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| EPA/AR | RIN: 2060-AO48 | Publication ID: Fall 2008 |
| Title: Review of the Primary National Ambient Air Quality Standard for Sulfur Dioxide | |
| Abstract: The Clean Air Act Amendments of 1977 require EPA to review and, if appropriate, revise air quality criteria primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) periodically. On May 22, 1996, the EPA published a final decision under section 109(d)(1) that revisions of the primary and secondary NAAQS for sulfur dioxide (SO2) were not appropriate at that time, aside from several minor technical changes. That action provided the Administrator's final determination, after careful evaluation of comments received on the November 1994 proposal, that significant revisions to the primary and the secondary NAAQS for SO2 would not be made at that time. In 2006, the EPA/ORD initiated the current periodic review of SO2 air quality criteria, the scientific basis for the NAAQS, with a call for information in the Federal Register. (This regulatory action is for the Agency's review of the primary SO2 NAAQS. Review of the secondary SO2 NAAQS will be part of a separate regulatory action combined with review of the secondary nitrogen dioxide NAAQS.) The EPA's ORD and OAR will prepare a plan for the primary SO2 NAAQS review, which will be an integrated plan for addressing policy-relevant scientific and technical issues and will include a schedule of the review. Subsequently, an Integrated Science Assessment (ISA) will be prepared by ORD. This document will be reviewed by the Clean Air Scientific Advisory Committee (CASAC), an independent science advisory committee established to review the scientific and technical basis of the NAAQS, and the public, and will reflect the input received through these reviews. Following completion of the ISA, OAR will prepare and publish an exposure/risk assessment, as appropriate, and an Advance Notice of Proposed Rulemaking (ANPRM), that will include a policy assessment reflecting the Agency's views, based on information in the ISA and the exposure/risk report. As the primary SO2 NAAQS review is completed, the Administrator's proposal to retain or revise the SO2 NAAQS will be published with a request for public comment. Input received during the public comment period will be considered in the Administrator's final decision. | |
| Agency: Environmental Protection Agency(EPA) | Priority: Economically Significant |
| RIN Status: Previously published in the Unified Agenda | Agenda Stage of Rulemaking: Prerule Stage |
| Major: Yes | Unfunded Mandates: No |
| CFR Citation: 40 CFR 50 | |
| Legal Authority: 42 USC 7408 and 7409 | |
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Legal Deadline:
None |
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Timetable:
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| Additional Information: SAN No. 5163; EPA Docket information: EPA-HQ-OAR-2007-0352 | |
| Regulatory Flexibility Analysis Required: No | Government Levels Affected: Federal, Local, State, Tribal |
| Small Entities Affected: No | Federalism: No |
| Included in the Regulatory Plan: No | |
| RIN Data Printed in the FR: No | |
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Agency Contact: Michael Stewart Environmental Protection Agency Air and Radiation C504-06, Research Triangle Park, NC 27711 Phone:919 541-7524 Fax:919 541-0237 Email: stewart.michael@epa.gov Karen Martin Environmental Protection Agency Air and Radiation C504-06, Research Triangle Park, NC 27711 Phone:919 541-5274 Fax:919 541-0237 Email: Martin.Karen@epamail.epa.gov |
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