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Ngong Shuen Chau Viaduct: Baseline Monitoring Report

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Ngong Shuen Chau Viaduct: Baseline Monitoring Report BASELINE MONITORING REPORT Highways Department Route 9 Between Tsing Yi and Cheung Sha Wan - Ngong Shuen Chau Viaduct: Baseline Monitoring Report June 2002 Environmental Resources Management 21/F Lincoln House 979 King’s Road Taikoo Place Island East, Hong Kong Telephone: (852) 2271 3000 Facsimile: (852) 2723 5660 E-mail: [email protected] http: //www.erm.com TABLE OF CONTENTS EXECUTIVE SUMMARY 1. INTRODUCTION .......................................................................................................... 1 1.1 Purpose of the Report ....................................................................................................1 1.2 Background....................................................................................................................1 1.3 Structure of the Baseline Monitoring Report.................................................................2 2. AIR QUALITY............................................................................................................... 3 2.1 Monitoring Requirements..............................................................................................3 2.2 Monitoring Equipment ..................................................................................................3 2.3 Monitoring Parameters, Frequency and Duration..........................................................3 2.4 Monitoring Locations ....................................................................................................4 2.5 Monitoring Methodology and QA/QC Procedure .........................................................4 2.6 Results And Observations .............................................................................................6 2.7 Action and Limit Levels ................................................................................................7 3. NOISE.............................................................................................................................. 8 3.1 Monitoring Requirements..............................................................................................8 3.2 Monitoring Equipment..................................................................................................8 3.3 Monitoring Parameters, Frequency and Duration..........................................................8 3.4 Monitoring Locations ....................................................................................................9 3.5 Monitoring Procedures..................................................................................................9 3.6 Results And Observations ...........................................................................................10 3.7 Action And Limit Levels .............................................................................................12 4. CONCLUSIONS........................................................................................................... 13 LIST OF FIGURES Figure 1a Proposed Air and Noise Monitoring Locations and Weather Stations Figure 1b Setup of Air Quality (TSP) and Noise Equipment at Mei Foo Sun Chuen Figure 1c Setup of Air Quality (TSP) and Noise Equipment at Stonecutters Island Figure 1d Setup of Weather Station Figure 2 24hr TSP Concentration at Mei Foo Sun Chuen (ASR1) over the Baseline Period Figure 3 24hr TSP Concentration at Stonecutters Island (ASR2) over the Baseline Period Figure 4 1hr TSP Concentration at Mei Foo Sun Chuen (ASR1) over the Baseline Period Figure 5 1hr TSP Concentration at Stonecutters Island (ASR2) over the Baseline Period Figure 6 Average Day Time Baseline Noise Level (on Weekdays) at Mei Foo Sun Chuen (NSR1) Figure 7 Average Evening Time and Sunday Day Time Baseline Noise Levels at Mei Foo Sun Chuen (NSR1) Figure 8 Average Night Time Baseline Noise Level at Mei Foo Sun Chuen (NSR1) Figure 9 Average Day Time Baseline Noise Level at Stonecutters Island (NSR2) Figure 10 Average Evening Time and Sunday Day Time Baseline Noise Levels at Stonecutters Island (NSR2) Figure 11 Average Night Time Baseline Noise Level at Stonecutters Island (NSR2) LIST OF APPENDICES Appendix A1 Calibration Certificates for the HVS Appendix A2 Calibration Certificates for the Sound Level Meter and Sound Level Calibrator Appendix A3 Calibration Certificates for the High Volume Orifice Calibrator Appendix A4 Calibration Certificate for the Weather Station Appendix B1 Monitoring Data of 24hr TSP at Mei Foo Sun Chuen Appendix B2 Monitoring Data of 24hr TSP at Stonecutters Island Appendix B3 Monitoring Data of 1hr TSP at Mei Foo Sun Chuen Appendix B4 Monitoring Data of 1hr TSP at Stonecutters Island Appendix B5 Laboratory Results Appendix C1 Baseline Noise Monitoring Data – Mei Foo Sun Chuen (NSR1) Appendix C2 Baseline Noise Monitoring Data – Stonecutters Island (NSR2) Appendix D Weather Conditions at Baseline Monitoring Locations EXECUTIVE SUMMARY This environmental baseline report has been prepared by the ERM-Hong Kong Ltd. for “HY/2000/21 - Route 9 Ngong Shuen Chau Viaduct Contract”. This report presents the baseline noise and air monitoring works undertaken in June 2002. The baseline 24-hour and 1-hour Total Suspended Particulates (TSP) and noise monitoring were conducted in accordance with the Environmental Permit No. EP-085/2000/A and EM&A Manual at two designated locations at Mei Foo Sun Chuen and Stonecutters Island from 1 to 19 June 2002. For Mei Foo Sun Chuen, access to roof top of the residential blocks and the school (which are the sensitive receivers as identified in the EIA Report) was being rejected by the property management. The monitoring location is therefore moved to the roof of a toilet block at Lai Chi Kok Park, which is considered a better location to reflect baseline situation as it is located closer to Ngong Shuen Chau Viaduct worksite and avoid measuring construction noise generated from Site 6 and Site 10 construction. For Stonecutters Island, the Security Bureau has rejected our access request to Stonecutters Military Base to carry out baseline monitoring. An alternative location at the DSD Pumping Station close to Stonecutters Military Base was therefore chosen for the purpose of carrying out the baseline monitoring. Baseline TSP and noise monitoring were not carried out at Site 6, Site 10 and CDA Site as Site 6 and 10 were currently under construction and the CDA Site was not yet occupied. However, the ambient air quality and noise conditions would be reviewed upon completion of Site 6, Site 10 and West Rail construction works which might significantly alter the background conditions. A repeat of the baseline monitoring, if the situation warrants, would be carried out at the above locations to obtain updated baseline levels. Both 24-hour and 1-hour TSP monitoring were completed at the two locations for 14 consecutive days, between 1 - 14 June 2002. The average 24-hour and 1-hour TSP levels at all locations were in the range of 32 to 168 µg/m3 and 34 to 222 µg/m3 respectively. The baseline noise level monitoring was conducted between 1 - 19 of June 2002, except monitoring on 6 (mid-night), 9 and 11 June 2002 which were rescheduled due to rain. At Mei Foo Sun Chuen, the electricity supply to the noise monitoring equipment was suspended from 9:00 am on 3 June 2002 to 10:30 am on 4 June 2002, therefore results were not available during these time periods. The baseline noise level for the two locations was measured continuously for 24 hours during the monitoring period. During day-time period, the mean noise levels Leq(30 minutes) at all locations were in the range of 71-75 dB(A). During the evening time & holidays and the night- time periods, the mean noise levels Leq(5 minutes) at all locations were in the range of 65–72 dB(A) and 62-68 dB(A) respectively. The results were steady throughout the baseline monitoring period. A weather station has been setup at the Chief Resident Engineer (CRE) temporary accommodation located at West Kowloon Reclamation near Stonecutters Island to measure the temperature, barometer pressure, wind speed and wind direction. Data collected was reviewed and analyzed to establish the Action and Limit Levels for dust during impact/compliance monitoring throughout the construction and operation of the project. Details of the methodology, locations and results are presented in this report. Route 9 – Ngong Shuen Chau Viaduct Highways Department Baseline Monitoring Report 1. INTRODUCTION ERM-Hong Kong Limited was appointed by the Highways Department to undertake the role of the Environmental Team Leader for the “Route 9 between Tsing Yi and Cheung Sha Wan – Ngong Shuen Chau Viaduct” to carry out baseline and impact monitoring for the project. Prior to the commencement of the construction activities, baseline monitoring of air and noise levels in accordance with the Environmental Permit (No. EP-085/2000/A) and the Environmental Monitoring and Audit Manual for the captioned works was required. ERM has also undertaken the baseline noise and air environmental monitoring in June 2002. 1.1 Purpose of the Report The purpose of this report is to set out baseline levels for air quality and noise. These baseline levels will be used as the basis for environmental impact and compliance monitoring during construction. This report presents the monitoring locations, equipment, period, methodology, results and observations of the air and noise measurements undertaken during the baseline period. 1.2 Background Ove Arup and Partners Hong Kong Ltd (Arup) has been awarded the Design and Construction Consultancy
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