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Health hazard evaluation report: HETA-95-0026-2488, Tri-County North School, Lewisburg, Ohio.
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 95-0026-2488, 1995 Feb; :1-27
In response to a request from administrators at the Tri-County North (TCN) Local School System (SIC-8211), Lewisburg, Ohio, a follow back evaluation was conducted after ventilation changes had been made, and the ventilation system had been tested and balanced. Carbon- dioxide (124389) levels, temperature, relative humidity, formaldehyde (50000), and total volatile organic compounds were measured. Carbon-dioxide levels exceeded 1,000 parts per million (ppm) in some classrooms. Formaldehyde levels ranged up to 0.019ppm in the classrooms as time weighted averages (TWAs). Total volatile organic compound concentrations of 3.7 and 4.4mg/m3 were detected in two of eight general area samples, near photocopiers. The author concludes that a health hazard was not identified during this evaluation. Indoor environmental quality has continued to improve since the initial evaluation conducted in 1992. The author recommends that the photocopiers which use liquid toner be replaced, or local exhaust ventilation be used in the area. Some classrooms still did not provide the recommended 15 cubic feet of outside air per person.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-95-0026-2488; Hazard-Unconfirmed; Region-5; Office-workers; Indoor-air-pollution; Air-quality-monitoring; Organic-compounds; Indoor-environmental-quality; Author Keywords: Elementary and Secondary Schools; indoor environmental quality; carbon dioxide; temperature; relative humidity; ventilation; total volatile organic compounds; IEQ; IAQ; formaldehyde
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division