Blog

Indoor Air Guidance Project Blog

http://indoorairproject.wordpress.com/

Mission Statement

MassDEP has convened an Indoor Air Workgroup consisting of representatives from the legal, environmental consulting, and risk assessment communities, along with MassDEP staff, developers and other interested groups.  The goal of the workgroup is to develop comprehensive, updated guidance for LSPs and others to use when addressing sites with vapor intrusion issues 

Meetings & Agendas (when available)

A complete list of upcoming workgroup and subgroup meetings can be found at: http://indoorairproject.wordpress.com/schedule

Data Day - May 4, 2009 @ 9:00 am

As discussed at the last full Workgroup meeting, MassDEP is setting aside Monday, May 4, 2009 to discuss the role of quantitative models in the assessment of vapor intrusion sites. As part of this discussion, MassDEP is soliciting data from vapor intrusion sites in Massachusetts, particularly sites for which paired data - indoor air results and other measured concentrations (groundwater, soil gas, sub slab) -- are available.  The Department has developed a spreadsheet (http://mass.gov/dep/cleanup/laws/iadata.xls) to facilitate the analysis of this data. Please submit data from your sites by April 27, 2009 for consideration at this meeting.  If you would like to request 10 minutes to present your site(s) data, please email Paul Locke at Paul.Locke@state.ma.us. A draft agenda will be available before the meeting.

Participants should also familiarize themselves with he USEPA Indoor Air/Vapor Intrusion Database at http://iavi.rti.org/index.cfm.

Please check the Indoor Air Guidance Project Blog for updated information at http://indoorairproject.wordpress.com/.

Handouts/Publications

Draft Technical Update: Indoor Air Threshold Values for the Evaluation of a Vapor Intrusion Pathway

June 2009
This draft technical update has been revised from the version originally posted 6/26/08 to correct Threshold Values in Table 1for three chemicals where the algorithm used to select the value was incorrectly applied, and to correct other presentation errors.  These revisions are described at the end of Table 1. The text of the draft document has not changed from the 6/26/08 version.
MS Word 353 KB | PDF 173 KB

Vapor Intrusion Audits: Identifying and Mitigating Unacceptable Impacts to Indoor Air

February 2009
Web page

Technical Update: Residential Typical Indoor Air Concentrations

Also includes links to supporting documents: Data Summaries and Indoor Air Studies Spreadsheet
Web page

Indoor Air Studies

NYS Guidance
The NY studies, 1997 and 2003, are presented at Appendix C - Background VOCs
NYS Web site

Indoor Air SOP

This document was written as guidance to MassDEP BWSC staff conducting investigations and remedial activities at sites with known or potential vapor intrusion issues. 
Web page