12018_Hondros Property_Vapor Mitigation Design-Approval 20180307

State of North Carolina | Environmental Quality | Waste Management
1646 Mail Service Center | 217 West Jones Street | Raleigh, NC 27699-1646
919 707 8200 T

March 7, 2018

Sent Via E-mail

Matthew McDuffie, P.G.
ECS Southeast LLP
1812 Center Park Drive, Suite D Charlotte, NC 28217
[e-mail]

Subject: Vapor Mitigation System Design Approval
Hondros Brownfields Property Granite Point
Charlotte, Mecklenburg County
Brownfields Project No. 12018-08-060

Dear Mr. McDuffie, The Department of Environmental Quality (DEQ) Brownfields Program received the Vapor
Mitigation System dated March 6, 2018 (Work Plan) for the above referenced Brownfields
Property. DEQ Brownfields reviewed this document, and determined that comments made by
DEQ Brownfields on January 25, 2018 to previous versions of this work plan have been incorporated as requested. Therefore, DEQ Brownfields approves the Work Plan.
Please be advised that this approval from DEQ Brownfields does not waive any applicable
requirement to obtain any necessary permits, licenses or certifications which may be required from
other state or local entities. If you have questions about this correspondence or require additional information, please feel free to contact me by phone at 704/661-0330 or by email at [e-mail].

Sincerely,

Carolyn Minnich
Carolyn Minnich
Brownfields Project Manager

VAPOR MITIGATION SYSTEM

HONDROS BROWNFIELDS PROPERTY
9101 & 9111 NATIONS FORD ROAD
CHARLOTTE, MECKLENBURG COUNTY, NORTH CAROLINA
BROWNFIELDS PROJECT NUMBER 12018-08-60

ECS SOUTHEAST, LLP
PROJECT 49: 5825

PREPARED FOR:
Signature Construction, LLC
March 6, 2018
Vapor Mitigation Design
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number 12018-08-60
ECS Project No. 49-5825
March 6, 2018

TABLE OF CONTENTS

1.0 PROJECT INFORMATION ................................................................................................. 1
2.0 VAPOR MITIGATION SYSTEM .......................................................................................... 1
3.0 PERFORMANCE MONITORING ........................................................................................ 3

APPENDIX

Appendix A Brownfields Agreement (Brownfields Project # 12018-08-60)
Appendix B Vapor Mitigation Design Sheets
Appendix C Technical Data Sheets
Appendix D Manufacturer’s Specifications

Vapor Mitigation Design
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number 12018-08-60
ECS Project No. 49-5825
March 6, 2018

1
1.0 PROJECT INFORMATION

The Hondros Property site located at 9101 & 9111 Nations Ford Road, Mecklenburg County,
North Carolina consists of an approximate 16.39 acre tract of land. Previous investigations by
ECS, LLP Carolinas and others identified the presence tetrachloroethene (PCE) and other
volatile organic compounds (VOCs) in onsite soil vapor and groundwater. Based on these
findings, the subject property was accepted into the North Carolina Department of
Environmental Quality (NCDEQ) Brownfields Program, and a Brownfields Agreement
(Brownfields Project Number 12018-08-60) was executed between NCDEQ and Arrowood
Nations Ford Property, LLC in February 2010 (Appendix A)

The planned redevelopment of the subject property includes construction of a multi-family
residential development. Based on the results of the 2007 groundwater assessments that
identified the presence of VOCs above the standards set forth in Title 15A of the North Carolina
Administrative Code, Subchapter 2L, Rule .0202. and the results of the 2009 soil vapor
sampling that identified the presence of VOCs above the standards derived using the
Guidelines of Inactive Hazardous Sites Branch of DENR’s Superfund Section, a properly
designed and installed vapor mitigation system appears to be necessary for the planned multi-
family residential development.

2.0 VAPOR MITIGATION SYSTEM

Based on the structural design of Type A-buildings, Type-B buildings, and a clubhouse, a Vapor
Mitigation Plan (VMP) has been developed for the site. The VMP is discussed in detail below
and the Vapor Mitigation Design is provided as Appendix B.

2.1 Vapor Mitigation Design

The Vapor Mitigation Design includes a combination of a vapor barrier using Liquid Boot and a
passive sub-slab venting system embedded in a gas permeable aggregate layer. Based on the
building design details, the building will be slab on grade construction. As such, it is anticipated
that a vapor barrier will be installed above the minimum 6-inch gas permeable aggregate layer
immediately below the slab. In addition, a passive sub-slab venting system will be installed that
will be comprised of a GeoVent low-profile venting system, and PVC vent riser piping
terminating with a 6” wind-driven turbine ventilator.

Vapor Barrier

A vapor barrier system consisting of 40-mil (dry thickness) spray applied polymer modified
asphaltic emulsion (Liquid Boot 500 or similar) applied to a 20-mil VI-20 geomembrane with a
non-woven geotextile protection layer (i.e. UltraShield G-1000) is recommended. The Liquid
Boot spray applied membrane provides a 40-mil layer of protection, is water-based and non-
toxic, provides a monolithic membrane free of seams, and can be easily applied to complex
shapes and penetrations.

The vapor barrier consists of a three part system; 1) a dual purpose base layer comprised of VI-
20-mil geomembrane which is placed directly on the gas permeable aggregate sub-base,
provides a uniform substrate for the Liquid Boot vapor barrier to be spray applied and also
Vapor Mitigation Design
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number 12018-08-60
ECS Project No. 49-5825
March 6, 2018

2
serves as a gas vapor barrier, 2) a 40-mil (dry thickness) spray applied polymer (Liquid Boot
500) installed to serve as the gas barrier, and 3) a top layer (UltraShield G-1000) which is
installed directly over the Liquid Boot and serves as a protection course for the vapor barrier
system. The vapor barrier will be sealed at the seams, footings and penetrations with the Liquid
Boot 500 spray applied membrane. It is recommended that the vapor barrier be installed in
accordance with the manufacturer’s specifications (Appendix C). Following the installation of
the vapor barrier, a smoke test, using non-toxic smoke underneath the vapor barrier, will be
conducted to confirm a vapor-tight installation and show areas that may need to be repaired.
Thickness tests will also be conducted in conjunction with the smoke test. It is anticipated that
thickness testing will include physically cutting a small perforation through the vapor barrier at
multiple locations and measuring the thickness to ensure it has been correctly applied across
the targeted area. Inspections of the vapor barrier will be conducted by a qualified project
professional, under the supervision of the design P.E., after the gravel/piping has been installed
and before pouring the concrete slab. Under no circumstances will any portion of the system be
covered without inspection, and NCDEQ will be provided 48-hour notice prior to scheduling
inspection activities. Inspections will include a field log detailing observations of the barrier
installation and sealing at the seams, footings, and penetrations, observations from the smoke
testing and documentation of repairs, as needed, and a photographic log. The inspections
records will be submitted to the NCDEQ as part of a VMP report.

Passive Sub-Slab Venting System

The passive sub-slab venting system recommended for use includes a system of GeoVent to be
constructed within the gas permeable aggregate beneath the building slab prior to the
installation of the vapor barrier (Design Sheet ENV110, ENV120, and ENV130). Based on the
design specifications, a minimum of 6-inches of a gas permeable aggregate layer (No. 57 stone
or equivalent) is recommended as the sub-base beneath the building slab into which the
GeoVent would be embedded. The purpose of the GeoVent is to allow volatile organic vapors
emanating from the groundwater plume to be ventilated through the PVC roof vents (Design
Sheet ENV201). The recommended construction of the vent pipes is 4-inch schedule 40 PVC
terminating with a 6” wind-driven turbine ventilator (or approved alternate) installed on the
discharge end of the exhaust stacks on the roof. After their construction, penetrations of the roof
would be sealed to the manufacturer’s specifications.

The sub-slab venting system will also include the installation of sub-slab pressure monitoring
points. Based on the design, up to 6 monitoring points are recommended for Type A-or Type-B
buildings (i.e., one per unit), and up to 3 monitoring points are recommended for the clubhouse
for the purpose of measuring the differential pressure between the indoor air and sub-slab floor
and evaluate the effectiveness of the mitigation system. Presser monitoring points with include,
but are not limited to, areas near the horizontal piping as well as the remote extents of the
system. Details of the monitoring point construction are provided on Design Sheet ENV201. In
addition, air-tight gas sampling ports are designed for installation at the base of each of the vent
riser that ventilate the sub-slab vapors to the roof. These vapor monitoring points will be
installed for the collection of vapor samples for laboratory analysis, if needed.

It is anticipated that differential pressure measurements will be collected from each measuring
point after the installation of the vapor barrier and upon completion of the building construction
as well as monthly for the first year. Based on results of the pressure monitoring, these vents
Vapor Mitigation Design
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number 12018-08-60
ECS Project No. 49-5825
March 6, 2018

3
may be transitioned to quarterly after the first year of operation. The measurements will be
collected using a handheld manometer capable of collecting measurements to the nearest
0.001 inches of water. Additional measurements will be collected during different times of the
day to evaluate potential diurnal effects caused by HVAC system operation. The goal of the
vapor mitigation system is to create a minimum of 0.016 inches of water pressure differential
across the slab. If differential pressure measurements as outlined above indicate that sub-slab
venting is creating less than the target differential pressure across the slab (0.016 inches of
water), a plan to deploy data loggers to continuously monitor differential pressure between
indoor air and sub-slab will be submitted to DEQ for review and approval and/or modifying the
passive sub-slab venting system into an active sub-slab venting system.

3.0 PILOT TEST AND PERFORMANCE MONITORING

3.1 Pilot Testing

A pilot test will be performed of the system once the vapor barrier and passive sub-slab venting
system have been installed and the concrete slab has been poured In order to demonstrate that
all areas below the slab can be effectively influenced by the piping network. Permanent
pressure monitoring points will be installed throughout the piping network. The location of
pressure monitoring points will include, but are not limited to, the remote extents of the system,
in areas near the horizontal piping, as well as areas of potential reduced effectiveness based on
plumbing piping, as well as other utilities and/or wall layouts. Based on the results of the pilot
test, and with NCDEQ approval, the final number of monitoring points may be reduced. The pilot
test will consist of using a rated blower and applying a vacuum to the vertical risers and
measuring the pressure differential within the permanent vapor monitoring points installed within
the interior as well as the remote extents of the system. The pilot testing activities and findings
will be documented and modifications will be made if the testing indicates additional monitoring
points or suction points are needed to achieve influence across the targeted area.

3.2 Performance Monitoring

Following the completion of the pilot testing and prior to occupancy of the building, one indoor
air sample will be collected from a representative area of each Type-A or Type-B building unit
and up to 2 indoor air samples will be collected from representative areas of the club house.
Concurrently with the indoor air sampling, an exterior background ambient air sample will be
collected. The samples will be collected after the building envelop is complete but before
finishing with paint, use of adhesives, tile placement, etc., which could be indoor sources of the
compounds of potential concern in indoor air. In the event the HVAC system is not operational
during the time of the air sampling, diligent oversight of construction crews and materials will be
conducted in order to reduce cross-contamination by indoor air sources. Assessment activities
will be conducted in accordance with the NCDWM Vapor Intrusion Guidance.

Concurrently with the first indoor air sampling event conducted following the completion of
building construction (as noted above), sub-slab vapor sampling will be conducted whereby sub-
slab soil gas samples will be collected from monitoring points. It is anticipated that these
performance monitoring points will be sampled on an annual basis for up to three years to
determine if increasing concentration trends are present that may result in transitioning the
system to active. At the completion of the third annual sampling event, a request to terminate
Vapor Mitigation Design
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number 12018-08-60
ECS Project No. 49-5825
March 6, 2018

4
the future annual sampling may be submitted to the NCDEQ should the data support this
recommendation.

The indoor air and sub-slab vapor samples will be submitted to a certified laboratory for analysis
for volatile organic compounds (VOCs) using EPA Method TO-15. ECS will communicate the
regulatory reporting limits to the laboratory prior to analysis to ensure their reporting limits are
consistent with the comparison criteria. In addition, ECS will request the laboratory report the
“J” flagged detections, if present. The indoor air samples will be collected over a 24-hour period
of time using a certified-clean 6-liter summa canister and flow regulator.

Prior to collecting the soil vapor samples, laboratory grade helium gas will be used as a quality
assurance/control measure to confirm the integrity of the probe seal. A plastic cylinder
(approximately 1.75 quarts) will be placed and sealed over the sampling point and purged with
laboratory grade helium. The probe point tubing and tracer gas tubing will be placed through
the cylinder wall via rubber grommets. The cylinder will be placed on a 4-inch rubber gasket
and held securely to the slab with a heavy weight. During the purging stage, the cylinder will be
flooded with laboratory grade helium via the hose placed through the cylinder wall. A Model
MGD-2002 Multi-Gas Leak detector or similar will be connected to the probe tube and the air
stream being purged will be measured for helium. A helium concentration of less than five
percent helium will be considered acceptable. If concentrations greater than five percent helium
are measured, the probe tube seal will be reseated and the leak detection process will be
repeated.

During the sampling process, canister vacuum will be maintained above 0” Hg, and canister
vacuums will be recorded by field personnel during sample collection as well as by the
laboratory prior to analysis.

The analytical data will be provided to DEQ within 48 hours of receipt and validation of the data.
A report of the indoor air sampling will be submitted to DEQ within 21 days of completion of the
sampling. Based upon the results of the sampling, ECS will make recommendations in
accordance with the DWM Vapor Intrusion Guidance. It is anticipated that the recommendations
will consist of one of the following:

Additional indoor air sampling is warranted to confirm that the VMP is effective for residential
use (per the DWM VI Guidance, in the case where calculated cumulative risks are within the
range of 1x10-4 and 1x10-6 for potential carcinogenic risks and below a hazard index of 1 for
potential non-carcinogenic risks).

Active fans to replace goosenecks will be installed as part of the VMP and follow-up sampling
will be performed after installation of the fans (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). In this case, mitigation system
modifications and plans for additional indoor air sampling and long-term differential pressure
monitoring across the slab will be submitted to the Brownfields Program for approval prior to
implementation.

Following confirmation that the mitigation system is installed, effective, and operating properly, a
North Carolina Professional Engineer (PE)-certified report documenting installation of the
Vapor Mitigation Design
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number 12018-08-60
ECS Project No. 49-5825
March 6, 2018

5
mitigation system will be submitted to the (DEQ) Brownfields Program. Note that inspections of
the mitigation system will be performed during all phases of construction by or under
supervision of the engineer certifying the report. NCDEQ will be notified a minimum of 48 hours’
notice prior to each inspection. Inspection documentation for all portions of the mitigation
system installation in each area, including field logs and photographic documentation, will be
included as an appendix to the installation report. The installation report will be submitted to the
Brownfields Program for review and approval in order to obtain conditional occupancy
determination in accordance with the standard vapor intrusion provisions of the Brownfield
Agreement.

In order to ensure the long-term performance and continued effectiveness of the mitigation
system, a monitoring and maintenance plan will be submitted for NCDEQ review and approval.
The monitoring and maintenance plan will include pressure testing conducted in accordance
with the DWM Vapor Intrusion Guidance and Brownfields Agreement using DEQ approved
pressure monitoring points installed within the piping network. It is anticipated that the location
of pressure monitoring points will include, but are not limited to, the remote extents of the
system, in areas near the horizontal piping, as well as areas of potential reduced effectiveness
based on plumbing piping, as well as other utilities and/or wall layouts. Pressure testing will be
conducted on a monthly basis over the first year of occupancy and the results submitted to the
Brownfield Project manager on a quarterly basis. With approval of the Brownfields Program, the
frequency of pressure monitoring may be reduced to quarterly monitoring and the results
submitted annually in conjunction with the Land Use Restriction Update (LURU). Based on the
results of the first year of performance testing, continued annual monitoring may be appropriate.

As part of the maintenance and monitoring program, an inspection will be conducted
semiannually to determine if any new or existing areas need to be sealed, caulked, and/or
covered, etc. In addition, remodeling activities, damage to the system, or if the results of
pressure monitoring indicate reduced effectiveness or malfunction of the system, the
brownfields project manager will be notified, the system will diagnosed and repaired, and
monitoring frequency will be modified accordingly.

If required, long-term performance monitoring will include the collection of soil gas and/or indoor
air sampling. The frequency of sample collection, laboratory analysis, and reporting will be
conducted in accordance with the requirements of the Brownfield Project Manager.

APPENDIX A

APPENDIX B

APPENDIX C

TECHNICAL DATATECHNICAL DATA
FORM: TDS_GEOVENT_AM_EN_201705_V2
North America: 847.851.1800 | 800.527.9948 | www.cetco.com
© 2017 Minerals Technologies Inc. IMPORTANT: The information contained herein supersedes all previous printed versions, and is believed to be accurate and reliable. For the most up-to-date information, please visit www.cetco.com. CETCO accepts no responsibility for the results obtained through application of this
product. All products are sold on the understanding that the user is solely responsible for determining their suitability for the intended use and for proper use and
disposal of the product. CETCO MAKES NO WARRANTY OF MERCHANTABILITY OR SUITABILITY FOR ANY PARTICULAR PURPOSE IN CONNECTION WITH ANY SALE
OF THE PRODUCTS DESCRIBED HEREIN. CETCO reserves the right to update information without notice.
DESCRIPTION
GEOVENT™ consists of a three-dimensional
vent core that is wrapped in a non-woven,
needle-punched filter fabric.
GEOVENT™ End Outlets are available for use
in conjunction with GEOVENT™ active/pas-
sive gas venting systems.
APPLICATIONGEOVENT™ is designed for use in the fol-lowing application:
• An active or passive venting when used
with CETCO vapor intrusion mitigation sys-
tems.
BENEFITS
• Installed directly on subgrade eliminating
trenching and potential interference or
damage to existing underground utilities
• Placed in closer proximity to the vapor in-
trusion barrier allowing for more effective
venting of any accumulated gas
• Greater opening area per lineal foot of pipe
and integral filter fabric allows for higher
ventilation efficiency
PACKAGINGGEOVENT™ is available in the following packaging option:
• 1 ft. x 165 ft. (0.3 m x 50 m) Rolls
GEOVENT™ allows for ease of installation directly on the subgrade, eliminating the need for costly and labor-intensive trenching.
GEOVENT™ allows for ease of installation
directly on the subgrade, eliminating the need
for costly and labor-intensive trenching.
UPDATED: MAY 2017
TESTING DATA
GEOVENT™
ACTIVE/PASSIVE GAS VENTING SYSTEM
PHYSICAL PROPERTIES
CORE PROPERTY TEST METHOD RESULTS
Compressive Strength ASTM D 1621 8,500 – 11,000 psf (407 – 527 kN/m²)
Thickness ASTM D 1777 1.0 in. (2.54 cm)
Flow Rate (Hydraulic gradient = .1)ASTM D 4716 30 gpm/ft width (372 lpm/m)
FABRIC PROPERTY TEST METHOD RESULTS
A.O.S.ASTM D 4751 70 US Sieve (0.212 mm)
Grab Tensile Strength ASTM D 4632 100 lbs. (0.45 kN)
CBR Puncture Strength ASTM D 6241 250 lbs. (1.11 kN)
Flow Rate ASTM D 4491 140 gpm/ft² (5,704 lpm/m²)
TECHNICAL DATA
North America: 847.851.1800 | 800.527.9948 | www.cetco.com
DESCRIPTION
VI-20™ is a 7-layer co-extruded geomembrane
made using high quality virgin-grade polyethyl-
ene and EVOH resins that provide unmatched
impact strength as well as superior resistance
to VOC vapor transmission. EVOH technol-
ogy serves as a highly resilient underslab
and vertical wall barrier designed to restrict
methane, radon and other harmful chemi-
cals. Applications for EVOH originated in the
manufacturing of automotive fuel systems to
control emissions of hydrocarbons, whose use
was mandated by the US EPA and the CA Air
Resources Board (CARB) to reduce VOC emis-
sions.
APPLICATION
VI-20™ is a 20-mil, high performance poly-
ethylene-EVOH copolymer geomembrane,
specially designed for use as a VOC barrier
when used in conjunction with Liquid Boot®
spray-applied vapor intrusion membrane to
minimize vapor intrusion and nuisance water
(non-hydrostatic conditions) migration into
buildings. VI-20™ is ideal for applications with
chlorinated solvents, BTEX and other PAHs.
BENEFITS
• Polyethylene layers provide excellent chemi-
cal resistance and physical properties
• EVOH barrier technology provides superior
protection against diffusion of chemicals
when compared to typical HDPE geomem-
branes
• Manufactured at ISO 9001:2008 certified
plant
INSTALLATION
For use as a component of the Liquid Boot®
Plus system, VI-20™ geomembrane is rolled
out on prepared sub-grade, overlapping
seams a minimum of six inches (6”). The geo-
membrane is cut around penetrations so that
it lays flat on the sub-grade and tight at all in-
side corners. A thin (20 mil) tack coat of Liquid
Boot® (“A” side without catalyst) is sprayed
within the seam overlap. Once the VI-20™ geo-
membrane is installed, penetrations are then
treated with VI-20™ Detailing Fabric prior to
installation of the Liquid Boot® spray-applied
vapor intrusion membrane and UltraShield™
G-1000 protection course.
PACKAGING
VI-20™ Geomembrane is available in the fol-
lowing packaging option:
• 10 ft. x 150 ft. (3 m x 45 m) Rolls
VI-20™ GEOMEMBRANE
HIGH-PERFORMANCE VAPOR INTRUSION BARRIER
EVOH technology provided in VI-20™
geomembrane has been shown to have VOC
diffusion coefficients 20 times lower than an
80 mil (2 mm) HDPE geomembrane.
TECHNICAL DATATECHNICAL DATA
FORM: TDS_VI-20_GEOMEMBRANE_AM_EN_201705_V2
North America: 847.851.1800 | 800.527.9948 | www.cetco.com
© 2017 Minerals Technologies Inc. IMPORTANT: The information contained herein supersedes all previous printed versions, and is believed to be accurate and reliable. For the most up-to-date information, please visit www.cetco.com. CETCO accepts no responsibility for the results obtained through application of this
product. All products are sold on the understanding that the user is solely responsible for determining their suitability for the intended use and for proper use and
disposal of the product. CETCO MAKES NO WARRANTY OF MERCHANTABILITY OR SUITABILITY FOR ANY PARTICULAR PURPOSE IN CONNECTION WITH ANY SALE
OF THE PRODUCTS DESCRIBED HEREIN. CETCO reserves the right to update information without notice.
VI-20™ CHEMICAL & PHYSICAL PROPERTIES
CHEMICAL PROPERTY TEST METHOD RESULT
Benzene Diffusion Coefficient EPA Method 8260 4.5 x 10–15 m²/s
Ethylbenzene Diffusion Coefficient EPA Method 8260 4.0 x 10–15 m²/s
m&p-Xylenes Diffusion Coefficient EPA Method 8260 3.7 x 10–15 m²/s
Methane Permeance ASTM D1434 < 1.7 x 10–10 m²/d•atm
o-Xylene Diffusion Coefficient EPA Method 8260 3.7 x 10–15 m²/s
Radon Diffusion Coefficient SP Test Method <0.25 x 10–12 m²/s
Toluene Diffusion Coefficient EPA Method 8260 4.2 x 10–15 m²/s
PHYSICAL PROPERTY TEST METHOD RESULT
Membrane Composite Thickness ASTM D5199 20 mil (0.5 mm)
Impact Resistance ASTM D1709 2,600 g
Tensile Strength ASTM E154 Section. 9 58 lbf/in (1.0 N/m)
Water Vapor Transmission ASTM E154 & E96 0.004 grains/hr-ft² (0.0028 g/hr-m²)
Water Vapor Retarder Classification ASTM E1745 Class A, B & C
UPDATED: MAY 2017
VI-20™ GEOMEMBRANE
HIGH-PERFORMANCE VAPOR INTRUSION BARRIER
NOTE:
These are typical property values.
TECHNICAL DATA
North America: 847.851.1800 | 800.527.9948 | www.cetco.com
DESCRIPTION
LIQUID BOOT® 500 is a seamless, spray-ap-
plied, water-based membrane containing no
VOCs, which provides a barrier against vapor
intrusion into structures. LIQUID BOOT® 500
sprayapplication directly to penetrations, foot-
ings, grade beams, pile caps and other irregu-
lar surfaces, provides for a fully-adhered gas
vapor barrier system.
APPLICATIONS
LIQUID BOOT® 500 is used as an underslab
gas vapor barrier, used to minimize vapor mi-
gration into buildings. LIQUID BOOT® 500 is
ideal for methane migration control.
BENEFITS
• Can be installed more economically than
LIQUID BOOT®, resulting in greater savings
• LIQUID BOOT® 500 is comprised of the
same elements as LIQUID BOOT®
• Unique formulation provides superior pro-
tection from methane gas
INSTALLATION
Protect all adjacent areas not to receive gas
vapor barrier. Ambient temperature shall be
within manufacturer’s specifi cations. All
plumbing, electrical, mechanical and structur-
al items to be under or passing through the gas
vapor barrier shall be secured in their proper
positions and appropriately protected prior
to membrane application. Gas vapor barrier
shall be installed before placement of reinforc-
ing steel. Expansion joints must be fi lled with
a conventional waterproof expansion joint ma-
terial. Surface preparation shall be per manu-
facturer’s specifi cation. A minimum thickness
of 60 dry mils, unless specifi ed otherwise.
PACKAGING
LIQUID BOOT® 500 is available in the fol-
lowing packaging options:
• 55 Gallon Drum
• 275 Gallon Tote
EQUIPMENT
• COMPRESSOR: Minimum output of 155–
185 cubic feet per minute (CFM)
• PUMPS: For “A” drum, an air-powered pis-
ton pump of 4:1 ratio (suggested model:
Graco, 4:1 Bulldog). For “B” drum, an air-
powered diaphragm pump (0–100 psi)
• HOSES: For “A” drum, ½” wire hose with a
solvent resistant core (for diesel cleaning
flush), hose rated for 500 psi minimum. For
“B” drum, a 3/8” fl uid hose rated at only
300 psi may be used.
• SPRAY WAND: Only the spray wand sold by
CETCO is approved for the application of
LIQUID BOOT®.
• SPRAY TIPS: Replacement tips can be pur-
chased separately from CETCO.
LIQUID BOOT® 500 spray-application
effectively seals penetrations, footings,
grade beams and other irregular surfaces
that are considered critical vapor intrusion
pathways.
LIQUID BOOT® 500
SPRAY-APPLIED GAS VAPOR BARRIER
TECHNICAL DATATECHNICAL DATA
FORM: TDS_LIQUID_BOOT_500_AM_EN_201712_V1
North America: 847.851.1800 | 800.527.9948 | www.cetco.com
© 2017 Minerals Technologies Inc. IMPORTANT: The information contained herein supersedes all previous printed versions, and is believed to be accurate and reliable. For the most up-to-date information, please visit www.cetco.com. CETCO accepts no responsibility for the results obtained through application of this
product. All products are sold on the understanding that the user is solely responsible for determining their suitability for the intended use and for proper use and
disposal of the product. CETCO MAKES NO WARRANTY OF MERCHANTABILITY OR SUITABILITY FOR ANY PARTICULAR PURPOSE IN CONNECTION WITH ANY SALE
OF THE PRODUCTS DESCRIBED HEREIN. CETCO reserves the right to update information without notice.
TESTING DATA
UPDATED: DECEMBER 2017
LIQUID BOOT® 500
SPRAY-APPLIED GAS VAPOR BARRIER
CHEMICAL & PHYSICAL PROPERTIES
PROPERTY TEST METHOD RESULT
Elongation ASTM D 412 800%
Bonded Seam Strength Tests ASTM D 6392 Passed
Methane Permeability ASTM D 1434 None Detected
Chemical Resistance:Tested at 20,000 ppm <1% weight change
Micro Organism Resistance (Soil Burial):ASTM D4068-88 Passed
Oil Resistance Test ASTM D543-87 Passed
Heat Aging:ASTM D4068-88 Passed
Dead Load Seam Strength City of Los Angeles Passed
Environmental Stress-Cracking ASTM D1693-78 Passed
Water Vapor Permeability ASTM E96 0.22 perms
Adhesion to Concrete ASTM C-836 Passed
Hardness ASTM C-836 Passed
Hydrostatic Head Resistance (Tested at 20 psi)ASTM D-751 Passed
TECHNICAL DATATECHNICAL DATA
FORM: TDS_ULTRASHIELD_G-1000_AM_EN_201705_V2
North America: 847.851.1800 | 800.527.9948 | www.cetco.com
© 2017 Minerals Technologies Inc. IMPORTANT: The information contained herein supersedes all previous printed versions, and is believed to be accurate and reliable. For the most up-to-date information, please visit www.cetco.com. CETCO accepts no responsibility for the results obtained through application of this
product. All products are sold on the understanding that the user is solely responsible for determining their suitability for the intended use and for proper use and
disposal of the product. CETCO MAKES NO WARRANTY OF MERCHANTABILITY OR SUITABILITY FOR ANY PARTICULAR PURPOSE IN CONNECTION WITH ANY SALE
OF THE PRODUCTS DESCRIBED HEREIN. CETCO reserves the right to update information without notice.
DESCRIPTION
ULTRASHIELD™ G-1000 is a polypropylene,
staple fiber, non-woven geotextile. The fibers
are needled-punched, forming a stable net-
work that retains dimensional stability rela-
tive to each other. The geotextile is resistant
to ultraviolet degradation and biological and
chemical environments found in soils. Manu-
facturing Quality Control tests have been
performed and are accredited by the Geosyn-
thetic Accreditation Institute’s Laboratory Ac-
creditation Program (GAI-LAP).
APPLICATION
ULTRASHIELD™ G-1000 is designed for use as
a underslab adhesion protection course spe-
cially designed and required for underslab LIQ-
UID BOOT® applications where the membrane
must remain attached to the underslab of the
building. This is to ensure the membrane re-
mains in place despite soil settlement, which
is common when building is on a landfill.
BENEFITS
ULTRASHIELD™ G-1000 is installed directly
over the finished LIQUID BOOT® vapor intru-
sion barrier, providing superior protection from
other trades.
PACKAGING
• 15 ft. x 180 ft. (4.5 m x 55 m) Rolls
ULTRASHIELD™ G-1000
NON-WOVEN GEOTEXTILE FABRIC
ULTRASHIELD™ G-1000 is a needle-punched, non-woven geotextile with superior tensile strength and puncture resistance.
UPDATED: MAY 2017
PHYSICAL PROPERTIES
PROPERTY TEST METHOD RESULT (ENGLISH)RESULT (METRIC)
Tensile Bond Strength to Concrete³ ASTM C 297-94 7 psi
Mass/Unit Area ASTM D 5261 10.0 oz/yd²339 g/m²
Thickness ASTM D 5199 105 mils 2.7 mm
Tensile Strength ASTM D 4632 270 lbs.1202 N
Elongation ASTM D 4632 50%50%
CBR Puncture Strength ASTM D6241 725 lbs.3226 N
Trapezoid Tear ASTM D 4533 105 lbs.467 N
UV Resistance ASTM D 4355 70%70%
A.O.S.ASTM D 4751 100 U.S. Sieve 0.150 mm
Permittivity ASTM D 4491 1.2 sec–1 1.2 sec–1
Permeability ASTM D 4491 0.30 cm/sec 0.30 cm/sec
Water Flow Rate ASTM D 4491 85 gal/min//ft²3463 l/min/m²
TESTING DATA
NOTES:
1. The property values listed above are effective 04/2011 and are subject to change without notice.
2. All values shown are in weaker principal direction and are Minimum average roll values (MARV), except for AOS, which is a Maximum average roll value.
3. Historical value, based on past testing.

APPENDIX D
LIQUID BOOT® GeoVent, version 1.3 1 © 2009 CETCO

LIQUID BOOT® GeoVent Trenchless Gas Collection System
VERSION 1.3

These Specifications may have changed. Please contact CETCO Remediation Technologies at 714.384.0111 for the most recent version.

PART 1: GENERAL

1.1 SUMMARY OF WORK- Work related to the Soil Venting System includes providing soil vapor extraction piping and LIQUID BOOT®
GeoVent beneath the LIQUID BOOT® gas vapor membrane.

PART 2: PRODUCTS

2.1 MATERIALS

A. LIQUID BOOT® GeoVent is a composite low profile pressure relief, collection and venting system (PRCVS) consisting of a 3-dimensional
vent core and wrapped with a non-woven needle punched filter fabric. This product meets the following specifications:

B. Trenchless Gas Collection System properties:

TEST METHOD

TYPE OF TEST MINIMUM VALUE
ASTM D-1621 Core - Compressive Strength 9,500 psf
ASTM D-1777 Core - Thickness 1.0 in.
ASTM D-4716 Core – Flow Rate (Hydraulic gradient = 0.1) 30 g/min/ft. width
ASTM D-4833 Fabric - Puncture Strength 65 lbs.
ASTM D-4751 Fabric - Apparent Opening Size (AOS) 70 US Sieve
ASTM D-4632 Fabric - Grab Tensile Strength 100 lbs.
ASTM D-4491 Fabric - Permeability 0.21 cm/sec
ASTM D-4491 Fabric - Flow Rate 140 gal. min. ft.²
ASTM D-5261 Fabric - Mass per Unit Area 4.0 oz/yd²
ASTM D-4355 Fabric – UV Resistance 70%

Roll Weight 65 lbs
Roll Width 12 in
Roll Length 165 ft

C. LIQUID BOOT® GeoVent end outlet

D. LIQUID BOOT® GeoVent Interior Footing Sleeves

E. LIQUID BOOT® GeoVent Fabric Reinforced Tape

PART 3: EXECUTION

3.1 INSTALLATION

A. Roll out LIQUID BOOT® GeoVent per layout design as specified by Engineer.

B. Use prefabricated LIQUID BOOT® GeoVent Sleeves where venting is to penetrate interior footings. See the detail describing LIQUID
BOOT® GeoVent through footings.

C. At points of intersection, cut away geotextile to produce rectangular flaps. Interlock exposed dimple board in a Lego-like fashion. Fold flaps
of geotextile in a manner so that the dimple board is covered completely. Secure geotextile folds with LIQUID BOOT® Fiber Reinforced
Tape so that the geotextile is completely impermeable to sand fill.

D. Use LIQUID BOOT® GeoVent End Outlet to attach to solid (imperforated) 2 inch diameter PVC pipe at penetration through building
foundation. Seal/ grout piping at penetrations through foundation using approved methods. See the detail describing connection to a vent
riser.

®

1.1