The only option is to make do with the data available. If it seems clear to the auditor that data is in error or otherwise false but this cannot be verified, that data should be excluded from the calculations, with an explanation.(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)