Environmental Protection Agency (EPA) Lead Risk Assessor Practice Exam

Which of the following can be a source of lead exposure in older buildings?

1. Asbestos insulation

2. Oil-based paints

3. Varnish coatings

4. Ceramic tiles

The correct answer is: Oil-based paints

The correct answer relates to oil-based paints, which were commonly used in homes built before 1978, the year when the U.S. banned the use of lead-based paint in residential properties. These paints often contain lead to enhance durability and drying time. When the paint deteriorates due to age, wear, or damage, lead dust or chips can be created, posing a significant health risk, particularly to young children who may ingest lead particles from surfaces or objects they touch. Understanding the context is important since the other options, while associated with building materials, do not contribute to lead exposure in the same way. Asbestos insulation, for instance, is related to fibrous material used for thermal insulation but does not contain lead. Varnish coatings may have other hazardous components but typically do not involve lead as a primary ingredient. Ceramic tiles usually do not pose lead exposure risks unless lead is present in the glazing or in specific pigments, which is less common compared to the prominent risks posed by lead-based paint. This informs a clearer understanding of lead hazards specifically in older buildings and the historical practices that contributed to those hazards.