EXECUTIVE SUMMARY

This Monthly Environmental Monitoring and Audit (EM&A) Report is prepared for Contract No. SPW 02/2023 “Environmental Team for Construction of Yuen Long Effluent Polishing Plant Stage 1”. Drainage Services Department (DSD) has appointed Aurecon Hong Kong Limited (Aurecon) to undertake the Environmental Team services for the project and implement the EM&A works.

This is the 36^th Monthly EM&A Report for the construction phase which summaries findings of the EM&A programme during the reporting period from 1 March 2024 to 31 March 2024. As informed by the Contractor, major activities in the reporting month were:

· Demolition at SDB

· ABWF work, E&M works and fixing GRC panel at CLP Substation

· ABWF and E&M works at PST

· E&M work and RC structure at IW

· Erection temp. loading platform at AGS

· ELS work at AGS

· Erection temp. loading platform at TTS

· ELS work at TTS

· ELS work at STB

· ELS work at Sludge Digester no. 1-3

· E&M work at Biogas Holder no. 1

· Pipeworks for interim scheme

· Disposal of construction waste as indicated in Appendix I.

Breaches of Environmental Quality Performance Limits (AL levels)

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

No Action and Limit Level exceedance was recorded for water quality monitoring in the reporting month.

No Action / Limit exceedance was recorded for noise levels at stations (NMS1 and NMS2) in close proximity to the two active ardeid night roosts (ANR1 and ANR2) observed within the Survey Area during the reporting month.

One exceedance in Action Level was recorded for the ecological monitoring of birds on 4 March 2024 (daytime). This includes decline in Abundance of Species of Conservation Importance in the point count method.

No corrective actions were required according to the Event and Action Plans for the Monitoring Parameters.

Land Contamination

Regular site inspection was carried out to ensure the recommended mitigation measures are properly implemented. The signed final Contamination Assessment Report (CAR) for “Main Storeroom & Workshops”, “Mechanical Workshop”, “Waste Storage Area”, “SAS Thickener House-1” and “SAS Thickener House-2” were submitted to EPD respectively on 1st November 2021, 23rd November 2021, 29th April 2022, 6th July 2022 and 19th June 2023. No contaminated soil and ground water was found within the Main Storeroom & Workshop, Mechanical Workshop, Waste Storage Area, SAS Thickener House-1 and SAS Thickener House-2, and no remedial action is required for these locations.

Complaint Log

No complaints were received in the reporting period.

Notifications of Summons and Successful Prosecutions

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

Reporting Change

There were no reporting changes during the reporting month.

Future Key Issues

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

· Piling at SDB