24062_South & Hollis_VIMS Install Report_Western_20240129

Via Email
January 29, 2024 NCDEQ – Division of Waste Management Brownfields Redevelopment Section 1646 Mail Service Center Raleigh, North Carolina 27699-1646 Attn: Mr. Bill Schmithorst Re: Vapor Intrusion Mitigation System Installation Completion Report – Western Section
South and Hollis LoSo South Boulevard and Hollis Road Charlotte, North Carolina
Brownfields Project No. 24062-20-060 H&H Project No. AKR.007
Dear Mr. Schmithorst: On behalf of KA LoSo Holdings LLC., Hart & Hickman, PC (H&H) has prepared the attached Vapor Intrusion Mitigation System (VIMS) Installation Completion Report for the Western Section of the multi-family apartment building at the South and Hollis LoSo Brownfields Property located in Charlotte, Mecklenburg County. Should you have questions or need additional information, please do not hesitate to contact us at [phone].
Sincerely,
Hart & Hickman, PC
Trinh DeSa, PE Haley Martin, PG
Engineering Manager Project Manager Enclosure: cc: Mr. Dan Coith and Mr. Dan Outen, Akridge (Via Email) Ms. Mary Katherine Stukes, Moore & Van Allen, PLLC (Via Email) Ms. Laura Truesdale, Moore & Van Allen, PLLC (Via Email) Mr. Matt Bramblett, PE, H&H (Via Email)

VIMS Installation Completion Report -
Western Section

South and Hollis LoSo
South Boulevard and Hollis Road
Charlotte, North Carolina

Brownfields Project ID No. 24062-20-060

H&H Job No. AKR.007 January 29, 2024

#C-1269 Engineering #C-245 Geology
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VIMS Installation Completion Report – Western Section South and Hollis LoSo
South Boulevard and Hollis Road Charlotte, North Carolina Brownfields Project No. 24062-20-060 H&H Job No. AKR.007
Table of Contents 1.0 Introduction .............................................................................................................................1
2.0 VIMS Installation and Influence Testing .............................................................................4
2.1 VIMS Installation ..................................................................................................................4
2.2 VIMS Influence Testing ........................................................................................................6
3.0 Pre-Occupancy VIMS Effectiveness Sampling ....................................................................8
3.1 Sub-Slab Vapor Sampling Methodology ...............................................................................8
3.2 Sub-Slab Vapor Sampling Results ........................................................................................9
3.3 Sub-Slab Vapor Intrusion Evaluation ..................................................................................10
4.0 Summary and Conclusions...................................................................................................12
5.0 Post-Occupancy and Retail Pour-Back Requirements ......................................................14
6.0 Engineer’s Certification .......................................................................................................15
List of Tables

Table 1 Summary of Sub-Slab Vapor Analytical Results
List of Figures

Figure 1 Site Location Map
Figure 2 Site Map
Figure 3 Sample Location Map

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List of Appendices

Appendix A Historical Data Summary Tables and Sample Location Maps
Appendix B As-Built Drawings
Appendix C VIMS Installation Photographs
Appendix D VIMS Product Specification Sheets
Appendix E Field Forms and Field Data
Appendix F Laboratory Analytical Report
Appendix G DEQ Risk Calculators
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VIMS Installation Completion Report – Western Section South and Hollis LoSo
South Boulevard and Hollis Road Charlotte, North Carolina Brownfields Project No. 24062-20-060 H&H Job No. AKR.007
1.0 Introduction

On behalf of KA LoSo Holdings LLC (Prospective Developer, PD), Hart & Hickman, PC (H&H)
has prepared this report to document vapor intrusion mitigation system (VIMS) installation,
influence testing, and pre-occupancy sub-slab vapor and indoor air assessment activities completed
at the South and Hollis LoSo North Carolina Department of Environmental Quality (DEQ)
Brownfields property (Brownfields Project No. 24062-20-060). The Brownfields property is
located at the intersection of South Boulevard and Hollis Road in Charlotte, Mecklenburg County,
North Carolina (Site or subject Site). The Site consists of one approximate 2.62-acre parcel of
land (Parcel Identification Number 14905301) which has been redeveloped with a six-story
apartment building that is known as South and Hollis LoSo. The ground floor (Level 1) of the
building is comprised of apartment units, retail units, leasing, office, amenity, and mechanical
areas. An open-air parking garage separates the ground floor residential units from the ground
floor retail units. The enclosed space of the ground floor is approximately 53,000 square feet (sq
ft). Level 2 and subsequently higher levels consist of residential apartment units and mechanical
rooms. A Site location map is provided as Figure 1, and a Site map is provided as Figure 2.

Vapor intrusion assessment was completed at the Site in April 2021 and was reported in the
Brownfields Assessment Report dated June 9, 2021. A review of the soil gas sample results
indicated the presence of organic compounds, including 1,1,2,2-tetrachloroethane, naphthalene,
and benzene, at concentrations above the DEQ Residential Vapor Intrusion Soil Gas Screening
Levels (SGSLs). Other organic compounds were detected at concentrations above the laboratory
reporting limits, but below the DEQ Residential Vapor Intrusion SGSLs in the soil gas samples.
The risk calculator results using worst-case compound concentrations detected in the soil gas
samples under a residential use scenario indicated that the calculated risks were within DEQ
acceptable levels.
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A Brownfields Agreement between DEQ and the PD was recorded for the Site on June 2, 2022.
Paragraph 12.h. of the recorded Brownfields Agreement generally states that no enclosed building
may be constructed on the property until DEQ determines in writing that the building would be
protective of users from risks of potential vapor intrusion. Although the previous assessment risk
calculator results did not indicate unacceptable vapor intrusion risk to future residents of the Site,
the PD elected to install a VIMS within the building as a proactive measure. H&H prepared the
Vapor Intrusion Mitigation Plan (VIMP) and revisions to the VIMP based on DEQ comments.
The VIMP Revision 2 dated December 17, 2021 was approved by DEQ in an email dated
December 22, 2021.

The VIMP includes installation of a passive VIMS below enclosed ground floor areas of the
building. This excludes the open-air parking garage because the garage is not enclosed. Based on
the building layout, the VIMS was separated into different sections to optimize performance. Each
VIMS section operates as a passive sub-slab venting system that includes a network of horizontal
sub-slab and vertical above-slab riser piping connected to wind-driven turbine ventilators installed
above the roof of the building. In addition, a vapor barrier was installed below the ground floor
slabs and along select vertical walls.

The building is being completed in sections with multiple turnover dates, or occupancy dates,
planned for two different sections of the building. For ease of reference, the building is separated
into the Western Section and the Eastern Section as depicted on Figure 2. The Eastern Section of
the building comprises the majority of the enclosed ground floor of the building where the
residential ground floor apartment units are located. The VIMS installation and efficacy testing
activities for the Eastern Section are documented in the VIMS Installation Completion Report -
Eastern Section dated August 23, 2023. Based on the results of the VIMS efficacy testing, DEQ
Brownfields issued a compliance letter for the Eastern Section on September 29, 2023.

The ground floor of the Western Section consists of retail pour-back areas, a dogwash station, and
the parking garage, with residential units located on Level 2 and above. In addition, there is one
stairwell (Stair 1) located in the northern portion the Western Section that connects to upper floors.
There are no ground floor residential units in the Western Section. On the upper floors, the
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Western and Eastern Sections along the southern portion of the parking garage are interconnected
with a hallway and residential units. A fire door separates the Western and Eastern Sections on
each upper floor which act to prevent direct air transfer across the Western and Eastern Sections.
The upper floors of the Western Section, where the ground floor retail spaces are located, are
expected to turn over to residential occupants in February 2024.

Prior to occupancy, it was determined that Stair 1 and the dogwash station located in the Western
Section was to be turned over for resident use with the Eastern Section apartment units. At the
request of the PD, H&H provided a summary inspections and pilot test activities for Stair 1 and
the dogwash station to DEQ via email on December 21, 2023. Based on the results of the
inspections and pilot testing activities, DEQ provided approval via email on December 22, 2023
for use of Stair 1 and the dogwash station ahead of submittal of this report.

This report summarizes VIMS installation and testing activities for the Western Section. A
discussion of VIMS installation and influence testing activities is provided in Section 2.0; a
summary of VIMS effectiveness sampling activities is provided in Section 3.0; a summary and
conclusions based on the results of the VIMS installation, soil vapor, and indoor air assessment
activities are provided in Section 4.0, a description of post-occupancy and retail pour-back
requirements are provided in Section 5.0, and the engineer’s certification statement is provided in
Section 6.0.

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2.0 VIMS Installation and Influence Testing

A summary of the VIMS inspections and influence testing for the Western Section of the building
is described in the following sections. As-built drawings depicting the layout of the VIMS (VM-
1) and the system specifications and details (VM-2, VM-2A, and VM-3) are provided in
Appendix B. Representative installation photographs are included in Appendix C and product
specifications for the main VIMS components are included in Appendix D.

2.1 VIMS Installation

During installation of the VIMS, H&H conducted inspections during various phases of
construction to confirm the VIMS was installed in accordance with the DEQ-approved VIMP.
Inspections were completed by or under direction of a North Carolina Professional Engineer
(NC PE) during the following phases of installation:
(1) Inspection of the base course gravel layer, sub-slab piping layout, and monitoring points
prior to installing the vapor barrier;
(2) Inspection of the vapor barrier prior to pouring concrete and inspection of vapor barrier
at select vertical walls prior to backfilling around the walls;
(3) Inspection of vapor barrier installed within the retail pour-back areas;
(4) Inspection of above-grade vertical riser piping including labels; and
(5) Inspection of turbine ventilators on the rooftop.

Based on observations made during the VIMS inspections, the VIMS was installed in general
accordance with the DEQ-approved VIMP. The Western Section contains three retail pour-back
areas (Retail A, Retail B – North, and Retail B – South) on the ground floor of the building. One
change occurred during construction which involved separating the sub-slab vent pipe between
Retail B – North and Retail B – South due to installation of a footing between these two areas.
Each area of Retail B contains one riser and one monitoring point so the VIMS separation also
allows for future upfit of each individual area without impacting the performance of the VIMS in
the other retail area. A brief summary of the main VIMS components is provided in the following
paragraphs.
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Passive sub-slab vapor extraction is achieved through an interconnected system of 3-inch Schedule
(SCH) 40 PVC perforated vapor collection/conveyance piping installed in a 4-inch to 5-inch
permeable gravel layer beneath the building. The permeable gravel layer (clean #57 stone) was
installed beneath the mitigated areas of the building to enhance sub-slab vapor transmission and
allow for air movement beneath the slab. The sub-slab vapor collection piping is connected to
four (4) 4-inch SCH 40 PVC risers (F-A1 and F-A2 in Retail A, and F-BN1 and F-BS1 in Retail
B) in the Western Section which extend vertically through the building and discharge collected
vapors above the roof of the building. The vertical riser pipes were labeled in accordance with the
VIMP and representative labels are depicted in the photographic log provided in Appendix C. The
roof of the building is a flat roof with parapets along the perimeter. Empire Model TV04SS
(stainless steel) turbine ventilators were installed on the discharge of the exhaust stacks on the roof
to enhance the air flow from the risers during times of wind.

Vaporblock® Plus 20 (VBP20), a vapor barrier manufactured by Viaflex, Inc. (Viaflex), formerly
known as Raven, was installed above the gravel layer and beneath the concrete slab of the building.
VBP20 is an ASTM-certified 20-mil, multi-layer, chemically-resistant vapor barrier designed to
prevent structural vapor intrusion of volatile organic compounds (VOCs). The vapor barrier was
installed by the construction contractor to cover the footprint of enclosed building spaces. Vapor
barrier was also installed along the base and sidewalls of the elevator pit, along select vertical
retaining walls as depicted in the as-built drawings (Appendix B), and below the electric and
maintenance rooms located in the parking garage. Briefly, the exterior edges of the VBP20 were
laid underneath the footings and/or attached and sealed to existing concrete utilizing VaporSeal™
tape, Butyl Seal double-sided tape, and Cetco CETSEAL, a Viaflex-approved vapor barrier
adhesive. Seams within the building footprint were installed with a minimum 12-inch overlap and
were sealed with VaporSeal™ tape. Product specifications are provided in Appendix D. Utility
banks that contained more than several utility conduits that couldn’t be sealed using standard tape
and patch methods were sealed using Viaflex Pour-N-Seal™.

The VIMS also includes permanent monitoring points constructed with 2-inch diameter SCH 40
PVC pipes. The Western Section of the building includes a total of four (4) permanent monitoring
points (MP-A1, MP-A2, MP-BN1, and MP-BS1). The monitoring points were used to measure
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the pressure differential between ambient air and the sub-slab during influence testing activities
described below, and for collection of sub-slab vapor samples (Section 3.0). Several monitoring
points are located in the retail pour-back spaces. During upfit, the specific location of the
monitoring points may need to be shifted based on the future layout of the spaces. If the monitoring
points will notably move from the current locations, DEQ will be notified of the new proposed
monitoring point locations. The monitoring points in building areas with completed slabs are
secured within a flush-mount sewer cleanout-type cover and an expandable well plug located on
the 2-inch pipe that allows for an airtight seal, and the monitoring points in the pour-back spaces
currently contain a 2-inch PVC pipe and an expandable well plug. The monitoring point as-built
details are included on Sheets VM-2A and VM-3 provided in Appendix B.

2.2 VIMS Influence Testing

On December 20, 2023, H&H completed initial influence (pilot) testing on the VIMS in the
Western Section to evaluate sub-slab vacuum communication across the completed slab and
document that sufficient depressurization can be obtained should electric fans be needed in the
future. DEQ considers 4 Pascals (Pa), or 0.016-inches inches of water column (in-WC) the
minimum vacuum needed for an active depressurization system to demonstrate adequate sub-slab
depressurization. A summary of the influence testing results is provided below.

VIMS vacuum influence pilot testing included use of standard radon-style electric fans including
Festa AMG Eagle Extreme (Eagle Extreme) fans temporary installed on the discharge end of the
completed risers on the roof to model an active depressurization system. Differential pressure
measurements were collected at each vacuum monitoring point using a Dwyer series 475 Mark III
Digital manometer (capable of measuring 0.001 in-WC or 0.25 Pa) to establish baseline conditions
prior to operation of the electric fans. Following collection of baseline differential pressure
measurements, the electric fans were turned on, and differential pressure measurements were
collected at each monitoring point.

Results of the December 2023 influence tests indicated sub-slab vacuum measured at the
monitoring points within the residential VIMS areas ranged from 0.024 in-WC to 0.054 in-WC,
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which demonstrates vacuum above the DEQ minimum of 0.016 in-WC could be achieved using
fans to pull from below the slab of each VIMS area. The locations of the monitoring points are
shown in Sheet VM-1 provided in Appendix B, and the influence test field data are included in
Appendix E.

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3.0 Pre-Occupancy VIMS Effectiveness Sampling

Following installation of the VIMS, completion of successful influence testing, and enclosure of
the building envelope in the testing areas, H&H collected a total of three (3) sub-slab vapor
samples. The sub-slab vapor assessment activities were conducted in accordance with the
DEQ-approved VIMP and the DEQ Division of Waste Management (DWM) Vapor Intrusion
Guidance (Guidance) dated March 2018. Details of the sub-slab soil gas sampling activities and
results are provided in the following sections.

3.1 Sub-Slab Vapor Sampling Methodology
On December 29, 2023, H&H collected sub-slab vapor samples from select permanent monitoring
points. The sampling was performed following VIMS installation activities and approximately
two months after installation of the risers and turbine ventilators. As shown in Figure 3, the sub-
slab vapor samples were collected from permanent monitoring points MP-BS1 (Retail B – South),
MP-BN1 (Retail B – North), and MP-A1 (Retail A).

In addition to the sub-slab vapor samples described above, one duplicate sub-slab vapor sample
(MP-DUP) was collected for quality assurance/quality control (QA/QC) purposes from the MP-
BN1 parent location. The duplicate sample was collected utilizing a laboratory supplied stainless-
steel sampling “T” fitting which allows for the simultaneous collection of two sub-slab vapor
samples from a single location.

To collect the sub-slab vapor samples, Teflon sample tubing was secured to a 2-inch expandable
well cap with a sampling port that was secured onto the 2-inch diameter PVC monitoring point.
The tubing was connected to an airflow regulator and laboratory-supplied batch-certified 1-liter
stainless steel Summa canister. The air flow regulator was preset by the laboratory to collect a soil
vapor sample over a 10-minute period at a flow rate of approximately 100 milliliters per minute.

Prior to sample collection, H&H conducted a leak test at each monitoring point by placing a shroud
around the monitoring point, expandable well cap, and sampling train including the Summa
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canister. The air within the shroud was flooded with helium gas and concentrations were measured
with a calibrated helium detector. Helium concentrations within the shroud were maintained
between approximately 10% and 13%. A GilAir vacuum pump was connected to the sample
tubing outside of the shroud and used to purge a minimum of three volumes (monitoring point and
sample train) of soil vapor into a Tedlar® bag at each sampling point. The helium gas detector was
used to measure helium concentrations within the Tedlar bag sample to confirm helium
concentrations in the sample train were less than 10% of that measured within the shroud. Results
of the helium leak checks indicated that unacceptable short-circuiting at the monitoring points or
within the sampling train was not present. Sub-slab vapor sampling field forms completed by
sampling personnel are included in Appendix E.

Following successful leak checks, the air flow regulators were opened to allow collection of the
sub-slab vapor samples. Vacuum in the Summa canisters was monitored during the sampling
event to confirm adequate sample volume was collected at each monitoring point location. Upon
completion of sample collection, the air flow regulator was closed to the Summa canister. The
canisters were labeled with the sample identification, beginning and ending times, pressure
measurements, and the requested analysis. The canisters were then placed in laboratory supplied
shipping containers and delivered to Pace Analytical Services (Pace) under standard chain of
custody protocols for analysis of VOCs by Environmental Protection Agency (EPA) Method TO-
15.

3.2 Sub-Slab Vapor Sampling Results

The sub-slab vapor sample analytical results for the Western Section are summarized in Table 1.
Note, the previous Eastern Section data is also included on Table 1 for reference. The ground floor
of the Western Section is primarily comprised of retail pour-back spaces, but as a conservative
measure because the upper floors of the building contain residential units, the data was compared
to the DEQ Vapor Intrusion Residential SGSLs. Table 1 also includes the DEQ Vapor Intrusion
Non-Residential SGSLs for reference. The laboratory analytical report and the chain of custody
record are provided as Appendix F.

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Laboratory analytical results indicate the presence of several compounds at concentrations above
the laboratory method detection limits but below the DEQ Vapor Intrusion Residential SGSLs.
Benzene, a Site compound of concern (see Section 1.0), was detected in each soil gas sample at
low estimated laboratory “J” flag concentrations (ranging from 0.22 J micrograms per cubic meter
[µg/m3] to 0.59 J µg/m3) below the DEQ Residential Vapor Intrusion SGSL of 12 µg/m3. The
compound 1,1,2,2-tetrachloroethane and the chlorinated solvent compounds tetrachloroethylene
(PCE) and trichloroethylene (TCE) were not detected above the laboratory method detection limits
in the sub-slab vapor samples collected. The duplicate sample (MP-DUP) data compared to the
parent sample (MP-BN1) indicated similar compound detections and similar concentrations.

3.3 Sub-Slab Vapor Intrusion Evaluation
The DEQ Vapor Intrusion SGSLs are conservative and based on a target carcinogenic risk (TCR)
of 1 x 10-6 and a hazard quotient (HQ) of 0.2 for potential non-carcinogenic risks. The DEQ and
EPA typically acceptable risk level for potential carcinogenic risks is a cumulative lifetime
incremental cancer risk (LICR) of 1 x 10-4 or less, and the acceptable level for non-carcinogenic
risks is a cumulative hazard index (HI) of 1 or less. The HI is the sum of hazard quotients (HQs)
for each target analyte.

To further evaluate sub-slab vapor concentrations, H&H utilized the DEQ Risk Calculator (July
2023) to calculate potential vapor intrusion risks. H&H modeled a worst-case scenario by using
the highest concentrations of any compound detected below the slab based on a residential use
scenario to conservatively evaluate potential vapor intrusion risks. The calculated cumulative
LICR and HI values are provided in Table 1, and copies of the completed DEQ Risk Calculators
are provided in Appendix G.

As shown in Table 1, results of the worst-case risk calculations for sub-slab vapor indicate a
calculated cumulative LICR of 1.8 x 10-7 and a HI value of 0.017 under a residential use scenario.
The calculated risk levels under a non-residential use indicate a calculated cumulative LICR of
1.4 x 10-8 and an HI value of 0.0013. The calculated cumulative LICR and HI are within the DEQ
and EPA acceptable levels under both residential and non-residential use scenarios. As noted

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in the sections above, the ground floor of the Western Section will be used for retail purposes with
residential units located on the floors above. The analytical data and risk calculations do not
indicate there is the potential for unacceptable vapor intrusion risk to the occupants of the retail
units or residential units in the Western Section of the multi-family apartment building.

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4.0 Summary and Conclusions

Installation of the VIMS has been completed in the Western Section of the building at the South
and Hollis LoSo Brownfields property (Brownfields Project No. 24062-20-060). Results of
installation inspections, influence testing, and effectiveness sampling activities indicate that the
VIMS has been installed in accordance with the DEQ-approved VIMP. The VIMS installation
and testing activities for the Eastern Section of the building was submitted to DEQ under separate
cover. Therefore, the VIMS construction for the apartment building is complete with the exception
for future retail tenant upfits.

During construction of the building, H&H conducted VIMS installation inspections to verify that
the system was installed as designed and completed pre-occupancy VIMS testing activities to
evaluate effectiveness of the VIMS. The VIMS installation inspections and post-installation
testing activities were completed in general accordance with the DEQ-approved VIMP. A brief
summary of the VIMS installation and post-installation effectiveness assessment activities is
provided below.

VIMS Installation and Influence Testing
VIMS installation has been completed for the Western Section of the building that primarily
consists of three retail pour-back areas on the ground floor with residential apartment units located
on upper floors. Upfit of the retail areas will occur at a later date after tenants lease the spaces.
The VIMS operates as a passive sub-slab venting system with vertical extraction piping connected
to wind-driven ventilators on the roof that enhance air exhaust from the risers. During installation
of the VIMS, H&H personnel, under direction of a North Carolina licensed Professional Engineer,
conducted inspections during each stage of installation. Results of the installation inspections
indicate that the VIMS was installed in accordance with the DEQ-approved VIMP.

H&H completed vacuum influence pilot testing following installation of the VIMS piping network
to evaluate vacuum communication beneath the slab. Final vacuum measurements collected
during the influence testing activities indicate that vacuum communication beneath the slab was
achieved with acceptable differential pressure levels.
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VIMS Effectiveness Testing – Sub-Slab Vapor Sampling
Laboratory analytical results indicate that no compounds were detected above DEQ Vapor
Intrusion Residential or Non-Residential SGSLs in the sub-slab vapor samples. Results of the
hypothetical worst-case risk calculations for the ground level of the Western Section indicated
acceptable risk levels for the cumulative residential LICR and HI.

Summary & Conclusion
Based on the VIMS installation inspections, influence testing, and post-installation sub-slab vapor
sampling results, the VIMS in the Western Section of the Site building was installed in accordance
with the DEQ-approved VIMP, and sub-slab vapor risk calculations are within acceptable levels.
This report is intended to satisfy the Brownfields Agreement land use restriction paragraph 12.h
regarding vapor intrusion for the portion of the building described herein. Note, DEQ previously
provided compliance approval for the Eastern Section of the building in September 2023. As such,
the pre-occupancy requirements for the VIMS of the South & Hollis LoSo apartment building is
complete.

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5.0 Post-Occupancy and Retail Pour-Back Requirements

A description of post-occupancy and retail pour-back area requirements are listed below.

Post-Occupancy Requirements
In accordance with the DEQ-approved VIMP, post-occupancy sub-slab vapor and indoor air
sampling events for the entire building will be completed on an annual basis, with the first event
expected to be performed in Summer or Fall 2024, or approximately one year after building
occupancy. In accordance with the VIMP, if post-occupancy annual sampling event results
indicate consistent or decreasing concentrations within acceptable risk levels after two events, a
request to modify or terminate sampling will be submitted for DEQ review with DEQ written
approval required prior to modifications to the sampling frequency and locations.

Retail Pour-Back Area Requirements
Upon tenant plans to upfit the retail spaces in the Western Section, the following activities will be
performed in accordance with the procedures described within this report and the VIMP:
• Inspections of the VIMS by a NC PE including the sub-slab stone and vent piping, vapor
barrier, and/or other components impacted by the upfit activities (Section 2.1);
• Additional influence / pilot test of the retail tenant space after the concrete slab of each
retail area is poured (Section 2.2);
• An additional sub-slab vapor analytical sample will be collected in each pour-back after
the slab is poured. Based on the timing of upfit activities and the post-occupancy annual
sampling events described above, a request to combine sub-slab vapor sampling events
may be submitted to DEQ for review and approval;
• A report documenting the upfit activities including the VIMS inspections and testing
activities will be submitted to DEQ for review and approval prior to use, or occupancy, of
each retail area; and
• The property management group for the building shall report activities in the pour-back
areas that could impact the installed vapor barrier or other VIMS components to a NC PE.
The vapor barrier, vent piping, or other VIMS components, if damaged, shall be repaired
and the repairs shall be reported to DEQ within 30 days of completion.
15
https://harthick.sharepoint.com/sites/masterfiles-1/shared documents/aaa-master projects/akridge (akr)/akr.007 loso brownfields implementation/vims install/western/report/24062-20-060_south & hollis_vims install report_western.docx
6.0 Engineer’s Certification

According to the DWM Vapor Intrusion Guidance: “Risk-based screening is used to identify sites
or buildings likely to pose a health concern, to identify buildings that may warrant immediate
action, to help focus site-specific investigation activities or to provide support for building
mitigation and other risk management options including remediation.” The design and installation
of the vapor intrusion mitigation system was conducted to satisfy the vapor intrusion mitigation
condition in the Brownfields Agreement. Per the North Carolina Brownfields Property Reuse Act
130A-310.32, a prospective developer, with the assistance of H&H for this project, is to provide
NCDEQ with “information necessary to demonstrate that ... as a result of the implementation of
the brownfields agreement, the brownfields property will be suitable for the uses specified in the
agreement while fully protecting public health and the environment instead of being remediated to
unrestricted use standards.” It is in the context of these risk-based concepts that H&H’s
professional engineer makes the following statement.

“The Vapor Intrusion Mitigation System (VIMS) detailed herein is designed to mitigate intrusion
of subsurface vapors into the subject building from known Brownfields Property contaminants in
a manner that is in accordance with the most recent and applicable guidelines including, but not
limited to, DWM Vapor Intrusion Guidance, Interstate Technology & Regulatory Council (ITRC)
guidance, and American National Standards Institute (ANSI)/American Association of Radon
Scientists and Technologists (AARST) standards. The sealing professional engineer below is
satisfied that the design and its installation are fully protective of public health from known
Brownfields Property contaminants.
[SEAL]

Trinh DeSa NC PE #044470 Hart & Hickman, PC (#C-1269
Table 1Summary of Sub-Slab Vapor Analytical ResultsSouth Hollis LoSo South Boulevard and Hollis RoadCharlotte, North CarolinaBrownfields Project No. 24062-20-060H&H Job No. AKR.007Sample LocationSample IDMP-1 MP-2 MP-4 MP-5 MP-8 MP-10 MP-13 MP-A1 MP-BS1Date Collected7/3/2023UnitsVOCs (TO-15)Acetone<5762 J 130<57150 130 320 830 74 16 J 270 280 440 NE NEBenzene<2.4 <2.4 <0.48 <2.4 <2.4 <2.45.2 9.9 0.49 J 0.59 J 0.40 J 0.24 J 0.22 J 12 160Carbon Disulfide<2.9 <2.90.72 J<2.9 <2.9 <2.9 <2.9 <2.90.69 J<1.2 <1.2 <1.2 <1.24,900 61,000Carbon Tetrachloride<5.0 <5.0 <1.0 <5.0 <5.0 <5.0 <5.0 <5.0 <1.00.60 J 0.65 J 0.63 J 0.45 J 16 200Chloroform<4.6 <4.61.4<4.6 <4.6 <4.6 <4.6 <4.6 <0.93 <0.25 <0.250.27 J<0.254.1 53Chloromethane<1.61.8 J 0.36 J<1.67.3<1.6 <1.6 <1.61.3 1.1 0.60 J 0.64 J 0.78 J 630 7,900Cyclohexane<2.1 <2.14.2<2.13.1 J 3.1 J<2.19.8<0.421.6 0.81 0.37 J 1.8 42,000 530,000Dichlorodifluoromethane<5.6 <5.61.4<5.6 <5.6 <4.8 <5.6 <5.61.4 4.6 2.7 2.9 2.8 700 8,800Ethanol 860 130 130 7,200 E 180 160 47 J 17,000 E 18 21 13 J 17 20 NE NEEthylbenzene1,2001,300240 420 120 120<2.5 <2.510<0.250.50 J 0.49 J 0.97 37 4904-Ethyltoluene 45 91 11 16 4.2 J 4.5 J 1,000 1,500 0.94 J<0.43 <0.43 <0.43 <0.43NE NE1,1,2-Trichloro-1,2,2-trifluoroethane<8.5 <8.5 <1.7 <8.5 <8.5 <8.5 <8.5 <8.5 <1.70.86 J 0.71 J 0.71 J 0.77 J 35,000 440,000Heptane<2.6 <2.6 <0.52 <2.6 <2.6 <2.6 <2.67.0<0.520.54 J<0.52 <0.52 <0.522,800 35,0002-Hexanone<2.0 <2.0 <0.41 <2.0 <2.0 <2.0 <2.0 <2.05.4<0.35 <0.35 <0.35 <0.35210 2,600Isopropyl Alcohol<17 <17 <3.4 <17 <17 <1724 J 22 J<3.47.6 J 11 J 12 J 54 1,400 18,000Methyl Ethyl Ketone (MEK) 78 J 330 560<31520 480 350 240 360 13 J 310 330 790 35,000 440,0004-Methyl-2-Pentanone<2.2 <2.20.49 J<2.2 <2.2 <2.2 <2.2 <2.21.8<0.43 <0.43 <0.43 <0.4321,000 260,000Styrene<2.2 <2.20.49 J<2.2 <2.2 <2.24.1 J 8.3 0.89<0.46 <0.46 <0.46 <0.467,000 88,000Tetrachloroethene<5.2 <5.22.9<5.2 <5.2 <5.2 <5.2 <5.22.3<0.51 <0.51 <0.51 <0.51280 3,500Tetrahydrofuran 25 J 170 340<4.8680 620 230 81 680 7.6 5.0 J 5.8 J 16 14,000 180,000Toluene 8.7 13 14 8.9 6.8 6.3 86 160 12 0.74 J 0.48 J 0.54 J 0.51 J 35,000 440,000Trichloroethene<3.6 <3.6 <0.72 <3.6 <3.6 <3.6 <3.6 <3.6 <0.72 <0.44 <0.44 <0.44 <0.4414 180Trichlorofluoromethane<6.6 <6.6 <1.3 <6.6 <6.6 <6.6 <6.6 <6.6 <1.31.6 J 1.5 J 1.6 J 1.5 J NE NE1,2,4-Trimethylbenzene 20050054 76 25 214,100 6,6006.7<0.45 <0.45 <0.450.67 J 420 5,3001,3,5-Trimethylbenzene 45 96 11 15 4.3 J 4.4 J1,000 2,1001.1<0.51 <0.51 <0.51 <0.51420 5,300o-Xylene1,200 1,800240 420 130 130<2.2 <2.213 0.33 J 1.1 1.2 2.6 700 8,800mp-Xylene3,400 5,400 750 1,700520 520<4.9 <4.946<0.611.2 J 1.4 J 3.7 700 8,800Xylene (Total)4,600 7,200 990 2,120650 650<2.2 <2.259 0.33 J 2.3 J 2.6 J 6.3 700 8,800DEQ Cumulative Risk Calculator (2)Residential LICRResidential Non-Carcinogenic HINon-Residential LICRNon-Residential Non-Carcinogenic HINotes:1) North Carolina Department of Environment Quality (DEQ) Vapor Intrusion Sub-Slab & Exterior Soil Gas Screening Levels (SGSLs) dated July 2023.2) DEQ Cumulative Risk Calculator dated July 2023 and based on TCR of 1.0 x 10-6 and a THQ of 0.2.Analytical method is shown in parenthesis. Only constituents detected in at least one sample and select chlorinated compounds are shown in the table above.Compound concentrations and SGSLs are reported in micrograms per cubic meter (µg/m3).Compound concentrations are reported to the laboratory method detection limits.Bold values exceed the DEQ Residential Vapor Intrusion SGSL or Residential Non-Carcinogenic HI.Underlined values exceed the DEQ Non-Residential Vapor Intrusion SGSL.VOCs = volatile organic compounds; NE = not established; LICR = lifetime incremental cancer risk; HI = hazard index; TCR = target cancer risk; THQ = target hazard quotientJ =Compound was detected at a concentration above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration. E = Compound was detected at a concentration above the verified calibration range and is laboratory estimated value.µg/m3Western Section12/29/20232.7 x 10-6≤1.0 x 10-40.50≤1.0Worst-Case Risk CalculationsAcceptable Risk Levels3.6 x 10-5≤1.0 x 10-46.3≤1.0Eastern SectionScreening CriteriaMP-6 / MP-DUPResidentialSGSLs (1)MP-BN1/MP-DUPNon-Residential SGSLs (1)7/2/20231.8 x 10-70.017Worst-Case Risk Calculations1.4 x 10-80.0013https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Akridge (AKR)/AKR.007 LoSo Brownfields Implementation/VIMS Install/Western/Tables/Sampling Data Tables_update1/29/2024Table 1 (Page 1 of 1)Hart & Hickman, PC
USGS The National Map: National Boundaries Dataset, 3DEP ElevationProgram, Geographic Names Information System, National HydrographyDataset, National Land Cover Database, National Structures Dataset, andNational Transportation Dataset; USGS Global Ecosystems; U.S. CensusBureau TIGER/Line data; USFS Road Data; Natural Earth Data; U.S.Department of State Humanitarian Information Unit; and NOAA NationalCenters for Environmental Information, U.S. Coastal Relief Model. Datarefreshed August, 2021.
SITE LOCATION MAP
SOUTH AND HOLLIS LOSOSOUTH BOULEVARD AND HOLLIS ROADCHARLOTTE, NORTH CAROLINA
DATE: 7-25-2023
JOB NO: AKR-007
REVISION NO: 0
FIGURE NO: 1
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
TITLE
PROJECT
0 2,000 4,000
SCALE IN FEET
SITE
Path: S:\AAA-Master Projects\Akridge\AKR.007 LoSo Brownfields Implementation\Redevelopment Report\2022\Figures\Figure-1.mxdN
U.S.G.S. QUADRANGLE MAP
CHARLOTTE EAST, NORTH CAROLINA 2019CHARLOTTE WEST, NORTH CAROLINA 2019
QUADRANGLE7.5 MINUTE SERIES (TOPOGRAPHIC)
REVISION NO. 0
JOB NO. AKR-007
DATE: 8-8-23
FIGURE NO. 2
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINA
SITE MAP
LEGEND
BROWNFIELDS PROPERTY BOUNDARY
PARCEL BOUNDARY LINE
EASTERN BUILDING SECTION
WESTERN BUILDING SECTION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
H
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A
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UNDER
CONSTRUCTIONMULTI-TENANT RETAIL
(3609 SOUTH BOULEVARD)
RESIDENTIAL
WESTON STREETSOUTH BOULEVARDSOUTH BOULEVARDH
A
R
T
F
O
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A
V
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N
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GOLDIES
(3601 SOUTH BOULEVARD)
NOTES:
1.PARCEL DATA AND AERIAL IMAGERY OBTAINED FROM
MECKLENBURG COUNTY GIS, 2023.
SATTO TIRES
(3407 SOUTH BOULEVARD)
MASTER AUTO COLLISION
(3411 SOUTH BOULEVARD)
WESTERN SECTION
EASTERN SECTION
S:\AAA-Master Projects\Akridge\AKR.007 LoSo Brownfields Implementation\VIMS Install\Figures\Site Map_20230808.dwg, FIG.2 (2), 8/8/2023 4:09:04 PM, jlima
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A3.0-M1
A4.0-M1
CORRIDOR
A5.0-M1
A5.0-M1
B2.0-M1
A4.0-M1
A4.0-M1
B2.0-M1
A1.0-M1
A1.0-M1
B2.0-M1
A3.0-M1
A3.0-M1
A3.0-M1
A4.0-M2
ELEC.
STOR.CHEMSTOR.POOL
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ELEC./IDF
A5.0-M4 A5.0-M5
A1.0-M3 A1.0-M3 A1.0-M3
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A3.0-M2
A1.0-M2
A1.0-M2
STOR.
MECH.
MAIN
ELEC.
MECH.
STAIR 3
CORRIDOR
740.50 TOS
740.50 TOS
738.00 TOS
738.85 TOS
739.20 TOS
739.50 TOS
POOL
COURTYARD
RESIDENT
TRASH
RETAIL
TRASH
MAINTENANCE
CYCLE
CENTERSTAIR 1
GARAGE
ELEV.
LOBBY
STAIR 2
ELEV.
1
ELEV.
2
RETAIL
B ELEC.741.00 TOS
741.65 TOS
739.00 TOS
RETAIL EXHAUST SHAFT
TO ROOF ABOVE
EXHAUST SHAFT -
SEE MECH.
EXHAUST SHAFT -
SEE MECH.
OVERHEAD COILING
DOOR
LEVEL ABOVE
TRASH
ELEV.
3
ELEV.
4
OFFICE OFFICE
MAILPARCEL LOCKERS
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MECH
WORK ROOM
A/V
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LOUNGE
"THE CUBE"
MECH. MECH.
JAN.MECH.
WOMEN MEN
MECH.MECH.
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MECH.A/V
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STOR.
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STOR.
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739.50 TOS
742.50 TOS
741.50 TOS
738.50 TOS
DS
DS
DS
DS
DS
DS
DS DSOVERSIZED
PACKAGESBORROWER'S
ROOOM
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GARAGE
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MP-BS1
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MP-12
MP-2
MP-3
MP-5
MP-6
MP-7
MP-8
MP-9
MP-10
MP-1
MP-A2
MP-4
MP-A1
MP-11
MP-13
TMP-3
TMP-1
TMP-2
H&H NO. AKR-007
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
SAMPLE LOCATION
MAP
LEVEL 1
WESTERN SECTIONSOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060FIGURE NO. 3
DEVELOPER:
KA LOSO INVESTMENTS
LLC
307 W. TREMONT AVENUE
SUITE 200
CHARLOTTE, NORTH CAROLINA
LEGEND
SLAB GRADE CHANGE
COLUMN AND FOOTING
OUTDOOR OR OPEN AIR SPACE
POUR-BACK AREAS
PROPOSED TOP OF SLAB ELEVATION (TOS). REFER TO STRUCTURAL
CONSTRUCTION DRAWINGS FOR FINAL ELEVATIONS.
MONITORING POINT
INDOOR AIR OR BACKGROUND (BAS) SAMPLE LOCATION
TEMPORARY POINT LOCATION (ABANDONED)
SUB-SLAB VAPOR SAMPLE LOCATION
WESTERN SECTION OF BUILDING
739.50 TOS
MP-5
IAS-5
SUB-SLAB SAMPLE
JANUARY 19, 2024
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
RETAIL A
RETAIL B
NORTH
RETAIL B
SOUTH
S:\AAA-Master Projects\Akridge (AKR)\AKR.007 LoSo Brownfields Implementation\VIMS Install\Western\Figures\VIMP Design_SamplingMap_Western.dwg

Appendix A
Historical Data Summary Tables and Sample Location Maps

Table 2Summary of Well Construction and Groundwater Elevation DataSouth and Hollis LoSoCharlotte, North CarolinaH&H Job No. AKR-006Well IDTOC Elevation (ft MSL)Ground Surface Elevation (ft)Total Well Depth (ft below TOC)Screen Length (ft) Static Depth to Groundwater (ft below TOC)Groundwater Elevation (ft below TOC)TMW-1 738.49 738.41 20 15 9.35 729.14TMW-2 741.28 741.41 20 15 11.51 729.77TMW-3 738.65 738.57 20 15 9.05 729.60TMW-4 740.50 740.42 20 15 10.90 729.60TMW-5 738.78 738.58 20 15 11.72 727.06TMW-6 739.75 738.67 20 15 10.42 729.33Notes:Depth to groundwater measurements collected on April 21, 2021. Temporary monitoring well top of casing (TOC) elevations were surveyed by H&H relative to known datums on April 22, 2021. TMW = temporary monitoring well; ft = feet; MSL = mean sea-levelhttps://harthick.sharepoint.com/sites/MasterFiles‐1/Shared Documents/AAA‐Master Projects/Akridge/AKR.006 LoSo Initial Brownfields/Brownfields Assessment/Report/Table/Data Tables_ABM.xlsx5/19/2021Table 2 (Page 1 of 1) Hart & Hickman, PC
Table 3 Summary of Groundwater Analytical DataSouth and Hollis LoSoCharlotte, North CarolinaH&H Job No. AKR-006Evaluation AreaUpgradient NortheasternUpgradient SouthwesternDowngradient - SouthernDowngradient - EasternSample IDTMW-1 TMW-2 TMW-3 TMW-5 TMW-6DateVOCs (8260D)Acetone16 J 7.8 J 23 J 7.4 J 7.1 J<2.4 <2.46,000 4,500,000 19,000,0002-Butanone (MEK)2.1 J 2.1 J 2.6 J<1.9 <1.9 <1.9 <1.94,000 450,000 1,900,000tert-Butyl Alcohol (TBA)6.2 J<5.37.9 J<5.3 <5.3 <5.3 <5.310NE NEsec-Butylbenzene<0.100.60 J<0.10 <0.10 <0.10 <0.10 <0.1070NE NEtert-Butylbenzene<0.0900.23 J<0.090 <0.090 <0.090 <0.090 <0.09070NE NEChloroform<0.19 <0.19 <0.191.1 J1.1 J2.2<0.1970 0.81 3.6Ethylbenzene<0.090 <0.090 <0.0900.24 J 0.25 J 0.17 J<0.090600NE NE2-Hexanone (MBK)2.5 J<1.42.5 J<1.4 <1.4 <1.4 <1.440 1,600 6,900Toluene0.12 J 0.61 J 1.7 3.6 3.7 2.6 0.96 J600 3,800 16,0001,2,4-Trimethylbenzene<0.100.17 J<0.10 <0.10 <0.10 <0.10 <0.10400 50 2101,3,5-Trimethylbenzene<0.102.4 J<0.10 <0.10 <0.10 <0.10 <0.10400 35 150Tetrachloroethylene<0.20 <0.20 <0.20 <0.20 <0.20 <0.202.10.7 12 48Trichloroethene<0.18 <0.18 <0.18 <0.18 <0.18 <0.180.44 J314m&p-Xylene<0.18 <0.180.45 J 1.3 J 1.2 J 0.83 J 0.33 J500 71 300o-Xylene<0.090 <0.0900.18 J 0.52 J 0.53 J 0.33 J 0.11 J500 98 410SVOCs (8270E)Acetophenone1.1 R-05, J<0.480.86 R-05, J<0.48 <0.48 <0.47 <0.47700 NE NEBis(2-ethylhexyl)phthalate<0.99 <0.99 <0.99 <0.98 <0.982.2 J<0.963NENEDibenzofuran1.0 J<0.36 <0.36 <0.36 <0.36 <0.35 <0.3528 NE NEDi-n-butylphthalate<0.53 <0.530.88 J 0.77 J 0.63 J<0.52 <0.52700 NE NEDiethylphthalate1.3 J<0.521.6 J 0.62 J<0.51 <0.50 <0.506,000 NE NE2-Methylnaphthalene<0.067 <0.067 <0.067 <0.0660.073 J<0.065 <0.06530 NE NEPhenol4.1 J<0.27 <0.27 <0.26 <0.26 <0.26 <0.2630 NE NEMetals (6020B/7470A)Arsenic<3.2 <3.2 <3.2 <3.2 <3.2 <3.2 <3.210-- --Barium75 62 120 41 41 32 35 700-- --Cadmium<0.19 <0.19 <0.19 <0.19 <0.19 <0.19 <0.192-- --Chromium<4.6 <4.6 <4.6 <4.6 <4.6 <4.6 <4.610-- --Lead<0.43 <0.43 <0.43 <0.43 <0.43 <0.43 <0.4315-- --Mercury<0.000050 <0.05 <0.05 <0.05 <0.05 <0.050.053 J 1 0.18 0.75Selenium<8.2 <8.2 <8.2 <8.2 <8.2 <8.2 <8.220-- --Silver<0.91 <0.91 <0.91 <0.91 <0.91 <0.91 <0.9120-- --Notes:1) North Carolina Department of Environmental Quality (DEQ) 15A NCAC 02L.0202 Groundwater Standards (2L Standards) dated April 20132) NC DEQ Division of Waste Management (DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs) dated January 2021Concentrations are reported in micrograms per liter (µg/L).Compound concentrations are reported to the laboratory method detection limits.Laboratory analytical methods are shown in parentheses.With the exception of metals, only constituents detected in at least one sample are shown.Bold values exceed the 2L Standard.Underlined values exceed the Residential GWSL. VOCs = volatile organic compounds; SVOCs = semi-volatile organic compundsNE = not established; -- = not applicable J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration. R-05 = Laboratory fortified blank duplicate relative percent difference is outside of control limits. Reduced precision is anticipated for reported value for this compound.Screening Criteria NC 2L Groundwater Standards(1)Non-Residential GWSLs(2)TWM-4 / GW-DUP4/21/2021 Residential GWSLs(2)Downgradient - Centralhttps://harthick.sharepoint.com/sites/MasterFiles‐1/Shared Documents/AAA‐Master Projects/Akridge/AKR.006 LoSo Initial Brownfields/Brownfields Assessment/Report/Table/Data Tables_ABM.xlsx5/20/2021Table 3 (Page 1 of 1) Hart & Hickman, PC
Table 4
Summary of Soil Gas Analytical Data
South and Hollis LoSo
Charlotte, North Carolina
H&H Job No. AKR-006
Evaluation Area
Sample ID SG-1 SG-3 SG-4 SG-5 SG-6 SG-7 SG-8 SG-9 SG-10
Sample Date
Sample Type
Units
VOCs (TO-15)
Acetone 14.6 43.1 30.2 21.3 <11.9 17.8 29.9 <11.9 14.6 16.8 16.9 220,000 2,700,000
Benzene <0.160 1.11 J 0.882 J <0.160 <3.19 1.37 J 1.42 J 13.0 J 1.11 J 1.09 J 2.36 12 160
2-Butanone (MEK)10.0 15.9 61.1 2.31 <5.90 3.58 3.79 <5.90 2.42 3.80 2.49 35,000 440,000
Carbon Disulfide <1.56 <1.56 <1.56 <1.56 47.5 J 22.4 17.0 50.8 6.74 13.2 17.2 4,900 6,100
Chloroform <0.264 2.04 J <0.264 <0.264 <5.27 3.97 2.45 <5.27 <0.264 2.13 1.32 J 4.1 53
Chloromethane <0.268 <0.268 <0.268 <0.268 <5.36 <0.268 <0.396 15.8 J <0.396 <0.268 <0.396 630 7,900
Cyclohexane <0.861 <0.861 1.81 J <0.861 <17.2 1.86 J <0.861 68.8 1.9 J 4.73 4.98 42,000 530,000
Dichlorodifluoromethane (Freon 12) 3.33 3.65 3.56 3.15 <8.20 5.51 4.04 <8.20 3.85 4.08 4.75 700 8,800
Ethyl Acetate <0.249 2.66 1.63 J 0.80 J <4.97 2.02 1.07 J <4.97 0.778 J 51.9 2.08 490 6,100
Ethylbenzene <0.187 7.62 4.61 <0.187 101 2.58 2.92 <3.73 2.09 J 3.96 4.39 37 490
4-Ethyltoluene <0.266 11.8 9.97 <0.266 <5.31 1.44 J 1.10 J <5.31 <0.266 <0.266 1.81 J NE NE
Heptane <0.193 6.82 2.96 <0.193 33.2 J 6.37 4.63 232 2.88 6.83 14.6 2,800 35,000
n-Hexane 0.708 J 5.21 1.74 J 1.29 J 34.3 J 3.55 2.16 8,780 1.51 J 153 5.22 4,900 61,000
2-Hexanone 1.54 J 63.4 26.5 <0.254 <5.08 3.08 1.18 J <5.08 0.868 J <0.254 <0.254 210 2,600
Isopropanol <0.167 4.40 J 2.73 J 6.34 B1 <3.34 5.49 B1 4.11 B1,J <3.34 4.95 B1 6.63 B1 3.97 B1,J 1,400 18,000
Methylene Chloride 0.969 J 1.37 J 0.813 J 1.64 J <7.63 1.18 J 1.18 J <7.63 1.76 3.09 1.64 J 3,400 53,000
4-Methyl-2-pentanone (MIBK)<0.254 17.3 11.2 <0.254 <5.08 <0.254 <0.254 <5.08 <0.254 <0.254 <0.254 21,000 260,000
Naphthalene 1.57 J 6.1 3.74 <0.386 <7.72 1.81 J 1.64 J <7.72 <0.386 <0.386 1.75 J 2.8 36
Propene <0.139 5.46 <0.139 3.71 <2.79 <0.139 <0.139 754 <0.139 15.9 5.65 21,000 260,000
1,1,2,2-Tetrachloroethane <0.281 <0.281 <0.281 <0.281 <5.62 <0.281 <0.281 30.3 <2.81 <0.281 <0.281 1.6 21
Tetrachloroethylene <0.441 <0.441 <0.441 <0.441 <8.81 <0.441 77.1 <8.81 <0.441 1.52 J 1.38 J 280 35,000
Tetrahydrofuran 1.24 J 1.14 J 4.2 <0.209 <4.19 <0.209 <0.209 <4.19 <0.209 <0.209 <0.209 14,000 180,000
Toluene 2.10 38.3 19.5 3.97 6,370 18.2 21.5 40 16.9 114 35.8 35,000 440,000
Trichloroethylene <0.274 <0.274 <0.274 <0.274 <5.48 <0.274 <0.274 <5.48 <0.274 1.41 J <0.274 14 180
Trichlorofluoromethane (Freon 11)2.06 J <0.433 <0.433 <0.433 <8.66 2.94 <0.433 41.1 J <0.433 <0.433 <0.433 NE NE
1,2,4-Trimethylbenzene 2.41 J 44.1 38.3 <0.295 <5.90 2.94 4.23 <5.90 4.12 <5.90 5.98 420 5,300
1,3,5-Trimethylbenzene <0.261 10.7 9.14 <0.261 <5.21 4.59 1.03 J <5.21 1.02 J <5.21 1.42 J 420 5,300
Xylenes (total)1.77 J 44.8 29.5 1.29 J 495 12.5 14.2 <3.65 11.4 495 20.1 700 8,800
Notes:
1) North Carolinia Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Vapor Intrusion Soil Gas Screening Levels (SGSLs) dated January 2021
Concentrations are reported in micrograms per cubic meter (µg/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 above table.
Bold values indicates an exceedance of DWM Residential Vapor Intrusion SGSL.
B1 = Analyte detected in laboratory-prepared method blank
J = Compound was detected above the laboratory method detction limit, but below the laboratory reporting limit resulting a laboratory estimated concentration.
NE = Not Established; VOCs = Volatile Organic Compounds
Proposed Retail or Amenity Space
4/23/2021
µg/m3
Exterior Soil Gas
4/22/2021
Proposed Residential Apartments
SG-2 / SG-DUP Screening Criteria
Residential
SGSLs (1)
Non-Residential
SGSLs (1)
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Akridge/AKR.006 LoSo Initial Brownfields/Brownfields Assessment/Report/Table/Data Tables_ABM.xlsx
5/24/2021
Table 4 (Page 1 of 1)
Hart & Hickman, PC
USGS The National Map: National Boundaries Dataset, 3DEP Elevation
Program, Geographic Names Information System, National Hydrography
Dataset, National Land Cover Database, National Structures Dataset,
and National Transportation Dataset; USGS Global Ecosystems; U.S.
Census Bureau TIGER/Line data; USFS Road Data; Natural Earth Data;
U.S. Department of State Humanitarian Information Unit; and NOAA
National Centers for Environmental Information, U.S. Coastal Relief
Model. Data refreshed May, 2020.
SITE LOCATION MAP
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINA
DATE: 3-8-21
JOB NO: AKR-006
REVISION NO: 0
FIGURE. 1
2923 South Tryon Street - Suite 100
Charlotte, North Carolina 28203
704-586-0007 (p) 704-586-0373 (f)
License # C-1269 / # C-245 Geology
TITLE
PROJECT
0 2,000 4,000
SCALE IN FEET
Path: \\HHFS01\Redirectedfolders\sperry\My Documents\ArcGIS\PROJECTS\AKR-006\Figure 1.mxdN
U.S.G.S. QUADRANGLE MAP
CHARLOTTE EAST, NORTH CAROLINA 2013
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
SITE
REVISION NO. 0
JOB NO. AKR-006
DATE: 5-18-21
FIGURE NO. 2
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINA
SITE MAP
LEGEND
BROWNFIELDS PROPERTY
BOUNDARY
PARCEL BOUNDARY LINE
APPROXIMATE LOCATION OF
TRENCH DRAIN
STORM DRAIN
APPROXIMATE LOCATION OF A
HEATING OIL UST
PROPANE AST
APPROXIMATE EXTENT OF HEAVY
OIL STAINING
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
H
O
L
L
I
S

R
O
A
D
VACANT
LAND
MULTI-TENANT RETAIL
(3609 SOUTH BOULEVARD)
RESIDENTIAL
RESIDENTIAL
WESTON STREETSOUTH BOULEVARDSOUTH BOULEVARDH
A
R
T
F
O
R
D

A
V
E
N
U
E
VACANT COMMERCIAL
(3601 SOUTH BOULEVARD)
MASTER AUTO COLLISION
(3411 SOUTH BOULEVARD)
NOTES:
1.PARCEL DATA AND AERIAL IMAGERY OBTAINED FROM
MECKLENBURG COUNTY GIS, 2020.
2.UST = UNDERGROUND STORAGE TANK
3.AST = ABOVEGROUND STORAGE TANK
SATTO TIRES
(3407 SOUTH BOULEVARD)
OFFICES
OFFICE AND
STORE LOBBY
LAWN EQUIPMENT
REPAIR SHOP
AUTO PAINTING
SHOP
PAINT
BOOTH
STORAGE
VACANT
LAND
UNLABELED 55-GALLON
DRUM STORAGE
APPROXIMATE
EXTENT OF SOIL
STOCKPILE
FORMER GAS STATION
(1963 SANBORN MAP)
UNIDENTIFIED STORES
(1963 SANBORN MAP)
FORMER SPRAY PAINT BOOTH
(963 SANBORN MAP)
APPROXIMATE
LOCATION OF FORMER
SEPTIC OR GRIT TANK
S:\AAA-Master Projects\Akridge\AKR.006 LoSo Initial Brownfields\Brownfields Assessment\Figures\Site Map.dwg, FIG.2, 5/18/2021 12:20:08 PM, sperry
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Site Wide Soil Gas - Hypothetical Worst Case
North Carolina Department of Environmental Quality
Risk Calculator
South and Hollis LoSo
South Boulevard and Hollis Road, Charlotte, Mecklenburg County
Division of Waste Management - Brownfields Program
24062-20-060
January 2021
November 2020 EPA RSL Table
Prepared By:John Lopez, PG
Matt Bramblett, PE
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
Note: Risk output will only be calculated for complete exposure pathways.
Receptor Pathway
Check box if
pathway
complete
Soil
Groundwater Use
Soil
Groundwater Use
Construction Worker Soil
Soil
Surface Water
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Groundwater to Indoor Air
Soil Gas to Indoor Air
Indoor Air
Source Soil
Source Groundwater
Source Soil
Source Groundwater
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: January 2021Basis: November 2020 EPA RSL TableSite ID: 24062-20-060Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst CaseDescription of Exposure Point Concentration Selection:Exposure Point Concentration (ug/m3)Notes: CAS Number ChemicalMinimum Concentration (Qualifier)Maximum Concentration (Qualifier)UnitsLocation of Maximum ConcentrationDetection FrequencyRange of Detection LimitsConcentration Used for ScreeningBackground ValueScreening Toxicity Value (Screening Level) (n/c)Potential ARAR/TBC ValuePotential ARAR/TBC SourceCOPC Flag (Y/N)Rationale for Selection or Deletion43.1 67-64-1 Acetoneug/m313 71-43-2 Benzeneug/m350.8 75-15-0 Carbon Disulfideug/m33.97 67-66-3 Chloroformug/m315.8 74-87-3 Chloromethaneug/m368.8 110-82-7 Cyclohexaneug/m35.51 75-71-8 Dichlorodifluoromethaneug/m351.9 141-78-6 Ethyl Acetateug/m3101 100-41-4 Ethylbenzeneug/m34.2 109-99-9 ~Tetrahydrofuranug/m3232 142-82-5 Heptane, N-ug/m38780 110-54-3 Hexane, N-ug/m363.4 591-78-6 Hexanone, 2-ug/m36.63 67-63-0 Isopropanolug/m315.9 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m317.3 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m33.09 75-09-2 Methylene Chlorideug/m36.1 91-20-3 ~Naphthaleneug/m3754 115-07-1 Propyleneug/m330.3 79-34-5 Tetrachloroethane, 1,1,2,2-ug/m377.1 127-18-4 Tetrachloroethyleneug/m36370 108-88-3 Tolueneug/m31.41 79-01-6 Trichloroethyleneug/m341.1 75-69-4 Trichlorofluoromethaneug/m344.1 95-63-6 Trimethylbenzene, 1,2,4-ug/m310.7 108-67-8 Trimethylbenzene, 1,3,5-ug/m3495 1330-20-7 Xylenesug/m3Input Form 2DSoil Gas Exposure Point Concentration TableNote: 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.If 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 calculationsNorth Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
Receptor Pathway
Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use* NC NC NC
Soil NC NC NC
Groundwater Use* NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water* NC NC NC
Receptor Pathway
Carcinogenic
Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 2.6E-05 8.3E-01 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 2.0E-06 6.6E-02 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
3. NM = Not Modeled
4. NC = Pathway not calculated
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
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.
Notes:
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 43.1 1.293 - 6.5E+03 4.0E-05
71-43-2 Benzene 13 0.39 3.6E-01 6.3E+00 1.1E-06 1.2E-02
75-15-0 Carbon Disulfide 50.8 1.524 - 1.5E+02 2.1E-03
67-66-3 Chloroform 3.97 0.1191 1.2E-01 2.0E+01 9.8E-07 1.2E-03
74-87-3 Chloromethane 15.8 0.474 - 1.9E+01 5.1E-03
110-82-7 Cyclohexane 68.8 2.064 - 1.3E+03 3.3E-04
75-71-8 Dichlorodifluoromethane 5.51 0.1653 - 2.1E+01 1.6E-03
141-78-6 Ethyl Acetate 51.9 1.557 - 1.5E+01 2.1E-02
100-41-4 Ethylbenzene 101 3.03 1.1E+00 2.1E+02 2.7E-06 2.9E-03
109-99-9 ~Tetrahydrofuran 4.2 0.126 - 4.2E+02 6.0E-05
142-82-5 Heptane, N- 232 6.96 - 8.3E+01 1.7E-02
110-54-3 Hexane, N- 8780 263.4 - 1.5E+02 3.6E-01
591-78-6 Hexanone, 2- 63.4 1.902 - 6.3E+00 6.1E-02
67-63-0 Isopropanol 6.63 0.1989 - 4.2E+01 9.5E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone) 15.9 0.477 - 1.0E+03 9.1E-05
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone) 17.3 0.519 - 6.3E+02 1.7E-04
75-09-2 Methylene Chloride 3.09 0.0927 1.0E+02 1.3E+02 9.1E-10 1.5E-04
91-20-3 ~Naphthalene 6.1 0.183 8.3E-02 6.3E-01 2.2E-06 5.8E-02
115-07-1 Propylene 754 22.62 - 6.3E+02 7.2E-03
79-34-5 Tetrachloroethane, 1,1,2,2- 30.3 0.909 4.8E-02 -1.9E-05
127-18-4 Tetrachloroethylene 77.1 2.313 1.1E+01 8.3E+00 2.1E-07 5.5E-02
108-88-3 Toluene 6370 191.1 - 1.0E+03 3.7E-02
79-01-6 Trichloroethylene 1.41 0.0423 4.8E-01 4.2E-01 8.8E-08 2.0E-02
75-69-4 Trichlorofluoromethane 41.1 1.233 - -
95-63-6 Trimethylbenzene, 1,2,4- 44.1 1.323 - 1.3E+01 2.1E-02
108-67-8 Trimethylbenzene, 1,3,5- 10.7 0.321 - 1.3E+01 5.1E-03
1330-20-7 Xylenes 495 14.85 - 2.1E+01 1.4E-01
Cumulative: 2.6E-05 8.3E-01
All concentrations are in ug/m3
Output Form 3B
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.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: January 2021
Basis: November 2020 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Site Wide Soil Gas - Hypothetical Worst Case
CAS # Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air
Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 43.1 0.431 - 2.7E+04 3.2E-06
71-43-2 Benzene 13 0.13 1.6E+00 2.6E+01 8.3E-08 9.9E-04
75-15-0 Carbon Disulfide 50.8 0.508 - 6.1E+02 1.7E-04
67-66-3 Chloroform 3.97 0.0397 5.3E-01 8.6E+01 7.4E-08 9.2E-05
74-87-3 Chloromethane 15.8 0.158 - 7.9E+01 4.0E-04
110-82-7 Cyclohexane 68.8 0.688 - 5.3E+03 2.6E-05
75-71-8 Dichlorodifluoromethane 5.51 0.0551 - 8.8E+01 1.3E-04
141-78-6 Ethyl Acetate 51.9 0.519 - 6.1E+01 1.7E-03
100-41-4 Ethylbenzene 101 1.01 4.9E+00 8.8E+02 2.1E-07 2.3E-04
109-99-9 ~Tetrahydrofuran 4.2 0.042 - 1.8E+03 4.8E-06
142-82-5 Heptane, N- 232 2.32 - 3.5E+02 1.3E-03
110-54-3 Hexane, N- 8780 87.8 - 6.1E+02 2.9E-02
591-78-6 Hexanone, 2- 63.4 0.634 - 2.6E+01 4.8E-03
67-63-0 Isopropanol 6.63 0.0663 - 1.8E+02 7.6E-05
78-93-3 Methyl Ethyl Ketone (2-Butanone) 15.9 0.159 - 4.4E+03 7.3E-06
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone) 17.3 0.173 - 2.6E+03 1.3E-05
75-09-2 Methylene Chloride 3.09 0.0309 1.2E+03 5.3E+02 2.5E-11 1.2E-05
91-20-3 ~Naphthalene 6.1 0.061 3.6E-01 2.6E+00 1.7E-07 4.6E-03
115-07-1 Propylene 754 7.54 - 2.6E+03 5.7E-04
79-34-5 Tetrachloroethane, 1,1,2,2- 30.3 0.303 2.1E-01 -1.4E-06
127-18-4 Tetrachloroethylene 77.1 0.771 4.7E+01 3.5E+01 1.6E-08 4.4E-03
108-88-3 Toluene 6370 63.7 - 4.4E+03 2.9E-03
79-01-6 Trichloroethylene 1.41 0.0141 3.0E+00 1.8E+00 4.7E-09 1.6E-03
75-69-4 Trichlorofluoromethane 41.1 0.411 - -
95-63-6 Trimethylbenzene, 1,2,4- 44.1 0.441 - 5.3E+01 1.7E-03
108-67-8 Trimethylbenzene, 1,3,5- 10.7 0.107 - 5.3E+01 4.1E-04
1330-20-7 Xylenes 495 4.95 - 8.8E+01 1.1E-02
Cumulative: 2.0E-06 6.6E-02
All concentrations are in ug/m3
Output Form 3E
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.
North Carolina DEQ Risk Calculator

Appendix B
As-Built Drawings (dated January 19, 2024)
EVVVVVVVVVVVANVC
V
C
V
C
V
C
V
CVVVVVVVVANEVVANFTVANFTCVCVCVCVVVFTFTVVVFTCVVVC
V
CVVCCVUP
DN
UP
DN
UP
4.1% SLOPEDN3.7% SLOPEDN2.0% SLOPE (MAX.)UP 6.5% SLOPEUPDNDNA5.0-MHC
C3.0-M1
A3.0-M1
A4.0-M1
CORRIDOR
A5.0-M1
A5.0-M1
B2.0-M1
A4.0-M1
A4.0-M1
B2.0-M1
A1.0-M1
A1.0-M1
B2.0-M1
A3.0-M1
A3.0-M1
A3.0-M1
A4.0-M2
ELEC.
STOR.CHEMSTOR.POOL
EQ
ELEC./IDF
A5.0-M4 A5.0-M5
A1.0-M3 A1.0-M3 A1.0-M3
RETAIL
B
RETAIL
A
PET SPA
B2.0-M1
A5.0-M2
A1.0-M1
A4.0-M3
B2.0-M1A1.0-M1
A1.0-M3
ELEC.
A3.0-M2
A1.0-M2
A1.0-M2
STOR.
MECH.
MAIN
ELEC.
MECH.
STAIR 3
CORRIDOR
740.50 TOS
740.50 TOS
738.00 TOS
738.85 TOS
739.20 TOS
739.50 TOS
POOL
COURTYARD
RESIDENT
TRASH
RETAIL
TRASH
MAINTENANCE
CYCLE
CENTERSTAIR 1
GARAGE
ELEV.
LOBBY
STAIR 2
ELEV.
1
ELEV.
2
RETAIL
B ELEC.741.00 TOS
741.65 TOS
739.00 TOS
RETAIL EXHAUST SHAFT
TO ROOF ABOVE
EXHAUST SHAFT -
SEE MECH.
EXHAUST SHAFT -
SEE MECH.
OVERHEAD COILING
DOOR
LEVEL ABOVE
TRASH
ELEV.
3
ELEV.
4
OFFICE OFFICE
MAILPARCEL LOCKERS
LEASING
MECH
WORK ROOM
A/V
LIBRARY /
RIDESHARE
LOUNGE
"THE CUBE"
MECH.MECH.
JAN.MECH.
WOMEN MEN
MECH.MECH.
CLUB
FITNESSGAME ROOM YOGA
MECH.A/V
HC
STOR.
HC
STOR.
BACKFLOW/SPRINKLER
EXIT
PASSAGEWAY
10' X 25' LOADING
SPACE
A5.0-M3
739.50 TOS
742.50 TOS
741.50 TOS
738.50 TOS
DS
DS
DS
DS
DS
DS
DS DSOVERSIZED
PACKAGESBORROWER'S
ROOOM
COWORK
GARAGE
STAIR 4
CALIFORNIA GATES
& PEDESTRIAN GATE
RETAIL
A ELEC
MECH.
C4.0-M1
FITNESS
2% CROSS SLOPE
MAX
UP
STOR.
RETAIL
DATA
MP-BS1
MP-BN1
MP-12
MP-2
MP-3
MP-5
MP-6
MP-7
MP-8
MP-9
MP-10
MP-1
MP-A2
MP-4
MP-A1
MP-11
MP-13
F-A1
F-A2
F-BN1
F-BS1
F-1
F-3
F-4
F-5
F-6
F-7
F-2
F-9
TMP-3
TMP-1
TMP-2
H&H NO. AKR-007
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
PLAN VIEW LAYOUT
LEVEL 1
AS-BUILTS -
WESTERN SECTIONSOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060VM-1
PROFESSIONAL
APPROVAL
MP-4
DEVELOPER:
KA LOSO INVESTMENTS
LLC
307 W. TREMONT AVENUE
SUITE 200
CHARLOTTE, NORTH CAROLINA
F-7
739.50 TOS
JANUARY 19, 2024
45-DEGREE ELBOW, TYP
45-DEGREE ELBOW, TYP
90-DEGREE
ELBOW, TYP
PVC TEE
FITTING, TYP
PVC WYE, TYP
45-DEGREE ELBOW, TYP
THICKENED SLAB INSTALLED FOR
GRAVEL CUT-OFF BETWEEN FINISHED
AND POUR-BACK AREAS (SEE DETAIL
8/VM-2)
LEGEND
SLAB GRADE CHANGE
THICKENED SLAB
COLUMN AND FOOTING
OUTDOOR OR OPEN AIR SPACE
POUR-BACK AREAS
WESTERN SECTION OF BUILDING (REMAINING BUILDING
REFERRED TO AS EASTERN SECTION)
PROPOSED TOP OF SLAB ELEVATION (TOS).
REFER TO STRUCTURAL CONSTRUCTION
DRAWINGS FOR FINAL ELEVATIONS.
EXTENT OF VAPOR LINER
HORIZONTAL COLLECTION PIPING
3" DIA SCH 40 SOLID PVC PIPE
4D/24
12
VM-2A
3/24
9
VM-2
1
VM-2
4A/24
9
VM-2
4A/24
4A/24
3/24
3/24
15
VM-2A
15
VM-2A
2
VM-2
2
VM-2
2
VM-2
10
VM-2
13
VM-2A
12
VM-2A
13
VM-2A
5
VM-2
17
VM-2A
18
VM-2A
4D/24
4A/24
22
VM-2A
22
VM-2A
13
VM-2A
2
VM-2
8
VM-2
19
VM-2A
6
VM-2
6
VM-2
7
VM-2
7
VM-2
20
VM-2A
21
VM-2A
22
VM-2A
1
VM-2
1
VM-2
1
VM-2
4B/24
VM-2/2A
10
VM-2
12
VM-2A
17
VM-2A
19
VM-2A
19
VM-2A
5
VM-2
4C/24
5
VM-2
4E/24
21
VM-2A
21
VM-2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
VM-2/2A
21
VM-2A
21
VM-2A
23
VM-2A
23
VM-2A
VM-2A
23
4" DIA SCH 40 SOLID PVC VERTICAL RISER WITH
FAN IDENTIFICATION NUMBER (REFER TO DETAIL
NUMBER 24 ON SHEET VM-2A)
2" DIA SOLID PVC PRESSURE MONITORING POINT
WITH FLUSH-MOUNTED COVER (INTAKE POSITIONED
MINIMUM 5-FT FROM EXTERIOR FOOTING)
TEMPORARY MONITORING POINT
(INTAKE POSITIONED MINIMUM 5-FT FROM EXTERIOR
FOOTING; ABANDONED FOLLOWING EFFICACY TESTING)
01/19/24
AREA DOES NOT
CONNECT TO UPPER
OCCUPIABLE SPACES
S:\AAA-Master Projects\Akridge (AKR)\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMS As-Builts AKR.007_Western.dwg
VAPOR BARRIER AND BASE COURSE (TYPICAL)1
BASE COURSE - CLEAN #57 STONE
MIN 5" THICK BENEATH VAPOR BARRIER (SEE
SPECIFICATIONS)
VAPOR BARRIER (SEE SPECIFICATIONS)
CONCRETE FLOOR SLAB
SUBBASE
NTSVM-2
SLOTTED COLLECTION PIPE (TYPICAL)2
3" SCH 40 THREADED FLUSH JOINT
PERFORATED PVC PIPE SET WITHIN
MIN 5" BASE COURSE (SEE
SPECIFICATIONS)
VAPOR BARRIER (SEE SPECIFICATIONS}
SUBBASE
NTS
CONCRETE FLOOR SLAB
VM-2
PVC ENDCAP WITH
APPROX. 3 - 1/4" HOLES
DRILLED
BASE COURSE
SUB-BASE
VIMS AT SLAB ON GRADE WITH RISER DUCT PIPING (TYP)
NTS
3
VM-2
SOLID 3" SCH 40 PVC
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
VAPOR LINER
SOLID TO PERFORATED 3" SCH
40 PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATIONS)WALL (VARIES)
3" SCH 40 PVC TEE
4" TO 3" SCH 40
PVC REDUCER
VIMS AT VERTICAL RISERS WITH 90 DEGREE ELBOW (TYP)
NTS
4A
VM-2
BASE COURSE
SUB-BASE
PERFORATED 3" SCH 40
PVC
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS VAPOR LINER
4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATIONS)WALL (VARIES)
4" SCH 40 PVC
90-DEGREE ELBOW4" TO 3" SCH 40
PVC REDUCER
CONCRETE
FLOOR SLAB
BASE COURSE
SUB-BASE
VIMS PIPING THROUGH THICKENED SLAB (TYP)
NTS
5
VM-2
SOLID 3"
SCH 40 PVC
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
PROVIDE PIPE SUPPORT TO PREVENT
LOW POINT IN SOLID PIPE. MAINTAIN 1%
SLOPE TOWARD SLOTTED SECTION OF
PIPE (SEE SPECIFICATION)
VAPOR LINER
SOLID TO PERFORATED 3" SCH
40 PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
VAPOR LINER BENEATH
GRADE BEAM
WALL (VARIES)
PIPE SLEEVE
3" SCH 40 PVC PIPE
(IF PRESENT)
VIMS VAPOR LINER AT EXTERIOR THICKENED SLAB (TYP)
NTS
6
VM-2
VAPOR LINER
SOIL SUB-BASE. GRAVEL BETWEEN OPEN
AIR PARKING GARAGE AND OCCUPIED
SPACE WAS DISCONTINUOUS WITH
MINIMUM 1-FT OF SOIL IN HORIZONTAL
DIRECTION BETWEEN GRAVEL LAYERS
(SEE SPECIFICATIONS)
WALL (VARIES)
OPEN AIR
PARKING GARAGEOCCUPIED SPACE
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURERS INSTRUCTIONS (TYP)
MINIMUM 5" THICKENED SLAB THICKNESS
VAPOR LINER TERMINATED AT
SOIL GRADE, WHERE APPLICABLE
VIMS AT DEPRESSIONS IN SLAB-ON-GRADE (TYP)
NTS
8
VM-2
CONCRETE FLOOR SLAB
SUBBASEVAPOR LINER
BASE COURSE
VIMS PIPING THROUGH DEPRESSIONS IN SLAB-ON-GRADE (TYP)
NTS
9
VM-2
SUB-BASE
CONCRETE FLOOR SLAB
VAPOR LINER
BASE COURSE
SOLID TO PERFORATED 3" SCH
40 PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
3" SCH 40 PVC
45-DEGREE ELBOW
VAPOR LINER SEALED TO
PIPE PER MANUFACTURER
INSTRUCTIONS
SOLID 3" SCH 40 PVC
(SEE SPECIFICATIONS)
PIPE SLEEVE
(SEE SPECIFICATIONS)
WALL (VARIES)
WALL (VARIES)
BASE COURSESUB-BASE
VAPOR LINER
WALL (VARIES)
VAPOR BARRIER AT SLAB EDGE10
NTSVM-2
WALL (VARIES)
BASE COURSE
SUB-BASE
VAPOR LINER
OPEN AIR PATIO /
TERRACE
VAPOR LINER EXTENDED TO
EXTERIOR SIDE OF FOOTER NO MORE
THAN 6-INCHES BELOW FINISHED
GRADE WHERE POSSIBLE
VAPOR LINER
TERMINATED AT SOIL
GRADE, WHERE
APPLICABLE
VIMS AT EXTERIOR FOOTING (TYP)
NTSVM-2
7
CONCRETE FLOOR SLAB
VAPOR LINER SEALED TO CONCRETE
PER MANUFACTURERS INSTRUCTIONS
VAPOR LINER
BASE COURSE
SUB-BASE
WALL (VARIES)
VAPOR LINER EXTENDED TO EXTERIOR SIDE
OF FOOTER NO MORE THAN 6-INCHES BELOW
FINISHED GRADE WHERE POSSIBLE
EXTERIOR GRADE
(VARIES)
VIMS AT RETAINING WALL WITH RISER PIPE (TYP)
NTS
4D
VM-2
OPEN AIR SPACE
OCCUPIED
SPACE
SUB-BASE
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 16/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
SOLID TO PERFORATED 3" SCH 40 PVC
PIPE TRANSITION (SLIP COUPLING OR
THREADED JOINT)
VAPOR LINER SEALED TO
PIPE PER MANUFACTURER
INSTRUCTIONS
4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATIONS)
4" SCH 40 PVC
90-DEGREE ELBOW
4" TO 3" SCH 40 PVC REDUCER
4" TO 3" SCH 40 PVC REDUCER
VIMS PIPING THROUGH SLAB DROP WITH RISER DUCT PIPING (TYP)
NTS
4B
VM-2
SUB-BASE
VAPOR LINER
BASE COURSE
SOLID TO PERFORATED 3" SCH 40
PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
3" SCH 40 PVC
90-DEGREE ELBOW
VAPOR LINER SEALED TO PIPE
PER MANUFACTURER
INSTRUCTIONS
WALL (VARIES)
SOLID 4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATIONS)
3" SCH 40 PVC
90-DEGREE TEE
PIPE SLEEVE
(SEE SPECIFICATIONS)
VIMS AT RETAINING WALL ADJACENT TO OPEN AIR SPACE (TYP)
NTS
4C
VM-2
INTERIOR SPACE
OPEN AIR SPACE
SUB-BASE
BASE COURSE
VAPOR LINER
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
SOLID TO PERFORATED 3" SCH 40 PVC PIPE
TRANSITION (SLIP COUPLING OR THREADED JOINT)
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
4" SCH 40 PVC
90-DEGREE ELBOW
4" TO 3" SCH 40 PVC REDUCER
SLP.
VIMS AT RAMP (TYP)
NTS
11
VM-2
VAPOR LINERCONCRETE FLOOR SLAB
SUB-BASE
SLOTTED 3-INCH
SCH 40 PIPEBASE COURSE
VIMS RISER AT RIBBON SLAB EDGE (TYP)
NTS
4E
VM-2
SUB-BASE
CONCRETE FLOOR SLAB
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED OUTSIDE OF
CONCRETE COLUMN PER
MANUFACTURER INSTRUCTIONS
SOLID TO PERFORATED 3" SCH 40 PVC
PIPE TRANSITION (SLIP COUPLING OR
THREADED JOINT)
4" TO 3" SCH 40 PVC REDUCER
VAPOR LINER SEALED TO
PIPE PER MANUFACTURER
INSTRUCTIONS
4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATIONS)
RESIDENT
TRASHMAIN ELEC.
PIPE
SLEEVE
H&H NO. AKR-007
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
CROSS-SECTION
DETAILS #1-11
AS-BUILTS -
WESTERN SECTION
DEVELOPER:
KA LOSO INVESTMENTS
LLC
307 W. TREMONT AVENUE
SUITE 200
CHARLOTTE, NORTH CAROLINA
VM-2
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALE
ALL PIPE MEASUREMENTS ARE BY DIAMETER SOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060PROFESSIONAL
APPROVAL
JANUARY 19, 2024
01/19/24
S:\AAA-Master Projects\Akridge (AKR)\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMS As-Builts AKR.007_Western.dwg
FINISHED FLOOR SLAB
2" SCH 40 PVC SET WITHIN GRAVEL LAYER
2" DRAIN EXPANSION TEST PLUG
VIMS MONITORING POINT - TYPICAL DETAIL VIEW
NTS
21
VM-2A
VAPOR BARRIER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
2" SCH 40 PVC 90 DEGREE ELBOW
FLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURN
INDUSTRIES MODEL #CO2450-PV4 FLUSH WITH
FINISHED FLOOR
BASE COURSE
4" x 2" FLUSH REDUCER
BUSHING
OPEN-ENDED PIPE
VIMS AT RETAINING WALL ADJACENT TO OCCUPIED SPACE (TYP)
NTS
17
VM-2A
OPEN AIR SPACE
OCCUPIED SPACE
SUB-BASE
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 16/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
15
NTSVM-2A
VIMS AT ELEVATOR PIT (TYP)
CONTINUOUS VAPOR LINER
SEALED PER MANUFACTURER
INSTRUCTIONS
SUMP PIT
SUB-BASE
BASE COURSE
VAPOR LINER
CONTINUOUS 60-MIL
WATERPROOFING MEMBRANE
(SEE SPECIFICATIONS)
SEE DETAIL 16/VM-2A
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 17/VM-2A)
VIMS AT RETAINING WALL ADJACENT TO ENCLOSED SPACE (TYP)
NTS
18
VM-2A
OCCUPIED SPACE
OCCUPIED SPACE
SUB-BASE
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 16/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
BASE COURSE
FLOOR CLEANOUT, ADJUSTABLE,
4" DIA ZURN INDUSTRIES
MODEL #CO2450-PV4 - SEE DETAIL
21/VM-2FLUSH WITH
FINISHED FLOOR
22
NTSVM-2A
VIMS MONITORING POINT WITH EXTENDED INTAKE PIPE
VAPOR LINER
2" SOLID SCH 40 PVC
LENGTH VARIES - REFER
TO SHEET VM-1
2" SCH 40 PVC 90-DEGREE
ELBOW VAPOR LINER PENETRATION
SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
WALL (VARIES)
OPEN-ENDED PIPE
VIMS TURBINE VENTILATOR FAN & EXHAUST (TYP)24
NTS
TURBINE VENTILATOR FAN
(EMPIRE MODEL TV04SS OR ENGINEER
APPROVED EQUIVALENT)
OUTDOOR-RATED ELECTRICAL JUNCTION BOX FOR
POTENTIAL FUTURE VACUUM FAN (REFER TO
SPECIFICATIONS)
RISER DUCT PIPE THROUGH ROOF
FLASHING
ROOFTOP
VM-2A
HEAVY DUTY NO-HUB RUBBER
COUPLING
16
VM-2A
SOIL SUB-BASE
VAPOR LINER
DRAINAGE MAT
(IF PRESENT)
CONCRETE
NTS
VIMS AT ELEVATOR PIT - WATERPROOFING DETAIL (TYP)
CONTINUOUS 60-MIL
WATERPROOFING MEMBRANE
(SEE SPECIFICATIONS)
VAPOR LINER
BENEATH THICKENED SLAB
VAPOR BARRIER AT STAIR THICKENED SLAB20
NTS
STAIR STRINGER
SUBBASE
BASE COURSE
VM-2A
CONCRETE FLOOR
SLABVAPOR LINER
VIMS AT EXTERIOR COLUMN (TYP)
NTS
13
VM-2A
SUB-BASE
CONCRETE
FLOOR SLAB
BASE COURSE
VAPOR LINER
CIP CONCRETE COLUMN
VAPOR LINER SEALED
TO CONCRETE PER
MANUFACTURERS
INSTRUCTIONS
SEE DETAIL 14/VM-2ACOLUMN BLOCKOUT
VAPOR LINER SEALED
TO CONCRETE ON
EACH SIDE OF COLUMN
VIMS AT INTERIOR COLUMN (TYP)
NTS
12
VM-2A
SUB-BASE
CONCRETE FLOOR SLAB
BASE COURSE
VAPOR LINER
CIP CONCRETE COLUMN
CONCRETE FOOTING
VAPOR LINER SEALED OUTSIDE OF
CONCRETE COLUMN PER
MANUFACTURER INSTRUCTIONS
SEE DETAIL 14/VM-2A
VAPOR LINER SEALED
TO CONCRETE ON
EACH SIDE OF COLUMN
VIMS AT COLUMNS - EXPANSION DETAIL (TYP)
NTS
14
VM-2A
CIP CONCRETE COLUMN
CONCRETE FLOOR SLAB
VAPOR LINER SEALED TO CONCRETE
PER MANUFACTURERS INSTRUCTIONS
COLUMN EXPANSION FORM
(INSTALLED OVER VAPOR LINER)
VAPOR LINER
VIMS AT SLAB ON GRADE FOLD WITH PIPE CONNECTION (TYP)
NTS
19
VM-2A
OCCUPIED SPACE
OCCUPIED SPACE
SUB-BASE
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED TO OUTSIDE OF CONCRETE
AND WATERPROOFING MEMBRANE (WHERE
PRESENT) PER MANUFACTURER INSTRUCTIONS
(SEE DETAIL 16/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
SOLID TO PERFORATED 3" SCH 40
PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
3" SCH 40 PVC
90-DEGREE ELBOW
VAPOR LINER SEALED TO PIPE
PER MANUFACTURER
INSTRUCTIONS
3" SCH 40 PVC
45-DEGREE ELBOW
PIPE SLEEVE
23
NTS
VAPOR BARRIER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
1" SCH 40 PVC 90 DEGREE ELBOW
OPEN ENDED PIPE
BASE COURSE
(SEE SPECIFICATIONS)
TEMPORARY MONITORING POINT (TYPICAL)
1" SOLID SCH 40 PVC
TEST PLUG (1" PIPE SIZE)
PIPE SET FLUSH WITH SLAB OR
EXTENDED MORE THAN 6" ABOVE
SLAB (SEE SPECIFICATIONS).
VM-2A
H&H NO. AKR-007
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
CROSS-SECTION
DETAILS #12-24
AS-BUILTS -
WESTERN SECTION
DEVELOPER:
KA LOSO INVESTMENTS
LLC
307 W. TREMONT AVENUE
SUITE 200
CHARLOTTE, NORTH CAROLINA
VM-2A
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALE
ALL PIPE MEASUREMENTS ARE BY DIAMETER SOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060PROFESSIONAL
APPROVAL
2
JANUARY 19, 2024
01/19/24
S:\AAA-Master Projects\Akridge (AKR)\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMS As-Builts AKR.007_Western.dwg
H&H NO. AKR-007
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
SPECIFICATIONS
AS-BUILTS -
EASTERN SECTION
DEVELOPER:
KA LOSO INVESTMENTS
LLC
307 W. TREMONT AVENUE
SUITE 200
CHARLOTTE, NORTH CAROLINA
VM-3
NOTES:
VIMS = VAPOR INTRUSION MITIGATION SYSTEM
TYP = TYPICAL
SCH = SCHEDULE
PVC = POLYVINYL CHLORIDE
NTS = NOT TO SCALE
MIL = THOUSANDS OF AN INCH
ALL PIPE MEASUREMENTS ARE BY DIAMETER SOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060PROFESSIONAL
APPROVAL
VIMS SPECIFICATIONS
1.THIS VAPOR MITIGATION PLAN WAS USED FOR DIRECTION OF VIMS COMPONENT INSTALLATION ONLY AND WAS NOT USED TO GUIDE CONSTRUCTION OF BUILDING STRUCTURAL
COMPONENTS. CONSTRUCTION CONTRACTOR VERIFIED CONSISTENCY OF VIMS DETAILS WITH APPLICABLE STRUCTURAL, ARCHITECTURAL, MECHANICAL, & PLUMBING PLANS AND RESOLVED
ANY INCONSISTENCIES PRIOR TO VIMS INSTALLATION.
VIMS VAPOR LINER CONSISTS OF VAPORBLOCK PLUS 20 (VBP20) 20-MIL VAPOR LINER MANUFACTURED BY VIAFLEX, INC. FORMERLY RAVEN INDUSTRIES.
ONE VAPOR LINER PRODUCT AND ASSOCIATED ACCESSORIES WAS USED THROUGHOUT THE SYSTEM. THE VAPOR LINER WAS INSTALLED AS SPECIFIED HEREIN AND PER MANUFACTURER
INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS LINER BELOW MITIGATED AREAS, AND ALONG RETAINING WALLS AND SLAB-ON-GRADE FOLDS WITHIN THE EXTENT OF VAPOR LINER
BOUNDARY. A MINIMUM 5-INCH THICK BASE COURSE CONSISTING OF CLEAN #57 STONE (WASHED WITH NO FINES) WAS INSTALLED BENEATH THE VIMS VAPOR LINER.
THE VAPOR LINER WAS PROPERLY SEALED IN ACCORDANCE WITH THE MANUFACTURER INSTALLATION INSTRUCTIONS AS SPECIFIED IN THESE DRAWINGS TO FOOTERS, SLAB STEPS, RETAINING
WALLS, PENETRATIONS (SUCH AS PIPE PENETRATIONS), OR OTHER BUILDING COMPONENTS WITHIN THE VIMS EXTENTS. VAPOR LINER WAS INSTALLED UNDER CMU WALLS WHICH SUPPORT
OCCUPIED ENCLOSED SPACES.
VAPOR BARRIER WAS INSTALLED ON SLABS, WALLS, AND OTHER STRUCTURAL COMPONENTS WHICH COME IN CONTACT WITH BOTH AN OCCUPIABLE ENCLOSED SPACE AND SOIL.
CONCRETE BOXOUTS INSPECTED BY H&H, INCLUDING BUT NOT LIMITED TO SHOWER/BATH TUB DRAINS, HAVE A CONTINUOUS VAPOR LINER INSTALLED BELOW.
2.SUB-SLAB PERFORATED VAPOR COLLECTION PIPE CONSISTS OF THREADED FLUSH JOINT 3" SCH 40 PVC PERFORATED PIPE WITH 5/8" DIAMETER PERFORATIONS IN A 4-HOLE PATTERN.
PERFORATIONS WERE SPACED APPROXIMATELY 8" HORIZONTALLY. A VENT CAP WAS INSTALLED ON THE OPEN PIPE END. PVC PIPE JOINTS WERE DRY-FITTED BELOW THE SLAB. SLOTTED
COLLECTION PIPING WAS SET WITHIN A MINIMUM 5” BASE COURSE LAYER, WITH APPROXIMATELY 1” OF BASE COURSE MATERIAL BELOW THE PIPING.
3.4" SCH 40 PVC RISER DUCT PIPING WAS INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT WITH TURBINE VENTILATOR. ABOVE-SLAB
RISER DUCT PIPE RUNS BETWEEN THE SLAB PENETRATION AND THE ROOFTOP EXHAUST DISCHARGE WERE INSTALLED IN ACCORDANCE WITH THE VIMS PLANS AND AS SPECIFIED IN THE
CONSTRUCTION DOCUMENTS AND DRAWINGS. VERTICAL RISER PIPING WAS CONNECTED WITH PVC PRIMER AND GLUE. VIMS BELOW AND ABOVE GRADE SOLID PIPING ARE NOT BE TRAPPED
AND ARE SLOPED A MINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN. BENDS, TURNS, AND ELBOWS IN VERTICAL RISER PIPES WERE MINIMIZED FROM
THE SLAB TO THE ROOFTOP.
4.4" SCH 40 PVC RISER DUCT PIPING EXTENDS IN A VERTICAL ORIENTATION THROUGH THE BUILDING ROOF AND TERMINATES A MINIMUM OF 2 FT ABOVE THE BUILDING ROOF LINE. EMPIRE
MODEL TV04SS STAINLESS STEEL TURBINE VENTILATORS (OR ALTERNATE APPROVED BY ENGINEER) WERE INSTALLED ON THE EXHAUST DISCHARGE END OF EACH RISER DUCT PIPE. THE 4" RISER
DUCT PIPE AND THE FAN ARE SECURED TO THE PVC RISER IN A VERTICAL ORIENTATION. EXHAUST DISCHARGE LOCATIONS ARE A MINIMUM OF 10 FT FROM ANY OPERABLE OPENING OR AIR
INTAKE INTO THE BUILDING. NOTE THAT SOME DISCHARGE LOCATIONS ON THE ROOFTOP DEPICTED IN THE VAPOR MITIGATION PLAN WERE REPOSITIONED WITH THE NEW POSITION MEETING
THE REQUIREMENTS PRESENTED ABOVE, WITH ENGINEER APPROVAL. AN ELECTRICAL JUNCTION BOX (120V REQUIRED) FOR OUTDOOR USE WAS INSTALLED NEAR THE FAN LOCATION ON THE
ROOFTOP FOR POTENTIAL FUTURE CONVERSION TO ELECTRIC FANS, IF REQUIRED.
5.ABOVE-SLAB ACCESSIBLE RISER DUCT PIPING IS PERMANENTLY IDENTIFIED BY MEANS OF A TAG OR STENCIL AT A MINIMUM OF ONCE EVERY 10-LINEAR FT WITH "VAPOR MITIGATION. CONTACT
MAINTENANCE". LABELS ARE ALSO FIXED TO THE TURBINE VENTILATORS IN AN ACCESSIBLE LOCATION ON THE ROOFTOP.
6.MONITORING POINTS CONSIST OF 2-INCH DIAMETER SCH 40 PVC PIPE WITH A 90-DEGREE ELBOW TO FORM AN “L” SHAPE. A MINIMUM OF 6” SECTION OF PIPING IS SET WITHIN THE BASE
COURSE LAYER WITH AN OPEN ENDED PIPE OR PIPE PROTECTION SCREEN AT THE TERMINATION. THE PIPE TERMINATION IS ENCASED WITHIN THE BASE COURSE LAYER. THE HORIZONTAL PIPING
IS SLOPED A MINIMUM OF 1/8 UNIT VERTICAL BY 12 UNITS HORIZONTAL (1% SLOPE) TO GRAVITY DRAIN TOWARDS THE PIPE TERMINATION AND PREVENT MOISTURE FROM COLLECTING AT THE
90-DEGREE ELBOW. A 4-INCH DIAMETER ADJUSTABLE FLOOR CLEAN-OUT (ZURN INDUSTRIES MODEL #CO2450-PV4, OR EQUIVALENT) WAS INSTALLED AND SET FLUSH WITH THE FINISHED
CONCRETE SURFACE. MONITORING POINT INTAKES ARE A MINIMUM 5-FT FROM EXTERIOR FOOTING.
6.1.MONITORING POINTS LABELED AS TEMPORARY WERE ABANDONED USING AIR-TIGHT SEALANT AND CONCRETE AFTER TESTING PER PERMISSION OF THE DESIGN ENGINEER AND DEQ.
7.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS WERE INSTRUCTED TO USE "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN POSSIBLE, AND WERE INSTRUCTED TO NOT USE
PRODUCTS CONTAINING THE COMPOUNDS TETRACHLOROETHENE (PCE) OR TRICHLOROETHENE(TCE). THE CONSTRUCTION CONTRACTOR AND SUB-CONTRACTORS PROVIDED SAFETY DATA
SHEETS (SDS) TO THE ENGINEER FOR THE PRODUCTS AND MATERIALS USED FOR CONSTRUCTION OF THE VIMS.
8.IN INSTANCES WHERE A THICKENED FOOTING OR RETAINING WALL WAS NOT SPECIFIED AT THE EXTENT OF VAPOR LINER, A THICKENED SLAB OR FOOTER WAS INSTALLED BY THE CONTRACTOR
THAT INCLUDES A SOIL SUBBASE TO CREATE A CUT-OFF FOOTER AT THE EXTENT OF VAPOR LINER. THE ADDITIONAL THICKENED SLAB OR FOOTER DOES NOT ALLOW FOR CONTINUOUS GRAVEL
BETWEEN THE VIMS EXTENTS AND EXTERIOR PORTIONS OF THE BUILDING WITH AT LEAST 12" SEPARATION OF ADJACENT GRAVEL BEDS. THE THICKENED SLAB OR FOOTER IS A MINIMUM OF 5"
GREATER IN THICKNESS THAN THE SURROUNDING SLAB.
9.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS AVOIDED THE USE OF TEMPORARY FORM BOARDS THAT PENETRATE THE VAPOR LINER WHERE POSSIBLE. IF TEMPORARY FORM
BOARDS ARE USED, THE SIZE AND NUMBER OF PENETRATIONS THROUGH THE VAPOR LINER WAS LIMITED AND SMALL DIAMETER SOLID STAKES (I.E. METAL STAKES) WERE USED. AS FORM
BOARDS WERE REMOVED, THE CONTRACTOR OR SUB-CONTRACTORS WERE INSTRUCTED TO RESEAL ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER INSTALLATION
INSTRUCTIONS.
10.INSPECTIONS: INSPECTIONS OF EACH COMPONENT OF THE VIMS WAS CONDUCTED BY THE ENGINEER, OR ENGINEER'S DESIGNEE, TO CONFIRM VIMS COMPONENTS ARE INSTALLED PER THE
APPROVED DESIGN. THE REQUIRED INSPECTION COMPONENTS INCLUDED: (1) INSPECTION OF SUB-SLAB PIPING LAYOUT, (2) GRAVEL PLACEMENT, AND (3) MONITORING POINT PLACEMENT
PRIOR TO INSTALLING VAPOR BARRIER; (4) INSPECTION OF VAPOR BARRIER PRIOR TO POURING CONCRETE; (5) INSPECTION OF ABOVE-GRADE PIPING LAYOUT; AND (6) INSPECTION OF TURBINE
VENTILATORS AND RISER DUCT PIPE CONNECTIONS. INSPECTIONS WERE COMBINED WHEN POSSIBLE DEPENDING ON THE CONSTRUCTION SEQUENCE/SCHEDULE. THE CONSTRUCTION
CONTRACTOR(S) COORDINATED WITH THE ENGINEER TO PERFORM THE REQUIRED INSPECTIONS.
11.PIPE SLEEVES WERE INSTALLED AND/OR SEALED TO PREVENT A PREFERENTIAL AIR PATHWAY FROM BELOW THE SLAB INTO THE BUILDING. REFER TO TO STRUCTURAL DRAWINGS FOR FOOTING
DETAILS ADDRESSING VIMS PIPING.
12.THE VAPOR BARRIER WAS INSTALLED BETWEEN WATERPROOFING AND ANY DRAINAGE FEATURES INCLUDING DRAINAGE MATS WHERE IT OVERLAPS (SEE DETAIL #16). THE INSTALLER
CONFIRMED THAT THE WATERPROOFING PRODUCTS AND SEALANTS USED DURING CONSTRUCTION ARE COMPATIBLE WITH THE SPECIFIED VAPOR BARRIER.
JANUARY 19, 2024
01/19/24
S:\AAA-Master Projects\Akridge (AKR)\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMS As-Builts AKR.007_Western.dwg

Appendix C
VIMS Installation Photographs
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 2: Representative view of perforated sub-slab vent piping in Retail B – South installed
within clean #57 stone bed.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 1: Representative view of sub-slab perforated piping network and monitoring point (2-inch
PVC on left side of picture) within clean #57 stone bed in Retail A.
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 4: View of Viaflex VBP-20 vapor barrier (gold) below utility rooms in parking garage.
Remainder of parking garage contains Viaflex Vaporblock 10 vapor barrier (blue)
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 3: Representative view of sub-slab perforated piping with 4-hole pattern 5/8” diameter
perforations prior to covering with stone bed.
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 6: Representative view of Viaflex VBP20 vapor barrier installed below ribbon slab in
Retail B.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 5: Representative view of Viaflex VBP20 vapor barrier across slab in Retail A.
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 8: View of Viaflex VBP-20 vapor barrier installed within Retail B.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 7: Representative view of Viaflex Pour-n-Seal installed at electrical conduit utility bank
in Retail B ribbon slab.
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 10: View of Viaflex VBP-20 installed within stairwell near Retail A.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 9: Representative view of Viaflex Butyl-Seal double-side tape (black) used to seal
vapor barrier at along concrete termination.
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 12: Representative view of VIMS riser (F-A1) construction with affixed label.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 11: Representative view of VIMS riser (F-BN1) construction with affixed label.
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINAProject # AKR.007Photograph 14: Representative view of electric fan temporarily installed for pilot (influence)
testing on discharge end of the riser on the roof.
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203704.586.0007(p) 704.586.0373(f)
Photograph 13: Representative view of Empire turbine ventilator installed on the roof.

Appendix D
VIMS Product Specification Sheets
PRODUCT PART #
VaporBlock® Plus™ 20 ................................................................ VBP20
UNDER-SLAB VAPOR / GAS BARRIER
Under-Slab Vapor/Gas Retarder
VAPORBLOCK® PLUS™VBP20
PRODUCT DESCRIPTION
VaporBlock® Plus™ is a seven-layer co-extruded barrier
made using high quality virgin-grade polyethylene and
EVOH resins to provide unmatched impact strength as well
as superior resistance to gas and moisture transmission.
VaporBlock® Plus™ 20 is more than 100 times less permeable
than typical high-performance polyethylene vapor retarders
against Methane, Radon, and other harmful VOCs. Tested and
verified for unsurpassed protection against BTEX, HS, TCE, PCE,
methane, radon, other toxic chemicals and odors.
VaporBlock® Plus™ 20 multi-layer gas barrier is manufactured
with the latest EVOH barrier technology to mitigate hazardous
vapor intrusion from damaging indoor air quality, and the safety
and health of building occupants. VBP20 is one of the most
effective underslab gas barriers in the building industry today
far exceeding ASTM E-1745 (Plastic Water Vapor Retarders
Used in Contact with Soil or Granular Fill Under Concrete Slabs)
Class A, B and C requirements. Available in a 20 (Class A) mil
thicknesses designed to meet the most stringent requirements.
VaporBlock® Plus™ 20 is produced within the strict guidelines
of our ISO 9001 Certified Management System.
PRODUCT USE
VaporBlock® Plus™ 20 resists gas and moisture migration
into the building envelop when properly installed to provide
protection from toxic/harmful chemicals. It can be installed as
part of a passive or active control system extending across the
entire building including floors, walls and crawl spaces. When
installed as a passive system it is recommended to also include
a ventilated system with sump(s) that could be converted to an
active control system with properly designed ventilation fans.
VaporBlock® Plus™ 20 works to protect your flooring and
other moisture-sensitive furnishings in the building’s interior
from moisture and water vapor migration, greatly reducing
condensation, mold and degradation.
SIZE & PACKAGING
VaporBlock® Plus™ 20 is available in 10’ x 150’ rolls to
maximize coverage. All rolls are folded on heavy-duty cores
for ease in handling and installation. Other custom sizes
with factory welded seams are available based on minimum
volume requirements. Installation instructions and ASTM E-1745
classifications accompany each roll.
© 2022 VIAFLEX, INC. All rights reserved.
APPLICATIONS
Radon Barrier
Methane Barrier
VOC Barrier
Brownfields Barrier
Vapor Intrusion Barrier
Under-Slab Vapor Retarder
Foundation Wall Vapor Retarder
VaporBlock® Plus™ is a seven-layer co-extruded barrier made using high quality virgin-grade polyethylene and EVOH resins to provide unmatched impact strength as well as superior resistance to gas and moisture transmission.
VaporBlock® Plus™ Placement
All instructions on architectural or structural drawings should be reviewed and followed.
Detailed installation instructions accompany each roll of VaporBlock® Plus™ and can also be located at www.ravenefd.com.
ASTM E-1643 also provides general installation information for vapor retarders.
VAPORBLOCK® PLUS™ 20
PROPERTIES TEST METHOD IMPERIAL METRIC
AppeArAnce White/Gold
Thickness, nominAl 20 mil 0.51 mm
WeighT 102 lbs/MSF 498 g/m²
clAssificATion ASTM E 1745 CLASS A, B & C
³ Tensile sTrengTh
ASTM E 154Section 9(D-882)58 lbf 102 N
impAcT resisTAnce ASTM D 1709 2600 g
permeAnce (neW mATeriAl)
ASTM E 154Section 7ASTM E 96Procedure B
0.0098 Perms
grains/(ft²·hr·in·Hg)
0.0064 Perms
g/(24hr·m²·mm Hg)
permeAnce (AfTer condiTioning)
(sAme meAsuremenT As Above permeAnce)
ASTM E 154Section 8, E96Section 11, E96Section 12, E96Section 13, E96
0.00790.00790.00970.0113
0.00520.00520.00640.0074
WvTr ASTM E 96Procedure B 0.0040 grains/hr-ft²0.0028 gm/hr-m²
benzene permeAnce See Note ⁶1.13 x 10-¹⁰ m²/sec or 3.62 x 10-¹³ m/s
Toluene permeAnce See Note ⁶1.57 x 10-¹⁰ m²/sec or 1.46 x 10-¹³ m/s
eThylbenzene permeAnce See Note ⁶1.23 x 10-¹⁰ m²/sec or 3.34 x 10-¹⁴ m/s
m & p-Xylenes permeAnce See Note ⁶1.17 x 10-¹⁰ m²/sec or 3.81 x 10-¹⁴ m/s
o-Xylene permeAnce See Note ⁶1.10 x 10-¹⁰ m²/sec or 3.43 x 10-¹⁴ m/s
hydrogen sulfide See Note 9 1.92E-⁰⁹ m/s
TrichloroeThylene (Tce) See Note ⁶7.66 x 10-¹¹ m²/sec or 1.05 x 10-¹⁴ m/s
perchloroeThylene (pce)See Note ⁶7.22 x 10-¹¹ m²/sec or 1.04 x 10-¹⁴ m/s
rAdon diffusion coeffiecienT K124/02/95 < 1.1 x 10-13 m2/s
meThAne permeAnce ASTM D 1434 3.68E-¹² m/sGas Transmission Rate (GTR):0.32 mL/m²•day•atm
mAXimum sTATic use TemperATure 180° F 82° C
minimum sTATic use TemperATure - 70° F - 57° C
UNDER-SLAB VAPOR / GAS BARRIER
VAPORBLOCK® PLUS™VBP20
³ Tests are an average of machine and transverse directions.5 Raven Industries performs seam testing at 20” per minute.6 Aqueous Phase Film Permeance.
Permeation of Volatile Organic Compounds through EVOH Thin Film Membranes and Coextruded LLDPE/EVOH/
LLDPE Geomembranes, McWatters and Rowe, Journal of Geotechnical and Geoenvironmental Engineering© ASCE/
September 2015. (Permeation is the Permeation Coefficient adjusted to actual film thickness - calculated at 1 kg/m³.)
The study used to determine PCE and TCE is titled: Evaluation of diffusion of PCE & TCE through high performance geomembranes by Di
Battista and Rowe, Queens University 8 Feb 2018.9 The study used to determine diffusion coefficients is titled: Hydrogen Sulfide (H₂S) Transport through Simulated Interim Covers with Conventional and Co-Extruded Ethylene-Vinyl Alcohol (EVOH) Geomembranes.
Scan QR Code to download technical data sheets.
Note: To the best of our knowledge, unless otherwise stated, these are typical property values and are intended as guides only, not as specification limits. Chemical resistance, odor transmission, longevity as well as other performance criteria is not implied or given and actual testing must be performed for applicability in specific applications and/or conditions. VIAFLEX MAKES NO WARRANTIES AS TO THE FITNESS FOR A SPECIFIC USE OR MERCHANTABILITY OF PRODUCTS REFERRED TO, no guarantee of satisfactory results from reliance upon contained information or recommendations and disclaims all liability for resulting loss or damage. Limited Warranty available at www.viaflex.com
VIAFLEX, INC.821 W Algonquin Street Sioux Falls, SD 57104 Ph: [phone] • TF: [phone]© 2022 VIAFLEX, INC. All rights reserved.27-0123 09/22
[e-mail] www.viaflex.com
INSTALLATION GUIDELINES - With VaporSeal™ Tape
VaporSeal™
4” Tape
VaporSeal™ 4” Tape Optional Butyl Seal
2-Sided Tape
Gas Barrier Applications
Elements of a moisture/gas-resistant floor system. General illustration only.(Note: This example shows multiple options for waterstop placement.
VaporSeal™
4” Tape
VaporSeal™ 4” Tape Optional Butyl Seal
2-Sided Tape
Gas Barrier Applications
Fig. 2: VaporBlock® Plus™ Overlap Joint Sealing Methods
Fig. 1: VaporBlock® Plus™ Overlapping Roll-out Method
Please Note: Read these instructions thoroughly before installation to ensure proper use of VaporBlock® Plus™. ASTM E 1465, ASTM E 2121 and, ASTM E 1643 also provide valuable information regarding the installation of vapor / gas barriers. When installing this product, contractors shall conform to all applicable local, state and federal regulations and laws pertaining to residential and commercial building construction.
• When VaporBlock® Plus™ gas barrier is usedas part of an active control system for radon orother gas, a ventilation system will be required.
• If designed as a passive system, it is recommended to install a ventilation system that could beconverted to an active system if needed.
Materials List:VaporBlock® Plus™ Vapor / Gas BarrierVaporSeal™* 4” Seaming TapeVaporSeal™* 12” Seaming/Repair TapeButyl Seal 2-Sided TapeVaporBoot Plus Pipe Boots 12/Box (recommended)VaporBoot Tape (optional)POUR-N-SEAL™ (optional)1” Foam Weather Stripping (optional)Mako® Screed Supports (optional)
VAPORBLOCK® PLUS™ PLACEMENT
1.1. Level and tamp or roll granular base as specified. A base for a gas-reduction system may require a 4” to 6” gas permeable layer of clean coarse aggregate as specified by your architectural or structural drawings after installation of the recommended gas collection system. In this situation, a cushion layer consisting of a non-woven geotextile fabric placed directly under VaporBlock® Plus™ will help protect the barrier from damage due to possible sharp coarse aggregate.
1.2. Unroll VaporBlock® Plus™ running the longest dimension parallel with the direction of the pour and pull open all folds to full width. (Fig. 1)
1.3. Lap VaporBlock® Plus™ over the footings and seal with VIAFLEX Butyl Seal tape at the footing-wall connection. Prime concrete surfaces, when necessary, and assure they are dry and clean prior to applying VIAFLEX Butyl Seal Tape. Apply even and firm pressure with a rubber roller. Overlap joints a minimum of 6” and seal overlap with 4” VaporSeal™ Tape. When used as a gas barrier, overlap joints a minimum of 12” and seal in-between overlap with an optional 2-sided VIAFLEX Butyl Seal Tape. Then seal with 4” VaporSeal™ Tape centered on the overlap seam. (Fig. 2)
Page 1 of 4 Top original diagram and figure #1 were reprinted with permission by the Portland Cement Association.Reference: Kanare, Howard M., Concrete Floors and Moisture, EB119, Portland Cement Association, Skokie, Illinois, and National Ready Mixed Concrete Association, Silver Spring, Maryland, USA, 2008, 176 pages.
1.4. Seal around all plumbing, conduit, support columns or other penetrations that come through the VaporBlock® Plus™ membrane.
1.4a. Method 1: Pipes four inches or smaller can be sealed with VIAFLEX VaporBoot Plus preformed pipe boots. VaporBoot Plus preformed pipe boots are formed in steps for 1”, 2”, 3” and 4” PVC pipe or IPS size and are sold in units of 12 per box (Fig. 3 & 5).
Pipe boots may also be fabricated from excess VaporBlock® Plus™ membrane (Fig. 4 & 6) and sealed with VaporBoot Tape or VaporSeal™ Tape (sold separately).
1.4b. Method 2: To fabricate pipe boots from VaporBlock® Plus™ excess material (see Fig. 4 & 6 for A-F):
A)Cut a square large enough to overlap 12” in all directions.
B) Mark where to cut opening on the center of the square and cut four to eight slices about 3/8” less than the diameter of the pipe.
C) Force the square over the pipe leaving the tightly stretched cut area around the bottom of the pipe with approximately a 1/2” of the boot material running vertically up the pipe. (no more than a 1/2” of stretched boot material is recommended)
D) Once boot is positioned, seal the perimeter to the membrane by
applying 2-sided VIAFLEX Butyl Seal Tape in between the two layers. Secure boot down firmly over the membrane taking care not to have any large folds or creases.
E) Use VaporBoot Tape or VaporSeal™ Tape to secure the boot to the
pipe. VaporBoot Tape (option) – fold tape in half lengthwise, remove
half of the release liner and wrap around the pipe allowing 1” extra
for overlap sealing. Peel off the second half of the release liner
and work the tape outward gradually forming a complete seal.
VaporSeal™ Tape (option) - Tape completely around pipe
overlapping the VaporBlock® Plus™ square to create a tight seal
against the pipe.
F) Complete the process by taping over the boot perimeter edge with VaporSeal™ Tape to create a monolithic membrane between the surface of the slab and gas/moisture sources below and at the slab perimeter. (Fig. 4 & 6)
Preformed Pipe Boot Square Material Pipe Boot
Fig. 3
SINGLE PENETRATION PIPE BOOT INSTALLATION
Fig. 5 Fig. 6
1. Cut a square of VaporBlock® Plus™ barrier to extend at least12” from the pipe in all directions.
2. Cut four to eight slices about 3/8”less than the diameter of the pipe.
5. Use VIAFLEX VaporBoot orVaporSeal™ Tape andoverlap 1” at the seam.
4. Tape over the bootperimeter edge withVaporSeal™ Tape.
1. Cut out one of thepreformed boot steps(1” to 4”).
2. Tape the underside bootperimeter with 2-sidedButyl Seal Tape.
3. Force the boot overpipe and press tapefirmly in place.
4. Use VaporSeal™ Tape
to secure boot to thepipe.
5. Tape around entire bootedge with VaporSeal™Tape.
VaporBoot Flexible Tapeor VaporSeal™ 4” TapeVaporSeal™ 4” Tape
VaporBlock® Plus™Material
VaporSeal™ 4” Tape
VIAFLEX Butyl Seal2-Sided Tape VIAFLEX Butyl Seal2-Sided Tape
VaporBoot PlusPreformed Boot 12”(minimum)
3. Force over pipe and tape theunderside boot perimeter toexisting barrier with 2-sidedButyl Seal Tape.
Fig. 4
Page 2 of 4 Original figure #4 diagram is reprinted with permission by the Portland Cement Association.Reference: Kanare, Howard M., Concrete Floors and Moisture, EB119, Portland Cement Association, Skokie, Illinois, and National Ready Mixed Concrete Association, Silver Spring, Maryland, USA, 2008, 176 pages.Method 1
Method 2
VaporSeal™4” Tape VaporBoot PlusPerformed Boot
VIAFLEX Butyl Seal 2-sided Tape VIAFLEX Butyl Seal 2-sided Tape
1.5. Sealing side-by-side multiple penetrations (option 1);
A) Cut a patch large enough to overlap 12” in all directions (Fig. 7)
of penetrations.
B) Mark where to cut openings and cut four to eight slices about
3/8” less than the diameter of the penetration for each.
C)Force patch material over penetration to achieve a tight fit and
form a lip.
D) Once patch is positioned, seal the perimeter to the membrane
by applying 2-sided VIAFLEX Butyl Seal Tape in-between the two layers. (Fig. 8)
E) After applying VIAFLEX Butyl Seal Tape between the patch
and membrane, tape around each of the penetrations and the
patch with VaporSeal™ 4” tape. (Fig. 9) For additional protection
apply POUR-N-SEAL™ or an acceptable polyurethane
elastomeric sealant around the penetrations. (Fig. 10)
Fig. 7 Fig. 8
Fig. 9 Fig. 10
MULTIPLE PENETRATION PIPE BOOT INSTALLATION
Fig. 6
Cut a patch large enough to overlap 12” in all directions and slide over penetrations (Make openings as tight as possible.)
Once the overlay patch is positioned, seal the perimeter to the membrane by applying 2-sided VIAFLEX Butyl Seal Tape in-between the two layers.
After applying VIAFLEX Butyl Seal Tape between the patch and membrane, tape around the perimeter of the penetration and the patch with VaporSeal™ 4” Tape.
For additional protection apply POUR-N-SEAL™ or an acceptable polyurethane elastomeric sealant around the penetrations.
VaporSeal™ 4” Tape VaporSeal™ 4” Tape
Page 3 of 4
Option 1
VIAFLEX Butyl Seal 2-sided Tape
1.6. POUR-N-SEAL™ method of sealing side-by-side multiple penetrations (option 2);
A) Install the vapor barrier as closely as possible to pipe penetrations tominimize the amount of POUR-N-SEAL™ necessary to seal around allpenetrations.
B) Once barrier is in place, remove soil or other particles with a dry clothor a fine broom to allow for improved adhesion to the POUR-N-SEAL™ liquid.
C) Create a dam around the penetration area approximately 2” awayfrom the pipe or other vertical penetrations by removing the releaseliner from the back of a 1” weather stripping foam and adhere to thevapor barrier. Form a complete circle to contain the POUR-N-SEAL™materials (Fig. 11).
D) Once mixed, pour contents around the pipe penetrations. If needed,a brush or a flat wooden stick can be used to direct the sealantcompletely around penetrations creating a complete seal (Fig. 12-13).
E) DO NOT leave excess POUR-N-SEAL™ in plastic container for longerthan the time it takes to pour sealant.
Fig. 12 Fig. 13
Fig. 11
Option 2
VAPORBLOCK® PLUS™ REPAIR INSTRUCTIONS
1.7. Proper installation requires all holes and openings are repaired prior
to placing concrete. When patching small holes, simply cut a 12” long
piece of 12” wide VaporSeal™ tape. Remove release liner and center
over the opening. Apply pressure to create a seal (Fig. 14-15).
1.8. When installing VaporBlock® Plus™ around pipe penetrations,
vertical columns, electrical ducts and other obstructions, you will
find it necessary to cut it to the nearest outside edge. This cut can
be easily sealed with 12” wide VaporSeal™ tape, by simply centering
it over the cut, 6” on either side. Once the tape is placed correctly,
apply pressure to assure a complete seal (Fig. 16).
Reminder Note: All holes or penetrations through the membrane will need
to be patched with 12” VaporSeal™ Tape.
Fig. 14
Page 4 of 5
Fig. 15
2.1. When installing reinforcing steel and utilities, in addition to the
placement of concrete, take precaution to protect VaporBlock®
Plus™. Carelessness during installation can damage the most
puncture–resistant membrane. Sheets of plywood cushioned with
geotextile fabric temporarily placed on VaporBlock® Plus™ provide
for additional protection in high traffic areas including concrete
buggies.
2.2. Use only brick-type or chair-type reinforcing bar supports to protect
VaporBlock® Plus™ from puncture.
2.3. Avoid driving stakes through VaporBlock® Plus™. If this cannot be
avoided, each individual hole must be repaired per section 1.7.
2.4. To avoid penetrating VaporBlock® Plus™ when installing screed
supports, utilize non-penetrating support, such as the Mako®
Screed Support System (Fig. 17). Avoid driving stakes through
VaporBlock® Plus™. If this cannot be avoided, each individual hole
must be repaired per figures 14-15.
2.5. If a cushion or blotter layer is required in the design between
VaporBlock® Plus™ and the slab, additional care should be given if
sharp crushed rock is used. Washed rock will provide less chance of
damage during placement. Care must be taken to protect blotter layer
from precipitation before concrete is placed.
VaporBlock® Plus™ Gas & Moisture Barrier can be identified on site
as gold/white in color printed in black ink with following logo and
classification listing (Fig. 18)
Page 5 of 5
VaporBlock® Plus™
Gas & Moisture Barrier
VAPORBLOCK® PLUS™ PROTECTION
Fig. 16
Fig. 18
Fig. 17
*Patent Pending
Note: To the best of our knowledge, unless otherwise stated, these are typical property values and are intended as guides only, not as specification limits. Chemical resistance, odor transmission, longevity as well as other performance criteria is not implied or given and actual testing must be performed for applicability in specific applications and/or conditions. VIAFLEX MAKES NO WARRANTIES AS TO THE FITNESS FOR A SPECIFIC USE OR MERCHANTABILITY OF PRODUCTS REFERRED TO, no guarantee of satisfactory results from reliance upon contained information or recommendations and disclaims all liability for resulting loss or damage. Limited Warranty available at www.viaflex.com
VIAFLEX, INC.
821 W Algonquin Street Sioux Falls, SD 57104 Ph: [phone] • TF: [phone]© 2022 VIAFLEX, INC. All rights reserved.27-0126 09/22
[e-mail] www.viaflex.com
TECHNICAL DATA
IMPORTANT: The information contained herein supersedes all previous printed versions, and is believed to be accurate and reliable. For the most up-to-date information, please contact CETCO sales team. CETCO accepts no responsibility for the results obtained through application of this product. CETCO reserves the right to update information without notice.
FORM: TDS_CETSEAL_EMEA_EN_201504_V2
www.CETCO.com | [e-mail]
CETSEAL
SEALANT/ADHESIVE
DESCRIPTION
CETSEAL is a multi-purpose, single com-
ponent polyether moisture cure sealant/
adhesive. CETSEAL is a low VOC, 100%
solids, non-shrinking product with excellent
UV resistance.
APPLICATIONS
The primary applications are:
• Ground level termination sealant
• Membrane lap sealant
• Waterstop adhesive
INSTALLATION
Ground Level Termination Sealant:
Ground Level Termination Sealant: At ground
level termination of waterproofing mem-
brane, apply continuous tooled bead of
CETSEAL along the top edge of the termina-
tion bar that covers and seals the top edge
of the waterproofing membrane to the sub-
strate.
Membrane Lap Sealant: Apply a bead of
CETSEAL in accordance with waterproofing
membrane installation guidelines.
Waterstop Adhesive: Apply a continuous
bead of CETSEAL to substrate and/or water-
stop then install waterstop before CETSEAL
skins over. Yield will vary with use, substrate
and application. Typical yield at 6 mm diam-
eter bead: 290 ml cartridge – 6 m.
PRECAUTIONS
Remove all dirt and debris, surface coat-
ings and sealers before application. Prepare
metal by removing rust, scale and oil residue.
Allow treated lumber to cure for six months
prior to application. Do not apply in standing
water conditions or at temperature below
–4°C.
PACKAGING
290 ml cartridges – 12 cartridges per case.
TYPICAL UNCURED PROPERTIES
PROPERTY TYPICAL VALUE
Gun Grade Zero Slump ASTM C 697
Viscosity 750,000+ cps Brookfield RVF, TF spindle, 4 RPM, 23°C
Initial Skin Formation 10–15 minutes
Odour Almost Odourless
TYPICAL CURED PROPERTIES
PROPERTY TEST METHOD TYPICAL VALUE
Elongation at Break DIN 53504 600%
Hardness Shore A DIN 53505 40 + 5
Low Temperature Flex ASTM D816 10°C
Shrinkage No measurable shrinkage after 14 days
Temperature Resistance
(Fully Cured)
–40°C to +90°C
Shelf Life 1 year
UPDATED: APRIL 2015
TURBINE VENTILATORS
CONSTRUCTION SPECIFICATIONS
“A”
THROAT SIZE
GUAGE NO. OF
BRACES
BRACE
MATERIALCROWN GALV.BLADE GALV.THROAT GALV.
4 24 28 26 3 ALUMINUM
6 24 28 26 3 ALUMINUM
8 24 28 26 3 ALUMINUM
10 24 28 26 3 ALUMINUM
12 24 28 24 3 ALUMINUM
14 22 26 24 3 ALUMINUM
16 22 26 24 3 STEEL
18 22 26 24 4 STEEL
20 20 26 24 4 STEEL
24 20 26 22 4 STEEL
DIMENSIONAL AND PERFORMACE DATA
“A”
THROAT SIZE
“B”
HEIGHT
“C”
OVERALL WIDTH
EXHAUSTED
CAPACITY*
APPROX.
SHIPPING WEIGHT
4 12 10 1/4 125 5
6 14 1/2 12 3/4 147 7
8 15 14 1/4 255 8
10 16 1/4 16 1/4 425 11
12 17 19 631 13
14 19 3/4 22 3/4 700 21
16 21 3/4 25 1/2 950 31
18 24 29 1200 38
20 25 1/4 31 5/8 1700 46
24 28 1/4 35 3/4 2350 58
*4 MPHWIND CFM

Appendix E
Field Forms and Field Data
Category Example Criteria
Proper gravel base layer and thickness
Proper placement, type, and pitch of VIMS vent piping
Proper placement, type, and pitch of monitoring points
Correct vapor barrier type
Proper vapor barrier overlap and seals around penetrations per
manufacturer instructions
Proper vapor barrier installation along vertical walls (e.g. retaining walls,
elevators, etc.)
Good condition of vapor barrier
Riser pipe material and fitting connections
Proper pitch towards sub-slab (gravity drain)
Appropriate VIMS labels
Correct ventilator
Fan/ventilator function
Proper fittings and protection
Appropriate VIMS labels
Proper distance from roof intakes and parapets
Pilot test completed
Monitoring points finished and accessible
Vapor Intrusion Mitigation System - Inspection Checklist
Building/Area ID: Western Section
Start Date and End Date: July 2022 - December 2023
H&H Construction Manager: Joseph Gentilcore IV & Trinh DeSa
Proper Installation
(Initial below)
Site Name and H&H Project #: South & Hollis LoSo (AKR.007)
DEQ Brownfields ID: 24062-20-060
Sub-Slab
Vapor Barrier
Vent Riser Piping
JCG
JCG
JCG
JCG
JCG
TCD
Pilot Test / Checkout
JCG
JCG
JCG
JCG
JCG
JCG
JCG
Ventilators
JCG
JCG
JCG
TCD
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Akridge/AKR.007 LoSo Brownfields Implementation/VIMS Install/Western/inspection checklist_western\Template
Table E-1
VIMS Influence Testing Data
South and Hollis LoSo
Western Section
South Boulevard and Hollis Road
Brownfields Project No. 24062-20-060
H&H Project No. AKR.007
Date
Baseline Initial +10 mins
F-A1 0.000 -3.233 -3.228 Eagle Extreme
F-A2 0.000 -3.161 -3.208 Eagle Extreme
MP-A1 0.000 -0.024 -0.023 --
MP-A2 0.000 -0.054 -0.048 --
F-BN1 0.000 -3.178 -3.185 Eagle Extreme
F-BS1 0.000 -3.201 -3.187 Eagle Extreme
MP-BN1 0.000 -0.025 -0.026 --
MP-BS1 0.000 -0.042 -0.043 --
Notes
Vacuum measurements are reported in inches of water column (in-WC).
Vacuum measurements were collected post-completion and pre-occupancy.
TMP = temporary monitoring point; MP = Monitoring Point, mins = minutes
Fans utilized: Festa AMG Eagle Extreme from roof of building
Retail A
Retail B
December 20, 2023
Fan Model
Location Differential Pressure (in W.C.)
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA VIMS/AKR-007 - Trinh/Pilot Testing/Pilot Test Data_Dec 2023
1/11/2024
Table E-1 (Page 1 of 1)
Hart & Hickman, PC
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Appendix F
Laboratory Analytical Report
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
January 10, 2024
Joseph Gentilcore
Hart & Hickman - Charlotte, NC
2923 South Tryon Street, Suite 100
Charlotte, NC 28203
Project Location: Charlotte, NC
Client Job Number:
Project Number: AKR-007
Laboratory Work Order Number: 24A0185
Enclosed are results of analyses for samples as received by the laboratory on January 3, 2024. If you have any questions
concerning this report, please feel free to contact me.
Sincerely,
Rebecca Faust
Project Manager
QA Officer
Katherine Allen
Laboratory Manager
Daren Damboragian
Page 1 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL SUMMARY
1/10/2024Hart & Hickman - Charlotte, NC
2923 South Tryon Street, Suite 100
Charlotte, NC 28203
ATTN: Joseph Gentilcore
AKR-007
24A0185
The results of analyses performed on the following samples submitted to Con-Test, a Pace Analytical Laboratory, are found in this report.
PROJECT LOCATION:
PURCHASE ORDER NUMBER:
PROJECT NUMBER:
REPORT DATE:
WORK ORDER NUMBER:
FIELD SAMPLE #LAB ID:MATRIX TESTSAMPLE DESCRIPTION SUB LAB
Charlotte, NC
AKR-007
MP-A1 24A0185-01 Sub Slab -
EPA TO-15
MP-BN1 24A0185-02 Sub Slab -
EPA TO-15
MP-DUP 24A0185-03 Sub Slab -
EPA TO-15
MP-BS1 24A0185-04 Sub Slab -
EPA TO-15
Page 2 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CASE NARRATIVE SUMMARY
All reported results are within defined laboratory quality control objectives unless listed below or otherwise qualified in this report.
EPA TO-15
Qualifications:
Laboratory fortified blank/laboratory control sample recovery outside of control limits. Data validation is not affected since all results are "not
detected" for all samples in this batch for this compound and bias is on the high side.
Analyte & Samples(s) Qualified:
L-01
Hexachlorobutadiene
B362659-BS1
Laboratory fortified blank/laboratory control sample recovery is outside of control limits. Reported value for this compound is likely to be
biased on the low side.
Analyte & Samples(s) Qualified:
L-03
2-Hexanone (MBK)
24A0185-01[MP-A1], 24A0185-02[MP-BN1], 24A0185-03[MP-DUP], 24A0185-04[MP-BS1], B362659-BLK1, B362659-BS1
Continuing calibration verification (CCV) did not meet method specifications and was biased on the low side for this compound.
Analyte & Samples(s) Qualified:
V-05
1,2,4-Trichlorobenzene, 2-Hexanone (MBK)
24A0185-01[MP-A1], 24A0185-02[MP-BN1], 24A0185-03[MP-DUP], 24A0185-04[MP-BS1], B362659-BLK1, B362659-BS1, S098880-CCV1
Continuing calibration verification (CCV) did not meet method specifications and was biased on the high side for this compound.
Analyte & Samples(s) Qualified:
V-06
Hexachlorobutadiene
S098880-CCV1
Calibrations RSD for this compound is >30% but <40%.
Analyte & Samples(s) Qualified:
Z-01
Naphthalene
24A0185-01[MP-A1], 24A0185-02[MP-BN1], 24A0185-03[MP-DUP], 24A0185-04[MP-BS1], B362659-BLK1, B362659-BS1, S098880-CCV1
Page 3 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
The results of analyses reported only relate to samples submitted to Con-Test, a Pace Analytical Laboratory, for testing.
I certify that the analyses listed above, unless specifically listed as subcontracted, if any, were performed under my direction according to the approved methodologies listed
in this document, and that based upon my inquiry of those individuals immediately responsible for obtaining the information, the material contained in this report is, to the
best of my knowledge and belief, accurate and complete.
Meghan E. Kelley
Reporting Specialist
Page 4 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-A1
Sample ID: 24A0185-01
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -28.5
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -3.8
Sampled: 12/29/2023 14:32
Canister ID: 2347
Flow Controller ID: 4529
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 6.7 8.0 1/4/24 15:43 KMCJ16 4191.9 4.5
Benzene 0.18 0.20 1/4/24 15:43 KMCJ0.59 40.640.062 0.20
Benzyl chloride ND 0.80 1/4/24 15:43 KMCND44.10.11 0.56
Bromodichloromethane ND 0.20 1/4/24 15:43 KMCND41.30.054 0.36
Bromoform ND 0.20 1/4/24 15:43 KMCND42.10.071 0.73
Bromomethane ND 0.20 1/4/24 15:43 KMCND40.780.11 0.41
1,3-Butadiene ND 0.20 1/4/24 15:43 KMCND40.440.17 0.37
2-Butanone (MEK)4.4 8.0 1/4/24 15:43 KMCJ13 4242.2 6.6
Carbon Disulfide ND 2.0 1/4/24 15:43 KMCND46.20.38 1.2
Carbon Tetrachloride 0.096 0.20 1/4/24 15:43 KMCJ0.60 41.30.058 0.36
Chlorobenzene ND 0.20 1/4/24 15:43 KMCND40.920.050 0.23
Chloroethane ND 0.20 1/4/24 15:43 KMCND40.530.13 0.33
Chloroform ND 0.20 1/4/24 15:43 KMCND40.980.052 0.25
Chloromethane 0.54 0.40 1/4/24 15:43 KMC1.1 40.830.082 0.17
Cyclohexane 0.47 0.20 1/4/24 15:43 KMC1.6 40.690.088 0.30
Dibromochloromethane ND 0.20 1/4/24 15:43 KMCND41.70.054 0.46
1,2-Dibromoethane (EDB)ND 0.20 1/4/24 15:43 KMCND41.50.067 0.51
1,2-Dichlorobenzene ND 0.20 1/4/24 15:43 KMCND41.20.070 0.42
1,3-Dichlorobenzene ND 0.20 1/4/24 15:43 KMCND41.20.074 0.45
1,4-Dichlorobenzene ND 0.20 1/4/24 15:43 KMCND41.20.074 0.44
Dichlorodifluoromethane (Freon 12)0.92 0.20 1/4/24 15:43 KMC4.6 40.990.084 0.42
1,1-Dichloroethane ND 0.20 1/4/24 15:43 KMCND40.810.064 0.26
1,2-Dichloroethane ND 0.20 1/4/24 15:43 KMCND40.810.075 0.30
1,1-Dichloroethylene ND 0.20 1/4/24 15:43 KMCND40.790.057 0.23
cis-1,2-Dichloroethylene ND 0.20 1/4/24 15:43 KMCND40.790.062 0.24
trans-1,2-Dichloroethylene ND 0.20 1/4/24 15:43 KMCND40.790.065 0.26
1,2-Dichloropropane ND 0.20 1/4/24 15:43 KMCND40.920.055 0.25
cis-1,3-Dichloropropene ND 0.20 1/4/24 15:43 KMCND40.910.090 0.41
trans-1,3-Dichloropropene ND 0.20 1/4/24 15:43 KMCND40.910.10 0.47
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 1/4/24 15:43 KMCND41.40.080 0.56
1,4-Dioxane ND 2.0 1/4/24 15:43 KMCND47.20.98 3.5
Ethanol 11 8.0 1/4/24 15:43 KMC21 4155.3 10.0
Ethyl Acetate ND 2.0 1/4/24 15:43 KMCND47.20.58 2.1
Ethylbenzene ND 0.20 1/4/24 15:43 KMCND40.870.058 0.25
4-Ethyltoluene ND 0.20 1/4/24 15:43 KMCND40.980.087 0.43
Heptane 0.13 0.20 1/4/24 15:43 KMCJ0.54 40.820.13 0.52
Hexachlorobutadiene ND 0.20 1/4/24 15:43 KMCND42.10.12 1.2
Hexane ND 8.0 1/4/24 15:43 KMCND4282.6 9.3
2-Hexanone (MBK)ND 0.80 1/4/24 15:43 KMCV-05, L-03 ND 43.30.087 0.35
Isopropanol 3.1 8.0 1/4/24 15:43 KMCJ7.6 4202.5 6.2
Methyl tert-Butyl Ether (MTBE)ND 0.20 1/4/24 15:43 KMCND40.720.098 0.35
Methylene Chloride ND 2.0 1/4/24 15:43 KMCND46.90.54 1.9
4-Methyl-2-pentanone (MIBK)ND 0.20 1/4/24 15:43 KMCND40.820.11 0.43
Naphthalene ND 0.20 1/4/24 15:43 KMCZ-01 ND 41.00.13 0.70
Propene ND 8.0 1/4/24 15:43 KMCND4142.2 3.7
Styrene ND 0.20 1/4/24 15:43 KMCND40.850.11 0.46
1,1,2,2-Tetrachloroethane ND 0.20 1/4/24 15:43 KMCND41.40.050 0.34
Page 5 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-A1
Sample ID: 24A0185-01
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -28.5
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -3.8
Sampled: 12/29/2023 14:32
Canister ID: 2347
Flow Controller ID: 4529
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene ND 0.20 1/4/24 15:43 KMCND41.40.075 0.51
Tetrahydrofuran 2.6 2.0 1/4/24 15:43 KMC7.6 45.90.41 1.2
Toluene 0.20 0.20 1/4/24 15:43 KMCJ0.74 40.750.073 0.27
1,2,4-Trichlorobenzene ND 0.20 1/4/24 15:43 KMCV-05 ND 41.50.11 0.80
1,1,1-Trichloroethane ND 0.20 1/4/24 15:43 KMCND41.10.063 0.34
1,1,2-Trichloroethane ND 0.20 1/4/24 15:43 KMCND41.10.051 0.28
Trichloroethylene ND 0.20 1/4/24 15:43 KMCND41.10.082 0.44
Trichlorofluoromethane (Freon 11)0.28 0.80 1/4/24 15:43 KMCJ1.6 44.50.082 0.46
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)0.11 0.80 1/4/24 15:43 KMCJ0.86 46.10.044 0.34
1,2,4-Trimethylbenzene ND 0.20 1/4/24 15:43 KMCND40.980.092 0.45
1,3,5-Trimethylbenzene ND 0.20 1/4/24 15:43 KMCND40.980.10 0.51
Vinyl Acetate ND 4.0 1/4/24 15:43 KMCND4140.71 2.5
Vinyl Chloride ND 0.20 1/4/24 15:43 KMCND40.510.091 0.23
m&p-Xylene ND 0.40 1/4/24 15:43 KMCND41.70.14 0.61
o-Xylene 0.076 0.20 1/4/24 15:43 KMCJ0.33 40.870.073 0.32
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)86.9 1/4/24 15:4370-130
Page 6 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-BN1
Sample ID: 24A0185-02
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -27
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -4.2
Sampled: 12/29/2023 15:10
Canister ID: 2652
Flow Controller ID: 4679
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 110 8.0 1/4/24 16:08 KMC270 4191.9 4.5
Benzene 0.12 0.20 1/4/24 16:08 KMCJ0.40 40.640.062 0.20
Benzyl chloride ND 0.80 1/4/24 16:08 KMCND44.10.11 0.56
Bromodichloromethane ND 0.20 1/4/24 16:08 KMCND41.30.054 0.36
Bromoform ND 0.20 1/4/24 16:08 KMCND42.10.071 0.73
Bromomethane ND 0.20 1/4/24 16:08 KMCND40.780.11 0.41
1,3-Butadiene ND 0.20 1/4/24 16:08 KMCND40.440.17 0.37
2-Butanone (MEK)100 8.0 1/4/24 16:08 KMC310 4242.2 6.6
Carbon Disulfide ND 2.0 1/4/24 16:08 KMCND46.20.38 1.2
Carbon Tetrachloride 0.10 0.20 1/4/24 16:08 KMCJ0.65 41.30.058 0.36
Chlorobenzene ND 0.20 1/4/24 16:08 KMCND40.920.050 0.23
Chloroethane ND 0.20 1/4/24 16:08 KMCND40.530.13 0.33
Chloroform ND 0.20 1/4/24 16:08 KMCND40.980.052 0.25
Chloromethane 0.29 0.40 1/4/24 16:08 KMCJ0.60 40.830.082 0.17
Cyclohexane 0.24 0.20 1/4/24 16:08 KMC0.81 40.690.088 0.30
Dibromochloromethane ND 0.20 1/4/24 16:08 KMCND41.70.054 0.46
1,2-Dibromoethane (EDB)ND 0.20 1/4/24 16:08 KMCND41.50.067 0.51
1,2-Dichlorobenzene ND 0.20 1/4/24 16:08 KMCND41.20.070 0.42
1,3-Dichlorobenzene ND 0.20 1/4/24 16:08 KMCND41.20.074 0.45
1,4-Dichlorobenzene ND 0.20 1/4/24 16:08 KMCND41.20.074 0.44
Dichlorodifluoromethane (Freon 12)0.56 0.20 1/4/24 16:08 KMC2.7 40.990.084 0.42
1,1-Dichloroethane ND 0.20 1/4/24 16:08 KMCND40.810.064 0.26
1,2-Dichloroethane ND 0.20 1/4/24 16:08 KMCND40.810.075 0.30
1,1-Dichloroethylene ND 0.20 1/4/24 16:08 KMCND40.790.057 0.23
cis-1,2-Dichloroethylene ND 0.20 1/4/24 16:08 KMCND40.790.062 0.24
trans-1,2-Dichloroethylene ND 0.20 1/4/24 16:08 KMCND40.790.065 0.26
1,2-Dichloropropane ND 0.20 1/4/24 16:08 KMCND40.920.055 0.25
cis-1,3-Dichloropropene ND 0.20 1/4/24 16:08 KMCND40.910.090 0.41
trans-1,3-Dichloropropene ND 0.20 1/4/24 16:08 KMCND40.910.10 0.47
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 1/4/24 16:08 KMCND41.40.080 0.56
1,4-Dioxane ND 2.0 1/4/24 16:08 KMCND47.20.98 3.5
Ethanol 6.9 8.0 1/4/24 16:08 KMCJ13 4155.3 10.0
Ethyl Acetate ND 2.0 1/4/24 16:08 KMCND47.20.58 2.1
Ethylbenzene 0.12 0.20 1/4/24 16:08 KMCJ0.50 40.870.058 0.25
4-Ethyltoluene ND 0.20 1/4/24 16:08 KMCND40.980.087 0.43
Heptane ND 0.20 1/4/24 16:08 KMCND40.820.13 0.52
Hexachlorobutadiene ND 0.20 1/4/24 16:08 KMCND42.10.12 1.2
Hexane ND 8.0 1/4/24 16:08 KMCND4282.6 9.3
2-Hexanone (MBK)ND 0.80 1/4/24 16:08 KMCL-03, V-05 ND 43.30.087 0.35
Isopropanol 4.5 8.0 1/4/24 16:08 KMCJ11 4202.5 6.2
Methyl tert-Butyl Ether (MTBE)ND 0.20 1/4/24 16:08 KMCND40.720.098 0.35
Methylene Chloride ND 2.0 1/4/24 16:08 KMCND46.90.54 1.9
4-Methyl-2-pentanone (MIBK)ND 0.20 1/4/24 16:08 KMCND40.820.11 0.43
Naphthalene ND 0.20 1/4/24 16:08 KMCZ-01 ND 41.00.13 0.70
Propene ND 8.0 1/4/24 16:08 KMCND4142.2 3.7
Styrene ND 0.20 1/4/24 16:08 KMCND40.850.11 0.46
1,1,2,2-Tetrachloroethane ND 0.20 1/4/24 16:08 KMCND41.40.050 0.34
Page 7 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-BN1
Sample ID: 24A0185-02
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -27
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -4.2
Sampled: 12/29/2023 15:10
Canister ID: 2652
Flow Controller ID: 4679
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene ND 0.20 1/4/24 16:08 KMCND41.40.075 0.51
Tetrahydrofuran 1.7 2.0 1/4/24 16:08 KMCJ5.0 45.90.41 1.2
Toluene 0.13 0.20 1/4/24 16:08 KMCJ0.48 40.750.073 0.27
1,2,4-Trichlorobenzene ND 0.20 1/4/24 16:08 KMCV-05 ND 41.50.11 0.80
1,1,1-Trichloroethane ND 0.20 1/4/24 16:08 KMCND41.10.063 0.34
1,1,2-Trichloroethane ND 0.20 1/4/24 16:08 KMCND41.10.051 0.28
Trichloroethylene ND 0.20 1/4/24 16:08 KMCND41.10.082 0.44
Trichlorofluoromethane (Freon 11)0.27 0.80 1/4/24 16:08 KMCJ1.5 44.50.082 0.46
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)0.092 0.80 1/4/24 16:08 KMCJ0.71 46.10.044 0.34
1,2,4-Trimethylbenzene ND 0.20 1/4/24 16:08 KMCND40.980.092 0.45
1,3,5-Trimethylbenzene ND 0.20 1/4/24 16:08 KMCND40.980.10 0.51
Vinyl Acetate ND 4.0 1/4/24 16:08 KMCND4140.71 2.5
Vinyl Chloride ND 0.20 1/4/24 16:08 KMCND40.510.091 0.23
m&p-Xylene 0.28 0.40 1/4/24 16:08 KMCJ1.2 41.70.14 0.61
o-Xylene 0.26 0.20 1/4/24 16:08 KMC1.1 40.870.073 0.32
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)81.9 1/4/24 16:0870-130
Page 8 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-DUP
Sample ID: 24A0185-03
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -27
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -4.1
Sampled: 12/29/2023 00:00
Canister ID: 2851
Flow Controller ID: 4679
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 120 8.0 1/4/24 16:32 KMC280 4191.9 4.5
Benzene 0.076 0.20 1/4/24 16:32 KMCJ0.24 40.640.062 0.20
Benzyl chloride ND 0.80 1/4/24 16:32 KMCND44.10.11 0.56
Bromodichloromethane ND 0.20 1/4/24 16:32 KMCND41.30.054 0.36
Bromoform ND 0.20 1/4/24 16:32 KMCND42.10.071 0.73
Bromomethane ND 0.20 1/4/24 16:32 KMCND40.780.11 0.41
1,3-Butadiene ND 0.20 1/4/24 16:32 KMCND40.440.17 0.37
2-Butanone (MEK)110 8.0 1/4/24 16:32 KMC330 4242.2 6.6
Carbon Disulfide ND 2.0 1/4/24 16:32 KMCND46.20.38 1.2
Carbon Tetrachloride 0.10 0.20 1/4/24 16:32 KMCJ0.63 41.30.058 0.36
Chlorobenzene ND 0.20 1/4/24 16:32 KMCND40.920.050 0.23
Chloroethane ND 0.20 1/4/24 16:32 KMCND40.530.13 0.33
Chloroform 0.056 0.20 1/4/24 16:32 KMCJ0.27 40.980.052 0.25
Chloromethane 0.31 0.40 1/4/24 16:32 KMCJ0.64 40.830.082 0.17
Cyclohexane 0.11 0.20 1/4/24 16:32 KMCJ0.37 40.690.088 0.30
Dibromochloromethane ND 0.20 1/4/24 16:32 KMCND41.70.054 0.46
1,2-Dibromoethane (EDB)ND 0.20 1/4/24 16:32 KMCND41.50.067 0.51
1,2-Dichlorobenzene ND 0.20 1/4/24 16:32 KMCND41.20.070 0.42
1,3-Dichlorobenzene ND 0.20 1/4/24 16:32 KMCND41.20.074 0.45
1,4-Dichlorobenzene ND 0.20 1/4/24 16:32 KMCND41.20.074 0.44
Dichlorodifluoromethane (Freon 12)0.58 0.20 1/4/24 16:32 KMC2.9 40.990.084 0.42
1,1-Dichloroethane ND 0.20 1/4/24 16:32 KMCND40.810.064 0.26
1,2-Dichloroethane ND 0.20 1/4/24 16:32 KMCND40.810.075 0.30
1,1-Dichloroethylene ND 0.20 1/4/24 16:32 KMCND40.790.057 0.23
cis-1,2-Dichloroethylene ND 0.20 1/4/24 16:32 KMCND40.790.062 0.24
trans-1,2-Dichloroethylene ND 0.20 1/4/24 16:32 KMCND40.790.065 0.26
1,2-Dichloropropane ND 0.20 1/4/24 16:32 KMCND40.920.055 0.25
cis-1,3-Dichloropropene ND 0.20 1/4/24 16:32 KMCND40.910.090 0.41
trans-1,3-Dichloropropene ND 0.20 1/4/24 16:32 KMCND40.910.10 0.47
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 1/4/24 16:32 KMCND41.40.080 0.56
1,4-Dioxane ND 2.0 1/4/24 16:32 KMCND47.20.98 3.5
Ethanol 9.2 8.0 1/4/24 16:32 KMC17 4155.3 10.0
Ethyl Acetate ND 2.0 1/4/24 16:32 KMCND47.20.58 2.1
Ethylbenzene 0.11 0.20 1/4/24 16:32 KMCJ0.49 40.870.058 0.25
4-Ethyltoluene ND 0.20 1/4/24 16:32 KMCND40.980.087 0.43
Heptane ND 0.20 1/4/24 16:32 KMCND40.820.13 0.52
Hexachlorobutadiene ND 0.20 1/4/24 16:32 KMCND42.10.12 1.2
Hexane ND 8.0 1/4/24 16:32 KMCND4282.6 9.3
2-Hexanone (MBK)ND 0.80 1/4/24 16:32 KMCL-03, V-05 ND 43.30.087 0.35
Isopropanol 5.0 8.0 1/4/24 16:32 KMCJ12 4202.5 6.2
Methyl tert-Butyl Ether (MTBE)ND 0.20 1/4/24 16:32 KMCND40.720.098 0.35
Methylene Chloride ND 2.0 1/4/24 16:32 KMCND46.90.54 1.9
4-Methyl-2-pentanone (MIBK)ND 0.20 1/4/24 16:32 KMCND40.820.11 0.43
Naphthalene ND 0.20 1/4/24 16:32 KMCZ-01 ND 41.00.13 0.70
Propene ND 8.0 1/4/24 16:32 KMCND4142.2 3.7
Styrene ND 0.20 1/4/24 16:32 KMCND40.850.11 0.46
1,1,2,2-Tetrachloroethane ND 0.20 1/4/24 16:32 KMCND41.40.050 0.34
Page 9 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-DUP
Sample ID: 24A0185-03
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -27
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -4.1
Sampled: 12/29/2023 00:00
Canister ID: 2851
Flow Controller ID: 4679
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene ND 0.20 1/4/24 16:32 KMCND41.40.075 0.51
Tetrahydrofuran 2.0 2.0 1/4/24 16:32 KMCJ5.8 45.90.41 1.2
Toluene 0.14 0.20 1/4/24 16:32 KMCJ0.54 40.750.073 0.27
1,2,4-Trichlorobenzene ND 0.20 1/4/24 16:32 KMCV-05 ND 41.50.11 0.80
1,1,1-Trichloroethane ND 0.20 1/4/24 16:32 KMCND41.10.063 0.34
1,1,2-Trichloroethane ND 0.20 1/4/24 16:32 KMCND41.10.051 0.28
Trichloroethylene ND 0.20 1/4/24 16:32 KMCND41.10.082 0.44
Trichlorofluoromethane (Freon 11)0.28 0.80 1/4/24 16:32 KMCJ1.6 44.50.082 0.46
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)0.092 0.80 1/4/24 16:32 KMCJ0.71 46.10.044 0.34
1,2,4-Trimethylbenzene ND 0.20 1/4/24 16:32 KMCND40.980.092 0.45
1,3,5-Trimethylbenzene ND 0.20 1/4/24 16:32 KMCND40.980.10 0.51
Vinyl Acetate ND 4.0 1/4/24 16:32 KMCND4140.71 2.5
Vinyl Chloride ND 0.20 1/4/24 16:32 KMCND40.510.091 0.23
m&p-Xylene 0.32 0.40 1/4/24 16:32 KMCJ1.4 41.70.14 0.61
o-Xylene 0.28 0.20 1/4/24 16:32 KMC1.2 40.870.073 0.32
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)87.4 1/4/24 16:3270-130
Page 10 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-BS1
Sample ID: 24A0185-04
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -4.4
Sampled: 12/29/2023 15:40
Canister ID: 2232
Flow Controller ID: 4528
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Acetone 180 8.0 1/4/24 16:57 KMC440 4191.9 4.5
Benzene 0.068 0.20 1/4/24 16:57 KMCJ0.22 40.640.062 0.20
Benzyl chloride ND 0.80 1/4/24 16:57 KMCND44.10.11 0.56
Bromodichloromethane ND 0.20 1/4/24 16:57 KMCND41.30.054 0.36
Bromoform ND 0.20 1/4/24 16:57 KMCND42.10.071 0.73
Bromomethane ND 0.20 1/4/24 16:57 KMCND40.780.11 0.41
1,3-Butadiene ND 0.20 1/4/24 16:57 KMCND40.440.17 0.37
2-Butanone (MEK)270 20 1/4/24 17:22 KMC790 10595.6 17
Carbon Disulfide ND 2.0 1/4/24 16:57 KMCND46.20.38 1.2
Carbon Tetrachloride 0.072 0.20 1/4/24 16:57 KMCJ0.45 41.30.058 0.36
Chlorobenzene ND 0.20 1/4/24 16:57 KMCND40.920.050 0.23
Chloroethane ND 0.20 1/4/24 16:57 KMCND40.530.13 0.33
Chloroform ND 0.20 1/4/24 16:57 KMCND40.980.052 0.25
Chloromethane 0.38 0.40 1/4/24 16:57 KMCJ0.78 40.830.082 0.17
Cyclohexane 0.52 0.20 1/4/24 16:57 KMC1.8 40.690.088 0.30
Dibromochloromethane ND 0.20 1/4/24 16:57 KMCND41.70.054 0.46
1,2-Dibromoethane (EDB)ND 0.20 1/4/24 16:57 KMCND41.50.067 0.51
1,2-Dichlorobenzene ND 0.20 1/4/24 16:57 KMCND41.20.070 0.42
1,3-Dichlorobenzene ND 0.20 1/4/24 16:57 KMCND41.20.074 0.45
1,4-Dichlorobenzene ND 0.20 1/4/24 16:57 KMCND41.20.074 0.44
Dichlorodifluoromethane (Freon 12)0.56 0.20 1/4/24 16:57 KMC2.8 40.990.084 0.42
1,1-Dichloroethane ND 0.20 1/4/24 16:57 KMCND40.810.064 0.26
1,2-Dichloroethane ND 0.20 1/4/24 16:57 KMCND40.810.075 0.30
1,1-Dichloroethylene ND 0.20 1/4/24 16:57 KMCND40.790.057 0.23
cis-1,2-Dichloroethylene ND 0.20 1/4/24 16:57 KMCND40.790.062 0.24
trans-1,2-Dichloroethylene ND 0.20 1/4/24 16:57 KMCND40.790.065 0.26
1,2-Dichloropropane ND 0.20 1/4/24 16:57 KMCND40.920.055 0.25
cis-1,3-Dichloropropene ND 0.20 1/4/24 16:57 KMCND40.910.090 0.41
trans-1,3-Dichloropropene ND 0.20 1/4/24 16:57 KMCND40.910.10 0.47
1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)ND 0.20 1/4/24 16:57 KMCND41.40.080 0.56
1,4-Dioxane ND 2.0 1/4/24 16:57 KMCND47.20.98 3.5
Ethanol 10 8.0 1/4/24 16:57 KMC20 4155.3 10.0
Ethyl Acetate ND 2.0 1/4/24 16:57 KMCND47.20.58 2.1
Ethylbenzene 0.22 0.20 1/4/24 16:57 KMC0.97 40.870.058 0.25
4-Ethyltoluene ND 0.20 1/4/24 16:57 KMCND40.980.087 0.43
Heptane ND 0.20 1/4/24 16:57 KMCND40.820.13 0.52
Hexachlorobutadiene ND 0.20 1/4/24 16:57 KMCND42.10.12 1.2
Hexane ND 8.0 1/4/24 16:57 KMCND4282.6 9.3
2-Hexanone (MBK)ND 0.80 1/4/24 16:57 KMCL-03, V-05 ND 43.30.087 0.35
Isopropanol 22 8.0 1/4/24 16:57 KMC54 4202.5 6.2
Methyl tert-Butyl Ether (MTBE)ND 0.20 1/4/24 16:57 KMCND40.720.098 0.35
Methylene Chloride ND 2.0 1/4/24 16:57 KMCND46.90.54 1.9
4-Methyl-2-pentanone (MIBK)ND 0.20 1/4/24 16:57 KMCND40.820.11 0.43
Naphthalene ND 0.20 1/4/24 16:57 KMCZ-01 ND 41.00.13 0.70
Propene ND 8.0 1/4/24 16:57 KMCND4142.2 3.7
Styrene ND 0.20 1/4/24 16:57 KMCND40.850.11 0.46
1,1,2,2-Tetrachloroethane ND 0.20 1/4/24 16:57 KMCND41.40.050 0.34
Page 11 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYTICAL RESULTS
Project Location: Charlotte, NC
Date Received: 1/3/2024
Work Order: 24A0185Sample Description/Location:
Field Sample #: MP-BS1
Sample ID: 24A0185-04
Sample Matrix: Sub Slab
Initial Vacuum(in Hg): -28
Final Vacuum(in Hg): -5
Receipt Vacuum(in Hg): -4.4
Sampled: 12/29/2023 15:40
Canister ID: 2232
Flow Controller ID: 4528
Sub Description/Location:
Canister Size: 1 liter
Flow Controller Type: Fixed-Orifice
Flow Controller Calibration
RPD Pre and Post-Sampling:
Sample Type: 10 min
RLResults AnalystAnalyzedDilutionFlag/QualRLResultsAnalyte
Date/Time
EPA TO-15
ppbv ug/m3
MDL MDL
Tetrachloroethylene ND 0.20 1/4/24 16:57 KMCND41.40.075 0.51
Tetrahydrofuran 5.5 2.0 1/4/24 16:57 KMC16 45.90.41 1.2
Toluene 0.14 0.20 1/4/24 16:57 KMCJ0.51 40.750.073 0.27
1,2,4-Trichlorobenzene ND 0.20 1/4/24 16:57 KMCV-05 ND 41.50.11 0.80
1,1,1-Trichloroethane ND 0.20 1/4/24 16:57 KMCND41.10.063 0.34
1,1,2-Trichloroethane ND 0.20 1/4/24 16:57 KMCND41.10.051 0.28
Trichloroethylene ND 0.20 1/4/24 16:57 KMCND41.10.082 0.44
Trichlorofluoromethane (Freon 11)0.27 0.80 1/4/24 16:57 KMCJ1.5 44.50.082 0.46
1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)0.10 0.80 1/4/24 16:57 KMCJ0.77 46.10.044 0.34
1,2,4-Trimethylbenzene 0.14 0.20 1/4/24 16:57 KMCJ0.67 40.980.092 0.45
1,3,5-Trimethylbenzene ND 0.20 1/4/24 16:57 KMCND40.980.10 0.51
Vinyl Acetate ND 4.0 1/4/24 16:57 KMCND4140.71 2.5
Vinyl Chloride ND 0.20 1/4/24 16:57 KMCND40.510.091 0.23
m&p-Xylene 0.85 0.40 1/4/24 16:57 KMC3.7 41.70.14 0.61
o-Xylene 0.61 0.20 1/4/24 16:57 KMC2.6 40.870.073 0.32
Surrogates % Recovery % REC Limits
4-Bromofluorobenzene (1)84.8 1/4/24 17:2270-130
4-Bromofluorobenzene (1)96.3 1/4/24 16:5770-130
Page 12 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Sample Extraction Data
Prep Method: TO-15 Prep-EPA TO-15
Lab Number [Field ID]Batch Date
Pressure
Dilution
Pre
Dilution
Pre-Dil
Initial
mL
Pre-Dil
Final
mL
Default
Injection
mL
Actual
Injection
mL
24A0185-01 [MP-A1]B362659 1.5 1 N/A 1000 200 75 01/04/24
24A0185-02 [MP-BN1]B362659 1.5 1 N/A 1000 200 75 01/04/24
24A0185-03 [MP-DUP]B362659 1.5 1 N/A 1000 200 75 01/04/24
24A0185-04 [MP-BS1]B362659 1.5 1 N/A 1000 200 75 01/04/24
24A0185-04RE1 [MP-BS1]B362659 1.5 1 N/A 1000 200 30 01/04/24
Page 13 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ug/m3 Spike Level
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Flag/Qual Analyte
Air Toxics by EPA Compendium Methods - Quality Control
QUALITY CONTROL
RL
ppbv
Results RL Results ppbv
Batch B362659 - TO-15 Prep
Blank (B362659-BLK1)Prepared & Analyzed: 01/04/24
0.80NDAcetone
0.020NDBenzene
0.020NDBenzyl chloride
0.020NDBromodichloromethane
0.020NDBromoform
0.020NDBromomethane
0.020ND1,3-Butadiene
0.80ND2-Butanone (MEK)
0.20NDCarbon Disulfide
0.020NDCarbon Tetrachloride
0.020NDChlorobenzene
0.020NDChloroethane
0.020NDChloroform
0.040NDChloromethane
0.020NDCyclohexane
0.020NDDibromochloromethane
0.020ND1,2-Dibromoethane (EDB)
0.020ND1,2-Dichlorobenzene
0.020ND1,3-Dichlorobenzene
0.020ND1,4-Dichlorobenzene
0.020NDDichlorodifluoromethane (Freon 12)
0.020ND1,1-Dichloroethane
0.020ND1,2-Dichloroethane
0.020ND1,1-Dichloroethylene
0.020NDcis-1,2-Dichloroethylene
0.020NDtrans-1,2-Dichloroethylene
0.020ND1,2-Dichloropropane
0.020NDcis-1,3-Dichloropropene
0.020NDtrans-1,3-Dichloropropene
0.020ND1,2-Dichloro-1,1,2,2-tetrafluoroethane
(Freon 114)
0.20ND1,4-Dioxane
0.80NDEthanol
0.20NDEthyl Acetate
0.020NDEthylbenzene
0.020ND4-Ethyltoluene
0.020NDHeptane
0.020NDHexachlorobutadiene
0.80NDHexane
0.020 L-03, V-05ND2-Hexanone (MBK)
0.80NDIsopropanol
0.020NDMethyl tert-Butyl Ether (MTBE)
0.20NDMethylene Chloride
0.020ND4-Methyl-2-pentanone (MIBK)
0.020 Z-01NDNaphthalene
0.80NDPropene
0.020NDStyrene
Page 14 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ug/m3 Spike Level
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Flag/Qual Analyte
Air Toxics by EPA Compendium Methods - Quality Control
QUALITY CONTROL
RL
ppbv
Results RL Results ppbv
Batch B362659 - TO-15 Prep
Blank (B362659-BLK1)Prepared & Analyzed: 01/04/24
0.020ND1,1,2,2-Tetrachloroethane
0.020NDTetrachloroethylene
0.20NDTetrahydrofuran
0.020NDToluene
0.020 V-05ND1,2,4-Trichlorobenzene
0.020ND1,1,1-Trichloroethane
0.020ND1,1,2-Trichloroethane
0.020NDTrichloroethylene
0.080NDTrichlorofluoromethane (Freon 11)
0.080ND1,1,2-Trichloro-1,2,2-trifluoroethane (Freon
113)
0.020ND1,2,4-Trimethylbenzene
0.020ND1,3,5-Trimethylbenzene
0.40NDVinyl Acetate
0.020NDVinyl Chloride
0.040NDm&p-Xylene
0.020NDo-Xylene
8.00 70-130Surrogate: 4-Bromofluorobenzene (1)89.67.17
LCS (B362659-BS1)Prepared & Analyzed: 01/04/24
5.00 70-13078.63.93Acetone
5.00 70-13084.54.22Benzene
5.00 70-13078.23.91Benzyl chloride
5.00 70-13087.74.39Bromodichloromethane
5.00 70-1301085.41Bromoform
5.00 70-1301105.49Bromomethane
5.00 70-13092.14.611,3-Butadiene
5.00 70-13090.14.502-Butanone (MEK)
5.00 70-13099.74.98Carbon Disulfide
5.00 70-1301015.05Carbon Tetrachloride
5.00 70-13098.34.92Chlorobenzene
5.00 70-13092.64.63Chloroethane
5.00 70-1301165.80Chloroform
5.00 70-13083.44.17Chloromethane
5.00 70-13085.54.28Cyclohexane
5.00 70-1301135.67Dibromochloromethane
5.00 70-1301025.111,2-Dibromoethane (EDB)
5.00 70-1301155.731,2-Dichlorobenzene
5.00 70-1301185.911,3-Dichlorobenzene
5.00 70-1301105.501,4-Dichlorobenzene
5.00 70-1301195.94Dichlorodifluoromethane (Freon 12)
5.00 70-1301085.381,1-Dichloroethane
5.00 70-1301045.201,2-Dichloroethane
5.00 70-13089.44.471,1-Dichloroethylene
5.00 70-1301015.06cis-1,2-Dichloroethylene
5.00 70-1301065.32trans-1,2-Dichloroethylene
5.00 70-13078.53.931,2-Dichloropropane
Page 15 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ug/m3 Spike Level
Result
Source
%REC
%REC
Limits RPD
RPD
Limit Flag/Qual Analyte
Air Toxics by EPA Compendium Methods - Quality Control
QUALITY CONTROL
RL
ppbv
Results RL Results ppbv
Batch B362659 - TO-15 Prep
LCS (B362659-BS1)Prepared & Analyzed: 01/04/24
5.00 70-13086.34.32cis-1,3-Dichloropropene
5.00 70-13096.84.84trans-1,3-Dichloropropene
5.00 70-13099.14.961,2-Dichloro-1,1,2,2-tetrafluoroethane
(Freon 114)
5.00 70-13089.64.481,4-Dioxane
5.00 70-13097.64.88Ethanol
5.00 70-13086.44.32Ethyl Acetate
5.00 70-13090.34.52Ethylbenzene
5.00 70-13098.34.914-Ethyltoluene
5.00 70-13082.04.10Heptane
4.25 L-0170-1302008.50Hexachlorobutadiene *
5.00 70-13090.24.51Hexane
5.00 L-03, V-0570-13065.43.272-Hexanone (MBK)*
5.00 70-13070.33.52Isopropanol
5.00 70-1301085.40Methyl tert-Butyl Ether (MTBE)
5.00 70-13072.93.64Methylene Chloride
5.00 70-13081.34.064-Methyl-2-pentanone (MIBK)
3.68 Z-0170-1301284.73Naphthalene
5.00 70-1301065.32Propene
5.00 70-1301005.01Styrene
5.00 70-13097.84.891,1,2,2-Tetrachloroethane
5.00 70-13097.14.85Tetrachloroethylene
5.00 70-13092.34.61Tetrahydrofuran
5.00 70-13095.34.76Toluene
3.90 V-0570-1301034.011,2,4-Trichlorobenzene
5.00 70-13092.94.641,1,1-Trichloroethane
5.00 70-1301045.221,1,2-Trichloroethane
5.00 70-13092.34.62Trichloroethylene
5.00 70-1301165.80Trichlorofluoromethane (Freon 11)
5.00 70-1301075.351,1,2-Trichloro-1,2,2-trifluoroethane (Freon
113)
5.00 70-1301095.431,2,4-Trimethylbenzene
5.00 70-1301165.811,3,5-Trimethylbenzene
5.00 70-1301135.64Vinyl Acetate
5.00 70-13093.64.68Vinyl Chloride
10.0 70-13010610.6m&p-Xylene
5.00 70-1301065.29o-Xylene
8.00 70-130Surrogate: 4-Bromofluorobenzene (1)98.97.91
Page 16 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
Note: Blank Subtraction is not performed unless otherwise noted
*QC result is outside of established limits.
Wide recovery limits established for difficult compound.
Wide RPD limits established for difficult compound.
#Data exceeded client recommended or regulatory level
RL Reporting Limit
MDL Method Detection Limit
RPD Relative Percent Difference
LCS Laboratory Control Sample
Laboratory Control SampleLCS Dup Duplicate Laboratory Control Sample
MS Matrix Spike Sample
MS Dup Duplicate Matrix Spike Sample
REC Recovery
QC Quality Control
ppbv Parts per billion volume
EPA United States Environmental Protection Agency
Percent Recovery% REC
ND Not Detected
Percent recoveries and relative percent differences (RPDs) are determined by the software using values in the
calculation which have not been rounded.
Not ApplicableN/A
DL Detection Limit
Not CalculatedNC
LFB/LCS Lab Fortified Blank/Lab Control Sample
ORP Oxidation-Reduction Potential
Not dry weight correctedwet
Percent weight% wt
KilogramKg
Gramg
Milligrammg
Microgramg
Nanogramng
LiterL
MillilitermL
Microliter L
Cubic Meterm3
Extractable Petroleum HydrocarbonsEPH
Volatile Petroleum HydrocarbonsVPH
Air Petroleum HydrocarbonsAPH
Flame Ionization DetectorFID
Photo Ionization DetectorPID
FLAG/QUALIFIER SUMMARY
Detected but below the Reporting Limit (lowest calibration standard); therefore, result is an estimated
concentration (CLP J-Flag).
J
Laboratory fortified blank/laboratory control sample recovery outside of control limits. Data validation is not
affected since all results are "not detected" for all samples in this batch for this compound and bias is on the high
side.
L-01
Laboratory fortified blank/laboratory control sample recovery is outside of control limits. Reported value for this
compound is likely to be biased on the low side.
L-03
Continuing calibration verification (CCV) did not meet method specifications and was biased on the low side for
this compound.
V-05
Continuing calibration verification (CCV) did not meet method specifications and was biased on the high side for
this compound.
V-06
Calibrations RSD for this compound is >30% but <40%.Z-01
Page 17 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
ANALYST
Thomas P. HniteckiTPH
Rebecca FaustRLF
Kristen M CoutureKMC
Page 18 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
INTERNAL STANDARD AREA AND RT SUMMARY
EPA TO-15
RTResponseInternal Standard Area %RT DiffResponse
Reference
RT
Reference Area %
Limits
RT Diff
Limit Q
Initial Cal Check (S085380-ICV1 )Lab File ID: J23A090036.D Analyzed: 04/01/23 05:53
Bromochloromethane (1)298104 2.788 289065 2.788 60 - 140103 0.0000 +/-0.50
1,4-Difluorobenzene (1)850179 3.418 804638 3.418 60 - 140106 0.0000 +/-0.50
Chlorobenzene-d5 (1)747035 5.036 717694 5.036 60 - 140104 0.0000 +/-0.50
INTERNAL STANDARD AREA AND RT SUMMARY
EPA TO-15
RTResponseInternal Standard Area %RT DiffResponse
Reference
RT
Reference Area %
Limits
RT Diff
Limit Q
Calibration Check (S098880-CCV1 )Lab File ID: J24A004003.D Analyzed: 01/04/24 09:51
Bromochloromethane (1)198739 2.807 289065 2.788 60 - 14069 0.0190 +/-0.50
1,4-Difluorobenzene (1)695156 3.433 804638 3.418 60 - 14086 0.0150 +/-0.50
Chlorobenzene-d5 (1)571738 5.04 717694 5.036 60 - 14080 0.0040 +/-0.50
LCS (B362659-BS1 )Lab File ID: J24A004004.D Analyzed: 01/04/24 10:16
Bromochloromethane (1)201970 2.806 198739 2.807 60 - 140102 -0.0010 +/-0.50
1,4-Difluorobenzene (1)705621 3.433 695156 3.433 60 - 140102 0.0000 +/-0.50
Chlorobenzene-d5 (1)587994 5.04 571738 5.04 60 - 140103 0.0000 +/-0.50
Blank (B362659-BLK1 )Lab File ID: J24A004007.D Analyzed: 01/04/24 11:43
Bromochloromethane (1)187189 2.782 198739 2.807 60 - 14094 -0.0250 +/-0.50
1,4-Difluorobenzene (1)545184 3.417 695156 3.433 60 - 14078 -0.0160 +/-0.50
Chlorobenzene-d5 (1)467596 5.037 571738 5.04 60 - 14082 -0.0030 +/-0.50
MP-A1 (24A0185-01 )Lab File ID: J24A004015.D Analyzed: 01/04/24 15:43
Bromochloromethane (1)188418 2.787 198739 2.807 60 - 14095 -0.0200 +/-0.50
1,4-Difluorobenzene (1)568147 3.418 695156 3.433 60 - 14082 -0.0150 +/-0.50
Chlorobenzene-d5 (1)498244 5.038 571738 5.04 60 - 14087 -0.0020 +/-0.50
MP-BN1 (24A0185-02 )Lab File ID: J24A004016.D Analyzed: 01/04/24 16:08
Bromochloromethane (1)194277 2.787 198739 2.807 60 - 14098 -0.0200 +/-0.50
1,4-Difluorobenzene (1)576335 3.417 695156 3.433 60 - 14083 -0.0160 +/-0.50
Chlorobenzene-d5 (1)490059 5.033 571738 5.04 60 - 14086 -0.0070 +/-0.50
MP-DUP (24A0185-03 )Lab File ID: J24A004017.D Analyzed: 01/04/24 16:32
Bromochloromethane (1)189098 2.787 198739 2.807 60 - 14095 -0.0200 +/-0.50
1,4-Difluorobenzene (1)570853 3.418 695156 3.433 60 - 14082 -0.0150 +/-0.50
Chlorobenzene-d5 (1)489157 5.033 571738 5.04 60 - 14086 -0.0070 +/-0.50
MP-BS1 (24A0185-04 )Lab File ID: J24A004018.D Analyzed: 01/04/24 16:57
Bromochloromethane (1)189969 2.787 198739 2.807 60 - 14096 -0.0200 +/-0.50
1,4-Difluorobenzene (1)581741 3.418 695156 3.433 60 - 14084 -0.0150 +/-0.50
Chlorobenzene-d5 (1)505717 5.034 571738 5.04 60 - 14088 -0.0060 +/-0.50
Page 19 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
INTERNAL STANDARD AREA AND RT SUMMARY
EPA TO-15
RTResponseInternal Standard Area %RT DiffResponse
Reference
RT
Reference Area %
Limits
RT Diff
Limit Q
MP-BS1 (24A0185-04RE1 )Lab File ID: J24A004019.D Analyzed: 01/04/24 17:22
Bromochloromethane (1)187688 2.787 198739 2.807 60 - 14094 -0.0200 +/-0.50
1,4-Difluorobenzene (1)558114 3.418 695156 3.433 60 - 14080 -0.0150 +/-0.50
Chlorobenzene-d5 (1)476777 5.033 571738 5.04 60 - 14083 -0.0070 +/-0.50
Page 20 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S098880-CCV1
COMPOUND TYPE CCV MIN (#)CCV LIMIT (#)CCV ICAL
CONC. (ppbv)% DIFF / DRIFTRESPONSE FACTOR
STD
0.827908A -19.9 304.00 1.0341145.00Acetone
0.7088251A -12.7 304.36 0.81236455.00Benzene
0.5737649L -24.0 303.80 0.50568525.00Benzyl chloride
0.5573034A -8.6 304.57 0.60943425.00Bromodichloromethane
0.4891639A 6.9 305.35 0.45738395.00Bromoform
0.7673018A 13.5 305.67 0.67619595.00Bromomethane
0.49707A -2.4 304.88 0.50922575.001,3-Butadiene
1.010684A -12.0 304.40 1.1486475.002-Butanone (MEK)
1.99022A -0.5 304.97 2.0011545.00Carbon Disulfide
0.4572625A -9.2 304.54 0.50370675.00Carbon Tetrachloride
0.7950047A 4.3 305.22 0.76227735.00Chlorobenzene
0.4083265A -2.8 304.86 0.42021375.00Chloroethane
1.894601A 20.1 306.00 1.5778375.00Chloroform
0.5261413A -11.8 304.41 0.59663745.00Chloromethane
0.2737204A -15.7 304.22 0.32464065.00Cyclohexane
0.5931976A 14.3 305.72 0.51898365.00Dibromochloromethane
0.5398892A 8.8 305.44 0.49608645.001,2-Dibromoethane (EDB)
0.5599432A 14.0 305.70 0.49119515.001,2-Dichlorobenzene
0.6448632A 18.2 305.91 0.54568085.001,3-Dichlorobenzene
0.5875474A 10.7 305.53 0.53099265.001,4-Dichlorobenzene
2.246822A 24.2 306.21 1.8092855.00Dichlorodifluoromethane (Freon 12)
1.458089A 10.7 305.53 1.3174275.001,1-Dichloroethane
1.050978A 8.0 305.40 0.97309115.001,2-Dichloroethane
1.068215A -6.9 304.66 1.1468455.001,1-Dichloroethylene
0.9986565A 4.9 305.24 0.95241035.00cis-1,2-Dichloroethylene
1.111794A 8.0 305.40 1.029795.00trans-1,2-Dichloroethylene
0.2441282A -19.5 304.02 0.30336955.001,2-Dichloropropane
0.3904045A -3.4 304.83 0.40427695.00cis-1,3-Dichloropropene
0.296608A -9.6 304.52 0.32794155.00trans-1,3-Dichloropropene
2.16361A 10.1 305.51 1.9648885.001,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
0.1259896A -22.5 303.88 0.16247845.001,4-Dioxane
0.1327168A -23.0 303.85 0.17242025.00Ethanol
0.1743312A -14.5 304.27 0.20400165.00Ethyl Acetate
1.239843A -4.2 304.79 1.2937945.00Ethylbenzene
1.137951A -3.0 304.85 1.1736015.004-Ethyltoluene
0.1985718A -16.9 304.15 0.23902285.00Heptane
0.3588833A 58.7 *307.93 0.22615635.00Hexachlorobutadiene
0.6114311L -9.8 304.51 0.67384965.00Hexane
Page 21 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CONTINUING CALIBRATION CHECK
EPA TO-15
S098880-CCV1
COMPOUND TYPE CCV MIN (#)CCV LIMIT (#)CCV ICAL
CONC. (ppbv)% DIFF / DRIFTRESPONSE FACTOR
STD
0.2880536A -33.3 *303.33 0.43206765.002-Hexanone (MBK)
0.8197203A -29.5 303.52 1.1631665.00Isopropanol
1.870803A 6.7 305.34 1.7528875.00Methyl tert-Butyl Ether (MTBE)
0.6159153A -24.5 303.77 0.81611845.00Methylene Chloride
0.1596304A -19.9 304.01 0.19916765.004-Methyl-2-pentanone (MIBK)
0.32496A -21.5 303.92 0.41409145.00Naphthalene
0.4153307A 9.8 305.49 0.37835665.00Propene
0.6627007A 7.0 305.35 0.61933875.00Styrene
0.7910085A 0.4 305.02 0.78754535.001,1,2,2-Tetrachloroethane
0.4204443A 3.5 305.18 0.40610335.00Tetrachloroethylene
0.4634742A -17.3 304.14 0.56022635.00Tetrahydrofuran
0.976993A -1.8 304.91 0.99527375.00Toluene
0.1320801A -32.3 *303.38 0.19512365.001,2,4-Trichlorobenzene
0.5210088A 1.2 305.06 0.51483625.001,1,1-Trichloroethane
0.3764018A 7.7 305.39 0.34940555.001,1,2-Trichloroethane
0.3294087A -5.1 304.75 0.34695885.00Trichloroethylene
2.212872A 20.8 306.04 1.8322275.00Trichlorofluoromethane (Freon 11)
1.546334A 13.4 305.67 1.3637575.001,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
1.031952A 14.2 305.71 0.90357815.001,2,4-Trimethylbenzene
1.161998A 20.4 306.02 0.96516195.001,3,5-Trimethylbenzene
1.360699A 17.2 305.86 1.1608675.00Vinyl Acetate
0.7207362A -1.7 304.92 0.73308675.00Vinyl Chloride
1.12607A 11.5 3011.1 1.01021810.0m&p-Xylene
1.105956A 12.1 305.61 0.98623055.00o-Xylene
* Values outside of QC limits
# Column to be used to flag Response Factor and %Diff/Drift values with an asterisk
Page 22 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CertificationsAnalyte
CERTIFICATIONS
Certified Analyses included in this Report
EPA TO-15 in Air
NY,ME,NHAcetone
FL,NJ,NY,ME,NH,VABenzene
FL,NJ,NY,ME,NH,VABenzyl chloride
NJ,NY,ME,NH,VABromodichloromethane
NJ,NY,ME,NH,VABromoform
FL,NJ,NY,ME,NHBromomethane
NJ,NY,ME,NH,VA1,3-Butadiene
FL,NJ,NY,ME,NH,VA2-Butanone (MEK)
NJ,NY,ME,NH,VACarbon Disulfide
FL,NJ,NY,ME,NH,VACarbon Tetrachloride
FL,NJ,NY,ME,NH,VAChlorobenzene
FL,NJ,NY,ME,NH,VAChloroethane
FL,NJ,NY,ME,NH,VAChloroform
FL,NJ,NY,ME,NH,VAChloromethane
NJ,NY,ME,NH,VACyclohexane
NY,ME,NHDibromochloromethane
NJ,NY,ME,NH1,2-Dibromoethane (EDB)
FL,NJ,NY,ME,NH,VA1,2-Dichlorobenzene
NJ,NY,ME,NH1,3-Dichlorobenzene
FL,NJ,NY,ME,NH,VA1,4-Dichlorobenzene
NY,ME,NHDichlorodifluoromethane (Freon 12)
FL,NJ,NY,ME,NH,VA1,1-Dichloroethane
FL,NJ,NY,ME,NH,VA1,2-Dichloroethane
FL,NJ,NY,ME,NH,VA1,1-Dichloroethylene
FL,NY,ME,NH,VAcis-1,2-Dichloroethylene
NJ,NY,ME,NH,VAtrans-1,2-Dichloroethylene
FL,NJ,NY,ME,NH,VA1,2-Dichloropropane
FL,NJ,NY,ME,NH,VAcis-1,3-Dichloropropene
NY,ME,NHtrans-1,3-Dichloropropene
NJ,NY,ME,NH,VA1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)
NJ,NY,ME,NH,VA1,4-Dioxane
FL,NJ,NY,ME,NH,VAEthylbenzene
NJ,NY,ME,NH,VAHeptane
NJ,NY,ME,NH,VAHexachlorobutadiene
FL,NJ,NY,ME,NH,VAHexane
NY,ME,NHIsopropanol
FL,NJ,NY,ME,NH,VAMethyl tert-Butyl Ether (MTBE)
FL,NJ,NY,ME,NH,VAMethylene Chloride
FL,NJ,NY,ME,NH4-Methyl-2-pentanone (MIBK)
NY,ME,NHNaphthalene
FL,NJ,NY,ME,NH,VAStyrene
FL,NJ,NY,ME,NH,VA1,1,2,2-Tetrachloroethane
FL,NJ,NY,ME,NH,VATetrachloroethylene
FL,NJ,NY,ME,NH,VAToluene
NJ,NY,ME,NH,VA1,2,4-Trichlorobenzene
FL,NJ,NY,ME,NH,VA1,1,1-Trichloroethane
FL,NJ,NY,ME,NH,VA1,1,2-Trichloroethane
Page 23 of 27
39 Spruce Street * East Longmeadow, MA 01028 * FAX [phone] * TEL. [phone]
CertificationsAnalyte
CERTIFICATIONS
Certified Analyses included in this Report
EPA TO-15 in Air
FL,NJ,NY,ME,NH,VATrichloroethylene
NY,ME,NHTrichlorofluoromethane (Freon 11)
NJ,NY,ME,NH,VA1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)
NJ,NY,ME,NH1,2,4-Trimethylbenzene
NJ,NY,ME,NH1,3,5-Trimethylbenzene
FL,NJ,NY,ME,NH,VAVinyl Acetate
FL,NJ,NY,ME,NH,VAVinyl Chloride
FL,NJ,NY,ME,NH,VAm&p-Xylene
FL,NJ,NY,ME,NH,VAo-Xylene
Con-Test, a Pace Environmental Laboratory, operates under the following certifications and accreditations:
Code Description Number Expires
10899 NELAPNew York State Department of HealthNY 04/1/2024
2516 NELAPNew Hampshire Environmental LabNH 02/5/2024
MA007 NELAPNew Jersey DEPNJ 06/30/2024
E871027 NELAPFlorida Department of HealthFL 06/30/2024
MA00100State of MaineME 06/9/2025
460217Commonwealth of VirginiaVA 12/14/2024
Page 24 of 27
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Page 26 of 27
Page 27 of 27

Appendix G
DEQ Risk Calculators

Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Western Portion of Site - Worst Case
North Carolina Department of Environmental Quality
Risk Calculator
South Hollis LoSo Brownfields Site
South Boulevard and Hollis Road
Division of Waste Management - Brownfields Program
24062-20-060
July 2023
May 2023 EPA RSL Table
1/15/2024
Prepared By:Hart & Hickman, PC
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: July 2023
Basis: May 2023 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Western Portion of Site - Worst Case
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
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 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
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/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
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 4D 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
Output Section 4 - Contaminant Migration Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: July 2023
Basis: May 2023 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Western Portion of Site - Worst Case
Description of Exposure Point Concentration Selection:
Exposure Point
Concentration
(ug/m3)
Notes:CAS Number Chemical Minimum
Concentration
(Qualifier)
Maximum
Concentration
(Qualifier)
Units Location of
Maximum
Concentration
Detection
Frequency
Range of
Detection
Limits
Concentration
Used for
Screening
Background
Value
Screening Toxicity Value
(Screening Level) (n/c)
Potential
ARAR/TBC
Value
Potential
ARAR/TBC
Source
COPC Flag
(Y/N)
Rationale for
Selection or
Deletion
440 MP-BS1 67-64-1 Acetone ug/m3
0.59 MP-A1 71-43-2 Benzene ug/m3
0.65 MP-BN1 56-23-5 Carbon Tetrachloride ug/m3
0.27 MP-DUP 67-66-3 Chloroform ug/m3
1.1 MP-A1 74-87-3 Chloromethane ug/m3
1.8 MP-BS1 110-82-7 Cyclohexane ug/m3
4.6 MP-A1 75-71-8 Dichlorodifluoromethane ug/m3
0.97 MP-BS1 100-41-4 Ethylbenzene ug/m3
16 MP-BS1 109-99-9 ~Tetrahydrofuran ug/m3
0.54 MP-A1 142-82-5 Heptane, N-ug/m3
54 MP-BS1 67-63-0 Isopropanol ug/m3
790 MP-BS1 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0.74 MP-A1 108-88-3 Toluene ug/m3
0.86 MP-A1 76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-ug/m3
1.6 MP-A1/MP-DUP 75-69-4 Trichlorofluoromethane ug/m3
3.7 MP-BS1 108-38-3 Xylene, m-ug/m3
2.6 MP-BS1 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
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.If 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
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: July 2023
Basis: May 2023 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Western Portion of Site - Worst Case
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated Indoor Air
Concentration
(ug/m3)
Target Indoor Air Conc. for Carcinogens @ TCR = 1E-06
Target Indoor Air Conc. for Non-Carcinogens @ THQ = 0.2
Calculated
Carcinogenic
Risk
Calculated
Non-
Carcinogenic
Hazard
Quotient
67-64-1 Acetone 440 13.2 --
71-43-2 Benzene 0.59 0.0177 3.6E-01 6.3E+00 4.9E-08 5.7E-04
56-23-5 Carbon Tetrachloride 0.65 0.0195 4.7E-01 2.1E+01 4.2E-08 1.9E-0467-66-3 Chloroform 0.27 0.0081 1.2E-01 2.0E+01 6.6E-08 7.9E-0574-87-3 Chloromethane 1.1 0.033 -1.9E+01 3.5E-04110-82-7 Cyclohexane 1.8 0.054 -1.3E+03 8.6E-06
75-71-8 Dichlorodifluoromethane 4.6 0.138 -2.1E+01 1.3E-03
100-41-4 Ethylbenzene 0.97 0.0291 1.1E+00 2.1E+02 2.6E-08 2.8E-05
109-99-9 ~Tetrahydrofuran 16 0.48 -4.2E+02 2.3E-04
142-82-5 Heptane, N-0.54 0.0162 -8.3E+01 3.9E-05
67-63-0 Isopropanol 54 1.62 -4.2E+01 7.8E-0378-93-3 Methyl Ethyl Ketone (2-Butanone)790 23.7 -1.0E+03 4.5E-03108-88-3 Toluene 0.74 0.0222 -1.0E+03 4.3E-0676-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-0.86 0.0258 -1.0E+03 4.9E-06
75-69-4 Trichlorofluoromethane 1.6 0.048 --
108-38-3 Xylene, m-3.7 0.111 -2.1E+01 1.1E-03
95-47-6 Xylene, o-2.6 0.078 -2.1E+01 7.5E-04
Cumulative:1.8E-07 1.7E-02
All concentrations are in ug/m3
Output Form 3B
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.
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Non-Residential Worker Soil Gas to Indoor Air
Version Date: July 2023
Basis: May 2023 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Western Portion of Site - Worst Case
CAS #Chemical Name:
Soil Gas
Concentration
(ug/m3)
Calculated
Indoor Air Concentration
(ug/m3)
Target Indoor
Air Conc. for
Carcinogens @
TCR = 1E-06
Target Indoor Air
Conc. for Non-
Carcinogens @
THQ = 0.2
Calculated Carcinogenic Risk
Calculated Non-Carcinogenic Hazard
Quotient
67-64-1 Acetone 440 4.4 --
71-43-2 Benzene 0.59 0.0059 1.6E+00 2.6E+01 3.8E-09 4.5E-05
56-23-5 Carbon Tetrachloride 0.65 0.0065 2.0E+00 8.8E+01 3.2E-09 1.5E-05
67-66-3 Chloroform 0.27 0.0027 5.3E-01 8.6E+01 5.1E-09 6.3E-06
74-87-3 Chloromethane 1.1 0.011 -7.9E+01 2.8E-05
110-82-7 Cyclohexane 1.8 0.018 -5.3E+03 6.8E-0775-71-8 Dichlorodifluoromethane 4.6 0.046 -8.8E+01 1.1E-04100-41-4 Ethylbenzene 0.97 0.0097 4.9E+00 8.8E+02 2.0E-09 2.2E-06109-99-9 ~Tetrahydrofuran 16 0.16 -1.8E+03 1.8E-05
142-82-5 Heptane, N-0.54 0.0054 -3.5E+02 3.1E-06
67-63-0 Isopropanol 54 0.54 -1.8E+02 6.2E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)790 7.9 -4.4E+03 3.6E-04
108-88-3 Toluene 0.74 0.0074 -4.4E+03 3.4E-0776-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-0.86 0.0086 -4.4E+03 3.9E-0775-69-4 Trichlorofluoromethane 1.6 0.016 --108-38-3 Xylene, m-3.7 0.037 -8.8E+01 8.4E-05
95-47-6 Xylene, o-2.6 0.026 -8.8E+01 5.9E-05
Cumulative:1.4E-08 1.3E-03
All concentrations are in ug/m3
Output Form 3E
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.
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: July 2023
Basis: May 2023 EPA RSL Table
Site ID: 24062-20-060
Exposure Unit ID: Western Portion of Site - Worst Case
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.8E-07 1.7E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.4E-08 1.3E-03 NO
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
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.
Notes:
3. NM = Not modeled, user did not check this pathway as complete.
4. NC = Pathway not calculated, required contaminant migration parameters were not entered.
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
North Carolina DEQ Risk Calculator