Record Display for the EPA National Library Catalog
RECORD NUMBER: 51 OF 77| Main Title | Significance of Regional Source Contributions to Urban PM-10 (Nominal 10 Micrometers) Concentrations. | |||||||||||
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| Author | Batterman, S. A. ; Fay, J. A. ; Golomb, D. ; | |||||||||||
| CORP Author | Massachusetts Inst. of Tech., Cambridge. Energy Lab.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. | |||||||||||
| Year Published | 1986 | |||||||||||
| Report Number | EPA/600/D-86/119; | |||||||||||
| Stock Number | PB86-208725 | |||||||||||
| Additional Subjects | Air pollution ; Sources ; Urban areas ; Sulfates ; Air quality control regions ; Air quality ; Air pollution standards ; Cities ; St Louis(Missouri) ; Philadelphia (Pennsylvania) | |||||||||||
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| Collation | 16p | |||||||||||
| Abstract | Based on data collected in St. Louis, Philadelphia and other cities, this evaluation concludes that about 50-80% of the PM-10 concentrations is 'background.' The bulk of the background appears to be of regional origin. The chemical makeup of the background is sulfate as SO4, 21-34%; crustal material, 14-36%; 'unknown' (carbonaceous matter, ammonium, nitrate and water), 36-51%. Dispersion or receptor modeling using a local source inventory or elemental signatures can account only for the incremental contributions from local sources to the total PM-10 mass. It is argued that emission roll-back of local sources will have a limited effect on reducing total concentrations of PM-10. |