Ordinary construction and cleanout debris is fine. The limits come from Pennsylvania's disposal rules and from what the receiving landfill will take.
Pennsylvania bans covered electronic devices from disposal outright. Desktop and laptop computers, computer monitors, computer peripherals and televisions may not go in municipal waste, and a landfill is not allowed to accept them. Haulers and transfer stations may not mix them into a load bound for disposal either, and the penalties fall on whoever does it. A single television can get an entire container turned away at the gate.
Appliances with refrigerant in them are their own problem. Pottstown's own crews will not take a refrigerator, freezer, dehumidifier or window air conditioner without a sticker certifying that the refrigerant has been removed and recovered, and the landfill applies the same thinking. Have those evacuated first.
The standard container exclusions apply as well: hazardous waste, liquids, wet paint, solvents, fuel, propane tanks, asbestos, infectious or medical waste and incinerator ash. Tires in quantity and whole appliances in quantity are also kept out of the county disposal system by the Borough's own code.
Businesses in Pottstown with 50 or more employees sit outside the state's manufacturer-funded electronics collection programs and have to arrange their own recycling. If that is you, raise it with your account manager when you book, so the electronics never reach the container.