30 C.F.R. § 90.208 Bimonthly sampling.
Title 30 - Mineral Resources
(a) Each operator shall take one valid respirable dust sample for each part 90 miner during each bimonthly period beginning with the bimonthly period of February 1, 1981. The bimonthly periods are:
February 1–March 31 April 1–May 31 June 1–July 31 August 1–September 30 October 1–November 30 December 1–January 31. (b) When the respirable dust standard is changed in accordance with §90.101 (Respirable dust standard when quartz is present), respirable dust sampling of part 90 miners shall begin on the first shift on which the miner is performing normal work duties during the next bimonthly period following notification of such change from MSHA. (c) Upon issuance of a citation for a violation of §90.100 (Respirable dust standard) or §90.101 (Respirable dust standard when quartz is present), paragraphs (a) and (b) of this section shall not apply to that part 90 miner until the violation is abated in accordance with §90.201(d) (Sampling; general requirements).
Title 30: Mineral Resources
PART 90—MANDATORY HEALTH STANDARDS—COAL MINERS WHO HAVE EVIDENCE OF THE DEVELOPMENT OF PNEUMOCONIOSIS
Subpart C—Sampling Procedures
§ 90.208 Bimonthly sampling.
