WAC 296-307-63805. Conduct hearing protection audits at least quarterly

(1) The employer must conduct audits at least quarterly to provide a representative assessment of the workplace. (a) The assessment is representative if it: (i) Covers all processes and work activities in the employer's business at full production levels; and (ii) Covers all employees present on the audit day. (b) If the business is mobile or involves variable processes, auditing may need to be repeated more often than quarterly; (c) Auditing does not need to be repeated more than monthly as long as a reasonable effort is made to cover: (i) The activities with greatest exposure; and (ii) As many employees as possible. (2) The employer must assess exposures and hearing protection for the full shift for each employee covered at the time of the audit.