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EnviroGroup Limited
Vapor Intrusion News - September 2005
In This Issue:
 *  Ohio Vapor Intrusion Guidance
 *  Johnson and Ettinger Model Spreadsheet Update
 *  Vapor Intrusion Workshop
 *  Brownfields 2005
 *  Contaminated Property Transaction Symposium
 *  Amherst Annual Conference
 *  Air and Waste Management Association VI Conference
 *  Senator Hilary Clinton Concerned About TCE


Featured Links:
 *  Vapor Intrusion Weblinks
 *  Vapor Intrusion Newsletter Subscription
 *  EnviroGroup VI Services
Ohio Vapor Intrusion Guidance
In April 2005 the Ohio Division of Emergency and Remedial Response issued a Technical Decision Compendium covering their Methodology for Vapor Intrusion Assessment. The guidance utilizes the U.S. EPA Draft Guidance for Evaluating the Vapor Intrusion to Indoor Air Pathway from Groundwater and Soils with specific modifications. Those modifications include using OSHA standards for occupational settings where the same VOCs of concern are still in use, a screening level for excess cancer risk of 1 E-5, California EPA TCE toxicity values, and direct use of the shallow soil gas screening concentrations as the screening values for indoor air in structures with significant openings to the subsurface. The guidance can be found at:

Ohio Vapor Intrusion Guidance



Johnson and Ettinger Model Spreadsheet Update
EPA revised its Johnson and Ettinger model spreadsheets on February 22, 2004. The most significant revision was to remove the default value for soil water filled porosity. This value is now determined by the soil type or entered manually. As before, there are both screening level (one soil stratum) and advanced spreadsheets (up to 3 soil strata) for ground water, soil, soil gas and NAPL sources. The models will calculate either a risk based soil or groundwater concentration, or the incremental risks associated with a defined initial media concentration. The models and the updated user guides are now located at:

Johnson and Ettinger Model Spreadsheets



Vapor Intrusion Workshop
The Association of State and Territorial Solid Waste Management Officials (ASTSWMO) will be holding a workshop titled: "Soil Vapor Monitoring, Vapor Intrusion, and Indoor Air" in San Diego, CA on September 26-27. Leaking underground storage tank vapor intrusion issues will be the focus. A review of the 50 state programs is on the agenda as well as a session on sub-slab sampling. The agenda for the workshop is located at:

Vapor Intrusion Workshop



Brownfields 2005
EPA and the International City/County Management Association will be holding the Brownfields 2005 meeting in Denver, CO on November 2-4, 2005. Registration is free. It will include a "Vaporfields" session on Thursday, November 3, at 2:30 PM where David Folkes of EnviroGroup will speak. The preliminary agenda can be found at:

Brownfields 2005



Contaminated Property Transaction Symposium
A Symposium on Contaminated Property Transactions: Navigating the Deals will be presented by RTM Communications, Inc. in Boston, MA on October, 17-19, 2005. It includes a vapor intrusion round table discussion on October 19 at 8:30 AM. The New Jersey draft vapor intrusion guidance will also be discussed on October 18 at 8:30 AM. The agenda for this meeting can be found at:

Contaminated Property Transaction Seminar



Amherst Annual Conference
The 21st Annual International Conference on Soils, Sediment and Water will be held October 17-20, 2005 at the University of Massachusetts in Amherst, MA. There is an indoor air session on Thursday, October 20 from 1:30 to 5:00 PM. The preliminary agenda can be located at:

Amherst Annual Conference



Air and Waste Management Association VI Conference
The Air and Waste Management Association will be holding a specialty conference on vapor intrusion on January 25-27 in Philadelphia, PA. David Folkes of EnviroGroup will be participating in a panel discussion on remediation strategies on January 27. When available the preliminary agenda for this conference will be available at:

Air and Waste Management Association VI Conference



Senator Hilary Clinton Concerned About TCE
It has been reported by the "TCE Blog" that Senator Clinton of New York has drafted a letter to the EPA Administrator urging the agency to establish protective interim standards for TCE. It is reported that she is seeking the support of fellow senators in signing the letter. The draft letter is found at:

Senator Clinton's Draft Letter




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 2003. 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:  EnviroGroup Limited - Vapor Intrusion Solutions
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