NC0004961_4_FINAL_CSA Supplement 2_Riverbend_Appendix A_20160826

BORING NUMBER BG-4S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 2
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 3/3/16 COMPLETED 3/3/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 7 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME 3/3/2016 3:45:00 PM 58.00 ft
NOTES 1 DATE/TIME ---
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(CL) SILTY CLAY, stiff, red (2.5YR 4/8), plastic,
Organic debris intermixed
moist, cohesive, (SOIL)
--------------------
(ML) CLAYEY SILT, medium light red (2.5YR
7/6) and very pale white (2.5Y 1/9), non -plastic,
dry, non -cohesive, (SOIL)
5
SD-1
82
10
Mn nodules present in last 2 feet S-2
15
SD-2
115
--------------------
(ML) SILT, medium, red (2.5YR 5/8),
non -plastic, moist, non -cohesive, (SOIL)
20
Mn nodules throughout S-3
25
SD-3
106
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(ML) SILT, stiff, very pale brown (10YR 8/3) and
Mn nodules residual laminated foliation and
light red (2.5YR 7/6), non -plastic, moist,
fragmented quartz
non -cohesive, (SAPROLITE)
30
Mn nodules becoming larger and staining
increasing
Color changes to yellowish brown (10YR 5/8) and
white (2.5Y 1/9)
35

BORING NUMBER BG-4S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 2 OF 2
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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(ML) SILT, stiff, very pale brown (10YR 8/3) and
light red (2.5YR 7/6), non -plastic, moist,
non -cohesive, (SAPROLITE) (continued)
40
Brown color decreases/changes to light olive gray
(5Y 6/2) and white (2.5Y 1/9)
45
SD-5
120
50
(ML) SILT, dense, light olive gray (5Y 6/2) and
white (2.5Y 1/9), non -plastic, moist,
non -cohesive, (SAPROLITE)
55
SD-6
120
Water present on 4 5/8 at -58' (3/3/16-15:45)
-
60
65
SD-6
115
:.'•
70
Bottom of borehole at 70.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — BG-4S: Sample S-1 Depth: 0' - 10.0' Date: 03/03/16
Photo 2 — BG-4S: Sample S-2 Depth: 10.0' - 20.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — BG-4S: Sample S-3 Depth: 20.0' - 30.0' Date: 03/03/16
Photo 4 — BG-4S: Sample S-4 Depth: 30.0' - 40.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 5 — BG-4S: Sample S-5 Depth: 40.0' - 50.0' Date: 03/03/16
Photo 6 — BG-4S: Sample S-6 Depth: 50.0' - 60.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 7 — BG-4S: Sample S-7 Depth: 60.0' - 70.0' Date: 03/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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BORING NUMBER BG-4D
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 Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 3/3/16 COMPLETED 4/12/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 9 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME --
NOTES DATE/TIME 4/12/2016 12:45:00 PM 53.50 ft
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REMARKS
MONITORINGW
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(CL) SILTY CLAY, stiff, red (2.5YR 4/8), plastic,
Lithology of BG-4S, logged 3/3/16 used for
moist, cohesive, (SOIL)
first 70 feet
5" hole for coring/well; 9" hole for 6" PVC
(ML) CLAYEY SILT, medium light red (2.5YR
Casing
7/6) with limited pale white (2.5Y 1/9),
Topsoil Present top 2'
non -plastic, dry, non -cohesive, (SOIL)
Rock RQD values est. based on core produced
by rotosonic method: however, rotosonic
5
SD-1
method greatly increased mechanical fractures
81
10
(ML) SILT WITH SAND, medium, red (2.5YR
Sand fine to coarse grained, poorly sorted,
7/6) and yellow (10yr 7/6), non -plastic, dry,
subangular
non -cohesive, (SOIL)
15
SD-2
115
Mn nodules present at 15'
--------------------
(ML) SILT, medium stiff, red (2.5YR 5/8),
non -plastic, dry, non -cohesive, (SOIL)
20
Gradational color change (20-25'). Changes
from Red (2.5 YR 5/8) to Light Red (2.5 YR
7/6) to very pale brown (10 YR 8/3)
25
SD-3
106
(ML) SILT, stiff, very pale brown (10YR 8/3) with
Mn nodules, residuum laminae foliation,
light red (2.5YR 7/6), medium plasticity, moist,
containing relict fragmented quartz
non -cohesive, (SAPROLITE)
ML above changes in color to Yellowish Brown
(10YR 5/8) and white (2.5YR 1/9), non -plastic,
moist, non -cohesive
30
Mn nodules, becoming much larger and
increase in staining (Mn)
35

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BORING NUMBER BG-4D
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 Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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— — — — — — — — — — — — — — — — — — — --
(ML) SILT WITH SAND, stiff, light olive gray (5Y
40
6/2), yellowish Brown (10YR 5/8), and white
(2.5Y 1/9), non -plastic, moist, non -cohesive,
(SAPROLITE)
Presence of sand and brown color decreased
45
SD-5
120
with depth and color changes to light olive gray
(5Y 6/2) and white (2.5Y 1/9) at 48'.
--------------------
(ML) SILT, stiff, light olive gray (5Y 6/2) and
white (2.5Y 1/9), non -plastic, moist,
50
non -cohesive, (SAPROLITE)
1
55
SD-6
120
Water present on tooling at 58' (3-3-16)
60
65
SD-7
115
S-8: First sample collected after return to BG-4
location on 4-5-16. Lithology of BG-4S used
70
for above

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BORING NUMBER BG-4D
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 Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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MONITORING
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(ML) SILT WITH SAND, medium stiff, light
Micaceous component present
yellowish brown (10YR 6/4), light olive gray (5Y
6/2) and white (2.5Y 1/9), non -plastic, moist,
SD-8
43
non -cohesive, (SAPROLITE)
75
(SW) SAND, dense, light yellowish brown (10YR
6/4), non -plastic, moist, non cohesive, (SOIL)—r
(ML) SILT WITH SAND, stiff, light yellowish
SD-9
brown (10YR 6/4), non -plastic, moist,
60
non -cohesive, (SOIL)
No structural saprolite characteristics present
80
Sand becomes coarser, angular and poorly
sorted with depth
SD-
85
10
109
(ML) SILT WITH SAND, stiff, light yellowish
Micaceous characteristics and structural
90
brown (10YR 6/4) and white (2.5Y 1/9),
non -plastic, dry, non -cohesive, (SAPROLITE)
laminae components return with saprolite
composition (sample very dry)
SD -
95
11
120
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(SW) SAND, dense, light yellowish brown (10YR
SP Sand, coarse, angular, poorly sorted
100
6/4) with white (2.5Y 1/9), non -plastic, moist,
(residual diorite); ml-residual diabase with Fe
non -cohesive, (SAPROLITE)
staining
(ML) SILT, stiff, greenish gray (GLAY 1, 6/56Y)
with yellow (2.5Y 7/6), non -plastic, moist,
L1O
SD-
non -cohesive, (SAPROLITE)
— -------------------
12
120

BORING NUMBER BG-4D
S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 4 OF 4
F),440
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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105
(SW) SAND, dense, light yellowish brown (10YR
Residual Dionte
6/4) with white (2.5Y 1/9), non -plastic, moist,
non -cohesive, (SAPROLITE) (continued)
--------------------
(ML) SILT, stiff, greenish gray (GLAY 1, 6/56Y)
with yellow (2.5Y 7/6), non -plastic, moist,
Residual Diabase
non -cohesive, (SAPROLITE)
110
--------------------
(SP) SAND, dense, light yellowish brown (10YR
6/4), non -plastic, moist, non -cohesive,
(SAPROLITE)
(ML) SILT, stiff, olive brown (2.5Y 4/4)
Mn staining and micaceous component
SD-
non -plastic, moist, non -cohesive, (SAPROLITE)
(113-115')
115
13
120
--------------------
(SP) SAND, dense, light yellowish brown (10YR
6/4), non -plastic, moist, non -cohesive,
(SAPROLITE)
--------------------
META -QUARTZ DIORITE, weak matrix, white
(8/1) and very dark gray (10 YR 3/1),
phenocrysts, porphyritic, phaneritic, massive
— — — — — — — — — — — — — — — — — — — --
120
META -QUARTZ DIORITE (same as above), with
metadiabase, very strong, very dark greenish
gray (GLAY 1 3/1), aphanitic, massive
SD-
>
14
0
Bottom of borehole @ 124'; PVC casing
125
installed to 124'
—
124-126.3': core primarily diabase but contains
METADIABASE very strong, dark greenish gray
diorite contact, contact at —800 contained
(GLAY 1 3/1), aphanitic, massive
within diabase
126.3-129.8': Core completely diabase
RC-1
78
130
--------------------
METADIABASE with META QUARTZ DIORITE
129.8-132': Core again contains diorite
contact. Core transitions from completely
— — — — — — — — — — — — — — — — — — — --
diabase (129.8')tocompletely diorite (131.7')
META -QUARTZ DIORITE
Fractures: 135': 100 open, no staining
Fractures: 137': 100 open, no staining
135
137.4-137.5': diabase intrusion
Fractures: 138.3': 100 open, no staining
RC-2
100
Fractures: 138.6-138.7': 200 open, no staining
Bottom of BG-4D = 139'
Bottom of borehole at 139.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — BG-4D: Sample S-8 Depth: 30.5' - 35.0' Date: 04/5/16
Photo 2 — BG-4D: Sample S-9 Depth: 74.0' - 79.0' Date: 04/5/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — BG-4D: Sample S-10 Depth: 79.0' - 89.0' Date: 04/5/16
Photo 4 — BG-4D: Sample S-11 Depth: 89.0' - 99.0' Date: 04/5/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 5 — BG-4D: Sample S-12 Depth: 99.0' - 109.0' Date: 04/5/16
Photo 6 — BG-4D: Sample S-13 Depth: 109.0' - 119.0' Date: 04/5/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 7 — BG-4D: Sample 14 Depth: 119.0' - 121.0'
Photo 8 — BG-4D: Sample S-14 Depth: 121.0' - 124.0'
A'
j x
Date: 04/5/16
ill"151% W-1
Date: 04/5/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
C-lyn STEAD, 5iG1 rNov
6AIP AssE5smc_NT
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Photo 9 — BG-4D: Box 1 of 2 Depth: 124.0' - 134.0' Date: 04/11 /16
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Photo 10 — BG-4D: Box 2of 2 Depth: 134.0' - 139.0' Date: 04/11/16 - 04/12/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER BG-5D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 3
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 2/23/16 COMPLETED 3/17/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 9 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME 3/29/2016 1:30:00 PM 29.50 ft
NOTES Southwest corner of property 1 DATE/TIME 3/17/2016 1:30:00 PM 65.00 ft
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(SP-SM) SILTY SAND, medium, brown (10YR
5/3), non -plastic, moist, non -cohesive, (SOIL)
Hole sizes: 9" 0 to 27'; 5" 27-109', 6" PVC
casing
5
SD-1
98
(SP-SM) SILTY SAND, medium, brown (10YR
Sand - coarse grained, poorly sorted,
5/3), non -plastic, moist, non -cohesive, (SOIL)
subangular to angular
--------------------
(CL) SILTY CLAY, medium, yellowish red (5Y
10
5/6), low to moderate plasticity, moist, cohesive,
(SOIL)
----------------------
(SM) SILTY SAND, medium, very pale brown
Sand - fine to medium grained, moderate
(10YR 7/3), non -plastic, moist, non -cohesive,
sorting, subangular
15
SD-2
112
(SOIL)
20
Mn Nodules and staining in saprolite (24-25'),
SD-3
36
bottom of S-3
25
--------------------
(ML) SANDY SILT, still, very pale brown (10YR
7/3) and very pale yellow (2.5Y /2), non -plastic,
Split-spoon/rock refusal at 25'
SD - 4
50/0"
01.
moist, non -cohesive, (SAPROLITE) —I
META -QUARTZ DIORITE, strong, white matrix
(8/N), dark greenish gray (56Y 5/1), phaneritic,
PVC casing installed to 27' (2-24-16)
RC-1
90
massive
Fracture Zone —90% from 25 to 30' includes
epidote mineralization and Fe oxidation
30
staining (Core box 1: 25-38')
Rock ROD values estimated based on core
RC - 2
61
35

BORING NUMBER BG-5D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 2 OF 3
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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REMARKS
MONITORING
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META -QUARTZ DIORITE, strong, white matrix
ro osonic method greatly increases mec anica
(8/N), dark greenish gray (56Y 5/1), phaneritic,
fractures
massive (continued)
Tight Fractures—38-39' bgs, dip angle of 70°
with epidote mineralization (Core box 2: 38-50',
40
RC-3
55
RC-3 and RC-4)
45
RC-4
86
Fracture —48-49', partially open fracture at 60'
with epidote and Fe staining
50
(Core Box 3: 50-60', RC-5 and RC-6)
RC-5
100
55
RC-6
98
60
Mechanical breaks throughout RC-7 and RC-8
due to sonic process (no fractures, natural or
RC-7
100
mineralization identified (Core Box 4: 60-68.3',
RC-7 and RC-8)
65
1
RC-8
94
(Core Box 5: 68.3-79.0', RC-9 and RC-1 0)
70

BORING NUMBER BG-5D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 3 OF 3
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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MONITORING
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100
META -QUARTZ DIORITE, strong, white matrix
RC-9
(8/N), dark greenish gray (56Y 5/1), phaneritic,
massive (continued)
75
META -QUARTZ DIORITE, strong, white matrix
Fracture, at 75' (20°), open with no staining or
RC-
67
(8/N), dark greenish gray (56Y 5/1), phaneritic,
mineralization
10
massive
Diabase Dike: Metadiabase, moderate to strong,
dark grayish green (56Y 4/2), aphanitic and
Diabase dike appears at 78-79' (-30% of core)
massive (see remark)
80
(Core Box 6: 79-89.0')
RC-
93
85
11
86-89': Open fracture zone
Partially open fracture with mineralization (89')
90
Mechanical breaks throughout RC-12 due to
sonic process
RC-
87
12
93-94': Partially open fracture (80°) with no
mineralization (Core Box 7: 89-94')
95
(Core Box 8: 94-104)
Very good water production zone encountered
during RC-13 (94-104). Best
fractures/production zone in zone (98-103').
i..
RC-
13
88
99-99.5': Open fracture (801), no
100
mineralization
102-104': Fracture zone, open and closed
(40°), Fe staining
Bottom of borehole at 104.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — BG-5D: Sample S-1 Depth: 0.0' - 10.0' Date: 02/23/16
Photo 2 — BG-5D: Sample S-2 Depth: 10.0' - 20.0' Date: 02/23/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — BG-5D: Sample S-3 Depth: 20.0' - 25.0' Date: 02/23/16
Photo 4 — BG-5D: Box 1 of 8 Depth: 25.0' - 38.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
1_Y✓�1N C3� v-si7 'F. ii g ��/ 14 %-
C}EYT.� 4- - 50.Cp
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Photo 5 — BG-5D: Box 2 of 8 Depth: 38.0' - 50.0' Date: 02/29/16
`ti}EROEr.SL'� pTEAVN �'(,CiT10W
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Photo 6 — BG-5D: Box 3 of 8
RUN 5 - 50-,.52
TO- 141. REC. 241z4 fd
"T47Ygt REG� 9/4 �i�
Depth: 50.0' - 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 Riverbend Steam Station - CSA Supplement II ���
Appendix A, Sample Photographs
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,oq-TA CP�p C'�SSESSM7E1`�
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ID p,T F-
.Iz— .4 nr
'1121 ` IDD
11 Y V }'S ��ry. i.O\0 • O - C90[]�J 1+
?can nji+ = fad%
Photo 7 — BG-5D: Box 4 of 8 Depth: 60.0' - 68.3' Date: 02/29/16
9VE.R8E.h4D STE.R rt SiF{T ION 1SUN 1 : L-43. 3
pTA ij Ri'StvS'1'11 £.idY fuo
6� S� TUB �VL RC /( n
- • A
Photo 8 — BG-5D: Box 5 of 8
Depth: 68.3' - 73.3' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
R n S-rr.RM 5--rA-T10N R RUN 9� L8
��P�FI '• p
0-
Photo 9 — BG-5D: Box 5 of 8 Depth: 73.3' - 79.0' Date: 02/29/16
Photo 10 — BG-5D: Box 6 of 8 Depth: 79.0' - 89.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 11 - BG-5D: Box 7 of 8 Depth: 89.0' - 94.0' Date: 02/29/16
RUN 13 `74- 104-
t I RCam!?far 4-7%to= G,`-A
`-
Photo 12 - BG-5D: Box 8 of 8 Depth: 94.0' - 104.0' Date: 02/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER BG-5BR
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 5
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 4/1/16 COMPLETED 4/4/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 9 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME 4/2/2016 88.00 ft
NOTES 1 DATE/TIME ---
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(SP-SM) SILTY SAND, medium brown (10YR
5/3), non -plastic, moist, non -cohesive, (SOIL)
PVC casing placed 2' below bottom of BG-5D
well screen (103'). Rock ROD values
estimated based on core provided by rotosonic
method. Method greatly increased mechanical
fractures
Sand- medium to coarse grained, poorly
sorted, subangular
5
SD-1
98
(SP-SM) SILTY SAND, medium dark brown
Sand - coarse grained, poorly sorted
(10YR 3/3), non -plastic, moist, non -cohesive,
subangular to angular
(SOIL)
10
— — — — — — — — — — — — — — — — — — — —
(CL) SILTY CLAY, medium yellowish red (5Y
5/6), low to moderate plasticity, moist, cohesive,
(SOIL)
(SM) SILTY SAND, medium, very pale brown
Sand - fine to medium grained, moderate
15
SD-2
(10YR 7/3), non -plastic, moist, non -cohesive,
sorting, subangular
97
(SOIL)
20
SD-3
50
25
--------------------
See BG-5D Log for Description to 104'
30
35

BORING NUMBER BG-5BR
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 2 OF 5
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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MONITORING
WELL
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35
See BG-5D Log for Description to 104'
(continued)
40
45
50
55
60
65
70

BORING NUMBER BG-5BR
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 3 OF 5
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
LLJ �
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WELL
❑
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See BG-5D Log for Description to 104'
(continued)
75
80
85
90
95
100
105

BORING NUMBER BG-5BR
S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 4 OF 5
F),440
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
LLJ �
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REMARKS
NION LL
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105
PVC Casing at 105'
core Box
META -QUARTZ DIORITE, strong, white matrix
(8/w), light bluish gray (GLAY 2 7/1 and 8/1)
with black (Glay 1 2.5 N), phaneritic, massive
Interval 108.7 to 114.0' contains orthoclase
feldspar, quartz, epidote, hornblende
Fracture 108.7-110' (200 to vertical) quartz and
110
RC-1
97
Mn filled
Fracture 111.8 to 114.0' (70-800) open
fracture with trace epidote on fracture surface
115
--------------------
Cross-cutting dike consists of fine grained
(core box 2: 114.5-124.5')
I orthoclase feldspar, quartz, and biotite (500) I
-------------------
Same as above
Fracture: 117', 500, open
120
RC-2
90
--------------------
Interval same as above 120-121.8'
Fracture: 119.5',35°,open
Fracture: 120.8', 60°, open
Fracture: 122.5', 701, open
125
(core box 3: 124.5-134.5)
Orthoclase feldspar, quartz, epidote, hornblende
Fracture: 126.5-130', 701, large open fracture,
along fracture zones from 126.5-130.0'
quartz mineralization, Mn staining
127-127.5' (70-750), closed, quartz filled
fracture (Mn staining)
130
RC-3
93
____________________
METADIABASE, dark greenish gray, (GLAY 1
56Y 4/1), aphanitic, massive with quartz and
unakite filled fractures (diabase pyroxene rich)
Diabase dike contact with diorite forming
unakite (unakite fractures 70-900)
(Core Box 4: 134.5-144.0')
135
134.5': closed, unakite filled, 300
135.5': closed, fracture with pyrite and unakite,
400
136-139.5': 55-750, group of open fractures
RC-4
82
with quartz and unakite mineralization
140
--------------------
META -QUARTZ DIORITE same as above

BORING NUMBER BG-5BR
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
PAGE 5 OF 5
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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REMARKS
RING
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140
META -QUARTZ DIORITE same as above
(continued)
141-143.5', vertical open fracture
RC-5
75
(Core Box 5: 144.0-154.0')
145
145.5', 500, partially open fracture with quartz
filling
147.5', 650, open with unakite mineralization
RC-6
61
150
(core box 6: 154.0-164.0')
155
Fracture: 154.5', 80°, unakite filled
Fracture: 156.5', 650, partially filled with
epidote and pyrite
RC-7
100
160
Fracture: 162.0% 750, partially filled with
epidote
Bottom of borehole at 164.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — BG-5BR: Sample S-1 Depth: 5.0' - 10.0' Date: 02/25/16
Photo 2 — BG-5BR: Sample S-2 Depth: 10.0' - 20.0' Date: 02/25/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — BG-5BR: Sample S-3 Depth: 20.0' - 25.0' Date: 02/25/16
4,)jt.K _uu - r-E.Arn, --)-r,cl-r tc
CAA GA'P Assn S sv,E*s�F
B©e "". BCC-58fit t�
Photo 4 — BG-5BR: Box 1 of 6
Depth: 105.5' - 114.5'
Date: 04/01/16 - 04/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
i rvtirer� n© 2>-rSAm --3-rar-r-rw4
p A's"q � a� A�scssm Ers-r
S3osz au[5 � 6+j- 5BR
2>ax z OE-6
RUt4 2: 1 14. 5- I Z4. 5
Q U zo = Gz f
Photo 5 — BG-5BR: Box 2 of 6 Depth: 114.5' - 124.5'
7„ 6� Asnossw�.wr �
5]a- A GAV RsS�sSwt r�C
BoRtiNc i3t • arsR
�Prx I2-4 5 - 134.5
Photo 6 — BG-5BR: Box 3 of 6 Depth: 124.5' - 134.5'
Date: 04/01/16 - 04/03/16
RUN 6 iz4-5 - 1:54.
To-rAL Riec. III/1ZO
,1ZQ,D' 4L/za-38%
Date: 04/01/16 - 04/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
r
.57 �a� 5-rsrr, a�u
a. A�ri6ss mE.ur
- SG•fiSrt
cos s -� d4.6
µ 134.4, - 1 r4.4
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ktyhi 4- 134.5- 140.
72D-FAL 9CC. 'Sr�GG' 82F
RCA p: 3i && • 48;�.
Rom 6 74,C7 )4-1
TOTAL I4£c '%48 =-s%•
Photo 7 — BG-5BR: Box 4 of 6 Depth: 134.5' - 144.0' Date: 04/01/16 - 04/03/16
1~L1�1fC�/'�C'{'AT7 �I=FiM-3Tr�Tlfj/'�J
D+�`t L1 tJI�Q i�hSSCS°S�'�'lrc nl'f'
byµ. i4-4�-
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J'RuN 1p 144--i
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Mgr++: J n4 - 11�4
Photo 8 — BG-5BR: Box 5 of 6 Depth: 144.0' - 154.0' Date: 04/01/16 - 04/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 9 — BG-5BR: Box 6 of 6 Depth: 154.0' - 164.0' Date: 04/01/16 - 04/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-2S-A
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 2
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 2/6/16 COMPLETED 2/6/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 7 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME 2/6/2016 11:20:00 AM 45.50 ft
NOTES Location at toe of dam 1 DATE/TIME ---
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(CL) CLAY, stiff, yellowish red (5Y 5/6), low
Appro,775577y=opsoil with organic e ris
plasticity, moist, cohesive, (SOIL)
Potentially compacted material associated with
construction of dam
5
SD-1
92
10
Density of material decreasing with depth
15
SD-2
100
same as above
20
--------------------
(ML) SILT, medium red (2.5YR 4/6), and
brownish yellow (10YR 6/6), non -plastic, moist,
25
SD-3
98
cohesive, (SOIL)
30
(ML) SANDY SILT, medium red (2.5YR 4/6) and
brownish yellow (10YR 6/6), medium plasticity,
Mn Nodules & Mn staining present (foliation &
moist, cohesive, (SAPROLITE)
structural deformation present)
Sand, fine to medium, well rounded
Compacted fill material associated with dam
decreasing
35

BORING NUMBER GWA-2S-A
440 S. Church Street,
Charlotte, NC 28202-2075
Suite 900
PAGE 2 OF 2
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375
PROJECT LOCATION Gaston, NC
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MONITORINGW
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35
(ML) SANDY SILT, medium red (2.5YR 4/6) and
brownish yellow (10YR 6/6), medium plasticity,
moist, cohesive, (SAPROLITE) (continued)
40
Red (2.5YR 416), foliation disappears, moisture
Change in color at -41'
increases
Moisture causes material softness
45
SD-5
120
Water notice on rods at-45-46'
y
50
(ML) SILT, stiff, olive gray (5Y 4/2), red (2.5YR
4/6), and yellowish brown (10YR 4/4),
non -plastic, moist, non -cohesive (SAPROLITE)
(ML) SILT WITH SAND, medium, red (2.5YR
4/6), and brownish yellow (10YR 6/6),
55
SD-6
non -plastic, moist, non -cohesive (SAPROLITE)
Mn nodules and foliation
60
Bottom of borehole at 60.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — GWA-2SA: Sample S-1 Depth: 0.0' - 10.0' Date: 02/05/16
Photo 2 — GWA-2SA: Sample S-2 Depth: 10.0' - 20.0' Date: 02/06/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — GWA-2SA: Sample S-3 Depth: 20.0' - 30.0' Date: 02/06/16
Photo 4 — GWA-2SA: Sample S-4 Depth: 30.0' - 40.0' Date: 02/06/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 5 — GWA-2SA: Sample S-5 Depth: 40.0' - 50.0' Date: 02/06/16
Photo 6 — GWA-2SA: Sample S-6 Depth: 50.0' - 60.0' Date: 02/06/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-11 S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 1
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 2/3/16 COMPLETED 2/4/16 GROUND ELEVATION TBD HOLE SIZE(S) 7 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY ! DATE/TIME 2/4/2016 8:10:00 AM 0.00 ft
NOTES Adjacent to Catawba River 1 DATE/TIME ---
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DESCRIPTION
REMARKS
MONITORING
WELL
W
Q
dU
m0>
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g0
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0
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0
See GWA-11 D for Lithology
Boring advanced for purpose of installing
monitoring well
5
10
15
20
25
30
Bottom of borehole at 32.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — GWA-11 S: Sample S-1 Depth: 0.0' - 10.0' Date: 02/03/16
Photo 2 — GWA-11 S: Sample S-2 Depth: 10.0' - 20.0' Date: 02/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — GWA-11 S: Sample S-3 Depth: 20.0' - 30.0' Date: 02/03/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-11 D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 4
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 1/31/16 COMPLETED 2/20/16 GROUND ELEVATION TBD HOLE SIZE(S) 5, 7, 9, 11 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
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DESCRIPTION
REMARKS
MONITORING
p
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m0>00
E0
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g-�
UZ
w
w
0
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< ZO
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Lu
0
(SM) SILTY SAND, light yellowish brown (10YR
6/4) and red (2.5YR 4/8), non -plastic, moist,
Rotosonic collection of 10' core samples and
cohesive (SOIL)
core barrel samples
5
SD - 1
114
--------------------
(CL) CLAY WITH SAND, stiff, red (2.5YR 4/8)
and light yellowish brown (10YR 6/4), medium
plasticity, moist, cohesive (SOIL)
10
15
SD-2
120
(CL) CLAY WITH SAND, stiff, olive gray (5Y
Zone of black discoloration associated with
5/2) and black (2.5/1), low plasticity, moist,
wood debris (possible burning)
cohesive (SOIL)
No residual ash identified (Zone approximately
2' at 17-19')
20
19-27': same as S-17
25
SD-3
120
--------------------
(ML) SILT WITH SAND, medium light olive gray
(5Y 6/2) with brownish yellow (10YR 6/6), and
white (N9), non -plastic, moist, non -cohesive,
contains medium to coarse grained sand,
30
micaceous (SAPROLITE)
35

BORING NUMBER GWA-11 D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 2 OF 4
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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>
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REMARKS
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p
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35
(ML) SILT WITH SAND, medium light olive gray
(5Y 6/2) with brownish yellow (10YR 6/6), and
white (N9), non -plastic, moist, non -cohesive,
contains medium to coarse grained sand,
micaceous (SAPROLITE) (continued)
40
same as above
Density increasing quartz fragments present
45
SD-5
120
50
55
SD-6
92
Driller indicates that hard material hit at —59'
60
Sub to core barrel breaks on 50-70' run. Barrel
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
reaches 70' and full of material. Used material
(SW-SM) SAND WITH SILT AND GRAVEL,
from core barrel to describe Iithology from
very dense, very pale (10YR 7/4), non -plastic,
60-70'.
moist, non -cohesive, gravel (WEATHERED
ROCK)
65
AU-1
120
70

BORING NUMBER GWA-11 D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 3 OF 4
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
LL j
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DESCRIPTION
REMARKS
MONITORING
p
0_0
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a'0
0
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af
of
70
(SW-SM) SAND WITH SILT AND GRAVEL,
very dense, very pale (10YR 7/4), non -plastic,
moist, non -cohesive, gravel (WEATHERED
ROCK) (continued)
75
Unable to recover material from 80-82 (driller
80
FAU- 2
using core sampler)
0
85
--------------------
(SW-SM) SAND WITH SILT AND GRAVEL,
SS - 1
50
0
very dense, greenish gray (5G 5/1), non -plastic,
moist, non -cohesive (WEATHERED ROCK)
90
(GM) GRAVEL WITH SAND AND SILT, very
L
50
0
dense, greenish gray (5G 5/1), non -plastic,
moist, non -cohesive (WEATHERED ROCK)
META -QUARTZ DIORITE, strong to very strong,
Contact between saprolite and weathered rock
white matrix (8N) with very dark greenish gray
estimated
(5G 3/1), phenocrysts, coarse grained,
non -foliated, massive
Bottom of casing at 94'
95
Core fragmented due to rotosonic
100
85
Core completely fragmented due to rotosonic
process
105

440 S. Church Street, Suite 900
F)I Charlotte, NC 2875
Phone:[phone]
6700
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NUMBER 269375
BORING NUMBER GWA-11 D
PAGE 4OF4
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston. NC
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W
L
MEN
META -QUARTZ DIORITE, strong to very strong,
white matrix (8N) with very dark greenish gray
(5G 3/1), phenocrysts, coarse grained,
100 non -foliated, massive (continued)
sl 1 1 92
Bottom of borehole at 115.0 feet.
Mineralization - potassium feldspar present
from—113-115

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 1 — GWA-11D: Sample S-1 Depth: 0.0' - 10.0' Date: 01/31/16
Photo 2 — GWA-11 D: Sample S-2 Depth: 10.0' - 20.0' Date: 01 /31 /16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
Photo 3 — GWA-11 D: Sample S-3
Depth: 20.0' - 30.0'
Photo 4 — GWA-11 D: Sample S-4 Depth: 30.0' - 40.0'
Date: 01 /31 /16
Date: 01 /31 /16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 5 — GWA-11D: Sample S-5 Depth: 40.0' - 50.0' Date: 01/31/16
Photo 6 — GWA-11 D: Sample S-6 Depth: 50.0' - 59.0' Date: 02/01 /16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 7 — GWA-11 D: Sample S-7/C-1 Depth: 60.0' - 70.0' Date: 02/01 /16
S-ITE
E, 111EQssNa
BL RzNG C + 1- %tv
DEPTH
RECOVERY
o• 2 AN
teas
s11
DATE
� . z0 -LI J (P
Photo 8 — GWA-11 D: Sample SS-1 Depth: 85.0' - 87.0' Date: 02/02/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
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Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 9 — GWA-11 D: Sample C-3 Depth: 90.0' - 94.0' Date: 02/04/16
Photo 10 — GWA-11 D: Box 1 of 2
Z 'C) ` Ito
Depth: 95.0' - 105.0' Date: 02/20/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
UN z 1C35 - 110
-TOTALRq(t) F2Y:/C)O,
ta.Qp: 07.
R u N.=
7-6-A
RQ� Q
Photo 11 — GWA-11 D: Box 2 of 2 Depth: 105.0' - 115.0' Date: 02/20/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-12S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 1
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 1/30/16 COMPLETED 1/30/16 GROUND ELEVATION TBD HOLE SIZE(S) 7 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME 1/30/2016 12:35:00 PM 19.80 ft
NOTES Former coal pile location 1 DATE/TIME ---
LLI �
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DESCRIPTION
REMARKS
MONITORING
WELL
W
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g0
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W
0
O
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0
0
See GWA-12D for Lithology
Boring advanced for purpose of well
installation
5
10
15
20
25
30
Bottom of borehole at 32.0 feet.

BORING NUMBER GWA-12D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 6
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 1/19/16 COMPLETED 1/31/16 GROUND ELEVATION TBD HOLE SIZE(S) 7, 9 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME ---
NOTES DATE/TIME ---
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DESCRIPTION
REMARKS
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p
_j
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m0>00
o'O
y
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g-�
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w
w
O
0
(ML) SILT WITH SAND, medium brown (10YR
5/3) with red (1OR 5/6), non -plastic, moist,
Rotosonic provides 4 5/8" OD, —3" sample
non -cohesive, fine to medium grained (FILL)
(10')
5
SD-1
120
10
— — — — — — — — — — — — — — — — — — — —
(ML) SILT, medium, light grayish olive (10Y/6),
non -plastic, moist, cohesive, very fine grained
(SOIL)
15
SD-2
115
20
--------------------
(ML) SILT, medium, light yellowish brown (10YR
6/4), non -plastic, moist, cohesive (SOIL)
25
SD-3
101
(SM) SILTY SAND, dense, gray (5Y 6/1),
Micaceous constituents
30
mottled white (9.5N), non -plastic, moist,
cohesive (SAPROLITE)
35

BORING NUMBER GWA-12D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 2 OF 6
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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35
(SM) SILTY SAND, dense, gray (5Y 6/1),
mottled white (9.5N), non -plastic, moist,
cohesive (SAPROLITE) (continued)
40
45
SD-5
108
50
Material becoming harder with depth
55
SD-6
115
60
65
SD-7
106
70

BORING NUMBER GWA-12D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 3 OF 6
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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MONITORING
0
0-0
m0�U)o
a'0
0
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70
(SM) SILTY SAND, dense, gray (5Y 6/1),
mottled white (9.5N), non -plastic, moist,
cohesive (SAPROLITE) (continued)
--------------------
(SW-SM) SAND WITH SILT, very dense, white
(N9), mottled olive (5Y 5/3), non -plastic, moist,
non -cohesive, quartz fragments (WEATHERED
ROCK)
75
SD-8
102
80
(SM) SILTY SAND, light brownish gray (2.5Y
Split Spoon Sample (SS-1) collected at 85' to
6/2), with white (10YR 41), very dark gray
test potential refusal (driller indicates potential
(7.5YR 3/1), non -plastic, wet, non -cohesive
rock present)
(SAPROLITE)
85
SS-1
50/2"
2
Displacement core used from 85-90'
90
Collect SS-2 to check for potential rock again
SS-2
(saprolite very tight)
95
(SW) SAND, medium dense, white (2.5Y 8/1),
100
SS-3
50/0"
0
non -plastic, moist, non -cohesive, micaceous,
medium to coarse grained (SAPROLITE)
105

BORING NUMBER GWA-12D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 4 OF 6
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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REMARKS
MONITORING
p
0_0
m0�U)0
a'0
0
g-
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w
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af
of
105
(SW) SAND, medium dense, white (2.5Y 8/1),
Hotosonic core barrel used to try and collect
non -plastic, moist, non -cohesive, micaceous,
material; however flows out at surface - SW
medium to coarse grained (SAPROLITE)
sand
(continued)
110
META -QUARTZ DIORITE, strong to very strong,
Driller uses core barrel to obtain core from
115
120
white matrix (8N) and very dark greenish gray
122-123'
(5GY 3/1), phenocrysts, coarse grained,
non -foliated, massive
125
Bottom of 6" casing at 125'
---------------------
(SW-SM) SAND WITH SILT, very dense, white
Core through lens of quartz diorite, —34' thick
(N9), mottled olive (5Y 5/3), non -plastic, moist,
RC - 1
non -cohesive, quartz fragments (WEATHERED
ROCK)
130
Description from cuttings, no sample obtained
from core barrel
135
RC-2
i ..
140

BORING NUMBER GWA-12D
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 Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
W j
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lA W
�ZJ
i
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DESCRIPTION
REMARKS
MO WELLING
UZ
W
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<Z
w
of
of
O
W
140
(SW-SM) SAND WITH SILT, very dense, white
(N9), mottled olive (5Y 5/3), non -plastic, moist,
non -cohesive, quartz fragments (WEATHERED
ROCK) (continued)
No material staying in core barrel
145
RC-3
150
155
RC-4
160
165
RC-5
170
--------------------
META-QUARTZ DIORITE, moderate to strong,
dark greenish gray (5GY 4/1), aphanitic,
massive, irregular veins of calcite
175

440 S. Church Street, Suite 900
Charlotte, NC2802-2075
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NUMBER 269375
BORING NUMBER GWA-12D
PAGE 6OF6
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston. NC
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DESCRIPTION
p
m0>
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w
W
U
0
<0
175
META -QUARTZ DIORITE, moderate to strong,
-
dark greenish gray (5GY 4/1), aphanitic,
-
massive, irregular veins of calcite (continued)
--------------------
META -QUARTZ DIORITE, strong to very strong,
-
white matrix (8N) and very dark greenish gray
(5GY 3/1), phenocrysts, coarse grained,
-
non -foliated, massive
180
a
c�
z
z
w
Cn
Cn
w
IL
a 185
a
Nu -
a
0
0
z
w
m
w
M
190
Bottom of borehole at 190.0 feet.
REMARKS
WELL

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
SITE
R-eASeA-T
BORING
ez'aA-17-r>
SAMPLr IU
c'-= k-
DEFTH
lZZ- IZ3
RECOVEW O. i �
eiol1S
NPt
PATE
Photo 1 - GWA-12D: Sample C-1 Depth: 122.0' - 123.0' Date: 01/27/16
71) a Pss-'-s'ns v-t FN-r
Photo 2 - GWA-12D: Box1 of 1 Depth: 170.0' - 180.0' Date: 01/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
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Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
'I?,-iWN : (17-0-1am F-T-)-
Photo 3 — GWA-12D: Box1 of 1 Depth: 170.0' - 180.0' Date: 01/29/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-13S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 2
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 4/28/16 COMPLETED 4/28/16 GROUND ELEVATION TBD HOLE SIZE(S) 6, 10 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY T. Campbell CHECKED BY DATE/TIME 4/28/2016 50.00 ft
NOTES 1 DATE/TIME 4/29/2016 11:15:00 AM 49.80 ft
LL j
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C
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} fY
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>
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ww
ui 0p
zj Q
0 >
p >
DESCRIPTION
REMARKS
MONITORING
p
_j
aU
_,
m0>00
E0
Y
U
g-�
UZ
w
w
O
�z
of
0
_TopsoilW-GC___
(G) GRAVEL WITH CLAY AND SAND
yellowish red (5YR 5/6), moist, low plasticity,
I_c_oh_esive_(A_LL_UVIU_M) _--------�
(ML) SILT WITH SAND, red (1 OR 5/8) and
SD-1
84
yellow (10YR 7/6), dry, non -plastic,
non -cohesive, with fine to coarse angular sand
5
(SOIL)
--------------------
(ML) SILT WITH SAND, light red (2.5YR 6/6)
and yellow (10YR 8/6), dry, non -plastic,
non -cohesive, with fine to coarse sand,
phaneritic (SAPROLITE)
10
SD-2
120
15
20
SD-3
120
25
--------------------
(ML) SILT, red (2.5YR 4/6) to red (1 OR 4/4), dry
to moist, non -plastic, non -cohesive
(SAPROLITE)
30
SD-4
120
35

BORING NUMBER GWA-13S
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 Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
W j
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o
0
_
�W
lA W
�ZJ
�Uw
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p
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LU v
d 0
m 0>
O
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DESCRIPTION
REMARKS
MO WE RING
g
Uz
U
cQ Z
w
W
O
35
(ML) SILT, red (2.5YR 4/6) to red (1OR 4/4), dry
to moist, non -plastic, non -cohesive
(SAPROLITE)
40
(ML) SILT WITH SAND, red (2.5YR 5/8), yellow
Frequent relic structure and Mn nodules/filling
SD-5
120
(10YR 8/6), and white (10YR 8/1) and black
(10YR 2.5/1), dry, non -plastic, non -cohesive
(SAPROLITE)
45
Water level —50'; measured during drilling and
-
50
seen on rods
SD-6
120
-- -------------------
(ML) SILT WITH SAND, grayish brown (10YR
5/2), yellow (10YR 8/6), and white (N 9.5),
55
moist, non -plastic, non -cohesive (SAPROLITE)
60
SD-7
60
Bottom of borehole at 62.0 feet.

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
zwt 27CNb
- (GWA- l35
S�FTyi
IOOi:
gp..l 2Q,7AP4
ari
Photo 1 — GWA-13S: Sample S-1
Photo 2 — GWA-13S: Sample S-2
Depth: 0.0' - 7.0'
Depth: 7.0' - 17.0'
Date: 04/28/16
Date: 04/28/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 3 — GWA-13S: Sample S-3 Depth: 17.0' - 27.0' Date: 04/28/16
Photo 4 — GWA-13S: Sample S-4 Depth: 27.0' - 37.0' Date: 04/28/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 5 — GWA-13S: Sample S-5
Depth: 37.0' - 47.0'
Photo 6 — GWA-13S: Sample S-6 Depth: 47.0' - 57.0'
Date: 04/28/16
Date: 04/28/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Supplement II ��
Appendix A, Sample Photographs
Photo 7 — GWA-13S: Sample S-7 Depth: 57.0' - 63.0' Date: 04/28/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-13D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 9
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 3/18/16 COMPLETED 4/29/16 GROUND ELEVATION TBD HOLE SIZE(S) 6, 10 inches
DRILLING CONTRACTOR Cascade Drilling L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY T. Campbell CHECKED BY DATE/TIME 4/29/2016 11:35:00 AM 51.60 ft
NOTES 1 DATE/TIME 3/23/2016 8:00:00 AM 52.50 ft
LL Z
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C
o
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ui 0p
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p >
DESCRIPTION
REMARKS
MONITORING
p
_j
aU
_,
m0>00
E0
Y
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g-�
<ZO
UZ
w
w
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0
Topsoil_________________
casing, 5" well
(GW-GC) GRAVEL WITH CLAY AND SAND
hol
hole sizes: 10" 0 10'; 6" 10 160'
yellowish red (5YR 5/6), moist, large to small
rounded gravel, fine to coarse sand, fines low
plasticity, cohesive (ALLUVIUM) — j
— -- --- ---- ----
(ML) SILT WITH SAND, red (1 OR 5/8) and
yellow (10YR 7/6), dry, non -plastic,
5
SD - 1
108
non -cohesive, with fine to coarse angular sand
(SOIL)
--------------------
(ML) SILT WITH SAND, light red (2.5YR 6/6)
and yellow (10YR 8/6), dry, non -plastic,
10
non -cohesive, with fine to coarse sand,
phaneritic (SOIL)
SD-2
120
15
20
SD-3
120
25
(ML) SILT, dark red (1 OR 3/6) and dusky red (5R
26-36.0': relic fractures common with Fe and
3/2), dry, non -plastic, non -cohesive, aphanitic,
Mn filling (shear zone)
blocky (SAPROLITE)
30
SD-4
120
35

BORING NUMBER GWA-13D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 9
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
W j
c
o
0
2
�W
rA W
�ZJ
i
(YjWCY
p
Wp v
d 0
m 0>
O
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DESCRIPTION
REMARKS
MONITORING
g
UZ
w
U
O
cQ Z
W
35
-- -------------------
(ML) SILT, red (2.5YR 4/6) to weak red (1OR
4/4), dry to moist, non -plastic, non -cohesive,
aphanitic, massive (SAPROLITE)
40
(GW-GM) GRAVEL WITH SILT, white (NG) and
41.0-43.0': Aplite dike, mylonitic in part
yellowish brown (10YR 5/4), dry, gravel -size
quartz fragments with silt
I (SAPROLITE/WEATHERED ROCK)— — — —
43.0-53.0': Frequent relict fractures with Mn
SD-5
(ML) SILT WITH SAND, red (2.5YR 5/8), yellow
filling
45
120
(10YR 816), white (10YR 8/1), and black (10YR
2.5/1), dry, non -plastic, non -cohesive, with fine
to coarse sand, (SAPROLITE)
GRADATIONAL CONTACT
50
Water level 50' bgs measured during drilling,
3/24/16 (hole to 143.0), water level 52.5' bgs,
measured during drilling 3/23/16 (hole to 167')
1
-- -------------------
(ML) SILT WITH SAND, grayish brown (10YR
SD-6
120
5/2), yellow (10YR 8/6), and white (N 9.5),
55
moist, non -plastic, non -cohesive, weathered
feldspar, micaceous with pyrite, phaneritic
(SAPROLITE)
68.5-69.0': (ML) SILT, reddish yellow (2.5YR 6/6),
dry, non -plastic, non -cohesive, aphanitic
(SAPROLITE)
60
SD-7
120
65
68.5-69.0': frequent relict fractures with Mn
filling
70

0-
q
F_
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w
w
V)
IL
c�
a
0
BORING NUMBER GWA-13D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 9
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
W j
c
o
0
_
�w
lA W
�ZJ
i
UW
p
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wp v
d 0
m 0>
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DESCRIPTION
REMARKS
MONITORING
UZ
w
U
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<Z
W
70
SD-8
120
75
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(ML) SILT WITH SAND, grayish brown (10YR
75-85.0': occasional Mn-filled relict fractures
5/2) and white (N 9.5) with zones of yellow
(10YR 8/6), moist, non -plastic, non -cohesive,
weathered feldspar with pyrite and mica,
phaneritic (SAPROLITE)
80
SD-9
120
85
(ML) SILT, light yellowish brown (2.5YR 6/3),
85-95.0': Frequent relict fractures with Fe, Mn
moist, non -plastic, non -cohesive, aphanitic
filling
(SAPROLITE)
90
(ML) SILT WITH SAND, grayish brown (10YR
5/2), white (N 9.5) and yellow (10YR 8/6),
moist, non -plastic, non -cohesive, weathered
feldspar with mica, some pyrite, phaneritic
(SAPROLITE)
SD-
(SM) silty Sand as above except more granular
0
110
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(SM) SILTY SAND, light brownish gray (1 OR
100-124.0': Weathered Meta -quartz diorite
ISJ'D
6/2) and white (N 9.5), some yellowish brown
(10YR 5/6), dry, fine to coarse sand and
granule -size weathered feldspar and quartz,
with mica, some pyrite, fines, non -plastic,
non -cohesive, phaneritic (SAPROLITE)
120

BORING NUMBER GWA-13D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 9
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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DESCRIPTION
REMARKS
MONITORING
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105
(SM) SILTY SAND, light brownish gray (1 OR
6/2) and white (N 9.5), some yellowish brown
(10YR 5/6), dry, fine to coarse sand and
granule -size weathered feldspar and quartz,
with mica, some pyrite, fines, non -plastic,
non -cohesive, phaneritic (SAPROLITE)
(continued)
110
(ML) SILT, olive gray (5YR 4/2), dry, non -plastic,
110-110.0': weathered meta-diabase
non -cohesive, aphanitic with —1 mm feldspar
phenocrysts
116.0-116.5' (ML) silt, same as 110-111.0'
(SAPROLITE)
SD-
115
12
120
116-116.5': Weathered meta-diabase
120
--------------------
(SM) SILTY SAND, white (N 9.5) and light
brownish gray (10YR 6/2), dry, fine to medium
SD-
13
60
grained weathered feldspar and quartz, fines
non -plastic, non -cohesive, phaneritic
(SAPROLITE)
(SW-SM) SAND WITH SILT, olive brown (2.5Y
124-127.0': weathered meta diabase
125
4/3), moist, low plasticity, cohesive, aphanitic,
with 1 mm feldspar phenocrysts, indistinct
SD-
sub -horizontal foliation (SAPROLITE)
14
60
-- — — — — — ------
( —SILTY SAND, white (N 9.5) and light
127-153.0': Weathered meta -quartz diorite
brownish gray (10YR 6/2), dry, fine to medium
with laminae of weathered meta-diabase
grained weathered feldspar and quartz, fines
non -plastic, non -cohesive, phaneritic with
130
laminae of silt, olive gray (5Y 4/2), non -plastic,
non -cohesive aphanitic (SAPROLITE)
SD -
15
48
SD -
135
16
72
140

BORING NUMBER GWA-13D
S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 5 OF 9
F),440
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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DESCRIPTION
REMARKS
NION LL
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(SM) SILTY SAND, white (N 9.5) and light
SD-
48
brownish gray (10YR 6/2), dry, fine to medium
17
grained weathered feldspar and quartz, fines
non -plastic, non -cohesive, phaneritic with
laminae of silt, olive gray (5Y 4/2), non -plastic,
non -cohesive aphanitic (SAPROLITE)
(continued)
145
SD-
>
18
0
150
-- -------------------
(ML) SANDY SILT, as above except less
SD -
19
48
granular
(SW-SM) SAND WITH SILT, olive (5Y 4/3),
153-154.0': weathered meta-diabase
moist, fine to coarse weathered rock fragments,
I
154-163.0': weathered meta -quartz diorite
155
SD -
fines low plasticity, cohesive, aphanitic, with 1 I
I
mm feldspar phenocrysts (SAPROLITE)— — —
20
60
(SM) SILTY SAND, white (N 9.5) and brownish
yellow (10YR 6/6), dry, fine to coarse sand and
granule -size weathered feldspar and quartz,
fines non -plastic, non -cohesive, phaneritic
(SAPROLITE)
160
SD -
21
36
(SM) SILTY SAND, as above except light
163.0': weathered meta -quartz diorite with
SD -
brownish gray (10YR 6/2) and White (N9.5)
laminae of weathered meta-diabase
165
22
72
with laminae of silt, olive gray (5Y 4/2), dry
non -plastic, non -cohesive, aphanitic
(SAPROLITE)
(CL) LEAN CLAY WITH SAND, olive (5Y 5/3
Meta -diorite rock fragments and plagioclase
and 5/4), light grayish olive (10Y 6/2), and
feldspar and quartz grains are common, relict
grayish olive (10Y 5/2); low plasticity, wet,
phenocrysts present, SAPROLITE
cohesive, some silt and very fine to coarse
170
sand, trace fine gravel
SD-
23
120
----------------
(GP) POORLY GRADED GRAVEL WITH
Meta -diorite rock fragments and plagioclase
SAND, light gray (5Y 7/2) and light olive gray
feldspar and quartz grains are common
(5Y 6/2), non -plastic, dry, non -cohesive
----------------
Plagioclase, quartz and muscovite grains are
175

BORING NUMBER GWA-13D
S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 6 OF 9
F),440
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
LLJ �
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DESCRIPTION
REMARKS
NION LL
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175
(CL) GRAVELLY LEAN CLAY WITH SAND,
pale olive (5Y 6/3), pale yellow (5Y 8/2), very
pale brown (white page 10YR 8/2) and light
bluish gray (GLEY2 8/1), low plasticity, moist,
cohesive, some very fine to coarse sand and
I some fine gravel (continued) — — — — — — J
Same as above except: change in color at
Same as above except relict foliation planes
180
182-185' to mottled dark brown (10YR 3/3), light
yellowish brown (10YR 6/4), brownish yellow
and phenocrysts present, SAPROLITE
(10YR 6/6 and 6/8), reddish brown (5YR 4/4),
light greenish gray (GLEY2 7/1), and bluish
2
120
black (GLEY2 2.5/1)
185
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(GP) POORLY GRADED GRAVEL WITH
relict phenocrysts present, SAPROLITE
SAND, light olive brown (2.5Y 5/3 and 5/4),
very pale brown (10YR 8/2), white (white page
N9.5), and yellowish brown (10YR 5/4),
Meta -diorite rock fragments and plagioclase
non -plastic, dry, non -cohesive, some very fine t4
feldspar and quartz grains are common, relict
l coarse sand, few silt — — — — — — — — — — j
phenocrysts present, SAPROLITE
(CL) GRAVELLY LEAN CLAY WITH SAND,
190
pale olive (5Y 6/3), yellowish brown (10YR 5/8),
gray (10YR 6/1) and white (10YR 8/1), low
plasticity, wet, cohesive, some silt, some fine to
SD -
coarse sand, little fine gravel
25
120
--------------------
(GP) POORLY GRADED GRAVEL WITH
SAND, light olive brown (2.5Y 5/3 and 5/4),
195
very pale brown (10YR 8/2), white (white page
N9.5), and yellowish brown (10YR 5/4),
non -plastic, dry, non -cohesive, some very fine to
coarse sand, few silt
--------------------
(CL) GRAVELLY LEAN CLAY WITH SAND,
light grayish olive (10Y 6/2), pale olive (5Y 6/3),
yellowish brown (10YR 5/8), Gray (10YR 6/1),
and white (10YR 8/1), low plasticity, wet,
200
cohesive, some silt, some fine to coarse sand,
little fine gravel
SD -
26
120
205
--------------------
(GP) POORLY GRADED GRAVEL WITH
SAND, light olive brown (2.5Y 5/3 and 5/4),
very pale brown (10Yr 8/2), white (white page N
9.5) and yellowish brown (10YR 5/4),
non -plastic, dry, non -cohesive, some very fine to
210
coarse sand, few silt

BORING NUMBER GWA-13D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 7 OF 9
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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REMARKS
MONITORING
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210
(GP) POORLY GRADED GRAVEL WITH
SAND, light olive brown (2.5Y 5/3 and 5/4),
very pale brown (10Yr 8/2), white (white page N
2
120
9.5) and yellowish brown (10YR 5/4),
non -plastic, dry, non -cohesive, some very fine to
coarse sand, few silt (continued)
215
— — — — — — — — — — — — — — — — — — — —
(ML) GRAVELLY SILT WITH SAND, mottled
grayish green (5GY 5/2) and light olive brown
(2.5Y 5/6), non -plastic, wet, cohesive, some
very fine to coarse sand, few fine to medium
220
gravel, few clay
SD-
28
120
225
— — — — — — — — — — — — — — — — — — — —
(GP) POORLY GRADED GRAVEL WITH
SAND, mottled light olive brown (2.5Y 5/3 and
5/4), light yellowish brown (2.5Y 6/3 and 6/4),
and olive yellow (2.5Y 6/6), non -plastic, moist,
non -cohesive, some very fine to coarse sand,
I trace silt--------------J
(CL) GRAVELLY LEAN CLAY WITH SAND,
mottled grayish green (5GY 5/2) and olive (5Y
5/4), low plasticity, wet, cohesive, some fine to
230
medium gravel, some silt, little very fine to
coarse sand
SD-
— — — — — — — — — — — — — — — — — — — —
29
120
(GP -GM) POORLY GRADED GRAVEL WITH
SILT AND SAND, mottled light olive gray (5Y
6/2), light gray (5Y 7/2), light yellowish brown
(2.5Y 6/3 and 6/4) and light olive brown (2.5Y
235
5/3 and 5/4), non -plastic, moist, non -cohesive,
some very fine to coarse sand, little silt
--------------------
(SP) POORLY GRADED SAND, light grayish
olive (10Y 6/2), non -plastic, wet, non -cohesive,
few silt
240
--------------------
(GP-GM) POORLY GRADED GRAVEL WITH
SILT AND SAND, mottled light grayish green
SD-
(5GY 6/2), pale olive (10Y 6/4), light grayish
30
100
olive (10Y 6/2), and olive yellow (5Y 6/6),
non -plastic, wet, non -cohesive, some very fine
to coarse sand, little silt
245

BORING NUMBER GWA-13D
S. Church Street,
Charlotte, NC28202-2075
Suite 900
PAGE
8 OF 9
F),440
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375
PROJECT LOCATION Gaston, NC
LLJ �
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DESCRIPTION
REMARKS
NION LL
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245
same as above except: thin intercalations of
Relic meta -diorite rock fragments, relict
gravelly silt and sand, mottled grayish green
phenocrysts consisting of plagioclase feldspar,
(5GY 5/2) and olive brown (2.5Y 6/6),
smoky quartz, and biotite, SAPROLITE
non -plastic, moist, cohesive, some very fine to
250
coarse sand, few fine to medium gravel, few
clay
SD -
31
120
255
Bottom of borehole at 257.0 feet.

Charlotte, NC28202-2075
F),440 S. Church Street, Suite 900
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NUMBER 269375
BORING NUMBER GWA-13D
PAGE 9 OF 9
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
LLI Z) c o e
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DESCRIPTION REMARKS NION LRING
cn Y
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Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 1 — GWA-13D: Sample SC-1 Depth: 0' — 5.0' Date: 03/18/16
Photo 2 — GWA-13D: Sample SC-1/2 Depth: 5.0' — 10.0' Date: 03/18/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 3 — GWA-13D: Sample SC-2 Depth: 10.0' — 15.0' Date: 03/21/16
Photo 4 — GWA-13D: Sample SC-2 Depth: 15.0' — 19.0' Date: 03/21/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 5 — GWA-13D: Sample SC-3 Depth: 19.0' — 24.0' Date: 03/21/16
Photo 6 — GWA-13D: Sample SC-3 Depth: 24.0' — 29.0' Date: 03/21/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 7 — GWA-13D: Sample SC-4 Depth: 29.0' — 34.0' Date: 03/21/16
Photo 8 — GWA-13D: Sample SC-4 Depth: 34.0' — 39.0' Date: 03/21/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 9 — GWA-13D: Sample SC-5 Depth: 39.0' — 44.0' Date: 03/21 /16
Photo 10 — GWA-13D: Sample SC-5 Depth: 44.0' — 49.0' Date: 03/21 /16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 11 — GWA-13D: Sample SC-6 Depth: 49.0' — 54.0' Date: 03/21/16
Photo 12 — GWA-13D: Sample SC-6 Depth: 54.0' — 59.0' Date: 03/21/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment ��
Appendix A, Sample Photographs
Photo 13 — GWA-13D: Sample SC-7 Depth: 59.0' — 64.0' Date: 03/21/16
Photo 14 — GWA-13D: Sample SC-7 Depth: 64.0' — 69.0' Date: 03/21/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 15 — GWA-13D: Sample SC-8 Depth: 69.0' — 74.0' Date: 03/21/16
Photo 16 — GWA-13D: Sample SC-8 Depth: 74.0' — 79.0' Date: 03/21/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 17 — GWA-13D: Sample SC-9 Depth: 84.0' — 89.0' Date: 03/21/16
Photo 18 — GWA-13D: Sample SC-10 Depth: 94.0' — 99.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment ��
Appendix A, Sample Photographs
Photo 19 — GWA-13D: Sample SC-11 Depth: 99.0' — 104.0' Date: 03/22/16
Photo 20 — GWA-13D: Sample SC-11 Depth: 104.0' — 109.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 21 — GWA-13D: Sample SC-12 Depth: 109.0' — 114.0' Date: 03/22/16
Photo 22 — GWA-13D: Sample SC-12 Depth: 114.0' — 119.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 23 — GWA-13D: Sample SC-13 Depth: 119.0' — 124.0' Date: 03/22/16
Photo 24 — GWA-13D: Sample SC-14 Depth: 124.0' — 129.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 25 — GWA-13D: Sample SC-15 Depth: 129.0' — 133.0' Date: 03/22/16
Photo 26 — GWA-13D: Sample SC-16 Depth: 133.0' — 139.0' Date: 03/22/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
Photo 27 — GWA-13D: Sample SC-17 Depth: 139.0' — 143.0' Date: 03/22/16
Riverbend
Dee+h:143-41'
a4e;
_R 1'� 6Po.: D. C a, rnp 6e if
Re u-ks; 5&r0e ( �h
Photo 28 — GWA-1311): Sample SC-18 Depth: 143.0' — 149.0' Date: 03/23/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 29 — GWA-13D: Sample SC-19 Depth: 149.0' — 153.0' Date: 03/23/16
Photo 30 — GWA-13D: Sample SC-20 Depth: 153.0' — 158.0' Date: 03/23/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 31 — GWA-13D: Sample SC-21 Depth: 158.0' — 161.0' Date: 03/23/16
Photo 32 — GWA-13D: Sample SC-22 Depth: 161.0' — 167.0' Date: 03/23/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 33 — GWA-13D: Sample SC-23 Depth: 167.0' — 177.0' Date: 03/31/16
Photo 34 — GWA-13D: Sample SC-24 Depth: 177.0' — 187.0' Date: 03/31/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 35 — GWA-13D: Sample SC-25 Depth: 187.0' — 197.0' Date: 04/01/16
Photo 36 — GWA-13D: Sample SC-26 Depth: 197.0' — 207.0' Date: 04/01/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 37 — GWA-13D: Sample SC-27 Depth: 207.0' — 217.0' Date: 04/01/16
Photo 38 — GWA-13D: Sample SC-28 Depth: 217.0' — 227.0' Date: 04/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 39 — GWA-13D: Sample SC-29 Depth: 227.0' — 237.0' Date: 04/01/16
gVKF- SNFF—'y
i 41V WA- SS '
�7-zv7
A4N HISNUK
a.,�.. Sc Sao
Photo 40 — GWA-13D: Sample SC-30 Depth: 237.0' — 247.0' Date: 04/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
.. TA
Photo 42 — GWA-13D: Sample SC-31 Depth: 247.0' — 257.0' Date: 04/11/16
Photo 43 — GWA-13D: Sample SC-32 Depth: 257.0' — 267.0' Date: 04/20/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 44 — GWA-13D: Sample SC-33 Depth: 267.0' — 272.0' Date: 04/20/16
PC". SSE -SS TA E.- T
�ca�t�av•. �VJA— \3�
Bow \ of
Photo 45 — GWA-13D: Box 1 of 1 Depth: 270.0' — 272.0' Date: 04/20/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

BORING NUMBER GWA-14S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 3
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 1/30/16 COMPLETED 1/30/16 GROUND ELEVATION TBD HOLE SIZE(S) 7 inches
DRILLING CONTRACTOR Cascade Drilling, L.P. NORTHING TBD EASTING TBD
DRILLING METHOD Sonic GROUND WATER LEVELS:
LOGGED BY J. Pendleton CHECKED BY DATE/TIME 2/15/2016 70.20 ft
NOTES Former coal pile location 1 DATE/TIME ---
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BORING NUMBER GWA-14S
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 2 OF 3
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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REMARKS
MONITORING
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440 S. Church Street, Suite 900
Charlotte, NC2875
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NUMBER 269375
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BORING NUMBER GWA-14S
PAGE 3OF3
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston. NC
REMARKS
WELL

BORING NUMBER GWA-14D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 1 OF 7
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
DATE STARTED 4/28/16 COMPLETED 4/28/16 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 J. Pendleton CHECKED BY DATE/TIME 4/28/2016 11:16:00 AM 61.20 ft
NOTES 1 DATE/TIME ---
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(ML) CLAYEY SILT, medium, red (2.5YR 4/8),
non -plastic, dry, non -cohesive, (SOIL)
5
SD-1
98
(SM) SILTY SAND, medium, light red (2.5YR
Sand - fine to medium grained, well rounded
10
6/6), non -plastic, moist, non -cohesive, (SOIL)
and sorted
15
SD-2
103
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(ML) CLAYEY SILT, stiff, yellow (10YR 7/6),
Laminae present with iron staining
non- to low plasticity, dry to moist,
non -cohesive, (SOIL)
20
25
SD-3
108
--------------------
(ML) CLAYEY SILT, stiff, mottled light red
(10YR 8/6) with reddish yellow (7.5YR 6/8),
30
non -plastic, dry, non -cohesive, (SOIL)
35

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BORING NUMBER GWA-14D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 2 OF 7
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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(ML) CLAYEY SILT, stiff, mottled light red
(10YR 8/6) with reddish yellow (7.5YR 6/8),
non -plastic, dry, non -cohesive, (SOIL)
(continued)
--------------------
(ML) SILT, medium, light red (7.5R 6/6) and
reddish yellow (7.5YR 6/6), low plasticity, moist,
40
non -cohesive, (SOIL)
45
SD-5
0
50
55
SD-6
97
(ML) SILT, medium, light red (7.5R 6/6) and
Mn nodules present with Fe and Mn staining,
reddish yellow (7.5YR 6/6), low plasticity, moist,
Laminae structure
non -cohesive, (SAPROLITE)
60
(ML) SILT, stiff, red (7.5R 6/6) and reddish
Saprolite becoming denser with depth
yellow (7.5YR 6/6), low plasticity, moist,
non -cohesive, (SAPROLITE)
65
SD-7
100
70

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BORING NUMBER GWA-14D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 3 OF 7
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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MONITORING
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(ML) SILT, stiff, red (7.5R 6/6) and reddish
yellow (7.5YR 6/6), low plasticity, moist,
non -cohesive, (SAPROLITE) (continued)
75
SD-8
115
Mn nodules, iron staining
80
85
SD-9
95
90
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(ML) SILT WITH SAND, stiff, red (7.5R 6/6) and
Transition zone into micaceous saprolite
reddish yellow (7.5YR 6/6) intermixed with light
grayish olive (10Y 6/2), white (8.5N) and strong
brown (7.5YR 5/8), non -plastic, moist,
non -cohesive, (SAPROLITE)
95
SD -
10
107
Bedrock split -spoon refusal at 195'
---------------------
(ML) SANDY SILT, stiff, light grayish olive (10Y
Micaceous material
6/2), with strong brown (7.5YR 5/8) and white
(8.5N), non -plastic, moist, non -cohesive,
(SAPROLITE)
100
1105

BORING NUMBER GWA-14D
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075 PAGE 4 OF 7
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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11110
(ML) SANDY SILT, stiff, light grayish olive (10Y
6/2), with strong brown (7.5YR 5/8) and white
(8.5N), non -plastic, moist, non -cohesive,
(SAPROLITE) (continued)
110
115
SD -
12
101
120
--------------------
(ML) SANDY SILT, hard, light grayish olive (10Y
6/2) and brownish yellow (10YR 6/8) and white
SD-
13
36
(8.5N), non -plastic, moist, non -cohesive,
(SAPROLITE)
(ML) SANDY SILT, hard, white (8.5N) with light
Driller hits hard material at 123'
50i3°
3
grayish olive (10Y 6/2), non -plastic, moist,
125
non -cohesive, (SAPROLITE)
(ML) SANDY SILT, hard, light grayish olive (10Y
Micaceous with foliation/no rock
130
SS -
5013"
3
6/2) and brownish yellow (10YR 6/6),
non -plastic, moist, non -cohesive, (SAPROLITE)
135
(ML) SANDY SILT, hard, white (8.5N), light
SS
5° 2
2
grayish olive (10Y 6/2) and brownish yellow
(10YR 6/6), non -plastic, moist, non -cohesive,
(SAPROLITE)
140
11

BORING NUMBER GWA-14D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 5 OF 7
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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(ML) SANDY SILT, hard, white (8.5N), light
grayish olive (10Y 6/2) and brownish yellow
(10YR 6/6), non -plastic, moist, non -cohesive,
(SAPROLITE) (continued)
145
SS - 4
50/2"
2
150
--------------------
(ML) SANDY SILT, hard, white (8.5N) and light
grayish olive (10Y 6/2) with brownish yellow
(10YR 6/6), non -plastic, moist, non -cohesive,
(SAPROLITE)
155
SS - 5
50/3"
3
160
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
(ML) SANDY SILT, hard/very dense, light
165
SS - 6
so/2
2
grayish olive (10Y 6/2) with white (8.5N),
non -plastic, moist, non -cohesive, (SAPROLITE)
170
175

BORING NUMBER GWA-14D
440 S. Church Street, Suite 900
Charlotte, NC28202-2075 PAGE 6 OF 7
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy PROJECT NAME Riverbend Data Gap Assessment
PROJECT NUMBER 269375 PROJECT LOCATION Gaston, NC
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(ML) SANDY SILT, hard/very dense, light
1
grayish olive (10Y 6/2) with white (8.5N),
non -plastic, moist, non -cohesive, (SAPROLITE)
(continued)
180
185
SS-8
50/0"
0
190
META -QUARTZ DIORITE, strong, white matrix
195
SS-9
50/0"
0
(8/4), with dark grayish green phenocrysts,
porphyritic, massive
200
Core socket to 200' (very strong competent
rock at greater than 96-200')
`
205
210

440 S. Church Street, Suite 900
Charlotte, NC2875
Phone:[phone]
hdrinc.com/follow-us
CLIENT Duke Energy
PROJECT NUMBER 269375
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BORING NUMBER GWA-14D
PAGE 7OF7
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston. NC
DESCRIPTION
Bottom of borehole at 218.0 feet.
REMARKS
WELL

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 1 — GWA-14D: Sample SC-1 Depth: 0' — 10.0' Date: 02/08/16
a -
Photo 2 — GWA-14D: Sample SC-2 Depth: 10.0' — 20.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 3 — GWA-14D: Sample SC-3 Depth: 20.0' — 30.0' Date: 02/08/16
Photo 4 — GWA-14D: Sample SC-4 Depth: 30.0' — 40.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 7 — GWA-14D: Sample SC-7 Depth: 60.0' — 70.0' Date: 02/08/16
Photo 8 — GWA-14D: Sample SC-8 Depth: 70.0' — 80.0' Date: 02/08/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 9 — GWA-14D: Sample SC-9 Depth: 80.0' — 90.0' Date: 02/08/16
Photo 10 — GWA-14D: Sample SC-10 Depth: 90.0' — 100.0' Date: 02/09/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 11 — GWA-14D: Sample SC-11 Depth: 100.0' — 110.0' Date: 02/09/16
—
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Photo 12 — GWA-14D: Sample SC-12 Depth: 110.0' — 120.0' Date: 02/09/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 13 — GWA-14D: Sample SC-13 Depth: 120.0' — 123.0' Date: 02/09/16
Photo 14 — GWA-14D: Sample SS-1 Depth: 123.0' — 125.0' Date: 02/09/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 15 — GWA-14D: Sample SS-2 Depth: 130.0' — 132.0' Date: 02/10/16
Photo 16 — GWA-14D: Sample SS-3 Depth: 137.0' — 139.0' Date: 02/10/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 17 — GWA-14D: Sample SS-4 Depth: 145.0' — 147.0' Date: 02/10/16
Photo 18 — GWA-14D: Sample SS-5 Depth: 155.0' — 157.0' Date: 02/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
Photo 19 — GWA-14D: Sample SS-6 Depth: 165.0' — 167.0' Date: 02/11/16
8�R-rAl� ��� 1°
SAMPLE ID
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ILIATE 7, -- it
Photo 20 — GWA-14D: Sample SS-7 Depth: 175.0' — 177.0' Date: 02/11/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
GLJA- KID
SAM ID
RECOVERY 0
art tas
DATA
Photo 21 — GWA-14D: Sample SS-8 Depth: 185.0' — 187.0' Date: 02/12/16
'3 . TA
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SITS
R1v1=2B1�
BORING
�, _ 140
SAMPLE ID
,
5 s - Ck
DEPTH
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�DATE
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Photo 22 — GWA-14D: Sample SS-9 Depth: 195.0' — 197.0' Date: 02/12/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Duke Energy Carolinas, LLC I Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs FN
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Photo 23 — GWA-14D: Box 1 of 2 Depth: 200.0' — 208.0' Date: 04/28/16
Photo 24 — GWA-14D: Box 2 of 2 Depth: 208.0' — 218.0' Date: 04/28/16
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]