Eluklab had been located just west of Boken, at the northernmos of the atoll. A large air-dropped device was exploded over th off Runit as the second event of the IVY series. The locationsJ extension reef just of all these pre-CASTLE detonations are Shown in Figure 10. A qualitative measure of the radiological conditions at EneWetak before CASTLE is available in the form of a joint task force TG 7h1 planning discussion held at LASL in March 1953. A LASL spokesman said at Enjebi "was still quite hot" at that time and that this should be tak into con- sideration in planning instrument placement for CASTLE (Referenbe 7). A slightly more quantitative description of the contaminatifJbn from prior tests and the subsequent work necessary to make it possitflie to work in the area is recorded in the final report for CASTLE of the se support contractor Ojwa in (Reference 5). An advance camp was to be set up on the Eleleron-to-Lojwa complex, and it was necessary to fill th Crater on Eleleron resulting from the GEORGE detonation of GREENHOUSE. e "average radiation level in this area [presumably near the crater] was per hour in December [1952]. . . . to 95 mr Some experimental work was one toward decontaminating the areas and it was found that the most satis ctory re- sults were obtained by removal of vegetation and up to 12 inch of top soil." The disposal of this contaminated layer of soil is not in Reference 5. The crater itself is a likely prospect. The discussed qrater was being filled in the spring of 1953 and by May 1953 the radiati n level was low enough that "construction forces could live ashore in camp nitely, within allowable dosage" (Reference 5, p. 2-51). indefi- Befoge this, the construction personnel had been flown from Parry to Lojwa dail , or had lived in the lagoon on an LCU equipped as a houseboat. The ac ual camp- site at Lojwa had to be scraped to a depth of about 3 inches ( cm) and backfilled with uncontaminated coral to ensure its long-term ha@bitability. The MIKE detonation was many times larger than any prior Emewetak tests, and the crater formed was probably still radioactive. however, was thickly blanketed by seawater that provided a hig) 49 he crater, degree of