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EPA/AR RIN: 2060-AO58 Publication ID: Fall 2008 
Title: Amend Methods 201a and 202 To Improve Measurement of PM2.5 
Abstract: This action adds new procedures to two methods required in State Implementation Plans to measure fine PM or PM 2.5 with condensable emissions. Method 201a is amended to add procedures and equipment specifications for use of 2.5 micron size cut cyclone which may be used in conjunction with the current 10 micron size cut cyclone or alone if only PM2.5 is to be measured. Method 202 is amended to add procedures and equipment specifications to be followed when the measurement of fine PM which includes condensable emissions is required. These amendments improve the accuracy and precision of current version of Method 202. 
Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 51 app M   
Legal Authority: Clean Air Act   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  12/00/2008    
Additional Information: SAN No. 5147
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Local, State 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Candace Sorrell
Environmental Protection Agency
Air and Radiation
109 T.W. Alexander Drive, Mail Code E143-02,
Research Triangle Park, NC 27711
Phone:919 541-1064
Fax:919 541-0516
Email: sorrell.candace@epa.gov

Conniesue Oldham
Environmental Protection Agency
Air and Radiation
D205-02, E143-02,
Research Triangle Park, NC 27711
Phone:919 541-7774
Fax:919 541-0516
Email: oldham.conniesue@epa.gov