Steamships are powered by old, inefficient steam boilers. Voluntary replacement of these boilers with modern fuel-efficient marine diesel engines will result in reductions of particulate matter and sulfur oxides, even while the replacement diesel engines are operated on higher sulfur residual fuel, and will provide human health and welfare benefits for the people who live in the Great Lakes region. Conversion to new diesel engines will also result in considerable carbon dioxide reductions and fuel savings.
If no adverse comment is received, the rule is effective on March 19, 2012 without further notice. If EPA receives adverse comment by February 17, 2012, it will publish a timely withdrawal in the Federal Register informing the public that the rule will not take effect.