18 TABLE 3 #2 RONGELAP ISLAND: RADIONUCLIDE SOIL PROFILES® / Average specific activity for dry soil (pci/q) Depth Cesiun-137 (cm) 1978 1987 1978 0-5 0-10 15 1987 -90 1978 1987 Plutonius -239,-240 1978 1987 beers -241 1974 1987 6.9 3.2 9 7.7 2.0 78 5.4 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 5-10 10-15 10-20 Number of profiles 27 10.6(7)| Strontius 20 18 4 1.7(3) L7 a/ fhe 1978 profiles are from Robison et al, 1982, Part 4, Appebdix B. b/ The 1987 values are from Boikat and Paretzke (Note 8). The fiumber of samples is given in parentheses. They are corrected back to 1978.