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Health hazard evaluation report: HETA-91-097-2240, New York Center for Agricultural Medicine and Health, Cooperstown, New York.

Kullman GJ; Jones WG; Piacitelli CA
Morgantown, WV: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 91-097-2240, 1992 Jul; :1-25
In response to a technical assistance request from the New York Center for Agricultural Medicine and Health, Cooperstown, New York a joint investigation was undertaken to assess the effectiveness of a dust control method. Air samples were collected to assess the effectiveness of water applied to hay bales in reducing airborne dust concentrations during the chopping of bedding at dairy farms (SIC-0241). Eight different barns were sampled over a 4 day period. During dry chopping operations, the average personal exposure to inhalable dust was 11.31mg/m3. The average exposure from wet chopping operations was 2.76mg/m3. The average area inhalable dust concentration from dry chopping was 11.08 mg/m3 and from wet chopping was 2.65 mg/m3. Endotoxin concentrations found on personal inhalable dust samples during dry sampling conditions had an average of 5,968 endotoxin units (EU) per cubic meter (m3) of air. Samples from wet chopping operations had lower endotoxin concentrations with an average of 1260 EU/m3. Fungal concentrations averaged 6.1x10(6) colony forming units per cubic meter (CFU/m3) in dry conditions and 4.9x10(5) CFU/m3 in wet conditions. Bacterial concentrations were also lower during wet chopping. The authors conclude that wet chopping significantly reduced the concentration of airborne dusts, endotoxins, viable fungi, mesophilic bacteria and gram negative bacteria.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-91-097-2240; Region-2; Dust-control; Plant-dusts; Airborne-dusts; Organic-dusts; Animal-husbandry; Air-quality-monitoring; Microorganisms; Hazard-Unconfirmed; Author Keywords: Dairy Farms; bedding chopping; organic dusts; fungi; bacteria; endotoxins
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Field Studies; Hazard Evaluation and Technical Assistance
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National Institute for Occupational Safety and Health
Page last reviewed: September 22, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division