The testing frequency for the air emission by mass balance calculation is based on an annual verification. The testing cycles run from 1 January to 31 December within the same calendar year. The data is reported in the MMCF Module (on the ZDHC Supplier Platform)

The testing cycle for direct monitoring of ambient air emissions (sampling and testing by an ISO 17025 accredited laboratory shall be done at least once a year) or air dispersion modelling data (yearly average) runs from 1 January to 31 December within the same calendar year. The data is reported in the MMCF Module (on the ZDHC Supplier Platform)