CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER O—COAL MINE SAFETY AND HEALTH (parts 70 to 90) > PART 71—MANDATORY HEALTH STANDARDS—SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES > SUBPART C—Sampling Procedures (§71.201 to §71.220) > 71.210—Respirable dust samples; report to operator; posting.

71.210—Respirable dust samples; report to operator; posting.

(a) The Secretary shall provide the operator with a report of the following data on respirable dust samples as soon as practicable:
(1) The mine identification number;
(2) The designated work position at the mine from which the samples were taken;
(3) The concentration of respirable dust, expressed in milligrams per cubic meter of air, for each valid sample;
(4) The average concentration of respirable dust, expressed in milligrams per cubic meter of air, for all valid samples; and
(5) The reason for voiding any samples.
(b) Upon receipt, the operator shall post this data for at least 31 days on the mine bulletin board.