User:Milton Beychok/Sandbox
The AP 42 Compilation of Air Pollutant Emission Factors, was first published by the U.S. Public Health Service in 1968. In 1972, it was revised and issued as the second edition by the U.S. Environmental Protection Agency (EPA). In 1985, the subsequent fourth edition was split into two volumes. Volume I includes stationary point and area source emission factors, and Volume II includes mobile source emission factors. Volume I is currently in its fifth edition and is available on the Internet.[1] Volume II is no longer maintained as such, but roadway air dispersion models for estimating emissions from onroad vehicles and from non-road vehicles and mobile equipment are also available on the Internet.[2]
In routine common usage, Volume I of the emission factor compilation is very often referred to as simply AP 42. Print copies of AP 42 are no longer available.
Introduction
Air pollutant emission factors are representative values that attempts to relate the quantity of a pollutant released to the ambient air with an activity associated with the release of that pollutant. These factors are usually expressed as the weight of pollutant divided by a unit weight, volume, distance, or duration of the activity emitting the pollutant (e.g., kilograms of particulate emitted per megagram of coal burned). Such factors facilitate estimation of emissions from various sources of air pollution. In most cases, these factors are simply averages of all available data of acceptable quality, and are generally assumed to be representative of long-term averages.[1]
The equation for the estimation of emissions before emission reduction controls are applied is:
- E = A × EF
and for emissions after reduction controls are applied:Cite error: Closing </ref> missing for <ref> tag
Chapters 5 and 7 discussed above are illustrative of the type of information contained in the other chapters of AP 42. It should also be noted that many of the fugitive emission factors in Chapter 5 and the emissions calculation methodology in Chapter 7 and the TANKS program also apply to many other industrial categories besides the petroleum industry.
Other sources of emission factors
General emission factors
- United Kingdom's emission factor database.
- European Environment Agency's 2005 Emission Inventory Guidebook.
- Australian National Pollutant Inventory Emissions Estimation Technique Manuals.
- Fugitive emissions leaks from ethylene and other chemical plants.
Greenhouse gas emission factors
- Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories (reference manual).
- Canadian GHG Inventory Methodologies.
- Sangea - American Petroleum Institute Greenhouse Gas Emission Estimation Methodologies.
- Mining Association Of Canada Greenhouse Gas Emission Estimation Methodologies.