Optimal Method to Ventilate Hazardous Substances Generated in Indoor Space

This study aims to investigate the ventilation method to reduce the hazardous substance exposure of workers by analyzing the exposure amount of noxious substances depending on the nail shop ventilation conditions. Research design, data, and methodology - This study was carried out with cooperation of Nail shop located in SeongNam city to study indoor air quality and pollutant exposure environment of workers in nail work space. The research subjects were PM-10(Particulate Matter-10㎛), VOCs and Formaldehyde, which are the major materials of nail work space. PM-10 appeared in the order of air purifiers (about 60% reduction) > ventilation (about 32% reduction)> natural ventilation (about 12% reduction). TVOCs showed similar efficiencies (85~99%) after natural ventilation and ventilation after 60 minutes. Formaldehyde showed similar efficiency (80~100%) after natural ventilation and ventilation after 60 minutes. The removal efficiencies of VOCs and formaldehyde were similar to those of natural ventilation and mechanical ventilation system. However, in case of dust, natural ventilation was reduced by artificial ventilation system due to inflow of external dust during natural ventilation. If the pollution degree of outdoor air is not high, air volume is high, and natural ventilation is performed when the air conditioning and heating system is not operated. Even at the end of the work, it keeps operating for 60 minutes to remove the pollutants generated. If institutional legislation is introduced and guidelines for ventilation are provided, it is likely that the worker exposure environment can be improved.