True or False: The purpose of quality control procedures is to ensure measurement results are defensible, with results needing evaluation and documentation.

The statement is true because quality control procedures in radon measurement are essential for ensuring that measurement results are accurate, reliable, and defensible. The implementation of these procedures involves a systematic approach to monitoring the measurement process, which includes regular evaluations of both the equipment and the methodologies used.

Moreover, thorough documentation serves as a record of the procedures followed, the results obtained, and any deviations from expected standards. This documentation is critical in establishing a clear chain of evidence, especially when results are submitted for regulatory compliance or health risk assessments. Without proper evaluation and documentation of the measurement process, the results may be challenged and deemed unreliable, leading to potentially serious consequences in terms of public health and safety. Thus, both evaluation and documentation are integral to maintaining the integrity of radon measurements.