I suppose it depends on the contract language and the bidding process. You would think these days there would be a performance clause that allowed an agency to immediately drop a contractor that failed to comply with the agreed standards. But, legal may not have given it more than a glancing review before approving the language.
First question, WHY are YOU fixing this?? I would have taken pictures, sent them to the contractor and demanded they make it right. And they NOT send the same people back... ever to your site. My shop would fire people for doing this sort of work or at least I would hope they would.
Nevermind, I see that it was work done prior to your arrival.