TABLE OF CONTENTS

1. Introduction.. 1-1

1.1.... Background. 1-1

1.2.... Project Scope and Location. 1-2

1.3.... Construction Programme. 1-2

1.4.... Purpose of this Manual 1-2

1.5.... Project Organization. 1-3

1.6.... Structure of the EM&A Manual 1-5

2. Air Quality.. 2-1

2.1.... Introduction. 2-1

2.2.... Monitoring Parameters. 2-1

2.3.... Monitoring Equipment 2-1

2.4.... Monitoring Locations. 2-2

2.5.... Impact Monitoring. 2-4

2.6.... Event and Action Plan. 2-4

2.7.... Mitigation Measures. 2-7

2.8.... Audit Requirements. 2-7

3. Noise.. 3-1

3.1.... Introduction. 3-1

3.2.... General Monitoring Requirement and Equipment 3-1

3.3.... Monitoring Parameters for Construction Noise. 3-1

3.4.... Monitoring Locations for Construction Noise. 3-1

3.5.... Impact Monitoring for Construction Noise. 3-2

3.6.... Event and Action Plan for Construction Noise. 3-2

3.7.... Noise Parameters for Operation Road Traffic Noise. 3-4

3.8.... Monitoring Locations for Operation Road Traffic Noise. 3-4

3.9.... Impact Monitoring for Operation Road Traffic Noise. 3-4

3.10.. Event and Action Plan for Road Traffic Noise. 3-5

3.11.. Mitigation Measures. 3-5

3.12.. Audit Requirements. 3-6

4. Water Quality.. 4-1

4.1.... Introduction. 4-1

4.2.... Mitigation Measures. 4-1

4.3.... Construction Site Audits. 4-1

5. Waste Management.. 5-1

5.1.... Introduction. 5-1

5.2.... Mitigation Measures. 5-1

5.3.... Audit Requirement 5-1

6. Land Contamination.. 6-1

7. Landfill Gas Hazard.. 7-1

7.1.... Introduction. 7-1

7.2.... Monitoring and Mitigation Measures. 7-1

7.3.... Construction Phase. 7-1

7.4.... Operation Phase. 7-2

8. Cultural Heritage.. 8-3

8.1.... Introduction. 8-3

8.2.... Mitigation Measures. 8-3

9. Landscape & Visual.. 9-1

9.1.... Introduction. 9-1

9.2.... Mitigation Measures. 9-1

9.3.... Audit Requirements. 9-1

10. Site INSPECTION / Audit.. 10-2

10.1.. Site Inspection Requirements. 10-2

10.2.. Compliance with Legal and Contractual Requirements. 10-2

10.3.. Environmental Complaints. 10-3

11. Reporting.. 11-1

11.1.. Introduction. 11-1

11.2.. Electronic Reporting of EM&A Information. 11-1

11.3.. Baseline Monitoring Report 11-1

11.4.. Monthly EM&A Reports. 11-2

11.5.. Final EM&A Review Report for Construction Phase. 11-6

11.6.. Data Keeping. 11-7

11.7.. Interim Notifications of Environmental Quality Limit Exceedances. 11-7

List of Tables

Table 2‑1 Proposed Construction Dust Monitoring Stations. 2-3

Table 2‑2 Summary of Construction Dust Monitoring Programme. 2-4

Table 2‑3 Action and Limit Levels for Air Quality (Construction Dust) 2-5

Table 2‑4 Event and Action Plan for Air Quality (Construction Dust) 2-6

Table 3‑1 Proposed Noise Monitoring Stations during Construction Phase of the Project 3-2

Table 3‑2 Action and Limit Levels for Construction Noise. 3-3

Table 3‑3 Event and Action Plan for Construction Noise. 3-3

Table 3‑4 Road Traffic Noise Monitoring Locations. 3-4

Table 3‑5 List of Proposed Noise Mitigation Measures (Low-Noise Road Surfacing) 3-6

Table 3‑6 List of Proposed Noise Mitigation Measures (Barriers and Enclosures) 3-6

List of Figures

Figure 1.1	Location of the Project
Figure 1.2	Project Organization
Figure 2.1a	Locations of Representative Air Sensitive Receivers	Sheet 1 of 4
Figure 2.1b	Locations of Representative Air Sensitive Receivers	Sheet 2 of 4
Figure 2.1c	Locations of Representative Air Sensitive Receivers	Sheet 3 of 4
Figure 2.1d	Locations of Representative Air Sensitive Receivers	Sheet 4 of 4
Figure 2.2a	Locations of Construction Dust Monitoring Stations and the General Works Zone	Sheet 1 of 2
Figure 2.2b	Locations of Construction Dust Monitoring Stations and the General Works Zone	Sheet 2 of 2
Figure 2.3a	Locations of the Works Zone (Others)	Sheet 1 of 6
Figure 2.3b	Locations of the Works Zone (Others)	Sheet 2 of 6
Figure 2.3c	Locations of the Works Zone (Others)	Sheet 3 of 6
Figure 2.3d	Locations of the Works Zone (Others)	Sheet 4 of 6
Figure 2.3e	Locations of the Works Zone (Others)	Sheet 5 of 6
Figure 2.3f	Locations of the Works Zone (Others)	Sheet 6 of 6
Figure 2.4a	Locations of the Column Installations (Piling Work)	Sheet 1 of 6
Figure 2.4b	Locations of the Column Installations (Piling Work)	Sheet 2 of 6
Figure 2.4c	Locations of the Column Installations (Piling Work)	Sheet 3 of 6
Figure 2.4d	Locations of the Column Installations (Piling Work)	Sheet 4 of 6
Figure 2.4e	Locations of the Column Installations (Piling Work)	Sheet 5 of 6
Figure 2.4f	Locations of the Column Installations (Piling Work)	Sheet 6 of 6
Figure 3.1	Locations of Construction Noise Monitoring Stations
Figure 3.2	Locations of Road Traffic Noise Monitoring Stations
Figure 3.3a	Locations Representative Noise Sensitive Receivers	Sheet 1 of 2
Figure 3.3b	Locations Representative Noise Sensitive Receivers	Sheet 2 of 2
Figure 10.1	Complaint Response Procedure

List of Appendices

Appendix A Tentative Construction Programme

Appendix B Implementation Schedule of Recommended Mitigation Measures

Appendix C On-Site Checking of Monitoring Equipment

Appendix D Sample Data Record Sheet

Appendix E Sample of Interim Notification of Environmental Quality Limits Exceedances Record Sheet

1. Introduction

1.1 Background

1.1.1 The title of the Project is “Widening of Tsuen Wan Road and the associated junction improvement works” (hereafter referred to as the Project).

1.1.2 In 2006, Civil Engineering and Development Department (CEDD) engaged consultants to carry out an Environmental Impact Assessment (EIA) under an Investigation Assignment with the project title “Tsuen Wan Road Bypass, Widening of Tsuen Wan Road between Tsuen Tsing Interchange and Kwai Tsing Interchange, and Associated Junction Improvement Works”. The EIA studied the impacts of the project on noise, air quality, water quality, construction waste, cultural heritage, landfill gas hazard, hazard to life, ecology, visual and landscape on both existing and planned developments during construction and operation stages. The EIA report was approved under the EIA Ordinance in December 2008 (EIA Register No.: AEIAR-124/2008).

1.1.3 In 2009, CEDD commissioned a Design and Construction (D&C) Assignment on “Tsuen Wan Bypass, Widening of Tsuen Wan Road between Tsuen Tsing Interchange and Kwai Tsing Interchange, and Associated Junction Improvement Works” (the TWB project) to cater for the anticipated increase in traffic demand arising from the developments in the Northwest New Territories, the commissioning of West Rail and its associated property developments as well as other planned developments in Tsuen Wan. By comparing the results of the traffic survey conducted in 2012 with that conducted in 2006, it was revealed that there was a general decrease in the peak hour traffic volume between 2006 and 2012. Moreover, the projected traffic peak hour flow in 2021 as forecast in the survey conducted in 2012 also demonstrated a drop as compared with the traffic flow in 2006.

1.1.4 In view of the foregoing, CEDD concluded that there was still adequate road capacity for Tsuen Wan Road (TWR) by 2021 and there was no imminent need to implement the TWB project by that time. It was then agreed in June 2013 to defer the implementation programme of the TWB project.

1.1.5 Since then, Transport Department (TD) conducted traffic counts from 2013 and 2015. The traffic counts revealed a general increase in peak hour traffic in 2013 and 2014 when compared with the findings of CEDD’s traffic survey conducted in 2012, while the peak hour traffic in 2015 remained steady.

1.1.6 Highways Department (HyD) subsequently took over the project from CEDD. HyD’s traffic review study on TWR traffic conditions conducted in 2016 revealed that the widening of TWR and improvement of associated junctions were needed to cope with the future traffic demand.

1.1.7 On 23 May 2019, HyD commissioned AECOM Asia Co. Ltd. to undertake the assignment of Agreement No. CE 61/2018 (HY) Widening of Tsuen Wan Road, Extension of Existing Vehicular Bridge at Texaco Road and the Associated Junction Improvement Works – Investigation. The purpose of the investigation assignment is to examine and review the Initial Scheme, which was basically formulated under the aforementioned CEDD’s D&C Assignment, develop other feasible build forms / alignment options (other Schemes) for the Project. By comparing and evaluating the Initial Scheme and all other Schemes developed, based upon traffic, environmental and land considerations amongst other factors, the Preferred Scheme will be formulated and taken forward to the detailed design and construction stages of the Project.

1.1.8 Since approval of the abovementioned EIA report (EIA Register No.: AEIAR-124/2008) in 2008, there are new developments and new sensitive receivers within the study area as well as new assessment requirements for the Project, together with potential changes in project scope, a fresh EIA study is considered required for the Preferred Scheme.

1.1.9 The Project comprises the following which are classified as Designated Project (DP) elements under Part I, Schedule 2 of the EIAO^[1]:

· Item A.1 – A road which is an expressway, trunk road, primary distributor or district distributor road including new roads, and major extensions or improvements to existing roads; and

· Item A.8 – A road or railway bridge more than 100 m in length between abutments.

1.1.10 The Project will widen individual road sections of the existing TWR and construct slip road to relieve the existing traffic congestion and cope with the anticipated future traffic demand.

1.2 Project Scope and Location

1.2.1 The location of the Project is shown in Figure 1.1. The scope of the Project mainly comprises:

(i) Widening of a section of an elevated carriageway of TWR between Tai Ho Road and Wing Shun Street, from a three-lane carriageway to a four-lane carriageway on Kowloon bound;

(ii) Widening of a section of an elevated carriageway of TWR between Wing Shun Street and Wing Kei Road, from a dual two-lane carriageway to a dual three-lane carriageway;

(iii) Widening of a section of an at-grade carriageway of TWR between Wing Kei Road and KTI, from a dual three-lane carriageway to a dual five-lane carriageway;

(iv) Widening of a section of an elevated carriageway of TWR between KTI and Container Port Road, from a three-lane carriageway to a four-lane carriageway on Kowloon bound (its implementation is yet to be ascertained and subject to further traffic review);

(v) Construction of a slip road connecting TWR (Kowloon bound) to Tsing Tsuen Road (Slip Road C) (its implementation is yet to be ascertained and subject to further traffic review);

(vi) Construction of a slip road connecting TWR (Tuen Mun bound) and Hoi Hing Road (Slip Road E);

(vii) Provision of noise mitigation measures including noise barriers/enclosures and low noise surfacing materials on associated road sections of Tsuen Wan Road; and

(viii) Ancillary works including geotechnical, drainage, waterworks, lighting, landscaping works, installation of traffic aid facilities, etc.

1.3 Construction Programme

1.3.1 The construction works of the Project will tentatively commence in 2028. Under scenario without Slip Road C, the Project will tentatively complete in 2033. Under scenario with Slip Road C, the Project will tentatively complete in 2036. A tentative construction programme for the Project is provided in Appendix A.

1.4 Purpose of this Manual

1.4.1 The purpose of this Environmental Monitoring and Audit (EM&A) Manual is to guide the setups of an EM&A programme to ensure compliance with the EIA study recommendations, to assess the effectiveness of the recommended mitigation measures and to identify any further need for additional mitigation measures or remedial action. This Manual outlines the monitoring and audit programme for the construction and operation phases of the Project. It aims to provide systematic procedures for monitoring, auditing and minimizing environmental impacts associated with construction works and operational activities.

1.4.2 Hong Kong environmental regulations have served as environmental standards and guidelines in the preparation of this Manual. In addition, the EM&A Manual has been prepared in accordance with the requirements stipulated in Annex 21 of the EIAO-TM.

1.4.3 This Manual contains the following information:

· Responsibilities of the Contractor, the Engineer or Engineer’s Representative (ER), Environmental Team (ET) and Independent Environment Checker (IEC) with respect to the environmental monitoring and audit requirements during the course of the Project;

· Project organisation for the EM&A works;

· The basis for, and description of the broad approach underlying the EM&A programme;

· Details of the methodologies to be adopted, including all field laboratories and analytical procedures, and details on quality assurance and quality control programme;

· The rationale on which the environmental monitoring data will be evaluated and interpreted;

· Definition of Action and Limit levels;

· Establishment of Event and Action plans;

· Requirements for reviewing pollution sources and working procedures required in the event of non-compliance with the environmental criteria and complaints; and

· Requirements for presentation of environmental monitoring and audit data and appropriate reporting procedures.

1.4.4 For the purpose of this Manual, the ET leader, who shall be responsible for and in charge of the ET, shall refer to the person delegated the role of executing the EM&A requirements.

1.5 Project Organization

1.5.1 Involvement of relevant parties in a collaborative and interactive manner is essential for the implementation of the recommended EM&A programme. The following sections outline the primary responsibilities and duties of the key EM&A programme participants. The proposed project organization and lines of communication with respect to EM&A works are shown in Figure 1.2.

The Contractor

1.5.2 The Contractor shall report to the ER. The duties and responsibilities of the Contractor comprise the following:

· Work within the scope of the contract and other tender conditions with respect to environmental requirements;

· Operate and strictly adhere to the guidelines and requirements in this EM&A programme and contract specifications;

· Provide assistance to ET in carrying out monitoring and auditing;

· Participate in the site inspections undertaken by ET as required, and undertake correction actions;

· Provide information / advice to ET regarding works activities which may contribute, or be continuing to the generation of adverse environmental conditions;

· Submit proposals on mitigation measures in case of exceedance of Action and Limit levels in accordance with the Event / Action Plans;

· Implement measures to reduce impact where Action and Limit levels are exceeded; and

· Adhere to the procedures for carrying out complaint investigation.

Environmental Team (ET)

1.5.3 An ET shall be established before the commencement of construction of the Project. The ET shall be an independent party from the IEC and the Contractor. The ET shall be led and managed by the ET Leader. The ET Leader shall possess at least 7 years of experience in EM&A and/or environmental management. The ET Leader, or an ET Leader representative who shall be a member of the ET with at least 5 years of experience in EM&A or environmental management, shall work full time on-site.

1.5.4 The duties and responsibilities of the ET are:

· Monitor various environmental parameters as required in this EM&A Manual;

· Analyse the environmental monitoring and audit data and review the success of EM&A programme to cost-effectively confirm the adequacy of mitigation measures implemented and the validity of the EIA predictions and to identify any adverse environmental impacts arising;

· Carry out regular site inspection to investigate and audit the Contractors' site practice, equipment and work methodologies with respect to pollution control and environmental mitigation, and effect proactive action to pre-empt problems; carry out ad hoc site inspections if significant environmental problems are identified;

· Audit and prepare monitoring and audit reports on the environmental monitoring data and site environmental conditions;

· Report on the environmental monitoring and audit results to the Independent Environmental Checker, Contractor, the ER and EPD or its delegated representative;

· Recommend suitable mitigation measures to the Contractor in the case of exceedance of Action and Limit levels in accordance with the Event and Action Plans;

· Advice to the Contractor on environmental improvement, awareness, enhancement matters, etc. on site;

· Timely submission of the EM&A report to the Project Proponent and the EPD; and

· Adhere to the procedures for carrying out complaint investigation in accordance with Section 10.3 of this EM&A Manual.

Engineer or Engineer’s Representative (ER)

1.5.5 The ER is responsible for overseeing the construction works and for ensuring that the works undertaken by the Contractor in accordance with the specification and contractual requirements. The duties and responsibilities of the ER with respect to EM&A may include:

· Supervise the Contractor’s activities and ensure that the requirements in the EM&A Manual are fully complied with;

· Inform the Contractor when action is required to reduce impacts in accordance with the Event and Action Plans;

· Participate in joint site inspection undertaken by the ET; and

· Adhere to the procedures for carrying out complaint investigation.

Independent Environmental Checker (IEC)

1.5.6 An IEC shall be employed before commencement of construction of the Project. Appointment of IEC shall be approved by EPD. The IEC shall be an independent party from the Contractor and the ET and possess at least 7 years’ experience in EM&A and/or environmental management. The IEC shall report directly to the EPD on matters relating to the EM&A programme and environmental impacts from the Project. The IEC, or an IEC representative who shall be a person with at least 5 years of experience in EM&A or environmental management shall work full time on-site. The duties and responsibilities of the IEC are:

· Review the EM&A works performed by the ET (at least at monthly intervals);

· Carry out random sample check and audit the monitoring activities and results (at least at monthly intervals);

· Conduct random site inspection;

· Review the EM&A reports submitted by the ET;

· Review the effectiveness of environmental mitigation measures and project environmental performance;

· Review the proposal on mitigation measures submitted by the Contractor in accordance with the Event and Action Plans;

· Check the mitigation measures that have been recommended in the EIA and this Manual, and ensure they are properly implemented in a timely manner, when necessary; and

· Adhere to the procedures for carrying out complaint investigation.

1.5.7 Sufficient and suitably qualified professional and technical staff shall be employed by the respective parties to ensure full compliance with their duties and responsibilities, as required under the EM&A programme for the duration of the Project.

1.6 Structure of the EM&A Manual

1.6.1 Following this introductory section, the remainder of the Manual is set out as follows:

· Section 2 – Sets out EM&A requirement for air quality;

· Section 3 – Sets out EM&A requirement for noise;

· Section 4 – Sets out EM&A requirement for water quality;

· Section 5 – Sets out EM&A requirement for waste;

· Section 6 – Sets out EM&A requirement for land contamination;

· Section 7 – Sets out EM&A requirement for landfill gas hazard;

· Section 8 – Sets out EM&A requirement for cultural heritage;

· Section 9 – Sets out EM&A requirement for landscape and visual impact;

· Section 10 – Describes scope and frequency of environmental site audits and sets out the general requirements of the EM&A programme; and

· Section 11 – Details the EM&A reporting requirements.

2. Air Quality

2.1 Introduction

2.1.1 Potential air quality impacts arising from the construction and operation phases of the Project on air sensitive receivers (ASRs) were addressed in the EIA Report. The representative ASRs within the assessment area are presented in Figure 2.1a, Figure 2.1b, Figure 2.1c and Figure 2.1d. With implementation of the recommend control measures, no adverse air quality impact from the project during construction phase would be anticipated. Dust monitoring is proposed to be conducted during construction phase of the Project.

2.1.2 Regular site environmental audit is recommended to be conducted during the entire construction phase of the Project so as to ensure the implementation of the proposed dust mitigation measures and the dust suppression measures stipulated in Air Pollution Control (Construction Dust) Regulation as well as regulations mentioned in Sections 3.2.4 – 3.2.7 of EIA Report. Implementation schedule of mitigation measures are presented in Appendix B.

2.1.3 No adverse air quality impact would be anticipated during the operation phase of the Project. No operation phase air quality monitoring and audit is therefore considered necessary.

2.1.4 This section presents the requirements, methodology, equipment, monitoring locations, criteria and protocols for the monitoring and audit of air quality impact during the construction phase of the Project.

2.2 Monitoring Parameters

2.2.1 The major dusty construction activities of the Project would mainly be related to construction dust from site clearance, demolition of the existing structure, and minor excavation with limited backfilling for column installation and wind erosion of the limited exposed area which would generate dust emissions. Therefore, 1-hour and 24-hour average Respirable Suspended Particulates (RSP) and 24-hour average Fine Suspended Particulates (FSP) are recommended to be monitored continuously and audited at the proposed monitoring locations during construction phase.

2.2.2 Monitoring and audit of 1-hour and 24-hour average RSP and 24-hour average FSP levels shall be carried out by the ET to ensure that any deteriorating air quality could be readily detected, and timely action shall be undertaken to rectify such situation. All relevant data including temperature, relative humidity, pressure, weather conditions, and other special phenomena and work progress of the concerned site, etc., should be recorded down in detail.

2.3 Monitoring Equipment

2.3.1 The equipment used for continuous RSP and FSP monitoring shall be either FRM (Federal Reference Method)/ FEM (Federal Equivalent Method) or those being calibrated and verified on-site against FRM/FEM. The installation and operating procedures of the proposed instrument shall be followed by the operating manual supplied by the instrument manufacturer. At the later stage, the instrument model shall be proposed by ET and seek approval from IEC. The ET is responsible for the provision, installation, operation, maintenance and dismantling of the instrument. The ET shall strictly follow the operation manual to ensure normal operation of the instrument.

2.3.2 The proposed instrument is designated to allow remote monitoring of the system. The ET shall conduct the daily checks on the instrument and PM sampler to ensure normal operation. To ensure that the measurements are of acceptable quality, each sampler should be calibrated regularly. The following describes an on-site calibration protocol that would leave the deployed samplers in place.

Transfer Standard (TS)

2.3.3 A Transfer Standard (TS) is another PM monitor that is at least as capable as the sampler to be calibrated. Another sampler that has just been calibrated may serve the purpose provided its performance is known to be stable during the subsequent collocation period to be used as TS. Right before each on-site calibration, the TS itself needs to be calibrated e.g., collocating with an PM reference monitor such as the FRM or FEM PM monitoring at EPD’s Air Quality Monitoring Station (AQMS) or research institutes that has been calibrated against traceable standard. The TS/reference monitor collocation should last as least seven days.

On-site Calibration

2.3.4 The Transfer Standard (TS) should be placed near (<1m if practicable) the sampler to be calibrated so that both devices would be monitoring a similar environment. The TS is then turned on to warm-up for 30-60 minutes. The collocation period starts after the warm-up and TS is then left running with the sampler to be calibrated for at least three hours. The measurements from the sampler to be calibrated and the TS during the collection period will be statistically analyzed.

Quality Control Criteria

2.3.5 The response of the sampler should be adjusted if its performance during on-site calibration does not meet the following evaluation criteria. For each device, data below its detection limit will be excluded.

Tier 1: Correlation

· The minute average measurements from the two devices when subject to linear regression should have a coefficient of determination (R²)>0.7. The regression line slope should be between 0.75 to 1.25. If these criteria are not met due to narrow range of PM concentration (>30 µgm^-3 and >25 µgm^-3 as recommended span range for RSP and FSP, respectively) during the collocation period, Tier 2 will apply.

Tier 2: Root mean squared error

· The root mean squared error of the sampler minute average measurements should be <8 μg/m³ for RSP and <5 μg/m³ for FSP.

2.3.6 Each deployed sampler should be calibrated every month. If a sampler repeatedly failed in 2 or 3 consecutive calibrations, the sampler should be checked and maintained to improve its performance or it should be replaced.

2.3.7 Wind data monitoring equipment shall also be provided and set up at conspicuous locations for logging wind speed and wind direction close to/or at the dust monitoring locations. The equipment installation location shall be proposed by the ET and agreed with the ER and the IEC. For installation and operation of wind data monitoring equipment, the following points shall be observed.

· The wind sensors shall be installed on masts at an elevated level 10m above ground so that they are clear of obstructions or turbulence caused by the buildings;

· The wind data shall be captured by a data logger. The data recorded in the data logger shall be downloaded for analysis simultaneously;

· The wind data monitoring equipment shall be re-calibrated at least once every six months; and

· Wind direction should be divided into 16 sectors of 22.5 degrees each.

2.3.8 In exceptional situations, the ET may propose alternative methods to obtain representative wind data upon approval from the ER and agreement from the IEC.

2.4 Monitoring Locations

2.4.1 The selected monitoring locations are the worst potentially affected air sensitive receivers located in the vicinity of construction sites. The proposed air quality monitoring locations during construction phase are listed in below. Figure 2.2a, Figure 2.2b, Figure 2.3a, Figure 2.3b, Figure 2.3c, Figure 2.3d, Figure 2.3e, Figure 2.3f, Figure 2.4a, Figure 2.4b, Figure 2.4c, Figure 2.4d, Figure 2.4e and Figure 2.4f show the locations of air quality monitoring locations, the general works zones, and the works areas with dusty activities such as slopeworks, demolition of the existing structures, and column installation.

Table 2‑1 Proposed Construction Dust Monitoring Stations

Monitoring Station ID	EIA ID	Location	Approximate Horizontal Distance between ASRs and the Nearest Road Alignment (m)
AM1	A12	Metropolitan Factory and Warehouse Building	63
AM2	A28b	Salvation Army Ng Kok Wai Memorial Kindergarten	34
AM3	A33	Parc City Tower 3	37
AM4	A36	Ocean Pride Tower 10	39
AM5	A39	Ocean Pride Tower 7	22
AM6	A64	Tsuen Wan Industrial Centre	14
AM7	A97	City Point Block 1	18
AM8	A72	Lin Fung Centre	39
AM9 ^[1]	A102	Lung Shing Factory Building	121
AM10	A75b	Kerry (Tsuen Wan) Warehouse	24
AM11	A115	Citic Telecom Tower	8
AM12	A162	Shui Hing Tannery Factory Ltd	9
AM13^[1]	A141	Profit Industrial Building	11
AM14^[1]	A85	Riviera Garden Block 20 Hoi Kwai Mansion	30
AM15^[1]	A82	Riviera Garden Block 12 Hoi Kwai Mansion	25
AM16	A9	Basketball Court at Hoi On Road Playground	14
AM17	A54	Tsuen Wan Park	18
AM18	A89b	City Point Block 8	31
AM19	A154	Kwai Shun Street Playground	4
AM20	A133	Waford Industrial Building	65
AM21	A125	CNEC Lee I Yao Memorial Secondary School	76
AM22	A78	Wing Kei Road 5-A-Side Soccer Pitch	24
Notes: [1] The proposed monitoring station will be considered if the proposed Slip Road C (connecting Tsing Tsuen Road and Tsuen Wan Road) is implemented subject to further traffic review to be conducted upon completion of the “Improvement Works at Tsuen Tsing Interchange” tentatively in 2026.

2.4.2 The status and locations of the air sensitive receivers may change after issuing this Manual. In such case, the ET shall propose updated monitoring locations and seek approval from ER and IEC and agreement from EPD on the proposal.

2.4.3 When alternative monitoring locations are proposed, the following criteria, as far as practicable, shall be followed:

i. at the site boundary or such locations close to the major dust emission source;

ii. close to the air sensitive receivers as defined in the EIAO-TM;

iii. proper position/sitting and orientation of the monitoring equipment; and

iv. take into account the prevailing meteorological conditions.

2.4.4 The ET shall agree with the IEC on the position of the instrument. When positioning the instrument, the following points shall be noted:

i. a horizontal platform with appropriate support to secure the instrument against gusty wind shall be provided;

ii. general housekeeping, cleaning works and other preventative maintenance activities such as checking the operating status of individual monitoring equipment should be carried out to ensure the proper operation of the system;

iii. to ensure representative sampling, the inlet of the instrument should not be obstructed by nearby objects;

iv. any wire fence and gate, to protect the instrument, shall not cause any obstruction during monitoring;

v. no furnace or incinerator flue is nearby;

vi. airflow around the instrument is unrestricted;

vii. permission must be obtained to set up the instrument and to obtain access to the monitoring stations; and

viii. a secured supply of electricity is needed to operate the samplers.

2.5 Impact Monitoring

2.5.1 The ET shall carry out impact monitoring during construction phase of the Project. For 1-hour and 24-hour average RSP, and 24-hour average FSP monitoring, continuous monitoring of hourly data should be undertaken. In case of non-compliance with the air criteria, a series of actions, specified in the Action Plan in the following section, should be conducted. The impact monitoring programme is summarized in Table 2‑2.

2.5.2 The monthly schedule of the compliance and impact monitoring programme should be drawn up by the ET one month prior to the commencement of the scheduled construction period. Before commencing the impact monitoring, the ET shall inform the IEC of the impact monitoring programme such that the IEC can conduct on-site audit to ensure accuracy of the impact monitoring results.

Table 2‑2 Summary of Construction Dust Monitoring Programme

Monitoring Period	Duration	Sampling Parameter
Impact Monitoring	Throughout the construction phase	1-hour and 24-hour RSP, and 24-hour FSP

2.6 Event and Action Plan

2.6.1 The ET shall compare the impact monitoring results with air quality criteria set up for 1-hour and 24-hour average RSP, and 24-hour average FSP. Table 2‑3 shows the air quality criteria, namely Action and Limit levels to be used. However, it should be noted that Action and Limit Levels may subject to change based on the prevailing Air Quality Objectives (AQOs) implemented at the time of monitoring. Should non-compliance of the air quality criteria occur, action in accordance with the Action Plan in Table 2‑4 shall be carried out.

Table 2‑3 Action and Limit Levels for Air Quality (Construction Dust)

Parameter	Action Level	Limit Level
RSP (1 hour average)	150 µgm^-3	-
24-hour RSP level (rolling average)	-	100 µgm^-3
24-hour FSP level (rolling average)	-	50 µgm^-3

Table 2‑4 Event and Action Plan for Air Quality (Construction Dust)

Event	Action
	ET	IEC	ER	Contractor
Action level exceedance for one sample	1. Notify IEC and ER; 2. Check the monitoring data and error messages to confirm if the performance of the monitoring equipment is normal; 3. If exceedance is confirmed, identify source(s), investigate the causes of exceedance and propose remedial measures; 4. Assess effectiveness of Contractor’s remedial measures and keep IEC and ER informed of the results until exceedance stops.	1. Check monitoring data submitted by ET; 2. Check Contractor’s working method; 3. Discuss with ET, ER and Contractor on possible remedial measures; 4. Advise ER and ET on the effectiveness of the proposed remedial measures; 5. Supervise implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing; 2. Notify Contractor; 3. In consultation with IEC and ET, agree with the Contractor on the remedial measures to be implemented; 4. Ensure remedial measures are properly implemented.	1. Identify sources of exceedance and discuss with ER, ET and IEC on possible remedial measures; 2. Implement remedial measures; 3. Amend working methods if appropriate.
Action level exceedance for two or more consecutive sampling	1. Notify IEC and ER; 2. Check the monitoring data and the performance of the monitoring equipment (refer to Appendix C); 3. If exceedance is confirmed, identify source(s), investigate the causes of exceedance and propose remedial measures; 4. Discuss with IEC and Contractor on possible remedial measures required; 5. Assess effectiveness of Contractor’s remedial measures and keep IEC and ER informed of the results until exceedance stops. 6. Notify EPD if the exceedance is confirmed to be related to the Project.	1. Check monitoring data submitted by ET; 2. Check Contractor’s working method and verify the performance of the monitoring equipment to be checked by ET (refer to Appendix C); 3. Discuss with ET and Contractor on possible remedial measures; 4. Advise ER and ET on the effectiveness of the proposed remedial measures; 5. Supervise implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing; 2. Notify Contractor; 3. In consultation with IEC and ET, agree with the Contractor on the proposal for remedial measures to be implemented; 4. Ensure the proposal for remedial measures are properly implemented.	1. Identify the sources and discuss with ER, ET and IEC on possible remedial measures; 2. Submit a proposal for remedial measures to ER, IEC and ET within 2 working days of notification of exceedance for agreement; 3. Implement the agreed proposal; 4. Amend proposal if appropriate.
Limit level exceedance for one 24-hr rolling average RSP concentration record or/and one 24-hr rolling average FSP concentration record	1. Notify IEC, ER, Contractor and EPD; 2. Check the monitoring data and the performance of the monitoring equipment (refer to Appendix C); 3. If exceedance is confirmed, identify source(s), investigate the causes of exceedance and propose remedial measures; 4. Discuss with IEC, ER and Contractor on possible remedial measures required; 5. Assess effectiveness of Contractor’s remedial measures and keep IEC and ER informed of the results until exceedance stops. 6. Notify EPD if the exceedance is confirmed to be related to the Project.	1. Check monitoring data submitted by ET; 2. Check Contractor’s working method; and verify the performance of the monitoring equipment to be checked by ET (refer to Appendix C); 3. Discuss with ER, ET and Contractor on the possible remedial measures; 4. Advise ER and ET on the effectiveness of the proposed remedial measures; 5. Review Contractor’s remedial measures whenever necessary to assure their effectiveness and advise ER and ET accordingly; 6. Supervise the implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing; 2. Notify Contractor; 3. In consultation with the IEC and ET, agree with the Contractor on the proposal for remedial measures to be implemented; 4. Ensure the proposal for remedial measures are properly implemented; 5. If exceedance continues, identify what portion of the work is responsible and instruct the Contractor to stop that portion of work until the exceedance is abated.	1. Identify the sources and discuss with ER, ET and IEC on possible remedial measures; 2. Take immediate action to avoid further exceedance; 3. Submit a proposal for remedial measures to ER, IEC and ET within 2 working days of notification of exceedance for agreement; 4. Implement the agreed proposal; 5. Review and resubmit proposals if the problem is still not under control; 6. Stop the relevant portion of works as determined by ER until the exceedance is abated.

2.7 Mitigation Measures

2.7.1 Mitigation measures for construction phase air quality impact have been recommended in the EIA Report. All the recommended mitigation measures are detailed in the implementation schedule presented in Appendix B. The Contractor shall be responsible for the design and implementation of these measures.

2.8 Audit Requirements

2.8.1 Regular site inspection and audit at least once per week should be conducted during the entire construction phase of the Project to ensure the recommended mitigation measures are properly implemented.

3. Noise

3.1 Introduction

3.1.1 The EIA has predicted the potential construction noise and operation traffic noise impacts associated with the Project. The representative Noise Sensitive Receivers (NSRs) within the assessment area are presented in Figure 3.3a and Figure 3.3b.

3.1.2 Construction noise mitigation measures would be required to reduce noise levels to the stipulated standard. A noise monitoring and audit programme should be undertaken to confirm such mitigation measures would be implemented properly.

3.1.3 For traffic noise impact, mitigation measures including provision of low noise road surfacing, noise barriers and enclosures would need to be implemented along the roadworks within the Project area. Road traffic noise levels should be monitored at representative NSRs, which are in the vicinity of the recommended direct mitigation measures, during the first year after road opening. The purpose of the monitoring is to ascertain that the recommended mitigation measures are effective in reducing the noise levels.

3.1.4 In this section, the requirements, methodology, equipment, monitoring locations, criteria and protocols for the monitoring and audit of noise impacts during construction phase and operation phase of the Project are presented.

3.2 General Monitoring Requirement and Equipment

3.2.1 As referred to in the Technical Memorandum (TM) issued under the Noise Control Ordinance (NCO), sound level meters in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications shall be used for carrying out the noise monitoring. Immediately prior to and following each noise measurement, the accuracy of the sound level meter shall be checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements shall be accepted as valid only if the calibration level from before and after the noise measurement agree to within 1.0 dB.

3.2.2 Noise measurements shall not be made in fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

3.2.3 The ET is responsible for the provision of the monitoring equipment. He shall ensure that sufficient noise measuring equipment and associated instrumentation are available for carrying out the baseline monitoring, regular impact monitoring and ad hoc monitoring. All the equipment and associated instrumentation shall be clearly labelled. The equipment installation location shall be proposed by the ET Leader and agreed with the IEC and EPD.

3.2.4 The noise monitoring station shall normally be at a point 1 m from the exterior of the sensitive receivers building façade and be a position 1.2 m above the ground. If there is a problem with access to the normal monitoring position, an alternative position shall be chosen, and a correction to the measurements shall be made. For reference, a correction of +3 dB(A) shall be made to the free field measurements. The ET shall agree with the IEC on the monitoring position and the corrections adopted. Once the positions for the monitoring stations are chosen, the baseline monitoring and the impact monitoring shall be carried out at the same positions.

3.3 Monitoring Parameters for Construction Noise

3.3.1 The construction noise levels should be measured in terms of the 30-minute A-weighted equivalent continuous sound pressure level (Leq (30-min)). Leq (30-min) should be used as the monitoring parameter for the time period between 0700 and 1900 hours on normal weekdays.

3.3.2 Supplementary information for data auditing and statistical results such as L10 and L90 should also be obtained for reference. Sample noise field data sheets are shown in Appendix D of this Manual for reference. The ET Leader may modify the data record sheet for this EM&A programme but the format of which should be agreed by the IEC.

3.4 Monitoring Locations for Construction Noise

3.4.1 Based on the noise assessment results in the EIA Report, noise exceedances are predicted under the unmitigated scenario, whereas no noise exceedance would be predicted under the mitigated scenario. Figure 3.1 shows the proposed construction phase noise monitoring stations. Details of the proposed noise monitoring stations are summarized in Table 3‑1.

Table 3‑1 Proposed Noise Monitoring Stations during Construction Phase of the Project

Noise Monitoring Point	EIA ID	Location	Monitoring Period
CM1	SAK2	Salvation Army Ng Kok Wai Memorial Kindergarten	Works at Works Area 1 and 2 during non-restricted hours
CM2	OP10	Ocean Pride Tower 7	Works at Works Area 1 during non-restricted hours
CM3	CP1	City Point Block 1	Works at Works Area 2 during non-restricted hours
CM4^(1)	RG12	Hoi Kwai Mansion, Riviera Gardens	Works at Works Area 6 during non-restricted hours

Notes:

(1) Only applies to “with Slip Road C” Option.

3.4.2 The status and locations of NSRs may change after issuing this Manual. If such cases exist, the ET shall propose updated monitoring locations and seek approval from the IEC and agreement from EPD of the proposal.

3.4.3 When alternative monitoring locations are proposed, the monitoring locations shall be chosen based on the following criteria:

i. at locations close to the major site activities which are likely to have noise impacts;

ii. close to the NSRs; and

iii. for monitoring locations located in the vicinity of the sensitive receivers, care shall be taken to cause minimal disturbance to the occupants during monitoring.

3.5 Impact Monitoring for Construction Noise

3.5.1 Construction noise monitoring should be carried out at the designated monitoring station when there are Project-related construction activities being undertaken within a radius of 300 m from the monitoring stations. The monitoring frequency should depend on the scale of the construction activities. An initial guide on the monitoring is to obtain one set of 30-minute measurement at each station between 0700 and 1900 hours on normal weekdays at a frequency of once a week when construction activities are underway.

3.5.2 If construction works are extended to include works during the hours of 1900 - 0700, and/or percussive piling is be carried out, applicable permits under NCO shall be obtained by the Contractor. The monitoring requirements and conditions stipulated in the permits have to be followed.

3.5.3 In case of non-compliance with the construction noise criteria, more frequent monitoring, as specified in the Action Plan in Table 3‑3 shall be carried out. This additional monitoring shall be continued until the recorded noise levels are rectified or proved to be irrelevant to the construction activities.

3.6 Event and Action Plan for Construction Noise

3.6.1 The Action and Limit levels for construction noise are defined in Table 3‑2. Should non-compliance of the criteria occur, action in accordance with the Action Plan in Table 3‑3 shall be carried out.

Table 3‑2 Action and Limit Levels for Construction Noise

Time Period	Action Level	Limit Level
0700 – 1900 hours on normal weekdays	When one documented complaint is received	75 dB(A)*

Notes:

· If works are to be carried out during restricted hours and/or percussive piling is be carried out, the monitoring requirements and the conditions stipulated in the Construction Noise Permit (CNP) issued by the Noise Control Authority have to be followed.

· * 70 dB(A) and 65 dB(A) for schools during normal teaching periods and school examination periods, respectively.

Table 3‑3 Event and Action Plan for Construction Noise

Event	Action
	ET	IEC	ER	Contractor
Action Level	1. Notify IEC and Contractor; 2. Carry out investigation; 3. Report the results of investigation to the IEC, ER and Contractor; 4. Discuss with the Contractor and formulate remedial measures; and 5. Increase monitoring frequency to check mitigation effectiveness.	1. Review the analyzed results submitted by the ET; 2. Review the proposed remedial measures by the Contractor and advise the ER accordingly; and 3. Supervise the implementation of remedial measures.	1. Confirm receipt of notification of failure in writing; 2. Notify Contractor; 3. Require Contractor to propose remedial measures for the analyzed noise problem; and 4. Ensure remedial measures are properly implemented.	1. Submit noise mitigation proposals to IEC; and 2. Implement noise mitigation proposals.
Limit Level	1. Identify source; 2. Inform IEC, ER, EPD and Contractor; 3. Repeat measurements to confirm findings; 4. Increase monitoring frequency; 5. Carry out analysis of Contractor’s working procedures to determine possible mitigation to be implemented; 6. Inform IEC, ER and EPD the causes and actions taken for the exceedances; 7. Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results; and 8. If exceedance stops, cease additional monitoring.	1. Discuss amongst ER, ET, and Contractor on the potential remedial actions; 2. Review Contractors remedial actions whenever necessary to assure their effectiveness and advise the ER accordingly; and 3. Supervise the implementation of remedial measures.	1. Confirm receipt of notification of failure in writing; 2. Notify Contractor; 3. Require Contractor to propose remedial measures for the analyzed noise problem; 4. Ensure remedial measures properly implemented; and 5. If exceedance continues, consider what portion of the work is responsible and instruct the Contractor to stop that portion of work until the exceedance is abated.	1. Take immediate action to avoid further exceedance; 2. Submit proposals for remedial actions to IEC within 3 working days of notification; 3. Implement the agreed proposals; 4. Resubmit proposals if problem still not under control; and 5. Stop the relevant portion of works as determined by the ER until the exceedance is abated.

3.7 Noise Parameters for Operation Road Traffic Noise

3.7.1 The ET should carry out monitoring of road traffic noise after the works under Contract are completed and upon commencement of operation of the Project. The noise monitoring should be carried out during the first year of the operation phase. The road traffic noise during operation of the Project should be measured in terms of the A-weighted equivalent of L_{10 (1-hr)}. During the traffic noise measurement, traffic count including traffic volume, percentage of heavy vehicles as defined in Calculation of Road Traffic Noise (CRTN) and traffic speed should also be undertaken concurrently. Supplementary information for data auditing and statistical results such as L_eq and L₉₀ should also be obtained for reference.

3.7.2 Noise measurements shall not be made in fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

3.8 Monitoring Locations for Operation Road Traffic Noise

3.8.1 The representative NSRs identified in the EIA Report are selected as the noise monitoring locations in this EM&A Manual. The traffic noise monitoring locations during operation phase are listed in Table 3‑4 and shown in Figure 3.2. The locations for operation noise monitoring shall be defined during detailed design on the basis of the status of the most up-to-date information on proposed developments surrounding the Project.

Table 3‑4 Road Traffic Noise Monitoring Locations

Monitoring Station ID	NSR ID no. in EIA Report	Location	Proposed Mitigation Measures Nearby
OM1	OP11	Ocean Pride Tower 10	FE1
OM2	TD6	The Dynasty Tower 1	FE1, FE2, SE1
OM3	CP12	City Point Block 8	SE1, N1
OM4^(1)	RG5	Hoi Yin Mansion, Riviera Gardens	SE2, SE3, SE4, N2, LNRS1

Notes:

(1) Only applies to “with Slip Road C” Option.

3.8.2 The status and locations of NSRs may change after issuing this manual. In this event, the ET Leader shall propose updated monitoring locations and seek approval from IEC and agreement from EPD of the proposal.

3.8.3 When alternative monitoring locations are proposed, the monitoring locations should be chosen based on the following criteria in that they should be:

· At locations close to the major site activities which are likely to have noise impacts;

· Close to the NSRs; and

· For monitoring locations located in the vicinity of the sensitive receivers, care should be taken to cause minimal disturbance to the occupants during monitoring.

3.9 Impact Monitoring for Operation Road Traffic Noise

3.9.1 Traffic noise monitoring shall be carried out at all the designated traffic noise monitoring stations. The following is an initial guide on the traffic noise monitoring requirements during the operation phase:

· One set of measurements at the morning traffic peak hour on normal weekdays;

· One set of measurements at the evening traffic peak hour on normal weekdays;

· A concurrent census of traffic flow and percentage heavy vehicle shall be conducted for the Project roads and the existing road network in the vicinity of each measuring point;

· Average vehicle speed estimated for Project road and the existing road network in the vicinity of each measuring points; and

· The two sets of monitoring data should be obtained within the first year of operation.

3.9.2 The ET should prepare and deposit to EPD, at least 6 months before the operation of the proposed roads under the Project, a monitoring plan for the purpose of assessing the accuracy of traffic noise predictions by comparing the noise impact predictions with the actual impacts. The monitoring plan should contain monitoring locations, monitoring schedules, methodology of noise monitoring including noise measurement procedures, traffic counts and speed checks, and methodology of comparison with the predicted levels. The ET should implement the monitoring plan in accordance with the deposited monitoring plan unless with prior justifications. Monitoring details and results including the comparison between the measured noise levels and the predicted levels should be recorded in a report to be deposited with EPD within one month of the completion of the monitoring. The report should be certified by the ET Leader and verified by the IEC before deposit with EPD.

3.9.3 Measured noise levels should be compared with predicted noise levels by applying appropriate conversion corrections to allow for the traffic conditions at the time of measurement.

3.9.4 Each set of measurements shall include three measurements of 30 minutes. The parameters L₁₀, L_eq, L₉₀ and L_max will be recorded for data auditing and reference.

3.10 Event and Action Plan for Road Traffic Noise

3.10.1 For traffic noise, the measured /monitored noise levels shall be compared with the predicted results and the predicted traffic flow conditions (calculated noise levels based on concurrent traffic census obtained). In case discrepancies are observed, explanation shall be given to justify the discrepancies and / or propose any recommendation if identified necessary.

3.11 Mitigation Measures

Construction Phase

3.11.1 To alleviate the construction noise impact on the affected NSRs, use of movable noise barriers for excavator, mobile crane, loader, lorry, saw circular wood, bar bender and cutter (electric), breaker hand-held mass<=10kg, concrete lorry mixer, concrete mixer, poker vibratory hand-held, drilling rig, crane is recommended during construction phase.

3.11.2 The Contractor shall liaise with the school representative(s) to obtain the examination schedule so as to avoid noisy construction activities during school examination period. Scheduling of construction works outside school examination period to less intrusive periods or restricting critical works area would reduce the overall construction noise impacts at the NSRs and ensuring compliance with the construction noise criterion.

3.11.3 In addition to the above construction noise mitigation measures, good site practices listed below and the noise control requirements stated in EPD’s “Recommended Pollution Control Clauses for Construction Contracts” should be included in the Contract Specification for the Contractors to follow and implemented to further minimize the potential noise impacts during the construction phase of the Project:

· Quiet PME, such as those listed in EPD’s Quality Powered Mechanical Equipment, should be considered for construction works to further minimize the potential construction noise impact.

· Only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction period.

· Silencers or mufflers on construction equipment should be utilised and should be properly maintained during the construction program.

· Mobile plant, if any, should be sited as far away from NSRs as possible.

· Machines and plant (such as trucks) that may be in intermittent use should be shut down between works periods or should be throttled down to a minimum.

· Plant known to emit noise strongly in one direction should, wherever possible, be orientated so that the noise is directed away from the nearby NSRs.

· Material stockpiles and other structures should be effectively utilised, wherever practicable, in screening noise from on-site construction activities.

3.11.4 The implementation schedule of the good site practices is presented in Appendix B.

Operation Phase

Road Traffic Noise

3.11.5 Direct noise mitigation measures including low noise road surfacing and noise barriers have been proposed to alleviate the traffic noise impact. Table 3‑5 and Table 3‑6 summarise the proposed noise mitigation measures.

Table 3‑5 List of Proposed Noise Mitigation Measures (Low-Noise Road Surfacing)

ID