PCE Toxicity Value Review

On February 10, 2012, U.S. EPA published a final Health Assessment for Tetrachloroethylene (Perchloroethylene, or “Perc” or PCE) on the IRIS database (http://cfpub.epa.gov/ncea/iris/index.cfm?fuseaction=iris.showQuickView&substance_nmbr=0106). In the new Health Assessment, EPA provides revised toxicity values for oral exposures (a reference dose [RfD] for non-cancer and a cancer slope factor [CSF] for cancer risk) and for inhalation exposures [...]

Vapor Intrusion Discussion Summary

A summary of the February 9, 2012 discussion about revisions related to the Vapor Intrusion pathway is now available. These are notes from the discussion and not MassDEP’s interpretation. For those who participated in the conversation, please read the notes and comment on anything we may have missed or misinterpreted. For those who missed the meeting, this is [...]

Questions to Ponder for Workgroup Meeting

A list of topics and discussion items for the February 9, 2012 workgroup meeting has been posted on the MCP Reg Reform Blog.

Workgroup Meeting

During the development of the Vapor Intrusion Guidance, MassDEP staff and Workgroup members identified several potential changes to the MCP that could strengthen and streamline the notification, assessment, cleanup & closure of vapor intrusion sites.  A Workgroup meeting has been scheduled to discuss such potential regulation revisions: Thursday, February 9th, 1:00 – 3:00 pm @ [...]

Next Meeting: 12/20/2011

MassDEP has scheduled a Vapor Intrusion Workgroup Meeting for Tuesday December 20th at 9:30 at 1 Winter Street, 2nd floor. The purpose of the meeting is to:  discuss the comments received on the December 2010 Draft Vapor intrusion Guidance and MassDEP’s responses; discuss the changes made to the December 2010 Draft and provide an overview [...]

Comments on Draft Vapor Intrusion Guidance

MassDEP would like to thank you for submitting comments on the Draft Vapor Intrusion Guidance Document (December 2010).  We are currently organizing and reviewing the comments and we intend to compile a written summary of the comments and provide written responses which outlines how best to revise the guidance to address them. We will keep the [...]

Presentation: VI Guidance Update

On Tuesday, January 11, 2011, Gerard Martin (MassDEP) was the guest speaker at the Licensed Site Professional Association (LSPA) monthly membership meeting. The presentation was titled, “Vapor Intrusion Guidance Update”, and was intended to provide a summary of what’s in the draft guidance document to facilitate the LSPA members’ review and comment. The PowerPoint slides [...]

Vapor Intrusion Guidance – Public Review Draft

Vapor Intrusion Guidance public review draft is now available. MassDEP is seeking public comment on its revised Vapor Intrusion Guidance draft.  This comprehensive draft document has been developed based on input MassDEP has received through discussions with the Indoor Air Workgroup and in other forums with LSPs, PRPs and other interested parties and written comments [...]

Vapor Intrusion Workgroup Overheads & Notes

The Presentation material from the July 29, 2010  Vapor Intrusion meeting is now available: in PowerPoint 2007:  Vapor Intrusion Workgroup Meeting July 2010 in Adobe PDF:  Vapor Intrusion Workgroup Meeting July 2010

August 25: Future Building Discussion

Future Buildings & Potential Vapor Intrusion Wednesday August 25, 2010 10:00 AM to Noon at 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 [...]