US lawFederal (United States)RegulationsTitle 40 CFR — Protection of EnvironmentChapter I — ENVIRONMENTAL PROTECTION AGENCYPart 406 — GRAIN MILLS POINT SOURCE CATEGORYSubpart C — Normal Wheat Flour Milling Subcategory406.3140 C.F.R. § 406.31Specialized definitions.Last amended: 2016Year: 2026Length: 32 wordsOfficial source Cite as 40 C.F.R. § 406.31 (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. § 406.30Next40 C.F.R. § 406.32