( “6: 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 131, in milk, the suitable sample is to consist of children approximately one year of age using milk from a reasonably homogeneous supply. Numerical guidance for PAG's is provided in two reports, FRC Nos. 5 and 7 summarized in Table II. we Rnd