TABLE OF CONTENTS

 

1.         INTRODUCTION   Error! Bookmark not defined.

2.         BASIC PROJECT INFORMATION   Error! Bookmark not defined.

3.         ROUTINE IMPACT WATER QUALITY MONITORING   Error! Bookmark not defined.

4.         24-HR WATER QUALITY MONITORING   Error! Bookmark not defined.

5.         ENVIRONMENTAL SITE INSPECTION AND AUDIT   Error! Bookmark not defined.

6.         EXCEEDANCE OF THE ENVIRONMENTAL PARAMETERS   Error! Bookmark not defined.

7.         COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTION   Error! Bookmark not defined.

8.         CONCLUSIONS   Error! Bookmark not defined.


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 Error! Bookmark not defined.

Table 2.2       Detailed Dredging Quantity  Error! Bookmark not defined.

Table 2.3       Status of Environmental Licences, Notification and Permits  Error! Bookmark not defined.

Table 3.1       Laboratory Measurement/Analysis Methods and Reporting Limits  Error! Bookmark not defined.

Table 3.2       Water Quality Monitoring and Sampling Equipment Error! Bookmark not defined.

Table 3.3       Monitoring Parameters and Frequency  Error! Bookmark not defined.

Table 3.4       Water Quality Monitoring Parameters  Error! Bookmark not defined.

Table 3.5       Locations of Water Quality Monitoring Stations  Error! Bookmark not defined.

Table 3.6       Summary of Water Quality Exceedance (In-situ Measurement) Error! Bookmark not defined.

Table 3.7       Summary of Water Quality Exceedance (Laboratory Analysis) Error! Bookmark not defined.

Table 4.1       24 Hours Water Quality Monitoring Equipment Error! Bookmark not defined.

Table 4.2       24-hr Water Quality Monitoring Parameters  Error! Bookmark not defined.

Table 4.3       Location of Water Quality Monitoring Station  Error! Bookmark not defined.

Table 4.4       Summary of Water Quality Exceedance (24-hr Monitoring) Error! Bookmark not defined.

Table 5.1      Compliance with EP Conditions in the Reporting Month  Error! Bookmark not defined.

Table 5.2       Waste Quantities of Dredging Works  Error! Bookmark not defined.

Table 7.1       Environmental Complaints Log  Error! Bookmark not defined.

Table 7.2       Cumulative Statistics on Complaints  Error! Bookmark not defined.

Table 7.3       Cumulative Statistics on Successful Prosecutions  Error! Bookmark not defined.

 

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 and Red Tide Occurrences for the Reporting Month

 

 


EXECUTIVE SUMMARY

 

i.        This is the Fifth Monthly Environmental Monitoring Audit (EM&A) Monthly Report – September 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 August 2014 to 22 September 2014.

 

ii.      Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

·     Dredging at Portion D / Zone 13A in EP

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

·     Dredging at Portion B / Zone 6B and Zone 6D 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 and TIN (in-situ & lab) 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

1

1

1

1

1

1

0

0

0

0

-

-

3

3

Limit

8

7

9

9

0

0

0

0

0

0

-

-

17

16

SR3

Action

0

1

1

0

1

0

0

0

0

0

-

-

2

1

Limit

9

9

9

10

0

1

0

0

0

0

-

-

18

20

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

1

0

0

0

1

2

-

-

-

-

0

0

2

2

Limit

7

8

10

10

1

1

-

-

-

-

12

12

30

31

SR6

Action

0

0

0

0

6

5

0

0

0

0

-

-

6

5

Limit

10

10

12

12

1

1

0

0

0

0

-

-

23

23

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

0

0

3

3

0

0

0

0

-

-

3

3

Limit

7

7

11

12

0

0

0

0

0

0

-

-

18

19

SR9

Action

2

0

0

0

3

5

-

-

-

-

2

1

7

6

Limit

5

5

12

12

3

0

-

-

-

-

8

9

28

26

SR10

Action

2

0

0

1

4

3

-

-

-

-

2

2

8

6

Limit

6

7

9

9

0

0

-

-

-

-

9

9

24

25

SR11

Action

0

0

0

1

1

1

-

-

-

-

2

5

3

7

Limit

7

7

12

11

0

0

-

-

-

-

6

5

25

23

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

1

0

0

0

-

-

-

-

-

-

1

0

Limit

11

10

11

11

0

0

-

-

-

-

-

-

22

21

Total

Action

6

2

3

3

24

23

0

0

0

0

6

8

75

Limit

78

78

106

106

5

3

0

0

0

0

35

35

446

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

2

0

0

0

0

0

0

0

0

0

0

-

-

2

2

SR2

Action

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

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

2

0

0

0

0

0

0

0

0

0

0

-

-

0

2

SR5

Action

1

1

-

-

-

-

0

0

0

0

-

-

0

0

1

1

Limit

0

0

-

-

-

-

0

0

0

0

-

-

12

12

12

12

SR6

Action

2

1

-

-

-

-

0

0

0

0

-

-

-

-

2

1

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

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

Limit

0

0

-

-

-

-

0

0

0

0

-

-

-

-

0

0

SR9

Action

0

1

-

-

-

-

0

0

0

0

-

-

2

1

2

2

Limit

0

0

-

-

-

-

0

0

0

0

-

-

1

1

1

1

SR10

Action

0

0

-

-

-

-

0

0

0

0

-

-

3

3

3

3

Limit

0

0

-

-

-

-

0

0

0

0

-

-

0

0

0

0

SR11

Action

0

0

-

-

-

-

0

0

0

0

-

-

1

1

1

1

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

3

3

0

0

0

0

0

0

0

0

0

0

6

5

17

Limit

2

6

0

0

0

0

0

0

0

0

0

0

13

13

34

 

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

11

0

0

11

SR5

Action

57

34

-

91

Limit

13

982

-

995

SR9

Action

183

24

-

207

Limit

58

200

-

258

SR10

Action

160

28

-

188

Limit

34

944

-

978

SR11

Action

126

18

-

144

Limit

173

813

-

986

SR12

Action

0

0

0

0

Limit

28

0

0

28

SR13

Action

1

9

-

10

Limit

6

1387

-

1393

Total

Action

527

113

0

640

Limit

323

4326

0

4649

 

iii.    Waste Management

There was marine sediment (Type 1 – Open Sea 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.    Complaints, Notifications of Summons and Successful Prosecutions

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

 

v.      Site Inspections and Audit

The Environmental Team conducted 4 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 reduce noise emission from noise emitting parts by enclosing any mechanical equipment. Good housekeeping should be maintained in site area, including using drip tray for storage the mechanical fuel and keeping the drainage area clean. 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. A training session was provided on 11th September for site staffs on maintaining good dredging practice.

 

 


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.

 

vii.  Construction Activities for the Coming Reporting Period

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

·         Dredging at Portion D / Zone 13A in EP

·         Dredging at Portion A / Zone 3B and Zone 4A 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.