Development of a CERCLA Multimedia Containment Remedy within an Active Stream Channel

Under an Administrative Consent Order between a Group of PRPs (the Group) and the United States Environmental Protection Agency (USEPA), the Group was required to install a pump and treat system to mitigate ongoing chemical discharges to a stream. The site, comprised of approximately 8 acres located largely within the flood plain of a local tributary to the Chesapeake Bay, was used as a solvent recovery facility from the 1960s through the 1980s. The facility managed large numbers of drums and tanks for the storage and processing of solvents. Solvents were released to the subsurface and site studies show they leached into the soil, ground-water, and stream sediments resulting in three roughly co-equal sources of mass contribution to surface water in the