In theory, each step of the RFG testing chain could yield varying (assuming increased) results due to reproducibility -- what is EPA's position on this?
It is up to the regulated parties to determine margins of safety. EPA does not get involved in this determination.(8/29/94)
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)