ar otlér personnel were established by the Commander, Joint Task Force SEVEN. As the test series progressed, additional events were introduced and the personnel exposures mounted rapidly toward the established maximum, Not only: the aircrews but the aircraft maintenance personnel and the crews who recovered and packaged the collected samples were approaching their expos- ure limits. To alleviate this problem, the Commander, Task Group 7.) requested and was granted permission to extend the maximum exposure limit of the maintenance and sample recovery crews from five (5) rem to eight (8) rem and ten (10) rem respectively. No extension beyond ten (10) rem was authorized; so additional cloud sampling aircrews were obtained and selected flying personnel at Eniwetok were trained to perform the duties of cloud sample observers. By careful scheduling of all cloud sampling aircrews and support personnel it was possible to complete the operation with no serious cases of over exposure, (See Figure 22 , Chapter 86, "Exposure of TAU Nuclear and Maintenance Personnel to Ionizing Radiation" and Figure 5, Chapter 4, "Cloud Sampler Aircrew Exposure",) in support of the rapid delivery of radioactive cloud samples to laboratories in the Zone of the Interior, military couriers were instructed and briefed by the Task Group 7.) Nuclear Research Officer, who also monitored the loading and securing of the samples aboard the return aircraft. He also established an isolation area within each of the sample return aircraft to insure the safety of the passengers and crew. This isolation area was established by marking the cargo floor of the aircraft at a location between the cloud samples and the passengers where the radiation intensity was ten (10) milliroentgens per hour. Personnel remaining outside this line could expect to receive no more than one (1) weeks tolerance dose of 136 APMLLHO yt ak i