Besides keeping food at least 6 inches off the floor, which additional storage practice protects food from contamination?

Explanation

Food must be stored where it is protected from contamination: away from walls, off the floor, and never beneath exposed sewer lines, leaking pipes, condensation, or open stairwells. Cases under a dripping pipe are contaminated when staff open the plastic film, since the outside of the wrap is what got wet. Dry goods stacked under an exposed waste line sit under the single worst overhead hazard in the kitchen. And cleaning chemicals must be stored below and away from food, never on a shelf above it, because a leaking container drips past any lid onto the food.