Job No.: TCS00874/16

CEDD Contract No. CV/2012/05

Development of a Bathing Beach at Lung Mei, Tai Po

Monthly Environmental Monitoring and Audit Report (March 2018)

Prepared For

Welcome Construction CO., Ltd

Date	Reference No.	Prepared By	Certified By
20 November 2018	TCS00874/16/600/R0155v5
		Nicola Hon (Environmental Consultant)	T.W. Tam (Environmental Team Leader)

Version	Date	Remarks
1	12 April 2018	First Submission
2	13 April 2018	Amended according to IEC’s comments on 13 April 2018
3	16 April 2018	Amended according to IEC’s comments on 14 April 2018
4	21 May 2018	Amended according to EPD’s Comments on 14 May 2018
5	20 November 2018	Amended according to EPD’s Comments on 5 October 2018

executive summary

ES.01 Civil Engineering and Development Department (hereafter referred as “CEDD”) is the Project Proponent and the Permit Holder of Agreement No. CE 59/2005 (EP) Development of a Bathing Beach at Lung Mei, Tai Po (hereinafter referred as “the Project”), which is a Designated Project to be implemented under Environmental Permit number EP-388/2010 (hereinafter referred as “the EP-388/2010” or “the EP”).

ES.02 Action-United Environmental Services & Consulting (hereinafter referred as “AUES”) has been commissioned as the Environmental Team for the Project (hereinafter referred as “the ET”) to perform relevant Environmental Monitoring and Audit (EM&A) programme, including baseline and impact environmental monitoring in accordance with the EM&A Manual approved under the Environmental Impact Assessment Ordinance (EIAO).

ES.03 According to the Approved Environmental Monitoring and Audit (EM&A) Manual [November 2007] (hereinafter referred as ‘the EM&A Manual’), air quality, construction noise and water quality monitoring should be required to be monitored for baseline and during the construction phase of the Project. In January 2018, an updated EM&A Manual (AUES Ref.: TCS00874/16/300/L0085 dated 11 January 2018) was prepared to update of noise and air sensitive receivers and recent site condition for the EM&A Programme and it was submitted and approved by EPD in January 2018.

ES.04 This is the 4^th monthly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 to 31 March 2018 (hereinafter ‘the Reporting Period’). In the Reporting Period, the impact monitoring covered air quality, construction noise and water quality.

Environmental Monitoring and Audit Activities

ES.05 Environmental monitoring activities under the EM&A program in the Reporting Period are summarized in the following table.

Issues	Environmental Monitoring Parameters / Inspection	Sessions^Note 1
Air Quality	1-hour TSP	6
	24-hour TSP	5
Construction Noise	LAeq(30min) Daytime	4
Water Quality	Marine Water Sampling	12
Inspection / Audit	ET Regular Environmental Site Inspection	2
	IEC Monthly Environmental Site Audit	1

Note: 1.) Total sessions are counted by monitoring days.

Breach of Action and Limit (A/L) Levels

ES.06 No exceedance of air quality and construction noise monitoring were recorded in this Reporting Period. For water quality monitoring, a total of 66 Action/ Limit Level exceedances of Turbidity and Suspended Solids were recorded which involved all monitoring days. NOEs were issued to relevant parties upon confirmation of the monitoring result and investigation for the cause of exceedance was carried out by ET subsequently. The statistics of environmental exceedance, NOE issued and investigation of exceedance are summarized in the following table.

Environmental Issues	Monitoring Parameters	Action Level	Limit Level	Event & Action
				No. of NOE Issued	Investigation	Corrective Actions
Air Quality	1-hour TSP	0	0	0	-	-
	24-hour TSP	0	0	0	-	-
Construction Noise	LAeq(30min)	0	0	0	-	-
Water Quality	DO	0	0	0	-	-
	Turbidity	0	15	4	Not project-related.	NA
	SS	9	42	10	Not project-related.	NA
	Chlorophyll-a	0	0	0	-	-

Note: NOE – Notification of Exceedance

ES.07 In our investigation, there were no marine works carried out during the period of 7 to 29 March 2018, it is considered that exceedances of turbidity and SS in these monitoring days were unlikely caused by Project. There were marine construction activities carried out on 2 and 5 March 2018 and exceedances of SS were recorded on these days. Water quality mitigation measures such as silt curtains were properly implemented and maintained at locations in accordance with EP’s condition. During the joint site inspection by CEDD, Welcome and ET in March 2018, the overall environmental performance was satisfactory and no adverse water quality impact was observed and recorded. Having reviewed environmental performance of the construction site and the monitoring results of both reference, impact stations as well as the sensitive receiver stations, it is considered that the elevated SS levels were comparable to the measured reference results and the fluctuation of SS level were likely due to natural variation and not caused by the works under the project.

Environmental Complaint

ES.08 No environmental complaint was recorded or received in this Reporting Period. The statistics of environmental complaint are summarized in the following table.

Reporting Period	Environmental Complaint Statistics
	Frequency	Cumulative	Complaint Nature
1 – 31 March 2018	0	0	N/A

Notification of Summons and Successful Prosecutions

ES.09 No environmental summons or successful prosecutions were recorded in this Reporting Period. The statistics of environmental complaint are summarized in the following tables.

Reporting Period	Environmental Summons Statistics
	Frequency	Cumulative	Complaint Nature
1 – 31 March 2018	0	0	N/A

Reporting Period	Environmental Prosecution Statistics
	Frequency	Cumulative	Complaint Nature
1 – 31 March 2018	0	0	N/A

Reporting Change

ES.10 There was no reporting change in the EM&A programme in this Reporting Period.

Site Inspection

ES.11 In the Reporting Period, joint site inspection and audit to evaluate site environmental performance was carried out by the CEDD, ET and the Contractor on 15 and 21 March 2018. No non-compliance was noted within this reporting period.

Future Key Issues

ES.12 The forthcoming construction activities included site formation, construction of groynes and construction of eastern and western box culvert. The potential environmental impacts arising from the forthcoming activities included construction waste, air quality, construction noise and water quality.

ES.13 In view of the marine work commencement, special attention should be paid on construction of groynes (Eastern and Western) in which water quality mitigation measures such as erection of silt curtain should be properly implemented and maintained during the course of marine works.

ES.14 The Contractor was reminded that exposed slope should be covered and temporary drainage system should be maintained to prevent surface runoff entering the sea or public area.

ES.15 The dust mitigation measures should be fully implemented such as water spraying during dust work to minimize dust impact as appropriate. All dump trucks leaving the Site should be thoroughly washed by wheel washing facilities and provided with mechanical covers in good service condition.

Table of Contents

1. Introduction 1

1.1 Project Background 1

1.2 Report Structure 1

2. Project Organization and Construction Progress 3

2.1 Project Organization and Management Structure 3

2.2 Construction Progress 3

2.3 Summary of Environmental Submissions 3

3. Summary of Impact Monitoring Requirements 4

3.1 General 4

3.2 Monitoring Parameters 4

3.3 Monitoring Locations 4

3.4 Monitoring Frequency and Period 6

3.5 Monitoring Equipment 7

3.6 Monitoring Procedures 8

3.7 Meteorological Information 11

3.8 Determination of Action/Limit (A/L) Levels 11

3.9 Data Management and Data QA/QC Control 12

4. Air Quality Monitoring 13

4.1 General 13

4.2 Results of Air Quality Monitoring 13

5. Construction Noise Monitoring 14

5.1 General 14

5.2 Results of Noise Monitoring 14

6. Water Quality Monitoring 15

6.1 General 15

6.2 Results of Water quality Monitoring 15

7. Waste Management 19

7.1 General 19

7.2 Records of Waste Quantities 19

8. Ecology 20

8.1 Ecology Monitoring (marine-based) 20

9. Site Inspection 21

9.1 Requirements 21

9.2 Findings / Deficiencies During the Reporting Month 21

10. Environmental Complaint and Non-Compliance 22

10.1 Environmental Complaint, Summons and Prosecution 22

11. Implementation Status of Mitigation Measures 23

11.1 General 23

11.2 Impact Forecast 24

12. Conclusions and Recommentations 25

12.1 Conclusions 25

12.2 Recommendations 25

List of TABLES

Table 2-1 Status of Environmental Licenses and Permits

Table 2-2 Status of Environmental Submission

Table 3-1 Summary of EM&A Impact Monitoring Requirements

Table 3-2 Summary of Air Quality Monitoring Stations

Table 3-3 Designated Noise Monitoring Station according to the EM&A Manual

Table 3-4 Summary of Noise Monitoring Stations

Table 3-5 Location of Marine Water Quality Monitoring Station

Table 3-6 Air Quality Monitoring Equipment

Table 3-7 Construction Noise Monitoring Equipment

Table 3-8 Water Quality Monitoring Equipment

Table 3-9 Testing Method and Reporting Limit of the Chemical Analysis

Table 3-10 Action and Limit Levels for Air Quality

Table 3-11 Action and Limit Levels for Construction Noise

Table 3-12 Action and Limit Levels for Water Quality

Table 4-1 Summary of 24-hour and 1-hour TSP Monitoring Results (A4)

Table 4-2 Summary of 24-hour and 1-hour TSP Monitoring Results (A7)

Table 5-1 Construction Noise Monitoring Results of N1

Table 5-2 Construction Noise Monitoring Results of N2a

Table 5-3 Construction Noise Monitoring Results of N3a

Table 5-4 Construction Noise Monitoring Results of N4

Table 6-1 Results Summary of Depth Average (Surface & Middle Layer) of DO (mg/L)

Table 6-2 Results Summary of Bottom Depth of DO (mg/L)

Table 6-3 Results Summary of Depth Average of Turbidity (NTU)

Table 6-4 Results Summary of Depth Average of Suspended Solids (mg/L)

Table 6-5 Results Summary of Depth Average of Chlorophyll-a (µg/L)

Table 6-6 Summary of Water Quality Exceedance

Table 7-1 Summary of Quantities of Inert C&D Materials

Table 7-2 Summary of Quantities of C&D Wastes

Table 9-1 Site Observations

Table 10-1 Statistical Summary of Environmental Complaints

Table 10-2 Statistical Summary of Environmental Summons

Table 10-3 Statistical Summary of Environmental Prosecution

Table 11-1 Environmental Mitigation Measures in the Reporting Month

List of Appendices

Appendix A Layout Plan of the Project

Appendix B Organization structure and contact details

Appendix C 3-month rolling construction program

Appendix D Monitoring Location

Appendix E Calibration Certificate of Monitoring Equipment

Appendix F Event and Action Plan

Appendix G Impact Monitoring Schedules

Appendix H database of Monitoring Result

Appendix I Graphical plots of Monitoring Results

Appendix J Meteorological Data

Appendix K Waste Flow Table

Appendix L Implementation Schedule of Environmental Mitigation Measures

1. Introduction

1.1 Project Background

1.1.1 Civil Engineering and Development Department (hereafter referred as “CEDD”) is the Project Proponent and the Permit Holder of Agreement No. CE 59/2005 (EP) Development of a Bathing Beach at Lung Mei, Tai Po (hereinafter referred as “the Project”), which is a Designated Project to be implemented under Environmental Permit number EP-388/2010 (hereinafter referred as “the EP-388/2010” or “the EP”).

1.1.2 The major construction activities of the Project comprise construction of 200-metre long bathing beach with a groyne at each end, a shark prevention net; a public car park; retaining walls; and the associated roadworks, drainage and sewerage works. Layout plan of the Project is shown in Appendix A.

1.1.3 Furthermore, the project works is under Environmental Permit (EP) No. EP-388/2010 as a Designated Project and the designated works include:

(i) Construction of a 200m long beach with a groyne at each end of the beach which includes dredging and sandfilling works;

(ii) Construction of one culvert at the eastern side of the beach and another small section of culvert and open drainage channel with gabion embankments at the western end, both to collect and divert surface runoff from upstream locations; and

(iii) Construction of a beach building with associated beach building facilities, kiosk and a carpark and associated road improvement works adjoining the facility.

1.1.4 Action-United Environmental Services & Consulting (hereinafter referred as “AUES”) has been commissioned as an Independent Environmental Team (hereinafter referred as “the ET”) to implement the relevant EM&A program in accordance with the approved EM&A Manual, as well as the associated duties. As part of the EM&A program, baseline monitoring is required to determine the ambient environmental conditions.

1.1.5 Baseline monitoring of air quality and noise were carried out during 7 June to 20 June 2017 and 7 June to 23 June 2017 respectively. The Baseline Monitoring Report for Air Quality and Noise (AUES Ref.: TCS00874/16/600/R0022v3 dated 7 Aug 2017) was verified by IEC and had been submitted to EPD for endorsement. Baseline water quality monitoring was from 23 September 2017 to 21 October 2017. The Baseline Monitoring Report for Water Quality (AUES Ref.: TCS00874/16/600/R0036v2 dated 19 Dec 2017) was verified by IEC and had been submitted to EPD for endorsement. These baseline monitoring reports summarized the key findings of baseline condition and determined a set of Action and Limit Levels (A/L Levels) based on the baseline data. The A/L Levels will serve as the yardsticks for assessing the acceptability of the environmental impact during construction phase of the Project Works impact monitoring.

1.1.6 This is the 4^th monthly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 to 31 March 2018.

1.2 Report Structure

1.2.1 The Monthly Environmental Monitoring and Audit (EM&A) Report is structured into the following sections:-

Section 1 Introduction

Section 2 Project Organization and Construction progress

Section 3 Summary of Impact Monitoring Requirements

Section 4 Air Quality Monitoring

Section 5 Construction Noise Monitoring

Section 6 Water Quality Monitoring

Section 7 Waste Management

Section 8 Ecology

Section 9 Site Inspection

Section 10 Environmental Complaint and non-compliance

Section 11 Implementation Status of Mitigation Measures

Section 12 Conclusion and Recommendation

2. Project Organization and Construction Progress

2.1 Project Organization and Management Structure

2.1.1 Organization structure and contact details of relevant parties with respect to on-site environmental management are shown in Appendix B.

2.2 Construction Progress

2.2.1 The 3-month rolling construction program is enclosed in Appendix C and the major construction activities undertaken in the Reporting Period are listed below:-

· Tree transplanting from Lung Mei to Pak Shek Kok's receptor site

· Site formation

· Construction of Groynes (Eastern and Western)

· Construction of Western Box Culvert

2.3 Summary of Environmental Submissions

2.3.1 Summary of currently relevant permits, licenses, and/or notifications on environmental protection for this Project in this Reporting Period is presented in Table 2-1.

Table 2-1 Status of Environmental Licenses and Permits

Item	Description	License/Permit Status
		Permit no./Account no./ Ref. no.	From	To
1	Air pollution Control (Construction Dust) Regulation	Ref. Number: 418137	N/A	N/A
2	Chemical Waste Producer Registration	Waste Producers Number (WPN): WPN5213-728-W3437-01	21 August 2017	End of Project
3	Water Pollution Control Ordinance	License No.: WT00028905-2017	24 October 2017	31 October 2022
4	Waste Disposal (Charges for Disposal of Construction Waste) Regulation	Billing Account for Disposal of Construction Waste Account No. 7017686	3 July 2013	End of Project

2.3.2 The status of environmental submission under the EM&A Manual and EP requirement is presented in Table 2-2.

Table 2-2 Status of Environmental Submission

Item	EP condition	Description	Status
1	2.4	Report for Capture and Relocation of Common Rat Snake	Approved by EPD on 15 Sep 2017 (EPD ref.: (15) in EP2/N5/C/46 Pt.6 dated 15 Sep 2017)
2	2.5	Landscape Plan	Submitted to EPD on 28 June 2017
3	4.3	Baseline Monitoring Report for Air Quality and Noise (AUES Ref.: TCS00874/16/600/R0022v3 dated 7 Aug 2017)	Approved by EPD on 8 Jan 2018 (EPD ref.: (36) in EP2/N5/C/46 Pt.6 dated 8 Jan 2018)
4		Baseline Monitoring Report for Water Quality(AUES Ref.: TCS00874/16/600/R0036v2 dated 19 Dec 2017)	Approved by EPD on 10 Jan 2018 (EPD ref.: (37) in EP2/N5/C/46 Pt.6 dated 10 Jan 2018)

3. Summary of Impact Monitoring Requirements

3.1 General

3.1.1 The Environmental Monitoring and Audit requirements are set out in the EM&A manual. Environmental issues such as air quality, construction noise and water quality were identified as the key issues during the construction phase of the Project. A summary of the EM&A requirements for air quality, noise monitoring and water quality are presented in the sub-sections below.

3.2 Monitoring Parameters

3.2.1 According to the Project EM&A Manual, the Impact monitoring program covers the following environmental issues:

Ÿ Air Quality;

Ÿ Construction Noise; and

Ÿ Water Quality

3.2.2 A summary of the monitoring parameters is presented in Table 3-1 below.

Table 3-1 Summary of EM&A Impact Monitoring Requirements

Environmental Issue	Parameters
Air Quality	Ÿ 1-hour TSP Ÿ 24-hour TSP
Noise	Ÿ Leq (30min) in six consecutive Leq(5 min) between 07:00-19:00 on normal weekdays
Water Qaulity	In-situ Measurements Ÿ Dissolved Oxygen Concentration (mg/L); Ÿ Dissolved Oxygen Saturation (% ); Ÿ Salinity (mg/L); Ÿ Temperature (℃); Ÿ Turbidity (NTU); Ÿ pH unit; Ÿ Current direction (degree); Ÿ Current speed (m/s); and Ÿ Water depth (m) Laboratory Analysis Ÿ Suspended Solids (mg/L); and Ÿ Chlorophyll-a (µg/L)

3.3 Monitoring Locations

Air Quality

3.3.1 There are air quality monitoring locations (A4 and A6) recommended in Section 3.1 of the EM&A Manual. During liaison with the landlord of A6, he refused to provide access and location for installation of High Volume Sampler (HVS). Therefore, alternative location (A7) was proposed by ET in accordance with Section 3.4 of the EM&A Manual. The proposed alternative locations are considered capable of effectively representing the baseline conditions at the impact monitoring locations. The proposal (ref no.: TCS00874/16/300/L0016b) for alternative monitoring locations was verified by IEC and it has been submitted to EPD for approval on 8 May 2017. The air quality monitoring locations are in Table 3-2 and illustrated in Appendix D.

Table 3-2 Summary of Air Quality Monitoring Stations

Station ID	Location
A4	No. 101 Lung Mei Tsuen
A7	Hong Kong Eco-Farm

Construction Noise

3.3.2 According to Section 4.1 of the EM&A Manual, four designated noise sensitive receivers (N1, N2, N3 and N4) were recommended and they are listed in Table 3-3 and illustrated in Appendix D.

Table 3-3 Designated Noise Monitoring Station according to the EM&A Manual

NSR	Location
N1	Village house - No. 165A Lung Mei
N2*	Village house - No. 103 Lung Mei
N3	Village house - No. 70 Lo Tsz Tin
N4	Village house - No. 79 Lo Tsz Tin

Remarks: (*) Noise monitoring should be conducted at N2a (i.e House No. 101 Lung Mei) if it is changed to residential use during construction phase.

3.3.3 As confirmed on the first day of baseline monitoring, N2a (House no. 101 Lung Mei) has been changed to residential use. Therefore, the noise monitoring is conducted at N2a and to replace N2. Moreover, due to the lack of accessibility of noise monitoring at NSR N3 (Village house – No. 70 Lo Tsz Tin), alternative location was proposed to replace N3 to carry out the noise monitoring.  Having reviewed the surrounding condition, NSR N3a (Village house – No. 66C Lo Tsz Tin) was proposed with the rationales summarized in below.

1) The distance between N3 and N3a is about 18 meter apart and N3a locates at close proximity of the project site and major site activities which are likely to have noise impacts;

2) N3a is a village type residential house and it is a noise sensitive receiver (NSR);

3) Accessibility for noise monitoring work at N3a is available; and

4) Minimal disturbance would be only caused to the proposed monitoring location N3a.

3.3.4 The proposal (ref no.: TCS00874/16/300/L0016b) for alternative monitoring locations was verified by IEC and it has been submitted to EPD for approval on 8 May 2017. The noise monitoring stations are listed in Table 3-4 and illustrated in Appendix D.

Table 3-4 Summary of Noise Monitoring Stations

Station ID	Description
N1	Village house - No. 165A Lung Mei
N2a	Village house - No. 101 Lung Mei
N3a	Village house - No. 66C Lo Tsz Tin
N4	Village house - No. 79 Lo Tsz Tin

Water Quality

3.3.5 According to EM&A Manual Sections 5.1.2, two Reference Stations (R1 and R2), three impact stations (I1, I2 and I3), three sensitive receivers (FCZ1, W1 and M1) and one Gradient station (G1), were identified to perform water quality monitoring. Detailed and co-ordnance of water quality monitoring stations is described in Table 3-5 and the graphical is shown in Appendix D.

Table 3-5 Location of Marine Water Quality Monitoring Station

Station	Coordinates		Description
	Easting	Northing
G1	841483.9	835936.1	Gradient Station - to assist in the identification of the source of any impact.
R1	842307.4	835718.4	Reference Station - for the background water quality for Tolo Harbour as it is at the channel where the water exchange between the enclosed Plover Cove and Tolo Harbour take place. It is located at south of the Project dredging/sandfilling area.
R2	840739.4	836212.4	Reference Station - for the background water quality in the Plover Cove region. It is located at southwest of the Project dredging/sandfilling area.
I1	841338.5	836588.5	Impact Station - located outside the mixing zone of dredging/sandfilling works of the Project.
I2	841590.3	836601.2	Impact Station - located outside the mixing zone of dredging/sandfilling works of the Project.
I3	841807.0	836680.9	Impact Station - located outside the mixing zone of dredging/sandfilling works of the Project.
W1	841858.9	836571.0	Sensitive Receiver - located at the Water Sport Centre, which is about 0.25 km distance to the southeast of the dredging/sandfilling area.
M1	840822.2	836416.4	Sensitive Receiver - located at the Ting Kok SSSI, which is about 0.8 km distance to the west of the dredging/sandfilling area.
FCZ1	841180.6	835230.8	Sensitive Receiver - located at the Yim Tin Tsai East Fish Culture Zone, which is about 1.5 km distance to the southwest of the dredging/sandfilling area.

3.4 Monitoring Frequency and Period

3.4.1 The monitoring frequency and period for impact monitoring are summarized below.

Air Quality Monitoring

3.4.2 Monitoring frequency for air quality impact monitoring is as follows:

Parameters:	• 1-hour TSP • 24-hour TSP
Frequency:	• 3 times every six days during course of works for 1-hour TSP • Once every 6 days during course of works throughout the construction period for 24-hour TSP
Duration:	• Throughout the construction period

Noise Monitoring

3.4.3 Monitoring frequency for noise impact monitoring is as follows:

Parameters:	• Leq(30min), L10 and L90.
Frequency:	• Leq (30min) in 6 consecutive Leq(5min) for once a week during 07:00-19:00 on normal weekdays • L10 and L90 for reference
Duration:	Throughout the construction period

Water Quality (Marine) Monitoring

3.4.4 Monitoring frequency for water quality impact monitoring is as follows:

Parameters:	In-situ measurements including water depth, Dissolved Oxygen (DO) concentration (mg/L) & saturation (%), Salinity (mg/L), Temperature (ºC) and Turbidity (NTU); and Suspended Solids (mg/L) and Chlorophyll-a (µg/L) are analyzed by HOKLAS-accredited laboratory.
Frequency :	Three days a week, at mid ebb and mid flood tides. The interval between 2 sets of monitoring will be more than 36 hours.
Sampling Depth:	(i.) Three depths: 1m below water surface, 1m above sea bottom and at mid-depth when the water depth exceeds 6m. (ii.) If the water depth is between 3m and 6m, two depths: 1m below water surface and 1m above sea bottom. (iii.) If the water depth is less than 3m, 1 sample at mid-depth is taken
Duration:	During the dredging and sand filling works

3.4.5 In addition to the water quality parameters, other relevant data will also be to measure and record, which are included the location of the sampling stations, water depth, time, weather conditions, sea conditions, tidal stage, current water flow direction and speed, special phenomena and work activities undertaken around the monitoring and works area that may influence the monitoring results. Observations on any special phenomena and work underway at the Project site during the time of sampling will also be to record.

3.5 Monitoring Equipment

Air Quality Monitoring

3.5.1 The 24-hour and 1-hour TSP levels shall be measured by following the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. If the ET proposes to use a direct reading dust meter to measure 1-hour TSP levels, it shall submit sufficient information to the IEC to prove that the instrument is capable of achieving a comparable results to the HVS. The instrument should be calibrated regularly, and the 1-hour sampling shall be determined on yearly basis by the HVS to check the validity and accuracy of the results measured by direct reading method. The filter paper of 24-hour TSP measurement shall be determined by HOKLAS accredited laboratory.

3.5.2 All equipment to be used for impact air quality monitoring is listed in Table 3-6.

Table 3-6 Air Quality Monitoring Equipment

Equipment	Model
24-Hour TSP
High Volume Air Sampler	TISCH High Volume Air Sampler, HVS Model TE-5170
Calibration Kit	TISCH Calibration Kit Mode TE-5025A
1-Hour TSP
Portable Dust Meter	Sibata LD-3B Laser Dust Meter TSI AM510 Laser Dust Monitor

Noise Monitoring

3.5.3 Sound level meter in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications shall be used for carrying out the noise monitoring. The sound level meter shall be checked using an acoustic calibrator. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in ms^-1 for reference.

3.5.4 Noise monitoring equipment to be used for impact monitoring is listed in Table 3-7.

Table 3-7 Construction Noise Monitoring Equipment

Equipment	Model
Integrating Sound Level Meter	Rion NL-31 or Rion NL-52
Acoustic Calibrator	Rion NC-74 or Rion NC-73
Portable Wind Speed Indicator (#)	Anemometer AZ Instrument 8908

(#) Wind speed is reference data only and there is no calibration certificate for portable wind speed indicator.

Water Quality Monitoring

3.5.5 For water quality monitoring, the equipment should fulfill the requirement under the EM&A Manual Section 5.1.1. The requirement is summarized in the following section.

3.5.6 Water quality monitoring equipment to be used for impact monitoring is listed in Table 3-8.

Table 3-8 Water Quality Monitoring Equipment

Equipment	Model
A Digital Global Positioning System	GPS12 Garmin
Water Depth Detector	Eagle Sonar CUDA 300
Water Sampler	A 2-litre transparent PVC cylinder with latex cups at both ends or teflon/stainless steel bailer or self-made sampler
Thermometer & DO meter	YSI Professional Plus Multifunctional Meter
pH meter
Turbidimeter
Salinometer
Current Meter	Valeport Ltd – Model 106 Self Recording/Direct Reading Current Meter
Storage Container	‘Willow’ 33-litre plastic cool box with Ice pad

3.6 Monitoring Procedures

Air Quality

1-hour TSP

3.6.1 Operation of the 1-hour TSP meter will follow manufacturer’s Operation and Service Manual.

3.6.2 The 1-hour TSP monitor, brand named “Sibata LD-3B Laser Dust Meter” or “TSI AM510 Laser Dust Monitor” is a portable, battery-operated laser photometer. The 1-hour TSP meter provides a real time 1-hour TSP measurement based on 90⁰ light scattering. The 1-hour TSP monitor consists of the following:

a. A pump to draw sample aerosol through the optic chamber where TSP is measured;

b. A sheath air system to isolate the aerosol in the chamber to keep the optics clean for maximum reliability; and

c. A built-in data logger compatible with Windows based program to facilitate data collection, analysis and reporting.

3.6.3 The 1-hour TSP meter to be used will be within the valid period, calibrated by the manufacturer prior to purchasing. Zero response of the instrument will be checked before and after each monitoring event. Annually calibration with the High Volume Sampler (HVS) in same condition would be undertaken by the Laboratory.

24-hour TSP

3.6.4 The equipment used for 24-hour TSP measurement is the High Volume Sampler (hereinafter the “HVS”) brand named TISCH, Model TE-5170 TSP High Volume Air Sampler, which complied with EPA Code of Federal Regulation, Appendix B to Part 50. The HVS consists of the following:

a. An anodized aluminum shelter;

b. A 8”x10” stainless steel filter holder;

c. A blower motor assembly;

d. A continuous flow/pressure recorder;

e. A motor speed-voltage control/elapsed time indicator;

f. A 7-day mechanical timer, and

g. A power supply of 220v/50 hz

3.6.5 For HVS for 24-hour TSP monitoring, the HVS is mounted in a metallic cage with a top for protection and also it is sat on the existing ground or the roof of building. The flow rate of the HVS between 0.6m³/min and 1.7m³/min will be properly set in accordance with the manufacturer’s instruction to within the range recommended in EPA Code of Federal Regulation, Appendix B to Part 50. Glass Fiber Filter 8" x 10" of TE-653 will be used for 24-Hour TSP monitoring and would be supplied by laboratory. The general procedures of sampling are described as below:-

Ÿ A horizontal platform with appropriate support to secure the samples against gusty wind should be provided;

Ÿ No two samplers should be placed less than 2 meters apart;

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

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

Ÿ Before placing any filter media at the HVS, the power supply will be checked to ensure the sampler work properly;

Ÿ The filter paper will be set to align on the screen of HVS to ensure that the gasket formed an air tight seal on the outer edges of the filter. Then filter holder frame will be tightened to the filter hold with swing bolts. The holding pressure should be sufficient to avoid air leakage at the edge.

Ÿ The mechanical timer will be set for a sampling period of 24 hours (00:00 mid-night to 00:00 mid-night next day). Information will be recorded on the field data sheet, which would be included the sampling data, starting time, the weather condition at current and the filter paper ID with the initial weight;

Ÿ After sampling, the filter paper will be collected and transfer from the filter holder of the HVS to a sealed envelope and sent to a local HOKLAS accredited laboratory for quantifying.

3.6.6 All the sampled 24-hour TSP filters will be collected and put into the filter envelope provided by the laboratory. The sample will be kept in normal air conditioned room conditions, i.e. 70% HR (Relative Humidity) and 25^oC and delivery to the office within 48 hours and sent to laboratory for analysis. The sampled filter will be kept in the laboratory for six months prior to disposal.

3.6.7 The HVS used for 24-hour TSP monitoring will be calibrated before the commencement for sampling, and after in two months interval for 1 point checking of maintenance and six months interval for five points calibrate in accordance with the manufacturer’s instruction using the NIST-certified standard calibrator (TISCH Calibration Kit Model TE-5025A) to establish a relationship between the follow recorder meter reading in cfm (cubic feet per minute) and the standard flow rate, Qstd, in m³/min. Motor brushes of HVS will be regularly replaced of about five hundred hours per time.

Construction Noise

3.6.8 As referred to in the Technical Memorandum (TM) issued under the NCO, sound level meters in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804:1985 (Type 1) specifications shall be used for carrying out the noise monitoring. Immediately prior to and following each noise measurement the accuracy of the sound level meter shall be checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements may be accepted as valid only if the calibration levels from before and after the noise measurement agree to within 1.0 dB.

3.6.9 All noise measurements will be performed with the meter set to FAST response and on the A-weighted equivalent continuous sound pressure level (Leq). Leq_{(30 min)} in six consecutive Leq_{(5 min)} measurements will be used as the monitoring parameter for the time period between 07:00-19:00 hours on weekdays.

3.6.10 The sound level meter will be mounted on a tripod at a height of 1.2 m and placed at the assessment point and oriented such that the microphone is pointed to the site with the microphone facing perpendicular to the line of sight. The windshield will be fitted for all measurements. Where a measurement is to be carried out at a building, the assessment point would normally be at a position 1 m from the exterior of the building façade. Where a measurement is to be made for noise being received at a place other than a building, the assessment point would be at a position 1.2 m above the ground in a free-field situation, i.e. at least 3.5 m away from reflective surfaces such as adjacent buildings or walls.

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

3.6.12 Noise measurements will not be made in fog, rain, wind with a steady speed exceeding 5m/s or wind with gusts exceeding 10m/s. The wind speed will be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

Water Quality (Marine) Monitoring

3.6.13 Marine water quality monitoring will be conducted at the designated locations in accordance with EM&A Manual. The operating and analytical of sampling procedures are described as below:

Ÿ A Global Positioning System (GPS) will be used to ensure that the correct location was selected prior to sample collection. A portable, battery-operated echo sounder will be used for the determination of water depth at each designated monitoring station.

Ÿ The marine water sampler will be lowered into the water body at a predetermined depth. The trigger system of the sampler is activated with a messenger and opening ends of the sampler are closed accordingly then the sample of water is collected.

Ÿ During the sampling, the sampling container will be rinsed to use a portion of the marine water sample before the water sample is transferred to the container. Upon sampling completion, the container is sealed with a screw cap.

Ÿ Before the sampling process, general information such as the date and time of sampling, weather condition and tidal condition as well as the personnel responsible for the monitoring will be recorded on the monitoring field data sheet.

Ÿ In-situ measurement including water temperature, turbidity, dissolved oxygen, salinity, pH and water depth undertake at the identified monitoring point. At each station, marine water samples are collected at three depths: 1m below water surface, 1m above sea bottom and at mid-depth when the water depth exceeds 6m. Samples at 1m below water surface and 1m above sea bottom are collected when the water depth is between 3m and 6m. Only 1 sample at mid-depth is taken when the water depth is below 3m.

Ÿ For the in-situ measurement, two consecutive measurements of sampling depth, temperature, dissolved oxygen, salinity, turbidity and pH concentration will be measured at the sea. The YSI ProDSS Multifunctional Meter is retrieved out of the water after the first measurement and then re-deployed for the second measurement. Where the difference in the value between the first and second readings of each set is more than 25% of the value of the first reading, the reading is discarded and further readings is taken.

Ÿ Water sample would be collected by a water sampler and then filled in high-density polythene bottles. Before the water sample storage, the sampling bottles will be pre-rinsed with the same water sample. The sample bottles then is packed in cool-boxes (cooled at 4^OC without being frozen), and delivered to HOKLAS accredited laboratory for the chemical analysis as followed APHA Standard Methods.

Ÿ The laboratory has been comprehensive quality assurance and quality control programmes. For QA/QC procedures, one duplicate samples of every batch of 20 samples is analyzed as followed the HOKLAS accredited requirement.

3.6.14 During marine water sampling period, all in-situ measurement equipment will be calibrated at three months interval accordingly. Except for the Current Velocity and Direction water flow meter will be calibrated every two years as recommended by the manufactory. Available calibration certificates will be issued to ensure the performance of equipment to use for in-situ measurement.

3.6.15 Before each round of monitoring, the dissolved oxygen probe will be calibrated by wet bulb method; a zero check in distilled water will be performed with the turbidity and salinity probes; 4 and 10 values of the standard solution will be undertaken to check the accuracy of pH value.

3.6.16 The calibration certificates of monitoring equipment of air quality, construction noise and water quality are shown in Appendix E.

Laboratory Analysis

3.6.17 Chemical analysis will be conducted for all water samples by a HOKALS accredited laboratory - ALS Technichem (HK) Pty Ltd. The chemicals analysis method and reporting limit is shown Table 3-9.

Table 3-9 Testing Method and Reporting Limit of the Chemical Analysis

Parameter	ALS Method Code	In-house Method Reference ^1	Reporting Limit
Total Suspended Solids	EA025	APHA 2540D	2 mg/L
Chlorophyll-a	EP008F	APHA 10200 H2&H3	0.1 μg/L

Note:

1. The exact method shall depend on the laboratory accredited method. APHA = Standard Methods for the Examination of Water and Wastewater by the American Public Health Association.

3.7 Meteorological Information

3.7.1 The meteorological information including wind direction, wind speed, humidity, rainfall, air pressure and temperature etc. during impact monitoring is extracted from the closest Hong Kong Observatory Station. To obtain the most appropriate meteorological information where available, Air Temperature/Pressure and Relative Humidity will be extracted from Tai Po Station and wind speed and direction will be extracted from Tai Mei Tuk Station.

3.8 Determination of Action/Limit (A/L) Levels

3.8.1 The baseline results form the basis for determining the environmental acceptance criteria for the impact monitoring. A summary of the Action/Limit (A/L) Levels for air quality, construction noise and water quality are shown in Table 3-10, 3-11 and 3-12 respectively.

Table 3-10 Action and Limit Levels for Air Quality

Monitoring Station	Action Level (mg /m^3)		Limit Level (mg/m^3)
	1-hour TSP	24-hour TSP	1-hour TSP	24-hour TSP
A4	275	142	500	260
A7	274	141	500	260

Table 3-11 Action and Limit Levels for Construction Noise

Time Period	Action Level in dB(A)	Limit Level in dB(A)
0700-1900 hours on normal weekdays	When one documented complaint is received	75 dB(A)

Table 3-12 Action and Limit Levels for Water Quality

Monitoring Location	Depth Average of SS (mg/L)
	Action Level		Limit Level
I1	7.0	OR 120% of any reference stations at the same tide of the same day	7.5	OR 130% of any reference stations at the same tide of the same day
I2	7.0		8.1
I3	8.3		15.0
W1	8.0		8.6
M1	10.0		11.0
FCZ1	7.0		8.0
Monitoring Location	Chlorophyll-a (μg/L)
	Surface, Middle & Bottom
	Action Level		Limit Level
I1	11.1		12.1
I2	11.0		13.1
I3	11.3		14.5
W1	11.3		16.1
M1	16.9		42.4
FCZ1	11.8		12.5

Monitoring Location	Dissolved Oxygen (mg/L)
	Depth Average of Surface and Mid-depth		Bottom
	Action Level	Limit Level	Action Level	Limit Level
I1	5.08	4.80	N/A	N/A
I2	5.26	4.88	3.64	3.37
I3	5.03	4.77	4.09	3.19
W1	4.67	4.54	2.41	2.33
M1	4.73	4.70	N/A	N/A
FCZ1	5	5	3.43	3.18

Monitoring Location	Depth Average of Turbidity (NTU)
	Action Level		Limit Level
I1	2.8	OR 120% of any reference stations at the same tide of the same day	2.9	OR 130% of any reference stations at the same tide of the same day
I2	3.5		7.7
I3	2.6		3.0
W1	2.9		3.3
M1	5.2		6.6
FCZ1	3.2		3.4

Notes:

(a) For DO, non-compliance of water quality limits occurs when monitoring result is lower than the limits

(b) For SS, chlorophyll-a and turbidity, non-compliance of the water quality limits occurs when monitoring result is higher than the limits.

(c) Both Action and Limit Levels for DO (surface and middle) in the FCZ1 are less than 5 mg/L.

Event Action Plan

3.8.2 Should non-compliance of the environmental quality criteria occurs, remedial actions will be triggered according to the Event and Action Plan which presented in Appendix F.

3.9 Data Management and Data QA/QC Control

3.9.1 The impact monitoring data were handled by the ET’s in-house data recording and management system.

3.9.2 The monitoring data recorded in the equipment were downloaded directly from the equipment at the end of each monitoring day. The downloaded monitoring data were input into a computerized database properly maintained by the ET. The laboratory results were input directly into the computerized database and checked by personnel other than those who input the data.

3.9.3 For monitoring parameters that require laboratory analysis, the local laboratory shall follow the QA/QC requirements as set out under the HOKLAS scheme for the relevant laboratory tests.

4. Air Quality Monitoring

4.1 General

4.1.1 In the Reporting Period, air quality monitoring were performed at the proposed monitoring locations A4 and A7. The air quality monitoring schedule is presented in Appendix G and the monitoring results are summarized in the following sub-sections.

4.2 Results of Air Quality Monitoring

4.2.1 In the Reporting Period, 6 sessions of 1-hour TSP and 5 sessions of 24-hours TSP monitoring were carried out and the monitoring results are summarized in Tables 4-1 to 4-4. The detailed 24-hour TSP monitoring data are presented in Appendix H and the relevant graphical plots are shown in Appendix I.

Table 4-1 Summary of 24-hour and 1-hour TSP Monitoring Results (A4)

Date	24-hour TSP (mg/m^3)	1-hour TSP (mg/m^3)
		Date	Start Time	1^st reading	2^nd reading	3^rd reading
5-Mar-18	30	3-Mar-18	9:44	54	56	62
10-Mar-18	57	6-Mar-18	9:58	37	39	44
16-Mar-18	52	12-Mar-18	9:17	35	38	37
22-Mar-18	31	17-Mar-18	9:40	47	51	55
28-Mar-18	59	23-Mar-18	9:44	55	57	64
Average (Range)	46 (30 – 59)	29-Mar-18	9:40	62	66	73
		Average (Range)		52 (35 – 73)

Table 4-2 Summary of 24-hour and 1-hour TSP Monitoring Results (A7)

Date	24-hour TSP (mg/m^3)	1-hour TSP (mg/m^3)
		Date	Start Time	1^st reading	2^nd reading	3^rd reading
5-Mar-18	38	3-Mar-18	9:36	53	59	65
10-Mar-18	52	6-Mar-18	9:50	34	38	43
16-Mar-18	52	12-Mar-18	13:02	32	36	38
22-Mar-18	46	17-Mar-18	9:39	46	52	57
28-Mar-18	40	23-Mar-18	9:33	54	62	65
Average (Range)	46 (38 – 52)	29-Mar-18	9:29	67	74	83
		Average (Range)		53 (32– 83)

4.2.2 As shown in Tables 4-1 to 4-2, all the 1-hour TSP and 24-hour TSP monitoring results were below the Action/Limit Levels. No Notification of Exceedance (NOE) was issued in this Reporting Period.

4.2.3 The meteorological data during the impact monitoring period are summarized in Appendix J.

5. Construction Noise Monitoring

5.1 General

5.1.1 In the Reporting Period, construction noise quality monitoring were performed at the designated monitoring locations N1, N2a, N3a and N4. The noise quality monitoring schedule is presented in Appendix G and the monitoring results are summarized in the following sub-sections.

5.2 Results of Noise Monitoring

5.2.1 In the Reporting Period, 4 sessions of noise monitoring were carried out at the designated locations. Free-field status were performed at N1 and N3a and façade correction (+3 dB(A)) has been added for the correction in according to the acoustical principles and EPD guidelines. The noise monitoring results at the designated locations are summarized in Tables 5-1 to 5-4. The detailed noise monitoring data are presented in Appendix H and the relevant graphical plots are shown in Appendix I.

Table 5-1 Construction Noise Monitoring Results of N1

Date	N1 (dB(A))
	Start Time	Leq30min	*Corrected Leq30min
6-Mar-18	10:32	56	59
12-Mar-18	9:52	44	47
23-Mar-18	10:19	56	59
29-Mar-18	10:12	59	62

Remark:

(*) A façade correction of +3dB(A) has been added according to acoustical principles and EPD guidelines.

Table 5-2 Construction Noise Monitoring Results of N2a

Date	N2a (dB(A))
	Start Time	Leq30min
6-Mar-18	10:01	57
12-Mar-18	9:21	45
23-Mar-18	9:48	57
29-Mar-18	9:41	59

Table 5-3 Construction Noise Monitoring Results of N3a

Date	N3a (dB(A))
	Start Time	Leq30min	*Corrected Leq30min
6-Mar-18	11:07	52