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Health hazard evaluation report: HETA-96-0226-2640, Lehigh Portland Cement Company, Union Bridge, Maryland.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, HETA 96-0226-2640, 1997 May; :1-21
In response to a request from the Safety and Training Supervisor of the Lehigh Portland Cement Company (SIC-3241), Union Bridge, Maryland, an investigation was made to identify a bleach odor inside one of the cement kilns. Maintenance personnel working inside the kiln at times of shutdown reported respiratory and eye irritation. Personal breathing zone samples were collected during the next shut down while workers were removing and replacing 25 feet of refractory brick at the front end of the kiln. Area samples were collected for chlorine (7782505), inorganic acids, sulfur-dioxide (7446095), oxides of nitrogen, ozone (10028156), respirable dust, total and inhaled dusts. Ozone was detected at 0.6 to 0.7 part per million (ppm) when conditions during previous episodes were recreated. Ozone was detected through a portal at the back end of the kiln at well over 0.7ppm. A direct reading meter revealed a concentration of 4.5ppm. When the induced draft fan was turned off, ozone from an electrostatic precipitator apparently back drafted into the kiln. The authors conclude that the eye and respiratory irritation were a result of ozone exposure.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-96-0226-2640; Hazard-Confirmed; Region-3; Respiratory-irritants; Eye-irritants; Cement-industry; Occupational-exposure; Toxic-gases; Author Keywords: Portland cement manufacturing; Portland cement; kiln maintenance; electrostatic precipitator; ozone; respiratory irritation
7782-50-5; 7446-09-5; 10028-15-6
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division