Health hazard evaluation report: HETA-93-011-2309, Tri-County North School, Lewisburg, Ohio.
Burr-GA; Wilcox-TG; Weber-AM
NIOSH 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
124-38-9; 50-00-0; 124-18-5
Hazard Evaluation and Technical Assistance; Field Studies
NTIS Accession No.
Hazard Evaluations and Technical Assistance Branch, NIOSH, U.S. Department of Health and Human Services, Cincinnati, Ohio, Report No. HETA-93-011-2309, 60 pages, 45 references