CDPH Lead Inspector/Assessor California State Practice Exam

How many dwellings should be sampled for 21-75 similar dwellings in a risk assessment?

1. 5 or 15%

2. 8 or 30%

3. 10 or 20%

4. 15 or 25%

The correct answer is: 10 or 20%

In the context of risk assessments for lead exposure in a group of similar dwellings, industry standards and regulatory guidelines provide clear guidelines for sample size. For a total of 21 to 75 similar dwellings, the recommended approach is to sample approximately 10 dwellings or 20% of the total. This percentage is derived from statistical sampling principles that aim to ensure a representative sample is collected for assessment while also maintaining practical feasibility. Sampling 10 dwellings strikes a balance between gathering enough data to form reliable conclusions about lead exposure and not overwhelming the resources available for the assessment. Additionally, it reflects best practices established to ensure comprehensive risk evaluation without necessitating an exhaustive review of every dwelling in the group. Utilizing this method helps inspectors ensure a robust risk assessment while adhering to regulatory expectations for sampling.