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This Engineering Issue Paper (EIP) assembles, organizes, and summarizes the current knowledge on soil vapor extraction (SVE) technologies that are available for removing volatile organic compounds (VOCs) from unsaturated soils above the water table. As a technical support document, it describes SVE technologies with a focus on remedial scoping needs. This document summarizes the state-of-the-science regarding the widespread use of SVE as a major treatment technology for removing VOCs from soil. SVE can be applied alone or as an integral component of more complex remedial technologies that volatilize subsurface contaminants (e.g., thermal remediation, air sparging). This EIP provides updated information since the issuance of the original Engineering Bulletin (U.S. EPA, 1991a) and two Engineering Forum Issue Papers (U.S. EPA, 1996a, 1997b) on SVE. It provides information describing SVE and its applicability and limitations; site characterization; design and construction; performance monitoring, evaluation, optimization, and shutdown; complementary technologies; costs; case studies; and references for further information.
