Compliance with relevant air quality standard requirement
To obtain more reliable wind data for odour impact assessment , we have engaged the City University of Hong Kong to conduct a wind tunnel test for analysing the wind speed and wind direction at the proposed relocation site (Nui Po Shan of A Kung Kok) and develop the wind rose for the site.
Based on the wind tunnel test data, the feasibility study consultant completed the odour impact simulation and preliminarily determined the most appropriate location for the ventilation shaft. The feasibility study consultant predicted that, through implementing appropriate odour control measures and siting the ventilation shaft at remote location on the hill, the air quality at the nearby estates/ villages (e.g. Chevalier Garden, Kam Tai Court, A Kung Kok Fishermen Village, Tai Shui Hang Village, Mui Tsz Lam Village, etc.) will be far below the requirement of 5 odour units (OU) as stated in the Environmental Impact Assessment Ordinance.
|Nearby Estate /
|Distance from Ventilation Shaft (about)
Odour Level (OU)
||Vertical Distance from Rooftop
Kam Tai Court
A Kung Kok
Tai Shui Hang Village
Mui Tsz Lam Village
Preliminarily Proposed Odour Control Measures
- Caverns as natural barriers for more effective odour control
- Covering up of odour sources
- Installation of deodourising units to clean up the collected foul air
- Discharging exhaust air at height to further enhance the
- Adopting sludge carrying vehicles with enclosed containers
In the investigation and design stage, we will conduct the environmental impacts assessment, including odour impact assessment, and propose suitable mitigation measures to ensure the compliance with the relevant requirements.