Ninety-six percent (96%) of survey respondents consider vapor intrusion a concern, with a majority of the respondents working on more than five sites. One-third (33%) of the respondents have a policy or guidance in place, and forty percent (40%) refer to the EPA's Office of Solid Wate and Emergency Response (OSWER) vapor intrusion guidance. All regulatory programs within each state seem to be affected by VI. Forty-two (42%) of the respondents allow for biodegradation at petroleum sites. Less than half of the states look at future use when assessing vapor intrusion.
Click on each question to view results.12. At your agency, is the vapor intrusion pathway:
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