5.5.4.2 Cleanup Actions. up the atoll: The following actions would be taken to clean @ Physical hazards would be removed from all islands. e Obstructions to development of habitations and agriculture would be removed. t . e@ e b Radioactive scrap would be removed from all islands in the atoll. Boken, Lujor, and Runit plutonium concentrations greater than 400 pCi/g would be excised and all other concentrations between 400 and 40 pCi/g would be dealt with on an individual basis. Concentrations of less than 40 pCi/g would not be disturbed. Cleanup of Pu is expected to be performed iteratively until a sufficiently low concentration level is attained. Some 79,000 cu yds of soil would be involved in this removal. e Plutonium would be removed from the three burial crypts on % Aomon. - ama pmtormoushite @ Unsalvable nonradioactive material would be disposed of by dumping in the lagoon at selected locations for forming artificial reefs. @ Radioactive materials would be disposed of as discussed in Section 5.4.3.2.3, namely by containment in Cactus and, if necessary, Lacrosse craters on Lujor. 5.5.4.3 Conclusions. Case 3, by virtue of the fact that it requires removal of only the most seriously contaminated materials, is less expensive than succeeding Cases 4 and 5. Although this case recommends that Enjebi not be utilized for habitation, it does impose far less stringent ' limitations on interisland visitations and the growing of commercial crops. With respect to the latter, it provides for the clearance of obstructions which would deny use of some of the land. Case 3 also provides for the removal of contaminated scrap to negate the possibility of any reaching the world's markets. Although Case 3 is composed of all actions described in Case 2, it also provides for further actions in establishing and maintaining radiological safeguards. 5-23