The department of ecology shall regulate under this chapter, wastes generated from the salvaging, rebuilding, or discarding of transformers or capacitors that have been sold or otherwise transferred for salvage or disposal after the completion or termination of their useful lives and which contain polychlorinated biphenyls (PCB's) and whose disposal is not regulated under 40 C.F.R. part 761. Nothing in this section shall prohibit such wastes from being incinerated or disposed of at facilities permitted to manage PCB wastes under 40 C.F.R. part 761.