Editing Polychlorinated biphenyl (section)

====Great Lakes====
In 1976, environmentalists found PCBs in the sludge at [[Waukegan, Illinois|Waukegan]] Harbor, the southwest end of [[Lake Michigan]]. They were able to trace the source of the PCBs back to the Outboard Marine Corporation that was producing boat motors next to the harbor. By 1982, the Outboard Marine Corporation was court-ordered to release quantitative data referring to their PCB waste released. The data stated that from 1954 they released 100,000 tons of PCB into the environment, and that the sludge contained PCBs in concentrations as high as 50%.<ref>{{cite book | vauthors = Ashworth W |title=The Late, Great Lakes |publisher=Wayne State University Press |year=1987 |isbn=978-0-8143-1887-4}}{{Page needed|date=May 2013}}</ref><ref>{{cite web| vauthors = Mahan ML |date=May 4, 1998 |title=Are PCBs still a problem in the great lakes? |url=http://www.cevl.msu.edu/~long/pcb.htm |archive-url=https://archive.today/20120722012319/http://www.cevl.msu.edu/~long/pcb.htm |archive-date=July 22, 2012 |url-status=dead}}{{self-published source|date=May 2013}}</ref>{{self-published inline|date=May 2013}}

In 1989, during construction near the [[Zilwaukee, Michigan|Zilwaukee]] bridge, workers uncovered an uncharted landfill containing PCB-contaminated waste which cost $100,000 to clean up.<ref>{{cite web|url=http://www.michiganhighways.org/indepth/zilwaukee.html|title=Michigan Highways: In Depth: The Milwaukee Bridge | vauthors = Bessert CJ |work=michiganhighways.org}}</ref>

Much of the [[Great Lakes]] area were still heavily polluted with PCBs in 1988, despite extensive remediation work.<ref>{{cite journal | vauthors = Hileman B |title=Great Lakes Cleanup Effort |journal=Chemical and Engineering News |volume=66 |issue=6 |date=February 8, 1988 |pages=22–39 |doi=10.1021/cen-v066n006.p022}}</ref>