handling of collected contaminated materials. A Public Health Service group, which is now part of the Enviromental Protection Agency, EPA, provided radiological assistance for cleanup of Bikini Atoll. Similar support should be sought from EPA for Enewetak Cleanup. — Decontamination of YVONNE is seen as an iterative process, namely, removal of soil, monitoring of radioactivity levels, and removal of more soil. This amounts to a search for the higher plutonium levels in soil with removal according to the guidance provided. The objectives of the cleanup are two: (1) Recovery of the pieces of plutonium that have been observed on or near the island surface. Some contain milligram quantities of plutonium metal and are easily detected with field survey instruments such as the FIDLER. (2) Recovery of plutonium contaminated soil. To a first approximation, the location of the zones of higher Pu ccncentrations are shown in the survey profile samples. Recovery of plutonium in soil at concentrations greater than 400 pCi/g 239,240 Pu at any depth these levels are found. 9 The justification is that plutonium at some depth may one day be at the surface. Also, recovery of contaminated soil sufficient to reduce surface levels te a value well below 40 pCi/g 239,240), The justification is to keep air concentrations of resuspended plutonium to levels well within national and international Standards. After soil removal, all areas should be resurveyed to ensure no pieces or hot spots of plutonium remain. -28-