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Default emission factors for the VOC content (by volume) of common surface coatings are listed in Table A5-7 ( VOC Content of Common Surface Coatings ). These emission factors are also embedded into FAA’s EDMS/AEDT. 

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## A5.3.4 De-icing and Anti-icing Operations 

Source: Emissions and Dispersion Modeling System (EDMS) User’s Manual , FAA-AEE-07-01 (Rev. 10 – 06/07/13), June 2013, 

http://www.faa.gov/about/office_org/headquarters_offices/apl/research/models/edms_model/media /EDMS_5.1.4_User_Manual.pdf, and Jagielski, Kurt D., and Robert J. O'Brien, Calculation Methods for Criteria Air Pollutant Emission Inventories, July 1994. 

The purpose of airport de -icing and anti-icing operations is to ensure safe aircraft departures, landings, and travel on airport grounds. Deicing operations remove snow and ice accumulations from aircraft and airfield surfaces. Anti -icing operat ions prevent snow and ice accumulating on aircraft and airfield surfaces, either before accumulation can take place or after a surface has been cleared by deicing operations. Aircraft de-icers and anti-icers typically contain water and propylene glyco l or ethylene glycol which emit evaporative emissions application. 

## A5.3.4.1 Methodology 

VOC emissions result from the application of deicing fluid to both aircraft and runways. stated previously, common aircraft deicing fluids are a mixture of water and propylene glycol or ethylene glycol. These chemicals are slightly volatile and a small fraction of the chemical likely to evaporate after the deicing fluid is applied. Other chemicals present in runway deicing fluids include urea and other organic and inorganic salts, most of which are unlikely to contribute to VOC emissions. 

