Overall Confidence:
An Overall Confidence: is EPA has assigned an overall confidence level for each pollutant based on consideration of the combined uncertainties from emissions estimation, ambient concentration modeling, and exposure modeling. More information on how EPA assigned this cumulative confidence level is available elsewhere in this Web site.
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Background concentrations: | ■■■■■■ |
A Background concentrations: is In this context, EPA uses background concentrations to mean the contributions . . . Read More | |
National Air Toxics Assessment (NATA) | ■■■■■ |
National Air Toxics Assessment (NATA) : A National Air Toxics Assessment (NATA) is EPA's ongoing comprehensive . . . Read More | |
Primary NAAQS | ■■■■■ |
Primary NAAQS: Primary National Ambient Air Quality Standards (NAAQS) in the environmental context refer . . . Read More | |
Confidence coefficient | ■■■■■ |
Confidence coefficient: A confidence coefficient is "The Probability statement that accompanies a confidence . . . Read More | |
Ambient Measurement | ■■■■■ |
An Ambient Measurement is a measurement of the Concentration of a substance or Pollutant within the immediate . . . Read More | |
Hazardous Air Pollutant Exposure Model | ■■■■■ |
Hazardous Air Pollutant Exposure Model : The Hazardous Air Pollutant Exposure Model, Version 4 (HAPEM4) . . . Read More | |
Action Level | ■■■■ |
The term action level refers to a specific level of concentration of a toxic substance, contaminant or . . . Read More | |
Global Climate Change | ■■■■ |
A Global Climate Change could result in sea level rises, changes to patterns of precipitation, increased . . . Read More | |
Monitoring | ■■■■ |
A monitoring is In EMAP, the periodic collection of data that is used to determine the condition of ecological . . . Read More | |
Criteria Pollutants | ■■■■ |
Criteria Pollutants are the 1970 amendments to the Clean Air Act required EPA to set National Ambient . . . Read More |