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After a batch of gasoline is certified as RFG, it is given a batch number. How far "downstream" does the batch number follow the material? If a batch is commingled in a terminal with other compatible material belonging to a variety of terminalling customers, does the batch lose its batch number at that time?

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There are no requirements to identify the batch number in the transfer documentation. Once the batch is commingled with other RFG, the refineries' batch numbers are no longer useful to identify the resulting fungible RFG. (10/17/94)

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) (18.2 MB, July 2003, EPA420-R-03-009)