Daily Rules, Proposed Rules, and Notices of the Federal Government
EPA is releasing this draft document to seek review by the Clean Air Scientific Advisory Committee (CASAC) and the public (meeting date and location to be specified in a separate Federal Register notice). The draft document does not represent and should not be construed to represent any final EPA policy, viewpoint, or determination. EPA will consider any public comments submitted in response to this notice when revising the document.
Comments may be submitted electronically via
For technical information, contact Dr. James Brown, National Center for Environmental Assessment;
Section 108 (a) of the Clean Air Act directs the Administrator to identify certain pollutants which, among other things, “cause or contribute to air pollution which may reasonably be anticipated to endanger public health or welfare” and to issue air quality criteria for them. These air quality criteria are to “accurately reflect the latest scientific knowledge useful in indicating the kind and extent of all identifiable effects on public health or welfare which may be expected from the presence of [a] pollutant in the ambient air* * *.” Under section 109 of the Act, EPA is then to establish national ambient air quality standards (NAAQS) for each pollutant for which EPA has issued criteria. Section 109 (d) of the Act subsequently requires periodic review and, if appropriate, revision of existing air quality criteria to reflect advances in scientific knowledge on the effects of the pollutant on public health or welfare. EPA is also to revise the NAAQS, if appropriate, based on the revised air quality criteria.
On September 29, 2008 (73 FR 56581), EPA formally initiated its current review of the air quality criteria for ozone, requesting the submission of recent scientific information on specified topics. A draft of EPA's “Integrated Review Plan for the Ozone National Ambient Air Quality Standards Review” (EPA/452/P-09/001) was made available in September 2009 for public comment and was discussed by the CASAC via a publicly accessible teleconference on November 13, 2009 (74 FR 54562). In August 2010, EPA held a workshop with invited scientific experts to discuss initial draft materials prepared in the development of the ISA (75 FR 42085). The first external review draft ISA for Ozone and Related Photochemical Oxidants was released on March 4, 2011 (
The second external review draft “Integrated Science Assessment for Ozone and Related Photochemical Oxidants” will be discussed at a public meeting for review by the CASAC, and public comments received will be provided to the CASAC review panel. A future
Submit your comments, identified by Docket ID No. EPA-HQ-ORD-2011-0050 by one of the following methods:
If you provide comments by mail or hand delivery, please submit three copies of the comments. For attachments, provide an index, number pages consecutively with the comments, and submit an unbound original and three copies.