Short description and topics:
EXTRACT:
Vapour intrusion (VI) refers to the movement of chemical vapors from contaminated soils or
groundwater through the subsurface and into buildings (indoor air). This exposure pathway has
attracted significant attention from regulatory agencies over the past decade in response to
several
well-publicized cases. Virtually all of the current regulatory documents generated are guidance
and
have not been promulgated as law, allowing for negotiation on the approach to follow in accordance
to site-specific conditions. Nevertheless, experience indicates that this guidance also leads
to higher
costs in mitigation, public relations, and potential litigation. In response to the need for
future
research and development on reducing high costs and uncertainties of VI assessment strategies
(Department of the Navy, DON, 2008), the objective of this report is to identify existing best
practices, knowledge and data gaps, and future research into new strategies and techniques.
This
study was supported by the Navy Environmental Sustainability Development to Integration Program
(NESDI) Program, as part of the study on Improved Strategies for Assessment of Vapor Intrusion,
under direction by the Space and Naval Warfare (SPAWAR) Systems Center Pacific.
This report provides a review by a team of subject-matter experts of current best practices,
opinions on the current state of knowledge and data gaps, and offers suggestions for research
directions
Contaminated land-->Risk assessment-->Exposure pathways
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