CDPH Lead Inspector/Assessor California State Practice Exam

In a risk assessment for 500 or more similar dwellings, how many total dwellings should be sampled?

1. 20

2. 24

3. 30

4. 50

The correct answer is: 24

In the context of a risk assessment for lead hazards in a significant number of similar dwellings, it is important to follow established guidelines for the number of units that should be sampled to ensure an accurate representation of lead exposure risks. According to the U.S. Department of Housing and Urban Development (HUD) guidelines, when dealing with 500 or more similar dwellings, a statistically valid approach is to sample 24 units. This number is derived based on considerations that balance the need for accuracy with the practicalities of sampling, enabling a meaningful analysis of lead levels and conditions across the broader population of dwellings. Sampling 24 units provides a systematic way to assess lead risk while ensuring the results are representative enough to inform public health response strategies effectively. By selecting this sample size, it's possible to gather sufficient data to draw reliable conclusions and make informed decisions regarding lead hazard management within a larger housing complex.