6004_McGuire_LFGasReport_FID1787681_20230413

(� DUKE
ENERGY.)
April 13, 2023
North Carolina Department of Environmental Quality
Division of Waste Management
Solid Waste Section
1646 Mail Service Center
Raleigh, North Carolina 28778
Attn: Ms. Sarah Moutos (submitted electronically)
Re: Landfill Gas Sampling Report
Duke Energy Carolinas, LLC
McGuire Nuclear Station
Landfill No. 1 (Unlined), Permit #60-04
Dear Ms. Moutos:
Duke Energy
McGuire Nuclear Station
12700 Hagers Ferry Road
Huntersville, NC 28078
Duke Energy is providing the enclosed Landfill Gas Sampling Report for the Duke Energy Carolinas, McGuire,
Landfill No. 1 (Unlined), located near Huntersville, North Carolina.
On December 13-14, 2022, landfill gas sampling occurred in accordance with Work Plan for Landfill Gas
Sampling, dated October 5, 2022, prepared by S&ME, and approved by the Division on October 31, 2022.
The collection of landfill gas data is to support the design of the voluntary amended final cover system (i.e.,
geosynthetic cap) for the landfill. Landfill gas data was collected from 24 landfill gas implants that were
installed temporarily for this study. Landfill gas field screenings were conducted at each implant location, and
landfill air samples were collected from five of the implant locations. The analytical results are included
herein.
Based on the landfill gas sampling results summarized in this report, the updated final cover system design
will include landfill gas vents to aid in the reduction of damage to the geosynthetic cap and lateral gas migration
from the landfill. The landfill gas vent design will follow the details and drawings included in the Amended
Closure and Post Closure Care Plan for Landfill No. 1 (Section 2.9 and Drawings 16 and 19), dated September
7, 2022, and pending review by the Division. To ensure compliance with 15A NCAC 13B, Sections .1626 and
.1627, a landfill gas monitoring plan for the landfill will be submitted to the Division upon completion of the
geosynthetic cap construction.
If you need additional information regarding this submittal, please contact Ashley Healy at
Ashley. Healy a)duke-energy.com or [phone].
Sincerely,
fz-�o
Brent Bare
Duke Energy
McGuire Nuclear Station
Plant Manager
www.duke-energy.com Page 1 of 1

Landfill Gas Sampling Report
Duke Energy — McGuire Nuclear Station — Landfill No. 1
(Permit No. 6004-INDUS-1981)
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048

February 29 2023
Duke Energy Carolinas, LLC
526 South Church Street
Charlotte, NC 29111
Attention: Ms. Ashley Healy, P.G. via email: [e-mail]
EHS Waste and Groundwater Programs
Reference: Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station
13339 Hagers Ferry Road, Huntersville, North Carolina
S&ME Project No. 22350048
Dear Ms. Healy:
S&ME, Inc. (S&ME) is submitting the enclosed report with results of landfill gas sampling activities conducted at
the above -referenced site in Huntersville, North Carolina. S&ME completed this investigation in general
conformance with S&ME Proposal No. 22350048A, Change Order CO-01_Rev -1 dated September 20, 2022, and
with S&ME Workplan dated October 5, 2022, and approved by NCDEQ on October 31, 2022. Duke Energy is
voluntarily capping Landfill # 1 at the McGuire Nuclear Station, with a 40-mil LLDPE geomembrane cover. This
report summarizes landfill gas probe installations, screening, and sampling intended to evaluate whether landfill
gas vents may be necessary in the final cover system design and whether landfill gas monitoring may be necessary
during the post -closure period, with the updated final cover system.
We appreciate the opportunity to provide environmental consulting services to Duke Energy. Please contact the
undersigned if you have any questions about the information included in this report.
Sincerely,
S&ME, Inc.
Laura Beth Slagle
Environmental Staff Professional
[e-mail]
Samuel P. Watts, P.G.
Principal Geologist/ Senior Environmental Consultant
[e-mail]
NC Licensed Geologist No. 1806
cc: Jamie Lineberger, Earnhardt Grading ([e-mail])
S&ME, Inc. 12016 Ayrsley Town Boulevard, Suite 2-A I Charlotte, NC 28273 1 p 704.523.4726 1 www.smeinc.com

Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
CERTIFICATION
Landfill Gas Sampling Report
Duke Energy — McGuire Nuclear Station — Landfill No. 1
(Permit No. 6004-INDUS-1981)
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
On this day, /�/ArG/l 2 g� Zy23 I, Samuel P. Watts a Licensed Geologist for S&ME, Inc. , do
hereby certify this report was prepared by me or under my direct supervision.
aL3
Senior Geologist
NC Licensed Geologist No. 1806
S&ME, Inc. is licensed to practice engineering in North Carolina. The firm's license number is C-145.
S&ME, Inc. is licensed to practice geology in North Carolina. The firm's license number is F-0176.
March 29, 2023

s Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
Table of Contents
CERTIFICATION....................................................................................................................... ii
ExecutiveSummary.................................................................................................................. iv
1.0 Background Information.................................................................................................1
2.0 Field Services.....................................................................................................................1
2.1 Gas Implant Installation................................................................................................................1
2.2 Landfill Gas Field Screening.........................................................................................................2
2.2.1 Landfill Gas Screening Methods....................................................................................................... 2
2.2.2 Volatile Organic Compounds............................................................................................................2
2.2.3 Methane.............................................................................................................................................2
2.2.4 Hydrogen Sulfide..............................................................................................................................3
2.3 Landfill Gas Sample Collection and Analysis............................................................................ 3
2.3.1 Leak Testing...................................................................................................................................... 3
2.3.2 Sample Collection..............................................................................................................................3
2.3.3 Analytical Results.............................................................................................................................4
3.0
Investigative Derived Waste and SGI Abandonment...............................................4
4.0
Deviations from Scope.....................................................................................................4
5.0
Discussion - Landfill Gas Generation and Migration...............................................4
LandfillGas Generation..................................................................................................................................... 4
LandfillGas Migration.......................................................................................................................................5
6.0
Conclusions & Recommendations.................................................................................5
7.0
Sole Use Statement...........................................................................................................6
Appendices
Appendix I -
Figures
Appendix II - Tables
Appendix III
- Solid Waste Section Approval of Work Plan
Appendix IV
- Field Notes and Photographs
Appendix V -
Laboratory Reports and Chains of Custody
Appendix VI
- North Carolina Solid Waste Regulations
March 29, 2023

s Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
Executive Summary
Landfill #1 is located at 13339 Hagers Ferry Road, Huntersville, Mecklenburg County, North Carolina, and is owned
by Duke Energy. Landfill #1 has a footprint area of approximately 12 acres. A site map depicting the aerial extent
of the landfill, with the sampling locations, is provided as Figure 1. A table with the coordinates of the sampling
locations is included in Table 1. The application for the landfill was originally submitted in 1972 to accept
construction material and other wastes including paper, cans, lunch box scrap and fish waste. Additional disposal
of oil absorbent materials, carbon granules, sludge, borax, diatomaceous earth, and ion exchange resins were
permitted under a case -by -case basis. This landfill was permitted in 1981 (Permit No. 60-04). Closure of the
Landfill was completed in 1993 with construction of an earthen cover consisting of approximately two feet of
compacted soil.
On December 13, 2022, S&ME installed 24 landfill gas implants at the subject property. The construction of the
implants is included in Table 2. Following installation, S&ME conducted field screening for landfill gases at each
implant location. The landfill gas field screening results are included in Table 3. On December 14, 2022, S&ME
collected air samples from five landfill gas implants and submitted the samples for laboratory analysis of Fixed
Gases by EPA Method 3C and Sulfurs by EPA Method TO-15 Modified. The analytical results are included in Table
4.
Field screening and laboratory analysis, detected methane gas above the lower explosive limit (LEL) at McGuire
Landfill #1. The composition and concentrations of landfill gasses indicate that methanogenesis and anaerobic
decomposition are occurring within the landfill, at a strong rate, and should be expected to continue for the near
future.
Data collected from this sampling event does not suggest the closed landfill is currently out of compliance
regarding explosive gas control. However, placement of an upgraded, low -permeability geomembrane cover on
the landfill would likely result in the buildup of landfill gas beneath the cover system, possibly resulting in the
following:
♦ damage to the cover system and
♦ increased lateral migration of explosive gases from the landfill.
Based on the landfill gas sampling results, S&ME recommends the updated final cover system design include
landfill gas vents. S&ME also recommends performing landfill gas monitoring around the perimeter of the landfill
during the post -closure period, until such time as the potential for lateral migration of landfill gas has been
determined to be in compliance with 15A NCAC 13B, Sections .1626 and .1627 of the North Carolina Solid Waste
regulations.
March 29, 2023 iv

i Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
1.0 Background Information
Landfill #1 is located at 13339 Hagers Ferry Road, Huntersville, Mecklenburg County, North Carolina, and
is owned by Duke Energy. Landfill #1 has a footprint area of approximately 12 acres. The application for
the landfill was originally submitted in 1972 to accept construction material and other wastes including
paper, cans, lunch box scrap and fish waste. Additional disposal of oil absorbent materials, carbon
granules, sludge, borax, diatomaceous earth, and ion exchange resins were permitted under a case -by -
case basis. This landfill was permitted in 1981 (Permit No. 60-04). Closure of the Landfill was completed in
1993 with construction of an earthen cover consisting of approximately two feet of compacted soil. soil.
Duke Energy is voluntarily capping Landfill # 1 at the McGuire Nuclear Station, with a 40-mil LLDPE
geomembrane cover reduce infiltration from precipitation through the landfill waste mass. On behalf of
Duke Energy, S&ME has collected landfill gas measurements and laboratory data to support facility
closure and post -closure design, by evaluating whether landfill gas vents would be necessary in the final
cover system design and whether landfill gas monitoring would be necessary during the post -closure
period, with the updated final cover system.
S&ME conducted the landfill gas sampling in accordance with Work Plan for Landfill Gas Sampling, dated
October 5, 2022, prepared by S&ME, and approved by the North Carolina Department of Environmental
Quality (DEQ), Division of Waste Management (DWM), Solid Waste Section (SWS) on October 31, 2023. A
copy of the SWS approval letter is included in Appendix III.
2.0 Field Services
2.1 Gas Implant Installation
On December 13, 2022, 24 temporary landfill gas implants were installed at the locations shown on
Figure 1. Location coordinates for each gas implant are included in Table 1. Implant construction details
including total depth, bentonite, and sand pack intervals are included in Table 2. Photographs of field
sample collection are included in Appendix IV. The gas implants were installed as follows:
Using direct push techniques via a track -mounted Geoprobe(D rig, S&ME installed 24 gas
implants in general conformance with Geoprobe's "Implants Operation" manual, as referenced in
S&ME's Work Plan for Landfill Gas Sampling, dated October 5, 2022, and approved by NCDEQ on
October 31, 2022.
The probe rods were extended to a depth of at least 10 feet below ground surface (ft-bgs). At
locations where refusal was encountered significantly less than the proposed termination depth of
10 ft-bgs, the original boring was abandoned and a new boring was conducted adjacent to the
original location.
Polyethylene tubing was attached to the sampling implant and the implant was set at the
terminus of the borehole.
March 29, 2023

s Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
2.2 Landfill Gas Field Screening
2.2.1 Landfill Gas Screening Methods
Following installation, all 24 landfill gas probes were screened for landfill gas on December 13, 2022.
Portable meters were used to collect the following parameters at each gas probe and background
screening location:
Photo -Ionization Detector (PID) MiniRAE 3000 for total volatile organic compounds (VOCs)
Landfill Gas Meter — GEM 5000 Plus for:
♦ methane:0-100%
♦ hydrogen sulfide: 0-500 ppmv
♦ carbon dioxide: 0-100%
♦ oxygen:0-25%
♦ barometric pressure
Each of the meters listed above has an internal pump, which was used to draw air samples from the gas
probe through the portable meters. New polyethylene tubing was connected from the meters to each
soil gas probe cap for sampling.
A thermohygrometer was used to measure ambient air for humidity and temperature. Ambient humidity
and temperature is sometimes used in determining air quality in during testing applications, when
humidity and temperature might affect test results.
Instruments were calibrated in the field following manufacturer recommendations for each instrument. A
summary of field calibration procedures used performed during sampling was documented on the field
sample forms included in Appendix IV.
2.2.2 Volatile Organic Compounds
The total VOC detections, as measured with the PID, ranged from 0.0 to 19.0 parts per million by volume
(ppm-v), with the highest concentration detected in soil gas implant SGI-11 at 19.0 ppm-v. VOC
screening results are summarized in Table 3.
2.2.3 Methane
Methane was detected at concentrations ranging from 0.1% to 65.6%. For reference, methane screening
results are summarized in Table 3 and shown on Figure 2 and are compared to the lower explosive limit
(LEL) for methane. At 12 of the 24 SGIs screened, methane was detected above its LEL.
March 29, 2023 2

s Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
2.2.4 Hydrogen Sulfide
Hydrogen sulfide was detected in six of the 24 SGIs. Hydrogen Sulfide was detected at concentrations
ranging from 0 — 13 ppm with the highest concentration detected in soil gas implant SGI-6 at 13 ppm.
Hydrogen Sulfide screening results are summarized in Table 3.
2.3 Landfill Gas Sample Collection and Analysis
On December 14, 2022, S&ME mobilized to the site to collect five samples from the soil gas implants with
the highest detections of landfill gas recorded during field screening.
2.3.1 Leak Testing
Prior to sample collection S&ME proposed to perform the following leak test by attaching a brass T-
connector to the end of polyethylene tubing and connecting a section of Teflon tubing to one part of the
T-connector and another section will be attached to a batch -certified, 6-liter summa canister. A plastic
shroud will be placed overtop the SAMPLE tubing array and summa canister. The other section of tubing
from the T-connector will be fitted through the shroud and attached to a helium detector. S&ME will then
inject helium (tracer) gas into the plastic shroud. The sampling array will be monitored for leaks by
monitoring for the presence of helium gas concentrations within the tubing. If the tracer gas is not
detected through the sampling array, then the sampling array will be considered leak free. If leaks are
detected, the sampling array will be re -built and re -tested for leaks.
However, during the first leak test at soil gas implant SGI-22 S&ME followed the proposed leak test
protocol but did not pass the leak test. S&ME rebuilt the sample train, purged the soil gas implant and
conducted the proposed leak test twice more and did not pass the leak test. S&ME removed the leak test
shroud and connected the helium detector to the soil gas implant directly. The helium detector indicated
gases were being detected from the soil gas implant at levels that would fail a leak test. S&ME collected
readings from each sample point and confirmed all soil gas implants were producing gas readings that
would produce a failing leak test. S&ME could not accurately complete leak tests at each soil gas implant
and proceeded without conducting leak testing as proposed at each sampling point. A photograph of the
SUMMA canister and typical sample train are included in Appendix IV.
2.3.2 Sample Collection
On December 14, 2022, S&ME collected five landfill gas samples from soil gas implants SGI-6, SGI-7, SGI-
8, SGI-13, and SGI-21 which were the locations with the highest landfill gas detections recorded during
field screening on December 13, 2022.
Prior to sample collection, three volumes of air were purged from each soil gas implant. After purging the
sampling array, the valve to the 6-liter summa canister was opened to allow the collection of a landfill gas
sample. S&ME allowed the sample to run for 1-hour or before the regulator pressure read 5 pounds per
square inch (PSI). The sample collection run times, canister and regulator IDs are included on the sample
collection forms included in Appendix IV.
March 29, 2023

Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
•" Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
S&ME shipped the samples under standard chain -of -custody protocol to Enthalpy Analytical (Enthalpy)
for analysis by Fixed Gases (H2, N2, 02, CO, CO2, CH4) by EPA Method 3C and Sulfurs by EPA Method TO-
15 Modified.
2.3.3 Analytical Results
Methane, hydrogen sulfide, carbon dioxide, nitrogen and oxygen were detected in the landfill gas samples
submitted for laboratory analysis. Methane was detected above its LEL in four of the five samples
analyzed. Detected concentrations of hydrogen sulfide, carbon dioxide, nitrogen and oxygen were typical
for municipal solid waste (MSW) landfills. The analytical results are included in Table 4. The laboratory
analytical report is included in Appendix V.
3.0 Investigative Derived Waste and SGI Abandonment
No impacted media (soil cuttings or groundwater) or other investigative derived wastes (e.g., landfill
waste mass) were encountered or generated during the investigation. Soil from installation of the SGIs
was used to plug/backfill each of the borings, when abandoned. Following sample collection from the
SGIs, S&ME abandoned the SGIs in -place.
4.0 Deviations from Scope
On behalf of Duke Energy, S&ME submitted Work Plan for Landfill Gas Sampling, dated October 5, 2022.
The Work Plan was approved by NCDEQ on October 31, 2022. As discussed in Section 2.3.1, S&ME could
not accurately complete leak tests at each soil gas implant and proceeded without conducting leak testing
as proposed. No other deviations were made from the approved Work Plan during the landfill gas
sampling.
5.0 Discussion - Landfill Gas Generation and Migration
Landfill Gas Generation
Landfill gas is a natural by-product of the anaerobic bacterial decomposition of organic waste in a landfill.
The composition, quantity, and rate of landfill gas generation are dependent on the types of waste that
are decomposing and a number of environmental factors that affect the level of microbial activity within
the wastes (e.g., presence of oxygen in the landfill, moisture content, and temperature). The
decomposition of biodegradable waste begins with aerobic decomposition which lasts until the oxygen in
the landfill is depleted. The anaerobic phase then begins, resulting in landfill gas production. Landfill gas
is typically composed of roughly 45-60% methane (CH4), 40-60% carbon dioxide (CO2) and a small
amount of trace gases (non -methane organic compounds, ammonia, sulfides, etc.).
Hydrogen sulfide (H2S) is produced in landfill either when sulfur -containing landfilled material breaks
down via anaerobic decomposition, and/or when sulfate -reducing bacteria (SRB) oxidize organic
March 29, 2023 4

Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
•" Duke Energy - McGuire Nuclear Station - Landfill No. 1
�a Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
substrates and use sulfate as the terminal electron acceptor. H2S is a colorless, poisonous, and flammable
gas that has a pungent odor of rotten eggs. H2S has no bearing on the whether landfill gas vents may be
necessary in the final cover system design and whether landfill gas monitoring may be necessary during
the post -closure period, with the updated final cover system. Information on H2S is provided for health
and safety awareness. H2S is heavier than air and may be an asphyxiation hazard in excavations/borings
into landfill waste. Exposure to low levels of H2S can cause irritability, watery eyes, asthmatic symptoms
and headaches. The Occupational Safety and Health Administration (OSHA) legal airborne permissible
exposure limit (PEL) is 20 ppm not to be exceeded at any time, and 50 ppm as a maximum peak, not to be
exceeded during any 10-minute work period.
Landfill Gas Migration
The production of landfill gas creates a positive pressure within the landfill that forces the gas to migrate.
Landfill gas migrates by diffusion and pressure gradient and will follow the path of least resistance.
Several factors affect landfill gas generation and migration through the subsurface. The production of
landfill gas is directly related to the amount of organic matter present in waste.
Gas is created under the landfill surface and generally moves away from the landfill, either by rising up
through the landfill surface or migrating underground to surrounding areas. Three main factors influence
gas migration in a landfill:
Permeability. Gas flows through areas of least resistance. If one side of the landfill is very
permeable, then gas will likely migrate from that area of the landfill. Artificial channels such as
buried utilities and trenches can facilitate gas migration. Subsurface gas typically migrates above
the groundwater table and is typically restricted laterally by streams.
Diffusion. Gas moves to areas with lower gas concentrations. Gas concentrations are generally
lower in areas surrounding the landfill.
Pressure. Gas moves to areas of lower pressure. The pressure of the surrounding areas (e. g.,
changing weather conditions) will affect gas movement from the landfill.
The type or presence of landfill cover can influence landfill gas generation and migration. Although a low
permeability cap will typically reduce moisture and landfill gas generation over the longer term, initially,
the installation of a landfill cap could drive landfill gas migration further from the landfill in the subsurface
without proper ventilation (either passive or active). This is especially true in the case of unlined,
unvented landfills.
6.0 Conclusions & Recommendations
Through field screening and laboratory analysis, S&ME has measured methane gas, at McGuire Landfill
#1, at concentrations greater than the LEL. The composition and concentrations of landfill gases indicate
that methanogenesis and anaerobic decomposition are occurring within the landfill and should be
expected to continue for the near future.
March 29, 2023

i Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
Data collected from this sampling event does not suggest the closed landfill is currently out of compliance
regarding explosive gas control. However, placement of an upgraded, low -permeability geomembrane
cover on the landfill would likely result in the buildup of landfill gas beneath the cover system, possibly
resulting in the following:
damage to the cover system and
increased lateral migration of explosive gases from the landfill.
Based on the landfill gas sampling results, S&ME recommends the updated final cover system design
include landfill gas vents. S&ME also recommends performing landfill gas monitoring around the
perimeter of the landfill during the post -closure period, until such time as the potential for lateral
migration of landfill gas has been determined to be in compliance with 15A NCAC 13B, Sections .1626 and
.1627 of the North Carolina Solid Waste regulations.
After consultation with NCDEQ, plans for gas vents in the final cover system design and a landfill gas
monitoring plan may be submitted under separate cover. Applicable sections of current North Carolina
Solid Waste Section Rules pertaining to landfill gas monitoring are included in Appendix VI.
7.0 Sole Use Statement
This report is solely intended for use by Duke Energy, Earnhardt Grading, and NCDEQ for the services that
were performed in accordance with S&ME Proposal No. 22350048A, Change Order CO-01_Rev -1 dated
September 20, 2022, and with S&ME's Work Plan for Landfill Gas Sampling, dated October 5, 2022, and
approved by NCDEQ on October 31, 2022.
March 29, 2023 6

Appendices

Appendix I - Figures

Appendix II - Tables

TABLE 1
Coordinates of Selected Features
McGuire Landfill No.1 (Permit No. 6004-INDUS-1981)
Huntersville, North Carolina
S&ME Project No. 22350048
Site Feature
Type
Location
Latitude
Longitude
Northing
Easting
SGI-1
Landfill Gas Implant
35.413267
-80.951072
611047.9422
1418713.716
SGI-2
Landfill Gas Implant
35.413439
-80.950877
611109.2237
1418773.156
SGI-3
Landfill Gas Implant
35.412918
-80.950929
610919.9876
1418754.059
SGI-4
Landfill Gas Implant
35.413216
-80.950838
611027.823
1418783.285
SGI-5
Landfill Gas Implant
35.413577
-80.950589
611157.8348
1418859.962
SGI-6
Landfill Gas Implant
35.412975
-80.95065
610939.0848
1418837.392
SGI-7
Landfill Gas Implant
35.413341
-80.950438
611071.0293
1418903.364
SGI-8
Landfill Gas Implant
35.412631
-80.950671
610814.08
1418828.712
SGI-9
Landfill Gas Implant
35.413022
-80.950383
610954.7098
1418917.253
SGI-10
Landfill Gas Implant
35.41336
-80.950164
611076.2376
1418984.962
SGI-11
Landfill Gas Implant
35.412632
-80.950304
610812.3487
1418938.087
SGI-12
Landfill Gas Implant
35.413144
-80.949961
610996.3765
1419043.989
SGI-13
Landfill Gas Implant
35.412231
-80.950335
610666.5154
1418925.934
SGI-14
Landfill Gas Implant
35.412857
-80.949694
610890.3492
1419121.309
SGI-15
Landfill Gas Implant
35.412038
-80.949853
610593.5987
1419068.295
SGI-16
Landfill Gas Implant
35.412396
-80.949593
610722.0709
1419148.156
SGI-17
Landfill Gas Implant
35.412702
-80.949222
610831.4459
1419261.003
SGI-18
Landfill Gas Implant
35.412136
-80.949144
610624.8487
1419280.101
SGI-19
Landfill Gas Implant
35.412413
-80.948801
610723.807
1419384.267
SGI-20
Landfill Gas Implant
35.411904
-80.948730
610538.0431
1419401.628
SGI-21
Landfill Gas Implant
35.412174
-80.948271
610633.5293
1419540.517
SGI-22
Landfill Gas Implant
35.411916
-80.947956
610538.0431
1419632.531
SGI-23
Landfill Gas Implant
35.411511
-80.948861
610395.682
1419359.962
SGI-24
Landfill Gas Implant
35.411378
-80.948467
610345.3348
1419476.281 11
Notes:
Site feature locations are reported in decimal degrees for Lattitude/Longitude and in feet in the North Carolina State
Plane Coordinate System (NAD83).

ir:1:j1M
Landfill Gas Implant Construction Details
McGuire Landfill No.1 (Permit No. 6004-INDUS-1981)
Huntersville, North Carolina
S&ME Project No. 22350048
ID
Date
Installed
Type
Total Depth
(ft-bgs)
Bentonite Interval
(ft-bgs)
Filter Pack Interval
(ft-bgs)
SGI-1
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-2
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-3
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-4
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-5
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-6
12/13/22
Implant
9.0
1.0
to
6.0
6.0
to
9.0
SGI-7
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-8
12/13/22
Implant
7.5
0.5
to
4.5
4.5
to
7.5
SGI-9
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-10
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-11
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-12
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-13
12/13/22
Implant
9.0
1.0
to
6.0
6.0
to
9.0
SGI-14
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-15
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-16
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-17
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-18
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-19
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-20
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-21
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-22
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-23
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
SGI-24
12/13/22
Implant
10.0
1.0
to
5.0
5.0
to
10.0
Notes:
ft-bgs: feet below ground surface.

TABLE 3
Landfill Gas Field Screening
McGuire Landfill No. 1 (Permit No. 6004-INDUS-1981)
Huntersville, North Carolina
S&ME Project No. 22350048
Sample
Location ID
Date
Field Parameters
VOcs
(ppm-v)
Methane
Hydrogen Sulfide
(% Vol.)
(% LEL)
(ppm-v)
SGI-1
12/13/2022
7.7
0.2
4.0
0
SGI-2
12/13/2022
1.1
9.6
>100
1
SGI-3
12/13/2022
3.6
14.7
>100
0
SGI-4
12/13/2022
11.4
0.3
6.0
0
SGI-5
12/13/2022
10.4
14.0
>100
0
SGI-6
12/13/2022
1.3
33.8
>100
13
SGI-7
12/13/2022
5.4
18.3
>100
2
SGI-8
12/13/2022
0.0
44.2
>100
4
SGI-9
12/13/2022
10.5
1.4
28.0
0
SGI-10
12/13/2022
13.2
0.1
2.0
0
SGI-11
12/13/2022
19.0
13.8
>100
1
SGI-12
12/13/2022
8.0
3.3
66.0
0
SGI-13
12/13/2022
0.1
65.6
>100
1
SGI-15
12/13/2022
0.0
11.8
>100
0
SGI-16
12/13/2022
4.0
0.2
4.0
0
SGI-17
12/13/2022
3.7
0.1
2.0
0
SGI-18
12/13/2022
2.5
0.1
2.0
0
SGI-19
12/13/2022
1.8
0.1
2.0
0
SGI-20
12/13/2022
0.5
18.3
>100
0
SGI-21
12/13/2022
0.1
38.6
>100
0
SGI-22
12/13/2022
2.0
9.1
>100
0
SGI-23
12/13/2022
2.2
0.4
8.0
0
SGI-24
12/13/2022
0.8
0.3
6.0
0
Explosive Limit
(percent by volume in air)
NA
5% - 17%
NA
NA
Notes:
VOCs: Volatile Organic Compounds
LEL: Lower Explosive Limit
ppm-v: Parts Per Million by Volume
NA: Not Applicable
Value : Highlighted cels indicate concentration is greater than the LEL.
(1) The explosive range of hydrogen sulfide in air is 4.5% - 45.5% (volume in air), which is much higher than the
OSHA enforceable permissible exposure limit (PEL). The OSHA legal airborne PEL is 20 ppm not to be exceeded at
any time, and 50 ppm as a maximum peak, not to be exceeded during any 10-minute work period.

Q TABLE 4
I I I Summary of Soil Gas Sample Analytical Results
McGuire Landfill No.1 (Permit No. 6004-INDUS-1981)
Huntersville, North Carolina
S&ME Project No. 22350048
EPA Method
Analytical Method -->
EPA Method 3C
TO-15
�
a
Analytes -->
c
0
a
>
a
3
>
Ile
�
160
o
>
{n
-0
v
Date
O
"
0
3
Sample ID
Collected
�°
0-a
°
,—�
V
Z
O
2
c
H
SGI-6
12/14/2022
21.6
13.5
54
7.39
732
732
SGI-7
12/14/2022
11.9
9.97
67.9
5.57
<360
<360
SGI-8
12/14/2022
2.43
10.4
77.5
6.97
<360
<360
SGI-13
12/14/2022
50.5
19.9
21
3.67
884
884
SGI-21
12/14/2022
58.2
7.88
23.4
4.82
<450
<450
Explosive Limit
5% - 17%
NA
NA
NA
NA (1)
NA
(percent by volume in air)
Notes:
ppb-v: Parts Per Billion by Volume
% vol.: Percent by Volume
Constituents not shown were not detected above the laboratory reporting limit. Refer to laboratory report for complete analytical results.
Value : Highlighted cells indicate concentration is greater than the lower explosive limit (LEL).
(1) The explosive range of hydrogen sulfide in air is 4.5% - 45.5% (volume in air), which is much higher than the OSHA enforceable permissible
exposure limit (PEL). The OSHA legal airborne PEL is 20 ppm not to be exceeded at any time, and 50 ppm as a maximum peak, not to be
exceeded during any 10-minute work period.

Appendix III - Solid Waste Section Approval of Work Plan

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
MICHAEL SCOTT
Director
Emailed: Ashley. H ealy@)duke-energyy.com
Mrs. Ashley Healy, P.G.
EHS Waste and Groundwater Programs
Duke Energy
526 South Church Street
Charlotte, NC 28202
NORTH CAROLINA
Environmental Quality
October 31, 2022
RE: Approval — Work Plan for Landfill Gas Sampling
McGuire Landfill No. 1, permit 6004-INDUS-1981
Mecklenburg County, FID 1741299
Dear Mrs. Healy,
The Division of Waste Management — Solid Waste Section (Section) is in receipt of the October 5, 2022 Work Plan
for Landfill Gas Sampling associated with the capping of Landfill #1 at the McGuire Nuclear Station with a 40-mil
LLDPE Geomembrane cover, FID 1741298. This Work Plan is intended to collect landfill gas measurements and
laboratory data to support facility closure and post -closure design, by evaluating whether landfill gas vents would
be necessary in the final cover system design and whether landfill gas monitoring would be necessary during the
post -closure period, with the updated final cover system. Duke Energy's consultant, S&ME, plans on installing 24
soil gas implants for the field screening of methane and hydrogen sulfide as depicted in Figure 1 and 2.
Volatile organic compounds (VOCs) exceeding state regulatory standards have been reported, at the landfill review
boundary, during the semi-annual groundwater monitoring events. Duke Energy conducted a site characterization
at the site which concluded an upgraded closure cap on Landfill #1 could serve as a proactive measure to
significantly reduce infiltration from precipitation through the landfill waste mass, thus limiting constituent of
concern migration to groundwater.
The Section has reviewed and concurs with the work plan to field screen the soil for landfill gas constituents. Please
let us know if we can be of further assistance.
Sincerely,
Sarah M Moutos
Environmental Program Consultant
Division of Waste Management — Solid Waste Section
ec: Duke Energy - Murphy, Courtney; Ballard, John G
Beaver, Gregory T; Hardin, Tyler
Witt, Kimberlee; Sullivan, Ed M
Scronce, Dennis L; Clark, Marcus
S&ME — Watts, Sam; Korleski, Sharon
Earnhardt Grading - Linerberger, Jamie
DWM — SWS Coal Ash Team
E Q North Carolina Department of Environmental Quality I Division of Waste Management
_ 217 West Jones Street 1 1646 Mail Service Center I Raleigh, North Carolina 27699-1646
NORTH CAROLINA
oeeammeat of En,im,meaai auaKy /`� 919.707.8200

MCGUIRE
S
NUCLEAR
1
5
STATION
1{
1
II
}
1
SITE LOCATION
CL
a
1
♦
. _ - _ _ . _. _ R _ f_ _ .-_ . _ . _ . -
`_ __._._._._._`_
0 150 300 Feet
I � 1
—._.� Monitoring Wells
Property Boundary I— 250-ft Compliance Boundary Basal Saprolite/
Landfill Limit of Waste L Transition Zone Well
L_ _A OO Passive Soil Gas Sample Location Bedrock Well
I_ ! Review Boundary
Creeks/Streams Shallow Well
s ;
` R
S '�•y
Q5
• G
0 Trench Locations TOTAL VOC CONCENTRATIONS IN PSG SAMPLES
Total VOC Concentration (ug/L) AND SITE GEOPHYSICS
Geophysics - EM Response 6004-INDUS DUKE ENERGY CAROLINAS DUKE
Background Response High: 11.11 Notes: LANDFILL NO.1 (MCGUIRE)
Back ��
9 P PSG = Passive Soil Gas 4 ENERGY,
NS =Not Sampled MECKLENBURG COUNTY, NORTH CAROLINA
Elevated Response Low: 0.85 EM= Electromagnetic PROJECT NO: FIGURE NO:

Appendix IV - Field Notes and Photographs

LANDFILL GAS SCREENING FORM
Project Name: McGuire Nuclear Station -Landfill No. 1 Location: 13339 Hagers Ferry Road, Huntersville, NC
&
IIUJ
Meter Type/ Meter Name/ Serial No.: _
s
Gas Analyzer GEM 5000 G507520 S
NCDEQ ID No.: Permit No. 6004-INDUS-1981 Date: 12/13/22-12/14/22
S&ME Project No.: 22350048A Weather: Overcast
PID
Mini Rae 3000
Pgm7320
Pre Calibration Time: 1045
Task Order: NA S&ME Personnel: LB Slagle / Matt Brundage
Thermo Hygrometer
UEI OTH 10
10605321
Post Calibration Time: 1650
PRE Equipment Calibration
Calibration Notes
POST Equipment Calibration
PID (Isobutylene)
0 ppm =
0
100 ppm =
100
H2S reading at 5 ppm,
should be 10 ppm as
the calibration gas was
at 10 ppm.
PID (Isobutylene)
0 ppm =
0
100 ppm =
100
Fresh Air
CH4 (0%) =
0.1
OZ (20.9%) =
21.5
Fresh Air
CH4 (0%) =
0.2
Oz (20.9%) =
21.6
Methane High
CH4 (50%) =
49
CO2 (35%) =
35.1
Methane High
CH4 (50%) =
49.1
CO2 (35%) =
35
Oz (0%) =
0.1
OZ (0%)=
0.1
H25 Mix
CH4 (2.5%) =
2.5
Oz (18%) =
18.5
H25 Mix
CH4 (2.5%) =
2.5
OZ (18%) =
18.6
HzS (10 ppm) =
5
CO (50 ppm) =
48
HZS (10 ppm) =
5
(50 ppm) =
48
_+_CO
Screening Data
Sample Location
Time
VOCs
Methane
Carbon Dioxide
Oxygen
Hydrogen Sulfide
Barometric Pressure
Temperature
Humidity
ID
hr:min
ppm-v
%
volume in air (%)
% LEL
(100% LEL = 5%
H4
%
%
ppm-v
in-Hg
°F
%
SGI-22
10:55
2.0
9.1
182
4.1
4.5
0
29.43
40.0
51.2
SGI-20
11:21
0.5
18.3
366
7.8
0.1
0
29.42
40.0
50.5
SGI-23
11:30
2.2
0.4
8
1.9
14.5
0
29.43
41.0
49
SGI-24
11:45
0.8
0.3
6
1.0
19.7
0
29.43
42.0
48.6
SGI-21
11:55
0.1
38.6
772
7.0
4.0
0
29.43
43.0
46.3
SGI-19
12:15
1.8
0.1
2
0.1
21.2
0
29.43
43.0
45.1
SGI-18
12:30
2.5
0.1
2
0.5
20.9
0
29.43
44.0
44.4
SGI-15
13:00
0.0
11.8
236
6.8
13.3
0
29.43
44.0
28.2
SGI-16
13:10
4.0
0.2
4
0.7
21.0
0
29.43
44.0
25.6
SGI-17
13:20
3.7
0.1
2
0.4
20.7
0
29.36
44.0
20
SGI-1
16:30
7.7
0.2
4
4.3
10.6
0
29.30
47.0
45.1
SGI-13
13:50
0.1
65.6
1312
24.1
0.5
1
29.38
45.0
35.4
SGI-8
14:15
0.0
44.2
884
19.4
2.0
4
29.38
45.0
20
SGI-11
14:30
19.0
13.8
276
16.4
0.1
1
29.37
45.0
20
SGI-12
14:45
8.0
3.3
66
11.5
2.6
0
29.37
45.0
20
SGI-9
15:00
10.5
1.4
28
10.4
3.9
0
29.37
47.0
35.4
SGI-7
15:15
5.4
18.3
366
15.1
0.3
2
29.38
47.0
20
SGI-10
15:30
13.2
0.1
2
17.0
1.3
0
29.38
47.0
20
SGI-4
15:45
11.4
0.3
6
3.5
16.5
0
29.38
47.0
20
SGI-3
15:55
3.6
14.7
294
17.9
0.3
0
29.40
47.0
33.4
SGI-6
16:00
1.3
33.8
676
20.6
0.2
13
29.37
47.0
36.6
SGI-2
16:10
1.1
9.6
192
16.5
3.2
1
29.37
47.0
38.9
SGI-5
16:15
10.4
14.0
280
20.4
1.5
0
29.30
47.0
45.1
Name Signature Date Notes:
(1) LB Slagle 12/13/2022
SGI-14 was wet after purging air for a few minutes with the PID. S&ME could not assess landfill vapors at this
point.

SOIL VAPOR FIELD SAMPLING FORM A = L
Pro ect Name: McGuire Nuclear Station - Landfill No. 1
j 111
Project Number: 22350048A
Location: 13339 Hagers Ferry Road, Huntersville, NC Date: 12/14/2022
Weather: Overcast
Air Temp (°F):
40s
Helium Detector Serial No.: 42134
Calibration Date:
12/12/2022
Sample Information
Sample Type
Soil Gas Implant
Soil Gas Implant
Soil Gas Implant
Soil Gas Implant
Soil Gas Implant
Sample ID
SG 1-6
SG 1-8
SGI-13
SG 1-7
SGI-21
Canister ID
18321
36448
3465
36967
38755
Regulator ID
3472
10532
2708
17205
17206
Canister Volume (L)
6
6
6
6
6
Ambient Temp (7)
44
44
44
44
42
Barometric Pressure (inHg)
29.8
29.8
29.8
29.8
29.8
Leak Test Information
Purge Method
He Concentration in Shroud (%)
He Detected in Leak Test (Y or N)
He Conc. Detected in Leak Test (ppm)
Percent of He in the Leak Test versus the
Shroud
Leak Test Passed (Yes/No)'
Purge Information
Enter
Construction Details
0.17" ID
Total Tubing
(ft)
0.25" ID
Total Tubing
(in)
Sand Pack
Interval
(in)
0.17" ID
Total Tubing
A
0.25" ID
Total Tubing
(in)
Sand Pack
Interval
(in)
0.17" ID
Total Tubing
(ft)
0.25" ID
Total Tubing
(in)
Sand Pack
Interval
(in)
0.17" ID
Total Tubing
A
0.25" ID
Total Tubing
(in)
Sand Pack
Interval
(in)
0.17" ID
Total Tubing
(ft)
0.25" ID
Total Tubing
(in)
Sand Pack
Interval
(in)
0
Sand Pack Interval Depth (in-bgs)
to
to
to
to
to
Volume (mL)
Purge Flow Rate (mL/min)
Purge Interval (3x Vol.) (min)
Actual Purge Time (min)
Sample Collection
Start Time
11:52
12:20
11:40
12:00
10:30
Initial Vacuum (inHg)
23
29
25
25
28
End Time
12:36
13:16
12:23
12:45
11:18
Final Vacuum (inHg)
3
7
5
3
5
Approximate Total Time (min)
44
56
43
45
48
Sample Analysis
Sampler Information
Sampled by: Sampler Signature: Date:
Notes: 1. Per the NCDEQ DWM VI Guidance dated March 2018, the helium concentration detected during the leak test shall not exceed 10% of the helium concentration in the shroud.
Revision Date: 5/3/18 11:30

Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
March 29, 2023

Landfill Gas Sampling Report (Permit No. 6004-INDUS-1981)
Duke Energy - McGuire Nuclear Station - Landfill No. 1
Huntersville, Mecklenburg County, North Carolina
S&ME Project No. 22350048
March 29, 2023

Appendix V - Laboratory Reports and Chains of Custody

yENTHALPY
! ANALYTICAL
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616 Project Number: 22350048A
Submitted To: Sam Watts Purchase Order:
Client Site I.D.: McGuire Nuclear Station Landfill No.1
Enclosed are the results of analyses for samples received by the laboratory on 12/15/2022 09:43. If
you have any questions concerning this report, please feel free to contact the laboratory.
Sincerely,
Ted Soyars
Technical Director
End Notes:
The test results listed in this report relate only to the samples submitted to the laboratory and as received by the
Laboratory.
Unless otherwise noted, the test results for solid materials are calculated on a wet weight basis. Analyses for pH,
dissolved oxygen, temperature, residual chlorine and sulfite that are performed in the laboratory do not meet NELAC
requirements due to extremely short holding times. These analyses should be performed in the field. The results of field
analyses performed by the Sampler included in the Certificate of Analysis are done so at the client's request and are not
included in the laboratory's fields of certification nor have they been audited for adherence to a reference method or
procedure.
The signature on the final report certifies that these results conform to all applicable NELAC standards unless otherwise
specified. For a complete list of the Laboratory's NELAC certified parameters please contact customer service.
This report shall not be reproduced except in full without the expressed and written approval of an authorized
representative of Enthalpy Analytical, Inc.
�e p.0 Fp
2�
'qB
TNI Accredited
VELAP ID 460021
Page 1 of 17

ENTHAtPY
� ! ANALYTICAL
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh
3201 Spring Forest Road
Raleigh, NC 27616
Submitted To: Sam Watts
Client Site I.D.: McGuire Nuclear Station Landfill No.1
Date Received: December 15, 2022 9:43
Date Issued: December 21, 2022 15:14
Project Number: 22350048A
Purchase Order:
ANALYTICAL REPORT FOR SAMPLES
Sample ID
Laboratory ID
Matrix
Date Sampled
Date Received
SGI-13
22LO840-01
Air
12/14/2022 12:23
12/15/2022 09:43
SGI-6
22LO840-02
Air
12/14/2022 12:36
12/15/2022 09:43
SGI-8
22LO840-03
Air
12/14/2022 13:16
12/15/2022 09:43
SGI-7
22LO840-04
Air
12/14/2022 12:45
12/15/2022 09:43
SGI-21
22LO840-05
Air
12/14/2022 11:18
12/15/2022 09:43
Page 2 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To:
Sam Watts
Project Number:
22350048A
Client Site I.D.:
McGuire Nuclear Station Landfill No.1
Purchase Order:
ANALYTICAL RESULTS
Project Location:
Sample Description/Location:
Initial Vacuum(in Hg): 30
Field Sample #: SGI-13
Sub Description/Location:
Final Vacuum(in Hg): 4.8
Canister ID: 063-00225::3465D
Receipt Vacuum(in
Hg): 4.8
Sample ID: 22L0840-01
Canister Size: 6L
Flow Controller Type:
PASSIVE
Sample Matrix: Air
Flow Controller ID:
063-00401::02708
Sampled: 12/14/2022 12:23
Sample Type: LF
Sulfur Volatile Organic Compounds by GCMS
EPA TO-15
ppbv
ug/M'
Date/Time
Analyte
Results
MDL LOQ Flag/Qual
Results MDL LOQ
Dilution PF
Analyzed
Analyst
Carbon Disulfide, as received
ND
450 450
ND 1400 1400
45 1
12/20/22 9:57
KCS
Hydrogen Sulfide, as received
884
450 450
1200 630 630
45 1
12/20/22 9:57
KCS
1-Propanethiol, as received
ND
450 450
ND 1400 1400
45 1
12/20/22 9:57
KCS
2-Propanethiol, as received
ND
450 450
ND 1400 1400
45 1
12/20/22 9:57
KCS
Carbonyl sulfide, as received
ND
450 450
ND 1100 1100
45 1
12/20/22 9:57
KCS
Dimethyl sulfide, as received
ND
450 450
ND 1100 1100
45 1
12/20/22 9:57
KCS
Ethyl mercaptan, as received
ND
450 450
ND 1100 1100
45 1
12/20/22 9:57
KCS
Methyl mercaptan, as received
ND
450 450
ND 890 890
45 1
12/20/22 9:57
KCS
Total Reduced Sulfurs, as received
884
450 450
1200 630 630
45 1
12/20/22 9:57
KCS
Surrogate(s)
% Recovery
% Recovery Limits
1,4-Difluorobenzene (Surr), as
96.8
80-120
12/20/22 9:57
received
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis
Vol% EPA 3C
Date/Time
Analyte
Result
MDL LOQ Flag/Qual
Dilution PF
Analyzed
Analyst
Methane, as received
50.5
0.45 0.45
9 1
12/16/22 12:04
DFH
Carbon dioxide, as received
19.9
0.45 0.45
9 1
12/16/22 12:04
DFH
Oxygen (02), as received
3.67
0.45 0.45
9 1
12/16/22 12:04
DFH
Hydrogen (1-12), as received
ND
0.18 0.18
9 1
12/16/22 12:04
DFH
Nitrogen (N2), as received
21.0
9.00 9.00
9 1
12/16/22 12:04
DFH
Carbon Monoxide, as received
ND
0.009 0.009
9 1
12/16/22 12:04
DFH
Page 3 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To:
Sam Watts
Project Number:
22350048A
Client Site I.D.:
McGuire Nuclear Station Landfill No.1
Purchase Order:
ANALYTICAL RESULTS
Project Location:
Sample Description/Location:
Initial Vacuum(in Hg): 30
Field Sample #: SGI-6
Sub Description/Location:
Final Vacuum(in Hg): 1.2
Canister ID: 063-00171::18321D
Receipt Vacuum(in
Hg): 1.2
Sample ID: 22L0840-02
Canister Size: 6L
Flow Controller Type:
PASSIVE
Sample Matrix: Air
Flow Controller ID:
063-00482::3472
Sampled: 12/14/2022 12:36
Sample Type: LF
Sulfur Volatile Organic Compounds by GCMS
EPA TO-15
ppbv
ug/M'
Date/Time
Analyte
Results
MDL LOQ Flag/Qual
Results MDL LOQ
Dilution PF
Analyzed
Analyst
Carbon Disulfide, as received
ND
270 270
ND 840 840
27 1
12/20/22 11:15
KCS
Hydrogen Sulfide, as received
732
270 270
1000 380 380
27 1
12/20/22 11:15
KCS
1-Propanethiol, as received
ND
270 270
ND 840 840
27 1
12/20/22 11:15
KCS
2-Propanethiol, as received
ND
270 270
ND 840 840
27 1
12/20/22 11:15
KCS
Carbonyl sulfide, as received
ND
270 270
ND 660 660
27 1
12/20/22 11:15
KCS
Dimethyl sulfide, as received
ND
270 270
ND 690 690
27 1
12/20/22 11:15
KCS
Ethyl mercaptan, as received
ND
270 270
ND 690 690
27 1
12/20/22 11:15
KCS
Methyl mercaptan, as received
ND
270 270
ND 530 530
27 1
12/20/22 11:15
KCS
Total Reduced Sulfurs, as received
732
270 270
1000 380 380
27 1
12/20/22 11:15
KCS
Surrogate(s)
% Recovery
% Recovery Limits
1,4-Difluorobenzene (Surr), as
96.6
80-120
12/20/22 11:15
received
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis
Vol% EPA 3C
Date/Time
Analyte
Result
MDL LOQ Flag/Qual
Dilution PF
Analyzed
Analyst
Methane, as received
21.6
0.45 0.45
9 1
12/16/22 12:40
DFH
Carbon dioxide, as received
13.5
0.45 0.45
9 1
12/16/22 12:40
DFH
Oxygen (02), as received
7.39
0.45 0.45
9 1
12/16/22 12:40
DFH
Hydrogen (1-12), as received
ND
0.18 0.18
9 1
12/16/22 12:40
DFH
Nitrogen (N2), as received
54.0
13.5 13.5
13.5 1
12/16/22 16:04
DFH
Carbon Monoxide, as received
ND
0.009 0.009
9 1
12/16/22 12:40
DFH
Page 4 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To:
Sam Watts
Project Number:
22350048A
Client Site I.D.:
McGuire Nuclear Station Landfill No.1
Purchase Order:
ANALYTICAL RESULTS
Project Location:
Sample Description/Location:
Initial Vacuum(in Hg): 30
Field Sample #: SGI-8
Sub Description/Location:
Final Vacuum(in Hg): 7.0
Canister ID: 063-00233::36448D
Receipt Vacuum(in
Hg): 7.0
Sample ID: 22L0840-03
Canister Size: 6L
Flow Controller Type:
PASSIVE
Sample Matrix: Air
Flow Controller ID:
063-00452::10532
Sampled: 12/14/2022 13:16
Sample Type: LF
Sulfur Volatile Organic Compounds by GCMS
EPA TO-15
ppbv
ug/M'
Date/Time
Analyte
Results
MDL LOQ Flag/Qual
Results MDL LOQ
Dilution PF
Analyzed
Analyst
Carbon Disulfide, as received
ND
360 360
ND 1100 1100
36 1
12/20/22 13:51
KCS
Hydrogen Sulfide, as received
ND
360 360
ND 500 500
36 1
12/20/22 13:51
KCS
1-Propanethiol, as received
ND
360 360
ND 1100 1100
36 1
12/20/22 13:51
KCS
2-Propanethiol, as received
ND
360 360
ND 1100 1100
36 1
12/20/22 13:51
KCS
Carbonyl sulfide, as received
ND
360 360
ND 880 880
36 1
12/20/22 13:51
KCS
Dimethyl sulfide, as received
ND
360 360
ND 910 910
36 1
12/20/22 13:51
KCS
Ethyl mercaptan, as received
ND
360 360
ND 910 910
36 1
12/20/22 13:51
KCS
Methyl mercaptan, as received
ND
360 360
ND 710 710
36 1
12/20/22 13:51
KCS
Total Reduced Sulfurs, as received
ND
360 360
ND 500 500
36 1
12/20/22 13:51
KCS
Surrogate(s)
% Recovery
% Recovery Limits
1,4-Difluorobenzene (Surr), as
96.9
80-120
12/20/22 13:51
received
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis
Vol% EPA 3C
Date/Time
Analyte
Result
MDL LOQ Flag/Qual
Dilution PF
Analyzed
Analyst
Methane, as received
2.43
0.45 0.45
9 1
12/16/22 14:06
DFH
Carbon dioxide, as received
10.4
0.45 0.45
9 1
12/16/22 14:06
DFH
Oxygen (02), as received
6.97
0.45 0.45
9 1
12/16/22 14:06
DFH
Hydrogen (1-12), as received
ND
0.18 0.18
9 1
12/16/22 14:06
DFH
Nitrogen (N2), as received
77.5
18.0 18.0
18 1
12/19/22 10:20
DFH
Carbon Monoxide, as received
ND
0.009 0.009
9 1
12/16/22 14:06
DFH
Page 5 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To:
Sam Watts
Project Number:
22350048A
Client Site I.D.:
McGuire Nuclear Station Landfill No.1
Purchase Order:
ANALYTICAL RESULTS
Project Location:
Sample Description/Location:
Initial Vacuum(in Hg): 30
Field Sample #: SGI-7
Sub Description/Location:
Final Vacuum(in Hg): 3.4
Canister ID: 063-00173::36967D
Receipt Vacuum(in
Hg): 3.4
Sample ID: 22L0840-04
Canister Size: 6L
Flow Controller Type:
PASSIVE
Sample Matrix: Air
Flow Controller ID:
063-00483::17205
Sampled: 12/14/2022 12:45
Sample Type: LF
Sulfur Volatile Organic Compounds by GCMS
EPA TO-15
ppbv
ug/M'
Date/Time
Analyte
Results
MDL LOQ Flag/Qual
Results MDL LOQ
Dilution PF
Analyzed
Analyst
Carbon Disulfide, as received
ND
360 360
ND 1100 1100
36 1
12/20/22 14:30
KCS
Hydrogen Sulfide, as received
ND
360 360
ND 500 500
36 1
12/20/22 14:30
KCS
1-Propanethiol, as received
ND
360 360
ND 1100 1100
36 1
12/20/22 14:30
KCS
2-Propanethiol, as received
ND
360 360
ND 1100 1100
36 1
12/20/22 14:30
KCS
Carbonyl sulfide, as received
ND
360 360
ND 880 880
36 1
12/20/22 14:30
KCS
Dimethyl sulfide, as received
ND
360 360
ND 910 910
36 1
12/20/22 14:30
KCS
Ethyl mercaptan, as received
ND
360 360
ND 910 910
36 1
12/20/22 14:30
KCS
Methyl mercaptan, as received
ND
360 360
ND 710 710
36 1
12/20/22 14:30
KCS
Total Reduced Sulfurs, as received
ND
360 360
ND 500 500
36 1
12/20/22 14:30
KCS
Surrogate(s)
% Recovery
% Recovery Limits
1,4-Difluorobenzene (Surr), as
98.4
80-120
12/20/22 14:30
received
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis
Vol% EPA 3C
Date/Time
Analyte
Result
MDL LOQ Flag/Qual
Dilution PF
Analyzed
Analyst
Methane, as received
11.9
0.45 0.45
9 1
12/16/22 15:11
DFH
Carbon dioxide, as received
9.97
0.45 0.45
9 1
12/16/22 15:11
DFH
Oxygen (02), as received
5.57
0.45 0.45
9 1
12/16/22 15:11
DFH
Hydrogen (1-12), as received
ND
0.18 0.18
9 1
12/16/22 15:11
DFH
Nitrogen (N2), as received
67.9
18.0 18.0
18 1
12/19/22 10:54
DFH
Carbon Monoxide, as received
ND
0.009 0.009
9 1
12/16/22 15:11
DFH
Page 6 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To:
Sam Watts
Project Number:
22350048A
Client Site I.D.:
McGuire Nuclear Station Landfill No.1
Purchase Order:
ANALYTICAL RESULTS
Project Location:
Sample Description/Location:
Initial Vacuum(in Hg): 30
Field Sample #: SGI-21
Sub Description/Location:
Final Vacuum(in Hg): 4.4
Canister ID: 063-00144::38755D
Receipt Vacuum(in
Hg): 4.4
Sample ID: 22L0840-05
Canister Size: 6L
Flow Controller Type:
PASSIVE
Sample Matrix: Air
Flow Controller ID:
063-00481::17206
Sampled: 12/14/2022 11:18
Sample Type: LF
Sulfur Volatile Organic Compounds by GCMS
EPA TO-15
ppbv
ug/M'
Date/Time
Analyte
Results
MDL LOQ Flag/Qual
Results MDL LOQ
Dilution PF
Analyzed
Analyst
Carbon Disulfide, as received
ND
450 450
ND 1400 1400
45 1
12/20/22 15:09
KCS
Hydrogen Sulfide, as received
ND
450 450
ND 630 630
45 1
12/20/22 15:09
KCS
1-Propanethiol, as received
ND
450 450
ND 1400 1400
45 1
12/20/22 15:09
KCS
2-Propanethiol, as received
ND
450 450
ND 1400 1400
45 1
12/20/22 15:09
KCS
Carbonyl sulfide, as received
ND
450 450
ND 1100 1100
45 1
12/20/22 15:09
KCS
Dimethyl sulfide, as received
ND
450 450
ND 1100 1100
45 1
12/20/22 15:09
KCS
Ethyl mercaptan, as received
ND
450 450
ND 1100 1100
45 1
12/20/22 15:09
KCS
Methyl mercaptan, as received
ND
450 450
ND 890 890
45 1
12/20/22 15:09
KCS
Total Reduced Sulfurs, as received
ND
450 450
ND 630 630
45 1
12/20/22 15:09
KCS
Surrogate(s)
% Recovery
% Recovery Limits
1,4-Difluorobenzene (Surr), as
101
80-120
12/20/22 15:09
received
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis
Vol% EPA 3C
Date/Time
Analyte
Result
MDL LOQ Flag/Qual
Dilution PF
Analyzed
Analyst
Methane, as received
58.2
0.45 0.45
9 1
12/19/22 9:05
DFH
Carbon dioxide, as received
7.88
0.45 0.45
9 1
12/19/22 9:05
DFH
Oxygen (02), as received
4.82
0.45 0.45
9 1
12/19/22 9:05
DFH
Hydrogen (1-12), as received
ND
0.18 0.18
9 1
12/19/22 9:05
DFH
Nitrogen (N2), as received
23.4
9.00 9.00
9 1
12/19/22 9:05
DFH
Carbon Monoxide, as received
ND
0.009 0.009
9 1
12/19/22 9:05
DFH
Page 7 of 17

ENTHALPY
A _tYTICAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts
Client Site I.D.: McGuire Nuclear Station Landfill No.1
Analytical Summary
Preparation Factors
Sample ID Initial / Final Method
Project Number:
Purchase Order:
Batch ID Sequence ID
22350048A
Calibration ID
Sulfur Volatile Organic
Compounds by GCMS
Preparation Method:
No Prep VOC Air
22LO840-01
100 mL/ 100 mL
EPATO-15
BFL0759
SFL0768
AL20067
22LO840-02
100 mL/ 100 mL
EPATO-15
BFL0759
SFL0768
AL20067
22LO840-03
100 mL/ 100 mL
EPATO-15
BFL0759
SFL0768
AL20067
22LO840-04
100 mL/ 100 mL
EPATO-15
BFL0759
SFL0768
AL20067
22LO840-05
100 mL/ 100 mL
EPATO-15
BFL0759
SFL0768
AL20067
Preparation Factors
Sample ID
Initial / Final
Method
Batch ID
Sequence ID
Calibration ID
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis
22LO840-01
1.00 mL / 1.00 mL
EPA 3C
22LO840-01 RE
1.00 mL / 1.00 mL
EPA 3C
22LO840-02
1.00 mL / 1.00 mL
EPA 3C
221-0840-02RE1
1.00 mL / 1.00 mL
EPA 3C
22LO840-03
1.00 mL / 1.00 mL
EPA 3C
22L0840-03RE1
1.00 mL / 1.00 mL
EPA 3C
22LO840-04
1.00 mL / 1.00 mL
EPA 3C
221-0840-04RE1
1.00 mL / 1.00 mL
EPA 3C
22LO840-05
1.00 mL / 1.00 mL
EPA 3C
Preparation Method:
No Prep VOC GC Air
BFL0532
SFL0597
AG00026
BFL0532
SFL0597
AG00026
BFL0532
SFL0597
AG00026
BFL0532
SFL0597
AG00026
BFL0532
SFL0597
AG00026
BFL0532
SFL0656
AG00026
BFL0532
SFL0597
AG00026
BFL0532
SFL0656
AG00026
BFL0532
SFL0656
AG00026
Page 8 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts Project Number: 22350048A
Client Site I.D.: McGuire Nuclear Station Landfill No.1 Purchase Order:
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis - Quality Control
Enthalpy Analytical
Reporting Spike Source %REC RPD
Analyte Result Limit Units Level Result %REC Limits RPD Limit Qual
Batch BFL0532 - No Prep VOC GC Air
Blank (BFL0532-BLK1)
Prepared & Analyzed: 12/14/2022
Methane
<
0.05
Vol%
Carbon dioxide
<
0.05
Vol%
Oxygen (02)
<
0.05
Vol%
Nitrogen (N2)
<
1.00
Vol%
Hydrogen (H2)
<
0.02
Vol%
Carbon Monoxide
<
0.001
Vol%
LCS (BFL0532-BS1)
Prepared &Analyzed: 12/14/2022
Methane
4120
0.05
ppmv
5000
82.4 70-130
Carbon dioxide
4280
0.05
ppmv
5000
85.6 70-130
Oxygen (02)
5150
0.05
ppmv
5000
103 70-130
Hydrogen (H2)
5920
0.02
ppmv
5100
116 70-130
Nitrogen (N2)
5510
1
ppmv
5000
110 70-130
Carbon Monoxide
4950
0.001
ppmv
5000
99.0 70-130
Duplicate (BFL0532-DUP1)
Source: 22LO475-02
Prepared &Analyzed: 12/14/2022
Methane
<
0.15
Vol%
<0.15 NA
5
Carbon dioxide
<
0.15
Vol%
<0.15 NA
5
Oxygen (02)
22.1
0.15
Vol%
22.0 0.493
5
Nitrogen (N2)
74.9
3.00
Vol%
74.9 0.0113
5
Hydrogen (H2)
<
0.06
Vol%
<0.06 NA
5
Carbon Monoxide
<
0.003
Vol%
0.02 NA
5
Duplicate (BFL0532-DUP2)
Source: 22LO475-03
Prepared & Analyzed: 12/14/2022
Methane
<
0.15
Vol%
<0.15 NA
5
Carbon dioxide
<
0.15
Vol%
<0.15 NA
5
Oxygen (02)
21.6
0.15
Vol%
21.3 1.46
5
Nitrogen (N2)
73.3
3.00
Vol%
72.5 1.05
5
Hydrogen (H2)
<
0.06
Vol%
<0.06 NA
5
Carbon Monoxide
<
0.003
Vol%
<0.003 NA
5
Page 9 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts Project Number: 22350048A
Client Site I.D.: McGuire Nuclear Station Landfill No.1 Purchase Order:
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis - Quality Control
Enthalpy Analytical
Reporting Spike Source %REC RPD
Analyte Result Limit Units Level Result %REC Limits RPD Limit Qual
Batch BFL0532 - No Pren VOC GC Air
Duplicate (BFL0532-DUP3)
Source: 22LO475-04
Prepared & Analyzed: 12/14/2022
Methane
<
0.15
Vol%
<0.15 NA
5
Carbon dioxide
<
0.15
Vol%
<0.15 NA
5
Oxygen (02)
22.3
0.15
Vol%
21.9 1.74
5
Hydrogen (H2)
<
0.06
Vol%
<0.06 NA
5
Nitrogen (N2)
75.5
3.00
Vol%
74.0 1.91
5
Carbon Monoxide
<
0.003
Vol%
<0.003 NA
5
Duplicate (BFL0532-DUP4)
Source: 22LO475-05
Prepared &Analyzed: 12/14/2022
Methane
<
0.15
Vol%
<0.15 NA
5
Carbon dioxide
<
0.15
Vol%
<0.15 NA
5
Oxygen (02)
21.6
0.15
Vol%
21.1 2.37
5
Nitrogen (N2)
74.1
3.00
Vol%
72.7 1.90
5
Hydrogen (H2)
<
0.06
Vol%
<0.06 NA
5
Carbon Monoxide
<
0.003
Vol%
<0.003 NA
5
Duplicate (BFL0532-DUP5)
Source: 22LO475-06
Prepared & Analyzed: 12/14/2022
Methane
<
0.15
Vol%
<0.15 NA
5
Carbon dioxide
<
0.15
Vol%
<0.15 NA
5
Oxygen (02)
22.0
0.15
Vol%
21.4 2.74
5
Hydrogen (H2)
<
0.06
Vol%
<0.06 NA
5
Nitrogen (N2)
74.8
3.00
Vol%
73.0 2.44
5
Carbon Monoxide
<
0.003
Vol%
<0.003 NA
5
Duplicate (BFL0532-DUP6)
Source: 22LO475-07
Prepared & Analyzed: 12/14/2022
Methane
<
0.15
Vol%
<0.15 NA
5
Carbon dioxide
<
0.15
Vol%
<0.15 NA
5
Oxygen (02)
21.8
0.15
Vol%
21.4 1.68
5
Nitrogen (N2)
73.8
3.00
Vol%
72.9 1.19
5
Hydrogen (H2)
<
0.06
Vol%
<0.06 NA
5
Carbon Monoxide
<
0.003
Vol%
<0.003 NA
5
Page 10 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts Project Number: 22350048A
Client Site I.D.: McGuire Nuclear Station Landfill No.1 Purchase Order:
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis - Quality Control
Enthalpy Analytical
Reporting Spike Source %REC RPD
Analyte Result Limit Units Level Result %REC Limits RPD Limit Qual
Batch BFL0532 - No Pren VOC GC Air
Duplicate (BFL0532-DUP8)
Source: 22LO840-01RE1
Prepared &Analyzed: 12/16/2022
Methane
50.3
0.45
Vol%
50.5 0.471
5
Carbon dioxide
19.8
0.45
Vol%
19.9 0.745
5
Oxygen (02)
3.77
0.45
Vol%
3.67 2.72
5
Hydrogen (H2)
<
0.18
Vol%
<0.18 NA
5
Nitrogen (N2)
21.3
9.00
Vol%
21.0 1.41
5
Carbon Monoxide
<
0.009
Vol%
<0.009 NA
5
Duplicate (BFL0532-DUP9)
Methane
Carbon dioxide
Oxygen (02)
Hydrogen (H2)
Carbon Monoxide
Source: 22LO840-02
21.8
0.45
Vol%
13.7
0.45
Vol%
6.78
0.45
Vol%
<
0.18
Vol%
<
0.009
Vol%
Prepared & Analyzed: 12/16/2022
21.6
0.941 5
13.5
1.47 5
7.39
8.67 5
<0.18
NA 5
<0.009
NA 5
P
Duplicate (BFL0532-DUPA)
Source: 22LO840-03
Prepared & Analyzed: 12/16/2022
Methane
2.42
0.45
Vol%
2.43 0.466
5
Carbon dioxide
10.2
0.45
Vol%
10.4 1.81
5
Oxygen (02)
6.94
0.45
Vol%
6.97 0.394
5
Hydrogen (H2)
<
0.18
Vol%
<0.18 NA
5
Carbon Monoxide
<
0.009
Vol%
<0.009 NA
5
Duplicate (BFL0532-DUPB)
Source: 22LO840-04
Prepared & Analyzed: 12/16/2022
Methane
11.8
0.45
Vol%
11.9 0.691
5
Carbon dioxide
10.0
0.45
Vol%
9.97 0.411
5
Oxygen (02)
5.69
0.45
Vol%
5.57 2.24
5
Hydrogen (H2)
<
0.18
Vol%
<0.18 NA
5
Carbon Monoxide
<
0.009
Vol%
<0.009 NA
5
Page 11 of 17

YENTHALPY
! A NAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts Project Number: 22350048A
Client Site I.D.: McGuire Nuclear Station Landfill No.1 Purchase Order:
Volatile Organic Compounds by GC/TCD - Unadjusted, as received basis - Quality Control
Enthalpy Analytical
Reporting Spike Source %REC RPD
Analyte Result Limit Units Level Result %REC Limits RPD Limit Qual
Batch BFL0532 - No Pren VOC GC Air
Duplicate (BFL0532-DUPD)
Source: 22LO840-05
Prepared & Analyzed: 12/19/2022
Methane
58.2
0.45
Vol%
58.2 0.0663
5
Carbon dioxide
7.85
0.45
Vol%
7.88 0.365
5
Oxygen (02)
4.95
0.45
Vol%
4.82 2.60
5
Nitrogen (N2)
23.9
9.00
Vol%
23.4 2.03
5
Hydrogen (H2)
<
0.18
Vol%
<0.18 NA
5
Carbon Monoxide
<
0.009
Vol%
<0.009 NA
5
Duplicate (BFL0532-DUPE)
Methane
Carbon dioxide
Oxygen (02)
Nitrogen (N2)
Carbon Monoxide
Source: 22LO933-02
8.59
0.45
Vol%
57.7
0.45
Vol%
2.34
0.45
Vol%
<
9.00
Vol%
0.11
0.009
Vol%
Prepared & Analyzed: 12/19/2022
8.59
0.00461 5
57.4
0.542 5
2.34
0.0169 5
<9.00
NA 5
0.11
4.76 5
Page 12 of 17

YENTHALPY
! A NAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts Project Number: 22350048A
Client Site I.D.: McGuire Nuclear Station Landfill No.1 Purchase Order:
Sulfur Volatile Organic Compounds by GCMS - Quality Control
Enthalpy Analytical
Reporting Spike Source %REC RPD
Analyte Result Limit Units Level Result %REC Limits RPD Limit Qual
Batch BFL0759 - No Prep VOC Air
Blank (BFL0759-BLK1)
Prepared &Analyzed: 12/19/2022
Carbon Disulfide
<
10.0
ppbv
Hydrogen Sulfide
<
10.0
ppbv
1-Propanethiol
<
10.0
ppbv
2-Propanethiol
<
10.0
ppbv
Carbonyl sulfide
<
10.0
ppbv
Dimethyl sulfide
<
10.0
ppbv
Ethyl mercaptan
<
10.0
ppbv
Methyl mercaptan
<
10.0
ppbv
Total Reduced Sulfurs
<
10.0
ppbv
Surr.1,4-Difluorobenzene
19.5
ppbv 20.0 97.4 80-120
(Surr)
LCS (BFL0759-BS1)
Prepared &Analyzed: 12/19/2022
Carbon Disulfide
23.5
10
ppbv
22.4
105 70-130
Hydrogen Sulfide
25.3
10
ppbv
22.2
114 70-130
1-Propanethiol
26.7
10
ppbv
15.7
170 70-130 L
2-Propanethiol
24.9
10
ppbv
15.3
163 70-130 L
Carbonyl sulfide
20.2
10
ppbv
22.8
88.6 70-130
Dimethyl sulfide
22.4
10
ppbv
20.0
112 70-130
Ethyl mercaptan
30.4
10
ppbv
15.9
191 70-130 L
Methyl mercaptan
22.5
10
ppbv
15.1
149 70-130 L
Surr. 1,4-Difluorobenzene 20.0 ppbv 20.0 100 70-130
(Surr)
Page 13 of 17

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts
Client Site I.D.: McGuire Nuclear Station Landfill No.1
Certified Analytes included in this Report
Analyte Certifications Analyte
EPA 3C in Air
Methane
VELAP
Oxygen (02)
VELAP
Nitrogen (N2)
VELAP
EPA TO-15 in Air
Carbon Disulfide
VELAP
Project Number: 22350048A
Purchase Order:
Certifications
Code
Description
Laboratory ID
Expires
MdDOE
Maryland DE Drinking Water
341
12/31/2023
NC
North Carolina DENR
495
07/31/2023
NCDEQ
North Carolina DEQ
495
07/31/2023
NCDOH
North Carolina Department of Health
51714
07/31/2023
NYDOH
New York DOH Drinking Water
12096
04/01/2023
PADEP
NELAP-Pennsylvania Certificate #008
68-03503
10/31/2023
VELAP
NELAP-Virginia Certificate #12157
460021
06/14/2023
WVDEP
West Virginia DEP
350
11/30/2023
Qualifiers and Definitions
L LCS recovery is outside of established acceptance limits
P Duplicate analysis does not meet the acceptance criteria for precision
RPD Relative Percent Difference
Qual Qualifers
-RE Denotes sample was re -analyzed
PF Preparation Factor
MDL Method Detection Limit
LOQ Limit of Quantitation
ppbv parts per billion by volume
TIC Tentatively Identified Compounds are compounds that are identified by comparing the analyte mass spectral pattern with the
NIST spectral library. A TIC spectral match is reported when the pattern is at least 75% consistent with the published pattern.
Compound concentrations are estimated and are calculated using an internal standard response factor of 1.
All EPA method 3C results are reported as normalized values when the sum total of all evaluated constituents is outside ± 10%
of the absolute.
Page 14 of 17

Y)joENTHALPY
! ANALYTICAL
AIR ANALYSIS
CHAIN OF CUSTODY Eauiament Must be Returned Bv: 1/6123
COMPANY NAME:
S&ME
INVOICE TO: Same
PROJECT NAME/Quote #:
CONTACT: Sam Watts
INVOICE CONTACT:
SITE NAME:
ADDRESS: 3201 Spring Forest Rd, Raleigh NC
INVOICE ADDRESS:
PROJECT NUMBER:
PHONE #:
INVOICE PHONE #:
P.O. #:
FAX #:
EMAIL:
Pretreatment Program:
Is sample for compliance reporting? YES NO
Regulatory State:
Is sample from a chlorinated supply? YES NO TPWS
I.D. #:
SAMPLER NAME (PRINT): I S (ac,(„
SAMPLER SIGNATURE:
Tutn Around Time: i e: 10 Days
or _ Day
Lj
MalrixCodes: AA=Indoor/Ambient Air SG=Soil Gas LV=LandfllWenlGas oT=Other
221L-063-0001 WO:
Regulator
Info
Canister Information
Sampling Start Information
Sampling Stop Information
m
ANALYSI;
LAB
LAB
Barometric Pros. (in Hg):
Barometric Pres. (in Hg):
CLIENT
m
Initial
Final
SAMPLE I.D.
Flow
Outgoing
Receiving
?
V
Controller
Cal
FlowUm
N
cleaning
Canister
Vacuum (in
Canister
Vacuum (in
Start Time
Canister
Vacuum (in
s tarti�
ample
Stop Time
Canister
Vacuum (In
Ending
Semple
X
fa
Q
w
ID
(mn
Canister ID
Batch ID
Hg)
Hg)
Start Date
(24hr dodo
Hg)
Temp -F
Stop Date
(24hr dodo
Hg)
Temp -F
f1
W
3
e)
1)
�?j
2708
1 Hr
3465
6
221130-01
3D
���i4�
2Y
Y�
AR8,
1�14�2/-Iho
LF
x
x
1
2)
-1� —
3472
1 Hr
18321
6
221130-01
30
j , ^7i
(�
Z
zlAo
6
LF
x
x
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�-� l 6
10532
1 Hr
36448
s
221130-01
30
1.0
,{ �,
Llx
x
4)
�_
17205
1 Hr
36967
6
22113"ll
30
3•q
aql 15
&
LF
x
x
20. 3°� 3td d ; ec f7 0
�REI-INQUISHE
DATE / TIME
RECEIVED:
RECEIVED: f DATE J TIME
' Level1
QC Data Package LAB USE ONLY
! ��AJ
oe /i
❑
INQUISHED:
DATE ! TIME
RECEIVED: DATE J TIME
Level 11 ❑
1 5 2z
t
S&ME - NC 22LO840
INQUISHED:
DATE / TIME
RECEIVED: DATE J TIME
Level111 ❑ j
McGuire Nuclear Station Landfill r
0
v
Level IV ❑
Recd:12/15/2022 Due:12/30/2022
v130325002
�vmrz

'o ENTHALPY
►.t ! ANALYTICAL
AIR ANALYSIS
CHAIN OF CUSTODY Equipment Must be Returned By: 116/23
COMPANY NAME: S&ME
INVOICE TO: Same
PROJECT NAME/Quote #:
CONTACT: Sam Watts
INVOICE CONTACT:
SITE NAME: dl
ADDRESS: 3201 Spring Forest Rd, Raleigh NC
INVOICE ADDRESS:
PROJECT NUMBER: 2
PHONE #:
INVOICE PHONE #:
P.O. #:
FAX
JEMAILSW
Pretreatment Program:
Is sample for compliance reporting? YES NO
lRegulatory State:
Is sample from a chlorinated supply? YES NO
JPWS I.D. #:
SAMPLER NAME (PRINT): 5 SAMPLER SIGNATURE:
Turn Around Time: rcle: 10 5 Days or _ Day
Matrix Codes: AA=indoortAmbient Air SG=Soli Gas LV=L.andfllilVent Gas oT=other 22L-063-0001 WO:
Regulator
Info
Canister Information
Sampling Start Information
Sampling Stop Information
4
ANALYSI:
CLIENT
m
LAB
!AB
Barometric Pros. (in Hg):
Barometric Pres. (in Hg):
Initial
Final
SAMPLE I.D.
Flow
Outgoing
Receiving
~
Cal
Flow
y
cleaning
Canister
Vacuum (in
Canister
Vacuum (in
StartTime
Canister
Vacuum (in
sample
Stop Time
Canister
Vacuum pn
EnMController
sample
X
m
a
ID
(mumin)
Canister ID
fA
Batch ID
Hg)
Hg)
Start Date
(24hrclock)
Hg)
Temp'F
Stop Date
(24hrclock)
Hg)
Temp-F
LU
W
1)
^.s,, I
..1�
17206
1 Hr
38755
6
221130-01
30
� � �
(u+� y+
(rl.
w3c)
`.''j
� $
4"
w o
I
l
�
Za
LF
X
X
2)
3)
4)
RELINQUISHED: DATE I TIME RECEIVE : DATE / TIME QC Data Package 1 AB SE ONLY
11 Z2 E Level ❑
-v INQUISHED: ATE-1 TIME RECEIVE • DATE /TIME
co P I vel11 ❑ 1
`° )/ ! j S&ME - NC 22L0840
INQUISHED: DATE 1 TIME RECE E : DATE/ TIME evel III ❑ ' McGuire Nuclear Station Landfill P
� Level IV ❑ i
I Recd: 12/15/2022 Due: 12/30/2022
i v130325002

ENTHALPY
�! aNAtvTiCAI,
1941 Reymet Road • Richmond, Virginia 23237 • Tel: [phone] Fax: [phone]
Certificate of Analysis
Final Report
Laboratory Order ID 22LO840
Client Name: S&ME - Raleigh Date Received: December 15, 2022 9:43
3201 Spring Forest Road Date Issued: December 21, 2022 15:14
Raleigh, NC 27616
Submitted To: Sam Watts Project Number:
Client Site I.D.: McGuire Nuclear Station Landfill No.1 Purchase Order:
Sample Conditions Checklist
Samples Received at:
How were samples received?
Were Custody Seals used? If so, were they received intact?
Are the custody papers filled out completely and correctly?
Do all bottle labels agree with custody papers?
Is the temperature blank or representative sample within acceptable limits or received on ice, and recently taken?
Are all samples within holding time for requested laboratory tests?
Is a sufficient amount of sample provided to perform the tests included?
Are all samples in appropriate containers for the analyses requested?
Were volatile organic containers received?
Are all volatile organic and TOX containers free of headspace?
Is a trip blank provided for each VOC sample set? VOC sample sets include EPA8011, EPA504, EPA8260, EPA624,
EPA8015 GRO, EPA8021, EPA524, and RSK-175.
Are all samples received appropriately preserved? Note that metals containers do not require field preservation but lab
preservation may delay analysis.
Work Order Comments
22350048A
20.30°C
FedEx Express
No
Yes
Yes
Yes
Yes
Yes
Yes
No
NA
NA
Yes
Page 17 of 17

Appendix VI - North Carolina Solid Waste Regulations

Current Solid Waste Section Rules Pertaining to Landfill Gas Monitoring
Web link to the 15A NCAC 13B Solid Waste Mgmt Rules (Readopted effective September 16, 2021)
15A NCAC 13B
.1626 — OPERATIONAL REQUIREMENTS FOR MSWLF FACILITIES
.1626(4) Explosive gases control.
(a) Owners or operators of all MSWLF units must ensure that:
(i) The concentration of methane gas generated by the facility does not exceed 25 percent
of the lower explosive limit for methane in facility structures (excluding gas control or
recovery system components); and
(ii) The concentration of methane gas does not exceed the lower explosive limit for
methane at the facility property boundary.
(b) Owners or operators of all MSWLF units must implement a routine methane monitoring
program to ensure that the standards of (4)(a) are met. A permanent monitoring system shall be
constructed on or before October 9, 1994. A temporary monitoring system shall be used prior to
construction of the permanent system.
(i) The type and frequency of monitoring must be determined based on the following
factors:
(A) Soil conditions;
(B) The hydrogeologic conditions surrounding the facility;
(C) The hydraulic conditions surrounding the facility; and
(D) The location of facility structures and property boundaries.
(ii) The minimum frequency of monitoring shall be quarterly.
(c) If methane gas levels exceeding the limits specified in (4)(a) are detected, the owner or
operator must:
(i) Immediately take all necessary steps to ensure protection of human health and notify the
Division;
(ii) Within seven days of detection, place in the operating record the methane gas levels
detected and a description of the steps taken to protect human health; and
(iii) Within 60 days of detection, implement a remediation plan for the methane gas
releases, place a copy of the plan in the operating record, and notify the Division that the
plan has been implemented. The plan shall describe the nature and extent of the problem
and the proposed remedy.
(iv) Based on the need for an extension demonstrated by the operator, the Division may
establish alternative schedules for demonstrating compliance with (4)(c)(ii) and (iii) of this
Rule.
(d) For purposes of this Item, "lower explosive limit" means the lowest percent by volume of a
mixture of explosive gases in air that will propagate a flame at 25°C and atmospheric pressure.
1626(10) Recordkeeping requirements.
(a) The owner or operator of a MSWLF unit must record and retain at the facility, or an alternative
location near the facility approved by the Division, in an operating record the following
information as it becomes available:
(iii) Gas monitoring results and any remediation plans required by Item (4) of this Rule;
page 1 of 2

.1627 — CLOSURE AND POST CLOSURE REQUIREMENTS FOR MSWLF ACTIVITES
.1627(d) Post -Closure Criteria
(1) Following closure of each MSWLF unit, the owner or operator shall conduct post -closure care.
Post -closure care shall be conducted for 30 years, except as provided under Subparagraph (2) of
this Paragraph, and consist of at least the following:
(D)-Maintaining and operating the gas monitoring system in accordance with the
requirements of Rule .1626 of this Section.
(2) The length of the post -closure care period may be:
(A) Decreased by the Division if the owner or operator demonstrates that the reduced
period is sufficient to protect human health and the environment and this demonstration is
approved by the Division; or
(B) Increased by the Division if the Division determines that the lengthened period is
necessary to protect human health and the environment.
(3) Following completion of the post -closure care period for each MSWLF unit, the owner or
operator shall notify the Division that a certification, signed by a registered professional engineer,
verifying that post -closure care has been completed in accordance with the post -closure plan, has
been placed in the operating record.
NOTES:
Based on the referenced rules above, the following words / phrases are presently in the Solid Waste
Section rules pertaining to methane and explosive landfill gas.
Rule .0101(14) states: "Explosive gas means Methane (CH) ".
Rule .0503 (2)(a) refers to "explosive gases ".
Rule .0544(d) refers to "Gas Control Plan"
Rule .0544(d)(1) refers to "methane or other explosive gases ".
Rule .0544(d)(2) refers to "methane monitoring program"
Rule .0544(d)(3) refers to "methane or explosive gas levels"
Rule .0566 (13) refers to "explosive gases ".
Rule .1626 (4) refers to "explosive gases control "
Rule .1626(4)(a-b) refers to "methane monitoring" and "methane monitoring program "
page 2 of 2