TABLE OF CONTENTS

 

1.            INTRODUCTION  5

2.            BASIC PROJECT INFORMATION  7

3.            ROUTINE IMPACT WATER QUALITY MONITORING   11

4.            24-HR WATER QUALITY MONITORING   19

5.            ENVIRONMENTAL SITE INSPECTION AND AUDIT  23

6.            EXCEEDANCE OF THE ENVIRONMENTAL PARAMETERS  24

7.            NON-COMPLIANCE, COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTION  25

8.            CONCLUSIONS  26


TABLES:

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

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

Table III         Summary of the Exceedances Recorded in Reporting Month íV 24-hr Monitoring                        

Table 2.1      Key Personnel Contact of the Contract 7

Table 2.2      Detailed Dredging Quantity  8

Table 2.3      Status of Environmental Licenses, Notification and Permits  9

Table 3.1      Laboratory Measurement/Analysis Methods and Reporting Limits  11

Table 3.2      Water Quality Monitoring and Sampling Equipment 12

Table 3.3      Monitoring Parameters and Frequency  13

Table 3.4    Water Quality Monitoring Parameters  14

Table 3.5      Locations of Water Quality Monitoring Stations  15

Table 3.6      Summary of Water Quality Exceedance (In-situ Measurement) 16

Table 3.7      Summary of Water Quality Exceedance (Laboratory Analysis) 16

Table 4.1      24 Hours Water Quality Monitoring Equipment 19

Table 4.2      24-hr Water Quality Monitoring Parameters  20

Table 4.3      Location of Water Quality Monitoring Station  20

Table 4.4      Summary of Water Quality Exceedance (24-hr Monitoring) 21

Table 5.1     Compliance with EP Conditions in the Reporting Month  22

Table 5.2      Waste Quantities of Dredging Works  23

Table 7.1      Environmental Complaints Log   25

Table 7.2      Cumulative Statistics on Complaints  25

Table 7.3      Cumulative Statistics on Successful Prosecutions  25

 

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 íV Routine Impact Monitoring

Appendix G

Water Quality Monitoring Results and Graphical Presentation íV 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 Occurrence for the Reporting Month

 

 

 

 


EXECUTIVE SUMMARY

 

i.      This is the Thirty Sixth Monthly Environmental Monitoring Audit (EM&A) Monthly Report íV April 2017 for Contract No. CV/2013/04 íV Dredging Works in Kwai Tsing and its Approach Channel (Agreement No. CE63/2008 íV 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 March 2017 to 22 April 2017.

 

ii.    Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

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

íP         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

Referring to the Proposal for Temporary Suspension of Impact Water Quality Monitoring (0394_13_ED_0326F) which was submitted to EPD in August 2016 with no objection was received from EPD; removal of routine water quality monitoring stations at SR1 was effective from 24 December 2016.

Referring to the Proposal on Removal of Some Water Quality Monitoring Stations After Resumption of Marine Construction Works (Dredging Works and Marine Works of the Northern Part of Kwai Tsing Container Basin Only) (0394_13_ED_0332I) which has been submitted to EPD and relevant parties in December 2016 with no objection, removal of routine water quality monitoring stations at SR6, SR7, SR8, SR9, SR10 and SR11 and 24 hour monitoring stations at SR9, SR10 and SR11 was effective from 23 January 2017. The setups of 24 hour monitoring stations at SR9, SR10 and SR11 were removed on 7 February 2017.  Due to removal of some sensitive receivers in routine water quality monitoring, gradient stations G3, G5 and G6 were also be removed and gradient stations G1 and G4 replaced the previous control stations C1, C2 and C3 as C1A and C2A with reference to the approved proposal (0394_13_ED_0332I) which was effective from 23 January 2017.

 

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) 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.

 

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.

 

iv.   Waste Management

There was marine sediment Type 2 sediment (Confined Marine Disposal) disposed to East of Sha Chau Contaminated Mud Pit and a small amount of general refuse and chemical waste 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 5 site inspections in the reporting period. No particular observation was recorded in the reporting month.

 

vii.  Compliance with Specific EP conditions

Implementation of contractoríŽs 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:

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

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

 

Future Key Issues include:

íP                     Regular inspection on silt curtain deployment

íP                     Regular inspection on silt screen deployment

íP                     Implementation of EM&A Programme

íP                     Maintain dredging below allowable dredging rate in EP.

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

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

íP                     Conditions in dumping permit shall be followed strictly.