The city of St. Helens and the Oregon Department of Environmental Quality said this week they are looking into claims that toxic materials were improperly disposed of at the Boise White Paper mill three decades ago, after a former millworker said he had firsthand knowledge of a number of possible violations. The purported whistleblower, who also spoke to the Spotlight on condition of anonymity, said he was part of a work detail that dumped 'hundreds' of 55-gallon drums of oil laden with polychlorinated biphenyls in an area of the property, which was later paved over and had a chlorine generator building placed on top of it.