TCE Updates

MassDEP has recently published several item related to indoor air/vapor intrusion sites.

TCE Status Update
TCE Status Update REVISED 4/18/2013 (PDF): Revised TCE Fact Sheet – 04-18-2013
TCE Status Update REVISED 4/18/2013 (MS Word): Revised TCE Fact Sheet – 04-18-2013
This update provides a summary of the available toxicity information for TCE, the status of the MassDEP review of this information, and an appropriate approach to assessing disposal sites during this review period.

An Example Fact Sheet for an Indoor Air Contamination Site
EXAMPLE-Fact_Sheet_TCE-PCE-DCE_Site.pdf (PDF file)
EXAMPLE-Fact_Sheet_TCE-PCE-DCE_Site.doc (MS Word file)

An Example Notice of Immediate Response Action for an Indoor Air Contamination Site
EXAMPLE_Notice-of-IRA_TCE-PCE-DCE-Site.pdf (PDFfile)
EXAMPLE_Notice-of-IRA_TCE-PCE-DCE-Site.doc (MS Word file)

The Department has also updated the Risk Assessment ShortForms, including those for evaluating indoor air contamination. They can be downloaded from the MassDEP website by clicking on this link:

(The download is a ZIP file containing the ShortForm Excel files, an index and a User’s Guide.)


Vapor Intrusion Workgroup Overheads & Notes

The Presentation material from the July 29, 2010  Vapor Intrusion meeting is now available:

August 25: Future Building Discussion

Future Buildings & Potential Vapor Intrusion

Wednesday August 25, 2010
10:00 AM to Noon

MassDEP Worcester Office
with Video-Conferencing available
at the
MassDEP Boston Office, Room   2202

In the mean time, and in preparation for this upcoming meeting, MassDEP is interested in gathering information, both site-related and product-related, on the use of vapor barrier systems, installation issues, performance standards, and performance demonstration/success rates and posting them on the blog to inform our discussions on this topic.  See, for example:

If you have information that you think would be useful, we would appreciate it if you could post that information on this blog for everyone’s benefit, by Friday, August 20, 2010.


10:00        Introduction – Statement of problem

10:15        MassDEP’s Experience with vapor barriers

10:30        LSPs/Consultants Experience with vapor barriers
(please contact if you would like time on the agenda
to present your experience)

11:00        Presentation of MassDEP’s proposed guidance relative to future buildings

11:30        Discussion

12:00        Adjourn

Discussion document to download: Future Buildings draft 08172010 (MS Word, 260 KB)

Vapor Intrusion/Indoor Air Guidance Survey

The July, 2010 document “Vapor Intrusion/Indoor Air Guidance Survey” is now available.

This report, prepared for MassDEP by Parsons, presents the results of a state and agency survey on vapor intrusion guidance, and results of research on vapor barriers.

Document to download:   Final MassDEP VI Report 072710  (215 pages, 3.8 MB)

Letter from Geosyntec on Vapor Intrusion Modeling

Geosyntec VI Modeling Letter

Compiled Draft Guidance for Summer Review

MassDEP has compiled the draft chapters from the three sub-Workgroups to provide a single DRAFT document for Workgroup review and comment during the summer meeting hiatus.

Word Document (111 pages, 712 KB): July 2009 Draft IA Guidance

Please submit comments by replying to this blog post or by email to
[MassDEP will accept comments throughout the summer, but comments submittede earlier in the summer will be more readily considered in the next draft that is currently being developed by MassDEP staff.  Be reassured, however, that ALL comments received will be considered for either the next or subsequent drafts… we won’t discard them.]

Latest Assessment Section Draft

Here’s the latest.  MassDEP welcomes your comments.