Interpretation concerning persistent standard threshold shift (STS) .

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.

June 4, 1986

Ms. Mari Franqui
CCC-A, Audiologist
ADVANTAGE Health Systems, Inc.
14062 Denver West Parkway, Suite 350
Golden, Colorado 80401

Dear Ms. Franqui:

This is in response to your letter of March 31 concerning persistent standard threshold shift (STS).

"Persistent STS" is a term the Occupational Safety and Health Administration (OSHA) uses to mean an STS that is subsequently confirmed by another audiogram.

Revising baseline audiogram when there is a standard threshold shift in only one ear.

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.

September 9, 2005

Ms. Laurie Wells
President, National Hearing Conservation Association
7995 E. Prentice Avenue
Suite 100 East
Greenwood Village, CO 80111-2710

Dear Ms. Wells:

Whether employers have the option to establish new baseline audiograms when business ownership changes, but medical records are maintained for 30 years.

OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.