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§ 1857C-3. Air quality criteria and control techniques. 



(a) Air pollutant list; publication and revision by 

 Administrator; issuance of air quality criteria for 

 air pollutants. 



(1) For the purpose of establishing national 

 primary and secondary ambient air quality stand- 

 ards, the Administrator shall within 30 days after 

 December 31, 1970, publish, and shall from time to 

 time thereafter revise, a list which includes each air 

 pollutant — 



(A) which in his judgment has an adverse af- 

 fect on public health or welfare; 



(B) the presence of which In the ambient air 

 results from numerous or diverse mobile or sta- 

 tionary sources; and 



(C) for which air quality criteria had not been 

 Issued before December 31, 1970 but for which he 

 plans to issue air quality criteria under this section. 



(2) The Administrator shall issue air quality cri- 

 teria for an air pollutant within 12 months after he 

 has included such pollutant in a list under para- 

 graph (1). Air quality criteria for an air pollutant 

 shall accurately reflect the latest scientific knowl- 

 edge useful in indicating the kind and extent of all 

 identifiable effects on public health or welfare which 

 may be expected from the presence of such pollutant 

 In the ambient air, in varying quantities. The criteria 

 for an air pollutant, to the extent practicable, shall 

 include information on — 



(A) those variable factors (including atmos- 

 pheric conditions) which of themselves or in com- 

 bination with other factors may alter the effects 

 on public health or welfare of such air pollutant; 



(B) the types of air pollutants which, when 

 present in the atmosphere, may Interact with such 

 pollutant to produce an adverse effect on public 

 health or welfare; and 



(C) any known or anticipated adverse effects 

 on welfare. 



(b) Issuance by Administrator of information on air 

 pollution control techniques; standing consulting 

 committees for air pollutants; establishment; 

 membership. 



(1) Simultaneously with the issuance of criteria 

 under subsection (a) of this section, the Admin- 

 istrator shall, after consultation with appropriate 

 advisory committees and Federal departments and 

 agencies, issue to the States and appropriate air pol- 

 lution control agencies information on air pollution 

 control techniques, which information shall include 

 data relating to the technology and costs of emis- 

 sion control. Such information shall Include such 

 data as are available on available technology and 

 alternative methods of prevention and control of air 

 pollution. Such information shall also include data 

 on alternative fuels, processes, and operating meth- 

 ods which will result in elimination or significant 

 reduction of emissions. 



(2) In order to assist In the development of in- 

 formation on pollution control techniques, the Ad- 

 ministrator may establish a standing consulting com- 

 mittee for each air pollutant included In a list pub- 

 lished pursuant to subsection (a) (1) of this section, 

 which shall be comprised of technically qualified in- 



dividuals representative of State and local govern- 

 ments, industry, and the academic community. Each 

 such committee shall submit, as appropriate, to 

 the Administrator information related to that re- 

 quired by paragraph (1). 



(c) Review, modification, and reissuance by Admin- 

 istrator. 



The Administrator shall from time to time review, 

 and, as appropriate, modify, and reissue any criteria 

 or information on control techniques issued pur- 

 suant to this section. 



(d) Publication in Federal Register; availability of 

 copies for general public 



The issuance of air quality criteria and informa- 

 tion on air pollution control techniques shall be an- 

 nounced in the Federal Register and copies shall be 

 made available to the general public. (July 14, 1955, 

 ch. 360, title I. § 108, as added Dec. 31, 1970, Pub. L. 

 91-604. § 4(a). 84 Stat. 1678.) 



§ 1857C-4. National primary and secondary ambient air 

 quality standards; promulgation; procedure. 



(a)(1) The Administrator — 



(A) within 30 days after December 31, 1970, shall 

 publish proposed regulations prescribing a na- 

 tional primary ambient air quality standard and a 

 national secondary ambient air quality standard 

 for each air pollutant for which air quality criteria 



• have been issued prior to such date; and 



(B) after a reasonable time for interested per- 

 sons to submit written comments thereon (but no 

 later than 90 days after the initial publication of 

 such proposed standards) shall by regulation 

 promulgate such proposed national primary and 

 secondary ambient air quality standards with such 

 modifications as he deems appropriate. 



(2) With respect to any air pollutant for which 

 air quality criteria are issued after December 31, 

 1970, the Administrator shall publish, simultane- 

 ously with the issuance of such criteria and informa- 

 tion, proposed national primary and secondary am- 

 bient air quality standards for any such pollutant. 

 The procedure provided for in paragraph (1) (B) of 

 this subsection shall apply to the promulgation of 

 such standards. 



(b)(1) National primary ambient air quality 

 standards, prescribed under subsection (a) of this 

 section shall be ambient air quality standards the 

 attainment and maintenance of which in the judg- 

 ment of the Administrator, based on such criteria and 

 allowing an adequate margin of safety, are requisite 

 to protect the public health. Such primary stand- 

 ards may be revised in the same manner as 

 promulgated. 



(2) Any national secondary ambient air quality 

 standard prescribed under subsection (a) of this sec- 

 tion shall specify a level of air quality the attain- 

 ment and maintenance of which in the judgment 

 of the Administrator, based on such criteria, is req- 

 uisite to protect the public welfare from any known 

 or anticipated adverse effects associated with the 

 presence of such air pollutant in the ambient air. 

 Such secondary standards may be revised in the same 



