A dishwasher stores a bottle of degreaser on a shelf directly above a bin of fresh onions. This creates a risk of which type of contamination?

Giải thích

Storing chemicals above or next to food risks chemical contamination if the cleaner leaks or splashes onto the food. Chemicals must be stored in a separate area, below and away from food and food-contact surfaces. This is not biological or physical contamination, and degreaser is not a food allergen.