[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR77]

[Page 625]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 77_MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK 
AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
                     Subpart C_Surface Installations
 
Sec.  77.201-2  Methane accumulations; change in ventilation.

    If, at any time, the air in any structure, enclosure or other 
facility contains 1.0 volume per centum or more of methane changes or 
adjustments in the ventilation of such installation shall be made at 
once so that the air shall contain less than 1.0 volume per centum of 
methane.