Most construction, farm, and household debris can go in your container. The limits come from California's rules on hazardous household items and from the county landfill.
Hazardous waste, liquids, paint, solvents, fuel, and asbestos can't go in a standard dumpster. CalRecycle's list of items banned from the trash goes further than many people expect. It covers all household batteries, fluorescent tubes and other mercury lamps, electronics like TVs and computers, motor oil and filters, antifreeze, tires, propane tanks, and aerosol cans that still hold paint or solvent.
Treated wood is the item that catches many west-side jobs. Old vineyard stakes, corral rails, and deck framing treated with chemical preservatives must be handled as hazardous waste, so keep them out of the container.
If you're not sure about something, ask your account manager before loading it.