Figure 1.1	Project Location Plan
Figure 1.2	Locations of Designated Projects
Figure 1.3	Recommended Outline Development Plan
Figure 2.1	Locations of Construction Dust Monitoring Stations (Key Plan)
Figure 2.1.1	Locations of Construction Dust Monitoring Stations (Sheet 1 of 4)
Figure 2.1.2	Locations of Construction Dust Monitoring Stations (Sheet 2 of 4)
Figure 2.1.3	Locations of Construction Dust Monitoring Stations (Sheet 3 of 4)
Figure 2.1.4	Locations of Construction Dust Monitoring Stations (Sheet 4 of 4)
Figure 3.1	Locations of Road Traffic Noise Monitoring Stations (Key Plan)
Figure 3.1.1	Locations of Road Traffic Noise Monitoring Stations (Sheet 1 of 2)
Figure 3.1.2	Locations of Road Traffic Noise Monitoring Stations (Sheet 2 of 2)
Figure 4.1	Locations of Water Quality Monitoring Stations
Figure 13.1	Location Plan of Ngau Tam Mei Landfill and Project Site Boundary

LIST OF Appendices

Appendix A	Project Organisation
Appendix B1	Preliminary Construction Phasing and Population Intake Schedule
Appendix B2	Tentative Construction Programme
Appendix C	Project Implementation Schedule
Appendix D	On-Site Checking of Monitoring Equipment
Appendix E	Sample Record Sheets
Appendix F	Complaint Handling Procedure
Appendix G	Sample of the Interim Notification

1 IntROduction

1.1 Project Background

1.1.1 The Civil Engineering and Development Department (CEDD) and the Planning Department (PlanD) jointly commissioned the Ngau Tam Mei (NTM) Land Use Review Study (the Study) in November 2021 to capitalise on the development opportunities to be brought about by the NTM Station on the proposed Northern Link (hereinafter refer to as NOL Main Line). The Study aims to examine the comprehensive development of the brownfield clusters in NTM, which was subsequently extended to cover a nearby site as identified under the “Green Belt” Review announced in the 2022 Policy Address for holistic planning (hereinafter referred to as “the Project”); to ascertain the feasibility and acceptability of the Project with technical assessments including the statutory Environmental Impact Assessment (EIA); to formulate a Recommended Outline Development Plan (RODP); and to conduct public engagement (PE) for increasing awareness and engagement among stakeholders.

1.1.2 The Northern Metropolis Action Agenda (NMAA) promulgated in October 2023 outlines the development positioning of four major zones in the Northern Metropolis (NM). Amongst them, the Innovation and Technology (I&T) Zone covers San Tin Technopole (STT) and NTM. STT will be a hub for clustered I&T development, creating synergy with the Shenzhen I&T Zone. Upon completion of the proposed NOL Main Line in 2034, NTM will only be one station away from STT. It is stated in NMAA that land will be reserved in NTM for use of post-secondary education institutions, with a focus on scientific research to complement the I&T development in STT, promoting “research, academic and industry” collaboration.

1.1.3 The 2024 Policy Address announced to reserve land in the NM for the “Northern Metropolis University Town (NMUT)”, and encourage local post-seoncdary education institutions to introduce more branded programmes, research collaboration and exchange projects with renowned Mainland and overseas institutions in a flexible and innovative manner. It is also stated in the 2024 Policy Address that, land will be reserved in NTM for developing the third medical school and an integrated medical teaching and research hospital (hereinafter referred to as “Integrated Hospital”). As announced in the 2025 Policy Address, a Working Group on Planning and Construction of the University Town (WG) will be set up under the Committee on Development of the NM, to study the development mode for the NMUT and make recommendations on the positioning and vision regarding the development of NMUT sites to devise a clear, industry-led approach. The land in NTM can dovetail with the overall I&T development of the STT and the Hong Kong-Shenzhen Innovation and Technology Park (HSITP) at the Loop, among others, life and health technology industries, and to be used for joint development with the third medical school and an integrated medical teaching and research hospital. The design and implementation of the UniTown will be duly considered by the Education Bureau under the steer of the WG.

1.1.4 A 2-month PE was conducted between 14 November 2024 and 13 January 2025 to solicit public views on a Broad Land Use Concept Plan developed under the Study. Taking into account the public views collected in the PE, policy directives, planning and engineering considerations, technical assessments as well as departmental advice, a RODP for the NTM New Development Area (NDA) has been formulated (Figure 1.3 refers).

1.1.5 Locations of the Project Site (including the proposed works sites/areas) and the Development Area are shown in Figure 1.1. Located to the south of STT and to the northeast of Yuen Long New Town, the total area of Development Area covers about 130 ha and is currently occupied by Yau Tam Mei Tsuen, scattered brownfield operations, farmland/fishponds, chicken farm, permitted burial grounds, etc. The Project comprises mainly educational institutions, hospital, other government, institution and community (GIC) facilities, housing, as well as the associated infrastructure works (e.g. road networks, sewage pumping station (SPS), etc.).

1.1.6 The NTM Station, the depot and the associated railway facilities under the NOL Main Line within the Project Site will be implemented by another project proponent (i.e. MTR Corporation Limited (MTRCL)), thus the construction and operation of these railway facilities are not part of this Project. The associated environmental impacts arising from the construction and operation of the NOL Main Line were assessed in its approved EIA report (Register No.: AEIAR-259/2024).

1.2 The Project

1.2.1 The proposed scope of the Project includes the following principal works elements to support the development of NTM NDA as shown in Figure 1.1.

Site Formation and Engineering Infrastructure Works

(a) Site formation works including slope cutting and filling and retaining wall installation;

(b) Engineering infrastructure works comprising roads including district distributor roads, local roads, drainage works including revitalisation works for Ngau Tam Mei Drainage Channel (NTMDC), sewerage provision including a SPS and other utilities works to support the proposed development of the Project;

(d) Provision of environmental mitigation measures for the works mentioned above.

Other Works

(a) Developments including GIC facilities, residential development, schools, electrical substations and other facilities to support the proposed development of the Project.

1.3 Designated Project under Environmental Impact Assessment Ordinance (EIAO)

1.3.1 The Development Area, covering an area of about 130 ha, constitutes a Designated Project (DP) by virtue of Item 1 under Schedule 3 of the EIAO:

· Item 1 – An urban development or redevelopment project covering an area of more than 50 ha.

1.3.2 In addition, the Project also constitutes DPs under Part I, Schedule 2 of the EIAO, which are listed in Table 1.1 and illustrated in Figure 1.2.

Table 1.1 Schedule 2 Designated Projects Under the Project

Ref. No.	Schedule 2 Designated Project		Work Component / Reference in RODP
DP1	Item A.1	A carriageway for motor vehicles that is an expressway, trunk road, primary distributor road or district distributor road	Construction and operation of district distributor road (Road D1) and associated road works at San Tin Highway
DP2	Item I.1(b)	A drainage channel or river training and diversion works located less than 300 m from the nearest boundary of an existing or planned conservation area	Part of Revitalisation of Ngau Tam Mei Drainage Channel and river diversion works located less than 300 m from the nearest boundary of an existing conservation area

DP1 – Construction and Operation of District Distributor Road (Road D1) and associated road works at San Tin Highway

1.3.3 The Project will be served by a network of District Distributor (DD) and Local Distributors (LD). Road D1, which is a DD (i.e. Item A.1 of Schedule 2 of the EIAO), is proposed to be a dual two-lane carriageway serving as the main connection road between San Tin Highway and the NTM NDA. Most of the Road D1 will be constructed at-grade, except for an elevated section of approximately 300 m long near Site E.1 and Site R.1, which connects to the proposed elevated junction over the existing San Tin Highway. A connection with the planned NM Highway – San Tin Section is reserved at the east end of Road D1.

DP2 – Part of Revitalisation of Ngau Tam Mei Drainage Channel and river diversion works located less than 300 m from the nearest boundary of an existing conservation area

1.3.4 The current NTMDC that sits within the Project Site is mainly a concrete channelised waterway. As part of the blue-green spine concept, the existing concrete channel will be revitalised with a green and ecologically friendly approach for integration with the overall land use planning. Provision of natural substrates that could encourage colonisation of flora and freshwater fauna in the bottom and banks of the revitalised watercourses would be considered, subject to detailed design of the proposed revitalisation measures. The drainage channel would also be widened to increase the hydraulic capacity of the river, creating a resilient and dynamic design. These provisions, including planting of suitable trees, would enable connectivity and usage for mammals and avifauna. Also, landscape and recreation provisions as well as pedestrian walkway and cycling track will be provided along the revitalised NTMDC.

1.3.5 Due to the proposed developments, a few watercourses (except NTMDC) within the Project Site will be permanently diverted or removed. Diversion works at these existing watercourses would involve diversion of water flow from their existing routes to the new routes through the proposed covered drainage system of the new development.

1.3.6 Part of the NTMDC and a few watercourses in the southeastern part of the NTM NDA are located within 300 m from Conservation Area (CA). Revitalisation and river diversion works within 300 m from CA fall into the category of Item I.1(b), Part I, Schedule 2 of the EIAO.

1.4 Purpose of the Manual

1.4.1 The purpose of this Environmental Monitoring and Audit (EM&A) Manual is to guide the set-up of an EM&A programme to ensure compliance with the EIA Study recommendations, to assess the effectiveness of the recommended mitigation measures, to identify any further need for additional mitigation measures or remedial actions, and to provide systematic procedures for monitoring, auditing and minimising environmental impacts associated with the construction and operational activities of the Project.

1.4.2 Hong Kong environmental regulations have served as environmental standards and guidelines in the preparation of this Manual. In addition, this Manual has been prepared in accordance with the requirements stipulated in Annex 21 of the Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM).

1.4.3 This Manual contains the following information:

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

· Project organization for the EM&A work;

· 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 (A/L) 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 EM&A data and appropriate reporting procedures.

1.4.4 This Manual is a dynamic document that should be reviewed regularly and updated as necessary during the construction and operational of the Project. The Contractor should regularly review the mitigation measures and project implementation schedule in Appendix C with respect to the design developments and construction methodology.

1.5 Development Programme of the Project

Development Phasing

1.5.1 The Project would be commissioned in phases with the first population intake in Year 2033. Construction of the Project is scheduled to commence in early Year 2027, with completion targeted by 2036 to accommodate the intake of residential population, the UniTown and Integrated Hospital. The preliminary construction schedule under various phases is summarised in Table 1.2 with reference to Appendix B1. The construction programme is presented in Appendix B2.

Table 1.2 Preliminary Construction and Population Intake Schedule

Develop-ment Stage	Area	Rationale of Phasing	Earliest Date for Commencement of Infrastructure Works	Earliest Date for Availability of Land for Building Works	Anticipated First Occupation/ Population Intake Date
Phase 1	• Dedicated Rehousing Estate (DRE) site (RSc.1) • Integrated Hospital (G.8) & adjacent Electricity Substation (ESS) site (G.9) • Part of UniTown (G.11) • Sewage pumping station (G.1) • Road network connecting to the Integrated Hospital	• Early handover of the sites for building works (by others)	Q1 2027	Q4 2028	2033 for DRE site
Phase 2	• Remaining UniTown (G.6, G.10, G.11, G.12) • Residential Site (R.3, R.4) • Remaining G/ICs, School (E.1 & E.2), Open Space (O.2, O.5-O.7), Amenity Areas • Majority of road network • NTMDC	• To commence infrastructure works for targeted population intake • To allow early handover of UniTown	Q3 2028	Q2 2031	Q2 2034
Phase 3	• Residential Site R.1, R.2 • Remaining open space • Remaining roadworks, landscape works, riverside & site formation works	• To suit the programme of interfacing projects	Q3 2030	Q3 2032	Q2 2036

Phase 1

1.5.2 Phase 1 comprises of site clearance and site formation of sites that would require early completion for handover, including DRE site “RSc.1”, Integrated Hospital “G.8”, ESS “G.9”, part of UniTown “G.11", sewage pumping station at “G.1” and road network connecting to the Integrated Hospital. The population intake of the DRE site is expected to be in Year 2033.

Phase 2

1.5.3 This phase of development aims to support the remaining UniTown and population intake projected for the Year 2034, along with the essential supporting infrastructures. Majority of these areas consist of main road network and road connection from existing road networks. There will be interface with NOL Main Line in this phase.

1.5.4 The major site formation and infrastructure works (including site clearance) in this development phase will include:

· Site formation and development for key infrastructures including retention tank, RCPs and utilities laying, etc.;

· Site formation and development for remaining areas of UniTown to facilitate completion for handover;

· Site formation for R.3 and R.4;

· Site formation and development for “E” and “G” sites such as primary school, etc.;

· Road improvement to Chuk Yau Road, Ngau Tam Mei Road and San Tam Road;

· Construction of District Distributor Road D1, proposed road connection to/from STT, Road L1, Road L2, Road L3, associated junction works and slip roads connecting San Tin Highway and local roads, pedestrian and cycling connectivity including cycle bridge, associated pedestrian walkway and cycle tracks;

· Site clearance and revitalisation of NTMDC; and

· Construction of associated open space and amenity areas.

Phase 3

1.5.5 The development in this phase is to support the remaining population intake in Year 2036 and to develop the remaining sites that are currently occupied by the transitional housing project in the western part of the NDA and NOL Main Line works area. There will be interface with the transitional housing and NOL Main Line in this phase.

1.5.6 The major site formation and infrastructure works in this development phase will include:

· Site formation for R.1 and R.2 after partial demolition of the transitional housing;

· Development of open space after partial demolition of the transitional housing; and

· Remaining roadworks, landscape works, riverside and site formation works.

1.6 Project Organisation

1.6.1 The roles and responsibilities of the various parties involved in the EM&A process and the organisational structure of the organisation responsible for implementing the EM&A programme are outlined below. The proposed project organisation and lines of communication with respect to environmental protection works are shown in Appendix A.

The Contractor

1.6.2 The Contractor should report to the ER. The duties and responsibilities of the Contractor are:

· Implement the EIA recommendations and requirements;

· Strictly adhere to the guidelines and requirements in this Manual;

· Provide assistance to the ET in carrying out relevant environmental monitoring and auditing, and investigation related to non-compliance;

· Participate in the joint site inspections undertaken by ET, and undertake corrective action(s) as necessary;

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

· Submit proposals on mitigation measures in case of exceedances of A/L levels, in accordance with the Event and Action Plans;

· Implement measures to reduce environmental impacts where A/L levels are exceeded until the events are resolved; and

· Adhere to the procedures for carrying out environmental complaint investigation.

Environmental Team

1.6.3 The ET should conduct the EM&A programme and ensure the Contractor’s compliance with the Project’s environmental performance requirements during construction. The ET should be an independent party from the IEC and the Contractor.

1.6.4 An ET should be established before the commencement of construction of the Project. The ET should be led and managed by the ET Leader (ETL). The ETL should possess at least 7 years of experience in EM&A and/or environmental management. The ET should monitor the mitigation measures implemented by the Contractor on a regular basis to ensure the compliance with the intended aims of the measures. The duties and responsibilities of the ET are:

· Set up all the required environmental monitoring stations;

· Monitor various environmental parameters and implementation of environmental mitigation measures as required in this Manual;

· Review construction programme and methodology, and comment as necessary;

· Carry out regular and ad hoc site inspections to investigate and audit Contractor’s site practice, equipment and work methodologies with respect to pollution control and environmental mitigation measures, and anticipate environmental issues for proactive and practicable action before problems arise;

· Analyse the EM&A data, review the success of EM&A programme to confirm the adequacy of mitigation measures implemented and the validity of the EIA predictions, and to identify any adverse environmental impacts arising and report EM&A results to the Contractor, IEC, and the ER;

· Liaise with IEC on all environmental performance matters, and timely submission of all relevant EM&A proforma for IEC's approval;

· Audit the relevant document(s)/record(s) and prepare reports on the environmental monitoring data and the site environmental conditions;

· Review the proposals of remedial measure from the Contractor and recommend suitable mitigation measures in the case of exceedances of A/L levels, in accordance with the Event and Action Plans;

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

· Follow up and close out non-compliance actions;

· Submit the EM&A report(s) to the project proponent and the Environmental Protection Department (EPD) timely; and

· Adhere to the procedures for carrying out environmental complaint investigation.

Engineer or Engineer’s Representative

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

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

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

· Participate in joint site inspections and audits undertaken by the ET;

· Comply with the agreed Event and Action Plans in the event of any exceedance; and

· Adhere to the procedures for carrying out exceedance and complaint investigations.

Independent Environmental Checker

1.6.6 The IEC should be employed by the ER / project proponent before commencement of construction of the Project. The IEC should possess at least 10 years of experience in EM&A and/or environmental management and should be an independent party from the ET and the Contractor. The duties and responsibilities of the IEC are:

· Review and audit at not less than monthly intervals in an independent, objective and professional manner in all aspects of the EM&A programme;

· Validate and confirm the accuracy of monitoring results, monitoring equipment, monitoring locations, monitoring procedures and locations of sensitive receivers;

· Audit the EIA recommendations and requirements against the status of implementation of environmental protection measures on site;

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

· On as-needed basis, verify and certify the environmental acceptability of the Environmental Permit (EP) holder’s construction methodology (both temporary and permanent works), relevant design plans and submissions under the EP;

· Carry out random sample check and audit on monitoring data and sampling procedures, etc;

· Conduct random site inspections;

· Verify the investigation results of environmental complaint cases and the effectiveness of corrective measures;

· Verify EM&A report that has been certified by the ETL; and

· Provide feedback on the audit results to the ET, the ER or the project proponent according to Event and Action Plans in this Manual.

1.7 Structure of the Manual

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

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

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

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

· Section 5 – Sets out EM&A requirement for sewerage and sewage treatment implications;

· Section 6 – Sets out EM&A requirement for waste management implications;

· Section 7 – Sets out EM&A requirement for land contamination;

· Section 8 – Sets out EM&A requirement for ecological implication (terrestrial and aquatic);

· Section 9 – Sets out EM&A requirement for fisheries impact;

· Section 10 – Sets out EM&A requirement for landscape and visual impact;

· Section 11 – Sets out EM&A requirement for impact on cultural heritage;

· Section 12 – Sets out EM&A requirement for hazard to life;

· Section 13 – Sets out EM&A requirement for landfill gas hazard;

· Section 14 – Sets out EM&A requirement for impact from electric and magnetic field;

· Section 15 – Describes the scope and frequency of environmental site audits and sets out the general requirements of the EM&A programme; and

· Section 16 – Details the EM&A reporting requirements.

2 Air Quality Impact

2.1 Introduction

2.1.1 Potential air quality impacts arising from the construction phase of the Project were assessed in the EIA Report. The major air quality impact from the construction works of the Project would mainly be related to construction dust from excavation, material handling, spoil removal and wind erosion. No adverse air quality impact from construction of the Project would be anticipated with the implementation of the proposed mitigation measures. Nonetheless, construction dust monitoring and regular site audit are recommended during the construction phase so as to check compliance with the legislative requirements.

2.1.2 Cumulative air quality impact arising from the vehicular emission from existing and planned open roads, proposed Transport Interchange Hub and Public Transport Terminus, existing heavy goods vehicles/coach parking sites, as well as existing and planned industrial emissions were assessed in the EIA Report. No adverse air quality impact on the existing and planned sensitive receivers is anticipated. Hence, no air quality monitoring and site inspections are required during operational phase.

2.1.3 Cumulative odour impact from the planned (i.e. the proposed SPS), and existing odour sources (i.e. livestock farms, lard boiling factory, sewage treatment plant at Tam Mei Barracks (TMB)) were assessed in the EIA Report. Adverse cumulative odour impact is not expected with the proposed mitigation measures in place. Hence, no air quality monitoring and site inspections are required during operational phase.

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

2.2 Construction Dust Monitoring Parameters and Equipment

2.2.1 For regulatory purpose, the respirable suspended particulate (RSP) and fine suspended particulate (FSP) levels should be measured by the mean of air sensor such that variation in dust impact on a real-time basis could be observed and any dusty activities occurring in the concerned area can be identified. Weather data including temperature, relative humidity, pressure, wind speed and wind direction should also be monitored simultaneously with air sensor. Other special phenomena and work progress of the concerned site, etc., should also be recorded in detail during monitoring period.

2.2.2 An air sensor to be employed should meet the purpose of the monitoring which are 1-hour RSP, and 24-hour RSP and 24-hour FSP concentrations in the ambient air in minute-averaged monitoring data. The air sensor should have a resolution of at least 1µg/m³, an accuracy of ± 10% to standard particles, equipped with a shelter to protect the sensor and capable of operating continuously for a 7-day period. It should be capable of detection of RSP and FSP, while size specification would be optional subject to the environmental management strategy of the site. The measurement range and detection limit of the air sensor should be able to measure the full range of particulates commonly found in the ambient, e.g. 0 – 1000 µg/m³. The installation and operating procedures of the instrument should be followed by the operation manual supplied by the instrument manufacturer. The ET should propose the instrument model and seek approval from IEC. The ET should follow the operation manual to ensure the normal operation of the instrument.

2.2.3 Air sensor network which comprises one or more sensors should be employed near works sites/works areas of the Project to capture the worst cumulative impact from particulates concentration. Generally, air sensor should be placed at least 1.5 metres above ground, and away from any obstruction, vegetation or emission source which would interfere with the measurement. Other factors of the monitoring location, such as security, availability of power supply and reliable communication (cellular, Wi-Fi, etc.) should also be considered.

2.2.4 To ensure the measurements are of acceptable air quality, the ET should calibrate the monitoring equipment regularly. However, air sensor cannot be calibrated in the same way as standard method. Instead, the performance of the air sensor will be checked by a process called collocation which places the sensors near a transfer standard (TS) and operating them simultaneously under the same conditions. Instead of adjusting the physical setting of an air sensor, which is often not possible, correction of raw data or response produced by the air sensor will be carried out to better match the reference monitor data by applying a scaling factor to the raw data.

2.2.5 Right before each on-site calibration, the TS itself needs to be calibrated. Federal Reference Method (FRM) or Federal Equivalent Method (FEM) particulate matter (PM) monitor maintained at the accredited laboratories or research institutes are the PM reference monitors available in Hong Kong. The collocation of TS with PM reference monitor should last at least seven days. The TS is usually left collocated with PM refence monitor when not being moved around the sensor network.

2.2.6 The TS with known performance characteristics will visit each air sensor on the field for collocation. During collocation, the TS should be placed near the subject sensor (<1m if practicable) so that both devices would be monitoring under the same environment, i.e. the same pollution sources and weather conditions. The TS should be first warmed up for 30 – 60 minutes and then left running with the subject sensor for the collocation period (at least three hours). The measurements from the subject sensor and TS during the collocation period will be statistically analysed.

2.2.7 The response of the air sensor 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

1. 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 μg/m³ and >25µg/m³ as recommended span range for RSP and FSP, respectively) during the collocation period, Tier 2 will apply.

Tier 2: Root Mean Squared Error

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

2.2.8 On-site checking of the monitoring equipment should be conducted by ET according to Appendix D. The collocation of TS and each air sensor on the field should be carried out every month. If an air sensor failed in 3 consecutive collocations, the air sensor should be checked or maintained to improve its performance, or it should be replaced.

2.2.9 Wind data monitoring equipment should also be provided and set up at conspicuous locations for logging wind speed and wind direction close to/or at the construction dust monitoring locations. The equipment installation location should 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 should be observed.

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

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

c. The wind data monitoring equipment should be re-calibrated at least once every six months; and

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

2.2.10 Before commencing the construction dust monitoring, the ET should formulate construction dust monitoring plan with air sensor and submit to IEC to seek their feedback and consent. The plan should include but not limited to the followings:

· Details on the pollutants and environmental parameters to be monitored;

· Describe the equipment and measurement method to be used;

· Address the criteria for placing air sensors;

· Discuss the monitoring locations selected and rationale;

· Describe the criteria for selecting air sensors and test to determine if they are working properly;

· Determine the collocation location and establish the calibration and/or collocation and data correction methods;

· Identify types of data that may be used in the data analysis, including nearby reference monitor data, weather data, etc.;

· List the procedures to maintain and operate air sensors, including site visits, routine maintenance, emergency maintenance, daily data review, periodic collocations, etc.; and

· Describe the data processing (including data checking against Quality Assurance and Quality Control (QA/QC) procedures, data validation, data storage) and reporting requirements.

2.2.11 The ET is responsible for the provision of the monitoring equipment and should provide sufficient number of air sensors for the field work and TS for carrying out continuous impact monitoring and ad-hoc monitoring or collocation.

2.2.12 If the ET proposes alternative dust monitoring equipment / wind data monitoring equipment / methodology after the approval of this Manual, agreement from the IEC should be sought. The instrument should also be calibrated monthly following the requirements specified by the equipment manufacturers.

2.3 Construction Dust Monitoring Stations

2.3.1 The tentative locations of the air sensors are listed in Table 2.1 and are illustrated in Figure 2.1. The actual locations would be subject to site constraints and the ET should agree with IEC on the position of the air sensor for installation taken into account the considerations detailed in Section 2.2.3.

Table 2.1 Proposed Construction Dust Monitoring Stations

Monitoring Station No.⁽¹⁾⁽³⁾	Air Sensitive Receiver (ASR)
DM1	La Maison Vineyard
DM2	The Vineyard / Village House near Vineyard Boulevard
DM3	Greenacres Villa
DM4	Ha San Wai / EMINENT EIS International Preschool
DM5	Wah On Villa / San Wai Tsuen
DM6	Kadoorie Villas
DM7	Sheung Chuk Yuen
DM8	Hongtai Home for the Aged
DM9	Village House ⁽²⁾
DM10	Village House ⁽²⁾
DM11	Village House ⁽²⁾
DM12	Village House ⁽²⁾

Notes:

(1) RSP and FSP impact monitoring should be conducted at the monitoring stations when there are Project-related major construction activities including site formation, excavation and piling works being undertaken within a radius of 500 m from the monitoring stations.

(2) Monitoring will not be necessary if the proposed location is demolished/resumed under other project.

(3) Monitoring station at the ASR should, where practicable, be positioned as close as possible to the works site with major site activities, subject to future liaison and agreement with respective ASR.

2.3.2 The status and locations of construction dust monitoring locations may change after this Manual is issued. In such case, the ET should propose alternative monitoring locations and seek approval from the ER and IEC as well as agreement from the EPD.

2.3.3 When alternative monitoring locations are proposed, the monitoring stations should be chosen based on the following criteria:

· Monitoring at ASRs close to the major site activities which are likely to have air quality impacts;

· Monitoring as close as possible to the ASRs as defined in the EIAO-TM;

· Assurance of minimal disturbance to the occupants and working under a safe condition during monitoring; and

· Take into account the prevailing meteorological conditions.

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

· a horizontal platform with appropriate support to secure the instrument against gusty wind should be provided;

· 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;

· the distance between the instrument and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the instrument;

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

· any wire fence and gate, to protect the instrument, should not cause any obstruction during monitoring;

· no furnace or incinerator flue is nearby;

· airflow around the instrument is unrestricted;

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

· a secured supply of electricity is needed to operate the instrument.

2.3.5 Subject to site conditions and monitoring results, the ET, with IEC and EPD endorsement, may decide whether the monitoring locations should be removed / relocated during the construction phase.

2.4 Construction Dust Impact Monitoring

2.4.1 The ET should carry out hourly impact monitoring of RSP and FSP continuously with air sensor networks during major construction activity of the Project being undertaken within a radius of 500 m from the monitoring stations. The daily averages of RSP and FSP are to be determined and reported in monthly EM&A Report, together with the hourly RSP data. The impact monitoring programme is summarised in Table 2.2.

2.4.2 The monthly collocation schedule should be drawn up by the ET one month prior to the commencement of the scheduled construction period. Before commencement of the collocation, the ET should inform the IEC such that the IEC can conduct an on-site audit.

Table 2.2 Summary of Construction Dust Monitoring Programme

Monitoring Period	Duration	Sampling Equipment	Sampling Parameter	Frequency
Impact Monitoring	Throughout the construction phase⁽¹⁾	Air Sensor Network	1-hour RSP, and 24-hour RSP and FSP	Continuous (Results to be reported in Monthly EM&A Report)

Monitoring Period

Duration

Sampling Equipment

Sampling Parameter

Frequency

Impact Monitoring

Throughout the construction phase⁽¹⁾

Air Sensor Network

1-hour RSP, and 24-hour RSP and FSP

Continuous (Results to be reported in Monthly EM&A Report)

Note:

(1) Impact monitoring should be conducted at the monitoring stations for 1-hour RSP, and 24-hour RSP and FSP monitoring when there are Project-related major construction activities being undertaken within a radius of 500 m from the monitoring stations.

2.5 Construction Dust Event and Action Plan

2.5.1 The air quality criteria for the impact monitoring should refer to the relevant Air Quality Objectives (AQOs). The ET should compare the impact monitoring results with air quality criteria set up for 1-hour RSP, 24-hour RSP and FSP. Table 2.3 shows the current air quality criteria, namely A/L levels. The A/L levels may be subject to changes based on the prevailing AQOs implemented at the time of the impact monitoring.

Table 2.3 Current Action and Limit Levels for Impact Monitoring

A/L Level	Parameter	Criteria
Action Level	1-hour RSP level	128 μg/m³
Limit Level	24-hour RSP level (Rolling average)	75 μg/m³
Limit Level	24-hour FSP level (Rolling average)	37.5 μg/m³

2.5.2 The Event and Action Plan prescribes procedures and actions associated with the outcome of the comparison of air quality monitoring data recorded and the agreed A/L levels. In the cases where exceedances of these A/L levels occur, the ET, the IEC, the ER and the Contractor should strictly observe the relevant actions of the respective Event and Action Plan listed in Table 2.4.

Table 2.4 Event and Action Plan for Construction Dust Monitoring

EVENT	ACTION
ACTION LEVEL
Exceedance for one 1-hour RSP concentration	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; and 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 the ET; 2. Check Contractor’s working method; 3. Discuss with ET, ER and Contractor on possible remedial measures; 4. Advise the ET and ER on the effectiveness of the proposed remedial measures; and 5. Supervise implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing. 2. Notify Contractor; 3. In consultation with ET and IEC, agree with the Contractor on the remedial measures to be implemented; and 4. Ensure the proposal for remedial measures are properly implemented.	1. Identify source(s) of exceedance, and discuss with ER, ET and IEC on possible remedial measures; 2. Implement remedial measures; and 3. Amend working methods if appropriate.
Exceedance for two or more consecutive 1-hour RSP concentration	1. Notify IEC and ER; 2. Check the monitoring data and the performance of monitoring equipment (refer to Appendix D) 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. Discuss with IEC, ER and Contractor on possible remedial measures required; and 5. Assess effectiveness of Contractor’s remedial measures and keep IEC, and ER informed of the results until exceedance stops; and 6. Notify EPD if the exceedance is confirmed to be related to the Project.	1. Check monitoring data submitted by the ET; 2. Check Contractor’s working method and verify the performance of the monitoring equipment to be checked by ET (refer to Appendix D); 3. Discuss with ET, ER and Contractor on possible remedial measures; 4. Review and advise the ET and ER on the effectiveness of the proposed remedial measures; and 5. Supervise Implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing; 2. Notify Contractor; 3. In consultation with the ET and IEC, agree with the Contractor on the proposal for remedial measures to be implemented; and 4. Ensure the proposal for remedial measures are properly implemented.	1. Identify source(s) of exceedance and discuss with ER, ET and IEC on possible remedial measures; 2. Submit a proposal for remedial measures to ER, IEC and ET within two working days of notification of exceedance for agreement; 3. Implement the agreed proposals; and 4. Amend proposal as appropriate.
LIMIT LEVEL
Exceedance for one 24-hour rolling average RSP concentration record and/or one 24-hour rolling FSP concentration record	1. Notify IEC, ER and Contractor and EPD; 2. Check the monitoring data and the performance of the monitoring equipment (refer to Appendix D); 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; and 5. Assess effectiveness of Contractor’s remedial measures and keep IEC, ER and EPD 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 the ET; 2. Check Contractor’s working method; and verify the performance of the monitoring equipment to be checked by ET (refer to Appendix D); 3. Discuss with the ET, ER and Contractor on possible remedial measures; 4. Advise the ET and ER on the effectiveness of the proposed remedial measures; 5. Review Contractors’ remedial measures whenever necessary to assure their effectiveness and advise ET and ER accordingly; and 6. Supervise implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing; 2. Notify Contractor; 3. In consultation with the ET and IEC, agree with the Contractor on the proposal for remedial measures to be implemented; 4. Ensure the proposal for remedial measures 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 exceedance is abated.	1. Identify source(s) 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, ET and IEC within two working days of notification for agreement; 4. Implement the agreed proposals; 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 exceedance is abated.

EVENT

ACTION

IEC

CONTRACTOR

ACTION LEVEL

Exceedance for one 1-hour RSP concentration

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; and

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 the ET;

2. Check Contractor’s working method;

3. Discuss with ET, ER and Contractor on possible remedial measures;

4. Advise the ET and ER on the effectiveness of the proposed remedial measures; and

5. Supervise implementation of remedial measures.

1. Confirm receipt of notification of exceedance in writing.

2. Notify Contractor;

3. In consultation with ET and IEC, agree with the Contractor on the remedial measures to be implemented; and

4. Ensure the proposal for remedial measures are properly implemented.

1. Identify source(s) of exceedance, and discuss with ER, ET and IEC on possible remedial measures;

2. Implement remedial measures; and

3. Amend working methods if appropriate.

Exceedance for two or more consecutive 1-hour RSP concentration

1. Notify IEC and ER;

2. Check the monitoring data and the performance of monitoring equipment (refer to Appendix D) 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. Discuss with IEC, ER and Contractor on possible remedial measures required; and

5. Assess effectiveness of Contractor’s remedial measures and keep IEC, and ER informed of the results until exceedance stops; and

6. Notify EPD if the exceedance is confirmed to be related to the Project.

1. Check monitoring data submitted by the ET;

2. Check Contractor’s working method and verify the performance of the monitoring equipment to be checked by ET (refer to Appendix D);

3. Discuss with ET, ER and Contractor on possible remedial measures;

4. Review and advise the ET and ER on the effectiveness of the proposed remedial measures; and

5. Supervise Implementation of remedial measures.

1. Confirm receipt of notification of exceedance in writing;

2. Notify Contractor;

3. In consultation with the ET and IEC, agree with the Contractor on the proposal for remedial measures to be implemented; and

4. Ensure the proposal for remedial measures are properly implemented.

1. Identify source(s) of exceedance and discuss with ER, ET and IEC on possible remedial measures;

2. Submit a proposal for remedial measures to ER, IEC and ET within two working days of notification of exceedance for agreement;

3. Implement the agreed proposals; and

4. Amend proposal as appropriate.

LIMIT LEVEL

Exceedance for one 24-hour rolling average RSP concentration record and/or one 24-hour rolling FSP concentration record

1. Notify IEC, ER and Contractor and EPD;

2. Check the monitoring data and the performance of the monitoring equipment (refer to Appendix D);

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; and

5. Assess effectiveness of Contractor’s remedial measures and keep IEC, ER and EPD 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 the ET;

2. Check Contractor’s working method; and verify the performance of the monitoring equipment to be checked by ET (refer to Appendix D);

3. Discuss with the ET, ER and Contractor on possible remedial measures;

4. Advise the ET and ER on the effectiveness of the proposed remedial measures;

5. Review Contractors’ remedial measures whenever necessary to assure their effectiveness and advise ET and ER accordingly; and

6. Supervise implementation of remedial measures.

1. Confirm receipt of notification of exceedance in writing;

2. Notify Contractor;

3. In consultation with the ET and IEC, agree with the Contractor on the proposal for remedial measures to be implemented;

4. Ensure the proposal for remedial measures 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 exceedance is abated.

1. Identify source(s) 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, ET and IEC within two working days of notification for agreement;

4. Implement the agreed proposals;

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 exceedance is abated.

2.6 Construction Dust Mitigation Measures

2.6.1 Site-specific dust mitigation measures recommended in the EIA Report include watering on active works sites / works areas, exposed areas and haul roads, good site practices and dust suppression measures stipulated in Air Pollution Control (Construction Dust) Regulation. Details of the mitigation measures are presented in Appendix C. The Contractor should be responsible for the design and implementation of these measures.

2.7 Construction Dust Audit Requirements

2.7.1 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 Impact

3.1 Introduction

3.1.1 Construction noise, road traffic noise, fixed noise sources, airborne rail noise and ground-borne rail noise impacts were assessed in the EIA Report.

3.1.2 With the mitigation measures in place, no adverse construction noise impact would be anticipated. A Construction Noise Management Plan (CNMP), which contains a quantitative construction noise impact assessment, noise mitigation measures, monitoring and audit programme, event and action plan and implementation schedule should be submitted before tender invitation and before the commencement of construction works to evaluate the potential construction noise impacts and assess the effectiveness and practicality of all proposed noise mitigation measures for the Project. The implementation of the mitigation measures recommended in CNMP should also be audited as part of the EM&A programme. Regular site environmental audit during construction phase is recommended to ensure proper implementation of mitigation measures and good site practices.

3.1.3 Although no adverse road traffic noise impact is anticipated from the Project with the proposed mitigation measures in place, road traffic noise levels should be monitored at selected representative noise sensitive receivers (NSRs) located in the vicinity of the proposed at-source mitigation measures, during the first year of road opening and population intake of protected NSRs to ascertain that the recommended at-source mitigation measures are effective in reducing the noise levels.

3.1.4 There are no proposed fixed noise sources under the DPs of the Project. For the non-DPs, a quantitative fixed noise impact assessment (FNIA) with consideration of latest available information and cumulative impacts, together with recommendation of appropriate mitigation measures, should be conducted during detailed design stage via various planning/funding/land lease mechanism in accordance with the requirements of the Hong Kong Planning Standards and Guidelines (HKPSG). No specific EM&A requirement would be required.

3.1.5 Based on the assessment results in the approved EIA reports for NOL Main Line and High Speed Rail (HSR), no adverse airborne and ground-borne rail noise impact would be anticipated with the mitigation measures in place. Noise monitoring for rail noise is not required during the operational phase of the Project.

3.1.6 This section presents the requirements, methodology, equipment, monitoring locations, criteria and protocols for the monitoring and audit of construction noise impacts during the construction and road traffic noise impacts during operational phase of the Project.

3.2 Construction Phase

Noise Parameters

3.2.1 The construction noise level should be measured in terms of the 30-minute A-weighted equivalent continuous sound pressure level (L_eq_30min), which should be used as the monitoring parameter, for the time period between 0700 and 1900 hours on normal weekdays.

3.2.2 Supplementary information for data auditing and statistical results such as L₁₀ and L₉₀ should also be obtained for reference. A sample data record sheet is shown in Appendix E for reference.

Monitoring Equipment and Set up

3.2.3 As referred to the requirements of 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 should be used for carrying out the noise monitoring. Immediately prior to and following each noise measurement, the accuracy of the sound level meter should be checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements should be accepted as valid only if the difference between calibration levels obtained before and after the noise measurement is less than 1.0 dB(A).

3.2.4 The construction noise monitoring station should normally be at a point 1 m from the exterior of the noise sensitive facade and be at a position 1.2 m above ground. The ET should agree with the IEC on the monitoring position and the corrections as required according to standard acoustic principles.

3.2.5 Noise measurements should be made in accordance with standard acoustic principles and practices in the relation to weather conditions. Noise measurements should 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 should be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

3.2.6 The ET is responsible for the provision of the monitoring equipment and should ensure that sufficient noise measuring equipment and associated instrumentation are available for carrying out the baseline monitoring and impact monitoring. All the equipment and associated instrumentation should be clearly labelled. The equipment installation location should be proposed by the ET Leader and agreed with the ER and IEC.

Baseline and Impact Monitoring

3.2.7 Baseline noise monitoring should be carried out at the monitoring stations to be designated in the CNMP(s) as appropriate for at least 2 weeks prior to the commissioning of the construction works. During the baseline monitoring, there should not be any construction activities as far as practicable in the vicinity of the designated monitoring stations.

3.2.8 During impact monitoring, construction noise monitoring should be carried out at the designated monitoring stations between 0700 and 1900 hours on normal weekdays when there are Project-related construction activities being undertaken within a radius of 300m from the respective monitoring stations.

3.2.9 As discussed in Section 3.1.2, a CNMP should be submitted to EPD before tender invitation and before the commencement of construction works. Subject to the contractual arrangement, land resumption status and construction progamme as well as the assessment findings of quantitative construction noise impact assessment, the details of the construction noise monitoring requirements and audit programme, event and action plan and implementation schedule should be derived and included in the CNMP(s) for agreement with EPD.

Action and Limit Levels

3.2.10 The A/L levels for construction noise are defined in Table 3.1.

Table 3.1 Action and Limit Levels for Airborne Construction Noise Impact Monitoring

Time Period	Action Level	Limit Level
0700 - 1900 hours on normal weekdays ⁽¹⁾	When one documented complaint is received	75 dB(A) ⁽²⁾

Notes:

(1) If works are to be carried out during restricted hours, the conditions stipulated in the Construction Noise Permit issued by the Noise Control Authority have to be followed.

(2) 70 dB(A) for educational institutions and 65 dB(A) during school examination periods.

3.3 Operational Phase – Road Traffic Noise

Noise Parameters

3.3.1 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’s roads. The noise monitoring should be carried out during the first year of road opening. The road traffic noise during operation of the Project’s roads should be measured in terms of the A-weighted equivalent of L_{10 (1-hr)}. During the road traffic noise measurement, traffic count including traffic volume, percentage of heavy vehicles as defined in the Calculation of Road Traffic Noise 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.

3.3.2 Noise measurements should 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 should be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

Monitoring Stations

3.3.3 Representative NSRs that are mostly affected were identified in the EIA Report are selected as the noise monitoring stations in this Manual, with their locations listed in Table 3.2 and illustrated in Figure 3.1. The proposed location at the planned NSR should be defined during detailed design on the basis of the status of the most up-to-date information on the proposed development(s) of the Project.

Table 3.2 Proposed Road Traffic Noise Monitoring Stations during Operational Phase

Monitoring Station ID ⁽¹⁾	NSR ID in EIA Report	Noise Sensitive Receiver
For DPs
OM2	PN01	Proposed Dedicated Rehousing Estate at RSc.1
OM3	N39	Sheung Chuk Yuen
OM4	N42	Kadoorie Villas
OM5	N19	San Wai Tsuen
OM6	N44 / N19	Wah On Villa / San Wai Tsuen
OM7	N41	Hongtai Home for the Aged
For non-DPs
OM1	N09	Elegant Park

Note:

(1) Monitoring station at NSR should, where practicable, be positioned as close as possible to the Project roads, subject to future liaison and agreement with respective NSR.

3.4 Operational Phase – Fixed Noise Sources

3.4.1 For non-DP fixed noise sources, quantitative fixed noise impact assessment, with consideration of latest available information and cumulative impacts, together with recommendation of appropriate mitigation measures, should be conducted during detailed design stage via various planning/funding/land lease mechanism for agreement with Director of Environmental Protection (DEP) in accordance with the requirements of the HKPSG.

3.5 Mitigation Measures

Construction Phase

3.5.1 Mitigation measures including good site practices, use of quality powered mechanical equipment and quieter construction methods, and use of temporary movable noise barriers, noise insulating fabric or noise enclosure were recommended in the EIA Report. The implementation schedule for the recommended mitigation measures is presented in Appendix C.

3.5.2 Construction Noise Management Plan(s) (CNMP(s)) should be prepared based on the best available information before tender invitation and the commencement of construction works, subject to the contract arrangement of the Project and agreement with EPD. The CNMP(s) should include the proposed/exact inventory of noise sources, quantitative construction noise impact assessment, listing of the quieter construction method/equipment, review the effectiveness and practicality of all proposed mitigation measures for minimising the construction noise impact, implementation schedule of the mitigation measures (including implementation party, location, timing of implementation), and the details of the construction noise monitoring requirements and audit program. The CNMPs should be prepared by a Certified Noise Modelling Professional as recognised by the Hong Kong Institute of Qualified Environmental Professionals (HKIQEP), or equivalent as agreed by the DEP.

Operational Phase – Road Traffic Noise

3.5.3 Direct road traffic noise mitigation measures including low noise road surfacing (LNRS), noise barriers and acoustic windows/balconies were proposed in the EIA Report to alleviate adverse road traffic noise impact during the operational phase and are presented in Table 3.3. The implementation schedule for the recommended mitigation measures is presented in Appendix C.

Table 3.3 Extent and Locations of Proposed Direct Noise Mitigation Measures

ID	Type	Vertical Height, m	Approx. Length, m	Location
LNRS1	LNRS	N/A	260	San Tam Road
LNRS2	LNRS	N/A	511	San Tam Road
LNRS3	LNRS	N/A	80	Road L1
LNRS4	LNRS	N/A	68	Road L1
LNRS5	LNRS	N/A	151	Ngau Tam Mei Road
LNRS6	LNRS	N/A	101	Ngau Tam Mei Road
LNRS7	LNRS	N/A	110	Ngau Tam Mei Road
LNRS8	LNRS	N/A	197	Road D1
LNRS9	LNRS	N/A	42	Road D1
LNRS10	LNRS	N/A	55	Road D1
LNRS11	LNRS	N/A	294	Road D1
LNRS12	LNRS	N/A	103	Chuk Yau Road
LNRS13	LNRS	N/A	79	San Tam Road
AW1	Acoustic Windows / Balconies lined with Sound Absorptive Material	N/A	N/A	Site RSc.1 (17^th to 25^th Floor of NAP RSc.1-2e)
AW2	Acoustic Windows / Balconies lined with Sound Absorptive Material	N/A	N/A	Site RSc.1 (13^th to 33^rd Floor of NAP RSc.1-1f)
AW3	Acoustic Windows / Balconies	N/A	N/A	Site RSc.1 (8^th to 25^th Floor of NAPs RSc.1-2a; 5^th to 25^th Floor of NAP RSc.1-2b; 4^th to 25^th Floor of NAP RSc.1-2c; 3^rd to 25^th Floor of NAP RSc.1-2d; 1^st to 16^th Floor of NAP RSc.1-2e)
AW4	Acoustic Windows / Balconies	N/A	N/A	Site RSc.1 (1^st to 42^nd Floor of NAPs RSc.1-1a to RSc.1-1b; 12^th to 42^nd Floor of NAP RSc.1-1c; 1^st to 42^nd Floor of RSc.1-1d; 9^th to 42^nd Floor of RSc.1-1e; 1^st to 12^th and 34^th to 42^nd Floor of RSc.1-1f)
AW5	Acoustic Windows / Balconies	N/A	N/A	Site R.1 (8^th to 37^th Floor of NAP R.1-1a; 2^nd to 37^th Floor of NAP R.1-1b; 5^th to 37^th Floor of NAP R.1-1c; 24^th to 37^th Floor of NAP R.1-1d)
AW6	Acoustic Windows / Balconies	N/A	N/A	Site R.1 (1^st to 37^th Floor of NAP R.1-2d)
AW7	Acoustic Windows / Balconies	N/A	N/A	Site R.1 (26^th to 37^th Floor of NAP R.1-3a; 23^rd to 37^th Floor of NAP R.1-3b; 6^th to 37^th Floor of NAPs R.1-3c to R.1-3d)
AW8	Acoustic Windows / Balconies	N/A	N/A	Site R.1 (11^th to 37^th Floor of NAP R.1-4a; 10^th to 37^th Floor of NAP R.1-4b)
NB1	Vertical Noise Barrier	7	53	San Tin Highway
NB2	Vertical Noise Barrier	4.5	31	San Tam Road
NB3	Vertical Noise Barrier	2.5	43	San Tam Road
NB4	Vertical Noise Barrier	2	18	San Tam Road
NB5	Vertical Noise Barrier	2.5	24	San Tam Road
NB6	Vertical Noise Barrier	4	10	San Tam Road
NB7	Vertical Noise Barrier	4	8	San Tam Road
NB8	Vertical Noise Barrier	2	48	Road D1
NB9	Vertical Noise Barrier	3	189	Road D1
NB10	Vertical Noise Barrier	5.5	80	Road D1
NB11	Vertical Noise Barrier	3	25	Road D1
NB12	Vertical Noise Barrier	4	71	Road D1
NB13	Vertical Noise Barrier	2.5	47	Site A.4
NB14	Vertical Noise Barrier	2	44	Road L1
CB1	7m (H) Vertical Noise Barrier with 3m Cantilever at 45 Degree	7	193	San Tin Highway
CB2	7m (H) Vertical Noise Barrier with 3m Cantilever at 45 Degree	7	118	San Tin Highway

Operational Phase – Fixed Noise Sources

3.5.4 The tentative mitigation measures as recommended in the EIA Report for the proposed fixed noise sources under the Project include enclosing pumps and noisy plants inside building structures, proper selection of quiet plant, installation of silencer/acoustic enclosure/acoustic louvre for the exhaust of ventilation system and locating openings of ventilation systems away from NSRs as far as practicable. Details of the suggested mitigation measures are presented in Appendix C. These measures should be reviewed and refined as appropriate by the proponent of the proposed fixed noise sources if there are any major design changes during the detailed design phase such that the recommended measures are adequate for alleviating the potential operational fixed noise sources impact.

3.6 Audit Requirements

3.6.1 Regular site environmental audit during the construction phase of the Project should be conducted at least once per week to ensure proper implementation of mitigation measures and good site practices as listed in Appendix C and the noise control requirements stated in EPD’s "Recommended Pollution Control Clauses for Construction Contracts” to further minimise the potential noise nuisance during construction phase.

4 Water Quality impact

4.1 Introduction

4.1.1 Potential water quality impacts arising from the construction and operational phases of the Project were identified and assessed in the EIA Report. With the implementation of the recommended mitigation measures, no adverse water quality impacts from the Project would be expected during the construction and operational phases of the Project. Nevertheless, water quality monitoring at NTMDC should be conducted before, during and after the construction phase. Regular inspections of the construction activities throughout the construction phase should also be conducted to ensure that the recommended mitigation measures are properly implemented. With proper implementation of mitigation measures during detailed design stage, no monitoring or audit is required during the operational phase.

4.2 Construction Phase

Monitoring Parameters

4.2.1 Monitoring for Dissolved Oxygen (DO), Dissolved Oxygen Saturation (DO%), temperature, pH, turbidity, salinity, suspended solid (SS) and water depth should be undertaken at all designated monitoring stations. All parameters should be measured in-situ whereas SS should be determined by the laboratory. DO should be presented in mg/L and in % saturation.

4.2.2 Other relevant data should also be recorded, including monitoring station / position, time, tidal stages, weather conditions and any special phenomena or work underway at the construction site. A sample data record sheet is shown in Appendix E for reference.

Monitoring Equipment

4.2.3 The following equipment and facilities should be provided by the ET and used for the water quality monitoring.

Monitoring Position Equipment

4.2.4 A hand-held or boat-fixed type digital Differential Global Positioning System (DGPS) with way point bearing indication or other equipment instrument of similar accuracy, should be provided and used during water quality monitoring to ensure the correct position before taking measurement and water samples.

Sampler

4.2.5 A water sampler is required. It should comprise a transparent PVC cylinder, with a capacity of not less than 2 litres, which can be effectively sealed with latex cups at both ends. The sampler should have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth (e.g. Kahlsico Water Sampler or an approved similar instrument).

Water Depth Detector

4.2.6 A portable, battery-operated echo sounder should be used for the determination of water depth at each designated monitoring station. This unit can either be hand-held or affixed to the bottom of the work boat, if the same vessel is to be used throughout the monitoring programme.

Dissolved Oxygen and Temperature Measuring Instrument

4.2.7 The instrument should be a portable and weatherproof DO measuring instrument complete with cable and sensor, and use a DC power source. The equipment should be capable of measuring:

· a DO-level in the range of 0 - 20 mg/L and 0 - 200% saturation; and

· a temperature of 0 - 45 degree Celsius with a capability of measuring to ±0.1 degree Celsius.

4.2.8 It should have a membrane electrode with automatic temperature compensation complete with a cable. Sufficient stocks of spare electrodes and cables should be available for replacement where necessary, for example, YSI model 59 meter, YSI 5739 probe, YSI 5795A submersible stirrer with reel and cable or an approved similar instrument.

4.2.9 Should salinity compensation not be built-in to the DO equipment, in-situ salinity should be measured to calibrate the DO equipment prior to each DO measurement.

Turbidity Measuring Instrument

4.2.10 Turbidity should be measured in-situ by the nephelometric method. The instrument should be portable and weatherproof using a direct current (DC) power source complete with cable, sensor and comprehensive operation manuals. It should have a photoelectric sensor capable of measuring turbidity between 0 - 1000 NTU (e.g. Hach model 2100P or an approved similar instrument). The cable should not be less than 25m in length. The meter should be calibrated in order to establish the relationship between NTU units and the levels of suspended solids.

Salinity Measuring Equipment

4.2.11 A portable salinometer capable of measuring salinity in the range of 0 - 40 parts per thousand (ppt) should be provided for measuring salinity of the water at each monitoring station.

pH Measuring Equipment

4.2.12 The instrument should consist of a potentiometer, a glass electrode, a reference electrode and a temperature-compensating device. It should be readable to 0.1 pH in a range of 0 to 14. Standard buffer solutions of at least pH 7 and pH 10 should be used for calibration of the instrument before and after use. Details of the method should comply with American Public Health Association (APHA), 19th Edition 4500-HTB.

Sample Containers and Storage

4.2.13 Water samples for SS determination should be stored in suitable containers with no preservative added, packed in ice (cooled to 4℃ without being frozen) and delivered to the laboratory and analysed as soon as possible after collection. Sufficient volume of samples should be collected to achieve the detection limit.

Calibration of in-situ Instruments

4.2.14 All in-situ monitoring instruments should be checked, calibrated and certified by a laboratory accredited under Hong Kong Laboratory Accreditation Scheme (HOKLAS) or any other international accreditation scheme before use and subsequently re-calibrated at three monthly intervals throughout all stages of the water quality monitoring programme. Responses of sensors and electrodes should be checked with certified standard solutions before each use. Wet bulb calibration for a DO meter should be carried out before measurement at each monitoring station.

4.2.15 For the on-site calibration of field equipment, the BS 127:1993, Guide to Field and On-Site Test Methods for the Analysis of Water should be observed.

4.2.16 Sufficient stocks of spare parts should be maintained for replacements when necessary. Backup monitoring equipment should also be made available so that monitoring can proceed uninterrupted even when some equipment is under maintenance, calibration, etc.

Laboratory Measurement / Analysis

4.2.17 Analysis of SS level should be carried out in a HOKLAS or other international accredited laboratory that is HOKLAS-equivalent. Sufficient volume of each water sample should be collected at the monitoring stations for carrying out the laboratory SS determination. All samples should be assigned a unique code and accompanied by Chain of Custody sheets.

4.2.18 The SS determination work should start within 24 hours after collection of the water samples. The SS analyses should follow the standard method APHA 2540D with a detection limit of 1 mg/L as described in APHA Standard Methods for the Examination of Water and Wastewater, 21^st Edition, unless otherwise specified.

4.2.19 Detailed testing methods, pre-treatment procedures, instrument use, QA/QC details (such as blank, spike recovery, number of duplicate samples per batch, etc.), detection limits and accuracy should be submitted to EPD for approval prior to the commencement of monitoring programme. EPD may also request the laboratory to carry out analysis of known standards provided by EPD for quality assurance. The testing methods and related proposal should be checked and certified by IEC before submission to EPD for approval.

4.2.20 Additional duplicate samples may be required by EPD for inter laboratory calibration. Remaining samples after analysis should be kept by the laboratory for 3 months in case repeat analysis is required. If in-house or non-standard methods are proposed, details of the method verification may also be required to submit to EPD. In any circumstance, the sample testing should have comprehensive QA/QC control programmes. The laboratory should prepare to demonstrate the programmes to EPD or his representatives when requested.

Monitoring Schedule and Stations

4.2.21 The proposed water quality monitoring schedule should be submitted to EPD at least two weeks before the first day of the monitoring month. EPD should also be notified immediately for any changes in schedule. The monitoring stations proposed in this section are indicative and are subject to further review before the construction phase. The locations of monitoring stations may change after issuing this Manual. The proposed monitoring stations should be submitted four weeks before commencement of baseline monitoring for EPD approval.

4.2.22 When alternative monitoring stations are proposed, they should be chosen based on the following criteria:

· close to the sensitive receptors which are directly or likely to be affected;

· for monitoring stations located in the vicinity of the sensitive receptors, care should be taken to cause minimal disturbance during monitoring; and

· control station should be at representative location of the Project Site and in its undisturbed condition, and should be located both upstream and downstream of the works sites as far as practicable.

4.2.23 It is proposed to monitor the water quality at three locations (i.e. M1 to M3) and one control station (i.e. C1) in NTMDC. Impact stations (i.e. M1 to M3) are designated in the vicinity of revitalisation works within the Project Site to measure any elevation of pollutant levels (e.g. SS level) due to the Project. Control station (i.e. C1) is assigned upstream of the NTMDC to compare the monitored water quality from the proposed impact stations (i.e. M1 to M3) with the ambient water quality during the ebb tide and flood tide. All the proposed river water quality monitoring stations are listed in Table 4.1 and their locations are shown in Figure 4.1.

Table 4.1 Proposed River Water Quality Monitoring Stations for Baseline, Construction Phase and Post-Construction Monitoring

Station	Description	Easting	Northing
C1	Control Station	826198	837341
M1	Impact Station	825129	837248
M2	Impact Station	824483	837636
M3	Impact Station	823590	837728

Monitoring Requirements

4.2.24 Baseline, impact and post-construction monitoring should be conducted and the following requirements should be followed:

· Measurement should be taken at three water depths, namely, 1m below water surface, mid-depth and 1m above riverbed, except where the water depth is less that 6m, the mid-depth station could be omitted. Should the water depth be less than 3m, only the mid-depth station will be monitored. The ET should agree with EPD on all the monitoring stations;

· Duplicate in-situ measurements and water samples collected from each independent monitoring event are required for all parameters to ensure a robust statistically interpretable dataset;

· No sampling should be carried out when typhoon signal No. 3 or above or black rainstorm signal is hoisted; and

· At each measurement depth, two consecutive measurements should be taken. The probes should be retrieved out of the water after the first measurement and then redeployed for the second measurement. When the difference in value between the first and second measurement of on-site parameters is more than 25% of the value of the first reading, the reading should be discarded and further readings should be taken.

Baseline Monitoring

4.2.25 Baseline conditions for river water quality should be established and agreed with EPD prior to the commencement of works at NTMDC. The purposes of the baseline monitoring are to establish ambient conditions prior to the commencement of the works and to demonstrate the suitability of the proposed monitoring stations. A baseline monitoring report should be submitted to EPD at least four weeks before the commencement of works at NTMDC for agreement. The baseline monitoring report should be certified by the ET Leader and verified by IEC before submission to EPD.

4.2.26 The baseline conditions should be established by measuring water quality parameters as specified in Section 4.2.1 and Section 4.2.2 at the designated monitoring stations as shown in Table 4.1. The measurement depths should follow those specified in Section 4.2.24. The measurements should be taken at all designated monitoring stations including control station, three days per week, at mid-flood and mid-ebb tides, for at least four weeks prior to the commencement of works at NTMDC. There should not be any river construction activities in the vicinity of the stations during the baseline monitoring. The interval between two sets of monitoring should not be less than 36 hours.

Impact Monitoring

4.2.27 During the construction period of the proposed revitalisation works at NTMDC, impact monitoring should be undertaken three days per week, at mid-flood and mid-ebb tides, with sampling/measurement at all designated monitoring stations including control station as specified in Table 4.1. The interval between two sets of monitoring should not be less than 36 hours except where there are exceedances of action and/or limit levels, in which case the monitoring frequency will be increased. The monitoring parameters and measurement depths should follow those specified in Section 4.2.1, Section 4.2.2 and Section 4.2.24. Duplicate water samples should be taken and analysed.

4.2.28 If the impact monitoring data collected at the monitoring stations (i.e. M1 to M3) indicate that the action or limit levels as shown in Table 4.2 are exceeded, analysis should be conducted to identify whether the exceedance is caused by Project activities. If the data analysis results indicate that the exceedance is caused by this Project, appropriate actions including lowering the working rate, or rescheduling of works should be taken and additional mitigation measures should be implemented as necessary.

Post-Construction Monitoring

4.2.29 Upon completion of all works at NTMDC, a post-project monitoring should be carried out for four weeks in the same manner as the impact monitoring.

Event and Action Plan

4.2.30 The A/L levels for water quality are defined in Table 4.2. The actions in accordance with the Event and Action Plan in Table 4.3 should be carried out if the defined Action and/or Limit levels for water quality are exceeded at any designated monitoring points.

Table 4.2 Action and Limit Levels for Water Quality Monitoring

Parameters	Action Level	Limit Level
DO (mg/L)	Surface and Middle 5 percentile of baseline data	Surface and Middle 4 mg/L, or 1 percentile of baseline data
Bottom 5 percentile of baseline data	Bottom 2 mg/L, or 1 percentile of baseline data
SS (mg/L)	Depth Average 95 percentile of baseline data or 120% of upstream control station at the same tide of the same day	Depth Average 99 percentile of baseline data or 130% of upstream control station at the same tide of the same day
Turbidity (NTU)	Depth Average 95 percentile of baseline data or 120% of upstream control station at the same tide of the same day	Depth Average 99 percentile of baseline data or 130% of upstream control station at the same tide of the same day

Parameters

Action Level

Limit Level

DO (mg/L)

Surface and Middle

5 percentile of baseline data

Surface and Middle

4 mg/L, or

1 percentile of baseline data

Bottom

5 percentile of baseline data

Bottom

2 mg/L, or

1 percentile of baseline data

SS (mg/L)

Depth Average

95 percentile of baseline data or 120% of upstream control station at the same tide of the same day

Depth Average

99 percentile of baseline data or 130% of upstream control station at the same tide of the same day

Turbidity (NTU)

Depth Average

95 percentile of baseline data or 120% of upstream control station at the same tide of the same day

Depth Average

99 percentile of baseline data or 130% of upstream control station at the same tide of the same day

Remarks:

(1) "Depth Average" is calculated by taking the arithmetic means of reading of all sampling depths.

(2) For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits.

(3) For turbidity and SS, non-compliance of the water quality limits occurs when monitoring result is higher than the limits.

(4) All the figures given in the table are for reference only and EPD may amend the figures whenever it is considered as necessary.

Table 4.3 Event and Action Plan for Water Quality Monitoring

EVENT	ACTION
Action level being exceeded by one sampling day	1. Repeat in-situ measurement on next day of exceedance to confirm findings; 2. Identify reasons for non-compliance and source(s) of impact; 3. Inform IEC, Contractor and ER; and 4. Check monitoring data, all plant, equipment and Contractor’s working methods.	1. Check monitoring data submitted by ET and Contractor’s working methods.	1. Confirm receipt of notification of exceedance in writing.	1. Inform the ER and confirm notification of the non-compliance in writing; and 2. Check all plant and equipment and rectify unacceptable practice.
Action level being exceeded by two or more consecutive sampling days	1. Repeat in-situ measurement on the next day of exceedance to confirm findings; 2. Identify reasons for non-compliance and source(s) of impact; 3. Inform IEC, Contractor and ER; 4. Check monitoring data, all plant and equipment, and Contractor's working methods; 5. Discuss additional mitigation measures with IEC and Contractor and ensure mitigation measures are implemented; and 6. Prepare to increase the monitoring frequency to daily.	1. Discuss with ET and Contractor on the mitigation measures and advise the ER accordingly; 2. Assess the effectiveness of the implemented mitigation measures; and 3. Check monitoring data submitted by ET and Contractor(s)’s working methods.	1. Confirm receipt of notification of exceedance in writing; 2. Discuss with IEC on the proposed mitigation measures and agree on the mitigation measures to be implemented; 3. Ensure additional mitigation measures are properly implemented; and 4. Assess the effectiveness of the implemented mitigation measures.	1. Inform the ER and confirm notification of the non-compliance in writing; 2. Check all plant and equipment and rectify unacceptable practice; 3. Consider changes of working methods; 4. Discuss with ET and IEC and propose mitigation measures to ER within three working days; and 5. Implement the agreed mitigation measures.
Limit level being exceeded by one sampling day	1. Repeat in-situ measurement on the next day of exceedance to confirm findings; 2. Identify reasons for non-compliance and source(s) of impact; 3. Inform IEC, Contractor and ER; 4. Check monitoring data, all plant, equipment and Contractor's working methods; 5. Discuss additional mitigation measures with IEC, ER and Contractor and ensure mitigation measures are implemented; and 6. Increase the monitoring frequency to daily until no exceedance of limit level.	1. Discuss with ET and Contractor on the mitigation measures; 2. Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and 3. Assess the effectiveness of the implemented mitigation measures.	1. Confirm receipt of notification of exceedance in writing; 2. Discuss with IEC, ET and Contractor on the proposed mitigation measures and agree on the mitigation measures to be implemented; 3. Ensure additional mitigation measures are properly implemented; 4. Assess the effectiveness of the implemented mitigation measures; and 5. Request Contractor to critically review the working methods.	1. Inform the ER and confirm notification of the non-compliance in writing; 2. Check all plant and equipment and rectify unacceptable practice; 3. Consider changes of working methods; 4. Discuss with ET and IEC and propose mitigation measures to ER within three working days; and 5. Implement the agreed mitigation measures.
Limit level being exceeded by two or more consecutive sampling days	1. Repeat in-situ measurement on next day of exceedance to confirm findings; 2. Identify reasons for non-compliance and source(s) of impact; 3. Inform IEC, Contractor and ER; 4. Check monitoring data, all plant, equipment and Contractor's working methods; 5. Discuss additional mitigation measures with IEC, ER and Contractor and ensure mitigation measures are implemented; and 6. Increase the monitoring frequency to daily until no exceedance of limit level.	1. Discuss with ET and Contractor on the mitigation measures; 2. Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and 3. Assess the effectiveness of the implemented mitigation measures.	1. Confirm receipt of notification of exceedance in writing; 2. Discuss with IEC, ET and Contractor on the proposed mitigation measures and agree on the mitigation measures to be implemented; 3. Ensure additional mitigation measures are properly implemented; 4. Assess the effectiveness of the implemented mitigation measures; 5. Request Contractor to critically review the working methods; and 6. Consider and instruct, if necessary, the Contractor to slow down or to stop all or part of the construction activities until no exceedance of limit level.	1. Inform the ER and confirm notification of non-compliance in writing; 2. Check all plant and equipment and rectify unacceptable practice; 3. Consider changes of working methods; 4. Discuss with ET and IEC and propose mitigation measures to ER within three working days; 5. Implement the agreed mitigation measures; and 6. As directed by the ER, to slow down or to stop all or part of the construction activities.

EVENT

ACTION

IEC

CONTRACTOR

Action level being exceeded by one sampling day

1. Repeat in-situ measurement on next day of exceedance to confirm findings;

2. Identify reasons for non-compliance and source(s) of impact;

3. Inform IEC, Contractor and ER; and

4. Check monitoring data, all plant, equipment and Contractor’s working methods.

1. Check monitoring data submitted by ET and Contractor’s working methods.

1. Confirm receipt of notification of exceedance in writing.

1. Inform the ER and confirm notification of the non-compliance in writing; and

2. Check all plant and equipment and rectify unacceptable practice.

Action level being exceeded by two or more consecutive sampling days

1. Repeat in-situ measurement on the next day of exceedance to confirm findings;

2. Identify reasons for non-compliance and source(s) of impact;

3. Inform IEC, Contractor and ER;

4. Check monitoring data, all plant and equipment, and Contractor's working methods;

5. Discuss additional mitigation measures with IEC and Contractor and ensure mitigation measures are implemented; and

6. Prepare to increase the monitoring frequency to daily.

1. Discuss with ET and Contractor on the mitigation measures and advise the ER accordingly;

2. Assess the effectiveness of the implemented mitigation measures; and

3. Check monitoring data submitted by ET and Contractor(s)’s working methods.

1. Confirm receipt of notification of exceedance in writing;

2. Discuss with IEC on the proposed mitigation measures and agree on the mitigation measures to be implemented;

3. Ensure additional mitigation measures are properly implemented; and

4. Assess the effectiveness of the implemented mitigation measures.

1. Inform the ER and confirm notification of the non-compliance in writing;

2. Check all plant and equipment and rectify unacceptable practice;

3. Consider changes of working methods;

4. Discuss with ET and IEC and propose mitigation measures to ER within three working days; and

5. Implement the agreed mitigation measures.

Limit level being exceeded by one sampling day

1. Repeat in-situ measurement on the next day of exceedance to confirm findings;

2. Identify reasons for non-compliance and source(s) of impact;

3. Inform IEC, Contractor and ER;

4. Check monitoring data, all plant, equipment and Contractor's working methods;

5. Discuss additional mitigation measures with IEC, ER and Contractor and ensure mitigation measures are implemented; and

6. Increase the monitoring frequency to daily until no exceedance of limit level.

1. Discuss with ET and Contractor on the mitigation measures;

2. Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and

3. Assess the effectiveness of the implemented mitigation measures.

1. Confirm receipt of notification of exceedance in writing;

2. Discuss with IEC, ET and Contractor on the proposed mitigation measures and agree on the mitigation measures to be implemented;

3. Ensure additional mitigation measures are properly implemented;

4. Assess the effectiveness of the implemented mitigation measures; and

5. Request Contractor to critically review the working methods.

1. Inform the ER and confirm notification of the non-compliance in writing;

2. Check all plant and equipment and rectify unacceptable practice;

3. Consider changes of working methods;

4. Discuss with ET and IEC and propose mitigation measures to ER within three working days; and

5. Implement the agreed mitigation measures.

Limit level being exceeded by two or more consecutive sampling days