312.43. Sampling and analysis: Sampling and analysis of compressed air, pure gases and gas mixtures used for diving must be carried out in accordance with Clause 4.9 and Clauses 4.11.2 to 4.11.5 of CAN/CSA Standard Z275.2-11, Occupational Safety Code for Diving Operations. The results of those analyses must be entered by the employer in a register that must be kept for a period of at least 5 years.
O.C. 425-2010, s. 3; O.C. 1104-2015, s. 5.