airstrip and at the personnel pier on Parry Island. Aircraft decontamination was accomplished by the preventative measureof lining interior surfaces with paper that was subsequently removed and by the use of commercial-type vacuum cleaners. Decontamination of vehicular and other equipment was accomplished in a designated area north of the personnel pier. Methods included lining with paper that was subsequently removed, high-pressure fresh-water hosing and scrubbing with soap on local “hot spots,” and subsequent removalto the storage area north of the Radiological Safety Building if results showed that contamination was still above the permissible limits. Working personnel were equipped with the necessary protective clothing. The source of high-pressure water jets was truck-mounted M3A2 300-gal power-driven decontaminating apparatus with a standby electrically operated centrifugal suction-discharge pump. Personnel decontamination was accomplished using the change-room facilities in the south end of the Radiological Safety Building. Personnel who were not completely decontaminated returned to the showers. Localized hot spots which were found were removed by using hand ' brushes and soap. Various chemical and complexing-agent solutions were available to facilitate personnel decontamination, but their use was not necessary. Contaminated clothing was allowed to lose its activity by decay and was then cleansed by laundry or brushing procedures as applicable. Before each mission, personnel in the party were briefed in the procedures they were expected to follow. No personnel of TG 132.1 were found to be seriously contaminated. 3.14.3.4 Administration and Supply Group This group operated beth afloat and ashore upon re-entry. Its functions were standard with the exception of the handling of devices peculiar to radiological-safety operations,i.e., instrument issue, etc. The supply group supervised the issuance of protective clothing and , equipment, instruments, etc. The administrative portion of this group handled all the correspondence and necessary administrative details resulting from the operational activities of TU 7. 3.14.3.5 Information Center This group operated both afloat and ashore and correlated, as required, all information obtained by the other groups into an over-all picture of the radiological security of the operation. Daily situation maps were maintained, showing various radiation levels at all available sites. Records of sample assays were kept and utilized as required. 3.14.3.6 Special Projects One man was available on call for special monitoring in connection with the special radioactivity problems of the Mike device. 3.14.4 General Comments Throughout the operational activities, assignments were rotated as much as possible in order to provide experience for personnel in all phases of the operation. Over-all efficiency seemed to be excellent. Supplies, equipment, and personnel were adequate to accomplish the assigned mission. 3.15 , CLASSIFICATION ACTIVITIES The mission of the Classification Officer of TG 132.1 included the making of classification decisions as required during construction, test planning, test operations, roll-up, and test reporting. The Classification Officer advised the Commander, TG 132.1, on problems involving security of information. This office advised the J-2 Section on classification of areas and activities so that appropriate safeguards could be provided. Apparent security breaches were reviewed by the Classification Section in an advisory capacity to the JTF 132 J-2 Section, AEC 43