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Vapor
Intrusion News - September 2005 |
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In
This Issue:
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Ohio
Vapor Intrusion Guidance |
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Johnson
and Ettinger Model Spreadsheet Update |
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Vapor
Intrusion Workshop |
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Brownfields
2005 |
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Contaminated
Property Transaction Symposium |
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Amherst
Annual Conference |
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Air
and Waste Management Association VI Conference |
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Senator
Hilary Clinton Concerned About TCE |
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Featured
Links:
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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 The guidance utilizes the U.S. EPA Draft Guidance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:
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:
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:
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:
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:
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:
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:
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:
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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: |
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