Environmental Protection Agency (EPA) Model Lead Based Paint Risk Assessor Practice Test

For composite risk assessment, how many samples should be taken from a floor and window?

1. 1 from a floor, 3 from windows

2. 1 from a floor, 2 from windows

3. 2 from a floor, 2 from windows

4. 3 from a floor, 1 from windows

The correct answer is: 1 from a floor, 2 from windows

The recommended approach for composite risk assessment balances the need for adequate data collection with practical considerations. Taking one sample from a floor and two from windows strikes a reasonable equilibrium. This is largely due to the fact that windows are significant sources of lead dust due to the potential for lead exposure from paint deterioration and dust accumulation. By sampling two window areas, the assessment can be more comprehensive and reflect variations that might exist based on different window conditions or locations within the property. In contrast, the sole floor sample is sufficient because floors generally should reflect a more stable lead dust environment and often do not show as much variation as windows might. This sampling strategy ensures a focused yet effective assessment of lead exposure risks in the home, allowing for reliable conclusions based on the data collected. Overall, this choice aligns with guidelines and practices aimed at providing a thorough evaluation while not unnecessarily complicating the sampling process.