Use of Radon Measurements for Evaluation of Volatile Organic Compound (VOC) Vapor Intrusion

Use of Radon Measurements for Evaluation of Volatile Organic Compound (VOC) Vapor Intrusion We have utilized a simple method for the collection of gas samples from vapor intrusion investigation sites and the analysis of radon concentrations at an offsite laboratory. The radon data can be used to evaluate the movement of soil gas through building foundations at sites contaminated with volatile organic compounds (VOCs) where vapor intrusion is a concern. The use of radon as a tracer for the movement of soil gas into buildings minimizes the problem of indoor sources associated with the direct measurement VOCs. We have used this method to measure indoor to sub-slab attenuation factors in six buildings with the resulting values ranging from 0.0002 to 0.006 (dim). These values are similar to radon attenuation factors reported by other researchers, but are much lower than default values for VOCs recommended in regulatory guidance (United States Environmental Protection Agency [USEPA], 2002). The vertical radon concentration profile in soil gas can be used to evaluate soil gas mixing with the atmosphere to support the collection of soil gas samples for VOC analysis adjacent to, rather than below, a building. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Environmental Forensics Taylor & Francis

Use of Radon Measurements for Evaluation of Volatile Organic Compound (VOC) Vapor Intrusion

Environmental Forensics , Volume 9 (1) – Mar 17, 2008
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Publisher
Taylor & Francis Group
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1527-5922
eISSN
1527-5930
D.O.I.
10.1080/15275920801888491
Publisher site
See Article on Publisher Site

Abstract

We have utilized a simple method for the collection of gas samples from vapor intrusion investigation sites and the analysis of radon concentrations at an offsite laboratory. The radon data can be used to evaluate the movement of soil gas through building foundations at sites contaminated with volatile organic compounds (VOCs) where vapor intrusion is a concern. The use of radon as a tracer for the movement of soil gas into buildings minimizes the problem of indoor sources associated with the direct measurement VOCs. We have used this method to measure indoor to sub-slab attenuation factors in six buildings with the resulting values ranging from 0.0002 to 0.006 (dim). These values are similar to radon attenuation factors reported by other researchers, but are much lower than default values for VOCs recommended in regulatory guidance (United States Environmental Protection Agency [USEPA], 2002). The vertical radon concentration profile in soil gas can be used to evaluate soil gas mixing with the atmosphere to support the collection of soil gas samples for VOC analysis adjacent to, rather than below, a building.

Journal

Environmental ForensicsTaylor & Francis

Published: Mar 17, 2008

Keywords: vapor intrusion; radon; soil gas; attenuation

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