Food held, cooled, cooked, or reheated outside safe temperatures, letting dangerous bacteria multiply.
Water not safe, or hot (100°F) and cold water not available under pressure.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
Floors, walls, ceilings, or attached equipment dirty, damaged, or poorly vented.
Inadequate lighting, or bulbs over food areas not shielded or shatter-protected.