10.1 Site audits were carried out by ET on a weekly basis to monitor the timely implementation of proper environmental management practices and mitigation measures on the Contract site. Summary of the site audits are presented in Table 10.1 and Appendix P.

Table 10.1 Summary of Site Audits

Environmental Site Inspection	Works Contracts
Environmental Site Inspection	ND/2019/01	ND/2019/02	ND/2019/03	ND/2019/04	ND/2019/05	ND/2019/06	ND/2019/07
Weekly site audit with representative of the Supervisor’s Representative and the Contractor	7, 16, 21 and 28 Jan 25	8, 15, 22 and 28 Jan 25	7, 16, 21 and 28 Jan 25	2, 9, 15, 21 and 27 Jan 25	6, 16, 20 and 27 Jan 25	N/A	6, 15, 23 and 27 Jan 25
Joint Site Audit with representative of the Supervisor’s Representative, the Contractor and IEC	16 Jan 25	22 Jan 25	16 Jan 25	21 Jan 25	16 Jan 25	N/A	23 Jan 25

Remarks: The weekly site inspection for ND/2019/06 has been terminated starting from 19/10/2023 since the termination proposal was approved by EPD on the same day.

10.2 During site inspections in the reporting month, no non-conformance was identified. The observations and recommendations made during the audit sessions are summarised in Table 10.2. Any outstanding and recurrence deficiencies are presented in Table 10.3.

10.3 All construction activities with significant environmental impact undertaken by Contract No. ND/2019/06 was substantially completed in March 2022 and the majority of outstanding works were also completed in April 2022 with defect rectification works remained. The outstanding installation works were the short-duration works which would be completed within 2 months during the 1-year defect correction period, originally estimated.

10.4 Due to problems in material deliveries from Mainland China in 2022, the completion date of the outstanding works would be extended to June 2023 tentatively. However, in June 2023, more defects were found during the handover inspection so the rectification works were undertaken until July 2023 when all works were completed.

10.5 The weekly site inspection and EM&A Reporting for ND/2019/06 were maintained until the termination proposal for ND/2019/06 has been endorsed by the IEC (17 Aug 23), the Engineer (26 Aug 23) and the Project Proponent (19 Sep 23) followed by approval from EPD (19 Oct 23) in accordance. The procedure for termination proposal for ND/2019/06 is in accordance with section 15.4.2 of updated EM&A Manual.

Table 10.2 Observations and Recommendations during Site Audits

Parameters	Date	Observations and Recommendations	Follow-up
Contract No.: ND/2019/01
*Water Quality*	30/12/2024	On-site drainage at Portion 8A should be maintained properly and regularly.	Improvement/Rectification was observed during follow-up audit session on 7 January 2025.
*Water Quality*	30/12/2024	Contractor was reminded to enhance the sump pit bunding at Portion 9C.	Improvement/Rectification was observed during follow-up audit session on 7 January 2025.
Contract No.: ND/2019/02
*Water Quality***	30/12/2024	Contractors were reminded to immediately establish proper drainage system for pumped groundwater at Portion 7.	Item remarked as 250108-O01. Follow-up action is needed to be review.
	08/01/2025		Item remarked as 250115-O01. Follow-up action is needed to be review.
	15/01/2025		Item remarked as 250122-O01. Follow-up action is needed to be review.
	22/01/2025		Item remarked as 250128-O01. Follow-up action is needed to be review.
	28/01/2025		Follow-up action is needed to be reported in the following month.
	30/12/2024	Provide complete drainage system to treat wastewater. (Shek Wu Hui Treatment Plant works area)	Item remarked as 250108-R02. Follow-up action is needed to be review.
	08/01/2025		Item remarked as 250115-R02. Follow-up action is needed to be review.
	15/01/2025		Item remarked as 250122-R02. Follow-up action is needed to be review.
	22/01/2025		Item remarked as 250128-R02. Follow-up action is needed to be review.
	28/01/2025		Follow-up action is needed to be reported in the following month.
	30/12/2024	Bunding should be provided at Portion 11 to avoid surface runoff exceeds site boundary.	Item remarked as 250108-R03. Follow-up action is needed to be review.
	08/01/2025		Improvement/Rectification was observed during follow-up audit session on 15 January 2025.
	30/12/2024	Geotextile should be supplemented with the gully cover to avoid surface runoff discharge into the public drainage near Visitor Centre.	Item remarked as 250108-R05. Follow-up action is needed to be review.
	08/01/2025		Item remarked as 250115-R05. Follow-up action is needed to be review.
	15/01/2025		Item remarked as 250122-R04. Follow-up action is needed to be review.
	22/01/2025		Item remarked as 250128-R04. Follow-up action is needed to be review.
	28/01/2025		Follow-up action is needed to be reported in the following month.
*Ecology*	30/12/2024	Dull green hoarding should be erected along the site boundary as according to the submitted location plan.	Item remarked as 250108-R01. Follow-up action is needed to be review.
	08/01/2025		Item remarked as 250115-R01. Follow-up action is needed to be review.
	15/01/2025		Item remarked as 250122-R01. Follow-up action is needed to be review.
	22/01/2025		Item remarked as 250128-R01. Follow-up action is needed to be review.
	28/01/2025		Follow-up action is needed to be reported in the following month.
*Waste/Chemical Management*	30/12/2024	Accumulation of waste should be avoided at Portion 11.	Item remarked as 250108-R04. Follow-up action is needed to be review.
	08/01/2025		Item remarked as 250115-R04. Follow-up action is needed to be review.
	15/01/2025		Item remarked as 250122-R03. Follow-up action is needed to be review.
	22/01/2025		Item remarked as 250128-R03. Follow-up action is needed to be review.
	28/01/2025		Follow-up action is needed to be reported in the following month.
	15/01/2025	Drip tray should be provided for chemical/fuel containers at Shek Wu Hui Treatment Plant works area.	Improvement/Rectification was observed during follow-up audit session on 22 January 2025.
Contract No.: ND/2019/03
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Contract No.: ND/2019/04
*Air Quality*	02/01/2025	Water-spraying at Portion K should be enhanced as dust suppression measures.	Improvement/Rectification was observed during follow-up audit session on 9 January 2025.
	09/01/2025	Water-spraying should be enhanced.	Item remarked as 250115-R02. Follow-up action is needed to be review.
	15/01/2025	Water-spraying should be enhanced.	Improvement/Rectification was observed during follow-up audit session on 21 January 2025.
	21/01/2025	Dusty stockpile should be covered by impervious sheets properly.	Improvement/Rectification was observed during follow-up audit session on 27 January 2025.
	27/01/2025	Dusty stockpile under bridge A2 should be covered by impervious sheets properly.	Follow-up action is needed to be reported in the following month.
*Ecology*	09/01/2025	Silt curtain should be maintained properly.	Item remarked as 250115-R01. Follow-up action is needed to be review.
	15/01/2025		Item remarked as 250121-R01. Follow-up action is needed to be review.
	21/01/2025		Item remarked as 250127-R01. Follow-up action is needed to be review.
	27/01/2025		Follow-up action is needed to be reported in the following month.
	21/01/2025	2m high solid dull green barrier at the 10m buffer zone should be erected and maintained properly.	Improvement/Rectification was observed during follow-up audit session on 27 January 2025.
*Waste / Chemical Management*	09/01/2025	Waste accumulation should be avoided.	Improvement/Rectification was observed during follow-up audit session on 15 January 2025.
*Waste / Chemical Management*	27/01/2025	General waste should be disposed of regularly.	Follow-up action is needed to be reported in the following month.
*Water Quality*	09/01/2025	Bunding should be supplemented at A3-04 to prevent slurry runoff.	Improvement/Rectification was observed during follow-up audit session on 15 January 2025.
Contract No.: ND/2019/05
*Waste / Chemical Management*	31/12/2024	Drip tray for the chemical/fuel containers should be provided at C3-03.	Improvement/Rectification was observed during follow-up audit session on 6 January 2025.
*Air Quality*	16/01/2025	Missing NRMM label on the generator at D2-01 should be displayed properly.	Improvement/Rectification was observed during follow-up audit session on 20 January 2025.
Contract No.: ND/2019/06
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Contract No.: ND/2019/07
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Table 10.3 Summary Table for the Outstanding item(s) in the reporting month

Contract No.

Outstanding deficiencies since last reporting month

(December 2024)

Deficiencies recorded

in the reporting month

(January 2025)

Total deficiencies (including repeated deficiencies) in the reporting month

Deficiencies rectified in the reporting month

Outstanding deficiencies

need to be Follow-up in the next month

(February 2025)

Total

outstanding deficiencies

W/C

L&V

P/L

W/C

L&V

P/L

ND/2019/01

ND/2019/02

ND/2019/03

ND/2019/04

ND/2019/05

ND/2019/06*

ND/2019/07

Legends:

A = Air Quality

N = Construction Noise Impact

W = Water Quality

W/C = Waste / Chemical Management

CH = Cultural Heritage

L&V = Landscape & Visual

E = Ecology

P/L = Permit / Licences

* The weekly site inspection for ND/2019/06 has been terminated starting from 19/10/2023 since the termination proposal was approved by EPD on the same day.

Implementation Status of Environmental Mitigation Measures

10.6 According to the EIA Report, EPs and the Updated EM&A Manual, the mitigation measures detailed in the documents are recommended to be implemented during the construction phase. An updated summary of the Environmental Mitigation Implementation Schedule is provided in Appendix Q. The photographic records of measures as stipulated in EPs to mitigate environmental impacts in the reporting month are presented in Table 10.4.

Table 10.4 Photographic Records and Implementation Status of Measures

EP No.	Condition	Photographic Record	Implementation Status
EP-466/2013/A	2.9	To minimise adverse impacts on habitats of ecological importance in the vicinity of the Project, 2m high solid dull green site barrier fences shall be erected around all active works areas.	^^[^1]
EP-467/2013/A	2.9	To minimise adverse impacts on habitats of ecological importance in the vicinity of the Project, 2m high solid dull green site barrier fences shall be erected around all active works areas.	^^[^1]
EP-468/2013/A	2.11	To minimise adverse impacts on habitats of ecological importance in the vicinity of the Project, 2m high solid dull green site barrier fences shall be erected around all active works areas.	^^[^1]
EP-469/2013	2.7	To minimise adverse impacts on habitats of ecological importance in the vicinity of the Project, 2m high solid dull green site barrier fences shall be erected around all active works areas.	^^[^1]
EP-473/2013/A	2.13	To minimise adverse impacts on habitats of ecological importance in the vicinity of the Project, 2m high solid dull green site barrier fences shall be erected around all active works areas.	^^[^1]
EP-475/2013/A	2.7	To minimise adverse impacts on habitats of ecological importance in the vicinity of the Project, 2m high solid dull green site barrier fences shall be erected around all active works areas.	^^[^1]
Implementation status:		^ Mitigation measure was fully implemented * Observation/reminder was made during site audit but improved/rectified by the contractor # Observation/reminder was made during site audit but not yet improved/ rectified by the contractor X Non-compliance of mitigation measure · Non-compliance but rectified by the contractor N/A Not Applicable at this stage as no such site activities were conducted in the reporting period

Remark:

[1]: Barrier fences might be subjected to change according to the phasing plan designed at detailed design stage

Implementation Status of Water Quality Mitigation Measures

10.7 The water quality mitigation measures detailed in the EIA Report and the Updated EM&A Manual are recommended to be implemented during the construction phase. Water quality mitigation measures implemented by the contractors were closely monitored to prevent water pollution, especially during rainy season. An updated summary of the Environmental Mitigation Implementation Schedule is provided in Appendix Q. Specific water quality mitigation measures for major construction works in the reporting month are presented in Table 10.5.

Table 10.5 Specific Water Quality Mitigation Measures for Major Construction Works in the Reporting Month

Works Contracts

Photographic Records

ND/2019/01

Hard paved exposed slope surface

Provision of maintenance for the drainage and sump pit around the construction site

ND/2019/02

Hard paved exposed haul road

Hard paved exposed slope surface

ND/2019/03

Hard paved exposed haul road

Watering the main haul road regularly.

ND/2019/04

Concrete barrier along the site hoarding

Deployment of silt curtain around works area in Ng Tung River

ND/2019/05

Covering dusty stockpile at different works area

Provision of sand bags around works area and sump pit to prevent the untreated muddy water

ND/2019/07

Covering exposed slope surface with tarpaulin

De-silting waste water before discharge

Water quality mitigation measures for site(s) in operation phase, remaining defect works

ND/2019/06

Hard paved exposed haul road

Solid and Liquid Waste Management Status

10.8 Waste generated from Contract Nos. ND/2019/01, ND/2019/02, ND/2019/03, ND/2019/04, ND/2019/05 and ND/2019/07 included inert construction and demolition (C&D) materials and non-inert C&D wastes in the reporting month. The site of ND/2019/06 was handed over to AFCD for operation since 4 April 2022.

10.9 The amount of wastes generated by the construction works of the Contract Nos. ND/2019/01, ND/2019/02, ND/2019/03, ND/2019/04, ND/2019/05 and ND/2019/07 during the reporting month are shown in Appendix R. The site of ND/2019/06 was handed over to AFCD for operation since 4 April 2022.

10.10 The Contractors are advised to minimise the wastes generated through recycling or reusing. All mitigation measures stipulated in the Updated EM&A Manual and waste management plans shall be fully implemented. The status of implementation of waste management and reduction measures are summited in Appendix Q.

Ecological Mitigation Measures – Creation of Long Valley Nature Park (LVNP)

10.11 Based on the findings of the EIA Report, the area of Long Valley has been assessed as of high to very high ecological value and is the largest contiguous area of freshwater wetland habitats in Hong Kong. To safeguard the ecological value of Long Valley, about 37 hectares of land in Long Valley has been proposed to develop into Long Valley Nature Park (LVNP) for conserving and enhancing the ecologically important environment as well as for compensation of the wetland loss due to the NDA development.

10.12 LVNP is developed according to the approved Habitat Creation and Management Plan (HCMP) submitted under EP-468/2013/A. HCMP provides a framework and specifications for development and management of LVNP and guides the development to maintain and enhance the 37 hectares of low-lying wetland habitats.

10.13 Regarding the design, the zoning of land use in LVNP is intended to maintain the existing mosaic pattern of wet and dry agriculture, while controlling the activities that could potentially disturb target habitats and species. LVNP will be divided into three broad zones of land use as below:

• Biodiversity Zone of about 21 hectares largely designated for biodiversity conservation through cultivation of specified crops and habitat management.

• Agricultural Zone of about 11 hectares designated for commercially focuses crop production and eco-friendly agricultural practice for farming.

• Visitor Zone of about 5 hectares designed to accommodate visitors as well as storage and other facilities and for educational purposes.

10.14 The construction of LVNP started in late 2019 and has been opened to public starting from 9 November 2024. During the construction period, the progress of construction and wetland enhancement works has been under observation by different stakeholders including AFCD and green groups. Close communication between AFCD and CEDD were conducted to exchange views on conservation, restoration and management of habitats as well as on the planning and design of the park. In addition, advices from green groups, Hong Kong Bird Watching Society (HKBWS) and The Conservancy Association (CA), have been taken on habitat management of Long Valley and potential effects on habitat and wildlife of each individual work conducted in Long Valley. The last meeting was held on 18 November 2022 to share the progress of LVNP with different stakeholders, including CEDD, AFCD, CA, HKBWS, Contractor, ET, IEC and farmers.

10.15 Proposals on wetland creation and restoration, dry agricultural land creation, pond creation, water treatment wetland and design of irrigation channel were submitted by the Contractor to achieve the objectives stated in HCMP and accepted by the Engineer with consent from AFCD before implementation. The Contractor would consult the stakeholders for recommendations and suggestions on mitigation measures to minimise the environmental impacts arising from construction works. The progress of works would be arranged to minimise impacts to avifauna and maintain the habitat for avifauna. The photographic records of site activities in LVNP are presented in Table 10.6.