Maeda Corporation

 

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Expansion of Shek Wu Hui Sewage

Treatment Works

 

 

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Monthly EM&A Report No. 22

for September 2007

 

October 2007

Report no: 01284R0582

 

 

 

 

Hyder Consulting Ltd

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

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Expansion of Shek Wu Hui Sewage

Treatment Works

 

 

Monthly EM&A Report No. 22 for September 2007

 

Author:

Gigi Ho

 

Checker:

Alexi Bhanja

 

Approver:

Guiyi Li

 

 

Report no:

EA01284R0582

 

 

Date:

October 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 Month............................................................... 2

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

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

3.1      Works Undertaken during the Month with Illustrations...................................................... 3

3.2      Project 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      Monitoring Methodology.................................................................................................. 6

6.2      Name of Laboratory, Types of Equipment Used and Calibration Details.......................... 7

6.3      Parameters Monitored..................................................................................................... 8

6.4      Monitoring Locations........................................................................................................ 8

6.5      Monitoring Date, Time, Frequency and Duration, Weather Condition and Other Factors. 8

6.6      Results and Graphical Plots of Monitoring Parameters..................................................... 9

6.7      Factors Which Might Affect the Monitoring Results.......................................................... 10

6.8      QA/QC Results and Detection Limit................................................................................ 10

7        Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions           11

7.1      Non-compliance of Action and Limit Levels.................................................................... 11

7.2      Complaints Received..................................................................................................... 11

7.3      Notifications of Summons and Successful Prosecutions.................................................. 11

7.4      Review of the Reasons and Implications of Non-compliance, Complaints, Summons and Prosecutions   11

7.5      Site Inspection............................................................................................................... 11

8        Waste Management Status............................................................................................. 12

9        Future Key Issues............................................................................................................. 12

10      Comments, Recommendations and Conclusions................................................ 12

 


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 6-5            Monitoring Equipment                                                                                    8

Table 6-6            Air Quality Monitoring Locations                                                                     8

Table 6-7            Noise Monitoring Locations                                                                            8

Table 6-8            Sampling Schedule of Air Quality Monitoring                                                  9

Table 6-9            Sampling Schedule of Noise Monitoring                                                         9

Table 6-10           Air Quality Monitoring Results                                                                      10

Table 6-11           Noise Monitoring Results                                                                             10

Table 7-12           Summaries of Site Inspections and Recommendations                                 12

 

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      Calibration Records

Appendix 8      Monitoring Results and Graphical Plots

Appendix 9       QA/QC Results and Detection Limit

Appendix 10     Cumulative Number of Complaint, Notification of Summon and Successful Prosecution

Appendix 11    Upcoming EM&A Schedule

 


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 during September 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 month.

1-hr TSP

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

24-hr TSP

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

Complaints Log

During this reporting month, no environmental complaint was received. 

Notifications of Any Summons and Successful Prosecutions

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

Reporting Changes

There was no reporting change during the reporting month.

Future Key Issues

The construction activities for the coming three months will include excavation and backfilling, temporary work including installation of waling and struts, driving and extraction of sheet piles, pile head construction, sub-structure and superstructure construction, pipe works, cable ducts installation, finishing work, Water Tightness Test, installation of cat ladder.

 


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 specifications 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 Month

Works undertaken during the reporting month included:

§            Excavation and backfilling;

§            Driving of sheet piles and extraction of sheet piles;

§            Substructure and superstructure construction;

§            Pipe laying;

§            Installation of chequer plates and false ceiling;

§            Water Tightness Test; 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

End of Project

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

End of Project

Registration as a chemical waste producer

26 Sep 2005

4 Nov 2005

WPN: 5213-624-M2446-06

End of Project

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 May 2007

23 May 2007

GW-RN0224-07

30 Nov 2007

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

3                                Environmental Status

3.1                         Works Undertaken during the Month with Illustrations

The site has been subdivided into different Works Areas/Portions as illustrated in Appendix 3.  Substructure works, superstructure construction and Water Tightness Test were undertaken in Portions 1 & 2.  Driving and extraction of sheet piles, pipe laying, excavation and backfilling were undertaken in Portions 1 to 3.  Chequer plates and false ceiling installation were undertaken in Portion 3. Finishing work was undertaken in Portions 2 and 3.

3.2                         Project 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.  The 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 frequency 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 the 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                         Monitoring Methodology

6.1.1                  Air Quality

1-hr and 24-hr TSP monitoring works were undertaken by the ET using high volume samplers (HVS).  The sampling procedures followed the standard sampling method as set out in High Volume Method for Total Suspended Particulates, Part 50 Chapter 1 Appendix B, Title 40 of the Code of Federal Regulations of the USEPA.

During the sampling, dust laden air was drawn through a HVS fitted with a conditioned, pre-weighted filter paper, at a controlled rate.  After sampling for 1 hour and 24 hours, the filter paper with retained particles was collected and returned to the laboratory for drying in a desiccator followed by accurate weighing.  Respective 1-hour and 24-hour TSP levels were calculated from the ratio of the mass of particulates retained on the filter paper to the total volume of air sampled.

The HVSs were equipped with an electronic mass flow controller and calibrated against a traceable standard at regular intervals.  All equipment, calibration kit and filter papers were clearly labelled. 

The sampling procedures and specifications were the same for 1-hour and 24-hour baseline air quality monitoring except the sampling duration.  The specifications were as follows:

§         0.6-1.7 m3/min (20-60SCFM);

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

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

§         Capable of providing a minimum exposed area of 406 cm2 (63in2);

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

§         Equipped with a shelter to protect the filter and sampler;

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

§         Equipped with a flow recorder for continuous monitoring;

§         Provided with a peaked roof inlet;

§         Incorporated with a manometer;

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

§         Easy to change the filter; and

§         Capable of operating continuously for a 24-hour period.

 

Relevant environmental data including temperature, pressure, weather conditions, elapsed-time meter reading for the start and stop of the sampler, identification and weight of the filter paper, and other special phenomena observed and work progress of the concerned site were also recorded. 

Filter papers of size 8"x10" were labelled before sampling.  They were inspected clean with no pin holes and conditioned in a humidity-controlled chamber for over 24-hr and be pre-weighed before use for the sampling. 

After sampling, the filter papers loaded with dust were kept in a clean and tightly sealed plastic bag, and then returned for reconditioning in the humidity controlled chamber followed by accurate weighing by an electronic balance with a readout down to 0.1 mg.  All the collected samples would be kept in a good condition for 6 months before disposal.

The weight of filter paper was measured by a HOKLAS accredited laboratory. 

6.1.2                  Noise

Weatherproof logging sound level meters which comply with the International Electrotechnical Commission Publication 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications were used to measure the construction noise at the designated monitoring locations.  Noise parameters of the A-weighted levels Leq, L10 and L90 were measured with a sampling period of 5 minutes throughout the monitoring.  The average of six consecutive 5-minute readings was used to provide Leq(30 minutes) for non-restricted hours.  A facade correction of 3dB(A) would be applied to all free field measurements.

During the impact monitoring, information such as date, weather condition, equipment used, measurement results and major noise sources were recorded on the field data record sheet.  Noise measurements would not be made in fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s.  The wind speed would be checked with a portable wind speed meter capable of measuring wind speed in m/s.  All measurements were recorded to the nearest 0.1dB(A).

6.2                         Name of Laboratory, Types of Equipment Used and Calibration Details

6.2.1                  Name of Laboratory

Filter papers used for air quality monitoring were sent to ALS Environmental, a HOKLAS accredited laboratory, for weighing.  Other sampling and analytical works were conducted by Hyder Consulting Limited, the ET.

6.2.2                  Types of Equipment Used and Calibration Details

HVS - Model GBM2000H1, manufactured by Anderson Instruments Inc., was used for TSP monitoring.  It complies with the USEPA specifications in Appendix B Part 50 - Reference Method for the Determination of Suspended Particulate matter in the Atmosphere (High-Volume Method) of the Code of Federal Regulation dated July 1, 1991.  Initial calibration of dust monitoring equipment was conducted upon installation and prior to commissioning.  One point flow rate calibration would be carried out every two months.  Five-point calibration would be carried out every six months.  All the calibration data were converted into standard temperature and pressure condition.

Orific HVS Calibration Kit model G2523 was used for the calibration of HVSs.  Calibration of calibration kit would be carried out annually.  Appendix 7 presents the monitoring equipment calibration records.

For noise monitoring, Bruel & Kjaer (B&K) Precision Integrating Sound Level Meters of Type 2238 in compliance with the International Electrotechnical Commission Publication 651: 1979 (Type 1) and 804: 1985 (Type 1) Specifications were used.

Prior to and following each noise measurement, the accuracy of the sound level meter was checked using an acoustic calibrator (B&K Type 4230) generating a known sound pressure level at a known frequency.  Measurements were considered as valid only if the calibration level from before and after the noise measurement agree to within 1dB.  All sound level meters and calibrators would be calibrated annually.  Appendix 7 presents the monitoring equipment calibration records.

Table 6-5 summarises the types of monitoring and calibration equipment.


 


Equipment Type

Manufacturer

Model

Serial Number/I.D.

Sound Level Meter

B&K

Type 2236

1785701

Sound Level Calibrator

B&K

Type 4231

1770806

High Volume Sampler

Anderson

GBM 2000 H1

1097

High Volume Sampler

Anderson

GBM 2000 H1

1062

Orific HVS Calibration Kit

Tisch Environmental

G2523

517N

                         Table 6-5        Monitoring Equipment

6.3                         Parameters Monitored

Parameters monitored are described in Sections 4.1.1 and 4.1.2. 

6.4                         Monitoring Locations

There are two designated air quality monitoring locations identified in the EM&A Manual.  Due to the access constraint, alternative monitoring locations were selected and approved by ER, IEC and EPD prior the commencement of monitoring.  These alternative locations for air quality monitoring are summarised in Table 6-6 and shown in Appendix 4. 

Monitoring Station ID

Name of Premises

Monitoring Location

CAM1a

San Po Street Pumping Station

Ground floor level

CAM2a

Sheung Shui Heung Floodwater Pumping Station

Ground floor level

Table 6-6        Air Quality Monitoring Locations

 

There are two designated noise monitoring locations identified in the EM&A Manual and their locations are described below and shown in Appendix 4.

Monitoring Station ID

Name of Premises

Monitoring Location

NM1

Wai Loi Tsuen

1.2m above ground

NM2

Temporary Domestic Structure

1.2m above ground

Table 6-7        Noise Monitoring Locations

6.5                         Monitoring Date, Time, Frequency and Duration, Weather Condition and Other Factors

Monitoring frequency for 1-hr TSP and 24-hr TSP is 3 times every 6 days and once every 6 days, respectively.  One set of noise measurements will be conducted between 0700 and 1900 on normal weekdays at each monitoring station on a weekly basis, when noise-generating activities are underway.  Monitoring date, time and duration for noise and air quality monitoring and all other factors related to the monitoring result, such as weather condition, are listed in the following tables.

Station

Date

Time

Duration

Weather Condition

1-hr TSP

CAM1a

01-Sept-2007

1215-1511

3 X 1 hour

Fine

07-Sept-2007

1041-1332

3 X 1 hour

Fine

13-Sept-2007

1125-1413

3 X 1 hour

Sunny

19-Sept-2007

1114-401

3 X 1 hour

Sunny

25-Sept-2007

1210-1458

3 X 1 hour

Fine

29-Sept-2007

1322-1610

3 X 1 hour

Sunny

CAM2a

01-Sept-2007

1224-1517

3 X 1 hour

Fine

07-Sept-2007

1049-1340

3 X 1 hour

Fine

13-Sept-2007

1131-1420

3 X 1 hour

Sunny

19-Sept-2007

1122-1407

3 X 1 hour

Sunny

25-Sept-2007

1215-1504

3 X 1 hour

Fine

29-Sept-2007

1329-1619

3 X 1 hour

Sunny

24-hr TSP

CAM1a

01-Sept-2007

1511-1511

24 hours

Fine

07-Sept-2007

1332-1332

24 hours

Fine

13-Sept-2007

1413-1413

24 hours

Sunny

19-Sept-2007

1401-1401

24 hours

Sunny

25-Sept-2007

1458-1458

24 hours

Fine

29-Sept-2007

1610-1610

24 hours

Sunny

CAM2a

01-Sept-2007

1517-1517

24 hours

Fine

07-Sept-2007

1340-1340

24 hours

Fine

13-Sept-2007

1420-1420

24 hours

Sunny

19-Sept-2007

1407-1407

24 hours

Sunny

25-Sept-2007

1504-1504

24 hours

Fine

29-Sept-2007

1619-1619

24 hours

Sunny

Table 6-8         Sampling Schedule of Air Quality Monitoring

 

Station

Date

Time

Duration

Weather Condition

NM1

07-Sept-2007

1100-1130

30 minutes

Sunny

13-Sept-2007

0930-1000

30 minutes

Sunny

19-Sept-2007

1130-1200

30 minutes

Sunny

25-Sept-2007

1330-1400

30 minutes

Sunny

NM2

07-Sept-2007

0930-1000

30 minutes

Sunny

13-Sept-2007

1030-1100

30 minutes

Sunny

19-Sept-2007

0930-1000

30 minutes

Sunny

25-Sept-2007

1430-1500

30 minutes

Sunny

Table 6-9         Sampling Schedule of Noise Monitoring

6.6                         Results and Graphical Plots of Monitoring Parameters

Air quality monitoring results of 1-hour and 24-hour TSP levels are summarised in Table 6-10 and detailed in Appendix 8.  Graphical plots of the monitoring results are also provided in Appendix 8.

Station

Date

Measured Level (mg/m3)

Action/Limit Level (mg/m3)

1-hr TSP

24-hr TSP

1-hr TSP

24-hr TSP

CAM1a

3 September 2007

51.2

47.9

342.7/500

203.3/260

31.7

46.9

7 September 2007

110.8

99.1

84.7

115.9

13 September 2007

107.1

147.5

69.0

93.5

19 September 2007

243.4

201.6

177.1

156.8

25 September 2007

127.6

53.9

40.8

36.6

29 September 2007

14.5

96.2

36.9

17.9

CAM2a

3 September 2007

14.5

41.0

340.2/500

201.6/260

36.9

17.9

7 September 2007

108.9

93.4

96.6

90.2

13 September 2007

134.8

160.0

84.6

72.9

19 September 2007

276.0

122.2

215.8

157.6

25 September 2007

47.2

46.7

32.6

17.9

29 September 2007

46.3

98.4

82.6

116.1

Note:

(1)     “Shading” indicates an exceedance of Action Level.  “Bold and shading” indicates an exceedance of Limit Level.

Table 6-10       Air Quality Monitoring Results

 

Noise monitoring results are summarised in Table 6-11 and detailed in Appendix 8.  Graphical plots of the monitoring results are also provided in Appendix 8.  As all monitoring was conducted at free field condition, a facade correction of 3dB(A) was applied to each of the noise measurements.


Station

Date

Measured Noise Level, dB(A)

Limit Level for

Leq(30 min), dB(A)

Leq (30min)

L10(30min)

L90(30min)

NM1

07-Sept-2007

60.6

62.9

57.1

75

13-Sept-2007

60.1

62.8

57.7

19-Sept-2007

58.7

59.8

52.3

25-Sept-2007

60.7

63.2

58.1

NM2

07-Sept-2007

53.8

55.5

50.9

13-Sept-2007

54.8

57.3

51.6

19-Sept-2007

53.8

57.5

50.4

25-Sept-2007

53.6

55.6

49.9

Note :  (1) Shaded area indicates an exceedance of Limit Level.

(2) A facade correction of 3dB(A) was applied to each of noise measurements.

Table 6-11       Noise Monitoring Results

6.7                         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. 

6.8                         QA/QC Results and Detection Limit

The quality assurance (QA) / quality control (QC) results and detection limit are shown in Appendix 9.

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 month, no environmental complaint was received.  Cumulative number of environmental complaint is shown in Appendix 10.

7.3                         Notifications of Summons and Successful Prosecutions

No notification of summons or successful prosecution was recorded during the reporting month.  The cumulative number of notifications of summons and successful prosecutions are shown in Appendix 10.

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 Inspection

Weekly site inspections were carried out on 5, 12, 19 and 25 September 2007.  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 7-12. 


Inspection Date

Deficiencies

Recommendation

Status

Note / Reminder

5 September 2007

No environmental deficiency was observed.

N.A.

N.A.

1.  The Contractor was reminded remove standing water accumulated on the drip tray near the site office.

12 September 2007

No environmental deficiency was observed.

N.A.

N.A.

1.                                              The Contractor was reminded to replace the broken sandbags around the wastewater discharge point to prevent surface runoff from direct flowing into manholes. 

2.                                              The Contractor was reminded to dispose of general refuse and C&D waste regularly.

19 September 2007

No environmental deficiency was observed.

N.A.

N.A.

1.    The Contractor was reminded to divert groundwater and surface runoff to silt removal facilities prior to discharge and maintain sedimentation tank in good operating condition.

2.    The Contractor was reminded to replace broken sandbags that cover manholes.

25 September 2007

No environmental deficiency was observed.

N.A.

N.A.

1.  The Contractor was reminded to remove standing water around the sedimentation tank after rain and also inspect and maintain the silt removal facilities on a regular basis.

2.  The Contractor was reminded to provide drip trays to oil containers.

Table 7-12       Summaries of Site Inspections and Recommendations

 

The site audit conducted by IEC was carried out on 25 September 2007 and the Contractor has undertaken appropriate actions in response to the IEC’s findings. 

No EPD inspection was undertaken in the reporting month.  There was no outstanding issue or deficiency for the observations arising during the weekly site inspections. 

8                                Waste Management Status

According to the information provided by the Contractor, the following waste materials were generated during the reporting month: 

§            Inert C&D materials – 1326.45 m3, and

§            General Refuse – 58.5 m3.

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

9                                Future Key Issues

The construction activities for the coming three months are summarized below:

§            Excavation and backfilling;

§            Installation of waling and struts;

§            Driving of sheet piles and extraction of sheet piles;

§            Pile head construction;

§            Substructure and superstructure construction;

§            Pipe laying;

§            Cable ducts installation;

§            Installation of cat ladder;

§            Water Tightness Test; and

§            Finishing work.

 

The upcoming EM&A schedule for the future three months is shown in Appendix 11.

10                          Comments, Recommendations and Conclusions

EM&A works have been undertaken during September 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 was recorded during the reporting month. 

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

Four weekly site inspections were carried out during the reporting month.  In response to the observations raised by ET, the Contractor has undertaken follow-up actions to rectify the condition. 



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 Requirements and

Implementation Status

 

 

 

 

 

 

 

 

 

 

 

Appendix 7

Calibration Records

 

 

 

 

 

 

 

 

 

 

 

Appendix 8

Monitoring Results and Graphical Plots

 

 

 

 

 

 

 

 

 

 

 

Appendix 9

QA/QC Results and Detection Limit

Appendix 10

Cumulative Statistics of Complaint, Notification of Summons and Successful Prosecution

 

 

 

 

 

 

 

 

 

 

 

Appendix 11

Upcoming EM&A Schedule