California Code, Health and Safety Code - HSC § 114178

(a) Except as specified in subdivision (d), cleaned equipment and utensils, laundered linens, and single-use articles shall be stored in a clean, dry location where they are not exposed to splash, dust, or other contamination, and at least six inches above the floor.

(b) Clean equipment and utensils shall be stored as specified in subdivision (a) and shall be stored covered or inverted in a self-draining position that allows air drying.

(c) Single-use articles shall be stored as specified under subdivision (a) and shall be kept in the original protective package or stored by using other means that afford protection from contamination until used.

(d) Items that are kept in closed packages may be stored less than six inches above the floor on dollies, pallets, racks, and skids that are designed as to be easily movable.