Environmental Protection Agency (EPA) Lead Risk Assessor Practice Exam

In a multi-family building of 128 units, what is the minimum number of dwellings to sample using the targeted/worst-case method?

1. 10 units

2. 19 units

3. 20 units

4. All units if less than 5

The correct answer is: All units if less than 5

When using the targeted/worst-case method for lead risk assessments, the minimum number of dwellings to sample is determined by the total number of units in the building. According to EPA guidelines, if there are fewer than 5 units in a multifamily building, all units should be sampled. This ensures that even in small buildings, there is comprehensive data on lead hazards, allowing for effective risk assessment and management. In the case of a building with 128 units, while it is not fewer than 5, the guideline emphasizes that for buildings with fewer than this threshold, all units must be assessed. This approach prioritizes safety and thoroughness, ensuring that no unit is left unassessed in smaller buildings, where the variance and risks might be greater. Therefore, the correct choice reflects the regulatory guidance on sampling, affirming that when fewer than 5 units are present, it is mandated to sample all of them to effectively manage lead risk.