ATTACHMENT 2 Radiological categories have been established which provide guidelines about the safety and possible uses of specific atoll areas. The corresponding radiological criteria are presented as simple tables or rules. Although the formal criteria appear to be quite straightforward, it is important to realize that the process of calculating or estimating a particular dose may be quite complex. In general, the cumulative dose is composed of the sum of the time~integrated constituent contributions. These constituent contributions include but are not limited to the following possible sources of radiological activity: (a) Distributions and concentrations of sro, co°?, cst 37 and Pur?” etc., in air, soil, vegetation, land animals, water, fish, and other marine biota. -(b) External exposure associated with the air, soil, scrap materials, a structures, etc. In examining any portion of Eniwetok atoll, the relative importance of these constituent contributions will vary on an island-by-island basis and will have to be assessed accordingly by knowledgeable technical personnel. 675°