This work is to remove references to D3177 (old sulfur standard) from D388, since D3177 is no longer on the books. D4239 (new sulfur standard) has replaced D3177 among D05 standards, and D4239 has previously been added to D388 as well. Removal of D3177 from D388 will complete the transition to the new D4239 standard within D388.
Keywordsanthracite; bituminous; coal; lignite; rank; Classification (standards); Coal products; Coal sampling systems; Lignite; Rank; Sub-bituminous coal;
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