mersey gateway bridge project...2014/03/12 · mersey gateway bridge project air quality management...

MERSEY GATEWAY

BRIDGE PROJECT

AIR QUALITY

MANAGEMENT PLAN

REF: MER-DJV-REP-ENV-00-331002

REVISION NO. 02

SPV – MERSEYLINK CJV – SAMSUNG, FCC & KIER

Mersey Gateway Bridge Air Quality Management Plan Final Report

MER-DJV-REP-ENV-00-331002 March 2014

Mersey Gateway Bridge

Air Quality Monitoring Plan Version 2 MER-DJV-REP-ENV-00-331002 Status F

March 2014 i

Document Control Sheet

Rev. Status Date By Check Approved

0 1st Draft 09/08/13

Alexandra Clarke

Tamara Percy

Garry Gray

Sarah Edgar

1 Final 26/09/13 Danny Duce

Tamara Percy

Sarah Edgar

2 Final (removal of trigger levels,

as requested by EHO) 11/03/14

Danny Duce

Mark Hampton

Tamara Percy

URS Royal Court Basil Close Chesterfield S41 7SL

Merseylink Design Joint Venture (the DJV) (comprising Flint & Neill Ltd, URS Infrastructure & Environment UK Limited, Eptisa and Fhecor ) has prepared this Report for the sole use of Merseylink Civil Contractors JV (“Client”) in accordance with the Agreement under which our services were performed. No other warranty, expressed or implied, is made as to the professional advice included in this Report or any other services provided by the DJV. This Report is confidential and may not be disclosed by the Client nor relied upon by any other party without the prior and express written agreement of the DJV.

The conclusions and recommendations contained in this Report are based upon information provided by others and upon the assumption that all relevant information has been provided by those parties from whom it has been requested and that such information is accurate. Information obtained by the DJV has not been independently verified by the DJV, unless otherwise stated in the Report.

The methodology adopted and the sources of information used by the DJV in providing its services are outlined in this Report. The work described in this Report is based on the conditions encountered and the information available during the period when the report was compiled. The scope of this Report and the services are accordingly factually limited by these circumstances.

Where assessments of works or costs identified in this Report are made, such assessments are based upon the information available at the time and where appropriate are subject to further investigations or information which may become available.

The DJV disclaim any undertaking or obligation to advise any person of any change in any matter affecting the Report, which may come or be brought to the DJV attention after the date of the Report.

Certain statements made in the Report that are not historical facts may constitute estimates, projections or other forward-looking statements and even though they are based on reasonable assumptions as of the date of the Report, such forward-looking statements by their nature involve risks and uncertainties that could cause actual results to differ materially from the results predicted. The DJV specifically does not guarantee or warrant any estimate or projections contained in this Report.

Copyright

© This Report is the copyright of the DJV. Any unauthorised reproduction or usage by any person other than the addressee is strictly prohibited


Air Quality Monitoring Plan 1 Version 2 MER-DJV-REP-ENV-00-331002 Status F

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Contents 1 INTRODUCTION .................................................................................................. 1

1.1 The Mersey Gateway Project ............................................................................... 1

1.2 Purpose of this document ..................................................................................... 2

1.3 Structure of this AQMP ......................................................................................... 2

2 SUMMARY OF POTENTIAL AIR QUALITY EFFECTS ....................................... 3

3 MITIGATION STRATEGY .................................................................................... 4

3.1 General construction activities .............................................................................. 4

3.2 Sensitive Construction Traffic Management ......................................................... 6

3.3 Disruption to traffic during construction ................................................................. 7

3.4 Mitigation of operational effects ............................................................................ 8

4 MONITORING ...................................................................................................... 9

4.1 Monitoring during construction .............................................................................. 9

4.2 Deposited Dust Monitoring ................................................................................... 9

4.3 Real-time NOx and PM10 Monitoring ............................................................... 1011

4.4 Nitrogen Dioxide Diffusion Tube Monitoring .................................................... 1112

4.5 Other Pollutants .............................................................................................. 1415

4.6 Meteorological Data ........................................................................................ 1415

4.7 Odours ........................................................................................................... 1415

5 REFERENCES ............................................................................................... 1617

Appendices Appendix A Mersey Gateway Project: Dust Risk Register Appendix B Mersey Gateway Project: Summary Checklist Figures Figure 1 Air Quality Management Plan Proposed Construction Phase Monitoring Locations



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1 INTRODUCTION

1.1.1 This Air Quality Management Plan (AQMP) has been produced to provide details of all

Air Quality Mitigation and Monitoring required for the Mersey Gateway Project. The

requirements for this mitigation were identified in the Further Applications Environmental

Statement (Gifford, 2011), and then collated in the Construction and Operation Code of

Practice for Environmental management (COPE, 2011, B4027D/COPE/R01). At present

this is a dynamic document which will be updated as pre-construction reports become

available.

1.1 The Mersey Gateway Project

1.1.2 Halton Borough Council (the “Council”) is promoting a new road crossing of the Mersey

Estuary (the “Estuary”) in the Borough of Halton (the “Borough”) and associated works to

incorporate the new road crossing into the existing road network and to make changes to

that network. Collectively the works required are known as the Mersey Gateway Project

(hereafter referred to as the “Project”).

1.1.3 The Project will provide effective road connections to the Liverpool City area from north

Cheshire in the south, thereby providing connectivity for the sub-region and addressing

existing congestion in the Borough. The new road capacity will rebalance the

transportation infrastructure within Halton towards delivering local sustainable transport

and economic goals.

1.1.4 The Project’s scope includes the following:

1. The delivery of a new road crossing of the River in Halton, known as the Mersey

Gateway Bridge (referred to as the “New Bridge” throughout this plan);

2. Incorporation of the New Bridge in the existing highway network. These works are

referred to as the Remote Highway Works;

3. Modification and de-linking of the Silver Jubilee Bridge (SJB) (excluding the asset

management of the SJB works);

4. Integration of the revised networks with public transport, cycle and pedestrian

links across Halton;



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5. Integration with the surrounding environment through landscaping adjacent to the

New Bridge and SJB;

6. Implementation of tolling and development of associated infrastructure; and

7. Letting a Concession Contract for the construction, operation and maintenance of

the Project.

1.2 Purpose of this document

1.2.1 This document is the Air Quality Management Plan (AQMP) and forms one of the more

detailed environmental management plans required by the COPE. It sets out air quality

mitigation and monitoring measures required to mitigate the effects of the Project as

drawn from the Further Applications ES (Chapter 19 (Air Quality and Climate)).

1.2.2 This AQMP outlines measures for mitigation and management which have been

developed to address the potential air quality effects identified through the Environmental

Impact Assessment (EIA) and presented in the Further Applications ES.

1.2.3 The Mersey Gateway Bridge AQMP describes the processes, methodologies and

behaviours that the project team will follow in order to mitigate and minimise the effect of

its operations in terms of air quality impact.

1.2.4 The programme of monitoring of air quality has been agreed with the Council. The

programme has been designed to mirror the scope and approach taken to the pre-

construction air quality survey commissioned by the Council, which was carried out

between February and July 2013.

1.3 Structure of this AQMP

1.3.1 The AQMP is structured as follows:

• Section 2: provides a brief overview of the potentially significant air quality effects

for the scheme;

• Sections 3: sets out the mitigation strategy;

• Sections 4: addresses the monitoring strategy for the scheme;

• Section 5: discusses reporting responsibilities;



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• Section 6: sets out data recording;

• Section 7: examines the Interface with the public and;

• Section 8: References

2 SUMMARY OF POTENTIAL AIR QUALITY EFFECTS

2.1.1 This section presents a summary of the potentially significant air quality effects, including

those related to construction dust, construction traffic emissions, and disruption to traffic

during construction, local air quality and regional air quality.

2.2.2 Table 2.1 presents the potential effects for both the construction and operational phases

of the scheme

Table 2.1- Summary of potentially significant Air Quality Effects

Project Phase Effect Receptor and importance

Nature of effect

Construction Construction Dust Human and ecological receptors within 200m of construction areas. High local importance.

Nuisance and health

Construction Traffic Emissions

Health

Disruption to traffic during construction

Operational Widnes Centre Key sensitive receptors. High local importance. Variable magnitude of effect varying from very low to high.

Health

A562 Speke Road

Silver Jubilee Bridge

A557 Watkinson Way – Widnes Eastern bypass

A557 Weston Point Expressway

Runcorn Centre

A533 Central expressway

A558 Daresbury Expressway

M56 Motorway

Weston Link – M56 Junctions

Peel House Lane, Widnes

Deacon Road, Widnes

Greenway Road, Runcorn

Chester Road

Great Sankey

Warrington

Changes in regional NOx, PM10 and CO2 emissions from the modelled road network

Health and climate change



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3 MITIGATION STRATEGY

3.1 General construction activities

3.1.1 The potential effects on air quality during the construction phase are:

a. Dust from construction activities;

b. Emissions from construction related traffic;

c. Disrupted traffic on the local road network may lead to increased emissions; and

d. Emissions to air as a result of contaminated land and waste

3.1.2 Those activities with the potential to emit dust and PM10 will be identified, and shown in

the project dust risk register.

3.1.3 The project dust risk register will be developed and maintained throughout the

construction of the project. Dust sources will be predicted where possible and this will be

updated as new sources are identified during construction phase. The project dust risk

register is included in Appendix A.

3.1.4 During construction and demolition and other advanced works such as site clearance,

consideration will be given to the passage of vehicles entering and leaving the site, re-

suspended dust, and the operation of site vehicles, and temporary traffic diversions.

Targeted planning and identification of dust sources should be undertaken through the

use of checklists provided in the Building Research Establishment’s (BRE) publication

‘Control of dust from construction and demolition activities’ (Appendix B). Appendix B

displays a sample checklist provided to help with ensuring that all aspects relating to the

control of dust emissions have been considered (BRE, 2003).

3.1.5 In practice, many of the potential dust emissions can be controlled by sensible

operational procedures, good site practices and Best Available Techniques (BAT),

therefore minimising the likelihood of a negative effect on the local air quality.

3.1.6 However, in order to minimise the effect of dust nuisance throughout the construction of

the project the following dust suppression measures will be implemented where required:

a. The damping down of exposed soils, loose materials or unmade surfaces close to

sensitive locations during dry weather;



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b. The sheeting of vehicles transporting earthworks materials to or from site;

c. Limiting vehicle speeds over unmade surfaces;

d. Controls applied to the cutting and grinding of materials;

e. Burning of materials will be prohibited;

f. The use of cleanable hard standings and the provision of wheel washing facilities

at site exits where appropriate;

g. Regular use of sweepers on local roads if visible amounts of soil material from the

works are carried onto the public highway;

h. Operation of a complaint and investigative response procedure

i. Haul routes to be located away from off-site sensitive properties as far as

practicable and to be watered regularly (wet suppression of dust);

j. Where possible, all site vehicles and plant to have upward-facing exhausts to

minimise surface dust re-suspension;

k. Bunds or screens may be constructed as wind breaks, to reduce wind speeds.

Earth bunds would be seeded as soon as possible, prior to which they are to be

maintained damp;

l. The aggregate stocking area would be located away from sensitive areas and

residential properties as far as practicable;

m. Stockpiles should also be watered and water curtains may additionally be used at

the site boundaries near sensitive properties;

n. Off-site vehicles should have their wheels and bodies cleaned on a regular basis

and the access road to be hard-surfaced and maintained damp;

o. Early paving of permanent roads;

p. Minimisation of drop heights, and make use of chutes to discharge material close

to where it is required;



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q. Consolidation and bulking of wastes to minimise transportation and handling

requirements;

r. No vehicle or item of equipment emitting visible black smoke (other than during

ignition) will be used on any construction site or public highway;

s. Enclosure and/or covering of stockpiles to reduce effects of windblown dust

where necessary;

t. Screens and/or wrapping of buildings to be demolished to reduce dust emissions;

u. Demolition activities will use methods to minimise emissions of dust including the

use of water sprays to suppress dust; and

v. Fitting dust control devices to equipment which may include wet suppression

methods and local exhaust ventilation.

3.2 Sensitive Construction Traffic Management

3.2.1 Levels of exhaust emissions of all construction works will be considered and mitigated as

part of the scheme. Details will be confirmed with the LPA Environmental Health

Departments. Subject to agreement, the following construction traffic management

measures will be implemented to minimise adverse effects to local air quality resulting

from construction traffic exhaust emissions:

a. Where possible, all non-road mobile machinery (NRMM) will use fuel equivalent

to ultra-low sulphur diesel (ULSD);

b. All NRMM will comply with either the current EU Directive Staged Emission

Standards (97/98/EC, 2002/88/EC, 2004/26/EC) now transposed into UK

regulations);

c. NRMM with power outputs greater than 37kW will be fitted with suitable after-

treatment devices stated on the approved list managed by the Energy Saving

Trust;

d. No vehicles or plant will be left idling unnecessarily;

e. All vehicles and plant will be well maintained and regularly serviced according to

the manufacturers recommendations;



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f. Temporary power generator exhausts will be placed as far from sensitive

properties as practicable;

g. Utilisation of existing power sources rather than temporary power generators

where practicable;

h. Haul routes will be located away from off-site sensitive properties as far as

practicable with appropriate speed limits enforced;

i. The use of consolidation centres to manage site deliveries and handling

requirements will be considered;

j. Where constructions are located near to waterways and/or railways, consider

delivering and removing materials from the site using these means, rather than by

road should be considered;

k. Clear signage of construction vehicle routes and access/egress points;

l. Construction affecting traffic flows will be scheduled for off-peak hours when

possible; and

m. Wheel wash facilities will be provided, along with regular cleaning and sweeping

of haul roads.

3.2.2 Refer to the Construction Management Plan for further details

3.3 Disruption to traffic during construction

3.3.1 Measures will be undertaken where possible to limit disruption to traffic flows on the local

network and therefore minimise the risk of increased vehicle emissions due to congested

traffic. These include phased traffic management whilst works within construction area

progresses, carriageway upgrades for diverted traffic as early as possible, use of new

carriageway for diverted traffic as early as possible, minimisation of road closures

(essential works to be undertaken during off-peak periods), planning the most difficult

phases of traffic management towards the end of the construction phase and traffic

diversion routes planned to avoid residential roads.

3.3.2 In addition, there are specific mitigation (or traffic management) measures relating to

each construction area as shown in table 3.1 below:



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Table 3.1 Traffic Management Measures proposed for each construction Area

Area

Traffic Management

Area 1: Speke Road to Freight Line

a) Works would take place towards the end of overall construction period

b) Traffic using Speke Road would be maintained by a phased system of construction

c) Are likely to be undertaken in the overall construction programme to minimise disruption

d) Traffic would be diverted off existing carriageway passing over existing Ditton Junction

e) Complex traffic management would be required to maintain flows at Ditton junction

f) Temporary road diversions required for existing and new carriageway areas

Area 2: Victoria Road to St Helens Canal

a) Demolition of existing buildings within the catalyst Trade Park and along Victoria road would be undertaken early to allow for service disruptions

b) Construction of Victoria Road Bridge and embankment would be phased and require temporary traffic diversion for the Widnes Eastern Bypass along Ashley Way

c) No traffic management required for bridges within Widnes Loop Junction

Area 3: Mersey Gateway Bridge

a) No proposed traffic management measures

Area 4: Astmoor Viaduct to Bridgewater Junction

a) Astmoor Road and Astmoor Busway diverted locally b) Are likely to be undertaken late in the overall construction

programme to minimise disruption on existing expressway network

c) For the main bridge works, a complex multi-phase traffic management programme would be established

d) Sequenced diversion of existing east-east and south traffic movements, with two-lane flows maintained in each direction

e) Diversion of traffic onto new slip road bridges f)

Area 5: Halton Lea Junction a) Phased traffic management along the expressways during construction of the modified road, distributor road and junction layouts

Area 6: Lodge Lane Junction

a) Phased traffic management along the expressways during construction of the modified road, distributor road and junction layouts

Area 7: Weston Link Junction

a) Phased traffic management along the expressways during construction of the modified road, distributor road and junction layouts

Area 8: A557 Weston Point to M56 Junction 12 North

a) Temporary traffic measures and minor diversions during construction of new junction layout

Area 9: Silver Jubilee Bridge and Widnes De-Linking

a) Works would be carried out following completion of the main Mersey Gateway bridge works

b) Traffic would be diverted onto other corridors, including the project including the proposals

3.4 Mitigation of operational effects

3.4.1 No additional mitigation is considered necessary.



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4 MONITORING

4.1 Monitoring during construction

4.1.1 In order to define baseline pollutant concentrations prior to and during construction both

continuous and non-continuous monitoring stations will be employed. Baseline

monitoring sites have been established through a programme of pre-construction

monitoring, in order to provide information on the local baseline near to sensitive

receptors. The baseline pre-construction monitoring has been used to establish existing

pollutant concentrations across the area which could potentially be affected by

construction works.

4.1.2 Merseylink will employ Best Practicable Means during construction and monitoring will be

undertaken to establish the effectiveness of the measures employed. The procedures

have been agreed within the CEMP and will ensure that impacts on monitored pollutant

concentrations are reduced as far as is practicable.

4.1.3 Monitoring of the effects of operation of the Project on NO2 and PM10 concentrations will

be undertaken at locations to be agreed with the LPA. Suitable monitoring sites

established for use throughout the construction phase of the Project would provide ideal

locations at which to continue monitoring the long term effects.

4.2 Deposited Dust Monitoring

4.2.1 The rate of dust deposition will be monitored within 200m of active construction areas.

The monitoring locations during construction would be the same as those used in the

pre-construction air quality monitoring survey, unless any further potentially significant

sources of dust emissions are identified in which case the new locations would be agreed

in writing with the LPA. The monitoring sites consist of 15 locations as shown in Table

4.1. At two locations, a directional strip is used to establish the prevailing wind direction

in place of a deposition device. The monitoring method to be used is via adhesive pads,

which are attached to the top of a vertical pole to collect deposited dust. The criteria

applied to indicate the potential for nuisance are developed by the equipment supplier,

and are based on the dust coverage on the collection device after sampling.



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Table 4.1- Dust Deposition Monitoring Locations

Sample ID Location Type OS Co-ordinate

x y

DM1 Council Building - McDonalds Adhesive Pad 350745 385223

DM2 Catherine Street Adhesive Pad 351560 385054

DM3 Waterloo Centre Adhesive Pad 351223 384717

DM4 Dock Street Adhesive Pad 351098 384279

DM5 Irwell Street Adhesive Pad 351130 383925

DM6 West Bank Primary School Directional Strip 351071 383831

DM7 Waterloo Community Centre Adhesive Pad 350960 383062

DM8 Runcorn Train Station Adhesive Pad 350887 382681

DM9 Brookfield Avenue Adhesive Pad 353155 382823

DM10 The Calvers Adhesive Pad 353259 382147

DM11 ASDA, Runcorn Adhesive Pad 353329 381519

DM12 Woodside School Directional Strip 353035 381233

DM13 Betchworth Crescent Adhesive Pad 352912 380735

DM14 Wigg Island Adhesive Pad 352325 383321

DM15 Café West of Ditton Road Roundabout Adhesive Pad 350348 384938

4.3 Real-time NOx and PM10 Monitoring

4.3.1 Concentrations of NOX and PM10 will be monitored through the use of continuous

analysers at a minimum of three locations (see Figure 1). These locations have been

agreed with the LPA and are:

• CMa: The Calvers, on the Central Expressway, Runcorn (NGR 353259, 382137);

• CMb: Waterloo Centre, north of the River, adjacent to those properties most

affected by the SJB (NGR 351227, 384693);

• CMc: Liverpool Speke, Tarbock Road, Liverpool (NGR 343887, 383603).; and



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4.3.2 Sites CMa and CMb have been positioned at a distance from roads that is representative

of local sensitive receptors, and would allow monitoring of the effects of construction

phase impacts in these areas. The sites are suitable for monitoring of air quality

throughout the various stages of the project and would not need to be relocated during

the course of the works.

4.3.3 The Liverpool Speke site (CMc) is an existing urban background monitoring station. The

Speke site is part of Defra’s UK-wide AURN network. The Council have determined that

this site is representative of the background air quality in the vicinity of the construction

site, and that a project specific background monitoring station is not required.

4.3.4 Typical continuous PM10 monitoring at the two Project specific monitoring sites (CMa and

CMb) will employ a Tapered Element Oscillating Microbalance (TEOM) measurement

technique, in order to replicate the methodology employed in the pre-construction

baseline survey.

4.3.5 In addition to the continuous monitoring stations described above, further particulate

monitoring, using a light scatter monitoring technique will be employed at a further two

locations. The monitoring locations during construction would be the same as those used

in the pre-construction air quality monitoring survey (DM6 and DM12, see Table 4.1),

unless any further potentially significant sources of particulate matter emissions are

identified in which case the new locations would be agreed in writing with the LPA.

4.4 Nitrogen Dioxide Diffusion Tube Monitoring

4.4.1 Monitoring of NO2 will also be undertaken using NO2 diffusion tubes, in order to

supplement the information collected using the continuous monitors. The monitoring

locations during construction would be the same as those used in the pre-construction air

quality monitoring survey, unless any further potentially significant sources of dust

emissions are identified in which case the new locations would be agreed in writing with

the LPA. Monitoring of air quality over the long term would have the added purpose of

showing the benefits of the project, including the proposals, and demonstrate the

significance of the effects have been predicted appropriately. However, such monitoring

would also highlight where the operation of the project, including the proposals has

resulted in greater effects than expected.

4.4.2 The monitoring sites consist of 24 locations as shown in Table 4.2. Single tubes are to be

placed at the majority of locations, however at 6 sites triplicate tubes will be placed in



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order to enable a statistical test to be carried out as to the reproducibility of the sample

results from tube to tube. The triplicate sites will include co-located tubes at the

continuous monitoring stations, making it possible to determine a local bias correction to

be applied across the scheme area.



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Table 4.1- Dust Deposition Monitoring Locations

Sample ID Location Type OS Co-ordinate

x y

DT1 Council Depot nr. golf course Single 350679 385244

DT2 Moor Lane Single 350874 385250

DT3 Rose Street Single 350981 385284

DT4 Catherine Street a Single 351278 384995

DT5 Catherine Street b Single 351572 385043

DT6 Waterloo Centre Triplicate 351228 384718

DT7 Dock Road Single 351022 384389

DT8 Wright Crescent Single 351089 384014

DT9 West Bank School Single 351072 383836

DT10 RSNU Church Single 350806 383212

DT11 Egerton Street Single 350933 383051

DT12 Cavendish Street Single 350997 382613

DT13 Westfield/Crofton Road Single 350103 382114

DT14 Weston Point School Single 350293 381314

DT15 Union Street Single 351792 382635

DT16 Brookfield Avenue Single 353180 382840

DT17 Calvers Triplicate 353287 382195

DT18 Cofton Lane Single 353136 381539

DT19 Woodside School Single 353065 381225

DT20 Betchworth Crescent Single 352741 380710

DT21 Millersdale Grove Single 352559 380535

DT22 Riven Mill Close Single 352448 388202

DT23 Greenway Road Single 351120 382498

DT24 Milton Road Triplicate 351387 385626



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4.5 Other Pollutants

4.5.1 Monitoring of metals (e.g. arsenic, cadmium, nickel and lead) will be undertaken by

analysing the dust collected by the sticky pad survey at four locations (DM1, DM4, DM9,

DM15 see Figure 1). The metals analysis would only be performed during the period of

contaminated land remediation works in these areas, when the potential for elevated

atmospheric metals concentrations would occur. Any samples taken which are not

immediately tested will be retained by the laboratory so that they can be analysed

retrospectively at a later date if necessary.

4.6 Meteorological Data

4.6.1 Local meteorological data will be recorded at the two project specific continuous

monitoring sites (CMa and CMb) (see Figure 1). Meteorological data will specifically

measure wind speed, wind direction and rainfall.

4.7 Odours

4.7.1 Odour control measures and monitoring are unlikely to be required across the majority of

the construction sites, but where a task based risk assessment identifies that a working

area has significant potential to generate odorous emissions then measures for odour

control will be incorporated within the CEMP as necessary. The need for odour

monitoring will also be considered, to ensure releases do not result in impacts on

amenity at residential properties.

4.7.2 Where odour control measures are needed, the overall aim in the operation of the site

would be to apply best practice at all stages of the operations undertaken on site. For this

reason, the work area would be operated and managed in accordance with the accepted

hierarchy of preferred controls, that is:

1. prevent the formation or emission of odorous compounds in the first place;

2. where this is not practicable, minimise the release of odour;

3. abate excessive emissions; then

4. dilute any residual odour by effective dispersion in the atmosphere.

4.7.3 Where it is implemented, monitoring of odour exposure will be evaluated by sensory field

odour assessment (“sniff testing”) by the site supervisor to record the attributes of the



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odour. The assessment is “sensory” in that the human nose is used as the detector – no

analytical instrument can give a unified measure of a complex mixture of compounds in

the same way that a human experiences odour. The sensory field odour (“sniff test”)

assessments will be based on the Environment Agency’s Sniff Test protocol within the

H4 Horizontal Guidance for odour control.

4.7.4 Where abnormal odour emissions are identified which are causing unacceptable off site

impacts, then action would be taken to identify and cease the activity causing the odour,

then take immediate steps to eliminate the cause of the abnormal situation before

operations resume.



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5 REFERENCES

BRE (2003), Control of Dust from Construction and Demolition Activities, BRE Bookshop.

Construction and Operation code of Practice for Environmental management (COPE,

B4027D/COPE/R01), URS, 2013.

Environment Agency (2011) H4 Odour Management

The Mersey Gateway Project, Further Applications Environmental Statement, Gifford,

2011.

The Mersey Gateway Project (2012) The Requirements for Pre-Construction Air Quality

Monitoring (16.10.2012).

The Mersey Gateway Project (2012) Pre-Construction Air Quality Monitoring

Specification, Revision A (09.10.2012).


Air Quality Monitoring Plan 17 Version 1 MER-DJV-REP-ENV-00-331002 Status F March 2014

Appendix A: Mersey Gateway Project: Dust Risk Register

Current Controls Potential Improvements Dust Source Current Risk Physical Procedural Behavioural Physical Procedural Behavioural Vehicle Movements All Sections

Low Hard standing surface areas and haul routes should be installed for vehicles entering the site and regularly cleaned using wet sweeping methods. Unsurfaced areas should be regularly dampened down during periods of dry and/or windy conditions. Vehicles entering the site with potentially loose, dusty material should be adequately sheeted.

Incident reporting process. Speed limit Enforcement of an appropriate on-site speed limit on unsurfaced areas and hard surfaced areas where there is potential for the resuspension of road dust. Haul routes and hard standing should be visually inspected for integrity and condition and any maintenance undertaken as a result should be recorded within the site log book.

Dust awareness in HSE training. Regular internal reporting of dust monitoring results. It is the responsibility of all site personnel to maintain a vigilance of dust emissions during construction works.

Increased regularity of sweepers and dampening unsurfaced areas

Speed limit awareness campaign. Dust awareness posters.

Site Preparation and Groundworks

Low Dry and/or windy conditions should be avoided if reasonably practicable. Appropriate water suppression to control dust should be available. Excavated materials should be removed away from site as soon as is practicable. Spoil materials extracted from the site should be recycled elsewhere on site, when and where appropriate.

Regard to the programme and contracting arrangements for the relevant works. Incident reporting process. The Site Manager should make reasonable efforts to foresee adverse weather conditions by assessing an appropriate source of weather forecast data.

Regular internal reporting of dust monitoring results. Operator training and task specific risk assessments.



Current Controls Potential Improvements Dust Source Current Risk Physical Procedural Behavioural Physical Procedural Behavioural Wind Erosion from stockpiles

Low Slopes on Stockpiles should be no steeper than the natural angle of repose of the material and should maintain a smooth profile. Spoil materials should be removed away from site as soon as practicable. If unavoidable, spoil stockpiles should be regularly dampened down, sheeted or sealed before being removed from the site at the earliest opportunity. Minimise handling of stockpiles and drop heights. Stockpiles should be located away from site boundary and if unavoidable, within an enclosure.

Incident reporting process.




Current Controls Potential Improvements Dust Source Current Risk Physical Procedural Behavioural Physical Procedural Behavioural Handling and Storage of Materials

Low Bulk cement and other fine powder materials should be delivered in enclosed tankers and stored in silos to prevent the escape of material and overfilling during delivery. Handling of large quantities of potentially dusty material should be done so in an enclosed or shielded environment. Material should be stored away from site boundaries and/or potentially sensitive receptors and not allowed to dry out. The number of handling operations should be kept to a minimum. Enclosed conveyors should be used to transport materials if there is the unavoidable need to cross roads and other public property that are not under the ownership or control of the nominated undertake. Drop heights from conveyors, loading shovels, hoppers and other loading or handling equipment should be minimised and such equipment should be fitted with fine water sprays wherever appropriate. Spoil materials extracted from the site during back-filling operations should be recycled elsewhere on site, when and where appropriate.





Current Controls Potential Improvements Dust Source Current Risk Physical Procedural Behavioural Physical Procedural Behavioural Cutting, Crushing and Grinding

Low Plant should be fitted with appropriate dust control measures, such as enclosed conveyors, rubble chutes and water suppression, where reasonably practicable. Designed/ prefabricated materials should be used to reduce the need for grinding, sawing and cutting on site, wherever reasonably practicable.



Any crushing or grinding plant used on site, which falls within the definition in Section 3.5 Chapter 3 of Pollution Prevention and Control (England and Wales) Regulations 2000 S.I.1973, should have the appropriate permit issued and should be maintained according to the procedures set out in the Pollution Prevention and Control Act 1999. A copy of this permit should be held on site.

Concrete Batching Plant operations Sections 2 and 4

Low Raw material deliveries and operations to be performed in accordance with best practice. Manipulation of fine materials, such as the mixing of cement, should take place in an enclosed area that is remote from the site boundary and potentially sensitive receptors.

Incident reporting process, Planned maintenance and inspection programme for plant.




Appendix B: Mersey Gateway Project: Summary Checklist (BRE, 2003 ‘Control of dust from construction and demolition activities’)

Action Yes/No Responsible Personnel Observed Closed Out

Have the Local Authority Environmental Health and Planning Departments been contacted and involved?

Do other regulators like the Environment Agency, HSE etc. need to be involved (e.g. for water run-off)?

Have environmental risk assessments been conducted?

Are method statements for dust control agreed and in place?

Is the site in a Local Authority Air Quality Management Area (AQMA)?

Is dust monitoring required, and what type?

Are dust emission limits to be agreed or imposed?

Will breaches of emission limits shut down activities or the complete site?

Are the costs of shutdown known by everyone?

Have positions of site entrances, haul roads, and speed limits been considered?

Have low dust-producing materials and techniques been specified?

Have costs of dust control equipment and operation been incorporated into project specification and tenders?



Action Yes/No Responsible Personnel Observed Closed Out

Is the specified dust control equipment available on site for immediate use?

Are dust control ‘champions’ to be appointed?

Have they been given sufficient time and level of responsibility for the task?

Are procedures for site logging of dust generating activities and control measures in place?

Are public relations and information systems in place?

Have the site management team and contractors been trained and informed?

What incentives or penalties are to be in place for staff/contractors?

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