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Maeda Corporation

 

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Expansion of Shek Wu Hui Sewage

 

Treatment Works

 

 

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Sixth Quarterly EM&A Report

(Mar 07 – May 07)

 

June 2007

Report no: 01284R0492

 

 

 

 

Hyder Consulting Ltd

Incorporated in Hong Kong with limited liability—COI Number 126012

47th Floor, Hopewell Centre, 183 Queens Road East, Wanchai, Hong Kong

Tel: +852 2911 2233   Fax: +852 2805 5028   www.hyderconsulting.com

Joint Venture or Associate logo(s) —>

 

 

 


 

 

Maeda Corporation

 

Client logo(s) —>

 

 

 

Expansion of Shek Wu Hui Sewage

 

Treatment Works

 

 

Sixth Quarterly EM&A Report (Mar 07 – May 07)

 

Author:

Gigi Ho

 

Checker:

Alexi Bhanja

 

Approver:

Guiyi Li

 

 

Report no:

EA01284R0492

 

 

Date:

June 2007

 

 

 

 

 

 

Certified by Environmental Team Leader

Alexi Bhanja

 

This report has been prepared for  in accordance with the terms and conditions of Maeda Corporation appointment for the Expansion of Shek Wu Hui Sewage Treatment Works. Hyder Consulting Ltd (Incorporated in Hong Kong with limited liability—COI Number 126012) cannot accept any responsibility for any use of or reliance on the contents of this report by any third party.

 


Contents

1        Executive Summary............................................................................................................ 1

2        Introduction.......................................................................................................................... 2

2.1      Basic Information............................................................................................................. 2

2.2      Management Structure and Project Organisation............................................................. 2

2.3      Construction Programme................................................................................................. 2

2.4      Works Undertaken during the Reporting Quarter............................................................. 2

2.5      Status of Environmental Permit/ Licence........................................................................... 3

3        Environmental Status........................................................................................................ 3

3.1      Project and Work Area, Environmental Sensitive Receivers and Monitoring Locations.... 3

4        Brief Summary of EM&A Requirements...................................................................... 3

4.1      Monitoring Parameters.................................................................................................... 3

4.2      Action and Limit Levels.................................................................................................... 3

4.3      Event and Action Plans.................................................................................................... 4

4.4      Environmental Mitigation Measures and Requirements.................................................... 6

5        Implementation Status of Environmental Protection and Pollution Control/ Mitigation Measures      6

6        Monitoring Results............................................................................................................. 6

6.1      Graphical Plots of Monitoring Parameters........................................................................ 6

6.2      Factors Which Might Affect the Monitoring Results............................................................ 6

7        Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions           6

7.1      Non-compliance of Action and Limit Levels...................................................................... 6

7.2      Complaints Received....................................................................................................... 6

7.3      Notifications of Summons and Successful Prosecutions.................................................... 6

7.4      Review of the Reasons and Implications of Non-compliance, Complaints, Summons and Prosecutions   6

7.5      Site Inspections................................................................................................................ 6

8        Waste Management Status............................................................................................... 8

9        Comments, Recommendations and Conclusions.................................................. 9

 


List of Tables

Table 2-1            Key Personnel Contact Names and Telephone Number for the Project         2

Table 2-2            Status of Permit/Licence for the Project                                                           3

Table 4-3            Event/ Action Plan for Air Quality Monitoring                                                  5

Table 4-4            Event/ Action Plan for Noise Monitoring                                                         6

Table 7-5            Summaries of Site Inspections and Recommendations                                   8

Table 8-6            The Quantity of Waste Generation                                                                 8

 

List of Appendices

                         Appendix 1       Project Organization

                         Appendix 2       Construction Programme

                         Appendix 3      Location of Works

Appendix 4      Project Area, Environmental Sensitive Receiver and Monitoring Location

Appendix 5      Action and Limit Levels

Appendix 6      Environmental Requirement and Implementation Status

Appendix 7      Monitoring Results and Graphical Plots

Appendix 8       Cumulative Number of Complaint, Notification of Summon and Successful Prosecution

 


1                                Executive Summary

The expansion of Shek Wu Hui Sewage Treatment Works (SWHSTW) aims to increase the treatment capacity of the existing SWHSTW to cope with the increasing wastewater flows and loads as a result of the population growth in the catchment area of Fanling/Sheung Shui and the committed extension of sewerage system to unsewered areas.  It is considered as a project constituting a material change to an exempted designated project under Schedule 2 of EIAO.  Thus, the procedures under the EIAO have been followed and an Environmental Monitoring and Audit (EM&A) Programme has to be carried out.  The present report documents the outcomes of the EM&A Works undertaken between March and May 2007. 

Breaches of Action and Limit Levels

Noise

No non-compliance of action/limit level was recorded at all monitoring stations for noise during the reporting period. 

1-hr TSP

No non-compliance of action/limit level was recorded at all monitoring stations for 1-hr TSP during the reporting period.

24-hr TSP

No non-compliance of action/limit level was recorded at all monitoring stations for 24-hr TSP during the reporting period.

Complaints Log

During this reporting period, no environmental complaint was received. 

Notifications of Any Summons and Successful Prosecutions

During the reporting period, no notification of summons or successful prosecution was recorded.

Reporting Changes

There was no reporting change during the reporting period.

Future Key Issues

The construction activities for the coming three months will include excavation and backfilling, temporary work including sheet piling work, extraction and driving of sheet piles, installation of waling and struts, sub-structure and superstructure construction, pile head construction, pipe works, finishing work, water tightness test, steelwork and installation of Fiber Glass Reinforced Plastic installation, windows and doors.

 


2                                Introduction

2.1                         Basic Information

Shek Wu Hui Sewage Treatment Works (SWHSTW) provides treatment to the wastewater generated from Fanling/Sheung Shui areas before discharge it into Mai Po Inner Deep Bay Ramsar Site through River Indus and Shenzhen River, thus helps protecting the water quality of River Indus, Shenzhen River and Mai Po Inner Deep Bay Ramsar Site.  The expansion of SWHSTW aims to expand the treatment capacity of the existing SWHSTW to cope with the increasing wastewater flows and loads as a result of the population growth in the catchment area of Fanling/Sheung Shui and the committed extension of sewerage system to unsewered areas.

In accordance with Section 9(2)(g) of the Environmental Impact Assessment Ordinance (EIAO), the SWHSTW is an exempted designated project as the existing SWHSTW has been in operation before the EIAO came into effect on 1 April 1998.  However, since the proposed works involve physical expansion and alternation to the existing SWHSTW (hereafter called “the Project”) and may cause adverse environmental impacts if mitigation measures are not in place, it shall be considered as a project constituting a material change to an exempted designated project under Schedule 2 of EIAO.  Hence the procedures under the EIAO have been followed.  A Project Profile (PP) for direct application of the EP (Application No.DIR-121/2005) was approved by Environmental Protection Department (EPD) in May 2005 and an environmental permit (EP-218/2005) was obtained prior to the commencement of the expansion works.

Drainage Services Department (DSD) awarded the civil contract of the expansion of SWHSTW to Maeda Corporation (Maeda) in September 2005.  Maeda appointed Hyder Consulting Limited (HCL) as the Contractor’s Environmental Team (ET) during the construction period.  CH2M HILL Hong Kong Limited (formerly known as CH2M-IDC Hong Kong Limited) is the independent environmental checker (IEC).  The construction contract commenced in September 2005 and the total construction period is approximately 36 months.  The notified commencement date of work to the Director of EPD is 14 December 2005.

2.2                         Management Structure and Project Organisation

The Engineer (DSD) is responsible for overseeing the construction works and ensuring that they are undertaken by the Contractor (Maeda) in accordance with the specification and contractual requirements.  The Contractor shall report to the Engineer.  The ET is employed by the Contractor and is responsible for conducting the EM&A programme.  The IEC shall advise the Engineer on the environmental issues related to the Project.

The key personnel contact names and telephone number are summarised in Table 2-1.  The project organisation is shown in Appendix 1.

 

Party

Position

Name

Telephone number

Project Proponent - DSD

Project Manager

Raymond Lee

2594 7457

Engineer’s Representative

Tim Tsoi

2594 7460

Contractor - Maeda

Site Agent

George Cheung

9268 1918

ET - Hyder

ET Leader

Alexi Bhanja

2911 2916

IEC – CH2M HILL

IEC

Billy Yu

2872 2949

Table 2-1         Key Personnel Contact Names and Telephone Number for the Project

2.3                         Construction Programme

Construction programme of the Project is attached in Appendix 2.

2.4                         Works Undertaken during the Reporting Quarter

Works undertaken during the reporting period included:  

§            Excavation and backfilling;

§            Driving and extraction of sheet piles;

§            Pile head construction;

§            Substructure and superstructure construction;

§            Pipe laying;

§            Installation of Fiber Glass Reinforced Plastic hand railing, windows and doors; and

§            Finishing work.

2.5                         Status of Environmental Permit/ Licence

The status of the Environmental Permit/Licence for the Project is shown below.

Permit/Licence

Application Date

Date of issue

Ref. No.

Valid Until

Environmental Permit

21 May 2005

16 June 2005

EP-218/2005

N/A

Notification was made to EPD pursuant to Section 3(1) of the Air Pollution Control (Construction Dust) Regulation  (Form NA was submitted)

22 Sep 2005

N/A

N/A

N/A

Registration as a chemical waste producer

26 Sep 2005

4 Nov 2005

WPN: 5213-624-M2446-06

N/A

Effluent Discharge Licence

11 Nov 2005

20 Dec 2005

Licence No.: W5/1I287/1

19 Dec 2010

Application for Exemption Account for Disposal of Construction Waste

12 Dec 2005

Approved by EPD on 31 Dec 2005

Application No.: RN/00134

25 Sep 2008

Construction Noise Permit

10 Nov 2006

21 Nov 2006

GW-RN0574-06

31 May 2007

Table 2-2         Status of Permit/Licence for the Project

3                                Environmental Status

3.1                         Project and Work Area, Environmental Sensitive Receivers and Monitoring Locations

The site is located at the existing Shek Wu Hui Sewage Treatment Plant, next to Chuk Wan Street.  It has been subdivided into different Works Areas/Portions as illustrated in Appendix 3.  Project area, environmental sensitive receivers and monitoring locations are shown in Appendix 4.

4                                Brief Summary of EM&A Requirements

4.1                         Monitoring Parameters

4.1.1                  Air Quality

During the construction phase impact monitoring, 1-hour and 24-hour Total Suspended Particulates (TSP) levels should be measured at the selected air monitoring locations in accordance with the EM&A Manual.  These two parameters are aimed to indicate the impacts of construction dust on air quality. 

4.1.2                  Noise

The construction noise level should be measured in terms of the A-weighted equivalent continuous sound pressure level (Leq) for 30 minutes.  Leq(30 min)  is used as the monitoring parameter for the period between 0700 and 1900 hours on normal weekdays.  For all other time periods, three consecutive Leq(5min) are employed for comparison with the Noise Control Ordinance (NCO) criteria.

Other noise parameters such as L10 and L90 should also be obtained for reference. 

4.2                         Action and Limit Levels

4.2.1                  Air Quality

The baseline monitoring results documented in the Baseline Monitoring Report for the Project (our report ref.: EA01284R0012) form the basis for derivation of the Action and Limit Levels for air quality impact monitoring.  Appendix 5 shows the derived Action and Limit Levels for the Project.  If the air quality criteria are exceeded due to the Project, the Event/Action Plan summarised in Table 4-3 should be triggered immediately.

4.2.2                  Noise

The Action and Limit Levels for construction noise are defined in Appendix 5.  If valid non-compliance of the criteria occurs, actions in accordance with the Event and Action Plan in Table 4-4 should be implemented.  If construction works are undertaken during the restricted hours, a construction noise permit under NCO shall be obtained by the Contractor. 

4.3                         Event and Action Plans

The Event and Action Plans for air quality and noise monitoring are shown in Tables 4-3 and 4-4, respectively.


EVENT

ACTION

ET

IEC

ER

CONTRACTOR

ACTION LEVEL

Exceedance for one sample

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

·          Inform IEC and ER;

·          Repeat measurement to confirm finding.

·          Check monitoring data submitted by ET;

·          Check Contractor’s working method.

·          Notify Contractor.

·          Rectify any unacceptable practice;

·          Amend working methods if appropriate.

Exceedance for two or more consecutive samples

·          Identify source, investigate the cause of exceedance and propose remedial measures;

·          Inform IEC and ER;

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

·          Repeat measurements to confirm findings;

·          Increase monitoring frequency to daily;

·          Discuss with IEC and Contractor on remedial actions required;

·          If exceedance continues, arrange meeting with IEC and ER;

·          If exceedance stops, cease additional monitoring.

·          Check monitoring data submitted by ET;

·          Check Contractor’s working method;

·          Discuss with ET and Contractor on possible remedial measures;

·          Advise the ET on the effectiveness of the proposed remedial measures;

·          Supervise Implementation of remedial measures.

·          Confirm receipt of notification of exceedance in writing;

·          Notify Contractor;

·          Ensure remedial measures properly implemented.

 

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

·          Implement the agreed proposals;

·          Amend proposal if appropriate.

LIMIT LEVEL

Exceedance for one sample

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

·          Inform IEC, ER, Contractor and EPD;

·          Repeat measurement to confirm finding;

·          Increase monitoring frequency to daily;

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

·          If exceedance stops, cease additional monitoring.

·          Check monitoring data submitted by ET;

·          Check Contractor’s working method;

·          Discuss with ET and Contractor on possible remedial measures;

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

·          Supervise implementation of remedial measures.

·          Confirm receipt of notification of exceedance in writing;

·          Notify Contractor;

·          Ensure remedial measures properly implemented.

·          Take immediate action to avoid further exceedance;

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

·          Implement the agreed proposals;

·          Amend proposal if appropriate.

Exceedance for two or more consecutive samples

·          Notify IEC, ER, Contractor and EPD;

·          Identify source, investigate the cause of exceedance and propose remedial measures;

·          Repeat measurement to confirm findings;

·          Increase monitoring frequency to daily;

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

·          Arrange meeting with IEC and ER to discuss the remedial actions to be taken;

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

·          If exceedance stops, cease additional monitoring.

·          Discuss amongst ER, ET, and Contractor on the potential remedial actions;

·          Review Contractor’s remedial actions whenever necessary to assure their effectiveness and advise ER accordingly;

·          Supervise the implementation of remedial measures.

·          Confirm receipt of notification of exceedance in writing;

·          Notify Contractor;

·          In consultation with the IEC, agree with the Contractor on the remedial measures to be implemented;

·          Ensure remedial measures properly implemented;

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

·          Take immediate action to avoid further exceedance;

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

·          Implement the agreed proposals;

·          Resubmit proposals if problem still not under control;

·          Stop the relevant portion of works as determined by ER until the exceedance is abated.

Table 4-3          Event/ Action Plan for Air Quality Monitoring

 


EVENT

Action

ET

IEC

ER

CONTRACTOR

Action Level

·          Notify IEC and ER;

·          Carry out investigation;

·          Report the results of investigation to the IEC, ER and Contractors;

·          Discuss with the Contractor and formulate remedial measures;

·          Increase monitoring requrency to check mitigation effectiveness.

·          Review the analysed results submitted by the ET;

·          Review the proposed remedial measures by the Contractor and advise the ER accordingly;

·          Supervise the implementation of remedial measure.

·          Confirm receipt of notification of failure in writing;

·          Notify Contractor;

·          Require Contractor to propose remedial measures for the analysed noise problem;

·          Ensure remedial measures are properly implemented.

·          Submit noise mitigation proposal to IEC;

·          Implement noise mitigation proposals.

Limit Level

·          Identify source;

·          Inform IEC, ER, EPD and Contractor;

·          Repeat measurements to confirm findings;

·          Increase monitoring frequency to check mitigation effectiveness;

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

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

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

·          If exceedance stops, cease additional monitoring.

·          Discuss amongst ER, ET, and Contractor on the potential remedial actions;

·          Review Contractors remedial actions whenever necessary to assure their effectiveness and advise the ER accordingly;

·          Supervise the implementation of remedial measures.

·          Confirm receipt of notification of failure in writing;

·          Notify Contractor;

·          Require Contractor to propose remedial measures for the analysed noise problem;

·          Ensure remedial measures properly implemented;

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

·          Take immediate action to avoid further exceedance;

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

·          Implement the agreed proposals;

·          Resubmit proposals if problem still not under control;

·          Stop the relevant portion of works as determined by th ER until the exceedance is abated.

Table 4-4          Event/ Action Plan for Noise Monitoring

4.4                         Environmental Mitigation Measures and Requirements

The recommended measures for mitigating air quality, water quality, noise, waste and all other possible environmental impacts due to the construction works have been stated clearly in the EM&A Manual.  The details of the measures implemented by the Contractor are shown in Appendix 6.

5                                Implementation Status of Environmental Protection and Pollution Control/ Mitigation Measures

The status of the mitigation measures implemented by the Contractor is listed in Appendix 6. 

6                                Monitoring Results

6.1                         Graphical Plots of Monitoring Parameters

Graphical plots of the monitoring results are summarized in Appendix 7.

6.2                         Factors Which Might Affect the Monitoring Results

Dust from other sources such as roads with the movement of heavy vehicles in the vicinity of the monitoring stations would affect the air quality monitoring results. 

7                                Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions

7.1                         Non-compliance of Action and Limit Levels

No non-compliance of Action or Limit Level was recorded for air quality and noise monitoring. 

7.2                         Complaints Received

In case of an environmental complaint received, all related parties should follow the complaints response procedures specified in the EM&A Manual. 

During this reporting quarter, no environmental complaint was received.  Cumulative number of environmental complaint is shown in Appendix 8.

7.3                         Notifications of Summons and Successful Prosecutions

No notification of summons or successful prosecution was recorded during the reporting period.  The cumulative number of notifications of summons and successful prosecutions are shown in Appendix 8.

7.4                         Review of the Reasons and Implications of Non-compliance, Complaints, Summons and Prosecutions

7.4.1                  Non-compliance of Acton/Limit Level

No non-compliance was recorded during the reporting period.

7.4.2                  Complaints, Summons and Prosecutions

No complaints, summons and prosecutions were recorded during the reporting period.

7.5                         Site Inspections

Weekly site inspections have been carried out during the reporting period.  The findings of the site inspections and appropriate mitigation measures were recorded in the site inspection checklists.  The observations raised during the site inspections, corresponding recommendations and rectification status are summarised in Table 7-5.


 


Inspection Date

Deficiencies

Recommendation

Status

Note / Reminder

7 March 2007

1.   Stagnant water accumulated in the excavation trench at Portion 1 was observed.

1.       The Contractor was reminded to drain away the stagnant water.

1.       Improvement was observed on 14 March 2007.

N.A.

14 March 2007

1.  Water tube from silt removal facilities was damage.

1.      The Contractor was reminded to provide proper maintenance on the facilities.

1.    Improvement was observed on 21 March 2007.

N.A.

21 March 2007

1.   No measure was provided to prevent surface runoff from entering the existing gully near the transformer room.

1.      The Contractor was reminded to seal the gully and diver all surface runoff into silt removal facilities prior to discharge.

1.   Improvement was observed on 29 March 2007.

N.A.

29 March 2007

No environmental deficiency was observed.

N.A.

N.A.

N.A.

4 April 2007

No environmental deficiency was observed.

N.A.

N.A.

1.       Stagnant water accumulated around the Site after rainstorm was observed.  The Contractor was reminded to drain away the stagnant water via silt removal facilities.

12 April 2007

1.   Silty water accumulated near the WetSep at Portion 2 was observed.

1.      The Contractor was reminded to remove the silty water via silt removal facilities.

1. No silty water was observed during the site inspection on 18 April 2007.

N.A.

18 April 2007

No environmental deficiency was observed.

N.A.

N.A.

1.       Stagnant water accumulated around the Site after rainstorm was observed.  The Contractor was reminded to drain away the stagnant water via silt removal facilities or spray larvicide to prevent mosquito breeding.

25 April 2007

No environmental deficiency was observed.

N.A.

N.A.

1.       General refuse accumulated on site was observed.  The Contractor was reminded to provide sufficient rubbish bins on site and remove rubbish regularly.

2.       Standing water accumulated on the ground floor at ABH after washing of concrete surface was observed.  The Contractor was reminded to drain away the standing water to prevent mosquito breeding.

30 April 2007

No environmental deficiency was observed.

N.A.

N.A.

1.      The Contractor was reminded to drain away stagnant water or apply larvicide to stagnant water after rainstorm.

8 May 2007

1.   C&D wastes accumulated on site was observed.

1.       The Contractor was reminded to dispose of the C&D wastes accumulated on site properly.

1.       C&D waste at bio-reactor was cleaned up as observed on 16 May 2007.

1.       The Contractor was reminded to drain away the storm water on the rooftop of ABH.

16 May 2007

No environmental deficiency was observed.

N.A.

N.A.

1.       The Contractor was reminded to drain away the muddy water via silt removal facilities and clean up the remaining mud on the road. 

23 May 2007

No environmental deficiency was observed.

N.A.

N.A.

1.                                             The Contractor was reminded to drain away the storm water regularly after rainstorm. 

29 May 2007

No environmental deficiency was observed.

N.A.

N.A.

1.       The Contractor was reminded to remove standing water and water ponding after raining or cleaning, or provide larvicide to the water ponding on a regular basis.

2.       The Contractor was reminded to remove muddy water deposited on DSD public road inside the Site.

Table 7-5        Summaries of Site Inspections and Recommendations

EPD inspections were undertaken on 14 March and 30 May 2007 in the reporting period.  General inspection on site condition was conducted on both days.  No adverse comment was given.

8                                Waste Management Status

According to the information provided by the Contractor, Table 8-5 shows waste materials were generated during the reporting period.

Type of Waste

Mar 07

Apr 07

May 07

Inert C&D material (m3)

298.1

1336.4

1731.5

General Refuse (m3)

136.5

78.0

65.0

Chemical waste (L)

0

0

0

Table 8-6   The Quantity of Waste Generation

 

Inert C&D materials were disposed of at Tuen Mun Area 38 Public Fill.  General refuse was collected and disposed of at NENT Landfill.  No chemical waste was produced during the reporting period.  Trip ticket system was implemented and disposal records were in order on site.  The Waste Management Plan was followed.

9                                Comments, Recommendations and Conclusions

EM&A works have been undertaken between March and May 2007 for the Project based on the requirements set in the EM&A Manual. 

All monitoring equipments have been calibrated and all monitoring protocols have been carried out properly according to the EM&A Manual.

No valid exceedance of Action/Limit Level on air quality and noise was recorded during the reporting period. 

No compliant, notification of summons or successful prosecution was recorded during the reporting period. 

The overall EM&A programme is considered efficient during the reporting period and no material and technical changes are considered necessary. 



Appendix 1

Project Organization

 


Appendix 2

Construction Programme

Appendix 3

Works Area

 

 

 

 

 

 

 

 

 

 

 

Appendix 4

Project Area, Environmental Sensitive Receiver and Monitoring Location

 

 

 

 

 

 

 

 

 

 

 

Appendix 5

Action and Limit Levels

 

Appendix 6

Environmental Requirements and

Implementation Status

 

 

 

 

 

 

 

 

 

 

 

 

Appendix 7

Monitoring Results and Graphical Plots

 

 

 

 

 

 

 

 

 

 

 

Appendix 8

Cumulative Statistics of Complaint, Notification of Summons and Successful Prosecution