1.1 This test method covers the measurement of total tritium activity in the atmosphere in concentrations greater than 74 mBq/m (2 pCi/m ). This test method covers sample collection, preparation, and radiometric assay of the sample.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.