Reference Handbook for Site-Specific Assessment of Subsurface Vapor Intrusion to Indoor Air
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McAlary, T.A ., R. Ettinger and P. Johnson, 2005, Reference Handbook for Site-Specific Assessment of Subsurface Vapor Intrusion to Indoor Air, EPRI, Palo Alto, CA: 2005. EPRI Document #1008492.

Sub-surface vapor intrusion to indoor air is a potential pathway for human exposure at sites impacted by volatile and semi-volatile chemicals; but it can be very difficult to determine whether subsurface vapor intrusion is occurring or the extent to which controls are needed, especially since many chemicals are typically present in indoor air as a result of consumer products, building materials, and even outdoor air. To provide a reference handbook on the sitespecific assessment of subsurface vapor intrusion into indoor air, EPRI’s Vapor Intrusion Interest Group commissioned this Reference Handbook from a team of experts with extensive experience in the study of subsurface vapor intrusion to indoor air. The handbook compiles information on theory, strategy, procedures, interpretive tools, and mitigation measures, along with several other useful and practical resources into a single comprehensive document on the subject. This handbook may be useful for those conducting, reviewing, or responsible for site-specific assessments of subsurface vapor intrusion. It may help to reduce data variability, improve consistency of interpretations, and resolve complex background and ambient air quality interferences.

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