This issue paper provides summary information on a wide variety of in situ technologies for the treatment of contaminated soil in both the vadose zone and saturated and unsaturated zones. It presents information on common practices such as soil vapor extraction and bioventing and, less frequently used technologies such as in situ thermal treatment. The paper includes a basic description of the technology, its implementation, applicability based on contaminants and site characteristics, general limitations, costs, and status of the technology's application. This document can also be accessed at http://semspub.epa.gov/src/document/HQ/175834.

• In Situ Treatment Technologies for Contaminated Soil: Engineering Forum Issue Paper (PDF)(35 pp, 962 K, 2006, 542-F-06-013 )