US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 421 — NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORYSubpart K — Primary Columbium-Tantalum Subcategory421.11140 C.F.R. § 421.111Specialized definitions.Last amended: 2016Year: 2026Length: 32 wordsOfficial source Cite as 40 C.F.R. § 421.111 (2026)For the purpose of this subpart the general definitions, abbreviations, and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. [49 FR 8817, Mar. 8, 1984]Previous40 C.F.R. § 421.110Next40 C.F.R. § 421.112