Principal (EPA supplement to government-wide definition at 2 CFR 180.995).

In addition to those listed in 2 CFR 180.995, other examples of individuals who are principals in EPA covered transactions include: (a) Principal investigators; (b) Technical or management consultants; (c) Individuals performing chemical or scientific analysis or oversight; (d) Professional service providers such as doctors, lawyers, accountants, engineers, etc.; (e) Individuals responsible for the inspection, sale, removal, transportation, storage or disposal of solid or hazardous waste or materials; (f) Individuals whose duties require special licenses; (g) Individuals that certify, authenticate or authorize billings; and (h) Individuals that serve in positions of public trust.