26065_Sub-Slab Soil Gas Report_Service Distributing Co_20230504

Via Email
May 4, 2023
NCDEQ — Division of Waste Management
Brownfields Redevelopment Section
1646 Mail Service Center
Raleigh, North Carolina 27699-1646
Attn: Ms. Carolyn Minnich
Re: Sub -Slab Soil Gas Assessment Report
Former Service Distributing Co.
S. Tryon Street & Orchard Circle
Charlotte, North Carolina
Brownfields Project No. 26065-22-060
H&H Project No. BOU-024
Dear Carolyn:
1.0 Introduction
hart � hickman
SMARTER ENVIRONMENTAL SOLUTIONS
On behalf of Boulevard at LoSo Tract 2, LLC (the Prospective Developer or PD), Hart &
Hickman, PC (H&H) has prepared this report to document recent sub -slab soil gas sampling
activities completed at the Former Service Distributing Co. Brownfields property (Brownfields
Project No. 26065-22-060) located at 4200, 4208, 4214, and 4220 S. Tryon Street, 124 Orchard
Circle, and 419 W. Peterson Drive in Charlotte, Mecklenburg County, North Carolina (Site).
The Site consists of six contiguous parcels (Mecklenburg County Parcel ID Nos. 14525506,
14525510, 14525511, 14525512, 14525513, and 14525514) that collectively total approximately
3.7-acres of land. The Site is located in a rapidly densifying area of the lower South End (LoSo)
neighborhood in close proximity to the LYNX Blue Line light rail and uptown Charlotte. A Site
location map is provided as Figure 1, and the Site and surrounding area are shown in Figure 2.
The Site was most recently developed with the following: one approximately 2,000 square foot
(sq ft) warehouse building (Building 1) and one approximately 865 sq ft office building
2923 South Tryon Street, Suite 100 3921 Sunset Ridge Rd, Suite 301
Charlotte, NC 28203 Raleigh, NC 27607 www.harthickman.com
704.586.0007 main 919.847.4241 main

Ms. Carolyn Minnich
May 4, 2023
Page 2
(Building 2) at 4200 S. Tryon Street; one approximately 865-sq ft office building (Building 3) at
4208 S. Tryon Street; one approximately 900-sq ft auto repair shop (Building 4) with a detached
garage/storage building and two covered car storage structures at 4214 S. Tryon Street. The
southern portion of the Site (4220 S. Tryon Street) is currently undeveloped land but was
previously developed with a gasoline station and car wash. The western portion of the Site
located at 124 Orchard Circle is developed with an approximate 2,000-sq ft storage structure and
an asphalt driveway. In addition, a north -south oriented overhead powerline right-of-way
transects the 124 Orchard Circle parcel. The 419 W. Peterson Drive Site parcel is developed
with an approximately 730 sq ft single-family residence and a small storage shed. The Site
buildings along S. Tryon Street were recently razed in March 2023. The former Site buildings
(Building 1 through Building 4) are shown in Figure 3.
1.1 Site History
The Site was agricultural and undeveloped land with an overhead powerline right-of-way on the
western portion of the Site prior to the late 1930s. By the late 1940s to the early 1960s, several
single-family residences were constructed on the northeastern portion (4200, 4208, and 4214 S.
Tryon Street) and the western portion (124 Orchard Circle) of the Site. The residences on the
northeastern portion of the Site were converted for commercial uses in the 1960s (4200 S. Tryon
Street), the 1980s (4214 S. Tryon Street), and the 1990s (4208 S. Tryon Street). The current
warehouse building located on the northern portion of the Site was constructed in the 1980s.
Commercial tenant operations in this building have included a heating equipment repair
business, an electric company, a tree service, and transportation services. By the 2010s, the
commercial building located at 4214 S. Tryon Street was converted into an auto repair shop until
operations ceased in March 2023.
The single-family residence located on the western portion of the Site (124 Orchard Circle) was
razed in the 1980s and a warehouse building was constructed for a landscaping and nursery
business. The landscaping and nursery business occupied the western Site parcel in the 1990s
until the 2000s. Since the 2000s, there have been no known occupants on this Site parcel.
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SMARTER ENVIRONMENTAL SOLUTIONS

Ms. Carolyn Minnich
May 4, 2023
Page 3
A gasoline station was constructed and operated on the southern portion of the Site (4220 S.
Tryon Street) as early as the mid-1960s. In the mid-1980s, a self -serve car wash facility was
constructed adjacent to the north of the gasoline station. The gasoline station and car wash
facility ceased operations in 2009 and were demolished in 2018. The southern portion of the Site
has remained undeveloped vacant land with remnants of the car wash foundations since that
time.
The single-family residence at 419 W. Peterson Drive was constructed in the late 1940s and the
storage shed was constructed in the late 1980s. The residence has been occupied for residential
use by multiple tenants since construction.
1.2 Previous Assessment Activities
Former Gasoline Station
A gasoline service station operated at the subject Site from at least 1964 until 2009. In 2002,
four gasoline underground storage tanks (USTs), a diesel UST, and a kerosene UST were
removed from the facility. During UST closure activities, a petroleum release (Incident No.
24139) was discovered.
Soil samples were collected for laboratory analysis and results indicated the presence of
petroleum -related compounds at concentrations above the North Carolina Department of
Environmental Quality (DEQ) UST Section Maximum Soil Contaminant Concentrations
(MSCCs) in the vicinity of the former USTs, product piping, and product dispensers. Based on
information provided in available reports, impacted soil was not removed during UST closure
activities.
Additional Site assessment activities included advancing eleven (11) soil borings and the
installation of sixteen (16) permanent monitoring wells to further evaluate soil and groundwater
impacts as part of Phase I and Phase II Limited Site Assessments (LSAs) and a Comprehensive
Site Assessment (CSA). Assessment results indicated that soil compound concentrations were
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May 4, 2023
Page 4
present at levels above the DEQ UST Section Soil -to -Groundwater and Residential MSCCs, and
compounds were detected in groundwater at concentrations above the DEQ 2L Groundwater
Quality Standards (2L Standards). Additionally, benzene and methyl tert butyl ether (MTBE)
exceeded DEQ UST Section Gross Contamination Levels (GCLs) in two groundwater
monitoring wells.
In July 2017, an aggressive fluid vapor recovery (AFVR) event was conducted at the Site to
reduce benzene and MTBE concentrations. Benzene and MTBE were not detected above GCLs
in AFVR confirmation groundwater sampling events completed in July and October 2017.
Because no compounds exceeded GCLs during the July and October 2017 sampling events, DEQ
issued a Conditional Notice of No Further Action (NFA) for the release incident on December 4,
2017. The Conditional NFA letter required the recordation of a Notice of Residual Petroleum
(NORP) on the property deed restricting groundwater use at the property and restricting the
property use to commercial/industrial purposes because compound concentrations above the
DEQ UST Section Residential MSCCs remained in Site soil. The NORP for the property was
finalized and recorded in January 2019.
Information provided in the NORP indicated that remedial activities could be completed to
remove impacted soil and the commercial and industrial land use restriction. Additional soil
assessment and remedial excavation activities were completed at the subject Site in January 2020
and January 2021. Results of pre -excavation soil samples indicated that one soil sample,
collected in the vicinity of a former dispenser island at a depth of 8 to 10 feet below the ground
surface, contained C5-C8 aliphatics and total C9-C22 aromatics hydrocarbon fractions at
concentrations above DEQ UST Section Residential MSCCs. No other samples contained target
compounds at concentrations above Residential MSCCs.
Approximately 259 tons of impacted soil containing concentrations of compounds above
residential MSCCs were removed from the area of the former dispenser island and transported
off -Site for disposal. Results of four post -excavation confirmation soil samples indicated that
impacted soil was adequately removed, and target compounds were not present at concentrations
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May 4, 2023
Page 5
above the laboratory detection limits. Based on the remedial excavation activities and post -
excavation confirmation soil sample results, DEQ issued a revised NORP on April 1, 2021,
which no longer included a commercial and industrial land use restriction. However, the
groundwater use restriction remains on the revised NORP because compound concentrations
were identified at levels above the DEQ 2L Standards in the July and October 2017 groundwater
sampling events.
The UST release incident has been addressed to the satisfaction of DEQ based on the results of
risk evaluations and the implementation of a groundwater use restriction.
2022 Phase I ESA
In July 2022, Terracon Consultants, Inc. (Terracon) completed a Phase I Environmental Site
Assessment (ESA) for property transaction due diligence purposes and identified the following
Recognized Environmental Conditions (RECs) in connection with the Site:
• The potential for impact from an undocumented release associated with automotive
operations conducted at the 4214 S. Tryon Street parcel since approximately 2004.
• The potential for impact from an undocumented release associated with car washing
activities conducted on the 4220 S. Tryon Street parcel from approximately 1980 to 2018.
Specifically, the potential for impact near the car wash bay drain systems and the
associated subgrade oil/water separator.
In addition, Terracon identified the following Controlled REC (CREC) associated with the Site:
• Residual impacts associated with the former Servco underground storage tank (UST)
release that received a risk based No Further Action designation with implementation of a
groundwater use restriction.
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hart � hickman
SMARTER ENVIRONMENTAL SOLUTIONS

Ms. Carolyn Minnich
May 4, 2023
Page 6
Phaca IT FCA
Based on the results of the Phase I ESA, H&H completed a Phase II ESA in November 2022.
H&H completed soil, groundwater, and soil gas sampling activities at the Site to evaluate the
potential for impact and to assist in the management of Site media during planned redevelopment
activities.
Soil assessment activities included collection of multiple soil samples for laboratory analysis
from areas of potential concern (areas of staining associated with auto repair operations, adjacent
to a subgrade oil/water separator at the former car wash, and adjacent to drains located within the
former car wash bays), and in areas of where shallow soil disturbance is likely during future
grading activities associated with Site redevelopment. Results of soil sampling activities
identified benzo(a)pyrene at a concentration slightly above the DEQ Residential Preliminary Soil
Remediation Goal (PSRG) but below the DEQ Industrial/Commercial PSRG in one shallow soil
sample collected in the northeastern portion of the 124 Orchard Circle Site parcel. No other
compounds were detected at concentrations above the DEQ PSRGs (or background levels in the
case of metals) in soil samples collected at the Site including those soil samples collected in
areas of potential concern identified in the previously completed Phase I ESA.
Groundwater samples were collected in the north -central portion of the Site, downgradient of the
on -Site auto repair operations, and near the area of the former carwash drains and oil/water
separator system. The results of groundwater sampling activities did not identify the presence of
compounds at concentrations above the 2L Standards or the DEQ Vapor Intrusion Groundwater
Screening Levels (GWSLs).
Soil gas assessment activities were completed at the Site to evaluate the potential for structural
vapor intrusion into a future multi -family apartment building. Soil gas sample laboratory
analytical results identified multiple petroleum -related compounds at concentrations above the
DEQ Vapor Intrusion Sub -slab and Exterior Soil Gas Screening Levels (SGSLs) in the soil gas
samples collected from areas nearest the former gasoline station on the southern portion of the
Site. The soil gas sampling results are generally consistent with impacts previously identified in
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May 4, 2023
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connection with the leaking UST system and the results of the Phase II ESA soil and
groundwater sampling results which did not identify impacts in other portions of the Site.
Using the highest concentration of any compound detected in exterior soil gas, residential use
risk calculator results for the soil gas to indoor air vapor intrusion pathway indicated that the
cumulative lifetime incremental carcinogenic risk (LICR) and cumulative noncarcinogenic
hazard index (HI) values exceed the DEQ and EPA acceptable levels of 1 x 10-4 and 1,
respectively. It is important to note that trichloroethene (TCE) was not detected at
concentrations above the laboratory method detection limits in soil, groundwater, or soil gas
samples collected at the Site. It is also important to note that the primary driver for potential
vapor intrusion risks is the contributions of petroleum -related compounds detected in soil gas
samples collected nearest the former Service Distributing Co. UST release incident.
To address environmental concerns, Boulevard at LoSo Tract 2, LLC (Boulevard) elected to
enter the Site (4200, 4208, 4214, and 4220 S. Tryon Street and 124 Orchard Circle) into the DEQ
Brownfields Redevelopment Section on September 9, 2022 and received a letter of eligibility on
January 12, 2023. A kick-off/data gap meeting with the DEQ Brownfields Redevelopment
Section, Boulevard, and H&H was held on April 12, 2023, to discuss prior Site history, proposed
redevelopment plans, data gaps, and the addition of the 419 W. Peterson Drive parcel to the
Brownfields Property. Boulevard submitted an amended Brownfields Property Application to
include the 419 W. Peterson Drive parcel in the Brownfields property on April 27, 2023.
On January 31, 2023, on behalf of the PD, H&H requested a demolition approval letter from
DEQ Brownfields prior to the removal of the Site buildings along S. Tryon Street. On March 1,
2023, DEQ requested the collection of sub -slab soil gas samples for laboratory analysis within
the existing Site buildings prior to the demolition activities. At the request of DEQ Brownfields,
H&H collected sub -slab soil gas samples within the Site buildings in March 2023. The sub -slab
soil gas sampling methods and results are discussed in the following sections.
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hart � hickman
SMARTER ENVIRONMENTAL SOLUTIONS

Ms. Carolyn Minnich
May 4, 2023
Page 8
2.0 Sub -Slab Soil Gas Assessment Activities
The sub -slab soil gas sampling activities were conducted in general accordance with the DEQ
Inactive Hazardous Sites Branch (IHSB) Guidelines for Assessment and Cleanup dated
September 2022, the DEQ Division of Waste Management (DWM) Vapor Intrusion Guidance
(VI Guidance) dated March 2018, the most recent versions of the U.S. Environmental Protection
Agency (EPA) Region IV Laboratory Services and Applies Science Division (LSASD) Field
Branches Quality System and Technical Procedures guidance, and the DEQ Brownfields
Environmental Site Assessment Work Plan Minimum Requirements Checklist dated March
2023. A summary of the sub -slab soil gas sampling activities is provided below.
2.1 Sub -Slab Soil Gas Sampling Activities
H&H installed four (4) sub -slab soil gas sample points (SSV-1 through SSV-4) within the
existing Site buildings. The sample locations are shown in Figure 3 and described further below.
• Sub -slab soil gas sample SSV-1 was collected in Building 1;
• Sub -slab soil gas sample SSV-2 was collected in Building 2;
• Sub -slab soil gas sample SSV-3 was collected in Building 3; and
• Sub -slab soil gas sample SSV-4 was collected in Building 4.
It should be noted that Building 2, Building 3, and Building 4 were constructed with crawl
spaces beneath the majority of the building footprints. Therefore, sub -slab soil gas samples
SSV-2 through SSV-4 were collected from only slab -on -grade portions of those Site buildings
which included entrance landings and utility closets.
The sub -slab soil gas sampling points were installed using a rotary hammer drill and 1 %2-inch
diameter drill bit to advance a pilot hole into the concrete slab to a depth of approximately 13/4
inches below the surface. A drill guide was then placed in the pilot hole and a 5/8-inch diameter
drill bit was utilized to advance the boring through the concrete slab and approximately 6-inches
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into the underlying soil. Following concrete borehole advancement, loose concrete cuttings were
removed from each boring using a bottlebrush. A Cox -Colvin Vapor PinTM (vapor pin) assembly
(brass sampling point and silicone sleeve) was then seated in the borehole using an
installation/extraction tool and hammer. Upon installation of the vapor pin assembly, dedicated
Teflon® sample tubing was connected to the barbed end of the sample point.
Each sub -slab soil gas sample was collected utilizing a laboratory supplied 1-liter Summa®
canister connected to an air -flow regulator calibrated by the laboratory to collect the soil gas
samples at a rate of approximately 100 mL/min. Prior to the collection of the soil gas samples,
"shut-in" tests were conducted on the sampling train and helium leak checks were conducted at
each soil gas sampling point. A description of the shut-in test and helium leak testing procedures
is provided below.
The shut-in test was conducted by connecting the flow regulator and vacuum gauge to the
Summa® canister and sealing the flow regulator with the laboratory provided brass cap. Once
the sampling train was "closed", the sample valve on the Summa® canister was opened and the
reading on the vacuum gauge was recorded. The Summa® canister sample valve was then
closed, and the vacuum gauge was observed to ensure no vacuum loss occurred. If the vacuum
reading remained the same, the shut-in test was considered successful. If vacuum loss occurred,
the flow regulator and/or brass cap was reseated, and the shut-in test was repeated until the
vacuum reading remained stable. Each Summa® canister passed the shut-in test.
Following a successful shut-in test, the Summa® canister was connected to the sample point via
Teflon® sample tubing using a brass nut and ferrule assembly to create an airtight seal and a leak
check was performed on the sampling point. The leak check was performed by constructing a
shroud over the sampling point and sample train and flooding the shroud with helium gas.
Helium concentrations inside the shroud were measured using a helium gas detector and
maintained at concentrations greater than 10%. Once helium concentrations stabilized within the
shroud, the sample tubing was purged outside of the shroud using a syringe and a three-way
valve to collect purged soil gas into a Tedlar® bag. The purged soil gas was then analyzed using
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the helium gas detector to ensure that helium concentrations in the soil gas sample were less than
10% of the helium concentrations measured within the shroud. Each sub -slab soil gas sampling
point passed the helium leak check criteria.
Following successful leak checks, the sub -slab soil gas samples were collected by opening the
intake valve on the Summa® canister. Vacuum readings on the Summa® canisters were recorded
prior to and following the sampling period to ensure adequate sample volume was collected. A
vacuum of approximately 5 inches of mercury or more was maintained within each Summa®
canister at the conclusion of the sampling activities in accordance with DEQ DWM Vapor
Intrusion guidance. Following sample collection, the Summa® canisters were shipped to
Waypoint Analytical under standard chain -of -custody protocols for analysis of VOCs by EPA
Method TO-15. Upon receipt of the samples, the laboratory recorded the final received vacuum
pressure for each Summa® canister.
After sampling was completed, the sample locations were estimated by measuring from known
benchmarks within the Site building (e.g., exterior walls, door frames, etc.). The sample
locations were permanently abandoned and the surfaces were repaired similar to pre -drilling
conditions.
2.2 Sub -Slab Soil Gas Sampling Results
A tabular summary of the sub -slab soil gas sample laboratory analytical results is provided as
Table 1. The analytical results were compared to the DEQ Residential and Non -Residential
Vapor Intrusion SGSLs dated January 2023. A copy of the laboratory analytical report and chain
of custody record is provided in Appendix A.
Laboratory analytical results indicate that several compounds were detected at concentrations
above the laboratory method detection limits in each sub -slab soil gas sample. Chloroform (up
to 612 micrograms per cubic meter [µg/m3]) was detected in the soil gas sample and its duplicate
sub -slab soil gas sample collected within Building 4 (SSV-4/SSV-DUP) at concentrations above
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the DEQ Residential and Non -Residential Vapor Intrusion SGSLs of 4.1 µg/m3 and 53 µg/m3,
respectively. In addition, bromodichloromethane (up to 30.4 µg/m3) was also detected at a
concentration exceeding the DEQ Residential Vapor Intrusion SGSL of 2.5 µg/m3 but below the
DEQ Non -Residential Vapor Intrusion SGSL of 33 µg/m3 in the SSV-4 sub -slab soil gas sample
and its duplicate sample collected from Building 4. No other compounds were detected at
concentrations above the DEQ Vapor Intrusion SGSLs in the Building 4 sub -slab soil gas
samples.
No compounds were detected at concentrations above the DEQ Vapor Intrusion SGSLs in the
sub -slab soil gas samples collected from Building 1 through Building 3. It is important to note
that TCE was not detected at concentrations above the laboratory method detection limits in sub -
slab soil gas samples collected at the Site.
2.3 Vapor Intrusion Evaluation
The DEQ Vapor Intrusion SGSLs used for comparison to the laboratory analytical results are
conservative and based upon a Target Cancer Risk (TCR) of 1 x 10-6 for potential carcinogenic
effects and a Target Hazard Quotient (THQ) of 0.2 for potential noncarcinogenic effects. Vapor
intrusion mitigation or additional assessment is not typically warranted if the calculated
cumulative lifetime incremental carcinogenic risk (LICR) is I x 10' or less and the calculated
cumulative noncarcinogenic Hazard Index (HI) is 1.0 or less. Note that the HI is the sum of
THQ values for each detected compound.
H&H utilized the DEQ Risk Calculator (January 2023) assuming a residential land use scenario
to further evaluate potential cumulative risks for the soil gas to indoor air vapor intrusion
pathway. To model the potential vapor intrusion risks under a hypothetical "worst -case"
scenario, H&H conservatively calculated the cumulative risks using the highest compound
concentrations detected in any sub -slab soil gas sample.
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May 4, 2023
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Hypothetical worst case risk calculator results indicate a cumulative LICR of 1.6 x 10-4 for
potential carcinogenic risks and a cumulative HI of 0.22 for potential noncarcinogenic risks.
Based on risk calculator results, the cumulative LICR is above acceptable levels for a residential
use scenario but the noncarcinogenic HI is within the acceptable level. Review of the risk
calculations indicates that the primary driver of potential carcinogenic risks is the chloroform
concentrations detected in the Building 4 sub -slab soil gas samples. A copy of the completed
risk calculator is provided in Appendix C.
3.0 Quality Assurance — Quality Control
For quality assurance and quality control purposes (QA/QC), non -dedicated equipment and tools
were decontaminated prior to use at each sampling location. One field QA/QC sample was
analyzed to determine potential variability introduced in sampling, handling, shipping, and
analysis.
H&H collected one duplicate sub -slab soil gas sample from sample location SSV-4 within
Building 4 to evaluate the precision of the field sampling procedures, sample matrix variability,
and analytical reproducibility. The duplicate sub -slab soil gas sample was collected concurrently
with the parent sample using a laboratory supplied T-fitting which allows for collection of two
samples from one sub -slab soil gas sampling point simultaneously. The sample was analyzed for
the same parameters as the parent sample, and the analytical results were compared with those of
the parent sample. The analytical results of the parent sample and the duplicate sample were
used to evaluate the cumulative precision of the analytical method, sample matrix, and sample
collection techniques.
The duplicate sample laboratory analytical results are presented in Table 1. Review of the
duplicate sample results for the sub -slab soil gas sample did not indicate significant variability
when compared with the results of the parent sample.
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May 4, 2023
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4.0 Summary and Conclusions
On March 2, 2023, H&H completed sub -slab soil gas assessment activities in the Site buildings
formerly located along S. Tryon Street at the former Service Distributing Co. Brownfields
property (Brownfields Project No. 26065-22-060). The Site buildings were razed following the
completion of the sampling activities.
Sampling activities included the collection of one sub -slab soil gas sample for laboratory
analysis from a slab on grade portion of each building (Building 1 through Building 4). Results
of the sub -slab soil gas assessment activities indicate that bromodichloromethane and chloroform
are present at concentrations above the DEQ Vapor Intrusion SGSLs in the sub -slab soil gas
sample and its duplicate soil gas sample collected from Building 4 (Figure 3). No other
compounds, including chlorinated solvents, were detected in sub -slab soil gas at concentrations
above the SGSLs. The chlorinated solvent TCE was not detected at concentrations above the
laboratory method detection limits in sub -slab soil gas samples collected at the Site. This is
consistent with results of previous soil gas sampling completed at the Site.
Using the highest concentration of any compound detected in sub -slab soil gas, residential use
risk calculator results for the sub -slab soil gas to indoor air vapor intrusion pathway indicate that
the cumulative LICR and cumulative HI values above the DEQ and EPA acceptable levels of
1 x 10' and 1.0, respectively. However, review of the risk calculators indicates that the
compound concentrations detected in the Building 4 sub -slab soil gas sample are the primary
driver of the risk exceedances.
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May 4, 2023
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in summary, based on the results of assessment activities completed at the Site to date, potential
structural vapor intrusion into the proposed residential buildings can be managed in accordance
with a DEQ-approved Vapor Intrusion Mitigation Plan, Should you have questions or require
additional information, please do not hesitate to contact its.
Sincerely,
Hart & Hickman, PC
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Ralph McGee, PG Loryn Smith
Senior Project Manager Project Environmental Scientist
cc: Mr. Michael Bender, Boulevard Realty Estate Advisors (Via Email)
Mr. Chris Branch, Boulevard Realty Estate Advisors (Via Email)
Attachments:
Table 1 Summary of Sub -Slab Soil Gas Assessment Data
Figure 1 Site Location Map
Figure ? Site Map
Figure 3 Sample Location Map
Appendix A Laboratory Analytical Report
Appendix B Field Sampling Forms
Appendix C DEQ Risk Calculators (January 2023)
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Tables

Table 1
Summary of Sub -Slab Soil Gas Analytical Data
Former Service Distributing Co.
Charlotte, North Carolina
H&H Job No. BOU-024
Evaluation Area
Building 1
Building 2
Building 3
Building 4
Screening Criteria
Sample ID
SSV-1
SSV-2
SSV-3
SSV-4 / SSV-DUP
Residential SGSLs ('>
Non -Residential
SGSLs
Sample Date
3/2/2023
Sample Type
Sub -Slab Soil Gas
Units
pg/m3
VOCs (TO-15)
Acetone
43.7
212
77.6
135
140
NE
NE
Benzene
0.830 J
0.412 J
0.396 J
0.242 J
<0.073
12
160
Bromodichloromethane
<0.150
<0.150
<0.150
30.4
30.4
2.5
33
Carbon Disulfide
1.35 J
2.95 J
6.33
2.36 J
2.36 J
4,900
61,000
Chloroform
<0.086
0.864 J
0.668 J
593
612
4.1
53
Dichlorodifluoromethane
2.79
2.86
2.86
2.82
2.81
700
8,800
1,4-Dioxane
<0.435
6.09
0.749 J
<0.435
<0.435
19
250
Ethyl Acetate
0.392 J
<0.136
<0.136
<0.136
<0.136
490
6,100
Ethylbenzene
0.334 J
<0.106
<0.106
0.681 J
0.607 J
37
490
4-Ethyltoluene
<0.128
<0.128
0.884 J
<0.128
<0.128
NE
NE
1,1,2-Trichloro-1,2,2-trifluoroethane
0.605 J
<0.561
<0.561
<0.561
<0.561
35,000
440,000
Heptane
1.50 J
0.381 J
<0.143
<0.143
<0.143
2,800
35,000
n-Hexane
1.59 J
0.521 J
0.451 J
0.292 J
0.296 J
4,900
61,000
2-Hexanone
0.696 J
<0.285
<0.285
0.606 J
0.577 J
210
2,600
Isopropyl Alcohol
6.91 B
9.79 B
6.46 B
6.28 B
6.74 B
1,400
18,000
Methyl Ethyl Ketone (MEK)
12.5
5.34
3.70
7.67
7.38
35,000
440,000
4-Methyl-2-Pentanone
2.57
1.59 J
0.294 J
0.671 J
0.716 J
21,000
260,000
Methylene Chloride
4.19
2.97
2.67
13.4
8.29
3,400
53,000
Naphthalene
1.34 J
1.49 J
<0.183
<0.183
<0.183
2.8
36
Propene
4.28
<0.242
<0.242
<0.242
<0.242
21,000
260,000
Tetrachloroethene
6.12
<0.181
<0.181
<0.181
<0.181
280
3,500
Tetrahydrofuran
0.492 J
0.439 J
0.492 J
<0.107
<0.107
14,000
180,000
Toluene
1.89
1.47 J
6.84
0.727 J
0.757 J
35,000
440,000
Trichlorofluoromethane
1.97 J
1.78 J
1.90 J
1.91 J
1.92 J
NE
NE
1,2,4-Trimethylbenzene
2.06 J
1.30 J
8.06
<0.110
<0.110
420
5,300
1,3,5-Trimethylbenzene
0.466 J
0.427 J
2.13 J
<0.236
<0.236
420
5,300
o-Xylene
0.521 J
0.356 J
0.751 J
1.44 J
1.39 J
700
8,800
mp-Xylene
0.851 J
0.573 J
0.829 J
2.09 J
2.08 J
700
8,800
DEQ Cumulative Risk Calculator (2)
Acceptable Risk Levels
<1.0 x 10'
Residential Worst -Case LICR
1.6 x 10'
Residential Worst -Case Non -Carcinogenic HI
0.22
<1.0
Notes:
1) North Carolina Department of Environmental Quality (DEQ) Vapor Intrusion Sub -Slab & Exterior Soil Gas Screening Levels (SGSLs) dated January 2023 and based on a TCR of 1 x10-6 and a THQ of 0.2.
2) DEQ Cumulative Risk Calculator dated January 2023.
Concentrations are reported in micrograms per cubic meter (pg/m3).
Compound concentrations are reported to the laboratory method detection limits.
Laboratory analytical method is shown in parentheses.
Only compounds detected in at least one sample are shown in the table above.
Bold values indicate an exceedance of Residential SGSLs.
Underlined values indicate an exceedance of Non -Residential SGSLs.
VOCs = volatile organic compounds; NE = not established; LICR = lifetime incremental cancer risk; HI = hazard index; TCR = Target Cancer Risk; THQ = Target Hazrd Quotient
J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration.
B = Compound was detected in the laboratory method blank.
Table 1 (Page 1 of 1)
htlps://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Boulevard Realty Estate Advisors (BOU)/BOU-0244220 S. Tryon St/Sub-Slab Soil Gas Assessment/Tables/Data Table
5/2/2023 Hart & Hickman, PC

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TITLE
SITE LOCATION MAP
0 2,000 4,000
NPROJECT
L SCALE IN FEET FORMER SERVICE DISTRIBUTING CO.
- S. TRYON STREETAND ORCHARD CIRCLE
U.S.G.S. QUADRANGLE MAP CHARLOTTE, NORTH CAROLINA
2923 South Tryon Street - Suite 100
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LEGEND
BROWNFIELDS PROPERTY BOUNDARY
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0 FORMER BUILDING CRAWL SPACE
® SUB -SLAB SOIL GAS SAMPLE LOCATION
NOTES
1. PARCEL DATA OBTAINED FROM MECKLENBURG COUNTY
GIS (2022).
2. SUB -SLAB SOIL GAS SAMPLES COLLECTED BY H&H ON
MARCH 2, 2023.
3. SITE BUILDINGS RAZED BETWEEN MARCH 3, 2023 AND
MARCH 9, 2023.
8
APPROXIMATE
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SCALE IN FEET
TLE
SAMPLE LOCATION MAP
1F.,IF�T
FORMER SERVICE DISTRIBUTING CO.
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CHARLOTTE, NORTH CAROLINA
hart h i c k m a n Char South Tryon Street -Stolen 282 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f
SMARTER ENVIRONMENTAL SOLUTIONS License # C-1269 / #C-245 Geology
DATE: 5-3-23 REVISION NO. 0
JOB NO. BOU-024 FIGURE NO. 3

Appendix A
Laboratory Analytical Report

Waypointo
ANALYTICAL
3/8/2023
Hart & Hickman (Charlotte)
Loryn Smith
2923 South Tryon St. Ste 100
Charlotte, NC, 28203
Ref: Analytical Testing
Lab Report Number: 23-061-0020
Client Project Description: BOU-024
Dear Loryn Smith:
449 5pringbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Waypoint Analytical, LLC (Charlotte) received sample(s) on 3/2/2023 for the analyses presented in the
following report.
The above referenced project has been analyzed per your instructions. The analyses were performed in
accordance with the applicable analytical method.
The analytical data has been validated using standard quality control measures performed as required by the
analytical method. Quality Assurance, method validations, instrumentation maintenance and calibration for all
parameters were performed in accordance with guidelines established by the USEPA (including 40 CFR 136
Method Update Rule May 2021) unless otherwise indicated.
Certain parameters (chlorine, pH, dissolved oxygen, sulfite...) are required to be analyzed within 15 minutes of
sampling. Usually, but not always, any field parameter analyzed at the laboratory is outside of this holding time.
Refer to sample analysis time for confirmation of holding time compliance.
The results are shown on the attached Report of Analysis(s). Results for solid matrices are reported on an as -
received basis unless otherwise indicated. This report shall not be reproduced except in full and relates only to
the samples included in this report.
Please do not hesitate to contact me or client services if you have any questions or need additional information.
Sincerely,
a'-1
Angela D Overcash
Senior Project Manager
Laboratory's liability in any claim relating to analyses performed shall be limited to, at laboratory's option, repeating the
analysis in question at laboratory's expense, or the refund of the charges paid for performance of said analysis.
Page 1 of 30

Waypointo
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalyticaI.com
Certification Summary
Laboratory ID: WP CNC: Waypoint Analytical Carolina, Inc. (C), Charlotte, NC
State
Program
Lab ID
Expiration Date
North Carolina
State Program
37735
07/31/2023
North Carolina
State Program
402
12/31/2023
South Carolina
State Program
99012
07/31/2023
South Carolina
State Program
99012
12/31/2022
Page 1 of 1 00016/23-061-0020
Page 2 of 30

Waypoint. (2) 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointana iytica i.com
Sample Summary Table
Report Number: 23-061-0020
Client Project Description: BOU-024
Lab No Client Sample ID Matrix Date Collected Date Received
90050
SSV-DUP
Air
03/02/2023
03/02/2023
14:05
90051
SSV-4
Air
03/02/2023
13:37
03/02/2023
14:05
90052
SSV-2
Air
03/02/2023
12:44
03/02/2023
14:05
90053
SSV-3
Air
03/02/2023
13:09
03/02/2023
14:05
90054
SSV-1
Air
03/02/2023
12:14
03/02/2023
14:05
Page 3 of 30

(D
Waypoint, 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
Summary of Detected Analytes
Project: BOU-024
Report Number: 23-061-0020
Client Sample ID Lab Sample ID
Method Parameters
Result Units Report Limit Analyzed Qualifiers
SSV-DUP
V 90050
TO-15
Acetone
140
pg/m3
4.04
03/03/202318:42
TO-15
Bromodichloromethane
30.4
pg/m3
0.150
03/06/2023 20:23
TO-15
Carbon Disulfide
2.36
pg/m3
0.060
03/06/2023 20:23
TO-15
Chloroform
612
pg/m3
1.73
03/03/202318:42
TO-15
Dichlorodifluoromethane
2.81
pg/m3
0.134
03/06/2023 20:23
TO-15
Ethylbenzene
0.607
pg/m3
0.106
03/06/2023 20:23
TO-15
n-Hexane
0.296
pg/m3
0.047
03/06/2023 20:23
TO-15
2-Hexanone
0.577
pg/m3
0.285
03/06/2023 20:23
TO-15
Isopropyl Alcohol
6.74
pg/m3
0.139
03/06/2023 20:23
TO-15
Methyl Ethyl Ketone (MEK)
7.38
pg/m3
0.224
03/06/2023 20:23
TO-15
4-Methyl-2-Pentanone
0.716
pg/m3
0.121
03/06/2023 20:23
TO-15
Methylene Chloride
8.29
pg/m3
0.488
03/06/2023 20:23
TO-15
Toluene
0.757
pg/m3
0.090
03/06/2023 20:23
TO-15
Trichlorofluoromethane
1.92
pg/m3
0.130
03/06/2023 20:23
TO-15
o-Xylene
1.39
pg/m3
0.157
03/06/2023 20:23
TO-15
m,p-Xylene
2.08
pg/m3
0.217
03/06/2023 20:23
TO-15
Xylene (Total)
3.47
pg/m3
0.157
03/06/2023 20:23
SSV-4
V 90051
TO-15
Acetone
135
pg/m3
4.04
03/03/202319:19
TO-15
Benzene
0.242
pg/m3
0.073
03/06/2023 21:15
TO-15
Bromodichloromethane
30.4
pg/m3
0.150
03/06/2023 21:15
TO-15
Carbon Disulfide
2.36
pg/m3
0.060
03/06/2023 21:15
TO-15
Chloroform
593
pg/m3
1.73
03/03/202319:19
TO-15
Dichlorodifluoromethane
2.82
pg/m3
0.134
03/06/2023 21:15
TO-15
Ethylbenzene
0.681
pg/m3
0.106
03/06/2023 21:15
TO-15
n-Hexane
0.292
pg/m3
0.047
03/06/2023 21:15
TO-15
2-Hexanone
0.606
pg/m3
0.285
03/06/2023 21:15
TO-15
Isopropyl Alcohol
6.28
pg/m3
0.139
03/06/2023 21:15
TO-15
Methyl Ethyl Ketone (MEK)
7.67
pg/m3
0.224
03/06/2023 21:15
TO-15
4-Methyl-2-Pentanone
0.671
pg/m3
0.121
03/06/2023 21:15
TO-15
Methylene Chloride
13.4
pg/m3
0.488
03/06/2023 21:15
TO-15
Toluene
0.727
pg/m3
0.090
03/06/2023 21:15
TO-15
Trichlorofluoromethane
1.91
pg/m3
0.130
03/06/2023 21:15
TO-15
o-Xylene
1.44
pg/m3
0.157
03/06/2023 21:15
TO-15
m,p-Xylene
2.09
pg/m3
0.217
03/06/2023 21:15
TO-15
Xylene (Total)
3.53
pg/m3
0.157
03/06/2023 21:15
IJ
J
J
J
B
IJ
0
IJ
J
J
J
B
IJ
Page 4 of 30

(D
Waypoint, 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
Summary of Detected Analytes
Project: BOU-024
Report Number: 23-061-0020
Client Sample ID Lab Sample ID
Method Parameters
Result Units Report Limit Analyzed
SSV-2
V 90052
TO-15
Acetone
212
pg/m3
4.04
03/03/202319:56
TO-15
Benzene
0.412
pg/m3
0.073
03/06/2023 22:05
TO-15
Carbon Disulfide
2.95
pg/m3
0.060
03/06/2023 22:05
TO-15
Chloroform
0.864
pg/m3
0.086
03/06/2023 22:05
TO-15
Dichlorodifluoromethane
2.86
pg/m3
0.134
03/06/2023 22:05
TO-15
1,4-Dioxane
6.09
pg/m3
0.435
03/06/2023 22:05
TO-15
Heptane
0.381
pg/m3
0.143
03/06/2023 22:05
TO-15
n-Hexane
0.521
pg/m3
0.047
03/06/2023 22:05
TO-15
Isopropyl Alcohol
9.79
pg/m3
0.139
03/06/2023 22:05
TO-15
Methyl Ethyl Ketone (MEK)
5.34
pg/m3
0.224
03/06/2023 22:05
TO-15
4-Methyl-2-Pentanone
1.59
pg/m3
0.121
03/06/2023 22:05
TO-15
Methylene Chloride
2.97
pg/m3
0.488
03/06/2023 22:05
TO-15
Naphthalene
1.49
pg/m3
0.183
03/06/2023 22:05
TO-15
Tetrahydrofuran
0.439
pg/m3
0.107
03/06/2023 22:05
TO-15
Toluene
1.47
pg/m3
0.090
03/06/2023 22:05
TO-15
Trichlorofluoromethane
1.78
pg/m3
0.130
03/06/2023 22:05
TO-15
1,2,4-Trimethylbenzene
1.30
pg/m3
0.110
03/06/2023 22:05
TO-15
1,3,5-Trimethylbenzene
0.427
pg/m3
0.236
03/06/2023 22:05
TO-15
o-Xylene
0.356
pg/m3
0.157
03/06/2023 22:05
TO-15
m,p-Xylene
0.573
pg/m3
0.217
03/06/2023 22:05
TO-15
Xylene (Total)
0.929
pg/m3
0.157
03/06/2023 22:05
SSV-3
V 90053
TO-15
Acetone
77.6
pg/m3
0.202
03/06/2023 22:58
TO-15
Benzene
0.396
pg/m3
0.073
03/06/2023 22:58
TO-15
Carbon Disulfide
6.33
pg/m3
0.060
03/06/2023 22:58
TO-15
Chloroform
0.668
pg/m3
0.086
03/06/2023 22:58
TO-15
Dichlorodifluoromethane
2.86
pg/m3
0.134
03/06/2023 22:58
TO-15
1,4-Dioxane
0.749
pg/m3
0.435
03/06/2023 22:58
TO-15
4-Ethyltoluene
0.884
pg/m3
0.128
03/06/2023 22:58
TO-15
n-Hexane
0.451
pg/m3
0.047
03/06/2023 22:58
TO-15
Isopropyl Alcohol
6.46
pg/m3
0.139
03/06/2023 22:58
TO-15
Methyl Ethyl Ketone (MEK)
3.70
pg/m3
0.224
03/06/2023 22:58
TO-15
4-Methyl-2-Pentanone
0.294
pg/m3
0.121
03/06/2023 22:58
TO-15
Methylene Chloride
2.67
pg/m3
0.488
03/06/2023 22:58
TO-15
Tetrahydrofuran
0.492
pg/m3
0.107
03/06/2023 22:58
TO-15
Toluene
6.84
pg/m3
0.090
03/06/2023 22:58
Qualifiers
I
J
J
B
I
J
J
J
J
J
J
J
J
J
J
J
J
J
J
B
J
J
Page 5 of 30

(D
Waypoint, 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
Summary of Detected Analytes
Project: BOU-024
Report Number: 23-061-0020
Client Sample ID
Method
Lab Sample ID
Parameters
Result
Units
Report Limit
Analyzed
Qualifiers
SSV-3
V 90053
TO-15
Trichlorofluoromethane
1.90
pg/m3
0.130
03/06/2023 22:58
J
TO-15
1,2,4-Trimethylbenzene
8.06
pg/m3
0.110
03/06/2023 22:58
TO-15
1,3,5-Trimethylbenzene
2.13
pg/m3
0.236
03/06/2023 22:58
J
TO-15
o-Xylene
0.751
pg/m3
0.157
03/06/2023 22:58
J
TO-15
m,p-Xylene
0.829
pg/m3
0.217
03/06/2023 22:58
J
TO-15
Xylene (Total)
1.58
pg/m3
0.157
03/06/2023 22:58
J
SSV-1
V 90054
TO-15
Acetone
43.7
pg/m3
0.202
03/06/2023 23:50
TO-15
Benzene
0.830
pg/m3
0.073
03/06/2023 23:50
J
TO-15
Carbon Disulfide
1.35
pg/m3
0.060
03/06/2023 23:50
J
TO-15
Dichlorodifluoromethane
2.79
pg/m3
0.134
03/06/2023 23:50
TO-15
Ethyl Acetate
0.392
pg/m3
0.136
03/06/2023 23:50
J
TO-15
Ethylbenzene
0.334
pg/m3
0.106
03/06/2023 23:50
J
TO-15
1,1,2-Trichloro-1,2,2-trifluoroethane
0.605
pg/m3
0.561
03/06/2023 23:50
J
TO-15
Heptane
1.50
pg/m3
0.143
03/06/2023 23:50
J
TO-15
n-Hexane
1.59
pg/m3
0.047
03/06/2023 23:50
J
TO-15
2-Hexanone
0.696
pg/m3
0.285
03/06/2023 23:50
J
TO-15
Isopropyl Alcohol
6.91
pg/m3
0.139
03/06/2023 23:50
B
TO-15
Methyl Ethyl Ketone (MEK)
12.5
pg/m3
0.224
03/06/2023 23:50
TO-15
4-Methyl-2-Pentanone
2.57
pg/m3
0.121
03/06/2023 23:50
TO-15
Methylene Chloride
4.19
pg/m3
0.488
03/06/2023 23:50
TO-15
Naphthalene
1.34
pg/m3
0.183
03/06/2023 23:50
J
TO-15
Propene
4.28
pg/m3
0.242
03/06/2023 23:50
TO-15
Tetrachloroethene
6.12
pg/m3
0.181
03/06/2023 23:50
TO-15
Tetrahydrofuran
0.492
pg/m3
0.107
03/06/2023 23:50
J
TO-15
Toluene
1.89
pg/m3
0.090
03/06/2023 23:50
TO-15
Trichlorofluoromethane
1.97
pg/m3
0.130
03/06/2023 23:50
J
TO-15
1,2,4-Trimethylbenzene
2.06
pg/m3
0.110
03/06/2023 23:50
J
TO-15
1,3,5-Trimethylbenzene
0.466
pg/m3
0.236
03/06/2023 23:50
J
TO-15
o-Xylene
0.521
pg/m3
0.157
03/06/2023 23:50
J
TO-15
m,p-Xylene
0.851
pg/m3
0.217
03/06/2023 23:50
J
TO-15
Xylene (Total)
1.37
pg/m3
0.157
03/06/2023 23:50
J
Page 6 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90050
Matrix: Air
Sample ID: SSV-DUP
Sampled:
3/2/2023 0:00
Analytical Method:
TO-15
Prep Batch(es):
V30S39
03/06/23 09:00
V30S69
03/03/23 09:00
Prep Method:
TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
140
pg/m3
4.04
95.0
20
03/03/2318:42
ENM
V30574
Benzene
<0.073
pg/m3
0.073
1.60
1
03/06/23 20:23
ENM
V30540
Benzyl Chloride
<0.147
pg/m3
0.147
10.4
1
03/06/23 20:23
ENM
V30540
Bromodichloromethane
30.4
pg/m3
0.150
3.35
1
03/06/23 20:23
ENM
V30540
Bromoform
<0.153
pg/m3
0.153
5.17
1
03/06/23 20:23
ENM
V30540
Bromomethane
<0.115
pg/m3
0.115
1.94
1
03/06/23 20:23
ENM
V30540
1,3-Butadiene
<0.328
pg/m3
0.328
1.11
1
03/06/23 20:23
ENM
V30540
Carbon Disulfide
2.363
pg/m3
0.060
6.23
1
03/06/23 20:23
ENM
V30540
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
03/06/23 20:23
ENM
V30540
Chlorobenzene
<0.107
pg/m3
0.107
2.30
1
03/06/23 20:23
ENM
V30540
Chlorodibromomethane
<0.208
pg/m3
0.208
4.26
1
03/06/23 20:23
ENM
V30540
Chloroethane
<0.164
pg/m3
0.164
1.32
1
03/06/23 20:23
ENM
V30540
Chloroform
612
pg/m3
1.73
48.8
20
03/03/2318:42
ENM
V30574
Chloromethane
<0.067
pg/m3
0.067
1.03
1
03/06/23 20:23
ENM
V30540
Cyclohexane
<0.161
pg/m3
0.161
3.44
1
03/06/23 20:23
ENM
V30540
1,2-Dibromoethane
<0.151
pg/m3
0.151
3.84
1
03/06/23 20:23
ENM
V30540
1,2-Dichlorobenzene
<0.096
pg/m3
0.096
3.01
1
03/06/23 20:23
ENM
V30540
1,3-Dichlorobenzene
<0.174
pg/m3
0.174
12.0
1
03/06/23 20:23
ENM
V30540
1,4-Dichlorobenzene
<0.186
pg/m3
0.186
3.01
1
03/06/23 20:23
ENM
V30540
Dichlorodifluoromethane 2.81
pg/m3
0.134
2.47
1
03/06/23 20:23
ENM
V30540
1,1-Dichloroethane
<0.101
pg/m3
0.101
2.02
1
03/06/23 20:23
ENM
V30540
1,2-Dichloroethane
<0.129
pg/m3
0.129
2.02
1
03/06/23 20:23
ENM
V30540
Qualifiers/ B
Analyte detected in blank
DF
Dilution Factor
Definitions J
Estimated value
MQL
Method Quantitation Limit
Page 7 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020
REPORT OF ANAL YSIS
Lab No : 90050 Matrix: Air
Sample ID: SSV-DUP Sampled: 3/2/2023 0:00
Analytical Method: TO-15 Prep Batch(es): V30539 03/06/23 09:00 V30569 03/03/23 09:00
Prep Method: TO-15 Prep
Test Results Units MDL MQL DF Date / Time By Analytical
Analyzed Batch
1,1-Dichloroethene
<0.107
pg/m3
0.107
1.98
1
03/06/23 20:23
ENM
V30540
cis- 1,2-Dich loroethene
<0.095
pg/m3
0.095
1.98
1
03/06/23 20:23
ENM
V30540
trans-1,2-Dichloroethene
<0.108
pg/m3
0.108
1.98
1
03/06/23 20:23
ENM
V30540
1,2-Dichloropropane
<0.205
pg/m3
0.205
2.31
1
03/06/23 20:23
ENM
V30540
1,2-Dichlorotetrafluoroethane
<0.622
pg/m3
0.622
3.50
1
03/06/23 20:23
ENM
V30540
cis- 1,3-Dich loropropene
<0.178
pg/m3
0.178
2.27
1
03/06/23 20:23
ENM
V30540
trans-1,3-Dichloropropene
<0.178
pg/m3
0.178
2.27
1
03/06/23 20:23
ENM
V30540
1,4-Dioxane
<0.435
pg/m3
0.435
1.80
1
03/06/23 20:23
ENM
V30540
Ethyl Acetate
<0.136
pg/m3
0.136
1.80
1
03/06/23 20:23
ENM
V30540
Ethylbenzene
0.6073
pg/m3
0.106
2.17
1
03/06/23 20:23
ENM
V30540
4-Ethyltoluene
<0.128
pg/m3
0.128
2.46
1
03/06/23 20:23
ENM
V30540
1,1,2-Trichloro-1,2,2-trifluoroethane
<0.561
pg/m3
0.561
3.83
1
03/06/23 20:23
ENM
V30540
Heptane
<0.143
pg/m3
0.143
2.05
1
03/06/23 20:23
ENM
V30540
Hexachlorobutadiene
<0.330
pg/m3
0.330
5.33
1
03/06/23 20:23
ENM
V30540
n-Hexane
0.2963
pg/m3
0.047
1.76
1
03/06/23 20:23
ENM
V30540
2-Hexanone
0.577 J
pg/m3
0.285
2.05
1
03/06/23 20:23
ENM
V30540
Isopropyl Alcohol
6.74 B
pg/m3
0.139
4.92
1
03/06/23 20:23
ENM
V30540
Methyl Ethyl Ketone (MEK)
7.38
pg/m3
0.224
1.47
1
03/06/23 20:23
ENM
V30540
Methyl tert-butyl ether (MTBE)
<0.033
pg/m3
0.033
1.80
1
03/06/23 20:23
ENM
V30540
4-Methyl-2-Pentanone
0.7161
pg/m3
0.121
2.05
1
03/06/23 20:23
ENM
V30540
Methylene Chloride
8.29
pg/m3
0.488
1.74
1
03/06/23 20:23
ENM
V30540
Naphthalene
<0.183
pg/m3
0.183
2.62
1
03/06/23 20:23
ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 8 of 30

WavDdibnto
ANALYTICAL
01102
Hart & Hickman (Charlotte)
Loryn Smith
2923 South Tryon St. Ste 100
Charlotte , NC 28203
Report Number : 23-061-0020
Project BOU-024
Information :
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
REPORT OF ANAL YSIS
Report Date : 03/08/2023
Received : 03/02/2023
Lab No : 90050
Matrix: Air
Sample ID: SSV-DUP
Sampled:
3/2/2023
0:00
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00 V30569
03/03/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Propene
<0.242
Ng/m3
0.242
0.860
1
03/06/23 20:23
ENM
V30540
Styrene
<0.124
ug/m3
0.124
2.13
1
03/06/23 20:23
ENM
V30540
1, 1, 2,2-Tetrach loroetha ne
<0.104
Ng/m3
0.104
3.43
1
03/06/23 20:23
ENM
V30540
Tetrachloroethene
<0.181
ug/m3
0.181
3.39
1
03/06/23 20:23
ENM
V30540
Tetrahydrofuran
<0.107
Ng/m3
0.107
1.47
1
03/06/23 20:23
ENM
V30540
Toluene
0.757 J
ug/m3
0.090
1.88
1
03/06/23 20:23
ENM
V30540
1,2,4-Trichlorobenzene
<0.209
Ng/m3
0.209
3.71
1
03/06/23 20:23
ENM
V30540
1,1,1-Trichloroethane
<0.144
ug/m3
0.144
2.73
1
03/06/23 20:23
ENM
V30540
1, 1, 2-Trich loroetha ne
<0.087
Ng/m3
0.087
2.73
1
03/06/23 20:23
ENM
V30540
Trichloroethene
<0.199
ug/m3
0.199
2.15
1
03/06/23 20:23
ENM
V30540
Trichlorofluoromethane
1.92 J
pg/m3
0.130
2.81
1
03/06/23 20:23
ENM
V30540
1,2,4-Trimethyl benzene
<0.110
ug/m3
0.110
2.46
1
03/06/23 20:23
ENM
V30540
1,3,5-Trim ethyl benzene
<0.236
Ng/m3
0.236
2.46
1
03/06/23 20:23
ENM
V30540
Vinyl Acetate
<0.224
ug/m3
0.224
1.76
1
03/06/23 20:23
ENM
V30540
Vinyl Chloride
<0.127
Ng/m3
0.127
1.28
1
03/06/23 20:23
ENM
V30540
o-Xylene
1.39 J
ug/m3
0.157
2.17
1
03/06/23 20:23
ENM
V30540
m,p-Xylene
2.08 J
Ng/m3
0.217
5.65
1
03/06/23 20:23
ENM
V30540
Xylene (Total)
3.47 J
ug/m3
0.157
2.17
1
03/06/23 20:23
V30540
Surrogate: 4-Bromofluorobenzene
99.4
Limits:
70-130%
1 03/06/23 20:23 ENM
V30540
Surrogate:4-Bromofluorobenzene
95.8
Limits: 70-130%
20 03/03/23 18:42 ENM
V30574
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method
Quantitation Limit
Page 9 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90051
Matrix: Air
Sample ID: SSV-4
Sampled:
3/2/2023 13:37
Analytical Method:
TO-15
Prep Batch(es):
V30539
03/06/23 09:00
V30569
03/03/23 09:00
Prep Method:
TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
135
pg/m3
4.04
95.0
20
03/03/2319:19
ENM
V30574
Benzene
0.2423
pg/m3
0.073
1.60
1
03/06/23 21:15
ENM
V30540
Benzyl Chloride
<0.147
pg/m3
0.147
10.4
1
03/06/23 21:15
ENM
V30540
Bromodichloromethane
30.4
pg/m3
0.150
3.35
1
03/06/23 21:15
ENM
V30540
Bromoform
<0.153
pg/m3
0.153
5.17
1
03/06/23 21:15
ENM
V30540
Bromomethane
<0.115
pg/m3
0.115
1.94
1
03/06/23 21:15
ENM
V30540
1,3-Butadiene
<0.328
pg/m3
0.328
1.11
1
03/06/23 21:15
ENM
V30540
Carbon Disulfide
2.363
pg/m3
0.060
6.23
1
03/06/23 21:15
ENM
V30540
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
03/06/23 21:15
ENM
V30540
Chlorobenzene
<0.107
pg/m3
0.107
2.30
1
03/06/23 21:15
ENM
V30540
Chlorodibromomethane
<0.208
pg/m3
0.208
4.26
1
03/06/23 21:15
ENM
V30540
Chloroethane
<0.164
pg/m3
0.164
1.32
1
03/06/23 21:15
ENM
V30540
Chloroform
593
pg/m3
1.73
48.8
20
03/03/2319:19
ENM
V30574
Chloromethane
<0.067
pg/m3
0.067
1.03
1
03/06/23 21:15
ENM
V30540
Cyclohexane
<0.161
pg/m3
0.161
3.44
1
03/06/23 21:15
ENM
V30540
1,2-Dibromoethane
<0.151
pg/m3
0.151
3.84
1
03/06/23 21:15
ENM
V30540
1,2-Dichlorobenzene
<0.096
pg/m3
0.096
3.01
1
03/06/23 21:15
ENM
V30540
1,3-Dichlorobenzene
<0.174
p9/m3
0.174
12.0
1
03/06/23 21:15
ENM
V30540
1,4-Dichlorobenzene
<0.186
pg/m3
0.186
3.01
1
03/06/23 21:15
ENM
V30540
Dichlorodifluoromethane 2.82
pg/m3
0.134
2.47
1
03/06/23 21:15
ENM
V30540
1,1-Dichloroethane
<0.101
pg/m3
0.101
2.02
1
03/06/23 21:15
ENM
V30540
1,2-Dichloroethane
<0.129
pg/m3
0.129
2.02
1
03/06/23 21:15
ENM
V30540
Qualifiers/ B
Analyte detected in blank
DF
Dilution Factor
Definitions J
Estimated value
MQL
Method Quantitation Limit
Page 10 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020
REPORT OF ANAL YSIS
Lab No : 90051 Matrix: Air
Sample ID: SSV-4 Sampled: 3/2/2023 13:37
Analytical Method: TO-15 Prep Batch(es): V30S39 03/06/23 09:00 V30S69 03/03/23 09:00
Prep Method: TO-15 Prep
Test Results Units MDL MQL DF Date / Time By Analytical
Analyzed Batch
1,1-Dichloroethene
<0.107
Ng/m3
0.107
1.98
1
03/06/23 21:15
ENM
V30540
cis- 1,2-Dich loroethene
<0.095
ug/m3
0.095
1.98
1
03/06/23 21:15
ENM
V30540
trans-1,2-Dichloroethene
<0.108
Ng/m3
0.108
1.98
1
03/06/23 21:15
ENM
V30540
1,2-Dichloropropane
<0.205
ug/m3
0.205
2.31
1
03/06/23 21:15
ENM
V30540
1,2-Dichlorotetrafluoroethane
<0.622
Ng/m3
0.622
3.50
1
03/06/23 21:15
ENM
V30540
cis- 1,3-Dich loropropene
<0.178
ug/m3
0.178
2.27
1
03/06/23 21:15
ENM
V30540
trans-1,3-Dichloropropene
<0.178
Ng/m3
0.178
2.27
1
03/06/23 21:15
ENM
V30540
1,4-Dioxane
<0.435
ug/m3
0.435
1.80
1
03/06/23 21:15
ENM
V30540
Ethyl Acetate
<0.136
Ng/m3
0.136
1.80
1
03/06/23 21:15
ENM
V30540
Ethylbenzene
0.6813
ug/m3
0.106
2.17
1
03/06/23 21:15
ENM
V30540
4-Ethyltoluene
<0.128
Ng/m3
0.128
2.46
1
03/06/23 21:15
ENM
V30540
1,1,2-Trichloro-1,2,2-trifluoroethane
<0.561
ug/m3
0.561
3.83
1
03/06/23 21:15
ENM
V30540
Heptane
<0.143
Ng/m3
0.143
2.05
1
03/06/23 21:15
ENM
V30540
Hexachlorobutadiene
<0.330
ug/m3
0.330
5.33
1
03/06/23 21:15
ENM
V30540
n-Hexane
0.2923
Ng/m3
0.047
1.76
1
03/06/23 21:15
ENM
V30540
2-Hexanone
0.606 J
ug/m3
0.285
2.05
1
03/06/23 21:15
ENM
V30540
Isopropyl Alcohol
6.28 B
pg/m3
0.139
4.92
1
03/06/23 21:15
ENM
V30540
Methyl Ethyl Ketone (MEK)
7.67
pg/m3
0.224
1.47
1
03/06/23 21:15
ENM
V30540
Methyl tert-butyl ether (MTBE)
<0.033
Ng/m3
0.033
1.80
1
03/06/23 21:15
ENM
V30540
4-Methyl-2-Pentanone
0.6711
ug/m3
0.121
2.05
1
03/06/23 21:15
ENM
V30540
Methylene Chloride
13.4
Ng/m3
0.488
1.74
1
03/06/23 21:15
ENM
V30540
Naphthalene
<0.183
ug/m3
0.183
2.62
1
03/06/23 21:15
ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 11 of 30

WavDdibnto
ANALYTICAL
01102
Hart & Hickman (Charlotte)
Loryn Smith
2923 South Tryon St. Ste 100
Charlotte , NC 28203
Report Number : 23-061-0020
Project BOU-024
Information :
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
REPORT OF ANAL YSIS
Report Date : 03/08/2023
Received : 03/02/2023
Lab No : 90051
Matrix: Air
Sample ID: SSV-4
Sampled:
3/2/2023
13:37
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00 V30569
03/03/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Propene
<0.242
pg/m3
0.242
0.860
1
03/06/23 21:15
ENM
V30540
Styrene
<0.124
pg/m3
0.124
2.13
1
03/06/23 21:15
ENM
V30540
1, 1, 2,2-Tetrach loroetha ne
<0.104
pg/m3
0.104
3.43
1
03/06/23 21:15
ENM
V30540
Tetrachloroethene
<0.181
pg/m3
0.181
3.39
1
03/06/23 21:15
ENM
V30540
Tetrahydrofuran
<0.107
pg/m3
0.107
1.47
1
03/06/23 21:15
ENM
V30540
Toluene
0.7273
pg/m3
0.090
1.88
1
03/06/23 21:15
ENM
V30540
1,2,4-Trichlorobenzene
<0.209
pg/m3
0.209
3.71
1
03/06/23 21:15
ENM
V30540
1, 1, 1 -Trich loroetha ne
<0.144
pg/m3
0.144
2.73
1
03/06/23 21:15
ENM
V30540
1, 1, 2-Trich loroetha ne
<0.087
pg/m3
0.087
2.73
1
03/06/23 21:15
ENM
V30540
Trichloroethene
<0.199
pg/m3
0.199
2.15
1
03/06/23 21:15
ENM
V30540
Trichlorofluoromethane
1.913
pg/m3
0.130
2.81
1
03/06/23 21:15
ENM
V30540
1,2,4-Trimethyl benzene
<0.110
pg/m3
0.110
2.46
1
03/06/23 21:15
ENM
V30540
1,3,5-Trimethyl benzene
<0.236
pg/m3
0.236
2.46
1
03/06/23 21:15
ENM
V30540
Vinyl Acetate
<0.224
pg/m3
0.224
1.76
1
03/06/23 21:15
ENM
V30540
Vinyl Chloride
<0.127
pg/m3
0.127
1.28
1
03/06/23 21:15
ENM
V30540
o-Xylene
1.441
pg/m3
0.157
2.17
1
03/06/23 21:15
ENM
V30540
m,p-Xylene
2.093
pg/m3
0.217
5.65
1
03/06/23 21:15
ENM
V30540
Xylene (Total)
3.53 J
pg/m3
0.157
2.17
1
03/06/23 21:15
V30540
Surrogate: 4-Bromofluorobenzene
100
Limits:
70-130%
1 03/06/23 21:15
ENM
V30540
Surrogate:4-Bromofluorobenzene
99.4
Limits: 70-130%
20 03/03/23 19:19 ENM
V30574
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method
Quantitation Limit
Page 12 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90052
Matrix: Air
Sample ID: SSV-2
Sampled:
3/2/2023 12:44
Analytical Method:
TO-15
Prep Batch(es):
V30S39
03/06/23 09:00
V30S69
03/03/23 09:00
Prep Method:
TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
212
pg/m3
4.04
95.0
20
03/03/2319:56
ENM
V30574
Benzene
0.4123
pg/m3
0.073
1.60
1
03/06/23 22:05
ENM
V30540
Benzyl Chloride
<0.147
pg/m3
0.147
10.4
1
03/06/23 22:05
ENM
V30540
Bromodichloromethane
<0.150
pg/m3
0.150
3.35
1
03/06/23 22:05
ENM
V30540
Bromoform
<0.153
pg/m3
0.153
5.17
1
03/06/23 22:05
ENM
V30540
Bromomethane
<0.115
pg/m3
0.115
1.94
1
03/06/23 22:05
ENM
V30540
1,3-Butadiene
<0.328
pg/m3
0.328
1.11
1
03/06/23 22:05
ENM
V30540
Carbon Disulfide
2.953
pg/m3
0.060
6.23
1
03/06/23 22:05
ENM
V30540
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
03/06/23 22:05
ENM
V30540
Chlorobenzene
<0.107
pg/m3
0.107
2.30
1
03/06/23 22:05
ENM
V30540
Chlorodibromomethane
<0.208
pg/m3
0.208
4.26
1
03/06/23 22:05
ENM
V30540
Chloroethane
<0.164
pg/m3
0.164
1.32
1
03/06/23 22:05
ENM
V30540
Chloroform
0.8643
pg/m3
0.086
2.44
1
03/06/23 22:05
ENM
V30540
Chloromethane
<0.067
pg/m3
0.067
1.03
1
03/06/23 22:05
ENM
V30540
Cyclohexane
<0.161
pg/m3
0.161
3.44
1
03/06/23 22:05
ENM
V30540
1,2-Dibromoethane
<0.151
pg/m3
0.151
3.84
1
03/06/23 22:05
ENM
V30540
1,2-Dichlorobenzene
<0.096
pg/m3
0.096
3.01
1
03/06/23 22:05
ENM
V30540
1,3-Dichlorobenzene
<0.174
pg/m3
0.174
12.0
1
03/06/23 22:05
ENM
V30540
1,4-Dichlorobenzene
<0.186
pg/m3
0.186
3.01
1
03/06/23 22:05
ENM
V30540
Dichlorodifluoromethane 2.86
pg/m3
0.134
2.47
1
03/06/23 22:05
ENM
V30540
1,1-Dichloroethane
<0.101
pg/m3
0.101
2.02
1
03/06/23 22:05
ENM
V30540
1,2-Dichloroethane
<0.129
pg/m3
0.129
2.02
1
03/06/23 22:05
ENM
V30540
Qualifiers/ B
Analyte detected in blank
DF
Dilution Factor
Definitions J
Estimated value
MQL
Method Quantitation Limit
Page 13 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020
REPORT OF ANAL YSIS
Lab No : 90052 Matrix: Air
Sample ID: SSV-2 Sampled: 3/2/2023 12:44
Analytical Method: TO-15 Prep Batch(es): V30539 03/06/23 09:00 V30569 03/03/23 09:00
Prep Method: TO-15 Prep
Test Results Units MDL MQL DF Date / Time By Analytical
Analyzed Batch
1,1-Dichloroethene
<0.107
Ng/m3
0.107
1.98
1
03/06/23 22:05
ENM
V30540
cis- 1,2-Dich loroethene
<0.095
ug/m3
0.095
1.98
1
03/06/23 22:05
ENM
V30540
trans-1,2-Dichloroethene
<0.108
Ng/m3
0.108
1.98
1
03/06/23 22:05
ENM
V30540
1,2-Dichloropropane
<0.205
ug/m3
0.205
2.31
1
03/06/23 22:05
ENM
V30540
1,2-Dichlorotetrafluoroethane
<0.622
Ng/m3
0.622
3.50
1
03/06/23 22:05
ENM
V30540
cis- 1,3-Dich loropropene
<0.178
ug/m3
0.178
2.27
1
03/06/23 22:05
ENM
V30540
trans-1,3-Dichloropropene
<0.178
Ng/m3
0.178
2.27
1
03/06/23 22:05
ENM
V30540
1,4-Dioxane
6.09
pg/m3
0.435
1.80
1
03/06/23 22:05
ENM
V30540
Ethyl Acetate
<0.136
Ng/m3
0.136
1.80
1
03/06/23 22:05
ENM
V30540
Ethylbenzene
<0.106
ug/m3
0.106
2.17
1
03/06/23 22:05
ENM
V30540
4-Ethyltoluene
<0.128
Ng/m3
0.128
2.46
1
03/06/23 22:05
ENM
V30540
1,1,2-Trichloro-1,2,2-trifluoroethane
<0.561
ug/m3
0.561
3.83
1
03/06/23 22:05
ENM
V30540
Heptane
0.3813
Ng/m3
0.143
2.05
1
03/06/23 22:05
ENM
V30540
Hexachlorobutadiene
<0.330
ug/m3
0.330
5.33
1
03/06/23 22:05
ENM
V30540
n-Hexane
0.5213
Ng/m3
0.047
1.76
1
03/06/23 22:05
ENM
V30540
2-Hexanone
<0.285
ug/m3
0.285
2.05
1
03/06/23 22:05
ENM
V30540
Isopropyl Alcohol
9.79 B
pg/m3
0.139
4.92
1
03/06/23 22:05
ENM
V30540
Methyl Ethyl Ketone (MEK)
5.34
ug/m3
0.224
1.47
1
03/06/23 22:05
ENM
V30540
Methyl tert-butyl ether (MTBE)
<0.033
Ng/m3
0.033
1.80
1
03/06/23 22:05
ENM
V30540
4-Methyl-2-Pentanone
1.591
u9/m3
0.121
2.05
1
03/06/23 22:05
ENM
V30540
Methylene Chloride
2.97
Ng/m3
0.488
1.74
1
03/06/23 22:05
ENM
V30540
Naphthalene
1.49 J
ug/m3
0.183
2.62
1
03/06/23 22:05
ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 14 of 30

WavDdibnto
ANALYTICAL
01102
Hart & Hickman (Charlotte)
Loryn Smith
2923 South Tryon St. Ste 100
Charlotte , NC 28203
Report Number : 23-061-0020
Project BOU-024
Information :
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
REPORT OF ANAL YSIS
Report Date : 03/08/2023
Received : 03/02/2023
Lab No : 90052
Matrix: Air
Sample ID: SSV-2
Sampled:
3/2/2023
12:44
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00 V30569
03/03/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Propene
<0.242
pg/m3
0.242
0.860
1
03/06/23 22:05
ENM
V30540
Styrene
<0.124
pg/m3
0.124
2.13
1
03/06/23 22:05
ENM
V30540
1, 1, 2,2-Tetrach loroetha ne
<0.104
pg/m3
0.104
3.43
1
03/06/23 22:05
ENM
V30540
Tetrachloroethene
<0.181
pg/m3
0.181
3.39
1
03/06/23 22:05
ENM
V30540
Tetrahydrofuran
0.4393
pg/m3
0.107
1.47
1
03/06/23 22:05
ENM
V30540
Toluene
1.473
pg/m3
0.090
1.88
1
03/06/23 22:05
ENM
V30540
1,2,4-Trichlorobenzene
<0.209
pg/m3
0.209
3.71
1
03/06/23 22:05
ENM
V30540
1, 1, 1 -Trich loroetha ne
<0.144
pg/m3
0.144
2.73
1
03/06/23 22:05
ENM
V30540
1, 1, 2-Trich loroetha ne
<0.087
pg/m3
0.087
2.73
1
03/06/23 22:05
ENM
V30540
Trichloroethene
<0.199
pg/m3
0.199
2.15
1
03/06/23 22:05
ENM
V30540
Trichlorofluoromethane
1.783
pg/m3
0.130
2.81
1
03/06/23 22:05
ENM
V30540
1,2,4-Trimethyl benzene
1.303
pg/m3
0.110
2.46
1
03/06/23 22:05
ENM
V30540
1,3,5-Trimethyl benzene
0.4273
pg/m3
0.236
2.46
1
03/06/23 22:05
ENM
V30540
Vinyl Acetate
<0.224
pg/m3
0.224
1.76
1
03/06/23 22:05
ENM
V30540
Vinyl Chloride
<0.127
pg/m3
0.127
1.28
1
03/06/23 22:05
ENM
V30540
o-Xylene
0.3563
pg/m3
0.157
2.17
1
03/06/23 22:05
ENM
V30540
m,p-Xylene
0.5733
pg/m3
0.217
5.65
1
03/06/23 22:05
ENM
V30540
Xylene (Total)
0.9293
pg/m3
0.157
2.17
1
03/06/23 22:05
V30540
Surrogate: 4-Bromofluorobenzene
97.8
Limits:
70-130%
1 03/06/23 22:05 ENM
V30540
Surrogate:4-Bromofluorobenzene
94.1
Limits: 70-130%
20 03/03/23 19:56 ENM
V30574
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method
Quantitation Limit
Page 15 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90053
Matrix: Air
Sample ID: SSV-3
Sampled:
3/2/2023 13:09
Analytical Method:
TO-15
Prep Batch(es):
V30S39
03/06/23 09:00
Prep Method:
TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
77.6
pg/m3
0.202
4.75
1
03/06/23 22:58
ENM
V30540
Benzene
0.3963
pg/m3
0.073
1.60
1
03/06/23 22:58
ENM
V30540
Benzyl Chloride
<0.147
pg/m3
0.147
10.4
1
03/06/23 22:58
ENM
V30540
Bromodichloromethane
<0.150
pg/m3
0.150
3.35
1
03/06/23 22:58
ENM
V30540
Bromoform
<0.153
pg/m3
0.153
5.17
1
03/06/23 22:58
ENM
V30540
Bromomethane
<0.115
pg/m3
0.115
1.94
1
03/06/23 22:58
ENM
V30540
1,3-Butadiene
<0.328
pg/m3
0.328
1.11
1
03/06/23 22:58
ENM
V30540
Carbon Disulfide
6.33
pg/m3
0.060
6.23
1
03/06/23 22:58
ENM
V30540
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
03/06/23 22:58
ENM
V30540
Chlorobenzene
<0.107
pg/m3
0.107
2.30
1
03/06/23 22:58
ENM
V30540
Chlorodibromomethane
<0.208
p9/m3
0.208
4.26
1
03/06/23 22:58
ENM
V30540
Chloroethane
<0.164
pg/m3
0.164
1.32
1
03/06/23 22:58
ENM
V30540
Chloroform
0.6683
p9/m3
0.086
2.44
1
03/06/23 22:58
ENM
V30540
Chloromethane
<0.067
pg/m3
0.067
1.03
1
03/06/23 22:58
ENM
V30540
Cyclohexane
<0.161
p9/m3
0.161
3.44
1
03/06/23 22:58
ENM
V30540
1,2-Dibromoethane
<0.151
pg/m3
0.151
3.84
1
03/06/23 22:58
ENM
V30540
1,2-Dichlorobenzene
<0.096
p9/m3
0.096
3.01
1
03/06/23 22:58
ENM
V30540
1,3-Dichlorobenzene
<0.174
pg/m3
0.174
12.0
1
03/06/23 22:58
ENM
V30540
1,4-Dichlorobenzene
<0.186
p9/m3
0.186
3.01
1
03/06/23 22:58
ENM
V30540
Dichlorodifluoromethane 2.86
pg/m3
0.134
2.47
1
03/06/23 22:58
ENM
V30540
1,1-Dichloroethane
<0.101
pg/m3
0.101
2.02
1
03/06/23 22:58
ENM
V30540
1,2-Dichloroethane
<0.129
pg/m3
0.129
2.02
1
03/06/23 22:58
ENM
V30540
Qualifiers/ B
Analyte detected in blank
DF
Dilution Factor
Definitions J
Estimated value
MQL
Method Quantitation Limit
Page 16 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90053
Matrix: Air
Sample ID: SSV-3
Sampled:
3/2/2023 13:09
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
1,1-Dichloroethene
<0.107
Ng/m3
0.107
1.98
1
03/06/23 22:58
ENM
V30540
cis- 1,2-Dich loroethene
<0.095
ug/m3
0.095
1.98
1
03/06/23 22:58
ENM
V30540
trans-1,2-Dichloroethene
<0.108
Ng/m3
0.108
1.98
1
03/06/23 22:58
ENM
V30540
1,2-Dichloropropane
<0.205
ug/m3
0.205
2.31
1
03/06/23 22:58
ENM
V30540
1,2-Dichlorotetrafluoroethane
<0.622
Ng/m3
0.622
3.50
1
03/06/23 22:58
ENM
V30540
cis- 1,3-Dich loropropene
<0.178
ug/m3
0.178
2.27
1
03/06/23 22:58
ENM
V30540
trans-1,3-Dichloropropene
<0.178
Ng/m3
0.178
2.27
1
03/06/23 22:58
ENM
V30540
1,4-Dioxane
0.749 J
ug/m3
0.435
1.80
1
03/06/23 22:58
ENM
V30540
Ethyl Acetate
<0.136
Ng/m3
0.136
1.80
1
03/06/23 22:58
ENM
V30540
Ethylbenzene
<0.106
ug/m3
0.106
2.17
1
03/06/23 22:58
ENM
V30540
4-Ethyltoluene
0.884 J
Ng/m3
0.128
2.46
1
03/06/23 22:58
ENM
V30540
1,1,2-Trichloro-1,2,2-trifluoroethane
<0.561
ug/m3
0.561
3.83
1
03/06/23 22:58
ENM
V30540
Heptane
<0.143
Ng/m3
0.143
2.05
1
03/06/23 22:58
ENM
V30540
Hexachlorobutadiene
<0.330
ug/m3
0.330
5.33
1
03/06/23 22:58
ENM
V30540
n-Hexane
0.451 J
Ng/m3
0.047
1.76
1
03/06/23 22:58
ENM
V30540
2-Hexanone
<0.285
ug/m3
0.285
2.05
1
03/06/23 22:58
ENM
V30540
Isopropyl Alcohol
6.46 B
Ng/m3
0.139
4.92
1
03/06/23 22:58
ENM
V30540
Methyl Ethyl Ketone (MEK)
3.70
ug/m3
0.224
1.47
1
03/06/23 22:58
ENM
V30540
Methyl tert-butyl ether (MTBE)
<0.033
Ng/m3
0.033
1.80
1
03/06/23 22:58
ENM
V30540
4-Methyl-2-Pentanone
0.294 J
u9/m3
0.121
2.05
1
03/06/23 22:58
ENM
V30540
Methylene Chloride
2.67
pg/m3
0.488
1.74
1
03/06/23 22:58
ENM
V30540
Naphthalene
<0.183
ug/m3
0.183
2.62
1
03/06/23 22:58
ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 17 of 30

WavDdibnto
ANALYTICAL
01102
Hart & Hickman (Charlotte)
Loryn Smith
2923 South Tryon St. Ste 100
Charlotte , NC 28203
Report Number : 23-061-0020
Project BOU-024
Information :
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
REPORT OF ANAL YSIS
Report Date : 03/08/2023
Received : 03/02/2023
Lab No : 90053
Matrix: Air
Sample ID: SSV-3
Sampled:
3/2/2023
13:09
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Propene
<0.242
Ng/m3
0.242
0.860
1
03/06/23 22:58
ENM
V30540
Styrene
<0.124
ug/m3
0.124
2.13
1
03/06/23 22:58
ENM
V30540
1, 1, 2,2-Tetrach lo roetha ne
<0.104
Ng/m3
0.104
3.43
1
03/06/23 22:58
ENM
V30540
Tetrachloroethene
<0.181
ug/m3
0.181
3.39
1
03/06/23 22:58
ENM
V30540
Tetrahydrofuran
0.4923
Ng/m3
0.107
1.47
1
03/06/23 22:58
ENM
V30540
Toluene
6.84
ug/m3
0.090
1.88
1
03/06/23 22:58
ENM
V30540
1,2,4-Trichlorobenzene
<0.209
Ng/m3
0.209
3.71
1
03/06/23 22:58
ENM
V30540
1, 1, 1 -Trich loroetha ne
<0.144
ug/m3
0.144
2.73
1
03/06/23 22:58
ENM
V30540
1, 1, 2-Trich loroetha ne
<0.087
Ng/m3
0.087
2.73
1
03/06/23 22:58
ENM
V30540
Trichloroethene
<0.199
ug/m3
0.199
2.15
1
03/06/23 22:58
ENM
V30540
Trichlorofluoromethane
1.903
Ng/m3
0.130
2.81
1
03/06/23 22:58
ENM
V30540
1,2,4-Trimethyl benzene
8.06
ug/m3
0.110
2.46
1
03/06/23 22:58
ENM
V30540
1,3,5-Trimethyl benzene
2.133
Ng/m3
0.236
2.46
1
03/06/23 22:58
ENM
V30540
Vinyl Acetate
<0.224
ug/m3
0.224
1.76
1
03/06/23 22:58
ENM
V30540
Vinyl Chloride
<0.127
Ng/m3
0.127
1.28
1
03/06/23 22:58
ENM
V30540
o-Xylene
0.7513
ug/m3
0.157
2.17
1
03/06/23 22:58
ENM
V30540
m,p-Xylene
0.8293
Ng/m3
0.217
5.65
1
03/06/23 22:58
ENM
V30540
Xylene (Total)
1.583
ug/m3
0.157
2.17
1
03/06/23 22:58
V30540
Surrogate: 4-Bromofluorobenzene
98.6
Limits:
70-130%
1 03/06/23 22:58 ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 18 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90054
Matrix: Air
Sample ID: SSV-1
Sampled:
3/2/2023 12:14
Analytical Method:
TO-15
Prep Batch(es):
V30S39
03/06/23 09:00
Prep Method:
TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Acetone
43.7
pg/m3
0.202
4.75
1
03/06/23 23:50
ENM
V30540
Benzene
0.8303
pg/m3
0.073
1.60
1
03/06/23 23:50
ENM
V30540
Benzyl Chloride
<0.147
pg/m3
0.147
10.4
1
03/06/23 23:50
ENM
V30540
Bromodichloromethane
<0.150
pg/m3
0.150
3.35
1
03/06/23 23:50
ENM
V30540
Bromoform
<0.153
pg/m3
0.153
5.17
1
03/06/23 23:50
ENM
V30540
Bromomethane
<0.115
pg/m3
0.115
1.94
1
03/06/23 23:50
ENM
V30540
1,3-Butadiene
<0.328
pg/m3
0.328
1.11
1
03/06/23 23:50
ENM
V30540
Carbon Disulfide
1.35 J
pg/m3
0.060
6.23
1
03/06/23 23:50
ENM
V30540
Carbon Tetrachloride
<0.155
pg/m3
0.155
3.15
1
03/06/23 23:50
ENM
V30540
Chlorobenzene
<0.107
pg/m3
0.107
2.30
1
03/06/23 23:50
ENM
V30540
Chlorodibromomethane
<0.208
pg/m3
0.208
4.26
1
03/06/23 23:50
ENM
V30540
Chloroethane
<0.164
pg/m3
0.164
1.32
1
03/06/23 23:50
ENM
V30540
Chloroform
<0.086
pg/m3
0.086
2.44
1
03/06/23 23:50
ENM
V30540
Chloromethane
<0.067
pg/m3
0.067
1.03
1
03/06/23 23:50
ENM
V30540
Cyclohexane
<0.161
pg/m3
0.161
3.44
1
03/06/23 23:50
ENM
V30540
1,2-Dibromoethane
<0.151
pg/m3
0.151
3.84
1
03/06/23 23:50
ENM
V30540
1,2-Dichlorobenzene
<0.096
pg/m3
0.096
3.01
1
03/06/23 23:50
ENM
V30540
1,3-Dichlorobenzene
<0.174
pg/m3
0.174
12.0
1
03/06/23 23:50
ENM
V30540
1,4-Dichlorobenzene
<0.186
pg/m3
0.186
3.01
1
03/06/23 23:50
ENM
V30540
Dichlorodifluoromethane 2.79
pg/m3
0.134
2.47
1
03/06/23 23:50
ENM
V30540
1,1-Dichloroethane
<0.101
pg/m3
0.101
2.02
1
03/06/23 23:50
ENM
V30540
1,2-Dichloroethane
<0.129
pg/m3
0.129
2.02
1
03/06/23 23:50
ENM
V30540
Qualifiers/ B
Analyte detected in blank
DF
Dilution Factor
Definitions J
Estimated value
MQL
Method Quantitation Limit
Page 19 of 30

Waypoint, 0 449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
ANALYTICAL www.waypointanalytical.com
01102
Hart & Hickman (Charlotte) Project BOU-024
Loryn Smith Report Date : 03/08/2023
2923 South Tryon St. Ste 100 Information : Received : 03/02/2023
Charlotte , NC 28203
Report Number : 23-061-0020 REPOR T OF A NA L YSIS
Lab No : 90054
Matrix: Air
Sample ID: SSV-1
Sampled:
3/2/2023 12:14
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
1,1-Dichloroethene
<0.107
pg/m3
0.107
1.98
1
03/06/23 23:50
ENM
V30540
cis- 1,2-Dich loroethene
<0.095
pg/m3
0.095
1.98
1
03/06/23 23:50
ENM
V30540
trans-1,2-Dichloroethene
<0.108
pg/m3
0.108
1.98
1
03/06/23 23:50
ENM
V30540
1,2-Dichloropropane
<0.205
pg/m3
0.205
2.31
1
03/06/23 23:50
ENM
V30540
1,2-Dichlorotetrafluoroethane
<0.622
pg/m3
0.622
3.50
1
03/06/23 23:50
ENM
V30540
cis- 1,3-Dich loropropene
<0.178
pg/m3
0.178
2.27
1
03/06/23 23:50
ENM
V30540
trans-1,3-Dichloropropene
<0.178
pg/m3
0.178
2.27
1
03/06/23 23:50
ENM
V30540
1,4-Dioxane
<0.435
pg/m3
0.435
1.80
1
03/06/23 23:50
ENM
V30540
Ethyl Acetate
0.3923
pg/m3
0.136
1.80
1
03/06/23 23:50
ENM
V30540
Ethylbenzene
0.334 J
pg/m3
0.106
2.17
1
03/06/23 23:50
ENM
V30540
4-Ethyltoluene
<0.128
pg/m3
0.128
2.46
1
03/06/23 23:50
ENM
V30540
1,1,2-Trichloro-1,2,2-trifluoroethane
0.605 J
pg/m3
0.561
3.83
1
03/06/23 23:50
ENM
V30540
Heptane
1.503
pg/m3
0.143
2.05
1
03/06/23 23:50
ENM
V30540
Hexachlorobutadiene
<0.330
pg/m3
0.330
5.33
1
03/06/23 23:50
ENM
V30540
n-Hexane
1.593
pg/m3
0.047
1.76
1
03/06/23 23:50
ENM
V30540
2-Hexanone
0.696 J
pg/m3
0.285
2.05
1
03/06/23 23:50
ENM
V30540
Isopropyl Alcohol
6.91 B
pg/m3
0.139
4.92
1
03/06/23 23:50
ENM
V30540
Methyl Ethyl Ketone (MEK)
12.5
pg/m3
0.224
1.47
1
03/06/23 23:50
ENM
V30540
Methyl tert-butyl ether (MTBE)
<0.033
pg/m3
0.033
1.80
1
03/06/23 23:50
ENM
V30540
4-Methyl-2-Pentanone
2.57
pg/m3
0.121
2.05
1
03/06/23 23:50
ENM
V30540
Methylene Chloride
4.19
pg/m3
0.488
1.74
1
03/06/23 23:50
ENM
V30540
Naphthalene
1.343
pg/m3
0.183
2.62
1
03/06/23 23:50
ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 20 of 30

WavDdibnto
ANALYTICAL
01102
Hart & Hickman (Charlotte)
Loryn Smith
2923 South Tryon St. Ste 100
Charlotte , NC 28203
Report Number : 23-061-0020
Project BOU-024
Information :
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointana lyti ca Isom
REPORT OF ANAL YSIS
Report Date : 03/08/2023
Received : 03/02/2023
Lab No : 90054
Matrix: Air
Sample ID: SSV-1
Sampled:
3/2/2023
12:14
Analytical Method: TO-15
Prep Batch(es):
V30539
03/06/23 09:00
Prep Method: TO-15 Prep
Test
Results
Units
MDL
MQL
DF
Date / Time
By
Analytical
Analyzed
Batch
Propene
4.28
pg/m3
0.242
0.860
1
03/06/23 23:50
ENM
V30540
Styrene
<0.124
ug/m3
0.124
2.13
1
03/06/23 23:50
ENM
V30540
1, 1, 2,2-Tetrach lo roetha ne
<0.104
Ng/m3
0.104
3.43
1
03/06/23 23:50
ENM
V30540
Tetrachloroethene
6.12
ug/m3
0.181
3.39
1
03/06/23 23:50
ENM
V30540
Tetrahydrofuran
0.4923
Ng/m3
0.107
1.47
1
03/06/23 23:50
ENM
V30540
Toluene
1.89
ug/m3
0.090
1.88
1
03/06/23 23:50
ENM
V30540
1,2,4-Trichlorobenzene
<0.209
Ng/m3
0.209
3.71
1
03/06/23 23:50
ENM
V30540
1, 1, 1 -Trich loroetha ne
<0.144
ug/m3
0.144
2.73
1
03/06/23 23:50
ENM
V30540
1, 1, 2-Trich loroetha ne
<0.087
Ng/m3
0.087
2.73
1
03/06/23 23:50
ENM
V30540
Trichloroethene
<0.199
ug/m3
0.199
2.15
1
03/06/23 23:50
ENM
V30540
Trichlorofluoromethane
1.973
pg/m3
0.130
2.81
1
03/06/23 23:50
ENM
V30540
1,2,4-Trimethyl benzene
2.063
ug/m3
0.110
2.46
1
03/06/23 23:50
ENM
V30540
1,3,5-Trimethyl benzene
0.4663
Ng/m3
0.236
2.46
1
03/06/23 23:50
ENM
V30540
Vinyl Acetate
<0.224
ug/m3
0.224
1.76
1
03/06/23 23:50
ENM
V30540
Vinyl Chloride
<0.127
Ng/m3
0.127
1.28
1
03/06/23 23:50
ENM
V30540
o-Xylene
0.5213
ug/m3
0.157
2.17
1
03/06/23 23:50
ENM
V30540
m,p-Xylene
0.8513
Ng/m3
0.217
5.65
1
03/06/23 23:50
ENM
V30540
Xylene (Total)
1.373
ug/m3
0.157
2.17
1
03/06/23 23:50
V30540
Surrogate: 4-Bromofluorobenzene
98.6
Limits:
70-130%
1 03/06/23 23:50 ENM
V30540
Qualifiers/ B Analyte detected in blank
DF
Dilution Factor
Definitions J Estimated value
MQL
Method Quantitation Limit
Page 21 of 30

Waypointo
ANALYTICAL
Client ID: Hart & Hickman (Charlotte)
Project Description: BOU-024
Report No: 23-061-0020
QC Prep: V30539
QC Prep Batch Method: TO-15 Prep
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Lab Reagent Blank LRB-V30539
Associated Lab Samples: 90050, 90051, 90052, 90053, 90054
QC Analytical Batch(es): V30540
Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Matrix: AIR
Blank MDL MQL Analyzed % % Rec
Parameter Units Result Recovery Limits
Acetone
pg/m3
<0.202
0.202
4.75
03/06/23 11:09
Benzene
pg/m3
<0.073
0.073
1.60
03/06/23 11:09
Benzyl Chloride
pg/m3
<0.147
0.147
10.4
03/06/23 11:09
Bromodichloromethane
pg/m3
<0.150
0.150
3.35
03/06/23 11:09
Bromoform
pg/m3
<0.153
0.153
5.17
03/06/23 11:09
Bromomethane
pg/m3
<0.115
0.115
1.94
03/06/23 11:09
1,3-Butadiene
pg/m3
<0.328
0.328
1.11
03/06/23 11:09
Carbon Disulfide
pg/m3
<0.060
0.060
6.23
03/06/23 11:09
Carbon Tetrachloride
pg/m3
<0.155
0.155
3.15
03/06/23 11:09
Chlorobenzene
pg/m3
<0.107
0.107
2.30
03/06/23 11:09
Chlorodibromomethane
pg/m3
<0.208
0.208
4.26
03/06/23 11:09
Chloroethane
pg/m3
<0.164
0.164
1.32
03/06/23 11:09
Chloroform
pg/m3
<0.086
0.086
2.44
03/06/23 11:09
Chloromethane
pg/m3
<0.067
0.067
1.03
03/06/23 11:09
Cyclohexane
pg/m3
<0.161
0.161
3.44
03/06/23 11:09
1,2-Dibromoethane
pg/m3
<0.151
0.151
3.84
03/06/23 11:09
1,2-Dichlorobenzene
pg/m3
<0.096
0.096
3.01
03/06/23 11:09
1,3-Dichlorobenzene
pg/m3
<0.174
0.174
12.0
03/06/23 11:09
1,4-Dichlorobenzene
pg/m3
<0.186
0.186
3.01
03/06/23 11:09
Dichlorodifluoromethane
pg/m3
<0.134
0.134
2.47
03/06/23 11:09
1,1-Dichloroethane
pg/m3
<0.101
0.101
2.02
03/06/23 11:09
1,2-Dichloroethane
pg/m3
<0.129
0.129
2.02
03/06/23 11:09
1,1-Dichloroethene
pg/m3
<0.107
0.107
1.98
03/06/23 11:09
cis- 1,2-Dichloroethene
pg/m3
<0.095
0.095
1.98
03/06/23 11:09
trans-1,2-Dichloroethene
pg/m3
<0.108
0.108
1.98
03/06/23 11:09
1,2-Dichloropropane
pg/m3
<0.205
0.205
2.31
03/06/23 11:09
1,2-Dichlorotetrafluoroethane
pg/m3
<0.622
0.622
3.50
03/06/23 11:09
Date:
03/08/2023 02:00 PM
Page 1 of 6
Page 22 of 30

Waypointo
ANALYTICAL
Client ID: Hart & Hickman (Charlotte)
Project Description: BOU-024
Report No: 23-061-0020
QC Prep: V30539
QC Prep Batch Method: TO-15 Prep
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Lab Reagent Blank LRB-V30539
Associated Lab Samples: 90050, 90051, 90052, 90053, 90054
QC Analytical Batch(es): V30540
Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Matrix: AIR
Blank MDL MQL Analyzed % % Rec
Parameter Units Result Recovery Limits
cis-1,3-Dichloropropene
pg/m3
<0.178
0.178
2.27
03/06/23 11:09
trans-1,3-Dichloropropene
pg/m3
<0.178
0.178
2.27
03/06/23 11:09
1,4-Dioxane
pg/m3
<0.435
0.435
1.80
03/06/23 11:09
Ethyl Acetate
pg/m3
<0.136
0.136
1.80
03/06/23 11:09
Ethylbenzene
pg/m3
<0.106
0.106
2.17
03/06/23 11:09
4-Ethyltoluene
pg/m3
<0.128
0.128
2.46
03/06/23 11:09
1,1,2-Trichloro-1,2,2-trifluoroethane
pg/m3
<0.561
0.561
3.83
03/06/23 11:09
Heptane
pg/m3
<0.143
0.143
2.05
03/06/23 11:09
Hexachlorobutadiene
pg/m3
<0.330
0.330
5.33
03/06/23 11:09
n-Hexane
pg/m3
<0.047
0.047
1.76
03/06/23 11:09
2-Hexanone
pg/m3
<0.285
0.285
2.05
03/06/23 11:09
Isopropyl Alcohol
pg/m3
1.16
0.139
4.92
03/06/23 11:09
Methyl Ethyl Ketone (MEK)
pg/m3
<0.224
0.224
1.47
03/06/23 11:09
Methyl tert-butyl ether (MTBE)
pg/m3
<0.033
0.033
1.80
03/06/23 11:09
4-Methyl-2-Pentanone
pg/m3
<0.121
0.121
2.05
03/06/23 11:09
Methylene Chloride
pg/m3
<0.488
0.488
1.74
03/06/23 11:09
Naphthalene
pg/m3
<0.183
0.183
2.62
03/06/23 11:09
Propene
pg/m3
<0.242
0.242
0.860
03/06/23 11:09
Styrene
pg/m3
<0.124
0.124
2.13
03/06/23 11:09
1,1,2,2-Tetrachloroethane
pg/m3
<0.104
0.104
3.43
03/06/23 11:09
Tetrachloroethene
pg/m3
<0.181
0.181
3.39
03/06/23 11:09
Tetrahydrofuran
pg/m3
<0.107
0.107
1.47
03/06/23 11:09
Toluene
pg/m3
<0.090
0.090
1.88
03/06/23 11:09
1,2,4-Trichlorobenzene
pg/m3
<0.209
0.209
3.71
03/06/23 11:09
1,1,1-Trichloroethane
pg/m3
<0.144
0.144
2.73
03/06/23 11:09
1,1,2-Trichloroethane
pg/m3
<0.087
0.087
2.73
03/06/23 11:09
Trichloroethene
pg/m3
<0.199
0.199
2.15
03/06/23 11:09
Date:
03/08/2023 02:00 PM
Page 2 of 6
Page 23 of 30

Waypointo
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Client ID:
Hart & Hickman (Charlotte)
Project Description:
BOU-024
Report No:
23-061-0020
QC Prep:
V30539
QC Analytical Batch(es): V30540
QC Prep Batch Method:
TO-15 Prep
Analysis Method:
TO-15
Analysis Description:
Volatile Organic
Compounds in Air- GC/MS
Lab Reagent Blank
LRB-V30539
Matrix: AIR
Associated Lab Samples:
90050, 90051, 90052, 90053, 90054
Blank MDL
MQL
Analyzed
% % Rec
Parameter
Units
Result
Recovery Limits
Trichlorofluoromethane
pg/m3
<0.130 0.130
2.81
03/06/23 11:09
1,2,4-Trimethyl benzene
pg/m3
<0.110 0.110
2.46
03/06/23 11:09
1,3,5-Trimethyl benzene
pg/m3
<0.236 0.236
2.46
03/06/23 11:09
Vinyl Acetate
pg/m3
<0.224 0.224
1.76
03/06/23 11:09
Vinyl Chloride
pg/m3
<0.127 0.127
1.28
03/06/23 11:09
o-Xylene
pg/m3
<0.157 0.157
2.17
03/06/23 11:09
m,p-Xylene
pg/m3
<0.217 0.217
5.65
03/06/23 11:09
4-Bromofluorobenzene (S)
03/06/23 11:09
91.0 70-130
Laboratory Control Sample
LCS-V30539
Spike
LCS
LCS %Rec
% Rec
Parameter
Units
Conc.
Result
Limits
Acetone
pg/m3
11.9
10.5
88.2
70-130
Benzene
pg/m3
16.0
15.6
97.5
70-130
Benzyl Chloride
pg/m3
25.9
27.6
107
70-130
Bromodichloromethane
pg/m3
33.5
32.5
97.0
70-130
Bromoform
pg/m3
51.7
50.5
97.6
70-130
Bromomethane
pg/m3
19.4
20.2
104
70-130
1,3-Butadiene
pg/m3
11.1
11.4
103
70-130
Carbon Disulfide
pg/m3
15.6
16.7
107
70-130
Carbon Tetrachloride
pg/m3
31.5
31.0
98.4
70-130
Chlorobenzene
pg/m3
23.0
23.0
100
70-130
Chlorodibromomethane
pg/m3
42.6
42.2
99.0
70-130
Chloroethane
pg/m3
13.2
13.3
101
70-130
Chloroform
pg/m3
24.4
24.1
98.7
70-130
Chloromethane
pg/m3
10.3
10.6
103
70-130
Cyclohexane
pg/m3
17.2
12.6
73.2
70-130
Date: 03/08/2023 02:00 PM Page 3 of 6
Page 24 of 30

Waypointo
ANALYTICAL
Client ID:
Project Description:
Report No:
Hart & Hickman (Charlotte)
BOU-024
23-061-0020
QC Prep: V30539
QC Prep Batch Method: TO-15 Prep
Laboratory Control Sample
Parameter
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
QC Analytical Batch(es): V30540
Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
LCS-V30539
Spike LCS LCS %Rec % Rec
Units Conc. Result Limits
1,2-Dibromoethane
pg/m3
38.4
39.0
102
70-130
1,2-Dichlorobenzene
pg/m3
30.1
33.2
110
70-130
1,3-Dichlorobenzene
pg/m3
30.1
32.1
107
70-130
1,4-Dichlorobenzene
pg/m3
30.1
32.9
109
70-130
Dichlorodifluoromethane
pg/m3
24.7
25.5
103
70-130
1,1-Dichloroethane
pg/m3
20.2
21.6
107
70-130
1,2-Dichloroethane
pg/m3
20.2
20.0
99.0
70-130
1,1-Dichloroethene
pg/m3
19.8
21.2
107
70-130
cis-1,2-Dichloroethene
pg/m3
19.8
21.2
107
70-130
trans-1,2-Dichloroethene
pg/m3
19.8
21.2
107
70-130
1,2-Dichloropropane
pg/m3
23.1
21.8
94.3
70-130
1,2-Dichlorotetrafluoroethane
pg/m3
35.0
36.0
103
70-130
cis-1,3-Dichloropropene
pg/m3
22.7
22.3
98.2
70-130
trans-1,3-Dichloropropene
pg/m3
22.7
22.3
98.2
70-130
1,4-Dioxane
pg/m3
18.0
17.3
96.1
70-130
Ethyl Acetate
pg/m3
18.0
17.8
98.8
70-130
Ethylbenzene
pg/m3
21.7
22.0
101
70-130
4-Ethyltoluene
pg/m3
24.6
25.5
104
70-130
1,1,2-Trichloro-1,2,2-trifluoroethane
pg/m3
38.3
40.2
105
70-130
Heptane
pg/m3
20.5
20.6
100
70-130
Hexachlorobutadiene
pg/m3
53.3
54.0
101
70-130
n-Hexane
pg/m3
17.6
18.9
107
70-130
2-Hexanone
pg/m3
20.5
21.1
103
70-130
Isopropyl Alcohol
pg/m3
12.3
12.9
105
70-130
Methyl Ethyl Ketone (MEK)
pg/m3
14.8
15.3
103
70-130
Methyl tert-butyl ether (MTBE)
pg/m3
18.0
18.6
103
70-130
4-Methyl-2-Pentanone
pg/m3
20.5
20.3
99.0
70-130
Date: 03/08/2023 02:00 PM Page 4 of 6
Page 25 of 30

Waypointo
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Client ID: Hart & Hickman (Charlotte)
Project Description: BOU-024
Report No: 23-061-0020
QC Prep: V30539 QC Analytical Batch(es): V30540
QC Prep Batch Method: TO-15 Prep Analysis Method: TO-15
Analysis Description: Volatile Organic Compounds in Air- GC/MS
Laboratory Control Sample LCS-V30539
Parameter
Units
Spike
Conc.
LCS
Result
LCS %Rec
% Rec
Limits
Methylene Chloride
pg/m3
17.4
16.8
96.5
70-130
Naphthalene
pg/m3
26.2
26.4
101
70-130
Propene
pg/m3
8.61
8.70
101
70-130
Styrene
pg/m3
21.3
21.3
100
70-130
1,1,2,2-Tetrachloroethane
pg/m3
34.3
34.1
99.4
70-130
Tetrachloroethene
pg/m3
33.9
32.8
96.7
70-130
Tetrahydrofuran
pg/m3
14.7
14.7
100
70-130
Toluene
pg/m3
18.8
18.3
97.3
70-130
1,2,4-Trichlorobenzene
pg/m3
37.1
37.0
99.7
70-130
1,1,1-Trichloroethane
pg/m3
27.3
26.6
97.4
70-130
1,1,2-Trichloroethane
pg/m3
27.3
27.0
98.9
70-130
Trichloroethene
pg/m3
26.9
26.1
97.0
70-130
Trichlorofluoromethane
pg/m3
28.1
29.7
106
70-130
1,2,4-Trimethyl benzene
pg/m3
24.6
26.2
107
70-130
1,3,5-Trimethyl benzene
pg/m3
24.6
26.3
107
70-130
Vinyl Acetate
pg/m3
17.6
18.6
106
70-130
Vinyl Chloride
pg/m3
12.8
13.0
102
70-130
o-Xylene
pg/m3
21.7
22.6
104
70-130
m,p-Xylene
pg/m3
43.4
35.7
82.2
70-130
4-Bromofluorobenzene (S)
99.1
70-130
Date: 03/08/2023 02:00 PM Page 5 of 6
Page 26 of 30

Waypointo
ANALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.waypointanalytical.com
Quality Control Data
Client ID:
Hart & Hickman (Charlotte)
Project Description:
BOU-024
Report No:
23-061-0020
QC Prep:
V30569
QC Analytical Batch(es): V30574
QC Prep Batch Method:
TO-15 Prep
Analysis Method:
TO-15
Analysis Description:
Volatile Organic
Compounds in Air- GC/MS
Lab Reagent Blank
LRB-V30569
Matrix: AIR
Associated Lab Samples:
90050, 90051, 90052
Blank MDL
MQL
Analyzed
% % Rec
Parameter
Units
Result
Recovery Limits
Acetone
pg/m3
0.534 0.202
4.75
03/03/23 14:21
Chloroform
pg/m3
<0.086 0.086
2.44
03/03/23 14:21
4-Bromofluorobenzene (S)
03/03/23 14:21
92.7 70-130
Laboratory Control Sample
LCS-V30569
Spike
LCS
LCS %Rec
% Rec
Parameter
Units
Conc.
Result
Limits
Acetone
pg/m3
11.9
9.88
83.0
70-130
Chloroform
pg/m3
24.4
24.7
101
70-130
4-Bromofluorobenzene (S)
99.7
70-130
Date: 03/08/2023 02:00 PM Page 6 of 6
Page 27 of 30

WayPAo0nt..
NALYTICAL
449 Springbrook Rd, Charlotte, NC 28217
Main 704.529.6364
www.wa y p of n to na lyti ca I.c om
Shipment Receipt Form
Customer Number: 01102
Customer Name: Hart & Hickman (Charlotte)
Report Number: 23-061-0020
Shipping Method
0 Fed Ex 0 US Postal 0 Lab 0 Other:
0 UPS 0 Client 0 Courier Thermometer ID: N/A
Shipping container/cooler uncompromised?
0 Yes
0 No
Number of coolers/boxes received
Custody seals intact on shipping container/cooler?
0 Yes
0 No
Not Present
Custody seals intact on sample bottles?
0 Yes
0 No
Not Present
Chain of Custody (COC) present?
* Yes
0 No
COC agrees with sample label(s)?
0 Yes
0 No
COC properly completed
Yes
0 No
Samples in proper containers?
Yes
0 No
Sample containers intact?
0 Yes
0 No
Sufficient sample volume for indicated test(s)?
Yes
0 No
All samples received within holding time?
Yes
0 No
Cooler temperature in compliance?
0 Yes
0 No
Cooler/Samples arrived at the laboratory on ice.
Samples were considered acceptable as cooling
process had begun.
Yes
0 No
Water - Sample containers properly preserved
0 Yes
0 No
N/A
Water - VOA vials free of headspace
0 Yes
0 No
N/A
Trip Blanks received with VOAs
0 Yes
0 No
N/A
Soil VOA method 5035 — compliance criteria met
0 Yes
0 No
0 N/A
F High concentration container (48 hr) F_ Low concentration EnCore samplers (48 hr)
F_ High concentration pre -weighed (methanol -14 d) Low conc pre -weighed vials (Sod Bis -14 d)
Special precautions or instructions included?
0 Yes
0 No
Comments
Signature: Angelo Norvell Date & Time: F03/02/2023 14:13:17
Page 28 of 30

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Page 30 of 30

Appendix B
Field Sampling Forms

Form ST-1
Summa Canister Shut-in Test Field Form
Project No.: BOU-024 Sampler: DJH
Summa Pressure Check
Shut-in Test
Shut-in Retest (if needed)
Sample ID
Date
Initial
Pressure
Pass?
( > 25.0 " Hg)
Test Peiod
Time
Canister
Pressure
Pass?
Regulator
"Zero"
Pressure
Time
Canister
Pressure
Pass?
Notes
mm/dd/yy
" Hg
Yes/No
24-hr
" Hg
Yes/No
" Hg
24-hr
" Hg
Yes/No
c: 11357
R: 13116
3/2/23
-31
Yes
Start
1106
-31
Yes
-1
Middle
End
1111
-30
c: 15647
R: 6569
3/2/23
-29
Yes
Start
1106
-29
Yes
0
Middle
End
1111
-28.5
c 11372
R: 13109
3/2/23
-29.5
Yes
start
1107
-29.5
Yes
0
Middle
End
1112
-29
c: 13693/11366
R: 13114
3/2/23
-30
Yes
Start
1114
-30
Yes
0
Middle
End
1119
-30
c
R:
Start
Middle
End
c
R:
Start
Middle
End
C = canister ID; R = regulator ID, " Hg = inches of mercury
hard '� hickman
SMARTER ENVIRONMENTAL SOLUTIONS
Last updated:6/18/2020
Notes: Shut -In Test should be performed with matching canister with regulator as listed by laboratory on canister tag, and should last for a duration of at least 5 minutes.
Regulator "Zero" Pressure = pressure of regulator detached from Summa (if not 0 " Hg, then this needs to be accounted for during sampling).
Summa Initial Pressure = pressure of Summa immedietely after closing valve (pressure likely to decrease slighlty once valve is closed).
C:\Users\mvawter\DrapbaK\y0iber\Farm EE \IAQ-SV\Vapar Sampling Farms V6.0
Sub -Slab / Soil Gas Sampling Shut-in Test Field Form
Hart & Hickman, PC

Form SV-1
Sub -Slab / Soil Gas Vapor Installation Field Form
Project No.: BOU-024 Sampler: DJH/JSH Weather:
66 F, clou
Vapor Monitoring Point Construction
Helium Leak Test
Surface
Slab
Material Below
Depth of
Ambient
Volume
Shroud
Purge
Leak Test
Sample ID
Type
Material
Thickness (if
Slab
Screen
Type
Date & Time
Temp.
Purge Method
Purged
Helium
Helium Conic.
Pass?
appl.)
(if appl.)
(if appl.)
Conic.
(see note)
SS, SG
Perm.,
soil,
Concrete soil
Inches
Gravel, sand,
ft bgs
Full sample train or
mm/dd/yy
° F
Syringe, pump
Liters
(see notes
%
% or ppm
(indicate units
Yes / No
Temp.
gravel, as
clay, etc.
point -only
24-hr
for talc.)
below
S SSV-1
c: 15647
SS
Temp.
ConcretE
4
Soil
N/A
Full
3/2/23 1
66
Syringe
0.1
11.0
0 ppm
Yes
R: 6569
S: SSV-2
c: 11357
SS
Temp.
ConcretE
4
Soil
N/A
Full
3/2/23 1
66
Syringe
0.1
11.0
0 ppm
Yes
R: 13116
S: SSV-3
c: 11372
SS
Temp.
ConcretE
4
Soil
N/A
Full
3/2/23 1
67
Syringe
0.1
10.9
0 ppm
Yes
R: 13109
S SSV-4/SSV-DU
c: 11366/13693
SS
Temp.
ConcretE
4
Soil
N/A
Full
3/2/23
67
Syringe
0.1
11.4
0 ppm
Yes
R: 13114
S:
c:
R:
S:
c:
R:
S = sample ID; C = canister lU; K = regulator IU; 65 = sub -slab; S(-i = soil gas; Perm = permanent; I emp = temporary;
" Hg = inches of mercury; ppm = parts per million
Volume Purged = x3 purge volumes = :t"L'a Last updated: 6/18/2020
L = length of tubing/pipe (ft)
a = 0.163 for 2" diameter (L/ft)
= 0.010 for 0.25" diameter (L/ft)
Note: Leak Test Requirements Notes:
Mart hickman Per NC DEQ DWM Vapor Intrusion Guidance, leak test passes if helium
concentration in purge air is less than 10% of helium concentration in
SMARTER ENVIRO?4MENTAL SOLUTIONS shroud.
Sub -Slab / Soil Gas Sampling Vapor Installation Field Form
c\U,e,,\..tw ,\o,°pb°.wome,\F°,m EdtAIAn-ssvwep°, Sampling Fd, V6.0 Hart & Hickman, PC

Form SV-2
Sub -Slab / Soil Gas Vapor Sampling Field Form
Project No.: BOU-024
Sampler: DJH/JSH Weather:
60s, cloudy
Sampling Information
Outdoor Parameters
Indoor Parameters
Sam le ID
p
Date
Proposed
Sampling
Duration
Sampling
Period
Time
Canister
Pressure
Outdoor
Temperature
Outdoor
Humidity
Indoor
Temperature
Indoor
Humidity
mm/dd/yy
Minutes
24-hr
" Hg
of
%
of
%
S: SSV-1
Size: 1.4 L
c: 15647
3/2/23
10
Beginning
1214
-28
66
79
66
79
Middle
1219
-18
R: 6569 Flow Rate: 100 mL/m
End
1226
-5
S: SSV-2 Size: 1.4 L
c: 11357
3/2/23
10
Beginning
1244
-28
67
77
67
77
Middle
1249
-20
R: 13116 Flow Rate: 100 ML/n1
End
1256
-6
S: SSV-3 Size: 1.4 L
Beginning
1309
-28
Middle
1314
-20
c: 11372
3/2/23
10
66
79
66
79
R: 13109 Flow Rate: 100 mL/m
End
1321
-5
S: SSV-4/SSV-DUP Size: 1.4 L
Beginning
1337
-27
Middle
1342
-20
c: 11366/13693
3/2/23
10
66
78
66
78
R: 13114 Flow Rate: 100 ML/m
End
1349
-5
S:
Beginning
Size:
Middle
c:
R: Flow Rate:
End
S:
Beginning
Size:
Middle
c:
R: Flow Rate:
End
5 = sample lu; U = canister lu; K = regulator lu; 55 = sub -slab; 5t3 = sou gas; Perm = permanent; l emp = temporary
" Hg = inches of mercury
hart '� hickman
SMARTER ENVIRONMENTAL. 50LUTION5
Note:
Per NC DEQ DWM Vapor Intrusion Guidance,
shut-in test and helium leak check must be
passed before sampling.
Notes:
Last updated: 6/18/2020
Sub -Slab / Soil Gas Sampling Vapor Sampling Field Form
C:\Users\m,awt,,\Dropbox\yOth,r\Form Edits\IAQ-SSV\Vapor Sampling Forms_V6.0 Hart & Hickman, PC

Appendix C
DEQ Risk Calculators (January 2023)

North Carolina Department of Environmental Quality
Risk Calculator
Version Date:
January 2023
Basis:
November 2022 EPA RSL Table
Site Name:
Former Service Distributing Co.
Site Address:
S. Tryon Street and Orchard Circle
DEQ Section:
Division of Waste Management - Brownfields Program
Site ID:
Exposure Unit ID:
Sub -Slab Soil Gas - Hypothetical Worst Case
Submittal Date:
Prepared By:
Loryn Smith
Reviewed By:
Ralph McGee, PG
North Carolina DEQ Risk Calculator

Table of Contents
1
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID:
Exposure Unit ID:
Sub -Slab Soil Gas - Hypothetical Worst Case
Form No.
Description
Check box
if included
DATA INPUT SHEETS
Input Section 1 - Exposure Pathways & Parameters
Input Form IA
Complete Exposure Pathways
0
Input Form 1B
Exposure Factors and Target Risks
❑
Input Form I
Contaminant Migration Parameters
❑
Input Form 11)
Sample Statistics
❑
Input Section 2 - Exposure Point Concentrations
Input Form 2A
Soil Exposure Point Concentration Table
❑
Input Form 2B
Groundwater Exposure Point Concentration Table
❑
Input Form 2C
Surface Water Exposure Point Concentration Table
❑
Input Form 21)
Soil Gas Exposure Point Concentration Table
0
In ut Form 2E
Indoor Air Exposure Point Concentration Table
❑
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Form lA
Risk for Individual Pathways
0
Output Form 1B
Sitewide Risk
❑
Output Section 2 - Direct Contact Soil and Groundwater Calculators
Output Form 2A
Resident Soil
❑
Output Form 2B
Resident Groundwater Use
❑
Output Form 2C
Non -Residential Worker Soil
❑
Output Form 2D
Non -Residential Worker Groundwater Use
❑
Output Form 2E
Construction Worker Soil
❑
Output Form 2F
Recreator/Trespasser Soil
❑
Output Form 2G
Recreator/Tres asser Surface Water
❑
Output Section 3 - Vapor Intrusion Calculators
Output Form 3A
Resident Groundwater to Indoor Air
❑
Output Form 3B
Resident Soil Gas to Indoor Air
0
Output Form 3C
Resident Indoor Air
❑
Output Form 31)
Non -Residential Worker Groundwater to Indoor Air
❑
Output Form 3E
Non -Residential Worker Soil Gas to Indoor Air
0
Output Form 3F
Non -Residential Worker Indoor Air
❑
Output Section 4 - Contaminant Migration Worksheets
Output Form 4A
Soil to Groundwater - Forward Mode
❑
Output Form 4B
Groundwater to Groundwater - Forward Mode
❑
Output Form 4C
Soil to Surface Water - Forward Mode
❑
Output Form 41)
Groundwater to Surface Water - Forward Mode
❑
Output Form 4E
Soil to Groundwater - Backward Mode
❑
Output Form 4F
Groundwater to Groundwater - Backward Mode
❑
Output Form 4G
Soil to Surface Water - Backward Mode
❑
Output Form 4H
Groundwater to Surface Water - Backward Mode
❑
North Carolina DEQ Risk Calculator

Complete Exposure Pathways
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID:
Exposure Unit ID: Sub -Slab Soil Gas - Hypothetical Worst Case
Note: Risk output will only be calculated for complete exposure pathways.
Receptor
Pathway
Check box if
pathway
complete
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Soil
❑
Groundwater Use
❑
Non -Residential Worker
Soil
❑
Groundwater Use
❑
Construction Worker
Soil
❑
Recreator/Trespasser
Soil
❑
Surface Water
❑
VAPOR INTRUSION PATHWAYS
Resident
Groundwater to Indoor Air
❑
Soil Gas to Indoor Air
0
Indoor Air
❑
Non -Residential Worker
Groundwater to Indoor Air
❑
Soil Gas to Indoor Air
El
Indoor Air
❑
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Source Soil
❑
Source Groundwater
❑
Surface Water
Source Soil
❑
Source Groundwater
❑
North Carolina DEQ Risk Calculator

ID:
e Point Concentrations
Date: January 2023
November 2022 EPA RSL Table
Unit ID: Sub -Slab Soil Gas - Hvnothetical Worst Case
Soil Gas Exoosure Point Concentration Table
Description of Exposure Point Concentration Selection:
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
It the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
Exposure Point
Minimum
Maximum
Location of
Range of
Concentration
ScreeningPotential
Potential
Rationale for
Concentration
Notes:
CAS Number
Chemical
Concentration
Concentration
Units
Maximum
Detection
Used for
Background
Toxicity Value
ARAR/TBC
ARAR/TBC
COPC Flagation
Selection or
(ug/m3)
(Qualifier)
(Qualifier)
Concentration
Frequency
Limits
Screening
Value
(Screening
Value
Source
(Y/N)
Deletion
Level) (n/c)
212
67-64-1
Acetone
ug/m3
0.83
1
71-43-2
Benzene
I u9/m3
30.4
75-27-4
Bromodichloromethane
ug/m3
6.33
75-15-0
Carbon Disulfide
ug/m3
612
67-66-3
Chloroform
ug/m3
2.86
75-71-8
Dichlorodifluoromethane
ug/m3
6.09
123-91-1
Dioxane, 1,4-
ug/m3
0.392
1
141-78-6
Ethyl Acetate
I ug/m3
0.681
100-41-4
Ethylbenzene
ug/m3
0.492
109-99-9
—Tetrah drofuran
u9/m3
1.5
142-82-5
Heptane, N-
ug/m3
1.59
110-54-3
Hexane, N-
ug/m3
0.696
591-78-6
Hexanone,2-
ug/m3
9.79
67-63-0
Iso ro anol
u9/m3
12.5
78-93-3
Methyl Ethyl Ketone (2-Butanone)
ug/m3
2.57
108-10-1
Methyl Isobutyl Ketone (4-meth 1-2- entanone)
ug/m3
13.4
75-09-2
Methylene Chloride
u9/m3
1.49
91-20-3
—Naphthalene
ug/m3
4.28
115-07-1
Propylene
u9/m3
6.12
127-18-4
Tetrachloroeth lene
ug/m3
6.84
108-88-3
Toluene
u9/m3
0.605
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
ug/m3
1.97
75-69-4
Trichlorofluoromethane
u9/m3
8.06
95-63-6
Trimeth lbenzene, 1,2,4-
ug/m3
2.13
108-67-8
Trimethylbenzene, 1,3,5-
u9/m3
2.09
108-38-3
X lene, m-
ug/m3
1.44
95-47-6
Xylene, o-
u9/m3
North Carolina DEQ Risk C.I.I.lnf

Risk for Individual Pathways
1
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID:
Exposure Unit ID: Sub -Slab Soil Gas - Hypothetical Worst Case
DIRECT CONTACT SOIL AND WATER CALCULATORS
Receptor
Pathway
CarcinogenicHazard
Risk
Index
Risk exceeded?
Resident
Soil
NC
NC
NC
NC
Groundwater Use*
NC
NC
Non -Residential Worker
Soil
NC
NC
NC
NC
Groundwater Use*
NC
NC
Construction Worker
Soil
NC
NC
NC
Recreator/Trespasser
Soil
NC
NC
NC
Surface Water*
NC
NC
NC
VAPOR INTRUSION CALCULATORS
Receptor
Pathway
CarcinogenicRisk
Hazard Index
Risk exceeded?
Resident
Groundwater to Indoor Air
NC
NC
NC
Soil Gas to Indoor Air
1.6E-04
2.2E-01
YES
Indoor Air
NC
NC
NC
Non -Residential Worker
Groundwater to Indoor Air
NC
NC
NC
Soil Gas to Indoor Air
1.2E-05
1.7E-02
NO
Indoor Air
NC
NC
NC
CONTAMINANT MIGRATION CALCULATORS
Pathway
Source
Target Receptor Concentrations Exceeded?
Groundwater
Source Soil
Exceedence of 2L at Receptor?
NC
Source Groundwater
Exceedence of 2L at Receptor?
NC
Surface Water
Source Soil
Exceedence of 2B at Receptor?
NC
Source Groundwater
Exceedence of 213 at Receptor?
NC
Notes:
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 213 Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk -based
closure.
3. NM = Not modeled, user did not check this pathway as complete.
4. NC = Pathway not calculated, required contaminant migration parameters were not entered.
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Va or Intrusion -Resident Soil Gas to Indoor Air
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID:
Ex osure Unit ID: Sub -Slab Soil Gas - H othetical Worst Case
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
All concentrations are in u m3
Calculated
Target Indoor
Tar
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/m)
Indoor Air
Concentration
(ug/m3)
Air Conc. for
Carcinogens @
TCR = 1 E-06
get Indoor Air
Conc. for Non -
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
212
6.36
-
-
71-43-2
Benzene
0.83
0.0249
3.6E-01
6.3E+00
6.9E-08
8.0E-04
75-27-4
Bromodichloromethane
30.4
0.912
7.6E-02
-
1.2E-05
75-15-0
Carbon Disulfide
6.33
0.1899
-
1.5E+02
2.6E-04
67-66-3
Chloroform
612
18.36
1.2E-01
2.0E+01
1.5E-04
1.8E-01
75-71-8
Dichlorodifluoromethane
2.86
0.0858
-
2.1E+01
8.2E-04
123-91-1
Dioxane, 1,4-
6.09
0.1827
5.6E-01
6.3E+00
3.3E-07
5.8E-03
141-78-6
Ethyl Acetate
0.392
0.01176
-
1.5E+01
1.6E-04
100-41-4
Eth lbenzene
0.681
0.02043
1.1E+00
2.1E+02
1.8E-08
2.0E-05
109-99-9
-Tetrah drofuran
0.492
0.01476
-
4.2E+02
7.1E-06
142-82-5
H lane, N-
1.5
0.045
-
8.3E+01
1.1E-04
110-54-3
Hexane, N-
1.59
0.0477
-
1.5E+02
6.5E-05
591-78-6
Hexanone, 2-
0.696
0.02088
-
6.3E+00
6.7E-04
67-63-0
Iso ro anol
9.79
0.2937
-
4.2E+01
1.4E-03
78-93-3
Methyl Ethyl Ketone (2-Butanone)
12.5
0.375
-
1.0E+03
7.2E-05
108-10-1
Methyl Isobu 1 Ketone (4-meth 1-2- entanone)
2.57
0.0771
-
6.3E+02
2.5E-05
75-09-2
Methylene Chloride
13.4
0.402
1.0E+02
1.3E+02
4.0E-09
6.4E-04
91-20-3
-Naphthalene
1.49
0.0447
8.3E-02
6.3E-01
5.4E-07
1.4E-02
115-07-1
Propylene
4.28
0.1284
-
6.3E+02
4.1E-05
127-18-4
Tetrachloroethylene
6.12
0.1836
1.1E+01
8.3E+00
1.7E-08
4.4E-03
108-88-3
Toluene
6.84
0.2052
-
1.0E+03
3.9E-05
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
0.605
0.01815
-
1.0E+03
3.5E-06
75-694
Trichlorofluoromethane
1.97
0.0591
-
-
95-63-6
Trimeth lbenzene, 1,2,4-
8.06
0.2418
-
1.3E+01
3.9E-03
108-67-8
Trimeth lbenzene, 1,3,5-
2.13
0.0639
-
1.3E+01
1.0E-03
108-38-3
X lene, m-
2.09
0.0627
-
2.1E+01
6.0E-04
95-47-6
Were, o-
1.44
0.0432
-
2.1E+01
4.1E-04
North Carolina DEQ Risk Calculator

DEQ Risk Calculator - Vapor Intrusion - Non -Residential Worker Soil Gas to Indoor Air
Version Date: January 2023
Basis: November 2022 EPA RSL Table IL
Site ID:
Unit ID: Sub -Slab Soil Gas - Hvoothetical Worst Case
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk,
no risk values are calculated for these chemicals.
All concentrations are in ue/m3
CAS #
Chemical Name:
Soil Gas
Concentration
s
(ug/n')
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Cone. for
Carcinogens @
TCR = 1 E-06
Target Indoor Air
Carfor Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non -
Carcinogenic
Hazard
Quotient
67-64-1
Acetone
212
2.12
71-43-2
Benzene
0.83
0.0083
1.6E+00
2.6E+01
5.3E-09
6.3E-05
75-27-4
Bromodichloromethane
30.4
0.304
3.3E-01
9.2E-07
75-15-0
Carbon Disulfide
6.33
0.0633
-
6.1E+02
2.1E-05
67-66-3
Chloroform
612
6.12
5.3E-01
8.6E+01
1.1E-05
1.4E-02
75-71-8
Dichlorodifluoromethane
2.86
0.0286
-
8.8E+01
6.5E-05
123-91-1
Dioxane, 1,4-
6.09
0.0609
2.5E+00
2.6E+01
2.5E-08
4.6E-04
141-78-6
Ethyl Acetate
0.392
0.00392
6.1E+01
1.3E-05
100-41-4
Ethylbenzene
0.681
0.00681
4.9E+00
8.8E+02
1.4E-09
1.6E-06
109-99-9
-Tetrahydrofuran
0.492
0.00492
1.8E+03
5.6E-07
142-82-5
Heptane, N-
1.5
0.015
3.5E+02
8.6E-06
110-54-3
Hexane, N-
1.59
0.0159
6.1E+02
5.2E-06
591-78-6
Hexanone, 2-
0.696
0.00696
2.6E+01
5.3E-05
67-63-0
Isopropanol
9.79
0.0979
1.8E+02
1.1E-04
78-93-3
Methyl Ethyl Ketone (2-Butanone)
12.5
0.125
4.4E+03
5.7E-06
108-10-1
Methyl Isobutyl Ketone (4-methyl-2-pentanone)
2.57
0.0257
-
2.6E+03
2.0E-06
75-09-2
Methylene Chloride
13.4
0.134
1.2E+03
5.3E+02
1.1E-10
5.1E-05
91-20-3
-Naphthalene
1.49
0.0149
3.6E-01
2.6E+00
4.1E-08
1.1E-03
115-07-1
Propylene
4.28
0.0428
2.6E+03
3.3E-06
127-18-4
Tetrachloroethylene
6.12
0.0612
4.7E+01
3.5E+01
1.3E-09
3.5E-04
108-88-3
Toluene
6.84
0.0684
4.4E+03
3.1E-06
76-13-1
Trichloro-1,2,2-trifluoroethane, 1,1,2-
0.605
0.00605
4.4E+03
2.8E-07
75-69-4
Trichlorofluoromethane
1.97
0.0197
95-63-6
Trimethylbenzene, 1,2,4-
8.06
0.0806
5.3E+01
3.1E-04
108-67-8
Trimethylbenzene, 1,3,5-
2.13
0.0213
5.3E+01
8.1E-05
108-38-3
Xylene, m-
2.09
0.0209
8.8E+O1
4.8E-05
95-47-6
Xylene, o-
1.44
0.0144
8.8E+01
3.3E-05
Cumulative: I 1.2E-05 I 1.7E-02
North Carolina DEQ Risk Calculator