Final answer:
Tile flooring is the approved method of protecting the water supply for a chemical dispenser.
Step-by-step explanation:
When it comes to protecting the water supply for a chemical dispenser, the approved method would be to use tile flooring.
Tile flooring is impermeable, meaning that it does not allow liquids to pass through, making it a suitable option to prevent any chemicals from seeping into the water supply.
Rubber flooring, carpet flooring, and wood flooring are not as effective in protecting the water supply.