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Main Title Source assessment : crushed limestone : state of the art /
Author Chalekode, P. K. ; Blackwood, T. R. ; Archer., S. R.
Other Authors
Author Title of a Work
Blackwood, T. R.
Archer, S. R.
CORP Author Monsanto Research Corp., Dayton, Ohio.;Industrial Environmental Research Lab.-Cincinnati, Ohio.
Publisher Industrial Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Available through the National Technical Information Service,
Year Published 1978
Report Number EPA/600/2-78/004E; MRC-DA-747; EPA-68-02-1874
Stock Number PB-281 422
Subjects Crushed stone industry--Environmental aspects ; Air--Pollution--United States
Additional Subjects Air pollution control ; Limestone ; Industrial wastes ; Assessments ; Sources ; Silicon dioxide ; Particles ; Nitrogen oxides ; Carbon monoxide ; Design criteria ; Forecasting ; Technology ; Emission factors ; State of the art ; Crushed limestone industry
Library Call Number Additional Info Location Last
NTIS  PB-281 422 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xi, 51 pages : illustrations ; 28 cm.
This report describes a study of atmospheric emissions from the crushed limestone industry. Crushed limestone plants emit particulates from drilling, blasting, transport on unpaved roads, crushing, screening, conveying, and stockpiling. The emission factor for total particulate from a representative plant producing 450 metric tons/hr of product is 3.5 g/metric ton. Vehicular movement on unpaved roads contributes 66% of the overall emissions and approximately 38% of the respirable particulate emissions. The hazardous constituent in the dust is free silica (1.2% by weight). Nitrogen oxides and carbon monoxide are emitted by the blasting operation, but their emission factors are small in comparison to that of particulate emissions. In order to evaluate the potential environmental effect of crushed limestone plants, source severity was defined as the ratio of the maximum time-averaged ground level concentration of an emission to the ambient air quality standard for criteria pollutants or to a modified TLV for noncriteria pollutants. The maximum source severity for particulates is 0.032; for free silica in the respirable particulate emissions, it is 0.12. Emissions from this industry in 1978 are estimated to be the same as they were in 1972.
Prepared for U.S. Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory, Cincinnati, Ohio, submitted by Monsanto Research Corporation, under contract no. 68-02-1874. Includes bibliographical references. Microfiche.