eOmentT Frank Cluff 3 5. Disposal inside the reef would make scrap removal operations 6. The identification of metal scrap eontaining induced radio- less weather and wind dependent since trips into open water and possibly into rough seas would not be needed. activity ané requiring disposal must be made under field conGitions using portable radiation detection instmments anc in most cases in the presence of an elevated above ground gauma rediation field. The identification of hot spots in soil wilt take place under siniler circumstances. With these factors in mind it is suggested that the following guidelines be applied: i. <A careful search should be meade for all contaminated scrap that may ve collectable by the returning natives. Scrap metal con- taining infuced radioactivity ani shoving contact readings weasurable above locel background should be collected for Aisposal. The need for removal of other materials such as soil from any hot spots containing plutonium or other radionuclides will be o matter for case-by-case determinations in the field with recommendations meade by the AEC Radiological Sefety Advisor. 2. Disposal of metal serap containing radioactivity in water having s depth of about 150 to 200 feet will make these materials unavailable to the native population. These depths are aprroximately equivalent to the deeper parts of the lagoon. 3. A G@isposal site for eech of the three near test areas, as described bh. Considering the possibility of future salvage of ships, metal on page 1, containing the contaminated scrap may be chosen inside or outside the reef with a minimm distance of one mile to the nearest island or isiet. A record of positions should be made ané included in final reports. If any markers are used they should be removed at the end of cleanup operations. screp containing induced radioactivity is not to be placed within the prohibited arec located in the east end of the lagoon (refer to H. 0. 6032 published by U. 8. Naval Oceanographic Office). 5. Except when collected by those suthorized to do so, no samples of metals containing induced radioactivity are to be retained or transported from Bikini Atoll. Bro K-723 6° pon? VETTE BE ba: 7 Aya Y uf.