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Health hazard evaluation report: HETA-84-392-1597, Syntex Dental Products, Inc., Audubon, Pennsylvania.
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 84-392-1597, 1985 Jun; :1-17
Environmental and breathing zone samples were analyzed for carbon- dioxide (124389), formaldehyde (50000), mercury (7439976), bacteria, and fungi at Syntex Dental Products, Incorporated (SIC-5086), Audubon, Pennsylvania in July and August, 1984, and January, 1985. A confidential evaluation was requested because of prolonged employee complaints of eye and respiratory irritation. Ventilation rates and relative humidity of the indoor air were measured. All chemical exposures were below their relevant standards or non detectable. Carpet and air filter samples contained up to 11,000 bacteria per gram and 960 fungi per gram. There are no federal standards for microorganism aerosols. The amount of outside air supplied by air handling units that were tested ranged from 8 to 63 percent. Indoor relative humidities ranged from 63 to 90 percent. The author concludes that chemical exposures at the facility are not exceeding the OSHA standards. There is a possibility that certain susceptible individuals may be affected by the high relative humidity, lack of outside air, and microorganisms. The author recommends increasing the supply of outside air to the ventilation system, maintaining relative humidity at about 50 percent, and treating microorganism infested materials with proprietary biocides.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; Hazards-Unconfirmed; Dentistry; Region-3; Analytical-models; Biological-effects; Dental-materials; Dental-health; HETA-84-392-1597; Author Keywords: Profession Equipment Suppliers; Itching and Burning of the Eyes; Coughing; Sneezing; Tightness in Chest; %RH; Ventilation; Bioaerosol
124-38-9; 50-00-0; 7439-97-6
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division