16.                    Environmental Monitoring and Audit


16.1                Introduction


16.1.1            This section further elaborates the requirements of environmental monitoring and audit (EM&A) for the construction and operation phases of the Project, based on the assessment results of the various environmental issues.  The objectives of carrying out EM&A for the Project include the following:

·         Provide a database against which any short or long term environmental impacts of the Project can be determined

·         Provide an early indication should any of the environmental control measures or practices fail to achieve the acceptable standards

·         Monitor the performance of the Project and the effectiveness of mitigation measures;

·         Verify the environmental impacts predicted in the EIA study

·         Determine project compliance with regulatory requirements, standards and government policies

·         Take remedial action if unexpected problems or unacceptable impacts arise

·         Provide data to enable an environmental audit.


16.1.2            The following sections summarise the recommended EM&A requirements for the Project.  Details of the specific requirements are provided in a stand-alone EM&A Manual.


16.2                Air Quality Impact


Construction Phase


16.2.1            The construction work is controlled by the Air Pollution Control (Construction Dust) Regulation, and mitigation measures such as frequency of watering on the work site are required under the regulation to limit dust emission.  Dust monitoring is required during construction phase of the Project.  Dust monitoring and site audit requirement have been recommended in the EM&A Manual to ensure that the mitigation measures are to be properly implemented.

Operational Phase


16.2.2            No operation air quality would be expected and therefore no monitoring and audit is required during operation phase. 


16.3                Noise  Impact


Construction Phase


16.3.1            Construction noise impacts from this Project are predicted at the identified NSRs. Appropriate mitigation measures would be required in order to alleviate the noise impacts to meet the EIAO-TM criteria. Noise monitoring during construction phase should be carried out to ensure such mitigation measures would be implemented properly.


Operational Phase


16.3.2            After completion of WCR, CBL & Road P2 and the associated Road D4 Flyover, traffic noise monitoring should be carried out at the NSRs in the vicinity of the recommended direct mitigation measures at these roads.  The purpose of this monitoring is to ensure that the proposed mitigation measures are effective to alleviate traffic noise impact.  The Civil Engineering and Development Department will be responsible for the operational phase monitoring.  Qualified environmental team should be employed to carry out the proposed monitoring. The parameters, monitoring equipment, locations and procedures are presented in detail in the EM&A Manual.

16.3.3            Noise monitoring for WCR Eastern Portal Ventilation Building is recommended to carry out to ensure that the noise levels at closest NSRs meet the EIAO standard.  Noise measurements shall be made in accordance with the procedures outlined in the Technical Memorandum for the Assessment of Noise from Places other than Domestic Premises, Public Places and Construction Sites, and shall be conducted when the ventilation building is operating at its maximum capacity.  Further information for fixed noise monitoring is addressed in the noise section of the EM&A Manual.


16.4                Water Quality Impact


Operational Phase


16.4.1            It is recommended to implement a 3-year post-project monitoring programme at Eastern Drainage Channel (EDC) to confirm the suitability of the proposed recreation uses at EDC. 

16.4.2            In any event of emergency sewage bypass, the proposed recreation zone in EDC and Junk Bay will be closed. Water quality monitoring should be carried out by DSD to determine when conditions are suitable for re-opening of the EDC and Junk Bay for recreational purposes.  Marine water quality parameters such as E. coli and DO should be monitored.  The EDC and Junk Bay should not be re-opened for water sports activities until the water quality meets the relevant target objectives for secondary contact recreation.

Construction Phase


16.4.3            Monitoring of the discharge quality of effluent from land-based construction sites should be conducted by the relevant contractor.  Detailed effluent sampling programme for water quality control during construction phase should be submitted to EPD for approval prior to commencement of the construction works. 

16.4.4            During the field trial of DCM, a water quality monitoring programme should be implemented to confirm the water quality impact before the full-scale implementation of DCM for seawall construction. 

16.4.5            Water quality monitoring should also be carried out by the relevant contractor at selected stations before and during the WCR reclamation activities.  Monitoring parameters should include turbidity, SS and DO.  If monitoring results indicate that the reclamation activities caused a significant impact to the sensitive receivers even after implementation of the mitigation measures recommended in the EIA, re-scheduling of construction programmes might need to be considered to slow down construction activities (e.g. to reduce the number of plant) to minimise the impacts.

16.4.6            A water quality monitoring programme should be implemented during the field trial of DCM by the relevant contractor to confirm the water quality impact before the full-scale implementation of DCM for seawall construction. The extent of the monitoring programme would be subject to the design and scale of the field trial to be determined during the detailed design stage of the Project.  Details of the monitoring programme should be provided during the design stage and submitted to EPD for endorsement before conducting the DCM field trial.

16.5                Terrestrial Ecology


16.5.1            Monitoring requirements for terrestrial ecology are outlined in section 7.10 of the Report. In summary, monitoring would include:

·         The implementation of all mitigation measures described in Section 7.8 should be subject to regular audit.

·         Following transplantation, the health and condition of individuals of the two plant species of conservation interest affected by the proposed works (Small Persimmon, Diospyros vaccinioides and Bamboo Orchid, Arundina chinensis) should be monitored.

·         Monitoring and audit of the mitigation measures recommended for the Philippine Neon Goby would be implemented.


16.6                Marine Ecology


16.6.1            Monitoring requirements for marine ecology are outlined in section 8.10 of the Report. In summary, monitoring would include:

·         The implementation of all mitigation measures and water quality monitoring and audit described in section 5 should be implemented.

·         It is recommended that the feasibility of transplanting potentially impacted hard corals from the reclamation area to suitable nearby habitats be investigated during the detailed design stage of the Project. If corals suitable for transplantation are identified during these surveys, a detailed transplantation methodology (including monitoring of transplanted corals) should be drafted during the detailed design stage of the Project.

·         Medium value coral sites within Junk Bay should be monitored during dredging works for Phase I of the WCR reclamation is recommended. The EM&A would serve the purpose of protecting coral sites in Junk Bay and ensuring the environmental acceptability of the Project.

·        Monitoring of re-colonisation of the WCR reclamation rubble sea-wall should be implemented.

·        Implementation of measures to mitigate impacts to Grassy Puffers.


16.7                Fisheries Impact


16.7.1            Environmental monitoring and audit programme designed for protection against unacceptable water quality impacts will also serve to protect against unacceptable impacts to fisheries.  Environmental monitoring and audit to assess the impacts of the Project on commercial fisheries resources and operations is deemed not necessary.


16.8                Landscape and Visual Impact


Construction Phase


Baseline Review


16.8.1            A Baseline Review shall be undertaken at the commencement of the construction contracts.  The purpose of the review is:

·         To check the status of the landscape resources within, and immediately adjacent to, the construction works sites and works areas;

·         To determine whether any change has occurred to the status of the landscape resources since the EIA;

·         To determine whether such change warrants a change in the design of the landscape and visual mitigation measures; and

·         To recommend any changes to the design of the landscape and visual measures.


Monitoring of Design, Construction and Establishment Works


16.8.2            The design, implementation and maintenance of landscape and visual mitigation measures shall be checked to ensure that they are fully realised and that any potential conflicts between the proposed landscape measures and any other project works and operational requirements are resolved at the earliest possible date and without compromise to the intention of the mitigation measures.

Design of Landscape and Visual Mitigation Measures


16.8.3            The detailed design of the landscape and visual mitigation measures shall be undertaken so as to ensure compliance with the measures described in Sections 10.7 and 10.8, and to ensure compliance with the intended aims of the measures, taking into account any changes to the mitigation measures that may have been recommended as a result of the Baseline Review or ongoing monitoring of the Design, Construction and Establishment Works.

Site Supervision of Landscape Works


16.8.4            The implementation of the landscape works during the Construction Phase and Establishment Works shall be supervised by qualified Landscape Resident Site Staff who shall be a Registered Landscape Architect, or a Professional Member of the Hong Kong Institute of Landscape Architects.

Operational Phase


Monitoring of Landscape Establishment


16.8.5            All landscape and visual mitigation measures shall be monitored during the first 10 years of the Operational Phase to check that the intended mitigation effects are realised.


16.9                Waste Management Implications


16.9.1            Waste management will be the contractor’s responsibility to ensure that all wastes produced during the construction of the Project are handled, stored and disposed of in accordance with the recommended good waste management practices and EPD’s regulations and requirements.  The mitigation measures recommended in Section 7 should form the basis of the site Waste Management Plan to be developed by the Contractor at the construction stage.

16.9.2            It is recommended that the waste arisings generated during the construction activities should be audited periodically to determine if wastes are being managed in accordance with approved procedures and the site Waste Management Plan.  The audits should look at all aspects of waste management including waste generation, storage, recycling, transport and disposal.  An appropriate audit programme would be to undertake a first audit near the commencement of the construction works, and then to audit on a quarterly basis thereafter.  In addition, the routine site inspections should check the implementation of the recommended good site practices and other waste management mitigation measures.


16.10            Impact on Cultural Heritage


16.10.1         To ensure no damage to the temple, it is recommended that monitoring of vibration impacts be conducted when the construction works are less than 50m from the temple.  All measures undertaken by the Contractor during the construction phase in the vicinity of the Cha Kwo Ling Tin Hau Temple should be audited on a regular basis to ensure compliance with the intended aims of the recommended mitigation measures.  Site inspections should be undertaken at least once per month throughout the construction period adjacent to the temple, to avoid any possible damage through on-site liaison with the Contractor.


16.11            Landfill Gas Hazard Assessment


16.11.1         A landfill restoration monitoring programme, conducted on a monthly basis, is part of the Restoration Contract for TKO Stage I & Stage II/III Landfill and Sai Tso Wan Landfill. However, landfill gas monitoring is still considered necessary during the construction and operational phase in order to identify any migration between the landfill and the site and to ensure the safety of the Contractor’s personnel.

16.11.2         During construction activities within 250m Consultation Zones of Sai Tso Wan Landfill, Tseung Kwan O Stage I Landfill and Tseung Kwan O Stage II & III Landfill, portable gas detectors should be used regularly to check the levels of methane, carbon dioxide and oxygen in depressions, trenches, and excavations. The regular monitoring should be undertaken at least for the beginning of each half working day (i.e. morning and afternoon) for the entire period the excavation remains open.

16.11.3         During the operational phase, atmosphere within utility manholes and chambers should be checked for methane, carbon dioxide and oxygen prior to entry. The Code of Practice on Safety and Health at Work in Confined Space should be strictly followed before entering into the utility manholes and chambers.  Routine landfill gas surveillance exercise should also be undertaken by the utility companies when there are inspection at the manholes and chambers.  Undertaken for the duration of the site occupancy, or until such time that EPD agree that surveillance is no longer required and this should be based on all the available monitoring data for methane, carbon dioxide and oxygen.