TABLE OF CONTENTS

 

11........... Environmental Monitoring and Audit Requirements. 11-1

11.1........ Introduction. 11-1

11.2........ Air Quality Impact 11-1

11.3........ Noise Impact 11-1

11.4........ Water Quality Impact 11-2

11.5........ Waste Management Implication. 11-2

11.6........ Land Contamination. 11-2

11.7........ Ecological Impact (Terrestrial and Aquatic) 11-3

11.8........ Landscape and Visual Impact 11-3

11.9........ Hazard to Life. 11-4

 

 

 

 

 

 


11                 Environmental Monitoring and Audit Requirements

11.1              Introduction

11.1.1.1        This section provides a summary of the requirements of environmental monitoring and audit (EM&A) for the construction and operational phases of the Project and associated works based on the assessment results of the various environmental issues. Details of the EM&A requirements are provided in a stand-alone EM&A Manual.

11.1.1.2        The purpose of the EM&A programme is to ascertain and verify the assumptions implicit to, and accuracy of, EIA study predictions. The EM&A programme includes the scope of the EM&A requirements for the Project to ensure compliance with the EIA study recommendations, to assess the effectiveness of the recommended mitigation measures.

11.2              Air Quality Impact

11.2.1          Construction Phase

11.2.1.1        EM&A for potential dust impacts should be conducted during construction phase so as to check compliance with the legislative requirements.  Details of the monitoring and audit programme are contained in a stand-alone EM&A Manual.

11.2.1.2        Regular site audits for potential dust impacts are recommended to be conducted during the entire construction phase of the Project so as to ensure the implementation of the dust mitigation measures and the dust suppression measures stipulated in Air Pollution Control (Construction Dust) Regulation.

11.2.2          Operation Phase

11.2.2.1        No adverse air pollutant emissions impact would be generated during the operation phase of this Project. Therefore, the Environmental Monitoring and Audit (EM&A) works related to air quality during the operational phase is considered not necessary.  However, commissioning test should be conducted for the CHP units and the boiler to ensure proper operation of the facilities.  Nevertheless, as H2S is a major emission source from effluent polishing plant, it is recommended to conduct the odour monitoring in terms of hydrogen sulphide (H2S) at the deodourizers upon commissioning and in the first three years to determine whether it can meet the 95% odour removal performance requirement.  Upon the third-year monitoring, the odour monitoring should be reviewed and agreed with EPD if the monitoring is required to be continued.  An Odour Complaint Registration System is also proposed in the EM&A programme to check whether the deodorizing units can fulfill the recommended odour removal performance.  In addition, odour patrol should be carried out during regular and ad hoc maintenance or cleaning of the deodourizers after operation of YLSEPP to ensure no adverse odour impact arisen from the operation of the YLSEPP.  Details of the monitoring and audit programme are contained in a stand-alone EM&A Manual.

11.3              Noise Impact

11.3.1          Construction Phase

11.3.1.1        Noise monitoring is recommended as part of the EM&A programme for the construction phase of the Project to check compliance with the daytime construction noise criterion.  The implementation of the recommended mitigation measures for daytime construction activities should also be audited as part of the EM&A programme.

11.3.2          Operation Phase

11.3.2.1        No adverse noise impact is anticipated due to the operation of the YLSEPP.  Commissioning test should be conducted prior to operation of the Project to ensure fixed plant noise impact would comply with the relevant noise standards.  No operational noise monitoring is therefore deemed necessary.

11.4              Water Quality Impact

11.4.1          Construction Phase

11.4.1.1        The potential water quality impact from land-based construction works can be controlled by the recommended mitigation measures.  Nonetheless, in view of that the Project site is surrounded by ecological sensitive areas, water quality monitoring and regular site inspections should be undertaken during the construction to ensure the recommended mitigation measures are properly implemented.  A WPCO license should be obtained if there has construction drainage discharge.  Self-monitoring and reporting should be carried out for monitoring the construction drainage discharge in accordance with the WPCO license.

11.4.2          Operation Phase

11.4.2.1        Under normal operation of YLSEPP, monitoring of the treated effluent quality will be governed by the WPCO license to ensure that the effluent quality would comply with the design standards, which is under the ambit of RO of EPD.

11.4.2.2        Water quality monitoring is recommended for the first year of normal operation and emergency discharge of YLSEPP.  Detailed environmental monitoring procedures are provided in the standalone EM&A manual.

11.5              Waste Management Implication

11.5.1          Construction Phase

11.5.1.1        It will be the contractor’s responsibility to ensure that any waste produced during the construction and demolition works are handled, stored and disposed of in accordance with recommended good waste management practices and relevant regulations and other legislative requirements.  The recommended mitigation measures detailed in Section 6.6 should form the basis of the site Waste Management Plan (WMP) to be developed by the Contractor in the construction stage.

11.5.1.2        It is recommended that the waste arisings generated during the construction activities should be audited regularly by the Environmental Team (ET) to determine if wastes are being managed in accordance with approved procedures. The audits should look at all aspects of on-site waste management practices including waste generation, storage, recycling, transport and disposal. Apart from site inspections, documents including licenses, permits, disposal and recycling records should be reviewed and audited for compliance with the legislation of the recommended good site practice and other waste management mitigation measures.

11.5.2          Operation Phase

11.5.2.1        Adverse environmental impacts generated from handling, storage and disposal of waste are not expected from the operation of the Project with the implementation of good waste management practices. Therefore, waste monitoring and audit programme for the operation phase of the Project would not be required.

11.6              Land Contamination

11.6.1.1        Remediation works, if necessary, would be carried out based on the recommended further works outlined in Section 7.8.1. Mitigation measures as recommended in the future EPD approved RAP should be implemented during the remediation works. The EM&A requirements should be carried out in the form of regular site inspection to ensure the recommended mitigation measures are properly implemented.

11.7              Ecological Impact (Terrestrial and Aquatic)

11.7.1          Construction Phase

11.7.1.1        Ecological indirect impacts arising from the construction of the Project, such as noise, dust, glare disturbances, water quality reduction etc, are anticipated to be low, no mitigation measures are required.  Precautionary measures and enhancement opportunities to further minimise any potential environmental impacts and promote the ecological value of the Project are recommended.  As such, specific environmental monitoring and auditing for ecological impact would not be necessary.

11.7.2          Operation Phase

11.7.2.1        Ecological indirect impacts arising from the operation of the Project, such as noise, dust, glare disturbances, water quality reduction etc, are anticipated to be low, no mitigation measures are required.  Precautionary measures and enhancement opportunities to further minimise any potential environmental impacts and promote the ecological value of the Project are recommended.  As such, specific environmental monitoring and auditing for ecological impact would not be necessary.

11.8              Landscape and Visual Impact

11.8.1          Introduction

11.8.1.1        The EIA Report has recommended landscape and visual mitigation measures for the construction and operation phases of the Project. This section defines the audit requirements to confirm the recommended landscape and visual impact mitigation measures are effectively implemented.

11.8.1.2        Site audit on landscape and visual aspects of the Project should be carried out during the construction phase.  With the mitigation measures recommended in the EIA implemented, specific auditing during the operation phase of the Project is not required.

11.8.2          Mitigation Measures

11.8.2.1        The landscape and visual mitigation measures should be incorporated in the detailed design. The mitigation measures during construction and operation phases as recommended in the EIA Report are presented in Table 12.1.  Where feasible, the construction phase mitigation measures should be implemented as early as possible in order to minimize the landscape impacts in the construction stage while the mitigation measures for the operation phase should be adopted during the detailed design and be built as part of the construction works so that they are in place before commissioning of the Project.

11.8.2.2        Any potential conflicts among the proposed mitigation measures, the Project works, and operational requirements should also be identified and resolved at early stage. Any changes to the mitigation measures should be incorporated in the detailed design. 

11.8.3          Audit Requirements

11.8.3.1        Site audits should be undertaken during the construction phase and the 12-month establishment period (operation phase) to check that the proposed landscape and visual mitigation measures are properly implemented and maintained as per their intended objectives. 

11.8.3.2        The ET shall audit the implementation of landscape construction works particularly during site clearance operations when the proposed tree felling will take place and subsequent tree maintenance operations and planting works.

11.8.3.3        Site inspections should be undertaken by the ET at least once every month during the construction period, and once every two months for the 12-month establishment period during operation phase.

11.9              Hazard to Life

11.9.1.1        The EIA study concluded that no unacceptable risk is anticipated during the operation phase of the Project, no mitigation measures would be required. Good safety practices and recommended design measures are recommended to further manage and minimize the potential risks during operation phase of the Project. No environmental monitoring and audit requirements would be required.