CDPH Lead Inspector/Assessor California State Practice Exam

What is the maximum number of chips that should be included in a composite paint chip sample?

1. Three

2. Four

3. Five

4. Six

The correct answer is: Five

The correct choice regarding the maximum number of chips that should be included in a composite paint chip sample is five. This guideline is based on standard practices for collecting and analyzing composite samples in lead assessment. Composite samples are important to ensure that the analysis provides a representative picture of the lead hazard present in a dwelling. By including multiple chips from different locations, the sample can better reflect the overall condition of the painted surfaces. Five chips are generally considered a balance that allows for adequate representation without making sample collection impractical or excessive. In practice, fewer chips may not capture the variability in lead levels across different areas, while too many chips could complicate the analysis and dilute the concentration of lead particles in the sample, leading to less accurate results. Therefore, using five chips is a practical approach that aligns with guidelines and ensures that the assessment is effective in determining potential lead hazards.