CDPH Lead Inspector/Assessor California State Practice Exam

How many additional dwellings need to be sampled for every increment of 100 dwellings beyond 500 in a risk assessment?

1. 1

2. 2

3. 3

4. 5

The correct answer is: 1

In a risk assessment related to lead sampling in residential dwellings, the protocol often requires additional samples to be collected to ensure that the data is representative of the entire population. Specifically, for every increment of 100 dwellings beyond the initial 500 dwellings, it is standard practice to sample just one additional dwelling. This approach balances the need for comprehensive data collection with resource efficiency, ensuring that enough information is gathered without excessively expanding the sampling effort. This methodology recognizes that the correlation between the number of additional dwellings and the incremental sampling needed can diminish as the sample size grows. Therefore, after 500 dwellings, adding only one more sample for every additional 100 dwellings helps maintain a statistically valid assessment while keeping the overall assessment manageable.