Final answer:
Empty bleach buckets are not suitable for transporting food because they are not food-grade containers and may contaminate the food.
Step-by-step explanation:
Empty bleach buckets are unacceptable for transporting food to offsite serving locations because they are not food-grade containers. Food-grade containers are specifically designed and made from materials that are safe for storing and transporting food. Bleach buckets may contain traces of chemicals that can contaminate the food and make it unsafe for consumption.