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EPA/AR RIN: 2060-AQ44 Publication ID: Fall 2010 
Title: ●Review of the National Ambient Air Quality Standards for Lead 
Abstract: Under the Clean Air Act Amendments of 1977, EPA is required to review and if appropriate revise the air quality criteria for the primary (health-based) and secondary (welfare-based) national ambient air quality standards (NAAQS) every 5 years. On November 12, 2008, EPA published a final rule to revise the primary and secondary NAAQS for lead to provide increased protection for public health and welfare. With regard to the primary standard, EPA revised the level to 0.15 micrograms per cubic meter (ug/m3) of lead in total suspended particles and the averaging time to a rolling 3-month period with a maximum (not-to-be-exceeded) form, evaluated over a 3-year period. EPA revised the secondary standard to be identical in all respects to the revised primary standard. EPA has now initiated the next review. The review began in May 2010 with a workshop to discuss key policy-relevant issues around which EPA would structure the review. This review includes the preparation of an Integrated Science Assessment, and if warranted, a Risk/Exposure Assessment and also a Policy Assessment Document by EPA, with opportunities for review by EPA's Clean Air Scientific Advisory Committee and the public. These documents inform the Administrator's proposed decision as to whether to retain or revise the standards. 
Agency: Environmental Protection Agency(EPA)  Priority: Economically Significant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: No 
CFR Citation: 40 CFR 50   
Legal Authority: 42 USC 7408    42 USC 7409   
Legal Deadline:  None

Statement of Need: As established in the Clean Air Act, the national ambient air quality standards for lead are to be reviewed every 5 years.

Summary of the Legal Basis: Section 109 of the Clean Air Act (42 U.S.C. 7409) directs the Administrator to propose and promulgate "primary" and "secondary" national ambient air quality standards for pollutants identified under section 108 (the "criteria" pollutants). The "primary" standards are established for the protection of public health, while "secondary" standards are to protect against public welfare.

Alternatives: The main alternatives for the Administrator's decision on the review of the national ambient air quality standards for lead are whether to retain or revise the existing standards.

Anticipated Costs and Benefits: The Clean Air Act makes clear that the economic and technical feasibility of attaining standards are not to be considered in setting or revising the NAAQS, although such factors may be considered in the development of State plans to implement the standards. Accordingly, the Agency prepares cost and benefit information in order to provide States information that may be useful in considering different implementation strategies for meeting proposed or final standards. Cost and benefit information is not developed to support a NAAQS rulemaking until sufficient policy and scientific information is available to narrow potential options for the form and level associated with any potential revisions to the standard. Therefore, work on developing the plan for conducting the cost and benefit analysis will generally start 1 1/2 to 2 years following the start of a NAAQS review.

Risks: During the course of this review, risk assessments may, as warranted, be conducted to evaluate health and/or environmental risks associated with retention or revision of the lead standards.

Action Date FR Cite
NPRM  12/00/2013    
Final Action  10/00/2014    
Additional Information: EPA Docket information: EPA-HQ-OAR-2010-0108
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State, Tribal 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: Yes 
RIN Information URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Deirdre Murphy
Environmental Protection Agency
Air and Radiation
Research Triangle Park, NC 27709
Phone:919 541-0729
Fax:919 541-0840

Karen Martin
Environmental Protection Agency
Air and Radiation
Research Triangle Park, NC 27711
Phone:919 541-5274
Fax:919 541-0237

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