Estimation of contaminant subslab concentration in vapor intrusion

JOURNAL OF HAZARDOUS MATERIALS

卷:231

Article

Yao, Yijun¹  Pennell, Kelly G.¹  Suuberg, Eric M.¹ 

[1] Brown Univ, Sch Engn, Providence, RI 02912 USA

关键词: Vapor intrusion;    Subslab concentration;    Johnson-Ettinger model;    Analytical approximation;    3-D simulation;   

DOI  :  10.1016/j.jhazmat.2012.06.016

来源: Elsevier

【 摘 要 】

This study is concerned with developing a method to estimate subslab perimeter crack contaminant concentration for structures built atop a vapor source. A simple alternative to the widely-used but restrictive one-dimensional (1-D) screening models is presented and justified by comparing to predictions from a three-dimensional (3-D) CFD model. A series of simulations were prepared for steady-state transport of a non-biodegradable contaminant in homogenous soil for different structure construction features and site characteristics. The results showed that subslab concentration does not strongly depend on the soil diffusivity, indoor air pressure, or foundation footprint size. It is determined by the geometry of the domain, represented by a characteristic length which is the ratio of foundation depth to source depth. An extension of this analytical approximation was developed for multi-layer soil cases. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

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