Guidance on Estimating Motor Vehicle Emission Reductions from the Use of Alternative Fuels and Fuel Blends

摘要

The document provides methods and assumptions for estimating the impact of use of alternative fuels and fuel blends on motor vehicle emissions including HC, CO, and NOx. The information is presented in a format which assumes it will be used by State and local air quality planning agencies in preparing current and future emissions inventories and emission reduction strategies during 1988, 1989, and 1990. Such planning efforts will be necessary in areas which receive calls from EPA for revisions to their ozone or CO State Implementation Plans (SIP) following their failure to attain (or in a few cases following their failure to provide for attainment in a prospective sense) the National Ambient Air Quality Standards (NAAQS) for these pollutants. EPA has recently proposed requirements applicable to these SIP calls (52 FR 45044, November 24, 1987), and many affected areas will need to estimate current and future year motor vehicle emissions. Use of alternative fuels and fuel blends is likely to be part of future scenarios that will be examined in many areas.