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EPA/AR

RIN: 2060-AN83

Publication ID: Spring 2009

Title: Review of the National Ambient Air Quality Standards for Lead
Abstract: On October 5, 1978 the EPA promulgated primary and secondary National Ambient Air Quality Standards (NAAQS) for lead under section 109 of the Clean Air Act (43 FR 46258). Both primary (health based) and secondary (welfare) standards were set at a level of 1.5 µg/m3 as a quarterly average (maximum arithmetic mean averaged over a calendar quarter). Subsequent to this initial standard-setting, the Clean Air Act requires that the standard be reviewed periodically. The last such review occurred during the period 1986-1990. For that review, an Air Quality Criteria Document (AQCD) was completed in 1986 with a supplement in 1990. Based on information contained in the AQCD, an EPA Staff Paper and Exposure Assessment were prepared. Following the completion of these documents, the agency did not propose any revisions to the 1978 Pb NAAQS. The current review of the Pb air-quality criteria was initiated in November 2004 by EPA's National Center for Environmental Assessment (NCEA) with a general call for information published in the Federal Register. In January 2005, NCEA released a work plan for the review and revision of the Pb AQCD. Workshops were held to provide author feedback on a developing draft of the AQCD in August 2005. The final AQCD was released October 1, 2006. The EPA Office of Air Quality Planning and Standards prepared a draft Staff Paper for the Administrator, which included an initial evaluation of the key studies and scientific information contained in the AQCD and additional preliminary technical analyses. Drafts of the AQCD and the draft Staff Paper were reviewed by the Clean Air Scientific Advisory Committee (CASAC) and the public. A final Staff Paper was completed on November 1, 2007. An ANPRM was published in December 2007 outlining the results of the final risk assessment and giving consideration to the policy assessment. The Administrator's proposal to revise the lead NAAQS was published on May 20, 2008, with a request for public comment. Input received during the public comment period was considered in the Administrator's final decision which was published on November 12, 2008.
Agency: Environmental Protection Agency(EPA)	Priority: Economically Significant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Completed Actions
Major: Yes	Unfunded Mandates: No
CFR Citation: 40 CFR 50
Legal Authority: 42 USC 7408 42 USC 7409

Legal Deadline:

Action	Source	Description	Date
Final	Judicial	As per July 1, 2008 order	10/15/2008
NPRM	Judicial	As per 5/14/2005 order	05/01/2008

Timetable:

Action	Date	FR Cite
ANPRM	12/17/2007	72 FR 71488
NPRM	05/20/2008	73 FR 29184
Final Action	11/12/2008	73 FR 66964
Final Action; Correction	12/19/2008	73 FR 77517

Additional Information: SAN No. 5059; EPA publication information: NPRM - http://www.epa.gov/fedrgstr/EPA-AIR/2008/May/Day-20/a10808a.pdf; EPA Docket information: EPA-HQ-OAR-2006-0735
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
Agency Contact: Deirdre Murphy Environmental Protection Agency Air and Radiation C539-02, Research Triangle Park, NC 27709 Phone:919 541-0729 Fax:919 541-0840 Email: murphy.deirdre@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