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Vapor Intrusion (VI) is a risk when contaminant vapors
are present near a building foundation and then migrate into
the space of the structure.

Solutions 2017-01-20T15:59:26+00:00

VAPOR INTRUSION PROBLEM

The risk of Vapor Intrusion (VI) occurs when there is the potential of a migration of petroleum products or volatile chemicals from contaminated groundwater, soil or a vapor plume into an overlying building. Petroleum products and volatile chemicals in the vapor phase may migrate through subsurface soils into indoor air spaces in ways similar to that of radon gas seeping into homes. These chemicals may include volatile organic compounds and select semi-volatile organic compounds, as well as some inorganic analytes.

OUR  SOLUTION

 

Worker spraying vapor barrier

After assessing of the vapor concentrations below a building and determining that a potential for vapor intrusion into a structure is realized, there are two possible paths for addressing this risk. The first is risk profiling through more sampling and analyses. The second is the installation of a mitigation facility. VMS will guide you through these two paths to develop the most cost and time-effective strategy for you.

In certain instances, risk profiling may be the lower cost solution to addressing potential VI risk. However, while it may be cost-effective, it may also be time prohibitive, requiring multiple site assessments, data analysis, reporting and consulting. These factors may greatly lengthen the time required in completing a real estate development project. This path may also lengthen the time required in solving an immediate question of safety to building occupants where VI is determined to be a potential risk.

Types of Chemical Vapor Barriers used in VI Mitigation

vapor barrier material chart

The second path VMS utilizes is a chemical vapor barrier that is a composite membrane system. This solution takes the advantages of chemically resistant, high-density polyethylene and combines it with the benefits of spray-applied membranes. Below the vapor resistant membrane is a venting system, which is designed for the footprint of the building. This venting system allows the chemical vapors held back from migrating into the building by the vapor membrane barrier to be vented out of the sub-slab of the building through a vent pipe and away from the building and its occupants. The combination allows VMS to offer a system that is designed specifically to mitigate contaminant vapor intrusion for new structures.

What if you are presented with the need to protect occupants in an existing building where it is infeasible to install the two-tiered chemical vapor barrier described above? VMS also provides a solution for existing structures whose sub-slab vapor is contaminated and the potential for VI has been determined. VMS can install an engineered sealant product specifically designed to repel the transmission of sub-slab vapor. This product has been rigorously tested and has proved to substantially reduce the influx of harmful vapors into an overlying building.

Our chemical vapor barriers have been accepted by state environmental agencies, branches of the military and environmental consulting firms around the world.

CONTRACTORS

Have you been recently given a job that calls for some type of chemical vapor barrier? We have experts who work closely with contractors in order to deliver the perfect, most cost-effective vapor mitigation solution based on the required specs.

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ARCHITECTS

We offer architects our knowledge and experience in vapor mitigation as consultants. Our team at Vapor Mitigation Strategies will sit down with you and review environmental reports and work with you on the development of the scope of your project.

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NEWS

If I Knew Then…. Interview with Jackie Robb

  The Mistake: Jackie Robb, Prinicpal Feeling as though I needed to know all the answers. I've been in consulting here at Wellington for 25 years and before that for seven years. When [...]

Vapor Mitigation Strategies’ Director of Technical Strategies and Applications Earns Certified Inspector Credentials

Vapor Mitigation Strategies’ Director of Technical Strategies and Applications Earns Certified Inspector Credentials Wes Robb furthers VMS’ expertise in the field with Land Science Certification St. Louis-based Vapor Mitigation Strategies, [...]

CONTACT

Want to know a little more about how we can help you and your team? Give us a ring or fill out our contact form to learn more.

314-342-9749

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