Estimates of Costs and Cost-Effectiveness

$/Ton NOx

Engine Type HP Range Control Type Capital Cost, $ removed ($/lb.)

Rich-Burn 501-1,000 Prestratified 36,000 300 (0.15)

Rich-Burn 151-300 NSCR catalyst 16,000 1,100 (0.55)

Lean-Burn 50-150 Clean Burn 14,000 1,100 (0.55)

Lean-Burn 301-500 SCR catalyst 120,000 2,500 (1.25)