Nam Cheong Station in West Kowloon

The project was to construct the Nam Cheong station in West Kowloon.

Environmental Concern Effluent from the construction site would contain very high level of sand and silt if it was not properly treated before discharging into storm drains. Accumulation of excessive sand and silt in storm drains, if allowed, would cause flooding during raining seasons.

Muddy water generated from construction works

Measures Adopted

Treatment - Concrete lined perimeter channels were provided to divert wastewater to the chemically assisted sedimentation tank which was used to enhance suspended solids removal from the construction wastewater.

Recycling - Wastewater was recycled to minimise the discharge of wastewater into the drainage system.

Dust Screen - Exposed surfaces and open stockpiles of construction materials were covered by tarpaulin to prevent the construction materials, soil, silt and debris from being washed away into the drainage system during rainstorms.

Monitoring - Environmental monitoring was conducted by an independent consultant to ensure the mitigation measures being properly conducted.

Muddy water being treated in the chemically assisted sedimentation tank	Fully treated effluent being discharged from the treatment plant
Exposed surface covered by tarpaulin	Concrete lined perimeter channels for diverting wastewater to the treatment plant

Observations & Achievements

With the effective implementation of the proper on-site treatment in separating suspended solids from the wastewater and the recycling of the vehicle washing water, the effluent discharged from the construction site was minimised and the downstream drainage system was properly protected.