Table of Contents

3. noise impacts. 3-1

3.1 Introduction. 3-1

3.2 Operational Noise. 3-1

3.2.1 Environmental Legislations, Policies, Plans and Standards. 3-1

3.2.2 Noise Sensitive Receivers. 3-1

3.2.3 Assessment Methodology. 3-11

3.2.4 Prediction and Evaluation of Noise Impacts. 3-16

3.2.5 Proposed Noise Mitigation Measures. 3-21

3.2.6 Assessment of Noise Impacts with the Application of Mitigation Measures. 3-23

3.2.7 Residual Impact 3-3333

3.2.8 Environmental Monitoring and Audit 3-3333

3.2.9 Conclusions. 3-343433

3.3 Construction Noise. 3-3434

3.3.1 Environmental Legislations, Policies, Plans and Standards. 3-3434

3.3.2 Assessment Methodology. 3-3535

3.3.3 Prediction and Evaluation of Noise Impacts. 3-3535

3.3.4 Proposed Noise Mitigation Measures. 3-4040

3.3.5 Assessment of Noise Impacts with the Application of Mitigation Measures. 3-434342

3.3.6 Residual Impact 3-4747

3.3.7 Environmental Monitoring and Audit 3-4949

3.3.8 Conclusions. 3-505049

List of Tables

Table 3‑1 Road Traffic Noise Assessment Criteria Specified in the EIAO-TM

Table 3‑2 Summary of the Identified Planned NSRs in the Project

Table 3‑3 Summary of Identified NSRs in the Project

Table 3‑4 Summary of Schools within Noise Assessment Area with Noise Mitigation Measures

Table 3‑5 Summary of Each Representative NSR

Table 3‑6 Summary of Traffic Data of Major Road Sections in the Project

Table 3‑7 Predicted Road Traffic Noise Levels at Each Identified NSR under the Unmitigated Scenario

Table 3‑8 Summary of Proposed Noise Mitigation Measures at Operational Phase for the Compliance of EIAO Noise Criteria

Table 3‑9 Predicted Road Traffic Noise Level at Each Identified NSR under the Mitigated Scenario

Table 3‑10 Total Number of Dwellings, Classrooms and Other Noise Sensitive Elements that will be Benefited From and be Protected by Provision of the Direct Noise Mitigation Measures

Table 3‑11 Predicted Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours under the Unmitigated Scenario

Table 3‑12 Maximum SWLs for Selected “Quiet” and Alternative Plants

Table 3‑13 Predicted Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours under the Mitigated Scenario

Table 3‑14 Residual Construction Noise Impact after Application of Noise Mitigation Measures

Table 3‑1 Road Traffic Noise Assessment Criteria Specified in the EIAO-TM

Table 3‑2 Summary of the Identified Planned NSRs in the Project

Table 3‑3 Summary of Identified NSRs in the Project

Table 3‑4 Summary of Schools within Noise Assessment Area with Noise Mitigation Measures

Table 3‑5 Summary of Selected Noise Assessment Points at Each Representative NSR

Table 3‑6 Summary of Traffic Data of Major Road Sections in the Project

Table 3‑7 Predicted Road Traffic Noise Levels at Each Identified NSR under the Unmitigated Scenario

Table 3‑8 Summary of Proposed Noise Mitigation Measures at Operational Phase for the Compliance of EIAO Noise Criteria

Table 3‑9 Predicted Road Traffic Noise Level at Each Identified NSR under the Mitigated Scenario

Table 3‑10 Total Number of Dwellings, Classrooms and Other Noise Sensitive Elements that will be Benefited From and be Protected by Provision of the Direct Noise Mitigation Measures

Table 3‑11 Predicted Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours under the Unmitigated Scenario

Table 3‑12 Maximum SWLs for Selected “Quiet” and Alternative Plants

Table 3‑13 Predicted Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours under the Mitigated Scenario

Table 3‑14 Residual Construction Noise Impact after Application of Noise Mitigation Measures

List of Figures

Figure 3-1 DP Road Extents of the Project

Figure 3-2 Assessment Areas for Noise Impact Assessment

Figure 3-3 Locations of Representative Noise Sensitive Receivers

Figure 3-4 Locations of Selected Noise Assessment Points at each NSR

Figure 3-5 Locations and Cross Sections of Proposed Direct Noise Mitigation Measures for Road Traffic Noise at Operation Phase

List of Appendices

Appendix 3-A Photos of Representative Noise Sensitive Receivers

Appendix 3-B Building Layout Plans of Planned NSRs – Residential Developments at TW5, TW6, TW7 and TWTL 394

Appendix 3-C Photos of NSRs which are Government Aided Schools

Appendix 3-D Source of Information Showing Government Aided Schools Under the “Noise Abatement Programme”

Appendix 3-E Photos of NSRs with Window-type Air-conditioners Installed

Appendix 3-F Source of Information Showing the Land Uses as Service Apartments with the Application of Central Air Conditioning for Chelsea Court (TWTL 373), Indi Home (TWTL 406) and H-Cube (TWTL 407)

Appendix 3-G Correspondences for the Endorsement of the Final TIA Review Report Issued in January 2007

Appendix 3-H Traffic Forecast at Year 2010 and Year 2030 in the Final TIA Review Report Issued in January 2007

Appendix 3-I Locations and Photos of Existing Noise Mitigation Measures on Route 9 in Front of Summit Terrace and on Tsuen King Circuit

Appendix 3-J Locations of Planned Noise Mitigation Measures on Tuen Mun Road and on Yeung Uk Road

Appendix 3-K Correspondence for Information of Planned Noise Mitigation Measures and Low Noise Surfacing Pavement

Appendix 3-L Typical Computer Plot of the “RoadNoise® 2000” Model

Appendix 3-M Detailed Calculations for Construction Noise Impact Assessment and Complete PME Inventory

Appendix 3-N Detailed Predicted Road Traffic Noise Results at Each Noise Assessment Point under the Unmitigated Scenario

Appendix 3-O Detailed Predicted Road Traffic Noise Results at Each Noise Assessment Point under the Mitigated Scenario

Appendix 3-P Correspondence Showing the Anticipated Development Completion Dates of Residential Development at TW5 and TW7

3. noise impacts

3.1 Introduction

3.1.1.1. Potential noise impact arising from the Project would be contributed by both construction and operational phase. This Chapter summarizes the identified potential sources of noise impact during the both phases, details of noise impact assessment and, where necessary, the recommended noise mitigation measures to reduce the identified noise impacts to acceptable levels.

3.2 Operational Noise

3.2.1 Environmental Legislations, Policies, Plans and Standards

3.2.1.1. Road traffic noise criteria are listed in Table 1A, Annex 5 of the EIAO-TM, which provides guidance on acceptable road traffic noise levels at various types of noise sensitive buildings. The relevant criteria are shown in Table 3‑1Table 3‑1Table 3‑1Table 3‑1. These standards apply to uses which rely on opened windows for ventilation.

Table 3‑1 Road Traffic Noise Assessment Criteria Specified in the EIAO-TM

Uses	Road Traffic Noise Assessment Criteria – Peak Hour Traffic (L10,1 hour, dB(A))
All domestic premises including temporary housing accommodation	70
Hotels and hostels	70
Offices	70
Educational institutions including kindergartens, nurseries and all others where unaided voice communication is required	65
Places of public worship and courts of law	65
Hospitals, clinics, convalescences and homes for the aged, diagnostic rooms, wards	55

Note: The above standards apply to uses which rely on opened windows for ventilation.

3.2.1.2. Since the Project is a road improvement work in nature which does not include fixed noise sources such as ventilation systems of tunnels, noise impact generated by fixed noise sources is not anticipated. Noise impact during the operational phase is mainly contributed by road traffic noise.

3.2.2 Noise Sensitive Receivers

Assessment Area

3.2.2.1. For operational noise impact assessment, a spatial scope of 300m from the proposed Project Boundary has been included as the Assessment Area. Road sections within the Assessment Area are classified into “roads under the Designated Project (DP roads)” or “roads not under the Designated Project (non-DP roads)” as follows:

· DP road – A road which is an expressway, trunk road, primary distributor road or district distributor road including new roads and major extensions or improvements to existing roads, as defined under item A.1, Part I, Schedule 2 of the EIAO is considered as a designated project. Meanwhile, major extensions or road improvement means a physical addition, alternation or re-alignment to existing roads which results in an adverse environmental impact as defined in the EIAO-TM. An environmental impact is considered to be adverse if any factor listed in Annex 3 of the EIAO-TM applies and the criteria in Annexes 4 to 10 of the EIAO-TM may be violated. One of the criteria for assessing if the traffic noise impact would be considered significant is that the traffic noise level with the road project would be greater than that without the road project at the design year by 1.0 dB(A) or more; and

· Non-DP road – A road section which is not classified as a DP road.

3.2.2.2. Figure 3-1 illustrates schematically the extent of DP roads in this Project. Figure 3-2 shows the Assessment Area for noise impact study in this Project.

Noise Sensitive Receivers

3.2.2.3. Representative NSRs have been identified in accordance with Annexes 5 and 13 of the EIAO-TM. In general these are noise sensitive buildings within the Noise Assessment Area, including domestic premises, hostels, temporary housing accommodation, hospitals, medical clinics, educational institutions, places of public worship, libraries, courts of law or performing art centres, having direct line-of-sight and substantial angle of view to the Project Area.

3.2.2.4. Besides, a number of planned developments (planned NSRs) have been identified and reviewed with reference to the latest published Outline Zoning Plans (OZPs) available at the commencement of the assessment. These include the planned residential developments of the Mass Transit Railway Corporation (MTRC) at TW5, TW6, and TW7, a proposed school site at TW7, as well as Tsuen Wan Town Lot (TWTL) 394. Details of the identified planned NSRs are summarized in Table 3‑2Table 3‑2Table 3‑2Table 3‑2.

Table 3‑2 Summary of the Identified Planned NSRs in the Project

Item	Descriptions	Number of Buildings within Development	Speciality of Building Design on Noise Mitigation
1	Residential Development at TW5	11	Single aspect design for six towers adjacent to/ facing Tsuen Wan Road; Acoustic fins
2	Residential Development at TW6	2	No special noise mitigation measure adopted
3	Residential Development at TW7	7	Single aspect design for two towers near Tsuen Tsing Interchange; Acoustic fins
4	Residential Development at Tsuen Wan Town Lot No. 394	2	No special noise mitigation measure adopted
5	Proposed School Site at TW7	1	No special noise mitigation measure adopted

3.2.2.5. Details of the identified existing and planned NSRs are summarized in Table 3‑3Table 3‑3Table 3‑3Table 3‑3 and their locations are shown in Figure 3-3. Photographs of the existing NSRs are shown in Appendix 3-A. Floor plans of the identified planned NSRs including Residential Developments at TW5, TW6, TW7 and TWTL 394 are provided in Appendix 3-B.

Table 3‑3 Summary of Identified NSRs in the Project

NSR ID	Descriptions	Land Use	No. of Noise Sensitive Storeys above Podium/Site Level	Existing NSR (Base Year 2006)	Planned NSR (Base Year 2006)	Remarks
N1	Tsuen Tak Gardens Block A	Residential	30	P
N2	Tsuen Tak Gardens Block B	Residential	31	P
N3	Tsuen Tak Gardens Block C	Residential	31	P
N4	Tsuen Tak Gardens Block D	Residential	31	P
N5	Tsuen Tak Gardens Block E	Residential	31	P
N6	Joyful Building Block A	Residential	27	P
N7	Joyful Building Block B	Residential	27	P
N8	Sheeny Terrace	Residential	26	P
N9	Summit Terrace Block 1	Residential	39	P
N10	Summit Terrace Block 2	Residential	39	P
N11	Summit Terrace Block 3	Residential	40	P
N12	Summit Terrace Block 5	Residential	40	P
N13	Tsuen Wan Adventist Hospital	Hospital	4	P
N14	Tsuen Wan Adventist Hospital Staff Quarter	Residential	5	P
N15	Allway Gardens Block A	Residential	22	P
N16	Allway Gardens Block B	Residential	22	P
N17	Allway Gardens Block C	Residential	22	P
N18	Wang Fat Ching She	Place of Worship	2	P		No daytime construction noise criteria in EIAO-TM
N19	The Panorama	Residential	43	P
N20	Phase I Belvedere Garden Block 1	Residential	35	P
N21	Phase I Belvedere Garden Block 2	Residential	35	P
N22	Phase I Belvedere Garden Block 3	Residential	35	P
N23	Serenade Cove Block A	Residential	33	P
N24	Serenade Cove Block B	Residential	32	P
N25	Serenade Cove Block C	Residential	33	P
N26	Phase III Belvedere Garden Block 7	Residential	41	P
N27	Phase III Belvedere Garden Block 6	Residential	41	P
N28	Phase III Belvedere Garden Block 5	Residential	41	P
N29	Fu Yung House	Residential	7	P
N30	Yen Wai Garden	Residential	23	P
N31	Tak Yan Building Stage 15	Residential	6	P
N32	On Hong Building	Residential	24	P
N33	Kan Fat Building	Residential	5	P
N34	Heung Wo Building	Residential	21	P
N35	On Fung Building	Residential	20	P
N36	Po On Commercial Association Wong Siu Ching Secondary School	School	6	P		Protected under "Noise Abatement Programme in schools", Stage IV
N37	Tsuen Wan Plaza Block 1	Residential	30	P
N38	Tsuen Wan Plaza Block 2	Residential	30	P
N39	Salvation Army Ng Kok Wai Memorial Kindergarten	School	2	P		Window glazing with window-type air-conditioners were noted on site visit
N40	Clague Garden Estate Block A	Residential	40	P
N41	Clague Garden Estate Block B	Residential	40	P
N42	Clague Garden Estate Block C	Residential	40	P
N43	Skyline Plaza	Residential	35	P
N44	Development at TW5 Cityside Tower 10	Residential	50		P	Anticipated to be completed by 2015-2016^[1]
N45	Development at TW5 Cityside Tower 11	Residential	52		P
N46	Development at TW5 Bayside Tower 1	Residential	49		P
N47	Development at TW5 Bayside Tower 2	Residential	42		P
N48	Development at TW5 Bayside Tower 3	Residential	42		P
N49	Development at TW5 Bayside Tower 4	Residential	39		P
N50	Development at TW5 Bayside Tower 5	Residential	39		P
N51	Development at TW5 Bayside Tower 6	Residential	42		P
N52	Development at TW5 Bayside Tower 7	Residential	42		P
N53	Development at TW5 Bayside Tower 8	Residential	42		P
N54	Development at TW5 Bayside Tower 9	Residential	42		P
N55	Vision City Tower 1	Residential	41	P	O	Formerly known as Development of Tsuen Wan Town Lot 398
N56	Vision City Tower 2	Residential	43	P
N57	No. 57 Yeung Uk Road	Residential	5	P
N58	No. 59-77 Yeung Uk Road	Residential	5	P
N59	Tsuen Wan Caritas Clinic	Clinic	4	P		No daytime construction noise criteria in EIAO-TM
N60	No. 85-99 Yeung Uk Road	Residential	4	P
N61	Harmony Garden Block 1	Residential	24	P
N62	Harmony Garden Block 2	Residential	24	P
N63	Development at TWTL 394 Tower 1	Residential	45		P
N64	Development at TWTL 394 Tower 2	Residential	45		P
N65	Development at TW6 Tower 1	Residential	48		P	Anticipated to be completed by 2011-2012
N66	Development at TW6 Tower 2	Residential	46		P
N67	Development at TW7 Tower 1	Residential	44		P	Anticipated to be completed by 2012 – 2014^[1]
N68	Development at TW7 Tower 2	Residential	44		P
N69	Development at TW7 Tower 3	Residential	44		P
N70	Development at TW7 Tower 4	Residential	42		P
N71	Development at TW7 Tower 5	Residential	42		P
N72	Development at TW7 Tower 6	Residential	40		P
N73	Development at TW7 Tower 7	Residential	40		P
N74	Waterside Plaza Block 1	Residential	37	P
N75	Waterside Plaza Block 2	Residential	37	P
N76	Waterside Plaza Block 3	Residential	32	P
N77	Waterside Plaza Block 4	Residential	31	P
N78	Proposed School Site at TW7	School	6	P
N79	Shak Chung Shan Memorial Catholic Primary School	School	7	P
N80	Riviera Gardens Tower 1	Residential	31	P
N81	Riviera Gardens Tower 2	Residential	32	P
N82	Riviera Gardens Tower 3	Residential	36	P
N83	Riviera Gardens Tower 4	Residential	36	P
N84	Riviera Gardens Tower 17	Residential	34	P
N85	Riviera Gardens Tower 18	Residential	34	P
N86	Riviera Gardens Tower 19	Residential	30	P
N87	Riviera Gardens Tower 20	Residential	30	P
N88	Riviera Gardens Tower 21	Residential	30	P
N89	Riviera Gardens Tower 22	Residential	30	P
N90	S K H Chu Yan Primary School	School	6	P		Protected under "Noise Abatement Programme in schools", Stage IV
N91	Kwai Shing West Estate Block 6	Residential	17	P
N92	Kwai Shing West Estate Block 8	Residential	24	P
N93	Kwai Shing West Estate Block 9	Residential	21	P
N94	Kwai Shing West Estate Block 10	Residential	14	P
N95	CNEC Lee I Yao Memorial Secondary School	School	5	P		Window glazing with window-type air-conditioners were noted on site visit
N96	Hibiscus Park Block 1	Residential	35	P
N97	Hibiscus Park Block 2	Residential	35	P

Note:

1. Latest completion programme for TW5 and TW7 are shown in Appendix 3-P

Existing Noise Sensitive Buildings with Noise Mitigation Measures

3.2.2.6. It is identified that two government-aided schools within the Noise Assessment Area – Po On Commercial Association Wong Siu Ching Secondary School (N36) and SKH Chu Yan Primary School (N90) are under the “Noise Abatement Programme in Schools” Stage IV. Meanwhile, it is noted on site visit that air-conditioners and window glazing have been equipped for other schools within the Noise Assessment Area. Summary of schools with noise mitigation measures are listed in Table 3‑4Table 3‑4Table 3‑4Table 3‑4. Site photos of existing government aided school NSRs are presented in Appendix 3-C. Source of the information for the “Noise Abatement Programme in Schools” Stage IV is attached in Appendix 3-D.

Table 3‑4 Summary of Schools within Noise Assessment Area with Noise Mitigation Measures

NSR No.	Schools	Noise Mitigation Measures Descriptions
N36	Po On Commercial Association Wong Siu Ching Secondary School	“Noise Abatement Programme in Schools” Stage IV
N90	S K H Chu Yan Primary School	“Noise Abatement Programme in Schools” Stage IV
N79	Shak Chung Shan Memorial Catholic Primary School	Double-glazed window and window-type air-conditioners noted on site visit
N95	CNEC Lee I Yao Memorial Secondary School	Double-glazed window and window-type air-conditioners noted on site visit

3.2.2.7. In addition, according to the site visit observation, window-type air-conditioners have been installed at Salvation Army Ng Kok Wai Memorial Kindergarten (N39), Tsuen Wan Adventist Hospital (N13) and Tsuen Wan Caritas Clinic (N59). Appendix 3-E shows the site conditions of these three NSRs.

3.2.2.8. Notwithstanding the provision of window-type air-conditioners and double-glazed windows as, since it is also possible for the schools and clinics abovementioned to rely on opened window ventilation, all schools and clinics within the Noise Assessment Area are still considered as NSRs for noise impact assessment.

3.2.2.9. On the other hand, Chelsea Court, H-Cube and Indi Home adjacent to Yeung Uk Road are designed as service apartments with centralized air-conditioning system. As such, it is considered that extraneous noise intrusion due to the road traffic has been minimized for these residential developments, and thus no excessive traffic noise level is anticipated. In this connection, these residential developments are not considered as NSRs. Source of information presenting the approval of service apartment design application by the Planning Department is attached in Appendix 3-F.

Noise Assessment Points

3.2.2.10. Noise assessment points are selected at each identified NSR in the Project. Details of the selected noise assessment points are summarized in Table 3-5 and their locations are demonstrated in Figure 3-4.

Table 3‑5 Summary of Selected Noise Assessment Points at Each Representative NSR

NSR ID	Description	Land Use	No. of Noise Sensitive Storeys above Podium/Site Level	Podium (P)/Site Level (S) (mPD)	No. of Noise Assessment Points at Each Floor
N1	Tsuen Tak Gardens Block A	Residential	30	16.1 (P)	1
N2	Tsuen Tak Gardens Block B	Residential	31	16.1 (P)	1
N3	Tsuen Tak Gardens Block C	Residential	31	16.1 (P)	1
N4	Tsuen Tak Gardens Block D	Residential	31	16.1 (P)	1
N5	Tsuen Tak Gardens Block E	Residential	31	16.1 (P)	1
N6	Joyful Building Block A	Residential	27	24.9 (P)	2
N7	Joyful Building Block B	Residential	27	24.9 (P)	2
N8	Sheeny Terrace	Residential	26	35.1 (P)	1
N9	Summit Terrace Tower 1	Residential	39	24.3 (P)	2
N10	Summit Terrace Tower 2	Residential	39	37.1 (P)	5
N11	Summit Terrace Tower 3	Residential	40	37.1 (P)	5
N12	Summit Terrace Tower 5	Residential	40	37.1 (P)	5
N13	Tsuen Wan Adventist Hospital	Hospital	4	37.6 (S)	1
N14	Tsuen Wan Adventist Hospital Staff Quarter	Residential	5	44.2 (S)	1
N15	Allway Gardens Block A	Residential	22	57.1 (P)	1
N16	Allway Gardens Block B	Residential	22	57.1 (P)	1
N17	Allway Gardens Block C	Residential	22	57.1 (P)	1
N18	Wang Fat Ching She	Place of Worship	2	25.3 (S)	2
N19	The Panorama	Residential	43	30.4 (P)	10
N20	Phase I Belvedere Garden Block 1	Residential	35	18.0 (P)	9
N21	Phase I Belvedere Garden Block 2	Residential	35	18.0 (P)	1
N22	Phase I Belvedere Garden Block 3	Residential	35	18.0 (P)	1
N23	Serenade Cove Block A	Residential	33	13.7 (P)	7
N24	Serenade Cove Block B	Residential	32	13.7 (P)	9
N25	Serenade Cove Block C	Residential	33	13.7 (P)	8
N26	Phase III Belvedere Garden Block 7	Residential	41	12.9 (P)	4
N27	Phase III Belvedere Garden Block 6	Residential	41	12.9 (P)	1
N28	Phase III Belvedere Garden Block 5	Residential	41	17.1 (P)	1
N29	Fu Yung House	Residential	7	4.0 (S)	2
N30	Yen Wai Garden	Residential	23	13.6 (P)	2
N31	Tak Yan Building Stage 15	Residential	6	4.0 (S)	1
N32	On Hong Building	Residential	24	10.8 (P)	2
N33	Kan Fat Building	Residential	5	4.0 (S)	1
N34	Heung Wo Building	Residential	21	13.6 (P)	1
N35	On Fung Building	Residential	20	13.6 (P)	1
N36	Wong Siu Ching Secondary School	School	6	4.0 (S)	2
N37	Tsuen Wan Plaza Block 1	Residential	30	24 (P)	7
N38	Tsuen Wan Plaza Block 2	Residential	30	24 (P)	7
N39	Salvation Army Ng Kok Wai Memorial Kindergarten	School	2	5.1 (S)	2
N40	Clague Garden Estate Block A	Residential	40	4.0 (S)	12
N41	Clague Garden Estate Block B	Residential	40	4.0 (S)	12
N42	Clague Garden Estate Block C	Residential	40	4.0 (S)	12
N43	Skyline Plaza	Residential	35	23.4 (P)	10
N44	Development at TW5 Cityside Tower 10	Residential	50	33.2 (P)	4
N45	Development at TW5 Cityside Tower 11	Residential	52	33.2 (P)	4
N46	Development at TW5 Bayside Tower 1	Residential	49	30.6 (P)	4
N47	Development at TW5 Bayside Tower 2	Residential	42	30.6 (P)	5
N48	Development at TW5 Bayside Tower 3	Residential	42	30.6 (P)	5
N49	Development at TW5 Bayside Tower 4	Residential	39	30.6 (P)	5
N50	Development at TW5 Bayside Tower 5	Residential	39	30.6 (P)	4
N51	Development at TW5 Bayside Tower 6	Residential	42	30.6 (P)	3
N52	Development at TW5 Bayside Tower 7	Residential	42	30.6 (P)	3
N53	Development at TW5 Bayside Tower 8	Residential	42	30.6 (P)	3
N54	Development at TW5 Bayside Tower 9	Residential	42	30.6 (P)	3
N55	Vision City Tower 1	Residential	41	38.4 (P)	1
N56	Vision City Tower 2	Residential	43	38.4 (P)	1
N57	No. 57 Yeung Uk Road	Residential	5	4 (S)	1
N58	No. 59-77 Yeung Uk Road	Residential	5	4 (S)	1
N59	Tsuen Wan Caritas Clinic	Clinic	4	4 (S)	1
N60	No. 85-99 Yeung Uk Road	Residential	4	4 (S)	1
N61	Harmony Garden Block 1	Residential	24	10.4 (P)	1
N62	Harmony Garden Block 2	Residential	24	10.4 (P)	1
N63	Development at TWTL 394 Tower 1	Residential	45	30.6 (P)	3
N64	Development at TWTL 394 Tower 2	Residential	45	30.6 (P)	3
N65	Development at TW6 Tower 1	Residential	48	23.5 (P)	2
N66	Development at TW6 Tower 2	Residential	46	23.5 (P)	2
N67	Development at TW7 Tower 1	Residential	44	20.5 (P)	5
N68	Development at TW7 Tower 2	Residential	44	20.5 (P)	4
N69	Development at TW7 Tower 3	Residential	44	20.5 (P)	5
N70	Development at TW7 Tower 4	Residential	42	20.5 (P)	5
N71	Development at TW7 Tower 5	Residential	42	20.5 (P)	5
N72	Development at TW7 Tower 6	Residential	40	20.5 (P)	3
N73	Development at TW7 Tower 7	Residential	40	20.5 (P)	3
N74	Waterside Plaza Block 1	Residential	37	18.2 (P)	7
N75	Waterside Plaza Block 2	Residential	37	18.2 (P)	5
N76	Waterside Plaza Block 3	Residential	32	18.2 (P)	5
N77	Waterside Plaza Block 4	Residential	31	18.2 (P)	5
N78	Proposed School Site at TW7	School	6	17.5 (S)	3
N79	Shak Chung Shan Memorial Catholic Primary School	School	7	4.5 (S)	2
N80	Riviera Gardens Tower 1	Residential	31	10.4 (P)	6
N81	Riviera Gardens Tower 2	Residential	32	10.4 (P)	4
N82	Riviera Gardens Tower 3	Residential	36	10.4 (P)	2
N83	Riviera Gardens Tower 4	Residential	36	10.4 (P)	2
N84	Riviera Gardens Tower 17	Residential	34	16.7 (P)	1
N85	Riviera Gardens Tower 18	Residential	34	16.7 (P)	2
N86	Riviera Gardens Tower 19	Residential	30	16.7 (P)	2
N87	Riviera Gardens Tower 20	Residential	30	24.6 (P)	2
N88	Riviera Gardens Tower 21	Residential	30	22.3 (P)	4
N89	Riviera Gardens Tower 22	Residential	30	22.3 (P)	6
N90	S K H Chu Tan Primary School	School	6	61 (S)	1
N91	Kwai Shing West Estate Block 6	Residential	17	51 (S)	6
N92	Kwai Shing West Estate Block 8	Residential	24	61 (S)	6
N93	Kwai Shing West Estate Block 9	Residential	21	27.5 (S)	4
N94	Kwai Shing West Estate Block 10	Residential	14	27.5 (S)	3
N95	Lee I Yao Secondary School	School	5	26.5 (S)	1
N96	Hibiscus Park Block 1	Residential	35	11 (P)	2
N97	Hibiscus Park Block 2	Residential	35	11 (P)	2

3.2.3 Assessment Methodology

Assessment Year

3.2.3.1. Traffic noise level at Year 2010 is considered as the prevailing traffic noise level, which will be applied for the assessment of the eligibility of the identified NSRs for indirect technical remedies if necessary.

3.2.3.2. According to Section 5.1, Annex 13 of the EIAO-TM and EIAO Guidance Note No. 12/2005, traffic noise impact assessment shall be conducted based on the design traffic conditions or the maximum traffic projection within 15 years upon operation of the road works (i.e. Year 2015 to Year 2030 for this Project). According to the Final Traffic Impact Assessment (TIA) Review Report issued in January 2007 by Scott Wilson in association with MVA Hong Kong Ltd., the maximum traffic flow is predicted to be in the last assessment year (i.e. Year 2030) under the “with Project” scenario.

3.2.3.3. Therefore, operational noise impact assessment for the unmitigated and mitigated scenarios for the compliance of the noise criteria stipulated in the EIAO-TM is based on the predicted traffic flow at Year 2030 under the “with Project” scenario.

Traffic Data

3.2.3.4. Traffic data for major road sections within the Noise Assessment Area of the Project at the assessment years are adopted from the endorsed Final TIA Review Report. Correspondence of the endorsement is provided in Appendix 3-G. Descriptions and road traffic flow compositions of the major roads related to the Project at Year 2030 are summarized in Table 3-6. Key plans from the Final TIA Review Report for the major road sections, as well as information showing all road segments and their traffic data are shown in Appendix 3-H. Friction course surface (pervious) is applied at any roads (DP or non-DP roads in the Project) with vehicle speed limit at least 70 kph as a high speed road standard.

Table 3‑6 Summary of Traffic Data of Major Road Sections in the Project

Road Segment Designation in TIA Review Report	Road Segment Descriptions	Category	Carriageway	Speed Limit (kph)	Road Surface	Predicted Peak Hour Flow at Year 2030 (vph)	% Heavy Vehicles
A	Tuen Mun Road (Kowloon Bound) - Hoi Hing Road Roundabout to Castle Peak Road (Tsuen Wan)	Existing Road	Single way	70	Pervious	900	49
B	Tsuen Wan Road Viaduct (Kowloon Bound) - Tuen Mun Road to Tai Chung Road Roundabout	New Road	Single way	70	Pervious	1050	58
C	Tsuen Wan Road (Kowloon Bound) - Tuen Mun Road to Tai Chung Road Roundabout	Existing Road	Single way	70	Pervious	2700	33
D	Tuen Mun Road (Kowloon Bound) - up to Tsuen Wan Road	Existing Road	Single way	70	Pervious	4650	43
E	Tuen Mun Road (Tuen Mun Bound) - from Tsuen Wan Road	Existing Road	Single way	70	Pervious	3000	56
F	Slip Road from Hoi Hing Road interchange to Tai Chung Road Roundabout	New Road	Single way	50	Impervious	1850	34
G	Slip Road from Tsuen Wan Road to Tai Chung Road Roundabout	Existing Road	Single way	50	Impervious	450	51
H	Elevated Road (Tuen Mun Bound) from Castle Peak Road - Tsuen Wan to Tuen Mun Road	Existing Road	Single way	70	Pervious	600	59
I	Tsuen Wan Road Viaduct (Kowloon Bound) - Tai Chung Road Roundabout to Wing Shun Street	New Road	Single way	70	Pervious	2900	43
J	Tsuen Wan Road (Kowloon Bound) - Tai Chung Road Roundabout	Existing Road	Single way	70	Pervious	2250	29
K	Slip Road from Tai Chung Road Roundabout to Tsuen Wan Road (Kowloon Bound)	Partially Expanded	Single way	50	Impervious	1200	46
L	Tsuen Wand Road Viaduct (Kowloon Bound) - Wing Shun Street to Wing Kei Road	New Road	Single way	70	Pervious	2300	39
M	Tsuen Wan Road (Kowloon Bound) - Tai Chung Road Roundabout to Tsuen Tsing Interchange	Existing Road	Single way	70	Pervious	3450	35
N	Slip Road from Tsuen Wan Road Viaduct to Tsuen Tsing Interchange (Kowloon Bound)	New Road	Single way	50	Impervious	600	34
O	Slip Road from Tsuen Wan Road to Tsuen Tsing Interchange (Kowloon Bound)	Existing Road	Single way	50	Impervious	1000	27
P	Tsuen Wand Road (Kowloon Bound) - Tsuen Tsing Interchange	Existing Road	Single way	70	Pervious	2450	32
Q	Slip Road from Tsuen Tsing Interchange to Tsuen Wan Road (Kowloon Bound)	New Road	Single way	50	Impervious	1900	41
R	Tsuen Wan Road (Kowloon Bound) - Tsuen Tsing Interchange to Kwai Tsing Interchange	New Road	Single way	70	Pervious	6650	38
S	Slip Road from Tsuen Wan Road to Kwai Tsing Interchange (Kowloon Bound)	Partially Expanded	Single way	70	Pervious	1600	54
T	Tsuen Wan Road Viaduct (Kowloon Bound) - Kwai Tsing Interchange	Existing Road	Single way	70	Pervious	5050	35
U	Slip Road from Kwai Tsing Interchange to Tsuen Wan Road (Kowloon Bound)	Existing Road	Single way	50	Impervious	1000	47
V	Tsuen Wan Road (Tuen Mun Bound) - Kwai Tsing Interchange	Existing Road	Single way	70	Pervious	4750	43
W	Slip Road from Tsuen Wan Road to Kwai Tsing Interchange (Tuen Mun Bound)	Existing Road	Single way	50	Impervious	950	45
X	Slip Road from Kwai Tsing Interchange to Tsuen Wan Road Viaduct (Tuen Mun Bound)	New Road	Single way	70	Pervious	800	44
Y	Tsuen Wan Road (Tuen Mun Bound) - Kwai Tsing Interchange to Tsuen Tsing Interchange	New Road	Single way	70	Pervious	5550	42
Z	Slip Road from Tsuen Wan Road to Tsuen Tsing Interchange (Tuen Mun Bound)	New Road	Single way	50	Impervious	950	31
AA	Tsuen Wand Road (Tuen Mun Bound) - Tsuen Tsing Interchange	Existing Road	Single way	70	Pervious	2550	40
AB	Tsuen Wan Road Viaduct (Kowloon Bound) - Tsuen Tsing Interchange to Tai Chung Road Roundabout	New Road	Single way	70	Pervious	2050	46
AC	Elevated Road from Tsuen Wan Road to Tsing Tsuen Road	Existing Road	Single way	50	Impervious	1700	39
AD	Slip Road from Tsuen Tsing Interchange to Tsuen Wan Road (Tuen Mun Bound)	Existing Road	Single way	50	Impervious	800	28
AE	Tsuen Wan Road (Tuen Mun Bound) - Tsuen Tsing Interchange to Tai Chung Road Roundabout	Existing Road	Single way	70	Pervious	1650	38
AF	Slip Road from Tsuen Wan Road to Tai Chung Road Roundabout (Tuen Mun Bound)	Partially Expanded	Single way	50	Impervious	1100	32
AG	Tsuen Wan Road (Tuen Mun Bound) - Tai Chung Road Roundabout	Existing Road	Single way	70	Pervious	550	51
AH	Tsuen Wan Road (Tuen Mun Bound) - Tai Chung Road Roundabout to Tuen Mun Road	Existing Road	Single way	70	Pervious	1150	49
AI	Slip Road from Tai Chung Road Roundabout to Tsuen Wan Road (Tuen Mun Bound)	Existing Road	Single way	50	Impervious	600	47
AK	Slip Road from Tsuen Wan Road Viaduct to Hoi Hing Road	New Road	Single way	50	Impervious	800	29
AL	Tsuen Wan Road Viaduct (Tuen Mun Bound) - Tai Chung Road Roundabout to Tuen Mun Road	New Road	Single way	70	Pervious	1250	62

Existing and Planned Noise Mitigation Measures on Adjacent Road Sections within the Noise Assessment Area

3.2.3.5. For the purpose of operational noise impact assessment, all existing and planned noise mitigation measures which will be completed within 15 years starting from the operation year (i.e. Year 2015) on the adjacent roads within the Noise Assessment Area have been taken into account.

3.2.3.6. Identified existing noise mitigation measures include those on Route 9 fronting Summit Terrace and Tsuen King Circuit. Their locations and site photos are shown in Appendix 3-I.

3.2.3.7. Identified planned noise mitigation measures include those in proposed road projects on Tuen Mun Road and Yeung Uk Road Widening. The locations of these planned noise mitigation measures are shown in Appendix 3-J.

3.2.3.8. Sources of information of all identified planned noise mitigation measures on the adjacent roads are shown in Appendix 3-K.

Traffic Noise Impact Prediction with Computer Model

3.2.3.9. Prediction of road traffic noise impact and necessary noise mitigation design was conducted with computer model “RoadNoise® 2000”, which adopts the methodology described in “Calculation of Road Traffic Noise (CRTN)” (1988) developed by the UK Department of Transport. CRTN takes into account all major parameters related to effective traffic noise prediction, including traffic flow and composition, road segment length and gradient, road surface, propagation characteristics, barrier and façade effects, as well as site layout settings etc.

3.2.3.10. The operational noise impact assessment was conducted based on the predicted future peak hour maximum traffic flows under the following scenarios:

· “With Project”, unmitigated scenario at the assessment year (i.e. Year 2030);

· “With Project”, mitigated scenario at the assessment year (i.e. Year 2030); and

· Prevailing scenario, i.e. “without Project” scenario at Year 2010 for indirect technical remedies eligibility assessment (if necessary)

3.2.3.11. Road traffic noise is presented in terms of noise levels exceeded for 10% of the one-hour period for the hour having the peak traffic flow (i.e. L_10,1hour, dB(A)).

3.2.3.12. Typical “RoadNoise® 2000” computer plot is shown in Appendix 3-L.

3.2.4 Prediction and Evaluation of Noise Impacts

3.2.4.1. Operational noise impact assessment under the unmitigated scenario has been conducted at the identified NSRs and the results are summarized in

3.2.4.2. Table 3-7 Table 3‑7. Detailed results at each level of each noise assessment point of the identified NSRs are presented in Appendix 3-N.

Table 3‑7 Predicted Road Traffic Noise Levels at Each Identified NSR under the Unmitigated Scenario

NSR ID	Descriptions	Range of Predicted Noise Level (Unmitigated) (L10,1 hour , dB(A)) ^[2]				Noise Standard Under EIAO-TM	EIAO Criteria Complied? ^[1]
		Overall noise level	non-DP roads only	DP roads only	Difference (Overall - non DP Roads)
N1	Tsuen Tak Gardens Block A	58~66				70	Yes
		-	-	-	-
N2	Tsuen Tak Gardens Block B	61~66				70	Yes
		-	-	-	-
N3	Tsuen Tak Gardens Block C	64~70				70	Yes
		-	-	-	-
N4	Tsuen Tak Gardens Block D	-				70	Yes
		71~73	71~73	50~58	0~0.2
N5	Tsuen Tak Gardens Block E	70				70	Yes
		71~72	71~72	53~59	0~0.3
N6	Joyful Building Block A	52~67				70	Yes
		-	-	-	-
N7	Joyful Building Block B	51~64				70	Yes
		-	-	-	-
N8	Sheeny Terrace	63~68				70	Yes
		-	-	-	-
N9	Summit Terrace Tower 1	-				70	Yes
		71~72	71~72	51~60	0~0.4
N10	Summit Terrace Tower 2	61~69				70	Yes
		71~77	71~77	60~66	0.1~0.9
N11	Summit Terrace Tower 3	59~70				70	No
		71~75	69~74	63~67	0.6~1.3
N12	Summit Terrace Tower 5	60~70				70	No
		71~75	69~74	63~68	0.9~1.8
N13	Tsuen Wan Adventist Hospital	-				55	Yes
		69~70	69~70	47~50	0~0.1
N14	Tsuen Wan Adventist Hospital Staff Quarter	69				70	Yes
		-	-	-	-
N15	Allway Gardens Block A	63~68				70	Yes
		-	-	-	-
N16	Allway Gardens Block B	61~67				70	Yes
		-	-	-	-
N17	Allway Gardens Block C	61~66				70	Yes
		-	-	-	-
N18	Wang Fat Ching She	53~60				65	Yes
		-	-	-	-
N19	The Panorama	61~70				70	No
		71~76	71~76	5~67	0~1.3
N20	Phase I Belvedere Garden Block 1	57~70				70	Yes
		71~77	70~77	39~61	0~0.5
N21	Phase I Belvedere Garden Block 2	49~70				70	Yes
		71~77	70~77	46~55	0~0.2
N22	Phase I Belvedere Garden Block 3	56~70				70	Yes
		71~77	70~77	33~52	0~0.1
N23	Serenade Cove Block A	62~69				70	Yes
		73~80	73~80	55~63	0~0.4
N24	Serenade Cove Block B	59~70				70	Yes
		71~80	70~80	57~64	0~0.7
N25	Serenade Cove Block C	63~70				70	Yes
		71~78	70~78	48~61	0~0.5
N26	Phase III Belvedere Garden Block 7	70				70	Yes
		71~79	70~79	54~62	0~0.6
N27	Phase III Belvedere Garden Block 6	-				70	Yes
		74~79	74~79	53~55	0~0.1
N28	Phase III Belvedere Garden Block 5	-				70	Yes
		73~79	73~79	52~54	0~0.1
N29	Fu Yung House	-				70	Yes
		74~78	74~78	56~60	0~0.2
N30	Yan Wai Garden	59~69				70	Yes
		71~75	70~75	60~65	0.2~0.8
N31	Tak Yan Building Stage 15	64~67				70	Yes
		-	-	-	-
N32	On Hong Building	53~70				70	Yes
		-	-	-	-
N33	Kan Fat Building	66				70	Yes
		-	-	-	-
N34	Heung Wo Building	50~68				70	Yes
		-	-	-	-
N35	On Fung Building	54~68				70	Yes
		-	-	-	-
N36	Wong Siu Ching Secondary School	-				65	Yes
		73~76	73~76	57~64	0.1~0.4
N37	Tsuen Wan Plaza Block 1	62~70				70	No
		71~73	70~72	61~68	0.5~1.6
N38	Tsuen Wan Plaza Block 2	60~70				70	No
		71	70	64	0.9~1.1
N39	Salvation Army Ng Kwok Wai Memorial Kindergarten	-				65	No
		70~78	68~76	66~73	1.5~1.9
N40	Clague Garden Estate Block A	52~70				70	No
		71~81	68~79	63~77	0.2~2.9
N41	Clague Garden Estate Block B	56~70				70	No
		71~78	68~75	65~75	1.0~3.0
N42	Clague Garden Estate Block C	68~70				70	No
		71~81	69~78	57~78	0~3.2
N43	Skyline Plaza	61~70				70	No
		71~76	69~76	50~67	0~1.9
N44	Development at TW5 Cityside Tower 10	55~70				70	No
		71~75	67~72	67~72	2.2~3.2
N45	Development at TW5 Cityside Tower 11	52~70				70	No
		71	67~68	67~68	2.8~3.3
N46	Development at TW5 Bayside Tower 1	51~70				70	No
		71~72	68~70	68~69	2.2~3.0
N47	Development at TW5 Bayside Tower 2	51~70				70	No
		71	68~69	67	2.1~2.6
N48	Development at TW5 Bayside Tower 3	51~70				70	No
		71	68~69	67~68	2.3~2.9
N49	Development at TW5 Bayside Tower 4	45~70				70	No
		71~72	68~69	68	2.5~3.0
N50	Development at TW5 Bayside Tower 5	50~61				70	No
		72~75	70~72	67~71	1.9~2.4
N51	Development at TW5 Bayside Tower 6	69~70				70	No
		71~74	68~72	66~71	1.8~2.6
N52	Development at TW5 Bayside Tower 7	66~70				70	Yes
		-	-	-	-
N53	Development at TW5 Bayside Tower 8	65~70				70	No
		71	69	65~66	1.7~2.0
N54	Development at TW5 Bayside Tower 9	68~70				70	No
		71~72	68~70	65~68	1.4~2.5
N55	Vision City Tower 1	68				70	Yes
		71~74	71~74	54~62	0~0.4
N56	Vision City Tower 2	63~70				70	Yes
		71~73	71~72	55~58	0.1~0.3
N57	No. 57 Yeung Uk Road	-				70	Yes
		78	78	36~39	0
N58	No. 59-77 Yeung Uk Road	-				70	Yes
		78	78	22	0
N59	Tsuen Wan Caritas Clinic	-				55	Yes
		79~80	79~80	22~23	0
N60	No. 85-99 Yeung Uk Road	-				70	Yes
		80~81	80~81	23	0
N61	Harmony Garden Block 1	-				70	Yes
		74~79	74~79	22	0
N62	Harmony Garden Block 2	68~70				70	Yes
		71	71	18	0
N63	Tsuen Wan Town Lot 394 Tower 1	70				70	No
		71~73	68~71	66~69	1.5~2.7
N64	Tsuen Wan Town Lot 394 Tower 2	70				70	No
		71~74	68~72	67~70	1.7~2.6
N65	Development at TW6 Tower 1	59~70				70	No
		71~78	68~75	67~74	1.9~2.9
N66	Development at TW6 Tower 2	60~70				70	No
		71~78	68~75	64~74	0.7~3.1
N67	Development at TW7 Tower 1	52~70				70	No
		71~72	68~71	64~68	1.0~2.6
N68	Development at TW7 Tower 2	47~70				70	No
		71	68	67	2.5~2.6
N69	Development at TW7 Tower 3	62~70				70	No
		71~74	68~71	67~70	2.2~2.9
N70	Development at TW7 Tower 4	64~70				70	No
		71~74	68~71	67~71	2.3~2.9
N71	Development at TW7 Tower 5	60~70				70	No
		71	68	67~68	2.8~2.9
N72	Development at TW7 Tower 6	69~70				70	No
		71~78	68~74	67~76	2.2~4.1
N73	Development at TW7 Tower 7	-				70	Yes
		73~78	73~77	58~69	0.1~0.7
N74	Waterside Plaza Block 1	55~70				70	No
		71~74	69~74	63~67	0.4~1.9
N75	Waterside Plaza Block 2	49~68				70	Yes
		-	-	-	-
N76	Waterside Plaza Block 3	58~70				70	Yes
		-	-	-	-
N77	Waterside Plaza Block 4	53~70				70	Yes
		71~72	70~72	62~64	0.5~0.8
N78	Proposed School Site at TW7	61~65				65	Yes
		66~76	65~76	59~65	0.2~0.9
N79	Shak Chung Shan Memorial Catholic Primary School	-				65	Yes
		72~73	71~73	48~56	0~0.1
N80	Riviera Gardens Tower 1	43~70				70	Yes
		71~75	70~75	40~62	0~0.5
N81	Riviera Gardens Tower 2	52~70				70	Yes
		-	-	-	-
N82	Riviera Gardens Tower 3	59~66				70	Yes
		-	-	-	-
N83	Riviera Gardens Tower 4	46~65				70	Yes
		-	-	-	-
N84	Riviera Gardens Tower 17	45~65				70	Yes
		-	-	-	-
N85	Riviera Gardens Tower 18	51~70				70	Yes
		71	71	31	0
N86	Riviera Gardens Tower 19	65~70				70	Yes
		73~76	73~76	26~31	0
N87	Riviera Gardens Tower 20	-				70	Yes
		75~79	75~79	47~61	0~0.2
N88	Riviera Gardens Tower 21	-				70	Yes
		73~77	73~77	30~65	0~0.5
N89	Riviera Gardens Tower 22	65~70				70	Yes
		71~76	71~76	42~66	0~0.7
N90	S K H Chu Yan Primary School	-				65	Yes
		71~74	71~74	50	0~0.1
N91	Kwai Shing West Est Block 6	35~70				70	Yes
		73~78	73~78	47~55	0~0.1
N92	Kwai Shing West Est Block 8	42~70				70	Yes
		71~72	71~72	25~36	0
N93	Kwai Shing West Est Block 9	36~70				70	Yes
		71~75	71~75	27~32	0
N94	Kwai Shing West Est Block 10	56~67				70	Yes
		-	-	-	-
N95	Lee I Yao Secondary School	-				65	Yes
		81~82	81~82	0	0
N96	Hibiscus Park Block 1	38~55				70	Yes
		-	-	-	-
N97	Hibiscus Park Block 2	45~59				70	Yes
		-	-	-	-

Notes:

1. EIAO noise criteria are complied if (a) overall noise level ≤ noise standards under EIAO-TM, or (b) noise level from DP roads only ≤ noise standards under EIAO-TM and difference between overall noise level and noise levels of non-DP roads < 1.0 dB(A).

2. Each representative NSR is divided into two groups according to the overall noise level, namely (a) that with overall noise level ≤ noise standards under EIAO-TM (upper row) and (b) that with overall noise level > noise standards under EIAO-TM (lower row). For group (a), three kinds of predicted noise levels, i.e. noise level from non-DP roads only, noise levels from DP roads only, and difference between overall noise levels and noise levels from non-DP roads only, are not considered (shaded). “-“ indicates that there is no assessment point represented for that NSR belongs to that overall noise level group.

3.2.4.3. Table 3-7 shows that under the unmitigated scenario the predicted road traffic noise levels at some identified NSRs (i.e. N11, N12, N19, N37 to N51, N53, N54, N63 to N72, and N74) do not comply with the EIAO noise criteria. Therefore, direct noise mitigation measures are considered necessary to reduce the road traffic noise impact.

3.2.5 Proposed Noise Mitigation Measures

Available Mitigation Options

3.2.5.1. As stated in Section 6, Annex 13 of the EIAO-TM, there is a range of possible measures available to mitigate road traffic noise. These include:

For planned developments:

· alternative land use arrangement;

· alternative sitting;

· screening by noise tolerant buildings;

· setback of buildings;

· decking over;

· extended podium;

· building orientation;

· special building design; and

· architectural features/balcony;

For existing developments:

· treatment of source;

· alternative alignment;

· noise barrier/enclosure; and

· open-textured road surfacing

3.2.5.2. In view of the practicality, roadside noise barriers are considered to be an effective and practicable mitigation option for the traffic noise impacts. In order to consider the worst-case scenario, reflective type barriers are adopted in this operational noise impact assessment.

Direct Noise Mitigation Measures

3.2.5.3. In general, concrete parapet walls of 0.8m high are adopted in this operational noise impact assessment along all elevated sections of the existing and planned roads, with the exception of the elevated roads joining Castle Peak Road – Tsuen Wan Section and Tuen Mun Road where noise barriers are currently in place.

3.2.5.4. Direct noise mitigation measures such as cantilevered noise barriers, as well as semi-enclosures or full noise enclosures have been considered for the road traffic noise impact. Major steps in the design of noise mitigation measures for the compliance of noise standards stipulated in the EIAO-TM and the requirements of EIAO Guidance Note No. 12/2005 regarding traffic noise impact assessment are as follows:

1) The predicted peak hour traffic flows at Year 2030 (highest traffic volume within 15 operational years starting from Year 2015) under the “with Project” scenario are considered to evaluate traffic noise levels at all noise assessment points.

2) “Baseline” study, which takes into account all existing representative site layouts, building developments, roads and the noise mitigation measures within the Noise Assessment Area at Year 2030, is conducted. Noise mitigation measures for the DP roads of the Project are not included in this “baseline” study (unmitigated scenario).

3) Necessary direct noise mitigation measures along the DP roads of the Project are considered based on the results from the “baseline” study.

4) The necessity for the application of direct noise mitigation measures (noise barriers/ enclosures) is determined based on the following conditions:-

5) If the predicted overall noise levels at the noise assessment points do not exceed the specified noise standards in the EIAO-TM (Table 3‑1Table 3‑1Table 3‑1Table 3‑1), no direct noise mitigation measures along the DP roads of the Project are required;

6) If the predicted overall noise levels at the noise assessment points exceed the specified noise standards stipulated in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1), direct noise mitigation measures shall be considered, such that either requirement (a) or (b)+(c) below could be fulfilled:

a) The mitigated overall noise level is not higher than the specified noise level standards in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1);

b) The mitigated noise level arising from DP roads only is not higher than the specified noise level standards in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1);

c) The contribution of the mitigated noise level arising from the DP roads to the mitigated overall noise level is less than 1.0 dB(A).

3.2.5.5. Total number of dwellings, classrooms and other noise sensitive elements that will be benefited from and be protected by provision of direct noise mitigation measures is also determined as follows:

1) Dwellings, classrooms and other noise sensitive elements that will benefit from provision of direct noise mitigation measures are those:

a) exposed to overall traffic noise levels exceeding the specified noise level standards in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1); and

b) benefited at least 1.0 dB(A) from the implementation of the direct noise mitigation measures.

2) Dwellings, classrooms and other noise sensitive elements that will be protected by provision of direct noise mitigation measures are those:

a) exposed to overall traffic noise levels exceeding the specified noise level standards in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1); and

b) exposed to overall traffic noise levels compiling with the specified noise level standards in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1) with the implementation of the direct noise mitigation measures.

Indirect Noise Mitigation Measures

3.2.5.6. In cases where practicable direct noise mitigation measures alone are not adequate in mitigating noise level for the compliance of noise standards stipulated in the EIAO-TM, indirect technical remedies for existing NSRs may be adopted provided that the residual impacts satisfy all of the following three criteria:

1) The predicted overall noise level exceeds the noise standards stipulated in the EIAO-TM ((Table 3‑1Table 3‑1Table 3‑1Table 3‑1);

2) The predicted overall noise level is at least 1.0 dB(A) more than the prevailing traffic noise level, i.e. the total traffic noise level existing before the works to construct the road were commenced (“without Project” scenario at Year 2010); and

3) The contribution from the DP roads to the increase in the predicted overall noise level is at least 1.0 dB(A).

3.2.6 Assessment of Noise Impacts with the Application of Mitigation Measures

3.1.1.1. Referring to the road traffic noise prediction results under the unmitigated scenario presented in Section 3.2.4, direct noise mitigation measures (noise barriers and enclosures) were designed along the DP roads of the Project for the compliance with the EIAO-TM noise criteria. Table 3‑8Table 3‑8Table 3‑8

3.2.6.1. Table 3‑8 summarizes the proposed direct noise mitigation measures along the DP roads of the Project. Their locations and cross-sections are illustrated graphically in Figure 3-5.

Table 3‑8 Summary of Proposed Noise Mitigation Measures at Operational Phase for the Compliance of EIAO Noise Criteria

Item	Proposed Noise Mitigation Measures			Road Name	Direction	Major NSRs Protected
	ID	Description	Length (m)
1	C1	5.5m with 3.5m cantilevered barrier	200	Tsuen Wan Road	Kowloon Bound	Summit Terrace Block 3 and Block 5 (N11, N12)
2	C2	5.5m with 3.5m cantilevered barrier	371	Tsuen Wan Road	Kowloon Bound	Development at TWTL 394 Tower 1 and Tower 2 (N63, N64)
3	C3	5.5m with 3.5m cantilevered barrier	560	Tsuen Wan Road	Kowloon Bound	Development at TW6 Tower 1 and Tower 2 (N65, N66), Development at TW7 Tower 1 to Tower 6 (N67-N72)
4	C4	5.5m with 3.5m cantilevered barrier	104	Tsuen Wan Road	Tuen Mun Bound	The Panorama (N19)
5	C5	5.5m with 3.5m cantilevered barrier	635	Tsuen Wan Road	Tuen Mun Bound	Development at TW5 Cityside Tower 10 and Tower 11 (N44, N45), Development at TWTL 394 Tower 1 and Tower 2 (N63, N64)
6	C6	5.5m with 3.5m cantilevered barrier	334	Tsuen Wan Road	Tuen Mun Bound	Development at TW5 Tower 1 (N46), Development at TW6 Tower 1 and Tower 2 (N65, N66), Development at TW7 Tower 1 (N67), Waterside Plaza Block 1 (N74)
7	S1	Semi-enclosure	50	Tsuen Wan Road	Kowloon Bound	Development at TW5 Bayside Tower 5 and Tower 6 (N50, N51)
8	S2	Semi-enclosure	229	Tsuen Wan Road	Kowloon Bound	Tsuen Wan Plaza Tower 1 and Tower 2 (N37, N38), Clague Garden Estate Block A to Block C (N40-N42), Development at TW5 Cityside Tower 10 and Tower 11 (N44, N45)
9	S3	Semi-enclosure	84	Tsuen Wan Road	Tuen Mun Bound	Development at TW5 Bayside Tower 5 and Tower 6 (N50, N51)
10	S4	Semi-enclosure	105	Tsuen Wan Road	Tuen Mun Bound	Development at TW7 Tower 3 to Tower 6 (N69 - N72)
11	F1	Full enclosure	110	Tsuen Wan Road	Kowloon Bound	Tsuen Wan Plaza Tower 1 and Tower 2 (N37, N38), Clague Garden Estate Block A to Block C (N40-N42), Development at TW5 Bayside Tower 2 to Tower 6 (N47-N51)
12	F2	Full enclosure	93	Tsuen Wan Road	Tuen Mun Bound	Tsuen Wan Plaza Tower 1 and Tower 2 (N37, N38), Clague Garden Estate Block A to Block C (N40-N42), Development at TW5 Bayside Tower 2 to Tower 6 (N47-N51)
13	F3	Full enclosure	58	Tsuen Wan Road	Tuen Mun Bound	Clague Garden Estate Block A to Block C (N40-N42), Tsuen Wan Plaza Tower 1 and Tower 2 (N37, N38), Development at TW5 Bayside Tower 8 (N53)

3.2.6.2. Table 3‑9Table 3‑9Table 3‑9Table 3‑9 summarizes the predicted road traffic noise level at each identified NSR with the proposed direct noise mitigation measures described in Table 3‑8Table 3‑8Table 3‑8Table 3‑8 adopted. Table 3‑10Table 3‑10Table 3‑10Table 3‑10 provides the total number of dwellings, classrooms and other noise sensitive elements that will be benefited from and be protected by provision of the direct noise mitigation measures. Detailed results at each floor of each noise assessment point are presented in Appendix 3-O. “RoadNoise® 2000” data files under the mitigated scenario are provided in the enclosed CD-ROM.

Table 3‑9 Predicted Road Traffic Noise Level at Each Identified NSR under the Mitigated Scenario

NSR ID	Descriptions	Range of Predicted Noise Level (Mitigated) (L10,1hour, dB(A)) ^[2]				Noise Standard Under EIAO-TM	EIAO Criteria Complied? ^[1]
		Overall noise level	non-DP roads only	DP roads only	Difference (Overall - non DP Roads
N1	Tsuen Tak Gardens Block A	58~66				70	Yes
		-	-	-	-
N2	Tsuen Tak Gardens Block B	61~66				70	Yes
		-	-	-	-
N3	Tsuen Tak Gardens Block C	64~70				70	Yes
		-	-	-	-
N4	Tsuen Tak Gardens Block D	-				70	Yes
		71~73	71~73	43~54	0~0.1
N5	Tsuen Tak Gardens Block E	70				70	Yes
		71~72	71~72	45~55	0~0.1
N6	Joyful Building Block A	52~67				70	Yes
		-	-	-	-
N7	Joyful Building Block B	51~63				70	Yes
		-	-	-	-
N8	Sheeny Terrace	63~67				70	Yes
		-	-	-	-
N9	Summit Terrace Tower 1	-				70	Yes
		71~72	71~72	47~58	0~0.2
N10	Summit Terrace Tower 2	60~70				70	Yes
		72~77	71~77	53~64	0~0.6
N11	Summit Terrace Tower 3	58~70				70	Yes
		71~74	70~74	60~65	0.3~0.8
N12	Summit Terrace Tower 5	60~70				70	Yes
		71~74	70~74	62~66	0.6~0.9
N13	Tsuen Wan Adventist Hospital	-				55	Yes
		69~70	69~70	45~47	0~0.1
N14	Tsuen Wan Adventist Hospital Staff Quarter	68~69				70	Yes
		-	-	-	-
N15	Allway Gardens Block A	63~68				70	Yes
		-	-	-	-
N16	Allway Gardens Block B	60~67				70	Yes
		-	-	-	-
N17	Allway Gardens Block C	61~66				70	Yes
		-	-	-	-
N18	Wang Fat Ching She	53~59				65	Yes
		-	-	-	-
N19	The Panorama	53~70				70	Yes
		71~76	71~76	7~65	0~0.9
N20	Phase I Belvedere Garden Block 1	51~70				70	Yes
		71~77	70~77	38~60	0~0.4
N21	Phase I Belvedere Garden Block 2	49~70				70	Yes
		71~77	70~77	37~53	0~0.1
N22	Phase I Belvedere Garden Block 3	52~70				70	Yes
		71~77	71~77	33~41	0~0.1
N23	Serenade Cove Block A	62~69				70	Yes
		73~80	73~80	53~63	0~0.4
N24	Serenade Cove Block B	59~70				70	Yes
		71~80	70~80	57~64	0~0.7
N25	Serenade Cove Block C	63~70				70	Yes
		71~78	70~78	37~57	0~0.2
N26	Phase III Belvedere Garden Block 7	70				70	Yes
		71~79	70~79	54~61	0~0.5
N27	Phase III Belvedere Garden Block 6	-				70	Yes
		74~79	74~79	53~55	0~0.1
N28	Phase III Belvedere Garden Block 5	-				70	Yes
		73~79	73~79	52~54	0~0.1
N29	Fu Yung House	-				70	Yes
		74~78	74~78	52~56	0~0.1
N30	Yan Wai Garden	59~70				70	Yes
		71~75	71~75	56~61	0~0.4
N31	Tak Yan Building Stage 15	64~67				70	Yes
		-	-	-	-
N32	On Hong Building	52~70				70	Yes
		-	-	-	-
N33	Kan Fat Building	66				70	Yes
		-	-	-	-
N34	Heung Wo Building	50~67				70	Yes
		-	-	-	-
N35	On Fung Building	54~68				70	Yes
		-	-	-	-
N36	Wong Siu Ching Secondary School	-				70	Yes
		73~76	73~76	55~60	0~0.2
N37	Tsuen Wan Plaza Block 1	60~70				70	Yes
		71~73	70~72	58~65	0.2~0.9
N38	Tsuen Wan Plaza Block 2	58~70				70	Yes
		-	-	-	-
N39	Salvation Army Ng Kwok Wai Memorial Kindergarten	-				65	Yes
		68~76	68~76	49~56	0~0.1
N40	Clague Garden Estate Block A	50~70				70	Yes
		71~79	70~79	55~70	0~0.9
N41	Clague Garden Estate Block B	55~70				70	Yes
		71~75	70~74	56~67	0.1~0.8
N42	Clague Garden Estate Block C	66~70				70	Yes
		71~78	70~78	38~68	0~0.9
N43	Skyline Plaza	58~70				70	Yes
		71~76	70~76	41~57	0~0.2
N44	Development at TW5 Cityside Tower 10	51~70				70	Yes
		71~72	71~72	52~65	0.1~0.9
N45	Development at TW5 Cityside Tower 11	50~68				70	Yes
		-	-	-	-
N46	Development at TW5 Bayside Tower 1	50~70				70	Yes
		-	-	-	-
N47	Development at TW5 Bayside Tower 2	50~70				70	Yes
		-	-	-	-
N48	Development at TW5 Bayside Tower 3	47~70				70	Yes
		-	-	-	-
N49	Development at TW5 Bayside Tower 4	41~70				70	Yes
		-	-	-	-
N50	Development at TW5 Bayside Tower 5	50~70				70	Yes
		71~73	70~72	63~64	0.6~0.9
N51	Development at TW5 Bayside Tower 6	68~70				70	Yes
		71~72	70~71	59~61	0.2~0.6
N52	Development at TW5 Bayside Tower 7	64~69				70	Yes
		-	-	-	-
N53	Development at TW5 Bayside Tower 8	64~70				70	Yes
		-	-	-	-
N54	Development at TW5 Bayside Tower 9	67~70				70	Yes
		-	-	-	-
N55	Vision City Tower 1	68				70	Yes
		71~74	71~74	48~51	0~0.1
N56	Vision City Tower 2	62~70				70	Yes
		71~72	71~72	45~47	0~0.1
N57	No. 57 Yeung Uk Road	-				70	Yes
		78	78	35~37	0
N58	No. 59-77 Yeung Uk Road	-				70	Yes
		78	78	19	0
N59	Tsuen Wan Caritas Clinic	-				55	Yes
		79~80	79~80	22	0
N60	No. 85-99 Yeung Uk Road	-				70	Yes
		80~81	80~81	23	0
N61	Harmony Garden Block 1	-				70	Yes
		74~79	74~79	22	0
N62	Harmony Garden Block 2	68~70				70	Yes
		71	71	18~19	0
N63	Tsuen Wan Town Lot 394 Tower 1	64~70				70	Yes
		-	-	-	-
N64	Tsuen Wan Town Lot 394 Tower 2	64~70				70	Yes
		71	70	63	0.7~0.8
N65	Development at TW6 Tower 1	55~70				70	Yes
		71~74	70~73	62~66	0.3~0.9
N66	Development at TW6 Tower 2	54~70				70	Yes
		71~74	70~73	61~65	0.4~0.9
N67	Development at TW7 Tower 1	52~70				70	Yes
		-	-	-	-
N68	Development at TW7 Tower 2	46~69				70	Yes
		-	-	-	-
N69	Development at TW7 Tower 3	60~70				70	Yes
		71~72	70~71	62~63	0.5~0.8
N70	Development at TW7 Tower 4	62~70				70	Yes
		71	70~71	62~63	0.6~0.9
N71	Development at TW7 Tower 5	60~70				70	Yes
		-	-	-	-
N72	Development at TW7 Tower 6	66~70				70	Yes
		71~73	70~73	46~61	0~0.5
N73	Development at TW7 Tower 7	-				70	Yes
		73~78	73~77	58~69	0.1~0.7
N74	Waterside Plaza Block 1	52~70				70	Yes
		71~73	70~73	50~56	0~0.2
N75	Waterside Plaza Block 2	49~66				70	Yes
		-	-	-	-
N76	Waterside Plaza Block 3	52~69				70	Yes
		-	-	-	-
N77	Waterside Plaza Block 4	50~70				70	Yes
		71~72	70~72	61~64	0.5~0.7
N78	Proposed School Site at TW7	60~65				65	Yes
		66~76	65~76	58~65	0.2~0.8
N79	Shak Chung Shan Memorial Catholic Primary School	-				65	Yes
		71~73	71~73	41~46	0
N80	Riviera Gardens Tower 1	43~70				70	Yes
		71~75	71~75	38~62	0~0.5
N81	Riviera Gardens Tower 2	52~69				70	Yes
		-	-	-	-
N82	Riviera Gardens Tower 3	59~66				70	Yes
		-	-	-	-
N83	Riviera Gardens Tower 4	43~65				70	Yes
		-	-	-	-
N84	Riviera Gardens Tower 17	45~65				70	Yes
		-	-	-	-
N85	Riviera Gardens Tower 18	51~70				70	Yes
		71	71	31	0
N86	Riviera Gardens Tower 19	65~70				70	Yes
		73~76	73~76	26~32	0
N87	Riviera Gardens Tower 20	-				70	Yes
		75~79	75~79	47~61	0~0.2
N88	Riviera Gardens Tower 21	-				70	Yes
		73~77	73~77	30~65	0~0.5
N89	Riviera Gardens Tower 22	65~70				70	Yes
		71~76	71~76	40~66	0~0.6
N90	S K H Chu Yan Primary School	-				65	Yes
		71~74	71~74	50	0~0.1
N91	Kwai Shing West Est Block 6	35~70				70	Yes
		73~78	73~78	47~55	0~0.1
N92	Kwai Shing West Est Block 8	42~70				70	Yes
		71~72	71~72	25~36	0
N93	Kwai Shing West Est Block 9	36~70				70	Yes
		71~75	71~75	27~32	0
N94	Kwai Shing West Est Block 10	56~67				70	Yes
		-	-	-	-
N95	Lee I Yao Secondary School	-				65	Yes
		81~82	81~82	0	0
N96	Hibiscus Park Block 1	38~55				70	Yes
		-	-	-	-
N97	Hibiscus Park Block 2	45~59				70	Yes
		-	-	-	-

Notes:

1. EIAO noise criteria are complied if (a) overall noise level ≤ noise standards under EIAO-TM, or (b) noise level from DP roads only ≤ noise standards under EIAO-TM and difference between overall noise level and noise levels of non-DP roads < 1.0 dB(A).

2. Each representative NSR is divided into two groups according to the overall noise level, namely (a) that with overall noise level ≤ noise standards under EIAO-TM (upper row) and (b) that with overall noise level > noise standards under EIAO-TM (lower row). For group (a), three kinds of predicted noise levels, i.e. noise level from non-DP roads only, noise levels from DP roads only, and difference between overall noise levels and noise levels from non-DP roads only, are not considered (shaded). “-“ indicates that there is no assessment point represented for that NSR belongs to that overall noise level group.

Table 3‑10 Total Number of Dwellings, Classrooms and Other Noise Sensitive Elements that will be Benefited From and be Protected by Provision of the Direct Noise Mitigation Measures

a) Dwellings

NSR ID	Descriptions	No. of Dwellings Represented	No of Dwellings Subject to Noise Exceeding EIAO Noise Criteria ^[1]	No of Dwellings Benefited from Noise Mitigation Measures ^[2]	No of Dwellings Protected by Noise Mitigation Measures ^[3]
N1	Tsuen Tak Gardens Block A	240	0	0	0
N2	Tsuen Tak Gardens Block B	248	0	0	0
N3	Tsuen Tak Gardens Block C	248	0	0	0
N4	Tsuen Tak Gardens Block D	248	124	0	0
N5	Tsuen Tak Gardens Block E	248	120	0	0
N6	Joyful Building Block A	108	0	0	0
N7	Joyful Building Block B	108	0	0	0
N8	Sheeny Terrace	104	0	0	0
N9	Summit Terrace Tower 1	312	156	0	0
N10	Summit Terrace Tower 2	312	153	0	1
N11	Summit Terrace Tower 3	320	135	13	6
N12	Summit Terrace Tower 5	320	159	27	35
N14	Tsuen Wan Adventist Hospital Staff Quarter	25	0	0	0
N15	Allway Gardens Block A	176	0	0	0
N16	Allway Gardens Block B	176	0	0	0
N17	Allway Gardens Block C	176	0	0	0
N19	The Panorama	344	215	79	36
N20	Phase I Belvedere Garden Block 1	280	135	41	40
N21	Phase I Belvedere Garden Block 2	280	81	0	1
N22	Phase I Belvedere Garden Block 3	280	68	0	2
N23	Serenade Cove Block A	264	99	0	0
N24	Serenade Cove Block B	256	146	0	3
N25	Serenade Cove Block C	264	75	0	17
N26	Phase III Belvedere Garden Block 7	328	159	0	4
N27	Phase III Belvedere Garden Block 6	328	123	0	0
N28	Phase III Belvedere Garden Block 5	328	123	0	0
N29	Fu Yung House	28	28	0	0
N30	Yan Wai Garden	46	34	0	1
N31	Tak Yan Building Stage 15	24	0	0	0
N32	On Hong Building	192	0	0	0
N33	Kan Fat Building	100	0	0	0
N34	Heung Wo Building	84	0	0	0
N35	On Fung Building	80	0	0	0
N37	Tsuen Wan Plaza Block 1	240	126	3	5
N38	Tsuen Wan Plaza Block 2	240	0	0	10
N40	Clague Garden Estate Block A	480	362	342	9
N41	Clague Garden Estate Block B	480	237	250	13
N42	Clague Garden Estate Block C	480	383	338	7
N43	Skyline Plaza	280	105	83	13
N44	Development at TW5 Cityside Tower 10	450	45	98	53
N45	Development at TW5 Cityside Tower 11	468	0	35	35
N46	Development at TW5 Bayside Tower 1	294	0	43	43
N47	Development at TW5 Bayside Tower 2	294	0	25	25
N48	Development at TW5 Bayside Tower 3	294	0	27	27
N49	Development at TW5 Bayside Tower 4	273	0	32	32
N50	Development at TW5 Bayside Tower 5	234	115	117	2
N51	Development at TW5 Bayside Tower 6	252	47	104	57
N52	Development at TW5 Bayside Tower 7	252	0	0	0
N53	Development at TW5 Bayside Tower 8	252	0	0	7
N54	Development at TW5 Bayside Tower 9	252	0	56	72
N55	Vision City Tower 1	287	120	0	0
N56	Vision City Tower 2	301	114	0	0
N57	No. 57 Yeung Uk Road	5	5	0	0
N58	No. 59-77 Yeung Uk Road	50	50	0	0
N60	No. 85-99 Yeung Uk Road	32	32	0	0
N61	Harmony Garden Block 1	120	96	0	0
N62	Harmony Garden Block 2	120	32	0	0
N63	Tsuen Wan Town Lot 394 Tower 1	132	0	130	130
N64	Tsuen Wan Town Lot 394 Tower 2	132	9	131	122
N65	Development at TW6 Tower 1	384	89	244	155
N66	Development at TW6 Tower 2	368	114	203	89
N67	Development at TW7 Tower 1	264	0	50	50
N68	Development at TW7 Tower 2	264	0	8	8
N69	Development at TW7 Tower 3	264	22	44	22
N70	Development at TW7 Tower 4	252	18	42	24
N71	Development at TW7 Tower 5	252	0	9	9
N72	Development at TW7 Tower 6	240	30	97	67
N73	Development at TW7 Tower 7	240	120	0	0
N74	Waterside Plaza Block 1	222	31	61	31
N75	Waterside Plaza Block 2	222	0	0	0
N76	Waterside Plaza Block 3	192	0	0	0
N77	Waterside Plaza Block 4	186	39	0	0
N80	Riviera Gardens Tower 1	248	67	0	1
N81	Riviera Gardens Tower 2	256	0	0	0
N82	Riviera Gardens Tower 3	288	0	0	0
N83	Riviera Gardens Tower 4	288	0	0	0
N84	Riviera Gardens Tower 17	272	0	0	0
N85	Riviera Gardens Tower 18	272	28	0	0
N86	Riviera Gardens Tower 19	240	60	0	0
N87	Riviera Gardens Tower 20	240	120	0	0
N88	Riviera Gardens Tower 21	240	120	0	0
N89	Riviera Gardens Tower 22	240	122	0	0
N91	Kwai Shing West Est Block 6	740	170	0	0
N92	Kwai Shing West Est Block 8	1,056	396	0	0
N93	Kwai Shing West Est Block 9	576	150	0	0
N94	Kwai Shing West Est Block 10	560	0	0	0
N96	Hibiscus Park Block 1	210	0	0	0
N97	Hibiscus Park Block 2	210	0	0	0
	Total:	22,855	5,707	2,732	1,264

b) Classrooms

NSR ID	Descriptions	No. of Classrooms Represented	No of Classrooms Subject to Noise Exceeding EIAO Noise Criteria ^[1]	No of Classrooms Benefited from Noise Mitigation Measures ^[2]	No of Classrooms Protected by Noise Mitigation Measures ^[3]
N36	Wong Siu Ching Secondary School	48	24	0	0
N39	Salvation Army Ng Kwok Wai Memorial Kindergarten	12	12	12	0
N78	Proposed School Site at TW7	48	24	0	0
N79	Shak Chung Shan Memorial Catholic Primary School	56	49	0	0
N90	S K H Chu Yan Primary School	36	36	0	0
N95	Lee I Yao Secondary School	40	30	0	0
	Total:	240	175	12	0

c) Other Noise Sensitive Elements

NSR ID	Descriptions	No. of Noise Sensitive Elements Represented	No of Noise Sensitive Elements Subject to Noise Exceeding EIAO Noise Criteria ^[1]	No of Noise Sensitive Elements Benefited from Noise Mitigation Measures ^[2]	No of Noise Sensitive Elements Protected by Noise Mitigation Measures ^[3]
N13	Tsuen Wan Adventist Hospital	36	36	0	0
N18	Wang Fat Ching She	2	0	0	0
N59	Tsuen Wan Caritas Clinic	40	40	0	0
	Total:	78	76	0	0

Notes:

1. Number of dwellings, classrooms and other noise sensitive exposed to overall road traffic noise levels exceeding the noise standards stipulated in the EIAO-TM (Table 3‑1Table 3‑1Table 3‑1Table 3‑1).

2. Dwellings, classrooms and other noise sensitive elements be benefited from noise mitigation measures are those exposed to overall road traffic noise exceeding noise standards stipulated in the EIAO-TM (Table 3‑1Table 3‑1Table 3‑1Table 3‑1) under unmitigated scenario and be benefited at least 1.0 dB(A) from the implementation of the noise mitigation measures.

3. Dwellings, classrooms and other noise sensitive elements protected by noise mitigation measures are those exposed to overall road traffic noise exceeding noise standards stipulated in the EIAO-TM (Table 3‑1Table 3‑1Table 3‑1Table 3‑1) under unmitigated scenario and exposed to overall road traffic noise compiling with the noise standards stipulated in the EIAO-TM (Table 3‑1Table 3‑1Table 3‑1Table 3‑1) with the implementation of the noise mitigation measures.

3.2.6.3. Table 3‑9Table 3‑9Table 3‑9Table 3‑9 shows that with the application of the proposed direct noise mitigation measures along the DP roads, the predicted overall road traffic noise levels at all of the identified NSRs will comply with the noise standards stipulated in the EIAO-TM, or that the predicted road traffic noise level from the DP roads only will not exceed the noise standards stipulated in the EIAO-TM and the contribution of traffic noise arising from the DP roads to the overall noise level will be less than 1.0 dB(A). In this connection, the application of indirect noise mitigation measures is considered not necessary.

3.2.6.4. In view of the results listed on Table 3‑9Table 3‑9, it can be noted that noise contribution from the DP roads to the overall noise level, after the incorporation of proposed traffic noise mitigation measures, will be all less than 1.0 dB(A). In other words, there will be insignificant traffic noise contributed by the DP roads to all of the identified existing and planned NSRs, and thus complies with the EIAO noise criteria.Not used.

3.2.6.5. Despite the compliance of the EIAO noise criteria with the proposed noise mitigation measures at DP roads, it is noted from Table 3‑9Table 3‑9Table 3‑9Table 3‑9 that the overall noise levels at some NSRs, particularly at The Panorama and Clague Garden Estate, still exceed the standards by up to 9 dB(A) (N40 - Clague Garden Estate Block A). Discussion of residual impacts is presented in Section 3.2.7.

3.2.6.6. It is estimated, as shown in Table 3‑10Table 3‑10Table 3‑10Table 3‑10, that 2,712 744 of the represented dwellings, classrooms and other noise sensitive elements will be benefited from, and 1,264 of them will be protected by provision of the proposed noise mitigation measures.

3.2.7 Residual Impact

3.2.7.1. Despite the compliance of the EIAO noise criteria with the proposed noise mitigation measures at DP roads, it is noted from Table 3‑9Table 3‑9Table 3‑9Table 3‑9 that the overall noise levels, particularly at The Panorama and Clague Garden Estate, still exceed the noise standards stipulated by the EIAO-TM (Table 3‑1Table 3‑1Table 3‑1Table 3‑1) by up to 9 dB(A) (N40 - Clague Garden Estate Block A).

3.2.7.2. In order to provide additional noise mitigation to the tenants living at both The Panorama and Clague Garden Estate, a retrofitting study based on the noise mitigation measures presented in this report for the compliance of EIAO noise criteria will be conducted. Results and findings shall be presented in a separate environmental review report.

3.2.8 Environmental Monitoring and Audit

3.2.8.1. Road traffic noise monitoring is recommended at representative NSRs during the first year of the road opening.

3.2.8.2. Recommended noise mitigation measures and their detailed implementation schedules, as well as monitoring procedures and locations are presented in the EM&A Manual. Traffic noise impacts and effectiveness of the noise mitigation measures could be evaluated through the monitoring exercise.

3.2.9 Conclusions

3.2.9.1. In this operational noise impact assessment, the potential traffic noise impacts on the identified NSRs within the Assessment Area have been evaluated based on the maximum traffic flow projection of 15 years after the completion of the Project (i.e. Year 2030). It was predicted that the traffic noise levels arising from the Project at some NSRs exceed the EIAO criteria. As a result, direct noise mitigation measures including cantilevered noise barriers, semi and full noise enclosures have been proposed for the compliance of noise criteria stipulated in the EIAO-TM and EIAO Guidance Note No. 12/2005. With the incorporation of these proposed direct noise mitigation measures, it is anticipated that the noise levels at all of the identified NSRs will comply with the criteria. Implementation of indirect noise mitigation measures is therefore considered not necessary.

3.2.9.2. In order to provide additional noise mitigation to the tenants living at both The Panorama and Clague Garden Estate, where the overall noise levels exceed the noise standards stipulated in the EIAO-TM, a retrofitting study based on the proposed noise mitigation measures for the compliance of EIAO noise criteria will be conducted. Results and findings shall be presented in a separate environmental review report.

3.2.9.3. Monitoring of road traffic noise is recommended to verify the effectiveness of the mitigation scheme during the first year after road opening. More details are provided in the stand-alone EM&A Manual.

3.3 Construction Noise

3.3.1 Environmental Legislations, Policies, Plans and Standards

3.3.1.1. In Hong Kong, control of construction noise is carried out under the Noise Control Ordinance (NCO) and the two subsidiary Technical Memoranda on Noise from Percussive Piling (PP-TM) and Noise from Construction Work Other Than Percussive Piling (GW-TM). Construction Noise Permit (CNP) is required for carrying out percussive piling at daytime on a day not being a general holiday and for carrying out general construction works during restricted hours (i.e. 1900 to 0700 hours on a day not being a general holiday and at any time on a general holiday). In addition, there are provisions under the Environmental Impact Assessment Ordinance (EIAO) and the associated Technical Memorandum (EIAO-TM) for assessing the impacts from construction activities during 0700 to 1900 hours on a day not being a general holiday.

3.3.1.2. An additional technical memorandum, the Technical Memorandum on Noise from Construction Work in Designated Areas (DA-TM), deals with the control of noise generated by Specified Powered Mechanical Equipment (SPME) and Prescribed Construction Works (PCWs) in designated areas. SPME includes hand-held breaker, bulldozer, concrete lorry mixer, dump truck and hand-held poker vibrator; PCWs include erection/dismantling of formwork/scaffolding, loading/unloading or handling of rubble, wooden boards, steel bars, wood or scaffolding material, and hammering. Since a section of the Assessment Area between Tai Chung Interchange and Tsuen Tsing Interchange is within the designated areas, CNP is required for this section of the Project for carrying out PCWs and construction works involving the use of SPME during restricted hours (i.e. 1900 to 0700 hours and anytime on a general holiday).

3.3.1.3. For constructions carried out on a day not being a general holiday, daytime period (i.e. 0700 to 1900 hours), noise standard of 75 dB(A) L_{eq,30 min}, as stipulated in Table 1B, Annex 5 of the EIAO-TM, is adopted for this assessment for all domestic premises including temporary housing accommodations and hostels. For schools, a daytime noise standard of 70 dB(A) L_{eq,30 min}, lowered to 65 dB(A) L_{eq,30 min} during examination periods, is adopted. These standards apply to uses which rely on opened windows for ventilation.

3.3.1.4. Subsidiary regulations of the NCO include the Noise Control (Hand Held Percussive Breakers) and Noise Control (Air Compressors) Regulations, which require compliance with relevant noise emission standards and the fixing of noise emission labels to specified plants and equipment. While these requirements are not directly relevant to the construction noise impact assessment, contractors must meet them during the construction phase of the Project.

3.3.1.5. Percussive piling is prohibited between 1900 and 0700 hours on a day not being a general holiday and at any time on a general holiday. A CNP is required for carrying out of percussive piling between 0700 and 1900 hours on a day not being a general holiday.

3.3.2 Assessment Methodology

3.3.2.1. Methodology for assessing noise from the construction activities associated with the proposed works is developed based on the GW-TM and is summarized as follows:

· location of appropriate NSRs with respect to the work sites;

· determination of distance attenuation and screening effects to NSRs from notional noise source of relevant work site;

· prediction of construction noise levels at NSRs in the absence of any mitigation measures;

· proposal of mitigation measures and determine their effectiveness; and

· determination of the residual impacts.

3.3.2.2. The construction noise impacts have been assessed against the noise standards given in the EIAO-TM as follows:

· 75 dB(A) L_eq,30min for residential dwellings;

· 70 dB(A) L_eq,30min for schools; and

· 65 dB(A) Leq,30min for schools during examination period.

3.3.2.3. The construction noise impacts have been assessed at the identified NSRs as listed in Table 3‑3Table 3‑3Table 3‑3Table 3‑3.

3.3.3 Prediction and Evaluation of Noise Impacts

3.3.3.1. Construction activities for the proposed upgrading works in the Project include the following:

· slope excavation;

· reinforced slopes and slope compaction;

· slope trimming and landscaping;

· bridge deck construction;

· road pavement construction;

· road drainage construction; and

· piling works

3.3.3.2. The extent of construction noise impacts depends on the type and number of Power Mechanical Equipment (PME) to be used in different construction activities and varies during different construction phases. As shown in Figure 2-3, the proposed construction programme is expected to last for 48 months, from June 2011 to May 2015. The construction activities are expected to be conducted only during normal daytime working hours (i.e. 0700 to 1900 hours on any day not being a Sunday or public holiday). The corresponding predicted construction noise levels of the construction activities listed in Section 3.3.3.1 at the representative NSRs between Year 2010 and 2015 are shown in Table 3-11. Detailed calculations of the construction noise impact assessment and complete PME inventory are provided in Appendix 3-M.

3.3.3.3. Planned NSRs have also been taken into account in this construction noise assessment. Correspondence showing anticipated completion dates of planned residential developments at TW5, TW6 and TW7 are shown in Appendix 3-P. The period during which respective planned NSRs would be exposed to the construction noise impact from the Project are as follows:

· Development at TW5 (N44 to N54) January 2015 to May 2015.

· Development at TW6 (N65 to N66) June 2011 to May 2015

· Development at TW7 (N67 to N73) January 2012 to May 2015.

· Development at TWTL 394 (N63 to N64) June 2011 to May 2015

· Proposed School Site at TW7 (N78) June 2011 to May 2015

3.3.3.4. The predicted construction noise levels shown in Table 3-11 indicate that construction activities of the Project, if unmitigated, would result in exceedance of the daytime construction noise criteria during normal working hours at 31 existing NSRs and 21 planned NSRs. Mitigation measures are therefore considered necessary to reduce the construction noise impact to acceptable levels.

Table 3‑11 Predicted Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours under the Unmitigated Scenario

NSR ID	Descriptions	Land Use	ANL, dB(A)	Maximum Predicted Construction Noise Levels at each Assessment Year (Leq, dB(A))
				2011	2012	2013	2014	2015
N1	Tsuen Tak Gardens Block A	Residential	75	71	71	71	67	40
N2	Tsuen Tak Gardens Block B	Residential	75	70	71	71	70	62
N3	Tsuen Tak Gardens Block C	Residential	75	70	72	72	70	61
N4	Tsuen Tak Gardens Block D	Residential	75	70	71	71	71	62
N5	Tsuen Tak Gardens Block E	Residential	75	71	73	73	71	63
N6	Joyful Building Block A	Residential	75	73	73	73	71	63
N7	Joyful Building Block B	Residential	75	72	72	72	70	62
N8	Sheeny Terrace	Residential	75	74	74	73	71	64
N9	Summit Terrace Tower 1	Residential	75	73	74	74	71	63
N10	Summit Terrace Tower 2	Residential	75	77	78	78	75	67
N11	Summit Terrace Tower 3	Residential	75	78	79	79	75	68
N12	Summit Terrace Tower 5	Residential	75	80	80	79	76	69
N13	Tsuen Wan Adventist Hospital	Hospital	70	74	74	72	70	62
N14	Tsuen Wan Adventist Hospital Staff Quarter	Residential	75	74	75	75	72	65
N15	Allway Gardens Block A	Residential	75	73	74	74	71	64
N16	Allway Gardens Block B	Residential	75	72	72	71	69	62
N17	Allway Gardens Block C	Residential	75	72	72	71	69	62
N18^[4]	Wang Fat Ching She	Place of Worship	70	79	73	70	67	62
N19	The Panorama	Residential	75	81	84	78	78	72
N20	Phase I Belvedere Garden Block 1	Residential	75	74	75	72	72	65
N21	Phase I Belvedere Garden Block 2	Residential	75	73	74	72	71	63
N22	Phase I Belvedere Garden Block 3	Residential	75	71	72	71	69	62
N23	Serenade Cove Block A	Residential	75	74	76	75	72	64
N24	Serenade Cove Block B	Residential	75	74	76	74	73	65
N25	Serenade Cove Block C	Residential	75	74	76	74	72	65
N26	Phase III Belvedere Garden Block 7	Residential	75	59	43	43	43	40
N27	Phase III Belvedere Garden Block 6	Residential	75	59	43	43	43	40
N28	Phase III Belvedere Garden Block 5	Residential	75	58	43	43	43	40
N29	Fu Yung House	Residential	75	70	75	77	75	71
N30	Yen Wai Garden	Residential	75	68	68	71	71	69
N31	Tak Yan Building Stage 15	Residential	75	69	69	71	71	69
N32	On Hong Building	Residential	75	69	69	71	71	70
N33	Kan Fat Building	Residential	75	70	70	72	72	71
N34	Heung Wo Building	Residential	75	69	69	72	72	70
N35	On Fung Building	Residential	75	70	72	75	75	72
N36	Wong Siu Ching Secondary School	School	65/70^[2]	76	80	81	81	76
N37	Tsuen Wan Plaza Block 1	Residential	75	72	72	75	75	73
N38	Tsuen Wan Plaza Block 2	Residential	75	71	71	73	73	72
N39	Salvation Army Ng Kok Wai Memorial Kindergarten	School	65/70^[2]	83	91	94	93	88
N40	Clague Garden Estate Block A	Residential	75	82	87	88	87	82
N41	Clague Garden Estate Block B	Residential	75	79	85	86	86	81
N42	Clague Garden Estate Block C	Residential	75	82	89	92	92	87
N43	Skyline Plaza	Residential	75	84	85	87	87	84
N44	Development at TW5 Cityside Tower 10	Residential	75	[1]				83
N45	Development at TW5 Cityside Tower 11	Residential	75					78
N46	Development at TW5 Bayside Tower 1	Residential	75					76
N47	Development at TW5 Bayside Tower 2	Residential	75					40
N48	Development at TW5 Bayside Tower 3	Residential	75					76
N49	Development at TW5 Bayside Tower 4	Residential	75					40
N50	Development at TW5 Bayside Tower 5	Residential	75					77
N51	Development at TW5 Bayside Tower 6	Residential	75					79
N52	Development at TW5 Bayside Tower 7	Residential	75					85
N53	Development at TW5 Bayside Tower 8	Residential	75					86
N54	Development at TW5 Bayside Tower 9	Residential	75					86
N55	Vision City Tower 1	Residential	75	75	79	79	79	74
N56	Vision City Tower 2	Residential	75	70	70	73	73	71
N57	No. 57 Yeung Uk Road	Residential	75	74	78	78	76	70
N58	No. 59-77 Yeung Uk Road	Residential	75	66	66	62	62	61
N59^[4]	Tsuen Wan Caritas Clinic	Clinic	70	73	77	77	75	67
N60	No. 85-99 Yeung Uk Road	Residential	75	71	74	74	69	64
N61	Harmony Garden Block 1	Residential	75	70	73	73	66	60
N62	Harmony Garden Block 2	Residential	75	70	72	72	65	60
N63	Development at TWTL 394 Tower 1	Residential	75	77	81	81	80	72
N64	Development at TWTL 394 Tower 2	Residential	75	78	82	81	79	72
N65	Development at TW6 Tower 1	Residential	75	82	86	86	84	72
N66	Development at TW6 Tower 2	Residential	75	83	87	86	81	72
N67	Development at TW7 Tower 1	Residential	75	[1] [1]	90	89	85	79
N68	Development at TW7 Tower 2	Residential	75		89	89	87	81
N69	Development at TW7 Tower 3	Residential	75		89	88	86	81
N70	Development at TW7 Tower 4	Residential	75		86	86	86	80
N71	Development at TW7 Tower 5	Residential	75		86	86	86	81
N72	Development at TW7 Tower 6	Residential	75		89	89	90	84
N73	Development at TW7 Tower 7	Residential	75		92	92	87	81
N74	Waterside Plaza Block 2	Residential	75	87	90	90	88	76
N75	Waterside Plaza Block 2	Residential	75	87	90	89	88	77
N76	Waterside Plaza Block 3	Residential	75	86	89	89	87	77
N77	Waterside Plaza Block 4	Residential	75	84	87	87	85	76
N78	Proposed School Site at TW7	School	65/70^[2]	82	85	85	83	73
N79	Shak Chung Shan Memorial Catholic Primary School	School	65/70^[2]	79	82	81	79	71
N80	Riviera Gardens Tower 1	Residential	75	77	80	80	78	69
N81	Riviera Gardens Tower 2	Residential	75	73	75	74	72	40
N82	Riviera Gardens Tower 3	Residential	75	70	72	72	70	40
N83	Riviera Gardens Tower 4	Residential	75	68	70	70	69	40
N84	Riviera Gardens Tower 17	Residential	75	70	72	72	70	40
N85	Riviera Gardens Tower 18	Residential	75	69	72	72	70	40
N86	Riviera Gardens Tower 19	Residential	75	68	70	70	68	40
N87	Riviera Gardens Tower 20	Residential	75	72	75	75	74	67
N88	Riviera Gardens Tower 21	Residential	75	75	78	78	76	69
N89	Riviera Gardens Tower 22	Residential	75	76	80	80	78	70
N90	S K H Chu Tan Primary School	School	65/70^[2]	76	78	78	75	68
N91	Kwai Shing West Estate Block 6	Residential	75	74	77	77	72	64
N92	Kwai Shing West Estate Block 8	Residential	75	77	78	78	75	69
N93	Kwai Shing West Estate Block 9	Residential	75	74	74	74	73	68
N94	Kwai Shing West Estate Block 10	Residential	75	74	74	74	73	68
N95	Lee I Yao Secondary School	School	65/70^[2]	80	80	82	81	75
N96	Hibiscus Park Block 1	Residential	75	67	67	68	67	40
N97	Hibiscus Park Block 2	Residential	75	66	66	43	43	40

Notes:

1. According to the latest construction programme, residential development at TW5 is anticipated to be completed by Year 2015 to 2016. In addition, residential development at TW6 and TW7 is expected to be completed by Year 2012 the earliest. Therefore, these dwellings are not considered as NSRs for construction noise impact before the corresponding year of completion.

2. Construction noise standard for schools is 70 dB(A) at normal school days and is reduced to 65 dB(A) during examination period. The more conservative 65 dB(A) standard is applied in this construction noise impact assessment.

3. Noise levels exceeding the construction noise standards are bold.

4. There are no specific daytime construction noise criteria in EIAO-TM for place of worship (N18 Wang Fat Ching She) and clinic (N59 Tsuen Wan Caritus Clinic)

3.3.4 Proposed Noise Mitigation Measures

3.3.4.1. Mitigation measures are required for the NSRs at which unmitigated construction noise levels are predicted to exceed the corresponding construction noise criteria as shown in Table 3-11.

Available Construction Noise Mitigation Measures

3.3.4.2. A number of available construction noise mitigation measures have been considered in this assessment, including:

· selection and optimization of construction programmes, avoidance of parallel operation of noisy PME, and/or reduction in number and/or the on-time percentage of PME during noise sensitive periods such as school examination period;

· use of “quiet” PME and working methods;

· use of temporary at-source noise mitigation measures such as noise barriers, noise enclosures, noise jacket and mufflers; and

· use of good site practice to limit noise emission from construction site.

Selection and Programming of Construction Processes

3.3.4.3. The timing and sequencing of the various construction activities shall be carefully arranged according to the actual site work situation, in order to limit the amount of concurrent activities and where applicable, to avoid parallel operation of noisy PME in order to minimize the total noise generated during construction periods. Limiting the quantity of PME to be operated concurrently and also their on-time percentage were recommended in the Project and incorporated in this assessment. The proposed quantity of PMEs and their percentage on-time have been confirmed feasible by the Project Engineer and the Proponent. In the case during school examination while more stringent construction noise criteria should be imposed, the potentially most disruptive construction activities should be avoided, and arranged to be conducted during school holidays as far as practicable. In particular, NSR 39 (Salvation Army Ng Kok Wai Memorial Kindergarten) is of close proximity to works area S5 and subject to high level of unmitigated construction noise. It is recommended that the work stages “transportation & utilities diversion” and “piling” shall not take place simultaneously during operation time of the kindergarten for the same location in works area S5, such that cumulative noise to this kindergarten is further minimized. This requirement will be specified in the EM&A Manual for Contractor to follow.

Use of “Quiet” Alternative Plant and Working Methods

3.3.4.4. The use of particular plant with equipment noise levels quieter than those specified in the GW-TM can result in reduction of noise levels generated by the plant. The level of noise reduction achieved is dependent on the contractor’s chosen methods of working. It is possible for the contractor to achieve noise reductions from the adopted working methodologies by specifying maximum limits of sound power level for specific plant equipment.

3.3.4.5. “Quiet” plant is defined as a PME having actual Sound Power Levels (SWLs) lower than the values specified for PME in the GW-TM. SWLs for typical PME provided in the GW-TM and that for equivalent “quiet” plants are presented in Table 3‑12Table 3‑12Table 3‑12Table 3‑12.

3.3.4.6. The type of quiet PME adopted in this assessment is for reference only and to be confirmed by the contractors, based on the actual construction conditions and programmes. The contractors are allowed to use other type of quiet PME to meet their needs.

Table 3‑12 Maximum SWLs for Selected “Quiet” and Alternative Plants

Identification Code in GW-TM	Descriptions of PME	SWL in GW-TM	Identification Code in BS5228 ^[1]	SWL of “quiet” PME, dB(A) ^[1]
CNP 068 ^[2]	Dump Truck	105	C9/3920	103
CNP 185	Road Roller	108	C8/25	96
CNP 081	Excavator / loader	112	C3/61	104
CNP 048	Mobile Crane	112	C7/114	101
CNP 142	Lorry	105	C8/25	96
CNP 001	Air Compressor, Air Flow 10 m^3/min	100	C7/17	90
CNP 101	Generator, Standard	108	C7/54	89
CNP 044	Concrete Lorry Mixer	109	C6/23	100
CNP 170	Poker Vibrator, Hand-held	113	C6/32	100
CNP141^[23]	Segment Transporter	112	C9/3940^[34]	1043
CNP004	Asphalt Paver	109	C8/24	101
CNP185	Road Roller	108	C8/25	96
CNP 028	Breaker, excavator mounted	122	C8/13	110
CNP 186	Roller, vibratory	108	C3/116	106

Notes:

1. BS-5528 Part 1: 1997 – Noise and Vibration Control on Construction and Open Sites – Part 1: Code of practice for basic information and procedures for noise and vibration control

1. C9/27 in BS-5228 Part 1:1997 was referenced considering the task nature and maximum capacity requirement of 38 tonnes for dump truck under this Project.

2. Lorry in GW-TM was referenced considering the task nature and capacity requirement for segment transporter.

3. C9/39 40 in BS5228 was referenced considering the task nature and capacity requirement for segment transporter.

Temporary Noise Barriers

3.3.4.7. Temporary noise barriers provide noise attenuation by screening NSRs from stationary and mobile plants from direct line-of-sight in shadow zone. The use of 3m high moveable barriers with skid footing and a small cantilevered upper portion can be located within 6m from stationary plants and about 5m from mobile plants such as excavators and bulldozersadopted. The barrier material shall have a surface mass of not less than 14kg/m² on skid footing with 25mm thick internal sound absorptive lining to achieve the maximum screening effect. Whilst screening effects can be achieved at upper floors of NSRs, greater benefits result at lower floors where screening is the most effective. These temporary noise barriers will become more effective when located immediately adjacent to working area, and can reduce the noise level by up to 5 dB(A) and 10 dB(A) for mobile and stationary plant, respectively. The temporary noise barriers should also be located along the working area in order to make sure that the construction plant could be screened during all kinds of construction activities as far as practicable. A solid hoarding will also be provided along the NSR 39 of height not less than 3m and length well cover the NSR39, so as to further reduce the construction noise impacts at NSR39.

3.3.4.8. Depending on site situation, when temporary noise barriers are not practicable or noise reduction achieved is insufficient, noise jacket/muffler can be applied to cover the noisy part of the engine or at the engine exhaust of particular mobile plants respectively. Applicable PME with temporary noise barrier include road roller, excavator, mobile crane, hand-held breaker, poker vibrator, excavator mounted breaker, asphalt paver, vibratory roller and paint line marker. It is assumed that temporary noise barriers of this type can provide partial screening effect of 5 dB(A) for mobile plants in the assessment. Considered the practicability, the site access of dump trucks would not be screened by temporary barrier; yet, the unloading activities of dump trucks should be screened by temporary noise barriers. In this connection, the screening effect by temporary barrier on dump truck would not be accounted in the construction noise impact assessment.

3.3.4.9. For the stationary plant bored pile oscillator, temporary noise barriers of sufficient height with skid footing and small cantilevered upper portion can provide total screening to the NSRs. It is estimated that temporary noise barriers of this type can provide full screening of 10 dB(A) to the NSRs. This is considered achievable by careful selection of insulation material, and, if necessary, acoustic mats at noisy mechanical parts of the equipment. Barrier material of surface density of at least 10 14 kg/m² is recommended in order to achieve the necessary screening effect.

Noise Enclosures

3.3.4.10. Full noise enclosures, which completely cover the PME, can provide significant noise reduction up to 20 dB(A). The degree of reduction will vary depending on the nature of the material used for the enclosures. As an conservative approach, a 10 dB(A) noise attenuation is generally applied to fixed plants in this assessment for air compressor and generator.

Good Site Practice

3.3.4.11. The use of good site practice/techniques can provide considerable reductions in noise emissions. Examples of these site practice include:

· use of well-maintained and regularly-serviced plant during the works;

· plant operating on intermittent basis should be turned off or throttled down when not in active use;

· plant that is known to emit noise strongly in one direction should be orientated to face away from the NSRs;

· silencers, mufflers and enclosures for plant should be used where possible and maintained adequately throughout the works;

· where possible fixed plants should be sited away from NSRs; and

· stockpiles of excavated materials and other structures such as site buildings should be used effectively to screen noise from the works.

3.3.5 Assessment of Noise Impacts with the Application of Mitigation Measures

3.3.5.1. Construction noise calculations have been carried out with the incorporation of different noise mitigation measures as discussed in Section 3.3.4, as far as practicable according to the actual construction condition and limitation. Mitigation measures adopted in this assessment include:

· the use of quiet plants for PME (QPME);

· temporary noise barriers for stationary PME, as well as noise jacket and mufflers to cover the noisy part of PME and at the engine exhaust of mobile plants respectively;

· noise enclosures for air compressors and generators; and

· limiting of number of plants operated concurrently.

3.3.5.2. Construction noise levels at the representative NSRs (which are predicted to be the worst affected by the associated construction works) under the mitigated scenario are summarized in Table 3‑13Table 3‑13Table 3‑13Table 3‑13. Detailed calculations of the construction noise impact assessment and complete PME inventory are provided in Appendix 3-M.

Table 3‑13 Predicted Construction Noise Levels at Representative NSRs during Normal Daytime Working Hours under the Mitigated Scenario

NSR ID	Descriptions	Land Use	Limit	Maximum Predicted Construction Levels at each Assessment Year (Leq,30min , dB(A))
				2011	2012	2013	2014	2015
N1	Tsuen Tak Gardens Block A	Residential	75	5858	5959	5757	5454	3434
N2	Tsuen Tak Gardens Block B	Residential	75	5858	5858	5858	5858	4848
N3	Tsuen Tak Gardens Block C	Residential	75	5858	5959	5858	5858	4848
N4	Tsuen Tak Gardens Block D	Residential	75	5858	5858	5959	5959	4948
N5	Tsuen Tak Gardens Block E	Residential	75	5959	6060	5959	5959	4949
N6	Joyful Building Block A	Residential	75	6060	6060	5959	5959	4949
N7	Joyful Building Block B	Residential	75	5959	5959	5858	5858	4949
N8	Sheeny Terrace	Residential	75	6262	6161	5959	5959	5050
N9	Summit Terrace Tower 1	Residential	75	6161	6161	6060	5959	5050
N10	Summit Terrace Tower 2	Residential	75	6565	6565	6464	6363	5453
N11	Summit Terrace Tower 3	Residential	75	6666	6666	6464	6363	5454
N12	Summit Terrace Tower 5	Residential	75	6868	6767	6565	6464	5555
N13	Tsuen Wan Adventist Hospital	Hospital	70	6262	6161	5858	5858	4948
N14	Tsuen Wan Adventist Hospital Staff Quarter	Residential	75	6363	6262	6161	6060	5252
N15	Allway Gardens Block A	Residential	75	6262	6161	6060	5959	5151
N16	Allway Gardens Block B	Residential	75	6161	5959	5757	5757	4848
N17	Allway Gardens Block C	Residential	75	5959	5959	5757	5757	4948
N18^[4]	Wang Fat Ching She	Place of Worship	70	7878	6060	5656	5555	4848
N19	The Panorama	Residential	75	7272	7171	6666	6666	5858
N20	Phase I Belvedere Garden Block 1	Residential	75	6868	6363	6060	6060	5251
N21	Phase I Belvedere Garden Block 2	Residential	75	6767	6161	5959	5959	5050
N22	Phase I Belvedere Garden Block 3	Residential	75	6666	5959	5858	5757	4948
N23	Serenade Cove Block A	Residential	75	6464	6363	6161	6060	5150
N24	Serenade Cove Block B	Residential	75	6363	6363	6161	6161	5252
N25	Serenade Cove Block C	Residential	75	6565	6363	6060	6060	5151
N26	Phase III Belvedere Garden Block 7	Residential	75	5959	3535	3434	3434	3434
N27	Phase III Belvedere Garden Block 6	Residential	75	5959	3535	3434	3434	3434
N28	Phase III Belvedere Garden Block 5	Residential	75	5858	3535	3434	3434	3434
N29	Fu Yung House	Residential	75	5959	6363	6464	6363	5858
N30	Yen Wai Garden	Residential	75	5858	5858	5757	5757	5656
N31	Tak Yan Building Stage 15	Residential	75	5858	5858	5757	5757	5757
N32	On Hong Building	Residential	75	5959	5959	5858	5858	5757
N33	Kan Fat Building	Residential	75	6060	6060	5959	5959	5858
N34	Heung Wo Building	Residential	75	5959	5959	5858	5858	5757
N35	On Fung Building	Residential	75	5959	6161	6262	6262	5959
N36	Wong Siu Ching Secondary School	School	65/70^[2]	6565	6868	6969	6868	6363
N37	Tsuen Wan Plaza Block 1	Residential	75	6262	6262	6161	6161	6161
N38	Tsuen Wan Plaza Block 2	Residential	75	6161	6161	6060	6060	5959
N39	Salvation Army Ng Kok Wai Memorial Kindergarten	School	65/70^[2]	7171	7979	7981	7981	7474
N40	Clague Garden Estate Block A	Residential	75	7070	7575	7575	7575	6868
N41	Clague Garden Estate Block B	Residential	75	6868	7272	7373	7373	6868
N42	Clague Garden Estate Block C	Residential	75	7171	7777	7979	7979	7474
N43	Skyline Plaza	Residential	75	7373	7474	7474	7373	7272
N44	Development at TW5 Cityside Tower 10	Residential	75	[1]				7070
N45	Development at TW5 Cityside Tower 11	Residential	75					6565
N46	Development at TW5 Bayside Tower 1	Residential	75					6262
N47	Development at TW5 Bayside Tower 2	Residential	75					3434
N48	Development at TW5 Bayside Tower 3	Residential	75					6262
N49	Development at TW5 Bayside Tower 4	Residential	75					3434
N50	Development at TW5 Bayside Tower 5	Residential	75					6363
N51	Development at TW5 Bayside Tower 6	Residential	75					6565
N52	Development at TW5 Bayside Tower 7	Residential	75					7171
N53	Development at TW5 Bayside Tower 8	Residential	75					7272
N54	Development at TW5 Bayside Tower 9	Residential	75					7171
N55	Vision City Tower 1	Residential	75	6464	6767	6666	6666	6161
N56	Vision City Tower 2	Residential	75	6060	6060	5959	5959	5959
N57	No. 57 Yeung Uk Road	Residential	75	6363	6666	6464	6363	5757
N58	No. 59-77 Yeung Uk Road	Residential	75	5454	5454	4949	4949	4848
N59^[4]	Tsuen Wan Caritas Clinic	Clinic	70	6161	6565	6363	6161	5454
N60	No. 85-99 Yeung Uk Road	Residential	75	5858	6161	6060	5757	5050
N61	Harmony Garden Block 1	Residential	75	5858	6161	5959	5454	4747
N62	Harmony Garden Block 2	Residential	75	5757	6060	5858	5353	4646
N63	Development at TWTL 394 Tower 1	Residential	75	6565	6969	6767	6666	5959
N64	Development at TWTL 394 Tower 2	Residential	75	6666	6969	6767	6666	5959
N65	Development at TW6 Tower 1	Residential	75	7070	7474	7272	7070	5959
N66	Development at TW6 Tower 2	Residential	75	7171	7474	7272	6868	5959
N67	Development at TW7 Tower 1	Residential	75	[1] [1]	7777	7575	7373	6665
N68	Development at TW7 Tower 2	Residential	75		7676	7575	7575	6867
N69	Development at TW7 Tower 3	Residential	75		7575	7474	7474	6767
N70	Development at TW7 Tower 4	Residential	75		7373	7272	7474	6766
N71	Development at TW7 Tower 5	Residential	75		7373	7373	7474	6767
N72	Development at TW7 Tower 6	Residential	75		7676	7575	7878	7171
N73	Development at TW7 Tower 7	Residential	75		8080	7878	7474	6867
N74	Waterside Plaza Block 2	Residential	75	7676	7777	7676	7575	6362
N75	Waterside Plaza Block 2	Residential	75	7676	7676	7676	7575	6363
N76	Waterside Plaza Block 3	Residential	75	7676	7676	7575	7575	6363
N77	Waterside Plaza Block 4	Residential	75	7373	7474	7373	7373	6262
N78	Proposed School Site at TW7	School	65/70^[2]	7171	7272	7171	7070	6060
N79	Shak Chung Shan Memorial Catholic Primary School	School	65/70^[2]	6767	6969	6868	6767	5757
N80	Riviera Gardens Tower 1	Residential	75	6666	6767	6666	6666	5655
N81	Riviera Gardens Tower 2	Residential	75	6262	6262	6060	6060	3434
N82	Riviera Gardens Tower 3	Residential	75	5959	5959	5858	5858	3434
N83	Riviera Gardens Tower 4	Residential	75	5858	5858	5757	5656	3434
N84	Riviera Gardens Tower 17	Residential	75	5959	5959	5858	5858	3434
N85	Riviera Gardens Tower 18	Residential	75	5959	5959	5858	5858	3434
N86	Riviera Gardens Tower 19	Residential	75	5757	5757	5656	5656	3434
N87	Riviera Gardens Tower 20	Residential	75	6161	6262	6262	6262	5454
N88	Riviera Gardens Tower 21	Residential	75	6363	6565	6464	6363	5555
N89	Riviera Gardens Tower 22	Residential	75	6565	6767	6666	6565	5757
N90	S K H Chu Tan Primary School	School	65/70^[2]	6565	6666	6565	6262	5555
N91	Kwai Shing West Estate Block 6	Residential	75	6363	6565	6464	5959	5151
N92	Kwai Shing West Estate Block 8	Residential	75	6565	6666	6565	6262	5656
N93	Kwai Shing West Estate Block 9	Residential	75	6363	6363	6363	6060	5656
N94	Kwai Shing West Estate Block 10	Residential	75	6363	6262	6262	5959	5555
N95	Lee I Yao Secondary School	School	65/70^[2]	6969	6969	6969	6767	6262
N96	Hibiscus Park Block 1	Residential	75	5656	5555	5555	5353	3434
N97	Hibiscus Park Block 2	Residential	75	5454	5252	3434	3434	3434

Notes:

1. According to the latest programme, residential development at TW5 is anticipated to be completed by Year 2015 to 2016. In addition, residential development at TW6 and TW7 is expected to be completed by Year 2012 the earliest. Therefore, these dwellings are not considered as NSR for construction noise impact before the corresponding year of completion.

2. Construction noise standard for schools is 70 dB(A) at normal school days and is reduced to 65 dB(A) during examination period. The more conservative 65 dB(A) standard is applied in this construction noise impact assessment.

3. Noise levels exceeding the construction noise standards are bold.

4. There are no specific daytime construction noise criteria in EIAO-TM for place of worship (N18 Wang Fat Ching She) and clinic (N59 Tsuen Wan Caritus Clinic)

3.3.5.3. In view of the results listed on Table 3‑13Table 3‑13Table 3‑13Table 3‑13, it can be noted that the predicted construction noise levels with noise mitigation measures at the majority of the representative NSRs shall comply with the corresponding construction noise limits. Slight exceedance in predicted construction noise levels would occur at the following NSRs at different stages of the construction work:

· N18 - Wang Fat Ching She (no specific daytime construction noise criteria in EIAO-TM)

· N36 - Wong Siu Ching Secondary School (during examination period only)

· N39 - Salvation Army Ng Kok Wai Memorial Kindergarten (during both normal and examination periods)

· N42 - Clague Garden Estate Block C

· N67 – Development at TW7 Tower 1

· N68 – Development at TW7 Tower 2

· N72 – Development at TW7 Tower 6

· N73 - Development at TW7 Tower 7

· N74 - Waterside Plaza Block 1

· N75 – Waterside Plaza Block 2

· N76 – Waterside Plaza Block 3

· N78 - Proposed School Site at TW7 (during examination period only)

· N79 - Shak Chung Shan Memorial Catholic Primary School (during examination period only)

· N90 - S K H Chu Tan Primary School (during examination period only)

· N95 - Lee I Yao Secondary School (during examination period only)

3.3.5.4. Discussion of residual impacts is presented in Section 3.3.6.

3.3.6 Residual Impact

3.3.6.1. In view of the results listed on Table 3‑13Table 3‑13Table 3‑13Table 3‑13, it can be noted that the predicted construction noise level with noise mitigation measures at the majority of the representative NSRs shall comply with the corresponding construction noise limits. Slight exceedance of predicted construction noise level would occur at some of the NSRs at different stages of the construction work. The list of subjected NSRs and their residual construction noise impacts are summarized in Table 3‑14Table 3‑14Table 3‑14Table 3‑14.

Table 3‑14 Residual Construction Noise Impact after Application of Noise Mitigation Measures

NSR ID	Descriptions	Predicted Construction Levels under Unmitigated Scenario, dB(A)	Predicted Construction Levels under Mitigated Scenario, dB(A)	Predicted Construction Noise due to the Project ONLY under Mitigated Scenario, dB(A)	Period of Exceedance (Overall Noise Level)	Period of Exceedance (due to this Project only)	Construction Noise Criteria, dB(A)
N18	Wang Fat Ching She	62-79	47-78	46-60	June 2011 to December 2011	Nil	70^[5]
N36^[3]	Wong Siu Ching Secondary School	72-81	59-69	58-68	July 2012 to July 2014	September 2012 to February 2014	65 / 70 ^[2]
N39	Salvation Army Ng Kok Wai Memorial Kindergarten	73-9473-94	71-7971-81	70-7970-81	June 2011 to April 2015June 2011 to April 2015	June 2011 to April 2015June 2011 to April 2015	65 / 70 ^[2]65 / 70 ^[2]
N42	Clague Garden Estate Block C	73-88	69-79	45-79	September 2012 to July 2014	September 2012 to April 2014	75
N67	Development at TW7 Tower 1	79-89	64-77	64-77	January 2012 to September 2012	January 2012 to September 2012	75
N68	Development at TW7 Tower 2	79-89	66-76	66-76	January 2012 to September 2012	January February 2012 to September 2012	75
N72	Development at TW7 Tower 6	82-90	69-78	69-78	December 2012; January 2014 to May July 2014	December 2012; January 2014 to May July 2014	75
N73^[1]	Development at TW7 Tower 7	80-92	65-80	65-80	January 2012 to May 2013	January 2012 to May 2013	75
N74	Waterside Plaza Block 1	76-90	60-77	60-72	June 2011 to March 2013	Nil	75
N75	Waterside Plaza Block 2	76-90	61-76	61-71	June 2011 to March 2013	Nil	75
N76	Waterside Plaza Block 3	76-89	61-76	61-70	June 2011 to April 2012; December 2012	Nil	75
N78^[1]	Proposed School Site at TW7	73-85	56-721	56-69	June 2011 to December 2014	January 2012 to March 2014	65 / 70 ^[2]
N79^[4]	Shak Chung Shan Memorial Catholic Primary School	69-82	54-69	54-67	June 2011 to August July 2014	April 2012 to March 2013	65 / 70 ^[2]
N90^[3]	SKH Chu Tan Primary School	65-78	6552-66	52-66	June 2012 to September 2012	June 2012 to September 2012	65 / 70 ^[2]
N95^[4]	Lee I Yao Secondary School	75-82	62-69	62-69	June 2011 to July 2014	June 2011 to January 2013; March 2013 to July 2014	65 / 70 ^[2]

Notes:

1. Planned development

2. Assessment criteria of 70 dB(A) for normal days and 65 dB(A) during examinations

3. Under “Noise Abatement Programme in Schools” Stage IV, refer to Section 3.2.2

4. Double-glazed window and window type air-conditioners noted on site visit

5. There are no specific daytime construction noise criteria in EIAO-TM for place of worship (N18 Wang Fat Ching She)

3.3.6.2. There are 15 NSRs with predicted construction noise level exceeding the corresponding construction noise criteria under the mitigated scenario, while 5 of them (N67, N68, N72, N73 and N78) are planned developments.

3.3.6.3. For other NSRs (N18, N36, N39, N42, N74, N75, N76, N79, N90 and N95), it is recommended that more detailed construction work programme should be considered before actual construction work is undertaken by the contractor, and applicable noise mitigation measures should be implemented according to the actual site condition and constraints, in order to minimize the potential construction noise impact. In particular, special arrangement on PME operations should be determined during school examination period.

3.3.6.4. In addition, a detailed work programme according to the environmental monitoring and audit manual should be provided by the Environmental Team (ET) of the Contractor, and to be approved by Independent Environmental Checker (IEC) before actual implementation.

3.3.7 Environmental Monitoring and Audit

3.3.7.1. Environmental monitoring and audit measures are recommended during the construction phase of the Project. Schedule and extent of the monitoring programme is presented in the stand-alone Environmental Monitoring and Audit (EM&A) Manual. A proactive EM&A programme is necessary to be provided by the contractor, in order to ensure that construction noise impact to the NSRs should be minimized as far as practicable. An appropriate path for noise complaints handling procedures is a key element of the EM&A programme. Detailed implementation schedules of all mitigation measures are also provided in the EM&A Manual.

3.3.8 Conclusions

3.3.8.1. Practical mitigation measures such as the use of QPME employed in the works, temporary noise barriers, noise jackets, mufflers, noise enclosures and limiting the number of plants operated concurrently, are proposed to minimize construction noise impact.

3.3.8.2. Further mitigation including good site practices as mentioned in Section 3.3.4, as well as proper scheduling to avoid noisy construction during school examinations, can be adopted to further minimize the construction noise impact.

3.3.8.3. Environmental monitoring and audit should be implemented to ensure the application of necessary noise mitigation measures, construction noise monitoring, as well as to establish an appropriate path for noise complaints handling. EM&A Manual will be prepared in separate with this report.