Standard Interpretations - Table of Contents
• Standard Number: 1910.141(a)(1); 1910.141(c)(1)(i); 1910.141(d)


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 http://www.osha.gov.


May 18, 1999

MEMORANDUM FOR: MICHAEL G. CONNORS
REGIONAL ADMINISTRATOR

FROM: RICHARD FAIRFAX, DIRECTOR
[DIRECTORATE OF ENFORCEMENT PROGRAMS]

SUBJECT: Water Closets: Use of Porta-Potts


This is in response to a March 9 e-mail from William Wiehrdt concerning the use of Porta Potts in lieu of water closets that are flushed with water at the United Parcel Service (UPS) facility at Chicago O'Hare Airport.

The UPS facility has four plumbed water closets designated for men and one plumbed water closet designated for women. During the peak season, the P.M. shift employs additional workers, so more water closets are needed. In lieu of adding additional plumbed water closets, UPS proposes adding Porta-Potts.

The general industry sanitation standard, 29 CFR 1910.141(c)(1)(i), requires the minimum number of water closets to