A huge stack assembly, consisting of a steel framework surrounding four emissions stacks, was placed in position atop Hanford's Low-Activity Waste Vitrification Facility in October. The 130-foot high assembly, weighing about 125 tons, was done with two mobile cranes. The Low-Activity Waste Vitrification Facility is part of the Hanford's Waste Treatment Plant. When operational, the facility will treat and immoblize a large portion of Hanford's underground, liquid low-activity waste.