Abstract: Field tests using air extraction and injection in both horizontal and vertical wells are evaluated to estimate air conductivity and porosity in the vadose zone. Six extraction tests and four injection tests were conducted. ...

Abstract: Numerical simulations were used to evaluate the effects of vapor extraction operations on contaminant loadings to the atmosphere, the ground water, and to the vapor extraction well under application of vapor extraction. A ...

Abstract: Accurate prediction of air transport parameters in variably saturated soil is a prerequisite for realistic modeling of soil vapor extraction (SVE) systems for cleanup of contaminated soil sites. Improved models for estimating ...

Abstract: Vapor sorption of volatile organic chemicals (VOC) to soil minerals becomes the dominant VOC sorption mechanism at low soil-water contents, but is not included in traditional VOC transport and fate models. A two-parameter ...