Issues	Environmental Monitoring Parameters / Inspection	Occasions
Construction Noise	L_eq_(30min) Daytime	3
Water Quality	Marine Water Sampling	9
Total Residual Chlorine of In Situ Measurement	NA
Inspection / Audit	ET Regular Environmental Site Inspection	3
IEC Monthly Environmental Site Audit	1

1. Introduction

Project Background

1.1 Water Supplies Department (hereafter referred as “WSD”) is the Project Proponent and the Permit Holder of Improvement of Fresh Water Supply to Cheung Chau (hereinafter referred as “the Project”), which is a Designated Project to be implemented under Environmental Permit number EP-392/2010/B (hereinafter referred as “the EP-392/2010/B” or “the EP”).

1.2 The scope of the works comprises primarily the laying of a new submarine fresh water main across the Adamasta Channel from Lantau Island to Cheung Chau by horizontal directional drilling method to enhance the reliability of fresh water supply to Cheung Chau. The Works is commenced on 28 March 2014 and predicted to be undertaken about 24 months. The layout plan of project is shown in Appendix A.

1.3 Action-United Environmental Services and Consulting (AUES) has been appointed as the independent environmental team (ET) to implement the relevant EM&A programme of Water Supplies Department (WSD) Contract No. 1/WSD/13 – Improvement of Fresh Water Supply to Cheung Chau. In the Project, China Road - China Pipeline Joint Venture (hereinafter “CRCPJV”) is a main-contractor, SMEC Asia Limited as an Independent Environmental Checker (IEC), and Black & Veatch Hong Kong Limited is the representative engineer on site to manage the Project.

1.4 According to the Particular Specification (PS) Section 25 and the EP-392/2010/B, overall scope of environmental monitoring including construction noise and water quality, and site environmental audit should be undertaken in accordance with the provided Environmental Monitoring and Audit Manual by an independent Environmental Team (ET).

1.5 The baseline monitoring program was carried out during the period between 4 January and 31 January 2014 at the designated monitoring locations by the ET according to the EM&A Manual. The “Baseline Monitoring Report (R0014 Version 3)” had submitted to EPD before commencement of major construction works and approved by the IEC on 21 February 2014. Further to CRCPJV’s instructions, the EM&A program was commenced on 1 April 2014 and the monitoring schedule had been issued to relevant parties on 28 March 2014.

1.6 According to the construction information provided by the Contractor, Section 1 of works of the captioned project has been substantially completed and Certification of Completion for Section 1 of the works was issued on 29 May 2017. As agreed by the RE, IEC, Contractor and ET, the construction phase EM&A programme was terminated on 23 July 2017 and the 4-week post project marine water quality monitoring was immediately commenced on 24 July 2017 as required in Section 2.7.3 of the EM&A Manual. In this regards, an associated letter ref. TCS005684/13/300/L0343 date 21 July 2017 has been issued to EPD for approval and no adverse comment was received. The result of 4-week post project marine water quality monitoring will be provided separately and is not included in this EM&A report.

1.7 This is the last (40^th) monthly Environmental Monitoring and Audit Report for July 2017 covering the period from 1^st to 31^st July 2017 (the Reporting Month).

Report Structure

1.8 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 Monitoring Requirements

Section 4 Impact Monitoring Results

Section 5 Waste Management

Section 6 Site Inspections

Section 7 Environmental Complaints and Non-Compliance

Section 8 Implementation Statues of Mitigation Measures

Section 9 Conclusions

2. Project Organization and Construction progress

Project Organization and Management Structure

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

Construction Progress

2.2 The layout plans with location of construction activities carried out are enclosed in Appendix A, the master and three month rolling construction programs are enclosed in Appendix C, and the major construction activities undertaken in this Reporting Month and their potential environmental impacts are listed below:-

Table 2-1 Construction activities and potential environmental impacts in Reporting Month

Construction Activities	Potential Environmental Impact(s)	Environmental protection/mitigation measures
No Construction Work	NA	NA

Summary of Environmental Submissions

2.3 Summary of the relevant permits, licences, and/or notifications on environmental protection for this Project in this Reporting Month is presented in Table 2-2.

Table 2-2 Status of Environmental Licenses and Permits

Item	Description	License/Permit Status
1	Air pollution Control (Construction Dust)	Notified EPD on 28/10/2013 Ref. no. 366253
2	Chemical waste Producer Registration	Application date: 20/12/2013 Date approved: 30/01/2014 WPN: 8334-920-C3839-01
3	Water Pollution Control Ordinance (Discharge License)	Application date: 03/01/2014 License no. WT00018191-2014 Valid to 28/02/2019
4	Billing Account for Disposal of Construction Waste	Application no. :RS01134 Date approved: 1/11/2013 Account Number: 7018602

2.4 Baseline Monitoring Report (TCS00684/13/600/R0014Ver.3) for the Project was issued by the ETL and verified by the IEC on 24 March 2014. The report was also submitted to the EPD for endorsement.

2.5 According to Clause 3.9 EP-392/2010/B stipulation, the detailed proposal of the HDD technique and the management of the drilling fluid for construction of the Project were submitted on 9 July 2014.

2.6 According to Clause 4.3 EP-392/2010/B stipulation, the detailed proposal of the cleaning and sterilization process of the Project were submitted on 19 October 2016.

3. Summary of Monitoring Requirements

General

3.1 The Environmental Monitoring and Audit requirements are set out in the Approved EM&A manual. Environmental aspects such as the construction noise and marine water quality were identified as the key issues during the construction phase of the Project. The detailed requirements are presented in the sub-sections below.

Monitoring Parameters

3.2 The EM&A baseline and impact monitoring program covers the following environmental issues:

• Construction noise; and

• Marine Water quality

3.3 A summary of the monitoring parameters is presented in Table 3-1:

Table 3-1 Summary of the monitoring parameters of EM&A Requirements

Environmental Issue	Parameters
Marine Water Quality	In-situ Measurements • Dissolved Oxygen Concentration (mg/L); • Dissolved Oxygen Saturation (% ); • Turbidity (NTU); • pH value; • Salinity (ppt); • Water depth (m); • Temperature (ºC); and • # Total residual chlorine (TRC) (mg/L)
Marine Water Quality	Laboratory Analysis • Suspended Solids (mg/L)
Noise	• L_eq_(30min) during normal working hours; and • L_eq₍_5min) during Restricted Hours.

Monitoring Location

Water Quality

3.4 Two control stations (W8 and W9) and seven impact stations (W1-W7) were recommended in the EM&A Manual Section 2.5. Detailed and co-ordinance of water quality monitoring stations is described in Table 3-2 and the graphical is shown in Appendix D.

Table 3-2 Location of Marine Water Quality Monitoring Station

Station	Description	Co-ordinance
Station	Description	Easting	Northing
W1	Impact Station – Marine waters near the proposed launching site at Cheung Chau	820 704	808 688
W2	Impact Station – Marine waters near the proposed launching site at Cheung Chau	820 656	808 631
W3	Impact Station – Marine waters along the proposed water main alignment	820 445	809 036
W4	Impact Station – Marine waters along the proposed water main alignment	820 072	809 297
W5	Impact Station – Marine waters near the proposed reception site at Lantau	819 875	809 700
W6	Impact Station – Marine waters near the Cheung Sha Wan Fish Culture Zone	819 174	810 917
W7	Impact Station – Marine waters between the works and the Cheung Sha Wan Fish Culture Zone	820 055	810 523
W8	Control station – Marine waters of Adamasta Channel	821 328	810 240
W9	Control station – Marine waters of Adamasta Channel	819 045	807 953

Construction Noise

3.5 According to EM&A Manual Section 6.4, only one noise sensitive receiver (NSR) is designated for the construction noise monitoring. The detailed construction noise monitoring station to under the Project is described in Table 3-3 and graphical is shown in Appendix D.

Table 3-3 Location of Construction Noise Monitoring Station

Noise Monitoring Station	NSR ID	Location
N1	NSR2	Village house at No. 1A Tai Kwan Wan San Tsuen

Monitoring Frequency and Period

3.6 The requirements of impact monitoring are stipulated in Sections 2.6 and 2.7 of the EM&A Manual and listed as follows.

Construction Noise Monitoring

Parameters : One set of Leq(30min) as 6 consecutive Leq(5min) between 0700-1900 hours on normal weekdays

Frequency : Once every week

Duration : Throughout the construction period

Water Quality (Marine) Monitoring

Parameters	:	In-situ measurements including water depth, temperature, DO, pH, turbidity and salinity; and Suspended Solids is 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	:	Throughout the construction period

Monitoring Equipment

Water Quality Monitoring

i. Dissolved Oxygen and Temperature Measuring Equipment – The instrument should be a portable and weatherproof dissolved oxygen (DO) measuring instrument complete with cable and sensor, and use a DC power source. The equipment should be capable of measuring as included a DO level in the range of 0 – 20 mgL^-1and 0 – 200% saturation; and a temperature of 0 – 45 degree Celsius.

ii. pH Meter – The instrument shall consist of a potentiometer, a glass electrode, a reference electrode and a temperature-compensating device. It shall be readable to 0.1 pH in arrange of 0 to 14.

iii. Turbidity (NTU) Measuring Equipment – The instrument should be a portable and weatherproof turbidity measuring instrument using a DC power source. It should have a photoelectric sensor capable of measuring turbidity between 0 - 1000 NTU.

iv. Water Sampling Equipment – A water sampler should comprise a transparent PVC cylinder, with a capacity of not less than 2 litres, which can be effectively sealed with latex cups at both ends. The sampler should have a positive latching system to keep it open and prevent premature closure until released by a messenger when the sampler is at the selected water depth.

v. Water Depth Detector – A portable, battery-operated echo sounder should be used for the determination of water depth at each designated monitoring station. This unit can either be hand held or affixed to the bottom of the work boat.

vi. Salinity Measuring Equipment – A portable salinometer capable of measuring salinity in the range of 0 - 40 parts per thousand (ppt) should be provided for measuring salinity of the water at each monitoring location.

vii. Sample Containers and Storage – Water samples for SS should be stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4°C without being frozen).

viii. Monitoring Position Equipment - A hand-held or boat-fixed type digital Differential Global Positioning System (DGPS) with way point bearing indication and Radio Technical Commission for maritime (RTCM) Type 16 error message ‘screen pop-up’ facilities (for real-time auto-display of error messages and DGPS corrections from the Hong Kong Hydrographic Office), or other equipment instrument of similar accuracy, should be provided and used during marine water monitoring to ensure the monitoring vessel is at the correct location before taking measurements.

ix. Suspended Solids Analysis – Analysis of suspended solids shall be carried out in a HOKLAS or other international accredited laboratory.

Noise Monitoring

3.7 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.

3.8 The monitoring equipment using for the EM&A program were proposed by the ET and verified by the IEC prior to the commencement of the monitoring. Details of the equipment used for impact monitoring are listed in Table 3-4 below.

Table 3-4 Monitoring Equipment Used in EM&A Program

Equipment	Model
*Construction Noise*
Integrating Sound Level Meter	B&K Type 2238
Calibrator	Rion NC - 74
Portable Wind Speed Indicator	Testo Anemometer
*Water quality*
A Digital Global Positioning System	GPS12 Garmin
Water Depth Detector	Eagle Sonar
Water Sampler	A 2-litre transparent PVC cylinder with latex cups at both ends
Thermometer & DO meter	YSI Professional Plus Digital Sampling System Water Quality Meter
pH meter
Salinometer
Turbidimeter	Hach 2100Q Portable Turbidimeter
Sample Container	High density polythene bottles (provided by laboratory)
Storage Container	‘Willow’ 33-litter plastic cool box with Ice pad
Suspended Solids	HOKLAS-accredited laboratory (ALS Technichem (HK) Pty Ltd)
Total residual chlorine	HANNA HI96724C Free & Total Chlorine ISM

Monitoring Methodology

Water Quality

3.9 Water quality monitoring is conducted at the designated locations. The sampling produce with the in-situ monitoring are presented as below:

Sampling Procedures

3.10 A Digital Global Positioning System (GPS) is used to identify the designated monitoring stations prior to water sampling. A portable, battery-operated echo sounder is used for the determination of water depth at each station. At each station, marine water sample is 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.

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

3.12 The sample container is rinsed with a portion of the water sample. The water sample then is transferred to the high-density polythene bottles as provided by the laboratory, labeled with a unique sample number and sealed with a screw cap.

3.13 Before commencement of the sampling, general information such as the date and time of sampling, weather condition and tidal condition as well as the personnel responsible for the monitoring are to be recorded on the monitoring field data sheet.

3.14 A ‘Willow’ 33-litter plastic cool box packed with ice is used to preserve the collected water samples prior to arrival at the laboratory for chemical determination. The water temperature of the cool box is maintained at a temperature as close to 4⁰C as possible without being frozen. Samples collected are delivered to the laboratory upon collection

In-situ Measurement

Positioning of Monitoring Locations

3.15 A digital Global Positioning System (GPS) is used during marine water monitoring to ensure the monitoring vessel is at the correct location when taking measurement and samples.

Depth, Dissolved Oxygen (DO), Temperature, Turbidity, Salinity and pH value

3.16 The YSI ProDSS Digital Sampling System Water Quality Meter are used for marine water in-situ measures, which automates the measurements and data logging of depth, temperature, dissolved oxygen, dissolved oxygen saturation, turbidity, pH and salinity simultaneously. Before each round of monitoring, the dissolved oxygen probe is calibrated by the wet bulb method and the turbidity and salinity probes checked with distilled water.

Total Residual Chlorine

3.17 Total residual chlorine is measured in-situ using approved test kit HANNA HI96724C Free & Total Chlorine ISM at the effluent discharge point. When de-chlorinated water is being discharged, Total Residual Chlorine measurement is conducted continuous hourly.

Laboratory Analysis

3.18 All water samples are analyzed with Suspended Solids (SS) as specified in the EM&A Manual by a local HOKLAS-accredited testing laboratory (ALS Technichem (HK) Pty Ltd HOKLAS registration no. 66). SS analysis is determined by the laboratory upon receipt of the water samples using HOKLAS accredited analytical methods namely ALS Method EA-025. The HOKLAS accredited certificate of laboratory is provided in Appendix E.

Construction Noise

3.19 Noise measurements were taken in terms of the A-weighted equivalent sound pressure level (L_eq) measured in decibels (dB(A)). Supplementary statistical results (L₁₀ and L₉₀) were also obtained for reference.

3.20 Sound level meters listed in Table 3-4 are complied with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications, as recommended in Technical Memorandum (TM) issued under the Noise Control Ordinance (NCO).

3.21 During the monitoring, all noise measurements were performed with the meter set to FAST response and on the A-weighted equivalent continuous sound pressure level(L_eq). Leq_(30min) in six consecutive Leq_(5min) measurements were used as the monitoring parameter for the time period between 0700-1900 hours on weekdays; and also Leq_(15min) in three consecutive Leq_(5min)measurements is used as monitoring parameter for other time periods (e.g. during restricted hours), if necessary.

3.22 During the measurement, the sound level meter is mounted on a tripod with a height of 1.2m above ground 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 is fitted for all measurements. The assessment point is normally set as free-field situation for the measurement.

3.23 Prior of noise measurement, the accuracy of the sound level meter is checked using an acoustic calibrator generating a known sound pressure level at a known frequency. The checking was performed before and after the noise measurement.

Equipment Calibration

3.24 The sound level meter and calibrator are calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme at yearly basis.

3.25 The Multi-parameter Water Quality Monitoring System is calibrated by HOKLAS accredited laboratory of three month intervals.

3.26 All updated calibration certificates of the monitoring equipment used for the impact monitoring program in this Reporting Month are attached in Appendix E.

Meteorological Information

3.27 The meteorological information during the construction phase is obtained from Cheung Chau Station of the Hong Kong Observatory (HKO).

Data Management and Data QA/QC Control

3.28 The impact monitoring data are handled by the ET’s systematic data recording and management, which complies with in-house Quality Management System. Standard Field Data Sheets (FDS) are used in the impact monitoring program.

3.29 The monitoring data recorded in the equipment e.g. noise meter and Multi-parameter Water Quality Monitoring System are downloaded directly from the equipment at the end of each monitoring day. The downloaded monitoring data are input into a computerized database properly maintained by the ET. The laboratory results are input directly into the computerized database and QA/QC checked by personnel other than those who input the data. For monitoring activities require laboratory analysis, the local laboratory follows the QA/QC requirements as set out under the HOKLAS scheme for all laboratory testing.

Determination of Action/Limit (A/L) Levels

3.30 According to the approved Environmental Monitoring and Audit Manual, the construction noise and water quality criteria were set up, namely Action and Limit levels are listed in Tables 3-5 and 3-6 as below.

Table 3-5 Action and Limit Levels for Water Quality

Impact Station	Dissolved Oxygen (mg/L)				Depth Average of Turbidity (NTU)		Depth Average of SS (mg/L)
	Depth Average of Surface & Middle		Bottom		Depth Average of Turbidity (NTU)		Depth Average of SS (mg/L)
	Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level
W1	5.64	4.54	NA	NA	5.87	8.81	7.00	8.00
W2	5.16	5.02	NA	NA	5.50	5.66	7.00	8.00
W3	6.18	5.66	5.36	5.05	6.94	7.29	8.00	8.00
W4	5.94	4.95	5.71	5.54	7.50	8.03	7.85	11.57
W5	5.14	5.00	5.79	5.79	5.44	7.43	6.00	6.43
W6	5.92	4.26	6.04	4.49	6.82	7.10	8.00	9.59
W7	6.08	5.78	6.08	5.60	5.71	6.26	7.85	10.00

Table 3-6 Action and Limit Levels for Construction Noise

Monitoring Location	Action Level	Limit Level in dB(A)
Monitoring Location	Time Period: 0700-1900 hours on normal weekdays
N1	When one or more documented complaints are received	75 dB(A)

If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the NCA have to be followed.

3.31 Furthermore, Action/Limit Levels of Total residual chlorine is 0.2mg/L as stipulated by EM&A Manual. Discharge of dechlorinated water must be suspended if the total residual chlorine exceeds 0.2 mg/L and the water should be circulated to a standby tank for further dechlorination and testing.

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

4. Impact monitoring Results

4.1 The monitoring schedule of July 2017 had been issued to relevant parties on 29 June 2017 and listed in Appendix G. The works undertaken during the report month has been illustrated in Appendix C. The monitoring results are presented in the following sub-sections.

Results of Water Quality Monitoring

4.2 In this Reporting Month, a total of 9 sampling days perform marine water monitoring at the nine designated locations. Monitoring results of 3 key parameters: dissolved oxygen (DO), turbidity and suspended solids in this Reporting Month, are summarized in Tables 4-1 and 4-4.

Table 4-1 Results Summary of Depth Average (Surface & Middle Layer) of DO (mg/L)

Tidal	Sampling date	W1	W2	W3	W4	W5	W6	W7	W8	W9
Mid-Ebb	4-Jul-17	7.85	7.88	7.01	7.43	7.98	7.95	8.26	7.64	7.48
	6-Jul-17	8.33	8.51	7.78	7.72	8.32	8.55	8.54	7.86	7.86
	8-Jul-17	5.89	5.91	6.22	6.13	6.24	6.26	6.18	6.22	5.53
	10-Jul-17	6.87	7.01	6.42	6.34	6.71	7.06	6.56	6.36	6.71
	12-Jul-17	14.68	14.78	11.61	11.59	15.14	11.07	12.02	11.54	12.29
	14-Jul-17	6.67	6.53	6.61	6.62	6.50	6.64	6.68	6.66	6.67
	18-Jul-17	7.21	7.30	6.79	6.84	6.93	7.74	7.24	6.68	6.94
	20-Jul-17	8.73	8.85	7.97	8.43	8.55	8.24	8.33	8.14	8.00
	22-Jul-17	8.58	8.29	8.13	7.85	7.79	7.77	8.02	8.12	7.81
Mid-Flood	4-Jul-17	8.51	8.33	7.84	7.90	8.32	8.55	8.54	7.86	7.86
	6-Jul-17	7.85	7.88	6.93	7.98	7.98	8.10	8.26	7.64	7.48
	8-Jul-17	6.02	6.06	6.32	6.31	6.01	6.01	6.18	6.19	5.87
	10-Jul-17	6.47	6.36	6.67	6.70	6.32	6.65	6.64	6.61	6.67
	12-Jul-17	15.08	14.89	11.48	11.84	14.42	11.15	11.56	11.69	11.58
	14-Jul-17	6.23	6.23	6.55	6.56	6.23	6.34	6.33	6.04	6.25
	18-Jul-17	7.49	7.52	6.97	6.90	7.00	6.68	6.94	7.12	7.22
	20-Jul-17	9.00	9.11	8.41	8.56	8.94	8.27	8.19	8.09	8.08
	22-Jul-17	8.20	7.99	8.10	7.63	7.93	8.07	8.02	8.04	7.96

Table 4-2 Results Summary of Bottom Depth of DO (mg/L)

Tidal	Sampling date	W1	W2	W3	W4	W5	W6	W7	W8	W9
Mid-Ebb	4-Jul-17	NA	NA	6.05	6.15	7.17	6.86	7.42	6.48	6.22
	6-Jul-17	NA	NA	6.16	6.65	8.13	6.59	7.58	6.60	6.90
	8-Jul-17	NA	NA	6.06	5.94	6.09	6.09	6.09	6.09	4.99
	10-Jul-17	NA	NA	6.09	5.80	6.39	6.32	6.41	5.36	5.76
	12-Jul-17	NA	NA	6.65	6.59	6.97	6.78	6.95	7.01	6.95
	14-Jul-17	NA	NA	6.66	6.66	6.62	6.66	6.65	6.67	6.65
	18-Jul-17	NA	NA	6.41	6.49	6.93	7.15	6.64	6.60	6.36
	20-Jul-17	NA	NA	5.79	5.85	7.12	6.90	6.68	6.65	5.55
	22-Jul-17	NA	NA	6.40	7.27	6.39	6.11	6.57	6.92	6.13
Mid-Flood	4-Jul-17	NA	NA	6.80	6.88	8.13	6.54	7.58	6.60	6.83
	6-Jul-17	NA	NA	6.02	6.84	7.17	6.82	7.42	6.89	6.94
	8-Jul-17	NA	NA	6.04	6.03	6.06	6.07	6.12	6.12	5.69
	10-Jul-17	NA	NA	6.40	6.40	6.23	6.42	6.49	6.51	6.40
	12-Jul-17	NA	NA	6.57	6.02	7.27	6.66	6.43	6.43	6.23
	14-Jul-17	NA	NA	6.49	6.51	6.33	6.30	6.29	6.00	6.17
	18-Jul-17	NA	NA	6.50	6.49	6.78	6.60	6.36	6.55	6.53
	20-Jul-17	NA	NA	6.89	6.25	7.86	6.97	7.12	5.46	5.67
	22-Jul-17	NA	NA	6.83	7.40	7.31	7.18	7.43	7.30	6.64

Table 4-3 Results Summary of Depth Average of Turbidity (NTU)

Tidal	Sampling date	W1	W2	W3	W4	W5	W6	W7	W8	W9
Mid-Ebb	4-Jul-17	2.80	2.67	3.03	3.14	2.62	3.22	2.48	2.72	2.79
	6-Jul-17	2.78	2.32	2.60	2.81	2.81	2.48	2.49	2.63	2.69
	8-Jul-17	3.45	4.36	5.88	5.54	4.33	3.73	5.05	5.06	4.56
	10-Jul-17	3.95	3.99	4.26	4.29	4.02	4.08	4.22	4.36	4.50
	12-Jul-17	3.59	3.75	3.13	2.98	3.74	3.02	3.73	2.55	3.22
	14-Jul-17	2.34	2.02	3.25	3.41	2.19	3.30	3.33	3.20	3.42
	18-Jul-17	0.16	0.12	0.09	0.12	0.90	0.11	0.16	0.36	0.13
	20-Jul-17	1.46	0.52	0.39	1.00	0.41	1.18	3.69	4.57	0.73
	22-Jul-17	0.51	0.54	1.27	0.45	0.55	0.59	0.58	0.51	0.61
Mid-Flood	4-Jul-17	2.32	2.78	2.63	2.76	2.81	2.48	2.49	2.63	2.69
	6-Jul-17	2.80	2.67	3.03	3.14	2.62	3.05	2.48	2.72	2.79
	8-Jul-17	4.43	4.30	4.66	4.77	4.25	4.68	4.11	4.35	4.42
	10-Jul-17	4.59	5.17	4.66	5.37	5.39	2.03	2.95	2.74	4.68
	12-Jul-17	4.58	3.67	3.13	3.15	3.94	2.96	3.04	3.03	3.39
	14-Jul-17	2.25	4.13	2.79	2.88	2.77	1.27	1.20	0.91	3.28
	18-Jul-17	0.14	0.15	0.14	0.14	0.51	0.88	0.88	0.88	0.03
	20-Jul-17	3.62	5.32	1.16	1.39	0.45	0.39	2.42	2.73	0.45
	22-Jul-17	0.63	0.62	0.56	0.59	0.59	0.56	0.58	0.56	0.79

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

Tidal	Sampling date	W1	W2	W3	W4	W5	W6	W7	W8	W9
Mid-Ebb	4-Jul-17	3.00	3.00	3.33	3.50	3.50	3.67	4.17	4.33	4.00
	6-Jul-17	3.00	4.50	3.83	2.83	3.50	3.33	3.17	3.33	3.17
	8-Jul-17	4.00	3.00	3.00	3.33	4.50	5.00	4.50	5.00	5.50
	10-Jul-17	6.00	7.00	7.33	6.00	5.50	7.00	7.67	7.33	8.67
	12-Jul-17	6.50	7.00	5.50	5.50	5.50	5.67	7.17	10.00	9.17
	14-Jul-17	3.00	2.50	3.50	2.67	5.75	3.83	3.33	3.83	3.50
	18-Jul-17	4.00	6.50	6.83	4.50	2.75	3.33	3.00	4.33	4.67
	20-Jul-17	5.50	4.00	4.83	4.67	3.25	4.67	5.17	4.83	3.17
	22-Jul-17	4.00	3.50	3.50	4.33	5.75	4.50	5.00	5.00	4.67
Mid-Flood	4-Jul-17	4.00	5.00	4.67	3.00	3.25	2.83	2.50	3.50	3.17
	6-Jul-17	2.00	1.50	3.00	3.00	3.25	4.33	4.67	3.83	4.17
	8-Jul-17	4.50	5.50	6.67	6.33	4.25	5.83	3.33	3.83	3.33
	10-Jul-17	5.50	5.50	6.50	6.83	5.50	7.33	7.33	6.50	6.33
	12-Jul-17	6.50	6.00	5.50	5.67	5.00	4.83	5.83	5.50	4.33
	14-Jul-17	3.00	3.50	3.50	3.33	3.25	3.33	3.33	3.83	2.83
	18-Jul-17	4.00	4.50	4.83	5.00	4.50	5.50	4.33	5.50	5.17
	20-Jul-17	3.50	3.00	4.67	3.67	4.50	3.67	3.67	3.83	4.83
	22-Jul-17	3.50	3.50	5.00	4.33	5.75	4.50	4.50	4.50	4.00

Remark: If the monitoring result is less than 1, the average was calculated by assuming the measurement value to be 1.

Italic and bold value indicated Action Level exceedance

Underlined and bold value indicated Limit Level exceedance

4.3 During the Reporting Period, field measurements showed that temperatures of marine water were within 26.5°C to 29.4°C; the salinity concentrations within 18.12 to 31.44 ppt and pH values within 8.29 to 12.33

4.4 The monitoring results including in-situ measurements and laboratory testing results are provided in Appendix H. The graphical plots are shown in Appendix I.

4.5 A summary of exceedances for the three parameters: dissolved oxygen (DO), turbidity and suspended solids is shown in Table 4-5.

Table 4-5 Summary of Water Quality Exceedance

Station	DO (Ave of Top & mid-depth)		DO Bottom Depth		Turbidity (Depth Ave.)		SS (Depth Ave)		Total Exceedance
Station	Action	Limit	Action	Limit	Action	Limit	Action	Limit	Action	Limit
W1	0	0	0	0	0	0	0	0	0	0
W2	0	0	0	0	0	0	0	0	0	0
W3	0	0	0	0	0	0	0	0	0	0
W4	0	0	0	0	0	0	0	0	0	0
W5	0	0	0	0	0	0	0	0	0	0
W6	0	0	0	0	0	0	0	0	0	0
W7	0	0	0	0	0	0	0	0	0	0
No of Exceedance	0	0	0	0	0	0	0	0	0	0

4.6 In this Reporting Month, no Action and Limit Level exceedances recorded in water quality recorded.

Results of In Situ Total Residual Chlorine Measurement

4.7 Since cleaning and sterilization of watermain was carried out and finished in January 2017, no de-chlorinated water was discharged in this reporting period and no in-situ Total residual chlorine measurement was conducted.

Results of Construction Noise Monitoring

4.8 Total 3 occasions construction noise monitoring was undertaken in Reporting Period. The noise monitoring results at the designated location (N1) are summarized in Table 4-6.

Table 4-6 Summary of Construction Noise Monitoring Results – N1

Date	Start Time	1^st Leq_5min	2^nd Leq_5min	3^rd Leq_5min	4^th Leq_5min	5^th Leq_5min	6^th Leq_5min	Leq_30min	*Corrected Leq_30min**
4-Jul-17	13:16	55.4	55.7	53.2	54.9	54.5	54.6	54.8	58.0
14-Jul-17	13:47	54.9	52.3	52.7	51.9	52.7	51.5	52.8	56.0
22-Jul-17	14:11	52.3	53.4	52.9	53.4	55.7	54.2	53.8	57.0
Limit Level		-						> 75 dB(A)

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

4.9 As shown in the results were well below 75dB(A), also no noise complaint (which is an Action Level exceedance) was received by the RE, WSD, EPD and the Contractor. Hence, no Action or Limit Level exceedance was triggered during this month. The graphical plot is shown in Appendix I.

4.10 The meteorological information during reporting month extracted from Cheung Chau Station of the Hong Kong Observatory (HKO) shows in Appendix J.

5. Waste Management

5.1 Waste management was carried out by an on-site Environmental Officer or an Environmental Supervisor from time to time.

Records of Waste Quantities

All types of waste arising from the construction work are classified into the following:

l Construction & Demolition (C&D) Material;

l Chemical Waste;

l General Refuse; and

l Excavated Soil.

5.2 The quantities of waste for disposal in this Reporting Period are summarized in Table 5-1 and 5-2 and the Monthly Summary Waste Flow Table is shown in Appendix K. Whenever possible, materials were reused on-site as far as practicable.

Table 5-1 Summary of Quantities of Inert C&D Materials

Type of Waste	Quantity	Disposal Location
C&D Materials (Inert) (‘000 m³)	0	-
Reused in this Contract (Inert) (‘000 m³)	0	-
Reused in other Projects (Inert) (‘000 m³)	0	-
Disposal as Public Fill (Inert) (‘000 m³)	0	Outlaying Island Transfer facility (Cheung Chau Station)

Table 5-2 Summary of Quantities of C&D Wastes

Type of Waste	Quantity	Disposal Location
Recycled Metal (‘000kg)	0	-
Recycled Paper / Cardboard Packing (‘000kg)	0	-
Recycled Plastic (‘000kg)	0	-
Chemical Wastes (‘000kg)	0	-
General Refuses (‘000 m³)	0.07	Outlaying Island Transfer facility (Cheung Chau Station)

5.3 The estimated volume of surface runoff should be less than 50m³ in this month period.

6. Site Inspection

6.1 According to the Environmental Monitoring and Audit Manual, the environmental site inspection should been formulation by ET Leader. Regular environmental site inspections had been carried out by the ET to confirm the environmental performance. 3 weekly site inspections were carried out on 7, 10 and 18 July 2017 with the Representatives of the Engineer and the Contractor to evaluate the site environmental performance in this Reporting Month. Furthermore, joint site inspection with IEC also undertaken on 7 July 2017. No non-compliance was noted. However, minor deficiencies were observed during weekly site inspection or joint site inspection.

6.2 Observations for the site inspections and monthly audit within this Reporting Month are summarized in Table 6-1.

Table 6-1 Site Observations

Date	Findings / Deficiencies	Follow-Up Status
7 July 2017	No environmental issue was observed during the site inspection.	NA
10 July 2017	No environmental issue was observed during the site inspection.	NA
18 July 2017	No environmental issue was observed during the site inspection.	NA

7. Environmental Complaint and Non-Compliance

Environmental Complaint, Summons and Prosecution

7.1 No environmental complaint, summons and prosecution was received in this reporting period. The statistical summary table of environmental complaint is presented in Tables 7-1, 7-2 and 7-3.

Table 7-1 Statistical Summary of Environmental Complaints

Reporting Period	Environmental Complaint Statistics
Reporting Period	Frequency	Cumulative	Complaint Nature
28 Mar 14 – 30 June 17	0	0	NA
1 – 23 July 17	0	0	NA

Table 7-2 Statistical Summary of Environmental Summons

Reporting Period	Environmental Summons Statistics
Reporting Period	Frequency	Cumulative	Complaint Nature
28 Mar 14 – 30 June 17	0	0	NA
1 – 23 July 17	0	0	NA

Table 7-3 Statistical Summary of Environmental Prosecution

Reporting Period	Environmental Prosecution Statistics
Reporting Period	Frequency	Cumulative	Complaint Nature
28 Mar 14 – 30 June 17	0	0	NA
1 – 23 July 17	0	0	NA

8. Implementation Status of Mitigation Measures

General Requirements

8.1 The environmental mitigation measures that recommended in the Implementation Schedule for Environmental Mitigation Measures (ISEMM) in the approved EM&A Manual covered the issues of dust, noise, water and waste and they are showed Appendix L.

8.2 CRCPJV had been implementing the required environmental mitigation measures according to the Environmental Monitoring and Audit Manual subject to the site condition. Environmental mitigation measures generally implemented by CRCPJV in this Reporting Month are summarized in Table 8-1.

Table 8-1 Environmental Mitigation Measures

Issues	Environmental Mitigation Measures
Water Quality	· Wastewater were appropriately treated by treatment facilities; · Drainage channels were provided to convey run-off into the treatment facilities; and · Drainage systems were regularly and adequately maintained.
Air Quality	· Regular watering to reduce dust emissions from all exposed site surface, particularly during dry weather; · Frequent watering for particularly dusty construction areas and areas close to air sensitive receivers; · Cover all excavated or stockpile of dusty material by impervious sheeting or sprayed with water to maintain the entire surface wet; · Public roads around the site entrance/exit had been kept clean and free from dust; and · Tarpaulin covering of any dusty materials on a vehicle leaving the site.
Noise	· Good site practices to limit noise emissions at the sources; · Use of quite plant and working methods; · Use of site hoarding or other mass materials as noise barrier to screen noise at ground level of NSRs; · Use of shrouds/temporary noise barriers to screen noise from relatively static PMEs; · Scheduling of construction works outside school examination period in critical area; and · Alternative use of plant items within one worksite, where practicable.
Waste and Chemical Management	· Excavated material should be reused on site as far as possible to minimize off-site disposal. Scrap metals or abandoned equipment should be recycled if possible; · Waste arising should be kept to a minimum and be handled, transported and disposed of in a suitable manner; · The Contractor should adopt a trip ticket system for the disposal of C&D materials to any designed public filling facility and/or landfill; and · Chemical waste shall be handled in accordance with the Code of Practice on the Packaging, Handling and Storage of Chemical Wastes.
General	Ÿ The site was generally kept tidy and clean.

9. Conclusions

Conclusions

9.1 This is last (40^th) monthly EM&A report presenting the monitoring results and inspection findings for the Reporting Period from 1^st July 2017 to 31^st July 2017.

9.2 No noise complaint (which is an Action Level exceedance) was received and no construction noise measurement results that exceeded the Limit Level were recorded in the Reporting Period. No NOEs or the associated corrective actions were therefore issued.

9.3 In this Reporting Month, no Action Limit Level exceedances recorded in water quality recorded.

9.4 Since cleaning and sterilization of watermain was carried out and finished in January 2017, no de-chlorinated water was discharged in this reporting period and no in-situ Total residual chlorine measurement was conducted.

9.5 No documented complaint, notification of summons or successful prosecution was received by the Project.

9.6 The ET had carried out site inspection on 7, 10 and 18 July 2017 with the Representatives of the Engineer and the Contractor. Furthermore, joint site inspection with IEC also undertaken on 7 July 2017.

9.7 As agreed by the RE, IEC, Contractor and ET, the construction phase EM&A programme was terminated on 23 July 2017 and the 4-week post project marine water quality monitoring was immediately commenced on 24 July 2017 as required in Section 2.7.3 of the EM&A Manual. The result of 4-week post project marine water quality monitoring will be provided separately and is not included in this EM&A report.




			AUES Project No.: TCS/00684/13

			WSD Contract No. 1/WSD/13 - Improvement of Fresh Water Supply to Cheung Chau

			Monthly Environmental Monitoring and Audit (EM&A) Report (No.40) – July 2017
			Prepared For China Road- China Pipeline Joint Venture

Quality Index
Date	Reference No.	Prepared By	Approved By
11 August 2017	TCS00684/13/600/emar201707
11 August 2017	TCS00684/13/600/emar201707	Martin Li Assistant Environmental Consultant	T.W. Tam Environmental Team Leader

Version	Date	Description
1	9 August 2017	First Submission
2	11 August 2017	Amended against IEC’s comments

Environmental Issues	Monitoring Parameters	Action Level	Limit Level	Event & Action
Environmental Issues	Monitoring Parameters	Action Level	Limit Level	NOE Issued	Investigation	Corrective Actions
Construction Noise	L_eq_(30min)Daytime	0	0	0	--	--
Water Quality	DO	0	0	0	--	--
	Turbidity	0	0	0	--	--
	SS	0	0	0	--	--