OAR 437-007-0335: Hearing Protection

(1) Personnel must be protected from the effects of noise exposures in accordance with OAR chapter 437, division 2/G, Occupational Health and Environmental Control. (2) Personnel must wear hearing protection unless monitored under typical work conditions and found to be exposed to a noise level of less than an 8-hour time-weighted average (TWA) of 85 db when: (a) Operating chain saws, other noise producing equipment, or machines. (b) Working on landings.