KERAMIDA offers a full breadth of vapor intrusion services from initial assessment through mitigation design and installation.
What is Vapor Intrusion?
The US EPA defines vapor intrusion as “migration of vapor-forming chemicals from any subsurface source into an overlying building.” These vapor-forming chemicals may include volatile organic compounds (VOCs), select semi-volatile organic compounds and inorganic chemicals, such as elemental mercury, naturally occurring radon, and hydrogen sulfide. The vapors may accumulate in dwellings or occupied buildings to levels that may pose an unacceptable risk of health effects due to long-term (i.e., chronic) exposure. The assessment of the risk of health effects is complicated by the potential presence of some of the same chemicals from emission sources within the building including household solvents, cleaners and gasoline.
KERAMIDA's Vapor Intrusion professionals are highly experienced and prepared to successfully assess and mitigate vapors in the most challenging situations.
Project work has included the assessment of all types of buildings and foundation types (e.g., slab on grade, crawl space, basements, commercial, residential, etc.).
Mitigation systems (i.e., active and passive) have been designed and installed on both commercial and residential buildings and structures.
Multiple projects regularly include paired vapor intrusion sampling with indoor air, sub-slab and ambient (upwind or background) air samples collected for VOCs in accordance with US EPA Method TO-15.
Vapor Intrusion Assessment & Sampling:
Prior to each vapor intrusion sampling event, KERAMIDA personnel conduct a thorough inspection of the building or structure interior (building survey) including:
- looking for utility penetrations
- inventory of vapor emitting products (e.g., paints, cleaning products, etc.)
- interview of occupant and owner
- communication of occupant instructions prior-to and during sample collection
As necessary, building penetrations are sealed and potential interior vapor sources are removed prior to sample deployment. Results of sampling are evaluated by a KERAMIDA professional and compared to applicable regulatory criteria.
Vapor Mitigation System Design & Installation:
Following the vapor intrusion assessment, KERAMIDA can conduct mitigation system design and installation specific to the building and current or future usage.
System design can be completed on existing buildings or structures, new construction, or remodeled buildings. The mitigation design typically includes testing of sub-slab pressures and flows through performance of a pilot test, and owner and/or tenant communication on equipment installation specifics and locations and long-term monitoring and operation requirements. Mitigation system installation is managed by KERAMIDA through our network of contractors or in coordination with client preferred trade professionals performing other services in the building or the project site.