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Health hazard evaluation report: HETA-92-152-2214, Mesa County Courthouse, Grand Junction, Colorado.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 92-152-2214, 1992 May; :1-24
In response to a request from the Facilities Manager of Mesa County Support Services Department concerning the Mesa County Courthouse and Annex (SIC-9222), Grand Junction, Colorado, an evaluation was undertaken of indoor air quality as employees had been suffering with itchy watery eyes, chronic sinus problems, headaches, and other symptoms. Over the past 5 years, each of the four courtrooms in the Annex had its own ventilation (heating and air conditioning) system installed. The evaluation included questionnaires given to building employees; an examination of the heating, ventilation and air conditioning systems (HVAC) operative at the site; a study of the identifiable sources of contamination; interviews with the representatives of the building management and building employees; and a survey to consider the relative comfort zones in operation in the building. The areas of the Annex building which had a central HVAC system were the source of most complaints. No carbon-dioxide (124389) levels were recorded above 1000 parts per million (ppm) in any section of the building. Temperatures inside ranged from 72 to 79 degrees-F and relative humidity was 17 to 20%. Carbon-monoxide (630080) levels were less than 1ppm. There were times when the amount of outside air mixed in were inadequate. The author concludes that no airborne contaminant which would constitute a health hazard was identified; however, there were deficiencies in the ventilation system. The author recommends measures to improve the ventilation system.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-92-152-2214; Region-8; Hazard-Unconfirmed; Ventilation-equipment; Office-workers; Air-quality; Indoor-air-pollution; Ventilation-systems; Indoor-environmental-quality
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division