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:  http://www.mass.gov/dep/cleanup/compliance/shortforms.zip.

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

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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 @ MassDEP, One Winter Street, Boston, MA 02108

In addition, this and other reg reform initiatives will be on the agenda for the January 26, 2012 Waste Site Cleanup Advisory Committee meeting (9:30 AM – 12:00 PM, MassDEP Boston).

Vapor Intrusion Audits

The following letter was prepared by Janine Commerford, Assistant Commissioner, MassDEP Bureau of Waste Site Cleanup, and published in the February, 2009 LSP Association Newsletter, http://www.lspa.org.


Vapor Intrusion Audits

Identifying and Mitigating Unacceptable Impacts to Indoor Air

MassDEP’s Bureau of Waste Site Cleanup is undertaking an evaluation of conditions at certain sites with Response Action Outcomes filed prior to April 2006, where the concentration of PCE (tetrachloroethylene) in groundwater may exceed the current GW-2 standard, to determine whether there may be vapor intrusion into nearby occupied buildings. Conditions at these sites may in fact be safe, but in light of the health concerns related to ongoing exposures to volatile chemicals in indoor air, MassDEP considers it necessary to determine whether vapor intrusion is occurring. Continue reading