C @: in land areas for residential usc, specifying thet 238 . Pu levels shall not exceed 2 dpm (0.91 pCi) gram of surfac2 soil 1 cm depth of soil). (i.e., per averaged over the top It is noteworthy that the mee VD . eRe Sh AEC hasmee net eScanlished that , -- 4. 5 + 2 Ff this standard is unéuly . ok consérvative and it is not apparent that the AEC tp et | Sr pom be cy has requested the ICRP or NCRP to make specific Ope few recommendations with respect to standards for Pu in ; soils applicable to chronic exposure to the general pe glee pubiic, including children. rie ~ i . I note that the DEIS recommends no remedial action for soils containing Pu/g, « 40 pci or averaged over the top 15 cm depth. « 88 avn This is much morethan44tines the Colorado interim standard (2 dpm per g in the top 1 cm) because for most Enewetak soils the top cm contains substantially higher levels of Pu per gram than the 15 cm depth average. Thus, for example, at location 101 on Pearl, the top 1 cm depth shows 400 pci Pu/g, whereas the average over 15 cm depth is about 60. Thus the recommended standard for Enewetak is about 100 to several hundred times that adopted in Colorado. There are recent research developments which are expected to lead to reductions in acceptable organ burdens of Pu in man by a factor of 100 to 1000 or more. In my opinion it is likely that a 16 TRE EMETN IT Mer ah meet la AeA Trey gle ae Pb wa tat . eee BE wpe “ wh abt Re Fb oat ‘ . er ‘