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 Impact Assessment Report
Contents
10........ ENVIRONMENTAL MONITORING AND AUDIT
10.2 Land Contamination Impact
10.3 Waste Management Implications
10.7 Impact on Cultural Heritage
10.1.1 This section further elaborates the requirements of EM&A for the Project, based on the assessment results of various environmental issues.
10.1.2 The objectives of carrying out EM&A for the Project include the following:
· To provide a database against which any environmental impacts of the Project can be determined;
· To provide an early indication should any of the environmental control measures or practices fail to achieve the acceptable standards;
· To monitor the performance of the Project and the effectiveness of mitigation measures;
· To verify the environmental impacts predicted in this EIA;
· To determine project compliance with regulatory requirements, standards and government policies;
· To take remedial action if unexpected problems or unacceptable impacts arise; and
· To provide data to enable an environmental audit.
10.1.3 The following sub-sections summarise the recommended EM&A requirements. Details of EM&A are provided in a stand-alone EM&A Manual.
10.2 Land Contamination Impact
10.2.1 As recommended in Section 3, the contaminated soil should be excavated and treated on-site by biopiling and/or solidification / stabilization while the TPH free product should be skimmed, containerised and collected for proper disposal. In order to gauge the effectiveness of the remedial system and minimise the potentially adverse environmental impacts arising from the handling of potentially contaminated materials, the recommended environmental mitigation and safety measures, progress monitoring and/or confirmation sampling / testing recommended during the course of remedial works. In addition, IEC should carry out independent checking on performance of decontamination works. The mitigation measures recommended in Section 3 should be implemented during the decommissioning / decontamination works of the Project. Detailed requirements are provided in a stand-alone EM&A Manual.
10.3 Waste Management Implications
10.3.1 Waste management will be the contractor’s responsibility to ensure that all wastes produced during the decommissioning works 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 4 should form the basis of the site Waste Management Plan to be developed by the contractor at the construction stage.
10.3.2 It is recommended that the waste arisings generated during the decommissioning works 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, 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 measures.
10.4.1 No off-site water quality impact would be expected from the proposed decommissioning and decontamination activities, marine water quality monitoring is not considered necessary. It is recommended that regular site inspections be undertaken to inspect the decommissioning activities and works areas in order to ensure that the recommended mitigation measures are properly implemented. 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.
10.5.1 With the implementation of the recommended air quality mitigation measures, good site practices, and dust and VOC monitoring (including VOCs monitoring at biopiling discharge and ambient monitoring of VOCs at the site boundary) and audit programme, acceptable air quality impact would be expected at the ASRs. Details of EM&A Programme are provided in the EM&A Manual.
10.6.1 No adverse construction noise impact is expected at the NSRs in the vicinity of the work sites due to large separation distance between the construction sites and the nearby NSRs, construction noise monitoring is not proposed. However, regular site audit is required to ensure proper implementation of good site practices. Details of the EM&A programme are provided in a stand-alone EM&A Manual.
10.7 Impact on Cultural Heritage
10.7.1 The assessment concluded that all the examined heritage resources are of low cultural heritage significance and none of the heritage resources examined will be affected by this Project, no monitoring and audit programme specific for cultural heritage would be required.
10.8.1 As water quality impact assessment suggested that change of water quality within the assessment area would be minor and acceptable during the construction phase and no ecological sensitive receivers was identified within the assessment area, no monitoring programme specific for marine ecology would be required.