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Fuels Registration, Reporting, and Compliance Help

How do we handle results from two different labs (refinery and outside) which differ?

Technical and engineering judgment must be used to develop an explanation for and/or solution to the discrepancy. This explanation/solution must be supported by the baseline auditor, and is subject to EPA review and approval.(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)