Electrical transformers come in two categories, wet and dry.
The dry type transformer is generally not a disposal problem. The wet type transformer may contain oil which contains Polychlorinated Biphenyls , or PCBs. The disposal of any oil-filled transformer should be coordinated through the Hazardous Waste Management Program. The transformer should be completely disconnected from any power source. If the unit has a large enough reservoir, we will draw a sample to determine whether the oil contains PCBs.