A new guy saturated a couple of areas with I believe full concentrated strength Professional grade Round Up. He says he followed instructions but it's very obvious he didn't. You can even see patches of what i believe are his foot steps going from the area to the driveway. The end result is the grass is dying and since the area has a bit of a slope it appears to be spreading downward to the adjacent lot. We had some heavy rain a few days after application, not sure if that contributed to the spread down slope. There was another area with new plantings, looks like one of the bushes is half dead, i'm guessing the other half will follow. We're obviously going to need to fix this, i'm just wondering how long I should wait to make sure the killer is gone and can i get away with seed at this time of year in SE Wisconsin or do we go with sod? It's been just about a week and a half since the application...any advice would be greatly appreciated.