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J Air Waste Manag Assoc

Title:		The use of indoor air measurements to evaluate intrusion of subsurface VOC vapors into buildings
Author(s):		Hers I; Zapf-Gilje R; Li L; Atwater J;
Address:		"University of British Columbia, Vancouver, Canada. ihers@golder.com"
Journal Title:		J Air Waste Manag Assoc
Year:		2001
Volume:		51
Issue:		9
Page Number:		1318 - 1331
DOI:		10.1080/10473289.2001.10464356
ISSN/ISBN:		1096-2247 (Print) 1096-2247 (Linking)
Abstract:		"The implementation of a risk-based corrective action approach often requires consideration of soil vapor migration into buildings and potential inhalation exposure and risk to human health. Due to the uncertainty associated with models for this pathway, there may be a desire to analyze indoor air samples to validate model predictions, and this approach is followed on a somewhat frequent basis at sites where risks are considered potentially significant. Indoor air testing can be problematic for a number of reasons. Soil vapor intrusion into buildings is complex, highly dependent on site-specific conditions, and may vary over time, complicating the interpretation of indoor air measurements when the goal is to deduce the subsurface-derived component. An extensive survey of indoor air quality data sets highlights the variability in indoor volatile organic compound (VOC) concentrations and numerous sources that can lead to elevated VOC levels. The contribution from soil vapor is likely to be small relative to VOCs from other sources for most sites. In light of these challenges, we discuss how studies that use indoor air testing to assess subsurface risks could be improved. To provide added perspective, we conclude by comparing indoor air concentrations and risks arising from subsurface VOCs, predicted using standard model equations for soil vapor fate and intrusion into buildings, to those associated with indoor sources"
Keywords:		"Air Pollution, Indoor/*analysis Biodegradation, Environmental Environmental Monitoring/*methods Humans *Models, Theoretical Risk Factors Soil Pollutants/analysis/*metabolism Volatilization;"
Notes:		"MedlineHers, I Zapf-Gilje, R Li, L Atwater, J eng Research Support, Non-U.S. Gov't 2001/09/29 J Air Waste Manag Assoc. 2001 Sep; 51(9):1318-31. doi: 10.1080/10473289.2001.10464356"