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Health hazard evaluation report: HETA-93-011-2309, Tri-County North School, Lewisburg, Ohio.
Burr GA; Wilcox TG; Weber AM
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 93-011-2309, 1993 Apr; :1-60
In response to a request from the superintendent of the Tri-County North school system (SIC-8211), Lewisburg, Ohio, an investigation was begun into possible airborne pollutants at that site. Employees had reported respiratory difficulty, impaired concentration, nausea, and severe headaches. The two story elementary/middle/high school was completed in 1990. Approximately 1,125 students, 70 teachers, and 20 nonteaching staff were located in the building. The school used 114 heat pumps, controlled by a central computer system, to condition the air in the school. Carbon-dioxide (124389) levels consistently exceeded 1000 parts per million (ppm) throughout the building. Temperature and humidity levels were within comfort requirements. Formaldehyde (50000) levels ranged from 0.02 to 0.04ppm. No evidence of microorganisms was found. Very low levels of volatile organic compounds were measured in classrooms. Decane (124185), used in photocopiers, was detected in several areas. The authors conclude that the amount of outside air supplied was below the ventilation design criteria for classrooms. The authors recommend that the amount of outside air be increased, emissions from photocopiers be controlled, and that the ventilation system be improved.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-93-011-2309; Hazard-Confirmed; Region-5; Indoor-air-pollution; Air-quality-control; Office-workers; Ventilation-systems; Organic-vapors; Organic-solvents; Indoor-environmental-quality; Author Keywords: Elementary and Secondary Schools; indoor environmental quality; carbon dioxide; temperature; relative humidity; ventilation; volatile organic compounds; bioaerosols; IEQ; IAQ; formaldehyde
124-38-9; 50-00-0; 124-18-5
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
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Content source: National Institute for Occupational Safety and Health Education and Information Division