10.                ECOLOGY

10.1                 Introduction

10.1.1                           Not applicable

10.1.2A            While the HKBCF reclamation works are under a separate design and construction consultancy, this Contract only covers HKBCF superstructure and infrastructure works. No marine transportation will be expected. No significant ecological impacts are anticipated from this land-based construction assignment. The implementation of recommended mitigation measures during the construction of superstructures and infrastructures are presented in the following section.

10.2                Ecological Mitigation Measures and Implementations

Marine Water Quality

10.2.1                  Not applicable

10.2.2                  Not applicable

10.2.3                  Not applicable

10.2.4A            Good Site Practices: – Effluent monitoring should be incorporated to make sure that the discharged effluent from construction sites meets the relevant effluent discharge guidelines.

10.2.5                           Strict enforcement on No-dumping – To avoid degrading the Chinese White Dolphin habitat, restrictions prohibiting dumping of rubbish, food, oil, or chemicals will be strictly enforced.

10.2.6                  Site runoff control - For works on land, standard site runoff control measures will be established and strictly enforced to ensure that discharge of contaminated or silt-laden runoff into North Lantau waters is minimised.

10.2.7A            Spill response plan – To minimise the adverse effects to marine ecology in the event of accidental spillage of oil or other hazardous chemicals, a spill response plan, with specific provisions for protecting marine ecology and dolphins, will be formulated.

10.2.8                           Not applicable

Terrestrial Disturbance

10.2.9                  The impact from this minor and short-term source can be reduced by good site practice, including strictly following the permitted works hours, using quieter machines where practicable, and avoiding excessive lightings during night time.

Sedimentation from Land-based works areas

10.2.10            Not applicable

Marine Noise and Disturbance

1)     Bored piling

10.2.11            Not applicable

10.2.12            Not applicable

10.2.13            Not applicable

2)     Sheet piling

10.2.14            Not applicable

10.2.15            Not applicable

3)     Reclamation and Works Vessels

10.2.16            Not applicable

10.2.17            Not applicable

10.2.18            Not applicable

Marine Traffic

10.2.19            Not applicable

10.2.20            Not applicable

10.2.21            Not applicable

Road Surface Runoff

10.2.22            Silt-grease traps should be deployed to prevent a direct input of road surface runoff to the marine waters.

Chemical spillage

10.2.23            A Maritime Oil Spill Response Plan (MOSRP) has been developed by Marine Department to deal with oil spill and their potential hazard to the Hong Kong waters. The main objective of the MOSRP is to ensure a timely and effective response to oil spillages and/or their potential treats in the Hong Kong waters.

10.2.24            Similar to the Shenzhen Western Corridor project, a contingency plan will be formulated to deal with the accidental event of the serious spillage of oil or other harmful chemicals. A contingency plan in this regard will be primarily for safety issues and water quality, but could also help to safeguard the dolphin population. Following the example of Shenzhen Western Corridor, it will be specified in the contingency plan that AFCD must be alerted by the Hong Kong Police Force or Fire Service Department in case an accident of spillage of chemical or oil is reported.

Precautionary/Enhancement Measures

10.2.25            Not applicable

10.2.26            Not applicable

10.2.27            Not applicable

10.3                Monitoring and Audit for Ecology

10.3.1A    An ecological monitoring and audit programme would be needed for the Project HKLR and HKBCF developments. The monitoring programme will include monitoring of physical parameters such as air, noise and water quality, and ecological aspects such as Chinese White Dolphin. The ecological monitoring and audit programme will monitor potential impacts through construction and operation activities, and will verify the assessments which were made in the EIA report. The monitoring includes the following tasks:

10.3.2A    Dolphin monitoring – A dolphin monitoring programme at Northeast and Northwest Lantau, in particular the dolphin sighting hotspots (e.g. Brothers Islands) and areas where juveniles have been sighted,  should be set up to verify the predictions of impacts and to ensure that there are no unforeseen impacts on the dolphin population during construction phase.  

10.3.3                           Not applicable

10.3.4                                              Not applicable

10.3.5                                              Not applicable

10.3.6                                              Not applicable

10.3.7A    The ecological monitoring surveys shall be undertaken by suitably qualified dolphin specialist(s), who shall have sufficient (at least 5-10 years) relevant post-graduate experience and publication in the respective aspects. Approval on the specialist(s) responsible for ecological monitoring survey shall be sought from AFCD and EPD.

10.4                Monitoring Locations

10.4.1A    Dolphin monitoring – the dolphin monitoring should adopt line transect vessel survey method, and cover the following line-transect survey areas as in AFCD annual marine mammal monitoring programme:

n   Northeast Lantau survey area; and

n   Northwest Lantau survey area

10.5                Baseline Monitoring for Ecology

10.5.1A   Baseline for dolphin monitoring shall be established by two surveys per month in each survey area stated in Section 10.4.1A for a period of three months prior to the commencement of works and agreed with AFCD. The purpose of the baseline monitoring is to establish pre-construction conditions prior to the commencement of the works and to demonstrate the suitability of the proposed monitoring method.

10.5.1                           Not applicable

10.5.2                           Not applicable

10.5.3                           Not applicable

10.5.4                           Not applicable

10.5.6A    The baseline monitoring was undertaken for the Project between September and November 2011 under Agreement CE No.35/2011 (EP) “Baseline Environmental Monitoring for Hong Kong–Zhuhai-Macao Bridge Hong Kong Projects – Investigation” prior to commencement of construction of the Project. The baseline monitoring results obtained under Agreement CE No.35/2011 (EP) will be adopted for this Contract.

10.6                Impact Monitoring for Ecology

10.6.1     Not applicable

10.7                Post-construction Monitoring for Ecology

10.7.1A    The dolphin monitoring will be conducted in the post-construction phase at least for 2 year after completion of construction. The post-construction monitoring will be carried out twice a month in each survey area stated in Section 10.4.1A.

10.7.2A    The post-construction dolphin monitoring for HKBCF for the period between March 2019 and February 2020 was conducted under Contract No. HY/2013/04 and Contract No. HY/2019/01 continued the monitoring since March 2020.

10.8                Event and Action Plan

Not applicable