24062 South & Hollis Vapor Intrusion Mitigation Plan 20211217

Via Email
December 17, 2021
NCDEQ – Division of Waste Management Brownfields Program 1646 Mail Service Center
Raleigh, NC 27699-1646
Attn: Mr. Bill Schmithorst Re: Vapor Intrusion Mitigation Plan – Revision 2
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 Plan – Revision 2 dated December 17, 2021 for 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 Matt Bramblett, PE Senior Project Engineer Principal
Enclosure:
cc: Mr. Dan Coith and Mr. Dan Outen, Akridge (Via Email) Ms. Mary Katherine Stukes, Moore & Van Allen (Via Email) Ms. Haley Martin, H&H (Via Email) Ms. Pamela Tyrrell, Kettler (Via Email)

Vapor Intrusion Mitigation Plan
Revision 2

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

Brownfields Project No. 24062-20-060

H&H Job No. AKR-007
December 17, 2021

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Vapor Intrusion Mitigation Plan, Rev. 2 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 Design Basis ................................................................................................................ 5
2.1 Base Course Layer and Vapor Barrier ..................................................................6
2.2 Horizontal Collection Piping, Vertical Riser Piping, and Turbine Fans ...............7
2.3 Monitoring Points ..................................................................................................8
2.4 General Installation Criteria ................................................................................10
3.0 Quality Assurance / Quality Control ..................................................................... 11
4.0 VIMS Effectiveness Testing .................................................................................... 13
4.1 Influence Testing .................................................................................................13
4.2 Pre-Occupancy Sub-Slab Vapor and Indoor Air Sampling .................................14
4.3 VIMS Effectiveness Results ................................................................................17
5.0 VIMS Effectiveness Monitoring ............................................................................. 18
6.0 Future Tenants & Building Uses ............................................................................ 19
7.0 Reporting .................................................................................................................. 20

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

Attachment A Vapor Intrusion Assessment Data Summary (Excerpts)
Attachment B Vapor Intrusion Mitigation Plan – Sheets VM-1, VM-2, VM-2A and VM-3
Attachment C-1 VaporBlock 20 (VBP-20) Product Specification Sheets & Installation
Instructions
Attachment C-2 Drago Wrap Product Specification Sheets & Installation Instructions
Attachment C-3 Empire Passive Ventilator Fan Product Specification Sheet
Attachment C-4 Big Foot Slotted PVC Pipe Product Specification Sheet
Attachment C-5 Zurn Industries Floor Clean-out Product Specification Sheet
Attachment C-6 Soil Gas Collector Mat Product Information and Installation Guide

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Vapor Intrusion Mitigation Plan, Rev. 2 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, Hart & Hickman, PC (H&H) has prepared this Vapor
Intrusion Mitigation Plan (VIMP) for the proposed redevelopment of the South and Hollis LoSo
Brownfields property (Brownfields No. 24062-20-060) located at South Boulevard and Hollis
Road in Charlotte, Mecklenburg County, North Carolina (Site). A Site location map is provided
as Figure 1, and the Site and surrounding area are shown in Figure 2.

The Site consists of seven contiguous parcels of land (Mecklenburg County Parcel Identification
Nos. 14905301, 14905302, 14905303, 14905305, 14905306, 14905314, and 14905315) totaling
approximately 2.6 acres. The northwestern Site parcel (3423 South Boulevard) is developed
with an approximate 3,984 square foot (sq ft) commercial building that is occupied by an auto
painting facility. The western Site parcel (3435 South Boulevard) is developed with an
approximate 3,492-sq ft warehouse building occupied by a lawn equipment rental and repair
company. The southwestern Site parcel (3441 South Boulevard) is developed with an
approximate 7,450-sq ft commercial building that is occupied by a sweepstakes store.
Remaining portions of the Site consist of vacant land and asphalt and gravel parking lots and
driveways.

The Site consisted of agricultural land and a rural residence in the early 1900s. By the 1940s, a
commercial building/gas station was developed in the southwestern corner of the Site. By the
mid-1950s, the northwestern and western Site buildings were constructed along South Boulevard
and an additional residence was constructed in the central portion of the Site. The northwestern
Site building (3423 South Boulevard) was utilized as a machining and metal working company
from at least the 1950s until the early 1960s, and it is currently occupied by an auto painting
facility. The western Site building (3435 South Boulevard) has been utilized as a lawn
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equipment repair facility since the early 1960s. The southwestern portion of the Site (3441
South Boulevard) was utilized as a gas station from the 1950s until the early 1960s and as a night
club or sweepstakes store from the late 1960s until recently. The eastern portion of the Site was
recently used as a contractor storage yard for utility work on South Boulevard.

Current redevelopment plans for the Site include razing the existing Site buildings and
constructing a six-story multi-family residential apartment building. Site grading and
redevelopment activities are currently underway as of the submittal of this VIMP. The ground
floor (Floor 1) of the proposed building will be on grade and will consist of apartment units,
retail units, open-air parking, leasing, office, amenity, mechanical, and building services areas.
The enclosed space of the ground floor is approximately 53,000 sq ft. Level 2 and subsequently
higher levels will consist of residences and mechanical rooms. The generalized building layout is
presented on Figure 3.

The Site received a letter of eligibility for entry into the DEQ Brownfields Program (Brownfields
Project No. 24062-20-060) on February 5, 2021. On March 1, 2021, a kick-off/data gap meeting
was held with the PD, the DEQ Brownfields Program project manager, and H&H to discuss Site
history, previous environmental assessment, proposed redevelopment plans, data gaps, and a
proposed schedule for completing the Brownfields Agreement.

Assessment activities including vapor intrusion and groundwater assessment were completed at
the Site in April 2021 and reported in the Brownfields Assessment Report, dated June 9, 2021. A
review of the soil gas sample results indicate the presence of petroleum-related compounds,
including 1,1,2,2-tetrachloroethane and benzene at concentrations above the DEQ Division of
Waste Management (DWM) Residential Vapor Intrusion Soil Gas Screening Levels (SGSLs) in
samples collected from soil gas point SG-2, and naphthalene at concentrations above the SGSL
in soil gas point SG-7. Risk calculator results using worst-case compound concentrations
detected in the soil gas samples under a residential use scenario indicate that the calculated
cumulative non-carcinogenic HI does not exceed 1 and the calculated lifetime incremental
carcinogenic risk (LICR) does not exceed 1 x 10-4. Results of the risk calculation under this
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hypothetical worst-case scenario indicated a LICR of 2.6 x 10-5 and HI of 0.83 under a
residential use scenario.

Although risk calculator results do not indicate unacceptable vapor intrusion risks at the Site, the
PD has elected to proactively install a vapor intrusion mitigation system (VIMS) below
occupiable ground-level areas of the proposed building (excluding the proposed parking garage
and courtyard) as a precautionary measure. The Brownfields Assessment Report documenting
vapor intrusion assessment conducted at the Site in April 2021 was submitted to DEQ on June 9,
2021. Analytical data summary tables, a sample location map, and associated risk calculations
are provided in Attachment A.

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.” In addition, this
VIMP was prepared to satisfy the vapor intrusion mitigation condition in the pending
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 NCEQ 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.

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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 is fully protective of public health from known Brownfields
Property contaminants.

[SEAL]

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2.0 Design Basis
The VIMS design drawings are included in Attachment B as Sheets VM-1, VM-2, VM-2A, and
VM-3 (dated September 3, 2021) and will be used to guide construction of the VIMS. To reduce
the potential for structural vapor intrusion, the VIMS will operate as a sub-slab venting system
that includes a network of horizontal sub-slab and vertical above slab riser piping connected to
wind-driven turbine fans installed above the building roof. The foundation of the building will
consist of two distinct column supported slab-on-grade areas on Level 1. Commercial Spaces
(Retail A and Retail B) will be located on the western portion of the building, while residential
units will be located on the eastern portions. The ground floor area of the western commercial
spaces, cumulatively, is approximately 10,500 square feet and the ground floor space of the
eastern residential area is approximately 42,500 square feet. An open-air parking garage, an
enclosed amenity area, an enclosed maintenance room, and a retaining wall are situated between
the commercial spaces and the Level 1 residential units. Vapor intrusion mitigation measures are
not warranted in the parking garage area because of the open-air space; however, mitigation
measures will be included for the enclosed spaces within the parking garage. Enclosed areas
within the parking garage that have public access or connect to upper living floors with doors,
openings, or conduits will include a vapor barrier and sub-slab venting. Other enclosed areas in
the parking garage that do not have public access, and do not connect to upper floors with doors,
openings, or conduits (such as the Retail B electrical room and garage sprinkler room) will
contain a vapor barrier.

The western commercial spaces, Retail A and Retail B, are “pour-back” areas that will be left
without concrete and remain unfinished to allow for future tenant upfit including installation of
sub-slab utilities. Further details regarding the measures to be implemented for the pour-back
areas are included in this VIMP.

The previous assessment sampling results and risk calculations indicate that a VIMS is not
warranted for this building and the VIMS detailed herein is being installed as proactive measure
(see Section 1.0). As such, trench dams that are sometimes installed along utility trenches to
prevent air movement from Site areas with elevated concentrations to areas with structures are
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not warranted due to the lack of elevated contaminant concentrations on the Site. Furthermore,
the proposed VIMS is designed to prevent vapor intrusion from sub-surface features into the
building including vapors that could potentially travel along utility trenches.

2.1 Base Course Layer and Vapor Barrier

The VIMS includes placement of a minimum 5-inch base course gravel layer consisting of high
permeability stone (clean #57 stone, or similar high permeability stone approved by the Engineer
certifying the VIMP) below the concrete slab of the building. A vapor liner (vapor barrier) will
be installed above the base course gravel layer (and directly beneath the slab). Please note that
the horizontal collection piping network will be installed within the base course gravel layer
prior to placement of the vapor liner. The horizontal vapor collection piping is discussed further
in Section 2.2. below. The piping layout is shown on Sheet VM-1, and section details are shown
on Sheets VM-2, VM-2A, and VM-3 (Attachment B).

The vapor liner will consist of Vaporblock® Plus 20 (VBP20) manufactured by Raven Industries
(Raven). As an alternative, Drago® Wrap Vapor Intrusion Barrier (Drago Wrap) manufactured
by Stego® Industries (Stego) can be used. Technical specifications for each vapor liner product
are included in Attachment C. Vapor liners will be installed per manufacturer installation
instructions (Attachment C). The liners will be installed over the sub-slab washed gravel to
cover the areas shown on Sheet VM-1. Each vapor liner manufacturer recommends select
sealing agents (mastics, tapes, etc.) for their product. Therefore, and in accordance with the
manufacturer installation instructions, the use of alternative vapor liner products not approved by
the manufacturers for sealing will not be used. One vapor liner product and associated
accessories should be used continuously throughout the installed system.

The exterior edges of the vapor liner will be attached and sealed to building footings and
subsurface concrete features utilizing the tape specified in the manufacturer instructions. Seams
within the building footprint will have a minimum of 6-inches or 12-inches of overlap
(depending on the vapor barrier manufacturing specifications) and will be sealed with the tape
specified in the manufacturer instructions. If the vapor liner is damaged, torn, or punctured
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during installation, a patch will be installed by overlaying a piece of vapor liner that is cut to the
approximate shape of the damaged area, and sized such that a minimum of 6-inches of patch
surrounds the damaged area. The seams of the patch will then be sealed using the manufacturer
recommended tape.

In areas where utility penetrations (i.e., piping, ducts, etc.) are present and the use of the tape
recommended by the manufacturer is not practical or deemed as “ineffective” by the Engineer
certifying the VIMP, an alternative sealant product specified by the vapor liner manufacturer can
be used. Following successful installation of the vapor liner, the finished concrete slab will be
placed directly on top of the sealed vapor liner to further seal the seams and penetrations. For
the pour-back areas, Retail A and Retail B, the vapor barrier will be placed and properly sealed
across areas following installation of sub-slab horizontal collection piping. The vapor barrier
will remain without concrete cover until tenants purchase and prepare the slab in the commercial
spaces.

2.2 Horizontal Collection Piping, Vertical Riser Piping, and Turbine Fans
Passive sub-slab venting will be accomplished using wind-driven turbine fans (a passive
measure) and horizontal perforated collection piping which will collect vapor from beneath the
ground floor slabs and discharge the vapors above the building roofline through vertical riser
piping. Sub-slab piping will consist of 3-inch diameter Schedule 40 (SCH 40) PVC piping and
fittings, unless otherwise specified in the VIMP. Above-slab piping will consist of 4-inch
diameter SCH 40 PVC piping and fittings. The piping layouts are shown on Sheet VM-1 and
section details are shown on Sheets VM-2, and VM-2A (Attachment B). Note that solid sections
of VIMS piping shall maintain a minimum 1% slope toward slotted sections to drain potential
condensation water. Product specifications for the slotted horizontal collection piping are
provided in Attachment C.

As an alternative to 3-inch diameter SCH 40 PVC horizontal piping, soil gas collector mat
manufactured by Radon Professional Discount Supply (Radon PDS) may be used for sub-slab
vapor collection piping. The Radon PDS soil gas collector mat is a polystyrene, plastic,
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rectangular conduit with a geotextile fabric covering. The mat is 1-inch thick and 12-inches
wide, and is specifically designed for collecting soil gas from below a building. If used, the soil
gas collector mat will be connected to the proposed 4-inch diameter vertical risers using Radon
PDS-manufactured riser connection fittings. Product specifications for the soil gas collector mat
are provided in Attachment C.

The VIMP includes installation of Empire Model TV04SS (stainless steel) wind-driven turbine
fans (or Engineer approved alternative) on the discharge end of the vertical riser piping above the
building roofline to enhance the passive system. The fans have a rated exhaust capacity of 126
to 147 cubic feet per minute in a four mile per hour wind. Wind will commonly drive the turbine
fans at wind speeds greater than 4 miles/hr. Discharge locations must be a minimum of 2 ft
above the roofline and 10 ft from an operable opening (such as door or window) or air intake into
the building. Note that fan locations on the roof depicted in the VIMS design may be
repositioned within the requirements specified above and pending approval by the Engineer
certifying the VIMP. Product specifications for the proposed turbine fans and PVC piping are
provided in Attachment C. An electrical junction box or outlet (120 V required) will be installed
on the roof near turbine fan location should connection of an electrical fan be warranted in the
future.

2.3 Monitoring Points
Seventeen monitoring points constructed with 2-inch diameter SCH 40 PVC pipe will be
installed as part of the VIMS to conduct effectiveness testing (see Section 4.0), including
vacuum influence measurements, and for the collection of sub-slab vapor samples for laboratory
analysis. In addition, three temporary monitoring points constructed with 1-inch diameter SCH
40 PVC pipe will also be installed and used to measure sub-slab vacuum influence
measurements. The monitoring point locations are shown on Sheet VM-1, and section details
and specifications are included on Sheets VM-2A, and VM-3 (Attachment A).

In general, monitoring points are placed at remotely distant locations from vertical riser piping
locations or in areas below living spaces. To prevent entering the residential units during future
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monitoring events, the monitoring point access ports will be located in hallways, mechanical
rooms, or in amenity spaces and secured within either a lockable weather-proof enclosure or
flush-mount sewer cleanout-type cover. Several monitoring points will be connected to extended
sub-slab horizontal pipes which place the intakes of the monitoring points below occupied
spaces. The access for collecting measurements for such point will be in the corridor of the
residential units. The three proposed temporary monitoring points are located within tenant units
to provide more vacuum influence coverage across the slab. These temporary monitoring points
will be abandoned after influence testing and prior to building finishing activities per permission
of the design engineer and DEQ. Abandonment procedures will include removal of the pipe,
insertion of a vapor barrier seal such as with Raven Pour-N-Seal™ or another design engineer
approved sealant, and completed with a concrete seal to match the existing slab. Product
specifications for the proposed floor cleanout covers are provided in Attachment C. In order to
reduce VOCs from construction materials in future sub-slab vapor samples submitted for
laboratory analysis, the monitoring point components will be connected using threaded
connections or approved low VOC containing products (Section 2.4).

In the event that a monitoring point cannot be installed due to building component conflict or is
damaged/destroyed during construction, a replacement monitoring point can be constructed,
pending approval by the Engineer certifying the VIMP. The replacement point(s) shall consist of
one of the specified designs on Sheets VM-2A and VM-3. DEQ will be notified in advance if
monitoring points are relocated significantly in relation to approved locations specified in the
VIMP (i.e., if moved to a location in a different mitigation area, section of slab, or tenant area).
The specific type of monitoring point installed will be documented in as-built drawings.

The proposed monitoring points within the Retail A and B tenant spaces (pour back areas) will
remain following completion of upfit activities. However, the locations of some permanent
monitoring points may need to be modified to accommodate tenant needs. If modifications to
the permanent monitoring point locations are necessary, a request for the modification will be
submitted for DEQ approval.

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2.4 General Installation Criteria

The VIMS piping and monitoring points shall be protected by the installation contractor and sub-
contractors throughout the project. Protective measures (e.g., flagging, protective boards, etc.)
shall be used as needed to prevent damage to the monitoring points. The monitoring points and
riser duct piping must be capped with a removable slip-cap or plug immediately following
installation to prevent water and/or debris from entering the VIMS.

In the commercial pour-back areas, the spaces shall not be accessible by residents and will
remain secured until tenant(s) are undergoing upfit activities. If foot-traffic is expected in
commercial tenant spaces prior to upfit activities, controls such as wooden boards and/or decking
will be placed in areas of foot-traffic. Temporary wooden boards and/or decking will also be
installed during tenant upfit activities to minimize damages to the vapor barrier from
construction workers. In addition, signage that indicates precautions should be taken while
working in the areas with exposed barriers will be posted in prominent locations in the areas of
tenant spaces.

Future tenant upfit and completion of ground-level components of Retail A and B will likely
include installation of sub-slab utilities within the gravel base. Utility installations will likely
include removal of certain sections of the vapor barrier as needed to place new sub-slab utility
conduits and slab penetrations, but such work is not expected to include notable trenching or
other major disturbance to Site soil. In addition, tenant utility installations are not expected to
interfere or disturb the VIMS horizontal or vertical piping network.

For each phase of construction (above and below slab), construction contractors and sub-
contractors shall use “low or no VOC” products and materials that could potentially contain
compounds of concern. Prior to submittal of a VIMS Installation Completion Report, the
construction contractor and sub-contractors shall be directed to provide safety data sheets (SDSs)
for products and materials used during construction. SDSs provided by the contractor and sub-
contractors, including but are not limited to building products, will be included in the VIMS
Installation Completion Report.
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3.0 Quality Assurance / Quality Control
For quality assurance and quality control (QA/QC) purposes, inspections will be conducted
during each phase of the VIMS installation. H&H will ask the contractor not to cover
components of the VIMS without an inspection. The components that require inspection are
outlined below:

(1) Inspection of the base course gravel layer, sub-slab piping layout, and monitoring points
prior to installing the vapor liner;
(2) Inspection of the vapor liner prior to pouring concrete;
(3) Inspection of above-grade vertical riser piping; and
(4) Inspection of turbine fan installations and riser pipe connections.

During inspections, H&H will note areas with multiple penetrations where Raven Pour-n-Seal®
(or equivalent) product is used. Representative photographs of these areas will be photographed
and included in system installation photo logs. In addition, during inspections, H&H will
observe and note potential hollow piping used by contractors to support utilities in preparation
for concrete slab pours. If such piping may cause a potential for vapor migration post-
construction, H&H will ask the contractors to remove them.

In addition to inspection of the vapor barrier, smoke testing of select areas of the vapor barrier
may be conducted per direction of the design engineer prior to the installation of concrete to
verify that the vapor barrier has been adequately sealed. Breaches in the vapor barrier identified
by visible smoke will be repaired during smoke testing activities.

Additional inspections will be conducted if the system(s) are activated to verify that the electric
fans (if installed) are functioning properly. Each inspection and smoke testing (if required) will
be performed by, or under direction of, the design engineer certifying the VIMP. Inspections
will be combined, when possible, depending on construction sequencing and schedule. The
inspections will include field logs and photographs for each section of slab. As requested, and
whenever possible, the Engineer certifying the VIMP, or his/her designee, will provide DEQ
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with 48-hour notice prior to conducting the inspections. Please note that 48-hrs notice to DEQ
may not be possible in some cases due to tight construction sequencing. In the event that 48-
hour notice is not possible, DEQ will be provided with as much notice as possible prior to an
inspection.

Additional Pour-Back Area Measures
The current property manager will be instructed to report activities in the pour-back areas (Retail
A and Retail B) that impact or may impact the vapor barrier to the design engineer. If the vapor
liner of Retail A or B is damaged at any time before the pouring of concrete floor slab, the vapor
liner must be repaired in accordance with installation guidelines provided in Attachment C and
inspected by the design engineer. If repairs are made, a description of the repairs will be
reported to DEQ within 30 days of completion.

The PD will also be instructed to contact the design engineer to perform the inspections
described above to confirm the VIMS is not impacted or modified during the tenant upfit
activities. If notable changes to the VIMS piping are needed for tenant upfit, then the changes or
modifications will be reviewed by the design engineer and submitted to DEQ for approval prior
to implementation. The concrete slab will not be poured in a tenant space until VIMS
components have been repaired and restored to the satisfaction of the design engineer and in
accordance with the DEQ-approved VIMP and approved addendums (if warranted). Specific
VIMS inspections will include the activities mentioned above.

In addition, after tenant upfit activities are complete, H&H will perform additional effectiveness
testing including an influence test (see Section 4.0) to confirm adequate sub-slab communication
and adequate depressurization remain achievable within these areas.

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4.0 VIMS Effectiveness Testing
4.1 Influence Testing

Post-installation (pre-occupancy) influence testing will be conducted on each VIMS treatment
area to evaluate vacuum communication across the slab and document sufficient depressurization
can be obtained should electric fans be needed in the future. Influence testing will be conducted
following installation of the horizontal collection piping, placement of the vapor liner, and
concrete slab pours. To facilitate testing, the vacuum influence testing should be completed with
the vertical riser piping stubbed above the slab, but prior to being constructed to the roof.

For system influence testing, one or more vapor extraction fans will be attached directly to
vertical riser piping for the section of the slab being evaluated. Pressure differential will be
measured at extraction fan locations, and each monitoring point will be checked for vacuum. A
pressure differential resulting in depressurization below the slab of at least 4 pascals
(approximately 0.016 inches of water column) at remote distances from riser location in each
VIMS treatment area is considered sufficient. Vacuum influence testing results will be
submitted to DEQ as part of the VIMS Installation Completion Report. If the influence testing
results indicate that modifications to the VIMS are needed to achieve sufficient sub-slab
depressurization, H&H will notify DEQ of the modifications prior to submittal of the VIMS
Installation Completion Report.

The pour-back areas in the floor 1 retail spaces will also be included in the pre-occupancy
influence testing. Influence testing will be conducted following the installation of vapor liner
prior to the pouring of concrete slab. Furthermore, following tenant upfit activities (Section 3.0),
additional influence testing of the completed pour-back areas will be conducted. The initial
influence testing results in the pour-back areas will be reported to DEQ in the VIMS Installation
Completion report, and subsequent testing results will be reported to DEQ in tenant upfit
completion addendum reports.

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4.2 Pre-Occupancy Sub-Slab Vapor and Indoor Air Sampling

The building shall not be occupied without prior written approval of DEQ based on sampling and
associated evaluations described in this Section and Section 4.3 below. After VIMS installation,
but prior to occupancy of the building, sub-slab vapor samples will be collected from select
monitoring points to further evaluate the potential for structural vapor intrusion. The sub-slab
vapor samples will be collected from locations generally separated by slab footings and at the
furthest reaches of the VIMS. Vapor intrusion assessment analytical results of samples collected
in the footprint of the Floor 1 VIMS of the proposed building will be used to separately evaluate
risk to future occupants of the building. Three (3) sub-slab vapor samples are proposed within
the proposed retail spaces, and eight (8) samples are proposed within the residential area of the
VIMS for a total of eleven (11) sub-slab vapor samples (Figure 3). Commercial retail spaces’
sub-slab vapor samples will be collected from monitoring points MP-A1, MP-BN1, and MP-
BS1. Floor 1 residential area VIMS sub-slab vapor samples will be collected from monitoring
points MP-2, MP-5, MP-6, MP-7, MP-8, MP-10, MP-11, and MP-13. One duplicate sub-slab
vapor sample using a laboratory-supplied “T” fitting for laboratory QA/QC purposes will be
collected during each sampling event.

Prior to sample collection, leak tests will be performed at each sample location. A shroud will be
constructed around the monitoring point and sub-slab vapor sampling train and canister. The air
within the shroud will be flooded with helium gas, and the concentrations will be measured and
maintained using a calibrated helium gas detector. With helium concentrations within the shroud
maintained, sub-slab vapor will be purged from the sampling point with an air pump and
collected into a Tedlar bag. The calibrated helium gas detector will be used to measure helium
concentrations within the Tedlar bag sample to confirm concentrations are less than 10% of the
concentration maintained within the shroud. A minimum of three sample train volumes will be
purged from each point prior to and during the leak testing activities.

The sub-slab vapor samples will be collected over an approximate 10-minute period using
laboratory supplied 1-liter or 1.4-liter Summa canisters and laboratory supplied flow regulators
calibrated with an approximate flow rate of 100 milliliters per minute. The vacuum in the
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Summa canisters will be measured at the start and end of the sampling event, and will be
recorded by sampling personnel. The vacuum in each canister at the conclusion of the sampling
event shall remain above 0 inches of mercury (inHg), with a target vacuum of approximately 5
inHg. H&H understands that, analytical results for a sample will not be accepted by DEQ if
internal vacuum for that sample reaches 0 inHg. The samples will be submitted to a qualified
laboratory under standard chain of custody protocols for full-list volatile organic compounds
(VOCs) by EPA Method TO-15 (includes naphthalene). The analytical laboratory will be
instructed to report vacuum measurements as received and J-flag concentrations for each sample.
In addition, H&H will request that the laboratory report compound concentrations to the lower of
the laboratory method detection limits or the DEQ DWM Residential SGSLs to the extent
possible.

As required by DEQ due to trace detections of trichloroethene (TCE) in soil gas and groundwater
in the eastern portion of the site and as a precautionary measure, indoor air samples will be
collected in accordance with the DWM VI Guidance. During the indoor air sampling, doors to
the building exterior will be closed. With the exception of the sample location in the cycle
center, the locations of the indoor air samples will be adjacent to sub-slab samples to be collected
in the eastern building which will be an apartment building. Therefore, a total of seven indoor
air samples will be collected during pre-occupancy testing.

No indoor air samples will be collected in the western building area with retail (or the parking
garage) on floor 1 because no TCE was detected in this area of the site during the Brownfields
Assessment activities. However, indoor air sampling will be conducted in the western retail
building area if necessary based on the results of sub-slab vapor sample data and associated risk
calculations.

The indoor air samples in the eastern building area will be collected using individually-certified
6-liter stainless steel Summa canisters connected to in-line flow controllers equipped with a
vacuum gauge. The flow controllers will be set by the laboratory to allow the samples to be
collected over an approximately 24-hour period for the residential use scenario in the eastern
portion of the Site. A 3-foot long sampling cane, or similar methods, will be connected to the
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flow controller so that the sample intake point is positioned approximately 5 ft above grade
(typical breathing zone height) when the sample canister is set on its base. In addition, during
the indoor air sampling event, one duplicate sample for laboratory QA/QC and one background
sample from an ambient air upwind locations will be collected. Prior to and after the indoor and
background air samples are collected, vacuum in the canisters will be measured using a
laboratory-supplied vacuum gauge and recorded by sampling personnel. A vacuum above 0
inHg and ideally around 5 inHg will be maintained within the canisters at the conclusion of the
sampling event.

The starting and ending vacuum in each canister will be recorded on the sample chain-of-
custody. Periodic checks will be conducted by sampling personnel to monitor the pressure
within the Summa canisters during sampling to ensure adequate sample volume is collected. The
sample canisters will then be labeled and shipped under standard chain-of custody procedures to
a qualified laboratory for analysis of select VOCs by EPA Method TO-15. The select list of
VOCs for the indoor air samples will include tetrachloroethene (PCE), TCE, TCE degradation
products, and VOCs detected in soil, groundwater, or soil gas in any historical or current
sampling events. The analytical laboratory will be instructed to report vacuum measurements at
receipt and J-flag concentrations for each sample. H&H will request that the laboratory report
compound concentrations to the lower of the laboratory method detection limits or the DEQ
DWM Residential Vapor Intrusion Indoor Air Screening Levels (IASLs) to the extent possible.
In addition, an Indoor Air Building Survey form (Appendix C of the DWM VI Guidance) will be
completed.

New construction materials such as paint, caulk, carpet, mastics, etc., which could be sources of
VOCs in indoor air, may cause interference with Site-specific compounds of concern during
indoor air sampling. As previously noted, the construction contractors will be requested to
provide SDSs for materials used during construction which will be submitted to DEQ, if needed
to further evaluate sub-slab and indoor air data.

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4.3 VIMS Effectiveness Results

The results and analysis of the sub-slab vapor and indoor air sampling will be submitted to DEQ
with the final VIMS Installation Completion Report (discussed in Section 7.0). After receipt of
the sample analytical results, H&H will use the most recent version of the DEQ Risk Calculator
to evaluate cumulative vapor intrusion risks under a residential scenario for each sample
location. Because the western building areas are proposed for retail use, samples collected in
Retail A and B will be compared to commercial screening levels. H&H will consider the VIMS
effective if the calculated cumulative risks are less than 1x10-4 for potential carcinogenic risks
and below a Hazard Index of 1.0 for potential non-carcinogenic risks, in accordance with DEQ’s
risk calculator thresholds. H&H acknowledges that DEQ may still request additional sampling if
Site contaminants of concern are elevated, even if the risk calculations are acceptable. In the
event that calculated cumulative risks are greater than 1x10-4 for potential carcinogenic risks
and/or above a Hazard Index of 1.0 for potential non-carcinogenic risks as a result of structural
vapor intrusion, confirmation sub-slab vapor or indoor air (see below) samples will be collected
from the area of concern. In the event that an additional round of samples indicates acceptable
risk levels are met, no further pre-occupancy sampling will be conducted with DEQ’s written
concurrence. In the event that calculated cumulative risks for a residential scenario continue to
exceed acceptable levels for potential carcinogenic risks (greater than 1x10-4) and/or potential
non-carcinogenic risks (above a Hazard Index of 1.0) as a result of structural vapor intrusion,
considerations will be made to convert the system from a passive system to an active system.

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5.0 VIMS Effectiveness Monitoring
The VIMS is proposed as a passive system which will include vapor extraction through sub-slab
collection piping and enhanced with wind-driven turbine fans located above the building
roofline. As such, differential pressure monitoring is not anticipated. If the VIMS is converted to
an active system with electric fans based on post-construction VIMS efficacy testing results,
mitigation system modifications and plans for additional VIMS efficacy testing will be submitted
to the DEQ Brownfields Program for approval prior to implementation. Actual fans to be used
will be selected based on the results of the influence testing discussed in Section 4.0.

Post-construction VIMS effectiveness monitoring will include annual sub-slab vapor and indoor
air sampling at the locations indicated in Section 4.0. The sampling will be conducted using the
procedures described in this VIMP. If post-construction 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.
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6.0 Future Tenants & Building Uses
The future use of the proposed Site building includes one residential apartment building with
retail areas located on the ground or first floor in the western portion of the building. After
occupancy of the Site building, the building maintenance department will maintain or contract
for maintenance of the vapor mitigation system. If vapor mitigation components are damaged or
need to be altered for building renovations, the building management will be instructed to
contact the maintenance department. The maintenance department shall contact a North
Carolina licensed Professional Engineer to oversee or inspect the activities, and a report shall be
submitted to DEQ detailing the repairs or alterations. To aid in identification of the vapor
mitigation piping, the piping will be labeled with “Vapor Mitigation – Contact maintenance”, or
similar language, on all accessible piping at intervals no greater than 10-linear feet.

Future VIMS maintenance and upkeep will be the responsibility of the property management
group or building owner. As part of the standard annual Land Use Restriction Update submittal
that is will be required as part of the pending Notice of Brownfields Property agreement, H&H
recommends the building owner or management complete a visual inspection of the exposed
parts of the system including, but not limited to, the vertical risers and ventilators on the roof and
the monitoring points. H&H recommends annual inspections be documented and kept on record
to be provided to DEQ upon request.
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7.0 Reporting
A VIMS Installation Completion Report (sealed by a NC PE) documenting installation activities
associated with the VIMS will be submitted to DEQ following confirmation that the mitigation
system is installed and effectively mitigating potential vapor intrusion risks to building
occupants. In addition, for the pour-back areas, addendum reports documenting subsequent
inspections and influence testing after tenant upfit activities are complete will be submitted under
separate cover to DEQ. The report(s) will include a summary of VIMS installation activities
such as representative photographs and as-built drawings, QA/QC measures, SDSs of materials
used in construction, VIMS effectiveness testing results, and inspection documents. The report
will also include an engineer’s statement as to whether the VIMS was installed in accordance
with the DEQ approved VIMP and is fully protective of public health as defined in Section 1.0,
and as evidenced by the VIMS inspections performed by the engineer or engineer’s designee,
results of the influence testing, results of the analytical testing, and QA/QC measures as
described in this VIMP. Deviations from the approved design will be provided in the report.

The pending Notice of Brownfields Property agreement for the Site is anticipated to include land
use restrictions that indicate the building(s) shall not be occupied until DEQ provides written
compliance approval for the installation and performance of the VIMS as documented in the
installation report. However, we understand that DEQ may provide conditional compliance
approval with submittal of a data summary package in lieu of the full VIMS Installation
Completion Report based on timing of the proposed building occupancy date and report review
times. No occupancy of the building can occur without prior written approval of DEQ, with the
decision based on the pre-occupancy sub-slab vapor and indoor air sampling results.

After each additional annual post-construction sub-slab vapor and indoor air sampling event, a
report will be submitted to DEQ to document the sampling activities and results.

USGS The National Map: National Boundaries Dataset, 3DEP ElevationProgram, Geographic Names Information System, National HydrographyDataset, 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 NOAANational Centers for Environmental Information, U.S. Coastal ReliefModel. Data refreshed May, 2020.
SITE LOCATION MAP
SOUTH AND HOLLIS LOSOSOUTH BOULEVARD AND HOLLIS ROADCHARLOTTE, NORTH CAROLINA
DATE: 3-8-21
JOB NO: AKR-006
REVISION NO: 0
FIGURE. 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
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)
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WESTON STREETSOUTH BOULEVARDSOUTH BOULEVARDH
A
R
T
F
O
R
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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
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A4.0-M1
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A5.0-M1
A5.0-M1
B2.0-M1
A4.0-M1
A4.0-M1
B2.0-M1
A1.0-M1
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B2.0-M1
A3.0-M1
A3.0-M1
A3.0-M1
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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
LEASING
MECH
WORK ROOM
A/V
LIBRARY /
RIDESHARE
LOUNGE
"THE CUBE"
MECH.MECH.
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MECH.MECH.
CLUB
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MECH.A/V
HC
STOR.
HC
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
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RETAIL
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FITNESS
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MAX
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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
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
REVISION 2SOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060FIGURE NO. 3
REVISIONS
REV DATE DESCRIPTION
0 09/03/21 DEQ SUBMISSION
1 11/08/21 DEQ SUBMISSION - REV 1
2 12/17/21 DEQ SUBMISSION - REV 2
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
PROPOSED TOP OF SLAB ELEVATION (TOS). REFER TO STRUCTURAL
CONSTRUCTION DRAWINGS FOR FINAL ELEVATIONS.
MONITORING POINT
PROPOSED INDOOR AIR SAMPLE LOCATION
TEMPORARY POINT LOCATION
PROPOSED SUB-SLAB SAMPLE LOCATION
739.50 TOS
MP-5
IAS-5
IAS-5
IAS-6
IAS-7
IAS-4
IAS-3
IAS-1
IAS-2
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
SUB-SLAB SAMPLE
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Attachment A

Vapor Intrusion Assessment Data Summary (Excerpts)
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
SG-8
SB-8
SB-4
SB-10
SG-7
SG-9
SG-10
SG-5
SG-6
SG-4
SG-3
SG-1
SB-7
SB-5
SG-2
SB-2
COMP-1
TMW-3/SB-3
TMW-4/SB-9
TMW-2/SB-6
TMW-6/SB-12
TMW-5/SB-11
TMW-1/SB-1
REVISION NO. 0
JOB NO. AKR-006
DATE: 5-18-21
FIGURE NO. 3
SOUTH AND HOLLIS LOSO
SOUTH BOULEVARD AND HOLLIS ROAD
CHARLOTTE, NORTH CAROLINA
SAMPLE LOCATION MAP
LEGEND
BROWNFIELDS PROPERTY
BOUNDARY
PARCEL BOUNDARY LINE
STORM DRAIN
APPROXIMATE LOCATION OF A
HEATING OIL UST
APPROXIMATE EXTENT OF HEAVY
OIL STAINING
PROPOSED RESIDENTIAL
APARTMENTS
PROPOSED RETAIL OR AMENITY
SPACE
PROPOSED PARKING DECK
SOIL BORING
ALIQUOT FOR COMPOSITE SOIL
SAMPLE
SOIL GAS SAMPLE
CO-LOCATED TEMPORARY
MONITORING WELL AND SOIL
BORING
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
NOTES:
1.PARCEL DATA OBTAINED FROM MECKLENBURG
COUNTY GIS, 2021.
2.AERIAL IMAGERY OBTAINED FROM MECKLENBURG
COUNTY GIS, 2020.
3.PROPOSED REDEVELOPMENT PLAN PROVIDED BY
LANDDESIGN DATED FEBRUARY 2021.
4.UST = UNDERGROUND STORAGE TANK
PROPOSED
COURTYARD/POOL WESTON STREETH
O
L
L
I
S

R
O
A
DSOUTH BOULEVARDH
A
R
T
F
O
R
D

A
V
E
N
U
E
LAWN EQUIPMENT
REPAIR SHOP
UNLABELED 55-GALLON
DRUM STORAGE
APPROXIMATE
EXTENT OF SOIL
STOCKPILE
FORMER GAS STATION
(1963 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.3, 5/18/2021 2:35:28 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

Attachment B

Vapor Intrusion Mitigation Plan
Sheets VM-1, VM-2, VM-2A and VM-3
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-13F-A1
F-A2
F-BN1
F-BS1
F-1
F-3
F-4
F-6
F-7
F-8
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
REVISION 2SOUTH AND HOLLIS LOSO3424, 3435, AND 3441 SOUTH BOULEVARD & 111 HOLLIS ROADCHARLOTTE, NORTH CAROLINABROWNFIELDS PROJECT NO. 24062-20-060VM-1
PROFESSIONAL
APPROVAL
REVISIONS
REV DATE DESCRIPTION
0 09/03/21 DEQ SUBMISSION
1 11/08/21 DEQ SUBMISSION - REV 1
2 12/17/21 DEQ SUBMISSION - REV 2
LEGEND
SLAB GRADE CHANGE
THICKENED SLAB
COLUMN AND FOOTING
OUTDOOR OR OPEN AIR SPACE
PROPOSED TOP OF SLAB ELEVATION (TOS). REFER TO STRUCTURAL
CONSTRUCTION DRAWINGS FOR FINAL ELEVATIONS.
EXTENT OF VAPOR LINER
HORIZONTAL COLLECTION PIPING OR SOIL GAS COLLECTOR MAT
3" DIA SCH 40 SOLID PVC PIPE
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
(POSITION INTAKE MINIMUM 5-FT FROM EXTERIOR FOOTING)
TEMPORARY MONITORING POINT
(POSITION INTAKE MINIMUM 5-FT FROM EXTERIOR FOOTING)
MP-4
DEVELOPER:
KA LOSO INVESTMENTS
LLC
307 W. TREMONT AVENUE
SUITE 200
CHARLOTTE, NORTH CAROLINA
F-7
4E/24
12
VM-2A
4E/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
4E/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
45-DEGREE ELBOW, TYP
45-DEGREE ELBOW, TYP
90-DEGREE
ELBOW, TYP
PVC TEE
FITTING, TYP
12
VM-2A
17
VM-2A
19
VM-2A
PVC WYE, TYP
45-DEGREE ELBOW, TYP
739.50 TOS
19
VM-2A
5
VM-2
4D/24
11
VM-2
INSTALL THICKENED SLAB FOR GRAVEL
CUT-OFF BETWEEN FINISHED AND
POUR-BACK AREAS (SEE DETAIL 8/VM-2)
5
VM-2
4F/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
12/17/21
AREA DOES NOT
CONNECT TO UPPER
OCCUPIALBE SPACES
21
VM-2A
21
VM-2A
23
VM-2A
23
VM-2A
VM-2A
23
S:\AAA-Master Projects\Akridge\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMP Design_AKR007_REV 12-17-21.dwg, 12/18/2021 9:27:42 AM, DWG To PDF.pc3
VAPOR BARRIER AND BASE COURSE (TYPICAL)1
BASE COURSE - CLEAN #57 STONE
MIN 5" THICK BENEATH VAPOR BARRIER (SEE
SPECIFICATION #1)
VAPOR BARRIER (SEE SPECIFICATION #2)
CONCRETE FLOOR SLAB
SUBBASE
NTSVM-2
SLOTTED COLLECTION PIPE (TYPICAL)2
3" SCH 40 THREADED FLUSH JOINT
SLOTTED PVC PIPE SET WITHIN MIN 5"
BASE COURSE (SEE SPECIFICATION #3)
VAPOR BARRIER (SEE SPECIFICATION #2)
SUBBASE
NTS
CONCRETE FLOOR SLAB
VM-2
PVC ENDCAP - DRILL
APPROX. 3 - 1/4" HOLES
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 SLOTTED 3" SCH 40
PVC PIPE TRANSITION (SLIP
COUPLING OR THREADED JOINT)
4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #4, #5 & #6)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
SLOTTED 3" SCH 40 PVC
VAPOR LINER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS VAPOR LINER
4" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #4, #5 & #6)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 #2)
VAPOR LINER
SOLID TO SLOTTED 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 SHALL BE DISCONTINUOUS WITH
MINIMUM 1-FT OF SOIL IN HORIZONTAL
DIRECTION BETWEEN GRAVEL LAYERS
(SEE SPECIFICATION #8)
WALL (VARIES)
OPEN AIR
PARKING GARAGEOCCUPIED SPACE
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURERS INSTRUCTIONS (TYP)
MINIMUM 5" THICKENED SLAB THICKNESS
TERMINATE VAPOR LINER 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 SLOTTED 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 SPECIFICATION #5)
PIPE SLEEVE
(SEE SPECIFICATION #12)
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
TERMINATE VAPOR
LINER 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 VERTICAL RISER (OPTIONAL SUB-SLAB COLLECTION PIPE)
NTS
4C
VM-2
BRICK OR HOUSE SIDING
EXTERNAL WALL (NOT PRESENT
AT ALL LOCATIONS)
STUD WALL
VAPOR LINER SEALED TO PIPE
AND CONCRETE PER
MANUFACTURER INSTRUCTIONS.
3" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #4, #5 & #6)
4" TO 3" PVC REDUCER
4" SCH 40 PVC RISER DUCT PIPE
BASE COURSE
SOIL GAS
COLLECTOR MAT
SUBBASE
SOIL GAS COLLECTOR MAT CONNECTION SEALED TO 4" SCH 40
PVC RISER WITH POLYURETHANE SEALANT
SOIL GAS COLLECTOR MAT CONNECTION BLOCK TO PVC (ONE 0.5"
DIAMETER HOLE DRILLED IN BOTTOM FOR MOISTURE DRAINAGE)
EXTEND VAPOR BARRIER UP
SIDE OF EXTERIOR WALL IF
FINISHED GRADE IS HIGHER
THAN TOP OF SLAB
VIMS AT RETAINING WALL WITH RISER PIPE (TYP)
NTS
4E
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 17/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
SOLID TO SLOTTED 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 SPECIFICATION #4, #5 & #6)
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 SLOTTED 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 SPECIFICATION #4, #5, & #6)
3" SCH 40 PVC
90-DEGREE TEE
PIPE SLEEVE
(SEE SPECIFICATION #12)
VIMS AT RETAINING WALL ADJACENT TO OPEN AIR SPACE (TYP)
NTS
4D
VM-2
INTERIOR SPACE
OPEN AIR SPACE
SUB-BASE
BASE COURSE
VAPOR LINER
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
SOLID TO SLOTTED 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
4F
VM-2
SUB-BASE
CONCRETE FLOOR SLAB
BASE COURSE
VAPOR LINER
VAPOR LINER SEALED OUTSIDE OF
CONCRETE COLUMN PER
MANUFACTURER INSTRUCTIONS
SOLID TO SLOTTED 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 SPECIFICATION #4, #5 & #6)
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
REVISION 2
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
REVISIONS
REV DATE DESCRIPTION
0 09/03/21 DEQ SUBMISSION
1 11/08/21 DEQ SUBMISSION - REV 1
2 12/17/21 DEQ SUBMISSION - REV 2
12/17/21
S:\AAA-Master Projects\Akridge\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMP Design_AKR007_REV 12-17-21.dwg, 12/18/2021 8:39:19 AM, DWG To PDF.pc3
FINISHED FLOOR SLAB
2" SCH 40 PVC SET WITHIN GRAVEL LAYER
(SEE DETAIL 14 & 15)
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 (OR ENGINEER
APPROVED EQUIVALENT) 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 17/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 SPECIFICATION #13)
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 17/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
BASE COURSE
FLOOR CLEANOUT, ADJUSTABLE,
4" DIA ZURN INDUSTRIES
MODEL #CO2450-PV4 (OR ENGINEER
APPROVED EQUIVALENT)
SEE DETAIL 16/VM-2
FLUSH 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
SPECIFICATION #4)
RISER DUCT PIPE THROUGH ROOF
FLASHING
ROOFTOP
VM-2A
HEAVTY 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 SPECIFICATION #13)
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 17/VM-2A)
WATERPROOFING AND
RIGID INSULATION
DRAIN
WALL (VARIES)
CONCRETE
FLOOR SLAB
SOLID TO SLOTTED 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 SPECIFICATION #1)
TEMPORARY MONITORING POINT (TYPICAL)
1" SOLID SCH 40 PVC
TEST PLUG (1" PIPE SIZE)
SET PIPE FLUSH WITH SLAB OR
EXTENDED MORE THAN 6" ABOVE
SLAB. SEE SPECIFICATION #7.
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 #12-23
REVISION 2
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
REVISIONS
REV DATE DESCRIPTION
0 09/03/21 DEQ SUBMISSION
1 11/08/21 DEQ SUBMISSION - REV 1
2 12/17/21 DEQ SUBMISSION - REV 2
12/17/21
S:\AAA-Master Projects\Akridge\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMP Design_AKR007_REV 12-17-21.dwg, 12/18/2021 8:40:21 AM, DWG To PDF.pc3
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
REVISION 2
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 IS INTENDED TO BE USED FOR DIRECTION OF VIMS COMPONENT INSTALLATION ONLY AND IS NOT INTENDED TO GUIDE CONSTRUCTION OF BUILDING
STRUCTURAL COMPONENTS. CONSTRUCTION CONTRACTOR SHALL VERIFY CONSISTENCY OF VIMS DETAILS WITH APPLICABLE STRUCTURAL, ARCHITECTURAL, MECHANICAL, & PLUMBING PLANS
AND RESOLVE ANY INCONSISTENCIES PRIOR TO VIMS INSTALLATION.
2.VIMS VAPOR LINER SHALL BE VAPORBLOCK PLUS 20 (VBP20) 20-MIL VAPOR LINER MANUFACTURED BY RAVEN INDUSTRIES (RAVEN). AS AN ALTERNATIVE, DRAGO WRAP 20-MIL VAPOR LINER
MANUFACTURED BY STEGO INDUSTRIES, LLC (STEGO) CAN BE USED, PENDING APPROVAL BY THE ENGINEER.
NOTE THAT ONE VAPOR LINER PRODUCT AND ASSOCIATED ACCESSORIES MUST BE USED THROUGHOUT EACH SYSTEM. TWO DIFFERENT VAPOR LINER PRODUCTS SHOULD NOT BE SEALED
TOGETHER. THE VAPOR LINER SHALL BE 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) SHALL BE INSTALLED BENEATH THE VIMS VAPOR LINER. A SIMILAR HIGH PERMEABILITY STONE MAY BE USED, PENDING APPROVAL BY THE ENGINEER.
THE VAPOR LINER SHALL BE 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 SHALL BE INSTALLED UNDER CMU WALLS
WHICH SUPPORT OCCUPIED ENCLOSED SPACES.
VAPOR BARRIER SHALL BE INSTALLED ON SLABS, WALLS, AND OTHER STRUCTURAL COMPONENTS WHICH COME IN CONTACT WITH BOTH AN OCCUPIABLE ENCLOSED SPACE AND SOIL.
VAPOR BARRIER SHALL BE TERMINATED AT LEAST 1 FT PRIOR TO CONTACT WITH NON-MITIGATED AREAS, INCLUDING THE GROUND SURFACE.
ALL CONCRETE BOXOUTS, INCLUDING BUT NOT LIMITED TO SHOWER/BATH TUB DRAINS, SHALL HAVE A CONTINUOUS VAPOR LINER INSTALLED BELOW.
3.SUB-SLAB SLOTTED VAPOR COLLECTION PIPE SHALL BE THREADED FLUSH JOINT 3" SCH 40 PVC PIPE WITH 0.020" TO 0.060" SLOT WIDTH AND 1/8" SLOT SPACING. AN ALTERNATE SLOT PATTERN,
OR SCH 40 PVC PERFORATED PIPE WITH 5/8" OR SMALLER DIAMETER PERFORATIONS, OR SOIL GAS COLLECTOR MAT (1" X 12"), WITH SIMILAR AIR FLOW CHARACTERISTICS TO THE SLOTTED PIPE
MAY BE USED PENDING APPROVAL BY THE DESIGN ENGINEER. IF CIRCULAR PIPE IS USED, A VENT CAP SHOULD BE INSTALLED ON THE OPEN PIPE END. PVC PIPE JOINTS SHOULD BE DRY-FITTED
BELOW THE SLAB OR CONNECTED WITH SCREWS. SLOTTED COLLECTION PIPING SHALL BE SET WITHIN A MINIMUM 5” BASE COURSE LAYER, WITH APPROXIMATELY 1” OF BASE COURSE
MATERIAL BELOW THE PIPING.
4.4" SCH 40 PVC RISER DUCT PIPING SHALL BE INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT WITH TURBINE FAN (SEE SPECIFICATION
#5). ABOVE-SLAB RISER DUCT PIPE RUNS BETWEEN THE SLAB PENETRATION AND THE ROOFTOP EXHAUST DISCHARGE SHALL BE INSTALLED PER APPLICABLE BUILDING CODE AND AS SPECIFIED
IN THE CONSTRUCTION DOCUMENTS AND DRAWINGS. VERTICAL RISER PIPING SHALL BE CONNECTED WITH PVC PRIMER AND GLUE. VERTICAL RISER PIPING MUST BE INSTALLED PER 2018
NORTH CAROLINA STATE PLUMBING CODE. VIMS BELOW AND ABOVE GRADE SOLID PIPING SHALL NOT BE TRAPPED AND SHALL BE 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 SHALL BE MINIMIZED FROM THE SLAB TO THE ROOFTOP.
5.4" SCH 40 PVC RISER DUCT PIPING SHALL EXTEND IN A VERTICAL ORIENTATION THROUGH THE BUILDING ROOF AND TERMINATE A MINIMUM OF 2 FT ABOVE THE BUILDING ROOF LINE. EMPIRE
MODEL TV04SS STAINLESS STEEL TURBINE VENTILATOR FANS (OR ALTERNATE APPROVED BY ENGINEER) SHALL BE INSTALLED ON THE EXHAUST DISCHARGE END OF EACH RISER DUCT PIPE. THE
4" RISER DUCT PIPE AND THE FAN SHALL BE SECURED TO THE PVC RISER IN A VERTICAL ORIENTATION. EXHAUST DISCHARGE LOCATIONS SHALL BE A MINIMUM OF 10 FT FROM ANY OPERABLE
OPENING OR AIR INTAKE INTO THE BUILDING. NOTE THAT DISCHARGE LOCATIONS ON THE ROOFTOP DEPICTED IN THE VAPOR MITIGATION PLAN MAY BE REPOSITIONED AS LONG AS THE NEW
POSITION MEETS THE REQUIREMENTS PRESENTED ABOVE, PENDING ENGINEER APPROVAL. AN ELECTRICAL JUNCTION BOX (120V REQUIRED) FOR OUTDOOR USE SHALL BE INSTALLED NEAR THE
FAN LOCATION ON THE ROOFTOP FOR POTENTIAL FUTURE CONVERSION TO ELECTRIC FANS, IF REQUIRED. ALL WIRING AND ELECTRICAL SHALL BE INSTALLED PER APPLICABLE BUILDING AND
ELECTRICAL CODES.
6.ABOVE-SLAB ACCESSIBLE RISER DUCT PIPING SHALL BE PERMANENTLY IDENTIFIED BY MEANS OF A TAG OR STENCIL AT A MINIMUM OF ONCE EVERY 10-LINEAR FT WITH "VAPOR MITIGATION.
CONTACT MAINTENANCE". LABELS SHALL ALSO BE FIXED TO THE TURBINE FANS IN AN ACCESSIBLE LOCATION ON THE ROOFTOP.
7.MONITORING POINTS SHALL 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 SHALL BE SET WITHIN
THE BASE COURSE LAYER WITH AN OPEN ENDED PIPE OR PIPE PROTECTION SCREEN AT THE TERMINATION. THE PIPE TERMINATION SHALL BE ENCASED WITHIN THE BASE COURSE LAYER. THE
HORIZONTAL PIPING SHALL BE 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) SHALL BE INSTALLED
AND SET FLUSH WITH THE FINISHED CONCRETE SURFACE. MONITORING POINT INTAKE SHALL BE MINIMUM 5-FT FROM EXTERIOR FOOTING.
7.1.MONITORING POINTS LABELED AS TEMPORARY MAY BE ABANDONED USING AIR-TIGHT SEALANT AND CONCRETE AFTER TESTING PER PERMISSION OF THE DESIGN ENGINEER AND DEQ.
8.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL USE "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN POSSIBLE, AND SHALL NOT USE PRODUCTS CONTAINING THE
COMPOUNDS TETRACHLOROETHENE (PCE) OR TRICHLOROETHENE(TCE). THE CONSTRUCTION CONTRACTOR AND SUB-CONTRACTORS SHALL PROVIDE SAFETY DATA SHEETS (SDS) TO THE
ENGINEER FOR THE PRODUCTS AND MATERIALS USED FOR CONSTRUCTION OF THE VIMS.
9.IN INSTANCES WHERE A THICKENED FOOTING OR RETAINING WALL IS NOT SPECIFIED AT THE EXTENT OF VAPOR LINER, A THICKENED SLAB OR FOOTER SHALL BE 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 SHALL 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 SHALL BE A
MINIMUM OF 5" GREATER IN THICKNESS THAN THE SURROUNDING SLAB.
10.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL AVOID 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 SHALL BE LIMITED AND SMALL DIAMETER SOLID STAKES (I.E. METAL STAKES) SHALL BE USED. IN ALL
CASES, AS FORM BOARDS ARE REMOVED, THE CONTRACTOR OR SUB-CONTRACTORS SHALL RESEAL ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER INSTALLATION
INSTRUCTIONS.CONTRACTORS SHALL AVOID USING HOLLOW PIPING TO SUPPORT UTILITY PIPING IN PREPARATION FOR A CONCRETE SLAB POUR IF SUCH PIPING MAY CAUSE A POTENTIAL FOR
VAPOR MIGRATION POST-CONSTRUCTION.
11.INSPECTIONS: INSPECTIONS OF EACH COMPONENT OF THE VIMS SHALL BE CONDUCTED BY THE ENGINEER, OR ENGINEER'S DESIGNEE, TO CONFIRM VIMS COMPONENTS ARE INSTALLED PER
THE APPROVED DESIGN. THE REQUIRED INSPECTION COMPONENTS INCLUDE: (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
FANS AND RISER DUCT PIPE CONNECTIONS. INSPECTIONS WILL BE COMBINED WHEN POSSIBLE DEPENDING ON THE CONSTRUCTION SEQUENCE/SCHEDULE. THE CONSTRUCTION
CONTRACTOR(S) SHALL COORDINATE WITH THE ENGINEER TO PERFORM THE REQUIRED INSPECTIONS. A MINIMUM 48-HOUR NOTICE SHALL BE GIVEN TO THE ENGINEER PRIOR TO THE
REQUIRED INSPECTION(S).
12.PIPE SLEEVES, IF USED, SHALL BE PROPERLY 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.
13.THE VAPOR BARRIER SHALL BE INSTALLED BETWEEN WATERPROOFING AND ANY DRAINAGE FEATURES INCLUDING DRAINAGE MATS WHERE IT OVERLAPS (SEE DETAIL #16). THE INSTALLER
SHALL CONFIRM THAT THE WATERPROOFING PRODUCTS AND SEALANTS USED DURING CONSTRUCTION ARE COMPATIBLE WITH THE SPECIFIED VAPOR BARRIER.
REVISIONS
REV DATE DESCRIPTION
0 09/03/21 DEQ SUBMISSION
1 11/08/21 DEQ SUBMISSION - REV 1
2 12/17/21 DEQ SUBMISSION - REV 2
12/17/21
S:\AAA-Master Projects\Akridge\AKR.007 LoSo Brownfields Implementation\VIMP\Figures\VIMP Design_AKR007_REV 12-17-21.dwg, 12/18/2021 8:44:06 AM, DWG To PDF.pc3

Attachment C-1

VaporBlock 20 (VBP-20) Product Specification Sheets & Installation Instructions
PRODUCT PART #
VaporBlock® Plus™ 20 ................................................................ VBP20
UNDER-SLAB VAPOR / GAS BARRIER
Under-Slab Vapor/Gas Retarder
© 2018 RAVEN INDUSTRIES INC. All rights reserved.
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.
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
© 2018 RAVEN INDUSTRIES INC. All rights reserved.
Scan QR Code to download
current technical data sheets
via the Raven website.
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. RAVEN INDUSTRIES 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.RavenEFD.com
061318 EFD 1125
RAVEN ENGINEERED FILMSP.O. Box 5107 Sioux Falls, SD 57117-5107Ph: [phone] • TF: [phone] [e-mail]
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.
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 used as part of an active control system for radon or other gas, a ventilation system will be required.
• If designed as a passive system, it is recommended to install a ventilation system that could be converted 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 Raven Butyl Seal tape at the footing-wall connection. Prime concrete surfaces, when necessary, and assure they are dry and clean prior to applying Raven 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 Raven 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 Raven 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 Raven 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 least 12” from the pipe in all directions.
2. Cut four to eight slices about 3/8” less than the diameter of the pipe.
5. Use Raven VaporBoot or VaporSeal™ Tape and overlap 1” at the seam.
4. Tape over the boot perimeter edge with VaporSeal™ Tape.
1. Cut out one of the preformed boot steps (1” to 4”).
2. Tape the underside boot perimeter with 2-sided Butyl Seal Tape.
3. Force the boot over pipe and press tape firmly in place.
4. Use VaporSeal™ Tape
to secure boot to the pipe.
5. Tape around entire boot edge with VaporSeal™ Tape.
VaporBoot Flexible Tapeor VaporSeal™ 4” TapeVaporSeal™ 4” Tape
VaporBlock® Plus™Material
VaporSeal™ 4” Tape
Raven Butyl Seal2-Sided Tape Raven Butyl Seal2-Sided Tape
VaporBoot PlusPreformed Boot 12”(minimum)
3. Force over pipe and tape the underside boot perimeter to existing barrier with 2-sided Butyl 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
Raven Butyl Seal 2-sided Tape Raven 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 Raven Butyl Seal Tape in-between the two
layers. (Fig. 8)
E) After applying Raven 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 Raven Butyl Seal Tape in-between the two layers.
After applying Raven Butyl Seal Tapebetween 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
Raven 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 to minimize the amount of POUR-N-SEAL™ necessary to seal around all penetrations.
B) Once barrier is in place, remove soil or other particles with a dry cloth or a fine broom to allow for improved adhesion to the POUR-N-SEAL™ liquid.
C) Create a dam around the penetration area approximately 2” away from the pipe or other vertical penetrations by removing the release liner from the back of a 1” weather stripping foam and adhere to the vapor 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 sealant completely around penetrations creating a complete seal (Fig. 12-13).
E) DO NOT leave excess POUR-N-SEAL™ in plastic container for longer than 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
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. RAVEN INDUSTRIES 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 wwww.RavenEFD.com
ENGINEERED FILMSP.O. Box 5107 Sioux Falls, SD 57117-5107Ph: [phone] • TF: [phone]
[e-mail]
020316 EFD 1127
VAPORBLOCK® PLUS™ PROTECTION
Fig. 16
Fig. 18
Fig. 17
* Patent Pending
© Raven 2016. All Rights Reserved.

Attachment C-2

Drago Wrap Product Specification Sheets & Installation Instructions
P1 OF 2
DRAGO® WRAPVAPOR INTRUSION BARRIER
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 2/22/2019
1. PRODUCT NAME
DRAGO WRAP VAPOR INTRUSION BARRIER
2. MANUFACTURER
c/o Stego® Industries, LLC*
216 Avenida Fabricante, Suite 101
San Clemente, CA 92672
Sales, Technical Assistance
Ph: [phone]
Fx: [phone]
www.stegoindustries.com
3. PRODUCT DESCRIPTION
TABLE 4.1: PHYSICAL PROPERTIES OF DRAGO WRAP VAPOR INTRUSION BARRIER
PROPERTY TEST RESULTS
Under Slab Vapor Retarders ASTM E1745 – Standard Specification for Water Vapor Retarders Used in Contact with Soil or Granular Fill under Concrete Slabs ASTM E1745 Compliant
Water Vapor Permeance ASTM F1249 – Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor 0.0069 perms
Push-Through Puncture ASTM D4833 – Test Method for Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products 183.9 Newtons
Tensile Strength ASTM D882 – Test Method for Tensile Properties of Thin Plastic Sheeting 53.5 lbf/in
Permeance After Conditioning ASTM E154 Section 8, F1249 – Permeance after wetting, drying, and soaking 0.0073 perms(ASTM E1745 ASTM E154 Section 11, F1249 – Permeance after heat conditioning 0.0070 permsSections 7.1.2 - 7.1.5) ASTM E154 Section 12, F1249 – Permeance after low temperature conditioning 0.0062 perms ASTM E154 Section 13, F1249 – Permeance after soil organism exposure 0.0081 perms
Hydrocarbon Attenuation Factors Contact Stego Industries’ Technical Department
Chlorinated Solvent Attenuation Factors Contact Stego Industries’ Technical Department
Methane Transmission Rate ASTM D1434 – Test Method for Determining Gas Permeability Characteristics of 7.0 GTR** Plastic Film and Sheeting (mL(STP)/m2*day)
Radon Diffusion Coefficient K124/02/95 9.8 x 10-14 m2/second
Thickness 20 mil
Roll Dimensions 14' x 105' or 1,470 ft2
Roll Weight 150 lb
Note: perm unit = grains/(ft2*hr*in-Hg) ** GTR = Gas Transmission Rate
USES: Drago Wrap is specifically engineered to attenuate volatile organic compounds (VOCs) and serve as a below-slab
moisture vapor barrier.
COMPOSITION: Drago Wrap is a multi-layered plastic extrusion that combines uniquely designed materials with only
high grade, prime, virgin resins.
ENVIRONMENTAL FACTORS: Drago Wrap can be used in systems for the control of various VOCs including hydrocarbons,
chlorinated solvents, radon, methane, soil poisons, and sulfates.
4. TECHNICAL DATA
Continued... Note – legal notice on page 2.
DRAGO® WRAPVAPOR INTRUSION BARRIER
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 2/22/2019
DATA SHEETS ARE SUBJECT TO CHANGE. FOR MOST CURRENT VERSION, VISIT WWW.STEGOINDUSTRIES.COM
[phone] | www.stegoindustries.com
*Stego Industries, LLC (“Stego”) is the exclusive Representative for Drago Wrap and Pango Wrap. All designated trademarks are the intellectual property
of Stego or the entity for which it is acting as a Representative. Installation, Warranty, State Approval Information and Disclosure of Representative Status: www.stegoindustries.com/legal. ©2019 Stego Industries, LLC. All rights reserved.
5. INSTALLATION
UNDER SLAB: Unroll Drago Wrap over a tamped aggregate, sand, or earth base. Overlap all seams a minimum of 12
inches and tape using Drago® Tape. All penetrations must be sealed using a combination of Drago Wrap and Drago
Accessories.
Review Drago Wrap’s complete installation instructions prior to installation.
6. AVAILABILITY & COST
Drago Wrap is available nationally through our network of building supply distributors. For current cost information,
contact your local Drago distributor or Stego Industries’ Sales Representative.
7. WARRANTY
Stego Industries, LLC believes to the best of its knowledge, that specifications and recommendations herein are
accurate and reliable. However, since site conditions are not within its control, Stego Industries does not guarantee
results from the use of the information provided and disclaims all liability from any loss or damage. Stego Technology,
LLC does offer a limited warranty on Drago Wrap. Please see www.stegoindustries.com/legal.
8. MAINTENANCE
Store Drago Wrap in a dry and temperate area.
9. TECHNICAL SERVICES
Technical advice, custom CAD drawings, and additional information can be obtained by contacting Stego Industries or
by visiting the website.
Contact Number: [phone]
Website: www.stegoindustries.com
10. FILING SYSTEMS
• www.stegoindustries.com
P2 OF 2
INSTALLATIONINSTRUCTIONS
DRAGO® WRAP
VAPOR INTRUSION BARRIER
Engineered protection to create a healthy built environment.
2. Unroll Drago Wrap over the area where the slab is to be placed.
Drago Wrap should completely cover the concrete placement
area. All joints/seams should be overlapped a minimum of
12 inches and taped using Drago® Tape. (Fig. 1). If additional
protection is needed, install DragoTack™ Tape in between the
overlapped seam in combination with Drago Tape on top of the
seam.
NOTE: The area of adhesion should be free from dust, dirt, moisture,
and frost to allow maximum adhesion of the pressure-sensitive tape. Ensure that all seams are taped with applied pressure to allow for
maximum and continuous adhesion of the pressure-sensitive Drago Tape. Adhesives should be installed above 40°F. In temperatures
below 40°F, take extra care to remove moisture/frost from the area
of adhesion.
3. ASTM E1643 requires sealing the perimeter of the slab. Extend
vapor retarder over footings and seal to foundation wall or
grade beam at an elevation consistent with the top of the slab
or terminate at impediments such as waterstops or dowels.
Consult the structural and environmental engineer of record
before proceeding.
IMPORTANT: Please read these installation instructions completely, prior to beginning any Drago Wrap installation. The following installation
instructions are generally based on ASTM E1643 – Standard Practice for Selection, Design, Installation, and Inspection of Water Vapor Retarders
Used in Contact with Earth or Granular Fill Under Concrete Slabs. There are specific instructions in this document that go beyond what is stated in
ASTM E1643 to take into account vapor intrusion mitigation. If project specifications call for compliance with ASTM E1643, then be sure to review
the specific installation sections outlined in the standard along with the techniques referenced in these instructions.
DRAGO TAPE
Minimum 12” overlap
VAPOR INTRUSION BARRIER
Fig.1: UNDER-SLAB INSTALLATION
DRAGO® WRAP VAPOR INTRUSION BARRIERINSTALLATION INSTRUCTIONS
UNDER-SLAB INSTRUCTIONS:
FOOTING
DRAGOTACK TAPE
VAPOR INTRUSION BARRIER
Fig.2a: SEAL TO PERIMETER WALL Fig. 2b: SEAL TO FOOTING
FOOTING
DRAGOTACK TAPE
VAPOR INTRUSION BARRIER
SEAL TO PERIMETER WALL OR FOOTING WITH DRAGOTACK
TAPE: (Fig. 2a and 2b)
a. Make sure area of adhesion is free of dust,
dirt, debris, moisture, and frost to allow
maximum adhesion.
b. Remove release liner on one side and stick to
desired surface.
c. When ready to apply Drago Wrap, remove the
exposed release liner and press firmly against
DragoTack Tape to secure.
d. If a mechanical seal is needed, fasten a
termination bar over the top of the Drago Wrap
inline with the DragoTack Tape.
NOTE: If sealing to the footing, the footing should receive
a hand float finish to allow for maximum adhesion.
1. Drago Wrap has been engineered to be installed over a tamped aggregate, sand, or earth base. It is not typically necessary
to have a cushion layer or sand base, as Drago Wrap is tough enough to withstand rugged construction environments.
NOTE: Drago Wrap must be installed with the gray facing the subgrade.
P2 of 4
Continued ... Note - legal notice on last page.
DETAIL PATCH FOR PIPE PENETRATION SEALING: (Fig. 4b)a. Install Drago Wrap around pipe penetrations by slitting/cutting material as needed. Try to minimize void space
created.
b. If Drago Wrap is close to pipe and void space is minimized, proceed to step d.
c. If void space exists, then
i. Cut a detail patch to a size and shape that creates a 6-inch overlap on all edges around the void space at
the base of the pipe.
ii. Cut an “X” slightly smaller than the size of the pipe diameter in the center of the detail patch and slide
tightly over pipe.
iii. Tape the edges of the detail patch using Drago Tape.
d. Seal around the base of the pipe using Drago Tape and/or Drago Sealant and Drago Sealant Form.
i. If Drago Sealant is used to seal around pipe, make sure Drago Wrap is flush with the base of the
penetration prior to pouring Drago Sealant.
5. IMPORTANT: ALL PENETRATIONS MUST BE SEALED. All pipe, ducting, rebar, and block outs should be sealed using
Drago Wrap, Drago Tape, and/or Drago® Sealant and Drago® Sealant Form. (Fig. 4a). Drago accessories should be
sealed directly to the penetrations.
DRAGO TAPE
DAMAGED AREA
DRAGO TAPE DRAGO TAPE
SMALL HOLE
VAPOR INTRUSION BARRIER
VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER
Fig. 3: SEALING DAMAGED AREAS
4. In the event that Drago Wrap is damaged during or after installation, repairs must be made. Cut a piece of Drago Wrap
to a size and shape that covers any damage by a minimum of 6 inches in all directions. Clean all adhesion areas of dust,
dirt, moisture, and frost. Tape down all edges using Drago Tape. (Fig. 3)
MINIMAL VOID SPACE CREATED
DRAGO SEALANTDRAGO TAPE
OR DRAGO SEALANT FORM
VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER
Fig. 4a: PIPE PENETRATION SEALING
DRAGO TAPE
LARGE VOID SPACE CREATED
DRAGO SEALANTDRAGO TAPE
OR DRAGO SEALANT FORM
VAPOR INTRUSION BARRIERVAPOR INTRUSION BARRIERVAPOR INTRUSION BARRIER
VAPOR INTRUSION BARRIER
Fig. 4b: DETAIL PATCH FOR PIPE PENETRATION SEALING
Continued ... Note - legal notice on last page.
P3 of 4
DRAGO® WRAP VAPOR INTRUSION BARRIERINSTALLATION INSTRUCTIONS
STEGO INDUSTRIES, LLC • SAN CLEMENTE, CA • 949-257-4100 • 877-464-7834 • www.stegoindustries.com
*Stego Industries, LLC (“Stego”) is the exclusive Representative for Drago Wrap and Pango Wrap. All designated trademarks are the intellectual property of Stego or the entity for which it is acting as a Representative. Installation, Warranty, State Approval Information and Disclosure of Representative Status: www.stegoindustries.com/legal. ©2019 Stego Industries, LLC. All rights reserved. 11/2019
NOTE: While Drago Wrap installation instructions are based on ASTM E1643 - Standard Practice for Selection, Design, Installation, and Inspection of Water Vapor Retarders Used in Contact with Earth or Granular Fill Under Concrete Slabs, these instructions are meant to be used as a guide, and do not take into account specific job site situations. Consult local building codes and regulations along with the building owner or owner’s representative before proceeding. If you have any questions regarding the above-mentioned installation instructions or products, please call us at 877-464-7834 for technical assistance. While Stego Industries’ employees and representatives may provide technical assistance regarding the utility of a specific installation practice or Stego product, they are not authorized to make final design decisions.
MULTIPLE PIPE PENETRATION SEALING: (Fig. 5)
NOTE: Multiple pipe penetrations in close proximity may be most efficiently sealed using Drago Wrap, Drago
Sealant, and Drago Sealant Form for ease of installation.
a. Cut a hole in Drago Wrap such that the membrane fits over and around the base of the pipes as closely as
possible, ensuring that it is flush with the base of the penetrations.
b. Install Drago Sealant Form continuously around the entire perimeter of the group of penetrations and at least
1 inch beyond the terminating edge of Drago Wrap.
c. Pour Drago Sealant inside of Drago Sealant Form to create a seal around the penetrations.
d. If the void space between Drago Wrap and the penetrations is not minimized and/or the base course allows for
too much drainage of sealant, a second coat of Drago Sealant may need to be poured after the first application
has cured.
IMPORTANT: AN INSTALLATION COMPLETED PER THESE INSTRUCTIONS SHOULD CREATE A MONOLITHIC MEMBRANE
BETWEEN ALL INTERIOR INTRUSION PATHWAYS AND VAPOR SOURCES BELOW THE SLAB AS WELL AS AT THE SLAB
PERIMETER. THE UNDERLYING SUBBASE SHOULD NOT BE VISIBLE IN ANY AREA WHERE CONCRETE WILL BE PLACED. IF
REQUIRED BY THE DESIGN ENGINEER, ADDITIONAL INSTALLATION VALIDATION CAN BE DONE THROUGH SMOKE TESTING.
Stego Industries* recommends the use of BEAST vapor barrier-safe concrete accessories, to help eliminate the use of non-permanent penetrations in Drago Wrap installations.
MINIMAL VOID SPACE CREATED
DRAGO SEALANT
DRAGO SEALANT FORM DRAGO SEALANT FORM DRAGO SEALANT FORM
DRAGO SEALANT
VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER VAPOR INTRUSION BARRIER
Fig. 5: MULTIPLE PIPE PENETRATION SEALING
BEAST® CONCRETE ACCESSORIES - VAPOR BARRIER SAFE
BEAST® SCREED BEAST® HOOK
P3 of 4
BEAST® FORM STAKE
Locate itand lock it down!Improve efficiency and maintain concrete floor levelness with the BEAST SCREED SYSTEM!
The Stego barrier-safe forming system that prevents punctures in the vapor barrier.
P1 OF 2
DRAGO® TAPE
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 11/27/2019
1. PRODUCT NAME
DRAGO TAPE
2. MANUFACTURER
c/o Stego® Industries, LLC*
216 Avenida Fabricante, Suite 101
San Clemente, CA 92672
Sales, Technical Assistance
Ph: [phone]
Fx: [phone]
www.stegoindustries.com
3. PRODUCT DESCRIPTION
USES: Drago Tape is a low-permeance tape designed for protective sealing, seaming, splicing, and patching applications
where a highly conformable material is required. It has been engineered to bond specifically to Drago® Wrap Vapor
Intrusion Barrier, making it ideal for sealing Drago Wrap seams and penetrations.
COMPOSITION: Drago Tape is a multi-layered plastic extrusion that combines uniquely designed materials with only
high grade, prime, virgin resins, and an acrylic, pressure-sensitive adhesive.
SIZE: Drago Tape is 3.75" x 180'. Drago Tape ships 12 rolls in a case.
4. TECHNICAL DATA
APPLICABLE STANDARDS:
Pressure Sensitive Tape Council (PSTC)
• PSTC 101 – International Standard for Peel Adhesion of Pressure Sensitive Tape
• PSTC 107 – International Standard for Shear Adhesion of Pressure Sensitive Tape
American Society for Testing & Materials (ASTM)
• ASTM E1643 – Standard Practice for Selection, Design, Installation, and Inspection of Water Vapor Retarders
Used In Contact with Earth or Granular Fill under Concrete Slabs.
TABLE 4.1: PHYSICAL PROPERTIES OF DRAGO TAPE
PROPERTY TEST RESULTS
Total Thickness 8 mil
Permeance ASTM F1249 0.031 perms
Tensile Strength MD ASTM D882 20.5 lbf/in
Elongation (at break) MD ASTM D882 702%
180° Peel Adhesion PSTC 101 20-min dwell to Drago Wrap 50.1 oz/in
PSTC 101 24-hour dwell to Drago Wrap 92.9 oz/in
Shear Adhesion PSTC 107 24-hour dwell (1" x 1", 1kg/wt) to Drago Wrap 188 minutes
Note: perm unit = grains/(ft2*hr*in-Hg)
Continued... Note – legal notice on page 2.
DRAGO® TAPE
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 11/27/2019
DATA SHEETS ARE SUBJECT TO CHANGE. FOR MOST CURRENT VERSION, VISIT WWW.STEGOINDUSTRIES.COM
[phone] | www.stegoindustries.com
*Stego Industries, LLC (“Stego”) is the exclusive Representative for Drago Wrap and Pango Wrap. All designated trademarks are the intellectual property
of Stego or the entity for which it is acting as a Representative. Installation, Warranty, State Approval Information and Disclosure of Representative Status: www.stegoindustries.com/legal. ©2019 Stego Industries, LLC. All rights reserved.
5. INSTALLATION
SEAMS: Overlap Drago Wrap a minimum 12 inches and seal with Drago Tape. Make sure the area of adhesion is free
from dust, moisture and frost to allow maximum adhesion of the pressure-sensitive tape.
PIPE PENETRATION SEALING:
• Install Drago Wrap around pipe by slitting/cutting material.
• If void space is minimal, seal around base of pipe with Drago Tape and/or Drago® Sealant and Drago® Sealant Form.
DETAIL PATCH FOR PIPE PENETRATION SEALING:
• Cut a piece of Drago Wrap that creates a 6 inch overlap around all edges of the void space.
• Cut an “X” slightly smaller than the size of the pipe diameter in the center of the detail patch.
• Slide detail patch over pipe, secure tightly.
• Tape down all sides of detail patch with Drago Tape.
• Seal around base of pipe with Drago Tape and/or Drago Sealant and Drago Sealant Form.
Drago Tape should be installed above 40°F. In temperatures below 40°F, take extra care to remove moisture or frost
from the area of adhesion. Ensure that the entirety of all seams are taped with applied pressure to allow for maximum
and continuous adhesion of the pressure-sensitive Drago Tape.
Review Drago Wrap’s complete installation instructions prior to installation.
6. AVAILABILITY & COST
Drago Tape is available nationally through our network of building supply distributors. For current cost information,
contact your local Drago distributor or Stego Industries’ Sales Representative.
7. WARRANTY
Stego Industries, LLC believes to the best of its knowledge, that specifications and recommendations herein are
accurate and reliable. However, since site conditions are not within its control, Stego Industries does not guarantee
results from the use of the information provided and disclaims all liability from any loss or damage. Stego Technology,
LLC does offer a limited warranty on Drago Wrap. Please see www.stegoindustries.com/legal.
8. MAINTENANCE
Store Drago Tape in a dry and temperate area.
9. TECHNICAL SERVICES
Technical advice, custom CAD drawings, and additional information can be obtained by contacting Stego Industries or
by visiting the website.
Contact Number: [phone]
Website: www.stegoindustries.com
10. FILING SYSTEMS
• www.stegoindustries.com
P2 OF 2
P1 OF 2
DRAGOTACK™ TAPE
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 2/22/2019
1. PRODUCT NAME
DRAGOTACK TAPE
2. MANUFACTURER
c/o Stego® Industries, LLC*
216 Avenida Fabricante, Suite 101
San Clemente, CA 92672
Sales, Technical Assistance
Ph: [phone]
Fx: [phone]
www.stegoindustries.com
3. PRODUCT DESCRIPTION
TABLE 4.1: PHYSICAL PROPERTIES OF DRAGOTACK TAPE
PROPERTY TEST RESULTS
Dimensions 2" x 50'
Total Thickness 30 mil
Color Grey
Material Synthetic rubber blend
Permeance ASTM F1249 0.03 perms (30 mil) Adhesion to Steel ASTM D1000 12.5 lbs/in width
Chemical Resistance No significant change to(TCE, PCE, Toluene, Xylene) ASTM D471 / D543 mass or volume.
Installation Temperature 40°F / 110°
In Service Temperature Range -20°F / +140°F
VOC Content No VOCs, 100% solids
Note: perm unit = grains/(ft2*hr*in-Hg)
USES: DragoTack Tape is a solvent-resistant, double-sided adhesive strip used to bond and seal Drago® Wrap Vapor
Intrusion Barrier to concrete, masonry, wood, metal, and other surfaces. DragoTack Tape is a flexible and moldable
material to allow for a variety of applications and installations.
COMPOSITION: DragoTack Tape is made from a solvent-resistant blend of synthetic rubber and resins.
SIZE: DragoTack Tape is 2" x 50'. DragoTack Tape ships 12 rolls in a case.
4. TECHNICAL DATA
Continued... Note – legal notice on page 2.
DRAGOTACK™ TAPE
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 2/22/2019
DATA SHEETS ARE SUBJECT TO CHANGE. FOR MOST CURRENT VERSION, VISIT WWW.STEGOINDUSTRIES.COM
[phone] | www.stegoindustries.com
*Stego Industries, LLC (“Stego”) is the exclusive Representative for Drago Wrap and Pango Wrap. All designated trademarks are the intellectual property
of Stego or the entity for which it is acting as a Representative. Installation, Warranty, State Approval Information and Disclosure of Representative Status: www.stegoindustries.com/legal. ©2019 Stego Industries, LLC. All rights reserved.
5. INSTALLATION
TO WALLS AND FOOTINGS: Make sure the area of adhesion is free of dust, dirt, debris, moisture, and frost to allow
maximum adhesion. Remove release liner on one side and stick to desired surface. When ready to apply Drago Wrap,
remove the exposed release liner and press Drago Wrap firmly against DragoTack Tape to secure.
Cut DragoTack Tape using a utility knife or scissors. Cut DragoTack Tape before removing the release liner for easier
cutting. Install DragoTack Tape between 40°F and 110°F.
Review Drago Wrap’s complete installation instructions prior to installation.
6. AVAILABILITY & COST
DragoTack Tape is available nationally through our network of building supply distributors. For current cost information,
contact your local Drago distributor or Stego Industries’ Sales Representative.
7. WARRANTY
Stego Industries, LLC believes to the best of its knowledge, that specifications and recommendations herein are
accurate and reliable. However, since site conditions are not within its control, Stego Industries does not guarantee
results from the use of the information provided and disclaims all liability from any loss or damage. Stego Technology,
LLC does offer a limited warranty on Drago Wrap. Please see www.stegoindustries.com/legal.
8. MAINTENANCE
Store DragoTack Tape in a dry and temperate area.
9. TECHNICAL SERVICES
Technical advice, custom CAD drawings, and additional information can be obtained by contacting Stego Industries or
by visiting the website.
Contact Number: [phone]
Website: www.stegoindustries.com
10. FILING SYSTEMS
• www.stegoindustries.com
P2 OF 2
P1 OF 2
DRAGO® SEALANT FORM
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 2/22/2019
1. PRODUCT NAME
DRAGO SEALANT FORM
2. MANUFACTURER
c/o Stego® Industries, LLC*
216 Avenida Fabricante, Suite 101
San Clemente, CA 92672
Sales, Technical Assistance
Ph: [phone]
Fx: [phone]
www.stegoindustries.com
3. PRODUCT DESCRIPTION
USES: Drago Sealant Form is used in conjunction with Drago® Sealant to help create an efficient and effective seal
around pipe penetrations in Drago® Wrap Vapor Intrusion Barrier.
COMPOSITION: Drago Sealant Form is a low-density, cross-linked, closed-cell polyethylene foam with an acrylic,
pressure-sensitive adhesive.
SIZE: Drago Sealant Form is ½" x ½" x 24". Drago Sealant Form comes in 200 pieces per case (10 boxes of 20 pieces).
4. TECHNICAL DATA
TABLE 4.1: PHYSICAL PROPERTIES OF DRAGO SEALANT FORM
PROPERTY RESULTS
Dimensions ½” x ½” x 24”
Color White
Weight 0.11 oz (3.1 grams)
Continued... Note – legal notice on page 2.
5. INSTALLATION
PENETRATIONS: Make sure the area of adhesion is free of dust, debris, moisture, and frost to allow maximum adhesion.
When ready to apply to Drago Wrap, remove the release liner and press Drago Sealant Form firmly against Drago Wrap
to secure. Install Drago Sealant Form continuously around the entire perimeter of the penetration(s) and at least 1 inch
beyond the terminating edge of Drago Wrap. Install Drago Sealant Form between 40°F and 110°F. Pour Drago Sealant
inside of Drago Sealant Form to create a seal around the penetration(s).
Review Drago Wrap’s complete installation instructions prior to installation.
6. AVAILABILITY & COST
Drago Sealant Form is available nationally through our network of building supply distributors. For current cost
information, contact your local Drago distributor or Stego Industries’ Sales Representative.
DRAGO® SEALANT FORM
A STEGO TECHNOLOGY, LLC INNOVATION | VAPOR RETARDERS 07 26 00, 03 30 00 | VERSION: 2/22/2019
DATA SHEETS ARE SUBJECT TO CHANGE. FOR MOST CURRENT VERSION, VISIT WWW.STEGOINDUSTRIES.COM
[phone] | www.stegoindustries.com
*Stego Industries, LLC (“Stego”) is the exclusive Representative for Drago Wrap and Pango Wrap. All designated trademarks are the intellectual property
of Stego or the entity for which it is acting as a Representative. Installation, Warranty, State Approval Information and Disclosure of Representative Status: www.stegoindustries.com/legal. ©2019 Stego Industries, LLC. All rights reserved.
7. WARRANTY
Stego Industries, LLC believes to the best of its knowledge, that specifications and recommendations herein are
accurate and reliable. However, since site conditions are not within its control, Stego Industries does not guarantee
results from the use of the information provided and disclaims all liability from any loss or damage. Stego Technology,
LLC does offer a limited warranty on Drago Wrap. Please see www.stegoindustries.com/legal.
8. MAINTENANCE
Store Drago Sealant Form in a dry and temperate area.
9. TECHNICAL SERVICES
Technical advice, custom CAD drawings, and additional information can be obtained by contacting Stego Industries or
by visiting the website.
Contact Number: [phone]
Website: www.stegoindustries.com
10. FILING SYSTEMS
• www.stegoindustries.com
P2 OF 2

Attachment C-3

Empire Passive Ventilator Fan Product Specification Sheet
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

Attachment C-4

Big Foot Slotted PVC Pipe Product Specification Sheet

Attachment C-5

Zurn Industries Floor Clean-out Product Specification Sheet

Attachment C-6

Soil Gas Collector Mat Product Information and Installation Guide
Soil Gas Collector Mat PDS 05-140-1
Safety data for our custom-formed, high-impact polystyrene core is shown below.
RECOMMENDED MAXIMUM OCCUPATIONAL EXPOSURE LIMITS
PHYSICAL DATA FIRE HANDLING MEASURES
ECOLOGICAL INFORMATION & DISPOSAL
Component CAS No. Exposure Limits Hazard Data
OSHA—Pel.
Polystyrene 9003-55-6 None established No hazardous ingredients
Properties Data
Form Molded Sheet
Color Black
Odor None
Boiling Point Not applicable
Melting Point (°F) 270
Flash Point (°F) Not applicable
Flammable Limits (°F) Not applicable
VOC 0%
Volatility <0.75% Moisture
Specific gravity 1.02–1.08
Solubility in Water Not soluable
Properties
Extinguishing Media
Fire Fighting Procedure
Properties
Ecological information
Toxicological
Disposal
Data
Water Spray (except when fire is of electrical origin), Foam, Dry powder, CO2
Self-contained breathingapparatus & suitable protective equipment
Data
Not associated with any
known ecological problems
No negative effects on
humans
Polystyrene recycles well.
Can be disposed of as
solid waste or burned
in a suitable installation
subject to local regulations.
Effluents disposal should
also be in accordance
with local legislation.
www.soilgasmat.com 719-444-0646 [e-mail]
Product Materials
& Safety Information
Made inthe USA
Perfect for Radon Control Systems in new home construction
The economical alternative to aggregate systems—quick and easy installation
STABILITY & REACTIVITY
SPECIAL HANDLING INFORMATION
Properties Data
Stablitity Stable
Incompatibility (Materials to avoid) Can react with strong oxidixers
Hazardous Decomposition Carbon dioxide, carbon monoxide, various hydrocarbons
Conditions to avoid None
Description Information
Handling & Storage Precaution Protect against flame & intense heat. Avoid breathing hot vapors.
Eye Protection, Recommended Use OSHA approved safety glasses when handling
Skin Wash with soap & water. Get medical attention if irritation develops
or persists.
Other Clothing & Equipment Gloves recommended due to sharp edges.
Work Practices, Hygiene Use standard work practices for hygienic safety.
Handling & Storage, Other Store in well-ventillated area. Avoid extreme heat & sources of ignition or
open flame.
Protective Measures, Maintenance Not applicable
www.soilgasmat.com 719-444-0646 [e-mail]
To the best of our knowledge, the information presented herein is accurate.However, it is not a warranty or a guarantee and is provided for reference only.
Soil Gas Collector Mat PDS 05-140-1
The economical alternative to aggregate systems—quick and easy installation
CUSPATED PLASTIC
COVER FABRIC
Material Physical Properties
Property Test Method Value
Specific Gravity (g/cc) ASTM D-792 1.04
Melt Flow @ 200°C/5000g (g/10 min) ASTM D-1238 2.5
Tensile Strength @ Yield (psi) ASTM D-638 2,900
Tensile Modulus (psi) ASTM D-638 275,000
Elongation @ Break (%) ASTM D-638 70
Flexural Modulus (psi) ASTM D-790 300,000
Impact Strength, Notched Izod @ 73°F (ft-lb/in) ASTM D-256 2.1
Heat Deflection Temperature @ 264 psi (°F) ASTM D-648 183
Vicat Softening Point (°F) ASTM D-1525 210
Property Test Method Value
Grab Tensile (lbs) ASTM D4632 130
Elongation (%) ASTM D4632 > 50
Trapezoid Tear (lbs) ASTM D4533 60
Puncture (lbs) ASTM D4833 41
Mullen Burst (psi) ASTM D3786 140
AOS (U.S. sieve number) ASTM D4571 70
Permittivity (sec-1) ASTM D4491 0.8
Permeability (cm/sec) ASTM D4491 0.04
Water Flow (gal/min/sf) ASTM D4491 60
UV Stability (%) ASTM D4355 70
www.soilgasmat.com 719-444-0646 [e-mail]
Product
Data Sheet
Made inthe USA
Perfect for Radon Control Systems in new home construction
The economical alternative to aggregate systems—quick and easy installation
www.soilgasmat.com 719-444-0646 [e-mail]
To the best of our knowledge, the information presented herein is accurate.However, it is not a warranty or a guarantee and is provided for reference only.
BINDING METHOD
Material Physical Properties CONTINUED
Property Test Method Value
External Binder Standard Sewn
Type Stitching Standard Lock Stitch
Type Thread Standard HB92 Nylon
Tensile Strength (lbs) ASTM D4632 11
Thread Gage Standard 2 IOx4 denier
Chemically Impervious Standard MI Natural
Soil Gas Collector Mat PDS 05-140-1
Safety data for our non-woven, spun-bonded, polypropylene, gray geotextile fabric is shown below.
PHYSICAL DATA FIRE HANDLING MEASURES
ECOLOGICAL INFORMATION & DISPOSAL
Properties Data
Form Molded Sheet
Color Black
Odor None
Boiling Point Not applicable
Melting Point (°F) 270
Flash Point (°F) Not applicable
Flammable Limits (°F) Not applicable
Auto ignition temperature Not applicable
Vapor Pressure (Pascal) Not volatile
Density (g/cm3) @20 ºC 0.91
Solubility in Water Not soluable
Thermal decomposition (ºF) Above 570
Properties
Extinguishing Media
Fire Fighting Procedure
Properties
Ecological information
Toxicological
Disposal
Data
Water Spray (except when fire is of electrical origin), Foam, Dry powder of CO2
Self-contained breathingapparatus & suitable protective equipment
Data
Not associated with any
known ecological problems
No negative effects on
humans
Polystyrene recycles well.
Can be disposed of as
solid waste or burned
in a suitable installation
subject to local regulations.
Effluents disposal should
also be in accordance
with local legislation.
www.soilgasmat.com 719-444-0646 [e-mail]
Product Materials
& Safety Information
RECOMMENDED MAXIMUM OCCUPATIONAL EXPOSURE LIMITS
Component CAS No. Exposure Limits Hazard Data
OSHA—Pel.
Polystyrene 9003-07-0 None established No hazardous ingredients
Made inthe USA
Perfect for Radon Control Systems in new home construction
The economical alternative to aggregate systems—quick and easy installation
STABILITY & REACTIVITY
SPECIAL HANDLING INFORMATION
Properties Data
Stablitity Stable
Incompatibility (Materials to avoid) Can react with strong oxidixers, base, or acid
Hazardous Decomposition Carbon dioxide, carbon monoxide, low molecular weight oxygenated organic
Conditions to avoid None
Description Information
Handling & Storage Precaution Avoid breathing hot vapors, oiled mists, and airborne fibers.
Eye Protection, Recommended Use OSHA approved safety glasses when handling rolls
Skin Wash with soap & water. Get medical attention if irritation develops
or persists.
Other Clothing & Equipment Not applicable
Work Practices, Hygiene Use standard work practices for hygienic safety.
Handling & Storage, Other Store rolls In accordance with good material handling practice
Protective Measures, Maintenance Not applicable
www.soilgasmat.com 719-444-0646 [e-mail]
To the best of our knowledge, the information presented herein is accurate.However, it is not a warranty or a guarantee and is provided for reference only.
Soil Gas Collector Mat PDS 05-140-1
Our non-woven, spun-bonded, polypropylene, gray geotextile fabric with the minimum
values shown below.
www.soilgasmat.com 719-444-0646 [e-mail]
Product Materials—
Technical Specifications
& Performance
Property Test Method Value
Grab Tensile Strength (lbs) ASTM D 4632 130
Elongation (%) ASTM D 4632 >50
Trapezoid Tear (lbs) ASTM D 4533 60
Puncture (lbs) ASTM D 4833 41
Mullen Burst (psi) ASTM D 3786 140
AOS (U.S. sieve no.) ASTM D 4751 70
Permittivity (sec-1) ASTM D 4491 0.8
Permeability (cm/sec) ASTM D 4491 0.04
Vertical Water Flow Rate (gal/min/sf) ASTM D 4491 60
UV Stability (%) ASTM D 4355 70
Made inthe USA
Soil Gas Collector Mat PDS 05-140-1
Our custom-formed, high-impact polystyrene core with the minimum values shown below.
www.soilgasmat.com 719-444-0646 [e-mail]
Product Materials—
Technical Specifications
& Performance
Properties Test Method Value
Specific Gravity ASTM D 792 1.04
Melt Flow (g/10min) ASTM D 1238 2.5
Tensile @ Yield (psi) ASTM D 638 2900
Tensile Modulus (psi) ASTM D 638 275,000
Elongation @ Break (%) ASTM D 638 70
Flexural Modulus (psi) ASTM D 790 300,000
Notched Izod @ 73ºF (ft-lb/in) ASTM D 256 2.1
HDT @ 264 psi (ºF) ASTM D 648 183
Vicat Softening Point (ºF) ASTM D 1525 210
Made in
the USA
SOIL GAS COLLECTOR MAT
Installation Guide
Radon Ready New Construction
Time-saving, low-cost solution
Easy Installation
Reduce Liability!
Used in all 50 states and
Internationally
Compliant under multiple codes:
AARST-ANSI, ASTM,
IRC Appendix F,
EPA, HUD, and more!
Simple, modern solution for soil
gases: radon, vapor, and VOCs
www.RadonMat.comPhotos, videos, & more @
MADE IN THE USA
SOIL GAS COLLECTOR MAT FOR RADON READY NEW CONSTRUCTION
According to the US EPA’s model stan-dards for radon control systems in new building construction, a means for col-lecting soil gas should be installed be-neath the slab.
More and more mitigators and buildiers are using PDS’ soil gas collector mat because its installation does not entail any special coordination with plumb-ers or other site contractors. Low pro-file mat saves time as it removes the need for trenching. Just lay radon mat down around the inside perimeter of the foundation, secure it with spikes or landscaping staples, and pour the con-crete.
SGC mat is superior to other mat sys-tems because of its thickness and it has a geotextile fabric cloth surround-ing the entire mat material. This fea-ture eliminates the need to lay a plas-tic barrier or sheet on top of the mat to protect the matrix. Using plastic sheeting can cause concrete cracking due to differential dewatering. The full fabric design greatly enhances both the installation as well as the quality of the concrete slab. When SGC mat is in-stalled below the slab, you’re providing an airspace that intercepts radon--and other soil gases and vapors--before it seeps into the building through the slab. SGC mat also works well as a soil gas collector beneath crawlspace bar-rier due to its low-profile.
WHY & HOW IT WORKS
The matting is a one inch high by twelve inch wide matrix enveloped in a geotextile filter fabric. 90% of the geomatrix is airspace, which means soil gas has room to move to the col-lection point. This creates incredible pressure field extension for post con-struction system activation. The mat can support concrete without com-pressing, yet is extremely lightweight and easy to handle.
This system allows for radon to flow through the filter fabric and into the airspace. The airspace does not clog because the filter fabric retains the underlying gravel and soil. The natural airflow through the mat then channels the radon to the T riser to pipe connec-tion. From there, hazardous gas can be vented safely through the roof of the building.
Another key element of a soil gas col-lection system is attaching the 4” riser to the mat, such that airflow is not restricted at this critical juncture. The soil gas T riser is unique as it has three ports, two redundant mat entries and one PVC connection to outside air. This unique fitting connects all three sides without special connections or fittings. common duct tape and caulk does the trick. 2
ADVANTAGES
NO TRENCHINGNO BACKFILLNO VAPOR BARRIER*

It’s called SOIL gas mat for a reason, Place directly on soil or substrate.
Low-profile (1” thick) gas mat does not require trenching.
SAFETY DATA & PRODUCT DATA SHEETS AVAILABLE @ www.RADONMAT.com 3
INSTALLATION INSTRUCTIONS
1. Begin work on the sub grade (soil or gravel) after the final preparation and
before the concrete is poured. Start with T-Riser(s) and work out to ensure
smooth mat placement. Position the T-Riser(s) in appropriate location(s) and
nail down with a 12” steel nail (T Nail) through precut center hole.
2. Slide mat into flat openings on either end of T-riser with a portion of the fab-
ric around the outside. Tape the fabric to the outside of the T-Riser with duct
tape and staple mat to the ground with landscape staples to ensure soil contact
remains during pour stage.
3. Mat is typically laid out in a rectangular loop in the largest area with branch-
es or legs into smaller areas (FREE plan design at www.radonmat.com). There
is no need to trench the mat. Roll out the SGC mat, smooth it onto the ground.
To avoid wrinkles and buckling, work away from the risers, stapling to the
ground as you go. The mat should be stapled every three to four feet, in addi-
ton to corners, tee junctions & ends.
5. Corners are constructed by peeling back the filter fabric, cutting two ends
of the matrix at 45 degree angles and butting (or overlapping: no more than
1/2”) the matrix together. Pull the filter fabric back and tape into place. Staple
across the joint of the matrix and each leg of the corner. Use a minimum of
four staples at each corner-- two across the joint and one on each leg.
6. The tees for branches and legs are constructed by slitting the fabric of the
main loop at the location desired. Cut the fabric of the branch at the edges and
expose two inces of the matrix. Cut off the exposed matrix and but the ma-
trix of the branch (or overlap 1/2”)to the matrix of the main loop. Pull the flter
fabric of the branch back over the main loop and tape into place. Staple across
joint of the matrix with two staples and one each on the branch and main loop.
Use a minimum of four staples at each tee, two across the joint and one on
each loop and branch.
4
7. All openings in the fabric at joints, tee’s, and ends of branches should be
taped to keep out concrete.
8. Stub up a few feet of 4” schedule 40 PVC* from all T risers before pour (or
cover T riser with duct tape). Seal with polyurethene caulk and screws. This
ensures no concrete aggregate enters the riser during slab pour. Be sure to
label “CAUTION RADON REDUCTION SYSTEM” on all pipe. *(6” PVC may be
substituted--for large multifamily projects. Simply cut T riser 4” insert away to
reveal 6” insert).
9. When the building is ready for the vent pipe to be installed above the slab,
fit to pre-stubbed PVC with PVC straight connect. If PVC was not preset, cut
duct tape from riser and insert 4” PVC pipe now. Seal with polyurethene caulk
and secure with screws. Always label “CAUTION RADON REDUCTION SYSTEM”
to avoid confusion on site and for the building occupants.
NOTE: The openings in the riser are laid out at 180 degrees to accomodate
straight runs of mat. However, if the riser is to be placed in a corner, which is
not uncommon, the front of the T can be cut and the SGC mat inserted into
the new opening. The side of the T that is unused should be sealed with tape.
This creates a 90 degree T which will allow corner placement for the riser. Mat
should always enter the T riser from at least two directions and exhaust to pipe
vertically.
SAFETY DATA & PRODUCT DATA SHEETS AVAILABLE @ www.RADONMAT.com 5
MAKING CORNERS AND SPLICES
The mat should be routed around the inside perimeter of the foundation. This
will require occasional corner junctions. Furthermore, splices will have to be
made to join two lengths of mat together. Corners and splices are very easy to
make, and do not require any special fittings. Cut back the filter fabric to reveal
the core material. In the case of a splice, merely overlap the core by at least
one corrugation, replace the cloth, and tape it. Use two landscape staples to
hold the splice in place. In the case of a corner, peel back geotextile fabric and
slice the core of the two adjoining legs at 45 degree angles which mirror each
other; overlap the edges by one corrugation; return grey geotextile fabric, tape
and staple the corner together.
6
CONNECTING THE MAT TO THE
T RISER
A convenient T-riser with dual entry al-
lows for either end of the loop of mat
to be secured to the riser. Slide the mat
into each end of the riser and tape the
edge to prevent wet concrete from en-
tering. Cap the riser to ensure no con-
crete enters. T Riser caps can be pur-
chased in lieu of duct tape. A prestub of
PVC pipe can also serve the same pur-
pose. See steps 8-9 above.
***Due to high product demand, several T riser de-signs have been tested and approved for sale. Your
riser may look different than the one pictured here,
however its function is the same. Ensure you stub
up the PVC pipe and seal all openings with tape so
that concrete does not enter during the pour. Se-cure mat to the ground with staples so riser does
not float.
7
FLAT OUTLET
SGC to PVC transition
SIDE VIEW GOING THRU FOOTER/ INTERMEDIATE WALL
SOIL GAS MAT SOIL GAS MAT
PVC PIPE
FOOTER/INTERMEDIATE WALL/ TRENCH
Soil Gas Mat
TOP VIEW GOING OVER FOOTER/WALL/TRENCH
GRAVEL OR SOIL UNDER MAT
Soil Gas MatSoil Gas Mat 4” sch. 40 PVC PIPE
GRAVEL OR SOIL UNDER MAT
TRENCHTRENCHTRENCH & FOOTER CROSSINGS
IDEAL FOR LONG SPANS8
STEEL SLEEVE
24” (36”) x 1” x 12”
SIDE VIEW GOING THRU FOOTER/ INTERMEDIATE WALL
SOIL GAS MAT SOIL GAS MAT
PVC PIPE
FOOTER/INTERMEDIATE WALL/ TRENCH
Soil Gas Mat
TOP VIEW GOING OVER FOOTER/WALL/TRENCH
GRAVEL OR SOIL UNDER MAT
Soil Gas MatSoil Gas Mat
GRAVEL OR SOIL UNDER MAT
TRENCHTRENCHSTEEL SLEEVE
available in 24” or 36”
STEEL SLEEVE 1” thick
IDEAL SHORT TRENCHES 9
POURING CONCRETE
The filter fabric that comes sewn around the soil gas collector prevents the wet
concrete from entering the mat and reducing its air collection capacity. The
only precaution that needs to be taken is that the fabric is duct taped closed at
seams of splices and corner to sufficiently keep the uncured concrete from en-
tering.
The mat also needs to be secured to the soil with landscape staples to prevent
the concrete from lifting off the soil while it is being applied. Re-enforcing bars
and wire can be laid on top of the mat.
Note: the mat is strong enough (4,300 psf) to withstand concrete workers and
their wheel barrows.
10
radon risk
radon-induced lung cancer claims the lives of over 22,000 Americans each year
FACT: Radon is found at dangerous levels in all 50 US states. The EPA action level is 4.0 pci/L or higher
FACT: All US Homes have high radon potential, even those without basements
FACT: Radon is the leading cause of lung cancer among “never smokers”
FACT: Radon is a nobel gas and a natural part of the Uranium 238 breakdown chain
FACT: Breathing 6.2 pci/L is the equivalent radiation dosage of a THREE chest x-rays each week for your lungs
FACT: Radon is colorless, odorless, and invisible to the naked eye
FACT: Radon testing is cheap and you can do it yourself!

get the facts @
www.RadonReality.com
For anything and everything radon, VISIT US @ www.radonPDS.com
about us
Professional Discount Supply | Radon
Family-owned and operated since 1996. Situated on Colorado’s front range, PDS focuses on generating radon awareness through one-on-one technical support and trouble-shooting. Our products have been successfully installed in all 50 states and several foreign countries.

We’re always just a phone call away.
719-444-0646
1902 Aerotech Drive, Ste 110
Colorado Springs, CO 80916
Distribution opportunities available,
Please call for availability in your market