[en] The Environmental Protection Agency (EPA) is developing environmental protection standards for evaluating the risks and characterizing problems associated with disposal of radioactive wastes arising from decontamination and decommissioning (DandD) operations. A list of sites authorized to possess radioactive materials for independent research and development (RandD) was compiled. Available information on operations conducted at these sites was used to project the types, characteristics, and volumes of radioactive wastes likely to be generated during their decommissioning. The facilities were divided into three categories according to the operation conducted and the probability of radiological problems arising during DandD