RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL 302 b. Considering the physical and ecological limitations to removal of transuranics from the Enewetak Atoli, the Bair Committee recommended the foliowing cleanup criteria: (1) All one-quarter or one-half hectare areas on residential islands should be cleaned unless the average concentration in surface (0-3 cm) soil does not exceed 40 pCi/g (with 70 percent (2) confidence}. That is, each one-quarter or one-half hectare area should be cleaned if the average concentration plus one-half standard deviation (for the unit area) exceeds 40 pCi/g. From the information then available and being used for dose assessment, the Committee believed this procedure would provide a reasonable expectation that dose in the bone and lung would be commensurate with the EPA guidance. In terms of radiation dose-sparing benefit to future inhabitants, the Committee pointed out that cleanup of a standard area on a residential island was worth about four times as much as cleanup to a given level on an agricultural island and 12 times 2s much as cleanup of the same area to the same level on an island designated for food gathering. In the light of existing contamination levels and available cleanup resources, it would appear that cleanup ofall one-quarter or one-half hectare areas on residential islands according to the above criteria should receive first priority. Because the other islands may have increased use over that currently assumed, a second priority should be the cleanup of agricultural island half-hectare areas unless the average concentration for the unit does not exceed 80 pCi/g (with 70 percent confidence). A third priority should be the cleanup of food-gathering island half-hectare areas unless the average concentration for the unit does not exceed 160 pCi/g (with 70 percent confidence). If resources were exhausted, some islands might not be cleaned up, and final dose assessment might indicate that these islands would have to be quarantined. The Committee noted that the soil profile on Lujor was anomalous, Since the concentration of transuranics appeared to be uniform with depth. They believed that the possibility of effective cleanup for use as a residential or agriculture island was remote. However, the possibility of covering Lujor with the less contaminated soil from the residential islands, and perhaps from the agricultural islands, should be considered for lowering the average surface contamination levels and reducing the logistics problems of transporting the soil from the other islands to Runit. Soil Cleanup Planning The Committee listed se additional information wh estimates and cleanup cri plowing might reduce sur potential inhalation prob! uptake. 83 DOE § The DOE-ERSP chara forwarded to Field Comm while the EIS covered pl volumes to be excised un were used in updating the briefing to be given at t disregarded due to signif} The DOE characterizat it confirmed what had bee Task Group recommen islands required removal as planned by the dri-Ene None of the eight case-° other northern islands, n been characterized and fi DOE-ERSP’s estimate: four islands named in the 72,000 cubic vards. The yards. The DOE-ERSP « cubic vards to qualify reassuring to the plann previously estimated tot inclusion of al} transurar Regarding the time wu noted that the advance complex task and the development component distant, harsh Enewetak relatively quickly—was q been delayed, but this contaminated debris cle: involving major resource advised, no serious hari