OSHA Regulation 29 (FR1926.51 (c)

"Toilets at construction jobsites."

(c)(1)

Toilets shall be provided for employees according to the following table:

                      Table D-1

______________________________________________________________
                |
   Number of    |
   employees    |
_________________|____________________________________________
                |
20 or less.......|  1
                |
20 or more.......|  1 toilet seat and 1 urinal per 40 workers.
                |
200 or more......|  1 toilet seat and 1 urinal per 50 workers.
_________________|____________________________________________

(c)(2)

Under temporary field conditions, provisions shall be made to assure not less than one toilet facility is available.

(c)(3)

Job sites, not provided with a sanitary sewer, shall be provided with one of the following toilet facilities unless prohibited by local codes:

(c)(3)(i)

Privies (where their use will not contaminate ground or surface water);