Dish machine or sinks not set up or working properly, or missing sanitizer test kit and gauges.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.
Plumbing not installed or maintained properly — leaks, mop sink issues, unserviced water filters, or missing backflow prevention.
Floors, walls, ceilings, or attached equipment dirty, damaged, or poorly vented.