CDPH Lead Inspector/Assessor California State Practice Exam

Which option is NOT valid for addressing inconclusive XRF readings?

1. Confirm results through EPA recognized laboratory

2. Assume positive results with client agreement

3. Conduct another XRF test immediately

4. Reject the inconclusive results

The correct answer is: Conduct another XRF test immediately

The option that is NOT valid for addressing inconclusive XRF readings is appropriately identified. When faced with inconclusive results from an XRF (X-ray fluorescence) test, conducting another XRF test immediately may not be the best course of action. This is primarily due to the possibility that the same factors causing the initial inconclusive results, such as surface contamination, equipment calibration issues, or environmental conditions, could also affect a subsequent test, therefore not providing any additional clarity. Confirming the results through an EPA-recognized laboratory is a standard practice, as laboratories can provide more definitive analysis and ensure that the readings align with regulatory standards. Assuming positive results with client agreement may introduce risk and potential liability, as it can lead to miscommunication about the presence of lead hazards. Rejecting inconclusive results without further action does not address the issue and thus could lead to oversights regarding potential lead contamination. Overall, the preferred approach would involve following protocols established in lead risk assessment best practices, ensuring that inconclusive results are deemed inconclusive until validated through reliable means rather than repeating the same test under similar conditions.