30 CFR § 71.2
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 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 §71.202 (Certified person;
sampling) to take respirable dust samples required by this part or certified
in accordance with §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 §71.208 (Bimonthly sampling; designated work
(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
(j) Quartz means crystalline silicon dioxide (SiO(sub)2) not
chemically combined with other substances and having a distinctive physical
(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
(o) Surface installation means any structure in which miners
work at a surface coal mine or surface work area of an underground coal
(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
(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.
Subpart B--Dust Standards
AUTHORITY: Secs. 101 and 103(h), Federal Mine Safety and Health Act of 1977, Pub.
L. 91-173 as amended by Pub. L. 95-164, 91 Stat. 1291 and 1299 (30 U.S.C. 811
SOURCE: 45 FR 80757, Dec. 5, 1980, unless otherwise noted.