May records, regardless of whether they are paper or electronic, be stored off-site?

Yes. Refiners, oxygenate blenders and importers must indicate where records will be kept on all facility registrations.(7/1/94)

This question and answer was originally 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)