CDPH Lead Inspector/Assessor California State Practice Exam

How often should the second XRF calibration check be performed during inspections?

1. Every hour

2. After lunch

3. Every 4 hours or after the day's inspection

4. At the end of each week

The correct answer is: Every 4 hours or after the day's inspection

The second XRF calibration check should be performed every 4 hours or after the day's inspection to ensure that the X-ray fluorescence (XRF) instrument is functioning correctly and providing accurate measurements of lead levels. This frequency helps account for any potential drift in the calibration that might occur due to prolonged use. Regular checks ensure that any variances are identified and remedied quickly, which is crucial for maintaining compliance with safety standards and delivering reliable assessment results in lead inspections. Ensuring proper calibration is vital because inaccurate readings can lead to incorrect conclusions about the presence of lead, potentially putting individuals at risk. Thus, adhering to this standard practice supports the integrity of the inspection process.