of Hawaii Air Force flights collected radioactive samples to the sou The debris was widely dispersed throu out the area, but the maximum radiation levels were low (hundredths of milli- roentgen per hour). southwest between 8 and 10 April. One flight reported a peak 170 nmi of Hawaii at H+56 at 14,000 feet (4.27 km). lection This air sample c point was directly along the path of the 40,000-foot particle trajectory. (315 k airborne (12.19-km) 100 nmi A second radioactive sample was collecte (185 km) southeast of Hawaii 26 hours later at 19,000 feet (5. km). Another less active sample was obtained off the coast of South n Cali- fornia on 12 April. tions of Aircraft operating from Guam made no coll KOON debris. AIRCRAFT DECONTAMINATION. The decay period after the KOON reduced from that of the ROMEO shot (to 20 hours) because of a early turnaround requirement. In addition, Table 41 indicates aircraft were generally only lightly contaminated compared to vious shots. Citric acid washings were discontinued starting e two pre- ith KOON. The first survey of 0.007 R/hr on F-84G No. 049, some 48 hours after the first surveys on the other F-84s, inditates an intensity of abc ut 0.730 R/hr on 7 March, which is reasonable by comparison with other « ircraft. UNION The UNION device, with a yield of 6.9 MT, was detonated at 0610 on 26 April from a barge anchored in 120 feet (37 meters) of wateg in the Bikini Lagoon off Iroij Island. Preshot Preparation The UNION detonation was initially scheduled for 16 April. The appro- priate JTF 7 staff moved from Enewetak to the Bikini area on 1} April; at the midnight briefing, however, the weather was unfavorable an a 24-hour delay was ordered. the wea- By 1500 on 16 April, it became obvious tha ther would not improve within the foreseeable future and the s§ot was postponed indefinitely, subject to the condition that the join} maintain an 18-hour capability to conduct the test. 283 task force