Cal. Health & Safety Code § 112535

All rooms of a frozen food locker plant shall at all times be maintained in a clean and sanitary condition. All equipment and utensils shall be cleaned when put into use and shall be thoroughly cleaned after each day’s use and shall be so stored or protected as not to become contaminated. Lockers shall be thoroughly cleaned before they are leased or put into the possession of any patron. The premises and surroundings of the plants shall be maintained in a clean and sanitary condition. The food stored shall be protected from filth, flies, dust, dirt, insects, vermin and any other contamination and from any unclean or filthy practice in the handling thereof or caring therefor. No food shall be stored in a condition or in a manner as to cause injury to or deterioration of articles of food in adjacent lockers.