The principal government entities involved at the Spring Valley site are carrying out their roles and responsibilities in cleaning up the site primarily under the Defense Environmental Restoration Program (environmental restoration program), which was established by the Superfund Amendments and Reauthorization Act of 1986. Under the environmental restoration program, Defense is authorized to identify, investigate, and clean up environmental contamination at formerly used defense sites (FUDS). The Corps is responsible for these activities at Spring Valley. Defense is required under the environmental restoration program to consult with EPA, which has its own authority to act at the site under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (sometimes referred to as "Superfund"). Under the program, Defense's activities must also be consistent with a statutory provision that addresses, among other things, participation by the affected states-in this case, the District of Columbia. Under the Corps' program guidance for FUDS, the District of Columbia has a role in defining the cleanup levels at the Spring Valley site. In carrying out their roles, the government entities have, over time, formed an active partnership to make cleanup decisions. For example, the Corps leads the effort to identify hazards, but in many cases it uses the recommendations of the District of Columbia and EPA to look for hazards buried at certain sites. While the entities have not agreed on all cleanup decisions, officials acknowledge that, by having formed a partnership, a means exists to foster communication and collaboration, and officials of all three entities stated that the partnership is operating effectively. Continued progress at the site will depend, in part, on the effectiveness of this partnership over the duration of the cleanup period.