An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Fuels Registration, Reporting, and Compliance Help

Should actual measured values be used for compliance calculations even when they are below those negligible limit values used in the baseline? For example, if a sulfur content of 10 ppm is measured in a batch of finished gasoline, should 10 ppm be used fo