A17/2a - Volume 2a: Technical Report: Noise and Vibration

A17/2a - Volume 2a: Technical Report: Noise and Vibration

Transport and Works Act 1992

Boston Barrier Order

We are the Environment Agency. We protect and improve the environment.

Acting to reduce the impacts of a changing climate on people and wildlife is at the heart of everything we do.

We reduce the risks to people, properties and businesses from flooding and coastal erosion.

We protect and improve the quality of water, making sure there is enough for people, businesses, agriculture and the environment. Our work helps to ensure people can enjoy the water environment through angling and navigation.

We look after land quality, promote sustainable land management and help protect and enhance wildlife habitats. And we work closely with businesses to help them comply with environmental regulations.

We can’t do this alone. We work with government, local councils, businesses, civil society groups and communities to make our environment a better place for people and wildlife.

Published by:

Environment Agency Horizon House, Deanery Road, Bristol BS1 5AH Email: [email protected] www.gov.uk/environment-agency

© Environment Agency 2014

All rights reserved. This document may be reproduced with prior permission of the Environment Agency.

Further copies of this report are available from our publications catalogue: www.gov.uk/government/publications

or our National Customer Contact Centre: T: 03708 506506

Email: [email protected].

http://www.gov.uk/environment-agency

http://www.gov.uk/government/publications

mailto:[email protected]

A17/2a - Volume 2a: Technical Report: Noise and Vibration iii

Quality Assurance

Approvals

Name Title Date Version

MF Technical Director Acoustics

12/08/2016 1

EL EIA Project Director 12/08/2016 1

Project name Boston Barrier Tidal Project

Project 1B1S reference IMAN001472

Date 12 August 2016

Version number 1

Author DH

EIA Quality Mark

This Environmental Statement, and the Environmental Impact Assessment (EIA) carried out to identify the significant environmental effects of the proposed development, was undertaken in line with the EIA Quality Mark Commitments. The EIA Quality Mark is a voluntary scheme, operated by the Institute of Environmental Management and Assessment (IEMA), through which EIA activity is independently reviewed, on an annual basis, to ensure it delivers excellence in the following areas: EIA Management EIA Team Capabilities EIA Regulatory Compliance EIA Context & Influence EIA Content EIA Presentation Improving EIA practice To find out more about the EIA Quality Mark please visit:

www.iema.net/qmark

http://www.iema.net/qmark

A17/2a - Volume 2a: Technical Report: Noise and Vibration iv

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Boston Barrier Project A17/2a - Volume 2a: Noise and Vibration Assessment Technical Report

Chapter Title Page

Introduction 1 1

1.1 Overview _______________________________________________________________ 1 1.2 The Project ______________________________________________________________ 1 1.3 Purpose of assessment ____________________________________________________ 2 1.4 Report structure __________________________________________________________ 2

Assessment methodology 3 2

2.1 Sources of information _____________________________________________________ 3 2.2 Study area ______________________________________________________________ 3 2.3 Surveys ________________________________________________________________ 3 2.4 Scoping assessment ______________________________________________________ 4 2.5 Approach _______________________________________________________________ 5 2.6 Evaluation of effects – human receptors _______________________________________ 6 2.7 Evaluation of effects – water-borne wildlife ____________________________________ 11

Legislation and planning policy 15 3

3.1 Legislative requirements __________________________________________________ 15 3.2 National policy __________________________________________________________ 15 3.3 Local policy requirements __________________________________________________ 16

Baseline conditions 19 4

4.1 Current conditions _______________________________________________________ 19 4.2 Survey results __________________________________________________________ 20 4.3 Photographs of measurement positions _______________________________________ 21

Impact assessment 23 5

5.1 Introduction ____________________________________________________________ 23 5.2 Construction ____________________________________________________________ 23 5.3 Temporary impacts ______________________________________________________ 23 5.4 Permanent impacts ______________________________________________________ 29 5.5 Mitigation measures ______________________________________________________ 30 5.6 Operation ______________________________________________________________ 32 5.7 Cumulative and in-combination effects _______________________________________ 32 5.8 Climate change _________________________________________________________ 33 5.9 Residual impacts ________________________________________________________ 33

Summary 35 6

References 36 7

Contents


Abbreviations 37 8

Glossary 39 9

Appendices 41

A. Figures __________________________________________________________________________ 43 B. Photographs ______________________________________________________________________ 47 C. Tables ___________________________________________________________________________ 51

Tables

Table 2.1: Inventory of measurement equipment _________________________________________ 4 Table 2.2: Receptor sensitivity _______________________________________________________ 6 Table 2.3: Criteria for assessment of traffic noise _________________________________________ 8 Table 4.1: Noise Receptor Locations _________________________________________________ 19 Table 4.2: Measurement start and end times ___________________________________________ 20 Table 4.3: Summary of the day-time short-term (ST) measurement results and the concurrent

period of the long-term (LT) measurement results at LT __________________________ 21 Table 5.1: Summary of predicted construction noise impacts _______________________________ 27 Table C.1: Indicative plant and equipment ______________________________________________ 51 Table C.2: Enabling works - Wyberton Low Road cable laying ______________________________ 56 Table C.3: Right bank upgrade to highway _____________________________________________ 56 Table C.4: Right bank establishment and utilisation of compound and access road ______________ 57 Table C.5: Right bank compound activities _____________________________________________ 57 Table C.6: Right bank topsoil strip and earthworks _______________________________________ 58 Table C.7: Right bank working platform installation _______________________________________ 58 Table C.8: Right bank steel sheet piling _______________________________________________ 59 Table C.9: Right bank re-instatement _________________________________________________ 59 Table C.10: Tidal dredging Phase 1 - Daytime ___________________________________________ 60 Table C.11: Tidal dredging Phase 1 - Evening ___________________________________________ 60 Table C.12: Tidal dredging Phase 1 – Night time _________________________________________ 61 Table C.13: Tidal dredging Phase 2 - Daytime ___________________________________________ 61 Table C.14: Tidal dredging Phase 2 - Evening ___________________________________________ 62 Table C.15: Tidal dredging Phase 2 – Night time _________________________________________ 62 Table C.16: Tidal dredging Phase 3&4 – Daytime _________________________________________ 63 Table C.17: Tidal dredging Phase 3&4 – Evening _________________________________________ 63 Table C.18: Tidal dredging Phase 3&4 – Night time _______________________________________ 64 Table C.19: River – cofferdam temporary works __________________________________________ 64 Table C.20: Left bank enabling works __________________________________________________ 65 Table C.21: Left bank sheet piling _____________________________________________________ 65 Table C.22: Left bank concreting ______________________________________________________ 66


Table C.23: Left bank concreting ______________________________________________________ 66 Table C.24: Wet Dock Lock earthworks – Night time ______________________________________ 67 Table C.25: Wet Dock Lock concreting - Evening _________________________________________ 67 Table C.26: Wet Dock Lock concreting – Night time _______________________________________ 68

Figures

Figure A.1: Long-term (LT), unattended noise measurement data from position LT1 _____________ 43 Figure A.2: Long-term (LT), unattended noise measurement data from position LT2 _____________ 43


1


1.1 Overview

This Report forms part of the Technical Reports (Volume 2a – 2d) that support the Boston 1.1.1

Barrier Project Environmental Statement (ES) (Volume 1). Volume 2 reports the EIA for the

Project, identifying all the predicted effects, irrespective of their significance. Whereas Volume

1 discusses only those effects, both temporary and permanent, deemed significant under the

EIA regulations.

1.2 The Project

The purpose of the Project is to improve the standard of protection from tidal flooding. The 1.2.1

proposals would not affect the existing standards of fluvial flood protection provided upstream

within the River Witham and South Forty Foot Drain (SFFD). In January 2015 water level

management (WLM) was removed from the scope of this current Project. In making the

decision, the Environment Agency, Lincolnshire County Council (LCC) and Boston Borough

Council (BBC) confirmed that it remains the vision to provide WLM at a later date through a

standalone project and consenting process.

The Project would connect to the existing defences downstream of the town. The Project 1.2.2

would consist of water-based works (the Barrier structure) and land-based work (along the

Haven).

Defences immediately downstream of the barrier structure would be improved to a 1 in 300 1.2.3

standard of protection as a part of the barrier structure works. This level of protection is to

ensure protection against a 0.33% (1 in 300) annual probability of flooding over the 100 year

Project life.

The Project would be constructed south of the town of Boston across the area of the River 1.2.4

Witham known as ‘the Haven’ (see ES (Volume 1): Appendix A; Figure 1.1). It would be

approximately 100m downstream of Black Sluice, adjacent to the Starch Berth (on the Port of

Boston (PoB) estate - left bank) and existing residential properties (along Wyberton Low Road

- right bank).

It should be noted that, references to left and right bank of the Haven are described in a 1.2.5

downstream facing direction. Therefore, the left bank (north side) is on the left side when

facing downstream and the right bank (south side) is on the right side when facing

downstream.

A detailed description of the Project is included in the ES (Volume 1): Chapter 2. 1.2.6

Introduction 1

2


1.3 Purpose of assessment

The purpose of this assessment is to consider the noise and vibration baseline relevant to the 1.3.1

Project and the potential significant issues scoped as part of the Project’s Updated Scoping

Report (2014) (outlined in Section 2.4 of this Report). This includes consideration of the

receptors associated with noise and vibration that could be affected during both construction

and environmental receptors associated with the proposed construction and operation of the

Project.

The Report assesses the Project’s potential noise and vibration impacts affecting both human 1.3.2

and ecological receptors during the construction and operational phases (Please see ES

(Volume 2b) Ecology and Nature Conservation for more detail. The potential impacts and

effects within the study area have been considered so that any requirements for appropriate

mitigation measures can be identified and incorporated into the Project design.

1.4 Report structure

This assessment comprises the following key sections: 1.4.1

Methodology: Outlines the methodology employed to carry out the assessment;

Legislation and planning policy: outlines the key legislation, guidance and polices relevant

to the area and to the Project;

Baseline conditions: Presents the baseline local noise and vibration environmental

conditions. Results of the existing baseline noise and vibration levels are reported;

Works affecting baseline conditions: Provides an assessment of potential impacts of the

Project on the noise and vibration environment;

Mitigation (and prediction of effect): Sets out the likely effects on the local and wider

community during construction and operation and sets out recommendations for mitigation

measures to reduce or eliminate any significant adverse effects identified;

Summary: Describes the predicted impacts following the implementation of mitigation

measures and the extent to which the Project complies with planning and relevant policy;

and

References: Containing the references and source materials relating to the noise and

vibration assessment.

3


2.1 Sources of information

A mixture of desktop study and site surveys were carried out to characterise the existing 2.1.1

baseline conditions relating to noise and vibration.

The following sources of information were used:

Ordnance survey (OS) mapping;

Site surveys; and

Preliminary construction details and methodology.

2.2 Study area

The study area for noise extends 600m around the proposed construction works, as shown in 2.2.1

the Environment Agency’s Updated Scoping Report (2014). This area is typically used in EIA

when considering noise impacts, and is derived from guidance contained in the Design

Manual for Roads and Bridges (DMRB) Volume 11, Section 310.

The corresponding study area for vibration is more localised and primarily dependant on the 2.2.2

nature of the construction works, the furthest extent of which is defined by the activity which

generates the highest level of vibration.

Once construction methods are determined, should construction noise calculations indicate 2.2.3

the potential for significant impacts beyond the proposed study area then this would be

extended to ensure that all significant impacts are identified.

Based on the location of the Project, the study area also includes potential estuarine and 2.2.4

marine receptors. This was required in order to allow an assessment of the impacts of the

construction and operational works on these receptors. See ES (Volume 2b): Ecology and

Nature Conservation Technical Report for more detail.

2.3 Surveys

Noise surveys were carried out at sensitive receptors, the locations of which are presented in 2.3.1

Appendix A: Figure 2.1 of this Report and outlined in Section 4.1. All measurements were

carried out by consultants competent in environmental noise monitoring, and completed in

accordance with the principles of British Standards (BS) 7445-20031. All noise measurement

equipment used during the noise survey was designed to be in conformance with the IEC

61672-12 to the requirements of the Class 1 standard. An inventory of the measurement

equipment is presented in Table 2.1 below.

1 British Standards Institute, 2003. British Standard 7445: (2003) Description and measurement of environmental noise. HMSO.

2 International Electro-technical Commission, 2003.Standard 61672: (2003) Electroacoustics. Sound level meters.

Assessment methodology 2

4


Table 2.1: Inventory of measurement equipment

Item Make and model Serial number Calibrated

Calibrator Larson Davis CAL200 5132 August 2014

Sound level meter 1 Larson Davis 820 1698 June 2014

Sound level meter 2 Larson Davis 831 2162 June 2014

Source: Mott MacDonald 2016

All meters and field calibrators used held current calibration certificates obtained under 2.3.2

laboratory conditions traceable to UK and International Standards. Before and after each

measurement session, the sensitivity of the sound level meter was checked using a field

calibrator. Variation of no more than 0.2 decibels (dB) in the reference level was identified

across any measurement session.

At each position, the microphone was supported using a tripod at a height of 1.5m above local 2.3.3

ground or floor level, and was fitted with a windshield suitable for outdoor use.

2.4 Scoping assessment

The scoping process for this Project has been carried out using information from Original 2.4.1

(2011) and Updated Scoping Reports (2014) and professional judgement, based on our

understanding of the baseline conditions and how the Project will be constructed and

operated.

An Updated Scoping Opinion request was submitted to the Secretary of State for the 2.4.2

Department of Environment, Food and Rural Affairs (Defra) by the Environment Agency in

October 2014. Where significant effects were identified in the Updated Scoping Report (2014)

these have been taken forward for further consideration within this ES and are discussed

below. There were no comments on noise and vibration in the Scoping opinion from Defra.

The EIA includes assessment of the following potential environmental issues associated with 2.4.3

noise and vibration:

The land based elements include: 2.4.4

Increase in noise and vibration levels as a result of construction activities at the Wet Dock

Entrance and associated haulage resulting in disturbance to residents and other sensitive

receptors; and

Temporary increase in noise and vibration levels as a result of construction activities for

example piling resulting in disturbance to residents and other sensitive receptors. Increase

in noise as a result of landscaping activities, resulting in disturbance to residents of

Wyberton Low Road and Lealand Way Industrial Estate.

Part 1: Specifications.

5


The in-channel elements include: 2.4.5

Potential noise impact on local residents as a result of the operation of the barrier

structure; and

Potential noise and vibration impacts on marine receptors.

The issues identified in the Updated Scoping Report (2014) that are unlikely to result in a 2.4.6

significant effect have been scoped out. Justification for this is provided in that report and

these issues are not considered any further in this assessment.

2.5 Approach

The purpose of this Report is to identify potential temporary and permanent noise and 2.5.1

vibration impacts associated with the Project, during the construction and operational phases.

Part of the assessment process is to identify measures to reduce and eliminate significant

adverse effects.

Potential construction noise and vibration impacts include: 2.5.2

Enabling works (along Wyberton Low Road);

Construction of the Project;

Site haulage traffic using public roads and the Haven and accessing the works areas and

contractor’s compounds;

Dredging operations (via barges) maximising two tidal cycles (across 24 hours) across

four phases; and

Activities within the construction compounds (on both left and right banks).

Potential operational noise impacts associated with the barrier structure and new Wet Dock 2.5.3

Entrance are considered. However, these are not expected to be any more significant than

those associated with the current operation of the port and include:

Routine (monthly) maintenance of barrier, structure;

Storage of noise emitting plant equipment in the control building and Wet Dock Entrance

control building; and

Minor traffic movements (small van/sedan) associated with routine maintenance and

delivery of basic office supplies to the control building.

Impact can be described as a physical change to the baseline environment resulting from the 2.5.4

development. For example, an impact can be an increase in the level of road traffic noise due

to an expected increase in traffic volumes. The consequence of the change to the baseline

environment on any environmental receptor of particular value or sensitivity is defined as the

effect. For example, the impact of increased level of road traffic noise may produce the effect

of increased disturbance in the community.

The assessment of the effects of potential impacts due to noise and vibration generally 2.5.5

comprises some or all the following elements:

6


Identification of potential sources and prediction of noise and vibration impacts likely to be

received at nearby sensitive receptors including dwellings;

Comparison of the predicted impacts with the appropriate criteria for acceptability; and

Consideration of possible mitigation measures and review of effects if appropriate and an

assessment of any residual effects.

2.6 Evaluation of effects – human receptors

Sensitivity

Noise affects people in different ways. This may include factors such as annoyance and sleep 2.6.1

disturbance, enjoyment of quiet spaces, ability to communicate with others, ability to

concentrate at home or at work, participation in social and community activities. As a

consequence, it is not appropriate to consider a single criterion when assessing the value of

an existing noise environment.

Table 2.2 sets out the criteria used in this assessment to determine the sensitivity of a 2.6.2

receptor. The variation in the sensitivity of receptors in terms of environmental impact is

considered by applying different scales to classify magnitude of impact (for example, by using

different scales for daytime and night-time) rather than by varying the assignment of sensitivity

to specific types of receptors.

Table 2.2: Receptor sensitivity

Sensitivity Description Examples of receptors

High Receptors where occupants or activities are particularly susceptible to noise

Residential

Quiet outdoor areas used for recreation

Schools

Hospitals/residential care homes

Places of worship

Medium Receptors moderately sensitive to noise, where it may cause some distraction or disturbance

Offices

Restaurants

Sports grounds where spectator noise is not a normal part of the event and where quiet conditions are necessary (for example golf or tennis)

Low Receptors where distraction or disturbance from noise is minimal

Residences and other buildings not occupied when construction is taking place

Factories and noisy working environments during the daytime

Sports grounds where spectator noise is a normal part of the event


All identified sensitive receptors assessed in this assessment are residential and therefore 2.6.3

would have a high environmental value/sensitivity.

7


Magnitude of impacts

Construction noise - Plant equipment

BS 5228-13 does not define strict criteria to determine the significance of noise impacts. 2.6.4

However, examples of how limits of acceptability have been applied historically and some

examples of assessing significance are provided. ‘Example Method 2 – 5dB(A) change

(Annex E ‘Significance of Noise Effects’ Section E.3.3) has been adopted for the assessment

of effects at sensitive receptors as this approach considers the expected changes in ambient

noise levels and better reflects conventional EIA methodologies compared with the use of

fixed/absolute noise limits.

Construction noise levels are deemed to be significant, in accordance with BS 5228, if: 2.6.5

Total noise (pre-construction baseline noise plus construction noise) exceeds the pre-

construction baseline noise by 5dB or more, subject to lower cut-off values of 65dB

(daytime), 55dB (evening) and 45dB LAeq (night-time); and

Duration of construction noise exceeds one month, unless works of a shorter duration are

likely to result in significant impact.

The day-time period is defined as 07:00 to 19:00; the evening period as 19:00 to 23:00 and 2.6.6

the night-time period as 23:00 to 07:00 as defined in BS 5228.

Construction traffic

Table 2.3 sets out the scale for changes in noise levels perceptible to humans. The Design 2.6.7

Manual for Roads and Bridges regards a change in road traffic noise of 1 dB LA10,18h in the

short term (e.g. when a project is opened) to be the smallest that is considered perceptible,

with the magnitude of impact increasing incrementally. This is conventionally applied to road

traffic noise. As construction traffic would form part of general traffic on the public highway,

impacts from construction traffic would also be considered in the context of existing traffic

noise using criteria in Table 2.3.

3 British Standards Institution (2014iii) British Standard 5228-1:2009+A1:2014 Code of Practice for Noise and

Vibration Control on Construction and Open Sites

8


Table 2.3: Criteria for assessment of traffic noise

Change in level dB(A) Magnitude of impact

Short-term

0-1 No impact

>1 Negligible

1<3 Minor

3<5 Moderate

>5 Major


Construction vibration

Vibration arising from construction activities is generally ground-borne. In the case of typical 2.6.8

earthworks projects, it may be generated by operations such as ground compaction, piling

and the movement of vehicles over irregular surfaces. The magnitude of vibration is

expressed in terms of peak particle velocity (ppv) in millimetres per second (mm/s).

BS 5228 – 2 provides guidance on the effect of vibration and the likelihood this would cause 2.6.9

complaint and cosmetic damage to buildings. BS 5228 – 2 does not indicate whether

particular vibrations are significant. The standard states:

“Vibrations above these levels [0.14mm/s to 0.3mm/s] can disturb, startle, cause annoyance

or interfere with work activities. At higher levels they can be described as unpleasant or even

painful. In residential accommodation, vibrations can promote anxiety….”

BS 5228 – 2 provides the following guidance on effects at various vibration levels: 2.6.10

Vibration level of 0.14mm/s – vibration might be just perceptible in the most sensitive

situations for most vibration frequencies associated with construction;

Vibration level of 0.3mm/s – vibration might be just perceptible in residential

environments;

Vibration level of 1.0mm/s – “It is likely that vibration of this level in residential

environments would cause complaint, but can be tolerated if prior warning and

explanation has been given to residents”; and

Vibration level of and over 10mm/s – vibration is likely to be intolerable for any more than

a very brief exposure to this level.

BS 7385:19934 ‘Evaluation and Measurement for Vibration in Buildings Part 2: Guide to 2.6.11

damage levels from ground-borne vibration’ provides guidance on the levels of vibration that

would be necessary to cause structural damage to commercial and residential buildings. The

4 BS 7385-1:1990 ISO 4866:1990 Evaluation and measurement for vibration in buildings

9


standard indicates that continuous PPVs of more than about 7 mm/s would cause structural

damage to residential buildings.

Operational noise

BS 41425 Methods for rating and assessing industrial and commercial sound provides 2.6.12

guidance on assessing new industrial noise sources in mixed use commercial and residential

areas. BS 4142 2014 outlines that where the rating noise level due to new industrial sound

does not exceed the background sound level LA90T, it is an indication of the specific sound

source having a low impact.

The Project is not expected to generate any significant change in traffic volumes along the 2.6.13surrounding road network and significantly affect the existing noise environment.

Operational vibration

General maintenance would be required for the barrier structure. However, this would be 2.6.14

carried out on a periodic basis and not expected to generate any discernible vibrational

impacts on sensitive receptors.

Significance of effects

The NPPF6 require that the assessment considers the significant effects on the sensitive 2.6.15

noise and vibration receptors resulting from predicted noise and vibration impacts. The

concept of Lowest Observed Adverse Effect Level (LOAEL) and Significant Observed

Adverse Effect Level (SOAEL), introduced by NPSE7 and further explained in NPPG

8, have

been defined for the Project based upon noise insulation threshold levels, WHO9 guidance,

and, for construction noise and vibration, guidance from BS5228 Parts 1 and 2.

Residual effects would be considered significant only when, with incorporated mitigation, they 2.6.16

exceed SOAEL. However, to address the second aim of NPSE, where impacts lie between

LOAEL and SOAEL, reasonable steps to mitigate and minimise adverse effects on health and

quality of life should be taken. This assessment considers adverse impacts which are

identified to occur between LOAEL and SOAEL. For this assessment, impacts are regarded

as adverse where they are identified as “moderate” or “major”.

The following sections set out LOAEL and SOAEL for each of the assessments described 2.6.17

above.

5 BS 4142:2014 Methods for rating and assessing industrial and commercial sound

6 Department for Communities and Local Government (2012) National Planning Policy Framework

7 Department for Environmental Food and Rural Affairs (2010) Noise Policy Statement for England

8 National Planning Policy Guidance (NPPG) [DCLG, 2014]

9 The World Health Organization (1999) Guidelines for Community Noise, Europe.

10


Construction noise

BS5228 Example method 2 (referred to above) states: 2.6.18

“Noise levels generated by construction activities are deemed to be significant if the total (pre-

construction ambient noise plus construction noise) exceeds the pre-construction ambient

noise by 5dB or more, subject to lower cut-off values of 65dB, 55dB and 45dB LAeq,Period, from

construction noise alone, for the daytime, evening and night-time periods respectively and a

duration of one month or more, unless works of a shorter duration are likely to result in

significant impact”

Therefore, LOAEL and SOAEL values for construction noise have been determined as 2.6.19

follows:

LOAEL will be regarded as an external noise level of 50dB LAeq,16hour during day-time and

evening consistent with the threshold for moderate annoyance;

LOAEL will be regarded as a noise level of 45dB LAeq,8hour during the night-time consistent

with the threshold for sleep disturbance from the WHO Guidelines for Community Noise;

and

SOAEL will be regarded as a total noise level (pre-construction ambient plus construction

noise) at the noise of 65dB LAeq,T during the day-time, 55dB LAeq,T during the evening and

45dB LAeq,T at night.

Construction traffic flow

Noise from construction-related traffic on the road network will be assessed in the same 2.6.20

context as operational traffic noise.

LOAEL for the construction traffic noise assessment based upon the Design Manual for 2.6.21

Roads and Bridges (DMRB) methodology is defined as a free-field level of 50dB LAeq18hour

during day time consistent with the threshold for moderate annoyance, from the WHO

Guidelines for Community Noise. Note that the time base has been modified to 18hours to

align with the CRTN10

.

LOAEL for the night-time construction traffic noise assessment is defined as a free-field level 2.6.22

of 45dB LAeq,8hour during the night-time consistent with the threshold for sleep disturbance from

the WHO Guidelines for Community Noise. Note that the time base has been modified to 6

hours to align with the CRTN assessment methodology.

Construction traffic noise effects due to the Project would predominantly result from changes 2.6.23

in vehicular traffic noise due to changes to the road network. Therefore, SOAEL for

10 Department of Transport (1988) Calculation of Road Traffic Noise. Department of Transport, Welsh Office, London

11


construction traffic noise will be based upon the “specified noise level” from the Noise

Insulation Regulations 1975 and will be 67.5dB LA10(18hour).

Construction vibration

Vibration from construction activities would generally be temporary and intermittent in nature. 2.6.24

On this basis, in this assessment a PPV of 1.0 mm/s or more is considered to result in a

significant adverse impact.

LOAEL is defined as a PPV of 0.14mm/s, and be just perceptible in the most sensitive 2.6.25

situations for most vibration frequencies associated with construction.

SOAEL is defined as a PPV of 1.0 mm/s or more, lasting for a minimum of one hour during 2.6.26

the normal hours of working.

Operational noise

Although not defined in terms of LOAEL and SOAEL, BS4142 defines impacts in terms of 2.6.27

noise change (as defined by the rating level) with respect to the background noise level:

A difference of around +10 dB or more is likely to be an indication of a significant adverse

impact, depending on the context.

A difference of around +5 dB 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 sound level, the less likely it

is that the specific sound source 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.

2.7 Evaluation of effects – water-borne wildlife

Introduction

Underwater sound may be characterised by frequency, duration, amplitude and impulsiveness 2.7.1

(all of which are features of the sound-causing activity), and may be described using different

metrics.

The reactions of receptors to these characteristics vary depending on the location of the 2.7.2

activity. Different species respond to different frequencies and different responses in marine

life are triggered by different characteristics of the sound energy - for example impulsiveness,

cumulative exposure, sound pressure level and frequency content.

12


Some species of fish respond more to particle velocity rather than pressure level. 2.7.3

Mechanism

In order to drive piles into the ground, energy is applied. Energy dissipated as sound and 2.7.4

vibration reaches underwater regions through:

Radiation of pile casing into air then to water;

Radiation of pile casing directly into water; and

Through the ground as compressive, shear and surface waves which result in particle

motion at the interface between ground and water.

Propagation of waves through the water and surrounding ground is complex and accurate 2.7.5

modelling is extremely difficult to achieve owing to the number of variables.

Criteria

Recent interim criteria for fish have been proposed by Popper et al. (2006)11

based on a 2.7.6

review of available data on the effects of impulse noise on fish. Those criteria identified

threshold of impact sound pressure levels of 208dB re 1µPa and 187dB re 1µPa accumulated

sound exposure level (SEL) for all listed fish except those that are less than 2 grams. In the

latter case, the criterion for the accumulated sound exposure level was identified as 183dB re

1µPa. Details of the methodology and potential impacts on water-borne wildlife are covered in

ES (Volume 2b) Ecology and Nature Conservation Technical Report; Chapter 5.

Popper et al. (2006) noted that criteria should also be based on fish behaviour – some fish 2.7.7

would be expected to swim away, while others are less mobile and would be exposed for

longer durations.

The above criteria were subsequently amended for impact driven piling and are expressed in 2.7.8

terms of sound pressure level (SPL):

Non-auditory tissue damage cumulative, criterion of 183dB SEL to 213dB SEL, sliding

scale corresponding to fish mass between 0.5 and 200g;

Auditory tissue damage 189 to 213dB SEL Accumulated;

Temporary threshold shift 185dB SEL Accumulated;

Where very small fish were present (<0.5g), where present, the cumulative 183dB SEL

criterion would prevail most; and

The most stringent peak SPL criterion for all hearing generalist fish for all types of effects

is 206dB Peak.

The amended thresholds for injury from impact driven piling may be simplified to: 2.7.9

206dBPeak and 189dB SEL Accumulated. Although the latter value is likely to become

187dB SEL Accumulated.

11 The effects of anthropogenic sources of sound on fishes (2006) A. N. Popper and M. C. Hastings

13


For vibratory pile driving thresholds are: 2.7.10

187 to 220dB SEL Accumulated.

Behavioural thresholds are: 2.7.11

150dB RMS.

The assessment of underwater noise is complex, details of the methodology and potential 2.7.12

impacts on water-borne wildlife are covered in the ES (Volume 2b): Ecology and Nature

Conservation Technical Report, together with potential mitigation options where appropriate.

14



15


3.1 Legislative requirements

This assessment has been informed by legislation, and guidance as follows: 3.1.1

The National Planning Policy Framework (NPPF) 2013;

The Noise Policy Statement for England (NPSE) 2010;

Planning Practice Guidance - Noise (2014);

South East Lincolnshire Local Plan 2011-2036;

Boston Interim Plan (Non-Statutory Development Control Policy) 2006

Boston Borough Local Plan 1999 (saved policies);

Planning Noise Advice Document Sussex, March 2013; and

World Health Organisation (WHO) ‘Guidelines for Community Noise’.

3.2 National policy

National Planning Policy

The National Planning Policy Framework

The National Planning Policy Framework (NPPF) came into force in March 2012. 3.2.1

Paragraph 109 of the NPPF states that: “the planning system should contribute to and 3.2.2

enhance the natural and local environment by: ...preventing both new and existing

development from contributing to or being put at unacceptable risk from, or being adversely

affected by unacceptable levels of soil, air, water or noise pollution or land instability”.

Paragraph 123 of the NPPF states that planning policy and decisions should aim to: 3.2.3

Avoid noise from giving rise to significant adverse impacts on health and quality of life as

a result of new development;

Mitigate and reduce, to a minimum, other adverse impacts on health and quality of life

arising from noise from new development, including through the use of conditions;

Recognise that development would often create some noise and existing businesses

wanting to develop in continuance of their business should not have unreasonable

restrictions placed on them because of changes in nearby land uses since they were

established; and

Identify and protect areas of tranquillity which have remained relatively undisturbed by

noise and are prized for their recreational and amenity value for this reason.

Noise Policy Statement for England

The Noise Policy Statement for England (NPSE) was issued by the Department for the 3.2.4

Environment, Food and Rural Affairs (Defra) in 2010. Its purpose is to promote ‘good health

and a good quality of life through the effective management of noise within the context of

Government policy on sustainable development’.

Legislation and planning policy 3

16


The three main aims are to: 3.2.5

Avoid significant adverse impacts on health and quality of life from environmental,

neighbour and neighbourhood noise within the context of Government policy on

sustainable development;

Mitigate and minimise adverse impacts on health and quality of life from environmental,

neighbour and neighbourhood noise within the context of Government policy on

sustainable development; and

Where possible, contribute to the improvement of health and quality of life through the

effective management and control of environmental, neighbour and neighbourhood noise

within the context of Government policy on sustainable development.

The NSPE refers to the two established concepts from toxicology that are currently being 3.2.6

applied to noise effects by the WHO. The NPSE further extends these concepts to include a

third concept. The three concepts are listed below;

NOEL – (No Observed Effect Level); the level at which no effect can be detected.

LOAEL – (Lowest Observed Adverse Effect Level): the level at which adverse effects on

health and quality of life can be detected; and

SOAEL – The level at which significant adverse effects on health and quality of life will

occur.

It is noted that the NPSE refers to a situation where the effect lies somewhere between 3.2.7

LOAEL and SOAEL. It states that it aims “all reasonable steps should be undertaken to

mitigate and minimise adverse effects on health and quality of life while also taking into

account the guiding principles of sustainable development. This does not mean that such

adverse effects cannot occur”.

3.3 Local policy requirements

South East Lincolnshire Local Plan 2011-2036

It has been noted that the South East Lincolnshire Local Plan 2011-2036 was submitted as a 3.3.1

draft for Public Consultation between January and April 2016. As this Plan is still a draft, it

currently carries a limited material weight, but for reference the polices relevant to this Report

are outlined below:

Development management;

Strategic approach to flood risk;

Pollution; and

Climate change and renewable and low carbon energy.

Boston Interim Plan (Non-Statutory Development Control Policy) 2006

The replacement Local Plan prepared by BBC was withdrawn from the statutory adoption 3.3.2

process in 2006. A revised version of the replacement local plan for development control

purposes is known as the Interim Plan (Non-Statutory Development Control Policy). Little or

17


no material weight can be given to the policies of the Interim Plan for the purposes of

determining an application, due to the significant objections to the first draft and re-deposit

draft Local Plan stages. This Plan has therefore not been assessed.

Boston Borough Local Plan 1999 (saved polices)

The Boston Borough Local Plan was adopted in April 1999. In accordance with the provisions 3.3.3

of the Planning & Compulsory Purchase Act 2004, the Secretary of State agreed that some of

the policies in the adopted local plan should be saved. All other policies in the adopted Local

Plan 1999 were not saved and therefore no longer have any consideration in planning policy

terms. Those policies related to noise and vibration are as follows:

Economic development policies (Policy ED1);

Economic development policies (Policy ED2); and

Recreation and leisure policies (Policy R4).

Standards and guidance

The assessment makes reference to standards and guidance documents, deemed relevant 3.3.4

for this assessment, as follows:

British Standard 5228 Code of practice for noise and vibration control on construction and

open sites – Part 1: Noise; 2014;

BS 5228 Code of construction practice for noise and vibration control on construction and

open sites – Part 2: Vibration; 2014;

BS6472 Guide to evaluation of human exposure to vibration in buildings Part 1: Vibration

sources other than blasting;

British Standard 7385:1993’ Evaluation and measurement for vibration in buildings Part 2’

Guide to damage levels from ground-borne vibration’;

British Standard 4142:2014 Methods for rating and assessing industrial and commercial

sound;

Design Manual for Roads and Bridges (DMRB);

IEMA Guidelines for Environmental Noise Impact Assessment; and

World Health Organisation (WHO) ‘Guidelines for Community Noise’.

18



19


4.1 Current conditions

A baseline noise survey was carried out to establish the ambient noise climate. 4.1.1

The nearest sensitive noise receptors were identified and representative noise measurement 4.1.2

positions defined, as indicated in Appendix A: Figure 2.1 of this Report. Details for each of the

noise receptors are listed in Table 4.1.

Table 4.1: Noise Receptor Locations

Receptor ID Location

1 Wyberton Low Road

2 Wyberton Low Road

3 Wyberton Low Road

4 Wyberton Low Road

5 Wyberton Low Road and Marsh Lane

6 Marsh Lane and Marsh Avenue

7 Victoria House / Lealand Way Industrial Estate

8 The Featherworks

9 The Featherworks

10 Windsor Bank

11 Alfred Street

12 Skirbeck Road

13 Bath Gardens

14 London Road


Baseline noise surveys were carried out between 19 March and 25 March 2015 and between 4.1.3

28 September and 5 October 2015. The surveys comprised long-term, unattended

measurements (LT1 + LT2) and short-term, attended measurements at three positions (ST1,

ST2 and ST3) around the Project.

A baseline vibration survey to establish the existing level of ground-borne vibration was not 4.1.4

undertaken since any assessment would be based upon exceedance of criteria rather than

change in vibration, and there are no existing significant sources of vibration.

All sound level meters were configured to record the following parameters as a minimum: 4.1.5

A-weighted equivalent continuous noise level LAeq,T;

Statistical descriptor LA01, defined as the A-weighted sound pressure level exceeded for

1% of the measurement interval;


10% of the measurement interval;

Baseline conditions 4

20



90% of the measurement interval; and

Maximum A-weighted sound pressure level with the fast time-weighting (LAmaxF).

All of the sound level meters were configured to record these and other parameters over 4.1.6

contiguous 5-minute intervals except for the long-term unattended position, where 15-minute

intervals were used. Table 4.2 presents the start and end times of the measurements at each

position.

Table 4.2: Measurement start and end times

Position Dates Start time End time

ST1 25 March 2015 12:16

13:21

12:31

13:36

ST2 25 March 2015 12:38

13:45

12:53

14:00

ST3 25 March 2015 12:57

14:40

13:12

14:55

LT1 19 March 2015 -

25 March 2015

15:45 14:05

LT2 29 September 2015 -

5 October 2015

12:15 13:45


The noise climate at the long-term measurement positions LT1 and LT2 were dominated by 4.1.7

road traffic on the surrounding road network, intermittent noise contribution from the nearby

port and local residents speaking to neighbours, emptying recycling bins and accessing their

cars.

The existing noise climate during the daytime at the various short term (ST) measuring 4.1.8

positions around location of barrier structure typically comprised of road traffic noise from

London Road and the local road network. There were also contributions from pedestrians

walking and talking nearby, cars reversing near the measurement location, car door slams,

birdsong and dog barking.

The weather conditions were dry, the temperature varied around 9°C and wind speeds 4.1.9

remained less than 5m/s during the survey periods. These conditions were considered to be

suitable for noise measurement.

4.2 Survey results

The results of the long-term measurement positions are presented in Appendix A: Figure A.1 4.2.1

and A.2 of this Report.

21


Table 4.3 summarises the results of the short-term noise surveys at positions ST1, ST2 and 4.2.2

ST3. Where available, the results of the concurrent measurements at LT1 are also presented.

In cases where the measurement start times do not match precisely, the closest 15-minute

measurement from the unattended measurement position has been taken. All values have

been averaged over 15-minute intervals of the short-term measurements.

Table 4.3: Summary of the day-time short-term (ST) measurement results and the concurrent period

of the long-term (LT) measurement results at LT

Position Start date and time ST measurement results LT measurement results

LAeq, 15min LAFmax,

15min LA90,

15min

LAeq, 15min LAFmax,

15min LA90,

15min

ST1 25/03/15 12:16 60.5 74.1 49 42.4 55.6 37

25/03/15 13:21 63.7 80.5 50 46.7 64.2 40

ST2 25/03/15 12:38 47.3 63.7 42 40.4 53.9 36

25/03/15 13:45 47.3 66.7 39 47.7 79.1 36

ST3 25/03/15 12:57 50.8 69.3 41 46.1 68.5 40

25/03/15 14:40 46.3 66.1 41 - - -


4.3 Photographs of measurement positions

Photographs of the long-term, unattended noise measurement positions LT1 and LT2 along 4.3.1

with short term attended measurement positions ST1, ST2 and ST3 are presented in

Appendix B: Photographs B.1 to B.5 of this Report.

22



23


5.1 Introduction

The predicted noise and vibration effects of the Project on sensitive receptors are addressed 5.1.1

in this section. The assessment is split into two sections; construction effects and operational

effects. Construction effects can be temporary, however some works carried out as part of the

construction could result in permanent effects.

The predicted operational effects will assess the noise and vibration effects through the 5.1.2

operation of the Project. It will include the effect of the barrier structure on other Project

components when they are in use.

5.2 Construction

Assessment assumptions and limitations

This assessment has been carried out using the Project design and construction methods 5.2.1

described in the ES (Volume 1): Chapter 2. The following assumptions have been made:

Construction would be carried out in line with best practice;

Construction would be limited to between Monday and Friday (07:30 to 18:30), except for

construction associated with the Wet Dock Entrance and dredging operations where

construction would be 24 hours/7 days;

Construction noise would be carefully monitored during construction to minimise impacts

on the local area;

Piling works would only take place during the day time between 07.30 and 18.30;

During construction works, the PoB would continue operating; and

Normal tidal activity would continue in the Haven during the construction period.

Assessment methodology has been based upon BS5228. Results are indicative of potential 5.2.2

noise impacts during construction and it should be noted that detailed analysis can only be

carried out when precise details of works are available in terms of equipment, processes, and

timings. Once appointed, the Contractor would be obliged to provide this information, along

with more detailed calculations, to the Environmental Health Officer (EHO) as part of the

Section 61 process, whereby formal consent is given to working methods.

5.3 Temporary impacts

Construction activities

The main construction activities associated with the Project would comprise of: 5.3.1

(Enabling works) – re-cabling power lines along Wyberton Low Road;

New access roads on the left and right banks;

Topsoil stripping;

Construction of working platforms;

Impact assessment 5

24


Steel sheet piling and new flood walls;

Backfilling and concreting;

Construction of barrier structure;

Construction and deconstruction of cofferdams, barrier structure and Wet Dock Entrance;

Construction of relieving platform;

Construction of the flood embankment along the right bank;

Widening of Wet Dock Entrance (24 hours/7days);

Construction of a new Wet Dock Entrance (24 hours/7 days);

Construction of a barrier control building and WDE control building;

Dredging (across 4 phases and barges maximising high tide conditions); and

Construction workforce – traffic to and from the Project area.

Plant equipment

Plant and equipment required for each construction activity is shown in Appendix C: Table C.1 5.3.2

of this Report, including the quantity of equipment per activity and the approximate duration of

time in use (% on-time). The majority of construction works would be confined to daytime

periods only, with the exception of tidal dredging and the construction associated with the Wet

Dock Entrance. Dredging would take place across 4 phases and would only take place during

periods of low tide. This restriction would therefore potentially include works during the

evening and night time periods where water levels are suitable for dredging to take place.

There would be no change to the usual PoB maintenance dredging.

Steel sheet piling would be required along the left and right bank of the Haven and around the 5.3.3

barrier structure. This work would be undertaken for relatively short periods during the mid-

part of the working day. Due to the inconsistent data on existing ground conditions to install

sheet piling, it was assumed that the principal method to install sheet piles would be

percussive piling which is considered the worst case scenario. However, if alternative quieter

sheet piling methods are practically possible the construction noise and vibration assessment

would be reviewed.

Noise levels for construction plant and equipment have been assigned based upon the 5.3.4

reference levels provided in Annex C of BS 5228-1(2009+A1:2014).

Appendix C: Tables C.2 to C.26 of this Report summarise the predicted noise effects at the 5.3.5

representative noise sensitive receptors within the study area during each phase of work.

Noise levels above 65dB are deemed as significant during the day time. Where construction is

carried out during the evening and or night time periods, noise levels above 55dB and 45dB

respectively are considered to be significant.

For construction activities where calculations at the nearest sensitive receptors clearly 5.3.6

indicate no significant impact, assessment at receptors further away were not considered.

25


Summary of predicted noise effects

The assessment has shown that there is the potential for noise levels to exceed SOAEL 5.3.7

threshold levels set for construction plant noise. This is for one or more residential properties

during all construction phases with the exception of works to the left bank enabling works,

concreting and piling. Effects during works to the left bank in particular are reduced due to the

greater distance between the construction activity and noise sensitive receptors. Significant

effects are deemed to occur where both SOAEL threshold levels are exceeded and the

construction activity is expected to take place for a period of one month or longer.

In particular, works along the right bank and cofferdam have the potential for significant 5.3.8

adverse effects due to the noise levels predicted together with the duration of the works likely

to exceed one month. In addition, Phase 1 & 2 dredging and the construction associated with

the Wet Dock Entrance have the potential for significant adverse effects particularly during the

evening and night time periods where threshold effect levels are lower. Where noise

increases fall within the requirement to mitigate in order to ‘mitigate and minimise adverse

impacts’ methods outlined in Section 6.5 shall be applied to construction works.

Enabling works - Right bank

Enabling works associated with cable laying indicated in Table C.2 are predicted to have 5.3.9

significant adverse effects for residents on Wyberton Low Road. Noise levels are predicted to

exceed the SOAEL and in addition, works are expected to take up to 2 months to complete.

Calculations of noise levels assume all plant would operate simultaneously, however this

would not occur as activities are sequential, thus resulting impacts would be lower than

predicted. Minimising the quantity of plant equipment and the percentage of operating time

would not completely remove the likelihood of significant adverse effect caused, but the

magnitude of the impact is likely to be reduced. In addition, given that cable laying would be a

transient activity, individual properties would not be exposed to levels above the SOAEL for

extended periods of time (more than a month) as construction activity moves along the Project

Area.

Dredging activities

Phase 1 and Phase 2 dredging works are scheduled to take place for a total of 9-12 weeks 5.3.10

with the duration of Phase 1 predicted to last between 3-4 weeks and Phase 2, 6-8 weeks.

Noise levels during Phase 1 dredging are predicted to exceed SOAEL at the nearest residents

to the west (London Road) and to the south (Wyberton Low Road) and have temporary

significant adverse effects based on the calculated noise levels given in Appendix C of this

Report. Predicted noise levels due to dredging works are calculated based on the shortest

distance between the works and the nearest properties to determine a worst case noise level

at each receptor. Due to the nature of dredging, the location of the works would move to other

parts of the Phase 1 works area during operation and the distance to the nearest receptor

would increase. As the distance increases the noise level at the receptor would be reduced

26


and thus the daytime noise levels at the nearest properties may not exceed SOAEL for a

period of a month or more. However during the evening and night time periods, due to the

lower SOAEL threshold, noise levels are still likely to exceed SOAEL for periods up to a

month at the nearest sensitive properties. Phase 1 dredging is not predicted to have

significant effects on residents to the north and east of the Project Area at any period of the

day or night.

Noise levels due to Phase 2 dredging works are predicted to exceed SOAEL during the 5.3.11

evening and night time at the nearest sensitive receptors and have temporary significant

adverse effects based on the calculated noise levels given in Appendix C of this Report.

Predicted noise levels due to dredging activities are calculated based on the shortest distance

to the nearest receptors which would be reduced when works are taking place in other areas

of the Phase 2 works area. However during the evening and night time periods, due to the

lower SOAEL, noise levels are still likely to exceed SOAEL for a period of a month or more at

the nearest sensitive properties. Significant adverse effects are not predicted during Phase 2

dredging during the daytime.

Phases 3 and 4 dredging works during the evening and night time periods are predicted to 5.3.12

exceed SOAEL and have temporary significant adverse effect on residents to the west

(London Road) and south (Wyberton Low Road). Phase 3 is predicted to take 2-3 weeks to

complete and Phase 4 is predicted to take 1-2 weeks to complete therefore individual

properties would not experience noise levels above SOAEL for more than a month. Phases 3

or 4 dredging are not predicted to have significant effects to residents to the north and east of

the Project Area at any period of the day or night.

Wet Dock Entrance construction activities

The construction associated with the Wet Dock Entrance would consist of the widening of the 5.3.13

existing northern entrance wall and installation of new dock gates. The widening of the

entrance would include earthworks to the existing river bank, sheet piling and concreting to

the widened Wet Dock Entrance. The strategy for sheet piling from the Environment Agency is

that piling works would only take place during the day time; therefore this has not been

assessed during the evening and night time periods. Earthworks and concreting taking place

during night time have the potential for significant adverse effect on the nearest residents to

the Wet Dock Entrance construction area (Windsor Bank and The Featherworks). Fewer

significant adverse impacts are expected during the evening. Residential properties over

300m away from the Wet Dock Entrance construction works are not expected to experience

any significant adverse effects during the evening or night time construction. Mitigation for

properties nearest the Wet Dock Entrance construction area shall be provide to reduce noise

impacts and is outlined in Section 5.5 of this Report.

27


Sheet piling

The strategy for sheet piling from the Environment Agency is that works would take place 5.3.14

during the day time only and not during the evening or night time. In terms of absolute noise

levels, SOAEL levels resulting from the piling works required for the barrier structure and the

right bank flood wall would be exceeded at residential properties to the south (Wyberton Low

Road). However, in addition to total noise level, in defining significance BS5228 advises

duration in excess of 1 month are necessary. The progress of sheet piling is estimated to

move 10m per day during the construction works. Given that installation of sheet piles would

be sequential, and that none of these activities are static, it is unlikely that noise sensitive

receptors would be exposed to significant impacts for extended periods of time thus not

resulting in significant adverse effects. However, noise increases would fall within the

requirement to mitigate in order to ‘mitigate and minimise adverse impacts’. A noise shroud

would be utilised to mitigate noise from piling activities and is considered in the calculation of

predicted noise levels.

Construction traffic

Predicted noise effects

Table 5.1 summarises the construction noise impacts at each of the selected noise sensitive 5.3.15

receptors.

Table 5.1: Summary of predicted construction noise impacts

Location Predicted existing noise level, LAeq,16h

Predicted worst case range noise levels during construction LAeq,16h

Predicted worst case change LAeq,16h

Wyberton Low Road 44.3 45.8 – 79.1 1.5 - 34.8

Wyberton Low Road and Marsh Lane

44.3 45.7- 68.8 1.4 – 24.5

Marsh Lane and Marsh Avenue

44.3 46.1 – 66.6 1.8 – 22.3

Wyberton West Road and London Road

44.3 45.1 - 61.9 0.8 – 17.6

Bath Gardens 50.3 50.9 – 55.4 0.6 – 5.1

Tower Gardens 50.3 50.6 – 54.9 0.3 – 4.6

Alfred Street 49.3 49.7 – 66.4 0.4 – 17.1


Predictions indicate that there would be temporary noise impacts associated with construction 5.3.16

traffic accessing and egressing from two construction compounds (left and right banks) at

sensitive receptors to the south of the barrier structure, to the east of A16 and along Skirbeck

Road.

28


Based on the figures presented in Table 5.1 there is the potential for significant temporary 5.3.17

effects resulting from construction traffic noise at front-line12

receptors on Wyberton Low Road

where SOAEL of 67.5 dB LAeq,16hrs is exceeded. It should be noted that a range of noise levels

are predicted as result of construction traffic and it is only at the higher end of the predicted

noise level range that is SOAEL exceeded reducing the likelihood of significant effects.

Mitigation measures are outlined in Section 5.5.

Vibration assessment

Assumptions and limitations

In the case of continuous sources of vibration such as traffic, within residential areas there are 5.3.18

wide variations in tolerance, however, vibration can be perceptible at levels as low as around

0.14mm/s.

Higher levels of vibration are typically tolerated for single events or events of short duration. 5.3.19

For example, piling, one of the primary sources of vibration during construction is typically

tolerated at vibration up to 1mm/s.

Summary of predicted vibration effects

BS 5228 – 2:2009+A1:2014, provides empirical relationships for ground-borne vibration 5.3.20

arising from a range of mechanised construction activities (including vibratory compaction).

Appendix A: Figure A.3 presents a graph showing the level of vibration from typical

construction plant expressed as PPV (mm/s) as a function of distance from the works.

In predicting potential vibration impacts due to piling, it is understood that percussive piling 5.3.21

would be used. The closest sensitive receptors to the right bank piling works are

approximately 20m distant. According to Appendix A: Figure A.3, the corresponding level of

vibration at that distance is approximately 1.0 mm/s. This falls at the threshold of SOAEL

outlined in the assessment methodology at which “It is likely that vibration of this level in

residential environments will cause complaint, but can be tolerated if prior warning and

explanation has been given to residents”. With prior warning and on the basis that piling

activities directly adjacent to any given property will be transient (the progress of sheet piling

is estimated to move 10m per day during the construction works) no significant adverse

effects are predicted at closest properties.

Vibration impacts due to plant equipment other than piling have been assessed in accordance 5.3.22

with the threshold criteria set out in Chapter 3. Vibratory rollers are typically used in the

construction of road surfaces. For front-facing sensitive receptors approximately 10m from the

carriageway, from Appendix A: Figure A.3, the corresponding level of vibration would be

approximately 1.5 mm/s. This is above the threshold of SOAEL as outlined in Chapter 3 at

12 Residential properties nearest the road

29


which “It is likely that vibration of this level in residential environments will cause complaint,

but can be tolerated if prior warning and explanation has been given to residents”. However,

due to the short-term nature of the work and the marginal exceedance of SOAEL it is likely to

be tolerated provided that prior notice is given to the occupiers, and unlikely to continue for

more than one hour. Mitigation by the contractor shall be adopting Best Practice in

accordance with the principles of Best Practicable Means (BPM, as defined in BS 5228:2009-

Part 1 Noise), is still recommended and would be applied to construction activities with the

potential to generate vibration impacts in addition to all other on-site construction activities.

Significant adverse effects due to construction vibration are therefore not predicted.

BS 7385:1993 provides guidance on the levels of vibration that would be necessary to cause 5.3.23

structural damage to different types of buildings. This Standard indicates that continuous

PPVs of more than about 7mm/s would be required to cause cosmetic damage to residential

buildings. Therefore, on the basis of the maximum predicted vibration levels above cosmetic

or structural damage at residential buildings would not occur.

5.4 Permanent impacts

Operational effects

Noise

The Project is not expected to result in any significant permanent adverse effects on the noise 5.4.1

environment within the study area. Information provided by the Project team has indicated that

the movement of the tidal barrier structure and new Wet Dock Entrance are not expected to

generate significant noise levels as they would be hydraulically operated.

Routine (monthly) maintenance of the barrier structure would be carried out. Operational 5.4.2

noise associated with the maintenance of the barrier would comprise:

Storage of noise emitting plant equipment in the barrier control building; and

Minor traffic movements (small van/sedan) associated with routine maintenance and

delivery of basic office supplies for the barrier control building.

Plant and equipment associated with the movement of the barrier structure would be stored in 5.4.3

a control building approximately 30m to the north of the left bank within the PoB. This would

be approximately 120m away from the nearest sensitive receptor on Wyberton Low Road.

Equipment used to control the Wet Dock Entrance would be contained inside a control

building near the Wet Dock Entrance. This would be approximately 100m away from the

nearest residential receptor (Windsor Bank).

An internal ambient noise limit for plant machinery inside the control buildings is set at 5.4.4

80dB(A) by the Environment Agency. A glass reinforced plastic composite construction with

acoustic louvres has been specified for the design of the control buildings. Breakout noise

calculations have been carried out at the nearest residential receptor to the control building

30


and kiosk. Calculations indicate that noise levels due to plant machinery inside the control

buildings would be below the existing baseline noise levels during the day and night time.

Therefore, no significant impact from operational noise is predicted.

Vibration

There would be no vibration impact associated with the operational phase of the Project. 5.4.5

5.5 Mitigation measures

Plant and equipment

There would be temporary significant noise impacts at particular phases of works during the 5.5.1

construction period. The Project would implement best practicable means (BPM) as defined in

BS 5228:2009-Part 1 Noise, to all Project Area construction activities. In particular, this would

include selecting lower noise plant and equipment where possible and utilising plant and

equipment fitted with white noise reversing alarms.

A construction noise and vibration management plan would be developed prior to construction 5.5.2

starting and incorporated into the Environmental Action Plan (EAP) within the ES (Volume 1):

Chapter 20. This would set out suitable construction methodologies to be used. It would also

include details on working hours, construction methods and plant and noise limits and

monitoring as appropriate. The noise and vibration management plan would be subject to

approval by the BBC pursuant to the proposed planning condition.

In addition, the Contractor would be required to apply for ‘Prior Consent’ under Section 61 of 5.5.3

the Control of Pollution Act 1974. This process enables the management of noise and

vibration using ‘best practicable means’. This would include provision of hours of work,

methodology, programme, details of plant (including sound power levels), predicted noise and

vibration levels and mitigation measures proposed.

Screening to piling and breaking activities would be provided to significantly reduce noisy 5.5.4

activities. Exact details of locations would be provided once the methodology has been

finalised. Any requirement to operate percussive piling rigs or breakers outside of the

standard working hours of 07:00 to 18:30 Monday to Friday would be agreed with Boston

Borough Council beforehand.

Additional mitigation measures such as individual noise insulation or temporary relocation of 5.5.5

local residents would be considered on a case by case basis if excessive prolongation of

significant noise impacts is envisaged once the construction works commence. BS5228

indicates potential threshold noise levels during construction whereby additional mitigation

such as individual noise insulation or temporary relocation may be applicable.

31


Construction compounds

Construction compounds would adopt the following mitigation measures: 5.5.6

Erection of temporary noise barriers where there are sensitive receptors close to the

proposed works;

Location of appropriate ingress and egress point; and

Implementation of appropriate traffic management plan for the construction compound to

minimise standing traffic.

Consultation and communication

In addition to above mitigation measures identified, further mitigation in the form of timely and 5.5.7

effective stakeholder consultation would be outlined within the environmental action plan. This

would ensure that residents are kept informed of on-going and future operations. For

example, local residents would be informed by letter drop of proposed works, particularly

where these are due to occur outside standard working hours. The letter would include details

of proposed cause, start dates and duration of works to be carried out.

Vibration

BS5228:2009 - Part 2: Vibration includes a range of measures for the reduction of vibration 5.5.8

associated with piling activities and for general surface based activities such as ground

treatment, reducing pile resistance or reducing the energy used for driven piles. The

contractor would adhere to the mitigation measures included in BS5228:2009 where

practicable to reduce vibration levels from general and piling activities to the lowest possible

levels. Given the temporary nature of the works involved it is likely to be tolerated if prior

warning and explanation has been given to residents.

The above conclusions are based upon preliminary information on construction plant. In 5.5.9

addition to prior warning, vibration monitoring must be carried out in order to regulate and

prevent vibration criteria being exceeded.

Although the vibration assessment does not identify any impacts on nearby properties from 5.5.10

the construction works, as a precautionary measure the Environment Agency is committed to

undertake pre-construction structural condition surveys of properties along Wyberton road and

implement remedial measures where necessary.

In addition, technologies such as silent sheet piling which produces less vibration than 5.5.11

conventional piling methods and very low noise levels would be investigated to limit impacts.

In addition, the use of softer alternatives (to hammering) of piling techniques would be used

where ground conditions allow.

32


5.6 Operation

Noise

No operational noise impacts resulting from the operation of the Project are anticipated. 5.6.1

Therefore, no specific mitigation measures are proposed during the Project operation.

Vibration

No operational vibration impacts resulting from the operation of the Project are anticipated. 5.6.2

Therefore, no specific mitigation measures are proposed during the Project operation.

5.7 Cumulative and in-combination effects

Inter-project cumulative effects

The inter-project cumulative effects have been assessed based on the current information 5.7.1

available and a number of assumptions for the Environment Agency schemes. Should the

final designs be different from the assumptions made here, the relevant project/scheme would

revise the potential cumulative effects, as necessary.

There is the potential for cumulative and in-combination effects during construction, should 5.7.2

there be an overlap between different construction activities in the wider area. Based on the

proposed construction plan there is the potential for limited overlap of some construction

activities. Calculations of construction noise have been made using a worst case approach so

that noise levels from each activity are calculated from the nearest point of the construction

works to the location of the receptor. The assessment has shown that where there is the

potential for construction activities to overlap, it is likely that noise from the nearest

construction activity to the respective receptor would be dominant therefore any additional

noise would have a limited impact on the total noise level.

There is also the potential for cumulative effects due to works being carried out in Boston 5.7.3

during the same period of time as the construction of the Project. A number of proposed

residential developments have been identified in the surrounding area with the nearest

development located approximately 230m away from the Project area boundary to the south

west. Given the distance it is unlikely that cumulative effects would be experienced. In

addition, the two sites are separated by a major arterial road and industrial areas from the

Project. Therefore, noise cumulative effects would be negligible during Project construction

and operation and, therefore, cumulative effects would be avoided.

There is the potential for cumulative effects due to proposed works to the existing flood 5.7.4

defence scheme to the east of the Project Area. It is understood that proposals are to raise

the height of the defence from 6.35 to 6.85m. Works begin at the eastern extent of the Boston

33


Barrier Project and would likely tie the two flood defences schemes together. The flood

defence improvements would involve similar construction works to the Boston Barrier Project

including sheet piling and earthworks. At this stage specific information relating to the timing

or duration of the proposed construction works to the flood defence is not known therefore it is

not possible to quantify the potential significance of cumulative impacts.

In-combination cumulative effects

There is the potential for in-combination effects for noise sensitive receptors as a result of 5.7.5

different elements of the Project (see ES (Volume 1): Chapter 19; Cumulative effects for more

information).

5.8 Climate change

It is not anticipated that climate change would alter the noise and vibration assessment of the 5.8.1

Project.

5.9 Residual impacts

Results are indicative of potential noise impacts during construction and it should be noted 5.9.1

that detailed analysis can only be carried out when precise details of works are available in

terms of equipment, processes, and timings. Once appointed, the Contractor would be obliged

to provide this information, along with more detailed calculations, to the EHO as part of the

Section 61 process, whereby formal consent is given to working methods. It is at this time that

the precise level of mitigation can be specified to ensure residual impacts are not significant.

No permanent residual impacts are predicted as a result of the Project. However, some short 5.9.2

term residual impacts during the construction stage of the Project are outlined below.

There is the potential for temporary residual impacts at properties on Wyberton Low Road 5.9.3

during cable laying enabling work represented by receptors 1-5 in Appendix A: Figure 2.1 of

this Report. However, with incorporated mitigation it is considered these impacts would not be

significant.

There is the potential for temporary residual impacts during dredging where carried out during 5.9.4

the night time period at all sensitive receptors with the exception of Bath Gardens indicated as

receptor 13 represented in Appendix A: Figure 2.1 of this Report. However, with mitigation

included it is considered these impacts would not be significant.

There is potential for temporary residual impacts during the construction of the new Wet Dock 5.9.5

Entrance to properties on Windsor Bank and The Featherworks where construction is required

to take place during the night time in particular. With mitigation included it is considered that

these impacts would not be significant.

34


No residual impacts or residual significant effects are predicted for the operational stage of the 5.9.6

Project.

35


The potential for temporary and permanent noise and vibration impacts associated with the 6.1.1

Project have been considered in this assessment.

No permanent significant residual impacts are predicted as a result of the Project; however 6.1.2

some potential short term residual impacts during the construction stage of the Project are

outlined below.

There is the potential for temporary residual effects at properties on Wyberton Low Road 6.1.3

during cable laying enabling work represented by receptors 1-5 in Appendix A: Figure 2.1 of

this Report. However, with mitigation included it is considered these impacts would not be

significant.

There is the potential for temporary residual effects during dredging where carried out during 6.1.4

the night time period at all sensitive receptors with the exception of Bath Gardens indicated as

receptor 13 represented in Appendix A: Figure 2.1 of this Report. However, with mitigation

included it is considered these impacts would not be significant.

There is the potential for temporary residual effects during the construction of the new Wet 6.1.5

Dock Entrance to properties on Windsor Bank and the Featherworks where construction is

required to take place during the night time in particular. However, with mitigation included it is

considered these impacts would not be significant.

For front line properties approximately 10m from the carriageway, there is the potential for 6.1.6

temporary residual adverse effects due to construction vibration operations. However, due to

the short-term nature it should is likely to be tolerated provided that prior notice is given to the

occupiers.

In order to minimise noise and vibration impacts from the Project, a schedule of noise control 6.1.7

measures have been formulated for the construction phase, documented in Section 5.5 of this

Report. With mitigation included it is considered that these impacts would not be significant.

In addition, the Contractor would be required to apply for ‘Prior Consent’ under Section 61 of 6.1.8

the Control of Pollution Act 1974. This process enables the management of noise and

vibration using ‘best practicable means’. This would include provision of hours of work,

methodology, programme, details of plant (including sound power levels), predicted noise and

vibration levels and mitigation measures proposed.

Summary 6

36


BS4142 British Standard 4142:2014 Methods for rating and assessing industrial and

commercial sound

BS5228 British Standards Institution (2014iii) British Standard 5228-1:2009+A1:2014 Code of

Practice for Noise and Vibration Control on Construction and Open Sites

BS61672 International Electro-technical Commission, 2003.Standard 61672: (2003)

Electroacoustics. Sound level meters. Part 1: Specifications.

BS 7385 British Standard S 7385-1:1990 ISO 4866:1990 Evaluation and measurement for

vibration in buildings

BS7445 British Standard 7445: (2003) Description and measurement of environmental noise.

HMSO.

CRTN Department of Transport (1988) Calculation of Road Traffic Noise. Department of

Transport, Welsh Office, London

DEFRA Department for the Environment, Food and Rural Affairs

DMRB Design Manual for Roads and Bridges (DMRB) Volume 11, Section 310

Environment Agency 2014 Updated Scoping Report

IEMA Institute of Environmental Management and Assessment Guidelines for Environmental

Noise Impact Assessment

NPPF Department for Communities and Local Government (2012) National Planning Policy

Framework

NPPG National Planning Policy Guidance (NPPG) [DCLG, 2014]

NPSE Department for Environmental Food and Rural Affairs (2010) Noise Policy Statement

for England

The Effects of Anthropogenic Sources of Sound on Fishes (2006) A. N. Popper and M. C.

Hastings

WHO The World Health Organization (1999) Guidelines for Community Noise, Europe.

References 7

37


Abbreviations Definition

BBC Boston Borough Council

BS4142 British Standard 4142:2014 Methods for rating and assessing industrial and commercial sound

BS5228 British Standards Institution (2014iii) British Standard 5228-1:2009+A1:2014 Code of Practice for Noise and Vibration Control on Construction and Open Sites

BS61672 International Electro-technical Commission, 2003.Standard 61672: (2003) Electroacoustics. Sound level meters. Part 1: Specifications

BS7385 British Standard S 7385-1:1990 ISO 4866:1990 Evaluation and measurement for vibration in buildings

BS7445 British Standard 7445: (2003) Description and measurement of environmental noise. HMSO.

CRTN Department of Transport (1988) Calculation of Road Traffic Noise. Department of DEFRA Department for the Environment, Food and Rural Affairs

dB Decibel

DMRB Design Manual for Roads and Bridges (DMRB) Volume 11, Section 310

EIA Environmental Impact Assessment

ES Environmental Statement

IEMA Institute of Environmental Management and Assessment Guidelines for Environmental Noise Impact Assessment

LA01 Statistical descriptor defined as the A-weighted sound pressure level exceeded for 1% of the measurement interval.



LAmax,F Maximum A-weighted sound pressure level with the fast time-weighting

LOAEL Lowest Observed Adverse Effect Level

NOEL No Observed Effect Level

NPPF Department for Communities and Local Government (2012) National Planning Policy Framework

NPPG National Planning Policy Guidance (NPPG) [DCLG, 2014]

NPSE Department for Environmental Food and Rural Affairs (2010) Noise Policy Statement for England

PoB Port of Boston

PPV Peak Particle Velocity

Re Reference

RMS Root Mean Square

SOAEL Significant Observed Adverse Effect Leve lLAeq,T A-weighted equivalent continuous noise level

Abbreviations 8

38


Abbreviations Definition

SSFD South Forty Foot Drain

WHO The World Health Organization (1999) Guidelines for Community Noise, Europe

39


Term Explanation

Air quality management area (AQMA)

Area defined by the local authority as an area requiring management because air quality levels do not meet national air quality objectives

Baseline A description of the present state of the environment with the consideration of how the environment would change in the future in the absence of the plan/programme/Project as a result of natural events and other human activities.

Baseline studies/ survey Collection of information about the environment which is likely to be affected by the Project

Cumulative Impacts The combined impacts of several projects within an area, which individually are not significant, but together amount to a significant impact.

Environmental Action Plan (EAP)

A standalone report or section within another environmental impact assessment document which ensures that constraints, objectives and targets set in the main Environmental Report/Statement are actually carried out on the ground. Actions are separated into those to be carried out before, during and after construction.

Environmental Impact Assessment (EIA)

“EIA is an assessment process applied to both new development proposals and changes or extensions to existing developments that are likely to have significant effects on the environment. The EIA process ensures that potential effects on the environment are considered, including natural resources such as water, air and soil; conservation of species and habitats; and community issues such as visual effects and impacts on the population. EIA provides a mechanism by which the interaction of environmental effects resulting from development can be predicted, allowing them to be avoided or reduced through the development of mitigation measures. As such, it is a critical part of the decision-making process.” www.iema.net/eiareport

Environmental Report (ER)

(1) The document produced for projects that do not require statutory environmental impact assessment, but where environmental impact has been carried out. This includes projects that require planning permission from the local authority but the effects of the proposal would not be significant. An ER usually follows the same template as an Environmental Statement, but is less detailed.

(2) The document produced to describe the strategic environmental assessment process carried out for strategies. This report can be standalone or contained as an appendix to a strategy.

Environmental Statement (ES)

The document produced to describe the environmental impact assessment process where statutory environmental impact assessment is required.

Flood alleviation scheme (FAS)

Scheme designed to reduce the risk of flooding in a given area

Flood defence

A structure (or system of structures) that reduce flooding from rivers or the sea

Geographical Information Systems (GIS)

A computer based system for capturing, storing, integrating, manipulating, analysing and displaying data spatially.

Health impact assessment

“A combination of procedures, methods and tools by which a policy, programme or project may be judged as its potential effects on the health of a population, and the distribution of those effects within a population.” World Health Organisation.

Local Biodiversity Action A local plan with targets to protect and enhance biodiversity to achieve national

Glossary 9

http://www.iema.net/eiareport

40


Term Explanation

Plan (LBAP) targets and also to protect locally important species

Mitigation measures Actions that are taken to minimise, prevent or compensate for adverse effects of the development.

Scoping

The process of deciding the scope or level of detail of an EIA/ SEA. During this stage the key environmental issues (likely significant effects) of a project/strategy are identified so that the rest of the process can focus on these issues. Issues may result from the proposal itself or from sensitivities of the site.

Screening (1) For environmental impact assessment, the process of deciding which developments require an environmental impact assessment to be carried out and whether this will be statutory.

(2) For strategic environmental assessment, the decision on which plans, strategies or programmes require strategic environmental assessment to be carried out and whether this will be statutory.

Screening opinion Statutory opinion from the competent authority as to whether a proposed project requires statutory environmental impact assessment according to the Environmental Impact Assessment Regulations.

Strategy See Flood Risk Management Strategy

41


Appendices

A. Figures __________________________________________________________________________ 43 B. Photographs ______________________________________________________________________ 47 C. Tables ___________________________________________________________________________ 51

42



43


Figure A.1: Long-term (LT), unattended noise measurement data from position LT1

Figure A.2: Long-term (LT), unattended noise measurement data from position LT2

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

100.0

12:15:00

15:30:00

18:45:00

22:00:00

01:15:00

04:30:00

07:45:00

11:00:00

14:15:00

17:30:00

20:45:00

00:00:00

03:15:00

06:30:00

09:45:00

13:00:00

16:15:00

19:30:00

22:45:00

02:00:00

05:15:00

08:30:00

11:45:00

15:00:00

18:15:00

21:30:00

00:45:00

04:00:00

07:15:00

10:30:00

13:45:00

17:00:00

20:15:00

23:30:00

02:45:00

06:00:00

09:15:00

12:30:00

15:45:00

19:00:00

22:15:00

01:30:00

04:45:00

08:00:00

11:15:00

14:30:00

17:45:00

21:00:00

00:15:00

03:30:00

06:45:00

10:00:00

13:15:00

Measurement start time (hh:mm:ss)

LAeq LA01 LA90

A. Figures

44


Figure A.3: Construction-generated vibration from BS5228-2

Site BoundarySite Features

Measurement Locations - NoiseLT1LT2ST1ST2ST3/LT2

The Haven

London Road

WybertonLow Road

Wet Dock

Fishe

rman

s qua

y

LT1/R2

LT2/ST3/R8

ST2/R13

ST1/R14

R1

R9

R7R6R5

R4R3

R10R11

R12

1:5,000 P1PRE

Boston Barrier ProjectMeasurement and Receptor LocationsFigure 2.1

Scale at A3

Environment Division22. Station RoadCambridge, CB1 2JDUnited KingdomT +44 (0)1223 463 500F +44 (0)1223 461007W www.mottmac.com

Client

ENV Check

ApprovedDrawn

RevStatus

Figure Number

Title

Ch'k'd App'dDescriptionDrawnDateRev

L. Nikolova

ELLNDraftLCP0 24/11/15

IMAN001472-ES-FIG-5080 100 20050Metres© Mott MacDonald Ltd.

This document is issued for the party which commissioned it and for specific purposes connected with the captioned project only. It should not be relied upon by any other party or used for any other purpose.We accept no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to use by other parties.

Designed

GIS CheckCoordination

E Lunt

Location Reference

Key to Symbols

Contains Ordnance Survey data © Crown copyright and database right 2016, EA Z17791

Receptors - NoiseR1R2R3R4R5R6R7

R8R9R10R11R12R13R14

L. CuttingL. Nikolova L. Herbert

G. Hughes

ELLNUpdated site boundaryDTP1 21/07/16

46


47


Photograph B.1: Photograph of measurement position LT1

Photograph B.2: Photograph of measurement position ST1

B. Photographs

48




49


Photograph B.5: Photograph of measurement position LT2

50



51


Table C.1: Indicative plant and equipment

Location and activity

Operations Plant BS5228 Ref no.

% on-time

Quantity A-weighted sound pressure level LAeq dB at 10m

Enabling works

Cable laying Wyberton Low Road cable laying

JCB 3CX 180 Wheeled Excavator with Breaker

c.2.28 76 1 76

10t degree tracked Excavator

c.2.25 (14t)

69 1 69

1 circular saw to cut surface

c.4.71 85 1 85

Dumper c.4.3 76 1 76

Lorry / Dumper Idling

c.4.5 63 1 63

Concrete breaker

c.5.1 88 1 88

Dredging

Dredging adjacent to right and left banks (across four phases)

Long reach tracked excavator

c.7.1 100 1 78

Grab hopper dredging tug ship

c.7.2 100 1 82

Right bank

Upgrades to highway

Upgrades to existing highway (for turning circles, safety, sight lines, etc.) suitable for cranes and lorries

Dumper c.4.67 25 1 74

Excavator c.5.18 50 1 80

Mini tracked excavator

c.4.67 50 1 74

Aggregate lorries

c.4.76 10 1 54


Roller c.2.40 10 1 73

1

Establish compound and access roads

Establish compound/offices and construction of

Dozer c.2.13 50 1 78

360 degree tracked Excavator

c.2.18 50 1 75

C. Tables

52




% on-time


access/haul road to embankment and barrier structure

Loader c.2.27 50 1 80

Dumper c.4.3 25 1 76

Crane c.4.50 25 1 71

Lorries Lmax c.2.34 10 1 80

Concrete breaker

c.5.1 10 1 88

Roller c.2.40 10 1 73

Asphalt paver c.5.31 10 1 75

Compound operation

General activities within compound


Telescopic leader rig

c.4.54 50 1 79

Silenced generator

c.4.86 50 1 65

Silenced tower lights

c.4.66 50 1 69

Construction worker vehicles and commuting crew bus

1

Topsoil strip preparatory for flood wall works


c.5.18 100 1 80

Dumper c.4.3 50 1 76

Tipper lorries c.2.34 10 1 80

Installation of working platform

Crawler-mounted rig

C3.21 75 1 79

excavator C3.24 75 1 74

Concrete pump

C3.26 25 1 75

Wheeled mobile crane

C3.30 50 1 70

Lorry with lifting boom

C4.53 10 1 77

Piling Sheet steel Telescopic c.4.54 25 1 79

53




% on-time


piling, crawler crane and piling eqpt. Anchor wall and tie rods installation

leader rig

Hydraulic impact hammer 4500kn

c.3.2 50 1 88

Crawler Crane 60t

c.3.29 50 1 70

Noise shroud 50 1


Support tug 1

Attendant/safety boat

1

Welding plants

c.3.33 50 1 58

Oxy-propane cutting equipment

c.3.34 50 1 68

Re-instatement Backfilling and construction of RC slab

Concrete pump

C.4.28 25 1 75

Steel formworks

50 1

Crane c.3.29 50 1 70

Loader c.2.27 50 1 80


Dredging Across 4 phases along both banks of the river.

Long reach tracked excavator

c.7.1 100 1 78

Grab hopper dredging ship

c.7.2 100 1 82

River

Cofferdam Construction of temporary works cofferdam and working platform

Vibratory hammer

c.3.8 50 1 88

Hydraulic impact hammer 4500kn50

c.3.2 50 1 88

Crawler Crane 60t

c.3.29 50 1 70

54




% on-time


noise shroud

welding plants c.3.33 50 1 58

oxy-acetylene cutting equipment

c.3.34 50 1 68

mobile access platform

1

Safety boat 1

Left bank

Establish access

Access site via St. John's Road and construction of new access road into works

Dumper c.4.67 25 1 74


Minitracked excavator

c.4.67 50 1 74

Aggregate lorries

c.4.76 10 1 54


Rollers c.2.40 10 1 73

Enabling works Establish site compound with site offices

Dozer c.2.13 50 1 78


c.2.18 50 1 75

Building Control building / Kiosk

Loader c.2.27 50 1 80

Dumper c.4.3 25 1 76

Crane c.4.50 25 1 71


Concrete breaker

c.5.1 10 1 88

Installation of working platform

Crawler-mounted rig

C3.21 75 1 79

excavator C3.24 75 1 74

Concrete pump

C3.26 25 1 75

55




% on-time


Wheeled mobile crane

C3.30 50 1 70

Lorry with lifting boom

C4.53 10 1 77

Piling along left bank

Sheet steel piling, crawler crane and piling eqpt. Anchor wall and tie rods installation

Telescopic leader rig

c.4.54 25 1 79

Hydraulic impact hammer 4500kn

c.3.2 50 1 88

Crawler Crane 60t

c.3.29 50 1 70

Noise shroud


Support tug 50 1

Attendant/safety boat

50 1

Welding plants

c.3.33 50 1 58

Oxy-propane cutting equipment

c.3.34 50 1 68

Concreting Concreting on site for barrier structure

Lorry concrete mixer and pump

c.4.28 25 1 75

Vibrator c.4.34 25 1 69


Source: Mott MacDonald, Environment Agency and Independent Contractor 2016

56


Table C.2: Enabling works - Wyberton Low Road cable laying

Receptor Shortest distance to works (m)

Activity LAeq,T dB at receptor

Baseline weekday day-time dBA

Baseline + activity LAeq dB

Potential for Significant effect

Mitigation

46 Wyberton Low Road 5 95 44 95 Yes Yes





1 Marsh Lane 100 63 44 63 No No

Victoria House 200 55 44 55 No No

38 The Featherworks 820 40 49 49 No No


148 Windsor Bank 937 38 49 49 No No

18 Alfred Street 800 40 49 50 No No

53 Skirbeck Road 215 40 50 50 No No

14 Bath Gardens 650 42 50 51 No No

27 London Road 350 49 44 50 No No


Table C.3: Right bank upgrade to highway






Mitigation

46 Wyberton Low Road 140 56 44 56 No No





1 Marsh Lane 55 66 44 66 Yes Yes


38 The Featherworks - - 49 - - -


148 Windsor Bank - - 49 - - -

18 Alfred Street - - 49 - - -

53 Skirbeck Road - - 50 - - -

14 Bath Gardens - - 50 - - -

27 London Road - - 44 - - -


57


Table C.4: Right bank establishment and utilisation of compound and access road






Mitigation










148 Windsor Bank - - 49 - - -



14 Bath Gardens - - 50 - - -

27 London Road - - 44 - - -


Table C.5: Right bank compound activities






Mitigation










148 Windsor Bank - - 49 - - -



14 Bath Gardens - - 50 - - -

27 London Road - - 44 - -


58


Table C.6: Right bank topsoil strip and earthworks






Mitigation










148 Windsor Bank - - 49 - - -



14 Bath Gardens - - 50 - - -

27 London Road - - 44 - - -


Table C.7: Right bank working platform installation






Mitigation










148 Windsor Bank - - 49 - - -



14 Bath Gardens - - 50 - - -

27 London Road - - 44 - - -


59


Table C.8: Right bank steel sheet piling






Mitigation
















Table C.9: Right bank re-instatement






Mitigation
















60


Table C.10: Tidal dredging Phase 1 - Daytime






Mitigation
















Table C.11: Tidal dredging Phase 1 - Evening



Baseline weekday evening dBA



Mitigation
















61


Table C.12: Tidal dredging Phase 1 – Night time



Baseline weekday night-time dBA



Mitigation







Victoria House 274 50 36 50 Yes Yes







27 London Road 212 52 36 52 Yes Yes


Table C.13: Tidal dredging Phase 2 - Daytime






Mitigation
















62


Table C.14: Tidal dredging Phase 2 - Evening






Mitigation








38 The Featherworks 120 59 41 59 Yes Yes


148 Windsor Bank 310 57 41 57 Yes Yes






Table C.15: Tidal dredging Phase 2 – Night time






Mitigation











18 Alfred Street 219 52 36 52 Yes Yes

53 Skirbeck Road 293 49 36 49 Yes Yes




63


Table C.16: Tidal dredging Phase 3&4 – Daytime






Mitigation
















Table C.17: Tidal dredging Phase 3&4 – Evening






Mitigation
















64


Table C.18: Tidal dredging Phase 3&4 – Night time






Mitigation
















Table C.19: River – cofferdam temporary works






Mitigation








38 The Featherworks - - - - - -


148 Windsor Bank - - - - - -

18 Alfred Street - - - - - -

53 Skirbeck Road - - - - - -

14 Bath Gardens - - - - - -

27 London Road - - - - - -


65


Table C.20: Left bank enabling works






Mitigation







Victoria House - - - - - -



148 Windsor Bank - - - - - -

18 Alfred Street - - - - - -

53 Skirbeck Road - - - - - -

14 Bath Gardens - - - - - -

27 London Road - - - - - -


Table C.21: Left bank sheet piling






Mitigation
















66


Table C.22: Left bank concreting






Mitigation
















Table C.23: Left bank concreting






Mitigation

46 Wyberton Low Road - - - - - -





1 Marsh Lane - - - - - -








27 London Road - - - - - -


67


Table C.24: Wet Dock Lock earthworks – Night time






Mitigation






1 Marsh Lane - - - - - -






53 Skirbeck Road 215 48 36 48 Yes Yes


27 London Road - - - - - -


Table C.25: Wet Dock Lock concreting - Evening






Mitigation






1 Marsh Lane - - - - - -








27 London Road - - - - - -


68


Table C.26: Wet Dock Lock concreting – Night time



Baseline weekday night time dBA



Mitigation






1 Marsh Lane - - - - - -








27 London Road - - - - - -


69



www.gov.uk/environment-agency

Documents

A17/2a - Volume 2a: Technical Report: Noise and Vibration