3.3 OPERATIONS 3.3.1 Procedure The general scheme for preparation of the two-phase collectors was as follows: 1, The rainedisplacement reservoir was filled with solution 3. After insertion of the cork and closure of the cover, the and adjusted so that addition of 1 drop of water to the funnel caused 1 drop of solution to flow into the collector, 2, The eppreprists volume of chlercbenseme<carbon tetrachlerd mixture was adjed together with the bag of desiccant, and the liquid level waa measured, other reservoir was filled, (Fig. 3.4) Recovery was made in cenjunction with the recovery operation of Project 2.5b. The general scheme for the recovery of the total fall-~ owt samnles was ae follouss 1. 2. Upon arrival at the station, the activity was recorded. The cover of the two-phase collector was opened, abnormal- ities inside the collector were noted, and the liquid level was measured, 3. The valve on the side of the collector was opened, and all the aqueous phase collected in a suitable container, lh. After the aqueous phase was drawn off, the chlorobenzene phase along with the solid fallout was collected through the quick opening valve at the bottom of the collector (Fig. 3.5). 3.3.2.1 Shot 1 The Shot 1 device was detonated on the reef of Bikini Atoll near. Charlie at 0645 local time, 1 March 1954, Samples were recovered . by helicopter on Dry and D+t5 and returned to Parry Island by destroyer, Analysis waa begun on D+6, Only tie How sample was suitable for part= Aicle size work, Samples from Victor and Fox weré used for comparison of aqueous and solid phases, A crater sample was obtained from Task Unit 7. - 3.3.2.2 Shot 2 The Shot 2 device was detonated on a barge in the Shot 1 crater at 0630 local time, 27 March 1954, The two-phase collectora were not activated for this event. A ground sample from Able and iiquid from the crater were obtained from Task Unit 7. 3.3.2.3 Shot 3 The Shot 3 device was detonated on Tare at 0620 local time, 7 April 1954, Samples were recovered by helicopter on Del and returned to Parry Island by sea-going tug, Analysis as begun oa D*3, Samples were obtained from Victor and Yoke, but were quite small on 20 SECRET — RESTRICTED DATA