What does Goodnick suggets we do...get on our hands and knees with damp paper towels and sop up the soot?
You can't sweep it. It just sticks to the cracks in the concrete. And if you sweep with gusto, aren't you blowing it into the air just as bad as a blower?
I think washing it down is the lesser of the available evils. If it is washed down (using a minimal amount of water), then when the inevitable winds kick up again, there will be less soot to fly everywhere.
Not to mention that I won't have to clean my carpet every two weeks.
The notion that we will be in danger when our creeks will be fouled by potash is silly. Wait for the first rain. That will add more potash to the creeks than having 100,000 people wash down their driveways. And may I add that this is a natural occurrance.