Keith Bein - Identification of sources of atmospheric PM at the Pittsburgh Supersite. Part III: Source characterization

Version 1

      Publication Details (including relevant citation   information):

      Bein, K.J., Zhao, Y., Johnston, M.V., and A.S. Wexler (2007),   Identification of sources of

           atmospheric PM at the Pittsburgh   Supersite. Part III: Source characterization,   Atmospheric

           Environment, 41(19), 3974-3992.


           Single particle mass spectrometry data   collected during the Pittsburgh Supersite experiment was used to   isolate an episode on 10/27/01 when the measurement site was   primarily influenced by emissions from coal combustion   sources.  Results showed that (a) 60-80% of the particles   detected during this event belonged to the Na/Si/K/Ca/Fe/Ga/Pb   particle class associated with coal combustion emissions, (b)   observation of this class was an isolated event occurring only   during the hours of 06:00-14:00 EST, and (c) the detection of   these particles was highly correlated with shifts in wind   direction.  Coincident SMPS, TEOM PM2.5,   SO2, NOx, and O3 measurements   were in excellent agreement with the single particle results in   terms of both identifying and characterizing this event.    The three most likely point sources of these particles were   isolated and Gaussian plume dispersion models were used in   reverse to predict their particle number, particle mass, and gas   phase emissions. Calculated mass emission rates were in general   agreement with the US EPA National Emissions Inventory (NEI)   database emissions estimates and the Title V PM10  limit.  The largest of the three sources emits about   2.4×1017 fine and ultrafine particles per second.

      Address (URL): http://