Which program is applied for the site investigation under cleanup activities?

• A. RCRA - Facility Investigation (RFI)
• B. CERCLA - Remedial Investigation (RI)
• C. MDEQ LUST Remainder of Phase I Activities including the Phase I report
• D. MDEQ LUST Phase II Activities

Answer: (B)

In cleanup projects, the formal site investigation follows the CERCLA framework. The Remedial Investigation is the phase that determines the nature and extent of contamination, routes of exposure, and the potential risks to human health and the environment. This detailed data collection and analysis set the stage for evaluating cleanup options in a Feasibility Study and then selecting a remedy with a Record of Decision.

RCRA Facility Investigation is tied to the RCRA corrective-action pathway and focuses on facilities handling hazardous waste under that program, not the broad CERCLA-initiated cleanup process. LUST activities (Phase I/II) are specific to leaking underground storage tanks and their related state programs, not the general site investigation under cleanup activities.