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A case-control study of airways obstruction among construction workers
Background: While smoking is the major cause of chronic obstructive pulmonary disease (COPD), occupational exposures to vapors, gases, dusts, and fumes (VGDF) increase COPD risk. This case-control study estimated the risk of COPD attributable to occupational exposures among construction workers. Methods: The study population included 834 cases and 1243 controls participating in a national medical screening program for older construction workers between 1997 and 2013. Qualitative exposure indices were developed based on lifetime work and exposure histories. Results: Approximately 18% (95%CI ...
Relationship Between Welding Fume Concentration and Systemic Inflammation After Controlled Exposure of Human Subjects With Welding Fumes From Metal Inert Gas Brazing of Zinc-Coated Materials
Objectives: It has been shown that exposure of subjects to emissions from a metal inert gas (MIG) brazing process of zinc-coated material led to an increase of high-sensitivity C-reactive protein (hsCRP) in the blood. In this study, the no-observed-effect level (NOEL) for such emissions was assessed. Methods: Twelve healthy subjects were exposed for 6 hours to different concentrations of MIG brazing fumes under controlled conditions. High-sensitivity C-reactive protein was measured in the blood. Results: For welding fumes containing 1.20 and 1.50 mg m−3 zinc, high-sensitivity C-reactive protein...
Risk assessment for VCE scenario in an aerosol warehouse
In 2006, Dr Graham Atkinson of HSL was asked by HSE to review the risks from fires in large aerosol stores (Atkinson, 2007). Atkinson reviewed incident statistics and reports and concluded that the greatest risk to people from such fires was from explosions, not from the fire itself. He postulated a vapour cloud explosion (VCE) mechanism, whereby a fire of material elsewhere in the warehouse from the aerosols could give rise to a hot air layer close to the ceiling. Aerosols stored close to the ceiling could then fail and release their flammable contents, but not be immediately ignited by the fire...
Good control practice for workers' exposure to gases in landfill - Sampling and measurement report-RR870
Gases generated by decomposition of landfill contain, principally, methane and carbon dioxide, but may also contain hazardous concentrations of trace components. This project gathered information on the potential exposure of workers to these trace components during specific types of tasks, to provide evidence to develop guidance on good practice for the control of exposure. The study was conducted at six land fill sites identified as having the potential to generate high concentrations of three representative trace components, vinyl chloride, hydrogen sulphide and benzene. Comparisons of personal...
Exposition aux bioaérosols dans deux milieux professionnels
Les cabinets de dentistes et les cultures de concombres et tomates L'exposition aux bioaérosols (1) (endotoxines, bactéries et spores de champignons en suspension dans l'air) et les problèmes de santé qui en découlent sont bien connus dans certains milieux professionnels (station d'épuration des eaux usées, élevages d'animaux, traitements des déchets organiques, travailleurs du bois, récolte et manutention des céréales, agriculture…). Cependant, les études avec investigations des concentrations...
Bioaerosol emissions from waste composting and the potential for workers’ exposure
Composting organic waste is an important component of the waste management process in the UK and the strategy to reduce waste to landfill, and as a result there has been an increase in the number of commercial composting operations. Microbiological activity is fundamental to the composting process, therefore any handling of composting material is likely to make airborne significant quantities of those micro-organisms (referred to as bioaerosols). Workers mechanically handling compost on these sites may therefore be at risk of considerable exposure to bioaerosols depending on their work task, their...
Automated system for indicating spray clearance times of MVR spray booths/rooms
This report describes the design and assembly of an automated device that will alert sprayers of isocyanate based paints of the presence of spray mist inside paint spray booths /rooms used in the motor vehicle repair (MVR) and other industries. Source:

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