Column Column
Part of body Column II III
I (rem) (rem) (rem)------------------------------------------------------------------------Whole body; head and trunk; active blood- 0.005 0.5 15
forming organs; gonads; or lens of eye......Hands and forearms; feet and ankles; 0.075 7.5 200
localized areas of skin averaged over areas
no larger than 1 square centimeter..........Other organs................................. 0.015 1.5 50------------------------------------------------------------------------ [34 FR 6654, Apr. 18, 1969]