First, it is important to remember that fire retardant-treated wood, like preservative-treated wood, is not a hazardous product and has not been listed as a hazardous waste.
It is completely proper and legal to send fire retardant-treated wood to a landfill. However, due to the growing shortage of landfill space, many industrial users select recycling of wood as their disposal option. There is a growing movement to “manage” the disposal of wood. In many cases, the fire retardant-treated wood can be reused in its original use or used in secondary applications.
In cases where the wood cannot be reused, it can be disposed of in landfills.