BTW, it is not just the Baltic States with this problem. The US dumped large amounts of chemical weapons off the east coast of the USA in the 1960s and 1970s. The program was called "CHASE" which stood for "Cut Holes And Sink 'Em." Old merchant ships were loaded with chemical munitions and large holes were cut in them so they would sink.

The US also dumped radioactive wastes from the nuclear weapons program off the coast of San Francisco. Look up the history of USS Independence (CVL-22).

Marty