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Recorded at AIHce EXP 2019
Use of Coburn-Forster-Kane Equation to Predict Carboxyhemoglobin Levels as a Redundant Control to Protect Soldier Health During Multi-day Range Test Events
The Army uses the Coburn-Forster-Kane equation to predict carboxyhemoglobin (COHb) blood content and sets a military exposure limit of 5 percent COHb for aviation system performance limits and 10 percent percent for all other systems. In this case study COHb concentrations were predicted continuously over approximately 72 hour periods during operational testing of the M109A7 Paladin, a self-propelled howitzer weapon system. During operational testing, soldiers execute several grueling 72-hour vignettes designed to push the weapon systems its limits and to simulate combat conditions. A team of Industrial Hygienists from the Army Public Health Center collected continuous measurements of carbon monoxide air concentrations in the Paladin crew compartment and used this data to generate predictive COHb levels. The results were reported every 12 hours to ensure soldier health was protected during multiple 72-hour test periods, as a redundant control for existing administrative and engineering controls established to prevent carbon monoxide accumulation in the crew compartment.
Presenter: Alice Weber, Army Public Health Center Aberdeen Proving Ground, MD, United States of America
Characterizing Workplace Hazards in Nail Salons in Toronto, Canada
Nail salons are largely small businesses, highly concentrated in urban settings and often employing immigrant women under precarious employment situations. Regulation of the products used is complex. Contact with the occupational health and safety system is thought to be minimal. Previous studies suggest these workers are exposed to various hazards and are at increased risk of occupational illnesses. No previous Canadian studies have investigated occupational exposures in nail salons. Without information on exposure, effective prevention strategies cannot be properly designed or implemented. In Toronto. A research study was conducted to assess exposure to volatile organic compounds, ergonomic hazards and psychosocial stressors among nail salon technicians.
Presenter: Sheila Kalenge, MS MSc, Occupational Cancer Research Centre, OCRC Toronto, Ontario, Canada
Scope, Limits and Innovations of Different Devices for the Sampling of Isocyanates in Air
Isocyanates such as 4,4'-methylenediphenyldiisocyanate (MDI) and toluenediisocyanate (TDI) are important commercial chemicals used to produce polyurethane polymers and are recognized as respiratory sensitizers which can cause occupational asthma. During the application of products containing MDI and TDI, vapors and aerosols may be emitted in air resulting in occupational exposure of workers. Several samplers and derivatization reagents are available or are under development for isocyanate sampling. Among the samplers are impingers, impregnated filters, ASSET-EZ4-NCO and CIP10. Also, several derivatization reagents for isocyanates have been reported, including 1-(2-pyridyl)piperazine (PP), 1-(2-methoxyphenyl)piperazine (MP), dibutylamine (DBA) and 1,8-diaminonaphthalene (DAN). The scope and limitations of these options are not fully documented for a wide range of applications.
Presenter: M. Sébastien Gagné, IRSST Montréal, Québec, Canada
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