[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: 30CFR71.2]

[Page 428-429]
 
                       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 A--General
 
Sec. 71.2  Definitions.

    For the purpose of this part 71, the term:
    (a) Act means the Federal Mine Safety and Health Act of 1977, Pub. 
L. 91-173, as amended by Pub. L. 95-164.
    (b) Active workings means any place in a surface coal mine or the 
surface

[[Page 429]]

work area of an underground coal mine where miners are normally required 
to work or travel.
    (c) Certified person means an individual certified by the Secretary 
in accordance with Sec. 71.202 (Certified person; sampling) to take 
respirable dust samples required by this part or certified in accordance 
with Sec. 71.203 (Certified person; maintenance and calibration) to 
perform the maintenance and calibration of respirable dust sampling 
equipment as required by this part.
    (d) Concentration means a measure of the amount of a substance 
contained per unit volume of air.
    (e) Designated work position means a work position designated under 
Sec. 71.208 (Bimonthly sampling; designated work positions).
    (f) District Manager means the manager of the Coal Mine Safety and 
Health District in which the mine is located.
    (g) MRE instrument means the gravimetric dust sampler with a four 
channel horizontal elutriator developed by the Mining Research 
Establishment of the National Coal Board, London, England.
    (h) MSHA means the Mine Safety and Health Administration of the 
Department of Labor.
    (i) Normal work shift means (1) a shift during which the regular 
duties of the designated work position are performed while routine day-
to-day mining activities are occurring in the rest of the mine and (2) a 
shift during which there is no rain, or, if rain occurs, the rain does 
not suppress the respirable dust to the extent that sampling results 
will be measurably lower, in the judgment of the person certified under 
this part to conduct sampling.
    (j) Quartz means crystalline silicon dioxide (SiO2) not 
chemically combined with other substances and having a distinctive 
physical structure.
    (k) Respirable dust means dust collected with a sampling device 
approved by the Secretary and the Secretary of Health and Human Services 
in accordance with part 74 (Coal Mine Dust Personal Sampler Units) of 
this title. Sampling device approvals issued by the Secretary of the 
Interior and Secretary of Health, Education and Welfare are continued in 
effect.
    (l) Secretary means the Secretary of Labor or a delegate.
    (m) Surface area means a specific physical portion of a surface coal 
mine or surface area of an underground coal mine. These areas are 
assigned a four digit identification number by MSHA.
    (n) Surface coal mine means a surface area of land and all 
structures, facilities, machinery, tools, equipment, excavations, and 
other property, real or personal, placed upon or above the surface of 
such land by any person, used in, or to be used in, or resulting from, 
the work of extracting in such area bituminous coal, lignite, or 
anthracite from its natural deposits in the earth by any means or 
method, and the work of preparing the coal so extracted, including 
custom coal preparation facilities.
    (o) Surface installation means any structure in which miners work at 
a surface coal mine or surface work area of an underground coal mine.
    (p) Surface work area of an underground coal mine means the surface 
areas of land and all structures, facilities, machinery, tools, 
equipment, shafts, slopes, excavations, and other property, real or 
personal, placed in, upon or above the surface of such land by any 
person, used in, or to be used in, or resulting from, the work of 
extracting bituminous coal, lignite, or anthracite from its natural 
deposits underground by any means or method, and the work of preparing 
the coal so extracted, including custom coal preparation facilities.
    (q) Surface worksite means any area in which miners work at a 
surface coal mine or surface work area of an underground coal mine.
    (r) Valid respirable dust sample means a respirable dust sample 
collected and submitted as required by this part, and not voided by 
MSHA.
    (s) Work position means an occupation identified by an MSHA code 
number describing a location to which a miner is assigned in the 
performance of his or her normal duties.