Regulations require that you maintain records demonstrating compliance with closure or change in service requirements for _______ from the date of closure.

• A. One year
• B. Three years
• C. Five years
• D. Ten years

Answer: (B)

The key idea here is how long you must keep records proving compliance after you close or change a service. The required retention period is three years from the date of closure. This window gives regulators a reasonable span to review your actions, verify that closure steps were properly followed, permits or changes were satisfied, and any post-closure monitoring was completed. Keeping records for three years supports audits or investigations that might occur within that timeframe. One year is usually too short to cover all potential regulatory checks, while longer periods like five or ten years aren’t required for this specific requirement. Three years strikes the appropriate balance for documenting compliance after closure.