What is the standard requirement for leftover food storage depth?

The correct requirement for leftover food storage depth is no more than 3 inches. This standard is established to ensure that food cools rapidly and evenly, preventing the growth of harmful bacteria that can thrive in the "danger zone" temperatures. When food is stored too deeply, it can retain heat longer, leading to potential food safety issues. By limiting the depth to 3 inches, it allows for effective cooling and maintains food safety standards. Additionally, this practice helps to ensure that food can be stored safely in refrigerators or freezers without compromising quality during storage.