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TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com

TOXICOLOGICAL PROFILE FOR CHROMIUM - Davidborowski.com

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<strong>CHROMIUM</strong> 2865. POTENTIAL <strong>FOR</strong> HUMAN EXPOSURETable 5-1. Estimates of U.S. Atmospheric Chromium Emissions fromAnthropogenic Sources aSource categoryEstimatednumber ofsourcesChromiumemissions(metric tons/year)Estimatedhexavalentchromium (%)Combustion of coal and oil Many 1,723 0.2Chromium chemical manufacturing 2 18 67Chemical manufacturing cooling towers 2,039 43 100Petroleum refining cooling towers 475 32 100Speciality/steel production 18 103 2.2Primary metal cooling towers 224 8 100Chrome plating 4,000 700 .100Comfort cooling towers 38,000 7.2–206 100Texile manufacturing cooling tower 51 0.1 100Refractory production 10 24 1.3Ferrochromium production 2 16 5.4Sewage sludge incineration 133 13

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