attempt was made to search for structures not shown on as-built draw- ings. Thus, although H&N-1348 lists about 400 items of debris for the ten islands, the AEC (in report NVO-140) reports radiation measurements for only half of them (about 190 items). 3. The AEC did not establish any criteria for designating debris as contaminated. NVO-140 merely reports a single gamma exposure rate (presumably the highest) for the general area of an item of debris. Thus, for example, a "scattered junkpile"” on Alice is given a value of 120mR/h and without any indication of the quantity of junk which has that exposure rate or whether any of the junk should be labeled as contaminated or noncontaminated. Cleanup will make the differentiation fr by comparison against specific criteria. B. CRITERIA l. No material is totally devoid of radioactivity. However, not every material should be consicered as a radioactive pollutant worthy of decontamination. Some level of radioactivity below which a material should not be regarded as "contaminated" is proper. This is par- ticularly appropriate at Enewetak since the general background to remain after Cleanup will in many places be greater than the radiation level from any individual item. No Federal or International rules and regula- tions are directly suitable for Cleanup, so this Radiological Plan will promulgate criteria for Cleanup. 2. The AEC Task Group and the Cleanup EIS note that materials which might be used by people in place or removed for use elsewhere are the ones of concern. Since there are post-Cleanup constraints on use of Be r r ‘ C r b & b KF ¥ & . BR b- B , KE r 10