Cover Page
Verification Letter

TABLE OF CONTENTS

 

EXECUTIVE SUMMARY                                                                                                                               

1.           INTRODUCTION  5

2.           BASIC PROJECT INFORMATION  7

3.           EM&A REQUIREMENTS – ROUTINE IMPACT MONITORING   9

4.           EM&A REQUIREMENTS – 24-HR WATER QUALITY MONITORING   13

5.           ENVIRONMENTAL SITE INSPECTION AND AUDIT  15

6.           NON-COMPLIANCE, COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTION  22

7.           CONCLUSIONS  23

 

TABLES:

Table I        Summary of Water Quality Exceedances – Routine Impact Monitoring (In-situ)                                

Table II        Summary of Water Quality Exceedances – Routine Impact Monitoring (Laboratory Analysis)                  

Table III       Summary of the Exceedances Recorded in Reporting Period – 24-hr Monitoring                            

Table 2-1     Key Personnel Contact of the Contract        

Table 2-2     Detail Dredging Quantity     

Table 3-1     Monitoring Parameters and Frequency

Table 3-2     Water Quality Monitoring Parameters           

Table 3-3     Summary of Water Quality Exceedance (In-situ Measurement)          

Table 3-4     Summary of Water Quality Exceedance (Laboratory Analysis)          

Table 4-1     24-hr Water Quality Monitoring Parameters   

Table 4-2     Summary of Water Quality Exceedance (24-hr Monitoring)    

Table 5-1     Waste Quantities of Dredging Works           

Table 5-2     Comparison of Quarterly Mean to Baseline Mean     

Table 5-3     Summary of Statistical Analysis      

Table 6-1     Environmental Complaints Log        

Table 6-2     Cumulative Statistics on Complaints

Table 6-3     Cumulative Statistics on Successful Prosecutions   

FIGURES:

Figure 1           Project General Layout

Figure 2           Locations of Water Quality Monitoring Stations

 

APPENDICES:

Appendix A

Project Organization Chart

Appendix B

Construction Programme

Appendix C

Action and Limit Levels

Appendix D

Graphical Presentation – Routine Impact Monitoring Results

Appendix E

Graphical Presentation – 24-hr Monitoring Results

Appendix F

Environmental Mitigation Implementation Schedule

Appendix G

Waste Generation in Reporting Period

Appendix H

Quarterly Assessment of Construction Impacts

           


 

EXECUTIVE SUMMARY

 

i.      This is the Thirteenth Quarterly Environmental Monitoring Audit (EM&A) Report – May 2017 – July 2017 for Contract No. CV/2013/04 – Dredging Works in Kwai Tsing and its Approach Channel (CE63/2008 – Providing Sufficient Water Depth for Kwai Tsing Container Basin and its Approach Channel). The dredging works commenced on 23 April 2014. This report presents the environmental monitoring and audit works conducted from 23 April 2017 to 22 July 2017.

 

ii.    Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

 

May 2017

June 2017

July 2017

·      Preparation Works of Dredging at Portion A / Zone 1A, Zone 2B1, 2B2 and 2C1 in EP.

·      Dredging at Portion A / Zone 1A, Zone 2B1, 2B2 and 2C1 in EP.

·     Preparation Works of Dredging at Portion A / Zone 2B1 and 2B2 in EP.

·     Dredging at Portion A / Zone 2B1 and 2B2 in EP.

·    Preparation Works of Dredging at Portion A / Zone 1A, Zone 2B1 and 2B2 in EP.

·    Dredging at Portion A / Zone 1A, Zone 2B1 and 2B2 in EP.

Note: Hotspot area was completed excepted hard materials and buffer zone was almost completed except known highspot and hard materials

 

iii.   Water Quality Monitoring

Routine impact water quality monitoring at 9 designated monitoring stations namely C1A, C2A, G2, SR2, SR3, SR4, SR5, SR12, SR13 were conducted during the reporting period. Exceedances of NH3-N (in-situ & Lab), TIN (in-situ & lab), TSS and E.coli were recorded at various monitoring stations, detail of exceedance are summarized in Table I and II. However, investigation indicated these exceedances were not related to the Project works.

 

Table I        Summary of Water Quality Exceedances – Routine Impact Monitoring (In-situ)

Station

Exceedance Level

DO (S&M)

DO (B)

Turbidity

NH3-N

UIA

TIN

Total

 

 

E

F

E

F

E

F

E

F

E

F

E

F

E

F

SR2

Action

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

0

0

0

0

0

0

0

0

0

0

-

-

0

0

SR3

Action

0

0

0

0

0

0

0

1

0

0

-

-

0

1

Limit

0

0

0

0

0

0

0

0

0

0

-

-

0

0

SR4

Action

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

0

0

0

0

0

0

0

0

0

0

-

-

0

0

SR5

Action

0

0

0

0

0

0

-

-

-

-

1

0

1

0

Limit

0

0

0

0

0

0

-

-

-

-

36

37

36

37

SR12

Action

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

0

0

0

0

0

0

0

0

0

0

-

-

0

0

SR13

Action

0

0

0

0

0

0

-

-

-

-

-

-

0

0

Limit

0

0

0

0

0

0

-

-

-

-

-

-

0

0

Total

Action

0

0

0

0

0

0

0

1

0

0

1

0

2

Limit

0

0

0

0

0

0

0

0

0

0

36

37

73

 

 

Table II       Summary of Water Quality Exceedances – Routine Impact Monitoring (Laboratory Analysis)

Station

Exceedance Level

Suspended Solids

BOD5

E. coli

NH3-N

UIA

Synthetic Detergent

 

TIN

Total

 

 

E

F

E

F

E

F

E

F

E

F

E

F

E

F

E

F

SR2

Action

1

0

-

-

-

-

0

0

0

0

-

-

-

-

1

0

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR3

Action

1

0

-

-

-

-

0

1

0

0

-

-

-

-

1

1

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR4

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

3

1

0

0

1

2

0

0

0

0

0

0

-

-

4

3

SR5

Action

2

0

-

-

-

-

-

-

-

-

-

-

1

0

3

0

Limit

0

0

-

-

-

-

-

-

-

-

-

-

36

37

36

37

SR12

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

2

2

0

0

0

0

0

0

0

0

0

0

-

-

2

2

SR13

Action

0

0

-

-

-

-

-

-

0

0

-

-

-

-

0

0

Limit

0

0

-

-

-

-

-

-

0

0

-

-

-

-

0

0

Total

Action

4

0

0

0

0

0

0

1

0

0

0

0

1

0

6

Limit

5

3

0

0

1

2

0

0

0

0

0

0

36

37

84

 

Among the 9 monitoring stations, supplementary 24-hr water quality monitoring was also conducted at 4 of the stations, which are SR4, SR5, SR12 and SR13. No exceedance was recorded in the reporting month. Number of exceedances recorded in the reporting month at each impact station is summarized in Table III.

 

Table III      Summary of the Exceedances Recorded in Reporting Quarter – 24-hr Monitoring

Station

Exceedance Level

Turbidity

DO

NH3-N

Total

SR4

Action

0

0

0

0

Limit

0

0

0

0

SR5

Action

0

0

-

0

Limit

0

0

-

0

SR12

Action

0

0

0

0

Limit

0

0

0

0

SR13

Action

0

0

-

0

Limit

0

0

-

0

Total

Action

0

0

0

0

Limit

0

0

0

0

 

iv.   Waste Management

There was marine sediment Type 1 sediment (Open Sea Disposal) disposed to South Cheung Chau Open Sea Sediment Disposal Area and Type 2 sediment (Confined Marine Disposal) disposed to East of Sha Chau Contaminated Mud Pit and a small amount of general refuse were disposed off site in the reporting month.

 

v.    Non-Compliance, Complaints, Notifications of Summons and Successful Prosecutions

No complaint, notification of prosecutions or summons was received in the reporting period.

 

vi.   Site Inspections and Audit

The Environmental Team conducted 13 site inspections in the reporting period. No particular observation was recorded in the reporting month except stagnant water was found at drip tray of the wire at drilling barge 998.

 

According to Contractor, no archaeological deposit was found during reporting period.

 

vii.  Compliance with Specific EP conditions

Implementation of contractor’s mitigation for dredging work and the associated dredging records were checked. It was concluded that the dredging is conducted orderly in compliance with the EP requirements on site mitigation measures in general.

 

viii.Construction Activities for the Coming Reporting Period

During the coming reporting period, the principal work activities included:

·         Preparation Works of Dredging at Portion A / Zone 2B1 and 2B2 in EP