Sanitary Landfills are repositories of MSW engineered to hold MSW with as little contamination of the surrounding environment as possible. Which option identifies this concept?

• A. Leachate
• B. Incineration
• C. Waste-to-Energy
• D. Sanitary Landfills

Answer: (D)

The concept being tested is the idea of an engineered repository designed specifically to minimize environmental contamination. A sanitary landfill is planned and built with features like liners, leachate collection systems, gas management, daily cover, and monitoring to keep the surrounding environment as protected as possible from waste byproducts. That description matches the purpose and definition of a sanitary landfill.

Leachate is the problematic liquid that can infiltrate and carry contaminants from waste, which is what the landfill is designed to control, not the type of facility itself. Incineration and waste-to-energy are methods of reducing waste volume or recovering energy, not repositories designed to contain waste with minimal leakage. So the option that identifies the described concept is the sanitary landfill itself.