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DOL/MSHA RIN: 1219-AC10 Publication ID: 2026 
Title: Improving and Eliminating Regulations; Limit of Exposure to Diesel Particulate Matter in Underground Metal and Nonmental Mines 
Abstract:

The Mine Safety and Health Administration (MSHA) proposes to revise 30 CFR part 57 by removing outdated requirements for miners' exposures to diesel particulate matter in underground metal and nonmental mines.  These revisions would streamline the requirements for diesel particulate matter for underground metal and nonmetal mine operators while maintaining the same level of protections for miners.  The NPRM was published on July 1, 2025.

 
Agency: Department of Labor(DOL)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
EO 14192 Designation: Deregulatory 
CFR Citation: 30 CFR 57.5060   
Legal Authority: 30 U.S.C. 811   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  07/01/2025  90 FR 28403   
NPRM Comment Period End  07/31/2025 
Final Rule  07/00/2026 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Jessica Senk
Acting Director, Office of Standards, Regulations, and Variances
Department of Labor
Mine Safety and Health Administration
200 Constitution Avenue NW,
Washington, DC 20210
Phone:202 693-9440
Fax:202 693-9441
Email: senk.jessica@dol.gov