Yes. In the context of generating RINs and specifying the BBBBB code, producers and importers have the option to define a batch as being comprised of several discreet shipments within a calendar month, so long as the total number of gallon-RINs assigned a unique batch number is less than 100 million. See regulation Sections 80.1125(e) and 80.1126(c).
Question and Answer was originally posted at: Questions and Answers on the Renewable Fuel Standard Program (PDF) (55 pp, 221 K, EPA420-F-07-041a, August 2007, About PDF)