3620_DukeAllen_SSLF_GWVertSep_FID1886470_20240712

(> DUKE
ENERGY.
July 12, 2024
North Carolina Department of Environmental Quality
Division of Waste Management
Solid Waste Section
2090 U.S. 70 Highway
Swannanoa, NC 28778-8211
Attn: Ms. Sarah Moutos
525 S. Tryon Street
Mail Code: DEP-36A
Charlotte, NC 28202
Re: Groundwater Information to Demonstrate Vertical Separation REQUEST FOR APPROVAL —
South Starter Landfill
Reference No.: 3620-INDUS
Allen Steam Station
Gaston County, North Carolina
Dear Ms. Moutos,
The enclosed Technical Memorandum: Allen Steam Station — South Starter Landfill (Permit No. 3620-
INDUS) Groundwater Vertical Separation Evaluation was prepared by SynTerra at the request of Duke
Energy Carolinas, LLC (Duke Energy), and is being provided prior to installation of the South Starter
Landfill (SSLF) compacted soil liner (CSL) at the Duke Energy Allen Steam Station (Allen) for your
review and approval.
In accordance with the July 26, 2021 letter and June 16, 2023 Memorandum from the North Carolina
Department of Environmental Quality (NCDEQ), Division of Waste Management, Solid Waste Section
(Section), Duke Energy is submitting documentation that the Allen SSLF (Permit. No. 3620-INDUS)
complies with vertical groundwater separation requirements per the applicable North Carolina General
Statutes (NCGS) and U.S. Environmental Protection Agency (USEPA) coal combustion residuals
(CCR) Rule.
Upon the Section's review of the enclosed information, Duke Energy respectfully requests approval to
begin placement of CSL at the Allen SSLF. Duke Energy's landfill construction contractor is prepared to
begin placing CSL as soon as possible pending the Section's approval of the enclosed documentation.
If you have any questions or comments regarding this submittal, please contact me at
Courtney. MurphyCc duke-energy.com or [phone].
Respectfully submitted,
a (111
aAlwokol
Courtney W. Murphy, P.G.
Environmental Services
Page 1 of 2

Groundwater Information to Demonstrate Vertical Separation
Allen Steam Station —SSLF 3620-INDUS July 12, 2024
Enclosures (1): Technical Memorandum: Allen Steam Station — South Starter Landfill (Permit No. 3620-
INDUS) Groundwater Vertical Separation Evaluation, (SynTerra, July 12, 2024)
Cc: Jordan Russ — NCDEQ
Sherri Stanley — NCDEQ
Ed Sullivan — Duke Energy
Tyler Hardin — Duke Energy
Kim Witt — Duke Energy
Preston McCloud — Duke Energy
Sheila Westcott — Duke Energy
Jay Mokotoff — AECOM
Chris Suttell - SynTerra
Page 2 of 2

Terra Science &Engineering Consultants
148 River St., Suite 220, Greenville, SC 29601 1864.421.9999
TECHNICAL MEMORANDUM
Date: July 12, 2024 File: 0082.51.13.07
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To: Courtney Murphy (Duke Energy), Scott Kalau Duke Energy)
Cc: Henry Duperier (Duke Energy)
i.1
From: Chris Suttell, NC L.G., (SynTerra) Senior Project Manager 0•FQLq�?r���,�
Kathy Webb, NC L.G., Senior Peer Review y/ °Hv+^``
Subject: Allen Steam Station — South Starter Landfill (Permit No. 3620-INDUS) Groundwater Vertical
Separation Evaluation
L I11:Z@]111L411I:Q ON Iel►IP7:1*791%M191LTA ILTA /_1:YA
This technical memorandum demonstrates vertical separation of groundwater from the base of
the 1-foot thick compacted soil liner (CSL) at the South Starter Landfill (Permit No. 3620-INDUS)
(SSLF or landfill), currently under construction at the Duke Energy Carolinas, LLC (Duke Energy)
Allen Steam Station (Allen or Site) (Figure 1).
Results of groundwater level monitoring within and surrounding the SSLF indicate that water
levels have decreased such that there is at least 4 feet of vertical separation between the water
table and the designed base of the SSLF CSL. Since about 2019, the water levels in the vicinity of
the SSLF have decreased as a result of ash basin closure activities, including cessation of sluicing
to the Active Ash Basin (AAB) located adjacent to the SSLF, maintenance decanting of the AAB,
partial removal of coal combustion residuals (CCR) within the AAB, and removal of native soils
as part of the construction of the SSLF. Water level decline in the vicinity of the SSLF was
further expedited by operation of a dewatering extraction well system along the north and
western portion of the SSLF. Installation of a gravity flow construction drain beneath the SSLF
subgrade and continued ash basin closure activities are expected to maintain groundwater
elevations in the area at levels at least 4 feet below the CSL, as supported by previously
submitted groundwater flow model simulation results (SynTerra, 2023).
BACKGROUND
Ash basin closure activities include excavation of CCR from the Retired Ash Basin (RAB), the RAB
Landfill, and the AAB (Figure 1). The CCR is planned to be placed in multiple on -Site double -
lined landfills currently being designed, constructed, and operated. The SSLF is one of four ash
basin closure landfills at Allen and is currently under construction. The North Starter Landfill
(NSLF) went into operation in December 2023 and is receiving CCR. Two other landfills are
currently in the design and permitting phase.
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South Starter Landfill Groundwater Vertical Separation Evaluation July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station Page 2 of 6
In a letter to Duke Energy dated July 26, 2021, the North Carolina Department of Environmental
Quality, Division of Waste Management, Solid Waste Section (Section) requested Duke Energy
provide data that demonstrate vertical separation requirements per the applicable North
Carolina General Statutes (NCGS), North Carolina Administrative Code (NCAC), and U.S.
Environmental Protection Agency (USEPA) coal combustion residuals (CCR) Rule, specifically 40
CFR § 257.60. Required vertical separation per the applicable NCGS, specifically, Article 9 130A-
295.6(f), is 4 feet of separation between the groundwater table and the 1-foot-thick compacted
soil liner (CSL). The composite landfill liner is placed above the CSL, which is equivalent to the
USEPA CCR Rule requirement of 5 feet of separation from the landfill liner. This memorandum
provides documentation to satisfy the minimum requirements to be included in groundwater
vertical separation submittals for CCR landfills as outlined by the Section provided in a
memorandum to Duke Energy dated June 16, 2023.
Previous assessment activities indicate that groundwater flow is generally from west to east
toward the Catawba River/Lake Wylie within three unconfined flow zones beneath the Site. The
flow zones include the shallow (saprolite), deep (transition zone, partially weathered rock), and
bedrock (flow within fractures of competent bedrock).
M1 4 A 11*110 L1 FA:j:j Ie1►IbX4191►FAI:i1111L4k Ire] ►IeT411111I1VkIDO
The SSLF was designed by AECOM (AECOM, 2021). The design was based, in part, on results of a
groundwater flow model that simulated the Site -wide estimated long-term seasonal high (LTSH)
groundwater elevations after excavation of CCR was complete and under steady-state
conditions (SynTerra, 2020). This modeling assumed that flow within the historical natural
stream channels would be restored after closure activities in the AAB, RAB, and RAB Landfill are
complete. The SSLF was originally designed to have at least 4 feet of vertical separation
between the post -closure simulated estimated LTSH groundwater and the base of the SSLF liner
system, plus a Site -specific factor of safety. In order to stay on the construction schedule to
meet regulatory -required ash basin closure deadlines, measures were taken to expedite the
time to achieve groundwater vertical separation at the SSLF. The SSLF base grades were raised
approximately 5 feet across the SSLF footprint, and a construction drain was added to the
design as a contingency to maintain water levels beneath the SSLF more than 4 feet from the
base of the CSL (AECOM, 2023). Additionally, a dewatering extraction well system was installed
and operated along the north and western portion of the SSLF (Figure 2).
Closure activities were initiated with decanting of the AAB in June 2019. Closure activities are
scheduled to proceed in a complex sequence of phases and are expected to be completed by
2037. Several of these activities are dependent upon completion of previous (critical path)
activities. Construction of the SSLF is among the initial critical phases that enable subsequent
phases to proceed. Therefore, conditions assumed by the LTSH modeling are not yet in place,
and in some areas, current groundwater elevations are higher than those predicted over the
long term by the LTSH model. Additional groundwater modeling was performed in 2023 to
evaluate the effectiveness of additional dewatering measures, namely the dewatering
extraction well system (discussed further below) and the construction drain beneath the SSLF
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South Starter Landfill Groundwater Vertical Separation Evaluation July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station Page 3 of 6
footprint subgrade (SynTerra, 2023). The model also incorporated other recent changes in Site
conditions, including closure activities and SSLF construction progress. The updated
groundwater model predicted that the dewatering system operation, as modeled, would
effectively lower water levels to greater than 4 feet below the CSL across the SSLF, which would
enable construction of the construction drain and the construction drain, as designed and
modeled, would maintain water levels to greater than 4 feet below the CSL across the SSLF
once the dewatering well system operations ceased.
Excavation of CCR and native soils for subgrade construction of the SSLF began in January 2023.
During excavation, interstitial water was removed with excavated solids. Water was also
removed via pumping from temporary construction trenches and sumps (primarily stormwater)
as well as groundwater extraction wells that comprised a dewatering well system along the
north and western portions of the SSLF. Water from the trenches, sumps, and extraction wells
was pumped into the AAB Polishing Pond for management through a National Pollutant
Discharge Elimination System wastewater permitted outfall.
The dewatering well system (Figure 2) was operated in a series of stages, including a pilot stage,
a full-scale stage, and a reduced stage. The pilot stage began operations on January 18, 2023,
and included an initial 11 wells. Additional dewatering wells were added to expand the
dewatering well system along the north and western portions of the SSLF and brought online as
a full-scale system (total of 50 wells) beginning on August 30, 2023. Each dewatering well was
installed to a total depth of approximately 70 feet below ground surface with approximately 30-
foot spacings between wells. The full-scale system was turned off on January 11, 2024, to allow
for groundwater equilibration and to observe the magnitude of the water -level rebound. A
subset of dewatering wells, as depicted on Figure 2, were reactivated on February 13, 2024, to
further reduce water levels in that vicinity and enable completion of the construction drain
(primarily the drain sump) within the SSLF footprint. After the construction drain was
completed, the entire dewatering well system was turned off on May 28, 2024.
The construction drain was designed and constructed in general accordance with the Permit to
Construct Modification Request 1 (AECOM, 2023), submitted on May 5, 2023 (Figure 2). To
manage potential groundwater rebound resulting from ceasing operation of the dewatering
extraction well system, the construction drain was designed so that drain laterals would collect
such groundwater and maintain levels no higher than approximately 4.5 feet below the base of
the CSL. With the construction drain in place and operational, the dewatering well system is no
longer needed, and therefore, each of the dewatering wells associated with that system is
planned to be abandoned.
GROUNDWATER LEVEL MONITORING ACTIVITIES
Groundwater monitoring at the Site has been conducted quarterly since 2015, including water -
level measurements obtained from monitoring wells in the vicinity of the SSLF. To improve
monitoring resolution within the footprint and in the vicinity of the SSLF, four piezometers
(SSLF-PZ-1 through SSLF-PZ-4) were installed within the SSLF footprint in May 2022 prior to
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South Starter Landfill Groundwater Vertical Separation Evaluation July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station Page 4 of 6
removal of native soils for construction of the SSLF. The piezometers were installed in the upper
portion of the shallow flow zone, with well screens set to total depths approximately 10 feet
below the "Target Elevation" (elevation of minimum 4 feet of vertical separation between
groundwater surface and design base of CSL).
The progression of excavation of the SSLF subgrade resulted in the need for piezometers SSLF-
PZ-1 through SSLF-PZ-4 and several preexisting monitoring wells to be abandoned and replaced
in areas inside and outside the SSLF footprint. Wells abandoned in the vicinity of the SSLF
included GWA-1S/D/BR, GWA-2S/D, CCR-21S/D, CCR-22S/DA (abandoned in June 2023), and
CCR-23S/D (abandoned in January 2024). Replacement or supplemental monitoring wells
installed in the vicinity of the SSLF that were monitored to support vertical separation
demonstration included CCR-28S/D, CCR-29S/D, CCR-30SA/D, CCR-31S/D, and CCR-32S/D.
Those replacement wells were installed adjacent to the SSLF and were used to support the
evaluation of water levels in the area.
The initial piezometers (SSLF-PZ-1 through SSLF-PZ-4) were abandoned in April 2023 to enable
SSLF construction. Once the excavation was complete to near the targeted elevation of the
Landfill subgrade, replacement piezometers (SSLF-PZ-1R through SSLF-PZ-4R) were installed as
close as possible to the initial piezometers and at two additional locations (SSLF-PZ-S and SSLF-
PZ-6) to increase the resolution of the water table across the SSLF footprint. These six
piezometers were installed as access became available (October 2023 through April 2024).
During monitoring well and piezometer installation, continuous soil cores were obtained and
described to characterize lithology. The monitoring wells and piezometers were constructed in
accordance with Title 15A NCAC 02C, Section .0100, Well Construction Standards. Each
piezometer consisted of a 2-inch diameter schedule-40 polyvinyl chloride flush -joint threaded
casings and screens fitted with prepacked filter sand. Boring logs with well and piezometer
construction diagrams are included in Appendix A.
After installation, the piezometers and monitoring wells were developed to remove drilling
fluids and solids (fine-grained silts and clays) that might have been introduced into the
surrounding formation and filter pack during installation and also improve hydraulic connection
of the well with the surrounding formation. A North Carolina -registered land surveyor
determined the location and elevation of the wells and piezometers (Table 1). Manual water -
level measurements were recorded weekly from the piezometers and select wells when access
was available. Manually recorded water levels, dating back to the approximate time when
decanting of the AAB began, and well construction information are summarized in Table 1.
10ZT9l11&RITI level i"T"IAlEel 01Lei ill KC2.4*1111111%P
The groundwater elevation has been decreasing in the vicinity of the SSLF since the cessation of
sluicing and AAB decanting. Water -level decreases were accelerated by SSLF construction and
dewatering activities. Hydrographs developed using representative data from monitoring wells
and piezometers in the vicinity of the SSLF are provided as Figure 3A through Figure 3F. The
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South Starter Landfill Groundwater Vertical Separation Evaluation July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station Page 5 of 6
hydrographs also include precipitation data, model -simulated groundwater elevations
(SynTerra, 2023), and key dates for the dewatering well system operation. Although there are
observable short-term fluctuations in groundwater elevations, likely due to precipitation
events, the overall trends are decreasing and consistent with model -predicted water level
changes due to ash basin excavation and dewatering. Since ceasing operation of the entire
dewatering well system on May 28, 2024, groundwater levels have consistently met the criteria
of being more than 4 feet below the base of the planned CSL elevation at each monitoring
location within the SSLF footprint. Groundwater levels have continued to decrease since that
time.
Groundwater elevation measurements were taken on June 3, 2024, from SSLF piezometers and
surrounding monitoring wells to develop a groundwater surface elevation map (Figure 4).
Groundwater elevations from monitoring wells and piezometers completed in the first water -
bearing flow zone (shallow flow zone) were used to develop the water level map. As shown on
Figure 4, groundwater in the vicinity of the SSLF generally flows from west to east.
Continued closure activities are anticipated to result in continued decreases in water levels in
the area of the SSLF. Those additional closure activities in the vicinity of the SSLF include
dewatering and excavation of CCR from within the AAB. The construction drain beneath the
SSLF subgrade is designed to maintain water levels below the required minimum 4 feet of
separation from the bottom of the CSL. Installation of the liner system in the SSLF and the
eventual installation of the cover system will reduce infiltration in the footprint of the SSLF,
further lowering groundwater elevations in the area of the SSLF.
The data included in this Technical Memorandum and other referenced documents satisfies the
requirements outlined in the Section's June 16, 2023, letter and documents that there is, and
with measures in place and operating as designed, would continue to be, at least 4 feet of
vertical separation of groundwater from the base of the CSL.
LIST OF ATTACHMENTS
Figure 1 Site Location Map
Figure 2 Site Features and Monitoring Locations
Figure 3A — 3F Hydrographs for SSLF Area Monitoring Locations
Figure 4 Shallow Groundwater Surface Elevation Map —June 3, 2024
Table 1 Well Construction and Groundwater Elevation Summary
Appendix A Boring Logs with Well and Piezometer Construction Diagrams
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South Starter Landfill Groundwater Vertical Separation Evaluation
July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station
REFERENCES
Page 6 of 6
AECOM (2021). Engineering and Facility Plan, Allen Steam Station, South Starter Landfill (3620-
INDUS), Gaston County, North Carolina, Revision 1. March 26, 2021.
AECOM (2023). Permit to Construct Modification Request 1. Revision 0. Allen Steam Station —
South Starter Landfill (3620-INDUS). Gaston County, North Carolina. May 4, 2023.
SynTerra (2020). Long -Term Seasonal High Groundwater Elevation Estimation. Allen Steam
Station, Belmont, North Carolina. June 5, 2020.
SynTerra (2023). Groundwater Modeling to Support Vertical Separation — South Starter Landfill
3620-INDUS. July 11, 2023.
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South Starter Landfill Groundwater Vertical Separation Evaluation
July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station
FIGURES
synterracorp.com

LINED RETENTION BASIN aK• ��
DUKE ENERGY CAROLINAS 7B ' ` n G
PROPERTY BOUNDARY �I GYPSUM PAD- ; fl
cam+ rJ;ALLEN STEAM STATION
DISCHARGE
CANAL COAL PILE AREA
y Q,
• r���� • w
• ♦ ♦ s� • RETIRED ASH BASIN
• % • NORTH STARTER ASH LANDFILL
♦��• /•: ♦LANDFILL i ; RETIRED ASH BASIN BOUNDARY
RETIRED ASH BASIN I �_�_ �! •
WASTE BOUNDARY r
• I.
�.S�RONCRD�
y ♦� _ I ACTIVE ASH BASIN
+t . I Y - ♦1
`fs1,. • +� �j��1 ` SOUTH
'STARTER LANDFILL
k ACTIVE ASH BASIN • j r +♦,
WASTE BOUNDARY
JAY
NOTES:
1. PROPERTY BOUNDARY PROVIDED BY DUKE ENERGY CAROLINAS.
2. ALL BOUNDARIES ARE APPROXIMATE.
3. WATER FEATURES DEPICTED WITHIN WASTE BOUNDARIES OF THE ASH
BASINS ON THE USGS TOPOGRAPHIC MAP DO NOT REPRESENT CURRENT CONDITIONS.
4. USGS TOPOGRAPHIC MAP OBTAINED FROM ESRI. DATA REFRESHED APRIL 2023.
(> DUKE
ENERGY
CAROLINAS
10 �GAST
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FIGURE 1
SITE LOCATION MAP
SOUTH STARTER LANDFILL (3620 - INDUS)
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION
GASTON COUNTY, NORTH CAROLINA
DRAWN Sr. E. ORDEMANN DATE: 05/01/2023
REVISED BY: E. ORDEMANN DATE: 07/12/2024 1,000 0 1,000 2,aoa
CHECKED BY: C. SUTTELL DATE: 07/12/2024
APPROVED BY: C. SUTTELL DATE: 07/12/2024 GRAPHIC SCALE (IN FEET)
PROJECT MANAGER: C. SUTTELL

SSLF-PZ-01/01R
SSLF-PZ-02/02R
630
4
SSLF-PZ-01
I 4 SSLF-PZ-02
625
3,5
SSLF-PZ-01R
602
35 SSLF-PZ-02R
620
I_ 3
--*--Model Prediction
--*—Model Prediction
3
615
—Target Elevation (603 feet)
597
—Target Elevation (591 feet)
25
—Total Well depth (578.34feet)
610
0
—Start Full -Scale SSLF Dewatering System
0
2 "ri_
(8/30/2023)
0 592
—
0
— —Start Full -Scale SSLF Dewatering System
w 605
_
Stop Full -Scale SSLF Dewatering System
2 (8/30/2023)
.Q
15
(1/11/2024)
u —Stop Full -Scale SSLF Dewatering System
_Restart Northeast Dewatering System
a (1/11/2024)
1.5
600
(2/13/2024)
587
—Restart Northeast De watering Sy stem
1
—Stop Northeast Dewatering System
(2/13/2024)
595
(5/28/2024)
1 —Stop Northeast Dewatering System
—Model-Simulated Stop to Dewatering
582
(5/28/2024)
590
System (3/15/2024)
0-5 —Model-Simulated Stop to Dewatering
System (3/15/2024)
—Rainfall (in)
IrL,
—Rainfall (in)
585
0
577
0
5/20/2022 8/28/2022 12/6/2022
3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024
7/28/2024
5/20/2022 8/28/2022
12/6/2022 3/16/2023 6/24/2023
10/2/2023 1/10/2024
4/19/2024 7/28/2024
Date
Date
SSLF-PZ-03/03R
SSLF-PZ-04/04R
605
4
SSLF-PZ-03
625
4
t SSLF-PZ-04
3 -5
SSLF-PZ-03R
620
3.5 SSLF-PZ-04R
600
--*--Model Prediction
Model Prediction
3
615
3
—Target Elevation (597 feet)
—Target Elevation (617 feet)
595
I
2-5 c
—Total Well depth (580.70feet)
610
2.5 —Well depth (599.40feet)
c
O
'� 590
C
p
2 —
—Start Full -Scale SSLF Dewatering
C
605
2 a —Start Full -Scale SSLF Dewatering System
>
.a
System (8/30/2023)
m
.Q (8/30/2023)
a
—Stop Full -Scale SSLF Dewatering
—Stop Full -Scale SSLF Dewatering System
1.5
System (1/11/2024)
600
15 a (1/11/2024)
585
—Restart Northeast Dewatering
—Re start Northeast Dewaten ng System
System (2/13/2024)
(2/13/2024)
1
—Stop Northeast Dewatering System
595
1 —Stop Northeast Dewatering System
(5/28/2024)
(5/28/2024)
580
0.5
—Model-Simulated Stop to
590
0-5 —Model-Simulated Stop to Dewatering
Dewatering System (3115/2024)
System (3/15/2024)
1111
1
—Rainfall (in)
—Rainfall (in)
5751111iLl
0
585
O
5/20/2022 8/28/2022 12/6/2022
3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024
7/28/2024
5/20/2022 8/28/2022
12/6/2022 3/16/2023 6/24/2023
10/2/2023 1/10/2024
4/19/2024 7/28/2024
Date
Date
Notes:
15 DUKE
DRAWN BY: C. SUTTELL
DATE: 7/9/2024
FIGURE 3A
in - inches
���
REVISED BY:
HYDROGRAPHS FOR SSLF AREA
SSLF -South Starter Landfill
CHECKED BY: L. DRAGO
DATE:7/10/2024
CAROLINAS
MONITORING LOCATIONS
Elevation of feet is in reference to
North American Vertical Data of 1988
APPROVED BY: C. SUTTELL
DATE: 7/11/2024
"Northeast Dewatering System" comprises
the extraction wells encircled on Figure 2
PROJECT MANAGER: C. SUTTELL
GROUNDWATER VERTICAL SEPARATION
EVALUATION
ALLEN STEAM STATION
www.synterracorp.com
synTerra
GASTON COUNTY, NORTH CAROLINA

SSLF-PZ-05
SSLF-PZ-06
610
4
625
4
t SSLF-PZ-OS
� SSLF-PZ-06
3.5
� Model Prediction
620
3.5 --0--Model Prediction
605
3
—Target Elevation (605 feet)
615
3 —Target Elevation(613 feet)
—Start Full -Scale SSLF Dewatering System
600
25
—Well depth (588.19 feet)
610
2.5 (8/30/2023)
c
= —Stop Full -Scale SSLF Dewatering System
a
2 °
—Start Full -Scale SSLF Dewatering
o
2 (1/11/2024)
n
System (8/3012023)
605
2 0
w
—
'a —RestartNortheasL Dewatering System
595
—Stop Full-SLale SSLF Dewatering
w
(2/13/2024)
1.5
System (1/1112024)
600
1.5 d —Stop Northeast Dewatering System
— Restart Northeast Dewatering
(5/28/2024)
1
System (2/13/2024)
595
1 — Model -Simulated Stop to Dewatering
590
—Stop Northeast Dewatering System
System (3/1512024)
(5/28/2024]
0.5
—Total Well Depth (597.26)
— Model -Simulated Stop to
590
0.5
Dewatering System (3/15/2024)
—Rainfall (in)
585
0
—Rainfall {in}
585L
0
8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
5/20/2022
5/20/2022
9/29/2022
12/6/2022 3/16/2023
6/24/2023 10/2/2023 1/10/2024
4/19/2024 7/28/2024
Date
Date
CCR-18D
CCR-185
--9-- CCR-185
q
574
579
CCR-18 D
3.5
-41­ Model Prediction
3.5
572
577
f Model Prediction
3
—Start Full -Scale SSLF Dewatering
3
570
System (9/30/2023)
575
—Start Full -Scale SSLF Dewatering
2.5 �
System (8/30/2023)
'� —Stop Full -Scale SSLF Dewatering
_
2.5
.2 568
.2 System (1/11/2024)
573
—
—Stop Full -Scale SSLF Dewatering
o
-
`
o
System (1/11/2024)
iu
—
.Q —Restart Northeast Dewatering
571
'a
Sfifi
System (2/13/2024)
w
—RestartNortheast Dewatering System
(2/13/2024)
1.5 a
—Stop Northeast Dewatering System
569
1.5 a
Sfi4
(5/28/2024)
—Stop Northeast Dewatering System
1 — Model -Simulated Stop to Dewatering
567
1
(5/28/2024)
System (3/15/2024)
— Model -Simulated Stop to Dewatering
562
05
—Rainfall (in)
System (3/15/2024)
565lil
05
I
—Rainfall (in)
560
0
6/1/2019 12/18/2019
7/5/2020 1/21/2021 8/9/2021 2/25/2022 9/13/2022 4/1/2023
10/18/2023 5/5/2024
563
0
6/1/2019 12/18/2019 7/5/2020 1/21/2021 8/9/2021 2/25/2022 9/13/2022 4/1/2023 10/18/2023 5/5/2024
Date
Date
Notes:
15 DUKE
DRAWN BY: C. SUTTELL DATE: 7/9/2024
FIGURE 3B
in - inches
���
REVISED BY:
HYDROGRAPHS FOR SSLF AREA
SSLF -South Starter Landfill
CHECKED BY: L. DRAGO DATE:7/10/2024
CAROLINAS
MONITORING LOCATIONS
Elevation of feet is in reference to North American Vertical Data of 1988
APPROVED BY: C. SUTTELL DATE: 7/11/2024
"Northeast Dewatering System" comprises the extraction wells encircled on Figure 2
PROJECT MANAGER: C. SUTTELL
GROUNDWATER VERTICAL SEPARATION
��
EVALUATION
ALLEN STEAM STATION
www.synterracorp.com
synTerra
GASTON COUNTY, NORTH CAROLINA

CCR-20D
CCR-205
610
q
610
— I ) 4 CCR-20S
I
� CCR-20D
3.5
605
3.5 Model Prediction
605
+Model Prediction
3
—Start Full -Scale SSLF Dewatering System
600
3 SystemStart u(9/3012023) Dewatering
600
(8/30/2023}
2.5 c
—Stop Full -Scale SSLF Dewatering System
595
25 -5 —Stop Full -Scale SSLF Dewatering
°
(1/11/2024)
°
° System {1/11/2024}
a 595
2
—Re startNortheast Dewatedn Sstem
g y
v
2 —Restart Northeast Dewatenng Sy stem
L
(2/13/2024}
�' 590
(2/13/2024)
590
1.5a
—Stop Northeast Dewatering System
1.5 d —Stop Northeast Dewate ring System
(5/28/2024)
585
(5/2812024)
1
—Model-Simulated Stop to Dewatering
1 —Model-Simulate d Stop to Dewatering
585
System (3/15/2024)
System (3/11,2024)
0-5
—Rainfall [in]
580
OS
—Rainfall {in]
580
0
575L
0
6/1/2019 12/18/2019 7/5/2020 1/21/2021 8/9/2021 2/25/2022 9/13/2022 4/1/2023 10/18/2023 5/5/2024
6/1/2019 12/19/2019 7/5/2020 1/21/2021 9/9/2021 2/25/2022
9/13/2022 4/1/2023
10/18/2023 5/5/2024
Date
Date
CCR-285
CCR-20D
610
620
a
CCR-285
t CCR-20o
3-5
3.5 f Model Prediction
605 —
f Model Prediction
615
3
3
Start Full -Scale SSLF Dewatering
—Start Full -Scale SSLF Dewatering System
System (8/30/2023)
600
2.5
(9/30/2023)
610
2.5 5
—Stop Full -Scale SSLF Dewatering
—Stop Full -Scale SSLF Dewatering System
o
o System (1/11/2024)
9
595
2
2
(1/11/2024)%
—
a
2
>
L°
g
— Re start Northeast Dewatering System
w
.Q —Restart Northeast Dewatenng System
_
w
a
(2/13/2024)
W 605
(2/13/2024)
1.5 a
590
1.5
—Stop Northeast Dewate ring System
—Stop Northeast Dewatering System
(5/28/2024)
(5/29/2024)
1
—Model-Simulated Stop to Dewatering
600
1
— Model -Simulated Stop to Dewatering
585
System (3/15/2024)
System (3/15/2024]
dill
0.5
—Rainfall (in)111
IJI
0.5
—Rainfall (in)
ilk
580
0
595
I 0
6/1/2019 12/18/2019 7/5/2020 1/21/2021 8/9/2021 2/25/2022 9/13/2022 4/1/2023 10/18/2023 5/5/2024
5/20/2022 8/28/2022
12/6/2022 3/16/2023 6/24/2023
10/2/2023 1/10/2024
4/19/2024 7/28/2024
Date
Date
Notes:
DUKE
DRAWN BY: C. SUTTELL
DATE: 7/9/2024
FIGURE 3C
in - inches
���
REVISED BY:
HYDROGRAPHS FOR SSLF AREA
SSLF -South Starter Landfill
CHECKED BY: L. DRAGO
DATE:7/10/2024
CAROLINAS
MONITORING LOCATIONS
Elevation of feet is in reference to North American Vertical Data of 1988
APPROVED BY: C. SUTTELL
DATE: 7/11/2024
"Northeast Dewatering System" comprises the extraction wells encircled on Figure 2
PROJECT MANAGER: C. SUTTELL
GROUNDWATER VERTICAL SEPARATION
EVALUATION
101
ALLEN STEAM STATION
www.synterracorp.com
synTerra
GASTON COUNTY, NORTH CAROLINA

CCR-29D
620 I 2.5 CCR-29D
615
--*—Model Prediction
610 2
—Start Full -Scale SSLF Dewatering System
605 (8/30/2023)
15 —Stop Full -Scale SSLF Dewatering System
.c°- 600 y (1/11/2024)
-,art Northeast Dewatedng System
595 a
1 � {2/13/2024)
590 a —Stop Northeast Dewatering System
(5/28/2024)
585 05 —Model-Simulated Stopto Dewatering
System (3/15/2024)
N, 580 —Rainfall (in)
575 h n I 0
5/20/2022 8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
Date
CCR-30D
590 4
CCR-30D
578 3.5
� Model Prediction
576
3
574 —Start Full -Scale SSLF Dewatering System
(9/30/2023)
572 2.5 6
—Stop Full -Scale SSLF Dewatering System
o_ (1/11/2024)
m 570 2
g —Re startNortheast Dewatering System
W 568 (2/13/2024)
1.5 a
—Stop Northeast Dewatering System
566
(5/28/2024)
1
Model -Simulated Stop to Dewatering
564 System (3/15/2024)
0
562 .5
—Rainfall (in)
5. 0
5/20/2022 8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/29/2024
Date
CCR-29S
620 I 4
615 3.5 CCR-29S
--*—Model Prediction
610 3
—Start Full -Scale SSLF Dewatering System
605 (8/30/2023)
2-5 E
—Stop Full -Scale SSLF Dewatering System
y 600
(1/11/2024)
2
595 'n —Re startNortheast DewateringSystem
(2/13/2024)
1-5 a
590 —Stop Northeast Dewatering System
(5/28/2024)
1
585 11 — — Model -Simulated Stop to Dewatering
5-L== OS System (3/15/2024)
Rainfall (in)
575 0
5/20/2022 8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
Date
CCR-30S and CCR-30SA
590 I 4
CCR-30SA
578
3-5 --*--Model Prediction
576
574 3 —Start Full -Scale SSLF Dewatering System
01 (8/30/2023)
572 2'S = —Stop Full -Scale SSLF Dewatering System
c o (1/11/2024)
570 2 — Restart Northeast Dewatering System
n 568 (2/1312024)
W —
1.5 a —Stop Northeast Dewatering System
566 (5129/2024)
1 — Model -Simulated Stop to Dewatering
564 562 System (3/15/2024)
0.5 —Rainfall (in)
I Ad
560 0
5/20/2022 8/28/2022 12/G/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
Date
Notes:
DIKE
DRAWN BY: C. SUTTELL DATE: 7/9/2024
FIGURE 3D
in - inches
en ���
REVISED
HYDROGRAPHS FOR SSLF AREA
SSLF -South Starter Landfill
CAROLINAS
CHECKED BY: L. DRAGO DATE:7/10/2024
Elevation of feet is in reference to North American Vertical Data of 1988
APPROVED BY: C. SUTTELL DATE: 7/11/2024
MONITORING LOCATIONS
"Northeast Dewatering System" comprises the extraction wells encircled on Figure 2
PROJECT MANAGER: C. SUTTELL
GROUNDWATER VERTICAL SEPARATION
EVALUATION
ALLEN STEAM STATION
www.synterracorp.com
synTerra
GASTON COUNTY, NORTH CAROLINA

580 4
CCR-31 D
578
3.5
--*--Model Prediction
576
3
574 —Start Full-SLale SSLF Dewatering System
(8/30/2023)
572 _ 25
� —Stop Ful I-Scal e SSLF Dewated ng Syste m
2 o_ (1/11/2024)
570 2
.Q — Restart Northeast Dewatering System
568 (2/13/2024)
1-5 a
—Stop Northeast Dewatering System
566
(5/28/2024)
1
564 — Model -Simulated Stop to Dewatering
System (3/15/2024)
0.5
562 —Rainfall (in)
560 0
5/20/2022 8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/29/2024
Date
CCR-32 D
580 4
f CCR-32D
578 35
f Model Prediction
576
3
574 —Start Full -Scale SSLF Dewatering System
(8/30/2023)
572 2.5
—Stop Full -Scale SSLF Dewatering System
° ° (1/11/2024)
570 — 2 m
'EL — Restart Northeast Dewatering System
W 568 (2/13/2024)
1.5 d
566 —Stop Northeast Dewatering System
1 (5/28/2024)
564 — Model -Simulated Stop to Dewatering
System (3/15/2024)
562 0-5 —Rainfall (in)
560 0
5/20/2022 8/29/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
Date
CCR-31S
590 I 4
CCR-31S
578
I 3-5
--0-- Model Prediction
576
3
574 —Start Full -Scale SSLF Dewatering System
(8/30/2023)
572 2.5 5
—Stop Full -Scale SSLF Dewated ng System
° o_ (1/11/2024)
m 570 2
'n —Restart Northeast Dewatering System
m 568 (2/13/2024)
1.5 a
566 —Stop Northeast Dewatering System
(5/28/2024)
1
564 — Model -Simulated Stop to Dewatering
System (3/15/2024)
562 0.5 —Rainfall (in)
560 0
5/20/2022 8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
Date
CCR-32S
580 4 fCCR-32S
578 35
t Model Prediction
576
3
574 —Start Full -Scale SSLF Dewatering System
(8/30/2023)
572 2 5
� '�5 —Stop Full -Scale SSLF Dewatering System
°_ (1/11/2024)
m 570 2
.a —Restart Northeast Dewatering System
S68 Al (2/13/2024)
1.5 a
566 —Stop Northeast Dewatering System
(5/28/2024)
1
Model -Simulated Stop to Dewatering
564 System (3/15/2024)
562 0.5—Rainfall (in)
560 0
5/20/2022 8/28/2022 12/6/2022 3/16/2023 6/24/2023 10/2/2023 1/10/2024 4/19/2024 7/28/2024
Date
Notes:
115 DIKE
DRAWN BY: C. SUTTELL DATE: 7/9/2024
FIGURE 3E
in - inches
���
REVISED
HYDROGRAPHS FOR SSLF AREA
SSLF -South Starter Landfill
CAROLINAS
CHECKED BY: L. DRAGO DATE:7/10/2024
Elevation of feet is in reference to North American Vertical Data of 1988
APPROVED BY: C. SUTTELL DATE: 7/11/2024
MONITORING LOCATIONS
"Northeast Dewatering System" comprises the extraction wells encircled on Figure 2
PROJECT MANAGER: C. SUTTELL
GROUNDWATER VERTICAL SEPARATION
EVALUATION
ALLEN STEAM STATION
www.synterracorp.com
synTerra
GASTON COUNTY, NORTH CAROLINA

AB-11D
620
4
tnR-uD
3.5
Model Prediction
615
3
—Start Full -Scale SSLF Dewatering System
(8/30/2023)
610
2.5 c
—
—Stop Full -Scale SSLF Dewatering System
y
2
(1/11/2024)
Space intentionally left blank
y
g
—Restart Northeast Dewatering System
w 605
1.5 a
(2/13/2024)
—Stop Northeast Dewatering System
(5/28/2024)
1
600
— Model -Simulated Stop to Dewatering
ilk
System (3/1512024)
0.5
1
—Rainfall {in}
595
0
6/1/2019 12/18/2019 7/5/2020 1/21/2021 8/9/2021 2/25/2022 9/13/2022 4/1/2023 10/18/2023 5/S/2024
Date
Space intentionally left blank
Space intentionally left blank
Notes:
DUKE
DRAWN BY: C. SUTTELL DATE: 7/9/2024
FIGURE 3F
in -inches
, "ENERGY
REVISED BY:
HYDROGRAPHS FOR SSLF AREA
SSLF -South Starter Landfill
CHECKED BY: L. DRAGO DATE:7/10/2024
CAROLINAS
MONITORING LOCATIONS
Elevation of feet is in reference to North American Vertical Data of 1988
APPROVED BY: C. SUTTELL DATE: 7/11/2024
"Northeast Dewatering System" comprises the extraction wells encircled on Figure 2
PROJECT MANAGER: C. SUTTELL
GROUNDWATER VERTICAL SEPARATION
EVALUATION
101
ALLEN STEAM STATION
www.synterracorp.com
synTerra
GASTON COUNTY, NORTH CAROLINA

South Starter Landfill Groundwater Vertical Separation Evaluation
July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station
TABLE
synterracorp.com

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
6/1/2021
12/8/2021
2/10/2022
2/18/2022
2/25/2022
3/4/2022
3/11/2022
4/1/2022
4/15/2022
4/29/2022
5/5/2022
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607*
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595*
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599*
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617*
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
7.50
610.57
NM
NM
10.15
607.92
10.14
607.93
10.02
608.05
10.08
607.99
9.53
608.54
9.00
609.07
8.34
609.73
8.94
609.13
9.02
609.05
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
14.53
570.60
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
15.95
568.69
NM
NM
15.70
568.94
16.15
568.49
16.10
568.54
15.95
568.69
15.40
569.24
15.45
569.19
15.57
569.07
15.40
569.24
15.60
569.04
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
4.90
602.53
8.74
598.69
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
2.10
605.33
CCR-20S
Shallow
606.41
603.41
4.50
20.50
524227.56
1400166.81
N/A
5.88
600.53
8.13
598.28
NM
NM
NM
NM
NM
NM
6.57
599.84
NM
NM
6.32
600.09
6.22
600.19
6.18
600.23
1 6.15
600.26
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Page 1 of 8

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
5/20/2022
5/26/2022
6/21/2022
6/24/2022
6/30/2022
7/8/2022
8/18/2022
9/1/2022
9/16/2022
9/30/2022
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth to
Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
507*
NYI
NYI
23.69
621.87
23.91
621.65
24.03
621.53
NM
NM
24.20
621.36
23.53
622.03
26.00
619.56
26.12:593.89
4
26.35
619.21
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595*
NYI
NYI
17.22
602.52
17.82
601.92
17.88
601.86
NM
NM
18.17
601.57
18.60
601.14
18.74
601.00
18.822
19.01
600.73
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599*
NYI
NYI
13.93
595.83
14.47
595.29
14.55
595.21
NM
NM
14.95
594.81
15.52
594.24
15.67
594.09
15.87
15.88
593.88
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617*
NYI
NYI
24.60
lool
26.03
619.32
26.22
619.13
NM
NM
26.95
Ell 618.40
27.77
27.89jjjjjjj�
27.78
27.88
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
9.32
608.75
9.23
608.84
NM
NM
NM
NM
NM
NM
10.92
607.15
11.59
606.48
11.60
606.47
11.46
606.61
11.64
606.43
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
14.18
570.95
14.15
570.98
13.96
571.17
14.55
570.58
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
15.80
568.84
NM
NM
NM
NM
NM
NM
16.30
568.34
16.35
568.29
16.47
568.17
16.47
568.17
16.15
568.49
16.74
567.90
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
NM
NM
NM
NM
NM
NM
NM
NM
3.39
604.04
NM
NM
4.86
602.57
5.00
602.43
5.20
602.23
5.83
601.60
CCR-20S
Shallow low
603.41
4.50
20.50
524227.56
1400166.81
N/A
5.88
600.53
NM
NM
NM
NM
NM
NM
5.71
600.70
5.70
600.71
5.70
600.71
5.93
1 600.48
1 5.95
600.46
6.15
600.26
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Page 2 of 8

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
10/14/2022
11/3/2022
11/18/2022
12/1/2022
12/16/2022
1/20/2023
2/23/2023
3/30/2023
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607.00
26.04
619.52 91
26.44
619.12
26.09
619.47
25.95
619.61
25.25
620.31 91
27.40
618.16
31.40
514.1
32.57
612.99
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595.04
18.44
601.30
19.08
600.66
17.98
601.76
16.64
603.ill
16.25
603.49
NM
NM
16.58
603.16
19.38
600.36
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599.10
15.51
594.25
15.84
593.92
15.72
594.04
15.20
594.5
14.62
595.14
14.78
4.98
13.82
595.94
14.64
595.12
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617.30
27.56
hoj17.79
27.67
617.68
27.10
618.25
26.75
26.13
25.06
24.57
25.62
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
11.16
606.91
11.14
606.93
10.55
607.52
10.08
607.99
9.65
608.42
9.56
608.51
9.50
608.57
10.71
607.36
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
14.46
570.67
15.13
570.00
14.02
571.11
13.05
572.08
13.07
572.06
14.90
570.23
14.96
570.17
16.56
568.57
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
16.70
567.94
17.15
567.49
16.29
568.35
15.54
569.10
15.45
569.19
15.43
569.21
15.00
569.64
15.52
569.12
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
5.61
601.82
6.15
601.28
5.52
601.91
4.87
602.56
4.24
603.19
3.34
604.09
2.84
604.59
4.42
603.01
CCR-20S
Shallow
606.41
603.41
1 4.50
20.50
524227.56
1400166.81
N/A
1 5.98
600.43
6.18
600.23
5.93
600.48
6.26
600.15
6.34
600.07
6.36
600.05
6.41
600.00
6.43
599.98
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Page 3 of 8

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
4/18/2023
10/24/2023
10/26/2023
11/6/2023
11/13/2023
11/20/2023
11/27/2023
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607.00
31.60
613.96
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595.04
NM
NM
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599.10
14.69
595.07
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617.30
25.72
619.63
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591.00
NYI
NYI
12.99
588.58
13.44
588.13
14.44
Ir 587.13
15.08
586.49
15.24
586.33
14.80
586.77
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597.00
NYI
NYI
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617.00
NYI
NYI
12.42
609.65
12.52
609.55
12.97
609.10
13.33
608.74
13.71
608.36
13.63
608.44
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605.00
NYI
NYI
11.83
599.15
11.50
599.48
12.53
598.45
12.73
598.25
12.94
598.04
12.66
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
NYI
NYI
27.87
618.46
27.90
618.43
30.14
616.19
31.38
614.95
31.60
614.73
31.68
614.65
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
NYI
NYI
NYI
NYI
29.55
616.97
31.65
614.87
31.92
614.60
32.16
614.36
32.27
614.25
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
NYI
NYI
44.71
583.99
42.61
586.09
45.24
583.46
45.51
583.19
45.54
583.16
45.66
583.04
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
NYI
NYI
NYI
NYI
NYI
NYI
43.10
584.56
43.21
584.45
43.31
584.35
43.45
584.21
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
9.15
608.92
NM
NM
NM
NM
NM
NM
NM
NM
12.94
605.13
12.98
605.09
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
13.63
571.50
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
15.35
569.29
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
4.55
602.88
NM
NM
NM
NM
NM
NM
NM
NM
22.03
585.40
22.12
585.31
CCR-20S
Shallow
606.41
603.41
1 4.50
20.50
524227.56
1400166.81
N/A
6.40
600.01
NM
NIV
NM
NM
NM
NM
NM
NM
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft -NAND SS)
Approximate
Ground
Surface
Elevation
(Ft -NAND 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
12/5/2023
12/13/2023
12/20/2023
1/5/2024
1/11/2024
1/17/2024
1/25/2024
2/1/2024
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607.00
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595.04
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599.10
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617.30
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591.00
15.52
586.05
15.55
586.02
15.79
585.78
16.10
585.47
15.81
Inaccessible
NM
Inaccessible
NM
Inaccessible
NM
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597.00
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Inaccessible
NM
Inaccessible
NM
Inaccessible
NM
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617.00
13.81
608.26
13.88
608.19
14.56
607.51
14.90
607.17
14.60
607.47
13.73
608.34
Inaccessible
NM
13.21
608.86
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605.00
12.97
598.01
13.01
597.97
13.12
597.86
13.43
597.55
13.00
597.98
12.52
598.46
Inaccessible
NM
11.71
599.27
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
17.41
602.26
14.40
605.2
14.32
605.35
10.73
608.94
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
31.71
614.62
31.81
614.52
31.95
614.38
31.77
614.56
31.41
614.92
30.94
615.39
31.73
614.60
30.78
615.55
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
32.31
614.21
32.37
614.15
32.43
614.09
32.40
614.12
31.93
614.59
31.60
614.92
32.12
614.40
31.27
615.25
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
45.77
582.93
45.82
582.88
45.98
582.72
46.11
582.59
46.18
582.52
45.97
582.73
45.72
582.98
Inaccessible
NM
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
43.54
584.12
43.60
584.06
43.76
583.90
43.82
583.84
43.81
583.85
43.40
584.26
43.51
584.15
Inaccessible
NM
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NA
NA
NA
NA
NM
NA
NM
NA
NM
NA
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
13.06
605.01
13.28
604.79
12.88
605.19
NM
NM
12.44
605.63
12.07
606.00
13.10
604.97
12.87
605.20
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
NM
NM
NM
NM
NM
NM
NM
NM
17.28
567.85
19.43
565.70
19.37
565.76
16.96
568.17
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
NM
NM
NM
NM
NM
NM
NM
NM
16.63
568.01
16.70
567.94
16.66
567.98
16.76
567.88
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
22.48
584.95
22.68
584.75
22.80
584.63
22.40
585.03
21.68
585.75
17.67
589.76
22.74
584.69
16.67
590.76
CCR-205
Shallow
1 606.41
603.41
4.50
20.50
524227.56
1400166.81
N/A
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
22.54
583.87
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Page 5 of 8

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
2/7/2024
2/14/2024
2/21/2024
2/28/2024
3/6/2024
3/12/2024
3/20/2024
3/27/2024
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607.00
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595.04
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599.10
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617.30
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603.00
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
NYI
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591.00
11.70
11.18
590.39
11.20
590.37
12.38
12.99
588.58
13.47
588.10
14.12
587.45
14.03
87.54
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597.00
Dry
<580.70
Dry
<580.70
Inaccessible
NM
Inaccessible
NM
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
580.70
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617.00
13.50
608.57
13.46
608.61
13.72
608.35
13.86
608.21
13.36
608.71
12.80
609.27
12.94
609.13
12.79
7609.28
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605.00
11.95
599.03
11.66
599.32
11.91
599.07
12.11
598.87
11.62
599.36
11.14
599.84
11.72
599.26
11.6999.29
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613.00
9.55
610.12
8.65
611.02
7.98
611.69
7.73
611.94
7.30
612.37
6.72
612.95
6.97
612.70
6.93
612.74
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
31.01
615.32
31.17
615.16
31.31
615.02
31.46
614.87
31.21
615.12
31.15
615.18
31.09
615.24
31.01
615.32
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
31.60
614.92
31.58
614.94
31.80
614.72
32.91
613.61
31.60
614.92
31.57
614.95
31.50
615.02
31.24
615.28
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
46.05
582.65
46.03
582.67
45.93
582.77
45.96
582.74
45.91
582.79
45.56
583.14
45.81
582.89
45.72
582.98
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
43.63
584.03
43.61
584.05
43.53
584.13
43.59
584.07
43.60
584.06
43.53
584.13
43.49
584.17
43.40
584.26
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
NM
NA
33.07
564.59
31.50
566.16
31.15
566.51
31.02
566.64
30.90
566.76
30.93
566.73
30.91
566.75
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
NYI
NYI
NYI
NYI
30.04
568.40
30.17
568.27
30.03
568.41
29.97
568.47
29.95
568.49
29.92
568.52
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
NYI
NYI
NYI
NYI
29.20
567.82
29.42
567.60
29.37
567.65
29.30
567.72
27.21
569.81
29.00
568.02
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
NYI
NYI
NYI
NYI
28.47
568.09
28.67
567.89
28.61
567.95
28.49
568.07
28.07
568.49
27.93
568.63
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
NYI
NYI
NYI
NYI
27.23
567.90
27.45
567.68
27.41
567.72
27.28
567.85
27.21
567.92
27.18
567.95
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
NYI
NYI
NYI
NYI
27.49
567.50
27.71
567.28
27.55
567.44
27.21
567.78
27.17
567.82
27.12
567.87
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
12.42
605.65
12.53
605.54
12.67
605.40
12.76
605.31
12.48
605.59
12.40
605.67
12.37
605.70
12.30
605.77
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
20.24
564.89
20.56
564.57
20.80
564.33
21.01
564.12
20.95
564.18
17.76
567.37
20.57
564.56
20.49
564.64
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
16.69
567.95
15.57
569.07
17.45
567.19
DRY
NA
17.48
567.16
17.20
567.44
17.06
567.58
17.02
567.62
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
14.10
593.33
13.78
593.65
17.81
589.62
20.00
587.43
21.07
586.36
21.82
585.61
22.50
584.93
22.47
584.96
CCR-205
Shallow
606.41
603.41
1 4.50
1 20.50
1 524227.56
1 1400166.81
N/A
I BTP(>16.80)
1 <589.61
1 15.57
590.84
16.73
589.68
DRY
NA
BTP(>16.80)
<589.61
BTP(>16.80)
7589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Page 6 of 8

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
4/2/2024
4/9/2024
4/17/2024
4/24/2024
5/1/2024
5/8/2024
5/15/2024
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607.00
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595.04
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599.10
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617.30
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603.00
NYI
NYI
6.80
6.97
6.43
602.93
6.90
6.0SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591.00
14.07
587.50
14.11
587.46
15.507602.39
586.07
15.80
585.77
16.13
585.44
15.66
NM
Inaccessible
NM
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597.00
Dry
<580.70
Dry
<580.70
Dry<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617.00
12.70
609.37
12.73
609.34
13.51608.56
13.62
608.45
13.93
608.14
13.65
608.42
13.57
608.50
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605.00
11.60
599.38
12.55
598.43
13.01
597.97
13.14
597.84
13.47
597.51
13.00
597.98
12.96
598.02
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613.00
6.89
612.78
6.92
612.75
6.92
612.75
7.02
612.65
7.85
611.82
6.97
6.90
612.77
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
29.18
617.15
29.23
617.10
31.04
615.29
32.03
614.30
31.44
614.89
31.53
614.80
31.87
614.46
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
31.29
615.23
31.31
615.21
31.53
614.99
31.60
614.92
31.89
614.63
31.80
614.72
31.67
614.85
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
45.90
582.80
45.93
582.77
46.03
582.67
46.13
582.57
46.14
582.56
46.23
582.47
46.14
582.56
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
43.51
584.15
43.59
584.07
43.64
584.02
43.69
583.97
43.81
583.85
43.86
583.80
43.74
583.92
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
31.16
566.50
31.19
566.47
31.64
566.02
31.68
565.98
31.82
565.84
31.64
566.02
31.59
566.07
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
29.80
568.64
29.86
568.58
30.17
568.27
30.23
568.21
30.32
568.12
30.10
568.34
30.17
568.27
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
29.07
567.95
Inaccessible
NM
29.54
567.48
29.59
567.43
29.80
567.22
29.65
567.37
29.50
567.52
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
26.85
569.71
Inaccessible
NM
28.80
567.76
28.88
567.68
29.06
567.50
28.91
567.65
28.81
567.75
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
27.18
567.95
Inaccessible
NM
27.56
567.57
27.78
567.35
27.95
567.18
Inaccessible
NM
Inaccessible
NM
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
27.08
567.91
Inaccessible
NM
27.82
567.17
27.89
567.10
28.08
566.91
Inaccessible
NM
Inaccessible
NM
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
12.13
605.94
Inaccessible
NM
12.26
605.81
12.31
605.76
12.96
605.11
12.91
605.16
12.88
605.19
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
20.32
564.81
20.38
564.75
21.02
564.11
21.01
564.12
21.13
564.00
20.85
564.28
20.76
564.37
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
16.89
567.75
16.95
567.69
BTP
<567.16
BTP
<567.16
BTP
<567.16
BTP
<567.16
BTP
<567.16
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
22.49
584.94
22.53
567.69
24.18
583.25
24.46
582.97
24.76
582.67
24.82
582.61
24.38
583.05
CCR-205
Shallow
1 606.41
603.41
4.50
20.50
524227.56
1400166.81
1 N/A
BTP(>16.80)
1 <589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Page 7 of 8

TABLE 1
WELL CONSTRUCTION AND GROUNDWATER ELEVATION SUMMARY
GROUNDWATER VERTICAL SEPARATION EVALUATION
ALLEN STEAM STATION - SOUTH STARTER LANDFILL
DUKE ENERGY CAROLINAS, LLC, GASTON COUNTY, NC
Location ID
Monitoring
Flow Zone
Top of Well
Casing
(Ft-NAVD 88)
Approximate
Ground
Surface
Elevation
(Ft-NAVD 88)
Screened
Interval
(Ft-BGS)
Northing
Easting
Target
Groundwater
Elevation^
(Ft-NAVD 88)
5/22/2024
5/30/2024
6/3/2024
6/11/2024
6/19/2024
6/25/2024
7/1/2024
Calculated Vertical
Separation from
Target Elevation as
of 7/1/2024
Elevation)
(Ft)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
Depth
to Water
(Ft-BTOC)
Groundwater
Elevation
(Ft-NAVD 88)
SSLF-PZ-01
Shallow
645.56
642.62
27.00
52.00
524031.27
1399444.01
607.00
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
N/A
SSLF-PZ-02
Shallow
619.74
616.69
13.00
28.00
523991.93
1400031.62
595.04
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
N/A
SSLF-PZ-03
Shallow
609.76
606.82
19.00
29.00
523550.59
1399901.63
599.10
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
N/A
SSLF-PZ-04
Shallow
645.35
642.31
23.00
43.00
523561.42
1398990.72
617.30
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
Abandoned
N/A
SSLF-PZ-01R
Shallow
609.36
606.69
5.00
20.00
524110.00
1399614.45
603.00
5.75
6.52
602.84
6.42
02.94
6.60
7.02
6
7.29
602.07
7.22
0.86
SSLF-PZ-02R
Shallow
601.57
598.34
5.00
20.00
523970.77
1400034.01
591.00
13.43
588.14
14.97
586.60
15.03
586.54
12.25
589.32
12.51
589.06
12.44
589.13
12.35
589.22
1.78
SSLF-PZ-03R
Shallow
603.81
600.70
5.00
20.00
523534.57
1399968.60
597.00
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
Dry
<580.70
>16.3
SSLF-PZ-04R
Shallow
622.07
619.40
5.00
20.00
523485.74
1399046.62
617.00
13.48
608.59
13.20
608.87
13.51
608.56
13.80
608.27
14.23
607.84
14.45
607.62
14.60
607.47
9.53
SSLF-PZ-05
Shallow
610.98
608.19
5.00
20.00
523689.45
1399580.96
605.00
12.31
598.67
13.10
597.88
13.55
597.43
13.57
597.41
13.74
597.24
13.89
597.09
14.00
596.98
8.02
SSLF-PZ-06
Shallow
619.67
617.26
5.00
20.00
523827.66
1399117.56
613.00
6.83
612.84
7.39
612.28
7.38
612.29
7.68
611.99
8.40
611.27
8.80
hL_610.87
8.90
610.77
2.23
CCR-28S
Shallow
646.33
643.55
30.00
40.00
523350.31
1398753.20
N/A
31.77
614.56
31.22
615.11
31.42
614.91
31.65
614.68
31.96
614.37
32.02
614.31
32.32
614.01
N/A
CCR-28D
Deep
646.52
643.44
108.00
118.00
523358.28
1398753.93
N/A
31.60
614.92
31.57
614.95
31.75
614.77
31.94
614.58
32.20
614.32
32.31
614.21
32.63
613.89
N/A
CCR-29S
Shallow
628.70
625.77
42.00
52.00
523320.00
1399634.19
N/A
46.10
582.60
46.17
582.53
46.25
582.45
46.33
582.37
46.29
582.41
46.34
582.36
46.48
582.22
N/A
CCR-29D
Deep
627.66
624.90
96.00
106.00
523317.97
1399655.74
N/A
43.63
584.03
43.68
583.98
43.88
583.78
43.97
583.69
44.12
583.54
44.21
583.45
43.91
583.75
N/A
CCR-30SA
Shallow
597.66
594.65
35.00
45.00
523270.80
1400236.54
N/A
31.51
566.15
31.42
566.24
31.44
566.22
31.53
566.13
31.83
565.83
31.91
565.75
32.35
565.31
N/A
CCR-30D
Deep
598.44
595.15
57.00
67.00
523265.20
1400227.94
N/A
30.11
568.33
29.91
568.53
29.95
568.49
30.02
568.42
30.28
568.16
30.32
568.12
30.69
567.75
N/A
CCR-31S
Shallow
597.02
593.92
30.00
40.00
523553.24
1400280.84
N/A
26.68
570.34
30.02
567.00
29.43
567.59
29.30
567.72
29.73
567.29
29.81
567.21
30.35
566.67
N/A
CCR-31D
Deep
596.56
594.02
104.00
114.00
523556.95
1400286.47
N/A
28.74
567.82
28.81
567.75
28.74
567.82
28.62
567.94
29.11
567.45
29.17
567.39
29.65
566.91
N/A
CCR-32S
Shallow
595.13
591.91
35.00
45.00
524019.72
1400544.31
N/A
26.68
568.45
26.73
568.40
27.43
567.70
27.57
567.56
28.34
566.79
28.19
566.94
28.83
566.30
N/A
CCR-32D
Deep
594.99
591.72
105.00
115.00
524019.23
1400553.01
N/A
27.22
567.77
27.27
567.72
27.21
567.78
27.89
567.10
27.89
567.10
28.40
566.59
28.87
566.12
N/A
AB-11D
Deep
618.07
615.39
15.00
20.00
523285.10
1399060.00
N/A
12.83
605.24
12.96
605.11
12.70
605.37
12.93
605.14
13.03
605.04
13.14
604.93
13.88
604.19
N/A
CCR-18D
Deep
585.13
582.13
180.40
185.40
524551.09
1400441.99
N/A
20.71
564.42
20.80
564.33
20.93
564.20
20.91
564.22
20.97
564.16
21.03
564.10
21.21
563.92
N/A
CCR-18S
Shallow
584.64
581.64
5.60
20.60
524558.20
1400444.19
N/A
BTP
<567.16
BTP
<567.16
17.90
566.74
BTP
<567.16
BTP
<567.16
BTP
<567.16
BTP
<567.16
N/A
CCR-20D
Deep
607.43
604.43
173.10
178.10
524227.95
1400156.93
N/A
24.02
583.41
21.81
585.62
19.74
587.69
17.40
590.03
17.93
589.50
18.18
589.25
15.78
591.65
N/A
CCR-205
Shallow
606.41
1 603.41
4.50
20.50
524227.56
1400166.81
N/A
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
22.45
583.96
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
BTP(>16.80)
<589.61
N/A
Notes:
_Groundwater elevation is at least 4 feet below the target groundwater elevation
Groundwater elevation is less than 4 feet below the target groundwater elevation
^ - Target groundwater elevation for a minimum of 4 feet of vertical separation of the water table from the CSL, based on revised SSLF base grades (see AECOM Permit to Construct Modification Request dated 5/512023)
- Initial target elevation prior to AECOM's 5/5/2023 Permit to Construct Modification Request
> - greater than
<- less than
BGS - below ground surface
BTOC - below top of casing
BTP - below top of pump - well is fitted with a dedicated bladder pump and water level occurs below top of the pump, preventing a water level measurement
CSL - compacted soil liner
Dry - well was dry at time of water level sweep.
Ft - feet
N/A - not applicable
NA - not available
NAVD 88 - North American Vertical Datum of 1988.
NM - not measured
NYI - Not yet installed
SSLF - South Starter Landfill
Prepared by: LVS Checked by: CJS
Page 8 of 8

South Starter Landfill Groundwater Vertical Separation Evaluation
July 12, 2024
Duke Energy Carolinas, LLC, Allen Steam Station
APPENDIX A
BORING LOGS WITH WELL AND
PIEZOMETER CONSTRUCTION DIAGRAMS
synterracorp.com

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: SSLF-PZ-1R
STARTED: 4/08/2024
COMPLETED: 4/08/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 524110.00
EASTING: 1399614.45
DRILLING METHOD: Sonic
G.S. ELEV: 606.69
M.P. ELEV: 609.36
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 5.92' BTOC
TOTAL DEPTH: 20' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
a d
a p
DESCRIPTION
WELL CONSTRUCTION
LU
p ..
L7
u--- —————————————————————————————————
Sand: Red/brown, fine grained, trace clay, saprolitic, moist
5
10
15
Borehole terminated at 20' bgs.
20
Protective
casing with
locking cap
Aquaguard (0-1
feet bgs)
Bentonite
Holeplug (1-3
feet bgs)
2" Sch 40 PVC
Riser
Sand Filter
Pack(3-20
feet bgs)
2" Pre -Packed
Well Screen
(5-20 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 1 OF 1

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: SSLF-PZ-2R
STARTED: 10/23/2023
COMPLETED: 10/23/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523970.7719
EASTING: 1400034.014
DRILLING METHOD: Sonic
G.S. ELEV: 598.34
M.P. ELEV: 601.57
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 12.38' BTOC
TOTAL DEPTH: 20' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
v
aa
p
DESCRIPTION
WELL CONSTRUCTION
LU
p ..
L7
u--- —————————————————————————————————
Sand: Red/brown, fine grained, trace clay, saprolitic, moist
5
10
15
Borehole terminated at 20' bgs.
20
Protective
casing with
locking cap
Aquaguard (0-1
feet bgs)
Bentonite
Holeplug (1-3
feet bgs)
2" Sch 40 PVC
Riser
Sand Filter
Pack (3-20
feet bgs)
2" Pre -Packed
Well Screen
(5-20 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 1

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: SSLF-PZ-3R
STARTED: 10/23/2023
COMPLETED: 10/23/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523534.5704
EASTING: 1399968.6
DRILLING METHOD: Sonic
G.S. ELEV: 600.69
M.P. ELEV: 603.81
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: Dry
TOTAL DEPTH: 20' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
v
ay
a p
DESCRIPTION
WELL CONSTRUCTION
W N
Protective
casing with
locking cap
Aquaguard (0-1
feet bgs)
Bentonite
Holeplug (1-3
feet bgs)
2" Sch 40 PVC
Riser
Sand Filter
Pack(3-20
feet bgs)
2" Pre -Packed
Well Screen
(5-20 feet
bgs)
'10 SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 1 OF 1

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: SSLF-PZ-4R
STARTED: 10/23/2023
COMPLETED: 10/23/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523485.7408
EASTING: 1399046.621
DRILLING METHOD: Sonic
G.S. ELEV: 619.40
M.P. ELEV: 622.07
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 13.86' BTOC
TOTAL DEPTH: 20' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
a
a O
DESCRIPTION
WELL
CONSTRUCTION
Uj
a
L7
---------------------------------
Sand: Red to gray, fine grained, saprolitic, dry
Wiz, ---------------------------------
p Weathered rock: Gray/white, moist
10 pQa
DQa
DQa
DQa
DQa
15 0
DQa
DQa
DQa
0
DQa
o Borehole terminated at 20' bgs.
20
Protective
casing with
locking cap
Aquaguard (0-1
feet bgs)
Bentonite
Holeplug (1-3
feet bgs)
2" Sch 40 PVC
Riser
Sand Filter
Pack(3-20
feet bgs)
2" Pre -Packed
Well Screen
(5-20 feet
bgs)
�� SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
s)mTerm Phone: [phone] PAGE i OF 1

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: SSLF-PZ-S
STARTED: 10/23/2023
COMPLETED: 10/23/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523689.4499
EASTING: 1399580.958
DRILLING METHOD: Sonic
G.S. ELEV: 608.19
M.P. ELEV: 610.97
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 12.11' BTOC
TOTAL DEPTH: 20' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
a
a p
DESCRIPTION
WELL CONSTRUCTION
LU
p
L7
._.-- ---------------------------------
Sandy silt: Red/brown, fine grained, moist
---------------------------------
Saprolite: Red/brown to gray, fine grained, some banding, moist
10
15
Borehole terminated at 20' bgs.
20
Protective
casing with
locking cap
Aquaguard (0-1
feet bgs)
Bentonite
Holeplug (1-3
feet bgs)
2" Sch 40 PVC
Riser
Sand Filter
Pack(3-20
feet bgs)
2" Pre -Packed
Well Screen
(5-20 feet
bgs)
'10 SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 1 OF 1

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: SSLF-PZ-6
STARTED: 1/5/2024
COMPLETED: 1/5/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523827.63
EASTING: 1399117.47
DRILLING METHOD: Sonic
G.S. ELEV: 617.26
M.P. ELEV: 619.67
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 7.73' BTOC
TOTAL DEPTH: 20' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
aw
a p
DESCRIPTION
WELL CONSTRUCTION
p �
C7
Protective
casing with
locking cap
Aquaguard (0-1
feet bgs)
Bentonite
Holeplug (1-3
feet bgs)
2" Sch 40 PVC
Riser
Sand Filter
Pack(3-20
feet bgs)
2" Pre -Packed
Well Screen
(5-20 feet
bgs)
�� SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
SynTerra Phone: [phone] PAGE 1 OF 1

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-28D
STARTED: 10/19/2023
COMPLETED: 10/25/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523358.2776
EASTING: 1398753.93 M.P.
DRILLING METHOD: Sonic
G.S.ELEV: 643.44
ELEV: 646.51
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 32.91' BTOC
TOTAL DEPTH: 118' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = Below top of casing
U
a d
a p
DESCRIPTION
WELL CONSTRUCTION
t,
10
15
20
25
30
35
I
Silty clay: Red to brown orange, non -plastic, cohesive, micaceous,
dry
Sandy silt: Tan/brown, non -plastic, cohesive, slightly moist
,-
Sandy silt: Tan/brown, medium grained, non -plastic, cohesive,
saprolitic, slightly moist
'-
Sandy silt: Dark gray, fine to medium grained, non -plastic,
cohesive, saprolitic, slightly moist
Protective
casing with
locking cap
2" Sch 40 PVC
Riser
Aquaguard
(0-55 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 3

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-28D
STARTED: 10/19/2023
COMPLETED: 10/25/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523358.2776
EASTING: 1398753.93
DRILLING METHOD: Sonic
G.S. ELEV: 643.44
M.P. ELEV: 646.51
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 32.91' BTOC
TOTAL DEPTH: 118' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
STOC = Below top of casing
v
aa
p
DESCRIPTION
WELL CONSTRUCTION
LU
19
9
L7
40
45
50
55
T T: Silty sand: Light gray, coarse grained, consolidated, dry
•TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
,
-TT
-TT
-TT
-TT
-TT
-TT
r. T Silty sand: Light gray, fine to medium grained, non plastic,
.-
r.
T T • crumbly, dry
.T T'
.T T'
.T T'
.T T'
.T T'
.T T'
.T T'
.T T'
T'
77r.T T'
T'
77r.T T'
.T T'
T .
._T'
No Recovery
60
65
70
75
Weathered rock: Gray/tan, contains coarse grained sand, contains
quartz fragments, dry
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 2 OF 3

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-28D
STARTED: 10/19/2023
COMPLETED: 10/25/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523358.2776
EASTING: 1398753.93
DRILLING METHOD: Sonic
G.S. ELEV: 643.44
M.P. ELEV: 646.51
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 32.91' BTOC
TOTAL DEPTH: 118' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
v
aa
p
DESCRIPTION
WELL CONSTRUCTION
p
L7
DQa
80
Daa
Weathered rock: Greenish gray, contains medium to coarse
o
DQa
grained sand, dry
DQa85
DQa
0
Diorite: Greenish gray, massive
90
j
95
...
-
Diorite: Black/white, competent, massive, strong
100
4 '
4 '
105
4
Diorite: Gray/black, competent, massive, strong
110
115
Borehole terminated at 118' below ground surface.
Bentonite
Holeplug
(55-103 feet
bgs)
Sand Filter
Pack(103-118
feet bgs)
2" Pre -Packed
Well Screen
(108-118feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 3 OF 3

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-28S
STARTED: 10/19/2023
COMPLETED: 10/19/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523350.3123
EASTING: 1398753.202
DRILLING METHOD: Sonic
G.S. ELEV: 643.55
M.P. ELEV: 646.33
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 31.46' BTOC
TOTAL DEPTH: 40' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
U
aLU
a p
DESCRIPTION
WELL CONSTRUCTION
p
L7
---------------------------------
Silty clay: Red to brown orange, non -plastic, cohesive, micaceous,
dry
---------------------------------
Sandy silt: Tan/brown, non -plastic, cohesive, slightly moist
---------------------------------
Sandy silt: Tan/brown, medium grained, non -plastic, cohesive,
saprolitic, slightly moist
Protective
casing with
locking cap
Aquaguard
(0-24 feet
bgs)
2" Sch 40 PVC
Riser
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 2

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-28S
STARTED: 10/19/2024
COMPLETED: 10/19/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523350.3123
EASTING: 1398753.202
DRILLING METHOD: Sonic
G.S. ELEV: 643.43
M.P. ELEV: 646.33
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 31.46' BTOC
TOTAL DEPTH: 40' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
v
aa
p
DESCRIPTION
WELL CONSTRUCTION
LU
p ..
t,
20
_
—
—
— • •
N
r�i
r.Ni
r.Ni
N
r�i
\N
r�r
rNr
rNr
r�i
/N
X
25
-
Bentonite
,-
Holeplug
(24-28 feet
bgs)
-
Sandy silt: Dark gray, fine to medium grained, non -plastic,
cohesive, saprolitic, slightly moist
30
-
Sand Filter
,-
Pack(28-40
feet bgs)
35
—
40
— •
T T
-TT
T T •
T T:
T T
— — — — — —
Silty sand: Light gray, coarse grained, consolidated, dry
Borehole terminated at 40' bgs.
::
::
2" Pre -Packed
Well Screen
(30-40 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
s mTerm Phone: [phone] PAGE 2 OF 2

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-29D
STARTED: 10/20/2023
COMPLETED: 10/31/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523317.9716
EASTING: 1399655.736
DRILLING METHOD: Sonic
G.S. ELEV: 624.90
M.P. ELEV: 627.66
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 43.59' BTOC
TOTAL DEPTH: 106' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
U
aLU
a p
DESCRIPTION
WELL CONSTRUCTION
p
L7
21
2'
31
3
41
4!
Protective
casing with
locking cap
Aquaguard
(0-54 feet
bgs)
2" Sch 40 PVC
Riser
�� SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 2

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-29D
STARTED: 10/20/2023
COMPLETED: 10/31/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523317.9716
EASTING: 1399655.736
DRILLING METHOD: Sonic
G.S. ELEV: 624.90
M.P. ELEV: 627.66
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 43.59' BTOC
TOTAL DEPTH: 106' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
U
ay
a p
DESCRIPTION
WELL CONSTRUCTION
W N
0 �
�
55
60
65
70
75
80
85
90
95
100
105
Bentonite
Holeplug
(54-91 feet
bgs)
Sand Filter
Pack(91-109
feet bgs)
2" Pre -Packed
Well Screen
(96-106 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 2 OF 2

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-29S
STARTED: 10/23/2023
COMPLETED: 10/24/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523320.0015
EASTING: 1399634.193
DRILLING METHOD: Sonic
G.S. ELEV: 625.77
M.P. ELEV: 628.70
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 45.96' BTOC
TOTAL DEPTH: 52' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
U
aLU
a p
DESCRIPTION
WELL CONSTRUCTION
p
21
2'
---------------------------------
Silty Clay: Red orange, fine grained, non -plastic, moist
---------------------------------
Silty Clay: Red to pink orange, fine grained, non -plastic, contains
sand, saprolitic, moist
---------------------------------
Clayey Silt: Pink/orange/brown, fine grained, non -plastic,
semi -cohesive, saprolitic, low moisture
Protective
casing with
locking cap
Aquaguard
(0-35 feet
bgs)
2" Sch 40 PVC
Riser
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 2

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-29S
STARTED: 10/23/2023
COMPLETED: 10/24/2023
DRILLING COMPANY: Geologic Exploration
NORTHING: 523320.0015
EASTING: 1399634.193
DRILLING METHOD: Sonic
G.S. ELEV: 625.77
M.P. ELEV: 628.70
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 45.96 ft BTOC
TOTAL DEPTH: 52' bgs
NOTES: bgs = below ground surface
LOGGED BY: G. Khang
CHECKED BY: C. Suttell
BTOC = below top of casing
U
a
a p
DESCRIPTION
WELL CONSTRUCTION
p '2
L7
30
35
Bentonite
Holeplug
(35-39.5
feet bgs)
40
Sand Filter
Pack (39.5-52
feet bgs)
45
2" Pre -Packed
Well Screen
(42-52 feet
bgs)
50
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 2 OF 2

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-30D
STARTED: 1/3/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523265.2
EASTING: 1400227.94
DRILLING METHOD: Sonic
G.S. ELEV: 595.15
M.P. ELEV: 598.44
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 30.17' BTOC
TOTAL DEPTH: 67' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
0
LULU
DESCRIPTION
WELL CONSTRUCTION
C�
10
15
20
Clay: Red, plastic, trace gravel, dry
Silty clay: Dark red, plastic, non -cohesive, moist
Clayey silt: Light red/brown, moist
'-
Sandy silt: Light brown, moist
Sandy silt: Gray, intermittent clay, moist
Protective
casing with
locking cap
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 3

PROJECT: Allen South Starter
Landfill PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-30D
STARTED: 1/3/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523265.2
EASTING: 1400227.94
DRILLING METHOD: Sonic
G.S. ELEV: 595.15
M.P. ELEV: 598.44
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 30.17' BTOC
TOTAL DEPTH: 67' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
v
0
ad
DESCRIPTION
WELL CONSTRUCTION
C
25
30
35
40
2" Sch 40 PVC
Riser
Aquaguard
(0-51 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
101 148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 2 OF 3

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-30D
STARTED: 1/3/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523265.2
EASTING: 1400227.94
DRILLING METHOD: Sonic
G.S. ELEV: 595.15
M.P. ELEV: 598.44
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 30.17' BTOC
TOTAL DEPTH: 67' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
~ w
a O
DESCRIPTION
WELL CONSTRUCTION
Lu w
J
0 �
45
50
55
60
65
"T'
'.T. T.
Silty sand: Brown gray, contains gravel, wet
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
T T
-TT
Silty sand: Fine to coarse grained, brown, wet
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
-TT
.
-TT
-
T
-T
T
T
T
-T
T
-T
-TT
.
-TT
-TT
-TT
T T
-7.TT
T T
No Recovery
Diorite: Pulverized rock, gray
Borehole terminated at 67' bgs
Bentonite
Holeplug
(51-55 feet
bgs)
Sand Filter
Pack(55-67
feet bgs)
2" Pre -Packed
Well Screen
(57-67 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 3 OF 3

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-30SA
STARTED: 04/O1/2024
COMPLETED: 04/O1/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523270.8
EASTING: 1400236.54
DRILLING METHOD: Sonic
G.S. ELEV: 594.65
M.P. ELEV: 597.66
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 31.47' BTOC
TOTAL DEPTH: 45' bgs
NOTES: bgs = below ground surface
LOGGED BY: P. Tarquinio
CHECKED BY: C. Suttell
BTOC = below top of casing
v
aa
p
DESCRIPTION
WELL CONSTRUCTION
LU
p . .
10
15
25
30
35
40
45
Clay: Red, plastic, trace gravel, dry
Clay: With silt, dark red, plastic, non -cohesive, moist
_—
Silt: With clay, light red/brown, wet
Clayey silt: Clayey silt, gray, intermittent clay, wet
Clay: Brown/gray, plastic, wet
.T T:
TT
Silty sand: Brown/gray, contains gravel, wet
-1.-1 wiiiunuiw -" vyo
Protective
casing with
locking cap
Aquaguard
(0-29 feet
bgs)
2" Sch 40 PVC
Riser
Bentonite
Holeplug
(29-33 feet
bgs)
Sand Filter
Pack(33-45
feet bgs)
2" Pre -Packed
Well Screen
(35-45 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
s mTerm Phone: [phone] PAGE 1 OF 1

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-31D
STARTED: 1/4/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523556.95
EASTING: 1400286.47
DRILLING METHOD: Sonic
G.S.ELEV: 594.02
M.P. ELEV: 596.56
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 28.67' BTOC
TOTAL DEPTH: 114' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
a
a O
DESCRIPTION
WELL CONSTRUCTION
LU
p
a
L7
Protective
casing with
locking cap
SynTerra CLIENT: Duke Energy Carolinas, LLC
1411 148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 3

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-31D
STARTED: 1/4/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523556.95
EASTING: 1400286.47
DRILLING METHOD: Sonic
G.S.ELEV: 594.02
M.P. ELEV: 596.56
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 28.67' BTOC
TOTAL DEPTH: 114' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
ay
a p
DESCRIPTION
WELL CONSTRUCTION
v
a
40
45
50
55
60
65
70
75
2" Sch 40 PVC
Riser
Aquaguard
(0-98 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 2 OF 3

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR31D
STARTED: 1/4/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523556.95
EASTING: 1400286.47
DRILLING METHOD: Sonic
G.S.ELEV: 594.02
M.P. ELEV: 596.75
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 28.67' BTOC
TOTAL DEPTH: 114' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
v
ay
a p
DESCRIPTION
WELL CONSTRUCTION
W w
J
0 �
80
85
90
95
100
105
110
Silty clay: Gray, wet
Silt: Gray, contains gravel, wet
Sand: Brown, fine to medium grained, wet
No Recovery
p
Silty clay: Dark gray, non -cohesive, wet
Weathered Rock: Gray, contains gravel, dry
Borehole terminated at 114' bas
Bentonite
Holeplug
(98-102 feet
bgs)
Sand Filter
Pack(102-114
feet bgs)
2" Pre -Packed
Well Screen
(104-114 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 3 OF 3

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-31S
STARTED: 2/20/2024
COMPLETED: 2/20/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 523553.24
EASTING: 1400280.84
DRILLING METHOD: Sonic
G.S. ELEV: 593.92
M.P. ELEV: 597.02
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 29.42' BTOC
TOTAL DEPTH: 40' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
a d
a p
DESCRIPTION
WELL CONSTRUCTION
LU
p ..
L7
21
2'
41
Protective
casing with
locking cap
Aquaguard
(0-24 feet
bgs)
2" Sch 40 PVC
Riser
Bentonite
Holeplug
(24-28 feet
bgs)
Sand Filter
Pack (28-40
feet bgs)
2" Pre -Packed
Well Screen
(30-40 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 1

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-32D
STARTED: 2/16/2024
COMPLETED: 2/19/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 524019.23
EASTING: 1400553.01
DRILLING METHOD: Sonic
G.S. ELEV: 591.72
M.P. ELEV: 594.99
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 27.71' BTOC
TOTAL DEPTH: 115' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
v
ay
a p
DESCRIPTION
WELL CONSTRUCTION
v
a
10
15
20
25
30
35
Clay: Red/brown, plastic, cohesive, dry
T T.
Silty sand: Light brown, fine grained, dry
•TT
•TT
•TT
Silty clay: Brown, non -cohesive, trace mica, moist
Clay: Brown/red, non -plastic, non -cohesive, trace saprolite, wet
T M.
Silty sand: Brown, fine grained, wet
T
T
T T
T T
T
T
T T
T
TT
.
Saprolite: Clay, brown/red, non -plastic, non -cohesive, wet
Protective
casing with
locking cap
2" Sch 40 PVC
Riser
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 3

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-32D
STARTED: 2/16/2024
COMPLETED: 2/19/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 524019.23
EASTING: 1400553.01
DRILLING METHOD: Sonic
G.S. ELEV: 591.72
M.P. ELEV: 594.99
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 27.71' BTOC
TOTAL DEPTH: 115' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
^
�
w
_ 0
a O
DESCRIPTION
WELL CONSTRUCTION
O
a
L7
40
� Saprolite: Clay, light brown, non plastic, non -cohesive, wet
45
50
Saprolite: Clay, gray, non -plastic, non -cohesive, wet
55
60
Saprolite: Sandy clay, gray, non -plastic, non -cohesive, wet
65
70
Saprolite: Silty sand, light brown/gray, fine grained, trace clay, wet
75
Aquaguard
(0-99 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 2 OF 3

PROJECT: Allen South Starter Landfill
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-32D
STARTED: 2/16/2024
COMPLETED: 2/19/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 524019.23
EASTING: 1400553.01
DRILLING METHOD: Sonic
G.S. ELEV: 591.72
M.P. ELEV: 594.99
BOREHOLE DIAMETER: 10" / 6"
DEPTH TO WATER: 27.71' BTOC
TOTAL DEPTH: 115' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
^
�
w
_ 0
a
DESCRIPTION
WELL CONSTRUCTION
O
a
L7
80
85
90
95
100
105
110
115
ON
Sandy clay: Gray, coarse grained, non -cohesive, wet
Sandy clay: Gray, fine to medium grained, non -cohesive, wet
Saprolite: Sand, light fine to medium wet
gray, grained,
M. T.
Silty sand: Gray/brown, fine to coarse grained, wet
.TT
M. T
-TT
M. T
-TT
M. T
.TT
M. T
T T
M. T
T T
M. T
.TT
.TT
'.T.'
Saprolite: Silty sand, gray, wet
Silty clay: Brown, non -cohesive, trace gravel, wet
No Recovery
Weathered rock: Gray, contains gravel, wet
Borehole terminated at 115' bqs
Bentonite
Holeplug
(99-103 feet
bgs)
Sand Filter
Pack (103-115
feet bgs)
2" Pre -Packed
Well Screen
(105-115 feet
bgs)
SynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE 3 OF 3

PROJECT: CCR Well Installation
PROJECT NO: 00.0082.51
WELL/BORING NO: CCR-32S
STARTED: 2/19/2024
COMPLETED: 2/19/2024
DRILLING COMPANY: Geologic Exploration
NORTHING: 524019.72
EASTING: 1400544.31
DRILLING METHOD: Sonic
G.S. ELEV: 591.91
M.P. ELEV: 595.13
BOREHOLE DIAMETER: 6"
DEPTH TO WATER: 27.45' BTOC
TOTAL DEPTH: 45' bgs
NOTES: bgs = below ground surface
LOGGED BY: C. Skidmore
CHECKED BY: C. Suttell
BTOC = below top of casing
U
ay
a p
DESCRIPTION
WELL CONSTRUCTION
v
a
10
15
20
25
30
35
40
45
Clay: Red/brown, plastic, cohesive, dry
T T:
Silty sand: Light brown, fine grained, dry
•TT
•TT
Silty clay: Brown, non -cohesive, trace mica, moist
Clay: Brown/red, non -plastic, non -cohesive, trace saprolite, wet
T T:
Silty sand: Brown, fine grained, wet
-TT
-TT
T T
•7.TT
T T
Saprolite: Clay, brown/red, non -plastic, non -cohesive, wet
•
•
•
•
Saprolite: Clay, light brown, non -plastic, non -cohesive, wet
•
•
•
Borehole terminated at 45' bgs
Protective
casing with
locking cap
Aquaguard
(0-29 feet
bgs)
2" Sch 40 PVC
Riser
Bentonite
Holeplug
(29-33 feet
bgs)
Sand Filter
Pack (33-45
feet bgs)
2" Pre -Packed
Well Screen
(35-45 feet
bgs)
tipSynTerra CLIENT: Duke Energy Carolinas, LLC
148 River Street, Suite 220 PROJECT LOCATION: Gaston County, NC
Greenville, South Carolina 29601
synTerm Phone: [phone] PAGE i OF 1