Most of what comes out of a remodel or cleanout is fine. California's rules and the landfill's own acceptance policy set the limits.
The state's Department of Toxic Substances Control classifies a group of household items as universal waste that can't go in the trash or a landfill. The list includes batteries, electronics, TVs and monitors, fluorescent tubes and bulbs, mercury devices like thermostats, aerosol cans that still hold product, and solar panels.
Paint, solvents, pesticides, motor oil, automotive fluids, and anything labeled Danger, Caution, Warning, Flammable, or Poison are out as well. Placer County residents can drop those off free at the landfill's household hazardous waste counter, up to 15 gallons or 125 pounds a day.
Tires never ride in the container. They're charged by the piece at the gate, along with appliances, and a refrigerator or air conditioner costs $46.50 each to dispose of. Mattresses are worth pulling out too, since California residents can drop off up to four a day at the landfill at no charge, while a mattress buried in a mixed load is billed as regular refuse.
Not sure where an item falls? Your account manager can sort it out before the container is loaded.