Decontamination and decommissioning (D&D) of contaminated facilities began in the late 1 96OYs, but were accelerated in the 1990's, as the remaining DOE program operations at ETEC were terminated, effective September 30, 1995. As part of this D&D program, Rocketdyne performed decommissioning and final status surveys of a number of facilities that supported the various nuclear-related ETEC operations during the latter part of the 1950's and continuing through to the present. Environmental management of DOE contaminated properties continues under the termination clause of the existing Management and Operation (M&O) contract. A facility that was recently addressed was Building 4059.