What does dust clearance testing measure?

• A. Surface lead on specific surfaces.
• B. Airborne lead during abatement.
• C. Settled lead dust in a room.
• D. Soil lead around the foundation.

Answer: (C)

Dust clearance testing is about measuring the amount of lead-containing dust that has settled on interior surfaces after abatement. It uses wipe samples from predetermined surfaces (like floors and window sills) and laboratory analysis to quantify how much lead remains on those surfaces. The results are compared to established clearance standards to decide if the area is clean enough to pass. This focuses on settled dust on surfaces, not on the air in the room or soil outside, which are assessed by separate types of testing.