Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Returned To Gate; General Maintenance Action
Human Factors; Procedure
I printed and reviewed my DSTG (Departure Staging Guide) and DDLR (Display Departure Load Record) and proceeded to load [a departing flight]. During the process I received a 4 lbs. piece of cargo that had a label that I [was not] accustom. I have been a lead for [many] years and this was the first time I have seen such a small piece without any recognizable labels. After the flight departed it was gate returned because that 4 lbs. piece turned out to be Dangerous Goods. As I mentioned previously; as [an experienced] lead I have never seen this label and thought the DG was in a freight can.The aircraft came back to the gate because there were only 10 securing the 4 lbs. DG box.During the conversation between Cargo and the Ramp it was revealed that technically it is not DG however it was treated as DG; (UN3373 Biological).I am up to date on my training and consider myself very professional and efficient as a Lead. Dangerous Goods labeling should always be clear and obvious to prevent any oversight. As per the [our company manuals].
Ramp Lead Supervisor reported an aircraft ground return due to incorrect transport configuration of Hazmat cargo.