CERCLA RI may be conducted at sites placed on which list?

• A. National Priorities List (NPL)
• B. Local Priority List
• C. Environmental Investigation List
• D. Hazardous Site Inventory

Answer: (A)

CERCLA’s Remedial Investigation is part of the Superfund cleanup process and is conducted for sites that EPA has placed on the National Priorities List. The National Priorities List identifies the most seriously contaminated sites selected for cleanup under Superfund, triggering the RI/FS process to determine the extent of contamination and evaluate cleanup options. Other lists (local priority lists or other non-Superfund inventories) are not the federal trigger for a CERCLA RI, so they don’t define where this investigation occurs.