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新加坡军团菌管理规范.pdf FOREWORD
Legionnaires’ disease is an acute bacterial infection of the lower respiratory tract. Among the elderly and persons whose body resistance is weakened by other concurrent illnesses, the infection can be fatal. The disease is caused by the inhalation of tiny water droplets containing the legionella bacteria which thrive in poorly maintained cooling towers. Proper maintenance of cooling towerswith regular mechanical cleaning, and routine treatment with biocides is therefore important and necessary.
To minimise the risk of outbreaks of legionnaires’ disease in Singapore, the Institute of Environmental Epidemiology, Ministry of the Environment, in consultation with other government departments and professional bodies, formulated this Code of Practice for the control of legionella bacteria in cooling towers. It is intended for building owners/management corporations of centrally air-conditioned offices and factories, contractors involved in the servicing and maintenance of cooling towers, and others responsible for the design, operation and maintenance of air-conditioned buildings.
This document specifies the design, construction and location of cooling towers. It also provides guidelines on servicing and maintenance of cooling towers. It includes a checklist for assessment of health risk of cooling towers and emergency remedial measures in the event of an outbreak.
Building owners/management corporations are reminded that based on the Environmental Public Health (Cooling Towers and Water Fountains) Regulations 2001, it is an offence to operate cooling towers that are grossly contaminated and pose a health hazard.
WANG NAN CHEE
COMMISSIONER OF PUBLIC HEALTH
MINISTRY OF THE ENVIRONMENT
SINGAPORE
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