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Comparison between PVI2D and Abreu-Johnson's Model for Petroleum Vapor Intrusion Assessment
Yijun Yao1, Yue Wang1, Iason Verginelli2
1Key Lab. of Environmental Remediation and Ecosystem Health (Ministry of Education), College of Environmental and Resource Sciences, and Research Center for Air Pollution and Health, and Institute of Environmental Science, Zhejiang Univ., Hangzhou 310058, China.
Vadose Zone Journal : VZJ
|February 6, 2018
Summary
A new two-dimensional model, PVI2D, accurately estimates petroleum vapor intrusion, offering results comparable to complex 3D models. This tool simplifies the assessment of soil gas and indoor air concentrations for various site conditions.
Area of Science:
- Environmental Engineering
- Geoscience
- Risk Assessment
Background:
- Petroleum vapor intrusion (PVI) poses risks to indoor air quality.
- Accurate modeling of PVI is crucial for site assessment and remediation.
- Existing models vary in complexity and computational demands.
Purpose of the Study:
- To introduce and validate the PVI2D (petroleum vapor intrusion, two-dimensional) model.
- To compare PVI2D's performance against a established 3D numerical model (AJM).
- To assess PVI2D's utility as a practical alternative for PVI assessment.
Main Methods:
- Development of a two-dimensional analytical model (PVI2D).
- Comparative analysis of PVI2D results with Abreu and Johnson's 3D numerical model (AJM).
- Evaluation of model outputs based on varying source strength, depth, and reaction rate constants.
Main Results:
- PVI2D accurately predicts soil gas concentration profiles.
- PVI2D yields source-to-indoor air attenuation factors within one order of magnitude of AJM.
- Discrepancies are attributed to PVI2D's simplifying assumptions and AJM's numerical limitations.
Conclusions:
- PVI2D provides a valid and simplified alternative to complex 3D numerical models for PVI assessment.
- The model is particularly effective for homogenous source and soil conditions.
- PVI2D facilitates visualization of PVI parameters under site-specific conditions.
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