Contamination
Contamination means the presence of a radioactive substance on a surface in quantities in excess of 0.4 Bq/cm 2 for beta and gamma emitters and low toxicity alpha emitters or 0.04 Bq/cm 2 for all other alpha emitters. There are two categories of contamination:
(1) Fixed contamination means contamination that cannot be removed from a surface during normal conditions of transport.
(2) Non-fixed contamination means contamination that can be removed from a surface during normal conditions of transport.