Record Display for the EPA National Library Catalog

RECORD NUMBER: 36 OF 204

OLS Field Name OLS Field Data
Main Title Cascade Impactor Network.
Author Lee, Jr, Robert E. ; Goranso, Stephen ;
CORP Author National Environmental Research Center, Research Triangle Park, N.C.
Year Published 1972
Report Number 108;
Stock Number PB-213 377
Additional Subjects ( Air pollution ; Particles) ; ( Urban areas ; Air pollution) ; Impactors ; Samplers ; Particle size distribution ; Gravimetric analysis ; Seasonal variations ; District of Columbia ; Illinois ; Ohio ; Colorado ; Missouri ; Pennsylvania ; Air quality data ; Cascade impactors ; High volume samplers ; Chicago(Illinois) ; Cincinnati(Ohio) ; Denver(Colorado) ; Philadelphia(Pennsylvania) ; Saint Louis(Missouri)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-213 377 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 132p
Abstract
An experimental network of modified cascade impactors was set up, as part of the National Air Surveillance Network, to determine gravimetrically the particle size distribution of suspended particulate matter in the air in six urban areas. The modified cascade impactor, the analytical methodology, and the computer processing of data are described. Results of the first year's operation indicate that suspended particulate matter in urban air is predominantly submicron in size (expressed as equivalent spheres of unit density). Variations in the quarterly composites of mass median diameter, various size fractions less than or equal to 1 and 2 microns, and the degree of particle dispersion expressed by the geometric deviation generally followed seasonal patterns. Future expansion of the network is discussed. (Author)