MCP Regulatory Reform Proposal

MassDEP is proposing significant amendments to the Massachusetts Contingency Plan (MCP), 310 CMR 40.0000, as part of the agency’s regulatory reform efforts. The MCP sets forth the procedures and standards for notification, assessment, and remediation of disposal sites resulting from the release of oil and/or hazardous materials to the environment.  These regulations govern the response to sudden oil and hazardous material spills, as well as the assessment and cleanup of Brownfields, properties contaminated by past use as industrial or commercial facilities, prior to their redevelopment and productive reuse. Consistent with regulatory reform goals, the proposed MCP amendments enhance regulatory efficiency in a manner that benefits both parties conducting response actions and MassDEP, while maintaining a high standard of environmental protection.

The proposal include several issues specific to vapor intrusion, including the closure of sites with an active sub-slab system and  consideration of future buildings (and possible vapor intrusion) on currently vacant land.

The MassDEP website ( and then scroll down to the MCP revisions) offers the proposed revisions as both a redline/strikeout document and a “clean” (just the new text) version. The spreadsheets documenting changes to the MCP numerical standards are also available to download, as is a 4-page summery of the proposals.

An extended (until May 17, 2013) Public Comment Period will allow reviewers time to develop comments on this substantial package. MassDEP also expects to hold discussion sessions over the next few months to address specific issues in the proposal.

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)

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.]

Regulatory Framework Draft

MassDEP welcomes your comments on the regulatory framework draft.

Draft 5 Regulatory Framework

Agenda for 6/2/09 Regulatory Framework Subgroup Meeting

Meeting Agenda 6/2/09 Regulatory Framework Subgroup Meeting