Personnel for manning TU-6 were obtained from the Army, Navy, and Air-Farce. CTU-6. LASL Health Division personnel were utilized as advisors to The majority were obtained from the U.S. Army First Radiological ‘Safety Support Unit, a Chemical Corps unit stationed at Ft. McClellan, Ala. The following is a breakdown of personnel attached to TU-4é: 1. Army - 95 officers and enlisted men. 2. Navy - 8 officers and enlisted men. SameAtr Force - 12 officers and enlisted men. 4. LASL - 4 civilian health physicists as advisors. §. UCRL - 8 civilian health physicists as advisors. Seientific project personnel in TG 7.1 and contractor personnel in TG 7.8 were requested to provide their own monitors for recovery and construction missions. A 4-day school was operated at EPG specifically to train such monitors. The schooling was found to be a very satisfactory ar~ rangement. In support of TG 7.1 and 7.5 at both Bikini and Eniwetok, check points were established as required. Main check points utilized at all times at both atolls were located at the air dispatcher's office and the marine landing. All personnel entering or returning from a radex area were processed through the check points. An area was considered "full radex" if the gamma radiation field exceeded 100 mr/hr. Full protective clothing was required for entry into a full radex area. Limited radex areas were established when the gamma radiation fleld exceeded 10 mr/hr but was less than 100 mr/hr. Clothing requirements varied with the situation in the limited radex areas. An area in which the gamma radiation field was less than 10 mr/hr was considered non-radex. The following is a summary of rad-safe processing: 1. A total of about 6200 persons were processed through the Eniwetok check points from May 1, 1958, to August 20, 1958; 2700 persons were proc- eseed at Bikini from May 13, 1958, to August 5, 1958. 2. The personnel decontamination station at Eniwetok handled a total 3. The following equipment was decontaminated: of 860 individuals, and the facility at Bikini processed about 1200. Eniwetok Vehicles Pieces of equipment Aircraft (including helicopters) Heavy equipment Bikini 56 611 9 100 28 193 4 70 The majority of the rad-safe surveys of both atolls were conducted by helicopter. Normal operations included a pre-entry survey with CTG 7.1 at H + 1 to 4 hr, followed by detailed surveys at H + 6 to 8 hr, and mornings of D + 1, 2, and 3 days. Additional surveys were made as required. Instru- ments used in the surveys were AN/PDR-39's converted to read to 500 r/hr. Ground surveys of islands in the atolls were conducted when required. Fallout from the Fir device was evident at both atolls. Peak activity at Eniwetok was 20 to 25 mr/hr, at Bikini 12 mr/hr. Minor activity was observed following other shots in the series but total dose received was insignificant. It is estimated that the average personnel dose due to fallout in the living areas at Eniwetok was 1200 to 1500 mr, that at Rikint 300 mr. 127