NA ID # – North American Identification Number (refers to four-digit codes that represent a proper shipping name of a hazardous material, used only in U.S., recognized in Canada; not for international use)
NOS or N.O.S. – not otherwise specified (refers to generic hazardous materials)
RQ – Reportable Quantity. Refers to materials designated as hazardous substances by EPA and regulated by DOT when transported in excess of certain threshold quantities that are defined in Tables 1 and 2 to Appendix A of 49 CFR 172.101.
SP or DOT-SP – U.S. DOT Special Permit, an alternative way to comply with regulations
UN ID # – United Nations Identification Number (refers to four-digit codes that represent an internationally recognized proper shipping name of a hazardous material)
VOCs – Volatile Organic Compounds – emissions or vapors from petroleum products
Agencies & Organizations
DOT or U.S. DOT – United States Department of Transportation
EPA – Environmental Protection Agency
FMCSA – Federal Motor Carrier Safety Administration
GPO – Government Printing Office
IATA – International Air Transport Association – refers to both the organization and its regulations for air transport
ICAO – International Civil Aviation Organization – refers to both the organization and its regulations for air transport
IMDG – International Maritime Dangerous Goods Code
IMO – International Maritime Organization
MARAD – Maritime Administration
OSHA – Occupational Safety and Health Administration
PHMSA – Pipeline and Hazardous Materials Safety Administration
TC – Transport Canada
TDG – Transport Dangerous Goods Code – the Canadian hazmat transportation regulations
TSB – Canadian Transportation Safety Board
USCG – United States Coast Guard
Rulemaking Terms
ANPRM – Advanced Notice of Proposed Rulemaking
EO – Emergency Order
FR – Final Rule or Federal Register, depending upon how it is used
MAP-21 – Moving Ahead for Progress in the 21st Century – a collection of requirements set forth by the U.S. Congress, which mandates that the agencies of DOT must implement certain new procedures or requirements, among other things, by a specific date.
