The employer shall ensure compliance with the following requirements:

1. (a) Protection against the effects of occupational noise exposure shall be provided when the sound levels exceed those shown in Table 1400.6 below. Feasible engineering or administrative controls shall be utilized to keep exposure below the allowable limit;
2. (b) When engineering or administrative controls fail to reduce the noise level to within the levels of Table 1400.2 below, personal protective equipment shall be provided and used to reduce the noise to an acceptable level.
3. (c) Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level; and

4. (d) Permissible noise exposures are designated in the following table:

   Table 1400.6 Permissible Noise Exposure.

   Sound Level

   dBA Slow

   Duration Per Day, Hours

   Response

   8

   90

   6

   92

   4

   95

   3

   97

   2

   100

   1-1/2

   102

   1

   105

   1/2

   110

   1/4 or less

   115

Source. #4118 eff 8-22-86, EXPIRED: 8-22-92 New. #6684, eff 2-4-98, EXPIRED: 2-4-06 New. #8606, INTERIM, eff 4-12-06, EXPIRED: 10-09-06 (formerly Lab 1403.54) New. #8796, eff 1-11-07; ss by #10809, eff 4-9-15 (from Lab 1403.38); ss by #14431, eff 11-22-25, EXPIRES: 11-22-35