Respiratory protection for firefighters--evaluation of CBRN canisters for use during overhaul

Journal of Occupational and Environmental Hygiene
Leaton JonesJefferey L Burgess

Abstract

In the United States, there are approximately 366,600 structural fires each year. After visible flames are extinguished, firefighters begin the overhaul stage of firefighting to smother remaining hot spots and initiate investigations. Typically during overhaul significant ambient concentrations of chemical contaminants remain. However, previous research suggests that the use of air purifying respirators (APR) fitted with chemical, biological, radiological, and nuclear (CBRN) canisters may reduce occupational respiratory exposures. This pilot study used large-scale prescribed burns of representative structural materials to perform simultaneous, side-by-side, filtering and service-life evaluations of commercially available CBRN filters. Three types of CBRN canisters and one cartridge were challenged in repetitive post live-fire overhaul exposure tests using a sampling manifold apparatus. At a flow rate of 80 L/min, nine tests were conducted in the breathing zone for three different exposure durations (0-15 min, 0-30 min, and 0-60 min). Fifty different chemicals were identified for evaluation and results indicate that 21 of the 50 chemicals tested were in the air of the overhaul environment. Respirable particles and formaldehyde w...Continue Reading

References

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Citations

Jan 25, 2020·Journal of Occupational and Environmental Medicine·Jefferey L BurgessShane A Snyder
Apr 1, 2021·Annals of Work Exposures and Health·Shawn D StaackJefferey L Burgess

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