U.S. Rep. Dan Maffei and U.S. Sen. Charles E. Schumer have asked federal and state environmental officials to assess the health risk posed by dumping contaminated sediment from Onondaga Lake. The sediments contain contains mercury, PCBs and other contaminants. The lake cleanup plan calls for some sediment from the lake bottom to be dredged, piped directly to Wastebed 13 and packed in geotextile tubes.