the lagoon vroved to b@ dangerous to personnel. Salt spray and water made maintenance of electrical equioment on the rafts difficult. Both elactrical and moving mechanical parts ccerroded quickly. Only a minority of project personnel. were able to work at the raft stations without becoming seasick. Only two of the original nine raft stations sampled successfully dwring Shot 1. All raft instrumentation recover~ able after Shot 1 was removed from the rafts and used at land stations. Since no samples were obtained from predicted base surge region of any CASTLE shot, none of the desired information about the charac- teristics and significance of the radioactive debris distributed by base surge phenomena was obtainsd. 207 RECOVERY AND SHIPMENT OF SAMPLES Recovery was carried out on the fourth, fifth, and ninth day after Shot 1, the first day after Shot 2, the first and second day after Shots 3 and 4, and the first day after Shot 6. A two-man team used a 10-passenger heliccpter to recover samples from the land stations, A secon two-man team used an LCM to recover samples from the raft stations after Shot 1. The recovery teams removed the spider assemblies from the IFC's, placed them in dust-tight boxes, and moved them tc the packing area, All locations available for packaging samplss were somewhat windy and usually in contaminated areas, Packing was done on an open barge nezr Nan after Shot 1, in a Tare tent after Shot 2, ina Nan tent after Shot 3, on Oboe, in the reer of a closed truck turned on its side after Shot 4, and in a tent at Elmer after Shot 6. were removed from the trays and capped. The jars The trays were surveyed where possible, and a few samples salected for decay measurements at the Project 2.6b Elmer laboratory. Plastic "snap-on" caps were put on the glass cups, and the trays were sealed with aluminum foil. The trays and jars were returned to Army Chemical Center, Maryland by a special sample return plane which usually left Eniwetok one or two days after recovery was completed. 20