Testing of indoor air quality should include the following elements:
- The contaminant sampling and averaging times and the measurement methods should be sufficient to achieve a Limit of Detection that is below the maximum allowable concentrations.
- Testing should be conducted with the HVAC system operated at the minimum design outdoor air ventilation rate.
- Air samplers and monitors should be located near likely sources of formaldehyde and other volatile organic compounds, at a height of 3 to 6 feet from the floor and well away from walls and air diffusers.
- The test protocols should be justified with documentation to show that appropriate sampling methods and times were used.