Preliminary Environmental Information Report: Volume III. Noise and Vibration Technical Appendix

Transcription

1 Preliminary Environmental Information Report: Volume III Appendix 9A Noise and Vibration Technical Appendix

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3 The Ferrybridge D Gas Fired Generating Station Order Land within and adjacent to the Ferrybridge Power Station, Stranglands Lane, Knottingley Appendix 9A: Noise Technical Appendix Applicant: SSE Generation Ltd Date:

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5 DOCUMENT HISTORY Author Signed Mike Hewett Date Approved By Signed Richard Lowe Date Document Owner AECOM

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7 CONTENTS Appendix 9A: Noise and Vibration Technical Appendix Sound Perception and Terminology Noise Survey Instrumentation Meteorological Conditions Baseline Survey Results Construction Noise Assessment: Assumed Plant Operational Noise Assessment: Assumed Plant Table A1.1: Sound Levels for Common Situations... 1 Table A2.1: Instrument Calibration... 3 Table A3.1: Meteorological conditions ML Table A3.2: Meteorological Conditions ML Table A4.1: Noise Monitoring Results at ML Table A4.2: Noise Monitoring Results at ML Table A4.3: Noise Monitoring Results at ML Table A4.4: Noise Monitoring Results at ML Table A4.5: Noise Monitoring Results at ML Table A5.1 Assumed Plant Piling and Foundation Works Table A5.2 Assumed Plant Building & General Site Activity Table A5.3 Assumed Plant Fit Out Table A5.4 Assumed Plant Landscaping Table A5.5 Assumed Plant Cofferdam Construction Table A5.6 Assumed Plant Pipeline Top Soil Strip Table A5.7 Assumed Plant Pipe Stringing, Bending and Welding Table A5.8 Assumed Plant Construction of Above Ground Installation (AGI) Table A6.1 Assumed Plant CCGT Site Table A6.2 Assumed Plant OCGT... 19

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9 Appendix 9A: Noise and Vibration Technical Appendix 1. Sound Perception and Terminology Between the quietest audible sound and the loudest tolerable sound there is a million to one ratio in sound pressure (measured in Pascals, Pa). Because of this wide range, a sound level scale based on logarithms is used in sound measurement called the decibel (db) scale. Audibility of sound covers a range of approximately 0 to 140 db. The human ear system does not respond uniformly to sound across the detectable frequency range and consequently instrumentation used to measure sound is weighted to represent the performance of the ear. This is known as the A weighting and annotated as db L A. Table A1.1 lists the sound pressure level in db L A for common situations. Table A1.1: Sound Levels for Common Situations Typical Sound Level, db(a) Example 0 Threshold of hearing 30 Rural area at night, still air 40 Public library, refrigerator humming at 2m 50 Quiet office, no machinery 60 Normal conversation 70 Telephone ringing at 2m 80 General factory sound level 90 Heavy goods vehicle from pavement 100 Pneumatic Drill at 5m 120 Discotheque 1m in front of loud speaker 140 Threshold of pain The sound level at a measurement point is rarely steady, even in rural areas, and varies over a range dependent upon the effects of local sound sources. Close to a busy motorway, the sound level may vary over a range of 5 db L A, whereas in a suburban area this variation may be up to 40 db L A and 1

10 more due to the multitude of sound sources in such areas (cars, dogs, aircraft etc.) and their variable operation. Furthermore, the range of night-time sound levels will often be smaller and the levels significantly reduced compared to daytime levels. When considering environmental sound, it is necessary to consider how to quantify the existing sound (the ambient sound) to account for these second to second variations. Background Noise Levels A parameter that is widely accepted as reflecting human perception of the ambient noise is the background noise level, L 90, this is usually A weighted and can be denoted as L A90 (db). This is the noise level exceeded for 90 % of the measurement period and generally reflects the noise level in the lulls between individual noise events. Over a one hour period, the L A90 will be the noise level exceeded for 54 minutes. Ambient or Activity Noise Levels The equivalent continuous A-weighted sound pressure level, L Aeq is the single number that represents the total sound energy measured over that period. L Aeq is the sound level of a notionally steady sound having the same energy as a fluctuating sound over a specified measurement period. It is commonly used to express the energy level from individual sources that vary in level over their operational cycle. Noise Changes Human subjects are generally only capable of noticing changes in noise levels greater than 3 db. It is generally accepted that a change of 10 db in an overall, steady noise level is perceived to the human ear as a doubling (or halving) of loudness. (These findings do not necessarily apply to transient or non-steady noise sources such as changes in noise due to changes in road traffic flow, or intermittent noise sources).

11 2. Noise Survey Instrumentation Information relating to the measurement equipment during the survey is presented in Table A2.1 below. Table A2.1: Instrument Calibration Instrument Manufacture Model Serial Number ML1 Class 1 Sound Level Meter ML2 Class 1 Sound Level Meter ML3 Class 1 Sound Level Meter ML4 Class 1 Sound Level Meter ML5 Class 1 Sound Level Meter Rion NL Rion NL B&K B&K Norsonic Nor Calibrator 1 B&K Weather Station ML1 & ML3 Vaisala WXT520 H During calibration no significant deviation (greater than 0.4dB) from the reference value was noted. Full calibration details are available upon request.

12 3. Meteorological Conditions ML1 - Oakland Hill Estate A weather station was used to monitor weather conditions between Tuesday 31 st January and Saturday 11 th. Wind direction, Wind Speeds (average and Max) and Ambient Rain over the daytime and night-time periods have been recorded in the table below. Table A2.1: Meteorological conditions ML1 Date Tuesday 31st January Time Period Wind Direction (Average) Degrees from North Wind Speed (Average) m/s Wind Speed (Max) m/s 12:00 23: :00 07: Ambient Rain Gauge mm Wednesday 1st Thursday 2nd 07:00 23: :00 07: :00 23: :00 07: Friday 3rd 07:00 23: :00 07: Saturday 4th 07:00 23: :00 07: Sunday Monday Tuesday 5th 6th 7th 07:00 23: :00 07: :00 23: :00 07: :00 23: :00 07: Wednesday 8th Thursday 9th Friday 10th Saturday 11th 07:00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 18: Meteorological conditions were generally within the limits specified in the relevant standards for acceptable noise measurements. However, there were a few exceptions with Max wind speeds exceeding the recommended 5 m/s, although upon review of the collected noise data these elevated wind speeds have not significantly affected the noise measurements

13 ML2 Kirkhaw Lane The survey was unattended and no weather station was in place at the time, therefore it is not possible to comment upon specific meteorological conditions throughout the entire survey period. Upon arrival on-site the weather conditions were noted to be dry with intermittent cloud; an easterly wind with an average speed of 2.6 m/s and the road surfaces were noted to be dry. Upon collection of the equipment the weather conditions were noted to be intermittent cloud; a southerly wind with an average speed of 1 m/s; and dry road surfaces. It is understood that weather conditions did not vary greatly throughout the survey period, although wind speeds may have exceeded 5m/s on Tuesday 12 th April during the evening period. Upon review of the baseline data collected within this period no significant changes were observed therefore data collected during this period has been included for use within the assessment ML3 - Hall Court, Brotherton At ML3 a weather station was used to monitor weather conditions between 2 nd and 7 th December. Wind direction speeds (average and Max) and ambient rain over the daytime and night-time periods have been recorded in Table 4 below. Table A3.2: Meteorological Conditions ML3 Date Time Period Wind Direction (Average) Degrees from North Wind Speed (Average) m/s Wind Speed (Max) m/s Ambient Rain Gauge mm Saturday December Sunday December Monday December Tuesday December 2 nd 3 rd 4 th 5 th 12:00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: Wednesday 6 th December 07:00 23: :00 07: Thursday December 07:00 10: th At ML3 max wind speeds did at times exceed the recommended 5 m/s. However, upon reflection of the collected data adverse weather conditions do not appear to have had a significant effect upon the collected data. It should be noted that an average wind speed of 4m/s was not exceeded during any 15-minute interval during the measurement period. ML4 Fryston Lane Farm The survey was unattended and no weather station was in place at the time, therefore it is not possible to comment upon specific meteorological conditions throughout the entire survey period. However, upon review of publically available meteorological data it was seen that it was generally

14 dry through the survey period with rain only on the final day (25 th May). Wind speeds were seen to be generally within the limit of 5 m/s with the exception of between 06:00 and 18:00 on the 22 nd May when wind speeds may have exceeded the prescribed limit. ML5 Strangland Lane The survey was unattended and no weather station was in place at the time, therefore it is not possible to comment upon specific meteorological conditions local to the measurement position throughout the entire survey period. Upon arrival on-site the weather conditions were noted to be dry with broken cloud coverage; a westerly wind with an average speed of 0.3 m/s and the road surfaces were noted to be dry. Upon collection of the equipment the weather conditions were noted to be dry with clear skies; a north westerly wind with an average speed of 0.3m/s; and dry road surfaces. Upon review of publically available meteorological data for the wider area, it was seen that it was generally dry through the survey period with patches of light rain (less than 0.5mm precipitation) occurring throughout each day. It is understood that weather conditions did not vary greatly throughout the survey period Wind speeds were seen to be generally within the limit of 5 m/s with the exception of between 15:00 and 17:00 on the 4 th October when wind speeds may have exceeded the prescribed limit. Upon review of the baseline data collected within this period no significant changes were observed therefore data collected during this period has been included for use within the assessment.

15 4. Baseline Survey Results The processed results from each monitoring location are provided in Table A4.1 to Table A4.54. The L AF90 values presented represent the lowest percentile of all measurements within the time period. For ML1 and ML3 data were logged 15-minute contiguous intervals, for ML2 measurements were taken in contiguous 1-hour intervals. Table A4.1: Noise Monitoring Results at ML1 Date Time Period (T) L Aeq, T db Tuesday 31 st January 12:00 23:00* 23:00 07:00 Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Wednesday 1 st Thursday 2 nd Friday Saturday 4 th 3 rd Sunday 5 th Monday 6 th Tuesday 7 th Wednesday 8 th 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:00 07:00 23:00 23:00 07:

16 Date Time Period (T) L Aeq, T db Thursday 9 th 07:00 23:00 23:00 07:00 Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Friday Saturday 11 th Sunday 12 th Monday 13 th Tuesday 14 th 07:00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 11:00* * Note this period does not cover the full 16-hr day period and therefore may not be directly comparable with other complete time periods. Table A4.2: Noise Monitoring Results at ML2 Date Time Period (T) L Aeq, T db Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Monday April Tuesday 11 th April Wednesday 12 th April 15:00 23:00* :00 07: :00 23: :00 07: :00 23: :00 07:

17 Date Time Period (T) L Aeq, T db Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Thursday 13 th April 07:00 11:00* * Note this period does not cover the full 16-hr day period and therefore may not be directly comparable with other complete time periods. Table A4.3: Noise Monitoring Results at ML3 Date Time Period (T) L Aeq, T db Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Saturday 2 nd December Sunday December 3 rd Monday 4 th December Tuesday 5 th December Wednesday 6 th December Thursday 7 th December 12:00 23:00* :00 07: :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 10:00* * Note this period does not cover the full 16-hr day period and therefore may not be directly comparable with other complete time periods.

18 Table A4.4: Noise Monitoring Results at ML4 Date Time Period (T) L Aeq, T db Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Friday May th Saturday 5 th May 2018 Sunday May th Monday 7 th May 2018 Tuesday 8 th May 2018 Monday 21 st May 2018 Tuesday 22 nd May 2018 Wednesday 23 rd May 2018 Thursday 24 th May :30 23:00* :00 07: :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00-17:00* :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: :00 23: :00 07: Friday May :00 15:30* 25 th * Note this period does not cover the full 16-hr day period and therefore may not be directly comparable with other complete time periods.

19 Table A4.5: Noise Monitoring Results at ML5 Date Time Period (T) L Aeq, T db Typical Highest L Amax, T db Highest L A10, 1hr db Lowest L A90, 1hr db Wednesday 3 rd October 2018 Thursday 4 th October :00 23:00* :00 07: :00 23: :00 07: Friday October th 07:00 11:30* * Note this period does not cover the full 16-hr day period and therefore may not be directly comparable with other complete time periods.

20 5. Construction Noise Assessment: Assumed Plant Table A5.1 Assumed Plant Piling and Foundation Works Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Compressors 6 80 Dump Truck (tipping fill) 2 79 Dump Truck (pass-by) 3 87 Lorry (delivery and collection) Pre-Cast Concrete Piling Hydraulic Hammer Rig 4 89 Hand-Held Welder (welding piles) 1 73 Generator for Welding 1 73 Tracked Excavator 5 71 Concrete Mixer Truck Truck Mounted Concrete Pump and Boom Arm 3 80 Wheeled Mobile Telescopic Crane 4 78 Tower Crane 2 77 Diesel Generator for Site Cabins 4 66 Diesel Generator for Site Lighting 2 65 Road Sweeper 1 68 Angle Grinder 1 80 Electric Water Pump 2 68

21 Table A5.2 Assumed Plant Building & General Site Activity Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Compressors 6 80 Wheeled Loader Lorry (delivery and collection) Water Pump (20 kw) Dumper (idling) Wheeled Backhoe Loader Tracked Excavator Concrete Mixer Truck Truck Mounted Concrete Pump and Boom Arm Poker Vibrator Wheeled Mobile Telescopic Crane Tower Crane Fork Lift Truck Electric Core Drill (Drilling Concrete) Concrete Floor Cutter Diesel Generator for Site Cabins Diesel Generator for Site Lighting Road Sweeper Angle Grinder Road Planer (road construction) Vibratory Compactor (asphalt) Asphalt Paver + Tipper Lorry Electric Water Pump

22 Table A5.3 Assumed Plant Fit Out Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Compressors 6 80 Lorry (delivery and collection) Wheeled Mobile Telescopic Crane 4 78 Tower Crane 2 77 Lorry with Lifting Boom 1 77 Lifting Platform 1 67 Fork Lift Truck 1 75 Mini Tracked Excavator 1 74 Electric Core Drill (Drilling Concrete) 1 85 Concrete Floor Cutter 1 91 Hand-Held Circular Saw (Cutting Paving Slabs) 1 84 Diesel Generator for Site Cabins 4 66 Diesel Generator for Site Lighting 2 65 Road Sweeper 1 68 Angle Grinder 1 80 Hand-Held Cordless Nail Gun 1 73 Electric Water Pump 2 68 Table A5.4 Assumed Plant Landscaping Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Roller 2 73 Diesel Generator for Site Cabins 1 66 Diesel Generator for Site Lighting 1 65 Road Sweeper 1 68

23 Table A6.5 Assumed Plant Cofferdam Construction Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Mobile telescopic crane (55t) T dumper (hydrema back tipper) 2 76 Piling rig - excavator (35-40t) 1 81 Piling rig - piling driver 1 59 Flat bed vehicle with HIAB (max of 4 one way trips per day - 10mph) 1 83 Boat with piling rig on board (motor noise) 1 75 Rig power pack 1 68 Table A5.6 Assumed Plant Pipeline Top Soil Strip Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) 30T Backhoe 3 80 CAT D CAT D CAT D Table A5.7 Assumed Plant Pipe Stringing, Bending and Welding Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Crane 40T 1 70 Pipe Carrier D8 Cradle 8 80 Tele - Handler 1 71 Sideboom T Backhoe 1 71 Weldsets (3 Bedford) 6 73 Dumpers T Backhoe 2 77 Cutting Equipment (Bedford) 1 65

24 Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Welding Rigs 2 80 Welding Rigs 4 80 Welding Rigs (backend) 8 80 generator for welding 1 57 angle grinder 1 80

25 Table A5.8 Assumed Plant Construction of Above Ground Installation (AGI) Plant Type Quantity in Operation Sound Pressure Level of single unit at 10m (dba) Tractor (Cat 583 or equivalent) with sideboom 2 80 Purpose-made welding rig, lorry mounted 3 80 Tracked Crane 50t 1 75 Lorry ordinary up to 18t 2 83 Small Tools T Backhoe 2 77 CAT D Dumper 2 77 JCB 3cx 2 69 Stone Roller 2 79 generator for welding 1 57 angle grinder 1 80 Tractor (Cat 583 or equivalent) with sideboom 2 80

26 6. Operational Noise Assessment: Assumed Plant Table A6.1 Assumed Plant CCGT Site Building / Associated Area Noise Source Quantity in Operation Provided Sound Power Level of single unit (dba) Air vent. openings 2 86 Steam Turbine Hall Facades 2 88 Rest of Steam Turbine Building 2 94 Steam Pipes 10UMY/Start-up 2 94 Steam Turbine Hall Auxiliaries Transformers/Option 10UBx/Static excitation transformer 2 72 LCM Opening 10LCM/Start-up 2 90 Electrics (PCC) PCCs 10UBAxx 2 94 Air vent. openings 2 85 Gas Turbine Hall Facades 2 71 Rest of Gas Turbine Building 2 93 Gas Turbine Hall Filter House Openings 2 90 Rest of Gas Turbine Filter House 2 85 Air ventilation openings 2 84 Gas Turbine Generator Hall Facades 2 76 Gas Turbine Diffuser Extension Duct 10UMX/Indoor 2 88 Boiler / Stack Generator Transformer Buildings HRSG Enclosure / Start-up HRSG Stack 11UHx 2 93 Transformers CT variant 2 97 Feed Water Pump Bldg Cooling Water Pumps 2 89 Transformers/Start-up 11UBy 2 82 Outside LBH Flash Tank and Blow-up Opening 10LBH/Start-up 2 90 Unidentified Noise Sources 2 85 Common / Outside Fuel Gas Reducing Station/Outdoor 2 98 Rest of Common 2 93 Natural Draft Cooling Towers Air Inlet 3 112

27 Building / Associated Area Noise Source Quantity in Operation Provided Sound Power Level of single unit (dba) Air Outlet Table A6.2 Assumed Plant OCGT Building / Associated Area Noise Source Quantity in Operation Provided Sound Power Level of single unit (dba) Gas Turbine Air Inlet Housing Inlet Filter Face 1 99 Inlet Duct 1 88 Accessory Module GT Enclosure Gas Turbine Building Inlet Plenum GT Exhaust Diffuser Compartment Generator Enclosure Gas Turbine Building Turbine Compartment vent fans 1 98 Exhaust Compartment vent fans 1 98 Fin Fan Coolers Fin Fan Coolers 1 99 Exhaust Stack Generator Transformer / BOP Exhaust Elbow Stack Top Step-Up Transformer 1 98 Gas Station 1 95