26 TABLE 3 #2 RADIONUCLIDE SOIL PROFILES~ibi RONGELAP ISLAND: Average I Cesium-137 Depth (cm) 1978 1987 1978 0-5 0-1o 15 1987 10.1(7) 5.4 10-20 activity 1.2(1) for dry soil (pCl/%) I Plutonium -239,-240 Strontium -90 ] 1978 9 5-1o 10-15 specific 1978 1987 mericium -241 1987 1978 1987 1.7(3) 1.0 6.9 3.2 , 7.7 2.0 .78 6.7 1.1 .41 15-25 2.6 4.5 .35 .18 25-40 1.8 2.1 .07 .08 0-40 5.0 4.6 .89 .35 Number profiles of 27 17 18 20 I ●I The bt The samples 1978 profiles are from Robison 1987 values are from Boikat is given in parentheses. et al, 1982, Part 4, and Paretzke (Note 8). They are corrected back Appendix B. The number to 1978. of