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  2. National Emissions Standards for Hazardous Air Pollutants

    en.wikipedia.org/wiki/National_Emissions...

    For each listed source category, EPA indicates whether the sources are considered to be major sources or area sources. The 1990 Clean Air Act Amendments direct EPA to set standards for all major sources of air toxics, and for some area sources that are of particular concern. EPA is required to review all source category regulations every eight ...

  3. AP 42 Compilation of Air Pollutant Emission Factors - Wikipedia

    en.wikipedia.org/wiki/AP_42_Compilation_of_Air...

    In 1972, it was revised and issued as the second edition by the US Environmental Protection Agency EPA. In 1985, the subsequent fourth edition was split into two volumes: Volume I has since included stationary point and area source emission factors, and Volume II includes mobile source emission factors.

  4. Mercury regulation in the United States - Wikipedia

    en.wikipedia.org/wiki/Mercury_regulation_in_the...

    The movement toward the regulation of mercury from EGUs began in December 2000, when the Environmental Protection Agency determined the regulation of coal and oil-fired EGUs to be "appropriate and necessary" under the Clean Air Act, Section 112(c) standards for mercury emissions, adding these units to the list of sources that must be regulated ...

  5. Area source pollution - Wikipedia

    en.wikipedia.org/wiki/Area_source_pollution

    The U.S. Environmental Protection Agency has categorized 70 different categories of air pollution area source. [1] Locomotives operating on certain linear tracks are examples of a line source, whereas locomotives operating within a railyard are an example of an area source of pollution. Other area sources of air pollution are:

  6. New Source Performance Standards - Wikipedia

    en.wikipedia.org/wiki/New_Source_Performance...

    New Source Performance Standards (NSPS) are pollution control standards issued by the United States Environmental Protection Agency (EPA). The term is used in the Clean Air Act Extension of 1970 (CAA) to refer to air pollution emission standards, and in the Clean Water Act (CWA) referring to standards for water pollution discharges of industrial wastewater to surface waters.

  7. Air quality law - Wikipedia

    en.wikipedia.org/wiki/Air_quality_law

    For example, the United States Environmental Protection Agency, National Oceanic and Atmospheric Administration, National Park Service, and tribal, state, and local agencies coordinate to produce an online mapping and data access tool called AirNow, which provides real-time public access to U.S. air quality index information, searchable by ...

  8. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    The majority of CO emitted into the ambient air is from mobile sources. The EPA has reviewed and assessed the current scientific literature with respect to CO in 1979, 1984, 1991, and 1994. [11] After the review in 1984 the EPA decided to remove the secondary standard for CO due to lack of significant evidence of the adverse environmental impacts.

  9. Regulation of greenhouse gases under the Clean Air Act

    en.wikipedia.org/wiki/Regulation_of_greenhouse...

    The United States Environmental Protection Agency (EPA) began regulating greenhouse gases (GHGs) under the Clean Air Act ("CAA" or "Act") from mobile and stationary sources of air pollution for the first time on January 2, 2011. Standards for mobile sources have been established pursuant to Section 202 of the CAA, and GHGs from stationary ...

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