The analysis presented in this document supports the EPA’s Final Cross-State Air Pollution Rule Update for the 2008 Ozone National Ambient Air Quality Standards (CSAPR Update). In developing the CSAPR Update, the EPA considered all NO_X control strategies that are widely in use by EGUs. This Technical Support Document (TSD) discusses costs, emission reduction potential, and feasibility related to these EGU NO_X emission control strategies.

Specifically, this TSD explores four topics:

1.   the appropriate representative cost resulting from “widespread” implementation of a particular NOX emission control technology;
2.   the NO_X emission rates commonly achievable by “fully operating” emission control equipment; and
3.   the time required to implement these EGU NO_X control strategies (e.g., installing and/or restoring an emission control system to full operation or shifting generation to reduce NO_X emissions). These analyses inform the EPA’s evaluation of costs and emission reductions with the Integrated Planning Model (IPM) v 5.15 and compliance feasibility for the CSAPR Update.

• EGU NOX Mitigation Strategies Final Rule TSD (PDF)(18 pp, 511 K)