Soil Vapor Extraction consists in applying vacuum through extraction wells to create a pressure/concentration gradient that induces gas-phase volatiles to be removed from soil through extraction wells.
Technologies
This technology is also known as in situ soil venting, in situ volatilization, enhanced volatilization, or soil vacuum extraction.
Soil Vapor Extraction is applied to the soil to induce the controlled flow of air and remove volatile and some semi volatile contaminants from the soil. The gas leaving the soil may need be treated to recover or destroy the contaminants, depending on local and state air discharge regulations.
For the soil surface, geo membrane covers are often placed over soil surface to prevent short circuiting and to increase the radius of influence of the wells.
The duration of operation and maintenance for in situ SVE is typically medium- to long-term.
