Three people were directly engaged in particle sample remofals. A fourth person served as an overall supervisor to ensure complifnce with sample removal procedures. A minimum distance of 25 feet (8 m@ters) was used as a criterion for separation of sample removal equipment] from the hot sample pod, as well as for personnel while not removing safples. Per- son No. 1 advanced to the pod, cut the filter-retaining wire (figure 27), then returned to his initial position, still holding long-handJed tongs. Person No. 2 advanced with a 9-foot (3-meter) sample removal pole, sequred the (Figure 28), and deposited it in the shielded "cave," og (Figure 29). enclosure Person No. 1 stood by to help No. 2 by using the Jlong~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 holdey 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." ie 7 10, EN Cepr : . . ed a 70 oe = Zo aT ie ¥ . . : Person No. clear of # put the en ne 7 - 7" a . ~ nat 3 oe Tr ane ree. rh Ah etd ~—engg2S . 2 stood “well tome 2 en ee ae Ta gree we ee Bek Ag No. 3 . OS Et an ro gde EO ey Seeae eR . . eRe tee RT One oD = my ~ fare”? te ae Oe 8! ot A ee ” -more ~ eb we : we =hee te oe ane ne.t ee “chs “— Ai gece: fas a oe Figure 27. .. fa wots & * ada ss film f. ® 74 wom motes TRAST oO vr o "05 ~ . ~~ nee “Tt " aa- gat ~ <- - - . . ee A geeie H Cutting filter paper retaining wire in left tank] 141 CASTLE.