Regulations Made Under Part II of the Canada Labour Code Respecting Occupational Safety and Health of Employees Employed on or in Connection with Exploration or Drilling for, or the Production, Conservation, Processing or Transportation of, Oil or Gas in Canada Lands, as Defined in the Canada Oil and Gas Act

8.4 Where the level of impulse sound in a work place exceeds 140 dB, the employer shall provide every employee entering the work place with a hearing protector that

• (a) meets the standards set out in CSA Standard Z94.2-M1984, Hearing Protectors, the English version of which is dated June 1984 and the French version of which is dated February 1985; and

• (b) reduces the peak level of impulse sound reaching the employee’s ears to 140 dB or less.