Article 3. Janitorial Facilities of California Health And Safety Code >> Division 104. >> Part 7. >> Chapter 9. >> Article 3.

(a) At least one curbed cleaning facility or janitorial sink equipped with hot and cold water and a drain shall be provided and conveniently located for the cleaning of mops or similar wet floor cleaning tools and for the disposal of mop water and similar liquid waste.
  (b) Restricted food service facilities shall be exempt from subdivision (a) if hot water is available for janitorial purposes and wastewater from janitorial activities is disposed of through an approved sewage disposal system.

A room, area, or cabinet separated from any food preparation or storage area, or warewashing or storage area shall be provided for the storage of cleaning equipment and supplies.

After use, mops shall be placed in a position that allows them to air-dry without soiling walls, equipment, or supplies.