How is loading measured?

How is loading measured?

• A. air sampling
• B. wipe sampling or vacuum sampling
• C. water sampling
• D. soil sampling

Answer: (B)

Measuring loading is about how much lead dust is present on a surface, expressed as mass per unit area. The best way to determine this is by collecting the dust from a defined surface area using wipe sampling or vacuum sampling and then analyzing the sample to report lead mass per area (for example, micrograms per square foot or per square centimeter). Wipe sampling uses a clean cloth or swab to pull dust off the surface, while vacuum sampling uses a calibrated device to collect dust onto a collection pad or filter. These methods directly quantify surface contamination, which is what “loading” refers to. Air sampling, water sampling, and soil sampling measure lead in different media or exposure pathways and do not measure surface dust loading.

Measuring loading is about how much lead dust is present on a surface, expressed as mass per unit area. The best way to determine this is by collecting the dust from a defined surface area using wipe sampling or vacuum sampling and then analyzing the sample to report lead mass per area (for example, micrograms per square foot or per square centimeter). Wipe sampling uses a clean cloth or swab to pull dust off the surface, while vacuum sampling uses a calibrated device to collect dust onto a collection pad or filter. These methods directly quantify surface contamination, which is what “loading” refers to. Air sampling, water sampling, and soil sampling measure lead in different media or exposure pathways and do not measure surface dust loading.