Channel sample
(3) Channel sample means a sample of coal collected according to ASTM standard D4596-93 from a channel extending from the top to the bottom of a coal seam. (4) Commingled coal means coal from different sources and/or types combined prior to shipment or use. (5) Core sample means a cylindrical sample of coal that represents the thickness of a coal seam penetrated by drilling according to ASTM standard D5192-91. (6) Correction factor means the difference between the equilibrium moisture and the inherent moisture in low rank coals for the purpose of 870.20(a). (7) Equilibrium moisture means the moisture in the coal as determined through ASTM standard D1412-93. (8) High-rank coals means anthracite, bituminous, and subbituminous A and B coals. (9) Low-rank coals means subbituminous C and lignite coals. (10) Slurry pond means any natural or artificial pond or lagoon used for the settlement and draining of the solids from the slurry resulting from the coal washing process. (11) Tipple coal means coal from a mine or loading facility that is ready for shipment.