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December 2011
Vapor Intrusion Newsletter
In This Issue:

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EPA Releases Final Health Assessment for TCE to IRIS

In September 2011, EPA released the final health assessment for trichloroethylene (TCE) 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:

EPA releases draft toxicological review of 1,4-dioxane

In late August, the EPA released a draft toxicological review of 1,4-dioxane in support of information on IRIS to the Federal Register. Information can be found at:

EPA OUST Releases Petroleum Vapor Intrusion Document

In September the EPA Office of Underground Storage Tanks (OUST) released a document entitled Petroleum Hydrocarbons and Chlorinated Hydrocarbons Differ In Their Potential For Vapor Intrusion. This document discusses the role of aerobic biodegradation in petroleum hydrocarbon vapor intrusion. The document is available at:

Wisconsin Issues Vapor Intrusion Guidance

The Wisconsin Department of Natural Resources has issued Vapor Intrusion Guidance to be used at remediation and redevelopment sites in the state. The Guidance can be found at:

California DTSC Releases Two Revised Vapor Intrusion Guidance Documents

The California Department of Toxic Substances Control (DTSC) has recently released two newly revised vapor intrusion guidance documents; final VI guidance and a VI Mitigation Advisory document. These two documents can be found at: In addition, DTSC intends to complete a Vapor Intrusion Public Participation Advisory and revised Active Soil Gas Investigation Advisory by year-end.

AEHS Conference in San Diego, March 2012

The annual AEHS conference will take place in San Diego March 19-22. An EPA workshop on vapor intrusion will provide updates on the status of the revised Vapor Intrusion Guidance. Several technical sessions on vapor intrusion will also be held. The preliminary program is expected this month. Information is available at:

Symposium on Redevelopment of Manufactured Gas Plant Sites, Chicago, March 2012

The Fourth International Symposium and Exhibition on Redevelopment of Manufactured Gas Plant Sites (MGP 2012) will be held in Chicago, Illinois on March 27-30, 2012. MGP 2012 will focus on how the remediation and redevelopment of MGPs is taking place today. Information is available at:

ASTM Releases Standard Guide for Identifying and Complying with Continuing Obligations

ASTM recently released ASTM E2790-11 - Standard Guide for Identifying and Complying with Continuing Obligations. This guide is intended to supplement ASTM E1527-05 (the Phase 1 ESA Standard). This guide focuses only on certain continuing obligation pertaining to land use restrictions, institutional controls, and taking responsible steps with respect to releases of chemicals of concern. More information can be found at:

EPA CLU-IN website updates vapor intrusion content

The EPA clu-in website has recently updated content in the vapor intrusion area. More 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 2011. 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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