1. 1. An excessive noise exposure is sound which exceeds the times and intensities listed in the following table: DurationSound level,DurationSound level, per daydBA slowper daydBA slow hoursresponseminutesresponse 89052106 79145107 69237108 59333109 41/29430110 49526111 31/29622112 39718113 21/29816114 21/49915115 2100No exposure greater 13/4101than 115 permitted 11/2102 11/4103 11/8104 1105
2. 2. The workers’ compensation commissioner may promulgate rules pursuant to chapter 17A to amend this table based upon changes recommended in nationally recognized consensus standards.
3. 3. An employer shall immediately inform an employee if the employer learns that the employee is being subjected to sound levels and duration in excess of those indicated in the above table. In instances of occupational hearing loss alleged to have occurred, either in whole or in part prior to January 1, 1981, an employer shall provide upon request by an affected employee whatever evidence is available to the employer of the date, duration, and intensities of noise to which the employee was subjected in employment.

[C81, §85B.5] 98 Acts, ch 1061, §11; 98 Acts, ch 1160, §3; 2009 Acts, ch 41, §263