TABLE OF CONTENTS

 

EXECUTIVE SUMMARY.. 1

Introduction. 1

Summary of Main Works Undertaken and Key Measures Implemented. 1

Summary of Exceedances, Investigation and Follow-up. 2

Complaint Handling, Prosecution and Public Engagement 3

Reporting Changes. 3

Future Key Issues. 4

1 INTRODUCTION.. 5

Background. 5

Project Organizations. 5

Construction Activities Undertaken During the Reporting Quarter 6

2 ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS. 8

Monitoring Parameters and Monitoring Locations. 8

Environmental Quality Performance Limits (Action and Limit Levels) 8

Monitoring Methodology. 8

Implementation Status of Environmental Mitigation Measures. 8

Site Audit Summary. 8

Status of Waste Management 8

3 MONITORING RESULTS. 9

Weather Conditions. 9

Air Quality. 9

Construction Noise. 9

Ecology. 9

Water Quality. 9

Waste Management 9

Landscape and Visual 10

Influencing Factors on the Monitoring Results. 10

4 NON-COMPLIANCE (EXCEEDANCES) OF THE ENVIRONMENTAL QUALITY PERFORMANCE LIMITS (ACTION AND LIMIT LEVELS) 11

Summary of Exceedances. 11

Review of the Reasons for and the Implications of Non-compliance. 11

Summary of Complaint, Warning, Notification of Any Summons and Successful Prosecution. 11

5 COMMENTS, CONCLUSIONS AND RECOMMENDATIONS. 12

Review of Monitoring Methodology and the Practicality and Effectiveness of EM&A Programme. 12

Review on Effectiveness of Mitigation Measures. 12

Recommendations. 13

 


 

LIST OF TABLES

Table I Summary Table for Major Site Activities in the Reporting Quarter

Table II Non-compliance Record for the Project in the Reporting Quarter

Table III Summary Table of Complaints, Summons, Prosecutions and Public Engagement Activities in the Reporting Quarter

Table IV Summary Table for Site Activities in the Next Reporting Period

Table 1.1 Key Project Contacts

Table 1.2 Summary Table for Major Site Activities in the Reporting Quarter

Table 3.1 Major Dust Sources during the Monitoring in the Reporting Quarter

Table 3.2 Major Noise Sources during the Monitoring in the Reporting Quarter

Table 3.3 Observations during Ecological Monitoring in the Reporting Quarter

 

 

 

 

lIST OF FIGUREs

Figure 1.1 Layout Plan of the Project Site

Figure 1.2 Project Organisation for Environmental Monitoring and Audit

Figure 2 Locations of Air Quality Monitoring Stations

Figure 3 Locations of Construction Noise Monitoring Stations

Figure 4 Survey Location for Impact Ecological Monitoring

 

 

 

 

LIST OF APPENDICES

Appendix A Construction Programme

Appendix B Monitoring Requirements

Appendix C Action and Limit Levels

Appendix D Environmental Mitigation Implementation Schedule (EMIS)

Appendix E Site Audit Summary

Appendix F Waste Flow Table

Appendix G Graphical Presentations of Air Quality Monitoring Results (1-hour)

Appendix H Graphical Presentations of Air Quality Monitoring Results (24-hour)

Appendix I Graphical Presentations of Noise Monitoring Results

Appendix J Summary of Ecological Monitoring Analysis

Appendix K Summary of Exceedances

Appendix L Summaries of Environmental Complaint, Warning, Summon and Notification of Successful Prosecution

 

 


EXECUTIVE SUMMARY

Introduction

1.      This is the 5th Quarterly Environmental Monitoring and Audit (EM&A) Summary Report prepared by the Environmental Team, Cinotech Consultants Ltd., for Agreement No. SPW 07/2019 Shek Wu Hui Effluent Polishing Plant Main Works Stage 1 (hereinafter called the Project). This report summarized the monitoring results and audits findings of the EM&A programme under the issued further EP No. FEP-02/474/2013 and in accordance with the Updated EM&A Manual conducted between 1st January 2021 and 31st March 2021.

Summary of Main Works Undertaken and Key Measures Implemented

2.      The construction activities undertaken in the reporting quarter were as follows:

Table I Summary Table for Major Site Activities in the Reporting Quarter

Contract No.

Contract Title

Site Activities

DC/2018/06

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Civil Works for Sludge Treatment Facilities and 132kV Primary Substation

       ELS and excavation works

       Sheet pile installation

       RC works

      Plate load test

       Strut installation and blinding layer

      Pipe jacking work

DC/2018/07

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Civil Works for Sewage Treatment Facilities

      ELS and construction of inlet reception chamber

      Trench excavation

      Road and drainage works

      Diversion of inlet works

      Process pipe of CHR and CHS

      Pre-drilling work and foundation work

      Pre-bored H piles

      Cable diversion works

      Alternation of existing powerhouse

      Demolition work of existing main facilities

      Piling load test

DE/2018/03

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Sidestream Treatment Facilities and E&M Works for Sluge Treatment Faciliteis

      Ground investigation in Portion B-1

      Settlement monitoring works

      Pre-drill works at Portion B-1

DE/2018/04

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - E&M Works for Sewage Treatment Facilities

      Construction of temporary filtrate equalisation tank.

      Installation of temporary primary sludge thickener and its accessories

      Dismantle and removal of E&M equipment of the existing primary sedimentation tank no. 4 and 6

 

3.      Implementation of the key mitigation measures during the reporting period are as follows:

 

Air Quality

         Stockpiles were covered by impervious sheets.

         Water spraying on haul road was done to minimize dust generation.

 

Water Quality

         Wastewater was removed, pumped and collected in the sedimentation tank before discharge.

 

Waste Management

         Chemicals were stored in drip trays properly.

         Unused waste and materials were removed to maintain the tidiness of the site.

Summary of Exceedances, Investigation and Follow-up

4.      Exceedance of Action/Limit levels between January and March 2021 and summary of the non-compliance in the reporting quarter for the Project is tabulated in Table II.

Table II Non-compliance Record for the Project in the Reporting Quarter

Parameter

No. of Exceedance

Investigation Result

Action Level

Limit Level

January 2021

Air Quality (1-hour TSP)

0

0

N/A

Air Quality (24-hour TSP)

0

0

N/A

Noise

0

0

N/A

Ecology

0

0

N/A

February 2021

Air Quality (1-hour TSP)

0

0

N/A

Air Quality (24-hour TSP)

0

0

N/A

Noise

0

0

N/A

Ecology

0

1

Non-project related

March 2021

Air Quality (1-hour TSP)

0

0

N/A

Air Quality (24-hour TSP)

0

0

N/A

Noise

0

0

N/A

Ecology

0

1

Non-project related

5.      No exceedance was recorded at any air quality monitoring station during the reporting period.

6.      No exceedance was recorded at any noise monitoring station during the reporting period.

7.      No Action Level and 2 Limit Levels were triggered for ecological monitoring during the reporting period.

Complaint Handling, Prosecution and Public Engagement

8.      Summary of complaint handling, prosecution and public engagement in the reporting quarter is tabulated in Table III.

Table III Summary Table of Complaints, Summons, Prosecutions and Public Engagement Activities in the Reporting Quarter

Event

Event Details

Follow-up/ Remedial Actions

Status/ Remarks

Number

Brief Description

Complaints Received

1

Significant odour nuisance was suspected to be emitted from the construction activities of SWHEPP

      Ensured only PMEs with valid NRMM label were used on-site

      Conducted regular visual checking against emission quality of exhaust pipe of equipment by using the Ringlemann Chart

      Used ULSD for diesel-powered equipment

      Provided water spraying and water sprinklers system for haul road access and demolition works

      Used battery powered solution to provide power to the tower crane

      Provided cover for all rubbish bins on-site

      Separated general refuse from construction waste

     Complaint Investigation Report (CIR) was submitted in March 2021

     The complaint was considered as non-project related as no significant dust emission was observed and the mitigation measures for air quality and chemical/waste management were properly implemented on-site

Notification of Summons and Prosecutions Received

0

-

-

-

Public Engagement Activities

0

-

-

-

Reporting Changes

9.      There were no reporting changes during the reporting quarter.

Future Key Issues

10.  The key works or activities will be anticipated in the next reporting period are as follows:

Table IV Summary Table for Site Activities in the Next Reporting Period

Contract No.

Contract Title

Site Activities

DC/2018/06

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Civil Works for Sludge Treatment Facilities and 132kV Primary Substation

      ELS and excavation works

      Sheet pile installation

      RC works

      Strut installation and blinding layer

      Pipe jacking work

DC/2018/07

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Civil Works for Sewage Treatment Facilities

      ELS and construction of inlet reception chamber

       Trench excavation

       Road and drainage works

       Diversion of inlet works

       Process pipe of CHR and CHS

       Pre-drilling work and foundation work

       Cable diversion works

      Demolition work of existing main facilities

       Alternation of existing powerhouse

      Pre-bored H piles

DE/2018/03

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Sidestream Treatment Facilities and E&M Works for Sluge Treatment Faciliteis

      Break concrete pavement and ramp

      Construct sump pit and curb

      Relocate container includes, remove shrubs and laying blinding

      Setup of piling works, mobilization of plant and equipment

      Start pilling works

      Socket H pilling

DE/2018/04

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - E&M Works for Sewage Treatment Facilities

      Installation of temporary filtrate equalisation tank.

      Installation of temporary primary sludge thickener and its accessories

      Retrofitting the existing primary sedimentation tank No. 4 and 6

      Preparatory work for electrical installation at inlet works

 

 

1              INTRODUCTION

Background

1.1         The Further Expansion of Shek Wu Hui Effluent Polishing Plant (SWHEPP) is a designated Project (DP) under F.1 and F.2 of Part 1, Schedule 2 of Environmental Impact Assessment Ordinance (EIAO). The North East New Territories New Development Areas Environmental Impact Assessment (NENT NDAs EIA) Report (Registered No.: AEIAR-175/2013) covered the assessment for the Further Expansion of SWHSTW Phase 1A, 1B and 2, and the associated Environmental Monitoring and Audit (EM&A) Manual was approved on 18 October 2013.

1.2         The existing Shek Wu Hui Sewage Treatment Works (SWHSTW) is operated and maintained by the Drainage Services Department (DSD). It provides secondary level treatment to sewage collected from Sheung Shui, Fanling and adjacent areas, SWHSTW was completed in two stages and expanded progressively in the past year. In 2009, the expansion of SWHSTW was completed and its design capacity was 93,000m2/day at average dry weather flow (ADWF). After the Resource Allocation Exercise 2017, the existing SWHSTW is proposed to be upgraded from secondary to tertiary treatment level as the new SWHEPP at 3 stages: Main Works Stage 1, Stage 2 and Stage 3.

1.3         A Further Environmental Permit (EP) (Permit No. FEP-02/474/2013) was issued on 15 February 2018 to DSD as the Permit Holder to assume the responsibility for construction and operating the SWHEPP Project up to a capacity of 190,000m3/day. The updated Environmental Monitoring and Audit (EM&A) Manual was prepared in accordance with Condition 2.3 of the Further EP. The site layout plan for the Project is shown in Figure 1.1.

1.4         Cinotech Consultants Ltd. was designated as the Environmental Team (ET) to undertake the Environmental Monitoring and Audit (EM&A) works for the Project. The construction commencement of the Project was on 3rd January 2020. This is the 5th Quarterly EM&A Summary Report summarizing the EM&A works for the Project between 1st January 2021 and 31st March 2021.

Project Organizations

1.5         Different Parties with different levels of involvement in the project organization include:

         Permit Holder/Project Proponent Drainage Services Department (DSD)

         Supervisor Representative AECOM Asia Company Limited (AECOM)

         Environmental Team (ET) Cinotech Consultants Limited (Cinotech)

         Independent Environmental Checker (IEC) Ramboll Hong Kong Limited (Ramboll)

         Contractors

o  Contract No.: DC/2018/06 - Kwan Lee - Chun Wo Joint Venture (KLCWJV)

o  Contract No.: DC/2018/07 - Kwan Lee - Chun Wo Joint Venture (KLCWJV)

o  Contract No.: DE/2018/03 - Jardine Engineering Corporation Limited (JEC)

o  Contract No.: DE/2018/04 - Bestwise Envirotech Limited (Bestwise)

1.6         The key contacts of the Project are shown in Table 1.1.

Table 1.1 Key Project Contacts

Party

Role

Contact Person

Phone No.

DSD

Permit Holder / Project Proponent

Ms. Konica Cheung

2594 7463

Public Enquiry

3142 2256

AECOM

Supervisor Representative

Mr. Henry Tai

3792 0580

Cinotech

Environmental Team

Mr. KS Lee (ETL)

2151 2091

Ms. Betty Choi

2151 2072

Ramboll

Independent Environmental Checker

Mr. Manson Yeung

3465 2888

KLCWJV

Contractor (DC/2018/06)

Ms. Ruby Hui

6218 6408

KLCWJV

Contractor (DC/2018/07)

Mr. Jimmy Cheng

9606 5916

JEC

Contractor (DE/2018/03)

Ms. Juliet Ting

6826 7319

Bestwise

Contractor (DE/2018/04)

Mr. Albus Cheung

9731 0831

1.7         The Organizational Structure for Environmental Management is shown in Figure 1.2.

Construction Activities Undertaken During the Reporting Quarter

1.8         The construction programme is presented in Appendix A. The major site activities undertaken in the reporting quarter were:

Table 1.2 Summary Table for Major Site Activities in the Reporting Quarter

Contract No.

Contract Title

Site Activities

DC/2018/06

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Civil Works for Sludge Treatment Facilities and 132kV Primary Substation

       ELS and excavation works

       Sheet pile installation

       RC works

      Plate load test

       Strut installation and blinding layer

      Pipe jacking work

DC/2018/07

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Civil Works for Sewage Treatment Facilities

      ELS and construction of inlet reception chamber

      Trench excavation

      Road and drainage works

      Diversion of inlet works

      Process pipe of CHR and CHS

      Pre-drilling work and foundation work

      Pre-bored H piles

      Cable diversion works

      Alternation of existing powerhouse

      Demolition work of existing main facilities

      Piling load test

DE/2018/03

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - Sidestream Treatment Facilities and E&M Works for Sluge Treatment Faciliteis

      Ground investigation in Portion B-1

      Settlement monitoring works

      Pre-drill works at Portion B-1

DE/2018/04

Shek Wu Hui Effluent Polishing Plant - Main Works Stage 1 - E&M Works for Sewage Treatment Facilities

      Construction of temporary filtrate equalisation tank.

      Installation of temporary primary sludge thickener and its accessories

      Dismantle and removal of E&M equipment of the existing primary sedimentation tank no. 4 and 6


2              ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS

Monitoring Parameters and Monitoring Locations

2.1         The Updated EM&A Manual designates locations for the ET to monitor environmental impacts in terms of air quality, noise and ecology due to the Project. The Project area and monitoring locations are depicted in Figures 2-4. Appendix B gives details of monitoring requirements.

Environmental Quality Performance Limits (Action and Limit Levels)

2.2         Should the environmental quality parameters exceed the Action/Limit Levels, the respective action plans would be implemented. The Action/Limit Levels for each environmental parameter are given in Appendix C.

Monitoring Methodology

2.3         Monitoring works/equipment were conducted/calibrated regularly in accordance with the Updated EM&A Manual. Copies of calibration certificates are attached in the appendices of the corresponding Monthly EM&A Reports within the reporting period.

Implementation Status of Environmental Mitigation Measures

2.4         The Contractor has implemented environmental mitigation measures and requirements as stated in the EIA Report, the Environmental Permit and Updated EM&A Manual. The implementation status of environmental mitigation measures (EMIS) is given in Appendix D.

Site Audit Summary

2.5        Site audits were carried out on a weekly basis. During site inspections in the reporting period, no non-conformance was identified. The observations and recommendations made during the reporting period are summarized in Appendix E.

Status of Waste Management

2.6        The amount of wastes generated by the major site activities of this Project is shown in Appendix F.


3              MONITORING RESULTS

Weather Conditions

3.1         The weather conditions were generally sunny and cloudy during the monitoring sessions of the reporting period. The details of weather conditions for each individual monitoring session was presented in the corresponding Monthly EM&A Reports within the reporting period.

Air Quality

3.2         All 1-hour TSP monitoring was conducted as scheduled in the reporting quarter. No Action/Limit Level exceedance was recorded.

3.3         All 24-hour TSP monitoring was conducted as scheduled in the reporting quarter. No Action/Limit Level exceedance was recorded.

3.4         The graphical presentations of 1-hour and 24-hour TSP monitoring results are shown in Appendix G and Appendix H respectively.

Construction Noise

3.5         All construction noise monitoring was conducted as scheduled in the reporting period. No Action and Limit Level exceedance was recorded.

3.6         The graphical presentations of the noise monitoring results are shown in Appendix I.

Ecology

3.7         All ecological monitoring was conducted as scheduled in the reporting period. No Action Level and 2 Limit Levels were triggered for ecological monitoring between January and March 2021.

3.8         A summary of ecological monitoring analysis is shown in Appendix J.

Water Quality

3.9         According to the Updated EM&A Manual, no water monitoring is required before the commencement of outfall construction at Ng Tung River.

3.10     Site audits were carried out on a weekly basis to monitor and audit the timely implementation of water quality mitigation measures of this project. No non-compliance of water quality mitigation measures was observed in the reporting quarter.

Waste Management

3.11    Site audits were carried out on a weekly basis to monitor and audit to ensure that proper storage, transportation and disposal practices of waste materials generated during construction activities, such as construction and demolition (C&D) materials and general refuse are being implemented. Details of the amount of wastes generated by the major site activities is shown in Appendix F.

Landscape and Visual

3.12     Site audits were carried out on a weekly basis to monitor and audit the timely implementation of landscape and visual mitigation measures of this project. No non-compliance of the landscape and visual mitigation measures was recorded in the reporting quarter.

Influencing Factors on the Monitoring Results

3.13     During the reporting period, the major dust and noise sources identified at the designated monitoring stations are shown in Tables 3.1 and 3.2.

Table 3.1 Major Dust Sources during the Monitoring in the Reporting Quarter

Monitoring Stations

Major Dust Source

AM1 - Wai Loi Tsuen

Road Traffic at Sheung Shui Tung Hing Road

AM2 - Fu Tei Au

N/A

AM1a - Site Boundary of the Shek Wu Hui STW (East)

Vehicle Movement within SWHSTW

AM2a - Site Boundary of the Shek Wu Hui STW (North)

N/A

 

Table 3.2 Major Noise Sources during the Monitoring in the Reporting Quarter

Monitoring Stations

Major Noise Source

NM1 - Wai Loi Tsuen

Railway Noise and Road Traffic at Sheung Shui Tung Hing Road

NM2 - Fu Tei Au

N/A

NM3 - Man Kok Village

Road traffic at Po Wan Road

 

3.14     The observations identified during ecological monitoring at the designated monitoring stations are shown in Table 3.3.

Table 3.3 Observations during Ecological Monitoring in the Reporting Quarter

Location

Project Related

Non-Project Related

T1 (PC1, PC2)

N/A

Fishing, R.C. Airplane and jaywalking

T2 (PC3, PC4)

Excavation, crane and sheet-piling

Fishing, golfing and jaywalking

PC5

Excavation, crane and sheet-piling

N/A

T3 (PC6, PC7)

N/A

Fishing, jaywalking, breaking works, set-up of sedimentation tank and unknown source of smoke

 


 

4              NON-COMPLIANCE (EXCEEDANCES) OF THE ENVIRONMENTAL QUALITY PERFORMANCE LIMITS (ACTION AND LIMIT LEVELS)

Summary of Exceedances

4.1         Environmental monitoring works were performed in the reporting period and all monitoring results were checked and reviewed. A summary of exceedances is attached in Appendix K.

4.2         No Action/Limit Level exceedance was recorded at all 1-hour and 24-hour TSP monitoring stations in the reporting quarter.

4.3         No Action/Limit Level exceedance was recorded at all noise monitoring stations in the reporting quarter.

4.4         No Action Level was triggered. 2 Limit Level exceedance was recorded for ecological monitoring in the reporting quarter. As the decline in numbers of Great Cormorant was considered non-project related, no remedial measure for the project is proposed.

4.5        No non-conformity for landscape and visual impact was recorded in the reporting quarter.

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

4.6        There was no non-compliance from the site audits in the reporting period. The observations and recommendations made in each individual site audit session were attached in the Appendix E.

Summary of Complaint, Warning, Notification of Any Summons and Successful Prosecution

4.7         1 environmental complaint regarding odour emission from SWHEPP was received in the reporting quarter. No environmental warning, notifications of summons and environmental prosecution were received during the reporting quarter.

4.8         The summaries of environmental complaint, warning, summon and notification of successful prosecution for the Project is presented in Appendix L.

 

 


5              COMMENTS, CONCLUSIONS AND RECOMMENDATIONS

Review of Monitoring Methodology and the Practicality and Effectiveness of EM&A Programme

5.1         The EM&A methodology has been effective in monitoring the environmental impacts of the Project and the effectiveness of the mitigation measures. The data collected were useful in determining whether the Project had caused unacceptable impacts on the sensitive receivers. Analysis of all EM&A data collected throughout the baseline and the impact periods demonstrated the environmental acceptability of the Project.

Review on Effectiveness of Mitigation Measures

5.2         The mitigation measures recommended in the EIA report are considered effective in minimizing environmental impacts.

5.3         The Contractor has implemented the recommended mitigation measures except for those mitigation measures not applicable at this stage.

5.4         Environmental monitoring works were performed in the reporting quarter and all monitoring results were checked and reviewed.

5.5         The summary record of non-compliance (exceedances) of Action/Limit Level for environmental monitoring in the reporting quarter has been presented in Table II above and in Appendix K.

5.6         1 environmental complaint was received in the reporting quarter. The details are attached in the Appendix L.

5.7         No warning, notifications of summons and environmental prosecution were received in the reporting quarter. The details are attached in the Appendix L.

5.8         The effectiveness of environmental management is satisfactory given that the recommendations given in the site inspections performed in the reporting period are met.

Recommendations

5.9         According to the environmental audits performed in the reporting quarter, the following recommendations were made:

Air Quality

         Regular water spraying on haul road and dry surfaces should be applied to minimize dust generation.

         Stockpiles should be covered by impervious materials.

 

Water Quality

         Stagnant water should be removed and pumped through the sedimentation tank.

         Wastewater should be pumped and collected in the sedimentation tank before discharge.

         Muddy water should not be discharged into the surrounding rivers.

         No slurry should be disposed of at the existing Shek Wu Hui Sewage Treatment Works.

 

Waste Management

         General refuse and construction waste accumulation should be avoided.

         Chemicals should be stored in drip trays properly.