PRP
Potentially Responsible Party (PRP). Any individual or company(ies) identified as potentially liable under CERCLA for cleanup or payment for costs of cleanup of Hazardous Substance sites. PRPs may include individual(s), or company(ies) identified as having owned, operated, or in some other manner contributed wastes to Hazardous Substance sites.
Source
40 CFR § 35.6015
Scoping language
As used in this subpart, the following words and terms shall have the following meanings: