What is the recommended occurrence rate for duplicates in radon testing?

The recommended occurrence rate for duplicates in radon testing is typically set at 10%. This percentage is a standard guideline used by professionals to ensure the reliability and accuracy of radon measurements. Duplicates function as a quality control measure to account for variability in radon levels that can occur due to several factors, such as changes in weather conditions, the time of sampling, and the inherent variability of radon itself.

By establishing a 10% occurrence rate for duplicates, testers can gather sufficient data to confirm that their results are consistent and trustworthy. This practice helps in identifying discrepancies that could suggest either issues with the testing process or environmental variations that need addressing. Maintaining this level of diligence is crucial for health and safety, considering the potential health risks associated with radon exposure. Therefore, the 10% figure provides a balanced approach to quality assurance in radon testing protocols.