Formerly Utilized Sites Remedial Action Program (FUSRAP) sites are generally contaminated with low levels of uranium, thorium and radium, and their associated decay products. Mixed wastes (other contaminants mixed with radiological waste) also are sometimes present.
It is important to understand that most FUSRAP sites have low levels of residual radioactivity since the raw product was shipped offsite years ago after the Manhattan Engineer District and Atomic Energy Commission (predecessors of the Department of Energy) work was completed.