NC0004961_4_FINAL_CSA Sup 2_Appx A_20160826

SD - 1
SD - 2
SD - 3
Organic debris intermixed
Mn nodules present in last 2 feet S-2
Mn nodules throughout S-3
Mn nodules residual laminated foliation and
fragmented quartz
Mn nodules becoming larger and staining
increasing
82
115
106
(CL) SILTY CLAY, stiff, red (2.5YR 4/8), plastic,
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)
(ML) SILT, medium, red (2.5YR 5/8),
non-plastic, moist, non-cohesive, (SOIL)
(ML) SILT, stiff, very pale brown (10YR 8/3) and
light red (2.5YR 7/6), non-plastic, moist,
non-cohesive, (SAPROLITE)
Color changes to yellowish brown (10YR 5/8) and
white (2.5Y 1/9)
NOTES
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 3/3/16 COMPLETED 3/3/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 7 inches
DATE/TIME ---
DATE/TIME 3/3/2016 3:45:00 PM 58.00 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
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(f
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)
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5
10
15
20
25
30
35
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PAGE 1 OF 2
BORING NUMBER BG-4S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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C
A
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8
8
4
7
3
\
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I
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B
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A

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A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 4
SD - 5
SD - 6
SD - 6
Water present on 4 5/8 at ~58' (3/3/16-15:45)
107
120
120
115
(ML) SILT, stiff, very pale brown (10YR 8/3) and
light red (2.5YR 7/6), non-plastic, moist,
non-cohesive, (SAPROLITE) (continued)
Brown color decreases/changes to light olive gray
(5Y 6/2) and white (2.5Y 1/9)
(ML) SILT, dense, light olive gray (5Y 6/2) and
white (2.5Y 1/9), non-plastic, moist,
non-cohesive, (SAPROLITE)
Bottom of borehole at 70.0 feet.
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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P
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E

T
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PAGE 2 OF 2
BORING NUMBER BG-4S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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O
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S
S
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S
S
M
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N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 7 – BG-4S: Sample S-7 Depth: 60.0’ - 70.0’ Date: 03/03/16

SD - 1
SD - 2
SD - 3
Lithology of BG-4S, logged 3/3/16 used for
first 70 feet
5" hole for coring/well; 9" hole for 6" PVC
Casing
Topsoil Present top 2'
Rock RQD values est. based on core produced
by rotosonic method: however, rotosonic
method greatly increased mechanical fractures
Sand fine to coarse grained, poorly sorted,
subangular
Mn nodules present at 15'
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)
Mn nodules, residuum laminae foliation,
containing relict fragmented quartz
Mn nodules, becoming much larger and
increase in staining (Mn)
81
115
106
(CL) SILTY CLAY, stiff, red (2.5YR 4/8), plastic,
moist, cohesive, (SOIL)
(ML) CLAYEY SILT, medium light red (2.5YR
7/6) with limited pale white (2.5Y 1/9),
non-plastic, dry, non-cohesive, (SOIL)
(ML) SILT WITH SAND, medium, red (2.5YR
7/6) and yellow (10yr 7/6), non-plastic, dry,
non-cohesive, (SOIL)
(ML) SILT, medium stiff, red (2.5YR 5/8),
non-plastic, dry, non-cohesive, (SOIL)
(ML) SILT, stiff, very pale brown (10YR 8/3) with
light red (2.5YR 7/6), medium plasticity, moist,
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
NOTES
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 3/3/16 COMPLETED 4/12/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 9 inches
DATE/TIME 4/12/2016 12:45:00 PM 53.50 ft
DATE/TIME ---
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
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(N

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)
MONITORING
WELL
SA
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PAGE 1 OF 4
BORING NUMBER BG-4D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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C
A
R
O
L
I
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3
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S
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G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 4
SD - 5
SD - 6
SD - 7
Presence of sand and brown color decreased
with depth and color changes to light olive gray
(5Y 6/2) and white (2.5Y 1/9) at 48'.
Water present on tooling at 58' (3-3-16)
S-8: First sample collected after return to BG-4
location on 4-5-16. Lithology of BG-4S used
for above
107
120
120
115
(ML) SILT WITH SAND, stiff, light olive gray (5Y
6/2), yellowish Brown (10YR 5/8), and white
(2.5Y 1/9), non-plastic, moist, non-cohesive,
(SAPROLITE)
(ML) SILT, stiff, light olive gray (5Y 6/2) and
white (2.5Y 1/9), non-plastic, moist,
non-cohesive, (SAPROLITE)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
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REMARKS
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PAGE 2 OF 4
BORING NUMBER BG-4D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
A
R
O
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B
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-

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8
8
8
4
7
3
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S
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S
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G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 8
SD - 9
SD -
10
SD -
11
SD -
12
Micaceous component present
No structural saprolite characteristics present
Sand becomes coarser, angular and poorly
sorted with depth
Micaceous characteristics and structural
laminae components return with saprolite
composition (sample very dry)
SP Sand, coarse, angular, poorly sorted
(residual diorite); ml-residual diabase with Fe
staining
48
60
109
120
120
(ML) SILT WITH SAND, medium stiff, light
yellowish brown (10YR 6/4), light olive gray (5Y
6/2) and white (2.5Y 1/9), non-plastic, moist,
non-cohesive, (SAPROLITE)
(SW) SAND, dense, light yellowish brown (10YR
6/4), non-plastic, moist, non-cohesive, (SOIL)
(ML) SILT WITH SAND, stiff, light yellowish
brown (10YR 6/4), non-plastic, moist,
non-cohesive, (SOIL)
(ML) SILT WITH SAND, stiff, light yellowish
brown (10YR 6/4) and white (2.5Y 1/9),
non-plastic, dry, non-cohesive, (SAPROLITE)
(SW) SAND, dense, light yellowish brown (10YR
6/4) with white (2.5Y 1/9), non-plastic, moist,
non-cohesive, (SAPROLITE)
(ML) SILT, stiff, greenish gray (GLAY 1, 6/56Y)
with yellow (2.5Y 7/6), non-plastic, moist,
non-cohesive, (SAPROLITE)
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
105
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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PAGE 3 OF 4
BORING NUMBER BG-4D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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C
A
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8
8
8
4
7
3
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S
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S
S
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G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD -
13
SD -
14
RC - 1
RC - 2
Residual Diorite
Residual Diabase
Mn staining and micaceous component
(113-115')
Bottom of borehole @ 124'; PVC casing
installed to 124'
124-126.3': core primarily diabase but contains
diorite contact, contact at ~80º contained
within diabase
126.3-129.8': Core completely diabase
129.8-132': Core again contains diorite
contact. Core transitions from completely
diabase (129.8') to completely diorite (131.7')
Fractures: 135': 10º open, no staining
Fractures: 137': 10º open, no staining
137.4-137.5': diabase intrusion
Fractures: 138.3': 10º open, no staining
Fractures: 138.6-138.7': 20º open, no staining
Bottom of BG-4D = 139'
78
100
120
0
(SW) SAND, dense, light yellowish brown (10YR
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,
non-cohesive, (SAPROLITE)
(SP) SAND, dense, light yellowish brown (10YR
6/4), non-plastic, moist, non-cohesive,
(SAPROLITE)
(ML) SILT, stiff, olive brown (2.5Y 4/4),
non-plastic, moist, non-cohesive, (SAPROLITE)
(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
META-QUARTZ DIORITE (same as above), with
metadiabase, very strong, very dark greenish
gray (GLAY 1 3/1), aphanitic, massive
METADIABASE very strong, dark greenish gray
(GLAY 1 3/1), aphanitic, massive
METADIABASE with META QUARTZ DIORITE
META-QUARTZ DIORITE
Bottom of borehole at 139.0 feet.
DE
P
T
H
(f
t
)
105
110
115
120
125
130
135
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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PAGE 4 OF 4
BORING NUMBER BG-4D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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A
S
S
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S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 7 – BG-4D: Sample 14 Depth: 119.0’ - 121.0’ Date: 04/5/16

Photo 8 – BG-4D: Sample S-14 Depth: 121.0’ - 124.0’ Date: 04/5/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 9 – BG-4D: Box 1of 2 Depth: 124.0’ - 134.0’ Date: 04/11/16

Photo 10 – BG-4D: Box 2of 2 Depth: 134.0’ - 139.0’ Date: 04/11/16 - 04/12/16

50/0"
SD - 1
SD - 2
SD - 3
SD - 4
RC - 1
RC - 2
Hole sizes: 9" - 0 to 27'; 5"-27-109', 6" PVC
casing
Sand - coarse grained, poorly sorted,
subangular to angular
Sand - fine to medium grained, moderate
sorting, subangular
Mn Nodules and staining in saprolite (24-25'),
bottom of S-3
Split-spoon/rock refusal at 25'
PVC casing installed to 27' (2-24-16)
Fracture Zone ~90% from 25 to 30' includes
epidote mineralization and Fe oxidation
staining (Core box 1: 25-38')
Rock RQD values estimated based on core
provided by rotosonic method; however
90
61
98
112
36
0
(SP-SM) SILTY SAND, medium, brown (10YR
5/3), non-plastic, moist, non-cohesive, (SOIL)
(SP-SM) SILTY SAND, medium, brown (10YR
5/3), non-plastic, moist, non-cohesive, (SOIL)
(CL) SILTY CLAY, medium, yellowish red (5Y
5/6), low to moderate plasticity, moist, cohesive,
(SOIL)
(SM) SILTY SAND, medium, very pale brown
(10YR 7/3), non-plastic, moist, non-cohesive,
(SOIL)
(ML) SANDY SILT, still, very pale brown (10YR
7/3) and very pale yellow (2.5Y /2), non-plastic,
moist, non-cohesive, (SAPROLITE)
META-QUARTZ DIORITE, strong, white matrix
(8/N), dark greenish gray (56Y 5/1), phaneritic,
massive
NOTES Southwest corner of property
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 2/23/16 COMPLETED 3/17/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 9 inches
DATE/TIME 3/17/2016 1:30:00 PM 65.00 ft
DATE/TIME 3/29/2016 1:30:00 PM 29.50 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
U
N
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S
(N

V
A
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)
MONITORING
WELL
SA
M
P
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/
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PAGE 1 OF 3
BORING NUMBER BG-5D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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A
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S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 3
RC - 4
RC - 5
RC - 6
RC - 7
RC - 8
rotosonic method greatly increases mechanical
fractures
Tight Fractures ~38-39' bgs, dip angle of 70º
with epidote mineralization (Core box 2: 38-50',
RC-3 and RC-4)
Fracture ~48-49', partially open fracture at 60º
with epidote and Fe staining
(Core Box 3: 50-60', RC-5 and RC-6)
Mechanical breaks throughout RC-7 and RC-8
due to sonic process (no fractures, natural or
mineralization identified (Core Box 4: 60-68.3',
RC-7 and RC-8)
(Core Box 5: 68.3-79.0', RC-9 and RC-10)
55
86
100
98
100
94
META-QUARTZ DIORITE, strong, white matrix
(8/N), dark greenish gray (56Y 5/1), phaneritic,
massive (continued)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
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)
MONITORING
WELL
SA
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PAGE 2 OF 3
BORING NUMBER BG-5D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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3
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A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 9
RC -
10
RC -
11
RC -
12
RC -
13
Fracture, at 75' (20º), open with no staining or
mineralization
Diabase dike appears at 78-79' (~30% of core)
(Core Box 6: 79-89.0')
86-89': Open fracture zone
Partially open fracture with mineralization (89')
Mechanical breaks throughout RC-12 due to
sonic process
93-94': Partially open fracture (80º) with no
mineralization (Core Box 7: 89-94')
(Core Box 8: 94-104)
Very good water production zone encountered
during RC-13 (94-104). Best
fractures/production zone in zone (98-103').
99-99.5': Open fracture (80º), no
mineralization
102-104': Fracture zone, open and closed
(40º), Fe staining
100
67
93
87
88
META-QUARTZ DIORITE, strong, white matrix
(8/N), dark greenish gray (56Y 5/1), phaneritic,
massive (continued)
META-QUARTZ DIORITE, strong, white matrix
(8/N), dark greenish gray (56Y 5/1), phaneritic,
massive
Diabase Dike: Metadiabase, moderate to strong,
dark grayish green (56Y 4/2), aphanitic and
massive (see remark)
Bottom of borehole at 104.0 feet.
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
BL
O
W
CO
U
N
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S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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PAGE 3 OF 3
BORING NUMBER BG-5D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 3 – BG-5D: Sample S-3 Depth: 20.0’ - 25.0’ Date: 02/23/16

Photo 4 – BG-5D: Box 1of 8 Depth: 25.0’ - 38.0’ Date: 02/29/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 5 – BG-5D: Box 2 of 8 Depth: 38.0’ - 50.0’ Date: 02/29/16

Photo 6 – BG-5D: Box 3 of 8 Depth: 50.0’ - 60.0’ Date: 02/29/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 7 – BG-5D: Box 4 of 8 Depth: 60.0’ - 68.3’ Date: 02/29/16

Photo 8 – BG-5D: Box 5 of 8 Depth: 68.3’ - 73.3’ Date: 02/29/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 11 – BG-5D: Box 7 of 8 Depth: 89.0’ - 94.0’ Date: 02/29/16

Photo 12 – BG-5D: Box 8 of 8 Depth: 94.0’ - 104.0’ Date: 02/29/16

SD - 1
SD - 2
SD - 3
PVC casing placed 2' below bottom of BG-5D
well screen (103'). Rock RQD values
estimated based on core provided by rotosonic
method. Method greatly increased mechanical
fractures
Sand- medium to coarse grained, poorly
sorted, subangular
Sand - coarse grained, poorly sorted
subangular to angular
Sand - fine to medium grained, moderate
sorting, subangular
98
97
50
(SP-SM) SILTY SAND, medium brown (10YR
5/3), non-plastic, moist, non-cohesive, (SOIL)
(SP-SM) SILTY SAND, medium dark brown
(10YR 3/3), non-plastic, moist, non-cohesive,
(SOIL)
(CL) SILTY CLAY, medium yellowish red (5Y
5/6), low to moderate plasticity, moist, cohesive,
(SOIL)
(SM) SILTY SAND, medium, very pale brown
(10YR 7/3), non-plastic, moist, non-cohesive,
(SOIL)
See BG-5D Log for Description to 104'
NOTES
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 4/1/16 COMPLETED 4/4/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 9 inches
DATE/TIME ---
DATE/TIME 4/2/2016 88.00 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
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(N

V
A
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U
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)
MONITORING
WELL
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PAGE 1 OF 5
BORING NUMBER BG-5BR
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
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O
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G
A
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A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
See BG-5D Log for Description to 104'
(continued)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
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/
NO
.
/
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PAGE 2 OF 5
BORING NUMBER BG-5BR
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
A
R
O
L
I
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A

B
O
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C
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0
8
8
8
4
7
3
\
R
I
V
E
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B
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D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
See BG-5D Log for Description to 104'
(continued)
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
105
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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P
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PAGE 3 OF 5
BORING NUMBER BG-5BR
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
A
R
O
L
I
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A

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8
8
4
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3
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I
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D
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A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 1
RC - 2
RC - 3
RC - 4
(core Box 1: 105.5-114.5')
Fracture 108.7-110' (20º to vertical) quartz and
Mn filled
Fracture 111.8 to 114.0' (70-80º) open
fracture with trace epidote on fracture surface
(core box 2: 114.5-124.5')
Fracture: 117', 50º, open
Fracture: 119.5', 35º, open
Fracture: 120.8', 60º, open
Fracture: 122.5', 70º, open
(core box 3: 124.5-134.5)
Fracture: 126.5-130', 70º, large open fracture,
quartz mineralization, Mn staining
127-127.5' (70-75º), closed, quartz filled
fracture (Mn staining)
Diabase dike contact with diorite forming
unakite (unakite fractures 70-90º)
(Core Box 4: 134.5-144.0')
134.5': closed, unakite filled, 30º
135.5': closed, fracture with pyrite and unakite,
40º
136-139.5': 55-75º, group of open fractures
with quartz and unakite mineralization
97
90
93
82
PVC Casing at 105'
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
Cross-cutting dike consists of fine grained
orthoclase feldspar, quartz, and biotite (50º)
Same as above
Interval same as above 120-121.8'
Orthoclase feldspar, quartz, epidote, hornblende
along fracture zones from 126.5-130.0'
METADIABASE, dark greenish gray, (GLAY 1
56Y 4/1), aphanitic, massive with quartz and
unakite filled fractures (diabase pyroxene rich)
META-QUARTZ DIORITE same as above
DE
P
T
H
(f
t
)
105
110
115
120
125
130
135
140
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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P
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/
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PAGE 4 OF 5
BORING NUMBER BG-5BR
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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C
A
R
O
L
I
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A

B
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:
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4
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3
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I
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A
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A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 5
RC - 6
RC - 7
141-143.5', vertical open fracture
(Core Box 5: 144.0-154.0')
145.5', 50º, partially open fracture with quartz
filling
147.5', 65º, open with unakite mineralization
(core box 6: 154.0-164.0')
Fracture: 154.5', 80º, unakite filled
Fracture: 156.5', 65º, partially filled with
epidote and pyrite
Fracture: 162.0', 75º, partially filled with
epidote
75
61
100
META-QUARTZ DIORITE same as above
(continued)
Bottom of borehole at 164.0 feet.
DE
P
T
H
(f
t
)
140
145
150
155
160
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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P
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PAGE 5 OF 5
BORING NUMBER BG-5BR
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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C
A
R
O
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I
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A

B
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-

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I
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J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 3 – BG-5BR: Sample S-3 Depth: 20.0’ - 25.0’ Date: 02/25/16

Photo 4 – BG-5BR: Box 1 of 6 Depth: 105.5’ - 114.5’ Date: 04/01/16 - 04/03/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 5 – BG-5BR: Box 2 of 6 Depth: 114.5’ - 124.5’ Date: 04/01/16 - 04/03/16

Photo 6 – BG-5BR: Box 3 of 6 Depth: 124.5’ - 134.5’ Date: 04/01/16 - 04/03/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 7 – BG-5BR: Box 4 of 6 Depth: 134.5’ - 144.0’ Date: 04/01/16 - 04/03/16

Photo 8 – BG-5BR: Box 5 of 6 Depth: 144.0’ - 154.0’ Date: 04/01/16 - 04/03/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 9 – BG-5BR: Box 6 of 6 Depth: 154.0’ - 164.0’ Date: 04/01/16 - 04/03/16

SD - 1
SD - 2
SD - 3
Approximately 6" topsoil with organic debris
Potentially compacted material associated with
construction of dam
Density of material decreasing with depth
Mn Nodules & Mn staining present (foliation &
structural deformation present)
Sand, fine to medium, well rounded
Compacted fill material associated with dam
decreasing
92
100
98
(CL) CLAY, stiff, yellowish red (5Y 5/6), low
plasticity, moist, cohesive, (SOIL)
same as above
(ML) SILT, medium red (2.5YR 4/6), and
brownish yellow (10YR 6/6), non-plastic, moist,
cohesive, (SOIL)
(ML) SANDY SILT, medium red (2.5YR 4/6) and
brownish yellow (10YR 6/6), medium plasticity,
moist, cohesive, (SAPROLITE)
NOTES Location at toe of dam
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 2/6/16 COMPLETED 2/6/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 7 inches
DATE/TIME ---
DATE/TIME 2/6/2016 11:20:00 AM 45.50 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
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(f
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)
0
5
10
15
20
25
30
35
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PAGE 1 OF 2
BORING NUMBER GWA-2S-A
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 4
SD - 5
SD - 6
Change in color at ~41'
Moisture causes material softness
Water notice on rods at ~45-46'
Mn nodules and foliation
120
120
(ML) SANDY SILT, medium red (2.5YR 4/6) and
brownish yellow (10YR 6/6), medium plasticity,
moist, cohesive, (SAPROLITE) (continued)
Red (2.5YR 4/6), foliation disappears, moisture
increases
(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),
non-plastic, moist, non-cohesive (SAPROLITE)
Bottom of borehole at 60.0 feet.
DE
P
T
H
(f
t
)
35
40
45
50
55
60
BL
O
W
CO
U
N
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S
(N

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)
MONITORING
WELL
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PAGE 2 OF 2
BORING NUMBER GWA-2S-A
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Boring advanced for purpose of installing
monitoring well See GWA-11D for Lithology
Bottom of borehole at 32.0 feet.
NOTES Adjacent to Catawba River
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 2/3/16 COMPLETED 2/4/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)7 inches
DATE/TIME ---
DATE/TIME 2/4/2016 8:10:00 AM 0.00 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
BL
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CO
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PAGE 1 OF 1
BORING NUMBER GWA-11S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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S
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G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 1 – GWA-11S: Sample S-1 Depth: 0.0’ - 10.0’ Date: 02/03/16

Photo 2 – GWA-11S: Sample S-2 Depth: 10.0’ - 20.0’ Date: 02/03/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 3 – GWA-11S: Sample S-3 Depth: 20.0’ - 30.0’ Date: 02/03/16

SD - 1
SD - 2
SD - 3
Rotosonic collection of 10' core samples and
core barrel samples
Zone of black discoloration associated with
wood debris (possible burning)
No residual ash identified (Zone approximately
2' at 17-19')
114
120
120
(SM) SILTY SAND, light yellowish brown (10YR
6/4) and red (2.5YR 4/8), non-plastic, moist,
cohesive (SOIL)
(CL) CLAY WITH SAND, stiff, red (2.5YR 4/8)
and light yellowish brown (10YR 6/4), medium
plasticity, moist, cohesive (SOIL)
(CL) CLAY WITH SAND, stiff, olive gray (5Y
5/2) and black (2.5/1), low plasticity, moist,
cohesive (SOIL)
19-27': same as S-17
(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)
NOTES
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 1/31/16 COMPLETED 2/20/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 7, 9, 11 inches
DATE/TIME ---
DATE/TIME ---
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
U
N
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S
(N

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A
L
U
E
)
MONITORING
WELL
SA
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PAGE 1 OF 4
BORING NUMBER GWA-11D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 4
SD - 5
SD - 6
AU - 1
Density increasing quartz fragments present
Driller indicates that hard material hit at ~59'
Sub to core barrel breaks on 50-70' run. Barrel
reaches 70' and full of material. Used material
from core barrel to describe lithology from
60-70'.
114
120
92
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,
micaceous (SAPROLITE) (continued)
same as above
(SW-SM) SAND WITH SILT AND GRAVEL,
very dense, very pale (10YR 7/4), non-plastic,
moist, non-cohesive, gravel (WEATHERED
ROCK)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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P
L
E

T
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/
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/
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PAGE 2 OF 4
BORING NUMBER GWA-11D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
50
50
AU - 2
SS - 1
SS - 2
RC - 1
Unable to recover material from 80-82 (driller
using core sampler)
Contact between saprolite and weathered rock
estimated
Bottom of casing at 94'
Core fragmented due to rotosonic
Core completely fragmented due to rotosonic
process
85
0
0
0
(SW-SM) SAND WITH SILT AND GRAVEL,
very dense, very pale (10YR 7/4), non-plastic,
moist, non-cohesive, gravel (WEATHERED
ROCK) (continued)
(SW-SM) SAND WITH SILT AND GRAVEL,
very dense, greenish gray (5G 5/1), non-plastic,
moist, non-cohesive (WEATHERED ROCK)
(GM) GRAVEL WITH SAND AND SILT, very
dense, greenish gray (5G 5/1), non-plastic,
moist, non-cohesive (WEATHERED ROCK)
META-QUARTZ DIORITE, strong to very strong,
white matrix (8N) with very dark greenish gray
(5G 3/1), phenocrysts, coarse grained,
non-foliated, massive
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
105
BL
O
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CO
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S
(N

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)
MONITORING
WELL
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PAGE 3 OF 4
BORING NUMBER GWA-11D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 2
RC - 3
Mineralization - potassium feldspar present
from ~113-115
100
92
META-QUARTZ DIORITE, strong to very strong,
white matrix (8N) with very dark greenish gray
(5G 3/1), phenocrysts, coarse grained,
non-foliated, massive (continued)
Bottom of borehole at 115.0 feet.
DE
P
T
H
(f
t
)
105
110
115
BL
O
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CO
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(N

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MONITORING
WELL
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PAGE 4 OF 4
BORING NUMBER GWA-11D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 1 – GWA-11D: Sample S-1 Depth: 0.0’ - 10.0’ Date: 01/31/16

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

Photo 3 – GWA-11D: Sample S-3 Depth: 20.0’ - 30.0’ Date: 01/31/16

Photo 4 – GWA-11D: Sample S-4 Depth: 30.0’ - 40.0’ Date: 01/31/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 5 – GWA-11D: Sample S-5 Depth: 40.0’ - 50.0’ Date: 01/31/16

Photo 6 – GWA-11D: Sample S-6 Depth: 50.0’ - 59.0’ Date: 02/01/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 7 – GWA-11D: Sample S-7/C-1 Depth: 60.0’ - 70.0’ Date: 02/01/16

Photo 8 – GWA-11D: Sample SS-1 Depth: 85.0’ - 87.0’ Date: 02/02/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 9 – GWA-11D: Sample C-3 Depth: 90.0’ - 94.0’ Date: 02/04/16

Photo 10 – GWA-11D: Box 1 of 2 Depth: 95.0’ - 105.0’ Date: 02/20/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 11 – GWA-11D: Box 2 of 2 Depth: 105.0’ - 115.0’ Date: 02/20/16

Boring advanced for purpose of well
installation See GWA-12D for Lithology
Bottom of borehole at 32.0 feet.
NOTES Former coal pile location
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 1/30/16 COMPLETED 1/30/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)7 inches
DATE/TIME ---
DATE/TIME 1/30/2016 12:35:00 PM 19.80 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
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T
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P
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/
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/
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PAGE 1 OF 1
BORING NUMBER GWA-12S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
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U
S

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A
B
.
G
D
T

-

8
/
2
4
/
1
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1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
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\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 1
SD - 2
SD - 3
Rotosonic provides 4 5/8" OD, ~3" sample
(10')
Micaceous constituents
120
115
101
(ML) SILT WITH SAND, medium brown (10YR
5/3) with red (10R 5/6), non-plastic, moist,
non-cohesive, fine to medium grained (FILL)
(ML) SILT, medium, light grayish olive (10Y/6),
non-plastic, moist, cohesive, very fine grained
(SOIL)
(ML) SILT, medium, light yellowish brown (10YR
6/4), non-plastic, moist, cohesive (SOIL)
(SM) SILTY SAND, dense, gray (5Y 6/1),
mottled white (9.5N), non-plastic, moist,
cohesive (SAPROLITE)
NOTES
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 1/19/16 COMPLETED 1/31/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)7, 9 inches
DATE/TIME ---
DATE/TIME ---
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
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/
NO
.
/
C
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R
E

R
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REMARKS
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PAGE 1 OF 6
BORING NUMBER GWA-12D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 4
SD - 5
SD - 6
SD - 7
Material becoming harder with depth
120
108
115
106
(SM) SILTY SAND, dense, gray (5Y 6/1),
mottled white (9.5N), non-plastic, moist,
cohesive (SAPROLITE) (continued)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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Y

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PAGE 2 OF 6
BORING NUMBER GWA-12D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
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S
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/
2
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/
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1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
50/2"
50/0"
SD - 8
SS - 1
SS - 2
SS - 3
Split Spoon Sample (SS-1) collected at 85' to
test potential refusal (driller indicates potential
rock present)
Displacement core used from 85-90'
Collect SS-2 to check for potential rock again
(saprolite very tight)
102
2
0
(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)
(SM) SILTY SAND, light brownish gray (2.5Y
6/2), with white (10YR -/1), very dark gray
(7.5YR 3/1), non-plastic, wet, non-cohesive
(SAPROLITE)
(SW) SAND, medium dense, white (2.5Y 8/1),
non-plastic, moist, non-cohesive, micaceous,
medium to coarse grained (SAPROLITE)
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
105
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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Y

%
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PAGE 3 OF 6
BORING NUMBER GWA-12D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
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G
D
T

-

8
/
2
4
/
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6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 1
RC - 2
Rotosonic core barrel used to try and collect
material; however flows out at surface - SW
sand
Driller uses core barrel to obtain core from
122-123'
Bottom of 6" casing at 125'
Core through lens of quartz diorite, ~3-4' thick
Description from cuttings, no sample obtained
from core barrel
(SW) SAND, medium dense, white (2.5Y 8/1),
non-plastic, moist, non-cohesive, micaceous,
medium to coarse grained (SAPROLITE)
(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
(SW-SM) SAND WITH SILT, very dense, white
(N9), mottled olive (5Y 5/3), non-plastic, moist,
non-cohesive, quartz fragments (WEATHERED
ROCK)
DE
P
T
H
(f
t
)
105
110
115
120
125
130
135
140
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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C
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R
Y

%
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PAGE 4 OF 6
BORING NUMBER GWA-12D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 3
RC - 4
RC - 5
No material staying in core barrel
(SW-SM) SAND WITH SILT, very dense, white
(N9), mottled olive (5Y 5/3), non-plastic, moist,
non-cohesive, quartz fragments (WEATHERED
ROCK) (continued)
META-QUARTZ DIORITE, moderate to strong,
dark greenish gray (5GY 4/1), aphanitic,
massive, irregular veins of calcite
DE
P
T
H
(f
t
)
140
145
150
155
160
165
170
175
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
C
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RE
C
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V
E
R
Y

%
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PAGE 5 OF 6
BORING NUMBER GWA-12D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
RC - 6
RC - 7
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
Bottom of borehole at 190.0 feet.
DE
P
T
H
(f
t
)
175
180
185
190
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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Y

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PAGE 6 OF 6
BORING NUMBER GWA-12D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 1 – GWA-12D: Sample C-1 Depth: 122.0’ - 123.0’ Date: 01/27/16

Photo 2 – GWA-12D: Box1 of 1 Depth: 170.0’ - 180.0’ Date: 01/29/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 3 – GWA-12D: Box1 of 1 Depth: 170.0’ - 180.0’ Date: 01/29/16

SD - 1
SD - 2
SD - 3
SD - 4
84
120
120
120
Topsoil
(GW-GC) GRAVEL WITH CLAY AND SAND,
yellowish red (5YR 5/6), moist, low plasticity,
cohesive (ALLUVIUM)
(ML) SILT WITH SAND, red (10R 5/8) and
yellow (10YR 7/6), dry, non-plastic,
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,
non-cohesive, with fine to coarse sand,
phaneritic (SAPROLITE)
(ML) SILT, red (2.5YR 4/6) to red (10R 4/4), dry
to moist, non-plastic, non-cohesive
(SAPROLITE)
NOTES
LOGGED BY T. Campbell CHECKED BY
DATE STARTED 4/28/16 COMPLETED 4/28/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)6, 10 inches
DATE/TIME 4/29/2016 11:15:00 AM 49.80 ft
DATE/TIME 4/28/2016 50.00 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
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REMARKS
RO
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PAGE 1 OF 2
BORING NUMBER GWA-13S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
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J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 5
SD - 6
SD - 7
Frequent relic structure and Mn nodules/filling
Water level ~50'; measured during drilling and
seen on rods
120
120
60
(ML) SILT, red (2.5YR 4/6) to red (10R 4/4), dry
to moist, non-plastic, non-cohesive
(SAPROLITE)
(ML) SILT WITH SAND, red (2.5YR 5/8), yellow
(10YR 8/6), and white (10YR 8/1) and black
(10YR 2.5/1), dry, non-plastic, non-cohesive
(SAPROLITE)
(ML) SILT WITH SAND, grayish brown (10YR
5/2), yellow (10YR 8/6), and white (N 9.5),
moist, non-plastic, non-cohesive (SAPROLITE)
Bottom of borehole at 62.0 feet.
DE
P
T
H
(f
t
)
35
40
45
50
55
60
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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PAGE 2 OF 2
BORING NUMBER GWA-13S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 1 – GWA-13S: Sample S-1 Depth: 0.0’ - 7.0’ Date: 04/28/16

Photo 2 – GWA-13S: Sample S-2 Depth: 7.0’ - 17.0’ Date: 04/28/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 5 – GWA-13S: Sample S-5 Depth: 37.0’ - 47.0’ Date: 04/28/16

Photo 6 – GWA-13S: Sample S-6 Depth: 47.0’ - 57.0’ Date: 04/28/16

Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Supplement II
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 7 – GWA-13S: Sample S-7 Depth: 57.0’ - 63.0’ Date: 04/28/16

SD - 1
SD - 2
SD - 3
SD - 4
10" casing, 5" well
hole sizes: 10" 0-10'; 6" 10-160'
26-36.0': relic fractures common with Fe and
Mn filling (shear zone)
108
120
120
120
Topsoil
(GW-GC) GRAVEL WITH CLAY AND SAND,
yellowish red (5YR 5/6), moist, large to small
rounded gravel, fine to coarse sand, fines low
plasticity, cohesive (ALLUVIUM)
(ML) SILT WITH SAND, red (10R 5/8) and
yellow (10YR 7/6), dry, non-plastic,
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,
non-cohesive, with fine to coarse sand,
phaneritic (SOIL)
(ML) SILT, dark red (10R 3/6) and dusky red (5R
3/2), dry, non-plastic, non-cohesive, aphanitic,
blocky (SAPROLITE)
NOTES
LOGGED BY T. Campbell CHECKED BY
DATE STARTED 3/18/16 COMPLETED 4/29/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)6, 10 inches
DATE/TIME 3/23/2016 8:00:00 AM 52.50 ft
DATE/TIME 4/29/2016 11:35:00 AM 51.60 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
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H
(f
t
)
0
5
10
15
20
25
30
35
BL
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WELL
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PAGE 1 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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H

C
A
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O
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A

B
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440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 5
SD - 6
SD - 7
41.0-43.0': Aplite dike, mylonitic in part
43.0-53.0': Frequent relict fractures with Mn
filling
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')
68.5-69.0': frequent relict fractures with Mn
filling
120
120
120
(ML) SILT, red (2.5YR 4/6) to weak red (10R
4/4), dry to moist, non-plastic, non-cohesive,
aphanitic, massive (SAPROLITE)
(GW-GM) GRAVEL WITH SILT, white (NG) and
yellowish brown (10YR 5/4), dry, gravel-size
quartz fragments with silt
(SAPROLITE/WEATHERED ROCK)
(ML) SILT WITH SAND, red (2.5YR 5/8), yellow
(10YR 8/6), white (10YR 8/1), and black (10YR
2.5/1), dry, non-plastic, non-cohesive, with fine
to coarse sand, (SAPROLITE)
GRADATIONAL CONTACT
(ML) SILT WITH SAND, grayish brown (10YR
5/2), yellow (10YR 8/6), and white (N 9.5),
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)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
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E

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/
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.
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PAGE 2 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
A
R
O
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I
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B
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P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 8
SD - 9
SD -
10
SD -
11
75-85.0': occasional Mn-filled relict fractures
85-95.0': Frequent relict fractures with Fe, Mn
filling
100-124.0': Weathered Meta-quartz diorite
120
120
110
120
(ML) SILT WITH SAND, grayish brown (10YR
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)
(ML) SILT, light yellowish brown (2.5YR 6/3),
moist, non-plastic, non-cohesive, aphanitic
(SAPROLITE)
(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)
(SM) silty Sand as above except more granular
(SM) SILTY SAND, light brownish gray (10R
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)
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
105
BL
O
W
CO
U
N
T
S
(N

V
A
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U
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)
MONITORING
WELL
SA
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PAGE 3 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
A
R
O
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I
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B
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440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD -
12
SD -
13
SD -
14
SD -
15
SD -
16
110-110.0': weathered meta-diabase
116-116.5': Weathered meta-diabase
124-127.0': weathered meta-diabase
127-153.0': Weathered meta-quartz diorite
with laminae of weathered meta-diabase
120
60
60
48
72
(SM) SILTY SAND, light brownish gray (10R
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)
(ML) SILT, olive gray (5YR 4/2), dry, non-plastic,
non-cohesive, aphanitic with ~1 mm feldspar
phenocrysts
116.0-116.5' (ML) silt, same as 110-111.0'
(SAPROLITE)
(SM) SILTY SAND, white (N 9.5) and light
brownish gray (10YR 6/2), dry, fine to medium
grained weathered feldspar and quartz, fines
non-plastic, non-cohesive, phaneritic
(SAPROLITE)
(SW-SM) SAND WITH SILT, olive brown (2.5Y
4/3), moist, low plasticity, cohesive, aphanitic,
with 1 mm feldspar phenocrysts, indistinct
sub-horizontal foliation (SAPROLITE)
(SM) SILTY SAND, white (N 9.5) and light
brownish gray (10YR 6/2), dry, fine to medium
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)
DE
P
T
H
(f
t
)
105
110
115
120
125
130
135
140
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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P
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E

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/
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.
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PAGE 4 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

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S

L
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B
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G
D
T

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O
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0
8
8
8
4
7
3
\
R
I
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E
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B
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D
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G
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S
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S
M
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N
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G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD -
17
SD -
18
SD -
19
SD -
20
SD -
21
SD -
22
SD -
23
153-154.0': weathered meta-diabase
154-163.0': weathered meta-quartz diorite
163.0': weathered meta-quartz diorite with
laminae of weathered meta-diabase
Meta-diorite rock fragments and plagioclase
feldspar and quartz grains are common, relict
phenocrysts present, SAPROLITE
Meta-diorite rock fragments and plagioclase
feldspar and quartz grains are common
Plagioclase, quartz and muscovite grains are
common, relict phenocrysts present,
48
0
48
60
36
72
120
(SM) SILTY SAND, white (N 9.5) and light
brownish gray (10YR 6/2), dry, fine to medium
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)
(ML) SANDY SILT, as above except less
granular
(SW-SM) SAND WITH SILT, olive (5Y 4/3),
moist, fine to coarse weathered rock fragments,
fines low plasticity, cohesive, aphanitic, with 1
mm feldspar phenocrysts (SAPROLITE)
(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)
(SM) SILTY SAND, as above except light
brownish gray (10YR 6/2) and White (N9.5)
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
and 5/4), light grayish olive (10Y 6/2), and
grayish olive (10Y 5/2); low plasticity, wet,
cohesive, some silt and very fine to coarse
sand, trace fine gravel
(GP) POORLY GRADED GRAVEL WITH
SAND, light gray (5Y 7/2) and light olive gray
(5Y 6/2), non-plastic, dry, non-cohesive
DE
P
T
H
(f
t
)
140
145
150
155
160
165
170
175
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
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PAGE 5 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
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C
A
R
O
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I
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A

B
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8
8
8
4
7
3
\
R
I
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B
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N
D

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A
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A

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A
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A
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S
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S
S
M
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N
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.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD -
24
SD -
25
SD -
26
SAPROLITE
Same as above except relict foliation planes
and phenocrysts present, SAPROLITE
relict phenocrysts present, SAPROLITE
Meta-diorite rock fragments and plagioclase
feldspar and quartz grains are common, relict
phenocrysts present, SAPROLITE
120
120
120
(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
some fine gravel (continued)
Same as above except: change in color at
182-185' to mottled dark brown (10YR 3/3), light
yellowish brown (10YR 6/4), brownish yellow
(10YR 6/6 and 6/8), reddish brown (5YR 4/4),
light greenish gray (GLEY2 7/1), and bluish
black (GLEY2 2.5/1)
(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
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,
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
coarse sand, little fine gravel
(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
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,
cohesive, some silt, some fine to coarse sand,
little fine gravel
(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
coarse sand, few silt
DE
P
T
H
(f
t
)
175
180
185
190
195
200
205
210
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
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REMARKS
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PAGE 6 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD -
27
SD -
28
SD -
29
SD -
30
120
120
120
100
(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
coarse sand, few silt (continued)
(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
gravel, few clay
(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,
trace silt
(CL) GRAVELLY LEAN CLAY WITH SAND,
mottled grayish green (5GY 5/2) and olive (5Y
5/4), low plasticity, wet, cohesive, some fine to
medium gravel, some silt, little very fine to
coarse sand
(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
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
(GP-GM) POORLY GRADED GRAVEL WITH
SILT AND SAND, mottled light grayish green
(5GY 6/2), pale olive (10Y 6/4), light grayish
olive (10Y 6/2), and olive yellow (5Y 6/6),
non-plastic, wet, non-cohesive, some very fine
to coarse sand, little silt
DE
P
T
H
(f
t
)
210
215
220
225
230
235
240
245
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
C
K
RE
C
O
V
E
R
Y

%
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PAGE 7 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD -
31
Relic meta-diorite rock fragments, relict
phenocrysts consisting of plagioclase feldspar,
smoky quartz, and biotite, SAPROLITE
120
same as above except: thin intercalations of
gravelly silt and sand, mottled grayish green
(5GY 5/2) and olive brown (2.5Y 6/6),
non-plastic, moist, cohesive, some very fine to
coarse sand, few fine to medium gravel, few
clay
Bottom of borehole at 257.0 feet.
DE
P
T
H
(f
t
)
245
250
255
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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K
RE
C
O
V
E
R
Y

%
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PAGE 8 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
DE
P
T
H
(f
t
)
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
C
K
RE
C
O
V
E
R
Y

%
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PAGE 9 OF 9
BORING NUMBER GWA-13D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 27 – GWA-13D: Sample SC-17 Depth: 139.0’ – 143.0’ Date: 03/22/16

Photo 28 – GWA-13D: Sample SC-18 Depth: 143.0’ – 149.0’ Date: 03/23/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 39 – GWA-13D: Sample SC-29 Depth: 227.0’ – 237.0’ Date: 04/01/16

Photo 40 – GWA-13D: Sample SC-30 Depth: 237.0’ – 247.0’ Date: 04/11/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 44 – GWA-13D: Sample SC-33 Depth: 267.0’ – 272.0’ Date: 04/20/16

Photo 45 – GWA-13D: Box 1 of 1 Depth: 270.0’ – 272.0’ Date: 04/20/16
NOTES Former coal pile location
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 1/30/16 COMPLETED 1/30/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)7 inches
DATE/TIME ---
DATE/TIME 2/15/2016 70.20 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
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E

R
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PAGE 1 OF 3
BORING NUMBER GWA-14S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
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H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
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E

R
U
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REMARKS
RO
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R
Y

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PAGE 2 OF 3
BORING NUMBER GWA-14S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
DE
P
T
H
(f
t
)
70
75
80
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
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REMARKS
RO
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Y

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PAGE 3 OF 3
BORING NUMBER GWA-14S
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 1
SD - 2
SD - 3
Sand - fine to medium grained, well rounded
and sorted
Laminae present with iron staining
98
103
108
(ML) CLAYEY SILT, medium, red (2.5YR 4/8),
non-plastic, dry, non-cohesive, (SOIL)
(SM) SILTY SAND, medium, light red (2.5YR
6/6), non-plastic, moist, non-cohesive, (SOIL)
(ML) CLAYEY SILT, stiff, yellow (10YR 7/6),
non- to low plasticity, dry to moist,
non-cohesive, (SOIL)
(ML) CLAYEY SILT, stiff, mottled light red
(10YR 8/6) with reddish yellow (7.5YR 6/8),
non-plastic, dry, non-cohesive, (SOIL)
NOTES
LOGGED BY J. Pendleton CHECKED BY
DATE STARTED 4/28/16 COMPLETED 4/28/16
GROUND WATER LEVELS:DRILLING METHOD Sonic
DRILLING CONTRACTOR Cascade Drilling, L.P.
HOLE SIZE(S)5, 10 inches
DATE/TIME ---
DATE/TIME 4/28/2016 11:16:00 AM 61.20 ft
GROUND ELEVATION TBD
NORTHING TBD EASTING TBD
DE
P
T
H
(f
t
)
0
5
10
15
20
25
30
35
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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RE
C
O
V
E
R
Y

%
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(
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PAGE 1 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 4
SD - 5
SD - 6
SD - 7
Mn nodules present with Fe and Mn staining,
Laminae structure
Saprolite becoming denser with depth
0
0
97
100
(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,
non-cohesive, (SOIL)
(ML) SILT, medium, light red (7.5R 6/6) and
reddish yellow (7.5YR 6/6), low plasticity, moist,
non-cohesive, (SAPROLITE)
(ML) SILT, stiff, red (7.5R 6/6) and reddish
yellow (7.5YR 6/6), low plasticity, moist,
non-cohesive, (SAPROLITE)
DE
P
T
H
(f
t
)
35
40
45
50
55
60
65
70
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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RE
C
O
V
E
R
Y

%
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(
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PAGE 2 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
SD - 8
SD - 9
SD -
10
Mn nodules, iron staining
Transition zone into micaceous saprolite
Bedrock split-spoon refusal at 195'
Micaceous material
115
95
107
(ML) SILT, stiff, red (7.5R 6/6) and reddish
yellow (7.5YR 6/6), low plasticity, moist,
non-cohesive, (SAPROLITE) (continued)
(ML) SILT WITH SAND, stiff, red (7.5R 6/6) and
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)
(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)
DE
P
T
H
(f
t
)
70
75
80
85
90
95
100
105
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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RE
C
O
V
E
R
Y

%
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i
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PAGE 3 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
50/3"
50/3"
50/2"
SD -
11
SD -
12
SD -
13
SS - 1
SS - 2
SS - 3
Driller hits hard material at 123'
Micaceous with foliation/no rock
110
101
36
3
3
2
(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)
(ML) SANDY SILT, hard, light grayish olive (10Y
6/2) and brownish yellow (10YR 6/8) and white
(8.5N), non-plastic, moist, non-cohesive,
(SAPROLITE)
(ML) SANDY SILT, hard, white (8.5N) with light
grayish olive (10Y 6/2), non-plastic, moist,
non-cohesive, (SAPROLITE)
(ML) SANDY SILT, hard, light grayish olive (10Y
6/2) and brownish yellow (10YR 6/6),
non-plastic, moist, non-cohesive, (SAPROLITE)
(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)
DE
P
T
H
(f
t
)
105
110
115
120
125
130
135
140
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
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K
RE
C
O
V
E
R
Y

%
SO
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Y

(
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)
DESCRIPTION
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PAGE 4 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
50/2"
50/3"
50/2"
SS - 4
SS - 5
SS - 6
2
3
2
(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)
(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)
(ML) SANDY SILT, hard/very dense, light
grayish olive (10Y 6/2) with white (8.5N),
non-plastic, moist, non-cohesive, (SAPROLITE)
DE
P
T
H
(f
t
)
140
145
150
155
160
165
170
175
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
C
K
RE
C
O
V
E
R
Y

%
SO
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Y

(
i
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)
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PAGE 5 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
50/1"
50/0"
50/0"
SS - 7
SS - 8
SS - 9
Core socket to 200' (very strong competent
rock at greater than 96-200')
1
0
0
(ML) SANDY SILT, hard/very dense, light
grayish olive (10Y 6/2) with white (8.5N),
non-plastic, moist, non-cohesive, (SAPROLITE)
(continued)
META-QUARTZ DIORITE, strong, white matrix
(8/4), with dark grayish green phenocrysts,
porphyritic, massive
DE
P
T
H
(f
t
)
175
180
185
190
195
200
205
210
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
C
K
RE
C
O
V
E
R
Y

%
SO
I
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O
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E
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Y

(
i
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)
DESCRIPTION
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PAGE 6 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Bottom of borehole at 218.0 feet.
DE
P
T
H
(f
t
)
210
215
BL
O
W
CO
U
N
T
S
(N

V
A
L
U
E
)
MONITORING
WELL
SA
M
P
L
E

T
Y
P
E
/
NO
.
/
C
O
R
E

R
U
N
REMARKS
RO
C
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O
V
E
R
Y

%
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Y

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PAGE 7 OF 7
BORING NUMBER GWA-14D
CLIENT Duke Energy
PROJECT NUMBER 269375
PROJECT NAME Riverbend Data Gap Assessment
PROJECT LOCATION Gaston, NC
NO
R
T
H

C
A
R
O
L
I
N
A

B
O
R
I
N
G

L
O
G

-

G
I
N
T

S
T
D

U
S

L
A
B
.
G
D
T

-

8
/
2
4
/
1
6

1
0
:
3
9

-

C
:
\
P
W
W
O
R
K
I
N
G
\
T
P
A
\
D
0
8
8
8
4
7
3
\
R
I
V
E
R
B
E
N
D

D
A
T
A

G
A
P

A
S
S
E
S
S
M
E
N
T
.
G
P
J
440 S. Church Street, Suite 900
Charlotte, NC 28202-2075
Phone: [phone]
hdrinc.com/follow-us
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 1 – GWA-14D: Sample SC-1 Depth: 0’ – 10.0’ Date: 02/08/16

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

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 5 – GWA-14D: Sample SC-5 Depth: 40.0’ – 50.0’ Date: 02/08/16

Photo 6 – GWA-14D: Sample SC-6 Depth: 50.0’ – 60.0’ Date: 02/08/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 11 – GWA-14D: Sample SC-11 Depth: 100.0’ – 110.0’ Date: 02/09/16

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

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 19 – GWA-14D: Sample SS-6 Depth: 165.0’ – 167.0’ Date: 02/11/16

Photo 20 – GWA-14D: Sample SS-7 Depth: 175.0’ – 177.0’ Date: 02/11/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

Photo 21 – GWA-14D: Sample SS-8 Depth: 185.0’ – 187.0’ Date: 02/12/16

Photo 22 – GWA-14D: Sample SS-9 Depth: 195.0’ – 197.0’ Date: 02/12/16
Duke Energy Carolinas, LLC | Riverbend Steam Station - CSA Groundwater Assessment
Appendix A, Sample Photographs
hdrinc.com 440 S Church Street, Suites 900 & 1000, Charlotte, NC 28202-2075
[phone]

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