How frequently should measurements of suction in the main riser pipe be taken when activating an ASD system?

When activating an Active Soil Depressurization (ASD) system, it is essential to measure suction in the main riser pipe at least once upon system completion. This measurement is crucial for confirming that the system is functioning correctly and creating the necessary pressure differential to effectively mitigate radon entry from the soil.

Taking measurements upon system completion allows for an assessment of the system’s performance before it is put into regular use. This baseline data is important for future reference and possible adjustments to the system. Regular monitoring of suction levels ensures that the ASD system continues to operate effectively over time, but the initial measurement is critical in confirming that the installation meets design expectations.