What must always be done after completing a risk assessment using the XRF unit?

After completing a risk assessment using the XRF unit, it is essential to calibrate the device. Calibration is crucial because it ensures the accuracy and reliability of the measurements taken during the assessment. The XRF unit analyzes paint and substrates for lead content, and if the device is not properly calibrated after use, it can lead to incorrect data, which may affect subsequent risk assessments and decision-making regarding lead safety. Regular calibration is necessary to maintain the functionality and precision of the unit, thus ensuring that any future readings are trustworthy and that lead exposure risks are accurately assessed.

While turning off the unit, storing it securely, and submitting reports to relevant authorities are also important practices, they do not specifically relate to the immediate technical requirements necessary for maintaining the integrity of the XRF unit's functionality following a risk assessment.