The tvo ucthods presented are the "resuspension-factor" approach and the : Itai : RUSS" 2UaGiIN® approaca, aye : cola concentrations of 2395 . ' be Tu tuat would be associated with tie standard for 239pu in air (0.04 pCci/n3) by the two mMeatuols are: oa ef eas sage ADOTdel pb SMALL A wecent tapert, reyes . 4y- ~ ‘ Oreo ye eo © © © © © « ocd tic rim Stincurl 7 Le 7 nr _ 6 © or oye 339 ci/ 3 peas “latciuitm in toils LA=3433-15, presents recommendations derived from estimates of exposure through inhalation considering the concentration of *39Pu in the very top surface soil. The following values were recommended: 409 nCi/z - For all particle sizes provided no more than 290 oCi/- in< 109/am size fraction. A revised Maximum Permissible Concentration, (PC, of 9.3 pCi/m? for individuals was used in these determinations. large area contamination. The estimates apply to Levels several times larger could be permitted for localized deposition. The Task Group recognizes that the islands of [newetak Atoll are small and that the areas of highest 239Pu in soil on these islands are smaller still. On the other hand the people live close to the soil. It is also recognized that experts are not in agreement as to the critical organ for inhaled plutoniun, whether to use an average dose for this organ, or the —_—_—oOoT —— a — x ~~. model to be used to predict Jose.V tathoinrerest-ef seein —acenscruative. yet. flexible. anmroach to cansi i crt bac: $44-411 -