At what rate must duplicate measurements be completed during radon testing?

The correct rate for duplicate measurements during radon testing is crucial for ensuring the reliability and accuracy of testing outcomes. In this context, the practice guidelines indicate that duplicate measurements should be completed at a frequency of one in ten, which translates to 10% of total tests conducted. This approach helps account for variability in measurements, ensuring that the results reflect accurate radon levels in the environment being assessed. It also serves as a quality control measure, allowing professionals to identify any inconsistencies or errors in their radon testing protocols.

By implementing a systematic approach to duplicate testing at this specified rate, practitioners can enhance the credibility of their results and contribute to a higher overall standard in radon measurement practices. This commitment to accuracy reinforces the importance of thoroughness in environmental testing to protect health and safety.

The other rates do not align with the established guidelines and thus would not meet the recommended quality assurance practices in radon measurements. Adhering to the one in ten rule ensures that the testing protocols remain robust and scientifically sound.