Appendix E Noise and Vibration

Transcription

1 Blossom Street Appendix E Noise and Vibration Replacement Environmental Statement Volume III

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3 Blossom Street Appendix E1 Noise Modelling Methodology Environmental Statement Volume III

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5 Noise Modelling Methodology Modeling Methodology 1 NOISE MODELLING SOFTWARE CadnaA 1 is a noise modelling software package that predicts noise levels based on the relevant input data e.g. location and orientation of equipment and sound power data. The software can take into account a variety of information about the site including topography, buildings, and demolition/construction noise sources Noise Modelling Assumptions The following assumptions have been made when producing the noise model: The ground conditions around the site are mainly roads and buildings therefore the ground has been modelled as semi soft; Air temperature was assumed to be 10 C and humidity 70%; It is assumed that all building façades are smooth facades and therefore given an absorption coefficient of 0.21; and One order of reflection was modelled. 2 AMBIENT NOISE PREDICTIONS Ambient noise levels at the proposed site have been predicted using the CRTN prediction method and road traffic data provided by Arup. The noise models have taken account of source terms, traffic flows and composition, vehicle speeds, topography and other propagation factors. The propagation of noise from road traffic (the dominant source of noise) across the Proposed Development has been predicted using CadnaA noise modelling software which utilises the CRTN calculation methodology. Road traffic data from the 2017 Full Occupation scenario (presented in Table of Chapter 10: Noise and Vibration) provided by Arup was used to populate the noise model with road traffic noise sources. Noise levels for train movements were based upon measured noise data at Position LT1. Each train line was assigned a value of 60 db LA25m during the day and 57 db L A25m during the night. These values produced a predicted LAeq,16h value of 79 db during the day and an LAeq,8h value of 78 db at measurement location LT1. 3 CONSTRUCTION NOISE PREDICTIONS CadnaA noise mapping software was used to predict construction noise levels at the selected receptors. The construction noise model followed the procedures for prediction of construction noise set out in BS :2009+A1:2014. Sound power levels for each of the following construction and demolition activities have been calculated: Demolition Substructure Super-structure Envelope, Roof, Shell and Core Fit out and External Works Construction activities taking place during each timeslice are summarised in Table 1. According to the construction phasing programme the scenarios presented in Table 1 correspond with significant construction activities occurring onsite. Figures showing the location of construction and demolition works during each timeslice can be seen in Chapter 5: Demolition and Construction. Table 1: Construction activities for each timeslice Month Construction Activity S2 demolition S3 demolition S1 Substructure (inc. S1a, b, c) S1 Substructure (inc. S1a, b, c) S2 Substructure S3 Substructure S1 Frame S1 Envelope S1c Frame S1c Envelope S1a Frame S1a Envelope S1b Frame S1 Envelope S1 Fit out S1c Fit out S1b Envelope S1b Fit out S1a Fit out S2 Frame S2 Envelope S3 Frame S3 Envelope A list of plant was provided in Chapter 5: Demolition and Construction. This list of plant and corresponding sound power data (after BS 5228) have been used to derive the total sound power output level for each construction activity. Noise source data for relevant plant is presented in Table 2. A full list of plant associated with each demolition and construction phase is presented in Tables 3-7. The total sound power levels applied to area sources within the construction noise model for these activities have been summarised in Table 8. 1 CadnaA, registered trademark of Datakustik GmbH (Munich, Germany). (

6 Modeling Methodology Modeling Methodology Table 2: Relevant plant with corresponding sound power data BS 5228 reference Plant Sound Power Level, L w db(a) BS5228-1: Table C.1, Item 3 Concrete Crusher 108 BS5228-1: Table C.2, Item Excavators 107 BS5228-1: Table D.7, Item 6 Compressor & Air Tools 105 BS5228-1: Table C.4, Item 48 Tower Cranes 104 BS5228-1: Table C.3, Item 28 Mobile Cranes 95 BS5228-1: Table C.3, Item 14 Piling Rigs 111 BS5228-1: Table C.3, Item 26 Concrete Pumps 103 BS5228-1: Table C.4, Item 57 Wall-climber Platforms 95 BS5228-1: Table C.4, Item 61 Goods/ Passenger Hoists 96 BS5228-1: Table C.4, Item 90 Mechanical road sweeper 104 BS5228-1: Table C.8, Item 20 Tipper Lorry 107 BS5228-1: Table C.4, Item 22 Ready Mixed Concrete Lorry 104 N/A Climbing Screens Not considered significant N/A Pavement Gantries Not considered significant BS5228-1: Table C.9, Item 8 Low Loader 114 BS5228-1: Table C.2, Item 33 Articulated Lorry 109 BS5228-1: Table C.2, Item 33 Large Rigid Lorry 109 Table 3: Demolition Demolition Sound Power Level (db) Time 'on' Number of plant Corrected for number of plant Corrected for time 'on' L w db(a) Concrete Crusher Excavators Compressor & Air Tools Mobile Cranes Mechanical road sweeper Tipper Lorry Low Loader Articulated Lorry Large Rigid Lorry Total 117 Table 4: Substructure Substructure Sound Time Number of Corrected for Corrected for Power 'on' plant number of plant time 'on' Level (db) L w db(a) 360 Excavators Compressor & Air Tools Tower Cranes Mobile Cranes Piling Rigs Concrete Pumps Mechanical road sweeper Tipper Lorry Ready Mixed Concrete Lorry Low Loader Articulated Lorry Large Rigid Lorry Total 117 Table 5: Super-structure Super-structure Sound Time Number of Corrected for Corrected for Power 'on' plant number of plant time 'on' Level (db) L w db(a) Compressor & Air Tools Tower Cranes Mobile Cranes Concrete Pumps Wall-climber Platforms Goods/ Passenger Hoists Mechanical road sweeper Tipper Lorry Ready Mixed Concrete Lorry Low Loader Articulated Lorry Large Rigid Lorry Table 6: Envelope, Roof, Shell and Core Sound Envelope, Roof, Time Power Shell and Core 'on' Level (db) Total 115 Number of plant Corrected for number of plant Corrected for time 'on' L w db(a) Tower Cranes Mobile Cranes Wall-climber Platforms Goods/ Passenger Hoists Mechanical road sweeper Tipper Lorry Articulated Lorry Large Rigid Lorry Total 111

7 Modeling Methodology Table 7: Fit out and External Works Sound Fit out and Time Power External Works 'on' Level (db) Number of plant Corrected for number of plant Corrected for time 'on' L w db(a) 360 Excavators Mobile Cranes Goods/ Passenger Hoists Mechanical road sweeper Tipper Lorry Ready Mixed Concrete Lorry Low Loader Articulated Lorry Large Rigid Lorry Table 8: Demolition and Construction Noise Summary Phase Total L W db(a) Demolition 116 Substructure 116 Super-structure 115 Envelope, Roof, Shell and Core 111 Fit out and External Works 114 Total 114

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9 Blossom Street Appendix E2 Baseline Noise and Vibration Survey Environmental Statement Volume III

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11 1 INTRODUCTION Baseline Noise and Vibration Survey Continuous noise and vibration monitoring has been carried out at a number of locations around the Proposed Development site to determine baseline levels during daytime and night time periods. The purpose of the surveys was to provide source noise and vibration data for modelling of road traffic noise, railway noise, and vibration from trains and underground tube lines, to predict the levels from which suitable façade design requirements can be derived. 2 NOISE SURVEYS A series of noise surveys were carried out on site comprising both unattended and attended noise measurements. Unattended noise monitoring was carried out from 28 th March 2014 to 10 th April 2014 at the Blossom Street site located along Blossom Street, Shoreditch, London E1 6BX. The purpose of the survey was to collect baseline noise data prior to the re-development of the site. Unattended noise monitoring was undertaken with Rion NL-52 Type 1 sound level meters utilizing a Rion NC-74 Type 1 field calibrator. The calibration levels were checked before and after measurements and no significant calibration drift was detected. The sound level meters log environmental noise measurement parameters including average ambient (LAeq), maximum (LAmax) and background (LA90) noise levels. In addition to the long term noise monitoring, attended noise measurements were also undertaken around the site on 3 rd and 27 th June 2014 to validate unattended monitoring, identify railway/traffic specific noise levels and obtain an indication of existing internal levels at selected buildings whose façade is to be retained. Attended noise monitoring was undertaken with a combination of Norsonic 140 and Svantec 958 Type 1 sound level meters utilising a B&K Type 4231 Type 1 field calibrator. All noise measurements were undertaken in accordance with best practice as specified in BS : Long Term Noise Monitoring Monitoring Locations Baseline Noise/Vibration Survey Details of the four long-term noise monitoring locations within the Blossom Street site are described below: LT1, located along Commercial Street, alongside the train line to Liverpool Street Station at approximately 2.5 metres above ground and approximately 4m from Kerbside, overlooking the train line to Liverpool street station; LT2, located on the roof of Ashurst offices, on Elder Street 1 metre from the façade overlooking Elder Street; LT3, located on the corner of Blossom Street and Fleur De Lis Street approximately 2.2 metres above ground level approximately, 1.5 metres from the kerbside; and LT4, located on the third floor of empty office block above Norton Folgate 1 metre from the façade overlooking Norton Folgate. Figure 1 presents the noise monitoring locations at the Blossom Street site. Figure 1: Unattended Noise Monitoring Locations LT1 2.1 Noise Sources The noise environment at the Blossom Street site is influenced by several sources including: LT3 Monitoring location Railway traffic to and from Liverpool Street Station; Road traffic from Shoredich High Street, Norton Folgate, Elder Street, Commercial Street, Blossom Street and Fleur De Lis Street and the surrounding road network; LT4 LT2 Aircraft flyover noise; and Mechanical service plant on nearby buildings. It should be noted that the dominant noise source for the site was road traffic, along with railway traffic to the North and East of the site.

12 Baseline Noise/Vibration Survey Baseline Noise/Vibration Survey Long Term Noise Monitoring Results A summary of long-term noise measurements LT1, LT2, LT3 and LT4 is presented in Tables 1 to 9. Full measured noise data for all unattended monitoring locations are graphically presented in Figures 2, 3, 4 and 5. Average LAeq,T noise levels have been calculated by logarithmically averaging logged hourly values. A (-3 db) facade correction needs to be applied to levels measured at LT1, LT2 and LT4 to attain free-field values, which are used in site suitability assessments. TABLE 3: LT2 BASELINE DAYTIME NOISE SURVEY RESULTS FREE FIELD (RESIDENTIAL) Daytime (07:00 23:00) L Aeq,16hr (db) L A10,16hr (db) L A90,16hr (db) L Amax,16hr (db) 6-April April April April TABLE 1: LT1 BASELINE DAYTIME NOISE SURVEY RESULTS FREE FIELD (OFFICE) Daytime (09:00 17:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 4-April Arpil April April April April TABLE 2: LT1 BASELINE NIGHT-TIME NOISE SURVEY RESULTS FREE FIELD Night-time (23:00-07:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 4-April Arpil April April April April TABLE 3: LT2 BASELINE DAYTIME NOISE SURVEY RESULTS FREE FIELD (RESIDENTIAL) Daytime (07:00 23:00) L Aeq,16hr (db) L A10,16hr (db) L A90,16hr (db) L Amax,16hr (db) TABLE 4: LT2 BASELINE NIGHT-TIME NOISE SURVEY RESULTS FREE FIELD Night-time (23:00-07:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 4-April Arpil April April April April TABLE 5: LT3 BASELINE DAYTIME NOISE SURVEY RESULTS FREE FIELD (OFFICE) Daytime (09:00 17:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 28-Mar Mar Mar Mar April April April April Arpil

13 Baseline Noise/Vibration Survey Baseline Noise/Vibration Survey TABLE 6: LT3 BASELINE DAYTIME NOISE SURVEY RESULTS FREE FIELD (RESIDENTIAL) Daytime (07:00 23:00) L Aeq,16hr (db) L A10,16hr (db) L A90,16hr (db) L Amax,16hr (db) 28-Mar Mar Mar Mar April April April TABLE 9: LT4 BASELINE NIGHT-TIME NOISE SURVEY RESULTS FREE FIELD Night-time (23:00-07:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 28-Mar Mar Mar Mar April April April TABLE 7: LT3 BASELINE NIGHT-TIME NOISE SURVEY RESULTS FREE FIELD Night-time (23:00-07:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 28-Mar Mar Mar Mar April April April TABLE 8: LT4 BASELINE DAYTIME NOISE SURVEY RESULTS FREE FIELD (OFFICE) Daytime (09:00 17:00) L Aeq,8hr (db) L A10,8hr (db) L A90,8hr (db) L Amax,8hr (db) 28-Mar Mar Mar Mar April April April

14 Figure 2: Long term LT1 monitoring results Baseline Noise/Vibration Survey Figure 3: Long term LT2 monitoring results

15 Figure 4: Long term LT3 monitoring results Baseline Noise/Vibration Survey Baseline Noise/Vibration Survey Figure 5: Long term LT4 monitoring results

16 2.3 Short Term Attended Noise Monitoring A summary of short-term attended noise measurements is presented in Tables Baseline Noise/Vibration Survey Locations of all measurement positions around the site are shown below in Figure 6. Figure 6: Attended noise measurement locations TABLE 10: BASELINE ATTENDED NOISE SURVEY RESULTS (3-JUNE-14) Measurement Position (MP) St Time Measurement Duration HH:MM L Aeq (db) L A10 (db) L A90 (db) L Amax (db) MP6 MP7a MP7b MP9 a/b MP8 a/b MP3 MP10 a/b MP1a MP1 MP2 Monitoring location MP6 MP7a MP7b Corner of Shoreditch High St and Fleur De Lis Site border with railway (north) existing building facade Site border with railway (north) - fence 12:20 00: :44 00: :00 00: :06 00: MP5 MP4 TABLE 10: BASELINE ATTENDED NOISE SURVEY RESULTS (3-JUNE-14) Measurement Position (MP) MP1 MP1a MP2 MP3 MP4 MP5 Corner of Commercial St and Elder St Corner of Commercial St and Quaker St Corner of Commercial St and Fleur De Lis Corner of Fleur De Lis and Blossom St Corner of Folgate St and Blossom St Corner of Folgate St and Shoreditch High Time Measurement Duration HH:MM L Aeq (db) L A10 (db) L A90 (db) L Amax (db) 13:13 00: :07 00: :00 00: :51 00: :25 00: :04 00: :12 00: TABLE 11: BASELINE ATTENDED INTERNAL NOISE SURVEY RESULTS (27-JUNE-14) MP8a MP9a MP10a Measurement Position (MP) Inside 1887 Warehouse 1st floor (facing east) Inside 1927 warehouse 2nd floor (facing west) Inside 161 Commercial Street (facing north) Time Measurement Duration HH:MM L Aeq (db) L A90 (db) L Amax (db) 09:57 00: :08 00: :11 00: Comments Trains, some traffic Trains, some traffic No trains, some traffic 10:33 00: No train noise 10:36 00: With train noise 10:54 00: * :58 00: :02 00: * Measurement not typical of internal ambient noise level as this was affected by siren noise. Traffic, trains, sirens Traffic and train noise Traffic and train noise TABLE 12: BASELINE ATTENDED EXTERNAL NOISE SURVEY RESULTS (27-JUNE-14) * MP8b MP9b Measurement Position (MP) Outside 1887 Warehouse Outside 1927 warehouse Time Measurement Duration HH:MM L Aeq (db) L A90 (db) L Amax (db) 10:15 03: Comments No train noise, some traffic 10:19 02: Train/traffic noise 10:21 02: Train noise 10:24 02: : :38 01: No train/some traffic Train noise

17 Baseline Noise/Vibration Survey Baseline Noise/Vibration Survey TABLE 12: BASELINE ATTENDED EXTERNAL NOISE SURVEY RESULTS (27-JUNE-14) * MP10b Measurement Position (MP) Outside 161 Commercial Street Time Measurement Duration HH:MM L Aeq (db) L A90 (db) L Amax (db) Comments 10:39 01: No train noise 11:04 02: :07 03: Traffic/some train noise * All external noise measurements were carried out on ground floor level below assessed façade window ASELINE NIGHT-TIME NOISE SURVEY RESULTS (LT8) FREE FIELD 3 VIBRATION SURVEY Vibration monitoring was carried out between 28 th March 2014 and 14 th April 2014 at the Blossom Street site. The purpose of the survey was to collect baseline vibration measurements prior to the re-development. An additional short term measurement session was carried out on 27 th June 2014 to assess potential vibration impact of underground trains (LUL Central line) which runs through the middle of the site. Vibration monitoring was undertaken using a Svantek 958 sound and vibration level meter, a Rion VE10 vibration calibrator and a B&K 4231 Field Calibrator. The calibration levels were checked before and after each measurement and no significant calibration shift was detected. The Sound level meter logs environmental noise measurement parameters. The Vibration level meter logs VDV, P-P, Peak and RMS. 3.1 Vibration Sources The Vibration environment at the Blossom Street site is influenced by several sources including: Railway traffic to and from Liverpool Street Station Railway traffic from the Central Line Road traffic on Commercial Street. It should be noted that the dominant vibration sources were underground railway traffic from the central line, which runs through the middle of the site, and railway traffic from Liverpool Street Station to the North and East of the site. 3.2 Vibration Monitoring Locations Details of the two long term vibration measurements and the three short term vibration measurements are described below: VL1, located along Northern boundary of site two, south of the rail line to Liverpool Street Station. VL2, located in the car park of Ashurst offices on Elder Street, in the South east corner of the courtyard, and above the central line. STV1, short term attended vibration measurements taken in the car park of Ashurst offices. Multiple measurements (10 minute samples) taken around the site. Basement, short term attended vibration and noise measurement taken in the basement on site one, adjacent to the central line. Multiple measurements (10 minute samples) taken on location. Elder Street basement, short term (1 hour sample) attended vibration measurement taken in the basement of an office (8 Elder Street). Figure 7 presents the vibration monitoring locations at the Blossom Street Site.

18 Baseline Noise/Vibration Survey Baseline Noise/Vibration Survey Figure 7: Vibration Monitoring Locations TABLE 13: VL1 BASELINE DAYTIME VIBRATION SURVEY RESULTS Channel 1 (VDV Day-time (07:00-23:00) Channel 2 (VDV Channel 3 (VDV 2-April VL1 3-April STV2 VL2/STV1 STV3 Monitoring location TABLE 14: VL1 BASELINE NIGHT TIME VIBRATION SURVEY RESULTS Channel 1 (VDV Night-time (23:00-07:00) Channel 2 (VDV Channel 3 (VDV 28-Mar Mar Mar Mar April April April TABLE 15: VL2 BASELINE DAYTIME VIBRATION SURVEY RESULTS 3.3 Vibration Monitoring Results A summary of the vibration results from monitoring locations VL1, VL2, STV1, Basement and Elder St Basement is presented in tables Day and night time VDV values have been calculated for VL1 and VL2. To calculate the day and night time values, measured values were powered to 4, then the 16h/8h periods were summed and powered to ¼. The attended measurements were similarly calculated. TABLE 13: VL1 BASELINE DAYTIME VIBRATION SURVEY RESULTS Channel 1 (VDV Day-time (07:00-23:00) Channel 2 (VDV Channel 3 (VDV 28-Mar Mar Mar Mar April Channel 1 (VDV Day-time (07:00-23:00) Channel 2 (VDV Channel 3 (VDV 10-April April April April TABLE 16: VL2 BASELINE NIGHT TIME VIBRATION SURVEY RESULTS Channel 1 (VDV Night-time (23:00-07:00) Channel 2 (VDV Channel 3 (VDV 10-April April April April

19 Baseline Noise/Vibration Survey TABLE 17: STV1 BASELINE VIBRATION SURVEY RESULTS Measurement number Channel 1 (VDV Channel 2 (VDV Channel 3 (VDV TABLE 18: STV2 (BASEMENT) VIBRATION SURVEY RESULTS Measurement number Channel 1 (VDV Channel 2 (VDV Channel 3 (VDV TABLE 19: STV3 (ELDER ST BASEMENT) VIBRATION SURVEY RESULTS Measurement number Channel 1 (VDV Channel 2 (VDV Channel 3 (VDV

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21 Blossom Street Appendix E3 Noise Contours Environmental Statement Volume III

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23 PPG 24 noise contours - Daytime Noise Predictions

24 PPG 24 noise contours - Night-time Noise Predictions

25 Blossom Street Appendix E4 Noise Predicted (max) building facade levels Environmental Statement Volume III

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27 Predicted (max) building facade levels Predicted (max) building facade levels Predicted (max) building facade levels, 8h day - Office Predicted (max) building facade levels, 16h day Residential

28 Predicted (max) building facade levels, 8h night Residential Predicted (max) building facade levels