Technical Analysis - Part I
CO Impact of Winter Oxygen Rescission
- The addition of oxygen to fuels results in a 5-10% decrease in CO concentrations
- Degradation without oxygen requirement would increase CO concentrations no more than 10%
- Maximum 8-hour CO concentrations are 3-5 ppm for 1996-1998
Fleet Turnover
- ARB used motor vehicle emission model to show that turnover of light duty fleet will result in a 4-8% CO reduction per year