Phase III describes the remediation plan if contaminants are found during Phase II.

• A. Phase II will determine site use restrictions
• B. Phase III can proceed before Phase II completes
• C. Phase III is undertaken only after Phase II confirms contamination
• D. Phase III involves sampling for contaminants

Answer: (C)

This question tests the sequencing and conditional nature of remediation steps. Phase II is the data-gathering step that shows whether contaminants are present and at what levels. Phase III follows only after that data confirms contamination, because the remediation plan and its implementation depend on knowing what needs to be cleaned up. So undertaking Phase III only after Phase II confirms contamination is the correct conceptual link.

The other ideas don’t fit because Phase II’s main purpose is to identify contaminants (not to set site use restrictions), Phase III cannot start before Phase II completes since the remediation plan needs the Phase II results, and Phase III is about executing the cleanup rather than sampling for contaminants (sampling is done in Phase II).