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

Purpose of the Report 5

Project Organizations. 5

Construction Activities undertaken during the Reporting Month. 6

Summary of EM&A Requirements. 7

Statues of Environmental Licensing and Permitting. 7

2 AIR Quality.. 9

Monitoring Requirement 9

Monitoring Locations. 9

Monitoring Parameters and Frequency. 9

Monitoring Equipment 9

Monitoring Methodology. 10

Results and Observations. 12

Comparison of EM&A Result with EIA Prediction. 13

3 noise.. 14

Monitoring Requirements. 14

Monitoring Locations. 14

Monitoring Parameters, Frequency and Duration. 14

Monitoring Equipment 14

Monitoring Methodology and QA/QC Procedure. 15

Maintenance and Calibration. 15

Results and Observations. 15

Comparison of EM&A Result with EIA Prediction. 16

4 Ecology.. 17

Monitoring Requirements. 17

Monitoring Locations. 17

Monitoring Parameters, Frequency and Duration. 18

Monitoring Methodology. 18

Analytical Methodology. 18

Results. 19

Analysis. 20

Observations. 20

5 Water Quality.. 22

Monitoring Requirement 22

6 waste management.. 22

Monitoring Requirement 22

Waste Management Status. 22

7 landscape and visual.. 23

Audit Requirement 23

8 environmental audit.. 24

Site Audits. 24

Implementation Status of Environmental Mitigation Measures. 24

Implementation Status of Event and Action Plans. 27

9 Environmental non-conformance.. 28

Summary of Complaint, Warning, Notification of any Summons and Successful Prosecution. 28

Summary of Exceedance. 28

10 future Key issues. 29

Monitoring Schedule. 30

11 Conclusions and recommendations. 31

Conclusions. 31

Recommendations. 31

 

 

lIST OF TABLES

 

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

Table II Summary of Complaint/Summons/Prosecution in the Reporting Month

Table III 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 Month

Table 1.3 Summary of Environmental License and Permit

Table 2.1 Air Quality Monitoring Locations

Table 2.2 Frequency and Parameters of Air Quality Monitoring

Table 2.3 Air Quality Monitoring Equipment

Table 2.4 Major Dust Source during Air Quality Monitoring

Table 2.5 Comparison of 1-hr TSP Monitoring Data with Predictions in EIA Report (As Approved in 2013)

Table 2.6 Comparison of 24-hr TSP Monitoring Data with Predictions in EIA Report (As Approved in 2013)

Table 3.1 Noise Monitoring Stations

Table 3.2 Frequency and Parameters of Noise Monitoring

Table 3.3 Noise Monitoring Equipment

Table 3.4 Other Noise Source during Noise Monitoring

Table 3.5 Baseline Noise Level and Noise Limit Level for Monitoring Stations

Table 3.6 Comparison of Noise Monitoring Data with Predictions in EIA Report (As Approved in 2013)

Table 4.1 Monitoring of Measures to Minimise Disturbance to Waterbirds on Ng Tung, Sheung Yue and Shek Sheung Rivers during Pre-Construction Phase

Table 4.2 Ecological Monitoring Stations

Table 4.3 Representative Waterbirds

Table 4.4 Total Bird Species and Abundance in the Reporting Month

Table 4.5 Abundance of Representative Waterbirds in the Reporting Month

Table 4.6 T-test Result for All Waterbirds in the Reporting Month

Table 4.7 T-test Result for Representative Waterbirds in the Reporting Month

Table 4.8 Observations during Ecological Monitoring in the Reporting Month

Table 8.1 Observations and Recommendations of Site Audit of Contract No. DC/2018/06

Table 8.2 Observations and Recommendations of Site Audit of Contract No. DC/2018/07

Table 8.3 Observations and Recommendations of Site Audit of Contract No. DE/2018/03

Table 8.4 Observations and Recommendations of Site Audit of Contract No. DE/2018/04

Table 10.1 Summary Table for Site Activities in the Next Reporting Period

 

 

 

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 Action and Limit Levels

Appendix B Environmental Monitoring Schedules

Appendix C Copies of Calibration Certificates for Air Quality Monitoring

Appendix D Weather Information

Appendix E 1-hour TSP Monitoring Results and Graphical Presentations

Appendix F 24-hour TSP Monitoring Results and Graphical Presentations

Appendix G Copies of Calibration Certificates for Noise Monitoring

Appendix H Noise Monitoring Results and Graphical Presentations

Appendix I Ecological Monitoring Results and Analysis

Appendix J Photo Records of Ecological Monitoring

Appendix K Site Audit Summary

Appendix L Waste Flow Table

Appendix M Event and Action Plans

Appendix N Environmental Mitigation Implementation Schedule (EMIS)

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

Appendix P Summary of Exceedance

Appendix Q Tentative Construction Programme

 

 

 


EXECUTIVE SUMMARY

Introduction

 

1.             This is the 17th EM&A 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. 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 during the reporting month of May 2021.

Summary of Main Works Undertaken and Key Measures Implemented

 

2.             The main works undertaken during the reporting period are as follows:

 

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

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

      RC works

      Wall and slab construction

      Backfilling

      Pipe laying

      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 & CHS

     Pre-drilling work and foundation work

     Pre-bored H piles

     Cable diversion works

     Alternation of existing powerhouse

     Demolition work of existing main facilities

     Sheet pile installation

DE/2018/03

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

      Relocate container includes, remove shrubs and laying blinding

      Trial pits excavation

      Construct wheel washing facilities

      Setup of piling works, mobilization of plant and equipment

      Socket H pilling

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

      Retrofitting 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.

        Faded NRMM label was replaced.

 

Water Quality

        Stagnant water on the impervious sheets was removed.

 

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 during the reporting month (May 2021) and the investigation results and/or follow-up actions:

 

Air Quality Monitoring

        No Action/Limit Level exceedance for 1-hour TSP was recorded.

        No Action/Limit Level exceedance for 24-hour TSP was recorded.

 

Construction Noise Monitoring

        No Action/Limit Level exceedance for day time construction noise monitoring was recorded in the reporting month.

 

Ecological Monitoring

        No Action and Limit Level exceedance was triggered.

Complaint Handling, Prosecution and Public Engagement

 

Table II Summary of Complaint/Summons/Prosecution in the Reporting Month

Event

Event Details

Follow-up/ Remedial Actions

Status/ Remarks

Number

Brief Description

Complaints Received

0

-

-

-

Notification of Summons and Prosecutions Received

0

-

-

-

Public Engagement Activities

0

-

-

-

Reporting Changes

5.              There were no reporting changes during the reporting month.

Future Key Issues

 

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

 

Table III 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

       Excavation works

       RC works

       Wall and slab construction

       Backfilling

       Pipe laying

       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

       Sheet pile installation

DE/2018/03

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

      Socket H pilling

      Installation of EOT crane (LA-05-02)

      Installation of F.S. equipment

      Relocate container includes, remove shrubs and laying blinding

      Remove obstructions from piling location

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

 


 

 

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 EM&A works for Shek Wu Hui Effluent Polishing Plant Main Works Stage 1 (hereinafter called the Project).

Purpose of the Report

1.5         This is the 17th Monthly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period in May 2021.

Project Organizations

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

        Permit Holder 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)

1.7         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

Ms. Konica Cheung

2594 7463

AECOM

Supervisor Representative

Ms. Bianca Choi

3907 6141

Cinotech

Environmental Team

Mr. KS Lee (ETL)

2151 2091

Ms. Betty Choi

2151 2072

Ramboll

Independent Environmental Checker

Mr. YH Hui

3465 2850

KLCWJV

Contractor (DC/2018/06)

Ms. Ruby Hui

6218 6408

KLCWJV

Contractor (DC/2018/07)

Ms. Shirley Kong

5162 5933

JEC

Contractor (DE/2018/03)

Ms. Juliet Ting

6826 7319

Bestwise

Contractor (DE/2018/04)

Mr. Albus Cheung

9731 0831

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

Construction Activities undertaken during the Reporting Month

1.9         The major site activities undertaken in the reporting month included:

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

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

      RC works

      Wall and slab construction

      Backfilling

      Pipe laying

      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 & CHS

     Pre-drilling work and foundation work

     Pre-bored H piles

     Cable diversion works

     Alternation of existing powerhouse

     Demolition work of existing main facilities

      Sheet pile installation

DE/2018/03

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

      Relocate container includes, remove shrubs and laying blinding

      Trial pits excavation

      Construct wheel washing facilities

      Setup of piling works, mobilization of plant and equipment

      Socket H pilling

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

      Retrofitting the existing primary sedimentation tank no. 4 and 6

Summary of EM&A Requirements

1.10     The EM&A programme requires construction noise monitoring, air quality monitoring, water quality monitoring, ecological monitoring and environmental site audit, etc. The EM&A requirements for each parameter are described in the following sections, including:

        All monitoring parameters;

        Action and Limit levels for all environmental parameters;

        Event Action Plans;

        Environmental mitigation measures, as recommended in the Project EIA Report.

1.11     The advice on the implementation status of environmental protection and pollution control/mitigation measures is summarized in Section 8 of this report.

1.12     This report presents the monitoring results, observations, locations, equipment, period, methodology and QA/QC procedures of the monitoring parameters of the required environmental monitoring works and audit works for the Project in May 2021.

Statues of Environmental Licensing and Permitting

1.13     All permits/licenses obtained for the Project are summarized in Table 1.3.

Table 1.3 Summary of Environmental License and Permit

Contract No.

Permit / License No.

Valid Period

Status

From

To

Environmental Permit (EP)

All

FEP-02/474/2013

15 Feb 2018

N/A

Valid

Notification of Construction Works under Air Pollution Control Ordinance (APCO)

DC/2018/06

449210 (Portion A & C)

23 Sep 2019

N/A

Valid

DC/2018/06

449211 (WM1)

23 Sep 2019

N/A

Valid

DC/2018/07

449210

23 Sep 2019

N/A

Valid

DE/2018/03

455843 (WA3)

6 May 2020

N/A

Valid

DE/2018/03

457212 (WA1-B)

15 Jun 2020

N/A

Valid

DE/2018/03

460065 (Sidestream)

16 Sep 2020

N/A

Valid

DE/2018/04

460181

17 Sep 2020

N/A

Valid

Billing Account for Construction Waste Disposal

DC/2018/06

7035390

11 Oct 2019

N/A

Valid

DC/2018/07

7035985

9 Dec 2019

N/A

Valid

DE/2018/03

7035700

6 Nov 2019

N/A

Valid

DE/2018/04

703621912

2 Jan 2020

N/A

Valid

Registration of Chemical Waste Producer

DC/2018/06

5213-624-K3371-01

14 Nov 2019

N/A

Valid

DC/2018/07

5213-624-K3371-02

6 Jan 2020

N/A

Valid

DE/2018/03

5213-624-T3861-01

14 Apr 2020

N/A

Valid

DE/2018/04

5213-624-B2592-01

7 Jul 2020

N/A

Valid

Effluent Discharge License

DC/2018/06

WT00035431-2019 (Portion C)

27 Jul 2020

31 Jan 2025

Valid

DC/2018/06

WT00035718-2020 (Portion A)

2 Apr 2020

30 Apr 2025

Valid

DC/2018/07

WT00035727-2020

1 Apr 2020

30 Apr 2025

Valid

DE/2018/03

WT00037220-2020

16 Mar 2021

31 Jan 2026

Valid

Construction Noise Permit (Use of Powered Mechanical Equipment)

DC/2018/06 & DC/2018/07

GW-RN0181-21

12 Apr 2021

11 Jul 2021

Valid

DC/2018/06

GW-RN0321-21

15 May 2021

30 Jun 2021

Valid

DE/2018/03

GW-RN0274-21

28 Apr 2021

27 Jul 2021

Valid

Admission Ticket for Disposal of Special Waste

DC/2018/07

16113

17 Feb 2021

16 Jun 2021

Valid

 


 

2               AIR Quality

Monitoring Requirement

2.1         According to the Updated EM&A Manual of SWHEPP, 1-hour and 24-hour Total Suspended Particulates (TSP) monitoring were conducted to monitor the air quality for this Project. For regular impact monitoring, a sampling frequency of at least once in every six days at all of the monitoring stations for 24-hour TSP monitoring. For 1-hour TSP monitoring, the sampling frequency of at least three times in every six days shall be undertaken when the highest dust impact occurs. Appendix A shows the established Action/Limit Levels for the environmental monitoring works.

Monitoring Locations

2.2         Four designated monitoring stations were selected for air quality monitoring programme. Table 2.1 describes the air quality monitoring locations, which are also depicted in Figure 2.

Table 2.1 Air Quality Monitoring Locations

Monitoring Stations

Location

Location of Measurement

AM1(1)

Wai Loi Tsuen

Ground Level

AM2(1)

Fu Tei Au

Ground Level

AM1a(2)

Site Boundary of the Shek Wu Hui STW (East)

Ground Level

AM2a(2)

Site Boundary of the Shek Wu Hui STW (North)

Ground Level

Remarks: (1) For 1-hour TSP monitoring; (2) For 24-hour TSP monitoring

Monitoring Parameters and Frequency

2.3         Table 2.2 summarizes the monitoring parameters, monitoring period and frequencies of impact air quality monitoring. The monitoring schedule is shown in Appendix B.

Table 2.2 Frequency and Parameters of Air Quality Monitoring

Monitoring Stations

Parameter

Period

Frequency

AM1 & AM2

1-hour TSP

0700 1900

3 times/day, once every 6 days

AM1a & AM2a

24-hour TSP

24 hours

Once every 6 days

Monitoring Equipment

2.4         High Volume Samplers (HVS) in compliance with the specification stipulated in the EM&A Manual, Section 2.2.2, were used to carry out 24-hour TSP monitoring. Direct reading dust meter were also used to measure 1-hour average TSP levels. The 1-hour sampling was determined by HVS to check the validity and accuracy of the results measured by direct reading method.

2.5         Wind data monitoring equipment was set on rooftop (about 4/F) of the SWHSTW control room building for logging wind speed and wind direction such that the wind sensors were clear of obstructions or turbulence caused by building. The wind data monitoring equipment was re-calibrated at least once every six months and the wind directions were divided into 16 sectors of 22.5 degrees each.

2.6         Table 2.3 summarizes the equipment to be used for air quality monitoring. Copies of calibration certificates are attached in Appendix C.

Table 2.3 Air Quality Monitoring Equipment

Equipment

Model and Make

Quantity

1-hour TSP Dust Meter

Sibata Model No.: LD-5R

2

HVS Sampler

GMW Model: GS 2310

1

TISCH Model: TE 5170

1

Calibrator

TISCH Model: TE-5025A

1

Wind Anemometer

Global Water Instrumentation WE800

1

Monitoring Methodology

1-hour TSP Monitoring

Measuring Procedures

2.7         The measuring procedures of the 1-hour dust meter are in accordance with the Manufacturers Instruction Manual as follows:

(Sibata Model No.: LD-5R)

          The 1-hour dust meter is placed at least 1.3 meters above ground.

          Set POWER to ON and make sure that the battery level was not flash or in low level.

          Allow the instrument to stand for about 3 minutes and then the cap of the air sampling inlet has been released.

          Push the knob at MEASURE position.

          Set time/mode setting to [BG] by pushing the time setting switch. Then, start the background measurement by pushing the start/stop switch once. It will take 6 sec. to complete the background measurement.

          Push the time setting switch to change the time setting display to [MANUAL] at the bottom left of the liquid crystal display. Finally, push the start/stop switch to stop the measuring after 1 hour sampling.

          Information such as sampling date, time, count value and site condition were recorded during the monitoring period.

 

Maintenance/Calibration

2.8         The following maintenance/calibration is required for the 1-hour dust meter:

          Check and calibrate the meter by HVS to check the validity and accuracy of the results measured by direct reading method at 2-month intervals throughout all stages of the air quality monitoring.

24-hour TSP Monitoring

Instrumentation

2.9         High volume samplers (HVS) (TISCH Model: TE-5170) complete with appropriate sampling inlets was employed for 24-hour TSP monitoring. The sampler was composed of a motor, a filter holder, a flow controller and a sampling inlet and its performance specification complied with that required by USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50). Moreover, the HVS also met all the requirements in Section 2.2 of the Annex II Specification.

2.10     The positioning of the HVS samplers are as follows:

           A horizontal platform with appropriate support to secure the samplers against gusty wind shall be provided;

           No two samplers shall be placed less than 2 meter apart;

           The distance between the sampler and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the sampler;

           A minimum of 2 metres of separation from walls, parapets and penthouses is required for rooftop samplers;

           A minimum of 2 metres of separation from any supporting structure, measured horizontally is required;

           No furnace or incinerator flue is nearby;

           Airflow around the sampler is unrestricted;

           The sampler is more than 20 metres from the dripline;

           Any wire fence and gate, to protect the sampler, shall not cause any obstruction during monitoring;

           Permission must be obtained to set up the samplers and to obtain access to the monitoring stations; and

           A secured supply of electricity is needed to operate the samplers.

 

Operating/analytical procedures for the operation of HVS

2.11     Operating/analytical procedures for the air quality monitoring are highlighted as follows:

          Prior to the commencement of the dust sampling, the flow rate of the high volume sampler was properly set (between 1.1 m3/min. and 1.4 m3/min.) in accordance with the manufacturer's instruction to within the range recommended in USEPA Standard Title 40, CFR Part 50.

          For TSP sampling, fiberglass filters with a collection efficiency of > 99% for particles of 0.3μm diameter were used.

          The power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated for 5 minutes to establish thermal equilibrium before placing any filter media at the designated air monitoring station.

          The filter holding frame was then removed by loosening the four nuts and a weighted and conditioned filter was carefully centered with the stamped number upwards, on a supporting screen.

          The filter was aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter. Then the filter holding frame was tightened to the filter holder with swing bolts. The applied pressure should be sufficient to avoid air leakage at the edges.

          The shelter lid was closed and secured with the aluminum strip.

          The timer was then programmed. Information was recorded on the record sheet, which included the starting time, the weather condition and the filter number (the initial weight of the filter paper can be found out by using the filter number).

           After sampling, the filter was removed and sent to the HOKLAS laboratory (High Precision Chemical Testing Limited) for weighing. The elapsed time was also recorded.

          Before weighing, all filters were equilibrated in a conditioning environment for 24 hours. The conditioning environment temperature should be between 25C and 30C and not vary by more than 3C; the relative humidity (RH) should be < 50% and not vary by more than 5%. A convenient working RH is 40%.

 

Maintenance/Calibration

2.12     The following maintenance/calibration is required for the HVS:

          The high volume motors and their accessories were properly maintained. Appropriate maintenance such as routine motor brushes replacement and electrical wiring checking were made to ensure that the equipment and necessary power supply are in good working condition.

           High volume samplers were calibrated at bi-monthly intervals using TE-5025A Calibration Kit throughout all stages of the air quality monitoring.

Results and Observations

2.13     Impact air quality monitoring was conducted at four monitoring stations as scheduled. The monitoring schedule is shown in Appendix B.

2.14     No Action/Limit Level exceedance was recorded for all 1-hour TSP monitoring in the reporting month.

2.15     No Action/Limit Level exceedance was recorded for all 24-hour TSP monitoring in the reporting month.

2.16     The air temperature, precipitation and the relative humidity data was obtained from daily extract of Ta Kwu Ling Station in Hong Kong Observatory Climate Information Service, where the wind speed and wind direction were recorded by the installed Wind Anemometer at rooftop (about 4/F) of the SWHSTW control room building. This weather information for the reporting month is summarized in Appendix D.

2.17     The monitoring data and graphical presentations of 1-hour and 24-hour TSP monitoring results are shown in Appendix E and Appendix F respectively.

2.18     According to our field observations, the major dust source identified at the designated air quality monitoring stations are as follows:

Table 2.4 Major Dust Source during Air Quality Monitoring

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

Comparison of EM&A Result with EIA Prediction

2.19     The air monitoring data was compared with the predictions in the EIA Report (as approved in 2013) as summarised in Tables 2.5 and Table 2.6.

Table 2.5 Comparison of 1-hr TSP Monitoring Data with Predictions in EIA Report (As Approved in 2013)

Monitoring Stations

ASR ID

Predicted 1-hr TSP Concentration in EIA Report (as Approved in 2013), dB(A), μg/m3

Reporting Month
(May 2021),
μg/m3

AM1 - Wai Loi Tsuen

N/A

N/A(1)

17.6 - 70.4

AM2 - Fu Tei Au

FLN-E28

255

26.4 - 57.2

Remarks:

(1) No 1-hr TSP concentration was predicted in EIA Report (As Approved in 2013).

Table 2.6 Comparison of 24-hr TSP Monitoring Data with Predictions in EIA Report (As Approved in 2013)

Monitoring Stations

Predicted 24-hr TSP Concentration in EIA Report (as approved in 2013), dB(A), μg/m3

Reporting Month
(May 2021),
μg/m3

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

N/A(1)

13.5 - 83.7

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

N/A(1)

17.8 - 43.6

Remarks:

(1) No 24-hr TSP concentration was predicted in EIA Report (as approved in 2013).

 

2.20     The 1-hour TSP concentration at AM2 in the reporting month was lower than the prediction in the EIA Report (As Approved in 2013). The 1-hour TSP concentrations at AM1 as well as 24-hour TSP concentrations at AM1a and AM2a were not predicted in the EIA Report (As Approved in 2013).

 


3               noise

Monitoring Requirements

3.1         According to the Updated EM&A Manual, construction noise monitoring was conducted to monitor the construction noise arising from the construction activities. The regular monitoring frequency for each monitoring station shall be on a weekly basis and conduct one set of measurements between 0700 and 1900 hours on normal weekdays. Appendix A shows the established Action and Limit Levels for the environmental monitoring works.

Monitoring Locations

3.2         Noise monitoring was conducted at three designated monitoring stations in the reporting period. Table 3.1 and Figure 3 show the locations of these stations.

 

Table 3.1   Noise Monitoring Stations

Monitoring Stations

Location

Location of Measurement

NM1

Wai Loi Tsuen

Ground Level

NM2

Fu Tei Au

Ground Level

NM3

Man Kok Village

Ground Level

Monitoring Parameters, Frequency and Duration

3.3         Table 3.2 summarizes the monitoring parameters, frequency and total duration of monitoring. The noise monitoring schedule is shown in Appendix B.

Table 3.2 Frequency and Parameters of Noise Monitoring

Monitoring Stations

Time Period

Duration

Frequency

Parameter

Measurement

NM1

0700-1900 hrs on normal weekdays

30 minutes

Once per week

L10(30 min.) dB(A)

L90(30 min.) dB(A)

Leq(30 min.) dB(A)

Free Field

NM2

Free Field

NM3

Free Field

Monitoring Equipment

3.4         Integrating Sound Level Meter was used for impact noise monitoring. The meters were Type 1 sound level meter capable of giving a continuous readout of the noise level readings including equivalent continuous sound pressure level (Leq) and percentile sound pressure level (Lx) that also complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications. Table 3.3 summarizes the noise monitoring equipment being used. Copies of calibration certificates are attached in Appendix G.

Table 3.3 Noise Monitoring Equipment

Equipment

Model and Make

Quantity

Integrating Sound Level Meter

BSWA 308

3

Calibrator

ST-120

2

Monitoring Methodology and QA/QC Procedure

3.5         The monitoring procedures are as follows:

             The monitoring station was normally be at a point 1m from the exterior of the sensitive receivers building fa蓷de and be at a position 1.2m above the ground.

             For free field measurement, the meter was positioned away from any nearby reflective surfaces. All records for free field noise levels were adjusted with a correction of +3 dB(A).

             The battery condition was checked to ensure the correct functioning of the meter.

             Parameters such as frequency weighting, the time weighting and the measurement time were set as follows:

-           Frequency weighting: A

-           Time weighting: Fast

-           Time measurement: 30 minutes

             Prior to and after each noise measurement, the meter was calibrated using a Calibrator for 94.0 dB at 1000 Hz. If the difference in the calibration level before and after measurement was more than 1.0 dB, the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

             The wind speed was frequently checked with the portable wind meter.

             At the end of the monitoring period, the Leq, L90 and L10 were recorded. In addition, site conditions and noise sources were recorded on a standard record sheet.

             Noise monitoring would be cancelled in the presence of fog, rain, and wind with a steady speed exceeding 5 m/s, or wind with gusts exceeding 10 m/s. Supplementary monitoring would be provided to ensure sufficient data would be obtained.

Maintenance and Calibration

3.6         The microphone head of the sound level meter and calibrator were cleaned with a soft cloth at quarterly intervals.

3.7         The sound level meter and calibrator were checked and calibrated at yearly intervals.

3.8         Immediately prior to and following each noise measurement the accuracy of the sound level meter was checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements were accepted as valid only if the calibration levels from before and after the noise measurement agree to within 1.0 dB.

Results and Observations

3.9         No Action/Limit Level exceedance was recorded for all construction noise monitoring in the reporting month.

3.10     Noise monitoring results and graphical presentations are shown in Appendix H.

3.11     The major noise sources identified at the noise monitoring stations are shown in Table 3.4.

Table 3.4 Other Noise Source Identified during Noise Monitoring

Monitoring Stations

Major Noise Source

NM1

Railway Noise and Road Traffic at Sheung Shui Tung Hing Road

NM2

N/A

NM3

Road Traffic at Po Wan Road

3.12     All the Construction Noise Levels (CNLs) reported in this report were adjusted with the corresponding baseline level (i.e. Measured Leq Baseline Leq = CNL), in order to facilitate the interpretation of the noise exceedance. The baseline noise level and the Noise Limit Level at each designated noise monitoring station are presented in Table 3.5.

Table 3.5 Baseline Noise Level and Noise Limit Level for Monitoring Stations

Monitoring Stations

Baseline Noise Level, dB (A)
(at 0700
1900 hrs on normal weekdays)

Noise Limit Level, dB (A) (at 0700 1900 hrs on normal weekdays)

NM1

63.4

75

NM2

58.0

NM3

63.4

Comparison of EM&A Result with EIA Prediction

3.13     The noise monitoring data was compared with the predictions in EIA Report (as approved in 2013) as summarised in Table 3.6.

Table 3.6 Comparison of Noise Monitoring Data with Predictions in EIA Report (As Approved in 2013)

Monitoring Stations

NSR ID

Predicted Mitigated Construction Noise Levels in EIA Report (as Approved in 2013), dB(A)

Reporting Month
(May 2021),
Leq (30min) dB(A)

NM1 - Wai Loi Tsuen

N/A

N/A(1)

55.6 59.9

NM2 - Fu Tei Au

N/A

N/A(1)

53.8 62.7

NM3 Man Kok Village

FN-18

66-75

55.1 61.4

Remarks:

(1) No construction noise level was predicted in EIA Report (As Approved in 2013).

3.14     The results at NM3 were lower than the range of the predicted mitigated construction noise levels in the EIA Report (As Approved in 2013). Construction noise levels at NM1 and NM2 were not predicted in the EIA Report (As Approved in 2013).

 

 

4               Ecology

Monitoring Requirements

4.1         According to the Updated EM&A Manual, waterbird species which use rivers near the Project Site were identified and recorded. The monitoring requirement in the EM&A Manual is shown in Table 4.1. Appendix A shows the established Action/Limit Levels for ecological monitoring works.

Table 4.1 Monitoring of Measures to Minimise Disturbance to Waterbirds on Ng Tung, Sheung Yue and Shek Sheung Rivers during Construction Phase

Phase

Methodology

Construction

Weekly transect at both high and low tides to identify and enumerate all bird species utilising the river channels and identify any sources of actual or potential disturbance to birds due to construction activities throughout the construction period.

4.2         The monitoring should be conducted by the ET and supervised by a qualified ecologist who will be a member of the ET.

Monitoring Locations

4.3         Transect and point count surveys were proposed within the 500m boundary of Ng Tung River, Sheung Yue River and Shek Sheung River of the assessment area. Three transects and seven-point count locations during high and low tides were applied. These locations are shown in Figure 4 and summarized in Table 4.2. The photo of each transect is provided in Appendix J.

Table 4.2 Ecological Monitoring Stations

Monitoring Stations

Descriptions

Influenced by Tidal Action

Transect T1

Along Ng Tung River

No

Point Count Location P1

Point Count Location P2

Transect T2

Yes

Point Count Location P3

Point Count Location P4

Point Count Location P5

At Shek Sheung River
(Low-flow Channel)

No

Transect T3

Along Shek Sheung River & Sheung Yue River

Yes

Point Count Location P6

At Shek Sheung River

Yes

Point Count Location P7

At Intersection between Sheung Yue River and Shek Sheung River

Yes

Monitoring Parameters, Frequency and Duration

4.4         Monitoring surveys were conducted on a weekly basis at both high and low tides (it is considered high tide when tidal levels are above 1.5m and low tide when tidal level are below 1.5m at Tsim Bei Tsui Station). The magnitude of how much above or below 1.5m was subject to tidal conditions of that week as it varied throughout different times of the year. Nonethel