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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. DOE: U.S. Department of Energy EIA: U.S. Energy Information Administration 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 Greenfield: refers to an emission source that is part of a newly constructed facility at a site where no facility had previously existed GW: gigawatts HAP: hazardous air pollutant HNO3: nitric acid HRSG: heat recovery steam generator 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 MW: megawatts 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 American Electric Reliability Council NESHAP: National Emission Standards for Hazardous Air Pollutants NH3: ammonia 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
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