ABSTRACT
Gas concentration and flow data from a passive soil vapor extraction well collected for 20 days were compared to simulations developed with a multiphase numerical model (T2VOC). The numerical model was able to closely match the field data under barometric pumping conditions. Theoretical distributions and configurations of tetrachloroethylene (PCE) as a dense nonaqueous phase liquid (DNAPL) in the subsurface were numerically analyzed during perturbation by two different flow regimes driven by barometric pumping. Different distributions of DNAPL contaminants were found to exhibit distinctly different profiles of concentration with respect to time. This paper is an extremely abbreviated version of a chapter from “The influence of atmospheric pressure variations on subsurface soilgas and the implications for environmental characterization and remediation” (Rossabi, J., 1999, Michigan: UMI Press).
