Remember that the bleach is breaking down into table salt and water.
Flushing will cause the salt to go someplace else: someone down hill will suddenly have un-explained salt burn (they will be the next to ask us our opinion) or into the water table, if it is shallow enough. The salt will never break down, just go someplace else.
Hydrogen peroxide: a little oxygenates, a lot kills.
I still think a Ph soil testing kit is in order.
I also think DJS has left the building.
