EXECUTIVE SUMMARY

ES 1 An Environmental Permit (EP-085/2000/C) was granted to Highways Department by the Environmental Protection Department for the construction of Route 8 Project between Tsing Yi and Cheung Sha Wan. This EP covers four phases of the Route 8 Project namely Phase 1 – Ngong Shuen Chau Viaduct, Phase 2a – Nam Wan Tunnel and West Tsing Yi Viaduct, Phase 2b – East Tsing Yi Viaduct and Phase 3 – Stonecutters Bridge.

ES 2 This is the 46^th monthly Environmental Monitoring and Audit (EM&A) report for “Phase 1 - Route 8 Ngong Shuen Chau Viaduct Contract (HY/2000/21)”. This report presents the results of the EM&A works conducted during the period between 29^th April 2006 and 28^th May 2006 in accordance with the EM&A Manual which forms part of the EIA Report (Register No. AEIAR-018/1999).

ES 3 During the monitoring period, some of the major construction activities undertaken during normal hours are highlighted as follows:

i. excavation;

ii. traffic and utilities diversions;

iii. abutment backfilling;

iv. pier/portal construction;

v. bridge deck construction;

vi. viaduct finishing and surfacing;

vii. drainage system installation;

viii. segment delivery, erection and fixing; and

ix. deck parapet skin erection and fixing.

ES 4 During the monitoring period, the major construction activities undertaken during evening, night time and Public Holidays are highlighted as follows:

i. pier/portal construction;

ii. segment delivery, fixing and erection;

iii. bridge deck construction; and

iv. deck parapet skin erection and fixing.

ES 5 Monitoring of Total Suspended Particulates (TSP) and Noise were carried out in accordance with the EM&A Manual. Weekly site inspections were conducted by the ET on 4^th, 12^th, 16^th and 26^th May 2006 and the joint IEC monthly audit was conducted on 19^th May 2006. EPD site inspection was carried out on 16^th May 2006.

Air Quality

ES 6 A total of 54 sets of 1-hour TSP and 18 sets of 24-hour TSP measurement were taken during the reporting period at ASR1, ASR2 and ASR3 and the results of all measurements taken were below the Action/Limit (AL) Levels.

Noise

ES 7 In order to assess the construction noise impact effectively for all noise monitoring locations (NSR1 to NSR3) from this Contract, an adjustment approach was adopted since 1^st March 2005 and had been consulted with EPD to audit merely the construction noise levels against the statutory noise limits. The measured noise levels were adjusted with the corresponding baseline levels in order to facilitate the interpretation of the construction noise levels and this in turn would determine the actual construction noise impact contributed solely by the Phase 1 construction activities.

Daytime Monitoring

ES 8 A total of 12 sets of Leq(30min) measurement were taken in the daytime (i.e. 0700 to 1900 hours on normal weekdays) at all monitoring stations (NSR1, NSR2 and NSR3) during the reporting period and no exceedances were recorded.

Evening-time Monitoring

ES 9 A total of 9 sets of 6 x Leq(5min) measurements were taken in the evening-time (i.e. 1900 to 2300 hours) at all three monitoring stations during the reporting period and no exceedances were recorded.

Night-time Monitoring

ES 10 A total of 9 sets of 4 x Leq(5min) measurements were taken at night-time (i.e. 2300 to 0700 next day) at all three monitoring stations during the reporting period and no exceedances were recorded.

Public-holiday Monitoring

ES 11 A total of 9 sets of 6 x Leq(5min) measurements were taken in public holidays (i.e. 0700 to 1900 hours during public holiday) at all three monitoring stations and no exceedances were recorded.

Water Quality

ES 12 A total of 3 Effluent Discharge Licenses were granted by EPD. In accordance with the conditions of the licenses, water sampling at designated discharge points shall be carried out on a monthly basis for area P1-SA1 (Part 1) (Grid 1 to 9) and on a quarterly basis for areas P1-SA1 (Part 2) (Grid 10 to 27, Container Port Road E/B), P1-SA6, P1-SA8 and P1-SA11.

ES 13 5 water samples (3 at P1-SA1 (Part 1), 1 at P1-SA1 (Part 2) and 1 at P1-SA6) were taken on 30^th May 2006 by CHEC. The water samples were subsequently tested by a HOKLAS accredited laboratory and the results will be reported in the next EM&A monthly report. The next water sampling is scheduled in June for area P1-SA1 (Part 1).

Waste Management

ES 14 A revised Waste Management Plan (Rev. 17) was submitted to EPD for information on 11^th May 2006 with the latest information including the most up to date estimation of inert C&D materials and non-inert C&D materials

ES 15 With effect from 6^th February 2005, all inert C&D material had been disposed of at Tuen Mun Fill Bank. The trip ticket system has been implemented effectively during the reporting period.

ES 16 A total of 522 no. of trucks (approximately 3,132m³) of inert C&D materials were delivered to Tuen Mun Fill Bank during the reporting period. Approximate 116.51 tonnes of C&D waste was produced on-site and were delivered to SENT. In addition, no chemical waste was disposed off site during the reporting period.

ES 17 On 7^th December 2005, approval was granted by CEDD to import a maximum of 3,000m³ of soft material from “HY2002/26 – Stonecutters Bridge” for re-usage purposes. A total of 2,004m³ of soft material were delivered from HY2002/26 to Phase 1 Contract since December 2005.

Site Audits / Inspections

ES 18 Weekly site inspections were carried out by the ET and the major findings are presented below:

Item	Findings	Corrective and Preventive measures proposed by CHEC	Effectiveness of measures
1	CHEC was reminded to cover all open stockpiles entirely by impervious sheeting after operation and / or end of each working day.	For open stockpiling areas at P1-SA1 (Part 1) and P1-SA6 (Bus Depot), all open stockpiles had been protected by hydroseeding. The remaining open stockpiles / soil heaps on site have been covered by impervious sheeting properly after operation and / or end of each working day.	Completed and closed. (Please refer to Appendix Q, Photo 1 to 4).
2	CHEC was reminded to maintain all silt removal facilities, channels and manholes with the deposited silt and grit being removed at least once a week, and at the onset of and after each rainstorm.	All temporary drainage and runoff control systems would be maintained properly on a weekly basis, and at the onset of and after each rainstorm.	Completed and closed. (Please refer to Appendix Q, Photo 5 to 8).

ES 1 The monthly IEC audit was carried out on 19^th May 2006. No non-compliances (NC) or observations were recorded by IEC during the audit. IEC was in general satisfied from the audit the environmental mitigation works that CHEC has carried out on site.

ES 2 EPD site inspection was carried out on 16^th May 2006. EPD noted that appropriate environmental mitigation measures have been implemented by CHEC on site and the performance of such environmental measures were satisfactory. However, CHEC was reminded to further enhance the coverage and the frequency of water spraying to ensure that the dust emission from the construction site would be kept to its minimum, in particular P1-SA1. Appropriate mitigation measures have been carried out by CHEC to further improve the site situation.

ES 3 The following permits / licenses have been granted by EPD for the construction of the Phase 1 Contract and they are:-

· Environmental Permit (EP-085/2000/C)

· Chemical Waste Producer Registration (WPN – 5213-269-C3215-01)

· 3 Effluent Discharge Licences (EP482/269/0038/I; EP482/269/0039/I & EP482/269/0040/I)

· 6 Construction Noise Permits.

Environmental Complaints

ES 4 No environmental complaints were received during the reporting period.

ES 5 A total of 10 environmental complaints had been received for Route 8 - Phase 1 Ngong Shuen Chau Viaduct contract since the commencement of the construction.

Notifications of Summons and Prosecution

ES 6 Since the commencement of construction, no notifications of summons nor prosecution were received on the environmental performance for this Contract.

Future Key Issues

ES 7 The tentative program of major site activities as well as the impact prediction and control measures for the coming three months, i.e. June 2006 to August 2006 are summarized below:

Construction Works	Major Impact Prediction	Control Measures
Utilities diversion; abutment and pier/portal construction, segment erection and bridge deck construction.	Air impact (dust and machine emission)	i. Frequent watering of haul road and unpaved/exposed areas; ii. Frequent watering or covering stockpiles with tarpaulin or similar means; iii. Regular maintenance of onsite machineries and vehicles; and iv. Reinstate the worked area by hydro-seed or similar means.
	Water quality impact (muddy run-off)	v. Collecting and recycling of wastewater produced on-site if possible; vi. Perimeter protection such as sandbag barriers and sealing the bottom of concrete barrier to avoid run-off entering the existing storm water drainage system; vii. Diverting the collected effluent to de-silting facilities for treatment before discharge to public drains; and viii.Covering of exposed slope with tarpaulin or similar means during rainstorm
	Noise Impact	ix. Scheduling of noisy construction activities if necessary to avoid persistent noisy operation; x. Controlling the number of plants use on site; xi. Regular maintenance of machines; and xii. Use of acoustic barriers if necessary.