-51- Ratio of observed activity to MPC (water)*# Ryt06. Sample** pnt06 y92 wn54 p55 pe59 C057 C058 969 765 Clam kidney Belle Is. 9-22-56 0.05 0.1 12. 140. 12. 9.7 44.7 .65 --- --- --- 0.42 0.32 --- 1 .2 £03 80.08 9-23-56 --- --- 0.32 3.2 --- 09 14 .03 0.13 Fish liver Belle Is. 5 and 6, 54 --- --- 0.08 5.3 --- 005 --- .008 0.01 Fish liver homogenate Fox Is. 9-23-56 Bonito liver Fox Is. In the clam kidney the levels of Mn>% Fe--, Fe>?, Coe! and Co°8 are greater than the maximum permissible concentration in water for human consumption. however, In an average of the fish livers, only the level of Fe? is greater than the MPC. The levels of activity in these samples, however, are un- doubtedly greater than the average for the animals of the Pacific Proving Ground, since the samples were collected in regions subjected to greater than average amounts of contamination. The gen- eral levels of non-fission product radioisotopes in the marine organisms and the variation in radioactivity content between indi- * MPC/m1 Hp0 for Mn>4=1,3x1973 uc (Seymour, 1957), Fe >5=4x107, Pe 921x107 uc, Cool=7.2x1073, C05821,5x1073, Co%2x10-2, Zn°5e6x1272 (Handbook-52) #*# See appendix table

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