PARTS PER BILLION (PPB)/PARTS PER MILLION (PPM)


Meaning of PARTS PER BILLION (PPB)/PARTS PER MILLION (PPM) in English

Units commonly used to express contamination ratios, as in establishing the maximum permissible amount of a contaminant in water, land, or air.

Environmental engineering English vocabulary.      Английский словарь экологического инжиниринга.