Whatcom Environmental assists clients in performing vapor intrusion assessments for their sites, in compliance with Ecology and EPA standards. Vapor intrusion assessments include conducting a Vapor Encroachment Screening to determine the risk of vapor intrusion during Phase I Environmental Site Assessments and when conducting cleanup operations at contaminated sites. The screening process uses background information regarding soil and groundwater and nearby contaminated sites to broadly determine if a site is at risk for vapor intrusion.
If a site fails the screening, a Site Investigation can be conducted to further delineate the likelihood of vapor intrusion at a site. Site Investigations involve using soil, groundwater, and soil gas data to determine if additional investigation is needed or if the site needs to be managed for vapor intrusion. Whatcom Environmental uses a gas vapor probe kit and summa canisters to collect near-slab and sub-slab soil gas samples.