CHAPTER VII, SECTION 2 dismantling of all facilities. Figure 7-7 shows the protection provided for the traveling crane and associated equipment in Station 60. The entire roll-up was completed in the time allowed. rather than temporarily abandoned and recovered later as originally planned. The major portion of the post-Yankee roll-up consisted of removing equipment from Stations 70 and NA-500, Nan; Station 1342 and 1550, George; and removing the marine craft WS from Bikini Atoll. The removal of mooring gear was also an important part of the roll-up. eed Rolling stock and equipment of both H&N and the Users was shipped from the Bikini area by Navy craft to Eniwetok for decontamination. However, since the existing Rad-Safe facilities at Elmer were taxed beyond their capacity, especially in regard to heavy equipment, a new fenced-in wash-down area approximately 150 ft. x 200 ft. was provided on the ocean-side of the island east of the CMR Area. Fresh and salt water lines were laid and a 50 ft. x 50 ft. concrete slab was poured near the beach (within the fenced area) for proper water run-off. A boiler was installed to furnish the live steam used to clean off engine and chassis grease; salt water was used for washing down exteriors and interiors of equipment. As the equipment was brought into the area from Bikini, decontami- nating was begun immediately, and at times many H&N employees were usedto accomplish the decontamination program and also to allow the various Task Groups to make preparations for an early return of their equipment to the Z.1. It was also the responsibility of the Contractor to maintain, repair, and service various Task Groups equipment and vehicles while at Figure 7-7. Station 60 Protection Provided for Equipment Jobsite and also to assist in their preparation for return to Z. 1. (Figure 7-8). Desicants were scattered throughout scien- The USNS Ainsworth was used in lieu of the USS Curtiss as a personnel housing craft during the post-Yankee roll-up. This substitution of vessels was deemed more practical to both the User and Contractorstaff. During the roll-up period, H&N coordinated their needs for transportation to Bikini Atoll with the requirements of the various Scientific Groups in order to take advantage of whatever facilities were scheduled for use. The vessels utilized usually carried one or more DUKW which enabled the men to visit any of the islands within the Atoll. The majority of the equipment from the Scientific Stations at Bikini Atoll was removed by 3 May, prior to test Yankee. The final equip- ment roll-up started only three days after the execution of the Yankee event on 8 May. The post-test roll-up in the Bikini Atoll area was accomplished expeditiously despite very adverse working conditions. Much of the equipment was from areas considered radioactively contaminated, but because of prompt action this equipment was salvaged immediately Page 7-8 tific buildings and these buildings were then closed and sealed with heavy masking paper. Eleven DUKWs, seven M-boats, five LCUs and two barges were removed from Bikini Atoll during the final roll-up. These vessels were loaded with recovered equipment and were transported aboard the LSD Belle Grove to Elmer; the initial trip was on 8 May 1954. The same procedure was followed with other marine craft until 11 May, when the last of the equipment was removed and the roll-up at Bikini Atoll was considered complete. At 1015 hours on 12 May, the LSD Belle Grove arrived at Elmer with the last load of equipment, after having been used for three successive trips between Bikini and Eniwetok Atolls during this period. In compliance with an additional part of the roll-up plans, an LCU was dispatched to Rongerik on 12 May via an LSD Navy Craft in order to dismantle and remove the equip- ment from a weather station located in Rongerik Atoll. With the return of this craft, all equip- ment involved in the post-Yankee roll-up had been removed to Elmer.