Agreement No. CE 35/2006(CE)

Kai Tak Development Engineering Study

cum Design and Construction of Advance Works

– Investigation, Design and Construction



Decommissioning of the former kai tak airport

other than the north apron

environmental monitoring and audit manual






4............ WATER QUALITY IMPACT. 19

4.1        Introduction. 19

4.2        Site Audits. 19




List of Appendices

Appendix B       Iimplementation Schedule of the Recommended Mitigation Measures

4                          WATER QUALITY IMPACT

4.1                    Introduction

4.1.1               No off-site marine water quality impact would be expected from decommissioning of the fuel dolphin and given that there would not be any marine-based works for the proposed decommissioning works at the south apron and runway area, water quality monitoring is not considered necessary. However, it is recommended that regular site audits be undertaken to inspect the decommissioning activities and works areas in order to ensure the recommended mitigation measures are properly implemented. Proposed mitigation measures for containing and minimizing water quality impacts are listed in the implementation schedule given in Appendix B.

4.2                    Site Audits

4.2.1               Implementation of regular site audits is to ensure that the recommended mitigation measures are to be properly undertaken. It can also provide an effective control of any malpractices and therefore achieve continual improvement of environmental performance on site.

4.2.2               Site audits shall include site inspections and monitoring audits.

Site Inspections

4.2.3               Site inspections shall be carried out by the ET and shall be based on the mitigation measures for water pollution control recommended in the implementation schedule as attached in Appendix B. In the event that the recommended mitigation measures are not fully or properly implemented, deficiency shall be recorded and reported to the site management. Suitable actions are to be carried out to:

·            Investigate the problems and the causes;

·            Issue action notes to the Contractor which is responsible for the works;

·            Implement remedial and corrective actions immediately;

·            Re-inspect the site conditions upon completion of the remedial and corrective actions; and

·            Record the event and discuss with the Contractor for preventive actions.

Monitoring Audits

4.2.4               Monitoring audits are to be undertaken to ensure that a valid discharge license has been issued by EPD prior to the discharge of effluent from the Project site.  Besides, regular monitoring of the treated effluent quality from the centralized wastewater treatment unit and stormwater discharges from major storm outfalls within the works areas will be conducted.  Monitoring parameters should constantly include SS, turbidity, oil and grease, COD and less frequently include TPH, BTEX and selected metals.  Parameters included in the WPCO licence, will also be included in the monitoring programme.  The chemical testing of water samples collected in the monitoring programme should be undertaken by a Hong Kong Laboratory Accreditation Scheme (HOKLAS) accredited laboratory.  Detail monitoring programme / plan will be submitted at later stage for EPD's agreement.  The audit results reflect whether the effluent quality is in compliance with the discharge license requirements and that the recommended water quality mitigation measures are properly implemented.  In case of non-compliance, suitable actions should be undertaken to:

·            Notify the site management for the non-compliance;

·            Identify the sources of pollution;

·            Check the implementation status of the recommended mitigation measures;

·            Investigate the operating conditions of the on-site treatment systems;

·            Implement corrective and remedial actions to improve the effluent quality;

·            Increase monitoring frequency until the effluent quality is in compliance with the discharge licence requirements; and

·            Record the non-compliance and propose preventive measures.