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The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Emissions from the Crushed Granite Industry: State-of-the-Art.

PB281043

Publication Date	1978
Personal Author	Chalekode, P. K.; Peters, J. A.; Blackwood, T. R.; Archer, S. R.
Page Count	68
Abstract	This report describes a study of atmospheric emissions from the crushed granite industry. The potential environmental effect of this emission source was evaluated using source severity, defined as the ratio of the maximum time-averaged ground level concentration of a pollutant at a representative plant boundary to a hazard factor. The hazard factor is the ambient air quality standard for criteria pollutants and an adjusted threshold limit value for noncriteria pollutants. Pollutants are emitted from several operations including drilling, blasting, transport on unpaved roads, crushing, screening, conveying, and stockpiling. Emission factors are determined for particulates emitted from trace operations. The emission rate of respirable particulates (<7 micrometers is 6.9 kg/hr). The major hazardous constituent in the dust is free silica (27.2% by weight).
Keywords	Air pollution control Silicon dioxide Particles Dust Industrial wastes Concentration(Composition) Sources Design criteria Process charting Forecasting Technology Air quality Granite industry Emission factors State of the art Minerals industry
Source Agency	Environmental Protection Agency Office of Research and Development
NTIS Subject Category	68A - Air Pollution & Control
Corporate Authors	Monsanto Research Corp., Dayton, Ohio.; Industrial Environmental Research Lab.-Cincinnati, Ohio.
Document Type	Technical Report
Title Note	Final task rept. Apr 75-Jul 77.
NTIS Issue Number	197817
Contract Number	EPA-68-02-1874

Emissions from the Crushed Granite Industry: State-of-the-Art.

Emissions from the Crushed Granite Industry: State-of-the-Art.
PB281043

Publication Date	1978
Personal Author	Chalekode, P. K.; Peters, J. A.; Blackwood, T. R.; Archer, S. R.
Page Count	68
Abstract	This report describes a study of atmospheric emissions from the crushed granite industry. The potential environmental effect of this emission source was evaluated using source severity, defined as the ratio of the maximum time-averaged ground level concentration of a pollutant at a representative plant boundary to a hazard factor. The hazard factor is the ambient air quality standard for criteria pollutants and an adjusted threshold limit value for noncriteria pollutants. Pollutants are emitted from several operations including drilling, blasting, transport on unpaved roads, crushing, screening, conveying, and stockpiling. Emission factors are determined for particulates emitted from trace operations. The emission rate of respirable particulates (<7 micrometers is 6.9 kg/hr). The major hazardous constituent in the dust is free silica (27.2% by weight).
Keywords	Air pollution control Silicon dioxide Particles Dust Industrial wastes Concentration(Composition) Sources Design criteria Process charting Forecasting Technology Air quality Granite industry Emission factors State of the art Minerals industry
Source Agency	Environmental Protection Agency Office of Research and Development
NTIS Subject Category	68A - Air Pollution & Control
Corporate Authors	Monsanto Research Corp., Dayton, Ohio.; Industrial Environmental Research Lab.-Cincinnati, Ohio.
Document Type	Technical Report
Title Note	Final task rept. Apr 75-Jul 77.
NTIS Issue Number	197817
Contract Number	EPA-68-02-1874