TABLE OF CONTENTS

 

 

EXECUTIVE SUMMARY

1.      Basic Project Information. 77

2.      Environmental Status. 1111

3.      Monitoring Results. 1313

4.      Summary of Complaints, Notification of Summons and Prosecutions. 2121

5.      EM&A Site Inspection. 2323

6.      Future Key Issues. 2424

7.      Conclusion and Recommendations. 2626

 

List of Appendices

 

A.    Alignment and Works Area for the Contract No. HY/2014/08

B.    Construction Programme

C.    Project Organization Chart

D.    Dust Event-Action Plan (EAP)

E.    Noise Event-Action Plan (EAP)

F.     Environmental Mitigation Implementation Schedule (EMIS)

G.    Monitoring Schedules of the Reporting Month

H.    Calibration Certificate (Air Monitoring)

I.      Calibration Certificate (Noise)

J.      The Certification of Laboratory with HOKLAS Accredited Analytical Tests

K.    Location Plan of Noise and Air Quality Monitoring Station

L.    Monitoring Data (Air Monitoring)

M.  Monitoring Data (Noise)

N.    Waste Flow Table

O.    Statistics on Complaint, Notifications of Summons and Successful Prosecutions

P.     Monitoring Schedule of the Coming Month

Executive Summary

 

A.1          Build King – SK ecoplant Joint Venture (“Contractor”) commenced the construction works of Highway Department (HyD) Central Kowloon Route Contract No. HY/2014/08 – Section of Yau Ma Tei East (“The Project”) on 20 April 2018. This is the 52nd monthly Environmental Monitoring and Audit (EM&A) report presenting the EM&A works carried out during the period from 1 July 2022 to 31 July 2022.

 

A.2          A summary of the construction works reported by Main Contractor for the Project during the reporting month is listed below.

 

Construction Activities undertaken  

·         Construct D-wall panels, pumping test, excavation to roof slab & construct roof slab at Zone B

·         Construct D-walls, buttress walls, install king posts/RW/OW/PW, construct traffic deck and carry out pumping test at Zone B

·         Construct D-walls, buttress walls, install king posts/RW/OW/PW, construct roof slab, traffic deck and carry out pumping test at Zone C

·         Construct D-walls/Pipe Piles, buttress walls, install king posts/RW/OW/PW, construct traffic deck and carry out pumping test at Zone D

·         Divert DN 900 sewer pipes, demolition of CLP Cable Tunnel A and handover back to CLP, Jet Grouting at Zone F/B3

·         Construct pipe piles & divert DN1800 drainage at Zone G & implement TTA at Zone G

·         Construct portal frame across, demolish existing Gascoigne Road flyover beams and construct end span at Portion 21

·         Construct bridge deck for spans P4 and P6 include bottom tendon stressing at Gascoigne Road flyover.

·         Construct socketed H-piles, pile caps, ground beams and erect steel posts of Noise Enclosure at Zone 3.

·         Underground Utilities diversion, construct permanent & temporary pipe piles, barrette walls for Noise Enclosure at Zone 2.

 

A.3          A summary of regular construction noise and construction dust monitoring activities in this reporting period is listed below:

Regular construction noise monitoring during normal working hours

W-N1A, W-P11, W-N18, W-N25A

 

5 times

 

Construction dust (24-hour TSP) monitoring

W-A1

W-A6

5 times

5 times

 

 

Construction dust (1-hour TSP) monitoring

W-A1, W-A6

15 times

 

 

 

 

 

A.4          Bi-weekly inspection of the implementation of landscape and visual mitigation measures was conducted on 7 and 21 July 2022. Details of the audit findings and implementation status are presented in Section 5.

A.5          Joint weekly site inspections were conducted by representatives of Environmental Team (ET), Contractor and Engineer on 7, 14, 21 and 28 July 2022. One joint site inspection with IEC was also undertaken on 14 July 2022. Details of the audit findings and implementation status are presented in Section 5.

 

A.6          Details of waste management are presented in Section 3.

 

A.7          No exceedance of the Action and Limit Levels of 1 hour TSP, 24 hour TSP and construction

noise monitoring was recorded during the reporting month.

 

A.8          No complaint and non-compliance was reported in the reporting month.

 

A.9          No notification of summon or prosecution was received in this reporting month.

 

A.10       A summary of the construction activities provided by Main Contractor in the next reporting month is listed below:

Construction Activities to be undertaken

l      Excavation and construction of bottom slab at Zone A.

l      Concrete screening onto newly constructed roof slab at Zone B. Installation of UU Hanger Support, exposure of box culvert and plugging of abandoned pipe at Zone B.

l      Construction of buttress wall and install RW, OW, PW at Zone B.

l      TAM grouting between Zones B2 & C1, install RW/OW/PW and construct temporary traffic deck at Zones C1, C2 & C3.

l      Construction of remaining buttress wall, installation of king posts/RW/OW/PW and erection of temporary traffic deck at Zone D.

l      Preparation works for D-wall construction at Zone F.

l      Continue partial demolition works of Cable Tunnel A (reinstatement works) at Zone F.

l      Trial pit excavation at Zone G

l      Works for GRF at HKAA area: Demolition of 3 concrete beams for GRF in Portion 21, install temporary parapet and noise barriers and footing construction for P7L end span construction.

l      Bridge Works:-

                             i.        Bridge deck construction for P4L.

                           ii.        Bridge deck construction for P6L.

                          iii.        Falsework erection for P1L end span construction

                          iv.        Pier construction for P2L  

l      Continue socketed H-pile works for middle/east foundation and west side of Noise Enclosure in Zone 3, ELS and construction works for pile caps and ground beams construction for middle/east foundation for Zone 3 Noise Enclosure.

l      Erection of Y columns and side columns for Noise Enclosure in Zone 3 (night works).

l      Works at Zone 2 Noise Enclosure scheduled as the following:

                             i.        Column E – ELS works and pile cap construction;

                           ii.        Column G – Gas main diversion, 400kV CLP cable diversion and permanent diversion of uncharted 1200mm dia. drainage pipe;

                          iii.        Column C & A1- Temporary socketed H-pile works;

                          iv.        Column A – Complete construction of 2nd Barrette Wall and ELS works for pile cap construction.

l      Noise Enclosure steelworks fabrication at Fabrication Yard in Zhuhai, China.

l      Erection of Y columns and side columns for Noise Enclosure in Zone 3

l      Monitoring of instrumentation for all areas.

 

1.             Basic Project Information

1.1.     Central Kowloon Route (CKR) is a 4.7 km long dual 3-lane trunk road in Central Kowloon linking Yau Ma Tei Interchange in West Kowloon with the road network on Kai Tak Development and Kowloon Bay in East Kowloon.

1.2.     The Central Kowloon Route – Design and Construction Environmental Impact Assessment Report (Register No.: AEIAR-171/2013) was approved with conditions by the Environmental Protection Department (EPD) on 11 July 2013. An Environmental Permit (EP 457/2013) was issued on 9 August 2013. Variations of EP (VEP) was applied for and the EP (EP-457/2013/C) was issued by EPD on 16 January 2017. Variations of EP (VEP) was subsequently applied for and the latest EP (EP-457/2013/D) was issued by EPD on 15 June 2021. A Further EP (FEP-03/457/2013/D) was issued by EPD on 5 November 2021.

1.3.     The construction of the CKR had been divided into different sections. This Contract No. HY/2014/08 – Section of Yau Ma Tei East (YMTE) covers part of the construction activities located at Yau Ma Tei under the EP and FEP which includes:

ž  Section of Yau Ma Tei East

                            i.                        Construction of Cut-and-Cover Tunnel in compliance with all statutory requirements and the requirements specified under the Contract while maintaining the traffic with all necessary provisions

                          ii.                        Construction and subsequent handover of Yau Ma Tei Access Shaft for facilitating the access and use by the contractor of Central Kowloon Route - Central Tunnel contract

                         iii.                        Demolition of existing buildings including Yau Ma Tei Multi-storey Carpark Building, Yau Ma Tei Specialist Clinic Extension Building and Yau Ma Tei Jade Hawker Bazaars

                         iv.                        Demolition and re-provisioning of Gascoigne Road Flyover and the underpinning works for the existing Ferry Street Flyover and Yau Ma Tei Police Station New Wing Building

                           v.                        Construction of civil provisions and coordination with the contractor of Central Kowloon Route - Tunnel Electrical & Mechanical contract

                         vi.                        Design and construction of Noise Barrier Works

                       vii.                        Prepare temporary traffic arrangement proposals, discuss at Traffic Management Liaison Group meeting and obtain its agreement and approval/ endorsement from relevant authorities at suitable times to enable the execution of the Works

The alignment and works area for the Contract No. HY/2014/08 - are shown in Appendix A.

1.4.     A summary of the major construction activities undertaken in this reporting period is shown in Table 1.1. The construction programme is presented in Appendix B.

Table 1.1 Summary of the Construction Activities reported by Main Contractor during the Reporting Month

Construction Activities undertaken

·         Construct D-wall panels, pumping test, excavation to roof slab & construct roof slab at Zone B

·         Construct D-walls, buttress walls, install king posts/RW/OW/PW, construct traffic deck and carry out pumping test at Zone B

·         Construct D-walls, buttress walls, install king posts/RW/OW/PW, construct roof slab, traffic deck and carry out pumping test at Zone C

·         Construct D-walls/Pipe Piles, buttress walls, install king posts/RW/OW/PW, construct traffic deck and carry out pumping test at Zone D

·         Divert DN 900 sewer pipes, demolition of CLP Cable Tunnel A and handover back to CLP, Jet Grouting at Zone F/B3

·         Construct pipe piles & divert DN1800 drainage at Zone G & implement TTA at Zone G

·         Construct portal frame across, demolish existing Gascoigne Road flyover beams and construct end span at Portion 21

·         Construct bridge deck for spans P4 and P6 include bottom tendon stressing at Gascoigne Road flyover.

·         Construct socketed H-piles, pile caps, ground beams and erect steel posts of Noise Enclosure at Zone 3.

·         Underground Utilities diversion, construct permanent & temporary pipe piles, barrette walls for Noise Enclosure at Zone 2.

1.5.     The project organisational chart specifying management structure and contact details are shown in Appendix C.

1.6.     A summary of the valid permits, licences, and /or notifications on environmental protection for this Project is presented in Table 1.2.

Table 1.2 Summary of the Status of Valid Environmental Licence

Notification, Permit and Documentations

Permit/ Licences/ Notification

/Reference No.

Valid Period

Status

Remark

From

To

Environmental Permit

EP-457/2013/D

15 Jun 2021

End of Project

Valid

-

Further Environmental Permit

FEP-03/457/2013/D

5 Nov 2021

End of Project

Valid

 

Wastewater Discharge License

WT00030660-2018

28 Mar 2018

31 Mar 2023

Valid

-

Notification of Construction Works under the Air Pollution Control (Construction Dust) Regulation

471691

14 Sep 2021

End of Project

Notified

-

Chemical Waste Producer Registration

WPN5213-225-B2526-01

14 Mar 2018

End of Project

Valid

-

Billing Account for Disposal of Construction Waste

7029997

1 Feb 2018

End of Project

Valid

-

Construction Noise Permit

GW-RE0529-22

31 May 2022

26 Nov 2022

Valid

Construction Noise Permit at Zone A & B1

GW-RE0643-22

30 Jun 2022

29 Sep 2022

Valid

Construction Noise Permit at Zone B2

GW-RE0360-22

15 Apr 2022

14 Jul 2022

Supersede by

GW-RE0716-22

Construction Noise Permit at Zone 3

GW-RE0716-22

15 Jul 2022

14 Jan 2023

Valid

GW-RE0492-22

20 May 2022

19 Nov 2022

Valid

Construction Noise Permit at P6

GW-RE0637-22

28 Jun 2022

27 Sep 2022

Valid

Construction Noise Permit at Zone D & P4

GW-RE0648-22

27 Jun 2022

31 Aug 2022

Valid

Construction Noise Permit at GRF for Temporary Erection of Bridge Decking

GW-RE0711-22

12 Jul 2022

31 Aug 2022

Valid

Construction Noise Permit for Formtraveller Assembly and Launching at Battery Street

GW-RE0472-22

16 May 2022

15 Aug 2022

Valid

Construction Noise Permit at Multi-storey Carpark Building

GW-RE0617-22

18 Jun 2022

31 Aug 2022

Valid

Construction Noise Permit for Temporary Shutdown Traffic Light Control

GW-RE0700-22

14 Jul 2022

31 Aug 2022

Valid

Construction Noise Permit for installation of Overhead Traffic Signal at Ferry Street southbound near Kansu Street

GW-RE0707-22

17 Jul 2022

28 Aug 2022

Valid

Construction Noise Permit for TTA Implementation of Stage 4.0

GW-RE0758-22

27 Jul 2022

30 Sep 2022

Valid

Construction Noise Permit for Inspection and Maintenance (Road Resurfacing)

GW-RE0723-22

23 Jul 2022

30 Sep 2022

Valid

Construction Noise Permit for disassembly, assembly and lanching of Form Traveller at Kansu Street between Shanghai Street and Canton Road

Marine Dumping Permit

EP/MD/23-016

23 Jun 2022

22 Dec 2022

Valid

Type 1- Open Sea Disposal

EP/MD/23-015

23 Jun 2022

22 Jul 2022

Supersede by

EP/MD/23-021

Dumping at Sea Permit (Type 1 – Open Sea Disposal (Dedicated Site) & Type 2 - Confined Marine Disposal)

EP/MD/23-021

23 Jul 2022

22 Aug 2022

Valid

 

2.             Environmental Status

2.1.     Environmental permit (EP) conditions under the EIAO, submission status under the EP and implementation status of mitigation measures had been reviewed and implemented on schedule. The status of required submissions under the EP (EP-457/2013/D) and FEP (FEP-03/457/2013/D) as of the reporting period for the Project are summarised in Table 2.1

Table 2.1 Summary of Status of Required Submission for EP-457/2013/D and

FEP-03/457/2013/D for the Project

EP/FEP Condition

(EP-457/2013/D)

(FEP-03/457/2013/D)

Submission

Submission date

Condition 3.4

Monthly EM&A Report (Jun 2022)

13 Jul 2022

2.2.     Details of the major construction activities reported by Main Contractor in this reporting period are shown in Table 2.2.

Table 2.2 Summary of the Construction Activities reported by Main Contractor during the Reporting Month

Construction activities undertaken

Remarks on progress

·         Construct D-wall panels, pumping test, excavation to roof slab & construct roof slab at Zone B

· 90% completion

·         Construct D-walls, buttress walls, install king posts/RW/OW/PW, construct traffic deck and carry out pumping test at Zone B

· 94% completion

·         Construct D-walls, buttress walls, install king posts/RW/OW/PW, construct roof slab, traffic deck and carry out pumping test at Zone C

· 95% completion

·         Construct D-walls/Pipe Piles, buttress walls, install king posts/RW/OW/PW, construct traffic deck and carry out pumping test at Zone D

· 86% completion

·         Divert DN 900 sewer pipes, demolition of CLP Cable Tunnel A and handover back to CLP, Jet Grouting at Zone F/B3

· 63% completion

·         Construct pipe piles & divert DN1800 drainage at Zone G & implement TTA at Zone G

· Completed

·         Construct portal frame across, demolish existing Gascoigne Road flyover beams and construct end span at Portion 21

· 45% completion

·         Construct bridge deck for spans P4 and P6 include bottom tendon stressing at Gascoigne Road flyover.

· 68% completion

·         Construct socketed H-piles, pile caps, ground beams and erect steel posts of Noise Enclosure at Zone 3.

· 50% completion

·         Underground Utilities diversion, construct permanent & temporary pipe piles, barrette walls for Noise Enclosure at Zone 2.

· 55% completion

2.3.     The drawing showing the project layout and the location of the monitoring station and environmental sensitive receivers are attached in Appendix A and Appendix K. Co-ordinates of the monitoring location are shown in Table 2.3.

 

Table 2.3 Summary for the location of the monitoring station

Monitoring Location

Location ID

Latitude

Longitude

Yau Ma Tei Catholic Primary School (Hoi Wang Road)

W-A1/ W-N1A

22.313357

114.16409

Man Cheong Building

W-A6

22.308185

114.166033

Hydan Place

W-N18

22.30858

114.170185

Prosperous Garden Block 1

W-N25A

22.309846

114.168072

The Coronation Tower 1

W-P11

22.309824

114.165616

 

3.             Monitoring Results

3.1.              Monitoring Parameters

Air Quality

3.1.1.        The impact monitoring had been carried out in accordance with section 5.8 of the approved EM&A Manual to determine the 1-hour and 24-hour total suspended particulates (TSP) levels at the monitoring locations in the reporting month.

3.1.2.        The sampling frequency of at least once in every 6 days, shall be strictly observed at the monitoring stations for 24-hour TSP monitoring. For 1-hour TSP monitoring, the sampling frequency of at least 3 times in every 6 days should be undertaken when the highest dust impact occurs.

3.1.3.        General meteorological conditions (wind speed, direction and precipitation) and notes regarding any significant adjacent dust producing sources had also been recorded throughout the impact monitoring period.

Noise

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

3.1.5.        For all other time periods, Leq (5min) shall be employed for comparison with the Noise Control Ordinance (NCO) criteria.

3.1.6.        As supplementary information for data auditing, statistical results such as L10 and L90 shall also be obtained for reference.

3.2.              Monitoring Equipment

                Air Quality

3.2.1.        1-hour TSP levels and 24-hour TSP had been measured with direct reading dust meter and High Volume Samplers respectively. It has been demonstrated its capability in achieving comparable results with high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50).

3.2.2.        The 1-hour TSP meter was calibrated by the manufacturer prior to purchasing. Zero response of the instrument was checked before and after each monitoring event.  Operation of the 1-hour TSP meter followed manufacturer’s Operation and Service Manual. The 24-hour TSP meter was calibrated against firmware 80570-8100-V1.0.4, annually. Operation of the 24-hour TSP meter followed manufacturer’s Operation and Service Manual. Valid calibration certificates of dust monitoring equipment are attached in Appendix H.

3.2.3.        A summary of the equipment that was deployed for the 24- hour averaged monitoring is shown in Table 3.1. The TSP monitoring was conducted as per the schedule presented in Appendix G.

3.2.4.        The equipment used for 1-hour TSP and 24-hour TSP measurement and calibration are summarised in Table 3.1

Table 3.1 Construction Dust Monitoring Equipment

Monitoring Parameter

Monitoring Equipment

Serial Number

Date of Calibration

1-hour TSP

LD-5R Digital Dust Indicator

992821

19 Sep 2021

LD-5R Digital Dust Indicator

982820

3 Apr 2022

24-hour TSP

TE-5170X High Volume Sampler

1084

30 Jun 2022 and 16 Jul 2022

TE-5170X High Volume Sampler

1050

30 Jun 2022 and 16 Jul 2022

TE-5028A Calibration Kit

3702

3 Aug 2021

 

            Noise

3.2.5.        Sound level meter in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications has been used for carrying out the noise monitoring. The sound level meter has been checked using an acoustic calibrator. The wind speed and other metrological data has been recorded from Hong Kong Observatory- King’s Park meteorological station, along with portable wind speed meter stand by as back up when the information are not available from HKO.

3.2.6.        Acoustic calibrators and sound level meters using for the monitoring is within the valid period and were calibrated per year. Valid calibration certificate of noise monitoring equipment is attached in Appendix I.

3.2.7.        The details of equipment using for monitoring are listed in Table 3.2, as below:

Table 3.2 Monitoring Equipment Used in Monitoring

Monitoring Equipment

Serial Number

Date of Calibration

Nti XL2 Sound Level Meter

A2A-13661-E0

23 Sep 2021

Lutron SL-4033SD Sound Level Meter

I.491835

3 Jan 2022

Pulsar 105 Acoustic Calibrator

63705

7 Aug 2021

3.3.              Monitoring Methodology and QA/QC results

     Air Quality

3.3.1.        The 1-hour TSP monitor, portable dust meters (Sibata Digital Dust Indicator Model LD-5R) was used for the impact monitoring.  The 1-hour TSP meters provides a real time 1-hour TSP measurement based on 90o light scattering. Three 1-hour TSP level were logged per every six days.

3.3.2.        The 24-hour TSP monitor, High Volume Samplers (Tisch TE-5170X High Volume Air Sampler) were used for the impact monitoring. The 24-hour TSP monitoring consists of the following:

u  The HVS was set at the monitoring location, with electricity supply connected and secured;  

u  HVS was calibrated before commencing the 1st measurement;

u  The filter paper was weight and provided by HOKLAS lab (Acumen Laboratory and Testing Limited and ALS Technichem (HK) Pty Ltd) before and after the sampling. Certificate of HOKLAS accredited laboratory can be referred to Appendix J;

u  The airflow over time during sampling process was recorded by the HVS.

 

3.3.3.        HVSs were free-standing with no obstruction. The following criteria were considered in the installation of the HVS:

u  Appropriate support to secure the samples against gusty wind needed to be provided the monitoring station;

u  A minimum of 2m separation from walls, parapets and penthouses was required for rooftop samplers;

u  No furnace or incinerator flues was nearby;

u  Airflow around the sampler was unrestricted; and

u  Permission could be obtained to set up the samplers and gain access to the monitoring station.

 

3.3.4.        Preparation of Filter Papers

u  Glass fiber filters were labelled and sufficient filters that were clean and without pinholes were selected;

u  All filters were equilibrated in the conditioning environment for 24 hours before weighing. The conditioning environment temperature was around 25℃ and not varied by more than ±3℃; the relative humidity (RH)was 40%; and

u  Acumen Laboratory and Testing Limited and ALS Technichem (HK) Pty Limited, as HOKLAS accredited laboratory, implemented comprehensive quality assurance and quality control programmes on the filters.

 

3.3.5.        Field Monitoring

u  The power supply was checked to ensure that the HVS was working properly;

u  The filter holder and area surrounding the filter were cleaned;

u  The filter holder was removed by loosening the foul bolts and a new filter, with stamped number upward, on a supporting screen was aligned carefully;

u  The filter was properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter;

u  The swing bolts were fastened to hold the filter holder down to the frame. The pressure applied should be sufficient to avoid air leakage at the edges;

u  The shelter lid was closed and secured with an aluminum strip;

u  The HVS was warmed- up for about 5 minutes to establish run- temperature conditions;

u  A new flow rate record sheet was inserted into the flow recorder;

u  The flow rates of the HVS was checked and adjusted to between 0.64-1.52m3min-1, which was within the range specified in the EM&A Manual (i.e. 0.6- 1.7m3min-1);

u  The programmable timer was set for a sampling period of 24 hours, and the starting time, weather condition and filter number were recorded;

u  The initial elapsed time was recorded;

u  At the end of sampling, the sampled filter was removed carefully and folded in half so that only surfaces with collected particulate matter were in contact;

u  The filter paper was placed in a clean plastic envelope and sealed; all monitoring information was recorded on a standard data sheet and

u  The filters were sent to (Acumen Laboratory and Testing Ltd and ALS Technichem (HK) Pty Ltd) for analysis.

 

3.3.6.        Maintenance and Calibration

u  The HVS and their accessories were maintained in a good working condition. For example, motor brushes were replaced routinely and electrical wiring was checked to ensure a continuous power supply; and

u  The flow rate of each HVS with mass flow controller was calibrated using an orifice calibrator, Initial calibrations of the dust monitoring equipment were conducted upon installation and prior to commissioning. Five- point calibration was carried out for HVS using TE-5025 Calibration Kit. HVS is calibrated bimonthly. The calibration records for the HVS is given in Appendix H.

 

3.3.7.        Wind Data Monitoring

u  The wind speed has been recorded from Hong Kong Observatory- King’s Park meteorological station, along with portable wind speed meter stand by as back up when the information are not available from HKO.

 

Noise

3.3.8.        All noise measurements by the meter were set to FAST response and on the A-weighted equivalent continuous sound pressure level (Leq) in decibels dB(A). LAeq(30min) was used as the monitoring metric for the time period between 0700 –1900 hours on normal weekdays. The measured noise levels were logged every 5 minutes throughout the monitoring period.

3.3.9.        Prior to the noise measurement, the accuracy of the sound level meter was checked using an acoustic calibrator generating a known sound pressure level at a known frequency.  Checking was conducted before and after the monitoring. The calibration level before and after the noise measurement is agreed to within 1.0 dB(A).

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

3.4.              Monitoring Locations

Air Quality

3.4.1.        During the site visit, both of the original proposed dust monitoring locations were rejected due to the condition at The Coronation was not favourable for monitoring and the access was declined by the management office of Hong Kong Community College (HKCC) of PolyU. Two alternative air monitoring stations Yau Ma Tei Catholic Primary School (Hoi Wang Road) and Man Cheong Building had been proposed by ET and approved by IEC. 2 designated air monitoring locations were identified and agreed with IEC and EPD. Details of air monitoring stations are described in Table 3.3. The location plan of air quality monitoring stations is shown in Appendix K.

Table 3.3 Location of the Dust Monitoring Stations

Air Quality Monitoring Station

Dust Monitoring
Station

W-A1

Yau Ma Tei Catholic Primary School (Hoi Wang Road)

W-A6

Man Cheong Building

 

Noise

3.4.2.        During the site visit, one of the original proposed noise monitoring locations Tak Cheong Building was rejected by the president of the owner’s corporation. Alternative noise monitoring station Hydan place had been proposed by ET and approved by IEC. 4 noise sensitive receivers designated noise monitoring locations were identified and agreed with IEC and EPD. The designated monitoring stations are identified and access was granted by the premises. The details of noise monitoring stations are described in Table 3.4 and the location plan of noise monitoring station is shown in Appendix K.

Table 3.4 Noise Monitoring Stations

Noise

Monitoring Station

Identified Noise

Monitoring Station

Type of Measurement

W-N1A

Yau Ma Tei Catholic Primary School (Hoi Wang Road)

Façade

W-N18

Hydan Place

Façade

W-N25A

Prosperous Garden Block 1

Façade

W-P11

The Coronation Tower 1

Façade

3.5.              Monitoring date, time, frequency and duration

3.5.1.        A summary of impact monitoring duration, sampling parameter and frequency is presented in Table 3.5.

 

 

 

Table 3.5 Summary of Impact Monitoring Programme

Impact Monitoring

Duration

Sampling Parameter

Frequency

Dust

1-hour continuous measurement

1-hour TSP

3 times per six days

Dust

24-hour continuous sampling

24-hour TSP

Once per six days

Noise

30-minute continuous measurement

Leq 30 min,

L10 and L90 as reference.

Once per week (0700 – 1900)

3.6.              Result Summary

Air Quality

3.6.1.        According to our field observations, the major dust source identified at the designated air quality monitoring stations in the reporting month are summarised in Table 3.6.

Table 3.6 Observation at Dust Monitoring Stations

Monitoring Station

Major Dust Source

W-A1

Nearby traffic

W-A6

Nearby traffic

3.6.2.    Air quality impact monitoring for the reporting month was carried out on 4, 8, 14, 20 and 26 July 2022.

3.6.3.    The results for 1-hour TSP and 24-hour TSP are summarized in Table 3.7 and Table 3.8. The measurement data and details of influencing factors such as weather conditions and site observation are presented in Appendix L.

Table 3.7 Summary of 1-hour TSP Monitoring Results

Monitoring Location

Range(μg/m3)

Action Level(μg/m3)

Limit Level(μg/m3)

W-A1

41-59

319

500

W-A6

58-79

306

500

Table 3.8 Summary of 24-hour TSP Monitoring Results

Monitoring Location

Range(μg/m3)

Action Level(μg/m3)

Limit Level(μg/m3)

W-A1

13-28

167

260

W-A6

19-44

166

260

Noise

3.6.4.        According to our field observations, the major noise source identified at the designated noise monitoring station in the reporting month are summarised in Table 3.9:

 Table 3.9 Observation at Noise Monitoring Stations

Monitoring Station

Major Noise Source

W-N1A

Nearby traffic

W-N18

Nearby traffic

W-N25A

Nearby traffic

W-P11

Nearby traffic

3.6.1.     The construction noise impact monitoring for the reporting month was carried out on 4, 8, 14, 20 and 26 July 2022.

3.6.2.        The result for noise monitoring is summarized in Table 3.10. The measurement data are shown in Appendix M.

Table 3.10 Summary of Noise Monitoring Results

Time Period

Monitoring

location

Parameter

Range, dB(A)

 

 

Leq

L10

L90

Action Level

Limit Level#

Normal working hour from 0700-1900

W-N1A

Leq 30min

57.5-59.6

58.6-62.1

54.6-56.4

When one documented complaint is received

70dB(A) or 65 dB(A) during examination

W-N18

69.2-71.7

72.0-74.0

66.7-68.0

75dB(A)#

W-N25A

68.6-70.2

70.3-73.3

65.9-67.1

W-P11

65.5-66.3

66.9-68.7

62.5-64.9

 

Remarks:

1.      # If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit by the Noise Control Authority have to be followed.

Waste management

3.6.3.        The waste generated from this Project includes inert C&D materials, and non-inert C&D materials. Non-inert C&D materials are made up of general refuse, vegetative wastes and recyclable wastes such as plastics and paper/cardboard packaging waste. Steel materials generated from the project are also grouped into non-inert C&D materials as the materials were not disposed of with other inert C&D materials. With reference to relevant handling records and trip tickets of this Project, the quantities of different types of waste generated in the reporting month are summarised in Table 3.11. Details of cumulative waste management data are presented as a waste flow table in Appendix N.

 Table 3.11 Quantities of waste generated from the Project

Reporting period

Quantity

Inert C&D Materials

(in ‘tonnes)

Chemical Waste

(in‘000 Kg)

Non-inert C&D Materials

 Others, e.g. General Refuse disposed at Landfill

(in ‘tonnes)

Recycled materials

Paper/card board

(in ‘000 Kg)

Plastics

(in ‘000 Kg)

Metals

(in ‘000 Kg )

July-2022

5803.7

0.00

44.40

0.00

0.00

0.00

4.             Summary of Complaints, Notification of Summons and Prosecutions

4.1.     The Environmental Complaint Handling Procedure is shown in below Table 4.1:

 

Table 4.1 Environmental Complaint Handling Procedure

Complaint Received via Project Hotline

Complaint Received via 1823 or from other government departments

 

 

 

 

Contractor notify ER, ET and IEC

ER notify Contractor, ET and IEC

 

 

 

 

Contractor log complaint and date of receipt onto the complaint database. Contractor, ER and ET to conduct investigation of complaint

 

 

 

 

If complaint is considered not valid

If complaint is found valid

 

 

 

 

ET or ER to reply the complainant if necessary

Contractor to identify and implement remedial measures in consultation with the IEC, ET and ER.

 

 

 

 

 

 

The ER, ET and IEC to review the effectiveness of the Contractor's remedial measures and the updated situation; ET to undertake additional monitoring and audit to verify the situation if necessary, and oversee that circumstances leading to the complaint do not recur. ER to conduct further inspection as necessary.   

 

 

 

 

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

 

 

 

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

 

4.2.         Should non-compliance of the criteria occur, action in accordance with the Event and Action Plan in Appendix D and Appendix E shall be carried out.

 

4.3.         No exceedance of the Action and Limit Levels of 1 hour TSP, 24 hour TSP and construction

noise monitoring was recorded during the reporting month.

 

4.4.         No complaint and non-compliance was reported in the reporting month.

4.5.         No notification of summons and prosecution was received in the reporting period.

4.6.         Statistics on complaints, notifications of summons and successful prosecutions are summarized in Appendix O.

 

5.             EM&A Site Inspection

5.1.     Site inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures under the Contract. In the reporting period, four (4) site inspections were carried out on 7, 14, 21 and 28 July 2022, along with bi-weekly inspection of the implementation of landscape and visual mitigation measures conducted on 7 and 21 July 2022.

5.2.     One joint site inspection with IEC also undertaken on 14 July 2022. Minor deficiencies were observed during weekly site inspection. Key observations during the site inspections are summarized in Table 5.1.

Table 5.1 Site Observations

Date

Environmental Observations

Follow-up Status

7 July 2022

No major observation was found during site inspection.

-

14 July 2022

No major observation was found during site inspection.

-

21 July 2022

1.       The cement bags at Zone B3 should be covered with impervious sheeting at 3 sides.

2.       The NRMM labels of generator and excavators at Zone B1 and B3 were not in good condition.

1.     The cement bags at Zone B3 had been removed.

2.     The colorful NRMM labels of generator and excavators were posted at Zone B1 and B3.

28 July 2022

1.         The cement bags at Zone D should be covered with impervious sheeting at 3 sides.

1.      The cement bags at Zone D had been covered with impervious sheeting at 3 sides.

 

5.3.     The Contractor had rectified all observation identified during environmental site inspection in the reporting period.

5.4.     According to the EIA Study Report, Environmental Permit, contract documents and EM&A Manual, the mitigation measures detailed in the documents are implemented as much as practical during the reporting period. An updated Implementation Status of Environmental Mitigation Measures (EMIS) is provided in Appendix F.


6.             Future Key Issues

6.1.         The construction activities provided by Main Contractor in the next reporting month are:

l      Excavation and construction of bottom slab at Zone A.

l      Concrete screening onto newly constructed roof slab at Zone B. Installation of UU Hanger Support, exposure of box culvert and plugging of abandoned pipe at Zone B.

l      Construction of buttress wall and install RW, OW, PW at Zone B.

l      TAM grouting between Zones B2 & C1, install RW/OW/PW and construct temporary traffic deck at Zones C1, C2 & C3.

l      Construction of remaining buttress wall, installation of king posts/RW/OW/PW and erection of temporary traffic deck at Zone D.

l      Preparation works for D-wall construction at Zone F.

l      Continue partial demolition works of Cable Tunnel A (reinstatement works) at Zone F.

l      Trial pit excavation at Zone G.

l      Works for GRF at HKAA area: Demolition of 3 concrete beams for GRF in Portion 21, install temporary parapet and noise barriers and footing construction for P7L end span construction.

l      Bridge Works:-

                                i.     Bridge deck construction for P4L.

                              ii.     Bridge deck construction for P6L.

                             iii.     Falsework erection for P1L end span construction

                             iv.     Pier construction for P2L  

l      Continue socketed H-pile works for middle/east foundation and west side of Noise Enclosure in Zone 3, ELS and construction works for pile caps and ground beams construction for middle/east foundation for Zone 3 Noise Enclosure.

l      Erection of Y columns and side columns for Noise Enclosure in Zone 3 (night works).

l      Works at Zone 2 Noise Enclosure scheduled as the following:

                                i.     Column E – ELS works and pile cap construction;

                              ii.    Column G – Gas main diversion, 400kV CLP cable diversion and permanent diversion of uncharted 1200mm dia. drainage pipe;

                             iii.     Column C & A1- Temporary socketed H-pile works;

                             iv.   Column A – Complete construction of 2nd Barrette Wall and ELS works for pile cap construction.

l      Noise Enclosure steelworks fabrication at Fabrication Yard in Zhuhai, China.

l      Erection of Y columns and side columns for Noise Enclosure in Zone 3

l      Monitoring of instrumentation for all areas.

6.2.         Potential environmental impacts arising from the above construction activities are mainly associated with dust, construction noise and waste management.

6.3.         The tentative schedule of regular construction noise monitoring, 1-hour TSP and 24-hour TSP monitoring in the next reporting period is presented in Appendix P.

6.4.         The construction programme for the Project for the next reporting month is presented in Appendix B.

7.             Conclusion and Recommendations

7.1.         This 52nd monthly EM&A Report presents the EM&A works undertaken during the period from 1 July 2022 to 31 July 2022 in accordance with the EM&A Manual and the requirement under EP- 457/2013/D and FEP-03/457/2013/D.

7.2.         Air quality (including 1-hour TSP and 24-hour TSP) and noise impact monitoring were carried out in the reporting period. No exceedance of the Action Level and Limit Level was recorded for construction noise and air quality impact monitoring during the reporting month.

 

7.3.         Weekly environmental site inspections were conducted during the reporting period. Joint site inspection with IEC were carried out on 14 July 2022. Minor deficiency was observed during site inspection and was rectified within the specified deadlines. The environmental performance of the Project was therefore considered satisfactory.

 

7.4.         No complaint and non-compliance was reported in the reporting month.

7.5.         No notification of summons or prosecution was received in the reporting month.

7.6.         The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix A

Alignment and Works Area For the Contract No. HY/2014/08


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix B

Construction Programme

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix C

Project Organization Chart

Project O-Chart

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix D

Dust Event-Action Plan (EAP)

EVENT

ACTION

ET

IEC

ER

CONTRACTOR

ACTION LEVEL

1.Exceedance for one sample

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

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.

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

4. Repeat measurements to confirm findings;

5. Increase monitoring frequency to daily;

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

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

8. If exceedance stops, cease additional monitoring.

 

1. Check monitoring data submitted by ET;

2. Check Contractor’s working method;

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

4. Advise the ET 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. Ensure remedial measures properly implemented.

 

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

2. Implement the agreed proposals;

3. Amend proposal if appropriate.

LIMIT LEVEL

1.Exceedance for one sample

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

2. Inform ER, Contractor and EPD;

3. Repeat measurement to confirm finding;

4. Increase monitoring frequency to daily;

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

1. Check monitoring data submitted by ET;

2. Check Contractor’s working method;

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

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

5. Supervise implementation of remedial measures.

1. Confirm receipt of notification of failure in writing;

2. Notify Contractor;

3. Ensure remedial measures properly implemented.

1. Take immediate action to avoid further exceedance;

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

Implement the agreed proposals;

4. Amend proposal if appropriate.

2.Exceedance for two or more consecutive samples

1. Notify IEC, ER, Contractor and EPD;

2. Identify source;

3. Repeat measurement to confirm findings;

4. Increase monitoring frequency to daily;

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

6. Arrange meeting with 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 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. In consultation with the IEC, agree with the Contractor on the remedial measures to be implemented;

4. Ensure remedial measures properly implemented;

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

1. Take immediate action to avoid further exceedance;

2. Submit proposals for remedial actions to 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.

Note:

ET – Environmental Team                                              ER – Engineer’s Representative

IEC – Independent Environmental Checker

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix E

Noise Event-Action Plan (EAP)

EVENT

ACTION

ET

IEC

ER

CONTRACTOR

Action Level

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

2. Notify IEC and Contractor;

3. Report the results of investigation to the IEC, ER and Contractor;

4. Discuss with the Contractor and formulate remedial measures;

5. Increase monitoring frequency to check mitigation effectiveness.

1.Review the analysed results submitted by the ET;

2. Review the proposed remedial measures by the Contractor 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 analysed noise problem;

4. Ensure remedial measures are properly implemented

1. Submit noise mitigation proposals to IEC;

2. Implement noise mitigation proposals.

Limit Level

1. Identify source;

2. Inform IEC, ER, EPD and Contractor;

3. Repeat measurements to confirm findings;

4. Increase monitoring frequency;

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

6. Inform IEC, ER and EPD the causes and actions taken for the exceedances;

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 on the potential remedial actions;

2. Review Contractors 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 analysed noise problem;

4. Ensure remedial measures properly implemented;

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

1. Take immediate action to avoid further exceedance;

2. Submit proposals for remedial actions to 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.

Note:

ET – Environmental Team

IEC – Independent Environmental Checker

ER – Engineer’s Representative

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Appendix F

Environmental Mitigation Implementation Schedule (EMIS)

Environmental Mitigation Implementation Schedule –

Contract No. HY/2014/08 (Yau Ma Tei East)

 

 

EIA Ref.

EM&A Log Ref.

Recommended Mitigation Measures

Objectives of the Recommended Measures & Main Concerns to address

Implementation Agent

Location / Timing

Implementation Stage

Requirements and/ or standards to be achieved

Implementation Status

Construction Dust Impact

S4.3.10

D1

The contractor shall follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction stage

·    APCO

·    To control the dust impact To meet HKAQO and TM-EIA criteria

·   Implemented, deficiency rectified after observation

S4.3.10

D2

·  Mitigation measures in form of regular watering under a good site practice should be adopted.  Watering once per hour on exposed worksites and haul road should be conducted to achieve dust removal efficiencies of 91.7%.  While the above watering frequencies are to be followed, the extent of watering may vary depending on actual site conditions but should be sufficient to maintain an equivalent intensity of no less than 1.3 L/m2 to achieve the dust removal efficiency.

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction stage

·   APCO

·   To control the dust impact To meet HKAQO and TM-EIA criteria

·   Implemented

S4.3.10

D3

·     Proper watering at exposed spoil should be undertaken throughout the construction phase;

·     Any excavated or stockpile of dusty material should be covered entirely by impervious sheeting or sprayed with water to maintain the entire surface wet and then removed or backfilled or reinstated where practicable within 24 hours of the excavation or unloading;

·     Any dusty materials remaining after a stockpile is removed should be wetted with water and cleared from the surface of roads;

·     A stockpile of dusty material should not be extended beyond the pedestrian barriers, fencing or traffic cones;

·     The load of dusty materials on a vehicle leaving a construction site should be covered entirely by impervious sheeting to ensure that the dusty materials do not leak from the vehicle.

·     Where practicable, vehicle washing facilities with high pressure water jet should be provided at every discernible or designated vehicle exit point.  The area where vehicle washing takes place and the road section between the washing facilities and the exit point should be paved with concrete, bituminous materials or hardcores;

·     When there are open excavation and reinstatement works, hoarding of not less than 2.4m high should be provided and properly maintained as far as practicable along the site boundary with provision for public crossing.  Good site practice shall also be adopted by the Contractor to ensure the conditions of the hoardings are properly maintained throughout the construction period;

·     The portion of any road leading only to construction site that is within 30m of a vehicle entrance or exit should be kept clear of dusty materials;

·     Surfaces where any pneumatic or power-driven drilling, cutting, polishing or other mechanical breaking operation takes place should be sprayed with water or a dust suppression chemical continuously;

·     Any area that involves demolition activities should be sprayed with water or a dust suppression chemical immediately prior to, during and immediately after the activities so as to maintain the entire surface wet;

·      Any skip hoist for material transport should be totally enclosed by impervious sheeting;

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

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

·      Exposed earth should be properly treated by compaction, turfing, hydroseeding, vegetation planting or sealing with latex, vinyl, bitumen, shotcrete or other suitable surface stabilizer within six months after the last construction activity on the construction site or part of the construction site where the exposed earth lies.

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction stage

·   APCO

·   To control the dust impact To meet HKAQO and TM-EIA criteria

·   Implemented, deficiency rectified after observation

S4.3.10

D6

Implement regular dust monitoring under EM&A programme during the construction stage.

Monitoring of dust impact

Contractor

Selected rep. dust monitoring station

Construction stage

·   TM-EIA

·   Implemented

Construction Noise (Airborne)

S5.4.1

N1

Implement the following good site practices:

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

·   Machines and plant (such as trucks, cranes) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;

·   Plant known to emit noise strongly in one direction, where possible, be orientated so that the noise is directed away from nearby NSRs;

·   Silencers or mufflers on construction equipment should be properly fitted and maintained during the construction works;

·   Mobile plant should be sited as far away from NSRs as possible and practicable;

·   Material stockpiles, mobile container site office and other structures should be effectively utilized, where practicable, to screen noise from on-site construction activities.

Control construction airborne noise

Contractor

All construction sites

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N2

Install temporary hoarding located on the site boundaries between noisy construction activities and NSRs.  The conditions of hoardings shall be properly maintained throughout the construction period.

Reduce the construction noise levels at low-level zone of NSRs through partial screening

Contractor

All construction sites

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N3

Install movable noise barriers (typical design is wooden framed barrier with a small-cantilevered on a skid footing with 25mm thick internal sound absorptive lining), acoustic mat or full enclosure, screen the noisy plants including air compressors, generators and handheld breakers, etc.

Sreen the noisy plant items to be used at all construction sites

Contractor

All construction sites where practicable

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N4

Use ‘Quiet plant’

Reduce the noise levels of plant items

Contractor

All construction sites where practicable

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N5

Loading/ unloading activities should be carried out inside the full enclosure of mucking out points.

Reduce the noise levels of loading/ unloading activities

Contractor

Mucking out locations

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N6

Sequencing operation of construction plants where practicable.

Operate sequentially within the same work site to reduce the construction airborne noise

Contractor

All construction sites where practicable

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N7

Implement a noise monitoring programme under EM&A programme.

Monitor the construction noise levels at the selected representative locations

Contractor

Selected rep. noise monitoring station

Construction stage

·   TM-EIAO

·   Implemented

Water Quality (Construction Phase)

S6.9.1.1

W1

In accordance with the Practice Note for Professional Persons on Construction Site Drainage, Environmental Protection Department, 1994 (ProPECC PN1/94), construction phase mitigation measures shall include the following:

 

Construction Runoff

·   At the start of site establishment, perimeter cut-off drains to direct off-site water around the site should be constructed with internal drainage works and erosion and sedimentation control facilities implemented.  Channels (both temporary and permanent drainage pipes and culverts), earth bunds or sand bag barriers should be provided on site to direct stormwater to silt removal facilities.  The design of the temporary on-site drainage system will be undertaken by the contractor prior to the commencement of construction;

·   The dikes or embankments for flood protection should be implemented around the boundaries of earthwork areas.  Temporary ditches should be provided to facilitate the runoff discharge into an appropriate watercourse, through a silt/ sediment trap.  The sediment/ silt traps should be incorporated in the permanent drainage channels to enhance deposition rates;

·   The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention time for silt/ sand traps should be 5 minutes under maximum flow conditions.  Sizes may vary depending upon the flow rate, but for a flow rate of 0.1 m3/s a sedimentation basin of 30 m3 would be required and for a flow rate of 0.5 m3/s the basin would be 150 m3.  The detailed design of the sand/ silt traps shall be undertaken by the contractor prior to the commencement of construction;   

·   All exposed earth areas should be completed and vegetated as soon as possible after earthworks have been completed, or alternatively, within 14 days of the cessation of earthworks where practicable.  Exposed slope surfaces should be covered by tarpaulin or other means;

·   The overall slope of the site should be kept to a minimum to reduce the erosive potential of surface water flows, and all traffic areas and access roads protected by coarse stone ballast.  An additional advantage accruing from the use of crushed stone is the positive traction gained during prolonged periods of inclement weather and the reduction of surface sheet flows;

·   All drainage facilities and erosion and sediment control structures should be regularly inspected and maintained to ensure proper and efficient operation at all times and particularly following rainstorms.  Deposited silt and grit should be removed regularly and disposed of by spreading evenly over stable, vegetated areas;

·   Measures should be taken to minimize the ingress of site drainage into excavations.  If the excavation of trenches in wet periods is necessary, they should be dug and backfilled in short sections wherever practicable.  Water pumped out from trenches or foundation excavations should be discharged into storm drains via silt removal facilities;

·   Open stockpiles of construction materials (for example, aggregates, sand and fill material) of more than 50m3 should be covered with tarpaulin or similar fabric during rainstorms.  Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system;

·   Manholes should always be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris being washed into the drainage system and storm runoff being directed into foul sewers;

·   Precautions be taken at any time of year when rainstorms are likely, actions to be taken when a rainstorm is imminent or forecasted, and actions to be taken during or after rainstorms are summarized in Appendix A2 of ProPECC PN 1/94.  Particular attention should be paid to the control of silty surface runoff during storm events, especially for areas located near steep slopes;

·   All vehicles and plant should be cleaned before leaving a construction site to ensure no earth, mud, debris and the like is deposited by them on roads.  An adequately designed and site wheel washing facilities should be provided at every construction site exit where practicable.  Wash-water should have sand and silt settled out and removed at least on a weekly basis to ensure the continued efficiency of the process.  The section of access road leading to, and exiting from, the wheel wash bay to the public road should be paved with sufficient backfall toward the wheel wash bay to prevent vehicle tracking of soil and silty water to public roads and drains;

·   Oil interceptors should be provided in the drainage system downstream of any oil/ fuel pollution sources.  The oil interceptors should be emptied and cleaned regularly to prevent the release of oil and grease into the storm water drainage system after accidental spillage.  A bypass should be provided for the oil interceptors to prevent flushing during heavy rain;

·   Construction solid waste, debris and rubbish on site should be collected, handled and disposed of properly to avoid water quality impacts;

·   All fuel tanks and storage areas should be provided with locks and sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank to prevent spilled fuel oils from reaching water sensitive receivers nearby;

·   Adopt best management practices;

·   All earth works should be conducted sequentially to limit the amount of construction runoff generated from exposed areas during the wet season (April to September) as far as practicable. 

To minimize water quality impact from the construction site runoff and general construction activities

Contractor

All construction sites where practicable

Construction stage

·   Water Pollution Control Ordinance

·   ProPECC PN 1/94

·   TM-EIAO

·   TM-DSS

·   Implemented

S6.9.1.2

W2

Tunneling Works and Underground Works

 

·   Cut-&-cover tunneling work should be conducted sequentially to limit the amount of construction runoff generated from exposed areas during the wet season (April to September) as far as practicable.

·   Uncontaminated discharge should pass through sedimentation tanks prior to off-site discharge;

·   The wastewater with a high concentration of SS should be treated (e.g. by sedimentation tanks with sufficient retention time) before discharge.  Oil interceptors would also be required to remove the oil, lubricants and grease from the wastewater;

·   Direct discharge of the bentonite slurry (as a result of D-wall) is not allowed.  It should be reconditioned and reused wherever practicable.  Temporary storage locations (typically a properly closed warehouse) should be provided on site for any unused bentonite that needs to be transported away after all the related construction activities area completed.  The requirements in ProPECC PN 1/94 should be adhered to in the handling and disposal of bentonite slurries.

To minimize construction water quality impact from tunneling works

Contractor

All tunneling portion

Construction stage

·   Water Pollution Control Ordinance

·   ProPECC PN 1/94

·   TM-DSS

·   TM-EIAO

·   Implemented

S6.9.1.3

W3

Sewage Effluent

 

·    Portable chemical toilets and sewage holding tanks are recommended for handling the construction sewage generated by the workforce.  A licensed contractor should be employed to provide appropriate and adequate portable toilets and be responsible for appropriate disposal and maintenance.

To minimize water quality from sewage effluent

Contractor

All construction sites where practicable

Construction stage

·   Water Pollution Control Ordinance

·   TM-DSS

·   Implemented

S6.9.1.5

W4

Groundwater from Potential Contaminated Area:

 

·    No direct discharge of groundwater from contaminated areas should be adopted.

·    A discharge license under the WPCO through the Regional Office of EPD for groundwater discharge should be applied. Prior to the excavation works within these potentially contaminated areas, the groundwater quality should be reviewed during the process of discharge license application. The compliance to the Technical Memorandum on Standards for Effluents Discharged into Drainage on Sewerage Systems, Inland and Coastal Waters (TM-DSS) and the existence of prohibited substance should be confirmed. If the review results indicated that the groundwater to be generated from the excavation works would be contaminated, the contaminated groundwater should be either properly treated in compliance with the requirements of the TM-DSS or properly recharged into the ground.

·    If wastewater treatment is deployed, the wastewater treatment unit shall deploy suitable treatment process (e.g. oil interceptor / activated carbon) to reduce the pollution level to an acceptable standard and remove any prohibited substances (e.g. TPH) to undetectable range. All treated effluent from wastewater treatment plant shall meet the requirements as stated in TM-DSS and should be discharged into the foul sewers.

·    If groundwater recharging wells are deployed, recharging wells should be installed as appropriate for recharging the contaminated groundwater back into the ground. The recharging wells should be selected at places where the groundwater quality will not be affected by the recharge operation as indicated in the Section 2.3 of TM-DSS. The baseline groundwater quality shall be determined prior to the selection of the recharge wells, and submit a working plan (including the laboratory analytical results showing the quality of groundwater at the proposed recharge location(s) as well as the pollutant levels of groundwater to be recharged) to EPD for agreement. Pollution levels of groundwater to be recharged shall not be higher than pollutant levels of ambient groundwater at the recharge well. Prior to recharge, any prohibited substances such as TPH products should be removed as necessary by installing the petrol interceptor.

To minimize groundwater quality impact from contaminated area

Contractor

Excavation areas where contamination is found

Construction stage

·   Water Pollution Control Ordinance

·   TM-DSS

·   TM-EIAO

·   Implemented

S6.9.1.6

W6

Accidental Spillage

 

In order to prevent accidental spillage of chemicals, the following is recommended:

·        All the tanks, containers, storage area should be bunded and the locations should be locked as far as possible from the sensitive watercourse and stormwater drains;

·        The Contractor should register as a chemical waste producer if chemical wastes would be generated.  Storage of chemical waste arising from the construction activities should be stored with suitable labels and warnings.

Disposal of chemical wastes should be conducted in compliance with the requirements as stated in the Waste Disposal (Chemical Waste) (General) Regulation.

To minimize water quality impact from accidental spillage

Contractor

All construction site where practicable

Construction stage

·   Water Pollution Control Ordinance

·   ProPECC PN 1/94

·   TM-EIAO

·   TM-DSS

·   Implemented

Waste Management (Construction Waste)

S7.4.1

WM1

On-site sorting of C&D material

 

·    Geological assessment should be carried out by competent persons on site during excavation to identify materials which are not suitable to use as aggregate in structural concrete (e.g. volcanic rock, Aplite dyke rock, etc.).  Volcanic rock and Aplite dyke rock should be separated at the source sites as far as practicable and stored at designated stockpile area preventing them from delivering to crushing facilities.  The crushing plant operator should also be reminded to set up measures to prevent unsuitable rock from ending up at concrete batching plants and be turned into concrete for structural use.  Details regarding control measures at source site and crushing facilities should be submitted by the Contractor for the Engineer to review and agree.  In addition, site records should also be kept for the types of rock materials excavated and the traceability of delivery will be ensured with the implementation of Trip Ticket System and enforced by site supervisory staff as stipulated under DEVB TC(W) No. 6/2010 for tracking of the correct delivery to the rock crushing facilities for processing into aggregates.  Alternative disposal option for the reuse of volcanic rock and Aplite Dyke rock, etc. should be explored.

Separation of unsuitable rock from ending up at concrete batching plants and be turned into concrete for structural use

Contractor

All construction sites

Construction stage

·   DEVB (W) No. 6/2010

·   Implemented

S7.5.1

WM2

Construction and Demolition Material

·    Maintain temporary stockpiles and reuse excavated fill material for backfilling and reinstatement;

·    Carry out on-site sorting;

·    Make provisions in the Contract documents to allow and promote the use of recycled aggregates where appropriate;

·    Adopt ‘selective demolition’ technique to demolish the existing structures and facilities with a view to recovering broken concrete effectively for recycling purpose, where possible;

·    Implement a trip-ticket system for each works contract to ensure that the disposal of C&D materials are properly documented and verified; and

·    Implement an enhanced Waste Management Plan similar to ETWBTC (Works) No. 19/2005 – “Environmental Management on Construction Sites” to encourage on-site sorting of C&D materials and to minimize their generation during the course of construction.

Good site practice to minimize the waste generation and recycle the C&D materials as far as practicable so as to reduce the amount for final disposal

Contractor

All construction sites

Construction stage

·   Land (Miscellaneous Provisions) Ordinance

·   Waste Disposal Ordinance

·   ETWB TCW No. 19/2005

·   Implemented

S7.5.1

WM3

C&D Waste

·    Standard formwork or pre-fabrication should be used as far as practicable in order to minimize the arising of C&D materials.  The use of more durable formwork or plastic facing for the construction works should be considered.  Use of wooden hoardings should not be used, as in other projects.  Metal hoarding should be used to enhance the possibility of recycling.  The purchasing of construction materials will be carefully planned in order to avoid over ordering and wastage;

·    The Contractor should recycle as much of the C&D materials as possible on-site. Public fill and C&D waste should be segregated and stored in different containers or skips to enhance reuse or recycling of materials and their proper disposal.  Where practicable, concrete and masonry can be crushed and used as fill.  Steel reinforcement bar can be used by scrap steel mills.  Different areas of the sites should be considered for such segregation and storage.

Good site practice to minimize the waste generation and recycle the C&D materials as far as practicable so as to reduce the amount for final disposal

Contractor

All construction sites

Construction stage

·   Land (Miscellaneous Provisions) Ordinance

·   Waste Disposal Ordinance

·   ETWB TCW No. 19/2005

·   Implemented

S7.5.1

WM5

Land-based Sediment

·    All construction plant and equipment shall be designed and maintained to minimize the risk of silt, sediments, contaminants or other pollutants being released into the water column or deposited in the locations other than designated location;

·    All vessels shall be sized such that adequate draft is maintained between vessels and the sea bed at all states of the tide to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash;

·    Before moving the vessels which are used for transporting dredged material, excess material shall be cleaned from the decks and exposed fittings of vessels and the excess materials shall never be dumped into the sea except at the approved locations;

·    Adequate freeboard shall be maintained on barges to ensure that decks are not washed by wave action.

·    The Contractors shall monitor all vessels transporting material to ensure that no dumping outside the approved location takes place. The Contractor shall keep and produce logs and other records to demonstrate compliance and that journeys are consistent with designated locations and copies of such records shall be submitted to the engineers;

·    The Contractors shall comply with the conditions in the dumping licence.

·    All bottom dumping vessels (Hopper barges) shall be fitted with tight fittings seals to their bottom openings to prevent leakage of material;

·    The material shall be placed into the disposal pit by bottom dumping;

·    Contaminated marine mud shall be transported by spit barge of not less than 750m3 capacity and capable of rapid opening and discharge at the disposal site;

·    Discharge shall be undertaken rapidly and the hoppers shall be closed immediately. Material adhering to the sides of the hopper shall not be washed out of the hopper and the hopper shall remain closed until the barge returns to the disposal site.

·    For Type 3 special disposal treatment, sealing of contaminant with geosynthetic containment before dropping designated mud pit would be a possible arrangement. A geosynthetic containment method is a method whereby the sediments are sealed in geosynthetic containers and, the containers would be dropped into the designated contaminated mud pit where they would be covered by further mud disposal and later by the mud pit capping at the disposal site, thereby fulfilling the requirements for fully confined mud disposal.

To control pollution due to marine sediment

Contractor

Along CKR alignment

Construction stage

·   ETWB TCW No. 34/2002

·   Implemented

S7.5.1

WM6

Chemical Waste

·   Chemical waste that is produced, as defined by Schedule 1 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;

·   Containers used for the storage of chemical wastes should be suitable for the substance they are holding, resistant to corrosion, maintained in a good condition, and securely closed, have a capacity of less than 450 L unless the specification has been approved by EPD, and display a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the regulation;

·   The storage area for chemical wastes should be clearly labelled and used solely for the storage of chemical waste, enclosed on at least 3 sides, have an impermeable floor and bunding of sufficient capacity to accommodate 110% of the volume of the largest container or 20% of the total volume of waste stored in that area, whichever is the greatest, have adequate ventilation, covered to prevent rainfall entering, and arranged so that incompatible materials are adequately separated;

·   Disposal of chemical waste should be via a licensed waste collector, be to a facility licensed to receive chemical waste, such as the Chemical Waste Treatment Centre which also offers a chemical waste collection service and can supply the necessary storage containers, or be to a reuser of the waste, under approval from EPD. 

Control the chemical waste and ensure proper storage, handling and disposal

Contractor

All construction sites

Construction stage

·   Waste Disposal (Chemical Waste) (General) Regulation

·   Code of Practice on the Packaging, Labelling and Storage of Chemical Waste

·   Implemented

S7.5.1

WM7

General Refuse

·   General refuse generated on-site should be stored in enclosed bins or compaction units separately from construction and chemical wastes;

·   A reputable waste collector should be employed by the Contractor to remove general refuse from the site, separately from construction and chemical wastes, on a daily basis to minimize odour, pest and litter impacts.  Burning of refuse on construction sites is prohibited by law.

·   Aluminum cans are often recovered from the waste stream by individual collectors if they are segregated and made easily accessible.  Separate labelled bins for their deposit should be provided if feasible;

·   Office wastes can be reduced through the recycling of paper if volumes are large enough to warrant collection.  Participation in a local collection scheme should be considered by the Contractor.

Minimize production of the general refuse and avoid odour, pest and litter impacts

Contractor

All construction sites

Construction stage

·   Waste Disposal Ordinance

·   Implemented

Land Contamination

 

S8.9 & Appendix 8.4

LC2

Excavation of the Contaminated Soil

·   Prior to commencement of the excavation works at the contamination zone, the zone should be clearly marked out on site and the surface levels recorded. Excavation of contaminated material should be undertaken using dedicated earth-moving plant.

·   The excavated contaminated soils would be stockpiled at designated area on site and covered by sheet to prevent dispersion of contamination during stockpiling.

·   The Contractor should pay attention to the selection of suitable groundwater lowering schemes and discharge points if the groundwater table is higher than the contaminated soils during excavation. The Contractor should also obtain a valid Water Pollution Control Ordinance (WPCO) discharge licence from EPD where applicable.

The contaminated soil will be

excavated for on-site reuse

Contractor

PBH4

Prior to commencement of construction works within the contaminated area

·   Practice Guide  (PG) for Investigation and Remediation of Contaminated Land

·   Guidance Notes for Contaminated Land Assessment and Remediation

·   Guidance Manual for Use of Risk-Based Remediation Goals (RBRGs) for Contaminated Land Management

·   Implemented

S8.9 & Appendix 8.4

LC3

·   Following completion of the excavation to the specified depth, at least one sample from the base of the excavation and four samples evenly distributed along the boundary of the excavation shall be taken for a closure assessment testing.  The acceptance criterion is shown below:

 

Locations

Testing requirement

Acceptance Criteria

PBH4

PCBs

RBRGs (Public Park)

 

·   If the results of analysis below the RBRGs (Public Park), no further excavation will be required.

 

If the analysis indicates presence of contamination (i.e. noncompliance of the acceptance criteria), further excavation shall be carried out in 0.5m increment vertically and/or horizontally depending on the location(s) of the sample(s) which has exceeded the acceptance criteria. Further sampling shall also be conducted for compliance testing. The process of excavation,

sampling and compliance testing should continue until all contaminated materials are removed and should be supervised by a Land Contamination Specialist.

·   Implemented

Appendix 8.4

LC4

A Remediation Report (RR) to demonstrate adequate clean-up shall be prepared and submitted to EPD for endorsement prior to the commencement of any construction/development works within the sites. No construction/development works shall be carried out prior to the endorsement of the RR by EPD.

·   Implemented

Hazard to Life

S9.18

H1

Blasting activities regarding transport and use of explosives should be supervised and audited by competent site staff to ensure full compliance with the blasting permit conditions.

To ensure that the risks from the proposed explosives handling and transport would be acceptable

Contractor

Works areas at which explosives would be used

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.6, para.4

H2

Detonators shall not be transported in the same vehicle with other Category 1 Dangerous Goods.

To reduce the risk of explosion during the transport of cartridged emulsion

Contractor

-

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.6, para.8

H3

The explosives delivery trucks should be approved by Mines Division and should meet the regulatory requirements for transport of explosives.

To comply with the requirements for approval of an explosives delivery vehicle

Contractor

-

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.10, para.7 and S9.18

H4

Blast cover should be provided for shaft at HMT, and kept closed during blasting.