CRITERIA Rather than establish firm, restrictive criteria for the removal of radio- active artifacts, or the elimination of high background* areas from the islands of the atoll, each situation was viewed in terms of the potential exposure versus benefit. useful value was removed. All debris or artifacts having little or no All scrap metal or concrete with contact readings greater than 100 micro-Roentgen per hour (uR/hr) was treated as radioactive waste and buried at sea. Three specific locations were selected for this burial (Figure 1). In some cases, scrap reading less than 100 uR/hr was buried on Jand together with non-radioactive debris. This was only done on islands where areas exhibiting background levels in excess of 100 uR/hr were found. No radioactive debris at any level of activity was buried on the islands of Bikini, Eneu, or Aerokoj. The exterior of several bunkers, located on the northern complex (Iroij, Odrik, Lomilik, and Aomen) and Nam, exhibited-levels of radioactivity up to 7,000 yRad/hr (8 + y) at contact. 200 uR/hr maximum. The net gamma levels were The levels inside the bunkers were less than 10 pR/hr, however. Since the potential for personnel exposure was negligible, and the bunkers were desired as typhoon shelters and storage buildings by the natives, the larger bunkers were left intact. Several instances of high background levels, greater than 200 yR/hr, due to soil contamination were also encountered. It was the consensus that attempting to reduce these levels by removing the top layer of soil would destroy the limited agricultural capability of the area, therefore, most such areas were left essentially undisturbed. *The term "background" as used in this text denotes the radiation levels at the time of survey and includes that portion resulting from testing operations as well as from natural sources. Natural background levels in this part of the world result primarily from Cosmic rays and are aenerally less mm ~O O 0 | Lad than 5 uR/hr.