EPA officials want to spend about $45 million to clean up a section of Baltimore County’s Bear Creek that was contaminated by Bethlehem Steel. A 61-acre portion of the creek, located to the west of the Sparrows Point peninsula, officially became a “Superfund” site in 2022, joining a national list of other badly polluted hazardous waste sites eligible for federal cleanup aid. The creek’s sediment is laden with cancer-causing PCBs, arsenic, heavy metals and grease. The Superfund area sits at the foot of the Tin Mill Canal, where wastewater from steelmaking was dumped.