Civil
Engineering and Development Department
Land Works Division
2/F, Civil Engineering and
Homantin,
Demolition of Buildings and Structures in the
Proposed Kennedy Town Comprehensive Development Area Site
Environmental
Permit No.
EP-136/2002/B
Monthly EM&A Report
for November
2008
(Phase 1 Part 1) Rev A
Report No.: 203204/EM&A/14/A
December 2008
Mott MacDonald Hong Kong Limited
7/F,
Tsim Sha
Tsui,
Tel: 2828 5757
Fax: 2827 1823
This document has been
prepared for the titled project or named part thereof and should not be relied
upon or used for any other project without an independent check being carried
out as to its suitability and prior written authority of Mott MacDonald Hong
Kong Limited (“Mott MacDonald”) being obtained.
Mott MacDonald accepts no responsibility or liability for the
consequence of this document being used for a purpose other than the purposes
for which it was commissioned. Any
person using or relying on the document for such other purpose agrees, and will
by such use or reliance be taken to confirm his agreement to indemnify Mott
MacDonald for all loss or damage resulting therefrom. Mott MacDonald accepts no responsibility or
liability for this document to any party other than the person by whom it was
commissioned.
To the extent that this
report is based on information supplied by other parties, Mott MacDonald accepts
no liability for any loss or damage suffered by the client, whether contractual
or tortious, stemming from any conclusions based on
data supplied by parties other than Mott MacDonald and used by Mott MacDonald
in preparing this report.
Pursuant to
Condition 1.10, 2.3 and 3.5 of the Environmental Permit
EP-136/2002/B
This Monthly
EM&A Report (November
2008) for Phase 1 Part 1
has been reviewed, certified and
verified by
the following EM&A members
Certified by:
Joseph Chan
Environmental
Team (ET) Leader
Mott
MacDonald Hong Kong Limited
Date 12
December 2008
Verified by:
Independent
Environmental Checker (IEC)
Hyder Consulting Limited
Date 12
December 2008
List of Contents Page
EXECUTIVE
SUMMARY iv
1. INTRODUCTION 1-1
1.1 Background to the Project............................................................................... 1-1
1.2 Coverage of this EM&A
Report...................................................................... 1-1
1.3 Project Management Organisation................................................................... 1-1
1.4 Project Program............................................................................................. 1-2
1.5 Works Undertaken during the
Reporting Month................................................ 1-2
2. EM&A Requirements 2-1
2.1 Summary of EM&A
Requirements.................................................................. 2-1
2.2 Environmental Quality
Performance Limits....................................................... 2-1
2.3 Event Action Plan........................................................................................... 2-1
2.4 Implementation of Environmental
Mitigation Measures...................................... 2-2
3. Monitoring Results 3-1
3.1 Impact Monitoring Schedule............................................................................ 3-1
3.2 Monitoring Methodology.................................................................................. 3-1
3.3 Monitoring Equipment..................................................................................... 3-4
3.4 Equipment Calibration..................................................................................... 3-5
3.5 Results of Impact Monitoring........................................................................... 3-6
4. Project Environmental Status 4-1
4.1 Environmental Meetings.................................................................................. 4-1
4.2 Status of Environmental
Submissions, Permits and Licenses.............................. 4-1
4.3 Waste Management Status.............................................................................. 4-2
4.4 Review of Environmental
Monitoring Procedures.............................................. 4-2
4.5 Implementation Status of
Environmental Mitigation Measures............................ 4-2
5. Audit Findings 5-1
5.1 Site Environmental Audit................................................................................. 5-1
5.2 Condition of Identified Surface
Cracks............................................................. 5-2
5.3 Site Effluent Discharge/WPCO Effluent
Discharge.......................................... 5-2
6. Environmental COMPLAINTS AND
NON-COMPLIANCE 6-1
6.1 Summary of Environmental
Complaints, Notifications of Summons and Successful Prosecutions 6-1
6.2 Environmental Enquires................................................................................... 6-1
6.3 Environmental Events..................................................................................... 6-1
6.4 Environmental Exceedance/
Non-compliance................................................... 6-1
7. future key issues 7-1
7.1 Key Issues and Recommendations
for Coming Month....................................... 7-1
8. conclusion and recommendation 8-1
8.1 Conclusions.................................................................................................... 8-1
8.2 Recommendations.......................................................................................... 8-1
List of Appendices
Appendix
A.......... Environmental Quality
Performance Limits
Appendix B.......... Event
and Action Plans
Appendix C.......... Schedule
of Mitigation Measures from the EIA/ EM&A Manual
Appendix D.......... EM&A
Schedule
Appendix E.......... Air
Quality Monitoring Results and Graphical Presentation
Appendix F.......... Airborne
Fibre Monitoring Results
Appendix G.......... Noise
Monitoring Results and Graphical Presentation
Appendix I........... Calibration
Certificates
Appendix J........... Works
Programme
List of Tables
Table 2‑1............ Summary of Impact EM&A
Requirements.................................................. 2-1
Table
3‑1............ TSP Monitoring Equipment.......................................................................... 3-5
Table
3‑2............ Airborne Fibre Monitoring
Equipment.......................................................... 3-5
Table
3‑3............ Noise Monitoring Equipment........................................................................ 3-5
Table 3‑4............ Equipment Calibration Frequencies............................................................ 3-5
Table 3‑5............ Results of 1-Hour TSP Impact Monitoring................................................... 3-6
Table 3‑6............ Results of 24-Hour TSP Impact Monitoring................................................. 3-6
Table 3‑7............ Result of Noise Monitoring........................................................................... 3-6
Table 3‑8............ Monthly Summary Waste Flow
Table for 2008........................................... 3-8
Table 4‑1............ Status of Environmental Submissions, Permits and
Licenses.................. 4-1
Table 5‑1............ Summary of Environmental Site Inspections.............................................. 5-1
Table
6‑1............ Summary of Environmental Complaints
and Prosecutions........................ 6-1
Table 6‑2............ Summary of Exceedances.......................................................................... 6-2
Table
B‑1............ Event/Action Plan for Air
Quality................................................................. B-1
Table B‑2............ Event/Action Plan for Noise Impact............................................................ B-2
Table
C‑3........... Implementation Schedule of
Recommended Mitigation Measures............ C-1
Table
C-4........... Implementation Schedule of
Recommended Mitigation Measures............ C-4
Table
C‑5........... Event Contingency Plan for
Environmental Complaints.......................... C-17
List of Figures
Figure 1.1........... Layout Plan of Work Site and Neighbouring Sensitive
Receivers
Figure 1.2........... Project Organisation Chart
Figure 2.1........... Location of Dust Monitoring Stations
Figure 2.2........... Location of Airborne Asbestos Fibre Monitoring
Stations
Figure 2.3........... Location of Noise Monitoring Stations
Figure 5.1........... Drainage Plan
The EM&A programme for this Project commenced on 28 Sep 2007. This report presents a summary of the environmental monitoring and audit results, list of activities, and mitigation measures implemented during the reporting month of November 2008.
This is the 14th Monthly EM&A Report for works carried out during the reporting month of November 2008.
The following construction activities have taken place during the reporting month: -
·
Demolition works at the Lairage
Block, Lairage Entrance Unit,
· Disposal of DCM to SENT Landfill Site; and
· Disposal of inert C&D materials to Tailor Recycled Aggregates Limited.
Removal works for asbestos containing materials (“ACM”) within the KTA and KTIP were completed on 31 July 2008, whereas removal works for dioxin/furan contaminated materials (“DCM”) were completed on 29 September 2008.
Throughout
the reporting month demolition works, as well as removal of inert C&D
material, took
place,
and air quality and noise monitoring continued. No airborne asbestos fibre
monitoring was undertaken during this reporting month as no asbestos abatement
works were carried out. Furthermore, dioxin
removal works commenced, during which dioxin impact monitoring was carried out.
No dioxin abatement works were conducted in the reporting month.
One successful prosecution was made against the project in the reporting month. The Contractor pleaded guilty to the alleged breach of the Waste Disposal (Charges for Disposal of Construction Waste) Regulation due to late application of the required billing account under the regulation, and had paid a fine of $3,000.
No environmental complaints or notifications of summons were 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 5, 13, 17 and 26 November 2008.
No non-compliance with regard to environmental legislation was recorded in this reporting month.
Repairing of
the documented cracked/damaged existing concrete ground slab was conducted and
completed in January 2008 following the site inspection by EPD on 17 December
2007. A set of photo records of the completed repair works has been presented
in Appendix G of EM&A report for February 2008.
Future key activities envisaged in the coming month include: -
· Preparation of demolition works;
· Demolition works;
· Dioxin off-site disposal; and
· Disposal of C&D material.
A tentative program for works activities is given in Appendix J.
1.1.1 This Project – “Demolition of Buildings and Structures in the Proposed Kennedy Town Comprehensive Development Area Site” is a Designated Project defined under the EIA Ordinance. An Environmental Permit (“EP”) was issued on 22 May 2002 [Permit No. EP-136/2002] and was subsequently varied. The latest EP [Permit No. EP-136/2002/B] in force was granted on 18 October 2007.
1.1.2 This Contract [No.: CV/2007/05] for Phase 1 Part 1 of the Project was awarded to the Contractor - Hang Kee Construction & Engineering Co. Ltd. and contractually commenced on 28 September 2007. The main Contract will last for 18 months. In accordance with Condition 1.12 of the Environmental Permit EP-136/2002/B, the Director of Environmental Protection (“DEP”) was notified that the commencement date of Phase 1 Part 1 of the Project was 12 October 2007 within the context of the Environmental Permit.
1.1.3 The scope of Phase 1 Part 1 of the Project includes demolition and clearance of all existing chimneys, buildings and ancillary structures above the existing concrete ground slab where the former Kennedy Town Incinerator Plant (“KTIP”) and the Kennedy Town Abattoir (“KTA”) are located, and the demolition and clearance of existing piers at the waterfront adjacent to the KTIP and KTA. It also includes the removal of asbestos containing materials (“ACM”) and dioxin/ furan contaminated materials (“DCM”) prior to demolition of structures and final capping of the underground facilities with clean soil and concrete cover of not less than 130mm thick as required in EP Condition 2.5(e).
1.1.4 A layout plan of the Project site and locations for nearby sensitive receivers is given in Figure 1.1.
1.1.5 Mott MacDonald Hong Kong Limited (“MMHK”; formerly Mott Connell Limited) has been commissioned by the Project Proponent – Civil Engineering and Development Department (“CEDD”) as the Environmental Team (“ET”) to undertake the Environmental Monitoring and Audit (EM&A) programme described in the approved EM&A Manual and the subsequent Updated EM&A Manual for Phase 1 Part 1 of the Project.
1.2 Coverage of this EM&A Report
1.2.1 The EM&A programme for this Project commenced on 28 September 2007. This report presents a summary of the environmental monitoring and audit results, list of activities, and mitigation measures implemented during the reporting month of November 2008.
1.2.2 This is the 14th Monthly EM&A Report for works carried out on-site during the reporting month.
1.3 Project Management Organisation
1.3.1 The project organisation chart is presented in Figure 1.2.
1.4.1 This Contract for Phase 1 Part 1 of the Project contractually commenced on 28 September 2007. The main Contract will last for 18 months.
1.5 Works Undertaken during the Reporting Month
1.5.1 The following construction activities have taken place during the reporting month: -
·
Demolition works at the Lairage
Block, Lairage Entrance Unit,
· Disposal of DCM to SENT Landfill Site; and
· Disposal of inert C&D materials to Tailor Recycled Aggregates Limited.
1.5.2 During the reporting month, no removal works for asbestos containing materials (“ACM”) or dioxin/ furan contaminated materials (“DCM”) were conducted. Removal works for ACM and DCM within the KTA and KTIP were completed on 31 July 2008 and 29 September 2008 respectively.
Figure 1.1 Layout Plan of Work Site and Neighbouring Sensitive Receivers
Figure 1.2 Project Organisation Chart
2.1 Summary of EM&A Requirements
2.1.1 The EM&A programme requires environmental monitoring for air quality, noise, water quality and waste management as specified in the Updated EM&A Manual dated December 2007.
2.1.2 1-hour TSP and 24-hour TSP levels at 2 dust monitoring stations and airborne asbestos fibre at 3 fibre monitoring stations are to be monitored during the course of dusty and asbestos abatement work in every reporting month. These air quality monitoring stations for 24-hour TSP and 1-hour TSP measurements and airborne fibre are shown in Figure 2.1 and Figure 2.2.
2.1.3 Noise levels at 3 monitoring stations are to be monitored during the course of noisy work in every reporting month. These noise monitoring stations are shown in Figure 2.3. A summary of impact EM&A requirements is presented in Table 2‑1 below.
Table 2‑1 Summary
of Impact EM&A Requirements
Descriptions |
Locations |
Frequencies |
Duration |
|
Air Quality |
24-Hour TSP |
2 Locations
– A1 & A2a |
Once every
6 days |
During dust
generating construction works |
1-Hour TSP |
2 Locations
– A1 & A2a |
3 times
every 6 days |
During dust
generating construction works |
|
Airborne Fibre |
3 Locations – AF1, AF2
and AF3 |
Daily |
During
asbestos abatement works |
|
Noise |
Leq (30 min), L10,
L90 |
3 Locations – N1,
N2 & N3 |
Once per
week |
During
Construction |
Waste |
On-Site Waste Audit |
Active work site locations |
Weekly |
During
Construction |
Wastewater |
On-Site audit of surface runoff and trade effluent disposal |
Active work site locations and final discharge point |
Weekly |
During
Construction |
General
Site Conditions |
Environmental Site Inspection |
Works areas and areas affected by works |
Weekly |
During
Construction |
2.2 Environmental Quality Performance Limits
2.2.1 Environmental Quality Performance Limits for air quality (dust and airborne fibre) and noise are shown in Appendix A.
2.3.1 The Event/ Action Plans for air quality and noise are shown in Appendix B.
2.4 Implementation of Environmental Mitigation Measures
2.4.1 The Contractor is required to implement mitigation measures listed in the latest EP, EIA Report and Updated EM&A Manual. During routine site inspections, the Contractor's implementation of mitigation measures is 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 Dust Monitoring Stations
Figure 2.2 Location of Airborne Asbestos Fibre Monitoring Stations
Figure 2.3 Location of Noise Monitoring Stations
3.1 Impact Monitoring Schedule
3.1.1 Regular site inspections were carried out on 5, 13, 17 and 26 November 2008 in this reporting month to assess the compliance with environmental requirements. The EM&A schedule is given in Appendix D.
3.1.2 During this reporting month, demolition works and removal of inert C&D material took place, and air quality and noise monitoring continued. In addition, disposal of DCM commenced and during the course of these activities dioxin monitoring was carried out.
24-hour TSP Monitoring
Installation
3.2.1 The 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 that the obstacle protrudes above the HVS.
· A minimum of 2m 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.
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%.
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 HOKLAS accredited laboratory for analysis.
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.
· HVSs are to be calibrated at a bi-monthly intervals using GMW-25 Calibration Kit throughout all stages of the air quality monitoring.
1-hour TSP Monitoring
Field Monitoring
3.2.2 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
· 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.
Maintenance and Calibration
· The 1-hour TSP meter would be checked at 3-month intervals and calibrated at 1-year intervals throughout all stages of the air quality baseline monitoring.
Airborne Fibre Monitoring
3.2.3
All airborne sampling procedures and
specification shall comply with EH10 guidance note and MDHS 39/3 (HSE
3.2.4 Air measurement of a minimum of 480 L shall be taken after commencement of abatement work. Results must be below 0.01 fibre/ ml.
Field Monitoring
· The sampler was calibrated by way of a filter holder completed with 0.8 micron pore size membrane filter in series with a calibrated rotameter.
· The sampler was switched on with the screw adjusted until it reached a flow rate of 4 litre/min as shown on the calibrated rotameter within ±5%.
· The starting flow rate was recorded on worksheet.
· The height of the filter holder must be within 1-2 m above ground.
· The following steps were performed at the beginning of next hour’s sampling:
- Calibrate the sampler again after an hour to check if the flow rate is within ±10% of 4 litres/min. (Note: No adjustment should be made to the pump flow rate.)
- Discard the sample if the flow rate is outside ±10%.
· Sampling volume must be at least 480 litres.
· The sampler was calibrated on completion of the sampling period with the finish flow rate recorded on worksheet.
· The sample should be discarded if the flow rate is outside ±10%.
· Use test ware or clean plastic cover to cover the cowl entrance.
· Use egg-crate box to carry the filter holder back to the laboratory, the filter head should face upward.
Analysis
· Membrane filter samples were analysed using method based on MDHS 39/3, “Asbestos fibres in air”.
Maintenance and Calibration
· Float and float tube cleaned in ultrasonic bath with DI water for 10 minutes.
Noise Monitoring
Field Monitoring
· The Sound Level Meter is to be set on a tripod at a height of 1.2 m above the ground.
· Facade measurements are to be made at all 3 monitoring locations.
· The battery condition is to be checked to ensure the correct functioning of the meter.
· Parameters such as frequency weighting, the time weighting and the measurement time are to be set as follows:
- Frequency weighting: A
- Time weighting: Fast
- Time measurement:
§ 1 no. of Leq (30 min) noise measurements between 07:00 & 19:00 hours on normal weekdays at each monitoring station on a per week basis;
§ 3 nos. of consecutive Leq (5 min) noise measurements between 07:00 & 19:00 hours on general holidays or Sundays at each monitoring station on a per week basis (if work is undertaken on these days).
· Prior to and after each noise measurement, the meter is to be calibrated using a Calibrator for 94 dB at 1000 Hz. If the difference in the calibration level before and after measurement is more than 1.0 dB, the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.
· During the monitoring period, the Leq, L10 and L90 would be recorded. In addition, site conditions and noise sources are to be recorded on a standard record sheet.
· Noise measurement should be paused during periods of high intrusive noise (e.g. dog barking, helicopter noise) if possible. Observations should be recorded when intrusive noise is unavoidable.
· Noise monitoring is to be cancelled in the presence of fog, rain, wind with a steady speed exceeding 5 m/s, or wind with gusts exceeding 10 m/s.
Maintenance and Calibration
· The microphone head of the sound level meter and calibrator is to be cleaned with soft cloth at quarterly intervals.
· The meter and calibrator are sent to the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.
Air Quality (Dust)
3.3.1 The equipment used for air quality (dust) monitoring is listed in Table 3‑1.
Table 3‑1 TSP
Monitoring Equipment
Equipment |
Model |
HVS Sampler |
GMWS 2310 Accu-vol
system |
Calibrator |
GMW 25 |
1-hour TSP Dust Meter |
8520 Dust Track Aerosol Monitor |
Air Quality (Airborne Fibre)
3.3.2 The equipment used for airborne fibre impact monitoring is listed in Table 3‑2.
Table 3‑2 Airborne Fibre Monitoring
Equipment
Equipment |
Model |
Sampler Pump |
Casella AFC
123, SKC 224-43XR & 224-44XR, and Casella vortex |
Rotameter
(Portable Flowmeter) |
KDG Type 1100 |
Calibrator |
SKC Electronic Calibrator Model 712 |
Noise
3.3.3 The equipment used for noise monitoring is listed in Table 3‑3.
Table 3‑3 Noise Monitoring
Equipment
Equipment |
Model |
Integrating Sound Level Meter |
Rion NL-31 |
Calibrator |
Rion NC-73 |
3.4.1 The calibration frequencies of the monitoring equipment are provided in Table 3‑4.
Table 3‑4 Equipment Calibration Frequencies
Equipment |
Calibration Frequency |
Last Calibration Date |
High Volume Sampler GMWS
2310 Accu-vol system |
Every two months |
21 Oct 2008 |
1-hour
TSP Dust Meter 8520
Dust Track Aerosol Monitor |
Every year |
4 Mar 2008 |
Integrated SLM Rion NL-31 |
Every year |
14 Apr 2008 |
Sound level calibrator Rion NC-73 |
Every year |
25 Jun 2008 |
3.4.2 The calibration certificates are included in Appendix I.
3.5 Results of Impact Monitoring
Air Quality (1-hr TSP)
3.5.1 Results of 1-hour TSP level are summarised in Table 3‑5. Detailed results, including weather conditions, and graphical presentations are included in Appendix E.
Table 3‑5 Results of 1-Hour TSP Impact Monitoring
Monitoring
Station |
1-hour
|
Action
Level (µg/m3) |
Limit
Level (µg/m3) |
A1 |
68 – 189 |
369 |
500 |
A2a |
86 – 182 |
357 |
500 |
Note: All figures are rounded off to the nearest whole
number.
3.5.2 No exceedance of Action / Limit Levels for 1-hr TSP was recorded in the reporting month.
Air Quality (24-hr TSP)
3.5.3 Results of 24-hour TSP level are summarised in Table 3‑6. Detailed results, including weather conditions, and graphical presentations are included in Appendix E.
Table 3‑6 Results of 24-Hour TSP Impact Monitoring
Monitoring
Station |
24-hour
|
Action
Level (µg/m3) |
Limit
Level (µg/m3) |
A1 |
91 – 131 |
180 |
260 |
A2a |
106 – 137 |
178 |
260 |
Note: All figures are rounded off to the nearest whole
number.
3.5.4 No exceedance of Action / Limit Levels for 24-hr TSP was recorded in the reporting month.
Airborne Fibre
3.5.5 No airborne asbestos fibre monitoring was undertaken during this reporting month as asbestos abatement works were completed by 31 July 2008. Details of the calculation results for airborne fibre monitoring in will be presented in Appendix F once available from laboratory.
Noise
3.5.6 Results of measured noise level, in terms of Leq (30min), during construction are summarised in Table 3‑7. Detailed results, including weather conditions, and graphical presentations are presented in Appendix G.
Table 3‑7 Result of Noise Monitoring
Monitoring
Station |
Measured Leq (30 min) Range, dB(A) |
Limit
Level for Leq (30min), dB(A) (0700 – 1900 hours on normal weekdays) |
N1 |
68 – 71 |
75 |
N2 |
67 – 72 |
75 |
N3 |
70 – 74 |
75 |
Note: All figures are rounded off to the nearest whole
number.
3.5.7 No exceedance of Action / Limit Levels for construction noise was recorded.
Waste Management
Table 3‑8 Monthly
Summary Waste Flow Table for 2008
Month |
Actual Quantities of Inert C&D
Materials Generated Monthly |
Actual Quantities of C&D Wastes
Generated Monthly |
||||||||||||||||||
Total Quantity Generated |
Broken Concrete |
Reused in the Contract |
Reused in other Projects |
Disposed of at Public Fill |
Metals |
Paper/ Cardboard |
Plastics |
Chemical waste |
Others (e.g. refuse) |
|||||||||||
(In ‘000 tons) |
(In ‘000 tons) |
(In ’000 tons) |
(In ‘000 tons) |
(In ‘000 tons) |
(In ‘000 kg) |
(In ‘000 kg) |
(In ‘000 kg) |
(In ‘000 kg) |
(In tons) |
|||||||||||
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
Est. |
Act. |
|
Jan |
0.25 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.25 |
0 |
1 |
0 |
0.1 |
0 |
0.1 |
0 |
0.1 |
0 |
0.25 |
0.012 |
Feb |
0.25 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.25 |
0 |
1 |
0 |
0.1 |
0 |
0.1 |
0 |
1 |
0 |
0.25 |
0 |
Mar |
0.25 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0.25 |
0 |
1 |
0 |
0.1 |
0 |
0.1 |
0 |
10 |
* |
0.25 |
0 |
Apr |
3.75 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3.75 |
0 |
50 |
73.03 |
0.1 |
0 |
0.1 |
0 |
20 |
* |
0.25 |
0.125 |
May |
3.75 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3.75 |
0 |
50 |
92.24 |
0.1 |
0 |
0.1 |
0 |
20 |
0 |
0.25 |
0.125 |
June |
3.75 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
3.75 |
0 |
50 |
447.12 |
0.1 |
0 |
0.1 |
0 |
25 |
* ^ |
0.25 |
0.100 |
Sub-total |
12 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
12 |
0 |
153 |
612.39 |
0.6 |
0 |
0.6 |
0 |
76.1 |
- |
1.5 |
0.362 |
Jul |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
0 |
90 |
470.34 |
0.1 |
0 |
0.1 |
0 |
25 |
9.2 * ^ |
0.25 |
0.150 |
Aug |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
0 |
90 |
340.45 |
0.1 |
0 |
0.1 |
0 |
25 |
17.0 * ^ |
0.25 |
0.225 |
Sep |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
5 |
0 |
90 |
143.72 |
0.1 |
0 |
0.1 |
0 |
15 |
15.3 * ^ |
0.25 |
0.100 |
Oct |
5 |
5.91 |
0 |
0 |
0 |
0 |
0 |
5.34 |
5 |
0.57 |
90 |
333.69 |
0.1 |
0 |
0.1 |
0 |
15 |
7.3 * ^ |
0.25 |
0.112 |
Nov |
5 |
5.07 |
0 |
0 |
0 |
0 |
0 |
5.07 |
5 |
0 |
90 |
350.00 |
0.1 |
0 |
0.1 |
0 |
15 |
140.75 * ^ |
0.25 |
0.138 |
Dec |
5 |
|
0 |
|
0 |
|
0 |
|
5 |
|
90 |
|
0.1 |
|
0.1 |
|
0.1 |
|
0.25 |
|
Total |
42 |
|
0 |
|
0 |
|
0 |
|
42 |
|
693 |
|
1.2 |
|
1.2 |
|
171.2 |
|
3 |
|
* Up to 30 November
2008: Total ACM generated as chemical waste = 191.68 m3. Total
ACM disposed (to SENT landfill) = 191.68 m3. All ACM generated was stored
on-site prior to disposal.
^ Up to 30 November 2008: Total DCM generated as chemical waste: 296.00 m3. Total DCM disposed = 81.40 m3. All DCM generated is stored on-site prior to disposal.
4.1.1 One environmental meeting was held on the day of the monthly site inspection on 17 November 2008.
4.2 Status of Environmental Submissions, Permits and Licenses
4.2.1 A summary of status of all environmental submissions, permits, licenses, and/or notifications to EPD for this Project during the reporting period is presented in Table 4‑1 below.
Table 4‑1 Status of Environmental Submissions, Permits and Licenses
Item |
Description |
Date of Application/ Submission |
Status |
1. |
Environmental Permit (EP No.
EP-136/2002/B) |
27 Sep 2007 |
Valid |
2. |
Billing
Account under Waste Disposal (charges for Disposal of Construction Waste)
Regulation (a/c no.: 7006217) |
Approved on 31 Oct 2007 |
Valid |
3. |
Waste
Management Plan |
v 1.1 on 9 Nov 2007 v 2.0 on 4 Dec 2007 v 3.0 on 17 Jan 2008 v 3.1 on 5 Feb 2008 v 3.2 on 28 Feb 2008 v 4.0 on 8 May 2008 v 4.1 on 12 Jun 2008 (including addendum &
amendment pages submitted on 26 Jun 2008) |
WMP v 4.1 (incorporating addendum & amendment
pages) approved by EPD on 10 July 2008 (includes ACM removal involving Chimney A & B) |
4. |
Registration
as a Chemical Waste Producer under Waste Disposal (Chemical Waste) (General)
Regulation (ref. no.: WPN5213-111-H2999-02) |
23 Oct 2007 Approved on 6 Nov 2007 |
Valid |
5. |
Effluent
Discharge Licence under Water Pollution Control Ordinance (licence no.:
EP880/W10/XX0297) |
27 Oct 2007 Approved by EPD on 2 June 2008 |
Valid until 31 May 2010 |
6. |
Supplementary
Asbestos Investigation Report (AIR) and Asbestos Abatement Plan (AAP) for KTA |
30 Jan 2008 Approved by EPD on 26 Feb 2008 |
Valid |
7. |
Supplementary
AIR and AAP for KTIP |
14 Mar 2008 Approved by EPD on 19 May 2008 |
Valid |
8. |
Report
on Toxicity Characteristic Leachate Procedure
(TCLP) Test Results for Pilot Cement Mixing of DCM |
v 1.3 on 21 Aug 2008 (including amendment pages on 11
Sep 2008) Approved by EPD on 23 Sep 2008 |
Valid |
New submissions |
|||
|
No
new submissions |
|
|
4.3.1 Inert C&D materials and non-inert C&D wastes were generated by the Project in the reporting month are as shown Table 3‑8. A trip ticket system has been implemented for all off-site waste disposals.
4.3.2 All asbestos removal works were completed on 31 July 2008 and all ACM generated has been disposed of. During the reporting month, no further ACM generation or disposal took place.
4.3.3 In addition, dioxin abatement works were completed on 29 September 2008. During the reporting month, no further DCM was generated while 79.00 m3 of DCM were disposed at SENT Landfill.
4.3.4 All ACM and DCM generated are stored on-site prior to disposal.
4.4 Review of Environmental Monitoring Procedures
4.4.1 The monitoring works conducted by the Environmental Team have been reviewed. No changes in the environmental monitoring procedures are considered necessary at this stage.
4.5 Implementation Status of Environmental Mitigation Measures
4.5.1 An Implementation Schedule of Mitigation Measures from the EIA/ Updated EM&A Manual has been given in Appendix C.
5.1.1 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 Contractor, ET and IEC on 17 November 2008 and weekly site inspections were carried out by the Contractor and ET on 5, 13 and 26 November 2008.
5.1.2 Major findings provided by ET and those jointly provided by the ET and IEC on 17 November 2008 from the site inspections are summarised in Table 5‑1 below.
Table 5‑1 Summary of Environmental Site Inspections
Date of Inspection |
Major Observations |
Action(s) |
5 Sep 2008 (original observation) |
Outlet compartment in sedimentation tank was empty.
As a result, there is a risk that water discharge samples cannot be obtained
to fulfil licence conditions. |
Outlet compartment in the sedimentation tank
remained empty. (5, 13, 17 & 26 Nov 2008, 3 Dec 2008) |
5 Nov 2008 |
Part of the tarpaulin enclosure for DCM waste in the
ash/rubble area was missing. The Contractor was reminded to provide adequate
measures to comply with the relevant codes of practice as soon as possible. |
Tarpaulin sheeting was provided to re-enclose DCM
waste storage area. However, it has since been damaged again. The Contractor
was reminded to rectify the matter as soon as possible. (13 Nov 2008) |
Tarpaulin sheeting which was provided to re-enclose
DCM waste storage area was damaged and has not been repaired / replaced yet.
The Contractor was reminded to rectify the matter as soon as possible. (17
Nov 2008) |
||
All DCM waste in the DCM waste storage area near
Chimney B has been disposed at SENT Landfill. (26 Nov 2008) |
||
13 Nov 2008 |
No new observations. |
- |
17 Nov 2008 |
The original ACM waste store room currently used for
storing DCM waste containers should have a correct label (DCM waste) at the
entrance. |
A new label for DCM waste was provided at the
entrance of the original ACM store room currently used for storing DCM waste
containers. (26 Nov 2008) |
A used bottle containing chemicals was found near
the site entrance. The bottle should be handled properly and stored if it is
found to be a chemical waste. |
The used bottle containing chemicals was removed
from near the site entrance and retained for relevant site activities (such
as plant maintenance). (26 Nov 2008) |
|
26 Nov 2008 |
A small water pond formed from site run-off was
observed near the refuse pier. The Contractor was reminded to ensure
effective implementation of all site run-off control measures. |
Water pond observed was cleared. (3 Dec 2008) |
5.1.3 There were no non-compliances regarding site environmental audits in this reporting month.
5.2 Condition of Identified Surface Cracks
5.2.1 In accordance with EP Conditions 2.5 (e), inspection findings and repair works carried out should be reported in the monthly EM&A Report.
5.2.2 Repair works for the identified surface cracks was completed in January 2008, and the Contractor’s photo records of the repaired cracks for documentation are presented in Appendix G of the EM&A report for February 2008. This documentation shall become the baseline condition to be compared against in each subsequent site inspection for any deterioration, which is to be reported in every coming monthly EM&A Report.
5.2.3 During weekly site inspections in the reporting month, no deterioration in the condition of the repaired surface cracks was observed.
5.3
Site
Effluent Discharge/WPCO Effluent Discharge
5.3.1 An application was made to EPD on 27 October 2007 regarding WPCO discharge licence and was approved by EPD on 2 June 2008. The drainage plan which was included in the application is shown in Figure 5.1.
5.3.2 First sampling was conducted in July 2008 at the discharge outlet of the sedimentation tank at Kennedy Town Abattoir and analysed. The Contractor has set out the procedures to ensure proper sampling of site effluent. Effluent sampling status will be updated in the following EM&A reports.
6.1 Summary of Environmental Complaints, Notifications of Summons and Successful Prosecutions
6.1.1 No environmental complaint, notification of summons and prosecution has been received or made against the Project in this reporting month. Table 6‑1 below presents a statistic 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 |
|||
Nov
2008 |
Cumulative |
Nov
2008 |
Cumulative |
Nov
2008 |
Cumulative |
0 |
0 |
0 |
1 |
1 |
1 |
6.1.2 Regarding the summons served on the Contractor by EPD in May 2008 concerning an alleged breach of the Waste Disposal (Charges for Disposal of Construction Waste) Regulation due to late application of the required billing account under the regulation, the Contractor had pleaded guilty to the alleged offence and had paid a fine of $3,000.
6.1.3 Appendix B presents the environmental complaint event contingency plan of the Project.
6.2.1 No environmental enquiries were received during the reporting month.
6.3.1 No unusual events were recorded during the reporting month.
6.4 Environmental Exceedance/ Non-compliance
6.4.1 The Event and Action Plans for air quality and noise are presented in Appendix B.
Air Quality - Dust
6.4.2 No exceedance of the Action and Limit Levels for 1-hour and 24-hour TSP was recorded.
Air Quality – Airborne Fibre
6.4.3 No airborne fibre monitoring was carried out as ACM abatement works have been completed.
Noise Impact
6.4.4 No exceedance of the Action and Limit Levels for construction noise was recorded.
Wastewater
6.4.5 No discharge of trade effluent was observed during site inspections. Contractor provided modifications to the existing draining system to control surface runoff during demolition and abatement works to satisfy the requirements of WPCO. This is shown in Figure 5.1 and included in the Contractor’s application for an Effluent Discharge Licence under WPCO which was approved by EPD on 2 June 2008 and received by ER on 3 July 2008.
6.4.6 First sampling was conducted in July 2008 at the discharge outlet of the sedimentation tank at Kennedy Town Abattoir and analysed. The Contractor has set out the procedures to ensure proper sampling of site effluent. Effluent sampling status will be updated in the following EM&A reports.
Waste Management
6.4.7 Not applicable.
Summary of Exceedances
6.4.8 Table 6‑2 summarises the total number of exceedances for air quality, airborne fibre and noise monitoring recorded during 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 |
40 |
0 |
0% |
0 |
0% |
Airborne Fibre |
0 |
0 |
0% |
0 |
0% |
Noise |
12 |
N/A |
N/A |
0 |
0% |
Note: 'N/A' – Not applicable. Action Level for
noise relates to the number of documented complaints received
6.4.9 No exceedance was recorded in the reporting period.
7.1 Key Issues and Recommendations for Coming Month
7.1.1 Key activities to be considered in the coming month include: -
· Preparation of demolition works;
· Demolition works;
· Dioxin off-site disposal; and
· Disposal of C&D material.
7.1.2 Based on the above key issues, the recommended mitigation measures to be implemented include the following: -
Air
· Covers for dusty stockpiles and control of dust emissions from construction (demolition) works;
· Wetting of dusty stockpiles by sprinklers;
· Haul road watering and vehicle wheel wash prior to exit; and
· All plant to be maintained to prevent any undue air emissions.
Noise
· All plant shall be maintained to prevent any undue noise nuisance.
Water
· All wheel wash water shall be diverted to a sediment pit;
· All clean surface water shall be diverted around the site; and
· 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.
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 disposal (with locations) shall be kept.
DCM
· Removal, handling, transportation and disposal of the wastes in line with relevant regulations.
8.1.1 EM&A was performed in November 2008. All monitoring and audit results in the reporting month were checked and reviewed.
8.1.2 Dust and noise monitoring were conducted during the reporting month due to continuation of demolition works and scaffolding erection works. No exceedances of the Action and Limit Levels for dust and construction noise were recorded.
8.1.3 Also, during the reporting month no airborne asbestos fibre monitoring was undertaken since no asbestos abatement activities were conducted.
8.1.4 Furthermore, dioxin abatement works were completed on 29 September 2008 and removal of DCM had commenced. Dioxin impact monitoring was conducted during these activities.
8.1.5 During the reporting month, no deterioration was observed in the repaired cracks on the existing concrete ground slab, and therefore no further repair works were required.
8.1.6 One successful prosecution was made against this Project during the reporting month. The Contractor pleaded guilty to the alleged breach of the Waste Disposal (Charges for Disposal of Construction Waste) Regulation due to late application of the required billing account under the regulation, and had paid a fine of $3,000.
8.1.7 No environmental complaints or notification of summons have been received or made against this Project in this reporting month.
8.2.1 No further recommendations made at this stage pending more site progress achieved.
Action and Limit
Levels for 24-hour TSP
Monitoring Station |
Action Level (mg/m3) |
Limit Level (mg/m3) |
A1 |
180 |
260 |
A2a |
178 |
260 |
Note: All figures are rounded off to the nearest whole
number.
Action and Limit
Levels for 1-hour TSP
Monitoring Station |
Action Level (mg/m3) |
Limit Level (mg/m3) |
A1 |
369 |
500 |
A2a |
357 |
500 |
Note: All figures are rounded off to the nearest whole
number.
Action and Limit
Levels for Airborne Fibre
Monitoring Station |
Action Level (fibre/ml) |
Limit Level (fibre/ml) |
AF1 |
|
|
AF2 |
0.006 |
0.01 |
AF3 |
|
|
Action and Limit
Levels (Leq) for Construction Noise
Time
Period |
Action Level |
Limit Level (dB(A)), Leq (30min) |
||
N1 |
N2 |
N3 |
||
0700 – 1900 hours on normal weekdays |
When one documented complaint is received from any one of the sensitive receivers |
75 |
75 |
75 |
0700 – 2300 hours on public holidays including Sundays and 1900 – 2300 hours on all days |
Subject to requirements stipulated in future Construction Noise Permits |
|||
2300 – 0700 on all days |
Appendix B Event and
Action Plans
Table B‑1 Event/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 |
||||
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. Supervisor 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 |
Table B‑2 Event/Action Plan for Noise Impact
EVENT |
ACTION |
|||
ET |
IEC |
ER |
CONTRACTOR |
|
Action
Level is reached |
1.
Inform IEC and ER 2.
Carry out investigation 3.
Report the results of the investigation to the IEC
and Contractor 4.
Discuss with the Contractor and formulate remedial
measures |
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 failure in writing 2.
Notify Contractor 3.
Require Contractor to propose remedial measures for
the analyzed noise problem 4.
Ensure remedial measures are properly implemented |
1.
Submit noise mitigation proposal to IEC 2.
Implement noise mitigation proposals |
Limit
Level is reached |
1.
Inform IEC, ER, EPD and Contractor 2.
Identify source 3.
Repeat measurement to confirm findings 4.
Carry out analysis of Contractor's working procedures
to determine possible mitigation to be implemented 5.
Inform IEC, ER and EPD the causes & actions taken
for the exceedances 6.
Assess effectiveness of Contractor's remedial actions
and keep IEC, EPD and ER informed of the results 7.
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 failure in writing 2.
Notify Contractor 3.
Require Contractor to propose remedial measures for
the analyzed noise problem 4.
Ensure remedial measures are properly implemented 5.
If exceedance continues,
consider what portion of the work is responsible and instruct the Contractor
to stop that portion or work 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.
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
Table C‑3 Implementation Schedule of Recommended
Mitigation Measures
No. |
Activity |
Mitigation/ EIA
Recommendations |
Responsibility for
Implementation |
Location Duration completion of measures |
Implementation Stage |
Relevant Guidelines
Legislation |
Implementation Status ^ |
1 |
Ash Disposal |
|
|
|
|
|
|
I |
Treatment |
The ash deposits are mainly contaminated by dioxins
and furans and mixed with asbestos containing materials. 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 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. As an additional measure, release of contaminants
from disturbed ash should be minimised prior to gathering up the ash
materials and amended water containing a wetting agent should be sprayed on
the ash. The wetting agent will assist
in water penetration to thoroughly soak the ash and ensure dust levels are
reduced without using excessive water. The use of amended water for dust
suppression will minimise the use of excessive water that would result in
surface runoff in the removal process.
Dust suppression can be carried out in a controlled manner and no
insurmountable environmental problem would result. |
CEDD’s Contractor |
KTCDA work areas. Duration of the ash
removal |
A@ |
1, 10, EIA |
X |
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 |
ü |
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 |
ü |
2 |
Demolition |
|
|
|
|
|
|
A |
Non-blasting
Methodology |
Waste
Management Plan to be submitted to EPD.
Demolition by Non-Blasting Methodology Only. All structures and buildings should be
demolished and removed prior to demolition of chimneys |
CEDD |
KTCDA work areas. Duration of the
demolition |
C# |
8 |
ü |
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 |
As above |
C |
4 |
ü |
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 |
ü |
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 |
ü |
E |
Improved
Site Hoarding |
Boundary hoarding to be
modified in form of noise barrier to provide effective noise screening and
made of panels with a superficial surface density of at least 10 kg/m3 |
CEDD’s Contractor |
As above |
C |
Env. Permit |
ü |
F |
Demolition
Sequence |
Include
careful consideration and positioning of portable noise barriers to allow
noise attenuation. |
CEDD’s Contractor |
As above |
C |
8 |
N/A |
G |
Portable
Noise Barriers |
Moveable noise barriers
shall be provided close to PME in cases where, in the opinion of the
Engineer, such PME has the potential to cause noise nuisance to sensitive
receivers and where a benefit will result.
Such barriers shall be made of panels with superficial surface density
not less than 10 kg/m3. |
CEDD’s Contractor |
As above |
C |
Env. Permit |
N/A |
H |
Plant
Operation |
Modify
continuous operational periods for noisy plant to comply with noise criteria.
|
CEDD’s Contractor |
As above |
C |
Env Permit |
ü |
I |
Demolition
Techniques |
Selection
of non-blasting demolition techniques to minimise noise and vibration. |
CEDD’s Contractor |
As above |
C |
8 |
ü |
J |
Plant
maintenance |
All
plant shall be maintained to prevent any undue noise nuisance. |
CEDD’s Contractor |
As above |
C |
2, 3 |
ü |
K |
Wheel
wash |
All
wheel wash water shall be diverted to a sediment pit. |
CEDD’s Contractor |
As above |
C |
5 |
ü |
L |
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 |
ü |
M |
Surface
water diversion |
All
clean surface water shall be diverted around the site. |
CEDD’s Contractor |
As above |
C |
5, 12 |
X |
N |
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 |
ü |
O |
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 |
ü |
P |
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 |
ü |
Q |
Material
containers |
All
empty bags and containers shall be collected for disposal. |
CEDD’s Contractor |
As above |
C |
6,7 |
ü |
R |
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 |
ü |
S |
Neighbourhood
nuisance |
All
complaints regarding construction works shall be relayed to the environmental
team. |
CEDD’s Contractor |
As above |
C |
1, 6 |
ü |
T |
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 |
ü |
U |
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 |
ü |
V |
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 |
ü |
W |
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 |
ü |
X |
Trip-ticket
system |
To monitor
the disposal of waste at landfills and control fly-tipping, a “trip-ticket”
system under WBTC N0.5/99 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 |
ü |
|
|
|
|
|
|
|
|
4 |
Monitoring and Audit |
To be
carried out in accordance with the Implementation Schedule in Table AC-2. |
CEDD*/
Contractor/ RSS |
KTCDA works areas During demolition |
C |
1 |
ü |
* Normally
undertaken by a specialist monitoring team employed directly by the proponent
and audited by the IEC
@ A =
during ash removal (before demolition)
# C
= during construction (i.e. demolition phase).
^ Implementation
Status:
ü implemented
Ï not
implemented
P partially
implemented
X rectified
by Contractor
Relevant Guidelines
Legislation references:
1.
Environmental Impact Assessment Ordinance Technical Memorandum (EIAO)
2.
Noise Control Ordinance
3.
The ProPECC Note PN2/93 (Construction Noise
daytime limits)
4.
Air Pollution Control Ordinance (APCO)
5.
Water Pollution Control Ordinance (WPCO)(Cap. 358)
6.
Waste Disposal Ordinance (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 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 1/94Construction Site Drainage
Table
C-4 Implementation Schedule of
Recommended Mitigation Measures
EIA Ref. |
EM&A Ref. |
Environmental Protection Measures / Mitigation
Measures |
Location / Timing |
Implementation Agent |
Implementation Stage |
Relevant Legislation and Guidelines |
Implementation Status ^ |
||
|
|
|
|
|
D |
C |
O |
|
|
Air
Quality |
|
|
|
|
|
|
|
|
|
6.3.2 |
|
Adoption of good site practices and avoid practices likely to raise dust level |
KTCDA Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
6.3.2 |
|
Frequent
cleaning and damping down of stockpiles and dusty areas of the Site. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
6.3.2 |
|
Reducing
drop height during material handling or wall felling. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
6.3.2 |
|
Imposing
a vehicle speed restriction of 15 km/hr within the Site and confine haulage and waste
collection vehicles to designated roadways inside the site. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
6.3.2 |
|
Provision
of wheel washes facilities for Site vehicles leaving the Site. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
6.3.2 |
|
Regular
plant maintenance to minimise exhaust emission. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
6.3.2 |
|
Sweep
up dust and debris at the end of each shift. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
|
2.9.1 |
Stockpiles of dusty waste materials greater than
20m3 shall be enclosed on three sides, with walls extending above
the pile and 2 metres beyond the front of the pile. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
|
2.9.1 |
Any vehicle with an open load carrying area used
for moving potentially dusty material shall have properly fitting side and
tail-boards. Materials having the
potential to create dust shall not be loaded to a level higher than the side
and tail boards and shall be covered by a clean tarpaulin in good condition. The tarpaulin shall be properly secured and
shall extend at least 300m over the edges of the side and tail-boards. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
|
2.9.1 |
Effective water sprays shall be used during the
collection and loading of dusty wastes and other similar materials, when dust
is likely to be created and to dampen all stored materials during dry and
windy weather. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
|
2.9.1 |
Areas within the KTCDA site where there is a
regular movement of vehicles, shall have an approved hard surface and be kept
clean of loose surface material. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
|
2.9.1 |
Conveyor belts shall be fitted with wind-boards,
and conveyor transfer points and hopper discharge areas shall be enclosed to
minimize dust emission. All conveyors
carrying materials which have the potential to create dust shall be totally
enclosed and fitted with belt cleaners. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
N/A |
|
2.9.1 |
Adequate dust suppression plant including water
bowers with spray bars shall be provided. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
APCO (Cap. 311); Air Pollution Control (Construction
Dust) Regulation; EIAO-TM |
ü |
Noise |
|
|
|
|
|
|
|
|
|
5.8.1
& 5.8.2 |
|
Movable
barriers as noise shields shall be considered for deployment close to noisy
equipment. Where required, these
should be made of panels with a superficial surface density of at least 7
kg/m2. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
NCO
(Cap. 400); EIAO-TM; PN 2/93 |
N/A |
5.8.2 |
3.8.3 |
Silenced
and super silenced type equipment. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
NCO
(Cap. 400); EIAO-TM; PN 2/93 |
ü |
5.8.2 |
|
Reduction
in number of plant operating simultaneously. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
NCO
(Cap. 400); EIAO-TM; PN 2/93 |
ü |
5.8.2 |
|
Use
of modified site hoarding to a perimeter noise barrier as a noise shield. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
NCO
(Cap. 400); EIAO-TM; PN 2/93 |
ü |
5.8.2 |
|
Re-scheduling
and restricting hours of operation of noisy tasks. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
NCO
(Cap. 400); EIAO-TM; PN 2/93 |
ü |
Water
Quality |
|
|
|
|
|
|
|
|
|
|
4.3.2 |
Use
of sediment traps, where appropriate. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.2 |
Adequate maintenance of drainage systems to
prevent flooding and overflow. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.3 |
Provision of temporary channels to facilitate
run-off discharge into the appropriate watercourses, via a silt retention
pond, and permanent drainage channels to incorporate sediment basins or traps
and baffles to enhance deposition rates. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
P |
|
4.3.4 |
Provision of temporary and permanent drainage
pipes and culverts to facilitate run-off discharge and shall be adequately
designed for the controlled release of storm flows. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.4 |
Regular cleaning and maintenance of all sediment
traps. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.4 |
When construction works has finished or the
temporary diversion is no longer required, temporarily diverted drainage
shall be reinstated to its original condition. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
N/A |
|
4.3.5 |
Installation of wheel washing facilities to
ensure no earth, mud and debris is deposited on roads. Sand and silt in the wash water from such
facilities shall be settled out and removed prior to discharge of the used
water into storm drains. A section of
the road between the wheel washing bay and the public road shall be paved
with backfill to prevent wash water or other site run-off from entering the
public road drains. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.6 |
Provision of oil interception facilities in
appropriate areas in the drainage system, where oil spills may occur, and
regularly emptied to prevent the release of oil and grease into the storm
water drainage system after accidental spillage. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.9 |
Debris
and rubbish on site should be collected, handled and disposed or properly to
prevent such material from entering the water column and causing water
quality impacts. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
PN 1/94, WPCO (Cap. 358) |
ü |
|
4.3.10 |
Fuel
storage areas should be provided with locks and be sited on sealed areas if
required, within bunds of a capacity equal to 110% of the storage capacity of
the largest container (to provide a safety margin) and control spilt fuel
oils. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
Waste Management – General |
|
|
|
|
|
|
|
||
7.11.2 |
5.2.33 |
The
Waste Management Plan shall be prepared in accordance with WBTC No. 29/2000
(superseded by ETWB TC(W) No. 15/2003) and shall provide details of the
measures and procedures considered necessary to control and manage the
storage, transportation and disposal of all wastes generated during the
demolition. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
ü |
ü |
|
ETWB TC(W) No. 15/2003 |
ü |
7.10.30 |
5.2.37 |
Wastes
should be handled and stored in a manner which ensures that they are held
securely without loss or leakage thereby minimising the potential for
pollution. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.30 |
5.2.37 |
Only
reputable waste collectors authorised to collect the specific category of
waste concerned should be employed. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.30 |
5.2.37 |
Appropriate
measures should be employed to minimise windblown litter and dust during
transportation by either covering trucks or transporting wastes in enclosed
containers. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.30 |
5.2.37 |
The
necessary waste disposal permits should be obtained from the appropriate
authorities, if they are required, in accordance with the Waste Disposal
Ordinance (Cap 354), Waste Disposal (Chemical Waste) (General) Regulation
(Cap 354) and Government Land Ordinance (Cap 28). |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Waste Disposal Ordinance (Cap 354), Waste Disposal
(Chemical Waste) (General) Regulation (Cap 354), |
ü |
7.10.30 |
5.2.37 |
Collection
of general refuse should be carried out frequently, preferably daily. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.30 |
5.2.37 |
Waste
should only be disposed of at licensed sites and site staff and the civil
engineering Contractor should develop procedures to ensure that illegal
disposal of wastes does not occur. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.30 |
5.2.37 |
Waste
storage areas should be well maintained and cleaned regularly. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.30 |
5.2.37 |
Records
should be maintained of the quantities of wastes generated, recycled and
disposed, determined by weighing each load. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
Waste Management - General Refuse |
|
|
|
|
|
|
|
||
7.10.20 |
5.2.27 |
Office
wastes can be reduced through the policies for re-use of paper in printers
and copiers for draft documents. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
policies of recycling e.g. paper and toners or cartridges if volumes are
large enough to warrant collection, should be
encouraged with participation in a local collection scheme if one is
available. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
In
order to reduce waste, the number of photocopies shall be reduced to a
minimum while internal documents and external documents shall be copied on
both sides of paper where appropriate.
Recycling bins for paper and toners will be provided in site office to
facilitate the recycling of paper. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.19 |
5.2.26 |
General
refuse is generated largely by food service activities on site, so reusable
rather than disposable dishware should be used if feasible. Aluminium 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. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Putrescible
wastes, such as lunch box, and domestic wastes generated on-site shall be
stored in enclosed bins or compaction units separate from C&D and
chemical wastes. Waste paper will be
stored in containers clearly marked as recyclable or waste. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Public Health and Municipal
Services Ordinance (Cap. 132) |
ü |
7.10.18 |
5.2.25 |
A
reputable waste collector should be employed by the Contractor to remove
general refuse, separately from C&D material and chemical wastes, preferably
daily to minimise odour, pest and litter impacts. The burning of refuse on construction sites
is prohibited by law. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Public Health and Municipal
Services Ordinance (Cap. 132), Air
Pollution Control (Open Burning) Regulation |
ü |
|
|
Waste
disposal records shall be obtained from the appropriate authorities and
collection of general refuse and general site housekeeping should be carried
out. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Waste Disposal Ordinance (Cap. 354); Waste
Disposal (Chemical Waste) (General) Regulation (Cap. 354); |
ü |
Waste Management - C&D Materials |
|
|
|
|
|
|
|
||
7.10.7 |
5.2.7 |
The
Contractor should recycle C&D material on-site as far as possible. Planning, careful design and good site
management of the demolition process can minimise over ordering and avoidable
waste. Areas within the Site areas can
be segregated for the separation and storage.
Proper segregation of wastes on Site will increase the feasibility of
utilising recycling contractors to recycle certain components of the waste
stream. Concrete and masonry can be
crushed and used as fill to level the Site after demolition. However there will be little or no
excavation of any underground structures therefore the majority of inert
waste will need to be delivered to public filling areas. Steel reinforcing bars can be re-used by
scrap steel mills. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
ü |
ü |
|
ETWB TC(PS) No. 25/99, 12/2000; ETWB
TC(W) No. 15/2003 |
ü |
|
|
“Selective
Demolition” involves demolition and removal of wastes of the same category
one at a time. In general, domestic
wastes such as furniture, household appliances; metal components such as
window frames, pipes; timber components such as doors, wooden floors; and
other wastes such as tiles, asphalt materials, ceramic products should be
removed first. The building demolition
shall begin after all the above non-structural materials have been stripped
and removed. To avoid mixing the
non-recyclable bricks with the broken concrete, the demolition sequence
should be planned in such a way that brick walls are demolished first and
stockpiled separately before the demolition of structural members. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
All
C&D materials arising from the demolition work shall be sorted on-site
and separated into different groups for off-site disposal at landfills,
public filling areas, in filling areas provided by the Contractor, or recycling
at the C&D waste recycling facilities as appropriate. All fill to be disposed of at public
filling areas have to be sorted and broken down to meet the requirements of
the Dumping Licence conditions. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
ETWB TC(PS) No. 12/2000 |
ü |
|
|
Designated
areas for segregation and temporary storage of reusable and recyclable
materials should be identified in the Waste Management Plan to be prepared by
the Contractor. The Contractor should
recycle as much of the C&D material as possible on site. Different areas of the work site should be
designated for such segregation and storage wherever site conditions permit. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
C&D
material should be removed from site as soon as practicable to avoid adverse
environmental impacts due to on-site storage of the material. It should be sorted/separated at the
construction site as far as practicable into two main types: inert (including
soil, rock, concrete, brick, aggregates and asphalt) and non-inert (wood,
paper, general garbage and other inorganic).
Recyclable C&D materials such as broken concrete and rock should
be further sorted out from the inert portion and be delivered to recycling facilities
as designated by the Engineer’s Representative for processing into recycled
aggregates for use in construction.
The non-recyclable inert portion can be used as public fill for
dumping in public filling areas whilst the non-inert portion is classified as
C&D waste which will require to be disposed of at the WENT Landfill Site
or other areas as designated by EPD. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
N/A |
|
|
The
Environment, Transport and Works Bureau Technical Circular (Works) No.
31/2004 – Trip Ticket System for Disposal of Construction & Demolition
Materials promulgates the amended trip ticket system (TTS) for public works
contracts including capital works contracts, where C&D materials
including waste generated on site require disposal. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
ETWB TC(W) No. 31/2004 |
ü |
Waste Management - Chemical Waste |
|
|
|
|
|
|
|
||
7.10.10 |
5.2.10 |
For
those processes that generate chemical waste, it may be possible to find
alternatives which generate reduced quantities or even no chemical waste, or
less dangerous types of chemical waste. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.11 |
5.2.11 |
Chemical
waste that is produced, as defined under Section 3 of the Waste Disposal
(Chemical Waste) (General) Regulation, should be handled in accordance with
the Code of Practice on the Packaging, Labelling and Storage of Chemical
Wastes. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Waste Disposal (Chemical Waste) (General) Regulation |
ü |
7.10.12 |
5.2.12 |
Containers
used for the storage of chemical wastes should: a) Be
suitable for the substance they are holding, resistant to corrosion,
maintained in a good condition, and securely closed; b)
Have a capacity of less than 450 l unless the specifications have been
approved by the EPD; and; c)
Display a label in English and Chinese in accordance with instructions
prescribed in Schedule 2 of the Regulations. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.13 |
5.2.13 |
The
storage area for chemical wastes should: a) Be
clearly labelled and used solely for the storage of chemical waste; b) Be
enclosed on at least 3 sides; c)
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; d)
Have adequate ventilation; e) Be
covered to prevent rainfall entering (water collected within the bund must be
tested and disposed as chemical waste if necessary); and f) Be
arranged so that incompatible materials are adequately separated. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
X |
7.10.14 |
5.2.14 |
Disposal
of chemical waste should: a) Be
via a licensed waste collector; and b) Be
to a facility licensed to receive chemical waste, such as CWTC, which also
offers a chemical waste collection service and can supply the necessary
storage containers; or c) Be
to a recycling or reprocessing facility licensed by EPD. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.16 |
5.2.15 |
Asbestos
waste that is produced should be handled in accordance with the Code of
Practice on the Handling, Transportation and Disposal of Asbestos
Wastes. Detailed requirements have
been presented in the Asbestos Study Report. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Type
1 asbestos wastes (bonded asbestos wastes (other than blue or brown asbestos)
in good condition) shall be packed with 2 individual layers of strong
transparent plastic sheets of not less than 0.15 mm thickness and completely
sealed with adhesive tapes. Type 1
waste shall be packed in suitable sizes for easy handling. The height of each
package shall not exceed 750 mm. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Type
2 asbestos wastes (any waste containing loose asbestos fibres (other than
blue or brown asbestos)) must be contained, as soon as it is produced, in
strong bags made from plastic or other containers approved by EPD. The bags should be goose-neck sealed by
means of adhesive tapes. A bag filled
with asbestos waste should be placed inside another plastic bag to provide
additional protection. The colour of
the inner bag should be white while the outer bag should be transparent to
facilitate visual inspection. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
handling of Type 3 asbestos wastes (all blue asbestos (crocidolite)
and brown asbestos (amosite), whether in good
condition or not, or any articles contaminated by blue or brown asbestos)
should be similar to that of Type 2 except that the colour of the inner bags
should be orange. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
All
storage of asbestos waste should be carried out properly in a secure place
isolated from other substances so as to prevent any possible release of
asbestos fibres into the atmosphere and contamination of other
substances. Type 1 asbestos waste
should not be stored together with Types 2 and 3 asbestos wastes so as to
avoid damage to the plastic bags of Type 2 or 3 asbestos waste, unless the
bags are packed in boxes or drums for additional protection. Bagged asbestos
waste should not be stacked more than 3 bags high in order to avoid damage to
the bottom bag. The storage area
should be isolated from other working areas and bear warning panels to alert
people of the presence of asbestos waste. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Disposal
of asbestos wastes shall not commence before a designated notification has
been given to EPD and confirmed.
Before being transported for disposal, all the asbestos waste produced
should be stored in a temporary storage area. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Section 7 of the Code of Practice on the Handling, Transportation and Disposal of
Asbestos Waste. |
ü |
|
|
All
asbestos wastes for disposal should be transported by an asbestos waste
collector licensed by EPD and in a designated vehicle equipped as stated in
the Code of Practice. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
ash/rubble in between the Chimneys A and B on-site shall be treated by
solidification / stabilisation with cement, and the treated ash shall be
sealed into steel drums lined with plastic sheeting prior to disposal at
designated areas in the landfill. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
proposed disposal method for ash waste is to be collected up and stabilised
to meet landfill disposal criteria of EPD.
In such case, it is envisaged that the process would involve
collection and mixing the ash material with cement. Pilot mixing and TCLP tests would establish
the ratio of cement to ash to the satisfaction of EPD. The materials for disposal would then be
treated and the extracted material placed into polythene lined steel
drums. Transparent plastic sheeting of
0.15mm thickness low-density polythene or PVC should be employed. The drums should be 16 gauge
steel or thicker and fitted with double bung fixed ends adequately sealed and
well labelled in new or good condition.
Prior agreement of the disposal criteria from EPD and agreement to
disposal from the landfill operator must be obtained. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
release of contaminants from disturbed ash should be minimised prior to
gathering up the ash materials and amended water containing a wetting agent
should be sprayed on the ash. The
wetting agent will assist in water penetration to thoroughly soak the ash and
ensure dust levels are reduced without using excessive water. (Spray shall comprise 50% polyoxyethylene ester and 50% polyoxyethylene
ether, or equivalent, diluted to specific concentration in accordance with
the manufacturer’s instructions). The
use of amended water for dust suppression will minimise the use of excessive
water that would result in surface runoff in the removal process. Dust suppression can be carried out in a
controlled manner and no insurmountable environmental problem would result. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Where
the level of dioxin contaminants exceeded the USEPA criterion of 1ppb (parts
per billion) by weight, the remediation strategies for contaminated material
are recommended as follows: a)
Ash/rubble waste shall be collected up and stabilised / solidified to meet
landfill disposal criteria of EPD, 1 part per billion (1ppb TEQ) TCLP; b) It
is envisaged that the process would involve collection and mixing the
ash/rubble material with cement followed by sealing in polythene lined steel
drums; c)
Pilot mixing of the ash with progressively greater proportions of cement
would precede the treatment; and d)
The stabilised / solidified DCM that is contained in polythene lined steel
drums shall be transported for landfill disposal. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
chimney interior shall be brushed clean.
The brushed out materials including ash and dust shall be sealed in steel
drums before disposal at the CWTC.
Subsequently the internal brick lining shall be scrabbled and HEPA
vacuumed to thoroughly remove the ash attached. The clean bricks shall then be dismantled
from top to bottom and placed inside steel drums before disposal at the
landfill. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Proper
decontamination facilities similar to that employed in asbestos removal works
(i.e. 3-chamber decontamination units) shall be adopted. Workers shall be
protected with disposable coveralls and appropriate respirators suitable for
protection against asbestos fibre and dioxin, as well as to fulfil confined
space requirements. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
flue sections shall either be thoroughly cleaned with high efficiency vacuum
and wet cloth to remove all dioxin-contaminated ash, or the dismantled
sections, considered as chemical wastes, wrapped with impermeable polythene
sheets for proper disposal to landfill following the requirements of the Waste Disposal (Chemical Waste) (General)
Regulation. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
Waste Disposal (Chemical
Waste) (General) Regulation. |
ü |
|
|
The
required decontamination shall be conducted under negative pressure with all
openings and uncontaminated areas sealed with impermeable plastics. This requirement is analogous to the ‘full
containment’ requirements for asbestos removal works. The chimney flues should be taken down in
manageable sections within the containment, and any ash deposits scrapped off
and sealed in drums for disposal to landfill site. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
The
flue sections shall either be cleaned with high efficiency vacuum and wet
cloth, or wrapped with impermeable plastics for disposal to landfill
site. The flues will be removed from
top down and hence the ACM will be removed when the removal of chimney flue
sections has proceeded down to the levels where the ACM is located. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
|
|
Given
the nature of the work and the contaminants involved consideration should be
given to the use of decontamination facilities (showers) that should be
provided for the workforce to remove contamination after work. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s Contractor |
|
ü |
|
|
ü |
7.10.21 |
5.2.28 |
Different
types of waste should be segregated and stored in different containers, skips
or stockpiles to enhance reuse or recycling of materials and their proper
disposal. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.22 |
5.2.39 |
An
on-site temporary storage area should also be provided. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
|
ü |
7.10.25 |
5.2.32 |
A
recording system for the amount of wastes generated, recycled and disposed
(including the disposal sites) should be proposed. |
KTCDA
Site - Phase 1 Part 1 |
CEDD’s
Contractor |
|
ü |
|
ETWB TC(W) No. 15/2003 |
ü |
^ Implementation
Status:
ü implemented
Ï not implemented
P partially
implemented
X rectified by
Contractor
Table
C‑5 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 |
¨ 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 Airborne
Fibre Monitoring Results
Not applicable for this Reporting Month
Appendix G Noise Monitoring
Results and Graphical Presentation
Appendix H Photo Records
for the Repairing of Deteriorated Cracks on Existing Concrete Ground Slab
Not applicable for this Reporting Month