I guess my first question would be why didn't they pressure test the line prior to pouring the concrete. The leak was surely there then.
aside fromm that, I woiuld encourage them to pinpoint, so to tear up a minimum amount of concrete. Also, make sure they replace joint to joint , don't let then try to rip up half a block and add another joint unless, in your opinion it will look OK with the extra joint. Make sure they saw cut. Make sure they use the same concrete plant as the original pour. It won't be a perfect match, but will be close, and after a couple years, it will match.
I understand Carlton is a PITA to get back for service. Best of Luck.
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