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April 2012
Vapor Intrusion Newsletter
In This Issue:
EnviroGroup Quick Links:
EnviroGroup Limited
In February 2012, EPA released the final health assessment for tetrachloroethylene (PCE) to the Integrated Risk Information System (IRIS) database. The final assessment characterizes the chemical as carcinogenic to humans and as a human noncancer health hazard. Information can be found at:

New Jersey Issues Updated Vapor Intrusion Guidance
In January 2012, the New Jersey DEP released updated Vapor Intrusion Guidance. Information can be found at:

Massachusetts issues Interim Final Vapor Intrusion Guidance
In late December the Massachusetts Department of Environmental Protection released an Interim Final Vapor Intrusion Guidance. The document is available at:

Montana Issues Vapor Intrusion Guidance
The Montana Department of Environmental Quality has issued Vapor Intrusion Guidance. The Guidance can be found at:

Colorado Releases Updated Indoor Air Screening Levels
On March 12, 2012 the Colorado Department of Public Health and Environment released new indoor air screening levels for 22 VOCs, including new values for PCE reflecting the new EPA IRIS toxicity. The new screening levels apply for dry cleaner and other sites. They supercede previous interim risk management values for PCE and TCE. This document can be found at:

Battelle Conference in Monterey, May 2012
The Battelle Conference on Remediation of Chlorinated & Recalcitrant Compounds will take place May 21-24 in Monterey, California. Several vapor intrusion session are scheduled as well as a session on compound specific isotope analysis. The preliminary program is on the website. Information is available at:

Air & Waste Management Association Vapor Intrusion Conference
The sixth AWMA conference on Vapor Intrusion will be held in Denver, Colorado October 3-4, 2012. The abstract deadline is April 2. Information is available at:

EPA issues Technical Documents in support of Final Vapor Intrusion Guidance
EPA OSWER has posted three new technical documents in support of the final Vapor Intrusion Guidance to the website. These include the final Residential Background Indoor Air document, the final Conceptual Model Scenarios document and an updated Evaluation of Attenuation Factors for Chlorinated VOCs in Residential Buildings based on the EPA database. Information can be found at:
phone: 303-790-1340
This newsletter is issued periodically to provide our readers with information on new regulatory and technical developments in the rapidly changing field of vapor intrusion. While every effort is made to ensure that the information and links presented in this newsletter are accurate at the time of publication, they are presented for general information purposes only. Users should independently verify the accuracy and applicability of this information and seek professional advice for any specific sites or purposes. Articles on or links to any document or website do not imply endorsement of that document or website by EnviroGroup. Copyright EnviroGroup Limited 2012. 7009 S. Potomac Street, Centennial, CO 80112.
Please contact us if you have any questions about the topics presented in this newsletter, or vapor intrusion in general. More information about EnviroGroup Limited, including several useful links to vapor intrusion websites, is available at: http://www.envirogroup.com/vaporintrusion.php
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