TR 62 - Technology Effectiveness Assessment of Soil Vapor Extraction, by David Barnes, David McWhorter, and Robert Ward, October 1994

Soil vapor extraction (SVE) is an in-situ treatment technology based on the principle that volatile compounds contained in the unsaturated zone will volatilize and establish an equilibrium with the air contained within the pore space between the soil particles. Once equilibrium between the air and the compound is established, the transport of the compound within the unsaturated zone is limited to diffusion, and advection by infiltrated water toward the saturated zone. The volatilization rate of the compound can be enhanced by replacing air within the pore space with relatively fresh air. This technology effectiveness assessment of soil vapor extraction is part of a larger project conducted by the National Institutes for Water Resources (NIWR) for the United States Department of Energy.