Contract No: HK/2011/07

 

Wanchai Development Phase II and Central Wanchai Bypass

Sampling, Field Measurement and Testing Work (Stage 2)

 

Environmental Permit no. EP-122/2002/D

 

Quarterly Environmental Monitoring
and Audit Report

 

- May 2015 to JULY 2015 -
 

 

CLIENTS:

PREPARED BY:

 

 

Civil Engineering and Development

Department

 

 

Lam Geotechnics Limited

 

11/F Centre Point

181-185 Gloucester Road,

Wanchai, H.K.

 

Telephone: (852) 2882-3939

Facsimile: (852) 2882-3331

E-mail: info@lamenviro.com

Website: http://www.lamenviro.com

 

 

 

 

 

CHECKED by:



 

 

 

 

 

Raymond Dai

Environmental Team Leader

 

 

 

DATE:

 

 

31 August 2015


Table of contents

 

EXECUTIVE SUMMARY.. 4

1. Introduction.. 6

1.1 Scope of the Report 7

1.2 Structure of the Report 7

2. Project Background.. 8

2.1 Background. 8

2.2 Scope of the Project and Site Description.. 8

2.3 Project Organization and Contact Personnel 9

2.4 Principal Work and Activities. 11

3. Monitoring Requirements.. 12

3.1. Noise Monitoring. 12

3.2. Air Monitoring. 13

3.3. Water Quality Monitoring. 14

4. Monitoring Results.. 18

4.1. Noise Monitoring Results. 18

4.2. Air Monitoring Results. 19

4.3. Water Monitoring Results. 20

4.4. Waste Monitoring Results. 22

5. Compliance Audit.. 20

5.1. Noise Monitoring. 25

5.2. Air Monitoring. 25

5.3. Water Quality Monitoring. 25

5.4. Site Audit 26

5.5. Review of the Reasons for and the Implications of Non-compliance. 26

5.6. Summary of action taken in the event of and follow-up on non-compliance. 26

6. Complaints, Notification of Summons and Prosecution.. 27

7. Cumulative Construction Impact due to the Concurrent Projects 29

8. Conclusion.. 30


lIST OF TABLES

 

Table 1.1 Principal Work Activities in the reporting period for Contractor no. HK/2012/08

Table 1.2 Principal Work Activities in the reporting period for Contractor no. HY/2009/18

Table 2.1 Schedule 2 Designated Projects under this Project

Table 2.2 Contact Details of Key Personnel

Table 2.3 Principal Work Activities in the reporting period for Contracor no. HK/2012/08

Table 2.4 Principal Work Activities in the reporting period for Contracor no. HY/2009/18

Table 3.1 Continuous Noise Monitoring Stations

Table 3.2 Air Monitoring Stations

Table 3.3 Water Quality Monitoring Stations

Table 3.4 Marine Water Quality Monitoring Frequency and Parameters

Table 4.1 Continuous Noise Monitoring Stations for Contract no. HK/2012/08 and HY/2009/18

Table 4.2 Air Monitoring Station for Contract no. HK/2012/08

Table 4.3 Air Monitoring Station for Contract no. HY/2009/18

Table 4.4 Water Quality Monitoring Station for Contract no. HK/2012/08

Table 4.5 Summary of Water Quality Monitoring Exceedance in the reporting period

Table 4.6 Details of Waste Disposal for Contract no. HK/2012/08

Table 4.7 Details of Waste Disposal for Contract no. HY/2009/18

Table 6.1 Cumulative Statistics on Complaints

Table 6.2 Cumulative Statistics on Successful Prosecutions

 


lIST OF FIGUREs

 

Figure 2.1 Project Layout

Figure 2.2 Project Organization Chart

Figure 3.1 Locations of Environmental Monitoring Stations

 

 

lIST OF APPENDIces

 

Appendix 2.1 Environmental Mitigation Implementation Schedule

Appendix 3.1 Action and Limit Level

Appendix 4.1 Noise Monitoring Graphical Presentations

Appendix 4.2 Air Quality Monitoring Graphical Presentations

Appendix 4.3 Water Quality Monitoring Graphical Presentations

Appendix 5.1 Event Action Plans

Appendix 6.1 Complaint Log

Appendix 8.1 Construction Programme of Individual Contracts

 

 

 

 

 

EXECUTIVE SUMMARY

  1. This is the Quarterly Environmental Monitoring and Audit (EM&A) Report May 2015 to July 2015 specific for Environmental Permit no. EP-122/2002/D. The EM&A report is prepared by the Environmental Team (ET) employed under Contract No. HK/2011/07 Wan Chai Development Phase II and Central Wanchai Bypass Sampling, Field Measurement and Testing Works (Stage 2). This report presents the environmental monitoring and audit findings and information during the period from 1st May 2015 to 31st July 2015.

Construction Activities for the Reported Period

  1. During this reporting period, the principle work activities of the contracts are included as follows:

Contract no. HK/2012/08 Wan Chai Development Phase II Central- Wan Chai Bypass at Wan Chai West

Table 1.1 Principal Work Activities in the reporting period for Contract no. HK/2012/08

May 2015

June 2015

July 2015

  Removal of L-shaped wall

  Installation of caisson seawall

  Removal of L-shaped wall

  Installation of caisson seawall

  Construction of ELS

  Construction of ELS

  Installation of pipe pile wall

  Roadworks

  Drainage works

 

Contract no. HY/2009/18 Central- Wan Chai Bypass (CWB) Central Interchange

Table 1.2 Principal Work Activities in the reporting period for Contractor no. HY/2009/18

July 2015

  P1 Road Paving

Noise Monitoring

  1. Continuous noise monitoring was conducted at ACL3 City Hall.
  2. No action or limit level exceedance was recorded in the May 2015 reporting period.
  3. No action or limit level exceedance was recorded in the June 2015 reporting period.
  4. Limit level exceedances were recorded at ACL3 City hall on 6 July 2015 during daytime in the reporting period. After the investigation, the exceedances were concluded as non-project related.
  5. Due to safety concerned, the location of the continuous noise monitoring station at City Hall was finely adjusted to the roof of the City Hall, Low Block on 1 May 2013.

 

Air Quality Monitoring

  1. No action or limit level exceedance was recorded in the May, June and July 2015 reporting period.
  2. Due to the defective electricity supply found at monitoring station ACL1 and the advice from City Hall Building Management, the air monitoring station ACL1 City Hall was finely adjusted on 28 Feb 2014 to an alternate electricity supply.
  3. 1-hour and 24-hour Total Suspended Particulates (TSP) monitoring were conducted at ACL1 City Hall and ACL2 PLA Barracks (ACL2a Contractor HK/2012/08 Site Office since 7 December 2013) on every six days basis.
  4. Due to the large scale renovation works at Peoples Liberation Army Headquarter, a Proposal for Relocation of Air Quality Monitoring Station at Peoples Liberation Army Headquarter (ACL2) was formally submitted to EPD on 4th November, 2013.
  5. Air Quality Monitoring at ACL2 was temporarily suspended during the period from 14th November, 2013 to 3rd December, 2013.
  6. The Proposal for Relocation of Air Quality Monitoring Station at Peoples Liberation Army Headquarter (ACL2) was approved by EPD on 27 November 2013.
  7. According to the approved proposal for relocation of Air Quality Monitoring station, the action and limit levels of ACL2a shall adopt the reference monitoring result from the baseline air quality monitoring report for EP/364/2009 in 22 April 2010 in which approved by EPD.
  8. The air quality monitoring at ACL2a Contractor HK/2012/08 Site Office was commenced on 7 December 2013.

Water Quality Monitoring

  1. As confirmed by WDII RSS, the dredging works, seawall modification works and other associated works undertaken at Central Reclamation Phase III by Contractor HK/2012/08 was commenced in late September 2014. According to the approved EM&A manual under EP-122/2002/D, water quality monitoring shall be implemented at the Central Reclamation Phase III works area accordingly to assess any potential water quality impact during the construction period.
  2. Water quality monitoring at M5B and Culvert J were conducted three days per weeks during the reporting period starting from 26 September 2014.

xviii.        One action level exceedance of dissolved oxygen was recorded on 4 May 2015 during ebb tide and one limit level exceedance of suspended solids was recorded on 15 May 2015 during flood tide in the May 2015 reporting period. After the investigation the exceedance was recorded as non-project related.

xix.        Six action level exceedances of dissolved oxygen were recorded on 1, 8, 10, 19, 22 June 2015 during ebb tide and 12 June 2015 during flood tide. One limit exceedance of dissolved oxygen was recorded on 22 June 2015 during flood tide in the June 2015 reporting month. After the investigation, the exceedances were recorded as non-project related.

  xx.        No action or limit level exceedance was recorded in the July 2015 reporting period.

Complaints, Notifications of Summons and Successful Prosecutions

  1. One environmental complaint was received in the July 2015 reporting period
  2. A public complaint (EPD Ref.: H05/RS/00016215-15 dated 03 July 2015) regarding dark smoke emission referred by EPD was received by ET on 03 July 2015.

According to the relevant site records under Contract HK/2012/08, one derrick barge (Chang Sheng 306) in yellow color was conducting material transfer at a near shore location opposite to Fleet Arcade on 30 June 2015 around noon-time under HK/2012/08 and the concerned derrick barge was towed away for maintenance on the same date.

Follow-up inspection was conducted during weekly environmental inspection on 7 July 2015, no dark smoke was observed from the concerned derrick barge (Chang Sheng 306). Nevertheless, the Contractor was reminded to conduct regular checking on the condition of the all derrick barges deployed on site to ensure only well maintained equipment are used to avoid potential dark smoke emission affecting nearby public.

Based on the review on relevant record and follow up site inspection, the condition of the concerned derrick barge was considered generally in order and no dark smoke was observed. In view of the public concern, the Contractor was reminded to conduct regular checking on the condition of derrick barges deployed on site to ensure only well maintained equipment are used on site to avoid potential dark smoke emission affecting nearby public.

 

1. Introduction

1.1          Scope of the Report

1.1.1.     Lam Geotechnics Limited (LGL) has been appointed to work as the Environmental Team (ET) under Environmental Permit no. EP-122/2002/D to implement the Environmental Monitoring and Audit (EM&A) programme as stipulated in the EM&A Manual of the approved Environmental Impact Assessment (EIA) Report Central Reclamation Phase III - Studies, Site Investigation, Design and Construction (Register No.: AEIAR-040/2001) since 1 May 2013.

1.1.2.     This report documents the finding of EM&A works for Environmental Permit (EP) no. EP-122/2002/D, during the period from 1st May 2015 to 31st July 2015.

1.2          Structure of the Report

Section 1 Introduction details the scope and structure of the report.

 

Section 2 Project Background summarizes background and scope of the project, site description, project organization and contact details of key personnel during the reporting period.

 

Section 3 Monitoring Requirements summarizes all monitoring parameters, monitoring locations, monitoring frequency, duration and action plan.

 

Section 4 Monitoring Results summarizes the monitoring results obtained in the reporting period.

 

Section 5 Compliance Audit summarizes the auditing of monitoring results, all exceedances environmental parameters.

 

Section 6 Complaints, Notification of summons and Prosecution summarizes the cumulative statistics on complaints, notification of summons and prosecution

 

Section 7 Cumulative Construction Impact due to the Concurrent Projects summarizes the relevant cumulative construction impact due to the concurrent activities of the concurrent Projects.

 

Section 8 Conclusion

2. Project Background

2.1          Background

2.1.1       Central Reclamation Phase III - Studies, Site Investigation, Design and Construction (hereafter called the Project) are Designated Project (DP) under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO). The Environmental Impact Assessment (EIA) Reports for Central Reclamation Phase III - Studies, Site Investigation, Design and Construction (Register No. AEIAR-040/2001) has been approved on 31 August 2001.

2.2          Scope of the Project and Site Description

2.2.1.     The design and construction of Central Reclamation Phase III involves the permanent reclamation and construction and operation of a trunk road and its road tunnel that is shown at Figure 2.1.

2.2.2.     The key purpose of the study area encompasses the area of Victoria Harbour to the southeast of the new Outlying Islands Ferry Piers and north of Edinburgh Place and Lung Wui Road. The area extends eastward to Fenwick Pier Street and the Fleet Arcade, and includes the existing GPO, Star Ferry Piers, Queens Pier, City Hall, PLA Headquarters, Hong Kong Red Cross Headquarters building and the Tamar Site. The scope of the Central Reclamation, Phase III includes:

          Reclamation and seawalls, roads and associated services, North Island Line Protection Works and Advance Trunk Road Tunnel (ATRT) for the CWB;

          Reprovisioning of Star Ferry Pier, public landing steps, wallah wallah moorings, and motor boat/launch operators' kiosks;

          External cooling water systems which consist of the cooling water pumping shells for future developments, and the reprovisioning of existing cooling water pumping stations and associated pipework systems and E&M works;

          Reprovisioning of existing Leisure and Cultural Services Department (LCSD)'s facilities;

          Provision of a flood relief path, stormwater culvert extensions, upgrading of hinterland stormwater drainage resulting from the reclamation, demolition of the existing waterfront structures and necessary landscaping;

          The Hong Kong Station Extended Overrun Tunnel (EOT) and associated ventilation structures entrusted for construction within the CRIII works;

          Reprovisioning of the Government Heliport at the Wan Chai PCWA and reprovisioning of the Wan Chai PCWA at Chai Wan Basin.

 

2.2.3.     The project also contains various Schedule 2 DPs that, under the EIAO, require Environmental Permits (EPs) to be granted by the DEP before they may be either constructed or operated. Table 2.1 summarises the four individual DPs under this Project. Figure 2.1 shows the locations of these Schedule 2 DPs.

Table 2.1 Schedule 2 Designated Projects under this Project

Item

Designated Project

EIAO Reference

DP1

Reclamation works

Schedule 2, Part I, A.7

DP2

Road P2 and other roads which are classified as primary/district distributor roads

Schedule 2, Part I, A.1

DP3

Central-Wanchai bypass (CWB)

Schedule 2, Part I, C.1

DP4

The North Island Line (NIL) Protection Works within CRIII

Schedule 2, Part I, A.7

 

2.2.4.     The designated project work I (DP1) was awarded to China State-Leader Joint Venture HK/2012/08 as part of the Project works by the Civil Engineering and Development Department (CEDD). The construction work under Contract no. HK/2012/08 was commenced on 27 May 2013.

2.3          Project Organization and Contact Personnel

2.3.1       Civil Engineering and Development Department is the overall project controllers for the Central Reclamation Phase III Project. For the construction phase of the Project, Project Engineer, Contractor(s), Environmental Team and Independent Environmental Checker are appointed to manage and control environmental issues.

 

2.3.2       The proposed project organization and lines of communication with respect to environmental protection works are shown in Figure 2.2. Key personnel and contact particulars are summarized in Table 2.2:

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 2.2 Contact Details of Key Personnel

Party

Role

Post

Name

Contact No.

Contact Fax

AECOM

Engineers Representative for WDII

Principal Resident Engineer

Mr. Frankie Fan

2587 1778

2587 1877

Engineers Representative for CWB

Principal Resident Engineer

Mr. Peter Poon

3922 3388

3912 3010

China State- Leader JV

Contractor under Contract no. HK/2012/08

Project Director

C. N. LAI

9106 5806

2877 1522

Project Manager

Mr. Eddie Chung

9189 8118

Site Agent

Mr. Keith Tse

9095 7922

Environmental Officer

Mr. James Ma

9130 9549

Environmental Supervisor

Mr. Y. L. Ho

9856 5669

Leighton Contractor (Asia) Limited

Contractor under Contractor no. HY/2009/18

Site Agent

Mr. Jimmy Chu

3973 0931

2140 6799

Deputy Site Agent

Mr. Bob Yeung

3973 0931

Environmental Office

Ms. Lighting Chan

3973 0850

Environmental Supervisor

Ms. Christy So

3973 1065

Environmental Supervisor

Mr. Ray Cheng

3973 0917

RAMBOLL ENVIRON Hong Kong Limited

Independent Environmental Checker (IEC)

Independent Environmental Checker (IEC)

Mr. David Yeung

3465 2888

3465 2899

Lam Geotechnics Limited

(For Enquiry)

Environmental Team (ET)

Environmental Team Leader (ETL)

Mr. Raymond Dai

2882 3939

2882 3331

 

2.4          Principal Work and Activities

2.4.1       During this reporting period, the principle work activities of the contracts are included as follows:
Contract no. HK/2012/08 Wan Chai Development Phase II Central- Wan Chai Bypass at Wan Chai West

Table 2.3 Principal Work Activities in the reporting period for HK/2012/08

May 2015

June 2015

July 2015

  Removal of L-shaped wall

  Installation of caisson seawall

  Removal of L-shaped wall

  Installation of caisson seawall

  Construction of ELS

  Construction of ELS

  Installation of pipe pile wall

  Roadworks

  Drainage works

 

Contract no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

Table 2.4 Principal Work Activities in the reporting period for HY/2009/18

July 2015

  P1 Road Paving

 

2.4.2       Implementation status of the recommended mitigation measures during this reporting period is presented in Appendix 2.1.

3. Monitoring Requirements

3.1.          Noise Monitoring

NOISE Monitoring Stations

3.1.1.     The continuous noise monitoring station for the Project is listed and shown in Table 3.1 and Figure 3.1. Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.1 Continuous Noise Monitoring Stations

District

Station

Description

Central

ACL3

City Hall

 

Noise Monitoring Parameters, Frequency and Duration

3.1.2.     Continuous 24-hour noise monitoring shall be carried out at the designated monitoring stations. The following is an initial guide on the regular monitoring frequency for each station on a 24 hours daily basis when noise generating activities are underway:

          One set of measurements between 0700 and 1900 hours on normal weekdays.

          One set of measurements between 1900 and 2300 hours on normal weekdays and 0700 and 2300 hours on public holidays.

          One set of measurements between 2300 and 0700 hours on next day on everyday.

3.1.3.     If construction works are extended to include works during the hours of 1900 0700 as well as public holidays and Sundays, additional weekly impact monitoring shall be carried out during respective restricted hours periods. Applicable permits under NCO shall be obtained by the Contractor.

Monitoring Equipment

3.1.4.     As referred to in the Technical Memorandum issued under the NCO, sound level meters in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications shall be used for carrying out the noise monitoring. Immediately prior to and following each noise measurement the accuracy of the sound level meter shall be checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements may be accepted as valid only if the calibration level from before and after the noise measurement agrees to within 1.0 dB.

3.1.5.     Noise measurements shall not be made in fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

3.1.6.     The sound level meter shall be checked using an acoustic calibrator generating a known sound pressure level at a known frequency before deployment to the site and during each site visit. Measurements will be accepted as valid only if the calibration level from before and after the noise measurement agrees to within 1.0 dB.

3.2.          Air Quality Monitoring

Air Quality Monitoring Stations

3.2.1.     The air quality monitoring stations for the Project are listed and shown in Table 3.2 and Figure 3.1. Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.2 Air Quality Monitoring Stations

Station ID

Monitoring Location

ACL1

City Hall

ACL2a

Contractor HK/2012/08 Site Office


Air Quality Monitoring Parameters, Frequency and Duration

3.2.2.     One-hour and 24-hour TSP levels should be measured to indicate the impacts of construction dust on air quality. The 24-hour TSP levels shall be measured by following the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B.

3.2.3.     All relevant data including temperature, pressure, weather conditions, elapsed-time meter reading for the start and stop of the sampler, identification and weight of the filter paper, and any other local atmospheric factors affecting or affected by site conditions, etc., shall be recorded down in detail.

3.2.4.     For regular impact monitoring, the sampling frequency of at least once in every six-days, shall be strictly observed at all the monitoring stations for 24-hour TSP monitoring. For 1-hour TSP monitoring, the sampling frequency of at least three times in every six-days should be undertaken when the highest dust impact occurs.

Sampling Procedure and Monitoring Equipment

3.2.5.     High volume samplers (HVSs) in compliance with the following specifications shall be used for carrying out the 1-hour and 24-hour TSP monitoring:

          0.6 1.7 m3 per minute adjustable flow range;

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

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

          Capable of providing a minimum exposed area of 406 cm2;

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

          Equipped with a shelter to protect the filter and sampler;

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

          Equipped with a flow recorder for continuous monitoring;

          Provided with a peaked roof inlet;

          Incorporated with a manometer;

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

          Easily changeable filter; and

          Capable of operating continuously for a 24-hour period.

3.2.6.     Initial calibration of dust monitoring equipment shall be conducted upon installation and thereafter at bi-monthly intervals. The transfer standard shall be traceable to the internationally recognized primary standard and be calibrated annually. The concern parties such as IEC shall properly document the calibration data for future reference. All the data should be converted into standard temperature and pressure condition.

Laboratory Measurement / Analysis

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

3.2.8.     Filter paper of size 8 x 10 shall be labelled before sampling. It shall be a clean filter paper with no pinholes, and shall be conditioned in a humidity-controlled chamber for over 24-hours and be pre-weighed before use for the sampling.

3.2.9.     After sampling, the filter paper loaded with dust shall be kept in a clean and tightly sealed plastic bag. The filter paper shall then be returned to the laboratory for reconditioning in the humidity controlled chamber followed by accurate weighing by an electronic balance with readout down to 0.1 mg. The balance shall be regularly calibrated against a traceable standard.

3.2.10.   All the collected samples shall be kept in a good condition for 6 months before disposal.

3.3.                Water Quality Monitoring

WATER Quality Monitoring Stations

3.3.1       The water quality monitoring stations for the Project are listed and shown in Table 3.3 and Figure 3.1. Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.3 Water Quality Monitoring Stations

Station ID

Description

Easting

Northing

Cooling Water Intakes

M5B

Swire / Government Headquarters/ Tamar Development/ MTRCL and HSBC Headquarters

835169

816052

Culverts (Reference Station)

Culvert J

Culvert J Outfall Location

835082

816071

 

Water Quality Parameters

3.3.2       Monitoring of dissolved oxygen (DO), turbidity and suspended solids (SS) shall be carried out at WSD flushing water intakes and cooling water intakes. DO and Turbidity are measured in-situ while SS is determined in laboratory.

3.3.3       In association with the water quality parameters, other relevant data shall also be measured, such as monitoring location/position, time, sampling depth, water temperature, pH, salinity, dissolved oxygen (DO) saturation, weather conditions, sea conditions, tidal stage, and any special phenomena and work underway at the construction site etc.

 

Sampling Procedures and Monitoring Equipment

3.3.4       The interval between two sets of monitoring should not be less than 36 hours except where there are exceedances of Action and/or Limit Levels, in which case the monitoring frequency will be increased. Table 3.4 shows the proposed monitoring frequency and water quality parameters. Duplicate in-situ measurements and water sampling should be carried out in each sampling event. For selection of tides for in-situ measurement and water sampling, tidal range of individual flood and ebb tides should be not less than 0.5m.

Table 3.4 Marine Water Quality Monitoring Frequency and Parameters

Activities

Monitoring Frequency1

Parameters2

During the 4-week baseline monitoring period

Three days per week, at mid-flood and mid-ebb tides

Turbidity, Suspended Solids (SS), Dissolved Oxygen (DO), pH, Temperature, Salinity

During marine construction works

Three days per week, at mid-flood and mid-ebb tides

Turbidity, Suspended Solids (SS), Dissolved Oxygen (DO), pH, Temperature, Salinity

After completion of marine construction works

Three days per week, at mid-flood and mid-ebb tides

Turbidity, Suspended Solids (SS), Dissolved Oxygen (DO), pH, Temperature, Salinity

Notes:

1.     For selection of tides for in-situ measurement and water sampling, tidal range of individual flood and ebb tides should be not less than 0.5m.

2.     Turbidity should be measured in situ whereas SS should be determined by laboratory.

Dissolved Oxygen and Temperature Measuring Equipment

3.3.5       The instrument should be a portable, weatherproof dissolved oxygen measuring instrument complete with cable, sensor, comprehensive operation manuals, and use a DC power source. It should be capable of measuring:

          a dissolved oxygen level in the range of 0-20 mg/l and 0-200% saturation

          a temperature of 0-45 degree Celsius

3.3.6       It should have a membrane electrode with automatic temperature compensation complete with a cable. Sufficient stocks of spare electrodes and cables should be available for replacement where necessary. (e.g. YSI model 59 meter, YSI 5739 probe, YSI 5795A submersible stirrer with reel and cable or an approved similar instrument).

3.3.7       Should salinity compensation not be build-in in the DO equipment, in-situ salinity shall be measured to calibrate the DO equipment prior to each DO measurement.

Turbidity Measurement Instrument

3.3.8       The instrument should be a portable, weatherproof turbidity-measuring instrument complete with comprehensive operation manual. The equipment should use a DC power source. It should have a photoelectric sensor capable of measuring turbidity between 0‑1000 NTU (e.g. Hach model 2100P or an approved similar instrument).

Sampler

3.3.9       A water sampler comprises a transparent PVC cylinder, with a capacity of not less than 2 litres, and can be effectively sealed with latex cups at both ends. The sampler should have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth (e.g. Kahlsico Water Sampler or an approved similar instrument).

Sample Container and Storage

3.3.10    Water samples for suspended solids measurement should be collected in high-density polythene bottles, packed in ice (cooled to 4蚓 without being frozen), and delivered to ALS Technichem (HK) Pty Ltd. as soon as possible after collection for analysis.

Water Depth Detector

3.3.11    A portable, battery-operated echo sounder shall be used for the determination of water depth at each designated monitoring station. This unit can either be handheld or affixed to the bottom of the workboat, if the same vessel is to be used throughout the monitoring programme.

Salinity

3.3.12    A portable salinometer capable of measuring salinity in the range of 0-40 ppt shall be provided for measuring salinity of the water at each of monitoring location.

 

Monitoring Position Equipment

3.3.13    A hand-held or boat-fixed type digital Global Positioning System (GPS) with waypoint bearing indication or other equivalent instrument of similar accuracy shall be provided and used during monitoring to ensure the monitoring vessel is at the correct location before taking measurements.

Calibration of In-situ Instruments

3.3.14    All in-situ monitoring instrument shall be checked, calibrated and certified by a laboratory accredited under HOKLAS or equivalent before use, and subsequently re-calibrated at 3 monthly intervals throughout all stages of the water quality monitoring. Responses of sensors and electrodes should be checked with certified standard solutions before each use. Wet bulb calibration for a DO meter shall be carried out before measurement at each monitoring location.

3.3.15    For the on site calibration of field equipment by the ET, the BS 127:1993, "Guide to Field and on-site test methods for the analysis of waters" should be observed.

3.3.16    Sufficient stocks of spare parts should be maintained for replacements when necessary. Backup monitoring equipment shall also be made available so that monitoring can proceed uninterrupted even when some equipment is under maintenance, calibration, etc.

 

Laboratory Measurement / Analysis

3.3.17    Analysis of suspended solids has been carried out in a HOKLAS accredited laboratory, ALS Technichem (HK) Pty Ltd. Water samples of about 1L shall be collected at the monitoring stations for carrying out the laboratory SS determination. The SS determination work shall start within 24 hours after collection of the water samples. The SS determination shall follow APHA 19ed or equivalent methods subject to the approval of IEC and EPD.

 

4. Monitoring Results

4.0.1.     The environmental monitoring will be implemented based on the division of works areas of each designed project managed under different contracts with separate FEP applied by individual contractors. Overall layout showing work areas of various contracts, latest status of work commencement and monitoring stations is shown in Figure 2.1 and Figure 3.1. The monitoring results are presented in according to the Individual Contract(s).

4.0.2.     In the reporting period, the concurrent contracts are:

Ÿ  Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West.

Ÿ  Contractor no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

  4.1.       Noise Monitoring Results

4.1.1       Due to safety concerned, the location of the continuous noise monitoring station at City Hall was finely adjusted to the roof of the City Hall, Low Block on 1 May 2013.

Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West and Contractor no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

4.1.2       The proposed division of noise monitoring station is summarized in Table 4.1 below.

Table 4.1 Continuous Noise Monitoring Station for Contract no. HK/2012/08 and Contract no. HY/2009/18

Location ID

District

Description

ACL3

Central

City Hall

Remarks: Continuous noise monitoring results and graphical presentation for ACL3 during restricted hours and night time period are for information only.

4.1.3       No action or limit level exceedance was recorded in the May 2015 reporting period.

4.1.4       No action or limit level exceedance was recorded in the June 2015 reporting period

4.1.5       Limit level exceedances were recorded in the July 2015 at ACL3 City Hall on 6 July 2015 during daytime in the reporting period. After checking with Contractor of HK/2012/08, land based bored piling and excavation opposite to Citic Tower was conducted during the concerned period. After checking with Contractor of HY/2009/18, only road paving works was conducted during the concerned period. In view of the above construction works and the location of the works undertaken, the exceedance was considered to be non-project related and contributed by nearby public events opposite to the monitoring stations.

4.1.6       Continuous noise monitoring results measured in this reporting period are reviewed and summarized. Details of continuous noise monitoring results and graphical presentation can be referred to Appendix 4.1

  4.2.       Air Quality Monitoring Results

4.2.1       1-hour and 24-hour Total Suspended Particulates (TSP) monitoring were conducted at ACL1 City Hall and ACL2 PLA Barracks (ACL2a Contractor HK/2012/08 Site Office since 7 December 2013) on every six days basis.

4.2.2       Due to the large scale renovation works at Peoples Liberation Army Headquarter, a Proposal for Relocation of Air Quality Monitoring Station at Peoples Liberation Army Headquarter (ACL2) was formally submitted to EPD on 4th November, 2013.

4.2.3       Air Quality Monitoring at ACL2 was temporarily suspended during the period from 14th November, 2013 to 3rd December, 2013.

4.2.4       The Proposal for Relocation of Air Quality Monitoring Station at Peoples Liberation Army Headquarter (ACL2) was approved by EPD on 27 November 2013.

4.2.5       According to the approved proposal for relocation of Air Quality Monitoring station, the action and limit levels of ACL2a shall adopt the reference monitoring result from the baseline air monitoring report for EP/364/2009 in 22 April 2010 in which approved by EPD.

4.2.6       The air quality monitoring at ACL2a Contractor HK/2012/08 Site Office was commenced on 7 December 2013.

Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West

4.2.7       The proposed division of air quality monitoring stations are summarized in Table 4.2 below.

Table 4.2 Air Quality Monitoring Stations for Contract no. HK/2012/08

Station

Description

ACL1

City Hall

ACL2a

Contractor HK/2012/08 Site Office

4.2.8       No action or limit level exceedance was recorded in the May, June and July 2015.

4.2.9       The air quality monitoring results measured in this reporting period are reviewed and summarized. Details of air monitoring results and graphical presentation can be referred in Appendix 4.2.

Contractor no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

4.2.10    The proposed division of air quality monitoring station is summarized in Table 4.3 below.

Table 4.3 Air Quality Monitoring Station for Contract no. HY/2009/18

Station

Description

ACL1

City Hall

4.2.11    No action or limit level exceedance was recorded in the July 2015 reporting period.

4.2.12    The air quality monitoring results measured in this reporting period are reviewed and summarized. Details of air monitoring results and graphical presentation can be referred in Appendix 4.2.

  4.3.       Water Quality Monitoring Results

4.3.1       The proposed division of water quality monitoring stations are summarized in Table 4.4 below.

Table 4.4 Water Quality Monitoring Station for Contract no. HK/2012/08

Station ID

Description

Cooling Water Intakes

 

M5B

Swire / Government Headquarters/ Tamar Development/ MTRCL

and HSBC Headquarters

Culverts (Reference Station)

 

Culvert J

Culvert J Outfall Location

4.3.2       Water quality monitoring results measured in this reporting period are reviewed and summarized. Detail of water quality monitoring results and graphical presentation can be referred in Table 4.5 and Appendix 4.3

4.3.3       Water quality monitoring at M5B and Culvert J were conducted three days per week during reporting period starting form 26 September 2014.

4.3.4       One action level exceedance of dissolved oxygen was recorded on 4 May 2015 during ebb tide and one limit level exceedance of suspended solids was recorded on 15 May 2015 during flood tide in the May 2015 reporting period. After the investigation, the exceedances were concluded as non-project related.

4.3.5       After checking with contractor, transfer of rockfill from derrick barge to land was conducted under Contract HK/2012/08 on 4 May 2015. Contractor mitigation measures including the use of silt curtain was in place and silt curtain installed around intake monitoring station was generally in order and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related.

4.3.6       After checking with contractor, placing of rockfill was conducted under Contract HK/2012/08 on the 15 May 2015. Contractor mitigation measures including the use of silt curtain was generally in place and silt curtain installed around intake monitoring station was generally in order. In view of the above and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related. Nevertheless, the contractor of HK/2012/08 was reminded to maintain the minimal opening of the silt curtain for marine access and implement localize mitigation measure as appropriate.

4.3.7       Six action level exceedances of dissolved oxygen were recorded on 1, 8, 10, 19 and 22 June 2015 during ebb tide and 12 June 2015 during flood tide. One limit level exceedance of dissolved oxygen was recorded on 22 June 2015 during flood tide in the June 2015 reporting period. After the investigation, the exceedances were concluded as non-project related.

4.3.8       After checking with contractor, placing of rockfill was conducted under Contract HK/2012/08 on 1 June 2015. Contractor mitigation measures including the use of silt curtain was in place and silt curtain installed around intake monitoring station was generally in order while nearby culvert discharge was consistently observed. In view of above and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related.

4.3.9       After checking with contractor, slope trimming was conducted under Contract HK/2012/08 on 8 June 2015. Contractor mitigation measures including the use of silt curtain was in place and silt curtain installed around intake monitoring station was generally in order while nearby culvert discharge was consistently observed. In view of the above and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related.

4.3.10    After checking with contractor, placing of rockfill was conducted under Contract HK/2012/08 on 10 June 2015. Contractor mitigation measures including the use of silt curtain was in place and silt curtain installed around intake monitoring station was generally in order while nearby culvert discharge was consistently observed. In view of above and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related.

4.3.11    After checking with contractor, no marine work was conducted under Contract HK/2012/08 on 12 and 19 June 2015. Silt curtain installed around intake monitoring station was generally in order while nearby culvert discharge was consistently observed. In view of no marine activity was conducted and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedances were not project related.

4.3.12    After checking with contractor placing of geotextile was conducted under Contract HK/2012/08 on 22 June 2015 during flood tide. Contractor mitigation measures including the use of silt curtain was in place and silt curtain installed around intake monitoring station was generally in order while nearby culvert discharge was consistently observed. In view of above and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related.

4.3.13    After checking with contractor placing of geotextile was conducted under Contract HK/2012/08 on 22 June 2015 during ebb tide. Contractor mitigation measures including the use of silt curtain was in place and silt curtain installed around intake monitoring station was generally in order while nearby culvert discharge was consistently observed. In view of above and no further exceedance was recorded in subsequent monitoring, it was considered that the exceedance was not project related.

4.3.14    No action or limit level exceedance was recorded in the July 2015 reporting period

Table 4.5 Summary of Water Quality Monitoring Exceedance in Reporting Period

Contract No.

Water quality monitoring station

Mid-flood

Mid-ebb

DO

SS

DO

SS

AL

LL

AL

LL

AL

LL

AL

LL

HK/2012/08

M5B2

1

1

0

1

6

0

0

0

Culvert J1

-

-

-

-

-

-

-

-

Total

1

1

0

1

6

0

0

0

Remarks1: Action or limit level are not applicable to reference station Culvert J.

Remarks2: Turbidity measurement are reported as reference.

 

  4.4.       Waste Monitoring Results

Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West

4.4.1       Inert and Non-inert C&D wastes were disposed in this reporting period. Details of the waste flow table are summarized in Table 4.6

Table 4.6 Details of Waste Disposal for Contract no. HK/2012/08

Waste Type

Quantity this quarter

Cumulative Quantity-to-Date

Disposal / Dumping Grounds

Inert C&D materials disposed, m3

826

9317

1320

34825

TM38

TKO137

Inert C&D materials recycled, m3

NIL

NIL

NIL

Non-inert C&D materials disposed, m3

95

865

SENT Landfill

Non-inert C&D materials recycled, m3

NIL

NIL

NIL

Chemical waste disposed, kg

NIL

NIL

NIL

Remark: Contractor was justified the inert materials and non-inert C&D disposed cumulative quantity of August 2014 from 4529m3 to 6013m3 and 305m3 to 350m3 respectivel


Contractor no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

4.4.2       Inert and Non-inert C&D wastes were disposed in this reporting period. Details of the waste flow table are summarized in Table 4.7

Table 4.7 Details of Waste Disposal for Contract no. HY/2009/18

Waste Type

Quantity this quarter

Cumulative Quantity-to-Date

Disposal / Dumping Grounds

Inert C&D materials disposed, m3

NIL

NIL

NIL

Inert C&D materials recycled, m3

NIL

NIL

NIL

Non-inert C&D materials disposed, m3

NIL

NIL

NIL

Non-inert C&D materials recycled, m3

NIL

NIL

NIL

Chemical waste disposed, kg

NIL

NIL

NIL

 

5.      Compliance Audit

5.0.1.     The Event Action Plan for construction noise and air quality are presented in Appendix 5.1.

5.1.          Noise Monitoring

Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West

5.1.1       No action or limit level exceedance was recorded in the May 2015 reporting period.

5.1.2       No action or limit level exceedance was recorded in the June 2015 reporting period.

5.1.3       Limit level exceedances were recorded at ACL3 City Hall on 6 July 2015 during daytime in the July 2015 reporting period. After the investigation, the exceedances were concluded as non-project related.

Contractor no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

5.1.4       Limit level exceedances were recorded at ACL3 City Hall on 6 July 2015 during daytime in the July 2015 reporting period. After the investigation, the exceedances were concluded as non-project related.

5.2.          Air Quality Monitoring

Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West

5.2.1       No action or limit level exceedance was recorded at ACL1 City Hall and ACL2a Contractor HK/2012/08 Site Office in May, June and July 2015 reporting period.

Contractor no. HY/2009/18 Central Wan Chai Bypass (CWB) Central Interchange

5.2.2       No action or limit level exceedance was recorded at ACL1 City Hall and ACL2a Contractor HK/2012/08 Site Office in July 2015 reporting period.

5.3.          Water Quality Monitoring

Contract no. HK/2012/08 Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai West

5.3.1       One action level exceedance of dissolved oxygen was recorded on 4 May 2015 during ebb tide and one limit level exceedance of suspended solids was recorded on 15 May 2015 during flood tide in the May 2015 reporting period. After the investigation, the exceedances were concluded as non-project related.

5.3.2       Six action level exceedances of dissolved oxygen were recorded on 1, 8, 10, 19 and 22 June 2015 during ebb tide and 12 June 2015 during flood tide. One limit level exceedance of dissolved oxygen was recorded on 22 June 2015 during flood tide in the June 2015 reporting period. After the investigation, the exceedances were concluded as non-project related.

5.3.3       No action or limit level exceedance was recorded in the July 2015 reporting period.

5.4.          Site Audit

5.4.1       There was no non-compliance from the site audits in the reporting period. During environmental site inspections conducted during the reporting period, minor deficiencies were noted.

5.5.          Review of the Reasons for and the Implications of Non-compliance

5.5.1       There was no non-compliance from the site audits in the reporting period.

5.6.          Summary of action taken in the event of and follow-up on non-compliance

5.6.1       There was no particular action taken since no project-related non-compliance was recorded from the site audits and environmental monitoring in the reporting period.

6.      Complaints, Notification of Summons and Prosecution

6.0.1.     One environmental complaint was received in the July 2015 reporting period

6.0.2.     A public complaint (EPD Ref.: H05/RS/00016215-15 dated 03 July 2015) regarding dark smoke emission referred by EPD was received by ET on 03 July 2015.

According to the relevant site records under Contract HK/2012/08, one derrick barge (Chang Sheng 306) in yellow color was conducting material transfer at a near shore location opposite to Fleet Arcade on 30 June 2015 around noon-time under HK/2012/08 and the concerned derrick barge was towed away for maintenance on the same date.

Follow-up inspection was conducted during weekly environmental inspection on 7 July 2015, no dark smoke was observed from the concerned derrick barge (Chang Sheng 306). Nevertheless, the Contractor was reminded to conduct regular checking on the condition of the all derrick barges deployed on site to ensure only well maintained equipment are used to avoid potential dark smoke emission affecting nearby public.

Based on the review on relevant record and follow up site inspection, the condition of the concerned derrick barge was considered generally in order and no dark smoke was observed. In view of the public concern, the Contractor was reminded to conduct regular checking on the condition of derrick barges deployed on site to ensure only well maintained equipment are used on site to avoid potential dark smoke emission affecting nearby public.

6.0.3.     The details of cumulative complaint log and summary of complaints are presented in Appendix 6.1.

6.0.4.     No notification of summons or prosecution was received in the reporting period. Cumulative statistic on complaints and successful prosecutions are summarized in Table 6.1 and Table 6.2 respectively.

 

Table 6.1 Cumulative Statistics on Complaints

Reporting Period

No. of Complaints

Commencement works to last reporting quarter

1

May 2015 July 2015

1

Project-to-Date

2

 

 

Table 6.2 Cumulative Statistics on Successful Prosecutions

Environmental Parameters

Cumulative No. Brought Forward

No. of Successful Prosecutions this quarter (Offence Date)

Cumulative No. Project-to-Date

Air

-

0

0

Noise

-

0

0

Water

-

0

0

Waste

-

0

0

Total

-

0

0

 

 

7. Cumulative Construction Impact due to the Concurrent Projects

7.0.1.     This section addresses the relevant cumulative construction impact due to the concurrent activities of the current projects including the Central Reclamation Phase III (CRIII), Wan Chai Development Phase II (WDII), Central-WanChai Bypass (CWB), Island Eastern Corridor Link projects (IECL) and Wan Chai Development Phase II Central Wan Chai Bypass at Wan Chai East (CWB Tunnel).

7.0.2.     According to the Final EM&A report of Central Reclamation Phase III (CRIII) for Contract HK 12/02, the major construction activities were completed by end of January 2014 and no construction activities were undertaken thereafter and the water quality monitoring was completed in October 2011. As such, it is considered that there were no cumulative construction impact due to the concurrent activities of the current projects with the Central Reclamation Phase III (CRIII) undertaken by contractor HK12/02 in the reporting month.

7.0.3.     According to the construction programme of Wan Chai Development Phase II, Central-Wan Chai Bypass and Island Eastern Corridor Link projects, the major construction activities under Wan Chai Development Phase II were tunnel works, ELS works and culvert construction at Wan Chai East and removal of L-shape wall, D-wall construction and ELS works at Wan Chai West. The major construction activities under Central-Wan Chai Bypass and Island Eastern Corridor Link Projects were bridge construction and road works at Central Interchange, ELS works at Ex-PCWAW, ELS works and bowling green office demolition at Victoria Park, D- wall construction and ELS works at TS3, IEC demolition and tunnel works at North Point area in the reporting month.

7.0.4.     The major environmental impacts generated from tunnel works at Central and tunnel works at Wan Chai East, IECL and Causeway Bay Typhoon Shelter were undertaken in the reporting period. With mitigation measures, no significant air impact from construction activities was anticipated in the reporting period. Besides, no project-related exceedances were recorded during the water, air and noise environmental monitoring events in the reporting period. Thus, it is evaluated that the cumulative construction impact from the concurrent projects including Wan Chai Development Phase II was insignificant.

8. Conclusion

8.0.1.     The EM&A programme was carried out in accordance with the EM&A Manual requirements, minor alterations to the programme proposed were made in response to changing circumstances.

8.0.2.     No non-compliances were noted and no prosecutions were received during the reporting period.

8.0.3.     Mitigation measures according to the environmental mitigation implementation schedule and the EIA were generally implemented by the Contractor in this reporting period. Environmental site audit was conducted by the Environmental Team and the Independent Environmental Checker and no cumulative environmental impact was identified in the reporting period. Hence, the EM&A programme was considered effective and shall be maintained

8.0.4.     The construction programmes of individual contracts are provided in Appendix 8.1.