About this Manual

The aggregated emissions manuals complement the NPI Industry handbooks, and are intended to enable State and Territory Governments to estimate emissions from non-industrial activities (e.g. transportation, domestic and commercial activities) and emissions from industry which are not reported because the relevant thresholds are not exceeded.

This manual provides guidance on the estimation and spatial allocation of aggregated emissions from fuel burning at the following industrial and commercial facilities:
- facilities that do not burn 400 or more tonnes of fuel or waste in a year (i.e. facilities that do not trigger the NPI Category 2 thresholds); and
- facilities that trigger the NPI Category 2a and/or 2b thresholds, but fail to submit an annual report.

The overall contributions to an emissions inventory of emissions from the burning of solid, liquid and/or gaseous fuels at facilities that should report (but do not) could be quite significant, particularly if the number of these facilities is a significant fraction of the total number of facilities required to report.

A range of fossil fuels are burned in Australian airsheds and a wide variety of fuel-burning equipment such as boilers, dryers, furnaces, and process and space heaters are used. Since emissions vary considerably from one equipment and fuel type to another, information about fuel type and the type of combustion and pollution control equipment is desirable for emissions estimation. While this information is readily available for individual sites, overall or composite information for all facilities in an airshed is more difficult to assemble. Even with the best information available for these EETs, the estimates should only be considered accurate to an order of magnitude.

First published in September 1999
National Pollutant Inventory
Environment Australia

Application of the Manual

Each of the aggregated emissions manuals provides details of:

• the NPI substances that are expected to be emitted from the relevant aggregated source type;
• the origins or sources of the emissions, and the processes that may generate them;
• the impacts of any control equipment or procedures on those emissions;
• the broad approaches that may be employed in the estimation and spatial allocation of emissions;
• details of emission factors to be used in the estimation of emissions; and
• a series of illustrative sample calculations for each estimation technique.