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Guidance Documents Vapor Intrusion

  

Vapor Intrusion Technical Guidance

NOTICES:

Please be aware that information provided in this Web page may be affected by a DEP Compliance Advisory that was posted on October 4, 2010 at http://www.nj.gov/dep/enforcement/advisories/2010-12.pdf. Please refer to the Compliance Advisory for more information.

The Table 2 indoor air Rapid Action Levels (RAL) may be accessed at http://www.nj.gov/dep/srp/guidance/vaporintrusion/vig_tables1_3.xls.

 

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.

Most Recent Update:

The Vapor Intrusion Technical Guidance (January 2012)

Vapor Intrusion Template Letters & Results Tables Posted 11 May 2011

 houses and vapor intrusion conceptual model

Vapor Intrusion Technical Guidance

Additional Vapor Intrusion Information

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