[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR71.100]

[Page 429-430]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 71--MANDATORY HEALTH STANDARDS--SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
                        Subpart B--Dust Standards
 
Sec. 71.100  Respirable dust standard.

    Authority: Secs. 101 and 103(h), Federal Mine Safety and Health Act 
of 1977, Pub. L.

[[Page 430]]

91-173 as amended by Pub. L. 95-164, 91 Stat. 1291 and 1299 (30 U.S.C. 
811 and 813(h)).

    Source: 45 FR 80757, Dec. 5, 1980, unless otherwise noted.


    Each operator shall continuously maintain the average concentration 
of respirable dust in the mine atmosphere during each shift to which 
each miner in the active workings is exposed at or below 2.0 milligrams 
of respirable dust per cubic meter of air. Concentrations shall be 
measured with an approved sampling device and expressed in terms of an 
equivalent concentration determined in accordance with Sec. 71.206 
(Approved sampling devices; equivalent concentrations).