If XRF readings are inconclusive, what is the recommended action?

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Multiple Choice

If XRF readings are inconclusive, what is the recommended action?

XRF is a quick screening tool for lead in paint, but it can run into limitations that make some readings inconclusive. Multi-layer coatings, surface condition, chalking, and instrument calibration can all blur the result, so you may not get a definitive above- or below-threshold determination. When that happens, collect paint chip samples from the surface and send them to an accredited laboratory for confirmatory analysis using validated methods. Lab results give precise lead concentrations and support a sound, defensible hazard assessment and remediation plan. Repeating the XRF on the same surface won’t resolve the uncertainty, and a moisture meter isn’t appropriate for detecting lead in paint. Collecting chips provides the definitive information you need.

XRF is a quick screening tool for lead in paint, but it can run into limitations that make some readings inconclusive. Multi-layer coatings, surface condition, chalking, and instrument calibration can all blur the result, so you may not get a definitive above- or below-threshold determination. When that happens, collect paint chip samples from the surface and send them to an accredited laboratory for confirmatory analysis using validated methods. Lab results give precise lead concentrations and support a sound, defensible hazard assessment and remediation plan. Repeating the XRF on the same surface won’t resolve the uncertainty, and a moisture meter isn’t appropriate for detecting lead in paint. Collecting chips provides the definitive information you need.

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