Amendment History

 

Date:
Rev.
Description

05/2016

A

The EM&A Manual was updated based on the findings in the Environmental Review Report (November 2015) submitted to EPD to support the application for Variation for and Environmental Permit (VEP-487/2015) and matched with the current Environmental Permit (FEP-01/395/2010/C)

i.            Update programme in Table 1.1

ii.          Add ammonia stripping plant in section 2.3, 2.7 & 2.10

iii.        Add ammonia stripping plant in Table 2.1

iv.         Insert Table 2.5 Emission Limit for ASP

v.           New layout plan

This update also based on the comments from ET leader and IEC.

01/2017

 

02/2017

 

07/2017

B

 

C

 

D

The Ammoniawas been inserted in Table 2.1

 

Add ammonia stripping plant to all parameters in Table 2.1

 

Table 2.2 was updated

02/2019

E

Table 2.2, 2.3, 2.4 and 2.5 were updated regarding changes in VOCs discharge limits and descriptions substantiated by the Technical Note – ORRC1 Review of Air Quality Impact Assessment for the Proposed Change of VOC Emission Limit for Cogeneration Units

 

 

ENVIRONMENTAL MONITORING AND AUDIT MANUAL

 

 

Contents

 

 

 

1   INTRODUCTION                                                                      

 

Purpose of Manual 

Project Description 

Project Organization 

Structure of this Manual

 

2   AIR QUALITY                                                                         

 

Introduction

Monitoring during Construction Phase

Monitoring during Commissioning Stage and Operation Phase

 

3   HAZARD TO LIFE                                                                   

 

Introduction 

Mitigation Measures

 

4   WATER QUALITY                                                                   

 

Introduction 

Construction Site Audits

Site Inspection

Compliance Audits

Mitigation Measures

 

5   WASTE MANAGEMENT                                                           

 

Introduction

Waste Management and Control During Construction Phase

Waste Management and Control During Operation Phase 

Approaches to Prevent Land Contamination

 

6   LANDSCAPE AND VISUAL                                                              

 

Introduction

Baseline Review

Mitigation Measures

Design Phase Audit

Construction and Operational Phase Audits

 

7   NOISE                                                                                    

 

Introduction

Good Site Practices

 

8   ENVIRONMENTAL AUDITING                                                 

 

Site Inspection

Compliance with Legal and Contractual Requirements 

Environmental Complaints

 

9   REPORTING                                                                           

 

General

Baseline Monitoring Report

Monthly EM&A Report

Quarterly EM&A Summary Reports

Final EM&A Review Report

Data Keeping

Interim Notifications of Environmental Quality Limit Exceedances

 

 

 

List of Tables

 

Table 1.1        Construction Program

Table 2.1        Analytical Parameters and Methodology

Table 2.2        Emission Limit for Centralized Air Pollution Control Unit

Table 2.3        Emission Limit for Cogeneration Units

Table 2.4        Emission Limit for Standby Flaring Gas Unit

Table 2.5        Emission Limit for ASP

Table 2.6        Odour Intensity Level

Table 2.7        Action and Limit Levels for Odour Nuisance

Table 2.8        Event and Action Plan for Odour Monitoring

Table 6.1        Proposed Landscape and Visual Mitigation Measures for Construction Phase

Table 6.2        Proposed Landscape and Visual Mitigation Measures for Operation Phase

 

List of Figures

 

Figure 1.1       Location Plan of Proposed OWTF Phase I Development

Figure 1.2       Project Area Boundary of Proposed OWTF Phase I Development
Figure 1.3       New OWTF Layout Plan

Figure 1.4        Project Organization EM&A Programme for Construction Phase
Figure 1.5       Project Organization EM&A Programme for Operation Phase

Figure 1.6         Environmental Complaint Flow Diagram

 

 

List of Appendices

 

Appendix A     Implementation Schedule of Mitigation Measures

Appendix B     Sample of Incident Report on Action or Limit Level Non-compliance


1 INTRODUCTION

Purpose of Manual

1.1                The Environmental Monitoring and Audit (EM&A) Manual was updated based on findings in Environmental Review Report (November 2015) submitted to EPD to support the Application for Variation for Environmental Permit (VEP-487/2015) and matched with the current Environmental Permit (FEP-01395/2010/C).

1.2             The purpose of this Environmental Monitoring and Audit (EM&A) Manual is to guide the setup of an EM&A programme for the implementation of the Environmental Impact Assessment (EIA) Study recommendations, to evaluate the effectiveness of the recommended mitigation measures and to identify any further need for additional mitigation measures or remedial action. This Manual outlines the EM&A programme for the construction and operation phases of the proposed Project, namely “Organic Waste Treatment Facilities Phase I (hereinafter referred to as “the Project”). It aims to provide systematic procedures for monitoring, auditing and minimising environmental impacts associated with construction works and operational activities.

 

1.3             Hong Kong environmental regulations and the Hong Kong Planning Standards and Guidelines 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 the EIA Process (EIAO-TM).

 

1.4             This Manual contains the following information:

 

l   Responsibilities of the Contractor, the Supervising Officer (SO)[1], Supervising Officer’s representative (SOR)1,  Environmental Team (ET)[2],  the Independent Environmental Checker (IEC), Environmental Protection Department (EPD) and Monitoring Team (MT) with respect to the EM&A requirements during the course of the Project;

l   project organization for the Project;

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

l   requirements with respect to the construction programme and the necessary EM&A programme to track the varying environmental impact;

l   methodologies to be adopted, including all field, laboratories and analytical procedures, and quality assurance and quality control programme (e.g. calibration of monitoring equipment);

l   definition of Action and Limit levels;

l   establishment of Event and Action plans;

l   procedures for environmental complaints handling;

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

l   requirements  for  presentation  of  EM&A  data  and  appropriate  reporting procedures; and

l   requirements for review of EIA predictions and the effectiveness of the mitigation measures / environmental management system and the EM&A programme.

 

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

Project Description

 

Introduction

 

1.6             The proposed Organic Waste Treatment Facilities (OWTF) Phase I development is to construct and build a biological treatment facility with a capacity of about 200 tonnes per day and convert the source-separated organic waste into compost and biogas through proven biological treatment technologies.

 

1.7             The OWTF Phase I development is proposed to be located in the Siu Ho Wan, North Lantau. The location plan of the Project is shown in Figure 1.1. The total area of the Project site is approximately 2 hectares and it is bounded northeast by North Lantau Highway and southeast by Siu Ho Wan Water Treatment Works (SHWWTW) located. The project area boundary of the OWTF Phase I development is shown in Figure1.2.

 

Project Scope

 

1.8             The Project is planned to be implemented through a Design, Build and Operate (DBO) contract. A reference design for the OWTF Phase I development has been prepared, and the Contractor will be responsible for the detailed design of the facilities; provision and installation of the facilities; testing and commissioning of equipment; operation of the facilities; and monitoring of operation.

 

1.9             The preliminary layout plan of the proposed buildings and facilities in the Project site is shown in Figure 1.3. The key elements of OWTF Phase I developments include:

 

l   Pre-treatment facilities;

 

l   Anaerobic digestion process;

 

l   Post-treatment of digestate;

 

l   Energy recovery system; and

 

l   Air and wastewater treatment facilities.

 

1.10          The OWTF Phase I development will be operated in 24-hour basis daily, while the reception of organic waste would be 14 hours per day, tentatively.

Project Programme

 

1.11           The construction of OWTF Phase I was commenced in 2014. The OWTF is tentatively scheduled for commissioning by early 2017. The tentative project programme is shown in Table 1.1.


 

Table 1.1       Construction Program

 

Description

Tentative Date

Site Handover to EPD

May 2011

Award of Contract

December 2014

Site Establishment and Temporary Works Preparation

December 2014– May 2015

Construction of OWTF Phase I and Ancillary Facilities

May 2015 Sept 2017

Testing and Commissioning

April November 2017

 

 

Project Organization

 

Introduction

 

1.12           The roles and responsibilities of the various parties involved in the construction phase and operation phase EM&A process and the implementation of the EM&A programme are outlined below. The proposed project organization and lines of communication during construction and operation phases with respect to environmental protection works are shown in Figure 1.4 and Figure 1.5 respectively.

 

Construction Phase

 

 Supervising Officer (SO) and Su per vising Officer’s Representative (SOR)

 

1.13           The term SO and SOR refers to the organization responsible for overseeing the construction works of the Project undertaken by the Contractor, and for ensuring that they are undertaken by the Contractor in accordance with the specification and contractual requirements.  The responsibilities for SO and SOR include the following:

 

l   Monitor the Contractor’s compliance with contract specifications, including the implementation and operation of the environmental mitigation measures and ensure their effectiveness, and other aspects of the EM&A programme;

l   Monitor the Contractor’s, the ET’s and the IEC’s compliance and ensure that the requirements in the Environmental Permit (EP) and EM&A Manual are fully complied with;

l    Provide assistance to the ET as necessary in the implementation of the M&A programme;

l    Participate in joint site inspection undertaken by the ET and the IEC;

 

l    Comply with the agreed Event / Action Plan in the event of any exceedance; and

 

l    Adhere to the procedures for carrying out complaint investigation.

 

Contractor

1.14           The term “Contractor” should be taken to mean all construction contractors and sub- contractors, working on site at any one time. Besides reporting to the SOR, the Contractor should also be responsible for the following tasks:

 

l   Work within the scope of the relevant contract and other tender conditions;

 

l    Provide assistance to the ET in carrying out monitoring;

 

l   Participate in the site inspections undertaken  by the ET  as required,  and undertake any corrective actions;

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

l   Submit proposals on mitigation measures in case of exceedances of Action or Limit levels in accordance with the Event / Action plans;

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

l    Adhere to the procedures for carrying out complaint investigation. Independent Environmental Checker (IEC)

1.15           The IEC should not be in any way an associated body of the Contractor for the Project.  The responsibilities for IEC should include the following:

 

l   Advise the SOR on environmental issues related to the Project, independent from the management of construction works, but empowered to audit the environmental performance of construction and operation;

l   Provide proactive advice to the SOR and the Employer of the Project on environmental matters;

l   Review and audit all aspects of the EM&A programme, including the implementation of environmental mitigation measures, submission relating to the EP and EM&A, and any other submission required under the EP and EM&A Manual;

l   Review and verify the monitoring data and all submissions relating to or under the EP and EM&A Manual submitted by the ET, including but not limited to the EM&A reports;

l   Monitor the implementation of the EM&A programme and the overall level of environmental performance being achieved;

l   Arrange and conduct regular, at least monthly site inspections of the works during construction phase, and ad hoc inspections if significant environmental problems are identified;

l    Comply with the agreed Event / Action Plan in the event of any exceedance;

 

l   Check and ensure the procedures for carrying out complaint investigation being followed and check the effectiveness of corrective measures;

l    Feedback audit results to ET by signing off relevant EM&A proforma;

 

l   Ensure the impact monitoring is conducted at the correct locations at the frequency identified in the EM&A Manual;

l    Check that the mitigation measures are effectively implemented; and

 

l    Report the works conducted, the findings, recommendation and improvement of the site inspections, the findings, recommendation, and improvement after reviewing the ET’s and the Contractor’s wor.ks, and any advices to the SOR and the Employer of the Project on a monthly basis.

 

Environmental Team

 

1.16           The ET shall not be in any way an associated body of the Contractor, and shall be responsible to conduct the EM&A programme. The ET should be managed by the ET Leader. The ET Leader shall be a person who has at least 7 years’ experience in EM&A and have relevant professional qualifications. Suitably qualified staff should be included in the ET, and resources for the implementation of the EM&A programme should be allocated in time under the Contract, to enable fulfilment of the Project’s EM&A requirements as specified in the EM&A Manual during construction of the Project.  The ET shall report to the SOR and the duties of ET shall include the following:

 

l   Monitor and audit various environmental parameters as required in this EM&A Manual;

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

l   Carry out regular site inspection to investigate and audit the Contractor’s site practice, equipment and work methodologies with respect to pollution control and environmental mitigation, and effect proactive action to pre-empt problems;

l   Monitor compliance with conditions in the EP, environmental protection, pollution prevention and control regulations and contract specifications;

l    Audit environmental monitoring data and site environmental conditions;

 

l   Report on the environmental monitoring and audit results to EPD, the SOR, the IEC and Contractor or their delegated representative;

l   Recommend suitable mitigation measures to the Contractor in the case of exceedance of Action or Limit levels in accordance with the event and action plans;

l   Liaise with the IEC on all environmental performance matters and timely submit all relevant EM&A proforma for approval by the IEC;

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

l    Adhere to the procedures for carrying out complaint investigation; and

 

l    Timely submit the EM&A Reports to the EPD.

 

1.17           Sufficient and suitably qualified professional and technical staff should be employed to ensure full compliance with their duties and responsibilities, as required under the EM&A programme during the construction phase of the Project.

 

Operation Phase

 

1.18           Under the DBO contract, the Contractor will be responsible for the operation of the OWTF. The Contractor shall ensure full compliance with the conditions of the EP during its operation. A Monitoring Team (MT) should be employed by the Contractor to carry out the monitoring works during the operation phase as required in this EM&A Manual.

 

1.19           The MT shall be managed by the MT Leader to analyze the monitoring results. The MT Leader shall be a person who has at least 7 years’ experience in EM&A and have relevant professional qualifications. Suitably qualified staff should be included in the MT, and resources for the implementation of the monitoring programme should be allocated in time under the Contract, to enable fulfilment of the Project’s monitoring requirements as specified in the EM&A Manual during operation of the Project.  The responsibilities for MT should include the following:

 

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

 

l   Report on the environmental monitoring results to the Contractor, the SOR, and the IEC;

l   Analyze monitoring results collected from the monitoring works;

 

l   Prepare monitoring reports to provide the impact evaluation results to the Contractor, the SOR and the IEC; and

l   Recommend suitable actions to the Contractor and SOR in case of exceedance of any assessment criteria.

 

Structure of this Manual

 

1.20           Following this introductory section, the structure of the EM&A Manual is set out below:-

 

l   Section 2 details the requirement for impact monitoring for dust during the construction phase and for air emission from OWTF and odour during the operation phase.

l   Section 3 details the audit requirements with regard to hazard to life issues.

l   Section 4 details the requirements for baseline and impact monitoring for water quality during the construction phase.

l   Section 5 details the audit requirements with regard to waste management issues as well as the waste control and mitigation measures recommended in the EIA.

l   Section 6 details the requirements with regard to landscape and visual issues.

l   Section 7 details the requirements with regard to noise issues

l   Section 8 details the requirements on site environmental audit and the environmental complaints handling procedure.

l   Section 9 details the EM&A reporting requirements.

 

2 AIR QUALITY

 

Introduction

1.21          This section presents the requirements, methodology, equipment, criteria and protocols for the monitoring and audit of air quality impacts during the construction and operational phases of the Project.

 

1.22          The objectives of the air quality monitoring include the following:-

 

l   to identify the extent of construction dust and operational odour impacts;

 

l   to determine the effectiveness of mitigation measures to control dust emission from activities during construction phase and odour control measures during operational phase;

l   to audit the compliance of the Contractor with regard to dust control, contract conditions and the relevant dust impact criteria;

l   to recommend further mitigation measures if found to be necessary; and

 

l   to comply with action and limit levels for air quality as defined in this Manual.

 

1.23          During construction phase of the Project, dust impacts would be the major air quality impacts. While during operation phase of the Project, stack emissions from the centralized air pollution control unit (CAPC), the cogeneration units, the ammonia stripping plant (ASP) and the standby flare would be the key environmental issue. Odour emission from the operation of OWTF would be another environmental issue.

 

Monitoring during Construction Phase

 

1.24          With the implementation of practicable dust suppression measures stipulated in the Air Pollution Control (Construction Dust) Regulation, adverse construction dust impact at the Air Sensitive Receiver (ASR) is not expected during construction of the Project. Yet, regular site environmental audits during the construction phase of the Project as described in Section 8 of this Manual should be conducted to ensure that the recommended dust suppression measures are implemented properly.

 

1.25          Mitigation measures for dust control have been recommended in the EIA Report and are listed below:

 

l   Use of regular watering, with complete coverage, to reduce dust emissions from exposed site surfaces and unpaved roads, particularly during dry weather;

l   Use of frequent watering for particularly dusty construction areas and areas close to ASRs;

 

l   Side enclosure and covering of any aggregate or dusty material storage piles to reduce emissions. Where this is not practicable owing to frequent usage, watering should be applied to aggregate fines;

 

l   Open stockpiles should be avoided or covered. Where possible, prevent placing dusty material storage piles near ASRs;

 

l   Tarpaulin covering of all dusty vehicle loads transported to, from and between site locations;

 

l   Establishment and use of vehicle wheel and body washing facilities at the exit points of the site;

 

l   Provision of wind shield and dust extraction units or similar dust mitigation measures at the loading points, and use of water sprinklers at the loading area where dust generation is likely during the loading process of loose material, particularly in dry seasons/ periods;

 

l   Imposition of speed controls for vehicles on unpaved site roads. 8 kilometers per hour is the recommended limit;

 

l   Where possible, routing of vehicles and positioning of construction plant should be at the maximum possible distance from ASRs;

 

l   Every stock of more than 20 bags of cement or dry pulverised fuel ash (PFA) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides;

 

l   Cement or dry PFA delivered in bulk should be stored in a closed silo fitted with an audible high level alarm which is interlocked with the material filling line and no overfilling is allowed; and

 

l   Loading, unloading, transfer, handling or storage of bulk cement or dry PFA should be carried out in a totally enclosed system or facility, and any vent or exhaust should be fitted with an effective fabric filter or equivalent air pollution control system.

 

1.26             The Contractor shall be responsible for the design and implementation of these measures.

 

Monitoring during Commissioning Stage and Operation Phase

 

Stack Monitoring

 

1.27             Monitoring of air quality parameters of concern due to stack emissions from centralized air pollution control unit, the ammonia stripping plant, the cogeneration units and the standby flaring gas unit should be conducted during commissioning stage. During the operation phase of the Project, stack monitoring shall be installed for the centralized air pollution control unit, the ammonia stripping plant and the cogeneration units of OWTF.

 

1.28             The parameters for measurement and the analytical methods are listed in Table 2.1. It should be noted that the proposed sampling methods below are for reference only and should be subject to the approval of EPD.

 

Table 2.1         Analytical Parameters and Methodology

 

Parameters

Method

Stacks to be Monitored

Gaseous and vaporous organic substances

USEPA Method 18

USEPA Method 0031

·       Centralized Air Pollution Control Unit

·        Cogeneration Units

·       Standby   Flaring   Gas

·       Ammonia Stripping Plant

Particulate

ISO 9096,

ASTM D3685-98,

USEPA Method 17

·       Centralized Air Pollution Control Unit

·        Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

Carbon monoxide

Combustion Gas Analyser

·       Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

NOx

USEPA Reference methods USEPA Method 7 and

associated methods

·       Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

SO2

USEPA Method 8

·       Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

HCl and HF

USEPA Method 26

A USEPA Method 13B sampling train

·       Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

Oxygen

Combustion Gas Analyser (chemical cell and paramagnetic)

·       Centralized Air Pollution Control Unit

·        Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

Velocity and Volumetric Flow

ISO 10780 and ISO 9096

·       Centralized Air Pollution Control Unit

·        Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

Water Vapour Content and Temperature

USEPA Method 4

·       Centralized Air Pollution Control Unit

·        Cogeneration Units

·       Standby   Flaring   Gas Unit

·       Ammonia Stripping Plant

Ammonia

USEPA CTM 027

·       Ammonia Stripping Plant

 

1.29             Necessary monitoring equipment and techniques should be provided and used to demonstrate that the process is properly operated and the emissions can be minimized to   meet   the   air   pollution   control   requirements   as   tabulated   in Tables   2.2, 2.3, 2.4 and 2.5 below.

 

Table 2.2       Emission Limit for Centralized Air Pollution Control Unit

 

Parameter

Emission Level (mg/Nm3)

VOCs (including methane)

680

Dust (or Total Suspended Particulates)

6

Odour (including NH3 & H2S)

220 (1)

Note:               (1) The odour unit is ou/Nm3.

 

 

Table 2.3             Emission Limit for Cogeneration Units

 

Parameter

Maximum Emission Level (mg/Nm3) (1)

Dust (or Total Suspended Particulates)

15

Carbon Monoxide

650

NOx

300

SO2

50

NMVOCs

150

VOCs (including methane) (2)

1,500

HCl

10

HF

1

Note: (1) All values refer to an oxygen content in the exhaust gas of 6% and dry basis.

          (2) The VOCs emission limit include methane as biogas is adopted as fuel in the combustion process.

 


 

Table 2.4       Emission Limit for Standby Flaring Gas Unit

 

Parameter

Maximum Emission Level (mg/Nm3) (1)

Dust (or Total Suspended Particulates)

5

Carbon Monoxide

100

NOx

200

SO2

50

VOCs (including methane) (2)

20

HCl

10

HF

1

Note:    (1) All values refer to an oxygen content in the exhaust gas of 11% and dry basis.

          (2) The VOCs emission limit include methane as biogas is adopted as fuel in the combustion process.

 

Table 2.5        Emission Limit for ASP

 

Parameter

Maximum Emission Level (mg/Nm3) (1)

Dust (or Total Suspended Particulates)

5

Carbon Monoxide

100

NOx

200

SO2

50

VOCs (including methane) (2)

20

NH3

35

HCl

10

HF

1

Note: (1) All values refer to an oxygen content in the exhaust gas of 11% and dry basis.

          (2) The VOCs emission limit include methane as biogas is adopted as fuel in the combustion process.

                                   

 

1.30           On-line monitoring should be carried out for centralized air pollution control unit, cogeneration and ASP units during the operation phase of the OWTF. The continuous monitoring data should be transmitted instantaneously to EPD by telemetry system in such manner and the format to be agreed with EPD. The record should be retained at the premises for a minimum of two years, or other period specified by EPD, after the date of last entry and be made available for examination as and when required by EPD.

 

1.31        Evidence should be provided to demonstrate quality assurance procedures are in place to ensure all monitoring results are sufficiently accurate and reliable. Calibration on the monitoring equipment has to be done by means of parallel measurements with the reference methods as agreed by EPD.

 

1.32           The on-line monitoring of the in-stack exhaust gas shall be carried out. The continuous monitoring data should be transmitted instantaneously to EPD by telemetry system in such manner and format agreed with EPD. The  parameters to be continuously monitored are listed below:

 

l nitrogen oxides

 

l hydrogen chloride

 

l hydrogen fluoride

 

l sulphur dioxide

 

l ammonia

 

l gaseous and vaporous organic substances

 

l carbon monoxide

 

l oxygen

 

l pressure

 

l temperature

 

l water vapour content (continuous measurement of the water vapour content should not be required if the sample exhaust gas is dried before the emissions are analysed.)

 

Odour Monitoring

 

Commissioning Stage

 

1.33           Odour sampling works should be conducted weekly in the first month of the commissioning stage of the Project. The air samples at the stack of Centralized Air Pollution Control Unit under full capacity of operation should be collected for olfactometry analysis. Duplicate samples should be collected for each sampling exercise.

 

1.34           The following items should be recorded during sampling:

 

l   the prevailing weather condition;

 

l   the wind direction;

 

l   any odour detected  during  sampling and the  flavours  of  odour with detailed description of characteristics (e.g. sewage or rotten-egg smell, decayed vegetables, ammonical, dischargeable odour, putrefaction, sharp, pungent, fish, irritating, fruit, vinegar, etc);

 

l   downwind or upwind direction from the odour source;

 

l   duration of odour (intermittent or continuous) during sampling; and

 

l   photo showing the sampling locations relative to existing land features The relevant meteorological data (e.g. ambient temperature, wind speed and direction, etc.) from the nearest Hong Kong Observatory station during the sampling period should also be recorded for reference.

1.35           The collected air samples should be delivered to the laboratory for olfactometry analysis within 24 hours.

 

1.36           The odour concentration of the collected air samples should be determined by a forced- choice dynamic olfactometer with a panel of human assessors being the sensor in accordance with the European Standard Method: Air Quality Determination of Odour Concentration by Dynamic Olfactometry (EN13725) within 24 hours after collection.

 

1.37           The odour laboratory should be ventilated to maintain an odour-free environment and to provide fresh air to the panel members. Each odour testing session should comprise at least five qualified panellists. All of the panellists should be screened beforehand by using 50 ppm solution/mixture of certified n-butanol standard gas.

 

1.38           During each odour sampling day, one blank sample should be collected for quality control. The sample should be taken by purging pure nitrogen gas into the odour bag directly on site as a blank sample.

 

1.39           The olfactometry analysis should be conducted by the testing laboratories complying with the European Standard EN13725:2003. The laboratories should provide the QA/QC results in the laboratory analysis report.

 

Operation Phase

 

1.40           To determine the effectiveness of the proposed odour mitigation measures and to ensure the odour impacts arising from operation of the OWTF and the on-site wastewater treatment unit meeting the air pollution control requirements, odour patrol shall be conducted.

 

1.41           The odour patrols shall be conducted by an odour patrol team. The odour patrol team will patrol and sniff along an odour patrol route at the OWTF site boundary as shown in Figure 1.2. The implementation of the odour patrol shall be subject to the prevailing weather forecast condition and no odour patrol should be carried out during rainy day. The odour patrol team should be comprised of at least two independent trained personnel / competent persons, who should pass a set of screening tests and fulfil the following requirements:

 

l   have their individual odour threshold of n-butanol in nitrogen gas in the range of 20 to 80 ppb/v required by the European Standard Method (EN 13725);

 

l   be at least 16 years of age and willing and able to follow instructions;

 

l   be free from any respiratory illnesses;

 

l   be engaged for a sufficient period to build up and monitor/detect at several monitoring location;

 

l   not be allowed to smoke, eat, drink (except water) or use chewing gum or sweets 30 min before and during odour patrol;

 

l   take great care not to cause any interference with their own perception or that of others by lack of personal hygiene or the use of perfumes, deodorants, body lotions or cosmetics; and

 

l   not communicate with each other about the results of their choices.

 

1.42           The independent trained personnel / competent persons should use their noses (olfactory sensors) to sniff odours at different locations. The main odour emission sources and the areas to be affected by the odour nuisance shall be identified. During the patrol, the sequence should start from less odorous locations to stronger odorous locations.

 

1.43           The perceived odour intensity is divided into 5 levels. Table 2.6 describes the odour intensity for different levels.

 

Table 2.6       Odour Intensity Level

 

Level

Odour Intensity

0

Not detected. No odour perceived or an odour so weak that it cannot be easily

characterised or described

1

Slight identifiable odour, and slight chance to have odour nuisance

2

Moderate identifiable odour, and moderate chance to have odour nuisance

3

Strong identifiable, likely to have odour nuisance

4

Extreme severe odour, and unacceptable odour level

 

 

1.44           The independent trained personnel / competent persons should record the findings including date and time, weather condition (e.g. sunny, fine, cloudy, and rainy), odour intensity, odour nature and possible odour sources, local wind speed, and wind direction at each location. In addition, some relevant meteorological data such as daily average temperature, and daily average humidity, on the day of odour patrol should be obtained from the nearest Hong Kong Observatory stations including Siu Ho Wan Weather Station and Chek Lap Kok Airport Weather Station for reference.

 

1.45           Odour patrols should be conducted in summer (i.e. from July to September). In the first 2 operational years of the OWTF, monthly odour patrols should be conducted. Odour patrols should be carried out during daytime and evening / night time when the OWTF and its on-site wastewater treatment plant are operated under the normal operating condition.

 

1.46           The need to continue the odour patrol after the end of the 2-year monitoring period would depend on the monitoring results and should be agreed with EPD. If the level of odour intensity at any sniffing location is higher than 1 due to potential odour emission from the OWTF and its on-site wastewater treatment unit in two consecutive months, the odour patrol programme would be extended until the level of odour intensity (that is determined to be due to potential odour emission from the OWTF and its on-site wastewater treatment unit) at all the sniffing locations have dropped to 0 in three consecutive months.

 

1.47           Table 2.7 shows the action level and limit level to be used for odour patrol. Should any exceedance of the action and limit levels occurs, actions in accordance with the event and action plan in Table 2.8 should be carried out.

 

Table 2.7         Action and Limit Levels for Odour Nuisance

 

Parameter

Action Level

Limit Level

Odour Nuisance (from odour patrol)

When one documented compliant is received(1), or

Odour Intensity of 2 is measured from odour patrol.

Two or more documented complaints are received(1) within a week; or

Odour intensity of 3 or above is measured from odour patrol.

Note:

 

(1) Once the compliant is received by the Project Proponent (EPD), the Project Proponent would investigate and verify the complaint whether it is related to the potential odour emission from the OWTF and its on-site wastewater treatment unit.


 

Table 2.8     Event and Action Plan for Odour Monitoring

 

 

 

EVENT

ACTION

Person-in-charge of Odour Monitoring

Project Proponent(1)

ACTION LEVEL

Exceedance of

action level (Odour Patrol)

1.  Identify source/reason of exceedance;

2.  Repeat odour patrol to confirm finding.

1.  Carry out investigation to identify the source/reason of exceedance.   Investigation should be completed within 2 weeks;

2.   Rectify any unacceptable practice;

 

3.   Implement more mitigation measures if necessary;

4.   Inform DSD or the operator of the Siu Ho Wan Sewage Treatment Works (SHWSTW) if exceedance is considered to be caused by the operation of the SHWSTW.

5.   Inform North Lantau Refuse Transfer Station (NLTS) operator if exceedance is considered to be caused by the operation of NLTS.


 

 

 

EVENT

ACTION

Person-in-charge of Odour Monitoring

Project Proponent(1)

Exceedance of action level (Odour Complaints)

1.   Identify source/reason of exceedance;

2.   Carry out odour patrol to determinate odour intensity.

1.  Carry out investigation and verify the complaint whether it is related to potential odour emission from the nearby SHWSTW;

2.  Carry out investigation to identify the source/reason of exceedance.  Investigation should be completed within 2 weeks;

3.  Rectify any unacceptable practice;

 

4.  Implement more mitigation measures if necessary;

5.  Inform DSD or the operator of the SHWSTW if exceedance is considered to be caused by the operation of the SHWSTW.

6.  Inform North Lantau Refuse Transfer

Station (NLTS) operator if exceedance is considered to be caused by the operation of NLTS.

 


 

 

 

EVENT

ACTION

Person-in-charge of Odour Monitoring

Project Proponent(1)

LIMIT LEVEL

Exceedance of Limit level

1.   Identify source/reason of exceedance;

2.   Inform EPD;

 

3.   Repeat odour patrol to confirm findings;

4.   Increase odour patrol frequency to bi-weekly;

5.   Assess effectiveness of remedial action and keep EPD informed of the results;

6.   If exceedance stops, cease additional odour patrol.

1.  Carry out investigation to identify the source/reason of

exceedance.  Investigation should be completed within 2 week;

2.  Rectify any unacceptable practice;

 

3.  Formulate remedial actions;

 

4.  Ensure remedial actions properly implemented;

5.  If exceedance continues, consider what more/enhanced mitigation measures should be implemented;

6.  Inform DSD or the operator of the SHWSTW if exceedance is considered to be caused by the operation of the SHWSTW.

Note: (1) Project Proponent shall identify an implementation agent.

 

1.48           In the event when an odour compliant is received, Project Proponent should liaise with the complainant and register the complaint. The compliant register is to record detailed information regarding the odour compliant and hence, facilities efficient investigation work. The registration should contain, but not be limited to the following information:

 

l Location of where the odour nuisance occurred;

 

l Date and time of the complaint and the nuisance event;

 

l Description of the complaint, i.e. the type and characteristics of the odour; and an indication of the odour strength (highly offensive / offensive / slightly offensive / just continuously detectable / intermittently detectable);

l Meteorological conditions from the nearest HK Observatory station at the time of complaint; and

l Name and contact information of the complainant.


 

3 HAZARD TO LIFE

 

Introduction

 

3.1       A hazard assessment has been conducted in this EIA study and it is concluded that construction and operation of the OWTF would not increase the risk of chlorine release at the Siu Ho Wan Water Treatment Works (SHWWTW). Impact of chlorine store and chlorine delivery operation at SHWWTW on construction workers and on-site personnel could be reduced with all the recommended practicable mitigation measures.

 

3.2       Mitigation/safety measures for hazard to life have been recommended in the EIA Report and are presented below.

 

Mitigation Measures

 

3.3       Construction Phase

 

l   The number of workers on site during construction stage should be kept at the same level as the assessment.

 

l   Construction works should be suspended when delivery of chlorine takes place.

 

l   3m high fence should be constructed along the boundary facing the SHWWTW.

 

l   Emergency evacuation procedures should be formulated and the Contractor should ensure all workers on site should be familiar with these procedures as well as the route to escape in case of gas release incident. Relevant Departments, such as Fire Services Department (FSD), should be consulted during the development of Emergency procedures. Diagram showing the escape routes to a safe place should be posted in the site notice boards and at the entrance/exit of site. A copy of the latest version emergency procedures should be dispatched to Tung Chung Fire Station for reference once available.

 

l   The emergency procedures should specify means of providing a rapid and direct warning (e.g. Siren and Flashing Light) to construction workers in the event of chlorine gas release in the SHWWTW.

 

l   The Contactor should establish a communication channel with the SHWWTW operation personnel and FSD during construction stage.  In case of any hazardous incidents in the treatment works, operation personnel of SHWWTW should advise the Contractor to inform construction workers to proceed with emergency procedure. The Contractor should appoint a Liaison Officer to communicate with FSD Incident Commander on site in case of emergency.

 

l   Introduction training should be provided to any staff before carryout construction works at the Project site.

 

l   Periodic drills should be coordinated and conducted to ensure all construction personnel are familiar with the emergency procedures. Upon completion of the drills, a review on every step taken should be conducted to identify area of improvement. Prior notice of periodic drills should be given to Station Commander of Tung Chung Fire Station. Joint operational exercise with FSD and SHWWTW is recommended.

 

3.4        Operation Phase

 

l   The site office should be close to the western boundary of the Project site and away from the SHWWTW’s chlorine store as far as possible.

 

l   3m high fence should be constructed along the boundary facing the SHWWTW.

 

l   Emergency evacuation procedures should be formulated and the Contractor should ensure on site staff should be familiar with these procedures. Diagram showing the escape routes to a safe place should be posted in the site notice boards and at the entrance/exit of site. A copy of the latest version emergency procedures should be dispatched to Tung Chung Fire Station for reference once available.

 

l   The emergency procedures should specify means of providing a rapid and direct warning (e.g. Siren and Flashing Light) to personnel on site in the event of chlorine gas release in the SHWWTW.

 

l   The Contractor should establish a communication channel with the SHWWTW operation personnel and FSD. In case of any hazardous incidents in the treatment works, operation personnel of SHWWTW should advise the Contractor to inform personnel on site to proceed with emergency procedure. The Contractor should appoint a Liaison Officer to communicate with FSD Incident Commander on site in case of emergency.

 

l   Periodic drills should be coordinated and conducted to ensure all on site personnel are familiar with the emergency procedures. Upon completion of the drills, a review on every step taken should be conducted to identify area of improvement. Prior notice of periodic drills should be given to Station Commander of Tung Chung Fire Station. Joint operational exercise with FSD and SHWWTW is recommended.


4 WATER QUALITY

 

Introduction

 

4.1       The water quality impact assessment indicated that no adverse water quality impact would be expected associated with the construction and operation of the Project, with implementation of recommended mitigation measures. No unacceptable residual water quality impact was expected. Water quality monitoring is therefore not considered necessary. Regular site inspection shall be undertaken to inspect the construction activities and works areas in order to ensure that the recommended mitigation measures are properly implemented.

 

Construction Site Audits

 

4.2       Regular site audits will help to ensure that the recommended mitigation measures are properly implemented during the construction works. It can also provide an effective means of control of any malpractices, and therefore achieve continual improvement of environmental performance on site.

 

Site Inspection

 

4.3       Site inspections should be carried out by the ET and should be based on the recommended mitigation measures for water pollution control. In the event that the recommended mitigation measures are not fully or properly implemented, deficiency should be recorded and reported to the site management. Suitable actions are to be carried out to:

 

l   Record the problems and investigate the causes;

l   Issue action notes to the Contractor who is responsible for the works;

l   Implement remedial and corrective actions immediately;

l   Re-inspect the site conditions upon completion of the remedial and corrective actions; and

l   Record the event and discuss with the Contractor for preventive actions.

 

Compliance Audits

 

4.4     Compliance audits are to be undertaken to ensure that a valid discharge licence has been issued by EPD prior to the discharge of effluent from the Project site. If monitoring of the treated effluent quality from the works areas is required during the construction phase of the Project, the monitoring should be carried out in accordance with the Water Pollution Control Ordinance (WPCO) licence which is under the ambit of the relevant Regional Office (RO) of EPD. The audit results reflect whether the effluent quality is in compliance with the discharge licence requirements. In the event of non-compliance, suitable actions by the relevant parties should be undertaken to:

 

l   Notify the site management on the non-compliance;

 

l   Identify the sources of pollution;

 

l   Check the implementation status of the recommended mitigation measures;

 

l   Investigate the operating conditions of the on-site treatment systems;

 

l   Implement corrective and remedial actions to improve the effluent quality;

 

l   Increase monitoring frequency until the effluent quality is in compliance with the discharge licence requirements; and

 

l   Record the non-compliance and propose preventive measures.

 

Mitigation Measures

 

4.5       Mitigation measures for water quality control have been recommended in the EIA Report and listed in the implementation schedule given in Appendix A.

 

4.6       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.

 


5 WASTE MANAGEMENT

 

Introduction

 

5.1       Waste management would be the Contractor’s responsibility to ensure that all wastes produced during the construction of the Project are handled, stored and disposed of in accordance with the recommended good waste management practices and EPD’s regulations and requirements.

 

5.2       Waste materials generated from construction activities, such as excavated materials, C&D materials and general refuse, are recommended to be audited at regular intervals (at least once per week as part of the regular site inspections) to ensure that proper storage, transportation and disposal practices are being implemented. The Contractor would be responsible for the implementation of mitigation easures to minimise waste or redress problems arising from the waste materials.

 

5.3       Mitigation measures for waste management as recommended in the EIA Report are summarised below. With proper handling, storage and disposal of waste arisings during the construction phase of the Project, the potential to cause adverse environmental impacts would be minimized.

 

Waste Management and Control During Construction Phase

 

Good Site Practices

 

5.4       Adverse environmental impacts in related to waste management are not expected, provided that good site practices are strictly followed. Recommendations for good site practices during the construction phase would include:

 

l   Obtain relevant waste disposal permits from appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap. 354) and subsidiary Regulations and the Land (Miscellaneous Provisions) Ordinance (Cap. 28);

l   Provide staff training for proper waste management and chemical handling procedures;

l   Provide sufficient waste disposal points and regular waste collection;

l   Provide appropriate measures to minimize windblown litter and dust during transportation of waste by either covering trucks or by transporting wastes in enclosed containers;

l   Carry out regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

l   Separate chemical wastes for special handling and disposed of to licensed facility for treatment; and

l   Employ licensed waste collector to collect waste.

 

 

Waste Reduction Measures

 

5.5       Good management and control can prevent the generation of a significant amount of waste.  Waste reduction is best achieved at the planning and design stage, as well as by ensuring the implementation of good site practices. Recommendations to achieve waste reduction include:

 

l   Design foundation works that could minimise the amount of excavated material to be generated;

l   Provide training to workers on the importance of site cleanliness and appropriate waste management procedures, including waste reduction, reuse and recycling;

l   Sort out demolition debris and excavated materials from demolition works to recover reusable/ recyclable portions (i.e. soil, broken concrete, metal etc.);

l   Segregate and store different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal;

l   Encourage the collection of aluminum cans by providing separate labelled bins to enable this waste to be segregated from other general refuse generated by the workforce; and

l   Plan and stock construction materials carefully to minimize the amount of waste to be generated and to avoid unnecessary generation of waste.

 

5.6       In addition to the above measures, specific mitigation measures are recommended below for the identified waste so as to minimise environmental impacts during handling, transportation and disposal of waste.

 

Construction & Demolition Materials

 

5.7       In order to minimise the impact resulting from collection and transportation of C&D material for off-site disposal, the excavated material arising from site formation and foundation works should be reused on-site as backfilling material and for landscaping works as far as practicable. Other mitigation requirements are listed below:

 

l   A WMP, which becomes part of the Environmental Management Plan (EMP), should be prepared in accordance with ETWB TCW No.19/2005;

l   A recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites) should be adopted for easy tracking; and

l   In order to monitor the disposal of excavated and C&D material at public filling facilities and landfills and to control fly-tipping, a trip-ticket system should be adopted (refer to ETWB TCW No. 31/2004).

 

5.8     The Contractor should prepare and implement an EMP in accordance with ETWB TCW No. 19/2005 which describes the arrangements for avoidance, reuse, recovery, recycling, storage, collection, treatment and disposal of different categories of waste to be generated from construction activities. Such a management plan should incorporate site specific factors, such as the designation of areas for segregation and temporary storage of reusable and recyclable materials. The EMP should be submitted to the Supervising Officer (SO) and Supervising Officer’s Representative (SOR) for approval. The Contractor should implement waste management practices in the EMP throughout the construction stage of the Project.  The EMP should be reviewed regularly and updated by the Contractor, preferably on a monthly basis.

 

5.9     All surplus excavated and C&D materials arising from or in connection with works should become the property of the Contractor when it is removed unless otherwise stated. The Contractor would be responsible for devising a system to work for on-site sorting of excavated and C&D materials and promptly removing all sorted and process materials arising from the construction activities to minimize temporary stockpiling on- site. The system should be included in the EMP identifying the source of generation, estimated quantity, arrangement for on-site sorting, collection, temporary storage areas and frequency of collection by recycling Contractors or frequency of removal off-site.

 

Chemical Waste

 

5.10   Should chemical wastes be produced at the construction site, the Contractor would be required to register with EPD as a Chemical Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible with the chemical wastes should be used, and incompatible chemicals should be stored separately. Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste (such as explosive, flammable, oxidizing, irritant, toxic, harmful, or corrosive). The Contractor should employ a licensed collector to transport and dispose of the chemical wastes, to either the CWTC in Tsing Yi, or any other licensed facilities, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

 

General Refuse

 

5.11   General refuse should be stored in enclosed bins or compaction units separated from C&D material. A licensed waste collector should be employed by the contractor to remove general refuse from the site, separately from C&D material. Preferably an enclosed and covered area should be provided to reduce the occurrence of 'windblown' light material.

 

Waste Management and Control During Operation Phase

 

Good Site Practices

 

5.12      It is recommended that the following good operational practices should be adopted to minimise waste management impacts:

 

l   Obtain the necessary waste disposal permits from the appropriate authorities, in accordance with the Waste Disposal Ordinance (Cap. 354), Waste Disposal (Chemical Waste) (General) Regulation and the Land (Miscellaneous Provision) Ordinance (Cap. 28);

l   Nomination of an approved person to be responsible for good site practice, arrangements for collection and effective disposal to an appropriate facility of all wastes generated at the site;

l   Use of a waste haulier licensed to collect specific category of waste;

l   A trip-ticket system should be included as one of the contractual requirements and implemented by the Environmental Team to monitor the disposal of solid wastes at public filling facilities and landfills, and to control fly tipping. Reference should be made to ETWB TCW No. 31/2004.

l   Training of site personnel in proper waste management and chemical waste handling procedures;

l   Separation of chemical wastes for special handling and appropriate treatment at a licensed facility;

l   Routine cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

l   Provision of sufficient waste disposal points and regular collection for disposal;

l   Adoption of appropriate measures to minimize windblown litter and dust during transportation of waste, such as covering trucks or transporting wastes in enclosed containers; and

l   Implementation of a recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites).

 

Waste Reduction Measures

 

5.13      Good management and control can prevent the generation of significant amounts of waste. It is recommended that the following good operational practices should be adopted to ensure waste reduction:

 

l   Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal;

l   Encourage collection of aluminum cans, plastic bottles and packaging material (e.g. carton boxes) and office paper by individual collectors. Separate labelled bins should be provided to help segregate this waste from other general refuse generated by the work force; and

l   Any unused chemicals or those with remaining functional capacity should be reused as far as practicable.

 

Wastes Generated from Pre-Treatment Process

 

5.14   Wastes generated from pre-treatment process should be recycled as far as possible. Wastes generated from pre-treatment process should also be separated from any chemical waste and stored in covered skips. The recyclables should be collected by licensed collectors, while the rest of the waste should be removed from the site on a daily basis to minimise odour, pest and litter impacts. Open burning must be strictly prohibited.

 

 

Chemical Wastes

 

5.15   Chemical waste generated from machinery maintenance and servicing should be managed in accordance with Code of Practice on the Packaging, Labelling and storage of Chemical Wastes under the provisions of Waste Disposal (Chemical Waste) (General) Regulation. The chemical waste should be collected by drum-type containers and removed by licensed chemical waste contractors.

 

5.16   Plant / equipment maintenance schedules should be planned in order to minimize the generation of chemical waste.

 

5.17   Non-recyclable chemical wastes and lubricants should be disposed of at appropriate facilities, such as CWTC. Copies or counterfoils from collection receipts issued by the licensed waste collector should be kept for recording purpose.

 

5.18   Recyclable chemical waste will be transported off-site for treatment by a licensed collector. The Contractor will need to register with EPD as a chemical waste producer. Where possible, chemical wastes (e.g. waste lubricants) would be recycled at appropriate facilities, such as Dunwell’s oil re-refinery.

 

General Refuse

 

5.19   Waste generated in offices should be reduced through segregation and collection of recyclables. To promote the recycling of wastes such as used paper, aluminium cans and plastic bottles, it is recommended that recycling bins should be clearly labelled and placed at locations with easy access. For the collection of recyclable materials, they should be collected by licensed collectors.

 

5.20   General refuse, other than segregated recyclable wastes, should be separated from any chemical waste and stored in covered skips. The general refuse should be removed from the site on a daily basis to minimise odour, pest and litter impacts. Also, open burning of refuse must be strictly prohibited.

 

Approaches to Prevent Land Contamination

 

Fuel Oil Spillage Prevention

 

5.21      Precautionary measures to prevent fuel oil spillage are as follows:

 

(i)       Fuel Oil Containers

 

l   Fuel oil should be stored in suitable containers.

l   All fuel oil containers should be securely closed.

l   Appropriate labels showing the name of fuel oil should be posted on the containers.

l   Drip trays should be provided for all containers.

 

(ii)      Storage Area

 

l   Distance between the fuel oil refuelling points and the fuel oil containers should be minimized.

l   The storage area should be used for fuel oil storage only.

l   No surface water drains or foul sewers should be connected to the storage area.

l   The storage area should be enclosed by three sides by a wall and have an impermeable floor or surface.

 

(iii)     Fuel Oil Spillage Response

 

l An Oil Spill Response Plan should be prepared by the operator to document the appropriate response procedures for oil spillage incidents in detail. General procedures to be taken in case of fuel oil spillage are presented below.

 

¡   Training

 

Training on oil spill response actions should be given to relevant staff.  The training should cover the followings:

 

              Tools & resources to combat oil spillage and fire, e.g. locations of oil spill handling equipment and firefighting equipment;

              General methods to deal with oil spillage and fire incidents;

              Procedures for emergency drills in the event of oil spills and fire; and

              Regular drills should be carried out.

¡   Communication

 

Establish communication channel with the Fire Services Department (FSD) and EPD to report any oil spillage incident so that necessary assistance from relevant department could be quickly sought.

 

¡   Response Procedures

 

Any fuel oil spillage within the Project Site should be immediately reported to the Site Manager with necessary details including location, source, possible cause and extent of the spillage.

Site Manager should immediately attend to the spillage and initiate any appropriate action to confine and clean up the spillage. The response procedures should include the following:

              Identify and isolate the source of spillage as soon as possible.

              Contain the oil spillage and avoid infiltration into soil/ groundwater and discharge to storm water channels.

              Remove the oil spillage.

              Clean up the contaminated area.

              If the oil spillage occurs during refuelling, the refuelling operation should immediately be stopped.

              Recovered contaminated fuel oil and the associated material to remove the spilled oil should be considered as chemical waste. The handling and disposal procedures for chemical wastes are discussed in the following paragraphs.

 

Chemicals and Chemical Wastes Handling & Spillage Prevention

 

5.22        The precautionary measures to prevent improper handling / use of chemicals and chemical waste spillage are presented below:

 

(i)        Chemicals and Chemical Wastes Handling & Storage

 

l   Chemicals and chemical wastes should only be stored in suitable containers in purpose-built areas.

l   The storage of chemical wastes should comply with the requirements of the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

l   The storage areas for chemicals and chemical wastes should have an impermeable floor or surface. The impermeable floor / surface should possess the following properties:

 

¡   Not liable to chemically react with the materials and their containers to be stored.

¡   Able to withstand normal loading and physical damage caused by container handling

¡   The integrity and condition of the impermeable floor or surface should be inspected at regular intervals to ensure that it is satisfactorily maintained

l   For liquid chemicals and chemical wastes storage, the storage area should be bunded to contain at least 110% of the storage capacity of the largest containers or 20% of the total quantity of the chemicals/chemical wastes stored, whichever is the greater.

l   Storage containers should be checked at regular intervals for their structural integrity and to ensure that the caps or fill points are tightly closed.

l   Chemical handling should be conducted by trained workers under supervision.

 

(ii)      Chemicals and Chemical Wastes Spillage Response

 

l   A Chemicals and / or Chemical Wastes Spillage Response Plan should be prepared by the operator to document in detail the appropriate response procedures for chemicals or chemical wastes spillage incidents. General procedures to be undertaken in case of chemicals / chemical waste spillages are presented below:

 

¡   Training

 

Training on spill response actions should be given to relevant staff.  The training should cover the followings:

              Tools & resources to handle spillage, e.g. locations of spill handling equipment;

              General methods to deal with spillage; and

              Procedures for emergency drills in the event of spills.

 

¡   Communication

 

Establish communication channel with Fire Services Department (FSD) and EPD to report the spillage incident so that necessary assistance from relevant department could be quickly sought.

 

¡   Response Procedures

Any spillage within OWTF site should be reported to the Site Manager.

Site Manager shall attend to the spillage and initiate any appropriate actions needed to confine and clean up the spillage. The response procedures should include the followings:

              Identify and isolate the source of spillage as soon as possible;

              Contain the spillage and avoid infiltration into soil / groundwater and discharge to storm water channels (in case the spillage occurs at locations out of the designated storage areas);

              Remove the spillage; the removal method / procedures documented in the Material Safety Data Sheet (MSDS) of the chemicals spilled should be observed;

              Clean up the contaminated area (in case the spillage occurs at locations out of the designated storage areas); and

              The waste arising from the cleanup operation should be considered as chemical wastes.

Incident Record

 

5.23        After any spillage, an incident report should be prepared by the Site Manager. The incident report should contain details of the incident including the cause of the incident, the material spilled and estimated spillage amount, and also the response actions undertaken. The incident record should be kept carefully and able to be retrieved when necessary.

 

5.24        The incident report should provide sufficient details for the evaluation of any environmental impacts due to the spillage and assessment of the effectiveness of measures taken.

 

5.25        In case any spillage or accidents results in significant land contamination, EPD should be informed immediately and the Project operator should be responsible for the cleanup of the affected area.  The responses procedures described in Sections 6.65 - 6.66 of the EIA Report should be followed accordingly together with the land contamination assessment and remediation guidelines stipulated in the Guidance Manual for     Use of  Risk-based Remediation Goals for Contaminated Land Management and the Guidance Note for Contaminated Land Assessment and Remediation.


6 LANDSCAPE AND VISUAL

Introduction

6.1           EM&A for landscape and visual resources shall be undertaken by the Contractor during the design, construction and operation phases of the Project. This section presents the requirements of the baseline review, and the monitoring of the design, implementation and maintenance of the landscape and visual mitigation measures during the design, construction and operation phases of the Project.

 

Baseline Review

 

6.2           A baseline review shall be undertaken prior to the commencement of the construction works. The purposes of the review are as follows:-

 

l   To check the status and any changes of the baseline Landscape Resources, Landscape Character areas and Visually Sensitive Receivers (VSRS) within and immediately adjacent to the works areas;

l   To determine whether amendments in the design of the landscape and visual mitigation measures are required; and

l   To recommend any necessary amendments to the design of the landscape and visual mitigation measures due to the above changes, if any.

 

6.3            Any changes to the mitigation measures that may be recommended as a result of the baseline review shall be taken into account.

 

Mitigation Measures

 

6.4            The landscape and visual impact assessment of the EIA Study recommended a series of mitigation measures to ameliorate the potential landscape and visual impacts of the Project. The measures for both the construction and operation phases as recommended in the EIA Report are summarised in Table 6.1 and Table 6.2.


 

Table 6.1          Proposed   Landscape   and   Visual   Mitigation   Measures   for Construction Phase

 

 

 

ID No.

 

Landscape and Visual Mitigation Measures

 

Funding Agency

 

Implementation Agency

Maintenance/ Management Agency

 

 

 

 

CM1

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

 

 

 

 

EPD

 

 

 

EPD

(via Contractor)

 

 

EPD

(via Contractor)

 

 

CM2

Compensatory tree planting should be provided to compensate for felled trees.

 

 

EPD

 

EPD

(via Contractor)

EPD

(via Contractor)

 

 

CM3

 

 

Control of night-time lighting.

 

 

EPD

 

EPD

(via Contractor)

EPD

(via Contractor)

 

 

CM4

Erection of decorative screen hoarding compatible with the surrounding setting.

 

 

EPD

 

EPD

(via Contractor)

EPD

(via Contractor)

 


Table 6.2      Proposed   Landscape   and   Visual   Mitigation   Measures   for Operation Phase

 

 

 

ID No.

 

Landscape and Visual Mitigation Measures

 

Funding Agency

 

Implementation Agency

Maintenance / Management Agency

 

 

 

 

 

 

OM1

Aesthetic design of the façade, including its colour theme, pattern, texture, materials, finishing, and associated structures to harmonize with the surrounding settings.

 

 

 

 

 

 

EPD

 

 

 

 

EPD

 

(via Contractor)

 

 

 

 

EPD

 

(via Contractor)

 

OM2

Grass/ groundcover