U.S. EPA has signed an inter-agency agreement with the Department of Defense to remediate the Fort Detrick Area B Groundwater Superfund Site in Frederick, Md. In 2009, EPA listed Ft. Detrick Area B Groundwater on the Superfund National Priorities List (NPL), which required EPA and DoD to sign a federal facility agreement governing the cleanup. Under the Superfund law, the agreement grants EPA final authority over cleanup decisions.