OFFICIAL USE ONLY Frank Cluff 5. 3 Tisposal inside the reef would make scrap removal operations less weather and wine dependent since trips into open water ~_an@ possibly inte rough seas would not be seeded. 6. The identification of metal scrap containing induced radic- activity and requiring dispusal must ve mde under field concitiong using portable raciation detection instruments anc in most cases in the presence of an eievated shove ground game rediation field. The identificetion of hot spots in soil wis take place under siniler circumatances. with these factors in wind it is suggested that the following guicelines be applied: 1. <A careful search ehould be made for all contaminated scrap that may be collectable by the returning natives. Serap metal containing inéuced radioactivity and showing contact readings measurable atove local background ghoulé be collected far disposal. The need for removal of other materials such as soil frem any hot spots conteining plutonius or other rediceuclides will be a matter for case-by-case determinations in the field with recamendstions made by the ARC Radiological Safety Advisar. =. Dtepossl of metal acrap conteining rediceetivity in water having a depth of about 150 to 200 feet will make these asterials un aysiiable to the native population. These depths are approxi- mately equivelent to the c¢eeper parts af the lagoon. 3. A Gisposal eite for each of the three nee teat arees, as described on pege 1, containing the contaminated scrap may be chosen inside or outside the reef with a minizem distance of one wile to the nearest isian’g or islet. A record of positions should be msde —an@ ineloded in final reports. If any merkers are used they should be removed at the en! af cleanup operations. 4, Considering the possibility of future salvage cf ahips, metal scrap containing induced radimctivity is not to be placed within the prohibited eres located in the east ené of the lagoon (refer to HE. 0. 6032 perlished ty U. 5. Naval Ocesncerprhic Office). Exeept when collected by these authorized to do ec, no saiyles of metals comtaining induced radicectivity are to de retained or transportec from Bikini Atoll. . 2