EXECUTIVE SUMMARY

  i.     This Monthly Environmental Monitoring and Audit (EM&A) Report is prepared for Contract No. SPW 07/2020 “Environmental Team for Construction of Yuen Long Effluent Polishing Plant Stage 1”. Drainage Services Department (DSD) has appointed Fugro Technical Services Limited (FTS) to undertake the Environmental Team services for the project and implement the EM&A works.

ii.     This is the 4th Monthly EM&A Report for the Contract which summaries findings of the EM&A programme during the reporting period from 1 July 2021 to 31 July 2021. As informed by the Contractor, major activities in the reporting month were:

·          Pre-drill work at Primary Sedimentation Tanks (PST) by 3 drill rigs;

·          Site formation works at Primary Sedimentation Tanks (PST) no. 7 & 8;

·          Breaking of Primary Sedimentation Tanks (PST) no. 8;

·          Sheet pile installation works for Zone 2A diversion;

·          Driven H-pile at Inlet Works (IW) stage 1, 2 and Primary Sedimentation Tanks by 3 rigs;

·          Demolition of workshop and changing room by crusher and breaker;

·          Demolition of carparks

·          Trial pit for Zone 2B & 3 diversion;

·          Removal of sludge from sludge holding tanks; and

·          Overhaul work at Final Sedimentation Tanks (FST).

 

Breaches of Action and Limit Levels

iii.     No Action and Limit Level exceedance was recorded for air quality monitoring and construction noise monitoring in the reporting month.

iv.     Three Limit Level exceedance were recorded for water quality in the reporting month. The exceedance were recorded at M1 on 3, 6 and 27 July 2021. It was found that these exceedances were not project-related.

v.     No Action / Limit exceedance was recorded for noise levels at stations (NMS1 and NMS2) in close proximity to the active ardeid night roost. One active ardeid night roost site (ANR1) was observed within the Survey Area during the July 2021 monitoring period, while the other night roost site (ANR2) was not currently used by the ardeids.

vi.     One exceedance in Action Level was recorded for the ecological monitoring of birds on 09 & 13 July 2021. This was the significant decline in species diversity of species with conservation importance only. However, the exceedance was not project-related

Complaint Log

vii.     No complaints were received in the reporting period.

Notifications of any Summons and Successful Prosecutions

viii.     No notifications of summons and prosecutions were received in the reporting period.

Reporting Change

ix.     There were no reporting changes during the reporting month.

Future Key Issues

x.     The main works will be anticipated in the next three months are as follow:

·          Pre-drill work at Zone 2;

·          Demolition of Sludge Holding Tanks, Detritor 3C & Flow Meter Chamber;

·          Demolition of carpark;

·          Demolition of Final Sedimentation Tanks (FST) no. 7&8;

·          Demolition of Primary Sedimentation Tanks (PST) no. 5&6;

·          Demolition of waste storage area;

·          Sheet pile installation at Aeration Tank, Inlet Works (IW) & Primary Sedimentation Tanks (PST);

·          Driven H-pile at Inlet Works (IW) & Primary Sedimentation Tanks (PST);

·          Zone 2 & 3 diversion work;

·          Enviro. GI at Waste Storage Area & Air Floatation Thickener;

·          Removal of Sonneratia; and

·          Installation of instrumentation at Zone 2 & 3.

 

Contents

1.       INTRODUCTION   6

2.       AIR QUALITY  9

3.       NOISE  12

4.       WATER QUALITY  16

5.       ECOLOGY MONITORING   20

6.       LANDSCAPE AND VISUAL  34

7.       SITE INSPECTION AND AUDIT  35

8.       ENVIRONMENTAL COMPLAINT AND NON-COMPLIANCE  36

9.       IMPLEMENTATION STATUS OF ENVIRONMENTAL MITIGATION MEASURE  37

10.      FUTURE KEY ISSUES  38

11.      CONCLUSION AND RECOMMENDATION   39

 


Tables

Table 1.1  Contact Information of Key Personnel

Table 1.2 Environmental Licenses, Notification and Permits Summary

Table 2.1 Air Quality Monitoring Equipment

Table 2.2 Air Quality Monitoring Location

Table 2.3 Summary of Air Quality Monitoring Results

Table 2.4 Comparison of 1-hr TSP data with EIA predictions

Table 3.1 Construction Noise Monitoring Equipment

Table 3.2 Monitoring Parameters and Frequencies of Noise Monitoring

Table 3.3 Construction Noise Monitoring Location

Table 3.4 Summary of Construction Noise Monitoring Results

Table 3.5 Comparison of Noise monitoring data with EIA predictions

Table 4.1  Water Quality Monitoring and Sampling Equipment

Table 4.2  Monitoring Parameters and Frequency

Table 4.3 Coordinates of Water Quality Monitoring Locations

Table 4.4 Summary of Water Quality Exceedance

Table 5.1 Noise Monitoring Parameters (For Active Ardeid Night Roost Survey)

Table 5.2 Active Ardeid Night Roost Survey Findings

Table 5.3 Noise Monitoring Results (For Active Ardeid Night Roost Survey)

Table 5.4 Noise Monitoring Parameters

Table 5.5 Abundance of all Avifauna Species

Table 5.6 Abundance of Species of Conservation Importance

Table 5.7 Shannon Diversity Index Value of all Avifauna Species

Table 5.8 Shannon Diversity Index Value of Species with Conservation Importance

Table 5.9 Wetland habitat utilization of all avifauna species

Table 5.10 Wetland habitat utilization of conservation importance

Table 5.11 Noise Monitoring Results (For Ecological Monitoring of Birds)

Table 7.1 – Waste Generated by the Construction and Disposal Ground


Figures

Figure 1          Location of Proposed Yuen Long Effluent Polishing Plant

Figure 2          Air Quality Monitoring Locations

Figure 3          Noise Monitoring Locations

Figure 4          Water Quality Monitoring Locations

Figure 5          Ecology Monitoring Locations


Appendices

Appendix A     Construction Programme

Appendix B     Project Organization Chart

Appendix C     Action and Limit Levels

Appendix D    Calibration Certificate of Monitoring Equipment

Appendix E     Environmental Monitoring Schedule

Appendix F     Monitoring Results

Appendix G    Wind Data

Appendix H    Event and Action Plan

Appendix I      Waste Flow Table

Appendix J     Implementation Status of Environment Mitigation Measures

Appendix K     Weather and Meteorological Conditions

Appendix L     Cumulative statistics on Environmental Complaints, Notifications of Summons and Successful Prosecutions

Appendix M    Summary of Observations and Findings in the Reporting Month

Appendix N    Outstanding Issues and Deficiencies

Appendix O    Active Night Roost Monitoring Area and Vantage Points; and Noise Monitoring Stations

Appendix P     Ecological Bird Monitoring Area with Locations of Point Count Sites and Transect Route

Appendix Q    Notification of Exceedance