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 Licences, 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 Equipment Failures in 24-hr Water Monitoring Station 

Table 4.5       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           Dredging Work Location during the Reporting Period

Figure 3           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 Seventh Monthly Environmental Monitoring Audit (EM&A) Monthly Report – November 2014 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 October 2014 to 22 November 2014.

 

ii.      Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

  • Dredging at Portion A / Zone 1B, Zone 2C1, Zone 2C2, Zone 2C4, Zone 3A, Zone 3B, Zone 4A and Zone 4B in EP

·         Dredging at Portion B / Zone 5A, Zone 5B, Zone 5C, Zone 6B, Zone 6C and Zone 6D in EP

·         Dredging at Portion E / Zone 13B in EP

 

iii.    Water Quality Monitoring

Routine impact water quality monitoring at 22 designated monitoring stations namely C1, C2, C3, G1, G2, G3, G4, G5, G6, SR1, SR2, SR3, SR4, SR5, SR6, SR7, SR8, SR9, SR10, SR11, SR12, SR13 were conducted during the reporting period. Exceedances of DO, Turbidity, Total Suspended Solids, TIN (in-situ & lab) 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

SR1

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

SR2

Action

0

0

0

1

0

0

0

0

0

0

-

-

0

1

Limit

0

0

0

0

0

1

0

0

0

0

-

-

0

1

SR3

Action

0

0

0

0

0

1

0

0

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

1

1

2

-

-

-

-

0

0

1

3

Limit

0

0

0

0

1

0

-

-

-

-

10

9

11

9

SR6

Action

3

3

1

2

6

5

0

0

0

0

-

-

10

10

Limit

4

3

6

6

1

1

0

0

0

0

-

-

11

10

SR7

Action

0

0

0

0

4

3

0

0

0

0

-

-

4

3

Limit

8

8

11

10

0

0

0

0

0

0

-

-

19

18

SR8

Action

0

0

2

0

4

4

0

0

0

0

-

-

6

4

Limit

3

2

4

4

2

2

0

0

0

0

-

-

9

8

SR9

Action

2

1

0

0

5

4

-

-

-

-

2

1

9

6

Limit

5

2

7

5

5

5

-

-

-

-

8

9

25

21

SR10

Action

0

3

1

1

4

5

-

-

-

-

3

1

8

10

Limit

4

0

5

3

2

1

-

-

-

-

3

4

14

8

SR11

Action

0

2

1

0

5

4

-

-

-

-

3

4

9

10

Limit

6

1

6

5

0

1

-

-

-

-

3

3

15

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

3

1

2

2

0

0

-

-

-

-

-

-

5

3

Limit

0

2

3

3

0

0

-

-

-

-

-

-

3

5

Total

Action

8

10

7

7

29

28

0

0

0

0

8

6

103

Limit

30

18

42

36

11

11

0

0

0

0

24

25

197

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

SR1

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

2

3

0

0

0

0

0

0

0

0

0

0

-

-

2

3

SR2

Action

0

1

-

-

-

-

0

0

0

0

-

-

-

-

0

1

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR3

Action

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

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

0

0

0

0

1

0

0

0

0

0

0

0

-

-

1

0

SR5

Action

0

0

-

-

-

-

0

0

0

0

-

-

1

3

1

3

Limit

0

0

-

-

-

-

0

0

0

0

-

-

2

1

2

1

SR6

Action

2

3

-

-

-

-

0

0

0

0

-

-

-

-

2

3

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR7

Action

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR8

Action

1

1

-

-

-

-

0

0

0

0

-

-

-

-

1

1

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR9

Action

4

4

-

-

-

-

0

0

0

0

-

-

3

2

7

6

Limit

0

0

-

-

-

-

0

0

0

0

-

-

1

2

1

2

SR10

Action

0

1

-

-

-

-

0

0

0

0

-

-

1

1

1

2

Limit

0

0

-

-

-

-

0

0

0

0

-

-

0

0

0

0

SR11

Action

0

0

-

-

-

-

0

0

0

0

-

-

0

0

0

0

Limit

0

0

-

-

-

-

0

0

0

0

-

-

0

0

0

0

SR12

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

0

2

0

0

0

0

0

0

0

0

0

0

-

-

0

2

SR13

Action

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

Total

Action

7

10

0

0

0

0

0

0

0

0

0

0

5

6

28

Limit

2

5

0

0

1

0

0

0

0

0

0

0

3

3

14

 

Among the 22 monitoring stations, supplementary 24-hr water quality monitoring was also conducted at 7 of the stations, which are SR4, SR5, SR9, SR10, SR11, SR12 and SR13. Exceedances of DO and Turbidity were recorded at various monitoring stations, detail of exceedance are summarized in Table III. However, investigation indicated these exceedances were not related to the Project works.

 

 

 

 


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

57

14

-

71

Limit

15

13

-

28

SR9

Action

390

139

-

529

Limit

514

143

-

657

SR10

Action

6

110

-

116

Limit

0

288

-

288

SR11

Action

18

61

-

79

Limit

0

636

-

636

SR12

Action

0

0

0

0

Limit

10

0

0

10

SR13

Action

2

21

-

23

Limit

3

794

-

797

Total

Action

473

345

0

818

Limit

542

1874

0

2416

 

iii.    Waste Management

There was marine sediment (Type 1 – Open Sea Disposal and Type 2 – Confined Marine Disposal) disposed to East Sha Chau Pit IVc or Va and South of Brothers CMP1 or CMP2. No inert or non-inert C&D material related to dredging works and a small amount of general refuse were disposed off site in the reporting month.

 

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

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

 

Leakage incident was reported on 14 October 2014. A comprehensive incident report is under review and will be submitted to EPD separately.

 

v.      Site Inspections and Audit

The Environmental Team conducted 5 site inspections in the reporting period. No particular observation related to the dredging work was found in the reporting month. The Contractor is reminded to store the mechanical fuel properly in good containers with appropriate labels. The Contractor is also reminded to maintain good dredging work practice, including steady transfer of grab bucket, extension of retention time above silt curtain cage, lowering of grab bucket into the hopper barge and close the grab bucket while back transferring to the silt curtain cage.  Contractor is reminded to keep maintenance on the silt curtain and to clean up the dredged material at the edge of the silt curtain. Observations involving house-keeping, including to weed the drainage area regularly, to prevent dripping from the water tap and to handle the oil strain on the floor properly,  were also mentioned in the site inspections.

 

vi.    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.

 

vii.  Construction Activities for the Coming Reporting Period

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

  • Dredging at Portion A / Zone 1A, Zone 1B, Zone 2C1, Zone 2C2, Zone 2C3, Zone 2C4, Zone 3A, Zone 3B, Zone 4A and Zone 4B in EP

·         Dredging at Portion B / Zone 5A, Zone 5B, Zone 5C, Zone 6B, Zone 6C and Zone 6D in EP

  • Dredging at Portion C / Zone 9 in EP

·         Dredging at Portion D / Zone 13A in EP

·         Dredging at Portion E / Zone 13B 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.

·         Field trial dredging and monitoring at Zone 2C subzones