HHE Report, No. HETA-81-299-1201, United States Steel Company- Southworks, Chicago, Illinois.
NIOSH 1982 Oct:13 pages
Carbon-monoxide (630080) (CO) exposure in the soaking pit area of the United States Steel Company Southworks mill (SIC-3312) in Chicago, Illinois was evaluated. Local 65 of the United Steel Workers of America requested the study which was performed in July and October of 1981. A total of 60 workers were employed in the soaking pit area. Ambient concentrations of CO were measured, personal breathing zone air samples were collected, blood samples were taken from employees before and after the working shift, and medical questionnaires were administered. Exposures were compared to the NIOSH CO standard of 35 parts per million (ppm), which is designed to limit carboxyhemoglobin formation to 5 percent. In 10 personal breathing zone samples, CO concentrations ranged from 2 to 15ppm. Continuous air monitors showed only occasional concentrations of CO to about 50ppm. Of 22 employees questioned, 59 percent showed at least one symptom more than 3 days out of every week, while 36 percent had no symptoms. No significant correlation was found between number of symptoms and blood CO concentrations. The blood CO concentrations after the working shift showed a slight increase compared to prework values, but no significant trend was noted in carboxyhemoglobin concentrations. The authors conclude that there is no evidence of health hazards due to CO exposure and include recommendations to reduce the possibility of future exposures.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; Hazards-Unconfirmed; Medical-surveys; Time-weighted-average-exposure; Breathing-zone; Air-sampling; HETA-81-299-1201; NIOSH-Technical-Assistance-Report; Region-5;
Hazard Evaluation and Technical Assistance; Field Studies
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, Cincinnati, Ohio, 13 pages, 13 references