Author Alissa Barrow, PE, QISP, a professional civil engineer at SCS Engineers, explains how evolving science and regulatory guidance are changing the way facility executives should evaluate vapor intrusion risk. Vapor intrusion occurs when vapor-forming chemicals from contaminated soil, groundwater, sewers, or utility pathways migrate into buildings and affect indoor air quality.
Ms. Barrow emphasizes that older site assessments may no longer be sufficient because regulators now recognize additional exposure pathways, seasonal variability, and changing screening levels. She urges facility leaders to review environmental histories, reassess properties in accordance with current guidance, consider sewer and utility pathways, and take immediate mitigation steps to reduce liability, protect occupant health, preserve property value, and support ESG and indoor air quality goals.
Originally published in the June 2026 edition of Facility Executive, you may read and share Ms. Barrows’ advice using the icons below the article.
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