A Petroleum Vapor Intrusion Model Involving Upward Advective Soil Gas Flow Due to Methane Generation

Environmental Science & Technology
Yijun YaoJie Ma

Abstract

At petroleum vapor intrusion (PVI) sites at which there is significant methane generation, upward advective soil gas transport may be observed. To evaluate the health and explosion risks that may exist under such scenarios, a one-dimensional analytical model describing these processes is introduced in this study. This new model accounts for both advective and diffusive transport in soil gas and couples this with a piecewise first-order aerobic biodegradation model, limited by oxygen availability. The predicted results from the new model are shown to be in good agreement with the simulation results obtained from a three-dimensional numerical model. These results suggest that this analytical model is suitable for describing cases involving open ground surface beyond the foundation edge, serving as the primary oxygen source. This new analytical model indicates that the major contribution of upward advection to indoor air concentration could be limited to the increase of soil gas entry rate, since the oxygen in soil might already be depleted owing to the associated high methane source vapor concentration.

References

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Citations

Mar 27, 2016·Journal of Hazardous Materials·Iason VerginelliEric M Suuberg
Feb 7, 2017·Ground Water Monitoring & Remediation·Iason VerginelliEric M Suuberg
Mar 4, 2017·Water Resources Research·Yijun YaoEric M Suuberg
Oct 13, 2017·Environmental Geochemistry and Health·Dawit N BekeleSreenivasulu Chadalavada
Apr 11, 2021·Journal of Contaminant Hydrology·Iason Verginelli, Renato Baciocchi
Jul 16, 2021·The Science of the Total Environment·Aravind UnnithanRavi Naidu
May 10, 2020·Environmental Science & Technology·Jie MaLin Jiang

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