11037-07-060_Double Oaks_Atando Site_VIMP_Rev 2

#C-1269 Engineering #C-245 Geology

Vapor Intrusion Mitigation Plan –
Revision 2
Atando Site
Buildings 1002, 1004, 1005 & 1012

Double Oaks Brownfields Property
1386 Newland Avenue
Charlotte, North Carolina
Brownfields Project No. 11037-07-060

H&H Job No. BWR-013
June 13, 2023

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Vapor Intrusion Mitigation Plan – Rev. 2 Double Oaks Brownfields Property Atando Site 1386 Newland Avenue Charlotte, North Carolina Brownfields Project No. 11037-07-060 H&H Job No. BWR-013

Table of Contents
1.0 Introduction ................................................................................................................ 1
1.1 Background............................................................................................................2
1.2 Vapor Intrusion Evaluation ...................................................................................4
2.0 Design Basis ................................................................................................................ 8
2.1 Base Course Layer and Vapor Barrier ...................................................................9
2.2 Horizontal Collection Piping and Vertical Riser Piping .....................................10
2.3 Monitoring Points ................................................................................................12
2.4 General Installation Criteria ................................................................................13
3.0 Quality Assurance / Quality Control ...................................................................... 14
4.0 VIMS Effectiveness Testing .................................................................................... 15
4.1 Influence Testing .................................................................................................15
4.2 Pre-Occupancy Sub-Slab Soil Gas Sampling ......................................................15
4.3 Pre-Occupancy Indoor Air Sampling ..................................................................17
4.4 VIMS Effectiveness Results ................................................................................19
5.0 VIMS Effectiveness Monitoring ............................................................................. 20
6.0 Future Tenants & Building Uses ............................................................................ 21
7.0 Reporting .................................................................................................................. 22

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Figures

Figure 1 Site Location Map
Figure 2 Site Map
Attachments

Attachment A Vapor Intrusion Mitigation Design Drawings (dated June 13, 2023)
Attachment B Previous Assessment Data Summary & Site Map
Attachment C VIMS Component Specification Sheets
• Raven VaporBlock 20 (VBP-20) Product Sheet and Installation Instructions
• Drago-Wrap Vapor Intrusion Barrier Product Sheets and Installation Instructions
• Soil Gas Collector Mat Product Information & Installation Guide
• Slotted PVC Pipe Product Specification Sheets
• Ventilator Specification Sheets
• Monitoring Point Specification Sheet

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Vapor Intrusion Mitigation Plan – Rev. 2 Double Oaks Brownfields Property Atando Site 1386 Newland Avenue Charlotte, North Carolina Brownfields Project No. 11037-07-060 H&H Job No. BWR-013
1.0 Introduction

On behalf of NVR, Inc. (Prospective Developer or PD), Hart & Hickman, PC (H&H) has
prepared this Vapor Intrusion Mitigation Plan (VIMP) for the Double Oaks North Carolina
Department of Environmental Quality (DEQ) Brownfields Property (Brownfields Project No.
11037-07-060). The proposed redevelopment is known as the Atando Site and includes
construction of 96 residential townhomes across 17 separate buildings (Buildings 1001 through
1017). This VIMP is only applicable to proposed Buildings 1002, 1004, 1005, and 1012.

The Site consists of two parcels of vacant land (Parcel ID Nos.: 07707902 and 07707903) that
total approximately 5.37 acres. The larger parcel (Parcel No. 07707902) is approximately 5.26
acres in size and is part of a larger Brownfields property (referred to as the Double Oaks
Brownfields property) which is comprised of multiple parcels of contiguous and noncontiguous
parcels of land that total approximately 56 acres. The smaller parcel (Parcel No. 07707903) is
approximately 0.11-acre and is not part of the Double Oaks Brownfields property. A Site
location map is provided as Figure 1, and the Site and surrounding area are shown on Figure 2.

The subject Site consisted of agricultural land (likely a hayfield, row crops, and/or pastureland)
prior to development of Double Oaks, a lower-income housing project, in the late 1940s. In a
1938 aerial photograph, an area of disturbed soil is visible in the eastern portion of the Site
possibly associated with a soil borrow area. A pre-regulatory solid waste municipal landfill,
known as the Double Oaks Landfill, was historically operated by the City of Charlotte to the
west and southwest of the Brownfields property. The landfill area is 500 feet or more from the
Site. The Double Oaks Landfill operated between approximately the 1940s and early 1960s.
The portion of the Double Oaks development located on the subject Site consisted of twenty (20)
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multi-family residential structures, courtyard areas, and driveway areas. The Double Oaks
extended off-site to the west and north of the Site and the development existed until the
residential structures were demolished in the late 2000s. The Site has remained vacant since the
late 2000s and has been used to stockpile soil generated during redevelopment projects that have
occurred off-site on the larger Double Oaks Brownfields property.

Previous assessment activities conducted at the Site indicated the presence of volatile organic
compounds (VOCs), metals, and/or pesticides in soil, exterior soil gas, and sub-slab vapor. To
address potential environmental concerns associated with the Site, the PD elected to enter the
Site into the DEQ Brownfields Program and a Notice of Brownfields Property (Brownfields
Agreement) was issued on October 27, 2010, with an amendment to the Brownfields Agreement
recorded on December 15, 2016. The PD plans to redevelop the Site with 96 residential for-sale
townhomes. An Environmental Management Plan (EMP) dated May 17, 2022 describing Site
assessment activities and proposed development plans was submitted to and approved by DEQ.
Based on the Site information presented in Section 1.1 and in accordance with the requirements
of the DEQ-approved EMP, plus additional discussions with DEQ, a vapor intrusion mitigation
system (VIMS) will be installed at Building 1002, 1004, 1005, and Building 1012 of the
development as described herein this VIMP and as detailed in the VIMS design drawings
included as Attachment A and a Site Plan provided by NVR depicting the proposed buildings is
included in Attachment B.

1.1 Background

In November and December 2021, H&H performed Phase I and Phase II Environmental Site
Assessment (ESA) and Brownfields Assessment activities at the Site with subsequent soil
sampling occurring in December 2021, and again in January 2022 in the eastern portion of the
Site. An additional Brownfields soil gas assessment was performed in April 2023 as
summarized in the Additional Brownfields Assessment Report, dated June 12, 2023. Overall
assessment activities included the collection of soil and soil vapor samples for laboratory
analysis to evaluate the potential for impacts attributable to historical uses at the Brownfields
property and from nearby off-Site properties. Additionally, methane screening was conducted to
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assess any potential impacts from operations at the Double Oaks Landfill. Results of the
assessment activities are documented in Phase I and II ESA prepared by H&H and dated
December 22, 2021 (revised March 3, 2022). Tabular summaries of previous assessment data
and a figure depicting the locations of previous samples are provided in Attachment B. A brief
summary of the sampling activities and results pertinent to potential vapor intrusion for the Site
buildings is provided below. Refer to the EMP for a more comprehensive summary of Site
assessment results.

Groundwater Sampling
To date, no groundwater sampling has been conducted at the Site. Based on review of
topography, the groundwater table is anticipated to be approximately 20 feet to 25 feet below
ground surface (bgs) and the slab-on-grade of the proposed townhome buildings.

Soil Sampling
In November 2021, seven (7) shallow soil borings (CS-1 through CS-7) were advanced across
the Site to characterize soil prior to proposed redevelopment activities. Laboratory analytical
results of the soil samples collected indicated that VOCs were not detected at concentrations
above DEQ Residential Preliminary Soil Remediation Goals (PSRGs) in any of the shallow
samples collected. Chlorinated solvent compounds, including tetrachloroethylene (PCE) and
trichloroethylene (TCE), were not identified at concentrations above the laboratory method
detection limits in soil samples collected at the Site. Additionally, semi-volatile organic
compounds (SVOCs) were not detected at concentrations above laboratory detection limits in
any of the shallow samples collected. Several metals were detected above Residential PSRGs,
but metals are not typically associated with potential vapor intrusion. The metal mercury was
not detected above Residential PSRGs in any of the soil samples.

Soil Gas Sampling
In December 2021, four (4) exterior soil gas samples (VSP-1 through VSP-4) were collected at
the Site in areas representative of future building development. At the request of DEQ, 10
additional exterior soil gas samples (VSP-5 through VSP-14) were collected at the Site in other
areas representative of future building development in April 2023. Chloroform was detected in
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samples VSP-4 (13.2 micrograms per cubic meter (µg/m3)) and VSP-13 (12.1 µg/m3) at
concentrations above the DEQ DWM Residential Soil Gas Screening Level (SGSL) of 4.1 µg/m3
but below the Non-Residential SGSL. Naphthalene was detected in samples VSP-2 (6.28 µg/m3)
and VSP-4 (24.1 µg/m3) at concentrations above the DEQ DWM Residential Soil Gas Screening
Level (SGSL) of 2.8 µg/m3 but below the Non-Residential SGSL. Bromodichloromethane
(estimated value of 2.60 J µg/m3) was also detected in the VSP-4 soil gas sample at a
concentration above the Residential SGSL of 2.5 µg/m3, but below the Non-Residential SGSL.
The chlorinated solvents trichloroethylene (TCE) and tetrachloroethylene (PCE) were detected in
VSP-5 (estimated value of 0.531 J µg/m3, and 153 µg/m3, respectively) at concentrations above
the minimum detection limits but below the DEQ DWM Residential Soil Gas Screening Levels
(SGSL) of 14 µg/m3 and 280 µg/m3, respectively. Tetrachloroethylene (PCE) was also detected
at low levels below the DEQ DWM Residential SGSL in VSP-7 through VSP-11, VSP-13, and
VSP-14. Several other compounds were detected above the laboratory method detection limits,
but below their respective Residential SGSLs. The soil gas sample result tables are summarized
in Attachment B.

Methane Screening
Methane screening was conducted at each of the soil gas sample points sampled in December
2021 (VSP-1 through VSP-4). Methane was not detected in any of the samples. Therefore,
methane is not present at unacceptable levels at the Site and does not appear to pose a potential
methane gas intrusion risk to future occupants of future Site buildings. Landfill gas
measurements are summarized in Attachment B.

1.2 Vapor Intrusion Evaluation
To further evaluate cumulative exposure risks for the soil gas to indoor air vapor intrusion
pathway for the proposed residential development, H&H utilized the DEQ risk calculator to
calculate the lifetime incremental carcinogenic risk (LICR) and hazard index (HI) under
hypothetical worst-case residential and non-residential use scenarios for the soil gas points
sampled in December 2021 (VSP-1 through VSP-4) and the soil gas points sampled in April
2023 (VSP-5 through VSP-14). The hypothetical worst-case calculations utilized the highest
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concentration for any compound detected in any soil gas sample within the specific sampling
event. A risk calculation was run separately for VSP-5, which had the J-flag detection of TCE,
from the remaining soil gas samples collected during the April 2023 sampling event (VSP-6
through VSP-14). Typically, vapor intrusion mitigation for a building is not warranted unless the
LICR is 1 x 10-4 or greater for potential carcinogenic risks and/or the cumulative HI is 1.0 or
greater for potential non-carcinogenic risks. The risk calculator results are summarized in the
table below.

Risk calculator results for the soil gas to indoor air vapor intrusion pathways do not exceed
acceptable risk levels for any of the soil gas sample groupings. Copies of the DEQ risk
calculator output sheets for the vapor intrusion assessment are provided in Attachment B.

As indicated in the DEQ-approved EMP, in order to minimize the potential for structural vapor
intrusion into the proposed Site buildings, the PD plans to voluntarily install a passive VIMS
during construction of the proposed Buildings 1002 and 1012. Further, upon discussions with
DEQ following the additional assessment conducted in April 2023, the PD plans to install a
passive VIMS during construction of the proposed Buildings 1004 and 1005 due to the presence
of the chlorinated solvent compound detections in VSP-5. The mitigation action is being
conducted in an abundance of caution despite the findings from risk calculations that do not
demonstrate an unacceptable risk to future residents or workers. Note, in addition to the passive
VIMS in Buildings 1002, 1004, 1005, and 1012, the EMP indicates that the PD will also install a
vapor barrier below the slab of the 13 remaining buildings (Building 1001, 1003, 1006 through
Assessment Area Land Use Scenario Calculated Cumulative LICR Calculated Cumulative HI
Acceptable Risk Levels? Worst-Case - (VSP-1 through VSP-4)
Residential 1.3 x 10-5 0.28 Yes
Non-Residential 1.0 x 10-6 0.022 Yes
VSP-5 Residential 9.1 x 10-7 0.13 Yes
Worse-Case - (VSP-6 through VSP-14) Residential 4.8 x 10-6 0.080 Yes
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1011, and 1013 through 1017) at the Site as an additional precautionary measure. Further details
regarding the currently proposed vapor barrier installation for these buildings are included in
Section 2.1.
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Engineer’s Certification – Buildings 1002, 1004, 1005, and 1012
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 standard vapor intrusion mitigation provisions included
Brownfields Agreement. Per the North Carolina Brownfields Property Reuse Act 130A-310.32,
a prospective developer, with the assistance of H&H for this project, is to provide NCDEQ with
“information necessary to demonstrate that as a result of the implementation of the brownfields
agreement, the brownfields property will be suitable for the uses specified in the agreement
while fully protecting public health and the environment instead of being remediated to
unrestricted use standards.” It is in the context of these risk-based concepts that the H&H
professional engineer makes the following statement:

The vapor intrusion mitigation system detailed herein is designed to mitigate intrusion of
subsurface vapors into the subject buildings 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]

Trinh DeSa NC PE #044470 Hart & Hickman, PC (#C-1269)
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2.0 Design Basis
The VIMS design drawings for the Atando Site (also known as Atando Townhomes)
development are included in Attachment A. The following VIMS design sheets will be used to
guide construction of the VIMS:
• Sheets VM-1, VM-2, and VM-3 show the VIMS plan view layout for Buildings 1002,
1004, 1005, and 1012;
• Sheets VM-A, VM-B, and VM-C include section details and specifications.

To reduce the potential for structural vapor intrusion, the VIMS in Buildings 1002, 1004, 1005,
and 1012 will operate as passive sub-slab venting systems that include a network of horizontal
sub-slab and vertical above-slab riser piping that will discharge collected vapors above the
building roofline.

The proposed development plan includes four (4) residential townhome units in Building 1002
(Units 6 through 9), six (6) residential townhome units in Building 1004 (Units 16 through 21),
five (5) residential townhome units in Building 1005 (Units 22 through 26), and six (6)
residential townhome units in Building 1012 (Units 63 through 68). The proposed townhome
layout is known as Clarendon with a mirrored option of each floor layout available to future
owners of the townhomes. Each townhome unit will include a stairwell, garage, and/or living
spaces located on the ground floor of the structure. The ground floor for each townhome unit is
approximately 640 square feet. All of the units are proposed to contain three floors and a flat
roof with a shallow attic space (roof heel). The structures will be built with a concrete slab on-
grade foundation with concrete footings and concrete or block walls below load bearing stud
walls, or they may contain slab-on-grade construction with monolithic slab and footer concrete
pours. The final foundation plans will be included in the as-built figures.

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2.1 Base Course Layer and Vapor Barrier

The VIMS includes placement of a minimum 4-inch base course stone (gravel) layer consisting
of high permeability stone (washed #57 stone, or similar high permeability stone approved by the
design engineer) below the concrete slab of each building. A vapor barrier (vapor liner) will be
installed above the base course stone layer and directly beneath the slab and below footers. A
horizontal collection piping network will be installed within the base course stone layer below
the ground floor slabs prior to placement of the vapor barrier. The horizontal vapor collection
piping is discussed further in Section 2.2. below. The piping layouts are shown on the VIMS
design drawings (Attachment A).

The vapor barrier will consist of a VOC-rated vapor barrier, either the 20-mil Vaporblock® Plus
20 (VBP20) manufactured by Raven Industries (Raven) or the 20-mil Drago® Wrap Vapor
Intrusion Barrier (Drago Wrap) manufactured by Stego® Industries (Stego). The vapor barriers
will be installed per manufacturer installation instructions. An equivalent vapor barrier product
may be used pending approval by the design engineer and DEQ. Technical specifications for
each vapor barrier product listed above are included in Attachment C.

The vapor barrier will be installed over the base course stone layer or applicable vertical sub-
grade walls and footers to cover the areas shown on the design sheets. Each vapor barrier
manufacturer recommends select sealing agents (mastics, tapes, etc.) for their vapor barrier
product. In accordance with manufacturer installation instructions, alternative vapor barrier
products that are not approved by the manufacturers for sealing shall not be used, unless
approved by the design engineer and specific manufacturer.

The exterior edges of the vapor barrier shall be attached and sealed to building footings and
subsurface concrete features utilizing the double-side tape or sealants specified in the
manufacturer instructions. Seams within the building envelope shall have a minimum of 12-
inches of overlap and shall be sealed with the tape specified in the manufacturer instructions.
Penetrations shall be sealed using a boot-style method or as otherwise approved by the
manufacturer instructions. If the vapor barrier is damaged, torn, or punctured during installation,
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the vapor barrier must be patched with tapes or an overlain patch will be installed by overlaying
a piece of vapor barrier 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 design
engineer certifying the VIMP, an alternative sealant product specified by the vapor barrier
manufacturer should be used, such as Raven Pour-N-Seal™ or Drago Sealant™, or similar vapor
barrier manufacturer sealing products. If used, the location of these products will be noted in the
field logs. Following successful installation of the vapor barrier, the finished concrete slab will
be placed directly on top of the sealed vapor barrier to further seal the seams and penetrations.
2.2 Horizontal Collection Piping and Vertical Riser Piping
NVR has indicated that the townhomes include fee-simple property ownership contracts.
Therefore, interconnected pipes between townhome units are not allowed by the contracts. Thus,
each townhome unit in Buildings 1002, 1004, 1005, and 1012 will contain its own VIMS with
sub-slab vent piping, one riser with exhaust ventilator, and one monitoring point. Based on the
small size of each unit footprint (approximately 640 sq ft), one exhaust riser pipe with a
stationary ventilator per unit is expected to sufficiently provide the necessary vapor extraction
from the sub-slab annular space.

Passive sub-slab venting will be accomplished using horizontal soil-gas collector mats, slotted
pipe, or perforated pipe, which will collect vapor from beneath ground floor slab areas and
discharge the vapors above the building roofline. If vent pipe is used, below slab piping will
consist of 3-inch diameter Schedule 40 (SCH 40) PVC piping and fittings. Solid sections of
VIMS piping shall maintain a minimum 1% slope toward slotted sections to drain potential
condensation water. Product specifications for the sub-slab collection piping are provided in
Attachment C.

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The riser pipes will extend from the slab through a chase on the second and third levels. There is
a shallow attic space (roof heel) located above the third level that is approximately 3-foot-high.
The riser pipe will extend within this attic space to within approximately 3 ft of the attic hatch or
access door then will terminate above the building roof. The attic hatch is proposed to be in the
ceiling of the 3rd floor master bedroom closet.

The passive sub-slab vapor extraction system will further be enhanced with stationary
ventilators, which are exhaust devices with no moving parts that function to enhance the stack
effect and promote air exhaust from the VIMS piping when wind is blowing. During times of no
wind, the stationary ventilator continues to be open to the atmosphere to allow for vapors to
discharge from the riser pipe due to the stack effect. Active Ventilation Products, Inc. AV-3-
PVC Aura ventilators or Empire Eveco 4-inch (EV-04G) ventilators (or engineer approved
alternative) will be installed on the discharge end of the 3-inch SCH 40 PVC vertical riser
piping. Each individual townhome unit will contain an individual riser and ventilator. The
ventilators will generally be located on areas of the roof that receive effects from wind under
normal weather conditions. However, as the ventilators are intended to enhance the passive
VIMS and aren’t required for proper function of the system, some ventilators may be positioned
in areas that receive intermittent effects from wind based on the building layout and other
building components. The requirements for the discharge location based on distances to building
materials, operable openings, air intakes, etc. will be followed as indicated in the design
drawings and applicable building code. Product specification sheets for the proposed ventilators
are included in Attachment C.

To aid in identification of the vapor mitigation piping, the piping will be labeled by the Site
contractors with stickers adhered to a smooth surface or permanent labels which read, “Vapor
Mitigation – Contact HOA”, or similar language, on accessible piping at intervals of no greater
than 10-linear feet. Similar labels will also be affixed near the exhaust discharge within the attic
space. VIMS labeling will be inspected by H&H prior to covering risers or building occupancy.

Exhaust discharge locations must be a minimum of 1 ft above the roofline and a minimum 10 ft
from an operable opening (e.g., door or window) or air intake into the building. Note that the
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exhaust locations on the roof depicted in the VIMS design may be repositioned within the
requirements specified above and pending approval by the design engineer certifying the VIMP.
Electrical junction boxes (120VAC, min 15-amp required) will be installed within approximately
3 ft of the riser and attic hatch should connection of an electrical (active) fan be warranted in the
future. If warranted, the fan and an associated vacuum alarm are proposed to be installed within
the attic/roof heel with power provided by the proposed electrical junction box. The type of fan
would likely be a low-wattage radon mitigation style fan, such as the RadonAway RP-145, or
similar. In the event an electric fan is recommended or warranted, a plan with specific details
and related post-installation testing and inspection activities for the active system will be
provided to DEQ for review and approval prior to the implementation of the active system.

2.3 Monitoring Points

Monitoring points constructed with 2-inch diameter SCH 40 PVC 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 soil gas samples for laboratory analysis. The
monitoring point locations are shown on the VIMS design drawings (Attachment A).

In general, monitoring points are placed at remotely distant locations from vertical riser piping
locations and in representative areas of the ground floor enclosed areas with a minimum of one
monitoring point per townhome unit. To limit disturbance to residents or occupants during
future monitoring events, the monitoring point access ports will be in exterior access panels.
There are two different monitoring point orientation options, Option 1 and Option 2, indicated on
Sheet VM-C in Attachment A, to provide representative coverage across the building slab while
maintaining options to allow the best access to the monitoring points based on the final layout of
the townhome mechanical equipment, such as heating, ventilation, and air conditioning (HVAC)
condensers. Product specifications for the proposed monitoring point components are provided
in Attachment C.

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,
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pending approval by the design engineer certifying the VIMP. DEQ will be notified in advance
for approval if monitoring points are notably relocated in relation to the approved locations
specified in the VIMP. The specific type and location of the installed monitoring points will be
documented in as-built drawings provided in a VIMS installation completion report.

2.4 General Installation Criteria

The VIMS installed components (e.g., vapor barrier, piping, monitoring points, etc.) 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
VIMS components. For example, the monitoring points and riser duct piping should be capped
with a removable slip-cap or cover immediately following installation to prevent water and/or
debris from entering the VIMS, and vapor barrier shall be protected from punctures and tears
during site-work.

For each phase of construction (above and below slab), construction contractors and sub-
contractors will be instructed to use “low or no VOC” products and materials, when possible.
Furthermore, the construction contractors will be instructed to not use products containing the
compounds PCE or TCE. 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 will be included in the VIMS installation completion report.

Utility Trench Dams
Note, for townhome construction, each individual utility trench is expected to be backfilled with
Site soils and not transmissive backfill layers like coarse stone or sand. In addition, current
assessment data indicates acceptable risk levels are present on the Site and no known source of
contamination is present at the Site. As such, utility trench dams that sometimes can be used to
prevent vapor transfer along a utility trench are not warranted for this development.

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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 VIMS installation in Buildings 1002, 1004, 1005, and 1012. The
components that require inspection are outlined below:
(1) Inspection of the base course stone layer, sub-slab piping layout, and monitoring points
prior to installing the vapor barrier;
(2) Inspection of the vapor barrier below slab areas prior to pouring concrete in the footers or
slabs;
(3) Inspection of above-grade vertical riser piping; and
(4) Inspection of riser pipe connections, pipe exhaust, and ventilators.

Additional inspections will be conducted if the system(s) are activated to verify electric fans (if
installed) are functioning properly. Each inspection will be performed by, or under direction of,
the design engineer, or a North Carolina licensed Professional Engineer (NC PE) 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. The
contractor shall notify the engineer certifying the VIMP, or his/her designee, with a minimum
48-hour notice prior to a planned inspection, and H&H will provide a subsequent 48-hour notice
to DEQ for the pending inspection.

Note, in accordance with the DEQ-approved EMP, one of the proposed vapor barriers (see
Section 2.1), will also be installed in the remaining Site buildings (Buildings 1001, 1003, 1006
through 1011, and 1013 through 1017) that will not include construction of the passive VIMS.
For QA/QC purposes, the installation of the vapor barrier in the remaining buildings will also be
inspected by a NC PE, or designee. The vapor barrier inspections for these buildings without the
passive VIMS will be documented and reported to DEQ in the annual redevelopment report due
to DEQ in January of each calendar year. Note, the buildings listed above will include
installation of vapor barrier below the slabs and interior footers of each building similar to the
vapor barrier installation details depicted in the design drawings for Buildings 1002, 1004, 1005,
and 1012 (Attachment A).
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4.0 VIMS Effectiveness Testing
4.1 Influence Testing

Post-installation (pre-occupancy) influence testing will be conducted in Buildings 1002, 1004,
1005, and 1012 to evaluate vacuum communication across the slab and confirm sufficient
depressurization can be obtained should electric fans be needed in the future. Influence testing
will be conducted for each building following installation of the horizontal collection piping,
placement of the vapor barrier, and completion of concrete slab pours.

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 sub-slab vacuum levels will be measured at each
monitoring point location. While any measurable sub-slab vacuum level can indicate there is
influence below the slab, a pressure differential below the slab of at least 4 pascals
(approximately 0.016 inches of water column [in-WC]) at remote distances from riser location in
each VIMS treatment area may be considered as sufficient evidence of adequate sub-slab VIMS
influence per evaluation by the design engineer. Vacuum influence testing results will be
included in 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 a VIMS installation completion report.

4.2 Pre-Occupancy Sub-Slab Soil Gas Sampling

Following VIMS installation, but prior to occupancy of the building(s), sub-slab soil gas samples
will be collected from select monitoring points to further evaluate the potential for structural
vapor intrusion. The sub-slab soil gas samples will be collected from locations generally
representative of the building. Sub-slab soil gas sample analytical results will be used to
evaluate potential risks to future occupants of the building. Two sub-slab soil gas samples are
proposed to be collected from each building for Buildings 1002 and 1005, which contain four
and five proposed units, respectively. Three sub-slab soil gas samples are proposed to be
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collected from each building for Buildings 1004 and 1012, which each contain seven proposed
units. The proposed units for the sub-slab samples are depicted on Sheet VM-C.

One duplicate sub-slab soil gas sample will be collected during each sampling event for quality
assurance/quality control (QA/QC) purposes. The duplicate will be collected from one of the
measuring points using a laboratory supplied stainless-steel sample “T” fitting which allows two
samples to be collected simultaneously from a single measuring point. The vacuum measuring
points will be sampled by securing an expandable plug with sample port (i.e., an Ex-Cap) into
the vacuum measuring point to create an air-tight seal. The sub-slab soil gas sample will then be
collected in general accordance with the DEQ DWM VI Guidance.

Prior to sample collection, leak tests will be performed at each sub-slab soil gas sample location.
A shroud will be constructed around the monitoring point and sub-slab soil gas sampling train
and sample canister. Air within the shroud will be flooded with helium gas, and helium
concentrations will be measured and maintained using a calibrated helium gas detector. With
helium concentrations within the shroud maintained, sub-slab soil gas 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 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 soil gas samples will be collected over an approximate 10-minute period using
laboratory supplied batch-certified 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 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.

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The samples will be submitted to a qualified laboratory under standard chain of custody
protocols for analysis of full-list VOCs by EPA Method TO-15, including naphthalene. The
analytical laboratory will be instructed to report vacuum measurements as received at the lab and
J-flag concentrations (concentrations measured between the laboratory method detection limit
and laboratory reporting limit) 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 to the extent possible, the DEQ DWM Residential SGSLs.

4.3 Pre-Occupancy Indoor Air Sampling

Pre-occupancy indoor air sampling is not expected to be warranted, unless the sub-slab vapor
data indicates unacceptable risk levels are present below the slabs of the buildings (see Section
4.4). In this case, a plan for potential indoor air sampling or collection of additional sub-slab
vapor sampling will be submitted to DEQ for review and approval prior to conducting the
additional sampling event. General procedures for conducting indoor air sampling are
summarized below for reference purposes.

The buildings are intended to be occupied shortly following completion and initialization of the
HVAC system. Therefore, indoor air sampling events (if warranted), will be conducted
following construction and installation of the VIMS and fully enclosed building including a
minimum of two weeks following completion of the risers and ventilators, but may be conducted
prior to initialization of the HVAC system(s). The DEQ Vapor Intrusion Guidance, dated March
2018, indicates “higher indoor air concentrations might be expected when a building is sealed up
and the HVAC is not running”, and “worse case conditions may also be considered when the
building is closed up and the HVAC system is not running.” Furthermore, HVAC equipment is
typically not able to be activated until approximately a few weeks prior to closing due to the
timing of the Mecklenburg County approval for installation of the gas and electric meters. Thus,
conducting indoor air sampling with the building enclosed, but prior to HVAC operation, may
allow for a more conservative indoor air sampling approach and will allow for time to conduct
the pre-occupancy sampling and reporting as required in this Plan prior to closing. In addition,
HVAC equipment isn’t operational until finishing activities including installation of flooring,
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cabinets, sealants, paints, industrial cleaning, etc. are being conducted. Off-gassing of VOCs
from these building finishing materials and products can impact the indoor air concentrations and
make it more difficult to evaluate the potential for vapor intrusion. Thus, sampling ahead of
HVAC operating and finishing activities is proposed.

The indoor air samples and background air sample (if warranted) 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 approximate 24-hour period. A laboratory supplied 3-foot
sampling cane, or similar methods, will be connected to the 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 each 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 protocols to a
qualified laboratory for analysis of select VOCs by EPA Method TO-15. The select compound
list will be based upon the VOC compounds that are part of the Method TO-15 list detected
above laboratory MDLs in any site media (groundwater, soil, and soil-gas) during previous
assessment activities and pre-occupancy sub-slab samples. 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 MDLs or to the extent possible, the DEQ DWM Residential Vapor Intrusion Indoor
Air Screening Levels (IASLs). In addition, an Indoor Air Building Survey form (Appendix C of
the DWM VI Guidance) will be completed for each sampling event.
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New construction materials such as treated lumber, paint, caulk, carpet, adhesives, sealants 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 instructed to provide SDSs for materials used during construction which will
be submitted to DEQ, if needed to further evaluate sub-slab soil vapor and indoor air data.

4.4 VIMS Effectiveness Results

The results and analysis of the sub-slab soil vapor and indoor air sampling (if warranted) will be
submitted to DEQ with the VIMS Installation Completion Report (discussed in Section 7.0).
After receipt of the sub-slab soil vapor 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 use scenario.

H&H will consider the VIMS effective if the calculated cumulative risks are within acceptable
levels in accordance with DEQ’s Risk Calculator results. The DEQ acceptable risk levels (see
Section 1.2) include:

• Cumulative carcinogenic risks less than 1 x 10-4; and
• Non-carcinogenic risk levels below a HI of 1.0.

In the event that calculated cumulative risks are greater than the acceptable risks listed above,
then an evaluation of potential interference of compounds from building material off-gassing for
will be conducted and the data will be presented to DEQ. If it is determined that the sub-slab
vapor concentrations are from Site contaminants and could lead to unacceptable vapor intrusion
risks to the occupants of the building, confirmation sub-slab soil vapor and indoor air samples
may be collected from the area(s) of concern per discussion with DEQ. Further, in this case, an
evaluation to potentially convert the system to an active VIMS or other enhancements to the
system will be conducted. If warranted, modifications to the VIMS will be presented to DEQ for
review and approval prior to implementation.
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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 solid risers that discharge sub-slab vapors above the roofline. The passive
system will be enhanced with stationary ventilators to promote air exhaust from the sub-slab. As
such, differential pressure monitoring is not anticipated. If the VIMS is converted to an active
system with electric fans based on 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. The specific electric fans to be used
will be selected by the design engineer based on the results of the influence testing discussed in
Section 4.0.

As the passive VIMS is being installed in Buildings 1002, 1004, 1005, and 1012 out of an
abundance of caution, and in accordance with the DEQ-approved EMP, post-occupancy VIMS
effectiveness monitoring is not expected to be warranted. An evaluation of the pre-occupancy
effectiveness testing data will be provided in the VIMS installation report (see Section 7.0) with
recommendations for any potential post-occupancy effectiveness testing for DEQ review and
concurrence.

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6.0 Future Tenants & Building Uses
The homeowner’s association (HOA) or property management group will be responsible for the
continued operation of the VIMS in accordance with the VIMP. The future use of the proposed
Site buildings is for individual ownership of the townhome units. After occupancy in the
townhomes, the townhome community HOA will be required to maintain the VIMS in Buildings
1002, 1004, 1005, and 1012. If vapor mitigation components are damaged or need to be altered
for building renovations, the homeowners will be instructed to contact the HOA. The HOA shall
contact a North Carolina PE to oversee or inspect the activities, and a report will be submitted to
DEQ detailing the repairs or alterations.
In order to provide guidance for post-construction maintenance of the VIMS, it is recommended
for the HOA or property management group to contract a NC PE to prepare an operations and
maintenance (O&M) plan to be submitted to DEQ upon construction of Buildings 1002, 1004,
1005, and 1012. The O&M plan should include the procedures to be followed during required
annual third-party inspections of the VIMS. Inspections should include visual observations of
the exterior building slabs and perimeter/footer edges for cracks or damage, and inspections of
the stationary ventilators for damage or rust. The inspections should be documented in a system
certification letter signed and sealed by a NC PE to be submitted with the annual LURU.

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7.0 Reporting
A VIMS Installation Completion Report (sealed by a NC PE) documenting installation activities
associated with the VIMS for Buildings 1002, 1004, 1005, and 1012 will be submitted to DEQ
following confirmation that the mitigation systems are installed and effectively mitigating
potential vapor intrusion risks to building occupants. The report 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 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. Based on the construction phasing, it is anticipated that a separate report
will be submitted for Buildings 1002, 1004, 1005, and 1012. The report for each building will be
submitted to DEQ prior to occupancy of the subject building and per standard Brownfields
Program requirements, no occupancy of the building should occur without prior written approval
of DEQ.

For the buildings (Building 1001, 1003, 1006 through 1011, and 1013 through 1017) without a
proposed VIMS, the vapor barrier inspection details will be documented in the annual
redevelopment report(s) due to DEQ in January of each calendar year with a NC PE seal.
Further, for these buildings, a notification will be provided to DEQ prior to occupancy of each
building indicating that the vapor barrier installation was completed and inspected. Note, as
indicated in previous sections, if results of the proposed additional assessment indicate additional
vapor intrusion mitigation measures may be warranted for these buildings, the details and plans
for the additional measures along with any associated reporting and requirements for DEQ
approval will be provided in a separate submittal.
Copyright:© 2013 National Geographic Society, i-cubed
SITE LOCATION MAP
ATANDO - DOUBLE OAKS PROPERTY 1302 & 1340 NEWLAND AVENUE
CHARLOTTE, NORTH CAROLINA
DATE: 11-16-21
JOB NO: BWR-013
REVISION NO: 0
FIGURE NO: 1
2923 South Tryon Street - Suite 100Charlotte, North Carolina 28203704-586-0007 (p) 704-586-0373 (f)License # C-1269 / # C-245 Geology
TITLE
PROJECT
0 2,000 4,000
SCALE IN FEET
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U.S.G.S. QUADRANGLE MAP
DERITA, NORTH CAROLINA 2013CHARLOTTE EAST, NORTH CAROLINA 2013
QUADRANGLE7.5 MINUTE SERIES (TOPOGRAPHIC)
LEGEND
SITE PROPERTY BOUNDARY
PARCEL BOUNDARY
SURFACE WATER FEATURE
PROPOSED BUILDING FOOTPRINT
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NOTES:
1.AERIAL IMAGERY AND PARCEL DATA OBTAINED
FROM MECKLENBURG COUNTY GIS (2020).
2.DEVELOPMENT PLAN OBTAINED FROM NVR, INC.
DEVELOPMENT LAYOUT IS APPROXIMATE.
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REVISION NO. 0
JOB NO. NVR-019
DATE: 6-12-23
FIGURE NO. 2
ATANDO-DOUBLE OAKS PROPERTY
NEWLAND ROAD
CHARLOTTE, NORTH CAROLINA
SITE MAP
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
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Attachment A

Vapor Intrusion Mitigation Design Drawings (dated June 13, 2023)
Sheets VM-1, VM-2, VM-3, VM-A, VM-B, and VM-C
RYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONAL APPROVAL / SEAL
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
VM-1
H&H NO. NVR.019
FIRST FLOOR PLAN
GIT OPTION
BUILDINGS 1002, 1004,
1005, & 1012
JUNE 13, 2023
8
VM-B
4
VM-B
5
VM-B2
VM-B
5
VM-B
6
VM-B
9
VM-B
1
VM-B
LEGEND
EXTENT OF VAPOR BARRIER (SEE SPECIFICATION #2 ON
SHEET VM-1A)
SUB-SLAB COLLECTOR PIPE (SEE SPECIFICATION #3)
VERTICAL RISER (3" SCH 40 PVC) AND EXHAUST LOCATION
VACUUM MEASURING POINT (2" SCH 40 PVC WITH OPEN
END)
THICKENED SLAB AT LOAD BEARING WALL (MAY NOT BE
PRESENT IN ALL LOCATIONS)
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NOTES:
1.LAYOUTS FOR GIT OPTION ARE SHOWN. SEE SHEETS VM-2 FOR LAYOUTS OF GIH UNITS. GROUND
FLOOR LEVEL OF EACH BUILDING SHOWN. REFER TO STRUCTURAL AND ARCHITECTURAL
DRAWINGS FOR FINAL BUILDING LAYOUT. FINAL UNIT LAYOUT MAY INCLUDE MIRRORED OPTIONS.
2.ONE VACUUM MEASURING POINT SHALL BE INSTALLED PER UNIT. THE MEASURING POINT SHALL
BE INSTALLED BELOW THE UNIT OPPOSITE FROM THE GARAGE DOOR FOR INTERIOR UNITS AND ON
THE GARAGE SIDE OF END UNITS.
3.INSTALL ONE MONITORING POINT PER TOWNHOME UNIT. POSITION INTAKE OF MONITORING
POINTS A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN SLAB, OR AS OTHERWISE
APPROVED BY THE DESIGN ENGINEER.
4.POSITION SUB-SLAB COLLECTION PIPE A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN
SLAB, OR AS OTHERWISE APPROVED BY THE DESIGN ENGINEER.
5.REFER TO THE SPECIFICATIONS SHEET AND SECTION DETAILS ON SHEETS VM-A AND VM-B.
6.EACH UNIT FLOOR IS APPROXIMATELY 640 SQ FT (16 FT X 40 FT).
MECHANICAL
ROOM
45-DEGREE ELBOW OR
FITTINGS AS NEEDED
8
VM-B
4
VM-B
5
VM-B
2
VM-B
5
VM-B
6
VM-B
1
VM-B
MECHANICAL
ROOM
9
VM-B
3
VM-B
3
VM-B
OPTIONAL MONITORING POINT
LOCATION FOR INTERIOR UNIT,
SEE SHEET VM-C
OPTIONAL MONITORING POINT
LOCATION FOR END UNIT, SEE
SHEET VM-C
06/13/23
REVISION 2
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RYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
VM-2
H&H NO. NVR.019
FIRST FLOOR PLAN
GIH OPTION
BUILDINGS 1002,
1004, 1005, & 1012
PROFESSIONAL APPROVAL / SEAL
JUNE 13, 2023
8
VM-B
4
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2
VM-B
5
VM-B
6
VM-B
9
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LEGEND
EXTENT OF VAPOR BARRIER (SEE SPECIFICATION #2 ON
SHEET VM-1A)
SUB-SLAB COLLECTOR PIPE (SEE SPECIFICATION #3)
VERTICAL RISER (3" SCH 40 PVC) AND EXHAUST LOCATION
VACUUM MEASURING POINT (2" SCH 40 PVC WITH OPEN
END)
THICKENED SLAB AT LOAD BEARING WALL (MAY NOT BE
PRESENT IN ALL LOCATIONS)
NOTES:
1.LAYOUTS FOR GIT OPTION ARE SHOWN. SEE SHEETS VM-2 FOR LAYOUTS OF GIH UNITS. GROUND
FLOOR LEVEL OF EACH BUILDING SHOWN. REFER TO STRUCTURAL AND ARCHITECTURAL DRAWINGS
FOR FINAL BUILDING LAYOUT. FINAL BUILDING LAYOUT MAY INCLUDE MIRRORED OPTIONS.
2.ONE MONITORING POINT SHALL BE INSTALLED PER TOWNHOME UNIT. THE MONITORING POINT
SHALL BE INSTALLED BELOW THE UNIT OPPOSITE FROM THE GARAGE DOOR FOR INTERIOR UNITS
AND ON THE GARAGE SIDE OF END UNITS.
3.POSITION INTAKE OF VACUUM MEASURING POINTS A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED
DOWN SLAB, OR AS OTHERWISE APPROVED BY THE DESIGN ENGINEER.
4.POSITION SUB-SLAB COLLECTION PIPE A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN
SLAB, OR AS OTHERWISE APPROVED BY THE DESIGN ENGINEER.
5.REFER TO THE SPECIFICATIONS SHEET AND SECTION DETAILS ON SHEETS VM-A AND VM-B.
6.EACH UNIT FLOOR IS APPROXIMATELY 640 SQ FT (16 FT X 40 FT).
MECHANICAL
ROOM, TYP.
4
VM-B
4
VM-B
2
VM-B 2
VM-B
8
VM-B
8
VM-B
9
VM-B
9
VM-B
3
VM-B
3
VM-B
3
VM-B
6
VM-B
6
VM-B
7
VM-B
7
VM-B
7
VM-B
OPTIONAL MONITORING POINT
LOCATION FOR END UNIT, SEE
SHEET VM-C
OPTIONAL MONITORING POINT
LOCATION FOR INTERIOR UNIT,
SEE SHEET VM-C
OPTIONAL MONITORING POINT
LOCATION FOR INTERIOR UNIT,
SEE SHEET VM-C
06/13/23
REVISION 2
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RYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
VM-3
LEGEND
3" DIA SCH 40 PVC VERTICAL RISER - PRIOR LEVEL LOCATION
3" DIA SCH 40 PVC VERTICAL RISER - ROOF LEVEL LOCATION
3" SOLID SCH 40 PVC RISER PIPE - THIRD FLOOR CEILING
NOTES:
1.EACH BUILDING LAYOUT HAS A SIMILAR THIRD FLOOR LAYOUT AS DEPICTED. REFER TO
STRUCTURAL AND ARCHITECTURAL DRAWINGS FOR FINAL BUILDING LAYOUT. FINAL
LAYOUTS MAY INCLUDE A MIRRORED OPTION.
2.REFER TO THE SPECIFICATIONS SHEET AND SECTION DETAILS ON SHEETS VM-A AND
VM-B.
3.EACH UNIT IS APPROXIMATELY 16-FT X 40-FT.
H&H NO. NVR.019
3RD FLOOR PLAN
ALL LAYOUTS
BUILDINGS 1002,
1004, 1005, & 1012
PROFESSIONAL APPROVAL / SEAL
JUNE 13, 2023
10
VM-B
ATTIC HATCH
(ACCESS DOOR)
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FIRE STOP, FLASHING, OR OTHER
SEALANT SHALL BE APPLIED
AROUND PIPE CONDUIT THROUGH
CHASE
PIPE LOCATED IN
ATTIC SPACE
06/13/23
REVISION 2
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RYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
VM-A
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H&H NO. NVR.019
SPECIFICATIONS
BUILDINGS 1002,
1004, 1005, & 1012
PROFESSIONAL APPROVAL / SEAL
JUNE 13, 2023
VAPOR INTRUSION MITIGATION SYSTEM (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 BARRIER (LINER) SHALL BE VAPORBLOCK PLUS 20 (VBP20) 20-MIL VAPOR
BARRIER MANUFACTURED BY RAVEN INDUSTRIES (RAVEN) OR DRAGO-WRAP 20-MIL
VAPOR INTRUSION BARRIER MANUFACTURED BY STEGO. EQUIVALENT VAPOR BARRIERS
MAY BE ABLE TO BE USED, PENDING APPROVAL BY THE DESIGN ENGINEER.
THE VAPOR BARRIER SHALL BE INSTALLED AS SPECIFIED HEREIN AND PER
MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS BARRIER
BELOW MITIGATED AREAS, AND ALONG RETAINING WALLS AND SLAB-ON-GRADE FOLDS
WITHIN THE EXTENT OF VAPOR BARRIER BOUNDARY. A MINIMUM 4-INCH THICK BASE
COURSE CONSISTING OF CLEAN #57 STONE (WASHED WITH NO FINES) SHALL BE
INSTALLED BENEATH THE VIMS VAPOR BARRIER. A SIMILAR HIGH PERMEABILITY STONE
MAY BE USED, PENDING APPROVAL BY THE ENGINEER.
2.1.THE VAPOR BARRIER 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 BARRIER SHALL BE INSTALLED UNDER CMU WALLS WHICH SUPPORT
OCCUPIED ENCLOSED SPACES.
2.2.VAPOR BARRIER SHALL BE INSTALLED UNDER SLABS, ON WALLS, AND ALONG
OTHER STRUCTURAL COMPONENTS WHICH COME IN CONTACT WITH BOTH AN
OCCUPIABLE ENCLOSED SPACE AND SOIL. NOT ALL AREAS FOR THE VAPOR BARRIER
MAY BE DEPICTED ON THE DRAWINGS. THE GENERAL CONTRACTOR SHALL VERIFY
ALL REQUIRED LOCATIONS FOR VAPOR BARRIER ALONG VERTICAL WALLS PRIOR TO
CONSTRUCTION.
2.3.ALL CONCRETE BOX-OUTS, INCLUDING BUT NOT LIMITED TO SHOWER/BATH TUB
DRAINS, SHALL HAVE A CONTINUOUS VAPOR BARRIER INSTALLED BELOW.
2.4.VAPOR BARRIER SHALL EXTEND ALONG FOOTING EXTERIOR, IF POSSIBLE, AT
LOCATIONS WHERE EXTERIOR GRADE IS HIGHER THAN INTERIOR GRADE.
2.5.IN AREAS WITH EXPANSION BOARDS (E.G. ALONG COLUMNS), THE VAPOR BARRIER
MUST BE SEALED DIRECTLY TO THE CONCRETE WITH THE EXPANSION BOARD BE
INSTALLED OVER THE VAPOR BARRIER.
3.SUB-SLAB SLOTTED VAPOR COLLECTION PIPE SHALL BE SOIL GAS COLLECTOR MAT (1" X
12"). AS AN ALTERNATIVE, SOCKET-WELD 3" SCH 40 PVC PIPE WITH 0.020" TO 0.060"
SLOT WIDTH AND 1/8" SLOT SPACING MAY BE USED. ANOTHER SLOT PATTERN, OR SCH
40 PVC PERFORATED PIPE WITH 5/8" OR SMALLER DIAMETER PERFORATIONS, OR
ANOTHER PIPE WITH SIMILAR AIR FLOW CHARACTERISTICS TO THE SLOTTED PIPE MAY
BE USED PENDING APPROVAL BY THE DESIGN ENGINEER. IF CIRCULAR PIPE IS USED, A
PVC TERMINATION SCREEN (WALRICH CORPORATION #2202052, OR SIMILAR) SHOULD
BE INSTALLED ON THE END OF PIPE.
3.1.SOIL GAS COLLECTOR MAT SHALL NOT BE USED THROUGH A CONCRETE FOOTING.
SCH 40 PVC PIPE (3" DIA) SHALL BE USED FOR ALL SUB-SLAB VENT PIPE CROSSINGS
THROUGH FOOTINGS. IF SOIL GAS COLLECTOR MAT IS USED, MANUFACTURER
APPROVED FITTINGS SHALL BE UTILIZED TO CONNECT THE SOIL GAS COLLECTOR
MAT TO PVC PIPING FOR CROSSINGS THROUGH FOOTINGS.
3.2.SLOTTED COLLECTION PIPING (IF INSTALLED) SHALL BE SET WITHIN THE MINIMUM
4” BASE COURSE LAYER, WITH APPROXIMATELY 1” OF BASE COURSE MATERIAL
BELOW THE PIPING.
4.3" SCH 40 PVC RISER DUCT PIPING SHALL BE INSTALLED TO CONNECT EACH SLAB
PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT WITH
STATIONARY VENTILATOR (SEE SPECIFICATION #5). ABOVE-SLAB RISER DUCT PIPE THAT
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.
4.1.VERTICAL RISER PIPING SHALL BE CONNECTED WITH PVC PRIMER AND GLUE.
4.2.VERTICAL RISER PIPING MUST BE INSTALLED PER 2018 NORTH CAROLINA STATE
PLUMBING CODE.
4.3.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.THE RISER DUCT PIPING SHALL EXTEND IN A VERTICAL ORIENTATION THROUGH THE
BUILDING ROOF AND TERMINATE A MINIMUM OF 1 FT ABOVE THE BUILDING ROOF LINE.
ACTIVE VENTILATION PRODUCTS, INC. AV-3-PVC, OR EMPIRE EVECO 4-INCH
VENTILATORS (OR ALTERNATE APPROVED BY DESIGN ENGINEER) SHALL BE INSTALLED
ON THE EXHAUST DISCHARGE END OF EACH RISER DUCT PIPE. THE RISER DUCT PIPE
AND THE VENTILATOR SHALL BE SECURED TO THE PVC RISER IN A VERTICAL
ORIENTATION.
5.1.THE RISER DISCHARGE SHALL BE POSITIONED WITHIN 3 FEET OF THE ATTIC ACCESS
HATCH IN AN ACCESSIBLE LOCATION.
5.2.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.
5.3.AN ELECTRICAL JUNCTION BOX (120VAC REQUIRED) SHALL BE INSTALLED WITHIN 3
FEET OF THE ATTIC ACCESS AND RISER IN THE ATTIC/ROOF HEEL 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 ON THE
RISER PIPE IN THE ATTIC NEAR THE DISCHARGE.
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 PIPE AND
MAXIMUM 6 FT SECTION OF PIPE, OR OTHERWISE APPROVED BY THE DESIGN ENGINEER,
SHALL BE SET 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.
7.1.THE MONITORING POINT INTAKE SHALL BE PLACED A MINIMUM OF 5-FT FROM
EXTERIOR FOOTERS, OR AS OTHERWISE APPROVED BY THE DESIGN ENGINEER.
7.2.THE END OF THE MONITORING POINT SHALL CONTAIN A PVC TERMINATION
SCREEN OR AN OPEN END.
7.3.MONITORING POINT ACCESS PORTS SHALL BE FINISHED WITH A LOCKABLE
WEATHERPROOF ENCLOSURE AND A REMOVABLE PIPE PLUG.
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 BARRIER, 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 BARRIER. THE ADDITIONAL THICKENED SLAB OR FOOTER SHALL
NOT ALLOW FOR CONTINUOUS GRAVEL BETWEEN THE VIMS EXTENTS AND EXTERIOR
NON-MITIGATED AREAS.
10.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL AVOID THE USE OF
TEMPORARY FORM BOARDS THAT PENETRATE THE VAPOR BARRIER WHERE POSSIBLE. IF
TEMPORARY FORM BOARDS ARE USED, THE SIZE AND NUMBER OF PENETRATIONS
THROUGH THE VAPOR BARRIER 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 BARRIER MANUFACTURER INSTALLATION INSTRUCTIONS.
10.1.HOLLOW FORMS OR CONDUITS THAT CONNECT THE SUB-SLAB ANNULAR SPACE TO
ENCLOSED ABOVE SLAB SPACES SHALL NOT BE PERMITTED.
10.2.AREAS OF UTILITY BANKS (e.g. LOCATION OF THREE OR MORE ADJACENT UTILITIES
THROUGH THE SLAB) SHALL BE SEALED TO CREATE AN AIR-TIGHT BARRIER AROUND
THE UTILITY CONDUITS USING RAVEN POUR N'SEAL OR STEGO-INDUSTRIES MASTIC
PRIOR TO THE SLAB POUR. OTHER SEALANT METHODS IF USED SHALL BE
APPROVED BY THE DESIGN ENGINEER PRIOR TO APPLICATION.
11.INSPECTIONS: THE INSTALLATION CONTRACTOR(S) SHALL NOT COVER ANY PORTIONS
OF THE VIMS WITHOUT INSPECTION. INSPECTIONS OF EACH COMPONENT OF THE VIMS
SHALL BE CONDUCTED BY THE DESIGN 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
VENTILATOR 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.
06/13/23
REVISION 2
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VIMS VAPOR BARRIER AND BASE COURSE1
NTSVM-B
BASE COURSE - CLEAN # 57 STONE (WASHED
WITH NO FINES), MIN 4" THICK BENEATH VIMS
VAPOR BARRIER (SEE SPECIFICATION #2)
VAPOR BARRIER (SEE SPECIFICATION #2)CONCRETE FLOOR SLAB
SUB-BASE
CONCRETE FLOOR SLAB
SLOTTED COLLECTION PIPE (ALTERNATIVE COLLECTION PIPING)2
NTSVM-B
SUB-BASE
SOIL GAS COLLECTOR MAT SET WITHIN MIN
4" BASE COURSE (SEE SPECIFICATION #3)
SECTION THROUGH EXTERIOR WALL3
NTSVM-B
VAPOR BARRIER SEALED TO CONCRETE
PER MANUFACTURER INSTRUCTIONS
SUB-BASEIF EXTERIOR GRADE IS HIGHER THAN THE
SLAB ELEVATION, WRAP VAPOR BARRIER
UP THE SIDE OF THE FOOTER
EXTERIOR GRADE (VARIES)
FULLY GROUTED CMU
BLOCK WALL
STUD WALL
BRICK OR HOUSE SIDING
EXTERNAL WALL (NOT
PRESENT AT ALL LOCATIONS)
BASE COURSE
VAPOR BARRIER
FOOTER
SECTION THROUGH TURNED DOWN SLAB AT DRIVEWAY4
NTSVM-B
COMPACTED FILL
BELOW DRIVEWAY
DRIVEWAY
STUD WALL OR EXTERNAL WALL(NOT PRESENT IN ALL LOCATIONS)
GARAGE
SUB-BASE
BASE COURSE
VAPOR BARRIER SEALED TO CONCRETEPER MANUFACTURER INSTRUCTIONSEXTEND VAPOR BARRIER TO OUTSIDE
OF FOOTER, WHERE POSSIBLE
SECTION THROUGH TENANT SEPARATION BLOCK WALL5
NTSVM-B
VAPOR BARRIER SEALED TO CONCRETE
PER MANUFACTURER INSTRUCTIONS
SUB-BASE
BASE COURSE
FOOTER
VAPOR BARRIER BENEATH
CONCRETE BLOCK FOUNDATION
FULLY GROUTED CMU
BLOCK WALL, IF PRESENT
SINGLE OR DOUBLE STUD
SEPARATION WALL
FOUNDATION MAY INCLUDE
POURED FOOTERS WITH BLOCK
WALLS, OR BE A MONOLITHIC SLAB
AND FOOTER CONCRETE POUR
CONCRETE
FLOOR SLAB
BASE COURSE
SUB-BASE
VIMS PIPING THROUGH THICKENED SLAB
NTS
6
VM-B
SOLID 3"
SCH 40 PVC
VAPOR BARRIER SEALED TO PIPE
PER MANUFACTURER
INSTRUCTIONS
PROVIDE PIPE SUPPORT TO PREVENT
LOW POINT IN SOLID PIPE. MAINTAIN 1%
SLOPE TOWARD SLOTTED SECTION OF
PIPE
VAPOR
BARRIER
VAPOR BARRIER
BENEATH FOOTER
WALL (VARIES)
PIPE SLEEVE
(SEE SPECIFICATION #12)
SOIL GAS
COLLECTOR MAT
MANUFACTURER SPECIFIED
FITTING TO 3" SCH 40 PVC
SOIL GAS COLLECTOR MAT IS NOT
PERMITTED TO BE INSTALLED THROUGH
CONCRETE FOOTERS OR THICKENED SLABS
VIMS PIPING THROUGH SLAB STEPS
NTS
7
VM-B
SUB-BASE MINIMUM 1% SLOPE TOWARD
SLOTTED SECTIONS
BASE COURSE
3" SCH 40 PVC
45-DEGREE ELBOW
VAPOR BARRIER SEALED TO
PIPE PER MANUFACTURER
INSTRUCTIONS
SOLID 3" SCH 40 PVC
PIPE SLEEVE
(SEE SPECIFICATION #12)
WALL (VARIES)
VAPOR BARRIER
SLOPE
MANUFACTURER SPECIFIED
FITTING TO 3" SCH 40 PVC
SOIL GAS
COLLECTOR MAT
VIMS AT VERTICAL RISER (ALTERNATIVE COLLECTION PIPE)
NTS
8
VM-B
BRICK OR HOUSE SIDING
EXTERNAL WALL (NOT PRESENT
AT ALL LOCATIONS)
STUD WALL
VAPOR BARRIER SEALED TO
PIPE AND CONCRETE PER
MANUFACTURER INSTRUCTIONS.
3" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #5)
4" TO 3" PVC REDUCER
4" SCH 40 PVC RISER DUCT PIPE
BASE COURSE
SOIL GAS
COLLECTOR MAT
SUB-BASE
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)
TERMINATE VAPOR
BARRIER AT SOIL
GRADE, WHERE
APPLICABLE
MECH.
CLOSET
VAPOR BARRIER
EXTERIOR PERMANENT VACUUM MEASURING POINT9
NTSVM-B
SLOPE
WALL (VARIES)PROVIDE LOCKABLE WEATHERPROOF
ENCLOSURE ON OUTSIDE OF BUILDING
WALL (OR SIMILAR). AFFIX LABEL AT
BOX WITH "VAPOR MITIGATION SYSTEM".
PLACE REMOVABLE PIPE PLUG AT END
OF 2" PIPE.
VAPOR BARRIER SEALED TO CONCRETE
PER MANUFACTURER INSTRUCTIONS
2" SCH 40 PVC 90
DEGREE ELBOW
2" SOLID SCH 40 PVC PIPE
INSTALLER SHALL SECURE PIPE TO
PREVENT MOVEMENT OR DAMAGE TO
PIPE DURING THE CONCRETE POUR
FINAL GRADE
(VARIES)BASE COURSE
2" OPEN-ENDED PIPE, PLACED A MINIMUM OF
5' FROM EXTERIOR TURN-DOWN SLABS
VAPOR BARRIER
VAPOR BARRIER SEALED TO PIPE PER
MANUFACTURER INSTRUCTIONS
POSITION PIPE TO AVOID REINFORCING
(REBAR). SEE STRUCTURAL DRAWINGS
FOR REINFORCING DETAILS
VIMS EXHAUST AT ROOFTOP WITH HORIZONTAL OFFSET
NTS
FROM RISER
(SEE DETAIL 10/10A)
ROOFTOP
PIPE SUPPORTS PER NC
BUILDING CODE
10
VM-B
ATTIC HATCH/OPENING
SOLID 3" SCH 40 PVC,
LENGTH VARIES
ELECTRICAL JUNCTION BOX FOR
POTENTIAL FUTURE VACUUM FAN
(SEE TO SPECIFICATION #7)
DISCHARGE TERMINATES MINIMUM 1' ABOVE ROOF
AND 10-FT FROM OPERABLE OPENING INTO BUILDING.WATERPROOF
FLASHING
STATIONARY VENTILATOR (SEE SPECIFICATION #5)
SLOPE
MIN 1% SLOPE TOWARD
EXTRACTION POINT
RYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
H&H NO. NVR.019
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
VM-B
SECTION DETAILS
# 1 - 10
BUILDINGS 1002,
1004, 1005, & 1012
PROFESSIONAL APPROVAL / SEAL
JUNE 13, 2023
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REVISION 2
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RYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
VM-C
H&H NO. NVR.019
DETAIL #11
BUILDINGS 1002,
1004, 1005, & 1012
PROFESSIONAL APPROVAL / SEAL
JUNE 13, 2023
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GARAGE OR BACK SIDE OF UNIT
FRONT OF UNITS
MONITORING POINT ORIENTATION - BUILDING 100211A
VM-C NTS
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 2
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 2
ORIENTATION)
VACUUM MONITORING POINT ORIENTATION - OPTION 1
(BLUE)
VACUUM MONTIORING POINT ORIENTATION - OPTION 2
(GREEN)
VERTICAL RISER APPROXIMATE LOCATION
LEGEND FOR DETAILS 11A, 11B, & 11C
NOTES:
1.ONLY ONE MONITORING POINT ORIENTATION STYLE, OPTION
1 OR OPTION ,2 SHOULD BE INSTALLED TO PROVIDE ONE
MONITORING POINT PER TOWNHOME UNIT, AND TO ALLOW
FOR REPRESENTATIVE LOCATIONS ACROSS THE SLAB WITH
SEVERAL MONITORING POINTS LOCATED ALONG THE BACK
OF THE BUILDINGS, AND SEVERAL MONITORING POINTS
ALONG THE FRONT SIDE OF THE BUILDINGS .
2.THE LAYOUTS DEPICTED ARE FOR GENERAL REFERENCE
ONLY. REFER TO SHEETS VM-1 AND VM-2 FOR PROPOSED
LOCATIONS FOR VIMS COMPONENTS.
3.SOME UNIT LAYOUTS MAY BE MIRRORED. FINAL LAYOUTS
WILL BE INCLUDED IN THE AS-BUILT DRAWINGS.
GARAGE OR BACK SIDE OF UNIT
FRONT OF UNITS
MONITORING POINT ORIENTATION - BUILDINGS 1004 & 101211C
VM-C NTS
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB
VAPOR SAMPLE (OPTION 2
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 2
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 2
ORIENTATION)
GARAGE OR BACK SIDE OF UNIT
FRONT OF UNITS
MONITORING POINT ORIENTATION - BUILDING 100511B
VM-C NTS
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 1
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 2
ORIENTATION)
PROPOSED SUB-SLAB VAPOR
SAMPLE (OPTION 2
ORIENTATION)
06/13/23
REVISION 2
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Attachment B

Previous Assessment Data Summary
Separation Page
Intentionally Left Blank
LEGEND
SITE PROPERTY BOUNDARY
PARCEL BOUNDARY
SURFACE WATER FEATURE
COMPOSITE SOIL SAMPLE AREA
PROPOSED BUILDING FOOTPRINT
HISTORICAL SOIL SAMPLE ALIQUOT
HISTORICAL SOIL GAS VAPOR SAMPLING
POINT
HISTORICAL SOIL SAMPLE LOCATION
SOIL GAS VAPOR SAMPLING POINT
ST
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HOLLAND AVENUE
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NOTES:
1.AERIAL IMAGERY AND PARCEL DATA OBTAINED
FROM MECKLENBURG COUNTY GIS (2020).
2.DEVELOPMENT PLAN OBTAINED FROM NVR, INC.
DEVELOPMENT LAYOUT IS APPROXIMATE.
BLDG

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REVISION NO. 0
JOB NO. NVR-019
DATE: 4-14-23
FIGURE NO. 2
ATANDO-DOUBLE OAKS PROPERTY
NEWLAND ROAD
CHARLOTTE, NORTH CAROLINA
SAMPLE LOCATION MAP WITH
DEVELOPMENT OVERLAY
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VSP-2
VSP-1/VSP-DUP
VSP-4
VSP-3
CS-3
CS-4
CS-2
CS-1
CS-7/CS-DUP
CS-5 CS-6
A
S-1B
S-9
S-10
S-11/DUP-1
S-12
S-13
S-14
S-14AS-16
S-15
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ABCDE
ABCDE
ABCDEF
ABCDEF
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B
VSP-9
VSP-6
VSP-10
VSP-8
VSP-14
VSP-12
VSP-13
VSP-7
VSP-11
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Table 1Summary of Soil Analytical Results
Atando-Double Oaks Property1302 & 1340 Newland Avenue
Brownfields Project ID #11037-07-060Charlotte, NC
H&H Project No. BWR-013
Sample ID CS-1 CS-1B CS-2 CS-2B CS-3 CS-3A CS-4 CS-4D CS-5 CS-5A CS-6 CS-6E CS-7 CS-7B
Sample Type Composite Grab Composite Grab Composite Grab Composite Grab Composite Grab Composite Grab Composite Grab Composite Grab
Sample Depth (ft bgs)0-2 1-2 0-1 0-1 0-1 0-1 0-2 1-2 0-2 1-2 0-2 0-2 0-4 1-2 0-4 1-2
Sample Date
VOCs by EPA 8260 (mg/kg)
Acetone NA 0.027 NA 0.073 NA 0.067 NA 0.026 NA 0.027 NA 0.100 NA 0.011 J NA 0.010 J 12,000 140,000 ------
Acrolein NA <0.001 NA 0.001 J NA 0.002 J NA 0.002 J NA <0.001 NA 0.002 J NA <0.001 NA <0.001 0.031 0.13 ------
Bromomethane NA <0.002 NA 0.004 J NA <0.002 NA 0.003 J NA <0.001 NA <0.002 NA <0.002 NA <0.002 1.4 6.4 ------
Ethanol NA <0.016 NA 0.330 NA <0.016 NA <0.016 NA <0.017 NA 0.031 J NA <0.015 NA <0.015 NS NS ------
Ethylbenzene NA <0.0007 NA 0.001 J NA 0.0007 J NA <0.0007 NA <0.0007 NA 0.0009 J NA <0.0006 NA <0.0006 6.1 27 ------
Methyl Ethyl Ketone (MEK)NA 0.002 J NA 0.006 J NA 0.005 J NA 0.002 J NA 0.001 J NA 0.006 J NA 0.001 J NA 0.001 J 5,500 40,000 ------
Methylene Chloride NA 0.002 J NA 0.002 J NA 0.003 J NA <0.001 NA 0.002 J NA 0.003 J NA <0.001 NA 0.002 J 58 650 ------
Toluene NA 0.001 J NA 0.001 J NA 0.0008 J NA 0.0009 J NA <0.0008 NA 0.002 J NA 0.0008 J NA 0.0008 J 990 9,700 ------
o-Xylene NA 0.0006 J NA 0.001 J NA 0.0007 J NA <0.0006 NA <0.0006 NA 0.0008 J NA <0.0006 NA <0.0006 140 590 ------
m,p-Xylene NA 0.001 J NA 0.004 J NA 0.002 J NA <0.001 NA <0.001 NA 0.003 J NA <0.001 NA <0.001 120 510 ------
Xylene (Total)NA 0.002 J NA 0.006 J NA 0.003 J NA <0.006 NA <0.0006 NA 0.003 J NA <0.0006 NA <0.0006 120 530 ------
SVOCs by 8270 (mg/kg)
BDL NA BDL NA BDL NA BDL NA BDL NA BDL NA BDL NA BDL NA ----------
Metals by 6020/7196/7471 (mg/kg)
Arsenic 1.33 NA 2.26 NA 2.05 NA 1.7 NA 2.09 NA 3.76 NA 0.777 J NA 0.785 J NA 0.68 3.0 0.33 - 2.9 1.0 - 18 4.8
Barium 152 NA 126 NA 154 NA 63.8 NA 117 NA 82.9 NA 129 NA 138 NA 3,100 47,000 43 - 420 50 - 1,000 356
Cadmium 0.0937 J NA 0.102 J NA 0.116 J NA <0.0636 NA 0.0849 J NA <0.0718 NA <0.0605 NA 0.0625 J NA 14 200 <0.0074 - 0.55 1.0 - 10 (3)4.3 (3)
Chromium 66.2 NA 90.8 NA 93.9 NA 71.6 NA 57.1 NA 312 NA 64.5 NA 80.5 NA NS NS 13 - 190 7.0 - 300 65
Chromium (III)65.615 NA 90.005 NA 93.9 NA 70.37 NA 56.341 NA 310.31 NA 63.800 NA 79.728 NA 23,000 350,000 13 - 188.66 NS NS
Chromium (VI)0.585 NA 0.795 NA <0.172 NA 1.23 NA 0.759 NA 1.69 NA 0.700 NA 0.772 NA 0.31 6.5 <0..298 - 2.63 NS NS
Lead 16.7 NA 24.2 NA 27.3 NA 9.41 NA 22.1 NA 13.3 NA 6.24 NA 7.72 NA 400 800 <2.1 - 39 ND - 50 16
Mercury (Total)<0.0141 NA 0.0251 J NA 0.0312 J NA 0.0258 J NA 0.0220 J NA 0.0477 NA <0.0132 NA <0.0132 NA 2.3 9.7 <0.011 - 0.14 0.03 - 0.52 0.121
Selenium <1.06 NA <1.15 NA <1.03 NA <1.04 NA <1.15 NA 1.24 J NA <0.990 NA <0.990 NA 78 1,200 <0.045 - 1.1 J <0.1 - 0.8 0.42
Silver <0.0481 NA <0.0522 NA <0.0470 NA <0.0474 NA <0.0521 NA <0.0535 NA <0.0451 NA <0.0451 NA 78 1,200 <0.0029 - 0.23 ND - 5.0 (3)NS
Hexavalent Chromium by 7199
Chromium (VI)0.22 J NA <0.49 NA NA NA 0.29 J NA 0.38 J NA 1.01 NA 0.42 J NA 0.26 J NA 0.31 6.5 <0.298 - 2.63 NS NS
Pesticides by 8081B (mg/kg)
Chlordane NA 0.0729 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 1.7 7.7 ------
alpha-Chlordane NA 0.0168 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 7.1 100 ------
gamma-Chlordane NA 0.0117 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 7.1 100 ------
4,4'-DDD NA 0.0043 J NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.38 4.9 ------
Dieldrin NA 0.0611 NA NA NA NA NA NA NA NA NA NA NA NA NA NA 0.034 0.14 ------
Notes:1) NC Department of Environmental Quality (DEQ) Health Based Preliminary Soil Remediation Goals (PSRGs) dated June 2021 and based upon carcinogenic total risk of 1.0E-06 and non-carcinogenic target hazard quotient of 0.2.2) Range and mean values of background metals for North Carolina soils taken from Elements in North American Soils by Dragun and Chekiri, 2005.3) Background values reported for soils of the southeastern United States.4) Background metals obtained from on-site soil stockpile characterization data collected between 7/28 and 7/30/21With the exception of metals, only constituents detected in at least one sample are shown.Soil concentrations are reported in milligrams per kilogram (mg/kg).Compound concentrations are reported to the laboratory method detection limits.BOLD indicates constituent concentration exceeds Residential Health Based PSRG.BOLD and underlined indicates constituent concentration exceeds Industrial/Commercial Health Based PSRG.VOCs = Volatile Organic Compounds; SVOCs = Semi-Volatile Organic Compounds;mg/kg = milligrams per kilogram; NS = Not Specified; ND = Not Detected; NA = Not Analyzed; ft bgs = feet below ground surfaceJ = Detected but below the Reporting Limit; therefore, result is an estimated concentration.
Regional Background Metal
Concentrations (2)
(mg/kg)
11/29/2021
CS-5
MeanRange
Site-Specific Background Metal Concentrations (4) (mg/kg)
Range
CS-6
11/29/202111/29/202111/29/2021 11/29/2021 11/29/2021 11/29/2021
CS-1 CS-2
Residential
Health Based PSRGs(1)
(mg/kg)
Industrial/
Commercial
Sample Area CS-3 CS-4 CS-7 / CS-DUP
CS-DUP
11/29/2021
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/Beauxwright (BWR)/BWR-013 Atando - Double Oaks Lot/Brownfields/BF Assessment/Tables/Data Tables
Table 1 (Page 1 of 1])
Hart & Hickman, PC
Table 1
Complete Summary of Soil Gas Vapor Analytical Data
Atando - Double Oaks Property
1302 and 1340 Newland Avenue
Charlotte, North Carolina
Brownfields #11037-07-060
H&H Project No. NVR-019
General Corresponding
Building Number(s) 1002 1009 1012 1004 & 1005 1003 1014 1007 & 1008 1006 & 1007 1016 1010 & 1011 1017 1013 Screening Criteria
Sample ID VSP-2 VSP-3 VSP-4 VSP-5 VSP-6 VSP-7 VSP-8 VSP-10 VSP-11 VSP-12 VSP-13 VSP-14
Sample Date
Units
VOCs (TO-15)
Acetone 8.96 9.62 10.7 6.12 14.8 31.1 22.2 44.1 72.3 12.3 7.53 B 32.1 29.7 29.5 21.4 51.7 NE
Benzene 0.447 J 0.434 J <0.0733 0.272 J 1.13 J 2.89 1.95 1.58 J 3.53 0.539 J 0.648 J 3.84 1.49 J 3.71 1.45 J 9.32 12
Bromodichloromethane <0.150 <0.150 <0.150 <0.150 2.60 J <0.150 <0.150 <0.150 <0.150 <0.150 <0.150 <0.150 <0.150 <0.150 <0.150 <0.150 2.5
Bromomethane <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 <0.115 0.283 J <0.115 <0.115 35
1,3-Butadiene <0.328 <0.328 <0.328 <0.328 <0.328 <0.328 0.752 J <0.328 <0.328 <0.328 <0.328 <0.328 <0.328 <0.328 <0.328 <0.328 3.1
Carbon Disulfide 12.1 12.7 0.442 J <0.0608 8.07 11.6 9.62 15.8 47.9 0.448 J 0.657 J 70.7 5.99 J 14.6 17.6 16.8 4,900
Chlorobenzene <0.107 <0.107 <0.107 <0.107 <0.107 0.340 J <0.107 <0.107 <0.107 <0.107 <0.107 <0.107 <0.107 <0.107 <0.107 <0.107 350
Chloroethane <0.164 <0.164 <0.164 <0.164 <0.164 <0.164 <0.164 <0.164 3.50 <0.164 <0.164 <0.164 <0.164 <0.164 <0.164 <0.164 27,800
Chloroform 1.17 J 1.10 J <0.0864 0.644 J 13.2 0.517 J 0.659 J <0.086 <0.086 <0.086 <0.086 0.414 J 0.380 J <0.086 12.1 1.62 J 4.1
Chloromethane <0.0673 <0.0673 <0.0673 <0.0673 <0.0673 <0.067 <0.067 <0.067 0.497 J <0.067 <0.067 0.704 J <0.067 <0.067 <0.067 <0.067 630
Cyclohexane <0.161 <0.161 <0.161 <0.161 <0.161 <0.161 <0.161 <0.161 <0.161 <0.161 <0.161 3.50 <0.161 <0.161 <0.161 <0.161 42,000
1,3-Dichlorobenzene <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 <0.174 1.27 J 1.45 J NE
Dichlorodifluoromethane (Freon 12)3.36 3.54 3.61 3.65 3.78 3.68 3.50 3.13 2.05 J 3.47 3.41 3.20 3.22 3.81 3.13 4.63 700
1,2-Dichloroethane <0.129 <0.129 <0.129 <0.129 <0.129 <0.129 <0.129 <0.129 1.11 J <0.129 <0.129 <0.129 <0.129 <0.129 <0.129 <0.129 3.6
Ethyl Acetate <0.136 <0.136 <0.136 <0.136 <0.136 0.428 J <0.136 <0.136 <0.136 <0.136 <0.136 <0.136 <0.136 <0.136 0.648 J <0.136 490
Ethylbenzene 0.847 J 0.860 J <0.106 0.508 J 9.13 3.00 2.00 J 2.48 2.90 <0.106 <0.106 3.54 1.85 J 3.53 2.00 J 1.86 J 37
4-Ethyltoluene <0.128 <0.128 <0.128 <0.128 2.31 J 0.442 J 0.422 J 0.525 J 0.545 J <0.128 <0.128 0.658 J <0.128 0.653 J 0.467 J 0.501 J NE
1,1,2-Trichloro-1,2,2-trifluoroethane 0.759 J 0.797 J <0.561 0.659 J 0.835 J 0.789 J 0.819 J 0.689 J <0.561 0.705 J 0.735 J 0.751 J 0.590 J 0.651 J 0.636 J 0.636 J 35,000
Heptane 0.639 J 0.643 J <0.143 0.947 J 1.05 J 3.66 1.19 J 2.60 13.3 <0.143 0.409 J 4.72 2.32 3.36 2.34 1.53 J 2,800
Hexane 0.899 J 0.842 J 0.493 J 0.747 J 0.966 J 3.33 1.56 J 4.33 27.0 <0.047 <0.047 5.41 7.42 4.81 2.32 1.83 4,900
2-Hexanone (MBK)<0.285 <0.285 5.83 <0.285 <0.285 <0.285 <0.285 1.55 J <0.285 <0.285 <0.285 <0.285 <0.285 <0.285 1.10 J 1.36 J 210
Isopropanol 1.37 B, J 1.57 B, J 3.92 B, J 3.44 B, J 1.95 B, J 6.51 B 3.99 B, J 3.42 B, J 4.47 B, J 2.87 B, J 3.65 B, J 3.57 B, J 4.87 B, J 4.51 B, J 4.26 B, J 3.48 B, J 1,400
2-Butanone (MEK)1.15 J 3.58 1.65 1.90 1.01 J 2.97 2.03 4.59 11.9 <0.224 0.911 J 6.89 2.68 2.95 2.38 6.00 35,000
4-Methyl-2-pentanone (MIBK)<0.121 <0.121 <0.121 <0.121 <0.121 0.598 J 0.364 J 1.67 J 0.770 J <0.121 <0.121 <0.121 2.52 0.765 J 1.35 J 1.62 J 21,000
Methylene Chloride 2.28 2.78 2.04 2.00 2.23 5.48 1.40 J 8.85 7.35 3.15 3.80 2.26 5.66 2.23 1.13 J 5.72 3,400
Naphthalene <0.183 <0.183 6.28 <0.183 24.1 <0.183 <0.183 1.15 J 1.02 J <0.183 <0.183 0.927 J <0.183 0.933 J 0.880 J 0.744 J 2.8
Propene <0.242 <0.242 <0.242 <0.242 <0.242 20.1 <0.242 111 423 <0.242 <0.242 67.1 <0.242 14.3 <0.242 4.46 21,000
Styrene <0.124 <0.124 <0.124 <0.124 <0.124 <0.124 <0.124 0.579 J 0.672 J <0.124 <0.124 0.515 J 0.553 J 0.668 J 0.472 J <0.124 7,000
Tetrachloroethylene <0.181 <0.181 <0.181 <0.181 <0.181 153 <0.181 0.556 J 1.63 J 5.75 <0.181 1.04 J 1.82 J <0.181 0.949 J 0.915 J 280
Tetrahydrofuran <0.107 0.843 J <0.107 0.268 J 0.377 J 0.345 J 0.672 J 1.12 J 0.810 J <0.107 <0.107 2.13 <0.107 0.645 J 2.93 0.371 J 14,000
Toluene 2.71 2.79 0.724 J 0.520 J 27.5 28.7 60.8 28.9 21.0 0.508 J 1.28 J 33.5 34.2 28.3 24.4 16.5 35,000
Trichloroethylene <0.199 <0.199 <0.199 <0.199 <0.199 0.531 J <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 <0.199 14
Trichlorofluoromethane (Freon 11)2.01 J 2.10 J 2.26 J 2.02 J 2.49 J 1.87 J 2.37 J 1.81 J 1.24 J 2.19 J 2.32 J 2.11 J 1.92 J 1.76 J 1.96 J 1.78 J NE
1,2,4-Trimethylbenzene <0.110 <0.110 <0.110 0.850 J 6.13 1.15 J 1.59 J 2.45 J 2.23 J <0.110 <0.110 2.76 1.47 J 2.25 J 1.79 J 1.50 J 420
1,3,5-Trimethylbenzene <0.236 <0.236 <0.236 <0.236 2.34 J <0.236 0.348 J 0.599 J 0.599 J <0.236 <0.236 0.786 J 0.353 J 0.442 J 0.407 J <0.236 420
o-Xylene 1.02 J 1.09 J <0.157 0.360 J 10.7 2.80 2.51 2.82 2.58 <0.157 <0.157 3.78 2.38 3.68 2.20 2.06 J 700
m&p-Xylene 3.43 J 3.65 J 0.625 J 2.29 J 40.8 9.77 7.72 10.1 9.69 3.84 J 3.85 J 13.0 9.00 11.6 8.31 7.58 700
Xylene (Total)4.45 J 4.74 J 0.625 J 2.65 J 51.5 12.6 10.2 12.9 12.3 3.84 J 3.85 J 16.8 11.4 15.3 10.5 9.64 J 700
DEQ Risk Calculator Acceptable Risk Levels
Cumulative LICR 9.1 x 10-7 <1.0 x 10-4
Cumulative HI 0.13 <1.0
Notes:
1) North Carolina Department of Environmental Quality (NCDEQ) Residential Sub-Slab and Exterior Soil Gas Screening Levels (SGSLs) dated January 2023 and based on a TCR of 1 x 10-6 and a THQ of 0.2.
EPA analytical method shown in parenthesis.
Compound concentrations are reported to the laboratory method detection limit (MDL).
Only compounds detected in at least one sample and select chlorinated compounds are shown in the table above. Refer to laboratory analytical report for all compounds.
Compound concentrations are reported in micrograms per cubic meter (µg/m3).
The DEQ Risk Calculator results for the Decmeber 2021 soil gas samples were reported in the Environmental Management Plan dated May 17, 2022, and used the DEQ Risk Calculator dated June 2021.
The April 2023 soil gas samples utilized the NCDEQ Cumulative Risk Calculator dated January 2023.
Worst case risk calculations include highest the concentration of any compound detected in any sample.
Bold value indicates an exceedance of the SGSL.
NE = not established; VOCs = volatile organic compounds; TCR = target cancer risk; THQ = target hazard quotient
LICR = lifetime incremental cancer risk; HI = noncarcinogenic hazard index
B = analyte was detected in laboratory blank.
J = detected concentration is above the laboratory method detection limit, but below the laboratory calibrated reporting limit resulting in a laboratory estimated value.
Residential SGSLs(1)
4/4/2023
1015
0.28
1.3 x 10-5
Worst Case Residential - Soil Gas to Indoor Air
1001
VSP-9 / VSP-DUP
4.8 x 10-6
0.080
VSP-1 / VSP-DUP
12/1/2021
µg/m3
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/NVR, Inc/NVR-019 - Atando Ave/Addl Assess/Tables/Data Tables.xlsx
Table 1
Hart & Hickman, PC
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Prepared By:Daniel Gaspari
Maximum Concentrations in Site-Wide Soil-Gas
North Carolina Department of Environmental Quality
Risk Calculator
Atando-Double Oaks Property
1302 & 1340 Newland Avenue
Brownfields (Project #11037-07-060)
BWR-013
June 2021
May 2021 EPA RSL Table
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: June 2021
Basis: May 2021 EPA RSL Table
Site ID: BWR-013
Exposure Unit ID: Maximum Concentrations in Site-Wide Soil-Gas
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: June 2021
Basis: May 2021 EPA RSL Table
Site ID: BWR-013
Exposure Unit ID: Maximum Concentrations in Site-Wide Soil-Gas
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 Factors and Target Risks
Version Date: June 2021
Basis: May 2021 EPA RSL Table
Site ID: BWR-013
Exposure Parameter Site Specific Value Justification
Target Cancer Risk (individual)1.0E-06
Target Cancer Risk (cumulative)1.0E-04
Target Hazard Index (individual)2.0E-01
Target Hazard Index (cumulative)1.0E+00
Lifetime (LT) (years)70
Body Weight (BW) (kg)15
Exposure Duration (ED) (yr)6
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)2373
Soil Adherence Factor (AF) (mg/cm2)0.2
Soil Ingestion Rate (IRS) (mg/day)200
Skin Surface Area - Water Exposure (SAw) (cm2)6365
Water Ingestion Rate (IRW) (L/d)0.78
Water Exposure Time (ETevent) (hr/event)0.54
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)20
Exposure Frequency (EF) (d/yr)350
Exposure Time (ET) (hr)24
Skin Surface Area - Soil Exposure (SAs) (cm2)6032
Soil Adherence Factor (AF) (mg/cm2)0.07
Soil Ingestion Rate (IRS) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)2.5
Water Exposure Time (ETevent) (hr/event)0.71
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Exposure Duration (ED) (yr)25
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.12
Soil Ingestion Rate (IR) (mg/day)100
Skin Surface Area - Water Exposure (SAw) (cm2)19652
Water Ingestion Rate (IRW) (L/d)0.83
Water Exposure Time (ETevent) (hr/event)0.67
Water Event Frequency (EV) (events/day)1
Lifetime (LT) (years)70
Body Weight (BW) (kg)80
Working Weeks (EW) (wk/yr)50
Exposure Duration (ED) (yr)1
Exposure Frequency (EF) (d/yr)250
Exposure Time (ET) (hr)8
Skin Surface Area - Soil Exposure (SAs) (cm2)3527
Soil Adherence Factor (AF) (mg/cm2)0.3
Soil Ingestion Rate (IR) (mg/day)330
Recreator Trespasser
Lifetime (LT) (years)70 NA 70
Averaging Time (AT) (days/yr)365 NA 365
Body Weight (BW) (kg)15 NA 15
Exposure Duration 0-2 (ED) (yr)2 NA 2
Exposure Duration 2-6 (ED) (yr)4 NA 4
1
70
80
330
1
250
8
3527
0.3
50
100
19652
2.5
0.71
1
20
350
24
6032
0.07
0.54
1
70
80
2373
0.2
200
6365
0.78
Input Form 1B
Exposure Unit ID: Maximum Concentrations in Site-Wide Soil-Gas
Residential Child
General
Residential Adult
Default Value
1.0E-06
1.0E-04
2.0E-01
1.0E+00
70
15
6
350
24
Non-Residential Worker
Construction Worker
User Defined Child
70
80
25
250
8
3527
0.12
100
19652
0.83
0.67
North Carolina DEQ Risk Calculator
Exposure Factors and Target Risks
Version Date: June 2021
Basis: May 2021 EPA RSL Table
Site ID: BWR-013
Exposure Parameter Site Specific Value Justification
Input Form 1B
Exposure Unit ID: Maximum Concentrations in Site-Wide Soil-Gas
Default Value
Exposure Frequency (EF) (d/yr)195 NA 195
Exposure Time (ET) (hr)2 NA 2
Skin Surface Area - Soil Exposure (SAs) (cm2)2373 NA 2373
Soil Adherence Factor (AF) (mg/cm2)0.2 NA 0.2
Soil Ingestion Rate (IRS) (mg/day)200 NA 200
Skin Surface Area - Water Exposure (SAw) (cm2)6365 NA 6365
Water Ingestion Rate (IRW) (L/hr)0.124 NA 0.124
Water Exposure Time (ETevent) (hr/event)2 NA 2
Water Event Frequency (EV) (events/day)1 NA 1
Recreator Trespasser
Lifetime (LT) (years)70 70 70
Body Weight (BW) (kg)80 45 80
Exposure Duration 6-16 (ED) (yr)10 10 10
Exposure Duration 16-26 (ED) (yr)10 0 10
Exposure Frequency (EF) (d/yr)195 90 195
Exposure Time (ET) (hr)2 2 2
Skin Surface Area - Soil Exposure (SAs) (cm2)6032 6032 6032
Soil Adherence Factor (AF) (mg/cm2)0.07 0.2 0.07
Soil Ingestion Rate (IRS) (mg/day)100 200 100
Skin Surface Area - Water Exposure (SAw) (cm2)19652 19652 19652
Water Ingestion Rate (IRW) (L/hr)0.0985 0.071 0.0985
Water Exposure Time (ETevent) (hr/event)2 2 2
Water Event Frequency (EV) (events/day)1 1 1
User Defined Adult
North Carolina DEQ Risk Calculator
Exposure Point ConcentrationsVersion Date: June 2021
Basis: May 2021 EPA RSL TableSite ID: BWR-013
Exposure Unit ID: Maximum Concentrations in Site-Wide Soil-Gas
Description of Exposure Point Concentration Selection:
Exposure Point Concentration
(ug/m3)Notes:CAS Number Chemical Minimum Concentration (Qualifier)
Maximum Concentration (Qualifier)
Units Location of Maximum Concentration
Detection Frequency
Range of Detection Limits
Concentration Used for Screening
Background Value
Screening Toxicity Value (Screening Level) (n/c)
Potential ARAR/TBC Value
Potential ARAR/TBC Source
COPC Flag (Y/N)
Rationale for Selection or Deletion
14.8 VSP-4 67-64-1 Acetone ug/m3
1.13 J flag, VSP-4 71-43-2 Benzene ug/m3
2.6 J flag, VSP-4 75-27-4 Bromodichloromethane ug/m3
12.7 VSP-DUP 75-15-0 Carbon Disulfide ug/m3
13.2 VSP-4 67-66-3 Chloroform ug/m3
3.78 VSP-4 75-71-8 Dichlorodifluoromethane ug/m3
9.13 VSP-4 100-41-4 Ethylbenzene ug/m3
0.843 J flag, VSP-DUP 109-99-9 ~Tetrahydrofuran ug/m3
1.05 J Flag, VSP-4 142-82-5 Heptane, N-ug/m3
0.966 J Flag, VSP-4 110-54-3 Hexane, N-ug/m3
5.83 VSP-2 591-78-6 Hexanone, 2-ug/m3
3.92 J-Flag, B-Flag, VSP-2 67-63-0 Isopropanol ug/m3
3.58 VSP-DUP 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
2.78 VSP-DUP 75-09-2 Methylene Chloride ug/m3
24.1 VSP-4 91-20-3 ~Naphthalene ug/m3
27.5 VSP-4 108-88-3 Toluene ug/m3
0.835 J flag, VSP-4 76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-ug/m3
2.49 J flag, VSP-4 75-69-4 Trichlorofluoromethane ug/m3
6.13 VSP-4 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
2.34 J flag, VSP-4 108-67-8 Trimethylbenzene, 1,3,5-ug/m3
40.8 VSP-4 106-42-3 Xylene, P-ug/m3
40.8 VSP-4 108-38-3 Xylene, m-ug/m3
10.7 VSP-4 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: June 2021
Basis: May 2021 EPA RSL Table
Site ID: BWR-013
Exposure Unit ID: Maximum Concentrations in Site-Wide Soil-Gas
Receptor Pathway Carcinogenic
Risk Hazard Index Risk exceeded?
Soil NC NC NC
Groundwater Use*NC NC NC
Soil NC NC NC
Groundwater Use*NC NC NC
Construction Worker Soil NC NC NC
Soil NC NC NC
Surface Water*NC NC NC
Receptor Pathway Carcinogenic Risk Hazard Index Risk exceeded?
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.3E-05 2.8E-01 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air 1.0E-06 2.2E-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
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
VSP-5
North Carolina Department of Environmental Quality
Risk Calculator
Atando - Double Oaks Property
1302 and 1340 Newland Avenue
DEQ DWM Brownfields
11037-07-060
January 2023
November 2022 EPA RSL Table
Prepared By:Hart & Hickman, PC
Hart & Hickman, PC
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: VSP-5
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: VSP-5
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
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: VSP-5
Description of Exposure Point Concentration Selection:
Exposure Point
Concentration
(ug/m3)
Notes:CAS Number Chemical
Minimum
Concentration
(Qualifier)
Maximum
Concentration
(Qualifier)
Units
Location of
Maximum
Concentration
Detection
Frequency
Range of
Detection
Limits
Concentration
Used for
Screening
Background
Value
Screening
Toxicity Value
(Screening
Level) (n/c)
Potential
ARAR/TBC
Value
Potential
ARAR/TBC
Source
COPC Flag
(Y/N)
Rationale for
Selection or
Deletion
31.1 67-64-1 Acetone ug/m3
2.89 71-43-2 Benzene ug/m3
11.6 75-15-0 Carbon Disulfide ug/m3
0.34 108-90-7 Chlorobenzene ug/m3
0.517 67-66-3 Chloroform ug/m3
3.68 75-71-8 Dichlorodifluoromethane ug/m3
0.428 141-78-6 Ethyl Acetate ug/m3
3 100-41-4 Ethylbenzene ug/m3
0.345 109-99-9 ~Tetrahydrofuran ug/m3
3.66 142-82-5 Heptane, N-ug/m3
3.33 110-54-3 Hexane, N-ug/m3
6.51 67-63-0 Isopropanol ug/m3
2.97 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
0.598 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
5.48 75-09-2 Methylene Chloride ug/m3
20.1 115-07-1 Propylene ug/m3
153 127-18-4 Tetrachloroethylene ug/m3
28.7 108-88-3 Toluene ug/m3
0.789 76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-ug/m3
0.531 79-01-6 Trichloroethylene ug/m3
1.87 75-69-4 Trichlorofluoromethane ug/m3
1.15 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
9.77 108-38-3 Xylene, m-ug/m3
2.8 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: VSP-5
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 31.1 0.933 --
71-43-2 Benzene 2.89 0.0867 3.6E-01 6.3E+00 2.4E-07 2.8E-03
75-15-0 Carbon Disulfide 11.6 0.348 -1.5E+02 4.8E-04
108-90-7 Chlorobenzene 0.34 0.0102 -1.0E+01 2.0E-04
67-66-3 Chloroform 0.517 0.01551 1.2E-01 2.0E+01 1.3E-07 1.5E-04
75-71-8 Dichlorodifluoromethane 3.68 0.1104 -2.1E+01 1.1E-03
141-78-6 Ethyl Acetate 0.428 0.01284 -1.5E+01 1.8E-04
100-41-4 Ethylbenzene 3 0.09 1.1E+00 2.1E+02 8.0E-08 8.6E-05
109-99-9 ~Tetrahydrofuran 0.345 0.01035 -4.2E+02 5.0E-06
142-82-5 Heptane, N-3.66 0.1098 -8.3E+01 2.6E-04
110-54-3 Hexane, N-3.33 0.0999 -1.5E+02 1.4E-04
67-63-0 Isopropanol 6.51 0.1953 -4.2E+01 9.4E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)2.97 0.0891 -1.0E+03 1.7E-05
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)0.598 0.01794 -6.3E+02 5.7E-06
75-09-2 Methylene Chloride 5.48 0.1644 1.0E+02 1.3E+02 1.6E-09 2.6E-04
115-07-1 Propylene 20.1 0.603 -6.3E+02 1.9E-04
127-18-4 Tetrachloroethylene 153 4.59 1.1E+01 8.3E+00 4.3E-07 1.1E-01
108-88-3 Toluene 28.7 0.861 -1.0E+03 1.7E-04
76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-0.789 0.02367 -1.0E+03 4.5E-06
79-01-6 Trichloroethylene 0.531 0.01593 4.8E-01 4.2E-01 3.3E-08 7.6E-03
75-69-4 Trichlorofluoromethane 1.87 0.0561 --
95-63-6 Trimethylbenzene, 1,2,4-1.15 0.0345 -1.3E+01 5.5E-04
108-38-3 Xylene, m-9.77 0.2931 -2.1E+01 2.8E-03
95-47-6 Xylene, o-2.8 0.084 -2.1E+01 8.1E-04
Cumulative:9.1E-07 1.3E-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
Risk for Individual Pathways Output Form 1A
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: VSP-5
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 9.1E-07 1.3E-01 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
3. NM = Not modeled, user did not check this pathway as complete.
4. NC = Pathway not calculated, required contaminant migration parameters were not entered.
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
North Carolina DEQ Risk Calculator
Version Date:
Basis:
Site Name:
Site Address:
DEQ Section:
Site ID:
Exposure Unit ID:
Submittal Date:
Reviewed By:
Worst Case Risk Calculator (VSP-6 through VSP-14)
North Carolina Department of Environmental Quality
Risk Calculator
Atando - Double Oaks Property
1302 and 1340 Newland Avenue
DEQ DWM Brownfields
11037-07-060
January 2023
November 2022 EPA RSL Table
Prepared By:Hart & Hickman, PC
Hart & Hickman, PC
North Carolina DEQ Risk Calculator
Table of Contents
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: Worst Case Risk Calculator (VSP-6 through VSP-14)
Form No.
Input Form 1A Complete Exposure Pathways
Input Form 1B Exposure Factors and Target Risks
Input Form 1C Contaminant Migration Parameters
Input Form 1D Sample Statistics
Input Form 2A Soil Exposure Point Concentration Table
Input Form 2B Groundwater Exposure Point Concentration Table
Input Form 2C Surface Water Exposure Point Concentration Table
Input Form 2D Soil Gas Exposure Point Concentration Table
Input Form 2E Indoor Air Exposure Point Concentration Table
Output Form 1A Risk for Individual Pathways
Output Form 1B Sitewide Risk
Output Form 2A Resident Soil
Output Form 2B Resident Groundwater Use
Output Form 2C Non-Residential Worker Soil
Output Form 2D Non-Residential Worker Groundwater Use
Output Form 2E Construction Worker Soil
Output Form 2F Recreator/Trespasser Soil
Output Form 2G Recreator/Trespasser Surface Water
Output Form 3A Resident Groundwater to Indoor Air
Output Form 3B Resident Soil Gas to Indoor Air
Output Form 3C Resident Indoor Air
Output Form 3D Non-Residential Worker Groundwater to Indoor Air
Output Form 3E Non-Residential Worker Soil Gas to Indoor Air
Output Form 3F Non-Residential Worker Indoor Air
Output Form 4A Soil to Groundwater - Forward Mode
Output Form 4B Groundwater to Groundwater - Forward Mode
Output Form 4C Soil to Surface Water - Forward Mode
Output Form 4D Groundwater to Surface Water - Forward Mode
Output Form 4E Soil to Groundwater - Backward Mode
Output Form 4F Groundwater to Groundwater - Backward Mode
Output Form 4G Soil to Surface Water - Backward Mode
Output Form 4H Groundwater to Surface Water - Backward Mode
Output Section 4 - Contaminant Migration Worksheets
Output Section 3 - Vapor Intrusion Calculators
TOC
Description
DATA INPUT SHEETS
Check box
if included
Input Section 1 - Exposure Pathways & Parameters
Input Section 2 - Exposure Point Concentrations
DATA OUTPUT SHEETS
Output Section 1 - Summary Output for All Calculators
Output Section 2 - Direct Contact Soil and Groundwater Calculators
North Carolina DEQ Risk Calculator
Complete Exposure Pathways
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: Worst Case Risk Calculator (VSP-6 through VSP-14)
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
Resident
Non-Residential Worker
CONTAMINANT MIGRATION PATHWAYS
Groundwater
Surface Water
Input Form 1A
VAPOR INTRUSION PATHWAYS
DIRECT CONTACT SOIL AND WATER PATHWAYS
Resident
Non-Residential Worker
Recreator/Trespasser
North Carolina DEQ Risk Calculator
Exposure Point Concentrations
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: Worst Case Risk Calculator (VSP-6 through VSP-14)
Description of Exposure Point Concentration Selection:
Exposure Point
Concentration
(ug/m3)
Notes:CAS Number Chemical
Minimum
Concentration
(Qualifier)
Maximum
Concentration
(Qualifier)
Units
Location of
Maximum
Concentration
Detection
Frequency
Range of
Detection
Limits
Concentration
Used for
Screening
Background
Value
Screening
Toxicity Value
(Screening
Level) (n/c)
Potential
ARAR/TBC
Value
Potential
ARAR/TBC
Source
COPC Flag
(Y/N)
Rationale for
Selection or
Deletion
72.3 VSP-8 67-64-1 Acetone ug/m3
9.32 VSP-14 71-43-2 Benzene ug/m3
2.83 VSP-12 74-83-9 Bromomethane ug/m3
0.752 VSP-6 106-99-0 Butadiene, 1,3-ug/m3
70.7 VSP-10 75-15-0 Carbon Disulfide ug/m3
12.1 VSP-13 67-66-3 Chloroform ug/m3
0.704 VSP-10 74-87-3 Chloromethane ug/m3
3.5 VSP-10 110-82-7 Cyclohexane ug/m3
4.63 VSP-14 75-71-8 Dichlorodifluoromethane ug/m3
1.11 VSP-8 107-06-2 Dichloroethane, 1,2-ug/m3
0.648 VSP-13 141-78-6 Ethyl Acetate ug/m3
3.5 VSP-8 75-00-3 Ethyl Chloride (Chloroethane)ug/m3
3.54 VSP-10 100-41-4 Ethylbenzene ug/m3
2.93 VSP-13 109-99-9 ~Tetrahydrofuran ug/m3
13.3 VSP-8 142-82-5 Heptane, N-ug/m3
27 VSP-8 110-54-3 Hexane, N-ug/m3
1.55 VSP-7 591-78-6 Hexanone, 2-ug/m3
4.87 VSP-11 67-63-0 Isopropanol ug/m3
11.9 VSP-8 78-93-3 Methyl Ethyl Ketone (2-Butanone)ug/m3
2.52 VSP-11 108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)ug/m3
8.85 VSP-7 75-09-2 Methylene Chloride ug/m3
1.15 VSP-7 91-20-3 ~Naphthalene ug/m3
423 VSP-8 115-07-1 Propylene ug/m3
0.672 VSP-8 100-42-5 Styrene ug/m3
5.75 VSP-9 127-18-4 Tetrachloroethylene ug/m3
60.8 VSP-6 108-88-3 Toluene ug/m3
0.819 VSP-6 76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-ug/m3
2.37 VSP-6 75-69-4 Trichlorofluoromethane ug/m3
2.76 VSP-10 95-63-6 Trimethylbenzene, 1,2,4-ug/m3
0.786 VSP-10 108-67-8 Trimethylbenzene, 1,3,5-ug/m3
13 VSP-10 108-38-3 Xylene, m-ug/m3
3.78 VSP-10 95-47-6 Xylene, o-ug/m3
Input Form 2D
Soil Gas Exposure Point Concentration Table
Note: Chemicals highlighted in orange are non-volatile chemicals. Since these chemicals do not pose a vapor intrusion risk, no risk values are calculated for these chemicals.
If the chemical list is changed from a prior calculator run, remember to select "See All Chemicals" on the data output sheet or newly added chemicals will not be included in risk calculations
North Carolina DEQ Risk Calculator
DEQ Risk Calculator - Vapor Intrusion - Resident Soil Gas to Indoor Air
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: Worst Case Risk Calculator (VSP-6 through VSP-14)
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 72.3 2.169 --
71-43-2 Benzene 9.32 0.2796 3.6E-01 6.3E+00 7.8E-07 8.9E-03
74-83-9 Bromomethane 2.83 0.0849 -1.0E+00 1.6E-02
106-99-0 Butadiene, 1,3-0.752 0.02256 9.4E-02 4.2E-01 2.4E-07 1.1E-02
75-15-0 Carbon Disulfide 70.7 2.121 -1.5E+02 2.9E-03
67-66-3 Chloroform 12.1 0.363 1.2E-01 2.0E+01 3.0E-06 3.6E-03
74-87-3 Chloromethane 0.704 0.02112 -1.9E+01 2.3E-04
110-82-7 Cyclohexane 3.5 0.105 -1.3E+03 1.7E-05
75-71-8 Dichlorodifluoromethane 4.63 0.1389 -2.1E+01 1.3E-03
107-06-2 Dichloroethane, 1,2-1.11 0.0333 1.1E-01 1.5E+00 3.1E-07 4.6E-03
141-78-6 Ethyl Acetate 0.648 0.01944 -1.5E+01 2.7E-04
75-00-3 Ethyl Chloride (Chloroethane)3.5 0.105 -8.3E+02 2.5E-05
100-41-4 Ethylbenzene 3.54 0.1062 1.1E+00 2.1E+02 9.5E-08 1.0E-04
109-99-9 ~Tetrahydrofuran 2.93 0.0879 -4.2E+02 4.2E-05
142-82-5 Heptane, N-13.3 0.399 -8.3E+01 9.6E-04
110-54-3 Hexane, N-27 0.81 -1.5E+02 1.1E-03
591-78-6 Hexanone, 2-1.55 0.0465 -6.3E+00 1.5E-03
67-63-0 Isopropanol 4.87 0.1461 -4.2E+01 7.0E-04
78-93-3 Methyl Ethyl Ketone (2-Butanone)11.9 0.357 -1.0E+03 6.8E-05
108-10-1 Methyl Isobutyl Ketone (4-methyl-2-pentanone)2.52 0.0756 -6.3E+02 2.4E-05
75-09-2 Methylene Chloride 8.85 0.2655 1.0E+02 1.3E+02 2.6E-09 4.2E-04
91-20-3 ~Naphthalene 1.15 0.0345 8.3E-02 6.3E-01 4.2E-07 1.1E-02
115-07-1 Propylene 423 12.69 -6.3E+02 4.1E-03
100-42-5 Styrene 0.672 0.02016 -2.1E+02 1.9E-05
127-18-4 Tetrachloroethylene 5.75 0.1725 1.1E+01 8.3E+00 1.6E-08 4.1E-03
108-88-3 Toluene 60.8 1.824 -1.0E+03 3.5E-04
76-13-1 Trichloro-1,2,2-trifluoroethane, 1,1,2-0.819 0.02457 -1.0E+03 4.7E-06
75-69-4 Trichlorofluoromethane 2.37 0.0711 --
95-63-6 Trimethylbenzene, 1,2,4-2.76 0.0828 -1.3E+01 1.3E-03
108-67-8 Trimethylbenzene, 1,3,5-0.786 0.02358 -1.3E+01 3.8E-04
108-38-3 Xylene, m-13 0.39 -2.1E+01 3.7E-03
95-47-6 Xylene, o-3.78 0.1134 -2.1E+01 1.1E-03
Cumulative:4.8E-06 8.0E-02
All concentrations are in ug/m3
Output Form 3B
Carcinogenic risk and hazard quotient cells highlighted in orange are associated with non-volatile chemicals. Since these chemicals do not pose a vapor intrusion
risk, no risk values are calculated for these chemicals.
North Carolina DEQ Risk Calculator
Risk for Individual Pathways Output Form 1A
Version Date: January 2023
Basis: November 2022 EPA RSL Table
Site ID: 11037-07-060
Exposure Unit ID: Worst Case Risk Calculator (VSP-6 through VSP-14)
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 4.8E-06 8.0E-02 NO
Indoor Air NC NC NC
Groundwater to Indoor Air NC NC NC
Soil Gas to Indoor Air NC NC NC
Indoor Air NC NC NC
Pathway Source
Source Soil NC
Source Groundwater NC
Source Soil NC
Source Groundwater NC
Groundwater Exceedence of 2L at Receptor?
Exceedence of 2L at Receptor?
1. If lead concentrations were entered in the exposure point concentration tables, see the individual calculator sheets for lead
concentrations in comparison to screening levels. Note that lead is not included in cumulative risk calculations.
Notes:
3. NM = Not modeled, user did not check this pathway as complete.
4. NC = Pathway not calculated, required contaminant migration parameters were not entered.
DIRECT CONTACT SOIL AND WATER CALCULATORS
Resident
Non-Residential Worker
Recreator/Trespasser
2. * = If concentrations in groundwater exceed the NC 2L Standards or IMAC, or concentrations in surface water exceed the
NC 2B Standards, appropriate remediation and/or institutional control measures will be necessary to be eligible for a risk-based
closure.
Surface Water Exceedence of 2B at Receptor?
Exceedence of 2B at Receptor?
VAPOR INTRUSION CALCULATORS
Resident
Non-Residential Worker
CONTAMINANT MIGRATION CALCULATORS
Target Receptor Concentrations Exceeded?
North Carolina DEQ Risk Calculator

Attachment C

VIMS Components Specification Sheets

• Raven VaporBlock 20 (VBP-20) Product Sheet and Installation Instructions
• Drago-Wrap Vapor Intrusion Barrier Product Sheets and Installation Instructions
• Soil Gas Collector Mat Product Information & Installation Guide
• Slotted PVC Pipe Product Specification Sheets
• Ventilator Specification Sheets
• Monitoring Point Specification Sheet

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
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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
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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.
Separation Page
Intentionally Left Blank
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
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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
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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
Separation Page
Intentionally Left Blank
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
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TRENCH & 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
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STEEL 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
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Intentionally Left Blank

FERGUSON
3” SCH40 SLOTTED .060” wide x .375”
spacing x 3 rows @ 120

East Hwy 30
Paxton, Nebraska 69155
308-239-4281
Customer Signature Approval__________________
3” SCH40
120° Centers
Specifications 3” SCH40 OD – 3.50” Wall – 0.216” ID – 3.068”
Weight – 1.458 lbs per foot
Slot Spacing Slot Width .375” .060”
Separation Page
Intentionally Left Blank
Inside Diameter
of Adaptor
3 5/8" [9.21cm]
Diameter
of Vent
4" [10.16cm]
Overall Height
7 3/4" [19.68cm]
Head Width
7 1/2" [19.12cm]
Inside Louvers
4" [10.16cm] High
1/8" [0.32cm] Opening
Seamless Spun Cap
Outside Louvers
4"[10.16cm] High
1/4" [0.64cm] Opening
Active Ventilation Products, Inc.
311 First Street, Newburgh, NY 12550-4857
800-ROOF VENT (766-3836) Ph: 845-565-7770 Fax: [phone]
Website: roofvents.com Email: [e-mail] 5778-6
Net free area
square inches [cm]square foot [meters]
12 [30.48]0.09 [0.03]
Model: AV-3-PVC 3" Diameter Aura Ventilator with PVC Adaptor
This adaptor is designed to retrofit onto PVC pipes schedule 40 & 80
EVECO VENTILATOR
APPROX.EXHAUST
WEIGHT CAPACITY
SIZE GALV.COPPER PACKED 4-MIWIND
(inches)(gauge)(ounces)(pounds)(CFM)
4 26-28 16 3 40
5 26-28 16 3 45
6 26-28 16 3 50
7 26-28 16 4 60
8 26-28 16 4 75
9 26-28 16 5 100
10 26-28 16 5 120
12 26 16 6 170
14 24-26 16 9 280
15 24-26 16 10 325
16 24-26 16 10 375
IB 24-26 16-20 12 450
20 24-26 16-20 14 580
24 22-24 16-20 24 750
30 22-24 16-20 48 1100
36 22-24 20-24 90 1600
The Eveco Ventilator is a single cone
vent, ideal for low cost ventilation.
Thoughthe cost ofthis unit isslight,
itprovides maximum ventilation in ail
types of weather.
SYPHON VENTILATOR
The Empire Syphon Ventilator is a
dependable stationary exhauster
that functions efficiently in the
slightest breeze,its design utilizes
every wind current to create a pow
erful suction through the stack,while
the storm band circling the upper
cone prevents rain from driving into
the ventilator and adds to its exhaust
capacity.Air outlet is more than dou
ble that of the stack area.
APPROX.EXHAUST
WEIGHT CAPACITY
SIZE GALV.COPPER PACKED 4-MIWIND
(Inches)(gauge)(ounces)(pounds)(CFM)
4 26-28 16 7 65
5 26-28 16 7 70
6 26-28 16 8 75
7 26-28 16 9 85
8 26-28 16 10 105
9 26-28 16 11 140
10 26-28 16 12 190
12 26 16 15 275
14 24-26 16-20 21 380
15 24-26 16-20 25 450
16 24-26 16-20 30 500
18 24-26 16-20 35 620
20 22-24 20 45 740
24 22-24 20-24 70 1010
Empire Ventilation Equipment Co.,Inc.
35-39 Vernon Boulevard
Long Island City, NY 11106-5195
TEL:[phone]
FAX:[phone]
EMPIRE
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WAL-RICH CORPORATION • NEW PRODUCT BULLETIN
CALL [phone] · www.wal-rich.com · FAX [phone]
STAINLESS STEEL TERMINATION SCREENS
Ideal for use on high
efficiency heating equipment
Also as condensate trap
screen & vent stack guard.
Patent# D715,409
2202050 2” Stainless Steel Termination Screen
2202052 3” Stainless Steel Termination Screen
2202054 4” Stainless Steel Termination Screen
2202056 6” Stainless Steel Termination Screen
2202060 1” Stainless Steel Termination Screen
Part# Description
made in usa
♦♦♦♦♦Prevent pests, debris, & leaves from entering vent piping
♦♦♦♦♦Push into hub for easy flush installation. No gluing!
♦♦♦♦♦Patented condensate channel prevents buildup & freezing
♦♦♦♦♦Professional grade finish
Original Gripper ®
Gripper plugs can be used in a variety of
applications including DWV (drain, waste
and vent) testing and stack testing.
End-of-Pipe design won’t fall in, whereas
the Inside-of-Pipe design allows you to
locate the plug inside the pipe as far as
you need. Time tested, the Gripper® Plug
remains one of the most popular
mechanical plugs on the market.
Original Gripper® Plug Features:
• Ideal for sewer testing and long-term applications
• Made with glass-reinforced ABS plastic
• End-of-pipe design seals only at the end of a pipe
• Inside-of-pipe design seals inside pipe as far as needed
Equipped with:
• Easy-to-install extra large zinc wing nut – won’t rust
• Natural rubber o-ring
• Galvanized carriage bolt to prevent corrosion
End-of-Pipe Gripper® plug Inside-of-Pipe Gripper® plug
End-of-Pipe Gripper
Nominal Size Usage Range Maximum Back Pressure Length Product Weight
1-1/2" (40 mm)1.48"–1.65" (39–42 mm)17 psi (1,2 bar)40 ft. (12 M)1.75" (44.5 mm)0.13 lbs (0.05 kg)
2" (50 mm)1.9"–2.17" (49–55 mm)17 psi (1,2 bar)40 ft. (12 M)1.87" (47.5 mm)0.19 lbs (0.09 kg)
3" (75 mm)2.8"–3.1" (71–79 mm)17 psi (1,2 bar)40 ft. (12 M)2.5" (63.5 mm)0.375 lbs (0.16 kg)
4" (100 mm)3.8"–4.06" (96–103 mm)17 psi (1,2 bar)40 ft. (12 M)2.5" (63.5 mm)0.5 lbs (0.23 kg)
6" (150 mm)5.77"–6.08" (147–154 mm)17 psi (1,2 bar)40 ft. (12 M)3.75" (95.3 mm)2.5 lbs (1.14 kg)
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