title: A Petroleum Vapor Intrusion Model Involving Upward Advective Soil Gas Flow Due to Methane Generation.
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.
authors: Yijun
authors: Y
authors: Yao
authors: Yun
authors: Y
authors: Wu
authors: Yue
authors: Y
authors: Wang
authors: Laboratory of Environmental Engineering, Department of Civil Engineering and Computer Science Engineering, University of Rome "Tor Vergata" , Via del Politecnico, 1 00133 Rome, Italy.
authors: Iason
authors: I
authors: Verginelli
authors: Tian
authors: T
authors: Zeng
authors: School of Engineering, Brown University , Providence, Rhode Island 02912, United States.
authors: Eric M
authors: EM
authors: Suuberg
authors: Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China.
authors: Lin
authors: L
authors: Jiang
authors: Yuezhong
authors: Y
authors: Wen
authors: State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum-Beijing , Beijing 102249, China.
authors: Jie
authors: J
authors: Ma
mesh_terms: D000388:Air; D016902:Air Pollution, Indoor / Q000009:adverse effects / Q000032:analysis*; D001673:Biodegradation, Environmental; D003198:Computer Simulation; D005107:Explosions; D005740:Gases / Q000032:analysis; D006798:Housing; D006801:Humans; D008697:Methane / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D008962:Models, Theoretical; D010100:Oxygen / Q000032:analysis / Q000378:metabolism; D010578:Petroleum / Q000032:analysis; D018570:Risk Assessment / Q000379:methods*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry; D055549:Volatile Organic Compounds / Q000032:analysis / Q000737:chemistry
chemical_list: D005740:Gases; D010578:Petroleum; D012987:Soil; D012989:Soil Pollutants; D055549:Volatile Organic Compounds; D008697:Methane; D010100:Oxygen