Cal. Health & Safety Code § 114161

(a) Except as specified in subdivision (b), equipment, a cabinet used for the storage of food, or a cabinet that is used to store cleaned and sanitized equipment, utensils, laundered linens, and single-use articles shall not be in any of the following locations:
1. (1) In locker rooms.
2. (2) In toilet rooms.
3. (3) In refuse rooms.
4. (4) In mechanical rooms.
5. (5) Under sewer lines that are not shielded to intercept potential drips.
6. (6) Under leaking water lines, including leaking automatic fire sprinkler heads, or under lines on which water has condensed.
7. (7) Under open stairwells.
8. (8) Under other sources of contamination.
(b) If a mechanical clothes washer or dryer is provided, it shall be located so that the washer or dryer is protected from contamination and located only where there is no exposed food, clean equipment, utensils, and linens, and unwrapped single-use articles.