Referring to a Superfund site, all owners, operators, transporters, and disposers of hazardous waste are potentially responsible parties.
See CERCLA, SARA, SUPERFUND .
Example: After an investigation, the epa placed a certain site on its Superfund list. They looked at all paperwork related to historical ownership and use of the site, including material transporters, waste treaters, and disposers. The EPA prepared a list of
potentially responsible parties and sent each a registered letter to inform them of their potential liability for cleanup.