Food from an unapproved supplier, unsafe or spoiled food, missing shellfish harvest tags, or raw fish without required parasite destruction.
Food held, cooled, cooked, or reheated outside safe temperatures, letting dangerous bacteria multiply.
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).