Content


Chapter    Title                                                                                                                           Page

1.1              Background to the Project_______________________________________________________ 1

1.2              Coverage of this EM&A Report___________________________________________________ 1

1.3              Project Management Organisation________________________________________________ 1

1.4              Project Programme____________________________________________________________ 1

1.5              Works Undertaken in the Reporting Month__________________________________________ 1

2.1              Summary of EM&A Requirements_________________________________________________ 5

2.2              Environmental Quality Performance Limits__________________________________________ 5

2.3              Event and Action Plans_________________________________________________________ 5

2.4              Implementation of Environmental Mitigation Measures_________________________________ 5

3.1              Impact Monitoring Schedule_____________________________________________________ 7

3.2              Monitoring Methodology________________________________________________________ 7

3.2.1           24-hour TSP Monitoring________________________________________________________ 7

3.2.1.1         Installation__________________________________________________________________ 7

3.2.1.2         Preparation of Filter Papers_____________________________________________________ 7

3.2.1.3         Field Monitoring______________________________________________________________ 7

3.2.1.4         Maintenance and Calibration____________________________________________________ 8

3.2.2           1-hour TSP Mointoring_________________________________________________________ 8

3.2.2.1         Field Monitoring______________________________________________________________ 8

3.2.2.2         Maintenance and Calibration____________________________________________________ 8

3.3              Monitoring Equipment__________________________________________________________ 8

3.4              Equipment Calibration_________________________________________________________ 9

3.5              Result of Impact Monitoring______________________________________________________ 9

3.5.1           Air Quality (1-hr TSP)___________________________________________________________ 9

3.5.2           Air Quality (24-hr TSP)__________________________________________________________ 9

4.1              Environmental Meetings_______________________________________________________ 10

4.2              Status of Environmental Submissions, Permits and Licences__________________________ 10

4.3              Waste Management Status_____________________________________________________ 10

4.4              Review of Environmental Monitoring Procedures____________________________________ 11

4.5              Implementation Status of Environmental Mitigation Measures__________________________ 11

5.1              Site Environmental Audit_______________________________________________________ 12

5.2              Site Effluent Discharge/WPCO Effluent Discharge___________________________________ 12

6.1              Summary of Environmental Complaints, Notifications of Summons and Successful Prosecutions__________________________________________________________________________ 13

6.2              Environmental Enquiries_______________________________________________________ 13

6.3              Environmental Events_________________________________________________________ 13

6.4              Environmental Exceedance/Non-compliance_______________________________________ 13

6.4.1           Air Quality – Dust_____________________________________________________________ 13

6.4.2           Waste Management__________________________________________________________ 13

6.4.3           Summary of Exceedances_____________________________________________________ 13

7.1              Key Issues and Recommendations for Coming Month________________________________ 14

7.1.1           Air________________________________________________________________________ 14

7.1.2           Noise_____________________________________________________________________ 14

7.1.3           Water_____________________________________________________________________ 14

7.1.4           Waste_____________________________________________________________________ 14

7.1.5           Asbestos and Dioxin__________________________________________________________ 14

7.1.6           Contaminated Land__________________________________________________________ 15

8.1              Conclusions________________________________________________________________ 16

8.2              Recommendations___________________________________________________________ 16

Appendices                                                                                                                               17

Appendix A.  Environmental Quality Performance Limits_________________________________________ 18

Appendix B.  Event and Action Plans________________________________________________________ 19

Appendix C.  Schedule of Mitigation Measures from the EIA/ EM&A Manual and Event Contingency Plan for Environmental Complaints_____________________________________________________ 21

Appendix D.  EM&A Schedule_____________________________________________________________ 27

Appendix E.  Air Quality Monitoring Results and Graphical Presentation_____________________________ 28

Appendix F.  Calibration Certificates________________________________________________________ 32

Appendix G.  Works Programme___________________________________________________________ 38

Appendix H.  Weather Information from HKO__________________________________________________ 41

 

Tables

Table 2.1:__ Summary of Impact EM&A Requirements_ 5

Table 3.1:__ TSP Monitoring Equipment 8

Table 3.2:__ Equipment Calibration Frequencies_ 9

Table 3.3:__ Results of 1-Hour TSP Impact Monitoring_ 9

Table 3.4:__ Results of 24-Hour TSP Impact Monitoring_ 9

Table 4.1:__ Status of Environmental Submissions, Permits and Licences_ 10

Table 4.2:__ Monthly Summary Waste Flow Table for 2011_ 11

Table 5.1:__ Summary of Environmental Site Inspections_ 12

Table 6.1:__ Summary of Environmental Complaints and Prosecutions_ 13

Table 6.2:__ Summary of Exceedances_ 13

Table B.1:__ Event and Action Plan for Air Quality 19

Table C.1:__ Implementation Schedule of Recommended Mitigation Measures From the EIA_ 21

Table C.2:__ Event Contingency Plan for Environmental Complaints_ 25

 

Figures

Figure 1.1:_ Layout Plan of Work Site and the Environs_ 3

Figure 1.2:_ Project Organisation Chart 4

Figure 2.1:_ Location of Air Quality (Dust) Monitoring Station_ 6

 


Executive Summary


The Environmental Monitoring and Audit (EM&A) programme for this Project commenced on 1 December 2007. This is the 39th Monthly EM&A Report which presents a summary of the environmental monitoring and audit works, list of activities, and mitigation measures implemented during the reporting month of February 2011.

The following activities have taken place during the reporting month: -

¡      Excavation for Ground Decontamination Works within contaminated area and uncontaminated area;

¡      Operation and maintenance of the biopile decontamination system for Biopile No. 1 (for soil contaminated with hydrocarbon) and Biopile No. 2 (for soil contaminated with hydrocarbon and heavy metal);

¡      Backfilling within contaminated area; and

¡      Downsizing and sorting of the inert construction and demolition (C&D) materials by site crusher.

Impact monitoring for air quality (dust) due to the demolition, excavation and backfilling work and handling of inert C&D materials continued during the reporting month. No exceedance of the Action and Limit Levels for dust was recorded.

No environmental complaint, notification of summons and prosecution was received or made against the Project in the reporting month.

Site inspection was carried out on a weekly basis to monitor proper implementation of environmental pollution control and mitigation measures for the Project. In this reporting month, site inspections were carried out on 10, 17 and 24 February 2011.

No non-compliances with regard to site environmental audits were recorded in this reporting month.

As per the EM&A Manual, baseline 1-hour and 24-hour Total Suspended Particulates (TSP) monitoring was conducted during the period of 31 October 2007 to 13 November 2007. Results were reported in the Baseline Monitoring Report submitted in November 2007.

Future key issues to be considered in the forthcoming month (March 2011) include: -

¡      Excavation for Ground Decontamination Works within contaminated area and uncontaminated area;

¡      Cement solidification of the soil contaminated with heavy metal;

¡      Demolition of Boundary Wall;

¡      Operation and maintenance of the biopile decontamination system for Biopile No. 1 (for soil contaminated with hydrocarbon) and Biopile No. 2 (for soil contaminated with hydrocarbon and heavy metal);

¡      Backfilling within contaminated area;

¡      Disposal of the asbestos cement water pipes and related wastes to South East New Territories (SENT)  Landfill at Tseung Kwan O by marine transport; and

¡      Downsizing and sorting of the inert construction and demolition (C&D) materials by site crusher.

 

 


1.               Introduction


1.1               Background to the Project

This Project – “Demolition of Kwai Chung Incineration Plant” – is a Designated Project defined under the Environmental Impact Assessment Ordinance (EIAO, Cap 499). An Environmental Impact Assessment (EIA) Report for the Project, including an Environmental Monitoring and Audit (EM&A) Manual, was completed in September 2001 and approved by the Environmental Protection Department (EPD) on 9 January 2002. An Environmental Permit (EP) was issued on 1 March 2002 [Permit No. EP-121/2002]. Subsequently, an application for Variation of the Environmental Permit (VEP) (Application No. VEP-284/2009) was submitted on 6 April 2009 and the amended Environmental Permit [Permit No. EP-121/2002/A] was issued on 28 April 2009.

This Contract [No.: CV/2007/06] for the Project was awarded to the Contractor – China International Water & Electric Corporation (CIWE Corp.) – and commenced on 31 October 2007. The main Contract will last for 45 months excluding 12 months for landscape establishment works.  In accordance with Condition 1.11 of Environmental Permit No. EP-121/2002/A, the Director of Environmental Protection (DEP) was notified that the commencement date for the Project was on 24 January 2008.

The scope of the Project includes demolition and clearance of the existing chimney, buildings and ancillary structures above the existing concrete ground slab where the former Kwai Chung Incineration Plant (KCIP) is located. It also includes the removal of asbestos containing materials (ACM) and dioxin/furan contaminated materials (DCM) prior to demolition of structures and subsequent site remediation.

A layout plan of the Project site and the environs are presented in Figure 1.1.

The Project Proponent – Civil Engineering and Development Department (CEDD) – has commissioned Mott MacDonald Hong Kong Limited (MMHK) and Hyder Consulting Limited (Hyder) as the Environmental Team (ET) and the Independent Environmental Checker (IEC) respectively to undertake the Environmental Monitoring and Audit (EM&A) programme described in the approved EM&A Manual of the Project. CEDD has also commissioned MMHK as the Engineer’s Representative (ER) for all Project-related works.

1.2               Coverage of this EM&A Report

The EM&A programme for this Project commenced on 1 December 2007. This report presents a summary of the environmental monitoring and audit works, list of activities, and mitigation measures implemented during the reporting month of February 2011. This is the 39th Monthly EM&A Report for the project.

1.3               Project Management Organisation

The project organisation chart is presented in Figure 1.2.

1.4               Project Programme

This Contract of the Project commenced on 31 October 2007.  The main Contract will last for 45 months.  

1.5               Works Undertaken in the Reporting Month

The following activities have taken place during the reporting month: -

¡      Excavation for Ground Decontamination Works within contaminated area and uncontaminated area;

¡      Operation and maintenance of the biopile decontamination system for Biopile No. 1 (for soil contaminated with hydrocarbon) and Biopile No. 2 (for soil contaminated with hydrocarbon and heavy metal);

¡      Backfilling within contaminated area; and

¡      Downsizing and sorting of the inert construction and demolition (C&D) materials by site crusher.

 

 


Figure 1.1:     Layout Plan of Work Site and the Environs


Figure 1.2:     Project Organisation Chart

 

 

2.               EM&A Requirements


2.1               Summary of EM&A Requirements

The EM&A programme requires environmental monitoring of air quality and waste management as specified in the approved EM&A Manual (dated September 2001).

1-hour Total Suspended Particulates (TSP) and 24-hour TSP levels at one dust monitoring station are to be taken during the course of dusty work in every reporting month. This air quality monitoring station for 24-hour TSP and 1-hour TSP measurements is shown in Figure 2.1 below.

A summary of impact EM&A requirements is presented in Table 2.1.

Table 2.1:      Summary of Impact EM&A Requirements

Parameters

Descriptions

Locations

Frequencies

Duration

Air Quality

24-Hour TSP

1 Location - A1

Once every 6 days

During dust generating construction works

1-Hour TSP

1 Location - A1

3 times every 6 days

During dust generating construction works

Waste

On-Site Waste Audit

Active Work Sites

Weekly

During Construction

On-Site Waste Inspection

Wastewater

On-Site Wastewater Audit

Active Work Sites

Weekly

During Construction

General Site Conditions

Environmental Site Inspection

Works areas and areas affected by works

Weekly

During Construction

Note:        A1 – Boundary of the site adjacent to the Kwai Chung Primary Treatment Plant.

2.2               Environmental Quality Performance Limits

Environmental Quality Performance Limits for air quality are shown in Appendix A.

2.3               Event and Action Plans

The Event and Action Plans for air quality are shown in Appendix B.

2.4               Implementation of Environmental Mitigation Measures

The Contractor is required to implement mitigation measures listed in the latest EP, EIA Report and EM&A Manual. During routine site inspections, the Contractor's implementation of mitigation measures, if any, are to be inspected and reviewed. A schedule of the implementation of mitigation measures identified at the EIA stage is given in Appendix C.

 


Figure 2.1:     Location of Air Quality (Dust) Monitoring Station

 

 

3.               Monitoring Results


3.1               Impact Monitoring Schedule

Regular site inspections were carried out on 10, 17 and 24 February 2011 in the reporting month to assess the compliance with environmental requirements. The EM&A schedule is given in Appendix D.

Impact monitoring for air quality (dust) due to the demolition, excavation and backfilling work and handling of inert C&D materials continued during the reporting month.

3.2               Monitoring Methodology

3.2.1           24-hour TSP Monitoring

3.2.1.1         Installation

The High Volume Sampler (HVS) has been installed close to representative air sensitive receivers.  The following criteria have been considered in the installation of the HVS:

¡      A horizontal platform with appropriate support to secure the sampler against gusty wind was provided.

¡      The distance between the HVS and any obstacles, such as buildings, was at least twice the height of the obstacle protruding above the HVS.

¡      A minimum of 2 m separation from walls, parapets and penthouse was required for rooftop sampler.

¡      No furnace or incinerator flues were nearby.

¡      Airflow around the sampler was unrestricted.

¡      Permission was obtained to set up the samplers and to obtain access to the monitoring stations.

¡      A secured supply of electricity is needed to operate the samplers.

3.2.1.2         Preparation of Filter Papers

¡      Glass fibre filters, G810 are to be labelled with sufficient filters that are clean and without pinholes.

¡      All filters are to be equilibrated in the conditioning environment for 24 hours before weighing. The conditioning environment temperature is to be around 25°C and not variable by more than ±3°C, the relative humidity (RH) is to be < 50% and not variable by more than ±5%.  A convenient working RH is 40%.

3.2.1.3         Field Monitoring

¡      The power supply is to be secured to ensure the HVS works properly.

¡      The filter holder and the area surrounding the filter are to be cleaned.

¡      The filter holder is to be removed by loosening the 4 bolts and a new filter, with stamped number upward, on a supporting screen to be aligned carefully.

¡      The filter is to be properly aligned on the screen so that the gasket forms an airtight seal on the outer edges of the filter.

¡      The swing bolts are to be fastened to hold the filter holder down to the frame.  The pressure applied is to sufficient to avoid air leakage at the edges.

¡      The shelter lid is then closed and is secured with the aluminium strip.

¡      The HVS shall be warmed-up for about 5 minutes to establish run-temperature conditions.

¡      A new flow rate record sheet is to be set into the flow recorder.

¡      The flow rate of the HVS is to be checked and adjusted at around 1.1 m3/min.  The range specified in the updated EM&A Manual is between 0.6-1.7 m3/min.

¡      The programmable timer is set for a sampling period of 24 hrs + 1 hr, and the starting time, weather condition and the filter number are to be recorded.

¡      The initial elapsed time is to be recorded.

¡      At the end of sampling, the sampled filter is to be removed carefully and folded in half length so that only surfaces with collected particulate matter are in contact.

¡      It was then placed in a clean plastic envelope and sealed.

¡      All monitoring information is to be recorded on a standard data sheet.

¡      Filters are to be sent to a Hong Kong Laboratory Accreditation Scheme (HOKLAS) accredited laboratory for analysis.

3.2.1.4         Maintenance and Calibration

¡      The HVS and its accessories are to be maintained in good working condition, such as replacing motor brushes routinely and checking electrical wiring to ensure a continuous power supply.

¡      Each HVS is to be calibrated at a bi-monthly intervals using GMW-25 Calibration Kit throughout all stages of the air quality monitoring.

 

3.2.2           1-hour TSP Mointoring

3.2.2.1         Field Monitoring

The measuring procedures of the 1-hour dust meter are to be in accordance with the Manufacturer’s Instruction Manual as follows:

¡      Set POWER to “ON”, push BATTERY button, make sure that the meter’s indicator is in the range with a red line and allow the instrument to stand for about 3 minutes. (Then, the air sampling inlet has been capped.)

¡      Push the knob at MEASURE position.

¡      Push “O-ADJ” button. (Then meter’s indication is 0).

¡      Push the knob at SENSI ADJ position and set the meter’s indication to S value described on the Test Report using the trimmer for SENSI ADJ.

¡      Pull out the knob and return it to MEASURE position.

¡      Push “START” button.

3.2.2.2         Maintenance and Calibration

¡      The 1-hour TSP meter would be checked at 3-month intervals and calibrated at 6-month intervals throughout all stages of the air quality monitoring.

 

As per the approved EM&A Manual, dust monitoring stations are located as shown in Figure 2.1 above.

 

3.3               Monitoring Equipment

The equipment used for air quality (dust) monitoring is listed in Table 3.1.

Table 3.1:      TSP Monitoring Equipment

Equipment

Model(s)

HVS Sampler

Greasby GMWS 2310 Accu-vol system

Calibrator

Tisch TE-5025A

1-hour TSP Dust Meter

TSI Model 8520 Dust Trak Aerosol Monitor

3.4               Equipment Calibration

The calibration frequencies of the monitoring equipment are provided in Table 3.2.

Table 3.2:      Equipment Calibration Frequencies

Equipment

Calibration Frequency

Calibration Due Date(s)

High Volume Sampler

Greasby GMWS 2310 Accu-vol system

Every two months

2 Mar 2011

1-hour TSP Dust Meter

Every six months

 

·          TSI Model 8520 Dust Trak Aerosol Monitor (serial number (S/N): 14230)

 

TSI (S/N 14230): 12 Apr 2011

·          TSI Model 8520 Dust Trak Aerosol Monitor (serial number: 15115)

 

TSI (S/N 15115): 6 Jul 2011

·          TSI Model 8520 Dust Trak Aerosol Monitor (serial number: 21672)

 

TSI (S/N 21672): 12 Apr 2011

·          SIBATA (serial number: 044870)

 

SIBATA (S/N 044870): 28 Mar 2011

The calibration certificates are included in Appendix F.

3.5               Result of Impact Monitoring

3.5.1           Air Quality (1-hr TSP)

Results of 1-hour TSP level are summarised in Table 3.3.   Detailed results, including weather conditions, and graphical presentations are included in Appendix E.

Table 3.3:      Results of 1-Hour TSP Impact Monitoring

Monitoring Station

1-hour TSP Range (µg/m3)

Action Level (µg/m3)

Limit Level (µg/m3)

A1

58 – 291

345

500

No exceedance of Action / Limit Levels for 1-hr TSP was recorded in all other data for the reporting month.

3.5.2           Air Quality (24-hr TSP)

Results of 24-hour TSP level are summarised in Table 3.4.  Detailed results, including weather conditions, and graphical presentations are included in Appendix E.

Table 3.4:      Results of 24-Hour TSP Impact Monitoring

Monitoring Station

24-hour TSP Range (µg/m3)

Action Level (µg/m3)

Limit Level (µg/m3)

A1

138 – 142

179

260

No exceedance of Action / Limit Levels for 24-hr TSP was recorded in all other data for the reporting month.

Wind data during the reporting month was obtained from the nearest Hong Kong Observatory (HKO) monitoring station, at Tsing Yi, and is presented in Appendix H.

 

4.               Project Environmental Status


4.1               Environmental Meetings

One environmental meeting was held on the day of the monthly site inspection on 17 February 2011.

4.2               Status of Environmental Submissions, Permits and Licences

A summary of status of all environmental submissions, permits, licences, and/or notifications to the Environmental Protection Department (EPD) for this Project during the reporting period is presented in Table 4.1 below.

Table 4.1:      Status of Environmental Submissions, Permits and Licences

Item

Description

Date of Application/ Submission

Status

1.

Environmental Permit (No. EP-121/2002/A) under Variation of Environmental Permit (No. VEP-284/2009)

VEP applied on 6 Apr 2009

 

VEP approved on 28 Apr 2009

 

2.

Billing Account under Waste Disposal (Charges for Disposal of Construction Waste) Regulation (Ref. No.: 7006285)

Approved on  16 Nov 2007

Valid

3.

Waste Management Plan for Demolition Works

v3.3 approved on 9 Apr 2009

 

v3.3: Valid

4.

Waste Management Plan for Ground Decontamination Works

v1.4 submitted on 4 May 2010

Approved by EPD on 28 May 2010

5.

Registration as a Chemical Waste Producer under Waste Disposal (Chemical Waste) (General) Regulation (Ref. No.: WPN-5292-320-C3459-01)

2 Nov 2007

Approved by EPD on 26 Nov 2007

6.

Effluent Discharge Licence (Ref. No.: EP760/320/0128821)

Variation of Licence submitted on 10 Nov 2008

Approved by EPD on 5 Jan 2009 which superseded the previous licence. Valid until 31 Mar 2013

7.

Notification pursuant to Section 3(1) of the Air Pollution Control (Construction Dust) Regulation (Form NA)

EPD notified on 15 Jan 2008

Valid

8.

Notification of commencement of asbestos abatement work pursuant to Section 73 of the Air Pollution Control Ordinance

EPD notified on 4 Feb 2008

Valid

Approved by EPD on 5 Mar 2008

9.

Construction Noise Permit for KCIP site    (Ref. No.: GW-RW0478-09)

21 Oct 2009

Issued by EPD on 4 Nov 2009

Expired on 31 Mar 2010

10.

Construction Noise Permit for KCIP site    (Ref. No.: GW-RW0561-10)

15 Oct 2010

Issued by EPD on 29 Oct 2010

Valid from 1 Nov 2010 to 30 Apr 2011

New submissions

 

 

 

No new submissions

 

 

4.3               Waste Management Status

The construction and demolition (C&D) material & general refuse generated by the Project in the reporting month are shown in Table 4.2 below. A trip ticket system has been implemented for all off-site waste disposals.

Table 4.2:      Monthly Summary Waste Flow Table for 2011

 

Actual Quantities of Inert C&D Materials Generated Monthly

(in ‘000 m3)

Actual Quantities of C&D Wastes Generated Monthly

 

Month

Total Quantity Generated

Broken Concrete

Reused in the Contract

Reused in other Projects

Disposed of at Public Fill

Metals

(‘000 kg)

Paper/ Cardboard

(‘000 kg)

Plastics

(‘000 kg)

Chemical waste

(‘000 kg)

Others (e.g. refuse)

(‘000 m3)

 

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Est.

Act.

Jan

3.94

0

0

0

3.94

0

0

0

0

0

0.10

28.28

0.01

0

0.01

0

0.55

1.748

0.05

0.005

Feb

3.94

0

0

0

3.94

0

0

0

0

0

0.10

5.55

0.01

0

0.01

0

0.55

0 *

0.05

0

Mar

1.97

 

0

 

1.97

 

0

 

0

 

0.10

 

0.01

 

0.01

 

3.55

 

0.05

 

Apr

1.97

 

0

 

1.97

 

0

 

0

 

0.10

 

0.01

 

0.01

 

0.55

 

0.05

 

May

3.06

 

0

 

3.06

 

0

 

0

 

0.10

 

0.01

 

0.01

 

0.55

 

0.05

 

Jun

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

0.55

 

0.05

 

Sub-total

14.88

0

0

0

14.88

0

0

0

0

0

0.50

33.83

0.06

0

0.06

0

6.30

1.748

0.30

0.005

Jul

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

0.55

 

0.05

 

Aug

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

0.55

 

0.05

 

Sep

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

3.55

 

0.05

 

Oct

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

0.55

 

0.05

 

Nov

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

0.50

 

0.05

 

Dec

0

 

0

 

0

 

0

 

0

 

0

 

0.01

 

0.01

 

0.50

 

0.50

 

Total

14.88

 

0

 

14.88

 

0

 

0

 

0.50

 

0.12

 

0.12

 

12.50

 

1.05

 

* Note:     No asbestos containing materials (ACM) or dioxin/furan contaminated materials (DCM) were generated from the site and disposed of during the reporting month.

4.4               Review of Environmental Monitoring Procedures

The monitoring works conducted by the Environmental Team have been reviewed regularly. No changes in the environmental monitoring procedures are considered necessary at this stage.

4.5               Implementation Status of Environmental Mitigation Measures

An Implementation Schedule of Mitigation Measures from the EIA / EM&A Manual has been given in Appendix C.

 

5.               Audit Findings


5.1               Site Environmental Audit

Site inspection is to be carried out on a weekly basis to monitor proper implementation of environmental pollution control and mitigation measures for the Project. In this reporting month, one monthly site inspection was carried out jointly by the ER, Contractor, ET Leader and IEC on 17 February 2011, and additional weekly site inspections were carried out by the ER, Contractor and ET on 10 and 24 February 2011.

Major findings provided by ET and those jointly provided by the ET and IEC on 17 February 2011 from the site inspections are summarised in Table 5.1.

Table 5.1:      Summary of Environmental Site Inspections

Date of Inspection

Major Observations

Status

10 Feb 2011

The new location of the chemical waste store was on uneven ground. The Contractor is asked to provide a level and stable surface for this facility as soon as possible.

The additional containers of chemicals were removed from the chemical waste store and the provision of drip trays for the other containers was considered adequate, as observed on 3 Mar 2011. (closed)

17 Feb 2011

The Contractor was reminded to provide additional tarpaulin covering for all excavated C&D material stockpiles.

Tarpaulin covering was provided for the remaining excavated C&D material stockpiles, as observed on 3 Mar 2011 (closed)

24 Feb 2011

No new observations.

N/A

5.2               Site Effluent Discharge/WPCO Effluent Discharge

An effluent discharge licence under the Water Pollution Control Ordinance (WPCO, Cap 358) was initially granted by EPD on 10 March 2008 and was subsequently replaced by another one issued on 8 July 2008. In order to cope with the site condition in late 2008, the Contractor applied for a second variation of WPCO effluent discharge licence on 10 November 2008 and the revised licence was granted on 5 January 2009.  

No effluent discharge sampling was carried out in this reporting month. It will be followed-up and updated in the coming EM&A report (March 2011).

 

6.               Environmental Complaints and Non-compliance


6.1               Summary of Environmental Complaints, Notifications of Summons and Successful Prosecutions

No environmental complaints have been received during the reporting month. Appendix C presents the environmental complaint event contingency plan of the Project and Table 6.1 presents a statistics of complaints, notification of summons and successful prosecution since the commencement of the Project.

Table 6.1:      Summary of Environmental Complaints and Prosecutions

Complaints Logged

Summons Served

Successful Prosecutions

Feb 2011

Cumulative

Feb 2011

Cumulative

Feb 2011

Cumulative

0

0

0

0

0

0

No environmental complaint, notification of summons and prosecution has been received or made against the Project in this reporting month.

6.2               Environmental Enquiries

No environmental enquiries were received during the reporting month.

6.3               Environmental Events

No unusual events were recorded during the reporting month.

6.4               Environmental Exceedance/Non-compliance

6.4.1           Air Quality – Dust

No exceedance of Action and Limit Levels for 1-hour TSP and 24-hour TSP was recorded in the data received for the reporting month.

6.4.2           Waste Management

Not applicable.

6.4.3           Summary of Exceedances

Table 6.2 summarises the total number of exceedances for air quality recorded during the reporting period. No exceedance was recorded in the data received for the reporting period.

Table 6.2:      Summary of Exceedances

Parameters

Total no. of Measurements

Action Level Exceedance

% of Action Level Exceedance

Limit Level Exceedance

% of Limit Level Exceedance

Air Quality

16

0

0%

0

0%

 

                                                                                                                                                                                

7.               Future Key Issues


7.1               Key Issues and Recommendations for Coming Month

Key issues to be considered in the forthcoming month (March 2011) include: -

¡      Excavation for Ground Decontamination Works within contaminated area and uncontaminated area;

¡      Cement solidification of the soil contaminated with heavy metal;

¡      Demolition of Boundary Wall;

¡      Operation and maintenance of the biopile decontamination system for Biopile No. 1 (for soil contaminated with hydrocarbon) and Biopile No. 2 (for soil contaminated with hydrocarbon and heavy metal);

¡      Backfilling within contaminated area;

¡      Disposal of the asbestos cement water pipes and related wastes to South East New Territories (SENT) Landfill at Tseung Kwan O by marine transport; and

¡      Downsizing and sorting of the inert construction and demolition (C&D) materials by site crusher.

Based on the above key issues, the recommended mitigation measures to be implemented include the following: -

7.1.1           Air

¡      Water spraying during demolition works;

¡      Reduce drop height during material handling or wall felling;

¡      Covers for dusty stockpiles and all generated C&D materials as soon as they are formed or moved;

¡      Haul road watering and vehicle wheel wash prior to exit; and

¡      All plant to be maintained to prevent any undue air emissions.

7.1.2           Noise

¡      All plants shall be maintained to prevent any undue noise nuisance; and

¡      Use quiet plants during breaking of concrete slab and structures and other C&D materials, whenever possible.

7.1.3           Water

¡      All wheel wash water shall be diverted to a sediment pit before discharge;

¡      All fuel cans, generators shall be placed within a bunded area; and any fuel spills shall be mopped up or excavated and disposed of as necessary;

¡      All ponding water shall be cleared as soon as possible; and

¡      All water dewatered from contaminated area(s) shall be properly handled and treated before discharge, and that such discharge should be kept to minimum. Surplus water arising from dewatering is to be collected on site for re-use where possible.

7.1.4           Waste

¡      Different types of waste should be segregated, stored, transported and disposed of in accordance with the relevant legislative requirements and guidelines; and

¡      Records of quantities of wastes generated, recycled and disposed (with locations) shall be kept.

7.1.5           Asbestos and Dioxin

¡      Removal, handling, transportation and disposal of the asbestos containing materials (ACM) and dioxin/furan contaminated materials (DCM) in line with the Air Pollution Control Ordinance (APCO, Cap 311) and Waste Disposal Ordinance (WDO, Cap 354).

7.1.6           Contaminated Land

¡      The preferred approach with least environmental impact is to cause minimal disturbance to the ground conditions, immobilise the contaminated soils where necessary and make provision for the protection of workers;

¡      During excavation and treatment of contaminated soil material, skin contact with the soil and groundwater shall be avoided given the potential for the presence of Total Petroleum Hydrocarbons (TPH);

¡      Exposure to dusty material shall also be avoided and dust shall be controlled at source by damping techniques; and

¡      Bunded areas shall be provided for the treatment operations on contaminated soil.

 

8.               Conclusions and Recommendations


8.1               Conclusions

Environmental monitoring and audit was performed in February 2011 during which site works have continued. All monitoring and audit results in the reporting month were checked and reviewed.

With respect to audit observations, the Contractor was reminded to provide sufficient dust suppression measures during dust generating activities (which include stockpiling, handling and movement of inert C&D materials). Proper bunding measures for containers of chemicals inside the chemical waste store should also be implemented.

Airborne dust monitoring continued due to the ongoing dust-generating works during the reporting month. In general, the Contractor has been reasonably responsive to all required mitigation measures and ET’s recommendations made during weekly environmental site inspections in this reporting month.

No environmental complaints, notification of summons or successful prosecutions have been received or made against this Project in this reporting month.

8.2               Recommendations

No further recommendations made at this stage pending more site progress achieved.

 

 

 

 

 

Appendices


Appendix A.  Environmental Quality Performance Limits_____________________________________________ 18

Appendix B.  Event and Action Plans____________________________________________________________ 19

Appendix C.  Schedule of Mitigation Measures from the EIA/ EM&A Manual and Event Contingency Plan for Environmental Complaints____________________________________________________________________ 21

Appendix D.  EM&A Schedule_________________________________________________________________ 27

Appendix E.  Air Quality Monitoring Results and Graphical Presentation_________________________________ 28

Appendix F.  Calibration Certificates____________________________________________________________ 32

Appendix G.  Works Programme_______________________________________________________________ 38

Appendix H.  Weather Information from HKO_____________________________________________________ 41

 

 

 

 

 

 

Appendix A.                   Environmental Quality Performance Limits

 

 

 

 

 

Action and Limit Levels for 24-hour TSP

 

Monitoring Station

Action Level (mg/m3)

Limit Level (mg/m3)

A1

179

260

 

Action and Limit Levels for 1-hour TSP

 

Monitoring Station

Action Level (mg/m3)

Limit Level (mg/m3)

A1

345

500

 

 

 

Appendix B.                   Event and Action Plans

 

 

 

 

 

Table B.1:      Event and Action Plan for Air Quality

EVENT

ACTION

 

ET

IEC

ER

CONTRACTOR

ACTION LEVEL

 

 

 

 

1. Exceedance for one sample

1. Identify source

2. Inform IEC and ER

3. Repeat measurement to confirm finding

4. Increase monitoring frequency to daily

1. Check monitoring data submitted by ET

2. Check Contractor’s working method

1. Notify Contractor

2. Check monitoring data and Contractor's working methods

1. Rectify any unacceptable practice

2. Amend working methods if appropriate

2. Exceedance for two or more consecutive samples

1. Identify source

2. Inform IEC and ER

3. Repeat measurements to confirm findings

4. Increase monitoring frequency to daily

5. Discuss with Contractor , IEC and ER for remedial actions required

6. If exceedance continues, arrange meeting with IEC and ER

7. If exceedance stops, cease additional monitoring

1. Checking 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 failure in writing

2. Notify Contractor

3. Check monitoring data and Contractor's working methods

4. Discuss with IEC and Contractor on potential remedial actions

5. Ensure remedial actions properly implemented

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

2. Implement the agreed proposals

3. Amend proposal if appropriate

LIMIT LEVEL

ET

IEC

ER

CONTRACTOR

1. Exceedance for one sample

1. Identify source

2. Inform ER and EPD

3. Repeat measurement to confirm finding

4. Increase monitoring frequency to daily

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

1. Checking 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 failure in writing

2. Notify Contractor

3. Check monitoring data and Contractor's working methods

4. Discuss with ET Leader and Contractor potential remedial actions

5. Ensure remedial actions properly implemented

1. Take immediate action to avoid further exceedance

2. Submit proposals for remedial actions to ER 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. Identify source

2. Inform IEC, ER and EPD the causes & actions taken for the exceedances

3. Repeat measurement to confirm findings

4. Increase monitoring frequency to daily

5. Investigate the causes of exceedance, Contractor’s working procedures to identify possible mitigation

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

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

8. If exceedance stops, cease additional monitoring

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

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

3. Supervise the implementation of remedial measures

1. Confirm receipt of notification of failure in writing

2. Notify Contractor

3. Carry out analysis of Contractor's working procedures with IEC to determine possible mitigation to be implemented

4. Discuss amongst Environmental Team Leader and the Contractor potential remedial actions

5. Review Contractor's remedial actions whenever necessary to assure their effectiveness

6. 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 ER 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

 

 

 

Appendix C.                  Schedule of Mitigation Measures from the EIA/ EM&A Manual and Event Contingency Plan for Environmental Complaints

 

 

 

 

 

 

 

Table C.1:     Implementation Schedule of Recommended Mitigation Measures From the EIA

No.

Activity

Mitigation/EIA Recommendations

Responsibility for Implementation (1)

Location/ Duration completion of measures

Implementation Stage (2)

Relevant Guidelines/ Legislation (4)

Implementation Status (3)

1

Ash Disposal

 

 

 

 

 

 

I

Treatment

Reconfirm extent of contaminated ash deposits by sampling for dioxins and furans.  Handling, transportation and disposal of the ash waste in line with relevant regulations.  Collection, immobilisation and testing of waste for disposal to landfill shall be carried out according to the relevant regulations and recommendations of the EIA including immobilisation by collection and mixing the ash material with cement.  Pilot mixing and Toxicity Characteristic Leaching Procedure (TCLP) tests should establish the ratio of cement to ash to the satisfaction of EPD.  Ash waste to be treated and placed into steel drums lined with plastic sheeting.  The drums should be adequately sealed and in new or good condition.  Prior agreement of the disposal criteria from EPD and agreement to disposal from the landfill operator must be obtained.

CEDD’s Contractor

KCIP work areas. Duration of the ash removal

A@

1, 10, EIA

4

II

Disposal

To monitor the disposal of waste at landfills, a “trip-ticket” system (WBTC No. 5/99) for all solid waste transfer/disposal operations should be implemented.  The system should be included as a contractual requirement, and monitored by the Environmental Team and audited by the Independent Checker (Environment).

CEDD’s Contractor

As above

A

1, 5, 9

4

III

Asbestos Removal

An asbestos abatement programme should be submitted to EPD for approval prior to the commencement of the asbestos abatement work.

CEDD and Contractor

As above

A

4

4

2

Demolition

 

 

 

 

 

 

A1

Non-blasting Methodology

Demolition by Non-Blasting Methodology Only.  All structures and buildings should be demolished and removed prior to demolition of chimneys

CEDD

KCIP work areas. Duration of the demolition

C#

8

4

A2

Waste Management Plan

A Waste Management Plan shall be submitted to EPD for approval.  The Waste Management Plan shall include, but not be limited to, the findings of the Waste Management Paper of the EIA, the types, quantities, disposal methods, timing, and locations of final disposition, responsibilities for implementation and the possible recycling and reuse of wastes generated.

CEDD and Contractor

Prior to commence­ment of the demolition works

Prior to C#

1

4

B

Material Storage

Covers for dusty stockpiles and control of dust emissions from construction (demolition) works requires appropriate dust control measures to be implemented in accordance with the requirements in the Air Pollution Control (Construction Dust) Regulation.

CEDD’s Contractor

KCIP work areas. Duration of the demolition

C

4

4, REC

C

Vehicle movement

Haul road watering, vehicle wheel wash prior to exit. Where practical, access roads should be protected with crushed gravel.

CEDD’s Contractor

As above

C

4

4

D

Plant maintenance

All plant shall be maintained to prevent any undue air emissions.

CEDD’s Contractor

As above

Prior to start of works

4

4

E

Demolition Techniques

Selection of non-blasting demolition techniques to minimise noise and vibration. 

CEDD’s Contractor

As above

C

8

4

F

Plant maintenance

 

All plant shall be maintained to prevent any undue noise nuisance.

CEDD’s Contractor

As above

C

2, 3

4

G

Wheel wash

All wheel wash water shall be diverted to a sediment pit.

CEDD’s Contractor

As above

C

5

4

H

Sediment control

Sediment removal facilities shall provided and be maintained and excavated as necessary to prevent sedimentation of channels.  Perimeter channels should be provided. Works should be programmed for the dry season where feasible.  Environmental guidelines for the handling and disposal of discharges from construction sites, as stipulated in the Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94) to be followed.

CEDD’s Contractor

As above

C

5, 12

4

I

Surface water diversion

All clean surface water shall be diverted around the site.

CEDD’s Contractor

As above

C

5, 12

4

J

Fuel can storage

All fuel cans shall be placed within a bunded area. Any fuel spills shall be mopped up as necessary.

CEDD’s Contractor

As above

C

5,6

4

K

Material, plant movement & fuel can filling.

Any fuel or oil spills shall be excavated and disposed of.

CEDD’s Contractor

As above

C

6,7

4

L

Generators

All generators shall be placed within a bunded area. Any fuel spills shall be mopped up as necessary.

CEDD’s Contractor

As above

C

5,6,7

4

M

Material containers

All empty bags and containers shall be collected for disposal.

CEDD’s Contractor

As above

C

6,7

4

N

Worker generated litter and Waste

Litter receptacles shall be placed around the site. Litter shall be taken regularly to the refuse collection points. Chemical toilets (or suitable equivalent) should be provided for workers. Any canteens should have grease traps.

CEDD’s Contractor

As above

C

6

4

O

Neighbourhood nuisance

All complaints regarding construction works shall be relayed to the environmental team.

CEDD’s Contractor

As above

C

1, 6

4

P

Legal requirements

Different types of waste should be segregated, stored, transported and disposed of in accordance with the relevant legislative requirements and guidelines

CEDD’s Contractor

As above

C

1,6

4

Q

On-site separation

On-site separation of municipal solid waste and construction/demolition wastes shall be conducted in order to minimise the amount of solid waste to be disposed to landfill.

CEDD’s Contractor

As above

C

1, 11

4

R

Temporary storage area

Separated wastes should be stored in different containers, skips, or stockpiles to enhance reuse or recycling of materials and encourage their proper disposal.

CEDD’s Contractor

As above

C

1, 11

4

S

Record of wastes

Records of quantities of wastes generated, recycled and disposed (with locations) shall be kept.

CEDD’s Contractor

As above

C

1, 9

4

T

Trip-ticket system

To monitor the disposal of waste at landfills and control fly-tipping, a “trip-ticket” system under Works Bureau Technical Circular (WBTC) No. 5/99 for all solid waste transfer/disposal operations should be implemented.  The system should be included as a contractual requirement, and monitored by the Environmental Team and audited by the Independent Checker (Environment).

CEDD’s Contractor

As above

C

1, 9

4

3

Soil Remediation Phase

 

 

 

 

 

 

U

B, C, D, F, G, I, J, K, L, M, N, O, P, Q, R, S and T as above

As above (see W for soil remediation).

As above

As above

R

As above

P, REC

V

De-watering

Collect and recycle extracted groundwater and leachate by mixing with cement for soil remediation.  Environmental guidelines for the handling and disposal of discharges from construction sites, as stipulated in the Practice Note for Professional Persons, Construction Site Drainage (ProPECC PN 1/94) to be followed.  Any surplus groundwater and leachate requiring disposal to be disposed of under the relevant legislation or treated to meet the standards given in Table 9a of the WPCO TM.

CEDD’s Contractor

KCIP work areas. Duration of the soil remediation

R

5

4

W

Immobilisation

Immobilisation and testing of waste soil shall be carried out according to the relevant regulations and recommendations of the EIA including immobilisation by collection and mixing the contaminated soil material with cement.  Pilot mixing and TCLP tests should verify the effectiveness and establish the ratio of cement to soil to the satisfaction of EPD.  Reassurance confirmatory sampling shall be carried out to confirm the extent of contamination.  Soil waste to be cast in blocks and replaced in the ground.  Extracted soils and materials and stabilisation/solidification to be conducted in bunded area to prevent surface run-off.  See also item 2(H) above.  Final soil decontamination report to be submitted to EPD.

CEDD’s Contractor

As above

R

1, 10

P

4

Monitoring and Audit

To be carried out in accordance with the Schedule in the EM&A Manual.

CEDD* / Contractor / Resident Site Supervisor (RSS)

KCIP works areas.

During demolition and at end of demolition throughout execution of Remediation Action Plan

C

1

4

Notes:   (1)     Responsibility for Implementation:

                         *     Normally undertaken by a specialist monitoring team employed directly by the proponent and audited by the Independent Checker (Environment).

                (2)     Implementation Stage:

@   A = during ash removal (before demolition)

#    C = during construction (i.e. demolition phase)

*     R = during soil remediation phase (after demolition)

                (3)     Implementation Status:

4   implemented            Ï   not implemented            P    partially implemented              REC   rectified by Contractor

(REC)   partially rectified by Contractor                    !      pending Contractor’s rectification action              

N/A      not applicable

(4)   Relevant Guidelines / Legislation references:

1.        Environmental Impact Assessment Ordinance Technical Memorandum (EIAO-TM)

2.        Noise Control Ordinance

3.        The ProPECC Note PN2/93 (Construction Noise daytime limits)

4.        Air Pollution Control Ordinance (APCO, Cap. 311)

5.        Water Pollution Control Ordinance (WPCO) (Cap. 358)

6.        Waste Disposal Ordinance (WDO, Cap. 354)

7.        Waste Disposal (Chemical Waste) (General) Regulation (Cap. 354)

8.        Draft Code of Practice on Demolition of Buildings (BD, 1998)

9.        Works Bureau Technical Circular (WBTC) No. 5/99, Trip-ticket System for Disposal of Construction and Demolition Material

10.     Guidance Notes for Investigation and Remediation of Contaminated Sites

11.     Works Bureau Technical Circular No. 5/98, On Site Sorting of Construction Waste on Demolition Sites

12.     ProPECC Note PN 1/94 Construction Site Drainage

 

Table C.2:     Event Contingency Plan for Environmental Complaints     

Step

Day

Action

Contractor

ER

ET

IEC

1

1

Party receiving complaint shall create a new complaint record. If the Contractor receives a complaint, he shall pass the information to the ER. 

¨

¨

¨

 

2

1

ER to ensure details of complaint provided to Contractor (if complaint not originally received by the Contractor), ET and IEC

 

¨

 

 

3

2

Within 1 working day after the receipt of the Notification of Complaint, provide ER relevant works site information, e.g. types and locations of construction works.

¨

 

 

à

4

2

Investigate the complaint to determine its validity, and to assess whether the source of the problem is due to the works activities.  Report the validity of the complaint to ER.

 

 

 

¨à

5

2

If complaint is valid and due to works, ER shall notify the Contractor.  If complaint is invalid or not due to works, Go to Step 12.

 

¨

 

 

6

2

Propose mitigation measures to ER within 1 working day of the receipt of the Notification.

¨

 

 

à

7

2

Review and agree with the proposed mitigation measures and make recommendations where necessary.

 

¨à

 

¨à

8

2

Implement the mitigation measures once they have been agreed.

¨

 

 

 

9

4

Audit the implementation of the proposed mitigation measures on site within 2 working days after measures have been agreed.

 

¨à

 

¨à

10

-

Undertake additional monitoring to verify the situation where necessary.

 

 

¨

 

11

4

Report the investigation results and subsequent actions taken to ER within 2 working days after the implementation of mitigation measures.

¨

 

¨

 

12

5

Respond to the complainant within 1 working day after receiving the investigation report.

 

¨

 

 

13

25

If no further comments or complaints are received from the complainant within 20 working days after responding to the complainant, close the complaint record.  If the complainant has further comments or complaints on the same issue, notify other parties on the same day and go to step 2.

 

¨

 

¨à

Notes:   ¨       Action Party

à           Enter comments/ proposals into appropriate complaint record where applicable

 

 

 

Appendix D.                  EM&A Schedule

 

 

 

 

 

 

 

Appendix E.                   Air Quality Monitoring Results and Graphical Presentation

 

 

 

 

 

 

 

Appendix F.                   Calibration Certificates

 

 

 

 

 

 

 

Appendix G.                 Works Programme

 

 

 

 

 

 

 

Appendix H.                  Weather Information from HKO

 

 

 

 

 

This Appendix presents wind data obtained from the nearest Hong Kong Observatory (HKO) monitoring station, at Tsing Yi.