7 ~fn agencies, but thus far [ have cusc.vered onl, cwo ceterences (6:3) giving ome of these results. Further data ar: tevded - especially for the yeaws L35L, 1952, 1987 and 1355. To allow tar cirferent time: of arrival. I have atiusted atic concen- trations to a common relerence time of 1 day, after wot nation assuming a (time) 1*¢ variation in activity. Unfortunately, reference zive the time from burst tc assay for the Easy 92) shots. Results are Listed in Table @. (6) does not (7 May 32) and Fox (25 May Tunes of explosion and kilotan yields are from The Effects of Nuclear Weapons 1962 (9) In some cases a mumber of air samples were taken scrially during a 24 hour period. In such instances each adjusted air concentration was multi- plied by the fraction of a day it was sampled. Then these results were | added to obtein the weighted average concentration for the entire 24 hour period. If one assumes 2 proportionality between beta activity in the air and yi3t reaching man through the food chain it is possible to crudely estimate thyroid exposures for those years for which air data are available. are shown in Table 3.° YEAR OF 1952 ae 1953® 1985 1957 1958 1962 *St. George Results Table 3 . “Gn a, so re : , 2 ? ? 30,450 ¥,872 3,522 240 , 000 ESTIMATED AV. DEANT TKYROID ? ? 8.6 lel 1. 9eee 68 **Time after burst, not given ©) | has been assumed by me (perhaps incorrect- ly) to be 1 day. **tCalculated from measured — emma [ 131 i, milk.