Memo Geology 1971 Basin_Final_20190109

wood.
Memorandum
January 9, 2019
Subject: Subsurface Conditions at the Bottom of 1971 Ash Basin
L. V. Sutton Energy Complex
Wilmington, North Carolina
Wood Environment & Infrastructure Solutions, Inc. (Wood) has completed an independent review
of available geologic information obtained in and proximal to the 1971 Ash Basin. The 1971 Ash
Basin is located at the L.V. Sutton Energy Complex in Wilmington, North Carolina. The purpose
of this review has been to evaluate the nature of very dense materials located at the bottom of
the 1971 Basin. Our review has sought to determine the origin of these rocks and dense materials.
Specifically we wanted answer the question are the dense materials naturally occurring in place
geologic lithified deposits or are they materials that were placed in the 1971 Basin by man.
This independent review has been lead by Mr. Chris Pruneau a licensed professional geologist in
North Carolina who is a Senior Associate Geologist at Wood.
Information Sources Reviewed
Wood has conducted a background literature review of published geologic and hydrogeologic
reports for the area. A list of the publications is attached.
Wood has obtained subsurface information contained within reports authored by the firms
conducting the work. These references are attached to this memorandum. We have evaluated
the following information as part of the review:
• Geologic boring records from borings drilled within the 1971 Basin,
• Borings on the Duke Energy Sutton property proximal to the basin, and from sites located
outside of the Duke Sutton property that are within a one -mile radius of the 1971 Basin.
• Our review has placed emphasis on the subsurface information within or most proximal
to the 1971 Basin.
Boring logs reviewed were obtained for geotechnical investigations using standard geotechnical
methodologies (e.g. split -spoon sampling) and hydrogeologic/environmental investigations using
sonic drilling methods. The projects that generated the information we used in our review were
conducted under the oversight of a professional geologist or professional engineer licensed in
North Carolina. The borings utilized in our review were typically supervised in the field by a rig
geologist. Subsurface geologic samples were recovered using the split spoon and sonic methods
and described by a geologist or geotechnical engineer for the borings utilized.
Wood Environment & Infrastructure Solutions, Inc.
5710 Oleander Drive Suite 110
Wilmington, North Carolina 28403
Tel [phone]

January 9, 2019
In addition to the boring logs we have reviewed a side scanning sonar survey of the bottom of
the 1971 Basin and an underwater survey of the bottom conducted by professional divers in the
employ of Glenn Underwater, a professional diving service company. The divers observed the
bottom of the basin and used push rods to determine if rock was present in the base of the 1971
Basin.
Regional Geology of the 1971 Basin
One of the definitive geologic publications of the geology and hydrogeology of New Hanover
County, North Carolina Bain, (1970) indicates that at the approximate elevation of the bottom of
the 1971 Basin the Pee Dee Formation would be the naturally occurring geologic formation. The
Pee Dee is a very thick sequence (up to 700 feet) of largely marine deposited sediments. The
upper Pee Dee commonly contains zones of cemented sands that are considered to be lithified
enough to be considered rock. These zones of Pee Dee sandstone are widely occurring and
would be expected in the range of elevation of the bottom of the 1971 Basin.
Review of Existing Site and Nearby Geologic Borings
Geologic boring logs within the 1971 Basin and at the nearby plant facility indicate that sandstone
layers are present in most borings at the Sutton site. These sandstone layers were found beneath
the Duke Sutton site as shallow as elevation -36 feet and were commonly found to an elevation
of -53 feet. Rock has been hit and dredged from the bottom of the 1971 Basin from approximately
-37 feet elevation. The current dredged bottom of the 1971 Basin area is around -37 feet. The
sandstone and very dense layers of sand from the sonic borings which we interpret as sandstone
are consistent with the published lithologic descriptions of the Pee Dee sandstone including shell
fossils that occur in the sandstone.
Boring at the former PCS Nitrogen (now DH Griffin) site located just the southeast also indicate
the presence of the Pee Dee sandstone at similar elevations to where the sandstone is found at
Duke Sutton site. This suggest that the Pee Dee sandstone layers are widespread through the
area, which is also consistent with published reports.
Underwater Investigation of the 1971 Basin Bottom
The underwater dive inspection of the 1971 Basin bottom is attached to this memorandum. The
divers found the bottom of the basin to be covered in a thin layer of clayey material. The divers
probed the bottom of the Basin with push rods through the clayey material and found a hard layer
impenetrable surface at approximately -38.8 feet elevation.
Conclusions
Based on our review of the literature and the geologic borings from the Duke Sutton site, Wood is
of the opinion that the hard impenetrable layer found by the divers in the bottom of the 1971 Basin
at approximately -38.8 feet elevation is an in -place sandstone layer of the upper Pee Dee
Formation.
IIq/1 ot

wood.
0 0
REFERENCES
Bain, G. L., 1970, Geology and Ground -Water Resources of New Hanover County, North Carolina,
North Carolina Division of Ground Water.
Blasland, Bouck, & Lee, Inc. "MW-15D (FADA)", Progress Energy Carolinas, Inc., 2005
Geosyntec. Boring Log "LA-PZ-2", Duke Energy L.V. Sutton Onsite Landfill, 2015.
Geosyntec. Boring Log "LA-PZ-3", Duke Energy L.V. Sutton Onsite Landfill, 2015.
Geosyntec. Boring Log "LA-PZ-4", Duke Energy L.V. Sutton Onsite Landfill, 2015.
Geosyntec. Boring Log "LA-PZ-5", Duke Energy L.V. Sutton Onsite Landfill, 2015.
Law Environmental, Inc. "Report of Ground Water Remedial Investigation/ Feasibility Study", Nitrex,
Wilmington, NC, April, 1989.
LeGrand, H. E. Geology and Ground -Water Resources of Wilmington -New Bern Area, Division
of Ground Water, N.C. Dept. of Water Resources, 1960.
MACTEC, "UREA Tank and Fan Foundation", Sutton Steam Plant, New Hanover, County February
2005.
Synterra. Boring Log "CCR-109D", Duke Energy, Wilmington, NC, 2016.
Synterra. Boring Log "ABMW-01 D", Duke Energy, Wilmington, NC, 2015.
Synterra. Boring Log "AW-05D", Duke Energy, Wilmington, NC, 2015.
Synterra. Boring Log "AW-06D", Duke Energy, Wilmington, NC, 2015.

P:\Projects\CLIENTS\Duke Energy\_7810170919_Sutton_ Ash Remediation_Engineering Services\1971 Ash Pond\GIS\Boring Location Map.mxd, User: ben.moore; Date: 1/9/2019 1:54:38 PM, Checked By; XXX Date: XX/XX/XXXX

PROJECT: Sutton Plant
PROJECT NO: 1026.108
WELL / BORING
STARTED:
NORTHING:
NO: ABMW-01
3/28/15
198964.17
D
COMPLETED:
EASTING:
3/29/15
2305386.78
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV:
45.71 ft
M.P. ELEV:
45.71 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER: ft TOC
TOTAL DEPTH:
108.0 ft BGS
NOTES:
LOGGED BY:
P. Waldrep
CHECKED BY:
K. Fox
o
U
a 0
U
a-
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n
WELL
w
J
DESCRIPTION
Q
w
m
0
CONSTRUCTION
U`
(/)
O�
0
U
— Prn+ar4ivo
rocinn —ith
locking cap.
FLYASH, very fine grained, very dense, moist, dark
5 gray (GLEY1 4/1).
10 2" Sch. 40 threaded PVC
Riser
Same as above, denser with increased moisture to 14'
then dry -moist with wood fragments and lighter
coloration.
15
20
FLYASH, black, gray and white mottle becoming
laminated at 23', trace wood fragments, wet to 24' then
dry to moist.
25
30
FLYASH, very fine grained to silt -size, wet to saturated,
dark gray, occasionally black and white mottling soft to Grout
35', then dense, laminated. It
35
40
Same as above, wet -saturated, soft, slightly dense,
dense last 2'.
45
50 No recovery.
L7 CLIENT: co
SynTerra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
s)mTi dGreenville, 9Carolina 29601
erPhone:864 421 PAGE 1 OF 2

PROJECT: Sutton Plant
PROJECT NO: 1026.108
WELL / BORING
STARTED:
NORTHING:
NO: ABMW-01
3/28/15
198964.17
D
COMPLETED:
EASTING:
3/29/15
2305386.78
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV:
45.71 ft
M.P. ELEV:
45.71 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER: ft TOC
TOTAL DEPTH:
108.0 ft BGS
NOTES:
LOGGED BY:
P. Waldrep
CHECKED BY:
K. Fox
o
U
0 0
o_
0
p z
o f
WELL
w"
Q
DESCRIPTION
U o
J
d o
CONSTRUCTION
o
rr
D
<
W`
m0
No recovery. (continued)
Same as above, saturated, soupy.
No recovery.
FLYASH for --1' (same as above) with coal fragments
mixed with sand then silty sand, medium- fine to coarse
grained, medium dense, moderate to poorly sorted,
wet, light brownish grey (2.5Y 6/2) (79-82') then silty
sand, fine grained, well sorted, dense, wet, dark
greenish grey sand (GLEY 1 4/1), consolidated lense
(1") at 85'.
Same as above, silty, fine sand/sandy silt with rock
(highly weathered), dark greenish grey, dense,
saturated, well sorted.
Bentonite seal
Sand Pack
2" pre -packed well screen
L� CLIENT: co
SynTerra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
synTeraGreenville,999 ling 29601
rPhone:864 421 9PAGE 2 OF 2

0
PROJECT: Sutton Plant
WELL / BORING NO: AW-OJD
PROJECT NO: 1026.108
STARTED: 5/9/15 COMPLETED: 6/10/15
NORTHING: 198024.76 EASTING: 2308125.18
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV: 23.78 ft M.P. ELEV: 23.78 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER: ft TOC TOTAL DEPTH: 100.0 ft BGS
NOTES:
LOGGED BY: P. Waldrep CHECKED BY: K. Fox
a$
U
a 0
d
0
0 z
o f
WELL
wo �'
DESCRIPTION
Q
w`
m 0
a s
CONSTRUCTION
U
U)
U
f
locking cap.
SIP
SAND, silty, medium to fine grained, well -sorted,
medium density, light red -brown, moist.
5
10
SP
Same as above, medium brown, wet.
15
20
2" Sch. 40 threaded PVC
SP
Same as above.
Riser
25
SAND silty with quartz pebbles, coarse to medium fine
SW
grain, poorly sorted, medium density, light brown -gray
with red quartz, wet.
30
SW
Same as above with abundant quartz pebbles at
31-32'.
35
40
Grout
SW
Same as above.
45
SAND, silty, medium -fine grained, dense, wet,
SW
moderately -sorted, white, 2" silt/clay lens at 52'
50
becoming reddish -yellow and coarse grained at 56'.
CLIENT: co
SynTerra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
Greenville,999 ling 29601
�T�
erPhone:864 421 9PAGE 1 OF 2

9
PROJECT: Sutton Plant
WELL / BORING NO: AW-05D
PROJECT NO: 1026.108
STARTED: 5/9/15 COMPLETED: 6/10/15
DRILLING COMPANY: Cascade Drilling
NORTHING: 198024.76 EASTING: 2308125.18
DRILLING METHOD: Sonic
G.S. ELEV: 23.78 ft M.P. ELEV: 23.78 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER: ft TOC TOTAL DEPTH: 100.0 ft BGS
NOTES:
LOGGED BY: P. Waldrep CHECKED BY: K. Fox
a
ULu
a 0
U
a
O o
co
0 z
o Q
WELL
w
< J
�
DESCRIPTION
Q
w �-
m 0
a
CONSTRUCTION
SAND, silty, medium -fine grained, dense, wet,
moderately -sorted, white, 2" silt/clay lens at 52'
SW
becoming reddish -yellow and coarse grained at 56'.
(continued)
55
60
65
SAND, silty, medium -fine grained with trace quartz
gravel, poorly sorted, dense, wet, light - medium gray,
SW
9" lens of coarse sand from 60-60.9' then silty sand,
SM
medium -fine grained, well -sorted, dense, wet light
green then silty sand/sand-with-silt very dense,
well -sorted, saturated with large shells (>3") at 64',
trace shell to 77'.
70
75
80
85
Bentonite seal
Same as above with 3' lens of
SM
sandstone/semiconsolidated sand at 82' and very
dense sand lens (1') at 92'.
90
Sand Pack
95
2" pre -packed well screen
SM
Same as above increased fines with depth, slightly
plastic at base.
100
CLIENT: co
SynTerra
L7
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
Carolina 29601
erPhone:864 421 PAGE 2 OF 2
s)mTraGreenville, 9

0
PROJECT: Sutton Plant
WELL / BORING NO: AW-06D
PROJECT NO: 1026.108
STARTED: 1/29/15 COMPLETED: 1/31/15
NORTHING: 199642.47 EASTING: 2307502.47
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV: 17.48 ft M.P. ELEV: 17.48 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER: ft TOC TOTAL DEPTH: 127.0 ft BGS
NOTES:
LOGGED BY: P. Waldrep CHECKED BY: K. Fox
W v
U
IL0
O
U
j
DESCRIPTION
a
Q
�
O^
w
�z
m �
U
� E
a s
WELL
CONSTRUCTION
f
SIP
SAND, silty, medium fine grained, well sorted, light
brown to gray.
locking cap.
5
SP
Same as above, light reddish brown, moist to wet.
10
SP
SAND, silty, medium to fine grained, well sorted, light
brown to tan, dense, wet.
15
20
SP
Same as above with quartz grains (pebble) and small
gravel seam at 19'.
25
30
SP
Same as above, increasing silt, silt lens at 30' and 6"
gravel lens as 33'.
35
SW
SAND, silty, medium to fine grained, medium density,
poorly to moderately sorted, light gray, tan, wet.
40
SW
SP
SAND, coarse grained with small gravel, light grey to
reddish brown, loose to slightly dense, saturated.
Poorly sorted.
45
Grout
SW
SAND, coarse with fine gravel and silt, light orange -red,
for 1', then grading to dark gray, dense, wet, poorly
2" Sch. 40 threaded PVC
Riser
sorted.
50
SM
CLIENT: co
SynTerra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
Greenville,999 ling 29601
�T�
erPhone:864 421 9PAGE 1 OF 3

0
PROJECT: Sutton Plant
WELL / BORING NO: AW-06D
PROJECT NO: 1026.108
STARTED: 1/29/15 COMPLETED: 1/31/15
NORTHING: 199642.47 EASTING: 2307502.47
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV: 17.48 ft M.P. ELEV: 17.48 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER: ft TOC TOTAL DEPTH: 127.0 ft BGS
NOTES:
LOGGED BY: P. Waldrep CHECKED BY: K. Fox
a$
U
a 0
a
O F
0 z
o_ E
WELL
wo �'
D
DESCRIPTION
Q
w`
m 0
o n
CONSTRUCTION
U)
U
SAND, silty, very fine-grained with some clay, well
SM
sorted, dense, wet to saturated, increasing fines with
55
depth. (continued)
60
SILT, sandy and silty, stiff to very stiff occasionally
MIL
consolidated, dark green, wet to saturated. (6" dry lens
at 65').
65
70
MIL
Same as above, wet to saturated.
75
80
ML
Same as above, wet.
85
90
ML
Same as above, becoming clayey at 95'.
Bentonite seal
95
MIL
Same as above, increased fines, increased stiffness,
100
decreased moisture, trace shell.
CLIENT: co
SynTerra
L�
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
South 99 ling 29601.syn
Terra
Phone:Greenvl864 421 99lle,
PAGE 2 OF 3

9
PROJECT: Sutton Plant
WELL / BORING NO: AW-06D
PROJECT NO: 1026.108
STARTED: 1/29/15 COMPLETED: 1/31/15
DRILLING COMPANY: Cascade Drilling NORTHING: 199642.47 EASTING: 2307502.47
DRILLING METHOD: Sonic G.S. ELEV: 17.48 ft M.P. ELEV: 17.48 ft
BOREHOLE DIAMETER: 6 IN DEPTH TO WATER: ft TOC TOTAL DEPTH: 127.0 ft BGS
NOTES: LOGGED BY: P. Waldrep CHECKED BY: K. Fox
a
ULu
a 0
U
a
O o
co
0 z
0 Q
WELL
w
< J
�
DESCRIPTION
Q
w �-
m 0
a Q
CONSTRUCTION
anPack
105
MILSame
as above, increased fines, increased stiffness,
decreased moisture, trace shell. (continued)
2" pre -packed well screen
110
MIL
Same as above, increasing stiffness.
115
SC
Semi -consolidated, hard 2' lens, silty fine sand, dry.
120
ML
SILT, sandy, clayey, low plasticity, moderately stiff,
dark green, moist to wet.
125
Boring terminated. Backfill boring with cuttings to 108'
to set well.
130
135
140
145
150
CLIENT: co
SynTerra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
��i.� Greenville, South Carolina 29601
IS Phone:[phone] PAGE 3 OF 3

PROJECT: L.V. Sutton Energy Complex
WELL / BORING NO: CCR-109D
PROJECT NO: 1026.208
STARTED: 5/17/16 COMPLETED: 5/18/16
NORTHING: 199534.988 EASTING: 2304321.593
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV: 11.69 ft M.P. ELEV: 14.77 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER:6.32 ft TOC TOTAL DEPTH: 100.0 ft BGS
NOTES: SAA = Same As Above
I LOGGED BY: B. Wylie CHECKED BY: J. Gilmer
=
^
U
= 0
v
J
o-
O^
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O z
o f
WELL
CONSTRUCTION
o-
w0-
a 0
DESCRIPTION
0 o
D
mO
a
o a
�j
<
�
SP
SAND, light brown to dark brown and black,
100
5
medium -grained.
_ 2" Sch. 40 threaded PVC
riser
10-
No Recovery
0
15-
20-
..
SP
SAND, light brown, medium with coarse grains near
100
25_
_
bottom of interval.
30
100
35
! SP
SAND, light brown, medium to coarse, wet.
Grout (0-87.75')
100
45 -
50-
i
SP
SM
SAND, dark gray, fine, silty, dense and wet.
100
55
CLIENT: Duke Energy Progress, LLC
SynTerra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
nTerra Greenville, South Carolina 29601
PAGE 1 OF 2
Phone: [phone]

PROJECT: L.V. Sutton Energy Complex
WELL / BORING NO: CCR-1 09D
PROJECT NO: 1026.208
STARTED: 5/17/16 COMPLETED:. 5/18/16
NORTHING: 199534.988 EASTING: 2304321.593
DRILLING COMPANY: Cascade Drilling
DRILLING METHOD: Sonic
G.S. ELEV: 11.69 ft M.P. ELEV: 14.77 ft
BOREHOLE DIAMETER: 6 IN
DEPTH TO WATER:6.32 ft TOC TOTAL DEPTH: 100.0 ft BGS
NOTES: SAA = Same As Above
LOGGED BY: B. Wylie CHECKED BY: J, Gilmer
U
= c9
C
W
a
>O ^
cn
z
OJ
o f
WELL
CONSTRUCTION
W$
a 0
<J
DESCRIPTION
Q
U
W
Coo
a s
O
U)
U
SP
SM
SAND, dark gray, fine, silty, dense and wet. (continued)
100
65—
SILTSTONE fine- rained.
70—
SP
SM
SAND, dark gray, fine with silt, dense and wet.
100
75
SAND, gray, fine, silty, dense, dry.
SP
SM
80
No Recovery
0
85
- Bentonite (82.75'-87')
g0
, Sand Pack (87'-100')
95
SP
SM
SAND, dark gray, fine, silty, dense.
100;:F:
2" Pre -packed well screen
h 'y (90'-100')
E:
100
105—
110
115—
CLIENT: Duke Energy Progress, LLC
ra
148 River Street, Suite 220 PROJECT LOCATION: Wilmington, NC
148 River
���-ra Greenville, South Carolina 29601
PAGE 2 OF 2
Phone:[phone]

Geosyntec ° Geosyntec Consultants
1300 South Mint St. Suite 410
cony Ita nts Charlotte, NC 28203
GENERAL INFORMATION
PROJECT NAME:L.V. Sutton Onsite Landfill
PROJECT NO: GC5770
SITE LOCATION: Wilmington, North Carolina
BORING DATE: 211112015
GEOSYNTEC REPRESENTATIVE:Michael Martin
DRILLING CONTRACTOR:Mid-Atlantic Drilling
DRILLER NAME: William Wiggins
w x j Lithologic Description Co,
z � a
BORING LOG
BOREHOLE ID:LA-PZ-2
TECHNICAL INFORMATION
DRILLING METHOD:Mud Rotary
RIG TYPE: CME 45C Track Rig (Serial # 273964)
BOREHOLE DIA:4"
SAMPLING METHOD:SPT with Split Spoon
NORTHING:201637.48
EASTING: 2306475.92
GROUND ELEVATION:26 ft (NAVD88)
Z
o N-Value o Comments
Q U
l0 20 30 40 50
TOP SOIL; black; moist; very soft
o .
25
Fine to medium grained SAND (SP) (Surficial
Aquifer); brown; moist; very loose
o 'o
1-1-1-1
1.2
Fine to medium grained SAND (SP) (Surficial
p
MC=5.1
Aquifer); brown; moist; very loose
o. ' 0.
1-2-2-2
1.5
_5
Fine to medium grained SAND (SP) (Surficial
Aquifer); light brown; moist; loose
p
o. !o.
1.5
1-2-3-2
20
Fine to medium grained SAND (SP) (Surficial
Aquifer); brown; moist; loose
a
o !0
1.5
MC=5.0%
2-3 4-5
'.
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; medium dense
o
° °
1.2
Start using mud at 8.5 ft
bgs
4-6-7
-10
a
15
:::::
o. '0.
a
o. !o.
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; medium dense
5-9-15
0.9
10
a
Grout
a
::::::
o. !°.
Fine to medium grained SAND (SP) (Surficial
o .
roll
Aquifer); tan; wet; loose
o !0
4-4-4
20
5
a.
o. !°.
O
Fine to medium grained SAND (SP) (Surficial
Aquifer); light gray; wet; medium dense
1.0
Gravel=0.0%, Sand=95.8%,
FC=4.2 % ; SG=2.702
8-12-16
!°.
0
O
° °
Lose drilling fluid at 28 ft
bgs
6-10-14
Fine to coarse grained SAND (SP) (Surficial Aquifer);
tan; wet; medium dense
0.9
-30
(Continued Next Page)
All depths referenced to ground surface. Page 1 of 2
Total Depth: 50 ft bgs engineers I scieudsts I innovators

Geosynte& Geosyntec Consultants
BORING LOG
1300 South Mint St. Suite 410
consultants Charlotte, NC28203
BOREHOLEID:LA-PZ-2
GENERAL INFORMATION
TECHNICAL INFORMATION
PROJECT NAME:L.V. Sutton Onsite Landfill
DRILLING METHOD:Mud Rotary
PROJECT NO: GC5770
RIG TYPE: CME 45C Track Rig (Serial # 273964)
SITE LOCATION: Wilmington, North Carolina
BOREHOLE DIA:4"
BORING DATE: 211112015
SAMPLING METHOD:SPT with Split Spoon
GEOSYNTEC REPRESENTATIVE:Michael Martin
NORTHING:201637.48
DRILLING CONTRACTOR:Mid-Atlantic Drilling
EASTING: 2306475.92
DRILLER NAME: William Wiggins
GROUND ELEVATION:26 ft (NAVD88)
x
Lu a
o
Litholo is Description
ion
a
N-Value
z
>
Comments
aConWstrucl
mo
0
Z
10 20 30 40
50
-5
Bentonite
Seal
Gravel was observed in
Filter
return fluid at 33 ft bgs
Fine to coarse grained SAND (SP) (Surficial Aquifer);
Pack
Gravel=0.5%, Sand=97.5%,
tan; wet; loose
(Sand)
4-4-4
1.0
FC=2.0%
-35
-10
Fine to medium grained SAND (SP) (Peedee
Aquifer); trace clay; gray; wet; loose
3-3-5
0.8
-40
Screen
15
Fine to medium grained SAND (SP) (Peedee
Aquifer); gray; wet; loose
2-2 4
0.5
-45
-20
Lose drilling fluid at 48.5 ft
Fine to medium grained SAND WITH CLAY (SP-SC)
bgs
(Peedee Aquifer); gray and orange; wet; medium
5-7-9
0.7
Gravel=0.0%, Sand=94.3%,
dense
n o Boring a feetbgs.
Silt=1.8%, Clay=3.9%,
FC=5.7%; SG=2.685
-50
All depths referenced to ground surface. Page 2 of 2
Total Depth: 50 ft bgs engineers I scieudsts I innovators

Geosy j tec D Geosyntec Consultants BORING LOG
1300 South Mint St. Suite 410
consultants Charlotte, NC 28203 BOREHOLE ID:LA-PZ-3
GENERAL INFORMATION TECHNICAL INFORMATION
PROJECT NAME: L.V. Sutton Onsite Landfill DRILLING METHOD:MudRotary
PROJECT NO: GC5770 RIG TYPE: CME 45C Track Rig (Serial # 273964)
SITE LOCATION: Wilmington, North Carolina BOREHOLE DIA:4"
BORING DATE: 211312015 SAMPLING METHOD:SPT with Split Spoon
GEOSYNTEC REPRESENTATIVE:Michae/ Martin NORTHING: 200553.67
DRILLING CONTRACTOR:Mid-Atlantic Drilling EASTING: 2306698.53
DRILLER NAME: William Wiggins GROUND ELEVATION:22.7 ft (NAVD88)
a
�Well a Litholo is Description j cion m -Value >
w WConstru� N Comments
o
Z 10 20 30 40 50 N
of
TOP SOIL; black; moist; soft
Fine to medium grained SAND (SP) (Surficial
Aquifer); brown; moist; very loose
o .
j.
1-2-1-1
1.7
MC=9.1
20
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; moist; very loose
o
o. 'o.
j.
1.5
2-2-2-2
_5
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; moist; very loose
p
o !o.
1.6
MC=4.1
2-1-3-2
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; moist; loose
o
o !0
1.7
Gravel=0.0%, Sand=99.2%,
FC=0.8%; SG=2.665
2-3-3-4
15
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; loose
o
° °
i
3-4-5
0.9
Start using mud at 8.5 ft
bgs
-10
a
o. !o.
10
a
°. !o.
Fine to medium grained SAND (SP) (Surficial
-15
Aquifer); tan and orange; wet; medium dense
a
o. !o.
Grout
9-12-15
0.9
a
o. !o.
5
Fine to medium grained SAND (SP) (Surficial
o .
Aquifer); tan; wet; medium dense
o ! 0
8-11-15
0.9
20
i
a
o. !o.
0
a
o. !o.
9-14-18
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; dense
1.1
-25
a .
o. !o.
a
5
°' 10
Bent onite between 29 and
Fine to coarse grained SAND (SP) (Surficial Aquifer);
33 ft bgs may contain
tan and orange; wet; medium dense
cave-in native soils
30
L
(predominantly sand)
(Continued Next Page)
All depths referenced to ground surface. Page 1 of 2
Total Depth: 50 ft bgs engineers I scientists I innovators

Geosyntee° Geosyntec Consultants
BORING LOG
1300 South Mint St. Suite 410
consultants Charlotte, NC 28203
BOREHOLE ID:LA-PZ-3
GENERAL INFORMATION
TECHNICAL INFORMATION
PROJECT NAME:L.V. Sutton Onsite Landfill
DRILLING METHOD:MudRotary
PROJECT NO: GC5770
RIG TYPE: CME 45C Track Rig (Serial # 273964)
SITE LOCATION: Wilmington, North Carolina
BOREHOLE DIA:4"
BORING DATE: 211312015
SAMPLING METHOD:SPT with Split Spoon
GEOSYNTEC REPRESENTATIVE:Michael Martin
NORTHING: 200553.67
DRILLING CONTRACTOR:Mid-Atlantic Drilling
EASTING: 2306698.53
DRILLER NAME: William Wiggins
GROUND ELEVATION:22.7 ft (NAVD88)
w
Description
Litholo is Descri tion
Well
Construcio
N-Value
o
Comments
z
10 20 30 40
50 N
of
Bentonite
Seal
Gravel was observed in
return fluid at 32 ft bgs
-10
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; medium dense
3-6-7
0.8
35
Filter
Pack
(Sand)
-15
Fine to medium grained SAND (SP) (Peedee
Aquifer); greenish gray; wet; medium dense
6-5-6
0.8
40
Screen
-20
Fine to medium grained SAND (SP) (Peedee
Grt=2.5 , Cl S 1.3%, .4%,
Silt=2.5%, Clay=1.3%,
Aquifer); greenish gray; wet; medium dense
5-10-12
1.0
FC=3.8
45
Lose drilling fluid at 45 ft
bgs
-25
5-5-3
Fine to coarse grained SAND (SP) (Peedee Aquifer);
1.1
greenish gray to orange; wet; loose
LLLLIs
Wood was observed in the
50
End of Boring at 50.0 feet bgs. lit spoon at 50 ft bgs
All depths referenced to ground surface. Page 2 of 2
Total Depth: 50 ft bgs engint�eN i scientists i innovators

Gees j`� teC D Geosyntec Consultants
J _ _ 1300 South Mint St. Suite 410
consultants Charlotte, NC 28203
GENERAL INFORMATION
PROJECT NAME:L.V. Sutton Onsite Landfill
PROJECT NO: GC5770
SITE LOCATION: Wilmington, North Carolina
BORING DATE: 211612015
GEOSYNTEC REPRESENTATIVE:Michael Martin
DRILLING CONTRACTOR:Mid-Atlantic Drilling
DRILLER NAME: William Wiggins
oD
w j Lithologic Description Ti-C
z
BORING LOG
BOREHOLE ID:LA-PZ-4
TECHNICAL INFORMATION
DRILLING METHOD:Mud Rotary
RIG TYPE: CME 45C Track Rig (Serial # 273964)
BOREHOLE DIA:4"
SAMPLING METHOD:SPT with Split Spoon
NORTHING: 199963.74
EASTING: 2306964.3
GROUND ELEVATION:18.6 ft (NAVD88)
z
n o N-Value o Comments
m V
a 10 20 30 40 s0
TOP SOIL; black; moist; soft
o .
Fine to medium grained SAND (SP) (Surficial
0 '0
1-1-2-1
1.8
Aquifer); brown and tan; moist; very loose
Fine to medium grained SAND (SP) (Surficial
p
MC=6.4%
Aquifer); brown and tan; moist; very loose
0 '0
1-2-2-2
1.6
15
Fine to medium grained SAND (SP) (Surficial
p
-5
Aquifer); brown; moist; very loose
'0. !o
2-1-3-2
1.6
Fine to medium grained SAND (SP) (Surficial
p
MC=20.8%; Gravel=0%,
Aquifer); tan; wet; loose
o !0
2-3-3-3
1.4
Sand = 97.5%, FC=2.5%,
Start using mud at 8.5 ft
10
Fine to medium grained SAND (SP) (Surficial
0 0
bgs
Aquifer); tan and orange; wet; loose
6-5-5
0.9
-10
a
0 !o
a
o !o
5-Fine
to medium grained SAND (SP) (Surficial
Aquifer); tan to black; wet; medium dense; possible
6-5-9
1.1
15
organic soil
o .
0 !o
O
o !o
Grout
0
Fine to medium grained SAND (SP) (Surficial
o .
Aquifer); tan; wet; medium dense
0. !o
7-12-14
1.1
-20
a
o !o
a
5
Fine to coarse grained SAND (SP) (Surficial Aquifer);
0. 0
Grt=1.5 Cl S 0.8%, .7%,
Silt=1.5%, Clay=0.8%,
tan; wet; medium dense
7-8-8
1.3
,
FC=2.3%
0 !o
Grout between 19 and 34 ft
bgs may contain cave-in
o.
native soils (predominantly
sand)
0. !0.
-10
Fine to coarse grained SAND (SP) (Surficial Aquifer);
tan; wet; loose.1
0
30
'.
(Continued Next Page)
All depths referenced to ground surface. Page 1 of 2
Total Depth: 50 ft bgs engineers 4 scientists i innovators

Geosyntee° Geosyntec Consultants
BORING LOG
1300 South Mint St. Suite 410
consultants Charlotte, NC 28203
BOREHOLE ID:LA-PZ-4
GENERAL INFORMATION
TECHNICAL INFORMATION
PROJECT NAME:L.V. Sutton Onsite Landfill
DRILLING METHOD:MudRotary
PROJECT NO: GC5770
RIG TYPE: CME 45C Track Rig (Serial # 273964)
SITE LOCATION: Wilmington, North Carolina
BOREHOLE DIA:4"
BORING DATE: 211612015
SAMPLING METHOD:SPT with Split Spoon
GEOSYNTEC REPRESENTATIVE:Michae/ Martin
NORTHING:199963.74
DRILLING CONTRACTOR:Mid-Atlantic Drilling
EASTING: 2306964.3
DRILLER NAME: William Wiggins
GROUND ELEVATION:18.6 ft (NAVD88)
x j
w ,.,Q
v
o
Lithologic Description
a
Well
Construction
d o
rn m
N-Value
z
>
o
Comments
Z
o 0
O
p.
10.
O
_18
Fine to coarse grained SAND (SP) (Surficial Aquifer);
0.
'o
tan; wet; loose
2-2-5
1.0
-35
Bentonite
Seal
-20
Fine to medium grained SAND (SP) (Surficial
Filter
Aquifer); tan; wet; medium dense
Pack
4-6-8
1.1
40
(Sand)
-25
Fine to medium grained SAND (SP) (Peedee
Aquifer); tan to greenish gray; wet; medium dense
3-5-10
1.1
-45
Screen
-30
Fine to coarse grained SAND (SP) (Peedee Aquifer);
:'
1.3
Glt=1.4 , %, S 0.7%, .6%,
Silt=1.1
6-5-6
greenish gray to orange; wet; medium dense
FC=2.1%; SG=2.693
%; SG=2Clay. 93
End of Boring at 50.0 feet bgs.
All depths referenced to ground surface.
Total Depth: 50 ft bgs
Page 2 of 2
engineers I scientists I innowatars

Geosy `1 teG D Geosyntec Consultants
1300 South Mint St. Suite 410
consultants Charlotte, NC 28203
GENERAL INFORMATION
PROJECT NAME: L.V. Sutton Onsite Landfill
PROJECT NO:GC5770
SITE LOCATION: Wilmington, North Carolina
BORING DATE: 211212015
GEOSYNTEC REPRESENTATIVE:Michae/ Martin
DRILLING CONTRACTOR:Mid-Atlantic Drilling
DRILLER NAME:Malcolm Coogan
ip
wx j v Lithologic Description T15C
zCI
BORING LOG
BOREHOLE ID:LA-PZ-5
TECHNICAL INFORMATION
DRILLING METHOD:Mud Rotary
RIG TYPE: CME 45B Track Rig (Serial # 221904)
BOREHOLE DIA:3"
SAMPLING METHOD:SPT with Split Spoon
NORTHING: 198148.1
EASTING: 2307616.62
GROUND ELEVATION:22 ft (NAVD88)
a
n o N-Value o Comments
m V
0 10 20 30 40 50 N
of
TOP SOIL; black; moist; medium stiff
Fine to medium grained SAND (SP) (Surficial
Aquifer); brown; moist; loose
o .
o ' o
j.
2-2-3-3
1.8
MC=6.4%
20
Fine to medium grained SAND (SP) (Surficial
o
Aquifer); brown; moist; very loose
o. 'o
j.
3-2-2-3
4
1.5
5
Fine to medium grained SAND (SP) (Surficial
Aquifer); brown; moist; loose
o
o '0
j.
1.8
MC=5.7%; Gravel=0.0%,
Sand=95.8%, Silt=2.5%,
Clay=1.7%, FC=4.2%
3-2-3-5
15
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; moist; loose
p
o !0
4
1.4
3-2-3-4
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; moist; loosen
o
!o
1.6
4-4-5-6
---to
Start using mud at 10 ft bgs
a
o. !o.
10
a
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; medium dense
5-10-10
1.0
15
a
o. !o.
5
a
0. ,o
Grout
Fine to medium grained SAND (SP) (Surficial
o .
rl
Gravel=0.0%, Sand=98.2%,
Aquifer); tan; wet; medium dense
o !0
8-9-9
21FC=1.8%
-20
a
0
i
a
o. !o.
9-12-17
Fine to coarse grained SAND (SP) (Surficial Aquifer);
tan; wet; medium dense
0.9
o. !o.
_5
o
o !o
Grout between 27 and 35.5
ft bgs may contain cave-in
native soils (predominantly
sand)
7-6-5
Fine to coarse grained SAND (SP) (Surficial Aquifer);
tan and orange; wet; medium dense
0.6
30
�.
(Continued Next Page)
All depths referenced to ground surface. Page 1 of 2
Total Depth: 50 ft bgs engineers I scientists I innovators

Geosynj tec � Geosyntec Consultants
_ _
BORING LOG
1300 South Mint St. Suite 410
consultants Charlotte, NC 28203
BOREHOLE ID:LA-PZ-5
GENERAL INFORMATION
TECHNICAL INFORMATION
PROJECT NAME:L.V. Sutton Onsite Landfill
DRILLING METHOD:MudRotary
PROJECT NO: GC5770
RIG TYPE: CME 45B Track Rig (Serial # 221904)
SITE LOCATION: Wilmington, North Carolina
BOREHOLE DIA:3"
BORING DATE: 211212015
SAMPLING METHOD:SPT with Split Spoon
GEOSYNTEC REPRESENTATIVE:Michael Martin
NORTHING: 198148.1
DRILLING CONTRACTOR:Mid-Atlantic Drilling
EASTING: 2307616.62
DRILLER NAME:Malcolm Coogan
GROUND ELEVATION:22 ft (NAVD88)
w �a
o
Litholo is Description
g P
a
Well
Construction
a o
m
N-Value
>
o
Comments
Z
10 20 30 40
50 N
of
0
0. !o.
a
0. !o.
Fine to medium grained SAND (SP) (Surficial
Aquifer); tan; wet; medium dense
5-6-7
0.1
35
0
Bentonite
Seal
-15
Filter
Fine to coarse grained SAND (SP) (Peedee Aquifer);
Pack
( Sand)
FC=1.3%
tan; wet; very loose
2-2-2
0.7
-40
-20
Lose drilling fluid at 42 ft
bgs
Fine to medium grained SAND (SP) (Peedee
FC=2.0
Aquifer); olive and gray; wet; very loose
Screen
2-1-1
0.5
45
-25
Clayey SAND (SC) (Peedee Aquifer); dark gray; wet;
1.4
Gravel=0.0%, Sand=62.6%,
3-3-5
loose; mixed with organic soil/wood
FC=37.4%
End of Boring at 50.0 feet bgs.
All depths referenced to ground surface.
Page 2 of 2
Total Depth: 50 ft bgs
engint�ets i scientists i innovators

Drilling Company: Parratt Wolffe
Driller's Name: Arnold Chapel
Drilling Method: Mud Rotary
Bit Size: 5.87-Inch roller -bit
Auger Size:
Rig Type: B-61 Mobile Rig
sampling Method: 24-Inch splitspoon
Northing: 196476.98
Easting: 2306061.06
Casing Elevation: 11.21
Borehole Depth: 48 ft bgs
Surface Elevation: 8.61
Logged by. Brian Lovgren
Client: Progress Energy Carolinas Inc.
Location: Progress Energy L.V. Sutton Steam
Electric Plant
Wilmington, NC
y
+
d
E
�
Well/Boring
a��i
�,
U
Stratigraphic Description
Construction
_o
a,
E
Q
O.
f0
>
Q
QV�
_O
W
W
m
�
Z
Q
d
p
UJ
protective above
10
ground steel casing
(+2.6'-0.V)
0
Cement pad (2'x2') -
Topsoil, high organic content, slightly damp to damp, no odor.
SAND (SM), gray, fine to medium grained, loose, moist to wel, no odor.
.w
2anch SCH 40
;.; ;•
PVC riser
(40.0' -+2.5)
SAND ISM), gray, fine to medium grained, loose, wet, no odor.
g:r
Bentonite grout
S
° `'
(35.5- - 0.0')
2.0'
4
6
0.0
.Y t$
SAND (SM), light gray, mottled white, fine to medium grained, loose, wet,
5
no odor.
5
SAND (SM), dark brown, fine grained, loose, wet, no odor.
2.0' 4 7 0,06-Inch nominal
3 borehole
10 5 s' (45.0'-0.0q
SAND (SM), tan, flne grained, loose, wet, no odor.
1.0' 2 2 1.0 :.;'3
-S 1 SAND (SM), ten, floe to medium grained, very loose, wet, no odor.
1.2' 9 25 0.0 a
Z O 12 :•j aj SAND (SM), tan, fine to medium grained, medium dense, wet, no odor.
13
13 y,
20 Ks PVC dserH 40
v i : (40.0' - +2.5')
0.8 1
3 6 0.0 ? SAND (SM), tan, fine to coarse grained, loose, wet, no odor.
-IS 3 BBFA','•',
L
Remarks: Water Level Data
NA: Not Applicable
ff bgs: feet below ground surface Date Depth Elev.
PID: Photolonization Detector --
NR: No Recovery 2/4/05 3.13 8.08
BLASLAND, BOU X & LEE, INC.
engineers, scientists, economists
epth measured from lop of casing'
Project: 04015 Template:boring_weilWL2005.idf Page: 1 of2
Data File:MW-15D Date:3/16105

Client:
Progress Energy Carolinas Inc.
Site Location*
Progress Energy
L.V. Sutton Steam
Electric Plant
Well/Baring 10: MWA 51) (FADA)
Borehole Depth, 48 ft bgs
E
E
z
z
C
s
o
ck
o
Well/Boring
0
CE,
—E
4)
Stratigraphic Description
Construction
CL
W -J
W
co
U)
co
IX
IM•
22
—2S
Bentonite grout
(35.6-0.0')
III
-� f.
0.8'
3
6
0.0
4%:
-20-
3
3
4
30
1,
6-inch nominal
borehole
(45.0'-0.0')
1%
SAND (SM), tan, fine to coarse grained, medium dense, wet, no odor.
-25-
1.01
5
8
is
0.0
11
13
—3S
Bentonite chips
-30-
1.01
10
1 i
is,
0.0
;I (38.0'-35.S)
SAND (SM). brown, mottled orange, one to coarse grained, medium
14
dense. wet. no odor.
r.
Well Gravel Pack
—40
N. 2
(4o6.01- 38.0-)
SAND (SM). brown, fine to coarse grained, medium dense, wet, no odor.
'Fit 'A
MM.
v2'
1.2'
3
6
0.0
;--P:% uuai 2-inch 0.010 slot
PVC screen
= tty
• SAND (SM). brown, mottled orange, fine to coarse grained, loose, wet, no
-35 -
2
4
odor.
i. s (45.0- -40.0')
3
SAND (SM). dark gray, slit to fine fine grained, very dense, wet, no odor.
45
1.2'
24
79
0.0
1.64nch nominal
45
borehole
34
H!,
(48.0 -45.0
NR
Natural Collapse
BBL
BLASLAND, BOUCK & LEE, INC.
engineers, scientists, economists
Remarks:
NA: Not Applicable
ft bgs: feet below ground surface
PID: Photolonizatlon Detector
M No Recovery
Project: 04015 Template:boring_.yvellWL2005.ldf
Data File-MW-M Date: 3116/05
Water Level Data
Date Depth Elev.
2/4/05 3.13 8.08
lepth measured from top of casing*
Page: 2 of 2
D

11IluaE1:1 Nitrex PIEQJLCT No _ 59-8518 __ 111OHING. L-1A_.__
® IOATL
A
1-17-89 IDIIILLER Skipper's CRFW• Tim & Scott SURFACE ELEV 27.01 t
IILI]N
IAOY to
SOIL SINAI^
tlMl
TVI[
NO
MITN /IN}7
S"
}NO
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}AD
i
ASI
S0ISOS SCAII\SON AND ASYAAAS
1110Y
TO
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S'
an r wn fine o me ium san
omb
5'
10'
10'
15'
sang merium san i e line
15'
20'
"
20'
25'
ii�1°reui�t �na o e ium sal}
25'
30'
'
30'
35'
w i e me sum o coarse an
35'
45 '1
"LLJ
.'
48'
me si t - ceerd'ineSer'ave '
48'
•49'
gray sandstone fragments
End of Borina at 49.1 ft
Pack = natural sand
Bentonite pellets from 18.0 to
19.0 ft
1
Well developed with compressed
air. Flow - 25 gpm
Static - 21.0 T B.G.
Id
Total well length 49.10 ft.
33.9 ft casing (PVC) 15.0 ft No.
10 slot PVC screen
METHOD OF DRILLING (Check Owl
WEATHER
1, AUGER HSA SIZE 2. 5" I.D.
NOWORILLING TIME I1416.1
b WASH WATER MUD
BORING LAYOUT
MOVING
BORINGSIZE 6 inch SIT USED auger bit
HAULING WATE II
STANDBY
1 ASING SIZE 2 inch I.D-LENGTH 33.9I 15
screerWATER LEVEL P
DATE TIME
UNDISTURBED SAMPLES.. NO SIZE
P
DATE TIME =
ItAGSAMPLES NO
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nAYI TIM{ —„
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METHOD OF ORILLING ICRHIR Oral
•. AUGER SIZE
o WASH x WATER MUD X
BORINGSIZE ftIT USED
I ASING SIZE 211 LENGTH 50110 4CrODD
UNDISTURBED SAMPLES NO SIZE
IIAG SAM►LES NO 12
eUif Hl,l', :ES• AV1:_____,Df PT11._.^.. ..._.
WEATMR bunny - w --
NON•DRILLIMG TIME (INt.I
IORING LAVDUT MOVING
HAULINGWATER STANDfy
WATER LEVEL DATE TIME _
• DATE TIME
CAVf IN IIIVIN M___^_DAYI TIMI
III M AIIr'. IA.i . .y1 . ,,,.dd Ih •. •4nul un Ih1
ia.1 ,...•...PSI

1'l111.11 ( I I11 I I Y.
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Unn 1I II 54c1{q)•I'°•' (-IIIvy It ICk:31.11{4'111+'1 ('i _St I It I AC I 1 L f V'I'1411 ._.-
_
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mm
---.-
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•SL _ L,• •f • -----�-�
^.l RBI .�\ • 4u�° 1.A>ty/ fa� .:.: �-.----.--
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Mr.
MW
����1":}l.��
1111 �11 •�y�T'11T���li•,.:•�-------��
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. --------
METHOD Of DRILLING ICENdI Orr)
a AUGER SIZE
D WASH X WATER MUD X
bORING SIZE 5" SIT USED 3"
t ASING SIZE 2" LENGTH
UNDISTURBED SAMPLLS NO SIZE
IIAGSAMPLIS NO_
WEATHER Dululy "aila
NON -DRILLING TIME Ilir1.)
BORING LAYOUT
MOVING
HAULINGWATER
STANDBY
WATER LEVEL' F
DATE TIME _
O
DATE TIME
(:AVI IN III PTN r Dl.TI TIMI
III MAIII•. IA,l 01 •. onLl by v•.'�•'t.nl uu Ihr
1 .ee .. .,•• ,givl I•i l.f•I

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Sutton 2018
Inspection Report
PROJECT:
Sutton 1971 Basin Underwater Inspection
LOCATION:
Duke Energy -Carolinas
Sutton Station
Wilmington, North Carolina
Client Contact: Daniel Atkinson
Phone: [phone]
Prepared by: Ryan 1. Glenn
Signature:
Executive Vice President
19LENN
INDUSTRIAL GROUP
5325 Marshall Air Drive, Charlotte, NC, 28217. PH: 704-540-9777 FAX: [phone]
www.glenndiving.com Email: [e-mail]

CLIENT I Duke Energy
DATE I January 7, 2019
Introduction:
Glenn Industrial Group, Inc. (GLENN) was contracted by Duke Energy to perform an underwater
survey of three locations in the 1971 Basin at Sutton Station. The purpose of the survey was to
determine the composition of existing bottom at three different locations. The inspection was
conducted on December 30, 2018.
Inspection Method:
The initial survey was completed utilizing a remotely operated vehicle (ROV) with a multi beam sonar
to locate any large masses along the basin bottom. Once performed a second survey was conducted
(December 30th, 2018) utilizing GLENN surface supplied divers. The intent for the second survey was
to dive on the locations the sonar initially picked up to determine the make-up of the areas. Surveying
equipment was used during travel to pin point each location. Anchors were dropped to hold the dive
boat steady until the survey was completed. While on bottom, the diver made sweeping motions,
moving back and forth while using the dive hose for reference. While on location, a probe was utilized
and was driven into basin bottom as the diver traveled. The probe consisted of Y2" diameter rebar 6'
long. Markings were made every 1' on the probe to assist diver in reading measurements.
Inspection Findings
At all three locations (Location No. 1, 2, & 3), it was determined at elevation -34.82 a small layer of
ash sits on top of a layer of dense clay, with a hard -impenetrable layer underneath. While pushing
the probe 4' into the clay, it dead -headed against a hard layer. Due to the consistency of bottom, divers
were unable to dig down and determine the composition of this hard layer. This impenetrable layer
was found at elevation-38.82, and remained consistent at all three locations.
(Reference Appendix A for inspection data.)
OPP-112-01 Rev 02-05/18

CLIENT I Duke Energy
DATE January 7, 2019
Appendix A:
Inspection Data
OPP-112-01 Rev 02-05/18

GLENN
Project: Diver Bottom Survey
INDUSTRIAL GROUP
Client: Duke Energy
Inspection Location: Sutton 1971 Ash Basin
Photo No.
Date:
Location 1
1
12/20/2018
Description
-�
A probe was pushed into bottom
along elevation-34.82. Divers in
this area found an uneven layer of
°
ash with dense clay underneath. At
this elevation, the probe traveled
roughly 4' through the clay until
hitting a hard impenetrable layer.
This hard layer was consistent
D
along bottom at this elevation.
o
Timber debris was found while the
_
diver swept along bottom.
Photo No.
Date:
Location 2
`.
2
12/20/2018
Description:
The bottom survey of Location 2
matches what was found at
Location 1. At elevation-34.82', the
uneven layer of ash was noted,
with clay underneath. Divers
pushed the probe 4' through the
clay until hitting a hard
impenetrable layer. This hard layer
7
o <\
was consistent along bottom at this
o
elevation. Timber debris was also
noted during the survey.
Photo No.
Date:
-- -� Location 3
< \'
3
12/20/2018
Description:
The bottom survey of Location 3
matches what was found at
Location 2. At elevation-34.82',
°
the probe traveled roughly 4'
through ash and clay until hitting a
hard impenetrable layer. This hard
layer was consistent along bottom
= _�
at this elevation. Divers noted the
timber debris occurred more often
o o
and was noticeably larger in this
location.
_
Glenn Industrial Group 1 www.glennindustrialgroup.com