Roaches, rodents, flies, or other pests present — or doors and openings that let them in not protected.
Cleaning chemicals or other toxic substances unlabeled or stored where they can reach food.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
High-risk food (like meat) thawed improperly, promoting bacterial growth.
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.
Floors, walls, ceilings, or attached equipment dirty, damaged, or poorly vented.