• Conduct audits at least quarterly to provide a representative assessment of your workplace

– The assessment is representative if it:

■ Covers all processes and work activities in your business at full production levels

■ Covers all employees present on the audit day.

– If your business is mobile or involves variable processes, auditing may need to be repeated more often than quarterly

– Auditing does not need to be repeated more than monthly as long as a reasonable effort is made to cover:

■ The activities with greatest exposure

■ As many employees as possible.

• Assess exposures and hearing protection for the full shift for each employee covered at the time of the audit.