24010 Yandle Witherspoon VIMP 20211208

Via Email
December 8, 2021
NCDEQ – Division of Waste Management Brownfields Program
1646 Mail Service Center Raleigh, NC 27699-1646
Attn: Mr. Bill Schmithorst
Re: Vapor Intrusion Mitigation Plan Yandle-Witherspoon Supply, Inc. Charlotte, North Carolina
Brownfields Project No. 24010-20-060
H&H Project No. WPP-014
Dear Bill:
Please find the enclosed Vapor Intrusion Mitigation Plan (VIMP) prepared for the proposed Alexan
Optimist Park Phase II apartments redevelopment at the Yandle-Witherspoon Supply, Inc. Brownfields property located in Charlotte, Mecklenburg County. The plan has been revised to address DEQ comments provided on September 22, 2021.
Should you have questions or need additional information, please do not hesitate to contact us at [phone].
Sincerely,
Hart & Hickman, PC
Alexis McKenzie, PE Christie Zawtocki, PE Project Engineer Principal Engineer
Enclosure
cc: Mr. Jay Levell, White Point Partners (Via Email) Mr. Justin Adams, Trammell Crow Residential (Via Email)
Ms. Laura Truesdale, Alexander Ricks (Via Email)

Vapor Intrusion Mitigation Plan
Alexan Optimist Park Phase II

Yandle-Witherspoon Supply, Inc
N. Brevard Street and Belmont Avenue
Charlotte, North Carolina
Brownfields Project No. 24010-20-060

H&H Job No. WPP-014
Revised December 8, 2021

#C-1269 Engineering #C-245 Geology
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Vapor Intrusion Mitigation Plan Alexan Optimist Park Phase II Charlotte, North Carolina Brownfields Project No. 24010-20-060 H&H Job No. WPP-014

Table of Contents

1.0 Introduction ................................................................................................................ 1
2.0 Design Basis ................................................................................................................ 5
3.0 Quality Assurance / Quality Control ........................................................................ 8
4.0 Post-Construction System Effectiveness Testing .................................................... 9
5.0 Post-Occupancy Testing .......................................................................................... 16
6.0 Future Tenants & Building Uses ............................................................................ 17
7.0 Reporting .................................................................................................................. 18

Figures Figure 1 Site Map
Figure 2 Site and Surrounding Area Map

Appendices

Appendix A Alexan Optimist Park Phase II Development Plan
Appendix B Summary Tables and Sample Location Map
Appendix C Vapor Intrusion Mitigation Plan – VM-1, VM-2, and VM-3
Appendix D Vapor Intrusion Mitigation System Product Specifications

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Vapor Intrusion Mitigation Plan Alexan Optimist Park Phase II Charlotte, North Carolina Brownfields Project No. 24010-20-060 H&H Job No. WPP-014
1.0 Introduction
On behalf of WP Yandle, LLC (the Prospective Developer or PD), Hart & Hickman, PC (H&H)
has prepared this Vapor Intrusion Mitigation Plan (VIMP) for installation of a vapor intrusion
mitigation system (VIMS) for the proposed Alexan Optimist Park Phase II Apartments multi-
family development at the Yandle-Witherspoon Supply, Inc. Brownfields Property (Brownfields
Project No. 24010-20-060) located northwest of the N. Brevard Street and Belmont Avenue
intersection in Charlotte, Mecklenburg County, North Carolina (Site). The Site consists of five
contiguous parcels, the alleyway between parcels, and land located between the Seaboard
Coastline railroad. Collectively, the Site totals approximately 6.0 acres of land located in a rapidly
densifying residential and commercial use area less than one mile east of uptown Charlotte along
the LYNX Blue Line light rail corridor. A Site location map is provided as Figure 1, and the Site
and surrounding area is shown in Figure 2.

The western portion of the Site is developed with an approximate 65,480 square foot (sq ft)
warehouse building most recently occupied by Yandle-Witherspoon Supply, Inc. (Yandle-
Witherspoon). The southeastern portion of the Site is developed with an approximately 4,500 sq
ft office building occupied by The Plaid Penguin. Proposed redevelopment of the Brownfields
property includes razing the existing Site buildings and construction of an apartment complex and
multi-story office building with associated parking areas and access roads. Proposed
redevelopment plans are included in Appendix A.

H&H completed Brownfields assessment activities for the Site in April 2021 to evaluate Site
surface and subsurface conditions for potential impacts. Summary tables and a sample location
map are included in Appendix B. Results of groundwater assessment activities completed in the
western (upgradient) and northern (downgradient) portions of the Site identified low levels of
tetrachloroethene (PCE, up to 8.9 µg/L) at concentrations above the DEQ 2L Standard. In addition,
low levels of trichloroethene (TCE, up to 5.6 µg/L) were detected in the downgradient portion of
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the Site at concentrations above the DEQ 2L Standard and the Division of Waste Management
(DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs). No other compounds were
detected at concentrations above the 2L Standards or GWSLs in the groundwater samples collected
at the Site.

Results of the soil gas assessment activities completed within the footprint of proposed residential
and office buildings did not identify the presence of compounds at concentrations above the DEQ
DWM Vapor Intrusion Sub-slab and Exterior Soil Gas Screening Levels (SGSLs). Results of
cumulative risk calculations utilizing the highest concentration of any compound detected in any
soil gas sample confirm that the cumulative carcinogenic and noncarcinogenic risks are orders of
magnitude below the DEQ and EPA acceptable levels.

Although assessment results do not indicate an unacceptable vapor intrusion risk at the Site, the
PD has elected to proactively install a passive vapor intrusion mitigation system in the proposed
mixed-use residential and commercial building during redevelopment activities as a precautionary
measure. Installation of the VIMS will satisfy the following Land Use Restriction (LUR) which
is standard language in the Brownfields Agreement:

No enclosed building may be constructed on the Brownfields Property and no existing
building, defined as those depicted on the plat component of the Notice of Brownfields
Property referenced in paragraph 18 below, may be occupied until DEQ determines in writing
that:
i. the building is or would be protective of the building’s users and public health from the
risk of vapor intrusion based on site assessment data, or a site-specific risk assessment
approved in writing by DEQ; or
ii. a vapor intrusion mitigation system (VIMS) has been:
1. designed to mitigate vapors for subgrade building features in accordance with the most
recent and applicable DWM Vapor Intrusion Guidance, Interstate Technology &
Regulatory Council (ITRC) guidance, and American National Standards Institute
(ANSI)/American Association of Radon Scientists and Technologists (AARST)
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standards, and that said design shall fully protect public health to the satisfaction of a
professional engineer licensed in North Carolina, as evidenced by said engineer’s
professional seal, and shall include a performance monitoring plan detailing
methodologies and schedule, both of which are subject to prior written DEQ approval;
and
2. installed and an installation report is submitted for written DEQ approval that includes
details on any deviations from the system design, as-built diagrams, photographs, and
a description of the installation with said engineer’s professional seal confirming that
the system was installed per the DEQ-approved design and will be protective of public
health.

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

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

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2.0 Design Basis
The VIMP is included in Appendix C (Sheets VM-1, VM-2, and VM-3) and will be used to guide
construction of the VIMS. The proposed Site redevelopment plan (Appendix A) includes one
residential apartment building which will be constructed with concrete slab-on-grade foundations
and structural footings in the residential units and column foundation in the resident amenity
spaces. The proposed building will wrap around a multi-story open-air parking deck which will
be constructed on the northwestern portion of the Site. The approximate first-floor footprint for
the building is approximately 62,217 square feet (sq ft). The proposed redevelopment plan also
includes a proposed office building to the north of the apartment building. A vapor mitigation plan
for the office building will be submitted under separate cover.
The VIMP includes installation of MonoShield™ vapor barrier manufactured by Land Science
beneath the ground level concrete slab of the residential apartment building. MonoShield™ is a
chemically-resistant 30-mil, multi-layer, vapor barrier, designed to prevent the migration of
volatile organic compounds (VOCs). Technical specifications and installation instructions
obtained from Land Science for the MonoShield™ vapor barrier are provided in Appendix D.
The VIMP specifies that the vapor barrier will be installed per manufacturer installation
instructions (Appendix D). Briefly, MonoShield™ will be installed by a certified Land Science
contractor to cover the ground surface below the entire area of the proposed ground floor slab of
the apartment building. The exterior edges of the MonoShield™ will be attached and sealed to
existing concrete utilizing spray-applied Nitra-Core™ barrier at a thickness of 60-mil. Seams
within the building footprint will have a minimum 6-inch overlap and will be sealed with a 60-mil
thickness of Nitra-Core™. Small puncture holes will be sealed with Nitra-Core™, and larger holes,
tears, or damage will be repaired using a patch that overlaps the damaged area and then will be
sprayed along the seams with Nitra-Core™. In areas where utility penetrations (i.e., piping, ducts,
etc.) are present and the use of taping is not practical or deemed as “ineffective” by the design
engineer, a minimum of 60 mil of Nitra-Core™ will be used to form an airtight seal around the
penetrations. Locations where Nitra-Core™ is applied at penetration banks will be documented
during the field inspections and noted on the as-built drawings. To evaluate the vapor barrier
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installation and Nitra-Core™ thickness, the installation process will include measuring the Nitra-
Core™ thickness during application and smoke testing to confirm the MonoShield™ system is free
of leaks. If any leaks are identified during smoke testing, the identified areas will be repaired with
a patch and/or additional spray-applied sealant.
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 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 engineer which meets the criteria specified in Sheet VM-1 of the VIMP may be
used by the installation contractor, such as Vaporblock® Plus 20 (VBP20) manufactured by Raven
Industries or Drago Wrap® manufactured by Stego Industries. If VBP20 or Drago Wrap® is
selected for use, DEQ will be notified in writing and specification and installation instruction
sheets will be provided.
The VIMP also includes installation of an enhanced passive mitigation system beneath the slab-
on-grade levels of each building to reduce the potential for vapor intrusion into the proposed
buildings by vapor extraction. Vapor extraction will be accomplished using syphon ventilators,
vapor collection/conveyance piping, and TerraVent™, which will collect vapor from beneath the
slab of the buildings and discharge the vapor through exhaust stacks installed above the building
roofs. Product specifications for the syphon ventilator and TerraVent™ are included in Appendix
D.
The VIMP includes Empire Model SV04SS (stainless steel) syphon ventilator fans or Empire
Model TV04SS (stainless steel) turbine ventilator fans (or a design engineer approved alternate
fan) installed on the discharge end of the exhaust stacks on the roof. The exhaust discharge
locations shall be a minimum of 10 feet from any operable opening or air intake for the building
and a minimum of 2 feet above the roofline. For system redundancy, the vent systems below the
slab-on-grade spaces are interconnected. The interconnected systems will allow for continued sub-
slab depressurization below the building slabs in the event that one of the fans is damaged in
between yearly inspections completed by building maintenance.
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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 slabs
to allow for air movement beneath the entirety of the slabs. TerraVent™, a sub-slab vapor
collection mat (1-inch tall by 12” wide), will be installed within the high permeability stone
layer. The high permeability stone around the piping will have a minimum thickness of 4 inches
and will extend a minimum of 1 inch above the mat and a minimum of 1 inch below the mat.
Similarly, in areas without collection mat, a minimum thickness of 4 inches of clean stone is
required. In the event that an alternative vapor barrier is selected as discussed above, alternate
sub-slab collection piping including threaded flush joint or glue joint 3” slotted PVC pipe, 3”
perforated PVC pipe, soil gas collector mat, or similar may be approved by the design engineer.
DEQ will be notified in writing if an alternative piping is selected.
In the event the system needs to be activated with electric fans (see Section 4.0), the VIMP includes
vacuum measuring points (depicted in Sheet VM-3). The vacuum measuring points will be used
to measure the pressure differential between indoor air and the sub-slab, should electric fans be
needed. To prevent disrupting building operations in the future, the vacuum measuring point
access ports are located in areas that do not disturb building occupants, such as hallways and
mechanical rooms (see Sheet VM-3 in Appendix C).
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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 pouring the concrete building slab;
• during coupon sampling and smoke testing; and
• after installation of vertical exhaust riser pipe and ventilators.

Please note that a fourth inspection will be conducted if the VIMS is activated to verify that the
electric fans are functioning properly. Each inspection will be performed by, or under direction
of, the design engineer certifying the VIMP. No component of the VIMS shall be covered until
an inspection is completed. The inspections will include field logs and photographs for each
section of slab. Locations where Nitra-Core™ is applied to a penetration bank will be
photographed, noted on the field logs, and shown on the as-built drawings. The use of hollow
piping by contractors to support their utilities in preparation for concrete pours is not permitted.
Contractors will be instructed to remove any hollow piping observed during the field inspections.
As requested, the engineer certifying the report, or designee, will provide DEQ with 48 hours
notice prior to conducting the inspections.

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4.0 Post-Construction System Effectiveness Testing

Influence Testing
Following installation of the horizontal extraction piping, vapor barrier, and concrete slab pours,
but prior to building occupancy, influence testing will be conducted on the VIMS vent piping
network to confirm that the VIMS will provide proper vacuum influence below the slab, if the
system is activated with electric fans in the future. For the influence test, variable speed vapor
extraction fans will be attached to the vertical risers and vacuum will be measured at the extraction
fan locations and at the permanent and temporary vacuum measuring points (denoted TMP on
sheet VM-3 included in Appendix C) for the section of slab being evaluated.

The results of the influence test will be submitted to DEQ with the construction completion report.
If modifications to the VIMS are required to achieve vacuum influence of 4 pascals (0.016-inches
water column), additional influence testing will be completed to evaluate the system modifications.
Following successful influence testing, the temporary vacuum measuring points will be
abandoned.

Sub-Slab Gas Sampling
Upon completion of successful influence testing and prior to occupancy of the Site building, sub-
slab soil gas samples will be collected from beneath the apartment, leasing office, and the amenity
spaces to determine if follow-up indoor air sampling is warranted. The sub-slab soil gas samples
will be collected from select permanent vacuum measuring points as shown on Sheet VM-3 in
Appendix C. Sub-slab soil gas sampling will be completed in each building as outlined below.

Nine sub-slab samples will be collected from the apartment building footprint. The initial sub-
slab soil gas sampling event will be conducted after a minimum of two weeks following the
installation of the syphon ventilator fans.

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 stainless-steel sample “T” fitting which allows two vapor
samples to be collected simultaneously from a single measuring point. The vacuum measuring
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points will be sampled by securing an expandable cap with a sample port (i.e., an Ex-Cap) into the
vacuum measuring point to create an air-tight seal. The sub-slab vapor sample will then be
collected using the recommended procedures presented in the DWM VI Guidance.

Prior to sample collection, a leak test will be performed on each vacuum measuring point location
by placing a shroud around the sealed sampling point and sample train including the Summa
canister, flooding the air within the shroud with helium gas, then purging 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. The leak test will be considered successful if the helium concentration
measured in the soil gas purged from the sampling point and collected into the Tedlar® bag is less
than 10% of the concentration measured within the shroud. H&H field personnel will record the
results of the helium leak test in field documentation. In total, a minimum of 3 volumes will be
purged from the sample train prior to and during the leak test.

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
the 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 (in Hg), and ideally around 5 in Hg, to allow for proper laboratory analysis of the sample.

Although the DWM VI Guidance recommends initial groundwater and soil gas assessment
activities be completed to reduce the analyte list for future vapor intrusion assessments and aid in
eliminating background sources, DEQ is requiring sub-slab samples be analyzed for the full list of
VOCs. As such, H&H will submit the sub-slab soil gas samples to a qualified laboratory under
standard chain of custody protocols for analysis of the full list of VOCs by EPA Method TO-15.
The laboratory will be instructed to report J-flag concentrations for each sample, to report received
canister vacuum, and to include naphthalene in the TO-15 analyte list. 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 SGSLs.

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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 residential apartment development. In the case where calculated
cumulative risks are less than 1x10-4 for potential carcinogenic risks and below a hazard index of
1 for potential non-carcinogenic risks, the PD will request DEQ provide occupancy approval.

Post-occupancy sub-slab soil gas sampling will be completed approximately 6 months following
the pre-occupancy sampling event and then on a semi-annual basis for future events. The sub-slab
sampling events will be completed using the methods discussed above. If semi-annual sampling
results indicate consistent or decreasing concentrations within acceptable risk levels, a request to
modify or terminate sampling will be submitted for DEQ approval.

Note that the generic sub-slab soil gas to indoor air attenuation factor that is the basis for DEQ risk
calculations is very conservative and is intended to estimate a potential upper-bound indoor air
concentration accounting for temporal variability. DEQ DWM VI Guidance indicates that if soil
gas concentrations do not exceed acceptable risk levels, typically no further investigation is
necessary. However, DEQ has requested completion of an initial indoor air event concurrent with
the pre-occupancy sub-slab soil gas sampling event.

DEQ has indicated that a request can be made following the pre-occupancy indoor air sampling
event to reduce or terminate future indoor air sampling events based on the pre-occupancy
influence testing, sub-slab soil gas, and indoor air results. If indoor air sampling is required for
post-occupancy events, it will be conducted semi-annually in concurrence with the sub-slab soil
gas sampling.

If indoor air sampling is terminated, but calculated cumulative risks for the sub-slab samples
collected during future events are greater than 1 x10-4 for potential carcinogenic risks and/or above
a hazard index of 1 for potential non-carcinogenic risks, additional indoor air sampling will be
completed. Please note that prior to proceeding with indoor air sampling, the sub-slab soil gas
data will be reviewed to confirm that background sources (e.g., building materials) are not
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influencing cumulative risks. If background sources are identified and confirmed, DEQ will be
notified and indoor air sampling will not be performed with written DEQ approval.

The results of sub-slab vapor sampling completed at the Site will be reported to DEQ, as described
in Section 7.0. The building shall not be occupied until the results of the initial, pre-occupancy
sub-slab vapor sampling and indoor air sampling are submitted to DEQ and written approval for
occupancy is obtained from DEQ.

Indoor Air Sampling
The building is intended to be occupied shortly following completion and initialization of the
HVAC system. As discussed with DEQ, there is typically insufficient time before occupancy to
wait for the HVAC system to become operational prior to indoor air sampling. Therefore, the pre-
occupancy indoor air sampling event will be conducted following construction and completion of
the VIMS including a minimum of one week with operational syphon ventilators. Prior to indoor
air sampling, H&H will obtain DEQ approval to proceed with the sampling and provide a statement
confirming that the portion of the building being sampled is substantially complete (e.g., windows
and doors installed and sealed) with no openings to outdoor air which could potentially bias the
indoor air data in the area being sampled. Based on discussions with DEQ, five indoor air samples
will be collected from the first-floor level of the building at the approximate locations depicted on
VM-3. The building shall not be occupied until the indoor air results are provided to DEQ and
written approval for occupancy is obtained from DEQ.

Each indoor air sample will be collected in accordance with the DWM VI Guidance, using a 6-
liter individually-certified 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. The intake for each indoor air Summa canister will be placed at a height consistent with the
breathing zone. Periodic checks will be conducted by H&H to monitor the pressure within the
Summa canisters to confirm adequate sample volume is collected. The vacuum of the Summa
canisters will be measured at the start and end of the sampling event and will be recorded on the
chain-of-custody and field notes. The vacuum at the end of the sampling event should remain at
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or above approximately -5 inches of mercury (in Hg), as measured with the field vacuum gauge.
In no instance shall the canister vacuum reach 0 in Hg.

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 reporting limits below
the DEQ Residential Vapor Intrusion Indoor Air Screening Levels (IASLs). Per standard
procedure, the laboratory will report the vacuum levels of the canisters upon receipt by the
laboratory. For QA/QC purposes, one duplicate sample and one background air sample will be
collected during each indoor air sampling event. In addition, an Indoor Air Building Survey form
(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 VOCs 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 (SDSs) for
materials used during construction and the SDSs 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 1x10-4 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). Active fans will be installed as part of the VIMS and follow-up sampling will be
performed after installation of the fans should results of confirmation indoor air samples
indicate that passive treatment is inadequate (in the case where calculated cumulative risks
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continue to be greater than 1x10-4 for potential carcinogenic risks or above a hazard index
of 1 for potential non-carcinogenic risks).

Please note that DEQ may require additional indoor air sampling to confirm that the VIMS is
effective if results suggest a completed vapor intrusion pathway, even if cumulative risk is below
a LICR of 1x10-4 or HI of 1. Prior to completing additional indoor air sampling, an evaluation of
potential background sources will be completed and inspections will be performed to determine if
preferential vapor intrusion pathways may exist.

If additional indoor air sampling is required, modifications to the existing system will first be
evaluated to increase effectiveness. Should results of post-construction indoor air testing continue
to indicate potential unacceptable vapor intrusion risks to occupants of the building(s), active fans
will be installed at the discharge end of the riser duct piping (as needed) to convert the system
from passive to active sub-slab depressurization. DEQ will be notified of alterations to the system.
If the system were transitioned to an active system in the future, a work plan will be submitted to
DEQ to document a schedule for additional monitoring, such as annual vacuum measurements.

Sub-Slab Gas and Indoor Air Sampling Reporting
A report of the sub-slab gas and indoor air sampling will be submitted to DEQ with the
construction completion report. If additional indoor air sampling is required based upon the
recommendations above, a report of the indoor air sampling will be submitted to DEQ following
completion of the sampling and receipt of the analytical data.

Following receipt of analytical results, the laboratory report will be reviewed and DEQ will be
notified in the event that TCE concentrations in indoor air or sub-slab indicate potential vapor
intrusion pathways may exist. In accordance with the DEQ DWM TCE Indoor Air Inhalation
Immediate Action Levels and Response guidance (dated July 2019), DEQ will be notified within
24 hours (1 business day) of receipt of the laboratory data if TCE is detected at a concentration
exceeding 2.1 µg/m3 in indoor air. DEQ will also be notified prior to report submittal if sub-slab
and indoor air samples indicate a completed pathway exists to discuss whether additional sampling
or other measures are warranted.
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The building shall not be occupied until the results of the initial, pre-occupancy sub-slab vapor
sampling and indoor air sampling are submitted to DEQ and written approval for occupancy is
obtained from DEQ.

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5.0 Post-Occupancy Testing

The VIMS is proposed as a passive system which will utilize sub-slab vapor extraction through
vapor extraction piping and syphon ventilators on the roof. As such, post-occupancy differential
pressure testing is not anticipated. If the VIMS is converted to an active system based on results
of post-construction and pre-occupancy sub-slab gas and/or indoor air assessment results, vapor
mitigation system modifications and plans for additional indoor air sampling and long-term
differential pressure monitoring across the slab will be submitted to the DEQ Brownfields Program
for approval prior to implementation. Specifications for the potential fan to be used, if conversion
to the active system, is deemed necessary are included in Appendix D. However, a different fan
may be specified by the design engineer based on the influence testing results.

As discussed above, post-occupancy sub-slab soil gas sampling will be completed approximately
6 months following the pre-occupancy event and on a semi-annual basis for future events. The
sampling events will be completed using the methods discussed above. If semi-annual event
results indicate consistent or decreasing concentrations within acceptable risk levels, a request to
modify or terminate sampling will be submitted for DEQ approval.

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6.0 Future Tenants & Building Uses

The future use of the proposed Site buildings includes residential and associated amenity spaces.
After occupancy of the Site building, the building maintenance department will maintain the vapor
mitigation piping and ventilators. If vapor mitigation components are damaged or need to be
altered for building renovations, the building management will be instructed to contact the
maintenance department. The maintenance department shall contact a North Carolina licensed
Professional Engineer to oversee or inspect the activities, and a report shall be submitted to DEQ
detailing the repairs or alterations. To aid in identification of the vapor mitigation piping, the
piping will be labeled with “Vapor Mitigation – Contact maintenance”, or similar language, on all
accessible piping at intervals of no greater than 10-linear feet.

Future VIMS maintenance and upkeep will be the responsibility of the property management group
or building owner. As part of the annual Land Use Restriction Update submittal, H&H
recommends the building owner or management complete a visual inspection of the exposed
components of the system including, but not limited to, the vertical risers and ventilators on the
roof and the monitoring points. H&H recommends annual inspections be documented and kept
on record.

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7.0 Reporting

A construction completion 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, operating properly, and protective of human health from
potential vapor intrusion of known Brownfields property contaminants. The report will include a
summary of VIMS installation activities, quality assurance and quality control measures, pre-
occupancy system effectiveness testing including sub-slab and indoor air assessment results (if
warranted), inspection photographs (including locations of penetration banks), SDSs, as-built
construction drawings, and an opinion as to whether the VIMS was installed in accordance with
the DEQ-approved VIMP. Multiple reports may be submitted depending on the construction
schedule of the building.

Prior to occupancy of the building, the results of the influence testing, sub-slab vapor sampling,
and indoor air sampling will be submitted to the Brownfields Program. The building shall not be
occupied until DEQ provides written approval.

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

Figures
USGS The National Map: National Boundaries Dataset, 3DEP ElevationProgram, Geographic Names Information System, National HydrographyDataset, National Land Cover Database, National Structures Dataset,and National Transportation Dataset; USGS Global Ecosystems; U.S.Census Bureau TIGER/Line data; USFS Road Data; Natural Earth Data;U.S. Department of State Humanitarian Information Unit; and NOAANational Centers for Environmental Information, U.S. Coastal ReliefModel. Data refreshed May, 2020.
SITE LOCATION MAP
YANDLE-WITHERSPOON FACILITY1001 NORTH BREVARD STREETCHARLOTTE, NORTH CAROLINA
DATE: 2-8-21
JOB NO: WPP-014
REVISION NO: 0
FIGURE NO: 1
3921 Sunset Ridge Road, Ste. 301Raleigh, North Carolina 27607919-847-4241 (p) 919-847-4261 (f)License # C-1269 / # C-245 Geology
TITLE
PROJECT
0 2,000 4,000
SCALE IN FEET
SITE
Path: \\HHFS01\Redirectedfolders\sperry\My Documents\ArcGIS\PROJECTS\WPP-014\Figure 1 - Site Location Map.mxdN
U.S.G.S. QUADRANGLE MAP
CHARLOTTE EAST, NORTH CAROLINA 2013
QUADRANGLE7.5 MINUTE SERIES (TOPOGRAPHIC)
REVISION NO. 0
JOB NO. WPP-014
DATE: 3-18-21
FIGURE NO. 2
YANDLE-WITHERSPOON SUPPLY INC.
1001 NORTH BREVARD STREET
CHARLOTTE, NORTH CAROLINA
SITE AND SURROUNDING
AREA MAP
LEGEND
BROWNFIELDS PROPERTY
BOUNDARY
PARCEL BOUNDARY
RAILROAD TRACK
TRIBUTARY OF LITTLE SUGAR CREEK
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
NOR
T
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B
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V
A
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LMO
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NOTES:
1.PARCEL DATA AND AERIAL IMAGERY OBTAINED FROM
MECKLENBURG COUNTY GIS, 2020.
2.NCBP = NORTH CAROLINA BROWNFIELDS PROGRAM
IHSB = INACTIVE HAZARDOUS SITES BRANCH
DSCA = DRY-CLEANING SOLVENT CLEANUP ACT
ALPHA MILLS APARTMENTS
(NCBP NO. 07009-03-060 &
IHSB PROJECT NO. NCD003162500)ALEXAN APARTMENTS
(1009 NORTH CALDWELL STREET)
OPTIMIST HALL
PARKING
OPTIMIST HALL
(NCBP NO. 20005-16-060)
FORMER GAY LAUNDRY AND CLEANERS
(DSCA PROJECT NO. DC60044)
ALPHA CANVAS AND AWNING
(411 EAST 13TH STREET)
MERCHANTS BONDED COTTON
WAREHOUSE BROWNFIELDS PROJECT
(200 WADSWORTH PLACE)
(NCBP NO. 24013-20-060)

Appendix A
Alexan Optimist Park Phase II Development Plan

T
T
T
F
F
F
F
F
F
T
2S/2R2S/2R2S/2R2S/2R2S/2R
UP
UP
T
T
T
F
F
F
F
F
F
T
UP
UP
UPUP
UP
(2) multi family transformer
s
Pool Courtyard
Passive Courtyard
LeasinglAmenity
6' - 10 103/128"8' - 8"2 + 1 HCT T T
TTPLAZA
82 TOTAL PARKING
SPACES THIS LEVEL
30 COMPACT
4(1C)STAIRSTAIR'SROOF9(1C)
4(2C)LOB.UP
5.43%
14(5C)
14(6C)
3(2C)
13(7C)
4(2C)
+705 +704
1:13.5 (7.4%)1'-6" STEP
(7.4%) 6" STEP
UP
5.43%
17(4C)© 2020 CLINE DESIGN ASSOCIATES, PA EXPRESSLY RESERVES ITS COMMON LAW COPYRIGHT AND OTHER PROPERTY RIGHTS IN THESE PLANS. THESE PLANS ARE NOT TO BE REPRODUCED, CHANGED OR COPIED IN ANY FORM OR MANNER WHATSOEVER, NOR ARE THEY TO BE ASSIGNED TO ANY THIRD PARTY WITHOUT FIRST OBTAINING THE EXPRESSED WRITTEN PERMISSION AND CONSENT OF CLINE DESIGN ASSOCIATES, PA.DRAWN BY:
CHECKED BY:
DATEREVISIONS:
DATE:
PROJECT:
220 E. Peterson Dr.
Charlotte, NC 28217
704/333-7272
ClineDesignAssoc.comNOT FORCONSTRUCTION4/21/2021 1:00:53 PMC:\Users\DanielRi\Documents\221002_Optimist II_DD_R21_danielriXCQQ6.rvtTRAMMELL CROW RESIDENTIALOptimist IICHARLOTTE, NC221002
ARCHITECTURAL SITE
PLAN
G1.02
04.20.21
DCR / AA / NS
TEAM INITIALSDESIGNDEVELOPMENT
1" = 20'-0"
100 Site Plan
OVERALL TOTAL 108 3 111
THIRD FLOOR: 27 1 28
SECOND FLOOR: 27 1 28
FIRST FLOOR (UPPER): 33 -- 33
FIRST FLOOR (LOWER): 21 1 18
STANDARD HANDICAPPED
TOTAL (PER
FLOOR)
BIKE PARKING COUNTS:
39%(17 HC REQ. 18 PROVIDED, 3 VAN REQ. 4 VAN
PROVIDED)
OVERALL TOTALS
381 258 -- 4 14 657
ON STREET (SURFACE) LEASING 2 -- -- -- 1 3
TOP FLOOR 52 30 -- -- 82
SEVENTH FLOOR 50 31 -- -- 81
SIXTH FLOOR 49 31 -- -- 1 81
FIFTH FLOOR 51 27 -- -- 2 80
FOURTH FLOOR 51 27 -- -- 2 80
THIRD FLOOR 38 38 -- 4 80
SECOND FLOOR 39 37 -- 2 2 80
PARKING GARAGE
FIRST FLOOR 49 37 -- 2 2 90
VAN STANDARD HC
STANDARD COMPACT
FUTURE EV HANDICAPPED FLOOR
TOTALS
Parking Counts

Appendix B Summary Tables and Sample Location Map

Table 3
Summary of Groundwater Analytical Data
Yandle-Witherspoon Supply, Inc.
Charlotte, North Carolina
H&H Job No. WPP-014
Evaluation Area Upgradient - Western
Corner
Sample ID TMW-1
Date
Units
VOCs (8260D)
Acetone 12.3 J <5.1 <5.1 6,000 4,500,000 19,000,000
1,2-Dichlorobenzene 0.70 J 0.91 J 1.1 20 530 2,200
cis-1,2-Dichloroethene <0.38 1.2 1.5 70 NE NE
2-Hexanone <0.48 <0.48 1.2 J NE 1,600 6,900
Tetrachloroethene 2.2 8.0 8.9 0.7 12 48
Trichloroethene 0.96 J 5.2 5.6 3 1 4.4
SVOCs (8270E)ALL BDL ALL BDL ALL BDL ------
Metals (6020B/7470A)
Arsenic 0.340 J 0.217 J 0.228 J 10 ----
Barium 70.6 70.9 69.3 700 ----
Cadmium <0.150 <0.150 <0.150 2 ----
Chromium (Total)9.92 1.40 J 1.33 J 10 ----
Lead <0.849 <0.849 <0.849 15 ----
Mercury <0.100 <0.100 <0.100 1 0.18 0.75
Selenium 0.328J <0.300 <0.300 20 ----
Silver <0.0700 <0.0700 <0.0700 20 ----
Notes:
1) North Carolina Department of Environmental Quality (DEQ) 15A NCAC 02L.0202 Groundwater Standards (2L Standards) dated April 2013
2) DEQ Division of Waste Management (DWM) Vapor Intrusion Groundwater Screening Levels (GWSLs) dated January 2021Concentrations are reported in micrograms per liter (µg/L).
Compound concentrations are reported to the laboratory method detection limits.
Laboratory analytical methods are shown in parentheses.With the exception of metals, only constituents detected in at least one sample are shown in the table above.
Bold values exceed the 2L Standard.Underlined values exceed the DWM Residential and Non-Residential GWSLs.
VOCs = volatile organic compounds; SVOCs = semi-volatile organic compounds; NE = not established; -- = not applicable; BDL = below laboratory method detection limit
J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration.
µg/L
2L Standards (1) Residential
GWSLs (2)
Screening Criteria
Non-Residential
GWSLs (2)
TMW-2 / GW-DUP
4/28/2021
Downgradient - Northern Corner
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/White Point Partners (WPP)/WPP-014 Yandle Witherspoon/Brownfields Assessment/Report/Tables/Data Tables.xlsx
5/28/2021
Table 3 (Page 1 of 1)
Hart & Hickman, PC
Table 6
Summary of Soil Gas Analytical Data
Yandle-Witherspoon Supply, Inc
Charlotte, North Carolina
H&H Job No. WPP-014
Evaluation Area Screening Criteria
Sample ID SGP-1 SGP-2 SGP-3 SGP-4 SGP-5 SGP-6 SGP-8 SGP-9
Sample Date
Sample Type Exterior Soil Gas
Units
VOCs (TO-15)
<0.35 1.8 J 4.2 7.9 <0.37 <0.39 <0.39 <0.39 <0.36 <0.35 35,000
<0.55 0.63 J 0.95 J 0.93 J 0.95 J 1.3 J 0.64 J 0.81 J 0.74 J 0.74 J 25,000
<0.31 0.68 J <0.32 <0.32 <0.33 <0.35 <0.35 <0.35 <0.32 <0.31 58
1.9 J 0.85 J 4.3 10.5 3.2 1.5 J 1.9 J 1.8 J 6.7 <0.67 420
1.5 J 1.0 J 2.2 3.3 0.95 J <0.61 0.90 J 0.97 J 2.4 <0.55 420
18.4 21.7 12.9 4.4 J 25.7 6.6 <0.98 3.7 J 10.0 5.0 J 35,000
4.7 J 6.9 J 2.0 J <0.86 8.6 3.4 J 2.3 J 2.9 J 8.7 2.6 J 210
7.6 10.7 8.3 4.0 J 19.7 5.8 4.0 J 3.6 J 12.1 3.1 J NE
<0.90 <0.92 1.3 J 2.2 J <0.93 1.5 J <0.99 <0.99 2.0 J <0.90 NE
<0.61 3.7 J 0.92 J <0.62 4.0 J 1.3 J 1.2 J 1.9 J 2.0 J 0.86 J 21,000
154 138 62.8 23.1 77.6 <3.8 14.3 8.2 J <3.5 32.5 220,000
9.1 0.82 0.49 J 0.44 J 1.5 3.1 1.8 1.6 5.2 0.53 J 12
17.5 1.5 1.1 J 0.65 J 35.1 54.4 42.7 12.0 38.3 6.1 4,900
<0.29 <0.30 <0.30 <0.30 <0.31 <0.33 1.1 J 0.71 J <0.30 <0.29 350
<0.43 1.1 <0.43 <0.43 <0.44 <0.47 <0.47 <0.47 <0.43 <0.43 NE
<0.35 <0.36 <0.36 <0.36 1.9 <0.38 <0.38 <0.38 2.2 0.59 J 4
<0.16 2.0 6.0 <0.17 <0.17 <0.18 <0.18 <0.18 <0.17 <0.16 630
69.2 1.0 J 0.85 J 1.9 J 0.89 J 26.3 3.6 J 3.7 J 17.3 1.5 J 42,000
0.64 J 4.0 5.5 4.3 3.3 3.6 2.8 3.3 3.0 4.1 700
22.7 152 251 727 37.8 41.1 18.9 15.0 31.7 18.6 NE
<0.25 <0.25 <0.25 <0.25 5.3 7.6 <0.28 <0.28 3.5 <0.25 490
1.7 0.97 J 1.5 J 2.1 2.2 9.3 6.5 6.6 6.1 1.3 J 37
21.5 3.9 2.0 3.7 4.6 54.8 21.2 22.5 37.2 2.7 2,800
31.8 13.9 7.1 18.1 4.5 17.7 10.2 8.6 22.8 4.6 4,900
6.8 3.2 J 7.3 9.0 7.3 24.7 34.0 34.0 20.9 4.7 700
3.2 1.2 J 1.8 4.6 2.9 14.1 12.2 12.5 7.0 1.9 700
<0.25 1.7 3.3 0.99 J 5.6 18.7 29.5 38.5 367 7.1 21,000
<0.55 42.5 1.5 41.4 0.68 J 1.7 <0.61 <0.61 0.70 J 5.6 280
<0.34 <0.35 <0.35 2.8 1.2 J <0.38 0.65 J <0.38 <0.35 <0.34 NE
16.9 3.0 2.4 6.2 35.7 78.4 67.0 76.9 69.6 20.1 35,000
<0.37 4.0 2.7 <0.38 <0.39 <0.41 <0.41 <0.41 <0.38 <0.37 14
0.64 J 5.4 3.0 17.3 2.6 6.0 1.8 J 2.5 <0.45 5.8 NE
<0.16 <0.17 <0.17 <0.17 <0.17 <0.18 <0.18 <0.18 0.71 <0.16 5.6
Notes:
1) North Carolina Department of Environmental Quality (DEQ) Division of Waste Management (DWM) Vapor Intrusion Sub-Slab & Exterior Soil Gas Screening Levels (SGSLs) dated January 2021
Concentrations are reported in micrograms per cubic meter (µg/m3).
Compound concentrations are reported to the laboratory method detection limits.
Laboratory analytical method is shown in parentheses.
Only compounds detected in at least one sample are shown in the above table.
VOCs = volatile organic compounds; NE = not established
J = Compound was detected above the laboratory method detection limit, but below the laboratory reporting limit resulting in a laboratory estimated concentration.
Residential SGSLs (1)
µg/m3
Proposed Office BuildingProposed Multi-Family Building
4/29/2021
SGP-7/SGP-DUP
Sub-Slab Soil Gas Exterior Soil Gas
https://harthick.sharepoint.com/sites/MasterFiles-1/Shared Documents/AAA-Master Projects/White Point Partners (WPP)/WPP-014 Yandle Witherspoon/Brownfields Assessment/Report/Tables/Data Tables.xlsx
6/4/2021
Table 6 (Page 1 of 1)
Hart & Hickman, PC
BF-SW-2
BF-SW-1
TMW-2
TMW-1
SB-1
SGP-1
SGP-3
SGP-4
SGP-8
SGP-6
SGP-9
SGP-7
SGP-2
SB-2 SGP-5
BF-SW-3
BF-SED-3
BF-SED-4
BF-SED-1
BF-SED-2
SB-4
SB-3
REVISION NO. 0
JOB NO. WPP-014
DATE: 5-13-21
FIGURE NO. 3
YANDLE-WITHERSPOON SUPPLY INC.
N.BREVARD STREET AND BELMONT AVENUE
CHARLOTTE, NORTH CAROLINA
SAMPLE LOCATION MAP
LEGEND
BROWNFIELDS PROPERTY
BOUNDARY
PARCEL BOUNDARY
RAILROAD TRACK
ELEVATION CONTOUR (2 FT. MSL)
FORMER PAINT AREA
PROPOSED MULTI-FAMILY
RESIDENTIAL OR AMENITIES
BUILDING
PROPOSED OFFICE BUILDING
PROPOSED PARKING DECK
SOIL BORING LOCATION
TEMPORARY MONITORING WELL
LOCATION
SOIL GAS SAMPLE LOCATION
SURFACE WATER SAMPLE LOCATION
SEDIMENT SAMPLE LOCATION
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203704-586-0007(p) 704-586-0373(f)License # C-1269 / #C-245 GeologyNORT
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NOTES:
1. PARCEL DATA AND AERIAL IMAGERY OBTAINED FROM
MECKLENBURG COUNTY GIS, 2020.
2. ELEVATION DATA OBTAINED FROM MECKLENBURG
COUNTY LIDAR, 2013.
3. APPROXIMATE EXTENT OF THE FORMER PAINT AREA IS
BASED ON 1963 SANBORN MAP.
4. APPROXIMATE EXTENT OF PROPOSED BUILDING
FOOTPRINTS BASED ON PRELIMINARY SITE PLAN
PROVIDED BY THE PD DATED 4/20/21.
5. FT. MSL = FEET ABOVE MEAN SEA LEVEL
TRIBUTARY OF LITTLE
SUGAR CREEK
PROPOSED
PARKING DECK
PROPOSED
COURTYARD
PROPOSED POOL/
COURTYARD
N:\AAA-Master Projects\White Point Partners (WPP)\WPP-014 Yandle Witherspoon\Brownfields Assessment\Report\Figures\Site Map.dwg, Figure 4, 5/14/2021 12:29:28 PM, sperry

Appendix C Vapor Intrusion Mitigation Plan – VM-1, VM-2, and VM-3

H&H NO. WPP-014
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
SPECIFICATIONSALEXAN OPTIMIST PARK PHASE II1001 NORTH BREVARD STREETCHARLOTTE, NORTH CAROLINADEVELOPER:
TRAMMELL CROW
RESIDENTIAL
ATLANTA, GEORGIA
VM-1
PROFESSIONAL
APPROVAL
REVISION 1
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. THE VIMS SHALL BE INSTALLED IN ACCORDANCE WITH APPLICABLE BUILDING CODES.
2.CONSTRUCTION CONTRACTORS AND SUB-CONTRACTORS SHALL USE "LOW OR NO VOC" PRODUCTS AND MATERIALS, WHEN POSSIBLE. NO PRODUCTS CONTAINING TETRACHLOROETHENE OR TRICHLOROETHENE ARE PERMITTED.
3.VIMS VAPOR LINER SHALL BE MONOSHIELD™ MANUFACTURED BY LAND SCIENCE (OR, EQUIVALENT ALTERNATIVE VAPOR LINER APPROVED BY THE ENGINEER AND NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY
(DEQ); I.E., VAPORBLOCK PLUS 20 VAPOR BARRIER MANUFACTURED BY RAVEN INDUSTRIES, INC OR DRAGO WRAP 20-MIL VAPOR INTRUSION BARRIER MANUFACTURED BY STEGO INDUSTRIES, LLC). ALTERNATIVE VAPOR LINER (IF
USED) SHALL BE A POLYOLEFIN FILM DESIGNED TO PREVENT VAPOR MIGRATION THROUGH CONCRETE SLABS-ON-GRADE.
THE VAPOR LINER SHALL BE INSTALLED BY A LAND SCIENCE CERTIFIED INSTALLER AS SPECIFIED HEREIN AND PER MANUFACTURER INSTALLATION INSTRUCTIONS TO CREATE A CONTINUOUS LINER BELOW GROUND FLOOR SLABS. A
BASE COURSE CONSISTING OF CLEAN #57 (OR SIMILAR HIGH PERMEABILITY STONE APPROVED BY THE ENGINEER) SHALL BE INSTALLED BENEATH THE VIMS VAPOR LINER. IN AREAS AROUND THE SUB-SLAB PIPING AND TERRAVENT™,
THE BASE COURSE LAYER MUST BE A MINIMUM OF 4 INCHES THICK AND MUST BE THICK ENOUGH TO COVER THE SUB-SLAB PIPING AND TERRAVENT™ WITH A MINIMUM 1-INCH LAYER ABOVE AND BELOW THE PIPING AND MAT. IN
AREAS WITHOUT PIPING OR TERRAVENT™ THE BASE COURSE SHALL BE A MINIMUM OF 4 INCHES THICK.
4.ALL PENETRATIONS SHALL BE SEALED ACCORDING TO VAPOR LINER MANUFACTURER INSTALLATION INSTRUCTIONS AS FOUND IN THE MANUFACTURER INSTALLATION GUIDELINES. IF MONOSHIELD™ IS USED, SMALL PUNCTURE
HOLES SHALL BE SEALED WITH THE NITRA-CORE™ AND LARGER HOLES, TEARS, OR DAMAGE SHALL BE REPAIRED USING A PATCH THAT OVERLAPS THE DAMAGED AREA AND THEN SHALL BE SPRAYED ALONG THE SEAMS. IN AREAS
WHERE UTILITY PENETRATIONS (I.E. PIPING, DUCTS, ETC) ARE PRESENT, NITRA-CORE™ SHALL BE SPRAYED AT A THICKNESS OF 60 MIL TO PATCH THE PENETRATION WITH AN AIRTIGHT SEAL. ANY PENETRATION BANKS SEALED WITH
NITRA-CORE™WILL BE DOCUMENTED DURING INSPECTIONS. MEASUREMENTS SHALL BE COLLECTED TO DOCUMENT THE NITRA-CORE THICKNESS DURING APPLICATION AND SMOKE TESTING SHALL BE COMPLETED TO VERIFY THERE
ARE NO LEAKS IN THE MONOSHIELD™ SYSTEM.
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 TERRAVENT™ (1" BY 12") WITH
3" SCH 40 PVC AT SUB-GRADE FOUNDATIONS. ALTERNATE SUB-SLAB COLLECTION PIPING INCLUDING THREADED FLUSH JOINT OR GLUE JOINT 3" SCH 40 PVC PIPE WITH 0.020" TO 0.060" SLOT WIDTH AND 18" SLOT SPACING OR
ALTERNATE SLOT PATTERN, SCH 40 PVC PERFORATED PIPE WITH 58" OR SMALLER DIAMETER PERFORATIONS, OR SOIL GAS COLLECTOR MAT (1" x 12") WITH SIMILAR AIR FLOW CHARACTERISTICS TO THE TERRAVENT™ MAY BE USED
WITH APPROVAL BY THE DESIGN ENGINEER. FOAM PIPE SLEEVES, OR SIMILAR, SHALL BE INSTALLED AROUND HORIZONTAL PORTIONS OF PIPES THAT PENETRATE CONCRETE FOOTERS AND WALLS PER APPLICABLE STRUCTURAL
PLANS AND BUILDING CODES, OR AS OTHERWISE DIRECTED BY THE APPLICABLE PLANS AND CONSTRUCTION ENGINEERS. PIPE SLEEVES SHALL BE PROPERLY SEALED TO PREVENT A PREFERENTIAL AIR PATHWAY FROM BELOW THE
SLAB INTO THE BUILDING.
7.3" SCH 40 PVC RISER DUCT PIPING SHALL BE INSTALLED TO CONNECT EACH SLAB PENETRATION LOCATION TO A ROOFTOP EXHAUST DISCHARGE POINT WITH A SYPHON VENTILATOR (SEE DETAIL #14). ABOVE-SLAB RISER DUCT PIPE
RUNS BETWEEN THE SLAB PENETRATION AND THE ROOFTOP EXHAUST DISCHARGE SHALL BE INSTALLED PER APPLICABLE NORTH CAROLINA PLUMBING AND BUILDING CODES AND AS SPECIFIED IN THE CONSTRUCTION DOCUMENTS
AND DRAWINGS.
8.RISER DUCT PIPING SHALL EXTEND IN A VERTICAL ORIENTATION THROUGH THE BUILDING ROOF AND TERMINATE A MINIMUM OF 2 FT ABOVE THE BUILDING ROOF LINE. AN EMPIRE MODEL STAINLESS STEEL SYPHON VENTILATOR (OR
APPROVED ALTERNATE) SHALL BE INSTALLED ON THE EXHAUST DISCHARGE END OF EACH RISER DUCT PIPE. AN ADAPTOR COUPLING SHALL BE INSTALLED AT THE DISCHARGE END OF THE 3" RISER DUCT PIPE AND THE VENTILATOR
SHALL BE SECURED TO THE PVC RISER IN A VERTICAL ORIENTATION. EXHAUST DISCHARGE LOCATIONS SHALL BE A MINIMUM OF 10 FT FROM ANY OPERABLE OPENING OR AIR INTAKE INTO THE BUILDING. NOTE THAT DISCHARGE
LOCATIONS ON THE ROOFTOP DEPICTED IN THE VAPOR INTRUSION MITIGATION PLAN MAY BE REPOSITIONED AS LONG AS THE NEW POSITION MEETS THE REQUIREMENTS PRESENTED ABOVE. AN ELECTRICAL JUNCTION BOX (120V,
60Hz AC REQUIRED) SHALL BE INSTALLED NEAR THE FAN LOCATION ON THE ROOFTOP FOR CONVERSION TO ELECTRIC FANS, IF REQUIRED. ALL WIRING AND ELECTRICAL TO BE INSTALLED PER APPLICABLE BUILDING AND ELECTRICAL
CODES. PLEASE NOTE, THE SIZE AND APPEARANCE OF THE VIMS ROOF SYPHON VENTILATOR SHALL BE APPROVED BY THE OWNER PRIOR TO PURCHASE AND INSTALLATION. FOLLOWING APPROVAL VIMS ROOF VENTILATORS SHALL
BE INSTALLED AND PAINTED IN ACCORDANCE WITH THE MANUFACTURER'S WRITTEN INSTRUCTIONS AND WITH A FINISH AND COLOR SELECTED BY THE ARCHITECT.
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 MAINTENANCE". THE SYPHON
VENTILATOR SHALL BE LABELED WITH "VAPOR MITIGATION SYSTEM - CONTACT MAINTENANCE IF DAMAGED".
10.NO COMPONENT OF THE VIMS SHALL BE COVERED WITHOUT BEING INSPECTED AND APPROVED BY THE ENGINEER OR ENGINEER'S DESIGNEE. 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 AND VENT PIPE CONNECTIONS. IN
ADDITION THE ENGINEER OR ENGINEER'S DESIGNEE SHALL BE PRESENT DURING SMOKE TESTING. THE CONSTRUCTION CONTRACTOR(S) SHALL COORDINATE WITH THE ENGINEER TO PERFORM THE REQUIRED INSPECTIONS.
DECEMBER 8, 2021
VIMS VAPOR LINER AND BASE COURSE (TYP)1
BASE COURSE - CLEAN #57 STONE
MIN 4" THICK BENEATH VIMS VAPOR LINER
VAPOR LINER (SEE SPECIFICATION #3)
CONCRETE FLOOR SLAB
NTSVM2
SUBBASE
CONCRETE FLOOR SLAB
VIMS SUB-SLAB VENT (TYP)2
TERRAVENT WITHIN BASE COURSE -
MIN 4" THICKNESS TO COVER VENT
WITH MIN 1-INCH ABOVE AND BELOW
(SEE SPECIFICATIONS #3 & #6)
VAPOR BARRIER (SEE SPECIFICATION #3)
SUBBASE
NTS
CONCRETE FLOOR SLAB
VM2
SECTION THROUGH EXTERIOR WALL
NTSVM2
BRICK OR BUILDING SIDING
EXTERNAL WALL (NOT
PRESENT AT ALL LOCATIONS)
STUD WALL BASE COARSE
(SEE SPECIFICATION #3)
VAPOR BARRIER SEALED TO CONCRETE PER
MANUFACTURER INSTRUCTIONS.
SUBBASE
3
VAPOR LINER SHALL EXTEND ALONG
FOOTING EXTERIOR IF POSSIBLE AT
LOCATIONS WHERE EXTERIOR GRADE
IS HIGHER THAN INTERIOR GRADE
4A
NTSVM2
2" SCH 40 PVC 90 DEGREE ELBOW
VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
2" VENT SCREEN AT
END OF PIPE
EXTERNAL/STUD WALL
(NOT PRESENT IN ALL
LOCATIONS)
2" SOLID SCH 40 PVC
VACUUM MEASURING POINT
POSITION VACUUM
MONITORING POINT SO VENT
SCREEN IS AT LEAST 5 FT FROM
AN EXTERNAL WALL
2' MIN
EXTERNAL/STUD WALL
(NOT PRESENT IN ALL
LOCATIONS)
FLOOR CLEANOUT, ADJUSTABLE,
4" DIA ZURN INDUSTRIES
MODEL #CO2450-PV4 (OR ENGINEER
APPROVED EQUIVALENT)FLUSH WITH
FINISHED FLOOR
4B
NTSVM2
2" SCH 40 PVC 90 DEGREE ELBOW
VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
2" VENT SCREEN AT
END OF PIPE
STUD WALL
(NOT PRESENT IN ALL
LOCATIONS)
VACUUM MEASURING POINT THROUGH THICKENED SLAB
FLOOR CLEANOUT, ADJUSTABLE,
4" DIA ZURN INDUSTRIES
MODEL #CO2450-PV4 (OR ENGINEER
APPROVED EQUIVALENT)
FLUSH WITH
FINISHED FLOOR
2" SOLID SCH 40 PVC
- INCLUDE PIPE
SLEEVES WHEN
APPLICABLE; SEE
SPECIFICATION #6
VIMS VACUUM MEASURING POINT - DETAIL VIEW
NTSVM2
5
FINISHED FLOOR SLAB
2" SCH 40 PVC SET WITHIN GRAVEL LAYER
(SEE DETAILS 4A & 4B)
2" DRAIN EXPANSION TEST PLUG
BASE COURSE
(SEE SPECIFICATION #3)
FLOOR CLEANOUT, ADJUSTABLE, 4" DIA ZURN
INDUSTRIES MODEL #CO2450-PV4 (OR
ENGINEER APPROVED EQUIVALENT) FLUSH
WITH FINISHED FLOOR
4" x 2" FLUSH REDUCER
BUSHING
VAPOR BARRIER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
2" SCH 40 PVC 90 DEGREE STREET ELBOW
VAPOR LINER PENETRATION SEALED
TO PIPE PER MANUFACTURER
INSTRUCTIONS
STUD WALL
(NOT PRESENT IN ALL LOCATIONS)
VAPOR LINER
BENEATH
THICKENED SLAB
HORIZONTAL PIPE THROUGH THICKENED SLAB
TOP OF THICKENED
SLAB TURNDOWN
FIRE WALL (NOT PRESENT
IN ALL LOCATIONS)
3" SOLID SCH 40 PVC -
INCLUDE PIPE SLEEVES
WHEN APPLICABLE; SEE
SPECIFICATION #6
6
VM2 NTS
TERRAVENT
TERRAVENT
TO SOLID 3"
SCH 40 PVC
CONNECTION
VERTICAL RISER AT SLAB PENETRATION WITH 90 DEGREE ELBOW
NTS
VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
3" SCH 40 PVC 90 DEGREE ELBOW
STUD WALL
3" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #8 & #9)
BASE COARSE
(SEE SPECIFICATION #3)
THICKENED SLAB MAY NOT BE PRESENT IN
ALL LOCATIONS
3" SOLID SCH 40 PVC
(SEE SPECIFICATION #7)
VM2
8
TERRAVENT TO SOLID 3" SCH
40 PVC CONNECTION
VERTICAL RISER AT SLAB PENETRATION WITH TEE
NTS
VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
3" SCH 40 PVC 90 DEGREE TEE
STUD WALL
3" SCH 40 PVC RISER DUCT PIPE
(SEE SPECIFICATION #7)
THICKENED SLAB MAY NOT BE PRESENT IN ALL
LOCATIONS
3" SOLID SCH 40 PVC
(SEE SPECIFICATION #6)
10
VM2
TERRAVENT TO SOLID 4" SCH 40 PVC
PIPE TRANSITION (SLIP COUPLING
OR THREADED JOINT)
BASE COURSE
TERRAVENT TO SOLID 4" SCH
40 PVC CONNECTION
BASE COURSE
(SEE SPECIFICATION #3)
VAPOR BARRIER SEALED TO CONCRETE
PER MANUFACTURER INSTRUCTIONS
VAPOR LINER SEALED TO COLUMN PER
MANUFACTURER INSTRUCTIONS
TYPICAL VIMS LINER ABOVE COLUMN FOOTING11
NTSVM2
TYPICAL VIMS LINER AT ELEVATOR PIT12
NTSVM2
WATERPROOFING
ELEVATOR SUMP
CONTINUOUS VAPOR LINER
SEALED PER MANUFACTURER
INSTRUCTIONS
VAPOR LINER SEALED TO
WATERPROOFING
WATERPROOFING - POST
APPLIED
VAPOR BARRIER SEALED TO CONCRETE
VIMS SYPHON VENTILATOR & EXHAUST (TYP)14
VM2 NTS
ELECTRICAL JUNCTION BOX FOR POTENTIAL
FUTURE VACUUM FAN (REFER TO
SPECIFICATION #8)
RISER DUCT PIPE THROUGH ROOF
FLASHING
ROOFTOP
4" X3" HEAVY
DUTY NO HUB
COUPLING
4" SYPHON VENTILATOR (EMPIRE SYPHON
VENTILATOR OR ENGINEER APPROVED
EQUIVALENT)
VIMS PIPING THROUGH SLAB DROP WITH RISER DUCT PIPING (TYP)
NTS
9
VM2
SUB-BASE
VAPOR LINER
BASE COURSE
(SEE SPECIFICATION #3)
TERRAVENT TO SOLID 3" SCH 40
PVC PIPE TRANSITION
3" SCH 40 PVC
90-DEGREE ELBOW
VAPOR LINER SEALED TO PIPE
PER MANUFACTURER
INSTRUCTIONS
SOLID 3" SCH 40 PVC
(SEE SPECIFICATION #7)STUD WALLS
SOLID 3" SCH 40 PVC
RISER DUCT PIPE
(SEE SPECIFICATION #7)
3" SCH 40 PVC
90-DEGREE TEE
THICKENED SLAB TRANSITION7
NTSVM2
BASE COARSE
(SEE SPECIFICATION #3)
FIRE WALL PRESENT IN
SOME AREAS
STUD WALL
VAPOR LINER PENETRATION SEALED TO
PIPE PER MANUFACTURER INSTRUCTIONS
3" SCH 40 PVC 45 DEGREE ELBOW
SLAB STEP HEIGHT VARIES
3" SOLID SCH 40 PVC
(SEE SPECIFICATION #6)
TERRAVENT TO SOLID 3" SCH 40
PVC PIPE TRANSITION
TERRAVENT TO SOLID 3" SCH 40
PVC PIPE TRANSITION
SECTION THROUGH SLAB EDGE AT PARKING GARAGE
NTSVM2
STUD WALL BASE COARSE
(SEE SPECIFICATION #3)
VAPOR LINER SEALED TO CONCRETE PER
MANUFACTURER INSTRUCTIONS.
SUBBASE
13
VAPOR LINER SHALL EXTEND ALONG
FOOTING EXTERIOR TO SLAB GRADE
CONDITION VARIES
AT PARKING GARAGE
H&H NO. WPP-014
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
DETAILSALEXAN OPTIMIST PARK PHASE II1001 NORTH BREVARD STREETCHARLOTTE, NORTH CAROLINADEVELOPER:
TRAMMELL CROW
RESIDENTIAL
ATLANTA, GEORGIA
VM-2
PROFESSIONAL
APPROVAL
REVISION 1
DECEMBER 8, 2021
UP
+708+709+700
+707 +704+703+704
ENTRY
3
UP
Slope 6.62%
1:13.5 (7.4%)1'-0" STEP 1:13.5 (7.4%)1'-0" STEP+701
1:13.5 (7.4%)1'-0" STEP1:13.5 (7.4%)1'-0" STEP1:20 (5%)1'-0" STEP1:13.5 (7.4%)1'-0" STEP
+
706
1:13.5 (7.4%)1'-0" STEP1:20 (5%)1'-0" STEP+7051:13.5 (7.4%)2'-0" STEP1:13.5 (7.4%)2'-0" STEP
(7.4%)6" STEP
1:20 (5%)1'-0" STEP+706.5+706
+7021:13.5 (7.4%)1'-0" STEP
+702.5+708 UPSlope 6.62%UPSlope 6.62%
+702
+703'
PLAZA
+705.5
1:20 (5%)1'-0" STEP1:13.5 (7.4%)1'-0" STEP +702(7.4%)6" STEP
+7001:13.5 (7.4%)2'-0" STEP1:2
0

(5%
)1'-0
"

S
T
E
P
+698
+699
1:1
3
.5

(7
.
4%
)
1'-0
"
STEP
OFFICE BUILDING N.I.C.
4(2C)
BIKE STORAGE
LOBBY ELEV.
ELEV.
400
LOBBY
STAIR 300STAIR 400BIKE
REPAIR
MEP
ELEV.
STAIR 200
STO.
POOL
EQUIPMENT
CHEM.STORAGEELEV.
200
LOBBY
MEP
MEP
+704.5 +703.5
1:13.5 (7.4%)1'-6" STEP
(7.4%)6" STEP 1:20 (5%)1'-6" STEP
E-1
MP-8
TMP-1
MP-3
MP-7
MP-5
MP-1
E-2
E-3
E-4
E-8
E-7
E-11
E-9
E-10
E-5 E-6
E-15
E-16 E-17
E-18
E-14
E-13
E-12
MP-2
MP-6
MP-4
TMP-2
MP-9
TMP-4
TMP-3
TMP-5
H&H NO. WPP-014
VAPOR MITIGATION PLAN
PREPARED BY:
2923 South Tryon Street-Suite 100
Charlotte, North Carolina 28203
704-586-0007(p) 704-586-0373(f)
License # C-1269 / #C-245 Geology
VAPOR INTRUSION
MITIGATION SYSTEM
PLAN VIEW LAYOUTS
LEVEL 1ALEXAN OPTIMIST PARK PHASE II1001 NORTH BREVARD STREETCHARLOTTE, NORTH CAROLINADEVELOPER:
TRAMMELL CROW
RESIDENTIAL
ATLANTA, GEORGIA
VM-3
PROFESSIONAL
APPROVAL
LEGEND
OUTDOOR OR OPEN AIR
OFFICE AREA EXCLUDED FROM VIMS
EXTENT OF VAPOR LINER
SOIL GAS COLLECTION SYSTEM (SEE
SPECIFICATION #6 ON VM-1)
3" DIA SCH 40 SOLID PVC VERTICAL RISER
WITH FAN IDENTIFICATION NUMBER (REFER
TO DETAIL NUMBER 23 ON SHEET VM-3A)
2" DIA SOLID PVC PRESSURE MONITORING
POINT WITH FLUSH-MOUNTED COVER
2" DIA SOLID PVC PRESSURE MONITORING
POINT WITH FLUSH-MOUNTED COVER -
PROPOSED SUB-SLAB SOIL GAS SAMPLE
LOCATION
PROPOSED INDOOR AIR SAMPLE LOCATION
E-7
MP-4
8
VM2
11
VM2
2
VM2
1
VM2
10
VM2
4A
VM2
4A
VM2
6
VM2
4B
VM2
2
VM2
6
VM2
3
VM2
3
VM2
10
VM2
4B
VM2
12
VM2
12
VM2
MP-4
9
VM2
7
VM2 VM2
9
13
VM2
REVISION 1
DECEMBER 8, 2021

Appendix D Vapor Intrusion Mitigation System Product Specifications
Client:
Project:
Date:
Submitted By:
®
Vapor Intrusion Barrier System
MonoShield
MonoShield®

02 56 19.13-1
MonoShield®
Vapor Intrusion Barrier 02 56 19.13Geo-Composite & Fluid
Applied Gas Barrier
Version 2.0
Note:If membrane will be subjected to hydrostatic pressure,please contact Land Science™for proper recommendations.
PART 1 –GENERAL
1.1 RELATEDDOCUMENTS
A.Drawings andgeneral provisions of the contract,including general and supplementary conditions and Division1 specificationsections,apply tothis section.
1.2 SUMMARY
A.This section includes the following:
1.Substrate preparation:2.Vapor intrusionbarrier components:3.Seam sealer and accessories.
B.Related Sections:Thefollowing sections contain requirements that relate to this section:
1.Division 2Section “Earthwork”,“Pipe Materials”,“Sub-drainage Systems”,“Gas Collection Systems”:2.Division 3Section “Cast-in-Place Concrete”for concrete placement,curing,and finishing:3.Division 5Section “Expansion Joint Cover Assemblies”,for expansion-joint covers assemblies and installation.
1.3 PERFORMANCEREQUIREMENTS
A.General:Provide a vaporintrusion barrier system that prevents the passage of methane gas and/or volatile organic compound
vapors and complies with physical requirements as demonstrated bytesting performed by an independent testing agency ofmanufacturer’s current vapor intrusion barrier formulations and system design.
1.4 SUBMITTALS
A.Submit product data for each type of vapor intrusion barrier,including manufacturer’s printed instructions for evaluating andpreparingthesubstrate,technicaldata,andtested physical and performance properties.
B.Project Data -Submit shop drawings showing extent of vapor intrusion barrier,including details for overlaps,flashing,penetrations,and other termination conditions.
C.Samples –Submit representative samples of the followingfor approval:
1.Vapor intrusion barrier components.
D.Certified Installer Certificates –Submit certificates signed by manufacturer certifying that installers comply with requirementsunderthe“Quality Assurance”article.
1.5 QUALITYASSURANCE
A.Installer Qualifications:Engage an experiencedinstaller who has been trained and certified in writingby the membranemanufacturer,Land Science™for the installation of the MonoShield™System.
B.Manufacturer Qualification:Obtain vapor intrusion barrier materials and system components from a single manufacturersourceLandScience.
C.Field Sample:Apply vapor intrusion barrier system field sample to 1000 ft2 (93 m2)of field area demonstrate application,detailing,thickness,texture,and standard of workmanship.
1.Notifyengineer or special inspector one week in advance of the dates and times when field sample will be prepared.
2.If engineer or special inspector determines that field sample,does not meet requirements,reapply field sample untilfieldsampleisapproved.
3.Retain and maintain approved field sample during construction in an undisturbed condition as a standard for judging thecompletedmethaneandvaporintrusionbarrier.An undamaged field sample may become part of the completed work.
D.Pre-installation Conference:A pre-installation conference shall be heldprior to application of the vapor intrusion barriersystemtoassurepropersiteandinstallationconditions,to includecontractor,applicator,architect/engineer,other tradesinfluencedbyvaporintrusionbarrierinstallationandspecialinspector(if any).
02 56 19.13-2
1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to project site as specified by manufacturer labeled with manufacturer’s name, product brand
name and type, date of manufacture, shelf life, and directions for storing and mixing with other components.

B. Store materials as specified by the manufacturer in a clean, dry, protected location and within the temperature
range required by manufacturer. Protect stored materials from direct sunlight. If freezing temperatures are
expected, necessary steps should be taken to prevent the freezing of the Nitra-Core and Nitra-Core Detail
components.

C. Remove and replace material that cannot be applied within its stated shelf life.

1.7 PROJECT CONDITIONS

A. Protect all adjacent areas not to be installed on. Where necessary, apply masking to prevent staining of
surfaces to remain exposed wherever membrane abuts to other finish surfaces.

B. Perform work only when existing and forecasted weather conditions are within manufacturer’s
recommendations for the material and application method used.

C. Minimum clearance of 24 inches is required for application of product. For areas with less than 24-inch
clearance, the membrane may be applied by hand using Nitra-Core Detail.

D. Ambient temperature shall be within manufacturer’s specifications. (Greater than +45ºF/+7ºC.) Consult
manufacturer for the proper requirements when desiring to apply Nitra-Core below 45ºF/7ºC.

E. All plumbing, electrical, mechanical and structural items to be under or passing through the vapor intrusion
barrier system shall be positively secured in their proper positions and appropriately protected prior to
membrane application.

F. Vapor intrusion barrier shall be installed before placement of fill material and reinforcing steel. When not possible,
all exposed reinforcing steel shall be masked by general contractor prior to membrane application.

G. Stakes used to secure the concrete forms shall not penetrate the vapor intrusion barrier system after it has been
installed. If stakes need to puncture the vapor intrusion barrier system after it has been installed, the necessary
repairs need to be made by a certified MonoShield applicator. To confirm the staking procedure is in agreement
with the manufactures recommendation, contact Land Science.

1.8 WARRANTY

A. General Warranty: The special warranty specified in this article shall not deprive the owner of other rights the owner
may have under other provisions of the contract documents, and shall be in addition to, and run concurrent with,
other warranties made by the contractor under requirements of the contract documents.

B. Special Warranty: Submit a written warranty signed by vapor intrusion barrier manufacturer agreeing to repair or
replace vapor intrusion barrier that does not meet requirements. Warranty does not include failure of vapor
intrusion barrier due to failure of substrate prepared and treated according to requirements or formation of new
joints and cracks in the attached to structures that exceed 1/16 inch (1.58 mm) in width.

1. Warranty Period: 1 year after date of substantial completion. Longer warranty periods are available upon
request to the manufacturer.

C. Extended material warranties are available upon request to the manufacturer.
PART 2 – PRODUCTS
2.1 MANUFACTURERS

A. MonoShield™ System; Land Science™, San Clemente, CA. [phone]

1. MonoBase Layer
2. Nitra-Core layer and Nitra-Core Detail
3. Protective layer (optional – contact Land Science for site specific recommendations)

2.2 VAPOR INTRUSION BARRIER SHEET MATERIALS

A. The MonoShield™ System is a 30-mil composite geomembrane comprise of flexible chemically resistant
metalized film laminated to a geotextile, a copolymer polyethylene and tear resistant PET reinforcement grid
structure.

B. Sheet Course Usage

1. As foundation base layer, made to receive the Nitra-Core layer between seams.

02 56 19.13-3

MonoBase Properties

PROPERTIES TEST METHOD MonoBase

Composite Thickness MFX internal Method 30 mil
Layer Thickness MFX internal Method 22 mil
Weight EN1849-2 13 oz./SY
Colors Metallic Gray/Black Geotextile
Tensile Strength (Grab) ASTM D751 - Procedure A MD – 236 lbs.
CD – 247 lbs.
Elongation ASTM D751 – Procedure A MD – 81%
CD – 20%
Tear Resistance ASTM D5884 MD – 26 lbs.
CD – 30 lbs.
Fire Properties EN13501-1 Class F
UV Stability 6 Months Free Outdoor Exposure
Methane Permeability ASTM D1434 105 (mL(STP)/m2.d.atm)
Benzene Diffusion Coefficient GeoKinetics Method 2.1 x 10-18 m2/sec
TCE Diffusion Coefficient GeoKinetics Method 2.89 x 10-17 m2/sec
Chemical Resistance Excellent
Packaging: Dimension: 9.84’ x 164’ Weight: 143 lbs.

2.3 VAPOR INTRUSION BARRIER SPRAY MATERIALS

A. Fluid applied vapor intrusion barrier system – Nitra-Core; a single course, high build, polymer modified, nitrile latex
and asphalt emulsions. Waterborne and spray applied at ambient temperatures. A nominal thickness of 60 dry
mils between MonoBase seams, unless specified otherwise. Non-toxic and odorless, Nitra-Core Detail has similar
properties with greater viscosity and is roller or brush applied. Manufactured by Land Science.

Nitra-Core Properties

PROPERTIES TEST METHOD NITRA-CORE
Application to MonoBase 60 mils (17 ft2/gal) at seams

Typical Uncured Properties
Specific Gravity ASTM D 244 1.0
Brookfield Viscosity ASTM D2196 75 – 90 centipoises
pH Oakton 10 – 13
Residue Content ASTM D2939 62 – 65%
Color Brown to Black
Demulsibility ASTM D6936 35 – 40%
Non-Toxic No Solvent
Shelf Life 6 months

Typical Cured Properties with
MonoBase
Benzene Diffusion Coefficient Land Science Internal Method 2.1 x 10-18 m2/sec
TCE Diffusion Coefficient GeoKinetics Method 2.89 x 10-17 m2/sec
Methane Permeability ASTM D1434 105 (mL(STP)/m2.d.atm)
Packaging: 55 gal. drums and 275 gal. totes
02 56 19.13-4

2.4 AXILLARY MATERIALS

A. Sheet Flashing: 60-mil reinforced modified asphalt sheet good with double-sided adhesive.

B. Detailing Fabric: Manufacturer’s recommended polypropylene and polyester fabric.

C. Gas Venting Materials: TerraVent and associated fittings.

PART 3 – EXECUTION
3.1 AUXILIARY MATERIALS

A. Examine substrates, areas, and conditions under which vapor intrusion barrier will be applied, with installer
present, for compliance with requirements. Do not proceed with installation until unsatisfactory conditions
have been corrected.

3.2 SUBGRADE SURFACE PREPARATION

A. Verify substrate is prepared according to manufacturer’s recommendations. On a horizontal surface, the substrate
should be free from material that can potentially puncture the vapor intrusion barrier. Additional protection or
cushion layers might be required if the earth or gravel substrate contains too many jagged points and edges that
could puncture one or more of the system components. Contact manufacturer to confirm substrate is within
manufactures recommendations.

B. MonoShield™ System can accommodate a wide range of substrates, including but not limited to compacted earth,
sand, aggregate, and mud slabs.

1. Compacted Earth: Remove pieces of debris, gravel and/or any other material that can potentially puncture
the MonoBase prior to application.

2. Sand: A sand subgrade requires no additional preparation, provided any material that can potentially
puncture MonoBase not present.

3. Aggregate: Contact the manufacturer to ensure the aggregate layer will not be detrimental to the MonoBase. The gravel layer must be compacted and rolled flat. Ideally a ¼” minus gravel layer with
rounded edges should be specified; however MonoBase can accommodate a wide variety of different
substrates. Contact Land Science if there are questions regarding the compatibility of MonoBase and the
utilized substrate. Exercise caution when specifying pea gravel under the membrane, if not compacted
properly, pea gravel can become an unstable substrate. NOTE: Angular substrates will likely require the
use of a 4 oz. geotextile cushion layer, contact Land Science for additional information.

4. Mudslabs: The use of a mubslab under the MonoBase is acceptable, contact Land Science for job specific
requirements.
C. Mask off adjoining surface not receiving the vapor intrusion barrier system to prevent the spillage or over spray
affecting other construction.

D. Earth, sand or gravel subgrades should be prepared and compacted to local building code requirements.

3.3 PREPARATIONS AND TREATMENT OF TERMINATIONS

A. Prepare the substrate surface in accordance with Section 3.3 of this document. Concrete surfaces that are not a light
trowel, light broom or equivalent finish, will need to be repaired.

B. Terminations on horizontal and vertical surfaces should extend 6” onto the termination surface. Job specific conditions
may prevent a 6” termination. In these conditions, contact manufacturer for recommendations.

C. Apply 60 mils of Nitra-Core to the terminating surface and then embed the MonoBase by pressing it firmly into the Nitra-
Core layer. Next, apply 30 mils of Nitra-Core spray applied on MonoBase over the edge of the termination. For further
clarification, refer to the termination detail provided by manufacturer.

D. The stated termination process is appropriate for terminating the membrane onto exterior footings, pile caps, interior
footings and grade beams. When terminating the membrane to stem walls or vertical surfaces the same process
should be used.

3.4 PREPARATIONS AND TREATMENT OF PENETRATIONS

A. All pipe penetrations should be securely in place prior to the installation of the MonoBase. Any loose penetrations
02 56 19.13-5
should be secured prior to MonoBase, as loose penetrations could potentially exert pressure on the membrane and
damage the membrane after installation.

B. To properly seal around penetrations, cut a piece of the MonoBase that will extend 6” beyond the outside perimeter of
the penetration. Cut a hole in the MonoBase just big enough to slide over the penetration, ensuring the MonoBase fits
snug against the penetration, this can be done by cutting an “X” no larger than the inside diameter of the penetration.
There should not be a gap larger than a 1/8” between the MonoBase and the penetration. Other methods can also be
utilized, provided, there is not a gap larger than 1/8” between the MonoBase and the penetration.

C. Seal the MonoBase using Nitra-Core spray applied or Nitra-Core Detail to the underlying cut piece of MonoBase.

D. Apply one coat of Nitra-Core spray or Nitra-Core Detail to the MonoBase and around the penetration at a thickness
of 30 mils. Penetrations should be treated in a 6-inch radius around penetration and 3 inches onto penetrating
object.

E. Embed a Detail Fabric strip after the first application of the Nitra-Core spray applied or Nitra-Core Detail material
and then apply a second 30 mil coat over the embedded joint reinforcing strip ensuring its complete saturation of
the embedded strip and tight seal around the penetration.

F. A cable tie should then be placed around the finished penetration. The cable tie should be snug, but not overly
tight so as to slice into the finished seal.

OPTION: A final application of Nitra-Core spray may be used to provide a finishing seal after the protective layer has
been installed.

NOTE: Metal or other slick penetration surfaces may require treatment in order to achieve proper adhesion. For plastic
pipes, sand paper may be used to achieve a profile, an emery cloth is more appropriate for metal surfaces. An emery cloth
should also be used to remove any rust on metal surfaces.

3.5 MONOBASE INSTALLATION

A. Install the MonoBase over substrate material in one direction with six-inch overlaps.

B. Secure the MonoBase layer by applying 60 mils of Nitra-Core tween the 6” overlapped sheets.

C. Visually verify there are no gaps/fish-mouths in seams.

D. For best results, install an equal amount of MonoBase and Nitra-Core in one day. Leaving the MonoBase
unsprayed overnight might allow excess moisture to collect on the MonoBase. If excess moisture collects, it
needs to be removed.

NOTE: In windy conditions it might be necessary to encapsulate the seam by spraying the Nitra-Core layer over the
completed MonoBase seams.

3.6 NITRA-CORE APPLICATION

A. Set up spray equipment according to manufacturer’s instructions.

B. Mix and prepare materials according to manufacturer’s instructions.

C. The two catalyst nozzles (8001) should be adjusted to cross at about 18" from the end of the wand. This apex of
catalyst and emulsion spray should then be less than 24" but greater than 12” from the desired surface when spraying.
When properly sprayed the fan pattern of the catalyst should range between 65° and 80°.

D. Adjust the amount of catalyst used based on the ambient air temperature and surface temperature of the substrate
receiving the membrane. In hot weather use less catalyst as hot conditions will quickly “break” the emulsion and
facilitate the curing of the membrane. In cold conditions and on vertical surfaces use more catalyst to “break” the
emulsion quicker to expedite curing and set up time in cold conditions.

E. To spray Nitra-Core layer, pull the trigger on the gun. A 42° fan pattern should form when properly sprayed. Apply one
spray coat of Nitra-Core to obtain a seamless membrane free from pinholes or shadows, with an average dry film
thickness of 60 mils (1.52 mm).

F. Apply the Nitra-Core layer in a spray pattern that is perpendicular to the application surface. The concern when spraying
at an angle is that an area might be missed. Using a perpendicular spray pattern will limit voids and thin spots and will
also create a uniform and consistent membrane.

G. The seams will generally cure in 24 to 48 hours. As a rule, when temperature decreases or humidity increases, the
curing of the membrane will be prolonged. The membrane does not need to be fully cured prior to smoke test.

H. Do not penetrate membrane after it has been installed. If membrane is penetrated after the membrane is
installed, it is the responsibility of the general contractor to notify the certified installer to make repairs.
I. Conducting smoke tests on the barrier is recommended with general emphasis towards the seams,
02 56 19.13-6
penetrations, and perimeter terminations. Land Science recommends conducting smoke tests every 5,000-
10,000 square feet or a minimum of two per building structure (if less than 5,000 square feet in size). The
square footage for testing can be increased upon successful smoke tests conducted initially at a 5,000 square
foot area.

NOTE: Care should be taken to not trap moisture between the layers of the membrane. Trapping moisture may
occur from applying a second coat prior to the membrane curing. Repairs and detailing may be done over the Nitra-
Core layer when not fully cured.

3.7 PROTECTION LAYER INSTALLATION (optional)

A. Install protective course over MonoBase before starting subsequent construction operations.

B. Sweep off any water that has collected on the surface of the MonoBase prior to the placement of the protective course.

C. Overlap and seam the protective layer in the same manner as the MonoBase.

3.8 QUALITY ASSURANCE

A. The MonoShield™ system must be installed by a trained and certified installer approved by Land Science.

B. For projects that will require a material or labor material warranty, Land Science will require a manufacturer’s
representative or certified 3rd party inspector to inspect and verify that the membrane has been installed per the
manufacturer’s recommendations.
The certified installer is responsible for contacting the inspector for inspection. Prior to application of the
membrane, a notice period for inspection should be agreed upon between the applicator and inspector.

C. Smoke Testing is highly recommended and is the ideal way to test the seal created around penetrations and
terminations. Smoke Testing is conducted by pumping non-toxic smoke underneath the MonoShield™ system and
then repairing the areas where smoke appears. Refer to smoke testing protocol provided by Land Science. For
projects that will require an extended material warranty, Land Science will require a smoke test.

D. Visual inspections prior to placement of concrete, but after the installation of concrete reinforcing, is recommended
to identify any punctures that may have occurred during the installation of rebar, post tension cables, etc.
Punctures in the MonoShield™ system should be easy to identify due to the color contrasting layers of the system.
02 56 19 © 2018 Land Science
TerraVent™ SOIL GAS COLLECTION SYSTEM Version 2.0

SECTION 02 56 19 – GAS CONTROL
PART 1 – GENERAL
1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1
Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Substrate preparation.
2. TerraVent™ installation.
3. TerraVent accessories.

B. Related Sections: The following Sections contain requirements that relate to this Section:

1. Division 2 Section “Earthwork”, “Pipe Materials”, “Sub-drainage systems”, ”Gas Control System”, “Fluid-Applied gas
barrier”.
2. Division 3 Section “Cast-in-Place Concrete” for concrete placement, curing, and finishing.
3. Division 5 Section “Expansion Joint Cover Assemblies”, for expansion-joint covers assemblies and installation.

1.3 PERFORMANCE REQUIREMENTS

A. General: Provide a gas venting material that collects gas vapors and directs them to discharge or to collection points as
specified in the gas vapor collection system drawings and complies with the physical requirements set forth by the
manufacturer.

1.4 SUBMITTALS

A. Submit Product Data for each type of gas venting system specified, including manufacturer’s specifications.

B. Sample – Submit representative samples of the following for approval:

1. Gas venting, TerraVent.
2. TerraVent accessories.

1.5 QUALITY ASSURANCE

A. Installer Qualifications: Engage an experienced Installer who is certified in writing and approved by vapor intrusion barrier
manufacturer Land Science for the installation of the MonoShield™ system.

B. Manufacturer Qualification: Obtain gas venting, vapor intrusion barrier and system components from a single
manufacturer Land Science.

C. Pre-installation Conference: A pre-installation conference shall be held prior to installation of the venting system, vapor
intrusion barrier and waterproofing system to assure proper site and installation conditions, to include contractor,
applicator, architect/engineer and special inspector (if any).

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to project site as specified by manufacturer labeled with manufacturer’s name, product brand name and
type, date of manufacture, shelf life, and directions for handling.
02 56 19 © 2018 Land Science
B. Store materials as specified by the manufacturer in a clean, dry, protected location and within the temperature
range required by manufacturer. Protect stored materials from direct sunlight.

C. Remove and replace material that is
damaged. PART 2 – PRODUCTS
2.1 MANUFACTURER

A. Land Science, San Clemente, CA. [phone]

1. TerraVent™

2.2 GAS VENT MATERIALS

A. TerraVent – TerraVent is a low profile, trenchless, flexible, sub slab vapor collection system used in lieu or in
conjunction with perforated piping. TerraVent is recommended for sites with aggressive chlorinated volatile organic or
petroleum vapors. Manufactured by Land Science.

B. TerraVent physical properties

PROPERTIES TEST METHOD TerraVent

Vent Core Properties
Compressive Strength ASTM D-1621 9,500 psf.
Thickness 1 inch
Flow Rate - Hydraulic gradient - 0.1 ASTM D-4716 30 gpm/ft width

Vent Fabric Properties
Grab Tensile Strength ASTM D-4632 100 lbs.
CBR Puncture ASTM D-6241 250 lbs.
Flow ASTM D-4491 140 gpm/ft2
AOS ASTM D-4751 70 U.S Sieve
Permittivity ASTM D-4491 2.0 sec-1
U.V Resistance ASTM D-4355 70% @500 hrs.
Packaging: Dimension: 12”x 165’
Weight: 68 lbs.

2.3 AUXILIARY MATERIALS

A. TerraVent End Outlet

B. Reinforced Fabric Tape.
PART 3 – EXECUTION
02 56 19 © 2018 Land Science
3.1 EXAMINATION

A. Examine substrates, areas, and conditions under which gas vent system will be installed, with installer present, for
compliance with requirements. Do not proceed with installation until unsatisfactory conditions have been corrected.

3.2 SUBSTRATE PREPARATION

A. Verify substrate is prepared according to project requirements.

3.3 PREPARATION FOR STRIP COMPOSITE

A. Mark the layout of strip geocomposite per layout design developed by engineer.

3.4 STRIP GEOCOMPOSITE INSTALLATION

A. Install TerraVent over substrate material where designated on drawings with the flat base of the core placed up and
shall be overlapped in accordance with manufacturer’s recommendations.

B. At areas where TerraVent strips intersect cut and fold back fabric to expose the dimpled core. Arrange the strips so
that the top strip interconnects into the bottom strip. Unfold fabric to cover the core and use reinforcing tape, as
approved by the manufacturer, to seal the connection to prevent sand or gravel from entering the core.

C. When crossing TerraVent over footings or grade beams, consult with the specifying environmental engineer and structural engineer for appropriate use and placement of solid pipe materials. Place solid pipe over or through
concrete surface and attach a TerraVent End Outlet at both ends of the pipe before connecting the TerraVent to the pipe
reducer. Seal the TerraVent to the TerraVent End Outlet using fabric reinforcement tape. Refer to TerraVent detail
provided by Land Science.

D. Place vent risers per specifying engineer’s project specifications. Connect TerraVent to TerraVent End Outlet and seal
with fabric reinforced tape. Use TerraVent End Outlet with the specified diameter piping as shown on system drawings.

3.5 PLACEMENT OF OVERLYING AND ADJACENT MATERIALS

A. All overlying and adjacent material shall be placed or installed using approved procedures and guidelines to prevent
damage to the strip geocomposite.

B. Equipment shall not be directly driven over and stakes or any other materials may not be driven through the strip
geocomposite.
MonoShield® Technical Data Sheet
•

•

•

•

TECHNICAL DATA
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
The MonoShield System is a 30-mil composite geomembrane comprised of flexible chemically
system for low-level contaminated sites. It is designed and installed over the substrate with the
MonoBase is seamed together with a 6” overlap and bonded using Land Science’s NitraCore at
60-mil thickness; applying the core to both above and below the barrier overlaps.
MonoBase is overlapped at all perimeters a minimum of 3” onto t
adherence using the Nitrile Core.
ecommended to ensure the
system is free of leaks.
2020 All rights reserved. REGENESIS and MonoShield are registered trademarks and MonoBase and Nitra-Core are trademarks of
Composite Thickness
Test Method MonoBase
30 milMFX internal Method
Weight
UV Stability
ASTM D751 - Procedure A
EN1849-2
MD – 236 lbs
13 oz./SY
CD – 247 lbs
Free Outdoor Exposure
Excellent
Color
Tensile Strength (Grab)
Tear Resistance ASTM D5884 MD – 26 lbs
Class F
MD – 81%
CD – 20%
EN13501-1
6 Months
105 (mL(STP)/m2.d.atm) Methane Permeability
Layer Thickness MFX internal Method 22 mil
ASTM D751 - Procedure A
CD – 30 lbs
ASTM D1434
Benzene Diffusion Coefficient
Chemical Resistance

TECHNICAL DATA
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
TCE Diffusion Coefficient
Packaging Weight: 143 lbsDimension: 9.84’ x 164’
2.89 x 10-17 m2/sec
2.1 x 10-18 m2/sec
60 mils (17 ft2/gal)
Nitra-Core™ Technical Data Sheet
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
TECHNICAL DATA
Nitra-Core, a patent-pending, nitrile-advanced asphalt latex, that is comprised of an elastic, water-based, co-polymer modified asphaltic nitrile latex, in addition to other proprietary compounds. Nitra-Core is used to install all Land Science barriers to improve constructibility and create a continuous seal between adjacent sheets and around penetrations. Nitra-Core has exceptional bonding to a wide variety of substrates including green concrete. Nitra-Core will build up to a specific thickness in a single application through multiple passes, allowing for easy installation around penetrations, uneven surfaces and oddly shaped areas.
Nitra-Core
2
Specific Gravity
Non-Toxic
pH
Color
Shelf Life
Test Method
ASTM D 244
ASTM D 2196
ASTM D 2939
Oakton
Nitra-Core
1.0
62 – 65%
10-13
Brown to Black
6 months
Packaging
Nitra-Core General Properties
Application to MonoBase
Brookfield Viscosity 75 – 90 centipoises
Residue Content
Demulsibility ASTM D 6936 35 – 40%
No Solvents
Drums
Totes
55 gal
275 gal
2020 All rights reserved. REGENESIS and MonoShield are registered trademarks and MonoBase and Nitra-Core are trademarks of REGENESIS Bioremediation Products Inc.
Mono Base is a patent pending 30-mil composite geomembrane comprised of flexible
tear resistant polyester reinforced grid structure. It designed to act as a stand-alone vapor
MonoBase™ Technical Data Sheet
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
TECHNICAL DATA
Composite Thickness
Test Method MonoBase
30 milMFX internal Method
Weight
UV Stability
ASTM D751 - Procedure A
EN1849-2
MD – 236 lbs
13 oz./SY
CD – 247 lbs
Free Outdoor Exposure
2.9x10-17 m2/sec
Color
Tensile Strength (Grab)
Tear Resistance ASTM D5884 MD – 26 lbs
Class F
Packaging
MD – 81%
CD – 20%
EN13501-1
6 Months
105 (mL(STP)/m2.d.atm)Methane Permeability
Weight: 143 lbs
Layer Thickness MFX internal Method 22 mil
ASTM D751 - Procedure A
CD – 30 lbs
ASTM D1434
Benzene Diffusion Coefficient 2.1x10-18 m2/sec
TCE Diffusion Coefficient
Dimension: 9.84’ x 164’
TECHNICAL DATA
www.landsciencetech.com
Corporate Headquarters1011 Calle Sombra, San Clemente Ca 92673 USATel: +1.949.366.8000
NitraCore
2/gal) at seams
Brookfield Viscosity
Non-Toxic
pH
Color
Shelf Life
Test Method
ASTM D-244
ASTM D2196
ASTM D2939
Oakton
NitraCore
1.0
62 – 65%
No Solvents
10-13
Brown to Black
6 months
Packaging
Drums
Totes
Value
55 gal
275 gal
Residue Content
Demulsibility ASTM D6936 35 – 40%
Nitra-
Nitra-Nitra-Nitra-
Nitra-Nitra-Nitra-Nitra-
Nitra-Nitra-Nitra-Nitra-
Nitra-Nitra-Nitra-
Nitra-
SAFETY DATA SHEET
1. Identification
Product identifier
Other means of identification
Recommended use
TerraCore, Nitra-Core or MonoCore
None.
Spray-applied asphalt for vapor barrier systems.
None known.Recommended restrictions
Manufacturer/Importer/Supplier/Distributor information
Land Science, a Division of RegenesisCompany Name
1011 Calle SombraAddress
San Clemente, CA 92673 USA
949-366-8000General information
[e-mail]-mail
For Hazardous Materials Incidents ONLY (spill, leak, fire, exposure or accident), call
CHEMTREC 24/7 at:
Emergency phone number
1-800-424-9300USA, Canada, Mexico
1-703-527-3887International
2. Hazard(s) identification
Not classified.Physical hazards
Category 1Sensitization, skinHealth hazards
Not classified.OSHA defined hazards
Label elements
Signal word Warning
Hazard statement May cause an allergic skin reaction.
Precautionary statement
Prevention Avoid breathing mist/vapors. Contaminated work clothing must not be allowed out of the
workplace. Wear protective gloves.
Response If on skin: Wash with plenty of water. If skin irritation or rash occurs: Get medical advice/attention.
Wash contaminated clothing before reuse.
Storage Store away from incompatible materials.
Disposal Dispose of contents/container in accordance with local/regional/national/international regulations.
Hazard(s) not otherwise
classified (HNOC)
None known.
Supplemental information None.
3. Composition/information on ingredients
Mixtures
8052-42-4 50 - 70Asphalt
CAS number %Chemical name
7732-18-5 30 - 40Water
-< 15Acrylonitrile-based polymer
-< 1Emulsifier
TerraCore, Nitra-Core or MonoCore SDS US
949353 Version #: 02 Revision date: - Issue date: 29-July-2019 1 / 7
Nitra-Core
Nitra-Core
1336-21-6 < 0.2Ammonium hydroxide
All concentrations are in percent by weight unless otherwise indicated.
Components not listed are either non-hazardous or are below reportable limits.
Chemical ingredient identity and/or concentration information withheld for some or all components
present is confidential business information (trade secret), and is being withheld as permitted by
29 CFR 1910.1200(i).
Composition comments
4. First-aid measures
Move to fresh air. Call a physician if symptoms develop or persist.Inhalation
Remove contaminated clothing immediately and wash skin with soap and water. In case of
eczema or other skin disorders: Seek medical attention and take along these instructions.
Skin contact
Rinse with water. Get medical attention if irritation develops and persists.Eye contact
Rinse mouth. Get medical attention if symptoms occur.Ingestion
May cause an allergic skin reaction. Dermatitis. Rash.Most important
symptoms/effects, acute and
delayed
Provide general supportive measures and treat symptomatically. Keep victim under observation.
Symptoms may be delayed.
Indication of immediate
medical attention and special
treatment needed
Ensure that medical personnel are aware of the material(s) involved, and take precautions to
protect themselves. Show this safety data sheet to the doctor in attendance. Wash contaminated
clothing before reuse.
General information
5. Fire-fighting measures
Foam. Dry powder. Carbon dioxide (CO2).Suitable extinguishing media
Do not use water jet as an extinguisher, as this will spread the fire.Unsuitable extinguishing
media
During fire, gases hazardous to health may be formed. Combustion products may include: carbon
oxides, nitrogen oxides.
Specific hazards arising from
the chemical
Self-contained breathing apparatus and full protective clothing must be worn in case of fire.Special protective equipment
and precautions for firefighters
Move containers from fire area if you can do so without risk.Fire fighting
equipment/instructions
Use standard firefighting procedures and consider the hazards of other involved materials.Specific methods
Material will burn in a fire.General fire hazards
6. Accidental release measures
Keep unnecessary personnel away. Keep people away from and upwind of spill/leak. Wear
appropriate protective equipment and clothing during clean-up. Avoid breathing mist/vapors. Do
not touch damaged containers or spilled material unless wearing appropriate protective clothing.
Ensure adequate ventilation. Local authorities should be advised if significant spillages cannot be
contained. For personal protection, see section 8 of the SDS.
Personal precautions,
protective equipment and
emergency procedures
Large Spills: Stop the flow of material, if this is without risk. Dike the spilled material, where this is
possible. Absorb in vermiculite, dry sand or earth and place into containers. Following product
recovery, flush area with water.
Small Spills: Wipe up with absorbent material (e.g. cloth, fleece). Clean surface thoroughly to
remove residual contamination.
Never return spills to original containers for re-use. For waste disposal, see section 13 of the SDS.
Methods and materials for
containment and cleaning up
Avoid discharge into drains, water courses or onto the ground.Environmental precautions
7. Handling and storage
Avoid breathing mist/vapors. Avoid contact with eyes, skin, and clothing. Avoid prolonged
exposure. Provide adequate ventilation. Wear appropriate personal protective equipment. Observe
good industrial hygiene practices.
Precautions for safe handling
Store in tightly closed container. Store away from incompatible materials (see Section 10 of the
SDS). Protect from freezing.
Conditions for safe storage,
including any incompatibilities
TerraCore, Nitra-Core or MonoCore SDS US
949353 Version #: 02 Revision date: - Issue date: 29-July-2019 2 / 7
Nitra-Core
8. Exposure controls/personal protection
Occupational exposure limits
US. OSHA Table Z-1 Limits for Air Contaminants (29 CFR 1910.1000)
ValueComponentsType
PEL 35 mg/m3Ammonium hydroxide (CAS
1336-21-6)
50 ppm
US. ACGIH Threshold Limit Values
FormValueComponentsType
STEL 35 ppmAmmonium hydroxide (CAS
1336-21-6)
TWA 25 ppm
TWA 0.5 mg/m3 Inhalable fume.Asphalt (CAS 8052-42-4)
US. NIOSH: Pocket Guide to Chemical Hazards
FormValueComponentsType
STEL 27 mg/m3Ammonium hydroxide (CAS
1336-21-6)
35 ppm
TWA 18 mg/m3
25 ppm
Ceiling 5 mg/m3 Fume.Asphalt (CAS 8052-42-4)
No biological exposure limits noted for the ingredient(s).Biological limit values
Good general ventilation should be used. Ventilation rates should be matched to conditions. If
applicable, use process enclosures, local exhaust ventilation, or other engineering controls to
maintain airborne levels below recommended exposure limits. If exposure limits have not been
established, maintain airborne levels to an acceptable level.
Appropriate engineering
controls
Individual protection measures, such as personal protective equipment
Wear approved chemical safety goggles. Risk of splashes: Face shield is recommended.Eye/face protection
Skin protection
Wear appropriate chemical resistant gloves. Suitable gloves can be recommended by the glove
supplier.
Hand protection
Skin protection
Wear appropriate chemical resistant clothing. Use of an impervious apron is recommended.Other
When workers are facing concentrations above the exposure limit they must use appropriate
certified respirators. Wear NIOSH approved respirator appropriate for airborne exposure at the
point of use. Appropriate respirator selection should be made by a qualified professional.
Respiratory protection
Wear appropriate thermal protective clothing, when necessary.Thermal hazards
Always observe good personal hygiene measures, such as washing after handling the material
and before eating, drinking, and/or smoking. Routinely wash work clothing and protective
equipment to remove contaminants. Contaminated work clothing should not be allowed out of the
workplace.
General hygiene
considerations
9. Physical and chemical properties
Appearance
Liquid.Physical state
Liquid.Form
Black or dark brown.Color
Not available.Odor
Odor threshold Not available.
pH 8 - 10
Melting point/freezing point 32 °F (0 °C)
TerraShield Core or MonoShield Core SDS US
949353 Version #: 02 Revision date: - Issue date: 29-July-2019 3 / 7
Nitra-Core
Initial boiling point and boiling
range
212 °F (100 °C)
Flash point Not available.
Evaporation rate Not available.
Not applicable.Flammability (solid, gas)
Upper/lower flammability or explosive limits
Flammability limit - lower
(%)
Not available.
Flammability limit - upper
(%)
Not available.
Vapor pressure Not available.
Vapor density Not available.
Relative density Not available.
Solubility(ies)
Solubility (water)Not available.
Partition coefficient
(n-octanol/water)
Not available.
Auto-ignition temperature Not available.
Decomposition temperature Not available.
Viscosity < 2000 cP (140 °F (60 °C))
Other information
Not explosive.Explosive properties
Not oxidizing.Oxidizing properties
10. Stability and reactivity
The product is stable and non-reactive under normal conditions of use, storage and transport.Reactivity
Material is stable under normal conditions.Chemical stability
No dangerous reaction known under conditions of normal use.Possibility of hazardous
reactions
Contact with incompatible materials. Excessive heat or cold.Conditions to avoid
Strong oxidizing agents.Incompatible materials
No hazardous decomposition products are known.Hazardous decomposition
products
11. Toxicological information
Information on likely routes of exposure
Inhalation Prolonged or repeated inhalation may cause respiratory tract irritation.
Skin contact May cause an allergic skin reaction.
Eye contact Direct contact with eyes may cause temporary irritation.
Ingestion May cause discomfort if swallowed.
Symptoms related to the
physical, chemical and
toxicological characteristics
May cause an allergic skin reaction. Dermatitis. Rash.
Information on toxicological effects
Acute toxicity Not expected to be acutely toxic.
Test ResultsComponentsSpecies
Ammonium hydroxide (CAS 1336-21-6)
Oral
Acute
LD50 Rat 350 mg/kg
Prolonged skin contact may cause temporary irritation.Skin corrosion/irritation
Direct contact with eyes may cause temporary irritation.Serious eye damage/eye
irritation
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949353 Version #: 02 Revision date: - Issue date: 29-July-2019 4 / 7
Nitra-Core
Respiratory or skin sensitization
Respiratory sensitization Not a respiratory sensitizer.
May cause an allergic skin reaction.Skin sensitization
No data available to indicate product or any components present at greater than 0.1% are
mutagenic or genotoxic.
Germ cell mutagenicity
Carcinogenicity Not classifiable as to carcinogenicity to humans.
IARC has listed Straight-Run Bitumens (including CAS 8052-42-4) as Group 2B during road
paving due to PAH release upon heating to a high temperature.
IARC Monographs. Overall Evaluation of Carcinogenicity
Asphalt (CAS 8052-42-4)2B Possibly carcinogenic to humans.
NTP Report on Carcinogens
Not listed.
OSHA Specifically Regulated Substances (29 CFR 1910.1001-1053)
Not listed.
This product is not expected to cause reproductive or developmental effects.Reproductive toxicity
Specific target organ toxicity -
single exposure
Not classified.
Specific target organ toxicity -
repeated exposure
Not classified.
Aspiration hazard Not an aspiration hazard.
12. Ecological information
The product is not classified as environmentally hazardous. However, this does not exclude the
possibility that large or frequent spills can have a harmful or damaging effect on the environment.
Ecotoxicity
Components Test ResultsSpecies
Ammonium hydroxide (CAS 1336-21-6)
Aquatic
EC50Algae 2700 mg/l, 18 daysChlorella vulgaris
Acute
LC50Crustacea 101 mg/l, 48 hours (NH3)Daphnia magna
LC50Fish 0.75 - 3.4, 96 hours (NH3)Fathead minnow (Pimephales promelas)
Chronic
LOAELCrustacea 1.3 mg/l, 21 days (NH3)Daphnia magna
NOECFish < 48 µg/l, 31 days (NH3)Ictalurus punctatus
No data is available on the degradability of this product.Persistence and degradability
No data available.Bioaccumulative potential
No data available.Mobility in soil
Other adverse effects None known.
13. Disposal considerations
Collect and reclaim or dispose in sealed containers at licensed waste disposal site. Incinerate the
material under controlled conditions in an approved incinerator. Dispose of contents/container in
accordance with local/regional/national/international regulations.
Disposal instructions
Dispose in accordance with all applicable regulations.Local disposal regulations
The waste code should be assigned in discussion between the user, the producer and the waste
disposal company.
Hazardous waste code
Dispose of in accordance with local regulations. Empty containers or liners may retain some
product residues. This material and its container must be disposed of in a safe manner (see:
Disposal instructions).
Waste from residues / unused
products
Since emptied containers may retain product residue, follow label warnings even after container is
emptied. Empty containers should be taken to an approved waste handling site for recycling or
disposal.
Contaminated packaging
14. Transport information
DOT
Not regulated as dangerous goods.
TerraCore, Nitra-Core or MonoCore SDS US
949353 Version #: 02 Revision date: - Issue date: 29-July-2019 5 / 7
Nitra-Core
IATA
Not regulated as dangerous goods.
IMDG
Not regulated as dangerous goods.
Not established.Transport in bulk according to
Annex II of MARPOL 73/78 and
the IBC Code
15. Regulatory information
This product is a "Hazardous Chemical" as defined by the OSHA Hazard Communication
Standard, 29 CFR 1910.1200.
US federal regulations
TSCA Section 12(b) Export Notification (40 CFR 707, Subpt. D)
Not regulated.
CERCLA Hazardous Substance List (40 CFR 302.4)
Ammonium hydroxide (CAS 1336-21-6)Listed.
Asphalt (CAS 8052-42-4)Listed.
SARA 304 Emergency release notification
Not regulated.
OSHA Specifically Regulated Substances (29 CFR 1910.1001-1053)
Not listed.
Toxic Substances Control Act (TSCA)All components of the mixture on the TSCA 8(b) inventory are designated
“active”.
SARA 302 Extremely hazardous substance
Superfund Amendments and Reauthorization Act of 1986 (SARA)
Not listed.
YesSARA 311/312 Hazardous
chemical
Respiratory or skin sensitizationClassified hazard
categories
SARA 313 (TRI reporting)
Not regulated.
Other federal regulations
Clean Air Act (CAA) Section 112 Hazardous Air Pollutants (HAPs) List
Not regulated.
Clean Air Act (CAA) Section 112(r) Accidental Release Prevention (40 CFR 68.130)
Not regulated.
Not regulated.Safe Drinking Water Act
(SDWA)
US state regulations
US. Massachusetts RTK - Substance List
Ammonium hydroxide (CAS 1336-21-6)
Asphalt (CAS 8052-42-4)
US. New Jersey Worker and Community Right-to-Know Act
Ammonium hydroxide (CAS 1336-21-6)
Asphalt (CAS 8052-42-4)
US. Pennsylvania Worker and Community Right-to-Know Law
Ammonium hydroxide (CAS 1336-21-6)
Asphalt (CAS 8052-42-4)
US. Rhode Island RTK
Asphalt (CAS 8052-42-4)
California Proposition 65
This product can expose you to Asphalt, which is known to the State of California to cause cancer.
For more information go to www.P65Warnings.ca.gov.
WARNING:
TerraCore, Nitra-Core or MonoCore SDS US
949353 Version #: 01 Revision date: - Issue date: 29-July-2019 6 / 7
Nitra-Core
California Proposition 65 - CRT: Listed date/Carcinogenic substance
Asphalt (CAS 8052-42-4)Listed: January 1, 1990
US. California. Candidate Chemicals List. Safer Consumer Products Regulations (Cal. Code Regs, tit. 22, 69502.3,
subd. (a))
Asphalt (CAS 8052-42-4)
International Inventories
Country(s) or region Inventory name On inventory (yes/no)*
Australian Inventory of Chemical Substances (AICS)YesAustralia
Domestic Substances List (DSL)YesCanada
Non-Domestic Substances List (NDSL)NoCanada
Inventory of Existing Chemical Substances in China (IECSC)YesChina
European Inventory of Existing Commercial Chemical
Substances (EINECS)
NoEurope
European List of Notified Chemical Substances (ELINCS)NoEurope
Inventory of Existing and New Chemical Substances (ENCS)YesJapan
Existing Chemicals List (ECL)YesKorea
New Zealand Inventory YesNew Zealand
Philippine Inventory of Chemicals and Chemical Substances
(PICCS)
YesPhilippines
Taiwan Chemical Substance Inventory (TCSI)YesTaiwan
*A "Yes" indicates this product complies with the inventory requirements administered by the governing country(s).
A "No" indicates that one or more components of the product are not listed or exempt from listing on the inventory administered by the governing
country(s).
Toxic Substances Control Act (TSCA) Inventory YesUnited States & Puerto Rico
16. Other information, including date of preparation or last revision
21-May-2019Issue date
-Revision date
Version #01
Health: 2
Flammability: 1
Physical hazard: 0
HMIS® ratings
NFPA ratings
02
1
Land Science, a Division of REGENESIS cannot anticipate all conditions under which this
information and its product, or the products of other manufacturers in combination with its product,
may be used. It is the user’s responsibility to ensure safe conditions for handling, storage and
disposal of the product, and to assume liability for loss, injury, damage or expense due to improper
use. The information in the sheet was written based on the best knowledge and experience
currently available.
Disclaimer
TerraCore, Nitra-Core or MonoCore SDS US
949353 Version #: 02 Revision date: - Issue date: 29-July-2019 7 / 7
Nitra-Core
[phone]
2020 All rights reserved. REGENESIS and MonoShield are registered trademarks and MonoBase and Nitra-Core are trademarks
RP Series
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
• Energy efficient
• Ultra-quiet operation
• Meets all electrical code requirements
• Water-hardened motorized impeller
• Seams sealed to inhibit radon leakage
(RP140 & RP145 double snap sealed)
• RP140 and RP260 Energy Star® Rated
• ETL Listed - for indoor or outdoor use
• Thermally protected motor
• Rated for commercial and residential use
For Further Information Contact
Made in USA with US
and imported parts
All RadonAway inline radon fans are covered by our
5-year, hassle-free warranty
ETL Listed
9/12P/N 02008
MODEL P/N FAN DUCT
DIAMETER WATTS MAX.
PRESSURE“WC
TYPICAL CFM vs. STATIC PRESSURE WC
0”.5”1.0”1.5”2.0”
RP140*23029-1 4”15-21 0.8 135 70 ---
RP145 23030-1 4”41-72 2.1 166 126 82 41 3
RP260*23032-1 6”50-75 1.6 272 176 89 13 -
RP265 23033-1 6”91-129 2.3 334 247 176 116 52
RP380*28208 8”95-152 2.3 497 353 220 130 38
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”
*Energy Star® Rated
The World’s Leading
Radon Fan Manufaturer
RP Series
Installation Instructions
RadonAway
3 Saber Way Ward Hill, MA 01835
www.radonaway.com
3 Saber Way Ward Hill, MA 01835
P/N IN020-REV K 4/11
IN020 Rev K Page 2 of 8

RadonAway Ward Hill, MA.
Series Fan Installation Instructions
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! Do not use fan in hazardous environments where fan electrical system could provide ignition to
combustible or flammable materials.
2. WARNING! Do not use fan to pump explosive or corrosive gases.
3. WARNING! Check voltage at the fan to insure it corresponds with nameplate.
4. 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.
5. NOTICE! There are no user serviceable parts located inside the fan unit.
Do NOT attempt to open. Return unit to the factory for service.
6. All wiring must be performed in accordance with the National Fire Protection Association’s (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
7. 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.
8. 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.

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.

IN020 Rev K Page 3 of 8

INSTALLATION INSTRUCTIONS IN020 Rev K
RP Series
RP140 p/n 23029-1
RP145 p/n 23030-1
RP260 p/n 23032-1
RP265 p/n 23033-1
RP380 p/n 28208 1.0 SYSTEM DESIGN CONSIDERATIONS 1.1 INTRODUCTION The RP Series Radon Fans are intended for use by trained, professional Radon mitigators. The purpose of this instruction is to provide additional guidance for the most effective use of an RP Series Fan. This instruction should be considered as a supplement to EPA standard practices, state and local building codes and state regulations. In the event of a conflict, those codes, practices and regulations take precedence over this instruction. 1.2 ENVIRONMENTALS The RP 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. 1.3 ACOUSTICS The RP Series Fan, when installed properly, operates 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 ENERGY STAR qualified in-line 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). 1.4 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 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 and falls upon shutoff. Should this condition arise, it is recommended that the fan be turned off until the water recedes allowing for return to normal operation. 1.5 SLAB COVERAGE The RP Series Fan 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 Series Fan best suited for the sub-slab material can improve the slab coverage. The RP140/145/155 are best suited for general purpose use. The RP260 can be used where additional airflow is required and the RP265/380 is 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.
IN020 Rev K Page 4 of 8

1.6 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 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 Series Fans are NOT suitable for underground burial. For RP Series Fan piping, the following table provides the minimum recommended pipe diameter and pitch under several system conditions.
Pipe
Dia. Minimum Rise per Ft of Run*
@25 CFM @50 CFM @100 CFM @200 CFM @300 CFM
6" - 3/16 1/4 3/8 3/4
4" 1/8 1/4 3/8 2 3/8 -
3" 1/4 3/8 1 1/2 - -
*Typical RP1xx/2xx Series Fan operational flow rate is 25 - 90 CFM 0n 3” and 4” pipe.
(For more precision, determine flow rate by measuring Static Pressure, in WC, and
correlate pressure to flow in the performance chart in the addendum.)
Under some circumstances in an outdoor installation a condensate bypass should be installed in the outlet ducting as shown. This may be particularly true in cold climate installations which require long lengths of outlet ducting or where the outlet ducting is likely to produce large amounts of condensation because of high soil moisture or outlet duct material. Schedule 20 piping and other thin-walled plastic ducting and Aluminum downspout will normally produce much more condensation than Schedule 40 piping. The bypass is constructed with a 45 degree Wye fitting at the bottom of the outlet stack. The bottom of the Wye is capped and fitted with a tube that connects to the inlet piping or other drain. The condensation produced in the outlet stack is collected in the Wye fitting and drained through the bypass tube. The bypass tubing may be insulated to prevent freezing. 1.7 "SYSTEM ON" INDICATOR A properly designed system should incorporate a "System On" Indicator for affirmation of system operation. A manometer, such as a U-Tube, or a vacuum alarm is recommended for this purpose.
RUN
RISE

IN020 Rev K Page 5 of 8
1.8 ELECTRICAL WIRING The RP Series Fans operate on standard 120V 60 Hz. AC. All wiring must be performed in accordance with the National Fire Protection Association’s (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 U.L. 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. 1.9 SPEED CONTROLS The RP Series Fans are rated for use with electronic speed controls, however, they are generally not recommended. If used, the recommended speed control is Pass & Seymour Solid State Speed Control Cat. No. 94601-I. 2.0 INSTALLATION The RP Series Fan can be mounted indoors or outdoors. (It is suggested that EPA recommendations be followed in choosing the fan location.) The RP Series Fan may be mounted directly on the system piping or fastened to a supporting structure by means of optional mounting bracket.

IN020 Rev K Page 6 of 8
2.1 MOUNTING Mount the RP 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 Series Fan may be optionally secured with the RadonAway P/N 25007-2 (25033 for RP385) 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 means of disconnect for servicing the unit and vibration isolation. 2.4 ELECTRICAL CONNECTION Connect wiring with wire nuts provided, observing proper connections (See Section 1.8):
Fan Wire Connection
Green Ground
Black AC Hot
White AC Common
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. 2.6 OPERATION CHECKS _____ Verify all connections are tight and leak-free. _____ Insure the RP Series Fan and all ducting is secure and vibration-free. _____ Verify system vacuum pressure with manometer. Insure vacuum pressure is less than 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.

Typical Indoor Installation
IN020 Rev K Page 7 of 8
RP SERIES PRODUCT SPECIFICATIONS The following chart shows fan performance for the RP Series Fan:
Typical CFM Vs Static Pressure "WC
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 272 220 176 138 103 57 13 - -
RP265 334 291 247 210 176 142 116 87 52
RP380* 497 401 353 281 220 176 130 80 38
* Tested with 6” inlet and discharge pipe.
Power Consumption
120 VAC, 60Hz 1.5 Amp Maximum
Maximum Recommended
Operating Pressure* (Sea Level Operation)**
RP140 17 - 21 watts RP140 0.8" W.C.
RP145 41 - 72 watts RP145 1.7" W.C.
RP260 52 - 72 watts RP260 1.5" W.C.
RP265 91 - 129 watts RP265 2.2" W.C.
RP380 95 - 152 watts RP380 2.0" W.C.
*Reduce by 10% for High Temperature Operation
**Reduce by 4% per 1000 feet of altitude
Size Weight Inlet/Outlet
RP140 8.5H" x 9.7" Dia. 5.5 lbs. 4.5" OD (4.0" PVC Sched 40 size compatible)
RP145 8.5H" x 9.7" Dia. 5.5 lbs. 4.5" OD (4.0" PVC Sched 40 size compatible)
RP260 8.6H" x 11.75" Dia. 5.5 lbs. 6.0” OD
RP265 8.6H" x 11.75" Dia. 6.5 lbs. 6.0” OD
RP380 10.53H" x 13.41" Dia. 11.5 lbs. 8.0” OD

Recommended ducting: 3" or 4" RP1xx/2xx, 6” RP380, Schedule 20/40 PVC Pipe
Mounting: Mount on the duct pipe or with optional mounting bracket.
Storage temperature range: 32 - 100 degrees F.
Normal operating temperature range: -20 - 120 degrees F.
Maximum inlet air temperature: 80 degrees F.
Continuous Duty
Class B Insulation
Thermally Protected
3000 RPM
Rated for Indoor or Outdoor Use

RP140 and RP260
Only.

IN020 Rev K Page 8 of 8
IMPORTANT INSTRUCTIONS TO INSTALLER

Inspect the GP/XP/XR/RP 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. Return unit to factory
for service.

Install the GP/XP/XR/RP Series Fan in accordance with all EPA standard practices, and state and local building codes and state regulations.
WARRANTY
Subject to any applicable consumer protection legislation, RadonAway warrants that the GPX01/XP/XR/RP Series Fan (the “Fan”) will be free from
defects in materials and workmanship for a period of 90 days from the date of purchase (the “Warranty Term”).
RadonAway will replace any Fan which fails due to defects in materials or workmanship. 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.
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.
5 YEAR EXTENDED WARRANTY WITH PROFESSIONAL INSTALLATION.
RadonAway will extend the Warranty Term of the fan to 5 years from date of manufacture if the Fan is installed in a professionally designed and
professionally installed radon system or installed as a replacement fan in a professionally designed and professionally installed radon system.
Proof of purchase and/or proof of professional installation may be required for service under this warranty. Outside the Continental United States
and Canada the extended Warranty Term is limited to one (1) year from the date of manufacture.
RadonAway is not responsible for installation, removal or delivery costs associated with this Warranty.
EXCEPT AS STATED ABOVE, THE GPx01/XP/XR/RP SERIES FANS ARE PROVIDED WITHOUTWARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION,IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 THEPERFORMANCE THEREOF. RADONAWAY’S AGGREGATE LIABILITY HEREUNDER SHALL NOT INANY EVENT EXCEED THE AMOUNT OF THE PURCHASE PRICE OF SAID PRODUCT. THE SOLE ANDEXCLUSIVE REMEDY UNDER THIS WARRANTY SHALL BE THE REPAIR OR REPLACEMENT OF THEPRODUCT, TO THE EXTENT THE SAME DOES NOT MEET WITH RADONAWAY’S WARRANTY ASPROVIDED 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
cost to and from factory.
RadonAway
3 Saber Way
Ward Hill, MA 01835
TEL. [phone]
FAX [phone]
Record the following information for your records:
Serial No.
Purchase Date