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EPA/OAR RIN: 2060-AV81 Publication ID: Spring 2023 
Title: Revisions to Method 320 
Abstract: This proposed action would update Method 320. The EPA is proposing revisions to streamline the length and language; quality assurance/quality control procedures would be revised to reflect changes in instrumentation and sampling equipment since the original version of this method; and data processing and analysis sections would be updated to reflect evolving software and testing approaches. 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 40 CFR 63    40 CFR 60   
Legal Authority: Clean Air Act   
Legal Deadline:  None
Action Date FR Cite
NPRM  04/00/2024 
Final Rule  11/00/2025 
Additional Information: EPA-HQ-OAR-2022-0491.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
David Nash
Environmental Protection Agency
Office of Air and Radiation
109 TW Alexander Drive,
Research Triangle Park, NC 27701
Phone:919 541-9425