Emissions Control Technology (ECT)<span class=" width="600" />

Emissions Control Technology (ECT)

A process, equipment and/or system that reduces emissions.

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Rich Burn<span class=" width="600" />

Rich Burn

Spark ignited engine where the manufacturer’s recommended operating air/fuel ratio divided by the theoretical air-to-fuel ratio required for complete combustion at full load conditions is less than or equal to 1.1. [Source: Code of Federal Regulations, Title 40, Part 63.6675.]

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Nonattainment<span class=" width="600" />


An area that does not meet (or that contributes to ambient air quality in a nearby area that does not meet) the national primary or secondary ambient air quality standard for the pollutant established by the U.S. Environmental Protection Agency pursuant to the federal Clean…

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Criteria Pollutant<span class=" width="600" />

Criteria Pollutant

A pollutant determined to be hazardous to human health and regulated under EPA’s National Ambient Air Quality Standards.  [Source: EPA website: http://www.epa.gov/airquality/urbanair/]

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Carbon Content Coefficient (Combusted Fossil Fuels)<span class=" width="600" />

Carbon Content Coefficient (Combusted Fossil Fuels)

The estimated carbon content of combusted fossil fuels representing the maximum potential emissions to the atmosphere if all carbon in the fuel were to be oxidized during combustion.  [Source: Annex 2 Methodology and Data for Estimating CO2 Emissions from Fossil Fuel Combustion, Inventory of U.S. Greenhouse…

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Best Available Control Technology (BACT)<span class=" width="600" />

Best Available Control Technology (BACT)

A case-by-case decision that considers energy, environmental and economic impacts in establishing an emissions limitation based on the maximum degree of control that can be achieved. BACT can be add-on control equipment, or modification of production processes or methods. BACT may be a design, equipment,…

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Attainment<span class=" width="600" />


An area that meets the national primary or secondary ambient air quality standards for a particular pollutant established by the U.S. Environmental Protection Agency pursuant to the federal Clean Air Act [as amended].  [Source: U.S. Environmental Protection Agency (USEPA) website]

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Air Basin<span class=" width="600" />

Air Basin

A land area with generally similar meteorological and geographic conditions throughout. To the extent possible, air basin boundaries are defined along political boundary lines and include both the source and receptor areas of air emissions. California is currently divided into 15 air basins. [Source: California Air…

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