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Analysis of Strategies for Reducing Multiple Emissions from Power Plants:
Sulfur Dioxide, Nitrogen Oxides, and Carbon Dioxide

Table 4.  Assumed Emission Caps for Electricity Generators in Sensitivity Cases

Case Name

Electric Power Sector Emission Caps

Compliance Dates

RPS Requirement

NOx

SO2

CO2

Hg

SO2 Sensitivity

CAAA90 standards and NOx SIP Call

50% below 1997 level

None

None

Start 2002; meet target by 2005

None

CO2 Sensitivity

CAAA90 standards and NOx SIP Call

CAAA90 cap

7% above 1990 level

None

Start 2002; reach 10% above 1990 CO2 level in 2005 and 7% above 1990 level in 2008-2012

None

Integrated Sensitivity

CAAA90 standards and NOx SIP Call

50% below 1997 level

7% above 1990 level

None

Start 2002; NOx/SO2 targets by 2005; for CO2, reach 10% above 1990 level in 2005 and 7% above 1990 level in 2008-2012

None

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 standards refer to the boiler emission standards for NOx established in Title V of the Clean Air Act Amendments of 1990. NOx SIP Call refers to the 19-State summer season cap on NOx emissions to begin in 2004. The time period for reaching the CO2 target 7 percent above 1990 levels is between 2008 and 2012. The emission caps are phased in gradually until the target cap is met on the specified date.

Source: Office of Integrated Analysis and Forecasting.

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