For decades, the land around the Navy's oldest submarine base was a dumping ground for whatever it needed to dispose of: sulfuric acid, torpedo fuel, waste oil and incinerator ash. Now the Pentagon has proposed closing the base, leaving a huge swath of land that contains dozens of acres of polluted soil and groundwater, an Associated Press review of more than 1,000 pages of government documents found. The Submarine Base New London is among at least seven military bases proposed for closure this year that are polluted, and the Pentagon has estimated it will cost more than $700 million to...