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February 2007
Vapor Intrusion Newsletter
In This Issue:

EnviroGroup Quick Links:

EnviroGroup Limited
ITRC Guidance Documents and Seminar

The Interstate Technology and Regulatory Council’s Vapor Intrusion Team has released its first two publications. “Vapor Intrusion Pathway: A Practical Guide” is a detailed introduction to the pathway covering strategic overview, preliminary screening, site investigation, and remediation. “Vapor Intrusion Pathway: Investigative Approaches for Typical Scenarios” is a supplement to the first document detailing investigation approaches for six common site scenarios. The documents may be found at:

A live internet seminar on the first document has been scheduled by ITRC for March 15, 2007 from 11 AM to 2:15 PM EST. Registration information can be found at:

New York Final Vapor Intrusion Guidance

In October 2006 the New York State Department of Health finalized the document: “Guidance for Evaluating Soil Vapor Intrusion in the State of New York”. This document covers soil vapor investigations, data evaluation, mitigation, and community outreach. Decision matrices for TCE, PCE, and other volatile organics are included in Chapter 3. Appendix C is a detailed summary of background data for volatile organic chemicals. The guidance document can be found at:

New York Strategy for Evaluating Soil Vapor Intrusion

On October 18, 2006 the New York State Department of Environmental Conservation issued the document “DER-13 – Strategy for Evaluating Soil Vapor Intrusion at Remedial Sites in New York”. This strategy states that all past, current, and future contaminated sites will be evaluated to determine if they have the potential for soil vapor intrusion. The document also includes a process to prioritize DEC lead remedial sites for this evaluation. The strategy is located at:

U.S. Army Interim Vapor Intrusion Guidance

On November 6, 2006 the U. S. Army issued an Interim Vapor Intrusion Policy for Environmental Response Actions covering both existing and future buildings. The policy states that modeling is the first step to be taken and then a vapor intrusion study may be undertaken to decide if indoor air/background sampling is appropriate. The policy mentions a DOD technical guidance for assessing the vapor intrusion pathway under development by the Tri-Service Environmental Risk Assessment Working Group. The cover memo for the Army policy is located at:

The interim Army policy itself is found at:

California Governor Vetoes Vapor Intrusion Bill

On September 29, 2006 Governor Schwarzenegger vetoed Assembly Bill 2092, a proposed amendment to the California Health and Safety Code. The bill was passed by the state Senate on August 28, 2006 and would have required the Department of Toxic Substances Control to compile a list of sites with known or potential vapor intrusion, to post it on the agency’s web site, and to update it annually. The governor stated his reasons for the veto as: the bill is unnecessary and may inadvertently stigmatize a site, there are already effective measures in place to address this exposure pathway, and that the bill does not provide for removal of sites from the list after they have been cleaned up or determined not to pose a risk. The veto message can be found at:

Vapor Intrusion Update

The IMA Financial Group, Inc. will present a half day program “Vapor Intrusion, The Next Great Environmental Challenge: 2007 Update” on February 8, 2007 in Denver, CO. There are eight speakers scheduled including David Folkes, president of EnviroGroup Limited. The meeting will be held at the Lexus Club in the Pepsi Center and runs from 10:45 AM until 2:45 pm. The announcement of the program is found at:

AEHS Conference in San Diego

The American Association for Environmental Health and Sciences will hold its 17th Annual West Coast Conference on Soils, Sediments, and Water on March 19-22, 2007 in San Diego, CA. The preliminary program includes a vapor intrusion session on Monday, March 19, from 1:00 to 5:00 PM. The announcement of the conference is 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 2007. 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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