{"data":{"id":"us/40-cfr-1039.805","jurisdiction":"us","citation":"40 CFR 1039.805","heading":"What symbols, acronyms, and abbreviations does this part use?","body":"The following symbols, acronyms, and abbreviations apply to this part:\nCFR Code of Federal Regulations.\nCH4 methane.\nCO carbon monoxide.\nCO2 carbon dioxide.\nDEF Diesel exhaust fluid.\nEEFM Emergency equipment field modification.\nEPA Environmental Protection Agency.\nFEL Family Emission Limit.\ng/kW-hr grams per kilowatt-hour.\nHC hydrocarbon.\nISO International Organization for Standardization (see www.iso.org).\nkW kilowatts.\nN2O nitrous oxide.\nNIST National Institute of Standards and Technology.\nNMHC nonmethane hydrocarbons.\nNOX oxides of nitrogen (NO and NO2).\nNTE not-to-exceed\nPM particulate matter.\nrpm revolutions per minute.\nSAE Society of Automotive Engineers.\nSCR Selective catalytic reduction.\nSEA Selective enforcement audit.\nTHC total hydrocarbon.\nTHCE total hydrocarbon equivalent.\nTRU transportation refrigeration unit.\nU.S.C. United States Code.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1039—CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES","Subpart I—Definitions and Other Reference Information"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"72fdcb1ad78df161f49468baf45db89fa7a428175adb43fe50877b63c441b0a0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1039.801","next":"us/40-cfr-1039.815"},"notice":"GroundRules: Original legal text. Not legal advice."}