PROPOSED CO-OPERATIVE CONVENIENCE STORE AT MARINER PH, MORTIMER ROAD, SOUTH SHIELDS NOISE IMPACT ASSESSMENT On behalf of: The Co-operative Group
May 2016 PROPOSED CO-OPERATIVE CONVENIENCE STORE AT MARINER PH, MORTIMER ROAD, SOUTH SHIELDS NOISE IMPACT ASSESSMENT Report prepared by: Hepworth Acoustics Ltd 21 Little Peter Street Manchester M15 4PS On behalf of: The Co-operative Group Report prepared by: David Sproston BSc MIOA Principal Consultant Report checked by: Paul Bassett BSc MSc FIOA Technical Director
CONTENTS 1.0 INTRODUCTION 1 2.0 SITE DESCRIPTION AND PROPOSALS 3 3.0 NOISE SURVEY 5 4.0 NOISE IMPACT ASSESSMENT 7 5.0 RECOMMENDATIONS 13 6.0 CONCULSION 15 FIGURE 1: SITE LOCATION AND NOISE MEASUREMENT LOCATIONS 16 FIGURE 2: PROPOSED SITE LAYOUT AND NOISE BARRIER 17 APPENDIX I: NOISE UNITS & INDICES 18 APPENDIX II: NOISE SURVEY RESULTS 20
1.0 INTRODUCTION 1.1 Hepworth Acoustics Limited was commissioned by The Co-operative Group to carry out a noise impact assessment in connection with a proposed change of use of the Mariner Public House at Mortimer Road, South Shields to a Co-operative Convenience Store. 1.2 We understand that the site benefits from a Permitted Development right for a change of use from A4 (public house) to A1 (retail). However, the proposals include the construction a new single storey extension at the rear of the existing building to provide additional internal ground floor storage space and the installation of new plant, and therefore a full planning application for the proposed change of use is required to be submitted to South Tyneside Council. 1.3 In their pre-planning application response and with respect to noise, South Tyneside Council have stated that; a) Plant noise rated in accordance with BS 4142:2014 should be 0dB above background noise level; b) Suggested deliveries would only be permitted between 07:30-19:00 Monday- Saturday, and not on Sundays or Bank Holidays. 1.4 The Council have not stated what opening times would be acceptable under Permitted Development rights. 1.5 We understand that deliveries will be required 7 days a week in order to keep the store sufficiently stocked (e.g. perishable goods, daily newspapers). The current proposals are for opening hours between 07:00-23:00 daily, with delivery hours proposed as follows: a) early morning newspaper delivery between 06:00 and 07:00hrs daily, by a small van. b) daytime deliveries (bread, and main deliveries) between 07:00 and 20:00hrs daily. 1.6 The noise assessment has therefore included: Measuring existing noise levels at locations representative of the nearest dwellings to the proposed development on a Sunday morning, evening and night; Evaluating the potential noise impact of the development; Recommending noise mitigation measures where necessary/feasible. Tel: 0161 242 7900 Page 1 of 22
1.7 The various noise units and indices referred to in this report are described in Appendix I. All noise levels mentioned in the text have been rounded to the nearest decibel, as fractions of decibels are imperceptible. Tel: 0161 242 7900 Page 2 of 22
2.0 SITE DESCRIPTION AND PROPOSALS Existing site 2.1 The Mariner PH currently occupies the site at the corner of Mortimer Road and Cauldwell Avenue, South Tyneside, South Shields, Tyne and Wear. The site location is shown in Figure 1. 2.2 The site benefits from on-site car parking accessible from Mortimer Road that runs along the southeastern site boundary. Cauldwell Avenue runs along the north-western boundary. 2.3 Residential properties are located close to both the north east (dwellings on Warwick Road and Cauldwell Avenue), south east (219 Mortimer Road) site boundaries. Other dwellings are located on the opposite sides of Mortimer Road and Cauldwell Avenue. 2.4 Timber fencing of up to 2.0m high is present on the north-east and south-eastern boundaries that separate the site and rear gardens of the adjacent dwellings, and only provides minimal acoustic screening properties due to some fencing being perforate and/or poorly maintained. Proposed Development 2.5 The proposed layout is shown in Figure 2. 2.6 The proposals are for a change of use to Class A1 to use as Convenience Store. The number of car parking spaces will be reduced from 20 to 16 spaces. 2.7 The proposed operating hours and proposed delivery times are as detailed in Section 1. Overall, the number of deliveries to the store per day will be low. 2.8 Caged goods from rigid body HGV s will generally be unloaded from delivery vehicles using a tail lift at the rear of the car park. The wheeled cages would then be moved into the store via a short ramp and the covered external yard area to the rear. 2.9 Newspapers would be delivered to the site by a large van. Only 1 delivery by a rigid body HGV would take place at a time, and to manage servicing the Co-operative uses software called Paragon which enables deliveries to be programmed to ensure this. Tel: 0161 242 7900 Page 3 of 22
2.10 The proposals show a 2.4m high timber fence around the yard area at the rear and will encircle most of the rear of the building, and also to the northern and eastern site boundaries so as to provide significant screening of noise from the site outside dwellings adjacent to the site boundary. Building services plant are anticipated to operate intermittently throughout the daytime, with some plant operating at night. Drawings provided show that some of the rear yard will be covered by a canopy although the precise construction of the canopy has yet to be determined. Tel: 0161 242 7900 Page 4 of 22
3.0 NOISE SURVEY 3.1 An attended noise survey has been carried out in order to establish the existing noise climate at dwellings closest to the site. Noise measurements were carried out in 15 minute periods at all measurement locations and were measured on a Sunday morning (06:03-09:25), evening (19:06-23:07) and night (00:59-02:23). These are representative of the potential worst-case periods for noise impact from the development. 3.2 Noise levels were planned to be measured at 3 on-site locations representative of the nearest dwellings to the development. However, due to problems with access, the evening and night time surveys were carried out at offsite locations that still remained representative of the nearest dwellings as far as practicable. As such a total of 7 noise measurement locations are reported. The measurement locations are shown in Figure 1, and grouped as follows. Location 1 [1/1A] is representative of No. 219 Mortimer Road Location 2, [2, 2A and 2B] is representative of the rear of dwellings on Warwick Road that back onto the site; Location 3 [3 and 3A] is representative of No s 1 and 8 Cauldwell Avenue. 3.3 The noise surveys were carried out using a Brüel and Kjær 2260 Type 1 sound level meter. Calibration checks were carried out both before and after the measurement periods using an acoustic calibrator itself independently calibrated within the previous 12 months. No variance in the calibrated noise levels was observed. The noise measurements were taken in free-field conditions and at a microphone height of approximately 1.5m above local ground level. Full details of the dates, times, equipment used and prevailing weather conditions during the noise surveys are shown in Appendix II. 3.4 The results of the noise surveys are summarised in Table 1 and the full results are shown in Appendix II. Tel: 0161 242 7900 Page 5 of 22
Table 1: Summary of Measured Noise Levels Measured Noise Levels (db) Location Period LAmax LAeq LA90 Morning 74-83 52-61 41-44 1 Evening 78-82 60-65 40-46 Night 78 54 38-39 Morning 65-68 46-51 39-41 2 3 Evening 68-70 46-53 39-42 Night 75.8 (emergency siren) 53 40 Morning 66-72 50-54 41-43 Evening 71-76 52-59 39-43 Night 65-66 47 40-41 3.5 The dominant noise source, including transient peaks in noise, at all locations was road traffic on Mortimer Road and Cauldwell Avenue. The number of vehicles passing the noise measurement location were noted, and show that traffic flow was are low in the early morning, with the number of vehicles increasing significantly around 09:00. Evening traffic flow was high in the evening, and as can be expected, very low at night. 3.6 Distant road traffic was audible in lulls of local road traffic. Some very low level industrial noise and faint occasional noise of boiler exhaust at nearby dwellings were audible at times as noted in Appendix II. 3.7 Noise levels at Locations 1 and 3 are the highest due to the proximity of Mortimer Road and Cauldwell Avenue to the dwellings. Noise levels at Location 2 are generally lower due to distance attenuation and/or screening provided by nearby dwellings. 3.8 Background (db L A90) noise levels are lowest at night as can be expected, and those measured in the middle of the night were comparable to those measured in the last hour of the night (06:00-07:00hrs). Tel: 0161 242 7900 Page 6 of 22
4.0 NOISE IMPACT ASSESSMENT 4.1 This assessment considers 3 separate aspects of potential noise impact from the development: building services plant, and un/loading of delivery vehicles (servicing noise). Building Services Plant 4.2 South Tyneside Council have advised that noise from new building services plant at the neatest dwellings (as rated in accordance with BS 4142:2014) should not exceed the background noise level. 4.3 British Standard 4142:2014, Method for rating and assessing industrial and commercial sound describes methods for rating and assessing sound of an industrial nature including fixed installations which compromise mechanical and electrical plant and equipment. 4.4 BS 4142:2014 requires the rating sound level (L Ar,Tr) for the operation to be compared with the background sound level (L A90) in the absence of the operational noise. 4.5 The rating level (L Ar,Tr) is derived based on the specific (L Aeq,Tr) sound level attributable to the operation, corrected for residual sound if necessary, and a character correction added for any sound sources where certain acoustic features can increase the significance of impact. BS 4142:2014 Corrections for noise characteristics are summarised in Table 2. Table 2: Summary of BS 4142:2014 Character Corrections Noise Correction (db) Character Tonality Impulsivity Intermittency Other Audibility Not tonal Just audible Clearly perceptible Highly perceptible Correction 0 +2 +4 +6 Audibility Not impulsive Just audible Clearly perceptible Highly perceptible Correction 0 +3 +6 +9 Audibility Not Intermittent Readily distinguishable against residual acoustic environment Correction 0 +3 Audibility N/A Readily distinguishable against residual acoustic environment Correction 0 +3 Tel: 0161 242 7900 Page 7 of 22
4.6 The character/feature corrections shown in Table 2 are additive, and therefore, significant corrections can be applicable in worst case situations. 4.7 An initial estimate of the impact of the operation is determined by subtracting the background level from the rating level. BS 4142:2014 states that: Typically, the greater this difference, the greater the magnitude of the impact A difference of around +10dB or more is likely to be an indication of a significant adverse impact, depending on the context. A difference of around +5dB is likely to be an indication of an adverse impact, depending on the context. The lower the rating level is relative to the measured background level, the less likely it is that the operation will have an adverse impact or a significant adverse impact. Where the rating level does not exceed the background sound level, this is an indication of the specific sound source having a low impact, depending on the context. 4.8 South Tyneside Council have advised that the rating level for the new plant should be controlled so as not to exceed the background noise level and is considered a reasonable approach in of controlling future noise impact of the new plant. 4.9 Full details of the building services plant are not available at this stage of development of the proposals. Therefore, the measured noise levels have been used to determine cumulative plant noise design limits for the daytime (07:00-23:00) and night-time (23:00-07:00) periods, and are shown in Table 3. Tel: 0161 242 7900 Page 8 of 22
Table 3: Recommended Cumulative Building Services Plant Noise Limits Recommended Cumulative Location Period Plant Noise Limit Dwellings on Mortimer Road (Location 1) Daytime Night 40dB LAr,1hr 38dB LAr,15mins Rear of Dwellings on Warwick Road (Location 2) Dwellings on Cauldwell Avenue (Location 3) Daytime Night Daytime Night 40dB LAr,1hr 40dB LAr,15mins 40dB LAr,1hr 40dB LAeq,15mins 4.10 Building services plant will be carefully selected and their operating times managed to ensure that cumulative building services plant noise is controlled. 4.11 When considering the proposed fence to the plant/yard area, all plant items, especially those that would operate at night, should be installed as close to the ground as possible and be well screened from nearby dwellings. 4.12 A suite of recommendations designed to minimise and control plant noise levels outside nearby dwellings are detailed in Section 5.0. Servicing Noise Newspaper Delivery 4.13 A small van will drop-off newspapers/magazines to the retail unit daily between 06:00-07:00, stopping very briefly at the site. Associated noise will be relatively low and brief outside the nearest dwellings, and the character of the noise is of road traffic which is comparable to the existing noise climate around the site. Furthermore, momentary drop-offs are often recognised as low noise/impact activities and do not normally require separate assessment by Local Planning Authorities. Therefore, the morning newspaper drop-off is not considered likely to give rise to unacceptable noise impact at nearby dwellings. Tel: 0161 242 7900 Page 9 of 22
Daytime Deliveries 4.14 The highest levels of noise during deliveries would occur during a Co-operative main delivery, and it for these deliveries that noise impact has been considered. Noise during a bread delivery would be significantly lower. 4.15 For the daytime Co-operative deliveries, source noise levels associated with a HGV arrival, unloading full metal cages to the store using a tail lift, loading empty metal cages back onto the HGV, and the HGV departing have been measured at an existing Co-operative Convenience Store that is comparable in size and operating practices to the proposed store. The results of this survey shows that the noisiest activity is un/loading steel cages to/from the HGV. 4.16 HGV unloading during Co-operative deliveries would typically take place once per day in the daytime, between 09:00 and 20:00, and would take approximately 45mins. Assessment 4.17 The results of the noise surveys for a Co-operative delivery have been used to calculate resulting servicing noise levels for each type of delivery at Locations 1-3, taking any screening provided by the proposed 2.4m high timber fence (assuming that it provides the same attenuation as a proprietary timber noise barrier) and distance attenuation into consideration. 4.18 Given the impulsive nature of the noise associated with servicing activity, an acoustic feature penalty is considered applicable in accordance with BS 4142:2014, and to provide a robust assessment a penalty of +6dB has been applied. 4.19 The lowest measured background noise levels during the proposed delivery hours for each type of delivery have been used in this assessment. 4.20 To provide an initial assessment of the potential impact, in line with BS 4142:2014, the derived sound rating levels are compared to the existing background noise levels measured around the site on a Sunday morning, i.e. in the period in which they would likely occur. The results of our calculations are shown in Table 4 for ground floor level. Tel: 0161 242 7900 Page 10 of 22
Table 4: Initial BS 4142:2014 Assessment of Co-operative Daytime Delivery (07:00-20:00) Results Location 1 Location 2 Location 3 Specific Noise Level (db LAeq,1hr) 43 49 47 Acoustic feature correction +6 Noise rating level (db LAr,1hr) 49 55 53 Background Noise Level (db LA90) 41 39 41 Comparison (LAr,1hr LA90) +8 +16 +12 4.21 The results of the initial assessment show that for main deliveries at Location 1, noise levels from bread deliveries may result in an adverse impact but not a significant adverse impact. However, at Locations 2 and 3 that are closest to the un/loading activities, noise levels will be higher may give rise to significant adverse impact, depending on the context. 4.22 Where the initial estimate of the impact needs to be modified due to the context, BS 4142 states that all pertinent factors should be taken into account. 4.23 Main deliveries will take place once per day and take about 45 minutes to complete. Noise from HGV movement is also of the same character as the existing noise climate, and the use of any cages is sporadic and brief but would be subjectively apparent in lulls of road traffic on nearby roads. The calculated servicing noise levels are 13dB below the lowest existing ambient noise levels, at Location 1, no higher than the lowest existing ambient noise levels at Location 2 and 3dB below the lowest existing ambient noise levels at Location 3. 4.24 Given this context, and that daytime noise from main deliveries on a Sunday (typically the quietest day of the week - daytime background noise levels in the week are likely to be higher) will be below existing ambient (db L Aeq) noise levels, we consider that noise impact from servicing activities in the week or weekend would not give rise to unacceptable loss of residential amenity at nearby dwellings that would otherwise occur under use of the site under Permitted Development rights. 4.25 It must be accepted that as the site benefits from Permitted Development (PD) rights (and under certain circumstances) HGV s would be permitted to service the site in a manner comparable (or Tel: 0161 242 7900 Page 11 of 22
noisier) to those that would occur under the proposals or other retail store that would not require prior planning approval. 4.26 The Council has advised that they would seek to restrict deliveries in connection with the proposals, to minimise servicing noise at nearby dwellings. Nevertheless, applying servicing restrictions to a site having PD rights is understood to be inappropriate. 4.27 The EHO has stated that deliveries in the morning would be limited to occur from 07:30. The results of the survey show however that noise levels before 07:30 are only up to 1dB lower than noise levels after 07:30 in the morning. We therefore conclude that noise impact between 07:00-07:30 would be no more than during the suggested delivery hours (07:30 onwards) that would be considered acceptable by the Council. 4.28 The proposals also include main deliveries until 20:00, which is one hour later than the Council has suggested would be acceptable. The results of the noise survey show that background noise levels between 19:00-20:00 are higher than those measured earlier in the daytime. We therefore conclude that noise impact from main deliveries during the additional one 1 hour extension (19:00-20:00hrs) would be no more than during the suggested delivery hours that would be considered acceptable by the Council. 4.29 Therefore, we consider that noise from daytime deliveries will not give rise to an unacceptable noise impact provided some noise mitigation is incorporated into the design of the site. 4.30 The need to ensure that deliveries are carried out during approved times can be controlled by a suitably worded planning condition. 4.31 It must be noted that the application of any Conditions to an approval of the proposed food store make it possible to control potential noise impact from the site than would be permissible for any retail use of the store not be requiring a planning application under the PD rights of the site. 4.32 Notwithstanding the above, recommendations to control and minimise servicing noise to an acceptable level are detailed in Section 5.0. Tel: 0161 242 7900 Page 12 of 22
5.0 RECOMMENDATIONS Building Services Plant 5.1 In order to minimize noise from building services plant at nearby noise sensitive locations we would make the following recommendations at this stage; i. Plant noise levels should be controlled to be no more than the cumulative noise levels detailed in Table 3. ii. iii. iv. The proposed 2.4m high noise barrier around the yard and plant area must be imperforate, with ends of the barrier built off external walls. The barrier should be constructed using a proprietary timber acoustic fence of 20mm (min) thickness and a surface density of not less than 10kg/m 2 with no gaps. Suppliers of proprietary timber acoustic fencing include Jacksons Fencing (jacksons-fencing.co.uk) and Ransfords (ransfords.co.uk). Source noise levels of the proposed plant are unknown at this stage, but if suitably quiet plant cannot be incorporated into the proposals, it may be necessary to provide additional localised noise control such as installing an absorptive lining (such as 75mm mineral wool/ batts held in place with a metal mesh/perforated steel, (such as those manufactured by Expamet Ltd) to the inner side of the barrier and external walls (to minimise the build-up of reflected plant noise) of the building, or locating plant undercover so as to control plant noise outside first floor bedroom windows that would otherwise have an unrestricted line of sight to the plant. Once details of all plant and any extraction equipment that are to be installed at the site are known, the resulting daytime and night-time noise levels associated with the plant should be calculated and checked to ensure that the recommended plant noise limits can be achieved. Tel: 0161 242 7900 Page 13 of 22
Servicing Noise 5.2 In order to minimise noise from servicing activities at the site, we would make the following recommendations/suggestions: Where feasible, external ground areas of the site used by cages etc. is formed of a hardwearing rubber-crumb finish (similar to that commonly found in children s outdoor play areas), or temporary and robust matting is laid on the ground and tail lift. This will result in a reduction in the noise of both loaded and empty cages being moved to/from HGV s and the store. the 2.4m high noise barrier should be built around the site boundary as proposed and as shown in Figure 2, and be specified as in detailed in paragraph 5.1.ii. use of tonal vehicle reversing alarms should be minimised, and where feasible a member of store staff should act as a banksman to ensure safety whilst reversing which we understand is commonplace for convenience stores across the country where site layout/constraints dictate this is necessary for reasons other than noise alone. refrigeration equipment on delivery trucks is switched-off at the earliest opportunity, and whilst HGV is within the site boundary. The underside of the canopy in the rear yard should be solid, imperforate, have a surface density of not less than 10kg/m 2, and the formed be formed using a suitable material such as plywood, cement particle board or plasterboard plank. Tel: 0161 242 7900 Page 14 of 22
6.0 CONCLUSION 6.1 Hepworth Acoustics Limited was commissioned by The Co-operative Group to carry out a noise impact assessment in connection with a proposed change of use to a Convenience Store at the Mariner Public House, Mortimer Road, South Shields. 6.2 This has involved carrying out baseline noise monitoring surveys and evaluating potential noise impacts. 6.3 Full details of building services plant to be installed at the site are not available at this stage, and therefore cumulative noise limits have been recommended in order to adequately control noise impact from this aspect of the development that meet the advisory criterion suggested by the Council. Noise mitigation measures for the specific building services plant will need to be reviewed at the detailed design stage to ensure that cumulative noise from all plant can be adequately controlled and the adopted noise limits are not exceeded. 6.4 Momentary drop-offs of newspapers are recognised as low noise/impact activities and do not normally require separate assessment by Local Planning Authorities, and are not considered likely to give rise to unacceptable noise impact at nearby dwellings under the proposals. 6.5 Servicing noise during a daytime Co-operative HGV delivery has also been considered. Given the low frequency and short duration of un/loading activities, the nature and absolute levels of existing noise around the site and that of the deliveries, it is considered that noise from deliveries would not result in any unacceptable noise impact on the amenity of nearby dwellings provided that they are carried out during the proposed delivery times, and with the installation of the proposed 2.4m noise barrier at the site. Further pragmatic recommendations have been made to minimise noise from the site during daytime deliveries. 6.6 The need to control noise from the site can be secured by a suitably worded planning condition/s attached to any planning approval for the proposed store. Tel: 0161 242 7900 Page 15 of 22
Project: P16-051 Noise Impact Assessment Figure 1: Site Location and Noise Measurement Locations 3a 3 1a Figure 1 Co-Operative Foodstore, Mariners PH, Mortimer Road, South Shields Site Location and noise measurement locations. Key: Noise Measurement Location n Site boundary (approx.) 2 2b 2a Tel: 0161 242 7900 Page 16 of 22
Project: P16-051 Figure 2 Co-Operative Foodstore, Mariners PH, Mortimer Road, South Shields Noise Impact Assessment Proposed site layout and noise barrier Figure 2: Proposed site layout and noise barrier Key: Location of proposed2.4m high noise barrier Tel: 0161 242 7900 Page 17 of 22
Appendix I: Noise Units & Indices Sound and the decibel A sound wave is a small fluctuation of atmospheric pressure. The human ear responds to these variations in pressure, producing the sensation of hearing. The ear can detect a very wide range of pressure variations. In order to cope with this wide range of pressure variations, a logarithmic scale is used to convert the values into manageable numbers. Although it might seem unusual to use a logarithmic scale to measure a physical phenomenon, it has been found that human hearing also responds to sound in an approximately logarithmic fashion. The db (decibel) is the logarithmic unit used to describe sound (or noise) levels. The usual range of sound pressure levels is from 0 db (threshold of hearing) to 120dB (threshold of pain). Due to the logarithmic nature of decibels, when two noises of the same level are combined together, the total noise level is (under normal circumstances) 3 db(a) higher than each of the individual noise levels e.g. 60 db(a) plus 60 db(a) = 63 db(a). In terms of perceived loudness, a 3 db(a) variation in noise level is a relatively small (but nevertheless just noticeable) change. An increase in noise level of 10 db(a) generally corresponds to a doubling of perceived loudness. Likewise, a reduction in noise level of 10 db(a) generally corresponds to a halving of perceived loudness. The ear is not equally sensitive to sound at all frequencies. It is less sensitive to sound at low and very high frequencies, compared with the frequencies in between. Therefore, when measuring a sound made up of different frequencies, it is often useful to weight each frequency appropriately, so that the measurement correlates better with what a person would actually hear. This is usually achieved by using an electronic filter called the A weighting, which is built into sound level meters. Noise levels measured using the A weighting are denoted db(a) or dba. Tel: 0161 242 7900 Page 18 of 22
Frequency and Hertz (Hz) As well as the loudness of a sound, the frequency content of a sound is also very important. Frequency is a measure of the rate of fluctuation of a sound wave. The unit used is cycles per second, or hertz (Hz). Sometimes large frequency values are written as kilohertz (khz), where 1 khz = 1000 Hz. Young people with normal hearing can hear frequencies in the range 20 Hz to 20 khz. However, the upper frequency limit gradually reduces as a person gets older. Glossary of Terms When a noise level is constant and does not fluctuate, it can be described adequately by measuring the db(a) level. However, when the noise level varies with time, the measured db(a) level will vary as well. In this case it is therefore not possible to represent the noise climate with a simple db(a) value. In order to describe noise where the level is continuously varying, a number of other indices can be used. The indices used in this report are described below. L Aeq This is the A weighted 'equivalent continuous noise level' which is an average of the total sound energy measured over a specified time period. In other words, L Aeq is the level of a continuous noise which has the same total (A weighted) energy as the real fluctuating noise, measured over the same time period. It is increasingly being used as the preferred parameter for all forms of environmental noise. L Amax This is the maximum A weighted noise level that was recorded during the monitoring period. L A90 This is the A weighted noise level exceeded for 90% of the time period. L A90 is used as a measure of background noise. Tel: 0161 242 7900 Page 19 of 22
Appendix II: Noise Survey Results Date(s): Morning and Evening: Sunday 20 th March 2016 Equipment: Weather: All levels in db(a) Night: Monday 21 st March 2016 B&K 2260 Type 1 sound analyser (serial no. 02467015) with tripod and calibrator Morning and Evening Dry, cool and calm (<1 m/s) Night Dry, cool and calm (<1 m/s) Location 1 Location Time Measured Noise Levels (db) Start End L Amax L Aeq L A90 Morning Comments 1 06:03 06:18 73.6 51.8 40.6 Birdsong. Distant traffic. 1 06:59 07:14 83.1 58.1 44.0 Dog barking. Distant traffic. Birdsong. Distant metal impact sound. 1 07:49 08:04 75.2 55.5 41.6 Birdsong. Distant traffic. 1 08:39 08:54 78.8 60.6 41.4 Birdsong. Local and distant traffic. Evening 1A 19:06 19:21 79.4 64.5 46.2 Local and distant traffic. 1A 20:18 20:33 81.8 65.3 46.0 Local and distant traffic. Passing pedestrians. 1A 21:21 21:36 77.9 61.4 41.0 Local and distant traffic. 1A 22:18 22:33 78.4 60.0 39.6 Local and distant traffic. Night-time 1A 00:59 01:14 78.1 53.8 38.2 Local and distant traffic. Distant metal impact sound. 1A 01:51 02:07 78.0 54.2 39.0 Local and distant traffic. Tel: 0161 242 7900 Page 20 of 22
Location 2 Location Time Measured Noise Levels (db) Start End L Amax L Aeq L A90 Morning 2 06:21 06:36 64.9 46.0 40.0 2 07:15 07:30 67.6 49.8 41.0 Comments Birdsong. Distant traffic. Kitchen extract fan. Birdsong. Distant metal impact sound. Distant traffic. 2 08:05 08:20 68.2 48.9 39.8 Birdsong. Distant traffic. 2 08:54 09:09 68.4 50.7 39.2 Birdsong. Local and distant traffic.. Evening 2A 20:00 20:15 69.4 52.5 42.0 2A 20:53 21:08 68.0 46.0 39.6 2B 21:55 22:10 69.9 49.9 40.6 Local and distant traffic. Aircraft passing overhead. Local and distant traffic. Passing pedestrians. Local and distant traffic. Boiler exhaust from nearby home. 2B 22:52 23:07 70.0 47.7 39.0 Local and distant traffic. Night-time 2B 01:31 01:48 75.8* 52.5* 40.0 Local and distant traffic (*police car). Tel: 0161 242 7900 Page 21 of 22
Location 3 Location Time Measured Noise Levels (db) Start End L Amax L Aeq L A90 Morning Comments 3 06:41 06:56 70.7 53.1 43.4 Birdsong. Distant traffic. 3 07:33 07:48 72.1 54.4 43.2 3 08:22 08:37 66.9 50.3 41.6 Birdsong. Local and distant traffic. Kitchen extract fan. Birdsong. Local and distant traffic. Kitchen extract fan. 3 09:10 09:25 66.1 51.6 40.6 Birdsong. Local and distant traffic. Evening 3A 19:22 19:37 75.8 58.7 41.6 Local and distant traffic. 3A 20:36 20:51 73.4 57.6 43.2 Local and distant traffic. 3A 21:37 21:52 71.7 54.0 39.8 Local and distant traffic. 3A 22:35 22:50 71.1 51.8 39.0 Local and distant traffic. Night-time 3A 01:14 01:29 66.4 46.5 40.8 Distant traffic 3A 02:08 02:23 64.6 47.2 40.0 Distant traffic. Tel: 0161 242 7900 Page 22 of 22