a. Gamma - a maximum of 3.75 roentgens per any consecutive 13 week period, with a maximum of 5.0 r during the Operation. b. Exceptions - on an individual basis and approved by CTG 7,5 and the CJTF-Seven, The gamma exposure criteria for TG 7.5 personnel was further restricted to 5.0 r for the calendar year. 3.4 Dosage Records A summary of the dosages received by TG 7,5 personnel from 1 April through 4 September 1958 follows. Dose in mr No dosage 1 - 499 500 -~ 999 1000 - 1999 2000 - 2999 3000 - 3750 3751 - 5000 Over 5000 Total No. of Persons 676 Percent 19.5 493 378 1330 472 78 37 0 14,2 10.9 38.4 13,6 2.3 i, 1 0 3464 100.0% The 48-hour fallout at Site Elmer that followed the Fir and Koa events contributed significantly to the radiation dose of TG 7.5 personnel, as much as 1500 mr for persons remaining at Site Elmer for the duration of the Operation, Therefore, it was necessary to request that the guide of 3750 mr per 13 week period be increased, and also, the 5000 mr dose for the Operation be increased to 10,000 mr for 35 key employees. Upon completion of the Operation only four of these 35 employees actually exceeded the 3750 mr guide, and none exceeded the 5000 mr limit. 15