A refiner that intends to distribute RFG must certify that product using the test methods prescribed in the Final Rule. However, a refiner performing quality assurance testing downstream of the refinery may use other test methods provided these methods have been correlated with EPA's test methods.(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)