GAS VAPOR MITIGATION SYSTEMS

VAPOR INTRUSION

Vapor intrusion has become a significant environmental issue for regulators, industry leaders, and concerned residents nationwide. CETCO offers four uniquely designed vapor mitigation systems developed to meet the needs of your Brownfield redevelopment project. These systems offer solutions for various site conditions, backed by an extensive track record and case history and are designed with the support of our experienced technical managers. CETCO offers innovative gas vapor mitigation systems that will reliable provide the protection from these potentially harmful vapors that could compromise overall indoor air quality.

SYSTEMS AVAILABLE

LIQUID BOOT^® Gas Vapor Barrier System
Liquid Boot is a cold, spray-applied, water-based membrane containing no VOCs, which provides a seamless barrier against vapor intrusion into structures. Liquid Boot is installed under slab and on below grade vertical walls as a gas vapor barrier to minimize vapor and nuisance water (non-hydrostatic conditions) migration into buildings.

Spray application provides excellent sealing of penetrations
Seamless, monolithic membrane means no mechanical fastening required
Superior protection from methane gases and water vapor
Extensive physical and chemical properties product testing

LIQUID BOOT^® PLUS High-Performance Gas Vapor Barrier System
The Liquid Boot Plus system is a combination of Liquid Boot spray-applied membrane and Liquid Boot VI-20, a 20-mil, highperformance polyethylene-EVOH copolymer membrane. Like traditional Liquid Boot®, the membrane is spray-applied to a uniform substrate, provided by the VI-20 geomembrane, bonding together to form a highly resistant protection barrier against gas vapor and nuisance water (non-hydrostatic conditions) migration.

Robust barrier system provides added protection from migrating contaminants
Geomembrane provides high tensile strength and superior stress-crack resistance
EVOH barrier technology provides superior performance compared to HDPE
Ideal for applications with chlorinated solvents, BTEX and other PAHs

COREFLEX^® Methane Barrier & High-Performance Waterproofing System
CoreFlex® is a fully-weldable, flexible membrane liner which functions as both a methane gas barrier and a high-performance waterproofing (hydrostatic conditions) membrane. CoreFlex® features a heat welded thermoplastic membrane with the industry’s heaviest reinforcement plus Active Polymer Core (APC) Technology.

Active sealing waterproofing membrane
Superior puncture resistance, tensile and tear strengths
Methane Barrier approval in Los Angeles County
Eligible for the HydroShield* Quality Assurance Program

GEOVENT™ Gas Venting System
Venting systems should be installed in conjunction with a gas vapor barrier to alleviate the accumulation of volitile or explosive gases from beneath the structure and to vent them. GeoVent™ is a low-profile, trenchless gas collection and venting system designed to improve venting efficiency and reduce installation costs. GeoVent™ can be used as an “Active” or “Passive” venting system depending on the specific project. GeoVent™ can be used with both Liquid Boot and Coreflex barrier systems.

Placed in closer proximity to the gas vapor barrier allowing for more effective venting
Greater opening area per lineal foot of pipe and integral filter fabric allowing for higher ventilation efficiency
Installed at a higher elevation reducing susceptibility to inundation from perched groundwater that may accumulate beneath the building foundation
Flow characteristics meet or exceed that of a typical trenched installation. The overall capacity of the system is far in excess of typical gas flux rates.

BENEFITS OF USING CETCO SYSTEMS

Each CETCO solution provides consistent, reliable results based on previous industry implementations
A simplified application process that alleviates installation time and labor costs
Extensive physical and chemical property testing
State-of-the-art research and development facility
Trained Liquid Boot and Coreflex installers nationwide
QA/QC procedures to ensure a properly installed membrane

PROBLEMS THAT EXIST WITH OTHER BARRIER SYSTEMS

Capability of only handling lower levels of contamination
Inability to attach to critical vapor intrusion pathways such as penetrations, footings, grade beams and other irregular surfaces where air-tight obstruction is crucial.
Reduced quality of materials used
Complexity of installation