Graphical approaches to calculating E200 and E300 for all fuels (i.e. both baseline and compliance fuels) can be used when curve-fitting or linear interpolation are not feasible. The conversion equations provided in the regulations can only be used if the only data available to a refiner is T50 and T90 measurements (i.e. no other distillation data is available).(7/1/94)

This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (PDF)(333 pp, 18.17 MB, EPA420-R-03-009, July 2003, About PDF)