Ordinary construction and household debris is fine to load. The limits come from what the Borough's own facility will take and from the way Pennsylvania classes waste.
The Borough's yard waste site takes green material only. Its published rules refuse garbage and construction debris outright, and then name the material: beams, block, brick, concrete, construction wood, decking, dirt, gypsum, metal, fasteners, pallets, paneling, plastic, plywood, shale, shingles, siding, soil, and stone are all ineligible there. Grass clippings are out too, and plastic bags are rejected at the gate.
Hazardous waste, liquids, paint, solvents, fuel, and asbestos stay out of any standard container. So do propane cylinders and sealed drums. Keep tires, appliances, and electronics separate and mention them when you book, because each travels a different route.
One Pennsylvania point is worth planning around rather than discovering later. The state requires the trucks that carry waste to permitted facilities to hold a current state authorization, and it bars those facilities, including transfer stations, from accepting a load from a truck without one. That is settled before your container is scheduled, not at the gate, and it is part of why we confirm the destination up front.
If an item has you guessing, ask your account manager before it goes in the container.