= 45 average and maximum doses. The Federal Radiation Council suycesis the as of lhe sitsiercry assumetion that the majority of individuals do not vary from the average by a factor greater than three. Thus, we recommend the use of 0.17 rem for yearly whole-body exposure of average ponulation arouns. (Tt is noted that tnis juice is also in essential agreement with current recommencutions of the NCRP and the ICRP.) It is critical that this guide be applied with reason and judement. Especially, it is noted that the use of the averadqe figure, as a substitute for evidence concerning the dose to individuals, is permissible only when there is a probability of appreciable homogeneity concerning the distribution of bhe dose within the population included in the average. Strict adherence to tnese guidelines implies that the ambient air standard should be zero particles, 89 While a variety of suggestions could be proposed, we recommend a slight deviation from these guidelines and the acceptance of the disproportionate risk implicit in the 0.2 particle standard. of This is a workable solution since best estimates lung burdens can be ersctional quantities Thus, we recommend that the MPLPB for members of the public be Q.2 hot particles, and the average lung burden for members of the public be 0.07 hot vnarticles, a factor cf 3 less than the maximum. . 4 79/ FRC Report No. l, Op. cit., p. 27. 80/ Had we based the standard on a 1/10,000 risk per Particle (See Table V), the MPLPB would have been one particle and this problem would not exist. “4 ‘ ‘ . , 4 . . ~¢ . Bere fae. . - PRA) ene oe are ae ” we . ae sa! ry eee on a ~- Voce a -4 va ore yytee . ao ' .. Here# 5, we . . eo. we 70 toa wi if ae a!“ei a a eas ae wg. a,” oe a . ped we yy -