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Controlling Air Pollution
in Construction and Demolition
It is a standard practice in our construction and
demolition contracts to require our engineering contractors implement all
practicable means to avoid or otherwise control dust and exhaust emissions
from construction vehicles.
We specify air pollution control requirements in our contract specifications
and we follow this up with assessment methods such as the Performance Assessment
Scoring System that are applied to all building contracts.
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Minimizing
Ozone Layer Destruction
Ozone is a gas that protects the earth's surface from harmful ultraviolet
radiation from the sun, and so helps to protect us from skin cancer and
other illnesses. The existence of the ozone-hole in our atmosphere has therefore
made society aware of the impact of ozone depleting compounds such as chlorofluorocarbons
(CFCs).
CFCs have in the past been used in aerosols and as cooling agents in refrigeration
systems, chillers and air conditioners.
To play an active role in protecting our world, the Housing Authority has banned the use of ozone-depleting refrigerants in all of our central air conditioning systems and retrofitted / replaced all affected chillers with CFC-free refrigerants.
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Controlling
Odour and Exhausts in Our Estates
Odour can be a nuisance at our wet markets and refuse
collection points. To deal with the odour problem, over the past few years
we have completed a number of air quality enhancement initiatives. These
include testing the effectiveness of various deodorization systems, installation
of over 50 biotechnology equipment items at refuse collection points and
150 packaged deodourizers in the refuse rooms of our public housing estates.
Following the success of these initiatives, we shall introduce more of these
installations into our refuse management facilities.
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Enhancing
Indoor Air Quality
Maintaining good indoor air quality is important if we are to maintain good
health. Following the outbreak of SARS last year, we began to increase the
fresh air intake rates in our shopping centres to improve the indoor air
quality.
During the year 2003 / 04 we extended our efforts by:
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Launching of a trial scheme for use of Gas Desiccant
Dehumidification System equipped with air-conditioning in wet markets
to maintain a level of humidity that limits bacterial growth; and |
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Installation of ultra-violet radiation lighting in
wet markets to aid the disinfection of airborne bacteria. |
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