United States Government Printing Office printer prt distributor dst United States National Archives and Records Administration Federal Register Office author aut Government Organization text government publication eng FR Regulatory Information 1997_register executive 2010-09-24 article Rules and Regulations D09002ee180a40dc1 D09002ee180a40eb0 United States Part II originator org United States Government Agency or Subagency United States Environmental Protection Agency originator org United States Government Agency or Subagency United States Rule originator org United States Government Agency or Subagency United States Environmental Protection Agency originator org United States Government Agency or Subagency This document describes EPA's decision to revise the national ambient air quality standards (NAAQS) for particulate matter (PM) based on its review of the available scientific evidence linking exposures to ambient PM to adverse health and welfare effects at levels allowed by the current PM standards. The current primary PM standards are revised in several respects: Two new PM<INF>2.5</INF> standards are added, set at 15 <greek-m>g/m<SUP>3</SUP> , based on the 3-year average of annual arithmetic mean PM<INF>2.5</INF> concentrations from single or multiple community-oriented monitors, and 65 <greek-m>g/m<SUP> 3</SUP> , based on the 3-year average of the 98<SUP>th</SUP> percentile of 24-hour PM<INF>2.5</INF> concentrations at each population-oriented monitor within an area; and the current 24-hour PM<INF>10</INF> standard is revised to be based on the 99<SUP>th</SUP> percentile of 24-hour PM<INF>10</INF> concentrations at each monitor within an area. The new suite of primary standards will provide increased protection against a wide range of PM-related health effects, including premature mortality and increased hospital admissions and emergency room visits, primarily in the elderly and individuals with cardiopulmonary disease; increased respiratory symptoms and disease, in children and individuals with cardiopulmonary disease such as asthma; decreased lung function, particularly in children and individuals with asthma; and alterations in lung tissue and structure and in respiratory tract defense mechanisms. The current secondary standards are revised by making them identical in all respects to the new suite of primary standards. The new secondary standards, in conjunction with a regional haze program, will provide appropriate protection against PM-related public welfare effects including soiling, material damage, and visibility impairment. In conjunction with the new PM<INF>2.5</INF> standards, a new reference method has been specified for monitoring PM as PM<INF>2.5</INF> . EFFECTIVE DATE: This action is effective September 16, 1997. ADDRESSES: A docket containing information relating to the EPA's review of the PM primary and secondary standards (Docket No. A-95-54) is available for public inspection in the Central Docket Section of the U.S. Environmental Protection Agency, South Conference Center, Rm. 4, 401 M St., SW., Washington, DC. This docket incorporates the docket established for the air quality Criteria Document (Docket No. ECAO-CD- 92-0671). The docket may be inspected between 8 a.m. and 3 p.m., Monday through Friday, except legal holidays, and a reasonable fee may be charged for copying. The information in the docket constitutes the complete basis for the decision announced in this document. For the availability of related information, see ``SUPPLEMENTARY INFORMATION.'' FOR FURTHER INFORMATION CONTACT: John H. Haines, MD-15, Air Quality Strategies and Standards Division, Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone: (919) 541-5533; e-mail: haines.john@epamail.epa.gov. SUPPLEMENTARY INFORMATION: 62 FR 38652 http://www.gpo.gov/fdsys/granule/FR-1997-07-18/97-18577 97-18577 fr18jy97-16 RIN 2060-AE66 6560-50-F AD-FRL-5725-2 http://www.gpo.gov/fdsys/granule/FR-1997-07-18/97-18577/content-detail.html http://www.gpo.gov/fdsys/pkg/FR-1997-07-18/html/97-18577.htm http://www.gpo.gov/fdsys/pkg/FR-1997-07-18/pdf/97-18577.pdf 109 p. 38652 38760 62 FR 38652 Title 40 Part 50 40 CFR Part 50 RIN 2060-AE66 National Ambient Air Quality Standards for Particulate Matter; Federal Register Vol. 62, Issue RULE 97-18577 Part II Environmental Protection Agency Rule ENVIRONMENTAL PROTECTION AGENCY 1997-09-16 AD-FRL-5725-2 6560-50-F 97-18577 Final rule.

This document describes EPA's decision to revise the national ambient air quality standards (NAAQS) for particulate matter (PM) based on its review of the available scientific evidence linking exposures to ambient PM to adverse health and welfare effects at levels allowed by the current PM standards. The current primary PM standards are revised in several respects: Two new PM<INF>2.5</INF> standards are added, set at 15 <greek-m>g/m<SUP>3</SUP> , based on the 3-year average of annual arithmetic mean PM<INF>2.5</INF> concentrations from single or multiple community-oriented monitors, and 65 <greek-m>g/m<SUP> 3</SUP> , based on the 3-year average of the 98<SUP>th</SUP> percentile of 24-hour PM<INF>2.5</INF> concentrations at each population-oriented monitor within an area; and the current 24-hour PM<INF>10</INF> standard is revised to be based on the 99<SUP>th</SUP> percentile of 24-hour PM<INF>10</INF> concentrations at each monitor within an area. The new suite of primary standards will provide increased protection against a wide range of PM-related health effects, including premature mortality and increased hospital admissions and emergency room visits, primarily in the elderly and individuals with cardiopulmonary disease; increased respiratory symptoms and disease, in children and individuals with cardiopulmonary disease such as asthma; decreased lung function, particularly in children and individuals with asthma; and alterations in lung tissue and structure and in respiratory tract defense mechanisms. The current secondary standards are revised by making them identical in all respects to the new suite of primary standards. The new secondary standards, in conjunction with a regional haze program, will provide appropriate protection against PM-related public welfare effects including soiling, material damage, and visibility impairment. In conjunction with the new PM<INF>2.5</INF> standards, a new reference method has been specified for monitoring PM as PM<INF>2.5</INF> . EFFECTIVE DATE: This action is effective September 16, 1997. ADDRESSES: A docket containing information relating to the EPA's review of the PM primary and secondary standards (Docket No. A-95-54) is available for public inspection in the Central Docket Section of the U.S. Environmental Protection Agency, South Conference Center, Rm. 4, 401 M St., SW., Washington, DC. This docket incorporates the docket established for the air quality Criteria Document (Docket No. ECAO-CD- 92-0671). The docket may be inspected between 8 a.m. and 3 p.m., Monday through Friday, except legal holidays, and a reasonable fee may be charged for copying. The information in the docket constitutes the complete basis for the decision announced in this document. For the availability of related information, see ``SUPPLEMENTARY INFORMATION.'' FOR FURTHER INFORMATION CONTACT: John H. Haines, MD-15, Air Quality Strategies and Standards Division, Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone: (919) 541-5533; e-mail: haines.john@epamail.epa.gov. SUPPLEMENTARY INFORMATION:

This action is effective September 16, 1997. John H. Haines, MD-15, Air Quality Strategies and Standards Division, Office of Air Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone: (919) 541-5533; e-mail: haines.john@epamail.epa.gov. SUPPLEMENTARY INFORMATION: Vol. 62, no. 138 Office of the Federal Register, National Archives and Records Administration 1997-07-18 continuing daily deposited born digital 445 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 http://www.gpo.gov/fdsys/pkg/FR-1997-07-18 P0b002ee180a40c45 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr18jy97 http://www.gpo.gov/fdsys/pkg/FR-1997-07-18/content-detail.html http://www.gpo.gov/fdsys/pkg/FR-1997-07-18/pdf/FR-1997-07-18.pdf fdlp 38421 38896 DGPO 2010-07-15 2010-07-15 FR-1997-07-18 machine generated eng FR FR-1997-07-18 62 138