Raw meat, poultry, or seafood not separated from ready-to-eat food, or food left unprotected during prep, storage, or display.
Sewage or wastewater not disposed of properly — backups can contaminate the whole kitchen.
Dish machine or sinks not set up or working properly, or missing sanitizer test kit and gauges.
Floors, walls, ceilings, or attached equipment dirty, damaged, or poorly vented.