Table of Content

 

 

 

EXECUTIVE SUMMARY. 1

1.......... introduction. 3

1.1        Background. 3

1.2        Scope of Report 4

1.3        Project Organization. 4

1.4        Summary of Construction Works. 4

2.......... Summary of EM&Amp;A Programme Requirements. 5

2.1          Monitoring Parameters and Locations. 5

2.2          Environmental Quality Performance Limits (Action/Limit Levels) 6

2.3          Environmental Mitigation Measures. 6

3.......... MONITORING Results. 7

3.1        Air Quality. 7

3.2        Construction Noise. 8

3.3        Landscape and Visual 10

3.4        Environmental Site Inspection. 11

4.......... Advice on solid and liquid waste management status. 13

4.1        Solid and Liquid Waste Management Status and Recommendations. 13

5.......... Summary of Non-Compliance (Exceedances) of environmental qualitY Performance Limits (Action and Limit Levels) 14

5.1        Summary of Exceedances and Review of the Reasons for and the Implications of Non-compliance  14

6.......... Complaint, Notification of Summons and Successful Prosecution. 15

6.1        Summary of Complaints, Notification of Summons and Successful Prosecutions. 15

7.......... Comments, Recommendations and Conclusions. 16

7.1          Comments on Mitigation Measures. 16

7.2          Recommendations on EM&Amp;A Programme. 18

7.3          Conclusions. 18

 


List of Tables

Table 1‑1 ........ Contact Information of Key Personnel 4

Table 2‑1.......... Locations of Air Quality Monitoring Station. 5

Table 2‑2.......... Air Quality Monitoring Parameters, Frequency and Duration. 5

Table 2‑3.......... Locations of Impact Noise Monitoring Station. 5

Table 2‑4.......... Noise Monitoring Parameters, Frequency and Duration. 5

Table 3‑1.......... Summary of Number of Exceedances for 1-hr and 24-hr TSP Concentration. 7

Table 3‑2 ........ Summary of Number of Exceedances for Daytime, Evening Time and Night-time Construction Impact Noise Monitoring. 9

Table 4‑1 ........ Summary of Quantity of Waste for Disposal 13

Table 6‑1.......... Summary of Environmental Complaints and Prosecutions. 15

 

 

List of Figures

 

Figure 1.1........ General Layout Plan of the Project Site

Figure 2.1         Location of Air Quality Monitoring Station During Impact Monitoring

Figure 3.1         Location of Noise Monitoring Station During Impact Monitoring

 

 

List of Appendices

 

Appendix A       Project Organization Structure

Appendix B       Construction Programme

Appendix C       Implementation Schedule of Environmental Mitigation Measures (EMIS)

Appendix D      Summary of Action and Limit Levels

Appendix E       Graphical Presentation of Air Quality Monitoring Results over Past Four Months

Appendix F       Graphical Presentation of Noise Monitoring Results over Past Four Months

Appendix G      Cumulative Statistics on Exceedances, Complaints, Notification of Summons and Successful Prosecutions

 

 


EXECUTIVE SUMMARY

The proposed construction of interconnection tunnel and diaphragm wall for main pumping station at Stonecutters Island Sewage Treatment Works (SCISTW) (the Project) is a Designated Project under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is governed by an Environmental Permit (EP-322/2008/E). The Project comprises the construction of interconnection tunnel between the inlet chamber of the main pumping station and the existing riser shaft and diaphragm wall for the main pumping station.

 

China State - Shanghai Tunnel Joint Venture was commissioned as the Contractor of the Project. AECOM Asia Co. Ltd. was employed by China State - Shanghai Tunnel Joint Venture as the Environmental Team to undertake the EM&Amp;A works for the Project.

 

The construction phase of the Project commenced on 10 December 2009. The impact environmental monitoring and audit (EM&Amp;A) programme of the Project, which includes air quality, noise and landscape and visual monitoring and environmental site inspections, was commenced on 10 December 2009.

 

This is the fourth Quarterly Environmental Monitoring and Audit Report prepared for the captioned Project. This report documents the findings of EM&Amp;A works conducted in the period between 1 September 2010 and 30 November 2010. As informed by the Contractor, construction activities in the reporting quarter were:

 

l  Drainage work;

l  Tree transplanting and protection;

l  Construction of diaphragm wall for the main pumping station and its inlet chamber and at

launching shaft region of interconnection tunnel;

l  Construction of utility diversion and cable trough; and

l  Relocation of existing ferric chloride unloading facility.


Environmental Monitoring Works

EM&Amp;A Programme

 

A summary of monitoring and audit activities conducted in the reporting quarter is listed below:

 

24-hour TSP monitoring

16 sessions

1-hour TSP monitoring

  48 sessions

Daytime Noise monitoring 

               14 sessions

Evening Time Noise monitoring

42 sessions

Night-time Noise monitoring

  0 sessions

Landscape and Visual Inspection

3 sessions

Environmental Site Inspection

14 sessions

Breaches of Action and Limit Levels for Air Quality

No exceedance of Action and Limit Level was recorded for both 1-hour TSP and 24-hour TSP monitoring in the reporting quarter.

Breaches of Action and Limit Levels for Noise

According to the information provided by the Contractor, no Action Level exceedance was recorded since no noise related complaint was received in the reporting quarter.

No Limit Level exceedance of noise was recorded at all monitoring station in the reporting quarter.

Complaint, Notification of Summons and Successful Prosecution

According to the information provided by the Contractor, no complaint, notification of summons and successful prosecution was received in the reporting quarter.

Reporting Changes

As confirmed by the Officer from FSD Diving Rescue and Diving Rescue Centre, there is no class during night-time for Year 2010. According to the EIA report, no other noise sensitive receiver was identified near the site area. Thus, the noise monitoring during the night-time period was considered not necessary for Year 2010.

 

With the approval from IEC & ER, the noise monitoring at monitoring station (NM6) during night-time period was suspended from April 2010 until the end of Year 2010.  The necessity of conducting noise monitoring at this station from Year 2011 will be reviewed later.


1             introduction

1.1          Background

1.1.1       The proposed construction of interconnection tunnel and diaphragm wall for main pumping station at Stonecutters Island Sewage Treatment Works (SCISTW) (the Project) is a Designated Project under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is governed by an Environmental Permit (EP-322/2008/E).

1.1.2       The Project site is located in the Sham Shui Po District. It is located within the existing Stonecutters Island Sewage Treatment Works (SCISTW), which is bounded by Ngong Shung Road to the north and the west. The general layout plan of the Project site showing the contract area is shown in Figure 1.1.

1.1.3       The objective of the Project ížHarbour Area Treatment Scheme (HATS) Stage 2A - Construction of Interconnection Tunnel and Diaphragm Wall for Main Pumping Station at Stonecutters Island Sewage Treatment Works (SCISTW)íĘ under Contract DC/2009/05 is to provide interconnection tunnel between the inlet chamber of the main pumping station and the existing riser shaft and diaphragm wall for the main pumping station.

1.1.4       The scope of the Project comprises mainly:

n    

l   Construction of interconnection tunnel with concrete lining between the Inlet Chamber of the main pumping station and the existing riser shaft;

l   Construction of diaphragm wall, base slab and pile cap for the main pumping station and its inlet chamber;

l   Excavation within the diaphragm walls for the main pumping station and its inlet chamber to founding levels;

l   Piling works for the main pumping station;

l   Utilities upgrading and diversion works;

l   Temporary launching shaft to be handed over to main pumping station Contractor;

l   Carrying out ground monitoring and instrumentation works;

l   Carrying out pumping test;

l   Miscellaneous building, civil and electrical and mechanical works; and

l   Landscape works.

 

1.1.5       The Project is anticipated to complete in mid 2012.

1.1.6       According to the Environmental Permit (EP-322/2008/E) and the EM&Amp;A Manual of the Project, there is a need of an EM&Amp;A programme including air quality and noise monitoring and landscape and visual impacts and environmental site inspections.

1.1.7       AECOM Asia Co. Ltd. was employed by the Contractor, China State - Shanghai Tunnel Joint Venture, as the Environmental Team (ET) to undertake the EM&Amp;A works for the Project. In accordance with the EM&Amp;A Manual of the Project, environmental monitoring of air quality, noise and landscape and visual impacts and environmental site inspections would be required for this Project.

1.1.8       The construction phase of the Project commenced on 10 December 2009. The impact environmental monitoring and audit (EM&Amp;A) programme of the Project, which includes air quality, noise and landscape and visual monitoring and environmental site inspections, was commenced on 10 December 2009.

 

1.2          Scope of Report

1.2.1       This is the fourth Quarterly Environmental Monitoring and Audit (EM&Amp;A) Report under the Contract DC/2009/05 íV Harbour Area Treatment Scheme (HATS) Stage 2A - Construction of Interconnection Tunnel and Diaphragm Wall for Main Pumping Station at Stonecutters Island Sewage Treatment Works (SCISTW). This report presents a summary of the environmental monitoring and audit works, list of activities and mitigation measures proposed by the ET for the Project in the period between 1 September 2010 and 30 November 2010.

 

1.3          Project Organization

1.3.1       The project organization structure is shown in Appendix A. The key personnel contact names and numbers are summarized in Table 1-1.

Table 11         Contact Information of Key Personnel

Party

Position

Name

Telephone

Fax

ER

(Ove Arup)

The Engineer

S.Y. Chan

2528 3031

2370 4377

The Engineer Representative

M.P. Gamini Ananda

2370 4311

2370 4377

The Engineer RepresentativeíŽs Coordinator

William Yu

2370 4311

2370 4377

IEC

(Mott MacDonald)

Independent Environmental Checker

Anne Kerr

2828 5793

2827 1823

Contractor

(China State íV Shanghai Tunnel Joint Venture)

Site Agent

Ben Siu

2370 3166

2370 2086

Environmental Officer

Holmes Wong

2370 3166

2370 2086

ET (AECOM)

ET Leader

Edith Ng

3105 8525

2891 0305

 

1.4          Summary of Construction Works

1.4.1       As informed by the Contractor, the Contactor has carried out the following major activities in the reporting quarter:

l  Drainage work;

l  Tree transplanting and protection;

l  Construction of diaphragm wall for the main pumping station and its inlet chamber and at

launching shaft region of interconnection tunnel;

l  Construction of utility diversion and cable trough; and

l  Relocation of existing ferric chloride unloading facility.

 

1.4.2       The latest Construction Programme of the Project is shown in Appendix B.

1.4.3       The mitigation measures implementation schedule (EMIS) are presented in Appendix C.


2             Summary of EM&Amp;A Programme Requirements

2.1          Monitoring Parameters and Locations

2.1.1       The EM&Amp;A Manual and Monitoring Proposal designated locations for the monitoring of environmental impacts in terms of construction noise and air quality impact due to the Project.  The description of monitoring parameters, frequencies and durations and detailed locations of monitoring stations for air quality and construction noise are listed below. The monitoring stations for air quality impact and construction noise are depicted in Figure 2.1 and 3.1 respectively.

Table 21          Locations of Air Quality Monitoring Station

ID

Location

Monitoring Station

AM7

West Kowloon No. 2 Sewage Pumping Station

Roof top of the premise

 

Table 22          Air Quality Monitoring Parameters, Frequency and Duration

Monitoring Station

Parameter

Frequency and Duration

 AM7

1-hour TSP

At least 3 times every 6 days

24-hour TSP

At least once every 6 days

 

Table 23          Locations of Impact Noise Monitoring Station

ID

Location

Monitoring Station

NM6

CustomsíŽ Marine Base

1m from the exterior of the roof top façade of

Block H of Government Dockyard

 

Table 24          Noise Monitoring Parameters, Frequency and Duration

Monitoring Station

Parameters and Duration

Frequency

NM6

30-min measurement at monitoring station between 0700 and 1900 on normal weekdays.

 

3 times of 5-min measurement at monitoring station during restricted hours if construction works were carried out.

 

Leq, L10 and L90 would be recorded.

At least once per week

 

 

2.1.2       The EM&Amp;A Manual also required monthly landscape and visual audit and weekly environmental site inspections for air quality, noise, water quality, as well as waste management.

 


2.2          Environmental Quality Performance Limits (Action/Limit Levels)

2.2.1       The environmental quality performance limits, i.e. Action and Limit Levels for air quality impact and construction noise monitoring works were derived from the baseline monitoring results as detailed in the EM&Amp;A Manual and Monitoring Proposal.  Appendix D shows the established Action and Limit Levels for all monitoring parameters. 

 

2.3          Environmental Mitigation Measures

2.3.1       Relevant environmental mitigation measures as recommended in the Project EIA final report were stipulated in the EM&Amp;A Manual and environmental requirement in contract documents for the Contractor to adopt. A list of mitigation measures and their implementation statuses, i.e. Implementation Schedule of Mitigation Measures (EM(S), are given in Appendix C.

 

 


3             MONITORING Results

3.1          Air Quality

3.1.1       Air quality monitoring, including 1-hr and 24-hr TSP, was conducted for at least three times every 6 days (for 1-hr TSP) and for at least once every 6 days (for 24-hr TSP) respectively at the designated monitoring station (AM7, Rooftop of West Kowloon No.2 Sewage Pumping Station), in accordance with the EM&Amp;A Manual and Monitoring Proposal.

3.1.2       Forty-eight (48) sessions of 1-hr TSP monitoring and sixteen (16) sessions of 24-hr TSP monitoring were conducted at the designated monitoring station (AM7) in the reporting quarter.

3.1.3       The weather was mostly sunny, with occasional cloudy/rainy events in the reporting quarter. The trend of air quality monitoring results for the reporting quarter is given in Appendix E. Major dust source included construction activities of the Project, other construction sites nearby and nearby traffic emissions.

3.1.4       There was no Action and Limit Level exceedance recorded for 1-hr TSP and 24-hr TSP in the reporting quarter.

3.1.5       Table 3-1 presents the number of exceedances recorded in each month of the reporting quarter. The number of monitoring events included regular impact monitoring events and additional ones, if any.

Table 31          Summary of Number of Exceedances for 1-hr and 24-hr TSP Concentration

Monitoring Parameter

Location

Level of Exceedance

Month

Sep 10

Oct 10

Nov 10

1-hr TSP

AM7

No. of monitoring events

15

18

15

Action

0

0

0

Limit

0

0

0

Total

0

0

0

24-hr TSP

AM7

No. of monitoring events

5

6

5

Action

0

0

0

Limit

0

0

0

Total

0

0

0

 

 

 


3.2          Construction Noise

3.2.1       Noise measurement was conducted at the designed monitoring station NM6, rooftop of CustomsíŽ Marine Base (Block H of Government Dockyard), for at least once per week during the construction phase (daytime (0700 íV 1900) and evening time (1900 íV 2300)) of the Project. Monitoring station (NM6) serves as an alternative location for FSD Diving Rescue and Diving Training Centre, which is regarded as a Noise Sensitive Receiver (NSR) as it is an institution.

3.2.1       As informed by the Contractor, the construction works had extended to include works during the evening time period (1900 to 2300) on all weekdays and during daytime and evening time period (0700 to 2300) on Sundays and Public Holidays in the reporting quarter, except on 22 and 23 September 2010. Moreover, construction works had been further extended to the night-time period (2300 to 0700 of next day) on all days, except on 22 and 23 September 2010. The construction works were conducted in accordance with the granted Construction Noise Permit (CNP) under NCO.

3.2.2       As confirmed by the Officer from FSD Diving Rescue and Diving Rescue Centre, there is no class during night-time period (from 2300 to 0700) for Year 2010. According to the EIA report, no noise sensitive receiver was identified near the site area except the FSD Diving Rescue and Diving Training Centre. Thus, the noise monitoring during the night-time period was considered not necessary for Year 2010.

3.2.3       With the approval from IEC & ER, the noise monitoring at monitoring station (NM6) during night-time period (from 2300 to 0700) was suspended from April 2010 until the end of Year 2010.  The necessity of conducting noise monitoring at this station from Year 2011 will be reviewed later.

3.2.4       Fourteen (14) daytime noise monitoring events and Forty-two (42) evening time noise monitoring events were carried out at the designated monitoring station (NM6) in the reporting quarter.

3.2.5       The weather was mostly sunny, with occasional cloudy events in the reporting quarter. The trend of construction noise impacts for the reporting quarter is given in Appendix F. Major noise source included construction activities of the Project, other construction sites nearby, operational noise form cargo transportation, community noise and traffic noise from nearby piers.

3.2.6       According to the ContractoríŽs information, no noise complaint was received in the reporting quarter; hence, no Action Level exceedance was recorded.

3.2.7       No Limit Level exceedance of noise was recorded at monitoring station NM6 in the reporting quarter.


 

3.2.8       Table 3-2 presents the number of exceedances recorded in each month of the reporting quarter. The number of monitoring events included regular monitoring events and additional ones, if any.

Table 32         Summary of Number of Exceedances for Daytime, Evening Time and Night-time Construction Impact Noise Monitoring

Monitoring Parameter

Location

Level of Exceedance

Month

Sep 10

Oct 10

Nov 10

Daytime Construction Noise

NM6

No. of monitoring events

4

5

5

Action

0

0

0

Limit

0

0

0

 

Total

0

0

0

Evening Time Construction Noise

NM6

No. of monitoring events

12

15

15

Action

0

0

0

Limit

0

0

0

 

Total

0

0

0

Night-time Construction Noise

NM6

No. of monitoring events

0

0

0

Action

0

0

0

Limit

0

0

0

 

Total

0

0

0

        Remarks: Exceedances which are not project-related are not presented in this table.

 


3.3          Landscape and Visual

3.3.1       In accordance with the EM&Amp;A Manual, during the construction phase of the Project, landscape and visual monitoring should be carried out monthly with supervision by a Registered Landscape Architect (RLA). The landscape and visual monitoring is to check if the design, implementation and maintenance of the landscape and visual mitigation measures are fully effectuated.

3.3.2       A Baseline Review was conducted prior to the commencement of the construction contracts. The Baseline Review is to review the landscape and visual baseline conditions associated with the Project. Based on the findings given in the Baseline Review Report, the baseline landscape resources, landscape character areas and visually sensitive receivers originally identified within the EIA study area are generally unchanged and rEM&Ain valid. Changes to the landscape and visual baseline are thus judged to be Insignificant.

3.3.3       Three (3) landscape and visual audits were conducted in the reporting quarter. Observations recorded during the audits in the reporting quarter are described below.

Protection of Existing Trees and Tree Works:

 

3.3.4       The Contractor had removed all the dead trees at the excavated material stockpile area.

3.3.5       It was observed that existing tree no. T30 was transplanted by others under Contract No. DC/2009/17.

3.3.6       As advised by the Contractor and the ER, the existing unmarked tree as found on site at the excavated material stockpile area was to be retained. The Contractor was reminded that proper tree protection should be provided to the unmarked tree. If it is proposed to be transplanted, the Contractor/ER was reminded that DLO approval beforehand is required.

3.3.7       It was observed that rectification of the high level nettings installed for screening of the existing trees at Portion 2 area had been sagged.  Also, it was observed that the barriers dEM&Arcating the tree protection zone at the Portion 2 area was broken down with construction equipments / materials placed next by.  The Contractor was reminded to rectify the nettings and properly re-instate the barriers for proper dEM&Arcation of the tree protection zone to prevent possible damage to the retained trees.

 


3.4          Environmental Site Inspection

3.4.1       There were fourteen (14) site inspections conducted in the reporting quarter to monitor the implementation of proper environmental pollution control and mitigation measures for the Project. The major concerns for the Project are air quality, noise, water quality and chemical and waste management. Observations recorded are described below.

3.4.2       The Contractor has rectified most of the observations as identified during environmental site inspections in the reporting quarter within agreed time frame. Rectifications of rEM&Aining identified items are undergoing by the Contractor. Follow-up inspections on the status on provision of mitigation measures will be conducted to ensure all identified items are mitigated properly.

 

3.4.3       Air Quality

íP            Soil stockpiles were observed at the utility diversion works area (works area near the main pumping station/inlet chamber works area, works area near the chemical storage tanks and works area near the sedimentation tanks). The Contractor is advised to fully cover up the soil stockpiles with tarpaulin sheet to suppress fugitive dust emission.

 

3.4.4       Noise

íP            Nil.

 

3.4.5       Water Quality

íP            Deposited silt was observed at the wheel washing bay at Portion 2 (launching shaft works area) and at the works area near the bentonite filtering station (near the gate) at main pumping station works area. The Contractor should clear the deposited silt within the works area regularly in order to avoid generation of silty run-off during heavy rainstorm. Also, wheel washing facilities provided on site should be maintained properly

íP            Soil stockpiles were observed at the utility diversion works area near the main pumping station/inlet chamber works area and works area near the chemical storage tanks. The Contractor should provide tarpaulin sheet coverage to the soil stockpile in order to avoid generation of silty run-off during rainstorm.

íP            Silty run-off was observed on the ground outside the gate at inlet chamber works area. The Contractor was advised to provide bunds/sand bags/channels, cover the gullies or other means at the site boundaries to avoid any surface run-off or wastewater from construction works flowing outside the works area.

íP            Substandard run-off pumping into the gulley was observed at utility diversion works area near the main pumping station/inlet chamber works area. The Contractor should ensure that rainwater/run-off pumped out from the trenches should be properly treated by desilting facilities prior to discharge.

 

3.4.6       Chemical and Waste Management

íP            Stockpile of steel waste was accumulated at designated steel waste storage area at main pumping station works area. The Contractor was advised to remove the steel waste in a timely manner.

íP            Oil drums and chemical containers placed within site area at main pumping station and inlet chamber, Portion 2 (launching shaft works area) and excavated material stockpile area were found improperly stored. The Contractor is recommended to conduct regular checking on the site condition and provide drip trays to oil drums and chemical containers placed within the works area to retain any leakage of oil and chemicals. Also, drip trays should be provided when works with potential oil leakage (like oil filling) were carrying out within site area.

íP            Oily liquid and silt accumulation was observed inside the drip trays underneath a generator placed at main pumping station works area. The Contractor should clear the liquid mixture and dispose of it as chemical waste. The Contractor is recommended to conduct regular inspection on the site condition to avoid any oily mixture accumulation, especially after rainstorm.

íP            Oil leakage was observed from an excavator worked at works area near main pumping station works area. The Contractor should repair the concerned excavator and provide proper measures to avoid any oil leaking onto the ground. Oil stains found on the ground should be cleared and dispose of as chemical waste.

íP            Oil stains were observed on the ground at the works area at main pumping station, inlet chamber and launching shaft. The Contractor should clear the oil stains and dispose of the waste as chemical waste. Proper measures (like provision of drip trays or temporarily with tarpaulin sheets) should be provided if oil leakage was observed from the machine worked on site and works with oil leakage potential (like oil filling) was carrying out on site.  The malfunction machineries should be repaired properly. Also, the Contractor should conduct regular check and maintenance of the machines worked on site to avoid any oil leakage them.

 

3.4.7       Others

íP            Nil.

 


4             Advice on solid and liquid waste management status

4.1          Solid and Liquid Waste Management Status and Recommendations

4.1.1       The Contractor is registered as a chemical waste producer for this Project. C & D material and waste sorting was carried out on site. Receptacles were available for general refuse and C&D wastes collection.

4.1.2       As advised by the Contractor, quantity of waste for disposal in the reporting quarter is summarized in the Table 4-1.

Table 41         Summary of Quantity of Waste for Disposal

Type of waste

Month

Total

Sep 10

Oct 10

Nov 10

C&D materials generated

Total C&D material generated

 6,783.03 tonnes

 5,114.49 tonnes

 6,742.10 tonnes

18,639.62 tonnes

Hard Rock and Large Broken Concrete

40.16 tonnes

352.50 tonnes

116.65 tonnes

509.31 tonnes

Soil, slurry and building debris

4,724.89 tonnes

3,188.29 tonnes

4,713.16 tonnes

12,626.34 tonnes

Mixed rock, concrete and soil

61.58 tonnes

256.51 tonnes

755.92 tonnes

1,074.01 tonnes

Used bentonite slurry

1,956.40 tonnes

1,317.19 tonnes

1,156.37 tonnes

4,429.96 tonnes

Reuse in other projects

0 tonnes

0 tonnes

0 tonnes

0 tonnes

Disposed to barging point

0 tonnes

0 tonnes

0 tonnes

0 tonnes

C&D wastes generated/collected

Metals

6,270 kg

23,240 kg

0 kg

29,510kg

Paper cardboard packing

0 kg

0 kg

0 kg

0 kg

Plastics

0 kg

0 kg

0 kg

0 kg

Chemical waste

3,800 L

0 L

2,000 L

5,800L

General refuse

11.01 tonnes

19.83 tonnes

12.12 tonnes

42.96tonnes

 

4.1.3       The Contractor is advised to properly maintain on site C&D material and waste sorting, collection and recording system and maximize reuse / recycle of C&D material and waste. The Contractor is reminded to properly maintain the site tidiness and dispose of the wastes accumulated on site regularly and properly.

 

 


5             Summary of Non-Compliance (Exceedances) of environmental qualitY Performance Limits (Action and Limit Levels)

 

5.1          Summary of Exceedances and Review of the Reasons for and the Implications of Non-compliance

5.1.1       There was no Action and Limit Level exceedance recorded for 1-hr TSP and 24-hr TSP in the reporting quarter.

5.1.2       According to the ContractoríŽs information, no noise complaint was received in the reporting quarter; hence, no Action Level exceedance was recorded.

5.1.3       No Limit Level exceedance of noise was recorded at monitoring station NM6 in the reporting quarter.

5.1.4       Cumulative statistics of exceedances is provided in Appendix G.

 


6             Complaint, Notification of Summons and Successful Prosecution

 

6.1          Summary of Complaints, Notification of Summons and Successful Prosecutions

6.1.1       Referring to the information provided by the Contractor, there was no complaint, notification of summons and successful prosecution received in the reporting quarter.

6.1.2       Table 6-1 summarized the complaint, summons and successful prosecution received in the reporting period.

Table 61          Summary of Environmental Complaints and Prosecutions

 

Sep 10

Oct 10

Nov 10

Total

Complaint Logged

0

0

0

0

Summons Served

0

0

0

0

Successful Prosecution

0

0

0

0

 

6.1.3       Cumulative Statistics of Exceedance, Complaints, Notification of Summons and Successful Prosecutions recorded in the reporting quarter and since the commencement of the Project are given in Appendix G.


7             Comments, Recommendations and Conclusions

 

7.1          Comments on Mitigation Measures

7.1.1       According to the environmental site inspections performed in the reporting quarter, the following comments are provided:

 

7.1.2       Air Quality Impact

íP            Tarpaulin sheet coverage should be provided to the soil stockpile placed within the works area in order to suppress fugitive dust emission.

 

7.1.3       Noise

íP            Nil.

 

7.1.4       Water Quality

íP            Wheel washing facilities provided within the works area should be properly maintained. Deposited silt inside the wheel washing bay should be cleared regularly.

íP            The Contractor should clear the deposited silt within the works area regularly in order to avoid generation of silty run-off during heavy rainstorm.

íP            Tarpaulin sheet coverage should be provided to the soil stockpile placed within the works area in order to avoid generation of silty run-off during rainstorm.

íP            Proper bunds/ sand bags/ channels should be provided at the site boundaries to avoid any surface run-off flowing outside the works area.

íP            All rainwater/run-off pumped out from the trenches should be properly treated by desilting facilities prior to discharge.

 

7.1.5       Chemical and Waste Management

íP            Housekeeping on site should be improved. C&D wastes accumulated at designated waste storage area should be removed off-site in a timely manner.

íP            All oil and chemical containers placed within site areas should be properly stored with provision of drip tray in order to retain any oil and chemical leakage. Regular inspection on the site condition should be conducted to ensure all oil drums and chemical containers are properly stored.

íP            Drip trays or temporarily with tarpaulin sheets should be provided when works with potential oil leakage (like oil filling) were carrying out within the works area.

íP            Regular inspections of machineries worked on site should be conducted to avoid any oil leakage from them. Proper measures (like provision of drip trays or temporarily with tarpaulin sheets) should be provided to avoid any oil spreading in case of oil leakage from machineries was noted. Any malfunction machineries should be repaired properly.

íP            Any oil mixed material, like oily liquid/slurry inside drip trays and oil stains, found within the works area should be cleared and disposed of properly as chemical wastes. Regular inspection on the site condition should be conducted to avoid any oily mixture accumulation within works area, especially after rainstorm.

 

7.1.6       Landscape and Visual Impact

íP            Proper tree protection measures should be provided to the existing trees located within the works area to avoid accidental damage of the existing trees by the works.

7.1.7       Others

íP            Nil.


7.2          Recommendations on EM&Amp;A Programme

7.2.1       The impact air quality and noise monitoring programme ensured that any environmental impact to the receivers would be readily detected and timely actions could be taken to rectify any non-compliance.  Assessment and analysis of monitoring results collected demonstrated the environmental acceptability of the Project. The monthly landscape and visual audit and weekly site inspection ensured that all the environmental mitigation measures recommended in the EIA final report were effectively implemented.

7.2.2       The EM&Amp;A programme, which include environmental monitoring of air quality, noise and landscape and visual impacts and environmental site inspections, effectively monitored the environmental impacts from the construction activities and no particular recommendation was advised for the improvement of the programme.

 

7.3          Conclusions

7.3.1       Air quality and noise monitoring and weekly site inspection were carried out from September 2010 to November 2010, in accordance with the EM&Amp;A Manual.

7.3.2       All 1-hour and 24-hour TSP monitoring results complied with the Action/Limit Level in the reporting quarter.

7.3.3       As per ContractoríŽs information, no Action Level exceedance of noise was recorded as complaints was recorded in the reporting quarter.

7.3.4       No Limit Level exceedance of noise was recorded at all monitoring station in the reporting quarter.

7.3.5       Three landscape and visual audit was carried out in the reporting quarter. Recommendations on remedial actions were given to the Contractor for the deficiencies identified during the landscape and visual audit.

7.3.6       Referring to the information given by the Contractor, no environmental complaint, summons or prosecution was made against the Project in the reporting quarter.

7.3.7       Environmental site inspections were carried out 14 times in the reporting period. Recommendations on remedial actions were given to the Contractor for the deficiencies identified during the site audit.