Cracked and leaking
Maybe. I don't know if it's a DIY project. You may be able to attack this problem from the outside, I don't know. You may have no choice but to attack it from the INSIDE. Either way, have a Contractor that SPECIALIZES in this line of work talk to you about BOTH options. First educate yourself, then you'll be able to make an informed decision. Sorry, but I can't see it from here.
My best to ya and hope this helps.
Jay J - Moderator
PS: God Bless America!