Vapor Intrusion Mitigation Plan & Compliance Review Letter

August 18, 2020

Sent Via E-mail
Mr. Trinh DeSa, PE Hart & Hickman, PC 2923 S. Tryon, Ste 100
Charlotte, NC, 28203 [e-mail] Subject: Vapor Intrusion Mitigation Plan - Compliance Review Yorkshire Drive
Charlotte, Mecklenburg County Brownfields Project No. 22033-18-060
Dear Mr. DeSa:
The North Carolina Department of Environmental Quality Brownfields Program (DEQ Brownfields) received and reviewed the Vapor Intrusion Mitigation Plan - Revision 1, dated August 12, 2020, and DEQ Brownfields has found this Report to be in compliance with Land Use Restriction e.iii. of the Notice of Brownfields Property and DEQ approval of the Report was provided by email on August 18, 2020.
Consistent with the Brownfields agreement for this project, an essential component of public health protection for this design is the professional engineer’s seal of these documents that the proposed design will be effective at mitigating the potential for vapor intrusion at the property and protecting public health. Furthermore, the safe occupancy of the building will be evaluated upon “Post-
Construction and Pre-Occupancy System Effectiveness Testing” as required by Section 4.0 of the
VIMS Construction Completion Report. In addition, DEQ Brownfields reserves the authority to require confirmation of efficacy in the future. Please be advised that this design compliance review from DEQ Brownfields does not waive any
applicable requirement to obtain any necessary permits, licenses or certifications which may be
required from other state or local entities.
Trinh DeSa, PE
August 18, 2020 Page 2

If you have any questions, please feel free to contact me at my mobile number 980-435-
3657, or via e-mail at [e-mail]

Sincerely,
J. Kevin Slaughter Environmental Specialist II, Brownfields Property Management Unit
Division of Waste Management
ec: Jordan Thompson - DEQ Brownfields Kelly Johnson P.G. - DEQ Brownfields Ralph McGee P.G.- H&H

Via Email
August 12, 2020
NCDEQ – Division of Waste Management Brownfields Program 1646 Mail Service Center
Raleigh, NC 27699-1646
Attn: Mr. Kevin Slaughter Re: Vapor Intrusion Mitigation Plan
Yorkshire Drive
Charlotte, North Carolina Brownfields Project No. 22033-18-060 H&H Project No. NVR-009
Dear Mr. Slaughter:
Enclosed please find a copy of the Vapor Intrusion Mitigation Plan (VIMP) prepared for the Yorkshire Drive Brownfields property (Brownfields Project No. 22033-18-060) located in Charlotte, Mecklenburg County. The VIMP has been revised to address comments provided by
the North Carolina Department of Environmental Quality on August 5, 2020.
Should you have any questions or need additional information, please do not hesitate to contact me at [phone].
Sincerely,
Hart & Hickman, PC

Trinh DeSa, PE Ralph McGee, PG Senior Project Engineer Project Manager

Enclosure cc: Mr. Christopher DeCorte, NVR, Inc. (Via Email) Ms. Joselyn Harriger, PG, NCDEQ (Via Email)
#C-1269 Engineering #C-245 Geology

Vapor Intrusion Mitigation Plan

Yorkshire Drive
Charlotte, North Carolina
Brownfields Project No. 22033-18-060

H&H Job No. NVR-009 June 4, 2020
Revised August 12, 2020

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Vapor Intrusion Mitigation Plan
Yorkshire Drive
Charlotte, North Carolina
Brownfields Project No. 22033-18-060
H&H Job No. NVR-009

Table of Contents

1.0 Introduction ................................................................................................................ 1 
2.0 Design Basis ................................................................................................................ 3 
3.0 Quality Assurance / Quality Control ........................................................................ 7 
4.0 Post-Construction and Pre-Occupancy System Effectiveness Testing ................. 8 
5.0 Post-Occupancy Testing .......................................................................................... 14 
6.0 Future Tenants & Building Uses ............................................................................ 15 
7.0 Reporting .................................................................................................................. 16 

Figures
Figure 1 Site Development Plan
Figure 2 Soil Gas and Sub-Slab Compound Concentration Map

Tables
Table 1 Summary of Sub-Slab Vapor and Soil Gas Analytical Data

Attachments
Attachment 1 Vapor Intrusion Mitigation Plan – Sheets VM-1 through VM-4
Attachment 2 Vapor Intrusion Mitigation System Product Specifications
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Vapor Intrusion Mitigation Plan
Yorkshire Drive
Charlotte, North Carolina
Brownfields Project No. 22033-18-060
H&H Job No. NVR-009

1.0 Introduction

Hart & Hickman, PC (H&H) has prepared this Vapor Intrusion Mitigation Plan (VIMP) for
installation of a vapor intrusion mitigation system (VIMS) during construction of the proposed
townhome development at the Yorkshire Drive Brownfields property (Brownfields Project No.
22033-18-060) located at 3603, 3605, and 3707 South Tryon Street and 324, 330, and 336
Yorkshire Drive in Charlotte, North Carolina (Site or subject Site). The proposed redevelopment
is known as South Tryon Townhomes. The South Tryon Townhomes project is being developed
for residential use by Ryan Homes, an NVR, Inc. company, and includes proposed for-sale
townhome units. This development will include construction of twelve (12) townhome complexes
which includes two five-unit townhome complexes, six six-unit townhome complexes, three eight-
unit townhome complexes, and one nine-unit townhome complex for a total of 79 individual
residential townhome units. A Site Development Plan depicting the proposed townhome
complexes is included as Figure 1.

As outlined in the North Carolina Department of Environmental Quality (DEQ) approved
Environmental Management Plan (EMP) dated December 17, 2019, results of previous exterior
soil gas and sub-slab soil gas sampling completed at the Site indicate that vapor mitigation is
warranted for the ground level residential component of each proposed building due to elevated
concentrations of tetrachloroethylene (PCE), trichloroethylene (TCE), benzene and xylenes
detected in soil gas samples. A summary of exterior soil gas and sub-slab soil gas analytical data
is provided as Table 1, and a compound concentration map is provided as Figure 2.

This VIMP has been prepared for installation of an active VIMS in accordance with Land Use
Restriction 16.e. of the recorded Notice of Brownfields Property for the Site to address potential
vapor intrusion concerns for the proposed buildings. The VIMP is described in the following
sections and was designed in accordance with the DEQ Division of Waste Management (DWM)
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Vapor Intrusion Guidance (VI Guidance) dated March 2018 and the DEQ Brownfields Program
Preliminary Vapor Intrusion Mitigation System Design Submittal New Construction Minimum
Requirements Checklist included as Appendix H of the VI Guidance document.

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2.0 Design Basis

The VIMP is included in Attachment 1 (Sheets VM-1, VM-1A, VM-2, VM-3, and VM-4) and will
be used to guide construction of the VIMS. Each of the 79 proposed South Tryon Townhome
residential townhome units are three- or four-story structures that will be built with a concrete
slab-on-grade foundation with thickened footings under load bearing walls. Each townhome unit
includes 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. The majority of the units
will contain three floors, but some units will contain a loft located on a fourth floor.

Based on information provided by Ryan Homes, there are three internal unit floor plans and three
end unit floor plans with two potential elevations for each townhome unit. Therefore, the VIMS
design includes each potential floor plan as depicted on Sheets VM-2, VM-3, and VM-4. The
different building elevations do not change the structural layout as depicted in the Attachment 1
Sheets. Please note that the final floor plan orientation for each specific lot will be selected at a
later date.

The VIMP includes installation of the Vaporblock® Plus 20 (VBP20) vapor barrier manufactured
by Raven Industries (Raven) beneath the concrete slab for each residential unit. VBP20 is an
ASTM-certified 20-mil, multi-layer, chemically resistant vapor barrier, designed to prevent the
migration of VOCs. Technical specifications and installation instructions obtained from Raven
for the VBP20 vapor barrier are provided in Attachment 2.

The VIMP specifies that the vapor barrier will be installed per manufacturer installation
instructions (Attachment 2). Briefly, VBP20 will be installed by the construction contractor to
cover the ground surface below the entire area of each proposed ground floor slab. The exterior
edges of the VBP20 will be laid underneath the footings or attached and sealed to existing concrete
by utilizing VaporSeal™ tape or Butyl Seal double-sided tape. Seams within the building footprint
will have a minimum 12-inch overlap and will be sealed with VaporSeal™ tape. Small puncture
holes will be sealed with the VaporSeal™ tape or Pour-N-Seal™ and larger holes, tears, or damage
will be repaired using a patch that overlaps the damaged area and then will be taped along the
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seams. In areas where utility penetrations (i.e., piping, ducts, etc.) are present and the use of tape
is not practical or deemed as “ineffective” by the design engineer, the Pour-N-Seal™ method will
be used to form an airtight seal.

Note that other vapor barrier bonding products (i.e., tapes, epoxies, etc.) that do not contain
compounds of concern for the Site and are approved by the design engineer and by the vapor
barrier manufacturer may be used to seal the liner. Please also note that an equivalent vapor barrier
approved by the design engineer which meets the criteria specified in Sheet VM-1A of the VIMP
may also be used by the installation contractor, such as Drago Wrap® manufactured by Stego
Industries. If Drago Wrap® or another design engineer approved alternative vapor barrier is
selected for use, DEQ will be notified in writing.

The VIMP also includes installation of an active mitigation system beneath the ground level of
each occupied residential space to reduce the potential for vapor intrusion through sub-slab
depressurization. Out of an abundance of caution, the VIMS and sub-slab depressurization
treatment will be extended below the ground-level garages of the townhomes. Sub-slab
depressurization will be accomplished using electric fans and poly-vinyl chloride (PVC) vapor
collection/conveyance piping which will collect vapor from beneath the ground floor slabs of each
building and discharge the vapor through exhaust stacks above the building roof. To enhance sub-
slab vapor transmission and collection effectiveness, a uniform layer of high permeability stone
(clean #57 or similar stone) will be installed directly below the concrete slab to allow for air
movement beneath the entirety of the slab. Sub-slab vapor collection piping (3-inch diameter) will
be installed within the high permeability stone layer. The thickness of the high permeability stone
around the piping will extend a minimum of 1-inch above the piping and minimum of 1-inch below
the sub-slab piping (for example, 5-inches of gravel around a 3-inch pipe). In areas without
sub-slab piping, a minimum thickness of 4 inches of clean stone is required.

The VIMP includes RadonAway® RP-145 electric fans (or an equivalent alternative fan approved
by the design engineer) installed in-line in the attic space with the exhaust stack penetrating the
roof and discharging vapor to the atmoshere. The fans will be installed in a designated space
within the attic for the heating, ventilation, and air conditioning (HVAC) system. The designated
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HVAC attic space is vented to the outside air and is not connected to the air circulation to the
below living spaces. There is no air intake between the living spaces and the designated attic space
where the fan will be located. Furthermore, the attics within these townhomes are relatively small
and are not structurally suitable to be occupied by future homeowners or converted into spaces
that would otherwise be connected to occupiable areas of the townhome.

For system redundancy, one RP-145 electric fan will be installed in each individual townhome
unit, and the vent system for each unit will be interconnected with adjacent units constructed on
the same concrete slab. This interconnected system will allow for continued sub-slab
depressurization below the slab if one of the fans stops operating in between periodic inspections.
Furthermore, the VIMS design includes one RP-145 fan per unit (one fan per 640 sq ft). Each RP-
145 fan is generally capable to provide adequate sub-slab depressurization for areas that are five
to six times greater than the footprint of each townhome.

To evaluate the effectiveness of the VIMS, the VIMP includes vacuum measuring points (depicted
in Sheets VM-1A, VM-2, VM-3, and VM-4) that will be installed and used to measure the pressure
differential between indoor air and the sub-slab. A minimum of one vacuum measuring point will
installed for each townhome unit. To prevent disrupting residents in the future, the vacuum
measuring point access ports will be located on the outside of the buildings to avoid entering the
units once they are occupied (see Sheets VM-1 and VM-1A).

The multi-unit townhome buildings will contain one vacuum measuring point located under the
living space or front of each interior unit, and one measuring point located under the garage or
backside of each end unit (see Details 10A and 10B on Sheet VM-1A). Furthermore, in accordance
with the DWM Vapor Intrusion Guidance, a RadonAway® Checkpoint IIA mitigation system
alarm (equipped with an audible alarm and red indicator light) will be installed to notify the
homeowner if the vacuum in the riser pipe decreases below 0.25-in water, which could indicate a
blockage in the vent pipe or an inoperable fan. A sign will be installed next to the low vacuum
alarm to direct the homeowner to contact the Home Owners Association (HOA) if the mitigation
alarm system is activated. Technical specifications and installation instructions for the alarm
system are included on Sheet VM-1, Sheet VM-1A, & Attachment 2. Note, an equivalent
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mitigation alarm that meets the specifications in Attachment 2 may be used per approval by the
design engineer.

During VMS installation, minor modifications to the VIMS piping, monitoring points, and fan
locations may be necessary to account for construction activities related to non-VIMS building
components. These modifications will be approved by the design engineer and will be completed
in general accordance with this VIMS design in the approved VIMP.
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3.0 Quality Assurance / Quality Control

For quality assurance and quality control purposes, inspections will be conducted for each section
of slab during the following phases of VIMS installation activities:
 after installation of horizontal collection system and gravel base placement,
 after vapor barrier installation and prior to the pouring the concrete building slab,
 after installation of vertical exhaust riser pipe and fan installation, and
 after the VIMS is activated to verify that the electric fans and alarms are functioning
properly.

Each inspection will be performed by, or under direction of, the design engineer certifying the
VIMP. The inspections will include field logs and photographs for each section of slab. As
requested, the engineer certifying the report, or designee, will provide DEQ with 48-hrs notice
prior to conducting the inspections.

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4.0 Post-Construction System Effectiveness Testing

Vacuum Influence Testing
Following installation of the horizontal extraction piping, vapor barrier, and concrete slab pours,
vacuum influence testing will be conducted on the VIMS vent piping network to confirm that the
VIMS will provide proper vacuum influence below the slab. Electric radon fans similar to the RP-
145 fans will be attached to the vertical risers and vacuum will be measured at the extraction fan
locations and at the vacuum measuring points for the section of slab being evaluated. Depending
on the construction schedule, the RP-145 fans installed in each unit as part of the VIMS may be
used to run the vacuum influence testing. The type of fans used for the vacuum influence testing
will be provided to DEQ along with the vacuum influence testing results. The results of the
influence tests will be submitted to DEQ with the vapor mitigation system installation report,
unless the influence test reveals that modifications are needed to the VIMS to achieve the required
vacuum influence 4 pascals (0.016 inches water content). In this case, the test results will be
provided to DEQ to facilitate VIMS repairs or modifications. A detail for the measuring points is
included on Sheet VM-1.

As described above, the VIMS design includes one RP-145 fan per unit (one fan per 640 sq ft)
although each RP-145 is generally capable to provide adequate sub-slab depressurization for areas
that are five to six times greater than the footprint of each townhome. Therefore, the installation
of multiple fans on each concrete slab is expected to provide significantly greater than the 4 Pa of
required vacuum influence below the slab. The vacuum influence testing will initially be
conducted with one or two fans per building slab (each slab will contain between five and nine
units) to document vacuum influence if only limited fans were operating and demonstrate the
effectiveness of fan redundancy. Afterward, influence testing will be conducted with all the fans
on each slab operational to provide representative results for the entire system. Vacuum influence
testing results will be documented in the VIMS installation completion report.

Sub-Slab Soil Gas Sampling
Upon completion of successful vacuum influence testing and prior to occupancy of the Site
buildings, sub-slab soil gas samples will be collected from beneath the townhome buildings to
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evaluate accumulation of compound concentrations with the VIMS operational. Two sub-slab soil
gas samples will be collected from select vacuum measuring points in townhome buildings with
five and six units, and three sub-slab soil gas samples will be collected beneath each slab of
townhome buildings with eight or nine units. The sub-slab soil gas sample locations will be chosen
in conservative locations, such as areas with lower vacuum as measured during the vacuum
influence testing. Preliminary locations of the proposed sub-slab soil gas sampling points are
shown on the design sheet VM-1A (Attachment 1). Sub-slab soil gas testing will be conducted
after a minimum of two weeks following the installation of the concrete slab. Due to the
anticipated construction schedule, multiple visits will likely be required to complete sub-slab soil
gas sampling activities.

During each sub-slab soil gas sampling event, one duplicate sub-slab soil gas sample will be
collected 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, a leak test will be performed on each vacuum measuring point by
placing a shroud around the sealed sampling point and sampling train, flooding the air within the
shroud with helium gas, then purging sub-slab soil gas from the sampling point with an electric air
pump or syringe and collecting the purged vapor into a Tedlar bag. A helium gas detector will be
used to measure helium concentrations within the shroud and the Tedlar bag sample and the
concentrations will be recorded in the field notes. The leak test will be considered successful if
the helium concentration measured in the sub-slab soil gas purged from the sampling point and
collected into the Tedlar bag is less than 10% of the concentration measured within the shroud. If
the helium test is unsuccessful, measures will be taken to identify and address the source of the
leak and additional leak testing will be performed. A minimum of 3 volumes will be purged from
the sample train prior to and during the leak check.

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The sub-slab soil gas samples will be collected in 1-liter Summa canisters at an approximate flow
rate of 100 mL/min. The vacuum of the Summa canisters will be measured at the start and end of
sampling event, and will be recorded on the chain-of-custody and within the field notes. The
vacuum in each canister at the conclusion of the sampling event must remain above 0 inches of
mercury (inHg), and ideally around 5 inHg, in accordance with laboratory standard operating
procedures.

The samples will be submitted to a qualified laboratory under standard chain of custody protocols
for analysis volatile organic compounds (VOCs) by EPA Method TO-15 and the laboratory will
be instructed to report J-flag concentrations for each sample. In addition, H&H will request that
the laboratory report compound concentrations to the lower of the laboratory method detection
limits or the DEQ DWM Residential Vapor Intrusion Sub-slab and Exterior Soil Gas Screening
Levels (SGSLs).

Upon receipt of the sub-slab soil gas sample analytical results, H&H will use the most current
version of the DEQ Risk Calculator to evaluate potential vapor intrusion risks for a residential use
scenario based on the proposed use of the Site. If calculated cumulative risks are greater than
1x10-4 for potential carcinogenic risks and/or above a hazard index of 1 for potential non-
carcinogenic risks, indoor air sampling will be completed, as described below.

Note that the generic sub-slab soil gas to indoor air attenuation factor that is the basis for DEQ risk
calculation is conservative and is intended to estimate a potential upper-bound indoor air
concentration accounting for temporal variability. In addition, the sub-slab soil gas to indoor air
attenuation factors do not account for a VIMS with a vapor barrier and sub-slab depressurization
that will greatly further reduce the potential for vapor intrusion. DEQ DWM VI Guidance
indicates that if sub-slab soil gas concentrations do not exceed acceptable risk levels, typically no
further investigation is necessary. However, as a very conservative approach, if the chlorinated
solvents PCE or TCE are detected in the sub-slab soil gas samples above their respective
Residential Vapor Intrusion SGSLs, indoor air sampling will be also be conducted as described
below.

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Post-construction sub-slab soil gas sampling will be completed on an annual basis for two years
following completion of the initial sampling event. A Site-specific list of VOCs will be developed
for analysis after the initial round of sub-slab soil gas sampling. Supplemental sub-slab soil gas
sampling will be completed using the methods discussed above. If sub-slab soil gas sample results
are within acceptable risk levels for the three sampling events (including the initial sampling event)
a request to reduce the frequency of sub-slab soil gas sampling to one sample every 5 years will
be submitted for DEQ review.

Indoor Air Sampling
The buildings are intended to be occupied shortly following construction completion and operation
of the HVAC systems. Therefore, the indoor air sampling event for each affected slab will be
conducted following construction, including completion of the VIMS, but prior to connecting the
building to utilities. One indoor air sample will be collected from each individual building slab
based on the sub-slab sample analytical data as described above. Because each slab contains
multiple units, the indoor air sample will either be collected from a central unit, or from a unit
directly above the sub-slab sample location that contained unacceptable risk levels or detections
of PCE or TCE at concentrations above the DEQ DWM Residential Vapor Intrusion SGSLs.

A portable power source will be utilized to operate the fans associated with the VIMS, which will
be run continuously for a minimum of 24-48 hours prior to sampling, as well as throughout the
sampling period to model representative conditions when the units are occupied and with the
VIMS operating. In addition, during the indoor air sampling event, pressure differential
measurements will be collected from the pressure measuring points located on the bottom floor of
the townhomes being tested.

Each indoor air sample will be collected in accordance with the DWM VI Guidance, using a
laboratory supplied individually certified 6-liter Summa canister over a 24-hour period and
analyzed for select VOCs by EPA Method TO-15. The VOCs for the select analyte list will be
determined based on the compounds detected within the sub-slab soil gas samples, and per
discussion between H&H and DEQ. Each indoor air Summa canister will be connected to a
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dedicated 3 ft sampling cane which will place the indoor air sample intake at a height consistent
with the breathing zone when the sample canister is set on its base.

Periodic checks will be conducted by H&H to monitor the pressure within the Summa canisters to
confirm adequate sample volume is collected. Following sample collection, the samples will be
shipped to the laboratory under standard chain of custody protocol. The analytical laboratory will
be instructed to report J-flag concentrations for each sample. In addition, the laboratory will be
requested to report results to laboratory method detection limits below the DEQ DWM Residential
Vapor Intrusion Indoor Air Screening Levels (IASLs). For QA/QC purposes, one duplicate sample
and one background air sample will be collected during each indoor air sampling event. In
addition, the Indoor Air Building Survey (Appendix C of the DWM VI Guidance) will be
completed for each sampling event.

Note, new construction materials, such as paint, carpet, etc., which could be sources of compounds
of concern in indoor air, may cause interference with Site specific compounds during indoor air
sampling. Therefore, the construction contractor will be requested to provide safety data sheets
(SDS) for materials used during construction which will be submitted to DEQ.

Based upon the results of the indoor air sampling, H&H will make recommendations in general
accordance with the DWM VI Guidance. It is anticipated that the recommendations will consist
of one of the following:

 The VIMS is effective, and no further sampling of indoor air is warranted (per the DWM
VI Guidance, in the case where calculated cumulative risks are below 1 x 10-4 for potential
carcinogenic risks and below a hazard index of 1 for potential non-carcinogenic risks).

 Additional indoor air sampling is warranted to confirm that the VIMS is effective (per the
DWM VI Guidance, in the case where calculated cumulative risks are greater than 1x10-4
for potential carcinogenic risks or above a hazard index of 1 for potential non-carcinogenic
risks).

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If additional indoor air sampling is required, modifications to the existing system(s) will first be
evaluated to increase effectiveness (i.e., increasing the size of the fan). DEQ will be notified of
alterations to the system(s).

Sub-Slab Gas and Indoor Air and Effectiveness Reporting
The results of the sub-slab gas and indoor air sampling will be submitted to DEQ with the VIMS
installation completion report for the proposed townhome buildings. However, if additional indoor
air sampling is required based upon the recommendations above, a report of the indoor air sampling
will be submitted to DEQ after completion of the sampling and receipt of the analytical data. As
mentioned above, two post-construction sub-slab soil gas sampling events will be completed on
an annual basis following construction of the townhomes. Brief reports will be submitted to DEQ
to document the results of the post-construction sub-slab soil gas sampling events after completion
of the sampling and receipt of the analytical data.

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5.0 Post-Construction VIMS Vacuum Influence Monitoring

The VIMS is proposed as an active system which will utilize sub-slab vapor extraction through
vapor extraction piping and electric fans. As noted above, vacuum influence testing will be
completed by collecting vacuum measurements from the permanent vacuum measuring sample
ports associated with each residential townhome. If the vacuum falls below 4 pascals (0.016-in
water column), then H&H will evaluate the VIMS to determine the cause and potential repairs or
modifications required to obtain the desired vacuum. DEQ Brownfields will be notified within
48-hours of discovering differential pressure less than 4 pascals in a vacuum measuring point.

For the first year of VIMS operation, vacuum measurement readings at each permanent measuring
point will be collected each month and reported to DEQ on a quarterly basis following the
sampling. After the first year of monitoring, it is expected that vacuum measurements will be
measured quarterly and submitted to DEQ during the annual Land Use Restriction Updates
(LURU). However, after the first year, H&H and DEQ will evaluate the data and discuss the
appropriate frequency of future monitoring events.

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6.0 Future Tenants & Building Uses

The homeowners association (HOA) or property management group will be responsible for
continuing operation of the VIMS in accordance with the VIMP. The future use of the proposed
Site buildings is individual ownership of the townhome units. After occupancy in the townhomes,
the townhome community HOA will maintain the vapor mitigation piping and fans. 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. To aid in identification of the vapor mitigation piping, the mitigation piping will be
labeled with “Vapor Mitigation – Contact HOA”, or similar language, on all accessible piping at
intervals of no greater than 10-linear feet and the active fans will be labeled with “Vapor Mitigation
System – Contact HOA if Fan Is Not Operating or Damaged”, or similar. In addition, a label near
the mitigation alarm will instruct the homeowners/tenants to contact the HOA if the alarm is
activated.

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7.0 Reporting

A vapor intrusion mitigation system installation report (sealed by a NC-licensed PE) that
documents installation activities associated with the VIMS will be submitted to DEQ following
confirmation that the mitigation system is installed, effective, and operating as designed. The
report will include a summary of VIMS installation activities, quality assurance and quality control
measures, post-installation system effectiveness testing including sub-slab soil gas and/or indoor
air assessment (if warranted) results, inspection documents, SDSs, and an opinion as to whether
the VIMS was installed in accordance with the DEQ approved VIMP. Due to the townhome
construction and occupancy schedule, several vapor mitigation system installation completion
reports may be submitted to DEQ for review.

In order to provide guidance for post-construction maintenance of the VIMS, an operations and
maintenance (O&M) plan will be prepared by a NC-licensed PE and submitted to DEQ upon
construction of all the units. The O&M plan will include the procedures to be followed during
required annual third-party inspections of the VIMS. Inspections will include visual observations
of the building slabs and perimeter/footer edges for cracks or damage and inspections of the active
mitigation fans for rust and function. The inspections will be documented in a system certification
letter to be submitted with the annual LURU. The certification letter will be signed and sealed by
a NC licensed PE. Further details will be provided in the O&M plan submittal.

Furthermore, post-construction vacuum monitoring data will be submitted to DEQ on a quarterly
basis during the first year of operation, and on an annual basis thereafter. DEQ will be notified
within 48-hours of identified system failure including low vacuum alarm or pressure monitoring
not meeting requirements described in this VIMP.

Figures
REVISION NO. 0
JOB NO. BOU-007
DATE: 1-20-2020
FIGURE NO. 1
YORKSHIRE DRIVE BROWNFIELDS SITE
SOUTH TRYON & YORKSHIRE DRIVE
CHARLOTTE, NORTH CAROLINA
SITE DEVELOPMENT PLAN
LEGEND
SITE PROPERTY BOUNDARY
PROPOSED BUILDINGS
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
STAX
(3722 S. TRYON STREET)
T
R
Y
C
L
A
N

D
R
I
V
E
RESIDENTIALS. TRYON STREETYO
R
K
S
H
I
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D
R
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V
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RESIDENTIAL
ELLENWOOD PLACEDE
U
T
S
C
H
E

P
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C
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S
S
(3
6
4
2

&

3
6
3
0

S
.

T
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S
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)
(3700 ELLENWOOD PLACE)
PARTS PLUS AUTO
STORAGE
(3631 TRYCLAN DRIVE)
FAMILY DOLLAR
(3529 S. TRYON STREET)
QUINTER TEXTILE GROUP
(3600 S. TRYON STREET)S:\AAA-Master Projects\Boulevard Realty Estate Advisors (BOU)\BOU-007 Yorkshire Dr Brownfields\Figures\Site Map_1.24.19.dwg, FIG 1, 1/20/2020 12:22:49 PM, nhotzelt
SG-6
SS-2
SG-5
SS-1
SG-2 SG-1
SG-3SG-4
SG-1
BENZENE 1,100
ETHYLBENZENE 1,600
PCE 400
1,2,4-TMB 1,100
VINYL ACETATE 2,000
m&p-XYLENE 5,900
o-XYLENE 1,700
LICR 1.4E-4
HI 4.7
SS-1
PCE 4,300
TCE 410
LICR 3.9E-5
HI 9.0
SG-6
LICR 6.9E.6
HI 0.23
SS-2
LICR 1.5E-6
HI 0.045
SG-5
BENZENE 440
ETHYLBENZENE 400
m&p-XYLENE 1,500
LICR 4.9E-5
HI 1.4
SG-4
BENZENE 560
ETHYLBENZENE 1,400
1,2,4-TMB 930
m&p-XYLENE 5,100
o-XYLENE 1,500
LICR 8.4E-5
HI 3.2
SG-2
BENZENE 180
m&p-XYLENE 860
LICR 2.2E-5
HI 0.7
SG-3
BENZENE 770
TCE 15
LICR 7.2E-5
HI 1.1
REVISION NO. 0
JOB NO. NVR-008
DATE: 8-13-19
FIGURE NO. 2
YORKSHIRE DRIVE BROWNFIELDS SITE
SOUTH TRYON & YORKSHIRE DRIVE
CHARLOTTE, NORTH CAROLINA
SOIL GAS AND SUB-SLAB COMPOUND
CONCENTRATION MAP
LEGEND
SITE PROPERTY BOUNDARY
EXISTING BUILDINGS
DIESEL ABOVEGROUND STORAGE
TANK
GASOLINE ABOVEGROUND
STORAGE TANK
SOIL VAPOR SAMPLE LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
STAX
(3722 S. TRYON STREET)
T
R
Y
C
L
A
N

D
R
I
V
E
RESIDENTIAL
PARTS PLUS AUTO STORE
(3631 TRYCLAN DRIVE)S. TRYON STREETYO
R
K
S
H
I
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E

D
R
I
V
E
RESIDENTIAL
ELLENWOOD PLACESALON
RESIDENCE
UNITED HOME CARE
WAREHOUSE
AMERICAN FENCE
QUINTER TEXTILE GROUP
(3600 S. TRYON STREET)
FAMILY DOLLAR
(3529 S. TRYON STREET)
DE
U
T
S
C
H
E

P
R
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E
S
S
(3
6
4
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&

3
6
3
0

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S
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)
(3700 ELLENWOOD PLACE)
MIRACLE CLEANERS AND
THE LIQUOR LOUNGE
NOTES:
1)SOIL GAS AND SUB-SLAB SAMPLES COLLECTED BY H&H IN
SEPTEMBER 2018.
2)ONLY CONSTITUENTS DETECTED ABOVE DEPARTMENT OF
ENVIRONMENTAL QUALITY SOIL GAS SCREENING LEVELS
(SGSLs) ARE SHOWN
3)CONCENTRATIONS ARE REPORTED IN μg/m3.
4)BOLD INDICATES CONCENTRATIONS EXCEED RESIDENTIAL
SGSLs.
5)UNDERLINE INDICATES CONCENTRATIONS EXCEED THE
NON-RESIDENTIAL SGSLs.
6)PCE = TETRACHLOROETHENE
TCE = TRICHLOROETHENE
1,2,4-TMB = 1,2,4-TRIMETHYLBENZENE
LICR = LIFETIME INCREMENTAL CANCER RISK
HI = HAZARD INDEX
SG-3
BENZENE 770
TCE 15
LICR 7.2E-5
HI 1.1
CONSTITUENT
CONCENTRATION
(μg/m3)
SAMPLE IDENTIFICATION
S:\AAA-Master Projects\Boulevard Realty Estate Advisors (BOU)\BOU-007 Yorkshire Dr Brownfields\EMP\Figures\Site Map and Sample Loc Map.dwg, FIG 4, 8/14/2019 5:00:00 PM, nhotzelt

Table
Table 1 Summary of Sub-Slab Vapor and Soil Gas Analytical Data Yorkshire DriveYorkshire Drive and South Tryon StreetCharlotte, NCBrownfields Project No. 22033-18-060H&H Job No. NVR-008Sample IDSG-1 SG-2 SG-3 SG-4 SG-5 SG-6 SS-2Date9/21/2018 9/21/2018 9/21/2018 9/21/2018 9/21/2018 9/21/2018 9/21/2018Depth (ft bgs)666555-- ----VOCs (TO-15) µg/m3Acetone<490120 1,200<66 <16 <6.649 57 130 220,000 2,700,000Benzene1,100 180 770 560 44025 2.0 1.8 4.7 120 1,6002-Butanone (MEK)<3318 J 180 J 41 J 110<0.4432 37 5.4 J 35,000 440,000Carbon Disulfide<16150 V-06 600 V-06 160 150 L-05 18 L-05<0.21 <0.21 <0.214,900 61,000Chloroform<27 <0.91 <3.6 <3.6 <0.912.4 1.0<0.36 <0.3641 530Cyclohexane<37 <1.271<4.984<0.49 <0.49 <0.49 <0.4942,000 530,000Dichlorodifluoromethane<322.3 J<4.3 <4.3 <1.16.6<0.43 <0.43 <0.43700 8,8001,1-Dichloroethene<23 <0.78 <3.1 <3.1 <0.78 <0.311.6<0.31 <0.311,400 18,000cis-1,2-Dichloroethene<2436 99 30 79<0.321,600 1,300<0.32NS NStrans-1,2-Dichloroethene<242.6<3.2 <3.2 <0.79 <0.328.9 7.5<0.32NS NSEthanol<500 <17 <67 <67 <17 <6.7130 130 280 NS NSEthylbenzene1,600220 431,400 40036<0.50 <0.502.7 370 4,9004-Ethyltoluene 460 67 23 420 110 8.0<0.60 <0.60 <0.60NS NSn-Heptane 660 100 560 170 530 10<0.48 <0.487.3 2,800 35,000n-Hexane 250 J 81 530 230 J 640 L-05 10 J<1.2 <1.213 J 4,900 61,000Isopropanol<45 <1.5 <6.0 <6.013 J<0.6028 33 20 1,400 18,000Methyl tert-Butyl Ether (MTBE)<27 <0.90 <3.6 <3.6420<0.36 <0.36 <0.36 <0.363,600 470,000Methylene Chloride<63 <2.1 <8.4 <8.4 <2.1 <0.841.5 J 2.1 J<0.844,200 53,000Naphthalene<60 <2.0 <8.0 <8.0 <2.0 V-058.2 V-05<0.80 V-05 <0.80 V-054.2 21 260Propylene 590 J 320 2,200<3.42,200 21<0.34 <0.34 <0.3421,000 260,000Tetrachloroethene4002811 J3919164,3003,5007.32803,500Toluene13,000 1,800 1,900 7,000 3,300 2708.5303135,000440,0001,1,1-Trichloroethane<31<1.0<4.1<4.1<1.039<0.41 <0.41 <0.4135,000440,000Trichloroethene<333.115<4.36.23.7410370<0.4314 180Trichlorofluoromethane<49 <1.6 <6.5 <6.572 2,400 1.5 J 1.2 J 1.3 J NS NS1,2,4-Trimethylbenzene1,100170<6.3930270 16<0.63 <0.63 <0.63420 5,3001,3,5-Trimethylbenzene 280 41<6.2240 75 5.1<0.62 <0.621.5 420 5,300Vinyl Acetate2,00013 J 100 J 390 420<0.34 <0.34 <0.34 <0.341,400 18,000Vinyl Chloride<244.7 34<3.2 <0.81 <0.326.0 4.5<0.3256 2,800m&p-Xylene5,900 860685,100 1,500120<1.00 <1.009.8 700 8,800o-Xylene1,700240<5.41,500410 32<0.541.8 3.7 700 8,800Notes:1)North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Residential Sub-slab and Exterior Soil Gas Screening Levels (SGSLs) (February 2018)2)North Carolina DEQ DWM Non-Residential SGSLs (February 2018)Bold concentrations indicate concentration is above the DWM Residential SGSL (February 2018).Underlined indicate concentration is above the DWM Non-Residential SGSL (February 2018).Laboratory analytical methods are shown in parentheses.Only compounds detected in at least one sample shownµg/m3 = micrograms per cubic meter; NS = Not Specified; -- = Not ApplicableSS = sub-slab; SG = soil gas; ft bgs = feet below ground surfaceJ = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in an estimated concentration.L-05 = Laboratory fortified blank/laboratory control sample recovery is outside control limits. Reported value for this compound is likely to be biased on the high side.V-05= Continuing calibration did not meet method specifications and was biased on the low side for this compound.V-06 = Continuing calibration did not meet method specifications and was biased on the high side for this compound.Residential Soil Gas Screening Level(1)µg/m3Non-Residential Soil Gas Screening Level(2) µg/m3SS-1 / DUP-SG9/21/2018S:\AAA‐Master Projects\Boulevard Real Estate Advisors\BOU‐007 Yorkshire Dr Brownfields\Brownfields Assessment\Tables\DRAFT Data Tables 10.8.1812/21/2018Table 4 (Page 1 of 1)Hart & Hickman, PC

Attachment 1
Vapor Intrusion Mitigation Plan – Sheets VM-1 through VM-4

VIMS FAN AND EXHAUST WITHIN ATTIC (TYPICAL)9
VM1 NTS
VARMIT SCREEN AND VENT CAP (RAIN CAP)
FLASHING
ATTIC SPACE
4"X3" PVC REDUCER
ROOFTOP
SOLID TO SLOTTED 3" SCH 40
PVC PIPE TRANSITION (SLIP COUPLING
OR THREADED JOINT)
SINGLE OR DOUBLE STUD
SEPARATION WALL
VAPOR LINER
BENEATH THICKENED SLAB
BASE COARSE
(SEE SPECIFICATION #1)
VIMS PIPING AT THICKENED SLAB
NTS
SOLID 3" SCH 40 PVC
VAPOR LINER PENETRATION SEALED
TO PIPE PER MANUFACTURER
INSTRUCTIONSPROVIDE PIPE SUPPORT TO PREVENT LOW POINT
IN SOLID SECTION OF PIPE. MAINTAIN MINIMUM
1% SLOPE TOWARD SLOTTED SECTIONS OF PIPE.
(SEE SPECIFICATION #2)
VIMS RISER AT VERTICAL SLAB PENETRATION7
VM1 NTS
5
VM1
SUBBASE
ELECTRIC FAN (RADONAWAY RP-145
OR APPROVED EQUIVALENT)
ELECTRICAL OUTLET (120V AC)
3" SCH 40 PVC RISER
INSTALL MITIGATION SYSTEM ALARM IN AN
ACCESSIBLE LOCATION PER THE
MANUFACTURER INSTRUCTIONS. SEE
SPECIFICATION #10
BRICK OR HOUSE SIDING
EXTERNAL WALL (NOT
PRESENT AT ALL LOCATIONS)
STUD WALL
BASE COARSE
(SEE SPECIFICATION #1)
VAPOR LINER SEALED TO PIPE AND
CONCRETE PER MANUFACTURER
INSTRUCTIONS.
SUBBASE
FLOOR SYSTEM SEE FRAMING PLANS
RUN RISER PIPE TO
ROOF (SEE DETAIL #9)
INSIDE (OCCUPIED SPACE)
OUTSIDE
3" SOLID SCH 40 PVC
3" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #3 & #5)
THE FAN SHALL BE POSITIONED WITHIN 2-FT OF THE
ROOFLINE (SEE SPECIFICATION #8) AND PIPE ON
DISCHARGE END OF FAN SHALL BE CONTINUOUS 3" OR
4" SCH 40 PVC PIPE WITH NO FITTINGS
VIMS VAPOR LINER AND BASE COURSE (TYP)1
BASE COARSE - CLEAN #57 STONE
MIN 4" THICK BENEATH VIMS VAPOR LINER
VAPOR LINER (SEE SPECIFICATION #1)
CONCRETE FLOOR SLAB
SUBBASE
NTSVM1
SECTION THROUGH TURNED DOWN SLAB AT DRIVEWAY4
NTSVM1
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURER INSTRUCTIONS.
GARAGE
DRIVEWAY
STUD WALL OR EXTERNAL WALL
(NOT PRESENT IN ALL LOCATIONS)
BASE COARSE
(SEE SPECIFICATION #1)
VIMS SLOTTED COLLECTION PIPE (TYP)2
3" SCH 40 THREADED FLUSH JOINT
SLOTTED PVC PIPE (0.020" SLOT WIDTH,
1/8" SLOT SPACING) SET WITHIN MIN 5" BASE COURSE
WITH MIN 1" BASE COARSE BENEATH AND ABOVE
SLOTTED PVC PIPE (SEE SPECIFICATION #1)
VAPOR LINER (SEE SPECIFICATION #1)
SUBBASE
NTSVM1
SECTION THROUGH EXTERIOR WALL
NTSVM1
BRICK OR HOUSE SIDING
EXTERNAL WALL (NOT
PRESENT AT ALL LOCATIONS)
STUD WALL
BASE COARSE
(SEE SPECIFICATION #1)
CONCRETE FLOOR SLAB
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURER INSTRUCTIONS.
SUBBASE
SUBBASE
3
NTSVM1
FOOTINGS WITH STEP6
STUD WALL
BASE COARSE
(SEE SPECIFICATION #1)
3" SCH 40 PVC
3" SCH 40 PVC 45 DEGREE SWEEP 3" SLOTTED SCH 40 PVC
PIPE (SEE DETAIL 2)
PROVIDE PIPE SUPPORT TO PREVENT LOW POINT
IN SOLID SECTION OF PIPE. MAINTAIN MINIMUM
1% SLOPE TOWARD SLOTTED SECTIONS OF PIPE.
(SEE SPECIFICATION #2)VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER
INSTRUCTIONS
2" PVC 90 DEGREE
ELBOW
OCCUPIED SPACE
IRRIGATION BOX OR WATER
METER ENCLOSURE WITHLOCKABLE LID
SECURE PIPE WITHIN
ENCLOSURE TO PREVENTMOVEMENT
FABRIC FILTER SOCK OVER
END OF OPEN ENDED PIPE
OR VENT CAP
VAPOR LINER SEALED TO FOOTER PER
MANUFACTURER INSTRUCTIONS WITH
DOUBLE-SIDED TAPE ON EITHER TOP OR
SIDE OF FOOTER
AT AREAS WITH MEASURINGPOINTS, VAPOR LINER SHALL
BE EXTENDED BELOW PIPE
AND AND SHALL BE SEALED
TO PIPE PENETRATION AND
CONCRETE PER
MANUFACTURER
INSTRUCTIONS
VACUUM MEASURING POINT8
VM1 NTS
SOUTH TRYON AND YORKSHIRE DRIVECHARLOTTE, NORTH CAROLINASOUTH TRYON TOWNHOMESRYAN 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 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONAL APPROVAL / SEAL
H&H NO. NVR-008
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
SECTION
DETAILS
AUGUST 12, 2020
VM-1
REVISION 1
RISER PIPE SHALL BE PROPERLY SECURED USING PIPE
STRAPS, BRACKETS, OR SIMILAR TO PREVENT
MOVEMENT (SEE SPECIFICATION #8). AT LEAST ONE
PIPE SUPPORT SHALL BE LOCATED ON DISCHARGE SIDE
OF FAN.
FAN AND RISER PIPE SHALL BE PROPERLY SECURED
USING PIPE STRAPS, BRACKETS, OR SIMILAR TO
PREVENT MOVEMENT (SEE SPECIFICATION #8)
08/12/20
ISSUED FOR CONSTRUCTION
\\hhfs01\MasterFiles\AAA-Master Projects\NVR, Inc\NVR-008 Master VMP\VMS\Figures\VMP Figures.dwg
VAPOR INTRUSION MITIGATION SYSTEM (VIMS) SPECIFICATIONS
1.THIS VAPOR INTRUSION MITIGATION PLAN IS INTENDED TO BE USED FOR DIRECTION OF VIMS COMPONENT INSTALLATION ONLY AND IS NOT INTENDED TO GUIDE
CONSTRUCTION OF STRUCTURAL COMPONENTS NOT RELATED TO THE VIMS. CONSTRUCTION CONTRACTOR SHALL VERIFY CONSISTENCY OF VIMS DETAILS WITH
APPLICABLE STRUCTURAL, ARCHITECTURAL, MECHANICAL, AND PLUMBING PLANS AND RESOLVE INCONSISTENCIES WITH THE DESIGN ENGINEER PRIOR TO VIMS
INSTALLATION.
2.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL USE "LOW OR NO VOC" (INCLUDING NO PCE OR TCE) PRODUCTS AND MATERIALS, WHEN
POSSIBLE. THE CONSTRUCTION CONTRACTOR AND SUB-CONTRACTORS SHALL PROVIDE SAFETY DATA SHEETS (SDS) TO THE ENGINEER FOR PRODUCTS AND
MATERIALS USED DURING CONSTRUCTION.
3.VIMS VAPOR LINER SHALL BE VAPORBLOCK PLUS 20 VAPOR BARRIER MANUFACTURED BY RAVEN INDUSTRIES (OR, EQUIVALENT ALTERNATIVE VAPOR LINER
APPROVED BY THE ENGINEER AND NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY (DEQ); I.E., DRAGO WRAP 20-MIL VAPOR INTRUSION BARRIER
MANUFACTURED BY STEGO INDUSTRIES LLC).
THE VAPOR LINER SHALL BE INSTALLED AS SPECIFIED HEREIN AND PER MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS LINER BELOW
GROUND FLOOR SLABS. A BASE COURSE CONSISTING OF CLEAN #57 STONE (OR SIMILAR HIGH PERMEABILITY STONE APPROVED BY THE ENGINEER) SHALL BE
INSTALLED BENEATH THE VIMS VAPOR LINE. IN AREAS AROUND THE SUB-SLAB PIPING, THE BASE COURSE LAYER MUST BE THICK ENOUGH TO COVER THE SUB-SLAB
PIPING WITH A MINIMUM 1-INCH LAYER ABOVE AND BELOW THE PIPING. IN AREAS WITHOUT PIPING, THE BASE COURSE SHOULD BE A MINIMUM OF 4-INCHES THICK.
THE BUILDER CAN ELECT TO INSTALL A GEOTEXTILE LAYER BETWEEN THE SUB-SURFACE SOIL AND CLEAN #57 STONE. IF A GEOTEXTILE LAYER IS USED, IT SHALL BE
MIRAFI FW500, OR SIMILAR.
4.ALL PENETRATIONS SHALL BE SEALED ACCORDING TO VAPOR LINER MANUFACTURER INSTALLATION INSTRUCTIONS AS FOUND IN THE MANUFACTURER
INSTALLATION GUIDELINES. IF VAPORBLOCK PLUS 20 IS USED, SMALL PUNCTURE HOLES SHALL BE SEALED WITH THE VAPORSEALTM TAPE OR POUR-N-SEALTM AND
LARGER HOLES, TEARS, OR DAMAGE SHALL BE REPAIRED USING A PATCH THAT OVERLAPS THE DAMAGED AREA AND THEN SHALL BE TAPED ALONG THE SEAMS. IN
AREAS WHERE UTILITY PENETRATIONS (I.E. PIPING, DUCTS, ETC) ARE PRESENT AND THE USE OF TAPING IS NOT PRACTICAL OR DEEMS AS "INEFFECTIVE" BY THE
DESIGN ENGINEER, POUR-N-SEALTM SHALL BE POURED INTO FORM TO PATCH THE PENETRATION WITH AN AIR-TIGHT SEAL..
5.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL AVOID THE USE OF TEMPORARY FORM BOARDS THAT PENETRATE THE VAPOR LINER WHERE
POSSIBLE. IF TEMPORARY FORM BOARDS ARE USED, THE SIZE AND NUMBER OF PENETRATIONS THROUGH THE VAPOR LINER SHALL BE LIMITED AND SMALL
DIAMETER STAKES (I.E. SOLID METAL STAKES) SHALL BE USED. IN ALL CASES, AS FORM BOARDS ARE REMOVED, THE CONTRACTOR OR SUB-CONTRACTORS SHALL
SEAL ALL PENETRATIONS IN ACCORDANCE WITH VAPOR LINER MANUFACTURER INSTALLATION INSTRUCTIONS.
6.VIMS BELOW AND ABOVE GRADE PIPING SHALL NOT BE TRAPPED AND SHALL BE SLOPED A MINIMUM OF 18 UNIT VERTICAL IN 12 UNITS HORIZONTAL (1% SLOPE)
TO GRAVITY DRAIN. SOLID SECTIONS OF HORIZONTAL COLLECTION PIPE SHALL BE SUPPORTED TO PREVENT PIPE SAG OR LOW POINT AND MAINTAIN 1% SLOPE
TOWARD SLOTTED SECTIONS TO DRAIN CONDENSATION. HORIZONTAL COLLECTION PIPE SHALL CONSIST OF 3" SCH 40 PVC (OR OTHERWISE NOTED IN THE
DRAWINGS). SUB-SLAB SLOTTED VAPOR COLLECTION PIPE SHALL BE THREADED FLUSH JOINT OR GLUE JOINT 3" SCH 40 PVC PIPE WITH 0.020" SLOT WIDTH AND 18"
SLOT SPACING. AN ALTERNATE SLOT PATTERN WITH SIMILAR OPEN AREA PER FT OF PIPE MAY BE USED WITH APPROVAL BY ENGINEER.
7.3" PVC RISER DUCT PIPING SHALL BE INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT WITH ELECTRIC
FAN (SEE DETAIL #9). ABOVE-SLAB RISER DUCT PIPE RUNS BETWEEN THE SLAB PENETRATION AND THE ROOFTOP EXHAUST DISCHARGE SHALL BE INSTALLED PER
APPLICABLE BUILDING CODE AND AS SPECIFIED IN THE CONSTRUCTION DOCUMENTS AND DRAWINGS.
8. 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. A RADONAWAY RP-145 VENTILATOR FAN (OR APPROVED ALTERNATE) SHALL BE INSTALLED WITHIN THE ATTIC SPACE AT THE DISCHARGE END OF EACH
RISER DUCT PIPE. A 4" X 3" PVC ADAPTOR COUPLING SHALL BE INSTALLED AT THE DISCHARGE END OF THE 3" RISER DUCT PIPE AND THE FAN SHALL BE SECURED
TO THE PVC RISER IN A VERTICAL ORIENTATION. A CONTINUOUS 4" PVC DISCHARGE PIPE SHALL EXTEND FROM THE FAN VERTICALLY UPWARDS THROUGH THE
ROOF. EXHAUST DISCHARGE LOCATIONS SHALL BE A MINIMUM OF 10 FT FROM ANY OPERABLE OPENING OR AIR INTAKE INTO THE BUILDING. FAN LOCATIONS ON THE
ROOFTOP DEPICTED IN THE VAPOR MITIGATION PLAN MAY BE REPOSITIONED AS LONG AS THE NEW POSITION MEETS THE REQUIREMENTS PRESENTED ABOVE. THE
FAN AND PIPING WITHIN THE ATTIC SHALL BE PROPERLY SECURED (I.E STRAPS, BRACES) TO PREVENT MOVEMENT OF THE FAN OR CONNECTED PIPING DURING FAN
OPERATION. IN ADDITION, THE FAN(S) IN THE ATTIC SPACE SHALL BE ACCESSIBLE FOR MAINTENANCE PURPOSES. AN ELECTRICAL OUTLET (120V, 60Hz AC
REQUIRED) SHALL BE INSTALLED NEAR THE FAN LOCATION TO POWER THE ELECTRIC FANS. ALL WIRING AND ELECTRICAL TO BE INSTALLED WITH APPLICABLE
ELECTRICAL CODES.
9.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 HOA". THE VAPOR FAN SHALL BE LABELED WITH "VAPOR MITIGATION SYSTEM - CONTACT HOA IF FAN IS NOT OPERATING OR
DAMAGED". LABELS SHALL ALSO BE FIXED TO THE ELECTRIC VENTILATOR FANS IN AN ACCESSIBLE LOCATION IN THE ATTIC.
10. INSTALL MITIGATION SYSTEM VACUUM ALARM (RADONAWAY MITIGATION IIA ALARM, OR EQUIVALENT ALARM AS APPROVED BY THE ENGINEER) IN ATTIC SPACE
NEAR THE FAN IN AN ACCESSIBLE LOCATION. THE ALARM SHALL BE INSTALLED ON THE RISER PIPE BELOW THE SYSTEM FAN. A NOTE NEXT TO THE RED INDICATOR
LIGHT SHALL READ "VAPOR MITIGATION SYSTEM ALARM - IF ALARM IS ACTIVATED, CONTACT THE HOA", OR SIMILAR.
11. INSPECTIONS: INSPECTIONS OF EACH COMPONENT OF THE VIMS SHALL BE CONDUCTED BY THE ENGINEER, OR ENGINEER'S DESIGNEE, TO CONFIRM VIMS
COMPONENTS ARE INSTALLED PER THE APPROVED DESIGN. THE REQUIRED INSPECTIONS INCLUDE: (1) INSPECTION OF SUB-SLAB PIPING LAYOUT AND GRAVEL
PLACEMENT PRIOR TO INSTALLING VAPOR LINER; (2) INSPECTION OF VAPOR LINER PRIOR TO POURING CONCRETE; (3) INSPECTION OF ABOVE-GRADE PIPING
LAYOUT; AND (4) INSPECTION OF FAN, VENT PIPE CONNECTIONS, AND ALARM. THE CONSTRUCTION CONTRACTOR(S) SHALL COORDINATE WITH THE ENGINEER TO
PERFORM THE REQUIRED INSPECTIONS. DEQ WILL BE CONTACTED 48-HOURS PRIOR TO THE INSPECTION BEING CONDUCTED. FIELD NOTES, PHOTOGRAPHS, AND
ANY ADDITIONAL INSPECTION DOCUMENTATION WILL BE INCLUDED IN THE FINAL DELIVERABLE TO DEQ.
GARAGE OR BACK SIDE OF UNIT
FRONT OF UNITS
MEASURING POINT LAYOUT IN BUILDINGS CONTAINING 5 OR 6
UNITS. INTERIOR UNIT MEASURING POINT LOCATIONS SHALL BE
IN THE FRONT SIDE OF UNIT. END UNIT MEASURING POINTS
SHALL BE IN THE GARAGE SPACE OR BACK SIDE OF UNIT.
VACUUM MEASURING POINT LAYOUT - 5 OR 6 CONNECTED UNITS10A
VM1A NTS
PERMANENT VACUUM MEASURING
POINT - SEE DETAIL 8 ON SHEET VM-1
LEGEND FOR DETAILS 10A & 10B
GARAGE OR BACK SIDE OF UNIT
FRONT OF UNITS
MEASURING POINT LAYOUT IN BUILDINGS CONTAINING 8 OR 9
UNITS. INTERIOR UNIT MEASURING POINT LOCATIONS SHALL BE
IN THE FRONT SIDE OF UNIT. END UNIT MEASURING POINTS
SHALL BE IN THE GARAGE SPACE OR BACK SIDE OF UNIT.
VACUUM MEASURING POINT LAYOUT - 8 OR 9 CONNECTED UNITS10B
VM1A NTS
PERMANENT VACUUM MEASURING POINT -
SEE DETAIL 8 ON SHEET VM-1 - PROPOSED
SUB-SLAB SAMPLE LOCATION
SOUTH TRYON AND YORKSHIRE DRIVECHARLOTTE, NORTH CAROLINASOUTH TRYON TOWNHOMESRYAN 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
H&H NO. NVR-008
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
SPECIFICATIONS
AUGUST 12, 2020
VM-1A
REVISION 1
08/12/20
ISSUED FOR CONSTRUCTION
\\hhfs01\MasterFiles\AAA-Master Projects\NVR, Inc\NVR-008 Master VMP\VMS\Figures\VMP Figures.dwg
1
VM1
1
VM1
2
VM1
2
VM1
5
VM1
3
VM1
4
VM1
4
VM1
7/9
VM1
7/9
VM1
8
VM1
8
VM1
6
VM1
6
VM1
6
VM1
6
VM1
6
VM1
5
VM1
3
VM1
5
VM1
5
VM1
5
VM1
5
VM1
LEGEND
EXTENT OF VAPOR BARRIER - SEE SPECIFICATION #1 ON SHEET VM-1
3" SCH 40 PVC SLOTTED PIPE (INSTALL 3" VENT CAP AT END OF SLOTTED SECTIONS)
3" SCH 40 PVC SOLID PIPE
3" SCH 40 PVC SLOTTED ADJACENT UNIT CONNECTOR PIPE (SOLID THROUGH THICKENED
SLABS).
VERTICAL RISER (3" SCH. 40 PVC) AND FAN (REFER TO DETAIL #8 FOR VENTILATOR FAN
SET-UP)
VACUUM MEASURING POINT IF LAYOUT IS END UNIT (2" SCH 40 PVC WITH OPEN END
PROTECTED WITH FABRIC FILTER SOCK, OR SIMILAR)
THICKENED SLAB AT LOAD BEARING WALL
THICKENED SLAB STEP AT GARAGE STEP DOWN
NOTES:
1.LAYOUTS FOR GIH OPTION ARE SHOWN. THIS VIMS SHEET SHALL ONLY APPLY TO THIS
LAYOUT OPTION. SEE SHEETS VM-3 AND VM-4 FOR LAYOUTS OF GIT AND GIZ UNITS.
2.3" SCH 40 PVC SLOTTED ADJACENT UNIT CONNECTOR PIPE IS INTENDED TO CONNECT VENT
PIPE FROM ONE UNIT TO THE ADJACENT INTERIOR UNIT. FOR END UNITS, DO NOT INSTALL
ADJACENT UNIT CONNECTOR PIPE ALONG THE EXTERIOR END WALL.
3.ONE VACUUM MEASURING POINT SHALL BE INSTALLED PER UNIT. IF THE UNIT IS AN END
UNIT, THEN VACUUM MEASURING POINT SHALL BE INSTALLED ON THE BACKSIDE OF THE
UNIT. IF THE UNITS ARE INTERIOR UNITS, THEN THE VACUUM MEASURING POINT SHALL BE
INSTALLED ON THE FRONT SIDE OF THE UNIT. REFER TO DETAIL 10A AND 10B ON SHEET
VM-1A.
4.POSITION INTAKE OF VACUUM MEASURING POINT A MINIMUM OF 5-FT FROM ANY EXTERIOR
TURNED DOWN SLAB.
5.POSITION SLOTTED SUB-SLAB COLLECTION PIPE A MINIMUM OF 5-FT FROM ANY EXTERIOR
TURNED DOWN SLAB.
6.GROUND FLOOR LEVEL OF EACH BUILDING SHOWN. REFER TO STRUCTURAL AND
ARCHITECTURAL DRAWINGS FOR FINAL BUILDING LAYOUT. THIS VIMS LAYOUT IS FOR GIT
OPTION UNITS.
7.REFER TO SPECIFICATIONS 1 THROUGH 11 AND SECTION DETAILS ON SHEETS VM-1 AND
VM-1A.
8.EACH UNIT IS APPROXIMATELY 640 SQ FT.
GIH OPTIONGIH OPTION SOUTH TRYON AND YORKSHIRE DRIVECHARLOTTE, NORTH CAROLINASOUTH TRYON TOWNHOMESRYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONAL APPROVAL / SEAL
H&H NO. NVR-008
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
GIH OPTION
AUGUST 12, 2020
VM-2
REVISION 1
ISSUED FOR CONSTRUCTION
08/12/20
\\hhfs01\MasterFiles\AAA-Master Projects\NVR, Inc\NVR-008 Master VMP\VMS\Figures\VMP Figures.dwg
1
VM1 1
VM1
1
VM1
1
VM1
2
VM1
2
VM1
2
VM1
2
VM1
3
VM1
3
VM1
3
VM1
3
VM1
4
VM1
4
VM1
4
VM14
VM1
7/9
VM1 7/9
VM1
7/9
VM1 7/9
VM1
8
VM1
8
VM1
8
VM1
8
VM1
6
VM1
6
VM1
6
VM1 6
VM1
6
VM1
6
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6
VM16
VM1 5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
5
VM1
LEGEND
EXTENT OF VAPOR BARRIER - SEE SPECIFICATION #1 ON SHEET VM-1
3" SCH 40 PVC SLOTTED PIPE (INSTALL 3" VENT CAP AT ENDS OF SLOTTED SECTIONS)
3" SCH 40 PVC SOLID PIPE
3" SCH 40 PVC SLOTTED ADJACENT UNIT CONNECTOR PIPE (SOLID THROUGH THICKENED
SLABS).
VERTICAL RISER (3" SCH. 40 PVC) AND FAN (REFER TO DETAIL #8 FOR VENTILATOR FAN
SET-UP)
VACUUM MEASURING POINT (2" SCH 40 PVC WITH OPEN END PROTECTED WITH FABRIC
FILTER SOCK)
THICKENED SLAB AT LOAD BEARING WALL
THICKENED SLAB STEP AT GARAGE STEP DOWN
NOTES:
1.LAYOUTS FOR GIT OPTION ARE SHOWN. THIS VIMS SHEET SHALL ONLY APPLY TO THIS LAYOUT OPTION. SEE SHEETS VM-2 AND VM-4 FOR
LAYOUTS OF GIH AND GIZ UNITS.
2.3" SCH 40 PVC SLOTTED ADJACENT UNIT CONNECTOR PIPE IS INTENDED TO CONNECT VENT PIPE FROM ONE UNIT TO THE ADJACENT INTERIOR
UNIT. FOR END UNITS, DO NOT INSTALL ADJACENT UNIT CONNECTOR PIPE ALONG THE EXTERIOR END WALL.
3.ONE VACUUM MEASURING POINT SHALL BE INSTALLED PER UNIT. IF THE UNIT IS AN END UNIT, THEN VACUUM MEASURING POINT SHALL BE
INSTALLED ON THE GARAGE SIDE OF THE UNIT. IF THE UNITS ARE INTERIOR UNITS, THEN THE VACUUM MEASURING POINT SHALL BE INSTALLED
WITHIN THE LIVING AREA. REFER TO DETAILS 10A & 10B ON SHEET VM-1A.
4.POSITION INTAKE OF VACUUM MEASURING POINT A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN SLAB.
5.POSITION SUB-SLAB COLLECTION PIPE A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN SLAB.
6.GROUND FLOOR LEVEL OF EACH BUILDING SHOWN. REFER TO STRUCTURAL AND ARCHITECTURAL DRAWINGS FOR FINAL BUILDING LAYOUT. THIS
VIMS LAYOUT IS FOR GIT OPTION UNITS.
7.REFER TO SPECIFICATIONS 1 THROUGH 11 AND SECTION DETAILS ON SHEETS VM-1 AND VM-1A.
8.EACH UNIT IS APPROXIMATELY 640 SQ FT.
GIT OPTIONGIT OPTIONGIT OPTIONGIT OPTION SOUTH TRYON AND YORKSHIRE DRIVECHARLOTTE, NORTH CAROLINASOUTH TRYON TOWNHOMESRYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
PROFESSIONAL APPROVAL / SEAL
H&H NO. NVR-008
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
GIT OPTION
AUGUST 12, 2020
VM-3
REVISION 1
ISSUED FOR CONSTRUCTION
08/12/20
\\hhfs01\MasterFiles\AAA-Master Projects\NVR, Inc\NVR-008 Master VMP\VMS\Figures\VMP Figures.dwg
1
VM1
1
VM1
1
VM1
1
VM1
2
VM1
2
VM1 2
VM1
2
VM1 3
VM1
5
VM1
3
VM1
3
VM1
4
VM1
4
VM1
4
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4
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7/9
VM17/9
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VM15
VM1
5
VM1
5
VM1
5
VM1
3
VM1
5
VM1
5
VM1 5
VM1
5
VM1
LEGEND
EXTENT OF VAPOR BARRIER - SEE SPECIFICATION #1 ON SHEET VM-1
3" SCH 40 PVC SLOTTED PIPE (INSTALL 3" VENT CAP AT ENDS OF SLOTTED SECTIONS)
3" SCH 40 PVC SOLID PIPE
3" SCH 40 PVC SLOTTED ADJACENT UNIT CONNECTOR PIPE (SOLID THROUGH THICKENED
SLABS).
VERTICAL RISER (3" SCH. 40 PVC) AND FAN (REFER TO DETAIL #8 FOR VENTILATOR FAN
SET-UP)
VACUUM MEASURING POINT (2" SCH 40 PVC WITH OPEN END PROTECTED WITH FABRIC
FILTER SOCK)
THICKENED SLAB AT LOAD BEARING WALL
NOTES:
1.LAYOUTS FOR GIZ OPTION ARE SHOWN. THIS VIMS SHEET SHALL ONLY APPLY TO THIS LAYOUT OPTION. SEE SHEETS VM-2 AND VM-3 FOR
LAYOUTS OF GIT AND GIH UNITS.
2.3" SCH 40 PVC SLOTTED ADJACENT UNIT CONNECTOR PIPE IS INTENDED TO CONNECT VENT PIPE FROM ONE UNIT TO THE ADJACENT INTERIOR
UNIT. FOR END UNITS, DO NOT INSTALL ADJACENT UNIT CONNECTOR PIPE ALONG THE EXTERIOR END WALL.
3.ONE VACUUM MEASURING POINT SHALL BE INSTALLED PER UNIT. IF THE UNIT IS AN END UNIT, THEN VACUUM MEASURING POINT SHALL BE
INSTALLED ON THE BACKSIDE OF THE UNIT. IF THE UNITS ARE INTERIOR UNITS, THEN THE VACUUM MEASURING POINT SHALL BE INSTALLED ON
THE FRONT SIDE OF THE UNIT. REFER TO DETAILS 10A & 10B ON SHEET VM-1A.
4.POSITION INTAKE OF VACUUM MEASURING POINT A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN SLAB.
5.POSITION SUB-SLAB COLLECTION PIPE A MINIMUM OF 5-FT FROM ANY EXTERIOR TURNED DOWN SLAB.
6.GROUND FLOOR LEVEL OF EACH BUILDING SHOWN. REFER TO STRUCTURAL AND ARCHITECTURAL DRAWINGS FOR FINAL BUILDING LAYOUT. THIS
VIMS LAYOUT IS FOR GIT OPTION UNITS.
7.REFER TO SPECIFICATIONS 1 THROUGH 11 AND SECTION DETAILS ON SHEETS VM-1 AND VM-1A.
8.EACH UNIT IS APPROXIMATELY 640 SQ FT.
GIZ OPTION GIZ OPTION GIZ OPTION GIZ OPTION SOUTH TRYON AND YORKSHIRE DRIVECHARLOTTE, NORTH CAROLINASOUTH TRYON TOWNHOMESRYAN HOMES, AN NVR,
INC COMPANY
10710 SIKES PLACE
SUITE 200
CHARLOTTE, NORTH
CAROLINA 28277
VAPOR MITIGATION
PLAN PREPARED BY
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 Geology
PROFESSIONAL APPROVAL / SEAL
H&H NO. NVR-008
VAPOR
INTRUSION
MITIGATION
SYSTEM PLAN
GIZ OPTION
AUGUST 12, 2020
VM-4
REVISION 1
ISSUED FOR CONSTRUCTION
08/12/20
\\hhfs01\MasterFiles\AAA-Master Projects\NVR, Inc\NVR-008 Master VMP\VMS\Figures\VMP Figures.dwg

Attachment 2
Vapor Intrusion Mitigation System Product Specifications

INSTALLATION & OPERATING INSTRUCTIONS
Instruction P/N IN015 Rev E
FOR CHECKPOINT IIa TM P/N 28001-2 & 28001-3
RADON SYSTEM ALARM
INSTALLATION INSTRUCTIONS
(WALL MOUNTING)
Select a suitable wall location near a vertical section of the
suction pipe. The unit should be mounted about four or five
feet above the floor and as close to the suction pipe as
possible. Keep in mind that with the plug-in transformer
provided, the unit must also be within six feet of a 120V
receptacle. NOTE: The Checkpoint IIa is calibrated for
vertical mounting, horizontal mounting will affect
switchpoint calibration.
Drill two ¼” holes 4” apart horizontally where the unit is to
be mounted.
Install the two ¼” wall anchors provided.
Hang the CHECKPOINT IIa from the two mouting holes
located on the mounting bracket. Tighten the mounting
screws so the unit
fits snugly and
securely against the
wall.
Drill a 5/16” hole
into the side of the
vent pipe about 6”
higher than the top
of the unit.
Insert the vinyl
tubing provided
about 1” inside the
suction pipe.
Cut a suitable length of vinyl tubing and attach it to the
pressure switch connector on the CHECKPOINT IIa.
CALIBRATION AND OPERATION.
The CHECKPOINT IIa units are calibrated and sealed at the
factory to alarm when the vacuum pressure falls below the
factory setting and should not normally require field
calibration. Factory Settings are:
28001-2 -.25” WC Vacuum
28001-3 -.10” WC Vacuum
To Verify Operation:
With the exhaust fan off or the pressure tubing disconnected
and the CHECKPOINT IIa plugged in, both the red indicator
light and the audible alarm should be on.
Turn the fan system on or connect the pressure tubing to the
fan piping. The red light and the audible alarm should go off.
The green light should come on.
Now turn the fan off. The red light and audible alarm should
come on in about two or three seconds and the green light
should go out.
Manufactured by:
RadonAway
Ward Hill, MA
(978)-521-3703
WARRANTY INFORMATION
Subject to applicable consumer protection legislation,
RadonAway warrants that the CHECKPOINT IIa will be
free from defective material and workmanship for a period
of (1) year from the date of purchase. Warranty is
contingent on installation in accordance with the
instructions provided. This warranty does not apply where
repairs or alterations have been made or attempted by
others; or the unit has been abused or misused. Warranty
does not include damage in shipment unless the damage is
due to the negligence of RadonAway. All other warranties,
expressed or written, are not valid. To make a claim under
these limited warranties, you must return the defective
item to RadonAway with a copy of the purchase receipt.
RadonAway is not responsible for installation or removal
cost associated with this warranty. In no case is
RadonAway liable beyond the repair or replacement of the
defective product FOB RadonAway.
THERE ARE NO WARRANTIES WHICH EXTEND
BEYOND THE DESCRIPTION ON THE FACE
HEREOF. THERE IS NO WARRANTY OF
MERCHANTIBILITY. ALL OTHER WARRANTIES,
EXPRESSED OR WRITTEN, ARE NOT VALID.
For service under these warranties, contact RadonAway
for a Return Material Authorization (RMA) number and
shipping information. No returns can be accepted
without an RMA. If factory return is required, the
customer assumes all shipping costs to and from factory.
RP
Radon Mitigation Fan
All RadonAway® fans are specifically designed for radon
mitigation. RP Series Fans provide superb performance, run
ultra-quiet and are attractive. They are ideal for most sub-slab
radon mitigation systems.
Features
• NEW Stay-White™ housing
• Energy efficient
• RP140 - ENERGY STAR Most Efficient 2018
• Ultra-quiet operation
• Meets all electrical code requirements
• Water-hardened motorized impeller
• Seams sealed to inhibit radon leakage
(RP140 & RP145 double snap sealed)
• ETL Listed - for indoor or outdoor use
• Thermally protected motor
• Rated for commercial and residential use
For Further Information, Contact Your Radon Professional:
Rev B 0618
P/N 02051© 2018 RadonAway
Installs white, stays white
A
C
B
All RadonAway® inline radon fans are covered
by our 5-year, hassle-free warranty.
MODEL P/N FAN DUCT
DIAMETER WATTS RECOM. MAX. OP.
PRESSURE “WC
TYPICAL CFM vs. STATIC PRESSURE WC
0”.5”1.0”1.5”2.0”
RP140 28460 4”15-21 0.7 135 70 ---
RP145 28461 4”41-72 1.7 166 126 82 41 3
RP260 28462 6”47-65 1.3 251 157 70 --
RP265 28463 6”95-139 2.3 375 282 204 140 70
RP380*28208 8”96-138 2.0 531 415 268 139 41
ETL Listed
RP140 Only
*Currently not stay-white material.
Model A B C
RP140 4.5”9.7”8.5”
RP145 4.5”9.7”8.5”
RP260 6”11.75”8.6”
RP265 6”11.75”8.6”
RP380 8”13.41”10.53”
with U.S. and
imported parts.
IN095 Rev B 0718 13 Saber Way, Ward Hill, MA 01835 | radonaway.com
RP, GP, XP Pro Series
Installation Instructions
IN095 Rev B 0718 23 Saber Way Ward, Hill, MA 01835 | radonaway.com
Fan Installation & Operating Instructions
RP, GP, XP Series Fans
Please Read and Save These Instructions.
DO NOT CONNECT POWER SUPPLY UNTIL FAN IS COMPLETELY INSTALLED. MAKE SURE ELECTRICAL
SERVICE TO FAN IS LOCKED IN “OFF” POSITION. DISCONNECT POWER BEFORE SERVICING FAN.
1. WARNING! For General Ventilating Use Only. Do Not Use to Exhaust Hazardous, Corrosive or Explosive Materials,
Gases or Vapors. See Vapor Intrusion Application Note #AN001 for important information on VI Applications.
RadonAway.com/vapor-intrusion
2. NOTE: Fan is suitable for use with solid state speed controls; however, use of speed controls is not
generally recommended.
2. WARNING! Check voltage at the fan to insure it corresponds with nameplate.
3. WARNING! Normal operation of this device may affect the combustion airflow needed for safe operation of fuel
burning equipment. Check for possible backdraft conditions on all combustion devices after installation.
4. NOTICE! There are no user serviceable parts located inside the fan unit.
Do NOT attempt to open. Return unit to the factory. (See Warranty, p. 8, for details.)
5. WARNING! Do not leave fan unit installed on system piping without electrical power for more than 48 hours. Fan
failure could result from this non-operational storage.
6. WARNING! TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE
FOLLOWING:
a) Use this unit only in the manner intended by the manufacturer. If you have questions, contact the
manufacturer. (See p. 8.)
b) Before servicing or cleaning unit, switch power off at service panel and lock the service disconnecting
means to prevent power from being switched on accidentally. When the service disconnecting means
cannot be locked, securely fasten a prominent warning device, such as a tag, to the service panel.
c) Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable
codes and standards, including fire rated construction.
d) Sufficient air is needed for proper combustion and exhausting of gases through the flue (chimney) of fuel
burning equipment to prevent backdrafting. Follow the heating equipment manufacturers’ guidelines
and safety standards such as those published by any National Fire Protection Association, and the
American Society for Heating, Refrigerating and Air Conditioning Engineers (ASHRAE), and the local code
authorities.
e) When cutting or drilling into a wall or ceiling, do not damage electrical wiring and other hidden utilities.
f) Ducted fans must always be vented to outdoors.
g) If this unit is to be installed over a tub or shower, it must be marked as appropriate for the application and
be connected to a GFCI (Ground Fault Circuit Interrupter) protected branch circuit.
IN095 Rev B 0718 33 Saber Way, Ward Hill, MA 01835 | radonaway.com
1.0 SYSTEM DESIGN CONSIDERATIONS
1.1 INTRODUCTION
The RP, GP and XP Series Radon Fans are intended for use by trained, professional, certified/licensed radon
mitigators. The purpose of these instructions is to provide additional guidance for the most effective use of RP, GP
and XP Series Fans. These instructions should be considered supplemental to EPA/radon industry standard practices,
state and local building codes and regulations. In the event of a conflict, those codes, practices and regulations take
precedence over these instructions.
1.2 FAN SEALING
The RP, GP and XP Series Fans are factory sealed; no additional caulk or other materials are required to inhibit air
leakage.
1.3 ENVIRONMENTALS
The RP, GP and XP Series Fans are designed to perform year-round in all but the harshest climates without additional
concern for temperature or weather. For installations in an area of severe cold weather, please contact RadonAway for
assistance. When not in operation, the fan should be stored in an area where the temperature is never less than 32
degrees F or more than 100 degrees F.

1.4 ACOUSTICS
The RP, GP and XP Series Fans, when installed properly, operate with little or no noticeable noise to the building
occupants. The velocity of the outgoing air should be considered in the overall system design. In some cases the
“rushing” sound of the outlet air may be disturbing. In these instances, the use of a RadonAway Exhaust Muffler is
recommended.
(To ensure quiet operation of inline and remote fans, each fan shall be installed using sound attenuation techniques appropriate for the
installation. For bathroom and general ventilation applications, at least 8 feet of insulated flexible duct shall be installed between the exhaust or
supply grille(s) and the fan(s). RP, GP and XP Series Fans are not suitable for kitchen range hood remote ventilation applications.)
1.5 GROUND WATER
In the event that a temporary high water table results in water at or above slab level, water may be drawn into the
riser pipes, thus blocking air flow to the RP, GP and XP Series Fan. The lack of cooling air may result in the fan cycling
on and off as the internal temperature rises above the thermal cutoff. Should this condition arise, it is recommended
that the fan be turned off until the water recedes, allowing for return to normal operation.
1.6 SLAB COVERAGE
The RP, GP and XP Series Fans can provide coverage up to 2000+ sq. ft. per slab penetration. This will primarily
depend on the sub-slab material in any particular installation. In general, the tighter the material, the smaller the area
covered per penetration. Appropriate selection of the RP, GP and XP Series Fan best suited for the sub-slab material
can improve the slab coverage. The RP, GP and XP Series have a wide range of models to choose from to cover a
wide range of sub-slab materials. The RP140 and 145 are best suited for general purpose use. The RP 260 can be
used where additional airflow is required, and the RP265 and RP 380 are best suited for large slab, high airflow
applications. Additional suction points can be added as required. It is recommended that a small pit (5 to 10 gallons
in size) be created below the slab at each suction hole.
Fan Installation & Operating Instructions
RP Series
RP140 | P/N 28460
RP145 | P/N 28461
RP260 | P/N 28462
RP265 | P/N 28463
RP380 | P/N 28464
GP Series
GP201 | P/N 28465
GP301 | P/N 28466
GP401 | P/N 28467
GP501 | P/N 28468
XP Series
XP151 | P/N 28469
XP201 | P/N 28470

IN095 Rev B 0718 43 Saber Way Ward, Hill, MA 01835 | radonaway.com
1.7 CONDENSATION & DRAINAGE
Condensation is formed in the piping of a mitigation system when the air in the piping is chilled below its dew point.
This can occur at points where the system piping goes through unheated space such as an attic, garage or outside.
The system design must provide a means for water to drain back to a slab hole to remove the condensation. The RP,
GP and XP Series Fan MUST be mounted vertically plumb and level, with the outlet pointing up for proper drainage
through the fan. Avoid mounting the fan in any orientation that will allow water to accumulate inside the fan housing.
The RP, GP and XP Series Fans are NOT suitable for underground burial.
For RP, GP and XP Series Fan piping, the following table provides the minimum recommended pipe diameter and
pitch under several system conditions.
See p. 7 for detailed specifications.
Pipe
Diameter
Minimum Rise per Ft of Run*
@25 CFM @50 CFM @100 CFM
4”1/8”1/4”3/8”
3”1/4”3/8”1 1/2”
1.8 SYSTEM MONITOR & LABEL
A System Monitor, such as a manometer (P/N 50017) or audible alarm (P/N 28001-2, 28001-4 or 28421), is
required to notify the occupants of a fan system malfunction. A System Label (provided with Manometer P/N 50017)
with instructions for contacting the installing contractor for service and identifying the necessity for regular radon tests
to be conducted by the building occupants must be conspicuously placed in a location where the occupants frequent
and can see the label.
1.9 ELECTRICAL WIRING
The RP, GP and XP Series Fans operate on standard 120V, 60Hz AC. All wiring must be performed in accordance
with National Fire Protection (NFPA) National Electrical Code, Standard #70, current edition, for all commercial
and industrial work, and state and local building codes. All wiring must be performed by a qualified and licensed
electrician. Outdoor installations require the use of a UL Listed watertight conduit. Ensure that all exterior electrical
boxes are outdoor rated and properly sealed to prevent water penetration into the box. A means, such as a weep hole,
is recommended to drain the box.
1.10 SPEED CONTROLS
The RP, GP and XP Series Fans are rated for use with electronic speed controls; however, speed controls are generally
not recommended. If used, the recommended speed control is Pass & Seymour Solid State Speed Control (Cat. No.
94601-1).
RUNRISE
120 VAC
Common
Ground
CapacitorWhite
Black Brn
Brn/Wht
Green
Motor
RP, GP, XP Series Fan Wiring Diagram
IN095 Rev B 0718 53 Saber Way, Ward Hill, MA 01835 | radonaway.com
2.0 INSTALLATION
The RP, GP and XP Series Fans can be mounted indoors or outdoors. (It
is suggested that EPA and radon mitigation standards recommendations
be followed in choosing the fan location.) The GP fans have an integrated
mounting bracket; RP and XP Series Fans may be mounted directly on
the system piping or fastened to a supporting structure by means of an
optional mounting bracket.
The ducting from the fan to the outside of the building has a strong effect
on noise and fan energy use. Use the shortest, straightest duct routing
possible for best performance, and avoid installing the fan with smaller
ducts than recommended. Insulation around the ducts can reduce energy
loss and inhibit mold growth. Fans installed with existing ducts may not
achieve their rated airflow.
2.1 MOUNTING
Mount the RP, GP and XP Series Fan vertically with outlet up. Insure the unit is
plumb and level. When mounting directly on the system piping assure that the fan
does not contact any building surface to avoid vibration noise.
2.2 MOUNTING BRACKET (optional)
The RP and XP Series Fans may be optionally secured with the RadonAway P/N
25007 mounting bracket. Foam or rubber grommets may also be used between
the bracket and mounting surface for vibration isolation.
2.3 SYSTEM PIPING
Complete piping run, using flexible couplings as a means of disconnect for
servicing the unit and for vibration isolation. As the fan is typically outside of the
building thermal boundary and is venting to the outside, installation of insulation
around the fan is not required.
2.4 ELECTRICAL CONNECTION
Connect wiring with wire nuts provided, observing proper connections (See Section
1.9). Note that the fan is not intended for connection to rigid metal conduit.
2.5 VENT MUFFLER (optional)
Install the muffler assembly in the selected location in the outlet ducting. Solvent
weld all connections. The muffler is normally installed at the end of the vent pipe.
TYPICAL OUTDOOR INSTALLATION
TYPICAL INDOOR INSTALLATION
2.6 OPERATION CHECKS & ANNUAL SYSTEM MAINTENANCE
______ Verify all connections are tight and leak-free.
______ Ensure the RP, GP and XP Series Fan and all ducting are secure and vibration-free.
______ Verify system vacuum pressure with manometer. Insure vacuum pressure is within normal
operating range and less than the maximum recommended operating pressure.
(Based on sea-level operation, at higher altitudes reduce by about 4% per 1000 feet)
(Further reduce Maximum Operating Pressure by 10% for High Temperature environments.)
See Product Specifications. If this is exceeded, increase the number of suction points.

______ Verify Radon levels by testing to EPA Protocol and applicable testing standards.
IN095 Rev B 0718 63 Saber Way Ward, Hill, MA 01835 | radonaway.com
Typical CFM Vs. Static Pressure “WC
0”.5”1.0”1.5”1.75”2.0”
XP151 150 115 69 ---
XP201 112 95 70 40 --
Model Size Weight Inlet/Outlet
XP151 9.5”H x 8.5” Dia.6 lbs 4.5”OD (4.0” PVC Sched 40 size compatible)
XP201 9.5”H x 8.5” Dia.6 lbs 4.5” OD
Model Power Consumption
120VAC, 60Hz, 1.5 Amp Maximum
Maximum Recommended Operation Pressure*
(Sea Level Operation)**
XP151 45 - 60 watts 1.3” WC
XP201 45 - 66 watts 1.7” WC
*Reduce by 10% for High Temperature Operation **Reduce by 4% per 1000 ft. of altitude.
THE FOLLOWING CHARTS SHOW THE PERFORMANCE OF THE RP, GP and XP SERIES FANS
XP Series Product Specifications
Typical CFM Vs. Static Pressure “WC
Model 0”.25”.5”.75”1.0”1.25”1.5”1.75”2.0”
RP140 135 103 70 14 ----
RP145 166 146 126 104 82 61 41 21 3
RP260 251 209 157 117 70 26 ---
RP265 375 330 282 238 204 170 140 108 70
RP380 531 490 415 340 268 200 139 84 41
Model Size Weight Inlet/Outlet L.2
RP140 8.5”H x 9.7” Dia.5.5 lbs 4.5”OD (4.0” PVC Sched 40 size compatible)25
RP145 8.5”H x 9.7” Dia.5.5 lbs 4,5” OD 15
RP260 8.6”H x 11.75” Dia.5.5 lbs 6.0” OD 48
RP265 8.6”H x 11.75” Dia.6.5 lbs 6.0” OD 30
RP380 10.53”H x 13.41” Dia.11.5 lbs 8.0” OD 57
Model Power Consumption
120VAC, 60Hz, 1.5 Amp Maximum
Maximum Recommended Operation Pressure*
(Sea Level Operation)**
RP140 15 - 21 watts 0.7” WC
RP145 41 - 72 watts 1.7” WC
RP260 47-65 watts 1.3” WC
RP265 95 - 139 watts 2.3” WC
RP380 96 - 138 watts 2.0” WC
L.2 = Estimated Equivalent Length of Rigid Metal Ducting resulting in .2” WC pressure loss for Duct Size listed. Longer Equivalent Lengths
can be accommodated at Flows Lower than that at .2” WC pressure loss (see CFM Vs Static Pressure “WC Table).
*Reduce by 10% for High Temperature Operation **Reduce by 4% per 1000 ft. of altitude.
RP Series Product Specifications
IN095 Rev B 0718 73 Saber Way, Ward Hill, MA 01835 | radonaway.com
Typical CFM Vs. Static Pressure “WC
1.0”1.5”2.0”2.5”3.0”3.5”4.0”
GP201 54 42 11 ----
GP301 64 54 41 4 ---
GP401 -61 52 44 22 --
GP501 --66 58 50 27 4
Model Size Weight Inlet/Outlet
GP201 13”H x 12.5” Dia.12 lbs 3.5”OD (3.0” PVC Sched 40 size compatible)
GP301 13”H x 12.5” Dia.12 lbs 3.5” OD
GP401 13”H x 12.5” Dia.12 lbs 3.5” OD
GP501 13”H x 12.5” Dia.12 lbs 3.5” OD
Model Power Consumption
120VAC, 60Hz, 1.5 Amp Maximum
Maximum Recommended Operation Pressure*
(Sea Level Operation)**
GP201 31-65 watts 1.8” WC
GP301 56-100 watts 2.3” WC
GP401 62-128 watts 3.0” WC
GP501 68 - 146 watts 3.8” WC
*Reduce by 10% for High Temperature Operation **Reduce by 4% per 1000 ft. of altitude.
GP Series Product Specifications
Typical CFM Vs. Static Pressure “WC
Model0”.25”.5”.75”1.0”1.25”1.5”1.75”2.0”
RP1401351037014----
RP145166146126104826141213
RP2602512091571177026---
RP26537533028223820417014010870
RP3805314904153402682001398441
Model Recommended Duct PVC Pipe Mounting Thermal Cutout Insulation Class
RP140
3” or 4” Schedule
20/40 PVC
Mount on the duct pipe or with
optional mounting bracket.
For Ventilation: 4”, 6” or 8” Rigid
or Flexible Ducting.
130oC/266oF Class B Insulation
RP145 130oC/266oF
Class F InsulationRP260150oC/302oF
RP265 150oC/302oF
RP380 6” Schedule 20/40 PVC Pipe 150oC/302oF
XP151 3” or 4” Schedule
20/40 PVC
Fan may be mounted on the duct
pipe or with integral flanges.120oC/248oF Class B InsulationXP201
GP201
3” or 4” Schedule
20/40 PVC
Fan may be mounted on the duct
pipe or with integral flanges.120oC/248oF Class B InsulationGP301
GP401
GP501
RP, XP and GP Series Additional Specifications
Continuous Duty
3000 RPM
Thermally Protected
RP, GP Residential and Commercial
XP Residential Only
Rated for Indoor or Outdoor Use
IN095 Rev B 0718 83 Saber Way Ward, Hill, MA 01835 | radonaway.com
IMPORTANT INSTRUCTIONS TO INSTALLER
Inspect the RadonAway® RP, GP and XP Series Fan for shipping damage within 15 days of receipt. Notify
RadonAway of any damages immediately. RadonAway is not responsible for damages incurred during shipping.
However, for your benefit, RadonAway does insure shipments.
There are no user serviceable parts inside the fan. Do not attempt to open the housing. Return unit to factory. (See
Warranty below).
Install the RP, GP and XP Series Fan in accordance with all EPA, ANSI/AARST standard practices, and state and local
building codes and regulations.
Provide a copy of this instruction or comparable radon system and testing information to the building occupants
after completing system installation.
Warranty
RadonAway® warrants that the RP, GP (excluding GP500) and XP Series Fan (the “Fan”) will be free from defects in materials and
workmanship for a period of 12 months from the date of purchase or 18 months from the date of manufacture, whichever is sooner (the
“Warranty Term”).
RadonAway® will replace any fan which fails due to defects in materials or workmanship during the Warranty Term. This Warranty
is contingent on installation of the Fan in accordance with the instructions provided. This Warranty does not apply where any repairs
or alterations have been made or attempted by others, or if the unit has been abused or misused. Warranty does not cover damage in
shipment unless the damage is due to the negligence of RadonAway®.
The Fan must be returned (at Owner’s cost) to the RadonAway® factory. Any Fan returned to the factory will be discarded unless the
Owner provides specific instructions along with the Fan when it is returned regardless of whether or not the Fan is actually replaced
under this warranty. Proof of purchase must be supplied upon request for service under this Warranty.
5-YEAR EXTENDED WARRANTY WITH PROFESSIONAL INSTALLATION.
RadonAway® will extend the Warranty Term of the fan to 60 months (5 years) from date of purchase or 66 months from date of
manufacture, whichever is sooner, provided that the fan is installed by a professional radon mitigation contractor. Proof of purchase
and/or proof of professional installation may be required for service under this warranty. No extended warranty is offered outside the
Continental United States and Canada beyond the standard 12 months from the date of purchase or18 months from the date of
manufacture, whichever is sooner.
RadonAway® is not responsible for installation, removal or delivery costs associated with this Warranty.
LIMITATION OF WARRANTY
EXCEPT AS STATED ABOVE, THE RP, GP (excluding GP500) and XP SERIES FANS ARE PROVIDED WITHOUT WARRANTY OF ANY
KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULARPURPOSE.
IN NO EVENT SHALL RADONAWAY BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES ARISING OUT OF, OR RELATING TO, THE FAN OR THE PERFORMANCE THEREOF. RADONAWAY’S AGGREGATE
LIABILITY HEREUNDER SHALL NOT IN ANY EVENT EXCEED THE AMOUNT OF THE PURCHASE PRICE OF SAID PRODUCT. THE
SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY SHALL BE THE REPAIR OR REPLACEMENT OF THE PRODUCT, TO
THE EXTENT THE SAME DOES NOT MEET WITH RADONAWAY’S WARRANTY AS PROVIDED ABOVE.
For service under this Warranty, contact RadonAway for a Return Material Authorization (RMA) number and shipping information. No
returns can be accepted without an RMA. If factory return is required, the customer assumes all shipping costs, including insurance, to
and from factory.
RadonAway® 3 Saber Way
Ward Hill, MA 01835 USA TEL [phone]
FAX [phone]
Email to: [e-mail]
Record the following information for your records:
Serial Number: Purchase Date:
PRODUCT PART #
VaporBlock® Plus™ 20 ................................................................ VBP20
UNDER-SLAB VAPOR / GAS BARRIER
Under-Slab Vapor/Gas Retarder
© 2018 RAVEN INDUSTRIES INC. All rights reserved.
VAPORBLOCK® PLUS™VBP20
PRODUCT DESCRIPTION
VaporBlock® Plus™ is a seven-layer co-extruded barrier
made using high quality virgin-grade polyethylene and
EVOH resins to provide unmatched impact strength as well
as superior resistance to gas and moisture transmission.
VaporBlock® Plus™ 20 is more than 100 times less permeable
than typical high-performance polyethylene vapor retarders
against Methane, Radon, and other harmful VOCs. Tested and
verified for unsurpassed protection against BTEX, HS, TCE, PCE,
methane, radon, other toxic chemicals and odors.
VaporBlock® Plus™ 20 multi-layer gas barrier is manufactured
with the latest EVOH barrier technology to mitigate hazardous
vapor intrusion from damaging indoor air quality, and the safety
and health of building occupants. VBP20 is one of the most
effective underslab gas barriers in the building industry today
far exceeding ASTM E-1745 (Plastic Water Vapor Retarders
Used in Contact with Soil or Granular Fill Under Concrete Slabs)
Class A, B and C requirements. Available in a 20 (Class A) mil
thicknesses designed to meet the most stringent requirements.
VaporBlock® Plus™ 20 is produced within the strict guidelines
of our ISO 9001 Certified Management System.
PRODUCT USE
VaporBlock® Plus™ 20 resists gas and moisture migration
into the building envelop when properly installed to provide
protection from toxic/harmful chemicals. It can be installed as
part of a passive or active control system extending across the
entire building including floors, walls and crawl spaces. When
installed as a passive system it is recommended to also include
a ventilated system with sump(s) that could be converted to an
active control system with properly designed ventilation fans.
VaporBlock® Plus™ 20 works to protect your flooring and
other moisture-sensitive furnishings in the building’s interior
from moisture and water vapor migration, greatly reducing
condensation, mold and degradation.
SIZE & PACKAGING
VaporBlock® Plus™ 20 is available in 10’ x 150’ rolls to
maximize coverage. All rolls are folded on heavy-duty cores
for ease in handling and installation. Other custom sizes
with factory welded seams are available based on minimum
volume requirements. Installation instructions and ASTM E-1745
classifications accompany each roll.
APPLICATIONS
Radon Barrier
Methane Barrier
VOC Barrier
Brownfields Barrier
Vapor Intrusion Barrier
Under-Slab Vapor Retarder
Foundation Wall Vapor Retarder
VaporBlock® Plus™ is a seven-layer co-extruded barrier made using high quality virgin-grade polyethylene and EVOH resins to provide unmatched impact strength as well as superior resistance to gas and moisture transmission.
VaporBlock® Plus™ Placement
All instructions on architectural or structural drawings should be reviewed and followed.
Detailed installation instructions accompany each roll of VaporBlock® Plus™ and can also be located at www.ravenefd.com.
ASTM E-1643 also provides general installation information for vapor retarders.
VAPORBLOCK® PLUS™ 20
PROPERTIES TEST METHOD IMPERIAL METRIC
AppeArAnce White/Gold
Thickness, nominAl 20 mil 0.51 mm
WeighT 102 lbs/MSF 498 g/m²
clAssificATion ASTM E 1745 CLASS A, B & C
³ Tensile sTrengTh
ASTM E 154Section 9(D-882)58 lbf 102 N
impAcT resisTAnce ASTM D 1709 2600 g
permeAnce (neW mATeriAl)
ASTM E 154Section 7ASTM E 96Procedure B
0.0098 Perms
grains/(ft²·hr·in·Hg)
0.0064 Perms
g/(24hr·m²·mm Hg)
permeAnce (AfTer condiTioning)
(sAme meAsuremenT As Above permeAnce)
ASTM E 154Section 8, E96Section 11, E96Section 12, E96Section 13, E96
0.00790.00790.00970.0113
0.00520.00520.00640.0074
WvTr ASTM E 96Procedure B 0.0040 grains/hr-ft²0.0028 gm/hr-m²
benzene permeAnce See Note ⁶1.13 x 10-¹⁰ m²/sec or 3.62 x 10-¹³ m/s
Toluene permeAnce See Note ⁶1.57 x 10-¹⁰ m²/sec or 1.46 x 10-¹³ m/s
eThylbenzene permeAnce See Note ⁶1.23 x 10-¹⁰ m²/sec or 3.34 x 10-¹⁴ m/s
m & p-Xylenes permeAnce See Note ⁶1.17 x 10-¹⁰ m²/sec or 3.81 x 10-¹⁴ m/s
o-Xylene permeAnce See Note ⁶1.10 x 10-¹⁰ m²/sec or 3.43 x 10-¹⁴ m/s
hydrogen sulfide See Note 9 1.92E-⁰⁹ m/s
TrichloroeThylene (Tce) See Note ⁶7.66 x 10-¹¹ m²/sec or 1.05 x 10-¹⁴ m/s
perchloroeThylene (pce)See Note ⁶7.22 x 10-¹¹ m²/sec or 1.04 x 10-¹⁴ m/s
rAdon diffusion coeffiecienT K124/02/95 < 1.1 x 10-13 m2/s
meThAne permeAnce ASTM D 1434 3.68E-¹² m/sGas Transmission Rate (GTR):0.32 mL/m²•day•atm
mAXimum sTATic use TemperATure 180° F 82° C
minimum sTATic use TemperATure - 70° F - 57° C
UNDER-SLAB VAPOR / GAS BARRIER
VAPORBLOCK® PLUS™VBP20
© 2018 RAVEN INDUSTRIES INC. All rights reserved.
Scan QR Code to download
current technical data sheets
via the Raven website.
Note: To the best of our knowledge, unless otherwise stated, these are typical property values and are intended as guides only, not as specification limits. Chemical resistance, odor transmission, longevity as well as other performance criteria is not implied or given and actual testing must be performed for applicability in specific applications and/or conditions. RAVEN INDUSTRIES MAKES NO WARRANTIES AS TO THE FITNESS FOR A SPECIFIC USE OR MERCHANTABILITY OF PRODUCTS REFERRED TO, no guarantee of satisfactory results from reliance upon contained information or recommendations and disclaims all liability for resulting loss or damage. Limited Warranty available at www.RavenEFD.com
061318 EFD 1125
RAVEN ENGINEERED FILMSP.O. Box 5107 Sioux Falls, SD 57117-5107Ph: [phone] • TF: [phone] [e-mail]
³ Tests are an average of machine and transverse directions.5 Raven Industries performs seam testing at 20” per minute.6 Aqueous Phase Film Permeance. Permeation of Volatile Organic Compounds through EVOH Thin Film Membranes and Coextruded LLDPE/EVOH/
LLDPE Geomembranes, McWatters and Rowe, Journal of Geotechnical and Geoenvironmental Engineering© ASCE/
September 2015. (Permeation is the Permeation Coefficient adjusted to actual film thickness - calculated at 1 kg/m³.)
The study used to determine PCE and TCE is titled: Evaluation of diffusion of PCE & TCE through high performance geomembranes by Di
Battista and Rowe, Queens University 8 Feb 2018.9 The study used to determine diffusion coefficients is titled: Hydrogen Sulfide (H₂S) Transport through Simulated Interim Covers with Conventional and Co-Extruded Ethylene-Vinyl Alcohol (EVOH) Geomembranes.
INSTALLATION GUIDELINES - With VaporSeal™ Tape
VaporSeal™
4” Tape
VaporSeal™ 4” Tape Optional Butyl Seal
2-Sided Tape
Gas Barrier Applications
Elements of a moisture/gas-resistant floor system. General illustration only.(Note: This example shows multiple options for waterstop placement.
VaporSeal™
4” Tape
VaporSeal™ 4” Tape Optional Butyl Seal
2-Sided Tape
Gas Barrier Applications
Fig. 2: VaporBlock® Plus™ Overlap Joint Sealing Methods
Fig. 1: VaporBlock® Plus™ Overlapping Roll-out Method
Please Note: Read these instructions thoroughly before installation to ensure proper use of VaporBlock® Plus™. ASTM E 1465, ASTM E 2121 and, ASTM E 1643 also provide valuable information regarding the installation of vapor / gas barriers. When installing this product, contractors shall conform to all applicable local, state and federal regulations and laws pertaining to residential and commercial building construction.
• When VaporBlock® Plus™ gas barrier is used as part of an active control system for radon or other gas, a ventilation system will be required.
• If designed as a passive system, it is recommended to install a ventilation system that could be converted to an active system if needed.
Materials List:VaporBlock® Plus™ Vapor / Gas BarrierVaporSeal™* 4” Seaming TapeVaporSeal™* 12” Seaming/Repair TapeButyl Seal 2-Sided TapeVaporBoot Plus Pipe Boots 12/Box (recommended)VaporBoot Tape (optional)POUR-N-SEAL™ (optional)1” Foam Weather Stripping (optional)Mako® Screed Supports (optional)
VAPORBLOCK® PLUS™ PLACEMENT
1.1. Level and tamp or roll granular base as specified. A base for a gas-reduction system may require a 4” to 6” gas permeable layer of clean coarse aggregate as specified by your architectural or structural drawings after installation of the recommended gas collection system. In this situation, a cushion layer consisting of a non-woven geotextile fabric placed directly under VaporBlock® Plus™ will help protect the barrier from damage due to possible sharp coarse aggregate.
1.2. Unroll VaporBlock® Plus™ running the longest dimension parallel with the direction of the pour and pull open all folds to full width. (Fig. 1)
1.3. Lap VaporBlock® Plus™ over the footings and seal with Raven Butyl Seal tape at the footing-wall connection. Prime concrete surfaces, when necessary, and assure they are dry and clean prior to applying Raven Butyl Seal Tape. Apply even and firm pressure with a rubber roller. Overlap joints a minimum of 6” and seal overlap with 4” VaporSeal™ Tape. When used as a gas barrier, overlap joints a minimum of 12” and seal in-between overlap with an optional 2-sided Raven Butyl Seal Tape. Then seal with 4” VaporSeal™ Tape centered on the overlap seam. (Fig. 2)
Page 1 of 4 Top original diagram and figure #1 were reprinted with permission by the Portland Cement Association.Reference: Kanare, Howard M., Concrete Floors and Moisture, EB119, Portland Cement Association, Skokie, Illinois, and National Ready Mixed Concrete Association, Silver Spring, Maryland, USA, 2008, 176 pages.
1.4. Seal around all plumbing, conduit, support columns or other penetrations that come through the VaporBlock® Plus™ membrane.
1.4a. Method 1: Pipes four inches or smaller can be sealed with Raven VaporBoot Plus preformed pipe boots. VaporBoot Plus preformed pipe boots are formed in steps for 1”, 2”, 3” and 4” PVC pipe or IPS size and are sold in units of 12 per box (Fig. 3 & 5).
Pipe boots may also be fabricated from excess VaporBlock® Plus™ membrane (Fig. 4 & 6) and sealed with VaporBoot Tape or VaporSeal™ Tape (sold separately).
1.4b. Method 2: To fabricate pipe boots from VaporBlock® Plus™ excess material (see Fig. 4 & 6 for A-F):
A) Cut a square large enough to overlap 12” in all directions.
B) Mark where to cut opening on the center of the square and cut four to eight slices about 3/8” less than the diameter of the pipe.
C) Force the square over the pipe leaving the tightly stretched cut area around the bottom of the pipe with approximately a 1/2” of the boot material running vertically up the pipe. (no more than a 1/2” of stretched boot material is recommended)
D) Once boot is positioned, seal the perimeter to the membrane by applying 2-sided Raven Butyl Seal Tape in between the two layers. Secure boot down firmly over the membrane taking care not to have any large folds or creases.
E) Use VaporBoot Tape or VaporSeal™ Tape to secure the boot to the
pipe.
VaporBoot Tape (option) – fold tape in half lengthwise, remove half of the release liner and wrap around the pipe allowing 1” extra for overlap sealing. Peel off the second half of the release liner and work the tape outward gradually forming a complete seal.
VaporSeal™ Tape (option) - Tape completely around pipe overlapping the VaporBlock® Plus™ square to create a tight seal against the pipe.
F) Complete the process by taping over the boot perimeter edge with VaporSeal™ Tape to create a monolithic membrane between the surface of the slab and gas/moisture sources below and at the slab perimeter. (Fig. 4 & 6)
Preformed Pipe Boot Square Material Pipe Boot
Fig. 3
SINGLE PENETRATION PIPE BOOT INSTALLATION
Fig. 5 Fig. 6
1. Cut a square of VaporBlock® Plus™ barrier to extend at least 12” from the pipe in all directions.
2. Cut four to eight slices about 3/8” less than the diameter of the pipe.
5. Use Raven VaporBoot or VaporSeal™ Tape and overlap 1” at the seam.
4. Tape over the boot perimeter edge with VaporSeal™ Tape.
1. Cut out one of the preformed boot steps (1” to 4”).
2. Tape the underside boot perimeter with 2-sided Butyl Seal Tape.
3. Force the boot over pipe and press tape firmly in place.
4. Use VaporSeal™ Tape
to secure boot to the pipe.
5. Tape around entire boot edge with VaporSeal™ Tape.
VaporBoot Flexible Tapeor VaporSeal™ 4” TapeVaporSeal™ 4” Tape
VaporBlock® Plus™Material
VaporSeal™ 4” Tape
Raven Butyl Seal2-Sided Tape Raven Butyl Seal2-Sided Tape
VaporBoot PlusPreformed Boot 12”(minimum)
3. Force over pipe and tape the underside boot perimeter to existing barrier with 2-sided Butyl Seal Tape.
Fig. 4
Page 2 of 4 Original figure #4 diagram is reprinted with permission by the Portland Cement Association.Reference: Kanare, Howard M., Concrete Floors and Moisture, EB119, Portland Cement Association, Skokie, Illinois, and National Ready Mixed Concrete Association, Silver Spring, Maryland, USA, 2008, 176 pages.Method 1
Method 2
VaporSeal™4” Tape VaporBoot PlusPerformed Boot
Raven Butyl Seal 2-sided Tape Raven Butyl Seal 2-sided Tape
1.5. Sealing side-by-side multiple penetrations (option 1);
A) Cut a patch large enough to overlap 12” in all directions (Fig. 7)
of penetrations.
B) Mark where to cut openings and cut four to eight slices about
3/8” less than the diameter of the penetration for each.
C) Force patch material over penetration to achieve a tight fit and
form a lip.
D) Once patch is positioned, seal the perimeter to the membrane
by applying 2-sided Raven Butyl Seal Tape in-between the two
layers. (Fig. 8)
E) After applying Raven Butyl Seal Tape between the patch and
membrane, tape around each of the penetrations and the patch
with VaporSeal™ 4” tape. (Fig. 9) For additional protection apply
POUR-N-SEAL™ or an acceptable polyurethane elastomeric
sealant around the penetrations. (Fig. 10)
Fig. 7 Fig. 8
Fig. 9 Fig. 10
MULTIPLE PENETRATION PIPE BOOT INSTALLATION
Fig. 6
Cut a patch large enough to overlap 12” in all directions and slide over penetrations (Make openings as tight as possible.)
Once the overlay patch is positioned, seal the perimeter to the membrane by applying 2-sided Raven Butyl Seal Tape in-between the two layers.
After applying Raven Butyl Seal Tapebetween the patch and membrane, tape around the perimeter of the penetration and the patch with VaporSeal™ 4” Tape.
For additional protection apply POUR-N-SEAL™ or an acceptable polyurethane elastomeric sealant around the penetrations.
VaporSeal™ 4” Tape VaporSeal™ 4” Tape
Page 3 of 4
Option 1
Raven Butyl Seal 2-sided Tape
1.6. POUR-N-SEAL™ method of sealing side-by-side multiple penetrations (option 2);
A) Install the vapor barrier as closely as possible to pipe penetrations to minimize the amount of POUR-N-SEAL™ necessary to seal around all penetrations.
B) Once barrier is in place, remove soil or other particles with a dry cloth or a fine broom to allow for improved adhesion to the POUR-N-SEAL™ liquid.
C) Create a dam around the penetration area approximately 2” away from the pipe or other vertical penetrations by removing the release liner from the back of a 1” weather stripping foam and adhere to the vapor barrier. Form a complete circle to contain the POUR-N-SEAL™ materials (Fig. 11).
D) Once mixed, pour contents around the pipe penetrations. If needed, a brush or a flat wooden stick can be used to direct the sealant completely around penetrations creating a complete seal (Fig. 12-13).
E) DO NOT leave excess POUR-N-SEAL™ in plastic container for longer than the time it takes to pour sealant.
Fig. 12 Fig. 13
Fig. 11
Option 2
VAPORBLOCK® PLUS™ REPAIR INSTRUCTIONS
1.7. Proper installation requires all holes and openings are repaired prior
to placing concrete. When patching small holes, simply cut a 12” long
piece of 12” wide VaporSeal™ tape. Remove release liner and center
over the opening. Apply pressure to create a seal (Fig. 14-15).
1.8. When installing VaporBlock® Plus™ around pipe penetrations,
vertical columns, electrical ducts and other obstructions, you will
find it necessary to cut it to the nearest outside edge. This cut can
be easily sealed with 12” wide VaporSeal™ tape, by simply centering
it over the cut, 6” on either side. Once the tape is placed correctly,
apply pressure to assure a complete seal (Fig. 16).
Reminder Note: All holes or penetrations through the membrane will need
to be patched with 12” VaporSeal™ Tape.
Fig. 14
Page 4 of 5
Fig. 15
2.1. When installing reinforcing steel and utilities, in addition to the
placement of concrete, take precaution to protect VaporBlock®
Plus™. Carelessness during installation can damage the most
puncture–resistant membrane. Sheets of plywood cushioned with
geotextile fabric temporarily placed on VaporBlock® Plus™ provide
for additional protection in high traffic areas including concrete
buggies.
2.2. Use only brick-type or chair-type reinforcing bar supports to protect
VaporBlock® Plus™ from puncture.
2.3. Avoid driving stakes through VaporBlock® Plus™. If this cannot be
avoided, each individual hole must be repaired per section 1.7.
2.4. To avoid penetrating VaporBlock® Plus™ when installing screed
supports, utilize non-penetrating support, such as the Mako®
Screed Support System (Fig. 17). Avoid driving stakes through
VaporBlock® Plus™. If this cannot be avoided, each individual hole
must be repaired per figures 14-15.
2.5. If a cushion or blotter layer is required in the design between
VaporBlock® Plus™ and the slab, additional care should be given if
sharp crushed rock is used. Washed rock will provide less chance of
damage during placement. Care must be taken to protect blotter layer
from precipitation before concrete is placed.
VaporBlock® Plus™ Gas & Moisture Barrier can be identified on site
as gold/white in color printed in black ink with following logo and
classification listing (Fig. 18)
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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
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