ENVIRONMENTAL o HALF-LIFE OF 137cs (cONTINUED) Significance 1.) Can greatly alter the predicted doses over 30, 50, or 70 y and the maximum annual predicted dose. 2.) Could alter the scope of cleanup on some islands and eliminate others from consideration. 3.) ~ This T1/2 effect would be applicable to all three atolls called out in the compact. o Time-lines and Milestones - T1/2 based on Enewetak trees T1/2 based on Rongelap historical T1/2 based on Bikini trees - FY 1987 sites - FY 1987 - FY 1988-89