Land Science

Technologies: Vapor Intrusion Solutions

Vapor Intrusion occurs when contaminated vapors found below a building migrate into a structure. Contaminated vapors can be generated from activities that took place on or in close proximity to a specific building. The key to successfully preventing vapor intrusion into structures is to successfully block contaminated vapors from finding a pathway into a structure.

A vapor intrusion barrier can be installed to seal off any exposure pathways and a vapor collection system can be used to alleviate the buildup of contaminated vapors underneath the building.

Land Science proudly offers the following technologies:

GEO-SEAL®: VAPOR INTRUSION BARRIER

RETRO-COAT™ VAPOR INTRUSION COATING SYSTEM

VAPOR-VENT™: VAPOR COLLECTION SYSTEM

THESE TECHNOLOGIES CAN BE IMPLEMENTED IN TWO DIFFERENT SCENARIOS:

New Construction

Construction over contaminated land presents a wide variety of challenges. Lenders, insurance companies, property owners, lawyers and public officials are some of the key players who have a stake in making sure newly constructed structures are not adversely affected by vapor intrusion. Each entity will evaluate vapor intrusion differently as there are no concrete standards that govern how to effectively manage vapor intrusion.

The advantage to combating vapor intrusion in a newly constructed structure is the opportunity to properly incorporate building protection measures into the building.

Vapor-Vent is first installed in a permeable layer directly below the membrane.

Next, the Geo-Seal membrane is installed just before the placement of concrete. Placing the membrane directly underneath the concrete slab allows the proper sealing of penetrations into the building as well as other entry points that are present in the foundation or might develop in the future.

Effectively eliminating vapor intrusion pathways in the building foundation and reducing the buildup of contaminated vapors under the building will result in optimal protection for building inhabitants.

Retrofits

The sustainable development movement focuses on the conservation of natural resources. One way natural resources are conserved is through the reuse of buildings. Buildings once used for industrial or commercial use are now being “reused” for new purposes. Contamination resulting from past activities on site, or by other companies off site, can present a vapor intrusion risk.

Because the building is not being demolished, the vapor intrusion mitigation methods can vary depending on project goals and the building conditions.

The installation of Retro-Coat over an existing concrete slab as a finished surface is a viable option when retro-fitting a vapor mitigation (barrier) system into an existing building. Benefits associated with Retro-Coat are:

  1. Less intrusive during construction activities,
  2. Cost effective, and
  3. Once Retro-Coat is cured there is no need for concrete protection above the barrier.

Other retro-fit options are available as well and Land Science can assist in evaluating which scenario best fits your project.

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