The FRC identifies the critical segment of the population for which dose projections, for comparison with the guides, are to be made, For instance, for 131; in milk, the critical segment is children, one year of age. In cases where it is not practical to estimate individual doses, action will be based on average values of radiation exposure. for both individuals and a suitable sample are provided. Guides For 131y in milk, the suitable sample is to consist of children approximately one year of age using milk from a reasonably homogendus supply. Numerical guidance for PAG's is provided in two reports, FRC Nos, LagNOPEMReennsoemtteHedieKe«me 5. Bee yioehe yee 5 and 7.2! These guides are summarized in Table II.