TABLE 7 POSSIBLE SOURCES OF THE RaD CONTENT OF THE HUMAN SKELETON source Rae26 jn Bones Rn222 Dissolved in Body (Equivalent to 50 1 of air at 3.0 po Rn222/1) A 0.004 0.007 Potable Water (Maximum Observed, 0.4 pc RaD/1) 0.022 RaD from Short-Lived Activities (Rn222 daughters) 9.004 Food 0.066 Total 0.176 Total (less Rn222 in body and potable water) 0.148 Measursu RaD Concentration (Average) 0.145 + 0.020 RaD in Atmosphere (0.03 pc RaDIl) " Contribution to RaD Concentration (pe/g ash) 0.073