Brentwood Borough Council 2012 Air Quality Updating and Screening Assessment for Brentwood Borough Council

In fulfilment of Part IV of the Environment Act 1995 Local Air Quality Management

AMEC Environment & Infrastructure UK Limited

May 2012

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Document Revisions

No. Details Date

1 Draft Report 26 April 2012

2 Final Report 29 May 2012

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Report for Brentwood Borough David Carter Environmental Health & Licensing Council Brentwood Borough Council Town Hall Ingrave Road 2012 Air Quality Brentwood Updating and Screening CM15 8AY Assessment for Main Contributors Annie Hindley Brentwood Borough John Pinkstone Council

Issued by In fulfilment of Part IV of the

………………………………………………………… Environment Act 1995 Local Air Annie Hindley Quality Management

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Local Authority Officer David Carter

Department Environmental Health & Licensing

Brentwood Borough Council Town Hall, Ingrave Road Address Brentwood Essex CM15 8AY

Telephone 01277 312509

e-mail [email protected]

Report 32244/Brentwood/Final Report Reference number

Date May 2012

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Executive Summary

Part IV of the Environment Act 1995 places a statutory duty on local authorities to review and assess air quality in their areas, and to determine whether or not the Air Quality Objectives (AQOs) are likely to be achieved.

An Updating and Screening Assessment (USA) identifies any significant changes that may have occurred since the last round of Review and Assessment. The USA considers new monitoring data and emissions sources to determine whether there is a requirement for a Detailed Assessment for any of the pollutants applicable to Local Air Quality Management (LAQM).

The USA for Brentwood Borough Council concludes that a Detailed Assessment is required for the diffusion tube location 14 (High Street, Brentwood). This location has shown an exceedence of the AQO for nitrogen dioxide

(NO2) in 2011 and also in 2010.

In addition the diffusion tubes located in AQMAs 1, 3, 5 and 6 have shown no exceedences of the annual mean

NO2 AQO for the past four years and therefore Brentwood Borough Council may consider whether these AQMAs could be revoked.

The next course of action for Brentwood Borough Council will be to submit a Progress Report by the end of April

2013 for all pollutants and monitoring locations apart from NO2 diffusion tube 14, which will be the subject of a Detailed Assessment. In addition the revocation of AQMAs 1, 3, 5 and 6 should also be considered.

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Contents

1. Introduction 1 1.1 Description of Local Authority Area 1 1.2 Purpose of Report 1 1.3 Air Quality Objectives 1 1.4 Summary of Previous Review and Assessments 3

2. New Monitoring Data 11 2.1 Summary of Monitoring Undertaken 11 2.1.1 Automatic Monitoring Sites 11 2.1.2 Non-Automatic Monitoring Sites 13 2.2 Comparison of Monitoring Results with AQ Objectives 24 2.2.1 Nitrogen Dioxide 24

2.2.2 PM10 31 2.2.3 Sulphur Dioxide 31 2.2.4 Benzene 31 2.2.5 Other pollutants 31 2.2.6 Summary of Compliance with AQS Objectives 31

3. Road Traffic Sources 32 3.1 Narrow Congested Streets with Residential Properties Close to the Kerb 32 3.2 Busy Streets Where People May Spend 1-hour or More Close to Traffic 32 3.3 Roads with a High Flow of Buses and/or HGVs 32 3.4 Junctions 32 3.5 New Roads Constructed or Proposed Since the Last Round of Review and Assessment 33 3.6 Roads with Significantly Changed Traffic Flows 33 3.7 Bus and Coach Stations 33

4. Other Transport Sources 34 4.1 Airports 34 4.2 Railways (Diesel and Steam Trains) 34 4.2.1 Stationary Trains 34 4.2.2 Moving Trains 34 4.3 Ports (Shipping) 34

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5. Industrial Sources 35 5.1 Industrial Installations 35 5.1.1 New or Proposed Installations for which an Air Quality Assessment has been Carried Out 35 5.1.2 Existing Installations where Emissions have Increased Substantially or New Relevant Exposure has been Introduced 35 5.1.3 New or Significantly Changed Installations with No Previous Air Quality Assessment 35 5.2 Major Fuel (Petrol) Storage Depots 35 5.3 Petrol Stations 36 5.4 Poultry Farms 36

6. Commercial and Domestic Sources 37 6.1 Biomass Combustion – Individual Installations 37 6.2 Biomass Combustion – Combined Impacts 37 6.3 Domestic Solid-Fuel Burning 37

7. Fugitive or Uncontrolled Sources 38

8. Conclusions and Proposed Actions 39 8.1 Conclusions from New Monitoring Data 39 8.2 Conclusions from Assessment of Sources 39 8.3 Proposed Actions 39

9. References 40

Table 1.1 Air Quality Objectives included in Regulations for the purpose of LAQM in 2 Table 1.2 Summary of Previous Review and Assessments 3 Table 2.2 Details of Non-Automatic Monitoring Sites 14 Table 2.3 Results of Automatic Monitoring of Nitrogen Dioxide: Comparison with Annual Mean and Hourly Mean Objective 24 Table 2.4 Results of Nitrogen Dioxide Diffusion Tubes 27 Table A.1 Nitrogen Dioxide Raw Monitoring Data 2011 (ppb unless otherwise stated) 41

Figure 1.1 AQMA 1 – M25/Nags Head Lane Junction 4 Figure 1.2 AQMA 2 – M25/A12 Brook Street Roundabout 5 Figure 1.3 AQMA 3 – A12/Greenshaw and Porters Close 6 Figure 1.4 AQMA 4 – A12/Warescot Road/Hurstwood Avenue/Ongar Road 7 Figure 1.5 AQMA 5 – A12/Roman Road 8 Figure 1.6 AQMA 6 – A12/Fryerning Lane, Pemberton Avenue, Trimble Close 9 Figure 1.7 AQMA 7 – A128/A1023 Junction (Wilson’s Corner) 10 Figure 2.1 Location of Automatic Monitoring Site 12 Figure 2.2 Location of Non-Automatic Monitoring Sites (BRW 1, 2, 3, 8, 9, 10, 11, 12, 13, 14 and 15) 19 Figure 2.3 Location of Non-Automatic Monitoring Sites (BRW 5, 6, 7, 16, 17, 18, 32 and 34) 20 Figure 2.4 Location of Non-Automatic Monitoring Sites (BRW 19, 21, 22, 23, 24, 25, 33, 36 and 37) 21 Figure 2.5 Location of Non-Automatic Monitoring Sites (BRW 26, 28, 29, 30, 31 and 38) 22 Figure 2.6 Location of Non-Automatic Monitoring Site (BRW 39) 23 Figure 2.7 Trends in Annual Mean Nitrogen Dioxide Concentrations measured at Automatic Monitoring Sites 25

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Appendix A Diffusion Tube Raw Data 2011 Appendix B QA/QC Data Appendix C List of Prescribed Processes

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1. Introduction

1.1 Description of Local Authority Area

The is mainly made up of the town of Brentwood itself as well as the larger town areas of Shenfield and . In addition, the nearby urban areas of Pilgrims Hatch, Hutton and Warley are also part of the Borough. Brentwood has a large number of woodlands totalling 3,000 acres, which cover a large proportion of the Borough outside of these urban areas.

The main source of air pollution in the Borough is road traffic emissions from the major roads within the Borough, namely the M25, A12, A128, A1023 and A129.

1.2 Purpose of Report

This report fulfils the requirements of the Local Air Quality Management (LAQM) process as set out in Part IV of the Environment Act (1995), the Air Quality Strategy for England, Scotland, Wales and Northern Ireland 2007 and the relevant Policy and Technical Guidance documents. The LAQM process places an obligation on all local authorities to regularly review and assess air quality in their areas, and to determine whether or not the Air Quality Objectives (AQOs) are likely to be achieved. Where exceedences are considered likely, the local authority must then declare an Air Quality Management Area (AQMA) and prepare an Air Quality Action Plan (AQAP) setting out the measures it intends to put in place in pursuit of the objectives.

The objective of this Updating and Screening Assessment (USA) is to identify any matters that have changed which may lead to risk of an AQO being exceeded. A checklist approach and screening tools are used to identify significant new sources or changes and whether there is a need for a Detailed Assessment. The USA report should provide an update of any outstanding information requested previously in Review and Assessment reports.

1.3 Air Quality Objectives

The Air Quality Objectives applicable to LAQM in England are set out in the Air Quality (England) Regulations 2000 (SI 928), The Air Quality (England) (Amendment) Regulations 2002 (SI 3043), and are shown in Table 1.1. This table shows the objectives in units of microgrammes per cubic metre μg m-3 (milligrammes per cubic metre, mg m-3 for carbon monoxide) with the number of exceedences in each year that are permitted (where applicable).

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Table 1.1 Air Quality Objectives included in Regulations for the purpose of LAQM in England

AQO

Pollutant Concentration Measured as Date to be achieved by

16.25 µg m-3 Running annual mean 31.12.2003 Benzene 5.00 µg m-3 Running annual mean 31.12.2010

1,3-Butadiene 2.25 µg m-3 Running annual mean 31.12.2003

Carbon monoxide 10.0 mg m-3 Running 8-hour mean 31.12.2003

0.5 µg m-3 Annual mean 31.12.2004 Lead 0.25 µg m-3 Annual mean 31.12.2008

200 µg m-3 not to be exceeded 1-hour mean 31.12.2005 more than 18 times a year Nitrogen dioxide (NO2) 40 µg m-3 Annual mean 31.12.2005

50 µg m-3, not to be exceeded 24-hour mean 31.12.2004 more than 35 times a year Particles (PM10) (gravimetric) 40 µg m-3 Annual mean 31.12.2004

350 µg m-3, not to be exceeded 1-hour mean 31.12.2004 more than 24 times a year

125 µg m-3, not to be exceeded Sulphur dioxide (SO ) 24-hour mean 31.12.2004 2 more than 3 times a year

266 µg m-3, not to be exceeded 15-minute mean 31.12.2005 more than 35 times a year

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1.4 Summary of Previous Review and Assessments

Table 1.2 summarises the results of the conclusions of previous rounds of Review and Assessment.

Table 1.2 Summary of Previous Review and Assessments

Round Date(s) Summary

1998- Concluded that road traffic emissions from M25, A12 and A127 were the main concern in relation to local air quality. 1 2000 No AQMAs were declared at this time.

2003 USA concluded a Detailed Assessment was required for road traffic emissions from the A12 and the following junctions: M25/A12; A128/A1023 Wilson’s Corner; and Brentwood High Street/Kings Road. In addition, the annual mean PM10 AQO was also predicted to be exceeded at all busy roads and junctions as a result of high background PM10 concentrations. It was recommended that this would need to be considered during further rounds of LAQM.

2004 The Detailed Assessment utilised ADMS Roads dispersion modelling, which predicted exceedences of the annual mean NO2 AQO for receptors located closest to A12, A12/M25 junction and A128/A1203 Wilson’s Corner Junction. An exceedence was also predicted for the nearest receptor to the High Street/ Kings Road junction. Brentwood Borough Council (BBC) was recommended to declare AQMAs following the Detailed Assessment. Taking on board the findings 2 of the Detailed Assessment, Brentwood declared the following AQMAs: M25/Nags Head Lane Junction; M25/A12 Brook Street roundabout; A12/Greenshaw/Porters Close; A12/Warescot Road/ Hurstwood Avenue/Ongar Road; A12/Roman Road, Mountnessing; A12/Fryerning Lane/ Pemberton Avenue/ Trimble Close; and A128/A1203 Wilson’s Corner. Their locations are shown in Figures 1.1-1.7.

2005 A Further Assessment was undertaken to determine the main source of pollution within the AQMAs and how much improvement in air quality would be required to meet the annual mean NO2 AQO. The Further Assessment found that 80% of the NO2 emissions within the AQMA were from road traffic, with Heavy Duty Vehicles (HDVs) contributing a significant proportion of these emissions. An AQAP was produced, based on the Further Assessment, to identify ways in which air quality could be improved in the AQMAs.

2006 The USA concluded that there were still exceedences of the annual mean NO2 AQO within the designated AQMAs, however there were no new areas of exceedences within the Borough.

2007 The Progress Report concluded that that there were still exceedences of the annual mean NO AQO within the 3 2 designated AQMAs, however there were no new areas of exceedences within the Borough.

2008 The Progress Report concluded that that there were still exceedences of the annual mean NO2 AQO within the designated AQMAs, however there were no new areas of exceedences within the Borough.

2009 The USA found that the annual mean NO2 AQO continued to be exceeded within the AQMAs. However, a further 7 monitoring locations outside of the designated AQMAs also showed exceedences of the annual mean NO2 AQO. BBC decided to continue to monitor annual mean NO2 concentrations at these locations, which were all located around the Kings Road/High Street junction in Brentwood.

2010 The Progress Report found that except within the existing AQMAs and on the High Street in Brentwood, the annual 4 mean NO2 AQO would be met. Traffic calming measures were installed along the High Street in Brentwood and monitoring is continuing to assess whether this will improve Air Quality in this area.

2011 The Progress Report concluded that there were exceedences of the annual mean NO2 AQO within the designated AQMAs and at one location on the High Street in Brentwood. The Progress Report recommended that a Detailed Assessment be undertaken for the location in High Street, Brentwood, which showed an exceedence of the annual mean NO2 AQO.

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Figure 1.1 AQMA 1 – M25/Nags Head Lane Junction

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Figure 1.2 AQMA 2 – M25/A12 Brook Street Roundabout

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Figure 1.3 AQMA 3 – A12/Greenshaw and Porters Close

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Figure 1.4 AQMA 4 – A12/Warescot Road/Hurstwood Avenue/Ongar Road

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Figure 1.5 AQMA 5 – A12/Roman Road Mountnessing

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Figure 1.6 AQMA 6 – A12/Fryerning Lane, Pemberton Avenue, Trimble Close

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Figure 1.7 AQMA 7 – A128/A1023 Junction (Wilson’s Corner)

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2. New Monitoring Data

2.1 Summary of Monitoring Undertaken

2.1.1 Automatic Monitoring Sites

Brentwood Borough Council (BBC) operates one continuous monitor within its Borough. This monitor is located at Brentwood Town Hall. The monitor measures concentrations of NO, NOX and NO2 using a chemiluminescence gas analyser. The monitor is calibrated every 2 weeks and serviced every 6 months. Details regarding the location of the monitor are provided in Table 2.1. Figure 2.1 shows the location of the automatic analyser.

Table 2.1 Details of Automatic Monitoring Sites

Relevant Distance to Exposure? kerb of (Y/N with nearest Does this distance road location (m) to represent X OS Y OS Pollutants In relevant (N/A if not worst-case Site Name Site Type Grid Ref Grid Ref Monitored AQMA? exposure) applicable) exposure?

Brentwood Urban 559860 193617 NO N Y (33.3m) 21.9m N Town Hall background 2

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Figure 2.1 Location of Automatic Monitoring Site

Notes: Contains Ordnance Survey data © Crown copyright and database right [2012]

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2.1.2 Non-Automatic Monitoring Sites

Brentwood operates 36 diffusion tubes to monitor NO2 across the Borough. The diffusion tubes are supplied and analysed by Harwell Scientific Services using the 50% triethanolamine (TEA) in acetone preparation method.

Bias adjustment factors provide an estimate of the difference between pollutant concentrations determined by passive diffusion tubes and continuous monitoring methods. Although triplicate tubes are co-located with the continuous monitor at Brentwood Town Hall, it was deemed that Defra’s UK national bias adjustment spreadsheet (version 03/12)1 would provide a more reliable bias correction factor. The tubes were therefore bias corrected using the Defra national study for diffusion tubes prepared by the same laboratory and method. A bias correction factor of 0.84 was obtained.

Details of the diffusion tube monitoring locations are provided in Table 2.2. The locations of the diffusion tubes are illustrated in Figures 2.2 to 2.6.

1 http://laqm.defra.gov.uk/documents/Diffusion_Tube_Bias_Factors-v03_12.xls

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Table 2.2 Details of Non-Automatic Monitoring Sites

Site Name Site Type X OS Grid Y OS Grid Pollutants In AQMA? Is Relevant Distance to Does this Ref Ref Monitored monitoring Exposure? kerb of location collocated (Y/N with nearest road represent with a distance (m) (m) worst-case Continuous to relevant exposure? Analyser? exposure) (N/A if not Site ID (Y/N) applicable)

Council Offices Urban next to NOx 559861 193617 NO N Y Y (33.3) 21.9 Y Background 2 BRW 1 Box

Council Offices Urban NO2 Y (33.3) Y next to NOx Background 559861 193617 N Y 21.9 BRW 2 Box

Council Offices Urban NO2 Y (33.3) Y next to NOx Background 559861 193617 N Y 21.9 BRW 3 Box

Telegraph pole NO2 Y at end of Brook Roadside 556887 192412 Y N Y (16.3) 1.3 BRW 5 Street

Freeway NO2 Y N Y Cottage, 63 Roadside 557014 192493 Y (0.9) 1.3 BRW 6 Brook Street

13 Nags Head NO Y N Y Urban 2 Lane - on fence 557118 191978 Y (5) 15.6 Background BRW 7 trellis

3 High Street - NO Y N Y Roadside 559691 193912 2 Y (9.4) 9.8 BRW 8 front facade

BRW 9 Roadside 559643 193889 NO Y N Y (0.9) 8.1 Y Caffe Uno, High 2

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Site Name Site Type X OS Grid Y OS Grid Pollutants In AQMA? Is Relevant Distance to Does this Ref Ref Monitored monitoring Exposure? kerb of location collocated (Y/N with nearest road represent with a distance (m) (m) worst-case Continuous to relevant exposure? Analyser? exposure) (N/A if not Site ID (Y/N) applicable)

Street - front facade

5/7 Ongar Road NO Y N Y Roadside 559699 193948 2 Y (0.7) 3.2 BRW 10 – lamp-post1

36 Ongar Road NO Y N Y Roadside 559604 194035 2 Y (0) 5.7 BRW 11 - front facade

Corner of NO2 N N Y Ki192900ngs Road/Hart Roadside 559187 193658 Y (5.3) 2.1 Street/High BRW 12 Street

Alley adjacent NO2 N N Y to 131 High Street - lamp Roadside 559195 193681 Y (0) 2.7 post 5m from BRW 13 kerb

145 High Street NO N N Y Roadside 559148 193660 2 Y (0) 2.6 BRW 14 - front facade

4 Westbury NO2 N N Y Road - Roadside 559085 193601 Y (2) 6.9 downpipe on BRW 15 corner of house

24 Wingrove NO N N Y Urban 2 Crescent - rear 557379 192900 Y (8.3) 25.1 Background BRW 16 boundary fence

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Site Name Site Type X OS Grid Y OS Grid Pollutants In AQMA? Is Relevant Distance to Does this Ref Ref Monitored monitoring Exposure? kerb of location collocated (Y/N with nearest road represent with a distance (m) (m) worst-case Continuous to relevant exposure? Analyser? exposure) (N/A if not Site ID (Y/N) applicable)

51 Spital Lane - Urban NO N N Y 557632 193151 2 Y (3.8) 9.3 BRW 17 side garden Background

46 Selwood NO2 N N Y Road - rear Urban 557826 193333 Y (6) 20 garden tree Background BRW 18 stump

61 Warescot NO2 N Y Road - front Roadside 558769 194873 Y Y (0) 10.4 BRW 19 facade

76 Warescot NO2 N Y Road - lamp- Roadside 558818 194913 Y Y (7) 0.2 BRW 20 post

316 Ongar NO2 N Y Road - side Roadside 558681 194799 N Y (9.9) 8.2 BRW 21 gatepost

339 Ongar NO2 N Y Road - front Roadside 558683 194894 Y Y (0) 7.1 BRW 22 facade

12 Hurstwood NO2 N Y Avenue - front Roadside 558742 194928 Y Y (0) 8.2 BRW 23 facade

Highwood NO2 N Y Close - lamp- Roadside 558624 194695 N Y (18.8) 1 BRW 24 post

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Site Name Site Type X OS Grid Y OS Grid Pollutants In AQMA? Is Relevant Distance to Does this Ref Ref Monitored monitoring Exposure? kerb of location collocated (Y/N with nearest road represent with a distance (m) (m) worst-case Continuous to relevant exposure? Analyser? exposure) (N/A if not Site ID (Y/N) applicable)

65 Greenshaw - Urban NO N Y 558482 194547 2 Y Y (5.5) 21.4 BRW 25 lamp-post Background

289 Chelmsford NO2 N Y Road - Roadside 562278 196649 N Y (15.2) 2.1 BRW 26 telegraph pole

Ingatestone NO2 N Y Junior School, Urban The Furlongs - 564446 199509 N Y (11) 37 Background playground BRW 28 pergola

1 Trimble Close Urban NO N Y 564617 199849 2 Y Y (8.9) 11 BRW 29 - lamp-post Background

8 Trimble Close Urban NO N Y 564654 199898 2 Y Y (0) 9.5 BRW 30 - rear facade Background

New Road, NO N Y Urban 2 Ingatestone - 565186 200071 N Y (19.2) 18.7 Background BRW 31 telegraph pole

The Poplars, Urban NO N Y 556964 192288 2 Y Y (0) 45 BRW 32 Brook Street Background

108 NO2 N Y Roadside 559139 195012 N Y (1.6) 16.3 Road - front BRW 33 facade

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Site Name Site Type X OS Grid Y OS Grid Pollutants In AQMA? Is Relevant Distance to Does this Ref Ref Monitored monitoring Exposure? kerb of location collocated (Y/N with nearest road represent with a distance (m) (m) worst-case Continuous to relevant exposure? Analyser? exposure) (N/A if not Site ID (Y/N) applicable)

La Clarentet, NO2 N Y Talbrook - Roadside 557719 193226 N Y (2.2) 2.7 BRW 34 carport

Lincolns Lane - Urban NO N Y 556603 194628 2 N Y (12.1) 4.2 BRW 36 background Background

Vicinity of A12 - NO2 N Y railings at Roadside 558800 194947 Y Y (20.6) 1.3 Hurstwood BRW 37 Avenue

58 Roman Urban NO N Y 563659 198314 2 Y Y (9.6) 26.3 BRW 38 Road Background

Thorndon NO N Y Roadside 562412 189153 2 N Y (21.3) 2.2 BRW 39 Avenue/A127

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Figure 2.2 Location of Non-Automatic Monitoring Sites (BRW 1, 2, 3, 8, 9, 10, 11, 12, 13, 14 and 15)

Notes: Contains Ordnance Survey data © Crown copyright and database right [2012]

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Figure 2.3 Location of Non-Automatic Monitoring Sites (BRW 5, 6, 7, 16, 17, 18, 32 and 34)

Notes: Contains Ordnance Survey data © Crown copyright and database right [2012]

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Figure 2.4 Location of Non-Automatic Monitoring Sites (BRW 19, 21, 22, 23, 24, 25, 33, 36 and 37)

Notes: Contains Ordnance Survey data © Crown copyright and database right [2012]

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Figure 2.5 Location of Non-Automatic Monitoring Sites (BRW 26, 28, 29, 30, 31 and 38)

Notes: Contains Ordnance Survey data © Crown copyright and database right [2012]

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Figure 2.6 Location of Non-Automatic Monitoring Site (BRW 39)

Notes: Contains Ordnance Survey data © Crown copyright and database right [2012]

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2.2 Comparison of Monitoring Results with AQ Objectives

2.2.1 Nitrogen Dioxide

Automatic Monitoring Data

The NO2 monitoring results for 2011 from the Brentwood automatic monitor are presented in Table 2.3, along with the results from previous years.

The results show that there have been no exceedences of either the annual mean or hourly mean AQOs for NO2 in 2011 or in previous years.

Figure 2.7 illustrates the trend in annual mean NO2 concentrations between 2007 and 2011. There appears to be slightly lower concentrations between 2009 and 2011 compared to 2007 and 2008. The trend shown by the graph is one of stabilising annual mean NO2 concentrations between 2009 and 2011.

Table 2.3 Results of Automatic Monitoring of Nitrogen Dioxide: Comparison with Annual Mean and Hourly Mean Objective

Valid Data Capture for Valid Data Within period of Capture Site ID AQMA? monitoring % 2011 % Descriptor 2007 2008 2009 2010 2011

Annual mean, 28.4 30.3 26.5 26.3 26.3 μg m-3 Brentwood N 94% 94% Number of Town Hall Exceedences 0 0 0 0 0 of Hourly Mean (200 μg m-3)

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Figure 2.7 Trends in Annual Mean Nitrogen Dioxide Concentrations measured at Automatic Monitoring Sites

40 )

-3 30 g m μ

20 annual mean concentration ( concentration mean annual 2

NO 10

0 2007 2008 2009 2010 2011 Year

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Diffusion Tube Monitoring Data

Table 2.5 details the results of the NO2 diffusion tube monitoring for the past four years. Raw monthly mean concentrations for the 2011 calendar year are included in Appendix A.

Annual mean NO2 concentrations at most of the diffusion tube locations within the AQMAs are above the annual -3 mean NO2 AQO of 40 μg m . Outside of the AQMAs, only one diffusion tube location 14 (High Street,

Brentwood) measured an annual mean NO2 concentration above the AQO. During 2010, this monitor also recorded a mean concentration which exceeded the annual mean NO2 AQO; consequently, the 2011 Progress Report recommended that a Detailed Assessment was undertaken at this location. A Detailed Assessment has yet to be undertaken at this location and therefore this USA recommends that a Detailed Assessment is undertaken at this location. Diffusion tubes 7, 24, 25, 28, 29, 30 and 38 are all showing annual mean NO2 concentrations for the -3 past four years which are well below the annual mean NO2 AQO of 40 μg m . Currently these diffusion tubes are located within AQMAs. These results suggest that BBC may be able to revoke AQMAs 1, 3, 5 and 6.

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Table 2.4 Results of Nitrogen Dioxide Diffusion Tubes

Annual mean concentration (μg m-3)

Confirm if data 2008 2009 2010 2011 Data with less has been than 9 months distance (Bias (Bias (Bias (Bias Data Capture has been corrected Adjustment Adjustment Adjustment Adjustment Site ID Location 2011 (%) annualised (Y/N) (Y/N) factor = 0.81) factor = 0.81) factor = 0.85) factor = 0.84)

Council Offices BRW 1 next to NOx Box 100% N/A N/A 26.8 24.5 31.8 30.5

Council Offices N/A N/A BRW 2 next to NOx Box 100% 28.5 25.8 31.7 33.0

Council Offices N/A N/A BRW 3 next to NOx Box 100% 28.8 25.7 31.3 31.0

Telegraph pole at N/A N/A end of Brook BRW 5 Street 100% 52.7 49.2 53.5 52.3

Freeway Cottage, N/A N/A BRW 6 63 Brook Street 100% 51.6 49.6 46.1 48.2

13 Nags Head N/A N/A Lane - on fence BRW 7 trellis 100% 33.3 31.5 33.1 31.7

3 High Street - N/A N/A BRW 8 front facade 83% 43.6 43.8 44.3 44.7

Caffe Uno, High N/A N/A Street - front BRW 9 facade 100% 41.9 44.6 42.8 37.2

BRW 5/7 Ongar Road – N/A N/A 10 lamp-post1 83% 50.0 47.5 54.9 60.7

BRW 36 Ongar Road - N/A N/A 11 front facade 92% 42.4 39.2 42.8 40.2

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Annual mean concentration (μg m-3)

Confirm if data 2008 2009 2010 2011 Data with less has been than 9 months distance (Bias (Bias (Bias (Bias Data Capture has been corrected Adjustment Adjustment Adjustment Adjustment Site ID Location 2011 (%) annualised (Y/N) (Y/N) factor = 0.81) factor = 0.81) factor = 0.85) factor = 0.84)

Corner of N/A N/A Ki192900ngs BRW Road/Hart 12 Street/High Street 100% 42.3 38.2 36.5 31.8

Alley adj to 131 N/A N/A BRW High Street - lamp 13 post 5m from kerb 100% 43.1 41.8 40.0 39.9

BRW 145 High Street - N/A N/A 14 front facade 100% 57.5 39.4 45.0 40.4

4 Westbury Road N/A N/A BRW - downpipe on 15 corner of house 100% 39.4 30.8 33.6 28.0

24 Wingrove N/A N/A BRW Crescent - rear 16 boundary fence 100% 38.0 32.1 34.3 35.5

BRW 51 Spital Lane - N/A N/A 17 side garden 92% 34.9 30.5 35.1 33.4

46 Selwood Road N/A N/A BRW - rear garden tree 18 stump 100% 30.4 28.1 31.1 29.7

61 Warescot N/A N/A BRW Road - front 19 facade 100% 38.4 34.0 35.8 34.6

BRW 76 Warescot N/A N/A 20 Road - lamp-post 100% 43.9 39.4 43.7 41.5

BRW 316 Ongar Road - N/A N/A 21 side gatepost 100% 32.5 28.4 32.1 31.5

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Annual mean concentration (μg m-3)

Confirm if data 2008 2009 2010 2011 Data with less has been than 9 months distance (Bias (Bias (Bias (Bias Data Capture has been corrected Adjustment Adjustment Adjustment Adjustment Site ID Location 2011 (%) annualised (Y/N) (Y/N) factor = 0.81) factor = 0.81) factor = 0.85) factor = 0.84)

BRW 339 Ongar Road - N/A N/A 22 front facade 100% 40.8 39.9 37.7 39.9

12 Hurstwood N/A N/A BRW Avenue - front 23 facade 92% 43.0 41.1 42.4 41.9

BRW Highwood Close - N/A N/A 24 lamp-post 100% 33.7 30.5 34.1 32.0

BRW 65 Greenshaw - N/A N/A 25 lamp-post 100% 36.8 32.1 35.3 36.6

289 Chelmsford N/A N/A BRW Road - telegraph 26 pole 100% 36.8 33.2 37.6 35.5

Ingatestone Junior N/A N/A School, The Furlongs - BRW playground 28 pergola 100% 30.2 30.3 31.9 32.5

BRW 1 Trimble Close - N/A N/A 29 lamp-post 100% 35.8 31.4 32.7 33.0

BRW 8 Trimble Close - N/A N/A 30 rear facade 100% 39.1 31.4 37.4 35.7

New Road, N/A N/A BRW Ingatestone - 31 telegraph pole 92% 34.4 30.3 36.0 32.4

BRW The Poplars, N/A N/A 32 Brook Street 100% 40.6 36.8 40.9 37.4

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Annual mean concentration (μg m-3)

Confirm if data 2008 2009 2010 2011 Data with less has been than 9 months distance (Bias (Bias (Bias (Bias Data Capture has been corrected Adjustment Adjustment Adjustment Adjustment Site ID Location 2011 (%) annualised (Y/N) (Y/N) factor = 0.81) factor = 0.81) factor = 0.85) factor = 0.84)

108 Doddinghurst N/A N/A BRW Road - front 33 facade 100% 32.4 30.3 33.2 32.5

BRW La Clarentet, N/A N/A 34 Talbrook - carport 100% 36.2 31.8 36.3 33.7

BRW Lincolns Lane - N/A N/A 36 background 100% 21.2 18.2 18.5 20.4

Vicinity of A12 - N/A N/A railings at BRW Hurstwood 37 Avenue 92% 95.5 94.4 89.0 98.6

BRW N/A N/A 38 58 Roman Road 100% 24.8 24.7 25.8 25.2

BRW Thorndon N/A N/A 39 Avenue/A127 100% 42.8 39.6 36.4 32.6

-3 Notes: Exceedences of NO2 annual mean AQO of 40 μg m shown in bold.

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2.2.2 PM10

No PM10 monitoring is undertaken by Brentwood Borough Council.

2.2.3 Sulphur Dioxide

No sulphur dioxide monitoring is undertaken by Brentwood Borough Council.

2.2.4 Benzene

No benzene monitoring is undertaken by Brentwood Borough Council.

2.2.5 Other pollutants

No other pollutants are monitored by Brentwood Borough Council.

2.2.6 Summary of Compliance with AQS Objectives

Brentwood Borough Council has examined the results from monitoring in the Borough. Concentrations are all below the objectives for all of the monitoring locations outside the AQMAs, with the exception of location 14. As recommended in the previous Progress Report, this diffusion tube location should be the subject of a Detailed Assessment. Therefore, this USA recommends that a Detailed Assessment is undertaken for NO2 diffusion tube location 14.

Several of the NO2 diffusion tubes located within the AQMAs have monitored annual mean NO2 concentrations well below the annual mean NO2 AQO for the past four years. Brentwood Borough Council may therefore be able to consider whether they should revoke AQMAs 1, 3, 5 and 6.

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3. Road Traffic Sources

Brentwood Borough Council has not identified any roads or junctions that require assessment under the following criteria.

3.1 Narrow Congested Streets with Residential Properties Close to the Kerb

Brentwood Borough Council confirms that there are no new/newly identified congested streets with a flow above 5,000 vehicles per day and residential properties close to the kerb, that have not been adequately considered in previous rounds of Review and Assessment.

3.2 Busy Streets Where People May Spend 1-hour or More Close to Traffic

Brentwood Borough Council confirms that there are no new/newly identified busy streets where people may spend 1 hour or more close to traffic.

3.3 Roads with a High Flow of Buses and/or HGVs

This assessment considers roads where there are unusually high proportions of buses and/or HGVs and traffic flows are less than 20,000 vehicles per day, but more than 2,500 HGVs per day. The assessment is also dependent on whether the flow of HGVs is greater than 2,500 per day and relevant exposure being within 10m of the kerbside.

Brentwood Borough Council confirms that there are no new/newly identified roads with high flows of buses/HDVs.

3.4 Junctions

Concentrations are usually higher close to junctions, due to the combined effect of traffic emissions on two or more roads and stop-start driving. The assessment, which considers both PM10 and NO2, is dependent on relevant exposure being within 10m of the kerb.

Brentwood Borough Council confirms that there are no new/newly identified busy junctions/busy roads.

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3.5 New Roads Constructed or Proposed Since the Last Round of Review and Assessment

The approach to considering new roads will depend on whether or not an assessment was carried out in advance of building the new road. If the air quality assessment predicted exceedences of NO2 and PM10 at relevant locations then it will be necessary to proceed to a Detailed Assessment.

Brentwood Borough Council confirms that there are no new/proposed roads.

3.6 Roads with Significantly Changed Traffic Flows

The assessment only considers roads which experience traffic flows more than 10,000 vehicles per day and have an increase in traffic flow more than 25%.

Brentwood Borough Council confirms that there are no new/newly identified roads with significantly changed traffic flows.

3.7 Bus and Coach Stations

The assessment considers both NO2 and PM10 emissions at bus stations that are not enclosed, with more than 2,500 movements per day and where there is relevant exposure within 10m of any part of the bus station.

Brentwood Borough Council confirms that there are no relevant bus stations in the Local Authority area.

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4. Other Transport Sources

4.1 Airports

The assessment for airports considers NO2. If there are no airports in the Local Authority area, there is no need to proceed further with this part.

Brentwood Borough Council confirms that there are no airports in the Local Authority area.

4.2 Railways (Diesel and Steam Trains)

Stationary trains can give rise to high levels of SO2 close to the point of emission. In addition, moving diesel trains can give rise to high NO2 concentrations. If there are no railways carrying diesel or steam trains in the Local Authority, there is no need to proceed further with this part.

4.2.1 Stationary Trains

Brentwood Borough Council confirms that there are no locations where diesel or steam trains are regularly stationary for periods of 15 minutes or more, with potential for relevant exposure within 15m.

4.2.2 Moving Trains

Brentwood Borough Council confirms that there are no locations with a large number of movements of diesel locomotives, and potential long- term relevant exposure within 30m.

4.3 Ports (Shipping)

The assessment for shipping considers SO2 emissions where receptors are located within 250m of the berths and 1km of the main manoeuvring areas.

Brentwood Borough Council confirms that there are no ports or shipping that meet the specified criteria within the Local Authority area.

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5. Industrial Sources

5.1 Industrial Installations

The assessment of industrial installations considers all of the regulated pollutants. A list of the permitted processes within Brentwood Borough Council is shown in Appendix C.

5.1.1 New or Proposed Installations for which an Air Quality Assessment has been Carried Out

Brentwood Borough Council confirms that there are no new or proposed industrial installations for which planning approval has been granted within its area or nearby in a neighbouring authority.

5.1.2 Existing Installations where Emissions have Increased Substantially or New Relevant Exposure has been Introduced

Brentwood Borough Council confirms that there are no industrial installations with substantially increased emissions or new relevant exposure in their vicinity within its area or nearby in a neighbouring authority.

5.1.3 New or Significantly Changed Installations with No Previous Air Quality Assessment

Brentwood Borough Council confirms that there are no new or proposed industrial installations for which planning approval has been granted within its area or nearby in a neighbouring authority.

5.2 Major Fuel (Petrol) Storage Depots

The assessment considers benzene with respect to the 2010 objective. Previous rounds of Review and Assessment found that there were no major fuel storage depots and the situation has not changed.

There are no major fuel (petrol) storage depots within the Local Authority area.

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5.3 Petrol Stations

Similar to major fuel storage depots, the assessment for petrol stations considers benzene, with respect to the 2010 objective.

Large petrol stations, which have not been covered in previous Review and Assessment reports, are to be assessed if the annual throughput is more than 2,000m3 of petrol and if situated next to a busy road (>30,000 annual average traffic flow).

Brentwood Borough Council confirms that there are no petrol stations meeting the specified criteria.

5.4 Poultry Farms

Poultry farms in the Local Authority that house more than 400,000 birds if mechanically ventilated, 200,000 birds if naturally ventilated, and 100,000 birds for a turkey unit, require consideration in this assessment to establish whether there is relevant exposure within 100m of the poultry units. The assessment considers PM10.

Brentwood Borough Council confirms that there are no poultry farms meeting the specified criteria.

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6. Commercial and Domestic Sources

6.1 Biomass Combustion – Individual Installations

The assessment considers both NO2 and PM10. However, currently, there are no biomass processes with planning permission that meet the criteria for the assessment.

Brentwood Borough Council confirms that there are no biomass combustion plants in the Local Authority area.

6.2 Biomass Combustion – Combined Impacts

Brentwood Borough Council confirms that there are no biomass combustion plants in the Local Authority area.

6.3 Domestic Solid-Fuel Burning

The assessment for domestic solid-fuel burning considers SO2 emissions from significant areas that use solid fuels to heat houses. ‘Significant areas’ are defined as areas approximately 500x500m with more than 50 houses burning solid fuel as their primary source of heating.

Brentwood Borough Council confirms that there are no areas of significant domestic fuel use in the Local Authority area.

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7. Fugitive or Uncontrolled Sources

The assessment of fugitive and uncontrolled sources considers the PM10 objectives. This includes consideration to quarries, landfill sites, opencast coal mining, waste transfer sites and materials handling. Only locations not covered by previous rounds of Review and Assessment, or where there is new relevant exposure, require consideration. In the case of proposed new sources, they are only required to be considered if planning approval has been granted.

Brentwood Borough Council confirms that there are no potential sources of fugitive particulate matter emissions in the Local Authority area.

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8. Conclusions and Proposed Actions

8.1 Conclusions from New Monitoring Data

The monitoring undertaken within the Borough has shown that there are no exceedences of the AQOs for NO2 at most relevant locations outside of the existing AQMAs. An exceedence was observed at diffusion tube location 14 (High Street, Brentwood). An exceedence at this location was identified in the previous Progress Report on the basis of the 2010 monitoring data. Brentwood Borough Council is therefore required to undertake a Detailed Assessment for this location.

Several of the NO2 diffusion tubes located within the AQMAs have monitored annual mean NO2 concentrations well below the annual mean NO2 AQO for the past four years. Brentwood Borough Council may therefore consider whether they should revoke AQMAs 1, 3, 5 and 6.

The trend in the monitoring data has been one of stable annual mean concentrations for the past three years, with little fluctuation between values.

8.2 Conclusions from Assessment of Sources

Assessment of the potential sources of air quality pollutants in the Borough has lead to the conclusion that there are no newly identified sources of air pollutants, and the existing sources of air pollutants in the Borough have not altered significantly as to impact upon Air Quality in the Borough.

8.3 Proposed Actions

The USA has identified the need to proceed to a Detailed Assessment for an exceedence of the annual mean NO2 AQO at diffusion tube location 14. This exceedence was also shown at diffusion tube 14 in the previous Progress Report for 2011.

Due to several of the NO2 diffusion tubes within the AQMAs monitoring annual mean concentrations of NO2 well below the annual mean NO2 AQO, the AQMAs 1, 3, 5 and 6 could be revoked.

The USA has not identified any need for additional monitoring or changes to the current monitoring programme.

The next course of action for Brentwood Borough Council will be to submit a Progress Report by the end of April

2013 for all pollutants and monitoring locations apart from NO2 diffusion tube 14, which will be the subject of a Detailed Assessment. In addition the revocation of AQMAs 1, 3, 5 and 6 should also be considered.

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9. References

Brentwood Borough Council (2009) Local Air Quality Management Updating and Screening Assessment.

Brentwood Borough Council (2010) Local Air Quality Management Annual Progress Report.

Brentwood Borough Council (2011) Local Air Quality Management Annual Progress Report.

Defra (2009). Local Air Quality Management: Technical Guidance. London: Defra Publications. (LAQM.TG(09)).

Defra (2012) National Diffusion Tube Bias Adjustment Factor Spreadsheet (version number: 03/12). Available from: http://laqm.defra.gov.uk/documents/Diffusion_Tube_Bias_Factors-v03_12.xls

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Appendix A Diffusion Tube Raw Data 2011

Table A.1 Nitrogen Dioxide Raw Monitoring Data 2011 (ppb unless otherwise stated)

Ref Site Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Raw Bias Mean (Bias Description Mean Corrected Corrected) (μg m-3)

BRW Council 27.3 22.0 25.4 17.2 11.9 15.2 11.2 14.1 17.9 19.7 24.1 22.3 19.0 16.0 30.5 1 Offices next to NOx Box

BRW Council 28.8 25.3 29.2 21.1 11.5 12.3 12.4 17.1 23.5 21.1 25.4 19.0 20.6 17.3 33.0 2 Offices next to NOx Box

BRW Council 22.7 25.6 22.7 20.7 15.1 14.6 12.6 15.5 19.0 18.9 24.4 19.8 19.3 16.2 31.0 3 Offices next to NOx Box

BRW Telegraph 39.7 35.5 32.1 31.9 28.2 28.9 24.2 29.5 37.2 32.6 33.7 37.5 32.6 27.4 52.3 5 pole at end of Brook Street

BRW Freeway 33.5 36.2 30.9 32.2 21.9 22.8 24.3 27.0 36.4 31.2 29.1 34.7 30.0 25.2 48.2 6 Cottage, 63 Brook Street

BRW 13 Nags Head 22.9 22.2 18.9 19.3 16.2 17.6 15.7 16.5 22.1 21.8 20.0 23.6 19.7 16.6 31.7 7 Lane - on fence trellis

BRW 3 High Street - Missing Missing 35.3 28.0 24.6 23.5 24.7 22.7 26.8 30.3 32.9 29.5 27.8 23.4 44.7 8 front facade

BRW Caffe Uno, 33.2 23.8 26.9 23.3 18.1 18.5 18.8 18.4 23.6 22.0 27.1 24.8 23.2 19.5 37.2 9 High Street - front facade

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Ref Site Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Raw Bias Mean (Bias Description Mean Corrected Corrected) (μg m-3)

BRW 5/7 Ongar 55.6 38.6 45.3 39.7 33.0 45.8 33.7 30.2 Missing 28.7 Missing 27.5 37.8 31.8 60.7 10 Road - lamp- post

BRW 36 Ongar 34.4 30.2 28.4 Missing 18.8 19.4 16.3 19.9 27.3 25.2 28.1 27.9 25.1 21.1 40.2 11 Road - front facade

BRW Corner of 28.7 23.2 26.0 18.0 12.9 16.2 14.1 16.1 18.0 20.0 23.1 21.6 19.8 16.7 31.8 12 Kings Road/Hart Street/High Street

BRW Alley adj to 28.3 27.4 26.7 22.9 21.9 22.8 17.8 21.7 28.9 27.7 28.0 24.1 24.9 20.9 39.9 13 131 High Street - lamp post 5m from kerb

BRW 145 High 38.9 27.1 29.4 23.0 19.3 20.5 20.0 20.2 23.3 21.4 31.1 27.7 25.2 21.1 40.4 14 Street - front facade BRW 4 Westbury 29.3 21.6 25.7 16.1 11.0 13.7 11.2 12.3 14.3 16.8 20.0 17.3 17.4 14.7 28.0 15 Road - downpipe on corner of house BRW 24 Wingrove 28.7 24.6 24.6 17.3 18.1 19.3 16.0 19.4 24.9 23.1 21.7 27.6 22.1 18.6 35.5 16 Crescent - rear boundary fence BRW 51 Spital Lane 21.4 21.9 21.2 15.8 18.8 19.1 19.9 23.3 21.1 22.0 24.2 20.8 17.5 33.4 17 - side garden BRW 46 Selwood 25.6 22.5 19.8 19.5 14.0 13.8 14.9 15.5 17.8 16.2 19.9 22.8 18.5 15.6 29.7 18 Road - rear garden tree stump

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Ref Site Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Raw Bias Mean (Bias Description Mean Corrected Corrected) (μg m-3)

BRW 61 Warescot 29.7 22.8 26.7 25.3 16.1 16.1 17.0 18.8 21.8 19.4 22.7 22.4 21.6 18.1 34.6 19 Road - front facade

BRW 76 Warescot 41.1 27.1 34.3 31.9 19.1 19.7 23.3 20.4 23.9 24.4 20.5 25.0 25.9 21.7 41.5 20 Road - lamp- post

BRW 316 Ongar 25.1 21.1 24.0 22.7 14.7 14.6 15.7 17.5 21.6 18.0 21.6 18.8 19.6 16.5 31.5 21 Road - side gatepost

BRW 339 Ongar 26.0 32.7 29.6 20.7 17.2 18.4 16.9 21.7 31.6 25.0 33.7 25.2 24.9 20.9 39.9 22 Road - front facade

BRW 12 Hurstwood 29.0 27.1 29.1 28.2 21.3 20.4 20.6 23.9 31.3 27.0 Missing 29.2 26.1 21.9 41.9 23 Avenue - front facade

BRW Highwood 27.2 23.7 23.3 19.3 11.8 15.0 12.1 16.2 21.1 20.2 25.5 24.1 20.0 16.8 32.0 24 Close - lamp- post

BRW 65 Greenshaw 30.1 25.5 25.9 24.6 17.0 19.5 16.2 20.0 23.7 23.7 25.2 22.3 22.8 19.2 36.6 25 - lamp-post

BRW 289 35.3 25.2 26.9 23.2 13.6 14.8 14.3 18.3 20.9 20.8 25.0 27.1 22.1 18.6 35.5 26 Chelmsford Road - telegraph pole

BRW Ingatestone 28.0 23.1 23.2 19.4 14.7 17.2 14.9 17.2 21.1 19.5 22.4 22.2 20.2 17.0 32.5 28 Junior School, The Furlongs - playground pergola

BRW 1 Trimble 29.1 22.3 23.9 21.7 13.9 15.1 13.4 18.2 21.5 19.6 25.2 23.1 20.6 17.3 33.0 29 Close - lamp- post

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Ref Site Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Raw Bias Mean (Bias Description Mean Corrected Corrected) (μg m-3)

BRW 8 Trimble 27.2 24.5 25.1 25.3 15.6 18.7 16.9 19.5 22.8 21.5 25.6 24.0 22.2 18.7 35.7 30 Close - rear facade

BRW New Road, 32.1 20.0 27.1 24.7 13.9 17.0 18.6 14.7 Missing 17.0 20.8 16.5 20.2 17.0 32.4 31 Ingatestone - telegraph pole

BRW The Poplars, 26.0 26.4 20.1 19.3 18.9 20.4 15.4 23.6 26.4 27.1 26.7 29.3 23.3 19.6 37.4 32 Brook Street

BRW 108 25.5 23.7 21.7 20.1 17.1 16.2 16.1 17.6 19.9 20.0 20.9 24.5 20.3 17.0 32.5 33 Doddinghurst Road - front facade

BRW La Clarentet, 26.6 26.1 21.9 22.4 16.8 18.0 17.5 18.6 20.6 20.5 18.5 24.8 21.0 17.7 33.7 34 Talbrook - carport

BRW Lincolns Lane 14.1 17.5 14.0 11.4 8.3 10.3 6.3 10.0 12.7 14.8 18.1 15.0 12.7 10.7 20.4 36 - background

BRW Vicinity of A12 65.4 70.3 60.3 48.8 49.7 53.7 Missing 53.3 71.6 69.5 69.8 63.7 61.5 51.6 98.6 37 - railings at Hurstwood Avenue

BRW 58 Roman 17.1 21.4 20.6 16.3 9.6 12.1 10.8 12.4 15.0 16.7 20.9 15.3 15.7 13.2 25.2 38 Road

BRW Thorndon 31.9 22.8 24.7 19.9 14.7 12.6 15.4 14.1 17.5 21.6 24.1 24.2 20.3 17.0 32.6 39 Avenue/A127

Notes: Raw results presented in ppb. Results bias corrected (using a factor of 0.84) and then converted to μg m-3.using standard EC conversion factor.(1.91) -3 Exceedences of NO2 annual mean AQO of 40 μg m shown in bold.

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Appendix B QA/QC Data

Diffusion Tube Bias Adjustment Factors

The diffusion tubes were supplied by Harwell Scientific Services. The tubes were prepared using a 50% TEA in acetone method.

The bias adjustment factor for the tubes has been taken from Defra’s UK national bias adjustment spreadsheet (version 03/12) and is based on the results of 18 studies in 2011. The bias adjustment factor is 0.84.

Although triplicate tubes are co-located with the continuous monitor at Brentwood Town Hall, it was deemed that Defra’s UK national bias adjustment spreadsheet would provide a more reliable bias correction factor.

QA/QC of Automatic Monitoring

The continuous monitor operated by Brentwood Borough Council is calibrated on a fortnightly basis by Brentwood Borough Council. It is also serviced on a 6 monthly basis by the equipment manufacturer. The site is also part of the London Air Quality Network and the data from the monitor is ratified by Kings ERG.

QA/QC of Diffusion Tube Monitoring

Harwell Scientific Services takes part in the Workplace Analysis Scheme for Proficiency (WASP). As Harwell Scientific Services are now part of the ESG Group, their scores are recorded under this name in the scheme.

Their performance for each quarter in 2011 is summarised in the table below. The table provides a percentage of results submitted which were subsequently determined to be satisfactory based upon a z-score of <±2.

Jan- Mar 2011 Apr-Jun 2011 Jul- Sep 2011 Oct- Dec 2011

100% 100% 100% 100%

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Appendix C List of Prescribed Processes

Company Address Process

RMC Ready Mix East Anglia RMC House, Whitehall Road, Colchester, Blending, Packing, Loading & Use of Bulk Essex CO2 8HD Cement

E.O. Burton & Co. Ltd. Thorndon Sawmills, The Avenue, Brentwood, Manufacture of Timber & Wood Based Essex CM13 3RZ Products

Argos Services Ltd. 15 Industrial Park, West Powder Coating Processes, including Horndon, Brentwood, Essex CM13 3XS Sherardizing

UK Crushing & Development Norton Field Farm, Norton Lane, Norton Mobile Crushing & Screening Processes Mandeville, Essex CM4 0LN

CLC Construction Ltd. Head Office, Unit 29 Childerditch Industrial Mobile Crushing & Screening Processes Park, Childerditch Hall Drive, Brentwood, Essex CM13 3HD

Forefront Utilities Ltd. Unit A Codham Hall, Codham Hall Lane, Mobile Crushing & Screening Processes Great Warley, Brentwood, Essex CM13 3JT

Mr. Elegance Dry Cleaning Unit 2, 1 Crescent Road, Warley, Brentwood, Dry Cleaners Essex CM14 5JR

Merlin Dry Cleaners 66 Woodland Avenue, Hutton, Brentwood, Dry Cleaners Essex CM13 1HH

Bubbles Prestige 82 Church Lane, Doddinghurst, Brentwood, Dry Cleaners Essex CM15 0NG

Brentwood Dry Cleaners 69 Ongar Road, Brentwood, Essex CM15 Dry Cleaners 9AZ

Dry Cleaning Plus 97 Hutton Road, Shenfield, Brentwood, Essex Dry Cleaners CM15 8JD

Ingatestone Dry Cleaners 64 High Street, Ingatestone, Essex CM4 9DW Dry Cleaners

On The Spot 49 Kings Road, Brentwood, Essex CM14 4DJ Dry Cleaners

The Clean Shop 79 Hutton Road, Shenfield, Brentwood, Essex Dry Cleaners CM15 8JD

RS Dry Cleaning 8 The Keys Eagle Way, Great Warley, Dry Cleaners Brentwood, Essex CM13 3BP

Superpress 100 High Street, Brentwood, Essex CM14 Dry Cleaners 4AP

Hutton Dry Cleaners 210b Rayleigh Road, Hutton, Brentwood, Dry Cleaners Essex CM13 1PN

Loft Hall Farm Old Road, Navestock, Romford, Essex RM4 Waste Oil Burner 1HD

Hi-Ho Workshops Wyatts Green Lane, Wyatts Green, Waste Oil Burner Brentwood, Essex CM15 0PJ

Tesco Brentwood Express 2176, 6 London Road, Brentwood, Service Station EssexCM14 4QG

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report

Company Address Process

Jet Service Station A127, Little Warley Hall Lane, Brentwood, Service Station Essex CM13 3ES

BP Brentwood Connect 297 Chelmsford Road, Mountnessing, Essex Service Station CM15 8SD

Total Convenience Store 146/148 Warley Hill, Brentwood, Essex CM14 Service Station 5JX

BP Ongar Road SF Connect 377 Ongar Road, Pilgrims Hatch, Brentwood, Service Station Essex CM15 9JG

Warley Service Station Arterial Road, Little Warley, Essex CM13 3ES Service Station

Ingrave Service Station Brentwood Road, Ingrave, Brentwood, Essex Service Station CM13 3NY

Hutton Mount Service Station Rayleigh Road, Hutton, Brentwood, Essex Service Station CM13 1AB

Total South Weald Service Station Brook Street, Brentwood, Essex CM14 5NA Service Station

© AMEC Environment & Infrastructure UK Limited May 2012 Doc Reg No. 32244/Brentwood/Final Report