New York City Food Protection Practice Test

For a 100 PPM chlorine-based sanitizing solution, how much bleach should be added to 1 gallon of water?

1. 1/4 ounce of bleach

2. 1/2 ounce of bleach

3. 1 ounce of bleach

4. 2 ounces of bleach

The correct answer is: 1 ounce of bleach

To achieve a 100 PPM (parts per million) concentration of a chlorine-based sanitizing solution in 1 gallon of water, the correct amount of bleach needs to be calculated based on standard dilution practices. For a typical household bleach that contains about 5-6% sodium hypochlorite, the standard guideline indicates that to reach 100 PPM in 1 gallon of water, approximately 1 ounce of bleach should be added. This measurement is grounded in food safety and sanitation protocols, as it ensures that the sanitizing solution is effective while being safe for food contact surfaces. Choosing 1 ounce allows for achieving the required concentration without over-sanitizing, which could lead to issues such as chemical residues on food contact surfaces. Using the right concentration is crucial for effective sanitization while maintaining safety standards in food preparation environments.