What is the maximum acceptable relative percent difference (RPD) for results greater than 4 pCi/L?

In radon measurement, when dealing with results greater than 4 pCi/L, the established maximum acceptable relative percent difference (RPD) is 36%. This value is critical in ensuring the accuracy and reliability of radon measurements, as it reflects the allowable variability between two measurements taken under similar conditions.

The RPD is often used to assess the precision of measurements, indicating that as the concentration of radon increases, the allowed discrepancy between measured values also increases to maintain a high level of confidence in the results. This is particularly important in health-related assessments, where higher levels of radon may pose significant risks. By adhering to this specific RPD standard, technicians can ensure that the data derived from radon testing is valid and can be used to make informed decisions regarding safety and mitigation strategies.

Understanding the correct RPD value is essential for compliance with regulatory standards and guidelines in radon measurement practices, which ultimately support effective public health protection efforts.