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April 2007
Vapor Intrusion Newsletter
In This Issue:

EnviroGroup Quick Links:

EnviroGroup Limited
Delaware Vapor Intrusion Policy

In March 2007 the Delaware Department of Natural Resources and Environmental Control issued a policy concerning the investigation, risk determination, and remediation for the vapor intrusion pathway. It involves a twelve step process from screening to investigation and remediation. Sites with risks exceeding 1 X 10 -5 or HI of 1.0 must proceed to remediation. The policy can be found at:

ITRC Training Class

The Interstate Technology and Regulatory Council Vapor Intrusion Team will be presenting the web- based training course "Vapor Intrusion Pathway: A Practical Guide" on May 8 from 2:00 PM to 4:15 PM Eastern Time. David Folkes of EnviroGroup Limited is one of the trainers. Registration can be accomplished at:

AWMA Vapor Intrusion Conference

The Air and Waste Management Association will hold its third vapor intrusion conference " Vapor Intrusion - Learning From the Challenges" on September 26-28 in Providence, RI. Preliminary information on the conference can be found at:

California Bar Association Roundtables

As part of the Twelfth Annual Spring Roundtables on Contaminated Sites the Environmental Law Section of the State Bar of California will include a session on Evaluating and Managing Vapor Intrusion Risks on June 9 in San Diego. David Folkes of EnviroGroup Limited will moderate the session. Information on the roundtable is found at:

Wisconsin Vapor Intrusion Seminar

On May 10 a Vapor Intrusion Consultant's Day will be held in Brookfield, WI by the Federation of Environmental Technologists, Inc. and the Wisconsin DNR. The seminar announcement can be found at:

External Peer Review of 1,1,1-TCA Toxicology

EPA and DOE have engaged the Oak Ridge Institute of Science and Education to convene a panel of experts to review the draft document: "Toxicological Review of 1,1,1-Trichloroethane: In Support of Summary Information on the Integrated Risk Information System". There is currently no quantitative information regarding the toxicity of 1,1,1-TCA on IRIS. The review will be conducted on April 20, 2007 in Arlington, VA. The peer review notice is located at:

The draft document can be found at:

IMA University VI Presentations Available

On February 7, 2007 IMA Environmental Practice and AIG Environmental co-hosted a seminar "Vapor Intrusion: The Next Great Environmental Challenge" in Denver, CO. The power point presentations from that seminar are available at:

EPA Soil Gas Sampling Workshop Presentations Available

On March 21 and 22, 2007 EPA held a soil gas sampling and analytical methods workshop in conjunction with the American Association for Environmental Health and Sciences conference in San Diego, CA. Topics included probe installation methods, sampling issues affecting soil gas concentrations, field and fixed-based analytical methods for volatile and semi-volatile compounds, vadose zone permeability testing, and the use of passive diffusion samplers and tedlar bags. The presentations 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 2006. 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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