National Ambient Air Quality Standards (NAAQS definition

National Ambient Air Quality Standards (NAAQS means the allowable concentrations of air pollutants in the ambient air specified by the Federal Government (Title 40, Code of Federal Regulations, Part 50).

National Ambient Air Quality Standards (NAAQS means maximum allowable ambient air concentrations for specified air contaminants and monitoring periods as established by the federal EPA.

National Ambient Air Quality Standards (NAAQS means an ambient air quality standard set by EPA at 40 CFR Part 50 and includes standards for carbon monoxide (CO), particulate matter, ozone (O3), sulfur dioxide (SO2), lead (Pb), and nitrogen dioxide (NO2).

Examples of National Ambient Air Quality Standards (NAAQS in a sentence

• On December 1, 2006, paragraph (A)(3) of OAC rule 3745-31-05 was revised to conform to the Ohio Revised Code (ORC) changes effective August 3, 2006 (Senate Bill 265 changes), such that BAT is no longer required by State regulations for National Ambient Air Quality Standards (NAAQS) pollutant(s) less than ten tons per year.

• Volatile organic compounds (VOC) and Nitrogen Oxides (NOx) are regulated under the Clean Air Act (CAA) for the purposes of attaining and maintaining the National Ambient Air Quality Standards (NAAQS) for ozone.

• The resultant concentrations are within the National Ambient Air Quality Standards (NAAQS).

• Ambient Air Quality Review - An analysis must be completed to ensure the continued maintenance of the National Ambient Air Quality Standards (NAAQS) and that any increases in ambient air pollutant concentrations do not exceed the incremental values set pursuant to the Clean Air Act.

• Locations that do not meet the EPA National Ambient Air Quality Standards (NAAQS) for particulates (PM 10 or PM 2.5) must be equipped with additional filtration on outdoor air intakes as required in ANSI/ASHRAE Standard 62.1. NAAQS information can be found at HTTPS://WWW.EPA.GOV/GREEN-BOOK.

More Definitions of National Ambient Air Quality Standards (NAAQS

National Ambient Air Quality Standards (NAAQS means air quality standards promulgated pursuant to Section 109 of the CAA and its implementing regulations to protect public health and welfare, and consisting of primary and secondary standards. Primary standards are aimed at protecting the public health, while secondary standards are intended to safeguard the public welfare.

National Ambient Air Quality Standards (NAAQS means the

National Ambient Air Quality Standards (NAAQS means the same as defined in Rule

National Ambient Air Quality Standards (NAAQS means standards promulgated by the federal Environmental Protection Agency that specify the maximum acceptable concentrations of pollutants in the ambient air to protect public health with an adequate margin of safety, and to protect public welfare from any known or anticipated adverse effects of such pollutants (e.g., visibility impairment, soiling harm to wildlife or vegetation, materials damage, etc.) in the ambient air.

National Ambient Air Quality Standards (NAAQS means standards promulgated by the federal Environmental Protection Agency that specify the maximum acceptable concentrations of pollutants in the ambient air to protect public health with an adequate

National Ambient Air Quality Standards (NAAQS means maximum allowable ambient air concentrations for specified air contaminants and monitoring periods as established by the federal EPA (see Table 20.1 - 7).TABLE 20.1 - 7 California and National Ambient Air Quality Standards California Standards National Standards Notes to Table 20.1-71. California standards, other than ozone, carbon monoxide, sulfur dioxide (1 hour), nitrogen dioxide, and particulate matter (PM10), are values that are not to be equaled or exceeded. The ozone, carbon monoxide, sulfur dioxide (1 hour), nitrogen dioxide, and particulate matter (PM10) standards are not to be exceeded.2. National standards, other than ozone and those based on annual averages or annual geometric means, are not to be exceeded more than once a year. The ozone standard is attained when the expected number of days per calendar year with maximum hourly average concentrations above standard is equal to or less than one.3. Concentration expressed first in units in which it was promulgated.Equivalent units given in parentheses are based upon a reference temperature of 25oC and a reference pressure of 760 mm of mercury.All measurements of air quality are to be corrected to a reference temperature of 25oC and a reference pressure of 760 mm of mercury(1,013.2 millibar). Ppm in this table refers to ppm by volume or micromoles of pollutant per mole of gas.4. Any equivalent procedure that can be shown to the satisfaction of the Air Resources Board to give equivalent results at or near the level of the air quality standard may be used. 5. National Primary Standards: The levels of air quality necessary, with an adequate margin of safety, to protect the public health. Each state must attain the primary standards within a specified number of years after that state's implementation plan is approved by the Environmental Protection Agency (EPA).6. National Secondary Standards: The levels of air quality necessary to protect the public welfare from any known or anticipated adverse effects of a pollutant. Each state must attain the secondary standards within a "reasonable time" after the implementation plan is approved by the EPA.7. Reference method as described by the EPA: An "equivalent method" of measurement may be used but must have a "consistent relationship to the reference method" and must be approved by the EPA.8. Prevailing visibility is defined as the greatest visibility that is attained or surpassed around at least half of the horizon circle but not necessarily in conti...

National Ambient Air Quality Standards (NAAQS means the allowable concentrations of