CDPH Lead Inspector/Assessor California State Practice Exam

How many aliquots should be collected for a composite play area soil sample?

1. 2-5 aliquots

2. 3-10 aliquots

3. 10-15 aliquots

4. 5-7 aliquots

The correct answer is: 3-10 aliquots

The appropriate number of aliquots to collect for a composite play area soil sample is typically 3-10 aliquots. This range is recommended to ensure that the sample accurately represents the overall area being assessed, as variation in soil composition and potential lead contamination can occur. Collecting a minimum of three aliquots allows for enough sample diversity to provide a reliable estimate of soil conditions while avoiding excessive sampling, which can be impractical and unnecessary. The upper limit of ten aliquots still stays manageable while providing a more comprehensive representation of the area, increasing the accuracy of the analysis for potential lead contamination. Therefore, selecting 3-10 aliquots balances thorough sampling with practical considerations in the assessment process.