EXECUTIVE SUMMARY

Introduction

1. This is the 28^th monthly Environmental Monitoring and Audit (EM&A) Report prepared by Cinotech Consultants Limited for the project “Contract No. HY/2011/09 – Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road – Section between HKSAR Boundary and Scenic Hill” (hereinafter called the “Contract”). This report documents the findings of EM&A Works conducted in May 2015.

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	6^th, 12^th, 18^th, 22^nd and 28^th May 2015
24-hr TSP Monitoring	6^th, 12^th, 18^th, 22^nd and 28^th May 2015
Noise Monitoring	7^th, 13^th, 19^th and 29^th May 2015
Water Quality Monitoring	2^nd, 4^th, 6^th, 8^th, 11^th, 13^th, 15^th, 18^th, 20^th, 22^nd, 25^th, 27^th and 29^th May 2015
Dolphin Monitoring (Line-transect Vessel Surveys)	7^th and 15^th May 2015
Additional Land-based Dolphin Behaviour and Movement Monitoring	11^th and 19^th May 2015
Environmental Site Inspection	5^th, 12^th, 18^st and 26^th May 2015
Archaeological Site Inspection	⁽¹⁾N/A

Remark: ⁽¹⁾No archaeological site inspection was conducted in the reporting month.

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		No. of Exceedance related to the Construction Activities of this Contract
Environmental Monitoring	Parameter	Action Level	Limit Level	Action Level	Limit Level
Air Quality	1-hr TSP	0	0	0	0
Air Quality	24-hr TSP	0	0	0	0
Noise	L_eq_(30min)	0	0	0	0
Water Quality	Dissolved Oxygen (DO) (Surface & Middle)	0	0	0	0
	Dissolved Oxygen (DO) (Bottom)	0	0	0	0
	Turbidity	0	0	0	0
	Suspended Solids (SS)	2	1	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 two Action Level and one Limit Level exceedances for suspended solids were recorded. No Action/Limit Level exceedance for dissolved oxygen and turbidity were recorded.

8. According to the investigation, no pollution discharge was observed from the site. In addition, dispersion of sediment plume to the monitoring stations from the area outside the site boundary (i.e. works area not under and related to HY/2011/09) was observed. Therefore, the exceedances are considered not due to the Contract.

Complaint Log

9. No environmental complaints were 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

Ÿ Fabrication of lifting frames

Ÿ Deliveries of frame structures

WA7

Ÿ Fabrication of cofferdam frame structures

Ÿ Maintenance of Reverse Circulation Drill (RCD) equipment

Marine Viaduct (P0 to P80)

Reverse Circulation Drill (RCD) Method:

Ÿ Temporary platform formation

Ÿ Installation of Jacket

Ÿ Dismantling of piling jackets

Ÿ Pile excavation and casing installation

Ÿ Inter-face tests, full depth coring test and sonic test

Ÿ Grouting works

Pile Cap Construction:

Ÿ Installation of precast cap shells

Ÿ Concreting

Ÿ Kingpost installation and associated steel welding works

Ÿ Concreting trimming

Ÿ Rock excavation

Ÿ Steel Fixing works of pile cap

Works with Cofferdam:

Ÿ Installation of waling strut

Ÿ Installation of sheet pile

Ÿ Installation of temporary working platform

Ÿ Installation of shear pin

Ÿ Installation of bored pile casing

Ÿ Excavation works and casting of concrete plug

Ÿ Dewatering works and sealing works

Ÿ Additional welding

Column Construction:

Ÿ Lifting works

Ÿ Lift concreting

Ÿ Pier head works

Ÿ Pier head concreting

Precast Column Erection

Ÿ Installation of base units and precast units

Ÿ Stressing of vertical nailing tendons

Deck Erection

Ÿ Setting up of equipment

Ÿ Segment erection

Precast Segment

Ÿ Segment casting

Land Viaduct (P81 to Abutment at Scenic Hill Tunnel (SHT))

Ÿ Pile construction

Ÿ Pouring of column

Ÿ Excavation works and waling & struts installation work

Ÿ Sewage diversion

Ÿ Pre-bored sheet pile

Ÿ Pile cap excavation work and waling & struts installation

Ÿ Erection of steel girders and cross beams

Ÿ Erection of vertical formwork and kickers

Ÿ Steel fixing for portal

Ÿ Removal of falsework

Ÿ Formworks

Ÿ Construction of temporary foundations

Ÿ Segment deliveries

Ÿ Segment erection