Update!! The German government has started a clean the seas program that aims to remove all the old wartime munitions that are rusting at the bottom of the Baltic Sea. Why you should care about this exciting new program is that this technology is incredibly applicable to the situation on the California coast, with the barrels of DDT. That the EPA has said to be too far degraded to be removed. If this Piolet program takes off, then we might see this technology here in the US or joint program between the US and Germany to help clean up the DDT.

This is more of how the program is expected to work. As always, I'll link the full article in the link- The German robots hunting the sea for WW2 bombs (bbc.com). I would also like to encourage you to reach out to your representatives in your state about Issues like these. Thank you everyone for caring about the ocean and supporting our journey to make a difference.   

"Sea Terra will also use "smart grabbers", a range of differently shaped, sensor-equipped claws attached to cranes on a ship, Guldin says. They reach into the water and grab the munitions gently or firmly, depending on their state – a crumbling crate filled with ammunition may for example have to be scooped up with a grabber that can close into a bowl, he explains.
A crawler will roll across the seabed on caterpillar tracks and pick up objects such as small-caliber ammunition with its smaller grabber, Guldin says. All the grabbers have cameras, allowing the specialists on the ship to look at the munitions on screens.
The smart grabbers then place the munitions into underwater metal baskets, pre-sorting it roughly into one or two types per basket. The ship with the specialists will be staffed in shifts and operate 24-hours a day: "All they do is identify the munition and put it into the baskets, day in, day out," says Guldin.

A crane mounted onto a second ship dips another claw-like grabber into the water to pick up the baskets, and loads the munitions on board where they are cleaned, weighed, photographed and sorted into steel pipes. The pipes are placed onto a chessboard-like, underwater grid on the seabed, with one type of munition assigned to each square, says Guldin.
 
This careful sorting is important for speeding up the final stage, destruction, Guldin explains. In a later phase of the project, the munition will be loaded into a detonation chamber – a planned huge, oven-like device on an offshore platform – where it is burned."