TABLE V Rocky Flats Exposure* Number of Cases Total Lung Burden (uCi) 1 0.272 0.033 137,000 1 0.160 0.0193 79,000 1 Q.111 0.013 54,000 3 0.064 0.008 33,000 0.024 0.003 12,500 19 ; Hot Particles Luna Burden (uCi) J | Number of Hot Particles * Mann and Kirchner presented the lung burdens as number of MPLB. These have been converted to uCi in column two using MPLB=0.016 uCi. (For the groups with 3 and 19 cases, The hot we selected the midpoint of the reported range.) particie burden in colum chree was estimated by multiplyina the tetal burden by 0.17, particles above’ 0.6 u, the fraction of and 0.70, the activity on the fraction of initial deposited activity that was involved in long term retention in the lung. Based on particle size data reported by Mann and Kirchner, we estimate the average hot particle activity is ancut 0.24 pCi. lie munbercs ci not particles in the last column were obtained by dividing the hot particle burdens in column three by the average hot particle activity (0.24 pCi). r Allowing a risk of cancer equal to 1/2000 per hot particle, suggests that the individuals whose exposures are presented in Table V stand a very high chance of developing lung cancer -- the probability is essentially unity. In this respect, it is significant to note that in the experiments w . “H a eae ‘ ‘ m : 4 aa . : ' slip ee . et ee 1, : ha -f “— o oa wen . eee t ft. . me - vey elegy ot woe ae ee YY ofS . a, ee ate nd : he, OA Yee cet ata SOT a wits 7 oT id a- Seal TL tye r ™ ’ * ey at yt rem AT a 7 . my tt 4 ; . ‘ 7, Whyte!