Cal. Code Regs. tit. 8, § 6978 – Sanitation.

(a) An adequate number of dry or water closets shall be provided at convenient locations on the main working levels or on the surface. Ready means of access shall be provided to each closet.
Note: For purposes of this section, “convenient” means within five minutes of travel from any working place.
(b) Means shall be provided for removing the contents of each closet and for cleansing of the closet. The contents shall be removed often enough to prevent the closet from becoming offensive.
(c) Each closet shall be provided with some disinfectant or deodorant to be sprinkled upon the contents thereof.
(d) All men employed at any mine where closets are provided shall be required to use such closets.