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EPA/AR RIN: 2060-AP77 Publication ID: Spring 2010 
Title: Revision to Pb Ambient Air Monitoring Requirements 
Abstract: On November 12, 2008, the Environmental Protection Agency (EPA revised the National Ambient Air Quality Standards (NAAQS) for lead (Pb) and associated monitoring requirements. The finalized monitoring requirements require State and local monitoring agencies to conduct Pb monitoring near Pb sources emitting 1 tons per year (tpy) or more and in large urban areas referred to as Core Based Statistical Areas (CBSA) with a population of 500,000 people or more. In January 2009, EPA received a petition to reconsider the 1 tpy emission threshold from the Missouri Coalition for the Environment Foundation, Natural Resources Defense Council, the Coalition to End Childhood Poisoning, and Physicians for Social Responsibility requesting EPA reconsider the 1 tpy emission threshold. EPA granted the petition to reconsider on July 22, 2009. This action represents the results of the EPA's reconsideration of the Pb monitoring requirements. A proposed revision was published on December 30, 2009, in which the EPA proposed to lower the emission threshold to 0.50 tpy, and to require Pb monitoring at the approximately 80 NCore sites instead of monitoring Pb in CBSA's with a population greater than 500,000. The EPA also requested comments on an emission threshold greater than 0.50 tpy, alternative approaches for monitoring Pb near airports, and on staggering the monitoring deployment over 2 years. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 58   
Legal Authority: 42 USC 7403, 7410, 7601(a), 7611, and 7619   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  12/30/2009  74 FR 69050   
NPRM Comment Period End  02/16/2010    
Final Action  11/00/2010    
Additional Information: SAN No. 5370; EPA publication information: NPRM - http://www.regulations.gov/search/Regs/home.html#documentDetail?R=0900006480a74184; EPA Docket information: EPA-HQ-OAR-2006-0735.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: Yes 
RIN Information URL: www.epa.gov/air/lead  
RIN Data Printed in the FR: No 
Agency Contact:
Kevin Cavender
Environmental Protection Agency
Air and Radiation
C304-06,
Research Triangle Park, NC 27711
Phone:919 541-2364
Fax:919 541-1903
Email: cavender.kevin@epamail.epa.gov

Lewis Weinstock
Environmental Protection Agency
Air and Radiation
C304-06,
Research Triangle Park, NC 27711
Phone:919 541-3661
Fax:919 541-1903
Email: weinstock.lewis@epamail.epa.gov