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The Vapor Intrusion training course address investigating and evaluating the vapor intrusion pathway, including data evaluation and mitigation approaches.

Vapor Intrusion Pathway: A Practical Guideline

Vapor Intrusion is the migration of volatile chemicals from the subsurface into overlying buildings. Volatile chemicals may include volatile organic compounds, select semi-volatile organic compounds, and some inorganic analytes, such as elemental mercury and hydrogen sulfide. Degradation of the indoor air quality causes a great deal of fear and anxiety among building occupants, business, and other property owners. Vapor intrusion has become a significant environmental issue for regulators, industry leaders, and concerned residents. Vapor intrusion requires three components: the source, an inhabited building, and a pathway from the source to the inhabitants.

The ITRC Vapor Intrusion Team was composed of representatives from 19 state environmental agencies, 12 environmental companies, and four federal agencies (including EPA). This team developed the ITRC Technical and Regulatory Guidance document Vapor Intrusion Pathway: A Practical Guideline (VI-1, 2007), companion document Vapor Intrusion Pathway: Investigative Approaches for Typical Scenarios (VI-1A, 2007), and this Internet-based training course to be used by regulatory agencies and practitioners alike. This Internet-based training course provides an overview of the vapor intrusion pathway; summarizes introductory information on the framework (evaluation process), investigative tools, and mitigation approaches; and utilizes typical scenarios to illustrate the process.

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