Foothills Bypass, Tuen Mun Roadlwong Chu Road Interchange
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L: f.1iJilV Territory Development IJ Department, Hong Kong ~ Foothills Bypass, Tuen Mun RoadlWong Chu Road n Interchange and Other Road Junction n Improvement Works o Agreement No. CE 44/95 n o o o [I ( [J Final Environmental Impact :u Assessment IU o January 1997 o Scott Wilson Kirkpatrick u CONSULTINO I!NGINEI!RS ----------- Aspinwall Clouston U ERM (Hong Kong) Parsons Brinckerhoff (Asia) iJ SWKAtria .' L FINAL REPORT [I n'--_.! Territory Development Department o Foothills Bypass and Other Road n Junction Improvement Works: Final o Environmental Impact Assessment [J 6 January 1997 o Reference C1507 / 49768 [1 [I [J For and on behalf of ERM-Hong Kong, Ltd [1 Approved by: .-//. ~?~- d ~ Position: ~ ~ o Date: /, Jq In r1 This report has been prepared by ERM-Hong Kong, Ltd, with all L reasonable skill, care and diligence within the terms of the Contract with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by u agreement with the client. We disclaim any responsibility to the client and other in respect of any matters outside the scope of the above. This report is confidential to the client and we accept no u responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known. Any such party relies u upon the report at their own risk. L r CONTENTS: [ 1 INTRODUCTION 1 1.1 PREAMBLE 1 [ 1.2 SruDyAREA 1 1.3 OBJECTIVES OF THE ENVIRONMENTALIMPACT ASSESSMENT 2 1.4 STRUCTURE OF THE REpORT 3 [ 2 PROJECT DESCRIPTION 5 [ 2.1 ROUTE ALIGNMENT 5 2.2 CONSTRUCTION PHASE 5 [ 2.3 OPERATIONAL PHASE 6 3 LAND USE 9 [ 3.1 INTRODUCTION 9 3.2 EXISTING CONDITIONS 9 [ 3.3 POTENTIAL IMPACTS 11 3.4 MITIGATION MEASURES 12 3.5 CONCLUSIONS 12 [ 4 AIR QUALITY 13 [ 4.1 INTRODUCTION 13 4.2 GOVERNMENT LEGISLATION AND STANDARDS 13 4.3 BASELINE CONDITIONS 14 [ 4.4 AIR SENSITIVE RECEIVERS 16 4.5 CONSTRUCTION PHASE 17 [ 4.6 OPERATIONAL PHASE 24 5 NOISE IMPACT 29 [ 5.1 INTRODUCTION 29 5.2 GOVERNMENTAL LEGISLATION AND STANDARDS 29 [ 5.3 NOISE SENSITIVE RECEIVERS 32 5.4 BASELINE CONDITIONS 34 5.5 CONSTRUCTION PHASE 34 [ 5.6 OPERATION PHASE 48 l 6 WATER QUALITY 57 6.1 INTRODUCTION 57 6.2 ENVIRONMENTAL LEGISLATION AND STANDARDS 57 l 6.3 BASELINE CONDITIONS 57 6.4 CONSTRUCTION PHASE 58 r' 6.5 OPERATIONAL PHASE 62 ,~ ]' 1 '----. [J .. L 7 ECOLOGY 65 [ 7.1 INTRODUCTION 65 7.2 GOVERNMENT LEGISLATION 65 7.3 BASELINE CONDITIONS 66 [ 7.4 CONSTRUCTION PHASE 70 7.5 OPERATIONAL PHASE 73 [ 8 SOLID WASTE MANAGEMENT 75 [ 8.1 INTRODUCTION 75 8.2 SENSITIVE RECEIVERS AND BASELINE CONDITIONS 75 8.3 ASSESSMENT CRITERIA AND METHODOLOGY 75 [ 8.4 CONSTRUCTION WASTE IMPACTS 77 8.5 MITIGATION MEASURES 81 8.6 EM&A REQUIREMENTS 85 c 8.7 CONCLUSION 85 9 ENVIRONMENTAL MONITORING AND AUDIT 87 [ 9.1 INTRODUCTION 87 [ 9.2 OBJECTIVES OF THE ENVIRONMENTAL MONITORING AND AUDIT PROGRAMME 87 9.3 THE EM&A MANUAL 88 9.4 MEASURES FOR MITIGATION 88 [ 9.5 ENVIRONMENTAL MONITORING AND AUDIT 88 9.6 ENQUIRIES, COMPLAINTS AND REQUESTS FOR INFORMATION 89 9.7 REpORTING 90 [ 10 CONCLUSIONS AND RECOMMENDATIONS 91 [ 10.1 INTRODUCTION 91 10.2 CONCLUSIONS 91 10.3 RECOMMENDATIONS FOR ENVIRONMENTAL MONITORING AND AUDIT 93 [ Annex A Calculation of TSP Emission Rate and Samples of Air Modelling Input and Output Files (FDM& CALINE4) [ Annex B Hong Kong Government Legislation and Guideline relating to Ecology Annex C List of Plant Species Recorded During Field Surveys [ L [ ,[ r / [ 1 INTRODUCTION [ 1.1 PREAMBLE In April 1996, the Territory Development Department (TDD) commissioned Scott [ Wilson Kirkpatrick (SWK), in association with ERM-Hong Kong, Ltd (ERM), Aspinwall Clouston, SWK Atria and Parsons Brinckerhoff to undertake the design and construction of a bypass along the foothills of Castle Peak (Foothills [ Bypass), and improvements to Tuen Mun Road (Road P1)/Wong Chu Road (Road P3) interchange and Dll/D13/D14/44A road junction (Agreement No [ CE44/95). The Project forms part of the Tuen Mun Area 38 development. The proposed development of Area 38 includes the River Trade Terminal (RTT) and Area 38 c Special Industrial Area (SIA), which are scheduled for completion in 1999 and 2002 respectively. [ The Foothills Bypass and associated road works which are scheduled to be completed by the end of 2001, are being implemented to overcome anticipated traffic problems within Tuen Mun, due to the proposed developments of the RTT [ and SIA. The Bypass is primarily required to provide an alternative route for traffic, thereby diverting traffic away from various residential areas in Tuen Mun and in particular, to mitigate the environmental impact on Lung Mun Road. The [ road improvement works will provide the additional traffic capacity necessary to service the proposed SIA and RTT developments. [ ERM is responsible for the Environmental Impact Assessment (EIA) as part of the Foothills Bypass Study. The purpose of the EIA is to identify and evaluate the potential impacts on the surrounding environment arising from the [ construction and operation of the Bypass and improvement works in relation to servicing Area 38, and to examine and evaluate mitigation measures on environmental, engineering and cost effectiveness grounds, and recommend an [ optimum package for implementation. SWK and ERM have worked on a number of projects within the Study Area. The [ most recent of these projects is the Reclamation and Servicing ofTuen Mun Area 38 for Special Industries - Improvement to Roads and Junctions within Tuen Mun Environmental Impact Assessment (Road Improvement EIA). The Road Improvement EIA was commissioned by the Highways Department in 1995, to assess the r potential environmental impacts associated with the improvement to roads and junctions within Tuen Mun in relation to the Area 38 Study. A noise mitigation [ package comprising noise enclosures, barriers, cantilever barriers and low noise road surfacing was recommended to benefit residents in the vicinity of Wong Chu Road. The results and recommendations of the Road Improvement EIA [ have been presented to Tuen Mun District Board in February 1996 and endorsed by the Advisory Council on Environment (ACE) in May 1~96. L 1.2 STUDYAREA The Foothills Bypass EIA covers the same Study Area as the Road Improvement EIA L and therefore, those works previously assessed and endorsed under the Road Improvement EIA will not be revisited. Works that were not assessed under the L ERM-HONG KONG, LTD TERRITORY DEVELOPMENT OEPARTMEl'o'T 1 r \ L Road Improvement EIA include the Junction at Wu Shan and Wu King Roads, the road works associated with the widening of Wong Chu Road Bridge over the [i Tuen Mun Nullah and the southernmost section of the alignment. Consequently, the Foothills Bypass EIA will focus on that part of the Study Area [ which was not assessed by the Road Improvement EIA and any new and/ or changed engineering design details (Le., the Wong Chu Road Bridge works). Please refer to Figure 1.2a, which identifies that section of the Foothills Bypass [ Study Area which was already assessed and endorsed in the Road Improvement EIA as well as the current Foothills Bypass EIA Study Area. [ 1.3 OBJECTIVES OF THE ENVIRONMENTAL IMPACT ASSESSMENT [ The objective of the ErA is to identify and evaluate the potential impacts on the surrounding environment arising from the construction and operation of the Bypass and improvement works in relation to servicing Area 38, and to examine [ and evaluate mitigation measures on environmental, engineering and cost effectiveness grounds, and recommend an optimum package for implementation. The ErA consolidates all the environmental assessment [ findings, including comments from Government covering all the important environmental issues. The ErA also includes the general requirements of the Environmental Monitoring and Audit (EM&A) Study which will be necessary to [ ensure the implementation and effectiveness of the adopted environmental protection and pollution control measures. Specific EM&A requirements are discussed in the EM&A Manual. [ Specific objectives of the ErA are as follows: [ (a) to describe the proposed Project and associated works together with the requirements for carrying out the proposed Project; . [ (b) to identify and describe the elements of the community and environment likely to be affected by the proposed Project; [ (c) to identify and quantify emission sources and determine the significance of impacts on sensitive receivers and potential affected uses; [ (d) to identify and quantify any potential losses or damage to flora, fauna and natural habitats; [ (e) to propose the provision of mitigation measures so as to minimize pollution, environmental disturbance and nuisance during construction and operation of the Project; (f) to identify, predict and evaluate the residual (Le., after practicable mitigation) environmental impacts and cumulative effects expected to arise during the construction and operational phases of the Project in [ relation to the sensitive receivers and potential affected uses; (g) to identify, assess and specify methods, measures and standards, to be [ included in the detailed design, construction and operation of the Project which are necessary to mitigate these impacts and reduce them to acceptable levels; L l ERM-HONG KONG, LTD TERRITORY DEVELO~E;-.rr DEPARTMENT 2 --, ,---. ---, ;---, '--, ~ r~: [ , '-,L ___ I __) :. 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