The segregation of waste from significant contact with humans or the wider environment, normally belowground but sometimes in buildings aboveground, is called what?

• A. Geologic disposal
• B. Isolation
• C. Open dump
• D. Containment building

Answer: (B)

Isolation is the practice of keeping waste separated from people and the broader environment to prevent exposure and contamination. It focuses on preventing contact by placing waste in barriers or barriers-like environments, typically below ground or inside secure facilities, so pathways for exposure or migration are minimized. This approach reduces risks from leaching, infiltration, or direct human contact.

Geologic disposal refers to placing waste in deep geological formations, which is a specific disposal method rather than the general act of keeping waste away from contact. A containment building is a structure used to hold or treat waste, but isolation describes the broader goal of preventing exposure. An open dump is an unmanaged disposal method where waste is exposed, which directly contradicts isolation.