ABSTRACT
Process Network. NAERG — See North America Emergency Response
Guidebook. NAFTA — Acronym for North American Free Trade
Agreement. NAIC Code — See North American Industrial Classifi-
cation Codes. NAMS — Acronym for National Air Monitoring Station. NANB — Acronym for non-A, non-B hepatitis. nano-(n) — A prefix in the metric system representing
10-9. nanocurie (nCi) — A unit of radiation equal to one bil-
lionth (10-9) of a curie. nanogram (ng) — A unit of weight equal to one billionth
(10-9) of a gram. nanograms per cubic meter — A unit of weight equal
to one billionth (10-9) of a gram of a substance in a cubic meter of air, soil, or water.
