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Design Value
The monitored reading used by EPA to determine an area's air quality status; e.g., for ozone, the fourth highest reading measured over the most recent three years is the design value.
Source: Terms of the Environment ...
Design Value: The pollutant concentration used by air quality managers as the basis for determining attainment of an air quality standard, generally by using an air quality model.
 See also: Monitor, Air quality, Air, Commercial, Compounds
  
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