"The Action Level"®.
Published in Journal of occupational and environmental hygiene
Conducting an evaluation of CBRN canister protection capabilities against emerging chemical and radiological hazards
Published in Journal of occupational and environmental hygiene
In the event of a chemical, biological, radiological, or nuclear (CBRN) hazard release, emergency responders rely on respiratory protection to prevent inhalation of these hazards. The National Institute for Occupational Safety and Health’s (NIOSH) CBRN Statement of Standard calls for CBRN respirator canisters to be challenged with 11 different chem...
Prevalence of Bovine Leukemia Virus (BLV) and Bovine Adenovirus (BAdV) genomes among air and surface samples in dairy pr...
Published in Journal of occupational and environmental hygiene
We aimed to assess the occurrence of bovine viruses (bovine leukemia virus-BLV and bovine adenovirus-BAdV) at workplaces in traditional dairies and to evaluate the potential role of airborne and surface contamination in spreading of these viruses derived from raw milk. The total amount of 122 samples-including 37 air (bioaerosol), 40 surface, and 4...
Aerodynamic size separation of glass fiber aerosols.
Published in Journal of occupational and environmental hygiene
The objective of this study was to investigate the efficacy of an aerodynamic separation scheme for obtaining aerosols with nearly monodisperse fiber lengths as test samples for mechanistic toxicological evaluations. The approach involved the separation of aerosolized glass fibers using an Aerodynamic Aerosol Classifier (AAC) or a multi-cyclone sam...
Control of wildfire-sourced PM2.5 in an office setting using a commercially available portable air cleaner.
Published in Journal of occupational and environmental hygiene
A steady increase in wildfire event severity and season length has led to greater potential for exposure to fine particulate matter associated with wildfire smoke. Research has found fine particulate matter to be correlated with a myriad of health ailments and thus effective strategies for controlling exposures are needed. In this study, a correcti...
Variability of aerosol mass and number concentrations during taconite mining operations.
Published in Journal of occupational and environmental hygiene
This study characterized concentration metrics of airborne nanoparticles and their time series across major operations of a taconite mine through monitoring respirable and ultrafine particle concentrations at four major processing departments of the mine: crushing, dry milling, wet milling, and pelletizing (United Taconite Mine, Iron Junction, MN, ...
Biocidal spray product exposure: Measured gas, particle, and surface concentrations compared with spray model simulation...
...Published in Journal of occupational and environmental hygiene
The purpose of the study was to compare measured air and surface concentrations after application of biocidal spray products with concentrations simulated with the ConsExpo Web spray simulation tool. Three different biocidal spray products were applied in a 20 m3 climate test chamber with well-controlled environmental conditions (22 ± 1 °C, 50 ± 2%...
Characterizing particle emissions from a direct energy deposition additive manufacturing process and associated occupati...
Published in Journal of occupational and environmental hygiene
This study aims to characterize airborne particles emitted from a metal additive manufacturing machine and related levels of occupational exposure. To achieve this, a complete measurement methodology was deployed around a direct energy deposition machine. Different operating conditions were investigated, based on configurations of two materials and...
Fatigue and sleep patterns among Canadian wildland firefighters during a 17-day fire line deployment.
Published in Journal of occupational and environmental hygiene
The purpose of this investigation was to enhance our understanding of the effects the current British Columbia Wildfire Service (BCWS) firefighting schedule have on the development of fatigue and sleep deprivation. This was a cohort study that objectively and subjectively measured sleep quantity, sleep quality, and fatigue throughout a 17-day Briti...
Double gloving of disposable nitrile gloves exposed to diethylene glycol mono-n-butyl ether.
Published in Journal of occupational and environmental hygiene
Double gloving of disposable gloves is now commonplace in healthcare settings when extra protection is needed against aqueous solutions and especially for antineoplastic drugs in isotonic aqueous media. In the present study, an ASTM F739 2.54 cm cell with closed-loop water collection without recirculation at 35 °C in a moving tray water bath was us...
