A more thorough explanation:

Definition: An arranger for disposal is an entity that owns or possesses hazardous substances and is responsible for disposing of them or controlling them to prevent harm to the environment. This entity can be held liable for environmental cleanup costs under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

• A chemical company that disposes of its waste in a landfill is an arranger for disposal.
• A hospital that generates medical waste and contracts with a disposal company to properly dispose of it is also an arranger for disposal.

These examples illustrate how an entity that creates or possesses hazardous substances has a responsibility to properly dispose of them to prevent harm to the environment. If they fail to do so, they can be held liable for cleanup costs under CERCLA.