1. BACKGROUND

1.1 An application (No. ESB-052/2000) for an Environmental Impact Assessment (EIA) Study Brief under section 5(1)(a) of the Environmental Impact Assessment Ordinance (EIAO) was submitted by the Applicant with a Project Profile (No. PP-086/2000).

1.2 The Applicant proposes to construct three 4-lane roads in Tseung Kwan O area, namely Roads D1, D8 and D10 and the associated road junction improvement works at road junction of Road D10/ Wan Po Road, and road junctions along Road D1 and D8. The project is a Designated Project under Schedule 2, A.1, of the EIAO: "A road which is an expressway, trunk road, primary distributor road or district distributor road including new roads, and major extensions or improvements to existing roads".

1.3 Drawing No. TKZ0095 indicates the location of these three proposed roads and the associated road junction improvement works. Roads D1, D8 and D10 are approximately 1.5 km, 0.3 km and 1.3 km in length respectively. They will be constructed mostly on existing or committed reclaimed land, except for a small section of approximately 160m of Road D10 which will pass over the Eastern Drainage Channel with piers located within the Channel. No dredging or further reclamation is required.

1.4 Pursuant to section 5(7)(a) of the EIAO, the Director of Environmental Protection (the Director) issues this Environmental Impact Assessment (EIA) study brief to the Applicant to carry out an EIA study.

1.5 The purpose of this EIA study is to provide information on the nature and extent of environmental impacts arising from the construction and operation of the proposed designated projects and related activities taking place concurrently. This information will contribute to decisions by the Director on:

(i) the overall acceptability of any adverse environmental consequences that are likely to arise as a result of the proposed project;

(ii) the conditions and requirements for the detailed design, construction and operation of the proposed project to mitigate adverse environmental consequences wherever practicable; and

(iii) the acceptability of residual impacts after the proposed mitigation measures are implemented.

2. OBJECTIVES OF THE EIA STUDY

2.1 The objectives of the EIA study are as follows:

(i) to describe the proposed project and associated works together with the requirements for carrying out the proposed project;

(ii) to describe the considerations given to different options, and the project's different sitting or alignment, including scenarios with or without the project;

(iii) to identify and describe the elements of the community and environment likely to be affected by the proposed project and/or likely to cause adverse impacts to the proposed project, including both the natural and man-made environment;

(iv) to identify and quantify emission sources and determine the significance of impacts on sensitive receivers and potential affected uses;

(v) to identify any potential landscape and visual impacts and to propose measures to mitigate these impacts;

(vi) to propose the provision of infrastructure or mitigation measures so as to minimize pollution, environmental disturbance and nuisance during construction and operation of the project;

(vii) to identify, predict and evaluate the residual (i.e. after practicable mitigation) environmental impacts and the cumulative effects expected to arise during the construction and operation phases of the project in relation to the sensitive receivers and potential affected uses;

(viii) to identify, assesses and specify methods, measures and standards, to be included in the detailed design, construction and operation of the project which are necessary to mitigate these environmental impacts and to reduce them to acceptable levels;

(ix) to investigate the extent of side-effects of proposed mitigation measures that may lead to other forms of impacts;

(x) to identify constraints associated with the mitigation measures recommended in the EIA study;

(xi) to design and specify the environmental monitoring and audit requirements, if required, to ensure the implementation and the effectiveness of the environmental protection and pollution control measures adopted; and

3. DETAILED REQUIREMENTS OF THE EIA STUDY

3.1 The Purpose

The purpose of this study brief is to scope the key issues of the EIA study. The Applicant has to demonstrate in the EIA report that the criteria in the relevant sections of the Technical Memorandum on the Environmental Impact Assessment Process of the EIAO (hereinafter referred to as the TM) are fully complied with.

3.2 The Scope

The scope of this EIA study covers the proposed project mentioned in sections 1.2 and 1.3 above.

3.3 Technical Requirements

The Applicant shall conduct the EIA study to address all environmental aspects of the activities as described in the scope as set out above. The EIA study shall include the following technical requirements on specific impacts:

3.3.1 Air Quality Impact

3.3.1.1 The Applicant shall follow the criteria and guidelines for evaluating and assessing air quality impact as stated in Annexes 4 and 12 of the Technical Memorandum, respectively.

3.3.1.2 The assessment area for air quality impact shall be defined by a distance of 500m from the boundary of the project area, yet it may be extended depending on the circumstances.

3.3.1.3 For construction impact, the Applicant shall follow the requirements of the Air Pollution Control (Construction Dust) Regulation in dust control and shall initiate an audit and monitoring program during the construction stage to ensure construction dust impacts are controlled within the relevant standards as stipulated in Annex 4 of the TM.

3.3.1.4 The operational air quality assessment shall include the following :

(i) Analysis of operational activities and their characteristics/ related air quality impact.

(ii) Presentation of background air quality in the study area for the purpose of evaluating the cumulative air quality impacts of the operational activities.

(iii) Identification and description of representative air sensitive receivers (ASRs) (both existing and planned/committed) that would likely be affected by the air emissions of the operational activities. The locations shall be agreed with the Director and a map showing the location of every identified ASR shall also be given.

(iv) Identification of emission characteristics and provision of an emission inventory of the air pollution sources.

(v) Description of the assessment method and the associated assumptions, validity of the method and limits of application. The methodology used shall be agreed with the Director prior to commencement of assessment.

(vi) Assessment and evaluation of the net and cumulative air quality impacts of the air emissions at the identified ASRs.

(vii) Presentation of the assessment results in the form of summary table and pollution contours, whenever practicable, for comparison with relevant air quality standards and for the examination of the land use implications of these impacts.

(viii) Proposals of effective mitigation measures to reduce the cumulative air pollution impacts to established standards.

(ix) If there are any direct technical noise remedies recommended in the study, the air quality implication due to these remedies shall be assessed. For instance, if barriers that will affect dispersion of air pollutants are proposed, then the implications of such remedies on air quality impact shall be assessed. If enclosure is proposed, then both "tunnel" portal emissions and air quality inside the "tunnel" shall be addressed.

(x) The EIA report submitted should include all input and output(s) of the model run(s) in electronic format.

3.3.2 Noise Impact

3.3.2.1 The Applicant shall follow the criteria and guidelines for evaluating and assessing noise impact as stated in Annexes 5 and 13 of the TM respectively.

3.3.2.2 The noise impact assessment shall include the following :

(i) Determination of Assessment Area

The noise impact assessment shall include all areas within 300m from the project boundary. Subject to the agreement of the Director, the assessment area could be reduced accordingly if the first layer of noise sensitive receivers, closer than 300m from the project boundary, provides acoustic shielding to those receivers located further away.

(ii) Provision of Background Information

The Applicant shall provide all background information relevant to the project including relevant previous and current studies. Unless involved in the planning standards, no existing noise levels are particularly required.

(iii) Identification of Noise Sensitive Receivers

(a) The Applicant shall refer to Annex 13 of the TM when identifying the noise sensitive receivers (NSRs). The NSRs shall include all existing ones and all planned or committed noise sensitive developments and uses.

(b) The Applicant shall select assessment points to represent all identified NSRs for carrying out quantitative noise assessment described below. The assessment points shall be agreed with the Director prior to the quantitative noise assessment. A map showing the location and description including name of building, use, and floors of each and every selected assessment point shall be given.

(iv) Provision of an Emission Inventory of the Noise Sources

The Applicant shall provide an inventory of noise sources including construction equipment for construction noise assessment and fixed plant equipment, as appropriate, for operational noise assessment. Confirmation of the validity of the inventory shall be obtained from the relevant government departments/authorities.

(v) Construction Noise Assessment

(a) The Applicant shall carry out assessment of noise impact from construction (excluding percussive piling) of the project during day time, i.e. 7 a.m. to 7 p.m., on weekdays other than general holidays in accordance with the methodology stipulated in paragraphs 5.3. and 5.4 of Annex 13 of the TM. The criteria in Table 1B of Annex 5 of the TM shall be adopted in the assessment.

(b) To minimize the construction noise impact, alternative construction methods to replace percussive piling shall be proposed as far as practicable.

(c) If the unmitigated construction noise levels are found to exceed the relevant criteria, the Applicant shall propose practicable direct mitigation measures (including movable barriers, enclosures, quieter alternative methods, re-scheduling and restricting hours of operation of noisy tasks) to minimize the impact. If the mitigated noise levels still exceed the relevant criteria, the duration of the noise exceedance shall be given.

(vi) Road Traffic Noise

(a) Calculation of Noise Levels

The Applicant shall analyze the scope of the proposed road alignment(s) to identify appropriate new and existing road sections for the purpose of traffic noise impact assessment. When an existing road section undergoes major modification which will directly result in 25% increase in lanes or substantial changes in alignment or characters (e.g. change to a high speed road) of the existing road, it shall be regarded as a new road for the purpose of this noise impact assessment.

The Applicant shall calculate the expected road traffic noise using methods described in the U.K. Department of Transport's "Calculation of Road Traffic Noise" (1988). Calculations of future road traffic noise shall be based on the peak hour traffic flow in respect of the maximum traffic projection within a 15 years period upon commencement of operation of the proposed roadwork. The Applicant shall calculate the traffic noise levels in respect of each road section and the overall noise levels from the combined road sections (both new and existing) at the NSRs.

(b) Presentation of Noise Levels

The Applicant shall present the prevailing and future traffic noise levels in L10, (1 hr) at the NSRs at various representative floor levels (in m P.D.) on tables and plans of suitable scale.

Quantitative assessment at the NSRs for proposed road alignment(s) shall be carried out and compared against the criteria set out in Table 1A of Annex 5 in the Technical Memorandum. The potential noise impact of proposed road alignment(s) shall be quantified by estimating the total number of dwellings, classrooms and other noise sensitive elements that will be exposed to noise levels exceeding the criteria set in Table 1A of Annex 5 in the Technical Memorandum.

(c) Proposals for Noise Mitigation Measures

After rounding of the predicted noise levels according to the U.K. Department of Transport's "Calculation of Road Traffic Noise" (1988), the Applicant shall propose direct technical remedies within the project limits in all situations where the predicted traffic noise level exceeds the criteria set in Table 1A of Annex 5 in the TM by 1 dB(A) or more. Specific reasons for not adopting certain direct technical remedies in the design to reduce the traffic noise to a level meeting the criteria in the TM or to maximize the protection for the NSRs as far as possible should be clearly quantified and laid down. The total number of dwellings, classrooms and other noise sensitive element that will be benefited by the provision of direct technical remedies should be provided.

The total number of dwellings, classrooms and other noise sensitive elements that will still be exposed to noise above the criteria with the implementation of all recommended direct technical remedies shall be quantified.

In case where a number of the NSRs cannot all be protected by the recommended direct technical remedies, the Applicant shall identify and estimate the total number of existing dwellings, classrooms and other noise sensitive elements which may qualify for indirect technical remedies under the ExCo directive "Equitable Redress for Persons Exposed to Increased Noise Resulting from the Use of New Roads", the associated costs and any implications for such implementation. For the purpose of determining the eligibility of the affected premises for indirect technical remedies, reference shall be made to the set of following three criteria:

(1) the predicted overall noise level from the new road together with other traffic noise in the vicinity must be above a specified noise level (e.g. 70 dB(A) for domestic premises and 65 dB(A) for education institutions, all in L10(1 hr));

(2) the predicted overall noise level is at least 1.0 dB(A) more than the prevailing traffic noise level, i.e. the total traffic noise level existing before the works to construct the road were commenced; and

(3) the contribution to the increase in the predicted overall noise level from the new road must be at least 1.0 dB(A).

(vii) Assessment of Side Effects and Constraints

The Applicant shall identify, assess and propose means to minimize any side effects and to resolve any potential constraints arising from the inclusion of any recommended direct technical remedies.

(viii) Evaluation of Constraints on Planned Noise Sensitive Developments/Land Uses

For planned noise sensitive uses which will still be affected even with all practicable direct technical remedies in place, the Applicant shall propose, evaluate and confirm the practicality of additional measures within the planned noise sensitive uses and shall make recommendations on how these noise sensitive uses will be designed for the information of relevant parties.

The Applicant shall take into account the agreed environmental requirements/constraints identified by the study to assess the development potential of the concerned sites which shall be made known to the relevant parties.

3.3.3 Water Quality Impact

3.3.3.1 The Applicant shall follow the criteria and guidelines for evaluating and assessing water pollution as stated in Annexes 6 and 14 of the TM, respectively.

3.3.3.2 The assessment area for the purpose of water quality impact assessment shall include the Eastern Drainage Channel and the inner Junk Bay. All physical, chemical and biological disruptions of marine, estuarine, fresh water or ground water system(s) arising during the construction, operation of the project shall be identified and analyzed in the impact assessment.

3.3.3.3 The water quality impact assessment shall address the followings:

General

(i) Collection and review of background information on the existing water system(s) including the inner Junk Bay and the Eastern Drainage Channel (EDC).

(ii) Characterization of water quality based on existing information or site surveys/tests as appropriate.

(iii) Identification and analysis of all existing and planned future activities and beneficial uses related to the water system(s) and identification of all water sensitive receivers.

(iv) Identification of pertinent water quality objectives and establishment of other appropriate water quality criteria or standards for the water system(s) and all the sensitive receivers.

(v) Review the specific construction methods and configurations, and operation of the Road D10 and Road D1 alignments along the southern and southwestern fringes of the Tseung Kwan O Stage 1 Landfill and along and across the EDC. Identification of any alteration of watercourses, change of shoreline or bathymetry, change of flow regimes, change of landfill leachate migration profile.

(vi) Identification, analysis and quantification of all existing and likely future water pollution sources, including point discharges and non-point sources to surface water runoff. Field investigation and laboratory tests shall be conducted as appropriate. Establishment and provision of an emission inventory on the quantities and characteristics of all these pollution sources.

Impacts Prediction

(vii) Prediction and quantification by mathematical modelling or other technique approved by EPD, of the impacts on the water system(s) and the sensitive receivers due to those alterations and changes identified in (v) and the pollution sources identified in (vi). Possible impacts include changes in flushing performance of the EDC, water quality arising from seepage of landfill leachate and any excavation of deposited wastes and soils and the effects on the aquatic environment due to such changes. The prediction shall take into account and include likely different construction stages or sequences, different operation stages.

(viii) Cumulative impacts due to other projects; activities or pollution sources within a boundary around the Study Area to be agreed by EPD shall also be predicted and quantified.

Waste Water and Non-point Sources Pollution

(ix) Analysis on the provision and adequacy of existing and planned future facilities to reduce pollution arising from the non-point sources identified in (vi).

Mitigation

(x) Proposal of effective and practicable infrastructure upgrading or provision, water pollution prevention and mitigation measures to be implemented during the construction, operation stages so as reduce the water quality impacts to within acceptable levels of standards. Requirements to be incorporated in the project contract document shall also be proposed.

(xi) Best management practices to reduce storm water and non-point source pollution shall be investigated and proposed as appropriate. Attention shall be made to the water quality control and mitigation measures recommended in the ProPECC paper on construction site drainage.

(xii) Evaluation and quantification of residual impacts on the water system(s) and the sensitive receivers with regard to the appropriate water quality criteria, standards or guidelines.

3.3.4 Waste Management Implications

3.3.4.1 The Applicant shall follow the criteria and guidelines for evaluating and assessing waste management implications as stated in Annexes 7 and 15 of the TM, respectively.

3.3.4.2 The assessment of waste management implications shall cover the following :

(i) Analysis of Activities and Waste Generation

The Applicant shall identify the quantity, quality and timing of the waste arising as a result of the construction and operation activities, based on the sequence and duration of these activities.

(ii) Proposal for Waste Management

(a) Prior to considering the disposal options for various types of wastes, opportunities for reducing waste generation and on-site or off-site reuse shall be fully evaluated. Measures that can be taken in the planning and design stage eg. by modifying the design approach and in the construction stage for maximizing waste reduction shall be separately considered.

(b) Having taken into account all the opportunities for reducing waste generation and maximizing reuse, the types and quantities of the wastes required to be disposed of as a consequence shall be estimated and the disposal options for each type of waste described in detail. The disposal method recommended for each type of wastes shall take into account of the result of the assessment set out below.

(c) The impact caused by handling (including labeling, packaging and storage), collection, and disposal of wastes shall be addressed in detail and appropriate mitigation measures proposed. This assessment shall cover the following areas:

- potential hazard;

- air and odour emissions;

- noise;

- wastewater discharge; and

- public transport.

3.3.5 Landscape and Visual Impact

3.3.5.1 The Applicant shall follow the criteria and guidelines for evaluating and assessing landscape and visual impact as stated in Annexes 10 and 18 of the TM, respectively.

3.3.5.2 The assessment area for the landscape impact assessment shall include all areas within a 500m distance from the proposed project. The assessment area for the visual impact assessment shall be defined by the visual envelope of the proposed project.

3.3.5.3 The landscape and visual impact assessment shall include the following :

(i) a baseline study to provide for a comprehensive and accurate description of the baseline landscape and visual character;

(ii) a review of the relevant planning and development control framework;

(iii) impact studies to identify the potential landscape and visual impacts and predict their magnitude and potential significance; and

(iv) recommendations on mitigation measures and implementation programme.

3.3.5.4 The Applicant shall describe, appraise and analyze the existing landscape resource and character of the assessment area. The sensitivity of the landscape framework and its ability to accommodate change shall be particularly focused on. A system should be derived from judging impact significance. The Applicant shall identify the degree of compatibility of the proposed project with the existing landscape. The assessment shall quantify the potential landscape impacts as far as possible, so as to illustrate the significance of such impacts arising from the proposed project. Clear mapping of landscape impact is required.

3.3.5.5 The Applicant shall assess the visual impacts of the proposed project. The assessment shall include the following :

(i) identification and plotting of visual envelop of the proposed project within the assessment area;

(ii) identification of the key groups of sensitive receivers within the visibility contours with regard to views from both ground level and elevated vantage points;

(iii) the severity of visual impacts in terms of distance, number of sensitive receivers shall be identified. The visual impacts of the project with and without mitigation measures shall be assessed by illustrations of agreed numbers of photomontages and/or computer simulations at agreed vantage points; and

(iv) description of the visual compatibility of the project with the surrounding, and the planned setting and its interfere with the key views of the adjacent area.

3.3.5.6 The Applicant shall review relevant plans and studies which may contain guidelines and urban design concept, building height profile, designated view corridors, specific elements such as, areas of high visual value, special design areas, and open space network. The aim is to gain an insight to the future outlook of the area affected and the ways that the project can fit into the environment. Any conflict with the statutory town plan should be highlighted and appropriate follow-up action should be recommended.

3.3.5.7 The Applicant shall recommend mitigation measures to minimize the adverse effects identified above, including provision of a landscape design. The mitigation measures shall also include the preservation of vegetation, transplanting of mature trees, provision of screen planting, re-vegetation of disturbed land, reprovisioning of amenity areas, colour scheme and texture of material used, design of structures, provision of finishes to structures, and any measures to mitigate the disturbance of the existing land use. Parties shall be identified for the management and maintenance of any proposed mitigation measures to ensure their effectiveness throughout the operation phase of the proposed project. A practical programme and funding proposal for the implementation of the recommended measures shall also be worked out.

3.3.5.8 Perspective drawings, plans and section/elevation diagrams, annotated oblique aerial photographs, photographs on scaled physical models, photo-retouching and photomontage shall be adopted to illustrate the landscape and visual impacts of the proposed project. Photomontage shall be adopted to illustrate unmitigated impact, at day one operation with mitigation measures and residual impact at year 10 of the operation stage.

3.3.6 Landfill Gas Hazards

3.3.6.1 The landfill gas hazards assessment shall entail two main components which are qualitative risk assessment and landfill gas precautionary/ protection design. Specifically, the assessment shall include the following technical tasks:

(i) review of background information and studies related to the Tseung Kwan O Stage I landfill;

(ii) identification of the nature and extent of the sources, including the likely concentrations and/or amounts of hazardous emissions which might have the potential for impacts on the proposed project;

(iii) identification of the possible pathways through the ground, underground cavities, utilities or ground water, and the nature of these pathways through which the hazardous emissions must traverse if they were to reach the proposed project;

(iv) identification of the potential receivers associated with the proposed project which are sensitive to the impacts of the hazardous emissions;

(v) qualitative assessment on the degree of risk which the hazardous emissions may impose on the receivers for each of the source-pathway-receiver combinations; and

(vi) design of suitable level of precautionary measures for the proposed project, if needed.

4. ENVIRONMENTAL MONITORING & AUDIT (EM&A) REQUIREMENTS

4.1 The Applicant shall identify in the EIA study whether there is any need for EM&A activities during the construction and operation phases of the project and, if affirmative, shall define the scope of the EM&A requirements for the project in the EIA study. However, an operational noise monitoring programme should be proposed to verify the traffic noise predictions or the effectiveness of noise mitigation measures.

4.2 Subject to the confirmation of the EIA study findings, the Applicant shall comply with the requirements as stipulated in Annex 21 of the TM.

4.3 The Applicant shall prepare a project implementation schedule (in the form of a checklist) containing all the EIA study recommendations and mitigation measures with reference to the implementation programme.

5. SUMMARY of ENVIRONMENTAL OUTCOMES

The EIA report shall contain a summary of the key environmental outcomes arising from the EIA study, including the population and environmentally sensitive areas protected, environmentally friendly designs recommended, key environmental problems avoided, and environmental benefits of environmental protection measures recommended.

6. DURATION OF VALIDITY

This EIA study brief is valid for 24 months from the date of issue. If the EIA study does not commence within this period, the Applicant shall apply to the Director for a fresh EIA study brief before commencement of the EIA study.

7. REPORT REQUIREMENTS

7.1 In preparing the EIA report, the Applicant shall refer to Annex 11 of the TM for the contents of an EIA report. The Applicant shall also refer to Annex 20 of the TM, which stipulates the guidelines for the review of an EIA report.

7.2 The Applicant shall supply the Director with the following number of copies of the EIA report and the executive summary:

(i) 40 copies of the EIA report in English and 80 copies of the executive summary (each bilingual in both English and Chinese) as required under section 6(2) of the EIAO to be supplied at the time of application for approval of the EIA report.

(ii) when necessary, addendum to the EIA report and the executive summary submitted in (i) above as required under section 7(1) of the EIAO, to be supplied upon advice by the Director for public inspection.

(iii) 20 copies of the EIA report in English and 50 copies of the executive summary (each bilingual in both English and Chinese) with or without Addendum as required under section 7(5) of the EIAO, to be supplied upon advice by the Director for consultation with the Advisory Council on the Environment.

7.3 In addition, to facilitate the public inspection of the EIA Report via the EIAO Internet Website, the applicant shall provide electronic copies of both the EIA Report and the Executive Summary Report prepared in HyperText Markup Language (HTML) (version 4.0 or later) and in Portable Document Format (PDF version 4.0 or later), unless otherwise agreed by the Director. For the HTML version, a content page capable of providing hyperlink to each section and sub-section of the EIA Report and the Executive Summary Report shall be included in the beginning of the document. Hyperlinks to all figures, drawings and tables in the EIA Report and Executive Summary shall be provided in the main text from where the respective references are made. All graphics in the report shall be in interlaced GIF format unless otherwise agreed by the Director..

7.4 The electronic copies of the EIA report and the Executive Summary shall be submitted to the Director at the time of application for approval of the EIA Report.

7.5 When the EIA Report and the Executive Summary are made available for public inspection under s.7(1) of the EIA Ordinance, the content of the electronic copies of the EIA Report and the Executive Summary must be the same as the hard copies and the Director shall be provided with the most updated electronic copies.

8. OTHER PROCEDURAL REQUIREMENTS

8.1 During the EIA study, if there is any change in the name of the Applicant for this EIA study brief, the Applicant mentioned in this study brief must notify the Director immediately.

8.2 If there is any key change in the scope of the project mentioned in Section 1 of this EIA Study Brief and in Project Profile (No. PP-086/2000), the Applicant must seek confirmation from the Director in writing on whether or not the scope of issues covered by this EIA study brief can still cover the key changes, and the additional issues, if any, that the EIA study must also address. If the changes to the project fundamentally alter the key scope of the EIA study brief, the Applicant shall apply to the Director for a fresh EIA study brief.