Agreement No. CE 13/2009 (WS)

In-situ Reprovisioning of Sha Tin Water Treatment Works íV South Works

 

Environmental Monitoring and Audit Manual

 

TABLE OF CONTENTS

 

1.            INTRODUCTION. 1-1

Project Description. 1-1

Purpose of the Manual 1-1

Project Organisation. 1-2

Structure of the EM&A Manual 1-4

2.            Air Quality. 2-1

Introduction. 2-1

Monitoring Parameters and Equipment 2-1

Laboratory Measurement / Analysis. 2-2

Dust Monitoring Stations. 2-3

Baseline Monitoring. 2-4

Impact Monitoring. 2-4

Compliance Assessment 2-4

Event and Action Plan. 2-5

Mitigation Measures. 2-5

3.            Noise. 3-1

Introduction. 3-1

Construction Noise. 3-1

Operation Noise íV Fixed Plant 3-5

Mitigation Measures. 3-5

4.            WAter quality. 4-1

Introduction. 4-1

Water Quality Parameters. 4-1

Monitoring Locations. 4-1

Baseline Monitoring. 4-1

Impact Monitoring. 4-2

Site Audits. 4-2

Field Log. 4-2

Monitoring Equipment 4-2

Laboratory Measurement / Analysis. 4-3

Event and Action Plan. 4-4

Mitigation Measures. 4-4

5.            waste management implications. 5-1

Introduction. 5-1

Mitigation Measures. 5-1

Audit Requirement 5-1

6.            terrestrial ecology. 6-1

Introduction. 6-1

Mitigation Measures. 6-1

Monitoring and Audit Requirements. 6-1

7.            Landsape and visual. 7-1

Introduction. 7-1

Mitigation Measures. 7-1

Audit Requirement 7-2

8.            Cultural heritage. 8-1

Introduction. 8-1

Mitigation Measures. 8-1

Audit Requirement 8-1

9.            land contamination. 9-1

Introduction. 9-1

Mitigation Measures. 9-1

Monitoring and Audit Requirements. 9-1

10.          hazard to life. 10-1

Introduction. 10-1

Mitigation and Good Practice Measures. 10-1

Audit Requirements. 10-1

11.          environmental auditing.. 11-1

Site Inspection. 11-1

Compliance with Legal and Contractual Requirements. 11-1

Environmental Complaints. 11-2

12.          Reporting.. 12-1

Introduction. 12-1

Baseline Monitoring Report 12-1

Monthly EM&A Reports. 12-2

First Monthly EM&A Report 12-2

Subsequent Monthly EM&A Reports. 12-3

Final EM&A Review Report - Construction Phase. 12-5

Data Keeping. 12-6

Interim Notifications of Environmental Quality Limit Exceedances. 12-6

 

 

List of Tables

Table 2.1 Proposed Dust Monitoring Stations

Table 2.2 Summary of Construction Dust Monitoring Programme

Table 2.3 Proposed Action and Limit Levels for Impact Monitoring

Table 2.4 Event and Action Plan for Construction Dust Monitoring

Table 3.1 Proposed Noise Monitoring Stations during Construction Phase

Table 3.2 Action and Limit Levels for Construction Noise Impact Monitoring

Table 3.3 Event and Action Plan for Construction Noise Monitoring

Table 4.1 Proposed Water Quality Monitoring Stations

Table 4.2 Analytical Methods to be Applied to Water Quality Samples

Table 4.3 Action and Limit Levels for Water Quality

Table 4.4 Event and Action Plan for Water Quality

Table 7.1 Proposed Landscape and Visual Mitigation Measures for Construction Phase

Table 7.2 Proposed Landscape and Visual Mitigation Measures for Operation Phase

 

 

List of Figures

Figure 1                    Location Plan and the Major Scope of Works

Figure 2                    Project Organization

Figure 3                    Locations of Proposed Dust Monitoring Stations

Figure 4                    Locations of Proposed Noise Monitoring Stations

Figure 5                    Locations of Proposed Water Quality Monitoring Stations

 

 

List of Appendices

Appendix A               Construction Programme

Appendix B               Data Record Sheet

Appendix B1             Data Record Sheet for TSP Monitoring

Appendix B2             Construction Noise Monitoring Field Record Sheet

Appendix B3             Water Quality Monitoring Data Record Sheet

Appendix C               Implementation Schedule and Recommended Mitigation Measures

Appendix D              Sample of the Interim Notification

 

 

Abbreviation

 

 

A/L

Action and Limit

AFCD

Agriculture, Fisheries and Conservation Department

AL

Action Level

APHA

American Public Health Association

 

 

BL

Baseline Level

 

 

CAR

Contamination Assessment Report

CEDD

Civil Engineering and Development Department

C&D

Construction and Demolition

C&DMMP

Construction and Demolition Material Management Plan

COCs

Contaminants of Concern

 

 

DEP

Director of Environmental Protection

DGPS

Differential Global Positioning System

DO

Dissolved Oxygen

 

 

EIA

Environmental Impact Assessment

EIAO-TM

Technical Memorandum on Environmental Impact Assessment Process

EM&A

Environmental Monitoring and Audit

EP

Environmental Permit

EPD

Environmental Protection Department

ER

EngineeríŽs Representative

ET

Environmental Team

 

 

GW-TM

Technical Memorandum on Noise from Construction Work other than Percussive Piling

 

 

ICE

Independent Environmental Checker

 

 

LL

Limit Level

 

 

NCO

Noise Control Ordinance

NSR

Noise Monitoring Receiver

 

 

OSHO

Occupation Safety and Health Ordinance

 

 

PFC

Public Filling Committee

PME

Powered Mechanical Equipment

ProPECC

Practice Note for Professional Persons

 

 

QA/QC

Quality Assurance/ Quality Control

 

 

RAP

Remediation Action Plan

RR

Remediation Report

RSE

Registered Structural Engineers

RTCM

Radio Technical Commission for Maritime

 

 

SI

Site Investigation

South Works

The Project

SS

Suspended Solids

 

 

TM-DSS

Technical Memorandum on Standards for Effluents discharged into Drainage and Sewerage Systems

TSP

Total Suspended Particulates

 

 

USEPA

HVS method

 

 

WHO

World Health Organization

WPCO

Water Pollution Control Ordinance

WMP

Waste Management Plan

WSD

Water Supplies Department

WTW       

Water Treatment Works


1.             INTRODUCTION

 

Project Description

 

1.1          The Sha Tin Water Treatment Works (WTW) was first commissioned in 1964. At that time, it comprised the current South Works and the Administration Building with a treatment capacity of 364,000 m3/day.  To cope with the rapid increase in the territoryíŽs water demand, the Sha Tin WTW underwent three stages of expansion in 1973, 1976 and 1983 that are collectively called the North Works.  The Sha Tin WTW is the largest WTW in Hong Kong with a treatment capacity of 1,227,000 m3/day

1.2          The present operation of Sha Tin WTW can only maintain about 1,060,000 m3/day average output, due to the aging of plant and equipment after more than 40 years of service.  The plant therefore requires major renovation or replacement.

1.3          In addition, since the plant was first commissioned in 1964, the required treated water quality requirements have also been raised to meet the latest standards.  The existing treated water quality standards as specified by the Water Supplies Department (WSD),  the authority in Hong Kong, is based on the World Health Organization (WHO)íŽs Guidelines for Drinking-water Quality 2008, supplemented by an additional 10 parameters not included in the Guidelines.

1.4          In order to mitigate the risk of reduction in the supply quantity during reprovisioning of the South Works of the Sha Tin WTW, and also to achieve a more reliable and balanced territory-wide water supply system after the reprovisioning works, this Project only covers the reprovisioning of the South Works, the most aging part of the plant while maintaining the North Works in continuous operation.  In addition, WSD would first increase the treatment capacity of Tai Po WTW from 250,000 m3/day to a treatment capacity of 400,000 m3/day (this uprating work forms part of a separate project) and then 800,000 m3/day in two stages to tie in with the staged demolition of some of the facilities in the South Works to allow the in-situ reprovisioning of Sha Tin WTW - South Works (hereinafter referred as the Project) to proceed.  Location of the Project works is shown in Figure 1. The reprovisioned capacity of the South Works will be increased from the original of 364,000 m3/day to 550,000 m3/day.

1.5          The Project comprises the following key elements:

(i)    Demolition of the existing facilities of the South Works and common facilities for both the South Works and the North Works in phases;

(ii)    Reprovisioning of the South Works; and

(iii)   Construction of new common facilities for both the South Works and the North Works.

1.6          The construction works of the Project are anticipated to commence on site in 2015, with completion of the Project by 2021.  A construction programme is presented in Appendix A for reference. 

Purpose of the Manual

1.7          The purpose of this Environmental Monitoring and Audit (EM&A) Manual is to guide the set-up of an EM&A programme to check on compliance with the Environmental Impact Assessment (EIA) study recommendations of the Project, to assess the effectiveness of the recommended mitigation measures, and to identify any further need for additional mitigation measures or remedial actions.

 

1.8          This EM&A Manual aims to provide systematic procedures for monitoring, auditing and minimizing environmental impacts associated with the activities of the Project. It outlines the monitoring and audit programme for the Project.

 

1.9          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 Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM).

 

1.10        This Manual contains the following information:

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

Ÿ   Project organisation for the Project;

Ÿ   Requirements with respect to the construction programme schedule and the necessary environmental monitoring and audit programme to track the varying environmental impact;

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

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

Ÿ   Definition of Action and Limit levels;

Ÿ   Establishment of Event and Action plans;

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

Ÿ   Requirements for presentation of environmental monitoring and audit data and appropriate reporting procedures; and

Ÿ   Requirements for reviewing the EIA predictions and the effectiveness of the mitigation measures / environmental management systems and the EM&A programme.

1.11        This EM&A Manual is a dynamic document that should be reviewed regularly and updated as necessary during the construction and operation of the Project.

Project Organisation

1.12        The roles and responsibilities of the various parties involved in the EM&A process and the organisational structure of the organisations 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 Figure 2.

Engineer or EngineeríŽs Representative (ER)

1.13        The Engineer is responsible for overseeing the construction works and for 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:

Ÿ   Supervise the ContractoríŽs activities and ensure that the requirements in the EM&A Manual are fully complied with;

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

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

Ÿ   Adhere to the procedures for carrying out complaint investigations.

 

The Contractor

 

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

Ÿ   Implement the EIA recommendations and requirements;

Ÿ   Provide assistance to the ET in carrying out relevant environmental monitoring;

Ÿ   Submit proposals on mitigation measures in case of exceedances of Action and Limit levels, in accordance with the Event and Action Plans;

Ÿ   Implement measures to reduce environmental impacts where Action and Limit levels are exceeded until the events are resolved; and

Ÿ   Adhere to the procedures for carrying out environmental complaint investigation in accordance with Section 11 of this Manual.

 

Environmental Team (ET)   

 

1.15        The ET should conduct the EM&A programme and ensure the ContractoríŽs compliance with the ProjectíŽs environmental performance requirements during construction.  The ET should be an independent party from the Contractor. 

 

1.16        The ET should be led and managed by the ET leader.  The ET leader should possess at least 7 years of experience in EM&A.  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:

Ÿ   Monitor the various environmental parameters as required in the EM&A Manual;

Ÿ   Carry out site inspections to investigate and audit the ContractoríŽs site practice, equipment and work methodologies with respect to pollution control and environmental mitigation, and anticipate environmental issues for proactive and practicable action before problems arise;

Ÿ   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 IEC, and the ER;

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

Ÿ   Prepare reports on the environmental monitoring data and the site environmental conditions;

Ÿ   Review the proposals of remedial measure from the Contractor in the case of exceedances of Action and Limit levels, in accordance with the Event and Action Plans;

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

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

Ÿ   Adhere to the procedures for carrying out environmental complaint investigation in accordance with Section 11 of this Manual.

 

Independent Environmental Checker (IEC)

 

1.17        The IEC should advise the ER on environmental issues related to the Project. The IEC should possess at least 7 years of experience in EM&A.  The duties and responsibilities of the IEC are:

Ÿ   Review and audit in an independent, objective and professional manner in all aspects of the EM&A programme;

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

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

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

Ÿ   On as-needed basis, verify and certify the environmental acceptability of the Environmental Permit (EP) holderíŽs construction methodology, relevant design plans and submissions under the EP;

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

Ÿ   Conduct random site inspection;

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

Ÿ   Verify EM&A report that has been certified by the ET leader; and

Ÿ   Provide feedback on the audit results to the ET or the EP holder according to Event and Action Plans in the EM&A Manual.

 

Structure of the EM&A Manual

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

Ÿ   Section 2 íV Sets out EM&A requirement for air quality;

Ÿ   Section 3 íV Sets out EM&A requirement for noise;

Ÿ   Section 4 íV Details auditing requirement for water quality;

Ÿ   Section 5 íV Sets out EM&A requirement for waste management;

Ÿ   Section 6 íV Details auditing requirement for terrestrial ecology;

Ÿ   Section 7 íV Details auditing requirement for landscape and visual;

Ÿ   Section 8 íV Details auditing requirement for cultural heritage;

Ÿ   Section 9 íV Details auditing requirement for land contamination;

Ÿ   Section 10 íV Details auditing requirement for hazard to life;

Ÿ   Section 11 íV Describes scope and frequency of environmental site audits and sets out the general requirements of the EM&A programme; and

Ÿ   Section 12íV Details the EM&A reporting requirements


2.              Air Quality

 

Introduction

2.1            Potential air quality impact arising from the construction works would mainly be related to dusty construction activities include excavation works, truck haulage, demolition and wind erosions.  In order to check compliance with legislative requirements, monitoring should be conducted during the construction phase. Total Suspended Particulates (TSP) monitoring and site audits are recommended to confirm that the proposed mitigation measures are properly implemented.

2.2            In this section, the requirements, methodology, equipment, monitoring locations and criteria for the monitoring and audit of construction dust impact during the construction phase of the Project are presented.

Monitoring Parameters and Equipment

2.3            The major construction activities of the Project would likely be demolition and construction of superstructure.  Demolishing and constructing reinforced concrete structure would generate insignificant amount of small size particulates, hence, no significant RSP or FSP impacts would be anticipated.  Monitoring of 24-hour Respirable Suspended Particulates (RSP) and 24-hour Fine Suspended Particulates (FSP) levels are not proposed.  Therefore, only 1-hour Total Suspended Particulates (TSP) is recommended to be monitored and audited at the proposed monitoring locations.

2.4            1-hour TSP levels should be measured to indicate the impacts of construction dust on air quality.  The TSP levels should be measured by following the standard method as set out in High Volume Sampling Method for Total Suspended Particulates, Part 50 Chapter 1 Appendix B, Title 40 of the Code of Federal Regulations of the USEPA (hereinafter referred to as ížHVS methodíĘ).  Upon approval of EPD and IEC, an alternative sampling method of using direct reading methods which are capable of producing comparable results as that by the high volume sampling method can be used to indicate short event impacts.

2.5            All relevant data including temperature, pressure, weather conditions, elapsed-time meter reading for the start and stop of sampler, identification and weight of the filter paper, and other special phenomena and work progress of the concerned site, etc, should be recorded down in detail.  A sample data sheet is shown in Appendix B1.

2.6            HVS in compliance with the following specifications should be used for carrying out the 1-hour monitoring:

(i)         0.6 - 1.7 m3 per minute (20 - 60 standard cubic feet per minute) adjustable flow range;

(ii)        equipped with a timing / control device with íË 5 minutes accuracy for 24 hours operation;

(iii)       installed with elapsed-time meter with íË 2 minutes accuracy for 24 hours operation;

(iv)      capable of providing a minimum exposed area of 406 cm2 (63 in2);

(v)       flow control accuracy:  íË 2.5% deviation over 24-hour sampling period;

(vi)      incorporated with an electronic mass flow rate controller or other equivalent devices;

(vii)     equipped with a shelter to protect the filter and sampler;

(viii)    equipped with a flow recorder for continuous monitoring;

(ix)      provided with a peaked roof inlet;

(x)       incorporated with a manometer;

(xi)      able to hold and seal the filter paper to the sampler housing at horizontal position;

(xii)     easy to change the filter; and

(xiii)    capable of operating continuously for 24-hour period.

2.7            The ET is responsible for the provision of the monitoring equipment and should provide sufficient number of samplers with an appropriate calibration kit for carrying out the baseline monitoring, regular impacts monitoring and ad-hoc monitoring.  The samplers should be equipped with an electronic mass flow controller and be calibrated against a traceable standard at regular intervals, in accordance with requirements stated in the manufacturers operating manual and as described below.  All the equipment, calibration kit, filter papers, etc, should be clearly labelled. If direct reading dust meters is proposed to be used, the ET Leader should submit sufficient information to the IEC to prove that the instrument is capable of achieving a comparable result as that the HVS and may be used for the 1-hour sampling.  The instrument should also be calibrated regularly.

2.8            Initial calibration of dust monitoring equipment should be conducted upon installation and thereafter every six months. The transfer standard shall be traceable to the internationally recognized primary standard and be calibrated annually. The calibration data should be properly documented for future reference by the IEC.

2.9            The flow-rate of the sampler before and after the sampling exercise with the filter in position should be verified to be constant and be recorded on the data sheet as shown in Appendix B1.

2.10          If the ET Leader proposes to use a direct reading dust meter to measure 1-hour TSP levels, he shall submit sufficient information to the IEC to prove that the instrument is capable of achieving a comparable result as that the HVS and may be used for the 1-hour sampling. The instrument shall also be calibrated regularly, and the 1-hour sampling shall be determined periodically by HVS to check the validity and accuracy of the results measured by direct reading method.

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

a)         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;

b)        the wind data shall be captured by a data logger. The data recorded in the data logger shall be downloaded periodically for analysis at least once a month;

c)         the wind data monitoring equipment shall be re-calibrated at least once every six months; and

d)        wind direction shall be divided into 16 sectors of 22.5 degrees each.

2.12          If the ET Leader proposes alternative dust monitoring equipment / methodology (e.g. direct reading methods) after the approval of this Manual, agreement from the IEC should be sought. The instrument should also be calibrated regularly following the requirements specified by the equipment manufacturers. 

Laboratory Measurement / Analysis

2.13          A clean laboratory with constant temperature and humidity control, and equipped with necessary measuring and conditioning instruments, to handle the dust samples collected, shall be available for sample analysis, and equipment calibration and maintenance. The laboratory shall be HOKLAS accredited or other internationally accredited laboratory.

2.14          If a site laboratory is set up or a non-HOKLAS accredited laboratory is hired for carrying out the laboratory analysis, the laboratory equipment shall be approved by the ER in consultation with the IEC. Measurement performed by the laboratory shall be demonstrated to the satisfaction of the ER and the IEC. IEC shall conduct regular audit to the measurement performed by the laboratory to ensure the accuracy of measurement results. The ET Leader shall provide the ER with one copy of the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B for his reference.

2.15          Filter paper of size 8"x10" shall be labelled before sampling. It shall be a clean filter paper with no pin holes, and shall be conditioned in a humidity controlled chamber for over 24-hour and be pre-weighed before use for the sampling.

2.16          After sampling, the filter paper loaded with dust shall be kept in a clean and tightly sealed plastic bag. The filter paper is then returned to the laboratory for reconditioning in the humidity controlled chamber followed by accurate weighing by an electronic balance with a readout down to 0.1 mg. The balance shall be regularly calibrated against a traceable standard.

2.17           All the collected samples shall be kept in a good condition for 6 months before disposal.

Dust Monitoring Stations

2.18          The worst potentially affected locations in the vicinity of the construction activities of the Project identified for dust monitoring are listed in Table 2.1 and shown in Figure 3.

 

Table 2.1      Proposed Dust Monitoring Stations

Identification No.

Air Sensitive Receiver (ASR)

ID in EIA Report

Proposed Dust Monitoring Stations  

AM1

ASR-2

The L Louey

AM2

ASR-4

Hin Keng Estate-
Hin Wan House

 

2.19          The status and locations of air quality sensitive receivers may change after this Manual is issued. In such case, the ET should propose alternative monitoring stations and seek agreement from the IEC and EPD.

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

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

(ii)       Monitoring as close as possible to the ASRs as defined in the EIAO-TM; and

(iii)      Assurance of minimal disturbance to the occupants and working under a safe condition during monitoring.

2.21          When positioning the HVSs, the following points should be noted:

(i)        A horizontal platform with appropriate support to secure the samplers against gusty wind should be provided;

(ii)       Two samplers should not be placed less than 2 m apart;

(iii)      The distance between the sampler and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the sampler;

(iv)     A minimum of 2 m separation from walls, parapets and penthouses is required for rooftops samplers;

(v)      A minimum of 2 m separation from any supporting structure, measures horizontally is required;

(vi)     No furnace or incinerator flue is located nearby the samplers;

(vii)    Airflow around the sampler is unrestricted;

(viii)   The sampler is more than 20 m from the dripline;

(ix)     Any wire fence and gate to protect the sampler, should not cause any obstruction during monitoring;

(x)      Permission must be obtained to set up the samplers and to obtain access to the monitoring stations; and

(xi)     A secured supply of electricity is needed to operate the samplers.

 

2.22          In case the baseline monitoring cannot be carried out at the designated monitoring locations during the baseline monitoring period, the ET Leader shall carry out the monitoring at alternative locations which can effectively represent the baseline conditions at the impact monitoring locations. The alternative baseline monitoring locations shall be approved by the ER and agreed with the IEC.

2.23          In exceptional cases, when insufficient baseline monitoring data or questionable results are obtained, the ET Leader shall liaise with the IEC and EPD to agree on an appropriate set of data to be used as a baseline reference and submit to ER for approval.

Baseline Monitoring

2.24          Baseline monitoring should be carried out to determine the ambient 1-hour TSP levels at the monitoring locations prior to the commencement of the Project works. Before commencing the baseline monitoring, the ET should inform the IEC of the baseline monitoring programme such that the IEC can conduct on-site audit to ensure accuracy of the baseline monitoring results. 

2.25          TSP baseline monitoring should be carried out for a continuous period of at least two weeks. 1-hour TSP sampling shall be done at least three times per day at each monitoring station when the highest dust impacts are expected.  During the baseline monitoring, there should not be any construction or dust generating activities in the vicinity of the monitoring stations. General meteorological conditions (wind speed, direction and precipitation) and notes regarding any significant adjacent dust producing sources should also be recorded throughout the baseline monitoring period.  A summary of baseline monitoring is presented in Table 2.2.

2.26          The baseline monitoring will provide data for the determination of the appropriate Action levels whilst the Limit levels will be set against statutory or otherwise agreed limits.

2.27          If the ET Leader considers that significant changes in the ambient conditions have arisen, a repeat of the baseline monitoring may be carried out to update the baseline levels and air quality criteria, after consultation and agreement with the ER, the IEC and the EPD.  

Impact Monitoring

2.28          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. 

2.29          For 1-hour TSP monitoring, the sampling frequency of at least three times in every six-days should be undertaken when the highest dust impact occurs. In case of non-compliance with the air criteria, more frequent monitoring, as specified in the Action Plan in the following section, should be conducted. This additional monitoring should be continued until the excessive dust emission or the deterioration in the air quality is rectified. The impact monitoring programme is summarised in Table 2.2.

Table 2.2      Summary of Construction Dust Monitoring Programme

Monitoring Period

Duration

Sampling Parameter

Frequency

Baseline Monitoring

Consecutive days of at least 2 weeks before commencement of major construction works

1-hour TSP

3 times per day

Impact Monitoring

Throughout the construction phase

1-hour TSP

3 times in every 6 days when documented and valid complaint was received

 

2.30          Before commencement of the monitoring, the ET should inform the IEC of the impact monitoring programme such that the IEC can conduct an on-site audit to ensure the accuracy of the impact monitoring results.

Compliance Assessment

2.31        Action and Limit (A/L) levels that provide an appropriate framework for the interpretation of monitoring results.  The air quality monitoring data should be checked against the recommended A/L levels as listed in Table 2.3.

Table 2.3      Proposed Action and Limit Levels for Impact Monitoring

Parameter

Action Level (1)

Limit Level

1-hour TSP 

íP         For BL £ 384úgg m-3, AL = (BL * 1.3 + LL)/2

íP        ForBL > 384úgg m-3, AL = LL

500 úgg m-3

(1) BL = Baseline level, AL = Action level, LL = Limit level.


Event and Action Plan

2.32        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 occurs, the ET, the IEC, the ER and the Contractor should strictly observe the relevant actions of the respective Event and Action Plan in Table 2.4.

Mitigation Measures

2.33         Site-specific dust mitigation measures recommended in the EIA Report include 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.


Table 2.4      Event and Action Plan for Construction Dust Monitoring

EVENT

ACTION

 

ET

IEC

ER

CONTRACTOR

 

ACTION LEVEL

 

 

1.  Exceedance for one sample

 

1.   Inform the Contractor, IEC and ER;

2.   Discuss with the Contractor on the remedial measures required;

3.   Repeat measurement to confirm findings; and

4.   Increase monitoring frequency. 

 

1.   Check monitoring data submitted by the ET;

2.   Check ContractoríŽs working method; and

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

 

1.     Confirm receipt of notification of exceedance in writing.

 

1.  Identify source(s), investigate the causes of exceedance and propose remedial measures;

2.   Implement remedial measures; and

3.   Amend working methods agreed with the ER as appropriate.

 

 

2.  Exceedance for two or more consecutive samples

 

1.   Inform the Contractor, IEC and ER;

2.   Discuss with the ER and Contractor on the remedial measures required;

3.   Repeat measurements to confirm findings;

4.   Increase monitoring frequency to daily;

5.   If exceedance continues, arrange meeting with the IEC, ER and Contractor; and

6.   If exceedance stops, cease additional monitoring.

 

1.   Check monitoring data submitted by the ET;

2.   Check ContractoríŽs working method; and

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

 

 

1.    Confirm receipt of notification of exceedance in writing;

2.    Review and agree on the remedial measures proposed by the Contractor; and

3.    Supervise implementation of remedial measures.

 

 

1.  Identify source and investigate the causes of exceedance;

2.  Submit proposals for remedial measures to the ER with a copy to ET and IEC within three working days of notification;

3.  Implement the agreed proposals; and

4.  Amend proposal as appropriate.

 

LIMIT LEVEL

 

 

 

LIMIT LEVEL

 

1.  Exceedance for one sample

 

1.  Inform the Contractor, IEC, EPD and ER;

2.  Repeat measurement to confirm findings;

3.  Increase monitoring frequency to daily; and

4.  Discuss with the ER, IEC and contractor on the remedial measures and assess the effectiveness.

 

1.   Check monitoring data submitted by the ET;

2.   Check the ContractoríŽs working method;

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

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

 

 

1.   Confirm receipt of notification of exceedance in writing;

2.   Review and agree on the remedial measures proposed by the Contractor; and

3.   Supervise implementation of remedial measures.

 

1.     Identify source(s) and investigate the causes of exceedance;

2.     Take immediate action to avoid further exceedance;

3.     Submit proposals for remedial measures to ER with a copy to ET and IEC within three working days of notification;

4.     Implement the agreed proposals; and

5.   Amend proposal if appropriate.

 

 

2. Exceedance for two or more consecutive samples

 

1.  Notify Contractor, IEC, EPD and ER;

2.  Repeat measurement to confirm findings;

3.  Increase monitoring frequency to daily;

4.  Carry out analysis of the ContractoríŽs working procedures with the ER to determine possible mitigation to be implemented;

5.  Arrange meeting with the IEC and ER to discuss the remedial measures to be taken;

6.  Review the effectiveness of the ContractoríŽs remedial measures and keep IEC, EPD and ER informed of the results; and

7.  If exceedance stops, cease additional monitoring.

 

1.   Check monitoring data submitted by the ET;

2.   Check the ContractoríŽs working method;

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

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

 

 

1.    Confirm receipt of notification of exceedance in writing;

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

3.    Supervise the implementation of remedial measures; and

4.    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.  Identify source(s) and investigate the causes of exceedance;

2.  Take immediate action to avoid further exceedance;

3.  Submit proposals for remedial measures to the ER with a copy to the IEC and ET within three working days of notification;

4.  Implement the agreed proposals;

5.  Revise and resubmit proposals if problem still not under control; and

6.  Stop the relevant portion of works as determined by the ER until the exceedance is abated.

 


3.             Noise

Introduction

3.1          In this section, the requirements, methodology, equipment, monitoring locations, and protocols for the monitoring and audit of noise impacts during the construction phase of the Project are presented. Operation noise monitoring is considered not necessary as no adverse impact is expected with the implementation of the recommended noise mitigation measures.

Construction Noise

Noise Parameters 

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

 

3.3          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 B2 for reference.

Monitoring Equipment and Methodology

 

3.4          As referred to the requirements of the Technical Memorandum (TM) issued under the 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 may be accepted as valid only if the difference between calibration levels obtained before and after the noise measurement is less than 1.0 dB.

 

3.5          Noise measurements should not be made in the presence of fog, rain, wind with a steady speed exceeding 5ms-1 or wind with gusts exceeding 10ms-1. The wind speed should be checked with a portable wind speed meter capable of measuring wind speeds in ms-1.

 

3.6          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, regular impact monitoring and ad hoc monitoring.  All the equipment and associated instrumentation should be clearly labelled.

Noise Monitoring Stations

3.7          In accordance with the EIA Report, the designated locations for construction noise monitoring are listed in Table 3.1 and shown in Figure 4.

Table 3.1      Proposed Noise Monitoring Stations during Construction Phase

Identification No.

Noise Sensitive Receiver (NSR) ID in EIA Report

Identified Noise Monitoring Stations

NM1

HK2

The L Louey (South)

NM2

HK5

Hin Keng Estate íV Hin Wan House

NM3

HK7

C.U.H.K.F.A.A. Thomas Cheung School

 

3.8          The status and location of noise sensitive receivers (NSRs) may change after approval of this Manual.  In such case, and if changes to the monitoring locations are considered necessary, the ET should propose alternative monitoring stations and seek approval from the ER and agreement from the IEC and EPD on the proposal.  If alternative monitoring stations are proposed, these stations should be chosen based on the following criteria:

Ÿ     Monitoring at NSRs close to the major site activities of the Project that are likely to arise noise impacts;

Ÿ     Monitoring as close as possible to the NSRs as defined in the EIAO-TM; and

Ÿ     Assurance of minimal disturbance to the occupants and working under a safe condition during monitoring.

3.9          The monitoring station should normally be at a point 1m from the exterior of the noise sensitive facade and be at a position 1.2 m above ground.  If there is a problem with access to the normal monitoring position, an alternative position should be chosen, and a correction to the measurement results should be made.  For reference, a correction of +3dB(A) should be made to free-field measurements.  The ET should 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 should be carried out at the same positions.  If changes to the monitoring stations are required upon commencing the baseline monitoring or thereafter, the ET should propose alternative locations based on the above-mentioned critieria and seek approval from the ER and agreement from the IEC and EPD on the proposal.

Baseline Monitoring

3.10        The ET should carry out baseline noise monitoring prior to the commencement of the construction works.  The baseline noise levels should be measured for a continuous period of at least 14 consecutive days at a minimum logging interval of 30 minutes for daytime (between 0700 and 1900 hours of normal weekdays) and 15 minutes (as three consecutive Leq, (5 minutes) readings) for evening time (between 1900 and 2300 hours on normal weekdays), general holidays including Sundays (between 0700 and 2300 hours) and night-time (between 2300 and 0700 on all days). The Leq, L10 and L90 should be recorded at the specified interval.  Before commencing the baseline monitoring, the ET Leader should inform the IEC of the baseline monitoring programme such that the IEC can conduct on-site audit to ensure accuracy of the baseline monitoring results.

3.11        There should not be any construction activities in the vicinity of the monitoring stations during the baseline monitoring.  Any non-project related construction activities in the vicinity of the monitoring stations during the baseline monitoring should be noted and the source and location of such activities should be recorded.

3.12        In exceptional cases, when baseline monitoring data obtained are insufficient or questionable, the ET Leader should liaise with the IEC and EPD to agree on an appropriate set of data to be used as the baseline reference.

Impact Monitoring

3.13        Noise monitoring should be carried out at all the designated monitoring stations when there are Project-related construction activities being undertaken within a radius of 300m 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.

3.14        If a school is located near the construction activities, noise monitoring should be carried out at the monitoring stations for the school during school examination periods. The ET Leader should liaise with the school administration and the Hong Kong Examinations and Assessment Authority to ascertain the exact dates and times of all examinations during the construction phase of the Project.

3.15        In the case of non-compliance with the construction noise criteria, more frequent monitoring, as specified in Event and Action Plan in Table 3.3, should be carried out.  This additional monitoring should be continued until the recorded noise levels show that the non-compliance is rectified or proved to be irrelevant to the Project-related construction activities.

Event and Action Plan

3.16        The Action and Limit levels for construction noise are defined in Table 3.2. Should non-compliance of the noise quality criteria occur, actions in accordance with the Event and Action Plan in Table 3.3 should be taken.

 

 

Table 3.2      Action and Limit Levels for Construction Noise Impact Monitoring

Time Period

Action Level

Limit Level

0700-1900 hours on normal weekdays

When one documented complaint is received

75 dB(A) for residential premises

70 dB(A) for schools during normal teaching periods and

65 dB(A) during examination periods

3.17        To account for cases in which ambient noise levels, as identified by baseline monitoring, approach or exceed the stipulated Limit Levels prior to the commencement of construction, a Maximum Acceptable Impact Level, which incorporates the baseline noise levels and the identified construction noise Limit Level, may be defined and agreed with the EPD. The amended level will be greater than 75 dB(A) and will represent the maximum acceptable noise level at a specific monitoring station. Correction factors for the effects of acoustic screening and/or architectural features of NSRs may also be applied as specified in the Technical Memorandum on Noise from Construction Work other than Percussive Piling (GW-TM).


Table 3.3      Event and Action Plan for Construction Noise Monitoring

EVENT

ACTION

ET

IEC

ER

CONTRACTOR

Action Level

1.   Notify the Contractor, IEC and ER;

2.   Discuss with the ER and Contractor on the remedial measures required; and

3.   Increase monitoring frequency to check mitigation effectiveness.

 

1.   Review the investigation results submitted by the Contractor; and

2.   Review and advise the ET and ER on the effectiveness of the remedial measures proposed by the Contractor.

1.   Confirm receipt of notification of complaint in writing;

2.   Review and agree on the remedial measures proposed by the Contractor; and

3.   Supervise implementation of remedial measures.

1.   Investigate the complaint and propose remedial measures;

2.   Report the results of investigation to the IEC, ET and ER;

3.   Submit noise mitigation proposals to the ER with copy to the IEC and ET  within three working days of notification; and

4.   Implement noise mitigation proposals.

Limit Level

1.  Notify the Contractor, IEC, EPD and ER;

2.  Repeat measurement to confirm findings;

3.  Increase monitoring frequency;

4.  Carry out analysis of ContractoríŽs working procedures to determine possible mitigation to be implemented;

5.  Arrange meeting with the IEC and ER to discuss the remedial measures to be taken;

6.  Review the effectiveness of ContractoríŽs remedial measures and keep IEC, EPD and ER informed of the results; and

7.  If exceedance stops, cease additional monitoring.

1.  Check monitoring data submitted by the ET;

2.  Check the ContractoríŽs working method;

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

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

1.   Confirm receipt of notification of failure in writing;

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

3.   Supervise the implementation of remedial measures; and

4.   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.   Identify source and investigate the causes of exceedance;

2.   Take immediate action to avoid further exceedance;

3.   Submit proposals for remedial measures to the ER with copy to the IEC and ET within three working days of notification;

4.   Implement the agreed proposals;

5.   Revise and resubmit proposals if problem still not under control; and

6.   Stop the relevant portion of works as determined by the ER until the exceedance is abated.


Operation Noise íV Fixed Plant

3.18        The maximum permissible sound power levels of the identified fixed noise sources of the Project were predicted in the EIA Report.  To ensure that the noise impact associated with the fixed plant operations would comply with the noise standards stipulated in the EIAO-TM and Noise Control Ordinance (NCO), the specified sound power levels should be implemented and refined by the Contractor as appropriate.  No specific monitoring for fixed plant operation is deemed necessary.

Mitigation Measures

Construction Phase

3.19        The EIA Report indicates that construction activities would cause noise exceedances at a few NSRs, and therefore, appropriate noise mitigation measures and good site practices are recommended. The Contractor should be responsible for the design and implementation of these measures. The implementation schedule for the recommended mitigation measures is presented in Appendix C.

3.20        In the event of exceedances or complaints, the Contractor should review the effectiveness of these mitigation measures and propose, design and implement alternative or additional measures as appropriate.  The Contractor should liaise with the ET on alternative or additional remedial measures, if appropriate, and the proposal of the measures should be submitted to the ER for approval.  The Contractor should implement the agreed remedial measures properly. 

Operation Phase

3.21        The mitigation measures as recommended in the EIA Report for the fixed plant noise arising from the operation of the Project is presented in Appendix C. 

 


4.             WAter quality

 

Introduction

4.1          As identified in the EIA Report, the key water quality impacts caused by the Project would be associated with the land-based construction activities. To ensure no adverse water quality impact to the nearby water courses due to the discharge of surface runoff and drainage from the works areas, water quality monitoring in the two water courses along the Project boundary is recommended during the construction phase. It is also recommended that regular site inspections should be undertaken to inspect the construction activities and works areas in order to ensure the recommended mitigation measures are properly implemented.

4.2          Adverse water quality impacts associated with the operation of the Project are not expected.  Thus, no water quality monitoring and audit programme is required during the Project operation.

4.3          This section describes the requirement of water quality monitoring during site clearance and foundation works of the Project.

Water Quality Parameters

4.4          Dissolved oxygen (DO), turbidity, suspended solids (SS) level and pH should be monitored at designated water quality monitoring stations in the two water courses. 

4.5          The levels of DO, turbidity and pH should be measured in situ whereas SS should be determined by laboratory analysis.

Monitoring Locations

4.6          The proposed water quality monitoring stations in the two water courses are listed in Table 4.1 and shown in Figure 5.  In each water course, one monitoring station should be set in the water course upstream of the works area as a control station, and one impact monitoring station should be set in the water course downstream of the works area.

4.7          Sampling should be taken at three water depths, namely, 1m below water surface, mid-depth and 1m above river bed, except where the water depth is less than 6m, the mid-depth may be omitted.  Should the water depth be less than 3m, only the mid-depth station will be monitored. The status and locations of water quality monitoring stations and the works activities may change after issuing this Manual. If such cases exist, the ET Leader shall propose with justification for changes to monitoring locations or other requirements of the EM&A programme, and seek approval from the IE(C) and EPD.

Table 4.1      Proposed Water Quality Monitoring Stations

Station

Description

Easting

Northing

C1

Control Stations

835110

824716

C2

835316

824383

C3

835642

824386

M1

Impact Monitoring Stations

835215

824827

M2

835536

824775

 

Baseline Monitoring

4.8          Baseline conditions in the water courses should be established and agreed with EPD prior to the commencement of construction works.  The purpose of the baseline monitoring is to establish ambient conditions prior to the commencement of the works and to demonstrate the suitability of the proposed monitoring stations.  The baseline conditions should normally be established by measuring the water quality parameters specified in Section 4.4.

4.9          The baseline monitoring should be taken at all designated monitoring stations in the two water courses, three days per week, for at least 4 weeks prior to the commencement of construction works. Temporal and spatial variations should be taken into account. There should not be any construction activities in the vicinity of the stations during the baseline monitoring. The interval between 2 sets of monitoring should not be less than 36 hours. Replicate in-situ measures should be carried out in each sampling event.

4.10        Baseline monitoring schedule should be submitted to EPD at least 4 weeks prior to the commencement of baseline monitoring.  EPD should also be notified immediately for any changes in schedule.

4.11        The baseline monitoring report should be submitted to EPD at least 4 weeks before the commencement of the construction works for agreement.  The baseline monitoring report should be certified by the IEC before submission to EPD.

Impact Monitoring

4.12        During the construction phase of the Project, impact monitoring should be undertaken three days per week with sampling / measurement at the designated monitoring stations in the two water courses.  Upon completion of the construction phase, the monitoring exercise at the designated monitoring locations should be continued for four weeks in the same manner as the impact monitoring.  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.

4.13        Replicate in-situ measurements should be carried out in each sampling event.  The monitoring probes should be retrieved out of water after the first measurement and then redeployed for the second measurement.  Where the difference in value between the first and second readings of DO, turbidity or pH is more than 25% of the value of the first reading, the reading should be discarded and further readings should be taken. 

4.14        The water quality monitoring schedule should be submitted to EPD at least 1 week before the first day of the monitoring month.  EPD should be notified immediately of any changes in schedule by fax.  If the monitoring data collected at the designated stations indicate that the Action or Limit Levels as shown in Table 4.3 are exceeded, appropriate actions should be taken in accordance with the Event and Action Plan in Table 4.4.

Site Audits

4.15        Implementation of regular site audits aim to ensure that the recommended mitigation measures are properly undertaken during proposed construction works.  It can also provide an effective control of any malpractices and therefore achieve continual improvement of environmental performance on site.

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

Ÿ  investigate the problems and the causes;

Ÿ  issue action notes to the Contractor who is responsible for the works;

Ÿ  implement remedial and corrective actions immediately;

Ÿ  re-inspect the site conditions upon completion of the remedial and corrective actions; and

Ÿ  record the event and discuss with the Contractor for preventive actions.

 

Field Log

4.17        Other relevant data should also be recorded, such as: monitoring location / position, time, water depth, weather conditions and any special phenomena underway near the monitoring station.  A sample data record sheet is shown in Appendix B3 for reference.

Monitoring Equipment

Dissolved Oxygen and Temperature Measuring Equipment

4.18        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:

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

Ÿ  a temperature of 0 ‑ 45 degree Celsius.

 

Turbidity Measurement Instrument

4.19        The instrument should be a portable and weatherproof turbidity-measuring instrument using a DC power source.  It should have a photoelectric sensor capable of measuring turbidity between 0 - 1000 NTU (for example, Hach model 2100P or an approved similar instrument).

pH Measurement Instrument

4.20        The instrument should consist of a potentiometer, a glass electrode, a reference electrode and a temperature-compensating device.  It should be readable to 0.1pH 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.

Sampler

4.21        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 (for example, Kahlsico Water Sampler or an approved similar instrument).

Water Depth Detector

4.22        A portable, battery-operated echo sounder would be used for the determination of water depth at each designated monitoring station.  If echo sounder is not applicable due to low water depth, various sized stainless steel rules would be used to determine the water depth.

Sample Containers and Storage

4.23        Water samples for SS should be stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4óXC 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 stated in Table 4.2.

Monitoring Position Equipment

4.24        A hand-held or boat-fixed type digital Differential Global Positioning System (DGPS) with way point bearing indication and Radio Technical Commission for maritime (RTCM) Type 16 error message íąscreen pop-upíŽ facilities (for real-time auto-display of error messages and DGPS corrections from the Hong Kong Hydrographic Office), or other equipment instruments of similar accuracy, should be provided and used to ensure that the water sampling locations are correct during the water quality monitoring work.

Calibration of In-Situ Instruments

4.25        The DO meter and turbidimeter should be checked and calibrated before use.  DO meter and turbidimeter should be certified by a laboratory accredited under HOKLAS or any other international accreditation scheme, and subsequently re-calibrated at three monthly intervals throughout all stages of the water quality monitoring.  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 location.

4.26        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

4.27        Analysis of suspended solids (SS) should be carried out in a HOKLAS or other international accredited laboratory.  Sufficient water samples should be collected at the monitoring stations for carrying out the laboratory determinations. The determination work should start within 24 hours after collection of the water samples.  The analyses should follow the American Public Health Association (APHA) Standard Methods for the Examination of Water and Wastewater or an equivalent method subject to the approval of EPD.  Analytical methods and detection limits for SS are present in Table 4.2.

Table 4.2      Analytical Methods to be Applied to Water Quality Samples

Parameters

Analytical Method

Detection Limit

Suspended Solids

APHA 2540D *

1 mg/L

* APHA  American Public Health Association Standard Methods for the Examination of Water and Wastewater

 

4.28        The testing of SS should be HOKLAS accredited (or if not, approved by EPD) and comprehensive quality assurance and control procedures in place in order to ensure quality and consistency in results.

4.29        Detailed testing methods, pre-treatment procedures, instruments use, Quality Assurance / Quality Control (QA/QC) details (such as blank, spike recovery, number of replicate samples per batch, etc.), detection limit and accuracy shall 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 QA/QC shall be in accordance with the requirements of HOKLAS or international accredited scheme.  The QA/QC results shall be reported.  The testing methods and related proposal should be checked and certified by IEC before submission to EPD for approval.

4.30        Additional replicate 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 quality assurance and quality control programmes.  The laboratory should prepare to demonstrate the programme to DEP or his representatives when requested.

Event and Action Plan

4.31        The water quality criteria, namely action and limit levels, are shown in Table 4.3.  These criteria should be applied to ensure that any deterioration of water quality is readily detected and timely action is taken to rectify the situation.  Should the monitoring results of the water quality parameters at any designated monitoring station exceed the water quality criteria, the actions in accordance with the Event and Action Plan summarized in Table 4.4 shall be carried out.

4.32        The ET Leader should assess the potential impacts on the water sensitive receivers based on the monitoring data.  The performance of the environmental management system (i.e. of the overall EM&A programme) should be reviewed by the ET Leader on a quarterly basis.  The findings of this review should be included in the quarterly EM&A summary reports, together with any recommendations to improve the performance of the EM&A  programme.

Table 4.3      Action and Limit Levels for Water Quality

Parameters

Action Level

Limit Level

DO in mg/L

Surface, middle, bottom DO

£ 5 %-ile of baseline data

Surface, middle DO

£ 4 mg/L or 1%-ile of baseline data for surface and middle layer

Bottom DO

£ 2 mg/L or 1%-ile of baseline data for bottom layer

SS in mg/L

Depth-average SS

≥ 95 %-ile of baseline data or 120% of control stationíŽs SS on the same day of measurement

Depth-average SS

≥ 99 %-ile of baseline or 130% of control station's SS on the same day of measurement

Turbidity in NTU

 

Depth-average SS

≥ 95 %-ile of baseline data or 120% of control stationíŽs turbidity on the same day of measurement

Depth-average SS

≥ 99 %-ile of baseline or 130% of control station's turbidity on the same day of measurement

pH

Beyond the range 6.6 to 8.4

Beyond the range of  6.5 to 8.5

Notes:    For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits.

                For pH, action should be taken if the measured pH falls outside the specified range.

 

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

Mitigation Measures

4.34        Mitigation measures for water quality control have been recommended in the EIA Report.  The Contractor should be responsible for the design and implementation of these measures.

4.35        Recommended mitigation measures to minimize the adverse impacts on water quality during the construction activities are listed in the implementation schedule given in Appendix C.

4.36        In the event of complaints or non-compliance / area of improvement being observed, the ET and the Contractor should review the effectiveness of these mitigation measures, design alternative or additional mitigation measures as appropriate and propose to the IEC for approval and implement these alternative or additional measures.

 


Table 4.4      Event and Action Plan for Water Quality

Event

ET Leader

IEC

ER

Contractor

Action level being exceeded by one sampling day

íP      Repeat in situ measurement to confirm findings;

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

íP      Inform IEC and Contractor;

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

íP      Discuss mitigation measures with IEC and Contractor;

íP      Repeat measurement on next day of exceedance.

íP      Discuss with ET and Contractor on the mitigation measures;

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

íP      Assess the effectiveness of the implemented mitigation measures.

íP      Discuss with IEC on the proposed mitigation measures;

íP      Make agreement on the mitigation measures to be implemented.

íP      Assess the effectiveness of the implemented mitigation measures.

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

íP      Rectify unacceptable practice;

íP      Check all plant and equipment;

íP      Consider changes of working methods;

íP      Discuss with ET and IEC and propose mitigation measures to IEC and ER;

íP      Implement the agreed mitigation measures.

Action level being exceeded by more than one consecutive sampling day

íP      Repeat in situ measurement to confirm findings;

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

íP      Inform IEC and Contractor;

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

íP      Discuss mitigation measures with IEC and Contractor;

íP      Ensure mitigation measures are implemented;

íP      Prepare to increase the monitoring frequency to daily;

íP      Repeat measurement on next day of exceedance.

íP      Discuss with ET and Contractor on the mitigation measures;

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

íP      Assess the effectiveness of the implemented mitigation measures.

íP      Discuss with IEC on the proposed mitigation measures;

íP      Make agreement on the mitigation measures to be implemented;

íP      Assess the effectiveness of the implemented mitigation measures.

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

íP      Rectify unacceptable practice;

íP      Check all plant and equipment; Consider changes of working methods;

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

íP      Implement the agreed mitigation measures.

Limit level being exceeded by one sampling day

íP      Repeat in situ measurement to confirm findings;

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

íP      Inform IEC Contractor and EPD;

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

íP      Discuss mitigation measures with IEC, ER and Contractor;

íP      Ensure mitigation measures are implemented;

íP      Increase the monitoring frequency to daily until no exceedance of Limit level.

íP      Discuss with ET and Contractor on the mitigation measures;

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

íP      Assess the effectiveness of the implemented mitigation measures.

íP      Discuss with IEC, ET and Contractor on the proposed mitigation measures;

íP      Request Contractor to critically review the working methods;

íP      Make agreement on the mitigation measures to be implemented;

íP      Assess the effectiveness of the implemented mitigation measures.

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

íP      Rectify unacceptable practice;

íP      Check all plant and equipment;

íP      Consider changes of working methods;

íP      Discuss with ET, IEC and ER and propose mitigation measures to IEC and ER within three working days;

íP      Implement the agreed mitigation measures.

Limit level being exceeded by more than one consecutive sampling day

íP      Repeat in situ measurement to confirm findings;

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

íP      Inform IEC Contractor and EPD;

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

íP      Discuss mitigation measures with IEC, ER and Contractor;

íP      Ensure mitigation measures are implemented;

íP      Increase the monitoring frequency to daily until no exceedance of Limit level for two consecutive days.

íP      Discuss with ET and Contractor on the mitigation measures;

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

íP      Assess the effectiveness of the implemented mitigation measures.

íP      Discuss with IEC, ET and Contractor on the proposed mitigation measures;

íP      Request Contractor to critically review the working methods;

íP      Make agreement on the mitigation measures to be implemented;

íP      Assess the effectiveness of the implemented mitigation measures;

íP      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.

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

íP      Rectify unacceptable practice;

íP      Check all plant and equipment;

íP      Consider changes of working methods;

íP      Discuss with ET, IEC and ER and propose mitigation measures to IEC and ER within three working days;

íP      Implement the agreed mitigation measures;

íP      As directed by the ER, to slow down or to stop all or part of the construction activities.

.

 


5.             waste management implications

 

Introduction

5.1          Construction and Demolition (C&D) materials, general refuse from workforce and chemical waste would be generated during the construction and operation phase. It is the ContractoríŽs responsibility to ensure all the waste arising from the Project is handled, stored and disposed of in accordance with good waste management practices, relevant legislation and waste management guidelines. Provided that the waste is handled, transported and disposed of using approved methods and that the recommended good site practices are strictly followed, adverse environmental impacts would not be expected.

Mitigation Measures

5.2          The mitigation measures recommended in EIA Report should form the basis of the site Waste Management Plan (WMP) to be developed by the Contractor during the construction stage.

5.3          It is recommended that the waste generated during the construction activities should be audited regularly by the ET to determine if waste is being managed in accordance with approved procedures and the site WMP. The audit should look at all aspects of on-site waste management practices including waste generation, storage, recycling, transport and disposal. Apart from site inspection, documents including licences, permits, disposal and recycling records should be reviewed and audited for compliance with the legislation and contract requirements. In addition, the routine site inspections should check the implementation of the recommended good site practices and other waste management mitigation measures. In order to monitor the disposal of C&D material at landfills and public filling areas, as appropriate, and to control fly tipping, a trip-ticket system should be included as one of the contractual requirements to be implemented by an Environmental Team undertaking the Environmental Monitoring and Audit work.

5.4          With the appropriate handling, storage and disposal of waste arising from the construction works as recommended in Appendix C, the potential of adverse environmental impacts would be minimized. During the site inspections, the ET should pay special attention to the issues relating to waste management and check whether the Contractor has implemented the recommended good site practices and mitigation measures.

Audit Requirement

5.5          Regular audits and site inspections should be carried out during construction phase by the ER, ET and Contractor to ensure that the recommended good site practices and the recommended mitigation measures in Appendix C are properly implemented by the Contractor. The audits should concern all aspects of on-site waste management practices including waste generation, storage, recycling, transport and disposal. Apart from site inspection, documents including licences, permits, disposal and recycling records should be reviewed and audited for compliance with the legislation and contract requirements.

5.6          The requirements of the environmental audit programme are set out in Section 11 of this Manual. The audit programme will verify the implementation status and evaluate the effectiveness of the mitigation measures.

 


6.             terrestrial ecology

Introduction

6.1          The EIA report has identified that part of proposed works area would be located within the secondary woodland habitat of high ecological value.  Five flora species of conservation importance were recorded within the works area.  Major ecological impacts anticipated include direct impact on the secondary woodland habitat and the floral species of conservation importance.  Indirect impact such as noise disturbance, construction site runoff etc., would also affect the nearby natural habitat and watercourses.

6.2          Mitigation measures have been recommended to minimize potential direct and indirect impacts to ecological resources.  With the recommended mitigation measures implemented, no unacceptable impact on wildlife is expected from the construction and operation of the Project.  This section describes the requirements for the monitoring and auditing of ecological impacts arising from the Project.

Mitigation Measures

6.3          Mitigation measures for ecological impacts have been recommended in the EIA Report to minimize potential direct and indirect impacts.  The Contractor should be responsible for the design and implementation of these measures. 

6.4          Recommended mitigation measures to minimize the adverse impacts on terrestrial ecology during the construction and operation phases are listed in the implementation schedule given in Appendix C. 

Monitoring and Audit Requirements

Site Audit Requirement

6.5          To minimize the disturbance impact on the natural habitat and wildlife, the implementation of the mitigation measures recommended in Ecological Mitigation Measures section above should be subject to regular site audit.  Site audit should be carried out monthly throughout the construction phase.  In case of non-compliance, the Contractor should be informed to strengthen the proposed measures accordingly. 

Detailed Vegetation Survey

6.6          To minimize the impact to flora species of conservation importance, four flora species (Incense Tree, Ailanthus, Lamb of Tartary, and Hong Kong EagleíŽs Claw) are recommended to be transplanted to the woodland compensation area, where possible.  The abundance and health condition of flora species recorded during the EIA stage may vary in the detailed design stage.  Prior to the commencement of the works being undertaken, a detailed vegetation survey should be conducted, by suitably qualified botanist/ecologist with over 7 years experience, for the works area requiring vegetation clearance.  

6.7          The detailed vegetation survey should cover the following scope:

Ÿ   Confirming and updating the number, location and health condition of the flora species of conservation importance;

Ÿ   Preparing a plan illustrating the location of the affected individuals in accordance to the findings of the vegetation survey;

Ÿ   Identifying the suitable receptor sites within the compensatory woodland area or temporary nursery site;

Ÿ   Recommending an implementation programme and methodology of transplanting; and

Ÿ   Recommending a post-transplantation monitoring and maintenance programme.

6.8          The results of the detailed vegetation survey and post-transplanting monitoring programme should be included in the transplantation proposal with plans for approval prior to transplantation. 

Post-transplantation Monitoring for Flora Species of Conservation Importance

6.9          To review the performance of the transplantation exercise, monitoring of transplanted flora should be conducted after the transplantation.  The monitoring should be conducted at least twice per month during the first year and once per month during the course of planting works of the woodland compensation area.  The parameters to be monitoring should include the health condition and survival rate of the transplanted flora.  Any observations and recommendations should be reported in monthly EM&A reports.

Measures to Bat Roosting Site

6.10        Where Chinese Fan-palm (Livistona chinensis) removal is required, these should be checked by suitably qualified ecologist with over 7 years experience for roosting bats prior to their removal.  If roosting bats are observed, a strategy for passive removal will be agreed with the AFCD and implemented.  This could include undertaking the works just after the bats have left the roost (i.e. dusk).

6.11        The inclusion of Chinese Fan-palm of similar size as the affected plant within the areas of compensatory planting or other suitable areas is recommended to replace affected specimens, and compensate for the impact to roosting opportunities for this bat species.

Measures to Disturbance from Construction Activities

6.12        By adopting the following mitigation measures to minimize the disturbance impacts to terrestrial habitat and associated wildlife arising from the land-based construction activities.

íP    Use of Quiet Mechanical Plant during the construction phase should be adopted wherever possible.

íP    Hoarding or fencing should be erected around the works area boundaries during the construction phase.  The hoarding should screen adjacent habitats from construction phase activities, reduce noise disturbance to these habitats and also to restrict access to habitats adjacent to works areas by site workers. 

íP    Regular spraying of haul roads to minimize impacts of dust deposition on adjacent vegetation and habitats during the construction activities.

Measures to Watercourse

6.13        To minimize the contamination of wastewater discharge, accidental chemical spillage and construction site run-off to the receiving water bodies, mitigation measures such as diverting the site runoff to silt trap facilities before discharging into storm drain, proper waste and dumping management and standard good site practice for land-based construction:

íP    The works areas would be reinstated immediately after completion of works;

íP    Waste skips should be provided to collect general refuse and construction wastes.  The wastes should be disposed of in a timely and appropriate manner;

íP    Drainage arrangements should include sediment traps to collect and control construction run-off;

íP    Open burning on works sites is illegal, and should be strictly prohibited; and

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

Monitoring on Woodland Compensation

6.14        Compensatory habitat would be created within the works area, at the plantation south of the nearby Sha Tin South Freshwater Service Reservoir, and at the wasteland north of the Sha Tin West Freshwater Service Reservoir, to compensate for the affected woodland habitat.  The condition of this compensatory habitat should be monitored. 

6.15        The specifications for the standard practices of inspection and establishment works shall follow the General Specification for Civil Engineering Works (2006) Section 3 íV Landscape Softworks and Establishment Works.  Inspection of planting works should be conducted bi-weekly by the landscape contractors to determine the necessity of any maintenance and establishment works.

6.16        In addition, an ecological monitoring programme covering at least 6 years is recommended to review the establishment of the vegetation.  The monitoring frequency should be at least bimonthly during the first year of the planting stage, and can be reduced to quarterly from the second year.  Parameters, such as health condition and survival rate of the plant, presence of weedy plant, should be monitored.  The implementation details of the monitoring programme should be described in Woodland Compensation Plan (WCP) prepared by a suitably qualified botanist/ecologist with over 7 years experience.  The WCP should be circulated to and approved by relevant departments prior to the construction. The need and requirements of monitoring should be reviewed after the completion of the monitoring programme.

 


7.             Landsape and visual

Introduction

7.1          The EIA has recommended landscape and visual mitigation measures to be undertaken during both the construction and operational phases of the Project.  The design, implementation and maintenance of landscape mitigation measures should be checked to ensure that any potential conflicts between the proposed landscape measures and any other works of the project would be resolved as early as practical without affecting the implementation of the mitigation measures.

Mitigation Measures

7.2          The proposed mitigation measures of landscape and visual impacts are summarised in the Implementation Schedule of Mitigation Measures in Appendix C. The landscape and visual mitigation measures proposed should be incorporated in the detailed landscape and engineering design. The construction phase mitigation measures should be adopted from the commencement of construction and should be in place throughout the entire construction period. Mitigation measures for the operational phase should be adopted during the detailed design and be built as part of the construction works so that they are in place on commissioning of the Project.

7.3          The landscape and visual mitigation measures are elaborated in Tables 7.1 and 7.2.

Table 7.1      Proposed Landscape and Visual Mitigation Measures for Construction Phase

ID No.

Landscape and Visual Mitigation Measures

Funding Agency

Implementation Agency

CM1

Trees unavoidably affected by the works shall be transplanted as far as possible in accordance with DEVB TCW No. 10/2013 íV Tree Preservation.

WSD

WSD

CM2

Compensatory Planting shall be provided in accordance with DEVB TCW No. 10/2013 íV Tree Preservation.

WSD

WSD

CM3

Control of night-time lighting glare

WSD

WSD

CM4

Erection of decorative screen hoarding compatible with the surrounding setting.

WSD

WSD

CM5

Management of facilities on work sites which give control on the height and disposition/arrangement of all facilities on the works site to minimize visual impact to adjacent VSRs.

WSD

WSD

 

Table 7.2      Proposed Landscape and Visual Mitigation Measures for Operation Phase

ID No.

Landscape and Visual Mitigation Measures

Funding Agency

Implementation Agency

Maintenance/ Management Agency

OM1

Aesthetically pleasing design as regard to the form, material and finishes shall be incorporated to proposed permanent above ground structures of the project so as to blend in the structures to the adjacent landscape and visual context. 

WSD

WSD

 WSD

OM2

Buffer Tree and Shrub Planting to screen the proposed structures. 

WSD

WSD

WSD

OM3

Landscape Enhancement of affected area with amenity planting where practical. 

WSD

WSD

WSD

OM4

Vertical Greening shall be incorporated to soften the proposed structures where practical.   

WSD

WSD

WSD

OM5

Green Roof shall be proposed to enhance the landscape quality of the structures and mitigate any potential visual impact on adjacent VSRs.

WSD

WSD

WSD

OM6

Landscape Treatments on slope to enhance the landscape and visual amenity value of the proposed man made slopes. 

WSD

WSD

WSD

OM7

Woodland mix planting (within the site and off-site)

WSD

WSD

WSD

 

7.4          The following good site practice measure will also be incorporated in the construction phase of the project:

íP               Topsoil, where identified, shall be stripped and stored for re-use in the construction of the soft landscape works.

Audit Requirement

7.5          Site audits should be undertaken during the construction phase of the Project to check that the proposed landscape and visual mitigation measures are properly implemented and maintained as per their intended objectives.  Site audits should be undertaken by the ET at least once every two weeks during the construction period.  The audits shall concern tree preservation, transplanting, compensation, night-time glare control, management of work sites facilities and the implementation of permanent landscape works in accordance with the proposed mitigation measures in the Landscape Master Plan.

7.6          In the event of non-compliance, the responsibilities of the relevant parties are detailed in the Event/Action plan provided in Table 7.3.

 


Table 7.3      Event / Action Plan for Landscape and Visual during Construction Stage

Action Level

ET

IEC

ER

Contractor

Non-conformity on one occasion

1. Inform the Contractor, the IEC and the ER

2. Discuss remedial actions with the IEC, the ER and the Contractor

3. Monitor remedial actions until rectification has been completed

1. Check inspection report

2. Check the Contractor's working method

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

4. Advise the ER on effectiveness of proposed remedial measures.

 

1. Confirm receipt of notification of non-conformity in writing

2. Review and agree on the remedial measures proposed by the Contractor

3. Supervise implementation of remedial measures

1. Identify Source and investigate the non-conformity

2. Implement remedial measures

3. Amend working methods agreed with the ER as appropriate

4. Rectify damage and undertake any necessary replacement

Repeated Non-conformity

1. Identify source

2. Inform the Contractor, the IEC and the ER

3. Increase inspection frequency

4. Discuss remedial actions with the IEC, the ER and the Contractor

5. Monitor remedial actions until rectification has been completed

6. If non-conformity stops, cease additional monitoring

1. Check inspection report

2. Check the Contractor's working method

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

4. Advise the ER on effectiveness of proposed remedial measures

 

1. Notify the Contractor

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

3. Supervise implementation of remedial measures.

1. Identify Source and investigate the non-conformity

2. Implement remedial measures

3.  Amend working methods agreed with the ER as appropriate

4. Rectify damage and undertake any necessary replacement.   Stop relevant portion of works as determined by the ER until the non-conformity is abated.

Note: 

ET íV         Environmental Team

IEC íV        Independent Environmental Checker

ER íV         EngineeríŽs Representative

 


8.             Cultural heritage

Introduction

8.1          Cultural heritage resources within the Study Area have been identified and reviewed through site visits and literature review.  Based on the baseline review, there lacks archaeological potential within the Study Area.

8.2          Considering sufficient buffer distances between built heritage resources and the proposed works areas, together with appropriate mitigation measures, there would be insignificant visual and vibration impact during construction and operation phases.

Mitigation Measures

8.3          Mitigation measures for cultural heritage impacts have been recommended in the EIA report. Recommended mitigation measures to minimize the adverse impacts on cultural heritage during the construction and operation phases are listed in the implementation schedule given in Appendix C.

Construction Phase

Terrestrial Archaeology

8.4          No specific EM&A requirements would be required during construction phase.

Built Heritage

8.5          Given the considerable separation distance (approximately 270m) between the three graded historic buildings at Hin Tin village and the Works Area, there would be neither adverse vibration nor visual impacts on the Hin Tin village built heritages, and thus no specific EM&A requirements would be required.

8.6          Given that distance between the Ex KCR Beacon Hill Tunnel and the proposed new administration building in about 120m vibration impact is anticipated to be insignificant.  However, as a precautionary measure, a peak particle velocity limit of 7.5mm/s is recommended, including measuring at the facade wall of tunnel portal and inside the tunnel where it is closest to any construction works during the piling and drilling works. Measurements should be made by properly calibrated device and under the supervision of the Registered Structural Engineers (RSE) or his representatives.

Audit Requirement

8.7          The project proponent should ensure that vibration levels are controlled to appropriate levels.  The vibration monitoring should be carried out by the contractor at the facade wall of tunnel portal, as well as inside the tunnel where it is closest to any construction works during the piling and drilling works.

Operation Phase

8.8          No specific EM&A requirements would be required during operation phase.

 

 


9.             land contamination

Introduction

9.1          The land contamination assessment has examined the potential contaminating land uses within the Project area and investigated the potential impacts of the contamination on future use. Due to current land use and site constraints, site investigation (SI) works could not be conducted during the course of the EIA study. SI works would therefore be conducted before construction commences in order to identify any contaminants that may pose hazardous risks or cause adverse effects to the future uses.

Mitigation Measures

9.2          Mitigation measures for land contamination have been recommended in the EIA report. The Contractor should be responsible for the design and implementation of these measures. The implementation schedule of the recommended land contamination mitigation measures is presented in Appendix C.

Monitoring and Audit Requirements

9.3          SI works should be conducted upon decommissioning and prior to the commencement of construction works at the potentially contaminated hotspots according to the Contamination Assessment Plan (CAP). Further site inspection should be carried out before conducting SI to confirm the latest site conditions and verify the applicability of the CAP. If there are any changes in site conditions, a revised CAP detailing the revised sampling and testing plan should be submitted to EPD for endorsement.

9.4          After SI, Contamination Assessment Report (CAR) and if contamination is found, Remediation Action Plan (RAP) should be prepared and submitted to EPD for endorsement. A Remediation Report (RR) should be prepared and submitted to EPD to demonstrate that the decontamination work is adequate and is carried out in accordance with the endorsed CAR and RAP.  No construction works should be carried out prior to the completion of remediation.


10.          hazard to life

Introduction

10.1        A Hazard Assessment of the risks associated with the storage, handling and transport of chlorine at Sha Tin WTW and the off-site transport of chlorine within the Consultation Zone for the Construction and Operational Phases of the reprovisioning project has been conducted in this EIA.

10.2        This In-situ Reprovisioning of Sha Tin WTW is an improvement project, following its completion the chlorine-related risks levels to the general public will be lowered due to the anticipated reduction of the chlorine storage and usage levels.

10.3        Impact of chlorine could be reduced with the recommended practicable mitigation/safety measures for hazard to life in the EIA Report which are presented below.

Mitigation and Good Practice Measures

10.4        A number of good practice measures mitigating hazard to life of the Project construction workers have been listed in Table 12.22 of the EIA Report. The measures recommended for implementation include provision of chlorine gas detectors in the works areas, establishing emergency response and evacuation plans and a number of specific recommendations related mainly to the safe organization of reprovisioning works.

10.5        Similarly, a number of short term and long term measures mitigating the hazards related to off-site transport of chlorine have been recommended which are listed in Table 12.38 of the EIA Report.

10.6        No hazard to life mitigation measures related to the potential on-site chlorine releases have been recommended for the Operational Phase of the Project.

10.7        Implementation Schedule of all these measures is provided in Appendix C.

Audit Requirements

10.8        Implementation of the recommended mitigation measures would be regularly audited. No specific Environmental Monitoring would be required.

 


11.          environmental auditing

 

Site Inspection

 

11.1         Site inspection is one of the most effective tools to enforce the environmental protection requirements at the works area by providing a direct mean to trigger and enforce specified environmental protection and pollution control measures.  Site inspection should be undertaken regularly during the construction phase to ensure that appropriate environmental protection and pollution control mitigation measures are properly implemented for the activities associated with the Project.

 

11.2         The ET Leader should be responsible for formulating the environmental site inspection programme as well as the deficiency and remedial action reporting system, and for carrying out the site inspections.  The proposal for rectification, if any, should be prepared and submitted to the ET Leader and IEC by the Contractor.

 

11.3         Regular site inspections should be carried out and led by the ER and attended by the Contractor and ET at least once per week during the construction phase. The areas of inspection should not be limited to the environmental conditions and the pollution control and mitigation measures within the works area, it should also review the environmental conditions of locations that are beyond the boundary of the works area but are likely to be affected directly or indirectly by the construction site activities of the Project.  During the inspection, the following information should be referred to:

 

í▒   The EIA Report and EM&A recommendations on environmental protection and pollution control mitigation measures;

í▒   Ongoing results of the EM&A programme;

í▒   Works progress and programme;

í▒   Individual works methodology proposals (which should include the proposal on associated pollution control measures);

í▒   Contract specifications on environmental protection and pollution prevention control;

í▒   Relevant environmental protection and pollution control legislations; and

í▒   Previous site inspection results undertaken by the ET and others.

11.4         The Contractor should keep the ER and ET Leader updated with all relevant environmental related information on the construction contract necessary for him/her to carry out the site inspections. Site inspection results and associated recommendations for improvements to the environmental protection and pollution control efforts should be recorded and followed up by the Contractor in an agreed time-frame.  The Contractor should follow the procedures and time-frame stipulated in the environmental site inspection, and the deficiency and remedial action reporting system to be formulated by the ET Leader, to report on any remedial measures subsequent to the site inspections.

 

11.5         The ER, ET and the Contractor should also carry out ad hoc site inspections if significant environmental problems are identified.  Inspections may also be required subsequent to receipt of an environmental complaint, or as part of the investigation work, as specified in the Event and Action Plan for the EM&A programme.

Compliance with Legal and Contractual Requirements

11.6         There are statutory and contractual requirements on environmental protection and pollution control with which construction activities must comply.

 

11.7         To ensure that the works are in compliance with the contractual requirements, all method statements of works should be submitted by the Contractor to the ER for approval and to the ET Leader for vetting to determine if sufficient environmental protection and pollution control measures have been included. The implementation schedule of mitigation measures is summarized in Appendix C.

 

11.8         The ER and ET Leader should also review the progress and programme of the works to check that relevant environmental legislations have not been violated, and that any foreseeable potential for violating laws can be prevented.

 

11.9         The Contractor should provide the update of the relevant documents to the ET Leader so that works checking could be carried out effectively. The document should at least include the updated Works Progress Reports, updated Works Programme, any application letters for licences / permits under the environmental protection legislations, and copies of all valid licences / permits. The site diary should also be available for the inspection by the relevant parties.

11.10       After reviewing the documentation, the ET Leader should advise the Contractor of any non-compliance with contractual and legislative requirements on environmental protection and pollution control so that they can timely take follow-up actions as appropriate.  If the follow-up actions may still result in violation of environmental protection and pollution control requirements, the ER and ET should provide further advice to the Contractor to take remedial action to resolve the problem.

11.11       Upon receipt of the advice, the Contractor should undertake immediate action to remedy the situation. The ER and ET should follow up to ensure that appropriate action has been taken in order to satisfy contractual and legal requirements.

Environmental Complaints

 

11.12       The following procedures should be undertaken upon receipt of any environmental complaint:

 

i.     The Contractor to log complaint and date of receipt onto the complaint database and inform the ER, ET and IEC immediately;

ii.    The Contractor to investigate, with the ER and ET, the complaint to determine its validity, and assess whether the source of the problem is due to construction works of the Project with the support of additional monitoring frequency and stations, if necessary;

iii.   The Contractor to identify remedial measures in consultation with the IEC, ET and ER if a complaint is valid and due to the construction works of the Project;

iv.   The Contractor to implement the remedial measures as required by the ER and to agree with the ET and IEC any additional monitoring frequency and stations, where necessary, for checking the effectiveness of the remedial measures;

v.    The ER, ET and IEC to review the effectiveness of the Contractor's remedial measures and the updated situation;

vi.   The ET/Contractor to undertake additional monitoring and audit to verify the situation if necessary, and oversee that circumstances leading to the complaint do not recur;

vii.  If the complaint is referred by the EPD, the Contractor to prepare interim report on the status of the complaint investigation and follow-up action stipulated above, including the details of the remedial measures and additional monitoring identified or already taken, for submission to EPD within the time frame assigned by the EPD; and

viii. The ET to record the details of the complaint, results of the investigation, subsequent actions taken to address the complaint and updated situation including the effectiveness of the remedial measures, supported by regular and additional monitoring results in the monthly EM&A reports.

 

 


12.          Reporting

 

Introduction

12.1        Types of reports that the ET should prepare and submit include Baseline Monitoring Report, Monthly EM&A Reports and Final EM&A Review Report.  In accordance with Annex 21 of the EIAO-TM, a copy of the monthly and final review EM&A reports should be made available to the Director of Environmental Protection.

12.2        Reports can be provided in an electronic medium upon agreeing the format with the ER and EPD.  All the monitoring data (baseline and impact) should be submitted in electronic medium.  Sample data sheets for air quality, noise and water monitoring are shown in Appendices B1 to B3.

Baseline Monitoring Report

12.3        The ET should prepare and submit a Baseline Environmental Monitoring Report (excluding water quality) at least one month before commencement of construction of the Project.   Baseline Monitoring Report for water quality should be prepared and submitted at least one month before the commencement of construction works for the Project. Copies of the Baseline Environmental Monitoring Report should be submitted to the IEC, ER and EPD.  The ET should liaise with the relevant parties on the exact number of copies require. 

12.4        The Baseline Monitoring Report should include at least the following information:

(i)        up to half a page of executive summary;

(ii)       brief description of project background information;

(iii)      drawings showing locations of the baseline monitoring stations;

(iv)      monitoring results (in both hard and diskette copies) together with the following information:

Ÿ   monitoring methodology

Ÿ   name of laboratory and types of equipment used and calibration details

Ÿ   parameters monitored

Ÿ   monitoring locations (and depth)

Ÿ   monitoring date, time, frequency and duration

Ÿ   QA/QC results and detection limits

(v)       details of influencing factors, including:

Ÿ   major activities, if any, being carried out on the Project site during the period

Ÿ   weather conditions during the period

Ÿ   other factors which might affect the  monitoring results

(vi)      determination of the Action and Limit Levels (AL levels) for each monitoring parameter and statistical analysis of the baseline data;

(vii)     revisions for inclusion in the EM&A Manual; and

(viii)     comments and conclusions.

 


Monthly EM&A Reports

12.5        The results and findings of all EM&A works required in this Manual should be recorded in the monthly EM&A reports prepared by the ET and endorsed by the IEC.  The first Monthly EM&A Report should be prepared and submitted to EPD within a month after the major construction works commences with the subsequently Monthly EM&A Reports due in 10 works days of the end of each reporting month.  Copies of each monthly EM&A report should be submitted to each of the three parties: ER, IEC and EPD.  Before submission of the first monthly EM&A Report, the ET should liaise with the parties on the exact number of copies and format of the monthly reports in both hard copy and electronic copies.

12.6        The ET Leader should review the number and location of monitoring stations and parameters every six months, or on as needed basis, in order to cater for any changes in the surrounding environment and the nature of works in progress.

First Monthly EM&A Report

12.7        The first Monthly EM&A Report should include at least but not limited to the following:

(i)        executive summary (1-2 pages):

Ÿ   breaches of Action and Limit levels;

Ÿ   complaint log;

Ÿ   notifications of any summons and successful prosecutions;

Ÿ   reporting changes; and

Ÿ   future key issues.

(ii)       basic project information:

Ÿ   project organization including key personnel contact names and telephone numbers;

Ÿ   construction programme;

Ÿ   management structure; and

Ÿ   works undertaken during the reporting month.

(iii)      environmental status:

Ÿ   advice on the status of statutory environmental compliance, such as the status of compliance with the EP conditions under the EIAO, submission status under the EP and implementation status of mitigation measures;

Ÿ   works undertaken during the reporting month with illustrations (e.g. location of works, etc); and

Ÿ   drawings showing the Project area, any environmental sensitive receivers and the locations of the monitoring stations.

(iv)      summary of EM&A requirements:

Ÿ   all monitoring parameters;

Ÿ   environmental quality performance limits (Action and Limit levels);

Ÿ   Event and Action Plans;

Ÿ   environmental mitigation measures, as recommended in the EIA Report; and

Ÿ   environmental requirements in contract documents.

(v)       implementation status:

Ÿ   advice on the implementation status of environmental protection and pollution control/mitigation measures as recommended in the EIA Report.

(vi)      monitoring results (in both hard and diskette copies) together with the following information:

Ÿ   monitoring methodology;

Ÿ   name of laboratory and types of equipment used and calibration details;

Ÿ   monitoring parameters;