Chem Shop can usually help you coordinate with the Custodian Supervisor if you are unfamiliar with the process. See diagram of dumpster area for cardboard recycling area. This means everything. Pizza boxes too. Hallways are not to be used for trash transfer or any storage however temporary, even if your custodian tells you to.
Hallways are to be kept clear of all items.
Not only trash, but just plain all items . In fact, hallways are for people. The dumpster enclosure and recycling areas are immediately east of that tank. Enlarged view below shows locations for various materials. A Location of recycle bins for office paper and newprint.