o GR *Yurndings of Martell and others tnat not particles may very well " “pe a causative factor in a number of other disorders. Prrendices II and III. See The DEIS deals cnly with inhalation risk, yet Americium is known to present a risk for the liver, spleen © i pene of man through take-up from the gestreintestinal tract. (Martell, Personal Communication.) Concerning the adequacy of the radiological survey with respect to internal alpha emitters, Dr. Martell had this to say: ty It is noted that the Survey results for the Enewetak Lagoon sediments show an average of 463 mCi 239+240 Pu/km?, 172 mCi 241 am/km2 and 586 mCi Table 3-11, p 3-75, DEIS Volume I). the 241 50 Sr/km 5 In addition, Am concentrations range up to 8.2 pCi/g averaged , 241 239 over the top 15 cm depin of soils, with Am/ Pu Yatios varying widely and ranging up to 3.5 (NVO-140° Vol. 1, p 507). Due to further radicactive decay of 241 241. Pu, the Ain activity concentrations can be expected to double over the next 50 years. t In addition, densely , . vegetated soils on each island show the highest radioactivity concentrations. The DEIS limits consideration of 239+240 Pu to inhalation risks. However significant uptake of Pu een , from the gastrointestinal tract has been observed in young mammals and Similar uptake may occur in young children. In addition the uptake of americium in soils by vegetation is Substantially higher than plutonium Ms Sen hat a! h