~20— follout sufficiently intense to reeuit in nedieally sigmificant radiation exposure to childrens! thyroids in an appreciable number of instances. Some locations in tie Nevada recion nave reccived such possible dosages on repeated occasions. Currant, Nevada, for nstance, a town of about 75 people located about 80 niles north of the test site, received significant doses on March 7, 1955; May 5, 1955; May 28, 1957; July 15, 1957; July 25, 1957; and august 18, 1957. Infant thyroid doses would all be creater than 2.5 rads, and in 4. ¢ases out of the 5, could nave exceeded 25 rads. Another example is Lockes, Nevada wnich reccived three significant doses, all of which were 10 rads or more by the lower estimate. By the higher estinate, the doses on two occasions may have exceeded 100 rads. Washington county, Utah is one of the most heavily popu~ lated of the areas to receive heavy fallout depositions. it is an area in'which, on at least one occasion (May 19, 1953), citizens in several communities were asked to stay indoors for several hours after a test shot. Fallout on that date blanketed the entire county. Infant thyroid doses due to contaminated milk might have reached from 150 to 950 rads .. in Hurricane, Utah, and it is very likely that the mininun dose for infants in most of the county due to milk from cows fed fresh pasturage was about 506 rads. The largest town in Washington County, St. George, @opulation 5,000) received possible maximum doses of