Food held, cooled, cooked, or reheated outside safe temperatures, letting dangerous bacteria multiply.
Missing hair or beard restraint, dirty work clothes, jewelry, or painted/artificial fingernails during food prep.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
Plumbing not installed or maintained properly — leaks, mop sink issues, unserviced water filters, or missing backflow prevention.