Term of the Road Dictionary

exceedance

  • Language : PIARC Road Dictionary / English
  • Theme : Environment Environmental Protection
  • Definition : Concentration of an air pollutant that exceeds a standard or criteria, perhaps over a period of time. Note: for air quality standards an exceedance is a concentration greater than the standard value; for air quality bands an exceedance is a concentration greater than, or equal to, the upper band threshold.

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