Analysis of Strategies for Reducing Multiple Emissions from Electric Power Plants: Sulfur Dioxide, Nitrogen Oxides, Carbon Dioxide, and Mercury and a Renewable Portfolio Standard - Table 4. National Energy Modeling System Energy Activities

Table 1. Reference and Analysis Cases

Case Name	Electric Power Sector Emissions Caps				Compliance Date/Other	RPS Requirement
Case Name	NO_x	SO₂	CO₂	Hg	Compliance Date/Other	RPS Requirement
Reference	CAAA90 standards and NO_x SIP Call	CAAA90 cap (8.95 million tons)	None	None	CAAA90	Current State programs^a
NO_x 2008	75% below 1997 level	CAAA90 cap (8.95 million tons)	None	None	Start 2002; meet target by 2008	Current State programs
SO₂ 2008	CAAA90 standards and NO_x SIP Call	75% below 1997 level	None	None	Start 2002; meet target by 2008	Current State programs
CO₂ 1990-7% 2008	CAAA90 standards and NO_x SIP Call	CAAA90 cap (8.95 million tons)	7% below 1990 level	None	Start 2002; meet CO₂ 1990 level by 2008, 7% below 1990 level in 2008-2012^b	Current State programs
Hg 5-Ton	CAAA90 standards and NO_x SIP Call	CAAA90 cap (8.95 million tons)	None	90% below 1997 level	2008	Current State programs
RPS 20%	CAAA90 standards and NO_x SIP Call	CAAA90 cap (8.95 million tons)	None	None	CAAA90	5% 2005, 10% 2010, 20% 2020
Integrated Cases
Integrated NO_x, SO₂, CO₂ 1990	75% below 1997 level	75% below 1997 level	1990 level	None	Start 2002; meet targets by 2008	Current State programs
Integrated NO_x, SO₂, CO₂ 1990, Hg	75% below 1997 level	75% below 1997 level	1990 level	90% below 1997 level	Start 2002; meet NO_x/SO₂/CO₂ targets by 2008; Hg 2008	Current State programs
Integrated All CO₂ 1990	75% below 1997 level	75% below 1997 level	1990 level	90% below 1997 level	Start 2002; meet NO_x/SO₂/CO₂ targets by 2008; Hg 2008	5% 2005, 10% 2010, 20% 2020
Integrated NO_x, SO₂, CO₂ 1990-7%	75% below 1997 level	75% below 1997 level	7% below 1990 level	None	Start 2002; meet NO_x/SO₂ targets by 2008; meet CO₂ 1990 level by 2008, 7% below 1990 level in 2008-2012^b	Current State programs
Integrated NO_x, SO₂, CO₂ 1990-7%, Hg	75% below 1997 level	75% below 1997 level	7% below 1990 level	90% below 1997 level	Start 2002; meet NO_x/SO₂ targets by 2008; meet CO₂ 1990 level by 2008, 7% below 1990 level in 2008-2012;^b Hg 2008	Current State programs
Integrated All CO₂ 1990-7%	75% below 1997 level	75% below 1997 level	7% below 1990 level	90% below 1997 level	Start 2002; meet NO_x/SO₂ targets by 2008; meet CO₂ 1990 level by 2008, 7% below 1990 level in 2008-2012;^b Hg 2008	5% 2005, 10% 2010, 20% 2020
^aThe impacts of current State RPS programs are estimated off line and input as new plant construction. ^bThe CO₂ emission cap remains at the 1990-7% level from 2012 through 2020. Notes: CAAA90 cap refers to the 8.95 million ton SO₂ cap established in Title IV of the Clean Air Act Amendments of 1990 (CAAA90). CAAA90 standards refer to the boiler emission standards for NO_x established in Title V of the CAAA90. NO_x SIP Call refers to the 19-State summer season cap on NO_x emissions to begin in 2004. Integrated refers to combinations of emissions caps and/or a renewable portfolio standard (RPS). Source: See requesting letters in Appendix A for specific cases requested by the Subcommittee.

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