What rate must users of passive radon devices submit for spiking?

To determine the correct rate for spiking in the context of passive radon devices, it's important to understand the significance of spiking as part of quality assurance protocols in radon measurement. Spiking refers to the deliberate introduction of a known quantity of contaminants (in this case, radon) to a sample to ensure the accuracy and reliability of measurement devices.

The established guideline for spiking recommends submitting a rate of 3%. This means that for every 100 passive radon devices deployed, 3 should be spiked with a known concentration of radon. This procedure helps in validating the performance of the measurement devices and ensuring that they are providing accurate readings in actual conditions. By adhering to this standard, professionals can maintain the integrity of their measurements and ensure public safety regarding radon exposure.

In contrast, the other suggested rates do not align with the recognized standards for spiking passive radon devices, thereby not providing the required level of quality assurance.