COLOR CODING USED ON MAPS The color coding used on the maps in “The Meaning of Radiation for Those Atolls in the Northern Part of the Marshall Islands that Were Survey in 1978” was based on the concentration of radionuclides (mainly Cs and Sr) in the top 5 cm of soil. These values were taken from a preliminary draft of the report The following by Dr. Bill Robison, Lawrence Livermore National Laboratory. The color code used are the soil values and the color codes for Rongelap. was: (pCi/g dry wt) Cs + Sr Pu + Am > 100 20-100 2-20 <1 4 (darkest intensity color) 3 2 1 (lighted intensity color) > 50 15-50 1-15 . <1 The values for Rongelap follow: Boruk Namen Eneaetok Lomwi 1al Ekoj Rongelap Menu Arbar Naen Cs — Sr — 36 40 17 46 9.5 95 46 6.9 45 3; 170 ;? :: 150 - Cs + Sr Code —— ;: 16.5 131 216 21.9 116 : 2 4 2:: : 4 2 4 Pu 7.2 14 1: 14.91 3.2 14 2; Am — 2.6 6.7 .71 5 6.5 ;.8 3.8 13 PU + Am Code 2;:; 2.71 24 21.41 : 1::; 7.8 42 : 2 3 2 3 3