CDPH Lead Inspector/Assessor California State Practice Exam

What should be the size of a paint-chip sample for accurate analysis?

1. 1-2 square inches

2. 2-4 square inches

3. 4-6 square inches

4. 6-8 square inches

The correct answer is: 2-4 square inches

For accurate analysis, the recommended size of a paint-chip sample is between 2 to 4 square inches. This size is considered optimal for laboratory testing because it provides a sufficient amount of material for accurate detection and quantification of lead content. A sample within this range balances the need for enough material to obtain reliable results while not being overly large, which could complicate the sampling process or lead to unnecessary waste. Smaller samples may not provide enough material for precise detection and could lead to erroneous results. Conversely, larger samples may introduce variables that could alter the analysis or simply be impractical to obtain in some situations. In professional practice, adhering to the guideline of taking samples within the 2 to 4 square inch range ensures that the laboratory can conduct tests effectively and accurately assess the lead levels present.