What is the proper disposal method for oil-based paints?

• A. Pour into drain? No.
• B. Recycle with household recyclables.
• C. Do not dump them down the drain or in the trash; collect them in a used metal paint can with a lid and label it as hazardous waste.
• D. Mix with water and pour on soil.

Answer: (C)

The main concept being tested is that oil-based paints are hazardous waste and must be disposed of properly. These paints contain solvents and other chemicals that can contaminate soil and water, pose fire hazards, and release toxic fumes. Pouring them down a drain or tossing them in the trash can create environmental and safety problems and is often against local rules. The correct approach is to keep the paint in a sealed container—ideally a used metal paint can with a tight lid—and clearly label it as hazardous waste. Then take it to a household hazardous waste collection site or other approved disposal facility so it can be handled, treated, or recycled safely. Even for small amounts, avoid mixing with other substances or dumping anywhere; store it until you can dispose of it through the proper channel.