If you're justified in calling on 5th street (meaning the opponent isn't likely to have a flush), then value betting the river makes sense, but I don't think you're justified in calling on 5th street.

I would consider raising 3rd street, but this is a matter of personal preference. 4th, I think raising for a free card on 5th street isn't a bad play here. 5th seems like a definite fold.