| This document provides state-of-the-practice information on off-gas treatment technologies for soil vapor extraction systems currently being used to clean up hazardous waste sites. It provides information on common practices such as carbon adsorption and thermal oxidation, less frequently used technologies such as biofiltration, and emerging alternatives including photocatalytic and non-thermal plasma treatment. The report presents the state of the practice for these technologies based on applicability, limitations, performance, engineering considerations, residuals management, cost and economics, and developmental status. |