TABLE OF CONTENTS

 

EXECUTIVE SUMMARY                                                                                                                         

1.           INTRODUCTION   5

2.           BASIC PROJECT INFORMATION   7

3.           EM&A REQUIREMENTS – ROUTINE IMPACT MONITORING   11

4.           EM&A REQUIREMENTS – 24-HR WATER QUALITY MONITORING   16

5.           ENVIRONMENTAL SITE INSPECTION AND AUDIT   19

6.           COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTION   26

7.           CONCLUSIONS   27


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 7

Table 2‑2     Detail Dredging Quantity  8

Table 3‑1     Monitoring Parameters and Frequency  11

Table 3‑2     Water Quality Monitoring Parameters  12

Table 3‑3     Summary of Water Quality Exceedance (In-situ Measurement) 13

Table 3‑4     Summary of Water Quality Exceedance (Laboratory Analysis) 14

Table 4‑1     24-hr Water Quality Monitoring Parameters  16

Table 4‑2     Summary of Equipment Failures in 24-hr Water Monitoring Station  17

Table 4‑3     Summary of Water Quality Exceedance (24-hr Monitoring) 17

Table 5‑1     Waste Quantities of Dredging Works  20

Table 5‑2     Comparison of Quarterly Mean to Baseline Mean  22

Table 5‑3     Summary of Statistical Analysis  25

Table 6‑1     Environmental Complaints Log  26

Table 6‑2     Cumulative Statistics on Complaints  26

Table 6‑3     Cumulative Statistics on Successful Prosecutions  26

 

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

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 Third Quarterly Environmental Monitoring Audit (EM&A) Report – November 2014 - January 2015 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 October 2014 to 22 January 2015.

 

ii.      Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

 

November 2014

December 2014

January 2015

· 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

 

· 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 in EP

· Dredging at Portion C / Zone 9 and Zone 10 in EP

 

· Dredging at Portion A / Zone 1A, Zone 1B, Zone 3A, Zone 3B, Zone 4A and Zone 4B in EP

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

· Dredging at Portion C / Zone 9 and Zone 10 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 and SR13 were conducted during the reporting period. Exceedances of DO, Turbidity, Suspended Solids, NH3-N (lab), UIA (lab) and 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

1

1

0

0

0

0

-

-

1

1

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

-

-

-

-

12

9

13

9

SR6

Action

3

3

1

2

6

7

-

-

-

-

-

-

10

12

Limit

4

3

6

6

2

2

-

-

-

-

-

-

12

11

SR7

Action

0

0

0

0

4

3

-

-

-

-

-

-

4

3

Limit

8

8

11

10

0

0

-

-

-

-

-

-

19

18

SR8

Action

0

0

2

0

5

8

-

-

-

-

-

-

7

8

Limit

3

2

4

4

2

2

-

-

-

-

-

-

9

8

SR9

Action

3

1

0

0

8

7

-

-

-

-

6

2

17

10

Limit

5

3

8

6

8

8

-

-

-

-

9

11

30

28

SR10

Action

0

3

1

1

4

6

-

-

-

-

7

3

12

13

Limit

4

0

5

3

2

1

-

-

-

-

3

5

14

9

SR11

Action

0

3

1

0

7

6

-

-

-

-

6

7

14

16

Limit

6

1

6

5

0

1

-

-

-

-

3

4

15

11

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

9

11

7

7

35

40

0

0

0

0

19

12

140

Limit

30

19

43

37

16

16

0

0

0

0

27

29

217

 

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

4

3

0

0

0

0

0

0

0

0

0

0

-

-

4

3

SR2

Action

0

1

-

-

-

-

0

0

0

0

-

-

-

-

0

1

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR3

Action

0

0

-

-

-

-

3

0

0

0

-

-

-

-

3

0

Limit

0

0

-

-

-

-

1

0

1

0

-

-

-

-

2

0

SR4

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

1

1

0

0

1

0

0

0

0

0

0

0

-

-

2

1

SR5

Action

0

0

-

-

-

-

-

-

-

-

-

-

2

3

2

3

Limit

0

0

-

-

-

-

-

-

-

-

-

-

2

1

2

1

SR6

Action

5

4

-

-

-

-

-

-

-

-

-

-

-

-

5

4

Limit

0

0

-

-

-

-

-

-

-

-

-

-

-

-

0

0

SR7

Action

0

0

-

-

-

-

-

-

-

-

-

-

-

-

0

0

Limit

0

0

-

-

-

-

-

-

-

-

-

-

-

-

0

0

SR8

Action

1

1

-

-

-

-

-

-

-

-

-

-

-

-

1

1

Limit

0

0

-

-

-

-

-

-

-

-

-

-

-

-

0

0

SR9

Action

4

4

-

-

-

-

-

-

-

-

-

-

6

4

10

8

Limit

0

0

-

-

-

-

-

-

-

-

-

-

1

2

1

2

SR10

Action

0

1

-

-

-

-

-

-

-

-

-

-

3

1

3

2

Limit

0

0

-

-

-

-

-

-

-

-

-

-

0

0

0

0

SR11

Action

0

0

-

-

-

-

-

-

-

-

-

-

1

0

1

0

Limit

0

0

-

-

-

-

-

-

-

-

-

-

0

0

0

0

SR12

Action

0

0

0

0

0

0

0

0

0

0

0

0

-

-

0

0

Limit

1

3

0

0

0

0

0

0

0

0

0

0

-

-

1

3

SR13

Action

0

0

-

-

-

-

-

-

-

-

-

-

-

-

0

0

Limit

0

0

-

-

-

-

-

-

-

-

-

-

-

-

0

0

Total

Action

10

11

0

0

0

0

3

0

0

0

0

0

12

8

44

Limit

6

7

0

0

1

0

1

0

1

0

0

0

3

3

22

 

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 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

57

14

-

71

Limit

15

16

-

31

SR9

Action

764

375

-

1139

Limit

682

227

-

909

SR10

Action

69

119

-

188

Limit

27

288

-

315

SR11

Action

460

343

-

803

Limit

177

905

-

1082

SR12

Action

0

0

0

0

Limit

10

0

0

10

SR13

Action

3

28

-

31

Limit

3

804

-

807

Total

Action

1353

879

0

2232

Limit

914

2240

0

3154

 

iii.    Waste Management

iv.    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 period.

 

v.      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 has been submitted to EPD separately on 3 Dec 2014.

 

A non-compliance case was recorded by EPD during the site inspection at Grid No. C155 in Portion C on 8 December 2014 regarding the failure to comply with Environmental Permit Condition No. 3.1 (c). According to the letter submitted to EPD by the Contractor (Ref: CV201304/H4a/132/KO/pl), the Contractor had taken immediate actions to avoid recurrence of the noncompliance, the actions included providing tool box talks to all staffs and workers engaged in the dredging works for proper implementation of the preventive measures on 12 Dec and 16 Dec 2014, and that implementation will be closely monitored by the Marine Works Supervisors from Contractor.

 

vi.    Site Inspections and Audit

The Environmental Team conducted 14 site inspections in the reporting period. The Contractor is reminded to store the mechanical fuel properly in good containers with appropriate labels and also 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.

 

The Contractor is reminded to use well maintained mechanical equipment to reduce black smoke emission from the chimney of vessels.

 

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 include:

·         Dredging at Portion A / Zone 1A, Zone 1B, Zone 3A, Zone 3B, Zone 4A and Zone 4B in EP

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

·         Dredging at Portion C / Zone 9 and Zone 10 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.