We're sorry to say all we ourselves could share was the following gloom and doom, when B recently asked for help:
Yikes, quack grass in a lawn is no fun, B. Quack grass has to be killed or dug out completely, and removed or barred wherever it originated. Sometimes it runs in underground from neighboring areas, sometimes it comes in with topsoil, or it can simply get started from seed that blew in or dropped in. Because it's tougher than lawn grass, once it's in, the bluegrass or fescue usually can't crowd it out.
Most of the time people kill off the whole area that's infested with quack grass, then wait at least two weeks to watch for sprouts that must be killed anew or dug out. That's because the quack grass will often not die from one application of an herbicide. It may have so much root mass that the amount of herbicide the blade can absorb is not enough to reach all of the root.
After an area's quackgrass free, lay sod. Seeding isn't a good move, as there is a good chance quack grass seed already in the soil will germinate along with the new bluegrass or fescue seed. It'll be impossible to distinguish until it's too late.
We've posted your question in our Forum in the Lawns folder. The people we've asked to keep watch there, the ones who work on more lawns than we do, can probably tell you more. Check there from time to time for alternate approaches. (If you become a Forum member - it's Free-- you can have the computer check automatically for you. Click "Follow this topic" at that posting and the computer will send you an email whenever someone adds information to this topic.)