EXECUTIVE SUMMARY

Introduction

1. This is the 51^st monthly Environmental Monitoring and Audit (EM&A) Report prepared by Cinotech Consultants Limited for the project ¡§Contract No. HY/2011/09 ¡V Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road ¡V Section between HKSAR Boundary and Scenic Hill¡¨ (hereinafter called the ¡§Contract¡¨). This report documents the findings of EM&A Works conducted in April 2017.

Environmental Monitoring and Audit Progress

2. A summary of the monitoring activities in this reporting month is listed in Table I below:

Table I Summary Table for Monitoring Activities in the Reporting Month

Parameter(s)	Date(s)
1-hr TSP Monitoring	3^rd, 7^th, 13^th, 19^th, 25^th and 28^th April 2017
24-hr TSP Monitoring	3^rd, 7^th, 13^th, 19^th, 25^th and 28^th April 2017
Noise Monitoring	5^nd, 11^th, 20^th and 26^th April 2017
Water Quality Monitoring	3^rd, 6^th, 8^th, 10^th, 12^th, 14^th, 18^th, 20^th, 22^nd, 24^th, 26^th and 28^th April 2017
Dolphin Monitoring (Line-transect Vessel Surveys)	5^th and 13^th April 2017
Environmental Site Inspection	6^th, 11^th, 18^th and 25^th April 2017

Breaches of Action and Limit Levels

3. Summary of the environmental exceedances of the reporting month is tabulated in Table II.

Table II Summary Table for Events Recorded in the Reporting Month

Environmental Monitoring	Parameter	No. of Exceedance		Total No. of Exceedance	No. of Exceedance related to the Construction Activities of this Contract		Total No. of Exceedance related to the Construction Activities of this Contract
		Action Level	Limit Level		Action Level	Limit Level
Air Quality	1-hr TSP	0	0	0	0	0	0
	24-hr TSP	0	0	0	0	0	0
Noise	Leq(30min)	0	0	0	0	0	0
Water Quality	Dissolved Oxygen (DO) (Surface & Middle)	0	0	0	0	0	0
	Dissolved Oxygen (DO) (Bottom)	0	0	0	0	0	0
	Turbidity	0	0	0	0	0	0
	Suspended Solids (SS)	4	1	5	0	0	0

1-hour TSP Monitoring

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

24-hour TSP Monitoring

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

Construction Noise

6. All construction noise monitoring was conducted as scheduled in the reporting month. No Action/Limit Level exceedance was recorded.

Water Quality

7. All water quality monitoring was conducted as scheduled in the reporting month. There are four Action Level and one Limit Level exceedances were recorded for suspended solids. No Action/Limit Level exceedance for dissolved oxygen and turbidity were recorded.

8. According to the investigation, the exceedances are considered not due to the Contract due to the following reasons:

1) No pollution discharge from construction activity was observed;

2) The exceeded results were similar or within the ranges baseline monitoring results;

3) Monitoring station is situated at the upstream of the construction sites;

4) Adverse water quality outside the site boundary was observed while no construction vessel for this Contract was travelling nearby.

Complaint Log

9. No environmental complaint was received in the reporting month.

Notification of Summons and Successful Prosecutions

10. No notification of summons and successful prosecution was received in the reporting month.

Reporting Changes

11. This report has been developed in compliance with the reporting requirements for the subsequent monthly EM&A Report as required by the EM&A Manual for Hong Kong Link Road (EM&A Manual).

Future Key Issues

12. Major site activities for the coming reporting month will include:

WA4

¡P Establishment for Asphalt Plant

Ancillary and Associated Facilities

¡P Sealing of deck openings and preparation deck surface for waterproofing

¡P Waterproofing and asphalt laying

¡P Watermain installation

¡P Installation of carrier drains

¡P Installation of precast parapet skins

¡P Construction of median and side barriers

¡P Construction of longitudinal stitching

¡P Erection of sign gantry

¡P Reinstatement of slope area and drainage works

¡P Reinstatement of sloping seawall

¡P Fill slope for CLK South Road realignment

¡P Laying of asphalt pavement

¡P Sealing of gantry crane loading opening

E&M Works

¡P E&M installation

¡P E&M ducting installation

¡P E&M works inside SHT building

¡P Street light cables and poles installation

¡P Cable hanger installation

¡P Construction of Lad Centre

Marine Viaduct (P0 to P80)

Deck Erection

¡P Segment erection

External Prestressing Tendon Installation

Internal Prestressing Grouting

Turnaround Facilities

¡P Stitching works

¡P Erection of I-beam supporting towers