Cleaning chemicals or other toxic substances unlabeled or stored where they can reach food.
Dirty wiping cloths not stored in sanitizer, or soiled linens handled improperly.
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.
Employee jackets, phones, drinks, or other personal items stored where they can contaminate food.