Speaking after the meeting, Keller explained that the height and configuration of Safeco Field would pose problems for cleanup crews. A typical March breeze, though, comes from the south or southwest at speeds up to 5 mph. Seattle Fire Chief James Sewell said the dust would settle rapidly because it would consist mostly of heavy particles from dynamited concrete, with very little plaster or wallboard typical of a commercial or residential building. Nearby buildings will be draped with fabric, air ducts sealed or turned off, and doors and windows sealed, officials said. After implosion, eight water trucks, eight sweeper units and a support crew of 80 workers will be deployed on dust patrol to surrounding neighborhoods.
Contractors hope the dust can be swept up within four hours.
Rain would help bring the particles down faster. Rick Krochalis, director of the city's Department of Design, Land Use and Construction, said in the end it doesn't matter which way the wind blows.