California Code, Health and Safety Code - HSC § 114254.2

(a) Except as specified in subdivision (b), poisonous or toxic materials shall be stored or displayed so they can not contaminate food, equipment, utensils, linens, and single-use articles by separating the poisonous or toxic materials by spacing or partitioning and locating the poisonous or toxic materials in an area that is not above food, equipment, utensils, linens, and single-use articles.

(b) Equipment and utensil cleaners and sanitizers may be stored in warewashing areas for availability and convenience if the materials are stored to prevent contamination of food, equipment, utensils, linens, and single-use articles.