term criteria pollutants derives from the requirement that EPA must describe the characteristics and potential health and welfare effects of these pollutants. It is on the basis of such criteria that NAAQS are set or revised.


EC:

elemental carbon

EPA:

U.S. Environmental Protection Agency

EPRI:

Electric Power Research Institute


FRM:

federal reference method

FTP:

federal test procedure


GAM:

generalized additive model

GLM:

generalized linear model

GIS:

geographic information system


HEI:

Health Effects Institute

HRV:

heart rate variability


IMPROVE:

Interagency Monitoring of Protected Visual Environments


MAPP:

Multiple Air Pollutant Program

Microenvironment:

A three-dimensional space with a volume in which contaminant concentration is spatially uniform during some specific interval


NAAQS:

National Ambient Air Quality Standards

NMHC:

nonmethane hydrocarbon

NH3:

ammonia

NMMAPS:

National Morbidity, Mortality, and Air Pollution Study

NO2:

nitrogen dioxide

NOx:

oxides of nitrogen (NO and NO2)

NRC:

National Research Council


O3:

oxygen

OC:

organic carbon


PM:

particulate matter

PM0.1:

particles less than 0.1 μm in aerodynamic diameter, called ultrafines

PM2.5:

particles less than 2.5 μm in aerodynamic diameter, called fine particles

PM10:

particles less than 10 µm in aerodynamic diameter

PM10-2.5:

particles between 2.5 µm and 10 µm in aerodynamic diameter, called coarse particles

PM10+:

particles greater than 10 µm in aerodynamic diameter (particles not assumed to be respirable)


ROFA:

residual oil fly ash


SAB:

EPA’s Science Advisory Board



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