What proportion of bleach is used for a 100 PPM chlorine-based sanitizing solution?

To create a 100 PPM (parts per million) chlorine-based sanitizing solution, the correct proportion is indeed 1 ounce of bleach per gallon of water. This concentration is effective for sanitizing surfaces, as it strikes a balance between being potent enough to kill pathogens while being safe for food contact surfaces when used appropriately.

The 100 PPM concentration is often recommended as it is strong enough to be effective without posing too high of a risk of chemical residues on surfaces that come into contact with food, ensuring food safety standards are met. Using 1 ounce of bleach in a gallon of water allows for a diluted solution that is manageable and suitable for various sanitizing tasks in food handling environments.