Division 5 The compost shall meet at least one of the following stability criteria:

Oxygen uptake rate:

• Definition: an indicator of the extent to which biodegradable organic matter is being broken down within a specified time period. The method is not suitable for material with a content of particle sizes > 10 mm that exceeds 20 %,

• Criterion: maximum 25 mmol O₂/kg organic matter/h; or

Self heating factor:

• Definition: the maximum temperature reached by a compost in standardised conditions as an indicator of the state of its aerobic biological activity,

• Criterion: minimum Rottegrad III.