What is the primary purpose of a wipe sample in lead abatement?

What is the primary purpose of a wipe sample in lead abatement?

• A. To measure lead residue on surfaces to assess compliance with clearance criteria
• B. To test air concentration
• C. To determine humidity
• D. To test soil outside

Answer: (A)

Surface residue measurement is the focus of wipe sampling in lead abatement. It directly checks how much lead dust remains on surfaces after cleaning, which is what occupants could be exposed to. By wiping a defined area with a standardized method and analyzing the residue in a certified lab, you obtain a lead value per area. That value is then compared to established clearance criteria to decide if the space is safe for occupancy. If the result is above the limit, more cleaning is needed and the area is re-tested until it passes. Wipe sampling is not about air, humidity, or outdoor soil. Air concentration testing looks at what's in the air, not what sits on surfaces. Humidity and outside soil have no direct relevance to indoor surface lead clearance after abatement.

Surface residue measurement is the focus of wipe sampling in lead abatement. It directly checks how much lead dust remains on surfaces after cleaning, which is what occupants could be exposed to. By wiping a defined area with a standardized method and analyzing the residue in a certified lab, you obtain a lead value per area. That value is then compared to established clearance criteria to decide if the space is safe for occupancy. If the result is above the limit, more cleaning is needed and the area is re-tested until it passes.

Wipe sampling is not about air, humidity, or outdoor soil. Air concentration testing looks at what's in the air, not what sits on surfaces. Humidity and outside soil have no direct relevance to indoor surface lead clearance after abatement.