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 Guidance
Documents Vapor
Intrusion
Vapor Intrusion Guidance
The presence of volatile chemicals in contaminated soil or ground
water offers the potential for chemical vapors to migrate through
subsurface soils and/or preferential pathways (such as underground
utilities) thereby impacting the indoor air quality of area buildings.
Vapor intrusion refers to this migration of volatile chemicals from
the subsurface into overlying buildings. The Vapor Intrusion information
linked from this page represent specific guidance developed by the
Department to assist in the investigation of the vapor intrusion
pathway at contaminated sites.
It is recommended that the user periodically refer to the NJDEP
Vapor Intrusion web site for the latest information on the vapor
intrusion pathway. The Department will update the screening level
tables included in the document soon after new toxicity factor information
becomes available from USEPA Region III. Region III currently updates
their Risk Based Concentration (RBC) Table twice a year (April and
October).
The Department will also update the guidance document as the state
of the science advances in the evaluation of the vapor intrusion
pathway. Updates to the document and the associated tables will
be highlighted in the “What’s
New” section of the Web site.
Contacts
For site-specific questions on vapor intrusion pertaining to cases
within the Department, interested parties should contact the case
manager directly. General questions on the vapor intrusion pathway
may be directed to the following individuals.
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