EPA:

U.S. Environmental Protection Agency, the agency that implements the Clean Air Act.

ERP:

equipment replacement provision

ESP:

electrostatic precipitator


FCCU:

fluid catalytic cracking unit

FGD:

flue gas desulfurization


HAP:

hazardous air pollutant

HRSG:

heat recovery steam generator

HNO3:

nitric acid

H2S:

hydrogen sulfide


IECM:

Integrated Environmental Control Model

IGCC:

integrated gasification combined cycle

IPM:

Integrated Planning Model


LAER:

lowest achievable emission rate (This is the level of control required to obtain a Part D NSR permit.)

LCA:

life-cycle assessment

LNB:

low-NOx burners


MACT:

maximum available control technology


NAAQS:

National Ambient Air Quality Standards (Many of the mechanisms of the Clean Air Act are aimed at attaining and maintaining compliance with these standards.)

NaOH:

sodium hydroxide

Na2S:

sodium sulfide

NEI:

National Emissions Inventory

NEMS:

National Energy Modeling System

NERC:

National Electric Reliability Council

N2O:

nitrous oxide

N2O4:

dinitrogen tetroxide

N2O5:

dinitrogen pentoxide

NO:

nitric oxide

NO2:

nitrogen dioxide

NO3:

nitrogen trioxide

NOx:

nitrogen oxides

NOy:

sum of NOx and other oxidized compounds

NPRA:

National Petrochemical and Refiners Association

NRC:

National Research Council

NSPS:

new source performance standard



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