I do recall that the Arizona had a full bunker on December 7th. I believe this was about 2,100,000 gallons of 420 cSt heavy oil.
I knew it was a lot. WOW, that is massive and most it is probably still there.
There was a rumor that among the Navy's solution to the failing wreck was to build a cement sarcophagus around and over the ship.
We are talking about a Battle Ship here. That would be Huge! All of that construction around that could cause the fuel bunkers to rupture!
More than oil would be released.
There are still remains below the decks from December 7th, plus a dozen or more sets of ashes from those who survived the attack who wanted to join their ship mates. This is why the Navy is loath to do anything...