Management of Certain Plutonium Residues and Scrub Alloy Stored at the Rocky Flats Environmental Technology Site (December 1998) The Department of Energy (DOE) has decided to prepare the categories of plutonium residues and scrub alloy listed for disposal or other disposition as specified in the Preferred Alternative contained in the Final Environmental Impact Statement on Management of Certain Plutonium Residues and Scrub Alloy Stored at the Rocky Flats Environmental Technology Site (the Final EIS, DOE/EIS–0277F, August 1998)