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Joint Program: MEREDA & Maine Indoor Air Quality Council - Vapor Intrusion: Introduction and Overview

November 05, 2013 - 7:00AM
to 9:00AM

Holiday Inn By the Bay
88 Spring Street
Portland, ME

About the Event:

Buffet Breakfast at 7:00 am, Program 7:45-9:00 am

Registration is now available through the Maine Indoor Air Quality Councilís website located at http://www.maineindoorair.org/events/147.

MIAQC / MEREDA members:  $30 pp
Non-Members:  $40 pp


Vapor intrusion is the process by which chemicals present in the soils and surfaces underneath a building (such as petroleum products, chlorinated solvents, and radon) can migrate to the indoor air of occupied buildings. This program will provide attendees with an introduction and overview of vapor intrusion concepts and processes, plus provide a summary of advanced approaches and protocols used for vapor intrusion investigations, and data assessment to support informed decision-making. Processes in the soil between the water table and surface and their effects on indoor air quality will also be discussed.  A framework for categorizing building conditions in residential buildings as well as larger commercial/industrial structures with engineered HVAC systems will be presented. 

A general knowledge of vapor intrusion and its potential impact on the indoor air quality in a building is essential for anyone involved in site development, design and management of construction projects for new and existing buildings, real property transfers, and management of existing facilities. The U.S. EPA and the Maine Department of Environmental protection have issued "guidance" limits for the chemicals associated with vapor intrusion.  These limits are rigorous:  they address long-term exposures, not just short-term exposures, and they fall well below OSHA limits for the same chemicals.  The EPA and State Environmental Protection limits are the standard of care to be met by company sites in order to avoid IAQ problems in a building, as well as to minimize risk of litigation.  
The program will:

  • summarize concepts for indoor air quality in buildings generally
  • outline the scientific basis for vapor intrusion,
  • provide an overview of field and laboratory programs
  • review data and observations from detailed subsurface characterization. 
  • review technologies for indoor air sampling
  • highlight the national and state regulations for IAQ in general and vapor intrusion in particular
  • discuss some of the difficulties associated with indoor air quality assessment, including the potential for background sources from ambient air and building use.

Actual vapor intrusion projects and case studies will be used to illustrate the relevant concepts, processes, and methodologies.  


This event is sponsored by: