The Tiberium Waste Facility was a Nod structure similar to a Tiberium Refinery, except that it would process and store Tiberium veins harvested by Weed eaters. It appeared during the Second Tiberium War and the Firestorm Crisis. It did not return in the Third Tiberium War.
When enough Tiberium veins are harvested, the facility compresses all the toxic materials into a warhead which is then delivered to the missile silo. This gives Nod commanders the ability to fire a Chemical missile at their enemies.
The facility's capacity is emptied when the chemical missile is prepared. However, if a chemical missile is already available when it fills, nothing will happen. As soon as the existing missile is fired, the facility's contents are immediately turned into another missile.