04-14367. Air Quality Criteria for Particulate Matter (External Review Draft)

AGENCY:

Environmental Protection Agency (EPA).

ACTION:

Notice of drafts of chapters for public review and comment.

SUMMARY:

On or about June 21, 2004, the National Center for Environmental Assessment (NCEA), within EPA's Office of Research and Development, will make available for public review and comment revised drafts of Chapters 7, 8, and 9 of EPA's document Air Quality Criteria for Particulate Matter, which incorporate revisions made in response to earlier external review of those chapters. Under sections 108 and 109 of the Clean Air Act, the purpose of this document is to provide an assessment of the latest scientific information on the effects of airborne particulate matter (PM) on the public health and welfare for use in EPA's current review of the National Ambient Air Quality Standards (NAAQS) for PM.

DATES:

Comments on the draft chapters must be submitted in writing no later than July 20, 2004. Send the written comments to the Project Manager for Particulate Matter, National Center for Environmental Assessment—RTP (B243-01), U.S. Environmental Protection Agency, Research Triangle Park, NC 27711.

ADDRESSES:

The revised Chapters 7, 8, and 9 of the Air Quality Criteria for Particulate Matter will be available on CD ROM from NCEA-RTP. Contact Ms. Diane Ray by phone [phone]), fax [phone]), or e-mail ([e-mail]) to request these chapters. Please provide the document's title, Air Quality Criteria for Particulate Matter, and the EPA numbers for each of the three revised chapters (EPA/600/P-99/002aE, EPA/600/P-99/002bE), as well as your name and address, to properly process your request. Internet users will be able to download a copy from the NCEA home page. The URL is http://www.epa.gov/​ncea/​. Hard copies of the revised chapters can also be made available upon request.

FOR FURTHER INFORMATION CONTACT:

Dr. Robert Elias, National Center for Environmental Assessment—RTP (B243-01), U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone: [phone]; fax: [phone]; e-mail: [e-mail].

SUPPLEMENTARY INFORMATION:

EPA is in the process of updating and revising, where appropriate, its Air Quality Criteria for Particulate Matter as issued in 1996 (usually referred to as the “Criteria Document”). Sections 108 and 109 of the Clean Air Act require that EPA carry out a periodic review and revision, where appropriate, of the air quality criteria and national ambient air quality standards (NAAQS) for “criteria” air pollutants such as PM. Details of EPA's plans for the review of the NAAQS for PM were initially announced in a previous Federal Register notice (62 FR 55201, October 23, 1997). EPA made a first external review draft of the updated Air Quality Criteria for Particulate Matter available for review by the Clean Air Act Scientific Advisory Committee (CASAC) and members of the public in October 1999 (64 FR 57884, October 27, 1999). Following that public review period and a meeting of the CASAC in December 1999 (64 FR 61875, November 15, 1999), EPA revised the document as appropriate to incorporate CASAC and public comments, as well as to reflect many new studies on the effects of PM that were not available in time for discussion in the first external review draft.

EPA then made a second external review draft of the Air Quality Criteria for Particulate Matter available for CASAC and public review in April 2001 (66 FR 18929, April 12, 2001). Following that public review period and a second CASAC meeting in July 2001 (66 FR 34924, July 2, 2001), EPA again revised the document as appropriate to incorporate changes in response to CASAC and public comments and also made further revisions reflecting new studies on effects of particulate matter that had become available between issuance of the first and second external review drafts.

EPA then made a third external review draft of the Air Quality Criteria for Particulate Matter available for CASAC and public review in May 2002 (67 FR 31303, May 9, 2002). Following that public review period and a third CASAC meeting in July 2002 (67 FR 41723, June 19, 2002), EPA again revised the document as appropriate to incorporate revisions in response to CASAC and public comments and also made further revisions reflecting new studies on effects of particulate matter that had become available between issuance of the second and third external review drafts, as well as re-analyses of certain existing studies occasioned after discovery of problems with applications of statistical software.

EPA made a fourth external review draft available for CASAC and public review in June 2003 (68 FR 36985, June 20, 2003). A public meeting with CASAC was held August 25-26, 2003 (68 FR 47061, August 7, 2003), during which CASAC reached closure on Chapters 1,2,3,4,5, and 6, with only relatively minor final revisions to be made. No further public review is requested on these chapters. However, CASAC did not reach closure on Chapters 7 (toxicology), 8 (epidemiology), and 9 (integrative synthesis), each of which were to be more extensively revised or, in the case of Chapter 9, significantly restructured.

In December 2003, EPA made revised drafts of Chapters 7 and 8 available for CASAC and public review (68 FR 75240, December 30, 2003). These two revised draft chapters were reviewed by CASAC via a publically accessible teleconference call on February 3, 2004 (69 FR 657, January 6, 2004). However, CASAC did not reach closure on Chapters 7 or 8, leading to further revisions of each that are now being released for further public comment and CASAC review.

These three revised draft chapters will be reviewed by CASAC on July 20 and 21, 2004. The date and arrangements for the CASAC meeting were announced in the Federal Register on June 9, 2004 (69 FR 32344).

Dated: June 17, 2004.

Peter W. Preuss,

Director, National Center for Environmental Assessment.