Three people were directly engaged in particle sample removals. A fourth person served as an overall supervisor to ensure compliance with sample removal procedures. A minimum distance of 25 feet (8 meters) was used as a criterion for separation of sample removal equipment from the hot sample pod, as well as for personnel while not removing samples. Per- son No. 1 advanced to the pod, cut the filter-retaining wire (Figure 27), then returned to his initial position, still holding long-handled tongs. Person No. 2 advanced with a 9-foot (3-meter) removal pole, secured the sample (Figure 28), and deposited it in the shielded "cave," or enclosure (Figure 29). Person No. 1 stood by to help No. 2 by using the long-handled tongs if the sample should fall to the ground. After the sample was de- posited in the cave, he returned the tongs to the tool trailer and secured a hook tool. He then joined No. 2 and opened the sample holder for No. 3 to insert a rolling tool over the filter paper (Figure 30). rolled the filter paper (Figure 31), No. 1 and No. the cave, aircraft, and other radiation sources." oo As No. 3 2 stood “well clear of Person No. 3 put the ROS ago --~. me ee ee Figure 27. Cutting filter paper retaining wire in left tank, CASTLE. 141