Beeston, Lane, Oldbtckstorage.blob.core.windows.net/site1015/Tesco...1.1 The Sharps Redmore Partnership Limited (SRP) was instructed by Tesco Stores Limited to undertake an environmental

Project No: 1011276 14th September 2010

ENVIRONMENTAL NOISE ASSESSMENT

OF A PROPOSED TESCO SUPERSTORE,

MOORHOUSE AVENUE,

BEESTON,

LEEDS

Prepared by:

K. J. Metcalfe

BSc(Hons), MIOA

REPO

RT ‐

Tesco Store, Old Lan

e, Beeston

, Leeds

The White House, London Road, Copdock, Ipswich. IP8 3JH. Website: www.sharpsredmore.co.uk Telephone: (01473) 730073 Fax: (01473) 730030 Email: [email protected] Directors: TL Redmore BEng MSc PhD MIOA; KJ Gayler CEnv BSc(Hons) MIEnvSc MIOA; RD Sullivan BA PhD CEng MIOA MAAS Sharps Redmore Partnership Limited. Registered in England No. 2593855

CONTENTS

1.0 Introduction

2.0 Assessment Methodology and Criteria

3.0 Noise Survey Details

4.0 Fixed plant noise

5.0 Service yard noise

6.0 Car park activity noise

7.0 Road traffic noise

8.0 Conclusion

Appendix A Proposed site plan

Appendix B Noise Survey Results

Appendix C Screening calculations

Appendix D Acoustic Terminology

Project No: 1011276 Page 3 of 18

1.0 Introduction

1.1 The Sharps Redmore Partnership Limited (SRP) was instructed by Tesco Stores

Limited to undertake an environmental noise assessment of a proposed Tesco store

at Old Lane, Beeston, Leeds. The proposal is for a Tesco retail store with associated

car parking and service area. The proposed site plan is reproduced in Appendix A.

1.2 This assessment is based on Smith Smalley Architects (SSA) proposed layout drawing

5004 11 and proposed elevations drawing 5004 08.

1.3 The objective of the assessment is to determine how noise that may be generated as

a result of the proposal would affect the amenities of adjacent residents.

1.4 Section 2.0 contains a discussion of the available methods of assessment and

assessment criteria.

1.5 Section 3.0 of this report contains details of the environmental noise survey.

1.6 The different components of operational noise are considered in sections 4.0 to 7.0

of this report. The assessment conclusions are presented in section 8.0.

1.7 A guide to the acoustic terminology used in this report is shown in Appendix D.


2.0 Assessment methodology and criteria

2.1 The effect produced by the introduction of a noise source into an environment may

be determined by:

i) reference to guideline noise levels. The World Health Organisation (WHO)

Guidelines for Community Noise and British Standard (BS) 8233:1999 “Sound

insulation and noise reduction for buildings” contain such guidance values.

This method is well suited to the assessment of noise from an activity that is

fixed within a defined boundary to a relatively small number of receptors.

ii) reference to the existing background noise level (LA90). This is the method

employed by BS 4142:1997 “Method for rating industrial noise affecting

mixed residential and industrial areas” to determine the likelihood of

complaints about noise “… of an industrial nature in commercial premises...”

amongst others.

iii) reference to the change in noise level that would result from the proposal.

This is the method that is suited to, for example, the assessment of noise

from road traffic because it is capable of displaying impact to all properties

adjacent to a road link irrespective of their distance from the road.

2.2 With these assessment methods in mind, the following activities have been assessed

as follows:

i) Fixed mechanical and refrigeration plant ‐ BS 4142

ii) Service yard activity ‐ guideline values

iii) Car parking activity ‐ guideline values

iv) road traffic noise ‐ change in noise level


Guideline noise values

2.3 There are a number of guidance documents that contain recommended guideline

noise values. These are discussed below.

2.4 In PPG 24 Annex 3, reference is made to BS 8233:1987 (now superseded by

BS 8233:1999). This Standard is principally intended to assist in the design of new

dwellings; however, the Standard does state that it may be used in the assessment

of noise from new sources being brought to existing dwellings.

2.5 BS 8233:1999 was based on the advice contained in a draft of World Health

Organisation document “Guidelines for community noise”. This document was

released in final form in 2000.

2.6 The WHO guideline values are appropriate to what are termed “critical health

effects”. This means that the limits are at the lowest noise level that would result in

any psychological, physiological or sociological effect.

2.7 In this respect, the guideline values are robust against the national policy that

“significant adverse impacts should be avoided and alternative options which might

reduce or eliminate those impacts pursued” (my emphasis) (Ref Planning Policy

Statement 1 [PPS 1], paragraph 19). The guidance in PPS 1 was recently reinforced

by the release of the DEFRA publication, “Noise Policy Statement for England”

(March 2010), which states three policy aims, as follows:

“Through the effective management and control of environmental, neighbour and

neighbourhood noise within the context of Government policy on sustainable

development:

1. avoid significant adverse impacts on health and quality of life;

2. mitigate and minimise adverse impacts on health and quality of life; and

3. where possible, contribute to the improvement of health and quality of

life.”


2.8 The WHO and BS 8233 guideline values are summarised in the following table:

TABLE 1: Guideline noise levels

Document Limit Guidance

LAeqT = 55 dB Serious annoyance, daytime and

evening. (Continuous noise, outdoor living areas)

LAeqT = 50 dB Moderate annoyance, daytime and evening. (Continuous noise, outdoor

living areas).

LAeqT = 35 dB Moderate annoyance, daytime and

evening. (Continuous noise, dwellings, indoors)

LAeqT = 45 dB Sleep disturbance, window open at night. (Continuous noise, outside

bedrooms, outdoor values)

LAeqT = 30 dB Sleep disturbance at night.

(Continuous noise, bedrooms, indoors)

LAMAX = 60 dB

Sleep disturbance, window open at night.

(Noise peaks, outside bedrooms, outdoor values)

World Health Organisation “Community Noise 2000”

LAMAX = 45 dB Sleep disturbance at night.

(Noise peaks, bedrooms, indoors)

LAeqT = 55 dB Upper limit for external steady noise.

(Gardens and balconies).

LAeqT = 30 dB Good resting/sleeping conditions for

living rooms during the day (Internal – steady noise)

LAeqT = 40 dB Reasonable resting/sleeping conditions

for living rooms during the day. (Internal – steady noise)

LAeqT = 30 dB Good resting/sleeping conditions for

bedrooms during the night. (Internal – steady noise)

LAeqT = 35 dB Reasonable resting/sleeping conditions

for bedrooms during the night. (Internal – steady noise)

BS 8233:1999 “Sound Insulation and noise reduction for buildings”

LAMAX = 45 dB Limit for individual noise events for a reasonable standard in bedrooms at

night. (Internal)


2.9 For LAeqT criteria the time base (T) given in the documents is 16 hours for daytime

limits and 8 hours for night time limits. When assessing impact, this has the

tendency to smooth out the hourly variations in noise level. As such, our calculations

are carried out to a 1 hour time base, which is a more stringent assessment than is

given in the guidance documents.

2.10 Within the Glossary of PPG 24 it states that:

"A change of 3 dB(A) is the minimum perceptible under normal circumstances,

and a change of 10 dB(A) corresponds roughly to halving or doubling the

loudness of the sound."

Where the existing ambient noise level is already above the criteria developed from

the various guidance documents, it may be considered unreasonable to adopt such

criteria. It would be reasonable, however, given the above statement from PPG 24 to

consider criteria which do not exceed the existing noise climate, thus giving rise to an

overall 3 dB increase i.e. the minimum perceptible. If it is less than the minimum

perceptible it cannot really be described as disturbing or to affect the amenity of

residents.


BS 4142:1997 – Fixed mechanical services plant

2.11 BS 4142 considers that the difference between the rating level of noise from fixed

plant on the site and the background noise level of the area is indicative of the

likelihood of complaint. This is referenced in PPG 24, Annex 3, paragraph 19:

"The likelihood of complaints about noise from industrial development can be

assessed, where the Standard is appropriate, using guidance in BS 4142:1990.

Tonal or impulsive characteristics of the noise are likely to increase the scope

of complaints and this is taken into account by the "rating level" defined in BS

4142. This "rating level" should be used when stipulating the level of noise

that can be permitted.

The likelihood of complaints is indicated by the difference between the noise

from the new development (expressed in terms of the rating level) and the

existing background noise. The Standard states that: "A difference of around

10 dB or higher indicates that complaints are likely. A difference of around

5 dB is of marginal significance".

2.12 The PPG 24 quote from BS 4142 states that a difference between the corrected

measured noise level (LAeqT) and the pre‐existing background noise level (LA90T), of

around 10 dB or higher indicates that complaints are likely. It also indicates that a

difference of around 5 dB is of marginal significance. PPG 24 suggests no other criteria

or requirement for the consideration of a planning application containing noise

attributable to an industrial type noise. Plant noise criteria are discussed and

developed further in Section 4.0.


2.13 On this basis therefore it would be reasonable to expect a condition, based on the

guidance in PPG 24, that the "rating level" in accordance with BS 4142 should not

exceed the background noise level by more than +5 dB. SRP understands that the

general intent of the planning system is to ensure that a development does not

result in “significant” adverse environmental impacts (ref. Planning Policy Statement

1, paragraph 19). This intent is, in our judgement, equivalent to the BS 4142

marginal significance criterion of background noise level plus 5 dB(A). Details of the

noise survey undertaken at the site are presented in Section 3 of this report and

plant noise criteria are discussed and developed in the context of the noise survey

results in Section 4.0.

2.14 BS 4142 considers the night period to "cover the times when the general adult

population are preparing for sleep or are actually sleeping". The PPG 24 also uses a

similar expression and identifies this period as 2300 to 0700 hours (paragraph 12 and

paragraph 7 of annex 1). The reference period of measurement and assessment, T,

used in BS 4142 is taken as 5 minutes for night, 2300 to 0700 hours, and 1 hour for

day, 0700 to 2300 hours.

Changes in noise level – customer vehicles on highway

2.15 As indicated in paragraph 2.10 above, PPG 24 notes that changes in noise levels of

less than 3 dB(A) are not perceptible under normal conditions and changes of

10 dB(A) are equivalent to a doubling of loudness. This guidance has been accepted

by inspectors, at inquiry, to encompass changes in noise levels in the index LAeqT in

relation to traffic noise.

2.16 The following table has been employed widely by acoustic consultants and

practitioners in the subject:

TABLE 2: Subjective response to changes in noise level

Change in noise level LAeqT dB

Response Impact


Change in noise level LAeqT dB

Response Impact

6 – 10 Up to a doubling of loudness Significant

11 – 15 Over a doubling of loudness Substantial

> 15 ‐ Severe


3.0 Noise Survey Details

3.1 A noise survey was undertaken between Wednesday 5th and Thursday 6th

November 2008 at a single measurement location representative of the existing

noise climate to which the closest residences in Old Lane are exposed (see Appendix

A).

3.2 Noise measurements were taken using a Norsonic 118 sound level meter. The

sound level meter was calibrated at the start and end of the survey and no variation

in level was noted. The sound level measurements were taken over 10 minute

periods in weather conditions which satisfy the requirements of BS 4142:1997. The

noise measurements were undertaken in free field conditions.

3.3 Weather conditions encountered during the survey were dry and cloudy with a light

breeze blowing in variable directions, and temperatures ranging between 6 and 80C.

3.4 During the survey it was noted that the local noise climate was influenced by road

traffic noise from vehicles travelling along Old Lane, together with contributions

from the two industrial parks accessed either side of the application site.

3.5 The measured noise levels from the survey are summarised below and presented in

full in Appendix B.

TABLE 3: Summary of measured noise levels

Measured noise levels dB

Daytime (0700 – 2300) Night time (2300 – 0700)

Monitoring Location

LA90 LAeqT LA90 LAeqT LAMAX

A 42.6 – 58.9 61.9 – 73.6 35.3 – 52.1 37.6 – 64.7 42.4 ‐ 83.1


4.0 Fixed plant noise

4.1 It is not yet known what fixed plant will be needed for this development. However

the likely location for the mechanical services plant is above the bulk store area at

the rear of the store. In addition a Combined Heat and Power (CHP) unit or an Air

Source Heat Pump (ASHP) unit is proposed to be installed within the service yard.

4.2 Noise from the mechanical services plant noise will need to be attenuated. This

could be achieved using screening to the closest residential properties, by the

selection of intrinsically quiet equipment or equipment fitted in the factory with

atmospheric side noise control devices such as acoustic louvers and attenuators.

4.3 The closest residential properties to the likely mechanical services plant area are

likely to be those opposite the proposed store on Old Lane. Immediately adjacent to

the likely plant areas and the service yard are industrial units.

4.4 With regard to the assessment of industrial noise sources in commercial premises

(i.e. fixed mechanical plant associated with a retail development), British Standard

4142:1997 ‘Method for Rating industrial noise affecting mixed residential and

industrial areas’ enables the resultant noise level from new equipment to be

compared against the existing background noise level (LA90) of an area to assess the

likelihood of complaints.

4.5 In determining suitable plant noise criteria SRP have considered the lowest

measured background noise levels taken during the noise survey. To ensure that the

amenity of local residents would not be affected, it is considered that the “rating noise

level” (the predicted noise level plus any penalty for character) should not exceed the

lowest measured background noise level.

4.6 The lowest measured background noise levels were 43 dB LA90 during the daytime

and 35 dB LA90 during the night time period.


4.7 The following plant noise (rating) levels are proposed to control noise from fixed

plant and equipment:

Daytime = 43 dB

Night time = 35 dB

4.8 The following planning condition is recommended to secure the above criteria:

"No fixed plant and/or machinery shall come into operation until details of

the fixed plant and machinery serving the development hereby permitted,

and any mitigation measures to achieve this condition, are submitted to and

approved in writing by the local planning authority. The rating level of the

noise emitted from fixed plant shall not exceed 43 dBA between 0700 and

2300 hours and 35 dBA at any other time. The noise levels shall be

determined by measurement or calculation at the nearest noise sensitive

premises. The measurements and assessment shall be made according to

BS 4142:1997."


5.0 Service yard noise

5.1 SRP has undertaken a series of noise measurements of retail store delivery events.

The following maximum sound levels have been used extensively in the planning and

design of stores:

TABLE 4: Delivery noise source noise levels

Event Noise Level (at 10m) Arrival Unloading Departure

Duration (mins)

LAeqT (dB)

Duration(mins)

LAeqT (dB)

Duration(mins)

LAeqT (dB)

2.5 69 30 66 0.5 72

5.2 All these sound levels are representative at 10 metres and are measured with the

microphone in free field, away from any reflecting surfaces. The levels stated are

realistic worst case noise levels from a large collection of sample measurements.

Peak noise from a delivery event is associated with engine noise as the vehicle

approaches the service yard on the access road and on manoeuvring within the

service yard and from roll cage movements as a delivery is unloaded; peak noise

levels of 79 dB LAmax at 10 metres have been recorded.

5.3 The closest residential property to the main service yard is 99 Old Lane. All of the

properties in Old Lane will benefit from significant screening to delivery activity

within the service yard due to screening afforded by the store building which is

approximately 6 metres high.


5.4 The following tables show calculated noise levels from delivery event activity from

within the service yard at 99 Old Lane.

TABLE 5: Delivery event noise at 99 Old Lane

Component of delivery process Resultant noise

level (dB) Arrival Baseline level LAeq 2.5 = 69 Distance attenuation to 122 metres = 20 log 10/122 = ‐22 dB LAeq 2.5 = 47

Screening loss = ‐12 dB (see Appendix C1 ) LAeq 2.5 = 35 Convert to 1 hour = 10 log 2.5/60 = ‐14 LAeq1 hr = 21 Unloading Baseline level LAeq 30 = 66 Distance attenuation to 103 metres = 20 log 10/103 = ‐20 dB LAeq 30 = 46 Screening loss = ‐13 dB (see Appendix C2 ) LAeq 30 = 33 Convert to 1 hour = 10 log 30/60 = ‐3 LAeq1 hr = 30 Departure Baseline level LAeq 0.5 = 72 Distance attenuation to 122 metres = 20 log 10/122= ‐22 dB LAeq 0.5 = 50 Screening loss = ‐ 12 dB (see Appendix C1 ) LAeq 0.5 = 38 Convert to 1 hour = 10 log 0.5/60 = ‐21 LAeq1 hr = 17 Overall delivery process 21+30+17 (+3 dB façade) LAeq1 hr = 34 dB GUIDELINE DAYTIME CRITERION (LAeq 16 hour) 55 dB GUIDELINE NIGHT TIME CRITERION (LAeq 8 hour) 45 dB Peak noise (delivery vehicle on access road to service yard) Baseline level LAmax = 79 Distance attenuation to 95 metres = 20 log 10/96 = ‐20 dB LAmax = 59 Screening loss = ‐0 dB LAmax = 59 Resultant peak noise level ‐ arrival / departure (+3 dB façade)

LAmax = 62 dB

GUIDELINE PEAK NOISE CRITERION (night time) LAmax = 60 dB Typical existing night time peak noise climate LAmax = 69 – 83 dB

5.5 The Screening calculations in the tables above are based on screening provided by

the Tesco store building.

5.6 Predicted delivery event noise levels comply with the daytime and night time

WHO/BS8233 guideline values. Whilst predicted peak noise levels from delivery

vehicles approaching the service yard exceed the WHO night time peak noise

guideline value, the existing typical peak noise climate (2300 to 0700 hours) is well

above the predicted peak noise values. On this basis it is considered that deliveries

could be made at night without associated noise adversely affecting residential

amenity.


6.0 Car park activity noise

6.1 The closest residences to the proposed car park are those in Old Lane approximately

26 metres away from the closest spaces.

6.2 SRP has previously undertaken extensive noise monitoring of superstore car parks;

at 10 metres from the boundary of a busy car park measured noise levels are 48 dB

LAeq,1hr (free field) have been found.

6.3 The predicted noise levels at one metre from the façade of 95 Old Lane would be

36 dB LAeq,1hr (48+20 log [10/26] – 7 dB [screening‐ see Appendix C3] +3 dB [façade

correction]).

6.4 Peak noise levels in car parks have been attributed to car door slam events. SRP

have measured noise from a considerable number of car door slam events and peak

noise levels can be up to 66 dB LAmax (free field) at 10 metres from the vehicle.

6.5 At 26 metres predicted peak noise levels from car door slams at 1 metre from the

façade will be 54 dB LAmax (66‐8‐7+3).

6.6 Both the ambient and peak noise levels associated with customer car parking

comply with both daytime and night time guideline noise levels; furthermore the

predicted noise levels are significantly below the existing noise climate.

6.7 It is concluded that, in relation to customer car parking noise, the store can trade on

an unrestricted basis without adversely affecting residential amenity.


7.0 Road traffic noise

7.1 The increase in road traffic noise as a result of the development can be determined

by comparing the base traffic flows (2008), with the base + development flows

(2008), provided to SRP by Mouchel, by means of the formula found in “Calculation

of Road Traffic Noise”:

Increase in noise level = 10 log10 (future total traffic flow ÷ existing traffic flow) dB

7.2 To increase the noise level by 3 dBA, the minimum perceptible, the future traffic flow

would need to be at least twice the existing traffic flow.

7.3 This assessment of road traffic noise has been undertaken for two way Saturday peak

hour flows with and without the development for the base year 2008 for Old Lane,

between the junction with Moorhouse Avenue and Dewsbury Road.

TABLE 6: Traffic noise increases –2008 Saturday peak hour flows

2008 Baseline flow

2008 with development

flow

Change in noise level

(dB) Impact

1047 1188 +0.55 Negligible

7.4 Table 6 demonstrates that the change in road traffic noise as a result of the proposal

complies with the requirements of PPS 1 to avoid significant adverse impacts on the

environment.


8.0 Conclusions

8.1 This technical report demonstrates that the development could proceed without the

likelihood of noise from subsequent operations harming the amenity of local

residents, on the basis of the following operating conditions:

Store trading: Unrestricted

Store servicing: Unrestricted

8.2 Mechanical services and refrigeration plant will be designed such that the adopted

noise rating level criteria of 43 dB daytime and 35 dB at any other time is achieved at

the nearest noise sensitive property.

8.3 The following planning condition is recommended to secure the above criteria:

"No fixed plant and/or machinery shall come into operation until details of

the fixed plant and machinery serving the development hereby permitted,

and any mitigation measures to achieve this condition, are submitted to and

approved in writing by the local planning authority. The rating level of the

noise emitted from fixed plant shall not exceed 43 dBA between 0700 and

2300 hours and 35 dBA at any other time. The noise levels shall be

determined by measurement or calculation at the nearest noise sensitive

premises. The measurements and assessment shall be made according to

BS 4142:1997."

APPENDIX A

PROPOSED SITE PLAN

Appendix A: Proposed site plan showing noise measurement location

Noise measurement location A

APPENDIX B

NOISE SURVEY RESULTS

Appendix B: Noise survey results

LA10 LA90 LAeq LAMAX LAMIN

5.11.08 11:40:00 67.7 53.5 67.9 92.9 49.011:50:00 68.0 54.8 64.5 77.8 50.312:00:00 67.1 56.0 63.7 71.3 50.312:10:00 68.3 54.4 64.9 75.4 49.312:20:00 68.7 55.0 65.4 78.7 48.012:30:00 68.0 54.5 64.5 72.2 49.212:40:00 68.2 57.2 69.6 93.4 52.812:50:00 68.4 55.2 65.0 74.9 51.113:00:00 68.7 56.1 65.6 74.4 50.113:10:00 68.7 55.0 65.1 74.3 50.513:20:00 68.1 52.4 64.7 74.5 48.313:30:00 68.6 55.2 65.2 81.1 50.713:40:00 68.1 55.2 64.8 80.5 50.513:50:00 68.2 55.5 64.9 74.6 49.914:00:00 68.5 54.9 64.9 75.8 48.214:10:00 68.7 53.9 64.9 73.2 47.914:20:00 68.4 54.9 65.1 77.5 48.714:30:00 68.1 54.2 64.8 77.3 49.214:40:00 68.3 57.9 65.8 77.6 53.114:50:00 68.2 57.2 65.1 73.4 51.715:00:00 67.9 57.3 65.0 75.0 52.815:10:00 68.5 56.8 65.1 73.7 51.415:20:00 68.2 57.3 65.1 75.4 49.715:30:00 68.7 57.8 65.6 74.9 50.115:40:00 68.7 56.8 65.4 73.3 51.815:50:00 67.5 53.3 64.0 78.8 47.816:00:00 69.0 56.7 65.8 74.2 50.116:10:00 68.7 57.0 65.3 72.9 48.416:20:00 68.6 56.5 65.4 77.0 51.416:30:00 68.0 56.6 64.9 75.3 48.616:40:00 68.2 58.4 65.3 73.6 52.416:50:00 68.9 56.0 66.3 90.9 47.917:00:00 68.3 58.9 66.1 90.1 51.217:10:00 65.7 55.1 62.5 82.9 52.217:20:00 66.3 54.8 63.7 86.6 51.317:30:00 67.4 55.0 64.0 81.5 52.417:40:00 66.8 55.7 63.9 83.4 53.117:50:00 67.4 54.8 64.0 86.3 51.618:00:00 68.3 55.7 65.4 85.5 48.318:10:00 68.6 57.0 65.8 81.4 48.518:20:00 69.3 58.3 66.9 86.9 51.418:30:00 69.6 58.0 67.9 94.6 50.218:40:00 68.8 57.8 67.7 93.9 45.818:50:00 69.0 55.2 66.8 92.2 48.119:00:00 70.9 55.4 71.8 99.7 46.819:10:00 69.6 55.6 71.9 99.7 48.519:20:00 70.2 55.7 68.2 89.5 47.619:30:00 70.7 54.0 69.5 90.6 46.619:40:00 70.5 54.2 69.0 93.9 47.1

Appendix B1 Title: Noise survey results

Measurement location A ‐ Old Lane

Date Sample start timeNoise Parameter ‐ dB

Appendix B: Noise survey results … continued


5.11.08 19:50:00 73.2 55.2 73.6 99.5 46.520:00:00 68.8 55.2 68.8 97.6 47.420:10:00 70.9 53.3 69.5 92.6 47.020:20:00 70.3 56.7 69.9 98.9 48.220:30:00 70.5 55.2 67.6 87.2 48.420:40:00 68.2 51.5 64.1 82.5 46.620:50:00 67.8 49.3 64.1 89.6 44.621:00:00 69.2 52.5 69.1 98.5 44.121:10:00 68.5 52.9 65.3 86.9 46.521:20:00 69.2 51.3 70.5 97.6 43.921:30:00 67.9 51.8 65.6 88.1 45.321:40:00 67.3 49.7 65.8 92.8 43.821:50:00 67.4 49.9 63.8 84.7 42.122:00:00 67.9 50.8 64.0 82.7 44.222:10:00 67.4 48.6 62.9 80.1 44.522:20:00 66.3 45.7 61.6 79.4 40.922:30:00 66.1 47.2 62.6 84.0 41.722:40:00 67.3 45.4 65.4 85.7 40.722:50:00 65.9 42.6 61.9 84.0 39.823:00:00 64.5 41.4 59.8 79.8 39.123:10:00 65.3 42.3 60.1 76.7 39.323:20:00 64.6 40.5 59.3 72.4 37.923:30:00 63.9 39.9 58.8 74.3 37.523:40:00 59.9 38.9 56.3 75.5 37.123:50:00 63.9 40.0 58.7 71.8 37.7

6.11.08 00:00:00 62.8 41.1 58.2 72.5 37.200:10:00 63.6 39.2 58.7 74.9 36.500:20:00 58.6 37.3 55.7 73.1 35.200:30:00 63.3 37.6 58.5 73.7 35.900:40:00 56.1 37.1 54.2 71.0 35.200:50:00 58.2 37.1 55.4 71.2 35.601:00:00 47.6 37.0 49.9 72.9 35.301:10:00 61.6 37.7 57.3 72.4 35.901:20:00 51.3 36.0 51.9 69.0 34.401:30:00 46.0 36.1 52.2 72.3 34.701:40:00 48.6 35.9 50.9 69.6 34.501:50:00 43.0 35.3 51.0 74.1 33.902:00:00 40.1 35.4 49.5 69.4 34.102:10:00 49.5 35.5 52.9 72.1 34.002:20:00 45.9 35.6 53.0 76.8 33.902:30:00 50.2 36.5 52.9 72.1 35.202:40:00 48.8 35.9 55.7 80.4 34.502:50:00 50.2 35.6 58.9 83.1 33.603:00:00 55.4 35.8 55.7 73.0 34.003:10:00 45.1 36.4 49.7 69.8 34.903:20:00 54.3 36.5 56.2 76.4 34.903:30:00 57.0 35.9 56.9 74.7 34.303:40:00 38.7 36.2 37.6 42.4 34.703:50:00 39.2 35.7 37.8 45.1 34.0




Appendix B: Noise survey results … continued


6.11.08 04:00:00 42.7 37.3 48.4 70.8 35.804:10:00 48.0 37.7 51.8 70.6 36.004:20:00 54.6 37.7 54.1 72.1 36.104:30:00 45.2 38.7 53.0 73.4 36.904:40:00 54.4 38.8 54.2 71.7 36.604:50:00 55.3 39.0 53.7 71.2 36.805:00:00 55.8 39.4 55.4 72.2 37.505:10:00 62.5 39.9 58.2 73.9 38.405:20:00 61.2 39.8 57.7 72.4 38.005:30:00 65.3 44.8 59.7 71.1 41.005:40:00 66.2 46.1 61.4 75.1 42.405:50:00 63.0 44.4 59.6 79.1 42.706:00:00 66.9 45.6 61.7 73.8 43.306:10:00 65.7 45.8 60.2 72.7 44.206:20:00 67.7 48.0 62.7 76.6 45.606:30:00 67.7 47.7 62.5 76.1 45.206:40:00 69.6 52.1 65.7 76.1 48.606:50:00 69.5 49.0 64.9 80.0 46.007:00:00 69.2 50.0 65.1 76.3 46.307:10:00 69.2 53.9 65.6 75.9 49.007:20:00 68.9 56.1 65.6 76.2 50.507:30:00 69.3 57.9 66.3 76.7 51.707:40:00 69.3 58.0 66.3 75.9 51.507:50:00 69.6 57.0 66.3 72.9 50.208:00:00 69.4 56.8 66.5 77.5 49.508:10:00 69.4 55.2 65.9 75.5 49.808:20:00 69.3 56.6 65.8 74.6 50.708:30:00 69.5 58.9 66.2 74.3 50.308:40:00 69.4 58.0 66.6 79.1 48.208:50:00 68.8 56.0 65.5 74.5 50.909:00:00 69.2 58.8 66.2 74.2 52.009:10:00 69.4 55.0 65.9 78.6 49.409:20:00 68.5 53.5 64.7 75.2 47.409:30:00 67.9 53.4 64.2 72.1 46.109:40:00 68.2 52.9 64.6 76.0 46.109:50:00 68.4 54.6 64.8 74.0 49.610:00:00 68.0 53.9 64.4 73.8 48.510:10:00 67.9 55.0 64.3 72.9 45.110:20:00 67.7 54.6 64.4 82.5 48.710:30:00 68.2 52.9 65.8 88.4 46.8




APPENDIX C

SCREENING CALCULATIONS

Appendix C: Screening calculations

Appendix C1

Receptor:Project:

Source:

Path difference = 0.339 m

63 125 250 500 1K 2K 4K 8K CRTN7.4 9.0 11.1 13.6 16.3 19.1 22.1 25.0 12.1 dBA

6.0 m

Source‐to‐Barrier Distance

38.0 m

99 Old Lane

Receiver:

Tesco Old Lane, Beeston, Leeds

99 Old Lane

Height

Source‐to‐Barrier Distance Source Height

BASIC BARRIER ATTENUATION

BarrierHeight

Source Receiver

(based on Maekawa or CRTN)

Deliveries: Arrival and departure

Height

Receiver‐to‐Barrier Distance

Barrier Height

Attenuation ‐ dB

84.0 m1.0 m3.5 mReceiver‐to‐Barrier Distance Receiver Height

Frequency ‐ Hz

Appendix C2

Receptor:Project:

Source:


63 125 250 500 1K 2K 4K 8K CRTN8.6 10.5 12.9 15.6 18.4 21.3 24.3 27.3 13.5 dBA

Height


Barrier Height

Attenuation ‐ dB


Frequency ‐ Hz

Height



BarrierHeight

Source Receiver


Deliveries: Unloading

99 Old Lane

Receiver:


99 Old Lane

6.0 m


18.0 m

Appendix C: Screening calculations … continued

Appendix C3

Receptor:Project:

Source:


63 125 250 500 1K 2K 4K 8K CRTN5.0 5.2 5.5 6.1 7.2 8.7 10.7 13.1 7.0 dBA

1.0 m


2.0 m

95 Old Lane

Receiver:


95 Old Lane

Height



BarrierHeight

Source Receiver


Car parking

Height


Barrier Height

Attenuation ‐ dB


Frequency ‐ Hz

APPENDIX D

ACOUSTIC TERMINOLOGY

Appendix D: Acoustic Terminology

1. Noise, defined as unwanted sound, is measured in units of decibels, dB. The range

of audible sound is from 0 dB to 140 dB. Two equal sources of sound, if added

together will result in an increase in level of 3 dB, i.e. 50 dB + 50 dB = 53 dB. A 10 dB

increase in sound is perceived as a doubling of loudness.

2. Frequency (or pitch) of sound is measured in units of Hertz. 1 Hertz = 1

cycle/second. The range of frequencies audible to the human ear is around 20 Hz to

18000 Hz (or 18 kHz). The capability of a person to hear higher frequencies will

reduce with age. The ear is more sensitive to medium frequency than high or low

frequencies.

3. To take account of the varying sensitivity of people to different frequencies a

weighting scale has been universally adopted called “A‐weighting”. The measuring

equipment has the ability to automatically weight (or filter) a sound to this A scale

so that the sound level it measures best correlates to the subjective response of a

person. The unit of measurement thus becomes dBA (decibel, A‐weighted).

4. The second important characteristic of sound is amplitude or level. Two units are

used to express level a) sound power level ‐ Lw, and b) sound pressure level ‐ Lp.

Sound power level is an inherent property of a source whilst sound pressure level is

dependent on surroundings/distance/directivity etc. The sound level that is

measured on a meter is the sound pressure level, Lp.

5. External sound levels are rarely steady but rise or fall in response to the activity in

the area ‐ cars, voices, planes, birdsong, etc. A person’s subjective response to

different noises has been found to vary dependent on its temporal distribution (i.e.

its variation with time). For this reason a set of statistical indices have been

developed.

6. There are four main statistical indices in use in the UK:

LA90 The sound level (in dBA) exceeded for 90% of the time. This unit

gives an indication of the sound level during the quieter periods of

time in any given sample. It is used to describe the “background

noise level” of an area.

LAeqT The equivalent continuous sound level over a period of time, T. this

unit may be described as “the notional steady noise level that would

provide, over a period, the same energy as the varying noise in

question”. In other words, the energy average level. This unit is

now used to measure a wide variety of different types of noise of an

industrial or commercial nature, as well as road traffic, aircraft and

trains.

LA10 The sound level (in dBA) exceeded for 10% of the time. This level

gives an indication of the sound level during the noisier periods of

time in any given sample. It has been used over many years to

measure and assess road traffic noise.

LAMAX The maximum level of sound, i.e. the peak level of sound measured

in any given period. This unit is used to measure and assess

transient noises, i.e. gun shots, individual vehicles, etc.

Sharps Redmore Partnership The White House London Road Copdock Ipswich IP8 3JH

Telephone: (01473) 730073

Fax: (01473) 730030 www.sharpsredmore.co.uk

Documents

Beeston, Lane, Oldbtckstorage.blob.core.windows.net/site1015/Tesco...1.1 The Sharps Redmore Partnership Limited (SRP) was instructed by Tesco Stores Limited to undertake an environmental