Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 10-17 |
| Number of pages | 8 |
| Journal | Journal of Hazardous Materials |
| Volume | 231-232 |
| DOIs | |
| State | Published - Sep 15 2012 |
Bibliographical note
Funding Information:This project was supported by grant P42ES013660 from the National Institute of Environmental Health Sciences (NIEHS)/NIH, and the contents are solely the responsibility of the authors and do not necessarily represent the official views of the NIEHS/NIH.
Keywords
- 3-D simulation
- Analytical approximation
- Johnson-Ettinger model
- Subslab concentration
- Vapor intrusion
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis