TABLE OF CONTENTS

 

EXECUTIVE SUMMARY                                                                                                                               

1.           INTRODUCTION  5

2.           BASIC PROJECT INFORMATION  7

3.           EM&A REQUIREMENTS íV ROUTINE IMPACT MONITORING   8

4.           EM&A REQUIREMENTS íV 24-HR WATER QUALITY MONITORING   12

5.           ENVIRONMENTAL SITE INSPECTION AND AUDIT  14

6.           NON-COMPLIANCE, COMPLAINTS, NOTIFICATION OF SUMMONS AND PROSECUTION  20

7.           CONCLUSIONS  21


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 Period íV 24-hr Monitoring                            

Table 2‑1     Key Personnel Contact of the Contract 7

Table 3‑1     Monitoring Parameters and Frequency  8

Table 3‑2     Water Quality Monitoring Parameters  9

Table 3‑3     Summary of Water Quality Exceedance (In-situ Measurement) 10

Table 3‑4     Summary of Water Quality Exceedance (Laboratory Analysis) 11

Table 4‑1     24-hr Water Quality Monitoring Parameters  12

Table 4‑2     Summary of Water Quality Exceedance (24-hr Monitoring) 13

Table 5‑1     Waste Quantities of Dredging Works  15

Table 5-2  Comparison of Quarterly Mean to Baseline MeanTable 5-2     Comparsion of Quarterly Mean to Baseline MeanTable 5-2  Comparison of Quarterly Mean to Baseline MeanTable 5-2  Comparison of Quarterly Mean to Baseline Mean 

Table 5‑3     Summary of Statistical Analysis  19

Table 61     Environmental Complaints Log                                                                                                    

Table 6‑2     Cumulative Statistics on Complaints                                                                                            

Table 6‑3     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

Graphical Presentation íV Routine Impact Monitoring Results

Appendix E

Graphical Presentation íV 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 Twelfth Quarterly Environmental Monitoring Audit (EM&A) Report íV February 2017 íV April 2017 for Contract No. CV/2013/04 íV Dredging Works in Kwai Tsing and its Approach Channel (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 January 2017 to 22 April 2017.

 

ii.    Construction Activities for the Reporting Period

During this reporting period, the principal work activities included:

 

February 2017

March 2017

April 2017

íP    Preparation works of dredging at Portion A / Zone 2B1 and 2B2 in EP.

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 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), TIN (in-situ & lab) and SS 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 13 site inspections in the reporting period. No particular observation was recorded in the reporting month except contractor was reminded to close the door of engine room to reduce the noise emission if the engine is operating.

 

According to Contractor, no archaeological deposit was found during reporting period.

 

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.