TABLE OF CONTENTS

 

1.            INTRODUCTION 

2.            BASIC PROJECT INFORMATION 

3.            ROUTINE IMPACT WATER QUALITY MONITORING  

4.            24-HR WATER QUALITY MONITORING  

5.            ENVIRONMENTAL SITE INSPECTION AND AUDIT 

6.            EXCEEDANCE OF THE ENVIRONMENTAL PARAMETERS 

7.            NON-COMPLIANCE, COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTION 

8.            CONCLUSIONS 


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 Month – 24-hr Monitoring                        

Table 2.1      Key Personnel Contact of the Contract

Table 2.2      Detailed Dredging Quantity 

Table 2.3      Status of Environmental Licenses, Notification and Permits 

Table 3.1      Laboratory Measurement/Analysis Methods and Reporting Limits 

Table 3.2      Water Quality Monitoring and Sampling Equipment

Table 3.3      Monitoring Parameters and Frequency 

Table 3.4    Water Quality Monitoring Parameters 

Table 3.5      Locations of Water Quality Monitoring Stations 

Table 3.6      Summary of Water Quality Exceedance (In-situ Measurement)

Table 3.7      Summary of Water Quality Exceedance (Laboratory Analysis)

Table 4.1      24 Hours Water Quality Monitoring Equipment

Table 4.2      24-hr Water Quality Monitoring Parameters 

Table 4.3      Location of Water Quality Monitoring Station 

Table 4.4      Summary of Water Quality Exceedance (24-hr Monitoring)

Table 5.1     Compliance with EP Conditions in the Reporting Month 

Table 5.2      Waste Quantities of Dredging Works 

Table 7.1      Environmental Complaints Log  

Table 7.2      Cumulative Statistics on Complaints 

Table 7.3      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

Copies of Calibration Certificates

Appendix E

Schedule of Water Quality Monitoring

Appendix F

Water Quality Monitoring Results and Graphical Presentation – Routine Impact Monitoring

Appendix G

Water Quality Monitoring Results and Graphical Presentation – 24-hr Monitoring

Appendix H

Event and Action Plans

Appendix I

Details of Notification of Exceedances

Appendix J

Environmental Mitigation Implementation Schedule

Appendix K

Waste Generation in Reporting Period

Appendix L

Weather Conditions for the Reporting Month

 

 


EXECUTIVE SUMMARY

 

i.      This is the Forty-second Monthly Environmental Monitoring Audit (EM&A) Monthly Report – October 2017 for Contract No. CV/2013/04 – Dredging Works in Kwai Tsing and its Approach Channel (Agreement No. 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 September 2017 to 22 October 2017.

 

ii.    Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

·         Preparation Works of Dredging at Portion A / Zone1A,  2B1, 2B2 and  2C1 in EP

·         Dredging at Portion A / Zone 1A, 2B1, 2B2. 2C1 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 DO (S&M), Turbidity, TIN (in-situ & lab) and Suspended Solid 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

1

0

0

0

0

0

-

-

1

0

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

1

1

-

-

-

-

1

1

2

2

Limit

2

2

0

0

0

0

-

-

-

-

8

8

10

10

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

2

1

0

0

0

0

1

1

5

Limit

2

2

0

0

0

0

0

0

0

0

8

8

20

 

 

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

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR3

Action

2

1

-

-

-

-

0

0

0

0

-

-

-

-

2

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

2

1

0

0

0

0

0

0

0

0

0

0

-

-

2

1

SR5

Action

0

1

-

-

-

-

-

-

-

-

-

-

1

1

1

2

Limit

0

0

-

-

-

-

-

-

-

-

-

-

8

8

8

8

SR12

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

3

2

0

0

0

0

0

0

0

0

0

0

-

-

3

2

SR13

Action

0

0

-

-

-

-

-

-

0

0

-

-

-

-

0

0

Limit

0

0

-

-

-

-

-

-

0

0

-

-

-

-

0

0

Total

Action

2

2

0

0

0

0

0

0

0

0

0

0

1

1

6

Limit

5

3

0

0

0

0

0

0

0

0

0

0

8

8

24

 

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 Month – 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 East of Sha Chau Contaminated Mud Pit 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 4 site inspections in the reporting period. No particular observation was recorded in the reporting month.

 

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 1A, 2B1, 2B2 and  2C1 in EP

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

 

Future Key Issues include:

·         Regular inspection on silt curtain deployment

·         Regular inspection on silt screen deployment

·         Implementation of EM&A Programme

·         Maintain dredging below allowable dredging rate in EP.

·         Cleaning of excess material from the decks and exposed fittings of barges and dredgers before the vessel is moved.

·         Barge loading shall be monitored to ensure material is not lost during transportation.

·         Conditions in dumping permit shall be followed strictly.

·         After the completion of the construction works, post-construction water quality monitoring shall be carried out in accordance with the EM&A Manual Section 2.1.7. Water quality monitoring locations for the post-construction are SR1, SR2, SR3, SR4, SR5, SR6, SR7, SR8, SR9, SR10, SR11, SR12, SR13, G1, G2, G3, G4, G5, G6, C1, C2 and C3.

·         The impact monitoring schedule and the commencement of the post-construction water quality monitoring programme will be subjected to change due to the completion of construction works.