Guide to Using Satellite Images in Support of Exceptional Event Demonstrations

Geigert, Michael

The Exceptional Events Rule, contained in Title 40 of the Code of Federal Regulations Part 50.14 (40CFR50.14), was revised by EPA in October of 2016. Although many elements go into the technical support document for an exceptional event, this guidance will cover the resources available from satellite images and data to support the weight of evidence. The following guidance played a critical role for the State of Connecticut in its successful demonstration to exclude ozone data from May 25-26, 2016 at several of its monitors because of the transport of pollutants from the wildfires at Fort McMurray, Alberta, Canada.


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This technical guidance document was produced by the NASA HAQAST Tiger Team "Supporting the Use of Satellite Data in State Implementation Plans (SIPs)" led by Professor Arlene Fiore. For additional resources see: Professor Fiore's website: