If 'Individual' Barrel tracking has been selected in Basic Setup, Users will see a new section in Storage 'Barrel History, Empty Barrel Mgmt'.

With 'Individual' selected, dumped barrels will now show in 'Manage Dumped Barrels' rather than simply adding the Barrel to Raw Material after use (Generic). Used Barrels can be refilled through this interface:
Refilling through this portal will ensure each individual barrel's usage is tracked in Barrel History.