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Regulatory Updates

Updates to the NJDEP Vapor Intrusion Guidance document

The NJDEP has finalized the Vapor Intrusion Guidance (October 2005) document to provide assistance in the evaluation of contaminated sites. The document has been modified after consideration of the latest state of the science and comments received on the draft document after it was placed on the web site for external review in June 2005.

The document consists of a phased approach to investigate the vapor intrusion (VI) pathway that follows the basic provisions of the USEPA Draft Vapor Intrusion Guidance, while incorporating New Jersey specific factors/policies, when appropriate. The guidance includes a discussion of the VI pathway, VI screening levels to be used in the evaluation of a site, sampling and analytical requirements, site-specific screening options, remedial options, monitoring and maintenance requirements, community outreach, and a methodology to evaluate background air concentrations.

The following revisions to the draft (June 2005) document have been incorporated into the NJDEP Vapor Intrusion Guidance (October 2005).

Due to routine updates to the screening level tables, it is recommended that the user refer to the NJDEP Vapor Intrusion web site at for the latest information. A notice will be placed on the web site to indicate future changes to this guidance.

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