1               INTRODUCTION

Background

1.1           The existing former Cheoy Lee Shipyard at Penny’s Bay will be decommissioned to make room for the construction of infrastructures associated with Hong Kong Disneyland Phase 1, including the Penny’s Bay Section of the Chok Ko Wan Link Road (CKWLR), Road P2 and the water recreation centre, etc. The decommissioning of Cheoy Lee Shipyard (the Project) shall will be on the critical path for the construction of overall timetable of the Master Project Agreement that early completion of the Project is therefore essential to assure the timely opening of the Hong Kong Disneyland Theme Park.

 

1.1            

1.1            

1.2           Main activities associated with the Project are demolition of buildings in Cheoy Lee Shipyard (CLS), excavation of contaminated soil from CLS, off-site soil treatment at a reclaimed land of To Kau Wan (TKW), slope improvement work behind CLS and filling of CLS site after decommissioning. As identified in the Environmental Impact Assessment Report for the Decommissioning of Cheoy Lee Shipyard (hereafter referred to as the EIA), key environmental impacts arising from the Project include air quality impact at the sensitive receiver adjacent to the CLS and TKW sites, local contamination impact at the groundwater recharge point during dewatering, loss of habitats of the restrictedrare/ protected plant species behind CLS and impact to Mong Tung Hang & the potential inhabited rice fish population.

 

 

1.3           In relation to the anticipated environmental impacts of the Project, respective mitigation measures and brief environmental monitoring and audit requirements have been recommended in the EIA report. This Environmental Monitoring and Audit (EM&A) Manual has been prepared in supplement of the EIA report to provide details of the EM&A requirements and the environmental management system activities during the Project.

 

 

Purpose of the Manual

1.4           The purpose of this Manual is to guide the set up of an EM&A programme to ensure compliance with the EIA study recommendations, to assess the effectiveness of the recommended mitigation measures and to identify any further need for additional mitigation measures or remedial action.  This Manual outlines the monitoring and audit programme for the construction/ demolition and remediation phases of the proposed project.  It aims atto providinge systematic procedures for monitoring, auditing and minimising environmental impacts associated with decommissioning works and activities.

 

 

1.5           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).

 

 

1.6           This Manual contains the following information:

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

·       responsibilities of the Contractor, the Engineer or Engineer’s Representative (ER), and Environmental Project Office Team (ENPOET) , and the Independent Environmental Environment Checker (IECIEC) with respect to the environmental monitoring and audit requirements during the course of the project;

·       project organisation and programming of construction activities for the project;

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

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

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

·       the rationale on which the environmental monitoring data will be evaluated and interpreted and the details of the statistical procedures that will be used to interpret the data;

·       definition of Action and Limit levels;

·       establishment of Event and Action plans;

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

·       requirements for presentation of environmental monitoring and audit data and appropriate reporting procedures; and

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

 

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

1.1For the purpose of this manual, the ET leader, who willshall be responsible for and in charge of the ET, shall refer to the person delegated the role of executing the EM&A requirements.

 

Proposed Works

1.8           The Project proposes to decommission the existing CLS at Penny’s Bay in order to make space available for the infrastructure construction in association with the Hong Kong Disneyland Phase 1 development. Key works of the Project comprise:

 

(a)            Demolition of the existing structures within CLS;

(b)           Removal of abandoned equipment/ installation/ facilities and waste materials in CLS;

(c)            Excavation of the contaminated soil in CLS and transportation to the off-site treatment plants at To Kau Wan;

(d)           Installation and operation of the off-site treatment plants;

(e)            Decommissioning of the off-site treatment plants, site re-instatement and associated clean up work

(f)            Slope improving works behind the CLS; and

(g)            Filling of the CLS to a new formation level after decommissioning.;

 

1.1           The Project will be scheduled to commence in mid 2002. The preliminary Project programme is given in Table 1.1.

1.9            

 

Table 1.1      Preliminary Project programme

 

Project Components

Preliminary Working Period

From

To

Demolition & excavation of contaminated soil

July 2002

 March 2003

Operation of on-site soil treatment  plant

November 2002

May 2003

Slope works behind CLS

 July 2002

 December 2003

Preparation of TKW site

 July 2002

 October 2002

Biopile operation at TKW

November 2002

November 2004

Solidification operation at TKW

March 2004 

March 2006

Thermal desorption operation at TKW

 February 2004

 February 2006

Filling of CLS after decommissioning

 October 2002

 July 2003

TKW decommissioning

February 2006

July 2006

 

1.10        The layout of the work sites is shown in Figure 1.1. Air quality, water quality and ecological sensitive receivers that may be affected by the Project have been identified in the EIA report. They are shown in Figures 1.2 to 1.54.

 

 

 

Objectives of the Environmental Monitoring and Audit

1.11        The main objectives of the EM&A programme are:

 

·       to provide a database against which any short or long term environmental impacts of the project can be determined;

·       to provide an early indication should any of the environmental control measures or practices fail to achieve the acceptable standards;

·       to monitor the performance of the project and the effectiveness of mitigation measures;

·       to verify the environmental impacts predicted in the EIA Study;

·       to determine project compliance with regulatory requirements, standards and government policies;

·       to take remedial action if unexpected problems or unacceptable impacts arise; and

·       to provide data against which environmental audits may be undertaken.

 

 

2               ENVIRONMENTAL MANAGEMENT SYSTEM

Introduction

2.1           This section sets out the proposed environmental management system approaches that will be implemented to ensure that the recommendations of the EIA are fully and effectively implemented during the Project.

 

General

2.2           The EIA Report provides an assessment of the predicted scope and extent of likely impacts resulting from the decommissioning of the CLS and soil remediation work at TKW. Mitigation recommendations have been specified to ensure that the environmental quality objectives are met. The recommended mitigation measures from the EIA Report are summarised in the form of an Implementation Schedule (IS) (Appendix A).

 

2.3           An integral part of these recommendations is the requirement to undertake an EM&A process to verify the level of environmental performance achieved and the effectiveness of the recommended mitigation measures.

 

The EM&A Manual

2.4           The EM&A Manual outlines the monitoring & auditing protocols which will be necessary to achieve the objective of the EM&A programme.  Implementation of the EM&A programme and the EM&A data will reflect the Project’s compliance of the environmental quality standard. It also serves as a feedback to the Contractor, Civil Engineering Department (CED,  (the Project Proponent), and the Environmental Protection Department (EPD) in determining iftelling if the existing mitigation measures are adequate.

 

2.5           The EM&A Manual is a dynamic document that will be reviewed and updated, where necessary upon commencement of the Project.

 

Contractual Documentation

2.6           In order to ensure that Contractor implement the recommended mitigation measures upon the Project commencement, the contract specifications shall include clauses related to compliance with the appropriately recommended mitigation measures/environmental monitoring requirements. In addition, the contract specifications shall define appropriate contractual mechanisms to ensure compliance with these environmental requirements.

 

2.7           The contractual documentation shall require the Contractor to prepare, implement and maintain an Environmental Management Plan (EMP).

 

 

Revision of EM&A Manual

2.8           It should be noted that this EM&A Manual has been prepared during the design phase of the Project and shall be reviewed and updated in accordance with any conditions or requirements stipulated in the future Environmental Permit.

 

2.9           Upon the Project commencement where the ENPO system is in place, updating and maintaining this EM&A Manual shall be done by the ENPO. Alternatively, the ET Leader shall take up the responsibility.

1.1Upon the Project commencement where the ENPO system has been is in place, updating and maintaining this EM&A Manual shall be done by the ENPO. Alternatively, the ET Leader shall take up the responsibility.

 

Environmental Management Plans

2.10        In order to ensure the effective contract specific implementation and reporting on compliance with the stated mitigation measures, as well as the monitoring and auditing requirements and remedial actions defined in the EIA Report, an appropriate contractual and supervisory framework shall be established. Upon commencement of the Project, the Contractor shall prepare an Environmental Management Plan (EMP) that shall form the framework within which the implementation of mitigation measures and good site practices are to be managed.

 

2.11        An EMP is similar in nature to a quality plan and provides details of the means by which the Contractor (and all subcontractor working to the Contractor) shall implement the recommended mitigation measures and achieve the environmental performance standards defined in Hong Kong environmental legislation, the Contract and in the EIA documentation. The primary reason for adopting the EMP approach is to make the Contractor aware of his environmental responsibilities and to be pro-active about the commitment to achieve the standards specified, rather than relying on the EM&A programme.

 

2.12        The EMP also provides opportunities for the Contractor to draw upon the strength of other institutional processes such as ISO 9000/14000 to ensure that the achievement of the required standards and fulfilment of commitments are documented.

 

2.13        The provision of an EMP shall be a contractual requirement, and the EMP needs to be approved by the Engineer following verification fromorm  the IECEATLIEC.

 

2.14        The contractual requirement for an EMP generally comprises appropriate extracts from (and references to) the Project EIA Report and EM&A Manual, and include such typical elements as the relevant statutory environmental standards, general environmental control clauses and specific environmental management clauses, as well as an outline of the scope and content of the EMP. In drafting the documentation, due consideration should be given to the predictive nature of the EIA process and the consequent need to manage and accommodate the actual impacts arising from the construction process. In particular, the Contractor must be placed under a clear obligation to identify and control any implications arising from changes to the working methods assumed in the EIA Report, or to the progress rates and other estimates made during the preliminary design phase.

 

Environmental Performance Reviews

2.15        The environmental performance review programme comprises the regular assessment of the effectiveness of the EMP, site practices and procedures to ensure that the required mitigation measures are routinely implemented and that they are being effective in achieving the required environmental standards.

 

2.16        The criteria of the reviews shall be derived from the following:

·       the approaches, procedures and commitments given by the Contractor in their EMP;

·       the clauses contained within the Contractor’ Contractual Documentation; and

·       those parts of the Contractor’ method statements which relate to the minimisation of environmental impacts or other specified environmental protection measures.

 

2.17        The reviews shall focus on the effectiveness of the implemented measures to achieve the purpose, not simply the fact that a measure has been implemented.

 

2.18        Review protocols shall be developed by the ETEMTET Leader prior to the commencement of works and it is suggested that the protocols should include inspection and auditing of the following:

·       the allocation of responsibility for fulfilling environmental requirements, and agreed mitigation measures, and the effectiveness of lines of communication with regard to environmental issues;

·       compliance with procedures established to enable an effective response to environmental incidents, exceedances or non-compliance;

·       the extent and accuracy of record-keeping related to environmental performance indicators;

·       the effectiveness of staff training in ensuring high levels of awareness with regard to environmental requirements; and

·       the effectiveness of environmental management activities.

 

2.19        The protocols shall comprise checklists of environmental requirements and shall be amended, throughout the construction phase as necessary, to focus on areas of frequent non-compliance and to reflect the potential impacts associated with specific activities within the construction programme.

 

Construction Method Statement

2.20        It is common practice for the Contractor to submit details of forthcoming works to the Engineer to seek approval for the commencement of the works as well as the methodology and equipment proposed to be used.

 

2.21        The ETEMTET Leader shall comment on deviations of the specific works from that assumed in the Project EIA and advise on the implications of the changes in construction methods for achieving the environmental performance criteria set out in the EIA documentation and the EMP.

 

2.22        This ongoing requirement for the Contractor to review proposed working methods, in terms of their potential to impact upon the environment, will reduce the time taken to implement the necessary environmental control measures and reduce the number of iterations a measure may have to go through before becoming effective.

 

2.23        Any changes in construction methods shall be reflected in a revised EMP or the Contractor is required to demonstrate the manner in which the existing EMP shall accommodate the proposed changes.

 

3               ORGANISATION AND STRUCTURE OF THE EM&A

Introduction

3.1           In this Section, the various parties involved in the EM&A process are outlined and the proposed organisational structure of the organisations responsible implementing the EM&A programme and their key responsibilities are presented. Furthermore an alternative organisational structure is presented with reference to the fact that a number of the construction contracts may be undertaken concurrently in the future.

 

Project Organisation

3.2           The roles and responsibilities of the various parties involved in the construction phase EM&A process outlined above are further expanded upon in the following sections. The organisation and lines of communication with respect to environmental works are shown in Figure 3.1.

 

3.3           The duties and responsibilities of respective parties are as follows:

 

The Contractor:

·       employ an Environmental Team (ET) to undertake monitoring, laboratory analysis and reporting of environmental monitoring and audit;

·       provide assistance to ET in carrying out monitoring;

·       submit proposals on mitigation measures in case of exceedances of Action and Limit levels in accordance with the Event and Action Plans;

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

·       adhere to the procedures for carrying out complaint investigation.

 

Environmental Team:

·       monitor various environmental parameters as required in the EM&A Manual;

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

·       carry out site inspection to investigate and audit the Contractors' site practice, equipment and work methodologies with respect to pollution control and environmental mitigation, and effect proactive action to pre-empt problems;

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

·       report on the environmental monitoring and audit results to the IEC, Contractor, the ER and EPD or its delegated representative;

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

·       adhere to the procedures for carrying out complaint investigation.

 

Engineer or Engineer’s Representative:

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

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

·       employ an IEC to audit the results of the EM&A works carried out by the ET; and

·       adhere to the procedures for carrying out complaint.

 

Independent Environmental Checker:

·       review the EM&A works performed by the ET (at not less than monthly intervals);

·       audit the monitoring activities and results (at not less than monthly intervals);

·       report the audit results to the ER and EPD in parallel;

·       review the EM&A reports (monthly and quarterly summary reports) submitted by the ET;

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

·       adhere to the procedures for carrying out complaint.

Environmental Project Office (ENPO)

Environmental  Monitoring Team

1.1Within the ENPO, an Environmental Monitoring Team (EMT) shall be appointed to undertake all the environmental monitoring requirements for each of the proposed construction contracts. An Environmental Monitoring Team Leader (EMTL) shall be appointed to plan and organise the implementation of the environmental monitoring programme, and to ensure that the environmental monitoring is undertaken to the required standards. The main objectives of the EMT will be to:

 

·to monitor the various environmental parameters as required by this or subsequent revisions to the EM&A Manual; and

·to adhere to the agreed protocols or those in the Contract Specifications in the event of exceedances or complaints.

 

Environmental Auditing Team Leader

1.1Within the ENPO, an Environmental Auditing Team Leader (EATL) shall be appointed to independently audit and interpret the monitoring data obtained by the EMT. The EATL shall also be responsible for undertaking site audits/inspections to verify the overall environmental performance of the works, and for assessing the effectiveness of the EMT in their duties.  The main objectives of the EATL will be to:

 

·assess the EM&A data and review the success of the EM&A programme determining the adequacy of the mitigation measures implemented and the validity of the EIA predictions as well as identify any adverse environmental impacts before they arise;

·to review and audit the environmental monitoring data obtained by the EMT;

·arrange and conduct regular site inspections and to investigate and inspect the Contractors’ equipment and work methodologies with respect to pollution control and environmental mitigation, and to anticipate environmental issues that may require mitigation before the problem arises;

·to report to the Engineer, the EPD and the Client regarding the environmental monitoring and audit results and, in particular, on compliance with the agreed environmental criteria, and on the general site environmental conditions and the implementation of mitigation measures resulting from site inspections; and

·provide specialist advice to the Engineer and/or the Client on environmental matters.

 

1.1Whilst the members of the ENPO Team must be suitably empowered in order to be effective in their role, it is not envisaged that they will have the power to give instructions directly to the Contractors. Any instructions to effect change or to stop the construction Works must be made through the Engineer.

 

 

The Contractor:

1.1Reporting to the Engineer, the Contractors shall:

 

·work within the scope of the construction contract and other tender conditions;

·participate in the site inspections undertaken by the EATL, as required, and undertake any corrective actions instructed by the Engineer;

·provide information/advice to the EATL regarding works activities which may contribute, or be contributing to the generation of adverse environmental conditions;

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

·take responsibility and strictly adhere to the guidelines of the EM&A programme and complementary protocols developed by their project staff.

·employ an Environmental Team (ET) to undertake monitoring, laboratory analysis and reporting of environmental monitoring and audit;

·provide assistance to ET in carrying out monitoring;

·submit proposals on mitigation measures in case of exceedances of Action and Limit levels in accordance with the Event and Action Plans;

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

·adhere to the procedures for carrying out complaint investigation in accordance with Section 6.3.

 

Environmental Team:

·monitor various environmental parameters as required in the EM&A Manual;

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

·carry out site inspection to investigate and audit the Contractors' site practice, equipment and work methodologies with respect to pollution control and environmental mitigation, and effect proactive action to pre-empt problems;

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

·report on the environmental monitoring and audit results to the IECIEC, Contractor, the ER and EPD or its delegated representative;

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

·adhere to the procedures for carrying out complaint investigation.

 

Engineer or Engineer’s Representative:

1.1The term Engineer, or Engineers Representative (ER), refers to the organisation responsible for overseeing the construction works and for ensuring that they are undertaken by the Contractors in accordance with the specification and Contractual requirements. The ER shall:

 

·monitor the Contractors’ compliance with contract specifications, including the effective implementation and operation of environmental mitigation measures and other aspects of the EM&A programme;

·comply with the agreed Event and Action Plan in the event of any exceedance;

·liaise with the ENPO and assist as necessary in the implementation of the environmental monitoring and auditing programme; and

·instruct the Contractors to follow the agreed protocols or those in the Contract Specifications in the event of exceedances or complaints.

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

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

·employ an IECIEC to audit the results of the EM&A works carried out by the ET; and

·adhere to the procedures for carrying out complaint investigation in accordance with Section 6.3.

 

Independent Environmental Environment Checker):

·review the EM&A works performed by the ET (at not less than monthly intervals);

·audit the monitoring activities and results (at not less than monthly intervals);

·report the audit results to the ER and EPD in parallel;

·review the EM&A reports (monthly and quarterly summary reports) submitted by the ET;

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

·adhere to the procedures for carrying out complaint.

 

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

 

 

 

4               EM&A GENERAL REQUIREMENT

Introduction

4.1           In this Section, the general requirements of the EM&A programme for the Project are presented with reference to the relevant findings from the EIA Report that have formed the basis of the scope and content of the programme.  .

Although not included within the scope of the original Study Brief issued by the EPD for the Theme Park and associated developments, a review has been undertaken to determine whether there are likely to be any potential land contamination impacts as a result of the Project’s implementation.  As no contamination concerns have been identified for the Schedule 2 Designated Projects that have been considered within this EIA Report, no specific environmental monitoring  and auditing activities have been recommended.

 

 

General

4.2           The environmental issues, which were identified during the EIA process and are associated with the decommissioning of the CLS have been addressed through the monitoring and controls specified in this EM&A Manual and in the decommissioning contracts.

 

4.3           During the demolition and remediation phases of the Project, air quality, water quality, groundwater recharging, waste arising and terrestrial ecology shall be subject to EM&A, with environmental monitoring being undertaken for air quality, groundwater recharging and terrestrial ecology as per the EIA.

 

4.4           The monitoring of the effectiveness of the mitigation measures will be achieved through the environmental monitoring programme as well as through site inspections. The inspections shall include within their scope, mechanisms to review and assess the Contractor’ environmental performance, ensuring that the recommended mitigation measures have been properly implemented, and that the timely resolution of received complaints are managed and controlled in a manner consistent with the recommendations of the EIA Report.

 

Environmental Monitoring

1.1           The environmental monitoring work throughout the Project period shall be carried out by the ET; the monitoring workETEMTET. Monitoring works shall comprise theof quantitative assessment of physical parameters such as air quality impacts;at representative sensitive receivers in the vicinity of theworks, together with the assessment of possible impact from groundwater recharge and terrestrial ecology impacts also forms an important part of the whole monitoring programme. Monitoring programme shall be conducted at chosen representative sensitive receivers in the vicinity of the CLS and TKW.impacts.

4.5            

.

Action and Limit Levels

4.6           Action and Limit (A/L) Levels are defined levels of impact recorded by the environmental monitoring activities which represent levels at which a prescribed response is required. These Levels are quantitatively defined later in the relevant sections of this manual and described in principle below:

 

·       Action Limits: beyond which there is a clear indication of a deteriorating ambient environment for which appropriate remedial actions are likely to be necessary to prevent environmental quality from falling outside the Limit Levels, which would be unacceptable; and

·       Limit Levels: statutory and/or agreed contract limits stipulated in the relevant pollution control ordinances, HKPSG or Environmental Quality Objectives established by the EPD. If these are exceeded, works should not proceed without appropriate remedial action, including a critical review of plant and working methods.

 

Event and Action Plans

4.7           The purpose of the Event and Action Plans (EAPs) is to provide, in association with the monitoring and audit activities, procedures for ensuring that if any significant environmental incident (either accidental or through inadequate implementation of mitigation measures on the part of the Contractor) does occur, the cause will be quickly identified and remediated, and the risk of a similar event recurring is reduced. This also applies to the exceedances of A/L criteria identified in the EM&A programme.

 

Site Inspections

4.8           In addition, to monitoring noise, air and water quality levels as a means of assessing the ongoing performance of the Contractor, the ETEMTET shall undertake regular site inspections and audits of on-site practices and procedures. The primary objective of the inspection and audit programme will be to assess the effectiveness of the environmental controls established by the Contractor and the implementation of the environmental mitigation measures recommended in the EIA Report.

 

4.9           Whilst the audit and inspection programme will undoubtedly complement the monitoring activity with regard to the effectiveness of dust suppression, noise attenuation measures and water quality control, the criteria against which the audits shall be undertaken shall be derived from the clauses within the Contract Documents which seek to enforce the recommendations of the EIA Report and the established management systems.

 

4.10        The findings of site inspections and audits shall be made known to the Contractor at the time of the inspection to enable the rapid resolution of identified non-compliances. Non-compliances, and the corrective actions undertaken, shall also be reported in the monthly EM&A Reports.

 

4.11        Section 10 of this Manual presents details of the scope and frequency of on-site inspections and defines the range of issues that the audit protocols shall be designed to address.

 

Enquiries, Complaints and Requests for Information

4.12        Enquiries, complaints and requests for information can be expected from a wide range of individuals and organisations including members of the public, Government departments, the press and television media and community groups.

 

4.13        All enquiries concerning the environmental effects of the construction works, irrespective of how they are received, shall be reported to the Engineer and via the Contractor directed to the ETEMTET which shall set up procedures for the handling, investigation and storage of such information.

 

1.1        For complaints the event and action plan can be found in Appendix B indicating the roles and responsibilities of all parties involved.

 

4.14        In all cases the complainant shall be notified of the findings, and audit procedures shall be put in place to minimise the change of reoccurrence of the problem.

 

Reporting

4.15        Monthly, annual and bi-annual reports shall be prepared and certified by the ETEMTET and verified by the IECEATLIEC. These reports shall be submitted to the Engineer and EPD. The monthly reports shall be prepared and submitted within 2 weeks of the end of each calendar month.

 

Cessation of EM&A

4.16        The ETEMTET shall continue to carry out environmental monitoring and site inspections until the completion of the Project works.  The cessation of EM&A programme is subject to the satisfactory completion of the EM&A Final Review Report.

 

 

5               LAND CONTAMINATION

IntroductionLand Contamination

5.1           EM&A requirements for the secondary impacts, such as of air and water quality, arising from the remediation work have been addressed elsewhere in this Manuale EIA report.  In The soil our remedial proposal has recommended, we recommend excavatingon  the contaminated soil at CLS and on-site and/or off-site treatment of soil.  The contaminated soil shall will be separated from the soil system, hence no monitoring for soil and groundwater at CLS is required.   The progress monitoring of soil treatment progress system is to gauge gauge the effectiveness of the remedial systems, a purpose other than environmental impacts and would not be included in the scope of EM&A.

 

5.2           Whenever the dewatering is needed during excavation, the groundwater shall be recharged within 10m of the extraction point and below the water table.  Regular monitoring of groundwater level at the recharge point and the proximate locations is recommended to ensure insignificant migration of contaminant in groundwater or soils due to the locally risen groundwater level.

 

5.3           TPH free product was encountered during the site investigation in one monitoring well in Building D (located at Area 1 of the CLS site).  It has been recommended in the EIA Report that any free product encountered during excavation at Building D (or other areas of the CLS site) shall be skimmed, containerised and collected by a licensed chemical waste collector for final disposal.  In this regard, it has also been recommended in the EIA Report that monitoring and confirmation sampling/tes/testitnging be carried out to ensure complete removal of any free product encountered during excavation.

 

5.4           In addition, it has been recommended in the EIA Report that confirmation sampling/testing shall be carried out for: (ii) soil  complete soil excavation (to ensure complete excavation of  of of contaminated soil),; (ii) biopile treatment (to ensure completeattainment of cleanup targets); (iii) solidification (to ensure attainment of cleanup targets); and (iv) thermal desorption process (to ensure attainment of cleanup targets).    

 

Groundwater Recharge during Excavation

Monitoring Requirements

Groundwater Recharge during Excavation

5.5           Where the dewatering is needed during excavation, the groundwater shall be recharged within 10m of the extraction point and below the water table.  It is recommended that during dewatering groundwater level shall be monitored at five locations, viz. one (i(1)) at the recharge point; one (1ii) at 5m down-gradient to the recharge point along the direction aligning the groundwater extraction point centre of the excavation area and the recharge point; and three (3iii) at 5m from the up-gradient to the recharge point in other 3 along the directions. aligning the centre of excavation area and the recharge point; (iv) at 5m down-gradient to the recharge point along the direction perpendicular to the alignment of the first 3 locations; and (v) at 5m up-gradient to the recharge point along the direction perpendicular to the alignment of the first 3 locations. The schematic arrangement of the five monitoring locations is given in Figure 5.1.

 

 

5.6           Baseline groundwater levels at eachvery monitoring locations shall be measured at the beginning of working day and before any recharge.  Where there is heavy rain, the baseline monitoring shall be undertaken 1 or 2 days after the last rainy day.  Regular monitoring of groundwater level at the five locations is recommended to ensure insignificant migration of contaminant in groundwater or soils due to the locally risen groundwater level.  The frequency of the monitoring is recommended to be every 5 minutes in the first hour and every hour afterwards.

 

Compliance Assessment and Event/Action Plan

5.7           The purpose of the groundwater level monitoring is to detect any likelihood of migration of soil contaminants due to the locally risen groundwater level by the recharge. Should the likelihood of migration be evident, followings be observed, the groundwater recharge needs to be reduced in flow rate or to be suspended.  The event and action plan is suggested in Table 5.1.

 

Table 5.1      Event and Action Plan for the Groundwater Level Monitoring during Groundwater Recharge

Event

Action

Action Party

1.     During recharge, the rise of groundwater level with reference to the baseline at recharge point EXCEEDS 1 metre.

 

i)       The recharge rate shall be reduced, AND/ OR

ii)     The recharge shall be suspended until the groundwater level at recharge point falls back to less than 1m difference with the baseline.

Contractor

2.     The level difference between recharge point and the monitoring location to the direction of extraction point is SMALLER than those between recharge point and the other 3 monitoring locations.

The recharge shall be suspended and the recharge point shall be reviewed of its suitability by the ET in consultation with the IEC.

Contractor

 

 

Free Product Removal of Free Product Encountered during Excavation

Monitoring and Confirmation Sampling /Testing Requirements

5.8           Where TPH free product is encountered at groundwater surrface during ing eat excavation  excavation at Building D or other areas within the CLS site, the free product shall be skimmed off manually.  The skimmed free product shall then be drummedcontainerised properly and collected by a licensed chemical waste collector.

 

5.9           Skimming of free product shall continue until there is no detectable no free product on the groundwater surface.  (   can be detected by an The usual detection limit of an oil/water interface probe (withwith a usual detection limit of aboutis 1.5mm).  At that time, a confirmation sample of groundwater shall be collected at the surface of the groundwater and analysed for TPH by a laboratory accredited by the Hong Kong Laboratory Accreditation Scheme (HOKLAS).  If 

 

Compliance Assessment and Event/Action Plan

5.10        Removal of all encountered TPH free product is considered complete when: (ii) there is no detectable free product present on the surface of the groundwater whenre free product has been encountered and (ii) the TPH concentration of the confirmation sample is below 2.13E+02 mg/L (whichtheallowable"” TPH concentration derived from risk-based assessment in the EIA Report).  The eventSkimming of free product shall be continued until all encountered free product has been removed.  The event and action plan for the removal of TPH encountered free product is given in Table 5.2.

 

Table 5.2      Event and Action Plan for Removal of Encountered Free Product during Excavation

Event

Action

Action Party

Detectable Ffree product is present on the surface of groundwater at excavated area(s) where free product has been encountered during excavation.  (The usual detection limit of an oil/water interface probe is 1.5mm.)  The thick

 

Skimming of free product shall be continued until no detectable free product is present on the groundwater surface.

ContractorSkimming of free product shall be continuedcontinued.

 

 and until  free procut until no detectable free product is present on the groundwater surface.

TPH concentration in the confirmation groundwater sample is higher than 2.13E+02 mg/L (allowable” TPH concentration derived from risk-based assessment in the EIA Report).the a

Skimming of free product shall be continued until the TPH concentration in the confirmation groundwater sample is below 2.13E+02 mg/L.

 

 

Contractorthe below the

 

 

 

Confirmation Sampling /Testing  for Soil Excavation

Sampling and Testing Requirements

1.1for aes undertakenshave beenThe confirmaition samples shall be analysed for the chemicals that exceedanceed the action levels for soil remediation.      If the anly.

1.1 

1.1both

Com

1.1aof the confirmation samples the   The event and action plan for confirmation sampling for soil excavation is provided in Table 5.3.

 

Table 5.3                                                                                                                                                                                       Event and Action Plan for Confirmation Sampling / Testing for Soil Excavation

 

 

 

i).

 

i)A

 

 

 

1.1Biopile TreatmentConfirmation samples shall be collected with sampling frequency of Oconfirmation shall be collected forone sample everyperThesamples shall be collected at representative locations evenly distributed evenly throughout the biopiles and at various dpeths within the biopiles.   Sample locations within the biopiles shall be documented accurately so that the analytical results can be correlated with locations within the biopile..

1.1 

1.1 

4Biopile Treatment Confirmation Sampling /Testing for Soil Excavation

Sampling and Testing Requirements

5.11        After excavation, confirmation samples shall be undertaken at limits of excavation to confirm that all contaminated soils have been excavated.  The confirmation samples shall be analyse by an HOKLAS accredited laboratory for the chemicals that exceeded the action level for soil remediation. 

 

5.12        For small excavation areas (i.e. measure approximately 10m by 10m in size), one confirmation sample shall be collected from the base and one from each sidewall of the excavation.  The depth of sampling shall be based on the depth of the original SI sample result that triggered excavation in that area.  If SI samples from multiple depths exceeded action levels and triggered excavation, confirmation samples shall be collected for each depth where a sample exceeded these values.  Furthermore, if there are any visible indications of impact, samples shall be collected from the apparent impact zone(s).

 

5.13        For larger excavation areas, confirmation samples shall be collected from sidewalls of the excavation with a lateral spacing of not more than 15m.  At least one confirmation sample shall be collected from each sidewall.  Depth of sidewall samples shall be based on the depth of the original SI sample result that triggered excavation in that area.  If SI samples from multiple depths exceeded action levels and triggered excavation, confirmation samples shall be collected for each depth where a sample exceeded these values.  Confirmation samples from the base of larger excavation areas shall be collected on a grid spacing not larger than 15m by 15m (i.e. one sample per approximately every 225m2).  In both cases, if there are any visible indications of impact, samples shall be collected from the apparent impact zone(s).

 

Compliance Assessment and Event/Action Plan

5.14        If the analytical results of the confirmation samples are below the concerned action levels for soil remediation, removal of the contaminated soil shall be considered complete.  If the analytical results exceed the relevant action levels, more soil shall be excavated either laterally or vertically depending on whether the exceeding confirmation sample is from a sidewall or excavation base, and additional confirmation samples shall be collected and analysed until all confirmation samples are below the relevant action levels.  The event and action plan for confirmation sampling/testing for soil excavation is provided in Table 5.3.

 

Table 5.3      Event and Action Plan for Confirmation Sampling/Testing for Soil Excavation

Event

Action

Action Party

The concentration of the chemical(s) that triggered the excavation exceed the relevant action levels for soil remediation (as tabulated in Table 5.7).

i)               More soil shall be excavated either laterally or vertically depending on whether the exceeding confirmation sample is from a sidewall or excavation base.

 

ii)    Additional confirmation samples shall be collected and analysed until all confirmation samples are below the relevant action levels.

Contractor

 

 

 

 

 

Contractor

 

Confirmation Sampling/Testing for Biopile Treatment

Sampling and Testing Requirements

5.15        The objective of the biopile closure assessment is to collect soil samples for testing in order to ensure that the soil contaminant levels in the biopiles are below the cleanup targets for TPH and SVOCs.  Furthermore, for soil to be treated subsequently by cement solidification, the levels of the concerned metals will also be analysed to provide the baseline conditions.

 

5.16        Confirmation samples shall be collected with sampling frequency of one sample per 100m3 soil treated.  The samples shall be collected at representative locations distributed evenly throughout the biopile and at various depths within the biopile.  Sample locations within the biopile shall be documented accurately so that the analytical results can be correlated with locations within the biopile.

 

5.17        Access to the sampling locations shall be through opening of heat bonded cover panels.  These openings shall be closed after each access.  Extracting the soil samples shall be accomplished using a hand auger or other methods approved by the Engineer.

 

5.18        All soil samples shall be analysed in an HOKLAS accredited laboratory for TPH (USEPA Method 8015 Mod), SVOCs (USEPA Method 8270C) and the concerned metals (USEPA Method 9010B/9012A for total cyanide; USEPA Method 7199 for hexavalent chromium; and USEPA Method 6010B for other metals).

 

Compliance Assessment and Event/Action Plan

5.19        The laboratory results are considered satisfactory when the levels of TPH and SVOCs in 95% of the samples meet the cleanup targets.  This acceptability of 95% serves to allow for laboratory error for soil analysis.  In the event that more than 5% of the samples still exceed any cleanup targets, the biopile decontamination system shall have to be restarted to fully remediate the soil.  The event and action plan for confirmation sampling/testing for biopile treatment is given in Table 5.4.

 

Table 5.4      Event and Action Plan for Confirmation Sampling/Testing for Biopile Treatment

Event

Action

Action Party

More than 5% of the samples still exceed the respective cleanup targets for soil remediation (as tabulated in Table 5.7).

Biopile decontamination system shall have to be restarted to fully remediate the soil

Contractor

 

Confirmation Sampling/Testing for Solidification Treatment

Sampling and Testing Requirements

5.20        Following solidification treatment for metal-contaminated soil and curing of the solidified soil, confirmation sampling/testing shall be undertaken to ensure that the cleanup targets have been attained.

 

5.21        Confirmation samples shall be collected with sampling frequency of one sample per 100m3 of treated material.  Each sample shall be a composite sample collected at 5 locations throughout the treated soil pile, and the same volume of sample shall be collected at each of the locations so that the composite sample is not biased. 

 

5.22        Confirmation samples shall be analysed in an HOKLAS accredited laboratory for the concerned soluble metals using Toxicity Characteristics Leaching Procedure (TCLP) in accordance with USEPA Method 1311.

 

5.23        In order to ensure the soil will be solidified in the solidification process, all the soil treated with solidification/stabilisation shall be tested for unconfined compressive strength.  All the treated soil shall have unconfined compressive strength of at least 150 pound-force per square inch (psi), with reference to USEPA guideline (USEPA 1986) for hazardous waste solidification requirement.

 

Compliance Assessment and Event/Action Plan

5.24        The “Universal Treatment Standards” (UTS) shall be used for interpretation of the TCLP test results to assess if the cleanup targets have been attained.

 

5.25        If either the cleanup targets or the target unconfined compressive strength have been achieved, the treated material shall be crushed and returned to the solidification process.  The event and action plan for confirmation sampling/testing for solidification treatment is given in Table 5.5.

Table 5.5      Event and Action Plan for Confirmation Sampling/Testing for Solidification Treatment

Event

Action

Action Party

Respective cleanup targets (as tabulated in Table 5.7) of any confirmation samples have not been attained.

The treated material shall be crushed and returned to the solidification until the respective cleanup targets have been achieved. 

Contractor

Unconfined compressive strength of 150 pound-force per square inch (psi) has not been attained for all confirmation samples.

The treated material shall be crushed and returned to the solidification until the respective cleanup targets have been achieved. 

Contractor

 

Confirmation Sampling/Testing for Thermal Desorption Treatment

Sampling and Testing Requirements

5.26        Following thermal treatment, confirmation sampling/testing shall be undertaken to confirm that the dioxin-contaminated soil has been treated to the cleanup target.

 

5.27        Initially, the sampling frequency shall be 1 sample per 50m3 of treated soil.  Following the establishment of acceptable system performance, we propose to collect one composite sample per day to ensure the predefined cleanup objective is achieved.  The composite is made up from samples collected every 4 hours so that the composite is representative of the entire day’s performance.  Subject to the soil feed rate, the sampling frequency shall be either one composite sample per day or 1 sample per 100m3, whichever is more frequent.

 

5.28        The confirmation samples shall be analysed for dioxins (USPEA Method 8280A or 8290) and the concerned metals (USEPA Method 9010B/9012A for total cyanide; USEPA Method 7199 for hexavalent chromium; and USEPA Method 6010B for other metals).

 

Compliance Assessment and Event/Action Plan

5.29        If the dioxin concentration of all confirmation samples is below the cleanup target for dioxin (1 ppb TEQ), the treated soil having metals concentrations exceeding the action levels for soil remediation shall be subsequently treated using solidification.  If the cleanup target of dioxins is exceeded, the whole batch of treated soil discharged by the thermal desorption unit since the last confirmation sample achieving the cleanup target shall be re-treated until the clean up target is met.

 

Table 5.6      Event and Action Plan for Confirmation Sampling/Testing for Thermal Desorption Treatment

Event

Action

Action Party

The cleanup target of 1 ppb TEQ for dioxins is not achieved for any confirmation sample.

The whole batch of treated soil discharged by the thermal desorption unit since the last confirmation sample achieving the cleanup target shall be re-treated until the clean up target is met

Contractor

 

 

Table 5.7      Concerned Action Levels and Cleanup Targets for Soil Remediation

Item

Parameter

Action Level (mg/kg or otherwise specified)

Cleanup Target (mg/kg or otherwise specified)

1

Carbon Chain C6-C10TPH

1000 (total)

1000 (total)

2

Arsenic

30

5 (mg/L as TCLP)

3

Barium

400

21 (mg/L as TCLP)

4

Cadmium

5

0.11 (mg/L as TCLP)

5

Chromium (total)

250

0.6 (mg/L as TCLP)

6

Cobalt

50

Not available

7

Copper

100

7.8 (mg/L as TCLP)

8

Lead

150

0.75 (mg/L as TCLP)

9

Nickel

100

11 (mg/L as TCLP)

10

Molybdenum

40

Not available

11

Tin

50

Not available

12

Zinc

500

4.3 (mg/L as TCLP)

13

Cyanide (total)

50

590 (mg/L as TCLP)

14

Phenol

1

1

15

Styrene

5

5

16

Naphthalene

5

5

17

Benzo(a)pyrene (1,2-benzopyrene)

1

1

18

Aroclor-1016Total PCB

1 (total)

1 (total)

19

Hexachlorobenzene

0.4

0.4

20

Benzo(a)anthracene

0.9

0.9

21

Bis(2-ethylhexyl)phthalate

46

46

22

Benzo(b)fluoranthene

0.9

0.9

23

Indeno(1,2,3-cd)pyrene

0.9

0.9

24

Dibenz(a,h)anthracene

0.09

0.09

25

Antimony

31

1.15 (mg/L as TCLP)

26

Hexavalent Chromium

270

Not available

27

Dioxins (2,3,7,8-TCDD equivalent)

0.001

0.001

 

 

  "  the "allowable  during ex no free product Completed The purpose of the during  C    .  The



1               shall be suspended.

1               The groundwater level at recharge point is noted higher than any up-gradient monitoring stations; AND

1               The groundwater level at recharge point has risen to the contamination soil layer.

1                

1                

1               Air Quality Monitoring

6               AAIR QUALITY MONITORING

Introduction

THE TEXT IN THE FOLLOWING SECTIONS IS CURRENT AND CORRECT AS OF 14 FEBRUARY 2000.  HOWEVER, AS THE EIA REPORT IS BEING PREPARED AND REVISED IN PARALLEL WITH THIS EM&A MANUAL, THERE IS THE POSSIBLILITY THAT THIS TEXT MAY NOT BE TOTALLY CONSISTENT WITH THAT IN THE LATEST VERSION OF THE EIA REPORT. HOWEVER, THE FINAL VERSION OF THIS EM&A MANUAL WILL CONTAIN THE FINALISED TEXT FROM THE EIA REPORT.

 

6.1           In this section, the requirements, methodology, equipment, monitoring locations, criteria and protocols for the monitoring and audit of air quality impacts during the decommissioning of the CLS and off-site soil remediation are presented.

 

6.2           Two types of monitoring programme shall be conducted in connection with the Project.  Ambient air quality for TSP and dioxin shall be monitored at CLS and TKW during both demolition & excavation and remediation phases.  For the soil remediation plants at TKW, emissions from the plant stacks (i.e. biopile stack and thermal desorber stack) shall be regularly monitored.

 

6.3           The objectives of the air quality monitoring shall be:

·       to identify the extent of construction dust and dioxin impacts on sensitive receivers during both demolition & excavation and remediation phases;

·       to determine the effectiveness of mitigation measures to control fugitive dust and dioxin emission from activities during both demolition & and excavation and remediation phasesactivities;

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

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

·       to comply with Action and Limit (AL) Levels for air quality as defined in this Manual.

 

 

Demolition & Excavation Phase Monitoring

Methodology and Criteria

6.4           Monitoring and audit of the air pollutants levels shall TSP levels shall be carried out by the ETEMTET to ensure that any deterioration in air quality can be readily detected and timely actions taken to rectify the situation.

 

Ambient Monitoring at Sensitive Receivers

 

6.5           The criteria against which ambient air quality monitoring shall be assessed are:

For Total Suspended Particulate (TSP),

·       The Hong Kong Air Quality Objectives (AQOs) for TSP, 24-hour TSP levels of 260 mg/m3; and

·       The statutory 1-hour TSP limit of 500 mg/m3.

 

For dioxin,

·       The annual limit of 3.5 pg I-TEQ/m3 as proposed by the California Air Resources Board (CARB) of US Environmental Protection Agency.

·       The 1-hour Health Protection Concentration Level (HPCL) of 33.6 pg I-TEQ/m3 as stipulated in the Technical Memorandum for Issuing Air Pollution Abatement Notices to Control Air Pollution From Stationary Pollution Processes. ,

·       It should be noted that there is no relevant 24-hr air quality criterion for dioxin., Ffor the purpose of this EM&A Manual, the receptor concentration level (RCL) of 24-hr average shall be normalised to a reference receptor concentration level (RRCL) which is subject to compliance checking with the 1-hr HPCL. The normalisation procedure with reference to  a working guideline of 24-hr average has been derived from the 1-hr HPCL where the conversion is based on the mathematical formula given in the TM for Issuing Air Pollution Abatement Notices to Control Air Pollution From Stationary Polluting Processes is given below.

 

RRCL(1-hr) = RCL(24-hr) (tHPCL/ tRCL) –0.28047 ;

 

                  Where tHPCL is 1 which is the averaging time for 1-hr HPCL;

                           tRCL is 24 which is the averaging time the measurement taken at the ASR.

 

 

·       The annual limit of 3.5 pg I-TEQ/m3 as proposed by the California Air Resources Board (CARB) of US Environmental Protection Agency suggests a significant cancer risk of greater than 10-4 and unit risk factor of 38 (mg/m3)-1.  The annual average dioxin concentration at the receiver for significant cancer risk therefore proposed for the purpose of this Manual is 2.63 pg I-TEQ/m3 (i.e. the dividend of significant cancer risk over unit risk factor). A .  Given the conversion formula, the working guideline is derived as:Quarterly average of quarterly biannually 24-hour monitoring results shall be checked for compliance with thise annual limit.

·        

·        

HPCL(1-hr) = HPCL(24-hr) (    1 hr   ) –0.28047 ;

  24 hr

 

  HPCL(24-hr) =  HPCL(1-hr) ; where HPCL(1-hr) is 33.6 pg I-TEQ/m3

         24 0.28047

 

      HPCL(24-hr) = 13.8 pg I-TEQ/m3

 

6.6           These levels are not to be exceeded at Air Sensitive Receivers (ASRs).

 

6.7           The 1-hour and 24-hour TSP and 24-hour dioxin levels shall be measured to indicate their impacts arising from the demolition & excavation activities at CLS. The TSP and dioxin levels shall be measured by following the standard method as set out in High Volume Method for Total Suspended Particulates, Part 50 Chapter 1 Appendix B, Title 40 of the Code of Federal Regulations of the USEPA and USEPA Method TO-9A[1].

 

6.8           24-hour average TSP concentrations should be measured by drawing air through a high volume sampler (HVS) fitted with a conditioned, pre-weighed filter paper, at a controlled rate. After sampling for 24-hours, the filter paper with retained particles is collected and returned to the laboratory for drying in a desiccator followed by accurate weighing. 24-hour average TSP levels are calculated from the ratio of the mass of particulates retained on the filter paper to the total volume of air sampled. The analysis process normally takes about two days to complete.

 

6.9           For sampling of dioxin, a high-volume sampler with the pretreated quartz-fiber filter and PUF glass cartridge should be used for 24 hours to sample 325 to 400m3 ambient air.  After 24-hr sampling, the PUF cartridge should be covered with another quartz filter filter and the whole glass cartridge is then wrapped with the original aluminum foil, capped with Teflon® end caps, placed back into the original shipping container, identified, and shipped to the analytical laboratory for sample processing and analysis by HRGC-HRMS.

 

1.1        1-hour average TSP and dioxin concentrations shall be measured using the same monitoring method as 24-hour average (i.e. the HVS).

 

6.10        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 shall be recorded down in detail. A sample data sheet is shown in Appendix CB.

 

Plant Emissions Monitoring

6.11        The plant emission limits adopted for the purpose of this Manual are:

·       0.1 ng/m3 (at 0°C, 101.325 kPa, 11% O2 and dry condition) for the concentration limit of dioxins; and

·       20 mg/m3 (at 0°C, 101.325 kPa, 11% O2 and dry condition) for the concentration limit of Total Organic Carbons (TOC).

 

6.12        For stack sampling of dioxin for the thermal desorption plant, a sample is withdrawn isokinetically from the gas stream and collected in the sample probe, on a glass fiber filter, and on a packed column of adsorbent material. The sample cannot be separated into a particle and vapor fraction. The PCDD's and PCDF's are extracted from the sample, separated by high resolution gas chromatography (HRGC), and measured by high resolution mass spectrometry (HRMS). The standard method of stack sampling and measurements shall be in accordance with USEPA Method 23.[2]

 

6.13        TOC emissions from the stack of thermal desorption and from biopile vents shall be monitored. Continuous emission monitoring (CEM) system to be proposed by the Contractor shall be able to measure TOC emission and other plant performance parameters, such as oxygen, carbon dioxide and carbon monoxide continuously.  The measurement results shall be immediately recorded and processes such that timely remedial action can be implemented in case of exceedance of emission standard.

 

 

Monitoring Equipment

Ambient Monitoring at Sensitive Receivers

 

6.14        For measuring TSP, a high volume sampler (HVS) in compliance with the following specifications shall be used for carrying out the 1-hr and 24-hr monitoring:

·      0.6 - 1.7 m3/ min-1 (20-60 SCFM) adjustable flow range;

·      equipped with a timing/control device with +/- 5 minutes accuracy for 24 hours operation;

·      installed with elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;

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

·      flow control accuracy: +/- 2.5% deviation over 24-hour sampling period;

·      incorporated with an electronic mass flow rate controller or other equivalent devices;

·      equipped with a flow recorder for continuous monitoring;

·      provided with a peaked roof inlet;

·      incorporated with a manometer;

·      able to hold and seal the filter paper to the sampler housing at horizontal position;

·      easy to change the filter; and

·      capable of operating continuously for 24-hr period.

 

6.15        For dioxin, HVS cCapable of pulling ambient air through the filter/adsorbent cartridge at a flow rate of approximately 8 standard cubic feet per minute (scfm) (0.225 std m3/ \min) to obtain a total sample volume of greater than 325 scm over a 24-hour period shall be used. A typical dioxin HVS is shown in Figure 6.1.

 

6.16        The ETEMTET shall be responsible for the provision of the monitoring equipment. He shall ensure that sufficient number of HVSs with an appropriate calibration kit are available for carrying out the baseline, regular impacts monitoring and ad -hoc monitoring. The HVSs shall 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 shall be clearly labelled.

 

6.17        The flow rate of each HVS with mass flow controller shall be calibrated using an orifice calibrator. Initial calibration of the dust monitoring equipment shall be conducted upon installation and prior to commissioning. One point flow rate calibration shall be carried out every two months. Five-point calibration shall be carried out every six months.

 

6.18        The flow-rate of the sampler before and after the sampling exercise with the filter in position shall be verified to be constant and be recorded down on the data sheet as mentioned in Appendix CBD.

 

6.19        Wind 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. For installation and operation of the wind data monitoring equipment, the following points shall be observed:

·      the wind sensors should be installed on masts at an elevated level 10 m above the ground, so that they are clear of obstructions or turbulence caused by building(s);

·      the wind data should be captured by a data logger and to be downloaded for processing at least once a month;

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

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

 

6.20        In exceptional situations, the ETEMTET may propose alternative methods to obtain representative wind data upon approval from the IECEATLIEC and Engineer, and agreed with EPD.

 

Plant Emissions Monitoring

6.21        For dioxin sampling of the thermal desorption plant, the sampling equipment shall conform with the USEPA Method 23.  The schematic sampling train is shown in Figure 6.2. In particular, sealing greases shall not be used in assembling the train.

 

6.22        Monitoring of TOC for the thermal desorption plant and biopile shall be accomplished by a CEM system.  The specification and detection range of the CEM system shall be proposed by the contractor/ EMTET for the EATLIEC’s approval before the CEM system commences.

 

 

1.1Table 6.1 presents the recommended types and quantities of monitoring equipment required.

 

Table 6.1                                                                                                                                                                                       Recommended Monitoring Equipment

Description

Parameter

Quantity

High Volume sampler with flow range of 0.6 to 1.7 m3 min-1

TSP

1 Unit

High Volume sampler with flow rate of approx. 0.225 m3 min-1

Dioxin

1 Unit

 

Laboratory Measurement/Analysis

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

 

6.24        If a site laboratory or a non-HOKLAS accredited laboratory is used, the laboratory equipment and measurements shall meet with the satisfaction of the Engineer in consultation with the IECEATLIEC. The ETEMTET shall conduct regular audits to determine the accuracy of the measurement results.

 

Monitoring Locations

Ambient Monitoring at Sensitive Receivers

 

6.25        Air quality monitoring stations representing the air sensitive receivers have been identified in vicinity of the CLS and TKW.  The air quality at each monitoring station shall be monitored based on the Project phases. The Llocations of the monitoring station (Figures 6.3 and 6.4) and the commencement time for each Project phase is is presented in Table 6.12 and depicted in Figure 6.2.

 

Table 6.12      EM&A Representative AirAmbient Air Quality Monitoring Stations and their Commencement Time

ASR No.

Location

Ambient Air Quality Parameters to be MonitoredCommencement Phase

Building demolition and slope improvement phase

Remediation phase

TKW decommissiong phase

At CLS

At TKW

AM1

Penny’s Bay Power Station

üTSP

üTSP & Dioxin

--

--

AM2

Dockyard Building next to TKW

--

--

üTSP & Dioxin

TSP

AM3

Toll Plaza Administration Building of North Lantau Expressway

--

--

üTSP & Dioxin

TSP

 

 

 

ASR No.

Identity/Description

AM1

Penny’s Bay Power Station

 

6.26        Prior to the commencement of the EM&A programme, the proposed air quality monitoring stations shall be discussed and agreed with the Engineer, the ETEMTET, IECEATLIEC and EPD. When positioning the samplers, the following points shall be noted:

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

·       no two sampler shall be placed less than 2 m apart;

·       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;

·       a minimum of 2 m separation from walls, parapets and penthouses is required for rooftops samplers;

·       a minimum of 2 m separation from any supporting structure, measures horizontally is required;

·       no furnace or incinerator flue is nearby;

·       airflow around the sampler is unrestricted;

·       the sampler is more than 20 m from the dripline;

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

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

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

 

Plant Emissions Monitoring

 

6.27        Emissions of thermal desorption stack and biopile vent shall be measured during soil remediation phase upon commissioning of the remediation plant at TKW.  Monitoring points shall be at a stack/ vent location after treatment and before discharge and shall be agreed with the EATLIEC and the Engineer

 

1.1 

1.1Remediation Phase Monitoring

1.1Methodology and Criteria

1.1Monitoring and audit of the TSP levels shall be carried out by the ET to ensure that any deterioration in air quality can be readily detected and timely actions taken to rectify the situation.

1.1 

1.1The criteria against which ambient air quality monitoring shall refer to Section 6.5 of this Manual.

1.1 

1.1The stack emission limits adopted for the purpose of this Manual are:

1.11 ng/m3 for the concentration limit of dioxins; and

1.120 mg/m3 for the concentration limit of Total Organic Carbons.

1.1 

1.1The ambient air quality criteria shall not be exceeded at Air Sensitive Receivers (ASRs) and the stack emission limit shall not be exceeded during operation of the remediation plant.

1.1 

1.1The methodology of the ambient air quality monitoring shall refer to Sections 6.7 – 6.101 of this Manual.

1.1 

1.1For stack sampling of dioxin, a sample is withdrawn isokinetically from the gas stream and collected in the sample probe, on a glass fiber filter, and on a packed column of adsorbent material. The sample cannot be separated into a particle and vapor fraction. The PCDD's and PCDF's are extracted from the sample, separated by high resolution gas chromatography (HRGCG), and measured by high resolution mass spectrometry (HRMS). The standard method of stack sampling and measurements shall be in accordance with USEPA Method 23.[1]

1.1 

1.1Total Organic Carbons and other stack emissions, e.g. oxygen, carbon dioxide and carbon monoxide shall be monitored by a continuous emissions monitoring (CEM) system as proposed in the EIA report.

1.1 

1.1Monitoring Equipment

1.1Specifications of the high volume samplers (HVS) for measuring TSP & dioxin and the wind monitoring equipment shall refer to Sections 6.112 – 6.167 of this Manual.

1.1 

1.1For stack sampling, the sampling train as shown in the schematic diagram in Figure 6.3. Sealing greases shall not be used in assembling the train.

1.1 

1.1In exceptional situations, the ET may propose alternative methods to obtain representative wind data upon approval from the IEC and Engineer, and agreed with EPD.

1.1 

1.1Table 6.2 presents the recommended types and quantities of monitoring equipment required.

1.1 

1.1Table 6.2                                                                                                                                                                                               Recommended Monitoring Equipment

Description

Parameter

Quantity

High Volume sampler with flow range of 0.6 to 1.7 m3 min-1

TSP

2 Units

High Volume sampler with flow rate of approx. 0.225 m3 min-1

Dioxin

2 Units

 

Laboratory Measurement/Analysis

1.1A clean laboratory with constant temperature and humidity control, and equipped with the necessary measuring and conditioning instruments to handle the dust samples, shall be available for sample analysis and equipment calibration and maintenance. The laboratory shall be either HOKLAS accredited or another internationally accredited laboratory.

 

1.1If a site laboratory or a non-HOKLAS accredited laboratory is used, the laboratory equipment and measurements shall meet with the satisfaction of the Engineer in consultation with the IEC. The ET shall conduct regular audits to determine the accuracy of the measurement results.

 

Monitoring Locations

1.1Air quality monitoring stations have been identified in vicinity of the CLS. The location of the monitoring station is presented in Table 6.4 and depicted in Figure 6.4.

 

Table 6.4                                                                                                                                                                                       EM&A Representative Air Quality Monitoring Station

ASR No.

Identity/Description

AM2

Dockyard Building next to To Kau Wan

AM3

Toll Plaza Administration Building of North Lantau Expressway

 

1.1Prior to the commencement of the EM&A programme, the proposed air quality monitoring stations shall be discussed and agreed with the Engineer, the ET, IEC and EPD. Criteria for positioning the samplers shall refer to Section 6.23 of this Manual.

 

Baseline Monitoring

Ambient Monitoring at Sensitive Receivers

6.28        Baseline monitoring shall be carried out to determine the ambient 24‑hour and 1‑hour TSP and 24-hour dioxin levels at the monitoring locations prior to the commencement of the Project works. During the baseline monitoring, there shall not be any construction or dust generating activities in the vicinity of the monitoring stations.

 

1.1        For TSP, bBaseline monitoring shall be carried out for a continuous period of at least two weeks under typical weather conditions with the 24-hour and three 1-hour ambient measurements taken daily at each monitoring location.

6.29         For dioxin, baseline monitoring shall be carried out for 73 consecutive days with typical weather conditions with the 24-hour ambient measurements taken daily at each monitoring location. General meteorological conditions (wind speed, direction and precipitation) and notes regarding any significant adjacent dust producing sources shall also be recorded throughout the baseline monitoring period.

 

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

 

6.31        Baseline checking of ambient TSP and dioxin dust levels shall be carried out every six months at each monitoring location, when no dusty works activities are in operation. If the ETEMTET 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 Engineer, the IECEATLIEC and the EPD.

 

Plant Emissions Monitoring

6.32        Before commencement, the remediation plant shall be subject to a satisfactory commissioning test on the plant performance and emission compliance.  Upon the commissioning test result, compliance standards of plant performance parameters, such as oxygen, carbon dioxide and carbon monoxide shall be determined and shall be checked against during impact monitoring.

 

Impact Monitoring

Ambient Monitoring at Sensitive Receivers

6.33        The monthly schedule of the compliance and impact monitoring programme shall be drawn up by the ETEMTET one month prior to the commencement of the scheduled construction period. For regular impact monitoring, a sampling frequency of at least once in every six-days shall be strictly observed at all of the monitoring stations for 24-hour TSP and dioxin monitoring. In case of complaints, 1-hour TSP monitoring shall be conducted at least three times in every six-days when the highest dust impacts are likely to occur.

6.34        It is recommended that 24-hour dioxin levels at monitoring stations shall be monitored monthly for the first 6 months.  After review of the 6-month monitoring result and subject to the agreement of the EATLIEC, the Engineer and EPD, the monitoring frequency shall be stepped down to once every 3 months.

 

6.35        The impact monitoring programme can be summarized in Table 6.2.

 

Table 6.2      Impact ambient air monitoring programme

Parameter

Sampling hours

Frequency

TSP

1 hour

·     3 times every 6 days (as required in case of complaints)

24 hours

·     Once every 6 days

Dioxin

24 hours

·     Once every month for the first 6 months

·     After review of monitoring results and subject to the agreement of the EATLIEC, the Engineer and EPD, then once every 3 months

 

 

6.36        Before commencing the monitoring, the EMTET shall inform the EATLIEC of the impact monitoring programme such that the EATLIEC can conduct an on-site audit to ensure the accuracy of the impact monitoring results.

 

 

 

 

1.1The specific time to start and stop the 24-hour TSP monitoring shall be clearly defined for each location and shall be strictly followed by the operator.

 

Plant Emissions Stack Monitoring

6.37        While TOC eEmissions of the plants of the stack are to be measured by a CEM system, the dioxin emission of the thermal desorption stack soil remediation shall be composite sampled and determined measured at least monthly one time during during the plant operation. Monitoring requirements are summarized in Table 6.3.commissioning of the facility.  Upon satisfactory commissioning test result, the soil remediation facility shall be put to be operational.  The stack emission during facility operation shall be checked every month at a time interval to be agreed with the Engineer and the IEC.

 

Table 6.3      Plant Emission Monitoring Requirements

Emission Point

Parameter

Sampling hours

Sampling details

Frequency

Biopile gas vent

TOC

Continuous

CEM system

Continuous

Stack of thermal desorption plant

TOC, O2, CO& CO2

Continuous

CEM system

Continuous

Dioxin

3 hours (180 mins)

Composite of 12 nos. of 15-min samples taken during the plant operation hours

Once every month for the first 6 months

Once every 3 months for the remainder of programme

 

 

 

Compliance Assessment

6.38        Action and Limit (A/L) levels that pprovide an appropriate framework for the interpretation of monitoring results has to be agreed between EMTET, EATLIEC, EPD and the Engineer before commencement of the air monitoring. The air quality monitoring data shall be checked against the agreed A/L  levels.  Recommended A/L levels are  as listed in Tables 6.45  and 6.56.

 

Table 6.45      Proposed Derivation of Action and Limit Levels for Ambient Monitoring

Parameters

Average Time

Action Level

Limit Level

TSP

24 hour

-- For baseline level £ 200 mg/m3,

Action Level = (baseline level * 1.3 + Limit level)/2;

--

For baseline level > 200 mg/m3,

Action level = Limit level

HKAQO of

260 mg/m3

1 hour

-- For baseline £< 384154 mmg m-3,

Action Level = (baseline level * 1.3 + Limit level)/2

-- For baseline £ 384 mg m-3

Action Level = Limit level

 

For 154 mg m-3 < baseline > 269 mg/m3, Action Level = 350 mg/m3

 

· For baseline > 269 mg m-3,

Action Level = (baseline level * 1.3 + Limit level)/2

EIAO Statutory Limit of 500 mg/m3

Dioxin

24 hour

-- For baseline level £ 10.6 pg I-TEQ/m3, Action level = (baseline level * 1.3 * (1/24) –0.2.8047  + Limit level)/2;

 

-- For baseline level > 10.6 pg I-TEQ/m3, Action level = Limit level

HPCL(1-hr) of

33.613.8 pg I-TEQ/m3

Quarterly Aaverage of biannual 24-1 hour measurements in the monitoring year

For baseline level £ 25.8 pg I-TEQ/m3, Action level = (baseline level * 1.3 + Limit level)/2;

 

For baseline level > 25.8 pg I-TEQ/m3

-- Action level = Limit level

Annual average of 2.63 pg I-TEQ/m3 as derived from CARB’s suggestion of the significant cancer risk and unit risk factor. guideline of 3.5HPCL of

33.6 pg I-TEQ/m3

 

Table 6.65      Proposed Action and Limit Levels for Plant Emissions Stack Monitoring

Emission Point

Parameter

Action and Limit level

Biopile vent

Total Organic Carbon (TOC)

20 mg/m3 at 56 m3/min

Thermal desorption stack

Dioxin

0.11 ng/m3 at 62000 m3/minscfm

Total Organic Carbon (TOC)

20 mg/m3 at 60 m3/min

Oxygen, Carbon dioxide, Carbon monoxide

To be agreed between EMTET, EATLIEC, the Engineer and EPD

 

Event and Action Plan (EAP)

6.39        The principle upon which the EAP is based is on the prescription of procedures and actions associated with the measurement of certain defined levels of air pollution recorded by the environmental monitoring process and the agreed A/L levels. defined in the tables above. Th e ET shall compare the impact monitoring results with the air quality criteria (Tables 6.5) established for 24-hour TSP and 1-hour TSP. In cases where exceedance of these A/L levelcriterias occurs, the ETEMTET, the IECEATLIEC, the Engineer and the Contractor shall strictly observe the relevant actions of the respective EAP (Tables 6.9 and 6.10) as described below.

 

 

Table 6.9      Event / Action Plan for Ambient Air Quality Monitoring

EVENT

ACTION

EMTET

EATLIEC

ER

CONTRACTOR

 

ACTION LEVEL

 

1.    Exceedance for one sample

 

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

2.     Inform EATLIEC and ER;

3.     Repeat measurement to confirm finding;

4.     Increase monitoring frequency to daily.

 

1.      Check monitoring data submitted by EMTET;

2.      Check Contractor’s working method.

 

1.    Notify Contractor.

 

1.    Rectify any unacceptable practice;

2.    Amend working methods if appropriate.

 

2.    Exceedance for two or more consecutive samples

 

1.     Identify source;

2.     Inform EATLIEC and ER;

3.     Advise the ER on the effectiveness of the proposed remedial measures;

4.     Repeat measurements to confirm findings;

5.     Increase monitoring frequency to daily;

6.     Discuss with EATLIEC and Contractor on remedial actions required;

7.     If exceedance continues, arrange meeting with EATLIEC and ER;

8.     If exceedance stops, cease additional monitoring.

 

1.    Check monitoring data submitted by EMTET;

2.    Check Contractor’s working method;

3.    Discuss with EMTET and Contractor on possible remedial measures;

4.    Advise the EMTET on the effectiveness of the proposed remedial measures;

5.    Supervise Implementation of remedial measures.

 

1.    Confirm receipt of notification of exceedance failure in writing;

2.    Notify Contractor;

3.     Ensure remedial measures properly implemented.

 

 

1.    Submit proposals for remedial to ER within 3 working days of notification;

2.    Implement the agreed proposals;

3.    Amend proposal if appropriate.

 

LIMIT LEVEL

 

1.     Exceedance for one sample

 

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

2.    Inform IEC, ER, , Contractor and EPD;

3.    Repeat measurement to confirm finding;

4.    Increase monitoring frequency to daily;

5.    Assess effectiveness of Contractor’s remedial actions and keep EATLIEC, EPD and ER informed of the results.

 

1.    Check monitoring data submitted by EMTET;

2.    Check Contractor’s working method;

3.    Discuss with EMTET and Contractor on possible remedial measures;

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

5.    Supervise implementation of remedial measures.

 

1.    Confirm receipt of notification of exceedancefailure in writing;

2.    Notify Contractor;

3.    Ensure remedial measures properly implemented.

 

1.      Take immediate action to avoid further exceedance;

2.      Submit proposals for remedial actions to EATLIEC within 3 working days of notification;

3.      Implement the agreed proposals;

4.      Amend proposal if appropriate.

 

2.    Exceedance for two or more consecutive samples

 

1.     Notify IECE, ER, Contractor and EPD;

2.     Identify source;

3.     Repeat measurement to confirm findings;

4.     Increase monitoring frequency to daily;

5.     Carry out analysis of Contractor’s working procedures to determine possible mitigation to be implemented;

6.     Arrange meeting with EATLIEC and ER to discuss the remedial actions to be taken;

7.     Assess effectiveness of Contractor’s remedial actions and keep EATLIEC, EPD and ER informed of the results;

8.     If exceedance stops, cease additional monitoring.

 

1.    Discuss amongst ER, EMTET, and Contractor on the potential remedial actions;

2.    Review Contractor’s remedial actions whenever necessary to assure their effectiveness and advise the ER accordingly;

3.    Supervise the implementation of remedial measures.

 

1.     Confirm receipt of notification of exceedancefailure in writing;

2.     Notify Contractor;

3.     In consolidation with the EATLIEC, agree with the Contractor on the remedial measures to be implemented;

4.     Ensure remedial measures properly implemented;

5.     If exceedance continues, consider what portion of the work is responsible and instruct the Contractor to stop that portion of work until the exceedance is abated.

 

1.    Take immediate action to avoid further exceedance;

2.    Submit proposals for remedial actions to EATLIEC within 3 working days of notification;

3.    Implement the agreed proposals;

4.    Resubmit proposals if problem still not under control;

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

 

Table 6.10     Event / Action Plan for Plant Emissions Monitoring

EVENT

ACTION

EMTET

EATLIEC

ER

CONTRACTOR

 

ACTION/ LIMIT  LEVEL

 

1.    Exceedance for one sample for TOC, O2, CO2 and CO

 

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

2.    Inform IEC, ER, Contractor and EPD;

1.     Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results.

 

1.      Check monitoring data submitted by ET;

2.      Check Contractor’s working method;

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

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

5.      Supervise implementation of remedial measures.

 

1.      Confirm receipt of notification of exceedance in writing;

2.      Notify Contractor;

3.      Ensure remedial measures properly implemented.

 

1.      Take immediate action to avoid further exceedance;

2.      Submit proposals for remedial actions to IEC within 3 working days of notification;

3.      Implement the agreed proposals;

4.      Amend proposal if appropriate.

 

1.    Exceedance for two or more consecutive samples for TOC, O2, CO2 and CO

 

OR

 

Exceedance for one sample for dioxin

 

1.     Notify IEC, ER, Contractor and EPD;

2.     Identify source;

3.     Carry out analysis of Contractor’s working procedures to determine possible mitigation to be implemented;

4.     Arrange meeting with IEC and ER to discuss the remedial actions to be taken;

5.     Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results;

6.     If exceedance stops, cease additional monitoring.

 

1.      Discuss amongst ER, ET, and Contractor on the potential remedial actions;

2.      Review Contractor’s remedial actions whenever necessary to assure their effectiveness and advise the ER accordingly;

3.      Supervise the implementation of remedial measures.

 

1.     Confirm receipt of notification of exceedance in writing;

2.     Notify Contractor;

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

4.     Ensure remedial measures properly implemented;

5.     If exceedance continues, instruct the Contractor to slow down or stop the process until the exceedance is abated.

 

1.    Take immediate action to avoid further exceedance;

2.    Submit proposals for remedial actions to IEC within 3 working days of notification;

3.    Implement the agreed proposals;

4.    Resubmit proposals if problem still not under control;

5.    Slow down or stop the process as determined by the ER until the exceedance is abated.

 

 

 

 

 

Mitigation Measures

6.40        The EIA Report has recommended air quality control and mitigation measures during the construction phases of the Project. These are outlined in the Implementation Schedule (Appendix A). In the event of exceedances or complaints, the Contractor shall be responsible for reviewing the effectiveness of these measures and for proposing, designing and implementing alternative measures as appropriate.

 

 

7               WATER QUALITY

Introduction

7.1           As identified in the EIA Report, no adverse impact arising from building demolition at CLS, slope improvement and construction of remediation plants at TKW works during demolition/ excavation/ remediation phases and from the seepage of contaminated groundwater from CLS are expected with the implementation of good practices stipulated in EPD’s ProPECC Note PN 1/94 ‘Construction Site Drainage’.  Also the seepage of CLS groundwater would have no significant water quality impact on the marine water and drainage channel in vicinity. ThereforeHowever, the effluent of the centralised wastewater treatment unit in TKW that cater leachate, contaminated runoff, wheel wash no water and decontamination water is to be monitored before being discharged into local sewers/ drainage channels. quality monitoring for surface runoff to be discharged during demolition and excavation at CLS hwill  be required.  Auditing works during every Project phase should be carried out to ensure that the Contractor implements the good practices to minimize the impact.

 

Monitoring Requirements

7.2           At every Project phase, the Contractor shall monitor the water quality of effluent of centralised water treatment units on-site, in accordance with the requirements of licence issued under Water Pollution Control Ordinance. Subject to the licence requirement, the monitoring location(s) shall be at each final effluent discharge point. The effluent shall be monitored weekly for the first 3 months and then monthly for the following parameters as minimum.

 

·       Suspended solids,

·       TPH,

·       Metals (Ar, Cd, Cr, Cu, Pb, Ni, Zn), and

·       Dioxin.

 

7.3           The effluent sample shall be analysed by a HOKLAS laboratory for all parameters. The analytical method for every parameter shall be proposed by the Contractor/ EMTET for agreement with the EATLIEC, EPD and the Engineer prior to effluent testing.

 

Compliance Assessment and Action Plan

7.4           Discharge limits of water quality parameter shall Action and Limit (A/L) levels that provide an appropriate framework for the interpretation of monitoring results has be specified in the Waste Disposal Ordinance to be compatible with the requirement of discharge licence and shall conform to the Technical Memorandum on Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters (TM-ES). Since TM-ES has no provision for dioxin, it is proposed for the purpose of this Manual that ‘undetectable concentration’ (i.e. < 10 pg I-TEQ/L) be adopted as the effluent discharge standard for dioxin. The analytical method shall be subject to EPD’s agreement prior to commencement of testing.

 

7.5           Should any of the effluent discharge standards be exceeded, the Contractor shall follow the event and action plan as suggested in Table 7.1.

 

Table 7.1      Event and Action Plan for the Effluent Discharge Monitoring

Event

Action

1.     Exceedance of discharge limitA/L level for any water quality parameter of the effluent discharge

 

·       EMTT/ the Contractor/ ET to notify EATLIEC, EPD and the Engineer

·       The Contractor to stop the effluent discharge

·       The Contractor to propose remedial action for EATLIEC & EPD’s acceptance and the Engineer’s approval

·       The Contractor resumes the discharge with the approved remedial action implemented.

 

 

Water Quality Mitigation Mitigation Measures

1.1           The EIA Report has recommended water quality control and mitigation measures during every phase of the Project. These are outlined in the Implementation Schedule (Appendix A). In the event of exceedances or complaints, the Contractor shall be responsible for reviewing the effectiveness of these measures and for proposing, designing and implementing alternative measures as appropriate. Monthly Weekly site inspections should be carried out in order to ensure the mitigation measures are implemented and are working effectively.  The Contractor shall be responsible for the design and implementation of these measures illustrated below:

7.6            

 

Demolition and Excavation

1.1Mitigation measures are required to prevent and minimise the adverse water quality impacts during the shipyard decommissioning and decontamination works.  The details of the recommended mitigation measures are summarised in the following sections.

 

Site Runoffs and Discharges

Surface runoff

1.1Surface run-off from the construction sites should be directed into storm drains via adequately designed sand/silt removal facilities such as sand traps, silt traps and sediment basins.  Channels, earth bunds or sand bag barriers should be provided on site to properly direct stormwater to such silt removal facilities.  Catchpits and perimeter channels should be constructed in advance of site formation works and earthworks.

 

1.1Silt removal facilities, channels and manholes should be maintained and the deposited silt and grit should be removed regularly, at the onset of and after each rainstorm to ensure that these facilities are functioning properly at all times.

 

1.1If excavation cannot be avoided during rainy seasons, temporarily exposed soil surfaces should be covered e.g. by tarpaulin, and temporary access roads should be protected by crushed stone or gravel, as excavation proceeds.  Intercepting channels should be provided (e.g. along the crest/edge of the excavation) to prevent storm runoff from washing across exposed soil surfaces.  Arrangements should always be in place to ensure that adequate surface protection measures can be safely carried out well before the arrival of a rainstorm.

 

1.1Earthworks final surfaces should be well compacted and the subsequent permanent work or surface protection should be carried out as soon as practical after the final surfaces are formed to prevent erosion caused by rainstorms.  Appropriate intercepting channels and partial shelters should be provided where necessary to prevent rainwater from collecting within the trenches or foundation excavationfooting excavations.  Groundwater, and rainwater if it cannot be completely avoided, collected within the trenches or foundation excavationfooting excavations should be pumped out and recharged back into the ground within the shipyard site.

 

 

1.1Open stockpiles of construction materials (e.g. aggregates and sand) on site should be covered with tarpaulin or similar fabric during rainstorms.  Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system.

 

 

1.1Manholes (including any newly constructed ones) should always be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris from getting into the drainage system, and to prevent storm run-off from getting into foul sewers.  Discharges of surface run-off into foul sewers must always be prevented in order not to unduly overload the foul sewerage system.

 

Wheel Washing Water

1.1All vehicles and plant should be cleaned before they leave the construction site to ensure that no earth, mud or debris is deposited by them on roads.  A wheel washing bay should be provided at every site exit, if practicable, and wash-water should have sand and silt settled out or removed before being discharged into the storm drains.  However, discharge of wheel wash water should be minimised and recycled where possible.  The section of construction road between the wheel washing bay and the public road should be paved with backfill to reduce vehicle tracking of soil and to prevent site run-off from entering public road drains.

 

Wastewater from Site Facilities

1.1Sewage from toilets, canteens and similar facilities should be discharged into a foul sewer or chemical toilets should be provided.  Should the use of chemical toilets be necessary then these should be provided by a licensed contractor, who will be responsible for appropriate disposal and maintenance of these facilities.  Wastewater collected from canteen kitchens, including that from basins, sinks and floor drains, should be discharged into foul sewers via grease traps.

 

1.1Vehicle and plant servicing areas, vehicle wash bays and lubrication bays should, as far as possible, be located within roofed areas.  The drainage in these covered areas should be connected to foul sewers via a petrol interceptor.  Oil leakage or spillage should be contained and cleaned up immediately.  Waste oil should be collected and stored for recycling or disposal, in accordance with the Waste Disposal Ordinance.

 

Storage and Handling of Oil, Other Petroleum Products and Chemicals

1.1All fuel tanks and chemical storage areas should be provided with locks and be sited on sealed areas.  The storage areas should be surrounded by bunds with a capacity equal to 110% of the storage capacity of the largest tank to prevent spilled oil, fuel and chemicals from reaching the receiving waters.  The Contractors should prepare guidelines and procedures for immediate clean-up actions following any spillages of oil, fuel or chemicals.

 

Dewatering during Excavation

1.1The contaminated groundwater collected from the dewatering processes during the excavation and foundation works would require treatment to meet the statutory water quality standards before discharging into the storm drains.  Due to the difficulty of treatment, discharge is not recommended.  Without compromising the water quality in the neighbouring waters as discussed in the previous section, it is recommended that the contaminated ground water should be recharged back into the ground in the vicinity.  The recharge scheme as recommended in the chapter of “Land Contamination Assessment” of this Manual shall be followed.

 

Groundwater Seepage

1.1Given that the water quality impact arising from the seepage of contaminated groundwater into the adjacent drainage channel is insignificant, no mitigation measure is considered necessary in this respect.

 

Slope Works behind Cheoy Lee Shipyard

1.1On-site measures as given in Sections 7.4 – 7.13 are recommended to mitigate the potential water quality impact.

 

Soil Remediation at To Kau Wan

1.1Mitigation measures are required at the To Kau Wan site to minimize the potential water quality impacts during the decontamination process.

 

Biopiling

1.1Upon formation of a biopile, the biopile shall be covered by anchored imlow-permeable geotextiles to prevent contaminated runoff. The exposed biopile section at any time shall not be more than 5m in length.

 

1.1Impermeable liner shall be placed at the bottom of the biopiles and leachate collection sump shall be constructed along the perimeter of the biopiles to prevent leachate from contaminating the underlying soil/groundwater. 

 

1.1Concrete bund shall be constructed along the perimeter of biopiles to prevent the runoff coming out from the contaminated soil.

 

Solidification

1.1Any pit used for solidification area shall be shallower than the water table to minimize the leaching of the contaminated soils.  And an imlow permeabileity membrane/sheet shall be placed at the bottom of any solidification pit during the solidification process.

 

1.1Concrete bund shall be constructed along the perimeter of the solidification areas to prevent the runoff coming out from the contaminated soil.

 

Thermal Desorption

1.1To avoid accidental spillage or leakage of the contaminants to surroundings, the ground surface at the storage areas should be covered with geotextile materials and the sealed cover of the containers shall be lined with geosynthetic materials.   All the condensates from the thermal desorption processes would be concentrated for off-site disposal (non-aqueous phase).  The aqueous phase of the condensate would be used to quench the temperature of the thermally-treated soil and rehumidify it to reach a specified moisture content. Therefore no aqueous phase wastewater will be produced.

 

Water Quality Monitoring

1.1During during demolition and excavation at CLS site, the Contractor shall monitor the water quality of surface runoff to be discharged, in accordance with the requirements of Technical Memorandum on Standards for Effluents Discharged into Drainage and Sewerage Systems, Inland and Coastal Waters.  The monitoring location(s) shall be the discharge location(s).  Should the monitoring results indicate that the water quality assessment criteria for suspended solids, oil and grease, BOD or COD are exceeded, the Contractor shall inform the Engineer and rectify unacceptable practice.  Treatment and/or disposal method shall be proposed by the Contractor.

 

 

8               WASTE MANAGEMENT

Introduction

8.1           During construction phase, waste management will be the contractor’s responsibility to ensure that all wastes produced during every Project phase in accordance with good waste management practices and EPD’s regulations and requirements.  The Contractor shall also follow the Waste Management Plan when managing all different types of wastes on site. 

 

 

8.2           Waste materials generated during demolition/ excavation or remediation activities, such as construction and demolition (C&D) materials, chemical wastes, asbestos and general refuse from the workforce, are recommended to be audited at regular intervals (at least monthly) to ensure that proper storage, transportation and disposal practices are being implemented.  This monitoring of waste management practices will ensure that these solid and liquid wastes generated during construction are not disposed of into the surrounding storm drains.  The Contractor will be responsible for the implementation of any mitigation measures to minimise waste or redress problems arising from the waste materials.

 

Waste Control and Mitigation Measures

8.3           Mitigation measures for waste management are summarised below. With the appropriate handling, storage and removal of waste arisings during the Project period as defined below, the potential to cause adverse environmental impacts will be minimised.

 

 

Construction and Demolition Phase

Good Site Practice and Waste Reduction Measures

8.4           It is not expected adverse waste impacts would arise provided that good site practice is strictly followed.  Recommendations for good site practice during the decommissioning and demolition activities include:

·       Use waste haulier authorised or licensed to collect specific category of waste;

·       Obtain the necessary registration and licences under the Waste Disposal Ordinance and the Waste Disposal (Chemical Waste) (General) Regulation from the Environmental Protection Department;

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

·       training of site personnel in proper waste management and chemical waste handling procedures;

·       provision of sufficient waste disposal points and regular collection for disposal;

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

·       separation of chemical wastes for special handling and appropriate treatment at a licensed facility;

·       regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

·       a recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites);

·       In order to monitor the disposal of C&D material and solid wastes at public filling facilities and landfills, and control fly-tipping, a trip-ticket system shall be included as one of the contractual requirements and implemented by the Environmental Team.  One may make reference to WBTC No. 5/99 for details; and

·       A Waste Management Plan (WMP) shall be prepared and this WMP shall be submitted to the Engineer for approval.  One may make reference to WBTC No. 29/2000 for details.

8.5           Good management and control can prevent the generation of 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 practice.  Recommendations to achieve waste reduction include: 

·       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;

·       to encourage collection of aluminium cans, paper waste and plastic bottles by individual collectors, separate labelled bins shall be provided to segregate this wastes from other general refuse generated by the work force;

·       any unused chemicals or those with remaining functional capacity shall be recycled;

·       use of reusable non-timber formwork to reduce the amount of C&D material;

·       prior to disposal of C&D waste, it is recommended that wood, steel and other metals shall be separated for re-use and / or recycling to minimise the quantity of waste to be disposed of to landfill;

·       proper storage and site practices to minimise the potential for damage or contamination of construction materials; and

·       plan and stock construction materials carefully to minimise the amount of waste disposal and avoid unnecessary generation of waste.

8.6           In addition to the above good site practice and waste reduction measures, specific mitigation measures are recommended below for the identified waste arising to minimise environmental impacts during handling, transportation and disposal of these wastes.

Waste Recycling

8.7           To minimise the amount of waste disposal to landfills, the general refuse (not contaminated) shall be reused and recycled as much as practical.  Waste sorting and segregation shall be carried out in accordance with the following categories for recycling:

·       Plastic (i.e. plastic bag, plastic bottle, plastic packaging, etc.)

·       Rubber;

·       Paper;

·       Wood/ timber;

·       Glass;

·       Textile; and

·       Metal (i.e. aluminium can, steel metal, ferrous metal, and non-ferrous metal).   

Asbestos

8.8           Although not covered in this Report, the removal shall follow the approved AAP and conditions stipulated in the EP for Asbestos Abatement work in CLS at Penny’s Bay and the Code of Practice on the Handling, Transportation and Disposal of Asbestos Waste.  

 

Chemical Waste

8.9           Removal Sequence: As asbestos removal will precede building demolition, so the concern will be non-asbestos chemical waste.  To avoid disturbance of potential chemical waste during building demolition, all movable objects including sand/ grit/ deposits inside the building under demolition shall be cleared in advance.  “Movable objects” shall mean all items inside the building other than those belong parts of the building structure or are anchored firmly on the building structure/ existing ground. All movable objects including sand/ grit/ deposits shall be treated as chemical wastes and placed in drums and delivered to a centralised covered area on site.  No mixing or off-site disposal of the waste shall be allowed.  The non-removable objects shall be covered with the heavy-duty polythene sheets for later disposal.  Transportation and storage of the waste shall be in accordance with the relevant chemical waste regulations.  Particularly the requirement of spill prevention measures, worker protection (e.g. PPE) and proper segregation from other wastes shall be observed. Whereas all other chemical wastes outdoors (except dioxin-contaminated soil which shall be transported by roll-off trucks for added safety) shall be handled and stored in accordance with Waste Disposal Ordinance and Waste Disposal (Chemical Waste) (General) Regulation. 

 

8.10        Workers involved in the handling of chemical waste shall be suitably trained and shall wear appropriate protective masks and clothing when handling such materials.  Chemical wastes shall be handled according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.  Spent chemicals shall be stored and collected by licensed collectors for disposal at licensed facilities in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

 

8.11        Containers used for the storage of chemical waste shall:

·       Be suitable for the substance they are holding, resistant to corrosion, maintained in good condition, and securely closed;

·       Have a capacity of less than 450 litres unless the specifications have been approved by the EPD; and

·       Display a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the Regulations.

 

8.12        The storage area for chemical waste shall:

·       Be clearly labelled and used solely for the storage of chemical waste;

·       Be enclosed on at least 3 sides;

·       Have an impermeable floor and bunding, of capacity to accommodate 100% of the volume of the largest container or 20% by volume of the chemical waste stored in that area, whichever is the greatest;

·       Have adequate ventilation;

·       Be covered to prevent rainfall entering (water collected within the bund must be tested and disposal as chemical waste if necessary); and

·       Be arranged so that incompatible materials are adequately separated.

 

8.13        Disposal of chemical waste shall:

·       Be via a licensed waste collector; and

·       Be at a facility licensed to receive chemical waste, such as CWTC which offers a chemical waste collection service and can supply the necessary storage containers; or

·       Be a recycler of the waste, with waste disposal licence from the EPD.

Sorting of C&D Material On-site

8.14        The Contractor shall separate the C&D material including steel, timber and scrap metals from other wastes, as far as practical, and shall arrange for recycling and reuse on site to the extent possible.  All C&D materials arising from demolition work shall be sorted on-site and be separated into different groups for disposal at landfills, PFAs, or recycling as appropriate in accordance with WBTC No. 5/98.   To maximise landfill life, Government policy discourages the disposal of C&D wastes with more than 20% inert material by volume (or 30% inert material by weight) at landfill.  Inert C&D material (public fill) is directed to reclamation areas or to an approved public filling area (PFA), where it has the added benefit of offsetting the need for removal of materials from borrow areas for reclamation purposes. Due to limited space at landfills, disposal at reclamation sites or PFAs would be the preferred option.  A trip-ticket system for disposal of C&D material as detailed in WBTC No. 5/99 shall be followed.  Finally, a method statement for the sorting, processing and disposal of C&D materials arising from demolition work shall be submitted by the Contractor to the Engineer for his approval. 

 

Building Indoor Surfaces Containing Contaminated Residues

8.15        Building sampling shall be carried out prior to demolition to characterise the contaminants present on the building surfaces and identify suitable reagents for decontamination.  After contaminants characterisation, a Decommissioning Plan shall be prepared by the specialist Contractor recommending the indoor remediation protocols as well as the demolition method (preferably a top-down and non-explosive approach) for the Engineer’s approval.  Those building containing contaminated residues shall be decontaminated first before demolition.   In general, the building decontamination may include the following processes:

·       Power washing;

·       Scabbling;

·       Grit blasting; and

·       Confirmation testing. 

 

8.16        Power washing and grit blasting will produce secondary wastes, so scabbling is the preferred method of cleaning.  To ensure effective and proper cleaning, adequate on-site supervision by competent personnel is required. 

 

8.17        After completion of building decontamination, the material can be discarded as normal C&D material.  The chemical deposits or residues from scabbling will be disposed of to CWTC for ultimate disposal.    

 

General Refuse

8.18        General refuse shall be stored in enclosed bins or compaction units separated from C&D material and chemical wastes.  No open stockpile of general refuse is allowed on site to minimise environmental impacts.  A reputable waste collector shall be employed by the contractor to remove general refuse from the site, separately from C&D material and chemical wastes, on a daily or every second day basis to minimise odour, pest and litter impacts. 

 

8.19        Aluminium cans, paper waste and plastic bottles are often recovered from the waste stream by individual collectors if they are segregated or easily accessible, so separate labelled bins for their deposit shall be provided if feasible. Site office waste can be reduced through recycling of paper if volumes are large enough to warrant collection.  Participation in a local collection scheme shall be considered if one is available.

 

Slope Improvement Phase

8.20        The excavated soil and rock shall be disposed of to PFAs.  In addition, a Waste Management Plan shall be prepared by the Contractor in order to keep waste arising to a minimum and to ensure that waste is handled, transported and disposed of in a suitable manner.

 

8.21        The design of slope work shall be planned carefully to maximise the preservation of existing profiles with stabilisation as necessary to minimise cutting and filling.     

 

Remediation Phase

Cheoy Lee Shipyard Site

8.22        On handling contaminated soil, especially of dioxin-contaminated, site workers and the backhoe operators shall be protected from skin contact and inhalation of soil gas.  The protection shall be achieved by providing each worker/ operator sufficient personal protective equipment, such as coverall, respirator, etc. and suitable training on handling contaminated waste.

 

8.23        Chemical wastes shall be handled in compliance with the provisions of Waste Disposal (Chemical Waste) (General) Regulation.  The site contractors, workers and operatives shall also be required to follow appropriate procedures on handling chemical wastes according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

 

8.24        Identified asbestos waste shall be handled in accordance with the Project Profile of Asbestos Abatement Work in CLS, however, the asbestos discovered in soil of Area 3 shall follow the following requirements:

·       While the APCO requires registered professionals to undertake the abatement work, the Waste Disposal Ordinance and the Waste Disposal (Chemical Waste) (General) Regulation provide control on the packaging, labelling, storage, collection and disposal of asbestos waste.  Asbestos wastes shall be handled in accordance with the Code of Practice on the Handling, Transportation and Disposal of Asbestos Waste issued by the Environment and Food Bureau.

·       Asbestos waste, by definition under the Waste Disposal (Chemical Waste) (General) Regulation, is categorised as chemical waste of which the arrangement of production, collection and disposal will follow the ‘trip-ticket’ system as with other chemical wastes.  The registered asbestos contractor who is the waste producer shall appoint a licensed asbestos waste collector to collect the packaged asbestos waste and deliver to the designated landfill for disposal. Under the Waste Disposal Ordinance and Waste Disposal (Chemical Waste) (General) Regulation, directions of asbestos disposal shall be obtained from the EPD and prior arrangement with the landfill operator shall be made before disposal.

 

Collection and Transportation of Wastes

8.25        Dump trucks will be extensively used for the transit of waste, other than material contaminated with dioxin which will be transported by roll-off trucks between the excavation area and TKW.  The following precautionary measures shall be taken to avoid spillage, wind erosion and incident in transit.

·       Transportation of contaminated soil shall be escorted to improve road safety; 

·       Strict speed limit shall be imposed on the whole length of the haul road; 

·       Never overload the trucks to prevent spillage of contaminated soils;

·       Dioxin-contaminated material shall be transported in roll-off trucks (containers).

·       Always cover the payload on each dump truck with strong and low permeable sheeting or the likes to withstand wind and rain while the truck is travelling; and

·       Adequately but not excessively wet the payload to reduce dust generation.

 

8.26        As dioxin-contaminated soil is classified as chemical waste, the trucks shall be labelled, handled and transported in accordance with the Waste Disposal Ordinance and the Waste Disposal (Chemical Waste) (General) Regulation. When the trucks approach the TKW Site, they will approach from west well clear of the east side of the site thereby avoid disturbance to the area where the group of egrets was sighted.  

 

8.27        Dioxin condensate (oily residue) generated from the thermal desorption plant shall be transported in heavy duty and sealable drums, which will then be collected by CWTC’s own fleets which are designed and licensed for the collection of hazardous and chemical wastes. 

 

8.28        Finally, a contingency plan shall be prepared by the Contractor to spell out the necessary procedures to be taken and in case of accident and/ or emergency when transporting the contaminated soil to off-site location(s).  All responsible parties and/ or persons and their contact numbers shall be listed in the plan. 

 

Material Handling, Transportation and Storage

8.29        The movement of contaminated material between the shipyard and the off-site treatment area needs to be carried out in a controlled manner taking reasonable precautions to minimize potential losses that might otherwise have significant environmental impacts. The measures recommended need to take into account the degree of contamination of the material involved and the potential impact of losses. This subsection considers the requirements for material handling, transportation and storage in order to arrive at an appropriate scheme to minimise environmental risks in a cost effective manner. 

 

8.30        Material Handling and Transportation: Material contaminated with heavy metals, TPH and SVOCs will be handled in the established manner using bulk earth moving equipment for on-land works including excavation by excavators on site. Dump trucks with sealed rear gates will be used to move the contaminated material between the shipyard and the To Kau Wan works area.  The contaminated material in the trucks shall be covered with low permeability sheeting (i.e. HDPE) to prevent ingress of rainwater during transportation.

 

8.31        Additional precautions relating to the material handling and land transportation for dioxin-contaminated soil are recommended.  Roll-off trucks (containerised) are recommended to minimise the risk of material loss during material handling and transportation, particularly in the event of an incident. Direct loading of material into containers at the point of excavation is recommended to minimise double handling and any associated losses. The use of containers will also minimise the risk of material loss during transportation by road.   Contingency plans will need to be prepared by the Contractor to specify the accident response action, containment and retrieval procedure.

 

8.32        Assuming 6 to 10m3 capacity trucks the total number of laden truck movements of excavated non-dioxin contaminated material from CLS to TKW would be between 900 to 1,500.  On the basis that this excavation work was carried out over a period of 6 months this equates to around 6 to 10 truck loads per day.

 

8.33        The use of roll-off trucks (containerised) have been assumed for dioxin-contaminated material shipments. These containers would be reused after each shipment. The size of containers varies and a rated capacity between 6m3 and 12m3 has been assumed. Allowing for a shipment of between 6m3 and 12m3 (11.3 tonnes to 22.7 tonnes) of contaminated material and based on the estimated total volume of about 30,000m3 of dioxin-contaminated material, a total of between 2,500 and 5,000 truck loads would be required.  One the basis that excavation work was carried out over a 6 month period this equates to around 16 to 32 truck roads per day.

 

8.34        Storage: A number of factors could affect the method of storage of material contaminated with dioxin.  These include the need for and method and extent of transportation to the off-site treatment area, the available storage area and any potential need to move the material to an alternative treatment area.

 

The most economic method of storage is to stockpile the contaminated material in earth bunds covered by impermeable membranes to prevent wind erosion and exposure to rain.  An impermeable base and drainage system is also required to collect the contaminated leachate.   In this case the impermeable base could be formed using a reinforced concrete slab graded to drain leachate through filter membranes to channels and catchpits.  The slab would provide a practical hard surface for material handling whilst preventing leakage of any contaminated material.  The sides of the stockpiles could either be sloping at angles slightly less than the natural angle of repose of the contaminated material, or be formed using reinforced concrete walls to minimise storage space requirements.

Containerised storage of dioxin-contaminated material has been considered. This could involve the use of standard 20ft long containers. The contents of contaminated material may vary according to the type of container used. For the purpose of this estimate the volume of contaminated material has been assumed to be 11.7cum (24 tonnes including container self weight). The number of containers required for the total 30,000m3 quantity of dioxin contaminated material would therefore be 2,564. These could be stacked 3 containers high (2.59 x 3 = 7.8m) in a block formation occupying a total net area of 1.3ha. The stacking of these containers could be carried using a standard reach stacker or a fork lift truck. The stacking area could be formed using a gravel bed foundation or using a sealed pavement.

The containers would need to be scrapped after proper decontamination at the end of the project because of the health risks from dioxin contamination and the relatively high cost of verifying the effectiveness of any container cleansing works at the end of the project.

The stockpile method would involve forming a stockpile on a paved area. The side slopes of the stockpile would need to be around 30 degrees to horizontal to maintain adequate stability. Assuming a total height of the stockpile of 3 metres, a total net area of 1.5ha would be required.

8.35        The use of controlled stockpiling A more land use efficient method of storage would use a stockpile contained within a reinforced concrete storage bin area has been recommended. Assuming a height of 3 metres for the surrounding wall and a free stockpile height above the top of the wall of an additional 3 metres, the net area required for storage would be 0.66 ha. The storage bin solution preferred where site area is limited because of the more efficient use of available landuse.

 

The containerised storage option is not preferred because the containers would require either extensive cleaning and testing to verify they were completely decontaminated and suitable for general reuse or scrapping at the end of the project.  The use of storage bins are also not preferred because of the larger volume of C&D material generated from the demolition of the retaining walls around the bin.  Given that adequate space exists at To Kau Wan, the controlled stockpile storage method is preferred.

8.36        To further reduce impacts on air quality, the use of a structure over the storage area has been included. The proposed scheme involves a storage height of 5 metres with additional height for headroom and a roof. The roof structure would be in place prior to the deposition, storage or removal of material from the storage building.

 

8.37        Only one-sided operation is provided for within the storage building.  The roofing will protect against rain and wind and as such, rainwater will not enter the storage area but will be diverted to the sides of the building and  collected in gutters and drain pipes and discharged into the stormwater drainage system.

 

8.38        For the bulk storage of general contaminated material for solidification only, a stockpile is proposed for storage up to an overall height of 5 metres over a net storage area of 1.0ha. Material stored to the design height shall be covered using a low permeability sheeting.

 

Treatment Area

8.39        As discussed in Sections 3 and 4, the off-site treatment area will be temporarily used for stockpiling of contaminated and treated soil, and soil remediation including biopiling, solidification and thermal desorption.  Chemical wastes/ by-products will be generated from such operations and processes.  During soil handling and transportation, spillage or leakage may occur resulting the potential contamination of the surfaces of housing unit.  The bin structure for stockpiles, containment structure and concrete floor at the treatment site shall be decontaminated after completion of remediation.  It is recommended that these structures be decontaminated by scabbling and then be discarded as normal C&D material.  The chemical deposits or residues from scabbling will be disposed of at CWTC for ultimate disposal. 

 

8.40        Note that the potential land pollution will be limited to the surfaces of the housing unit and will unlikely be extended to the subsurface strata as the whole site will be concrete paved, and the stockpiling areas will be lined and installed with proper containment structures. 

 

Off-Site Decontamination Works

8.41        Most of the soils after treatment will turn to clean inert materials suitable for public filling.  The condensate as the end product of the thermal desorption process and other chemical wastes (e.g. spent activated carbons & filters) generated shall be temporarily stored in a secure hut.  Such waste will be collected by licensed collectors and disposed of at the CWTC bi-daily to avoid bulk storage at treatment site.  Pending collection, the chemical waste shall be packaged and where necessary stored temporarily on-site in accordance with the Waste Disposal (Chemical Waste) (General) Regulation. 

 

8.42        It was known that the CWTC is able to handle the chemical wastes generated over the course of this Project. However, prior arrangement shall be made to avoid compromising the daily operation of CWTC.

 

Treatment of Oily Residue at CWTC

8.43        Though CWTC is designed to handle hazardous organic pollutants including PCB and dioxins, the following measures are proposed to ensure the handling of dioxin condensate arising from this Project will not compromise the performance & operation of CWTC:

·       A batch of the oily condensate will be sent to CWTC for a performance test and treatment shall begin only after performance tests have been passed. 

·       Treatment of condensate shall be in batches with a campaign every week or every two weeks. 

 

Precautionary Measures during Wet and Typhoon Seasons

8.44        The following measures are recommended to minimise the water quality impact at the treatment site during typhoon seasons:

·       Surface runoff from the treatment site shall be directed into storm drains via adequately designed sand/ silt removal facilities such as sand traps, silt traps and sediment basins.  Channels, earth bunds or sand bag barriers shall be provided on site to properly direct stormwater to such site removal facilities. 

·       Catch-pits and perimeter channels shall be constructed in advance of site preparation works. 

·       Open stockpiles on site shall be covered with tarpaulin during rainstorms.  Measures shall be taken to prevent the washing away of soil into any drainage system. 

·       The storage area for excavated soil from CLS shall be roofed and covered.  In addition, run-on/ run-off control elements shall be constructed.  Finally, the floor shall be concrete paved. 

·       A dedicated water treatment unit (standalone from the water treatment unit of the thermal desorption for polishing the aqueous condensate) shall be constructed for the treatment of contaminated run-off, leachate collected and decontamination water. 

 

Equipment Decontamination Requirement

8.45        For excavation and transport equipment at the CLS or treatment site, if it stays within the contaminated zone, such as excavation and stockpiling areas, it shall be decontaminated (typically steam cleaning) prior to leaving the contaminated zone.  The contaminated zone shall need to be clearly defined with fencing.  The exit of the contaminated zone shall have a decontamination pad for cleaning of the equipment before it leaves the zone.  The decontamination water shall be collected and disposed of at the on-site water treatment unit.  Care shall be exercised by the Contractor to prevent contamination of areas outside the contaminated zone. 

 

8.46        In treatment area, particularly for a large-scale ongoing operation, separate equipment shall be employed for transport of treated materials to prevent any potential for recontamination.  A “contaminated” loader shall load only the contaminated soils into the decontamination system, and a “clean” loader shall be assigned to remove the treated soils from the stockpile at the outlets of the decontamination systems.

 

8.47        Lining of trucks with plastic is recommended to prevent spills and leakage during transport.  Besides, draping of plastic over the sides of trucks can minimise the amount of soil accumulates on the outside of the body.  For transport within the contaminated zone, the cover fabrics/ plastic sheeting can be reused depending on the truck and cover configuration, otherwise they shall be dumped into landfill. 

 

8.48        No water discharge is allowed prior to on-site treatment.   


 

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1.1Demolition and Excavation Phase

Good Site Practice and Waste Reduction Measures

1.1It is not expected that adverse waste impacts would arise, provided that good site practice is strictly followed.  Recommendations for good site practice during the decommissioning and demolition activities include:

·Use waste haulier authorised or licensed to collect specific category of waste;

·Obtain the necessary registration and licences under the Waste Disposal Ordinance and the Waste Disposal (Chemical Waste) (General) Regulation from the Environmental Protection Department;

·nomination of an approved person, such as a site manager, to be responsible for good site practice, arrangements for collection and effective disposal to an appropriate facility, of all wastes generated at the site;

·training of site personnel in proper waste management and chemical waste handling procedures;

·provision of sufficient waste disposal points and regular collection for disposal;

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

·separation of chemical wastes for special handling and appropriate treatment at a licensed facility;

·regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors;

·a recording system for the amount of wastes generated, recycled and disposed of (including the disposal sites);

·In order to monitor the disposal of C&D and solid wastes at public filling facilities and landfills, and control fly-tipping, a trip-ticket system should be included as one of the contractual requirements and implemented by the Environmental Team.  One may make reference to WBTC No. 5/99 for details; and

·A Waste Management Plan (WMP) shall be prepared and this WMP shall be submitted to the Engineer for approval.  One may make reference to WBTC No. 29/2000 for details.

 

1.1Good management and control can prevent the generation of 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 practice.  Recommendations to achieve waste reduction include: 

·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;

·to encourage collection of aluminium cans by individual collectors, separate labelled bins shall be provided to segregate this waste from other general refuse generated by the work force;

·any unused chemicals or those with remaining functional capacity shall be recycled;

·use of reusable non-timber formwork to reduce the amount of C&D material;

·prior to disposal of C&D waste, it is recommended that wood, steel and other metals shall be separated for re-use and / or recycling to minimise the quantity of waste to be disposed of to landfill;

·proper storage and site practices to minimise the potential for damage or contamination of construction materials; and

·plan and stock construction materials carefully to minimise the amount of waste generated and avoid unnecessary generation of waste.

 

1.1In addition to the above good site practice and waste reduction measures, specific mitigation measures are recommended below for the identified waste arising to minimise environmental impacts during handling, transportation and disposal of these wastes.

Waste Recycling

1.1To minimise the amount of disposal to landfill, the general refuse (not contaminated) should be reuse and recycle as much as practical.  Waste sorting and segregation should be carried out in accordance with the following categories for recycling:

·Plastic bag;

·Plastic bottle;

·Plastic packaging;

·Other plastic;

·Rubber;

·Paper;

·Cardboard;

·Wood/ timber;

·Glass;

·Textile;

·aluminium can;

·Steel metal;

·Ferrous metal; and

·Non-ferrous metal. 

Asbestos

1.1The handling and disposal of asbestos wastes should follow the Code of Practice on the Handling, Transportation and Disposal of Asbestos Waste.  

Contaminated Residues or Deposits

1.1Prior to the disposal of residues and deposits, sampling should be carried out to characterise the nature of these wastes.  Pending the receipt of analytical results, the Contractor should shall propose appropriate handling and disposal protocols for the Engineer’s approval.  The temporary storage of these wastes should be in accordance with the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. 

Chemical Waste

1.1Removal Sequence: To avoid disturbance of potential chemical waste during building demolition, all movable objects including sand/ grit/ deposits inside the building under demolition shall be cleared in advance.  “Movable objects” shall mean all items inside the building other than those belong parts of the building structure or are anchored firmly on the building structure/ existing ground. All movable objects including sand/ grit/ deposits shall be treated as chemical wastes and placed in drums and delivered to a centralised covered area on site.  No mixing or off-site disposal of the waste shall be allowed.  The non-removable objects shall be covered with the heavy-duty polythene sheets and remained throughout the Project.  Transportation and storage of the waste shall be in accordance with the relevant chemical waste regulations.  Particularly the requirement of spill prevention measures, worker protection (e.g. PPE) and proper segregation from other wastes shall be observed. Whereas all other chemical wastes outdoors shallwill be left untouched throughout the Project.

 

1.1Workers involved in the handling of chemical waste shallould be suitably trained and should wear appropriate protective masks and clothing when handling such materials.  Chemical wastes shallould  be handled according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.  Spent chemicals shallould  be stored and collected by an approved operator a licensed collector for disposal at a licensed facility in accordance with the Chemical Waste (General) Waste Disposal (Chemical Waste) (General) Regulation.

1.1Containers used for the storage of chemical waste shallould:

·Be suitable for the substance they are holding, resistant to corrosion, maintained in good condition, and securely closed;

·Have a capacity of less than 450 litres unless the specifications have been approved by the EPD; and

·Display a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the Regulations.

 

1.1The storage area for chemical waste shallould:

·Be clearly labelled and used solely for the storage of chemical waste;

·Be enclosed on at least 3 sides;

·Have an impermeable floor and bunding, of capacity to accommodate 1100% of the volume of the largest container or 20% by volume of the chemical waste stored in that area, whichever is the greatest;

·Have adequate ventilation;

·Be covered to prevent rainfall entering (water collected within the bund must be tested and disposal as chemical waste if necessary); and

·Be arranged so that incompatible materials are adequately separated.

 

1.1Disposal of chemical waste shallould:

·Be via a licensed waste collector; and

·Be a facility licensed to receive chemical waste, such as the Chemical Waste Treatment Facility which offers a chemical waste collection service and can supply the necessary storage containers; or

·Be a reuser of the waste, under approval Be a recycler of the waste, with waste disposal licence from the EPD.

Contaminated C&D Waste (Building Indoor Surfaces)

1.1Building sampling should be carried out prior to demolition to characterise the contaminants present on the building surfaces and identify suitable regents for decontamination.  After contaminants characterisation, a Decommissioning Plan should be prepared by the specialist Contractor recommending the indoor remediation protocols for the approval of Engineer.  In general, the building decontamination may include the following processes:

·Power washing;

·Scabbling;

·Grit blasting; and

·Confirmation testing. 

1.1However, power washing and grit blasting will produce secondary wastes, so scabbling is the preferred method of cleaning.  To ensure effective and proper cleaning, adequate on-site supervision by competent personnel is required. 

1.1After completion of building decontamination, the material can be discarded as normal C&D waste.  The decontamination water, containing the cleaning reagents, pollutants and residues, should be handled and disposed of in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.  

 

Uncontaminated C&D Waste

1.1The Contractor shallould separate the C&D waste including steel, timber and scrap metals from other wastes, as far as practical, and should arrange for recycling and reuse on site to the extent possible.   To maximise landfill life, Government policy discourages the disposal of C&D wastes with more than 20% inert material by volume (or 30% inert material by weight) at landfill.  Inert C&D material (public fill) is directed to reclamation areas or to an approved public filling area (PFA), where it has the added benefit of offsetting the need for removal of materials from borrow areas for reclamation purposes. Due to limited space at landfills, disposal at reclamation sites or a PFA would be the preferred method.

 

General Refuse

1.1General refuse should be stored in enclosed bins or compaction units separate from C&D and chemical wastes.  No open stockpile of general refuse is allowed on site to minimise potential water quality impact.  A reputable waste collector should be employed by the contractor to remove general refuse from the site, separately from C&D and chemical wastes, on a daily or every second day basis to minimise odour, pest and litter impacts. 

 

1.1Aluminium cans are often recovered from the waste stream by individual collectors if they are segregated or easily accessible, so separate labelled bins for their deposit should be provided if feasible. Site office waste can be reduced through recycling of paper if volumes are large enough to warrant collection.  Participation in a local collection scheme should be considered if one is available.

 

Slope Improvement Phase

1.1The excavated soil and rock should be reused/ recycled as much as practical (i.e. fill slope and restoration of CLS).  Surplus should be disposal of to public fill.  In addition, a Waste Management Plan shall be prepared by the Contractor in order to keep waste arising to a minimum and to ensure that waste us handled, transported and disposed of in a suitable manner.   

Remediation Phase

Cheoy Lee Shipyard Site

1.1On handling contaminated soil, especially of dioxin-contaminated, site workers and the backhoe operators shall be protected from skin contact and inhalation of soil gas.  The protection shall be achieved by providing each worker/ operator sufficient personal protective equipment, such as coverall, respirator, etc. and suitable prior training on handling contaminated waste.

1.1Chemical wastes shall be handled in compliance with the provisions of Chemical Waste Disposal (Chemical Waste) (General) Regulations.  The site contractors, workers and operatives shall also be required to follow appropriate procedures on handling chemical wastes according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

 

1.1While the APCO requires registered professionals to undertake the abatement work, the Waste Disposal Ordinance and the Waste Disposal (Chemical Waste) (General) Regulation provides control on the packaging, labelling, storage, collection and disposal of asbestos waste.  Asbestos wastes shall be handled in accordance with the Code of Practice on the Handling, Transportation and Disposal of Asbestos Waste issued by the Environment and Food Bureau.

 

1.1Asbestos waste, by definition under the Waste Disposal (Chemical Waste) (General) Regulation, is categorised as chemical waste of which the arrangement of production, collection and disposal will follow the ‘trip-ticket’ system as with other chemical wastes.  The registered asbestos contractor who is the waste producer shall appoint a licensed asbestos waste collector to collect the packaged asbestos waste and deliver to the designated landfill for disposal. Under the Waste Disposal Ordinance and Waste Disposal (Chemical Waste) (General) Regulation, directions of asbestos disposal shall be obtained from the EPD and prior arrangement with the landfill operator shall be made prior to the actual disposal.

 

Collection and Transportation of Wastes

1.1Dump trucks will be extensively used for the transit of waste between the excavation spot and the loading point/ the decontamination work.  The following precautionary measures shall be taken to avoid pour-out and wind erosion in transit.

·Never overload the dump truck to prevent spillage of  contaminated soil;

·Always cover the payload on each dump truck with strong tarpaulin sheet or the likes to withstand wind and rain while the truck is travelling; and

·Adequately but not excessively wet the payload to check the dust generation.

 

1.1For decontamination work accessible by sea, contaminated soils shall be carried by self propelled barge of around 50m overall length as opposed to a towed dumb barges to minimise the risk of incidents in transit.

·Precautionary measures as follows shall be taken at the barge loading point.

·Unloading of containers should be monitored to ensure that loss of material does not take place during transportation. 

·The decks of all barges and vessels will be kept tidy and free of oil or other substances or articles which might be accidentally or otherwise washed overboard

·The works should cause no visible foam, oil, grease, scum, litter or other objectionable matter to be present on the water at the loading and unloading berths

 

1.1The self-propelled barge would be able to navigate around North Lantau via the Kap Shui Mun Fairway and Ma Wan Channel in most conditions thereby minimising the trip distance and risks.  The self propelled barges could carry the waste in various arrangements depending on the type of waste. Contaminated soil earmarked for biopiling and (solidification) could be shipped in bulk, placed in the hold of a dumb barge typically up to around 50m overall length with a total capacity of 1,000m3 with appropriate cover such as HDPE sheeting securely fixed in position over the material in the hold to protect against wind and rain.  

 

1.1The containers for transporting dioxin-contaminated soils shall be able to be placed on their ends to allow an open sealable top for placement of soil.  This is to ensure that no emissions will come from the dioxin-contaminated soil waste during transport and storage.  In addition, should the containers fall into the sea during accidents, they can be retrieved without the loss of contaminants to the water column.

 

1.1When the barges approach the To Kau Wan Site, they should be kept away (minimum distance 100m) from the shore line on the east side of the site to avoid disturbance to the egrety. They should also travel at speeds lower than 10 knots within 500m of the egrety to minimise noise impacts.

 

1.1Finally, a contingency plan shall be prepared by the Contractor to spell out the necessary procedures to be taken and in case of accident and/ or emergency when transporting the contaminated soil to off-site location(s).  All responsible parties and/ or persons and their contact numbers should be listed in the plan. 

When the barges approach the To Kau Wan Site, thev should be kept away (minimim distance 100m) from the shore line on the east side of the site to avoid disturbance to the egrety. They should also travel at speeds lower than 10 knots within 500m of the egrety to minimize noise impacts.

Material Handling, Transportation and Storage

1.1The movement of contaminated material between the shipyard and the treatment area needs to be carried out in a controlled manner taking reasonable precautions to minimize potential losses that might otherwise have significant environmental impacts. The measures recommended need to take into account the degree of contamination of the material involved and the potential impact of losses. This section considers the requirements for material handling, transportation and storage in order to arrive at an appropriate scheme to minimise environmental risks in a cost effective manner.

 

 

9ECOLOGY Ecology

9.1           The ecological assessment in this report has revealed some families of rare restricted/protected plantss and fish species (Oryzias spp.curvinotus) in the Mong Tung Hang Stream will be impacted from the Project and mitigation measures have been recommended.  The mitigation measure includes transplantation, seed collection and pPlant storage and cCutting collection/cultivation for the rarestricted/protected plants and habitat recreation for the fish species in the Mong Tung Hang Stream. Figures 9.1 and 9.2 give the location of receptor site for transplanted plants and of recreated habitat for the fish species in the Mong Tung Hang Stream.

 

Monitoring and Maintenance of transplanted plants

9.2           To maximise success rate of relocation, the plants and their environment need to be carefully monitored after transplantation. The monitoring team shall include a suitably qualified botanistplant biologist with at least 3 years relevant experience, familiar with species in question and with a sound understanding of transplanting projects and previous vegetation monitoring experience. Additionally, the team should include a qualified horticulturist with at least 3 years practical experience, available to provide info on seed preservation and cultivation.

 

9.3           The receptor site shall be visited over a period of 3 years. Monitoring should be carried out twice weekly for first 24 months after transplanting, and once a month for the remainder of the programme.

Monitoring

9.4           Monitoring shall include:

 

·       Checking of the species composition, percentage coverage and condition of vegetation on each of the tagged areas of transplanted wetland and N.mirabilis plants;

·       Recording of the condition of the wetland/plants in terms of the presence of flowers/seeds, leaf colour, signs of disease/pests, signs of stress (e.g., resulting from lack of water/too much sunlight); and evidence of self regeneration;

·       Determining the abiotic factors including water quality parameters (water depth, dissolved oxygen, pH, salinity, temperature) and soil conditions; and

·       Recording of any signs of plant stress together with actions taken.

 

9.5           During monitoring, routine maintenance of the receptor site should be implemented. The most important maintenance tasks shall include:

 

·       Ensuring the wetlands/plants are receiving sufficient water

·       Controlling invasive plant species such as exotic climbers, which may smother the transplanted species.

 

9.6     Short reports containing results of field investigation and measurements should be prepared after each monthly survey. Submitted by the contractors monitoring team for review by the IECEATLIEC and EPD within 15 days of the end of the reporting month. Reports should contain details of:

 

-       Monitoring work undertaken during the reporting period;

-       Plant survival;

-       Signs of plant stress; and

-       Any management actions undertaken.

 

Remedial Measures

9.6           Routine monitoring and maintenance should ensure the wetland plants become successfully established at the receptor site. However, if large numbers of plants die back and do not re-grow, remedial strategies must be implemented. These strategies should include the germination of stored seeds, and the transplanting of stored plants and N.mirabilis cuttings from KFBG.

 

9.7           Remedial measures to be implemented at specific action levels are detailed below:

 

Less than 50% survival

·       Instigate germination of a portion of seed for the species in question, and arrange for the planting of stored plants/cultivated cuttings

·       Review the conditions at the receptor site to ensure it is still considered suitable for the species prior to replanting.

 

Less than 30% survival -

Very low survival levels may indicate that the receptor site is not suitable for the species in question. Therefore, other sites where the species of concern are known to occur should be identified and monitored, in order to:

 

·       document additional information on species preferences, flowering time and seed production;

·       collect seeds in a controlled manner to ensure that there is a genetic resource of this species;

·       undertake trials to grow seedlings of these rare species;

·       cultivate seedlings and replant species in alternative receptor sites;

·       ensure that plants of these target species at existing sites are adequately protected.

 

Monitoring of the Relocated Fish Species

9.8           Before relocation, the recreated habitat should be monitored to ensure that the habitat has been colonised by aquatic invertebrates and other organisms. It is important that O.curvinotus are moved to the recreated habitat following the completion of slope/fill works, and the construction of the channelised section of MTHS. Additionally, surveys of fauna (e.g., macroinvertebrates) in the recreated habitat should be conducted before the fish are re-located. The Rice-fish should only be relocated after the habitat has become established, and has been colonised by aquatic invertebrates and other organisms.

1.1           After relocation, the O.curvinotus population should be regularly monitored over a period of 1 year by a suitably qualified ecologist/biologist with 3 years relevant experience. Monitoring should be carried out every two weeks for the first three months after relocation, and monthly for the remainder of the monitoring period.

1.1            

9.9           (TO FOLLOW LATER)

 

10            ENVIRONMENTAL AUDITING

Site Inspections

10.1        Site inspections provide a direct means to track and ensure the enforcement of specified environmental protection and pollution control measures. The inspections should be undertaken routinely by the ETEMTET to ensure that appropriate environmental protection and pollution control mitigation measures are properly implemented. Additionally, the ETEMTET shall be responsible for defining the scope of the inspections, detailing any deficiencies that are identified, and reporting any necessary action or mitigation measures that were implemented as a result of the inspection.

 

10.2        Site inspections shall be carried out at least once per week. The areas of inspection should include the general environmental conditions in the vicinity of the site and the pollution control and mitigation measures within the site; it should also review the environmental conditions outside the site area which are likely to be affected, directly or indirectly, by site activities. The ETEMTET shall make reference to the following information in conducting the inspections:

 

·       the EIA and EM&A recommendations on environmental protection and pollution control mitigation measures;

·       ongoing results of the EM&A programme;

·       works progress and programme;

·       individual works method statements which shall include proposals on associated pollution control measures;

·       the contract specifications on environmental protection;

·       the relevant environmental protection and pollution control laws; and

·       previous site inspection results undertaken.

·       A monthly waste management audit will be carried out as part of the site audit programme.

 

10.3        The inspection results and their associated recommendations on improvements to the environmental protection and pollution control works shall be submitted to the Contractor, as appropriate, within 24 hours, for reference and for taking immediate action. They shall also be presented, along with the remedial actions taken, in the monthly EM&A report. The Contractor shall follow the procedures and time-frames stipulated in the environmental site inspection for the implementation of mitigation proposals and the resolution of deficiencies in the Contractor’ EMS. An action reporting system shall be formulated and implemented to report on any remedial measures implemented subsequent to the site inspections.

 

10.4        Ad hoc site inspections shall also be carried out by the ETEMTET if significant environmental problems are identified. Inspections may also be required subsequent to receipt of an environmental complaint, or as part of the associated investigation work.

 

Compliance with Legal and Contractual Requirements

10.5        There shall be contractual environmental protection and pollution control requirements, which the Contractor shall comply with, in addition to Hong Kong’s environmental protection and pollution control laws.

 

10.6        The ETEMTET shall review the progress and programme of the works to check that relevant environmental laws have not been violated, and that any foreseeable potential for violating the laws can be prevented.

 

10.7        The Contractor shall also make available for inspection relevant documents to the ETEMTET so that the checking and auditing process can be carried out. The relevant documents are expected to include the updated Work Progress Reports, the updated Works Programme, the application letters for different licences/permits under the environmental protection laws, and all the valid licences/permit. The site diary shall also be available, upon request, to the ETEMTET during his site inspection.

 

10.8        After reviewing the documentation, the ETEMTET shall advise the Contractor of any non-compliance with the contractual and legislative requirements on environmental protection and pollution control for them to take follow-up actions. If the ETEMTET’s review concludes that the current status on licence/permit application and any environmental protection and pollution control preparation works is incompatible with the works programme or may result in a potential violation of environmental protection and pollution control requirements by the works in due course, he shall also advise the Contractor accordingly.

 

10.9        Upon receipt of the advice, the Contractor shall undertake immediate action to remedy the situation. The Engineer shall follow up to ensure that appropriate action has been taken by the Contractor in order that the environmental protection and pollution control requirements are fulfilled.

 

Environmental Complaint

10.10     Complaints shall be referred to the Permit Holder who shall implement the complaint investigation procedures; which shall comprise the complaint event and action plan as stated in Appendix B.

 

10.11     During the complaint investigation work, the Contractor and Engineer shall co-operate with the ETEMTET and IECEATLIEC in providing all the necessary information and assistance for completion of the investigation. If mitigation measures are identified in the investigation, the Contractor shall promptly carry out the mitigation works. The Engineer shall ensure that the measures have been carried out by the Contractor.

 

 

11            REPORTING

General

11.1        Reports can be provided in an electronic medium upon agreeing the format with the ER and EPD.  This would enable a transition from a paper / historic and reactive approach to an electronic / real time proactive approach.  All the monitoring data (baseline and impact) shall also be made available through a dedicated internet website that would be agreed with relevant authority. i

 

11.2        Types of reports that the ETEMTET Leader shall prepare and submit include baseline monitoring report, monthly EM&A report, quarterly EM&A summary report and final EM&A review report.  In accordance with Annex 21 of the EIAO-TM, a copy of the monthly, quarterly summary and final review EM&A reports shall be made available to the Director of Environmental Protection.

 

Baseline Monitoring Report

11.3        The ETEMTET Leader shall prepare and submit a Baseline Environmental Monitoring Report within 10 working days of completion of the baseline monitoring.  Copies of the Baseline Environmental Monitoring Report shall be submitted to the Contractor, the IECEATLIEC, the ER and the EPD.  The ETEMTET Leader shall liaise with the relevant parties on the exact number of copies they require.  The report format and baseline monitoring data format shall be agreed with the EPD prior to submission.

 

11.4        The baseline monitoring report shall include at least the following:

 

(i)    up to half a page executive summary;

(ii)   brief 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:

·      monitoring methodology;

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

·      parameters monitored;

·      monitoring locations;

·      monitoring date, time, frequency and duration; and

·      quality assurance (QA) / quality control (QC) results and detection limits;

(v)   details of influencing factors, including:

·      major activities, if any, being carried out on the site during the period;

·      weather conditions during the period; and

·      other factors which might affect results;

(vi)   determination of the Action and Limit Levels for each monitoring parameter and statistical analysis of the baseline data, the analysis shall conclude if there is any significant difference between control and impact stations for the parameters monitored;

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

(viii)  comments, recommendations and conclusions.

 

Monthly EM&A Reports

11.5        The results and findings of all EM&A work required in the Manual shall be recorded in the monthly EM&A reports prepared by the ETEMTET Leader.  The EM&A report shall be prepared and submitted within 10 working days of the end of each reporting month, with the first report due the month after construction commences.  Each monthly EM&A report shall be submitted to the following parties: the Contractor, the IECEATLIEC, the ER and the EPD.  Before submission of the first EM&A report, the ETEMTET Leader shall liaise with the parties on the required number of copies and format of the monthly reports in both hard copy and electronic medium.

 

11.6        The ETEMTET leader shall 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

11.7        The first monthly EM&A report shall include at least the following :

(i)    executive summary (1-2 pages):

·      breaches of Action and Limit levels;

·      complaint log;

·      notifications of any summons and successful prosecutions;

·      reporting changes; and

·      future key issues.

(ii)   basic project information:

·      project organisation including key personnel contact names and telephone numbers;

·      programme;

·      management structure, and

·      works undertaken during the month;

(iii)   environmental status:

·      works undertaken during the month with illustrations (such as location of works, daily excavation rate, etc); and

·      drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations (with co-ordinates of the monitoring locations);

(iv)   a brief summary of EM&A requirements including:

·      all monitoring parameters;

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

·      Event-Action Plans;

·      environmental mitigation measures, as recommended in the project EIA study final report; and

·      environmental requirements in contract documents;

(v)   implementation status:

·      advice on the implementation status of environmental protection and pollution control / mitigation measures, as recommended in the project EIA;

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

·      monitoring methodology;

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

·      parameters monitored;

·      monitoring locations;

·      monitoring date, time, frequency, and duration;

·      weather conditions during the period;

·      any other factors which might affect the monitoring results; and

·      QA/QC results and detection limits;

(vii)  report on non-compliance, complaints, and notifications of summons and successful prosecutions:

·      record of all non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);

·      record of all complaints received (written or verbal) for each media, including locations and nature of complaints investigation, liaison and consultation undertaken, actions and follow-up procedures taken, results and summary;

·      record of all notification of summons and successful prosecutions for breaches of current environmental protection / pollution control legislation, including locations and nature of the breaches, investigation, follow-up actions taken, results and summary;

·      review of the reasons for and the implications of non-compliance, complaints, summons and prosecutions including review of pollution sources and working procedures; and

·      description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance;

(viii) others

·      an account of the future key issues as reviewed from the works programme and work method statements;

·      advice on the solid and liquid waste management status; and

·      comments (for examples, effectiveness and efficiency of the mitigation measures), recommendations (for example, any improvement in the EM&A programme) and conclusions.

 

Subsequent EM&A Reports

11.8        Subsequent monthly EM&A reports shall include the following :  

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

·      breaches of Action and Limit levels;

·      complaints log;

·      notifications of any summons and successful prosecutions;

·      reporting changes; and

·      future key issues.

(ii)   basic project information:

·      project organisation including key personnel contact names and telephone numbers;

·      programme;

·      management structure; and

·      work undertaken during the month;

(iii)   environmental status:

·      works undertaken during the month with illustrations (such as location of works, daily excavation rate, etc.); and

·      drawing showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations.

(iv)   implementation status:

·      advice on the implementation status of environmental protection and pollution control / mitigation measures, as recommended in the project EIA;

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

·      monitoring methodology;

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

·      parameters monitored;

·      monitoring locations;

·      monitoring date, time, frequency, and duration;

·      weather conditions during the period;

·      any other factors which might affect the monitoring results; and

·      QA / QC results and detection limits.

(vi)   report on non-compliance, complaints, and notifications of summons and successful prosecutions:

·      record of all non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);

·      record of all complaints received (written or verbal) for each media, including locations and nature of complaints investigation, liaison and consultation undertaken, actions and follow-up procedures taken, results and summary;

·      record of all notification of summons and successful prosecutions for breaches of current environmental protection / pollution control legislation, including locations and nature of the breaches, investigation, follow-up actions taken, results and summary;

·      review of the reasons for and the implications of non-compliance, complaints, summons and prosecutions including review of pollution sources and working procedures; and

·      description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance.

(vii)  others

·      an account of the future key issues as reviewed from the works programme and work method statements;

·      advice on the solid and liquid waste management status; and

·      comments (for examples, effectiveness and efficiency of the mitigation measures), recommendations (for example, any improvement in the EM&A programme) and conclusions.

(viii) appendix

·      Action and Limit levels;

·      graphical plots of trends of monitored parameters at key stations over the past four reporting periods for representative monitoring stations annotated against the following:

a)     major activities being carried out on site during the period;

b)    weather conditions during the period; and

c)     any other factors that might affect the monitoring results.

·      monitoring schedule for the present and next reporting period;

·      cumulative statistics on complaints, notifications of summons and successful prosecutions; and

·      outstanding issues and deficiencies.

 

Quarterly EM&A Summary Reports

11.9        A quarterly EM&A summary report of around 5 pages shall be produced and submitted within 15 working days of the end of last reporting month, The quarterly report and shall contain at least the following information:

 

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

(ii)   basic project information including a synopsis of the project organisation, programme, contacts of key management, and a synopsis of works undertaken during the quarter;

(iii)   a brief summary of EM&A requirements including:

·      monitoring parameters;

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

·      environmental mitigation measures, as recommended in the project EIA Final Report;

(iv)   advice on the implementation status of environmental protection and pollution control / mitigation measures, as recommended in the project EIA Final Report, summarised in the updated implementation schedule;

(v)   drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;

(vi)   graphical plots of any trends in monitored parameters over the past four months (the last month of the previous quarter and the present quarter) for representative monitoring stations annotated against:

·      the major activities being carried out on site during the period;

·      weather conditions during the period; and

·      any other factors which might affect the monitoring results;

(vii)  advice on the solid and liquid waste management status;

(viii) a summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);

(ix)   a brief review of the reasons for and the implications of any non-compliance, including a  review of pollution sources and working procedures;

(x)    a summary description of actions taken in the event of non-compliance and any follow-up procedures related to any earlier non-compliance;

(xi)   a summarised record of all complaints received (written or verbal) for each media, liaison and consultation undertaken, actions and follow-up procedures taken;

(xii)  comments (for examples, a review of the effectiveness and efficiency of the mitigation measures and the performance of the environmental management system, that is, of the overall EM&A programme); recommendations (for example, any improvement in the EM&A programme) and conclusions for the quarter; and

(xiii) proponents' contacts and any hotline telephone number for the public to make enquiries.

 

Final EM&A Review Reports

11.10     The final EM&A report shall ould be prepared and submitted within 20 working days of the end of last reporting month, it shall contain at least the following information:

 

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

(ii)   drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;

(iii)   basic project information including a synopsis of the project organisation, contacts of key management, and a synopsis of work undertaken during the course of the project or past twelve months;

(iv)   a brief summary of EM&A requirements including:

·      environmental mitigation measures, as recommended in the project EIA Report;

·      environmental impact hypotheses tested;

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

·      all monitoring parameters;

·      Event-Action Plans;

(v)   a summary of the implementation status of environmental protection and pollution control / mitigation measures, as recommended in the project EIA Report, summarised in the updated implementation schedule;

(vi)   graphical plots and the statistical analysis of the trends of monitored parameters over the course of the project, including the post-project monitoring for all monitoring stations annotated against:

·      the major activities being carried out on site during the period;

·      weather conditions during the period; and

·      any other factors which might affect the monitoring results;

(vii)  a summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit levels);

(viii) a review of the reasons for and the implications of non-compliance including review of pollution sources and working procedures as appropriate;

(ix)   a description of the actions taken in the event of non-compliance;

(x)    a summary record of all complaints received (written or verbal) for each media, liaison and consultation undertaken, actions and follow-up procedures taken;

(xi)   a summary record of notifications of summons and successful prosecutions for breaches of the current environmental protection / pollution control legislation, locations and nature of the breaches, investigation follow-up actions taken and results;

(xii)  a review of the validity of EIA predictions and identification of shortcomings in EIA recommendations; and

(xiii) comments (for examples, a review of the effectiveness and efficiency of the mitigation measures and of the performance of the environmental management system, that is, of the overall EM&A programme);

(xiv) recommendations and conclusions (for example, a review of success of the overall EM&A programme to cost-effectively identify deterioration and to initiate prompt effective mitigatory action when necessary).

 

Data Keeping

11.11     No site-based documents (such as monitoring field records, laboratory analysis records, site inspection forms, etc.) are required to be included in the monthly EM&A reports.  However, any such document shall be well kept by the ETEMTET Leader and be ready for inspection upon request.  Particularly, under WDO the Contractor shall keep trip-ticket records and also the relevant staff training record on site for inspection.  All relevant information shall be clearly and systematically recorded in the document.  Monitoring data shall also be recorded in magnetic media form, and the software copy must be available upon request.  Data format shall be agreed with the EPD.  All documents and data shall be kept for at least one year following completion of the construction contract.

 

Interim Notifications of Environmental Quality Limit Exceedances

11.12     With reference to the Event and Action Plan, when the environmental quality performance limits are exceeded, the ETEMTET Leader shall immediately notify the IECEATLIEC and EPD, as appropriate.   The notification shall be followed up with advice to IECEATLIEC and EPD on the results of the investigation, proposed actions and success of the actions taken, with any necessary follow-up proposals.  A sample template for the interim notifications is presented in Appendix EDC.

Table of Content

 

1 INTRODUCTION 1

Background 1

Purpose of the Manual 1

Proposed Works 2

Objectives of the Environmental Monitoring and Audit 3

2 ENVIRONMENTAL MANAGEMENT SYSTEM 4

Introduction 4

General 4

The EM&A Manual 4

Contractual Documentation 4

Revision of EM&A Manual 5

Environmental Management Plans 5

Environmental Performance Reviews 6

Construction Method Statement 6

3 ORGANISATION AND STRUCTURE OF THE EM&A 8

Introduction 8

Project Organisation 8

4 EM&A GENERAL REQUIREMENT 1011

Introduction 1011

General 1011

Environmental Monitoring 1011

Action and Limit Levels 1011

Event and Action Plans 1112

Site Inspections 1112

Enquiries, Complaints and Requests for Information 1213

Reporting 1213

Cessation of EM&A 1213

5 LAND CONTAMINATION 1314

Introduction 1314

Groundwater Recharge during Excavation 1314

Removal of Free Product Encountered during Excavation 1415

Confirmation Sampling /Testing for Soil Excavation 1516

Confirmation Sampling/Testing for Biopile Treatment 1617

Confirmation Sampling/Testing for Solidification Treatment 1718

Confirmation Sampling/Testing for Thermal Desorption Treatment 1819

6 AIR QUALITY MONITORING 2021

Introduction 2021

Methodology and Criteria 2021

Monitoring Equipment 2223

Laboratory Measurement/Analysis 2425

Monitoring Locations 2425

Baseline Monitoring 2627

Impact Monitoring 2627

Compliance Assessment 2829

Event and Action Plan (EAP) 2829

Mitigation Measures 3132

7 WATER QUALITY 3233

Introduction 3233

Monitoring Requirements 3233

Compliance Assessment and Action Plan 3233

Mitigation Measures 3334

8 WASTE MANAGEMENT 3435

Introduction 3435

Waste Control and Mitigation Measures 3435

Construction and Demolition Phase 3435

Slope Improvement Phase 3839

Remediation Phase 3839

9 ECOLOGY 4445

Monitoring and Maintenance of transplanted plants 4445

Monitoring of the Relocated Fish Species 4546

10 ENVIRONMENTAL AUDITING 4748

Site Inspections 4748

Compliance with Legal and Contractual Requirements 4849

Environmental Complaint 4849

11 REPORTING 4950

General 4950

Baseline Monitoring Report 4950

Monthly EM&A Reports 5051

Quarterly EM&A Summary Reports 5354

Final EM&A Review Reports 5455

Data Keeping 5657

Interim Notifications of Environmental Quality Limit Exceedances 5657

455555667799914151515171919212123232627272727282929292933333939404242434344444445484951511 INTRODUCTION

Background

Purpose of the Manual

Proposed Works

Objectives of the Environmental Monitoring and Audit

2 ENVIRONMENTAL MANAGEMENT SYSTEM

Introduction

General

The EM&A Manual

Contractual Documentation

Revision of EM&A Manual

Environmental Management Plans

Environmental Performance Reviews

Construction Method Statement

3 ORGANISATION AND STRUCTURE OF THE EM&A

Introduction

Project Organisation

4 EM&A GENERAL REQUIREMENT

Introduction

General

Environmental Monitoring

Action and Limit Levels

Event and Action Plans

Site Inspections

Enquiries, Complaints and Requests for Information

Reporting

Cessation of EM&A

5 LAND CONTAMINATION

6 AIR QUALITY MONITORING

Introduction

Demolition & Excavation Phase Monitoring

Remediation Phase Monitoring

Baseline Monitoring

Impact Monitoring

Stack Monitoring

Compliance Assessment

Event and Action Plan (EAP)

Mitigation Measures

7 WATER QUALITY

Introduction

Water Quality Mitigation Measures

Water Quality Monitoring

8 WASTE MANAGEMENT

Introduction

Waste Control and Mitigation Measures

9 ECOLOGY

Monitoring and Maintenance of transplanted plants

Monitoring of the Relocated Fish Species

10 ENVIRONMENTAL AUDITING 41

Site Inspections 41

Compliance with Legal and Contractual Requirements 42

Environmental Complaint 42

11 REPORTING 43

General 43

Baseline Monitoring Report 43

Monthly EM&A Reports 44

Quarterly EM&A Summary Reports 47

Final EM&A Review Reports 48

Data Keeping 50

Interim Notifications of Environmental Quality Limit Exceedances 50

1 INTRODUCTION 1

Background 1

Purpose of the Manual 1

Proposed Works 2

Objectives of the Environmental Monitoring and Audit 3

2 ENVIRONMENTAL MANAGEMENT SYSTEM 4

Introduction 4

General 4

The EM&A Manual 4

Contractual Documentation 4

Revision of EM&A Manual 5

Environmental Management Plans 5

Environmental Performance Reviews 6

Construction Method Statement 6

3 ORGANISATION AND STRUCTURE OF THE EM&A 8

Introduction 8

Project Organisation 8

4 EM&A GENERAL REQUIREMENT 10

Introduction 10

General 10

Environmental Monitoring 10

Action and Limit Levels 10

Event and Action Plans 11

Site Inspections 11

Enquiries, Complaints and Requests for Information 12

Reporting 12

Cessation of EM&A 12

5 LAND CONTAMINATION 13

6 AIR QUALITY MONITORING 14

Introduction 14

Demolition & Excavation Phase Monitoring 14

Remediation Phase Monitoring 18

Baseline Monitoring 20

Impact Monitoring 20202021

Stack Monitoring 21

Compliance Assessment 21

Event and Action Plan (EAP) 22

Mitigation Measures 22

7 WATER QUALITY 23

Introduction 23

Water Quality Mitigation Measures 23

8 WASTE MANAGEMENT 27

Introduction 27

Waste Control and Mitigation Measures 27

9 ECOLOGY 39404034

Monitoring and Maintenance of transplanted plants 39404034

Monitoring of the Relocated Fish Species 40414135

10 ENVIRONMENTAL AUDITING 41424236

Site Inspections 41424236

Compliance with Legal and Contractual Requirements 42434337

Environmental Complaint 42434337

11 REPORTING 43444438

General 43444438

Baseline Monitoring Report 43444438

Monthly EM&A Reports 44454539

Quarterly EM&A Summary Reports 47484842

Final EM&A Review Reports 48494943

Data Keeping 49505044

Interim Notifications of Environmental Quality Limit Exceedances 50515044

1 INTRODUCTION 1-1

Background 1-1

Purpose of the Manual 1-1

Proposed Works 1-2

Objectives of the Environmental Monitoring and Audit 1-3

2 ENVIRONMENTAL MANAGEMENT SYSTEM 2-4

Introduction 2-4

General 2-4

The EM&A Manual 2-4

Contractual Documentation 2-4

Revision of EM&A Manual 2-5

Environmental Management Plans 2-5

Environmental Performance Reviews 2-6

Construction Method Statement 2-6

3 ORGANISATION AND STRUCTURE OF THE EM&A 3-8

Introduction 3-8

Project Organisation 3-8

4 EM&A GENERAL REQUIREMENT 4-12

Introduction 4-12

General 4-12

Environmental Monitoring 4-12

Action and Limit Levels 4-12

Event and Action Plans 4-13

Site Inspections 4-13

Enquiries, Complaints and Requests for Information 4-13

Reporting 4-14

Cessation of EM&A 4-14

5 Land Contamination 5-15

6 Air Quality Monitoring 6-16

Introduction 6-16

Demolition & Excavation Phase Monitoring 6-16

Remediation Phase Monitoring 6-20

Baseline Monitoring 6-22

Impact Monitoring 6-22

Compliance Assessment 6-23

Event and Action Plan (EAP) 6-23

Mitigation Measures 6-24

7 WATER QUALITY 7-25

Introduction 7-25

Water Quality Mitigation Measures 7-25

8 WASTE MANAGEMENT 8-26

Introduction 8-26

Waste Control and Mitigation Measures 8-26

9 Ecology 9-31

Monitoring and Maintenance of transplanted plants 9-31

Monitoring of the Relocated Fish Species 9-32

10 ENVIRONMENTAL AUDITING 10-33

Site Inspections 10-33

Compliance with Legal and Contractual Requirements 10-34

Environmental Complaint 10-34

11 REPORTING 11-35

General 11-35

Baseline Monitoring Report 11-35

Monthly EM&A Reports 11-36

Quarterly EM&A Summary Reports 11-39

Final EM&A Review Reports 11-39

Data Keeping 11-41

Interim Notifications of Environmental Quality Limit Exceedances 11-41

 

List of Tables

 

Table 1.1 Preliminary Project programme

Table 5.1 Event and Action Plan for the Groundwater Level Monitoring during Groundwater Recharge

Table 5.2 Event and Action Plan for Removal of Encountered Free Product during Excavation

Table 5.3 Event and Action Plan for Confirmation Sampling/Testing for Soil Excavation

Table 5.4 Event and Action Plan for Confirmation Sampling/Testing for Biopile Treatment

Table 5.5 Event and Action Plan for Confirmation Sampling/Testing for Solidification Treatment

Table 5.6 Event and Action Plan for Confirmation Sampling/Testing for Thermal Desorption Treatment

Table 5.7 Concerned Action Levels and Cleanup Targets for Soil Remediation

Table 6.1 Ambient Air Quality Monitoring Stations and their Commencement Time

Table 6.2 Impact ambient air monitoring programme

Table 6.3 Plant Emission Monitoring Requirements

Table 6.4 Proposed Action and Limit Levels for Ambient Monitoring

Table 6.5 Proposed Action and Limit Levels for Plant Emissions Monitoring

Table 6.9 Event / Action Plan for Ambient Air Quality Monitoring

Table 6.10 Event / Action Plan for Plant Emissions Monitoring

Table 7.1 Event and Action Plan for the Effluent Discharge Monitoring

 

 

List of Figures

 

Figure 1.1 Site Location Map

Figure 1.2 Locations of Air Quality Sensitive Receivers

Figure 1.3 Locations of Water Quality Sensitive receivers

Figure 1.4 Habitat Map – Cheoy Lee Shipyard

Figure 1.5 Habitat Map – To Kau Wan

Figure 5.1 Schematic of Groundwater Level Monitoring During Recharging

Figure 6.1 Typical Dioxins High Volume Air Sampler

Figure 6.2 Sampling Train for Stack Dioxin Sampling

Figure 6.32 Ambient Air Monitoring Station During Demolition and Excavation Phase Monitoring

Figure 6.3 Sampling Train for Stack Dioxin Sampling

Figure 6.4 Ambient Air Monitoring Station During Remediation Phase Monitoring

 

 

List of Appendices

 

Appendix A Implementation Schedule of Mitigation Measures

Appendix B Event/ Action Plan for Air Quality

Appendix CB Sample Data Sheets for Air Quality Monitoring

Appendix DC Sample Template for the Interim Notification

 

 

 

 

 

 

 


[1] Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air.: Method TO-9A, Second Edition, U. S. Environmental Protection Agency, EPA/625/R-96/010b, January 1999.

[2] Determination of Polychlorinated Dibenzo-p-dioxins and Polychlorinated Dibenzofurans from Municipal Waste Combustors, USEPA Method 23.


[1] Determination of Polychlorinated Dibenzo-p-dioxins and Polychlorinated Dibenzofurans from Municipal Waste Combustors, USEPA Method 23.