]3 ]4 )5 ]6 » ]9 ]9
F-se�. 5G''iv -'l4FI
] ea rtm es a ea oo
Photo 7 — GWA-36D: Sample SC -3 Depth: 16.0'- 26.0' Date: 02/13/16
d
Photo 8 — GWA-36D: Sample SC -3 Depth: 16.0'- 26.0' Date: 02/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
�wv
Photo 9 — GWA-36D: Sample SC -4 Depth: 26.0'- 36.0'
Date: 02/13/16
Yyyy -
�_ 1 ,l
1 l%f •
iL=a..
-U 21 22 23 ELn 25 26 2T 28 29 ,
]
Photo 10 — GWA-36D: Sample SC -4 Depth: 26.0'- 36.0' Date: 02/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
N - 41 47
29 30 31 33, 34 35 EFh 37 30 34 40
P.4 Mc,
f�VQ//16
DfP7f/
,�;pMP« A
7L,P!
Photo 11 — GWA-36D: Sample SC -4 Depth: 26.0'- 36.0' Date: 02/13/16
P' 'WN "' A ". IMWNIWL& CC: -A"' OUI
Photo 12 — GWA-36D: Sample SC -4 Depth: 26.0'- 36.0' Date: 02/13/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
zt ti Sa p e PSupplement hotographs 2 L�J
Append
Photo 13 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0' Date: 02/17/16
1 Z 3 4 5 6 7 9 9 ltl 51 IA 17 14a 15
.2 .3 .4. . _ �...—,. -
7
Photo 14 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0' Date: 02/17/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
14 20
21
22^
23
E!7
25
26
27 28
2'
7
Photo 14 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0' Date: 02/17/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
25 26 27 1& 29 30 31 33 34 15 Fh 37 39 34 40 411 42 43 44 45 45 47 40 50 51 53 53 54 55
,, an -MENIMMINIMIKIv—
Photo 15 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0' Date: 02/17/16
.w F
59 T.M 51'.
� ML
Photo 16 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0' Date: 02/17/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
y
����i.. y.. � �` Yom.-�'^ _w'>? ;? _� _ � •,:Lzy,w 1�T
ry J �� p� iJ3 134 !JS i}6 91
Photo 17 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0'
"�lwll— i—&72"< : 4 � *.�' -�'*0. tl ppm
�i�r...t
Date: 02/17/16
Photo 18 — GWA-36D: Sample SC -5 Depth: 36.0'- 46.0' Date: 02/17/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 19 — GWA-36D: Sample SC -6 Depth: 46.0'- 56.0' Date: 02/18/16
;zi
7n 77 77 ?1 07 ?5
Photo 20 — GWA-36D: Sample SC -6 Depth: 46.0'- 56.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt tin p e Photographs 2 FN
Photo 21 — GWA-36D: Sample SC -6 Depth: 46.0'- 56.0' Date: 02/18/16
Photo 22 — GWA-36D: Sample SC -6 Depth: 46.0'- 56.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 23 — GWA-36D: Sample SC -7 Depth: 56.0'- 66.0'
Date: 02/18/16
Photo 24 — GWA-36D: Sample SC -7 Depth: 56.0'- 66.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
nal
ag 19
Photo 24 — GWA-36D: Sample SC -7 Depth: 56.0'- 66.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
€7
Photo 25 — GWA-36D: Sample SC -7 Depth: 56.0'- 66.0' Date: 02/18/16
Photo 26 — GWA-36D: Sample SC -8 Depth: 66.0'-76.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs FN
-
1 35 Ftj 37 38. 30 40 47 42 43 44 45 46
Photo 27 — GWA-36D: Sample SC -8 Depth: 66.0'- 76.0' Date: 02/18/16
�11. TV. xr,
Aw,
110 10 71 74 75 76 77 78 7* 81 811
90 90
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
DAq; f+6 f3 is 206
I)f
AjAPLLiJ: SC --'g
x.4
Photo 28 — GWA-36D:
Sample SC -8
Depth: 66.0'- 76.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
'"3`
Photo 29 — GWA-36D: Sample SC -8 Depth: 66.0'- 76.0' Date: 02/18/16
W3
Photo 30 — GWA-36D: Sample SC -9 Depth: 76.0'- 80.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt tin p e Photographs 2 FN
Photo 31 — GWA-36D: Sample SC -9 Depth: 76.0'- 80.0'
O ', —AURNMER,
t
Photo 32 — GWA-36D: Sample SC -9 Depth: 76.0'- 80.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
F`J
Date: 02/18/16
OA 1k; Fill �9 z�
WIN,: GWS. -3,
bf PTN . 76 - 8 o
�511MPLFO: Sc.-�
Date: 02/18/16

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt ti Sa p e Photographs 2 FN
Photo 33 — GWA-36D: Sample SC -9 Depth: 76.0'-80.0'
►Pijlsssl" s�j°j>i�s �I iNOWt
Date: 02/18/16
Photo 34 — GWA-36D: Sample SC -9 Depth: 76.0'-80.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam
mAppendzt tin p e Photographs 2 FN
Photo 35 — GWA-36D: Sample SC -9 Depth: 76.0'- 80.0' Date: 02/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-36S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 1
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/17/16 COMPLETED 2/17/16 GROUND ELEVATION 707.80 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545361.74 EASTING 1174231.06
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
z
a ❑S
�❑
o
a
=
>IY
F W
<nw
3�ZJ-,�YIY
U'
W
w Q
0 Q
F) w
0>
Y
DESCRIPTION
REMARKS
MONITORING
dU
m0>
0�0
❑
g0
Uz
Uj
w
U
O
Zry
rY
0
See boring log for GW -36D for lithologic
description
5
10
15
20
Bottom of borehole at 22.0 feet.

BORING NUMBER GWA-37D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/2/16 COMPLETED 3/7/16 GROUND ELEVATION 707.68 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545741.36 EASTING 1174065.36
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME --
NOTES DATEITIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3:F-D��
Y�
❑
0
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
Uz
L)
w
0
O
U) Z
ry
0
(SM) SILTY SAND, Red (2.5YR 4/16) grading
downward to pale red (2.5YR 6/2),
non -plastic, moist, non -cohesive, fine to
Well installed on 3/7/16 - overseen by M.
coarse grained (FILL)
Sheehan; purged 13 gals. water from well
prior to grouting; pH=4.5-5.0
SD -1
84
5
108
10
SD -2
Roots @ 14'
15
----------------------
(SW-SM) WELL GRADED SAND WITH SILT
No relic rock fabric
AND GRAVEL, predominantly light reddish
brown (5YR 6/3), non -plastic, moist,
non -cohesive (FILL)
20
SD -3
120
L25

BORING NUMBER GWA-37D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
I-- W
<nw❑
3: 1- D
-, �
Y IY
C'J
w
W 0
Z J
REMARKS
0¢
-
o j
U W
0>
Y
DESCRIPTION
MONITORING
WELL
❑
0_0
m0>
0
0
U
2�
OZ
V
w
w
O
c¢n Z
0
Uj
Lu
25
(SW -SM) WELL GRADED SAND WITH SILT
AND GRAVEL, predominantly light reddish
brown (5YR 6/3), non -plastic, moist,
non -cohesive (FILL) (continued)
30
SD -4
120
35
----------------------
(SW-SM) WELL GRADED SAND WITH SILT
quartzite (rounded) cobble @ 36'
AND GRAVEL, light reddish brown (2.5YR
6/4), non -plastic, moist, non -cohesive (FILL)
40
SD -5
108
____________________
(SM) SILTY SAND, dark reddish gray (2.5YR
Base of Fill at 41'
4/1) to reddish gray (2.5YR 5/1), non -plastic,
wet, non -cohesive (SOIL)
alluvial sand, wood fragments and roots
present
45
--------------------
(CL) LEAN CLAY, brown (7.5Y 5/3), plastic,
moist, cohesive, no structure, alluvial
sediment, rounded quartzite pebbles and
cobbles (ALLUVIUM)
50
SD - 6
108

BORING NUMBER GWA-37D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W z
c
c
o
=
�W
F W
<nw
3�ZJJ�YY
❑
O
a v
W
0
DQ
0W
�
U W
0>
DESCRIPTION
REMARKS
MONITORING
WELL
W
❑
-j
0_0
_j
m0>
ORO
Y
U
g�
¢
Uz
L)
w
O
Z
W
ry
50
(SM) SILTY SAND, light brownish gray (10YR
51.5': Base of alluvium, contact with
6/2), non -plastic, moist, non -cohesive, relic
gneissic saprolite
gneiss rock fabric, highly weathered
(SAPROLITE)
58-61.5': saprolite is light gray (10YR 7/1), less
55
SID -7
12
weathered
SD -8
82
60
--------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, pale brown (10 YR 6/3) and yellowish
red (5YR 5/6), non -plastic, moist, cohesive,
highly weathered, relic gneiss rock fabric
present with thin felsic bands, subhorizontal
foliation (SAPROLITE)
65
SD -9
120
70
75

BORING NUMBER GWA-37D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
U) U.1
?�F ���
YY
❑
C'J
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
U
g�
UZ
L)
w
O
cU) Z
ry
75
(SP-SM) POORLY GRADED SAND WITH
SD-
SILT, pale brown (10 YR 6/3) and yellowish
10
84
red (5YR 5/6), non-plastic, moist, cohesive,
highly weathered, relic gneiss rock fabric
present with thin felsic bands, subhorizontal
foliation (SAPROLITE) (continued)
80
SD -
11
48
85
6" PVC casing set to 86.0' on 3/3/16;
transition zone coring started on 3/7/16
(GP) POORLY SORTED GRAVEL WITH
Abundant relic phenocrysts consist of
SAND, yellowish brown (10YR 5/4, 5/6, and
plagioclase feldspar, quartz, and amphibole,
5/8), non-plastic, wet, non-cohesive, some
abundant biotite grains
fine to coarse sand, trace silt
90
RC-1
48
95
Meta-diorite rock fragments are common,
(ML) SANDY SILT WITH GRAVEL, mottled
light olive brown (2.5Y 5/3, 5/4 and 5/6),
relic phenocrysts of plagioclase feldspar,
yellowish brown (10YR 5/8) and strong brown
quartz and amphibole, abundant biotite
(7.5YR 5/8), non-plastic, wet, cohesive, some
grains
very fine to coarse sand, little fine to medium
100
RC - 2
90
gravel

F)�440 S. Church Street, Suite 900
Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
CLIENT D
PROJECT NUMBER
BORING NUMBER GWA-37D
PAGE 5OF5
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
(GP) POORLY GRADED GRAVEL WITH
Z
wD
SAND, pale yellow (5Y 8/3, 8/4, 7/3, and
z
o
0
(N/9.5), non -plastic, wet, non -cohesive, some
plagioclase feldspar and smoky quartz
very fine to coarse sand, few silt
=
Of
HW
�H_D_jW
Y
CY
�
W W
O Z J—
p Q
W
o>
(� W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
W V
p
_j 0
a()
_j
m0>
O
(if0
Y
QO
Oz
W
W
O
z
100
(GP) POORLY GRADED GRAVEL WITH
HDunaant large meta-monte rocK Tragn
SAND, pale yellow (5Y 8/3, 8/4, 7/3, and
consisting mostly of felsic minerals,
7/4), bluish gray (GLEY 2 5PB 6/1), and white
abundant relic phenocryst of albite
(N/9.5), non -plastic, wet, non -cohesive, some
plagioclase feldspar and smoky quartz
very fine to coarse sand, few silt
Bottom of borehole at 102.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-37D: Sample SC -1 Depth: 0.0' - 7.0' Date: 03/03/16
Photo 2 — GWA-37D: Sample SC -1 Depth: 0.0' - 7.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 3 — GWA-37D: Sample SC -1 Depth: 0.0' - 7.0' Date: 03/03/16
Photo 4 — GWA-37D: Sample SC -2 Depth: 7.0'- 16.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — GWA-37D: Sample SC -2 Depth: 7.0'- 16.0'
Date: 03/03/16
Photo 6 — GWA-37D: Sample SC -2 Depth: 7.0'- 16.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 7 — GWA-37D: Sample SC -3
Depth: 16.0'- 26.0' Date: 03/03/16
Photo 8 — GWA-37D: Sample SC -3 Depth: 16.0'- 26.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
kolwl
42 4J 44 45 46
Photo 9 — GWA-37D: Sample SC -3 Depth: 16.0'- 26.0' Date: 03/03/16
75 ".I 85 Bb 87 86
Photo 10 — GWA-37D: Sample SC -3 Depth: 16.0'- 26.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
to �
V ti• t
F ay r{�w,S
Photo 11 — GWA-37D: Sample SC -3 Depth: 16.0'- 26.0' Date: 03/03/16
Photo 12 — GWA-37D: Sample SC -3 Depth: 16.0'-26.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
FONM
.& .1 �[
Photo 13 — GWA-37D: Sample SC -4 Depth: 26.0'-36.0' Date: 03/03/16
RN
�g.Ma
,,`, �'
V
vi
J4
fi
r wF;,e
2 t
R lt.sr�'.
Photo 14 — GWA-37D: Sample SC -4 Depth: 26.0'- 36.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
� s-
Photo 15 — GWA-37D: Sample SC -4 Depth: 26.0'- 36.0'
Date: 03/03/16
Photo 16 — GWA-37D: Sample SC -4 Depth: 26.0' - 36.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
R
+may; `�L. � � �' t:1►,s� r, � � r ./,� ,<� 2',i
I Ir
Photo 17 — GWA-37D: Sample SC -5 Depth: 36.0'- 45.0' Date: 03/03/16
1b '17 1Z 19 39 31 _ 33 3a q. .^l 31 :15 s e, < .. .
Photo 18 — GWA-37D: Sample SC -5 Depth: 36.0'- 45.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

u0 OY zu 71
.fi 7 -8 .A
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
73 74 75
CUFFSOOL- Soft'
Photo 19 — GWA-37D: Sample SC -5
,. On O9 r-" O e
Depth: 36.0'- 45.0' Date: 03/03/16
Photo 20 — GWA-37D: Sample SC -5 Depth: 36.0'-45.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 21 — GWA-37D: Sample SC -6
r r �.: ��
r � r
,i
Depth: 45.0'- 54.0' Date: 03/03/16
Photo 22 — GWA-37D: Sample SC -6 Depth: 45.0'- 54.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLo|cmfsmoateamatauon-caxaupplemomz FN
Photo 23—GVVA-37D: Sample SC -6 Depth: 45.0'- 54.0' Date: 03/03/18
Photo 24—GVVA-37D: Sample SC -6 Depth: 45.0'- 54.0' Date: 03/03/16
»unnc.00m 44oSChurch Street, Suites 90O&10O0 Charlotte, NC 28202-2075
[phone]

rig a.� ..
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
66 67 68 69 70 71
F .5 .]
73 74 75 76 77 78 79 81 82 81 ELF 85 86
.1 2 3 A G 4 51,1 t
5lrE; CLIF�SI�� S�
13DRING: GWA-3720
lW'E'. MAR 3 2 3, 6
brPrw 4 -s -5y i•r
SAMPLE#.,
• r.. 'Y.{V ta4""rvr'lk.Zh..�, ts.,'
Photo 25 — GWA-37D: Sample SC -6 Depth: 45.0'- 54.0' Date: 03/03/16
' 78 74 82 '23 rh 85 86 87 3 88 _.89 90 9�1 92] 93 a 94 995 97 96 99 100 101 702 101 104 105 rnR
SirE: CLIFFSit* s5
1309WG, SWA-37D
TlArE'. MAA 3 23,6
bsprH µs -5y i^r
SAm;'tr# ' Sc- 6
TO? C------> a J' o o
Photo 26 — GWA-37D: Sample SC -6 Depth: 45.0'-54.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
c- A:
98 99 100,101 1012 103104 105 106 107
7 tong 124 121 /..1
Photo 27 — GWA-37D: Sample SC -6 Depth: 45.0'-54.0' Date: 03/03/16
,113 114 1\5 llb lY] 11S � `� Qj1 .
Photo 28 — GWA-37D: Sample SC -6
Depth: 45.0'- 54.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 ��
Appendix A, Sample Photographs
Photo 29 — GWA-37D: Sample SC -7 Depth: 54.0'-55.0' Date: 03/03/16
Photo 30 — GWA-37D: Sample SC -8 Depth: 55.0' - 62.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
' 2,t..n 32
25 26 27 26 2
Photo 31 — GWA-37D: Sample SC -8 Depth: 55.0'- 62.0' Date: 03/03/16
Photo 32 — GWA-37D: Sample SC -8 Depth: 55.0'- 62.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
_ 52 53 SA 3_ �C ,i> _! f2 ...t 5< bb 5a• nV .rr m ++ +n +
Photo 33 — GWA-37D: Sample SC -8 Depth: 55.0'- 62.0' Date: 03/03/16
Photo 34 — GWA-37D: Sample SC -9 Depth: 62.0'- 72.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 35 — GWA-37D: Sample SC -9 Depth: 62.0'- 72.0' Date: 03/03/16
M� J
3fl 3f - 33 34 35 FE7 ay 38
40 41 42 43 44 45 46 tll 49 i0_ 3S 53 5454 5
Photo 36 — GWA-37D: Sample SC -9 Depth: 62.0'- 72.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
_5 an .1 C3 9i a4 95 97 98 99 100 101 }OZ lOJ 104
—of.rb„jc Q
�6��MG, GWA-34S
�TE. M,An 3 Zd�6
:,E pT�4
Sp►'nPLr� Sc`9
Photo 37 — GWA-37D: Sample SC -9 Depth: 62.0'- 72.0' Date: 03/03/16
Photo 38 — GWA-37D: Sample SC -9 Depth: 62.0'- 72.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs FN
s..
Photo 39 — GWA-37D: Sample SC -10 Depth: 72.0'- 80.0' Date: 03/03/16
Photo 40 — GWA-37D: Sample SC -10 Depth: 72.0'- 80.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 41 — GWA-37D: Sample SC -11 Depth: 80.0'- 87.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-37S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/8/16 COMPLETED 3/8/16 GROUND ELEVATION 707.59 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545745.17 EASTING 1174059.49
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY �F DATE/TIME 3/29/2016 11:17:00 AM 37.99 ft
NOTES 1 DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
?� Z
Z)
❑
U'
W
w Q
0 Q
w
0>
Y
DESCRIPTION
REMARKS
MON LRING
Q-0
m0>
OHO
❑
g�
UZ
L)
w
U
O
U) Z
ry
rY
0
See Boring Log for GWA-37D for lithologic
description
5
10
15
20
25

BORING NUMBER GWA-37S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
�W
F W
<nw
?�Z J
❑
w=
w 0
0❑¢
J�
O j
p>
Y
DESCRIPTION
REMARKS
MONITORING
aU
m0>
ORO
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
See Boring Log for GWA-37D for lithologic
description (continued)
30
35
40
45
50

BORING NUMBER GWA-37S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
PAGE 3 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
?�Z J
Y�
❑
O
ww
0
0❑¢
J�
o j
p>
Y
DESCRIPTION
REMARKS
MONITORING
dU
m0>
ORO
❑
g�
UZ
L)
w
U
O
c¢i� Z
ry
rY
50
See Boring Log for GWA-37D for lithologic
description (continued)
55
Bottom of borehole at 55.0 feet.

BORING NUMBER GWA-38D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/12/16 COMPLETED GROUND ELEVATION 757.28 HOLE SIZE(S) 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545295.90 EASTING 1176204.21
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3:F-D��
Y�
❑
0
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
Uz
L)
w
0
O
U) Z
ry
0
(ML) SILT, reddish brown (5YR 4/6), moist,
slightly micaceous, massive (FILL)
Coring with 10" casing to 47'
trace fine to very fine sand with depth, color
grays to 5YR 5/8
SD -1
84
5
----------------------
(ML) SILT WITH SAND AND GRAVEL,
reddish brown (2.5YR 3/6), moist,
micaceous, little sand, trace gravel (FILL)
10
SD -2
120
Wood chips (creosote) odor at 14' (FILL)
15
120
--------------------
20
SD -3
(ML) SILT WITH SAND, reddish brown
(2.5YR 3/6), moist, micaceous, little sand,
L25
trace gravel, ?calcarenite granules, wood,
fragments (FILL)

BORING NUMBER GWA-38D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
U) U.1
?�F ���
YY
❑
C'J
w
-1 0
Z J
-J D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
2�
UZ
L)
w
O
cU) Z
ry
25
(ML) SILT WITH SAND, reddish brown
(2.5YR 3/6), moist, micaceous, little sand,
trace gravel, ?calcarenite granules, wood,
fragments (FILL) (continued)
30
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(ML) SANDY SILT, mostly silt with some very
Distinct color change 30-30.5'
fine to fine sand, light yellowish brown (10YR
6/4), moist, micaceous, poorly sorted (FILL)
SD-4
120
Rock fragments start at 34'
35
----------------------
(ML) SILT WITH GRAVEL, mostly silt some
gravel, little sand, dark brown (7.5YR 4/4),
moist, relic rock fragments (FILL)
Transitions to rock
40
--------------------
(GW-GM) WELL GRADED GRAVEL WITH
SILT, mostly gravel, some silt, some sand,
light tan (10YR 8/1) to dark brown (10YR
Rock encountered at 41'
2/2), moist to dry, angular, well graded (FILL)
SD-5
120
Difficult drilling
45
46-47': No recovery, hard rock, bit chatter
Backfill material to 47'
BIOTITE GNEISSHard, slightly weathered
RC - 1
0
(GLEY 2.5/10) banded (GLEY 2 8/10), fine to
medium grained, joint: rough, close, foliated,
micaceous, banded white
50-65': Hard, very slightly weathered, white to
50

BORING NUMBER GWA-38D
440 S. Church Street,
Suite 900
Charlotte, NC 28202-2075
PAGE 3 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
3�F ���
YY
❑
C'J
w
-1 0
Z J
-J D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
UZ
L)
w
U
O
rY
cU) Z
ry
50
BIOTITE GNEISSHard, slightly weathered,
recovery. 6ravel zone to approximately
(GLEY 2.5/10) banded (GLEY 2 8/10), fine to
53-55'
medium grained, joint: rough, close, foliated,
RC -2
100
micaceous, banded white
50-65': Hard, very slightly weathered, white to
gray (continued)
Mechanical breaks every 0.2'. Very difficult
55
to determine RQD
60
RC -3
100
65
Bottom of borehole at 65.0 feet.

BORING NUMBER GWA-38S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/16/16 COMPLETED 2/17/16 GROUND ELEVATION 757.04 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545303.18 EASTING 1176204.41
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Haramut CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3: F- Z)
❑
w
w W
Z J
0 ¢
-
O j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
aU
m0>
OHO
❑
2--%
OZ
0
w
U
O
U) Z
ry
rY
0
See Boring Log: GWA-38D
5
10
15
20
25

BORING NUMBER GWA-38S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
�Z J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
30
35
40
45
50

F)�440 S. Church Street, Suite 900 BORING NUMBER GWA-38S
Charlotte, 28202-2075 PAGE 3 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
z
= H W � H n - KWCY
� WW O Z J- W 0 W MONITORING
W V -j 0 -j p Q o> 0> Y DESCRIPTION REMARKS WELL
p aU m0> O 0
QO Uz W w O
cn z
50
boring terminated a , screened interval
set at 35'-50', monitoring well installed
Bottom of borehole at 51.0 feet. 2/17/16

F)�440 S. Church Street, Suite 900
Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
BORING NUMBER GWA-39S
PAGE 1 OF 1
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
DATE STARTED 4/8/16
COMPLETED 4/8/16
GROUND ELEVATION 720.17 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P.
NORTHING 544433.87 EASTING 1176960.10
DRILLING METHOD Sonic
GROUND WATER LEVELS:
LOGGED BY D. Campbell
CHECKED BY
7 DATE/TIME 4/8/2016 2:00:00 PM 0.50 ft
NOTES
1 DATE/TIME ---
z
=
H W
�: 1-- n
YCY
d�LLI
W
Q Z J-
Q
W
o>
(� W
Q>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w V
o
J O
-j�
moUz
vov
Y
¢o
L
Lu
ov
U) z
0�
of
(ML) SANDY SILT, olive brown (2.5Y 4/3),
wet, low plasticity, cohesive, very fine sand
(ALLUVIUM)
Bottom of borehole at 5.0 feet.
boring aavancea Tor purpose or mstaning �
piezometer -
Boring terminated at 5', screened interval
set at 3'-5', piezometer installed 4/8/16

440 S. Church Street, Suite 900
F)"'Z Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
BORING NUMBER GWA-40S
PAGE 1 OF 1
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 4/8/16 COMPLETED 4/8/16 GROUND ELEVATION 720.07 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544290.09 EASTING 1176893.364
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Campbell CHECKED BY 7 DATE/TIME 4/8/2016 2:00:00 PM 4.00 ft
NOTES 1 DATE/TIME ---
Boring terminated at 7.5', screened interval
set at 4'-7', piezometer installed 4/8/16
Bottom of borehole at 7.5 feet.
MR
z
=
HW
�H��KY�
CY
�
W W
O Z J—
Q
W0
O>
W
O>
DESCRIPTION
REMARKS
MONITORING
WELL
W V
Q
J O
mo
_j=)
m0>
O
WO
Y
QO
Oz
v
W
W
O
()Z
of
of
0
(ML) SANDY SILT, olive brown (2.5Y 4/3),
boring advanced or purpose or installing
TT
moist, low plasticity, cohesive, very fine sand
piezometer
N
A
(ALLUVIUM)
Boring terminated at 7.5', screened interval
set at 4'-7', piezometer installed 4/8/16
Bottom of borehole at 7.5 feet.
MR

BORING NUMBER GWA-42S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
PAGE 1 OF 1
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
DATE STARTED 4/1/16 COMPLETED 4/1/16
GROUND ELEVATION 721.94 HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P.
NORTHING 544318.29 EASTING 1176795.55
DRILLING METHOD Sonic
GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY
DATE/TIME --
NOTES
DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3: F- Z)
❑
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
dU
m0>
0�0
❑
2--%
OZ
0
w
U
O
U) Z
ry
rY
0
See Boring Log: GWA-42D
5
Boring terminated at 9', screened interval
set at 4'-9', monitoring well installed 4/1/16
Bottom of borehole at 9.0 feet.

BORING NUMBER GWA-43S
440 S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 1 OF 1
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/30/16 COMPLETED 3/30/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
LLJ �
c
o
e
} W
(n W
Z J
>-
LLI
p
d
w w
J O
O
J p Q
w
U
p>
DESCRIPTION
REMARKS
MONITORING
WELL
Lu
p
dU
CO > 0
O
w�
Y
U
20
0
w
W
0
U)O
0
See GWA-43D for lithologic description
5
10
15
20
Bottom of borehole at 22.0 feet.

BORING NUMBER GWA-43D
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 1 OF 2
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/29/16 COMPLETED 3/29/16 GROUND ELEVATION 722.35 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544428.69 EASTING 1176622.32
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME -
NOTES DATE/TIME ---
Z
CY
�R'
V
Lu W
O
O Z J-
p Q
W
o>
0 W
O>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w
p
_j
mo
_j
m0>
O
WO
Y
QO
OZ
v
W
W
O
() Z
0
Leaf Litter then (SM) SILTY SAND, mottled
strong brown (7.5YR 4/6) and dark brown
Abundant mica grains from 0.5'-29.0'
(7.5YR 3/4), non -plastic, moist,
Well installed on 3/22-3/23/16; purged 5
non -cohesive, some silt (SOIL)
gals. water from well prior to grouting;
(SP) POORLY GRADED SAND, strong brown
pH=6.5
(7.5YR 5/6 & 5/8), non -plastic, dry,
non -cohesive (RESIDUUM)
(ML) SILT WITH SAND, strong brown (7YR
SD -1
84
5/6), non -plastic, moist, cohesive, some very
fine to medium sand (RESIDUUM)
5
(SP -SM) POORLY GRADED SAND WITH
SILT, dark yellowish brown (10YR 4/6),
strong brown (7.5YR 5/6 & 5/8) changing to
grayish brown (10YR 5/2) at 11-12',
non -plastic, moist then wet at 7 to 7.5',
non -cohesive, little silt (RESIDUUM)
10
SD - 2
120
Abundant plagioclase, feldspar and quartz
(ML) GRAVELLY SILT WITH SAND, red
(2.5YR 4/8), strong brown (7.5YR 4/6 & 5/6),
grains from 12.0-29'
and grayish brown (10YR 5/2), non -plastic,
wet, cohesive, little very fine to�F7
and fine to coarse gravel, relic
(SAPROLITE)
15
(GP) POORLY GRADED GRAVEL WITH
SAND, brown (10YR 5/3), grayish brown
(10YR 5/2), and yellowish brown (10YR 5/4 &
5/6), non -plastic, wet, non -cohesive, some
very fine to coarse sand, trace to few silt
(RESIDUUM)
(ML) GRAVELLY SILT WITH SAND, brown
20
(10YR 4/3 & 5/3), yellowish brown (10YR 5/4
& 5/6), dark yellowish brown (10YR 4/4 &
4/6), yellowish red (5YR 5/8), and reddish
yellow (7.5YR 7/6), non -plastic, wet,
cohesive, some very fine to coarse sand,
some fine to coarse gravel, relic foliation
SD - 3
120
(SAPROLITE)
25

BORING NUMBER GWA-43D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 2
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
w
�W
F W
_j 0
<nw
3: �
Z J
_j D Q
��
-
o j
U W
0>
❑
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
2�
UZ
L)
w
O
cU) Z
ry
25
(ML) GRAVELLY SILT WITH SAND, brown
(10YR 4/3 & 5/3), yellowish brown (10YR 5/4
& 5/6), dark yellowish brown (10YR 4/4 &
4/6), yellowish red (5YR 5/8), and reddish
yellow (7.5YR 7/6), non -plastic, wet,
cohesive, some very fine to coarse sand,
some fine to coarse gravel, relic foliation
(SAPROLITE)
(GP) POORLY GRADED GRAVEL WITH
30
SAND, brown (10YR 5/3), yellowish brown
(10YR 5/4 & 5/6), and pale brown (10YR 6/3),
non -plastic, dry, non -cohesive
SD - 4
84
35
Competent bedrock at 34.5' bgs
Fracture density is not reported due to
BIOTITE GNEISS, very strong, white (N9 &
N/8.5), Light Bluish Gray (5PB 7/1), Grayish
RC -1
Brown (2.5Y 5/2), Black (GLEY 1 2.5/N),
excessive mechanical fracturing by
Dark Grayish Green (5GY 4/2), and locally
Roto -Sonic drilling method
reddish yellow (5YR 5/8), alternating gneissic
Augens are common, albite plagioclase
texture (60%) and schistose texture (40%),
feldspar, smoky quartz, and biotite are
thinly -foliated, slightly decomposed, slightly
common, pyroxene and light blue
disintegrated.
moonstone (plagioclase) is present but
uncommon; partially open fracture with
Fe -staining at 34.5-35' bgs (0-51 dip), and
pyrite
mineralization at 36'(5* dip) and 36.8-37'
40
bgs (100 dip)
RC -2
Partially open fractures with Fe -staining at
42' bgs (20 dip) and pyrite mineralization at
42.7-43' (50 & 850 dips), 37.5'(50 dip), and
46.1'(100 dip)
45
Partially open fractures with pyrite
mineralization at 47-47.5' (50 & 850 dips),
48-48.3'(250 dip) and 49-49.2' (50 & 850
RC -3
dips)
50
Bottom of borehole at 50.0 feet.

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-43D: Sample SC -1 Depth: 0.0' - 7.0' Date: 03/22/16
LA
Photo 2 — GWA-43D: Sample SC -2 Depth: 7.0'- 17.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 3 — GWA-43D: Sample SC -3 Depth: 17.0'- 27.0' Date: 03/22/16
Photo 4 — GWA-43D: Sample SC -3 Depth: 20.0'- 24.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — GWA-43D: Sample SC -3 Depth: 24.0'- 27.0'
Photo 6 — GWA-43D: Sample SC -4 Depth: 27.0'- 34.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/22/16
Date: 03/22/16

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Is . -s
-/
�tiwy�.• LMN IaSN✓r
Photo 7 — GWA-43D: Sample SC -4 Depth: 27.0'- 30.0' Date: 03/22/16
W
Photo 8 — GWA-43D: Sample SC -4 Depth: 30.0'- 34.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs
Photo 9 — GWA-43D: Box 1 of 1 Depth: 34.5' - 50.0' Date: 03/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-44BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED COMPLETED 2/11/16 GROUND ELEVATION 765.95 HOLE SIZE(S) 5.5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544232.45 EASTING 1176085.01
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY T. Campbell CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
z
a ❑S
o
a
2
>IY
E W
<nw
3:Z J
❑
a
W
Q
J�
W
O�
U W
O>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
Q-0
-j❑
m0>
OHO
Y
❑
g�
OZ
�
w
U
O
U) Z
ry
rY
0
5
10
15
20
25

BORING NUMBER GWA-44BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
3: J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
30
35
40
45
50

BORING NUMBER GWA-44BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
3: J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
g�
UZ
L)
w
U
O
c¢i� Z
ry
rY
50
55
60
65
70
75

BORING NUMBER GWA-44BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3: ���Y�
❑
O
w
_j 0
Z J
_j D Q
-
O j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
0
g�
UZ
L)
w
O
rY
cw Z
ry
75
80
6" PVC casing installed to 81.0'
BIOTITE GNEISS, moderate to strong, black
Fresh core is intensely fracture
(5Y 2.5/1), fine to coarse grained, schistose,
(mechanical). Foliation and veins generally
thinly foliated, trace pyrite, few quartz veins
subhorizontal, breaks along foliation
(SOUND ROCK)
RC -1
85
85
88.5-88.8': Very intensely fractured, weak
90
Water added during drilling -moist content
not described
RC -2
100
All RQD estimated due to high occurrence
of breaks - core broken into pucks.
95
(SP) SAND WITH GRAVEL, dark gray (5Y
4/1), non -plastic, non -cohesive, fine to
medium with large gravel and biotite gneiss
to 1" thick (RESIDUAL SOIL)
97.0-97.6': Intensely fractured
BIOTITE GNEISS, moderate to strong, black
(5Y 2.5/1), fine to coarse grained, schistose
to gneissic texture, strongly foliated (SOUND
ROCK)
100

BORING NUMBER GWA-44BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 5 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3: ���YO
❑
O
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
0
g�
UZ
L)
w
O
Z
ry
100
BIOTITE GNEISS, moderate to strong, black
(5Y 2.5/1), fine to coarse grained, schistose
to gneissic texture, strongly foliated (SOUND
ROCK) (continued)
102.0-102.6': Intensely fractured
RC -3
90
Core is mechanically intensely fractured into
disks, RQD based on absence of staining
along breaks and tight fit along some
breaks.
105
109.5-109.9': Quartz vein, macrocrystalline
below 110', biotite and quartz veins becoming
110
more prominent, becoming coarser grained
RC -4
100
Bentonite backplug 103.5-131.0'
115
116.8-117.0': Residual soil
120
1202-120.9': Very intensely fractured
121.0-123.3': Moderately fractured
RC -5
81
125

440 S. Church Street, Suite 900
,M)Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
1:j l$31xi491D1Lvd-1:Ic7
BORING NUMBER GWA-44BR
PAGE 6OF6
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
BIOTITE GNEISS, moderate to strong, black
(5Y 2.5/1), fine to coarse grained, schistose 125.5-131': Moderately fractured
to gneissic texture, strongly foliated (SOUND (mechanical)
ROCK) (continued)
Well installed 2/11/16, screen 94.1-99.1'
Bottom of borehole at 131.0 feet.
z
a ❑o
a
=
>- W
F W
(n w
❑
w
-1 0
Z J
-j ❑ ¢
-
o �
U LL1
p >
Y
DESCRIPTION
REMARKS
MONITORING
WELL
R0
❑
o0�°
Q
z
o
__
nz
w
ry
BIOTITE GNEISS, moderate to strong, black
(5Y 2.5/1), fine to coarse grained, schistose 125.5-131': Moderately fractured
to gneissic texture, strongly foliated (SOUND (mechanical)
ROCK) (continued)
Well installed 2/11/16, screen 94.1-99.1'
Bottom of borehole at 131.0 feet.

'a1
t— BLKRC-Y- cu Fr -'PO
;WA-4AOR
B,DY "' OF 5
117/-/%
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
a
0
t
sx»ie
S scc��z .�.w� wra s 3ai53 e+-+7
O
R.'uN 2 {970- 4"F 01
T�EcavrrsY ItbY. R6 D 77/
BW z )
II S r
a
Photo 1 — GWA-44BR: Box 1 of 5 - Depth: 81.0'- 91.7' Date: 02/10/16
4w
Photo 2 — GWA-44BR: Box 2 of 5 Depth: 91.7'- 101.5' Date: 02/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs
Ci. PE
awe
ff E,
dw
rav'u
�c-
4 — izz. o
Photo 3 — GWA-44BR: Box 3 of 5 Depth: 101.5'- 112.4' Date: 02/10/16
Ehf�FCY-CL-rGFsr/� �/
44i5<
•
Photo 4 — GWA-44BR: Box 4 of 5 Depth: 112.4'- 122.0' Date: 02/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs
�u�v- cx.rcFsrr� �/
•
Photo 4 — GWA-44BR: Box 5 of 5 Depth: 122.0'- 131.0' Date: 02/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-44D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/2/16 COMPLETED 2/12/16 GROUND ELEVATION 766.02 HOLE SIZE(S) inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544225.17 EASTING 1176084.81
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Haramut CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
>
F W
<n w❑
?�ZJ-,�Y�
C7
w Q
0 Q
W
0>
Y
DESCRIPTION
REMARKS
MON LRING
W
❑
0_0
m0>
0
0
g�
OZ
Q
w
U
O
U) Z
ry
0
(ML) SANDY SILT WITH GRAVEL, dark
reddish brown (2.5YR 2.5/3), moist, some
very fine to coarse sand, some pebbles and
cobbles, micaceous (FILL)
SD -1
5
Continued: brown (7.5YR 4/3), non -plastic
Continued: red (1 OR 4/6)
10
SD -2
Continued: brown (7.5YR 5/4)
15
Continued: white (8N)
(SW -SM) SAND WITH SILT AND GRAVEL,
dark brown (7.5YR 4/3) mottled with white
(8N), (FILL)
20
Continued: dark brown (7.5YR 3/2), rock
SD - 3
fragments become larger
25

BORING NUMBER GWA-44D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
U) U.1
?�F ���
YY
❑
C'J
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
2�
UZ
L)
w
O
cU) Z
ry
25
(ML) SILT WITH SAND, dark brown (7.5YR
3/2), non -plastic, some fine to coarse sand,
micaceous (FILL)
30
SD -4
(ML) SILT WITH GRAVEL, dark brown (10YR
4/3), some large cobbles, kaolinitic (FILL)
35
(ML) GRAVELLY SILT WITH SAND, dark
40
greenish gray (5GY 4/1), well graded,
micaceous (SAPROLITE)
SD -5
44' Thin rock layer encountered, —0.5' thick
45
SD -6
(ML) SILT WITH SAND, dense, micaceous
(SAPROLITE)
(GW) GRAVEL, very dark greenish gray (5G
50
SD -
3/1), some sand, trace silt (SAPROLITE)

BORING NUMBER GWA-44D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
3: �
��
❑
w
-1 0
Z J
OJ ¢
-
o j
U LL1
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
UZ
L)
w
U
O
cU) Z
w
ry
50
(GW) GRAVEL, very dark greenish gray (5G
3/1), some sand, trace silt (SAPROLITE)
(continued)
BIOTITE GNEISS, strong, very dark greenish
gray (5G 3/1), massive (FRACTURED
ROCK)
55
RC -1
100
55.7'6" PVC casing installed and grouted to
QUARTZ BIOTITE GNEISS, light bluish gray
surface 2/8/16
(10B 8/1), foliated (SOUND ROCK)
60
BIOTITE GNEISS, dark bluish gray (10B 4/1)
and light bluish gray (10B 8/1), foliated,
aphanitic (SOUND ROCK)
RC -2
85
65
70
RC -3
93
[75]

BORING NUMBER GWA-44D
S. Church Street, Suite 900
Charlotte, 28202-2075
PAGE 4 OF 4
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
z
=
HW
�H-n-
YW
pU'
�
WW
O Z J-
p Q
W
o>
(� W
0>
DESCRIPTION
REMARKS
MO NITORING
WELL
W V
p
J O
aU
-j
000>
O
WO
Y
QO
UZ
W
w
O
75
BIOTITE GNEISS, dark bluish gray (10B 4/1)
and light bluish gray (10B 8/1), foliated,
Boring terminated at 77', screened interval
aphanitic (SOUND ROCK) (continued)
set at 70'-75', monitoring well installed on
2/12/16
Bottom of borehole at 77.0 feet.

BORING NUMBER GWA-44S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/11/16 COMPLETED 2/11/16 GROUND ELEVATION 766.15 HOLE SIZE(S) inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544236.09 EASTING 1176085.11
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY T. Campbell CHECKED BY �F DATE/TIME 2/12/2016 12:00:00 PM 40.40 ft
NOTES 1 DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3: Z J
J
Y
❑
U'
W
w Q
0 Q
W
0>
Y
DESCRIPTION
REMARKS
MONITORING
dU
m0>
0�0
❑
2--%
UZ
L)
w
U
O
U) Z
ry
rY
0
See GWA-44D for lithologic description
Drilled with truck -mounted sonic rig, drilled
11
IT
from surface, no samples collected
5
10
15
20
25

BORING NUMBER GWA-44S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
?�ZJJ�YY
❑
U'
a
W W'
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
❑
-1 O
aU
�❑¢
m0>
ORO
Y
2�
UZ
L)
w
U
O
rY
cU) Z
ry
25
See GWA-44D for lithologic description
(continued)
30
Well installed 2/11/16; screen 36.0-51.0'
35
TD=51.3' bgs
40
45
50

BORING NUMBER GWA-44S
S. Church Street, Suite 900
Charlotte, 28202-2075
PAGE 3 OF 3
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION
Cliffside, NC
z
=
HW
�H-n-
Yw
pU'
�R'
Lu w
O Z J-
p Q
W
o>
(� W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w V
p
-j 0
aU
-j
000>
O
wO
Y
QO
Oz
v
W
Lu
O
(n Z
of
50
See GWA-44D for lithologic description
(continued)
i ..
Bottom of borehole at 52.0 feet.

BORING NUMBER GWA-45D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/4/16 COMPLETED 2/12/16 GROUND ELEVATION 813.52 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543267.82 EASTING 1175816.16
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3:F-D��
Y�
❑
0
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
g�
Uz
L)
w
0
O
U) Z
IY
0
(SW -SM) WELL GRADED SAND WITH SILT
AND GRAVEL, pinkish gray (7.5YR 7/2),
non -plastic, dry, non -cohesive, abundant
Well installed on 2/12/16
gravel (FILL)
SD -1
72
5
--------------------
(ML) SILT WITH SAND, red (2.5YR 5/6),
plastic, moist, cohesive, trace gravel,
occasional root fragments, no relic rock fabric
present, minor carbonaceous organic matter
at 16' (FILL)
10
SD -2
120
15
60
SD -3
20
---------------------
(ML) SILT WITH SAND, reddish brown (5YR
5/4) (21-22.5'), non -plastic, moist,
non -cohesive 22.5-23.0', very dark gray (5YR
3/1), heavy root remains 23-26' (FILL)
SD - 4
60
25

BORING NUMBER GWA-45D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw❑
3:F-D-,�
YIY
C'J
w
W 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
m0>
0
0
U
2�
<Z
OZ
V
w
w
O
Lu
Uj
0
25
--------------------
(ML) SILT WITH SAND, red (2.5YR 5/6),
plastic, moist, cohesive, very uniform, highly
weathered, no relic rock fabric (SOIL)
35-36': same as above except color change to
light reddish brown (5YR 6/4)
30
SD -5
120
35
----------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, light brown (7.5YR 6/3), non -plastic,
moist, non -cohesive, micaceous, very
uniform, few rock (gneiss) fragments,
moderately weathered, poor relic rock fabric
(SAPROLITE)
40
SD -6
100
45
---------------------
(SP-SM) POORLY GRADED SAND WITH
SILT AND GRAVEL, light gray (10YR 7/2),
non -plastic, moist, non -cohesive,
approximately 20% partially weathered rock
fragments (SAPROLITE)
50
SD - 7
84

BORING NUMBER GWA-45D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
3�F ���
YY
❑
C'J
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
U
g�
UZ
L)
w
O
cU) Z
ry
50
(SP -SM) POORLY GRADED SAND WITH
SILT AND GRAVEL, light gray (10YR 7/2),
non -plastic, moist, non -cohesive,
approximately 20% partially weathered rock
fragments (SAPROLITE) (continued)
55
SD -8
96
60
60
SD -9
Top of Rock
BIOTITE GNEISS, very strong, white (N9 &
65
N/8.5), Grayish Brown (2.5Y 5/2), Dark
Grayish Green (5GY 4/2)Black (GLEY 1
2.5/N), and Light Bluish Gray (5PB 7/1),
alternating gneissic texture (60%) and
Bottom of 6" PVC casing set to 66' on
schistose texture (40%), thinly -foliated,
2/9/16
slightly decomposed, slightly disintegrated.
RC -1
100
70
Fracture density is not reported due to
excessive mechanical fracturing by
Roto -Sonic drilling method
Partially open fractures with Fe -staining and
pyrite mineralization at 73-74' (2 at 250 dip),
76.5-77'(2 at 200 & 850 dip), 78'(0-20 dip)
and 80.5-81'(900 dip)
75

BORING NUMBER GWA-45D
440 S. Church Street,
Suite 900
Charlotte, NC 28202-2075
PAGE 4 OF 4
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw❑
3:F-D-,�
YIY
C'J
w
W 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
Q-0
m0>
0
0
U
g�
OZ
V
w
w
O
c¢n Z
0
Uj
Lu
75
BIOTITE GNEISS, very strong, white (N9 &
N/8.5), Grayish Brown (2.5Y 5/2), Dark
RC -2
73
Grayish Green (5GY 4/2)Black (GLEY 1
2.5/N), and Light Bluish Gray (5PB 7/1),
alternating gneissic texture (60%) and
schistose texture (40%), thinly -foliated,
slightly decomposed, slightly disintegrated.
(continued)
80
Partially open fractures with Fe -staining and
pyrite mineralization at 81.6' (50 dip),
85-85.8' (2 at 900 & 701), 87.2-87.6' (901
dip), and 88.6-89' (3 at 50 and 1 at 900 dip)
85
RC -3
100
90
Bottom of borehole at 90.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-45D: Sample SC -1 Depth: 0.0' - 6.0' Date: 02/08/16
Photo 2 — GWA-45D: Sample SC -1 Depth: 0.0' - 6.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 3 — GWA-45D: Sample SC -1 Depth: 0.0'-6.0' Date: 02/08/16
Photo 4 — GWA-45D: Sample SC -2 Depth: 6.0' -16.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — GWA-45D: Sample SC -2 Depth: 6.0'-16.0' Date: 02/08/16
�MMkli
�MMMM
�MMMM
�MMY
Photo 6 — GWA-45D: Sample SC -2 Depth: 6.0'-16.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Y
Photo 7 — GWA-45D: Sample SC -3 Depth: 16.0'-21.0' Date: 02/08/16
[5rr'z: ccrrFsl,
�AT,F F�
�P��-i
25 26 27 28 29 30 31 _
Photo 8 — GWA-45D: Sample SC -3 Depth: 16.0'-21.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 9 — GWA-45D: Sample SC -3 Depth: 16.0'-21.0' Date: 02/08/16
Photo 10 — GWA-45D: Sample SC -4 Depth: 21.0'- 26.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
R?7 3? 39 39 40
Photo 11 — GWA-45D: Sample SC -4 Depth: 21.0'- 26.0'
cu<F10E s�ss 2ON R%G Full)
GL11F118 5P/Z4937S �0,e6
GNi4-usa IOG. ntc
�_9 12 Lc16
Nr-
Photo
G
4
Date: 02/08/16
Photo 12 — GWA-45D: Box 1 of 3 Depth: 66.0'- 77.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 02/12/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
C M-4 SM 2
F
770 +a FT 3 `l,
f'�Qti 2
AA SNECAAN
Photo 13 — GWA-45D: Box 2 of 3 Depth: 77.0'- 88.2' Date: 02/12/16
C.'4A TA c4P/264373
GWA-1450
Fe312 20x6
SB2+o IQaFr
M. SHEEHAI(\ _�
F
¢hx ' /oma y CASCAyn URI ILO r-YT
100 NG saHfc
t3ol�om a� horiny@Yo.o'
Photo 14 — GWA-45D: Box 3 of 3 Depth: 88.2'- 90.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 02/12/16

BORING NUMBER GWA-45S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/10/16 COMPLETED 2/11/16 GROUND ELEVATION 813.67 HOLE SIZE(S) 4, 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543264.18 EASTING 1175816.06
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY �F DATE/TIME 2/11/2016 50.00 ft
NOTES 1 DATE/TIME 2/10/2016 4:45:00 PM 50.50 ft
z
a ❑
�
o
a
2
> W
E W
<n w
3:Z J
Y�
❑
p
a
W
Q
J�
O�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
W v
—1 p
o
-j❑
m0>
O
O
Y
❑
-v
g�
OZ
�
w
U
O
U) Z
ry
rY
0
See Boring Log: GWA-45D
Drilled via 4"x6" sonic; water level open in
hole: 50' bgs on 2/11/2016
5
10
15
20
25

BORING NUMBER GWA-45S
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
3: JJ�Y�
❑
U'
ww
0
0❑¢
O j
p>
Y
DESCRIPTION
REMARKS
MONITORING
aU
m0>
ORO
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
See Boring Log: GWA-45D (continued)
11
IT
30
35
40
45
50

440 S. Church Street, Suite 900
Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Ener
PROJECT NUMBER
BORING NUMBER GWA-45S
PAGE 3 OF 3
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
See Boring Log: GWA-45D (continued)
Bottom of borehole at 56.0 feet.
®%A
z
a ❑o
a
>- W
E W
(n w
?�Z J
❑
w=
w 0
0❑¢
J�
o j
p>
Y
DESCRIPTION
REMARKS
MONITORING
mOUz
ORO
❑
Qo
Lu
o
--
U) Z
ry
rY
See Boring Log: GWA-45D (continued)
Bottom of borehole at 56.0 feet.
®%A

BORING NUMBER GWA-46D
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 1 OF 2
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/27/16 COMPLETED 2/29/16 GROUND ELEVATION 785.55 HOLE SIZE(S) 5, 9 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543651.41 EASTING 1177341.76
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Noffsinger CHECKED BY 7 DATE/TIME 3/1/2016 9:08:00 AM 22.10 ft
NOTES 1 DATE/TIME ---
Z
CY
�R'
Lu W
O Z J-
p Q
W
o>
0 W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w V
p
_j 0
aU
_j
030>
O
wO
Y
QO
OZ
v
W
W
O
() Z
0
(CH) FAT CLAY, stiff, yellowish red (5YR 4/6),
high plasticity, dry, cohesive, roots, black
stains (organic) (SOIL)
(SM) SILTY SAND WITH GRAVEL, reddish
yellow (7.5YR 6/8), loose, non -plastic, dry
5
SD -1
48
non -cohesive, micaceous quartz sand
(SAPROLITE)
5.0' same as above, red (1 OR 4/6), micaceous,
unconsolidated/consolidated (transition zone)
6.5' same, light yellowish brown (2.5Y 6/3)
SD -2
54
9.0' same, very pale brown (10YR 3/8)
10
48
SD -3
15
--------------------
BIOTITE GNEISS, strong, gray (2.5Y 6/1),
intensely foliated, Fe staining 15-16', garnets,
mechanical fractures are prevalent, 16-30'
;..
fresh
RC -1
59
20
2/29/16 - 13:00 hrs, well water pH=11.5
after very slow purge (— 5 gallons
..
25
i

F)�440 S. Church Street, Suite 900
Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Ener
PROJECT NUMBER
BORING NUMBER GWA-46D
PAGE 2OF2
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
Bottom of borehole at 30.0 feet.
z
wD
z
o
0
=
Of
HW
�H-D-jw
Y
CY
�
W W
O Z J-
p Q
W
o>
(� W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
W V
p
-j 0
aU
�
m0>
O
(if0
Y
QO
Oz
W
W
O
25
BIOTITE GNEISS, strong, gray (2.5Y 6/1),
intensely foliated, Fe staining 15-16', garnets,
47
mechanical fractures are prevalent, 16-30'
RC -2
fresh (continued)
.in
Bottom of borehole at 30.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-46D: Sample SC -1 Depth: 2.5' - 6.5' Date: 02/29/16
Photo 2 — GWA-46D: Sample SC -1 Depth: 2.5' - 6.5
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 02/29/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
y
2 3e4 5..x,.,.6 7 8 9 to 10
/J
Photo 3 — GWA-46D: Sample SC -1 Depth: 2.5' - 6.5' Date: 02/29/16
I
GWA-UG
CI;Ffs;de. 55 t„ ,
k #
Photo 4 — GWA-46D: Sample SC -2 Depth: 6.5' - 11.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — GWA-46D: Sample SC -2 Depth: 6.5' - 11.0'
Photo 6 — GWA-46D: Sample SC -2 Depth: 6.5' - 11.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
r�
Date: 02/29/16
Date: 02/29/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 7 — GWA-46D: Sample SC -3
Depth: 11.0'- 15.0' Date: 02/29/16
A-
Photo 8 — GWA-46D: Sample SC -3 Depth: 11.0'- 15.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 9 — GWA-46D: Box 1 of 1 Depth: 15.0'- 30.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-47D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/27/16 COMPLETED 2/29/16 GROUND ELEVATION 802.53 HOLE SIZE(S) 8, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 542672.01 EASTING 1177735.90
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY M. Sheehan CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3:F-D��
Y�
❑
0
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
g�
Uz
L)
w
0
O
U) Z
ry
0
(SM) SILTY SAND, predominantly red (2.5YR
5/8) to light red (2.5YR 6/8), non -plastic,
moist, non -cohesive, highly weathered
residuum (SOIL)
SD -1
84
5
---------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, predominantly pinkish gray (7.5YR
7/2), non -plastic, dry to slightly moist,
non -cohesive, highly weathered, uniform
composition, occasional felsic rock lenses,
no relic rock fabric (SOIL)
10
SD - 2
120
15
---------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, predominantly pinkish gray (7.5YR
7/2), non -plastic, dry to slightly moist,
non -cohesive, highly weathered, uniform
composition, occasional felsic rock lenses,
very poor relic gneiss rock fabric
20
(SAPROLITE)
SD - 3
120
25

BORING NUMBER GWA-47D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
3: �
��
❑
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
M0>
ORO
U
2�
¢
UZ
L)
w
O
W
Z
ry
25
--------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, light gray (10YR 7/2) and gray (10YR
6/1), non -plastic, dry, non -cohesive, highly
weathered, fine to medium grained sand,
approximately 20% rock present as 4 to 6"
lenses. (SAPROLITE/PWR)
30
Difficult drilling at 30-34'
SD -4
84
Top of rock at 32'
6" PVC surface casing set to 33' on 2/27/16
(SP -SM) POORLY GRADED SAND WITH
Drill 34-60' with 5" sonic
35
SILT, light gray (10YR 7/1), non -plastic,
moist, non -cohesive, loose, highly weathered
gneiss, thin (1") rock lenses
(SAPROLITE/PWR)
SD - 5
72
42-47': very uniform, very loose, sandy material
47-51': sample is saturated
40
SD -6
84
45
SD - 7
48
r.
50

440 S. Church Street, Suite 900
Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Ener
PROJECT NUMBER
BORING NUMBER GWA-47D
PAGE 3 OF 3
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
SD -8
1
--------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, light gray (10YR 7/1), non -plastic, wet,
cohesive, grading downward to dry and
non -cohesive, relic gneiss rock fabric
present, thin (1") rock lenses from 58-60'
(PWR)
Bottom of borehole at 60.0 feet.
Boring terminated at 60' due to potential for
core barrel to become lodged by loose
formation
z
a ❑o
a
=
>-IY
F W
to w
3�F
❑
_j 0
Z J
_j D Q
-
o j
U W
p>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
W
mOUz
ORO
❑
Qo
U Lu
o
--
U) Z
o_
W
SD -8
1
--------------------
(SP-SM) POORLY GRADED SAND WITH
SILT, light gray (10YR 7/1), non -plastic, wet,
cohesive, grading downward to dry and
non -cohesive, relic gneiss rock fabric
present, thin (1") rock lenses from 58-60'
(PWR)
Bottom of borehole at 60.0 feet.
Boring terminated at 60' due to potential for
core barrel to become lodged by loose
formation

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-47D: Sample SC -1 Depth: 0.0'- 7.0' Date: 02/27/16
j�
1 41 13 T4 1-5 E : 0 21 S'7 21
Photo 2 — GWA-47D: Sample SC -1
Depth: 0.0'- 7.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
,A
4

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
17
1
517EF'cLI ��S I
�� sS
I3d2�A's Gwq-µ7D
BATE: f-E927,Zo)r.
PEP
0-7 FT
Photo 4 — GWA-47D: Sample SC -1 Depth: 0.0'- 7.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
r
RT
Photo 3 —
GWA-47D: Sample
SC -1 Depth: 0.0'- 7.0' Date: 02/27/16
Naw
`!,.
qaz
as as o; ao a�
o cu s^. sa s
si -- _ nz s a a'i
17
1
517EF'cLI ��S I
�� sS
I3d2�A's Gwq-µ7D
BATE: f-E927,Zo)r.
PEP
0-7 FT
Photo 4 — GWA-47D: Sample SC -1 Depth: 0.0'- 7.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — GWA-47D: Sample SC -1 Depth: 0.0'- 7.0' Date: 02/27/16
Photo 6 — GWA-47D: Sample SC -1
Depth: 0.0'- 7.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
A
f'�..�j'J �y., 1. YYII Ch1 ems' 7:'--.• -
.l' - 1{/71 s_•/ - .F4::. � ..
li
! `Y
Photo 7 — GWA-47D: Sample SC -2 Depth: 7.0'- 17.0' Date: 02/27/16
k" Ila
t err
Or
N
Photo 8 — GWA-47D: Sample SC -2
7 18 19 20, `3 21 2Z
a. _- .�
Depth: 7.0'- 17.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
q .Ar
_.. - ...'27 28 29 30 3� - ,-
Photo 9 — GWA-47D: Sample SC -2 Depth: 7.0'- 17.0'
7;w7;1
h.w 3
19
Date: 02/27/16
M 17 18 ?,9 44; 4S 42 43 44 45 46 47 49 So 5 T 52 53rt 54 55 56 57 59 Fi3 ,2
Photo 10 — GWA-47D: Sample SC -2 Depth: 7.0'- 17.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
�bR,uG: GWA-t�-
DATA f.E8 27, 2.Q
7-17/
TOP
Date: 02/27/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
j17g'C(,1FFSlf!,
I?DIZiAjG GWA-tL
T)A-r -: FE 9 7-7, 2 o
o><mw 7-171
SAMPLE#: Se--;
TOP R
Photo 11 — GWA-47D: Sample SC -2 Depth: 7.0'- 17.0' Date: 02/27/16
3 76 77 78 79 ''" 81 82 83 [fl 85 86 87 88 '" o>Y-98' 99 100 IOr 102 107 104,r05 106 h
n �Ja i
yr
v
. t
.�u
_ r i
k.
l:S
i - 0
r9
f
Photo 12 — GWA-47D: Sample SC -2 Depth: 7.0'- 17.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
I. A, , Y 30
„ 131 IM 133 134 135 136 131 138 134 1110 Ial la] IP3
11B 119 SF:7 121 122 123 124 125 124 12T 129 1
1141
Y -Y fpm - ]idY� §Y �• �i�.} aC����IR'° .. -�
IN
-�� `` b 'je 4 S.� c�'�aY t�7 �L% ,a I �,� L '.' �1'._. ` �.'- ��•;
by
Photo 13 — GWA-47D: Sample SC -2 Depth: 7.0'- 17.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Photo 14
— GWA-47D: Sample SC -3
Depth: 17.0'- 27.0'
Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
vi
A
Photo 15 — GWA-47D: Sample SC -3 Depth: 17.0'- 27.0' Date: 02/27/16
o ,
h� �v. 3n 41 34 SS Fh 31 3$ 39 40
Photo 16 — GWA-47D: Sample SC -3 Depth: 17.0'- 27.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 17 — GWA-47D: Sample SC -3 Depth: 17.0'- 27.0' Date: 02/27/16
M�a: � � Jr .rte '�7' s ,., �t T." x.�ei4�: � �. ►-S_'.-
91 91 93 94 95 "+ 47 9@ 49 199 101 142 1O3 104 105, 106 109 Q71 109 110 111 n.. ii] il4 I%5 I'Ib ll� /lB I19� 3
Photo 18 — GWA-47D: Sample SC -3 Depth: 17.0'- 27.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 19 — GWA-47D: Sample SC -3 Depth: 17.0'- 27.0' Date: 02/27/16
Photo 20 — GWA-47D: Sample SC -4 Depth: 27.0'- 34.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
r All
�4
4
,.. "i�i:1 n, _ > ;;mh �' ,�i[Fi+.'�Fi�iliLt-�.:fw-�- S.rt�.z=`" %�5��•a _. _..
Depth: 27.0'- 34.0'
Date: 02/27/16
R9
V '�
I 45 46 47 49 50 5! 57 53 cl C= 2 .. .4
Photo 22 — GWA-47D: Sample SC -4 Depth: 27.0'- 34.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 23 — GWA-47D: Sample SC -4 Depth: 27.0'- 34.0' Date: 02/27/16
's
'E'.CL�FFSi�� 55
zwr,'- GwA-4-71)
'r S' FEB Z*7,?-o)(-
=).sN : 2'7- 34 F i
4MPLJ5 : 5c -4-
I L' P L F31-7-TwA
41"M W
�9 94 9J f.'Y 9T V9 99 1Ch! /Ol
Photo 24 — GWA-47D: Sample SC -4 Depth: 27.0'- 34.0' Date: 02/27/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 25 — GWA-47D: Sample SC -4 Depth: 27.0'- 34.0' Date: 02/27/16
Photo 26 — GWA-47D: Sample SC -5 Depth: 34.0'- 40.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 ��
Appendix A, Sample Photographs
14 7, 71 22 2i TJ 2 27
Photo 27 — GWA-47D: Sample SC -5 Depth: 34.0'- 40.0' Date: 02/29/16
k 4� ,,ter int
-.
•�.� pi ., x ��'IY p '� �: i?g... ��l M �wl,,y �, d ip � � y, �. �. �/ ,!{e_�.� i. �y;.,
a J
R �+.
.T � mgr •.. � - . � � '..
I 35 E!1 ]) 38 34 40 Al hl 73 49, 45 46 )
-. _ -_ ...-. :t.=1WTOSP s"SL : :'n .9Kr �•�`.. ... LXv
MIIMIMN
MMar11y i
Photo 28 — GWA-47D: Sample SC -5 Depth: 34.0'- 40.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 ��
Appendix A, Sample Photographs
Photo 29 — GWA-47D: Sample SC -6 Depth: 40.0'- 47.0' Date: 02/29/16
71P
Photo 30 — GWA-47D: Sample SC -6 Depth: 40.0'- 47.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
.. 1W r,
.i
F +'
•..� Y ,rte- _�. .m._-.a.'� o� _.Y . _ ,. a
Photo 31 — GWA-47D: Sample SC -6 Depth: 40.0'- 47.0' Date: 02/29/16
Photo 32 — GWA-47D: Sample SC -6 Depth: 40.0'- 47.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
SIT'CL1FF51�
GwA
(o
DATF FE 29, 2-001
-47 P7
�
ii
�'MMIIOi�
TOP Per
old
4-
Photo 31 — GWA-47D: Sample SC -6 Depth: 40.0'- 47.0' Date: 02/29/16
Photo 32 — GWA-47D: Sample SC -6 Depth: 40.0'- 47.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 33 — GWA-47D: Sample SC -8 Depth: 51.0'- 60.0' Date: 02/29/16
o
7,Fp ...
Photo 34 — GWA-47D: Sample SC -8 Depth: 51.0'- 60.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
ki. -&)C-VK%W Ilk, 14ft-Y-A.-'v%&-M
Photo 35 — GWA-47D: Sample SC -8
�3o1riNG- GW4-f+7
Tj qTF f E S 29, ?-0)
66 t
j U P h3o
Depth: 51.0'- 60.0' Date: 02/29/16
hdrinc.com
Photo 36 — GWA-47D: Sample SC -8 Depth: 51.0'- 60.0' Date: 02/29/16
440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
/L
1A .y
Photo 37 — GWA-47D: Sample SC -8 Depth: 51.0'- 60.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-48BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/7/16 COMPLETED 3/11/16 GROUND ELEVATION 805.54 HOLE SIZE(S) 5, 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543048.02 EASTING 1179539.18
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY T DATE/TIME 2/12/2016 12:08:00 PM 36.80 ft
NOTES 1 DATE/TIME ---
Z
=
�W
F W
<nw❑
3:F-Z)-,�
YO_
C'1
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
0_0
m0>
0
0
g�
OZ
Q
w
U
O
U) Z
ry
0
(GP) POORLY SORTED GRAVEL WITH
Abundant muscovite and biotite grains,
SAND, alternating bands of reddish yellow
plagioclase and quartz clasts and grains
(7.5YR 6/6), yellow (10YR 7/8), yellowish red
common 0-55'
(5YR 5/6) and red (2.5YR 4/6 & 4/8), dry,
non -plastic, non -cohesive, some fine to
coarse sand, trace silt, hematite -staining
common locally (RESIDUUM)
5
SD -1
10
15
SD -2
20
25

BORING NUMBER GWA-48BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
U) U.1
?�F ���
YO
❑
O
w
_j 0
Z J
_j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
0
2�
¢Z
UZ
L)
w
O
ci�
�
�
25
(GP) POORLY SORTED GRAVEL WITH
SAND, alternating bands of reddish yellow
(7.5YR 6/6), yellow (10YR 7/8), yellowish red
(5YR 5/6) and red (2.5YR 4/6 & 4/8), dry,
non -plastic, non -cohesive, some fine to
coarse sand, trace silt, hematite -staining
common locally (RESIDUUM) (continued)
30
35
SD -4
40
(CL) GRAVELLY LEAN CLAY WITH SAND,
banded and mottled red (2.5YR 4/8),
brownish yellow (10YR 6/8), and dark gray
(10YR 4/1), moist, low plasticity, cohesive,
some silt, some fine to coarse sand and fine
gravel, trace medium to coarse gravel,
hematite -staining common, relic foliation
planes present, large clasts of weathered
biotite gneiss (SAPROLITE)
45
SD -5
50

BORING NUMBER GWA-48BR
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 3 OF 5
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
Z
=
�
HW
Lu W
�:H-n
O Z J-
p Q
W
o>
YW
0 W
0>
CY
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w V
p
_j 0
aU
_j
000>
O
wO
Y
QO
Oz
v
W
Lu
O
cn Z
50
(CL) GRAVELLY LEAN CLAY WITH SAND,
mottled yellowish brown (10YR 5/6), dark
yellowish brown (10YR 4/4), brownish yellow
(10YR 6/6), red (2.5YR 4/8) and dark gray
(10YR 4/1), wet, low plasticity, cohesive,
some silt, fine to coarse sand, fine gravel,
trace medium to coarse gravel, relic foliation
planes present, clasts of biotite gneiss
(SAPROLITE)
55
SD - 6
Assume high fracture density due to the
BIOTITE GNEISS, very strong, black (GLEY
1 2.5/N) and white (white page N/8),
abundant broken bedrock fragments,
alternating gneissic texture (50%) and
marked changes to high drilling resistance
schistose texture (50%), medium foliated,
at 60'.
slightly decomposed, slightly
disintegrated, abundant biotite, augens
present locally, garnet porphyroblasts are
common locally, (PARTIALLY WEATHERED
BEDROCK)
60
competent bedrock encountered at 60' bgs
BIOTITE GNEISS very strong, black (GLEY 1
2.5/N) and white (white page N/8), with
localized strong brown (7.5yr 5/8), intensely
Fracture density is not reported due to
fractured and hematite weathered interval at
excessive mechanical fracturing by
62.4-64.1', alternating gneissic texture (80%)
Roto -Sonic drilling method.
and schistose texture (20%), medium
Highly broken interval at 62.4-64.1' may be
foliated, fresh to slightly decomposed, slightly
natural fractures rather than mechanical
disintegrated, augens and garnet
fractures due to hematite staining, open
porphyroblasts are common locally,
horizon to subhorizontal fractures along
foliation planes common in the interval
65
RC -1
64.2-65.0'.
Very intensely fractured, hematite -stained
BIOTITE GNEISS consisting of biotite gneiss,
moderate to strong, yellowish brown (10YR
fracture surfaces are common, two partially
5/8), strong brown (7.5 YR 5/8), red (2.5YR
open hematite -stained fractures observed
70
4/8), black (GLEY 12.5/N) and white (white
page N/8), alternating gneissic texture (50%)
dipping at 300 at 68.3' and 65° at 69'
and schistose texture (50%), thinly foliated,
moderately decomposed, slightly to
moderately disintegrated, augens and garnet
porphyroblasts are common locally.
(PARTIALLY WEATHERED BEDROCK)
Same as described for 60-68'
75

BORING NUMBER GWA-48BR
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 4 OF 5
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
Z
=
HW
�H-n_
YW
pU'
�
V
Lu W
0
O Z J-
p Q
W
o>
0 W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w
p
_j
aU
_j
000>
O
wO
Y
QO
UZ
W
w
O
75
Same as described for 60-68' (continued)
Highly broken interval at 76-82' may be
BIOTITE GNEISS strong, black (GLEY 1
2.5/N) and white (white page N/8), alternating
natural fractures but absence of
gneissic texture (50%) and schistose texture
mineralization and staining along presumed
(50%), thin to medium foliated, slightly
fracture planes limits the ability to make a
decomposed, slightly disintegrated, augens
definitive determination
and garnet porphyroblasts are common
locally.
80
Intensely weathered and fractured,
i
(GP) POORLY GRADED GRAVEL WITH
SAND, grayish brown (10YR 5/2), and dark
hematite -stained fracture surfaces are
gray (10YR 4/1), non -plastic, wet,
common
non -cohesive, some very fine to coarse sand,
little silt, with large blocks and clasts of
bedrock fragments consisting of biotite
85
RC -3
gneiss, black (GLEY 12.5/N) and white (white
page N/8) and red (2.5YR 4/8), alternating
gneissic texture (50%) and schistose texture
(50%), thinly foliated, moderately
decomposed, augens and garnet
porphyroblasts are common locally
(PARTIALLY WEATHERED BEDROCK AND
SAPROLITE)
90
Open horizontal fractures along foliation
BIOTITE GNEISS very strong, black (GLEY 1
2.5/N) and white (white page N/8), alternating
planes observed at 95.5' and 97.3', open
gneissic texture (70%) and schistose texture
vertical to near vertical fractures at
(30%), medium foliated, fresh to slightly
91.8-92.1', 93-93.4', and 96.5-96.8'
decomposed, competent to slightly
disintegrated, augens and garnet
porphyroblasts are common locally.
95
RC -4
Two partially open fractures lined with pyrite
mineralization dipping at 100 at 99.2-100'
and two partial open fractures line with
pyrite mineralization dipping 85-90° at
100

440 S. Church Street, Suite 900
Charlotte, 28202-2075
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Ener
PROJECT NUMBER
BORING NUMBER GWA-48BR
PAGE 5 OF 5
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
it
RC -5
M1
BIOTITE GNEISS very strong, black (GLEY 1 Partially open fractures at 100.7' dipping
2.5/N), white (white page N/8) and dark gray 150, 103.8' dipping 10°, 104-104.5 dipping
(10YR 4/1), alternating gneissic texture (50%) 551, 105.5' dipping 51, 107-107.5' dipping
and schistose texture (50%), thinly to 85-900, 107.8-108.5' dipping 900, 108.2
medium foliated, fresh, competent to slightly dipping 50, 109.8-110.3' dipping 400, and
disintegrated, augens and garnet 109.8-110.3' dipping 700
porphyroblasts are common locally. All partially open fractures are lined with
pyrite mineralization
Bottom of borehole at 111.0 feet.
z
a ❑o
a
=
>-IY
F W
to w
❑
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
W
dU
m0>
ORO
❑
UZ
Uj
W
U
QO
U) Z
0
100
it
RC -5
M1
BIOTITE GNEISS very strong, black (GLEY 1 Partially open fractures at 100.7' dipping
2.5/N), white (white page N/8) and dark gray 150, 103.8' dipping 10°, 104-104.5 dipping
(10YR 4/1), alternating gneissic texture (50%) 551, 105.5' dipping 51, 107-107.5' dipping
and schistose texture (50%), thinly to 85-900, 107.8-108.5' dipping 900, 108.2
medium foliated, fresh, competent to slightly dipping 50, 109.8-110.3' dipping 400, and
disintegrated, augens and garnet 109.8-110.3' dipping 700
porphyroblasts are common locally. All partially open fractures are lined with
pyrite mineralization
Bottom of borehole at 111.0 feet.

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 1 — GWA-48BR: Sample SC -1 Depth: 0.0'- 10.0' Date: 03/07/16
Photo 2 — GWA-48BR: Sample SC -1 Depth: 0.0'- 5.0' Date: 03/07/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
TOP OF
RUN
BOTTOM
OF RUN
Photo 3 — GWA-48BR: Sample SC -1 Depth: 5.0'- 10.0' Date: 03/07/16
TOP OF
RUN
BOTTOM
OF RUN
Photo 4 — GWA-48BR: Sample SC -2 Depth: 10.0' - 20.0' Date: 03/07/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — GWA-48BR: Sample SC -3
TOP OF I
RUN
BOTTOM
OF RUN
K
Depth: 20.0'- 30.0'
' WIN
i
Photo 6 — GWA-48BR: Sample SC -3
R
Depth: 20.0'- 25.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/07/16
Date: 03/07/16
tiFNT UKE E9
e CyIFIFSIDE.
Yrii ,U GWA-H$SR
�?„nM irrc�wlL Frr e�. •,� i(J- �' l
^1'icy. J .
e M 3/7/rE
�.rWnrw :T Dao HISO
Rum 3
J
Photo 6 — GWA-48BR: Sample SC -3
R
Depth: 20.0'- 25.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/07/16
Date: 03/07/16

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
TOP OF
RUN
t�l:s.liLE JS
vr�� Ir, GW,A—y88R
vrcnvn�lv-r ea:�
y�n� �M . UN 3
T D4N B15NUK
-• RUN3
CLOSF—UP 25-30
BOTTOM
OF RUN
IIt27"T 1111-'--*'. 110
Photo 7 — GWA-48BR: Sample SC -3 Depth: 25.0'- 30.0' Date: 03/07/16
TOP OF
RUN
:LIEN'
SITE
:f' yY
u CWA kfbBR
yEPfH IMfERVAL (FT BT s) J�'iU
DATE M-3/i'f6
,.. DAN LWISWIK
[ AHEATS RUN 11
BOTTOM
OF RUN
Photo 8 — GWA-48BR: Sample SC -4 Depth: 30.0'- 40.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/07/16

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 9 — GWA-48BR: Sample SC -4 Depth: 30.0'- 35.0' Date: 03/07/16
TOP OF
RUN I•�
BOTTOM
OF RUN
Photo 10 — GWA-48BR: Sample SC -4 Depth: 35.0'- 40.0' Date: 03/07/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 11 — GWA-48BR: Sample SC -5 Depth: 40.0'- 50.0' Date: 03/07/16
TOP OF
r
RUN I,
G�lOri IT _
MNEkrS
_ Ci
BOTTOM
OF RUN
Photo 12 — GWA-48BR: Sample SC -5 Depth: 40.0'- 43.0' Date: 03/07/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 13 — GWA-48BR: Sample SC -5 Depth: 45.0'- 50.0' Date: 03/08/16
TOP OF
RUN
BOTTOM
OF RUN
Photo 14 — GWA-48BR: Sample SC -6 Depth: 50.0'- 60.0' Date: 03/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
TOP OF �` `•
RUN .� r
i:• x-
,`
T` JT -
1 f
1. +
�cLrEr+r
D+�KE ENERG 1:
Si7E CLf«SjM S5
Ir a +D (;WA-g913K
UfPI"N IMTERVAL (LT BGS) _� •. ' - -
V.
.Eoiocl.sr IPAt4 8/S14UG
00 -cup S0 -53p s
BOTTOM
OF RUN -�
Photo 15 — GWA-48BR: Sample SC -6
TOP OF
RUN
BOTTOM
OF RUN
Depth: 50.0'- 53.0' Date: 03/08/16
A'
Photo 16 — GWA-48BR: Sample SC -6 Depth: 53.0'- 55.0' Date: 03/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 17 — GWA-48BR: Sample SC -6 Depth: 55.0'- 60.0' Date: 03/08/16
Photo 18 — GWA-48BR: Box 1 of 4 Depth: 62.0'- 75.0' Date: 03/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs
ft!w�
PUKE GY -
-..
PAN
Photo 19 - GWA-48BR: Box 2 of 4 Depth: 75.0'- 91.0
DUKE CAMZG CuF)rsr
CSA DATA GAP /z,;�9373
( WA -495K ql --1Q2
F 3/11116
Date: 03/11/16
oar
-.
RAN 5157YUK Fox 3 Orr _ �--
:
^RUI-,
Photo 20 - GWA-48BR: Box 3 of 4 Depth: 91.0'- 102.0' Date: 03/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2
Appendix A, Sample Photographs
Photo 21 — GWA-48BR: Box 4 of 4 Depth: 102.0'- 111.0' Date: 03/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER MW-23S
S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 1 OF 2
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 3/1/16 COMPLETED 3/1/16 GROUND ELEVATION 730.94 HOLE SIZE(S) 5 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544296.91 EASTING 1176385.60
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME -
NOTES DATE/TIME ---
Z
=
HW
-n
Y
CY
�
V
Lu W
O
O Z J-
p Q
W
o>
W 0
O>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w
p
_j
mo
_j
m0>
O
WO
Y
QO
OZ
v
W
W
O
r) Z
0
Grass and Leaf Litter then (ML) SANDY SILT,
brown (10YR 4/3), cohesive, moist, some fine
to coarse sand, trace fine gravel, abundant
Well installed 3/1/16
muscovite grains, plagioclase feldspar clasts
(CL) GRAVELLY LEAN CLAY WITH SAND,
mottled appearance with yellowish brown
(10YR 5/6 & 5/), Gray (10YR 6/1) and Red
(2.5YR 4/6); Dry; low plasticity, cohesive,
SD-1
84
some silt, little fine gravel, few fine to coarse
sand, abundant muscovite & plagioclase
5
feldspar grains
(CL) LEAN CLAY WITH SAND, mottled red
(2.5YR 4/8), dark reddish gray (2.5YR 4/1),
brown (7.5YR 5/4), and dark brown (7.5YR
3/4), moist, low plasticity, cohesive, some silt,
some fine to coarse sand, mica, quartz and
plagioclase feldspar grains present
(ML) SILT WITH SAND, mottled brown (10YR
4/3 & 5/3) and pale brown (10YR 6/3), moist,
non-plastic, cohesive, some fine to coarse
sand (abundant mica grains)
(CL) LEAN CLAY WITH SAND, red (2.5YR
4/8) and trace dark reddish gray (2.5YR 3/1),
10
wet, low plasticity, cohesive, some fine to
medium sand, trace coarse sand and fine
gravel, mica, quartz, and plagioclase feldspar
grains present
SD-2
120
(SM) SILTY SAND, light brownish gray (10YR
15
6/2), wet, non-plastic, non-cohesive, little silt,
abundant mica grains
(ML) SILT WITH SAND, mottled yellowish
brown (10YR 5/6), brownish yellow (10YR
6/6) and very pale brown (10YR 7/4), wet,
non-plastic, cohesive, some fine to coarse
sand, abundant mica grains
20
(SM) SILTY SAND, mottled yellowish brown
(10YR 5/6) and brownish yellow (10YR 6/6),
SD - 3
120
wet, non-plastic, cohesive, abundant mica
grains
25

BORING NUMBER MW -23S
S. Church Street,
Suite 900
Charlotte, 28202-2075
PAGE 2 OF 2
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION
Cliffside, NC
z
=
HW
�H-n_
YW
pU'
�
WW
O Z J-
p Q
W
o>
(� W
0>
DESCRIPTION
REMARKS
MO NITORING
WELL
W V
p
J O
aU
_j
000>
O
WO
Y
QO
Oz
W
W
O
25
(SM) SILTY SAND, mottled yellowish brown
(10YR 5/6) and brownish yellow (10YR 6/6),
wet, non -plastic, cohesive, abundant mica
grains (continued)
Bottom of borehole at 27.0 feet.

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
NIN
"
'I .. -/fit ,' ..t �..JT _ a}•.� I
Photo 1 — MW -23S: Sample SC -1 Depth: 0.0'- 6.0' Date: 03/01/16
Photo 2 — MW -23S: Sample SC -1 Depth: 1.0'- 3.0' Date: 03/01/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 3 — MW -23S: Sample SC -1 Depth: 3.0'- 5.0' Date: 03/01/16
iEMT DUKEENIEIEGY
.TE CLIFFS+D£ S$
Li L MW- 23S
+.c 3/1/16
�.racusr PAN 01SNUIt
..,r..•, RUW'� I
i u+st r'r = r7 a:5
Photo 4 — MW -23S: Sample SC -1 Depth: 5.0'- 7.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/01/16

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — MW -23S: Sample SC -2
TOP OF
RUN
BOTTOM
OF RUN
Depth: 7.0'- 17.0'
Photo 6 — MW -23S: Sample SC -2 Depth: 9.0'- 11.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/01/16
Date: 03/01/16

TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
53S„t r-LlFisi 23 i
uuL .o Mw—..„ i i —13
Photo 7 — MW -23S: Sample SC -2 Depth: 11.0'- 13.0' Date: 03/01/16
TOP OF
RUN
BOTTOM
OF RUN
.L1ENT VVKE ENEK&Y
SITE CLIFFSIy+E SS
wEu ,n MW— 23S
pwm irruv& ('-r ens) ) 3 —15
a+TF- 3/1/16
&Eo ocur DAN S/SHUK
CAAA"15 R U N -0 2
ULDSFUP 1`x-15 FT- DGS
a
Photo 8 — MW -23S: Sample SC -2 Depth: 13.0'- 15.0' Date: 03/01/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
[ �IA
Photo 9 — MW -23S: Sample SC -2 Depth: 15.0'- 17.0'
Photo 10 — MW -23S: Sample SC -3 Depth: 17.0'- 27.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
- Nk
Date: 03/01/16
Date: 03/01/16

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 11 — MW -23S: Sample SC -3 Depth: 19.0'- 21.0' Date: 03/01/16
LIEN
lI TE
Photo 12 — MW -23S: Sample SC -3 Depth: 21.0' - 23.0' Date: 03/01/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

TOP OF
RUN
BOTTOM
OF RUN
TOP OF
RUN
BOTTOM
OF RUN
Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
LUFE t;kfRI.Y
CLIFFSOM SS
mW-235-
Photo
W-235_
Photo 16 — MW -23S: Sample SC -3 Depth: 23.0'- 25.0'
Photo 17 — MW -23S: Sample SC -3 Depth: 25.0'- 27.0'
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Date: 03/01/16
Date: 03/01/16

BORING NUMBER U5-2BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 2/17/16 COMPLETED GROUND ELEVATION 792.11 HOLE SIZE(S) 10 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544669.18 EASTING 1172562.42
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY CHECKED BY DATE/TIME --
NOTES DATE/TIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3: F- Z)
❑
w
w 0
Z J
0¢
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
dU
m0>
0�0
❑
2--%
OZ
0
w
U
O
U) Z
ry
rY
0
Refer to U5 -2A Boring Log
Did not retain or describe core. Six inch
PVC casing installed from ground surface to
74 feet bgs.
5
10
15
20
25

BORING NUMBER U5-2BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
3: J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
30
35
40
45
50

BORING NUMBER U5-2BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
=
�W
F W
<nw
3�F ���
❑
w
-1 0
Z J
-J D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
UZ
L)
w
U
O
c¢i� Z
ry
rY
50
55
Finished coring surface casing installation
60
65
70
2/18/16 10 am.
Unconsolidated Material
QUARTZ GNEISS, Very hard, slightly
weathered, white (W 9/), medium to very
coarse grained, joint stained black, low angle
very thin
75

BORING NUMBER U5-2BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 5
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
3: �
��
❑
w
� 0
Z J
_J D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
g�
UZ
L)
w
U
O
cU) Z
ry
75
QUARTZ GNEISS, Hard, fresh, white (9/ to
8/), coarse grained angular, joint fractures,
I rough tight cause_ horizontal— _ _ _
BIOTITE GNEISS, Grades to medium to fine
pinkish gray (7.5R 7/1), grades back to white
(9/ - 8/), coarse grained angular Quartz
Gneiss
80
RC -1
75
Possible fracture and lost water circulation
at 80' bgs
85
Possible fracture and lost water circulation
at 85' bgs
90
RC -2
90
Soft at 91'
BIOTITE GNEISS, Hard, fresh, medium to
fine, dark gray (5Y 4/ - 3/), joint, rough close
horizontal
Soft at 94'
95
Soft at 96'
Complete rod drop at 97 to 100 feet bgs.
Possible void
100

F)�440 S. Church Street, Suite 900
Charlotte, 28 75
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Ener
PROJECT NUMBER
BORING NUMBER U5-2BR
PAGE 5OF5
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT LOCATION Cliffside, NC
M1
BIOTITE GNEISS, Hard, slight to moderate
weathering, pinkish gray (5YR 7/2 - 7/8), fine
3 50 to coarse grained, joints, rough, close, vuggy Backfilled borehole with bentonite from 101
with secondary porosity (channels), low to 104'
recovery, voids, Fe/Mn staining
Bottom of borehole at 106.0 feet.
z
wD
z
o
0
H
HW
�Z J
JW
YW
GY
w
J 0
a� Q
o>
0>
Y
DESCRIPTION
REMARKS
MONITORING
p
o U
m0>
O
(if0
QO
Oz
W
W
O
z
100
M1
BIOTITE GNEISS, Hard, slight to moderate
weathering, pinkish gray (5YR 7/2 - 7/8), fine
3 50 to coarse grained, joints, rough, close, vuggy Backfilled borehole with bentonite from 101
with secondary porosity (channels), low to 104'
recovery, voids, Fe/Mn staining
Bottom of borehole at 106.0 feet.

BORING NUMBER U5 -2S -SL -A
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 6/19/16 COMPLETED 6/22/16 GROUND ELEVATION 792.39 HOLE SIZE(S) 5 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 544669.35 EASTING 1172556.45
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
z
a ❑
�
o
a
2
>
E W
<n w
3:Z J
❑
a
w
W
Q
J�
W
O w
U W
O>
DESCRIPTION
REMARKS
MONITORING
WELL
W
O
Q-0
0❑
coo>
O
O
Y
❑
g�
UZ
L)
w
U
O
U) Z
ry
rY
0
5
10
15
20
25

BORING NUMBER U5 -2S -SL -A
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
3: J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
30
IT
35
40
45
50

BORING NUMBER U5-2S-SL-A
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
PAGE 3 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post-CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
wZ
=
�W
F W
<nw
3: �
��
❑
w
-1 0
Z J
OJ ¢
-
O j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
aU
m0>
ORO
❑
g�
UZ
L)
w
U
O
c¢i� Z
ry
rY
50
55
Ak
60
65

BORING NUMBER U5 -3S -A
440 S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 1 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Cliffside - CSA Groundwater Assessment
PROJECT NUMBER 244797 PROJECT LOCATION Cleveland and Rutherford Counties, NC
DATE STARTED 2/26/16 COMPLETED 2/26/16 GROUND ELEVATION TBD HOLE SIZE(S) 6 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 545045.317 EASTING 1172637.994
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY W. Maynard CHECKED BY DATE/TIME ---
NOTES Unit 5 Inactive Ash Basin DATE/TIME ---
LLJ �
c
o
e
} IY
(n W
Z J
>-
LLI
p
d
w w
J O
O
J p Q
w
U
p>
DESCRIPTION
REMARKS
MONITORING
WELL
Lu
p
dU
CO > 0
O
w�
Y
U
20
UZ
w
w
0
n
coO
0
`See U5 -3S for Lithology'
5
I
I
I
10
15
20
25

0
m
H
O
(D
Q
J
cn
J)
z
z
0
0
z
z
w
0
m
z
z
BORING NUMBER U5 -3S -A
440 S. Church Street, Suite 900
Charlotte, 28202-2075 PAGE 2 OF 3
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy Carolinas PROJECT NAME Cliffside - CSA Groundwater Assessment
PROJECT NUMBER 244797 PROJECT LOCATION Cleveland and Rutherford Counties, NC
LLJ �
c
o
e
} IY
(n W
z J
>-
LU
p
dw
w
O
p
J Q
w
U
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w
p
0-(m0>
Opp
U
�0
UZ
w
�
O
J)
0
25
30
35
40
45
50

440 S. Church Street, Suite 900
F)"'Z Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy Carolinas
PROJECT NUMBER 244797
66101
BORING NUMBER U5 -3S -A
PAGE 3OF3
PROJECT NAME Cliff side - CSA Groundwater Assessment
PROJECT LOCATION Cleveland and Rutherford Counties.
DESCRIPTION
Bottom of borehole at 57.0 feet.
REMARKS
NC
WELL
w j
c
o
0
U) W
i
p
aw
pv
w
��
0Z -i
m0>
w
O
U�
afO
0
Y
g
UZ
w
W
cQ Z
w
O
w
W
66101
BORING NUMBER U5 -3S -A
PAGE 3OF3
PROJECT NAME Cliff side - CSA Groundwater Assessment
PROJECT LOCATION Cleveland and Rutherford Counties.
DESCRIPTION
Bottom of borehole at 57.0 feet.
REMARKS
NC
WELL

BORING NUMBER U5-8BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 1 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
DATE STARTED 1/29/16 COMPLETED 2/2/16 GROUND ELEVATION 770.54 HOLE SIZE(S) 9 3/8, 4 1/2 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING 543330.49 EASTING 1174610.73
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY D. Bishuk CHECKED BY DATE/TIME --
NOTES DATEITIME ---
z
a ❑
�
o
a
=
> W
F W
<n w
3: F- Z)
❑
w
w W
Z J
0 ¢
-
O j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
aU
m0>
OHO
❑
2--%
OZ
0
w
U
O
U) Z
ry
rY
0
See U5 -8D for lithology 0'-77'
5
10
15
20
25

BORING NUMBER U5-8BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
�Z J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
2�
UZ
L)
w
U
O
c¢i� Z
ry
rY
25
30
35
40
45
50

BORING NUMBER U5-8BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
c
o
2
�W
E W
<nw
�Z J
❑
a
W W'
J�
W
o�
U W
p>
DESCRIPTION
REMARKS
MONITORING
WELL
w v
-1 O
aU
�❑¢
m0>
ORO
Y
❑
g�
UZ
L)
w
U
O
c¢i� Z
ry
rY
50
55
60
65
70
75

BORING NUMBER U5-8BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
2
�W
E W
<nw
3: J
J�
❑
a v
W
0
❑ ¢
W
O �
U W
0 >
DESCRIPTION
REMARKS
MONITORING
WELL
W
❑
—1
Q-0
-j
m0>
ORO
Y
0
g�
UZ
L)
w
O
rY
cw Z
ry
75
76.8'6" PVC casing installed and grouted to
BIOTITE-QUARTZ-PLAGIOCLASE GNEISS,
surface 1/30/16
strong to very strong, white (9N), light bluish
77'-127' Augens are common, smokey
gray (5PB 7/1), grayish brown (2.5Y 5/2),
quartz and light blue moonstone plagioclase
olive green (5GY 5/4), and black (N2.5),
are present, slightly decomposed, slightly
alternating gneissic and schistose texture,
disintegrated
thinly foliated, localized pyroxene (SOUND
77'-87' Partially open fractures with Fe
80
ROCK)
staining and pyrite mineralization
79' Fracture, dip 150
80.2', 80.7' Fracture, dip 250
85
84.5' Fracture, dip 25°
87'-97' Partially open fractures with pyrite
mineralization
88.5'-88.7' Vertical fracture
88.7'-90' Fracture, dip 300
90
92.2'-93' Vertical fracture
95
95'-95.4' Vertical fracture
95.5'-96.5' Fracture, dip 750, closed, quartz
mineralization
97.5'-97.8' Vertical fracture, partially open,
pyrite mineralization
11001

BORING NUMBER U5-8BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 5 OF 6
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373 PROJECT LOCATION Cliffside, NC
W Z
c
o
0
=
�W
F W
<nw
?�F ���
YO
❑
O
w
-1 0
Z J
-j D Q
-
o j
U W
0>
Y
DESCRIPTION
REMARKS
MONITORING
WELL
❑
dU
m0>
ORO
0
g�
UZ
L)
w
O
rY
cU) Z
ry
100
BIOTITE-QUARTZ-PLAGIOCLASE GNEISS,
strong to very strong, white (9N), light bluish
100.5'-100.7' Fracture, dip 251, partially
gray (5PB 7/1), grayish brown (2.5Y 5/2),
open, pyrite mineralization
olive green (5GY 5/4), and black (N2.5),
101'-101.5' Vertical fracture, partially open,
alternating gneissic and schistose texture,
pyrite mineralization
thinly foliated, localized pyroxene (SOUND
ROCK) (continued)
105
108.6-110.2' Fracture, dip 850, partially
open, pyrite mineralization
110
112'-112.5' Fracture, dip 300, partially open,
pyrite mineralization
115
117'-118' Vertical fracture, partially open,
pyrite mineralization
120
11251

BORING NUMBER U5-8BR
S. Church Street, Suite 900
Charlotte, 28202-2075
PAGE 6 OF 6
F)�440
Phone: [phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Cliffside Post -CSA Additional Assessment
PROJECT NUMBER 269373
PROJECT LOCATION Cliffside, NC
z
=
HW
�:H-n
Yw
pU'
�
Lu w
O Z J-
p Q
W
o>
(� W
0>
Q.
DESCRIPTION
REMARKS
MONITORING
WELL
w V
p
-j 0
aU
-j
000>
O
wO
Y
QO
Oz
v
W
Lu
O
(n Z
of
125
Boring terminated at 127', screened interval
set at 120.9'-125.9', monitoring well installed
`
on 2/2/16
Bottom of borehole at 127.0 feet.

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
IL
4:7'-97
1,lJF RT sl Nhm o `i)� N
(RON� a,£4� N ly u
/) E CDVE R. 4.
i
Photo 1 - U5-8BR: Box 1 of 5 Depth: 77.0'- 87.0' Date: 02/02/16
Ag __ -I'm%
C LIFPSInE hCAN '.' Ii4)�1
tax z ,r z
us -sap
RSD S�/
' ysost3
Photo 2 - U5-8BR: Box 2 of 5
Depth: 87.0'- 97.0' Date: 02/02/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
Photo 1 - U5-8BR: Box 1 of 5 Depth: 77.0'- 87.0' Date: 02/02/16
Ag __ -I'm%
C LIFPSInE hCAN '.' Ii4)�1
tax z ,r z
us -sap
RSD S�/
' ysost3
Photo 2 - U5-8BR: Box 2 of 5
Depth: 87.0'- 97.0' Date: 02/02/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
CC/F: S"k S7FIn n�, -
BOX-
US- s^„2
p
95'/
Photo 3 — U5-8BR: Box 3 of 5 Depth: 97.0'- 107.0' Date: 02/02/16
sck3"F
jasp ,.s'r
Vr- low
o.7,1/31:i..
ria _
Photo 4 — U5-8BR: Box 4 of 5
Depth: 107.0'- 117.0' Date: 02/02/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]
AW
Photo 3 — U5-8BR: Box 3 of 5 Depth: 97.0'- 107.0' Date: 02/02/16
sck3"F
jasp ,.s'r
Vr- low
o.7,1/31:i..
ria _
Photo 4 — U5-8BR: Box 4 of 5
Depth: 107.0'- 117.0' Date: 02/02/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Cliffside Steam Station - CSA Supplement 2 FN
A, Sample Photographs
Photo 5 — U5-8BR: Box 5 of 5 Depth: 117.0'- 127.0' Date: 02/02/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]