US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 436 — MINERAL MINING AND PROCESSING POINT SOURCE CATEGORYSubpart E — Gypsum Subcategory436.5140 C.F.R. § 436.51Specialized definitions.Last amended: 2016Year: 2026Length: 32 wordsOfficial source Cite as 40 C.F.R. § 436.51 (2026)For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in part 401 of this chapter shall apply to this subpart.Previous40 C.F.R. § 436.50Next40 C.F.R. § 436.52