1.1''This practice describes procedures for collecting a coal sample from a channel extending from top to bottom in the face of a coal seam in a mine.

1.2''Units'''The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3''This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific precautionary information, see Note 2.

1.4''This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.