A total of appre stmately 765 soil, water, and food by laboratory personnel. ples were taken An arbitrary limit of 500.000 d,m per liter of water was cstablished as the tolerance level for swimming. A single film badge system was used during the ojeration, with exchanges scheduled each 60 days or when personnel returned from full radex areas. Total dosage records were kept current daily by the use of IBM equipment, which included a 704 EDPM, 526 Summary Punch, 082 Sorter, 519 Reproducer, 552 Interpreter, and 066 Data Transceiver. The Eberline FS-3 Film Badge Evaluation System, developed for JTF 7 and AEC use, was used for reading all film and automatically preparing IBM cards for the 704. The Data Transceivers were used for daily exchange of information between Bikini and Eniwetok as all data processing was done at the IBM center at Eniwetok. TU-6 assumed responsibility for personnel dosimetry on April 1, 1958 and the program was continued until August 20, 1958. During this period approximately 62,000 badges were issued to approximately 18,000 individuals. The maximum permissible dosage was established as 3.75 r for any 13-week period, 5 r for the entire operation. As of August 20, 1958, only six people exceeded the 5~r maximum permissible dose. The Eberline FS-3 Film Badge Evaluation System, in conjunction with the IBM installation, enabled the dosimetry section to operate efficiently with less than half the personnel required for previous operations. The rigid polyvinyl chloride encased film badges were highly successful because they were not affected by heat, moisture, or humidity. The ceresin wax coating on the film packet was extremely satisfactory and did not interfere with the film processing. The use of barges as zero points reduced the on-site radiological contamination significantly over previous operations and enabled the operation to proceed without delay due to excessive contamination at key locations, 4.7 WEAPON ASSEMBLY LASL. The weapon assembly group was responsible for preparation of the various devices for firing. They assembled and checked out all bomb components, installed the device at its firing site, and operated a system iortlemetering information essential to the readiness of the device for firing. The use of barges as zero sites plus the high degree of efficiency reached by the assembly personnel enabled two devices to be placed_onshot barges and fired within 24 hr. In one instance an unassembled SiETED received at the site, assembled, and fired within a 48-hr period. D e weapon assembly group functioned on every LASL shot, and, in addition, assembled the LASL-furnished primary on one Livermore shot. UCRL. Program A was responsible for the field assembly of the large devices. Each assembly team was headed by a Project Physicist and a Project Engineer thoroughly familiar with the theory, design, fabrication, and assembly of their device. Prior to shipment each device was completely trial-assembled except were used. All devices were air-shipped from Travis AFB and delivered to the shot site without incident. 128