US lawIdahoRegulationsIDAPA 58 — Environmental Quality, Department ofChapter 58.01.01 — Rules for the Control of Air Pollution in Idaho678IDAPA 58.01.01.678Combinations Of FuelsLast amended: 2023Year: 2026Length: 29 wordsOfficial source When two (2) or more types of fuel are burned concurrently, the allowable emission are determined by proportioning the gross heat input and emission standards for each fuel. (3-28-23)PreviousIDAPA 58.01.01.677NextIDAPA 58.01.01.679