** Lifetime is dependant on particle
deposition and is typically days to weeks.Deposition
time is primarily determined by the size of the particles.
atmospheric residence times for some air toxics are listed here.
values were found at http://www.scorecard.org/chemical-profiles/. To find the
atmospheric persistence of other air toxics, enter the
pollutant’s name in the chemical profile.Once the pollutant page is available,
select “links” and the entry for “CalEPA Air Resources Board
Toxic Air Contaminant Summary”.A summary of physical properties is provided including atmospheric