Three documents on natural gas emissions derivations are here.
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Natural Gas FTP Emissions Derivation (PDF)(12 pp, 140 K)
- Natural Gas Highway Emissions Derivation (PDF)(6 pp, 56 K)
- Natural Gas Fuel Economy Derivation (PDF)(2 pp, 30 K)