~ ]7 - The Salt Lake City Incident A nuclear device was detonated on or near the ground on July 7, 11, 14 and on 17, 1962, at the Nevada Test Site. A cratering shot also was fired on July 6, 1962 at the Site. With increased alertness to possible environmental contamination and with monitoring methods that had been perfected in recent years which permitted rapid measurements of a large number of samples, the rise of iodine-131 levels in milk in the Salt Lake City environs was followed closely. As the levels rose from nondetectable amounts in early July to peak amounts on July 25, apprehension increased among the officials and residents of Salt Lake City, locatéd about 350 miles northeast of theNevada Test Site. It was understood by them that the (U.S.) Federal Radiation Council's Radiation Protection Guide was 36,500 picocuries of iodine-131 that might be ingested in any one year.8- By the end of July the total ingested (based on usual assumptions and calculations) had risen to 27,000 picocuries, Although the amounts of iodine-131 per liter of milk were decreasing by then, the accumulated intake continued to increase, of course, toward the assumed "end point" of 36,500 picocuries. 37,040 picocuries).?° (The final tally was DOE ARCHIVES The press and others brought strong pressures to bear on the public officials to take action for they had come to understand the "Limit" to be the 36,500 picocuries. The state and city health authorities met with representatives of the milk industry; as a consequence several actions Is