Are you missing a drum of hazardous waste? Upon discovery, a TSDF must attempt to reconcile any manifest discrepancy with the waste generator or the transporter (e.g., through telephone conversations).
If the discrepancy is not resolved within 15 days after receiving the hazardous waste, the facility owner or operator must immediately submit a copy of the manifest or shipping paper, as well as a letter describing the discrepancy and any attempts to reconcile it, to its implementing agency (40 CFR 264/265.72(b)).