New York Codes, Rules and Regulations
Title 6 - DEPARTMENT OF ENVIRONMENTAL CONSERVATION
Chapter III - AIR RESOURCES
Subchapter A - PREVENTION AND CONTROL OF AIR CONTAMINATION AND AIR POLLUTION
Part 207 - Control Measures For An Air Pollution Episode
Section 207.1 - Definitions

(a) Significant air contamination source. Any air contamination source the emissions of which alone or in combination with others can be expected to have an adverse effect on ambient air quality during an air pollution episode. This category includes, but is not limited to: fossil fuel burning equipment with a maximum operating heat input exceeding 200 million Btu per hour; processes and exhaust or ventilating systems with particulate emissions in excess of 100 lb/hr; incinerators with a refuse charging capacity of 2,000 lb/hr or more.