These proceedings describe a workshop at which biological remediation of contaminated sediments was discussed. For the purpose of the workshop, contaminated sediments of primary interest were those within six of the Areas of Concern (AOC) identified in the U.S./Canada International Joint Commission's Great Lakes Water Quality Board; five of these AOC are priority concerns of the U.S. Environmental Protection Agency's Assessment and Remediation of Contaminated Sediments (ARCS) Program. The workshop was organized around four topic areas: (1) Overview of the Areas of Concern, (2) Biological degradation of PCBs; (3) Biological degradation of PAHs, and (4) Biological treatment of metal species. For the first topic area, presentations were made describing site characteristics of the Ashtabula River, OH; the Buffalo River, NY; the Sheboygan River, WI; the Grand Calumet River, IN; the Saginaw River and Bay, MI; and the Hamilton Harbor, Ontario, Canada. For the remaining topic areas, presentations were made by investigators actively involved in either bench, pilot, or full-scale studies concerning these areas. The document provides extended abstracts and brief summaries of the presentations and discussion sessions at the workshop.

"EPA/600/9-91/001." Photocopy.