How do facilities estimate their emissions?
Each industry has an Emission Estimation Technique (EET) Manual which contains detailed information on estimating emissions. Estimation techniques include direct measurement, mass balance engineering equations and emission factors. Alternative EETs may be used providing they have state or territory environment agency approval. Manuals are available online or by calling your local NPI officer. Facilities are required to report emissions above established thresholds to their state or territory environment agency once a year. More about estimating emissions and NPI contacts.