[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: 30CFR71.210] [Page 443] 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 C_Sampling Procedures Sec. 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.