Cal. HSC § 114115

(a) Equipment food-contact surfaces and utensils shall be clean to sight and touch. (b) The food-contact surfaces of cooking equipment and pans shall be kept free of encrusted grease deposits and other soil accumulations. (c) Nonfood-contact surfaces of equipment shall be kept free of an accumulation of dust, dirt, food residue, and other debris. (d) Equipment shall be reassembled so that food-contact surfaces are not contaminated.