A dry smear taken from an area of about 100 cm 2 is acceptable to indicate levels of removable contamination. Averaging is also acceptable over 100 cm 2 for skin or, for the hands, over the whole area of the hand, nominally 300 cm 2 . Allowable levels of surface contamination on equipment are based on the radionuclide and the size of the surface area contaminated.
Separate limits exist for average, maximum and removable levels of contamination.
Measurements of average contaminant should not be averaged over more than 1 m 2 . For objects of less surface area, the average should be derived for each such object. The maximum contamination level applied to an area of not more than 100 cm 2 . 10,000 mCi 10,000 Ci Baseline, closeout, and special circumstance bioassays may also be requested of an individual.