This Technical Support Document (TSD) describes EPA’s use of the Integrated Planning Model (IPM) to develop estimates of SO₂ and NO_x emission control costs, projections of future emissions and emission reductions, and projections of capacity of future control retrofits, assuming controls on electricity generating units (EGUs). 

View IPM Analysis for the Clean Air Interstate Rule for related information.

• Modeling of Control Costs, Emissions, and Control Retrofits for Cost Effectiveness and Feasibility Analyses (PDF)(13 pp, 36 K, 03/2005)