68Contamination of premises by radioactivity

#### 68 Contamination of premises by radioactivity 68 Contamination of premises by radioactivity > > (1) For the Act, section 21(4), the following levels of radioactivity are prescribed— > > > > > (a) for premises where one radionuclide is causing the radioactivity—100 times the exempt activity specified for the radionuclide in the Safety Standards, Table I.1, > > > > > (b) for premises where a mixture of two or more radionuclides are causing the radioactivity—the sum of the activity ratios of the radionuclides is 100. > > > (2) In this section— > > > > activity ratio, of a radionuclide, is the actual activity for the radionuclide divided by the exempt activity specified for the radionuclide in the Safety Standards, Table I.1. > > > > Safety Standards means the Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards, General Safety Requirements Part 3, published by the International Atomic Energy Agency, as in force from time to time.