A dilution source sampling system was used to collect
primary fine aerosol emissions from important sources of
urban organic aerosol, including a boiler burning No. 2 fuel
oil, a home fireplace, a fleet of catalyst-equipped and
noncatalyst automobiles, heavy-duty diesel trucks, natural
gas home appliances, and meat cooking operations. Alternative
dilution sampling techniques were used to collect
emissions from cigarette smoking and a roofing tar pot,
and grab sample techniques were employed to characterize
paved road dust, brake lining wear, tire wear, and vegetative
detritus. Organic aerosol constituted the majority
of the fine aerosol mass emitted from many of the sources
tested. Fine primary organic aerosol emissions within the
heavily urbanized western portion of the Los Angeles Basin
were determined to total 29.8 metric tons/day. Over 40%
of these organic aerosol emissions are from anthropogenic
pollution sources that are expected to emit contemporary
(nonfossil) aerosol carbon, in good agreement with the
available ambient monitoring data
