The Environmental Protection Agency wants public comment about its plan to clean up pesticide off the Palos Verdes Peninsula.
Seventy years ago, a company near Torrance dumped DDT and toxic PCBs into the sewers, which flowed into the ocean.
EPA spokesman Francisco Arcaute says harmful materials are still in the water.
Francisco Arcaute: "Basically what the EPA is proposing is to place a cap on the sediment of the contaminated sites on the ocean floor and then have a series of monitoring and tests over the years."
Federal and state environmental officials will present details of the project at public hearings on Tuesday in San Pedro, Wednesday in Wilmington, and Thursday in Rolling Hills.