Collection hood hood placed over workstation – Ventilation ducting conduit for the contaminated air; transports it to the filter – Filter/air cleaning device between hood and fan; removes contaminant from the air – stream Fan moves the air through the system; correct type/size to be used. – Exhaust duct exhaust the air to the outside of the building; checked reguraly; – Checked every 14 months. Dilution (General) Ventilation Uses natural ventilation (windows) or fan-assisted forced ventilation. It works by removing the contaminant or reducing the concentration. Controls: Reduce time exposure Reduce number of workers Eating etc prohibited Special rules PPE: Filtering mask (8/10hrs only) Half-mask respirator (rubber/plastic covers nose & – Full-face mask respirator (covers eyes & visor) Powered respirator (battery fan delivers air through a filter) Self-contained breathing apparatus (compressed air cylinder) Fresh air hose apparatus (sealed face mask, air from uncontaminated source) Compressed air line apparatus (from compressed air line) Gloves (PVC/nitrile/neoprene) Arm shields Spectacles (safety glasses) Goggles Face visors Clothing Footwear Health risks: Asbestosis or fibrosis of the lungs Lung cancer Mesothelioma (cancer of the lining of the lung) Asbestos: (ACM asbestos containing material) – Blue
Collection hood – hood placed over workstation Ventilation ducting – conduit for the contaminated air; transports it to the filter Filter/air cleaning device – between hood and fan; removes contaminant from the air stream Fan – moves the air through the system; correct type/size to be used. Exhaust duct – exhaust the air to the outside of the building; checked reguraly; Checked every 14 months. Dilution (General) Ventilation Uses natural ventilation (windows) or fan-assisted forced ventilation. It works by removing the contaminant or reducing the concentration. Controls: Reduce time exposure Reduce number of workers Eating etc prohibited Special rules PPE: Filtering mask (8/10hrs only) Half-mask respirator (rubber/plastic – covers nose & Full-face mask respirator (covers eyes & visor) Powered respirator (battery fan delivers air through a filter) Self-contained breathing apparatus (compressed air cylinder) Fresh air hose apparatus (sealed face mask, air from uncontaminated source) Compressed air line apparatus (from compressed air line) Gloves (PVC/nitrile/neoprene) Arm shields Spectacles (safety glasses) Goggles Face visors Clothing Footwear Health risks: Asbestosis or fibrosis of the lungs Lung cancer Mesothelioma (cancer of the lining of the lung) Asbestos: (ACM – asbestos containing material) Blue
NEBOSH%20General%20Cert%20NOTES.docx