APPENDICES

Appendix A            Site Map and Works Area

Appendix B            Organization Chart

Appendix C            Works Programme

Appendix D            Implementation Status of Environmental Mitigation Measures

Appendix E            Monitoring Locations

Appendix F             Monitoring Results

Appendix G            Interim Notifications of Environmental Quality Limits Exceedances

Appendix H            Complaint Log

 

TABLES

Table 3-1      Frequency of Air Quality, Noise and Water Quality Monitoring

Table 3-2      Air Quality Monitoring Locations

Table 3-3      Noise Monitoring Locations

Table 3-4      Water Quality Monitoring Locations

Table 3-5      Action & Limit Levels for Air Quality

Table 3-6      Action & Limit Levels for Air Borne Noise

Table 3-7      Action & Limit Levels for Ground Borne Noise

Table 3-8      Action & Limit Levels for Water Quality

Table 3-9      Summary of Air Quality Monitoring Results

Table 3-10    Summary of Impact Air Borne Noise Monitoring Results

Table 3-11    Summary of Impact Ground Borne Noise Monitoring Results

Table 3-12    Summary of Impact Water Quality Monitoring Results

Table 3-13    Summary of Impact Marine Water Quality Monitoring Results

Table 4-1      Waste Generated from April to June 2011

Table 4-2      Summary of Project- related Exceedances

Table 5-1      Cumulative Statistics of Environmental Complaints

Table 6-1      Cumulative Statistics of Notification of Summons and Successful Prosecutions

Table 7-1      Total Wastes Generated from April to June 2011

 

Executive Summary

1      This quarterly EM&A summary report under the Main Contract for the Design and Construction of Tsuen Wan Drainage Tunnel (hereafter referred to as the “Project”) to Maeda-CREC-SELI Joint Venture (MCSJV), which summarises the findings of environmental impact monitoring works during the period from April to June 2011.

2      Air borne noise monitoring was performed at five monitoring stations (NSR1, NSR3, NSR6, NSR8 and NSR9) and ground borne noise monitoring was performed at one monitoring station (NSR 6).  Air quality monitoring was carried out at four monitoring stations (ASR1, ASR3, ASR8 and ASR9).  Water quality monitoring was carried out at four monitoring stations (Intake I-1, Intake I-2, Intake I-3 and Outfall O-1). Noise level was measured in terms of Leq, L10 and L90 (30min).  Air quality was measured in terms of 1-hour Total Suspended Particulates (TSP). Water quality was measured in terms of Temperature, pH, Dissolved Oxygen (DO), Turbidity (Tby) and Suspended Solid (SS).

3      Details of all monitoring stations are summarized in the table below.

Type of Monitoring

Monitoring Station ID

Name of Premises

Status of Monitoring Works during the Reporting Period

Air Quality Monitoring

ASR1

Sik Sik Yuen Ho Fung College

Ongoing

ASR3

Hong Hoi Chee Hong Temple

Ongoing

ASR8

Beach Tower (Long Beach Gardens)

Ongoing

ASR9

Greenview Terrace (Block 1)

Ongoing

Air Borne Noise Monitoring

NSR1

Sik Sik Yuen Ho Fung College

Ongoing

NSR3

Hong Hoi Chee Hong Temple

Ongoing

NSR6

Squatters

Ongoing

NSR8

Beach Tower (Long Beach Gardens)

Ongoing

NSR9

Greenview Terrace (Block 1)

Ongoing

Ground Borne Noise Monitoring

NSR3

Hong Hoi Chee Hong Temple

To be commenced in early August 2011 (Tentative)

NSR6

Squatters

Commenced on 1 March 2011 and completed on 14 April 2011

Water Quality Monitoring

I-1

Intake I-1

Ongoing

I-2

Intake I-2

Ongoing

I-3

Intake I-3

Ongoing

O-1

Outfall O-1

Ongoing

 

4      The major construction activities undertaken by the Contractor during the period from April to June  2011 include site cleaning and tidying at Outfall, I-1, I-2 and I-3; drilling, excavation and rock splitting at spiral ramp at Outfall; tunnel boring machine (TBM) drilling of the tunnel and mucking out of tunnel spoil at Outfall; removal of existing retaining wall and hanging support for existing utilities at fast lane of Castle Peak Road (CPR) at Outfall; excavation and soil nailing for box culvert construction at fast lane of CPR east bound at Outfall; excavation and disposal of excavated material from existing arch bridge underneath CPR at Outfall; placing levelling stone and bagged concrete to formation of sea wall at Portion E; installation of precast sea wall blocks at Portion E; backfilling rockfill and type II armour behind the seawall blocks at Portion E; disposal of the excavated soil under the arch bridge to TM38 at Portion E; relocation of type II armour rocks behind the seawall blocks at Portion E; cascade and channel modification concrete structure works at I-1; construction of horizontal pipe pile (pipe roofing) for TBM break-through at I-1; pre-bored H-pile construction for vehicular access at I-1; drilling, excavation and rock splitting of man access shaft and vortex drop shaft at I-2; pipe jacking at Portion G at I-2; pre-bored H-pile construction for skin wall at Portion G at I-2; construction of approach channel structure at I-2; construction of 750 step channel and catchpit at Portion G at I-2; construction of drainage works at Portion G at I-2; preparation works for blasting at I-2; drilling, rock splitting and excavation of vortex shaft at I-3; construction of PB wall structure skin wall and copping beam at I-3; construction of boulder traps at I-3; installation of concrete blocks for temporary bund wall at I-3; tree establishment works of the transplanted trees at I-3; backfilling for PB Wall, removal of piling platform and slope reinstatement at I-3; and construction of base slab for approach channel at I-3.

 

5      As recommended in the EIA report, no TBM operation was undertaken during restricted hours from chainage 3308 m to 3143 m.

6      No project related exceedance of air quality and water quality monitoring was recorded. No exceedance of noise limit level was recorded, but EPD receives one complaint on construction noise which triggers the exceedance of noise action level. The below table summarizes the exceedances of air quality, noise and water quality in the reporting period.

 Parameter

Action Level Exceedance

Limit Level Exceedance

Air

Nil

Nil

Air Borne Noise

One complaint  received on 30 Jun 2011 at NSR 6

Nil

Ground Borne Noise

Nil

Nil

DO

Four records on 7 May, 18 May and 20 Jun 2011 at O-1(FT)

Ten records on 20 May, 27 May, 30 May, 3 Jun, 7 Jun, 17 Jun and 20 Jun 2011 at O-1(ET)

Nineteen records on 7 May, 13 May, 18 May, 30 May, 7 Jun, 11 Jun, 13 Jun, 15 Jun, 17 Jun, 20 Jun, 27 Jun and 29 Jun at O-1(FT)

Nineteen records on 7 May, 13 May, 20 May, 1 Jun, 9 Jun, 11 Jun, 15 Jun, 17 Jun, 20 Jun, 24 Jun, 27 Jun and 29 Jun 2011 at O-1(ET)

Turbidity

One record on 22 Jun 2011 at I-1

One record on 17 Jun 2011 at I-1

Two records on 17 Jun and 22 Jun 2011 at I-2

Three records on 13 May, 17 Jun and 22 June at I-3

SS

Four records on 8 Apr, 18 Apr, 9 Jun and 17 Jun 2011 at I-1

Four records on 8 Apr, 11 Apr, 13 Apr and 3 May 2011 at O-1(FT)

One record on 18 May 2011 at O-1(ET)

 

One record on 6 Apr 2011 at I-1

Three records on 13 May, 17 Jun and 22 Jun 2011 at I-2

Two records on 13 May and 17 Jun 2011 at I-3

One record on 27 May 2011 at O-1(FT)

Three records on 20 May, 11 Jun and 27 Jun 2011 at O-1(ET)

 

7      Waste figures during the reporting period are summarized in the table below.

Status of Waste Management

Quantity

Inert C&D Material Disposed of to Public Fill at Tuen Mun (m3)

12,268.2

Inert C&D Material Reused in this Contract (m3)

773.5

Inert C&D Material Reused in other Contract* (m3)

53,664.2

Metals Generated (kg)

Nil

Paper / Cardboard Packaging (kg)

350.0

Plastics (kg)

Nil

Chemical Waste (kg)

6,153.4

General Waste Disposed of to NENT Landfill (m3)

120.9

*  Other Contracts include DC/2007/08, YL/2009/01, HY/2007/10,HY/2008/09,  Wo Shang Wai, DC/2007/17, CV/2009/14, Tailor Recycle Aggregate, XRL 823A and 823B, XRL 825, TW 7 and CUHK.

 

8      During the reporting period, one environmental complaint was received. EPD informed ET on 8 July 2011 that one public complaint regarding construction dust and daytime construction noise from the Intake I-3 construction site was received on 30 June 2011. The ET conducted site investigations at Intake I-3 construction site on 8 and 20 July 2011 to review and audit the site setting, mitigation measures implemented on-site, and the environmental performance of the Contractor. Noise monitoring at NSR 6 was increased to twice per week from 11 July to 30 July 2011 according to the requirement of EM&A Manual.  An investigation report was submitted to EPD in August 2011. The issue of complaint was considered closed.  The noise monitoring results would be reported in the Monthly EM&A Report of July 2011.

9      No Notification of Summons was received since the commencement of the Project.

1                     Introduction

1.1.1                The Drainage Services Department (DSD) proposes to construct a tunnel of an internal diameter of 6.5m and length 5.13km, with the purpose to alleviate the flooding risk in Tsuen Wan and Kwai Chung.

1.1.2                This project is a Designated Project under Schedule 2 Part I Category Q, of the Environmental Impact Assessment Ordinance (EIAO) as part of the proposed Tsuen Wan Drainage Tunnel (TWDT) passes underneath the existing Tai Mo Shan Country Park.  An Environmental Impact Assessment (EIA) Study has therefore been undertaken to provide information on the nature and extent of environmental impacts arising from the construction and operation of the proposed designed project and related activities taking place concurrently.  From the EIA the recommendations for monitoring contained herein, are made.

1.1.3                The Maeda-CREC-SELI Joint Venture (MCSJV) was awarded by DSD with the Contract – Design and Construction of Tsuen Wan Drainage Tunnel.

1.1.4                Hyder was commissioned by the MCSJV as the ET to implement an EM&A program in accordance with the EM&A Manual.  The proposed tunnel section flows from the junction of Shing Mun Road and Wo Yi Hop Road and discharges to south of Yau Kom Tau underneath Castle Peak Road as shown in Appendix A.

1.1.5                The construction works of the Project commenced in January 2008. This is the thirteenth quarterly EM&A report summarising the impact monitoring results and audit findings of the EM&A program during the reporting period between April and June 2011.

2                     Project Information

2.1               Project Organization and Management Structure

2.1.1                The organization chart and lines of communication with respect to the on-site environmental management are shown in Appendix B.

2.2               Construction Progress

2.2.1                It is anticipated that the overall project programme from the detail design to completion of all civil works shall take approximately 54 months.  The construction programme is presented in Appendix C.

2.2.2                The major construction activities undertaken in the reporting quarter are: 

l  Site cleaning and tidying at Outfall, I-1, I-2 and I-3;

l  Drilling, excavation and rock splitting at spiral ramp at Outfall;

l  Tunnel boring machine (TBM) drilling of the tunnel and mucking out of tunnel spoil at Outfall;

l  Removal of existing retaining wall and hanging support for existing utilities at fast lane of Castle Peak Road (CPR) at Outfall;

l  Excavation and soil nailing for box culvert construction at fast lane of CPR east bound at Outfall;

l  Excavation and disposal of excavated material from existing arch bridge underneath CPR at Outfall;

l  Placing levelling stone and bagged concrete to formation of sea wall at Portion E;

l  Installation of precast sea wall blocks at Portion E;

l  Backfilling rockfill and type II armour behind the seawall blocks at Portion E;

l  Disposal of the excavated soil under the arch bridge to TM38 at Portion E;

l  Relocation of type II armour rocks behind the seawall blocks at Portion E;

l  Cascade and channel modification concrete structure works at I-1;

l  Construction of horizontal pipe pile (pipe roofing) for TBM break-through at I-1;

l  Pre-bored H-pile construction for vehicular access at I-1;

l  Drilling, excavation and rock splitting of man access shaft and vortex drop shaft at I-2;

l  Pipe jacking at Portion G at I-2;

l  Pre-bored H-pile construction for skin wall at Portion G at I-2;

l  Construction of approach channel structure at I-2;

l  Construction of 750 step channel and catchpit at Portion G at I-2;

l  Construction of drainage works at Portion G at I-2;

l  Preparation works for blasting at I-2;

l  Drilling, rock splitting and excavation of vortex shaft at I-3;

l  Construction of PB wall structure skin wall and copping beam at I-3;

l  Construction of boulder traps at I-3;

l  Installation of concrete blocks for temporary bund wall at I-3;

l  Tree establishment works of the transplanted trees at I-3;

l  Backfilling for PB Wall, removal of piling platform and slope reinstatement at I-3; and

l  Construction of base slab for approach channel at I-3.

2.3               Mitigation Measures

2.3.1                The environmental mitigation measures that were implemented and their statuses are given in Appendix D.

 

3                     EM&A Requirement

3.1               General

3.1.1                The EM&A requirements are stipulated in the EM&A Manual.  The principal purposes of the EM&A program are to assess the compliance with applicable environmental legislation and associated regulations, to ensure the implementation of mitigation measures specified in the EM&A Manual, and to identify any remedial works necessary for redressing any unacceptable or unanticipated environmental impacts.

3.2               EM&A on Air Quality; Noise and Water Quality

Monitoring Parameters

3.2.1                The air quality, noise and water quality monitoring frequencies and parameters are shown in Table 3-1.

Type of Monitoring

Monitoring Station ID

Parameter

Frequency

Air Quality Monitoring

ASR1; ASR3; ASR8 and ASR9

1-hour TSP (mg/m3)

Once every 6 days

Air Borne Noise Monitoring

NSR1; NSR3; NSR6; NSR8 and NSR9

Leq (30 min.)

Once every week

Ground Borne Noise Monitoring

 NSR3 and NSR6

Leq (30 min.)

Once every week

Water Quality Monitoring

I-1; I-1-C; I-2; I-2-C; I-3; I-3-C,

O-1(FT),  O-1-C(FT), O-1(ET) and O-1-C(ET)

DO (mg/L)

Three days per week

SS (mg/L)

Turbidity (NTU)

pH

Temperature (oC)

Table 3-1         Frequency of Air Quality, Noise and Water Quality Monitoring

3.3               Monitoring Locations

3.3.1                The monitoring locations for air quality, noise and water quality are shown in Tables 3-2, 3-3, 3-4 and Appendix E.

Monitoring Station ID

Name of Premises

Floor Level

ASR1

Sik Sik Yuen Ho Fung College

G/F

ASR3

Hong Hoi Chee Hong Temple

Podium

ASR8

Beach Tower (Long Beach Gardens)

G/F

ASR9

Greenview Terrace (Block 1)

G/F

Table 3-2         Air Quality Monitoring Locations

Monitoring Station ID

Name of Premises

Floor Level

NSR1

Sik Sik Yuen Ho Fung College

G/F

NSR3

Hong Hoi Chee Hong Temple

Podium

NSR6

Squatters

G/F

NSR8

Beach Tower (Long Beach Gardens)

G/F

NSR9

Greenview Terrace (Block 1)

Podium (up to 6 July 2009)

Roof* (from 16 July 2009)

* The noise monitoring location of NSR9 had been adjusted at rooftop from 16 July 2009.

* Air borne noise monitoring is conducted at all stations.

* Ground borne noise monitoring is conducted at NSR3 and NSR6 only under the requirements stated in the approved EIA Report.

Table 3-3         Noise Monitoring Locations

Monitoring Station ID

Name of Premises

I-1

Intake I-1

I-1-C

Control of Intake I-1

I-2

Intake I-2

I-2-C

Control of Intake I-2

I-3

Intake I-3

I-3-C^

Control of Intake I-3

O-1 (FT) & (ET)

Outfall 1During Flood Tide and Ebb Tide

O-1-C (FT)#

Control of Outfall O-1 During Flood Tide

O-1-C (ET)#

Control of Outfall O-1 During Ebb Tide

Note:   #Note that there are two control stations for Outfall O-1; one for sampling during flood tide and one for sampling during ebb tide.  Only one of those control stations for Outfall O-1 was sampled during each sampling.  Control station to be sampled was determined according to the tidal information provided by the Hong Kong Observatory.

^ The upper stream location (I-3-C^) had been relocated from the end of February 2009 due to coarse stone blockage.

Table 3-4         Water Quality Monitoring Locations

3.4               Performance Limits (AL Levels)

3.4.1                In accordance with the EM&A Manual, the appropriate Action and Limit Levels for air quality, air borne noise, ground borne noise and water quality were established. They are presented in Table 3-5, Table 3-6, Table 3-7 and Table 3-8.  Should non-compliance of the air quality, noise and water quality criteria occur, actions in accordance with the Event / Action Plan stipulated in contract specific EM&A Manual should be carried out.

Station

1-hr TSP Level in μg/m3

Action Level

Limit Level

ASR1

307

500

ASR3

327

500

ASR8

337

500

ASR9

329

500

Table 3-5         Action & Limit Levels for Air Quality

Time Period

Action

Limit

0700 – 1900 hrs on normal weekdays

When one documented complaint is received

75 dB(A)*

*           For educational establishments the limit level shall be 70 dB(A) and reduced to 65 dB(A) during examination periods between 0700-1900 hours on normal weekdays.

Table 3-6         Action & Limit Levels for Air Borne Noise

Monitoring Station ID

NSR 3

NSR 6

Name of Premises

Hong Hoi Chee
Hong Temple

Squatters

Action Level

When one documented complaint is received

Limit Level

Working days during daytime (0700-1900 hours) (Leq(30min))

65 dB(A)

65 dB(A)

Table 3-7         Action & Limit Levels for Ground Borne Noise

Parameters

Action

Limit

DO in mg/L

(Surface; Middle & Bottom)

Surface & Middle

5%-ile of baseline data for surface and middle layer.

 

Bottom

5%-ile of baseline data for bottom layer.

Surface & Middle

4 mg/L, except 5 mg/L for Fish Culture Zone (FCZ) or

1%-ile of baseline data for surface and middle layer

Bottom

2 mg/L or 1%-ile of baseline data for bottom layer

SS in mg/L

(Depth-averaged)

95%-ile of baseline data or 120% of upstream control station’s SS at the same tide of the same day

99%-ile of baseline or 130% of upstream control station’s SS at the same tide of the same day and specific sensitive receiver water quality requirements (e.g. required suspended solids levels for concerned sea water intakes)

Turbidity (Tby) in NTU (Depth-averaged)

95%-ile of baseline data or 120% of upstream control station’s Tby at the same tide of the same day

99%-ile of baseline or 130% of upstream control station’s Tby at the same tide of the same day

Notes:

·         For DO, non-compliance of the water quality limits occurs when monitoring result is lower than the limits.

·         For SS and Tby, non-compliance of the water quality limits occurs when monitoring result is higher than the limits.

·         All the figures given in the table are used for reference only and the EPD may amend the figures whenever necessary.

Table 3-8         Action & Limit Levels for Water Quality

3.5               Monitoring Result

3.5.1                All measured air quality monitoring levels were complying with the Action and Limit Levels in the reporting period. A summary of air quality monitoring results is presented in Table 3-9 and Appendix F.

Monitoring Station

1-hour TSP (mg/m3)

Action Level

Limit Level

Range

(mg/m3)

(mg/m3)

ASR1

55.5

-

223.4

307

500

ASR3

64.9

-

231.1

327

500

ASR8

46.0

-

278.7

337

500

ASR9

42.6

-

301.0

329

500

Italic indicates the exceedances of Action Levels

Bold indicates the exceedances of Limit Levels

Table 3-9         Summary of Air Quality Monitoring Results

3.5.2                All measured noise monitoring levels were complying with Limit Levels in the reporting period. However, EPD received one public complaint on 30 June 2011 regarding construction dust and daytime construction noise from the Intake I-3 construction site, which triggered the exceedance of action level of air borne noise during the monitoring period.  The ET conducted site investigations at Intake I-3 construction site on 8 and 20 July 2011 to review and audit the site setting, mitigation measures implemented on-site and the environmental performance of the Contractor.  Noise monitoring at NSR 6 was increased to twice per week from 11 July to 30 July 2011 according to the requirement of EM&A Manual.  An investigation report was submitted to EPD in August 2011.  The issue of complaint was considered closed.  The noise monitoring results would be reported in the Monthly EM&A Report of July 2011.

3.5.3                A summary of noise monitoring results is presented in Table 3-10 and Appendix F.

Monitoring Station

Leq (30mins) dB(A)

Limit Level

Range

dB(A)

NSR1

62

-

66

65 / 70

NSR3

61

-

70

75

NSR6

58

-

70

75

NSR8

64

-

73

75

NSR9

66

-

74

75

Bold indicates the exceedances of Limit Levels

Table 3-10       Summary of Impact Air Borne Noise Monitoring Results

3.5.4                All measured ground borne noise monitoring levels were complying with Limit Levels in the reporting period. A summary of noise monitoring results is presented in Table 3-11 and Appendix F.

Monitoring Station

Leq (30mins) dB(A)

Limit Level

Chainage of TBM Covered during the reporting period

(m)

Range

dB(A)

NSR6

43.9

-

46.5

65

 2991 - 3189

Bold indicates the exceedances of Limit Levels

Table 3-11       Summary of Impact Ground Borne Noise Monitoring Results

3.5.5                A summary of water quality monitoring results is presented in Table 3-12 and Appendix F.

3.5.6                None of exceedance related to project construction activities was recorded during reporting quarter but a total of 78 non-project related exceedances were recorded.

River Water Quality Monitoring

3.5.7                A total of 3 non-project related exceedances were recorded in April 2011 including:

l One exceedance of SS action level was recorded at I-1 on 8 April 2011. The measured SS level (9.45 mg/L) was above the baseline action level, but lower than the SS level of the control station (I-1-C) (10.00 mg/L). General site cleaning, rebar fixing at cascade bay 3, formwork preparing, removal of masonry wall, pipe roof corning drilling and geotechnical instrumentation monitoring were undertaken during the measurement. No direct disturbance was observed from the site. Thus, the exceedance was considered to be contributed by high SS level of the upstream location and natural variation. Therefore, no action was required.

l One exceedance of SS action level was recorded at I-1 on 18 April 2011. The measured SS level (2.70 mg/L) was below the baseline action level, but higher than 120% of SS level of the control station (I-1-C) (2.10 mg/L). General site cleaning, formwork at Cascade Bay 3 and 4, construction of H-pile platform, pipe roof drilling and geotechnical instrumentation monitoring were undertaken during the measurement. No direct disturbance was observed from the site. Thus, the exceedance was considered to be contributed by natural variation and no action was required.

l One exceedance of SS limit level was recorded at I-1 on 6 April 2011. The measured SS level (10.95 mg/L) was above the baseline limit level, but lower than 120% of SS level of the control station (I-1-C) (10.60 mg/L). General site cleaning, rebar fixing at cascade bay 1, dismantling of formwork at vehicle access, removal of hoarding and masonry wall and geotechnical instrumentation monitoring were undertaken during the measurement. No direct disturbance was observed from the site. Thus, the exceedance was considered to be contributed by high SS level at upstream location and natural variation. Therefore, no action was required.

3.5.8                A total of 3 non-project related exceedances were recorded in May 2011 including:

l One exceedance of turbidity limit level was recorded at I-3 on 13 May 2011. The measured turbidity level (19.08 NTU) was higher than baseline limit level, but lower than the turbidity level of the control station (I-3-C)(19.19 NTU). General site cleaning and housekeeping, monitoring of deformation monitoring point (DMP), drilling and rock breaking in shaft, installation of concrete blocks in shaft, digging trail pit and breaking of blinding layer at PB wall were undertaken during measurement. No direct disturbance was observed from the site and about 33.5 mm rainfall was recorded on the same day. The exceedance was considered to be contributed by high turbidity level at upstream location and rainfall. Since the exceedance was non-projected related, no further action was required.

l One exceedance of SS limit level was recorded at I-2 on 13 May 2011. The measured SS level (6.30 mg/L) was lower than baseline action level, but higher than 130% of the SS level of the control station (I-2-C)(4.10 mg/L). General site cleaning, housekeeping and temporary traffic arrangement, rock splitting and mucking at vortex drop shaft, drilling holes for rock splitting, construction of H-pile and excavation for pipe jacking at Portion G were undertaken during measurement. No direct disturbance was observed from the site and about 33.5 mm rainfall was recorded on the same day. The exceedance was considered to be contributed by natural variation and high rainfall. Since the exceedance was non-projected related, no further action was required.

l One exceedance of SS limit level was recorded at I-3 on 13 May 2011. The measured SS level (21.50 mg/L) was higher than baseline limit level, but lower than the SS level of the control station (I-3-C)(22.15 mg/L). General site cleaning and housekeeping, monitoring of deformation monitoring point (DMP), drilling and rock breaking in shaft, installation of concrete blocks in shaft, digging trail pit and breaking of blinding layer at PB wall were undertaken during measurement. No direct disturbance was observed from the site and about 33.5 mm rainfall was recorded on the same day. The exceedance was considered to be contributed by high SS level at upstream location and rainfall. Since the exceedance was non-projected related, no further action was required.

3.5.9                A total of 11 non-project related exceedances were recorded in June 2011 including:

l One exceedance of turbidity action level was recorded at I-1 on 22 June 2011. The measured turbidity level (10.57 NTU) was higher than the baseline action level and slightly higher than the turbidity level of the control station (I-1-C) (10.56 NTU). General site cleaning, dismantling formwork at Bay 5, 6 and 7, removal of H-pile platform, formwork at cascade bay 8, temporary traffic arrangement (TTA) at Shing Mun Road, and geotechnical instrumentation monitoring were undertaken during measurement. No direct disturbance was observed from the site. The exceedance was considered to be contributed by high turbidity level at upstream location and heavy rainfall. Since the exceedance was non-project related, no further action was required.

l One exceedance of turbidity limit level was recorded at I-1 on 17 June 2011. The measured turbidity level (14.79 NTU) was higher than the baseline limit level, but lower than the turbidity level of the control station (I-1-C)(14.86 NTU). General site cleaning, dismantling formwork at Bay 5 and 6, filling tie bar hole in cascade, temporary traffic arrangement (TTA) at Shing Mun Road and geotechnical instrumentation monitoring were undertaken during measurement. No direct disturbance was observed from the site. The exceedance was considered to be contributed by high turbidity level at upstream location and heavy rainfall. Since the exceedance was non-project related, no further action was required.

l Two exceedances of turbidity limit level were recorded at I-2 on 17 and 22 June 2011. The measured turbidity levels (14.31 and 15.19 NTU, respectively) were higher than the baseline limit level, but lower than the turbidity level of the control station (I-2-C)(14.54 and 15.49 NTU, respectively). The construction conducted on 17 June 2011 included general site cleaning, housekeeping and temporary traffic arrangement (TTA), excavation (rock splitting and mucking) at vortex drop shaft, drilling, survey check and rock mapping at man access shaft, excavating the receiving pit at Portion G, and breaking footing of piling platform and on 22 June 2011 included general site cleaning, housekeeping and TTA, excavation (drilling holes and rock splitting) at vortex drop shaft, drilling holes at man access shaft, rock breaking for receiving pit at Portion G slope, and breaking footing of piling platform and excavation for skin wall. No direct disturbance was observed from the site. The exceedances were considered to be contributed by high turbidity level at upstream location and heavy rainfall. Since the exceedance was non-project related, no further action was required.

l Two exceedances of turbidity limit level were recorded at I-3 on 17 and 22 June 2011. The measured turbidity levels (25.75 and 9.08 NTU, respectively) were higher than the baseline limit level, but lower than the turbidity level of the control station (I-3-C)(26.05 and 9.20 NTU, respectively). The construction conducted on 17 June 2011 included general site cleaning and housekeeping, monitoring of de-formation monitoring point (DMP), drilling rock dowel and splitting holes in shaft, and slope cutting and backfilling at PB wall and on 22 June 2011 included general site cleaning and housekeeping, monitoring of DMP, drilling splitting holes and rock breaking in shaft, curing of planter wall and backfilling, and slope reinstatement and backfilling at PB wall. No direct disturbance was observed from the site. The exceedances were considered to be contributed by high turbidity level at upstream location and heavy rainfall. Since the exceedance was non-project related, no further action was required.

l Two exceedances of SS action level were recorded at I-1 on 9 and 17 June 2011. On 9 June 2011, the measured SS level (2.50 mg/L) was lower than the baseline action/limit level, but slightly higher than 120% of SS level of the control station (I-1-C) (2.00 mg/L). General site cleaning, removing working platform next to Bay 5, formwork at cascade Bay 7, trimming shotcrete and cutting wire mesh, installation of bracket on spiral ramp for construction of Shing Mun Road platform and geotechnical instrumentation monitoring were undertaken during measurement. No direct disturbance was observed from the site. The exceedance was considered to be contributed by low SS level at the control station. On 17 June 2011, the measured SS level (9.65 mg/L) was higher than the baseline action level but lower than 120% of the SS level of the control station (I-1-C) (9.00 mg/L). General site cleaning, dismantling formwork at Bay 5 and 6, filling tie bar hole in cascade, TTA at Shing Mun Road and geotechnical instrumentation monitoring were undertaken during measurement. No direct disturbance was observed from the site. The exceedance was considered to be contributed by high SS level at upstream location and heavy rainfall. Since the exceedances were non-project related, no further action was required.

l Two exceedances of SS limit level were recorded at I-2 on 17 and 22 June 2011. The measured SS levels (8.85 and 14.05 mg/L, respectively) were higher than the baseline limit level, but former was lower than 120% of the SS level of the control station and the latter was nearly the same as the SS level of the control station (I-2-C) (8.75 and 14.00 mg/L, respectively). The construction activities conducted on 17 June 2011 included general site cleaning, housekeeping and TTA, excavation (rock splitting and mucking) at vortex drop shaft, drilling, survey check and rock mapping at man access shaft, excavating the receiving pit at Portion G, and breaking footing of piling platform and on 22 June 2011 included general site cleaning, housekeeping and TTA, excavation (drilling holes and rock splitting) at vortex drop shaft, drilling holes at man access shaft, rock breaking for receiving pit at Portion G slope, and breaking footing of piling platform and excavation for skin wall. No direct disturbance was observed from the site. The exceedances were considered to be contributed by high SS level at upstream location and heavy rainfall. Since the exceedances were non-project related, no further action was required.

l One exceedance of SS limit level was recorded at I-3 on 17 June 2011. The measured SS level (18.10 mg/L) was higher than the baseline limit level, but lower than 120% of the SS level of the control station (I-3-C)(17.75 mg/L). General site cleaning and housekeeping, monitoring of DMP, drilling rock dowel and splitting holes in shaft, and slope cutting and backfilling at PB wall were undertaken during measurement. No direct disturbance was observed from the site. The exceedance was considered to be contributed by high SS level at upstream location and heavy rainfall. Since the exceedance was non-project related, no further action was required.

Marine Water Quality Monitoring

3.5.10              A total of 3 non-project related exceedances were recorded in April 2011 including:

l Three exceedances of SS action levels were recorded at O-1(FT) on 8, 11 and 13 April 2011. The measured SS levels (depth-averaged) at O-1(FT) (5.35, 5.27 and 3.90 mg/L, respectively) were below the baseline action/limit level but were higher than 120% of the control station's SS level (O-1-C(FT)) (4.20, 4.27 and 3.03 mg/L, respectively) at the same tide of the same day. The construction activities conducted include laying non-woven geo-textile and backfilling grade 200 rockfill behind installed seawall blocks on 8 April 2011, installation of temporary concrete blocks and placing levelling stone on 11 April 2011 and installation of bagged concrete for seawall formation on 13 April 2011. During monitoring, silt curtain was deployed along the Portion E boundary line and extended from seawater level to seabed and floating type silt curtain was also employed at the inner side. Since there was no other marine works during monitoring, the exceedances were considered to be contributed by natural variation and no further action was required.

3.5.11              A total of 21 non-project related exceedances were recorded in May 2011 including:

l Three exceedances of DO action levels were recorded at O-1(FT) on 7 and 18 May 2011. The measured DO levels were below baseline action level. For exceedance on 7 May 2011 (marine surface) and 18 May 2011 (marine surface), the DO levels (both levels are 6.81 mg/L) are slightly (about 0.03 mg/L) below the baseline action level.  For the exceedance on 18 May 2011 (marine bottom), the measured DO level (6.98 mg/L) is also slightly (about 0.01 mg/L) lower than the baseline action level and higher than DO level at the corresponding control station (6.74 mg/L). The construction activities conducted on 7 May 2011 include adjusting level of installed seawall blocks and survey check on installed seawall blocks, and the construction activities conducted on 18 May 2011 include adjusting level of installed seawall blocks only.  No other marine works were conducted and no direct disturbance from the construction site was observed. The exceedances were, therefore, considered as non-project related.  No further action was required.

l Four exceedances of DO action levels were recorded at O-1(ET) on 20, 27 and 30 May 2011. For exceedance on 20 May 2011 (marine surface), the measured DO level (6.99 mg/L) was below the baseline action level but higher than the marine surface DO level of the control station (6.96 mg/). For exceedances on 27 May (marine mid-depth) and 30 May 2011 (marine surface and marine mid-depth), the measured DO levels (6.98, 6.97 and 6.94 mg/L, respectively) were slightly lower than the baseline action level and was lower than DO levels of the corresponding control stations (7.19, 7.09 and 6.98 mg/L, respectively). The construction activities conducted included maintenance of the inner silt curtain on 20 May 2011, backfilling grade 700 rockfill and type II armour behind seawall blocks on 27 May 2011, and backfilling type II armour behind seawall blocks at the eastern side on 30 May 2011.  There was no other marine works undertaken during monitoring and no direct disturbance from the construction site was observed.  The exceedances were, therefore, considered contributed by natural variation and non-project related.  No further action was required.

l Five exceedances of DO limit levels were recorded at O-1(FT) on 7, 13, 18 and 30 May 2011. For exceedance on 7 May (marine mid-depth), the measured DO level (6.79 mg/L) was slightly lower than baseline limit level and was lower than DO level of the corresponding control station (6.91 mg/L). For exceedances on 7 May (marine bottom) and 30 May (marine bottom), the measured DO levels (6.91 and 6.95 mg/L, respectively) were slightly lower than the baseline limit level, but higher than DO levels of the corresponding control station (6.78 and 6.92 mg/L, respectively). For exceedances on 13 May (marine bottom) and 18 May (marine mid-depth), the measured DO levels (6.83 and 6.78 mg/L, respectively) were lower than the baseline limit level and slightly lower than DO levels of the corresponding control station (6.89 and 6.79 mg/L, respectively). The construction activities conducted included adjusting level of installed seawall blocks and survey check on installed seawall blocks on 7 and 18 May 2011, loading seawall blocks onto installed seawall blocks and preparation work for geotextile on 13 May 2011, and backfilling type II armour behind seawall blocks at eastern side on 30 May 2011.  There was no other marine works conducted during monitoring.  No direct disturbance from the construction site was observed.  The exceedances were, therefore, considered contributed by natural variation and non-project related.  No further action was required.

l Five exceedances of DO limit levels were recorded at O-1(ET) on 7, 13 and 20 May 2011. For exceedance on 7 May 2011 (marine surface and marine mid-depth), the measured DO levels (6.90 and 6.84 mg/L, respectively) were below the baseline limit level but higher than DO levels of the corresponding control stations (6.88 and 6.76 mg/L, respectively). For exceedances on 13 May 2011 (marine surface and marine mid-depth) and 20 May 2011 (marine mid-depth), the measured DO levels (6.90, 6.85 and 6.92 mg/L, respectively) were slightly lower than the baseline limit level and lower than DO levels of the corresponding control stations (7.08, 7.01 and 7.07 mg/L, respectively). The construction activities conducted included adjusting level of installed seawall blocks and survey check on installed seawall blocks on 7 May 2011, loading seawall blocks onto installed seawall blocks and preparation work for geotextile on 13 May 2011, and maintenance of the inner silt curtain on 20 May 2011.  There was on other marine works conducted during monitoring.  No direct disturbance from the construction site was observed.  The exceedances were, therefore, considered contributed by natural variation and non-project related.  No further action was required.

l One exceedance of SS action level was recorded at O-1(FT) on 3 May 2011. The measured SS level (depth-averaged) (8.45 mg/L) at O-1(FT) was below the baseline action/limit level but was higher than 120% of the control station's SS level at the same tide of the same day (6.97 mg/L). Only placing seawall blocks were undertaken and there was no other marine works conducted during the monitoring. Silt curtain was deployed along the Portion E boundary line and extended from seawater level to seabed. Floating type silt curtain was also employed at the inner side.  As such, the exceedance was considered to be contributed by natural variation and no further action was required.

l One exceedance of SS action level was recorded at O-1(ET) on 18 May 2011. The measured SS level (7.02 mg/L) was below the baseline action level but was slightly higher than 120% of the measured SS level at the control station (O-1-C(ET))(5.78 mg/L). Adjusting level of installed seawall blocks was conducted at the Outfall basin (Portion E) during monitoring and there was no other marine works conducted. As no direct disturbance from the site was observed and the measured SS level was relatively low comparing with the baseline action level, the exceedance was considered to be contributed by natural variation and non-project related. Therefore, no further action was required.

l One exceedance of SS limit level was recorded at O-1(FT) on 27 May 2011. The measured SS level (3.10 mg/L) at the monitoring station was well below the baseline action/limit level but slightly higher than 130% of the SS level of the control station (2.33 mg/L). Backfilling grade 700 rockfill and type II armour behind seawall blocks was undertaken at the Outfall basin (Portion E) during monitoring. No other marine works was conducted. No direct disturbance from the site was observed during monitoring. Therefore, the exceedance was considered to be contributed by low SS level of the control station and natural variation. Since the exceedance was non-project related, no further action was required.

l One exceedance of SS limit level was recorded at O-1(ET) on 20 May 2011. The measured SS level (5.75 mg/L) at the monitoring station was well below the baseline action level but higher than 130% of the SS level measured at the control station (4.27 mg/L). Only maintenance of the inner silt curtain was undertaken at the Outfall basin (Portion E) during monitoring and no other marine works was conducted. No direct disturbance from the site was observed. Therefore, the exceedance was considered to be contributed by natural variation and relatively low SS level at the control station. Since the exceedance was non-project related, no further action was required.

3.5.12              A total of 37 non-project related exceedances were recorded in June 2011 including:

l One exceedance of DO action level was recorded at O-1(FT) (marine mid-depth) on 20 June 2011. The measured DO level (6.81 mg/L) at the monitoring station was below the baseline action level and lower than DO level (6.96 mg/L) of the corresponding control station (about 2.2%). Only re-position of the inner silt curtain and carrying out fifth shipment of disposal to TM38 were undertaken at the Outfall basin (Portion E) on the monitoring day. No other marine works was conducted. No direct disturbance from the site was observed during monitoring. Therefore, the exceedance was considered to be contributed by natural variation and no further action was required.

l Three exceedances of DO action level were recorded at O-1(ET) (marine surface) on 3 and 7 June 2011 and at O-1(ET) (marine bottom) on 17 June 2011. The measured DO levels (6.97, 6.98 and 6.66 mg/L, respectively) at the monitoring station were below the baseline action level and lower than DO level of the corresponding control station (7.20, 7.02 and 6.69 mg/L, respectively).  Details of the construction activities conducted on each monitoring days are given in Appendix G.  Since no direct disturbance from the site was observed during monitoring, the exceedances were considered non-project related and no further action was required.

l Three exceedances of DO action level were recorded at O-1(ET) (marine mid-depth) on 3, 7 and 20 June 2011. The measured DO levels of these three monitoring days were lower than the baseline action level. On 3 and 20 June 2011, the measured DO levels (6.98 and 6.99 mg/L, respectively) were higher than the DO level of the corresponding control stations (6.92 and 6.91 mg/l, respectively). On 7 June 2011, the measured DO level (6.94 mg/L) was lower than the DO level of the corresponding control station (7.11 mg/L). Details of the construction activities conducted on each monitoring days are given in Appendix G. Since no direct disturbance from the site was observed during monitoring, the exceedances were considered non-project related and no further action was required.

l Five exceedances of DO limit level were recorded at O-1(FT)(Marine surface) on 15, 17, 20, 27 and 29 June 2011. The measured DO levels (6.70, 6.45 and 6.70 mg/L, respectively) on 15, 17 and 20 were lower than the baseline limit level and lower than the DO levels of the corresponding control station (6.75, 6.48 and 6.86 mg/L, respectively). For 27 and 29 June 2011, the measured DO levels (6.74 and 6.78 mg/L, respectively) were lower than the baseline DO limit level, but higher than the DO levels of the corresponding control stations (6.69 and 6.58 mg/L, respectively). Details of the construction activities conducted on each monitoring days are given in Appendix G. Since no direct disturbance was observed from the site during monitoring, the exceedances were considered non-project related. Therefore, no further action was required.

l Two exceedances of DO limit level were recorded at O-1(FT)(marine mid-depth) on 17 and 29 June 2011. The measured DO levels (6.50 and 6.68 mg/L, respectively) on 17 and 29 were lower than the baseline limit level and slightly lower than the DO levels of the corresponding control station (6.53 and 6.76 mg/L, respectively). Details of the construction activities conducted on each monitoring days are given in Appendix G. Since no direct disturbance was observed from the site during monitoring, the exceedances were considered non-project related. Therefore, no further action was required.

l Seven exceedances of DO limit level were recorded at O-1(FT)(marine bottom) on 7, 11, 13, 15, 17, 20 and 29 June 2011. The measured DO levels of these seven monitoring days were lower than the baseline limit level. On 7, 11, 15, 17 and 29 June 2011, the measured DO levels (6.94, 6.83, 6.88, 6.60 and 6.79 mg/L, respectively) were slightly lower than the DO levels of the corresponding control stations (7.08, 6.90, 6.91, 6.67 and 6.80 mg/L, respectively). On 13 June 2011, the measured DO level (6.89 mg/L) were the same as the corresponding control station. For 20 June 2011, the measured DO level (6.95 mg/L) was higher than the DO level of the corresponding control station (6.79 mg/L). Details of the construction activities conducted on each monitoring days are given in Appendix G. Since no direct disturbance from the site was observed, the exceedances were considered non-project related and no further action was required. 

l Eight exceedances of DO limit level were recorded at O-1(ET) (marine surface) on 9, 11, 15, 17, 20, 24, 27 and 29 June 2011. The measured DO levels of these eight monitoring days were lower than the baseline limit level. On 9, 11, 15, and 20 June 2011, the measured DO levels (6.89, 6.76, 6.76 and 6.80 mg/L, respectively) were lower than the DO levels of the corresponding control station (7.00, 6.82, 6.83 and 6.86 mg/L, respectively). For 17, 24, 27 and 29 June 2011, the measured DO levels (6.73, 6.92, 6.89 and 6.82 mg/L, respectively) were higher than the DO levels of the corresponding control station (6.61, 6.88, 6.82 and 6.70 mg/L). Details of the construction activities conducted on each monitoring days are given in Appendix G. Since no direct disturbance from the site was observed, the exceedances were considered non-project related and no further action was required.

l Six exceedances of DO limit level were recorded at O-1(ET) (marine mid-depth) on 1, 11, 15, 17, 27 and 29 June 2011. The measured DO levels of these six monitoring days were lower than the baseline limit level. On 1, 11, 15, 27 and 29 June 2011, the measured DO levels (6.93, 6.89, 6.69, 6.82 and 6.72 mg/L, respectively) were lower than the DO levels of the corresponding control station (7.00, 6.92, 6.77, 6.97 and 6.81 mg/L, respectively). For 17 June 2011, the measured DO level (6.62 mg/L) was higher than the DO level of the corresponding control station (6.55 mg/L). Details of the construction activities conducted on each monitoring days are given in Appendix G. Since no direct disturbance from the site was observed, the exceedance was considered non-project related and no further action was required.

l Two exceedances of SS limit action level were recorded at O-1(ET) (depth-averaged) on 11 and 27 June 2011. The measured SS levels (3.60 and 9.20 mg/L, respectively) at the monitoring station were below the baseline action/limit, but higher than 130% of the SS level of the corresponding control station (2.48 and 5.97 mg/L, respectively). On 11 June 2011, only outer silt curtain maintenance and repairing was undertaken at the Outfall basin (Portion E). On 27 June 2011, the derrick barge was unloading the excavated material at Tuen Mun Area 38. Since no other marine works was conducted, the exceedances were considered as contributed by natural variation. Therefore, no further action was required.

3.5.13              The above mentioned exceedances were considered non-project related. However, proper mitigation measures had been implemented during measurements. Details of the above mentioned investigations could be referred to the Interim Notifications of Environmental Quality Limits Exceedances as enclosed in Appendix G.

Monitoring Station

Temperature

DO (mg/L)

pH

Turbidity (NTU)

Suspended Solid (mg/L)

Range

Range

Action / Limit Level

Range

Range

Action / Limit Level

Range

Action / Limit Level

I-1

19.50

-

31.60

6.60

-

7.86

3.42

/

3.34

7.05

-

8.74

2.05

-

14.79

9.75

/

12.47

<2.00

-

10.95

8.85

/

10.17

I-1C

19.50

-

31.50

6.63

-

7.94

 

-

 

7.04

-

8.74

2.07

-

14.86

 

-

 

<2.00

-

10.60

 

-

 

I-2

19.70

-

31.30

6.62

-

7.60

3.66

/

3.63

7.55

-

8.91

0.91

-

15.19

6.63

/

6.99

<2.00

-

14.05

7.68

/

8.34

I-2C

19.80

-

31.30

6.53

-

7.83

 

-

 

7.55

-

8.90

0.99

-

15.49

 

-

 

<2.00

-

14.00

 

-

 

I-3

20.55

-

31.20

6.50

-

7.79

3.65

/

3.51

7.56

-

10.95

1.06

-

25.75

3.99

/

4.18

<2.00

-

21.50

6.13

/

7.23

I-3C

20.50

-

31.05

6.54

-

7.91

 

-

 

7.56

-

10.96

1.07

-

26.05

 

-

 

<2.00

-

22.15

 

-

 

Note:   Italic indicates the exceedances of Action Levels

Bold indicates the exceedances of Limit Levels

Table 3-12       Summary of Impact Water Quality Monitoring Results

 

Monitoring
Station

Temperature

DO (mg/L)

pH

Turbidity (NTU)

Suspended Solid (mg/L)

Range

Range

Action / Limit Level

Range

Range

Action / Limit Level

Range

Action / Limit Level

O-1(FT)

Surface

19.60

-

31.80

6.45

-

7.80

6.84

/

6.81

7.87

-

8.70

1.13

-

8.71

10.35

/

13.15

<2.00

-

13.68

14.10

/

18.08

Middle

6.50

-

7.79

Bottom

6.60

-

7.93

6.99

/

6.96

O-1-C(FT)

Surface

19.77

-

31.83

6.48

-

7.71

-

/

-

7.87

-

8.70

1.15

-

8.82

-

/

-

<2.00

-

13.12

-

/

-

Middle

6.53

-

7.76

Bottom

6.67

-

7.84

O-1(ET)

Surface

19.55

-

31.97

6.73

-

7.84

7.02

/

6.94

7.91

-

8.70

1.22

-

8.56

11.87

/

13.44

<2.00

-

9.20

13.25

/

14.39

Middle

6.62

-

7.99

Bottom

6.66

-

7.75

6.70

/

6.48

O-1-C(ET)

Surface

19.43

-

31.93

6.61

-

7.84

-

/

-

7.91

-

8.70

1.30

-

8.59

-

/

-

<2.00

-

8.78

-

/

-

Middle

6.55

-

7.66

Bottom

6.67

-

7.69

Note:   Italic indicates the exceedances of Action Levels

Bold indicates the exceedances of Limit Levels

Table 3-13       Summary of Impact Marine Water Quality Monitoring Results

3.6               High pH Records at I-3 and I-3-C

3.6.1                As indicated in Table 3-12, relatively high pH values were recorded at I-3 and I-3-C. Same monitoring equipment was used to measure pH values at other monitoring and control stations during the same period and the pH records at these locations were relatively normal.  

3.6.2                Although the source of high pH records at I-3 and I-3-C has not been identified, the pH values recorded at these stations on the same monitoring day are consistent.  Thus, we considered that these high pH records were non-project related and adverse water quality impact on pH value at I-3 due to the Project was not anticipated.

4                     Quarterly Summary; Environmental Condition and Non-Compliance Records

4.1               Summary of Waste Disposal Records

4.1.1                According to the information provided by the Contractor; the quantities of C&D materials in the reporting period are summarized in Table 4-1

Status of Waste Management

April 11

May 11

June 11

Inert C&D Material Disposed of to Public Fill at Tuen Mun (m3)

3,105.4

3912.5

5,250.3

Inert C&D Material Reused in this Contract (m3)

181.0

475.0

117.5

Inert C&D Material Reused in other Contract* (m3)

17,946.7

19,530.0

16,187.5

Metals Generated (kg)

Nil

Nil

Nil

Paper / Cardboard Packaging (kg)

Nil

Nil

350.0

Plastics (kg)

Nil

Nil

Nil

Chemical Waste (kg)

4,341.4

Nil

1,812.0

General Waste Disposed of to NENT Landfill (m3)

34.8

52.0

34.1

*  Other Contracts include DC/2007/08, YL/2009/01, HY/2007/10,HY/2008/09,  Wo Shang Wai, DC/2007/17, CV/2009/14, Tailor Recycle Aggregate, XRL 823A and 823B, XRL 825, TW 7 and CUHK.

Table 4-1         Waste Generated from April to June 2011

4.2               Weather Conditions

4.2.1                The weather conditions during the period from April to June 2011 were mainly sunny, fine, cloudy and rainy.

4.3               Summary of Project-Related Exceedances

4.3.1                Summary of exceedance results are summarized in Table 4-2. Appendix G shows the Interim Notifications of Environmental Quality Limits Exceedances issued in the reporting period.

Environmental Monitoring

Total No. of Measurement

Action Level Exceedance

% of Action Level Exceedance

Limit Level Exceedance

% of Limit Level Exceedance

Air Quality

204

0

0

0

0

Air Borne Noise

65

1 (complaint)

1.5

0

0

Ground Borne Noise

2

0

0

0

0

Water

376

0

0

0

0

Table 4-2         Summary of Project- related Exceedances

5                     Complaint

5.1.1                A complaint hotline at 9850 3241 of the Contractor has been established for the Project. 

5.1.2                During the reporting period, one environmental complaint was received.  EPD informed ET on 8 July 2011 that one public complaint regarding construction dust and daytime construction noise from the Intake I-3 construction site was received on 30 June 2011. The ET conducted site investigations at Intake I-3 construction site on 8 and 20 July 2011 to review and audit the site setting, mitigation measures implemented on-site and the environmental performance of the Contractor.  Noise monitoring at NSR 6 was increased to twice per week from 11 July to 30 July 2011 according to the requirement of the EM&A Manual.  An investigation report was submitted to EPD in August 2011.  The issue of complaint was considered closed.  Noise monitoring results would be reported in the Monthly EM&A Report of July 2011.  Details of the complaint investigation and observations can be referred to Appendix H.

 

5.1.3                Cumulative statistics of environmental complaints are shown in Table 5-1.

Complaints Received in the Reporting Period

Cumulative Number of Complaints

1

22

Table 5-1         Cumulative Statistics of Environmental Complaints

6                     Summary of Notification of Summons, Successful Prosecutions and Corrective Actions

6.1.1                No summons and successful prosecution was received during the reporting period.

6.1.2                Cumulative statistics of Notification of Summon; Successful Prosecutions and Convictions are shown in Table 6-1.

Notification of Summons

Successful Prosecution

April – June 2011

Cumulative

April – June 2011

Cumulative

0

0

0

0

Table 6-1         Cumulative Statistics of Notification of Summons and Successful Prosecutions

7                     Comments, Recommendations and Conclusion

7.1.1                During the reporting period, no project related exceedance of air quality monitoring was recorded. No exceedance of noise limit level was recorded, but EPD received one noise complaint on 30 June 2011 that triggered the exceedance of action level. Finally, exceedances of water quality monitoring were recorded but none of these exceedances were related to Project’s construction activities.

7.1.2                During the reporting period, one environmental complaint was received.  EPD informed ET on 8 July 2011 that one public complaint regarding construction dust and daytime construction noise from the Intake I-3 construction site was received on 30 June 2011. The ET conducted site investigations at Intake I-3 construction site on 8 and 20 July 2011 to review and audit the site setting, mitigation measures implemented on-site and the environmental performance of the Contractor.  Noise monitoring at NSR 6 was increased to twice per week from 11 July to 30 July 2011.  An investigation report was submitted to EPD in August 2011. The issue of complaint was considered closed.  The noise monitoring results would be reported in the Monthly EM&A Report of July 2011.

7.1.3                No Notification of Summons has been received since the commencement of the Project. 

7.1.4                Waste management mitigation measures have been implemented by the Contractor within the reporting period.  Waste figures during the reporting period are summarized in Table 7-1.

Status of Waste Management

Quantity

Inert C&D Material Disposed of to Public Fill at Tuen Mun (m3)

12,268.2

Inert C&D Material Reused in this Contract (m3)

773.5

Inert C&D Material Reused in other Contract* (m3)

53,664.2

Metals Generated (kg)

Nil

Paper / Cardboard Packaging (kg)

350.0

Plastics (kg)

Nil

Chemical Waste (kg)

6,153.4

General Waste Disposed of to NENT Landfill (m3)

120.9

*  Other Contracts include DC/2007/08, YL/2009/01, HY/2007/10,HY/2008/09,  Wo Shang Wai, DC/2007/17, CV/2009/14, Tailor Recycle Aggregate, XRL 823A and 823B, XRL 825, TW 7 and CUHK.

Table 7-1     Total Wastes Generated From April to June 2011

 

Appendix A

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Site Map and Works Area

 

Appendix B

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Organization Chart

 

Appendix C

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Works Programme

 

Appendix D

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Implementation Status of Environmental Mitigation Measures

 

Appendix E

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Monitoring Locations

 

Appendix F

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Monitoring Results

 

Appendix G

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Interim Notifications of Environmental Quality Limits Exceedances

 

Appendix H

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Complaint Log