The Pentagon has been handed a demand.

A Hawaii congressman wants to know everything about chemical weapons dumped off our coast, a problem revealed in our series 'Buried at Sea.'

Congressman Neil Abercrombie wants answers from the Secretary of the Army about the risks, and says he'd stand behind a cleanup effort that could rival Kahoolawe.

They're weapons of mass destruction, tens of thousands of tons of chemical munitions dumped at sea decades ago.

"It almost amounts to hiding in plain sight," says Abercrombie.

Abercrombie has demanded a response from the Pentagon.

"The timing, location and the nature of the disposal may be available in some instances, and in other instances simply lost in the midst of history," says Abercrombie.

Witnesses to the dumping say there may be more weapons in more places than the official record reports.

"Here you have a situation where something was done to degrade it, so that would be my concern that people here really depend on the ocean," says Karen Young, a Waianae nurse.

"Rather than ring our hands and bay at the moon we step forward and said, 'look, it's got to be dealt with,'" says Abercrombie. "We're also going to try to come up with something comprehensive in terms of clean-up all across the board."

Abercrombie says it may take a clean-up the magnitude of Kahoolawe.

"We should do something about it. We've got to figure out how to go about it without it ending up being stymied because it's unrealistic as to what can be accomplished," Abercrombie said.

Meanwhile, worried residents await a response from local leaders.

"I hope that the state of Hawaii takes responsibility for its residents seriously, and asks the hard questions and demands the hard answers," says William Aila, Waianae harbormaster.