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EPA/OW RIN: 2040-AG37 Publication ID: Fall 2024 
Title: Clean Water Act Methods Update Rule for the Analysis of Contaminants in Effluent 
Abstract:

The EPA regularly promulgates updates to the table of approved Clean Water Act monitoring methods at 40 CFR 136.3. This methods update rule (MUR) considers adding new methods and analytes to the 40 CFR part 136.3 tables. These include multi-laboratory validated EPA methods for per- and polyfluorinated alkyl substances (PFAS), a method defined parameter for adsorbable organic fluorine, the promulgation of which in 40 CFR 136.3 will support the Organic Chemicals, Plastics, and Synthetic Fibers Effluent Limitations Guidelines and Standards (40 CFR part 414) rulemaking to address PFAS discharges from facilities manufacturing PFAS. The MUR also considers adding a method for poly-chlorinated biphenyl (PCB) congeners (a more accurate substitute for PCB Aroclors). The rule may also include other parameters proposed by Voluntary Consensus Standard Bodies (VCSB) as is consistent with the National Technology Transfer Act. These VCSB methods are most likely proposing a PFAS method, peracetic acid, and hydrogen peroxide; assuming the VCSB provides adequate validation data. The EPA is not considering method revisions or Alternate Test Procedures that would be addressed more routinely in a routine MUR.

 
Agency: Environmental Protection Agency(EPA)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: No 
CFR Citation: 40 CFR 136.3   
Legal Authority: 33 U.S.C. sec. 1314(h)    33 U.S.C. sec. 1251 et seq.   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  12/00/2024 
Final Rule  03/00/2026 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Federal, Local, State, Tribal 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Adrian Hanley
Environmental Protection Agency
Office of Water
Mail Code 4303T, 1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 564-1564
Email: hanley.adrian@epa.gov

Kevin Tingley
Environmental Protection Agency
Office of Water
1200 Pennsylvania Avenue NW,
Washington, DC 20460
Phone:202 564-4619
Email: tingley.kevin@epa.gov